Cylinder head assembly, compressor and refrigeration equipment

Abstract

The present invention discloses a cylinder head assembly, a compressor and a refrigeration device, including a cylinder seat, a cylinder cover component and a gland, wherein the cylinder seat is provided with a cylinder hole, the cylinder seat forms a boss at the end of the cylinder hole, the boss has a circular outer peripheral surface, the cylinder seat is provided with a plurality of mounting holes, the cylinder cover component includes a cylinder head body, the cylinder head body has a concave cavity, the concave cavity has a circular inner peripheral surface, the cylinder head body is assembled at the end of the cylinder hole of the cylinder seat, the circular inner peripheral surface of the concave cavity matches the circular outer peripheral surface of the boss, the gland is connected to the cylinder seat through a fastener provided in the mounting hole, the gland presses the cylinder head component from the back side, at least one positioning structure is provided on the outside of the cylinder head body, the positioning structure is connected to the cylinder head body to form a whole, the positioning structure is embedded in the mounting hole, and a through hole for the fastener to pass through is provided inside the positioning structure. The mounting hole on the cylinder seat is cleverly used to position and install the cylinder head component to form a circumferential positioning effect, the cylinder seat has no additional positioning structure, the process is simple and the cost is low.

Description

Technical Field

[0001] The invention is used in the field of compressors, and in particular relates to a cylinder head assembly, a compressor and a refrigeration device. Background Art

[0002] Household refrigerator compressors usually include a movement and a housing, and the movement is composed of a motor component and a pump body. The pump body is provided with a cylinder head component, which is usually square. The parts mainly include: cylinder head, cylinder head gasket, intake muffler, valve plate component, intake valve plate, valve plate gasket, cylinder head screw, exhaust muffler, etc., among which there are four cylinder head screws, the cylinder head is made of aluminum alloy, and the exhaust muffler is made of iron. The cylinder head, cylinder head gasket, valve plate component, intake valve plate, and valve plate gasket are square in appearance, and cylinder head screw mounting holes are set at the four corners. Correspondingly, a threaded hole is set on the cylinder seat plate surface (near the top of the cylinder hole), and four cylinder head screws cooperate with the threaded hole to tighten the cylinder head component. The entire cylinder head is large in size and weight, the center of gravity of the compressor is seriously offset, and the compressor vibrates greatly; the material consumption is also high in weight, resulting in high compressor cost. The cylinder head is made of aluminum alloy and is easy to deform. Therefore, it needs to be particularly thick to ensure sufficient strength, resulting in high cost of the cylinder head. Due to the large thickness of the cylinder head, the gap between the movement and the housing is too small, so the housing size cannot be further reduced, or the distance between the cylinder seat plate surface cannot be further lengthened. The threaded hole of the cylinder seat is close to the top of the cylinder bore. After the cylinder head screws tighten the cylinder head components under the action of the preload, the cylinder bore is greatly deformed, especially the top of the cylinder bore, which is easy to affect the performance of the compressor, especially the high-efficiency compressor. In order to reduce the deformation of the cylinder bore, a countersunk hole with a larger inner diameter is usually provided at the end of the threaded hole on the cylinder seat plate surface. Some compressor cylinder head solutions are changed to a circular cylinder head structure, using a complex circumferential positioning method. The cylinder seat and cylinder head assembly need to add additional positioning structures to avoid inaccurate positioning of the circular cylinder head assembly due to rotation, which greatly increases the process complexity and processing cost, and also reduces the positioning accuracy. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a cylinder head assembly, a compressor and a refrigeration device.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] In a first aspect, a cylinder head assembly comprises a cylinder seat, a cylinder cover component and a pressure cover, wherein the cylinder seat is provided with a cylinder hole, the cylinder seat forms a boss at the end of the cylinder hole, the boss has a circular outer circumferential surface, the cylinder seat is provided with a plurality of mounting holes on the outer side of the boss, the cylinder head component comprises a cylinder head body, the cylinder head body has a concave cavity, the concave cavity has a circular inner circumferential surface, the cylinder head body is assembled on the end of the cylinder hole of the cylinder seat, the circular inner circumferential surface of the concave cavity matches the circular outer circumferential surface of the boss, the pressure cover is connected to the cylinder seat by a fastener arranged in the mounting hole, the pressure cover presses the cylinder head component from the back side, at least one positioning structure is provided on the outside of the cylinder head body, the positioning structure is connected to the cylinder head body to form a whole, the positioning structure is embedded in the mounting hole, and a through hole for the fastener to pass through is provided inside the positioning structure.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the end of the boss forms a first end face, the cylinder seat is provided with a second end face on the outer side of the boss, the first end face protrudes from the second end face, the first end face and the second end face form a height difference in the extension direction of the cylinder hole, the mounting hole is provided on the second end face, the mounting hole includes a countersunk hole provided on the second end face, and the bottom of the countersunk hole is provided with a threaded hole that cooperates with the fastener.

