Heating boiler with heat exchanger and air suction and gas outlet lines for coercive execution of suction and/or discharge across blower or fan unit

(54) NAME Combustion heater for air (56) PUBLICATIONS QUOTED:

JP A 55 110 818 (F23L 17/00), JP A 8 105 658 (F24H 3/04), JP A 51 136 350 (F24C 9/00), US Ä 4,262,608 (110/162) (57) SUMMARY :

The present invention relates to an internal combustion heater having a fan part (20) provided with a drive motor (21), an intake fan (22) fixed to the axis of rotation of the drive motor (21) and arranged on an intake line (12, 13) for forced suction of air into the room. or from the outside and an exhaust fan (23) fixed to the axis of rotation of the drive motor (21) and arranged on an exhaust pipe (60), forcing a blowout gas to the outside. Accordingly, the air in the room or from the outside is forced in through the suction line (12, 13) by means of the suction fan (22) and the exhaust gas is forced out through the exhaust line (60) by means of the exhaust fan (23). In this way, the flow of air is kept constant in all intake, combustion and exhaust lines (12, 13, 44, 45, 60).

<img file="SE522320C2_D0001.tif" />

The numbers in brackets indicate international identification code, INID code. Letters in clamps indicate international document code.

522 320

SUMMARY

The present invention relates to an internal combustion heater having a fan part (20) provided with a drive motor (21), an intake fan (22) fixed to the axis of rotation of the drive motor (21) and arranged on an intake line (12, 13) for forced suction of air into the room. or from the outside and an exhaust fan (23) fixed on the axis of rotation of the drive motor (21) and arranged on an exhaust pipe (60), forcing a blowout gas to the outside. Accordingly, the air in the room or from the outside is forced in through the suction line (12, 13) by means of the suction fan (22) and the exhaust gas is forced out through the exhaust line (60) by means of the exhaust fan (23). In this way, the flow of air is kept constant in all intake, combustion and exhaust lines (12, 13, 44, 45, 60).

522 320 /

1st Device area

The present device relates to a combustion heater for air and more particularly to a combustion heater which has improved air intake and exhaust air functions.

2nd Description of the technology area

As an example of the prior art reference is made to US-A-4,262,608, JP 55 110816, JP-A-08105658 and JP-A-51-136350.

As is well known, heating devices are divided into different types according to the nature of the heat source, installation method, places to be installed on, suction and exhaust methods, water supply methods, designs of a heat exchanger etc.

Fig. 1 shows, for example, a view of a conventionally used upward combustion heater with an exhaust fan part. As shown, the conventional upward combustion heater has a flange battery 93a, in which air is sucked in from the outside while a blowout gas is forced out on the outside by means of a blowout fan part 20.

In operation, if a blower fan 20 drive motor 21 is running, a blower fan 23 is rotated which is fixed to the drive shaft of the drive engine 21 with the result that the air in a combustion chamber A forces flow to a blowout line 60. Accordingly, the pressure in the exhaust pipe 60 is higher than the atmospheric pressure, while a counterpressure thereto is on the combustion chamber A, a burner 30, an intake pipe 13 and an intake part 11, so that air from the outside is sucked into the intake part 11 through inlet bores 11a and then flows the combustion chamber A via the intake line 13 and the burner 30. Thereafter, the air forced to the exhaust pipe 60 flows through the exhaust fan 23 and is finally blown out on the outside via the outlet bore 60a of the exhaust pipe 60.

When fuel is injected from a fuel supply line 70 via a nozzle 80a of a fuel injection part 80 under the above stated condition, the injected fuel is mixed.

522 320 with the air inside the burner 30. Then, the resulting mixed gas is delivered to the combustion chamber A via the flame burner of the burner.

If an ignition device (not shown in the drawing) is in operation at this time, the mixed gas emitted by the flame burner burner ignites.

On the other hand, when water to be heated is forced into a heat conduit by means of a circulation pump 100, the low temperature water to be heated flows from the lower part of a heating element (not shown in the drawing) to a heat exchanger. 93 through a water inlet tube 91 and then returned to the lower portion of the heating element through a water outlet tube 92. As a result, the low temperature water in the heat exchanger 93 with the flange battery 93 a is heated to a high temperature by the high temperature combustion gas in the combustion chamber A and the low temperature water to be heated from the water inlet tube 91 flows into the heat exchanger 93 and heated to a high temperature. Thereafter, the heated water is returned to the lower portion of the heating element through the water outlet tube 92.

