Sheath and air conditioning unit

Abstract

The present application provides a sheath and an air-conditioning unit. The sheath includes a strip-shaped sheath body, which is arranged in a spiral shape. The sheath body is used to be installed on the port pipe of the heat exchanger and is blocked between the main body of the heat exchanger and the port pipe of the heat exchanger. By applying the technical solution of the present invention, the sheath body is installed on the port pipe of the heat exchanger and is blocked between the main body of the heat exchanger and the port pipe of the heat exchanger, which can prevent the main body of the heat exchanger from causing stress concentration or friction on the port pipe and fatigue damage. At the same time, due to the presence of the sheath body, direct electrochemical corrosion to the port pipe can be avoided, thereby ensuring the life of the port pipe. In this way, the occurrence of refrigerant leakage and pipe breakage accidents can be reduced, and the working stability of the air-conditioning unit can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning equipment, and in particular to a sheath and an air-conditioning unit. Background Art

[0002] like Figure 1 As shown, currently, household air conditioners generally connect a compressor 2 and a condenser 3 through a copper tube 1. When in use, the refrigerant passes through the compressor 2 and branches out of the copper tube 1 into the condenser 3, and then branches back to the compressor 2 from the other end, completing the phase change heat transfer of the refrigerant.

[0003] Due to the large mass of the compressor and the high speed of the internal rotor, the compressor vibrates greatly during startup, shutdown, and operation, which in turn causes the copper tube to vibrate with a large amplitude. This can easily cause shear or torsional stress concentration at the connection between the copper tube and the condenser port, causing fatigue failure at the connection, ultimately leading to refrigerant leakage, tube breakage, and other accidents, causing the entire unit to malfunction. Summary of the Invention

[0004] The embodiments of the present invention provide a sheath and an air-conditioning unit to solve the technical problem in the prior art that the connection between the copper tube and the port of the heat exchanger of the air-conditioning unit is easily damaged.

[0005] An embodiment of the present application provides a sheath including a strip-shaped sheath body, which is arranged in a spiral shape. The sheath body is used to be sheathed on the port pipe of the heat exchanger and blocked between the heat exchanger body and the port pipe of the heat exchanger.

[0006] In one embodiment, the sheath body is an elastic sheath body. When the port pipe of the heat exchanger is in the expansion state, the sheath body expands in the radial direction of the helix and compresses in the axial direction of the helix.

[0007] In one embodiment, the diameter of the port pipe of the heat exchanger before expansion is R, the spacing between adjacent strip-shaped jacket bodies is T, and T>0.01R.

[0008] In one embodiment, T<0.1R.

[0009] The present application also provides an air-conditioning unit, comprising a sheath, which is the above-mentioned sheath.

[0010] In one embodiment, the air-conditioning unit includes: a compressor; a heat exchanger, the heat exchanger includes a main body and a port pipe arranged on the main body; a refrigerant pipe, the first end of the refrigerant pipe is connected to the compressor, and the second end of the refrigerant pipe is connected to the port pipe; the sheath body is spirally sleeved on the port pipe and blocked between the main body and the port pipe.

[0011] In one embodiment, the body comprises a sheet metal member, and the sheath body is intercepted between the sheet metal member and the port nozzle.

[0012] In one embodiment, the body includes fins, and the sheath body is intercepted between the fins and the port nozzle.

[0013] In one embodiment, the heat exchanger is a condenser or an evaporator.

[0014] In one embodiment, the refrigerant pipe is a copper pipe.

[0015] In the above embodiment, the protective sheath is placed over the heat exchanger's port nozzle and positioned between the heat exchanger body and the port nozzle. This prevents stress concentration or friction on the heat exchanger body from causing fatigue damage to the port nozzle. Furthermore, the protective sheath prevents direct electrochemical corrosion on the port nozzle, thereby extending its lifespan. This reduces refrigerant leaks and pipe breakage, ensuring the operational stability of the air conditioning unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural diagram of an air-conditioning unit in the prior art and a partially enlarged diagram thereof;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure of the port pipe of the heat exchanger of the air-conditioning unit when the pipe is expanded;