[0007] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the aperture of the countersunk hole is larger than the inner diameter of the threaded hole, the positioning structure is connected to the cylinder head body through an arm structure to form a whole, the positioning structure extends a certain length from the arm structure in the direction of the countersunk hole, and the positioning structure is inserted into the countersunk hole and cooperates with the countersunk hole to form circumferential positioning.

[0008] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the mounting hole includes a first mounting hole, a second mounting hole and a third mounting hole, the positioning structure includes a first positioning structure and a second positioning structure, the first positioning structure is embedded in the first mounting hole, the second positioning structure is embedded in the second mounting hole, a connecting arm extending toward the second end face is provided on the outer side of the pressure cover, a fastening platform is provided at the end of the connecting arm, the fastening platform is provided with a fastening hole, the connecting arm includes a first connecting arm, a second connecting arm and a third connecting arm, the lengths of the first connecting arm and the second connecting arm are less than the length of the third connecting arm, the fastening platform of the first connecting arm is connected to the first mounting hole by a fastener, the fastening platform of the second connecting arm is connected to the second mounting hole by a fastener, and the fastening platform of the third connecting arm is connected to the third mounting hole by a fastener.

[0009] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the outer edge of the fastening platform of the first connecting arm and the outer edge of the fastening platform of the second connecting arm are provided with a support step extending toward the second end face, and the support step is used to avoid the positioning structure and be supported on the second end face when the fastener is locked.

[0010] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the cylinder head component includes an exhaust muffler, the exhaust muffler and the cylinder head body are made of plastic as one piece, and the cylinder head body has an exhaust hole connected to the exhaust muffler.

[0011] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the pressure cover includes a clamping ring arranged on the back side of the cylinder head component, and the clamping ring forms a cone inclined toward the cylinder head component from the outer edge to the inner edge. The inner ring edge of the inner edge of the clamping ring is upturned, and the bottom forms an arc-shaped clamping surface, which is pressed against the cylinder head body.

[0012] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, it also includes an intake muffler, the cylinder head component is provided with an intake muffler mounting port, the outlet end of the intake muffler is assembled on the intake muffler mounting port, the clamping ring presses the intake muffler from the back side, the inner side of the clamping ring is provided with a clamping arm, the clamping arm forms an elastic structure of a cantilever beam, the end of the clamping arm is upturned, and the bottom forms an arc-shaped clamping surface, the position of the clamping arm corresponds to the position of the outlet end of the intake muffler, and the clamping surface at the bottom of the clamping arm is pressed on the intake muffler with elastic force.

[0013] In a second aspect, a compressor comprises the cylinder head assembly described in any implementation manner in the first aspect.

[0014] In a third aspect, a refrigeration device comprises the compressor described in any implementation of the second aspect.

