Cylinder head assembly for air compressor and air compressor

Abstract

The utility model relates to the technical field of air compression, and particularly discloses a cylinder head assembly of an air compressor and the air compressor. The cylinder head assembly comprises a cylinder cover and a valve seat which are matched with each other, and an air inlet cavity, an exhaust cavity and a flow path which are formed between the cylinder cover and the valve seat; the valve seat is provided with an air inlet hole and an unloading hole which are communicated with the air inlet cavity and the outside of the cylinder head assembly, and an exhaust hole which is communicated with the exhaust cavity and the outside of the cylinder head assembly; the cylinder head assembly further comprises a first valve used for preventing air from entering the air inlet cavity from the outside of the cylinder head assembly through the air inlet hole, a second valve used for preventing air from flowing out of the air exhaust cavity to the outside of the cylinder head assembly through the air exhaust hole, and an unloading structure used for closing and opening the unloading hole. At least part of air inlet cavities, at least part of exhaust cavities and at least part of flow paths are formed in the cylinder cover and the valve seat. The structure of the cylinder head assembly is simplified, and heat dissipation of the cylinder head assembly is better facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to air compression technical field especially relates to a cylinder head subassembly and air compressor for air compressor. BACKGROUND

[0002] The power required by the brake, clutch power, gear shifting power and other systems of commercial vehicles is provided by the compressed air output by the air compressor. The air compressor generally comprises a cylinder head subassembly, a cylinder body, a cylinder body piston and other components. The cylinder head subassembly is provided with an unloading structure to help the air compressor save energy. However, in the cylinder body subassembly of the existing air compressor, the intake cavity, the exhaust cavity and the flow path are only arranged on the cylinder head cover. The cylinder head cover structure is complex and difficult to manufacture. Moreover, the design of the flow path makes it impossible for the cooling liquid to effectively take away the heat on the cylinder head subassembly. SUMMARY

[0003] The utility model discloses a kind of cylinder head subassemblies and air compressors for air compressor with more simple structure and better heat dissipation performance.

[0004] To achieve the above object, the utility model provides a kind of cylinder head subassembly for air compressor, including cooperation and cylinder head and valve seat, intake cavity, exhaust cavity, flow path formed between the cylinder head and the valve seat;

[0005] The valve seat is provided with intake hole and unloading hole, which are communicated with the intake cavity and the outside of the cylinder head subassembly, and exhaust hole, which is communicated with the exhaust cavity and the outside of the cylinder head subassembly, the cylinder head subassembly further includes first valve piece for preventing air from entering the intake cavity from the outside of the cylinder head subassembly through the intake hole, second valve piece for preventing air from flowing out from the exhaust cavity to the outside of the cylinder head subassembly through the exhaust hole, and unloading structure for closing and opening the unloading hole;

[0006] The cylinder head and the valve seat are both formed with at least part of the intake cavity, at least part of the exhaust cavity and at least part of the flow path.

[0007] As a further improvement of the utility model, the unloading structure includes a valve core, a piston formed on the valve core, a piston cavity formed in the cylinder head and matched with the piston, and a gas path formed in the cylinder head and communicated with the outside of the cylinder head subassembly and the piston cavity;

[0008] The gas path is used for introducing compressed gas into the piston cavity to control the position of the piston in the piston cavity, one end of the valve core extends into the intake cavity, and includes a first position for closing the unloading hole and a second position for moving away from the unloading hole after the first position, and the cylinder head is provided with a perforation for the valve core to extend from the piston cavity into the intake cavity.

[0009] As a further improvement of the utility model, the cylinder cover includes a cover body, a cover plate connected to the cover body, the piston cavity is formed by the cover body and the cover plate, the cover plate is located on the side of the piston cavity away from the unloading hole and closes the piston cavity, the piston divides the piston cavity into a first air cavity close to the unloading hole and a second air cavity away from the unloading hole, and the gas path is connected to the outside of the cylinder head assembly and the first air cavity.

[0010] The unloading structure further includes an elastic structure arranged between the cover plate and the valve core, and two ends of the elastic structure in the elastic extension and contraction direction abut against the valve core and the cover plate respectively.

[0011] As a further improvement of the utility model, two groups of the air inlet holes, two groups of the air outlet holes and two unloading holes are arranged on the valve seat, two unloading structures are arranged to correspond to the two unloading holes respectively, and two cover plates are arranged to close the piston cavities on the two unloading structures respectively.

