JP6760176B2 - Compressor - Google Patents

Description

The present invention relates to a compressor.

The compressor is provided with a check valve to prevent the refrigerant from flowing back. As disclosed in Patent Documents 1 and 2 below, a check valve generally includes a valve seat member forming a valve hole, a valve body that opens and closes the valve hole by being separated from the valve seat member, and a valve. It is equipped with a spring that urges the body in the valve closing direction.

Japanese Unexamined Patent Publication No. 2003-232456 Jitsukaisho 53-130519

In the check valve disclosed in Japanese Patent Application Laid-Open No. 2003-232456 (Patent Document 1), one valve body is formed in a state where the first valve body and the second valve body are in close contact with each other, and a spring is used. The one valve body is urged in the valve closing direction. The valve hole is opened by moving one valve body against the urging force of the spring. The publication states that the spring can be omitted depending on the implementation.

If the spring is omitted in the configuration of Patent Document 1, one valve body is moved by the pressure of the fluid flowing in the forward direction to open the valve hole, and one valve body is opened by the pressure of the fluid flowing in the opposite direction. It is moved in the valve closing direction to close the valve hole. Since one valve body has a predetermined weight, it is not always easy to stably move one valve body as described above by the pressure of the fluid.

The air-operated automatic valve disclosed in Japanese Patent Application Laid-Open No. 53-130519 (Patent Document 2) includes two valve bodies that can move independently of each other in order to open and close the fluid passage. One valve body is connected to the piston and urged by a spring. When the piston moves due to the supply of pressurized air, the one valve body moves in the valve opening direction against the urging force of the spring. The other valve body is moved in the valve opening direction by the fluid flowing through the fluid passage. In the configuration of Patent Document 2, a spring for urging one of the valve bodies is required.

When a spring as described above is used in the check valve, the valve hole is closed by bringing the valve body into contact with the valve seat member by the urging force of the spring. The above-mentioned spring for closing the valve hole acts as a resistance to the valve body moving in the valve opening direction when the valve is opened, which may cause a loss in the kinetic energy of the fluid or the pressure of the fluid. .. If it is possible to adopt a configuration that does not have the above-mentioned spring for closing the valve hole, or if a configuration that has a smaller spring than the above-mentioned valve closing spring is used as a check valve. If it can be adopted, the resistance acting on the valve body at the time of valve opening will be reduced, the check valve can be made smaller and lighter, it can be installed in a smaller space, and the entire compressor can be made smaller. It is also possible to contribute.

The present invention has been made in view of the above circumstances, and provides a compressor provided with a check valve having a configuration capable of reducing pressure loss and miniaturization. The purpose.

The compressor based on the present invention is a compressor provided with a check valve that allows the refrigerant to flow in the forward direction toward the compression chamber and regulates the flow of the refrigerant in the reverse direction. Is a valve seat member that forms a valve hole through which the refrigerant passes, and a valve body that is arranged on the downstream side of the valve seat member in the forward direction and is separated from the valve seat member to open and close the valve hole. The valve body is provided with a stopper that restricts the movement of the valve body in the opening / closing direction on the opposite side of the valve seat member, and the valve body is relative to the valve body in the opening / closing direction of the valve body. The leading member is connected via a connecting portion having a variable distance, the leading member can pass through the valve hole, and when the valve body is in contact with the stopper, the leading member is in the valve hole. When the refrigerant does not jump out from the above in the opposite direction and the refrigerant flows in the opposite direction, the leading member passes through the valve hole in the opposite direction by receiving the pressure from the refrigerant. Then, the valve body is pulled to move in the opposite direction, and the valve hole is closed by the differential pressure through the valve body in contact with the valve seat member.

In the compressor, preferably, the leading member has a first locking portion, the valve body has a second locking portion that locks to the first locking portion, and the refrigerant is in the above order. When flowing in the direction, the first locking portion and the second locking portion are separated from each other, and when the refrigerant flows in the opposite direction, the leading member moves in the opposite direction. The first locking portion and the second locking portion are mutually locked by moving toward the valve body, and the first locking portion and the second locking portion are mutually locked in the valve body. Move in the opposite direction as described above.

In the compressor, preferably, the leading member is a shaft portion erected on a first plate-shaped portion and a portion of the first plate-shaped portion opposite to the side on which the valve hole is located. The valve body has a second plate-shaped portion formed with an insertion hole through which the shaft portion is inserted, and the side of the second plate-shaped portion where the valve hole is located. There is a gap between the first plate-shaped portion and the second plate-shaped portion in a state where the refrigerant has a tubular portion provided on the opposite side and the refrigerant is flowing in the forward direction. It is formed.

In the compressor, the connecting portion is preferably composed of at least one of a string, a chain, a rod, a coil spring and a flat plate.

In the compressor, the leading member preferably has a spherical shape, a flat plate shape, or a hollow cone shape.

In the compressor, the leading member is preferably configured to be lighter than the valve body.

The compressor preferably further includes a guide portion that guides the movement of the valve body by sliding contact with the valve body.

The compressor preferably has a suction port through which the refrigerant passes, and includes a housing that forms a suction chamber communicating with the suction port inside, and the valve seat member is provided in the suction port. The leading member and the valve body are arranged in the suction chamber.

According to the check valve of the compressor, the valve body and the leading member are connected to each other so that the relative distance to the valve body in the opening / closing direction of the valve body is variable, and the leading member is caused by the pressure of the fluid. By moving, pressure loss can be reduced and miniaturization can be achieved by using a spring at least or by using a smaller spring.

