Refrigerant compressor

Translation of description of equivalent WO 9900600 A1

Refrigerant compressor

The invention relates to a refrigerant compressor comprising a motor unit having a motor and a from an outer cooling duct connection outgoing cooling duct for the motor, and a compressor unit which dichterstufenauslaß a compressor stage with a compressor stage inlet and a supply and a from an outer suction port outgoing intake passage having which is guided as the cooling duct to the compressor stage inlet.

Such refrigerant compressors are known from the prior art. In these, the pipeline system for the suction gas to either the cooling duct connection or the suction port is to perform, depending on what type of cooling is to be realized in the motor unit.

The invention is therefore based on the object to improve a refrigerant compressor of the generic type such that the cooling with minimal structural changes is variable realized.

This object is solved in a refrigerant compressor of the generic kind according to the invention in that an outer connection unit is provided, to which the cooling duct connection and the suction port are arranged such that the connection unit has a receiving means and an adjustment, which can be used in at least two different positions in the receptacle and that by the different positions of the adjustment terminal and the said cooling channel the suction port supplied proportions of the total amount of air supplied via an outer suction gas Sauggasanschluß can be set differently.

The advantage of the invention can thus be seen that when the refrigerant compressor, a single suction is gas connection provided to the piping for the suction gas is to lead, and that depending on the application, a different type of cooling, namely differently strong suction gas the motor unit up exclusively air cooling of the motor unit, in a simple manner can be effected only by changes of the adjusting installation. This means that is adjustable by varying the proportion of the suction gas, which flows into the cooling channel terminal, and the proportion of the suction gas, which flows into the suction port, the cooling of the motor unit by the suction gas in adaptation to the respective application.

This can be regardless of what kind of cooling the motor unit is to be realized, an installation of the refrigerant compressor standardized prepare.

A particularly advantageous solution provides that are connection between the Sauggasanschluß and the suction port in one of the positions by adjusting a connection between an outer Sauggasanschluß and the cooling duct connection and in another of the positions with the adjustment member produced.

Thus, the possibility of setting a substantially exclusive suction gas and a substantially exclusive air-cooling of the motor unit is provided. The nature of the positions in which the adjusting member is to be inserted into the receptacle is specified in connection with the inventive solution, so far not described in detail. For example, it is conceivable to incorporate the adjustment in two by a translational movement differing positions. However, this has the disadvantage that the two positions of the Sauggasanschlusses also differ in their spatial arrangement.

For this reason, a particularly advantageous solution provides that the adjusting member is inserted into the receptacle in a symmetry axis of Sauggasanschlusses rotated positions. This solution has the advantage that by rotation about an axis of symmetry of Sauggasanschlusses the axis of symmetry Sauggasanschlusses itself remains available locally unchanged and thus leading to Sauggasanschluß pipelines are also to perform regardless of the type of cooling of the motor unit to the same place.

This solution is particularly favorable when the Sauggasanschluß is rotationally symmetrical, so that it is possible to realize the two positions of the adjustment by two relatively basically arbitrary twisted positions.

With regard to the type of installation of the adjustment were previously likewise no further details. It would, for example, conceivable for the terminal unit such that after opening of the compressor case the adjustment in the corresponding position can be mounted. To this cumbersome opening of the compressor housing to avoid, however, is preferably provided that the adjusting member via an outer opening of the connection unit is inserted into the receptacle.

This can be one hand, the adjustment easily replaced on the other hand bring in a simple manner in the two positions, without tampering with the refrigerant compressor are even necessary.

To date was not specified in detail how the connection unit should be designed to be self. For example, it would be conceivable to design the terminal unit so that the adjusting member establishes the connection between the Sauggasanschluß and the suction port or the coolant channel connection with an off-receiving element. A particularly advantageous solution provides that the receptacle has an interior space in which the cooling duct connection and the suction port open and that can be covered in each of the positions of the adjusting either the cooling duct connection or the suction port. This solution thus has the advantage that it is very compact, since the closure of the cooling channel port or the suction port is carried out by an engaging into the interior area of ​​the adjustment.

A particularly advantageous solution provides that the interior of the housing has an approximately cylindrical shape, as the corresponding adjusting this can easily produced in this case.

