Exhaust valve plate assembly and compressor

Abstract

The utility model provides an exhaust valve plate assembly and a compressor. The exhaust valve plate assembly is fixed to an exhaust valve seat and used for closing or opening an exhaust hole in the exhaust valve seat, and the exhaust valve plate assembly comprises a valve plate and a baffle arranged on the side, away from the exhaust valve seat, of the exhaust valve plate. The baffle comprises a first connecting part, a limiting part and a buffering part which are sequentially connected, the limiting part is bent in the direction away from the valve plate, the buffering part is arranged on the side, away from the valve plate, of the limiting part, and the buffering part extends in the direction pointing to the first connecting part. By arranging the buffer part on the baffle, when the valve block collides with the baffle, the buffer part can absorb and dissipate part of energy acting on the baffle by the valve block, then the impact force counteracted on the valve block by the baffle can be reduced, the probability of fatigue fracture of the valve block is reduced, and the running reliability of the compressor is improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to an exhaust valve plate assembly and a compressor. Background Technology

[0002] A hermetic compressor includes an electric motor housed inside a sealed casing that generates driving force, and a compression component connected to the motor for compressing the refrigerant. Hermetic compressors can be classified into reciprocating compressors, scroll compressors, and rolling rotor compressors based on their refrigerant compressor structure.

[0003] During operation, a compressor periodically performs intake, compression, and exhaust processes. For example, when the compressor is running, the crankshaft rotates, driving the piston and blades in the cylinder to reciprocate, thus drawing in low-pressure refrigerant and compressing it into high-pressure refrigerant. When the pressure inside the cylinder exceeds the exhaust pressure, the high-pressure refrigerant opens the exhaust valve through the exhaust port to release the refrigerant. After exhausting, the valve closes to shut off the exhaust port, completing the intake, compression, and exhaust processes. The compressor cylinder head has an exhaust valve seat and an exhaust port. The exhaust valve assembly is fixed to an exhaust valve seat and is used to close or open the exhaust port on the exhaust valve seat. Traditional exhaust valve assemblies mainly consist of a valve plate, a baffle, a valve seat, and rivets. Figures 1 to 4 As shown, valve plate 20' is a flexible thin-film structure. During the exhaust phase, valve plate 20' opens, and its lift is limited by baffle 10'. After exhaust, valve plate 20' recovers its deformation due to its own rigidity. When the compressor exhausts, the high-pressure gas pushes valve plate 20' to open through the exhaust port, causing valve plate 20' to impact baffle 10' at high speed. The reciprocating impact between valve plate 20' and baffle 10' can lead to fatigue fracture of valve plate 20' and increased compressor noise, affecting the reliability of the compressor.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0005] In view of the problems in the prior art, the purpose of this utility model is to provide an exhaust valve plate assembly and a compressor, which reduces the impact force on the exhaust valve plate, reduces the probability of exhaust valve plate fatigue fracture, and improves the reliability of compressor operation.

[0006] This utility model embodiment provides an exhaust valve plate assembly, which is fixed on an exhaust valve seat and is used to close or open the exhaust hole on the exhaust valve seat. The exhaust valve plate assembly includes a valve plate and a baffle plate disposed on the side of the exhaust valve plate away from the exhaust valve seat.

[0007] The baffle comprises a first connecting portion, a limiting portion and a buffer portion connected in sequence, the limiting portion is bent in a direction away from the valve plate, the buffer portion is arranged on a side of the limiting portion away from the valve plate, and the buffer portion extends towards the first connecting portion.

[0008] In some embodiments, the buffer portion comprises a first component extending in a first direction and a second component extending in a second direction.

[0009] In some embodiments, the buffer portion has an L-shaped cross section.

[0010] In some embodiments, an end of the third connecting portion is a circular structure, and a length of the second component is 1-1.2 times a diameter of the circular structure.

[0011] In some embodiments, a thickness of the first connecting portion and the limiting portion is 0.5-1 mm, and a thickness of the buffer portion is 0.5-1.5 times the thickness of the first connecting portion. In some embodiments, the valve plate comprises a second connecting portion and a third connecting portion connected in sequence, and a part of the third connecting portion can block the exhaust hole.

