Discharge valve device for refrigerant compressors

Abstract

A discharge valve device (17) includes: a valve plate (18) including a discharge passage (22) and a valve seat (23) surrounding the discharge passage; a valve housing (24) fixed to the valve plate and including a bottom portion (25) facing away from the valve plate, a sidewall (26) extending from the bottom portion and toward the valve plate, and a discharge port (28) formed in the sidewall; and a valve member (31) displaceable between a closed position and an open position. In the closed position, the valve member closes the discharge passage. In the open position, the valve member opens the discharge passage. The valve housing includes: a gas damping chamber (34) defined by the bottom portion and the sidewall and configured to receive the valve member in the open position; and an exhaust port (37) formed in the bottom portion and exposed in the gas damping chamber.

Description

Technical Field

[0001] The present invention relates to a discharge valve device for a refrigerant compressor (particularly for a refrigerant reciprocating compressor). Background Technology

[0002] As is well known, refrigerant reciprocating compressors include:

[0003] - The cylinder block that limits the cylinder.

[0004] - A valve plate fixed to the cylinder body and closing one end of the cylinder, the valve plate including at least one suction passage exposed in the compression chamber defined by the cylinder and the valve plate and configured to be fluidly connected to the suction chamber of the refrigerant reciprocating compressor, the valve plate also including a discharge port fluidly connected to the compression chamber.

[0005] - A suction valve, configured to allow refrigerant to flow only from the suction chamber toward the compression chamber through at least one suction passage.

[0006] - Valve housing, which is attached to the side of the valve plate away from the cylinder.

[0007] - A central cone, which is attached to the valve housing and faces the cylinder, defines an annular discharge passage together with the discharge port formed in the valve plate.

[0008] - A valve member having a flat annular shape and arranged within the internal space of the valve housing, the valve member being movable between a closed position and an open position; in the closed position, the valve member closes the discharge passage; in the open position, the valve member moves away from the valve plate and opens the discharge passage.

[0009] - A biasing member configured to press the valve member against the valve member, and

[0010] - A piston, which is housed in a cylinder and configured to reciprocate within the cylinder during an intake stroke and a compression stroke; during the intake stroke, refrigerant is drawn into the compression chamber through at least one intake passage; during the compression stroke, the refrigerant is compressed in the compression chamber and then discharged from the compression chamber through a discharge passage.

[0011] Specifically, the valve member closes the discharge passage as long as the cylinder pressure is lower than the sum of the pressure in the discharge chamber and the pressure applied to the valve member by the biasing member. When the cylinder pressure exceeds the sum of the pressure in the discharge chamber and the pressure applied to the valve member by the biasing member, the valve member moves away from the valve plate and opens the discharge passage.

[0012] Because the valve member and biasing member are arranged between the stop surfaces of the valve plate and the valve body, and because the valve member opens at high speed, the sub-assemblies formed by the valve member and biasing member are close to the stop surfaces at each opening of the valve member. This proximity during the opening movement of the valve member generates noise in each piston cycle.

[0013] Furthermore, the discharge valve assembly, consisting of a valve plate, valve body, central cone, valve components, and biasing components, is complex to assemble and expensive to manufacture. Summary of the Invention

[0014] One object of the present invention is to provide an improved refrigerant compressor that overcomes the disadvantages encountered in conventional refrigerant compressors.

[0015] Another object of the present invention is to provide a discharge valve device for a refrigerant compressor that produces less noise and has a lower manufacturing cost.

[0016] According to the present invention, such a discharge valve device, for example for a refrigerant reciprocating compressor, comprises:

[0017] - A valve plate configured to be fixed to a refrigerant compressor, the valve plate including a discharge passage and a valve seat, the discharge passage being configured to be fluidly connected to the compression chamber of the refrigerant compressor, and the valve seat surrounding the discharge passage.

[0018] - A valve housing fixed to a valve plate, the valve housing including a bottom portion facing away from the valve plate and sidewalls extending from the bottom portion and toward the valve plate, the bottom portion and sidewalls defining an internal space, the valve housing also including at least one discharge port formed in the sidewalls of the valve housing and configured to allow compressed gas to flow from a discharge passage toward the discharge chamber of the refrigerant compressor.

