A new anti-reverse device and compressor

Abstract

This utility model discloses a novel anti-reverse rotation device and compressor, comprising a base assembly, a valve plate assembly, and a baffle assembly arranged sequentially. The base assembly has a base exhaust port; the valve plate assembly includes a valve plate that fits against the end face of the base exhaust port, with an exhaust gap between them; the baffle assembly includes a baffle located on the back of the valve plate, and the baffle has several ventilation holes. This device provides support by placing a baffle on the back of the valve plate, allowing the valve plate to adhere tightly to the baffle under frontal air pressure, avoiding noise and fatigue problems caused by suspension and impact. Simultaneously, under negative pressure, the valve plate can freely deform to seal the exhaust port. This utility model effectively reduces compressor operating noise, improves operational reliability, and extends valve plate lifespan.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a novel anti-reverse device and compressor. Background Technology

[0002] A scroll compressor consists of a sealed casing, a stationary scroll, a moving scroll, a support frame, an eccentric crankshaft, an anti-rotation mechanism, and a motor. Both the moving and stationary scrolls have helical profiles. The moving scroll is eccentrically positioned relative to the stationary scroll, with a 180° offset, creating multiple crescent-shaped spaces between them. The moving scroll rotates around the center of the stationary scroll with a certain eccentric radius, performing a non-rotating rotary translational motion. The outer crescent-shaped spaces continuously move towards the center, gradually pushing the refrigerant towards the central space. Its volume decreases while its pressure increases until it connects to the central exhaust port, at which point the high-pressure refrigerant is discharged from the pump body.

[0003] When a scroll compressor stops, the high-pressure refrigerant on the exhaust side will flow back to the suction side, causing reverse rotation noise and even damage to the pump body structure. Therefore, scroll compressors are equipped with an anti-reverse rotation mechanism.

[0004] Existing technologies typically employ a one-way check valve structure to achieve anti-reverse rotation functionality. For example, Chinese utility model patent CN102116292A, entitled "Check Valve Device for a Scroll Compressor," discloses a check valve device for a scroll compressor, which mainly includes a valve seat and a piston-type valve plate. The valve seat has a guide bore for guiding the movement of the valve plate, and the valve seat is fixed to the stationary scroll. The guide bore communicates with the discharge port of the stationary scroll. A shoulder is provided at the upper end of the valve seat, with a return air hole in the center of the shoulder. The valve plate moves upward or downward along the guide bore of the valve seat, and a coating is provided on the valve plate. The coating is an elastic coating. The coating includes a first upper coating and a first lower coating. The first upper coating covers the upper surface of the valve plate, and the first lower coating is arranged around the outer edge of the lower surface of the valve plate.

[0005] The aforementioned patent documents demonstrate that by providing an elastic coating on the valve plate, the impact or shock between the valve plate and the valve seat can be reduced, and the compressor can be prevented from rotating in reverse due to gas backflow during shutdown. At the same time, the valve plate noise caused by changes in operating conditions and airflow pulsation can be eliminated, thereby preventing the scroll from reversing due to high-pressure gas backflow and improving the reliability of the compressor.

[0006] However, the above structure, which uses a check valve as an anti-reverse mechanism, still has the following problems in use: First, under high speed and large displacement conditions, when the compressor is operating in a high pressure differential environment, the check valve plate will repeatedly impact the stationary plate and valve seat at extremely high speed, which will still cause the valve plate to tilt, wear or even break. Secondly, due to insufficient structural clearance and sealing, high-pressure gas can still flow back through the valve gaps, failing to completely prevent the compressor from reversing; it can only delay the reversal process. This results in excessive shutdown noise and abnormal wear of moving parts, severely impacting the compressor's reliability.

[0007] To solve the above-mentioned technical problems, the existing technology sets the anti-reverse structure as a valve plate plus a baffle. Although this structure can solve the problems caused by setting a check valve, it can also solve the problems caused by setting a check valve.

[0008] However, as scroll compressors develop towards higher speeds, the conventional valve plate and baffle method is prone to valve plate breakage under harsh operating conditions due to frequent valve plate opening, and its reliability and timeliness can no longer meet the requirements. Utility Model Content

[0009] This invention provides a novel anti-reverse device, which aims to solve the problem that existing technologies use valve plates and baffles as anti-reverse structures, but the valve plates are easily worn or even broken due to frequent opening.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: In one aspect, this utility model provides a novel anti-reverse device, comprising: a base assembly, a valve plate assembly, and a baffle assembly arranged sequentially; The base assembly includes a base, and the base is provided with a base vent hole; The valve plate assembly includes a valve plate, which is fitted to the end of the exhaust port of the base, and a gap is provided between the valve plate and the exhaust port of the base to facilitate airflow discharge; The baffle assembly includes a baffle that is fitted onto the side of the valve plate away from the base, and the baffle has a plurality of venting holes corresponding to the valve plate.

