Compressor

Abstract

The invention relates to the technical field of refrigeration equipment, and provides a compressor, a valve plate assembly and a compression assembly are installed on the two opposite sides of an end cover correspondingly, the valve plate assembly comprises an exhaust valve plate, a baffle and a balancing weight, the baffle comprises a first fixing part and a bent part fixedly connected with the first fixing part, the first fixing part is fixed to the end cover, the bent part is located on the axial side of an exhaust port, and the balancing weight is arranged on the exhaust port. The bending part is bent towards one side far away from the end cover along the axial direction; the balancing weight is installed on the side, back to the exhaust port, of the bent part. The exhaust valve plate comprises a second fixing part and a swing part connected with the second fixing part, the second fixing part is clamped between the first fixing part and the end cover, the swing part is located between the bending part and the exhaust port, and the swing part can elastically deform to open or shield the exhaust port. And the balancing weight enables the mass of the bending part to be relatively increased, the noise volume peak value area of the baffle is adjusted to a low-frequency area, and then the noise volume of the compressor is reduced when the compressor normally operates.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a compressor. Background Art

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, compresses it by driving a piston through the operation of an electric motor, and then discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] Generally, inside the compressor, the electric motor drives the compression assembly to cause the crankshaft to rotate, resulting in a change in the cylinder volume. Due to the change in pressure inside the cylinder, during the compression stroke, as the cylinder volume shrinks, the compressed air is discharged through the exhaust valve.

[0004] At the exhaust valve, generally, a baffle and an exhaust valve plate are provided. The exhaust valve plate continuously opens and closes at the exhaust port under the action of the air flow. The baffle is used to limit the opening and closing degree of the exhaust valve plate. The exhaust valve plate continuously collides with the baffle during the opening and closing process, causing the baffle to vibrate and generate noise. Moreover, as the compressor starts and the crankshaft maintains a high rotational speed, the frequency of the exhaust valve plate hitting the baffle increases, resulting in the baffle continuously vibrating at a high frequency. And when the common baffle vibrates at a high frequency, the noise decibels generated by it are also at the peak value. This leads to continuous, high-pitched, and high-volume noise generated by the compressor during high-speed operation. The sharp high-frequency noise affects people's working or living environment.

[0005] Therefore, there is an urgent need for a compressor to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a compressor that can adjust the peak volume of the baffle to the low-frequency region, so that the noise volume is reduced when the compressor operates normally.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A compressor, comprising:

[0009] An end cover, the end cover is provided with an exhaust port;

[0010] A compression assembly, the air outlet of the compression assembly is communicated with the exhaust port;

[0011] Valve plate assembly, the above-mentioned valve plate assembly is installed on the side of the above-mentioned end cover facing away from the above-mentioned compression assembly. The above-mentioned valve plate assembly includes an exhaust valve plate, a baffle plate and a counterweight. The above-mentioned baffle plate includes a first fixing portion and a bent portion fixedly connected thereto. The above-mentioned first fixing portion is fixed to the above-mentioned end cover, and the above-mentioned bent portion is located on the axial side of the above-mentioned exhaust port. The above-mentioned bent portion bends away from the above-mentioned end cover along the above-mentioned axis; the above-mentioned counterweight is installed on the side of the above-mentioned bent portion facing away from the above-mentioned exhaust port; the above-mentioned exhaust valve plate includes a second fixing portion and a swinging portion connected thereto. The above-mentioned second fixing portion is clamped between the above-mentioned first fixing portion and the above-mentioned end cover, and the above-mentioned swinging portion is located between the above-mentioned bent portion and the above-mentioned exhaust port. The above-mentioned swinging portion can elastically deform to open or block the above-mentioned exhaust port.

[0012] As a preferred technical solution of the above-mentioned compressor, a support boss is convexly provided on the periphery of the above-mentioned exhaust port, and the above-mentioned swinging portion can abut against the above-mentioned support boss.

[0013] As a preferred technical solution of the above-mentioned compressor, the above-mentioned support boss is an elastic buffer member.

[0014] As a preferred technical solution of the above-mentioned compressor, the above-mentioned end cover is provided with a groove, the above-mentioned exhaust port is opened at the bottom of the above-mentioned groove, and both the above-mentioned baffle plate and the above-mentioned exhaust valve plate are installed in the above-mentioned groove.

[0015] As a preferred technical solution of the above-mentioned compressor, the central position of the above-mentioned counterweight is consistent with the central position of the above-mentioned bent portion.