[0012] In some embodiments, the buffer portion has an L max -shaped cross section. max In some embodiments, L max is a maximum length of the second component in the second direction, and M max is a maximum width of the second component perpendicular to the second direction in the same plane, and M max ≦L max ≦1.2M max .

[0013] In some embodiments, the buffer portion comprises a circular-like structure or an elliptical-like structure.

[0014] In some embodiments, the second component is a tongue spring.

[0015] In some embodiments, a first through hole is arranged on the first connecting portion of the baffle, a second through hole is arranged on the second connecting portion of the valve plate, and a bolt passes through the first through hole and the second through hole to screw the baffle and the valve plate to the exhaust valve seat.

[0016] Embodiments of the utility model also provide a compressor, which comprises:

[0017] a cylinder head having an exhaust valve seat and an exhaust hole; and

[0018] The exhaust valve plate assembly as claimed in any one of the above, is connected to the exhaust valve seat and used for opening and closing the exhaust hole.

[0019] The exhaust valve plate assembly and the compressor provided by the utility model have the following advantages.

[0020] By increasing the buffer part on the baffle, when the valve plate moves towards the baffle and hits the valve plate, the buffer part can absorb and dissipate part of the energy generated when hitting, so that the energy of the baffle acting on the valve plate can be reduced, that is, the impact force on the valve plate can be reduced, and the probability of fatigue fracture of the valve plate can be reduced; further, the vibration of the valve plate when periodically closing or opening the exhaust hole can be reduced, the noise during compression operation can be reduced, the comfort and stability of the compressor operation can be improved; compared with the exhaust valve plate assembly in the prior art, only the buffer part is added to the valve plate in the utility model, the structure of the valve plate is changed little, easy to manufacture, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0022] Figure 1 A perspective view of the baffle and the valve plate in the prior art is shown in the first view angle;

[0023] Figure 2 A perspective view of the baffle and the valve plate in the prior art is shown in the second view angle;

[0024] Figure 3 A top view of the baffle and the valve plate in the prior art is shown;

[0025] Figure 4 A side view of the baffle and the valve plate in the prior art is shown;

[0026] Figure 5 A schematic view of the baffle and the valve plate provided by an embodiment of the utility model is shown in the first view angle;

[0027] Figure 6 A schematic view of the baffle and the valve plate provided by an embodiment of the utility model is shown in the second view angle;

[0028] Figure 7 A top view of the baffle and the valve plate provided by an embodiment of the utility model is shown;

[0029] Figure 8 A side view of the baffle and the valve plate provided by an embodiment of the utility model is shown.

[0030] Reference signs:

[0031] 10' baffle in the prior art

[0032] 20' valve plate in the prior art

[0033] 10 The baffle plate in the embodiment of the present utility model

[0034] 11 The first connecting part

[0035] 12 The limiting part

[0036] 13 The buffering part

[0037] 131 The first component

[0038] 132 The second component

[0039] 20 The valve plate in the embodiment of the present utility model

[0040] 21 The second connecting part

[0041] 22 The third connecting part DETAILED DESCRIPTION

[0042] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of an example implementation to those skilled in the art. Like reference numerals refer to like elements throughout the several views of the drawings and similar terminology can be repeated although for clarity and conciseness of the description the terms "exemplary," "one example," or "some examples" can not be repeatedly used in connection with every related aspect, feature, or function of the example implementations. In this application, the terms "one example," "some examples," "an example," "one specific example," or "some specific examples," etc., mean that a particular implementation has been described in detail and do not imply that this implementation is preferred or required. In addition, a particular feature, structure, or characteristic can be combined in any suitable manner in one or more implementations. Furthermore, the terminology and phraseology employed herein are for descriptive purposes and should not be viewed as limiting. Terminology can be used in different contexts to describe similar or identical structures.

