compressor

Abstract

The present invention discloses a compressor 1 comprising an inner tube 52 closely inserted into an outer tube 50, and a compression mechanism 20 including an intake port 29 formed from a sealed hole extending to the outer tube 50 side and to the opening 29c of the intake port 29. The inner tube 52 is closely inserted into the opening 29c. The intake valve 40 includes an intake valve body 42 and a seal 48 attached to the intake valve body 42. The outer diameter of the intake valve body 42 is larger than the outer diameter of the seal 48. The intake valve body 42 is provided with at least one through hole 42c that is exposed when viewed from the seal 48 side.

Description

Technical Field

[0001] The present invention relates to a compressor.

Background Art

[0002] As disclosed in International Publication No. 2017 / 042969, hereinafter referred to as Patent Document 1, a scroll compressor including a suction pipe connected to a suction hole of a fixed scroll of a compression mechanism through a sealed container and a suction valve provided in the suction hole is known.

[0003] In Patent Document 1, the scroll compressor also includes a seal plate positioned between the lower end of the suction pipe and the suction valve as a seal.

[0004] At the lower end of the suction pipe, when the suction valve contacts the seal plate, it is difficult to manufacture the suction pipe, the seal plate, and the suction valve with high precision so that the opening of the suction pipe is completely covered. Therefore, a gap may occur between the seal plate and the suction valve, which may cause refrigerant leakage.

[0005] Furthermore, since various sliding parts and rotating parts exist inside the scroll compressor, fine particles are generated during the operation of the compressor. Therefore, there is a risk that the fine particles accumulate on the contact portion of the seal plate that contacts the suction valve, and the fine particles accumulated on the surface of the seal plate may affect the gap between the seal plate and the suction valve.

[0006] Therefore, there is a need to develop a compressor including a suction valve that can not only prevent fine particles from accumulating on the surface of the suction valve but also close the opening of the pipe through which the refrigerant is sucked into the compression mechanism without a gap.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

[0008] The object of the present invention is to provide a compressor that includes an intake valve that can not only prevent fine particles from accumulating on the surface of the intake valve, but also completely close the opening of the inner tube through which the refrigerant is drawn into the compression mechanism. [Means for solving the problem]

[0009] To achieve the above objective, embodiments of the present invention provide a compressor comprising: a sealed container; an outer tube connected from the outside and penetrating the sealed container; an inner tube closely inserted into the outer tube and positioned within the sealed container; an intake pipe closely inserted into the outer tube and through which a refrigerant is drawn; a crankshaft housed within the sealed container; and a compression mechanism housed within the sealed container, including an intake hole formed from a bag hole extending to the opening of the intake hole, for compressing the refrigerant drawn in through the intake pipe via the rotation of the crankshaft, wherein the inner tube is closely inserted into the opening, and the compressor is positioned within the intake hole. The present invention provides a compressor that includes an intake valve that allows refrigerant to flow from an intake pipe into the compression chamber of a compression mechanism, the intake valve comprising an intake valve body formed in the shape of a bottomed hollow cylindrical shape and a seal formed in the shape of a disc and attached to the intake valve body from the side facing the opening, the outer diameter of the intake valve body being larger than the outer diameter of the seal, the seal sealing the entire end of the inner pipe on the side facing the intake valve when the intake valve is closed, and the intake valve body being provided with at least one through hole that penetrates from the internal space of the intake valve body to the external space of the intake valve body and is exposed when viewed from the seal side. [Effects of the Invention]

[0010] According to an embodiment of the present invention, firstly, the intake valve located in the intake port allows the refrigerant to flow from the intake pipe into the compression chamber of the compression mechanism. Therefore, the refrigerant from the intake pipe is compressed in the compression chamber of the compression mechanism.

[0011] Secondly, the outer diameter of the intake valve body is not only larger than the outer diameter of the seal, but the intake valve body is also provided with at least one through-hole that penetrates from the internal space of the intake valve body to the external space of the intake valve body and is exposed when viewed from the seal side. Therefore, when the intake valve is opened, the refrigerant containing particulate matter that is drawn in from the intake pipe flows into the compression chamber through at least one through-hole in the intake valve. As a result, it is possible to prevent particulate matter from accumulating on the surface of the intake valve.

[0012] Thirdly, the seal seals the entire end of the inner tube on the side facing the suction valve when the suction valve is closed, so the seal of the suction valve can completely seal the entire end of the inner tube without any gaps. Therefore, the suction valve prevents the backflow of refrigerant containing particulate matter from the compression chamber (high pressure side) to the suction port (low pressure side). As a result, when the suction valve is closed, it is possible to prevent particulate matter from accumulating on the surface of the suction valve.

