Cylinder head assembly and compressor with same

Abstract

The utility model provides a cylinder head assembly and a compressor with the same. The cylinder head assembly comprises an exhaust valve plate and a valve plate, an exhaust notch is formed in the exhaust valve plate, the valve plate is connected with the exhaust valve plate, and at least part of the valve plate is arranged in the exhaust notch. The valve plate is arranged on one side of the exhaust valve plate; an exhaust hole is formed in the valve plate; wherein the number of the exhaust holes is at least two, and the at least two exhaust holes are arranged at intervals; the number of the valve plates is at least two, the at least two valve plates and the at least two exhaust holes are arranged in a one-to-one correspondence mode, and each valve plate is arranged opposite to the corresponding exhaust hole. According to the technical scheme provided by the utility model, the technical problem that the impact speed of the exhaust valve plate is too high due to single-hole exhaust in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and in particular, to a cylinder head assembly and a compressor having the same. Background Art

[0002] At present, in the technical field of compressors applicable to refrigerators, the cylinder head assembly plays a decisive role in the performance and refrigerating capacity of the compressor. As Figure 1 shown, the cylinder head assembly of the existing piston compressor mainly consists of a suction valve plate 60, a valve plate 30, an exhaust valve plate 20, a lift limiting member 50, a cylinder head structure 40, etc., and usually adopts a design form of arranging a single exhaust hole 31 on the valve plate 30.

[0003] However, with the improvement of the requirements for the energy efficiency level of compressors, under the operation requirements of compressor broadband and high speed, the existing cylinder head assembly structure can no longer meet the use requirements. When the compressor needs to operate at 80 Hz and above, the single-exhaust-hole valve group has a limited exhaust area, resulting in a relatively large exhaust speed. In this way, the impact speed when the exhaust valve plate 20 strikes the valve port and the lift limiting member 50 is relatively large, and the problem of fracture of the exhaust valve plate 20 is likely to occur, affecting the normal operation of the compressor. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a cylinder head assembly and a compressor having the same, so as to solve the technical problem of excessive impact speed of the exhaust valve plate caused by single-hole exhaust in the prior art.

[0005] To achieve the above purpose, according to one aspect of the utility model, a cylinder head assembly is provided, including:

[0006] An exhaust valve plate and a valve piece, an exhaust groove is arranged on the exhaust valve plate, the valve piece is connected to the exhaust valve plate, and at least part of the valve piece is arranged in the exhaust groove;

[0007] A valve plate, arranged on one side of the exhaust valve plate; an exhaust hole is arranged on the valve plate;

[0008] Wherein, there are at least two exhaust holes, and the at least two exhaust holes are arranged at intervals; there are at least two valve pieces, the at least two valve pieces are arranged in one-to-one correspondence with the at least two exhaust holes, and each valve piece is arranged opposite to the corresponding exhaust hole.

[0009] Furthermore, the cylinder head assembly further includes:

[0010] A cylinder head structure, the cylinder head structure has an exhaust cavity and an exhaust cylinder hole communicating with the exhaust cavity; the exhaust valve plate is located on the side of the valve plate close to the cylinder head structure;

[0011] A lift limiting member, connected to the cylinder head structure and located in the exhaust cavity, the lift limiting member has a limiting surface for being arranged opposite to the valve piece;

[0012] Among them, there are at least two lift limit members. The at least two lift limit members are arranged in one-to-one correspondence with at least two valve plates. The limiting surfaces of the respective lift limit members are used to limit the corresponding valve plates.

[0013] Furthermore, each valve plate has a connection end connected to the exhaust valve plate and a free end located at the exhaust notch; when the valve plate is in the position of closing the corresponding exhaust hole, along the extension direction from the connection end to the free end of each valve plate, the distance between the limiting surface and the valve plate gradually increases; and / or,

[0014] The limiting surfaces of the respective lift limit members are all arc-shaped surfaces; and / or,

[0015] The cylinder head structure and the at least two lift limit members are of an integrally formed structure.

[0016] Furthermore, when the valve plate is in the position of closing the corresponding exhaust hole, the distance between the projection point of the center point of the corresponding exhaust hole on the side of the valve plate close to the lift limit member and the limiting surface of the corresponding lift limit member is H, and the average aperture of the corresponding exhaust hole is D;

[0017] Among them, 0.15 < H / D < 0.25.

[0018] Furthermore, the cylinder head assembly further includes:

[0019] An intake valve plate and a fourth valve plate that are connected to each other. The intake valve plate is arranged on the side of the valve plate away from the exhaust valve plate. Mounting through holes and at least two ventilation holes are arranged at intervals on the intake valve plate. At least part of the fourth valve plate is located in the mounting through holes. The at least two ventilation holes are arranged in one-to-one correspondence with the at least two exhaust holes, and each ventilation hole is arranged opposite to the corresponding exhaust hole.

[0020] Furthermore, the exhaust notch is an axisymmetric structure, and at least two valve plates are symmetrically arranged on the exhaust valve plate along the axis of symmetry of the exhaust notch.

[0021] Furthermore, each valve plate has a covering portion corresponding to the corresponding exhaust hole; each lift limit member has a limiting portion arranged opposite to the corresponding covering portion;

[0022] Among them, the exhaust hole is an axisymmetric hole, and both the covering portion and the limiting portion are axisymmetric structures; when the valve plate is in the position of closing the corresponding exhaust hole, the axis of symmetry of the exhaust hole, the axis of symmetry of the covering portion, and the axis of symmetry of the limiting portion coincide; or,

[0023] The exhaust hole is a centrosymmetric hole, and both the covering portion and the limiting portion are centrosymmetric structures; when the valve plate is in the position of closing the corresponding exhaust hole, the center of symmetry of the exhaust hole, the center of symmetry of the covering portion, and the center of symmetry of the limiting portion coincide.

