JP6036780B2 - Compressor - Google Patents

Description

  The present invention relates to a compressor provided with a check valve that prevents a reverse flow of refrigerant toward a suction pipe via a suction port.

  Conventionally, a vane type compressor as disclosed in Patent Document 1 is known as a kind of compressor. A cylinder block is accommodated in the housing of the vane compressor. In addition, a rotation shaft is rotatably supported by the housing. The rotating shaft passes through the cylinder block. In the cylinder block, the rotor is fixed to the rotary shaft so as to be integrally rotatable. On the outer peripheral surface of the rotor, vane grooves are formed radially at a plurality of locations, and vanes are accommodated in the respective vane grooves so as to be able to appear and disappear. These vanes define a plurality of compression chambers in the cylinder block.

  A suction chamber communicating with the compression chamber is formed in the housing. A suction port communicating with the suction chamber is formed through the peripheral wall of the cylindrical shell constituting the housing. A check valve is disposed inside the diameter of the suction port. The check valve is opened during the compression operation of the vane compressor. When the check valve is opened, the refrigerant gas sucked from the suction port is introduced into the compression chamber through the suction chamber. On the other hand, the check valve is closed when the vane compressor is stopped. When the check valve is closed, the check valve causes the refrigerant gas to flow back to the outside of the vane compressor (evaporator) from the compression chamber side through the suction chamber and the suction port when the compression of the vane compressor is stopped. Is prevented.

JP-A-9-250472

  By the way, the shell is provided with a joint portion that is continuous with the suction port on the side opposite to the suction chamber and to which the suction pipe is connected. Here, if the check valve is arranged inside the diameter of the suction port, it is necessary to secure a space for arranging the check valve inside the diameter of the suction port. It may protrude or the amount of protrusion from the shell at the joint portion may increase, and the vane compressor will be enlarged.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a compressor that can be reduced in size by suppressing the amount of protrusion from the shell at the joint portion.

  A compressor that solves the above problems includes a cylindrical shell having a peripheral wall, a suction port that is formed through the peripheral wall so as to be continuous with a joint portion provided on the shell and connected to a suction pipe, and the shell. A partition body that is housed in the partition and defines a suction chamber that communicates with the suction port in cooperation with the inner peripheral surface of the shell, and a check that prevents a reverse flow of the refrigerant toward the suction pipe via the suction port. And the check valve includes a valve body that moves in a direction of moving toward and away from the inner peripheral surface of the shell, and a guide portion that guides the movement of the valve body. A guide member, the guide member being supported by the partition body, the valve body having a facing surface facing the suction port, and surrounding the suction port on an inner peripheral surface of the shell On the opposite surface. Le portion is abutting against the seat.

  According to this, since the check valve is arranged on the inner side of the shell with respect to the inner peripheral surface of the shell, it is not necessary to secure a space for arranging the check valve on the inner side of the diameter of the suction port. . Therefore, the protrusion amount from the shell in the joint portion can be suppressed, and the compressor can be miniaturized.

In the compressor, it is preferable that an inner peripheral surface of the shell has an arc shape, and the seal portion extends in an arc shape.
According to this, the seal portion easily comes into contact with the periphery of the suction port on the inner peripheral surface of the shell. Therefore, since it is not necessary to process the portion of the inner peripheral surface of the shell where the seal portion abuts into a flat surface, it is possible to ensure the sealing performance of the check valve seal portion without complicating the processing of the shell. it can.

The said compressor WHEREIN: It is preferable that the said seal part protrudes rather than the said opposing surface while being provided in the outer periphery whole periphery of the said opposing surface.
According to this, for example, even if a burr protrudes from the edge of the suction port toward the valve body, the seal portion surrounds the burr on the inner peripheral surface of the shell. Since it abuts, the sealing performance of the seal portion can be ensured.

In the compressor, it is preferable that the facing surface extends in an arc shape, and the guide portion is disposed at a central portion in a circumferential direction of the shell with respect to the valve body.
According to this, compared with the case where the guide part is arranged at a position offset from the central part in the circumferential direction of the shell with respect to the valve body, the distance that can guide the valve body in the guide part is made as long as possible. be able to. Therefore, the movement of the valve body can be improved, and the operability of the check valve can be improved.

  In the compressor, the check valve includes an urging portion that urges the valve body toward the inner peripheral surface of the shell, and the urging portion has a circumferential portion of the shell with respect to the valve body. It is preferable that it is arrange | positioned in the center part of the direction.