[0013] Therefore, the compressor not only prevents particulate matter from accumulating on the surface of the intake valve, but also completely seals the opening of the inner tube through which the refrigerant is drawn into the compression mechanism. [Brief explanation of the drawing]

[0014] The principle and advantages of the present invention will become apparent in the following description with reference to the accompanying drawings. [Figure 1] This is an explanatory diagram showing a schematic configuration of a compressor 1 including an intake valve 40 according to an embodiment of the present invention. [Figure 2A] This is an enlarged view of the surrounding structure of the intake valve 40, showing the intake valve 40 in an open state. [Figure 2B] Figure 2A is an enlarged view of the surrounding structure of the intake valve 40, illustrating the relationship between the seal and the end of the inner tube. [Figure 2C] This is an enlarged view of the surrounding structure of the suction valve 40, and shows the state in which the suction valve 40 is closed. [Figure 2D] Figure 2C is an enlarged view of the surrounding structure of the intake valve 40, illustrating the relationship between the seal and the end of the inner tube. [Figure 3A]It is a perspective view of the suction valve 40. [Figure 3B] It is a plan view of the suction valve 40. [Figure 3C] It is an explanatory view of a cross section cut along the line III-III shown in Fig. 3B, seen obliquely from above. [Figure 3D] It is a cross-sectional view cut along the line III-III shown in Fig. 3B. [Figure 3E] It is an explanatory view of the suction valve 40 of a cross section of the seal and the protrusion of the suction valve 40 cut along the line III-III shown in Fig. 3B, seen obliquely from above.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail while referring to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. Furthermore, the shape, size, arrangement, and other elements of the components shown in the drawings can be changed as appropriate without departing from the scope of the present invention.

[0016] Fig. 1 is an explanatory view showing a schematic configuration of the scroll compressor 1 according to the present embodiment. The compressor 1 is a fluid machine that compresses and discharges a fluid (for example, a gas refrigerant), and can be a component of a refrigeration cycle device used in refrigerators, freezers, vending machines, air conditioners, refrigeration devices, condensation devices, hot water supply devices, and the like. The compressor 1 according to the present embodiment is a vertically placed shell type compressor 1.

[0017] As shown in Fig. 1, the compressor 1 includes a sealed container 10 as a sealed container, a suction pipe 12 attached so as to penetrate the side surface of the sealed container 10 and formed as a hollow cylindrical pipe, a discharge pipe 14 that discharges the fluid to the outside, a scroll compression mechanism 20 that compresses the fluid (low-pressure gas refrigerant) in the compression chamber 28, and a motor element 30 that drives the compression mechanism 20 housed in the sealed container 10.

[0018] The outer periphery of the compression mechanism 20 is fixed to the guide frame 15 by bolts (not shown). The outer periphery of the guide frame 15 is attached to the sealed container 1 by shrink fitting or other methods.

[0019] The sub-frame 16 is provided under the motor element 30. The sub-frame 16 is fixed to the inner peripheral surface of the sealed container 10. The sub-frame 16 radially supports the lower part of the crankshaft 36, and its peripheral part is attached to the sealed container 10. An oil sump 18 is formed at the bottom of the sealed container 10. Refrigerating machine oil for lubricating bearings and other sliding parts accumulates in the oil sump 18.

[0020] The suction pipe 12 that sucks fluid (low-pressure gas refrigerant) into the compression mechanism 20 from the outside is connected to the side surface of the sealed container 10. The discharge pipe 14 that discharges fluid (high-pressure gas refrigerant) to the outside of the compressor 1 is connected to the side surface of the sealed container 10.

[0021] The compression mechanism 20 is housed in the sealed container 10 and compresses the refrigerant sucked from the suction pipe 12 through the rotation of the crankshaft 36 rotated by the motor element 30. As shown in FIG. 1, the compression mechanism 20 includes a fixed scroll 22 and a swing scroll 26.

[0022] The fixed scroll 22 is fixed to the intermediate shell 10a at the lower end of the fixed scroll 22. The fixed scroll 22 includes a fixed scroll base plate 22a and a fixed scroll body 22b having an involute curve shape and rising on one surface of the fixed scroll base plate 22a. A discharge port 24 for discharging the compressed fluid is formed at the central part of the fixed scroll 22.