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure of the heat exchanger port pipe and the copper pipe plug;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of an embodiment of a sheath body according to the present invention;

[0021] Figure 5 yes Figure 4 A schematic diagram of the structure of the sheath body being installed on the port pipe of the unexpanded tube;

[0022] Figure 6 yes Figure 4 A schematic diagram of the structure of the sheath body installed on the port pipe after the expansion tube;

[0023] Figure 7 is a structural schematic diagram of an embodiment of an air-conditioning unit according to the present invention;

[0024] Figure 8 yes Figure 7 Enlarged structural diagram of point B of the air-conditioning unit. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0026] Through the previous research on the damage of the connection between the copper tube and the port of the heat exchanger, it was found that the specific damage point is often the port 31 of the heat exchanger connected to the copper tube. Figure 2 As shown, in order to make the heat exchanger's port pipe 31 pluggable with the copper tube, four pairs of expansion punches are used to expand the port pipe 31. During expansion, due to the uneven thickness of the material, the copper tube will cause a large stress mutation between the port pipe 31 and the heat exchanger 30 body during the expansion process, making the port pipe 31 prone to cracking. In addition, as shown in the figure, Figure 3 As shown, after the copper tube is plugged into the port pipe 31, the compressor drives the copper tube to vibrate, thereby driving the port pipe 31 to vibrate as well. A large stress mutation will occur between the port pipe 31 and the body of the heat exchanger 30, making it easy for cracks to occur at point A of the port pipe 31.

[0027] In addition, the port pipe 31 is in direct contact with the body of the heat exchanger 30. There is a potential difference between the copper tube and the body of the heat exchanger 30. The heat exchanger 30 is prone to produce condensed water, which can easily cause electrochemical corrosion and form a leakage point, making the A of the port pipe 31 more prone to cracking.

[0028] like Figure 4 and Figure 5 As shown, the present invention provides an embodiment of a sheath, which includes a strip-shaped sheath body 10, which is arranged in a spiral shape. The sheath body 10 is used to be sheathed on the port pipe 31 of the heat exchanger and is blocked between the body of the heat exchanger 30 and the port pipe 31 of the heat exchanger.

[0029] By applying the technical solution of the present invention, the protective sheath 10 is placed over the heat exchanger's port pipe 31, sandwiching it between the heat exchanger body 30 and the port pipe 31. This prevents stress concentration or friction from the heat exchanger body 30 on the port pipe 31, which could lead to fatigue damage. Furthermore, the presence of the protective sheath 10 prevents direct electrochemical corrosion on the port pipe 31, thereby extending the life of the port pipe 31. This reduces refrigerant leaks and pipe breakage, ensuring the operational stability of the air conditioning unit.

[0030] In addition, the sheath body 10 can also transfer the force to a longer area, increase the force-bearing area, reduce the impact of vibration shock on the port pipe 31, and solve the problem of port pipe 31 breakage caused by large pipeline vibration during startup, shutdown, and transportation.

[0031] It should also be noted that installing the sheath body 10 on the port pipe 31 can also serve as a mark to guide workers in operation.

[0032] During the expansion process, the wall thickness of the port pipe 31 will become thinner. If the thickness is increased locally, the punch will be subjected to uneven force, which can easily cause cracks at the front end of the port pipe 31 or significantly reduce the life of the punch. Figure 5 and Figure 6 As shown, in the technical solution of this embodiment, the sheath body 10 is an elastic sheath body 10. When the port pipe 31 of the heat exchanger is expanded, the sheath body 10 expands in the radial direction of the helix and compresses in the axial direction of the helix to adapt to the deformation of the port pipe 31 and provide good protection for the port pipe 31. During the expansion process, the sheath body 10 always closely adheres to the port pipe 31. When the port pipe 31 is subjected to external vibration and impact, the sheath can reduce the torsional and shear stresses on the port pipe 31, thereby reducing the risk of pipe breakage.

[0033] It should be noted that in order to reduce the influence of the flexible sheath body 10 on the tube expansion process, the tension required for the deformation of the sheath body 10 should be relatively small.

