Cylinder head assembly, compressor and refrigeration equipment

Abstract

The cylinder head assembly comprises a cylinder cover and a cylinder sleeve, the cylinder sleeve is provided with a through cylinder hole, the cylinder cover comprises a cylinder cover body, the cylinder cover body is arranged at one end of the cylinder sleeve, the cylinder cover body is provided with a sleeve extending in the direction of the cylinder hole, and the sleeve is arranged in the cylinder hole. The sleeve is arranged on the outer side of the cylinder sleeve in a sleeving mode, the cylinder sleeve is arranged in the sleeve, and the cylinder cover body and the sleeve are integrally made of plastic. According to the technical scheme, the cylinder cover comprises the cylinder cover body and the sleeve, the cylinder cover body and the sleeve are integrally made of plastics, the sleeve is arranged on the outer side of the cylinder sleeve in a sleeving mode, the plastic materials of the cylinder cover body and the sleeve enable the cylinder cover body and the sleeve to have good heat insulation performance, and heat of high-temperature gas in an exhaust channel is prevented from being transmitted into the compressor shell; inspiration overheating of the compressor is effectively reduced, and the refrigerating capacity and performance coefficient of the compressor are improved.

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. The movement consists of a motor component and a pump body. The pump body is equipped with a cylinder head component and a cylinder seat. The cylinder head component is usually square, and the parts mainly include: cylinder head, cylinder head gasket, intake silencer, valve component, cylinder head screw, exhaust silencer, etc., of which there are four cylinder head screws, which fix the valve component and other parts on the plate surface of the cylinder seat. Usually, the cylinder head is made of aluminum alloy, the exhaust silencer is made of gray iron or stainless steel, and the cylinder seat is made of gray cast iron, and their thermal conductivity coefficients are all very high.

[0003] 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 gas converges to the top dead center of the cylinder bore of the cylinder seat, forming a strong heat conduction to the wall around the cylinder bore; when the pressure in the cylinder bore rises to a high enough level, the high-temperature and high-pressure refrigerant gas 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. There is a strong heat conduction in the whole process. The heat is conducted to the space inside the compressor shell. After heat conduction and convection heat exchange, the harmful heat is absorbed by the refrigerant gas in the internal cavity of the shell, forming a strong overheating effect, which leads to an increase in the suction temperature of the compressor, forming harmful suction overheating, seriously affecting the suction efficiency of the compressor, and reducing the cooling capacity and performance coefficient of the compressor. Summary of the invention

[0004] 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.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] In a first aspect, a cylinder head assembly includes a cylinder cover and a cylinder liner, wherein the cylinder liner is provided with a cylinder hole extending therethrough, and the cylinder cover includes a cylinder cover body, wherein the cylinder cover body is arranged at one end of the cylinder liner, and the cylinder cover body has a sleeve extending along the cylinder hole, wherein the sleeve is sleeved on the outside of the cylinder liner, and the cylinder liner is arranged inside the sleeve, and the cylinder cover body and the sleeve are made of plastic in one piece.

[0007] In combination with the first aspect, in certain implementations of the first aspect, a plurality of positioning blocks are provided on the outer wall surface of the cylinder liner, the sleeve is provided with guide grooves at corresponding positions of the positioning blocks, the cylinder head assembly also includes a bracket, the bracket is provided with a cylinder liner positioning portion, the cylinder liner positioning portion of the bracket forms a cylinder liner positioning groove, the sleeve is arranged in the cylinder liner positioning groove, the cylinder liner positioning portion is provided with a cylinder liner positioning groove, the positioning block passes through the guide groove and is clamped into the cylinder liner positioning groove, and a clamping component is provided on the back side of the cylinder head body, the clamping component is connected to the bracket, and presses the cylinder head and cylinder liner to the bracket.

[0008] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the sleeve is provided with a heat insulation plate on both sides of the guide groove to separate the positioning block and the bracket.

[0009] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the cylinder liner positioning portion is provided with a plurality of screw mounting holes, the cylinder head is provided with a plurality of positioning rings, and the clamping component is connected to the screw mounting holes by screws passing through the positioning rings.

[0010] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the cylinder head body is provided with a valve component support surface on the side facing the cylinder liner, and the cylinder head assembly also includes a valve component, and the valve component is arranged between the cylinder liner and the valve component support surface, and is pressed against the valve component support surface through the cylinder liner.

[0011] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the guide groove extends from the end of the sleeve to the support surface of the air valve component, and the edge of the air valve component is provided with a positioning wing that cooperates with the guide groove.

