Exhaust check valve, scroll compressor and air conditioning equipment

Abstract

The utility model discloses an exhaust check valve, a scroll compressor and air conditioning equipment, and the exhaust check valve comprises a top plate, an air return through hole is formed in the top plate, and the air return through hole penetrates through the top plate in the thickness direction of the top plate; the supporting structure is arranged on one side of the top plate in the thickness direction of the top plate, one end of the supporting structure is connected to the top plate, and the other end of the supporting structure is used for being connected to the static scroll plate; the valve plate is movably arranged on the supporting structure, and the valve plate is used for blocking the air return through hole or the exhaust port of the static scroll plate; the electromagnet is arranged on the other side of the top plate in the thickness direction of the top plate; at least part of the valve plate is of a metal structure capable of being attracted by the electromagnet. According to the structure, the valve plate can be prevented from being separated from the top plate in the operation process of the scroll compressor, so that the valve plate can be prevented from continuously impacting the top plate due to intermittent exhaust of the scroll compressor, abrasion of the valve plate and the top plate can be reduced, and noise is reduced.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to an exhaust check valve, a scroll compressor, and an air conditioning device. Background Technology

[0002] The main mechanical components of a scroll compressor include a frame, a moving scroll, a stationary scroll, and an eccentric crankshaft. The moving scroll is supported by the frame, and its lower part is mounted on the eccentric crankshaft. During operation, the eccentric crankshaft is driven to rotate by a motor, which in turn drives the moving scroll. The moving scroll works in conjunction with the stationary scroll to complete the actions of intake, compression, and exhaust.

[0003] When a scroll compressor stops, the return gas flow drives it to reverse, which causes significant noise. To mitigate this reversal and reduce noise, a check valve is typically installed at the exhaust port of the stationary scroll. A traditional check valve usually consists of a top plate and a valve plate. The top plate is positioned in the exhaust direction of the stationary scroll's exhaust port and spaced apart from it. The valve plate is movably positioned between the top plate and the exhaust port via a guide structure. A return gas passage is provided on the top plate. When the scroll compressor is running, the valve plate adheres to the top plate and blocks the return gas passage under exhaust pressure, allowing gas to escape through the gap between the valve plate and the exhaust port. When the scroll compressor stops, the valve plate detaches from the top plate and blocks the exhaust port under return gas pressure, thus limiting the return gas flow from driving the compressor to reverse. However, since the scroll compressor in operation discharges intermittently, that is, it does not discharge continuously, when the scroll compressor finishes its current discharge action, the discharge pressure at the discharge port drops. At this time, the valve plate will be impacted by the return airflow and temporarily detach from the top plate. Then the scroll compressor will discharge again, causing the valve plate that has detached from the top plate to stick back to the top plate under the action of discharge pressure. This process is repeated, and the valve plate will continuously hit the top plate, which will not only wear down the valve plate and the top plate, but also generate noise. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an exhaust check valve that can prevent the valve plate from detaching from the top plate during the operation of the scroll compressor, thereby preventing the valve plate from continuously impacting the top plate due to the intermittent exhaust of the scroll compressor, and thus reducing wear on the valve plate and the top plate and reducing noise.

[0005] This application also proposes a scroll compressor having the aforementioned exhaust check valve.

[0006] This application also proposes an air conditioning device having the aforementioned scroll compressor.

[0007] An exhaust check valve according to a first aspect embodiment of this application includes: a top plate having a return air passage extending through the top plate along its thickness direction; a support structure disposed on one side of the top plate along its thickness direction, one end of the support structure being connected to the top plate and the other end of the support structure being connected to a stationary vortex disk; a valve plate movably disposed on the support structure and used to block the return air passage or the exhaust port of the stationary vortex disk; and an electromagnet disposed on the other side of the top plate along its thickness direction; wherein at least a portion of the valve plate is a metal structure capable of being attracted by the electromagnet.

