Refrigeration device

A refrigeration device configured to be used in a heating mode and a cooling mode, comprising:

• to constitute a refrigerant circuit, a compressor, a switching device, a plurality of utilization side heat exchangers, at least one expansion valve and a heat source side heat exchanger fluidly connected in series in this order when the refrigerant device is used in a heating mode,
• a branch pipe arranged on a downstream side of the switching device when the refrigerant device is operated in the heating mode, the branch pipe connecting the switching device to a first refrigerant pipe and a second refrigerant pipe, wherein
• the first refrigerant pipe extends to a first utilization side heat exchanger of the plurality of utilization side heat exchangers and comprises a first valve configured to at least fully open and fully close the first refrigerant pipe, and
• the second refrigerant pipe extends to a second utilization side heat exchanger of the plurality of utilization side heat exchangers and comprises a second valve configured to at least fully open and fully close the second refrigerant pipe,
• the refrigeration device further comprises a controller, which is configured to control the operation of the first valve and the second valve,
• wherein
• when the first utilization side heat exchanger and the second utilization side heat exchanger are both operated when the refrigeration device is used in the heating mode, the controller is configured to compare a predetermined capacity of the heat source side heat exchanger and/or the compressor with a required capacity of the first utilization side heat exchanger and the second utilization side heat exchanger, and
• when the required capacity exceeds the predetermined capacity, the controller is configured to close the first valve or the second valve.