Check valve, scroll compressor and air conditioner

Abstract

The present invention provides a check valve, a scroll compressor and an air conditioner, wherein the check valve comprises: a valve seat, the valve seat is installed in the compressor enthalpy-increasing air supply channel, and a valve hole is arranged on the valve seat; a valve plate, the valve plate is arranged on the valve hole; a baffle, the baffle is arranged on the side of the valve plate away from the valve hole, and the baffle is used to limit the position of the valve plate; a fastener, the fastener fixes the baffle and the valve plate on the valve seat. The check valve of the present invention has a simple structure, convenient production and processing, low cost, and small size. It can be easily arranged in the enthalpy-increasing channel of the fixed scroll of the scroll compressor, close to the air supply enthalpy-increasing compression chamber, the check response is fast, the check effect is good, and the clearance volume in the check passage is small, which can effectively reduce the thermal expansion of the high-pressure refrigerant in the enthalpy-increasing pipeline and improve the energy efficiency of the compressor.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a check valve, a scroll compressor and an air conditioner. Background Art

[0002] The vortex enthalpy increase technology introduces the low-temperature and low-pressure refrigerant in the flash unit or economizer directly into the compression chamber in a compressed state. In order to solve the problem of refrigerant backflow to the air supply pipeline, a one-way check valve is usually set between the enthalpy increase air supply management and the compression chamber. However, the existing check valve is complex and an additional structure needs to be added to the compressor structure, which makes the compressor structure complex, larger in size and weight. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is that the existing check structure is complex and requires the addition of additional structures, which leads to a complex compressor structure, larger size and weight, thereby providing a check valve, a scroll compressor and an air conditioner.

[0004] In order to solve the above problems, the present invention provides a check valve, comprising:

[0005] A valve seat, the valve seat is installed in the compressor enthalpy increase air supply channel, and a valve hole is provided on the valve seat;

[0006] A valve plate, which is arranged on the valve hole;

[0007] A baffle, which is arranged on the side of the valve plate away from the valve hole and is used to limit the position of the valve plate;

[0008] Fasteners, fasteners fix the baffle and valve disc to the valve seat.

[0009] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0010] Preferably, the valve hole comprises an air inlet and an air outlet, the air inlet is connected to the air outlet, the valve plate is arranged on the air outlet, and the direction angle between the air outlet and the air inlet is α, satisfying 60°≤α≤180°.

[0011] Preferably, the air inlet is arranged on the first axial end surface of the valve seat, the second axial end surface of the valve seat is provided with a ventilation groove penetrating to the side surface of the valve seat, and the air outlet is arranged at the bottom of the ventilation groove.

[0012] Preferably, the depth of the ventilation groove gradually decreases along the direction from the second end surface to the first end surface.

[0013] Preferably, the valve plate is arranged at the bottom of the ventilation groove, the end of the valve plate covers the air outlet, the edge of the valve plate covers the distance to the outside of the air outlet greater than or equal to 0.5 mm, and / or the baffle is arranged at the bottom of the ventilation groove, and the area of ​​the baffle is greater than or equal to the area of ​​the valve plate.

[0014] Preferably, the width of the ventilation groove is smaller than the maximum width of the valve seat, and protrusions are formed on both sides of the ventilation groove in the length direction.

[0015] Preferably, a mounting hole is provided in the ventilation groove, the mounting hole is arranged close to the second end surface, and the fastener is installed in the mounting hole.

[0016] Preferably, the air inlet is a blind hole opened on the first end face of the valve seat along the flow direction of the supplementary gas, or the air inlet is a blind groove opened on the side face of the valve seat along the flow direction of the supplementary gas, and one end of the blind groove passes through the first end face of the valve seat.

[0017] Preferably, the check valve is arranged in the enthalpy increasing channel of the compressor, and a sealing portion is provided on the valve seat, which allows the gas in the enthalpy increasing channel to flow only in one direction through the valve hole.

