Noise reduction stop valve of scroll compressor and scroll compressor

Abstract

The scroll compressor noise reduction stop valve comprises a valve body, the upper portion of the valve body is communicated with an exhaust cavity, the lower portion of the valve body is connected with a noise reduction cover and a compression part, and the exhaust cavity is communicated with the compression part through the valve body; wherein the compression part is provided with an exhaust port used for exhausting high-pressure gas, and the silencing cover is provided with an exhaust hole communicated with the exhaust port; a stop valve block which moves up and down and limits backflow of high-pressure gas is arranged in the valve body. The stop valve plate moves up and down in the flowing direction of high-pressure gas, backflow of the high-pressure gas is limited, the compressor has an anti-reverse-rotation function, the pressure of the high-pressure exhaust cavity and the pressure of the low-pressure suction cavity are balanced through the small holes formed in the valve plate, and the starting capacity of the compressor is improved. In addition, the stop valve plate is arranged between the valve cover and the valve seat, the noise reduction holes are formed in the valve body, the noise reduction effect is achieved while flow stopping is achieved, and airflow stopping and noise reduction can be achieved in a compact space.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of scroll compressors, and particularly relates to a noise-reducing stop valve of a scroll compressor and a scroll compressor. BACKGROUND

[0002] A scroll compressor is a volumetric compression compressor, and its core compression component is composed of a dynamic scroll plate and a static scroll. The relative revolution of the dynamic scroll plate and the static scroll mainly depends on the relative revolution of the dynamic scroll plate and the static scroll. This form of movement will form a continuously changing closed volume between the two, thereby achieving the purpose of compressing gas.

[0003] When the scroll compressor is stopped, part of the high-pressure gas will flow back, thereby causing the compressor to reverse, damaging the internal components of the compressor, and also causing poor user experience. The prior art usually sets an HV valve in the compressor to eliminate the reverse problem, but the HV valve has large resistance, which reduces the energy efficiency of the compressor. In addition, for a compressor with small refrigeration capacity, the internal space is limited, and the above-mentioned anti-reverse mechanism cannot be used.

[0004] Therefore, there is a need for a compressor with a simple and compact structure and good anti-reverse effect. SUMMARY

[0005] To solve the above technical problems, the present application discloses a noise-reducing stop valve of a scroll compressor and a scroll compressor. The flow direction of the high-pressure gas makes the stop valve plate move up and down, limits the backflow of the high-pressure gas, and makes the compressor have an anti-reverse function. The small holes in the valve plate balance the pressure of the high-pressure exhaust cavity and the low-pressure suction cavity, reduce the requirement for the starting capacity of the motor, and improve the starting capacity of the compressor. In addition, the stop valve plate is arranged between the valve cover and the valve seat, and the valve body is provided with a sound attenuation hole. The stop valve has the effects of stopping and attenuating sound in a compact space. The noise-reducing stop valve has a simple structure and can stop and attenuate the airflow in a compact space.

[0006] Specifically, the present application discloses a noise-reducing stop valve of a scroll compressor, comprising:

[0007] A valve body, an exhaust cavity is communicated above the valve body, a sound attenuation cover and a compression part are connected below the valve body, and the exhaust cavity and the compression part are communicated through the valve body; wherein,

[0008] The compression part has an exhaust port for discharging high-pressure gas, and the sound attenuation cover has an exhaust hole communicated with the exhaust port;

[0009] The valve body has a stop valve plate for moving up and down and limiting the backflow of high-pressure gas;

[0010] When the scroll compressor works, the high-pressure gas generated by the compression part enters the exhaust cavity through the stop valve piece; when the scroll compressor is closed, the stop valve piece limits the backflow of the high-pressure gas in the exhaust cavity.

[0011] The stop valve piece moves up and down by using the flow direction of the high-pressure gas, the flow and backflow of the high-pressure gas are limited, the pressure of the high-pressure exhaust cavity and the low-pressure suction cavity is balanced, the starting speed of the compressor is improved, in addition, the stop valve piece is arranged between the valve cover and the valve seat, the valve body is provided with a sound hole, the stop valve piece has the effect of sound reduction while stopping, and the stop of the gas flow and the noise reduction can be realized in a compact space.