[0019] - A valve member having a plate shape and disposed within the internal space of a valve housing, the valve member being displaceable between a closed position and an open position; in the closed position, the valve member abuts against a valve seat and closes the discharge passage; in the open position, the valve member moves away from the valve seat and at least one discharge port is fluidly connected to the discharge passage, and

[0020] - A biasing member configured to press the valve member against the valve seat.

[0021] The valve housing includes a gas damping device, which comprises:

[0022] - A gas damping chamber, defined by a bottom portion and sidewalls of a valve housing, wherein a biasing member is at least partially disposed within the gas damping chamber, and the gas damping chamber is configured to accommodate the valve member when it is in the open position.

[0023] - An exhaust port formed in the bottom portion and exposed in the gas damping chamber, the exhaust port being configured to fluidly connect the gas damping chamber to the discharge chamber of the refrigerant compressor.

[0024] When the valve member moves to the open position and is at least partially contained in the first cavitation, the gas contained in the gas damping chamber flows out of the gas damping chamber only through the exhaust port and the radial clearance between the valve member and the sidewall of the valve body. This causes an increase in the gas pressure within the gas damping chamber, thereby damping the valve member. This damping of the valve member decelerates the valve member and thus avoids impact between the valve member and the bottom surface of the bottom portion.

[0025] The provision of this gas damping device allows for rapid deceleration of the valve member during its opening movement (particularly once the valve member has passed through at least one discharge port formed in the sidewall), thereby avoiding or significantly reducing collisions between the valve member and / or the biasing member and the stop surface of the valve housing during each opening cycle of the valve member.

[0026] Therefore, the noise generated by the discharge valve device is significantly reduced in each compression cycle of the reciprocating piston.

[0027] Furthermore, the construction of the discharge valve device according to the invention reduces the assembly time of the various components of the discharge valve device, and thus simplifies the manufacturing process of the discharge valve device.

[0028] The discharge valve device may also include one or more of the following features, either individually or in combination.

[0029] According to an embodiment of the present invention, the exhaust diameter of the exhaust port is configured to regulate the increase in gas pressure in the gas damping chamber during the opening movement of the valve member, thereby regulating the deceleration of the valve member.

[0030] According to an embodiment of the invention, by allowing gas at discharge pressure to flow from the discharge chamber into the gas damping chamber through the discharge port, the discharge diameter of the discharge port also ensures that the valve components close rapidly at the end of the compression phase of the refrigerant compressor (when the refrigerant compressor is a refrigerant reciprocating compressor, especially at the end of the compression stroke of the compressor piston).

[0031] According to an embodiment of the invention, the valve housing is configured to hold the valve components within the internal space of the valve housing.

[0032] According to an embodiment of the invention, the sidewall of the valve housing is configured to guide the valve member during movement between the closed and open positions.

[0033] According to an embodiment of the present invention, the valve component has a circular plate shape, i.e., a disc shape.

[0034] According to an embodiment of the present invention, the gas damping chamber includes:

[0035] - A first cavitation, defined by the bottom surface of the bottom portion and the sidewall of the valve housing, and the first cavitation at least partially accommodates the biasing member and is configured to accommodate the valve member when it is in the open position, the first cavitation having a first cavitation depth, and

[0036] - A second cavitation is formed in the bottom surface of the bottom portion, an exhaust port is exposed in the second cavitation and configured to fluidly connect the second cavitation to the discharge chamber of the refrigerant compressor, the second cavitation having a second cavitation depth.

[0037] According to an embodiment of the invention, the first cavitation has a circular shape and a first diameter that is larger than, in particular, slightly larger than, the outer diameter of the valve member.

[0038] According to an embodiment of the present invention, the second cavitation has a circular shape and a second diameter smaller than the outer diameter of the valve member.

[0039] According to an embodiment of the invention, the first diameter of the first cavitation is between a minimum diameter value equal to 10 times the sum of the depths of the first and second cavitations and a maximum diameter value equal to 20 times the sum of the depths of the first and second cavitations. This configuration of the first cavitation causes a rapid increase in gas pressure in the gas damping chamber during the opening movement of the valve member, and thus leads to a rapid stop of the valve member.

