Air-conditioning apparatus
AssigneeMitsubishi Electric Corporation
InventorsKoji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatomura
Life of this patent
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Abstract
To provide an air-conditioning apparatus that is safer and has small conveying power for such as water at the indoor unit side can be made small. It is characterized in that a compressor 10 and a heat source side heat exchanger 12 are accommodated in a heat source apparatus 1, an intermediate heat exchanger 15 and a pump 21 in a relay unit 3, a use side heat exchanger 26 in an indoor unit 2, respectively, and when a controller 60 makes the compressor 10 stop based on the thermo-off due to decrease in the heat load in the use side heat exchanger 26 or an operation stop instruction, the controller 60 makes the pump 21 stop after the compressor 10 is stopped or almost at the same time as the stop.
Claims9
An air-conditioning apparatus, comprising:
- at least one intermediate heat exchanger that exchanges heat between a refrigerant and a heat medium that is different from said refrigerant;
- a refrigeration cycle with which a compressor, an outdoor heat exchanger, at least one expansion valve, and a refrigerant side flow path of said intermediate heat exchanger are connected via piping through which said refrigerant flows;
- a heat medium circulation circuit with which a heat medium side flow path of said intermediate heat exchanger, a pump, and a use side heat exchanger are connected via piping through which said heat medium flows;
- a first controller that is configured to control drive of said compressor;
- and
- a second controller that is configured to control drive of said pump, wherein
- said compressor, said outdoor heat exchanger, and said first controller are accommodated in a heat source device,
- said intermediate heat exchanger, said pump, and said second controller are accommodated in a relay unit, and
- said use side heat exchanger is accommodated in an indoor unit,
- a first and second controller are communicably configured, and
- said first and second controllers are configured to perform operation by communication to stop said pump after the stop of said compressor when stopping said compressor based on thermo-off due to decrease in air-conditioning load in said use side heat exchanger or an operation stop instruction.
An air-conditioning apparatus, comprising:
- at least one intermediate heat exchanger that exchanges heat between a refrigerant and a heat medium that is different from said refrigerant;
- a refrigeration cycle with which a compressor, an outdoor heat exchanger, at least one expansion valve, and a refrigerant side flow path of said intermediate heat exchanger are connected via piping through which said refrigerant flows;
- a heat medium circulation circuit with which a heat medium side flow path of said intermediate heat exchanger, a pump, and a use side heat exchanger are connected via piping through which said heat medium flows;
- a first controller that is configured to control drive of said compressor;
- and
- a second controller that is configured to control drive of said pump, wherein
- said compressor, said outdoor heat exchanger, and said first controller are accommodated in a heat source device,
- said intermediate heat exchanger, said pump, and said second controller are accommodated in a relay unit, and
- said use side heat exchanger is accommodated in an indoor unit,
- a first and second controller are communicably configured, and
- said first and second controllers are configured to perform operation by communication to stop said pump after the stop of said compressor when stopping said compressor based on thermo-off due to decrease in air-conditioning load in said use side heat exchanger or an operation stop instruction wherein
- a flow amount adjustment valve is provided that adjusts a flow amount of said heat medium to flow through said each use side heat exchanger at either inlet side or outlet side of the heat medium side flow path of said use side heat exchanger, and
- said second controller is configured to stop said pump before stopping all the heat medium flow paths by said flow amount adjustment valve corresponding to the last use side heat exchanger in operation when said last use side heat exchanger in operation is stopped.
Dependencies are inferred from the claim text.