[0011] In one embodiment, the base includes a large semi-cylindrical base and a small semi-cylindrical base, which are connected by a base connecting plate; the base vent is provided on the large semi-cylindrical base.

[0012] In one embodiment, the height of the base gradually decreases from the small semi-cylinder of the base towards the large semi-cylinder of the base, and an arc surface is formed at one end face of the vent hole of the base.

[0013] In one embodiment, the arcuate surface smoothly transitions to the end face of the small semi-cylindrical base.

[0014] In one embodiment, the vent hole of the base is provided as an inclined surface on the side near the valve plate.

[0015] In one embodiment, the valve plate includes a large semi-cylinder and a small semi-cylinder, which are connected by a valve plate connecting plate.

[0016] In one embodiment, the valve plate has a valve plate mounting hole on its small semi-cylindrical part.

[0017] In one embodiment, the venting perforations are evenly distributed at positions corresponding to the exhaust holes of the base.

[0018] In one embodiment, a mounting ring groove is provided on the base, and the mounting ring groove is located around the vent hole of the base; a sealing ring is provided inside the mounting ring groove.

[0019] In another aspect, this utility model embodiment also provides a compressor including the novel anti-reverse device described above.

[0020] The advantages of this invention compared to existing technologies are as follows: By setting a baffle on the side of the valve plate away from the base, the baffle can support the valve plate. The air pressure in front of the static plate exhaust port can be discharged through the gap between the valve plate and the exhaust hole of the base. Under the action of the air pressure in front of the static plate exhaust port, the valve plate can always be in close contact with the baffle, avoiding the noise and fatigue problems caused by the valve plate hitting the baffle when the compressor is working, which is common with conventional valve plates. This ensures the reliability of compressor operation, effectively reduces pump noise, and significantly improves the reliability of valve plates and other parts.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0022] Figure 1 A practical application scenario diagram of a novel anti-reverse device and a compressor base exhaust port provided for embodiments of this utility model; Figure 2 A practical application scenario diagram of a novel anti-reverse device and a compressor base exhaust port when closed, provided for embodiments of this utility model; Figure 3 An exploded structural diagram of a novel anti-reverse device and compressor in a practical application scenario, provided by an embodiment of this utility model; Figure 4 A three-dimensional structural diagram of a novel anti-reverse device and a compressor valve plate provided for embodiments of this utility model; Figure 5 A top view of the base of a novel anti-reverse device and compressor provided for an embodiment of this utility model; Figure 6 A side view of the base of a novel anti-reverse device and compressor provided for an embodiment of this utility model; Figure 7 A side view of another embodiment of a novel anti-reverse device and compressor base provided for this utility model; Figure 8 A three-dimensional structural diagram of a novel anti-reverse device and a compressor baffle provided for embodiments of this utility model; Figure 9 A top view of a novel anti-reverse device and a compressor baffle provided for an embodiment of this utility model; Figure 10 A practical application scenario diagram of a novel anti-reverse device and compressor base with an installation ring groove provided for an embodiment of this utility model; Figure 11 This is a top view of the base of a novel anti-reverse device and compressor provided in this embodiment of the present invention, with an installation ring groove.

[0023] Figure label: 1. Base; 11. Base vent hole; 12. Base mounting hole; 13. Large semi-cylinder of base; 14. Small semi-cylinder of base; 15. Base connecting plate; 16. Arc surface; 17. Inclined surface; 18. Mounting ring groove. 2. Valve plate; 21. Valve plate mounting hole; 22. Large semi-cylinder of valve plate; 23. Small semi-cylinder of valve plate; 24. Valve plate connecting plate. 3. Baffle; 31. Ventilation perforation; 32. Baffle mounting hole; 33. Large semi-cylinder of the baffle; 34. Small semi-cylinder of the baffle; 35. Baffle connecting plate. 4. Static plate; 41. Static plate vent hole; L is the length of the side projection of the arc surface; A. The height of the small semi-cylinder at the base; B. Height of the base semi-cylinder; C. The projected length of the arc facing the horizontal plane. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0028] Please see Figure 1-3 This utility model provides a novel anti-reverse device. It includes: a base assembly, a valve plate assembly, and a baffle assembly arranged sequentially. The base assembly includes a base 1, and the base 1 is provided with a base vent 11; The valve plate assembly includes a valve plate 2, which is attached to the end of the base exhaust hole 11, and a gap is provided between the valve plate 2 and the base exhaust hole 11 to facilitate airflow discharge. The baffle assembly includes a baffle 3, which is attached to the side of the valve plate 2 away from the base 1. The baffle 3 is provided with a plurality of ventilation holes 31 corresponding to the valve plate 2.

