JP4587778B2 - Discharge side structure, check valve used therefor, and compressor using them - Google Patents

Description

  The present invention relates to a discharge side structure of a compressor (compressor) that compresses a fluid, a check valve used therefor, and a compressor using these.

  In general, on the discharge side of a compressor for air conditioning or the like, fluid pulsation occurs when the discharge valve opens and closes when fluid such as refrigerant is discharged from the inside of the cylinder. It may be further increased by a check valve that prevents it.

In order to solve the above-described problem, for example, as described in Patent Document 1, a compressor in which a throttle portion (refrigerant passage) for reducing fluid pulsation is formed in a housing on the fluid discharge side such as a refrigerant is provided. Proposed.
JP-A-11-315785 (paragraph numbers 0035 to 0040, FIG. 1)

  However, in the one described in Patent Document 1 described above, the pulsation of the fluid generated when discharged from the cylinder of the compressor and increased by the check valve can be reduced at the throttle portion (refrigerant passage). Since the throttle portion is formed in the compressor housing itself, the compressor housing becomes large and requires a large space.

  Moreover, in what is described in said patent document 1, since the aperture | diaphragm | squeeze part is formed in the housing itself, the freedom degree of a layout is low and it lacks versatility.

  Furthermore, it is necessary to accurately position the check valve at the opening of the refrigerant passage on the housing side so that the fluid does not leak. Similarly, when connecting another flow path to the throttle portion that is the refrigerant passage. In addition, since high alignment accuracy is required, there is a problem that the assembling property is poor.

  Therefore, the present invention does not increase the size of the compressor housing, can improve the degree of freedom in layout, is versatile, has good assembly properties, and pulsation of fluid generated on the discharge side of the compressor It is an object of the present invention to provide a discharge side structure capable of reducing the pressure, a check valve used therefor, and a compressor using these.

In order to achieve the above object, the invention according to claim 1 is a discharge side structure in which a check valve is disposed on a fluid discharge side of a compressor for compressing fluid, and the check valve is a discharge on the fluid discharge side. A main body having an opening communicating with the fluid discharge side of the compressor, and a valve body capable of opening and closing the opening of the main body. And an elastic body that urges the valve body to the closed position of the opening and bends by the pressure of the fluid to open the opening, and the main body is provided with a communication hole with one side communicating with the fluid discharge side of the compressor A cylindrical member having an opening on the other side and a cap member covering the other side of the cylindrical member, the opening is provided on a side wall of the cylindrical member, and the valve body is formed on the cylindrical member. An open position for opening the opening inside, and the opening Between the closed position and the closed position, and is disposed in the cylindrical member between one side of the cylindrical member and the valve body to move the valve body to the closed position. Is always energized, the compressor is housed in the check valve, and the check valve is accommodated in a cylindrical flow path toward the discharge pipe, and the opening of the cylindrical member, the cylindrical flow path and the cylindrical shape A passage formed by a member, an inward passage composed of a cap member top and a deflection plate, and a central opening of the deflection plate, and the check valve is disposed on the fluid discharge side of the check valve. A squeezing reduction means for reducing pulsation of fluid generated by driving the compressor is provided, which is formed of a throttle member with a hole formed integrally with a retainer to be fixed and having a through hole at the center .

  In the invention according to claim 1 configured as described above, when fluid pulsation is generated and discharged by the check valve when discharging from the cylinder of the compressor, pulsation reducing means provided on the fluid discharge side of the check valve This reduces fluid pulsation. Further, since the pulsation reducing means described above is provided on the fluid discharge side of the check valve, it is not necessary to form a throttle portion in the compressor housing itself as in the prior art, which increases the size of the housing. In addition, the degree of freedom in layout can be improved. Furthermore, compared with the conventional case where the throttle portion is provided in the housing, high accuracy is not required for the alignment of the check valve.

According to the first aspect of the present invention, the fluid pulsation is reduced by the throttling effect of the throttling portion on the fluid discharge side of the check valve.

