Built-in one-way valve structure of compressor

Abstract

The utility model discloses a built-in one-way valve structure of a compressor, which is arranged in an air outlet of the compressor and comprises a sealing valve seat and a sealing valve plate. The air outlet faces upwards when being observed in the height direction of the compressor; the sealing valve seat is connected in the air outlet in a positioning mode, the appearance of the sealing valve seat is matched with the appearance of the air outlet, the sealing valve plate can be matched with the air outlet, air can be exhausted or blocked quickly, and particularly, when the sealing valve is used in a shutdown mode, the sealing valve seat can be used for sealing the air outlet. The sealing valve plate arranged in the air outlet can be pressed on the upper surface of the sealing valve seat through self weight to block the exhaust port, and once the air is exhausted from the air outlet, the air entering the air outlet can push up the sealing valve plate to enable the sealing valve plate to suspend right above the exhaust port. And the sealing valve plate is pressed on the upper surface of the sealing valve seat again through self weight.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a compressor built-in one-way valve structure. Background Technology

[0002] Screw compressors rely on the meshing rotation of male and female rotors to compress gas and are widely used in industrial refrigeration, pneumatic systems, and other fields. At the moment the unit stops, the pressure difference between the high-pressure and low-pressure sides of the compressor can cause gas backflow (especially in naturally cooled units that rely on internal pressure for cooling), pushing the rotor to rotate in the opposite direction (reverse rotation). Reverse rotation can lead to abnormal bearing wear, lubrication circuit disruption, and even rotor collision or shaft displacement. To address this issue, most existing technologies install a check valve on the compressor outlet pipe to prevent gas backflow during shutdown.

[0003] However, the above methods have limitations when used, as follows:

[0004] Traditional check valves achieve one-way sealing by blocking the passage with the valve core. For example, inline spring check valves use a spring to push the valve core to block the passage. During long-term use, the sealing surface of the check valve may wear (especially the edges of the sealing surface) or impurities may jam the spring, resulting in a small leak at the sealing point. Since natural cooling units rely on internal pressure to maintain cooling function, leakage will disrupt the pressure balance and reduce cooling efficiency.

[0005] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0006] This invention provides a compressor-embedded one-way valve structure, which aims to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a compressor built-in one-way valve structure, which is installed in the air outlet of the compressor, and the one-way valve structure includes a sealing valve seat and a sealing valve plate;

[0008] Viewed along the height of the compressor, the air outlet is positioned upwards;

[0009] The sealing valve seat is positioned and connected inside the air outlet. The shape of the sealing valve seat matches the shape of the air outlet. The sealing valve seat is provided with an exhaust port, which is set along the height direction of the sealing valve seat. When the sealing valve seat is positioned inside the air outlet, the gas entering the air outlet is configured to be discharged only through the exhaust port.

[0010] The sealing valve plate and the sealing valve seat are arranged in sequence along a direction from top to bottom, the sealing valve plate is arranged above the exhaust port, and an area of the sealing valve plate is greater than an area of the exhaust port;

[0011] The sealing valve plate has a reset state and a lifted state;

[0012] In the reset state, the sealing valve plate is pressed on the upper surface of the sealing valve seat by gravity to block the exhaust port;

[0013] In the lifted state, the gas entering the exhaust port pushes up the sealing valve plate to make the sealing valve plate away from and open the exhaust port.

[0014] In the above scheme, the relevant content is explained as follows:

[0015] In the above scheme, the exhaust port needs to be arranged upward, that is, the exhaust port axis is perpendicular to the ground or forms a set angle with the ground, only in this way the sealing valve plate can be pressed on the upper surface of the sealing valve seat by gravity.

[0016] In the above scheme, the area of the sealing valve plate needs to be greater than the area of the exhaust port to achieve the blocking purpose, if it is equal to or less than, there will be a sealing gap.

[0017] In the above scheme, the change between the reset state and the lifted state of the sealing valve plate can be realized by the suspension rope arranged in the exhaust port, or by the rotationally connected sealing valve plate, as long as the sealing valve plate can move up and down directly above the exhaust port.

[0018] The exhaust port axis can coincide with the exhaust port axis, or they can form a set angle, for example, the exhaust port axis is arranged obliquely. Preferably, they coincide.

