Refrigerant compressor

The invention relates to a refrigerant compressor comprising A motor unit comprising a motor and a motor driven by a motor Cooling channel for the engine , As well as a compressor unit, which comprises a compressor stage With a compressor stage inlet and a compressor stage outlet And an outer suction port Outgoing suction channel which, like the Cooling channel to the compressor stage inlet.

Such refrigerant compressors are known from the state of the art For example, the document US Pat. No. 5 007 809. In this case, the pipeline system for The suction gas either to the cooling channel connection or to the suction connection Depending on the type of cooling Of the motor unit.

The object of the invention is therefore to provide a refrigerant compressor Of the generic type, Characterized in that the cooling is variable with as little as possible Structural changes.

This object is achieved with a refrigerant compressor of the According to the invention External connection unit is provided, to which the cooling channel connection And the suction port are arranged, Wherein the connection unit comprises a receptacle and a setting part, Which in at least two different positions in The receptacle is insertable and in that, Positions of the adjusting part which correspond to the cooling channel connection and Of the total quantity supplied to the intake port Of the suction gas supplied via an external suction gas connection Can be set differently.

The advantage of the solution according to the invention is thus also the case That in the refrigerant compressor a single suction gas connection Is provided, to which the pipeline for the Suction gas and that, depending on the application area, a Different kind of cooling, namely different Strong suction gas cooling of the engine unit up to the exclusive Air cooling of the motor unit, in simple This can only be done by changing the setting part Respectively. That is, by varying the proportion of the Suction gas flowing into the cooling channel port, and The proportion of the suction gas flowing into the suction port, The cooling of the engine unit by the suction gas in Adaptation to the respective application.

Thus, regardless of the type of cooling of the Motor unit is to be implemented, an installation of the refrigerant compressor Standardized preparation.

A particularly favorable solution provides that in one of the Positions with the setting part a connection between An external suction gas connection and the cooling channel connection and In another of the positions with the adjustment part one Connection between the suction gas connection and the suction connection Can be produced.

Thus, the possibility of setting one is essentially Exclusively suction gas cooling and a substantially Exclusive air cooling of the engine unit.

The type of positions in which the adjusting part is inserted into the Recording should be used in connection with the So far described Specified. For example, it is conceivable to adjust the setting part In two differing by a translation movement Positions. However, this has the disadvantage that the Two positions of the suction gas connection are also through Their spatial arrangement.

For this reason, a particularly advantageous solution provides In that the adjusting part is arranged around an axis of symmetry of the suction gas connection Rotated positions into the receptacle Is. This solution has the advantage that by the rotation Around an axis of symmetry of the suction gas connection, the symmetry axis Of the suction gas connection itself And thus the pipe lines leading to the suction gas connection Also independent of the type of cooling of the Motor unit to the same location.

This solution is particularly advantageous when the suction gas connection Is rotationally symmetrical, so that the Possibility to adjust the two positions of the adjustment part By two relatively twisted relative to one another Positions.

Regarding the type of fitting of the adjusting member, So far no further details have been given. So it would be For example, to form the connecting unit in such a way that, After the compressor housing has been opened, the adjusting part in Of the corresponding position. To this cumbersome Opening of the compressor housing, however, It is preferably provided that the adjusting part is connected to the adjusting part by means of a External opening of the connection unit can be inserted into the receptacle Is.

Thus, on the one hand, the adjusting part can easily be exchanged And on the other hand in a simple way into the two Positions without manipulations on the refrigerant compressor Themselves.

So far, it has not been specified in detail how the Connection unit itself. For example It would be conceivable to design the connecting unit in such a way that the Adjustment part with an outside of the holder The connection between the suction gas connection and the Suction port or the cooling channel port. A Particularly favorable solution provides that the recording has a In which the cooling channel connection and the And that in each of the positions of the Either the cooling channel port or the suction port Can be covered. This solution thus has the advantage, That it is very compact, since the sealing of the cooling channel connection Or of the suction port by means of a control device shown in FIGS Inner-engaging region of the adjusting part.

A particularly favorable solution provides that the interior space Of the receptacle has an approximately cylindrical shape since In this case the corresponding adjusting part Easy to manufacture.

