A cylinder head assembly, a compressor, and a refrigeration device

Abstract

The present invention discloses a cylinder head assembly, a compressor and a refrigeration device, which includes a cylinder head cover and a cylinder liner. The cylinder liner is provided with a through cylinder bore. The cylinder head cover includes a cylinder head cover body, and the cylinder head cover body is disposed at one end of the cylinder liner. The cylinder head cover body has a sleeve extending along the direction of the cylinder bore. The sleeve is sleeved on the outer side of the cylinder liner, and the cylinder liner is disposed inside the sleeve. The cylinder head cover body and the sleeve are integrally made of plastic. In the technical solution of the present invention, the cylinder head cover includes a cylinder head cover body and a sleeve, and the cylinder head cover body and the sleeve are integrally made of plastic. The sleeve is sleeved on the outer side of the cylinder liner. The plastic material of the cylinder head cover body and the sleeve enables it to have good heat insulation performance, avoiding the transfer of heat of high-temperature gas in the exhaust passage to the inside of the compressor housing, effectively reducing the superheat of the compressor suction, and improving the refrigerating capacity and coefficient of performance of the compressor.

Description

Technical Field

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

[0002] A household refrigerator compressor generally includes a core and a housing. The core is composed of a motor component and a pump body. The pump body is provided with a cylinder head component and a cylinder block. The cylinder head component is usually square, and its parts mainly include: a cylinder head, a cylinder head gasket, a suction muffler, a valve component, cylinder head screws, an exhaust muffler, etc. Among them, the number of cylinder head screws is four, which fix components such as the valve component on the plate surface of the cylinder block. Usually, the cylinder head is made of aluminum alloy, the exhaust muffler is made of gray iron or stainless steel, and the cylinder block is made of gray cast iron, and their thermal conductivity coefficients are all very high.

[0003] A household refrigerator compressor is mainly a reciprocating piston compressor. One of the characteristics of a reciprocating compressor is that the compression ratio is very large. Therefore, the temperature of the refrigerant is very high after being compressed in the cylinder. The high-temperature refrigerant gas converges to the top dead center of the cylinder bore of the cylinder block, forming strong heat conduction to the wall surface 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 strong heat conduction throughout the process, and the heat is conducted into the space inside the compressor housing. Through heat conduction and convective heat transfer, the harmful heat is absorbed by the refrigerant gas in the internal cavity of the housing, forming a strong overheating effect, which causes the suction temperature of the compressor to rise, forming harmful suction overheating, seriously affecting the suction efficiency of the compressor, and reducing the refrigerating capacity and coefficient of performance of the compressor. Summary of the Invention

[0004] An object 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 problems is:

[0006] In a first aspect, a cylinder head assembly includes a cylinder head and a cylinder liner. The cylinder liner is provided with a through cylinder bore. The cylinder head includes a cylinder head body, the cylinder head body is disposed at one end of the cylinder liner, the cylinder head body has a sleeve extending along the direction of the cylinder bore, the sleeve is sleeved outside the cylinder liner, the cylinder liner is disposed inside the sleeve, and the cylinder head body and the sleeve are integrally made of plastic.

[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. Guide grooves are provided at corresponding positions of the positioning blocks on the sleeve. The cylinder head assembly further 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 installation groove. The sleeve is disposed in the cylinder liner installation groove. The cylinder liner positioning portion is provided with a cylinder liner positioning groove. The positioning blocks pass through the guiding grooves and are snapped into the cylinder liner positioning grooves. A clamping member is provided on the back side of the cylinder head body. The clamping member is connected to the bracket and presses the cylinder head and the cylinder liner against the bracket.

[0008] In combination with the first aspect and the above implementation, in certain implementations of the first aspect, heat insulation plates that separate the positioning blocks and the bracket are provided on both sides of the guiding grooves on the sleeve.

[0009] In combination with the first aspect and the above implementation, 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. The clamping member is connected to the screw mounting holes by screws passing through the positioning rings.

[0010] In combination with the first aspect and the above implementation, in certain implementations of the first aspect, a valve component support surface is provided on the side of the cylinder head body facing the cylinder liner. The cylinder head assembly further includes a valve component. The valve component is disposed between the cylinder liner and the valve component support surface and is pressed against the valve component support surface by the cylinder liner.

[0011] In combination with the first aspect and the above implementation, in certain implementations of the first aspect, the guiding grooves extend from the end of the sleeve to the valve component support surface. A positioning wing that cooperates with the guiding grooves is provided at the edge of the valve component.

[0012] In combination with the first aspect and the above implementation, 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 installation groove is formed between the first cylinder liner positioning wing and the second cylinder liner positioning wing. The cylinder liner positioning grooves are provided on the first cylinder liner positioning wing and the second cylinder liner positioning wing. The cylinder liner positioning grooves form openings at the edge on the side facing the clamping member.

[0013] In combination with the first aspect and the above implementation, in certain implementations of the first aspect, an exhaust muffler is further included. The exhaust muffler, the cylinder head body, and the sleeve are integrally made of plastic.

