High-pressure connection structure for compressor housing inlet

Abstract

The present invention discloses a high-pressure connection structure for air intake of a compressor casing, wherein a high-pressure air intake pipe and an air intake pipe muffler are provided in the compressor casing, and the structure is characterized in that a flexible connecting pipe is sealedly connected between the high-pressure air intake pipe and the air intake pipe muffler. A connecting copper pipe is sealedly connected in the air intake pipe muffler, and the flexible connecting pipe is sealedly connected to the connecting copper pipe. The advantage of the present invention is that it can realize a flexible connection between the air intake pipe and the air intake muffler, reduce the vibration of the compressor, and extend the service life of the compressor, especially the two-stage compressor. The flexible sealing pipe is sealed and fixed by the connecting copper pipe, and the connecting copper pipe serves as an intermediate component connecting the flexible connecting pipe and the air intake pipe muffler, which can protect the end of the flexible connecting pipe.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration compressors, and in particular to a high-pressure connection structure for air intake of a compressor casing. Background Art

[0002] In today's society, people have higher and higher requirements for energy saving, moisture retention and freshness preservation in refrigerators and freezers. The compressor is the core component of refrigerators and freezers, and is the key to improving the quality of refrigeration appliances. In the refrigeration process, the operating stability of the compressor is a factor that must be considered. The vibration of the compressor is mainly caused by the high speed of airflow at the suction end. Usually, when designing the compressor, the staff will set an intake muffler inside the compressor to reduce the pressure pulsation effect and pressure caused by the airflow. For example, in the Chinese patent literature, the invention patent with patent number CN2020111578792 discloses a compressor muffler and a compressor. The compressor muffler includes a shell, and the shell is provided with an air inlet and an air outlet. A cavity is provided in the shell, and an insulating coating is provided on the inner wall of the shell.

[0003] Our company has recently developed a refrigerator refrigeration system with a compressor that uses two-stage compression. The first stage of compression uses the first-stage piston to suck the refrigerant from the suction pipe outside the shell. After being sucked in through the connecting pipeline, it is directly discharged into the shell. The inside of the shell is in a high-pressure state. The second stage of compression uses the second-stage piston to suck the refrigerant from the inside of the shell and discharge it to the outside of the shell. This compressor is different from the traditional compressor. There is high-pressure gas in the shell. The suction pipe of the compressor needs to be directly connected to the suction muffler of the compressor through a pipeline. This connection also requires a certain degree of flexibility, otherwise the vibration of the movement will be transmitted to the shell. Summary of the invention

[0004] Based on the deficiency that the air flow velocity is too high during the intake of the high-pressure part in the two-stage compression in the prior art, resulting in strong vibration, the present invention provides a high-pressure connection structure for the compressor casing intake, which can achieve a flexible connection between the intake pipe and the intake muffler, thereby reducing the vibration of the compressor.

[0005] The second purpose of the present application is to achieve a sealed connection of the entire suction pipeline to prevent refrigerant from leaking into the shell.

[0006] The third object of the present application is to improve the stability of the flexible connecting pipe in coping with the impact of high-pressure airflow.

[0007] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions.

[0008] A high-pressure connection structure for compressor casing air intake, wherein a high-pressure air intake pipe and an air intake pipe muffler are arranged in the compressor casing, and wherein a flexible connection pipe is sealed and connected between the high-pressure air intake pipe and the air intake pipe muffler.

[0009] The flexible connection between the suction pipe and the suction muffler can be realized, the vibration of the compressor can be reduced, and the service life of the compressor, especially the two-stage compressor, can be extended.

[0010] Preferably, a connecting copper tube is provided in the air intake pipe muffler for sealing connection, and the flexible connecting tube is sealed and connected to the connecting copper tube. The flexible sealing tube is sealed and fixed by the connecting copper tube, and the connecting copper tube serves as an intermediate component for connecting the flexible connecting tube and the air intake pipe muffler, and can protect the end of the flexible connecting tube.

