Method and device for defrosting air conditioner

Abstract

A method and device for defrosting an air conditioner. The method comprises the following steps: detecting a refrigerant pressure of a heat exchange; obtaining, according to the detected refrigerant pressure of the heat exchange, a corresponding saturation temperature; obtaining an ambient dew point temperature; and when the corresponding saturation temperature is less than 0° C. and less than the ambient dew point temperature, controlling the air conditioner to enter a defrost mode. The method can ensure timely defrosting when frost is formed, prevent defrosting when no frost is formed, extending a service life of an air conditioner.

1 - 23 . (canceled) 
     
     
         24 . A method for controlling a defrosting of an air conditioner performed at a computing device having one or more processors and memory storing a plurality of programs to be executed by the one or more processors, the method comprising:
 obtaining, a current outdoor relative humidity, a current outdoor temperature and a current temperature of an outdoor heat exchanger;   detecting a continuous operating time period of the air conditioner under the current outdoor relative humidity;   determining, according to the current outdoor relative humidity, the current outdoor temperature, the current temperature of the outdoor heat exchanger and the continuous operating time period, whether the outdoor heat exchanger meets a predetermined defrosting condition; and   defrosting the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition.   
     
     
         25 . The method of  claim 24 , wherein, the operation of defrosting the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition, comprises:
 defrosting the outdoor heat exchanger when the continuous operating time period reaches the current frosting period.   
     
     
         26 . The method of  claim 24 , further comprising:
 before detecting the continuous operating time period of the air conditioner under the current outdoor relative humidity:
 determining, whether the outdoor relative humidity in a second time period is equal to the outdoor relative humidity in a first time period preceding the second time period; 
 continuously detecting the continuous operating time period of the air conditioner under the current outdoor relative humidity when the outdoor relative humidity in the second time period is equal to the outdoor relative humidity in the first time period; and 
 detecting a continuous operating time period of the air conditioner under the outdoor relative humidity in the second time period when the outdoor relative humidity in the second time period is not equal to the outdoor relative humidity in the first time period. 
   
     
     
         27 . The method of  claim 24 , wherein, the operation of determining, according to the current outdoor relative humidity, the current outdoor temperature, the current temperature of the outdoor heat exchanger and the continuous operating time period, whether the outdoor heat exchanger meets the predetermined defrosting condition, comprises:
 determining, according to the current outdoor relative humidity, the current outdoor temperature, and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets a predetermined frosting condition;   determining, according to the current outdoor relative humidity and the current temperature of the outdoor heat exchanger, a current frosting period of the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition; and   determining, according to the continuous operating time period and the current frosting period, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         28 . The method of  claim 27 , further comprising:
 before determining, according to the continuous operating time period and the current frosting period, whether the outdoor heat exchanger meets the predetermined defrosting condition:
 obtaining, a frosting period corresponding to each outdoor relative humidity and a continuous operating time period corresponding to the outdoor relative humidity, of a current data obtaining period and before the current data obtaining period; 
   wherein the operation of determining, according to the continuous operating time period and the current frosting period, whether the outdoor heat exchanger meets the predetermined defrosting condition, comprises:   determining, according to the continuous operating time period corresponding to each outdoor relative humidity and the frosting period corresponding to the outdoor relative humidity, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         29 . The method of  claim 28 , wherein, the operation of determining, according to the continuous operating time period corresponding to each outdoor relative humidity and the frosting period corresponding to each outdoor relative humidity, whether the outdoor heat exchanger meets the predetermined defrosting condition, comprises:
 obtaining, a ratio of the continuous operating time period and the frosting period, corresponding to the same outdoor relative humidity;   obtaining, a sum of the ratio corresponding to each outdoor relative humidity; and   determining, according to whether the sum reaches 1, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         30 . The method of  claim 24 , wherein, the operation of determining, according to the current outdoor relative humidity, the current outdoor temperature, and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets the predetermined frosting condition, comprises:
 determining, according to the current outdoor relative humidity and the outdoor heat exchanger, a current frosting critical temperature of the outdoor heat exchanger; and   determining, according to the current frosting critical temperature and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         31 . The method of  claim 24 , further comprising:
 before obtaining, the current outdoor relative humidity, the current outdoor temperature and the current temperature of the outdoor heat exchanger:
 obtaining a current operating state of the air conditioner; 
 determining whether the current operating state of the air conditioner is a heating state; and 
 obtaining the current outdoor relative humidity, the current outdoor temperature and the current temperature of the outdoor heat exchanger in response to the current operating state of the air conditioner being the heating state. 
   
     
     
         32 . An air conditioner, comprising:
 an outdoor heat exchanger;   a plurality of humidity detecting elements configured to detect outdoor humidity or outdoor relative humidity;   a plurality of temperature detecting elements configured to detect outdoor temperature and temperature of an outdoor heat exchanger; and   a computing device having one or more processors and memory storing a plurality of programs to be executed by the one or more processors, wherein the computing device is communicatively connected to the plurality of humidity detecting elements and the plurality of temperature detecting elements the program for controlling a defrosting of the air conditioner by performing operations including:
 obtaining, a current outdoor relative humidity, a current outdoor temperature and a current temperature of the outdoor heat exchanger; 
 detecting a continuous operating time period of the air conditioner under the current outdoor relative humidity; 
 determining, according to the current outdoor relative humidity, the current outdoor temperature, the current temperature of the outdoor heat exchanger and the continuous operating time period, whether the outdoor heat exchanger meets a predetermined defrosting condition; and 
 defrosting the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition. 
   
