CN211422864U - Lift limiter, exhaust valve assembly and compressor - Google Patents

Abstract

The application discloses lift stopper, discharge valve subassembly and compressor. The lift limiter comprises a limiting piece, wherein the limiting piece comprises a flat part and a bent part, and the bent part is bent relative to the flat part; the limiting piece is of a hollow structure, and hollow areas are formed on the flat part and the bent part; the area of the hollow area is larger than that of the un-hollow area of the limiting piece. Through setting up the locating part into hollow out construction, and the fretwork is regional to be formed at flat portion and kink to the regional area of injecing the fretwork is greater than the regional area of the non-fretwork of locating part, the lift stopper that this application provided can promote the speed that the exhaust valve piece bounced off and reset relatively, and then eliminates the influence of lift stopper to the bounced off and reset rate of exhaust valve piece.

Description

Lift limiter, exhaust valve assembly and compressor

Technical Field

The application relates to the technical field of compressors, in particular to a lift limiter, an exhaust valve assembly and a compressor.

Background

In the conventional hermetic compressor, the discharge valve plate can control the open/close state of the discharge hole of the cylinder to maintain the balance of the gas pressure in the cylinder, thereby ensuring the normal operation of the compressor. However, if the opening of the discharge valve plate is large in the open state, the return impact stress applied when the discharge valve plate is reset to cover the discharge hole is correspondingly large, so that the discharge valve plate is easy to generate fatigue fracture, and the reliability of the compressor is greatly reduced. In addition, when the opening of the exhaust valve plate is large, timely resetting is difficult to guarantee, and the loss of gaseous refrigerant is easy to cause too much, so that the normal operation of the compressor is influenced. For this reason, a lift stopper for limiting the maximum opening degree of the discharge valve sheet is also generally provided in the conventional compressor to solve the above-mentioned problem.

On the other hand, the existence of the lift limiter can additionally influence the bouncing-off and resetting speed of the exhaust valve plate, and further influence the exhaust efficiency of the compressor and the sealing efficiency of the exhaust hole of the compressor to a certain extent. Therefore, further optimization design of the structure of the existing lift limiter is needed.

SUMMERY OF THE UTILITY MODEL

The application mainly provides a lift limiter, an exhaust valve component and a compressor, and aims to solve the problem that the rebound and reset rate of an exhaust valve plate are influenced due to the existence of the lift limiter.

In order to solve the technical problem, the application adopts a technical scheme that: a lift limiter is provided. The lift limiter comprises a limiting piece, wherein the limiting piece comprises a flat part and a bent part, and the bent part is bent relative to the flat part; the limiting piece is of a hollow structure, and hollow areas are formed on the flat part and the bent part; the area of the hollow area is larger than that of the un-hollow area of the limiting piece.

In some embodiments, the stopper is made of a bent wire, and the area surrounded by the bent wire is the hollowed-out area.

In some embodiments, the wire is made of carbon steel, alloy steel or stainless steel.

In some embodiments, an end of the bent portion away from the flat portion is circular or polygonal.

In some embodiments, the lift limiter further includes a pressing block, and the pressing block is pressed on the flat portion to fix the limiting member to the discharge valve plate of the compressor.

In some embodiments, the pressing block is provided with a pressing groove, and the flat portion made of the wire is embedded in the pressing groove.

In some embodiments, the acute angle formed between the flat portion and the bent portion is 0 to 10 °.

In order to solve the above technical problem, another technical solution adopted by the present application is: an exhaust valve assembly is provided. The exhaust valve assembly comprises an exhaust valve plate and the lift limiter, wherein the exhaust valve plate is fixedly connected with a flat part of the lift limiter.

In some embodiments, a projection of the position-limiting element on the exhaust valve plate along a direction perpendicular to the exhaust valve plate is located in an area of the exhaust valve plate.

In order to solve the above technical problem, another technical solution adopted by the present application is: a compressor is provided. The compressor includes a discharge valve assembly as described above.