[0012] As a further improvement of the utility model, the flow path is arranged around the air inlet cavity and the air outlet cavity.

[0013] As a further improvement of the utility model, the air inlet cavity includes a cylinder cover air inlet cavity and a valve seat air inlet cavity formed in the cylinder cover and the valve seat respectively, the air outlet cavity includes a cylinder cover air outlet cavity and a valve seat air outlet cavity formed in the cylinder cover and the valve seat respectively, and the flow path includes a cylinder cover flow path and a valve seat flow path formed in the cylinder cover and the valve seat respectively.

[0014] The cylinder head assembly further includes a partition plate arranged between the cylinder cover and the valve seat, and a plurality of communication holes are arranged on the partition plate to communicate the cylinder cover air inlet cavity and the valve seat air inlet cavity, the cylinder cover air outlet cavity and the valve seat air outlet cavity and the cylinder cover flow path and the valve seat flow path.

[0015] As a further improvement of the utility model, a plurality of cylinder cover flow paths and a plurality of valve seat flow paths are arranged, the plurality of cylinder cover flow paths are communicated through at least one valve seat flow path, and the plurality of valve seat flow paths are communicated through at least one cylinder cover flow path.

[0016] As a further improvement of the utility model, the first valve piece is a first flexible valve plate connected to the valve seat and covering one end of the air inlet hole away from the air inlet cavity, and the second valve piece is a second flexible valve plate connected to the valve seat and covering one end of the air outlet hole close to the air outlet cavity.

[0017] As a further improvement of the utility model, the cylinder cover and the valve seat are both made of aluminum alloy material.

[0018] The utility model also provides an air compressor, the air compressor includes the cylinder head subassembly.

[0019] Beneficial effects:

[0020] The cylinder head subassembly and the air compressor have the beneficial effects that unloading can be carried out to save energy, the air inlet cavity, the air outlet cavity and the flow path are jointly formed by the cylinder cover and the valve seat, the structure of the cylinder head subassembly is simplified, and heat dissipation of the cylinder head subassembly is more facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A three-dimensional structural schematic view of the air compressor is provided for an embodiment of the utility model;

[0022] Figure 2 An exploded schematic view of the cylinder head subassembly in the air compressor is provided for Figure 1

[0023] Figure 3 A bottom view of the cylinder cover in the air compressor is provided for Figure 2

[0024] Figure 4 A top view of the valve seat and the second valve piece in the air compressor is provided for Figure 2

[0025] Figure 5 An exploded schematic view of part of the structure of the cylinder head subassembly in the air compressor is provided for Figure 1

[0026] Figure 6 A schematic view of the internal section of the air compressor in the air compressor is provided for Figure 1

[0027] Figure 7 An exploded schematic view of another part of the structure of the cylinder head subassembly in the air compressor is provided for Figure 1

[0028] Figure 8 A sectional view of part of the unloading structure in the air compressor is provided for Figure 6

[0029] Figure 9 A sectional view of part of the structure of the cylinder head subassembly in the air compressor is provided for Figure 1

[0030] In the drawings:

[0031] 100, air compressor;

[0032] 10, cylinder head subassembly;

[0033] 1, cylinder cover; 11, air inlet; 12, air outlet; 13, air path; 14, air vent; 15, plug; 16, cover body; 17, cover plate; 18, liquid inlet; 19, liquid outlet; ​​​​​​​​

[0034] 2, valve seat; 21, intake hole; 22, unloading hole; 23, exhaust hole;

[0035] 3, intake cavity; 31, cylinder head intake cavity; 32, valve seat intake cavity;

[0036] 4, exhaust cavity; 41, cylinder head exhaust cavity; 42, valve seat exhaust cavity;

[0037] 5, flow path; 51, cylinder head flow path; 51a, first cylinder head flow path; 51b, second cylinder head flow path; 51c, third cylinder head flow path; 52, valve seat flow path; 52a, first valve seat flow path; 52b, second valve seat flow path; 53c, third valve seat flow path.

