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Microchannel refrigerating circuit

A refrigeration circuit and microchannel technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as uneven distribution and reduced efficiency of refrigeration systems, and achieve the effect of uniform liquid separation

Inactive Publication Date: 2016-11-23
NANJING NORMAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, microchannel heat exchangers are widely used in automotive air conditioners, commercial air conditioners, computer room air conditioners and other fields, mainly as condensers. When traditional microchannel heat exchangers are used as refrigeration system evaporators, due to the refrigerant in each flat tube The density of the gas-liquid two-phase refrigerant in the microchannel is different, resulting in very uneven distribution. The phenomenon of "dry evaporation" and "excessive liquid supply" are very common among the microchannels of the flat tubes of the heat exchanger, and the uneven distribution of the refrigerant Uniformity has a great impact on the performance of the system, which greatly reduces the efficiency of the refrigeration system

Method used

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] In the figure: 1-compressor; 2-microchannel condenser; 3-first fan; 4-first capillary throttling device; 5-gas-liquid separation device; 6-microchannel evaporator; 7-second fan ; 8-the second capillary throttling device; 61-flute-type liquid pipe.

[0025] The schematic diagram of the system cycle of the present invention is as Figure 1 ~ Figure 4 As shown, the low-temperature and low-pressure refrigerant enters the compressor 1, is compressed to a high-pressure gaseous state and flows out, and the high-pressure gaseous refrigerant enters the microchannel condenser 2 for condensation and heat exchange, and the refrigerant changes from a high-pressure gaseous state to a high-pressure liquid state; the high-pressure liquid refrigerant Entering the first capillary throttling device 4, after throttling and decompression, the liqu...

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Abstract

The invention discloses a microchannel refrigerating circuit. The circuit comprises a compressor, a microchannel condenser, a first capillary throttling device, a gas-liquid separation device, a microchannel evaporator (comprising a flute type liquid distribution pipe) and a second capillary throttling device, wherein one gas-liquid separation device is arranged in front of the microchannel evaporator, so that a refrigerant entering the microchannel evaporator is ensured to be in a liquid state, uniform liquid distribution of the microchannel evaporator is facilitated, the refrigerating effect of the refrigerating circuit is guaranteed, and the heat exchange efficiency is improved.

Description

technical field [0001] The invention belongs to the refrigeration field and relates to a microchannel refrigeration circuit. Background technique [0002] At present, microchannel heat exchangers are widely used in automotive air conditioners, commercial air conditioners, computer room air conditioners and other fields, mainly as condensers. When traditional microchannel heat exchangers are used as refrigeration system evaporators, due to the refrigerant in each flat tube The density of the gas-liquid two-phase refrigerant in the microchannel is different, resulting in very uneven distribution. The phenomenon of "dry evaporation" and "excessive liquid supply" are very common among the microchannels of the flat tubes of the heat exchanger, and the uneven distribution of the refrigerant Uniformity has a great influence on the performance of the system, which greatly reduces the efficiency of the refrigeration system. [0003] In the traditional micro-channel refrigeration cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B41/00F25B41/06F25B43/00F25B39/02F25B41/37F25B41/40
CPCF25B1/00F25B39/028F25B43/00F25B2339/02F25B41/40F25B41/37
Inventor 张忠斌姚喻晨吴琦琦
Owner NANJING NORMAL UNIVERSITY
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