Stainless steel plate type heat exchanger and processing molding method thereof

A technology of plate heat exchanger and stainless steel plate, which is applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problem that plate heat exchangers are prone to deformation and warpage, refrigerant and condensing oil are easy to accumulate, and stainless steel linear expansion coefficient Large and other problems, to achieve the effect of improving welding efficiency, improving work effect, and reducing refrigerant flow resistance

Inactive Publication Date: 2010-04-07
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large number of welds and dense distribution on the plate heat exchanger, the welding heat input of ordinary resistance welding method is relatively large, and because of the large linear expansion coefficient and low thermal conductivity of stainless steel (about 17w/m×k

Method used

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  • Stainless steel plate type heat exchanger and processing molding method thereof
  • Stainless steel plate type heat exchanger and processing molding method thereof
  • Stainless steel plate type heat exchanger and processing molding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0065] Example 1:

[0066] See figure 1 with figure 2 , Two 304L stainless steel plates 1.5m long, 0.8m wide and 1.2mm thick are processed and treated, the inner and outer surfaces of the stainless steel plates are surface shot peened and nano-treated, and the laminated inner surface is mechanically micro-rolled The surface micro-patterns are formed, and the current-carrying friction stir welding method is adopted. The welding process of two stainless steel plates with a rotation speed of 2000r / min, a welding speed of 120mm / min and a current-carrying current of 2KA will weld two stainless steel plates with a total of 880 equidistant points. Honeycomb solder joints, 4 isolated welds with a length of 1300mm, and sealed welding around the plates; the aluminum-copper composite inlet pipe and the aluminum-copper composite outlet pipe are sealed and connected to the stainless steel evaporation plate body by arc welding; the inflation positioning mold is adopted, The stainless steel ev...

Example Embodiment

[0067] Example 2:

[0068] See figure 1 with image 3 , Two pieces of 316 stainless steel with a length of 1.5m, a width of 0.8m and a thickness of 1.3mm are processed and treated, the inner and outer surfaces of the stainless steel plate are subjected to surface shot peening nano-treatment, and the laminated inner surface is formed by mechanical micro-rolling Surface micro-pattern, using laser welding method, with a power of 1200W, a welding speed of 1.8m / min, and a decay rate of 30%. The welding process of two stainless steel plates is welded with fourteen equal-space welds every 5ms into a middle weld. The aluminum-copper composite inlet pipe and the aluminum-copper composite outlet pipe are sealed and connected with the stainless steel condensing plate body by arc welding; the inflating positioning mold is used to bulge the stainless steel evaporating plate through high-pressure gas. It is formed into a serpentine runner type evaporation plate with semi-cylindrical curved and...

Example Embodiment

[0069] Example 3:

[0070] See figure 1 with image 3 , Two pieces of 18-8 stainless steel 1.5m in length, 0.8m in width and 1.1mm in thickness are processed and treated, the inner and outer surfaces of the stainless steel plate are subjected to surface shot peening nano-treatment, and the laminated inner surface is mechanically micro-rolled The surface micro-pattern is formed by pressing water-cooled resistance welding method. The fourteen equal-space weld beads of two stainless steel plates are welded into the middle bead with a welding current of 8KA, a welding speed of 45cm / min, and an electrode pressure of 5KN. And the surroundings are sealed and welded; the aluminum-copper composite inlet pipe and the aluminum-copper composite outlet pipe are sealed and connected with the stainless steel condensing plate body by arc welding; the inflating positioning mold is used to expand the stainless steel evaporating plate by high-pressure gas to make it It is formed into a serpentine r...

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Abstract

The invention discloses a stainless steel plate type heat exchanger and a processing molding method thereof. The plate type heat exchanger comprises a snakelike flow channel type and honeycomb flow channel type evaporation plate or a cold plate. The plate type heat exchanger adopts a stainless steel plate and consists of a stainless steel upper plate, a stainless steel lower plate, an inlet pipe and an outlet pipe, wherein the two stainless steel plates are overlapped and connected by a special welding method; the inlet pipe and the outlet pipe are inserted in the upper end and the lower end between the two stainless steel plates and are connected with the stainless steel plate type heat exchanger body by using an electric arc welding method; and then the plate type heat exchanger is finally molded through a mould and high-pressure bulging technology.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a stainless steel plate heat exchanger and a processing and forming method thereof. Background technique [0002] The refrigeration system is inseparable from the heat exchanger. The plate heat exchanger includes an evaporating plate and a condensing plate. The traditional plate heat exchanger mainly has a serpentine flow channel type and a honeycomb type evaporating plate or condensing plate. The ordinary evaporating plate or condensing plate Generally, two 1-3mm thick 304 stainless steel plates with a length of 1.2-1.8m and a width of 0.5-1.2m are processed into a serpentine flow channel or a honeycomb flow channel by ordinary resistance welding. Carry out bulging to form serpentine flow channel and honeycomb flow channel heat exchangers, allowing refrigerant (such as R-22 or ammonia) to flow in hollow flow channels. Due to the large number of weld beads and dense distributio...

Claims

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Application Information

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IPC IPC(8): F25B39/00F28F21/08B23P15/26B23K20/12B23K26/20B23K26/42B23K11/11B23K11/08B21D37/01B23K26/244B23K26/70
Inventor 罗键王颖
Owner CHONGQING UNIV
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