[0040] According to an embodiment of the present invention, the first cavitation depth of the first cavitation is between a first minimum depth value equal to 0.1 times the valve thickness of the valve member and a first maximum depth value equal to 4 times the displacement stroke of the valve member. The first cavitation depth of the first cavitation is the axial distance between the upper edge of at least one discharge port formed in the sidewall and the bottom surface of the bottom portion of the valve housing.

[0041] According to an embodiment of the present invention, the second cavitation depth is between a second minimum depth value equal to 0.1 times the valve thickness of the valve member and a second maximum depth value equal to 4 times the displacement stroke of the valve member. The depth of the second cavitation is the axial distance between the bottom surface of the bottom portion and the cavitation bottom surface of the second cavitation.

[0042] According to an embodiment of the present invention, the exhaust diameter of the exhaust port is between the minimum exhaust diameter equal to the valve thickness of the valve member and the maximum exhaust diameter equal to four times the displacement stroke of the valve member.

[0043] According to an embodiment of the present invention, the first air cavity and the second air cavity are arranged coaxially.

[0044] According to an embodiment of the present invention, the exhaust port is located at the center of the bottom portion.

[0045] According to an embodiment of the present invention, the exhaust port is coaxially arranged with the first cavitation and the second cavitation.

[0046] According to an embodiment of the present invention, the valve housing has a cup-shaped form.

[0047] According to an embodiment of the invention, the discharge channel disposed on the valve plate has a circular shape. In particular, the discharge channel has a circular shape, unlike in the prior art, where a central conical element is attached to the valve housing and protrudes into the discharge channel. This construction of the discharge valve device reduces its manufacturing cost.

[0048] According to an embodiment of the invention, the valve housing further includes a mounting portion that projects radially from the outer surface of the sidewall of the valve housing, the mounting portion being fixed to the valve plate, for example by rivets arranged in holes formed in the mounting portion.

[0049] According to an embodiment of the present invention, the valve plate includes a first surface and a second surface, the first surface being configured to be oriented toward the compression chamber of the refrigerant compressor, the second surface being opposite to the first surface and oriented toward the valve housing, and a valve seat being disposed on the second surface of the valve plate.

[0050] According to an embodiment of the invention, at least one discharge port is located near the second side of the valve plate.

[0051] According to an embodiment of the invention, at least one discharge port extends in a circumferential direction relative to the axial axis of the valve housing.

[0052] According to an embodiment of the invention, at least one discharge port extends between two adjacent mounting portions.

[0053] According to an embodiment of the present invention, the valve housing includes a plurality of discharge ports distributed around the axial axis of the valve housing.

[0054] According to an embodiment of the present invention, the valve component can be displaced within the internal space in a direction of displacement that is substantially parallel to the axial axis of the valve housing.

[0055] According to an embodiment of the present invention, the sidewall of the valve housing is cylindrical.

[0056] According to an embodiment of the present invention, the sidewall of the valve housing extends vertically from the bottom portion.

[0057] According to an embodiment of the invention, the biasing member is annular and has an outer diameter substantially equal to the outer diameter of the valve member.

[0058] According to embodiments of the present invention, the biasing member may be a helical spring, a wave spring, a bending spring washer, or a wave spring washer. A wave spring may include a single wave loop or may include wave loops stacked and attached to each other in a crest-to-crest configuration.

[0059] According to an embodiment of the present invention, in the open position, the valve component floats within the internal space of the valve housing and is supported only by the biasing component.

[0060] The present invention also relates to a refrigerant compressor, such as a refrigerant reciprocating compressor, including the discharge valve device according to the present invention.

[0061] According to an embodiment of the present invention, a refrigerant reciprocating compressor includes: a sealed housing; an electric motor disposed in the sealed housing and including a stator and a rotor; a drive shaft connected to the rotor; and a reciprocating compression unit disposed in the sealed housing and configured for compressing refrigerant, the reciprocating compression unit including: a cylinder body provided with a cylinder; and a piston that is housed in the cylinder in a reciprocating motion and drivenly connected to the drive shaft.

[0062] According to an embodiment of the present invention, the valve plate of the discharge valve device is fixed to the cylinder body, and the valve plate, cylinder and piston define the compression chamber.

