Compressor

Abstract

Disclosed is a compressor (1) comprising: an inner pipe (52) tightly inserted into an outer pipe (50); and a compression mechanism (20) including a suction hole (29) formed by a blind hole extending toward one side of the outer duct (50) and extending to an opening (29c) of the suction hole (29). The inner duct 52 is tightly inserted into the opening 29c. The suction valve 40 includes a suction valve body 42 and a seal 48 attached to the suction valve body 42. The outer diameter of the suction valve body 42 is larger than the outer diameter of the seal 48. The suction valve body 42 is provided with at least one through hole 42c that is exposed when viewed from one side of the seal 48.

Description

TECHNICAL FIELD

[0001] The present application relates to a compressor. BACKGROUND

[0002] It is known that a scroll compressor includes a suction duct extending through a sealed container and connected to a suction hole of a fixed scroll of a compression mechanism, and a suction valve provided in the suction hole, as disclosed in International Publication WO 2017 / 042969 Al hereinafter referred to as PTL 1.

[0003] In PTL 1, the scroll compressor further includes a seal plate as a seal member between a lower end of the suction duct and the suction valve.

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

[0005] Further, since there are various sliding and rotating components inside the scroll compressor, micro particles can be generated when the compressor is operated. Therefore, the micro particles can accumulate on a contact portion of the seal plate that contacts the suction valve, and the micro particles gathered on the surface of the seal plate can 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 prevent micro particles from accumulating on the surface of the suction valve, and that can close the opening of a duct for sucking refrigerant into a compression mechanism in a manner without any gap.

[0007] LIST OF CITATIONS

[0008] PATENT LITERATURE

[0009] PTL 1: International Publication No. WO 2017 / 042969 Al. SUMMARY

[0010] An object of the present application is to provide a compressor including a suction valve that can prevent micro particles from accumulating on the surface of the suction valve, and that can close the opening of an inner duct for sucking refrigerant into a compression mechanism in a manner without any gap.

[0011] To achieve the above object, an embodiment of the present application provides a compressor including: a sealed container; an outer pipe connected from the outside to pass through the sealed container; an inner pipe closely inserted into the outer pipe and disposed in the sealed container; a suction pipe closely inserted into the outer pipe, and through which a refrigerant is sucked; a crank shaft housed in the sealed container; and a compression mechanism housed in the sealed container and configured to compress the refrigerant sucked from the suction pipe by rotation of the crank shaft, the compression mechanism including a suction hole formed by a blind hole extending to an opening of the suction hole; wherein the inner pipe is closely inserted into the opening, wherein the compressor includes a suction valve disposed in the suction hole and configured to allow the refrigerant to flow from the suction pipe into a compression chamber of the compression mechanism; wherein the suction valve includes a suction valve body formed in a hollow cylindrical shape with a bottom, and a seal member formed in a disc shape and attached to the suction valve body on a side facing the opening, an outer diameter of the suction valve body being greater than an outer diameter of the seal member; wherein the seal member is configured to seal an entire end portion of the inner pipe on a side facing the suction valve when the suction valve is closed; and wherein the suction valve body is provided with at least one through hole passing from an inner space of the suction valve body to an outer space of the suction valve body and exposed when viewed from a side of the seal member.

[0012] According to the embodiment of the present application, first, the suction valve disposed in the suction hole is configured to allow the refrigerant to flow from the suction pipe into the compression chamber of the compression mechanism. Thus, the refrigerant from the suction pipe is compressed in the compression chamber of the compression mechanism.

[0013] Second, the outer diameter of the suction valve body is greater than the outer diameter of the seal member, and the suction valve body is provided with at least one through hole passing from an inner space of the suction valve body to an outer space of the suction valve body and exposed when viewed from a side of the seal member. Thus, the refrigerant with the fine particles sucked from the suction pipe flows into the compression chamber through the at least one through hole of the suction valve when the suction valve is open. Thus, it is possible to prevent the fine particles from accumulating on the surface of the suction valve.