[0008] The exhaust check valve according to the embodiments of this application has at least the following beneficial effects: an electromagnet is provided on the side of the top plate facing away from the valve plate, and at least a portion of the valve plate is a metal structure that can be attracted by the electromagnet. When the scroll compressor is running, the valve plate adheres to the top plate and blocks the return air passage under the action of exhaust pressure. At this time, exhaust is discharged through the gap between the valve plate and the exhaust port of the stationary scroll plate. Although the scroll compressor is intermittently exhausting, the valve plate can be attracted by the electromagnet so that the valve plate can be kept in a state of adhering to the top plate to block the return air passage. That is, the valve plate can be restricted from detaching from the top plate during the operation of the scroll compressor, thereby preventing the valve plate from continuously hitting the top plate due to the intermittent exhaust of the scroll compressor, thereby reducing the wear of the valve plate and the top plate and reducing noise. When the scroll compressor stops, the electromagnet is de-energized to release the attraction of the valve plate. At this time, the valve plate can detach from the top plate under the action of the return gas pressure and block the exhaust port of the stationary scroll plate to prevent the scroll compressor from reversing under the drive of the return gas flow. This can prevent the scroll compressor from reversing violently and causing a lot of noise.

[0009] According to some embodiments of this application, the top plate is provided with a groove communicating with the return air passage on the side facing the valve plate. The diameter of the groove is larger than the diameter of the return air passage. The orthographic projection of the return air passage along the thickness direction of the top plate falls within the range of the orthographic projection of the groove along the thickness direction of the top plate.

[0010] According to some embodiments of this application, the diameter of the return air passage is d, and the diameter of the groove is D, wherein 5d≤D≤10d.

[0011] According to some embodiments of this application, the diameter of the return air passage is 1mm to 3mm.

[0012] According to some embodiments of this application, the depth of the groove is 0.5 mm to 2 mm.

[0013] According to some embodiments of this application, the exhaust check valve further includes a gasket, which is disposed at one end of the support structure away from the top plate and is used to fit against the stationary vortex disk. The valve plate is located between the top plate and the gasket, and the gasket is provided with a first clearance through hole for docking with the exhaust port of the stationary vortex disk.

[0014] According to some embodiments of this application, the support structure includes at least two guide posts arranged side by side and spaced apart. One end of each guide post is connected to the top plate, and the other end of each guide post is used to connect to the stationary vortex disk. The valve plate is provided with a first mounting through hole for passing through the guide post, and the guide post passes through the corresponding first mounting through hole.

[0015] According to some embodiments of this application, the gasket is provided with a second mounting through hole for passing through one end of the guide post away from the top plate, and the guide post is provided with a limiting step for abutting against the gasket.

[0016] A scroll compressor according to a second aspect of this application includes an exhaust check valve according to the first aspect of this application described above.

[0017] An air conditioning device according to a third aspect of this application includes a scroll compressor according to the second aspect of this application described above.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of an exhaust check valve according to an embodiment of this application when it is assembled on a stationary vortex disk;

[0021] Figure 2 This is an exploded view of an embodiment of the exhaust check valve of this application;

[0022] Figure 3 This is an exploded view of an embodiment of the exhaust check valve of this application from another perspective;

[0023] Figure 4 This is a schematic diagram of the state when the valve plate in the exhaust check valve of an embodiment of this application detaches from the top plate and blocks the exhaust port of the stationary vortex disk.

[0024] Figure 5 yes Figure 4 Enlarged view of a portion of point A in the middle;

[0025] Figure 6 This is a schematic diagram of the state in which the valve plate of the exhaust check valve in one embodiment of this application is attached to the top plate to block the return air passage.

[0026] Figure label:

[0027] a) Static vortex disk; b) Exhaust port; c) Threaded connection hole;

[0028] Top plate 100, return air hole 110, groove 120, countersunk hole 130;

[0029] Valve plate 200, first mounting through hole 210;

[0030] Electromagnet 300;

[0031] Gasket 400, first clearance through hole 410, second mounting through hole 420;

[0032] Guide post 500, limiting step 510, second clearance through hole 520. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the description of this application, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] In the description of this application, if words such as several, greater than, less than, exceeding, above, below, or within appear, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, and "above," "below," "within," etc. are understood to include the number itself.

