Method and device for controlling pressure difference between high and low pressure sides of multi-connected air conditioner compressor and air conditioner
A multi-connected air conditioner, high and low pressure side technology, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve the problems of high cost, affecting the comfort of air conditioner use, large high and low pressure difference, etc., to achieve cost low effect
Active Publication Date: 2021-03-02
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Problems solved by technology
The cost of the first method is relatively high. Although the second method cancels the solenoid valve, the cost is lower, but the external function needs to reach 0, and the pressure difference between the high and low pressure sides of the whole system is large, and the electronic expansion valve opens to the initial opening. There will be a "swish" noise due to the airflow washing, which will affect the comfort of the air conditioner
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[0026] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.
[0027] figure 1 It is a flow chart of a method for controlling the pressure difference between the high and low pressure sides of a multi-connected air conditioner compressor provided by an embodiment of the present invention. Such as figure 1 As shown, the embodiment of the present invention provides a method for controlling the pressure difference between the high and low pressure sides of a multi-connected air conditioner compressor. The multi-connected air conditioner includes: at least one external unit and multiple Indoor machines, the method includes: when the multiple in...
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Embodiments of the present invention provide a method and device for controlling the pressure difference between high and low pressure sides of a multi-connected air conditioner compressor, and an air conditioner, which belong to the field of air conditioners. The multi-connected air conditioner includes: at least one outdoor unit and multiple indoor units connected to the at least one external unit, and the method includes: when the multiple indoor units are shut down, determining the Shutdown sequence: when the external unit is shut down, according to the shutdown sequence of the multiple indoor units, the action of the electronic expansion valves of the multiple internal units is controlled to control the pressure difference between the high and low pressure sides of the compressor. The cost of the control method, device and air conditioner for the pressure difference between the high and low pressure sides of the multi-connected air conditioner compressor is relatively low, and unnecessary noise is not generated.
Description
technical field [0001] The invention relates to the field of air conditioners, in particular to a method and device for controlling the pressure difference between high and low pressure sides of multi-connected air conditioner compressors and an air conditioner. Background technique [0002] A multi-connected air conditioning system is generally one or more outdoor units with multiple outdoor units. Usually, each multi-line internal unit is equipped with an electronic expansion valve, so as to realize the independent opening, closing and flow adjustment of the internal unit, and realize the best "distribution on demand" of the entire multi-line system. [0003] When the indoor unit reaches the set temperature or is turned off manually, the outdoor unit needs to be stopped at this time, that is, the function of the external unit must be 0. Since the compressor can only be safely started when the pressure difference is less than a certain value (different compressors have dif...
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IPC IPC(8): F24F11/32F24F11/64F24F11/84F24F11/86F24F11/88
Inventor 吴彦东张郊郭军庄子宝龙旦风李安民杨斌
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD