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公开(公告)号：US11808476B2
公开(公告)日：2023-11-07
申请号：US17263678
申请日：2018-09-21
摘要： A relay includes a first relay unit and a second relay unit provided between an outdoor unit and an indoor unit to allow refrigerant to circulate between the first relay unit and the outdoor unit and between the second relay unit and the outdoor unit, and a heat medium circuit connecting the first relay unit and the second relay unit to the indoor unit to allow a heat medium to circulate through the heat medium circuit. The second relay unit is installed above or on a top of the first relay unit.
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公开(公告)号：US11708995B2
公开(公告)日：2023-07-25
申请号：US17264045
申请日：2018-09-28
发明人： Koji Furuya , Kimitaka Kadowaki , Koji Azuma , Yuji Motomura , Yasushi Okoshi
摘要： An air-conditioning apparatus according to the present disclosure includes a heat medium circulation circuit, a heat-source-side device, and a voltage drop device. In the heat medium circulation circuit, a pump, an indoor heat exchanger, and a flow control device are connected by pipes to circulate the heat medium. The pump sends a heat medium that contains water or brine and transfers heat. The indoor heat exchanger causes heat exchange to be performed between the heat medium and an indoor air in an air-conditioned space. The flow control device controls a flow rate of the heat medium in the indoor heat exchanger. The heat-source-side device heats or cools the heat medium before the heat medium is sent to the indoor heat exchanger. The voltage drop device reduces a voltage that is applied to the pump based on a value of a current that is supplied to the pump, in association with a flow rate of the heat medium in the heat medium circulation circuit.
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公开(公告)号：US11408656B2
公开(公告)日：2022-08-09
申请号：US16968264
申请日：2018-03-07
发明人： Yasushi Okoshi , Takuya Ito , Yoshio Yamano , Takahiro Akizuki , Tomoyoshi Obayashi , Kimitaka Kadowaki , Naoya Mukaitani
摘要： A heat source device includes a heat medium channel through which a heat medium flows, a plurality of refrigerant circuits through which refrigerant circulates, and a plurality of heat-medium heat exchangers configured to cause heat exchange to be performed between the heat medium in the heat medium channel and the refrigerant in the refrigerant circuits. The plurality of heat-medium heat exchangers include a first heat-medium heat exchanger to which at least one of the refrigerant circuits is connected and a second heat-medium heat exchanger to which a greater number of the refrigerant circuits are connected than to the first heat-medium heat exchanger.
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公开(公告)号：US10563894B2
公开(公告)日：2020-02-18
申请号：US15750937
申请日：2015-08-28
发明人： Masahiro Ito , Kosuke Tanaka , Takuya Ito , Yasushi Okoshi , Kazuyuki Ishida
摘要： In a refrigeration cycle apparatus, a controller is configured to, when a defrost mode is started, control a first pressure reducing device is controlled to adjust a flow rate of refrigerant to bring a degree of superheat of the refrigerant at a suction side of a compressor close to a target value, control a flow path switching device to form a first flow path through which the refrigerant released from the compressor flows to a first heat exchanger; perform a refrigerant release operation of opening one of a second pressure reducing device and a valve and closing the other of the second pressure reducing device and the valve, and perform a refrigerant collection operation of opening the second pressure reducing device and the valve, with the flow path switching device retained to form the first flow path, after the refrigerant release operation.
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公开(公告)号：US11506432B2
公开(公告)日：2022-11-22
申请号：US17256625
申请日：2018-08-17
发明人： Takahito Hikone , Yasushi Okoshi , Takuya Ito
摘要： A cold water supply system cools water flowing through a water pipe, and supplies the water cooled to a cooling load, the cold water supply system including: an independent refrigerant circuit unit including a first compressor and a first water heat exchanger configured to exchange heat between refrigerant and the water to cool the water; a composite unit configured to cool the water, and a controller configured to control operation of the independent refrigerant circuit unit and operation of the composite unit, wherein the composite unit includes a free cooling unit including a pump and a second water heat exchanger configured to exchange heat between a heat medium and the water to cool the water, and a coupled refrigerant circuit unit including a second compressor and a third water heat exchanger configured to exchange heat between refrigerant and the water to cool the water, and the controller controls an operating frequency of the first compressor, an operating frequency of the second compressor, and an operating frequency of the pump based on a temperature of the water flowing out from the water pipe.
