Control method of air-conditioning system and air-conditioning system

A technology of air-conditioning system and control method, which is applied in the control of air-conditioning system and the field of air-conditioning system, which can solve the problems of large noise of four-way valve, broken four-way valve, gas leakage, etc., so as to reduce instantaneous noise and ensure the reliability of commutation Effect

Active Publication Date: 2014-08-06
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] If the pressure difference between high and low pressure is too small when the four-way valve changes direction, it will lead to poor changeover of the four-way valve, resulting in the phenomenon of "cross-gas"; The reversing of the four-way valve produces a lot of noise, and the impact generated by the excessive pressure difference reversing will damage the four-way valve and affect the reliability of the valve body

Method used

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  • Control method of air-conditioning system and air-conditioning system
  • Control method of air-conditioning system and air-conditioning system
  • Control method of air-conditioning system and air-conditioning system

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Embodiment Construction

[0030] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] In one embodiment of the present invention, a control method of an air conditioning system is provided, such as figure 1 As shown, the control method includes the following steps:

[0032] S1. When a signal to switch the four-way valve is received, respectively detect the pressure values ​​P1 and P2 at the outlet side and the inlet side of the compressor.

[0033] S2. Calculate the pressure difference ΔP between the P1 and the P2, and judge whether ΔP is within the range of the predetermined pressure difference ΔP0, if ΔP is within the range of ΔP0, proceed to step S3; if ΔPΔP0, go to step S5.

[0034] S3. Control the four-way valve to perform a reversing action (power-off or power-on of the solenoid valve...

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Abstract

The invention discloses a control method of an air-conditioning system and the air-conditioning system. The control method comprises the following steps: 1, when receiving a signal of a switch four-way valve, respectively detecting pressure values (P1 and P2) of an outlet and an inlet of a compressor; 2, calculating the pressure difference delta P of (P1 and P2), judging whether delta P is within the range of preset pressure different delta P0 or not, if delta P is within the range of delta P0, controlling the four-way valve to perform steering action, if delta P is less than delta P0, controlling the compressor to increase the exhaust amount, if delta P is greater than delta P0, controlling the compressor to reduce the exhaust amount. Through the adoption of the control method disclosed by the invention, the pressure difference of the four-way valve when steering is effectively controlled, the reliability of the four-way valve in steering is ensured, and moreover relatively great instantaneous noise caused by too large pressure difference is reduced when the four-way valve steers.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system control method and the air conditioning system. Background technique [0002] Cooling and heating air conditioners usually have cooling, heating, defrosting and oil return operating modes. The switching of these operating modes is realized by the four-way valve being in different connection positions, so it is necessary to control the four-way valve for reversing action. [0003] At present, the reversing of the four-way valve is carried out according to the fixed action sequence mode of the unit itself. Basically, the pressure difference between the high and low sides of the four-way valve is not considered. The pressure difference between the high and low sides is also different, and if the four-way valve reversing is performed in a fixed pattern, it will cause the following problems: [0004] If the pressure difference between the high and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 刘合心刘群波黄春宋培刚曹双俊李奉献
Owner GREE ELECTRIC APPLIANCES INC
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