[0015] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of the present invention, the cylinder head body and the cylinder seat adopt a circular design, and the cylinder head body is fastened to the cylinder seat by a pressure cover, thereby reducing material consumption. The cylinder head body is provided with a positioning structure, and the positioning structure is embedded in the mounting hole of the cylinder seat during installation, thereby cleverly utilizing the mounting hole on the cylinder seat to position and install the cylinder head component, thereby forming a circumferential positioning effect. The cylinder seat has no additional positioning structure, and the process is simple and the cost is low.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic structural diagram of an embodiment of a cylinder head assembly of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the cylinder seat structure of an embodiment is shown;

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of a cylinder head component of an embodiment is shown;

[0021] Figure 4 yes Figure 1 A schematic diagram of a gland structure of an embodiment is shown;

[0022] Figure 5 yes Figure 1 A cross-sectional view of a gland structure according to an embodiment is shown. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0025] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] See also Figure 1 , Figure 2 , Figure 3 An embodiment of the present invention provides a cylinder head assembly, including a cylinder seat 100, a cylinder head component 200 and a gland 300. The cylinder seat 100 is provided with a cylinder hole 101. The cylinder seat 100 forms a boss 102 at the end of the cylinder hole 101. The end surface of the boss 102 forms a ring extending around the cylinder hole 101. The end surface of the boss 102 is used to support and cooperate with cylinder head components such as a valve plate component and a valve plate gasket. The boss 102 has a circular outer circumferential surface 103, and the circular outer circumferential surface 103 of the boss 102 is coaxially or eccentrically arranged with the cylinder hole 101. The cylinder seat 100 is provided with a plurality of mounting holes 104 on the outer side of the boss 102. The cylinder head component 200 includes a cylinder head body 201, and the cylinder head body 201 has a concave cavity, and the concave cavity forms an opening on the side facing the boss 102, and the interior of the concave cavity has a circular inner circumferential surface 202. The circular inner circumferential surface 202 can be used to cooperate with the circular outer circumferential surface 103 of the boss 102 on the one hand, and on the other hand, it can also be used for the installation and positioning of valve plate components, valve plate gaskets, etc.

[0028] The cylinder head body 201 is assembled at the end of the cylinder hole 101 of the cylinder seat 100, and the circular inner circumference 202 of the concave cavity cooperates with the circular outer circumference 103 of the boss 102 to achieve guiding positioning. The gland 300 is connected to the cylinder seat 100 through a fastener 400 (such as a screw) provided in the mounting hole 104. The gland 300 presses the cylinder head component 200 from the back side. At least one positioning structure 203 is provided on the outside of the cylinder head body 201. The positioning structure 203 is connected to the cylinder head body 201 to form a whole. The positioning structure 203 is embedded in the mounting hole 104 to form circumferential positioning, thereby avoiding rotational displacement of the cylinder head assembly, thereby avoiding confusion in the assembly relationship of the parts. Among them, a through hole 204 for the fastener 400 to pass through is provided inside the positioning structure 203. The inner diameter of the through hole 204 of the positioning structure 203 allows the fastener 400 to pass through smoothly. It can be understood that the through hole 204 can be a closed-loop hole or a non-closed-loop hole. For example, when the through hole 204 is set as a closed-loop hole, the positioning structure 203 is ring-shaped.

[0029] In the technical solution of the present invention, the cylinder head body 201 and the cylinder seat 100 adopt a circular design, and the cylinder head body 201 is fastened to the cylinder seat 100 by the pressure cover 300, thereby reducing material consumption. The cylinder head body 201 is provided with a positioning structure 203, and the positioning structure 203 is embedded in the mounting hole 104 of the cylinder seat 100 during installation, thereby cleverly using the mounting hole 104 on the cylinder seat 100 as the positioning structure 203, which not only meets the circumferential positioning requirements, but also avoids the cylinder seat 100 The additional processing of the positioning structure 203 has precise positioning, simple structure, and no additional process cost.

[0030] In some embodiments, see Figure 2 , the end of the boss 102 forms a first end face 105, and the cylinder seat 100 is provided with a second end face 106 on the outer side of the boss 102, the first end face 105 protrudes from the second end face 106, and the first end face 105 and the second end face 106 form a height difference in the extension direction of the cylinder hole 101, and the height difference is preferably 1 to 4 mm. The mounting hole 104 is provided on the second end face 106, and the mounting hole 104 includes a countersunk hole provided on the second end face 106, and the bottom of the countersunk hole is provided with a threaded hole that cooperates with the fastener 400. In other words, the ends of the mounting holes 104 are all provided with countersunk holes, and the depth of the countersunk holes is preferably 2 to 6 mm. On the one hand, the countersunk holes make the threaded holes farther away from the end of the cylinder hole 101, so as to avoid deformation of the cylinder hole 101 after the screws are tightened, resulting in the piston being stuck, and on the other hand, they also provide space for the assembly positioning structure 203. The plate structure of the cylinder seat 100 is simple, without an additional positioning structure 203, and is easy to process, effectively reducing the process cost.