A particularly advantageous solution provides that the inner space of the receptacle extends into a recess in a partition which the cooling channel and the suction channel separates, as can be in this case, the cooling duct connection and the suction port arranged particularly favorably so that they open into the interior.

A terms of compact design particularly suitable solution provides that the adjusting member is inserted into the interior, making it a space-saving integrated in the refrigerant compressor according to the invention.

Further, in order still to achieve the same time filtering of the suction gas, it is preferably provided that the setting part accommodates a suction gas filter.

The adjustment member can be arbitrarily simply be realized if this has a cover with which either the cooling duct connection or the suction port is closed, so that the supplied via the suction gas entering the Sauggasanschluß each unsealed connection.

The cover could be formed arbitrarily complex. A particularly advantageous solution provides that the cover has an approximately semi-cylindrical shape, thereby making it possible to cover in a simple manner, the cooling duct connection or the suction connection with this, if this lead to a cylindrical wall of the interior.

To be able to fix the adjusting member in the respective position of the terminal unit is preferably provided that a flange plate is arranged on the adjustment part, which can be placed on a connection flange of the connection unit, so that on the one hand with one of said plate fixing is carried out of the adjustment and then the other hand necessary for the supply of the suction gas elements could be connected to the flange itself.

It is particularly advantageous in this case if the Sauggasabsperrventil is mountable on the flange plate of the adjusting member.

To be able to detect simultaneously on the flange plate, in which position the adjusting member is is preferably provided that the flange plate has on one side of the adjusting member a different shape than on an opposite side. Thus in a simple way, the position of the flange plate, and thus the position of the adjusting member is seen already at the differing shape of the respective opposite sides.

It is particularly favorable solution, in which the flange and the fixedly arranged at this setting part are each mounted by 180 ° to each other rotated positions on the recording into two. This solution can be personalized with Standardflanschbefestigungen which have a two-fold symmetry, realized in a simple way, the two positions of the adjustment without further special fastening measures.

Further features of the invention are the subject of the following description and the drawings illustrating one embodiment. In the drawings:

1 shows a longitudinal section through a refrigerant compressor according to the invention.

Fig. 2 is a section along line 2-2 in Figure 1 with the cooling duct connection is closed.

Fig. 3 is a section along line 2-2 in Figure 1 at the suction port is closed.

Fig. 4 is a plan view of an inventive

Adjusting in the direction of arrow A in FIG. 5;

Fig. 5 is a plan view of the adjusting member according to the invention in the direction of arrow B in FIGS. 4 and

Fig. 6 is a plan view of the adjustment member according to the invention in the direction of arrow C in Fig. 5.

An embodiment of a refrigerant compressor 10 of the invention comprises a designated as a whole with 12 an engine unit and as a whole designated by 14 compressor unit, which are both arranged in a common compressor casing sixteenth A section 18 of the compressor housing 16 encloses the designated as a whole with 20 motor, preferably an electric motor, which in turn, via a shaft 22 a in a portion 24 of the compressor housing 16 is arranged a compressor stage forming piston compressor 26 drives. The supply of refrigerant takes place via a Sauggasrohr 28, which is guided to a Sauggasabsperrventil 30th The Sauggasabsperrventil 30 is mounted to a terminal unit designated as a whole with 32, which is connected via a cooling channel port 34 with a cooling channel 36 in connection, is provided in the portion 18 of the compressor housing 16 and serves to sucked refrigerant by the engine. 20 receiving the engine compartment 38 and thus pass therethrough even through the motor 20, wherein the cooling passage 36, the sucked refrigerant takes after flowing through the motor 20 to a Kühlkanalauslaß 40th

Furthermore, from the terminal unit 32 via a suction port 44 of refrigerant a suction passage 46 is supplied which is guided to a compressor stage inlet 48th In addition, preferably also opens the Kühlkanalauslaß 40 into the intake passage 46, so that on this also flowing through the cooling channel 36 refrigerant the intake duct 46 and via this to the compressor stages inlet 48 is fed.

In the compressor stage 26, a compressing the refrigerant, which has a Verdichterstufenauslaß 50 is then discharged occurs.

