A fan for an air conditioner

ES 2 395 904 T3

DESCRIPTION

A fan for an air conditioner.

Technical field

The present invention relates to front suction / discharge type outdoor units in air conditioners for sucking air through a front part and discharging heat exchanged air to the front part again, and ventilation apparatuses applied thereto, and more particularly, to an outdoor unit of the front suction / discharge type in an air conditioner having a ventilation apparatus applied thereto, In which a high performance and stable brushless DC motor is employed to improve the performance of the fan, and the heat exchange.

Background of the technique

Document WO-03/073010-A2 discloses a front / discharge type outdoor unit for an air conditioner according to the preamble of claim 1 comprising a suction casing of the outdoor unit, a casing of outdoor unit discharge, wherein open surfaces are respectively formed on the suction casing of the outdoor unit and the discharge casing of the outdoor unit to connect them to discharge the sucked external air. Furthermore, DE-199-11-158-A1 discloses a brushless motor for use in a fan of an automobile air conditioning system.

In general, in air conditioners, there are split-type air conditioners each having an indoor unit and an outdoor unit respectively installed in a separate room and outdoor space, and unit-type air conditioners each having one unit. indoor and outdoor unit manufactured as a unit, for installation on a window or wall, in which split-type air conditioners are widely used due to, not only to the sizes of the indoor units and the outdoor units that become larger as the cooling / heating capacities of the air conditioners become greater, but also to the heavy vibration of the outdoor units that comes from the compressors in them.

The split type air conditioner is provided with the indoor unit in a room to make the heat exchange between low-temperature and low-pressure gaseous refrigerant and the air to supply hot or cold air in a space to be conditioned, the unit of outside in an outside to compress, condense, and expand the refrigerant to do heat exchange in the indoor unit, and the refrigerant pipes between the indoor unit and the outdoor unit.

The indoor unit is provided with an indoor casing having an inlet and an outlet for sucking / discharging room air, an evaporator in the indoor casing to make the heat exchange between the low-temperature and low-temperature gaseous refrigerant. pressure passing through it and the air, and an indoor fan and motor on one side of the evaporator to make the air in the room pass through the evaporator so that cool air is discharged back into the room.

The outdoor unit is provided with an outdoor shell having an inlet and an outlet for sucking / discharging outdoor air, a compressor in the outdoor shell for compressing the high-temperature and high-pressure gaseous refrigerant passed through the evaporator, a condenser to make the heat exchange between the refrigerant passed through the compressor with the outside air to condense the refrigerant into a medium temperature and high pressure liquid refrigerant, expansion means, such as a capillary tube, or an expansion valve electronics to decompress the refrigerant passed through the condenser into a low-temperature, low-pressure gaseous refrigerant, and an axial outdoor fan and a motor on one side of the capacitor to make the outside air pass through the capacitor, wherein the motor is a single-phase, or three-phase induction motor having a stator mounted inside a housing , and a shaft and a rotor in a central part of the stator to rotate the rotor by a rotating magnetic field formed when AC is applied to the stator.

In general, the outdoor housing has the inlets on three sides to improve the performance of a fan, and the outlet on a higher surface, to draw air through the three sides, causing the air to exchange heat, and discharge the air. to the upper surface.

The compressor, condenser, expansion means, and evaporator are connected with the ducts of

ES 2 395 904 T3 refrigerant with each other, for the circulation of the refrigerant therethrough while the refrigerant is compressed, condensed, expanded, and evaporated.

On the other hand, the aforementioned outdoor unit of the related art air conditioner has a limited installation place due to the high concentration of a city, with the consequent tightening of environmental control, and becomes an object of complaints due to the noise and heat emission. Particularly, for an apartment in a large group of apartment blocks, the installation of the air conditioning is regulated in such a way that the outdoor unit is installed inside a veranda due to the external appearance and noise.

As a consequence, lately outdoor air conditioning units of a front suction / discharge type are employed in the large group of apartment blocks, in which air is drawn in through only one front part, made to exchange heat, and unloads to the front, again.

However, the front suction / discharge type air conditioning outdoor unit has low fan and heat exchange performances due to a smaller air suction area than the front discharge type air conditioning outdoor unit. suction / discharge on three sides.

In addition, the general single-phase or three-phase induction motor used for the front suction / discharge type air conditioner outdoor unit fan has problems in that the overall efficiency is low below 40 ~ 50%, and the Rotational speed variation is limited to a small range due to a narrow range of stable torque. If a rotational speed is outside the stable torque range, the noise becomes louder and the performance becomes poorer.

Disclosure of the invention

An object of the present invention is to provide a ventilation apparatus that can reduce noise, and improve fan performances, and heat exchange by employing a brushless DC motor that can realize stable fan drive, and increase a air flow rate, and a front suction / discharge type outdoor unit in an air conditioner that has the same employee in it.

The object of the present invention can be achieved by providing a ventilation apparatus for an air conditioner including an outer casing, a fan housing secured to an interior of the outer casing having air inlets and an air outlet, a mounted fan in an interior of the fan housing, a shaft coupled to the fan for transmission of motive force from a motor to the fan, bearings to support the shaft, a brushless DC motor having a rotor and a stator to provide rotational force to the fan, a bracket secured to a top of the fan housing to support the bearings and stator, and a rotor bushing between the shaft and the rotor for transmitting a driving force from the rotor to the shaft.

According to a preferred embodiment the ventilation apparatus includes an outer casing, a fan housing secured to an interior of the outer casing having air inlets facing upwards and downwards respectively and an air outlet facing towards the front. , a sirocco fan, a centrifugal type fan, mounted in an interior of the fan housing, a shaft coupled to the sirocco fan for the transmission of motive force from a motor to the sirocco fan, bearings to support the shaft, a bracket secured to a top of the fan housing to support the bearings and stator, a rotor hub of a insulating material attached to an end portion of the shaft opposite one side that has the fan attached to it, a rotor attached to the rotor hub for transmission of driving force to the shaft through the rotor hub, and a stator mounted firmly on the bracket so that it is positioned inside the rotor to maintain concentricity with respect to the rotor to place a brushless DC motor together with the rotor.