[0029] in, Figure 1 This is a schematic diagram illustrating an application scenario of a novel anti-reverse device according to this embodiment. In this embodiment, a baffle 3 is provided on the side of the valve plate 2 away from the base 1, and the baffle 3 can support the valve plate 2. Figure 1 As shown, the air pressure at the front of the static plate exhaust port 41 can be discharged through the gap between the valve plate 2 and the base exhaust port 11. The valve plate 2, under the action of the air pressure at the front of the static plate exhaust port 41, can always remain tightly against the baffle 3, avoiding the noise and fatigue problems caused by the valve plate 2 suspending and striking the baffle 3 during compressor operation, thus ensuring the reliability of compressor operation and effectively reducing pump noise. Figure 2 As shown, if a vent hole 31 is provided on the baffle 3, the valve plate 2 can be freely deformed under the negative pressure on the back of the static plate exhaust hole 41, and fit against the end of the base exhaust hole 11 to block the base exhaust hole 11.

[0030] In a further embodiment, the base assembly includes a base 1 and base bolts for fixing the base 1 to the stationary plate 4; as shown Figure 5 As shown, the base 1 in this embodiment is provided with a base mounting hole 12, and the base bolt passes through the base mounting hole 12 to facilitate the fixed installation of the base 1 on the stationary plate 4 of the compressor.

[0031] The valve plate assembly includes valve plate 2 and valve plate bolts, such as Figure 4 As shown, a valve plate mounting hole 21 is provided through the valve plate 2. After the valve plate bolt passes through the valve plate mounting hole 21, it is fixedly connected to the base 1, so as to facilitate the installation of the valve plate 2 on the base 1.

[0032] The baffle assembly includes a baffle 3 and baffle bolts, such as Figure 8 As shown, a baffle mounting hole 32 is provided through the baffle 3. After the baffle bolt passes through the baffle mounting hole 32, it is fixedly connected to the valve plate 2, so that the baffle 3 can be installed on the back of the valve plate 2.

[0033] In this embodiment, to further simplify the structure, the base mounting hole 12, valve plate mounting hole 21, and baffle mounting hole 32 are arranged on the same axis when assembled together. Thus, a single bolt passes sequentially through the baffle mounting hole 32, valve plate mounting hole 21, and base mounting hole 12 before being fixed to the stationary disc 4. This allows the novel anti-reverse device of this application to be conveniently installed on the stationary disc 4.

[0034] Furthermore, to prevent the valve plate 2 and the baffle 3 from rotating around the bolt, the base mounting hole 12, the valve plate mounting hole 21, and the baffle mounting hole 32 can be designed as non-circular holes, such as hexagonal holes or elongated slots; the bolt ends are threaded, and the other parts are correspondingly designed as hexagonal segments or elongated slot segments with hexagonal cross-sections. Thus, the valve plate 2, the baffle 3, and the base 1 can be positioned by the engagement of the bolt with the base mounting hole 12, the valve plate mounting hole 21, and the baffle mounting hole 32.

[0035] In one embodiment, such as Figure 4 As shown, in this embodiment, the valve plate 2 is configured as a fan-shaped structure, with the longer end being the large end and the other end being the small end. The valve plate mounting hole 21 is located at the small end of the valve plate 2, and the large end of the valve plate 2 is used to correspond to the exhaust hole 11 of the base.

[0036] This structural design allows the valve plate 2 to deform more easily when it bends, as the deformed part is near the smaller end of the valve plate 2, where the cross-sectional area is smaller and more prone to bending. This makes the valve plate 2 more susceptible to deformation under negative air pressure. Meanwhile, the larger end of the valve plate 2 corresponds to the exhaust port 11 on the base, thus better sealing the exhaust port 11 and improving the airtightness between the valve plate 2 and the exhaust port 11.