[0016] As a preferred technical solution of the above-mentioned compressor, the weight ratio of the above-mentioned counterweight to the above-mentioned baffle plate is 10% to 50%.

[0017] As a preferred technical solution of the above-mentioned compressor, a buffer layer is provided on the side of the above-mentioned bent portion facing the above-mentioned exhaust port, and the above-mentioned buffer layer can contact the above-mentioned exhaust valve plate.

[0018] As a preferred technical solution of the above-mentioned compressor, the above-mentioned counterweight is welded to the above-mentioned bent portion.

[0019] As a preferred technical solution of the above-mentioned compressor, the above-mentioned counterweight and the above-mentioned bent portion are integrally stamped.

[0020] As a preferred technical solution of the above-mentioned compressor, the above-mentioned baffle plate is provided with a sliding groove on the above-mentioned bent portion. The above-mentioned sliding groove forms a port at the end of the above-mentioned bent portion facing away from the above-mentioned first fixing portion, and the above-mentioned counterweight can enter the above-mentioned sliding groove from the above-mentioned port.

[0021] Advantages of the present invention:

[0022] The present application provides a compressor, which includes an end cover, a compression assembly, and a valve plate assembly. Among them, the end cover is provided with an exhaust port; the air outlet of the compression assembly is communicated with the exhaust port; the valve plate assembly is installed on the side of the end cover facing away from the compression assembly. The valve plate assembly includes an exhaust valve plate, a baffle plate, and a counterweight. The baffle plate includes a first fixing portion and a bent portion fixedly connected thereto. The first fixing portion is fixed to the end cover, and the bent portion is located on one axial side of the exhaust port and bends axially away from the end cover; the counterweight is installed on the side of the bent portion facing away from the exhaust port; the exhaust valve plate includes a second fixing portion and a swinging portion connected thereto. The second fixing portion is clamped between the first fixing portion and the end cover, and the swinging portion is located between the bent portion and the exhaust port. The swinging portion can elastically deform to open or block the exhaust port.

[0023] Specifically, one ends of the baffle plate and the exhaust valve plate are both fixed to the end cover, and the second fixing portion of the exhaust valve plate is clamped between the baffle plate and the end cover. When in the idle state, the exhaust valve plate abuts against the end face of the exhaust port to close the exhaust port. When the compression assembly operates, the gas inside the compression assembly is discharged out of the end cover through the air outlet of the compression assembly and the exhaust port of the end cover. The gas exerts a force on the swinging portion of the exhaust valve plate, causing the swinging portion of the exhaust valve to tend to move away from the end cover. When the magnitude of the force exceeds the threshold value, the swinging portion elastically deforms, disengages from the abutment with the end face of the exhaust port, and flips towards the bent portion of the baffle plate, and the exhaust port opens. The gas discharged by the compression assembly can be discharged from the exhaust port to the outside of the end cover. The swinging portion always has a tendency to flip towards the side where the exhaust port is located. As the strength of the gas changes, the swinging portion also swings back and forth, repeatedly knocking on the bent portion of the baffle plate. Further, a counterweight is installed on the side of the bent portion facing away from the exhaust port, so that the mass of the bent portion is relatively increased. According to the frequency response function formula, it is obtained that as the mass gradually increases, the response amplitude in the mass increasing area shows a downward trend. In this way, the peak value of the noise volume generated by the baffle plate is adjusted to the low-frequency area. When the compressor operates normally, the baffle plate is located in the high-frequency area, missing the range where the volume peak appears, thereby reducing the volume of the noise generated by the compressor during operation. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0025] Figure 1 is a schematic structural diagram of the compressor provided by the embodiment of the present invention;

[0026] Figure 2 is a modal difference diagram of the end cover provided by the embodiment of the present invention.