In another aspect of the present invention, an outdoor unit of a front suction / discharge type in an air conditioner includes a casing having a front part divided into an inlet and an outlet, a compressor in the casing for compressing refrigerant passed to Through an indoor unit, a condenser in the shell to make the refrigerant passed through the compressor exchange heat with ambient air, to condense the refrigerant, a ventilation apparatus according to claim 1 for causing the air drawn in through the inlet to pass through a heat exchanger, and to be discharged through the outlet, a fan housing secured in the casing to guide an air flow path introduced into / discharged from the fan, the fan housing having the fan mounted therein, a brushless DC motor coupled to the fan to rotate the fan, and a bracket secured to the fan housing

ES 2 395 904 T3 to support brushless DC motor.

Brief description of the drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiment (s) of the invention and together with the description serve to explain the principle of the invention.

In the drawings;

FIG. 1 illustrates a perspective view of a ventilation apparatus for an air conditioner according to a preferred embodiment of the present invention;

FIG. 2 illustrates a reference perspective view of an assembly of a brushless DC motor and a bracket in a state in which the assembly is separated from a fan housing and a fan;

FIG. 3A illustrates a section of a ventilation apparatus in accordance with a preferred embodiment of the present invention;

FIG. 3B illustrates a partial enlarged view of the motor and bracket in FIG. 3A;

FIG. 4A illustrates a perspective view of the bracket in FIG. 3A;

FIG. 4B illustrates a bottom perspective view of FIG. 4A;

FIG. 5 illustrates a partial perspective view showing a state in which a vibration damping member is mounted on a support securing portion of a support;

FIG. 6A illustrates a perspective view of the sirocco fan in FIG. 3A;

FIG. 6B illustrates a plan view of FIG. 6A;

FIG. 7A illustrates a perspective view of the rotor in FIG. 3A, with a partial sectional view;

FIG. 7B illustrates a bottom perspective view of FIG. 7A;

FIG. 8A illustrates a perspective view of the rotor hub in FIG. 3A;

FIG. 8B illustrates a bottom perspective view of FIG. 8A;

FIG. 9 illustrates a perspective view of a magnet applied to a rotor in accordance with another embodiment of the present invention;

FIG. 10 illustrates a perspective view of the stator in FIG. 3A;

FIG. 11 illustrates a disassembled perspective view of FIG. 10;

FIG. 12 illustrates a perspective view of a helical core, such as an enlarged view of the core in FIG. eleven;

FIG. 13 illustrates a perspective view of another example of a stator applicable to the present invention;

FIG. 14 illustrates a perspective view of a split core, as an example of the core structure in FIG. 13;

FIG. 15 illustrates a perspective view of another example of a stator applicable to the present invention;

FIG. 16 illustrates a perspective view of a one-piece core, as an example of a core structure in FIG. fifteen;

ES 2 395 904 T3

FIG. 17 illustrates a perspective view of another embodiment of a support applicable to the present invention;

FIG. 18 illustrates a perspective view showing an installation state of an air conditioning outdoor unit of a front suction / discharge type having a ventilation apparatus of the present invention applied thereto, with a partial cutaway view;

FIG. 19 illustrates a disassembled perspective view showing an installation state of a front suction / discharge type air conditioning outdoor unit having the ventilation apparatus of the present invention applied thereto; Y

FIG. 20 illustrates a front view showing an installation state of a front suction / discharge type air conditioning outdoor unit having the ventilation apparatus of the present invention applied thereto.

Best mode of carrying out the invention

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In describing the embodiments, identical parts will be given the same names, and the additional and repetitive description of which will be omitted.

A ventilation apparatus which is applied to the front suction / discharge type air conditioner of the present invention will be described.

FIG. 1 illustrates a perspective view of a ventilation apparatus for an air conditioner according to a preferred embodiment of the present invention, FIG. 2 illustrates a reference perspective view of an assembly of a brushless DC motor and a bracket in a state in which the assembly is separated from a fan housing and a fan, FIG. 3A illustrates a section of a ventilation apparatus in accordance with a preferred embodiment of the present invention, and FIG. 3B illustrates a partial enlarged view of the motor and bracket in FIG. 3A.

FIG. 4A illustrates a perspective view of the bracket in FIG. 3A, FIG. 4B illustrates a bottom perspective view of FIG. 4A, and FIG. 5 illustrates a partial perspective view showing a state in which a vibration damping member is mounted on a support securing portion of a support.

FIG. 6A illustrates a perspective view of the sirocco fan in FIG. 3A, FIG. 6B illustrates a plan view of FIG. 6A, FIG. 7A illustrates a perspective view of the rotor in FIG. 3A, with a partial sectional view, and FIG. 7B illustrates a bottom perspective view of FIG. 7A.

FIG. 8A illustrates a perspective view of the rotor hub in FIG. 3A, FIG. 8B illustrates a bottom perspective view of FIG. 8A, and FIG. 9 illustrates a perspective view of a 'C' shaped magnet.

FIG. 10 illustrates a perspective view of the stator in FIG. 3A, FIG. 11 illustrates a disassembled perspective view of FIG. 10, and fig. 12 illustrates a perspective view of a helical core, such as an enlarged view of the core in FIG. eleven.

Ventilation apparatus 1 of the present invention includes an outer casing 10, a fan housing 40 secured to an interior of the outer casing 10 having air inlets 410a and 410b at the top and bottom, and a vent outlet. air in a front part, a sirocco fan 50, a centrifugal fan, mounted inside an interior of the fan housing 40, a shaft 68 attached to the sirocco fan 50, for the transmission of power from a motor to the sirocco fan 50, bearings 69a and 69b to support the shaft 68, a bracket 80 secured to an upper surface of the fan housing 40, to support the bearings 69a and 69b and a stator 65, a rotor hub 70 of an insulating material secured to an opposite end portion of a fan connection portion of the shaft 68, a rotor 60 secured to rotor hub 70 for transmission of power to shaft 68 through rotor hub 70, and stator 65 firmly mounted on bracket 80 so as to be positioned within rotor 60 to maintain concentricity with respect to rotor 60 to place a brushless DC motor 6 together with rotor 60.