A particularly advantageous solution provides that the Interior of the receptacle extends as a recess into a partition wall In which the cooling channel and the intake channel , Since, in this case, the cooling channel connection And the suction connection particularly advantageously To open into the interior.

A particularly useful one in terms of compact design Solution provides that the adjusting part is inserted into the interior And is thus space-saving in the inventive Refrigerant compressor.

In order to further simultaneously filter the suction gas It is preferably provided that the adjusting part A suction gas filter.

The adjusting part can be realized as simply as desired, If it has a cover body with which either The cooling channel connection or the suction connection can be closed , So that the suction gas supplied via the suction gas connection Into the respectively unconnected connection.

The covering body could be of any complexity. A particularly advantageous solution provides for the covering body Has an approximately semi-cylindrical shape so that This can be connected in a simple manner to the cooling channel connection or The suction port can be covered when it is moved into a Cylindrical wall of the interior space.

In order to adjust the setting part in the respective position on the It is preferable to provide a fixed- Characterized in that a flange plate is arranged on the adjusting part Connected to a connection flange of the connection unit So that with this plate, on the one hand, Fixation of the adjustment part is performed and then on Of the flange plate itself for the supply of the suction gas Necessary elements could be connected.

It is particularly advantageous in this case if, on the Flange plate of the adjustment part the suction gas shut-off valve Can be mounted.

In order to be able to simultaneously recognize the flange plate in FIG Which position the adjusting part is, is preferred The flange plate is provided on one side of the adjusting part Has a different shape than on an opposite one Page. This is already the case at the distinctive Shape of each other Sides in a simple way the position of the flange plate and Thus the position of the adjusting part can be recognized.

Particularly advantageous is a solution in which the Flange plate and the adjusting part fixedly arranged thereon In two positions rotated through 180 ° relative to each other Of the mount. With this solution, With standard flange attachments, which have a twofold Symmetry, in a simple manner the two positions Of the adjusting part can be realized without further special features Necessary.

Further features of the invention are the subject of the following Description as well as the graphic representation Of an exemplary embodiment.

In the drawing: FIG.<dl tsize="6"><dt>FIG</dt><dd>4 is a longitudinal section through an inventive device refrigerant compressor;</dd><dt>FIG</dt><dd>2 is a sectional view taken along line 2-2 in FIG Closed cooling channel connection;</dd><dt>FIG</dt><dd>2 is a sectional view taken along line 2-2 in FIG Closed suction port;</dd><dt>FIG</dt><dd>12 is a plan view of a device according to the invention Adjusting part in the direction of the arrow A in FIG. 5;</dd><dt>FIG</dt><dd>12 shows a plan view of the adjusting part according to the invention In the direction of the arrow B in FIG. 4 and</dd><dt>FIG</dt><dd>12 shows a plan view of the adjusting part according to the invention In the direction of the arrow C in FIG. 5.</dd></dl>

An exemplary embodiment of a refrigerant compressor according to the invention 10 comprises one designated as a whole as 12 Motor unit and a compressor unit designated as a whole as 14, Both in a common compressor housing 16 are arranged. A portion 18 of the compressor housing 16 encloses the whole as 20 , Preferably an electric motor, comprising: For its part, via a shaft 22, one in a section 24 Of the compressor housing 16, a compressor stage Forming piston compressor 26.

The supply of refrigerant takes place via a suction gas pipe 28, Which is guided to a suction gas shut-off valve 30. The The suction gas shut-off valve 30 is connected to a control valve 32, Which are connected via a Cooling channel connection 34 with a cooling channel 36 , Which is provided in the section 18 of the compressor housing 16 And serves to separate sucked-in refrigerant through a Which accommodates the motor 20, and thus also by means of the motor chamber 38 It is possible to pass the motor 20, the cooling channel 36 connecting the After the engine 20 has been passed through A cooling channel outlet 40.

Further, from the connection unit 32 via a suction port 44 can be supplied with an inlet channel 46 Which is led to a compressor stage inlet 48. In addition, the cooling channel outlet 40 also preferably opens in The intake duct 46, so that it can also pass through the cooling duct 36 to the intake passage 46 and over It can be fed to the compressor stage inlet 48.

In the compressor stage 26, the refrigerant is compressed, Which then flows via a compressor stage outlet 50 Can be removed.

