Low temperature heat pump system and its control method for reversing valve
A control method and reversing valve technology, which is applied to heat pumps, refrigerators, refrigeration components, etc., can solve the problem of not being able to detect whether the reversing valve is in place, and achieve the effect of easy setting and simple logic
Active Publication Date: 2021-03-02
ZHEJIANG ZHONGGUANG ELECTRIC CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to address the above problems, provide a low temperature heat pump system with reasonable design, which solves the problem that the reversing valve cannot be detected when the cooling mode and the heating mode are switched to each other.
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[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.
[0032] Such as Figures 1 to 2As shown, the low-temperature heat pump system includes a compressor 602 connected by a refrigerant pipeline 601, an air heat exchanger 603 installed in the outer room, and a water-side heat exchanger 604 installed in the room. The restrictor 605 and the accumulator 606 between the side heat exchangers 604, the refrigerant inlet port on the compressor 602, the refrigerant outlet port, a refrigerant port on the air heat exchanger 603 and the refrigerant port on the water side heat exchanger 604 One refrigerant port is respectively connected to the S terminal, D terminal, C terminal and E terminal on the reversing valve 607. The system also includes a circuit controller, which is electric...
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The invention provides a low-temperature heat pump system and a control method for a reversing valve thereof, belonging to the technical field of refrigeration air-conditioning and low-temperature heat pumps. It solves the problems of unreasonable design and the like in the prior art. The low-temperature heat pump system and its control method for the reversing valve include a compressor connected by a refrigerant pipeline, an air heat exchanger installed in the outer room, and a water-side heat exchanger installed in the room. The restrictor and liquid receiver between the heat exchangers, the refrigerant inlet port on the compressor, the refrigerant outlet port, a refrigerant port on the air heat exchanger, and a refrigerant port on the water side heat exchanger are connected with the reversing valve respectively. The S-terminal, D-terminal, C-terminal and E-terminal on the board are connected one by one. The advantage of this low temperature heat pump system and its control method for its reversing valve is that it can judge whether the reversing valve in the system is in place by detecting the comparison between the suction temperature and the temperature on the heat source side, so as to avoid the compressor from entering the internal protection and causing serious damage. affect the user experience.
Description
technical field [0001] The invention belongs to the technical field of refrigeration air conditioners and low-temperature heat pumps, and in particular relates to a control method for a low-temperature heat pump system and a reversing valve thereof. Background technique [0002] The air-conditioning heat pump units used in cold winter and warm summer conditions in the north must not only meet the cooling needs in summer, but also meet the low-temperature heating requirements in winter. Due to the large temperature span of the operating environment, it is difficult for the four-way reversing valve to take into account both cooling and cooling. Refrigerant circulation flow requirements for heating, when starting at low temperature or defrosting, there may be a problem that the reversing valve is not in place. At present, there is generally no control for the reversing valve in the detection system. When the direction is not in place, the suction temperature rises rapidly, and ...
Claims
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IPC IPC(8): F25B30/02F25B49/02
Inventor 喻宝生汪卫平袁晓军朱建军
Owner ZHEJIANG ZHONGGUANG ELECTRIC CO LTD