Heat exchanger, method of producing the heat exchanger

A technology for heat exchangers and manufacturing methods, applied in heat exchange equipment, chemical instruments and methods, separation methods, etc., can solve the problems of heat exchanger temperature rise and energy saving, and achieve efficient heat exchange, easy and safe management, and transmission. High thermal efficiency

Inactive Publication Date: 2010-06-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the defrosting operation consumes a large amount of energy, and there is a problem not only in terms of energy saving, but also in raising the temperature around the heat exchanger.

Method used

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  • Heat exchanger, method of producing the heat exchanger
  • Heat exchanger, method of producing the heat exchanger
  • Heat exchanger, method of producing the heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0082] In Embodiment 1, the metal fins 20 of the heat exchanger 10 are formed on a fin plate with a pore structure satisfying the aforementioned pore requirements (pore diameter: 3.0 nm, pore depth: 50 μm). The method, and the configuration and manufacturing method of the heat exchanger 10 obtained by expanding the heat transfer tube 30 through the through hole of the metal fin 20 formed with fine holes will be described.

[0083] Figure 7 It is a figure which shows the flow example of the processing process of the formation of the pore in a fin plate. Here, for Figure 7The process of the treatment process will be mainly described. First, a pure aluminum rolled plate (for example, JIS1060 grade, thickness 200 μm) as a raw material is cut into the size of the metal fins 20, and a predetermined punching process is performed to form through holes for passing through the heat transfer tubes 30 to produce metal fins. The fin 20 is a flat fin plate. Depending on the size and c...

Embodiment approach 2

[0102] As mentioned above, in factories dealing with food processing, etc., from the standpoint of sanitation, in order to prevent mildew or fungus countermeasures, the management value of lower temperature and lower humidity (for example, 5°C-20%RH, etc.) than the normal environment is usually set. . Therefore, in Embodiment 2, the heat exchanger 10 optimal for such a low-temperature and low-humidity environment is manufactured.

[0103] As described above, in the case where the heat exchanger 10 having fine pores is in an environment where the relative pressure of water vapor is about 0.3 (relative humidity 30% RH), the diameter of the fine pores is about 1.0 nm, that is, about 2.0 nm. It is expected that the best adsorption characteristics can be obtained with the pores of the pore diameter. In addition, in a low-temperature and low-humidity environment, since the absolute amount of moisture in the air is not that much, it is considered that it is only necessary to absorb ...

Embodiment approach 3

[0112] The configuration of the heat exchanger 10 in the third embodiment is the same as that of the above-mentioned embodiments. However, the heat transfer tube 30 (including the bent tube 31 ) is also made of all-aluminum, using aluminum which has good heat transfer properties and can be anodized as a material, similarly to the metal fin 20 . In addition, fine holes are formed not only in the metal fin 20 but also in the heat transfer tube 30 (elbow 31 ).

[0113] The assembly of the heat exchanger 10 is the same as the usual method. For example, 160 metal fins 20 are arranged in three layers and four rows, and heat transfer tubes 30 are inserted into the through holes of the metal fins 20 . Then, the heat transfer tube 30 is expanded from the inside, and the metal fin 20 and the heat transfer tube 30 are both integrated. Furthermore, a plurality of heat transfer tubes 30 are connected by an elbow 31 . Thus, an all-aluminum heat exchanger 10 is prepared.

[0114] The open...

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Abstract

A heat exchanger includes a heat transfer tube functioning as a flow path for refrigerant and also includes metal fins. The metal fins transmit heat of the heat transfer tube to air and have pores that are open inward from the surfaces of the metal fins and absorb and release moisture in the air when relative pressure is in the range of 0.1 - 0.9. The pores have a diameter in the range of 1 - 20 nm and a depth in the range of 1 - 100 mu m.

Description

technical field [0001] The present invention relates to a heat exchanger having the function of absorbing and desorbing moisture in the air, its manufacturing method and the like. Background technique [0002] Generally, cooling and heating devices such as air-conditioning systems and refrigeration systems have metal heat exchangers that function as evaporators and condensers. Materials with high heat transfer rates such as aluminum, stainless steel, and copper are used as heat exchange materials. When the heat exchanger functions as an evaporator, the low-temperature refrigerant flows through the tubes to exchange heat by absorbing the heat of the air. However, at this time, the moisture (water vapor) in the air is condensed on the surface when it is cold, and soon forms Since frost adheres and covers the heat exchanger, heat exchange between the refrigerant and air cannot be performed satisfactorily as the operation time progresses, and the operation efficiency deteriorat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/32B01D53/26F25B17/08
CPCF28D1/0477F28F1/32F28F13/187B01D53/265F28F2255/20Y10T29/49378
Inventor 前川武之森本裕之杉本猛山下哲也山下浩司松冈文雄
Owner MITSUBISHI ELECTRIC CORP
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