A scroll compressor with a noise reduction stop valve

Abstract

The utility model discloses a scroll compressor with a noise reduction stop valve, including a shell, a transmission shaft, an air intake chamber and an air discharge chamber, and also includes: a compression part, the compression part has an exhaust port for discharging high-pressure gas, and the exhaust port is connected to the exhaust chamber through a valve body; a muffler cover, the muffler cover is arranged above the compression part and has an exhaust hole connected to the exhaust port; a valve body, the valve body is connected to the muffler cover, and the valve body has a stop valve plate that moves up and down and limits the backflow of high-pressure gas. The utility model makes the stop valve plate move up and down through the flow direction of high-pressure gas, limits the backflow of high-pressure gas, and makes the compressor have an anti-reversal function. The hole opened on the valve plate makes the pressure of the exhaust chamber and the air intake chamber quickly balanced after the compressor stops, thereby improving the starting ability of the compressor. In addition, the stop valve plate is arranged between the valve cover and the valve seat, and a muffler hole is opened on the valve body, which has a muffler effect while intercepting the flow, and can achieve airflow cutoff and noise reduction in a compact space.

Description

Technical Field

[0001] The utility model belongs to the technical field of scroll compressors, and in particular relates to a scroll compressor with a noise reduction stop valve. Background Art

[0002] The scroll compressor is a positive displacement compressor, whose core compression components are composed of a moving scroll and a stationary scroll. It mainly relies on the relative revolution of the moving and stationary scrolls, which will form a continuous change of the closed volume between the two, thereby achieving the purpose of compressing the gas.

[0003] When the scroll compressor stops, part of the high-pressure gas will flow back, causing the compressor to reverse, which will damage the components inside the compressor and bring a bad experience to the user. The existing technology usually sets an HV valve in the compressor to eliminate the reverse problem, but the resistance of the HV valve is large, which will reduce the energy efficiency of the compressor. In addition, for compressors with smaller cooling capacity, due to the limitation of internal space, the above-mentioned anti-reverse mechanism cannot be used.

[0004] Therefore, a compressor with a simple and compact structure and good anti-reversal effect is needed. Utility Model Content

[0005] In order to solve the above technical problems, the utility model discloses a scroll compressor with a noise reduction stop valve, in which the stop valve plate moves up and down according to the flow direction of the high-pressure gas, thereby limiting the flow and reflux flow of the high-pressure gas, so that the compressor has an anti-reversal function, and the small hole opened on the valve plate allows the pressure of the high-pressure exhaust chamber and the low-pressure suction chamber to be quickly balanced after the compressor is shut down, so that the compressor can be started quickly and the requirements for the starting ability of the motor are reduced, and a silencer hole is opened on the valve body, which has a silencing effect while cutting off the flow. The noise reduction stop valve has a simple structure and can achieve airflow cutoff and noise reduction in a compact space.

[0006] Specifically, the utility model discloses a scroll compressor with a noise reduction stop valve, comprising a housing, a transmission shaft, an air suction chamber and an air discharge chamber, and further comprising:

[0007] A compression part, the compression part having an exhaust port for exhausting high-pressure gas, the exhaust port being connected to the exhaust chamber through the valve body;

[0008] A silencer cover, which is disposed above the compression part and has an exhaust hole connected to the exhaust port;

[0009] The valve body is connected with the silencer cover and is provided with a stop valve plate which moves up and down and limits the backflow of high-pressure gas.

[0010] The utility model utilizes the flow direction of high-pressure gas to make the stop valve plate move up and down, thereby limiting the flow and reflux flow of high-pressure gas, so that the compressor has an anti-reversal function. The small hole opened on the valve plate balances the pressure of the high-pressure exhaust chamber and the low-pressure suction chamber after the compressor stops, thereby improving the starting ability of the compressor. In addition, the stop valve plate is arranged between the valve cover and the valve seat, and a silencer hole is opened on the valve body, which has a silencing effect while cutting off the flow, and can achieve airflow cutoff and noise reduction in a compact space.

[0011] Furthermore, the valve body includes a valve cover and a valve seat, the valve cover and the valve seat are sealingly connected, the valve cover is provided with a silencer hole, and the valve seat has a valve hole connected to the exhaust hole.

[0012] Furthermore, the valve seat is interference-connected with the silencer cover, and a first groove is provided on the valve seat to allow the stop valve plate to move up and down.

[0013] By adopting the above solution, the interference connection between the valve seat and the silencer cover improves the sealing performance between the valve body and the silencer cover, and the stop valve plate moves up and down in the first groove to limit the circulation of high-pressure gas.

[0014] Furthermore, the valve cover is an inverted U-shaped structure, and the bottom of the valve cover has a slot matching the valve seat, and the inner diameter of the slot is smaller than the diameter of the first groove.

[0015] By adopting the above solution, the valve cover limits the upward movement of the stop valve plate, so that the stop valve plate moves between the valve cover and the valve seat.