[0018] Preferably, the outer wall of the sealing portion is interference fit with the inner wall of the enthalpy increasing channel, and / or a first sealing member is provided between the outer wall of the sealing portion and the inner wall of the enthalpy increasing channel.

[0019] Preferably, the enthalpy increase channel includes a stationary disk enthalpy increase channel and an upper cover enthalpy increase channel. The stationary disk enthalpy increase channel is arranged on the stationary scroll disk of the compressor and is connected with the compression chamber through the enthalpy increase hole. The upper cover enthalpy increase channel is arranged on the upper cover of the compressor, and the upper cover enthalpy increase channel is connected with the external air supply enthalpy increase pipeline.

[0020] Preferably, the fixed scroll disk is installed in cooperation with the upper cover, and a second seal is provided on the cooperation surface, and the second seal is used to seal the enthalpy increase channel to prevent gas leakage along the cooperation surface.

[0021] Preferably, the valve seat is a protruding structure arranged on the compressor upper cover, the valve hole is opened on the protruding structure, and the valve hole is connected with the external air-supplying and enthalpy-increasing pipeline through the enthalpy-increasing channel inside the upper cover.

[0022] Preferably, the protrusion structure extends into the stationary disk enthalpy increase channel of the stationary scroll disk of the compressor, the stationary disk enthalpy increase channel is connected with the compression chamber through the enthalpy increase hole, a stopper is provided in the stationary disk enthalpy increase channel, one side of the stopper is arranged in the direction of the valve plate away from the valve hole, and is used to limit the valve plate.

[0023] A scroll compressor adopts any one of the above-mentioned check valves.

[0024] An air conditioner adopts any one of the above-mentioned check valves.

[0025] The check valve, scroll compressor and air conditioner provided by the present invention have at least the following beneficial effects:

[0026] The check valve of the present invention has a simple structure, is easy to produce and process, has a low cost, and a small size. It can be easily arranged in the enthalpy increasing channel of the fixed scroll disk of the scroll compressor, close to the air replenishing enthalpy increasing compression chamber, has a fast check response, and a good check effect. At the same time, the clearance volume in the check passage is small, which can effectively reduce the thermal expansion of the high-pressure refrigerant in the enthalpy increasing pipeline and improve the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a check valve according to an embodiment of the present invention;

[0028] Figure 2 A structural cross-sectional view of a check valve according to an embodiment of the present invention;

[0029] Figure 3 A structural cross-sectional view of a valve seat according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of a check valve in use according to an embodiment of the present invention;

[0031] Figure 5 for Figure 4 A magnified view of middle;

[0032] Figure 6 A structural cross-sectional view of a check valve according to another embodiment of the present invention;

[0033] Figure 7 A schematic diagram of a check valve in use according to another embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of a check valve according to another embodiment of the present invention.

[0035] The reference numerals are:

[0036] 1. Valve seat; 2. Valve plate; 3. Valve hole; 4. Baffle; 5. Fastener; 6. Air inlet; 7. Air outlet; 8. First end face; 9. Second end face; 10. Vent groove; 11. Protrusion; 12. Mounting hole; 13. Blind hole; 14. Blind groove; 15. Enthalpy increase channel; 16. Sealing part; 17. First sealing member; 18. Static disk enthalpy increase channel; 19. Upper cover enthalpy increase channel; 20. Static vortex disk; 21. Upper cover; 22. Second sealing member; 23. Protrusion structure; 24. Block; 25. Enthalpy increase hole; 26. Compression chamber. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] Combination Figures 1 to 5 As shown, an embodiment of the present invention provides a check valve, including: a valve seat 1, the valve seat 1 is installed in the compressor enthalpy increase and air supply channel, and a valve hole 3 is provided on the valve seat 1; a valve plate 2, the valve plate 2 is arranged on the valve hole 3; a baffle 4, the baffle 4 is arranged on the side of the valve plate 2 away from the valve hole 3, and the baffle 4 is used to limit the valve plate 2; a fastener 5, the fastener 5 fixes the baffle 4 and the valve plate 2 on the valve seat 1.

