JP2018173019A - Check valve and compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a check valve constructed to further reduce the size of a valve element.SOLUTION: A check valve 40 includes a valve seat member 50, a valve element 60, a valve case 70, and energizing member 80. The valve seat member 50 forms a valve hole 51. The valve element 60 includes a head 61 (a diameter enlarged part) for contacting/leaving the valve seat member 50, and a trunk 62 (a diameter contracted part) having a smaller diameter than the head 61. In the valve case 70, a guide part 71S provided on the opposite side to the side of the valve seat member 50, and a plurality of column parts 74 connecting the guide part 71S to the valve seat member 50 are formed integrally with each other. The guide part 71S slides on the trunk 62 to guide the valve element 60 to be moved in its opening/closing direction. The plurality of column parts 74 each have a predetermined space from the head 61 so that refrigerant from the valve hole 51 passes between the neighboring column parts 74 out of the plurality of column parts 74.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a check valve and a compressor.

  The compressor includes a check valve to prevent the refrigerant from flowing backward. As disclosed in the following Patent Documents 1 and 2, the check valve includes, for example, a valve seat member that forms a valve hole, a valve body that opens and closes the valve hole by being in contact with the valve seat member, and a valve body. An urging member that urges the valve in the valve closing direction and a valve case that accommodates the valve body and the urging member and is coupled to the valve seat member are provided.

  A valve body of a check valve disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2015-140782) includes a disk portion and a cylindrical portion. The disk part has a disk shape that closes the front end of the cylindrical part, and the valve hole is opened and closed when the disk part comes in contact with the valve seat member. The cylindrical portion slides on a part (peripheral wall portion) of the valve case. The valve body is guided by the sliding of the cylindrical portion and the peripheral wall portion, and the movement of the valve body is stabilized.

  In the valve body of the check valve disclosed in Patent Document 1, the outer peripheral surface of the disk portion and the outer peripheral surface of the cylindrical portion have a substantially flush relationship. Similarly, in the valve body (valve core) of the check valve disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2006-191354), the outer peripheral surface of the disk portion and the outer peripheral surface of the cylindrical portion have a substantially flush relationship. Have.

Japanese Patent Laid-Open No. 2015-140782 JP, 2006-191354, A

  In the valve body of the check valve, the disk part (head part of the valve body) has a size and a shape necessary for realizing the function of opening and closing the valve hole. On the other hand, the cylindrical part of the valve body (the body of the valve body) has a size necessary to realize stable movement of the valve body by sliding on a guide part (peripheral wall part) provided in the valve case, and It has a shape.

  The check valves disclosed in Patent Documents 1 and 2 are configured such that the outer peripheral surface of the head and the outer peripheral surface of the body have a substantially flush relationship. It is essential from the viewpoint that the head and the body have different functions and purposes from each other so that the outer surface of the head and the outer surface of the body have a substantially flush relationship. is not.

  Depending on the function and purpose of the head that opens and closes the valve hole, and the function and purpose of the body that realizes stable movement of the valve body by sliding on the peripheral wall of the valve case, the head and body By optimizing the size and shape of the part, it is possible to reduce the size of the entire valve body, and thus to reduce the size of the entire check valve and the compressor etc. on which the check valve is mounted. It becomes possible.

  The present invention has been made in view of the above circumstances, and includes a check valve having a configuration capable of further miniaturizing a valve body, and such a check valve. An object is to provide a compressor.

  A check valve according to the present invention includes a valve seat member having an annular shape and forming a valve hole on the inside, a diameter-enlarged portion that opens and closes the valve hole by being separated from and in contact with the valve seat member, and the diameter-enlargement A valve body having a reduced diameter part smaller than the part, a biasing member that biases the valve body in a direction approaching the valve seat member, and a valve that houses the valve body and the biasing member inside A guide portion provided on the side opposite to the valve seat member side, and a plurality of columnar portions connecting the guide portion to the valve seat member. The guide part slides on the reduced diameter part to guide the movement of the valve body in the opening / closing direction, and the plurality of columnar parts are provided with a predetermined distance between the enlarged diameter part. The refrigerant from the valve hole passes between adjacent columnar portions among the plurality of columnar portions.

  Preferably, in the check valve, the valve case has a bottom portion that connects the plurality of columnar portions on the opposite side of the valve seat member, and the bottom portion is formed on the bottom plate portion and outside the bottom plate portion. And a plurality of the columnar portions connected to an end of the inclined portion opposite to the bottom plate portion, the inclined portion extending toward the valve seat member as the distance from the bottom plate portion increases. Has been.

