Exhaust valve plate assembly and compressor

Abstract

The invention 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] The invention relates to the technical field of compressors, and in particular to an exhaust valve plate assembly and a compressor. Background Art

[0002] The hermetic compressor includes a motor that is arranged inside a sealed housing and can generate a driving force, and a compression component connected to the motor for compressing the refrigerant. The hermetic compressor can be classified into a reciprocating compressor, a vortex compressor, and a rolling rotor compressor according to the different structures of the refrigerant compressor.

[0003] During operation, the compressor will periodically perform the processes of intake, compression and exhaust. For example, when the compressor is running, the rotation of the crankshaft drives the piston in the cylinder to rotate and the blades to reciprocate, and the low-pressure refrigerant sucked into the cylinder is compressed into high-pressure refrigerant; when the cavity pressure in the cylinder is greater than the exhaust pressure, the high-pressure refrigerant opens the exhaust valve plate through the exhaust port to exhaust. After the exhaust is completed, the valve plate will close to close the exhaust port, thereby completing the intake, compression and exhaust process. An exhaust valve seat and an exhaust hole are provided on the cylinder head of the compressor. The exhaust valve plate assembly is fixed on an exhaust valve seat, and is used to close or open the exhaust hole on the exhaust valve seat. The traditional exhaust valve plate assembly is mainly composed of a valve plate, a baffle, a valve seat and a rivet. Figures 1 to 4 As shown, the valve plate 20' is a flexible thin plate structure. In the exhaust stage, the valve plate 20' opens and its lift is limited by the baffle 10'. After the exhaust is completed, the valve plate 20' restores its deformation through its own rigidity. When the compressor is exhausting, the high-pressure gas pushes the valve plate 20' to open through the exhaust hole, causing the valve plate 20' and the baffle 10' to have a high-speed impact. The reciprocating impact between the valve plate 20' and the baffle 10' will cause fatigue fracture of the valve plate 20' and aggravate the noise of the compressor, affecting the reliability of the compressor.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include prior art information that is not known to those skilled in the art. Summary of the invention

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide an exhaust valve plate assembly and a compressor, so as to reduce the impact force on the exhaust valve plate, reduce the probability of fatigue fracture of the exhaust valve plate, and improve the reliability of the compressor operation.

[0006] An embodiment of the present invention provides an exhaust valve plate assembly, which is fixed on an exhaust valve seat and is used to close or open an exhaust hole on the exhaust valve seat. The exhaust valve plate assembly includes a valve plate and a baffle plate provided on a side of the exhaust valve plate away from the exhaust valve seat;

[0007] The baffle includes a first connecting portion, a limiting portion and a buffer portion which are 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 in a direction pointing to the first connecting portion.

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

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

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

[0011] In some embodiments, the thickness of the first connection part and the limiting part is 0.5 mm to 1 mm, and the thickness of the buffer part is 0.5 to 1.5 times the thickness of the first connection part. In some embodiments, the valve sheet includes a second connection part and a third connection part connected in sequence, and a partial structure of the third connection part can block the exhaust hole.

[0012] In some embodiments, the buffer portion has L max and M max , where L max 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, satisfying M max ≦L max ≦1.2M max .

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

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

[0015] In some embodiments, a first through hole is provided on the first connecting portion of the baffle plate, a second through hole is provided 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 plate and the valve plate onto the exhaust valve seat.

[0016] An embodiment of the present invention further provides a compressor, comprising:

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

[0018] The exhaust valve plate assembly as described in any of the above items is connected to the exhaust valve seat and is used to open and close the exhaust hole.

[0019] The exhaust valve plate assembly and the compressor provided by the present invention have the following advantages:

[0020] By adding a buffer portion to the baffle, when the valve plate moves toward the baffle and hits the valve plate, the buffer portion can absorb and dissipate part of the energy generated by the impact, thereby reducing the energy of the baffle acting on the valve plate, that is, reducing the impact force on the valve plate, and reducing the probability of fatigue fracture of the valve plate; further, it can also reduce the vibration generated by the valve plate when the exhaust hole is periodically closed or opened, reduce the noise during compression operation, and improve the comfort and working stability of the compressor; compared with the exhaust valve plate assembly in the prior art, the present invention only adds a buffer portion to the valve plate, the valve plate structure changes little, is easy to manufacture, and increases little cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

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

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

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

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

[0026] Figure 5 A schematic diagram of a baffle and a valve plate provided by an embodiment of the present invention at a first viewing angle is shown;

[0027] Figure 6 A schematic diagram of a baffle and a valve plate provided by an embodiment of the present invention at a second viewing angle is shown;

[0028] Figure 7 A top view of a baffle and a valve plate provided in one embodiment of the present invention is shown;

[0029] Figure 8 A side view of a baffle and a valve plate provided in an embodiment of the present invention is shown.

