A cooling device

Abstract

By means of the present invention, a cooling device ( 9 ) is realized, that prevents the fresh food compartment ( 10 ) to be cooled unnecessarily while the door ( 12 ) of the fresh food compartment ( 10 ) is open, that prevents formation of frost on the first evaporator ( 7 ) even when the user keeps the door ( 12 ) of the fresh food compartment ( 10 ) open frequently and/or for a long time while the compressor ( 1 ) is operating, thus decreasing the requirement of performing a special defrost cycle, furthermore that directs the refrigerant fluid only to the freezing compartment ( 11 ) while the door ( 12 ) of the fresh food compartment ( 10 ) is open during the refrigeration cycle, enabling preferably to maintain additional cooling in the freezing compartment ( 11 ), that enables the compressor ( 1 ) to be used more effectively, enabling a more effective refrigeration to be performed and hence providing energy saving.

1 . A cooling device ( 9 ) comprising a fresh food compartment ( 10 ) having a door ( 12 ), wherein products to be cooled are placed, a freezing compartment ( 11 ) wherein products to be frozen are placed, a compressor ( 1 ) that enables the refrigerant fluid to be compressed and circulated in a refrigeration cycle, a condenser ( 3 ) that enables the compressed refrigerant fluid to be condensed by cooling, a first evaporator ( 7 ) that cools the fresh food compartment ( 10 ), a second evaporator ( 8 ) that cools the freezing compartment ( 11 ) and that is connected in series to the first evaporator ( 7 ), at least one capillary ( 6 ) disposed after the condenser ( 3 ) and prior to the evaporators ( 7 ,  8 ) with respect to flow direction of the refrigerant fluid, which enables the flow of the refrigerant fluid to be regulated, and a sensor ( 13 ) that detects the opening and closing of the fresh food compartment ( 10 ) door ( 12 ), characterized by a valve ( 5 ) disposed after the condenser ( 3 ), that directs the refrigerant fluid to both of the two evaporators ( 7 ,  8 ) while the door ( 12 ) is closed, and directs the refrigerant fluid only to the second evaporator ( 8 ) while the door ( 12 ) is open and a control unit ( 4 ) that enables the position of the valve ( 5 ) to be changed. 
     
     
         2 . A cooling device ( 9 ) as in  claim 1 , characterized by the first evaporator ( 7 ) disposed after the valve ( 5 ), the second evaporator ( 8 ) disposed after the first evaporator ( 7 ) and a by-pass line ( 2 ) that extends between the valve ( 5 ) and the inlet of the second evaporator ( 8 ). 
     
     
         3 . A cooling device ( 9 ) as in  claim 2 , characterized by the valve ( 5 ) that directs the refrigerant fluid to the by-pass line ( 2 ) when the door ( 12 ) is detected to be open by the sensor ( 13 ). 
     
     
         4 . A cooling device ( 9 ) as in  claim 3 , characterized by the capillary ( 6 ) disposed after the valve ( 5 ) and prior to the first evaporator ( 7 ), through which the refrigerant fluid passes while the valve ( 5 ) is in the first position and a second capillary ( 106 ) disposed on the by-pass line ( 2 ), through which the refrigerant fluid passes while the valve ( 5 ) is in the second position. 
     
     
         5 . A cooling device ( 9 ) as in  claim 1 , characterized by the second evaporator ( 8 ) disposed after the condenser ( 3 ), the valve ( 5 ) disposed after the second evaporator ( 8 ), the first evaporator ( 7 ) disposed after the valve ( 5 ) and a by-pass line ( 2 ) that extends between the valve ( 5 ) and the outlet of the first evaporator ( 7 ). 
     
     
         6 . A cooling device ( 9 ) as in  claim 5 , characterized by the valve ( 5 ) that directs the refrigerant fluid passing through the second evaporator ( 8 ) to the by-pass line ( 2 ) when the door ( 12 ) is detected to be open by the sensor ( 13 ).