Electronic expansion valve control system and method

An electronic expansion valve and control system technology, which is applied in the electronic field, can solve the problems of liquid level control methods not being adopted and cost increase, and achieve the effect of reducing the risk of suction with liquid and the risk of low suction pressure
CN104634033AInactive Publication Date: 2015-05-20QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Publication Date
2015-05-20
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an electronic expansion valve control system which comprises sensors and a controller. A suction pressure sensor which is used for detecting suction pressure Ps and a suction temperature sensor which is used for detecting suction temperature Ts are arranged in a pipeline from an evaporator to a compressor, and an exhaust pressure sensor which is used for detecting exhaust pressure Pd and an exhaust temperature sensor which is used for detecting exhaust temperature Td are arranged in another pipeline from the compressor to a condenser; the controller takes a Ps signal, a Ts signal, a Pd signal and a Td signal collected through the sensors as criterion of control logic of the compressor and an electronic expansion valve. Accordingly, the advantages of controlling the degree of overheat of the suction and controlling the degree of overheat of the exhaust are combined, and at the same time the electronic expansion valve conducts control according to the suction pressure in a certain time after the compressor is stared up. The electronic expansion valve control system and method are used for controlling a water chilling unit, the stability of the electronic expansion valve control of the water chilling unit is guaranteed, the reliability of the water chilling unit is improved, and requirements of users for water chilling unit products are met.
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Description

technical field

[0001] The invention relates to the field of electronic technology, in particular to an electronic expansion valve control system, and also to an electronic expansion valve control method. Background technique

[0002] With the development of domestic and foreign economies, there are more and more large-scale public buildings, factories, and residential applications, and a large number of places have strong demand for chillers.

[0003] When people need chillers, the stability of the product is one of the basic requirements. Generally, according to the condensation method, chillers can be divided into water-cooled chillers and air-cooled chillers. Whether it is an air-cooled chiller or a water-cooled chiller, the main control components are the compressor, expansion valve (throttle device), etc., and the control of the expansion valve is very important in terms of system stability.

[0004] Traditional expansion valves include electronic expansion valve (EXV...

Claims

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