Integrated cylinder head for cryogenic refrigerator compressor

Abstract

The present invention relates to the field of compressors, especially compressors for deep-freeze refrigerators. The technical problem to be solved by the present invention is to provide an integrated cylinder head for a deep-freeze refrigerator compressor with better sealing performance. The integrated cylinder head for a deep-freeze refrigerator compressor includes a cylinder head, and also includes a muffler and a muffler connecting plate. The muffler is provided with an air inlet hole, an air outlet interface and a connecting flange. The air inlet hole and the air outlet interface are communicated through a cavity. The inner ring of the connecting flange is communicated with the air outlet interface. The cylinder head is provided with a low-pressure air inlet. The air outlet on the muffler connecting plate is fixedly connected and communicated with the low-pressure air inlet. The connecting flange and the muffler connecting plate are fixedly connected. The air outlet is communicated with the air outlet interface.

Description

Technical Field

[0001] The present invention relates to the field of compressors, especially compressors for deep-freeze refrigerators. Background Art

[0002] In the fields of medical treatment, rapid freezing of food, etc., deep-freeze compressors with low cost and high reliability are gradually being developed. Their refrigeration working medium is a mixed working medium. According to the characteristics of the mixed working medium, it is required to have a low evaporation temperature, the temperature inside the box reaches -60°C to -70°C, and the temperature difference of the working medium entering and leaving the compressor is very large. The operating conditions are more severe than those of household compressors.

[0003] For existing deep-freeze compressors, most of the mufflers are made of plastic. The cylinder head and the compressor body are connected by bolts. The muffler is communicated with the suction port on the cylinder head, and the air outlet interface of the muffler is pressed between the cylinder head and the compressor body. When the compressor works, the working medium enters the muffler from the air inlet hole of the muffler, and then enters the suction port on the cylinder head from the air outlet interface of the muffler. There is a gap between the air inlet of the cylinder head and the air outlet of the muffler. During the suction process of the compressor, this gap is in a negative pressure state, and the refrigerating oil will be sucked into the compressor cylinder bore from this gap and mixed with the refrigeration working medium. During the compression process of the compressor, high-temperature and high-pressure gas-liquid is formed. Then the gas-liquid mixture will enter the muffler from the air inlet hole of the muffler. The high-temperature and high-pressure gas-liquid is likely to melt the outer shell and internal pipes of the muffler, thus damaging the muffler, and further causing the working medium to leak, making the compressor unable to work properly. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an integrated cylinder head for a deep-freeze refrigerator compressor with better sealing performance.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an integrated cylinder head for a deep-freeze refrigerator compressor, including a cylinder head, and further including a muffler and a muffler connecting plate. The muffler is provided with an air inlet hole, an air outlet interface and a connecting flange. The air inlet hole and the air outlet interface are communicated through a cavity. The inner ring of the connecting flange is communicated with the air outlet interface. The cylinder head is provided with a low-pressure air inlet. The air outlet on the muffler connecting plate is fixedly connected and communicated with the low-pressure air inlet. The connecting flange and the muffler connecting plate are fixedly connected, and the air outlet is communicated with the air outlet interface.

[0006] Furthermore, the cavity of the muffler is composed of a left cavity, a middle cavity and a right cavity. A partition plate is provided in the middle cavity, and the middle cavity is divided into an upper cavity and a lower cavity by the partition plate. The upper cavity and the lower cavity are communicated through a pipeline. The left cavity and the right cavity are respectively communicated with the lower cavity through pipelines. An air inlet hole communicated with it is provided on the left cavity or the right cavity, and a pipeline communicated with the air inlet hole is arranged in the left cavity or the right cavity.

[0007] Further, when the air inlet hole is arranged on the right chamber, the distance from the axis of the pipe connecting the left chamber and the middle chamber to the lower surface of the partition is greater than the distance from the axis of the pipe connecting the right chamber and the middle chamber to the lower surface of the partition.

[0008] Further, when the air inlet hole is arranged on the left chamber, the distance from the axis of the pipe connecting the left chamber and the middle chamber to the lower surface of the partition is less than the distance from the axis of the pipe connecting the right chamber and the middle chamber to the lower surface of the partition.

[0009] Further, the upper chamber and the lower chamber are connected through two pipes.

[0010] Further, the absolute value of the difference between the distances from the end faces of the two pipes in the upper chamber to the upper surface of the partition is greater than zero.

[0011] Further, the pipe is a Bundy tube, and the diameter of the Bundy tube is 6.35 mm to 8.00 mm.

[0012] Further, a rib plate is provided between the muffler connecting plate and the cylinder head, and both the muffler connecting plate and the cylinder head are connected to the rib plate.