ES 2 395 904 T3

The sides of the outer casing 10 facing the air outlet and the air inlets 410a, and 410b of the fan housing 40 are open, and a grill G is mounted on an open side facing the air outlet of the fan housing. 40.

On the other hand, the fan housing 40 includes an air inlet 410a at a bottom, and an air inlet 410b at a top spaced at a distance from the bottom, which can also be used as an opening for mounting a motor, and an air outlet in one of the side walls connecting the lower part and the upper part and surround the sirocco fan 50. It is preferable that the fan housing 40 is formed of metal foil.

On the other hand, the sirocco fan 50 is mounted on the fan housing 40 in such a way that an axis of the fan housing 40 is eccentric with respect to an axis of the fan 50. That is, the axis of the fan housing 40 does not coincide. with the axis of the sirocco fan 50, but is spaced from the axis of the sirocco fan 50. Therefore, as can be seen in FIG. 3A, the left and right side spaces between the fan housing 40 and the sirocco fan 50 differ.

Between the outer casing 10, and the fan housing 40, there is a support bracket 11 to support the fan housing in the outer casing 10. Although it is preferable that the support bracket 11 extends from the outer casing 10 as a unit. and attached to the top of the fan housing 40, the support bracket 11 can be positioned between the outer casing 10 and the fan housing 40 as a separate member.

The fan housing 40 has a stiffening forming portion 430 substantially along a circumferential direction with a varying width with an upper surface of the fan housing 40 becoming larger as it reaches a wider portion (a front side of outer casing) (see FIG. 1).

On the other hand, there are reinforcing rings 44 mounted respectively on the air inlet 410a at the bottom of the fan housing 40 and the air inlet 410b at the top of the fan housing 40 which also serves as a mounting opening for motor, to guide the air flow introduced into the fan.

Although a case of the reinforcing ring 44 is shown as an example, in which each of the reinforcing rings 44 includes, as separate members, a fixing surface 440a for fixing to a periphery of the upper or lower air inlet. 410a or 410b of the fan housing 40, and a guide 440b of predetermined curvature to guide an air flow, the reinforcing rings 44 can be formed as a unit with the fan housing 40. In this case, the reinforcing ring 44 has a thickness that becomes thinner compared to the other portion the further it advances towards one end.

On the other hand, with reference to FIGS. 3A, 3B, and 4, the bracket 80, preferably of a cast metal such as aluminum, includes a bearing housing portion 82 having shaft support bearings 68 69a and 69b, as ball bearings, mounted thereon, bracket securing portions 86 each extended outward in a radial direction from bearing housing portion 82 to secure bracket 80 to the top of fan housing 40, and a stator securing portion 65 formed so as to join the support securing portions 86 to form a surface for securing the stator 65 thereto.

That is, the bracket securing portion 86 of the bracket 80 has a tripod shape.

In addition, the bracket 80 is required to curve upward toward the top of the fan housing 40 such that the ends of the bracket securing portions 86 are positioned above a stator attachment surface, to position the minus the stator fixing surface of the bracket inside the fan housing 40 when the bracket is mounted to the fan housing 40.

The bracket 80 has reinforcing ribs 88a to reinforce a strength of the bracket securing portion 86, preferably also connected to the stator securing portion 84, and an outer circumferential surface of the bearing housing portion 82.

Bracket 80 and stator 65 have locating projections and locating holes 842 respectively formed in correspondence with each other to align the concentricity of bracket 80 and stator 65 when attaching stator 65 to bracket 80. In more detail, the stator securing portion 84 of bracket 80 has

ES 2 395 904 T3 the positioning holes 842 for fixing a fixing position of the stator 65, and the stator 65 facing the stator securing portion 84 has the positioning projections (see 656b in FIG. 10). Of course, positioning projections can be formed in the bracket, while positioning holes can be formed in the stator insulator.

On the other hand, the stator securing portions 84 of the bracket 80 have through holes 844 to improve the cooling capacity of the motor.

Of the steps 822a and 822b on an inner circumferential surface of the bearing housing portion 82, the step 822a in a lower portion is 1-shaped to support an upper end of the lower bearing 69a of bearings mounted on outer circumferential surfaces of the shaft 68, and steps 822a and 822b on an inner circumferential surface of bearing housing portion 82, the step 822b in an upper portion is L-shaped to support a lower end of the upper bearing 69b of the bearings mounted on outer circumferential surfaces of the shaft 68.

The shaft 68 within the bearing housing portion 82 for transmission of power from the rotor 60 to the fan housing 40 may have positioning steps in an upper portion and a lower portion of an outer circumferential surface to position the lower bearing. and the upper bearing on the shaft 68.

With reference to FIGS. 3A, 3B, and 5, it is preferable that vibration damping pads 46 are provided on the contact surfaces of the fan housing 40 and the reinforcing rings 44.

In more detail, the vibration damping pads 46 are mounted between the fixing surfaces 440a of the reinforcing rings 44 and peripheral surfaces of the air inlets 410a and 410b of the fan housing 40 in contact with them, to interrupt the transmission of motor vibration to fan housing 40.

A damping member 90 is provided between the bracket securing portions 86 of the bracket 80 and the fan housing 40.

With reference to FIG. 5, the vibration damping member 90 includes a body portion 920a in contact with the fan housing 40, and a head portion 920b to be forcibly inserted through a vibration damping member securing hole 866 in the support securing portion 86 and retained in the support securing portion 86. There is a through hole 930 through the body portion 920a and the head portion 920b.

It is preferable that a metal cover clamp 95, such as sheet steel, is positioned over the head portion 920b of the vibration damping member 90 to avoid damage to the vibration damping member 90 caused by the clamping force in a fixing member, such as a bolt 15d, passed through vibration damping member 90 at the time bracket 80 is secured to fan housing 40.

The cover clamp 95 is a horseshoe shaped piece of steel to cover the head portion 920b.

That is, the vibration damping member 90 is secured when a neck portion between the body portion 920a and the head portion 920b engages an edge of the vibration damping member securing hole 866 when the head portion 920b is forcibly pushed through the vibration damping member lock hole 866 in the support lock portion 86. In this state, after the cover clamp 95 is positioned on the head portion 920b, the bolt 15d is passed through the through hole 930 in the cover clamp 95 and the vibration damping member 90, and is fixed to fan housing 40, to secure bracket 80 to fan housing 40.