[0031] In some embodiments, see Figure 2 , Figure 3 The aperture of the countersunk hole is larger than the inner diameter of the threaded hole. The positioning structure 203 is connected to the cylinder head body 201 through the arm structure to form a whole. The arm structure extends radially outward. The positioning structure 203 extends a certain length from the arm structure in the direction of the countersunk hole. The positioning structure 203 is inserted into the countersunk hole and cooperates with the countersunk hole to form circumferential positioning. The cylinder head assembly is prevented from generating rotational displacement, thereby avoiding confusion in the assembly relationship of the parts. The present invention cleverly utilizes the ready-made countersunk hole on the second end face 106 of the cylinder seat 100 as the positioning structure 203, which not only meets the circumferential positioning requirements, but also avoids the cylinder seat 100 from additionally processing the positioning structure 203, with accurate positioning, simple structure, and no additional process cost.

[0032] Further, the positioning structure 203 may be one or more. For example, in some embodiments, see Figure 1 to Figure 3The mounting hole 104 includes a first mounting hole, a second mounting hole and a third mounting hole, and the first mounting hole, the second mounting hole and the third mounting hole are distributed circumferentially around the periphery of the boss 102. The positioning structure 203 includes a first positioning structure and a second positioning structure, and the first positioning structure is embedded in the first mounting hole, and the second positioning structure is embedded in the second mounting hole.

[0033] See also Figure 1 , Figure 4 The gland 300 is provided with a connecting arm extending toward the second end surface 106 on the outside, a fastening platform 301 is provided at the end of the connecting arm, and a fastening hole 302 is provided on the fastening platform 301. The connecting arm includes a first connecting arm 303, a second connecting arm 304, and a third connecting arm 305. The first connecting arm 303, the second connecting arm 304, and the third connecting arm 305 correspond to the positions of the first mounting hole, the second mounting hole, and the third mounting hole. The lengths of the first connecting arm 303 and the second connecting arm 304 are less than the length of the third connecting arm 305. The fastening platform 301 of the first connecting arm 303 is connected to the first mounting hole through a fastener 400, the fastening platform 301 of the second connecting arm 304 is connected to the second mounting hole through a fastener 400, and the fastening platform 301 of the third connecting arm 305 is connected to the third mounting hole through a fastener 400. Among them, the third connecting arm 305 is longer, and the fastening platform 301 thereon matches with the second end surface of the cylinder block 100. The first connecting arm 303 and the second connecting arm 304 are relatively short in length, corresponding to the two positioning structures 203 of the cylinder head, and there is a gap between the two corresponding fastening platforms 301 and the end faces of the two positioning structures 203, so that sufficient pre-tightening force can be generated after the fastener 400 is fastened. If there is no such gap, the fastener 400 directly tightens the fastening platform 301 on the positioning structure 203, and the gland 300 cannot generate sufficient pre-tightening force, and the positioning structure 203 will also be damaged.

[0034] For further information, see Figure 1 , Figure 4 The outer edge of the fastening platform 301 of the first connecting arm 303 and the outer edge of the fastening platform 301 of the second connecting arm 304 are provided with a support step 306 extending toward the second end surface 106. The support step 306 is used to avoid the positioning structure 203 and support the second end surface 106 when the fastener 400 is locked. When the fastening platform 301 is deformed too much due to the excessive pre-tightening force of the fastener 400, such as a screw, the support step 306 will contact the second end surface 106 of the cylinder seat 100 to play a supporting role. At this time, there is still a certain gap between the fastening platform 301 and the positioning structure 203 to prevent the fastening platform 301 from crushing the positioning structure 203.

