Heat exchanger and air conditioner

Abstract

The utility model provides a heat exchanger and air conditioner, wherein the heat exchanger includes: sheet body and aluminium pipe, aluminium pipe is provided on the sheet body, aluminium pipe includes a plurality of parallel straight pipe and the elbow that connects two adjacent straight pipe, and the distance between two adjacent straight pipe is in the range of 14.48 mm to 14.51 mm. Due to the fact that the distance between every two adjacent straight pipes is set to be within the range of 14.48 mm to 14.51 mm, the distance between every two adjacent straight pipes can be reduced, and therefore under the same heat exchange area, more aluminum pipes can be arranged, the refrigerant side area is increased, and the heat exchange amount is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a heat exchanger and an air conditioner. Background Art

[0002] In order to achieve energy saving and lightweight heat exchangers, aluminum is used to replace copper, and the copper tubes in the heat exchangers of the indoor and outdoor units of the air conditioner are replaced with aluminum tubes. While achieving the same heat exchange capacity, the volume and mass are controlled to save raw materials.

[0003] However, the existing household air conditioners have poor heat transfer coefficients of aluminum tubes under the same heat exchange area, resulting in a small heat exchange amount that does not meet the heat exchange requirements. Utility Model Content

[0004] The utility model solves the problem that the existing air conditioner has a poor heat exchange coefficient when using aluminum tubes.

[0005] In order to solve the above problems, the utility model provides a heat exchanger applied to an air conditioner, the heat exchanger comprising:

[0006] Sheet body;

[0007] An aluminum tube is arranged on the sheet body, and the aluminum tube includes a plurality of straight tubes arranged in parallel and a bent tube connecting two adjacent straight tubes, wherein the distance between two adjacent straight tubes is in the range of 14.48 mm to 14.51 mm.

[0008] By setting the distance between two adjacent straight tubes within the range of 14.48 mm to 14.51 mm, the distance between two adjacent straight tubes can be reduced, so that more aluminum tubes can be set under the same heat exchange area, thereby increasing the refrigerant side area and increasing the heat exchange capacity.

[0009] Optionally, the bending radius of the bent pipe is in the range of 7.22 mm to 7.26 mm.

[0010] By setting the bending radius of the bent pipe within the range of 7.22mm to 7.26mm, more aluminum tubes can be installed under the same heat exchange area, thereby increasing the refrigerant side area and the heat exchange capacity.

[0011] Optionally, the straight tube includes a first portion disposed on the sheet body and a second portion disposed beyond the sheet body, and a length of the second portion is in a range from 13.97 mm to 14.02 mm.

[0012] By setting the length of the second portion within the range of 13.97 mm to 14.02 mm, it is possible to avoid the second portion being squeezed and rebounded due to being too long during the tube expansion process.

[0013] Optionally, the radiator further includes a connecting pipe, which is arranged at the free end of the aluminum tube, and a first expansion platform is arranged at one end of the connecting pipe away from the first part, and an opening angle of the first expansion platform is in the range of 60° to 62°.

[0014] By setting the opening angle of the first expansion stage within a range of 60° to 62°, subsequent connection with other pipelines can be facilitated.

[0015] Optionally, the first expansion platform includes a root portion arranged close to the first part and a front portion arranged away from the first part, the outer diameter of the front portion is larger than the outer diameter of the root portion, and the height between the root portion and the front portion is in the range of 1.98 mm to 2.01 mm.

[0016] Optionally, the connecting pipe also includes a second flaring platform and a straight pipe segment connected to each other, the other end of the second flaring platform is connected to the first part, the other end of the straight pipe segment is connected to the first flaring platform, and the opening angle of the first flaring platform is greater than the opening angle of the second flaring platform.

[0017] By setting the opening angle of the first expanding stage to be greater than the opening angle of the second expanding stage, it is convenient to open the mold of the expander and reduce the use cost of the mold.

[0018] Optionally, the length of the straight tube segment is in the range of 7.98 mm to 8.01 mm.

[0019] By setting the length of the wire tube section within the range of 7.98 mm to 8.01 mm, it is possible to avoid the situation in which the second portion is squeezed and rebounded due to being too long during the tube expansion process.

[0020] Optionally, the material of the connecting pipe includes aluminum, and the connecting pipe and the aluminum pipe are integrally formed.

[0021] The processing technology can be reduced by forming the connecting pipe and the aluminum pipe into one piece.

[0022] Optionally, the diameter of the aluminum tube includes any one of 5mm, 4.9mm, 4.5mm, and 4mm.

