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公开(公告)号：US20220252281A1
公开(公告)日：2022-08-11
申请号：US17619283
申请日：2019-08-07
发明人： Naoya MUKAITANI , Shohei TAKENAKA , Takahito HIKONE , Kimitaka KADOWAKI , Yoshio YAMANO , Takuya ITO
摘要： A chilling unit includes a machine room unit to accommodate a compressor and a heat exchanger, and a plurality of air heat exchangers placed on top of the machine room unit. The air heat exchangers include a pair of air heat exchangers including two air heat exchangers opposite to each other in a lateral direction. They are inclined such that respective upper end portions of the two air heat exchangers have a spacing between each other greater than a spacing between respective lower end portions of the two air heat exchangers. In the lateral direction, the machine room unit has a top width greater than a heat-exchanger bottom width, the top width is one between side walls in a top face portion of the machine room unit, the bottom width is defined as a width between outer side faces of the respective lower end portions of the two air heat exchangers.
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公开(公告)号：US20210372655A1
公开(公告)日：2021-12-02
申请号：US17264045
申请日：2018-09-28
发明人： Koji FURUYA , Kimitaka KADOWAKI , Koji AZUMA , Yuji MOTOMURA , Yasushi OKOSHI
IPC分类号： F24F11/85 , F24F11/88 , F24F1/0059 , F24F1/08 , F24F1/14
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.-
公开(公告)号：US20210302046A1
公开(公告)日：2021-09-30
申请号：US17264040
申请日：2018-09-28
发明人： Naoto ISHII , Yuji MOTOMURA , Kimitaka KADOWAKI
摘要： An air-conditioning apparatus includes: a heat medium circulation circuit including: a heat medium device, a heat medium pipe, a pump, a heat medium detection unit, and a controller includes a count unit to count an air-conditioning operation time and count a pump operation time based on heat medium detection information of the heat medium detection unit, a storage unit storing a set air-conditioning time and a set pump time, a comparison unit to compare the air-conditioning operation time with the set air-conditioning time and compare the pump operation time with the set pump time, and a device control unit to control driving of the pump so that the pump operation time reaches or exceeds the set pump time when the air-conditioning operation time is longer than or equal to the set air-conditioning time and the pump operation time is shorter than the set pump time.
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公开(公告)号：US20210285673A1
公开(公告)日：2021-09-16
申请号：US17260307
申请日：2018-09-21
发明人： Kimitaka KADOWAKI
IPC分类号： F24F11/36 , F24F1/0007 , F24F1/32 , F24F11/58 , F24F11/85
摘要： An air-conditioning apparatus includes; an outdoor unit including a compressor that compresses and discharges refrigerant to a refrigerant circuit; an indoor unit including a load-side heat exchanger that causes heat exchange to be performed between air in an air-conditioned space and a heat medium subjected to heat exchange with the refrigerant; a flow rate detection unit that detects a flow rate of the heat medium; and an alarm unit provided in the indoor unit. The alarm unit includes a determination unit and an abnormality alarm unit. The determination unit determines whether an abnormality occurs in the indoor unit or not based on the flow rate detected by the flow rate detection unit. The abnormality alarm unit outputs an alarm when the determination unit determines that the abnormality occurs in the indoor unit.
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公开(公告)号：US20210033324A1
公开(公告)日：2021-02-04
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
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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公开(公告)号：US20210003306A1
公开(公告)日：2021-01-07
申请号：US16976573
申请日：2018-05-02
摘要： An air conditioning apparatus uses a heat medium containing at least one of cold water and hot water. The air conditioning apparatus includes: a heat source device; a heat exchanger configured to exchange heat between the heat medium and air; a flow rate control valve configured to control a flow rate at which the heat medium is supplied to the heat exchanger; a temperature sensor configured to detect a temperature of the heat medium discharged from the heat exchanger; and a failure determination unit configured to detect presence or absence of an abnormality in a flow path of the heat medium based on the temperature detected by the temperature sensor and a commanded degree of opening for the flow rate control valve.
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公开(公告)号：US20240240845A1
公开(公告)日：2024-07-18
申请号：US18558923
申请日：2021-05-27
发明人： Shunya GYOTOKU , Kimitaka KADOWAKI , Masahiro ITO
CPC分类号： F25B49/02 , F25B39/02 , F25B2600/2513 , F25B2700/21
摘要： A refrigeration cycle apparatus includes a refrigerant circuit and a non-azeotropic refrigerant that flows through a refrigerant pipe. When the non-azeotropic refrigerant passes through an outdoor heat exchanger, a temperature difference occurs between an inlet and an outlet of the outdoor heat exchanger. The outdoor heat exchanger includes: a group of fins that are stacked at intervals; and a heat transfer tube that extends through the group of fins in a stacking direction of the group of fins and allows the non-azeotropic refrigerant to flow inside the heat transfer tube. The group of fins includes: a first fin part to which frost can adhere in a humid environment; and a second fin part to which no frost adheres to ensure ventilation.
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公开(公告)号：US20240175614A1
公开(公告)日：2024-05-30
申请号：US18551763
申请日：2021-05-28
发明人： Kimitaka KADOWAKI , Yota MAEMA , Masahiro ITO , Shunya GYOTOKU , Kosuke KAWANO , Akinori KURACHI
CPC分类号： F25B49/02 , F24H4/02 , F25B2700/1933
摘要： Provided is a main refrigerant circuit in which a compressor having an injection port, a condenser, a main circuit expansion device unit, and an evaporator are connected by pipes to allow refrigerant to circulate in the main refrigerant circuit; an injection pipe an injection expansion device; an outside-air temperature detection device; a suction pressure detection device; and a controller, wherein the main circuit expansion device unit includes a plurality of main circuit expansion devices with different capacities and in a parallel-connected relationship, and during operation, when the controller determines that the temperature of the outside air is equal to or lower than a set temperature, the controller is configured to open the injection expansion device to control an opening degree to select the main circuit expansion device based on the suction pressure to control an opening degree of the selected main circuit expansion device.
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公开(公告)号：US20240019186A1
公开(公告)日：2024-01-18
申请号：US18251746
申请日：2021-01-05
CPC分类号： F25B49/02 , F25B13/00 , F25B43/006 , F25B2313/0292 , F25B2313/02742 , F25B2500/26 , F25B2600/2515 , F25B2400/23
摘要： In a refrigeration cycle apparatus, at start-up of heating, a controller sets a first four-way valve to an ON state and sets a second four-way valve to an OFF state so as to form a flow path in which refrigerant flows through a compressor, a load-side heat exchanger, a first expansion valve, a heat-source-side heat exchanger, and an accumulator and returns to the compressor, and during a heating operation, the controller sets the first four-way valve to the ON state and sets the second four-way valve to the ON state so as to form a flow path in which the refrigerant flows through the compressor, the load-side heat exchanger, the first expansion valve, the receiver, and the heat-source-side heat exchanger and returns to the compressor.
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公开(公告)号：US20230349565A1
公开(公告)日：2023-11-02
申请号：US18245392
申请日：2020-12-16
IPC分类号： F24F1/22
CPC分类号： F24F1/22
摘要： An outdoor unit of an air-conditioning apparatus, wherein the outdoor unit has a control box and an electrical box accommodated therein, in the control box, devices serving as a controller configured to control refrigeration cycle-related devices are accommodated, and in the electrical box, devices including a thermal relay are accommodated, the devices producing a smaller amount of heat compared to the devices accommodated in the control box, the electrical box being formed separately from the control box.
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