[0024] Furthermore, the sizes of at least two exhaust holes are different from each other; or;

[0025] The exhaust slot is an axisymmetric structure, and at least two exhaust holes are symmetrically arranged along the axis of symmetry of the exhaust slot; at least two exhaust holes that are symmetrically arranged along the axis of symmetry of the exhaust slot and are respectively located on both sides of the axis of symmetry of the exhaust slot have the same size; or,

[0026] The exhaust slot is an axisymmetric structure, at least two exhaust holes are symmetrically arranged along the axis of symmetry of the exhaust slot, at least two exhaust holes include a first exhaust hole, a second exhaust hole and a third exhaust hole arranged at intervals, the first exhaust hole and the third exhaust hole are respectively located on both sides of the second exhaust hole and are symmetrically arranged with respect to the axis of symmetry of the exhaust slot, the second exhaust hole is symmetrically arranged with respect to the axis of symmetry of the exhaust slot, the first exhaust hole and the third exhaust hole have the same size, and the size of the first exhaust hole is different from the size of the second exhaust hole.

[0027] Furthermore, at least one of the stiffness and natural frequency of at least two valve plates is different; or,

[0028] The exhaust slot is an axisymmetric structure, and at least two valve plates are symmetrically arranged on the exhaust valve plate along the axis of symmetry of the exhaust slot; at least two valve plates that are symmetrically arranged along the axis of symmetry of the exhaust slot and are respectively located on both sides of the axis of symmetry of the exhaust slot have the same stiffness and fixed frequency; or,

[0029] The exhaust slot is an axisymmetric structure, at least two valve plates are symmetrically arranged along the axis of symmetry of the exhaust slot, at least two valve plates include a first valve plate, a second valve plate and a third valve plate arranged at intervals, the first valve plate and the third valve plate are respectively located on both sides of the second valve plate and are symmetrically arranged with respect to the axis of symmetry of the exhaust slot, the second valve plate is symmetrically arranged with respect to the axis of symmetry of the exhaust slot, the first valve plate and the third valve plate have the same stiffness and fixed frequency, and the size of the stiffness and fixed frequency of the first valve plate is different from that of the second valve plate.

[0030] Furthermore, the valve plate has a connecting end and a free end, the connecting end is connected to the exhaust valve plate, and the free end is movably arranged at the exhaust slot; along the direction from the connecting end to the free end, the width of the valve plate gradually increases; and / or,

[0031] The valve plate has a connecting portion and a covering portion connected to each other, one end of the connecting portion away from the covering portion is connected to the exhaust valve plate, the covering portion is arranged opposite to the corresponding exhaust hole, and the covering portion is an arc structure adapted to the outer shape of the exhaust hole.

[0032] Furthermore, the exhaust slot is of an axisymmetric structure, and at least two valve plates are symmetrically arranged along the axis of symmetry of the exhaust slot. The at least two valve plates include a first valve plate, a second valve plate, and a third valve plate that are spaced apart. The first valve plate and the third valve plate are respectively located on both sides of the second valve plate and are symmetrically arranged with respect to the axis of symmetry of the exhaust slot. The second valve plate is symmetrically arranged with respect to the axis of symmetry of the exhaust slot.

[0033] Among them, the first valve plate, the second valve plate, and the third valve plate all extend towards the middle of the exhaust slot; and / or,

[0034] The exhaust slot has a top outer edge, a first side outer edge, a second side outer edge, and a bottom outer edge that are sequentially connected end to end. The connection between the first valve plate and the exhaust valve plate is located at the first side outer edge. The connection between the second valve plate and the exhaust valve plate is located at the top outer edge. The connection between the third valve plate and the exhaust valve plate is located at the second side outer edge.

[0035] According to another aspect of the present invention, a compressor is provided, including the cylinder head assembly provided above.

[0036] Applying the technical solution of the present invention, through the setting of at least two exhaust holes and the corresponding setting of at least two exhaust valve plates, the exhaust area can be increased, the flow velocity of the air flow passing through the exhaust holes can be reduced, and further the impact force on the exhaust valve plate can be reduced, thereby solving the problem of valve plate fracture caused by excessive impact force on the exhaust valve plate and effectively ensuring the reliability of the air valve. Therefore, through the technical solution of the present invention, the technical problem of excessive impact speed of the exhaust valve plate caused by single-hole exhaust in the prior art can be solved. Description of the Drawings

[0037] The specification drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0038] Figure 1 Shows an exploded structural schematic diagram of a cylinder head assembly in the prior art;

[0039] Figure 2 Shows an exploded structural schematic diagram of a cylinder head assembly provided in Embodiment 1 of the present invention;

[0040] Figure 3 Shows a cross-sectional view of a cylinder head assembly provided in Embodiment 1 of the present invention;

[0041] Figure 4 Shows Figure 3 An enlarged structural schematic diagram at I in

[0042] Figure 5A schematic structural diagram of the exhaust valve sheet, valve plate and intake valve sheet of the cylinder head assembly after assembly according to the first embodiment of the utility model is shown;

[0043] Figure 6 A front view of a cylinder head structure of a cylinder head assembly provided according to the first embodiment of the utility model is shown;

[0044] Figure 7 A front view of an exhaust valve plate of a cylinder head assembly provided according to the first embodiment of the utility model is shown;

[0045] Figure 8 A schematic structural diagram of the valve plate and the air intake valve plate of the cylinder head assembly after being assembled according to the first embodiment of the utility model is shown.