[0019] In the above scheme, after the sealing valve plate is pressed on the upper surface of the sealing valve seat, the gas above the sealing valve plate will press the sealing valve plate, so that the blocking effect of the gas meets the sealing requirement.

[0020] In the above scheme, the sealing valve plate and the exhaust port can cooperate to quickly realize the discharge or blocking of the gas. Specifically, when the machine is stopped, the sealing valve plate arranged in the exhaust port is pressed on the upper surface of the sealing valve seat by gravity to block the exhaust port. Once the gas is discharged from the exhaust port, the gas entering the exhaust port will push up the sealing valve plate to make the sealing valve plate hover directly above the exhaust port. When the compressor is stopped, the sealing valve plate will be pressed on the upper surface of the sealing valve seat by gravity again.

[0021] Different from the operation of the external one-way valve in the prior art, the sealing valve plate built in the air outlet is used for sealing operation, wherein the movement of the sealing valve plate is mainly realized by the gas pushing, which will not affect the movement of the sealing valve plate, secondly, the area of the sealing valve plate is larger than the air outlet, which means that the sealing surface is large, and the small wear on the edge of the air outlet will not cause leakage, and different from the pressure of the spring, the sealing valve plate is moved by the gas pressure, which has a small effect on the sealing surface, because the spring has a failure phenomenon, and the present application does not worry about this problem.

[0022] Further technical solutions, the sealing valve seat comprises a valve core disc positioned and connected in the air outlet, the outer surface of the valve core disc is provided with a sealing ring groove, and the first sealing ring is positioned and connected in the sealing ring groove.

[0023] The surface center of the valve core disc is provided with the air outlet, and the axes of the two coincide.

[0024] The upper surface of the valve core disc is positioned and connected with the second sealing ring.

[0025] Although the axes of the air outlet and the valve core disc can have a set angle, the sealing effect of the sealing valve plate is affected, for example, when the air outlet is inclined, the sealing valve plate also needs to be inclined, which causes the sealing valve plate to be unable to be pressed on the upper surface of the valve core disc as a whole, that is, there is a risk of leakage.

[0026] Preferably, the axes of the valve core disc and the air outlet coincide, and the axes of the valve core disc and the sealing valve plate coincide, so that the sealing valve plate can be pressed on the upper surface of the valve core disc as a whole, and the air outlet can be fully sealed.

[0027] And by means of the above design, there will be no gap between the valve core disc and the inner wall of the air outlet, that is, the gas entering the air outlet is only discharged through the air outlet, and the second sealing ring plays a role of further sealing the gap between the sealing valve plate and the upper surface of the valve core disc.

[0028] Further technical solutions, the upper surface of the second sealing ring exceeds the upper surface of the valve core disc.

[0029] By means of the above design, the second sealing ring can fully fill the gap between the sealing valve plate and the upper surface of the valve core disc by deformation.

[0030] Further technical solutions, the upper surface of the valve core disc is provided with a circular groove, the inner side wall of the circular groove is provided with a limiting groove, the second sealing ring is positioned and connected in the limiting groove, and the anti-disengagement pressing plate is positioned and connected in the circular groove, and the inner peripheral side wall of the anti-disengagement pressing plate is attached to the outer peripheral side wall of the second sealing ring; the anti-disengagement pressing plate is in interference fit with the circular groove.

[0031] The anti-falling pressure plate is in interference fit with the circular groove, and the interference fit is hot fit assembly, and the interference amount can be determined according to the material. The height of the anti-falling pressure plate needs to be lower than the groove depth of the circular groove, so as to prevent the sealing valve plate from continuously hitting the anti-falling pressure plate during the operation of the compressor, thereby causing the anti-falling pressure plate to fall off. The inner side of the anti-falling pressure plate has a chamfer for pressing the second sealing ring to prevent the second sealing ring from falling off under stress.

[0032] By means of the above design, the phenomenon that the second sealing ring continuously hits the anti-falling pressure plate during use, causing the anti-falling pressure plate and the second sealing ring to fall off under stress, can be prevented.

[0033] Further technical solutions, from top to bottom, the diameter of the limiting groove is set in an increasing trend.

