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Positive pressure-resistant, high-power flat-plate evaporator, its processing method, and flat-plate loop heat pipe based on the evaporator

A flat-plate loop, high-power technology, applied to lighting and heating equipment, indirect heat exchangers, etc., to reduce heat leakage, improve heat transfer capacity, and improve stability

Active Publication Date: 2020-03-03
BEIJING INST OF SPACECRAFT SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the present invention provides a positive pressure-resistant, high-power flat-plate loop heat pipe evaporator, which adopts a composite capillary core structure to improve heat transfer capacity, and solves the problem of compressive strength when the flat-plate loop heat pipe uses positive pressure working fluid. problems and technical issues for increasing heat transfer capability without increasing the thickness

Method used

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  • Positive pressure-resistant, high-power flat-plate evaporator, its processing method, and flat-plate loop heat pipe based on the evaporator
  • Positive pressure-resistant, high-power flat-plate evaporator, its processing method, and flat-plate loop heat pipe based on the evaporator
  • Positive pressure-resistant, high-power flat-plate evaporator, its processing method, and flat-plate loop heat pipe based on the evaporator

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Embodiment 1

[0053] This embodiment provides a high-power flat loop heat pipe evaporator with a positive pressure resistant structure, which adopts a composite capillary wick structure to improve heat transfer capacity, solves the problem of pressure resistance when the evaporator uses a positive pressure working fluid, and can Improve the heat transfer capacity without increasing the thickness.

[0054] The structure of the evaporator is as image 3 As shown, it includes: a shell 1 and a capillary core arranged inside the shell 1.

[0055] The structure of the housing 1 takes into account the requirements for the required strength of the positive pressure resistance and the uniform liquid supply function. The housing 1 is a rectangular structure with open ends and stiffeners 2 inside. Specifically, two reinforcing ribs 2 are arranged in parallel along the height direction of the housing 1, and the width of the reinforcing ribs 2 is consistent with the width of the housing 1. The reinforcing r...

Embodiment 2

[0061] This embodiment provides a method for processing a high-power flat loop heat pipe evaporator with a positive pressure resistant structure. The transmission core 6 in the evaporator is made of metal sintered felt or wire mesh.

[0062] The raw materials include shell, wire mesh or sintered felt, powder required for heat insulation core, powder required for evaporation core, powder required for sealing core, limit tooling, steam channel tooling.

[0063] (1) Vertically place the steam channel tooling (wire) on the boss on the upper surface of the limit tool, and then install the shell (reinforcement and shell as an integrated structure) on the boss on the upper surface of the limit tool (After the evaporator is processed, the space inside the shell occupied by the boss is the gas accumulation chamber), so that the steam channel tooling is located inside the shell, and the steam channel tooling is attached to the end surface of the shell. Such as Figure 8 Shown in A;

[0064] (...

Embodiment 3

[0072] This embodiment provides a method for processing a high-power flat loop heat pipe evaporator with a positive pressure resistant structure. The transmission core 6 in the evaporator is formed by powder sintering or pressing.

[0073] The raw materials include the shell, the powder needed for the transmission core, the powder needed for the heat insulation core, the powder needed for the evaporation core, the limiting tooling, the occupying tooling, and the steam channel tooling.

[0074] (1) Combine the limit tooling with the steam channel tooling (that is, place the steam channel tool vertically on the boss on the upper surface of the limit tool), and then install the shell on the boss on the upper surface of the limit tool. The steam channel tooling is located inside the shell, and the steam channel tooling is attached to one side of the shell, such as Picture 9 Shown in A;

[0075] (2) Fill the evaporating core with the required powder into the shell, with a thickness of 5...

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Abstract

The invention provides a positive-pressure-resistant, high-power flat-plate evaporator, a processing method thereof, and a flat-plate loop heat pipe based on the evaporator, which belong to the technical field of the spacecraft structure field. The evaporator includes a shell, reinforcing ribs and capillary wicks inside the shell, and the setting of the reinforcing ribs can ensure that the strength of the entire evaporator meets the requirement of positive pressure resistance. The capillary core is composed of four parts, which are evaporation core, heat insulation core, sealing core and transmission core. Through the high permeability of the transmission core, the liquid supply with low flow resistance can be realized, and the heat transfer capacity of the loop heat pipe can be greatly improved. The problem of long liquid supply path and large flow resistance caused by large area evaporator is solved. The low thermal conductivity transmission core and heat insulation core can reduce the heat leakage from the evaporator to the liquid reservoir, and at the same time have good permeability, reduce the flow resistance in the capillary core, and improve the operation stability of the product.

Description

Technical field [0001] The invention relates to a high-efficiency heat transfer element and a processing method thereof, in particular to a flat loop heat pipe evaporator and a processing method thereof, and belongs to the technical field of heat dissipation of spacecraft and other electronic equipment on the ground. Background technique [0002] Loop heat pipe is a kind of high-efficiency two-phase heat transfer equipment. It has high heat transfer performance, long-distance heat transfer, excellent temperature control characteristics, arbitrarily bendable pipeline, and convenient installation. With comparable advantages, loop heat pipes have very broad application prospects in many fields such as aviation, aerospace, and ground electronic equipment heat dissipation. [0003] Such as figure 1 As shown, the loop heat pipe mainly includes an evaporator, a condenser, a liquid reservoir, a vapor pipeline, and a liquid pipeline. The whole cycle process is as follows: the liquid evapor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D15/04
CPCF28D15/043F28D15/046F28D15/04
Inventor 李国广张红星满广龙王帅刘东晓
Owner BEIJING INST OF SPACECRAFT SYST ENG
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