The beneficial effect of this application is: in contrast to the prior art, the present application discloses a lift limiter, an exhaust valve assembly and a compressor. The limiting part is set to be of a hollow-out structure, the hollow-out area is formed on the flat part and the bent part, the area of the limited hollow-out area is larger than the area of the non-hollow-out area of the limiting part, and therefore it is guaranteed that air pressure between the bent part and the exhaust valve block is always air pressure of the external space of the limiting part, pressure difference between two sides of the exhaust valve block is relatively large, the bouncing and resetting speed of the exhaust valve block is further improved, and the influence of the lift limiter on the bouncing and resetting speed of the exhaust valve block is eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:

FIG. 1 is a schematic top view of an embodiment of a stop in a lift stop provided herein;

FIG. 2 is a schematic side view of the position limiting member shown in FIG. 1;

fig. 3 is a schematic top view illustrating a limiting member according to another embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating an embodiment of a pressure block in a lift limiter provided herein;

FIG. 5 is a schematic structural view of another embodiment of a compact provided herein;

FIG. 6 is a schematic illustration of a top view of an embodiment of a vent valve assembly provided herein;

FIG. 7 is a side view schematic of the vent valve assembly of FIG. 6.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Fig. 1 is a schematic top view and fig. 7 is a schematic side view of an embodiment of a stop in a lift stop provided herein.

As shown in fig. 1 and 7, the lift limiter 100 is applied to a compressor, and the lift limiter 100 is fixedly connected to a discharge valve plate 210 of the compressor to limit the maximum opening of the discharge valve plate 210 relative to a discharge hole 212.

As shown in fig. 1 and 2, the lift stopper 100 includes a stopper 10, the stopper 10 includes a flat portion 12 and a bent portion 14, the bent portion 14 is bent relative to the flat portion 12, and the flat portion 12 is fixedly connected to the exhaust valve plate.

When the exhaust valve plate 210 covers the exhaust hole 212 on the compressor valve body, a gap is formed between the bent part 14 and the exhaust valve plate 210; when the vent valve plate 210 is pressed by the air flow of the vent hole 212 and bends toward the limiting member 10, the bending portion 14 is used to limit the maximum opening of the vent valve plate to ensure that the maximum opening of the vent valve plate 210 is proper, so that the vent valve plate 210 is easy to reset, and the excessive loss of gaseous refrigerant due to the excessive maximum opening of the vent valve plate 210 is avoided, and the recovery stress of the vent valve plate 210 during resetting is limited, thereby reducing the risk of fatigue fracture of the vent valve plate 210 due to repeated rebound.

In order to facilitate the quick resetting of the vent valve 210 to cover the vent hole 212 to reduce the loss of the gaseous refrigerant, the position-limiting member 10 adopts a hollow structure to increase the pressure difference between the two sides of the vent valve 210, so that the vent valve 210 can be quickly closed to cover the vent hole 212.

Specifically, the limiting member 10 is a hollow structure, and the hollow area 16 is formed on the flat portion 12 and the bending portion 14; the area of the hollowed-out region 16 is greater than the area of the un-hollowed-out region of the limiting member 10, so that it is ensured that the air pressure between the bending portion 14 and the exhaust valve plate 210 is always the air pressure of the external space of the limiting member 10, the pressure difference between two sides of the exhaust valve plate 210 is relatively large, the bouncing-off and resetting speed of the exhaust valve plate 210 is further increased, the elasticity of the limiting member 10 is further facilitated to be increased, and the limiting member 10 plays a good role in buffering to reduce the impact speed, the contact stress and the impact noise of the exhaust valve plate 210 on the limiting member 10.

The limiting member 10 covers the air vent 210, and when the air vent 210 is pressed by the rush airflow and bends toward the limiting member 10, the air pressure between the air vent and the bending portion 14 is always the air pressure in the space outside the limiting member 10 because the limiting member 10 has the hollow area 16. If the limiting member 10 does not have the hollow area 16 or is only provided with a process hole thereon, due to the blocking and limiting of the bent portion 14 above the exhaust valve sheet 210, in the process that the exhaust valve sheet 210 bends toward the bent portion 14, the air pressure between the exhaust valve sheet 210 and the bent portion 14 is compressed to increase the air pressure, and the pressure difference between the two sides of the exhaust valve sheet 210 is relatively reduced, so that the bouncing rate of the exhaust valve sheet 210 is relatively slow, which is not beneficial to the rapid exhaust of the exhaust hole 212.