With reference to FIGS. 3A, 3B, 6A, and 6B, sirocco fan 50 includes main plates 54 disposed within an interior of the fan along a circumferential direction thereof to connect blades 52, each having a bushing 56 in a central portion of the fan. same to couple shaft 68 to sirocco fan 50.

At a lower end and an upper end of the blades 52, there are containment plates 53a and 53b to hold the blades together to prevent the blades from shaking in rapid fan rotation and noise caused from

ES 2 395 904 T3 that mode.

The bushing 56 includes a disc-shaped base portion 560a in close contact with the surface of a main plate 54, and a hub portion 560b projecting from a central portion of the base portion 560a in an axial direction, and having a shaft insertion hole 68 in the central portion.

The hub 56 has two pieces, which are riveted with rivets 58 or fixed with screws in a state that the two pieces are installed in close contact on opposite sides of the main plate 54.

The main plate 54 is mounted closer to the motor with reference to the middle of a length of the sirocco fan 50. This is because, from the air inlets 410a and 410b of the fan housing 40, a rate of Air flow through air inlet 410a opposite a side on which the engine is mounted is higher.

It is preferable that the main plate 54 is positioned such that, in a case where a total length of the sirocco fan 50 between two ends of the fan is divided into two lengths with reference to the main plate 54, a ratio of a length short from the main plate 54 to one end of the fan with respect to a long length from the main plate 54 to the other end of the fan falls within a range of 1: 1.3 ~ 1: 3.

The hub portion 560b of the bushing 56 has at least one bolt fixing hole 560c on an outer circumference, and the shaft 68 has a flat section 685 on an outer circumference of an end portion to apply a compression force of the past bolt 15f through, and attached to bolt fixing hole 560c in assembly.

In assembly, when the compression force of the bolt is applied to the flat section 685, the sirocco fan 50 is secured to the shaft 68 rigidly enough to rotate as a unit.

With reference to FIGS. 3A, and 3B, although it can be seen that the rotor hub 70 is attached to the shaft 68 and the rotor frame 60a in a state in which the rotor hub 70 is positioned below the rotor frame 60a, the hub The rotor hub 70 can be joined with the shaft 68 and the rotor frame 60a in a state that the rotor hub 70 is positioned above the rotor frame 60a.

On the other hand, with reference to FIGS. 8A and 8B, the rotor hub 70 includes a tooth portion 72 having a central portion for insertion and engagement of the shaft 68 therewith, and a joint portion 74 extending from a circumference of the tooth portion 72 at a radial direction to join with the rotor frame 60a.

The attachment portion 74 of the rotor hub 70 has a plurality of positioning projections 740 formed as a unit to be inserted into the positioning holes 602g in the rotor frame 60a in assembly.

The attachment portion 74 of the rotor hub 70 also has fixing holes 742 for fixing to the rotor frame 60a with bolts.

The tooth portion 72 and the attachment portion 74 of the rotor hub 70 have reinforcing ribs 76a and 76b, respectively.

The shaft 68 has a serrated edge 680 on an outer circumferential surface of the upper end portion, and the rotor hub 70 has a serrated edge 720 on an inner circumferential surface of a central hole in the tooth portion 72, for engagement with serrated edge 680 of shaft 68.

That is, the rotor hub 70 is fixed to the rotor frame 60a with fixing members such as bolts or the like passed through the fixing holes 742 in the joint portion 74, and the shaft 68, inserted through the portion center of the tooth portion 68 and connected to the rotor hub 70 with the toothed edge gear, is fixed to the rotor hub 70 with the bolt 15b inserted into the fixing hole at an end portion thereof.

On the other hand, the rotor hub 70 is formed of synthetic resin having a different vibration mode than the rotor frame 60a of sheet steel.

With reference to FIGS. 3A, 3B, 7A, and 7B, rotor 60 includes a rotor frame 60a, and magnets 60b mounted within an interior thereof, wherein rotor frame 60a is preferably formed of sheet steel bearing in mind

ES 2 395 904 T3 counts productivity and formability.

However, the material of the rotor frame is not limited to the above, but the rotor frame 60a can be formed by injection molding, or a steel sheet and injection molding covering an exterior of the steel sheet. .

The rotor frame 60a includes a lower portion 602 of a substantially disk shape, and a side wall portion 604 extending in a substantially vertical direction from a circumference of the lower portion 602, wherein the side wall portion 604 has a curved portion 604a formed along a circumferential direction having a seating surface to support magnets 60b mounted on an inner surface thereof, and the lower portion 602 has a hub portion 602a having a through hole 602b in a central portion to allow passage of fixing members, such as bolts 15b, to fix the rotor 60 to the shaft 68.

The lower portion 602 of the rotor frame 60a also has fixing holes 602h in correspondence with the fixing holes 742 in the attachment portion 74 of the rotor hub 70.

On the other hand, the lower portion 602 of a substantially disk shape, and the side wall portion 604 extended in a substantially vertical direction from a circumference of the lower portion 602 of the rotor frame 60a are formed as a unit by pressing, if the rotor frame 60a is formed of a steel sheet.

In this case, the side wall portion 604 has an open end edge curved in a radial direction outward for the first time, and curved downward again toward the lower portion 602 for the second time.

The curved portion 604b at the open end edge of the side wall portion 604 of the rotor frame 60a improves the rigidity of the side wall portion 604, and prevents distortion of the rotor produced at a moment of rapid rotation, and noise caused that way in advance.

The rotor frame 60a has a plurality of cooling fins 602c around the hub portion 602a in a radial direction to blow air towards the stator 65 to cool the heat generated in the stator 65 when the rotor 60 rotates. The cooling fin 602c has a predetermined length in a radial direction.

On the other hand, the cooling fins 602c are formed by cutting and partial bending, such that the cooling fins 602c are directed towards the opening, and the through holes 602d formed by the cutting and partial bending serve as ventilation holes.

The cooling fin 602c bends 90 ° with respect to the lower portion 602 such that the cooling fin 602c is directed toward the opening of the rotor 60.