Fig. 2 shows, for example, another view of a conventionally used upward combustion heater with an exhaust fan part. As shown, the conventional upward combustion heater has an internal combustion gas induction tube 45, in which air in the room is sucked in, while an exhaust gas is forced out externally by the exhaust fan part 20.

In operation, if the drive motor 21 of the exhaust fan 20 is running, the exhaust fan 23, which is attached to the axis of rotation of the drive motor 21, is rotated with the result that the air in a blow-out chamber 50 is forced to flow to the exhaust pipe 60 (see Fig. 3). the blower fan portion 20. Accordingly, the internal pressure in the exhaust pipe 60 is higher than the atmospheric pressure, while a counterpressure thereto is applied to the exhaust chamber 50, the combustion gas induction tube 45, a combustion chamber 48, an intake chamber 14 and an intake pipe 13 so that the air in the inlet duct 13 is sucked in. flows to the suction chamber 14 via the suction line 13. Thereafter, the portion of air induced to the suction chamber 14 flows directly to the combustion chamber 48 through the bore of the suction chamber 14 and the other portion flows to the interior of the burner 30 through a venturi 31 and thereafter to the combustion chamber 48 through the burner flames 30. Thereafter, the air flowing to combustion chamber 320 is transferred to the exhaust chamber 50 through the combustion gas induction tube 45 and then flows forced to the exhaust line 60 by turning the exhaust fan 23 out and finally being blown out on the outside.

When fuel is injected from the fuel supply line under the circumstances above

70 via the nozzle 80a of the fuel injection part 80 to a venturi 31 in the burner, the injected fuel is mixed with the air in the interior of the suction chamber 14. Thereafter, the resulting mixed gas is delivered to combustion chamber 48 via flame burner bores 30.

If an ignition device (not shown in the drawing) is operating at this time, the mixed gas emitted through the flame burner bores of the burner 30 is ignited.

On the other hand, when the water to be forced forced is circulated in a heat conduit by means of the circulation pump 100 (see Fig. 1), the water at a low temperature, which is to be turned from the lower part of a heating element (not shown in the drawing) to a the water chamber 46 of the heat exchanger 40 through the water inlet pipe 91 (see Fig. 1) and then returned to the lower part of the heating element through the water outlet pipe 92 (see Fig. 1). As a result, the low temperature water in the water chamber 46 of the heat exchanger 40 is heated to a high temperature by the combustion gas having a high temperature and flowing in the combustion chamber 48 and the combustion gas induction tube 45 and then returned to the lower part of the water heater element.

Fig. 3 shows, by way of example, a further view of a conventionally used upward combustion heater with an exhaust fan part. As shown, the conventional upward combustion heater has a combustion gas induction tube 45, in which air is sucked in from the outside while a blowout gas is forced out on the outside by the blower fan part 20.

In this case, an intake induction portion 11 is provided on the free end portion of the exhaust line 60, outlet bores 60a and inlet bores 1a, respectively, located on the free end of the exhaust line 60 and on the front end of the outside of the intake induction portion 11 and the intake tube 11 so that the exhaust gas is blown out on the out35 side while the air on the outside is sucked in.

Fig. 4 shows, for example, a view of a conventionally used downward combustion heater with an exhaust fan part. As shown, the conventional upward combustion heater has a combustion gas induction tube 45, in which air in the room is sucked in, while an exhaust gas is forced out on the outside by means of the exhaust fan part 20.

If the drive motor 21 for the blowout fan part 20 is running, the blower fan 23, which is fixed to the axis of rotation of the drive motor 21, is turned, with the result that the air in a blow-out chamber 50 is forced to flow to the blow-off pipe 60 (see Fig. 3) through a blow-off blow-off 20. Accordingly, the internal pressure of the exhaust pipe 60 is higher than the atmospheric pressure while applying a counterpressure thereto to the exhaust chamber 50, the combustion gas induction tube 45, an inversion induction chamber 47, a combustion tube 44 and an intake pipe 13 so that the air in the inlet duct 13 is sucked in. Thereafter, that portion of the air flows from the suction line 13 directly to the combustion tube 44 and the other portion flows to the interior of the burner 30 through the venturi 31 and then to the combustion tube 44 through the flame burner bores 30. Thereafter, the air flowing downwardly along the combustion tube 44 is reversed so that it flows upwardly through the reversing chamber 47 and is then delivered to the exhaust chamber 50 via the combustion gas induction tube 45. Thereafter, the air flowing to the exhaust chamber 50 is forced to the exhaust pipe 60 by turning the exhaust fan 23 around and thereby finally blowing out the outside.