In the process of resetting the vent valve plate 210, the air pressure between the vent valve plate 210 and the bent portion 14 is always the air pressure in the space outside the position-limiting member 10. If the limiting member 10 does not have the hollow area 16, the exhaust valve sheet 210 is attached to the limiting member 10 due to the blocking of the bent portion 14 above the exhaust valve sheet 210, and further there is almost no gap between the exhaust valve sheet 210 and the bent portion 14, so that during the resetting process of the exhaust valve sheet 210, the absorption force of the bent portion 14 on the exhaust valve sheet 210 is large, and relatively, the pressure difference between two sides of the exhaust valve sheet 210 is small, so that the resetting rate of the exhaust valve sheet 210 is relatively slow, which is not beneficial to the exhaust valve sheet 210 to rapidly cover the exhaust port 212.

Therefore, according to the present application, the limiting member 10 is set to be a hollow structure, the hollow area 16 is formed on the flat portion 12 and the bent portion 14, and the area of the hollow area 16 is limited to be larger than the area of the non-hollow area of the limiting member 10, so that it is ensured that the air pressure between the bent portion 14 and the exhaust valve plate 210 is always the air pressure in the external space of the limiting member 10, and the pressure difference between the two sides of the exhaust valve plate 210 is relatively large, so as to increase the bouncing and resetting speed of the exhaust valve plate 210.

In the present embodiment, the acute angle formed between the flat portion 12 and the bent portion 14 is 0 to 10 °. Since the stopper 10 has elasticity, the angle range enables the bending portion 14 to limit the maximum opening of the exhaust valve plate 210 within a proper range, so that the exhaust valve plate 210 is easy to reset.

In this embodiment, the limiting member 10 is made by bending a wire rod, the area surrounded by the wire rod is a hollow area 16, and the area of the hollow area 16 is larger than the area occupied by the wire rod itself, and the wire rod bending process is simple and the material cost is low. The limiting member 10 made of a wire material has a small cross-sectional area and good elasticity as a whole, so that the air vent valve plate 210 can be well buffered, the impact velocity of the air vent valve plate 210 can be reduced, the contact stress with the air vent valve plate 210 can be relieved, and the impact noise between the air vent valve plate 210 and the limiting member can be reduced.

The wire is made of carbon steel, alloy steel or stainless steel, so that the limiting part 10 has better strength, and the wire is bent to form the limiting part 10, so that the limiting part 10 has good elastic performance.

In other embodiments, the limiting member 10 can also be made of a plate material, for example, the plate material is stamped to form the limiting member 10. The hollow area 16 may further include a plurality of hollow holes, so that the air pressure of the air release valve towards the bending portion 14 is always the air pressure of the external space of the limiting member 10, thereby increasing the pressure difference between the two sides of the air release valve 210.

Further, as shown in fig. 1 and 3, the end of the bent portion 14 away from the flat portion 12 is circular or polygonal. It should be noted that the end of the bent portion 14, which is circular or polygonal, corresponds to the end of the cover vent hole 212 of the vent valve plate 210, so as to prevent the end of the vent valve plate 210, which is used for covering the cover vent hole 212, from deforming, which is beneficial to reducing the risk that the cover vent hole 212 is not tight due to deformation of the vent valve plate 210.

In this embodiment, as shown in fig. 4 to 7, the lift limiter 100 further includes a pressing block 20, and the pressing block 20 is pressed on the flat portion 12 to fix the limiting member 10 on the discharge valve plate 210 of the compressor.