[0011] Preferably, the flexible connecting pipe comprises a first connecting section connected to the high-pressure intake pipe and a second connecting section connected to the intake pipe muffler, a first liner is arranged in the first connecting section, the outer side surface of the first liner is in a stepped shaft shape, and the stepped surface of the first liner abuts against the outer end of the first connecting section. The first liner is filled into the first connecting section to protect the inner side of the end of the first connecting section and ensure the connection reliability of the flexible connecting pipe.

[0012] Preferably, a second liner is provided in the second connecting section, the outer side surface of the second liner is a stepped shaft shape, and the stepped surface of the second liner abuts against the outer end of the second connecting section. The second liner is filled into the second connecting section and abuts against the end surface of the second connecting section, thereby improving the reliability of the end of the flexible connecting pipe.

[0013] Preferably, the flexible connecting pipe is made of polymer or plastic material, which is elastic and has a reliable flexible buffering effect.

[0014] Preferably, the outer wall of one end of the connecting copper tube facing the intake pipe muffler is sealed and connected to the intake pipe muffler by injection molding. The injection molding connection ensures the connection sealing between the connecting copper tube and the intake pipe muffler.

[0015] Preferably, a plurality of reinforcing rings are provided on the outer wall of one end of the copper pipe connected to the air intake pipe muffler for injection molding sealing connection, so as to increase the connection area between the connection passage and the air intake pipe muffler and improve the firmness of the injection molding.

[0016] Preferably, the first liner is plugged into the first connecting section, and after the first liner and the first connecting section are combined, the first connecting section is inserted into the high-pressure air intake pipe, and the high-pressure air intake pipe is sealed and pressed inwardly with the first connecting section after the first connecting section is inserted. The connection is reliable and has strong anti-leakage ability.

[0017] Preferably, the second liner is plug-fitted with the second connecting section, and after the second inner side and the second connecting section are combined, the second connecting section is inserted into the intake pipe muffler, and the intake pipe muffler is sealed and pressed inwardly with the second connecting section after the second connecting section is inserted. The connection is reliable and has strong anti-leakage ability.

[0018] Preferably, an intermediate connecting pipe is provided between the connecting copper pipe and the intake pipe muffler, and the intermediate connecting pipe is a metal structure. Through the intermediate connecting pipe transition, another pipe connection mode of intake pipe mufflers of different specifications is used to expand the application scope of the present application.

[0019] Preferably, the shape of the intermediate connecting pipe is a stepped pipe shape, and a connecting thread is arranged on the outer side of the small diameter end of the intermediate connecting pipe, and the connecting thread on the intermediate connecting pipe is connected with the thread of the intake pipe muffler; the intermediate connecting pipe is connected with the connecting copper pipe by welding. It is convenient to connect the intermediate connecting pipe with the intake pipe muffler, the connecting copper pipe is connected with the intermediate connecting pipe by thread, and the connecting copper pipe and the second connecting section are crimped by the second liner, so that the connection is reliable.

[0020] Preferably, a limiting block corresponding to the flexible connecting pipe is provided on the compressor casing, and a limiting arc groove matching the flexible connecting pipe is provided on the limiting block, and the limiting arc groove is in a semi-cylindrical shape. The limiting block can achieve the fitting and positioning of the side wall of the flexible connecting pipe through the limiting arc groove, thereby improving the ability of the flexible connecting pipe to cope with the impact of high-speed airflow.

[0021] Preferably, the compressor casing is provided with an elastic tensioning device corresponding to the flexible connecting tube on the opposite side of the limit block, the elastic tensioning device includes a limit frame and a plurality of limit rollers, the limit frame includes a limit rotating shaft, the limit rotating shaft is provided with a plurality of guide rods arranged around the axis of the limit rotating shaft, the limit roller is rotatably arranged at the outer end of the guide rod, and the limit roller can abut against the flexible connecting tube.