[0035] The compressor of household refrigerators is mainly a reciprocating piston compressor. One of the characteristics of reciprocating compressors is that the compression ratio is very large, so the temperature of the refrigerant is very high after the cylinder is compressed. The high-temperature refrigerant flows out from the exhaust hole of the valve plate, enters the internal volume of the aluminum cylinder head, and then enters the iron exhaust muffler. Therefore, a strong temperature difference is formed between the inside and outside of the aluminum cylinder head and the iron exhaust muffler. Both aluminum and iron are good conductors of heat, which causes the heat of the high-temperature refrigerant inside the aluminum cylinder head and the iron exhaust muffler to be dissipated into the inner cavity of the compressor shell through heat conduction, gas convection and other heat exchange forms, causing the gas temperature inside the compressor shell to rise sharply, thereby causing the compressor suction temperature to rise, forming harmful suction overheating, seriously affecting the suction efficiency of the compressor, and reducing the compressor refrigeration capacity and performance coefficient.

[0036] In some embodiments, see Figure 3 The cylinder head component 200 includes an exhaust muffler 205, which is made of plastic as a whole with the cylinder head body 201. The cylinder head body 201 has an exhaust hole 206 inside that is connected to the exhaust muffler 205. In this embodiment, the cylinder head component 200 is integrally injection molded by plastic, and the material is preferably glass fiber reinforced nylon material, which has good thermal insulation performance, avoids the transfer of heat from high-temperature gas in the exhaust channel to the inside of the compressor housing, effectively reduces the compressor suction overheating, and improves the compressor refrigeration capacity and performance coefficient.

[0037] The portion of the gland 300 on the back side of the cylinder head body 201 may be circular, irregular or annular. For example, in some embodiments, see Figure 1 , Figure 4 , Figure 5 The gland 300 includes a clamping ring 307 disposed on the back side of the cylinder head component 200. The clamping ring 307 extends along the circumferential direction of the edge of the cylinder head body 201. The clamping ring 307 forms a cone that tilts toward the cylinder head component 200 from the outer edge to the inner edge. The inner edge of the clamping ring 307 is upturned, and the bottom forms an arc-shaped clamping surface 308, which is pressed against the cylinder head body 201. This prevents the sharp edge from damaging the end face of the plastic cylinder head body 201 due to excessive pre-tightening force.

[0038] For further information, see Figure 1 , Figure 4 , Figure 5, and also includes an air suction muffler 500, a cylinder head component 200 is provided with an air suction muffler mounting port 207, an air outlet end of the air suction muffler 500 is assembled on the air suction muffler mounting port 207, a clamping ring 307 clamps the air suction muffler 500 from the back side, a clamping arm 308 is provided on the inner side of the clamping ring 307, the clamping arm 308 forms an elastic structure of a cantilever beam, the end of the clamping arm 308 is upturned, and an arc-shaped clamping surface 308 is formed at the bottom, the position of the clamping arm 308 corresponds to the position of the air outlet end of the air suction muffler 500, and the clamping surface at the bottom of the clamping arm 308 is pressed on the air suction muffler 500 with elastic force, so as to prevent the air suction muffler 500 from loosening and causing wear and abnormal noise. In this embodiment, the pressure cover 300 has an ingenious structure, which not only clamps the cylinder head component, but also clamps the air suction muffler 500, and at the same time avoids damaging the positioning structure 203 of the cylinder head.

[0039] An embodiment of the present invention further provides a compressor, comprising the cylinder head assembly in any one of the above embodiments.

[0040] An embodiment of the present invention further provides a refrigeration device, comprising the compressor in any one of the above embodiments.