[0043] In addition, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms "first," "second," and / or the like can be understood to denote at least one of the elements. As used herein, the term "a number of" something means one or more things of that particular thing. In addition, the terms "comprising," "including," "containing," and / or "having" and / or variations thereof, are intended to be broad and inclusive, and allow for the possibility of additional elements, features, and / or components.

[0044] It is to be further understood that the terms "comprises", "comprising", "includes", "including", "contains", "containing", "consists" and / or "consisting" do not preclude the presence or addition of one or more other features, steps, operations, elements, components, items, and / or groups thereof. As used herein, the terms "or" and "and / or" are to be interpreted as inclusive, i.e., as meaning one or any combination of the listed items. Thus, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when a combination of elements, functions, steps or operations is inherently mutually exclusive is an exception to this definition presented.

[0045] To solve the problems in the background art, the utility model embodiment provides an exhaust valve plate assembly for closing or opening the exhaust hole on the exhaust valve seat, the exhaust valve plate assembly comprises a valve plate and a baffle arranged on the side of the exhaust valve plate away from the exhaust valve seat; the baffle comprises a first connecting part, a limiting part and a buffer part connected in sequence, the limiting part is bent in the direction away from the valve plate, the buffer part is arranged on the side of the limiting part away from the valve plate, and the buffer part extends towards the first connecting part. The technical scheme provided by the utility model sets up the buffer part on the baffle, when the exhaust makes the valve plate open and hits the baffle, the buffer part absorbs and dissipates part of the energy transmitted by the valve plate hitting the baffle, and then the energy of the baffle acting on the valve plate will be reduced, i.e. the impact force on the valve plate is reduced, the probability of fatigue fracture of the valve plate is reduced, the impact force on the valve plate is reduced, the vibration generated when the valve plate repeatedly opens and closes is reduced, and then the noise during the operation of the compressor is reduced, the comfort and working stability of the operation of the compressor are improved; compared with the exhaust valve plate assembly in the prior art, only the buffer part is added on the valve plate in the utility model, the structure of the valve plate is changed little, the valve plate is easy to manufacture, and the cost is small.

[0046] The exhaust valve plate assembly provided by the utility model will be explained and described in detail in combination with the embodiments below.

[0047] As Figures 5 to 8 As shown in the utility model embodiment, an exhaust valve plate assembly is fixed on an exhaust valve seat and used for closing or opening an exhaust hole on the exhaust valve seat. The exhaust valve plate assembly comprises a valve plate 20 and a baffle 10 arranged on the side of the valve plate 20 away from the exhaust valve seat (not shown in the drawing), and the valve plate 20 can close or open the exhaust hole on the exhaust valve seat 30. When the valve plate 20 is opened by the high-pressure gas, the baffle 10 limits the movement height of the valve plate 20 after being opened.

[0048] Further, the baffle 10 comprises a first connecting portion 11, a limiting portion 12 and a buffering portion 13 connected in sequence, the limiting portion 12 is bent in a direction away from the valve plate 20, the buffering portion 13 is arranged on a side of the limiting portion 12 away from the valve plate 20, and the buffering portion 13 extends towards the first connecting portion 11.

[0049] By adding the buffering portion 13 on the baffle 10, when the valve plate 20 moves towards the baffle 10 and collides with the valve plate 20, the buffering portion 13 can absorb and dissipate part of the energy generated during the collision, so as to reduce the energy of the baffle 10 acting on the valve plate 20, that is, to reduce the impact force of the valve plate 2, and to reduce the probability of fatigue fracture of the valve plate 20; further, the vibration of the valve plate 20 during periodic closing or opening of the exhaust hole can be reduced, the noise during compression operation can be reduced, and the comfort and stability of the compressor operation can be improved; compared with the exhaust valve plate assembly in the prior art, only the buffering portion 13 is added on the valve plate 20 in the utility model, the structure of the valve plate 20 is changed little, the valve plate 20 is easy to manufacture, and the production cost of the changed valve plate 20 is small.