[0023] The orbiting scroll 26 oscillates opposite the stationary scroll 22 without rotating, by an Oldham mechanism (not shown). The orbiting scroll 26 includes an orbiting scroll base plate 26a and an orbiting scroll body 26b having an involute curve shape and rising on one surface of the orbiting scroll base plate 26a. An orbiting bearing 26c, formed in the shape of a bottomed cylinder, is formed substantially in the center of the lower surface of the orbiting scroll base plate 26a. An eccentric shaft portion 36b, which will be installed at the upper end of a crankshaft 36 (described later), is inserted into the orbiting bearing 26c to orbit the orbiting scroll 26.

[0024] The oscillating scroll body 26b engages with the fixed scroll body 22b, forming a compression chamber 28 between the fixed scroll body 22b and the oscillating scroll body 26b. The oscillating scroll 26 oscillates opposite the fixed scroll 22.

[0025] Furthermore, as shown in Figure 1, the compressor 1 includes a compliant frame 17 that axially supports the orbiting scroll 26 and radially supports the crankshaft 36 that drives the orbiting scroll 26, and a guide frame 15 that radially supports the compliant frame 17. As described above, a fixed scroll 22 is attached to the guide frame 17, and its peripheral portion is attached to the sealed container 10.

[0026] The motor element 30 includes an electric motor stator 32 fixed to the inner surface of the sealed container 10 by shrink-fitting or other means, an electric motor rotor 34 rotatably housed on the inner side of the electric motor stator 32, and a crankshaft 36 (main shaft portion 36a) fixed to the electric motor rotor 34 by shrink-fitting or other means. The electric motor stator 32 is connected to a glass terminal 38 via lead wires. Power is supplied to the electric motor stator 32 from an external source via the glass terminal 38 and lead wires. The electric motor rotor 34 rotates when power is supplied to the electric motor stator 32, transmitting driving force to the oscillating scroll 26 through the crankshaft 36.

[0027] In the crankshaft 36, an eccentric shaft portion 36b located above the electric motor rotor 34 is supported so as to be rotatable in the radial direction by a cylindrical oscillating bearing 26c installed below the oscillating scroll base plate 26a. The main shaft portion 36a is fitted into a main bearing 39 which is fitted into the compliant frame 17, and slides along the main bearing 39 by the lubrication of an oil film. The eccentric shaft portion 36b, which is eccentric with respect to the main shaft portion 36a, is installed at the upper end of the crankshaft 36.

[0028] A portion of the crankshaft 36 located beneath the electric motor rotor 24 is rotatably supported by the subframe 16.

[0029] A pump element 19, for example, a positive displacement pump, is installed at the lower end of the crankshaft 36. The pump element 19 supplies refrigerant oil stored in the oil reservoir 18 to the main bearing 39 and other sliding parts. The pump element 19 is attached to the subframe 16, and its upper end surface supports the crankshaft 36 in the axial direction.

[0030] As shown in Figures 2A to 2D, the compression mechanism 20 of the compressor 1 according to this embodiment includes an intake port 29 formed from a bag hole extending to the opening 29c of the intake port 29. The intake port 29 is formed in the shape of a bottomed cylindrical shape. The intake port 29 includes a recessed end face 29a provided on the central side of the compression mechanism 20 as the bottom of the bottomed cylindrical shape, and an opening 29c of the intake port 29 formed to open on the side of the intake pipe 12. The refrigerant drawn in through the intake pipe 12 flows into the intake port 29.

[0031] As shown in Figures 2A and 2C, the intake port 29 is formed to extend from the end face 29a side to the intermediate shell 10a side. The inner wall of the intake port 29 includes an intake port step 29b in the axial direction of the intake port 29, from the end face 29a side to the intermediate shell 10a side, where the radius of the cross-section of the intake port increases.

[0032] As shown in Figures 2A and 2C, the outer tube 50 is a hollow cylindrical pipe connected from the outside and formed to penetrate the sealed container 10 in the direction of the outer tube 50. The end 50a of the outer tube 50 on the end face 29a side is formed in an annular shape.

[0033] Furthermore, the inner diameter of the outer tube 50 is the same as the outer diameter of the inner tube 52 and the suction tube 12. The suction tube 12 is tightly inserted into the outer tube 50. The inner diameter of the outer tube 50 is larger than the diameter of the opening 29c of the suction hole 29. Therefore, when the outer tube 50 is inserted into the sealed container 10 toward the suction hole 29, the end 50a of the outer tube 50 is positioned so that the end 50a is in contact with the outer circumference of the opening 29c of the mechanism 20.

