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Defrosting control method and device, air conditioner and computer readable storage medium

A control method and control device technology, applied in space heating and ventilation, heating and ventilation control systems, heating methods, etc., can solve problems affecting user experience, power waste, etc., to reduce operations, improve accuracy, and reduce waste Effect

Pending Publication Date: 2018-07-24
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the defrosting control process of the related art, it is usually determined whether defrosting is required by judging whether the drop in evaporator tube temperature or condenser tube temperature is greater than a certain threshold, and the range of temperature change used to judge whether defrosting is required They all take the cumulative change range within the cumulative time after the stable operation state, but in the case of relatively dry outdoor air with low moisture content, when the outdoor temperature gradually decreases, the temperature of the evaporator or the tube temperature of the condenser will also increase accordingly. When the outdoor temperature drops, the heat pump air conditioner will automatically enter the defrosting mode when the temperature drop meets the preset temperature conditions for defrosting. Frost-free defrosting phenomenon, because the defrosting mode needs to stop the heating process of the indoor unit, so it not only affects the user experience, but also leads to a waste of electric energy

Method used

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  • Defrosting control method and device, air conditioner and computer readable storage medium
  • Defrosting control method and device, air conditioner and computer readable storage medium
  • Defrosting control method and device, air conditioner and computer readable storage medium

Examples

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Embodiment 1

[0150] Figure 4 A schematic flowchart of a defrosting control method according to another embodiment of the present invention is shown.

[0151] Such as Figure 4 As shown, the defrosting control method according to another embodiment of the present invention includes:

[0152] S402, judging whether the actual operation mode of the air conditioner is heating mode, if yes, execute S404, if not, execute S402 again;

[0153] S404, judging whether the current operating state has been maintained for more than 15 minutes, including the indoor and outdoor unit fan speed and compressor operating state, if yes, execute S406, if not, execute S402 again;

[0154] S406, judging whether the compressor operating current descending slope △Ia / △t, that is, the rate of change of the compressor operating current, is less than Ka, Ka refers to the second preset current rate of change, which is a negative number, if yes, execute S408, if not , re-execute S402;

[0155] S408, performing a defr...

Embodiment 2

[0159] Figure 5 A schematic flowchart of a defrosting control method according to yet another embodiment of the present invention is shown.

[0160] Such as Figure 5 As shown, the defrosting control method according to another embodiment of the present invention includes:

[0161] S502, judging whether the actual operation mode of the air conditioner is heating mode, if yes, execute S504, if not, execute S502 again;

[0162] S504, judging whether the current operating state has been maintained for more than 15 minutes, including the indoor and outdoor unit fan speed and compressor operating state, if yes, execute S506, if not, execute S502 again;

[0163] S506, judging whether the descending slope of the bus current △Ib / △t, that is, the rate of change of the bus current is less than Kb, Kb refers to the first preset current rate of change, which is a negative number, if yes, execute S508, if not, execute again S502;

[0164] S508, performing a defrosting operation;

[016...

Embodiment 3

[0168] Figure 6 A schematic flowchart of a defrosting control method according to yet another embodiment of the present invention is shown.

[0169] Such as Figure 6 As shown, the defrosting control method according to yet another embodiment of the present invention includes:

[0170] S602, judge whether the actual operation mode of the air conditioner is heating mode, if yes, execute S604, if not, execute S602 again;

[0171] S604, judging whether the current operating state has been maintained for more than 15 minutes, including the indoor and outdoor unit fan speed and compressor operating state, if yes, execute S606, if not, execute S602 again;

[0172] S606. Determine whether the falling slope of the operating current of the outdoor unit △Ic / △t, that is, the rate of change of the operating current of the outdoor unit, is less than Kc. Kc refers to the third preset current rate of change and is a negative number. If yes, execute S608; if not , re-execute S602;

[017...

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Abstract

The invention provides a defrosting control method and device, an air conditioner and a computer readable storage medium. The defrosting control method comprises the step that according to the magnitude relation between the bus electric current change rate and the first preset electric current change rate, and / or the magnitude relation between the compressor operating electric current change rateand the second preset electric current change rate, and / or the magnitude relation between the outdoor unit operating electric current change rate and the third preset electric current change rate, whether defrosting operation is conducted or not is determined. Through the technical scheme of the invention, the influence of the outdoor environment temperature on the defrosting control process is reduced, the accuracy and reliability of the defrosting control scheme are improved, the using experience of the user when the air conditioner operates in the heating mode is improved, operation that defrosting is conducted when frost does not exist is reduced as far as possible, and wasted electric energy is decreased.

Description

technical field [0001] The present invention relates to the technical field of defrosting, in particular to a defrosting control method, a defrosting control device, an air conditioner and a computer-readable storage medium. Background technique [0002] When the outdoor environment is low in winter, when the heat pump air conditioner is operating in the heating mode, the condenser of the outdoor unit will gradually frost, and the frost layer will become thicker and thicker, which will affect the heat transfer of the condenser. As the frost layer becomes thicker, the heat exchange capacity of the condenser will become worse and worse, gradually losing the ability to absorb heat from the outdoor environment, resulting in worse and worse heating effect of the whole machine. When the frost layer thickens to a certain extent, defrosting treatment is required, and after the frost layer is melted away, it will enter the heating state again. [0003] In the defrosting control proc...

Claims

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Application Information

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IPC IPC(8): F24F11/42F24F11/61F24F11/64F24F11/88F24F140/20
Inventor 魏洪涛
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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