Compressor

Abstract: A compressor is composed of a housing (1) equipped with a compression mechanism portion and a cover body (10) having a fitting portion, the housing has a suction cavity (3) communicating with a suction chamber (6) and a discharge cavity (4) communicating with a discharge chamber (8) on a peripheral surface thereof, the suction cavity (3) and the discharge cavity (4) are closed up tightly by fitting the cover body (10) to the housing (1), and the fitting portion is made to communicate with the suction cavity and the discharge cavity, respectively.

Description: FIELD OF THE INVENTION AND RELATED ART STATEMENT The present invention relates to a compressor, and more particularly to a compressor for a car cooler which is installed on an engine. A compressor for general applications however with the features according to the first part of claim 1 is known from GB-A-2 107 790. A compressor for a car cooler is fastened to an engine usually with bolts and the like, and is driven together with an alternator, a cooling water pump and the like through a V belt which is wound around a pulley fixed at one end of a crank shaft of the engine. Besides, a car cooler is mounted at user's wish. Accordingly, a compressor for a car cooler is installed on an engine after completion of a motor car, and a refrigerant piping is connected with this compressor. Now, in case a car type is different, a layout of an engine, a configuration of an engine and the like are also different. Therefore, the compressor is restricted seriously in points of installing position on the engine and posture, and is also subject to restriction in points of position and direction of a fitting portion with which the refrigerant piping is connected. In order to cope with such situation, housings having configurations corresponding to respective engines on which a compressor is installed has been heretofore prepared in a compressor of this type, thus giving rise to a problem of adding to a cost. OBJECT AND SUMMARY OF THE INVENTION It is an object of the present invention to provide a compressor in which reduction of cost is aimed at by using a principal part of a housing in common. According to the present invention which has been made to achieve above-mentioned object, there is provided a compressor that is provided with a further cover member in which the direction of the fitting portion is different to that of the first cover member and there is a flange which surrounds above-mentioned suction cavity and discharge cavity while the cover is fitted to the flange. In the present invention, it is possible to alter the connecting position and the direction of the suction piping and the delivery piping by exchanging the cover member only. As a result, it becomes no longer necessary to prepare variety of housings in accordance with the engine, being different from a conventional compressor. Hence, the cost may be reduced by a large margin. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing a partial section taken along a line I-I in Fig. 2; Fig. 2 is a top view; Fig. 3 is a top view showing a state in which a cover member has been removed; Fig. 4 is a front view; Fig. 5 is a partial side view taken along an arrow mark V in Fig. 4; and Fig. 6 is a side view corresponding to Fig. 5 in case a different cover member is installed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 thru Fig. 6 show an embodiment of the present invention. A scroll compression mechanism C consisting of a stationary scroll 18, a revolving scroll 19 and the like is self-contained inside a housing 1 as shown in Fig. 1, and refrigerant gas is compressed by driving the revolving scroll 19 through a rotary shaft 2. A suction cavity 3 and a discharge cavity 4 are formed in one body while being adjacent to each other across a partition wall 12 on an outer periphery of the housing 1 as shown in Fig. 1 and Fig. 3. The suction cavity 3 communicates with a suction chamber 6 through a communication hole 5, and the discharge cavity 4 communicates with a discharge chamber 8 through a communication hole 7. A flange wall 9 is set up so as to surround the suction cavity 3 and the discharge cavity 4 in the housing 1 as shown in Fig. 3, and the suction cavity 3 and the discharge cavity 4 are closed up tightly between a cover member 10 and the housing 1 by fastening the cover member 10 to the flange wall 9 by means of a plurality of (6 pieces in Fig. 2) bolts 11. A suction fitting 13 with which a suction piping is connected and a discharge fitting 14 with which a discharge piping is connected are formed in the cover member 10. Further, as shown in Fig. 1, the suction fitting 13 communicates with the suction cavity 3 and the discharge fitting 14 communicates with the discharge cavity 4. An oil seal 15 which surrounds the suction cavity 3 and an oil seal 16 which surrounds the discharge cavity 4 are buried in an end surface of the flange wall 9 as shown in Fig. 1 and Fig. 3, and these oil seals 15 and 16 are in close contact with the end surface of the cover member 10, thereby to prevent gas leakage. As shown in Fig. 5, it is possible to connect the suction piping and the discharge piping from the front (right side seeing from the front of the compressor), respectively, when the cover member 10 in which fittings 13 and 14 are formed so as to face the front (a direction perpendicular to the shaft) is fitted to the flange wall 9. However, when a cover member 10A in which fittings 13 and 14 are formed so as to face the back (another direction perpendicular to the shaft), respectively, is fitted to the flange wall 9 as shown in Fig. 6, it is possible to connect the suction piping and the discharge piping from the back (left side seeing from the front of the compressor), respectively. Since the suction cavity 3 and the discharge cavity 4 are formed adjacent to each other, these cavities can be closed up by a single action by means of one piece of cover member 10. Further, when a recessed portion 3a which conforms to the suction cavity 3 and a recessed portion which conforms to the discharge cavity 4 are formed inside the cover member 10 as shown in Fig. 1, it is possible to increase the volume of the suction cavity 3 and the discharge cavity 4 and also to have them function as a muffler. Besides, when a plurality of types of cover members having positions and directions of the fittings 13 and 14 altered in accordance with the type of engine equipped with a compressor are prepared, the suction piping and the discharge piping can be connected at any position and from any direction by exchanging the cover member. In above-mentioned embodiment, the cover member 10 is fitted to the upper part of the housing 1, but it is also possible to arrange so that it may be fitted to any portion, viz., the lower portion, the side portion and the end portion of the housing 1 and so forth. Further, when the suction cavity 3 and the discharge cavity 4 are formed point-symmetrically or linear-symmetrically, it is possible to alter positions and directions of the suction fitting 13 and the discharge fitting 14 of the cover member 10 by 180° by installing the cover member 10 after altering the direction by 180°.