[0046] The above drawings include the following reference numerals:

[0047] 10. Exhaust valve plate; 11. Exhaust notch; 111. Top outer edge; 112. First side outer edge; 113. Second side outer edge; 114. Bottom outer edge;

[0048] 20. valve disc; 21. connecting end; 22. free end; 23. covering portion; 24. first valve disc; 25. second valve disc; 26. third valve disc;

[0049] 30, valve plate; 31, exhaust hole; 311, first exhaust hole; 312, second exhaust hole; 313, third exhaust hole; 32, air intake hole;

[0050] 40. Cylinder head structure; 41. Exhaust cavity; 42. Exhaust cylinder hole;

[0051] 50. lift limiter; 51. limit surface; 52. limit part;

[0052] 60. Inhalation valve plate; 61. Mounting through hole; 62. Ventilation hole;

[0053] 70. Fourth valve plate; 71. Shielding portion. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0055] like Figures 2 to 8As shown in the figure, Embodiment 1 of the present utility model provides a cylinder head assembly. The cylinder head assembly includes an exhaust valve plate 10 and a valve plate 20. An exhaust notch 11 is provided on the exhaust valve plate 10. The valve plate 20 is connected to the exhaust valve plate 10, and at least part of the valve plate 20 is disposed within the exhaust notch 11. The cylinder head assembly further includes a valve plate 30, which is disposed on one side of the exhaust valve plate 10; an exhaust hole 31 is provided on the valve plate 30. Among them, there are at least two exhaust holes 31, and the at least two exhaust holes 31 are spaced apart; there are at least two valve plates 20, and the at least two valve plates 20 are arranged in one-to-one correspondence with the at least two exhaust holes 31, and each valve plate 20 is disposed opposite to the corresponding exhaust hole 31.

[0056] By using the cylinder head assembly provided in Embodiment 1 of the present utility model, the exhaust area can be increased through the arrangement of at least two exhaust holes 31 and the corresponding arrangement of at least two valve plates 20, the flow velocity of the air flow passing through the exhaust holes 31 can be reduced, and further the impact force on the valve plate 20 can be reduced, thereby solving the problem of valve plate fracture caused by excessive impact force on the valve plate 20 and effectively ensuring the reliability of the air valve. Therefore, through the cylinder head assembly provided in this embodiment, the technical problem of excessive impact speed of the exhaust valve plate caused by single-hole exhaust in the prior art can be solved.

[0057] Specifically, the valve plate 30 is disposed opposite to and connected to the exhaust valve plate 10. Specifically, the valve plate 30 is fixedly connected to the exhaust valve plate 10. Specifically, the valve plate 20 has a closed position for blocking and closing the exhaust hole 31; and / or, the valve plate 20 has an open position for avoiding the exhaust hole 31. With such a structural arrangement, the exhaust of the compressor can be completed by switching the valve plate 20 between the closed position and the open position, and the exhaust efficiency of the compressor can be adjusted by adjusting the opening and closing efficiency of the valve plate 20, thereby improving and enhancing the exhaust efficiency of the compressor.

[0058] Specifically, the cylinder head assembly further includes a cylinder head structure 40 and a lift limiter 50. The cylinder head structure 40 has an exhaust cavity 41 and an exhaust cylinder hole 42 communicating with the exhaust cavity 41; the exhaust valve plate 10 is located on the side of the valve plate 30 close to the cylinder head structure 40. The lift limiter 50 is connected to the cylinder head structure 40 and is located in the exhaust cavity 41. The lift limiter 50 has a limiting surface 51 for being disposed opposite to the valve plate 20. Among them, there are at least two lift limiters 50, and the at least two lift limiters 50 are arranged in one-to-one correspondence with the at least two valve plates 20. The limiting surface 51 of each lift limiter 50 is used to limit the corresponding valve plate 20. With such a structural arrangement, when the valve plate 20 is switched from the closed position to the open position, the limiting surface 51 of the lift limiter 50 can be used to limit and cooperate with the valve plate 20 to prevent the valve plate 20 from breaking under the impact of the air flow. At the same time, compared with the technical solution of installing the valve plate 20 and the lift limiter 50 on the valve plate, the lift limiter 50 is arranged in the exhaust cavity 41 of the cylinder head structure 40, which can improve the fitting degree between the valve plate 20 and the lift limiter 50, so that when running at high speed, the response frequency of the valve plate 20 is increased, the degree of gas reflux is reduced, and the suction and exhaust efficiency of the compressor is effectively improved.

[0059] Specifically, in order to improve the structural compactness and stability of the cylinder head assembly, the cylinder head structure 40 is disposed opposite to and connected to the exhaust valve plate 10. Specifically, the cylinder head structure 40 is fixedly connected to the exhaust valve plate 10.

[0060] Specifically, the distances between the limiting surfaces 51 of the respective lift limiters 50 and the exhaust hole 31 are different, or the distances between the limiting surfaces 51 of two of the at least two lift limiters 50 and the exhaust hole 31 are the same, or the distances between the limiting surfaces 51 of the respective lift limiters 50 and the exhaust hole 31 are all the same. With such a structural arrangement, by setting the lift limiters 50 with different distances, independent lift control can be achieved in cooperation with the valve plate 20, so as to select the appropriate valve plate 20 to be opened and closed according to different compressor operating frequencies and displacements, thereby further improving the exhaust efficiency.