Specifically, the pressing block 20 has an assembly hole 21, the pressing block 20 is pressed on the flat portion 12, the fastener is inserted into the assembly hole 21 and passes through the hollow area 16 to be fixedly connected with the air release valve plate 210, the pressing block 20 can relatively increase the contact area with the flat portion 12, and thus the limiting member 10 has good stability and is not easy to loosen and fall off.

Further, a pressing groove 22 is formed in the pressing block 20, and the flat portion 12 made of the wire is embedded in the pressing groove 22, so that the stability of the limiting member 10 can be further improved, and the limiting member 10 can be prevented from loosening.

In other embodiments, the flat portion 12 may be directly pressed and fastened on the exhaust sheet by a fastener (e.g., a screw).

Based on this, as shown in fig. 6 and 7, the present application further provides an exhaust valve assembly 200, the exhaust valve assembly 200 includes an exhaust valve sheet 210 and the lift stopper 100 as described above, the lift stopper 100 is stacked above the exhaust valve sheet 210, and the exhaust valve sheet 210 is fixedly connected to the flat portion 12 of the lift stopper 100.

The outline of the limiting element 10 may be the same as or different from the outline of the exhaust valve plate 210, and the projection of the limiting element 10 on the exhaust valve plate 210 along the direction perpendicular to the exhaust valve plate 210 (i.e., the stacking direction of the lift limiter 100 and the exhaust valve plate 210) is located in the area of the exhaust valve plate 210, so that the lift limiter 100 can perform a good limiting function on the exhaust valve plate 210, and is beneficial to improving the bouncing and resetting speed of the limiting element 10, and can enable the exhaust hole 212 to exhaust and cover the exhaust hole 212 quickly, thereby further being beneficial to improving the performance of the compressor.

Based on this, the present application further provides a compressor comprising the discharge valve assembly 200 as described above.

In contrast to the prior art, the present application discloses a lift limiter, an exhaust valve assembly and a compressor. The limiting part is set to be of a hollow-out structure, the hollow-out area is formed on the flat part and the bent part, the area of the limited hollow-out area is larger than the area of the non-hollow-out area of the limiting part, and therefore it is guaranteed that air pressure between the bent part and the exhaust valve block is always air pressure of the external space of the limiting part, pressure difference between two sides of the exhaust valve block is relatively large, the bouncing and resetting speed of the exhaust valve block is further improved, and the influence of the lift limiter on the bouncing and resetting speed of the exhaust valve block is eliminated.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. The lift limiter for the compressor is characterized by comprising a limiting piece, wherein the limiting piece comprises a flat part and a bent part, and the bent part is bent relative to the flat part; the limiting piece is of a hollow structure, and hollow areas are formed on the flat part and the bent part; the area of the hollowed-out area is larger than that of the un-hollowed-out area of the limiting piece.

2. The lift limiter of claim 1, wherein the limiter is made of a bent wire, and the area enclosed by the bent wire is the hollowed-out area.

3. The lift limiter of claim 2, wherein the wire is made of carbon steel, alloy steel, or stainless steel.

4. The lift limiter of claim 2, wherein an end of the bent portion away from the flat portion is circular or polygonal.

5. The lift limiter of claim 2, further comprising a pressing block, wherein the pressing block is pressed on the flat portion to fix the limiting member to the discharge valve plate of the compressor.

6. The lift limiter of claim 5, wherein the pressure block is provided with a pressure groove, and the flat portion of the wire is embedded in the pressure groove.

7. The lift limiter of claim 1, wherein the acute angle formed between the flat portion and the bent portion is 0 to 10 °.

8. An exhaust valve assembly, characterized in that the exhaust valve assembly comprises an exhaust valve plate and a lift limiter according to any one of claims 1 to 7, wherein the exhaust valve plate is fixedly connected with a flat part of the lift limiter.

9. The vent valve assembly of claim 8, wherein the retainer is positioned within an area of the vent panel as a projection of the retainer onto the vent panel in a direction perpendicular to the vent panel.

10. A compressor, characterized in that it comprises a discharge valve assembly according to any one of claims 8 to 9.

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