  According to this, compared with the case where the energizing part is arranged on the outer side in the circumferential direction of the shell with respect to the central part in the circumferential direction of the shell in the valve body, the physique in the circumferential direction of the shell in the valve body is increased. The check valve can be reduced in size.

  In the compressor, the check valve includes an urging portion that urges the valve body toward the inner peripheral surface of the shell, and the urging portion has a circumferential portion of the shell with respect to the valve body. It is preferable that they are respectively disposed on both sides of the central portion of the direction.

  According to this, compared with the case where the urging portion is arranged only on one side of the valve body on both sides of the center portion in the circumferential direction of the shell, the valving portion is urged by the urging portion. , It is possible to prevent the valve body from being biased toward the inner peripheral surface of the shell in a tilted posture.

In the compressor, it is preferable that a retaining mechanism for preventing the valve body from coming off from the guide member is provided between the guide member and the valve body.
According to this, when the check valve is supported by the partition body, it is possible to prevent the valve body from coming off from the guide member by the retaining mechanism, so that workability when installing the check valve is improved. Can be improved.

In the compressor, it is preferable that the guide member is provided with a contact portion that can contact the inner peripheral surface of the shell.
According to this, when the contact portion contacts the inner peripheral surface of the shell, it is possible to easily ensure the positioning of the guide member between the inner peripheral surface of the shell and the partition body.

In the compressor, the seal part is preferably formed of an elastic material.
According to this, the sealing performance can be improved.
In the compressor, the seal part is preferably a separate member from the valve body.

  According to this, the processing of the valve body can be simplified.

  According to this invention, it is possible to reduce the size by suppressing the amount of protrusion from the shell at the joint portion.

A side sectional view showing a vane type compressor in an embodiment. FIG. 1 is a sectional view taken along line 1-1 in FIG. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. The perspective view of a non-return valve. Sectional drawing which expands and shows the check valve periphery. Sectional drawing which shows the state which the check valve opened. Sectional drawing which expands and shows the non-return valve periphery in another embodiment. Sectional drawing which expands and shows the seal | sticker part periphery in another embodiment. Sectional drawing which expands and shows the non-return valve periphery in another embodiment.

  Hereinafter, an embodiment in which the compressor is embodied as a vane type compressor will be described with reference to FIGS. In addition, the vane type compressor of this embodiment is used for a vehicle air conditioner while being mounted on a vehicle.

  As shown in FIG. 1, the housing 11 of the vane compressor 10 includes a rear housing 12 that is a cylindrical shell having a peripheral wall 12a, and a front housing 13 joined to a front end surface (one end surface) of the rear housing 12. And is formed from. The front housing 13 has a cylindrical cylinder block 14 accommodated in the rear housing 12. Therefore, in this embodiment, the cylinder block 14 is integrated with the front housing 13.

  A side plate 15 is joined to the rear end surface of the cylinder block 14. A rotary shaft 16 is rotatably supported by the front housing 13 and the side plate 15, and the rotary shaft 16 passes through the cylinder block 14. A lip seal type shaft seal device 17 a is interposed between the front housing 13 and the rotary shaft 16. The shaft seal device 17 a prevents the refrigerant gas from leaking along the peripheral surface of the rotating shaft 16. In the cylinder block 14, a cylindrical rotor 18 is fixed to the rotary shaft 16 so as to be integrally rotatable. The rotor 18 has a front end face (one end face) facing the end face of the front housing 13 and a rear end face (other end face) facing the side plate 15.

  As shown in FIGS. 2 and 3, the inner peripheral surface of the cylinder block 14 is formed in an elliptical shape. On the outer peripheral surface of the rotor 18, vane grooves 18 a are formed radially at a plurality of locations, and vanes 19 are accommodated in the respective vane grooves 18 a so as to be able to appear and retract. Lubricating oil is supplied to each vane groove 18a.

  When the tip surface of the vane 19 comes into contact with the inner peripheral surface of the cylinder block 14 due to the rotation of the rotor 18 accompanying the rotation of the rotating shaft 16, the outer peripheral surface of the rotor 18, the inner wall of the cylinder block 14, and the adjacent vane 19 A plurality of compression chambers 21 are defined between the front housing 13 and the side plate 15. In the vane type compressor 10, a stroke in which the compression chamber 21 increases in volume with respect to the rotation direction of the rotor 18 is a suction stroke, and a stroke in which the compression chamber 21 decreases in volume is a compression stroke.