[0014] Third, since the seal member is configured to seal the entire end portion of the inner pipe on a side facing the suction valve when the suction valve is closed, the seal member of the suction valve can close the entire end portion of the inner pipe without any gap. Thus, the suction valve prevents the refrigerant with the fine particles from flowing back from the compression chamber (high pressure side) to the suction hole (low pressure side). Thus, this can prevent the fine particles from accumulating on the surface of the suction valve when the suction valve is closed.

[0015] Accordingly, the compressor can prevent the micro-particles from being accumulated on the surface of the suction valve, and can close the opening for sucking the refrigerant into the inner duct of the compression mechanism in a gapless manner. BRIEF DESCRIPTION OF DRAWINGS

[0016] The principles of the application and its advantages will be understood in the following description, which is given with reference to the drawings, in which:

[0017] Figure 1 is a diagram illustrating a schematic configuration of the compressor 1 including the suction valve 40 according to the embodiment of the present application;

[0018] Figure 2A is an enlarged view of the peripheral structure of the suction valve 40, and is a view for illustrating that the suction valve 40 is in an open state;

[0019] Figure 2B is Figure 2A an enlarged view of the peripheral structure of the suction valve 40 of

[0020] Figure 2C is an enlarged view of the peripheral structure of the suction valve 40, and is a view for illustrating that the suction valve 40 is in a closed state;

[0021] Figure 2D is Figure 2C an enlarged view of the peripheral structure of the suction valve 40 of

[0022] Figure 3A is a perspective view of the suction valve 40;

[0023] Figure 3B is a plan view of the suction valve 40;

[0024] Figure 3C is a diagram illustrating a cross section of the suction valve 40 taken along line III-III of Figure 3B from an oblique upper side;

[0025] Figure 3D is a cross-sectional view taken along line III-III of Figure 3B ; and

[0026] Figure 3E is a diagram illustrating the suction valve 40 by a cross section of a seal and a protruding portion of the suction valve 40 taken along line III-III of Figure 3B from an oblique upper side. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and descriptions thereof will be appropriately omitted or simplified. Further, the shape, size, arrangement, and other factors of the components illustrated in the drawings can be changed as appropriate without departing from the scope of the present application.

[0028] Figure 1 is an explanatory diagram illustrating a schematic configuration of a scroll compressor 1 according to an embodiment. The compressor 1 is a fluid machine configured to compress and discharge a fluid (e.g., a gaseous refrigerant), and can be a component of a refrigeration cycle apparatus, for example, a component of a refrigeration cycle apparatus in a refrigerator, a freezer, a vending machine, an air conditioning apparatus, a refrigeration unit, a condensing unit, and a water heater. The compressor 1 according to the embodiment is a vertically installed shell type compressor 1.

[0029] As shown in Figure 1 , the compressor 1 includes a sealed container 10 as a sealed housing, a suction duct 12 installed through to a side surface of the sealed container 10 and formed as a hollow cylindrical duct, a discharge duct 14 discharging a fluid to the outside, a scroll compression mechanism 20 configured to compress a fluid (low-pressure gaseous refrigerant) in a compression chamber 28, and a motor element 30 configured to drive the compression mechanism 20 housed in the sealed container 10.

[0030] An outer periphery of the compression mechanism 20 is fastened to a guide frame 15 by bolts (not shown). An outer periphery of the guide frame 15 is attached to the sealed container 1 by shrink fitting or other methods.

[0031] A sub-frame 16 is provided below the motor element 30. The sub-frame 16 is fixed to an inner peripheral surface of the sealed container 10. The sub-frame 16 radially supports a lower portion of a crankshaft 36 and a peripheral edge of the sub-frame 16 is attached to the sealed container 10. An oil sump 18 is formed on a bottom of the sealed container 10. Refrigerant oil for lubricating sliding components such as bearings is accumulated in the oil sump 18.