[0050] Further, please continue to refer to Figure 8 , the buffering portion 13 comprises a first part 131 extending in a first direction and a second part 132 extending in a second direction. Here, the first direction is the thickness direction of the valve plate 20, and the second direction is perpendicular to the thickness direction of the valve plate 20. In the embodiment of the utility model, the cross section of the buffering portion 13 is L-shaped. The buffering portion 13 with L-shaped cross section can dissipate part of the energy transmitted to the baffle 10 by the valve plate through shaking.

[0051] As shown in Figures 5 to 7 , in some embodiments, the buffering portion 13 comprises a circular structure or an elliptical structure. For example, in the embodiment of the utility model, the second part 132 is a tongue spring. The tongue spring is a flexible metal sheet shaped like a tongue (elliptical structure), when energy is transmitted to the tongue spring, the tongue spring will shake several times to dissipate part of the energy, so that the impact force of the baffle acting on the valve plate is reduced. The shape of the second part 132 is not limited to the tongue spring shown, and those skilled in the art can change the shape of the second part 132 according to actual needs to meet the needs of the buffering performance.

[0052] In some embodiments, the thickness of the first connecting portion 11 and the limiting portion 12 of the baffle 10 is 0.5mm-1mm, and the thickness of the buffering portion 13 is 0.5-1.5 times the thickness of the first connecting portion 11. For example, the thickness of the first connecting portion 11 and the limiting portion 12 is 0.6mm, 0.7mm, 0.8mm, 0.9mm. The thickness range of the baffle 10 is set to make the baffle 10 have good rigidity, so that the baffle 10 has good anti-deformation ability.

[0053] Further, the curvature of the limiting portion 12 is set to a conventional size in the prior art, so that the valve plate 20 can be attached to the baffle 10 with a large area.

[0054] Further, please refer to Figure 7 and Figure 8 , the valve plate 20 includes a second connecting portion 21 and a third connecting portion 22 connected in sequence, and at least part of the third connecting portion 22 can block the exhaust hole of the compressor.

[0055] Further, refer to Figure 7 The schematic structure of the valve plate 20 shown by the dashed portion, the buffer portion 13 has L max and M max , wherein L max is the maximum length of the second component in the second direction, M max is the maximum width of the second component perpendicular to the second direction in the same plane, and satisfies M max ≦L max ≦1.2M max , the size of the buffer portion 13 is reasonably set, so that the buffer portion 13 can play a better buffering function.

[0056] Further, as shown in Figures 5 to 7 , the first connecting portion 11 of the baffle 10 is provided with a first through hole, and the second connecting portion 21 of the valve plate 20 is provided with a second through hole, and a bolt can pass through the first through hole and the second through hole to screw the baffle 10 and the valve plate 20 to the exhaust valve seat.

[0057] Further, as shown in Figure 8 , the first connecting portion 11 and the second connecting portion 21 have the same shape. The above structure can make the first connecting portion 11 and the second connecting portion 21 more closely attached, which is convenient for processing and manufacturing.

[0058] In order to confirm that the baffle 10 provided with the buffer portion 13 in the exhaust valve plate assembly provided in the embodiment of the utility model can reduce the impact force received by the valve plate 20, the impact force received by the valve plate 20' of the exhaust valve plate assembly in the prior art and the valve plate 20 of the exhaust valve plate assembly in the embodiment of the utility model are compared by simulation test. The impact process of the valve plate and the baffle during the compressor exhaust process is simulated, the valve plate is opened under the action of the pressure difference force, and the impact force is generated by impacting the baffle. Table 1 below shows the impact force received by the valve plate 20' in the exhaust valve plate assembly in the prior art when opening, and table 2 below shows the impact force received by the valve plate 20' in the exhaust valve plate assembly provided in the embodiment of the utility model when opening.

[0059] Table 1 Impact force received by the valve plate 20' impacting the baffle 10' in the prior art and the impact force received by the valve plate 20 impacting the baffle 10 in the embodiment of the utility model simulation calculation result

[0060]

[0061] According to Table 1, the maximum impact force on the valve plate 20' in the prior art over time is 518.58N, and the maximum impact force on the valve plate 20 in the embodiment of the present application over time is 253.27N. Therefore, the impact force on the valve plate 20 in the embodiment of the present application is less than the impact force on the valve plate 20' in the prior art. Therefore, the setting of the buffer portion 13 of the baffle 10 can significantly improve the impact force on the valve plate 20.