  As shown in FIG. 1, a suction port 22 is formed through the peripheral wall 12 a of the rear housing 12. Further, the rear housing 12 is provided with a joint portion 24 that is continuous with the suction port 22 on the side opposite to the inner side of the rear housing 12. A suction pipe 25 extending from the outside of the vane compressor 10 (for example, an evaporator of an external refrigerant circuit) is connected to the joint portion 24.

  A concave portion 14 a is formed on the outer peripheral surface of the cylinder block 14 over the entire circumference in the circumferential direction of the cylinder block 14. A suction chamber 20 communicating with the suction port 22 is defined by the recess 14 a and the inner peripheral surface of the rear housing 12. Therefore, the cylinder block 14 is a partition body that partitions the suction chamber 20 in cooperation with the inner peripheral surface of the rear housing 12.

  As shown in FIG. 2, the suction chamber 20 extends in the circumferential direction of the rotary shaft 16 between the cylinder block 14 and the rear housing 12. On the inner peripheral surface of the peripheral wall 12 a of the rear housing 12, the periphery where the suction port 22 opens extends in an arc shape. The suction chamber 20 and the suction port 22 are disposed so as to overlap the compression chamber 21 in the radial direction of the rotating shaft 16. The cylinder block 14 is formed with a pair of suction ports 23 communicating with the suction chamber 20. The compression chambers 21 and the suction chambers 20 in the suction stroke are communicated with each other via the suction ports 23.

  As shown in FIG. 3, a concave portion 14 b that is recessed from the outer peripheral surface of the cylinder block 14 is formed on each outer peripheral surface of the cylinder block 14 that sandwiches the rotating shaft 16. Each recess 14b is formed of an extending surface 141b extending from the outer peripheral surface of the cylinder block 14 toward the rotating shaft 16, and an attachment surface 142b extending toward the outer peripheral surface of the cylinder block 14 while intersecting the extending surface 141b. Has been. A pair of discharge chambers 30 are defined by the extended surfaces 141b, the mounting surfaces 142b, and the inner peripheral surface of the rear housing 12. Therefore, each discharge chamber 30 is formed between the cylinder block 14 and the rear housing 12 in the radial direction of the rotating shaft 16.

  The cylinder block 14 is formed with a discharge port 31 that opens to each mounting surface 142b and communicates the compression chamber 21 and the discharge chamber 30 during the compression stroke. Each discharge port 31 can be opened and closed by a discharge valve 32 attached to the attachment surface 142b. Then, the refrigerant gas compressed in the compression chamber 21 pushes out the discharge valve 32 and is discharged into the discharge chamber 30 through the discharge port 31.

  As shown in FIG. 1, a discharge port 34 is formed in the peripheral wall 12 a of the rear housing 12. The rear housing 12 is provided with a joint portion 38 that is continuous with the discharge port 34 on the side opposite to the inner side of the rear housing 12. A discharge pipe 39 extending toward the outside of the vane compressor 10 (for example, a capacitor of an external refrigerant circuit) is connected to the joint portion 38.

  On the rear side of the rear housing 12, a discharge region 35 is defined by the side plate 15. An oil separator 36 for separating lubricating oil contained in the refrigerant gas is disposed in the discharge region 35. The oil separator 36 has a bottomed cylindrical case 36a, and a cylindrical oil separation cylinder 36b is fitted and fixed to the opening side of the case 36a. An oil passage 36c that connects the inside of the case 36a and the bottom side of the discharge region 35 is formed in the lower portion of the case 36a. The side plate 15 and the case 36a are formed with a communication passage 37 that allows the discharge chamber 30 to communicate with the inside of the case 36a. Further, the side plate 15 is formed with an oil supply passage 15d for guiding the lubricating oil stored on the bottom side of the discharge region 35 to the vane groove 18a. A check valve 40 is provided in the suction chamber 20.

  As shown in FIGS. 4 and 5, the check valve 40 includes a valve body 41 that moves in a direction toward and away from the inner peripheral surface of the rear housing 12, and the valve body 41 on the inner peripheral surface of the rear housing 12. An urging spring 42 serving as an urging portion that urges the valve body 41 and a guide member 43 that guides the movement of the valve body 41 in a direction in which the valve body 41 contacts and separates from the inner peripheral surface of the rear housing 12 are provided. The valve body 41 and the guide member 43 are made of resin.