It is sectional drawing which shows the compressor 10 in Embodiment 1. FIG. It is sectional drawing along the line II-II in FIG. It is sectional drawing along the line III-III in FIG. It is sectional drawing which enlarges and shows the region surrounded by IV line in FIG. 2, and shows the sectional structure of the check valve 40. It is sectional drawing which shows the disassembled state of the check valve 40 in Embodiment 1. FIG. FIG. 5 is a cross-sectional view showing a state in which the refrigerant is flowing in the forward direction in the check valve 40 of the first embodiment. FIG. 5 is a cross-sectional view showing a state when the refrigerant starts to flow in the reverse direction in the check valve 40 of the first embodiment. FIG. 5 is a cross-sectional view showing a state in which the leading member 80 is moved by the refrigerant flowing in the opposite direction in the check valve 40 of the first embodiment. FIG. 5 is a cross-sectional view showing a state in which the valve hole 51 is closed by the valve body 70 in the check valve 40 of the first embodiment. It is sectional drawing which shows the check valve 40Z in the comparative example. It is sectional drawing which shows the check valve 40A in the modification of Embodiment 1. FIG. It is sectional drawing which shows the check valve 40B in Embodiment 2. FIG. FIG. 5 is a cross-sectional view showing a state when the refrigerant starts to flow in the opposite direction in the check valve 40B of the second embodiment. FIG. 5 is a cross-sectional view showing a state in which the leading member 80 is moved by the refrigerant flowing in the opposite direction in the check valve 40B of the second embodiment. FIG. 5 is a cross-sectional view showing a state in which the valve hole 51 is closed by the valve body 70 in the check valve 40B of the second embodiment. It is sectional drawing which shows the check valve 40C in Embodiment 3. FIG. It is sectional drawing which shows the state when the refrigerant starts to flow in the reverse direction in the check valve 40C of Embodiment 3. FIG. FIG. 5 is a cross-sectional view showing a state in which the leading member 80 is moved by the refrigerant flowing in the opposite direction in the check valve 40C of the third embodiment. FIG. 5 is a cross-sectional view showing how the flat plate 67 is moved by the refrigerant flowing in the opposite direction in the check valve 40C of the third embodiment. FIG. 5 is a cross-sectional view showing a state in which the valve hole 51 is closed by the valve body 70 in the check valve 40C of the third embodiment. It is sectional drawing which shows the check valve 40D in Embodiment 4. FIG. It is sectional drawing which shows the state that the refrigerant flows in the forward direction in the check valve 40D of Embodiment 4. FIG. FIG. 5 is a cross-sectional view showing a state in which the refrigerant flows in the reverse direction and the leading member 80 is moved by the refrigerant flowing in the reverse direction in the check valve 40D of the fourth embodiment. FIG. 5 is a cross-sectional view showing a state in which the valve hole 51 is closed by the valve body 70 in the check valve 40D of the fourth embodiment. It is sectional drawing which shows the check valve 40E in Embodiment 5. It is sectional drawing which shows the state that the refrigerant flows in the forward direction in the check valve 40E of Embodiment 5. FIG. 5 is a cross-sectional view showing a state in which the refrigerant flows in the reverse direction and the leading member 80 is moved by the refrigerant flowing in the reverse direction in the check valve 40E of the fifth embodiment. FIG. 5 is a cross-sectional view showing a state in which the valve hole 51 is closed by the valve body 70 in the check valve 40E of the fifth embodiment. It is sectional drawing which shows the check valve 40F in Embodiment 6. FIG. 5 is a cross-sectional view showing a state in which the refrigerant flows in the reverse direction and the leading member 80 is moved by the refrigerant flowing in the reverse direction in the check valve 40F of the sixth embodiment. FIG. 5 is a cross-sectional view showing a state in which the valve hole 51 is closed by the valve body 70 in the check valve 40F of the sixth embodiment. It is sectional drawing which shows the check valve 40G in Embodiment 7.

The embodiment will be described below with reference to the drawings. The same parts and equivalent parts may be given the same reference number and duplicate explanations may not be repeated.

[Embodiment 1]
(Compressor 10)
FIG. 1 is a cross-sectional view showing the compressor 10 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. The compressor 10 is mounted on a vehicle, for example, and is used as an air conditioner for the vehicle. Although the compressor 10 is a vane type, the ideas disclosed below are also applicable to scroll type, swash plate type, and roots type compressors.

As shown in FIG. 1, the compressor 10 includes a housing 11 and a check valve 40. The housing 11 includes a rear housing 12 and a front housing 13 as its components, and forms a suction chamber 20 inside. The rear housing 12 has a peripheral wall 12a (see FIGS. 2 and 3). The front housing 13 has a cylinder block 14. The cylinder block 14 is integrated with the front housing 13 and is housed in the rear housing 12. A side plate 15 is joined to the cylinder block 14.

A rotor 18 is provided inside the cylinder block 14. A plurality of grooves 18a are provided on the outer peripheral surface of the rotor 18 (FIGS. 2 and 3). A vane 19 is housed inside the groove 18a so as to be infestable. The rotor 18 rotates as the rotating shaft 16 rotates. The compression chamber 21 is partitioned between the outer peripheral surface of the rotor 18, the inner wall of the cylinder block 14, a pair of adjacent vanes 19, the front housing 13 (FIG. 1), and the side plate 15 (FIG. 1). ..

A recess 14a is formed on the outer peripheral surface of the cylinder block 14 over the entire circumference of the cylinder block 14 in the circumferential direction (see FIG. 2). The suction chamber 20 is formed by the recess 14a provided in the cylinder block 14 and the inner peripheral surface of the rear housing 12. The suction chamber 20 is formed between the cylinder block 14 (recess 14a) and the rear housing 12 (peripheral wall 12a). The suction port 22 provided in the housing 11 (rear housing 12) forms a refrigerant passage through which the refrigerant passes, and communicates with the suction chamber 20. Although the details will be described later, a check valve 40 for preventing the backflow of the refrigerant from the suction chamber 20 to the suction port 22 is provided in the suction port 22.

A pair of suction ports 23 (FIG. 2) communicating with the suction chamber 20 are formed in the cylinder block 14. During the suction stroke, the compression chamber 21 and the suction chamber 20 communicate with each other via the suction port 23. A pair of recesses 14b are also provided on the outer peripheral surface of the cylinder block 14 (FIGS. 1 and 3). The discharge chamber 30 is partitioned by the recess 14b and the inner peripheral surface of the rear housing 12 (peripheral wall 12a). The cylinder block 14 is formed with a discharge port 31 (FIG. 3) that communicates the compression chamber 21 and the discharge chamber 30. The discharge port 31 is opened and closed by the discharge valve 32. The refrigerant gas compressed in the compression chamber 21 pushes away the discharge valve 32 and is discharged to the discharge chamber 30 through the discharge port 31.

As shown in FIG. 1, a discharge port 34 is formed on the peripheral wall 12a of the rear housing 12. A capacitor of an external refrigerant circuit (not shown) is connected to the discharge port 34. A discharge region 35 (FIG. 1) is partitioned on the rear side of the rear housing 12 by a side plate 15. An oil separator 36 is arranged in the discharge region 35.

A communication passage 37 is formed in the side plate 15 and the oil separator 36 (FIGS. 1 and 3). The communication passage 37 communicates the discharge chamber 30 and the oil separator 36. An oil supply passage 15d (FIG. 1) is formed in the side plate 15. The oil supply passage 15d guides the lubricating oil stored in the bottom of the discharge region 35 to the groove 18a (vane groove).

(Check valve 40)
With reference to FIGS. 1 and 2, the suction port 22 is provided so as to penetrate the peripheral wall 12a of the rear housing 12 (shell), and a tubular joint portion 24 is continuously provided on the outside of the suction port 22. .. A suction pipe 25 is connected to the joint portion 24. A refrigerant (refrigerant gas) flows into the suction port 22 from an evaporator (not shown) via a suction pipe 25. The suction port 22 forms a refrigerant passage through which the refrigerant passes. A check valve 40 is provided in the suction port 22.

