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A method and system for controlling a solenoid valve for hot gas bypass of an air conditioner, and an air conditioner

A technology of solenoid valve and control method, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problem that the hot gas bypass control of the air conditioning control system is not very reliable, and achieve the effect of improving the effectiveness and reliability.

Active Publication Date: 2018-07-17
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an air conditioner hot gas bypass universal solenoid valve control method, system and air conditioner to solve the technical problem that the hot gas bypass control of the air conditioner control system is not very reliable

Method used

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  • A method and system for controlling a solenoid valve for hot gas bypass of an air conditioner, and an air conditioner
  • A method and system for controlling a solenoid valve for hot gas bypass of an air conditioner, and an air conditioner
  • A method and system for controlling a solenoid valve for hot gas bypass of an air conditioner, and an air conditioner

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Embodiment Construction

[0057] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0058] The control flow chart of the open control of the electromagnetic valve for the hot gas bypass of the air conditioner in the present invention can be found in figure 1 , when the condition for opening the bypass solenoid valve is satisfied, the air conditioning control unit opens the bypass solenoid valve;

[0059] Among them, the opening conditions of the bypass solenoid valve are:

[0060] The outdoor ambient temperature T4 is less than or equal to the first ambient temperature preset value A1, and the compressor frequency INV is greater than or equal to the first frequency preset value H1;

[0061] and meet any one or a combination of the following conditions:

[0062] The compressor discharge temperature T5 is less than or equal to the first preset value B1 of the discharge temperature;

[0063] The difference between the discharge tempera...

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Abstract

The invention discloses a control method of an electromagnetic valve for an air conditioner hot gas bypass. An air conditioner comprises an air conditioner control unit. The electromagnetic valve for controlling the hot gas bypass to be opened and closed is connected to the air conditioner control unit. When the condition for opening the bypass electromagnetic valve is met, the electromagnetic valve is opened. When the condition for closing the bypass electromagnetic valve is met, the electromagnetic valve is closed. The condition for opening the bypass electromagnetic valve is that the outdoor environment temperature T4 is smaller than Ai, and the compressor frequency INV is larger than H1 and any one and any combinations of the following conditions that the compressor exhaust temperature T5 is smaller than or equal to the first exhaust temperature preset value B1, the difference value of the compressor exhaust temperature T5 and the condensation side pipe temperature T3 is smaller than or equal to the first preset temperature difference value C1, the difference value of the compressor exhaust temperature T5 and the condensation pressure corresponding saturation temperature Tc is smaller than D1, and the compression ratio Pr of a compressor is larger than E1 are met. Except that the exhaust temperature T5 is adopted, the electromagnetic valve is further controlled to be opened through the exhaust superheat degree of the compressor and the compression ratio of the compressor, and the effectiveness and the reliability of the hot gas bypass electromagnetic valve are improved.

Description

technical field [0001] The invention relates to the technical field of air-conditioning control, in particular to an air-conditioning hot gas bypass electromagnetic valve control method, system and air-conditioning. Background technique [0002] At present, for the reliable operation of low-temperature heating, air-conditioning technology will add hot gas bypass control to the air-conditioning system. [0003] Hot gas bypass is a method of bypassing the high-temperature gaseous refrigerant on the high-pressure side to the low-pressure side (return gas end) of the system, and a solenoid valve is used to control the opening and closing. [0004] The role of hot gas bypass is to effectively limit the evaporation pressure, so that the compressor can operate under the return air pressure that meets the design requirements, and improve system reliability; the current air-conditioning products mainly use the exhaust temperature to control the opening of the solenoid valve, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02
CPCF25B49/022F25B2600/25F25B2700/21152F25B2700/2116
Inventor 李荣江李健锋
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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