[0041] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A cylinder head assembly, characterized in that: The cylinder block comprises a cylinder seat, a cylinder head component and a pressure cover, wherein the cylinder seat is provided with a cylinder hole, the cylinder seat forms a boss at the end of the cylinder hole, the boss has a circular outer circumferential surface, the cylinder seat is provided with a plurality of mounting holes on the outer side of the boss, the cylinder head component comprises a cylinder head body, the cylinder head body has a concave cavity, the concave cavity has a circular inner circumferential surface, the cylinder head body is assembled on the end of the cylinder hole of the cylinder seat, the circular inner circumferential surface of the concave cavity matches the circular outer circumferential surface of the boss, the pressure cover is connected to the cylinder seat by a fastener arranged in the mounting hole, the pressure cover presses the cylinder head component from the back side, at least one positioning structure is provided on the outside of the cylinder head body, the positioning structure is connected to the cylinder head body to form a whole, the positioning structure is embedded in the mounting hole, and a through hole for the fastener to pass through is provided inside the positioning structure.

2. The cylinder head assembly according to claim 1, characterized in that: The end of the boss forms a first end face, the cylinder seat is provided with a second end face on the outer side of the boss, the first end face protrudes from the second end face, the first end face and the second end face form a height difference in the extension direction of the cylinder hole, the mounting hole is provided on the second end face, the mounting hole includes a countersunk hole provided on the second end face, and the bottom of the countersunk hole is provided with a threaded hole matching the fastener.

3. The cylinder head assembly according to claim 2, characterized in that: The aperture of the countersunk hole is larger than the inner diameter of the threaded hole. The positioning structure is connected to the cylinder head body through an arm structure to form a whole. The positioning structure extends a certain length from the arm structure toward the countersunk hole. The positioning structure is inserted into the countersunk hole and cooperates with the countersunk hole to form circumferential positioning.

4. The cylinder head assembly according to claim 2, characterized in that: The mounting hole includes a first mounting hole, a second mounting hole and a third mounting hole, the positioning structure includes a first positioning structure and a second positioning structure, the first positioning structure is embedded in the first mounting hole, the second positioning structure is embedded in the second mounting hole, a connecting arm extending toward the second end face is provided on the outer side of the pressure cover, a fastening platform is provided at the end of the connecting arm, and a fastening hole is provided on the fastening platform, the connecting arm includes a first connecting arm, a second connecting arm and a third connecting arm, the lengths of the first connecting arm and the second connecting arm are less than the length of the third connecting arm, the fastening platform of the first connecting arm is connected to the first mounting hole by a fastener, the fastening platform of the second connecting arm is connected to the second mounting hole by a fastener, and the fastening platform of the third connecting arm is connected to the third mounting hole by a fastener.

5. The cylinder head assembly according to claim 4, characterized in that: The outer edges of the fastening platforms of the first connecting arm and the second connecting arm are provided with supporting steps extending toward the second end surface, and the supporting steps are used to avoid the positioning structure and be supported on the second end surface when the fastener is locked.

6. The cylinder head assembly according to claim 1, characterized in that: The cylinder head component comprises an exhaust muffler, the exhaust muffler and the cylinder head body are made of plastic in one piece, and the cylinder head body has an exhaust hole inside which is communicated with the exhaust muffler.

7. The cylinder head assembly according to claim 1, characterized in that: The pressure cover includes a clamping ring arranged on the back side of the cylinder head component. The clamping ring forms a cone that is inclined toward the cylinder head component from the outer edge to the inner edge. The inner edge of the clamping ring has an inner ring edge that is upturned, and the bottom forms an arc-shaped clamping surface that is pressed against the cylinder head body.

8. The cylinder head assembly according to claim 7, characterized in that: It also includes an intake muffler, the cylinder head component is provided with an intake muffler mounting port, the outlet end of the intake muffler is assembled on the intake muffler mounting port, the clamping ring clamps the intake muffler from the back side, the inner side of the clamping ring is provided with a clamping arm, the clamping arm forms an elastic structure of a cantilever beam, the end of the clamping arm is upturned, and the bottom forms an arc-shaped clamping surface, the position of the clamping arm corresponds to the position of the outlet end of the intake muffler, and the clamping surface at the bottom of the clamping arm is pressed on the intake muffler with elastic force.

9. A compressor, characterized in that: A cylinder head assembly comprising any one of claims 1 to 8.

10. A refrigeration device, characterized in that: Comprising the compressor as claimed in claim 9.

Images