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Control method for preventing temperature-reaching halting of variable-frequency air conditioner

A frequency conversion air conditioner and control method technology, applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve the problems of comfort reduction, frequent temperature shutdown, room temperature fluctuations, etc., to improve comfort and save energy Power consumption, avoid hot and cold effects

Active Publication Date: 2019-03-19
AUX AIR CONDITIONING LTD BY SHARE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the frequency of the fixed-frequency air conditioner cannot be adjusted, when the temperature set by the user is reached, it will continue to output the same cooling capacity, which will easily cause the machine to stop when the temperature reaches the temperature.
After the shutdown, the room temperature rises, and the air conditioner is turned on again to cool down. People feel hot and cold, and the comfort is poor.
However, due to the drive and pipeline stress vibration of the inverter air conditioner, most of the frequencies between 1 and 30 Hz cannot meet the design requirements, so the minimum allowable operating frequency is 30 Hz during design.
However, when the cooling capacity generated by the air conditioner running at 30Hz is still greater than the demand of the room, especially in a small room with a large air conditioner, there will still be problems of frequent temperature shutdowns, which will cause room temperature fluctuations, decrease comfort, and the compressor will frequently start and stop. lead to increased power consumption

Method used

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  • Control method for preventing temperature-reaching halting of variable-frequency air conditioner
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  • Control method for preventing temperature-reaching halting of variable-frequency air conditioner

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A control method for preventing an inverter air conditioner from reaching temperature and shutting down, the air conditioner includes a control device, and the control device presets the minimum frequency f of normal operation 0 , allowable operating frequency f 1 , preset temperature T S , the current room temperature is T A , Shutdown temperature difference △T 0 , downtime t 0 ’, lower limit of temperature difference △T 1 , upper limit of temperature difference △T 2 , preset time t 0 , The windshield of the external fan prevents the shutdown of the fan. In this embodiment, if the air conditioner ΔT 0 =|T S -T A |=2℃, lower limit of temperature difference △T 1 =0.5℃, upper limit of temperature difference △T 2 =1℃; when △T 0 =|T S -T A |=2℃, and last for t 0 ’ = 10min when the normal operation reaches the temperature and stops; the minimum frequency f of the normal operation 0 = 30Hz, preset f 1 = 25Hz, t 0 =2min; the allowable operating frequency f 1...

Embodiment 2

[0053] A control method for preventing an inverter air conditioner from reaching temperature and shutting down, the air conditioner includes a control device, and the control device presets the minimum frequency f of normal operation 0 , the first allowable operating frequency f 1 , the second allowable operating frequency f 2 , preset temperature T S , the current room temperature is T A , Shutdown temperature difference △T 0 , downtime t 0 ’, lower limit of temperature difference △T 1 , upper limit of temperature difference △T 2 , preset time t 0 , The windshield of the external fan prevents the shutdown of the fan. In this embodiment, if the air conditioner ΔT 0 =|T S -T A |=2℃, lower limit of temperature difference △T 1 =0.5℃, upper limit of temperature difference △T 2 =1℃; when △T 0 =|T S -T A |=2℃, and last for t 0 ’ = 10min when the normal operation reaches the temperature and stops; the minimum frequency f of the normal operation 0 = 30Hz, preset f 1 ...

Embodiment 3

[0065] A control method for preventing an inverter air conditioner from reaching temperature and shutting down, the air conditioner includes a control device, and the control device presets the minimum frequency f of normal operation 0 , the first allowable operating frequency f 1 , the second allowable operating frequency f 2 , the third allowable operating frequency f 3 , preset temperature T S , the current room temperature is T A , Shutdown temperature difference △T 0 , downtime t 0 ’, lower limit of temperature difference △T 1 , upper limit of temperature difference △T 2 , preset time t 0 , The windshield of the external fan prevents the shutdown of the fan. In this embodiment, if the air conditioner ΔT 0 =|T S -T A |=2℃, lower limit of temperature difference △T 1 =0.5℃, upper limit of temperature difference △T 2 =1℃; when △T 0 =|T S -T A |=2℃, and last for t 0 ’ = 10min when the normal operation reaches the temperature and stops; the minimum frequency f ...

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Abstract

The invention discloses a control method for preventing temperature-reaching halting of a variable-frequency air conditioner. The air conditioner comprises a control device, the triggering condition for a temperature-reaching halting preventing mode, the temperature-reaching halting preventing running frequency f, the temperature-reaching halting condition and the temperature-reaching halting preventing wind gear are preset in the control device, f meets the driving reliability, and pipeline stress vibration is qualified. The method comprises the steps that (1), whether the triggering condition for the temperature-reaching halting preventing mode is met or not is judged, if not, the current mode is kept, and if yes, the air conditioner enters in the temperature-reaching halting preventing mode; (2), the frequency is decreased to f, wherein the initial value of i is 1, i is smaller than or equal to n, n is larger than 1, and n is an element of a set N<+>; (3), whether the temperature-reaching halting condition is met or not is judged, if not, the current mode is kept, if yes, whether i is equal to n or not is judged, if not, the step (4) is conducted, and if yes, the step (5) is conducted; (4), the formula i=i+1 is conducted, and the step (2) is conducted; and (5), the rotation speed of an outer fan is decreased to the temperature-reaching halting preventing wind gear.According to the control method, the product comfortableness can be improved, the sudden cold and hot problem generated by temperature-reaching halting is avoided, and power consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of air conditioner control, and specifically proposes a control method for preventing an inverter air conditioner from reaching the temperature and shutting down. Background technique [0002] At present, in the cooling or heating process of the household air conditioner, if the temperature set by the user is reached, the air conditioner will automatically stop, that is, the compressor will stop working. However, there is still a part of the energy of the internal evaporator that needs to be released, and the internal fan needs to continue to run, which will cause wind to blow out from the network port of the internal unit. , making the user's comfort worse. If the air guide strip is directly closed after the temperature is turned off, the heat or cooling in the evaporator of the indoor unit cannot be released well, which will cause deformation of the plastic parts of the indoor unit and reduce the reliabil...

Claims

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Application Information

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IPC IPC(8): F24F11/86F24F11/871F24F11/30F24F11/61F24F11/64F25B49/02
CPCF25B49/022F25B2600/0253F25B2700/171
Inventor 颜景旭应必业
Owner AUX AIR CONDITIONING LTD BY SHARE LTD
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