[0014] In a second aspect, a compressor includes the cylinder head assembly according to any one of the implementations in the first aspect.

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

[0016] One of the technical solutions in 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 integrally made of plastic. The sleeve is sleeved on the outside of the cylinder liner. The plastic material of the cylinder head body and the sleeve gives it good heat insulation performance, avoiding the transfer of heat of the high-temperature gas in the exhaust passage to the inside of the compressor housing, effectively reducing the suction superheat of the compressor, and improving the refrigerating capacity and coefficient of performance of the compressor.

[0017] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

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

[0020] Figure 2 is a schematic structural diagram of a cylinder liner of an embodiment of the cylinder head assembly of the present invention;

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

[0022] Figure 4 is a schematic structural diagram of a bracket of an embodiment of the cylinder head assembly of the present invention;

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

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

[0025] Figure 7 is a schematic assembly structural diagram of an embodiment of the cylinder head assembly of the present invention. Detailed Embodiments

[0026] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0027] In the present invention, when 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, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0028] In the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and "greater than", "less than", "exceeding", etc. are understood not to include the recited number; "above", "below", "within", etc. are understood to include the recited number. In the description of the present invention, if "first" and "second" are described, they are only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the present invention, unless otherwise clearly defined, terms such as "arranged", "installed", "connected", etc. 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 capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] See Figure 1 , Figure 2 , Figure 3 and Figure 7 , embodiments of the present invention provide a cylinder head assembly, including a cylinder head 100 and a cylinder liner 200. The cylinder liner 200 is provided with a through cylinder bore 201 for cooperating with a piston to achieve reciprocating compression of a refrigerant. The cylinder head 100 includes a cylinder head body 101. The cylinder head body 101 is arranged at one end of the cylinder liner 200. The cylinder head body 101 has a sleeve 102 extending along the direction of the cylinder bore 201. The sleeve 102 is sleeved outside the cylinder liner 200, and the cylinder liner 200 is arranged inside the sleeve 102. The cylinder head body 101 and the sleeve 102 are integrally made of plastic. The technical solution of the present invention uses the plastic cylinder head body 101 and the sleeve 102 thereon to wrap the entire cylinder bore 201, playing a role of heat insulation and avoiding 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 integrally made of plastic, such as glass fiber-reinforced nylon material, which has good heat insulation performance. The sleeve 102 is sleeved outside the cylinder liner 200. The plastic material of the cylinder head body 101 and the sleeve 102 enables it to have good heat insulation performance, avoiding the transfer of heat of high-temperature gas in the exhaust passage to the inside of the compressor housing, effectively reducing the superheat of the compressor suction, and improving the refrigerating capacity and coefficient of performance of the compressor.

[0032] In some embodiments, referring to Figures 1-4 and Figure 7 , a plurality of positioning blocks 202 are provided on the outer wall surface of the cylinder liner 200. For example, in the embodiment shown in Figure 2 , a first positioning block and a second positioning block are symmetrically distributed on the outer wall surface of the cylinder liner 200. A guide groove 103 is provided at the corresponding position of the sleeve 102 for the positioning block 202. The sleeve 102 can avoid the positioning block 202 through the guide groove 103 and be completely sleeved outside the cylinder liner 200. After the cylinder liner 200 is installed in the sleeve 102 of the cylinder head 100, it avoids the contact between the high-temperature cylinder liner 200 and the low-temperature gas in the compressor inner cavity, avoids harmful heat exchange, greatly improves the superheat of the compressor suction, and improves the refrigerating capacity and performance of the compressor.

[0033] The cylinder head assembly further 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 bushing 303 for assembling the crankshaft of the compressor. The cylinder liner positioning portion 301 of the bracket 300 forms a cylinder liner installation groove 304. The sleeve 102 is arranged in the cylinder liner installation groove 304. The cylinder liner positioning portion 301 is provided with a cylinder liner positioning groove. The positioning block 202 passes through the guiding groove and is clamped into the cylinder liner positioning groove. A clamping member 400 is provided on the back side of the cylinder head body 101. The clamping member 400 is connected to the bracket 300 and presses the cylinder head 100 and the cylinder liner 200 against the bracket 300. In this embodiment, the cylinder liner positioning groove 304 on the bracket 300 is cleverly used to position and install the cylinder head 100 and the cylinder liner 200; and the guiding groove 103 on the sleeve 102 of the cylinder head 100 is also cleverly used to position and install the cylinder liner 200. The overall design process is simple and has good heat insulation performance. Due to the isolation effect of the sleeve 102, the heat conduction from the high-temperature cylinder head and valve components is avoided, greatly improving the superheat of the compressor suction and greatly enhancing the refrigerating capacity and performance of the compressor.

