Anti-frost control method and system for air conditioner outdoor unit
A technology for an air conditioner outdoor unit and a control method, which is applied to heating and ventilation control systems, heating and ventilation safety systems, mechanical equipment, etc., can solve the problem that the outdoor fan cannot be restored, the outdoor heat exchanger is frosted, and the set value cannot be lowered. and other problems to achieve the effect of avoiding the decline of heating capacity and avoiding frost
Active Publication Date: 2021-11-02
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1
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Problems solved by technology
However, when the external fan is unloaded, the temperature of the inner coil has been lower than the set value, and the external fan cannot be restored, resulting in frosting of the outdoor heat exchanger, a decrease in heating capacity, and even liquid shock to the compressor
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Embodiment Construction
[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0026] Aiming at problems such as frosting of the outdoor heat exchanger and a decrease in heating capacity when the external fan cannot be restarted when the air conditioner is in heating operation, this embodiment proposes an anti-frosting control method and system for the outdoor unit of the air conditioner. Through the control of the internal fan and the external fan, the outdoor heat exchanger is prevented from frosting and the reduction of heating capacity is avoided. Next, the anti-frost control method for the outdoor unit of the air conditioner in this embodiment will be described in detail.
[0027] The anti-frost control method of the air conditioner outdoor unit in this embodiment mainly includes the following steps, see figure 1 shown.
[0028] Step S1: The air conditioner runs in heating.
[0029] When th...
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The invention discloses an anti-frosting control method and system for an outdoor unit of an air conditioner. When the indoor coil temperature is ≥ the first set temperature value, the external fan is controlled to stop; when the stop time of the outdoor fan reaches the first set time, If the indoor coil temperature ≤ the second set temperature value, control the external fan to start; otherwise, control the internal fan to run at the first set high wind speed; when the internal fan runs at the first set high wind speed for the second set time , if the indoor coil temperature ≤ the second set temperature value, the outdoor fan is controlled to start; otherwise, the outdoor fan is controlled to run at the second set high wind speed, and the outdoor fan runs at the second set high wind speed to reach the third set Time, control the start of the external fan; thereby effectively avoiding the frosting of the outdoor heat exchanger caused by the shutdown of the external fan, avoiding the decline in heating capacity and even the phenomenon of liquid shock to the compressor.
Description
technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an anti-frosting control method and system for an outdoor unit of an air conditioner. Background technique [0002] When the air conditioner is running at a high heating load, the temperature of the inner coil will rise. When it reaches a certain set value, the external fan will unload and stop. At this time, the pressure of the entire system will drop, and the temperature of the inner coil will drop. When the temperature reaches a certain value, the outdoor fan will start to run. However, when the external fan is unloaded, the temperature of the inner coil has been lower than the set value, and the external fan cannot be restored, resulting in frosting of the outdoor heat exchanger, a decrease in heating capacity, and even liquid shock to the compressor. Contents of the invention [0003] The invention provides an anti-frosting control method for an outdo...
Claims
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IPC IPC(8): F24F11/42F24F11/64F24F140/20
Inventor 司跃元张尧马韵华魏宗科
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD