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A compound falling film evaporator and refrigeration device

A falling film evaporator and composite technology, which is applied in the direction of evaporator/condenser, refrigerator, refrigeration components, etc., can solve the problems of affecting commercial competition, increasing the manufacturing cost of heat exchangers, and unfavorable miniaturization of evaporators. Achieving effects that are conducive to miniaturization, performance improvement, and cooling capacity loss avoidance

Active Publication Date: 2021-12-07
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method increases the manufacturing cost of the heat exchanger and does not take advantage of the miniaturization of the evaporator design, which greatly affects the commercialization of the dry evaporator with the flooded evaporator or falling film evaporator in the market. compete

Method used

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  • A compound falling film evaporator and refrigeration device
  • A compound falling film evaporator and refrigeration device

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the examples.

[0021] Such as figure 1 As shown, a compound falling film evaporator of this embodiment mainly includes: casing module, liquid distributor 102, chilled water inlet 111, chilled water outlet 110, refrigerant inlet 107, refrigerant outlet 114, lubricating oil collection bag 106 , gas outlet 105 and housing 101 , etc., the gas outlet 105 is located at the top of the housing 101 , and the lubricating oil collection bag 106 is located at the bottom of the housing 101 .

[0022] The liquid distributor 102 is located in the upper area of ​​the housing 101, and the bushing module is located in the lower area of ​​the housing 101, consisting of a bushing array and several connecting pipes; the bushing array is formed by a plurality of bushings, and a single bushing It consists of an outer tube 103 and an inner tube 104 nested together. The entrance of the outer pipe 103 in the s...

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Abstract

The invention discloses a composite falling film evaporator and a refrigeration device, which mainly include a casing module, a liquid distributor, a refrigerant inlet, a refrigerant outlet, a frozen water inlet, a frozen water outlet, a lubricating oil collection bag and a housing, and the refrigerant is first In the inner tube of the bushing, it exchanges heat with the chilled water in the outer tube to perform dry evaporation. When the dryness of the refrigerant rises to a certain value, the remaining gas-liquid two-phase refrigerant is discharged from the inner tube of the bushing, and then sent to into the falling film liquid distributor for gas-liquid separation, and the separated liquid refrigerant is evenly distributed, and then undergoes secondary falling film evaporation on the outer surface of the casing. The invention can reduce the heat exchange area of ​​the conventional dry evaporator by about 15-25%, reduce the volume by about 30%, and can greatly reduce the overall manufacturing cost of the evaporator.

Description

technical field [0001] The invention relates to heat exchange equipment and a refrigeration device, in particular to a heat exchanger and a refrigeration device in a refrigeration and air-conditioning system. Background technique [0002] As a commonly used evaporative heat exchange equipment, dry evaporator has been widely used in refrigeration and air conditioning equipment in various industries. In its practical application, due to insufficient subcooling of the refrigerant in the condenser, flash gas will be generated when the refrigerant passes through the throttling device, and the liquid refrigerant becomes a low-pressure gas-liquid two-phase fluid after passing through the throttling device. When the gas-liquid two-phase low-pressure refrigerant enters the dry evaporator, on the one hand, during the flow of the gas-liquid two-phase refrigerant in the tube, there is a stratification phenomenon, and a large amount of liquid-phase refrigerant gathers at the bottom of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/02F25B1/00F25B31/00F25B43/00F25B43/02
CPCF25B1/00F25B31/004F25B39/02F25B43/00F25B43/02
Inventor 李应林龚晨牛宝联夏学鹰
Owner NANJING NORMAL UNIVERSITY
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