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Method for controlling electronic expansion valve of variable-frequency air conditioner

A technology of electronic expansion valve and variable frequency air conditioner, which is applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve problems such as untimely and reliable adjustment, product shutdown, and component damage, so as to reduce time and reduce Effect of load and reduction of discharge pressure

Active Publication Date: 2011-08-10
CHINA YANGZI GRP CHUZHOU YANGZI AIR CONDITIONERCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, parts of the product may be damaged or the product may stop operating.
Moreover, when the air conditioner is running, since the electronic expansion valve is in the standard state, the opening value of the electronic expansion valve is adjusted according to the temperature difference between the outdoor discharge temperature and the indoor heat exchanger temperature. Causes misjudgment and cannot be adjusted in a timely and reliable manner

Method used

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  • Method for controlling electronic expansion valve of variable-frequency air conditioner
  • Method for controlling electronic expansion valve of variable-frequency air conditioner
  • Method for controlling electronic expansion valve of variable-frequency air conditioner

Examples

Experimental program
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Effect test

Embodiment

[0040] Example: Combined image 3 , if the inverter air conditioner is powered on, the initialization of the electronic expansion valve will be completed while the power is turned on, and the opening value of the electronic expansion valve will move from the current opening value to the minimum opening value to the maximum pulse value, and the The opening at this time is "zero", which is used as the numerical benchmark for all control electronic expansion valves, and then the opening value of the electronic expansion valve is adjusted to the middle opening value pm on the basis of this "zero".

[0041]When the user starts to use the air conditioner, the frequency conversion air conditioner starts to run, the air conditioner controller receives the instruction from the user, determines the running state of the air conditioner according to the requirements of the instruction, and the compressor starts to run.

[0042] When the compressor starts to compress the refrigerant, the c...

example

[0058] When the inverter air conditioner is powered on, the initialization of the electronic expansion valve is completed at the same time as the power is turned on, and the opening value of the electronic expansion valve is moved from the current opening value to the minimum opening value to the maximum pulse value, and at this time The opening of the valve is "zero", which is used as the numerical benchmark for all electronic expansion valves. Then on the basis of this "zero", the opening value of the electronic expansion valve is set as the middle opening value of 250 pulses [pulse].

[0059] When the user starts to use the air conditioner, the inverter air conditioner starts to run, and the air conditioner controller receives the user's instruction, and determines the operating state of the air conditioner according to the instruction: in cooling mode, the compressor starts to run.

[0060] When the compressor starts to compress the refrigerant, the controller will calcula...

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Abstract

The invention discloses a method for controlling an electronic expansion valve of an air conditioner, which comprises initial aperture control and refrigerant target exhaust temperature control. When the air conditioner starts to operate, the electronic expansion valve is in an aperture after initialization, thereby being beneficial to the flow of a refrigerant, effectively reducing the exhaust pressure of the refrigerant, realizing the movement from the aperture after initialization to a target aperture value, shortening the stroke from the minimum aperture to the target aperture value, and effectively shortening the operating time. After the air conditioner operates, the aperture of the electronic expansion valve can be adjusted according to the outdoor air temperature which is measuredby a machine, the exhaust temperature of the refrigerant and the operating efficiency of a compressor, thus the aperture of the electronic expansion valve is controlled to be the optimum aperture value, the exhaust temperature of the refrigerant is effectively reduced, and the exhaust pressure of the refrigerant and the load of the air conditioner are reduced.

Description

Technical field: [0001] The invention relates to a method for controlling the operation of an inverter air conditioner, in particular to a method for controlling the opening value of an electronic expansion valve when the inverter air conditioner is running. Background technique: [0002] Generally, an air conditioner performs a cooling cycle or a heating cycle after receiving an instruction from a user. It performs a cooling cycle in hot summer to keep the room cool, and performs a heating cycle in cold winter to warm the room, and can adjust the indoor air. Humidity, let the indoor air become fresh. [0003] In this way, the air conditioner composed of indoor heat exchanger, outdoor heat exchanger, indoor fan, outdoor fan, electronic expansion valve, connecting pipe and control device performs a refrigeration cycle when the indoor heat exchanger functions as an evaporator. The heating cycle is performed when the heater acts as a condenser. [0004] The general diagram of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/06F24F11/00
CPCY02B30/72Y02B30/70
Inventor 梁涛强韧
Owner CHINA YANGZI GRP CHUZHOU YANGZI AIR CONDITIONERCO
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