[0034] By means of the above design, the limiting groove cooperates with the chamfer on the inner side of the anti-falling pressure plate to press the second sealing ring.

[0035] Further technical solutions, the sealing valve plate is rotatably connected to the gas outlet through a rotating valve rod arranged on the inner side wall of the gas outlet.

[0036] By means of the above design, the sealing valve plate will only move in the area directly above the gas outlet no matter how it moves.

[0037] Further technical solutions, the gas outlet includes a positioning groove and an air passage, along the direction from top to bottom, the positioning groove and the air passage are sequentially and coaxially arranged, the sealing valve seat is positioned and connected to the bottom of the positioning groove, the air passage communicates with the positioning groove, and the diameter of the air passage is greater than or equal to the diameter of the gas outlet.

[0038] By means of the above design, the sealing valve seat can be quickly positioned, and has high stability.

[0039] As for the "first", "second" and the like used herein, it is not particularly intended to indicate the order or sequence, nor to limit the case, but only to distinguish the components or operations described by the same technical terms.

[0040] As for the "connection" or "positioning" used herein, it can mean that two or more components or devices are in direct physical contact with each other, or are indirectly in physical contact with each other, or can mean that two or more components or devices operate or act on each other.

[0041] As for the "contain", "include", "have" and the like used herein, they are all open terms, that is, they mean containing but not limited to.

[0042] As used herein, the terms have their ordinary meaning in the field of use, unless otherwise indicated specifically herein. Certain terms used to describe the application are discussed below or elsewhere in the specification to provide additional guidance to the skilled worker regarding the description of the application.

[0043] As used herein, the terms "front", "back", "up", "down", "left", "right" and the like refer to directions in the drawings to which they refer, but are not intended to mean specific orientations of the application in actual use.

[0044] The working principle and advantages of the utility model are as follows:

[0045] In the utility model, the sealing valve plate and the exhaust port cooperate to quickly realize the discharge or plugging of gas. Specifically, when the machine is stopped, the sealing valve plate built in the exhaust port is pressed on the upper surface of the sealing valve seat by gravity to plug the exhaust port. Once the gas is discharged from the exhaust port, the gas entering the exhaust port will push up the sealing valve plate to make the sealing valve plate hover above the exhaust port. When the compressor is stopped, the sealing valve plate will be pressed again on the upper surface of the sealing valve seat by gravity.

[0046] Unlike the external one-way valve operation in the prior art, the sealing valve plate built in the exhaust port is used to realize the plugging operation. The movement of the sealing valve plate is mainly realized by the gas, which will not affect the movement of the sealing valve plate. Secondly, the area of the sealing valve plate is larger than that of the exhaust port, which means that the sealing surface is large, and there is no need to worry about the leakage phenomenon caused by the small wear on the edge of the exhaust port. Unlike the pressure of the spring, the sealing valve plate moves by gas pressure, which has little effect on the sealing surface. Because the spring has a failure phenomenon, the application does not need to worry about this problem. BRIEF DESCRIPTION OF DRAWINGS

[0047] ATTACHED Figure 1 It is a top view structure schematic diagram of the sealing valve plate in the embodiment of the utility model;

[0048] ATTACHED Figure 2 It is a top view structure schematic diagram of the sealing valve plate in the embodiment of the utility model; Figure 1 It is a longitudinal section structure schematic diagram of the sealing valve plate in the embodiment of the utility model;

[0049] ATTACHED Figure 3 It is a top view structure schematic diagram of the sealing valve plate in the embodiment of the utility model; Figure 2 It is a local enlarged view of A in the embodiment of the utility model;

[0050] ATTACHED Figure 4 It is a local enlarged view of B in the embodiment of the utility model; Figure 3 It is a local enlarged view of B in the embodiment of the utility model;

[0051] ATTACHED Figure 5 It is a structure schematic diagram of the anti-falling pressure plate in the embodiment of the utility model;

[0052] Appendix Figure 6 This is a schematic diagram of the valve core disc structure in an embodiment of the present utility model;

[0053] Appendix Figure 7 This is a schematic diagram of the structure of the anti-detachment pressure plate fixed on the valve core plate in an embodiment of this utility model.