[0032] The suction duct 12 configured to suck a fluid (low-pressure gaseous refrigerant) from the outside into the compression mechanism 20 is connected to a side surface of the sealed container 10. The discharge duct 14 configured to discharge a fluid (high-pressure gaseous refrigerant) to the outside of the compressor 1 is connected to a side surface of the sealed container 10.

[0033] The compression mechanism 20 is housed in the sealed container 10 and is configured to compress refrigerant sucked from the suction duct 12 by rotation of the crankshaft 36 rotating by means of the motor element 30. As Figure 1As shown, the compression mechanism 20 includes a fixed scroll 22 and an orbiting scroll 26.

[0034] The fixed scroll 22 is fixed to the intermediate housing 10a at a lower end portion of the fixed scroll 22. The fixed scroll 22 includes a fixed scroll base plate 22a and a fixed scroll body 22b having a involute curve shape and erected on one surface of the fixed scroll base plate 22a. An exhaust port 24 is formed in a central portion of the fixed scroll 22, the exhaust port 24 configured to exhaust compressed fluid.

[0035] The orbiting scroll 26 is configured to orbit relative to the non-rotating fixed scroll 22 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 erected on one surface of the orbiting scroll base plate 26a. An orbiting bearing 26c is formed in a substantially central portion on a lower surface of the orbiting scroll base plate 26a, the orbiting bearing 26c formed in a bottomed cylindrical shape. In order to orbit the orbiting scroll 26, an eccentric shaft portion 36b is inserted in the orbiting bearing 26c, the eccentric shaft portion 36b mounted on an upper end portion of a crankshaft 36, described later.

[0036] The orbiting scroll body 26b is configured to engage with the fixed scroll body 22b to form compression chambers 28 between the fixed scroll body 22b and the orbiting scroll body 26b. The orbiting scroll 26 is configured to orbit relative to the fixed scroll 22.

[0037] Further, as Figure 1 As shown, the compressor 1 includes a compliant frame 17 axially supporting the orbiting scroll 26 and radially supporting a crankshaft 36 driving the orbiting scroll 26, and a guide frame 15 radially supporting the compliant frame 17. As described above, the fixed scroll 22 is attached to the guide frame 17, and its peripheral edge is attached to the sealed container 10.

[0038] The motor element 30 includes an electric motor stator 32 fixed to an inner peripheral surface of the sealed container 10 by shrink fitting or other method, an electric motor rotor 34 rotatably housed on an inner peripheral side of the electric motor stator 32, and the crankshaft 36 (main shaft portion 36a) fixed to the electric motor rotor 34 by shrink fitting or other method. The electric motor stator 32 is connected to glass terminals 38 via wires. The electric motor stator 32 is supplied with electric power from the outside via the glass terminals 38 and the wires. The electric motor rotor 34 is configured to rotate when electric power is supplied to the electric motor stator 32 and transmit driving force to the orbiting scroll 26 through the crankshaft 36.

[0039] An eccentric shaft portion 36b of the crankshaft 36 located above the electric motor rotor 34 is rotatably supported in a radial direction by a cylindrical orbiting bearing 26c mounted below the orbiting scroll base plate 26a. The main shaft portion 36a is fitted in a main bearing 39 and slides along the main bearing 39 by an oil film of lubricating oil, wherein the main bearing 39 is fitted in the compliant frame 17. The eccentric shaft portion 36b, which is eccentric with respect to the main shaft portion 36a, is mounted on an upper end portion of the crankshaft 36.

[0040] A portion of the crankshaft 36 located below the electric motor rotor 24 is rotatably supported by the sub-frame 16.

[0041] A pump element 19, such as a positive displacement pump, is mounted at a lower end portion of the crankshaft 36. The pump element 19 supplies refrigeration machine oil accumulated in the oil sump 18 to sliding components, such as the main bearing 39. The pump element 19 is mounted on the sub-frame 16 and supports the crankshaft 36 in an axial direction on an upper end portion surface of the pump element 19.