[0039] The check valve of the embodiment of the present invention has a simple and independent structure, is easy to produce and process, has low cost and small size, and can be conveniently arranged in the enthalpy increasing channel of the fixed scroll disk of the scroll compressor, close to the air replenishing enthalpy increasing compression chamber, has a fast check response and a good check effect, and at the same time, the residual clearance volume in the check passage is small, which can effectively reduce the thermal expansion of the high-pressure refrigerant in the enthalpy increasing pipeline and improve the energy efficiency of the compressor.

[0040] The check valve of this embodiment is installed in the compressor as close to the compression chamber as possible, so the volume of the check valve is relatively high. However, due to the special installation space in the compressor, if the check valve is too small, the structural strength will be reduced, and if it is too large, the volume will be too large and inappropriate.

[0041] Preferably, the valve hole 3 of this embodiment includes an air inlet 6 and an air outlet 7, the air inlet 6 is connected to the air outlet 7, the valve plate 2 is arranged on the air outlet 7, and the direction angle between the air outlet 7 and the air inlet 6 is α, satisfying 90°≤α<180°. In this embodiment, the direction of the air outlet 7 is set to a certain angle, so that when the valve plate 2 is arranged at the position of the air outlet 7, the valve plate 2 can be set to a corresponding angle, thereby reducing the lateral span of the valve plate 2, and at least the volume of the check valve in one direction can be achieved. For example, in the scroll compressor of this embodiment, the enthalpy increase channel 15 is a cylindrical space, and arranging the valve plate 2 at a certain angle can make full use of the length space and reduce the radial space occupation.

[0042] Preferably, in order to match the shape of the enthalpy increase channel 15 of the scroll compressor, the valve seat 1 is a cylindrical structure, and the air inlet 6 is arranged on the first end face 8 of the valve seat 1 along the axial direction. At the same time, in order to keep the air outlet 7 at a certain angle with the air inlet 6 and not affect the normal air outlet of the air outlet 7, a ventilation groove 10 penetrating to the side of the valve seat 1 is opened on the second end face 9 of the valve seat 1 along the axial direction, and the air outlet 7 is arranged at the bottom of the ventilation groove 10. Therefore, the air supply airflow flowing out of the air outlet 7 first enters the ventilation groove 10, and then continues to flow to the enthalpy increase hole 25 along the ventilation groove 10.

[0043] Preferably, the depth D of the ventilation groove 10 gradually decreases along the direction from the second end surface 9 to the first end surface 8, so that the bottom of the ventilation groove 10 forms an inclined surface, which is convenient for installing components such as the valve plate 2.

[0044] Preferably, the valve plate 2 is arranged at the bottom of the vent groove 10, the end of the valve plate 2 covers the air outlet 7, and the distance from the edge of the valve plate 2 to the outside of the air outlet 7 is greater than or equal to 0.5 mm, thereby ensuring a sufficient covering size to achieve a better non-return seal. The baffle plate 4 is arranged at the bottom of the vent groove 10, and the area of ​​the baffle plate 4 is greater than or equal to the area of ​​the valve plate 2.

[0045] Preferably, the width of the ventilation groove 10 is smaller than the maximum width of the valve seat 1, and protrusions 11 are formed on both sides of the ventilation groove 10 in the length direction. The protrusions 11 formed by the reserved material of the ventilation groove 10 on the valve seat 1 can serve as a structure to further reduce harmful clearance. However, in special cases, when the clearance increment is small, the protrusions 11 can be directly cut off.

[0046] Preferably, a mounting hole 12 is provided in the vent groove 10, the mounting hole 12 is arranged close to the second end face 9, and the fastener 5 is installed in the mounting hole 12. In this embodiment, the mounting hole 12 is opened in the inclined vent groove 10, so that the fastener 5 can be arranged at an angle, thereby obtaining a longer bolt tightening dimension and reducing the outer diameter of the check valve at the fastener 5.