  The valve body 41 has an elongated plate shape in plan view, and an opposing surface 41 a facing the suction port 22 extends in an arc shape extending along the inner peripheral surface of the rear housing 12 in the long side direction. . A seal portion 41 s that protrudes from the facing surface 41 a is formed on the entire outer periphery of the facing surface 41 a of the valve body 41. The seal portion 41s extends in an arc shape. In the present embodiment, the seal portion 41 s is formed integrally with the valve body 41. The seal portion 41 s extends along the inner peripheral surface of the rear housing 12 and can come into contact with a seat portion 12 e around the suction port 22 on the inner peripheral surface of the rear housing 12.

  A cylindrical portion 41c that protrudes linearly from the inner end surface 41b is provided at the center portion in the circumferential direction of the rear housing 12 on the inner end surface 41b opposite to the facing surface 41a of the valve body 41. A pair of plate-like locking projections 41d extending linearly from the inner end surface 41b is provided on both edges of the inner end surface 41b of the valve body 41 in the long side direction. The front ends of the respective locking protrusions 41d are formed in a bowl shape that protrudes outward from the edge of the valve body 41 in the long side direction.

  The guide member 43 includes a base portion 43a that is an elongated flat plate shape in plan view. In the end surface 43b of the base portion 43a facing the valve body 41, a cylindrical guide portion 44 that extends linearly toward the inner end surface 41b of the valve body 41 is provided at the central portion in the long side direction of the base portion 43a. . The guide portion 44 is inserted inside the cylindrical portion 41 c of the valve body 41. Therefore, the guide portion 44 is disposed at the center portion of the valve body 41 in the circumferential direction of the rear housing 12.

  The cylindrical portion 41 c is guided by the outer peripheral surface of the guide portion 44 as the valve body 41 moves. As a result, the movement of the valve body 41 in the direction in which the valve body 41 contacts and separates from the inner peripheral surface of the rear housing 12 is guided.

  Both end portions in the long side direction of the base portion 43 a are located outside the both edges of the valve body 41 in the long side direction. A pair of plate-like locking projections 43d extending in a direction orthogonal to the end surface 43b is provided from both ends in the long side direction of the end surface 43b of the base portion 43a. The front ends of the respective locking protrusions 43d are formed in a hook shape that protrudes inward in the long side direction of the base portion 43a. The tip of each locking projection 41d of the valve body 41 and the tip of each locking projection 43d of the guide member 43 can be locked to each other. By the locking of the locking protrusions 41d and 43d, the valve body 41 is prevented from coming off from the guide member 43. Accordingly, each of the locking protrusions 41d and 43d constitutes a retaining mechanism that is provided between the valve body 41 and the guide member 43 and prevents the valve body 41 from coming off from the guide member 43.

  Two urging springs 42 are provided between the valve body 41 and the guide member 43. Each biasing spring 42 is arranged on both sides of the cylindrical portion 41 c and the guide portion 44. That is, the respective biasing springs 42 are respectively arranged on both sides of the valve body 41 with the center portion in the circumferential direction of the rear housing 12 interposed therebetween.

  A fitting recess 14 c into which the base portion 43 a of the guide member 43 can be fitted is formed in a portion facing the suction port 22 on the outer peripheral surface of the cylinder block 14. When the base portion 43 a is fitted into the fitting recess 14 c, the guide member 43 is supported by the cylinder block 14 and the check valve 40 is positioned in the suction chamber 20.

  As a step of arranging the check valve 40 in the suction chamber 20, first, the base 43a is fitted into the fitting recess 14c in a state before the cylinder block 14 is accommodated in the rear housing 12. The cylinder block 14 is accommodated in the rear housing 12 in a state where the valve element 41 is pressed against the guide member 43 against the urging force of each urging spring 42. Then, the valve body 41 is pressed against the inner peripheral surface of the rear housing 12 by the urging force of each urging spring 42, and the check valve 40 is held between the rear housing 12 and the cylinder block 14 in the suction chamber. 20.