[0034] As shown in Figures 2A and 2C, the inner tube 52 is a hollow cylindrical pipe that is tightly inserted into the outer tube 50 and the intake port 29 and placed inside the sealed container 10. The end 52a of the inner tube 52 on the end face 29a side is formed in an annular shape. Furthermore, the outer wall of the inner tube 52 includes an inner tube step 52b in the axial direction of the inner tube 52, from the end 52a side to the intermediate shell 10a side, where the radius of the cross-section of the intake port increases.

[0035] The outer diameter of the inner tube 52 is formed to be the same as the inner diameter of the outer tube 50 and the inner diameter of the suction hole 29 between the inner tube step portion 52b and the opening 29c, and the inner tube 52 is tightly inserted into the suction hole 29c and the outer tube 50.

[0036] Since the outer wall of the inner tube 52 includes an inner tube step portion 52b, when the inner tube 52 is closely inserted into the suction hole 29 and positioned in a predetermined location, the inner tube step portion 52b of the inner tube 52 comes into contact with the suction hole step portion 29b of the suction hole 29.

[0037] Regarding the hardness of the inner tube 52, outer tube 50, and suction tube 12, the hardness of the inner tube 52 is higher than that of the outer tube 50, and the hardness of the suction tube 12 is also higher than that of the outer tube 50. For example, the inner tube 52 and suction tube 12 are made of steel, and the outer tube 50 is made of copper.

[0038] Inserting one or both of the inner pipe 52 and the suction pipe 12 into the outer pipe 50 improves the contact characteristics between one or both of the inner pipe 52 and the suction pipe 12 and the outer pipe 50. As a result, one or both of the inner pipe 52 and the suction pipe 12 are firmly fixed within the outer pipe 50, improving the accuracy of the set position of one or both of the inner pipe 52 and the suction pipe 12. Therefore, leakage of refrigerant from the high-pressure side to the low-pressure side is reliably prevented during the specified period.

[0039] Furthermore, in this embodiment, the entire end 52a of the inner tube 52 is formed in a rounded chamfered shape. The entire end 52a of the inner tube 52 is formed in a rounded chamfered shape, but is not limited to this. For example, the entire end 52a of the inner tube 52 may be formed in a tapered shape.

[0040] Furthermore, the compressor 1 includes an intake valve 40 located within the intake port 29, which allows refrigerant to flow from the intake pipe 12 into the compression chamber 28 of the compression mechanism 20. The intake valve 40 functions as a check valve so that a force acting to stop the reverse rotation of the crankshaft 36 acts on the eccentric shaft portion 36b of the crankshaft 36.

[0041] As shown in Figures 3A to 3E, the intake valve 40 includes an intake valve body 42 formed in the shape of a bottomed cylindrical shape, and a seal 48 formed in the shape of a disc and attached to the intake valve body 42 from the side facing the opening 29c of the intake hole 29. The outer diameter of the intake valve body 42 is formed to be larger than the outer diameter of the seal 48. Therefore, when the intake valve 40 is viewed from the seal 48 side, the peripheral edge of the intake valve body 42 is visible on the outside of the seal 48.

[0042] The intake valve body 42 includes a hollow portion 42a formed in the shape of a bottomed cylindrical part, a projection 44 integrally formed with the intake valve body 42 and moving together with the seal 48 inside the intake hole 29, and a spring 46 that biases the intake valve body 42 in a direction that seals the entire end 52a of the inner tube 52 on the side facing the intake valve 40. The spring 46 is formed to fit into the recessed end face 29a of the intake hole 29 and is positioned in the internal space of the hollow portion 42a.

[0043] In this embodiment, the intake valve body 42 is provided with four through-holes 42c that penetrate from the internal space of the intake valve body 42 to the external space of the intake valve body 42 and are exposed when viewed from the seal 48 side. When the intake valve 40 is opened, the refrigerant from the intake pipe 12 can flow into the internal space of the hollow portion 42a of the intake valve body 42 of the intake valve 40 through the through-holes 42c.

[0044] The number of through holes is not limited to four. For example, at least one may be provided in the intake valve body 42. When there are multiple through holes 42c, it is desirable that the through holes be arranged symmetrically when the intake valve is viewed from the seal 48 side. The symmetrical arrangement of the through holes allows the intake valve 40 to operate without tilting, thereby enabling stable operation of the intake valve 40.

