Patents by Inventor Daisuke Hisajima
Daisuke Hisajima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10554065Abstract: A battery control apparatus includes a reduced electricity cost analysis unit that obtains a discharge electric power cost at a discharge time and a charge electric power cost at a charge time of a battery, based on a basic cost and a unit cost of an electricity bill, and obtains a reduced electricity cost in which the charge electric power cost is subtracted from the discharge electric power cost for every discharge depth of the battery; an introduction cost analysis unit that calculates an introduction cost of the battery for every discharge depth of the battery; and a charge and discharge depth optimization unit that obtains a difference of the reduced electricity cost and the introduction cost for every discharge depth of the battery, and determines a charge and discharge depth of the battery based on the difference. The discharge of the battery is performed at the determined charge and discharge depth.Type: GrantFiled: September 10, 2014Date of Patent: February 4, 2020Assignee: Hitachi, Ltd.Inventors: Noriyuki Miyake, Yasushi Tomita, Tsutomu Kawamura, Hirotaka Takahashi, Kenichi Kuwabara, Daisuke Hisajima, Junichi Yamada
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Publication number: 20170005483Abstract: A battery control apparatus includes a reduced electricity cost analysis unit that obtains a discharge electric power cost at a discharge time and a charge electric power cost at a charge time of a battery, based on a basic cost and a unit cost of an electricity bill, and obtains a reduced electricity cost in which the charge electric power cost is subtracted from the discharge electric power cost for every discharge depth of the battery; an introduction cost analysis unit that calculates an introduction cost of the battery for every discharge depth of the battery; and a charge and discharge depth optimization unit that obtains a difference of the reduced electricity cost and the introduction cost for every discharge depth of the battery, and determines a charge and discharge depth of the battery based. on the difference. The discharge of the battery is performed at the determined charge and discharge depth.Type: ApplicationFiled: September 10, 2014Publication date: January 5, 2017Inventors: Noriyuki MIYAKE, Yasushi TOMITA, Tsutomu KAWAMURA, Hirotaka TAKAHASHI, Kenichi KUWABARA, Daisuke HISAJIMA, Junichi YAMADA
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Publication number: 20130345998Abstract: An energy management system has a configuration including: an air-conditioning schedule energy-saving rate calculating unit which, based on an air-conditioning schedule for the reference time and an air-conditioning schedule that has an energy-saving control content, calculates a relative amount of energy consumed for air-conditioning for each schedule and calculates an effect of energy-saving control; and an amount of consumption converting unit which calculates an amount of energy consumed for air-conditioning that is expected at the reference time, based on an energy-saving rate obtained by the air-conditioning schedule energy-saving rate calculating unit and an amount of energy consumed for air-conditioning when energy-saving control is implemented.Type: ApplicationFiled: June 12, 2013Publication date: December 26, 2013Inventors: Masahiro MATSUBARA, Kenichi KUWABARA, Daisuke HISAJIMA, Junichi YAMADA, Yasushi TOMITA
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Patent number: 5577555Abstract: Heat exchanger has a first surface on which a first fluid flows and a second surface on which a second fluid flows, at least one of the first and second surfaces has at least two projections and a bottom therebetween, and an imaginary line on the bottom along a shortest distance between the projections adjacent to each other is prevented from extending along an imaginary face substantially parallel to a main flow direction of one of the first and second fluids which flows over the bottom.Type: GrantFiled: February 4, 1994Date of Patent: November 26, 1996Assignees: Hitachi, Ltd., Hitachi Cable, Ltd.Inventors: Daisuke Hisajima, Akira Nishiguchi, Tomihisa Ohuchi, Saburo Tsukada
