Detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and refrigerant

A plate heat exchanger and refrigerant technology, applied in indirect heat exchangers, heat exchange equipment, heat exchanger types, etc., can solve the problem of small single-plate heat transfer, poor pressure-bearing capacity of plates alone, unsuitable, etc. question

Inactive Publication Date: 2012-08-01
王英慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Once there is leakage inside the board replacement, it cannot be repaired, and the whole board replacement will be scrapped;
[0005] 2. The plates are in contact with each other, and the flow channel between the plates is very narrow. When there are solid impurities in the fluid, it is easy to block;
[0006] 3. For brazing plate replacement, it is welded in a vacuum brazing furnace, which is limited to the size of the brazing furnace, the size of the plate is relatively small, and the heat transfer of a single piece is relatively small
[0010] For the detachable plate replacement with gaskets, because each plate is sealed with gaskets, it is limited to the temperature and pressure that the gaskets can withstand, the aging of the gaskets, the compatibility of the gasket material and the refrigerant, etc. , the plate exchange with gasket seal is not suitable as a heat exchanger for refrigerant heat exchange
[0011] In addition, the shapes of the above various forms of plates are all corrugated (herringbone corrugations, spherical corrugations, etc.), and the plates have poor bearing capacity for individual pressure.

Method used

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  • Detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and refrigerant
  • Detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and refrigerant
  • Detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and refrigerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1, see Figure 1 to Figure 3 , the figure shows a typical plate heat exchange unit 15 (plate pair) structure, the plates 16 made of carbon steel, alloy steel, non-ferrous metals and their alloys are processed to a certain degree of concave and convex by stamping and other methods shape, and then the two plates 16 are stacked together, and the contact parts are integrally sealed and connected into a plate heat exchange unit 15 by means of laser welding, argon shielded arc welding, plasma arc welding, resistance welding or brazing—— Plate pair. The plates form refrigerant flow channels 17 inside to ensure that the internal fluid flows at a certain speed and along a certain direction. The plate pair is provided with refrigerant inlet and outlet.

[0044] In order to improve its pressure bearing capacity and enhance heat transfer, the internal refrigerant flow channel 17 of the plate pair can be designed and processed into different shapes according to the charact...

Embodiment 2

[0045] Example 2, see Figure 4 to Figure 6 , The plate heat exchange unit 15 can also be in another form—a whole plate integrally formed. The plate is melted with metal material and hollowed out inside to form the refrigerant flow channel 17 through a special process, or the metal material is melted and integrally cast on the prefabricated mold to form a complete refrigerant flow channel 17 inside. As mentioned above, the shape of the cross-section of the internal refrigerant flow channel can also be circular, elliptical, etc., and the inner surface of the flow channel and the outer surface of the plate can also be made smooth or ribbed with threads, bumps, etc. , to enhance heat transfer.

[0046] Heat exchanger scheme:

[0047] In the heat exchanger of the present invention, the plate heat exchange unit is used as the basic unit, and a plurality of plate heat exchange units placed in parallel are arranged according to the heat exchange requirements. Connected in a combin...

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PUM

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Abstract

The invention discloses a detachable plate heat exchanger for heat exchange of cold and heat source fluid such as sewage and a refrigerant. The detachable plate heat exchanger is characterized in that: independent sheet heat exchange units are arranged in a heat exchanger shell; a refrigerant flow channel is hermetically formed in the sheet heat exchange units; and adjacent sheet heat exchange units are arranged in parallel and a space is formed between the adjacent sheet heat exchange units. Compared with the conventional technologies, the sheet heat exchange units are independent of one another, the space of the sheet heat exchange units can be adjusted as required, the optimal heat exchange effect is guaranteed, and meanwhile, no blockage of the fluid is guaranteed; when a certain sheet heat exchange unit is damaged, repair or replacement can be timely performed, and the number of the sheet heat exchange units can also be adjusted as required to adapt to different working conditions.

Description

technical field [0001] The invention relates to a detachable plate heat exchanger for heat exchange between cold and heat source fluids such as sewage and refrigerant, which belongs to the cold (heat) source heat exchange system technology. Background technique [0002] Traditional plate heat exchangers have three structural forms: integral welded, semi-welded and detachable. Generally, the plate heat exchangers (hereinafter referred to as plate heat exchangers) used as the evaporator and condenser of the vapor compression unit are integrally welded and semi-welded; the plate heat exchangers used for water-water and steam-water heat exchange are gaskets. Sealed, with removable plates. Their respective limitations are: [0003] 1. Overall welding (including full welding and overall brazing) plate replacement [0004] 1. Once there is leakage inside the board replacement, it cannot be repaired, and the whole board replacement will be scrapped; [0005] 2. The plates are in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/00F28D9/00F28F3/00
Inventor 王英慧林绍风
Owner 王英慧
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