| 摘要 |
Provided by the present invention is a refrigeration system having a hot gas defrosting cycle, which comprises: a compressor which compresses refrigerant gas at high temperatures and pressure and is connected with a discharge line where the compressed refrigerant gas is discharged and a temperature measuring means is installed; a condenser which is connected with a refrigerant gas line, where the refrigerant gas of the high temperature and pressure flows, by the compressor in the front side and liquefies the refrigerant gas by decreasing the temperature of the refrigerant gas; an expansion valve which is connected with a refrigerant line, where the refrigerant liquefied by the condenser flows, in the front side and expands the refrigerant to be easy to evaporate in an evaporator by reducing the pressure of the refrigerant; the evaporator which reduces a temperature by absorbing heat in the refrigeration system using evaporation heat by evaporating the refrigerant supplied from the expansion valve; a liquid heater which is installed in a return line between the evaporator and the compressor and evaporates and sends the refrigerant to the compressor; a hot gas line which performs a defrosting operation by sending the refrigerant gas of the high temperature and pressure to the expansion valve from the discharge line; a four-way valve which controls the flow of the refrigerant gas by being installed at a junction of the discharge line, the refrigerant gas line, and the hot gas line; a pressure discharge line which is connected with the four-way valve and enables the four-way valve to operate smoothly by discharging the internal pressure; and an intake line which is connected with the rear side of the condenser and enables the refrigerant liquefied by the condenser to be supplied to the compressor through a capillary tube by opening a solenoid valve when the temperature of the refrigerant gas is measured as overheating by the temperature measuring means. |