As shown enlarged in Figs. 2 and 3, the cooling channel 36 and the suction passage 46 are separated by an opening provided in the compressor housing 16 wall 60 and further to the wall 60 by an outer housing wall 62 and a limited distance from the latter extending inner housing wall 64 , The wall 60 in this case runs up to the terminal unit 32 and is for forming a receptacle 66 with a Recess is provided, so that the receptacle 66 may form an interior space 68 extending between the outer housing wall 62 and the inner housing wall 64 and into which the cooling duct connection and the suction port 34 open out 44.

In the interior 68 of the receptacle 66 as a whole as 70, designated adjusting member is insertable via an outer opening 71 .What, as shown in Fig. 4 and 5, one having its outer circumferential surface to a cylindrical axis 72 about semi-cylindrically shaped covering body 74, is for its part fixedly connected to a flange 76th

The approximately semi-cylindrical to the axis 72 formed cover body 74 is thereby in the receptacle 66 can be used, that the cylinder axis 72 transversely, preferably perpendicular to the outer housing wall 62 and inner housing wall 64 extends, wherein the cover body 74 in the direction of the cylinder axis 72 having a length so that it with its flange 76 facing away from the bottom 78 in the state inserted into the receptacle 66 extends to the inner housing wall 64, preferably flush with the latter.

The cover 74 encloses, in the form of a cylinder jacket 82 and an inflow further comprises due to its only about semi-cylindrical shape or an opening 80 through which suction gas can escape from the space enclosed by the covering body 74 inflow 82nd The flange plate 76 also has an inflow port 84, which is a Sauggasanschluß over which the Sauggasabsperrventil 30 in the direction of the cylinder axis 72, suction gas can flow into the inflow space 82nd

Preferably, in the space enclosed by the cover body 74, a suction gas inflow space 82 86 is used, in such a way that the Sauggasabsperrventil from the inflow port 30 via the suction gas 84 flowing in the first suction gas 86 passes through and then enters the inflow 82nd

The cover body 74 with the flange plate 76, as shown in FIGS. 2 and 3, either so inserted into the receptacle, that the cover 74 has the cooling channel port 34 substantially covering and thus preventing the suction gas from the intake space 82 into the cooling channel 36 occurs, however, the opening 80 facing the suction port 44 so that the suction gas from the inflow space 82 can enter into the intake passage 46 via the suction port 44, as shown in Fig. 2.

However, it is also possible for the cover body 74 with the flange 76 to 72 of the cover body turned 180 ° to use the cylinder axis into the receptacle 66, so that the cover 74 covers and prevents the suction port 44, the suction gas from the intake chamber 82 into the intake passage 46 can enter. The suction gas then flows via the cooling channel port 34 facing opening 80 via the cooling channel port 34 into the cooling channel 36, flows through, as shown in Fig. 1, the engine compartment 38 and enters through the Kühlkanalauslaß 40 into the intake passage 46th However, it is also possible for the cover body 74 in such a way that this cooling channel port 34 or the suction port 44 only partially covers, so that always occurs a certain portion of the suction gas in these, however, the greater part of the suction gas in the suction port 44 and the cooling channel port 34 enters. Further, it is still possible to provide intermediate positions of the cover body 74, in which this partially covers the suction port 44 and the coolant channel port 34, so that also the entering the suction port 44 and the cooling passage terminal 34 of play of the suction gas can be set in intermediate stages.

For fixing of the cover 74 with the flange 76, the flange plate 76 is provided with two screw holes 88, 90 that the cylinder axis 72 are arranged opposite with respect to, so that the flange plate 76 rotated by 180 ° about the cylinder axis 72 in two positions with the outer housing wall 62 connectable.

The flange 76 also represents also a connection flange for Sauggasabsperrventil 30 that the flange 76 can be placed with its flange and this together with a connecting flange 92 of the connecting unit 52 is connected by screws.

The flange plate 76 is formed with respect to the cylinder axis 72. asymmetric and has, for example sides of the opening 80 additional tabs 94, which are not present on the opposite side, that is on the closed side of the cover body 74, so that at these lugs 94 can be seen in which the two 180 ° to each other rotated by 180 ° about the cylinder axis 72 positions the cover body 74 is inserted with the flange 76th