Multi-Temperature Control Refrigerator Comprising an Ice Machine

Abstract

The present invention relates to a multi-temperature control refrigerator, in which an ice machine is installed and the cooling mode of the refrigerator is a mixed air-cooling and direct cooling mode. Particularly, the present invention relates to a refrigerator having ice-making function, in which the refrigeration cycle is a dual cycle and two different evaporators are included. Due to that the ice making room of the of the refrigerator of the present invention adopts a mixed air-cooling and direct cooling mode, and that impulse solenoid valves and dual temperature control device are introduced to the dual cycle system, the energy is optimally distributed and utilized, the fluctuation of temperature is small and the ice making efficiency of the ice making room and the quality of the ice cubes are much improved. And the whole refrigerator makes less noise, consumes fewer refrigerants and makes ice of good quality rapidly.

1 . A multi-temperature control refrigerator, in which an ice machine is installed and the cooling mode of the refrigerator is a mixed air-cooling and direct cooling mode, comprises a refrigerator compartment and a freezer compartment which further comprises an ice making room, wherein said refrigerator compartment and freezer compartment adopt direct cooling mode for refrigeration and said ice making room adopts a mixed air-cooling and direct cooling mode for refrigeration. 
   
   
       2 . A refrigerator as claimed in  claim 1 , wherein said freezer compartment adopts fin type evaporator; the fin pitch of said fin type evaporator is over 6 mm, preferably 6-8 mm; said fin is preferably spiral fins. 
   
   
       3 . A refrigerator as claimed in  claim 1 , wherein said ice making room is mounted with a door which encloses the space of the ice making room; said ice making room is set at the upper part of the freezer compartment. 
   
   
       4 . A refrigerator as claimed in  claim 1 , wherein in the space where the evaporator of said freezer compartment presents, a air inlet ( 6 ) and air outlet ( 7 ) connecting the ice making room are installed; a door is preferably installed at the air outlet ( 7 ) and/or the air inlet ( 6 ) of the ice making room. 
   
   
       5 . A refrigerator as claimed in  claim 1 , wherein said refrigerator compartment adopts plate type evaporator which sticks to the inner liner of the refrigerator compartment; said freezer compartment adopts a mixed air-cooling and direct cooling mode and one side of the evaporator also sticks to the inner liner of the freezer compartment while behind the other side there is a gap; a heating tube is preferably set on the evaporator of the freezer compartment and the form of the heating tube is determined according to the form of the evaporator. 
   
   
       6 . A refrigerator as claimed in  claim 1 , wherein the heater for defrosting the evaporator in said freezer compartment is in contact with the water inlet of the ice machine. 
   
   
       7 . A refrigerator as claimed in  claim 1 , wherein said freezer compartment and refrigerator compartment is each installed with temperature sensing units and an action sensor is set inside the ice making room. 
   
   
       8 . A refrigerator as claimed in  claim 1 , wherein said refrigerator adopts dual cycle refrigeration system and an evaporator that is large in area is connected to the bypass circuit as an additional evaporator of the refrigerator compartment. 
   
   
       9 . A refrigerator as claimed in  claim 1 , wherein said refrigerator comprises an additional evaporator for the refrigerator compartment; the outlet of the compressor is connected to the inlet of the condenser; the outlet of the condenser is connected to the inlet of the desiccation filter; the outlet of the desiccation filter is connected to the three-way solenoid valve; one outlet of the three-way solenoid valve is connected to the inlet of the main capillary tube, the other outlet is connected to the inlet of the bypass capillary tube; the outlet of the main capillary tube is connected to the inlet of the freezing evaporator; the outlet of the bypass capillary tube is connected to the inlet of the additional refrigerating evaporator; the outlets of the freezing evaporator and the additional refrigerating evaporator are both connected to the inlet of the refrigerating evaporator; the outlet of the refrigerating evaporator is connected to the inlet of the water storage apparatus and; the outlet of the water storage apparatus is connected to one end of the air intake tube and the other end is connected to the inlet of the compressor. 
   
   
       10 . A working method for the refrigerator as claimed in  claim 1 , wherein whether the ice making process is to be carried out or not is determined when the refrigerator is operating and if the ice making process is to be commenced, the evaporator of the freezer compartment is started and the fan is also started to cool the ice making room quickly to an ice-making quick-freezing temperature; when determining the ice making room is at a temperature-maintaining state or not and if the temperature doesn't reach the preset ice-making maintaining temperature, the evaporator of the freezer compartment is started and the fan is also started to cool the ice making room quickly to the ice-making maintaining temperature. 
   
   
       11 . A method as claimed in  claim 10 , wherein the quick-freezing temperature and the maintaining temperature of the ice making room are set below the preset temperature of the freezer compartment; preferably, the maintaining temperature of the ice making room is the same as the preset temperature of the freezer compartment. 
   
   
       12 . A method as claimed in  claim 11 , wherein the quick-freezing temperature and the maintaining temperature of the ice making room are set distinctively below the preset temperature of the freezer compartment. 
   
   
       13 . A method as claimed in  claim 10 , wherein when the freezer compartment has reached the preset temperature and the refrigerator compartment hasn't, the bypass circuit is turned on; the main evaporator of the refrigerator compartment of the main circuit, which has a relative small area for evaporation, is combined with an additional evaporator of the refrigerator compartment, which has a relative larger area for evaporation, and forms an evaporator of the refrigerator compartment that has very large evaporation area so as to adjust the temperature of the refrigerator compartment rapidly.