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Anti-frosting control method and anti-frosting air conditioner

A control method and anti-frost technology, applied in heating and ventilation control systems, refrigerators, refrigeration components, etc., can solve the problems of frosting on the evaporator of the indoor unit, rapid heat dissipation of the refrigerant, and affecting the cooling effect, etc. Achieve the effect of reducing the risk of liquid shock, increasing the temperature, and ensuring the cooling effect

Active Publication Date: 2022-04-15
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This scheme divides the flow at the outdoor condenser, and uses the refrigerant on the higher temperature side to heat the heat exchanger where the refrigerant on the lower temperature side is located. However, since the outdoor condenser is located outside the low temperature room, the heat of the refrigerant dissipates quickly and the heating effect is not good. Unable to solve the problem of frosting on the evaporator of the indoor unit, which affects the cooling effect

Method used

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  • Anti-frosting control method and anti-frosting air conditioner

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Embodiment 1

[0061] Air conditioning runs refrigeration mode in a low temperature environment, and the outdoor unit is exposed to a low temperature environment. The heat of the refrigerant is rapid, and the temperature is low when the refrigerant enters the evaporator, which is easy to cause the evaporator surface frost, affect the cooling effect. Conventional treatment often uses a means to reduce compressor or reduce outdoor speeds to reduce outdoor heat exchange, but in low temperature environments, compressor freezing oil viscosity, low frequency operation causes the compressor to increase the torque, reduce compressor Life, and reduce outdoor speed or stop control, once the control is slow, then cause the system pressure to exceed the standard, further damaging the compressor, reducing the reliability of the air conditioner under low temperature environment, and even causes air conditioning to cool under low temperature environment . The prior art is diverged at the outdoor condenser, and...

Embodiment 2

[0080] In order to facilitate understanding, one embodiment of the anti-frost control method will be provided to explain that in the actual application, the refrigerant flow regulating valve can be used in the step of adjusting the opening degree of the air conditioning the refrigerant flow regulating valve according to the refrigerant flow adjustment instruction. The flow valve or the two-way valve to achieve the effect of adjusting the refrigerant flow, and obtain the tube temperature of the refrigerant flow regulating the valve inlet and the outlet to determine the determination of the degree of determination of the opening degree of the refrigerant flow to achieve accurate regulation.

[0081] See figure 2 , Embodiments of the anti-frost control method shown in the present application examples include:

[0082] 201, the refrigerant flow adjustment instruction is received, and the first refrigerant temperature of the refrigerant of the refrigerant flow regulating the valve is o...

Embodiment 3

[0095] In order to facilitate understanding, one embodiment of the anti-frost control method is provided, in the practical application, the tube temperature difference is compared to the preset temperature, and the corresponding refrigerant flow adjustment command is generated according to the comparison result. The temperature of the evaporator is previously judged and whether the air conditioner is in a low temperature refrigeration state, thereby avoiding regulatory errors.

[0096] See image 3 The third embodiment of the anti-frost control method shown in the present application embodiment includes:

[0097] 301. Determine whether the air conditioner is in a low temperature refrigeration state according to the air conditioning mode and the outdoor ambient temperature;

[0098] It is determined whether the air conditioning mode is a refrigeration mode. In the case, the ambient temperature threshold can be set to be between -17 ° C to -14 ° C, preferably, can be set to -15 ° C, ...

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Abstract

The invention relates to an anti-frosting control method. The method comprises the steps that the air conditioner operation mode and the outdoor environment temperature are obtained; determining whether the air conditioner is in a low-temperature refrigeration state according to the air conditioner operation mode and the outdoor environment temperature, and if yes, obtaining a first evaporator temperature and a second evaporator temperature; determining a tube temperature difference value according to the first evaporator temperature and the second evaporator temperature; a refrigerant flow adjusting instruction is generated according to the pipe temperature difference value and the preset temperature; and the opening degree of a refrigerant flow adjusting valve of the air conditioner is adjusted according to the refrigerant flow adjusting instruction, and the refrigerant flow adjusting valve is an adjusting valve arranged between a condenser and a compressor. According to the scheme, the flow of the refrigerant entering the evaporator through the condenser can be adjusted, so that the output cooling capacity of the evaporator is adjusted, the evaporator is prevented from frosting, the refrigeration effect of the air conditioner is guaranteed, meanwhile, the situation that the compressor is damaged due to the oil viscosity is avoided, the risk of liquid impact is reduced, and the reliability of the compressor is improved.

Description

Technical field [0001] The present application relates to the field of air conditioning, in particular to anti-frosting control methods and air conditioning. Background technique [0002] Air conditioning may also need cooling operation when the air conditioner is low in winter or temperature, such as in some cold areas, heating indoors, but with the increase in the heat of the restaurant and the increase in the number of guests, the restaurant indoor temperature is easy to soar Excessive, affecting the comfort of the dining guest, requires air conditioning to switch to refrigeration mode to regulate indoor temperature; for example, some equipment rooms, due to large amounts of electronic equipment in the equipment room, the equipment room needs to maintain constant temperature throughout the year Wet indoor environment, so air conditioning in equipment rooms is usually maintained in refrigeration mode throughout the year. Air conditioning runs refrigeration mode in a low tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/65F24F11/89F25B41/20F25B49/02F24F110/12
CPCF24F11/64F24F11/65F24F11/89F25B41/20F25B49/022F24F2110/12Y02B30/70
Inventor 温加志葛小婷赖孝成何贞艳苏欣张城
Owner GREE ELECTRIC APPLIANCES INC
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