[0047] On the other hand, after the baffle 4 and the fastener 5 are assembled, in order to obtain a more regular enthalpy increasing channel (i.e., a circular hole type), it is necessary to ensure that the projection area of ​​the baffle 4 and the fastener 5 in the cross section of the enthalpy increasing channel 15 perpendicular to the enthalpy increasing channel 15 is smaller than the projection area of ​​the sealing part 16 in the cross section of the enthalpy increasing channel 15.

[0048] Preferably, in order to ensure the rationality of design and convenience of processing of the air inlet 6 on the valve seat 1, the air inlet 6 can be a blind hole 13 opened on the first end surface 8 of the valve seat 1 along the flow direction of the supplementary gas, and connected to the air outlet 7 at the bottom of the blind hole 13, or, as Figure 6As shown, in another embodiment of the present invention, the air inlet 6 can also be processed into a blind groove 14 opened on the side of the valve seat 1 along the flow direction of the supplementary gas, and one end of the blind groove 14 penetrates to the first end surface 8 of the valve seat 1 and is connected to the air outlet 7 at the bottom of the blind groove 14.

[0049] Preferably, the check valve is arranged in the enthalpy increasing channel 15 of the compressor, and a sealing portion 16 is arranged on the valve seat 1, and the outer wall of the sealing portion 16 is in contact with the inner wall of the enthalpy increasing channel 15, and the sealing portion 16 allows the gas in the enthalpy increasing channel 15 to flow only in one direction through the valve hole 3. Preferably, the outer wall of the sealing portion 16 is interference fit with the inner wall of the enthalpy increasing channel 15, and / or, as Figure 7 As shown, in another embodiment of the present invention, a first sealing member 17 is provided between the outer wall of the sealing portion 16 and the inner wall of the enthalpy increasing channel 15. The first sealing member 17 may be a sealing ring, which may be arranged in the enthalpy increasing channel 15 or placed on the sealing portion 16.

[0050] In this embodiment, the check valve is installed in the enthalpy increase channel 15, and the interference fit can be used to achieve sealing, ensuring that the gas replenishing refrigerant in the enthalpy increase channel 15 can only flow in one direction through the valve hole 3 of the check valve. However, a thread or other sealing structure can also be used between the check valve and the enthalpy increase channel 15.

[0051] Preferably, the enthalpy-increasing channel 15 includes a stationary disk enthalpy-increasing channel 18 and an upper cover enthalpy-increasing channel 19. The stationary disk enthalpy-increasing channel 18 is arranged on the stationary scroll 20 of the compressor and communicates with the compression chamber 26 through the enthalpy-increasing hole 25. The upper cover enthalpy-increasing channel 19 is arranged on the upper cover 21 of the compressor, and the upper cover enthalpy-increasing channel 19 is communicated with the external air supplement enthalpy-increasing pipeline. Preferably, the stationary scroll 20 is installed in conjunction with the upper cover 21, and a second seal 22 is provided on the matching surface. The second seal 22 is used to seal the enthalpy-increasing channel 15 to prevent gas leakage along the matching surface.

[0052] like Figure 8 As shown, in another embodiment of the present invention, the valve seat 1 is a protruding structure 23 arranged on the compressor upper cover 21, and the valve hole 3 is opened on the protruding structure 23. The valve hole 3 is connected to the external air supplementary enthalpy increasing pipeline through the enthalpy increasing channel 15 inside the upper cover 21.