[0063] These and other advantages will become apparent upon reading the following description with reference to the accompanying drawings, which are provided as non-limiting examples to illustrate one embodiment of a refrigerant compressor according to the invention. Attached Figure Description

[0064] The following detailed description of one embodiment of the invention will be better understood when read in conjunction with the accompanying drawings, however, the invention is not limited to the specific embodiments disclosed.

[0065] Figure 1 This is a longitudinal sectional view of a refrigerant reciprocating compressor according to the present invention.

[0066] Figure 2 yes Figure 1 A longitudinal sectional view of the discharge valve assembly of a refrigerant reciprocating compressor, showing the valve component in the closed position.

[0067] Figure 3 yes Figure 2 A longitudinal sectional view of the discharge valve assembly, showing the valve component in the open position.

[0068] Figure 4 yes Figure 2 A perspective view of the valve housing of the discharge valve device.

[0069] Figure 5 yes Figure 2 A cross-sectional perspective view of the discharge valve device. Detailed Implementation

[0070] Figure 1A refrigerant compressor 2, particularly a refrigerant reciprocating compressor, is shown occupying a vertical position. However, the refrigerant compressor 2 according to the invention can occupy an inclined or horizontal position without requiring significant modifications to its structure.

[0071] The refrigerant compressor 2 includes a sealed housing 3, an inlet 4 disposed on the sealed housing 3 and configured to supply refrigerant to be compressed to the refrigerant compressor 2, and an outlet disposed on the sealed housing 3 and configured to discharge the compressed refrigerant.

[0072] The refrigerant compressor 2 also includes: an electric motor 6, which is disposed within a sealed housing 3 and has a rotor 7 and a stator 8 disposed around the rotor 7; and a drive shaft 9, also referred to as a crankshaft, which is vertical and rotatable about a rotation axis A. The drive shaft 9 is coupled to the rotor 7 of the electric motor 6 such that the electric motor 6 is configured to drive the drive shaft 9 to rotate about the rotation axis A.

[0073] The refrigerant compressor 2 also includes a reciprocating compression unit 11, which is disposed in a sealed housing 3 and configured to compress the refrigerant supplied by the suction port 4.

[0074] The reciprocating compression unit 11 includes: a cylinder body 12 having a cylinder 13 that partially defines a compression chamber 14; and a piston 15 housed in the cylinder 13 in a reciprocating motion and drivenly connected to a drive shaft 9 via a connecting rod 16. Specifically, the connecting rod 16 is configured to convert the rotational motion of the drive shaft 9 into the reciprocating motion of the piston 15 within the cylinder 13 along the intake and compression strokes. During the intake stroke, refrigerant is drawn into the compression chamber 14, and during the compression stroke, the refrigerant is compressed in the compression chamber 14 and then discharged from the compression chamber 14.

[0075] The refrigerant compressor 2 also includes a discharge valve device 17 configured to control and guide the intake of refrigerant into the compression chamber 14 and the discharge of compressed refrigerant from the compression chamber 14.

[0076] The discharge valve assembly 17 includes a valve plate 18 fixed to the cylinder body 12, such that the valve plate 18, the cylinder 13, and the piston 15 define a compression chamber 14. According to an embodiment of the invention, the valve plate 18 has a valve thickness of approximately 1.2 mm.

[0077] Valve plate 18 includes a first surface 18.1 oriented toward compression chamber 14 and a second surface 18.2 opposite to the first surface 18.1. Piston 15 is particularly slidably mounted in cylinder 13 between extreme intake and extreme discharge positions; in the extreme intake position, piston 15 is removed from the first surface 18.1 of valve plate 18; in the extreme discharge position, piston 15 is located near the first surface 18.1 of valve plate 18.

[0078] Valve plate 18 includes one or more suction passages 19 and a suction valve (not shown), the suction passages 19 being exposed in the compression chamber 14 and configured to be fluidly connected to the suction chamber 21 of the refrigerant compressor 2, the suction valve being configured to allow refrigerant to flow only from the suction chamber 21 toward the compression chamber 14 through the suction passages(a) 19.

[0079] The valve plate 18 also includes a discharge passage 22 exposed in the compression chamber 14 and extending through the valve thickness of the valve plate 18. Advantageously, the discharge passage 22 has a circular shape and is located in the central portion of the valve plate 18.