The rotor frame 60a has raised portions 602e in the lower portion 602 between adjacent cooling fins 602c to reinforce the rotor frame 60a, each with a drain hole 602f to drain water.

On the other hand, as shown in FIG. 7A, magnet 60b has an arc shape, or as shown in FIG. 9, or the magnet 60b has a 'C' shape (referring to a substantial 'C' shape of a curved portion).

With reference to FIGS. 3B, and 10 to 13, the stator 65 includes an annular helical core 65a of a multilayer structure of a steel sheet with 'T's 654a and a base portion 652a wound in a helix from a lower layer to a layer top, an insulator 65b that surrounds the core to make the insulation, and having a joint portion 655b projecting towards an internal side of the core with fixing holes for fixing the stator 65 to the fan housing 40 with fixing members, such as bolts 15c, and coils 65c wound on the 'T's 654a.

In this case, the stator joining portion 655b has more than three projections towards the inner side of the core, and has a height of more than 20% of a total core height.

With reference to FIG. 11, this is because the height of more than 20% of a total height of the core of the joint portion 655b of the insulator is adequate to resist motor vibration if the core has no other joint portion.

ES 2 395 904 T3

On the other hand, the joint portion may have metal tubes 65d, or instead of the metal tubes 65d, spring pins (not shown) each having a longitudinal incision to have a radial direction elasticity, respectively inserted into the holes of attachment portion fixation 655b.

The helical core 65a has a multilayer structure wound in a helix from a lower layer to an upper layer, wherein a plurality of Ts 654a project outwardly in a radial direction from the base portion 652a, and the base portion 652a has trapezoidal or rectangular grooves 656a for stress reduction when winding the core.

Multiple layers of the helical core 65a are held together with rivets 657a passed through through holes in the base portion 652a, and a winding start portion and a winding end portion of the helical core 65a are welded to predetermined portions of the base portion in contact therewith, respectively.

With reference to FIG. 11, the insulator 65b has separate upper and lower pieces to surround the core when the upper and lower pieces are held together.

In a case where the insulator 65b is manufactured as separate upper and lower parts, the insulator 65b includes an upper part of the insulator 650b secured to an upper side of the core, and a lower part of the insulator 651b secured to a lower part of the core. core to cover the bottom.

On the other hand, the insulator 65b can be manufactured, not as the upper and lower parts separately, but manufactured by molding at the same time, when the core is processed in a state where the core is inserted into a synthetic resin.

The operation and blowing process of the above-mentioned ventilation apparatus of the present invention will be described.

When the rotation of the rotor 60 is caused when a current flows to the coil 65c of the stator of the brushless DC motor 6 in a sequence through an electrical connection socket housing assembly 300, the shaft 68 meshes to the bushing of rotor 70 joining with rotor 60 with broken serrated edge, to transmit power to sirocco fan 50 through shaft 68 to rotate sirocco fan, causing air to be drawn in through upper and lower inlets 410b and 410a at the top and bottom of fan housing 10, and discharged through outlet O at the front of outer casing 10.

In detail, when current is applied to the coil 65c of the stator 65 in the brushless DC motor 6, an electromagnetic force is generated between the stator 65 and the magnet 60b, when a sensor keeps detecting a position of the magnet 60b, to apply the current to the coils 65c of the stator 65 in succession, so that the electromagnetic force keeps generating between the stator 65 and the magnet 60b, to rotate rotor 60 having magnet 60b secured thereto along with shaft 68 attached to rotor 60, thereby transmitting a rotational force to sirocco fan 50.

In this case, since the brushless DC motor 6 has a wide range of stable torque characteristic, the brushless DC motor 6 can, not only be operated at various rotational speeds, but also reduce noise already That brushless DC motor 6 realizes stable operation, and furthermore, reduce power consumption.

As a sensor for motor control, a Hall 200 sensor is used.

In summary, the ventilation apparatus 1 of the present invention discharges air in a circumferential direction after sucking the air through the lower air inlet 410a of the fan housing 40 and sucking in a portion of the air through the air inlet. upper 410b of the fan housing 40 when the sirocco fan 50 is rotated by the brushless DC motor 6, and the discharged air is guided by the fan housing 40, until air is discharged through outlet O in outer casing 10.

On the other hand, the ventilation apparatus of the present invention has the following advantages.

The use of the brushless direct current motor 6 which is stable at most rotational speeds and has a high efficiency when driving the fan of the ventilation apparatus 1 enables the motor to be driven.

ES 2 395 904 T3 brushless direct current while varying rotational speeds widely, and reduce noise and power consumption as stable and high-performance operation can be realized in a full rotational speed range.

Furthermore, by effectively mounting and securing the brushless DC motor 6 on one side of the fan housing having a low suction air flow rate by using a separate bracket 80, with a portion of the motor brushless direct current sunk in the fan housing 40, the ventilation apparatus 1 of the present invention has an advantage of reducing an overall size of the ventilation apparatus.

The direct motor coupling type ventilation apparatus 1 enables noise, failure occurrence, and power consumption to be reduced, and the reliability of the product is improved since the bearing housing is formed of metal, such as aluminum, which it has no thermal distortion.

Since the rotor 60 of a steel plate of the ventilation apparatus 1 allows it to be formed by pressing, with good formability, and a short period of manufacturing time, productivity is improved.

Ventilation apparatus 1 of the present invention allows for easy fabrication of rotor 60 since side wall portion 604, extending vertically from a circumference of lower portion 602 of rotor frame 60a, has a curved portion 604a formed along of a circumferential direction having a magnet seating surface 60b, which allows secure support of the magnets 60b when the magnets 60b are attached to the inner surface of the rotor.

Furthermore, the plurality of radial cooling fins 602c each with a predetermined length around the hub portion 602a of the rotor frame 60a blow air towards the stator, to cool the heat generated in the stator 65.

The cooling fins 602c are formed to be directed toward the rotor opening 60 by cutting and partial bending, and the through holes 602d formed by the cutting and partial bending serve as vents.

The easy formation of the rotor 60 from a steel sheet by means of a single pressing allows to shorten a time required for the manufacture of the rotor, which improves productivity.

The first curvature in the radial outward direction and the second downward curvature of the end of the side wall opening 604 of the rotor frame 60a improves the strength of the rotor frame 60a, to prevent distortion of the rotor 60 and the occurrence of noise. brought about in that way.

Along with this, raised portions 602e between adjacent cooling fins 602c in lower portion 602 of rotor 60 enhance an overall strength of rotor 60, and drain holes 602f in raised portions 602e allow water drainage to a exterior of the engine.

The rotor hub 70 of the present invention of an injection molded synthetic resin having a different vibration mode than the rotor frame 60a of sheet steel allows to dampen the vibration of the rotor 60 in the transmission to the shaft 68.

The helical core 65a that allows easy winding prevents waste of material, and improves ease of manufacture, and the rigidity of the stator securing portion 84 of the bracket 80 is increased to reduce noise and vibration, to improve mechanical reliability and extend a shelf life.

That is, since the grooves 656a in the base portion 652a of the helical core 65a in the stator 65 reduce the stress when winding the core, winding can be easily done with low power.

Furthermore, with reference to FIG. 11, the height of the joint portion 655b of the synthetic resin insulator 65b of more than 20% of a total core height allows adequate rigidity even if no metal core is present in the joint portion, to avoid breakage of the joint portion 655b caused by the vibration produced during the operation of the engine.

Particularly, it is preferable that the joint portion 655b has a height equivalent to a total height of the core.

ES 2 395 904 T3

Although the height of the joint portion 655b may be greater than the total height of the core, it is preferable that the height of the joint portion 655b is set not to exceed twice the total height of the core since an excessive height of the core joining portion 655b increases an overall height of a drive unit of the ventilation apparatus, which is not favorable for making a compact ventilation apparatus.

Positioning projections 656b on attachment portion 655b paired with locating holes 842 on bracket 80 allow easy attachment of stator 65.

That is, the present invention makes it possible to ensure an insulation capacity and reduce the transmission of vibration from the rotor to the shaft 68 due to the synthetic resin rotor hub 70 having a different vibration mode than the rotor frame 60a, as well as not only a rigid securing of the stator 65 to the support 80, but also effective maintenance of the concentricity of the stator.

The ventilation apparatus 1 of the present invention allows easy and low cost manufacturing since the fan housing 40 is formed of a metal sheet that is resistant to heat, and to light.

Furthermore, the ventilation apparatus 1 of the present invention does not have thermal distortion even at high temperature since the support 80, bearing support means, is formed of metal, such as aluminum.

Also, the ventilation apparatus 1 of this embodiment can improve the performance of a fan since the brushless DC motor 6 is mounted on one side of the air inlet 410b which has a relatively low suction flow rate. of the air inlets 410a and 410b of the fan housing 40, which allows, not only to minimize a suction flow resistance, but also a high performance stable operation.

On the other hand, FIG. 17 illustrates a perspective view of another embodiment of a support 80 'having a basic configuration identical to that of FIGS. 4A and 4B, even if a shape thereof is slightly different from FIGS. 4A and 4B.

In this case the reinforcing ribs are different from the reinforcing ribs in FIGS. 4A and 4B. When compared with FIGS. 4A, and 4B, it can be seen that a position of the reinforcing rib 88a is different.

It can be seen that, while FIGS. 4A and 4B illustrate a case where only one reinforcing rib 88a is formed on a center line of one surface of each of the stator securing portions 84, FIG. 17 illustrates a case in which the reinforcing ribs 88a are formed on opposite sides of the surface of each of the support securing portions 86.

Furthermore, although no detailed example is shown, the bracket may include only a bearing housing portion 82 in a shaft support bearing interior, and a stator securing portion 84 extended in a radial direction from the housing portion. of bearings 82 to secure both the bracket on an upper surface of the fan housing 40, and the stator on an opposite side thereof.

That is, this case is a case where the stator securing portion 84 extends to the bearing securing portions, such that the bearing securing portions 86 do not have a radius shape, but a radius shape. disk.

On the other hand, FIG 13 illustrates a perspective view of another example of a stator applicable to the present invention, and FIG. 14 illustrates a perspective view of a split core, as an example of the core structure in FIG. 13. In the case of stator 65 'in FIG. 13, instead of the helical core 65a, a split core is used.

The split core 65a 'is manufactured by forming core pieces each split along a circumferential direction into a sheet steel mother workpiece having the Ts 654a and the base portion 652a, and connecting the core pieces with solder.

'W' in the drawing indicates a welded portion.

ES 2 395 904 T3

In this case, although an insulator 65b of core pieces held together is shown, the core can be insert molded such that the insulator completely surrounds the core.

On the other hand, FIG. 15 illustrates a perspective view of another example of a stator applicable to the present invention, and FIG. 16 illustrates a perspective view of a one-piece core, as an example of a core structure in FIG. 15, wherein the stator 65 '' in FIG. fifteen illustrates a case of a one-piece core 65a '' of a steel sheet with the Ts 654a and the base portion 652a, which does not have any cut along a circumferential direction, instead of the helical core 65a, or the core divided. The one-piece core is illustrated in FIG. 16.

Although FIG. 15 illustrates a case where the core is insert molded such that the insulator completely surrounds the core, the insulator of core pieces held together can be used as shown in FIG. 14.

On the other hand, in the aforementioned embodiment, the sirocco fan 50 is fixed to the shaft 68 so that it is rotatable with the shaft 68 when an end of a bolt passed through the bolt fixing hole 560c is pressed onto the shaft. flat section on the outer circumference of the end of the shaft 68. However, not only such a fixing structure allows the fixing of the sirocco fan 50 to the shaft 68.

Although not shown, in the same configuration principle in which the rotor hub 70 and the shaft 68 passed through a central portion thereof are held together with the bolt 15b, the sirocco fan 50 and the shaft 68 can be held together with a bolt that passes through a central portion of the main plate 54 of the sirocco fan 50, and one end of the shaft 68.

An application example of the ventilation apparatus 1 to the front suction / discharge type air conditioning outdoor unit will be described with reference to FIGS. 18 ~ 20 together with the drawings of the aforementioned embodiment.

