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Part for increasing convective heat transfer coefficient of condensate, refrigerating system and cooling and heating air conditioner

A technology of convection heat transfer coefficient and condensate, which is used in evaporators/condensers, refrigerators, refrigeration components, etc., and can solve the problems of affecting the supercooling effect of condensate, reducing the flow rate U, and reducing the volume flow rate.

Inactive Publication Date: 2015-12-09
SHANGHAI BOHAN THERMAL ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the condensers of air conditioners and dehumidifiers, after the refrigerant gas is condensed into liquid, the volume flow rate is greatly reduced, and the flow rate U is greatly reduced, resulting in a serious deviation of the convective heat transfer coefficient α between the condensate at the end of the condenser and the inner wall of the pipeline. Low; the convective heat transfer coefficient α between the condensate at the end of the condenser and the inner wall of the pipeline is seriously low, which seriously affects the supercooling effect of the condensate

Method used

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  • Part for increasing convective heat transfer coefficient of condensate, refrigerating system and cooling and heating air conditioner
  • Part for increasing convective heat transfer coefficient of condensate, refrigerating system and cooling and heating air conditioner
  • Part for increasing convective heat transfer coefficient of condensate, refrigerating system and cooling and heating air conditioner

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Embodiment 1

[0044] The invention provides a component for improving the convective heat transfer coefficient of the condenser condensate, by implanting a component in the end pipeline of the condenser (such as a copper tube), focusing on improving the "condensation phase transition" of the refrigerant gas in the condenser After the "exothermic process", it enters the "supercooling stage" of the condensate, that is, the flow rate of the condensate entering the "end" of the condenser, increasing the Reynolds number of the condensate flow, reducing the thickness of the boundary layer, thereby reducing the heat flow at the end of the condenser from the inside The first stage of the outer three-stage heat transfer is "condensate in the pipeline → the inner surface of the pipeline", which restricts the overall three-stage heat transfer coefficient. The key stage of the low convective heat transfer coefficient of the condensate The thermal resistance (three-stage heat transfer at the end of the c...

Embodiment 2

[0052] The invention provides a refrigeration system, which includes a compressor, an evaporator, a throttling device and a condenser, and the compressor, the evaporator, the throttling device and the condenser are sequentially connected to form a circulation channel for refrigerant circulation; the end of the condenser The components as described in the first embodiment are arranged in the pipeline.

[0053] And because looking along the flow of the condenser pipeline, the condenser has to undertake the "exothermic cooling of the high-temperature superheated sensible heat part" and "condensation and exothermic liquefaction of saturated refrigerant gas" of the high-temperature and high-pressure refrigerant gas delivered by the compressor. " and "further cooling and subcooling of the condensate" such three-stage heat release tasks (compared with the previously mentioned "from the perspective of the section perpendicular to the refrigerant pipeline at the end of the condenser, fr...

Embodiment 3

[0063] refer to Figure 9 , the present invention provides a heating and cooling air conditioner, the heating and cooling air conditioner includes a compressor 4, a first heat exchanger 11, a throttling device 6 and a second heat exchanger 12, the compressor 4, the first heat exchanger 11, a throttling The device 6 and the second heat exchanger 12 are sequentially connected to form a cycle for refrigerant circulation; the compressor 4 is connected to the first heat exchanger 11 and the second heat exchanger 12 through a four-way valve 10, wherein the first heat exchanger 11 It is an indoor unit, and the second heat exchanger 12 is an outdoor unit. In the present invention, by adjusting the four-way valve 10, the first heat exchanger 11 is used as a condenser or the second heat exchanger 12 is used as a condenser. During cooling in summer, the second heat exchanger 12 of the outdoor unit is used as a condenser, and the first heat exchanger 11 of the indoor unit is used as an ev...

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Abstract

The invention provides a part for increasing the convective heat transfer coefficient of condensate, a refrigerating system comprising the part and a cooling and heating air conditioner. The part is embedded into a tail end pipe of a condenser and comprises a main rod. A plurality of outer grooves are formed in the outer surface of the main rod. A plurality of channels for the condensate to flow are formed between the outer grooves of the main rod and the inner surface of the pipe. By means of the part, the new heat bridge channels are provided for heat delivering from the condensate in direct contact with the part to the inner surface of the pipe, the flowing sectional area of the condensate in an existing pipe is greatly reduced, the flowing speed of the condensate is greatly increased, and therefore the Reynolds number of the condensate on the inner side of the tail end pipe of the condenser and the convective heat transfer coefficient of the condensate to the inner wall of the pipe are greatly increased.

Description

technical field [0001] The invention relates to the technical field of heat exchanger design, in particular to a component for improving the convective heat transfer coefficient of condenser condensate, a refrigeration system, and a heating and cooling air conditioner. Background technique [0002] In industrial production, the condensate condensed in the condenser usually needs to be further cooled, that is, "supercooled" before it can be discharged. The "supercooling" operation of condensate is an important step in the production process of condensate medium. [0003] In vapor compression refrigeration systems that have been more widely used (such as household air conditioners, dehumidifiers and commercial air conditioners), the subcooling degree of the condensate (refrigerant liquid) at the end of the condenser is the difference between the condensing temperature and the inlet of the throttling device. The temperature difference of the condensate has a significant impact...

Claims

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Application Information

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IPC IPC(8): F28F13/08F25B39/04F24F13/30
Inventor 薛世山马骥李成伟周孑民周萍王庆伦
Owner SHANGHAI BOHAN THERMAL ENERGY TECH
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