[0054] In the attached diagrams: 1. Sealing valve seat; 2. Sealing valve plate; 3. Exhaust port; 4. Valve core disc; 5. First sealing ring; 6. Sealing ring groove; 7. Second sealing ring; 8. Circular groove; 9. Limiting groove; 10. Anti-detachment pressure plate; 11. Positioning groove; 12. Vent. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0056] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0057] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0058] See appendix Figures 1-7 As shown, a compressor has a built-in one-way valve structure, which is installed in the air outlet of the compressor. The one-way valve structure includes a sealing valve seat 1 and a sealing valve plate 2.

[0059] Viewed along the height of the compressor, the air outlet is positioned upwards;

[0060] The sealing valve seat 1 is positioned and connected inside the air outlet. The shape of the sealing valve seat 1 matches the shape of the air outlet. The sealing valve seat 1 is provided with an exhaust port 3. The exhaust port 3 is arranged along the height direction of the sealing valve seat 1. When the sealing valve seat 1 is positioned inside the air outlet, the gas entering the air outlet is configured to be discharged only through the exhaust port 3.

[0061] Along the top-to-bottom direction, the sealing valve plate 2 and the sealing valve seat 1 are arranged in sequence, the sealing valve plate 2 is located above the exhaust port 3, and the area of ​​the sealing valve plate 2 is larger than the area of ​​the exhaust port 3;

[0062] The sealing valve plate 2 has a reset state and a raised state;

[0063] In the reset state, the sealing valve plate 2 presses against the upper surface of the sealing valve seat 1 by its own weight to block the exhaust port 3;

[0064] In the lifted state, the gas entering the gas outlet pushes the sealing valve plate 2 up, so that the sealing valve plate 2 is away from and opens the exhaust port 3.

[0065] In this embodiment, the gas outlet needs to be arranged upward, that is, the gas outlet axis is perpendicular to the ground or forms a set angle with the ground, so that the sealing valve plate 2 is pressed on the upper surface of the sealing valve seat 1 by gravity.

[0066] In this embodiment, the area of the sealing valve plate 2 needs to be greater than the area of the exhaust port 3 to achieve the plugging purpose, otherwise, there will be a sealing gap.

[0067] In this embodiment, the change between the reset state and the lifted state of the sealing valve plate 2 can be achieved by the suspension rope arranged in the gas outlet, or the sealing valve plate 2 can be achieved by rotation connection, as long as the sealing valve plate can move up and down above the exhaust port.

[0068] The exhaust port 3 axis can coincide with the gas outlet axis, and the two can also form a set angle, for example, the exhaust port 3 axis is arranged obliquely.

[0069] In this embodiment, after the sealing valve plate 2 is pressed on the upper surface of the sealing valve seat 1, the gas above the sealing valve plate 2 will press the sealing valve plate 2, so that the plugging effect of the gas meets the sealing requirement.

[0070] In the utility model, the sealing valve plate 2 and the exhaust port 3 are matched, the discharge or plugging of the gas is quickly realized, specifically, when stopping, the sealing valve plate 2 arranged in the gas outlet is pressed on the upper surface of the sealing valve seat 1 by gravity to block the exhaust port 3, once the gas outlet discharges the gas, at this time, the gas entering the gas outlet will push the sealing valve plate 2 up, so that the sealing valve plate 2 hovers above the exhaust port 3, when the compressor stops, the sealing valve plate 2 is pressed on the upper surface of the sealing valve seat 1 by gravity again.

[0071] Different from the external one-way valve operation in the prior art, the sealing valve plate 2 arranged in the gas outlet is used to realize the plugging operation, wherein the movement of the sealing valve plate 2 is mainly realized by the gas, which will not affect the movement of the sealing valve plate 2, secondly, the area of the sealing valve plate 2 is greater than that of the exhaust port 3, which means that the sealing surface is large, and the small wear on the edge of the exhaust port 3 will not cause leakage, and different from the pressure of the spring, the sealing valve plate 2 moves by gas pressure, which has little effect on the sealing surface, because the spring has a failure phenomenon, and the present application does not worry about this problem.

