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1. 发明公开

EP4166873A1 REFRIGERATION CYCLE DEVICE 审中-实审
公开(公告)号：EP4166873A1
公开(公告)日：2023-04-19
申请号：EP20940299.9
申请日：2020-06-10
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： OCHIAI, Yasutaka
IPC分类号： F25B49/02
摘要： A refrigeration cycle apparatus includes an outdoor unit including a compressor and an outdoor heat exchanger, a plurality of indoor units each including an indoor heat exchanger and an expansion device, a relay unit intervening between the outdoor unit and each of the plurality of indoor units and serving to cause refrigerant from the outdoor unit to branch off into each of the indoor units, a refrigerant circuit in which the compressor, the outdoor heat exchanger, the expansion device and the indoor heat exchanger are connected by refrigerant pipes and through which refrigerant circulates, and a controller configured to control the plurality of indoor units. The relay unit includes a plurality of high-pressure valves each provided in a corresponding one of a plurality of high-pressure pipes connecting a high-pressure side of the outdoor unit and each of the indoor units and a plurality of low-pressure valves each provided in a corresponding one of a plurality of low-pressure pipes connecting a low-pressure side of the outdoor unit and each of the indoor units. The controller is configured to, when an operation state of at least one of the indoor units is changed from a first state to a second state, judge, based on a degree of supercooling of an outlet of the outdoor heat exchanger or the indoor heat exchanger that functions as a condenser or based on a degree of superheating of a suction side of the compressor, whether an abnormality is present in the plurality of high-pressure valves or the plurality of low-pressure valves.

2. 发明公开

EP4155630A1 REFRIGERATION CYCLE DEVICE 审中-实审
公开(公告)号：EP4155630A1
公开(公告)日：2023-03-29
申请号：EP20936885.1
申请日：2020-05-20
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： OCHIAI, Yasutaka
IPC分类号： F25B49/02
摘要： A refrigeration cycle apparatus includes: a refrigerant circuit in which a compressor, a condenser, an expansion device, and an evaporator are connected by pipes, and refrigerant circulates; a high-pressure sensor that detects a pressure of the refrigerant on a discharge side of the compressor; a first temperature sensor that detects a temperature of the refrigerant on an outlet side of the condenser; and a controller that determines that the high-pressure sensor is abnormal, when the compressor is in operation and the temperature detected by the first temperature sensor is higher than a saturated liquid temperature or a saturated gas temperature that is calculated from the pressure detected by the high-pressure sensor.

3. 发明公开

EP3982063A1 REFRIGERATION CYCLE DEVICE 审中-公开
公开(公告)号：EP3982063A1
公开(公告)日：2022-04-13
申请号：EP19931732.2
申请日：2019-06-04
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： OCHIAI, Yasutaka
IPC分类号： F25B49/02 , F24F11/38 , F25B13/00 , F24F140/12 , F24F140/20
摘要： A refrigeration cycle apparatus includes a refrigeration cycle circuit connecting a compressor, a refrigerant flow switching device, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, a first junction portion provided between the outdoor heat exchanger and the expansion valve and configured to divide refrigerant, a second junction portion provided between the indoor heat exchanger and the refrigerant flow switching device and configured to divide the refrigerant, a bypass pipe connecting the first junction portion and the second junction portion and configured to cause the refrigerant to flow through the bypass pipe, a first valve provided between the second junction portion and the refrigerant flow switching device, a second valve provided to the bypass pipe, a first temperature sensor configured to measure a temperature in a room to which air passing through the indoor heat exchanger is provided, and a second temperature sensor configured to measure a temperature of refrigerant at a liquid portion of the indoor heat exchanger. In an operation status in which the compressor operates, the expansion valve is fully closed, the first valve is opened, and the second valve is closed, when a temperature measured by the first temperature sensor and a temperature measured by the second temperature sensor are different from each other, the refrigeration cycle apparatus is configured to detect an abnormality at at least one of the expansion valve and the second valve.

4. 发明公开

EP3929506A1 REFRIGERATION CYCLE DEVICE 审中-公开
公开(公告)号：EP3929506A1
公开(公告)日：2021-12-29
申请号：EP19916268.6
申请日：2019-08-01
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： OCHIAI, Yasutaka , KOMATSU, Kazuhiro , TASAKI, Nobuaki
IPC分类号： F25B49/02 , F25B1/00
摘要： A refrigeration cycle apparatus includes a refrigeration cycle circuit, a bypass flow path, a first valve provided in the refrigeration cycle circuit, a second valve provided at the bypass flow path, a first temperature sensor configured to detect a temperature of an indoor space, a second temperature sensor configured to detect a temperature of refrigerant on a liquid side of an indoor heat exchanger, and a notification part. The refrigeration cycle apparatus is able to operate in an operation state where the compressor operates, the indoor heat exchanger functions as an evaporator, and the first valve is open while the second valve is closed. In the operation state, the notification part issues notification of an abnormality of an electronic expansion valve or the first valve when a temperature detected by the second temperature sensor is higher than an evaporation temperature of refrigerant in the refrigeration cycle circuit.