[0022] The elastic tensioning device can cooperate with the limiting block to elastically compress the flexible connecting pipe, which can not only realize the elastic limitation of the flexible connecting pipe, but also prevent the flexible connecting pipe from being excessively deformed under the impact of high-speed airflow, thereby ensuring the reliability of the flexible connecting pipe.

[0023] Preferably, both ends of the limit shaft are provided with limit bearings, and the compressor casing is provided with a guide groove corresponding to the limit shaft. The guide groove is in the shape of a straight line, and the straight line where the guide groove is located passes through the limit block. The limit bearing is rolled in the guide groove, and a reset spring for cooperating with the limit bearing is provided in the guide groove along the axis of the guide groove. The limit bearing is used to complete the rotation of the limit shaft, and the limit bearing rolls in the guide groove to ensure the vertical movement of the limit shaft. The reset spring provides reset pressure, which can press the limit roller to the surface of the flexible connecting pipe, thereby providing a reliable clamping effect, and can cope with the impact of the airflow pressure on the flexible connecting pipe.

[0024] Preferably, both ends of the limit shaft are provided with limit bearings, a guide groove corresponding to the limit shaft is provided on the compressor casing, the limit bearing is arranged to roll in the guide groove, the guide groove is in an arc shape, when the limit bearing is located in the middle of the guide groove, at least two limit rollers can fit the flexible connecting tube, the guide groove is provided with reset springs on both sides of the limit bearing, and the guide rod is made of elastic material. The guide groove is arranged in a transverse arc relative to the flexible connecting tube, the limit bearing cooperates with the limit frame to realize the rotation of the limit frame, and can also swing horizontally and reset as a whole, which has a better elastic limit effect on the flexible connecting tube.

[0025] The present invention has the following beneficial effects: it can realize flexible connection between the intake pipe and the intake muffler, thereby reducing the vibration of the compressor; it can realize a sealed connection of the entire intake pipeline, thereby preventing the refrigerant from leaking into the shell; and it can improve the stability of the flexible connecting pipe in coping with the impact of high-pressure airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention.

[0027] Figure 2 It is a top view of the present invention.

[0028] Figure 3 yes Figure 2 Sectional view of AA.

[0029] Figure 4 yes Figure 2 Cross-sectional view of BB.

[0030] Figure 5 yes Figure 1 Schematic diagram of the suction muffler in the illustrated embodiment.

[0031] Figure 6 yes Figure 1 Schematic diagram of the connecting copper tube structure in the illustrated embodiment.

[0032] Figure 7 It is a schematic structural diagram of the second embodiment of the present invention.

[0033] Figure 8 yes Figure 7 Schematic diagram of the suction muffler in the illustrated embodiment.

[0034] Fig. 9 yes Figure 7 A schematic diagram of the structure of the intermediate connecting pipe in the illustrated embodiment.

[0035] Fig.10 It is a schematic structural diagram of the third embodiment of the present invention.

[0036] Fig.11 yes Fig.10 A schematic structural diagram of the middle limiting frame of the illustrated embodiment.

[0037] Fig.12 It is a schematic structural diagram of a fourth embodiment of the present invention.

[0038] In the figure: high-pressure intake pipe 1, connecting section of high-pressure intake pipe 1a, annular groove 1b, flexible connecting pipe 2, first connecting section 2a, second connecting section 2b, first liner 3, compressor casing 4, connecting copper pipe 5, convex ring 5a, outer wall 5b, reinforcement ring 5c, second liner 6, intake pipe muffler 7, air inlet 7a, movement 8, intermediate connecting pipe 9, large diameter end 9a, connecting thread 9b, limit frame 10, limit roller 11, limit rotating shaft 12, guide rod 13, limit bearing 14, guide groove 15, return spring 16. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] Embodiment 1,

[0041] like Figures 1 to 6 As shown, a high-pressure connection structure for air intake of a compressor casing is provided, wherein a core 8, a high-pressure air intake pipe 1 and an air intake pipe muffler 7 are provided in the compressor casing 4, and a flexible connecting pipe 2 is sealedly connected between the high-pressure air intake pipe 1 and the air intake pipe muffler 7. A limiting block corresponding to the flexible connecting pipe 2 is provided on the compressor casing 4, and the limiting block is located on one side of the core. A limiting arc groove matching the flexible connecting pipe 2 is provided on the limiting block, and the limiting arc groove is in the shape of a semi-cylinder. The flexible connecting pipe 2 is made of polymer, rubber or plastic material.