[0038] 6, first valve member;

[0039] 7, second valve member;

[0040] 8, unloading structure; 81, valve core; 811, accommodating cavity; 82, piston; 83, piston cavity; 831, first gas cavity; 832, second gas cavity; 84, elastic structure; 841, abutting block; 842, compression spring; 843, positioning column;

[0041] 9, partition plate; 91, first sealing gasket; 92, second sealing gasket;

[0042] 20, cylinder body; 201, cylinder body piston cavity; 202, cylinder body piston;

[0043] 30, driving member. DETAILED DESCRIPTION

[0044] The utility model will be described in detail below in combination with the embodiment shown in the drawings. However, the embodiment does not limit the utility model, and the changes in mechanism, method or function made by those skilled in the art based on the embodiment are all included in the protection scope of the utility model.

[0045] The terms for indicating spatial relative positions used herein, such as "upper", "lower", "left", "right", "front", "back", etc., are used for the purpose of convenience of description to describe the relationship of one feature relative to another feature as shown in the drawings. It can be understood that the terms for indicating spatial relative positions can be intended to include different orientations other than the orientation shown in the drawings, and should not be understood as limiting the claims. In addition, the description word "horizontal" used herein is not completely equivalent to along the direction perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0046] As Figures 1-9 shown, the utility model provides a kind of air compressor 100, air compressor 100 is the abbreviation of air compressor, it is used to compress air.

[0047] The air compressor 100 comprises a cylinder head assembly 10, which comprises a cylinder head 1 and a valve seat 2 matched with each other, an intake cavity 3 and an exhaust cavity 4 formed between the cylinder head 1 and the valve seat 2, and a flow path 5.

[0048] The valve seat 2 is provided with an intake hole 21 and an unloading hole 22, which communicate the intake cavity 3 with the outside of the cylinder head assembly 10, and an exhaust hole 23, which communicates the exhaust cavity 4 with the outside of the cylinder head assembly 10. The cylinder head assembly 10 further comprises a first valve 6 for preventing air from entering the intake cavity 3 from the outside of the cylinder head assembly 10 through the intake hole 21, a second valve 7 for preventing air from flowing out of the exhaust cavity 4 to the outside of the cylinder head assembly 10 through the exhaust hole 23, and an unloading structure 8 for closing and opening the unloading hole 22.

[0049] Under the action of the first valve 6, air in the intake cavity 3 can flow to the outside of the cylinder head assembly 10 through the intake hole 21, but air cannot flow from the outside of the cylinder head assembly 10 to the intake cavity 3 through the intake hole 21. Under the action of the second valve 7, air in the exhaust cavity 4 cannot flow to the outside of the cylinder head assembly 10 through the exhaust hole 23, but air can flow from the outside of the cylinder head assembly 10 to the exhaust cavity 4 through the exhaust hole 23.

[0050] The cylinder head assembly 10 is used in the air compressor 100, which comprises a cylinder body 20, a cylinder piston cavity 201 formed in the cylinder body 20, a cylinder piston 202 arranged in the cylinder piston cavity 201, and a driving member 30 for driving the cylinder piston 202 to reciprocate in the cylinder piston cavity 201. The cylinder piston 202 divides the cylinder piston cavity 201 into an upper piston cavity and a lower piston cavity. Figure 6 In particular, the driving member 30 should be considered as being capable of driving two cylinder pistons 202 to reciprocate.

[0051] The cylinder head assembly 10 is mounted on the cylinder body 20, wherein the intake cavity 3 is unidirectionally communicated with the cylinder piston cavity 201 through the intake hole 21, the exhaust cavity 4 is unidirectionally communicated with the cylinder piston cavity 201 through the exhaust hole 23, and the unloading hole 22 can communicate the cylinder piston cavity 201 and the intake cavity 3.

[0052] The intake cavity 3 is communicated with the atmosphere, and the exhaust cavity 4 is communicated with a gas storage tank for storing compressed gas or other equipment requiring introduction of compressed gas. Specifically, the cylinder head 1 is formed with an intake port 11 and an exhaust port 12, which communicate the intake cavity 3 and the outside of the cylinder head assembly 10 and the exhaust cavity 4 and the outside of the cylinder head assembly 10, respectively. The intake cavity 3 is communicated with the atmosphere through the intake port 11, and the exhaust cavity 4 is communicated with the gas storage tank for storing compressed gas or other equipment requiring introduction of compressed gas through the exhaust port 12.

