Heat insulation structure of compressor

Abstract

The heat insulation structure of the compressor comprises an air cylinder, a cylinder cover and a silencer, the cylinder cover comprises an air storage cavity and an installation cavity, an air outlet portion of the silencer is located in the installation cavity, the cylinder cover is installed on the air cylinder, and an air outlet in the air outlet portion of the silencer is in butt joint with an air inlet of the air cylinder. An air outlet pipe and an air outlet of the silencer are located in the middle of the air outlet portion, heat insulation grooves are formed between the air outlet pipe and the periphery of the air outlet portion and between the air outlet pipe and the periphery of the air outlet portion and between the air outlet and the periphery of the air outlet portion, and the air outlet portion is pressed and fixed to the air cylinder through the cylinder cover through a pressing plate and a blocking strip on the inner wall of the installation cavity. The heat insulation groove is formed in the periphery of the air outlet portion of the silencer, the heat conduction area between the air outlet pipe in the middle and the installation cavity and between the air outlet and the installation cavity can be reduced, and therefore heat transmitted to the air outlet of the silencer is greatly reduced, the density of refrigerant gas in the air suction process is improved, and the refrigerating capacity and the refrigerating efficiency of a compressor are improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor heat insulation structure. Background Technology

[0002] Current refrigerator compressors mainly consist of four processes: suction, compression, exhaust, and expansion. Specifically... Figure 1 As shown, low-temperature, low-pressure refrigerant gas is first drawn in through the intake port 39 of the muffler 3, then passes sequentially through the outlet port 32 of the muffler 3, the cylinder head gasket 4, and the through holes on the valve plate 5, before entering the cylinder 1 of the compressor and being compressed into high-temperature, high-pressure refrigerant. Finally, the refrigerant is discharged into the gas storage chamber 21 of the cylinder head 2. Because the outlet 31 of the muffler 3 is enclosed inside the cylinder head 2 and pressed by the fixing clamp 6, the periphery of the outlet 31 contacts the cylinder head 2. This causes the high-temperature gas in the gas storage chamber 21 to transfer heat to the outlet port 32 of the muffler 3, the cylinder head gasket 4, and the valve plate 5 through the fixing clamp 6 and the contact surface between the outlet 31 and the cylinder head 2, causing its temperature to rise significantly. This results in an increase in the temperature and a decrease in the density of the passing low-temperature refrigerant gas, leading to a decrease in the intake flow rate, which in turn causes a decrease in cooling capacity and a reduction in compressor efficiency. Utility Model Content

[0003] To overcome the aforementioned shortcomings of existing compressors, the technical problem to be solved by this utility model is to provide a compressor insulation structure that can reduce heat transfer and improve compressor efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] The compressor heat insulation structure includes a cylinder, a cylinder head, and a muffler. The cylinder head includes an air storage chamber and a mounting chamber. The air outlet of the muffler is located in the mounting chamber. The cylinder head is mounted on the cylinder, so that the air outlet of the muffler is aligned with the air inlet of the cylinder, and the air storage chamber is connected to the air outlet of the cylinder. The air outlet pipe and air outlet of the muffler are located in the middle of the air outlet. A heat insulation groove is provided between the air outlet pipe and air outlet and the periphery of the air outlet. A pressure plate is provided on the inner wall of each side of the mounting chamber. A baffle is provided at the notch of the mounting chamber. The cylinder head presses and fixes the air outlet onto the cylinder by contacting the back of the air outlet with the pressure plate and the baffle.

[0006] Furthermore, the air outlet has a wider head and a narrower neck, the shape of the mounting cavity is adapted to the air outlet, the pressure plate inside the mounting cavity contacts the two sides of the head of the air outlet, and the baffle contacts the back of the neck of the air outlet.

[0007] Furthermore, the back of the neck of the air outlet extends beyond the back of the head, and a hollow groove is provided on the stepped surface between the neck and the head, the hollow groove being connected to the heat insulation groove around the neck.

