A control method for a gas heat pump multi-connected subcooling structure
A gas-fired heat pump and control method technology, which is applied in subcoolers, refrigerators, compressors, etc., can solve the problems of reduced system reliability, low heat exchange efficiency, and compressor liquid return, and achieve compact structure and improved heat exchange Efficiency and utilization improvement effect
Active Publication Date: 2021-02-19
NANJING TICA AIR CONDITIONING CO LTD
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Problems solved by technology
At present, the heat transfer efficiency of the existing heating downstream design is low, and most of them meet the product design by setting a larger subcooler, which not only increases the cost, but also easily causes the compressor to return liquid, reducing the system's operating efficiency. reliability
Method used
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Embodiment Construction
[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0019] Such as figure 1 As shown, a gas heat pump multi-connection system includes a refrigerant circulation circuit composed of a compressor 6, an oil separator 3, a four-way valve 2, an outdoor unit heat exchanger 1, an indoor unit heat exchanger 14 and a gas-liquid separator 7 , wherein the compressor 6 is connected to the gas engine 18 through a belt so as to obtain driving force. Preferably, the gas engine 18 can be 3GPH88. Described compressor 6 can select GHP5212MY2 for use. The indoor unit heat exchangers 14 are multiple groups connected in parallel, and each group of indoor unit heat exchangers 14 is provided with an indoor electronic expansion valve 15 to facilitate independent operation.
[0020] A subcooling assembly is provided between the outdoor unit heat exchanger 1 and the indoor unit heat exchanger 14 to improve operating efficiency...
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The invention relates to a control method of a gas heat pump multi-split supercooling structure. The control method involves a refrigerant circulating loop which is composed of a compressor, an oil separator, a four-way valve, an outdoor unit heat exchanger, an indoor unit heat exchanger and a gas-liquid separator; and a supercooling assembly which is composed of a supercooler, a refrigerant reversing device and a refrigerant electromagnetic valve is arranged between the outdoor unit heat exchanger and the indoor unit heat exchanger. The flow direction of a refrigerant can be adjusted, so it is guaranteed that the refrigerant inside the subcooler is in a countercurrent state all the time, and the heat exchange efficiency is improved. Meanwhile, the opening degree of a supercooling electronic expansion valve can be controlled by detecting the superheat degree of the subcooler and the superheat degree of compressor return air, so that the utilization rate of the subcooler is improved, and the liquid return risk of the system is reduced.
Description
technical field [0001] The invention relates to an air-conditioning control technology, in particular to a control method applied to multiple gas heat pumps, in particular to a control method for the supercooling structure of multiple gas heat pumps. Background technique [0002] Most of the existing gas heat pump multi-connected systems use a secondary subcooler to increase the system subcooling degree in order to connect longer connecting pipes. Especially in the heating environment, the performance of the subcooler has an increasingly important impact on the performance of the whole machine. At present, the heat transfer efficiency of the existing heating downstream design is low, and most of them meet the product design by setting a larger subcooler, which not only increases the cost, but also easily causes the compressor to return liquid, reducing the system's operating efficiency. reliability. Contents of the invention [0003] The purpose of the present invention ...
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IPC IPC(8): F25B40/02F25B13/00
CPCF25B13/00F25B40/02F25B2313/0233F25B2600/2513F25B2700/21151
Inventor 高嵩杨亚华杨兵
Owner NANJING TICA AIR CONDITIONING CO LTD