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公开(公告)号：US20240337401A1
公开(公告)日：2024-10-10
申请号：US18743804
申请日：2024-06-14
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takashi TAKAHASHI , Tsunahiro ODO , Shota TSURUZONO , Nobuki MATSUI , Takuya HANADA , Naotoshi FUJITA , Yoshiki YAMANOI , Yuta IYOSHI , Kumiko SAEKI , Takeru MIYAZAKI , Toshiyuki MAEDA , Tetsuya OKAMOTO
IPC: F24F11/43 , F24F11/81 , F24F11/84 , F24F140/20
CPC classification number: F24F11/43 , F24F11/81 , F24F11/84 , F24F2140/20
Abstract: A ventilation apparatus includes a processor; a compressor; a first heat exchanger; a first air flow path configured to supply air from outdoors to an indoor space after passing through the first heat exchanger; a second heat exchanger; a second air flow path configured to exhaust air from the indoor space to the outdoors after passing through the second heat exchanger; and a refrigerant circuit through which a refrigerant flows, the refrigerant circuit being connected to the compressor, and the first and second heat exchangers. The processor detects whether a predetermined reference indicating a possibility of frosting in the second heat exchanger is satisfied while the second heat exchanger is functioning as an evaporator, and controls a temperature of the refrigerant flowing through the second heat exchanger such that the second heat exchanger will have a temperature at which frosting does not occur, when the predetermined reference is satisfied.
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公开(公告)号：US20240240838A1
公开(公告)日：2024-07-18
申请号：US18622485
申请日：2024-03-29
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Kumiko SAEKI , Yuta IYOSHI , Yoshiki YAMANOI
Abstract: A cascade unit and a refrigeration cycle apparatus are capable of cooling an electric component. The cascade unit of the refrigeration cycle apparatus includes a primary-side refrigerant circuit that includes a primary-side heat exchanger and in which a primary-side refrigerant flows, a secondary-side refrigerant circuit that includes a secondary-side compressor and a utilization-side heat exchanger and in which a secondary-side refrigerant flows, and a cascade heat exchanger that causes the primary-side refrigerant and the secondary-side refrigerant to exchange heat with each other, the cascade unit including the secondary-side compressor, the cascade heat exchanger, a first electric component, a second electric component, a third electric component, and an electric component fan, and a cascade casing that accommodates the secondary-side compressor, the first electric component, and the electric component fan.
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Patent Agency Ranking
公开(公告)号：US20220390158A1
公开(公告)日：2022-12-08
申请号：US17887855
申请日：2022-08-15
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yuuta IYOSHI , Yoshiki YAMANOI , Kumiko SAEKI
Abstract: An outdoor unit 3 of an air conditioner 1 includes an outdoor control unit 31 having a first control mode and a second control mode different from each other as control modes of a refrigerant recovery operation for recovering a refrigerant of a refrigerant circuit 9. A flow rate of the refrigerant in the refrigerant circuit 9 in the first control mode is larger than a flow rate of the refrigerant in the refrigerant circuit 9 in the second control mode.
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公开(公告)号：US20240263826A1
公开(公告)日：2024-08-08
申请号：US18638848
申请日：2024-04-18
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takeru MIYAZAKI , Yoshiki YAMANOI , Yuta IYOSHI , Kumiko SAEKI
IPC: F24F11/65 , F24F12/00 , F24F110/10 , F24F120/10
CPC classification number: F24F11/65 , F24F12/001 , F24F2110/10 , F24F2120/10
Abstract: A ventilation system 1 includes: a refrigerant circuit 60; an air supply fan 22 that draws outdoor air into an indoor space through a first heat exchanger 12 of the refrigerant circuit 60; an exhaust fan 42 that exhausts indoor air to an outdoor space through a second heat exchanger 32 of the refrigerant circuit 60; a temperature sensor 24 for detecting a blow-out temperature TS of the air supply fan 22; a monitoring sensor 80 for detecting indoor state information CT; and a control unit CU that adjusts indoor ventilation rate. The types of control modes performed by the control unit CU include a first mode and a second mode described below. First mode: A control mode having higher weighting on the state information CT, among the state information CT and the blow-out temperature TS that are usable for adjusting the indoor ventilation rate. Second mode: A control mode having higher weighting on the blow-out temperature TS, among the state information CT and the blow-out temperature TS that are usable for adjusting the indoor ventilation rate.
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公开(公告)号：US20240240841A1
公开(公告)日：2024-07-18
申请号：US18621723
申请日：2024-03-29
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Kumiko SAEKI , Yuta IYOSHI , Yoshiki YAMANOI
Abstract: A safety valve includes a secondary-side refrigerant circuit that includes a secondary-side receiver that reserves a refrigerant, a flow path switching portion that includes a first connecting portion, a second connecting portion, and a third connecting portion connected to the secondary-side receiver, the flow path switching portion (96) that switches between a first state in which the third connecting portion communicates with the first connecting portion and a second state in which the third connecting portion communicates with the second connecting portion, and a safety valve that includes a safety valve connecting portion connected to the first connecting portion or the second connecting portion, and releases the refrigerant to outside when a refrigerant pressure in the secondary-side receiver satisfies a predetermined condition, in which at least the safety valve connecting portion is made of stainless steel.
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公开(公告)号：US20230324086A1
公开(公告)日：2023-10-12
申请号：US18204064
申请日：2023-05-31
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yuta IYOSHI , Yoshiki YAMANOI , Kumiko SAEKI
Abstract: A primary refrigerant circuit allows circulation of a primary refrigerant and includes a primary compressor, a cascade heat exchanger, and a primary heat exchanger. A secondary refrigerant circuit allows circulation of a secondary refrigerant and includes a secondary compressor, the cascade heat exchanger, and a utilization heat exchanger. The primary refrigerant circuit includes a first connecting pipe, a primary first connection pipe, and a liquid connecting pipe connecting the cascade heat exchanger and the primary heat exchanger, a primary suction flow path of the primary compressor, a primary subcooling circuit connecting the liquid connecting pipe and the primary suction flow path, and a primary subcooling expansion valve provided in the primary subcooling circuit.
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公开(公告)号：US20230019373A1
公开(公告)日：2023-01-19
申请号：US17945567
申请日：2022-09-15
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yuuta IYOSHI , Yoshiki YAMANOI , Kumiko SAEKI
Abstract: A valve opening circuit mounted on a heat pump device having a valve on a refrigerant circuit includes a DC electric path to which a DC voltage generated from an AC voltage for normal use is applied, a valve drive circuit that opens and closes the valve by using the DC voltage of the DC electric path, a control unit that acquires a control power source voltage based on the DC voltage of the DC electric path and controls the valve drive circuit, and a power feed port connected to the DC electric path and connectable to a DC power source line provided from outside for emergency. The control unit causes the valve drive circuit to open the valve when the AC voltage is lost and the DC voltage is fed from the DC power source line to the power feed port.
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