[0013] Further, buckles are evenly arranged around the connecting flange, and the buckles are in contact with the muffler connecting plate to tighten the connecting flange and the muffler connecting plate.

[0014] Further, the connecting flange and the muffler connecting plate are riveted, and a sealing adhesive material is provided between the connecting flange and the muffler connecting plate.

[0015] The beneficial effects of the present invention are as follows: Compared with the existing connection method between the cylinder head of the compressor and the muffler, the muffler connecting plate is fixedly connected to the cylinder head of the present invention, and the connecting flange on the air outlet interface of the muffler is fixedly connected to the muffler connecting plate, so that the working medium passage of the muffler is communicated with the low-pressure air inlet on the cylinder head, thereby reducing the noise of the working medium before entering the compressor. The connection method of the present invention eliminates the gap between the muffler and the cylinder head, and can effectively avoid the situation that the working medium leaks due to poor sealing, resulting in the compressor not working properly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the structure of the present invention;

[0017] Figure 2 is the schematic structural diagram after the cylinder head and the muffler connecting plate are connected;

[0018] Figure 3 is the schematic structural diagram of the muffler;

[0019] Figure 4 is the axonometric view of the structure of the present invention;

[0020] Parts, components and numbers in the figure: cylinder head 1, muffler connecting plate 101, air outlet 1011, low-pressure air inlet 102, rib plate 103, muffler 2, intermediate cavity 201, partition plate 2011, left cavity 202, right cavity 203, air inlet hole 2031, connecting flange 204, buckle 205, pipe 206. Detailed implementation manners

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Take Figure 1 The up, down, left and right directions shown as the up, down, left and right directions of the corresponding parts.

[0023] As Figure 1 And Figure 4 As shown, the integrated cylinder head for a cryogenic refrigerator compressor includes a cylinder head 1, and also includes a muffler 2 and a muffler connecting plate 101. The muffler 2 is provided with an air inlet hole 2031, an air outlet interface and a connecting flange 204. The air inlet hole 2031 and the air outlet interface are communicated through a cavity. The inner ring of the connecting flange 204 is communicated with the air outlet interface. The cylinder head 1 is provided with a low-pressure air inlet 102. The air outlet 1011 on the muffler connecting plate 101 is fixedly connected and communicated with the low-pressure air inlet 102. The muffler connecting plate 101 and the cylinder head 1 are integrally formed by welding, casting and other methods. The connecting flange 204 and the muffler connecting plate 101 are fixedly connected by welding, screwing, riveting and other methods. The air outlet 1011 is communicated with the air outlet interface.

[0024] In order to achieve good sound insulation effect, the cavity of the muffler 2 is composed of a left cavity 202, an intermediate cavity 201 and a right cavity 203. A partition plate 2011 is provided in the intermediate cavity 201. The partition plate 2011 divides the intermediate cavity 201 into an upper cavity and a lower cavity. The upper cavity and the lower cavity are communicated through a pipe 206. The left cavity 202 and the right cavity 203 are respectively communicated with the lower cavity through a pipe 206. An air inlet hole 2031 communicated therewith is provided on the left cavity 202 or the right cavity 203. A pipe 206 communicated with the air inlet hole 2031 is arranged in the left cavity 202 or the right cavity 203. The partition plate 2011 of the intermediate cavity 201 divides the intermediate cavity into two chambers, namely an upper chamber and a lower chamber. The volume of each chamber is smaller than that of the chamber provided with the air inlet hole 2031. When the compressor operates to inhale air, the intermediate cavity 201 plays a role of expansion, eliminates low-frequency noise, and makes the sound insulation effect better. It is recommended that the whole muffler be made of steel material. The steel material has small resonance with the compressor pump body during the operation of the compressor, effectively avoiding the occurrence of part of the high-frequency noise, and making the noise lower than that of the PPT material muffler in the high-frequency noise frequency band.

[0025] In order to reduce noises of different frequencies, when the air inlet hole 2031 is arranged on the right cavity 203, the distance from the axis of the pipe 206 connecting the left cavity 202 and the middle cavity 201 to the lower surface of the partition plate 2011 is greater than the distance from the axis of the pipe 206 connecting the right cavity and the middle cavity 201 to the lower surface of the partition plate 2011.

[0026] In order to reduce noises of different frequencies, when the air inlet hole 2031 is arranged on the left cavity 202, the distance from the axis of the pipe 206 connecting the left cavity 202 and the middle cavity 201 to the lower surface of the partition plate 2011 is less than the distance from the axis of the pipe 206 connecting the right cavity and the middle cavity 201 to the lower surface of the partition plate 2011.

[0027] In order to reduce noises of different frequencies, the upper cavity and the lower cavity are connected through two pipes 206.

