Refrigerator

Abstract

The present invention relates to a refrigerator, comprising: a dry article chamber, a cold chamber, a first cooling and circulating system and a second cooling and circulating system in which a coolant circulates respectively, wherein an evaporating temperature of the first cooling and circulating system is lower than that of the second cooling and circulating system, the first cooling and circulating system comprises an evaporator arranged inside the cold chamber, and a refrigerating output passage is arranged between the cold chamber and the dry article chamber. By communicating the dry article chamber with the cold chamber of the first cooling and circulating system whose evaporating temperature is relatively low, the absolute humidity of the air entering the dry article chamber is much lower, realizing a lower absolute humidity in the dry article chamber.

1 . A refrigerator comprising a dry article chamber and a cold chamber, the refrigerator further comprising a first cooling and circulating system and a second cooling and circulating system in which a coolant circulates respectively, wherein an evaporating temperature of the first cooling and circulating system is lower than that of the second cooling and circulating system, the first cooling and circulating system comprises an evaporator arranged inside the cold chamber, and a refrigerating output passage is arranged between the cold chamber and the dry article chamber. 
     
     
         2 . The refrigerator of  claim 1 , wherein the refrigerator further comprising: a first capillary tube and a second capillary tube that are connected in parallel and to the evaporator, and control valves respectively arranged on the first and second capillary tubes, wherein a flow rate of the first capillary tube is smaller than that of the second capillary tube, the first cooling and circulating system comprises the evaporator and the first capillary tube, the second cooling and circulating system comprises the evaporator and the second capillary tube, and starting of the first and second capillary tubes is alternated by the control valves according to a humidity condition in the dry article chamber. 
     
     
         3 . The refrigerator of  claim 2 , wherein the refrigerator further comprising: a controller, which is electrically connected to the control valves and controls the alternative starting of the first and second capillary tubes according to the humidity condition in the dry article chamber. 
     
     
         4 . The refrigerator of  claim 2 , wherein the refrigerator further comprising: a cooling compartment connected with the refrigerating output passage, wherein the refrigerating output passage comprises a main passage connected with the cold chamber and a first sub-passage and a second sub-passage that are bifurcated from the main passage and respectively connect the dry article chamber and the cooling compartment. 
     
     
         5 . The refrigerator of  claim 4 , wherein the cooling compartment comprises one or a combination of a refrigerating compartment, a freezing compartment, and a changing-temperature compartment. 
     
     
         6 . The refrigerator of  claim 1 , wherein the refrigerator further comprising: a freezing compartment cooled by the first cooling and circulating system, and a refrigerating compartment cooled by the second cooling and circulating system, wherein the second cooling and circulating system comprises a refrigerating evaporator, the refrigerating compartment and the freezing compartment are formed by foam layer clapboards respectively, the dry article chamber is arranged inside the refrigerating compartment, and the refrigerating output passage extends from the cold chamber, passes through the foam layer clapboards and communicates with the dry article chamber, or extends from the cold chamber to a foam layer at a side portion of the freezing compartment, and communicates with the dry article chamber from a side portion of the dry article chamber. 
     
     
         7 . The refrigerator of  claim 6 , wherein the refrigerator further comprising: a return air passage communicating with the dry article chamber, wherein the return air passage passes downwards and through the foam layer clapboards and returns exchanging air in the dry article chamber to the freezing compartment or extends from a side or rear portion of the freezing compartment and directly communicates with the cold chamber; and one side of the return air passage is provided with a return air door. 
     
     
         8 . The refrigerator of  claim 1 , wherein the opening time of the refrigerating output passage is determined by the following steps:
 S 1 : acquiring an absolute humidity ρ1 in the dry article chamber and an absolute humidity ρ2 in the cold chamber; and   S 2 : if the absolute humidity ρ1 is higher than the absolute humidity ρ2, opening the refrigerating output passage;   or the opening time of the refrigerating output passage is determined by the following steps:   S 1 ′: acquiring a dew point temperature in the dry article chamber and a temperature in the cold chamber; and   S 2 ′: when the temperature in the cold chamber is lower than the dew point temperature in the dry article chamber, opening the refrigerating output passage;   or the opening time of the refrigerating output passage is determined by the following steps:   S 1 ″: acquiring a temperature W 1  in the dry article chamber; and   S 2 ″: comparing the acquired temperature W 1  in the dry article chamber with a preset temperature range D 0  in the dry article chamber of the refrigerator; if the acquired temperature W 1  in the dry article chamber is higher than the preset temperature range D 0 , opening the refrigerating output passage.   
     
     
         9 . The refrigerator of  claim 1 , wherein one side of the refrigerating output passage is provided with an air door for opening the refrigerating output passage. 
     
     
         10 . The refrigerator of  claim 1 , wherein the dry article chamber is provided with a humidity sensor for detecting a relative humidity in the dry article chamber and/or a temperature sensor for detecting a temperature therein.