5. 发明公开

EP3819564A1 REFRIGERATION CYCLE DEVICE 有权
公开(公告)号：EP3819564A1
公开(公告)日：2021-05-12
申请号：EP18925175.4
申请日：2018-07-06
申请人： Mitsubishi Electric Corporation
发明人： OCHIAI, Yasutaka
IPC分类号： F25B49/02
摘要： A refrigeration cycle apparatus includes a first valve provided in a first section, a second valve provided in a second section, a pressure sensor provided in a third section between the first valve and the second valve including an indoor heat exchanger, a temperature sensor configured to detect an ambient temperature of the third section, and a controller. The controller is configured to set the first valve in a closed state at a first timing at which a compressor is stopped, set the second valve in a closed state at a second timing, acquire a pressure Pb representing a pressure of the third section, at the first timing, at a moment between the first timing and the second timing, at the second timing, or during an operation of the compressor, and when relationships Pa

6. 发明授权

EP2413065B1 REFRIGERATOR 有权
公开(公告)号：EP2413065B1
公开(公告)日：2019-05-08
申请号：EP10755635.9
申请日：2010-03-19
申请人： Mitsubishi Electric Corporation
发明人： SATA, Hiroshi , ISHIKAWA, Tomotaka , OCHIAI, Yasutaka , TANAKA, Kousuke , IKEDA, Takashi
IPC分类号： F25B1/00 , F25B1/10 , F25B6/02 , F25B41/00 , F25B49/02

7. 发明公开

EP2472203A1 REFRIGERATING AND AIR-CONDITIONING DEVICE 有权
标题翻译： KHHL- UND KLIMAANLAGENVORRICHTUNG
公开(公告)号：EP2472203A1
公开(公告)日：2012-07-04
申请号：EP10824577.0
申请日：2010-04-21
申请人： Mitsubishi Electric Corporation
发明人： OCHIAI, Yasutaka , TANAKA, Kosuke
IPC分类号： F25B49/02
CPC分类号： F25B49/005 , F24F11/36 , F25B2345/003 , F25B2400/13 , F25B2500/19 , F25B2500/222 , F25B2600/05 , F25B2700/04
摘要： When an operating state indicated by a set of operation data measured during normal operation becomes a state satisfying an operation data obtaining condition, the set of operation data at the time is obtained as a set of operation data for initial learning, and an inner volume of a refrigerant extension piping is calculated based on the obtained set of operation data for initial learning. A total amount of refrigerant in a refrigerant circuit 10 is calculated based on the calculated inner volume of the refrigerant extension piping and the current set of operation data, and the calculated total refrigerant is compared with a reference amount of refrigerant to determine a presence or absence of refrigerant leakage.
摘要翻译：当在正常操作期间测量的一组操作数据指示的操作状态变为满足操作数据获取条件的状态时，作为初始学习的一组操作数据获得该时间的操作数据集，基于获得的用于初始学习的操作数据集计算制冷剂延长管道。基于计算出的制冷剂延长配管的内部容积和当前的运转数据组合，计算制冷剂回路10中的制冷剂的总量，并将计算的总制冷剂与制冷剂的参考量进行比较，以确定是否存在的制冷剂泄漏。

8. 发明公开

EP4318154A1 DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD 失效
公开(公告)号：EP4318154A1
公开(公告)日：2024-02-07
申请号：EP21933003.2
申请日：2021-03-24
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： WADA, Makoto , OCHIAI, Yasutaka , KURIYAMA, Toshiyuki , NAKATA, Masanori
IPC分类号： G05B23/02 , G01M99/00 , F24F11/38
摘要： A normalization unit (102) acquires a normalized reference value being a value obtained from normalization of a reference value according to a predetermined normalization rule, the reference value being a status value acquired from an air conditioner (200) during a normal estimation period during which the air conditioner (200) is estimated to operate normally, the status value indicating an operational status of the air conditioner (200). An acquiring unit (101) acquires from the air conditioner (200), the status value as a diagnosis value during a diagnosis period during which it is not clear whether or not the air conditioner (200) operates normally and which is after the normal estimation period. The normalization unit (102) normalizes the diagnosis value according to the normalization rule. A diagnosis unit (104) diagnoses the operational status of the air conditioner (200) during the diagnosis period, using the normalized reference value and a normalized diagnosis value obtained from the normalization of the diagnosis value by the normalization unit (102).

9. 发明授权

EP3051235B1 OIL LEVEL DETECTION DEVICE AND REFRIGERATING AIR CONDITIONER EQUIPPED WITH SAME 有权
公开(公告)号：EP3051235B1
公开(公告)日：2020-02-26
申请号：EP14848892.7
申请日：2014-09-09
申请人： Mitsubishi Electric Corporation
发明人： OCHIAI, Yasutaka , UNEZAKI, Fumitake
IPC分类号： F25B31/00 , F25B13/00 , F25B49/02

10. 发明公开

EP3591311A1 REFRIGERATION CYCLE DEVICE 有权
公开(公告)号：EP3591311A1
公开(公告)日：2020-01-08
申请号：EP17898433.2
申请日：2017-03-01
申请人： Mitsubishi Electric Corporation
发明人： OCHIAI, Yasutaka , NAKANO, Haruo , TSUKINO, Hideki , HORIBA, Ryohei , SUZUKI, Yasuhiro
IPC分类号： F25B1/00 , F25B41/04 , F25B49/02
摘要： A refrigeration cycle apparatus includes a refrigeration cycle circuit, a liquid receiver, a first valve and a second valve. The refrigeration cycle circuit includes a compressor, an outdoor heat exchanger and an indoor heat exchanger. The liquid receiver is provided in a second section located in the refrigeration cycle circuit. The second section is a section extending between the outdoor heat exchanger and the indoor heat exchanger without extending through the compressor. The first valve is provided in a first section in the refrigeration cycle circuit, and is a solenoid valve or a motor valve. The first section is a section extending between the outdoor heat exchanger and the indoor heat exchanger through the compressor. The second valve is provided in the second section and between the liquid receiver and the indoor heat exchanger, and is an electronic expansion valve, a solenoid valve or a motor valve.

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