[0012] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the cylinder liner positioning portion includes a first cylinder liner positioning wing and a second cylinder liner positioning wing, the bottoms of the first cylinder liner positioning wing and the second cylinder liner positioning wing are connected, a U-shaped cylinder liner positioning groove is formed between the first cylinder liner positioning wing and the second cylinder liner positioning wing, the cylinder liner positioning groove is arranged on the first cylinder liner positioning wing and the second cylinder liner positioning wing, and the cylinder liner positioning groove forms an opening at a side edge facing the clamping component.

[0013] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, an exhaust muffler is further included, and the exhaust muffler, the cylinder head body and the sleeve are made of plastic in one piece.

[0014] In a second aspect, a compressor comprises the cylinder head assembly described in any implementation manner in the first aspect.

[0015] In a third aspect, a refrigeration device comprises the compressor described in any implementation of the second aspect.

[0016] 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 includes a cylinder head body and a sleeve, the cylinder head body and the sleeve are made of plastic in one piece, the sleeve is sleeved on the outside of the cylinder sleeve, and the plastic material of the cylinder head body and the sleeve gives it good thermal insulation performance, avoiding the transfer of heat from the high-temperature gas in the exhaust channel to the inside of the compressor casing, effectively reducing the compressor suction overheating, and improving the compressor cooling capacity and performance coefficient.

[0017] 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

[0018] 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:

[0019] Figure 1 It is a schematic structural diagram of an embodiment of a cylinder head assembly of the present invention;

[0020] Figure 2 1 is a schematic diagram of the cylinder sleeve structure of an embodiment of a cylinder head assembly of the present invention;

[0021] Figure 3 It is a schematic diagram of an integrated structure of an exhaust muffler, a cylinder head body and a sleeve in one embodiment of a cylinder head assembly of the present invention;

[0022] Figure 4 It is a schematic diagram of a support structure of an embodiment of a cylinder head assembly of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the gas valve component of an embodiment of the cylinder head assembly of the present invention;

[0024] Figure 6 It is a schematic diagram of the exploded structure of a gas valve component of an embodiment of a cylinder head assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the assembly structure of an embodiment of a cylinder head assembly of the present invention. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] See also Figure 1 , Figure 2 , Figure 3 and Figure 7 The embodiment of the present invention provides a cylinder head assembly, including a cylinder head 100 and a cylinder sleeve 200. The cylinder sleeve 200 is provided with a through cylinder hole 201, and the cylinder hole 201 is used to cooperate with the piston to realize the reciprocating compression of the refrigerant. The cylinder head 100 includes a cylinder head body 101, and the cylinder head body 101 is arranged at one end of the cylinder sleeve 200. The cylinder head body 101 has a sleeve 102 extending along the cylinder hole 201. The sleeve 102 is sleeved on the outside of the cylinder sleeve 200, and the cylinder sleeve 200 is arranged inside the sleeve 102. The cylinder head body 101 and the sleeve 102 are made of plastic in one piece. The technical solution of the present invention uses the plastic cylinder head body 101 and the sleeve 102 thereon to wrap the entire cylinder hole 201, which plays a role of heat insulation and avoids harmful heat conduction and heat convection.

[0031] In the technical solution of the present invention, the cylinder head 100 includes a cylinder head body 101 and a sleeve 102. The cylinder head body 101 and the sleeve 102 are made of plastic in one piece, such as glass fiber reinforced nylon material, and have good thermal insulation performance. The sleeve 102 is sleeved on the outside of the cylinder liner 200. The plastic material of the cylinder head body 101 and the sleeve 102 makes it have good thermal insulation performance, which avoids the transfer of heat from the high-temperature gas in the exhaust channel to the inside of the compressor casing, effectively reduces the compressor suction overheating, and improves the compressor cooling capacity and performance coefficient.

[0032] In some embodiments, see Figure 1-Figure 4 and Figure 7 The outer wall of the cylinder sleeve 200 is provided with a plurality of positioning blocks 202, for example Figure 2 In the illustrated embodiment, the outer wall surface of the cylinder liner 200 is provided with a first positioning block and a second positioning block which are symmetrically distributed, and the sleeve 102 is provided with a guide groove 103 at the corresponding position of the positioning block 202. The sleeve 102 can avoid the positioning block 202 through the guide groove 103 and be completely sleeved on the outside of the cylinder liner 200. After the cylinder liner 200 is installed into the sleeve 102 of the cylinder head 100, the high-temperature cylinder liner 200 is prevented from contacting the low-temperature compressor inner cavity gas, thereby avoiding harmful heat exchange, greatly improving the compressor suction overheating, and improving the compressor cooling capacity and performance.