  Preferably, in the check valve, the guide portion slides on the outer peripheral surface of the reduced diameter portion, and the movement of the valve body is guided by the guide portion sliding on the outer peripheral surface of the reduced diameter portion. The

  Preferably, in the check valve, the reduced diameter portion has a cylindrical shape, and the urging member is disposed inside the reduced diameter portion.

  Preferably, in the check valve, the valve case is provided with a restricting portion that is formed so as to face the urging member from the side and restricts the displacement of the urging member.

  Preferably, in the check valve, a first convex portion having a shape projecting inward is formed at a tip portion of each of the plurality of columnar portions, and an outer peripheral surface of the valve seat member is provided with the first convex portion. The 1st recessed part latched to 1 convex part is formed.

  Preferably, in the check valve, a second convex portion having a shape projecting inward is formed on an inner surface of the first convex portion, and the first concave portion is engaged with the second convex portion. The 2nd recessed part which stops is formed.

  The compressor based on this invention is equipped with said check valve based on this invention, and the housing which forms the refrigerant | coolant channel | path through which a refrigerant | coolant passes inside, The said valve seat member is press-fitted in the inner wall of the said refrigerant | coolant channel | path. Each of the plurality of columnar portions has a distal end portion located between the valve seat member and the inner wall of the refrigerant passage.

  According to the above check valve, since the reduced diameter portion of the valve body guided by the guide portion is formed at a position close to the inside, the valve body can be reduced in size. By reducing the outer shape, it is possible to reduce the size of the check valve as a whole, and to reduce the size of a compressor or the like on which the check valve is mounted.

1 is a cross-sectional view showing a compressor 10 in a first embodiment. It is sectional drawing along the II-II line in FIG. It is sectional drawing along the III-III line in FIG. FIG. 4 is an enlarged sectional view showing a region surrounded by an IV line in FIG. 2, and shows a sectional structure of the check valve 40. FIG. 3 is a front view showing a check valve 40 in the first embodiment. FIG. 3 is a perspective view showing a check valve 40 in the first embodiment. FIG. 3 is a perspective view showing an exploded state of the check valve 40 in the first embodiment. 5 is a perspective view showing a state when the valve case 70 is connected to the valve seat member 50 via a columnar portion 74 with respect to the check valve 40 according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view showing a valve open state of a check valve 40 in the first embodiment. FIG. 3 is a perspective view showing a valve open state of a check valve 40 in the first embodiment. It is sectional drawing which shows the non-return valve 40Z in a comparative example. FIG. 6 is a cross-sectional view showing another mounting mode of check valve 40 in the first embodiment. It is sectional drawing which shows non-return valve 40A in Embodiment 2. FIG. It is sectional drawing which shows the non-return valve 40B in the modification of Embodiment 2. It is sectional drawing which shows nonreturn valve 40C in Embodiment 3. It is sectional drawing which shows non-return valve 40D in Embodiment 4.

  Hereinafter, embodiments will be described with reference to the drawings. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

[Embodiment 1]
(Compressor 10)
FIG. 1 is a cross-sectional view showing a compressor 10 in 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 line III-III in FIG. The compressor 10 is mounted on a vehicle, for example, and used for an air conditioner of the vehicle. Although the compressor 10 is a vane type, the idea disclosed below can also be applied to a scroll type, swash plate type, and roots type compressor.

  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 components thereof, and forms a suction chamber 20 on the inner side. 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 accommodated 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 accommodated inside the groove 18a so as to be able to appear and retract. As the rotary shaft 16 rotates, the rotor 18 rotates. A compression chamber 21 is defined 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). .

  On the outer peripheral surface of the cylinder block 14, a recess 14a is formed over the entire circumference in the circumferential direction of the cylinder block 14 (see FIG. 2). A suction chamber 20 is formed by the recess 14 a 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). A refrigerant passage 22 (here, a suction port) provided in the housing 11 (rear housing 12) communicates with the suction chamber 20. Although details will be described later, a check valve 40 for preventing the refrigerant from flowing back from the suction chamber 20 to the refrigerant passage 22 is provided in the refrigerant passage 22.