[0016] Furthermore, the diameter of the stop valve plate matches the inner diameter of the first groove, and the stop valve plate is provided with a reflux hole, which is arranged at the center of the stop valve plate.

[0017] By adopting the above scheme, the high-pressure gas in the high-pressure exhaust chamber enters the compression part through the reflux hole of the stop valve plate, causing the orbiting scroll and the fixed scroll to disengage, and then enters the suction chamber, thereby balancing the pressure of the exhaust chamber and the suction chamber.

[0018] Furthermore, a ventilation groove is provided on the stop valve plate, the ventilation groove is in a fan ring shape, and the inner diameter of the ventilation groove is larger than the diameter of the valve hole.

[0019] By adopting the above scheme, the provision of the ventilation groove facilitates the discharge of compressed high-pressure gas. When the compressor is running, the high-pressure gas pushes the stop valve plate to move upward, and the stop valve plate is limited by the slot designed on the valve cover. The high-pressure gas is exhausted to the exhaust chamber through the ventilation groove of the stop valve plate; when the compressor stops running, the stop valve plate moves downward under the action of the reflux gas, close to the valve seat, and cuts off the high-pressure gas. The high-pressure gas refluxes in the reflux hole, quickly balancing the pressure between the exhaust chamber and the suction chamber.

[0020] Furthermore, a second groove is formed at the bottom of the first groove, and a step surface formed between the second groove and the first groove is a thrust surface, and a major diameter of the thrust surface is greater than an inner diameter of the vent groove.

[0021] By adopting the above solution, high-pressure gas flows back, making the valve plate close to the thrust surface, and the second groove gives the high-pressure gas flow an upward recoil, and the recoil force will not affect the stop valve plate, so the setting of the second groove and the thrust surface improves the stability of the stop valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0023] Figure 1 is a cross-sectional view of a scroll compressor having a noise reduction stop valve;

[0024] Figure 2 It is an axial sectional view of the valve body;

[0025] Figure 3 This is a schematic diagram of the stop valve plate of the compressor in working state;

[0026] Figure 4 This is a schematic diagram of the stop valve plate when the compressor is closed;

[0027] Figure 5 It is a top view of the stop valve.

[0028] The numbers involved in the drawings are as follows: shell 1, transmission shaft 2, suction chamber 3, exhaust chamber 4, compression part 5, silencer cover 6, valve body 7, valve seat 71, valve hole 711, first groove 712, second groove 713, thrust surface 714, valve cover 72, silencer hole 721, slot 722, stop valve plate 73, reflux hole 731, ventilation groove 732. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1-5 As shown, the utility model discloses a scroll compressor with a noise reduction stop valve, comprising a housing 1, a transmission shaft 2, an air suction chamber 3 and an air discharge chamber 4, and further comprising:

[0031] A compression part 5, the compression part 5 has an exhaust port for exhausting high-pressure gas, and the exhaust port is connected to the exhaust chamber 4 through a valve body 7;

[0032] A silencer cover 6, which is disposed above the compression portion 5 and has an exhaust hole connected to the exhaust port;

[0033] The valve body 7 is connected to the silencer cover 6 and has a stop valve plate 73 which moves up and down to limit the backflow of high-pressure gas.

[0034] The flow direction of the high-pressure gas causes the shut-off valve plate 73 to move up and down, limiting the flow and reflux flow of the high-pressure gas, balancing the pressure of the high-pressure exhaust chamber 4 and the low-pressure suction chamber 3, and improving the starting speed of the compressor. In addition, the shut-off valve plate 73 is arranged inside the valve cover 7, and a silencer hole 721 is opened on the valve body 7, which has a silencing effect while intercepting the flow, and can achieve airflow cutoff and noise reduction in a compact space.

[0035] When the compressor is running, the high-pressure gas compressed by the compression part 5 is discharged from the exhaust port, pushing the stop valve plate 73 to move upward, and the high-pressure gas enters the exhaust chamber through the stop valve plate 73; when the compressor stops running, under the action of the reflux gas, the stop valve plate 73 moves downward, close to the valve seat 71, cutting off the high-pressure gas, and a small amount of high-pressure gas passes through the stop valve plate 73 to quickly balance the pressure of the exhaust chamber 4 and the suction chamber 3.

[0036] In some embodiments of the utility model, the valve body 7 includes a valve cover 72 and a valve seat 71, the valve cover 72 is sealed and connected to the valve seat 71, the valve cover 72 is provided with a silencer hole 721, the valve seat 71 has a valve hole 711 connected to the exhaust hole, and the high-pressure gas generated by the compression part 5 enters the exhaust chamber 4 through the silencer cover 6, the valve hole 711, and the valve body 7. Among them, the valve seat 71 is interference-connected with the exhaust hole of the silencer cover 6, and the valve seat 71 is provided with a first groove 712 that allows the stop valve plate 73 to move up and down. The stop valve plate 73 moves up and down in the first groove 712 under the action of the high-pressure gas.