[0033] The cylinder head assembly also includes a bracket 300, the bracket 300 is provided with a cylinder liner positioning portion 301 and a crankshaft positioning portion 302, the crankshaft positioning portion 302 is provided with a shaft sleeve 303, the shaft sleeve 303 is used to assemble the crankshaft of the compressor, the cylinder liner positioning portion 301 of the bracket 300 forms a cylinder liner positioning groove 304, the sleeve 102 is arranged in the cylinder liner positioning groove 304, the cylinder liner positioning portion 301 is provided with a cylinder liner positioning groove 304, the positioning block 202 passes through the guide groove and is clamped into the cylinder liner positioning groove 304, and the back side of the cylinder head body 101 is provided with a clamping component 400, the clamping component 400 is connected to the bracket 300, and the cylinder head 100 and the cylinder liner 200 are pressed against the bracket 300. This embodiment cleverly uses the cylinder liner positioning groove 304 on the bracket 300 to position and install the cylinder head 100 and the cylinder liner 200; and cleverly uses the guide groove 103 on the sleeve 102 of the cylinder head 100 to position and install the cylinder liner 200. The overall design process is simple and has good thermal insulation performance. The isolation effect of the sleeve 102 prevents heat from being conducted from the high-temperature cylinder head and valve components, greatly improving the compressor suction overheating and greatly improving the compressor cooling capacity and performance.

[0034] Further, see Figure 1 , Figure 3The sleeve 102 is provided with a heat insulation plate 104 on both sides of the guide groove 103 to separate the positioning block 202 and the bracket 300, which is used to separate the positioning block 202 and the bracket 300 to avoid direct heat conduction between the cylinder sleeve 200 and the bracket 300, and further improve the thermal insulation performance. At the same time, the heat insulation plate 104 and the sleeve 102 are made of plastic in one piece, and the heat insulation plate 104 can provide better circumferential positioning for the positioning block 202.

[0035] The clamping component 400 and the bracket 300 can be connected by welding, screw connection, riveting, snap connection, etc.

[0036] In some embodiments, see Figure 1 , Figure 3 and Figure 4 The cylinder liner positioning portion 301 is provided with a plurality of screw mounting holes 305, and the cylinder head 100 is provided with a plurality of positioning rings 105. The clamping component 400 is connected to the screw mounting holes 305 by screws passing through the positioning rings 105. In this embodiment, the positioning rings 105 are connected to the bracket while pressing the cylinder head 100 against the bracket from the back side. At the same time, the positioning rings 105 are used to further ensure the installation accuracy and stability of the cylinder head 100.

[0037] In some embodiments, see Figure 3 The cylinder head body 101 is provided with a valve component support surface 106 on the side facing the cylinder liner 200, and the cylinder head assembly also includes a valve component, which is arranged between the cylinder liner 200 and the valve component support surface 106, and is pressed against the valve component support surface 106 through the cylinder liner 200. After the valve component is installed in the sleeve 102 of the cylinder head 100, the high-temperature valve component is prevented from contacting with the low-temperature compressor inner cavity gas, avoiding harmful heat exchange, greatly improving the compressor suction overheating, and improving the compressor cooling capacity and performance.

[0038] Further, see Figure 3 , Figure 5 , Figure 6 , the guide groove 103 extends from the end of the sleeve 102 to the valve component support surface 106, and the edge of the valve component is provided with a positioning wing 107 that cooperates with the guide groove 103. For example, in some embodiments, the valve component includes a gasket 108, an intake valve plate 109, a valve plate 110 and an exhaust valve plate 111. The exhaust valve plate 111 is fixed to the valve plate 110 by laser welding. The gasket 108, the intake valve plate 109 and the valve plate 110 are all provided with positioning wings 107, which are used to guide the valve component to be correctly assembled on the valve component support surface 106 in the cylinder head 100 component, and then pressed by the cylinder liner 200.

[0039] The bracket 300 can be made by casting or by welding, stamping or bending metal plates. In some embodiments, see Figure 1 , Figure 4The cylinder liner positioning portion 301 includes a first cylinder liner positioning wing and a second cylinder liner positioning wing, the bottoms of the first cylinder liner positioning wing and the second cylinder liner positioning wing are connected, a U-shaped cylinder liner positioning groove 304 is formed between the first cylinder liner positioning wing and the second cylinder liner positioning wing, the sleeve 102 is arranged in the cylinder liner positioning groove 304 from the top, the cylinder liner positioning groove 304 is arranged in the first cylinder liner positioning wing and the second cylinder liner positioning wing, and the cylinder liner positioning groove 304 forms an opening at a side edge facing the clamping component 400.