[0042] As shown in Figures 2A to 2D , the compression mechanism 20 of the compressor 1 according to the present embodiment includes a suction hole 29 formed by a blind hole extending to an opening 29c of the suction hole 29. The suction hole 29 is formed in a bottomed cylindrical shape. The suction hole 29 includes an end surface 29a on a center side of the compression mechanism 20 as a recessed bottom portion of the bottomed cylindrical shape and the opening 29c of the suction hole 29 formed to be open on one side of the suction duct 12. Refrigerant sucked through the suction duct 12 flows into the suction hole 29.

[0043] As shown in Figure 2A and Figure 2C , the suction hole 29 is formed to extend from a side where the end surface 29a is located to a side where the intermediate housing 10a is located. An inner wall of the suction hole 29 includes a suction hole stepped portion 29b at which a radius of a cross section of the suction hole increases in an axial direction of the suction hole 29 from the side where the end surface 29a is located to the side where the intermediate housing 10a is located.

[0044] As shown in Figure 2A and Figure 2C , the outer duct 50 is a hollow cylindrical duct and is formed to be connected from the outside to pass through the sealed container 10 in a direction of the outer duct 50. An end portion 50a of the outer duct 50 located on a side of the end surface 29a is formed in an annular shape.

[0045] Furthermore, the inner diameter of the outer pipe 50 is the same as the outer diameter of the inner pipe 52 and the suction pipe 12. The suction pipe 12 is tightly inserted into the outer pipe 50. The inner diameter of the outer pipe 50 is larger than the diameter of the opening 29c of the suction hole 29. Therefore, when the outer pipe 50 is inserted into the sealed container 10 in the direction of the suction hole 29, the end 50a of the outer pipe 50 is located at the position where the end 50a contacts the periphery of the opening 29c of the mechanism 20.

[0046] like Figure 2A and Figure 2C As shown, the inner pipe 52 is a hollow cylindrical pipe that is tightly inserted into the outer pipe 50 and the suction port 29 and arranged in the sealed container 10. The end 52a of the inner pipe 52, located on the side where the end surface 29a is located, is formed into an annular shape. Furthermore, the outer wall of the inner pipe 52 includes an inner pipe stepped portion 52b, at which the radius of the suction port cross-section increases in the axial direction of the inner pipe 52 from the side where the end 52a is located toward the side where the intermediate housing 10a is located.

[0047] Between the inner pipe step portion 52b and the opening 29c, the outer diameter of the inner pipe 52 is formed to be the same as the inner diameter of the outer pipe 50 and the inner diameter of the suction hole 29, so that the inner pipe 52 is tightly inserted into the suction hole 29c and the outer pipe 50.

[0048] Since the outer wall of the inner pipe 52 includes an inner pipe step portion 52b, the inner pipe step portion 52b of the inner pipe 52 contacts the suction port step portion 29b of the suction port 29 when the inner pipe 52 is tightly inserted into the suction port 29, and then is located in a predetermined position.

[0049] Regarding the hardness of the inner conduit 52, the outer conduit 50, and the suction conduit 12, the inner conduit 52 is harder than the outer conduit 50, and the suction conduit 12 is harder than the outer conduit 50. For example, the inner conduit 52 and the suction conduit 12 are made of steel, and the outer conduit 50 is made of copper.

[0050] When the inner pipe 52 and / or the suction pipe 12 are inserted into the outer pipe 50, the contact performance between the outer pipe 50 and the inner pipe 52 and / or the outer pipe 50 and the suction pipe 12 is enhanced. Therefore, since the inner pipe 52 and / or the suction pipe 12 are securely installed inside the outer pipe 50, the accuracy of the set position of the inner pipe 52 and / or the suction pipe 12 is improved. This reliably prevents refrigerant leakage from the high-pressure side to the low-pressure side within a specific time period.

[0051] Further, in the present embodiment, the entire end portion 52a of the inner duct 52 is formed in a circular chamfer shape. The entire end portion 52a of the inner duct 52 is formed in a circular chamfer shape, but is not limited to a circular chamfer shape. For example, the entire end portion 52a of the inner duct 52 can be formed in a tapered shape.

