Composite falling film evaporator and refrigerating device
A falling film evaporator and composite technology, 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: 2021-01-22
NANJING NORMAL UNIVERSITY
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- Application Information
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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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Examples
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Comparison scheme
Effect test
Embodiment Construction
[0020] The present invention will be further described in detail below in conjunction with the examples.
[0021] like 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 slee...
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Abstract
The invention discloses a composite falling film evaporator and a refrigerating device. The composite falling film evaporator mainly comprises a sleeve module, a liquid distributor, a refrigerant inlet, a refrigerant outlet, a chilled water inlet, a chilled water outlet, a lubricating oil collection bag and a shell, wherein a refrigerant exchanges heat with chilled water in an outer pipe in an inner pipe of the sleeve 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 pipe of thesleeve and then fed into the falling film liquid distributor to be subjected to gas-liquid separation, and the separated liquid refrigerant is subjected to secondary falling film evaporation on the outer surface of the sleeve after being uniformly distributed. According to the composite falling film evaporator and the refrigerating device, the heat exchange area of a conventional dry-type evaporator can be reduced by about 15%-25%, the size is reduced by about 30%, and the overall manufacturing cost of the evaporator can be greatly reduced.
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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Patent Timeline
Login to View More IPC IPC(8): F25B39/02F25B1/00F25B31/00F25B43/00F25B43/02
CPCF25B39/02F25B1/00F25B31/004F25B43/02F25B43/00
Inventor 李应林龚晨牛宝联夏学鹰
Owner NANJING NORMAL UNIVERSITY