FIG. 4 is an enlarged cross-sectional view showing a region surrounded by the IV line in FIG. 2, and shows the cross-sectional structure of the check valve 40. FIG. 5 is a cross-sectional perspective view showing a disassembled state of the check valve 40. As shown in FIGS. 4 and 5, the check valve 40 includes a valve seat member 50, a valve body 70, and a stopper 14s. The check valve 40 is arranged inside the compressor 10 as described in detail below, allows the refrigerant to flow in the forward direction toward the compression chamber 21 (see FIG. 6), and allows the refrigerant to flow in the opposite direction. (See Fig. 9).

(Valve seat member 50)
The valve seat member 50 of the check valve 40 has a hollow annular shape as a whole and is provided in the suction port 22. The valve seat member 50 has a valve hole 51 inside through which the refrigerant passes. The valve seat member 50 is a member provided separately from the member forming the inner wall surface of the suction port 22 (rear housing 12 in the present embodiment), and is fixed to the inner wall surface of the suction port 22 by press fitting. ..

Of the valve seat member 50, the end face on the downstream side of the valve hole 51 in the forward direction (in other words, the end face located on the downstream side of the valve hole 51 in the forward direction when the refrigerant is flowing in the forward direction) is. It forms a valve seat 52. The valve seat 52 of the present embodiment is formed so as to be located in a plane perpendicular to the axial direction of the suction port 22. The valve seat 52 comes into contact with the sealing surface 75 of the valve body 70, which will be described later.

(Valve body 70)
The valve body 70 of the check valve 40 is arranged on the downstream side of the valve seat member 50 in the forward direction (in other words, the downstream side of the valve seat member 50 in the forward direction when the refrigerant is flowing in the forward direction). .. The valve body 70 is separated from the valve seat member 50 to open and close the valve hole 51. A leading member 80 whose relative distance to the valve body 70 in the opening / closing direction of the valve body 70 is variable is connected to the valve body 70. In the present embodiment, the valve body 70 and the leading member 80 are movable relative to each other, and both are arranged in the suction chamber 20.

(Leading member 80)
The leading member 80 has a first plate-shaped portion 81, a shaft portion 82, and a bottom portion 83. The first plate-shaped portion 81 has a substantially disk-shaped shape. The first plate-shaped portion 81 is a portion of the valve body 70 and the leading member 80 that is arranged at a position closest to the valve hole 51 when the refrigerant is flowing in the forward direction. The surface of the first plate-shaped portion 81 on the side where the valve seat member 50 is located has a spherical shape, and the central portion of the surface bulges toward the side where the valve seat member 50 is located. ing. The surface 85 of the first plate-shaped portion 81 opposite to the side on which the valve seat member 50 is located has a flat surface shape.

The shaft portion 82 has a columnar shape. The shaft portion 82 is erected on a portion of the first plate-shaped portion 81 opposite to the side on which the valve hole 51 (valve seat member 50) is located. The bottom portion 83 has a plate-like shape, and the outer peripheral edge of the bottom portion 83 has a circular shape. The shaft portion 82 is provided at the central portion of the bottom portion 83. The surface of the bottom 83 on the side where the valve seat member 50 is located forms the first locking portion 84, and has a flat surface shape.

In the present embodiment, the shaft portion 82 and the bottom portion 83 are integrally manufactured with each other by resin molding or the like. The first plate-shaped portion 81 is joined to the tip of the shaft portion 82 in a state where the shaft portion 82 is inserted into the insertion hole 71 described later. The shaft portion 82 and the first plate-shaped portion 81 are joined to each other by, for example, screwing or an adhesive. In the present embodiment, the length of the shaft portion 82 is longer than the thickness of the second plate-shaped portion 72 described later, and depending on the configuration, the valve body 70 and the leading member 80 are in the opening / closing direction of the valve body 70. They are connected to each other so that their relative distances are variable. That is, the shaft portion 82 and the bottom portion 83 can function as connecting portions.

Not limited to the above configuration, the first plate-shaped portion 81 and the shaft portion 82 are integrally manufactured with each other, and the bottom portion 83 is joined to the tip of the shaft portion 82 in a state where the shaft portion 82 is inserted into the insertion hole 71. It doesn't matter if it is done. Not limited to this configuration, the first plate-shaped portion 81, the shaft portion 82, and the bottom portion 83 may all be manufactured as separate members.

The valve body 70 has a second plate-shaped portion 72 and a tubular portion 73. The second plate-shaped portion 72 has a disk-shaped shape, and an insertion hole 71 is formed in the center. The surface of the second plate-shaped portion 72 on the side where the valve seat member 50 is located forms a sealing surface 75, and the surface on the opposite side forms the second locking portion 74. The tubular portion 73 is provided on the outer peripheral portion of the second plate-shaped portion 72 on the side opposite to the side where the valve hole 51 (valve seat member 50) is located, and has a hollow shape.

(Stopper 14s)
As shown in FIGS. 4 and 5, a stopper 14s is provided on the opposite side of the valve seat member 50 with respect to the valve body 70. The stopper 14s of the present embodiment is composed of a part of the surface of the cylinder block 14 (recess 14a). Although the part of the cylinder block 14 (recess 14a) functions as one of the components of the check valve 40, the stopper 14s may be a member provided separately from the cylinder block 14. The stopper 14s abuts on the valve body 70 to limit the movement of the valve body 70 in the opening / closing direction. The check valve 40 may further include a tubular body 62 (guide portion). The tubular body 62 is fixed on the surface of the cylinder block 14 (recess 14a). When the inner peripheral surface of the tubular body 62 is in sliding contact with the outer peripheral surface of the valve body 70, the tubular body 62 guides the movement of the valve body 70 (details will be described later). By disposing such a tubular body 62, the valve body 70 can move more stably.

With reference to FIG. 4, in the present embodiment, the diameter D51 of the valve hole 51 is larger than the diameter D81 of the outer peripheral edge of the first plate-shaped portion 81 and smaller than the diameter D75 of the sealing surface 75. Therefore, the first plate-shaped portion 81 of the leading member 80 can be arranged inside the valve hole 51 or can pass through the valve hole 51. On the other hand, the sealing surface 75 of the valve body 70 can close the valve hole 51 by coming into contact with the valve seat 52.

(Forward)
As shown in FIG. 6, when the refrigerant flows in the forward direction (arrow AR1), the valve body 70 and the leading member 80 move in the direction of opening the valve hole 51 by receiving the pressure from the refrigerant (in other words). Then, the valve body 70 and the leading member 80 are arranged at positions away from the valve hole 51). A gap S is formed between the first plate-shaped portion 81 and the second plate-shaped portion 72 in a state where the refrigerant is flowing in the forward direction.