[0023] An embodiment of the present application further provides an air conditioner, comprising the heat exchanger described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a heat exchanger provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the connecting pipes in the heat exchanger shown;

[0026] Figure 3 A schematic diagram comparing the changes in the refrigerant side area at different distances between straight pipes.

[0027] Description of reference numerals:

[0028] 100, heat exchanger; 10, sheet body; 20, aluminum tube; 30, connecting tube;

[0029] 210, straight pipe; 220, bent pipe;

[0030] 211, Part I; 212, Part II;

[0031] 310, first expansion platform; 320, second expansion platform; 330, straight pipe section;

[0032] 311. root; 312. front end. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below.

[0034] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the heat exchanger provided in the embodiment of the present application. Figure 2 for Figure 1 A schematic diagram of the structure of the connecting pipe in the heat exchanger shown. The embodiment of the present application provides a heat exchanger 100, which is applied to an air conditioner. The heat exchanger 100 includes a sheet body 10 and an aluminum tube 20. The aluminum tube 20 is arranged on the sheet body 10. The aluminum tube 20 includes a plurality of parallel straight tubes 210 and a curved tube 220 connecting two adjacent straight tubes 210, wherein the distance P between two adjacent straight tubes 210 is in the range of 14.48 mm to 14.51 mm. By setting the distance P between two adjacent straight tubes 210 in the range of 14.48 mm to 14.51 mm, the distance P between two adjacent straight tubes 210 can be reduced, so that more aluminum tubes 20 can be arranged under the same heat exchange area, thereby increasing the refrigerant side area and increasing the heat exchange amount.

[0035] In some embodiments, the aluminum tube 20 may be an internally threaded aluminum tube 20 , and the distance P between two adjacent straight tubes 210 is preferably 14.5 mm.

[0036] The bending radius Ra of the curved tube 220 is in the range of 7.22 mm to 7.26 mm. In some embodiments, the bending radius Ra of the curved tube 220 is preferably 7.25 mm.

[0037] The straight tube 210 includes a first portion 211 disposed on the sheet 10 and a second portion 212 disposed beyond the sheet 10. The length of the second portion 212 is in the range of 13.97 mm to 14.02 mm. In some embodiments, the length of the second portion 212 is preferably 14 mm.

[0038] It is understandable that, considering the material performance factor, the length of the second part 212 composed of aluminum material in the present application is shorter than the length of the second part 212 composed of copper material in the prior art. Specifically, the tensile strength of the material 3003 used in the aluminum tube 20 is only 95MPa to 130MPa, and the material TPM2 used in the copper tube can reach 220MPa to 255MPa, that is, the tensile strength of the copper tube is twice that of the aluminum tube 20, which leads to the second part 212 being squeezed and rebounded when it is too long during the molding process, especially in the tube expansion process. It is worth noting that after repeated practice, when the length of the second part 212 is 14mm, the best molding process requirements can be achieved.

[0039] The heat exchanger 100 further includes a connecting pipe 30, which is disposed at the free end of the aluminum tube 20 and is disposed in the second portion 212, that is, the length of the second portion 212 includes the length of the connecting pipe 30 and the length of other portions of the straight tube 210. The material of the connecting pipe 30 includes aluminum material, and in some embodiments, the connecting pipe 30 and the aluminum tube 20 are integrally formed.

[0040] The end of the connecting pipe 30 away from the first portion 211 is provided with a first expansion platform 310, and the opening angle β of the first expansion platform 310 is in the range of 60° to 62°. In some embodiments, the opening angle β of the first expansion platform 310 is preferably 60°.

[0041] The first expansion platform 310 includes a root portion 311 disposed near the first portion 211 and a front end portion 312 disposed away from the first portion 211, the outer diameter of the front end portion 312 is greater than the outer diameter of the root portion 311, and the height between the root portion 311 and the front end portion 312 is in the range of 1.98 mm to 2.01 mm. In some embodiments, the height between the root portion 311 and the front end portion 312 is preferably 2 mm.

[0042] The connecting pipe 30 also includes a second flaring platform 320 and a straight pipe section 330 which are connected, the other end of the second flaring platform 320 is connected to the first part 211, the other end of the straight pipe section 330 is connected to the first flaring platform 310, and the opening angle β of the first flaring platform 310 is greater than the opening angle of the second flaring platform 320. By setting the opening angle β of the first flaring platform 310 to be greater than the opening angle of the second flaring platform 320, it is convenient to open the mold of the flaring device and reduce the use cost of the mold. Among them, the flaring device can be understood as a tooling equipment for designing the opening angle of the first flaring platform 310 and the opening angle of the second flaring platform 320.

