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公开(公告)号：US12130054B2
公开(公告)日：2024-10-29
申请号：US17607379
申请日：2019-06-25
CPC分类号： F25B13/00 , F25B25/005 , F25B1/00 , F25B2313/003 , F25B2313/006 , F25B2313/0231 , F25B2313/0233
摘要： An air-conditioning apparatus includes an outdoor unit and a relay unit. The outdoor unit includes a compressor compressing and discharging refrigerant and a heat-source-side heat exchanger performing heat exchange between the refrigerant and outside air. The relay unit and the outdoor unit forms a refrigerant circuit. The outdoor unit includes first and flow switching devices each switching an associated flow passage for the refrigerant between a plurality of flow passages, according to an operation mode. An outflow pipe and an inflow pipe through which refrigerant flows from the outdoor unit to the relay unit and from the relay unit into the outdoor unit, respectively, are between the outdoor unit and the relay unit. The first flow switching device is connected to the compressor, the second flow switching device, and the outflow pipe. The second flow switching device is connected to the first flow switching device and the inflow pipe.
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公开(公告)号：US10082323B2
公开(公告)日：2018-09-25
申请号：US15025237
申请日：2014-09-22
发明人： Dong Seok Bae , Hyung Mo Koo , Jin Young Ahn , Hyun Jin Yoon , Il Yong Cho , Young Jun Choi
CPC分类号： F25B41/04 , F24F1/32 , F25B13/00 , F25B41/003 , F25B49/02 , F25B2313/0231 , F25B2313/0252 , F25B2313/02741 , F25B2400/06 , F25B2400/075 , F25B2400/13 , F25B2600/2501
摘要： An air conditioner of the present invention includes: an outdoor unit having an outdoor heat exchanger and a compressor installed therein; a plurality of indoor units connected to the outdoor unit and having an indoor heat exchanger installed therein; a four-way valve provided on a discharge part side of the compressor; a refrigerant tube having first to third refrigerant tubes and connecting the four-way valve and the indoor heat exchanger, in which the first refrigerant tube is branched from between the four-way valve and the outdoor heat exchanger such that some of a refrigerant discharged from the compressor is fed into the indoor heat exchanger while bypassing the outdoor heat exchanger, the second refrigerant tube is connected to the four-way valve to feed all of the refrigerant discharged from the compressor into the indoor heat exchanger, and the third refrigerant tube is connected to the second refrigerant tube in parallel; and a heat pump valve provided at the third refrigerant tube to selectively close the third refrigerant tube. The air conditioner includes an outdoor unit that can be applied to simultaneous cooling and heating concurrent type air conditioners and cooling and heating switching type air conditioners through the opening and closing of the heat pump valve.
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公开(公告)号：US10054337B2
公开(公告)日：2018-08-21
申请号：US14443473
申请日：2013-12-02
发明人： Koji Yamashita
CPC分类号： F25B7/00 , F25B13/00 , F25B25/005 , F25B49/02 , F25B2313/023 , F25B2313/0231 , F25B2313/0311 , F25B2313/0314 , F25B2313/0315 , F25B2600/13 , F25B2700/1931 , F25B2700/1933 , F25B2700/21151
摘要： An air-conditioning apparatus is capable of cooling a first heat medium and heating the first heat medium at the same time in a relay unit, and the cooled first heat medium and the heated first heat medium can be separately distributed to a plurality of indoor units. Waste heat of a first refrigerant circuit can be discharged to an outdoor space via a second heat medium and the second refrigerant.