FIGS. 18 ~ 20 illustrate a perspective view with a partial cutaway view, a disassembled perspective view, and a front view showing the installation states of the front suction / discharge type air conditioning outdoor unit, respectively.

With reference to FIGS. 18 ~ 20, the front suction / discharge type air conditioning outdoor unit includes a casing 10 'having an open front and various components contained therein. The front suction / discharge type air conditioner outdoor unit is installed in a rectangular space on an exterior wall 2 of a residential or commercial building.

In detail, firmly mounted on an inner wall of the space on an outer wall 2 of the building is an outer frame 4, firmly mounted on an inner of the outer frame 4 is an inner frame 5 (depending on the cases, the outer frames and internal 4, and 5 can be formed as a unit), across an intermediate part of an inner area of ​​the inner frame 5 there is an intermediate insulation bar 9 for dividing the inner area of ​​the inner frame 5 into an inlet area 7a and an outlet area 7b in the upward direction / downwards, mounted in each of the areas is a plurality of louver blades 8 for suction / discharge of air between the gaps of the blades 8, Mounted in close contact on an inside of the inner frame 5 is the outdoor unit, and between the inner frame 5 and the outdoor unit is a sealing member 'S' to prevent air leakage and damp vibration.

The thus installed front suction / discharge type air conditioning outdoor unit includes an 'I' inlet and an 'O' outlet on a lower side and an upper side of the open front part of the casing 10a, a compressor (not shown) and a heat exchanger 20 integrated in an internal side of the inlet 'I' for the compression and condensation of refrigerant, and a ventilation apparatus 1 integrated in an internal side of the outlet 'O' to blow air, wherein the ventilation apparatus 1 includes a sirocco fan 50, a type of centrifugal fan, inside a fan housing 40 firmly mounted on an internal side of the outlet 'O' as a fan, and a current motor Continuous brushless 6 connected to the sirocco fan and firmly mounted in the fan housing 40 with a separate bracket 80 to rotate the sirocco fan 50.

The housing 10a includes an inlet portion 11a and an outlet portion 11b in correspondence with the inlet area 7a and the outlet area 7b on internal sides of the inlet 'L' and outlet 'O' respectively, and preferably grills G at the 'I' inlet and 'O' outlet on the front open to prevent infiltration of

ES 2 395 904 T3 large foreign substances, insects, animals, and the like.

By way of reference, it can be noted that the casing 10a is slightly different from the outer casing 10 of the ventilation apparatus described above, since in the casing 10a not only the front suction is taken into account, but also the installation of a heat exchanger, and the like in an interior thereof.

Furthermore, the casing 10a has various units, such as the compressor, and the heat exchanger 20 fixedly mounted on the inlet portion 11a and the outlet portion 11b with various shapes of clamps (not shown), and the casing 10a is mounted accordingly. such that the open front of the housing 10a is in close contact with the sealing member 'S' on an interior of the inner frame 5.

Of course, the compressor and the heat exchanger 20 are mounted so that they are connected to the heat exchanger (not shown) in the indoor unit with refrigerant pipes, the other expansion means (not shown), such as a capillary tube or an expansion valve, they are also mounted so that they are connected between the heat exchanger of the outdoor unit and the indoor unit with refrigerant pipes. The above configuration allows the refrigerant to cool a space in which the indoor unit is installed when the refrigerant is compressed, condensed, expanded, and evaporated while the refrigerant circulates through a refrigeration cycle with the compressor, the heat exchanger. outdoor side heat 20, the expansion means, the indoor side heat exchanger.

The outdoor heat exchanger 20 has a plurality of 'U' curved refrigerant ducts with a plurality of cooling fins 602c installed therein, the compressor mounted on an inner side, and a control box 30 on a rear side. to control the operation of various units in the outdoor unit.

The ventilation apparatus 1 is fixedly mounted on the heat exchanger of the outdoor unit 20, in which, after the sirocco fan 50 and the brushless DC motor 6 are connected to each other, the sirocco fan 50 and brushless DC motor 6 are fixedly mounted inside fan housing 40 with bracket 80, and the fan housing 40 is fixedly mounted on the heat exchanger of the outdoor unit 20 so as to be positioned at the outlet 11b of the housing 10a with a separate clamp (not shown).

In more detail, the sirocco fan 50 is a kind of centrifugal fan that sucks air in an axial direction and discharges air in a circumferential direction, and has a relatively higher air flow rate than an axial fan.

The sirocco fan 50 has a structure equivalent to the aforementioned embodiment.

Next, the fan housing 40 has air inlets 410a and 410b at the top and bottom to draw air passed through the outdoor side heat exchanger 20 in an axial direction of the sirocco fan 50, preferably with rings. reinforcement 44 at the inlets 410a and 410b respectively to guide the air, and an air outlet to discharge the air in a circumferential direction of the sirocco fan 50.

The air outlet in the fan housing 40 is in communication with the outlet 'O' in the housing 10a.

On the other hand, the brushless DC motor 6, which uses, not a brush, but a driving circuit in the AC to DC conversion, does not produce sparks or gas explosion hazard since the DC motor without Brushes 6 has no brush, realizes stable drive in most of the speed range, and has high performance in 70 ~ 80% range. In detail, the brushless DC motor 6 includes a shaft 68 for the transmission of energy to the sirocco fan, a stator 65, a rotor 60, and magnets 60b to generate a rotating force by electromagnetic force to drive the shaft 68, and a Hall sensor 200 for detecting a position of the rotor 60, to monitor a current supplied thereto.

Particularly, the brushless DC motor 6 is fixedly mounted on one side of the upper air inlet 410b of the fan housing 40 having a relatively low flow rate with the bracket 80 to reduce the suction flow resistance.

In more detail, shaft 68 is rotatably supported in bracket 80 with bearings 69a and 69b, as ball bearings, in a state where shaft 68 is passed through bracket 80, with one end thereof attached to an upper shaft center of the sirocco fan 50 by bolting, or caulking, and the

ES 2 395 904 T3 stator 65 is fixedly mounted on bracket 80, with a predetermined gap with respect to an outer circumference of shaft 68.