[0012] Further, the valve body comprises a valve cover and a valve seat, the valve cover and the valve seat are sealingly connected, the valve cover is provided with a sound hole, and the valve seat is provided with a valve hole communicating with the exhaust hole.

[0013] Further, the valve seat and the sound cover are interference connected, and the valve seat is provided with a first groove allowing the stop valve piece to move up and down.

[0014] By adopting the above scheme, the interference connection of the valve seat and the sound cover improves the sealing performance between the valve body and the sound cover, and the stop valve piece moves up and down in the first groove to limit the flow of the high-pressure gas.

[0015] Further, the valve cover is in inverted U-shaped structure, the bottom of the valve cover is provided with a plug-in slot matched with the valve seat, and the inner diameter of the plug-in slot is smaller than the diameter of the first groove.

[0016] By adopting the above scheme, the valve cover limits the upward movement of the stop valve piece, so that the stop valve piece moves between the valve cover and the valve seat.

[0017] Further, the diameter of the stop valve piece matches the inner diameter of the first groove, and the stop valve piece is provided with a backflow hole, and the backflow hole is arranged at the center of the stop valve piece.

[0018] By adopting the above scheme, the high-pressure gas in the high-pressure exhaust cavity enters the compression part through the backflow hole of the stop valve piece, so that the orbiting scroll plate and the fixed scroll plate are disengaged, and then enter the suction cavity, so as to balance the pressure of the high-pressure exhaust cavity and the low-pressure suction cavity.

[0019] Further, the stop valve piece is provided with an air passage groove, the air passage groove is in fan ring shape, and the inner diameter of the air passage groove is greater than the diameter of the valve hole.

[0020] By adopting the above scheme, the vent groove is arranged to facilitate the discharge of the compressed high-pressure gas. When the compressor is running, the high-pressure gas pushes the stop valve disc to move upward, the stop valve disc is limited by the insertion slot designed on the valve cover, and the high-pressure gas is discharged to the exhaust cavity through the vent groove of the stop valve disc. When the compressor stops running, the stop valve disc moves downward under the action of the backflow gas, tightly abuts against the valve seat, and cuts off the high-pressure gas, so that the high-pressure gas backflows and quickly balances the pressure between the exhaust cavity and the suction cavity.

[0021] Further, the bottom of the first groove is provided with a second groove, and a step surface formed between the first groove and the second groove is a thrust surface, and the large diameter of the thrust surface is greater than the inner diameter of the vent groove.

[0022] By adopting the above scheme, the high-pressure gas backflows, so that the valve disc tightly abuts against the thrust surface, and the second groove provides the upward recoil of the high-pressure gas flow, and the recoil force does not affect the stop valve disc, so that the second groove and the thrust surface improve the stability of the stop valve disc.

[0023] On the other hand, the application also discloses a scroll compressor comprising the noise reduction stop valve. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below.

[0025] Figure 1 is the axial side view of the valve body;

[0026] Figure 2 is the schematic diagram of the stop valve disc in the working state of the compressor;

[0027] Figure 3 is the schematic diagram of the stop valve disc in the closed state of the compressor;

[0028] Figure 4 is the top view of the stop valve disc;

[0029] Figure 5 is the sectional view of the scroll compressor.

[0030] The reference signs involved in the drawings are as follows: valve body 1, valve seat 11, valve hole 111, first groove 112, second groove 113, thrust surface 114, valve cover 12, sound attenuation hole 121, insertion slot 122, stop valve disc 13, backflow hole 131, vent groove 132, exhaust cavity 2, sound attenuation cover 3, compression part 4. DETAILED DESCRIPTION

[0031] The application will be further described in detail below with reference to the drawings.