[0030] Reference numerals:

[0031] 10' Baffles in the prior art

[0032] 20' Valve plate in the prior art

[0033] 10 Baffle in the embodiment of the present invention

[0034] 11 First connection

[0035] 12 Restriction

[0036] 13 Buffer

[0037] 131 First Part

[0038] 132 Second Part

[0039] 20 Valve plate in the embodiment of the present invention

[0040] 21 Second connection

[0041] 22 Third connection DETAILED DESCRIPTION

[0042] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. In the representations of the present application, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner. In addition, the different embodiments or examples represented in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradicting each other.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] It should be further understood that the terms "comprises" and "includes" indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "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". Exceptions to this definition will only occur when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0045] To solve the problems in the background technology, an embodiment of the present invention provides an exhaust valve plate assembly for closing or opening the exhaust hole on the exhaust valve seat, the exhaust valve plate assembly comprising a valve plate and a baffle plate arranged on the side of the exhaust valve plate away from the exhaust valve seat; the baffle plate 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 the side of the limiting portion away from the valve plate, and the buffer portion extends in a direction pointing to the first connecting portion. The technical solution provided by the present invention is to provide a buffer portion on the baffle plate. When the exhaust causes the valve plate to open and hit the baffle plate, the buffer portion absorbs and dissipates a portion of the energy transmitted by the valve plate hitting the baffle plate, thereby reducing the energy of the baffle plate reacting on the valve plate, that is, the impact force on the valve plate is reduced, thereby reducing the probability of fatigue fracture of the valve plate; and the reduced impact force on the valve plate can also reduce the vibration generated by the valve plate when it is repeatedly opened and closed, thereby reducing the noise during operation of the compressor and improving the comfort and working stability of the compressor; compared with the exhaust valve plate assembly in the prior art, the present invention only adds a buffer portion to the valve plate, the valve plate structure changes little, is easy to manufacture, and increases little cost.

[0046] The exhaust valve plate assembly provided by the present invention will be explained in detail below in conjunction with embodiments.

[0047] like Figures 5 to 8 As shown, an embodiment of the present invention provides an exhaust valve plate assembly, which is fixed on the 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 20 and a baffle 10 provided on one side of the valve plate 20 away from the exhaust valve seat (not shown in the figure). 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 compressed high-pressure gas, the baffle 10 will limit the height of the movement of the valve plate 20 after being opened.

[0048] Furthermore, the baffle 10 includes a first connecting portion 11, a limiting portion 12 and a buffer portion 13 which are connected in sequence, the limiting portion 12 is bent in a direction away from the valve plate 20, the buffer portion 13 is arranged on a side of the limiting portion 12 away from the valve plate 20, and the buffer portion 13 extends in a direction pointing to the first connecting portion 11.

[0049] By adding a buffer portion 13 to the baffle 10, when the valve plate 20 moves toward the baffle 10 and hits the valve plate 20, the buffer portion 13 can absorb and dissipate part of the energy generated by the impact, thereby reducing the energy of the baffle 10 reacting on the valve plate 20, that is, reducing the impact force on the valve plate 20, and reducing the probability of fatigue fracture of the valve plate 20; further, it can also reduce the vibration generated by the valve plate 20 when the exhaust hole is periodically closed or opened, reduce the noise during compression operation, and improve the comfort and working stability of the compressor; compared with the exhaust valve plate assembly in the prior art, in the present invention, only the buffer portion 13 is added to the valve plate 20, the structure of the valve plate 20 changes little, it is easy to manufacture, and the production cost of the modified valve plate 20 is low.

[0050] For further information, please refer to Figure 8 , the buffer portion 13 includes a first component 131 extending along a first direction and a second component 132 extending along a second direction. Here, the first direction is the thickness direction of the valve plate 20, and the second direction is the thickness direction perpendicular to the valve plate 20. In the embodiment of the present invention, the cross section of the buffer portion 13 is L-shaped. The buffer portion 13 with an L-shaped cross section can dissipate part of the energy transmitted from the valve plate to the baffle 10 by shaking.

[0051] like Figures 5 to 7 As shown, in some embodiments, the buffer portion 13 includes a quasi-circular structure or a quasi-elliptical structure. Exemplarily, in an embodiment of the present invention, the second component 132 is a tongue reed. The tongue reed is an elastic metal sheet with a shape similar to a tongue (quasi-elliptical structure). When energy is transferred to the tongue reed, the tongue reed will vibrate multiple times to dissipate part of the energy, thereby reducing the impact force of the baffle on the valve plate. The shape of the second component 132 is not limited to the tongue reed shown. Those skilled in the art can change the shape of the second component 132 according to actual needs to meet the requirements of buffering performance.

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

[0053] Furthermore, in the embodiment of the present invention, the curvature of the limiting portion 12 is set to a conventional size in the prior art, so that the valve plate 20 can fit with the baffle 10 in a larger area.

