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A heat exchange unit with switchable evaporator and loop heat pipe

A heat exchange unit, loop heat pipe technology, used in evaporators/condensers, lighting and heating equipment, refrigerators, etc., can solve problems such as low evaporation temperature and energy loss

Active Publication Date: 2020-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the heat pump cycle of a heat pump dryer, in order to make the dehumidification effect better, the evaporation temperature is generally lower, and the air is cooled and dehumidified before being heated, which brings unnecessary energy loss

Method used

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  • A heat exchange unit with switchable evaporator and loop heat pipe
  • A heat exchange unit with switchable evaporator and loop heat pipe
  • A heat exchange unit with switchable evaporator and loop heat pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A heat exchange unit with switchable evaporator and loop heat pipe, its structure is as follows figure 1 As shown, it includes the main heat exchanger 2, the precooling heat exchanger 1 and the reheating heat exchanger 3, and the heat exchange fluid channels 8 of the precooling heat exchanger 1, the main heat exchanger 2 and the reheating heat exchanger 3 are sequentially The refrigerant heat exchange channels of the pre-cooling heat exchanger 1, the main heat exchanger 2 and the reheating heat exchanger 3 form an independent evaporator mode or a combination mode of the evaporator plus a loop heat pipe, wherein the pre-cooling heat exchanger 1 , The main heat exchanger 2 and the reheat heat exchanger 3 are finned tube heat exchangers.

[0029] The inlet of the heat exchange fluid passage 8 is arranged on the precooling heat exchanger 1 , and the outlet of the heat exchange fluid passage 8 is arranged on the reheat heat exchanger 3 . The fluid flowing in the heat exchan...

Embodiment 2

[0034] The same connection method is used in Example 1, the difference is: the inlet 101 of the refrigerant heat exchange channel is connected to the second port 72 of the No. 4 three-way valve, and the outlet 102 of the refrigerant heat exchange channel is connected to the No. 1 three-way valve. The connection to port 1, specifically as Figure 4 shown.

[0035] Compared with Example 1, only the connection sequence of the refrigerant channels of the precooling heat exchanger 1, the main heat exchanger 2, and the reheating heat exchanger 3 has changed, and the functions remain unchanged.

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Abstract

The invention relates to an evaporator and loop heat pipe switchable heat exchange unit. The evaporator and loop heat pipe switchable heat exchange unit comprises a main heat exchanger, a precooling heat exchanger and a reheating heat exchanger; heat exchange fluid channels of the precooling heat exchanger, the main heat exchanger and the reheating heat exchanger are sequentially connected in series, and refrigerating fluid heat exchange channels of the precooling heat exchanger, the main heat exchanger and the reheating heat exchanger are sequentially communicated through refrigerating fluid connecting pipes, and an independent evaporator manner or an evaporator and loop heat pipe combined manner are formed through switching of refrigerating fluid pipes. Compared with the prior art, four three-way valves are used for achieving switching of the independent evaporator manner and the evaporator and loop heat pipe combined manner under different conditions, and unnecessary energy losses of the system are reduced.

Description

technical field [0001] The invention relates to a heat exchange unit, in particular to a heat exchange unit in which an evaporator and a loop heat pipe can be switched. Background technique [0002] The heat pipe is a new type of heat transfer element. The main principle is to use the phase change process of the medium condensing at the cold end after evaporating at the hot end (that is, using the latent heat of evaporation and latent heat of condensation of the liquid) to conduct heat quickly, and its heat conduction capacity exceeds any The thermal conductivity of metals is known. The loop heat pipe is a high-efficiency phase change heat transfer device. It is composed of an evaporator and a condenser. It is connected into a loop through a gas-liquid transmission pipeline. It uses the evaporation and condensation of the working fluid to transfer heat. A large amount of heat is transferred over a long distance. Loop heat pipes have become the heat transfer element of choi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/02F25B39/00
CPCF25B39/00F25B39/02
Inventor 张春路刘洪鑫曹祥邵亮亮
Owner TONGJI UNIV