[0032] AsFigures 1-4 The application discloses a noise reduction stop valve, which comprises:

[0033] A valve body 1 is provided with an exhaust cavity 2 at the upper part and an exhaust cover 3 and a compression part 4 at the lower part, and the exhaust cavity 2 and the compression part 4 are communicated through the valve body 1.

[0034] The compression part 4 is provided with an exhaust port for discharging high-pressure gas, and the exhaust cover 3 is provided with an exhaust hole communicated with the exhaust port.

[0035] The valve body 1 is provided with a stop valve piece 13 moving up and down and limiting the backflow of high-pressure gas.

[0036] When the scroll compressor is working, the high-pressure gas generated by the compression part 4 enters the exhaust cavity 2 through the stop valve piece 13, and when the scroll compressor is turned off, the stop valve piece 13 limits the backflow of the high-pressure gas in the exhaust cavity 2.

[0037] The flow direction of the high-pressure gas makes the stop valve piece 13 move up and down, limits the flow and backflow of the high-pressure gas, balances the pressure of the high-pressure exhaust cavity 2 and the low-pressure suction cavity, improves the starting speed of the compressor, and in addition, the stop valve piece 13 is arranged in the valve body 1, the valve body 1 is provided with a sound reduction hole 121, and the stop valve piece 13 has the effect of sound reduction while stopping the flow, so that the stop and noise reduction of the gas flow can be realized in a compact space.

[0038] Therefore, when the compressor is working, the high-pressure gas compressed by the compression part 4 is discharged from the exhaust port, pushes the stop valve piece 13 to move upwards, and the high-pressure gas enters the exhaust cavity 2 through the stop valve piece 13; when the compressor stops working, the stop valve piece 13 moves downwards under the action of the backflow gas, tightly abuts against the valve seat 11, cuts off the high-pressure gas, and a small amount of high-pressure gas passes through the stop valve piece 13, rapidly balances the pressure of the exhaust cavity 2 and the suction cavity.

[0039] In some embodiments of the application, the valve body 1 comprises a valve cover 12 and a valve seat 11, the valve cover 12 is sealingly connected with the valve seat 11, the valve cover 12 is provided with a sound reduction hole 121, the valve seat 11 is provided with a valve hole 111 communicated with the exhaust hole, the high-pressure gas generated by the compression part 4 enters the exhaust cavity 2 through the exhaust cover 3, the valve hole 111 and the valve body 1. The valve seat 11 is interference-connected with the exhaust cover 3, and the valve seat 11 is provided with a first recess 112 allowing the stop valve piece 13 to move up and down. The stop valve piece 13 moves up and down in the first recess 112 under the action of the high-pressure gas.

[0040] In some embodiments of the present application, the valve cover 12 has an inverted U-shaped longitudinal section, the bottom of the valve cover 12 has a matching slot 122 with the valve seat 11, the longitudinal section of the slot 122 is in an inverted T shape, the slot 122 is in communication with the sound hole 121, and the inner diameter of the slot 122 is smaller than the diameter of the first groove 112, the valve cover 12 limits the upward movement of the stop valve disc 13, and the stop valve disc 13 moves between the valve cover 12 and the valve seat 11.

[0041] In order to make the high-pressure gas flow in the valve body 1, the diameter of the stop valve disc 13 is matched with the inner diameter of the first groove 112, and the stop valve disc 13 is provided with a backflow hole 131, which is arranged at the center of the stop valve disc 13, so that the high-pressure gas in the high-pressure exhaust cavity 2 enters the compression part 4 through the backflow hole 131, the moving scroll and the stationary scroll are disengaged, and then enters the suction cavity, thereby balancing the pressure of the exhaust cavity 2 and the suction cavity.