[0061] In this embodiment, each valve plate 20 has a connection end 21 connected to the exhaust valve plate 10 and a free end 22 located at the exhaust notch 11; when the valve plate 20 is in a position to close the corresponding exhaust hole 31, along the extension direction from the connection end 21 to the free end 22 of each valve plate 20, the distance between the limiting surface 51 and the valve plate 20 gradually increases. Specifically, the free end 22 is movably arranged at the exhaust notch 11. With such a structural arrangement, the position of the limiting surface 51 can be adapted to the position of the valve plate 20 in the open state as much as possible, enabling the valve plate 20 to gradually fit on the surface of the limiting surface 51 during the process of switching from the closed position to the open position, thereby effectively reducing the impact on the valve plate 20 and further improving the service stability of the cylinder head assembly.

[0062] Specifically, the limiting surface 51 of each lift limiting member 50 is an arc surface. With such a structural arrangement, the valve plate 20 can gradually fit on the surface of the limiting surface 51 during the process of switching from the closed position to the open position, thereby effectively reducing the impact on the valve plate 20 and further improving the service stability of the cylinder head assembly.

[0063] Specifically, the cylinder head structure 40 and at least two lift limiting members 50 are of an integrally formed structure. With such a structural arrangement, the number of parts used in the cylinder head assembly can be reduced, and the convenience during assembly can be improved.

[0064] Specifically, as Figure 4 shown, when the valve plate 20 is in a position to close the corresponding exhaust hole 31, the distance between the projection point of the center point of the corresponding exhaust hole 31 on the side of the valve plate 20 close to the lift limiting member 50 and the limiting surface 51 of the corresponding lift limiting member 50 is H, and the average aperture of the corresponding exhaust hole 31 is D. Among them, 0.15 < H / D < 0.25. With such a structural arrangement, it can ensure the opening effectiveness and reliability of the valve plate 20 when switching from the closed position to the open position for the exhaust hole 31 with an average aperture of D, thereby improving the application efficiency of the lift limiting member 50 and improving the problems of delayed closing of the valve plate 20 and gas backflow.

[0065] Specifically, the exhaust hole 31 is a round hole with an aperture of D, and 0.15 < H / D < 0.25. With such a structural arrangement, it can ensure the opening effectiveness and reliability of the valve plate 20 when switching from the closed position to the open position for the exhaust hole 31 with an aperture of D, thereby improving the application efficiency of the lift limiting member 50 and improving the problems of delayed closing of the valve plate 20 and gas backflow.

[0066] In this embodiment, the cylinder head assembly further includes an intake valve plate 60 and a fourth valve plate 70 which are connected to each other. The intake valve plate 60 is arranged on the side of the valve plate 30 away from the exhaust valve plate 10. Mounting through holes 61 and at least two ventilation holes 62 are arranged at intervals on the intake valve plate 60. At least part of the fourth valve plate 70 is located in the mounting through hole 61. The at least two ventilation holes 62 and the at least two exhaust holes 31 are arranged in one-to-one correspondence, and each ventilation hole 62 is arranged opposite to the corresponding exhaust hole 31. With such a structural arrangement, the intake process of the cylinder head assembly can be completed by the fourth valve plate 70 arranged on the intake valve plate 60. At the same time, due to the relative and corresponding arrangement of the ventilation holes 62 and the exhaust holes 31, the gas can flow normally in the exhaust holes 31 without being interfered by the intake valve plate 60.

[0067] Specifically, there are at least two fourth valve plates 70, and the at least two fourth valve plates 70 are arranged at intervals in the mounting through hole 61. At least two intake holes 32 are arranged on the valve plate 30. The at least two intake holes 32 and the at least two fourth valve plates 70 are arranged in one-to-one correspondence. Specifically, the fourth valve plate 70 has a shielding portion 71, and the shielding portion 71 is used to be arranged opposite to the intake hole 32. With such a structural arrangement, the intake area can be increased through the corresponding arrangement of the at least two fourth valve plates 70 and the at least two intake holes 32, and the intake efficiency of the compressor can be further improved.

[0068] Specifically, in order to improve the structural compactness and stability of the cylinder head assembly, the intake valve plate 60 and the valve plate 30 are arranged opposite to each other and connected to each other. Specifically, the intake valve plate 60 and the valve plate 30 are fixedly connected.

[0069] In this embodiment, the exhaust slot 11 has an axisymmetric structure, and at least two valve plates 20 are arranged symmetrically on the exhaust valve plate 10 along the axis of symmetry of the exhaust slot 11. With such a structural arrangement, the structural layout of the exhaust valve plate 10 and the valve plates 20 can be optimized, so that the positions of the valve plates 20 can be better arranged within the limited area of the exhaust slot 11, ensuring that the valve plates 20 are independent of each other without interference, and at the same time ensuring the layout compactness of the valve plates 20.

[0070] Specifically, each valve plate 20 has a covering portion 23 corresponding to the corresponding exhaust hole 31; each lift limiter 50 has a limiting portion 52 disposed opposite to the corresponding covering portion 23. Among them, the exhaust hole 31 is an axisymmetric hole, and both the covering portion 23 and the limiting portion 52 are axisymmetric structures; when the valve plate 20 is in the position of closing the corresponding exhaust hole 31, the axis of symmetry of the exhaust hole 31, the axis of symmetry of the covering portion 23, and the axis of symmetry of the limiting portion 52 coincide. With such a structural arrangement, when the valve plate 20 is in the position of closing the corresponding exhaust hole 31, the covering effect of the covering portion 23 on the exhaust hole 31 can be effectively ensured; when the valve plate 20 is in the position of opening the corresponding exhaust hole 31, the limiting effect of the lift limiter 50 on the valve plate 20 can be effectively ensured.