[0053] Preferably, the protrusion structure 23 extends into the stationary disk enthalpy increase channel 18 of the stationary scroll disk 20 of the compressor. The stationary disk enthalpy increase channel 18 is connected to the compression chamber 26 through the enthalpy increase hole 25. A stopper 24 is provided in the stationary disk enthalpy increase channel 18. One side of the stopper 24 is arranged in the direction of the valve plate 2 away from the valve hole 3, which is used to limit the valve plate 2. In this embodiment, since the valve block 1 and the upper cover 21 have an integrated structural design, the valve seat 1 forms a part of the enthalpy increase passage 15 and serves as a mounting component of the valve plate 2. There is no need to seal the valve seat 1 and the enthalpy increase channel 15. In this embodiment, the stopper 24 that acts as a limit for the valve plate 2 has a large volume and can occupy the harmful clearance of the stationary disk enthalpy increase channel 18. When the space clearance of the stationary disk enthalpy increase channel 18 is not too large, such as less than 10% of the compression volume, the baffle 4 can also be used to limit the valve plate.

[0054] When the check valve of this embodiment is working, the refrigerant passes through the air inlet 6 of the valve seat 1 and reaches the air outlet 7. The other side of the valve plate 2 is at the same pressure as the compression chamber 26 due to the connected enthalpy increase hole 25. When the refrigerant pressure at the air outlet 7 is higher than (compression chamber pressure + valve plate opening pre-tightening force + passage resistance loss), the valve plate 2 is pushed open by the high-pressure gas at the air outlet 7 until it is limited by the upper baffle 4. The high-pressure gas passes through the valve plate 2 and enters the space of the vent groove 10, and finally enters the compression chamber 26 through the static plate enthalpy increase channel 18 and the enthalpy increase hole 25, so as to replenish the air and increase the enthalpy of the compression chamber 26. As the replenishment continues, the pressure in the compression chamber 26 gradually increases. When (compression chamber refrigerant pressure + valve plate opening pre-tightening pressure) is greater than (passage resistance loss + air outlet refrigerant pressure), the valve plate 2 is pushed back to the bottom surface of the vent groove 10. Since the valve plate 2 has a larger area than the air outlet 7, the connecting passage is cut off. The high-pressure gas in the compression chamber cannot flow back through the valve hole 3, and can only be accumulated and compressed in the compression chamber or the effective clearance space. When the pressure in the compression chamber drops again after the next compression cycle, it expands and flows back to the compression chamber. Therefore, all such spaces connected to the compression chamber will undergo the above-mentioned repeated compression and expansion process. The larger the spatial cavity is, the greater the loss of compression and expansion will be. Therefore, it is necessary to minimize the spatial volume of the structure connected to the compression chamber, and the present invention is designed based on this starting point.

[0055] Compared with other check structures, the components forming the check function of the present invention have a very small clearance in the enthalpy increase channel and can be controlled within 15% of the volume of the suction chamber, which has a greater impact on small-displacement compressors. The check valve of this embodiment can not only be used for checking the enthalpy increase pipeline of a vertical or scroll enthalpy increase scroll compressor, but can also be applied to other check passages with similar enthalpy increase passage structures.

[0056] A scroll compressor adopts any one of the above-mentioned check valves.

[0057] An air conditioner adopts any one of the above-mentioned check valves.

[0058] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A check valve, characterized in that: include: A valve seat (1), the valve seat (1) being installed in a compressor enthalpy-increasing air supply passage, and the valve seat (1) being provided with a valve hole (3); A valve plate (2), wherein the valve plate (2) is arranged on the valve hole (3); a baffle (4), the baffle (4) being arranged on a side of the valve plate (2) away from the valve hole (3), the baffle (4) being used for limiting the position of the valve plate (2); A fastener (5), wherein the fastener (5) fixes the baffle (4) and the valve plate (2) on the valve seat (1); The valve hole (3) comprises an air inlet (6) and an air outlet (7), the air inlet (6) is connected to the air outlet (7), the valve plate (2) is arranged on the air outlet (7), and the direction angle between the air outlet (7) and the air inlet (6) is α, which satisfies 60°≤α≤180°; The air inlet (6) is arranged on the first end face (8) of the valve seat (1) along the axial direction, and the second end face (9) of the valve seat (1) along the axial direction is provided with a ventilation groove (10) extending through the side of the valve seat (1). The air outlet (7) is arranged at the bottom of the ventilation groove (10), and the ventilation groove (10) is inclined. A mounting hole (12) is provided in the ventilation groove (10), and the mounting hole (12) is arranged close to the second end face (9), and the fastener (5) is installed in the mounting hole (12).

