| CPC F24F 11/84 (2018.01) [F24F 1/0068 (2019.02)] | 16 Claims |
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1. A heat pump, comprising:
an outdoor unit including a compressor that compresses a refrigerant and at least one outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air;
a hybrid unit including at least one fluid-refrigerant heat exchanger that exchanges heat between the refrigerant supplied from the outdoor unit and a fluid, and at least one refrigerant control valve that controls an amount of the refrigerant flowing through the at least one fluid-refrigerant heat exchanger;
a plurality of indoor units each including an indoor heat exchanger that exchanges heat between the fluid supplied from the hybrid unit and indoor air; and
a controller configured to:
calculate operation loads of the plurality of indoor units;
calculate an amount of change in a total operation load of the plurality of indoor units based on a difference between previously calculated operation loads of the plurality of indoor units and the calculated operation loads of the plurality of indoor units;
when an operation mode of the plurality of indoor units connected to the at least one fluid-refrigerant heat exchanger is a cooling mode, determine an opening degree of the at least one refrigerant control valve according to a first value obtained by multiplying the amount of change in the total operation load by a first ratio;
when the operation mode is a heating mode, determine the opening degree of the at least one refrigerant control valve according to a second value obtained by multiplying the amount of change in the total operation load by a second ratio that is smaller than the first ratio; and
control the at least one refrigerant control valve based on the determined opening degree of the at least one refrigerant control valve, wherein the opening degree of the at least one refrigerant control valve increases as the amount of change in the total operation load increases.
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10. A method for operating a heat pump including an outdoor unit, a hybrid unit, and a plurality of indoor units, the method comprising:
calculating operation loads of the plurality of indoor units;
calculating an amount of change in a total operation load of the plurality of indoor units based on a difference between previously calculated operation loads of the plurality of indoor units and the calculated operation loads of the plurality of indoor units;
when an operation mode of the plurality of indoor units connected to at least one fluid-refrigerant heat exchanger that exchanges heat between a refrigerant and a fluid is a cooling mode, determining an opening degree of at least one refrigerant control valve of the hybrid unit according to a first value obtained by multiplying the amount of change in the total operation load by a first ratio, wherein the at least one refrigerant control valve controls an amount of the refrigerant flowing through the at least one fluid-refrigerant heat exchanger;
when the operation mode is a heating mode, determining the opening degree of the at least one refrigerant control valve according to a second value obtained by multiplying the amount of change in the total operation load by a second ratio that is smaller than the first ratio; and
controlling the at least one refrigerant control valve based on the determined opening degree of the at least one refrigerant control valve, wherein the opening degree of the at least one refrigerant control valve increases as the amount of change in the total operation load increases.
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