[0037] In this embodiment, in order to optimize the structure, the valve plate 2 is configured to include a large semi-cylinder 22 and a small semi-cylinder 23, which are connected by a valve plate connecting plate 24.

[0038] The large semi-cylinder 22 of the valve plate corresponds to the exhaust hole 11 of the base, while the valve plate mounting hole 21 is located at the axis of the small semi-cylinder 23 of the valve plate. At this time, the large semi-cylinder 22 of the valve plate is the large end of the valve plate 2, and the small semi-cylinder 23 of the valve plate is the small end of the valve plate 2.

[0039] In a further embodiment, such as Figure 5 As shown, the base 1 corresponds to the structure of the valve plate 2. The base 1 is configured as a large semi-cylinder 13 and a small semi-cylinder 14, which are connected by a base connecting plate 15. The base exhaust hole 11 is provided on the large semi-cylinder 13. The base mounting hole 12 is provided on the small semi-cylinder 14.

[0040] In this embodiment, as Figure 5 and Figure 6 As shown, the height of the base 1 gradually decreases from the small semi-cylinder 14 of the base to the large semi-cylinder 13 of the base, and an arc surface 16 is formed on one end face of the exhaust hole 11 of the base.

[0041] like Figure 6 As shown, Figure 6 This is a side view of the base 1. The length of the arc surface 16 is L, the height of the large semi-cylinder 13 is B, the height of the small semi-cylinder 14 is A, and the projection length of the arc surface 1 onto the horizontal plane is C.

[0042] Where: L> A / 3 <B<2A / 3。

[0043] The arc surface 16 allows a gap to be left between the base 1 and the valve plate 2 when the valve plate 2 is in contact with the end face of the base exhaust hole 11, so that the air pressure on the front of the static plate exhaust hole 41 can be discharged from the gap between the valve plate 2 and the base exhaust hole 11.

[0044] In addition, when the valve plate 2 deforms due to the negative pressure of the static plate exhaust hole 41, the valve plate 2 can fit along the arc surface 16, which allows the valve plate 2 to fit better with the base 1.

[0045] Of course, such as Figure 7As shown, the end face of the base exhaust hole 11 can also be set as an inclined surface 17. When the valve plate 2 is in contact with the end face of the base exhaust hole 11, there can also be a gap between the inclined surface 17 and the valve plate 2, so that the air pressure on the front of the static plate exhaust hole 41 can be discharged from the gap between the valve plate 2 and the base exhaust hole 11.

[0046] In a further embodiment, the arc surface 16 smoothly transitions to the end face of the small semi-cylindrical base 14.

[0047] The arc surface 16 smoothly transitions to the end face of the small semi-cylindrical part of the base, so that when the valve plate 2 deforms, it can completely fit with the end face of the mounting hole 12 of the base. This allows the valve plate 2 to better seal the end face of the mounting hole 12 of the base, and it is not easy for gaps to appear when the valve plate 2 fits with the end face of the mounting hole 12 of the base.

[0048] In a further embodiment, such as Figure 8 and Figure 9 As shown, the baffle 3 is configured in a shape corresponding to the valve plate 2 and the base 1. Specifically, the baffle 3 is configured as a large semi-cylinder 33 and a small semi-cylinder 34, which are connected by a baffle connecting plate 35; the vent hole 31 is provided on the large semi-cylinder 33. The baffle mounting hole 32 is provided on the small semi-cylinder 34.

[0049] In a further embodiment, such as Figure 9 As shown, the ventilation holes 31 are evenly distributed at positions corresponding to the exhaust holes 11 of the base.

[0050] In this embodiment, the venting perforations 31 are evenly distributed on the semi-cylinder 33 of the baffle. This allows the valve plate 2 to react and deform quickly when subjected to negative pressure from the static plate exhaust port 41; ensuring that the valve plate 2 is subjected to uniform force when the compressor stops, thus avoiding stress concentration. In this embodiment, four venting perforations 31 are provided, and the four venting perforations 31 are evenly arranged on the semi-cylinder 33 of the baffle.

[0051] In a further embodiment, such as Figure 10 and Figure 11 As shown, in order to improve the sealing performance of the valve plate 2 when it is in contact with the exhaust hole 11 of the base, a sealing buffer structure is provided between the base 1 and the valve plate 2. The sealing buffer structure can improve the sealing performance between the base 1 and the valve plate 2, and also has the function of buffering and shock absorption, reducing the noise generated when the valve plate 2 hits the base 1.