[0042] In addition, the stop valve disc 13 is also provided with an air passage 132, which is in a fan ring shape, and the inner diameter of the air passage 132 is greater than the diameter of the valve hole 111. The air passage 132 is arranged to facilitate the discharge of the compressed high-pressure gas. When the compressor is running, the high-pressure gas pushes the stop valve disc 13 to move upward, the stop valve disc 13 is limited by the slot 122 designed on the valve cover 12, and the high-pressure gas enters the exhaust cavity 2 through the air passage 132 of the stop valve disc 13; when the compressor stops running, the stop valve disc 13 moves downward under the action of the backflow gas, tightly abuts against the valve seat 11, and cuts off the high-pressure gas, a small amount of high-pressure gas backflows through the backflow hole 131, and the pressure of the exhaust cavity 2 and the suction cavity is quickly balanced.

[0043] In some embodiments of the present application, the bottom of the first groove 112 is provided with a second groove 113, the second groove 113 is an annular groove, and the inner diameter of the second groove 113 is greater than the diameter of the valve hole 111. Therefore, a step surface is formed between the second groove 113 and the first groove 112, the step surface is a thrust surface 114, and the diameter of the thrust surface 114 is greater than the inner diameter of the air passage 132. The backflow of the high-pressure gas makes the valve disc tightly abut against the thrust surface 114, and the second groove 113 provides an upward recoil to the high-pressure gas flow, and the recoil force does not affect the stop valve disc 13, so that the second groove 113 and the thrust surface 114 improve the stability of the stop valve disc 13.

[0044] In addition, the present application also discloses a scroll compressor comprising the noise-reducing stop valve disclosed in any of the above embodiments.

[0045] For those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A scroll compressor noise reduction stop valve, characterized in that: include: A valve body (1), wherein the upper portion of the valve body (1) is connected to an exhaust chamber (2), and the lower portion is connected to a silencer cover (3) and a compression portion (4), wherein the exhaust chamber (2) and the compression portion (4) are connected through the valve body (1); wherein, The compression part (4) has an exhaust port for discharging high-pressure gas, and the muffler cover (3) has an exhaust hole connected to the exhaust port; The valve body (1) is provided with a stop valve plate (13) that moves up and down and limits the backflow of high-pressure gas; When the scroll compressor is operating, the high-pressure gas generated by the compression part (4) enters the exhaust chamber (2) through the stop valve plate (13); when the scroll compressor is shut down, the stop valve plate (13) restricts the backflow of the high-pressure gas in the exhaust chamber (2).

2. The scroll compressor noise reduction stop valve according to claim 1, characterized in that: The valve body (1) comprises a valve cover (12) and a valve seat (11), wherein the valve cover (12) and the valve seat (11) are sealed and connected, a silencer hole (121) is provided on the valve cover (12), and the valve seat (11) has a valve hole (111) connected to the exhaust hole.

3. The scroll compressor noise reduction stop valve according to claim 2, characterized in that: The valve seat (11) is interference-connected with the silencer cover (3), and a first groove (112) is provided on the valve seat (11) to allow the shut-off valve plate (13) to move up and down.

4. The scroll compressor noise reduction stop valve according to claim 3, characterized in that: The valve cover (12) is an inverted U-shaped structure. The bottom of the valve cover (12) has a slot (122) that matches the valve seat (11), and the inner diameter of the slot (122) is smaller than the diameter of the first groove (112).

5. The scroll compressor noise reduction stop valve according to claim 3, characterized in that: The diameter of the stop valve disc (13) matches the inner diameter of the first groove (112), and the stop valve disc (13) is provided with a reflux hole (131), which is located at the center of the stop valve disc (13).

6. The scroll compressor noise reduction stop valve according to claim 3, characterized in that: A vent groove (132) is provided on the stop valve plate (13), the vent groove (132) is in a fan ring shape, and the inner diameter of the vent groove (132) is larger than the diameter of the valve hole (111).

7. The scroll compressor noise reduction stop valve according to claim 6, characterized in that: A second groove (113) is provided at the bottom of the first groove (112); a step surface formed between the second groove (113) and the first groove (112) is a thrust surface (114); and the major diameter of the thrust surface (114) is greater than the inner diameter of the vent groove (132).

8. A scroll compressor, characterized in that: The invention comprises the scroll compressor noise reduction stop valve according to any one of claims 1 to 7.

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