Refrigeration cycle device

Abstract

In a refrigeration cycle device in which heat generated by heat absorption of an evaporator is used for heating in a condenser, a disadvantage that a cooling capacity of the evaporator deteriorates owing to shortage or drop of an amount of the heat to be rejected from the condenser is securely avoided and a cooling function is maintained. In the refrigeration cycle device which is provided with a refrigerant circuit including a compressor, a condenser, an expansion valve and an evaporator and which exhibits a heating function by the heat rejected from the condenser and which exhibits the cooling function by the heat absorption of the evaporator, an operation to secure a predetermined amount of the heat to be rejected from the condenser is executed in order to maintain the cooling function of the evaporator based on an index capable of grasping the amount of the heat to be rejected from the condenser.

1 . A refrigeration cycle device which is provided with a refrigerant circuit including a compressor, a condenser, a throttling means and an evaporator and which exhibits a heating function by heat rejected from the condenser and which exhibits a cooling function by heat absorption of the evaporator,
 wherein an operation to secure a predetermined amount of heat to be rejected from the condenser is executed in order to maintain the cooling function of the evaporator based on an index capable of grasping the amount of the heat to be rejected from the condenser.   
   
   
       2 . A refrigeration cycle device which is provided with a refrigerant circuit including a compressor, a condenser, a throttling means and an evaporator; and a hot water storage tank and which performs heat exchange between water stored in the hot water storage tank and the condenser to generate hot water by heat rejected from the condenser and store the hot water in the hot water storage tank and which exhibits a cooling function by heat absorption of the evaporator,
 the device comprising: a water supply unit which supplies water into the hot water storage tank; and a discharge unit which discharges the water from the hot water storage tank,   wherein in a case where a temperature of the water stored in the hot water storage tank, a temperature of water to be circulated through a heat exchanger which performs heat exchange between the condenser and the water stored in the hot water storage tank, a temperature in the condenser or a temperature of a refrigerant discharged from the condenser rises to a predetermined value or more, the water is discharged from the hot water storage tank by the discharge unit.   
   
   
       3 . A refrigeration cycle device which is provided with a refrigerant circuit including a compressor, a condenser, a throttling means and an evaporator and which performs heat exchange between water and the condenser to generate hot water by heat rejected from the condenser and which exhibits a cooling function by heat absorption of the evaporator,
 the device comprising: a water cooling unit which cools the water to be subjected to the heat exchange between the water and the condenser,   wherein in a case where a temperature of the water to be subjected to the heat exchange between the water and the condenser, a temperature in the condenser or a temperature of a refrigerant discharged from the condenser rises to a predetermined value or more, the water is cooled by the water cooling unit.   
   
   
       4 . A refrigeration cycle device which is provided with a refrigerant circuit including a compressor, a condenser, a throttling means and an evaporator and which performs heat exchange between water and the condenser to generate hot water by heat rejected from the condenser and which exhibits a cooling function by heat absorption of the evaporator,
 the device comprising: a second condenser which cools a refrigerant discharged from the condenser,   wherein in a case where a temperature of the water to be subjected to the heat exchange between the water and the condenser, a temperature in the condenser or a temperature of the refrigerant discharged from the condenser rises to a predetermined value or more, the refrigerant discharged from the condenser is cooled by the second condenser.   
   
   
       5 . A refrigeration cycle device which is provided with a refrigerant circuit including a compressor, a condenser, a throttling means and an evaporator and which performs heat exchange between water and the condenser to generate hot water by heat rejected from the condenser and which exhibits a cooling function by heat absorption of the evaporator,
 the device comprising: a second condenser connected to the condenser and disposed in parallel with the condenser,   wherein in a case where a temperature of the water to be subjected to the heat exchange between the water and the condenser, a temperature in the condenser or a temperature of a refrigerant discharged from the condenser rises to a predetermined value or more, the refrigerant is passed through the second condenser.