Next, the operation of this embodiment will be described.
As shown in FIG. 6, when the rotating shaft 16 rotates, the rotor 18 and the vane 19 rotate, and the refrigerant gas flows into the suction port 22 from the evaporator via the suction pipe 25, The suction pressure of the refrigerant gas acts, and the valve body 41 moves away from the inner peripheral surface of the rear housing 12 against the urging force of each urging spring 42. Then, the check valve 40 is opened, and the refrigerant gas is sucked into the suction chamber 20 through the suction port 22. The refrigerant gas sucked into the suction chamber 20 is sucked into the compression chambers 21 during the suction stroke through the suction ports 23. The refrigerant gas sucked into each compression chamber 21 is compressed by the volume reduction of the compression chamber 21 during the compression stroke. The compressed refrigerant gas is discharged from the compression chambers 21 to the discharge chambers 30 through the discharge ports 31.

  The refrigerant gas in each discharge chamber 30 flows out into the case 36a through the communication passage 37 and is sprayed on the outer peripheral surface of the oil separation cylinder 36b, and in the case 36a while turning around the outer peripheral surface of the oil separation cylinder 36b. It is led below. At this time, the lubricating oil is separated from the refrigerant gas by centrifugation. The lubricating oil separated from the refrigerant gas moves to the bottom side of the case 36a and is stored at the bottom of the discharge region 35 through the oil passage 36c. The lubricating oil stored at the bottom of the discharge region 35 is guided from the oil supply passage 15d to the vane groove 18a, and pushes the vane 19 to the outer peripheral side as back pressure. And the compression chamber 21 is divided by the vane 19 pushed out to the outer peripheral side. In addition, the sliding portion between the vane 19 and the vane groove 18a is lubricated by the lubricating oil guided to the vane groove 18a. On the other hand, the refrigerant gas from which the lubricating oil has been separated in the oil separator 36 moves upward in the oil separation cylinder 36 b and is discharged to the capacitor via the discharge port 34 and the discharge pipe 39.

  On the other hand, when the rotation of the rotating shaft 16 stops, the rotation of the rotor 18 and the vane 19 stops, and the compression operation of the vane compressor 10 stops. Then, as shown in FIG. 5, the valve body 41 is urged toward the inner peripheral surface of the rear housing 12 by the urging force of each urging spring 42, and the guide portion 44 against the inner peripheral surface of the rear housing 12. When the valve body 41 is guided in the approaching direction, the seal portion 41s comes into contact with the seat portion 12e. The arc-shaped seal portion 41 s is disposed along the arc-shaped inner peripheral surface of the rear housing 12. As a result, the check valve 40 is closed, and the backflow of the refrigerant gas from the compression chamber 21 toward the suction pipe 25 through the suction chamber 20 and the suction port 22 when the compression of the vane compressor 10 is stopped is prevented. Is done.

In the above embodiment, the following effects can be obtained.
(1) The check valve 40 includes a valve body 41 that moves in a direction in which the check valve 40 contacts and separates from the inner peripheral surface of the rear housing 12. The periphery of the suction port 22 on the inner peripheral surface of the rear housing 12 is a seat portion 12e with which the seal portion 41s of the valve body 41 abuts. According to this, since the check valve 40 is disposed inside the rear housing 12 rather than the suction port 22 on the inner peripheral surface of the rear housing 12, the check valve 40 is disposed inside the diameter of the suction port 22. It is not necessary to secure a space to perform. Therefore, the amount of protrusion of the joint portion 24 from the rear housing 12 can be suppressed, and the vane compressor 10 can be downsized.

  (2) The seal portion 41 s extends in an arc shape along the inner peripheral surface of the rear housing 12. According to this, the seal portion 41 s easily comes into contact with the periphery of the suction port 22 on the inner peripheral surface of the rear housing 12. Therefore, it is not necessary to process the portion of the inner peripheral surface of the rear housing 12 where the seal portion 41s abuts into a flat surface, so that the processing of the rear housing 12 is not complicated, and the seal portion 41s of the check valve 40 is not complicated. Sealability can be secured.

  (3) The seal portion 41 s is provided on the entire outer peripheral edge of the opposed surface 41 a of the valve body 41 and protrudes from the opposed surface 41 a. According to this, for example, even if a burr protrudes from the edge of the suction port 22 toward the valve body 41, the suction port on the inner peripheral surface of the rear housing 12 so that the seal portion 41s surrounds the burr. Therefore, the sealing performance of the sealing portion 41s can be ensured.

