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Heat exchanger capable of automatically defrosting or deicing

A heat exchanger, automatic technology, applied in the direction of heat exchanger shell, heat exchange equipment, lighting and heating equipment, etc., can solve the problems of long liquefaction time, large loss of cooling capacity during transmission, etc., to improve heat exchange efficiency and improve refrigeration Efficiency, the effect of improving heat exchange efficiency

Pending Publication Date: 2021-01-19
深圳市德佳外贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this liquefaction time is often relatively long, which leads to a large loss of total transport cooling capacity

Method used

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  • Heat exchanger capable of automatically defrosting or deicing
  • Heat exchanger capable of automatically defrosting or deicing
  • Heat exchanger capable of automatically defrosting or deicing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1-Figure 4 As shown, this embodiment provides a heat exchanger 1 capable of automatic defrosting or deicing, including coiled tubes 11 and finned plates 12 . Wherein, the brine can be passed into the coil tube 11, and the coil tube 11 is coiled in the same plane. The finned plate 12 includes a first finned plate 121 and a second finned plate 122, the first finned plate 121 is connected to the coiled tube 11 and surrounds the coiled tube 11, the first finned plate 121 and the coiled tube 11 are on the same plane Inside, the second finned plate 122 surrounds the first finned plate 121 and is spliced ​​with the first finned plate 121 in the same plane. The thermal conductivity of the second finned plate 122 is smaller than the thermal conductivity of the first finned plate 121 and the thermal conductivity of the coil 11 . Both the surface of the first fin plate 121 and the surface of the coiled pipe 11 are coated with a micron or nanoscale hydrophobic lay...

Embodiment 2

[0058] Such as Figure 5 As shown, this embodiment provides another heat exchanger 1 , the difference between the heat exchanger 1 provided by this embodiment and the first embodiment is that an upper insulation layer 16 is added on the basis of the first embodiment. Specifically, the heat exchanger 1 also includes an upper thermal insulation layer 16, which covers the upper surface of the coil tube 11 and the finned plate 12, and the thermal conductivity of the upper thermal insulation layer 16 is smaller than that of the coiled tube 11 and the first finned plate. 121 thermal conductivity. It should be pointed out that since the upper thermal insulation layer 16 covers the upper surface of the coiled tube 11 and the finned plate 12, it is only necessary to cover the lower surface of the coiled tube 11 and the first finned plate 121 with the hydrophobic layer 15 at this time.

[0059] When the heat exchanger 1 is placed vertically, that is, when the plate surface of the heat ...

Embodiment 3

[0061] For more controllable and easier removal of ice or frost layers from heat exchanger surfaces, it can be done in conjunction with a heat source. Such as Figure 6 As shown, this embodiment provides a controllable automatic defrosting or deicing heat exchanger system, based on the heat exchanger 1 provided in Embodiment 2, this system can be applied in refrigeration equipment such as refrigerators or freezers. The controllable automatic defrosting or deicing heat exchanger system provided in this embodiment includes a heat exchanger 1 , a switching valve 2 , and a low-temperature cold source and a high-temperature heat source 3 . The low-temperature cold source and the high-temperature heat source 3 are connected to the coil pipe 11 through the switch valve 2, so as to feed the brine or heat transfer agent into the coil pipe 11. Specifically, in this embodiment, the switching valve 2 is a four-way valve. In the deicing working condition, the low-temperature cooling sour...

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Abstract

The invention relates to the technical field of a heat exchanger, and discloses a heat exchanger capable of automatically defrosting or deicing. The heat exchanger comprises a coil pipe and fin plates. A refrigerating medium can be filled into the coil pipe, and the coil pipe is coiled in the same plane. The fin plates comprise the first fin plate and the second fin plate; the first fin plate surrounds the coil pipe, and is positioned int he same plane with the coil pipe; and the second fin plate surrounds the first fin plate, and is located in the same plane with the first fin plate. The heatconductivity coefficient of the second fin plate is smaller than those of the first fin plate and the coil pipe. Both the surfaces of the first fin plate and the coil pipe are coated with hydrophobiclayers, and the hydrophobic layers are hydrophobic coatings or hydrophobic oil films. Due to the lower heat conductivity coefficient of the second fin plate, frost layers or ice layers on both sidesof the coil pipe and the fin plates can be separated under the cold release working condition, so that the heat exchanger is prevented from being completely wrapped by the frost layers or the ice layers; and meanwhile, the hydrophobic layers are beneficial for enabling the frost layers or the ice layers to automatically fall off under the action of gravity, so that the heating defrosting process can be omitted, and the cold release heat exchange efficiency of the heat exchanger is improved.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a heat exchanger capable of automatic defrosting or deicing. Background technique [0002] With the improvement of people's living standards, the demand for energy is also increasing, such as heat pump heating in winter in the north, logistics cold supply chain, etc. The transmission of cold and heat here involves the use of heat exchangers. For conventional fluid medium heat transfer, high heat transfer efficiency can be achieved by increasing the thermal conductivity of heat exchanger materials, increasing the heat transfer area, and increasing the flow velocity of conventional fluids, which can respond to the national requirements for energy saving and emission reduction . However, some heat exchanger systems involve the phase change of the medium, especially the gas-solid and liquid-solid phase changes, and these situations often become complicated. Such as an impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/02F25B47/00F28F1/12F28F19/02F28F19/04F28F9/00F28F21/08F28F21/06
CPCF25B39/02F25B47/00F25B2339/02F28F1/12F28F9/00F28F19/02F28F19/04F28F21/062F28F21/081F28F2245/04
Inventor 勾艳芬陈奇良张文
Owner 深圳市德佳外贸有限公司
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