[0043] In some embodiments, the opening angle of the first expansion stage 310 may also be equal to the opening angle of the second expansion stage 320. The specific setting may be made according to the actual situation, and no specific limitation is made here.

[0044] The length of the straight tube segment 330 is in the range of 7.98 mm to 8.01 mm. In some embodiments, the length of the straight tube segment 330 is 8 mm. It is understood that, in consideration of material performance factors, the length of the straight tube segment 330 composed of aluminum material in the present application is smaller than the length of the straight tube segment 330 composed of copper material in the prior art. Specifically, the tensile strength of the material 3003 used in the aluminum tube 20 is only 95 MPa to 130 MPa, and the material TPM2 used in the copper tube can reach 220 MPa to 255 MPa, that is, the tensile strength of the copper tube is twice that of the aluminum tube 20, which results in that during the molding process, especially in the tube expansion process, the straight tube segment 330 will be squeezed and rebounded when it is too long.

[0045] The diameter of the aluminum tube 20 includes any one of 5 mm, 4.9 mm, 4.5 mm, and 4 mm.

[0046] Please continue reading Figure 3 , Figure 3 This is a comparative diagram of the change in the refrigerant side area under different distances between straight tubes. 2 ~4000mm 2 Taking the heat exchange block width D of 11.6 (currently the mainstream size in the market) as an example, by comparing the two internally threaded aluminum tubes with different tube spacings, it can be seen that under the same heat exchange area, the refrigerant side area when the distance between the straight tubes is 14.5mm is 28% to 35% higher than the refrigerant side area when the distance between the straight tubes is 19.5mm.

[0047] Among them, the refrigerant side area = π*(tube diameter-2*wall thickness)*tube length / 1000; tube length = expansion coefficient*(expansion height+exposed head length)*2+π*P / 2, the tube diameter is 5mm, the wall thickness is 0.4mm, the expansion coefficient is 1.02, and the expansion height is 260mm. Among them, the above values ​​are only examples and do not represent the final molding process parameters.

[0048] The experimental data can be seen in the following table:

[0049]

[0050] From the above, it can be deduced that the refrigerant side area when the distance between the straight tubes is 14.5 mm increases by 28% to 35% compared with the refrigerant side area when the distance between the straight tubes is 19.5 mm.

[0051] An embodiment of the present application further provides an air conditioner, which includes the heat exchanger in any of the above embodiments. The specific content of the heat exchanger can be seen above and will not be repeated here.

[0052] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A heat exchanger, applied to an air conditioner, characterized in that: The heat exchanger comprises: Sheet body; An aluminum tube is arranged on the sheet body, and the aluminum tube includes a plurality of straight tubes arranged in parallel and a bent tube connecting two adjacent straight tubes, wherein the distance between two adjacent straight tubes is in the range of 14.48 mm to 14.51 mm.

2. The heat exchanger according to claim 1, characterized in that: The bending radius of the bent pipe is in the range of 7.22 mm to 7.26 mm.

3. The heat exchanger according to claim 2, characterized in that: The straight tube includes a first portion disposed on the sheet body and a second portion disposed beyond the sheet body, and a length of the second portion is in a range of 13.97 mm to 14.02 mm.

4. The heat exchanger according to claim 3, characterized in that The heat exchanger includes a connecting pipe, which is arranged at the free end of the aluminum tube. A first expansion platform is arranged at one end of the connecting pipe away from the first part, and an opening angle of the first expansion platform is in the range of 60° to 62°.

5. The heat exchanger according to claim 4, characterized in that: The first expansion platform includes a root portion disposed close to the first portion and a front portion disposed away from the first portion, the outer diameter of the front portion is larger than the outer diameter of the root portion, and the height between the root portion and the front portion is in the range of 1.98 mm to 2.01 mm.

6. The heat exchanger according to claim 4, characterized in that The connecting pipe also includes a second flaring platform and a straight pipe section connected to each other, the other end of the second flaring platform is connected to the first part, the other end of the straight pipe section is connected to the first flaring platform, and the opening angle of the first flaring platform is greater than the opening angle of the second flaring platform.

7. The heat exchanger according to claim 6, characterized in that The length of the straight tube section is in the range of 7.98 mm to 8.01 mm.

8. The heat exchanger according to any one of claims 4 to 7, characterized in that: The material of the connecting pipe includes aluminum, and the connecting pipe and the aluminum pipe are integrally formed.

9. The heat exchanger according to any one of claims 1 to 7, characterized in that: The diameter of the aluminum tube includes any one of 5mm, 4.9mm, 4.5mm, and 4mm.

10. An air conditioner, characterized in that: The air conditioner includes the heat exchanger according to any one of claims 1 to 9.

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