Furthermore, in the invention of claim 1 constructed as described above, with the fluid flowing from the check valve is gathered in the center, it passes through the through hole provided in the center of the slotted diaphragm member. At that time, fluid pulsation is reduced by a fluid throttling effect of the throttling member with a hole.

Furthermore, in the invention thus constituted according to claim 1, since the perforated diaphragm member and the retainer are integrally formed, it is possible to perform mounting of the apertured diaphragm member and the retainer 1 degree of effort.

In addition, in the invention thus constituted according to claim 1, the elastic body of the check valve is always biased to the valve body to the closed position, when the fluid discharge pressure of the compressor is small, the fluid discharge side of the compressor The opening that communicates is in the closed state. As a result, the check valve can prevent the fluid on the fluid discharge side of the compressor from flowing backward. Further, when the fluid discharge pressure of the compressor is large, the valve body is pressed to the open position against the elastic body of the check valve to open the opening. As a result, the fluid discharged from the compressor flows out from the check valve opening to the pulsation reducing means.

In addition, in the invention thus constituted according to claim 1, when the fluid discharge pressure of the compressor is large, it presses the valve element which is housed inside the tubular member to the open position against the elastic member Open the opening. As a result, after the fluid flows into the cylindrical member through the communication hole on one side of the cylindrical member, the fluid flows out from the opening provided on the side wall of the cylindrical member and passes outside the cylindrical member. It comes to the pulsation reduction means. Further, the fluid passes through the passage, passes through the inward passage, and is discharged from the central opening of the deflecting plate, and the pulsation is reduced by passing through the passage.

  In the present invention, the housing is not enlarged, and the degree of freedom in layout can be improved. Therefore, there is an effect that a compact and versatile compressor can be provided. In addition, as compared with the conventional case where a throttle portion that is a refrigerant passage is provided in the housing, high accuracy is not required for the alignment of the check valve, so that it is possible to provide a compressor with good assemblability. There is also.

Hereinafter will be described with reference to FIG details of the discharge side structure according to the embodiment and reference examples of the present invention.

[Structure of Compressor] FIG. 1 shows the structure of a compressor (compressor) provided with a reference example of the present invention.

  The compressor of FIG. 1 includes a housing 1, a rear housing 2 joined to the rear end side (right side of FIG. 1) of the housing 1, and a valve plate 3 interposed between the housing 1 and the rear housing 2. A rotating shaft 4 rotatably supported by the housing 1, a driving force transmitting portion 5 that is connected to a tip of the rotating shaft 4 and transmits a rotational driving force by an engine (not shown), and an intermediate portion of the rotating shaft 4 A rotary support 6 provided, a swash plate 7 supported via the rotary support 6, and a piston 9 coupled to the swash plate 7 and reciprocatingly moved in a plurality of compression chambers (cylinder bores) 8. It is mainly comprised by. In such a compressor, the suction chamber 10 and the discharge chamber 11 in the rear housing 2 are connected to the external refrigerant circuit 12, and the piston 9 reciprocates in the compression chamber 8, whereby the refrigerant gas flows into the suction chamber. 10 flows into the compression chamber 8 and is compressed to a predetermined pressure in the compression chamber 8, and then high-pressure refrigerant gas is discharged into the discharge chamber 11 and circulates in the external refrigerant circuit 12. Return to the room 10.

  [First Embodiment] FIGS. 1 to 5 show a first embodiment of the present invention.

  In the discharge side structure 13 according to the present embodiment, a cylindrical flow path R is provided from the discharge chamber 11 located on the fluid discharge side of the compressor toward the connection end with the discharge pipe 14, and the throttle diameter 15 is on the same axis. The check valve 16 and the pulsation reducing means 17 are sequentially arranged, and the throttle diameter 15, the check valve 16 and the pulsation reducing means 17 form a fluid discharge path. A throttle diameter 15 is formed in a portion of the rear housing 2 adjacent to the discharge chamber 11, and a check valve 16 is connected to the discharge chamber 11 through the throttle diameter 15. On the fluid discharge side of the check valve 16, Pulsation reducing means 17 for reducing fluid pulsation generated by driving the compressor is provided, and a discharge pipe 14 is connected to the fluid discharge side of the pulsation reducing means 17.

