How to adjust the superheat degree of electronic expansion valve
A technology of electronic expansion valve and adjustment method, which is applied in high-efficiency adjustment technology, lighting and heating equipment, refrigeration components, etc., can solve the problems of complex steps, small application range, and different energy-saving effects, and achieve simple steps and energy-saving effects Good results
Active Publication Date: 2019-03-22
HANGZHOU XIANTU ELECTRONICS
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Problems solved by technology
Among them, the control of fixed superheat is easy to realize, but its scope of application is small, and it is only suitable for fixed speed systems. In addition, the energy-saving effect under different loads is not the same; the minimum stable superheat control can achieve the best in most cases. Energy efficiency, but the implementation steps are more complicated, and the process of reaching the optimum superheat takes a long time
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] Such as figure 1 , figure 2 As shown, a method for adjusting the degree of superheat of an electronic expansion valve in the present invention comprises the following steps:
[0018] In this technical field, the system load is the load of the refrigeration and air-conditioning system, which can be read or obtained through the system, and the superheat degree of the system is based on information such as heat exchanger temperature and suction temperature, or suction pressure and suction temperature calculated;
[0019] Divide the system load into Q according to the size of the value 0 , Q 1 , Q 2 , Q 3 ,...Q n , forming Q 0 to Q 1 , Q 1 to Q 2 , Q 2 to Q 3 ,...Q n-1 to Q n n intervals; in this embodiment, the system load is divided into six intervals, Q 0 to Q 1 , Q 1 to Q 2 , Q 2 to Q 3 , Q 3 to Q 4 , Q 4 to Q 5...
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The invention discloses a method for adjusting the degree of superheat of an electronic expansion valve, comprising the following steps: dividing the system load into Q according to the value 0 , Q 1 , Q 2 , Q 3 ,...Q n , forming Q 0 to Q 1 , Q 1 to Q 2 , Q 2 to Q 3 ,...Q n to Q n n intervals; the target superheat is divided into TSH according to the size of the value 0 、TSH 1 、TSH 2 、TSH 3 、…TSH n , forming TSH 0 to TSH 1 、TSH 1 to TSH 2 、TSH 2 to TSH 3 、…TSH n to TSH n n intervals; make n system load values and n target superheat values correspond one-to-one; set a coordinate axis, and use n system load values and n target superheat values as X-axis coordinates and Y-axis coordinates to form Multiple coordinate values and connect the coordinate values; read the actual system load Q, get the actual system load Q in Q m‑1 to Q m interval, then the target superheat and adjust the target superheat to this value. The adjustment method has wide application range, good energy-saving effect, simple implementation steps and can quickly reach the optimum superheat degree.
Description
technical field [0001] The invention relates to the technical field of adjusting the superheat degree of an electronic expansion valve in a refrigeration and air-conditioning system, in particular to a method for adjusting the superheat degree of an electronic expansion valve. Background technique [0002] With the improvement of energy-saving and environmental protection requirements, electronic expansion valves are more and more widely used in air-conditioning systems due to their excellent characteristics. In the energy-saving control of the system, the adjustment effect of the superheat of the system is the key to the success of the application of the electronic expansion valve. In the prior art, there are mainly two methods for adjusting the superheat of the electronic expansion valve: fixed superheat control and minimum stable superheat (MSS). Among them, the control of fixed superheat is easy to realize, but its scope of application is small, and it is only suitable ...
Claims
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IPC IPC(8): F25B49/00F25B41/04F25B41/34
CPCF25B49/00F25B2600/2513F25B41/20F25B41/34Y02B30/70
Inventor 不公告发明人
Owner HANGZHOU XIANTU ELECTRONICS