     
     
         33 . The air conditioner of  claim 32 , wherein, the operation of defrosting the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition, comprises:
 defrosting the outdoor heat exchanger when the continuous operating time period reaches the current frosting period.   
     
     
         34 . The air conditioner of  claim 32 , wherein the operations further comprise:
 before detecting the continuous operating time period of the air conditioner under the current outdoor relative humidity:
 determining, whether the outdoor relative humidity in a second time period is equal to the outdoor relative humidity in a first time period preceding the second time period; 
 continuously detecting the continuous operating time period of the air conditioner under the current outdoor relative humidity when the outdoor relative humidity in the second time period is equal to the outdoor relative humidity in the first time period; and 
 detecting a continuous operating time period of the air conditioner under the outdoor relative humidity in the second time period when the outdoor relative humidity in the second time period is not equal to the outdoor relative humidity in the first time period. 
   
     
     
         35 . The air conditioner of  claim 32 , wherein, the operation of determining, according to the current outdoor relative humidity, the current outdoor temperature, the current temperature of the outdoor heat exchanger and the continuous operating time period, whether the outdoor heat exchanger meets the predetermined defrosting condition, comprises:
 determining, according to the current outdoor relative humidity, the current outdoor temperature, and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets a predetermined frosting condition;   determining, according to the current outdoor relative humidity and the current temperature of the outdoor heat exchanger, a current frosting period of the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition; and   determining, according to the continuous operating time period and the current frosting period, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         36 . The air conditioner of  claim 32 , wherein, the operation of determining, according to the current outdoor relative humidity, the current outdoor temperature, and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets the predetermined frosting condition, comprises:
 determining, according to the current outdoor relative humidity and the outdoor heat exchanger, a current frosting critical temperature of the outdoor heat exchanger; and   determining, according to the current frosting critical temperature and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         37 . The air conditioner of  claim 32 , wherein the operations further comprise:
 before obtaining, the current outdoor relative humidity, the current outdoor temperature and the current temperature of the outdoor heat exchanger:
 obtaining a current operating state of the air conditioner; 
 determining whether the current operating state of the air conditioner is a heating state; and 
 obtaining the current outdoor relative humidity, the current outdoor temperature and the current temperature of the outdoor heat exchanger in response to the current operating state of the air conditioner being the heating state. 
   
     
     
         38 . A non-transitory computer-readable storage medium storing a plurality of programs for controlling a defrosting of an air conditioner, wherein the plurality of programs, when executed by a computing device, cause the computing device to perform operations including:
 obtaining, a current outdoor relative humidity, a current outdoor temperature and a current temperature of an outdoor heat exchanger of the air conditioner;   detecting a continuous operating time period of the air conditioner under the current outdoor relative humidity;   determining, according to the current outdoor relative humidity, the current outdoor temperature, the current temperature of the outdoor heat exchanger and the continuous operating time period, whether the outdoor heat exchanger meets a predetermined defrosting condition; and   defrosting the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition.   
     
     
         39 . The non-transitory computer-readable storage medium of  claim 38 , wherein, the operation of defrosting the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition, comprises:
 defrosting the outdoor heat exchanger when the continuous operating time period reaches the current frosting period.   
     
     
         40 . The non-transitory computer-readable storage medium of  claim 38 , wherein the operations further comprise:
 before detecting the continuous operating time period of the air conditioner under the current outdoor relative humidity:
 determining, whether the outdoor relative humidity in a second time period is equal to the outdoor relative humidity in a first time period preceding the second time period; 
 continuously detecting the continuous operating time period of the air conditioner under the current outdoor relative humidity when the outdoor relative humidity in the second time period is equal to the outdoor relative humidity in the first time period; and 
 detecting a continuous operating time period of the air conditioner under the outdoor relative humidity in the second time period when the outdoor relative humidity in the second time period is not equal to the outdoor relative humidity in the first time period. 
   
     
     
         41 . The non-transitory computer-readable storage medium of  claim 38 , wherein, the operation of determining, according to the current outdoor relative humidity, the current outdoor temperature, the current temperature of the outdoor heat exchanger and the continuous operating time period, whether the outdoor heat exchanger meets the predetermined defrosting condition, comprises:
 determining, according to the current outdoor relative humidity, the current outdoor temperature, and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets a predetermined frosting condition;   determining, according to the current outdoor relative humidity and the current temperature of the outdoor heat exchanger, a current frosting period of the outdoor heat exchanger when the outdoor heat exchanger meets the predetermined frosting condition; and   determining, according to the continuous operating time period and the current frosting period, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         42 . The non-transitory computer-readable storage medium of  claim 38 , wherein, the operation of determining, according to the current outdoor relative humidity, the current outdoor temperature, and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets the predetermined frosting condition, comprises:
 determining, according to the current outdoor relative humidity and the outdoor heat exchanger, a current frosting critical temperature of the outdoor heat exchanger; and   determining, according to the current frosting critical temperature and the current temperature of the outdoor heat exchanger, whether the outdoor heat exchanger meets the predetermined defrosting condition.   
     
     
         43 . The non-transitory computer-readable storage medium of  claim 38 , wherein the operations further comprise:
 before obtaining, the current outdoor relative humidity, the current outdoor temperature and the current temperature of the outdoor heat exchanger:
 obtaining a current operating state of the air conditioner; 
 determining whether the current operating state of the air conditioner is a heating state; and 
 obtaining the current outdoor relative humidity, the current outdoor temperature and the current temperature of the outdoor heat exchanger in response to the current operating state of the air conditioner being the heating state.