[0027] In the figure:

[0028] 10. End cover; 11. Exhaust port; 12. Support boss; 13. Groove;

[0029] 20. Exhaust valve disc; 21. Second fixing part; 22. Swing part;

[0030] 30. Baffle; 31. First fixing part; 32. Bent part;

[0031] 40. Counterweight; 50. Threaded fastener. Detailed implementation manner

[0032] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0033] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0035] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0036] As shown Figure 1 in the figure, the present application provides a compressor, including an end cover 10, a compression assembly, and a valve plate assembly. Among them, the end cover 10 is provided with an exhaust port 11; the air outlet of the compression assembly is communicated with the exhaust port 11; the valve plate assembly is installed on the side of the end cover 10 facing away from the compression assembly. The valve plate assembly includes an exhaust valve plate 20, a baffle 30, and a counterweight 40. The baffle 30 includes a first fixing portion 31 and a bent portion 32 fixedly connected thereto. The first fixing portion 31 is fixed to the end cover 10, and the bent portion 32 is located on one axial side of the exhaust port 11, and the bent portion 32 bends axially away from the end cover 10; the counterweight 40 is installed on the side of the bent portion 32 facing away from the exhaust port 11; the exhaust valve plate 20 includes a second fixing portion 21 and a swinging portion 22 connected thereto. The second fixing portion 21 is clamped between the first fixing portion 31 and the end cover 10, and the swinging portion 22 is located between the bent portion 32 and the exhaust port 11. The swinging portion 22 can elastically deform to open or block the exhaust port 11.

[0037] Specifically, one ends of the baffle 30 and the exhaust valve plate 20 are both fixed to the end cover 10, and the second fixing portion 21 of the exhaust valve plate 20 is clamped between the baffle 30 and the end cover 10. When in an idle state, the exhaust valve plate 20 abuts against the end face of the exhaust port 11 to close the exhaust port 11. When the compression assembly operates, the gas inside the compression assembly has a tendency to be discharged from the air outlet of the compression assembly and the exhaust port 11 of the end cover 10 to the outside of the end cover 10. The gas applies a force to the swinging portion 22 of the exhaust valve plate 20, so that the swinging portion 22 of the exhaust valve has a tendency to move away from the end cover 10. When the magnitude of the force exceeds the threshold value, the swinging portion 22 elastically deforms and disengages from the end face of the exhaust port 11 and flips toward the bent portion 32 of the baffle 30, and the exhaust port 11 is opened. The gas discharged from the compression assembly can be discharged from the exhaust port 11 to the outside of the end cover 10. The swinging portion 22 always has a tendency to flip toward the side where the exhaust port 11 is located. As the strength of the gas changes, the swinging portion 22 also swings back and forth, repeatedly knocking on the bent portion 32 of the baffle 30. Further, a counterweight 40 is installed on the side of the bent portion 32 facing away from the exhaust port 11, so that the mass of the bent portion 32 is relatively increased. According to the frequency response function formula, it is obtained that as the mass gradually increases, the response amplitude in the mass increasing area shows a downward trend. In this way, the peak value of the noise volume generated by the baffle 30 is adjusted to the low-frequency area. When the compressor operates normally, the baffle 30 is located in the high-frequency area, missing the range where the volume peak value appears, thereby reducing the volume of the noise generated by the compressor during operation.

[0038] As Figure 2As shown, in the modal difference diagram of the end cover, after adding the counterweight 40 to the baffle 30, the peak noise frequency band drops from 1800 Hz to the low-frequency band of 800 Hz. After drilling the baffle 30 to reduce its weight, the peak noise frequency band continues to rise to the high-frequency band of 2000 Hz.

[0039] Optionally, a support boss 12 is convexly provided on the circumferential side of the exhaust port 11, and the swing portion 22 of the exhaust valve plate 20 can abut against the support boss 12. With this arrangement, the contact area between the swing portion 22 of the exhaust valve plate 20 and the end face of the exhaust port 11 can be reduced, the processing precision requirements for the exhaust valve plate 20 and the end cover 10 are lowered, and the swing portion 22 of the exhaust valve plate 20 can abut against the support boss 12, thereby sealing the exhaust port 11.

[0040] When the compression assembly stops working, or when the acting force of the gas is lower than the threshold value, the swing portion 22 of the exhaust valve plate 20 recovers its elastic deformation and moves toward the exhaust port 11 side, easily generating impact collisions with the end face of the exhaust port 11, resulting in deformation or damage to the swing portion 22 and / or the end of the exhaust port 11, causing the exhaust valve plate 20 to be unable to seal the exhaust port 11. Based on this, in this embodiment, the support boss 12 is an elastic buffer. The buffer can elastically deform along the axis of the exhaust port 11, thereby providing a buffer for the swing portion 22 of the exhaust valve plate 20 to recover its deformation. And it enables the support boss 12 to further fit with the swing portion 22.