[0036] In the description of this application, the use of terms such as "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0037] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 6 The exhaust check valve according to an embodiment of this application includes a top plate 100, a support structure, a valve plate 200, and an electromagnet 300.

[0039] Specifically, a return air passage 110 is provided on the top plate 100, and the return air passage 110 penetrates the top plate 100 along the thickness direction. A support structure is provided on one side of the top plate 100 along the thickness direction. One end of the support structure is connected to the top plate 100, and the other end of the support structure is used to connect to the stationary vortex a. A valve plate 200 is movably provided on the support structure. The valve plate 200 is used to block the return air passage 110 or the exhaust port b of the stationary vortex a. That is, the valve plate 200 can not only fit against the top plate 100 to block the return air passage 110, but also can detach from the top plate 100 to block the exhaust port b of the stationary vortex a. An electromagnet 300 is provided on the other side of the top plate 100 along the thickness direction. At least a part of the valve plate 200 is a metal structure that can be attracted by the electromagnet 300.

[0040] It should be noted that the thickness direction of the top plate 100 mentioned above is the X direction in the attached figure.

[0041] An electromagnet 300 is provided on the side of the top plate 100 facing away from the valve plate 200, and at least a portion of the valve plate 200 is a metal structure that can be attracted by the electromagnet 300. When the scroll compressor is running, the valve plate 200 adheres to the top plate 100 and blocks the return air passage 110 under the action of the discharge pressure. At this time, exhaust is discharged through the gap between the valve plate 200 and the exhaust port b of the stationary scroll plate a. Although the scroll compressor is discharging intermittently during operation, the valve plate 200 can be attracted by the electromagnet 300 so that the valve plate 200 can remain adhered to the top plate 100 to block the return air passage 110. This can limit the valve plate 200 from detaching from the top plate 100 during the operation of the scroll compressor, thereby preventing the valve plate 200 from continuously impacting the top plate 100 due to the intermittent discharge of the scroll compressor, thus reducing the wear of the valve plate 200 and the top plate 100 and reducing noise. When the scroll compressor stops, the electromagnet 300 is de-energized to release the attraction of the valve plate 200. At this time, the valve plate 200 can detach from the top plate 100 under the action of the return gas pressure and block the exhaust port b of the stationary scroll plate a, so as to prevent the scroll compressor from reversing under the drive of the return gas flow, thereby preventing the scroll compressor from reversing violently and causing a lot of noise.

[0042] Of course, a solenoid valve can be used instead of a traditional exhaust check valve. However, solenoid valves are more complex in structure and more prone to damage, and they need to be installed inside the scroll compressor, making them difficult to replace. Compared to using a solenoid valve instead of a traditional exhaust check valve, the exhaust check valve in this embodiment has a simple structure and is less prone to damage. Even if the electromagnet 300 is damaged, the exhaust check valve in this embodiment can still be used as a traditional exhaust check valve, thus not affecting the function of "preventing the scroll compressor from violently reversing and causing excessive noise when it stops."

[0043] Reference Figures 1 to 3 In some of these embodiments, the electromagnet 300 is annular, thereby avoiding the return air vent 110.

[0044] Reference Figure 3 , Figure 4 and Figure 6 In some embodiments, the top plate 100 is provided with a groove 120 communicating with the return air passage 110 on the side facing the valve plate 200. The diameter of the groove 120 is larger than the aperture of the return air passage 110. The orthographic projection of the return air passage 110 along the thickness direction of the top plate 100 falls within the range of the orthographic projection of the groove 120 along the thickness direction of the top plate 100. During the operation of the scroll compressor, when the current exhaust action is completed, the exhaust pressure at the exhaust port b of the stationary scroll a decreases. At this time, the valve plate 200 will be impacted by the return airflow flowing out of the return air passage 110. However, after the return airflow flows out of the return air passage 110, it needs to pass through the groove 120 before impacting the valve plate 200. The diameter of the groove 120 is larger than the diameter of the return air passage 110, which increases the cross-sectional area of ​​the return airflow when it enters the groove 120 from the return air passage 110. This reduces the flow velocity of the return airflow, thereby reducing the return air pressure acting on the valve plate 200. This weakens the impact of the return airflow on the valve plate 200 and prevents the valve plate 200 from detaching from the top plate 100 due to the impact of the return airflow overcoming the attraction of the electromagnet 300 during the operation of the scroll compressor.