The first locking portion 84 formed on the bottom portion 83 of the leading member 80 and the second locking portion 74 formed on the second plate-shaped portion 72 of the valve body 70 are separated from each other. The bottom portion 83 of the leading member 80 and the tubular portion 73 of the valve body 70 are in contact with the stopper 14s. In the state where the valve body 70 is in contact with the stopper 14s, the leading member 80 is arranged on the suction chamber 20 side with respect to the valve hole 51, and does not protrude from the valve hole 51 in the opposite direction.

Refrigerant from an evaporator (not shown) passes through the valve hole 51 and enters the suction chamber 20. Since the surface of the first plate-shaped portion 81 located on the valve seat member 50 side has a spherical shape, the refrigerant can efficiently enter the suction chamber 20 from the suction port 22 with less pressure loss.

(Reverse direction)
As shown in FIG. 7, when the refrigerant flows in the opposite direction (arrow AR2), the leading member 80 receives pressure (fluid pressure) from the refrigerant. This pressure acts as a negative pressure to move the leading member 80 toward the side where the valve hole 51 is located. When the refrigerant enters the gap S between the first plate-shaped portion 81 and the second plate-shaped portion 72, the leading member 80 can efficiently receive pressure from the refrigerant.

As shown in FIG. 8, the leading member 80 moves in the opposite direction (in other words, the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) due to the pressure of the refrigerant. As the leading member 80 approaches the valve seat member 50 (valve hole 51), the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases as the leading member 80 approaches.

When the leading member 80 enters the valve hole 51, the leading member 80 partially closes the valve hole 51. By further reducing the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51, the flow velocity of the refrigerant flowing in the vicinity of the leading member 80 increases, and the leading member 80 is moved to the downstream side. A greater force acts.

When the bottom portion 83 of the leading member 80 comes into contact with the second plate-shaped portion 72 of the valve body 70, the first locking portion 84 and the second locking portion 74 are mutually locked. Since the first locking portion 84 and the second locking portion 74 are mutually locked, the force generated by the movement of the leading member 80 is applied to the valve body 70 through the locking portion.

In the valve body 70, in a state where the first locking portion 84 and the second locking portion 74 are mutually locked, the valve body 70 is pulled by the leading member 80 in the opposite direction (the refrigerant flows in the opposite direction). Moves toward the downstream side in the opposite direction. In the present embodiment, the tubular body 62 allows the valve body 70 to move closer to the valve seat member 50 more stably.

As shown in FIG. 9, the leading member 80 passes through the valve hole 51 in the opposite direction and pulls the valve body 70 to further move in the opposite direction. When the seal surface 75 of the valve body 70 is in contact with the valve seat 52 of the valve seat member 50, the valve hole 51 is closed by the differential pressure through the valve body 70 in contact with the valve seat member 50. In the closed state, the pressure in the space on the suction chamber 20 side with respect to the suction port 22 is higher than the pressure in the space on the joint portion 24 side with respect to the suction port 22. Due to this differential pressure, the valve body 70 continues to be pressed against the valve seat 52, and the leading member 80 (bottom 83) continues to be pressed against the second plate-shaped portion 72 of the valve body 70.

The valve hole 51 is closed by the valve body 70, and the insertion hole 71 of the valve body 70 is closed by the bottom 83 of the leading member 80. The flow of the refrigerant in the opposite direction (arrow AR3) will be restricted.

(Comparison example)
FIG. 10 is a cross-sectional view showing the check valve 40Z in the comparative example. The check valve 40Z includes a valve seat member 50, a valve body 70, a housing 90, and a spring 98. The housing 90 has a tubular portion 91 and a bottom portion 92. A communication hole 91H is formed in the tubular portion 91, and the upper end of the tubular portion 91 is connected to the lower end of the valve seat member 50.

The valve body 70 and the spring 98 are housed inside the housing 90, and the spring 98 urges the valve body 70 in the valve closing direction. The valve body 70, which receives the pressure from the refrigerant flowing in the forward direction, moves against the urging force of the spring 98. When the valve body 70 separates from the valve seat 52, the valve hole 51 opens, and the refrigerant flows to the downstream side such as the suction chamber 20 through the valve hole 51 and the communication hole 91H.

When the check valve 40Z is opened, the spring 98 not only acts in the direction of narrowing the cross-sectional area of the passage through which the refrigerant flowing in the forward direction (arrow AR1) can pass, but also causes a considerable pressure loss of the refrigerant. I am. If the spring 98 is omitted in the configuration of the check valve 40Z, the valve body 70 is moved by the pressure of the refrigerant flowing in the forward direction to open the valve hole 51, and the valve body 70 is opened by the pressure of the refrigerant flowing in the reverse direction. Is moved in the valve closing direction to close the valve hole 51. Since the valve body 70 has a predetermined weight, it is not always easy to stably move the valve body 70 as described above by the pressure of the refrigerant.

(Action and effect of Embodiment 1)
In the check valve 40Z of the comparative example (FIG. 10), the valve body 70 is composed of one member. On the other hand, in the check valve 40 of the first embodiment, a leading member 80 whose relative distance to the valve body 70 in the opening / closing direction of the valve body 70 is variable is connected to the valve body 70.

When the valve is opened, the check valve 40 is not provided with a spring that acts in a direction that narrows the cross-sectional area of the passage through which the refrigerant flows, and the pressure loss of the refrigerant is less than in the case of the comparative example. I'm done. Since the spring that urges the valve body 70 in the valve closing direction is not provided (for example, between the valve body 70 and the cylinder block 14), the check valve 40 can be made lighter and smaller. , It can also contribute to the miniaturization of the entire compressor 10.

Focusing on the operation of transitioning from the valve open state to the valve closed state, when the spring 98 is omitted in the check valve 40Z of the comparative example, one valve body 70 receives the pressure of the refrigerant and enters the valve hole 51. The operation of starting to move toward the valve hole 51 and the operation of contacting the valve seat 52 to close the valve hole 51 are performed.

On the other hand, in the check valve 40 of the first embodiment, the leading member 80 receives the pressure of the refrigerant and starts to move toward the valve hole 51, and the valve body 70 moves as the leading member 80 moves. Moves, and the valve body 70 makes contact with the valve seat 52 in order to close the valve hole 51. In the check valve 40 of the first embodiment, the valve body 70 and the leading member 80 can be easily moved from the valve opening position to the valve closing position by the pressure of the refrigerant, and the leading member can be easily moved from the valve opening position to the valve closing position without using a spring. The valve hole 51 can be opened and closed stably by the cooperation of the 80 and the valve body 70.