[0053] When the air compressor 100 is in operation, the driving member 30 drives the cylinder piston 202 to reciprocate in the cylinder piston cavity 201. As Figure 6As shown, the cylinder head assembly 10 is located above the cylinder body 20, and the cylinder piston 202 reciprocates along the up-down direction, when the cylinder piston 202 moves downward, the volume of the upper piston cavity increases, so that the air in the intake cavity 3 can flow into the upper piston cavity through the intake hole 21, and then, when the cylinder piston 202 moves upward, the volume of the upper piston cavity decreases, the air in the upper piston cavity enters the exhaust cavity 4 through the exhaust hole 23 and is compressed, in this way, compressed air can be generated in the exhaust cavity 4. In the above process, the unloading structure 8 makes the unloading hole 22 in a closed state, that is, the cylinder piston cavity 201 and the intake cavity 3 cannot communicate through the unloading hole 22. The compressed air can be outputted to the gas tank or other devices that need to introduce compressed air.

[0054] In this embodiment, the first valve piece 6 is a first flexible valve plate connected to the valve seat 2 and covering the end of the intake hole 21 away from the intake cavity 3, and the second valve piece 7 is a second flexible valve plate connected to the valve seat 2 and covering the end of the exhaust hole 23 close to the exhaust cavity 4. During the downward movement of the cylinder piston 202, the first flexible valve plate can be flexibly deformed under the action of the air in the intake cavity 3, so that the air in the intake cavity 3 can flow into the cylinder piston cavity 201 through the intake hole 21, while the second flexible valve plate tightly abuts the valve seat 2, and the air in the exhaust cavity 4 cannot enter the cylinder piston cavity 201 through the exhaust hole 23; during the upward movement of the cylinder piston 202, the second flexible valve plate can be flexibly deformed under the action of the air in the cylinder piston cavity 201, so that the air in the cylinder piston cavity 201 can enter the exhaust cavity 4 through the exhaust hole 23, while the first flexible valve plate tightly abuts the valve seat 2, and the air in the cylinder piston cavity 201 cannot enter the intake cavity 3 through the intake hole 21.

[0055] In other embodiments, the first valve piece 6 and the second valve piece 7 can also be other one-way valve structures for realizing one-way communication.

[0056] When it is not necessary to output compressed air, the air compressor 100 can enter the unloading state, and the specific process is as follows: the unloading structure 8 opens the unloading hole 22, so that the cylinder piston cavity 201 and the intake cavity 3 are communicated, as described above, the intake cavity 3 is communicated with the atmosphere, when the cylinder piston 202 moves upward, the air in the upper piston cavity will enter the intake cavity 3, but not enter the exhaust cavity 4 (the pressure in the exhaust cavity 4 is greater than the atmospheric pressure), in this way, the air compressor 100 no longer compresses air, which saves energy consumption.

[0057] When the air compressor 100 is working, a large amount of heat will be generated on the cylinder head assembly 10, and the flow path 5 can be used for the flow of cooling liquid to take away the heat on the cylinder head assembly 10.

[0058] In the embodiment, the intake cavity 3, the exhaust cavity 4 and the flow path 5 are formed by the cylinder head 1 and the valve seat 2, the cylinder head 1 is formed with a part of the intake cavity 3, the exhaust cavity 4 and the flow path 5, and the valve seat 2 is formed with another part of the intake cavity 3, the exhaust cavity 4 and the flow path 5, that is, the cylinder head 1 and the valve seat 2 are both formed with at least part of the intake cavity 3, at least part of the exhaust cavity 4 and at least part of the flow path 5. In this way, the structure of the cylinder head assembly 10 is simplified, and heat dissipation of the cylinder head assembly 10 is more facilitated.

[0059] The unloading structure 8 includes a valve core 81, a piston 82 formed on the valve core 81, a piston cavity 83 formed in the cylinder head 1 and matched with the piston 82, and an air passage 13 formed in the cylinder head 1 and communicating between the outside of the cylinder head assembly 10 and the piston cavity 83.

[0060] The air passage 13 is used to introduce compressed gas into the piston cavity 83 to control the position of the piston 82 in the piston cavity 83, and when the position of the piston 82 changes, the valve core 81 also moves in the axial direction of the piston cavity 83. One end of the valve core 81 extends into the intake cavity 3 and includes a first position for closing the unloading hole 22 and a second position for moving away from the unloading hole 22 after the first position. It is conceivable that a through hole is formed in the cylinder head 1 for the valve core 81 to extend from the piston cavity 83 into the intake cavity 3.