[0008] Furthermore, the mounting cavity of the cylinder head extends through both the front and rear surfaces of the cylinder head.

[0009] Furthermore, a cylinder head gasket and a valve plate are provided between the exhaust section of the muffler and the cylinder. The front side of the cylinder head gasket is provided with a sleeve that can pass through the air intake hole on the valve plate. Heat-insulating rubber pads are provided on both sides of the cylinder head gasket and on the inner and outer sides of the sleeve.

[0010] Furthermore, a sealing rib is provided at the air outlet of the air outlet section, and an annular groove is provided on the back of the cylinder head gasket at the part corresponding to the sleeve, and the sealing rib on the air outlet section is sealed and connected with the annular groove.

[0011] The beneficial effects of this utility model are: by setting heat insulation grooves around the air outlet of the muffler, the heat conduction area between the middle air outlet pipe and the air outlet and the mounting cavity can be reduced, thereby significantly reducing the heat transferred to the air outlet of the muffler, which will not significantly cause the refrigerant to heat up, increasing the density of the refrigerant gas during the suction process, and improving the cooling capacity and cooling efficiency of the compressor. Attached Figure Description

[0012] Figure 1 This is an exploded view of an existing compressor;

[0013] Figure 2 This is an exploded view of the compressor of this utility model;

[0014] Figure 3 This is a schematic diagram of the front structure of the silencer of this utility model;

[0015] Figure 4 This is a schematic diagram of the back structure of the silencer of this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the cylinder head of this utility model;

[0017] Figure 6 This is a front structural diagram of the cylinder head gasket of this utility model;

[0018] Figure 7 This is a schematic diagram of the back structure of the cylinder head gasket of this utility model.

[0019] The markings in the diagram are as follows: 1-Cylinder, 2-Cylinder head, 3-Muffler, 4-Cylinder head gasket, 5-Valve plate, 6-Fixing clamp, 21-Air storage chamber, 22-Mounting chamber, 23-Pressure plate, 24-Baffle, 31-Air outlet, 32-Air outlet port, 33-Air outlet pipe, 34-Heat insulation groove, 35-Head, 36-Neck, 37-Hollow groove, 38-Sealing rib, 39-Air intake port, 41-Sleeve, 42-Annular groove, 51-Air inlet hole. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these are used to describe the relative positional relationships between components and are not specific references to the absolute positions of related components or the positional relationships between components. They are only used to explain the relative positional relationships and movement of components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. If this utility model contains terms related to quantity, such as "many," "multiple," or "several," these specifically refer to two or more.

[0022] like Figure 2-5 As shown, the present invention provides a compressor heat insulation structure, including a cylinder 1, a cylinder head 2, and a muffler 3. The cylinder head 2 includes an air storage chamber 21 and a mounting chamber 22. The air outlet 31 of the muffler 3 is located in the mounting chamber 22. The cylinder head 2 is mounted on the cylinder 1, so that the air outlet 32 ​​on the air outlet 31 of the muffler 3 is connected to the air inlet of the cylinder 1, and the air storage chamber 21 is connected to the exhaust port of the cylinder 1. The air outlet pipe 33 and the air outlet 32 ​​of the muffler 3 are located in the middle of the air outlet 31. A heat insulation groove 34 is provided between the air outlet pipe 33 and the air outlet 32 ​​and the periphery of the air outlet 31. A pressure plate 23 is provided on the inner wall on both sides of the mounting chamber 22. A baffle 24 is provided at the notch of the mounting chamber 22. The cylinder head 2 presses and fixes the air outlet 31 onto the cylinder 1 by contacting the back of the air outlet 31 with the pressure plate 23 and the baffle 24.