In the check valve 40 of the first embodiment, since the leading member 80 does not actually close the valve hole 51, the leading member 80 receives the pressure of the refrigerant and moves toward the valve hole 51. It suffices to have a configuration that can realize the function of starting to start. Therefore, the leading member 80 can be easily configured to be lighter than the case of the valve body 70 of the comparative example, and for example, the leading member 80 may be lighter than the valve body 70.

[Modified Example of Embodiment 1]
FIG. 11 is a cross-sectional perspective view showing the check valve 40A in the modified example of the first embodiment. The check valve 40 in the first embodiment and the check valve 40A in the modified example are different in the following points.

The check valve 40A includes a case body 61. The case body 61 has a tubular portion 62A and a bottom portion 62B. A communication hole 62H is formed in the tubular portion 62A, and the upper end of the tubular portion 62A is connected to the lower end of the valve seat member 50. The inner surface of the bottom 62B constitutes the stopper 14s. According to this configuration, a check valve 40A in which the valve seat member 50, the valve body 70, and the stopper 14s are assembled as one unit can be obtained. Since the inner peripheral surface of the tubular portion 62A is in sliding contact with the outer peripheral surface of the valve body 70, the tubular portion 62A can also function as a guide portion for guiding the movement of the valve body 70.

[Embodiment 2]
FIG. 12 is a cross-sectional view showing the check valve 40B according to the second embodiment. The check valve 40 in the first embodiment and the check valve 40B in the second embodiment are different in the following points.

The valve body 70 of the check valve 40B has a sealing surface 75 and a recess 76, and the leading member 80 is connected to the valve body 70 via a connecting portion 64. Although the leading member 80 has a spherical shape, it may have a flat plate shape (including a disk shape). The diameter of the leading member 80 is smaller than the diameter of the valve hole 51. The connecting portion 64 can be composed of a string and / or a chain. As the material of the connecting portion 64, resin or metal can be adopted. The valve body 70 and the leading member 80 are connected to each other via a connecting portion 64. The leading member 80 is sufficiently lighter than the valve body 70.

(Forward)
As shown in FIG. 12, when the refrigerant flows in the forward direction (arrow AR1), the valve body 70, the connecting portion 64, and the leading member 80 tend to open the valve hole 51 by receiving the pressure from the refrigerant. It moves (in other words, the valve body 70, the connecting portion 64, and the leading member 80 are arranged at positions away from the valve hole 51). In the state where the valve body 70 is in contact with the stopper 14s, the leading member 80 is arranged on the suction chamber 20 side with respect to the valve hole 51, and does not protrude from the valve hole 51 in the opposite direction. Refrigerant from an evaporator (not shown) passes through the valve hole 51 and enters the suction chamber 20.

(Reverse direction)
As shown in FIG. 13, when the refrigerant flows in the opposite direction (arrow AR2), the leading member 80 receives pressure (fluid pressure) from the refrigerant. This pressure acts as a negative pressure to move the leading member 80 toward the side where the valve hole 51 is located.

As shown in FIG. 14, the leading member 80 moves in the opposite direction (in other words, the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) due to the pressure of the refrigerant. As the leading member 80 approaches the valve seat member 50 (valve hole 51), the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases as the leading member 80 approaches.

When the leading member 80 enters the valve hole 51, the leading member 80 partially closes the valve hole 51. By further reducing the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51, the flow velocity of the refrigerant flowing in the vicinity of the leading member 80 increases, and the leading member 80 is moved to the downstream side. A greater force acts. The force generated by the movement of the leading member 80 is applied to the valve body 70 via the connecting portion 64. The valve body 70 moves in the opposite direction (downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) so as to be pulled by the leading member 80 (connecting portion 64).

As shown in FIG. 15, the leading member 80 passes through the valve hole 51 in the opposite direction and pulls the valve body 70 to further move in the opposite direction. At this time, the tubular body 62 may be long so that the valve body 70 is guided by the tubular body 62, or as shown in FIG. 15, after the valve body 70 is separated from the tubular body 62, The outer peripheral surface of the valve body 70 may be configured to be guided by the inner surface of the suction port 22. The valve body 70 may be configured to be always guided by either the tubular body 62 or the inner surface of the suction port 22. When the seal surface 75 of the valve body 70 is in contact with the valve seat 52 of the valve seat member 50, the valve hole 51 is closed by the differential pressure through the valve body 70 in contact with the valve seat member 50. The flow of the refrigerant in the opposite direction (arrow AR3) will be restricted.

(Action and effect of Embodiment 2)
Also in the check valve 40B of the second embodiment, a leading member 80 having a variable relative distance to the valve body 70 in the opening / closing direction of the valve body 70 is connected to the valve body 70. When the valve is opened, the check valve 40B is not provided with a spring that acts in a direction that narrows the cross-sectional area of the passage through which the refrigerant flows, and the pressure loss of the refrigerant is less than in the case of the comparative example. I'm done. Since the spring that urges the valve body 70 in the valve closing direction is not provided (for example, between the valve body 70 and the cylinder block 14), the check valve 40B can be made lighter and smaller. , It can also contribute to the miniaturization of the entire compressor 10.

Also in the check valve 40B of the second embodiment, the leading member 80 performs an operation of starting to move toward the valve hole 51 under the pressure of the refrigerant, and the valve body 70 moves with the movement of the leading member 80. Then, the valve body 70 makes contact with the valve seat 52 in order to close the valve hole 51. Also in the check valve 40B of the second embodiment, the valve body 70 and the leading member 80 can be easily moved from the valve opening position to the valve closing position by the pressure of the refrigerant, and the leading member can be easily moved without using a spring. The valve hole 51 can be opened and closed stably by the cooperation of the 80 and the valve body 70.

[Embodiment 3]
FIG. 16 is a cross-sectional view showing the check valve 40C according to the third embodiment. The check valve 40B in the second embodiment and the check valve 40C in the third embodiment are different in the following points.

The connecting portion 64 of the present embodiment has a first connecting element 65, a second connecting element 66, and a flat plate 67. The first connecting element 65 and the second connecting element 66 can be composed of a string and / or a chain, and resin or metal can be adopted as the material. The flat plate 67 has a disk-like shape and is provided between the first connecting element 65 and the second connecting element 66. The outer diameter of the flat plate 67 is smaller than the diameter of the valve hole 51.

(Forward)
As shown in FIG. 16, when the refrigerant flows in the forward direction (arrow AR1), the valve body 70, the connecting portion 64, and the leading member 80 are in the direction of opening the valve hole 51 by receiving the pressure from the refrigerant. It moves (in other words, the valve body 70, the connecting portion 64, and the leading member 80 are arranged at positions away from the valve hole 51). In the state where the valve body 70 is in contact with the stopper 14s, the leading member 80 is arranged on the suction chamber 20 side with respect to the valve hole 51, and does not protrude from the valve hole 51 in the opposite direction. Refrigerant from an evaporator (not shown) passes through the valve hole 51 and enters the suction chamber 20.