[0045] In some of these embodiments, the diameter of the return air passage 110 is d, and the diameter of the groove 120 is D, wherein 5d≤D≤10d. Based on this ratio, the flow rate of the return airflow entering the groove 120 through the return air passage 110 can be reduced better without increasing the volume of the top plate 100.

[0046] In practical applications, if the diameter of the return air passage 110 is too large, the contact area between the valve plate 200 and the top plate 100 will be small. In this case, the adhesion between the valve plate 200 and the top plate 100 due to the oil seal will be small, making it easy for the valve plate 200 to detach from the top plate 100 due to the impact of the return airflow during the operation of the scroll compressor. That is, the valve plate 200 is prone to continuously impacting the top plate 100 due to the intermittent exhaust of the scroll compressor. If the diameter of the return air passage 110 is too small, the contact area between the valve plate 200 and the top plate 100 will be large. In this case, the adhesion between the valve plate 200 and the top plate 100 due to the oil seal will be large, making it easy for the valve plate 200 to detach from the top plate 100 in time due to the impact of the return airflow and block the exhaust port b of the stationary scroll plate a when the scroll compressor stops. This will cause the scroll compressor to reverse violently and cause a lot of noise. Based on this, in some embodiments, the diameter of the return air passage 110 is 1mm to 3mm, so that the amount of adhesion between the valve plate 200 and the top plate 100 caused by the oil seal is more appropriate.

[0047] Specifically, the diameter of the return air vent 110 can be 1mm, 3mm, 2mm, or other values ​​within the above range, and is not limited here.

[0048] In some embodiments, the depth of the groove 120 is 0.5 mm to 2 mm, wherein the depth of the groove 120 refers to the dimension of the groove 120 along the thickness direction of the top plate 100.

[0049] Specifically, the depth of the groove 120 can be 0.5mm, 2mm, 1mm, or other values ​​within the above range, without limitation.

[0050] Reference Figures 1 to 6 In some embodiments, the exhaust check valve of this application further includes a gasket 400. The gasket 400 is disposed at the end of the support structure away from the top plate 100 and is used to fit against the stationary scroll a. The valve plate 200 is located between the top plate 100 and the gasket 400. The gasket 400 is provided with a first clearance through hole 410 for docking with the exhaust port b of the stationary scroll a. By providing the gasket 400, it is possible to prevent the valve plate 200 from impacting the stationary scroll a due to the impact of the return airflow when the scroll compressor stops, thereby helping to prevent the valve plate 200 from wearing the stationary scroll a.

[0051] Reference Figure 2 and Figure 3In some embodiments, the support structure includes at least two parallel and spaced guide posts 500. One end of each guide post 500 is connected to the top plate 100, and the other end is connected to the stationary scroll plate a. The valve plate 200 has a first mounting through hole 210 for the guide post 500 to pass through. The guide post 500 passes through the corresponding first mounting through hole 210, allowing the valve plate 200 to move relative to the guide post 500 along its axial direction. This structure is simple and easy to implement. Specifically, the number of guide posts 500 is three. Compared to the case with only two guide posts 500, this helps prevent the valve plate 200 from shifting vertically due to uneven force during its vertical movement relative to the guide post 500, thus reducing the likelihood of jamming and wear caused by vertical shifting.

[0052] Reference Figure 2 , Figure 3 and Figure 5 In some embodiments, the gasket 400 is provided with a second mounting through hole 420 for the end of the guide post 500 away from the top plate 100 to pass through, and the guide post 500 is provided with a limiting step 510 for abutting against the gasket 400. During assembly, the gasket 400 can be positioned by the limiting step 510, and after assembly, the limiting step 510 can restrict the axial movement of the gasket 400 along the guide post 500.