[0041] Optionally, the end cover 10 is provided with a groove 13, the exhaust port 11 is opened at the bottom of the groove 13, and both the baffle 30 and the exhaust valve plate 20 are installed in the groove 13. With this arrangement, the baffle 30 and the exhaust valve plate 20 are protected by the groove 13 to prevent the baffle 30 or the exhaust valve plate 20 from deflecting under the action of external force.

[0042] Optionally, the baffle 30 and the exhaust valve plate 20 are fixed to the end cover 10 by a threaded fastener 50. In this way, it is convenient to disassemble the baffle 30 and / or the exhaust valve plate 20.

[0043] In other embodiments, the baffle 30 and the exhaust valve plate 20 are fixed by rivets.

[0044] Optionally, the central position of the counterweight 40 is the same as the central position of the bent portion 32. In this way, when the bent portion 32 is struck by the swing portion 22 of the exhaust valve plate 20, it can still be placed stably.

[0045] Preferably, the weight ratio of the counterweight 40 to the baffle 30 is 10% to 50%.

[0046] Specifically, when the exhaust valve plate 20 flips under the action of gas and impacts the bent portion 32 of the baffle 30, noise is likely to be generated. Therefore, in this embodiment, a buffer layer is provided on the side of the bent portion 32 facing the exhaust port 11, and the buffer layer can contact the exhaust valve plate 20. In this way, a soft contact is formed between the swing portion 22 of the exhaust valve plate 20 and the bent portion 32 of the baffle 30.

[0047] Optionally, the counterweight 40 is welded to the bent portion 32.

[0048] Optionally, the counterweight 40 and the bent portion 32 are integrally formed by stamping.

[0049] In other embodiments, the baffle 30 is provided with a sliding groove at the bent portion 32. The sliding groove forms a port at the end of the bent portion 32 facing away from the first fixing portion 31, and the counterweight 40 can enter the sliding groove from the port. With this setting, after the baffle 30 is fixed to the end cover 10, the counterweight 40 is installed from the port, which facilitates the replacement of the counterweight 40.

[0050] In addition, the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A compressor, characterized in that, it includes: An end cover (10), the end cover (10) is provided with an exhaust port (11); A compression assembly, the air outlet of the compression assembly is communicated with the exhaust port (11); A valve plate assembly, the valve plate assembly is installed on the side of the end cover (10) facing away from the compression assembly, the valve plate assembly includes an exhaust valve plate (20), a baffle (30) and a counterweight (40), the baffle (30) includes a first fixing portion (31) and a bent portion (32) fixedly connected thereto, the first fixing portion (31) is fixed to the end cover (10), the bent portion (32) is located on one axial side of the exhaust port (11), and the bent portion (32) bends away from the end cover (10) along the axial direction; the counterweight (40) is installed on the side of the bent portion (32) facing away from the exhaust port (11); the exhaust valve plate (20) includes a second fixing portion (21) and a swinging portion (22) connected thereto, the second fixing portion (21) is clamped between the first fixing portion (31) and the end cover (10), and the swinging portion (22) is located between the bent portion (32) and the exhaust port (11), and the swinging portion (22) can elastically deform to open or block the exhaust port (11).

2. The compressor according to claim 1, characterized in that, A support boss (12) protrudes from the circumferential side of the exhaust port (11), and the swinging portion (22) can abut against the support boss (12).

3. The compressor according to claim 2, characterized in that, The support boss (12) is an elastic buffer.

4. The compressor according to claim 1, characterized in that, The end cover (10) is provided with a groove (13), the exhaust port (11) is opened at the bottom of the groove (13), and both the baffle (30) and the exhaust valve plate (20) are installed in the groove (13).

5. The compressor according to claim 1, characterized in that, The central position of the counterweight (40) is consistent with the central position of the bent portion (32).

6. The compressor according to claim 1, characterized in that, The weight ratio of the counterweight (40) to the baffle (30) is 10% to 50%.

7. The compressor according to claim 1, characterized in that, A buffer layer is provided on the side of the bent portion (32) facing the exhaust port (11), and the buffer layer can contact the exhaust valve plate (20).

8. The compressor according to claim 1, characterized in that, The counterweight (40) is welded to the bent portion (32).

9. The compressor according to claim 1, characterized in that, The counterweight (40) and the bent portion (32) are integrally formed by stamping.

10. The compressor according to claim 1, characterized in that, The baffle (30) is provided with a chute at the bending portion (32). The chute forms a port at one end of the bending portion (32) facing away from the first fixing portion (31). The counterweight (40) can enter the chute from the port.

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