  The cylinder block 14 is formed with a pair of suction ports 23 (FIG. 2) communicating with the suction chamber 20. 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 is also provided on the outer peripheral surface of the cylinder block 14 (FIGS. 1 and 3). The discharge chamber 30 is defined by the recess 14b and the inner peripheral surface of the rear housing 12 (the peripheral wall 12a). In the cylinder block 14, a discharge port 31 (FIG. 3) that connects the compression chamber 21 and the discharge chamber 30 is formed. The discharge port 31 is opened and closed by a discharge valve 32. The refrigerant gas compressed in the compression chamber 21 pushes out 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 in the peripheral wall 12 a of the rear housing 12. A capacitor of an external refrigerant circuit (not shown) is connected to the discharge port 34. On the rear side of the rear housing 12, a discharge region 35 (FIG. 1) is defined by the side plate 15. An oil separator 36 is disposed 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 allows the discharge chamber 30 and the oil separator 36 to communicate with each other. An oil supply passage 15 d (FIG. 1) is formed in the side plate 15. The oil supply passage 15d guides the lubricating oil stored at the bottom of the discharge region 35 to the groove 18a (vane groove).

(Check valve 40)
Referring to FIGS. 1 and 2, the refrigerant passage 22 as an intake port is provided so as to penetrate the peripheral wall 12 a of the rear housing 12 (shell), and a cylindrical joint portion 24 is formed outside the refrigerant passage 22. It will be installed continuously. A pipe 25 is connected to the joint portion 24. A refrigerant (refrigerant gas) flows into the refrigerant passage 22 from an evaporator (not shown) through the pipe 25. A check valve 40 is provided in the refrigerant passage 22.

  FIG. 4 is an enlarged cross-sectional view showing a region surrounded by the IV line in FIG. 2, and shows a cross-sectional structure of the check valve 40. 5 and 6 are a front view and a perspective view showing the check valve 40, respectively. FIG. 7 is a perspective view showing an exploded state of the check valve 40. As shown in FIGS. 4 to 7, the check valve 40 includes a valve seat member 50, a valve body 60, a valve case 70, and an urging member 80 (FIG. 4).

  In the following description, the terms inner and outer are defined as follows. That is, the valve hole 51 of the valve seat member 50 (details will be described below) has a central shaft 51C (FIG. 4). The inner side of the arbitrary member means the side of the central axis 51C with respect to the arbitrary member (the side close to the central axis 51C), and the outer side of the arbitrary member means the side of the central axis 51C with respect to the arbitrary member. Means the opposite side (the side far from the central axis 51C).

(Valve seat member 50)
The valve seat member 50 of the check valve 40 has an annular shape and is provided in the refrigerant passage 22. The valve seat member 50 has a valve hole 51 through which refrigerant passes. The valve hole 51 of the present embodiment is a cylindrical space centered on the central axis 51C.

  The valve seat member 50 is provided separately from the member forming the inner wall surface of the refrigerant passage 22 (the rear housing 12 in this embodiment), and is fixed to the inner wall surface of the refrigerant passage 22 by press-fitting (FIG. 4). . A pair of first recesses 53 are formed on the outer peripheral surface 52 of the valve seat member 50. A second recess 54 is formed in each of the pair of first recesses 53.

(Valve 60)
The valve body 60 of the check valve 40 includes a head portion 61 (a diameter-expanded portion) and a body portion 62 (a diameter-reduced portion). The head 61 is formed in a substantially disc shape and has a front surface 63, a back surface 64, and an outer peripheral surface 65. On the surface 63, a bulging portion 63T having a substantially spherical shape is formed. The valve body 60 opens and closes the valve hole 51 by the surface 63 of the head 61 as a diameter-expanded portion coming into contact with the valve seat member 50.

  The body portion 62 is provided on the back surface 64 side of the head portion 61. The body portion 62 is provided in a portion of the back surface 64 that is away from the outer peripheral surface 65 to the inside, and extends in a direction away from the head portion 61. The body portion 62 has a cylindrical shape, and the outer peripheral surface 66 of the body portion 62 has a cylindrical surface shape. The trunk portion 62 has a smaller diameter than the head portion 61. The head 61 forms an enlarged diameter portion of the valve body 60, and the body portion 62 forms a reduced diameter portion of the valve body 60. A hollow space 68 is formed inside the inner peripheral surface 67 of the body portion 62, and the urging member 80 is disposed in the hollow space 68 (inside the body portion 62) (see FIG. 4). In addition, the cross-sectional shape of the head 61 and the trunk | drum 62 is not restricted circularly, An ellipse, an ellipse, etc. may be sufficient.

(Valve case 70)
The valve case 70 includes a guide portion 71, a bottom portion 72, a protruding portion 73, and a plurality of columnar portions 74 (a pair of columnar portions 74 in the present embodiment), and these elements are integrated. The valve case 70 accommodates the valve body 60 and the urging member 80 inside the valve case 70.