[0045] The projection 44 is formed on the seal mounting surface 42b of the intake valve body 42 and extends from the seal mounting surface 42b in the axial direction of the intake valve 40, and includes a shaft portion 44a for mounting the seal 48 on the opposite side of the hollow portion 42a, and a plate-shaped head portion 44b connected to the shaft portion 44a.

[0046] The projection 44 is formed in a T-shape in cross-section in the axial direction of the intake valve 40. Therefore, the seal 48 is securely fixed to the seal mounting surface 42b of the intake valve body 42 by the projection 44, resulting in a simple structure.

[0047] The seal 48 is formed in a disc shape and includes a seal hole 48a in its center, into which the shaft portion 44a is inserted. Furthermore, when the suction valve 40 is closed, the seal 48 seals the entire end 52a of the inner tube 52 on the side facing the suction valve 40. The seal 48 is made of synthetic resin, but is not limited thereto. For example, the seal 48 may be made of rubber.

[0048] The sealing edge 48b of the seal 48 seals the entire end 52a of the inner tube 52. Furthermore, the sealing edge 48b of the seal 48 is formed in a rounded chamfered shape.

[0049] In this embodiment, the entire end 52a of the inner tube 52 is formed in a rounded chamfered shape, so that when the intake valve 40 is closed, the seal 48 of the intake valve 40 can smoothly contact the entire end 52a. Therefore, the seal 48 of the intake valve 40 can completely close the entire end 52a of the inner tube 52 without any gaps.

[0050] Furthermore, even if the overall shape of the end 52a of the inner tube 52 is changed from a rounded chamfered shape to a tapered shape, the seal 48 of the intake valve 40 can still smoothly contact the entire end 52a when the intake valve 40 is closed. Therefore, the seal 48 can completely seal the entire end 52a of the inner tube 52 without any gaps.

[0051] As shown in Figure 3D, in this embodiment, the relationship between the height "X" of the through hole 42c along the axis "A" of the intake valve 40 (see Figure 2A) and the height "Y" from the through hole 42c along the axis "A" of the intake valve 40 to the end of the intake valve 40 is X / Y < 1. Therefore, unstable operation of the intake valve 40 can be prevented.

[0052] Next, the operation of the intake valve 40 will be explained in detail with reference to Figures 2A to 2D.

[0053] As shown in Figures 2A and 2B, while the intake valve 40 is open, the refrigerant drawn in flows from the intake pipe 12 into the intake port 29. The force generated by the flow of the drawn-in refrigerant causes the spring 46 to contract, moving the intake valve body 42 radially inward of the compressor 1. As the intake valve body 42 moves radially inward, a through-hole 42c is formed in the intake valve body 42 that penetrates from the internal space of the intake valve body 42 to the external space of the intake valve body 42 and is exposed when viewed from the seal 48 side. As a result, the refrigerant flows from the inner pipe 52 into the internal space of the intake valve 40 through the through-hole 42c of the intake valve 40, and then flows into the compression chamber 28.

[0054] In this way, the suction valve body 42 can move smoothly radially inward into the compressor 1. Therefore, the refrigerant from the suction pipe 12 is compressed in the compression chamber 28 of the compression mechanism 20.

[0055] Furthermore, since the outer diameter of the suction valve body 42 is larger than the outer diameter of the seal 48, when the suction valve opens, the refrigerant containing fine particles that is drawn in from the suction pipe 12 flows into the compression chamber 28 through the through hole 42c. As a result, it is possible to prevent fine particles from accumulating on the surface of the suction valve 40.

[0056] As shown in Figures 2C and 2D, while the intake valve 40 is closed, the intake valve body 42 is pressed radially outward from the radially inside of the compressor 1 by the spring force of the spring 46. Furthermore, the differential pressure between the compression chamber 28 and the internal space of the intake valve 40 causes the crankshaft 36 to rotate in the opposite direction, thereby causing the high-pressure refrigerant in the compression chamber 28 to flow into the internal space of the hollow portion 42a of the intake valve 40. In this way, the pressure inside the hollow portion 42a increases and acts as a force that presses the intake valve body 42 radially outward from the compressor 1.

[0057] Furthermore, the seal 48 seals the entire end 52b of the inner tube 52 on the side facing the suction valve 40 when the suction valve is closed, so the seal 48 of the suction valve 40 can completely seal the entire end 52b of the inner tube 52 without any gaps. Therefore, the suction valve 40 prevents the backflow of refrigerant containing particulate matter from the compression chamber 28 to the suction port 29c. As a result, when the suction valve 40 is closed, it is possible to prevent particulate matter from accumulating on the surface of the suction valve 40.