  The pulsation reducing means 17 is a throttle portion provided on the fluid discharge side of the check valve 16, and the throttle portion includes a throttle member 19 with a hole in which a through hole 18 is formed in the center, and this throttle member 19 with a hole. Is provided between the check valve 16 and a retainer (C-ring) 20 that fixes the check valve 16.

  The check valve 16 includes a main body 22 having a plurality of openings 21 (four in the embodiment) communicating with the fluid discharge side of the compressor, a valve body 23 capable of opening and closing the openings 21 of the main body 22, and an opening 21. And the elastic body 24 that urges the valve body 23 to the closed position and bends by the pressure of the fluid to open the opening 21. The main body 22 has a tubular member 26 having one side (lower end side in FIG. 3) provided with a communication hole 25 communicating with the discharge chamber 11 and opened on the other side (upper end side in FIG. 3), and the cylindrical member 26. The opening 21 is formed on the side wall of the cylindrical member 26 at equal intervals (90 degrees in the embodiment). An O-ring 45 is disposed on the outer periphery of the cylindrical member 26 on the opening 25 side, and the space between the cylindrical flow path R is sealed by the O-ring 45.

The valve body 23 is accommodated in the cylindrical member 26 so as to be movable between a closed position shown in FIG. 2A and an open position shown in FIG. The elastic body 24 is disposed inside the tubular member 26 between one side of the tubular member 26 and the valve body 23, and constantly biases the valve body 23 to the closed position.

  As the valve body 23 moves in the axial direction, the opening 21 is opened at the open position shown in FIG. 2B, and the opening 21 is closed at the closed position shown in FIG. And The cap member 27 includes a disc 28 mounted on the other side of the main body 22 (upper end side in FIG. 3), and a spring receiver 29 provided at the center of one side (lower side in FIG. 3) of the disc 28. The plurality of protrusions 30 (four in the embodiment) are provided at equal intervals on the outer peripheral portion of the disk 28. Each protrusion 30 protrudes upward and in the outer circumferential direction of FIG. 3 from the disk 28, thereby forming a part of the fluid discharge path between adjacent protrusions 30, and each protrusion 30 protrudes downward to open the body 22. 21 can be locked.

  When assembling the check valve 16, first, the valve body 23 is inserted from the other side of the main body 22, one end of the elastic body 24 is brought into contact with the valve body 23, and then the other end of the elastic body 24 is connected to the spring of the cap member 27. The disc 28 is mounted on the other side of the main body 22 while being engaged with the receiver 29, and the protrusion 30 is locked to the opening 21 of the main body 22.

In addition, the cap is provided with a communication hole that communicates the check valve wake space and the back space of the valve element 23. Thereby, the movement of the valve body is made smooth.

In such a reference example , since the elastic body 24 of the check valve 16 constantly urges the valve body 23 to the closed position, when the fluid discharge pressure of the compressor is small, FIG. 2 (a) and FIG. As shown, the opening 21 provided on the side wall of the cylindrical member 26 is in a closed state. Accordingly, the check valve 16 can prevent the fluid on the discharge pipe 14 side from flowing back into the discharge chamber 11. Also, when the fluid discharge pressure of the compressor is large, as shown in FIGS. 2B and 5, the valve body 23 is pressed to the open position in the axial direction against the elastic body 24 to open the opening 21. To do. As a result, when the discharged fluid from the discharge chamber 11 in the rear housing 2 passes through the throttle diameter 15, the fluid pulsation is reduced, and then flows into the communication hole 25 of the main body 22 of the check valve 16. 22 flows out into the flow path consisting of the main body cylindrical member 26 and the cylindrical flow path R, passes between the protrusions 30 of the cap member 27 and gathers at the central portion on the disk 28, and the central portion of the apertured throttle member 19 The fluid pulsation is reduced again when passing through the through hole 18. Next, the discharged fluid flows into the external refrigerant circuit 12 from the discharge pipe 14 through the retainer 20.