  The bottom portion 72 includes a bottom plate portion 72A and a pair of inclined portions 72B and 72C. The bottom plate portion 72A has a shape extending in a flat plate shape, and the pair of inclined portions 72B and 72C are provided on both outer sides in the extending direction of the bottom plate portion 72A. The pair of inclined portions 72B and 72C are located on the opposite sides of the bottom plate portion 72A. The pair of inclined portions 72B, 72C extends from the portion where the pair of inclined portions 72B, 72C are connected to the bottom plate portion 72A toward the outer sides opposite to each other, and the valve seat member as the distance from the bottom plate portion 72A increases. It extends so as to approach 50. The surface of the bottom plate portion 72 </ b> A that faces the body portion 62 functions as a stopper that restricts movement of the valve body 60 in the opening direction by contacting the body portion 62 of the valve body 60. A pair of columnar portions 74 to be described later is connected to the bottom portion 72 on the opposite side of the valve seat member 50.

  The guide portion 71 has a cylindrical shape, is erected on the bottom portion 72, and extends in a direction away from the bottom portion 72. The guide portion 71 and the bottom portion 72 are provided on the side opposite to the side where the valve seat member 50 is located with respect to the valve body 60 (head 61). The guide part 71 includes a body part 62 (reduced diameter part) of the valve body 60 and an urging member 80. The peripheral surface 71S (herein, the inner peripheral surface) of the guide portion 71 slides on the body portion 62 (outer peripheral surface 66) of the valve body 60 to guide the movement of the valve body 60 in the opening / closing direction. The guide part 71 (circumferential surface 71S) is provided at a position closer to the inner side than the columnar part 74 that forms the outline of the valve case 70, and the body part 62 guided by the guide part 71 is also closer to the inner side due to this configuration. It is possible to form in the position.

  The protruding portion 73 is also erected on the bottom portion 72 and extends in a direction away from the bottom portion 72. The protrusion 73 has a columnar shape, and the outer peripheral surface of the protrusion 73 constitutes a restricting portion 73S. The restricting portion 73S is formed so as to face the urging member 80 from the side (facing from the inside in the present embodiment), and restricts displacement of the urging member 80 by contacting the urging member 80. To do.

  One of the pair of columnar portions 74 is connected to an end 77 of the inclined portion 72B opposite to the side where the bottom plate portion 72A is located. The other of the pair of columnar portions 74 is connected to an end 77 of the inclined portion 72C opposite to the side where the bottom plate portion 72A is located. Each of the pair of columnar portions 74 has a shape of a leaf spring and is formed to face each other. The pair of columnar portions 74 extend in parallel from the end portion 77 toward the valve seat member 50 at a position outside the position of the peripheral surface 71 </ b> S of the guide portion 71. The tip 74 </ b> T of each of the pair of columnar portions 74 is connected to the valve seat member 50, whereby the valve case 70 (the guide portion 71 and the bottom portion 72) is connected to the valve seat member 50. In a state where the valve case 70 is connected to the valve seat member 50, the outer peripheral surface of the head 61 of the valve body 60 and the plurality of columnar portions 74 face each other with a predetermined interval (gap), and are mutually opposite. It is configured not to slide.

  FIG. 8 is a perspective view showing a state when the valve case 70 is connected to the valve seat member 50 via the columnar portion 74. In the present embodiment, a first convex portion 75 having a shape protruding inward is formed at each tip portion 74T of the pair of columnar portions 74. The first convex portion 75 is engaged with the first concave portion 53 provided on the outer peripheral surface 52 of the valve seat member 50.

  A second convex portion 76 having a shape protruding inward is formed on the inner surface of the first convex portion 75. The second convex portion 76 is engaged with the second concave portion 54 provided on the outer peripheral surface 52 of the valve seat member 50. At the time of connection, the valve seat member 50 is disposed between the pair of tip portions 74T in a state where the interval between the pair of columnar portions 74 is widened outward. The valve case 70 is connected to the valve seat member 50 by fitting the second convex portion 76 into the second concave portion 54 and fitting the first convex portion 75 into the first concave portion 53.

(Biasing member 80)
Referring to FIG. 4, the urging member 80 includes a spring (coil spring). The urging member 80 is provided between the bottom 72 of the valve case 70 and the head 61 of the valve body 60, and urges the valve body 60 in a direction approaching the valve seat member 50, that is, in a valve closing direction.