Claims: A compressor, comprising a housing (1) in which a suction cavity (3) communicating with a suction chamber (6) and a discharge cavity (4) communicating with a discharge chamber (8), the suction and discharge cavities are formed in one body while having them be adjacent with each other across a partition wall (12) on an outer periphery, a cover member (10) having a fitting portion with which a suction piping and a discharge piping are connected, and which is fitted detachably to the housing (1) so as to close up said suction cavity (3) and discharge cavitiy (4) tightly and also has said fitting portion communicate with said suction cavity (3) characterized in that said compressor is provided with a further cover member (10A) in which the direction of the fitting portion is different to that of the first cover member and that there is a flange (9) surrounding said suction cavity (3) and discharge cavity while the cover is fitted to the flange (9). A compressor according to Claim (1), characterized in that grooves are formed so as to surround said suction cavity and discharge cavity on said flange, respectively, and seal members are disposed in these grooves. A compressor according to Claim (1), characterized in that said cover member is fixed by fastening to said housing with a plurality of bolts. A compressor according to Claim (1), characterized in that recessed portions which conform to the suction cavity and the discharge cavity of said housing are formed on said cover member, respectively. A compressor for a car cooler according to Claim (1) characterized in that said compressor is installed on an engine for a motor car.

Inventors: HIRANO TAKASHISA C O NAGOYA TE, IIO TAKAYUKI MITSUBISHI JUKOGY, HIRANO, TAKASHISA, C/O NAGOYA TECHNICAL INSTITUTE, IIO, TAKAYUKI, MITSUBISHI JUKOGYO K.K.
Applicants: MITSUBISHI HEAVY IND LTD, MITSUBISHI JUKOGYO KABUSHIKI KAISHA
Application year: 1991
Main classification: F04C23
IPC codes: F04C18, F04C29, F04C23