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Control method for combustible refrigerant split-type air conditioner

A control method and air conditioner technology, applied in heating and ventilation control systems, applications, household heating, etc., can solve problems such as fire, and achieve the effects of high safety, low production cost, and flexible operation

Active Publication Date: 2011-08-24
MIDEA GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the air-conditioning system uses flammable refrigerants, such as R290, R32 and R161, etc., although in order to ensure the safety of the room, the charging amount of the flammable refrigerant is generally reduced as much as possible to ensure that the room after the leakage of the flammable refrigerant is at a safe concentration, but When the air conditioner filled with flammable refrigerant leaks, it will cause the flammable refrigerant to accumulate in or around the air conditioner, which may exceed the safe concentration of the flammable lower limit LFL of the flammable refrigerant, and there is a risk of fire

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  • Control method for combustible refrigerant split-type air conditioner
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  • Control method for combustible refrigerant split-type air conditioner

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Since flammable refrigerants such as propane R290, difluoromethane R32 and monofluoroethane R161 only have slightly different parameters, this embodiment only uses the control method of the air conditioner using propane R290 as an example for illustration.

[0033] see figure 1 , make a description of the air-conditioning concentration control device, the concentration detector 101 is responsible for collecting the concentration signal and inputting it into the main board 102 of the split type air conditioner for analysis and processing, and the main board 102 outputs the signal to the compressor 105 and the indoor fan 103 , the corresponding control signals of the outdoor fan 104 and the alarm 106, and the emergency button 107 is used to cancel the alarm.

[0034] When the split-type air conditioner is powered on, the concentration detector 101...

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Abstract

The invention discloses a control method for a combustible refrigerant split-type air conditioner. When the split-type air conditioner is in a power-on state, a concentration detector for detecting the combustible refrigerant is always on, and performs continuous periodical sampling detection on the combustible refrigerant of the indoor unit and outdoor unit of the split-type air conditioner; thepercentage ratio of the instantaneous concentration average value detected in a detection period to the concentration value LFL of the combustion lower limit of the combustible refrigerant is definedas the sampling value N which is updated with the sampling period; and the sampling value N is compared with the concentration parameters (a concentration first-level alarm value N1 and a concentration second-level alarm value N2) preset in a mainboard of the split-type air conditioner, specifically comprising: power-on standby and power-on start of an air conditioner, operation process of the air conditioner, shutdown of the air conditioner and alarm mode. The control method disclosed by the invention is flexible to operate, low in manufacturing cost, high in safety degree and wide in application range.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a control method for a combustible refrigerant split type air conditioner. Background technique [0002] At present, the refrigerants used in traditional household air conditioners are mainly non-flammable refrigerants such as R22 and R410A. When the air conditioning system leaks, there is no need to worry about the danger of the leaked refrigerant due to accumulation. [0003] When the air-conditioning system uses flammable refrigerants, such as R290, R32 and R161, etc., although in order to ensure the safety of the room, the charging amount of the flammable refrigerant is generally reduced as much as possible to ensure that the room after the leakage of the flammable refrigerant is at a safe concentration, but When the air conditioner filled with flammable refrigerant leaks, it will cause the flammable refrigerant to accumulate in or around the air conditioner, which may exceed the safe co...

Claims

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Application Information

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IPC IPC(8): F24F11/00
Inventor 杨瑞林伍光辉刘智勇陈海群刘振李廷勋
Owner MIDEA GRP CO LTD
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