(Function and effect)
As shown in FIGS. 9 and 10, when the refrigerant flows, the valve body 60 receives the pressure from the refrigerant to open the valve hole 51 against the urging force of the urging member 80 ( Move in the valve opening direction). The refrigerant flows through the space between the valve hole 51 and the pair of columnar portions 74 (between adjacent columnar portions among the plurality of columnar portions) and flows into the suction chamber 20 (FIGS. 1 and 2) (arrows). AR). When the pressure of the refrigerant (here, the suction pressure) decreases, the valve body 60 moves in the direction of closing the valve hole 51 (the valve closing direction) under the biasing force of the biasing member 80 (FIG. 4).

  The valve hole 51 is closed when the head 61 of the valve body 60 contacts the valve seat member 50. The displacement of the valve case 70 and the biasing member 80 when the valve body 60 moves in the valve opening direction or the valve closing direction is suppressed by the presence of the peripheral surface 71S of the guide portion 71. The peripheral surface 71S of the guide part 71 of the valve case 70 is inside the columnar part 74 and guides the movement of the valve body 60 by sliding on the body part 62 (outer peripheral surface 66) of the valve body 60. As described at the beginning, the head 61 of the valve body 60 has a size and shape necessary for realizing the function of opening and closing the valve hole 51.

  On the other hand, the body portion 62 of the valve body 60 has a size and a shape necessary for realizing stable movement of the valve body by sliding on the peripheral surface 71S of the guide portion 71 provided in the valve case 70. ing. The pair of columnar portions 74 for connecting the valve case 70 to the valve seat member 50 are parallel from the end portion 77 toward the valve seat member 50 at a position outside the position of the peripheral surface 71S of the guide portion 71. It extends to.

  In the valve body 60 of the present embodiment, the outer peripheral surface 65 of the head portion 61 and the outer peripheral surface 66 of the body portion 62 do not have a flush relationship, and the outer peripheral surface 66 has an outer shape compared to the outer shape of the outer peripheral surface 65. The outer shape is smaller. Therefore, the valve body 60 is a lightweight and miniaturized valve body compared to the valve body in the case where the outer peripheral surface 65 of the head 61 and the outer peripheral surface 66 of the body portion 62 have a flush relationship. It is possible to configure. In other words, in the present embodiment, the function of opening and closing the valve hole 51 is given to the head portion 61 of the valve body 60, and the guide portion 71 (circumferential surface 71S) is slid and guided to the body portion 62 of the valve body 60. By providing each function in a distributed manner, it is possible to reduce the outer shape of the body 62 and to configure a miniaturized valve body 60.

(Comparative example)
FIG. 11 is a cross-sectional view showing a check valve 40Z in the comparative example. The check valve 40Z includes a valve seat member 50, a valve body 60Z, an urging member 80, and a valve case 90. The valve case 90 is formed in a bottomed cylindrical shape as a whole, and has a bottom portion 92 and a cylindrical portion 94. A communication hole 96 is formed in the tubular portion 94, and the upper end of the tubular portion 94 is connected to the valve seat member 50.

  In the valve body 60Z of the comparative example, the outer peripheral surface 65 of the head 61 and the outer peripheral surface 66 of the trunk portion 62 are configured to have a flush relationship. With this configuration, the outer shape of the outer peripheral surface 65 is the same as the outer shape of the outer peripheral surface 66, and the outer shape of the outer peripheral surface 66 is limited by the outer shape of the outer peripheral surface 65, thereby reducing the overall size of the valve body 60. Is getting harder.

(Other functions and effects in the first embodiment)
Referring to FIG. 9, in the check valve 40 of the first embodiment, the valve body 60 has the above-described configuration, and a pair of columnar shapes at positions outside the peripheral surface 71 </ b> S of the guide portion 71. A portion 74 is provided. The portion on the lower end side of the pair of columnar portions 74 has little guide function for the valve body 60 (the valve body 60 may be guided by the columnar portion 74 when the valve body 60 is tilted). Therefore, by forming the inclined portions 72 </ b> B and 72 </ b> C on the bottom portion 72, the escape portion 79 can be easily formed on the lower end side of the columnar portion 74. By forming the escape portion 79, for example, the flow path area can be enlarged and the resistance to the fluid can be reduced.

  On the other hand, in the case of the check valve 40Z (FIG. 11), the portion on the lower end side of the cylindrical portion 94 also has a substantial guide function with respect to the valve body 60, and therefore escapes to the lower end side of the cylindrical portion 94. It is difficult to form a portion corresponding to the portion 79. Since the formation of the escape portion 79 leads to downsizing of the lower end side portion of the check valve 40, the check valve 40 can be downsized as a whole as compared with the check valve 40Z. It is.