[0042] The flexible connecting pipe 2 includes a first connecting section 2a connected to the high-pressure intake pipe 1 and a second connecting section 2b connected to the intake pipe muffler 7. The first connecting section 2a is provided with a first liner 3, the outer side surface of the first liner 3 is a stepped shaft shape, and the stepped surface of the first liner 3 abuts against the outer end of the first connecting section 2a. The second connecting section 2b is provided with a second liner 6, the outer side surface of the second liner 6 is a stepped shaft shape, and the stepped surface of the second liner 6 abuts against the outer end of the second connecting section 2b. The high-pressure intake pipe 1 includes a connecting section 1a of the high-pressure intake pipe with a vertical opening upwardly arranged, and the connecting section 1a of the high-pressure intake pipe is connected to the first connecting section 2a.

[0043] The first liner 3 is plugged into the first connection section 2a, and the outer side of the first liner 3 is provided with a plurality of convex sections in the shape of a pitch cone. After the first liner 3 and the first connection section 2a are combined, the first connection section 2a is inserted into the high-pressure intake pipe 1. After the first connection section 2a is inserted, the high-pressure intake pipe 1 is sealed and pressed inward with the first connection section 2a. The high-pressure intake pipe 1 is a copper pipe, and the upper end of the high-pressure intake pipe 1 is provided with two annular grooves 1b pressed inward. The position of the annular grooves 1b is pressed inward and cooperates with the convex section of the first liner 3 to limit the position. The flexibility of the flexible connecting pipe 2 itself forms a flexible structure similar to a sealing pad, so as to achieve insulation sealing at the first connection section 2a of the flexible connecting pipe 2.

[0044] The second liner 6 is plug-fitted with the second connecting section 2b. After the second inner side and the second connecting section 2b are combined, the second connecting section 2b is inserted into the intake pipe muffler 7. After the second connecting section 2b is inserted, the intake pipe muffler 7 is sealed and pressed inward with the second connecting section 2b. A connecting copper tube 5 is provided in the intake pipe muffler 7 for sealing connection. One end of the intake copper tube is inserted into the air inlet 7a of the intake pipe muffler 7. The flexible connecting tube 2 is sealed and connected with the connecting copper tube 5. The outer wall 5b of one end of the connecting copper tube 5 facing the intake pipe muffler 7 is sealed and connected with the intake pipe muffler 7 by injection molding. Three reinforcing rings 5c arranged in parallel at intervals are provided on the outer wall 5b of one end of the connecting copper tube 5 and the intake pipe muffler 7 for injection molding. The reinforcing ring 5c ​​is provided to protrude outward, and the radial cross-section of the reinforcing ring 5c ​​is semicircular. The outer side of the second lining 6 is also provided with a plurality of convex parts in the shape of a pitch cone. The other end of the connecting copper tube 5 is located outside the air inlet 7a. The end of the connecting copper tube 5 located outside the air inlet 7a is provided with a plurality of inwardly recessed convex rings 5a. The convex rings 5a cooperate with the convex parts on the second lining 6 to realize the expansion positioning and sealing of the flexible connecting tube 2. Figure 3 and Figure 6 It can be seen that the lateral dimension of the upper section of the connecting copper tube 5 is larger than the lateral dimension of the lower end of the connecting copper tube 5, the upper section and the lower end of the connecting copper tube 5 are connected by a frustum with a downward taper angle, and the lower section of the connecting copper tube 5 is injection-moldedly connected to the air inlet 7a. The present application can achieve a flexible connection between the suction pipe and the suction muffler through the flexible connecting pipe 2, thereby reducing the vibration of the compressor.