[0052] Further, the compressor 1 includes a suction valve 40 arranged in the suction hole 29 and configured to allow the refrigerant to flow from the suction duct 12 into the compression chamber 28 of the compression mechanism 20. The suction valve 40 functions as a check valve such that a force that stops the reverse rotation of the crankshaft 36 is applied to the eccentric shaft portion 36b of the crankshaft 36.

[0053] As shown in FIG. 2, the suction valve 40 includes a suction valve body 42 formed in a bottomed cylindrical shape and a seal 48 formed in a disc shape and attached to the suction valve body 42 on a side facing the opening 29c of the suction hole 29. The outer diameter of the suction valve body 42 is formed to be larger than the outer diameter of the seal 48. Thus, when the suction valve 40 is viewed from the side of the seal 48, the peripheral edge of the suction valve body 42 can be seen outside the seal 48. Figures 3A to 3E

[0054] The suction valve body 42 includes a hollow portion 42a formed in a bottomed hollow cylindrical shape, a protruding portion 44 integrally formed with the suction valve body 42 and configured to move in the suction hole 29 together with the seal 48, and a spring 46 configured to urge the suction valve body 42 in a direction in which the entire end portion 52a of the inner duct 52 is sealed on a side facing the suction valve 40. The spring 46 is formed to cooperate with the recessed end surface 29a of the suction hole 29 and is arranged inside the inner space of the hollow portion 42a.

[0055] In the present embodiment, the suction valve body 42 is provided with four through-holes 42c that penetrate from the inner space of the suction valve body 42 to the outer space of the suction valve body 42 and are exposed when viewed from the side on which the seal 48 is located. When the suction valve 40 is opened, the refrigerant from the suction duct 12 can flow into the inner space in the hollow portion 42a of the suction valve body 42 of the suction valve 40 via the through-holes 42c.

[0056] The number of the through-holes is not limited to four, and for example, at least one through-hole can be provided in the suction valve body 42. In the case where the number of the through-holes 42c is plural, it is preferable that the through-holes are arranged in a symmetrical manner when the suction valve is viewed from the side on which the seal 48 is located. Since the through-holes are arranged in a symmetrical manner, the suction valve 40 operates without tilting, thereby enabling the suction valve 40 to operate stably.

[0057] ​The protruding portion 44 includes a shaft portion 44a formed so as to extend from a seal mounting surface 42b of the suction valve body 42 for mounting the seal 48 on the opposite side of the hollow portion 42a in the axial direction of the suction valve 40, and a head portion 44b connected to the shaft portion 44a and formed in a plate-like shape.

[0058] The protruding portion 44 is formed in a T-shaped cross section in the axial direction of the suction valve 40. Therefore, the seal 48 is firmly fixed to the seal mounting surface 42b of the suction valve body 42 by the protruding portion 44 in a simple structure.

[0059] The seal 48 is formed in a disc-like shape and includes a seal hole 48a provided at a central portion of the seal 48, and the shaft portion 44a is inserted into the seal hole 48a. Further, the seal 48 is configured to seal the entire end portion 52a of the inner pipe 52 on the side facing the suction valve 40 when the suction valve 40 is closed. The seal 48 is made of synthetic resin, but is not limited thereto. For example, the seal 48 can be made of a rubber material.

[0060] The seal peripheral edge 48b of the seal 48 is configured to seal the entire end portion 52a of the inner pipe 52. Further, the seal peripheral edge 48b of the seal 48 is formed in a circular chamfered shape.

[0061] In the present embodiment, since the entire end portion 52a of the inner pipe 52 is formed in a circular chamfered shape, the seal 48 of the suction valve 40 can be smoothly in contact with the entire end portion 52a when the suction valve 40 is closed. Therefore, the seal 48 of the suction valve 40 can close the entire end portion 52a of the inner pipe 52 without any gap.