[0080] The valve plate 18 also includes a valve seat 23 disposed on a second surface 18.2 of the valve plate 18. Advantageously, the valve seat 23 is annular and surrounds the discharge passage 22.

[0081] The discharge valve assembly 17 also includes a valve housing 24 fixed to the second side 18.2 of the valve plate 18. The valve housing 24 has a cup shape and includes a bottom portion 25 facing away from the valve plate 18 and a cylindrical sidewall 26 extending vertically from the bottom portion 25 toward the valve plate 18.

[0082] The valve housing 24 also includes several (e.g., three) mounting portions 27 that project radially from the outer surface of the sidewall 26 of the valve housing 24. The mounting portions 27 are secured to the valve plate 18, for example, by rivets arranged in holes formed in the mounting portions 27.

[0083] The valve housing 24 also includes a plurality of discharge ports 28 formed in the sidewall 26 of the valve housing 24 and distributed around the axial axis B of the valve housing 24. Each discharge port 28 may, for example, extend circumferentially relative to the axial axis B of the valve housing 24. Advantageously, each discharge port 28 is located near the second surface 18.2 of the valve plate 18 and extends between two adjacent mounting portions 27. The discharge ports 28 are specifically configured to allow the flow of compressed gas from the discharge passage 22 toward the discharge chamber 29 of the refrigerant compressor 2.

[0084] The discharge valve device 17 also includes a valve member 31, which has a plate-like shape and is arranged within an internal space defined by the bottom portion 25 and sidewalls 26 of the valve housing 24. Advantageously, the valve member 31 has a circular plate shape, i.e., a disc shape, and has a valve stroke of approximately 2 mm.

[0085] Valve component 31 can be displaced within its internal space along a displacement direction D, which is approximately parallel to the axial axis B of valve housing 24, and in the closed position (see...). Figure 2 ) and opening location (see Figure 3The valve member 31 moves between the valve seat 23 and the discharge passage 22. In the closed position, the valve member 31 abuts against the valve seat 23 and closes the discharge passage 22. In the open position, the valve member 31 moves away from the valve seat 23 and opens the discharge passage 22 so that the discharge port 28 is fluidly connected to the discharge passage 22. Advantageously, the valve housing 24 is configured to hold the valve member 31 within the internal space of the valve housing 24, and the sidewall 26 of the valve housing 24 is configured to guide the valve member 31 during its displacement between its closed and open positions.

[0086] The discharge valve assembly 17 also includes a biasing member 32 configured to press the valve member 31 against the valve seat 23. Advantageously, the biasing member 32 is annular and has an outer diameter substantially equal to the outer diameter of the valve member 31. The biasing member 32 may be a helical spring, a wave spring, a bending spring washer, or a wave spring washer. A wave spring may include a single wave ring or may include wave rings stacked and attached to each other in a crest-to-crest configuration. Compared to a helical spring with the same stiffness, a crest-to-crest spring allows for a relatively larger stroke while having a reduced overall height in its compressed state.

[0087] According to the invention, the valve housing 24 further includes a gas damping device 33, which includes a gas damping chamber 34 defined by the bottom portion 25 and the sidewall 26 of the valve housing 24 and corresponds to a portion of the internal space of the valve housing 24.

[0088] According to the embodiment shown in the figure, the gas damping chamber 34 includes a first air cavity 35 and a second air cavity 36. The first air cavity 35 has a circular shape and is defined by the bottom surface 25.1 of the bottom portion 25 and the sidewall 26 of the valve housing 24. The second air cavity 36 also has a circular shape and is formed in the bottom surface 25.1 of the bottom portion 25. Advantageously, the first air cavity 35 and the second air cavity 36 are arranged coaxially, and the second air cavity 36 includes an air cavity bottom surface 36.1 parallel to the bottom surface 25.1 of the bottom portion 25.

[0089] The first vent 35 has a first diameter slightly larger than the outer diameter of the valve member 31, and the second vent 36 has a second diameter smaller than the outer diameter of the valve member 31. Advantageously, the first vent 35 at least partially accommodates the biasing member 32 and is configured to accommodate the valve member 31 when the valve member 31 is in the open position.