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公开(公告)号：US10724777B2
公开(公告)日：2020-07-28
申请号：US15754615
申请日：2015-10-08
发明人： Masahiro Ito , Takuya Ito , Yasushi Okoshi , Kazuyuki Ishida
摘要： A controller in a refrigeration cycle apparatus performs a refrigerant recovery operation when switching an operation mode from a defrosting mode to a heating mode. During the refrigerant recovery operation, by rotating a fan of a blower while monitoring a pressure at a discharge side of the compressor, the controller is configured to perform feedback control to cause a high-pressure side pressure to be close to a high-pressure side target pressure value. During the refrigerant recovery operation, by controlling a driving frequency of the compressor while monitoring a pressure at a suction side of the compressor, the controller is configured to perform feedback control to cause a low-pressure side pressure to be close to a low-pressure side target pressure value.
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公开(公告)号：US11384972B2
公开(公告)日：2022-07-12
申请号：US17254940
申请日：2018-08-17
发明人： Naoya Mukaitani , Takahito Hikone , Yoshio Yamano , Kimitaka Kadowaki , Takuya Ito , Yasushi Okoshi
IPC分类号： F25B49/02 , F25B6/02 , F24F1/68 , F24F11/46 , F24F11/83 , F24F11/30 , F24F11/85 , F24F140/20 , F24F1/06
摘要： A free cooling system includes a plurality of free cooling outdoor units each including a heat medium circuit, a controller, and a communication unit, the heat medium circuit being configured by connecting a heat medium pump, a first heat exchanger, and a heat source side of a second heat exchanger by pipes, a heat medium circulating in the heat medium circuit, the controller configured to control the heat medium pump, and the communication units performing communication with each other, wherein the plurality of free cooling outdoor units are coupled with each other by a load pipe that allows a load heat medium to flow to or flow out from a load side of each second heat exchanger.
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公开(公告)号：US11181304B2
公开(公告)日：2021-11-23
申请号：US16487891
申请日：2017-05-19
摘要： A chilling unit and a water circulation temperature control system includes a refrigerant circuit, a pipe through which a heat medium flows, a flow switching valve, a temperature sensor, a pressure sensor, and a controller. The refrigerant circuit includes a compressor, a pair of air-side heat exchangers, an expansion valve, and a heat-medium-side heat exchanger connected to each other by pipes. The flow switching valve switches between refrigerant-circulation routes. The controller controls the compressor in accordance with a target outlet temperature, the heat medium temperature detected by the temperature sensor, and a heat medium pressure difference detected by the pressure sensor. When a load on an air handler decreases to a low level and is equal to or less than the compressor's lowest capacity, the controller controls the flow switching valve so that one of the air-side heat exchangers and the heat-medium-side heat exchanger are connected in parallel.
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公开(公告)号：US10401042B2
公开(公告)日：2019-09-03
申请号：US15565246
申请日：2016-04-20
IPC分类号： F24H3/06 , F24F1/16 , F25B1/00 , F24F1/18 , F24F1/20 , F25B39/00 , F28D1/047 , F28D21/00 , F28B1/06
摘要： Air heat exchangers are composed of a first air heat exchanger through a fourth air heat exchanger, which are formed in a L shape, which include long side portions and short side portions in a state where one end portion sides in an extension direction of tubes, in which a coolant is flowed, are bent; and each of the short side portions is disposed at a short hand side of a rectangular shape, in such a way that an arrangement shape of the first air heat exchanger through the fourth air heat exchanger is formed as a frame shape having a rectangular shape viewed from a plane.
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公开(公告)号：US11913694B2
公开(公告)日：2024-02-27
申请号：US16966090
申请日：2018-03-07
发明人： Kazuki Hayashida , Yasushi Okoshi , Takuya Ito , Yoshio Yamano , Kimitaka Kadowaki , Takahiro Akizuki
CPC分类号： F25B47/02 , F24F11/42 , F24F11/74 , F25B13/00 , F25B49/02 , F24F2110/10 , F25B2700/11 , F25B2700/2103 , F25B2700/2104
摘要： A heat pump system includes a refrigerant circuit in which a compressor, a refrigerant flow path included in a heat medium heat exchanger, an expansion valve, and a heat source side heat exchanger are connected, the heat medium heat exchanger including the refrigerant flow path and a heat medium flow path; a heat medium feed path connected to the heat medium flow path included in the heat medium heat exchanger; an indoor unit connected to the heat medium feed path and configured to condition air inside a room; a room temperature sensor configured to detect an indoor temperature in the room; a heat medium temperature sensor configured to detect a temperature of a heat medium that flows into the indoor unit; and a controller configured to control the refrigerant circuit or the indoor unit by using a set temperature in the room.
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