2. The check valve according to claim 1, characterized in that: The depth of the ventilation groove (10) gradually decreases along the second end surface (9) towards the first end surface (8).

3. The check valve according to claim 1, characterized in that: The valve plate (2) is arranged at the bottom of the ventilation groove (10), the end of the valve plate (2) covers the air outlet (7), the distance from the edge of the valve plate (2) to the outside of the air outlet (7) is greater than or equal to 0.5 mm, and / or the baffle plate (4) is arranged at the bottom of the ventilation groove (10), and the area of ​​the baffle plate (4) is greater than or equal to the area of ​​the valve plate (2).

4. The check valve according to claim 1, characterized in that: The width of the ventilation groove (10) is smaller than the maximum width of the valve seat (1), and protrusions (11) are respectively formed on both sides of the ventilation groove (10) in the length direction.

5. The check valve according to claim 1, characterized in that: The air inlet (6) is a blind hole (13) provided on the first end surface (8) of the valve seat (1) along the flow direction of the supplementary gas, or the air inlet (6) is a blind groove (14) provided on the side surface of the valve seat (1) along the flow direction of the supplementary gas, and one end of the blind groove (14) passes through the first end surface (8) of the valve seat (1).

6. The check valve according to any one of claims 1 to 5, characterized in that: The check valve is arranged in the enthalpy increasing channel (15) of the compressor, and a sealing portion (16) is provided on the valve seat (1). The sealing portion (16) allows the gas in the enthalpy increasing channel (15) to flow in one direction only through the valve hole (3).

7. The check valve according to claim 6, characterized in that: The outer wall of the sealing portion (16) is interference-fitted with the inner wall of the enthalpy increasing channel (15), and / or a first sealing member (17) is provided between the outer wall of the sealing portion (16) and the inner wall of the enthalpy increasing channel (15).

8. The check valve according to claim 7, characterized in that: The enthalpy-increasing channel (15) comprises a stationary disk enthalpy-increasing channel (18) and an upper cover enthalpy-increasing channel (19); the stationary disk enthalpy-increasing channel (18) is arranged on a stationary scroll disk (20) of the compressor and is connected to a compression chamber (26) through an enthalpy-increasing hole (25); the upper cover enthalpy-increasing channel (19) is arranged on an upper cover (21) of the compressor, and the upper cover enthalpy-increasing channel (19) is connected to an external air supply enthalpy-increasing pipeline.

9. The check valve according to claim 8, characterized in that: The fixed scroll disk (20) is mounted in cooperation with the upper cover (21), and a second sealing member (22) is provided on the cooperation surface. The second sealing member (22) is used to seal the enthalpy increasing channel (15) to prevent gas leakage along the cooperation surface.

10. The check valve according to claim 1, characterized in that The valve seat (1) is a protruding structure (23) arranged on the compressor upper cover (21); the valve hole (3) is opened on the protruding structure (23); and the valve hole (3) is connected to an external air-supplementing and enthalpy-increasing pipeline through an enthalpy-increasing channel (15) inside the upper cover (21).

11. The check valve according to claim 10, characterized in that The protrusion structure (23) extends into the stationary disk enthalpy increase channel (18) of the stationary scroll disk (20) of the compressor, and the stationary disk enthalpy increase channel (18) is connected to the compression chamber (26) through the enthalpy increase hole (25). A stopper (24) is provided in the stationary disk enthalpy increase channel (18), and one side surface of the stopper (24) is arranged in the direction of the valve plate (2) away from the valve hole (3) for limiting the valve plate (2).

12. A scroll compressor, characterized in that: A check valve according to any one of claims 1 to 11 is used.

13. An air conditioner, characterized in that: A check valve according to any one of claims 1 to 11 is used.

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