[0045] Embodiment 2,

[0046] A high pressure connection structure for air intake of a compressor casing 4, such as Figures 7 to 9As shown, the difference between Example 2 and Example 1 is that an intermediate connecting pipe 9 is provided between the connecting copper pipe 5 and the intake pipe muffler 7, and the intermediate connecting pipe 9 is a metal structure. The shape of the intermediate connecting pipe 9 is a stepped pipe, and a connecting thread 9b is provided on the outer side of the small diameter end of the intermediate connecting pipe 9, and the connecting thread 9b on the intermediate connecting pipe 9 is threadedly connected to the intake pipe muffler 7; the large diameter end 9a of the intermediate connecting pipe 9 is welded to the connecting copper pipe 5. Through the transition of the intermediate connecting pipe 9, as another pipe connection method of the intake pipe muffler 7 of different specifications, the application scope of the present application is expanded.

[0047] Embodiment 3,

[0048] A high pressure connection structure for air intake of a compressor casing 4, such as Fig.10 and Fig.11 As shown, the difference between Example 3 and Example 1 is that: the compressor housing 4 is provided with an elastic tensioning device corresponding to the flexible connecting tube 2 on the opposite side of the limiting block, and the elastic tensioning device includes a limiting frame 10 and two limiting rollers 11. The limiting frame 10 includes a limiting rotating shaft 12, and the limiting rotating shaft 12 is provided with two guide rods 13 arranged around the axis of the limiting rotating shaft 12, and the two guide rods 13 are arranged at an obtuse angle. The limiting roller 11 is rotatably arranged at the outer end of the guide rod 13, and the limiting roller 11 can abut against the flexible elastic tube. The two ends of the limiting rotating shaft 12 are respectively provided with limiting bearings 14, and the limiting bearings 14 are fixedly connected to the ends of the limiting rotating shaft 12. The compressor housing 4 is provided with a guide groove 15 corresponding to the limiting rotating shaft 12, and the limiting bearing 14 and the guide groove 15 are arranged with a gap, so that the limiting bearing 14 can slide or roll in the guide groove 15. The guide groove 15 is in the shape of a straight line, and both ends of the guide groove 15 are closed to form a "mouth"-shaped structure to prevent the limit bearing 14 from slipping off. The wall of the guide groove 15 corresponding to the lower end of the limit shaft 12 is fixed on the compressor casing 4, and the wall of the guide groove 15 corresponding to the upper end of the limit shaft 12 is fixed on the top cover above the compressor casing 4. The straight line where the guide groove 15 is located passes through the limit block, and the limit bearing 14 is rolled in the guide groove 15. The guide groove 15 is provided with a reset spring 16 arranged along the axis of the guide groove 15 for matching the limit bearing 14. The limit bearing 14 is used to complete the rotation of the limit shaft 12. The limit bearing 14 rolls in the guide groove 15 to ensure that the limit shaft 12 keeps moving in a vertical state. The reset spring 16 provides reset pressure, which can press the limit roller 11 to the surface of the flexible connecting pipe 2, thereby providing a reliable pressing effect, and can cope with the impact of the flexible connecting pipe 2 on the airflow pressure.

[0049] Embodiment 4,

[0050] A high-pressure connection structure for air intake of a compressor housing 4, wherein both ends of a limit shaft 12 are provided with limit bearings 14, a guide groove 15 corresponding to the limit shaft 12 is provided on the compressor housing 4, and the limit bearing 14 is arranged to roll in the guide groove 15, such as Fig.12 As shown, the difference between Example 4 and Example 3 is that the guide groove 15 is in the shape of an arc, and the middle part of the guide groove 15 is convex toward the side where the flexible connecting tube 2 is located. When the limit bearing 14 is located in the middle of the guide groove 15, the two limit rollers 11 can fit the flexible connecting tube 2, and the guide groove 15 is provided with a reset spring 16 on both sides of the limit bearing 14, and the guide rod 13 is made of elastic material. The guide groove 15 is arranged in a transverse arc relative to the flexible connecting tube 2. The limit bearing 14 cooperates with the limit frame 10 to realize the rotation of the limit frame 10, and can also swing horizontally and reset as a whole, which has a better elastic limit effect on the flexible connecting tube 2.