[0090] The first cavitation 35 has a first cavitation depth H1, which is between a first minimum depth value equal to 0.1 times the valve thickness of the valve member 31 and a first maximum depth value equal to 4 times the displacement stroke of the valve member 31. The second cavitation 36 has a second cavitation depth H2, which is between a second minimum depth value equal to 0.1 times the valve thickness of the valve member 31 and a second maximum depth value equal to 4 times the displacement stroke of the valve member 31. It should be noted that the first cavitation depth H1 of the first cavitation 35 is the axial distance between the upper edge of the discharge port 28 and the bottom surface 25.1 of the bottom portion 25, and the second cavitation depth H2 of the second cavitation 36 is the axial distance between the bottom surface 25.1 of the bottom portion 25 and the cavitation bottom surface 36.1 of the second cavitation 36.

[0091] According to an embodiment of the present invention, the first cavitation depth H1 may be about 1.6 mm, and the second cavitation depth H2 may be about 0.5 mm.

[0092] According to an embodiment of the present invention, the first diameter of the first air cavity 35 is between a minimum diameter value equal to 10 times the sum of the first air cavity depth H1 and the second air cavity depth H2, and a maximum diameter value equal to 20 times the sum of the first air cavity depth H1 and the second air cavity depth H2. According to an embodiment of the present invention, the first diameter of the first air cavity 35 is approximately 32 mm.

[0093] The gas damping device 33 also includes an exhaust port 37 formed in the bottom portion 25 and exposed in the second cavity 36. Advantageously, the exhaust port 37 is arranged coaxially with the first cavity 35 and the second cavity 36. The exhaust port 37 is specifically configured to fluidly connect the second cavity 36 to the discharge chamber 29 of the refrigerant compressor 2.

[0094] According to an embodiment of the present invention, the exhaust diameter of the exhaust port 37 is between a minimum exhaust diameter equal to the valve thickness of the valve member 31 and a maximum exhaust diameter equal to four times the displacement stroke of the valve member 31. The exhaust diameter of the exhaust port 37 may be, for example, about 2.5 mm.

[0095] The operation of the discharge valve device 17 is described below.

[0096] During the compression stroke of piston 15, the pressure in compression chamber 14 increases until it exceeds the sum of the pressure in gas damping chamber 34 (i.e., in discharge chamber 29) and the pressure applied to valve member 31 by biasing member 32. Valve member 31 then moves away from valve plate 18 and opens discharge passage 22. When the upper edge of valve member 31 reaches the upper edge of discharge port 28 (i.e., when valve member 31 is at least partially contained in first cavitation 35), the gas contained in gas damping chamber 34 flows out of gas damping chamber 34 only through exhaust port 37 and a small radial gap between valve member 31 and sidewall 26. This reduced gas passage provides a damping effect that slows valve member 31 and prevents impact between valve member 31 and bottom surface 25.1 of bottom portion 25.

[0097] The exhaust diameter of the exhaust port 37 is specifically configured to regulate the increase in gas pressure within the gas damping chamber 34 during the opening movement of the valve member 31, thereby regulating the deceleration of the valve member 31. By allowing gas at discharge pressure to enter the gas damping chamber 34 from the discharge chamber 29 through the exhaust port 37, the exhaust diameter of the exhaust port 37 also ensures the rapid closing of the valve member 31 at the end of the compression stroke of the piston 15.

[0098] According to another embodiment of the present invention, which is not shown in the figures, the cylinder body 12 may include a plurality of cylinders 13, and the refrigerant compressor 2 may include a plurality of pistons 15, each piston 15 being accommodated in a corresponding cylinder 13 in a reciprocating manner.

[0099] Of course, the present invention is not limited to the embodiments described above by way of non-limiting examples; rather, it includes all embodiments thereof.

