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公开(公告)号：US20220402336A1
公开(公告)日：2022-12-22
申请号：US17894581
申请日：2022-08-24
Applicant: DENSO CORPORATION
Inventor： Kazuhiro TADA , Yuuichi KAMI , Zhaoliang XU , Atsushi INABA
IPC: B60H1/32
Abstract: A vehicle air conditioner includes a compressor, a heating unit, an outside air heat exchanger, a wind speed regulation unit, and a controller. The controller includes a melting control unit, a dry control unit, and a dry completion determination unit. In a dry defrosting mode, the melting control unit performs melting-defrosting to melt frost adhering to the outside air heat exchanger. The dry control unit performs a dry defrosting in which at least one of the amount of heat in a predetermined range or a wind speed regulated in a predetermined range by the wind speed regulation unit is supplied to residual water adhering to the outside air heat exchanger, due to melting of frost in the melting-defrosting, to dry the residual water. The dry completion determination unit determines whether drying of the residual water in the outside air heat exchanger is completed, in the dry defrosting.
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公开(公告)号：US20220402331A1
公开(公告)日：2022-12-22
申请号：US17894426
申请日：2022-08-24
Applicant: DENSO CORPORATION , DENSO AUTOMOTIVE Deutschland GmbH
Inventor： Kazuhiro TADA , Atsushi INABA , Zhaoliang XU , Patrick HORN , Shivakumar BANAKAR , Ariel MARASIGAN
IPC: B60H1/00 , B60L58/27 , H01M10/613 , H01M10/625 , H01M10/663 , H01M10/6568 , H01M10/63
Abstract: A vehicle air-conditioning device includes a compressor, a heating unit, an outside air heat exchanger, a wind speed regulation unit, and a controller. The heating unit includes a heating heat exchanger and heats ventilation air supplied to a space to be air conditioned using a high-pressure refrigerant as a heat source. The wind speed regulation unit regulates a wind speed of air supplied to the outside air heat exchanger. The control unit performs, as a defrosting operation of defrosting the outside air heat exchanger, a dry defrosting mode for evaporating and removing frost adhering to the outside air heat exchanger in a state where the outside air is at a low temperature. In the dry defrosting mode, the controller causes the wind speed regulation unit to supply air to the outside air heat exchanger at a wind speed in a range determined to promote evaporation and removal of frost.
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公开(公告)号：US20210190389A1
公开(公告)日：2021-06-24
申请号：US17191487
申请日：2021-03-03
Applicant: DENSO CORPORATION
Inventor： Kazuhiro TADA , Kengo SUGIMURA , Hiroyuki KOBAYASHI , Yuichi KAMI , Satoshi ITO
Abstract: The refrigeration cycle device includes a compressor, an outside heat exchanger, a cooling pressure reducing unit, an evaporator, a branch portion, a cool down pressure reducing unit, a temperature adjusting unit, a merging portion, a bypass passage, and a first on-off valve. The temperature adjusting unit includes a temperature adjusting heat exchange unit and adjusts a temperature of a temperature adjustment target object. During a cooling and cool down mode, the outside heat exchanger functions as a radiator, and the evaporator and the temperature adjusting heat exchange unit function as heat absorbers. During a target object warm up mode, the refrigerant discharged from the compressor is guided to the temperature adjusting heat exchange unit via the bypass passage, and the heat of the discharged refrigerant is used as a heat source for heating the temperature adjustment target object.
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公开(公告)号：US20220009312A1
公开(公告)日：2022-01-13
申请号：US17484372
申请日：2021-09-24
Applicant: DENSO CORPORATION
Inventor： Kazuhiro HAYASHI , Ryo MIYAHARA , Haruhisa SHIBATA , Yasutane HIJIKATA , Kazuhiro TADA
Abstract: A vibration-isolating device includes: a vibration source, which generates vibrations; and at least one vibration-isolating rubber which is fixed to the vibration source. The vibration source is supported by at least one support member that is fixed to a transmission-receiving member through the at least one vibration-isolating rubber. The vibration source and the at least one vibration-isolating rubber are configured such that a difference between a maximum value and a minimum value of resonant frequencies of a structure, which includes the vibration source, the at least one vibration-isolating rubber and the at least one support member, is equal to or smaller than 10 Hz when the vibration source is vibrated in six degrees of freedom. The at least one vibration-isolating rubber includes: 100 parts by mass of silicone rubber; and larger than 0 parts by mass and equal to or smaller than 3 parts by mass of carbon nanotubes.