[0061] As shown in Figure 7 , the air passage 13 is formed with a vent 14 on the outer side wall of the cylinder head 1, and the compressed gas enters the air passage 13 through the vent 14. Figure 7 In the embodiment, a plug 15 is arranged at the vent 14, and when it is necessary to fill compressed gas into the air passage 13, the plug 15 needs to be removed from the cylinder head 1.

[0062] When the valve core 81 is in the first position, the unloading hole 22 is in a closed state, and at this time the cylinder body piston cavity 201 and the intake cavity 3 are not communicated, and when the valve core 81 is in the second position, the unloading hole 22 is in an open state, and at this time the cylinder body piston cavity 201 and the intake cavity 3 can be communicated through the unloading hole 22.

[0063] The cylinder head 1 includes a cover body 16 and a cover plate 17 connected to the cover body 16, the piston cavity 83 is formed by the cover body 16 and the cover plate 17, the cover plate 17 is located on the side of the piston cavity 83 away from the unloading hole 22 and closes the piston cavity 83, the piston 82 divides the piston cavity 83 into a first gas cavity 831 close to the unloading hole 22 and a second gas cavity 832 away from the unloading hole 22, and the air passage 13 communicates between the outside of the cylinder head assembly 10 and the first gas cavity 831. The unloading structure 8 further includes a resilient structure 84 arranged between the cover plate 17 and the valve core 81, and the two ends of the resilient structure 84 in the elastic extension direction abut the valve core 81 and the cover plate 17, respectively.

[0064] Under the action of the elastic structure 84, the valve core 81 can remain in the first position under normal conditions. When the valve core 81 needs to switch from the first position to the second position, compressed gas is injected into the first air chamber 831 through the air passage 13. The compressed gas in the first air chamber 831 can overcome the elastic force of the elastic structure 84, so that the valve core 81 moves from the first position to the second position.

[0065] Specifically, the valve core 81 has a receiving cavity 811. The aforementioned elastic structure 84 includes a supporting block 841 and a compression spring 842 located within the receiving cavity 811. The supporting block 841 is close to the cover plate 17, with one end abutting against the cover plate 17. The compression spring 842 is elastically extended and retracted along the axial direction of the piston cavity 83, and its two ends abut against the supporting block 841 and the valve core 81, respectively. The elastic structure 84 may also include a positioning post 843 extending from the supporting block 841 into the compression spring 842. The positioning post 843 can define the position of the compression spring 842.

[0066] In this embodiment, the air compressor 100 is a twin-cylinder air compressor 100, with two cylinder piston chambers 201 inside its cylinder body 20, and each cylinder piston chamber 201 containing a cylinder piston 202. The driving component 30 is a crankshaft, and both cylinder pistons 202 are connected to the crankshaft. Figure 6 (The view is not shown), when the crankshaft rotates, it can drive the two cylinder pistons 202 to reciprocate within their respective cylinder piston chambers 201. The air compressor 100 also includes a rotation drive assembly (not shown) for driving the crankshaft to rotate.

[0067] The valve seat 2 is provided with two sets of air inlet holes 21, two sets of air outlet holes 23, and two unloading holes 22. Thus, each piston chamber 201 of the cylinder has one set of air inlet holes 21, one set of air outlet holes 23, and one unloading hole 22. The unloading structure 8 is provided with two to correspond to the two unloading holes 22 respectively, and the cover plate 17 is provided with two to close the piston chambers 83 on the two unloading structures 8 respectively. It is conceivable that the first valve 6 and the second valve 7 also need to be provided with two sets.

[0068] The aforementioned air passage 13 can be bifurcated, meaning that after compressed air enters the air passage 13 through the air inlet 14, it splits into two paths that enter the first air chambers 831 of the two unloading structures 8 respectively. Alternatively, the air passage 13 can be provided with two paths, with the two air passages 13 respectively connecting the first air chambers 831 of the two unloading structures 8 to the outside of the cylinder head assembly 10.

[0069] The two cylinder pistons 202 are staggered in the vertical direction. When both unloading holes 22 are open, the two cylinder piston chambers 201 are connected through the air intake chamber 3. At this time, the drive component 30 rotates, and the air compressor 100 is in an unloaded state and will not output compressed air.