[0034] As a preferred embodiment, the diameter of the heat exchanger's port pipe 31 before expansion is R, and the spacing between adjacent strip-shaped jacket bodies 10 is T. Testing has shown that when T > 0.01R, the jacket bodies 10 can expand in the radial direction of the helical shape and compress in the axial direction of the helical shape during expansion. More preferably, testing has shown that when T < 0.1R, the jacket bodies 10 can better perform their blocking and force transmission functions.

[0035] When the vibration of the entire machine is transmitted to the port pipe 31 with great force, it is necessary to increase the cross-sectional area of ​​the sheath body 10 at the port pipe 31 where the force is greater, so as to reduce the stress on the port pipe 31 at this location.

[0036] like Figure 7 and Figure 8 As shown, the present invention further provides an air conditioning unit, which includes the above-mentioned protective cover. The use of the above-mentioned protective cover can reduce the occurrence of refrigerant leakage and pipe breakage accidents in the air conditioning unit, thereby ensuring the working stability of the air conditioning unit.

[0037] like Figure 7As shown, in the technical solution of this embodiment, the air-conditioning unit includes a compressor 20, a heat exchanger 30, and a refrigerant pipe 40. The heat exchanger 30 includes a main body and a port pipe 31 provided on the main body. The first end of the refrigerant pipe 40 is connected to the compressor 20, and the second end of the refrigerant pipe 40 is connected to the port pipe 31. The sheath body 10 is spirally sleeved on the port pipe 31 and is blocked between the main body and the port pipe 31. When the air-conditioning unit is in operation, as the compressor 20 drives the refrigerant pipe 40 to vibrate, the refrigerant pipe 40 also drives the port pipe 31 to vibrate. The sheath body 10 blocked between the main body and the port pipe 31 can prevent the main body from causing stress concentration or friction on the port pipe 31, thereby preventing fatigue damage. At the same time, due to the presence of the sheath body 10, direct electrochemical corrosion of the port pipe 31 can be avoided, thereby ensuring the life of the port pipe 31.

[0038] Optionally, the refrigerant pipe 40 is a copper pipe.

[0039] It should be noted that stress damage and electrochemical corrosion of the main body to the port nozzle 31 are typically caused primarily by the sheet metal or fins. Therefore, when the sheet metal causes stress damage and electrochemical corrosion to the port nozzle 31, the sheath 10 is positioned between the sheet metal and the port nozzle 31. Alternatively, when the fins cause stress damage and electrochemical corrosion to the port nozzle 31, the sheath 10 is positioned between the fins and the port nozzle 31.

[0040] It should be noted that the above technical solution can be applied to both condensers and evaporators.

[0041] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An air conditioning unit, characterized in that: include: compressor (20); A heat exchanger (30), the heat exchanger (30) comprising a body and a port pipe (31) provided on the body; A refrigerant pipe (40), wherein a first end of the refrigerant pipe (40) is connected to the compressor (20), and a second end of the refrigerant pipe (40) is connected to the port pipe (31); The sheath comprises a strip-shaped sheath body (10), the sheath body (10) being arranged in a spiral shape, the sheath body (10) being sleeved on the port pipe (31), and being blocked between the body and the port pipe (31); The sheath body (10) is an elastic sheath body (10). When the port pipe (31) of the heat exchanger is in the expansion state, the sheath body (10) expands in the radial direction of the spiral and compresses in the axial direction of the spiral.

2. The air conditioning unit according to claim 1, characterized in that: The diameter of the port pipe (31) of the heat exchanger before expansion is R, and the spacing between adjacent strip-shaped sheath bodies (10) is T, where T>0.01R.

3. The air conditioning unit according to claim 2, characterized in that: T<0.1R.

4. The air conditioning unit according to claim 1, wherein: The main body comprises a sheet metal part, and the sheath body (10) is blocked between the sheet metal part and the port pipe (31).

5. The air conditioning unit according to claim 1, characterized in that: The main body includes fins, and the sheath body (10) is blocked between the fins and the port pipe (31).

6. The air conditioning unit according to claim 1, characterized in that: The heat exchanger (30) is a condenser or an evaporator.

7. The air conditioning unit according to claim 1, characterized in that: The refrigerant pipe (40) is a copper pipe.

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