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Patent Agency Ranking
公开(公告)号：US20190316822A1
公开(公告)日：2019-10-17
申请号：US16427672
申请日：2019-05-31
Applicant: DENSO CORPORATION
Inventor： Kazuhiro TADA , Kenichi MARUYAMA , Fujio NOMURA
Abstract: A refrigeration cycle apparatus includes: an electric compressor that compresses and discharges refrigerant; a heating heat exchanger that heats a fluid by high pressure refrigerant discharged from the electric compressor as a heat source; a decompressor that decompresses the refrigerant flowing from the heating heat exchanger; an evaporator that evaporates the refrigerant decompressed by the decompressor; and a rotational speed controller that controls a rotational speed of the electric compressor. The rotational speed controller is configured to reduce an upper limit value of the rotational speed of the electric compressor in accordance with an increase in a pressure ratio of a high-pressure side refrigerant pressure of refrigerant within a range from a discharge port of the compressor to an inlet side of the decompressor to a low-pressure side refrigerant pressure of refrigerant within a range from an outlet side of the decompressor to a suction port of the compressor.
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公开(公告)号：US20180156509A1
公开(公告)日：2018-06-07
申请号：US15823758
申请日：2017-11-28
Applicant: DENSO CORPORATION
Inventor： Kazuhiro TADA
CPC classification number: F25B47/02 , B60H1/00921 , B60H2001/00961 , F25B5/04 , F25B41/003 , F25B41/04 , F25B41/043 , F25B41/062 , F25B47/022 , F25B2341/0662 , F25B2347/02 , F25B2400/0409 , F25B2400/0411 , F25B2600/11 , F25B2600/2501 , F25B2600/2513 , F25B2700/1931 , F25B2700/1933 , F25B2700/2104 , F25B2700/2106 , F25B2700/21152 , F25B2700/2117
Abstract: A refrigerating cycle apparatus includes: a compressor that compresses and discharges refrigerant; a radiator that makes the refrigerant discharged out of the compressor to radiate heat; a pressure reducing device that decompresses the refrigerant flowing out of the radiator; an evaporator that evaporates the refrigerant decompressed by the pressure reducing device; and a decompression control part that controls operation of the pressure reducing device. The decompression control part controls the operation of the pressure reducing device in a manner that a physical quantity which has correlation with a pressure of the refrigerant in the evaporator approaches a predetermined defrosting standard value when a time-priority defrosting mode is set.
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公开(公告)号：US20230382195A1
公开(公告)日：2023-11-30
申请号：US18366866
申请日：2023-08-08
Applicant: DENSO CORPORATION
Inventor： Atsushi YAMADA , Kazuhiro TADA , Masaki HARADA
CPC classification number: B60H1/3205 , B60H1/00571
Abstract: An air conditioner includes: a heat pump cycle including a compressor, a heating part and a low-temperature side water-refrigerant heat exchanger; a heat medium circuit; and a blower. In the air conditioner, when a heating capability of the heating part is increased by using the heat generated by the heat generating part, a heating preparation control is executed, in which a refrigerant discharge capability of the compressor is set to be equal to or less than a predetermined reference discharge capability and a blowing capability of the blower is set to be equal to or less than a predetermined reference blowing capability, until an inlet-side heat medium temperature of the heat medium flowing into the heat medium passage of the low-temperature side water-refrigerant heat exchanger becomes equal to or higher than a target heat medium temperature.
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公开(公告)号：US20190128569A1
公开(公告)日：2019-05-02
申请号：US16225444
申请日：2018-12-19
Applicant: DENSO CORPORATION
Inventor： Kazuhiro TADA , Hiroya HASEGAWA , Satoshi ITO , Mikiharu KUWAHARA
Abstract: An ejector refrigeration circuit includes a compressor, a heating heat exchanger, a first decompressor, an exterior heat exchanger, a second decompressor, a cooling heat exchanger, a heating ejector, a heating-side gas-liquid separator, and a refrigerant circuit switch. The refrigerant circuit switch switches between a refrigerant circuit in a first dehumidifying-heating mode and a refrigerant circuit in a second dehumidifying-heating mode. A flow direction of the refrigerant through the exterior heat exchanger in the first dehumidifying-heating mode is the same as a flow direction of the refrigerant through the exterior heat exchanger in the second dehumidifying-heating mode. The flow direction of the refrigerant through the exterior heat exchanger in the first dehumidifying-heating mode is different from a flow direction of the refrigerant through the exterior heat exchanger in the heating mode.
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公开(公告)号：US20190030992A1
公开(公告)日：2019-01-31
申请号：US16071917
申请日：2017-01-20
Applicant: DENSO CORPORATION
Inventor： Kazuhiro TADA
Abstract: A heat pump system includes a heat pump cycle, a heat medium circulation circuit, and a refrigeration cycle device. The refrigeration cycle device is configured to perform a defrosting operation when a frost formation determiner determines that frost is formed. A throttle opening degree controller is configured to increase an opening degree in the defrosting operation. A pumping capacity controller is configured to increase a pumping capacity in the defrosting operation with increase of a required heating capacity required for heating a heating target fluid, the pumping capacity controller increasing the pumping capacity such that heat of refrigerant discharged from a compressor is transferred to heat medium in a first heat exchanger within a range in which a temperature of the refrigerant flowing into an outside heat exchanger is capable of melting the frost formed on the outside heat exchanger.
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