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公开(公告)号：US09958170B2
公开(公告)日：2018-05-01
申请号：US13499878
申请日：2009-10-22
申请人： Koji Yamashita , Hiroyuki Morimoto , Yuji Motomura
发明人： Koji Yamashita , Hiroyuki Morimoto , Yuji Motomura
IPC分类号： F25B7/00 , F25B1/00 , F25B49/00 , F25B1/10 , F25B39/04 , F24F3/06 , F25B25/00 , F25B13/00 , F25B45/00
CPC分类号： F24F3/06 , F24F3/065 , F24F11/83 , F25B7/00 , F25B13/00 , F25B25/005 , F25B45/00 , F25B2313/006 , F25B2313/0231 , F25B2313/02732 , F25B2313/02741 , F25B2500/07 , F25B2600/027 , F25B2600/0271 , F25B2600/0272
摘要： An air-conditioning apparatus includes indoor units including a plurality of use side heat exchangers that exchange heat between air and a heat medium, and a heat medium relay unit having a plurality of heat exchangers related to heat medium. A plurality of pumps deliver the heat medium involved in heating or cooling performed by the plurality of heat exchangers related to heat medium to each passage and circulate the heat medium. A plurality of heat medium flow switching devices perform switching so that the heat medium from a selected passage flows into and flows out of each use side heat exchanger. An expansion tank is connected to a passage alleviates a pressure change caused by a volumetric change of the heat medium, and a pressure equalizing pipe connects each inlet passage or each outlet passage of the heat medium sending devices.
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公开(公告)号：US09933205B2
公开(公告)日：2018-04-03
申请号：US14111795
申请日：2011-05-23
CPC分类号： F25D29/006 , F24F3/065 , F24F11/32 , F24F11/36 , F25B9/006 , F25B13/00 , F25B49/005 , F25B2313/006 , F25B2313/0231 , F25B2313/0233 , F25B2313/02741 , F25B2500/22
摘要： An outdoor unit is configured to include a compressor and a heat source side heat exchanger. Indoor units are configured to include first expansion devices and use side heat exchangers, and air-condition an air-conditioned space. Branching devices, connected by pipes to the outdoor unit by a plurality of main pipes and connected by pipes to each indoor unit by a plurality of branch pipes, are configured to branch a refrigerant from a side of the main pipes and circulate the refrigerant to the branch pipes, and converge the refrigerant from a side of the branch pipes and circulate the refrigerant to the main pipes. A refrigerant concentration detecting device is installed in a non-air-conditioned space. A shutoff valve control device is configured, upon determining that the refrigerant has leaked, to control shutoff devices and to shut off the refrigerant flows.
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公开(公告)号：US09890976B2
公开(公告)日：2018-02-13
申请号：US14415484
申请日：2012-08-08
CPC分类号： F25B30/02 , F24F3/065 , F25B13/00 , F25B41/046 , F25B49/02 , F25B2313/003 , F25B2313/006 , F25B2313/0231 , F25B2313/0233 , F25B2313/0234 , F25B2313/0272 , F25B2313/02741
摘要： An air-conditioning apparatus includes an outdoor unit including a compressor configured to compress a first-side refrigerant and a heat-source-side heat exchanger configured to cause heat exchange between air and the first-side refrigerant, plural indoor units including indoor heat exchangers configured to cause heat exchange between the air and a second-side refrigerant, plural intermediate heat exchangers configured to cause heat exchange between the first-side and second-side refrigerants and connected to the outdoor unit by a first-side refrigerant pipe and connected to the indoor units by a second-side refrigerant pipe, and a flow switching device configured to switch combination of connection between the indoor units and the intermediate heat exchangers. The indoor units include convective indoor units and radiant indoor units, the convective indoor units include a convective indoor heat exchanger, and the radiant indoor units include a radiant indoor heat exchanger.