[0071] Specifically, "the axis of symmetry of the exhaust hole 31, the axis of symmetry of the covering portion 23, and the axis of symmetry of the limiting portion 52 coincide" means that the axis of symmetry of the exhaust hole 31, the axis of symmetry of the covering portion 23, and the axis of symmetry of the limiting portion 52 are parallel to each other and in the same plane. Among them, the plane where the axis of symmetry of the exhaust hole 31, the axis of symmetry of the covering portion 23, and the axis of symmetry of the limiting portion 52 are located is perpendicular to the plane where the exhaust valve plate 10 is located.

[0072] Specifically, each valve plate 20 has a covering portion 23 corresponding to the corresponding exhaust hole 31; each lift limiter 50 has a limiting portion 52 disposed opposite to the corresponding covering portion 23. Among them, the exhaust hole 31 is a centrosymmetric hole, and both the covering portion 23 and the limiting portion 52 are centrosymmetric structures; when the valve plate 20 is in the position of closing the corresponding exhaust hole 31, the center of symmetry of the exhaust hole 31, the center of symmetry of the covering portion 23, and the center of symmetry of the limiting portion 52 coincide. With such a structural arrangement, when the valve plate 20 is in the position of closing the corresponding exhaust hole 31, the covering effect of the covering portion 23 on the exhaust hole 31 can be effectively ensured; when the valve plate 20 is in the position of opening the corresponding exhaust hole 31, the limiting effect of the lift limiter 50 on the valve plate 20 can be effectively ensured.

[0073] Specifically, "the center of symmetry of the exhaust hole 31, the center of symmetry of the covering portion 23, and the center of symmetry of the limiting portion 52 coincide" means that the center of symmetry of the exhaust hole 31, the center of symmetry of the covering portion 23, and the center of symmetry of the limiting portion 52 are on the same straight line, and this straight line is perpendicular to the plane where the exhaust valve plate 10 is located.

[0074] Specifically, the exhaust hole 31, the covering portion 23, and the limiting portion 52 are all circular. When the valve plate 20 is in the position of closing the corresponding exhaust hole 31, the center of the circle of the exhaust hole 31, the center of the circle of the covering portion 23, and the center of the circle of the limiting portion 52 coincide.

[0075] In this embodiment, the sizes of at least two exhaust holes 31 are different from each other. In this way, according to specific requirements, exhaust holes 31 with different sizes and areas can be selected as the exhaust channels to adapt to different operating frequencies of the compressor, thereby further improving the exhaust efficiency.

[0076] Specifically, the exhaust notch 11 is an axisymmetric structure, and at least two exhaust holes 31 are symmetrically arranged along the axis of symmetry of the exhaust notch 11; at least two exhaust holes 31 that are symmetrically arranged along the axis of symmetry of the exhaust notch 11 and are located on both sides of the axis of symmetry of the exhaust notch 11 have the same size. With such a structural arrangement, the common application of exhaust holes 31 with the same size can increase the area of gas flow, reduce the flow velocity of the gas flow when passing through the exhaust holes 31, and further reduce the impact force on the valve plate 20, thereby reducing the problem of the valve plate 20 breaking due to excessive impact force and effectively ensuring the reliability of the air valve. The symmetric arrangement better optimizes the structural layout of the exhaust holes 31.

[0077] Specifically, the exhaust notch 11 is an axisymmetric structure, at least two exhaust holes 31 are symmetrically arranged along the axis of symmetry of the exhaust notch 11, at least two exhaust holes 31 include a first exhaust hole 311, a second exhaust hole 312, and a third exhaust hole 313 that are arranged at intervals, the first exhaust hole 311 and the third exhaust hole 313 are respectively located on both sides of the second exhaust hole 312 and are symmetrically arranged with respect to the axis of symmetry of the exhaust notch 11, the second exhaust hole 312 is symmetrically arranged with respect to the axis of symmetry of the exhaust notch 11, the first exhaust hole 311 and the third exhaust hole 313 have the same size, and the size of the first exhaust hole 311 is different from the size of the second exhaust hole 312. In this way, two of the three exhaust holes 31 have the same size, and the size of the other exhaust hole 31 is different from the other two exhaust holes 31. With such an arrangement, the exhaust area can be adjusted by independently using one of the three exhaust holes 31 or by combining two or three of the three exhaust holes 31, so that appropriate exhaust holes 31 can be selected according to different displacements and different operating frequencies of the compressor, further improving the exhaust efficiency. The symmetric arrangement layout can optimize the structural layout of the valve plate 30 and the exhaust holes 31, enabling the positions of the exhaust holes 31 to be better arranged within a limited area, ensuring that the exhaust holes 31 are independent of each other without interference, and at the same time ensuring the compactness of the layout of each exhaust hole 31.

[0078] In this embodiment, at least one of the stiffness and natural frequency of at least two valve plates 20 is different. With such a structural arrangement, valve plates 20 with different stiffnesses or natural frequencies can be selected for independent opening and closing according to specific usage requirements to adapt to different operating frequencies of the compressor, thereby further improving the exhaust efficiency.