[0037] In some embodiments of the utility model, the longitudinal cross-section of the valve cover 72 is an inverted U-shaped structure, and the bottom of the valve cover 72 has a slot 722 that matches the valve seat 71. The longitudinal cross-section of the slot 722 is an inverted T-shaped structure, which is connected to the silencer hole 721, and the inner diameter of the slot 722 is smaller than the diameter of the first groove 712. The valve cover 72 limits the upward movement of the stop valve plate 73, so that the stop valve plate 73 moves between the valve cover 72 and the valve seat 71.

[0038] In order to allow the high-pressure gas to flow in the valve body 7, the diameter of the stop valve plate 73 is matched with the inner diameter of the first groove 712, and a reflux hole 731 is opened on the stop valve plate 73. The reflux hole 731 is arranged at the center of the stop valve plate 73, so that the high-pressure gas in the high-pressure exhaust chamber 4 enters the compression part 5 through the reflux hole 731, disengages the movable scroll and the fixed scroll, and then enters the suction chamber 3, thereby balancing the pressure of the exhaust chamber 4 and the suction chamber 3.

[0039] In addition, a venting groove 732 is provided on the stop valve plate 73. The venting groove 732 is fan-shaped, and the inner diameter of the venting groove 732 is larger than the diameter of the valve hole 711. The setting of the venting groove 732 facilitates the discharge of compressed high-pressure gas. When the compressor is running, the high-pressure gas pushes the stop valve plate 73 to move upward. The stop valve plate 73 is limited by the slot 722 designed on the valve cover 72, and the high-pressure gas enters the exhaust chamber 4 through the venting groove 732 of the stop valve plate 73; when the compressor stops running, the stop valve plate 73 moves downward under the action of the reflux gas, close to the valve seat 71, and cuts off the high-pressure gas. A small amount of high-pressure gas flows back through the reflux hole 731, quickly balancing the pressure of the exhaust chamber 4 and the suction chamber 3.

[0040] In some embodiments of the utility model, a second groove 713 is provided at the bottom of the first groove 712, the second groove 713 is an annular groove, and the inner diameter of the second groove 713 is larger than the aperture of the valve hole 711, therefore, a step surface is formed between the second groove 713 and the first groove 712, the step surface is a thrust surface 714, and the major diameter of the thrust surface 714 is larger than the inner diameter of the vent groove 732. The high-pressure gas flows back, so that the valve plate is close to the thrust surface 714, and the second groove 713 gives the high-pressure gas an upward recoil, and the recoil force will not affect the stop valve plate 73, so the second groove 713 and the thrust surface 714 are set to improve the stability of the stop valve plate 73.

[0041] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A scroll compressor with a noise reduction stop valve, comprising a housing (1), a transmission shaft (2), an air intake chamber (3) and an air discharge chamber (4), characterized in that: Also includes: A compression part (5), the compression part (5) having an exhaust port for exhausting high-pressure gas, the exhaust port being connected to the exhaust chamber (4) through a valve body (7); A silencer cover (6), the silencer cover (6) being arranged above the compression part (5) and having an exhaust hole communicating with the exhaust port; A valve body (7) is connected to the silencer cover (6), and the valve body (7) has a stop valve plate (73) which moves up and down and limits the backflow of high-pressure gas.

2. The scroll compressor with a noise reduction stop valve according to claim 1, characterized in that: The valve body (7) comprises a valve cover (72) and a valve seat (71); the valve cover (72) and the valve seat (71) are sealed and connected; a silencer hole (721) is provided on the valve cover (72); and the valve seat (71) has a valve hole (711) connected to the exhaust hole.

3. The scroll compressor with a noise reduction stop valve according to claim 2, characterized in that: The valve seat (71) is interference-connected with the silencer cover (6), and a first groove (712) is provided on the valve seat (71) to allow the stop valve plate (73) to move up and down.

4. The scroll compressor with a noise reduction stop valve according to claim 3, characterized in that: The valve cover (72) is an inverted U-shaped structure, and the bottom of the valve cover (72) has a slot (722) matching the valve seat (71), and the inner diameter of the slot (722) is smaller than the diameter of the first groove (712).

5. The scroll compressor with a noise reduction stop valve according to claim 3, characterized in that: The diameter of the stop valve plate (73) matches the inner diameter of the first groove (712), and the stop valve plate (73) is provided with a reflux hole (731), and the reflux hole (731) is arranged at the center of the stop valve plate (73).

6. The scroll compressor with a noise reduction stop valve according to claim 3, characterized in that: The stop valve plate (73) is provided with a ventilation groove (732), the ventilation groove (732) is in a fan ring shape, and the inner diameter of the ventilation groove (732) is greater than the diameter of the valve hole (711).

7. The scroll compressor with a noise reduction stop valve according to claim 6, characterized in that: A second groove (713) is provided at the bottom of the first groove (712); a step surface formed between the second groove (713) and the first groove (712) is a thrust surface (714); and a major diameter of the thrust surface (714) is greater than an inner diameter of the vent groove (732).

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