[0052] In this embodiment, a mounting ring groove 18 is provided on the base 1, and the mounting ring groove 18 is located around the vent hole 11 of the base; a sealing ring is provided inside the mounting ring groove 18.

[0053] In this embodiment, the sealing ring is fixed together with the mounting ring groove 18 by the sealant, so that when the compressor stops, the valve plate 2 and the end face of the exhaust hole 11 of the base make soft contact, which further reduces the impact force on the valve plate 2 and has the function of buffering and noise reduction.

[0054] In a further embodiment, a buffer layer can be provided on the side of the baffle 3 facing the valve plate 2. The buffer layer has the function of buffering and reducing noise from the impact from the valve plate 2. The buffer layer can be made of rubber, which has a good buffering and shock absorption effect.

[0055] In another embodiment, such as Figures 1 to 3 As shown, this embodiment also provides a compressor, including a stationary plate 4, on which a stationary plate exhaust port 41 is provided, and the stationary plate 4 is also provided with the aforementioned novel anti-reverse device. Bolts pass through the baffle mounting hole 32, the valve plate mounting hole 21 and the base mounting hole 12 in sequence and are then fixedly connected to the stationary plate 4.

[0056] The specific implementation process of this embodiment, which can be used for reference, is as follows: When the compressor is running normally, under the action of airflow in front of the static plate exhaust port 41, the airflow flows out from the gap between the valve plate 2 and the base 1. The airflow continuously acts on the valve plate 2, and the valve plate 2 remains in close contact with the baffle 3 under the action of the airflow. The baffle 3 then supports the valve plate 2, and no fatigue stress is generated at this time. When the compressor stops, the valve plate 2 closes the base exhaust port 11 under the negative pressure of the static plate exhaust port 41. At this time, the valve plate 2 is in contact with the base exhaust port 11, and the valve plate 2 blocks the base exhaust port 11.

[0057] This application provides a baffle 3 on the side of the valve plate 2 away from the base 1, which supports the valve plate 2. The air pressure at the front of the stationary plate exhaust port 41 can be discharged through the gap between the valve plate 2 and the base exhaust port 11. Under the pressure at the front of the stationary plate exhaust port 41, the valve plate 2 remains in close contact with the baffle 3, avoiding the noise and fatigue problems caused by the valve plate 2 slamming against the baffle 3 when the compressor is operating. This ensures the reliability of the compressor operation, effectively reduces pump noise, and significantly improves the reliability of components such as the valve plate 2.

[0058] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A novel anti-reverse device, characterized in that, include: The base assembly, valve plate assembly, and baffle assembly are arranged sequentially. The base assembly includes a base, and the base is provided with a base vent hole; The valve plate assembly includes a valve plate, which is fitted to the end of the exhaust port of the base, and a gap is provided between the valve plate and the exhaust port of the base to facilitate airflow discharge; The baffle assembly includes a baffle that is fitted onto the side of the valve plate away from the base, and the baffle has a plurality of venting holes corresponding to the valve plate.

2. The novel anti-reverse device according to claim 1, characterized in that, The base includes a large semi-cylindrical base and a small semi-cylindrical base, which are connected by a base connecting plate; the base vent is provided on the large semi-cylindrical base.

3. The novel anti-reverse device according to claim 2, characterized in that, The height of the base gradually decreases from the small semi-cylinder of the base towards the large semi-cylinder of the base, and an arc surface is formed at one end face of the exhaust hole of the base.

4. The novel anti-reverse device according to claim 3, characterized in that, The arc surface smoothly transitions to the end face of the small semi-cylindrical base.

5. The novel anti-reverse device according to claim 2, characterized in that, The base exhaust port is set as an inclined surface on the side near the valve plate.

6. The novel anti-reverse device according to claim 1, characterized in that, The valve plate includes a large semi-cylinder and a small semi-cylinder, which are connected by a valve plate connecting plate.

7. The novel anti-reverse device according to claim 6, characterized in that, The valve plate has a valve plate mounting hole on its small semi-cylindrical part.

8. The novel anti-reverse device according to claim 1, characterized in that, The ventilation holes are evenly distributed at positions corresponding to the exhaust holes of the base.

9. The novel anti-reverse device according to any one of claims 1 to 6, characterized in that, An mounting ring groove is provided on the base, and the mounting ring groove is located around the vent hole of the base; a sealing ring is provided inside the mounting ring groove.

10. A compressor, characterized in that, The novel anti-reverse device includes any one of claims 1 to 9.

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