  (4) The guide portion 44 is disposed at the central portion in the circumferential direction of the rear housing 12 with respect to the valve body 41. According to this, it is possible to guide the valve element 41 in the guide part 44 as compared with the case where the guide part 44 is disposed at a position offset from the center part in the circumferential direction of the rear housing 12 with respect to the valve element 41. Can be made as long as possible. Therefore, the movement of the valve body 41 can be made favorable, and the operability of the check valve 40 can be improved.

  (5) The urging springs 42 are respectively arranged on both sides of the valve body 41 with the center portion in the circumferential direction of the rear housing 12 interposed therebetween. According to this, as compared with the case where the urging spring 42 is disposed only on one side of the valve body 41 on both sides of the central portion in the circumferential direction of the rear housing 12, the valve body 41 is urged. When biased by the spring 42, the valve body 41 can be prevented from being biased toward the inner peripheral surface of the rear housing 12 in an inclined posture.

  (6) Each locking protrusion 41d, 43d constitutes a retaining mechanism for preventing the valve element 41 from coming off from the guide member 43. According to this, when the check valve 40 is assembled to the cylinder block 14, the valve body 41 can be prevented from coming off the guide member 43 by the locking of the locking protrusions 41 d and 43 d. The workability when installing the check valve 40 can be improved.

  (7) The direction of the extending direction of the joint portion 24 may be limited due to restrictions on the mounting space for the vehicle in the vane compressor 10. Even in this case, according to the check valve 40 of the present embodiment, the joint portion 24 is extended as long as it is within the region of the opposed surface 41a of the valve body 41 extending along the inner peripheral surface of the rear housing 12. The position of the suction port 22 can be freely changed in accordance with the direction of the direction. Therefore, the design freedom of the joint part 24 can be improved.

  (8) The opposing surface 41a of the valve body 41 is formed in an arc shape extending along the inner peripheral surface of the rear housing 12 in the long side direction. According to this, in the opened state of the check valve 40, the refrigerant gas flowing from the suction port 22 into the suction chamber 20 flows along the opposing surface 41 a of the valve body 41 and easily flows in the circumferential direction of the suction chamber 20. Therefore, inhalation efficiency can be improved.

  (9) Since the check valve 40 is disposed in the suction chamber 20 which is an existing space, it is not necessary to provide a separate space for arranging the check valve 40, and the vane compressor 10 can be downsized. .

  (10) Although the refrigerant gas from the joint portion 24 sometimes strikes the opposing surface 41 a of the valve body 41 obliquely, the arc-shaped seal portion 41 s is disposed along the arc-shaped inner peripheral surface of the rear housing 12. Therefore, the allowable range of mutual positional deviation can be widened, and the valve body 41 can be operated stably.

In addition, you may change the said embodiment as follows.
As shown in FIG. 7, the urging spring 42 may be accommodated inside the guide portion 44. In short, the urging spring 42 may be disposed at the center in the circumferential direction of the rear housing 12 with respect to the valve body 41. According to this, in comparison with the case where the biasing spring 42 is disposed on the outer side in the circumferential direction of the rear housing 12 with respect to the central portion in the circumferential direction of the rear housing 12 in the valve body 41, The size of the rear housing 12 in the circumferential direction can be reduced, and the check valve 40 can be reduced in size.

  As shown in FIG. 8, the seal portion 41 s may be a separate member from the valve body 41. The seal portion 41s may be formed of an elastic material (for example, rubber). Since the seal portion 41s is formed of an elastic material, for example, the sealing performance can be improved as compared with the case where the seal portion 41s is formed of a resin material. Further, since the seal portion 41 s is a separate member from the valve body 41, the processing of the valve body 41 can be simplified as compared with the case where the seal portion 41 s is integrally formed with the valve body 41.

  As shown in FIG. 9, the guide member 43 may be provided with a contact portion 43 e that can contact the inner peripheral surface of the rear housing 12. The contact portion 43e is formed in a plate shape that continues to the tip of the locking projection piece 43d and extends linearly toward the inner peripheral surface of the rear housing 12. The tip of the abutting portion 43 e can abut on the inner peripheral surface of the rear housing 12. According to this, the front end of the abutting portion 43 e abuts on the inner peripheral surface of the rear housing 12, so that it is easy to ensure the positioning of the guide member 43 between the inner peripheral surface of the rear housing 12 and the cylinder block 14. can do.

