Control system for adjusting opening degree of electronic expansion valve

An electronic expansion valve and opening adjustment technology, which is applied to electric controllers, controllers with specific characteristics, etc., can solve problems such as inability to adjust in time, increase of overshoot, long response time, etc., and achieve insensitive model accuracy , improve stability and adaptability

Inactive Publication Date: 2019-02-22
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the temperature control of the heat pump air-conditioning system has large time-lag and large inertia characteristics, so that the controlled parameters cannot timely affect the adjustment effect and the state of the reaction system, resulting in increased overshoot, long response time and poor stability during the adjustment process. And other issues

Method used

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  • Control system for adjusting opening degree of electronic expansion valve
  • Control system for adjusting opening degree of electronic expansion valve
  • Control system for adjusting opening degree of electronic expansion valve

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Embodiment Construction

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0018] see figure 1 , an embodiment of the present invention is a control system for adjusting the opening degree of an electronic expansion valve, which includes an input terminal IN, a first multiplier 101, an electronic expansion valve 107, a feedback module 103, and a control system for controlling the opening degree of the electronic expansion valve 107. Smith fuzzy PID controller 105, evaporator 109 and output terminal OUT of control information, wherein, input terminal IN, first multiplier 101, Smith fuzzy PID controller 105, elec...

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Abstract

The invention discloses a control system for adjusting the opening degree of an electronic expansion valve so that an effective implementation plan of controlling the opening degree of an electronic expansion valve can be searched. The control system comprises an input terminal IN, a first multiplier, an electronic expansion valve, and a feedback module, a Smith fuzzy PID controller for generatingcontrol information for controlling the opening of the electronic expansion valve, an evaporator, and an output terminal OUT. The input terminal IN, the first multiplier, the Smith fuzzy PID controller, the electronic expansion value, the evaporator, and output terminal OUT are connected in sequence. According to the invention, a fuzzy controller applied to a fuzzy control algorithm to set control information of the PID controller in real time and a Smith predictor compensator for reducing the control lag of the electronic expansion valve are fused based on the PID controller. Therefore, thecontrol system has advantages of strong fuzzy control adaptability, insensitivity to model accuracy, and strong robustness and the like.

Description

technical field [0001] The invention relates to the field of air-conditioning heat pumps, in particular, the invention relates to a control system for adjusting the opening degree of an electronic expansion valve of an air-conditioning heat pump system. Background technique [0002] Electronic expansion valves are applied to automotive air-conditioning heat pump systems, which can better meet the needs of rapid changes in refrigerant flow. In the heat pump air conditioning system, the medium-temperature and high-pressure liquid refrigerant coming out of the condenser is expanded and throttled by the electronic expansion valve, and then becomes a low-pressure gas-liquid two-phase mixed refrigerant, and then enters the evaporator to absorb heat and evaporate into a gaseous state. into the compressor to complete a cycle. In addition to throttling and decompression, the role of the electronic expansion valve is to assist the compressor in regulating the flow rate to ensure an a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 黄俊锋苏林方奕栋李康程恰唐启天
Owner UNIV OF SHANGHAI FOR SCI & TECH
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