A microchannel heat pump circuit of a pre-evaporation gas-liquid separation device
A technology of a gas-liquid separation device and a microchannel heat exchanger, which is applied in the field of heat pumps, can solve problems such as uneven distribution and reduced system efficiency, and achieve the effect of ensuring heat exchange effect and improving heat exchange efficiency
Active Publication Date: 2018-08-17
浙江豪瓦特节能科技有限公司
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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 heat pump 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 system
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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0042] The schematic diagram of the system cycle of the present invention is as figure 1 As shown, when used as a refrigeration circuit: 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 first microchannel heat exchanger 3 for condensation and heat exchange, and the refrigerant changes from a high-pressure gaseous state to into a high-pressure liquid state; the high-pressure liquid refrigerant enters the first capillary throttling device 5, and changes from a liquid state to a gas-liquid mixed state after throttling and depressurization, flows through the first bypass valve 6 and the second four-way valve 7, and then flows into the first The gas-liquid separation device 10, and then the refrigerant...
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The invention discloses a microchannel heat pump circuit of a pre-evaporation gas-liquid separation device. device, the first bypass pipe, the first three-way valve, the second four-way valve, the second capillary throttling device, the second bypass pipe, the second three-way valve, the first gas-liquid separation device, and the third capillary section Flow device, the second microchannel heat exchanger (including flute-type liquid pipe), the second gas-liquid separation device, wherein the microchannel heat exchanger is used as a microchannel evaporator when a gas-liquid separation device is placed in front, so that the gas entering the microchannel The refrigerant in the evaporator is guaranteed to be liquid, which is conducive to the uniform liquid separation of the micro-channel evaporator, ensuring the cooling effect of the refrigeration circuit and improving the heat exchange efficiency.
Description
technical field [0001] The invention belongs to the field of heat pumps, in particular to a microchannel heat pump circuit of a pre-evaporation gas-liquid separation device. 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 heat pump 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 The uniformity has a great impact on the performance of the system, which greatly reduces the efficiency of the system. [0003] In the traditional...
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IPC IPC(8): F25B13/00F25B41/06F25B41/04F25B43/00F25B41/20F25B41/37
CPCF25B13/00F25B43/00F25B2400/23F25B2313/027F25B41/37F25B41/20
Inventor 张忠斌姚喻晨吴琦琦
Owner 浙江豪瓦特节能科技有限公司