[0028] In order to reduce noises of different frequencies, the absolute value of the difference between the distances from the end faces of the two pipes 206 in the upper cavity to the upper surface of the partition plate 2011 is greater than zero.

[0029] In order to achieve good noise reduction effect, the pipe 206 is a Bundy tube, and the diameter of the Bundy tube is 6.35 mm to 8.00 mm.

[0030] In order to ensure the stability of the muffler connecting plate 101 under load and enhance the supporting capacity of the muffler connecting plate 101, a rib plate 103 is provided between the muffler connecting plate 101 and the cylinder head 1, and both the muffler connecting plate 101 and the cylinder head 1 are connected to the rib plate 103.

[0031] In order to further ensure the sealing performance and connection stability between the connecting flange 204 and the muffler connecting plate 101, buckles 205 are evenly arranged around the connecting flange 204. The buckles 205 are in contact with the muffler connecting plate 101 to tighten the connecting flange 204 and the muffler connecting plate 101, which can serve as a secondary connection.

[0032] In order to improve the sealing performance between the connecting flange 204 and the muffler connecting plate 101, the connecting flange 204 and the muffler connecting plate 101 are riveted, and a sealing adhesive material is provided between the connecting flange 204 and the muffler connecting plate 101.

Claims

1. An integrated cylinder head for a cryogenic refrigerator compressor, comprising a cylinder head (1), Characterized in that: It further includes a silencer (2) and a silencer connecting plate (101). The silencer (2) is provided with an air inlet hole (2031), an air outlet interface and a connecting flange (204). The air inlet hole (2031) and the air outlet interface are communicated through a cavity. The inner ring of the connecting flange (204) is communicated with the air outlet interface. The cylinder head (1) is provided with a low-pressure air inlet (102). The air outlet (1011) on the silencer connecting plate (101) is fixedly connected and communicated with the low-pressure air inlet (102). The connecting flange (204) and the silencer connecting plate (101) are fixedly connected. The air outlet (1011) is communicated with the air outlet interface. The cavity of the silencer (2) is composed of a left cavity (202), a middle cavity (201) and a right cavity (203). A partition plate (2011) is provided in the middle cavity (201). The partition plate divides the middle cavity (201) into an upper cavity and a lower cavity. The upper cavity and the lower cavity are communicated through a pipeline (206). The left cavity (202) and the right cavity (203) are respectively communicated with the lower cavity through a pipeline (206). An air inlet hole (2031) communicated therewith is provided on the left cavity (202) or the right cavity (203). A pipeline (206) communicated with the air inlet hole (2031) is arranged in the left cavity (202) or the right cavity (203). When the air inlet hole (2031) is arranged on the right cavity (203), the distance from the axis of the pipeline (206) connecting the left cavity (202) and the middle cavity (201) to the lower surface of the partition plate (2011) is greater than the distance from the axis of the pipeline (206) connecting the right cavity and the middle cavity (201) to the lower surface of the partition plate (2011); when the air inlet hole (2031) is arranged on the left cavity (202), the distance from the axis of the pipeline (206) connecting the left cavity (202) and the middle cavity (201) to the lower surface of the partition plate (2011) is less than the distance from the axis of the pipeline (206) connecting the right cavity and the middle cavity (201) to the lower surface of the partition plate (2011).

2. The integrated cylinder head for a cryogenic refrigerator compressor according to claim 1, Characterized in that: The upper cavity and the lower cavity are communicated through two pipelines (206).

3. The integrated cylinder head for a cryogenic refrigerator compressor according to claim 2, Characterized in that: The absolute value of the difference between the distances from the end faces of the two pipelines (206) in the upper cavity to the upper surface of the partition plate (2011) is greater than zero.

4. The integrated cylinder head for a cryogenic refrigerator compressor according to any one of claims 1 to 3, Characterized in that: The pipeline (206) is a Bundy tube, and the diameter of the Bundy tube is 6.35 mm to 8.00 mm.

5. The integrated cylinder head for a cryogenic refrigerator compressor according to any one of claims 1 to 3, Characterized in that: A rib plate (103) is provided between the silencer connecting plate (101) and the cylinder head (1). Both the silencer connecting plate (101) and the cylinder head (1) are connected to the rib plate (103).

6. The integrated cylinder head for a cryogenic refrigerator compressor according to claim 5, Characterized in that: Buckles (205) are evenly arranged around the connecting flange (204). The buckles (205) are in contact with the silencer connecting plate (101) to tighten the connecting flange (204) and the silencer connecting plate (101).

7. The integral cylinder head for a cryogenic refrigerator compressor according to claim 5, characterized in that: The connecting flange (204) is riveted to the silencer connecting plate (101), and a sealing adhesive material is provided between the connecting flange (204) and the silencer connecting plate (101).

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