[0053] Reference Figures 2 to 6 In some embodiments, the top plate 100 is provided with a countersunk hole 130 for passing a screw, and the guide post 500 is provided with a second clearance through hole 520 for passing a screw. The second clearance through hole 520 passes through the guide post 500 along the axial direction of the guide post 500. Correspondingly, the stationary vortex a is provided with a threaded connection hole c. During assembly, the screw is passed through the countersunk hole 130 and the second clearance through hole 520 in sequence and threaded into the threaded connection hole c.

[0054] It should be noted that in some other embodiments, the guide post 500 may also be integrally formed on the top plate 100, which is not limited here.

[0055] It should be noted that in some other embodiments, the gasket 400 can also be connected to the stationary vortex disk a by screws, which is not limited here. In this case, the aforementioned limiting step 510 is not required.

[0056] It should be noted that in some other embodiments, a sliding groove is provided on the inner side of the guide post 500, the sliding groove extends along the axial direction of the guide post 500, and a sliding part that is slidably connected to the sliding groove is provided at the edge of the valve plate 200. In this case, it is not necessary to provide the first mounting through hole 210 mentioned above.

[0057] The scroll compressor according to an embodiment of this application includes the exhaust check valve described above.

[0058] It is understood that since the scroll compressor of the embodiments of this application includes the above-mentioned exhaust check valve, the scroll compressor of the embodiments of this application has all the technical effects of the above-mentioned exhaust check valve.

[0059] An air conditioning device according to an embodiment of this application includes the scroll compressor described above.

[0060] It is understood that since the air conditioning equipment of the embodiments of this application includes the scroll compressor described above, the air conditioning equipment of the embodiments of this application has all the technical effects of the scroll compressor described above.

[0061] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust check valve, characterized in that, include: A top plate, wherein a return air passage is provided on the top plate, and the return air passage penetrates the top plate along the thickness direction of the top plate; A support structure is provided on one side of the top plate along the thickness direction of the top plate, one end of the support structure is connected to the top plate, and the other end of the support structure is used to connect to the stationary vortex disk. A valve plate, which is movably mounted on the support structure, is used to block the exhaust port of the return air passage or the exhaust port of the stationary vortex disk; An electromagnet is disposed on the other side of the top plate along the thickness direction of the top plate; At least a portion of the valve plate is a metal structure that can be attracted by the electromagnet.

2. The exhaust check valve as described in claim 1, characterized in that, The top plate has a groove connected to the return air passage on the side facing the valve plate. The diameter of the groove is larger than the diameter of the return air passage. The orthographic projection of the return air passage along the thickness direction of the top plate falls within the range of the orthographic projection of the groove along the thickness direction of the top plate.

3. The exhaust check valve as described in claim 2, characterized in that, The diameter of the return air passage is d, and the diameter of the groove is D, wherein 5d≤D≤10d.

4. The exhaust check valve as described in claim 2, characterized in that, The diameter of the return air passage is 1mm to 3mm.

5. The exhaust check valve as described in claim 2, characterized in that, The depth of the groove is 0.5mm to 2mm.

6. The exhaust check valve as described in any one of claims 1 to 5, characterized in that, The exhaust check valve also includes a gasket, which is disposed at the end of the support structure away from the top plate and is used to fit against the stationary vortex disk. The valve plate is located between the top plate and the gasket, and the gasket is provided with a first clearance through hole for docking with the exhaust port of the stationary vortex disk.

7. The exhaust check valve as described in claim 6, characterized in that, The support structure includes at least two guide pillars arranged side by side and spaced apart. One end of each guide pillar is connected to the top plate, and the other end of each guide pillar is connected to the stationary vortex disk. The valve plate is provided with a first mounting through hole for the guide pillar to pass through, and the guide pillar passes through the corresponding first mounting through hole.

8. The exhaust check valve as described in claim 7, characterized in that, The gasket has a second mounting through hole for the end of the guide post away from the top plate to pass through, and the guide post has a limiting step for abutting against the gasket.

9. A scroll compressor, characterized in that, Includes the exhaust check valve as described in any one of claims 1 to 8.

10. An air conditioning device, characterized in that, Including the scroll compressor as described in claim 9.

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