[0079] Specifically, the exhaust slot 11 has an axisymmetric structure, and at least two valve plates 20 are symmetrically arranged on the exhaust valve plate 10 along the axis of symmetry of the exhaust slot 11; at least two valve plates 20 that are symmetrically arranged along the axis of symmetry of the exhaust slot 11 and are located on both sides of the axis of symmetry of the exhaust slot 11 have the same stiffness and natural frequency. With such a structural arrangement, it is possible to ensure sufficient exhaust area and efficiency through the combined application of valve plates 20 with the same stiffness and natural frequency, effectively reducing the impact force on each valve plate 20, thereby improving the applicability and reliability of the valve plate.

[0080] Specifically, the exhaust slot 11 has an axisymmetric structure, and at least two valve plates 20 are symmetrically arranged along the axis of symmetry of the exhaust slot 11. The at least two valve plates 20 include a first valve plate 24, a second valve plate 25, and a third valve plate 26 that are arranged at intervals. The first valve plate 24 and the third valve plate 26 are respectively located on both sides of the second valve plate 25 and are symmetrically arranged with respect to the axis of symmetry of the exhaust slot 11. The second valve plate 25 is symmetrically arranged with respect to the axis of symmetry of the exhaust slot 11. The first valve plate 24 and the third valve plate 26 have the same stiffness and natural frequency, and the magnitudes of the stiffness and natural frequency of the first valve plate 24 are different from those of the second valve plate 25. In this way, two of the three valve plates 20 have the same stiffness and natural frequency, and the stiffness and natural frequency of the other valve plate 20 are different from those of the other two. Through such an arrangement, it is possible to adjust the exhaust area by independently using one of the three valve plates 20 or by combining two or three of the three valve plates 20, so that appropriate valve plates 20 can be selected according to the different displacements and operating frequencies of the compressor, further improving the exhaust efficiency. The symmetric arrangement can optimize the structural layout of the exhaust valve plate 10 and the valve plates 20, enabling better arrangement of the positions of the valve plates 20 within the limited area of the exhaust slot 11, ensuring that each valve plate 20 is independent and does not interfere with each other, and at the same time ensuring the compactness of the layout of each valve plate 20.

[0081] Specifically, the valve plate 20 has a connecting end 21 and a free end 22. The connecting end 21 is connected to the exhaust valve plate 10, and the free end 22 is movably arranged at the exhaust slot 11; along the direction from the connecting end 21 to the free end 22, the width of the valve plate 20 gradually increases. With such a structural arrangement, during the movement of the free end 22 of the valve plate 20, that is, during the opening process of the valve plate 20, the stiffness of the valve plate 20 gradually increases and gradually fits with the limiting surface 51 of the corresponding lift limiting member 50, which can improve the response speed of the valve plate 20 and improve the problems of delayed closing and gas backflow of the valve plate 20.

[0082] Specifically, the valve plate 20 has a connecting portion and a covering portion 23 which are connected to each other. One end of the connecting portion away from the covering portion 23 is connected to the exhaust valve plate 10. The covering portion 23 is disposed opposite to the corresponding exhaust hole 31, and the covering portion 23 is an arc structure adapted to the outer shape of the exhaust hole 31. With such a structural arrangement, when the valve plate 20 is in a position to close the corresponding exhaust hole 31, the covering effect of the covering portion 23 on the exhaust hole 31 can be effectively ensured, thereby improving the problem of gas backflow.

[0083] Specifically, the exhaust slot 11 is an axisymmetric structure, and at least two valve plates 20 are symmetrically arranged along the axis of symmetry of the exhaust slot 11. The at least two valve plates 20 include a first valve plate 24, a second valve plate 25, and a third valve plate 26 which are arranged at intervals. The first valve plate 24 and the third valve plate 26 are respectively located on both sides of the second valve plate 25 and are symmetrically arranged with respect to the axis of symmetry of the exhaust slot 11. The second valve plate 25 is symmetrically arranged with respect to the axis of symmetry of the exhaust slot 11. Among them, the first valve plate 24, the second valve plate 25, and the third valve plate 26 all extend towards the middle of the exhaust slot 11. With such a structural arrangement, the structural layout of the exhaust valve plate 10 and the valve plate 20 can be optimized, so that the position of the valve plate 20 can be better arranged within the limited area of the exhaust slot 11, ensuring that the valve plates 20 are independent of each other without interference, and at the same time, the layout compactness of the valve plates 20 can also be ensured.

[0084] Specifically, the covering portions 23 of the first valve plate 24, the covering portion 23 of the second valve plate 25, and the covering portion 23 of the third valve plate 26 are all arranged towards the middle of the exhaust slot 11. In this way, it is convenient to make the layout of the exhaust holes 31 corresponding to and opposite to the covering portion 23 more compact and concentrated, thereby further improving the exhaust efficiency.

[0085] In this embodiment, the exhaust slot 11 has an axisymmetric structure, and at least two valve plates 20 are symmetrically arranged along the axis of symmetry of the exhaust slot 11. The at least two valve plates 20 include a first valve plate 24, a second valve plate 25, and a third valve plate 26 that are spaced apart. The first valve plate 24 and the third valve plate 26 are respectively located on both sides of the second valve plate 25 and are symmetrically arranged with respect to the axis of symmetry of the exhaust slot 11. The second valve plate 25 is symmetrically arranged with respect to the axis of symmetry of the exhaust slot 11. Among them, the exhaust slot 11 has a top outer edge 111, a first side outer edge 112, a second side outer edge 113, and a bottom outer edge 114 that are connected end to end in sequence. The connection between the first valve plate 24 and the exhaust valve plate 10 is located at the first side outer edge 112, the connection between the second valve plate 25 and the exhaust valve plate 10 is located at the top outer edge 111, and the connection between the third valve plate 26 and the exhaust valve plate 10 is located at the second side outer edge 113. With such a structural arrangement, the structural layout of the exhaust valve plate 10 and the valve plates 20 can be optimized, so that the positions of the valve plates 20 can be better arranged within the limited area of the exhaust slot 11, ensuring that the valve plates 20 are independent of each other and do not interfere, and at the same time ensuring the compactness of the layout of the valve plates 20.

