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Air-conditioner refrigerant flow control method

A technology of refrigerant flow and control method, applied in heating and ventilation control systems, heating methods, space heating and ventilation, etc., can solve the problems of loss of precise control, infinite loop, sensor installation errors, etc. Control precise and reliable, cost-saving effects

Inactive Publication Date: 2014-04-09
TCL AIR CONDITIONER ZHONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The system is in a high-load state at the initial stage of starting up, and the superheat of the air-conditioning system has not yet formed in a short period of time. At this time, the detected superheat value cannot represent the real overheat state. Infinite loop
[0004] (2) At present, the negative temperature coefficient thermistor sensor is commonly used in air conditioners. It has the advantages of small size, high sensitivity, fast response speed, and high resolution, but its low linearity and poor stability make the temperature test have certain errors, and the superheat The control range is narrow, so the error of the sensor has a great influence on the superheat control, and the operating state of the system deviates greatly from the optimal state
[0005] (3) The superheat control is highly dependent on the detection accuracy of the sensor. The difference in the installation position of the sensor, or the error in the installation of the sensor due to later maintenance and the refrigerant leakage of the air conditioner will cause the system to lose precise control

Method used

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Embodiment Construction

[0026] The method of the present invention is based on the relationship between the compressor exhaust temperature Tp of the multi-connected central air conditioner, the outlet temperature T3 of the outdoor unit heat exchanger, and the temperature T2 of the indoor unit heat exchanger, and with certain rules, the electronic expansion valve of the control system is opened. In order to implement a control method for adjusting the refrigerant flow rate of the system.

[0027] Such as figure 1 As shown, taking an inverter air conditioner as an example, the refrigeration system of the inverter air conditioner of the present invention includes a compressor 10 , a four-way valve 8 , an outdoor unit heat exchanger 1 , an electronic expansion valve 3 , and an indoor unit heat exchanger 6 . The electronic expansion valve 3 is a throttling part of the refrigeration system. A first two-way stop valve 4 is provided between the electronic expansion valve 3 and the indoor unit heat exchanger ...

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Abstract

The invention discloses an air-conditioner refrigerant flow control method. The air-conditioner uses an electronic expansion valve as a throttling component. The air-conditioner refrigerant flow control method includes the steps of S1, determining a condensate depression delta T according to running modes of the air-conditioner, S2, determining a target condensate depression delta P according to running modes of the air-conditioner and environmental temperature, and S3, obtaining a condensate depression differential value SH according to the difference between the condensate depression delta T and the target condensate depression delta P, and regulating the openness of the electronic expansion valve according to the condensate depression differential value SH. The air-conditioner refrigerant flow control method has the advantages of accurate flow controlling and low cost.

Description

technical field [0001] The invention relates to the technical field of air conditioning, and more specifically, to a method for controlling the flow of refrigerant in an air conditioner. Background technique [0002] With the development of air-conditioning technology, DC inverter air conditioners are becoming more and more mature in technology, and have been recognized by users in the market, and have gradually entered thousands of households. According to relevant information on the air-conditioning refrigeration market, in recent years, the market share of my country's inverter air conditioners has risen rapidly, and now it has exceeded 50%. Inverter air conditioners have become the development trend of air conditioners in the future. The advantage of the inverter air conditioner is that it can adjust the output of the inverter compressor according to the system load, so it is more efficient and energy-saving. However, the output change of the compressor requires that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 陈卫东梁永醒李松波
Owner TCL AIR CONDITIONER ZHONGSHAN CO LTD
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