  Referring to FIG. 12, in the case of the above-described first embodiment (FIG. 2), check valve 40 is provided in refrigerant passage 22 connected to suction chamber 20. The presence of the escape portion 79 (FIG. 9) can facilitate the assembly of the check valve 40 to the compressor 10. As shown in FIG. 12, the check valve 40 can be provided in an arbitrary refrigerant passage 22 in the compressor as long as it is necessary to prevent the refrigerant from flowing in the reverse direction.

  When the check valve 40 is provided in the refrigerant passage 22 formed inside the cylindrical member as shown in FIG. 12, the refrigerant passage 22 is configured by the presence of the escape portion 79 (FIG. 9). The tubular member (for example, the housing 11) can be partially reduced in size, and a space required for arranging the check valve 40 can be reduced. As a result, a compressor and a compressor are mounted. It is also possible to reduce the size of the vehicle to be used. If the cylindrical member (for example, the housing 11) constituting the refrigerant passage 22 is not partially reduced in size, for example, by forming the escape portion 79, for example, the flow passage area is increased and the resistance to the fluid is reduced. can do.

  As shown in FIG. 8, the first convex portion 75 provided on the columnar portion 74 is engaged with the first concave portion 53 provided on the outer peripheral surface 52 of the valve seat member 50. Due to the locking, the valve case 70 (columnar portion 74) moves in the direction of arrow A (a direction parallel to the longitudinal direction of the columnar portion 74) with respect to the valve seat member 50, and the valve case 70 Since rotation in the direction of arrow D about the position of the second convex portion 76 with respect to the member 50 is restricted, the valve case 70 is unlikely to be detached from the valve seat member 50.

  The second convex portion 76 provided on the inner surface of the first convex portion 75 is engaged with the second concave portion 54 of the valve seat member 50. By the locking, the valve case 70 (columnar portion 74) moves in the direction of arrow A with respect to the valve seat member 50, and the valve case 70 (columnar portion 74) moves in the direction of arrow B (with respect to the valve seat member 50). Movement in the width direction of the columnar portion 74 is restricted. By optimizing the amount of penetration of the second convex portion 76 into the second concave portion 54 and the elastic coefficient (secondary moment of section) of the columnar portion 74 in the direction of arrow C, the columnar portion 74 moves in the direction of arrow C (valve seat member). The valve case 70 can be made difficult to come off from the valve seat member 50 even when it is elastically deformed in a direction away from the valve seat 50.

  As shown in FIG. 4, the valve seat member 50 of the check valve 40 is provided separately from the member forming the inner wall surface of the refrigerant passage 22 (the rear housing 12 in the present embodiment). It is fixed to the inner wall surface by press fitting. Each tip 74T of the pair of columnar portions 74 is preferably located between the valve seat member 50 and the inner wall of the refrigerant passage 22. By restricting the inner wall of the refrigerant passage 22 from moving the distal end portion 74T toward the outside, the valve case 70 can be made difficult to come off from the valve seat member 50.

[Embodiment 2]
FIG. 13 is a cross-sectional view showing a check valve 40A in the second embodiment. In the check valve 40 according to the first embodiment, the urging member 80 is disposed inside the body portion 62 of the valve body 60, and the peripheral surface 71 </ b> S (inner peripheral surface) of the guide portion 71 is the outer peripheral surface 66 of the body portion 62. To slide.

  On the other hand, in the check valve 40 </ b> A of the second embodiment, the urging member 80 is disposed outside the body portion 62 of the valve body 60. The protruding portion 71A corresponds to the protruding portion 73 in the first embodiment. In the present embodiment, the protruding portion 71A functions as a guide portion, and the peripheral surface 71S (here, the outer peripheral surface) of the protruding portion 71A slides on the inner peripheral surface 67 of the body portion 62, whereby the valve body 60 is provided. The movement of is guided.

  The inner peripheral surface of the cylindrical portion 73A constitutes a restricting portion 73S. The tubular portion 73A is located on the opposite side of the body 62 of the valve body 60 with the biasing member 80 interposed therebetween. The restricting portion 73S is formed so as to face the urging member 80 from the side (facing from the outside in the present embodiment), and restricts the displacement of the urging member 80 by contacting the urging member 80. To do.