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Patent number: 5517830Abstract: The capacity control range of an interior unit of a multiple type absorption air conditioning system is increased, and turning on and off of cooling/heating and switch over between the cooling and heating can be readily and safely performed. The capacity control range is increased by reserving a liquid refrigerant in an absorption cool/warm water unit. An interior unit is connected to the absorption cool/warm water unit by a communication device. The operation of the cool/warm water unit caused by turning on and off the system and switch over between cooling and heating are automatically controlled by an operation control device. Consequently, the operation is simplified, and safety is improved.Type: GrantFiled: January 26, 1995Date of Patent: May 21, 1996Assignee: Hitachi, Ltd.Inventors: Tomihisa Ohuchi, Akira Nishiguchi, Seiichiro Sakaguchi, Daisuke Hisajima, Michihiko Aizawa, Takashi Nakao, Yasuo Koseki, Kyoji Kohno
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Patent number: 5447042Abstract: The capacity control range of an interior unit of a multiple type absorption air conditioning system is enlarged, and turning on and off of cooling/heating and switch over between the cooling and heating can be readily and safely performed. The capacity control range is increased by reserving a liquid refrigerant in an absorption cool/warm water unit. An interior unit is connected to the absorption cool/warm water unit by a communication device. The operation of the cool/warm water unit caused by turning on and off the system and switch over between cooling and heating are automatically controlled by an operation control device. Consequently, the operation is simplified, and safety is improved.Type: GrantFiled: February 1, 1994Date of Patent: September 5, 1995Assignee: Hitachi, Ltd.Inventors: Tomihisa Ohuchi, Akira Nishiguchi, Seiichiro Sakaguchi, Daisuke Hisajima, Michihiko Aizawa, Takashi Nakao, Yasuo Koseki, Kyoji Kohno
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Patent number: 5289868Abstract: An unit-type air conditioning system is provided to enable low-load operation of an absorption chiller heater, to thereby improve the load responsiveness, and to use such a chiller heater as an outdoor unit. A plurality of burners are provided in a high temperature generator of the absorption chiller heater, thereby enabling the low-load operation. A refrigerant return valve is provided so as to speed up the stop operation. Flow rates of pumps are controlled in accordance with detected values of temperatures in the chiller heater and a load change, thus improving the load responsiveness. Further, in the air conditioning system with this chiller heater serving as an outdoor unit, required operation prediction is performed on the basis of outer signals from load units and the like, and prediction control according to its result is conducted, further improving the load responsiveness.Type: GrantFiled: April 10, 1992Date of Patent: March 1, 1994Assignee: Hitachi, Ltd.Inventors: Yasuo Koseki, Ryuichi Kaji, Hiroaki Yoda, Takashi Nakao, Tomihisa Ohuchi, Akira Nishiguchi, Daisuke Hisajima, Katsuya Ebara
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Patent number: 5282369Abstract: The capacity control range of an interior unit of a multiple type absorption air conditioning system is increased, and turning on and off of cooling/heating and switch over between the cooling and heating can be readily and safely performed. The capacity control range is increased by reserving a liquid refrigerant in an absorption cool/warm water unit. An interior unit is connected to the absorption cool/warm water unit by a communication device. The operation of the cool/warm water unit caused by turning on and off the system and switch over between cooling and heating are automatically controlled by an operation control device. Consequently, the operation is simplified, and safety is improved.Type: GrantFiled: March 30, 1992Date of Patent: February 1, 1994Assignee: Hitachi, Ltd.Inventors: Tomihisa Ohuchi, Akira Nishiguchi, Seiichiro Sakaguchi, Daisuke Hisajima, Michihiko Aizawa, Takashi Nakao, Yasuo Koseki, Kyoji Kohno
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Patent number: 5275010Abstract: An individual air conditioning system with an absorption chiller heater having a controllable capacity, with thermal input to a burner of a high temperature regenerator being controlled by on-off control or the like even if the load is low. The temperature of cooling water is controlled in accordance with a concentration of refrigerant in an absorber, so that the refrigerating capacity of the absorption chiller heater can be freely varied from 0% to 100% without the refrigerant being frozen.Type: GrantFiled: August 21, 1992Date of Patent: January 4, 1994Assignee: Hitachi, Ltd.Inventors: Daisuke Hisajima, Tomihisa Ohuchi, Akira Nishiguchi, Yasuo Koseki, Michihiko Aizawa, Hiroaki Yoda, Takashi Nakao