[0086] Specifically, the first valve plate 24, the second valve plate 25, and the third valve plate 26 can all be independently controlled, so as to select different valve plates 20 according to different compressor operating frequencies and displacements, thereby improving the exhaust efficiency of the compressor.

[0087] Embodiment 2 of the present utility model provides a compressor, which includes the cylinder head assembly provided above. By using the compressor provided in Embodiment 2 of the present utility model, the exhaust area can be increased through the arrangement of at least two exhaust holes 31 and the corresponding arrangement of at least two valve plates 20, the flow velocity of the air flow passing through the exhaust holes 31 can be reduced, and further the impact force on the valve plates 20 can be reduced, thereby reducing the problem of valve plate fracture caused by excessive impact force on the valve plates 20, and effectively ensuring the reliability of the air valve. Therefore, through the compressor provided in this embodiment, the technical problem of excessive impact speed of the exhaust valve plate caused by single-hole exhaust in the prior art can be solved.

[0088] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: The integrated design of the cylinder head and the lift limiter, when the exhaust valve opens, it fits on the limiting piece in the continuously curved cylinder head, reducing the exhaust impact stress and improving the reliability of the valve plate. The three-hole exhaust valve realizes independent control of the stiffness and lift of the three exhaust valve plates. The three-hole exhaust valve plate is designed with a fan-shaped structure with gradually increasing waist width, which cooperates with the continuously curved limiting piece structure. The stiffness of the valve plate gradually increases during the opening process, improving the response speed, improving the high-frequency backflow, and improving the suction and exhaust efficiency of the compressor.

[0089] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0091] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0092] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0093] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0094] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cylinder head assembly, characterized in that: include: An exhaust valve plate (10) and a valve plate (20), wherein the exhaust valve plate (10) is provided with an exhaust notch (11), the valve plate (20) is connected to the exhaust valve plate (10), and at least a portion of the valve plate (20) is arranged in the exhaust notch (11); A valve plate (30) is arranged on one side of the exhaust valve plate (10); an exhaust hole (31) is arranged on the valve plate (30); There are at least two exhaust holes (31), and at least two exhaust holes (31) are arranged at intervals; there are at least two valve sheets (20), and at least two valve sheets (20) are arranged in a one-to-one correspondence with at least two exhaust holes (31), and each valve sheet (20) is arranged opposite to the corresponding exhaust hole (31).

2. The cylinder head assembly according to claim 1, characterized in that: The cylinder head assembly also includes: A cylinder head structure (40), the cylinder head structure (40) comprising an exhaust cavity (41) and an exhaust cylinder hole (42) connected to the exhaust cavity (41); the exhaust valve sheet (10) is located on a side of the valve plate (30) close to the cylinder head structure (40); A lift limiter (50) connected to the cylinder head structure (40) and located in the exhaust chamber (41), wherein the lift limiter (50) has a limiter surface (51) for being arranged opposite to the valve plate (20); There are at least two lift limit members (50), and at least two lift limit members (50) are arranged in one-to-one correspondence with at least two valve plates (20), and the limiting surface (51) of each lift limit member (50) is used to limit the corresponding valve plate (20).

3. The cylinder head assembly according to claim 2, characterized in that: Each valve plate (20) comprises a connection end (21) connected to the exhaust valve plate (10) and a free end (22) located at the exhaust notch (11); when the valve plate (20) is in a position for closing the corresponding exhaust hole (31), along the extension direction from the connection end (21) of each valve plate (20) to the free end (22), the distance between the limiting surface (51) and the valve plate (20) gradually increases; and / or, The limiting surfaces (51) of each of the lift limiting members (50) are arc-shaped surfaces; and / or, The cylinder head structure (40) and at least two lift limiters (50) are integrally formed structures.

4. The cylinder head assembly according to claim 2, characterized in that: When the valve plate (20) is in a position to close the corresponding exhaust hole (31), the distance between the projection point of the center point of the corresponding exhaust hole (31) on the side of the valve plate (20) close to the lift limiter (50) and the limit surface (51) of the corresponding lift limiter (50) is H, and the average aperture of the corresponding exhaust hole (31) is D; Among them, 0.15 <H / D<0.25。 5. The cylinder head assembly according to claim 1, characterized in that: The cylinder head assembly also includes: An intake valve plate (60) and a fourth valve plate (70) are connected to each other, wherein the intake valve plate (60) is arranged on a side of the valve plate (30) away from the exhaust valve plate (10), and a mounting through hole (61) and at least two ventilation holes (62) are arranged at intervals on the intake valve plate (60), and at least a portion of the fourth valve plate (70) is located in the mounting through hole (61), and at least two ventilation holes (62) and at least two exhaust holes (31) are arranged in a one-to-one correspondence, and each ventilation hole (62) is arranged opposite to the corresponding exhaust hole (31).

6. The cylinder head assembly according to claim 1, characterized in that: The exhaust notch (11) is an axisymmetric structure, and at least two valve plates (20) are symmetrically arranged on the exhaust valve plate (10) along the axis of symmetry of the exhaust notch (11).