[0023] Compared to existing Figure 1 The compressor shown in this invention mainly eliminates the fixing clip 6, reducing one heat transfer path. Additionally, as... Figure 3As shown, this application increases the volume of the exhaust section 31 to allow for the creation of heat insulation grooves 34 around the exhaust section 31 of the muffler 3. The depth of the heat insulation grooves 34 can be comparable to the depth of the exhaust port 32, or it can extend through both sides of the exhaust section 31. The width of the heat insulation grooves 34 is set according to the actual expected space of the mounting cavity 22 in the cylinder head 2. The function of the heat insulation grooves 34 is to reduce the heat conduction area between the exhaust pipe 33 and the exhaust port 32 in the middle and the mounting cavity 22. Because the heat insulation grooves 34 contain gaseous refrigerant, the heat conduction efficiency is lower than that of the plastic of the exhaust section 31 itself. Therefore, it can significantly reduce the heat transferred from the cylinder head 2 to the exhaust pipe 33 and the exhaust port 32 of the muffler 3, without significantly causing the refrigerant to heat up. This increases the density of the refrigerant gas during the intake process, thereby increasing the cooling capacity and cooling efficiency of the compressor.

[0024] like Figure 1 As shown, the muffler 3 of a traditional compressor is mainly confined within the mounting cavity 22 by the positioning strip on the air outlet 31. In this application, after increasing the volume of the air outlet 31, to avoid occupying more space, the air outlet 31 can be designed with a wider head 35 and a narrower neck 36. The shape of the mounting cavity 22 is adapted to the air outlet 31. This structure can directly confine the air outlet 31 within the mounting cavity 22, achieving the installation and positioning of the muffler 3. Furthermore, to ensure that the air outlet 31 is evenly pressed onto the cylinder 1, the pressure plate 23 within the mounting cavity 22 can contact both sides of the head of the air outlet 31, and the baffle 24 can contact the back of the neck 36 of the air outlet 31, as shown in Figure 4. The dimensions of the pressure plate 23 and the baffle 24 should be made as small as possible while ensuring structural strength, and the edge of the pressure plate 23 should preferably not extend into the area of ​​the heat insulation groove 34.

[0025] A further option is, such as Figure 4 As shown, to reduce heat transfer from the baffle 24, this application optimizes the structure of the air outlet 31. The back of the neck 36 of the air outlet 31 extends beyond the back of the head 35, and a hollow groove 37 is provided on the stepped surface between the neck 36 and the head 35. The hollow groove 37 is connected to the heat insulation groove 34 around the neck 36. The hollow groove 37 also adopts a cavity structure to reduce the contact area between the baffle 24 and the air outlet pipe 33, further reducing the heat transferred to the air outlet pipe 33 and the air outlet 32. Compared with the existing structure, in the solution of this application, the area of ​​direct contact between the air outlet 32 ​​and the air outlet pipe 33 and the mounting cavity 22 through their own plastic parts can be reduced by more than 90%, and the cooling efficiency can be improved by more than 3%.

[0026] In addition, to avoid heat accumulation in the mounting cavity 22, the mounting cavity 22 of the cylinder head 2 can be configured to penetrate the front and rear sides of the cylinder head 2, so that the heat in the mounting cavity 22 can be carried away by the flow of gaseous refrigerant, thereby preventing this heat from being transferred to the muffler 3.

[0027] To improve the sealing effect, a cylinder head gasket 4 and a valve plate 5 are also provided between the air outlet 31 of the muffler 3 and the cylinder 1, such as... Figure 6 As shown, the cylinder head gasket 4 has a sleeve 41 on its front side that can pass through the air inlet 51 on the valve plate 5. Specifically, it can be integrally formed with the cylinder head gasket 4 by stamping. Insulating rubber pads are provided on both sides of the cylinder head gasket 4 and on the inner and outer sides of the sleeve 41. In addition to being transferred to the air outlet 32 ​​through the air outlet 31, the heat in the cylinder head 2 is also transferred to the valve plate 5 through the cylinder head gasket 4, thus heating the refrigerant passing through the air inlet 51 on the valve plate 5. This application modifies the traditional metal cylinder head gasket 4 into a structure with insulating rubber pads on both sides of the intermediate metal material, achieving a good heat insulation and sealing effect, reducing the heat transferred from the cylinder head gasket 4 to the valve plate 5. Simultaneously, by using the sleeve 41 on the cylinder head gasket 4 to directly pass through the air inlet 51 on the valve plate 5, the insulating rubber pads can reduce the heat transfer from the valve plate 5 to the refrigerant flowing through its air inlet 51.