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Patent number: 5259202Abstract: In an absorption air-conditioning system, in order to immediately stop indoor air-conditions by a stop signal of the indoor air-conditioners and improve characteristics for activating the system , such as, by effecting re-activation at a relatively short time interval after stopping the operation of the system, when the last one of the operating indoor air-conditioners is stopped, a stop signal is sent to a control device from a controller for the indoor air-conditioner, and in response to this signal, the control device effects the control of stopping a burner, a cooling medium circulating pump, a cooling water pump and a cold/hot water, pump. A solution circulating pump, however, continues operating and the solution, while kept at a high concentration, is circulated through an absorber, a high-temperature regenerator and a low-temperature regenerator.Type: GrantFiled: January 29, 1992Date of Patent: November 9, 1993Assignee: Hitachi, Ltd.Inventors: Akira Nishiguchi, Tomihisa Ohuchi, Daisuke Hisajima, Michihiko Aizawa
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Patent number: 5218844Abstract: An absorption heat pump apparatus is so formed that solution which has absorbed coolant vapor in absorber to increase in temperature, liquid coolant into which coolant vapor heat been condensed in a condenser, and coolant which has decreased in temperature through flash evaporation of coolant vapor in an evaporator are delivered directly to heat exchangers so as to exchange heat with the outdoor air, respectively. This arrangement makes the use of cold water and cooling water as well as equipment therefor and maintenance thereof unnecessary.Type: GrantFiled: February 11, 1991Date of Patent: June 15, 1993Assignee: Hitachi, Ltd.Inventors: Akira Nishiguchi, Tomihisa Ohuchi, Seiichiro Sakaguchi, Daisuke Hisajima, Michihiko Aizawa
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Patent number: 5205137Abstract: An absorption air conditioner having a regenerating chamber for heating and condensing a portion of a dilute solution generated in an absorber and an absorption chamber for causing refrigerant vapor generated in the regenerating chamber to be absorbed into said dilute solution which is at an intermediate position in the passage connected from the absorber to the regenerator so that the size of the absorber is reduced and the overall size of the absorption air conditioner is reduced.Type: GrantFiled: September 5, 1991Date of Patent: April 27, 1993Assignee: Hitachi, Ltd.Inventors: Tomihisa Ohuchi, Akira Nishiguchi, Daisuke Hisajima, Seiichiro Sakaguchi, Yoshifumi Kunugi, Michihiko Aizawa, Katsuya Ebara, Hiroaki Yoda
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Patent number: 5156203Abstract: The present invention relates to air conditioning systems and more particularly to an air conditioning system which provides air conditioning in each of a plurality of spaces. The air conditioning system according to the present invention divides a space with partitions into a plurality of air conditioning spaces and controls the temperature by cooling and heating mediums supplied from an external heat source using a three-way valve and an expansion valve. The air conditioning system includes an ID card for identifying a person which uses the air conditioning system. If a person is present to use the air conditioning system, the set or measured values of the environmental conditions for that person is stored. When that person again uses the air conditioning system, the system calculates the environmental conditions stored by the person in accordance with his stored set or measured environmental condition values.Type: GrantFiled: April 15, 1991Date of Patent: October 20, 1992Assignee: Hitachi, Ltd.Inventors: Sunao Funakoshi, Kazuya Matsuo, Hiroo Nakamura, Hiroaki Matsushima, Daisuke Hisajima, Akira Nishiguchi, Takatoshi Yamamoto, Tomomi Umeda, Katsuhiko Hashimoto
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Patent number: 5048308Abstract: An absorber comprises a vapor absorption portion including at least two flow paths through which an absorption solution flows down and absorbs a cooling medium vapor, at least two solution cooling portions separated from, and juxtaposed with, the vapor absorption portion and solution circulation for circulating a cooling medium vapor between the solution cooling portion and the vapor absorption portion. In this manner, a refrigerator can be made compact in size and cycle efficiency can be improved.Type: GrantFiled: June 15, 1990Date of Patent: September 17, 1991Assignee: Hitachi, Ltd.Inventors: Daisuke Hisajima, Tomihisa Ohuchi, Seiichiro Sakaguchi, Toshifumi Kunugi, Michihiko Aizawa