[0058] Therefore, the compressor 1 not only prevents fine particles from accumulating on the surface of the intake valve 40, but also completely seals the opening of the inner pipe 52 through which the refrigerant is drawn into the compression mechanism 20.

[0059] Specific embodiments of the present invention have been disclosed and described, and shown in the accompanying drawings, but this is solely for the purpose of a better understanding of the principles of the present invention and not as a limitation of the scope and spirit of the teachings of the present invention. Adaptations and modifications to various structures, such as the design or materials of the present invention, the mounting mechanisms of various parts and elements, or embodiments, are possible and will be apparent to those skilled in the art, without departing from the scope of the present invention as defined by the claims. [Explanation of Symbols]

[0060] 1 Compressor, 10 Sealed container, 10a Intermediate shell, 12 Suction pipe, 14 Discharge pipe, 15 Guide frame, 16 Subframe, 17 Compliant frame, 18 Oil reservoir, 19 Pump element, 20 Compression mechanism, 22 Fixed scroll, 22a Fixed scroll base plate, 22b Fixed scroll body, 24 Discharge port, 26 Oscillating scroll, 26a Oscillating scroll base plate, 26b Oscillating scroll body, 26c Oscillating bearing, 28 Compression chamber, 29 Suction port, 29a End face, 29b Suction port step, 29c Opening, 30 Motor element, 32 Electric motor stator, 34 Electric motor rotor, 36 Crankshaft, 36a Main shaft section, 36b Eccentric shaft section, 38 Glass terminal, 39 Main bearing, 40 Suction valve, 42 Suction valve body, 42a Hollow section, 42b seal mounting surface, 42c through hole, 44 projection, 44a shaft section, 44b head, 46 spring, 48 seal, 48a seal hole, 48b seal periphery, 50 outer tube, 50a end of outer tube, 52 inner tube, 52a end of inner tube, 52b inner tube step, A axis of intake port, X height of through hole along axis of intake valve, Y height from through hole to end of intake valve.

Claims

1. A sealed container (10), An outer tube (50) connected from the outside and penetrating the sealed container (10), An inner tube (52) is closely inserted into the outer tube (50) and placed inside the sealed container (10), The suction pipe (12) is closely inserted into the outer pipe (50) and draws in the refrigerant, A crankshaft (36) is housed in the sealed container (10), A compression mechanism (20) is housed within the sealed container (10) and includes the intake port (29), which is formed from a bag hole extending to the opening (29c) of the intake port (29), and compresses the refrigerant drawn in from the intake pipe (12) through the rotation of the crankshaft (36), A compressor (1) equipped with, The inner tube (52) is tightly inserted into the opening (29c), The compressor (1) includes an intake valve (40) located in the intake port (29), which allows the refrigerant to flow from the intake pipe (12) into the compression chamber (28) of the compression mechanism (20). The intake valve (40) includes an intake valve body (42) formed in the shape of a hollow cylindrical body with a bottom, and a seal (48) formed in the shape of a disc and attached to the intake valve body (42) from the side facing the opening (29c), wherein the outer diameter of the intake valve body (42) is larger than the outer diameter of the seal (48). The seal (48) seals the entire end (52a) of the inner tube (52) on the side facing the suction valve (40) when the suction valve (40) is closed. The compressor (1) is provided with at least one through hole (42c) that penetrates from the internal space of the intake valve body (42) to the external space of the intake valve body (42) and is exposed when viewed from the seal (48) side.

2. The compressor (1) according to claim 1, wherein the sealing peripheral edge (48b) of the seal (48) that seals the entire end (52a) of the inner pipe (52) is formed in a rounded chamfered shape.

3. The compressor (1) according to claim 2, wherein the entire end (52a) of the inner pipe (52) is formed in a rounded chamfered shape or a tapered shape.

4. The compressor (1) according to claim 1, wherein the number of through holes (42c) is multiple, and when the intake valve (40) is viewed from the seal (48) side, the through holes (42c) are arranged symmetrically.

5. The compressor (1) according to claim 1, wherein the relationship between the height (X) of the through hole (42c) along the axis (A) of the intake valve (40) and the height (Y) from the through hole (42c) along the axis of the intake valve (40) to the end of the intake valve (40) is X / Y < 1.

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