In the reference example configured as described above, fluid pulsation can be reduced by the throttle diameter 15 provided on the fluid discharge side of the discharge chamber 11 and the throttle member 19 with a hole provided on the fluid discharge side of the check valve 16. Further, since the above-mentioned throttle member 19 with a hole is provided on the fluid discharge side of the check valve 16, it is not necessary to form a throttle part in the compressor housing itself as in the prior art, and the housing can be enlarged. In addition, the degree of freedom in layout can be improved. Furthermore, since the throttle member 19 with a hole is provided adjacent to the fluid discharge side of the check valve 16, high accuracy is not required for the alignment of the check valve 16.

Further, in this reference example , the throttle diameter 15, the check valve 16 and the pulsation reducing means 17 are sequentially arranged on the same axis from the discharge chamber 11 to the discharge pipe 14, so that these throttle diameter 15, check valve 16 and the like. In addition, the fluid discharge path formed by the pulsation reducing means 17 has a simple structure, and the installation space in the rear housing 2 can be small. Furthermore, since the discharge fluid flows from the discharge chamber 11 to the discharge pipe 14 in a substantially straight line along the axis, the flow resistance of the discharge fluid other than the throttle diameter 15 and the throttle member 19 with a hole can be reduced. .

It shows a first embodiment of the First Embodiment The present invention in FIGS. 6 and 7, the same reference numerals are given to the same components as those shown in FIGS. 1 to 5 described above.

As shown in FIGS. 6 and 7, the discharge side structure 31 of the first embodiment has a pulsation reducing means 32 that is different from the above-described reference example shown in FIGS. The other points are basically the same as the reference example .

  A through hole 34 is formed at the center of the throttle member 33 with a hole, and a plurality of locking pieces 35 protruding from the outer peripheral portion of the throttle member 33 with a hole to the discharge side can be locked to the rear housing 2, and are adjacent to each other. A part of the fluid discharge path is formed between the stop pieces 35. The throttle member 33 with a hole includes a column member 36 between the throttle valve 33 and the check valve 16, and a gap 37 formed between the throttle member 33 with a hole and the check valve 16 forms a part of the fluid discharge path. . The fluid that has passed through the check valve 16 gathers in the center through a gap 37 between the throttle member 33 with a hole and the check valve 16 and pulsates when passing through the through hole 34 in the center of the throttle member 33 with a hole. Then, the refrigerant flows into the external refrigerant circuit 12 through the discharge pipe 14 through the adjacent locking pieces 35.

  The column member 36 may not be provided on the throttle member 33, and a gap may be secured between the throttle member 33 and the check valve cap member 27 using the protrusion 30 of the cap member 27.

Even in the discharge side structure 31 of the first embodiment configured as described above, fluid pulsation can be reduced by the throttle member 33 with a hole provided on the fluid discharge side of the check valve 16 as in the reference example. Can do. Further, since the above-mentioned throttle member 33 with a hole is provided on the fluid discharge side of the check valve 16, it is not necessary to form a throttle part in the compressor housing itself as in the prior art, and the housing does not increase in size. In addition, the degree of freedom in layout can be improved. Furthermore, since the throttle member 31 with a hole is provided on the fluid discharge side of the check valve 16, high accuracy is not required for the alignment of the check valve 16.

Furthermore, in the first embodiment, the retainer and the apertured diaphragm member 33 are provided integrally, so that they can be attached with one effort.

In the above-described reference example , the case where the apertured throttle member 19 is provided alone has been described. In the first embodiment, the case where the retainer-integrated apertured aperture member 33 is provided has been described. The present invention is not limited to this, and the throttle member with a hole may be provided integrally with the check valve or the rear housing.

[ Second Embodiment] FIG. 8 shows a second embodiment of the present invention. In FIG. 8, the same components as those shown in FIGS. 1 to 5 described above are denoted by the same reference numerals.

  As shown in FIG. 8, the discharge side structure 38 of the present embodiment is provided with a deflection plate 39 on the fluid discharge side of the cap member 27 of the check valve 16. An opening 40 is formed by the disk 28 and the protrusion 30.