[0028] In traditional structures, there is often a large contact area between the exhaust portion 31 and the cylinder head gasket 4, which increases heat transfer. This application only provides a sealing rib 38 at the exhaust port 32 of the exhaust portion 31, and an annular groove 42 is provided on the back of the cylinder head gasket 4 at the location corresponding to the sleeve 41. Figure 7 As shown, the entire air outlet 31 is sealed and connected to the annular groove 42 only through the sealing rib 38 on the air outlet 31, thereby reducing the contact area, improving the sealing effect, and further optimizing the cooling efficiency.

Claims

1. A compressor heat insulation structure, comprising a cylinder (1), a cylinder head (2), and a muffler (3), wherein the cylinder head (2) comprises an air storage chamber (21) and a mounting chamber (22), the air outlet (31) of the muffler (3) is located in the mounting chamber (22), the cylinder head (2) is mounted on the cylinder (1), such that the air outlet (32) on the air outlet (31) of the muffler (3) is connected to the air inlet of the cylinder (1), and the air storage chamber (21) is connected to the exhaust port of the cylinder (1), characterized in that: The exhaust pipe (33) and exhaust port (32) of the muffler (3) are located in the middle of the exhaust section (31). A heat insulation groove (34) is provided between the exhaust pipe (33) and exhaust port (32) and the periphery of the exhaust section (31). A pressure plate (23) is provided on the inner wall of both sides of the mounting cavity (22). A baffle (24) is provided at the notch of the mounting cavity (22). The cylinder head (2) presses and fixes the exhaust section (31) onto the cylinder (1) by contacting the back of the exhaust section (31) with the pressure plate (23) and the baffle (24).

2. The compressor insulation structure as described in claim 1, characterized in that: The air outlet (31) has a wider head (35) and a narrower neck (36). The shape of the mounting cavity (22) is adapted to the air outlet (31). The pressure plate (23) in the mounting cavity (22) contacts the two sides of the head of the air outlet (31), and the baffle (24) contacts the back of the neck (36) of the air outlet (31).

3. The compressor heat insulation structure as described in claim 2, characterized in that: The back of the neck (36) of the air outlet (31) extends beyond the back of the head (35), and a hollow groove (37) is provided on the stepped surface between the neck (36) and the head (35). The hollow groove (37) is connected to the heat insulation groove (34) around the neck (36).

4. The compressor insulation structure as described in claim 1, characterized in that: The mounting cavity (22) of the cylinder head (2) extends through both the front and rear sides of the cylinder head (2).

5. The compressor insulation structure as described in any one of claims 1-4, characterized in that: The muffler (3) is provided with a cylinder head gasket (4) and a valve plate (5) between the air outlet (31) and the cylinder (1). The cylinder head gasket (4) has a sleeve (41) on its front side that can pass through the air inlet (51) on the valve plate (5). The cylinder head gasket (4) and the sleeve (41) are provided with heat insulation pads on both sides of the cylinder head gasket (4) and the inner and outer sides of the sleeve (41).

6. The compressor insulation structure as described in claim 5, characterized in that: The air outlet (31) has a sealing rib (38) at the air outlet (32), and the back of the cylinder head gasket (4) is provided with an annular groove (42) corresponding to the sleeve (41). The sealing rib (38) on the air outlet (31) is sealed and connected with the annular groove (42).

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