(Reverse direction)
As shown in FIG. 17, when the refrigerant flows in the opposite direction (arrow AR2), the leading member 80 receives pressure (fluid pressure) from the refrigerant. This pressure acts as a negative pressure to move the leading member 80 toward the side where the valve hole 51 is located.

As shown in FIG. 18, due to the pressure of the refrigerant, the leading member 80 moves in the opposite direction (in other words, the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction). As the leading member 80 approaches the valve seat member 50 (valve hole 51), the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases as the leading member 80 approaches.

The force generated by the movement of the leading member 80 is applied to the flat plate 67 via the first connecting element 65. The flat plate 67 moves in the opposite direction (downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) so as to be pulled by the leading member 80 (first connecting element 65). As the flat plate 67 approaches the valve seat member 50 (valve hole 51), the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases as the leading member 80 approaches.

As shown in FIG. 19, the force generated by the movement of the flat plate 67 is applied to the valve body 70 via the second connecting element 66. The leading member 80 passes through the valve hole 51 in the opposite direction and pulls the flat plate 67 to further move in the opposite direction. The valve body 70 moves toward the downstream side in the opposite direction (the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) so as to be pulled by the flat plate 67 (second connecting element 66).

As shown in FIG. 20, when the seal surface 75 of the valve body 70 is in contact with the valve seat 52 of the valve seat member 50, the valve hole 51 is closed by the differential pressure through the valve body 70 in contact with the valve seat member 50. Will be done. The flow of the refrigerant in the opposite direction (arrow AR3) will be restricted.

(Action and effect of Embodiment 3)
Also in the check valve 40C of the third embodiment, a leading member 80 having a variable relative distance to the valve body 70 in the opening / closing direction of the valve body 70 is connected to the valve body 70. When the valve is opened, the check valve 40C is not provided with a spring that acts in a direction that narrows the cross-sectional area of the passage through which the refrigerant flows, and the pressure loss of the refrigerant is less than in the case of the comparative example. I'm done. Since the spring that urges the valve body 70 in the valve closing direction is not provided (for example, between the valve body 70 and the cylinder block 14), the check valve 40C can be made lighter and smaller. , It can also contribute to the miniaturization of the entire compressor 10.

In the check valve 40C of the third embodiment, the leading member 80 receives the pressure of the refrigerant and starts to move toward the valve hole 51, and then the flat plate 67 receives the pressure of the refrigerant. The operation of starting to move toward the valve hole 51 is performed, and then the valve body 70 is in contact with the valve seat 52 in order to close the valve hole 51. Also in the check valve 40C of the third embodiment, the valve body 70 and the leading member 80 can be easily moved from the valve opening position to the valve closing position by the pressure of the refrigerant, and the leading member can be easily moved without using a spring. The valve hole 51 can be stably opened and closed by the cooperation of the 80, the flat plate 67, and the valve body 70. The connecting portion 64 is composed of three members including the flat plate 67. For example, the leading member 80, the flat plate 67, and the valve body 70 can be configured to be heavier in this order.

[Embodiment 4]
FIG. 21 is a cross-sectional view showing the check valve 40D according to the fourth embodiment. The check valve 40B in the second embodiment and the check valve 40D in the fourth embodiment are different in the following points.

The valve body 70 of the check valve 40D has a sealing surface 75, and the leading member 80 is connected to the valve body 70 via a connecting portion 64. The leading member 80 has a hollow cone shape (here, a cone whose bottom surface side is open). The connecting portion 64 can be composed of a rod and / or a flat plate. As the material of the connecting portion 64, resin or metal can be adopted.

(Forward)
As shown in FIG. 22, when the refrigerant flows in the forward direction (arrow AR1), the leading member 80 receives the pressure from the refrigerant, and the connecting portion 64 receives the pressing force from the leading member 80 to the downstream side. As a whole, the deflection, the valve body 70, the connecting portion 64, and the leading member 80 move in the direction of opening the valve hole 51 by receiving the pressure from the refrigerant (in other words, the valve body 70, the connecting portion 64, and the leading member 80 move. As a whole, it is arranged at the position where the valve hole 51 is opened). When the valve body 70 is in contact with the stopper 14s, the leading member 80 does not protrude from the valve hole 51 in the opposite direction. Refrigerant from an evaporator (not shown) passes through the valve hole 51 and enters the suction chamber 20.

(Reverse direction)
As shown in FIG. 23, when the refrigerant flows in the opposite direction (arrow AR2), the leading member 80 receives pressure (fluid pressure) from the refrigerant. This pressure acts to move the leading member 80 in the opposite direction (in other words, the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction). As the leading member 80 moves, the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases. As the leading member 80 further enters the valve hole 51, the leading member 80 further partially closes the valve hole 51.

By further reducing the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51, the flow velocity of the refrigerant flowing in the vicinity of the leading member 80 increases, and the leading member 80 is moved to the downstream side. A greater force acts. The force generated by the movement of the leading member 80 is applied to the valve body 70 via the connecting portion 64. The valve body 70 moves toward the downstream side in the opposite direction (the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) so as to be pulled by the leading member 80 (connecting portion 64).

As shown in FIG. 24, the leading member 80 passes through the valve hole 51 in the opposite direction and pulls the valve body 70 to further move in the opposite direction. When the seal surface 75 of the valve body 70 is in contact with the valve seat 52 of the valve seat member 50, the valve hole 51 is closed by the differential pressure through the valve body 70 in contact with the valve seat member 50. The flow of the refrigerant in the opposite direction (arrow AR3) will be restricted.

(Action and effect of Embodiment 4)
Also in the check valve 40D of the fourth embodiment, a leading member 80 having a variable relative distance to the valve body 70 in the opening / closing direction of the valve body 70 is connected to the valve body 70. Since the spring for urging the valve body 70 in the valve closing direction is not provided (for example, between the valve body 70 and the cylinder block 14), the check valve 40D can be constructed to be lighter and smaller. It can also contribute to the miniaturization of the compressor 10 as a whole.

[Embodiment 5]
FIG. 25 is a cross-sectional view showing the check valve 40E according to the fifth embodiment. In the check valve 40B according to the second embodiment and the check valve 40E according to the fifth embodiment, the leading member 80 of the check valve 40E is composed of a flat plate, and the connecting portion 64 of the check valve 40E is composed of a coil spring. It differs in that.

