Defrosting control method of heat-pump type air conditioner

Abstract

The invention discloses a defrosting control method of a heat-pump type air conditioner. Manual intervention measures aiming at defrosting mode are arranged to prevent false operation, and the defrosting mode of the air conditioner can be intervened manually only in the heating mode and normal operation of the air conditioner. For preventing the false operation made by users in daily air conditioner operation, no special manual intervention key is arranged on an air conditioner remote controller and an air conditioner operation panel, and a manual intervention function is achieved through key combination and seldom-used operation mode combination. The defrosting control method of the heat-pump type air conditioner can avoid false defrosting motion caused by different environment, regions and other factors and can be switched to manual defrosting mode to ensure complete defrosting under the condition that incomplete defrosting is caused by uncertain factors, thereby avoiding vicious circle and improving the heating efficiency of the heat-pump type air conditioner.

Description

Technical field: [0001] The invention relates to a defrosting control method of a heat pump air conditioner. Background technique: [0002] In traditional heat pump air conditioners, the following methods are mostly used for defrosting: 1. The indoor coil temperature indirect judgment method "indoor coil temperature change rate + time method" is used to judge whether the outdoor heat exchanger is frosted, that is, by detecting the indoor coil temperature. The rate of change of coil temperature Th, combined with time control (that is, to determine a minimum operating time to prevent frequent defrosting); 2. The coil temperature sensor on the outdoor heat exchanger to judge the frosting of the outdoor heat exchanger. However, the two defrosting methods have their own applicable regions, climates, and environments, and have certain shortcomings under other environmental conditions, making it difficult to adapt to all use environments. There will be false defrosting and defrost...

AI Technical Summary

Problems solved by technology

At this time, if the outdoor fan motor drives the fan blades to rotate and hit the ice, it is easy to cause the fan blades to break or the motor to stall. Or when the protection measures fail, it is easy to cause a short circuit between the lines and a burnout of the motor, etc.)

Due to the ice or frost on the surface of the copper tube of the heat exchanger of the outdoor unit of the air conditioner, the heat cannot be fully converted and absorbed, and the temperature of the tube will continue to drop, so the heating performance of the whole machine will be greatly weakened, and the compressor load will gradually increase. , and affect the service life

And the temperature blown out by the indoor unit gradually decreases, which will also bring discomfort to the user.

[0003] Inadvertent defrosting will result in the loss of heating capacity and the decline of heating effect, while incomplete defrosting will bring greater hidden dangers. In the case of incomplete defrosting, the only way to do this is to pour boiling water on the outdoor heat exchanger. , unplug the four-way valve connection, forced refrigeration and other methods to solve the problem

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