[0062] In addition, even if the shape of the entire end portion 52a of the inner pipe 52 is changed from a circular chamfered shape to a tapered shape, the seal 48 of the suction valve 40 can be smoothly in contact with the entire end portion 52a when the suction valve 40 is closed. Therefore, the seal 48 can close the entire end portion 52a of the inner pipe 52 without any gap.

[0063] As Figure 3D shown in the present embodiment, the relationship between the height "X" of the through-hole 42c along the axis "A" of the suction valve 40 (see Figure 2A ) and the height "Y" from the through-hole 42c along the axis "A" of the suction valve 40 to the end portion of the suction valve 40 is X / Y < 1. Therefore, it is possible to prevent the operation of the suction valve 40 from becoming unstable.

[0064] Next, the operation of the suction valve 40 will be described in detail with reference to Figures 2A to 2D .

[0065] As shown in Figure 2A and Figure 2B When the suction valve 40 is opened, the suctioned refrigerant flows from the suction pipe 12 into the suction hole 29. The spring 46 is contracted by the force generated by the flow of the suctioned refrigerant to move the suction valve body 42 toward the radially inner side of the compressor 1. By the radially inward movement of the suction valve body 42, since the suction valve body 42 is provided with the through-hole 42c that penetrates from the inner space of the suction valve body 42 to the outer space of the suction valve body 42 and is exposed when viewed from the side of the seal 48, the refrigerant flows from the inner pipe 52 through the through-hole 42c of the suction valve 40 into the inner space inside the suction valve 40, and then flows into the compression chamber 28.

[0066] In this way, the suction valve body 42 can be smoothly moved toward the radially inner side of the compressor 1. Therefore, the refrigerant from the suction pipe 12 is compressed in the compression chamber 28 of the compression mechanism 20.

[0067] Further, since the outer diameter of the suction valve body 42 is larger than the outer diameter of the seal 48, the suctioned refrigerant with the fine particles from the suction pipe 12 flows through the through-hole 42c into the compression chamber 28 when the suction valve is opened. Therefore, it is possible to prevent the fine particles from accumulating on the surface of the suction valve 40.

[0068] As shown in Figure 2C and Figure 2D When the suction valve 40 is closed, the suction valve body 42 is pressed from the radially inner side of the compressor 1 toward the radially outer side of the compressor 1 by the spring force of the spring 46. Further, the crankshaft 36 is reversely rotated due to the pressure difference between the compression chamber 28 and the inner space of the suction valve 40, and thus the high-pressure refrigerant in the compression chamber 28 flows into the inner space of the hollow portion 42a of the suction valve 40. In this way, the pressure in the hollow portion 42a is raised to function as a force for pressing the suction valve body 42 toward the radially outer side of the compressor 1.

[0069] Further, since the seal 48 is configured to seal the entire end portion 52b of the inner pipe 52 located on the side facing the suction valve 40 when the suction valve is closed, the seal 48 of the suction valve 40 can close the entire end portion 52b of the inner pipe 52 in a gapless manner. Therefore, the suction valve 40 prevents the refrigerant with fine particles from flowing back from the compression chamber 28 to the suction hole 29c. Therefore, this can prevent the fine particles from accumulating on the surface of the suction valve 40 when the suction valve 40 is closed.

[0070] Therefore, the compressor 1 can prevent the fine particles from accumulating on the surface of the suction valve 40, and can close the opening of the inner pipe 52 for suctioning the refrigerant to the compression mechanism 20 in a gapless manner.

[0071] Although specific embodiments of the invention have been disclosed, described, and illustrated in the accompanying drawings, this is merely for a better understanding of the principles of the invention and not intended to limit the scope and spirit of the invention. It will be possible and apparent to those skilled in the art that various adjustments and modifications can be made to the structures, such as to the design or materials of the invention, the mounting mechanisms of the various components and elements, or the implementation methods, without departing from the scope of the invention as defined by the claims.

