Inverter air conditioner expansion valve initial opening control method and inverter air conditioner

A technology of variable frequency air conditioner and control method, which is applied to the initial opening degree control of the expansion valve of the variable frequency air conditioner and the field of variable frequency air conditioners, can solve the problems affecting the cooling and heating speed, the flow rate is too small, and the compressor over-temperature protection, etc., so as to improve the speed and operation. Efficiency and reliability improvement

Active Publication Date: 2021-06-29
四川长虹空调有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The current industry solution is to timely adjust the opening of the electronic expansion valve according to the changes in temperature parameters and frequency during the cooling and heating operation of the inverter air conditioner, so as to adapt to this change and ensure the efficient and reliable operation of the system. For the sake of simplicity when starting up, the industry generally adopts fixed expansion valve opening or segmented fixed opening according to the internal and external ambient temperature. Although such a control logic is simple, in actual control due to the mismatch between the initial opening and the initial operating environment, It will affect the system's inability to quickly adjust to the optimal flow during the initial cooling and heating start-up stages, affecting the cooling and heating speed, and may also cause compressor over-temperature protection or liquid shock in extreme environments due to too small or too large flow other reliability risk

Method used

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  • Inverter air conditioner expansion valve initial opening control method and inverter air conditioner
  • Inverter air conditioner expansion valve initial opening control method and inverter air conditioner

Examples

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Effect test

Embodiment 1

[0069] The initial opening control of the expansion valve of the inverter air conditioner, such as figure 1 As shown, the following steps may be included:

[0070] S1: After the air conditioner is turned on and running, first determine the operating mode of the air conditioner, if it is in the cooling mode, perform step S2, and if it is in the heating mode, perform step S3;

[0071] S2: In the cooling mode, the control unit first receives the frequency fed back by each sensor, the internal and external ambient temperature, and the internal and external motor speed, and then executes S21;

[0072] S21: The control unit calculates on the basis of the refrigeration reference opening according to the feedback parameters, and dynamically adapts the cooling initial opening according to the algorithm And adjust the expansion valve accordingly;

[0073] S3: In the heating mode, the control unit first receives the frequency fed back by each sensor, the internal and external ambient ...

Embodiment 2

[0079] The initial opening control of the expansion valve of the inverter air conditioner, such as figure 1 As shown, the following steps may be included:

[0080] S1: After the air conditioner is turned on and running, first determine the operating mode of the air conditioner, if it is in the cooling mode, perform step S2, and if it is in the heating mode, perform step S3;

[0081] S2: In the cooling mode, the control unit first receives the frequency fed back by each sensor, the internal and external ambient temperature, and the internal and external motor speed, and then executes S21;

[0082]S21: The control unit calculates on the basis of the refrigeration reference opening according to the feedback parameters, and dynamically adapts the cooling initial opening according to the algorithm And adjust the expansion valve accordingly;

[0083] S3: In the heating mode, the control unit first receives the frequency fed back by each sensor, the internal and external ambient t...

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Abstract

The invention discloses a variable frequency air conditioner expansion valve initial opening control method and a variable frequency air conditioner. Calculate the initial opening degree, and adjust the expansion valve according to the initial opening degree; the initial opening degree is determined by the pre-corrected opening degree, the corrected opening degree of the indoor motor, and the corrected opening degree of the outdoor motor. The invention can adapt the initial opening to various start-up environments under variable working conditions, can quickly adjust to the optimum flow rate during the start-up stage, and has high reliability.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a method for controlling the initial opening of an expansion valve of an inverter air conditioner and an inverter air conditioner. Background technique [0002] At present, during the operation of the inverter air conditioner, due to changes in the internal and external environment temperature, frequency changes, and load changes, it is necessary to adjust the refrigerant flow rate at any time to adapt to this variable operating condition. The increase in the opening of the electronic expansion valve increases the flow rate and decreases the opening. Refrigerant adaptation is performed by reducing the flow rate, so as to give full play to the heat exchange efficiency of the system and improve the cooling and heating effect on the basis of reliable system operation. [0003] The current industry solution is to timely adjust the opening of the electronic expans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/70F24F11/64F24F110/10F24F110/12
CPCF24F11/64F24F11/70F24F2110/10F24F2110/12
Inventor 杨涛王金龙岳冯欢
Owner 四川长虹空调有限公司
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