[0072] Preferably, the sealing valve seat 1 comprises a valve core disc 4 positioned and connected in the air outlet, and the valve core disc 4 is provided with a sealing ring groove 6 on the outer surface of the peripheral side, and the first sealing ring 5 is positioned and connected in the sealing ring groove 6;

[0073] The air outlet 3 is arranged at the central position of the surface of the valve core disc 4, and the axes of the two coincide;

[0074] The upper surface of the valve core disc 4 is positioned and connected with the second sealing ring 7.

[0075] Although the axis of the air outlet 3 and the axis of the valve core disc 4 can have a set angle, the sealing effect of the sealing valve plate 2 is affected, for example, when the air outlet 3 is arranged obliquely, the sealing valve plate 2 also needs to be arranged obliquely, which causes the sealing valve plate 2 to be unable to be pressed on the upper surface of the sealing valve seat 1 as a whole, that is, there is a risk of leakage.

[0076] Preferably, the axes of the valve core disc 4 and the air outlet 3 coincide, and the axes of the valve core disc 4 and the sealing valve plate 2 coincide, so that the sealing valve plate 2 can be pressed on the upper surface of the valve core disc 4 as a whole, and the air outlet 3 can be fully blocked.

[0077] And by means of the above design, there will be no gap between the valve core disc 4 and the inner wall of the air outlet, that is, the gas entering the air outlet is only discharged through the air outlet 3, and the second sealing ring 7 plays a role in further blocking the gap between the upper surface of the sealing valve plate 2 and the valve core disc 4.

[0078] Preferably, the upper surface of the second sealing ring 7 exceeds the upper surface of the valve core disc 4.

[0079] By means of the above design, the second sealing ring 7 can fully fill the gap between the upper surface of the sealing valve plate 2 and the valve core disc 4 through deformation.

[0080] Preferably, the upper surface of the valve core disc 4 is provided with a circular groove 8, the inner side wall of the circular groove 8 is provided with a limiting groove 9, the second sealing ring 7 is positioned and connected in the limiting groove 9, and the anti-falling pressing plate 10 is positioned and connected in the circular groove 8, and the inner peripheral side wall of the anti-falling pressing plate 10 is matched with the outer peripheral side wall of the second sealing ring 7.

[0081] The anti-falling pressing plate 10 is interference-fitted with the circular groove 8.

[0082] The anti-falling pressing plate 10 is interference-fitted with the circular groove 8, and the assembly mode is hot sleeve assembly, and the interference amount can be determined according to the material. The height of the anti-falling pressing plate 10 needs to be lower than the groove depth of the circular groove 8 to prevent the sealing valve plate 2 from constantly hitting the anti-falling pressing plate 10 during the operation of the compressor, causing the anti-falling pressing plate 10 to fall off. The inner side of the anti-falling pressing plate 10 has a chamfer for pressing the second sealing ring 7 to prevent the second sealing ring 7 from falling off under stress.

[0083] By the above design, the second sealing ring 7 can be prevented from constantly hitting the anti-falling pressure plate 10 during use, so that the anti-falling pressure plate 10 and the second sealing ring 7 are not forced to fall off.

[0084] Preferably, the diameter of the limiting groove 9 is arranged in an increasing trend from top to bottom.

[0085] By the above design, the limiting groove 9 cooperates with the chamfer inside the anti-falling pressure plate 10 to press the second sealing ring 7.

[0086] Preferably, the sealing valve plate 2 is rotatably connected to the air outlet by a rotating valve rod arranged on the inner side wall of the air outlet.

[0087] By the above design, the sealing valve plate 2 only moves in the area directly above the air outlet 3 regardless of how it moves.

[0088] Preferably, the air outlet comprises a positioning groove 11 and an air vent 12, which are arranged in sequence and coaxially along the direction from top to bottom, the sealing valve seat 1 is positioned and connected to the bottom of the positioning groove 11, the air vent 12 communicates with the positioning groove 11, and the diameter of the air vent 12 is greater than or equal to the diameter of the air outlet 3.

[0089] By the above design, the sealing valve seat 1 can be quickly positioned and has high stability.

[0090] Working principle:

[0091] The entire one-way valve structure is divided into two states, namely the reset state and the lifting state:

[0092] In the reset state, the sealing valve plate 2 is pressed on the upper surface of the sealing valve seat 1 by its own weight to block the air outlet 3.

[0093] It should be noted that when the air outlet 3 is exhausting, the air pressure needs to be greater than the weight of the sealing valve plate 2 to lift the sealing valve plate 2.