[0040] See also Figure 7 In some embodiments of the present invention, during the assembly process, the first step is to embed the valve component into the sleeve 102 with the guide groove 103 of the sleeve 102 as a guide, and use the positioning wings 107 for positioning to ensure the correct assembly relationship. The second step is to embed the cylinder sleeve 200 into the sleeve 102 with the guide groove 103 of the sleeve 102 as a guide, and use the positioning block 202 for positioning. Under the action of the screw torque, the cylinder head 100, the valve component and the cylinder sleeve 200 are pressed against the bracket 300, and the main support force point is the contact surface between the positioning block 202 of the cylinder sleeve 200 and the bottom of the cylinder sleeve positioning groove 304 of the bracket 300.

[0041] After assembly is completed, the sleeve 102 separates the cylinder liner 200 from the cylinder liner positioning groove 304 of the bracket 300, avoiding the high-temperature cylinder liner 200 from contacting the cylinder liner positioning groove 304 of the bracket 300, thereby avoiding harmful heat exchange, greatly improving the compressor suction overheating, and improving the compressor cooling capacity and performance.

[0042] In some embodiments, see Figure 3 The cylinder head assembly also includes an exhaust muffler 500. The exhaust muffler 500, the cylinder head body 101 and the sleeve 102 are made of plastic in one piece. The exhaust muffler 500 is connected to the cylinder head body 101. The compressed refrigerant discharged from the valve component is introduced into the exhaust muffler 500 through the cylinder head body 101. The exhaust muffler 500, the cylinder head body 101 and the sleeve 102 are made of plastic, which avoids heat conduction from the high-temperature cylinder head 100, the valve component and the exhaust muffler 500, greatly improves the compressor suction overheating, and greatly improves the compressor cooling capacity and performance.

[0043] The present invention also provides a compressor, comprising the cylinder head assembly in any one of the above embodiments.

[0044] The present invention also provides a refrigeration device, comprising the compressor in any one of the above embodiments.

[0045] 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.

[0046] 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 invention comprises a cylinder head and a cylinder liner, wherein the cylinder liner is provided with a cylinder hole extending therethrough, and the cylinder head comprises a cylinder head body, wherein the cylinder head body is arranged at one end of the cylinder liner, the cylinder head body has a sleeve extending along the cylinder hole, the sleeve is sleeved on the outside of the cylinder liner, and the cylinder liner is arranged inside the sleeve, and the cylinder head body and the sleeve are made of plastic in one piece.

2. The cylinder head assembly according to claim 1, characterized in that: The outer wall surface of the cylinder liner is provided with a plurality of positioning blocks, and the sleeve is provided with guide grooves at corresponding positions of the positioning blocks. The cylinder head assembly also includes a bracket, and the bracket is provided with a cylinder liner positioning portion. The cylinder liner positioning portion of the bracket forms a cylinder liner positioning groove, and the sleeve is arranged in the cylinder liner positioning groove. The cylinder liner positioning portion is provided with a cylinder liner positioning groove, and the positioning block passes through the guide groove and is clamped into the cylinder liner positioning groove. A clamping component is provided on the back side of the cylinder head body, and the clamping component is connected to the bracket and presses the cylinder head and the cylinder liner to the bracket.

3. The cylinder head assembly according to claim 2, characterized in that: The sleeve is provided with heat insulation plates on both sides of the guide groove to separate the positioning block and the bracket.

4. The cylinder head assembly according to claim 2, characterized in that: The cylinder sleeve positioning portion is provided with a plurality of screw mounting holes, the cylinder head is provided with a plurality of positioning rings, and the clamping component is connected to the screw mounting holes by screws passing through the positioning rings.

5. The cylinder head assembly according to claim 2, characterized in that: The cylinder head body is provided with a valve component support surface on a side facing the cylinder liner. The cylinder head assembly also includes a valve component. The valve component is arranged between the cylinder liner and the valve component support surface and is pressed against the valve component support surface through the cylinder liner.

6. The cylinder head assembly according to claim 5, characterized in that: The guide groove extends from the end of the sleeve to the supporting surface of the air valve component, and the edge of the air valve component is provided with a positioning wing matched with the guide groove.

7. The cylinder head assembly according to claim 2, characterized in that: The cylinder liner positioning portion includes a first cylinder liner positioning wing and a second cylinder liner positioning wing, the first cylinder liner positioning wing and the second cylinder liner positioning wing are connected at the bottom, a U-shaped cylinder liner positioning groove is formed between the first cylinder liner positioning wing and the second cylinder liner positioning wing, the cylinder liner positioning groove is arranged on the first cylinder liner positioning wing and the second cylinder liner positioning wing, and the cylinder liner positioning groove forms an opening at a side edge facing the clamping component.

8. The cylinder head assembly according to claim 1, characterized in that: It also includes an exhaust muffler, and the exhaust muffler, the cylinder head body and the sleeve are made of plastic in one piece.

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.

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