When fuel is injected via the nozzle 80a of the fuel injection member 80 into the venturi 31 of burner 30, the injected fuel is mixed with the air in the interior of the suction chamber 14, as indicated above. Thereafter, the resulting mixed gas is delivered to the combustion chamber 48 via the flame burner burner 30.

If an ignition device (not shown in the drawing) is in operation at this time, the mixed gas emitted by the flame burner burner 30 is ignited.

The low temperature water to be heated in the water chamber 46 of the heat exchanger 40, on the other hand, is heated to a high temperature by means of the high temperature combustion gas and flows through the combustion tube 44, the inversion induction chamber 47 and the combustion gas induction tube 45 and then the heater is returned to the the water outlet tube 92 (see Fig. ΟΙ) the conventionally used combustion heater with the exhaust fan portion 20; however, as shown in Figures 1 to 4, the exhaust gas 522 is exhausted on the outside by the exhaust fan portion 20, while air in the room or from the outside is sucked in by the back pressure.

Consequently, the suction of air is not carried out evenly compared to the exhaust of the exhaust gas (i.e. the amount of air sucked in is less than expected due to the friction caused by air flow), so that the mixed gas is incompletely combusted, the thermal efficiency and an unhealthy gas are exhausted, thereby causing air contamination.

To solve the aforementioned problems, an internal combustion heater is provided with a forced feed unit 1, as shown in Figures 5 to 7, in which the air in the room or externally forced is sucked in by means of the forced feed unit 1, while the exhaust gas is blown out the outside by a negative pressure thereto.

The forced feed feeder portion 1 consists of a suction fan 1b for forcing the outside air to a combustion chamber 48 or a combustion tube 44, a drive motor 1a for rotating the suction fan 1b, an injection nozzle ld for injecting fuel which is supplied from a fuel supply and an ignition device (which is omitted in the drawing) for igniting a mixed gas.

In the conventional combustion heater, the air in the room or outside is sucked in by means of the forced feed unit 1, so that the fuel and gas are mixed properly and the combustion of the mixed gas is carried out carefully and thereby the combustion rate is increased.

The exhaust gas is not well blown out due to the friction caused by air flow with the result that the drive motor 1a of the feed part 1 is subjected to high load.

As a consequence, a large feeder part 1 with forced feed would be required and during operation it produces significant noise, which requires an additional silencer.

SUMMARY OF THE DEVICE

It is an object of the present device to provide an internal combustion heater which has improved air intake and exhaust air functions.

522 320

<img file="SE522320C2_D0002.tif" />

In order to achieve this and other objects of the present device there is provided a combustion heater with an intake line and an exhaust line for urgently performing suction and / or exhaust via a fan part, which includes: the fan portion comprising a drive motor, a suction fan fixed to the rotary shaft of the drive motor and arranged on the suction line for forced suction of air into the room or from the outside, and an exhaust fan fixed to the rotary shaft of the drive motor and arranged on the exhaust line for forced exhaust to exhaust.

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects, advantages and details of the combustion heater will be apparent from the following detailed description of preferred embodiments of the device and the detailed description refers to the drawings in which:

Figures 1 to 3 show, for example, views of conventional upward combustion heaters with an exhaust fan portion;

Fig. 4 shows, for example, a view of a conventional downward combustion heater with an exhaust fan part;

Fig. 5 shows, for example, a view of a conventional upward combustion heater with a forced feed feeder portion;

Fig. 6 shows the main parts of the feed section with forced feed in Fig. 5;

Fig. 7 shows, for example, a view of a conventional downward combustion heater with a forced feed feeder portion;

Figures 8 to 11 show, for example, views of upward combustion air heaters with a fan section for suction and exhaust, constructed in accordance with the principles of the present invention and

Figures 12 and 13 illustrate, for example, views of downward combustion heaters for air with a fan section for suction and exhaust, constructed in accordance with the principles of the present invention.

522 320

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The preferred embodiment of the present device will be discussed in detail with reference to the accompanying drawings.

Figures 8 to 11 show, for example, views of upward combustion heaters with a fan part for suction and exhaust constructed according to the principles of the present device and Figures 12 and 13 show, for example, views of downward combustion heaters with a fan part for suction and exhaust, , corresponding to those in Figures 1 to 7 are indicated by corresponding numerals and an explanation of them will be excluded.

