Refrigeration unit with a liquid heat source and reduced condensation at a utilization unit

A refrigeration apparatus comprising:

• a heat source unit including a compressor configured to compress a refrigerant, a first heat exchanger configured to cause heat exchange between the refrigerant and liquid fluid, a second heat exchanger configured to cause heat exchange between the refrigerant and air, a casing accommodating the compressor, the first heat exchanger, and the second heat exchanger, and a valve configured to switch to supply or not to supply the second heat exchanger with the refrigerant;
• a utilization unit including a utilization heat exchanger, the utilization unit and the heat source unit constituting a refrigerant circuit;
• a controller configured to control to operate the compressor and open or close the valve;
• and
• a temperature sensor configured to measure temperature of the refrigerant flowing in the utilization heat exchanger,
• wherein the controller is configured to
• open the valve to supply the second heat exchanger with the refrigerant to cause the second heat exchanger to function as a heat absorber when assessing that the refrigerant sent to the utilization unit needs to be decreased in quantity during cooling operation in which the first heat exchanger functions as a radiator,
• assess whether or not the refrigerant sent to the utilization unit needs to be decreased in quantity in accordance with a state of the utilization unit, and
• assess whether or not the refrigerant sent to the utilization unit needs to be decreased in quantity in accordance with the temperature measured by the temperature sensor.

A refrigeration apparatus comprising:

• a heat source unit including a compressor configured to compress a refrigerant, a first heat exchanger configured to cause heat exchange between the refrigerant and liquid fluid, a second heat exchanger configured to cause heat exchange between the refrigerant and air, a casing accommodating the compressor, the first heat exchanger, and the second heat exchanger, and a valve configured to switch to supply or not to supply the second heat exchanger with the refrigerant;
• a utilization unit including a utilization heat exchanger, the utilization unit and the heat source unit constituting a refrigerant circuit;
• a controller configured to control to operate the compressor and open or close the valve;
• a bypass pipe connecting a suction tube and a discharge tube of the compressor;
• and
• a bypass valve provided on the bypass pipe,
• wherein the controller is configured to
• open the valve to supply the second heat exchanger with the refrigerant to cause the second heat exchanger to function as a heat absorber when assessing that the refrigerant sent to the utilization unit needs to be decreased in quantity during cooling operation in which the first heat exchanger functions as a radiator,
• control to operate the bypass valve, and
• control to open the bypass valve when assessing that the refrigerant sent to the utilization unit needs to be further decreased in quantity after the second heat exchanger functions as a heat absorber during the cooling operation.