In the embodiment, the curvature of the arc of the seal portion 41s and the curvature of the arc of the inner peripheral surface of the rear housing 12 may be the same or different.
In the embodiment, the seal portion 41s may be formed in a flat surface shape. In this case, it is preferable to process the portion of the inner peripheral surface of the rear housing 12 where the seal portion 41s abuts into a flat surface.

In the embodiment, the facing surface 41a may be formed in a flat surface shape.
In the embodiment, the guide portion 44 may be disposed at a position offset from the central portion in the circumferential direction of the rear housing 12 with respect to the valve body 41.

In the embodiment, the seal portion 41s may not protrude from the facing surface 41a. For example, the facing surface 41a may be the seal portion 41s.
In the embodiment, the locking protrusions 41d and 43d may be deleted.

  In the embodiment, the suction chamber 20 and the suction port 22 do not have to overlap the compression chamber 21 in the radial direction of the rotating shaft 16, and may be disposed closer to the front than the cylinder block 14, for example. For example, the suction chamber 20 communicating with the suction port 22 may be defined by the inner peripheral surfaces of the front housing 13 and the rear housing 12. In this case, the front housing 13 is a partition body that partitions the suction chamber 20 in cooperation with the inner peripheral surface of the rear housing 12.

In the embodiment, the cylinder block 14 may be a separate body from the front housing 13.
(Circle) in embodiment, the vane type compressor 10 may not be used for a vehicle air conditioner, and may be used for another air conditioner.

  In the embodiment, the compressor is not limited to the vane type compressor 10, and may be, for example, a scroll type, a swash plate type, or a roots type compressor.

  DESCRIPTION OF SYMBOLS 10 ... Vane type compressor as a compressor, 12 ... Rear housing which is a shell, 12a ... Peripheral wall, 12e ... Seat part, 14 ... Cylinder block which is a division body, 20 ... Suction chamber, 22 ... Suction port, 24 ... Joint , 25 ... Suction piping, 40 ... Check valve, 41 ... Valve body, 41a ... Opposing surface, 41d, 43d ... Locking protrusion constituting the retaining mechanism, 41s ... Sealing part, 42 ... Energizing part Biasing spring, 43 ... guide member, 43e ... contact part, 44 ... guide part.

Claims (10)

A cylindrical shell having a peripheral wall;
A suction port formed through the peripheral wall so as to be continuous with a joint portion provided in the shell and connected to a suction pipe;
A compartment that is accommodated in the shell and defines a suction chamber that communicates with the suction port in cooperation with an inner peripheral surface of the shell;
A check valve that prevents a reverse flow of refrigerant toward the suction pipe through the suction port,
The check valve is a valve body that moves in a direction of moving toward and away from the inner peripheral surface of the shell;
A guide member having a guide part for guiding the movement of the valve body,
The guide member is supported by the partition body,
The valve body has a facing surface facing the suction port,
The compressor characterized in that the periphery of the suction port on the inner peripheral surface of the shell is a seat portion with which a seal portion provided on the facing surface abuts. The inner peripheral surface of the shell is arcuate,
The compressor according to claim 1, wherein the seal portion extends in an arc shape.   The compressor according to claim 1, wherein the seal portion is provided on the entire outer peripheral edge of the facing surface and protrudes from the facing surface. The opposing surface extends in an arc shape,
The compressor according to claim 2 or 3, wherein the guide portion is disposed at a central portion in a circumferential direction of the shell with respect to the valve body. The check valve includes a biasing portion that biases the valve body toward the inner peripheral surface of the shell,
The compressor according to any one of claims 2 to 4, wherein the urging portion is arranged at a central portion in a circumferential direction of the shell with respect to the valve body. The check valve includes a biasing portion that biases the valve body toward the inner peripheral surface of the shell,
The said urging | biasing part is each arrange | positioned with respect to the said valve body on both sides which pinched | interposed the center part of the circumferential direction of the said shell, It is any one of Claims 2-4 characterized by the above-mentioned. Compressor.   7. A retaining mechanism for preventing the valve body from coming off the guide member is provided between the guide member and the valve body. The compressor according to item.   The compressor according to any one of claims 1 to 7, wherein the guide member is provided with a contact portion capable of contacting the inner peripheral surface of the shell.   The compressor according to any one of claims 1 to 8, wherein the seal portion is made of an elastic material.   The compressor according to claim 9, wherein the seal portion is a separate member from the valve body.