Claims

1. A discharge valve device (17) for a refrigerant compressor (2), comprising: - A valve plate (18), the valve plate (18) being configured to be fixed to the refrigerant compressor (2), the valve plate (18) comprising: Discharge passage (22), which is configured to be fluidly connected to the compression chamber (14) of the refrigerant compressor (2); and Valve seat (23) surrounds the discharge passage (22). - A valve housing (24) fixed to the valve plate (18), the valve housing (24) including a bottom portion (25) facing away from the valve plate (18) and a sidewall (26) extending from the bottom portion (25) and toward the valve plate (18), the bottom portion (25) and the sidewall (26) defining an internal space, the valve housing (24) also including at least one discharge port (28), the at least one discharge port (28) being formed in the sidewall (26) of the valve housing (24) and configured to allow the flow of compressed gas from the discharge passage (22) toward the discharge chamber (29) of the refrigerant compressor (2), - A valve component (31), which has a plate shape and is arranged within the internal space of the valve housing (24), the valve component (31) being displaceable between a closed position and an open position. In the closed position, the valve member (31) abuts against the valve seat (23) and closes the discharge passage (22). In the open position, the valve member (31) is away from the valve seat (23), and the at least one discharge port (28) is fluidly connected to the discharge passage (22), and - A biasing member (32), which is configured to press the valve member (31) against the valve seat (23). The valve housing (24) includes a gas damping device (33), which comprises: - A gas damping chamber (34), defined by the bottom portion (25) and the sidewall (26) of the valve housing (24), wherein the biasing member (32) is at least partially disposed within the gas damping chamber (34), and the gas damping chamber (34) is configured to receive the valve member (31) when the valve member (31) is in the open position, and - An exhaust port (37), which is formed in the bottom portion (25) and exposed in the gas damping chamber (34), is configured to fluidly connect the gas damping chamber (34) to the discharge chamber (29) of the refrigerant compressor (2). The discharge port (28) is formed between the lower edge of the sidewall (26) and the second surface (18.2) of the valve plate (18), and the valve plate (18) forms one edge of the discharge port (28). The biasing member (32) is a wave spring, which includes wave loops stacked and attached to each other in a crest-to-crest configuration. The gas damping chamber (34) includes: - A first cavitation cavity (35), defined by the bottom surface (25.1) of the bottom portion (25) and the sidewall (26) of the valve housing (24), and the first cavitation cavity (35) at least partially accommodates the biasing member (32) and is configured to accommodate the valve member (31) when the valve member (31) is in the open position, the first cavitation cavity (35) having a first cavitation depth (H1), and - A second cavitation (36) is formed in the bottom surface (25.1) of the bottom portion (25), the exhaust port (37) is exposed in the second cavitation (36) and is configured to fluidly connect the second cavitation (36) to the discharge chamber (29) of the refrigerant compressor (2), the second cavitation (36) having a second cavitation depth (H2). The first air cavity (35) has a circular shape and a first diameter that is larger than the outer diameter of the valve member (31). The second cavitation cavitation (36) has a circular shape and a second diameter smaller than the outer diameter of the valve member (31). The first air cavity (35) and the second air cavity (36) are arranged coaxially.

2. The discharge valve device (17) according to claim 1, wherein, The valve component has a circular plate shape.

3. The discharge valve device (17) according to claim 1, wherein, The first diameter of the first air cavity (35) is between a minimum diameter value equal to 10 times the sum of the first air cavity depth (H1) and the second air cavity depth (H2) and a maximum diameter value equal to 20 times the sum of the first air cavity depth (H1) and the second air cavity depth (H2).

4. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The first cavitation depth (H1) of the first cavitation (35) is between a first minimum depth value equal to 0.1 times the valve thickness of the valve member and a first maximum depth value equal to 4 times the displacement stroke of the valve member (31).

5. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The second cavitation depth (H2) of the second cavitation (36) is between a second minimum depth value equal to 0.1 times the valve thickness of the valve member (31) and a second maximum depth value equal to 4 times the displacement stroke of the valve member (31).

6. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The exhaust diameter of the exhaust port (37) is between the minimum exhaust diameter, which is equal to the valve thickness of the valve member (31), and the maximum exhaust diameter, which is equal to four times the displacement stroke of the valve member (31).

7. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The exhaust port (37) is located at the center of the bottom portion (25).

8. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The valve housing (24) has a cup-shaped shape.

9. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The discharge channel (22) disposed on the valve plate (18) has a circular shape.

10. The discharge valve device (17) according to any one of claims 1 to 3, wherein, The valve housing (24) also includes a mounting portion (27) that protrudes radially from the outer surface of the sidewall (26) of the valve housing (24) and is fixed to the valve plate (18).

11. A refrigerant compressor (2) comprising a discharge valve device (17) according to any one of claims 1 to 10.

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