HEAT-PUMP AIR CONDITIONER
    1.
    发明公开

    公开(公告)号:EP3388758A1

    公开(公告)日:2018-10-17

    申请号:EP18176668.4

    申请日:2008-11-11

    发明人: ENYA, Atsushi

    IPC分类号: F25B13/00 F25B1/10 F25B47/00

    摘要: An object is to provide a heat-pump air conditioner that can reliably prevent an outdoor heat exchanger and a drain pan from freezing during heating, while maintaining high capacity and high performance, without affecting the cooling/heating capacity and performance. In a heat-pump air conditioner 1 provided with a gas injection circuit 33 that injects an intermediate-pressure refrigerant into an intermediate intake port 21A of a compressor 21, an auxiliary heat exchanger 24 having an anti-freezing function is provided at a lower part of the outdoor heat exchanger 23, and a liquefied injection circuit 36 is connected, which, after the intermediate-pressure refrigerant vaporized in the gas injection circuit 33 is switched by switching valves 34 and 35 to be introduced into the auxiliary heat exchanger 24, guides the refrigerant to the intermediate intake port 21A of the compressor 21.

    AIR-CONDITIONING DEVICE
    4.
    发明公开

    公开(公告)号:EP2674686A4

    公开(公告)日:2018-04-04

    申请号:EP11858451

    申请日:2011-02-07

    IPC分类号: F24F1/32

    摘要: In an air-conditioning apparatus 100 capable of a heating operation and having a refrigerant circuit A in which a compressor 10, a refrigerant flow switching device 11, a refrigerant flow path of a heat exchanger related to heat medium 15 that exchanges heat between a refrigerant and a heat medium, an expansion device 16, and a heat source-side heat exchanger 12 are connected by a refrigerant pipe to form a refrigeration cycle, and a heat medium circuit B in which a heat medium flow path of the heat exchanger related to heat medium 15, a pump 21, and a use-side heat exchanger 26 are connected by a heat medium pipe, the air-conditioning apparatus 100 comprises an opening and closing device 28 that is provided in a heat medium supply pipe 38 that supplies the heat medium to the heat medium circuit B from outside the circuit B, and that passes or cuts off the heat medium flowing from the heat medium supply pipe 38 to the heat medium circuit B, and an air release device 27 that is provided in the heat medium circuit B and releases air remaining within the heat medium circuit B, and performs the heating operation while opening the opening and closing device 28 and the air release device 27.

    AIR-CONDITIONING APPARATUS
    6.
    发明公开

    公开(公告)号:EP2413056A4

    公开(公告)日:2018-03-28

    申请号:EP09842231

    申请日:2009-03-26

    发明人: TAKATA SHIGEO

    IPC分类号: F25B13/00 F24D3/18

    摘要: An air-conditioning apparatus 100 has at least one intermediate heat exchanger 15 that exchanges heat between a refrigerant changing in two phases or a refrigerant in a supercritical state and a heat medium such as water and anti-freezing fluid different from the refrigerant, a refrigeration cycle in which a compressor 10, a heat-source side heat exchanger 12, at least one expansion valve 16, and a refrigerant-side channel of the intermediate heat exchanger 15 are connected via a pipeline through which the refrigerant flows, and a heat-medium circulation circuit in which a heat-medium side channel of the intermediate heat exchanger 15, a pump 21, and a use-side heat exchanger 26 are connected via a pipeline through which the heat medium flows, in which in the heat-medium circulation circuit, a fourth temperature sensor 34 that detects a temperature of the heat-medium flowing out of the use-side heat exchanger 26 is provided, and leakage of the heat medium from the heat-medium circulation circuit is detected on the basis of a change amount of a detected temperature of the fourth temperature sensor 34.