Refrigeration System

A refrigeration system comprising a refrigerant circuit connected with a compressor, a condenser, an electronic expansion valve, and an evaporator and operating in a refrigeration cycle while refrigerant is circulated through the refrigerant circuit, the degree of opening of the electronic expansion valve being adjusted according to the degree of superheat of refrigerant at the evaporator side while being forcibly reduced under conditions that the high pressure in the refrigerant circuit is above a specified pressure,

• said refrigeration system further comprising an evaporator fan for delivering an indoor air to the evaporator and a controller for, when the amount of the refrigerant circulating through the refrigerant circuit is judged to be insufficient, changing operation of the evaporator fan from continuous operation to intermittent operation.

A refrigeration system comprising a refrigerant circuit connected with a compressor, a condenser, an electronic expansion valve, and an evaporator and operating in a refrigeration cycle while refrigerant is circulated through the refrigerant circuit, the degree of opening of the electronic expansion valve being adjusted according to the degree of superheat of refrigerant at the evaporator side while being forcibly reduced under conditions that the high pressure in the refrigerant circuit is above a specified pressure,

• wherein the refrigerant circuit is provided with a bypass pipe connected at one end between the compressor and the condenser and connected at the other end between the electronic expansion valve and the evaporator and a closing/opening valve for closing and opening the bypass pipe, and
• the refrigeration system further comprises a controller for, when the amount of the refrigerant circulating through the refrigerant circuit is judged to be insufficient, opening the closing/opening valve.