  Even in the check valve 40A having the above-described configuration, the body portion 62 is guided by the projecting portion 71A (circumferential surface 71S) as a guide portion. The outer peripheral surface 66 of the outer peripheral surface 66 is not flush with the outer peripheral surface 66, and the outer peripheral surface 66 has a smaller outer shape than the outer peripheral surface 65. Also in the present embodiment, the function of opening and closing the valve hole 51 to the head 61 of the valve body 60 and the function of being guided by sliding on the guide portion (projecting portion 71A) to the body portion 62 of the valve body 60 are provided. By providing each function in a distributed manner, it is possible to reduce the outer shape of the body portion 62 and configure a miniaturized valve body 60. Therefore, the valve body 60 is lighter and smaller than the valve body in the case where the outer peripheral surface 65 of the head 61 and the outer peripheral surface 66 of the body portion 62 have a flush relationship, for example. Can be configured.

  In the check valve 40A, the urging member 80 is disposed outside the body portion 62, so that it is less affected by the urging member 80 when determining the outer shape of the body portion 62, and compared to the first embodiment. It is easy to make the trunk portion 62 thinner. If the body 62 is made thinner, the check valve 40A can be further reduced in size and weight. When the body part 62 is made thin, the area of the area where the body part 62 and the guide part 71 slide is also reduced. In order to suppress the valve body 60 from being easily inclined, it is also effective to employ the configuration of the check valve 40 in the first embodiment.

(Modification of Embodiment 2)
Like the check valve 40B shown in FIG. 14, the protruding portion 73 as the guide portion may have a cylindrical shape. Even if it is the said structure, the effect | action and effect similar to Embodiment 2 can be acquired, and since the protrusion part 73 is cylindrical, further weight reduction can be achieved.

[Embodiment 3]
FIG. 15 is a cross-sectional view showing a check valve 40C in the third embodiment. In the check valve 40 of the above-described first embodiment (see FIG. 4), the valve seat member 50 is positioned relative to the valve body 60 (head 61) in the guide portion 71 and the bottom portion 72 of the valve case 70. It is provided on the opposite side to the side where it is. In the first embodiment described above, the pair of columnar portions 74 are connected to the inclined portions 72B and 72C of the bottom portion 72, respectively.

  In the present embodiment (see FIG. 15), the bottom portion 72 of the valve case 70 has a flat plate shape and is provided on the side of the guide portion 71 opposite to the side where the valve seat member 50 is located. It is done. The pair of columnar portions 74 are connected to the guide portion 71 and connected to the bottom portion 72 via the guide portion 71. Each of the pair of columnar portions 74 includes an inclined portion 74A and a flat plate portion 74B.

  The inclined portion 74A is connected to an end portion 77A located on the valve seat member 50 side of the guide portion 71, and the inclined portion 74A and the flat plate portion 74B are positioned outside the position of the peripheral surface 71S of the guide portion 71. The end portion 77A extends toward the valve seat member 50 side. Each distal end portion 74T of the pair of columnar portions 74 (flat plate portion 74B) is connected to the valve seat member 50.

  Even in the check valve 40C having the above-described configuration, the body 62 is guided by the peripheral surface 71S (here, the inner peripheral surface) of the guide portion 71, and the outer peripheral surface 65 and the body 62 of the head 61 are guided. The outer peripheral surface 66 of the outer peripheral surface 66 is not flush with the outer peripheral surface 66, and the outer peripheral surface 66 has a smaller outer shape than the outer peripheral surface 65. Also in this embodiment, the head 61 of the valve body 60 has a function of opening and closing the valve hole 51, and the body 62 of the valve body 60 is given a function of being guided by sliding on the guide portion 71. By providing each function in a distributed manner, it is possible to reduce the outer shape of the body portion 62 and configure a miniaturized valve body 60. Therefore, the valve body 60 is lighter and smaller than the valve body in the case where the outer peripheral surface 65 of the head 61 and the outer peripheral surface 66 of the body portion 62 have a flush relationship, for example. Can be configured. The space formed on the lower end side of the columnar portion 74 (flat plate portion 74B) can function as the escape portion 79.

[Embodiment 4]
FIG. 16 is a cross-sectional view showing a check valve 40D in the fourth embodiment. In the check valve 40 of the first embodiment described above, the bottom 72 has the bottom plate portion 72A and the inclined portions 72B and 72C (see FIG. 4), and on the outside of the bottom portion 72 (the lower end side of the columnar portion 74). An escape portion 79 is formed.

  On the other hand, in the check valve 40D of the present embodiment (see FIG. 16), the bottom portion 72 has a flat plate shape, and the relief portion 79 is formed outside the bottom portion 72 (on the lower end 77B side of the columnar portion 74). Corresponding sites are not formed. Even with this configuration, the trunk portion 62 is guided by the guide portion 71, so the outer peripheral surface 65 of the head portion 61 and the outer peripheral surface 66 of the trunk portion 62 do not have a flush relationship, and The outer shape of the outer peripheral surface 66 is smaller than the outer shape. Therefore, the valve body 60 is a lightweight and miniaturized valve body compared to the valve body in the case where the outer peripheral surface 65 of the head 61 and the outer peripheral surface 66 of the body portion 62 have a flush relationship. Can be configured.