[0070] The flow path 5 is arranged around the intake cavity 3 and the exhaust cavity 4, and the cylinder head 1 is formed with an inlet port 18 and an outlet port 19 of the flow path 5, so that the cooling liquid can enter the flow path 5 from the inlet port 18 and flow out of the outlet port 19 after flowing through the flow path 5. During the flowing of the cooling liquid through the flow path 5, the heat on the cylinder head assembly 10 can be taken away.

[0071] In the embodiment, the intake cavity 3 includes a cylinder head intake cavity 31 and a valve seat intake cavity 32 formed in the cylinder head 1 and the valve seat 2 respectively, the exhaust cavity 4 includes a cylinder head exhaust cavity 41 and a valve seat exhaust cavity 42 formed in the cylinder head 1 and the valve seat 2 respectively, and the flow path 5 includes a cylinder head flow path 51 and a valve seat flow path 52 formed in the cylinder head 1 and the valve seat 2 respectively. The inlet port 18 and the outlet port 19 are communicated with the cylinder head flow path 51.

[0072] The cylinder head assembly 10 further includes a partition plate 9 arranged between the cylinder head 1 and the valve seat 2, and the partition plate 9 is provided with a plurality of communication holes for communicating the cylinder head intake cavity 31 and the valve seat intake cavity 32, the cylinder head exhaust cavity 41 and the valve seat exhaust cavity 42, and the cylinder head flow path 51 and the valve seat flow path 52. The partition plate 9 can strengthen the strength of the cylinder head assembly 10 without affecting the communication between the cylinder head intake cavity 31 and the valve seat intake cavity 32, the communication between the cylinder head exhaust cavity 41 and the valve seat exhaust cavity 42, and the communication between the cylinder head flow path 51 and the valve seat flow path 52.

[0073] To ensure the sealing between the partition plate 9 and the cylinder head 1 and the valve seat 2, the cylinder head assembly 10 further includes a first sealing gasket 91 arranged between the partition plate 9 and the cylinder head 1, and a second sealing gasket 92 arranged between the partition plate 9 and the valve seat 2.

[0074] The cylinder head flow path 51 is provided with a plurality of cylinder head flow paths 51, and the valve seat flow path 52 is provided with a plurality of valve seat flow paths 52. The plurality of cylinder head flow paths 51 are not communicated with each other on the cylinder head 1, and are communicated through at least one valve seat flow path 52. The plurality of valve seat flow paths 52 are not communicated with each other on the valve seat 2, and are communicated through at least one cylinder head flow path 51. After the cooling liquid enters one cylinder head flow path 51 through the inlet port 18, it needs to pass through at least one valve seat flow path 52 to communicate with other cylinder head flow paths 51. The plurality of valve seat flow paths 52 on the valve seat 2 also need to pass through at least one cylinder head flow path 51 to communicate with each other. In this way, the cooling liquid can flow in the cylinder head 1 and the valve seat 2 sufficiently to effectively take away the heat on the cylinder head assembly 10.

[0075] Specifically, as shown in FIG. 1, the cylinder head flow path 51 includes a first cylinder head flow path 51a, a second cylinder head flow path 51b and a third cylinder head flow path 51c, and the first cylinder head flow path 51a, the second cylinder head flow path 51b and the third cylinder head flow path 51c are not communicated with each other on the cylinder head 1. The valve seat flow path 52 includes a first valve seat flow path 52a, a second valve seat flow path 52b and a third valve seat flow path 53c, and the first valve seat flow path 52a, the second valve seat flow path 52b and the third valve seat flow path 53c are not communicated with each other on the valve seat 2. Figures 3-5 ​

[0076] The first head flow path 51a and the second head flow path 51b are communicated through the second valve seat flow path 52b (specifically Figure 4 the portion of the second valve seat flow path 52b extending in the up-down direction on the right side), the second head flow path 51b and the third head flow path 51c are communicated through the third valve seat flow path 52c, the first valve seat flow path 52a and the second valve seat flow path 52b are communicated through the first head flow path 51a (specifically Figure 3 the portion of the first head flow path 51a extending in the left-right direction on the top side), the second valve seat flow path 52b and the third valve seat flow path 53c are communicated through the second head flow path 51b and the third head flow path 51c (specifically Figure 3 the second head flow path 51b on the lower left corner and the third head flow path 51c on the lower right corner).