(Forward)
As shown in FIG. 26, when the refrigerant flows in the forward direction (arrow AR1), the leading member 80 receives the pressure from the refrigerant, and the connecting portion 64 receives the pressing force from the leading member 80 to the downstream side. As a whole, the valve body 70, the connecting portion 64, and the leading member 80 move in the direction of opening the valve hole 51 by receiving the pressure from the refrigerant (in other words, the valve body 70, the connecting portion 64, and the leading member 80). Is placed at the position where the valve hole 51 is opened as a whole). When the valve body 70 is in contact with the stopper 14s, the leading member 80 does not protrude from the valve hole 51 in the opposite direction. Refrigerant from an evaporator (not shown) passes through the valve hole 51 and enters the suction chamber 20.

(Reverse direction)
As shown in FIG. 27, when the refrigerant flows in the opposite direction (arrow AR2), the leading member 80 receives pressure (fluid pressure) from the refrigerant. This pressure acts to move the leading member 80 in the opposite direction (in other words, the downstream side in the opposite direction when the refrigerant is flowing in the opposite direction). As the leading member 80 moves, the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases. When the leading member 80 enters the valve hole 51, the leading member 80 partially closes the valve hole 51.

By reducing the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51, the flow velocity of the refrigerant flowing in the vicinity of the leading member 80 increases, and the leading member 80 attempts to move the leading member 80 to the downstream side. Greater force acts. The force generated by the movement of the leading member 80 is applied to the valve body 70 via the connecting portion 64. The valve body 70 moves in the opposite direction (downstream side in the opposite direction when the refrigerant is flowing in the opposite direction) so as to be pulled by the leading member 80 (connecting portion 64).

As shown in FIG. 28, the leading member 80 passes through the valve hole 51 in the opposite direction and pulls the valve body 70 to further move in the opposite direction. When the seal surface 75 of the valve body 70 is in contact with the valve seat 52 of the valve seat member 50, the valve hole 51 is closed by the differential pressure through the valve body 70 in contact with the valve seat member 50. The flow of the refrigerant in the opposite direction (arrow AR3) will be restricted.

(Action and effect of Embodiment 5)
Also in the check valve 40E of the fifth embodiment, a leading member 80 having a variable relative distance to the valve body 70 in the opening / closing direction of the valve body 70 is connected to the valve body 70. Since the spring that urges the valve body 70 in the valve closing direction is not provided (for example, between the valve body 70 and the cylinder block 14), the check valve 40E can be made lighter and smaller. , It can also contribute to the miniaturization of the entire compressor 10.

[Embodiment 6]
FIG. 29 is a cross-sectional view showing the check valve 40F according to the sixth embodiment. The check valve 40 in the first embodiment and the check valve 40F in the sixth embodiment are different in the following points.

In the check valve 40F, the entire check valve 40F is arranged in the suction port 22. In the check valve 40F, the valve seat member 50 and the support member 68 are press-fitted into the inner wall surface of the suction port 22. The support member 68 has a communication hole 68H. The tubular body 62 is fixed to the surface of the support member 68, and the tubular body 62 is formed with a communication hole 62H. In the present embodiment, the communication hole 73H is also formed in the tubular portion 73 of the valve body 70.

(Forward)
As shown in FIG. 29, when the refrigerant flows in the forward direction (arrow AR1), the valve body 70 and the leading member 80 move in the direction of opening the valve hole 51 by receiving the pressure from the refrigerant (in other words). Then, the valve body 70 and the leading member 80 are arranged at positions away from the valve hole 51).

The first locking portion 84 formed on the bottom portion 83 of the leading member 80 and the second locking portion 74 formed on the second plate-shaped portion 72 of the valve body 70 are separated from each other. The surface 85 of the leading member 80 is in contact with the second plate-shaped portion 72 of the valve body 70. In a state where the valve body 70 is in contact with the stopper 14s, the leading member 80 does not protrude from the valve hole 51 in the opposite direction. The refrigerant from the evaporator (not shown) passes through the valve hole 51, the communication hole 62H, the communication hole 73H, and the communication hole 68H, and enters the suction chamber 20.

(Reverse direction)
As shown in FIG. 30, when the refrigerant flows in the opposite direction (arrow AR2), the leading member 80 receives pressure (fluid pressure) from the refrigerant. This pressure acts to move the leading member 80 toward the side where the valve hole 51 is located. As the leading member 80 approaches the valve seat member 50 (valve hole 51), the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51 gradually decreases as the leading member 80 approaches.

When the leading member 80 enters the valve hole 51, the leading member 80 partially closes the valve hole 51. By further reducing the cross-sectional area of the passage through which the refrigerant can pass in the valve hole 51, the flow velocity of the refrigerant flowing in the vicinity of the leading member 80 increases, and the leading member 80 is moved to the downstream side. A greater force acts.

When the bottom portion 83 of the leading member 80 comes into contact with the second plate-shaped portion 72 of the valve body 70, the first locking portion 84 and the second locking portion 74 are mutually locked. Since the first locking portion 84 and the second locking portion 74 are mutually locked, the force generated by the movement of the leading member 80 is applied to the valve body 70 through the locking portion.

In the valve body 70, in a state where the first locking portion 84 and the second locking portion 74 are mutually locked, the valve body 70 is pulled by the leading member 80 on the downstream side in the opposite direction (the refrigerant is in the opposite direction). It moves toward the downstream side in the opposite direction when it is flowing. The tubular body 62 allows the valve body 70 to move closer to the valve seat member 50 more stably.

As shown in FIG. 31, the leading member 80 passes through the valve hole 51 in the opposite direction and pulls the valve body 70 to further move in the opposite direction. When the seal surface 75 of the valve body 70 is in contact with the valve seat 52 of the valve seat member 50, the valve hole 51 is closed by the differential pressure through the valve body 70 in contact with the valve seat member 50. In the closed state, the pressure in the space on the suction chamber 20 side with respect to the suction port 22 is higher than the pressure in the space on the joint portion 24 side with respect to the suction port 22. Due to this pressure difference, the valve body 70 continues to be pressed against the valve seat 52, and the leading member 80 (bottom 83) continues to be pressed against the second plate-shaped portion 72 of the valve body 70. The valve hole 51 is closed by the valve body 70, and the insertion hole 71 of the valve body 70 is closed by the bottom 83 of the leading member 80. The flow of the refrigerant in the opposite direction (arrow AR3) will be restricted.

(Action and effect of Embodiment 6)
Also in the check valve 40F of the sixth embodiment, it is lighter because the spring for urging the valve body 70 in the valve closing direction is not provided (for example, between the valve body 70 and the cylinder block 14). The check valve 40F can be made smaller and can contribute to the miniaturization of the compressor 10 as a whole.