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

[0055] Further, see Figure 7 The dashed line portion shown in FIG. 1 shows a schematic structure of the valve plate 20, and the buffer portion 13 has L max and M max , where L max 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, satisfying 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] Furthermore, if Figures 5 to 7 As shown, a first through hole is provided on the first connecting portion 11 of the baffle 10, and a second through hole is provided on the second connecting portion 21 of the valve plate 20. A bolt can pass through the first through hole and the second through hole to screw the baffle 10 and the valve plate 20 onto the exhaust valve seat.

[0057] Furthermore, if Figure 8 As shown, the first connection part 11 has the same shape as the second connection part 21. The above structural arrangement can make the first connection part 11 and the second connection part 21 fit more closely, and is easy to process and manufacture.

[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 present invention can reduce the impact force on the valve plate 20, a simulation test is performed to compare the impact forces on 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 present invention. The simulation simulates the collision process between the valve plate and the baffle during the exhaust process of the compressor. The valve plate is opened by the pressure difference force and hits the baffle, thereby generating an impact force. Table 1 below shows the impact force on the valve plate 20' in the exhaust valve plate assembly in the prior art when it is opened, and Table 2 below shows the impact force on the valve plate 20' in the exhaust valve plate assembly provided in the embodiment of the present invention when it is opened.

[0059] Table 1 Simulation calculation results of the impact force received by the valve plate 20' when it hits the baffle plate 10' in the prior art and the impact force received by the valve plate 20 when it hits the baffle plate 10 in the embodiment of the present invention

[0060]

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

[0062] The embodiment of the present invention further provides a compressor, comprising a cylinder head and the exhaust valve plate assembly as described above, wherein the cylinder head has an exhaust valve seat and an exhaust hole, and the exhaust valve plate assembly is connected to the exhaust valve seat for opening and closing the exhaust hole. Therefore, the compressor provided by the embodiment of the present invention can achieve all the technical effects of the exhaust valve plate assembly, reduce the impact force of the valve plate when it is periodically opened and closed, reduce the probability of fatigue fracture of the valve plate, reduce the noise generated when the compressor is running, 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 invention have the following advantages:

[0064] By adding a buffer portion to the baffle, when the valve plate moves toward the baffle and hits the valve plate, the buffer portion can absorb and dissipate part of the energy generated by the impact, thereby reducing the energy of the baffle acting on the valve plate, that is, reducing the impact force on the valve plate, and reducing the probability of fatigue fracture of the valve plate; further, it can also reduce the vibration generated by the valve plate when the exhaust hole is periodically closed or opened, reduce the noise during compression operation, and improve the comfort and working stability of the compressor; compared with the exhaust valve plate assembly in the prior art, the present invention only adds a buffer portion to the valve plate, the valve plate structure changes little, is easy to manufacture, and increases little cost.

[0065] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An exhaust valve plate assembly, fixed on an exhaust valve seat, used to close or open the exhaust hole on the exhaust valve seat, characterized in that: The exhaust valve plate assembly includes a valve plate and a baffle plate arranged on the side of the valve plate away from the exhaust valve seat; the baffle plate includes 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 the side of the limiting portion away from the valve plate, and the buffer portion extends in a direction pointing to the first connecting portion.

2. The exhaust valve plate assembly according to claim 1, characterized in that: The buffer portion includes a first component extending along a first direction and a second component extending along a second direction.

3. The exhaust valve plate assembly according to claim 2, characterized in that: The cross section of the buffer portion is L-shaped.

4. The exhaust valve plate assembly according to claim 1, characterized in that: The thickness of the first connecting portion and the limiting portion is 0.5 mm to 1 mm, and the thickness of the buffer portion is 0.5 to 1.5 times the thickness of the first connecting portion.

5. The exhaust valve plate assembly according to claim 2, characterized in that: The valve plate includes a second connection portion and a third connection portion which are connected in sequence, and a partial structure of the third connection portion can block the exhaust hole.

6. The exhaust valve plate assembly according to claim 4, characterized in that: The buffer portion has L max and M max , where L max 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, satisfying M max ≦L max ≦1.2M max .

7. The exhaust valve plate assembly according to claim 6, characterized in that: The buffer portion includes a quasi-circular structure or a quasi-elliptical structure.

8. The exhaust valve plate assembly according to claim 7, characterized in that: The second component is a reed.

9. The exhaust valve plate assembly according to claim 7, characterized in that: A first through hole is provided on the first connecting portion of the baffle plate, a second through hole is provided 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 plate and the valve plate onto the exhaust valve seat.

10. A compressor, characterized in that: include: a cylinder head having an exhaust valve seat and exhaust holes; and The exhaust valve plate assembly according to any one of claims 1 to 9, connected to the exhaust valve seat, is used to open and close the exhaust hole.

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