Claims

1. A high-pressure connection structure for air intake of a compressor casing, wherein a high-pressure air intake pipe and an air intake pipe muffler are arranged in the compressor casing, wherein: A flexible connecting pipe is sealed between the high-pressure intake pipe and the intake pipe muffler. A limiting block corresponding to the flexible connecting pipe is provided on the compressor casing. A limiting arc groove matching the flexible connecting pipe is provided on the limiting block. An elastic tensioning device corresponding to the flexible connecting pipe is provided on the compressor casing on the opposite side of the limiting block. The elastic tensioning device includes a limiting frame and a plurality of limiting rollers, and the limiting rollers can abut against the flexible connecting pipe.

2. A high pressure connection structure for compressor casing air intake according to claim 1, characterized in that: A connecting copper pipe is provided in a sealing connection inside the intake pipe muffler, and the flexible connecting pipe is sealingly connected to the connecting copper pipe.

3. A high-pressure connection structure for compressor casing air intake according to claim 1 or 2, characterized in that: The flexible connecting pipe includes a first connecting section connected to the high-pressure intake pipe and a second connecting section connected to the intake pipe muffler. A first liner is provided in the first connecting section. The outer side surface of the first liner is a stepped shaft shape. The stepped surface of the first liner abuts against the outer end of the first connecting section.

4. A high-pressure connection structure for compressor casing air intake according to claim 3, characterized in that: A second liner is provided in the second connecting section, the outer side surface of the second liner is in a stepped shaft shape, and the stepped surface of the second liner abuts against the outer end of the second connecting section.

5. A high pressure connection structure for compressor casing air intake according to claim 2, characterized in that: An intermediate connecting pipe is connected between the connecting copper pipe and the intake pipe muffler, and the intermediate connecting pipe is a metal structure.

6. A high pressure connection structure for compressor casing air intake according to claim 5, characterized in that: The shape of the intermediate connecting pipe is a stepped pipe shape, and a connecting thread is arranged on the outer side of one end of the intermediate connecting pipe with a small diameter. The connecting thread on the intermediate connecting pipe is connected with the thread of the intake pipe muffler; the intermediate connecting pipe is connected with the connecting copper pipe by welding.

7. A high pressure connection structure for compressor casing air intake according to claim 1, characterized in that: The shape of the limiting arc groove is semi-cylindrical.

8. A high pressure connection structure for compressor casing air intake according to claim 1, characterized in that: The limiting frame comprises a limiting rotating shaft, on which a plurality of guide rods are arranged around the axis of the limiting rotating shaft, and the limiting roller is rotatably arranged at the outer end of the guide rod.

9. A high-pressure connection structure for compressor casing air intake according to claim 8, characterized in that: Limit bearings are respectively provided at both ends of the limit shaft, and a guide groove corresponding to the limit shaft is provided on the compressor casing. The guide groove is in the shape of a straight line, and the straight line where the guide groove is located passes through the limit block. The limit bearing is rollingly arranged in the guide groove, and a return spring is provided in the guide groove along the axis of the guide groove to cooperate with the limit bearing.

10. A high pressure connection structure for compressor casing air intake according to claim 8, characterized in that: Limit bearings are respectively provided at both ends of the limit shaft, and a guide groove corresponding to the limit shaft is provided on the compressor casing. The limit bearing is rollingly arranged in the guide groove, and the shape of the guide groove is arc-shaped. When the limit bearing is located in the middle position of the guide groove, at least two limit rollers can fit the flexible connecting pipe, and the guide groove is respectively provided with return springs on both sides of the limit bearing, and the guide rod is made of elastic material.

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