7. The cylinder head assembly according to claim 2, characterized in that: Each of the valve plates (20) has a covering portion (23) corresponding to the corresponding exhaust hole (31); each of the lift limiter (50) has a limiting portion (52) arranged relative to the corresponding covering portion (23); Wherein, the exhaust hole (31) is an axisymmetric hole, and the covering portion (23) and the limiting portion (52) are both axisymmetric structures; when the valve plate (20) is in a position to close the corresponding exhaust hole (31), the symmetry axis of the exhaust hole (31), the symmetry axis of the covering portion (23) and the symmetry axis of the limiting portion (52) coincide with each other; or, The exhaust hole (31) is a centrally symmetrical hole, and the covering portion (23) and the limiting portion (52) are both centrally symmetrical structures; when the valve plate (20) is in a position to close the corresponding exhaust hole (31), the symmetry center of the exhaust hole (31), the symmetry center of the covering portion (23) and the symmetry center of the limiting portion (52) coincide with each other.

8. The cylinder head assembly according to claim 1, characterized in that: At least two of the exhaust holes (31) have different sizes; or; The exhaust notch (11) is an axisymmetric structure, and at least two exhaust holes (31) are symmetrically arranged along the symmetry axis of the exhaust notch (11); at least two exhaust holes (31) symmetrically arranged along the symmetry axis of the exhaust notch (11) and respectively located on both sides of the symmetry axis of the exhaust notch (11) have the same size; or, The exhaust notch (11) is an axisymmetric structure, at least two exhaust holes (31) are symmetrically arranged along the symmetry axis of the exhaust notch (11), at least two exhaust holes (31) include a first exhaust hole (311), a second exhaust hole (312) and a third exhaust hole (313) which are arranged at intervals, the first exhaust hole (311) and the third exhaust hole (313) are respectively located on both sides of the second exhaust hole (312) and are symmetrically arranged relative to the symmetry axis of the exhaust notch (11), the second exhaust hole (312) is symmetrically arranged relative to the symmetry axis of the exhaust notch (11), the first exhaust hole (311) and the third exhaust hole (313) are of the same size, and the size of the first exhaust hole (311) is different from that of the second exhaust hole (312).

9. The cylinder head assembly according to claim 1, characterized in that: At least one of the stiffness and the natural frequency of at least two of the valve plates (20) is different; or, The exhaust notch (11) is an axisymmetric structure, and at least two valve plates (20) are symmetrically arranged on the exhaust valve plate (10) along the symmetry axis of the exhaust notch (11); the stiffness and fixed frequency of at least two valve plates (20) symmetrically arranged along the symmetry axis of the exhaust notch (11) and respectively located on both sides of the symmetry axis of the exhaust notch (11) are the same; or, The exhaust slot (11) is an axisymmetric structure, at least two of the valve plates (20) are symmetrically arranged along the symmetry axis of the exhaust slot (11), at least two of the valve plates (20) include a first valve plate (24), a second valve plate (25) and a third valve plate (26) which are arranged at intervals, the first valve plate (24) and the third valve plate (26) are respectively located on both sides of the second valve plate (25) and are symmetrically arranged relative to the symmetry axis of the exhaust slot (11), the second valve plate (25) is symmetrically arranged relative to the symmetry axis of the exhaust slot (11), the first valve plate (24) and the third valve plate (26) have the same stiffness and fixed frequency, and the stiffness and fixed frequency of the first valve plate (24) are different from the stiffness and fixed frequency of the second valve plate (25).

10. The cylinder head assembly according to claim 1, characterized in that: The valve plate (20) comprises a connecting end (21) and a free end (22), wherein the connecting end (21) is connected to the exhaust valve plate (10), and the free end (22) is movably arranged at the exhaust notch (11); along the direction from the connecting end (21) to the free end (22), the width of the valve plate (20) gradually increases; and / or, The valve plate (20) comprises a connecting portion and a covering portion (23) which are connected to each other, wherein one end of the connecting portion away from the covering portion (23) is connected to the exhaust valve plate (10), and the covering portion (23) is arranged opposite to the corresponding exhaust hole (31), and the covering portion (23) is an arc structure adapted to the outer shape of the exhaust hole (31).

11. The cylinder head assembly according to claim 1, characterized in that: The exhaust slot (11) is an axisymmetric structure, at least two of the valve plates (20) are symmetrically arranged along the symmetry axis of the exhaust slot (11), and at least two of the valve plates (20) include a first valve plate (24), a second valve plate (25) and a third valve plate (26) arranged at intervals, the first valve plate (24) and the third valve plate (26) are respectively located on both sides of the second valve plate (25) and are symmetrically arranged relative to the symmetry axis of the exhaust slot (11), and the second valve plate (25) is symmetrically arranged relative to the symmetry axis of the exhaust slot (11); Wherein, the first valve plate (24), the second valve plate (25) and the third valve plate (26) all extend toward the middle of the exhaust notch (11); and / or, The exhaust notch (11) comprises a top outer edge (111), a first side outer edge (112), a second side outer edge (113) and a bottom outer edge (114) which are connected end to end in sequence; a connection point between the first valve plate (24) and the exhaust valve plate (10) is located at the first side outer edge (112); a connection point between the second valve plate (25) and the exhaust valve plate (10) is located at the top outer edge (111); and a connection point between the third valve plate (26) and the exhaust valve plate (10) is located at the second side outer edge (113).

12. A compressor, characterized in that: A cylinder head assembly comprising any one of claims 1 to 11.

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