  Moreover, in the compressor (compressor) in which the discharge structure of this embodiment and the check valve 16 are used, the passage 42 formed by the opening 21 of the tubular member 26 and the tubular flow path R and the tubular member 26. And a flow path having an inward passage 41 composed of the top of the gap member 27 and the deflection plate 39 and a central opening 44 of the deflection plate 39.

  In the present embodiment, the central opening 44 of the deflection plate 39 may be set smaller than the cross-sectional areas of the passage 42 and the inward passage 41, and the inward passage 41 is more than the passage 42 and the central opening 44 of the deflection plate 39. May be set smaller.

  The deflection plate 39 may be integrated with the retainer 20 or may be integrated with the check valve 16.

  INDUSTRIAL APPLICABILITY Since the present invention has an effect of providing a compact, versatile compressor with good assembling ability, it can be applied as an air conditioner for vehicles, and in addition, an air conditioner for general machinery or industrial machinery. It is also widely applicable.

It is sectional drawing of the compressor provided with the discharge side structure which concerns on the reference example of this invention. It is sectional drawing which shows the discharge side structure of this reference example . It is a disassembled perspective view of the non-return valve provided in the discharge side structure of this reference example . It is an assembly perspective view which shows the state which the non-return valve of this reference example closed. It is an assembly perspective view which shows the state which the non-return valve of this reference example opened. It is explanatory drawing which shows the pulsation reduction means provided in 1st Embodiment of this invention. It is sectional drawing which shows the discharge side structure of this embodiment. It is explanatory drawing which shows the pulsation reduction means provided in 2nd Embodiment of this invention.

Explanation of symbols

2 Rear housing (housing)
DESCRIPTION OF SYMBOLS 11 Discharge chamber 13 Discharge side structure 16 Check valve 17 Pulsation reduction means 18 Through-hole 19 Throttling member with hole 20 Retainer 21 Opening 22 Main body 23 Valve body 24 Elastic body 25 Communication hole 26 Cylindrical member 27 Cap member 28 Disc 29 Spring Receiving member 30 Protrusion 31 Discharge side structure 32 Pulsation reducing means 33 Throttling member with hole 34 Through hole 35 Locking piece 36 Column member 37 Gap 38 Discharge structure 39 Deflection plate

Claims (1)

A discharge side structure in which a check valve (16) is disposed on a fluid discharge side of a compressor for compressing fluid,
The check valve (16) is disposed in a flow path from the discharge chamber (11) on the fluid discharge side toward the connection end with the discharge pipe (14),
The check valve (16) includes a main body (22) having an opening (21) communicating with the fluid discharge side of the compressor, and a valve body (23) capable of opening and closing the opening (21) of the main body (22). And an elastic body (24) that urges the valve body (23) to the closed position of the opening (21) and bends by the pressure of fluid to open the opening (21).
The main body (22) includes a cylindrical member (26) provided on one side with a communication hole (25) communicating with the fluid discharge side of the compressor and the other side opened, and the other side of the cylindrical member (26). And the opening (21) is provided on the side wall of the tubular member (27), and the valve body (23) is disposed inside the tubular member (26). (21) is housed movably between an open position in which the opening (21) is opened and a closed position in which the opening (21) is closed, and the tubular member (26) is placed inside the tubular member (26). The elastic body (24) is constantly urged to the closed position by disposing the valve body (23) between the one side and the valve body (23),
The compressor is housed in the check valve (16) and the check valve (16) in a cylindrical flow path (R) facing the discharge pipe (14), and an opening of the cylindrical member (26). (21), a passage (42) formed by the tubular flow path (R) and the tubular member (26), an inward passage (41) comprising the top of the cap member (27) and the deflection plate (39). , Having a flow path composed of the central opening (44) of the deflection plate (39),
A throttle with a hole formed integrally with a retainer (20) for fixing the check valve (16) on the fluid discharge side of the check valve (16) and having a through hole (18, 34) in the center. A discharge-side structure comprising members (19, 33) and provided with pulsation reducing means (17, 32) for reducing pulsation of fluid generated by driving the compressor.

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