As shown in FIGS. 2 and 3, the cooling channel 36, and the intake passage 46 through one in the compressor housing 16 is separated and subsequently connected The wall 60 is formed by an outer housing wall 62, Distance from this inner housing wall 64 limited. The wall 60 extends as far as the connecting unit 32 and is designed to form a receptacle 66 with a Recess, so that the receptacle 66 has an interior space 68 which extends between the outer housing wall 62 and the inner housing wall 64, and in which The cooling channel connection 34 and the suction connection 44.

In the interior 68 of the receptacle 66 is a housing 70 as a whole Can be inserted via an outer opening 71, Which, as shown in FIGS Of its outer circumferential surface to a cylindrical axis 72 approximately Half-cylindrical cover element 74, Which in turn is fixedly connected to a flange plate 76 Is.

The approximately half-cylindrical to the axis 72 The cover body 74 can be inserted into the receptacle 66, The cylinder axis 72 extends transversely, preferably vertically To the outer housing wall 62 and the inner housing wall 64 , The cover body 74 being moved in the direction of the arrow Cylinder axis 72 has a length so that, with its axis, Which faces away from the flange plate 76, Mount 66 to the inner housing wall 64, and preferably terminates therewith.

The covering body 74 encloses in the form of a cylinder jacket An inflow space 82 and furthermore, due to its only Approximately semi-cylindrical shape still has an opening 80, Via which suction gas from the region enclosed by the cover body 74 In-flow space 82.

The flange plate 76 also has an inflow opening 84 , Which represents a suction gas connection, Suction gas shut-off valve 30 in the direction of the cylinder axis 72 Suction gas can flow into the inflow space 82.

Preferably, in the region enclosed by the cover body 74, A suction gas filter 86 can be inserted into the intake air inlet space 82, The shut-off valve 30, which is fed from the suction gas shut-off valve 30, 84, first the suction gas filter 86 And then enters the inflow space 82.

The cover body 74 with the flange plate 76, as shown in FIG. 2 and 3, can either be inserted into the receptacle, That the cover body 74 essentially connects the cooling channel connection 34 And thus prevents the suction gas from flowing out of the suction pipe Flow chamber 82 enters the cooling channel 36, but the Opening 80 is facing the suction port 44, Suction gas from the inflow space 82 via the suction port 44 in FIG The intake passage 46 can enter, as shown in FIG Is.

However, it is also possible to provide the cover body 74 with the cover body 74 Flange plate 76 around the cylinder axis 72 of the cover body To be inserted into the receptacle 66 by 180 °, so The cover body 74 covers the suction port 44 and Prevents the suction gas from flowing from the inflow space 82 into the Suction channel 46. The suction gas then flows over The opening 80 facing the cooling channel port 34, Cooling channel connection 34 into the cooling channel 36, As shown in FIG. 1, passes over the engine compartment 38 Enters the cooling channel outlet 40 into the intake channel 46.

However, it is also possible to form the cover body 74 in such a way that, In such a way that it connects the cooling channel connection 34 or the suction connection 44 only partially, so that always a certain proportion Of the suction gas enters the latter, but the greater part Of the suction gas into the suction port 44 and the cooling channel port, respectively 34. Furthermore, it is still possible to make intermediate positions Of the cover body 74, into which the latter is placed Partially the suction port 44 and the cooling port port 34 , So that the air flowing into the suction port 44 and The cooling channel connection 34, of the suction gas In intermediate stages.

For fixing the cover body 74 to the flange plate 76 The flange plate 76 is provided with two screw holes 88, 90 Which are located opposite the cylinder axis 72 So that the flange plate 76 can be rotated in two directions 180.degree Which are rotated about the cylinder axis 72, with the outer Housing wall 62.

The flange plate 76 also simultaneously provides a connection flange For the suction gas shut-off valve 30, Its connecting flange can be placed on the flange plate 76 And together with a connecting flange 92 of the Connector 52 by means of screws.

The flange plate 76 is oriented with respect to the cylinder axis 72 Asymmetrical and has, for example, sides The opening 80 has additional lugs 94, which are arranged on the opposite side Side, that is on the closed side Of the cover body 74 are not present, so that at these points Noses 94, in which of the two brackets, which are offset by 180 ° By 180 ° about the cylinder axis 72 The cover body 74 with the flange plate 76 is inserted.