Improved low temperature heat pipe heat exchanger

Abstract

The invention discloses an improved low-temperature heat pipe heat exchanger and its manufacturing process. Composed of bolts, multiple rectangular aluminum plate fins are superimposed into a rectangular cube form with gaps between them. There is a middle partition in the middle. Insert the aluminum tube, expand the thick aluminum tube by the tube expander, and tightly fit the aluminum plate fins and the middle partition. The heat body is fixed in the shell composed of upper and lower frames, side frames, end plates, cover plates, and joint plates through fastening bolts. The middle partition divides the inner space of the shell into two sealed areas: air inlet and air exhaust. The invention has the advantages of small volume of the heat exchanger, simple manufacturing process, low manufacturing and use costs, high heat recovery efficiency, reduced environmental heat pollution by emission, and is convenient for popularization and use.

Description

Technical field: [0001] The invention relates to the technical field of low-temperature heat pipes in heat conduction technology, in particular to an improved low-temperature heat pipe heat exchanger. Background technique: [0002] As we all know, central air-conditioning facilities are equipped in various buildings where people live, work and study, such as large-scale commercial buildings, office buildings, hotels, workshops, etc., and industrial drying equipment is also widely used in various industrial fields. Centralized air-conditioning The role of air conditioning is to maintain a fresh indoor living or working environment, and it is necessary to remove harmful substances produced in living activities and production operations and introduce fresh outdoor air. Industrial drying equipment should also remove the hot and humid air after drying, and introduce heated dry air outside to supplement. When centralized air conditioners and industrial drying equipment perform he...

AI Technical Summary

Problems solved by technology

When centralized air conditioners and industrial drying equipment perform heat exchange work, a large amount of heat energy will be removed, which not only wastes heat energy, but also brings thermal pollution to the environment. With the continuous improvement of people's living standards and the vigorous development of industry, this The problem is becoming more and more serious. In order to recycle the energy contained in central air conditioners and industrial drying equipment, various heat exchangers using the principle of heat exchange are constantly appearing in this technical field to try to solve this problem, but the heat exchangers of the prior art Due to low heat exchange efficiency, high manufacturing and use costs, it has not been vigorously promoted and applied. The gas-gas heat exchangers in the prior art are generally divided into rotary heat exchangers, plate heat exchangers and heat pipe heat exchangers. The heat recovery efficiency of the wheel heat exchanger is relatively high. The disadvantage is that due to the rotation of the wheel core, each part of the wheel is alternately exposed to the fresh air and the exhaust air. Explosive dust and gas, and other harmful substances) will be adsorbed in the wheel core when in contact, and when this part of the wheel core is turned to the fresh air side due to the rotation of the wheel, bacteria, stench, explosive dust and gas, and other harmful substances are transferred to the fresh air, polluting the fresh air; at the same time, the moisture adsorbed in the wheel core will freeze when encountering cold fresh air to damage the runner; in addition, the wheel is a rotating part, and the seal is not tight enough, so it is inevitable that the exhaust air will be harmful. The material leaks to the side where the fresh air is sucked in. In addition, there are disadvantages of high maintenance costs, power requirements, and high prices; the plate heat exchanger dissipates heat through multi-layer heat sinks, and the exhaust air is directly transferred by metal plates, so the heat recovery efficiency is not as good as The rotary heat exchanger is high, but at the same time, it has the disadvantages of high maintenance cost, high price, large volume, large resistance loss and low heat recovery efficiency; while the heat pipe heat exchanger, although the heat recovery efficiency is slightly lower than the rotary heat exchanger , but higher than the plate heat exchanger, and because the heat pipe heat exchanger is heat transfer by the liquid working fluid in the tube, there is no cross-contamination, the new and exhaust rooms are strictly sealed, and flow in their respective air channels without mutual leakage It is relatively hygienic and safe to freeze with fresh air. However, the current general-purpose low-temperature heat pipe heat exchanger still has the problems of complicated manufacturing process, high cost and low heat recovery efficiency. The device discloses a heat pipe heat exchanger, which is a single heat pipe element made by rolling an aluminum tube with extended cooling fins on the outside of the tube and multiple heat-absorbing grooves on the inner wall. The side triangles are arranged in bundles and installed in the frame shell. The tubes are filled with liquid working fluid. Each heat pipe element is separated by a middle partition to form two areas of fresh air and exhaust air to realize heat exchange. Due to the heat dissipation of the rolled aluminum tube outer wall The area of ​​the fins is not large, so there must be gaps between the rows and columns, so that the heat dissipation area is reduced, the fins cannot increase the ripples, and the heat recovery efficiency is low. During manufacture, each tube needs to be vacuumed, vacuum baked and filled with liquid, which cannot be completed. Batch production, high manufacturing costs, these shortcomings limit the popularization and application of low-temperature heat pipe heat exchangers, how to improve the shortcomings of existing low-temperature heat pipe heat exchangers, improve heat recovery efficiency, simplify the manufacturing process, reduce manufacturing and use costs, and facilitate promotion Application is an urgent problem to be solved in this field

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