Fig. 8 shows, for example, a view of an upward combustion heater with a fan part 20 for suction and exhaust constructed according to the principles of the present device. According to the present device, the upward combustion heater has a flange battery 93a, in which the air in the room is forced into suction while an exhaust gas is forced out on the outside by means of the fan part 20 for suction and exhaust.

Fig. 9 is a variant of Fig. 8, which shows, for example, another view of an upward combustion heater with the fan part 20 for suction and exhaust constructed according to the principles of the present device. According to the present device, the upward combustion heating device has the flange battery 93a, where the forced air is sucked in from the outside while a blowout gas is forced out on the outside by means of the fan part 20 for suction and exhaust.

Fig. 10 shows, for example, a further view of an upward combustion heater with the fan part 20 for suction and exhaust constructed according to the principles of the present device. According to the present device, the upward combustion heater has a combustion gas induction tube 45, in which air in the compartment is forced into suction while an exhaust gas is forced out on the outside by means of the fan part 20 for suction and exhaust.

Fig. 11 is a variant of Fig. 10, which shows, for example, yet another view of an upward combustion heater with the fan part 20 for suction and exhaust 20 constructed according to the principles of the present device.

522 320

According to the present device, the upward combustion heating device has the combustion gas induction tube 45, where forced air is sucked in from the outside, while a blowout gas is forced out on the outside by means of the fan part 20 for suction and exhaust.

Figure 12 shows, for example, a view of a downward combustion heater with the fan portion 20 for suction and exhaust designed according to the principles of the present device. According to the present device, the downward combustion heating device has the combustion gas induction tube 45, in which the air in the room is forced into suction while an exhaust gas is forced out on the outside by means of a fan part 20 for suction and exhaust.

A heat exchanger 40 included in the preferred embodiments of the present device comprises: a cylindrical outer container 41 with upper and lower openings closed by upper and lower covers 42 and 43; an internal combustion tube 44 and a plurality of internal combustion gas inlet tubes 45 arranged in the interior of the outer container 41, the internal combustion tube 44 being arranged eccentrically from the center of the outer container 41; a water chamber 46 arranged between the outer container 41, the upper and lower lids 42 and 43, the combustion tube 44 and the plurality of combustion gas induction tubes 45 in such a manner that it is closed when the open ends on both sides of the combustion tube 44 and the plurality of combustion gas induction tubes 45 and the lower covers 42 and 43 and an inversion induction chamber 47 arranged on the lower portion of the lower cover 43.

When the heat exchanger 40 is used, where the combustion tube 44 and the combustion gas induction tubes 45 are eccentrically arranged, the exhaust gases are blown out uniformly from the majority of the combustion gas induction tubes 45, thereby improving the heat exchange function thereof.

Fig. 13 is a variant of Fig. 12, which shows, for example, another view of the downward combustion heater with the fan part 20 for suction and exhaust constructed according to the principles of the present device. According to the present device, the downward combustion heater has the combustion gas induction tube 45, where forced air is sucked in from the outside, while a blowout gas is forced out on the outside by means of the fan part 20 for suction and exhaust.

The fan portion 20 for suction and exhaust according to the present device comprises a drive motor 21, a suction fan 22 fixed on a rotary shaft of the drive motor 21

522 320 and arranged on an inlet duct 12 or 13 for forced suction of air into the room or from the outside and an exhaust fan 23 fixed on the rotary shaft of the drive motor 21 and arranged on an exhaust duct 60 for forced out an exhaust gas on the outside.

If the drive motor 21 is running, the suction fan 22 and the exhaust fan 23, respectively, which are fixed to the rotary shaft of the drive motor 21 are simultaneously rotated, with the result that the air in the room or from the outside forced into the suction line 12 or 13 by means of the suction fan 22 and the exhaust gas forced out by means of the blowout fan 23.

In this way, the flow of air is constantly maintained in all intake, combustion and exhaust lines and the maximum amount of load on the drive motor 21 is reduced.

As will be clearly appreciated from the aforementioned, a combustion heater according to the present device has a fan section for suction and exhaust where air forced is sucked in and an exhaust gas is forced out, so that the air flow is maintained constant in all intake, combustion and exhaust air ducts, which the opening functions of the heating device.

In addition, the maximum load on a drive motor is greatly reduced, so that the noise produced by the fan part can be attenuated and a fan part which is small can be enclosed, thereby reducing the production cost.

522 320