[0072] List of reference numerals

[0073] 1: Compressor

[0074] 10: Sealed container

[0075] 10a: Intermediate shell

[0076] 12: Suction Tube

[0077] 14: Discharge pipe

[0078] 15: Guiding Framework

[0079] 16: Subframe

[0080] 17: Adaptability Framework

[0081] 18: Oil tank

[0082] 19: Pump Components

[0083] 20: Compression mechanism

[0084] 22: Fixed Vortex

[0085] 22a: Fixed vortex base plate

[0086] 22b: Fixed vortex body

[0087] 24: Discharge Port

[0088] 26: Dynamic Vortex

[0089] 26a: Dynamic vortex base plate

[0090] 26b: Dynamic Vortex Body

[0091] 26c: Rotating bearing

[0092] 28: Compression Chamber

[0093] 29: Suction port

[0094] 29a: End surface

[0095] 29b: Stepped section of the suction port

[0096] 29c: opening

[0097] 30: motor element

[0098] 32: electric motor stator

[0099] 34: electric motor rotor

[0100] 36: crankshaft

[0101] 36a: main shaft portion

[0102] 36b: eccentric shaft portion

[0103] 38: glass terminal

[0104] 39: main bearing

[0105] 40: suction valve

[0106] 42: suction valve body

[0107] 42a: hollow portion

[0108] 42b: seal mounting surface

[0109] 42c: through hole

[0110] 44: protrusion

[0111] 44a: shaft portion

[0112] 44b: head portion

[0113] 46: spring

[0114] 48: seal

[0115] 48a: seal bore

[0116] 48b: seal peripheral edge

[0117] 50: outer conduit

[0118] 50a: end of outer conduit

[0119] 52: inner conduit

[0120] 52a: end of inner conduit

[0121] 52b: inner conduit step portion

[0122] A: axis of suction hole

[0123] X: height of through hole along axis of suction valve

[0124] Y: height from through hole to end of suction valve.

Claims

1. A compressor (1) comprising: a sealed container (10); an outer pipe (50) connected from the outside to pass through the sealed container (10); an inner pipe (52) closely inserted into the outer pipe (50) and disposed in the sealed container (10); a suction pipe (12) closely inserted into the outer pipe (50) and through which refrigerant is sucked in; a crankshaft (36) housed in the sealed container (10); and a compression mechanism (20) housed in the sealed container (10) and configured to compress the refrigerant sucked in from the suction pipe (12) by rotation of the crankshaft (36), the compression mechanism (20) including a suction hole (29) formed by a blind hole extending to an opening (29c) of the suction hole (29); wherein the inner pipe (52) is closely inserted into the opening (29c), wherein the compressor (1) includes a suction valve (40) disposed in the suction hole (29) and configured to allow the refrigerant to flow from the suction pipe (12) into a compression chamber (28) of the compression mechanism (20); wherein the suction valve (40) includes a suction valve body (42) formed in a hollow cylindrical shape with a bottom, and a seal (48) formed in a disc shape and attached to the suction valve body (42) on a side facing the opening (29c), an outer diameter of the suction valve body (42) being larger than an outer diameter of the seal (48); wherein the seal (48) is configured to seal an entire end portion (52a) of the inner pipe (52) on a side facing the suction valve (40) when the suction valve (40) is closed; and wherein the suction valve body (42) is provided with at least one through-hole (42c) that penetrates from an inner space of the suction valve body (42) to an outer space of the suction valve body (42) and is exposed when viewed from a side of the seal (48).

2. The compressor (1) of claim 1, wherein A seal peripheral edge (48b) of the seal (48) configured to seal the entire end portion (52a) of the inner pipe (52) is formed in a circular chamfer shape.

3. The compressor (1) of claim 2, wherein The entire end portion (52a) of the inner pipe (52) is formed in a circular chamfer shape or a tapered shape.

4. The compressor (1) of claim 1, wherein, The number of the through-holes (42c) is plural, and the through-holes (42c) are arranged in a symmetrical manner when the suction valve (40) is viewed from the side of the seal (48).

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

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