[0077] With the above arrangement, the coolant can flow sufficiently in the head 1 and the valve seat 2 to effectively take away the heat on the cylinder head assembly 10.

[0078] The head 1 and the valve seat 2 are both made of aluminum alloy material, which has good heat conduction performance. Thus, when the coolant contacts the head 1 and the valve seat 2, it can effectively take away the heat on the cylinder head assembly 10.

[0079] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A cylinder head assembly for an air compressor, comprising: The cylinder head assembly comprises a cylinder head and a valve seat, an intake cavity and an exhaust cavity formed between the cylinder head and the valve seat, and a flow path; The valve seat is provided with an intake hole and a relief hole communicating with the intake cavity and the outside of the cylinder head assembly, and an exhaust hole communicating with the exhaust cavity and the outside of the cylinder head assembly, the cylinder head assembly further comprises a first valve member for preventing air from entering the intake cavity from the outside of the cylinder head assembly through the intake hole, a second valve member for preventing air from flowing out of the exhaust cavity to the outside of the cylinder head assembly through the exhaust hole, and a relief structure for closing and opening the relief hole; The cylinder head and the valve seat are each formed with at least part of the intake cavity, at least part of the exhaust cavity, and at least part of the flow path.

2. The cylinder head assembly of claim 1, wherein The relief structure comprises a valve core, a piston formed on the valve core, a piston cavity formed in the cylinder head and matched with the piston, and a gas path formed in the cylinder head and communicating with the outside of the cylinder head assembly and the piston cavity; The gas path is used to introduce compressed gas into the piston cavity to control the position of the piston in the piston cavity, one end of the valve core extends into the intake cavity and comprises a first position for closing the relief hole and a second position for moving away from the relief hole, and the cylinder head is provided with a through hole for the valve core to extend from the piston cavity into the intake cavity.

3. The cylinder head assembly of claim 2, wherein, The cylinder head comprises a cover body and a cover plate connected to the cover body, the piston cavity is formed by the cover body and the cover plate, the cover plate is located on the side of the piston cavity away from the relief hole and closes the piston cavity, the piston divides the piston cavity into a first gas cavity close to the relief hole and a second gas cavity away from the relief hole, and the gas path communicates the outside of the cylinder head assembly with the first gas cavity; The relief structure further comprises a resilient structure arranged between the cover plate and the valve core, and the two ends of the resilient structure in the elastic extension direction abut against the valve core and the cover plate respectively.

4. The cylinder head assembly of claim 3, wherein, The valve seat is provided with two groups of intake holes, two groups of exhaust holes, and two relief holes, the relief structure is provided with two corresponding to the two relief holes respectively, and the cover plate is provided with two corresponding to the two relief structures respectively.

5. The cylinder head assembly of claim 1, wherein, The flow path is arranged around the intake cavity and the exhaust cavity.

6. The cylinder head assembly of claim 5, wherein, The intake cavity comprises a cylinder head intake cavity and a valve seat intake cavity formed in the cylinder head and the valve seat respectively, the exhaust cavity comprises a cylinder head exhaust cavity and a valve seat exhaust cavity formed in the cylinder head and the valve seat respectively, and the flow path comprises a cylinder head flow path and a valve seat flow path formed in the cylinder head and the valve seat respectively; The cylinder head assembly further comprises a partition plate arranged between the cylinder head and the valve seat, and the partition plate is provided with a plurality of communication holes for communicating the cylinder head intake cavity and the valve seat intake cavity, the cylinder head exhaust cavity and the valve seat exhaust cavity, and the cylinder head flow path and the valve seat flow path.

7. The cylinder head assembly of claim 6, wherein, The cylinder head flow path and the valve seat flow path are each provided with a plurality of, the plurality of cylinder head flow paths are communicated through at least one valve seat flow path, and the plurality of valve seat flow paths are communicated through at least one cylinder head flow path.

8. The cylinder head assembly of claim 1, wherein, The first valve member is a first flexible valve sheet connected to the valve seat and covering one end of the air inlet hole away from the air inlet cavity, and the second valve member is a second flexible valve sheet connected to the valve seat and covering one end of the air outlet hole close to the air outlet cavity.

9. The cylinder head assembly of claim 1, wherein, The cylinder head and the valve seat are both made of aluminum alloy material.

10. An air compressor characterized by comprising: The cylinder head assembly comprises the cylinder head assembly according to any one of claims 1-9.

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