[0062] The embodiment of the present application also provides a compressor, which comprises a cylinder cover and the exhaust valve plate assembly as described above, the cylinder cover is provided with an exhaust valve seat and an exhaust hole, and the exhaust valve plate assembly is connected to the exhaust valve seat and used for opening and closing the exhaust hole. Therefore, the compressor provided by the embodiment of the present application can achieve all the technical effects of the exhaust valve plate assembly, reduce the impact force on the valve plate during periodic opening and closing, reduce the probability of fatigue fracture of the valve plate, reduce the noise generated during the operation of the compressor, and improve the comfort and working reliability of the compressor.

[0063] In summary, the exhaust valve plate assembly and the compressor provided by the present application have the following advantages:

[0064] By adding the buffer portion to the baffle, when the valve plate moves towards the baffle and collides with the valve plate, the buffer portion can absorb and dissipate part of the energy generated during the collision, thereby reducing the energy of the baffle acting on the valve plate, i.e. reducing the impact force on the valve plate, and reducing the probability of fatigue fracture of the valve plate. Furthermore, the vibration of the valve plate during periodic closing or opening of the exhaust hole can be reduced, the noise during the operation of the compressor can be reduced, and the comfort and working stability of the compressor during operation can be improved. Compared with the exhaust valve plate assembly in the prior art, only the buffer portion is added to the valve plate in the present application, the structure of the valve plate is changed little, the valve plate is easy to manufacture, and the cost is low.

[0065] The above content is a further detailed description of the present application in combination with the specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. An exhaust valve plate assembly, fixed to an exhaust valve seat, for closing or opening an exhaust hole in said exhaust valve seat, characterized in that, The exhaust valve plate assembly comprises a valve plate and a baffle arranged on the side of the valve plate away from the exhaust valve seat; the baffle comprises a first connecting portion, a limiting portion and a buffer portion connected in sequence, the limiting portion is bent in the direction away from the valve plate, the buffer portion is arranged on the side of the limiting portion away from the valve plate, and the buffer portion extends towards the first connecting portion.

2. The exhaust valve blade assembly of claim 1, wherein, The buffer portion comprises a first component extending in a first direction and a second component extending in a second direction.

3. The exhaust valve blade assembly of claim 2, wherein, The cross section of the buffer portion is L-shaped.

4. The exhaust valve blade assembly of claim 1, wherein, The thickness of the first connecting portion and the limiting portion is 0.5mm-1mm, and the thickness of the buffer portion is 0.5-1.5 times the thickness of the first connecting portion.

5. The exhaust valve blade assembly of claim 2, wherein, The valve plate comprises a second connecting portion and a third connecting portion connected in sequence, and part of the structure of the third connecting portion can block the exhaust hole.

6. The exhaust valve blade assembly of claim 4, wherein, The buffer portion has L max and M max , wherein L max is the maximum length of the second component in the second direction, M max is the maximum width of the second component in the same plane perpendicular to the second direction, and M max ≦ L max ≦ 1.2M max .

7. The exhaust valve blade assembly of claim 6, wherein, The buffer portion comprises a circular structure or an elliptical structure.

8. The exhaust valve blade assembly of claim 7, wherein, The second component is a tongue spring.

9. The exhaust valve blade assembly of claim 7, wherein, A first through hole is arranged on the first connecting portion of the baffle, a second through hole is arranged on the second connecting portion of the valve plate, and a bolt passes through the first through hole and the second through hole to screw the baffle and the valve plate to the exhaust valve seat.

10. A compressor characterized by, Comprise: A cylinder head having an exhaust valve seat and an exhaust hole; and The exhaust valve plate assembly according to any one of claims 1 to 9 is connected to the exhaust valve seat and used for opening and closing the exhaust hole.

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