[0034] Furthermore, referring to Figure 1 , Figure 3, on both sides of the guide groove 103 of the sleeve 102, there is a heat insulation plate 104 that separates the positioning block 202 and the bracket 300, which is used to separate the positioning block 202 from the bracket 300, avoid direct heat conduction between the cylinder liner 200 and the bracket 300, and further improve the heat insulation performance. At the same time, the heat insulation plate 104 and the sleeve 102 are integrally made of plastic, 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 and other methods.

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

[0037] In some embodiments, refer to Figure 3 , on the side of the cylinder head body 101 facing the cylinder liner 200, there is a valve component support surface 106. The cylinder head assembly further includes a valve component, and the valve component is arranged between the cylinder liner 200 and the valve component support surface 106 and is pressed against the valve component support surface 106 by the cylinder liner 200. After the valve component is installed into the sleeve 102 of the cylinder head 100, it avoids the contact between the high-temperature valve component and the low-temperature compressor inner cavity gas, avoids harmful heat exchange, greatly improves the compressor suction superheat, and improves the compressor cooling capacity and performance.

[0038] Furthermore, refer to 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, a suction valve plate 109, a valve plate 110 and an exhaust valve plate 111. Among them, the exhaust valve plate 111 is fixed on the valve plate 110 by laser welding. The gasket 108, the suction valve plate 109 and the valve plate 110 are all provided with positioning wings 107, which are used to guide the correct assembly of the valve component on the valve component support surface 106 inside the cylinder head 100 component and then be pressed by the cylinder liner 200.

[0039] The bracket 300 can be made by casting or by welding, stamping or bending a metal plate. In some embodiments, refer to Figure 1 , Figure 4, the 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 installation 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 installation groove 304 from the top. Cylinder liner positioning grooves are arranged on the first cylinder liner positioning wing and the second cylinder liner positioning wing, and the cylinder liner positioning grooves form openings on the side edges facing the clamping member 400.

[0040] See Figure 7 , in some embodiments of the present invention during the assembly process, in the first step, guided by the guide groove 103 of the sleeve 102, the valve component is embedded into the sleeve 102, and the positioning wing 107 is used for positioning to ensure the correct assembly relationship. In the second step, guided by the guide groove 103 of the sleeve 102, the cylinder liner 200 is embedded into the sleeve 102, and the positioning block 202 is used for positioning. Under the action of the screw torque, the cylinder head 100, the valve component, and the cylinder liner 200 are pressed on the bracket 300, and the main supporting stress points are the contact surfaces between the positioning block 202 of the cylinder liner 200 and the bottom of the cylinder liner positioning groove of the bracket 300.

[0041] After the assembly is completed, the sleeve 102 separates the cylinder liner 200 from the cylinder liner installation groove 304 of the bracket 300, avoiding the contact between the high-temperature cylinder liner 200 and the cylinder liner installation groove 304 of the bracket 300. Therefore, harmful heat exchange is avoided, greatly improving the superheat of the compressor suction and enhancing the cooling capacity and performance of the compressor.

[0042] In some embodiments, see Figure 3 , the cylinder head assembly further includes an exhaust muffler 500. The exhaust muffler 500, the cylinder head body 101, and the sleeve 102 are integrally made of plastic. 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, avoiding the heat conduction from the high-temperature cylinder head 100, valve component, and exhaust muffler 500, greatly improving the superheat of the compressor suction and significantly enhancing the cooling capacity and performance of the compressor.

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

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

[0045] In the description of this specification, the descriptions referring to terms such as "example", "embodiment" or "some embodiments" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A cylinder head assembly, characterized in that: The cylinder head assembly comprises a cylinder head and a cylinder sleeve, wherein the cylinder sleeve is provided with a cylinder hole penetrating therethrough, the cylinder head comprises a cylinder head body, the cylinder head body is arranged at one end of the cylinder sleeve, the cylinder head body has a sleeve extending along the cylinder hole direction, the sleeve is sleeved on the outer side of the cylinder sleeve, and the cylinder sleeve is arranged inside the sleeve, the cylinder head body and the sleeve are made of plastic as a whole, the outer wall surface of the cylinder sleeve is provided with a plurality of positioning blocks, the sleeve is provided with a guide groove at the corresponding position of the positioning block, the cylinder head assembly also comprises a bracket, the bracket is provided with a cylinder sleeve positioning part, the cylinder sleeve positioning part of the bracket forms a cylinder sleeve mounting groove, the sleeve is arranged in the cylinder sleeve mounting groove, the cylinder sleeve positioning part is provided with a cylinder sleeve positioning groove, the positioning block passes through the guide groove and is clamped in the cylinder sleeve 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 the cylinder sleeve to the bracket.

2. The cylinder head assembly according to claim 1, 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.

3. The cylinder head assembly according to claim 1, 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.

4. The cylinder head assembly according to claim 1, 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.

5. The cylinder head assembly according to claim 4, 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.

6. The cylinder head assembly according to claim 1, 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 mounting 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.

7. 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.

8. A compressor, characterized in that: A cylinder head assembly comprising any one of claims 1 to 7.

9. A refrigeration device, characterized in that: Comprising the compressor as claimed in claim 8.

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