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公开(公告)号：US20180017293A1
公开(公告)日：2018-01-18
申请号：US15618321
申请日：2017-06-09
发明人： Koji NAITO , Naoyuki FUSHIMI , Kazumoto URATA , Gen YASUDA , Kazunori FUKUDA
CPC分类号： F25B13/00 , F24F1/32 , F24F11/36 , F24F2221/54 , F25B49/02 , F25B2313/007 , F25B2313/0231 , F25B2313/0233 , F25B2313/02732 , F25B2313/02742 , F25B2500/222
摘要： A cooling/heating switching unit is provided that is capable of simply and reliably detecting leak of refrigerant. The switching unit includes: first and second fittings having a high/low-pressure-gas main pipe and a low-pressure-gas main pipe connected thereto, respectively, wherein the main pipes are linked to an outdoor unit; a third fitting having an indoor-unit connection pipe connected thereto, wherein the connection pipe is linked to indoor units; an expansion valve for high/low-pressure-gas pipe, an expansion valve for low-pressure-gas pipe, and expansion-valve driving sections that selectively connect the first or second fitting with the third fitting via a refrigerant pipe to control a flow direction of refrigerant; a housing that houses the refrigerant pipe; a heat insulating material that fills inside of the housing to insulate the refrigerant pipe arranged inside of the housing from heat; and a refrigerant leak detection sensor installed outside of the housing to detect leaked refrigerant.
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公开(公告)号：US09851132B2
公开(公告)日：2017-12-26
申请号：US14649098
申请日：2013-11-29
发明人： Satoshi Kawano , Shinya Matsuoka , Masahiro Oka , Mari Susaki
CPC分类号： F25B41/04 , F24F3/08 , F25B13/00 , F25B2313/0231 , F25B2313/0233 , F25B2313/0272 , F25B2313/02731 , F25B2313/02791 , F25B2400/23 , F25B2500/01
摘要： This air conditioner performs a cooling operation and a heating operation in parallel with each other with an outdoor unit and indoor units connected together through two communication pipes. The air conditioner includes a switching mechanism changing the directions of refrigerants flowing through the communication pipes depending on whether a heating dominant operation is being performed in a first load region where a cooling load is relatively light or a second load region where the cooling load is heavier than in the first load region. In the second load region, the switching mechanism allows a low-pressure refrigerant to flow from the indoor units to the outdoor unit through the second communication pipe thicker than the first communication pipe to reduce a performance deterioration due to the pressure loss involved with the heating dominant operation.
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公开(公告)号：US09816736B2
公开(公告)日：2017-11-14
申请号：US14349757
申请日：2012-01-24
申请人： Koji Yamashita
发明人： Koji Yamashita
CPC分类号： F25B29/003 , F25B7/00 , F25B9/006 , F25B13/00 , F25B25/005 , F25B2313/003 , F25B2313/0231 , F25B2600/2513
摘要： When a first temperature difference is the difference between an inlet temperature of a first refrigerant and an outlet temperature of the first refrigerant in the heat exchanger for heating, and a second temperature difference is the difference between an inlet temperature of a second refrigerant and an outlet temperature of the second refrigerant in the heat exchanger for heating, the difference between the first temperature difference and the second temperature difference is held in a predetermined value or less by controlling the opening degree of a second expansion device.
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公开(公告)号：US09797618B2
公开(公告)日：2017-10-24
申请号：US14625209
申请日：2015-02-18
CPC分类号： F24F11/008 , F24F3/06 , F24F11/30 , F24F11/41 , F24F11/83 , F24F2110/10 , F24F2110/12 , F24F2140/20 , F25B13/00 , F25B25/005 , F25B47/006 , F25B2313/006 , F25B2313/0231 , F25B2313/0232 , F25B2313/0233 , F25B2313/0272 , F25B2313/02741 , F25B2313/0314 , F25D17/02
摘要： In an air-conditioning apparatus, a heat source side heat exchanger, intermediate heat exchangers, and use side heat exchangers are formed in separate bodies respectively and adapted to be disposed at separate locations one another. In a heat medium circulation circuit where the intermediate heat exchanger and the use side heat exchanger are connected, temperature sensors are installed. An anti-freezing operation mode is provided in which, when the detection temperatures of the temperature sensors become equal to or lower than a set temperature Ts while a compressor or pumps are stopped, the heat medium is circulated to perform anti-freezing of the heat medium.
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