Qingdao Haier Air Conditioner General Corp., Ltd.

Mingjie Zhang

Fei Wang

Yu Fu

Beibei Xu

Juke Liu

Wenming Xu

Rongbang Luo

Hongjin Wu

Junjun Yuan

Shuang Ding

Youning Wang

Bo Li

Baohua Gao

Zhiqiang Ren

Zeyuan Bai

Provided is a control method on electronic expansion valve in air conditioner comprises: obtaining a real-time running frequency of compressor, a real-time exhaust temperature and a real-time outdoor environment temperature as the compressor running; comparing the real-time running frequency of compressor with a first set frequency; if the real-time running frequency is greater than or equal to the first set frequency, obtaining an integral coefficient of the PID algorithm according to a first set rule; if the real-time running frequency is less than the first set frequency, obtaining an integral coefficient of the PID algorithm according to the comparison of the real-time outdoor environment temperature and the first set outdoor environment temperature and a second set rule, or according to the comparison of the real-time outdoor environment temperature and the first set outdoor environment temperature and a third set rule, wherein the selection is based on whether the air conditioner is working in cooling mode or in heating mode; performing a PID control on the electronic expansion valve by an error of the difference between real-time exhaust temperature and a set target exhaust temperature. The method realizes an accurate and stable control on electronic expansion valve opening amount.

Method of adjusting electronic expansion valve of outdoor unit of air-conditioner

A cooling device for air conditioner circuit board includes a compressor, an outdoor heat exchanger, a gas-liquid separator, and an indoor heat exchanger which are connected in sequence. A gas outlet end of the gas-liquid separator is communicatively coupled with a gas suction port of the compressor through a cooling pipeline, and a cooling equipment for cooling the air conditioner circuit board is provided on the cooling pipeline.

Cooling device for air conditioner circuit board

Provided is a control method for an electronic expansion valve in air conditioner comprises: obtaining a real-time running frequency of compressor, a real-time exhaust temperature and a real-time outdoor environment temperature as the compressor running; retrieving a target exhaust temperature according to the real-time running frequency in a preset relation in which each available target exhaust temperature is paired with a single real-time running frequency, wherein the target exhaust temperature retrieved being defined as a first target exhaust temperature; defining a sum of the first target exhaust temperature and a set compensation temperature as a second target exhaust temperature, wherein the set compensation temperature is determined by the real-time outdoor environment temperature; and performing a PID control on opening amount of the electronic expansion valve based on a deviation that is a difference between the real-time exhaust temperature and the second target exhaust temperature. The method achieves an accurate and stable control on opening amount of electronic expansion valve in air conditioner.

Method of controlling electronic expansion valve of air-conditioner

A self-cleaning method for an air-conditioner heat exchanger is provided and includes: controlling an air-conditioner to enter a self-cleaning mode; detecting an ambient temperature of a to-be-cleaned heat exchanger, and determining, according to the detected ambient temperature, a target evaporating temperature of the to-be-cleaned heat exchanger; adjusting, according to the target evaporating temperature and an actual evaporating temperature of the to-be-cleaned heat exchanger, an evaporating temperature of the to-be-cleaned heat exchanger, and controlling the to-be-cleaned heat exchanger to frost; and after a surface of the to-be-cleaned heat exchanger is covered with a frost layer or an ice layer, controlling the air conditioner to enter a defrosting mode of the to-be-cleaned heat exchanger.

Air conditioner and method for self-cleaning air conditioner heat exchanger

Provided is a control method on electronic expansion valve in air conditioner, which comprises: obtaining a real-time running frequency of compressor, a real-time exhaust temperature and a real-time outdoor environment temperature as the compressor running; if the air conditioner working in cooling mode, using a first set rule or a second set rule to obtain an integral coefficient in which the selection is based on the comparison of the real-time outdoor environment temperature and a first set outdoor environment temperature; if the air conditioner working in heating mode, using a first set rule or a third set rule to obtain an integral coefficient in which the selection is based on the comparison of the real-time outdoor environment temperature and a second set outdoor environment temperature; performing a PID control on the electronic expansion valve by using an error of the difference between real-time exhaust temperature and a set target exhaust temperature. The method realizes an accurate and stable control on opening amount of electronic expansion valve in air conditioner.

Method of adjusting electronic expansion valve of air conditioner

A method for cleaning an air conditioner indoor unit and outdoor unit includes controlling a heat exchanger to enter a self-cleaning mode, adjusting an operating frequency of an air conditioner, an opening of a throttling device, and a corresponding fan speed of the heat exchanger, and maintaining an evaporating temperature of the heat exchanger within a present range to enable a frost process on a surface of the heat exchanger. When a differential pressure of the air conditioner meets a preset condition, a four-way valve changes a direction, switching defrosting to indoor and outdoor heat exchangers. When the differential pressure does not meet the preset condition, the air conditioner is adjusted to meet the preset condition and the four-way valve direction is changed to perform a defrosting switching to the indoor and outdoor heat exchangers.

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Shandong, China

Mingjie Zhang