[Other embodiments]
In each of the embodiments described above, the valve case 70 has a pair of columnar portions 74, but the valve case 70 may have three or more columnar portions 74. The three or more columnar portions 74 can be arranged, for example, at equal intervals in the circumferential direction.

  Although the embodiment has been described above, the above disclosure is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 10 Compressor, 11 Housing, 12 Rear housing, 12a Perimeter wall, 13 Front housing, 14 Cylinder block, 14a, 14b Recessed part, 15 Side plate, 15d Oil supply passage, 16 Rotating shaft, 18 Rotor, 18a Groove, 19 Vane, 20 Suction chamber, 21 Compression chamber, 22 Refrigerant passage, 23 Suction port, 24 Joint part, 25 Piping, 30 Discharge chamber, 31 Discharge port, 32 Discharge valve, 34 Discharge port, 35 Discharge region, 36 Oil separator, 37 Communication channel , 40, 40A, 40B, 40C, 40D, 40Z Check valve, 50 Valve seat member, 51 Valve hole, 51C Central shaft, 52, 65, 66 Outer peripheral surface, 53 First recess, 54 Second recess, 60, 60Z Valve body, 61 head, 62 body, 63 surface, 63T bulge, 64 back surface, 67 inner peripheral surface, 68 medium Empty space, 70, 90 Valve case, 71 Guide part, 71A, 73 Projection part, 71S Circumferential surface, 72, 92 Bottom part, 72A Bottom plate part, 72B, 72C, 74A Inclined part, 73A, 94 Cylindrical part, 73S Restriction part , 74 Columnar portion, 74B Flat plate portion, 74T Tip portion, 75 First convex portion, 76 Second convex portion, 77, 77A End portion, 77B Lower end, 79 Escape portion, 80 Biasing member, 96 Communication hole, AR arrow.

Claims (8)

A valve seat member having an annular shape and forming a valve hole inside;
A valve body having an enlarged diameter portion that opens and closes the valve hole by being separated from and contacting the valve seat member, and a reduced diameter portion smaller in diameter than the enlarged diameter portion;
A biasing member that biases the valve body in a direction approaching the valve seat member;
A valve case for accommodating the valve body and the biasing member inside, and
The valve case is formed integrally with a guide portion provided on the opposite side of the valve seat member and a plurality of columnar portions connecting the guide portion to the valve seat member,
The guide portion guides the movement of the valve body in the opening / closing direction by sliding on the reduced diameter portion,
The plurality of columnar portions have a predetermined interval between the diameter-enlarged portion, and the refrigerant from the valve hole passes between the adjacent columnar portions among the plurality of columnar portions.
Check valve. The valve case has a bottom portion that connects a plurality of the columnar portions on the opposite side of the valve seat member,
The bottom portion includes a bottom plate portion, and an inclined portion that is provided outside the bottom plate portion and extends so as to approach the valve seat member as the distance from the bottom plate portion increases.
The plurality of columnar portions are connected to an end portion of the inclined portion opposite to the bottom plate portion,
The check valve according to claim 1. The guide portion slides on the outer peripheral surface of the reduced diameter portion,
The movement of the valve body is guided by the guide portion sliding on the outer peripheral surface of the reduced diameter portion,
The check valve according to claim 1 or 2. The reduced diameter portion has a cylindrical shape,
The urging member is disposed inside the reduced diameter portion.
The check valve according to claim 3. The valve case is provided with a restricting portion that is formed so as to face the urging member from the side and restricts the displacement of the urging member.
The check valve according to any one of claims 1 to 4. A first convex portion having a shape projecting inward is formed at the tip of each of the plurality of columnar portions,
On the outer peripheral surface of the valve seat member, a first concave portion that is locked to the first convex portion is formed.
The check valve according to any one of claims 1 to 5. On the inner surface of the first protrusion, a second protrusion having a shape protruding toward the inside is formed,
The first concave portion is formed with a second concave portion that is locked to the second convex portion.
The check valve according to claim 6. A check valve according to any one of claims 1 to 7,
A housing that forms a refrigerant passage through which the refrigerant passes, and
The valve seat member is press-fitted into the inner wall of the refrigerant passage,
Each tip of the plurality of columnar portions is located between the valve seat member and the inner wall of the refrigerant passage,
Compressor.

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