Also in the check valve 40F of the sixth embodiment, the leading member 80 performs an operation of starting to move toward the valve hole 51 under the pressure of the refrigerant, and the valve body 70 moves with the movement of the leading member 80. Then, the valve body 70 makes contact with the valve seat 52 in order to close the valve hole 51. Also in the check valve 40F of the sixth embodiment, the valve body 70 and the leading member 80 can be easily moved from the valve opening position to the valve closing position by the pressure of the refrigerant, and the leading member can be easily moved without using a spring. The valve hole 51 can be opened and closed stably by the cooperation of the 80 and the valve body 70.

[Embodiment 7]
FIG. 32 is a cross-sectional view showing the check valve 40G according to the seventh embodiment. The check valve 40G of the present embodiment is different from each of the above-described embodiments in that the valve body 70 includes the spring 88. The spring 88 is arranged between the main body portion forming the seal surface 75 of the valve body 70 and the stopper 14s. The spring 88 urges the main body of the valve body 70 toward the valve hole 51, but the valve body 70 closes the valve hole 51 (the valve body 70 contacts the valve seat member 50). In this state), the spring 88 does not urge the main body of the valve body 70. That is, the spring 88 is not for closing the valve hole 51, and is configured to be smaller than the conventionally used spring for closing the valve. Even with the check valve 40G having the above configuration, the check valve 40G can be configured to be lighter and smaller than the conventional check valve equipped with a spring for closing the valve, and the compressor 10 It can contribute to the miniaturization of the whole.

The spring 88 is not limited to the above configuration, and may be configured separately from the valve body 70 and fixed on the recess 14a of the cylinder block 14. In this case, the valve body 70 is configured to be in contact with and detachable from the spring 88, and the portion of the spring 88 in contact with the valve body 70 constitutes the stopper 14s. Even in this configuration, the spring 88 urges the valve body 70 toward the valve hole 51, but when the valve body 70 closes the valve hole 51, the spring 88 attaches the valve body 70. Not momentum. The spring 88 is not for closing the valve hole 51, and is configured to be smaller than the conventionally used spring for closing the valve. Even with the check valve 40G having the above configuration, the check valve 40G can be configured to be lighter and smaller than the conventional check valve equipped with a spring for closing the valve, and the compressor 10 It can contribute to the miniaturization of the whole.

The action and effect of the technical idea disclosed in each of the above-described embodiments is that the spring 88 (a spring that does not urge the valve body 70 in the valve closing direction in the valve closed state) becomes a check valve. It can be obtained even if it is provided. That is, the technical significance of the expression that the spring is not intentionally used does not positively exclude the check valve to which the spring 88 is added from the scope of disclosure or claims of the present specification. ..

Although the embodiments have been described above, the above disclosure contents are examples in all respects and are not restrictive. The technical scope of the present invention is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

10 Compressor, 11,90 housing, 12 rear housing, 12a peripheral wall, 13 front housing, 14 cylinder block, 14a, 14b, 76 recess, 14s stopper, 15 side plate, 15d oil supply passage, 16 rotating shaft, 18 rotor, 18a groove, 19 vanes, 20 suction chambers, 21 compression chambers, 22 suction ports, 23 suction ports, 24 joints, 25 suction pipes, 30 discharge chambers, 31 discharge ports, 32 discharge valves, 34 discharge ports, 35 discharge areas, 36 Oil separator, 37 consecutive passages, 40, 40A, 40B, 40C, 40D, 40E, 40F, 40Z check valve, 50 valve seat member, 51 valve hole, 52 valve seat, 61 case body, 62 tubular body, 62A, 73,91 Cylindrical part, 62B, 83,92 Bottom part, 62H, 68H, 73H, 91H Communication hole, 64 connection part, 65 1st connection element, 66 2nd connection element, 67 flat plate, 68 support member, 70 Valve body, 71 insertion hole, 72 second plate-shaped part, 74 second locking part, 75 sealing surface, 80 leading member, 81 first plate-shaped part, 82 shaft part, 84 first locking part, 85 surface, 88,98 spring, AR1, AR2, AR3 arrow, D51, D75, D81 diameter, S gap.

Claims (8)

A compressor provided with a check valve that allows the refrigerant to flow in the forward direction toward the compression chamber and regulates the flow of the refrigerant in the reverse direction.
A valve seat member that forms a valve hole through which the refrigerant passes,
A valve body which is arranged on the downstream side of the valve seat member in the forward direction and is separated from the valve seat member to open and close the valve hole.
And a stopper on the opposite side of the valve seat member to said valve body,
The movement of the valve body in the opening / closing direction is restricted by the stopper and the valve seat member.
A leading member is connected to the valve body via a connecting portion that makes the relative distance to the valve body variable in the opening / closing direction of the valve body.
The leading member can pass through the valve hole, and when the valve body is in contact with the stopper, the leading member does not protrude from the valve hole in the opposite direction.
When the refrigerant flows in the opposite direction, the leading member passes through the valve hole in the opposite direction and pulls the valve body in the opposite direction by receiving the pressure from the refrigerant. The valve hole is closed by the differential pressure through the valve body that is moved and comes into contact with the valve seat member.
Compressor. The leading member has a first locking portion and has a first locking portion.
The valve body has a second locking portion that locks to the first locking portion.
When the refrigerant flows in the forward direction, the first locking portion and the second locking portion are separated from each other.
When the refrigerant flows in the opposite direction, the leading member moves in the opposite direction, so that the first locking portion and the second locking portion are mutually locked, and the valve. The body moves in the opposite direction in a state where the first locking portion and the second locking portion are mutually locked.
The compressor according to claim 1. The leading member has a first plate-shaped portion and a shaft portion erected on a portion of the first plate-shaped portion opposite to the side on which the valve hole is located.
The valve body is provided on a second plate-shaped portion having an insertion hole through which the shaft portion is inserted and on a portion of the second plate-shaped portion opposite to the side on which the valve hole is located. With a tubular part,
A gap is formed between the first plate-shaped portion and the second plate-shaped portion in a state where the refrigerant is flowing in the forward direction.
The compressor according to claim 1 or 2. The connecting portion is composed of at least one of a string, a chain, a rod, a coil spring and a flat plate.
The compressor according to claim 1. The leading member has a spherical shape, a flat plate shape, or a hollow cone shape.
The compressor according to claim 4. The leading member is configured to be lighter than the valve body.
The compressor according to any one of claims 1 to 5. A guide portion for guiding the movement of the valve body by sliding contact with the valve body is further provided.
The compressor according to any one of claims 1 to 6. A housing having a suction port through which the refrigerant passes and forming a suction chamber inside which communicates with the suction port is provided.
The valve seat member is provided in the suction port and is provided.
The leading member and the valve body are arranged in the suction chamber.
The compressor according to any one of claims 1 to 7.

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