Along with this, rotor 60 has an outer circumferential portion positioned around an outer circumference of stator 65, and an inner circumference portion fixedly mounted on shaft 68, wherein the rotor has a plurality of ribs, or raised portions. in a lower part extended in a radial direction for reinforcement against centrifugal force, A plurality of permanent magnets 68 are fixedly mounted on an outer circumferential portion of the rotor 60 along a circumferential direction at regular intervals to generate an electromagnetic force with the stator 65, and the Hall sensor 200 is fixedly mounted on one side of stator core 65.

Therefore, if a current flows to the coils 65c of the stator 65 in succession, the rotor 60 rotates by electromagnetic force between the current in the coil and the magnet 60b, and the rotating force of the rotor 60 rotates the sirocco fan 50 to through the tree 68.

The bracket 80 then mounts the sirocco fan 50 and the brushless DC motor 6 hung from the fan housing 40 on an interior thereof. In detail, bracket 80 includes a cylindrical bearing housing portion 72 having shaft 68 rotatably mounted therein by bearings 69a and 69b, a stator securing portion 84 formed as a unit with the housing portion. of bearings 72 at an upper end thereof for fixedly mounting the stator 65 in a state where the stator 65 is located therein, and a plurality of support securing portions 86 projecting in a radial direction from a circumference of the stator securing portion 84 at regular intervals and attached to a periphery of the air inlet 410b in the upper part of the fan housing 40.

The bearing housing portion 72 of a cylindrical shape with a length shorter than the shaft 68 has the bearings 69a and 69b to rotatably support the shaft 68, and the stator securing portion 84 has a plurality of positioning holes. 842 and fixing holes 846 for fixing screws in a state where the stator 65 is inserted into an upper surface thereof.

Along with this, it is preferable that the bracket 80 has three bracket securing portions 86 around the bearing housing portion 82 and the stator securing portion 84 at 120 ° intervals to distribute the load therein, and a reinforcing rib 88a is formed between the bearing housing portion, the stator securing portion 84, and the support securing portion 86 to support a bottom of the stator securing portion 84 and the support securing portion 84 to reinforce a strength of the support securing portion 86, and it is more preferable that a plurality of complementary reinforcing ribs 88b and 88c are formed on the tops of the support securing portions, as well.

Particularly, the support securing portions 86 project in a radial direction from the stator securing portion 84, and have intermediate portions each more inclined upward the further it advances towards the radial direction, and horizontal end portions having a hole. 866 vibration damping member securing device. As a consequence, the bracket 80 is mounted such that the bracket securing portions 86 are attached to a periphery of the air inlet 410b in an upper part of the fan housing 40.

A process for assembling the ventilation apparatus, a main unit of the present invention, and the operation of the outdoor unit will be described.

First, the brushless DC motor 6 forms a motor assembly when the shaft 68 is rotatably mounted in the bearing housing portion 82 of the bracket 80 with the bearings 69a and 69b and the stator 65 is secured to the upper surface of the stator securing portion 84 with screws, and the motor assembly is mounted such that the shaft 68 engages a shaft center of the sirocco fan 50 in a state in which the sirocco fan 50 is positioned within the fan housing 40, and the bracket 80 is mounted in the fan housing when the bracket securing portions 86 of bracket 80 are located at, and are attached to, the periphery of the upper air inlet 410b on the upper surface of the fan housing with bolts or the like.

As a consequence, the ventilating apparatus 1 having the brushless DC motor 6 therein is fixedly mounted on the outdoor heat exchanger 20 with a separate clamp in a state in the

ES 2 395 904 T3 that the ventilation apparatus 1 is located therein, and the brushless DC motor 6 is connected to the control box 30 with cables to control the operation of the brushless DC motor 6.

Regarding the operation of the outdoor unit thus assembled, the compressor is operated in response to a signal from the control box 30, according to which the refrigerant is introduced into the indoor unit through the compressor, the outdoor heat exchanger 20, and the expansion means, and circulates along the indoor heat exchanger.

In this case, since the coolant circulates through the outdoor heat exchanger 20, and the sirocco fan 50 is driven by the brushless DC motor 6, the air sucked through the inlet 'I' in the housing 10a performs the heat exchange with the refrigerant when the air passes through the outdoor heat exchanger 20, to condense the refrigerant, and passes through the sirocco fan 50, and is discharged through outlet 'O' in housing 10a.

Of course, since the brushless DC motor 6 has a wide range of stable torque characteristic, the brushless DC motor 6 can realize stable operation at a variety of speeds, enabling the reduction of noise, and power consumption. of energy.

Accordingly, since the sirocco fan 50 which is a kind of centrifugal fan draws air in an axial direction by driving such brushless DC motor 6, most of the air passed through the heat exchanger of Exterior 20 is sucked through the lower air inlet 410a of the fan housing 40, and the remaining portion of the air is sucked in through the upper air inlet 410b, and the air is guided by the reinforcing rings 44 in the air inlets 410a and 410b to flow in an axial direction of the sirocco fan 50 and is discharged in a circumferential direction, and from there it is guided by the fan housing 40 and is discharged through outlet 'O' in housing 10a in communication with the air outlet in the fan housing.

Since the brushless DC motor 6 is mounted on one side of the air inlet 410b which has a lower air flow rate relative to the air inlets 410a and 410b of the fan housing 40, it cannot only be minimize a suction flow resistance, It can also improve the fan performance and heat exchange performance as the brushless DC motor realizes stable operation at high performance.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope of the invention. Thus, the present invention is intended to cover modifications and variations of this invention as long as they fall within the scope of the appended claims.

Industrial applicability

As described, the front suction / discharge type air conditioning outdoor unit of the present invention enables to drive the brushless DC motor while varying a motor speed widely, and reduce noise, and power consumption. power, since the brushless DC motor is applied to drive the fan, which can realize stable operation at most rotation speeds and has high performance.

Furthermore, the front suction / discharge type air conditioning outdoor unit of the present invention allows, not only effective safe mounting of the brushless DC motor in the fan housing, since the brushless DC motor it is fixedly mounted on one side of the fan housing that has a lower suction flow rate by using a separate bracket, but also to reduce an overall size of the ventilation apparatus by mounting a sunken brushless DC motor portion in an interior of the fan housing.