[0094] Once in the lifting state, the gas enters the air outlet, at this time, the gas entering the air outlet will push up the sealing valve plate 2, so that the sealing valve plate 2 hovers directly above the air outlet 3, that is, the sealing valve plate 2 rotates upward around the rotating valve rod as the center of rotation, until the sealing valve plate 2 rotates to a set angle, at this time, the impact force of the gas on the sealing valve plate 2 is equal to the weight of the sealing valve plate 2, and then the sealing valve plate 2 hovers directly above the air outlet 3. In this way, the lifting state is entered.

[0095] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A structure of a compressor built-in check valve, the check valve structure being provided in a gas outlet on a compressor, characterized in that: The one-way valve structure comprises a sealing valve seat (1) and a sealing valve plate (2); The gas outlet is arranged upward along the height direction of the compressor; The sealing valve seat (1) is positioned and connected in the gas outlet, the sealing valve seat (1) is arranged in a matched shape with the gas outlet, an exhaust port (3) is arranged on the sealing valve seat (1), the exhaust port (3) is arranged along the height direction of the sealing valve seat (1), and when the sealing valve seat (1) is positioned in the gas outlet, the gas entering the gas outlet is configured to be discharged only through the exhaust port (3); The sealing valve plate (2) is arranged above the exhaust port (3) along the direction from top to bottom, and the area of the sealing valve plate (2) is greater than the area of the exhaust port (3); The sealing valve plate (2) has a reset state and a lifted state; In the reset state, the sealing valve plate (2) is pressed on the upper surface of the sealing valve seat (1) by the weight to block the exhaust port (3); In the lifted state, the gas entering the gas outlet pushes up the sealing valve plate (2) to make the sealing valve plate (2) away from and open the exhaust port (3).

2. The compressor built-in check valve structure according to claim 1, characterized by: The sealing valve seat (1) comprises a valve core disc (4) positioned and connected in the gas outlet, the peripheral side outer surface of the valve core disc (4) is provided with a sealing ring groove (6), and the first sealing ring (5) is positioned and connected in the sealing ring groove (6); The exhaust port (3) is arranged on the surface center position of the valve core disc (4), and the axes of the two coincide; The upper surface of the valve core disc (4) is positioned and connected with the second sealing ring (7).

3. The compressor built-in check valve structure according to claim 2, characterized by: The upper surface of the second sealing ring (7) exceeds the upper surface of the valve core disc (4).

4. The compressor built-in check valve structure according to claim 2, characterized by: The upper surface of the valve core disc (4) is provided with a circular groove (8), the inner side wall of the circular groove (8) is provided with a limiting groove (9), the second sealing ring (7) is positioned and connected in the limiting groove (9), the anti-disengagement pressing plate (10) is positioned and connected in the circular groove (8), and the inner peripheral side wall of the anti-disengagement pressing plate (10) is attached to the outer peripheral side wall of the second sealing ring (7). The anti-disengagement pressing plate (10) is in interference fit with the circular groove (8).

5. The compressor built-in check valve structure according to claim 4, characterized by: The inner side of the anti-disengagement pressing plate (10) has a chamfer configured to press the second sealing ring (7).

6. The compressor built-in check valve structure according to claim 4, characterized by: The height of the anti-disengagement pressing plate (10) is less than the groove depth of the circular groove (8).

7. The compressor built-in check valve structure according to claim 4, characterized by: From top to bottom, the diameter of the limiting groove (9) is arranged in an increasing trend.

8. The compressor built-in check valve structure according to claim 1, characterized by: The sealing valve plate (2) is rotationally connected in the gas outlet through a rotating valve rod arranged on the inner side wall of the gas outlet.

9. The compressor built-in check valve structure according to claim 1, characterized by: The gas outlet comprises a positioning groove (11) and a gas passage (12), the positioning groove (11) and the gas passage (12) are sequentially and coaxially arranged along the direction from top to bottom, the sealing valve seat (1) is positioned and connected at the groove bottom of the positioning groove (11), the gas passage (12) is communicated with the positioning groove (11), and the diameter of the gas passage (12) is greater than or equal to the diameter of the exhaust port (3).

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