Patents by Inventor Kazuaki Isono
Kazuaki Isono 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: 5970727Abstract: A refrigerating cycle apparatus including an inverter driven compressor with controllable speed of rotation, a four-way valve, an indoor heat exchanger, a pressure reducing device, outdoor heat exchanger, a defrosting condition detector for detecting a frosting state of the outdoor heat exchanger in a heating operation, a defrosting operation controller for carrying out a defrosting operation based on a detection signal from the defrosting condition detector and having a minimum operable frequency controller for controlling a minimum operable frequency for the compressor on restarting after completion of the defrosting operation and/or a starting speed controller for controlling a starting speed for the compressor based on a detection signal from the defrosting condition detector on restarting after completion of the defrosting operation in order to provide proper lubrication after a defrost operation.Type: GrantFiled: August 20, 1998Date of Patent: October 26, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hajime Hiraoka, Yoshihiro Tanabe, Hiroaki Makino, Hidenori Ishioka, Yasuo Imaki, Kazuaki Isono, Tadashi Saito
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Patent number: 5263335Abstract: An operation controller for an air conditioner designed to decrease a difference between an ambient temperature and a set temperature by varying the number of revolutions of a compressor, includes: a means for calculating an operation ratio of the compressor; and a means for determining the range of varying an operation frequency of the compressor in accordance with the operation ratio.Type: GrantFiled: July 10, 1992Date of Patent: November 23, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuaki Isono, Toshihiro Tanaka, Seiji Kubo, Hidenori Ishioka, Hideaki Nagatomo, Katsuyuki Aoki, Yasuo Imaki, Tomofumi Tezuka, Isao Funayama
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Patent number: 5259214Abstract: An air conditioning system comprising: a refrigeration cycle including a compressor, a reversing valve, a condenser, a pressure reducing device and an evaporator; a thermal storage heat exchanger which is arranged at a lower portion in a thermal storage tank with a thermal storage material filled therein, and whose refrigerant inlet side is smaller than its refrigerant outlet side in terms of heat exchange capability; and a thermal absorption heat exchanger which is arranged at an upper portion in the thermal storage tank in a way to be reverse to the flow direction of a refrigerant in the thermal storage heat exchanger.Type: GrantFiled: December 11, 1992Date of Patent: November 9, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideaki Nagatomo, Katsuyuki Aoki, Toshihiro Tanaka, Kazuaki Isono, Yasuo Imaki, Seiji Kubo, Hidenori Ishioka
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Patent number: 5176568Abstract: There are provided a plurality of groups 14 and 34 which are arranged in an outlet of a main body, and which comprise blowing direction deflecting plates 1, 2 and 3, and 21, 22 and 23; rotational angle setting means 41a and 41b which are provided for the respective groups 14 and 34, and which set rotation angles of the groups 14 and 34; rotational angle limit detection means 42a and 42b for comparing preset limiting rotation angles of the groups 14 and 34 to the set rotation angles; and rotational direction reversing means 43 for reversing the rotational directions of the groups 14 and 34 when at least one of the groups 14 and 34 has reached the limiting rotation angle. Blowing direction of conditioned air can be adjusted while constantly keeping an arbitrary phase difference in blowing direction between the groups.Type: GrantFiled: March 20, 1992Date of Patent: January 5, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideaki Nagatomo, Kazuaki Isono, Toshihiro Tanaka, Hidenori Ishioka, Katsuyuki Aoki, Seiji Kubo, Yasuo Imaki, Isao Funayama
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Patent number: 5165250Abstract: An air conditioning system comprising a refrigerant circuit. A thermal storage device is arranged in the refrigerant circuit and can store heat and utilize the stored heat to increase heating capacity at the time of kickoff of heating. A temperature detector detects a temperature at a thermal storage portion of a thermal storage and radiating heat exchanger which is housed in the thermal storage device. A counter counts a thermal storage operation period required for the temperature detected at the thermal storage portion to achieve a predetermined value, outputs a signal indicative of stopping a thermal storage operation when the detected temperature has achieved the predetermined value, counts the lapse of a predetermined thermal storage operation stoppage period after stop of the thermal storage operation, and outputs a signal indicative of starting the thermal storage operation when a predetermined thermal storage operation stoppage time has passed.Type: GrantFiled: March 29, 1991Date of Patent: November 24, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideaki Nagatomo, Seiji Kubo, Kazuaki Isono, Hidenori Ishioka, Katsuyuki Aoki, Toshihiro Tanaka, Yasuo Imaki, Tomofumi Tezuka, Yoshiaki Tanimura
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Patent number: 5072878Abstract: An air conditioning apparatus comprises a plurality of outlet ports, a blowing fan for blowing off an conditioned air from the outlet ports to the outside of the main body of the apparatus, an air directing plate arranged in at least one of the outlet ports to enable the direction of the conditioned air to change, an operation state detecting device for detecting the operation state of the main body, and a driving device for adjusting the position of the air directing plate, depending on signals from the operation state detecting device.Type: GrantFiled: March 23, 1990Date of Patent: December 17, 1991Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Katsuyuki Aoki, Hideaki Nagatomo, Seiji Kubo, Hiroyuki Umemura, Toshihiro Tanaka, Kazuaki Isono, Hidenori Ishioka
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Patent number: 5046549Abstract: A separate air conditioner includes a heat exchanger, an upper fan, a lower fan, the first air flow control for controlling the upper and lower fans in an initial heating period such that the ratio of an upper air flow from the upper fan to a total air flow from both the upper and lower fans decreases as the total air flow increases; and the second air flow control for controlling the upper and lower fans in a stable heating state such that the ratio increases as the total air flow increases. The first air flow control controls the upper and lower fans in a cooling operation such that the upper air flow is inversely proportional to the total air flow, while the second air flow control controls the upper and lower fans in a heating operation such that the upper air flow is proportional to the total air flow.Type: GrantFiled: June 30, 1988Date of Patent: September 10, 1991Assignee: Mitsubishi Denki K.K.Inventor: Kazuaki Isono
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Patent number: 4891953Abstract: A control device for an air conditioner including a compressor driven by an inverter is disclosed. The control device comprises a floor temperature sensor as well as a room temperature sensor for detecting representative room temperature. A standard operation frequency of the compressor is determined on the basis of the difference between the target temperature and the representative room temperature detected by the room temperature sensor. Adjustment is made to the standard operation frequency according to the difference between the temperatures detected by the two temperature sensors, thereby obtaining an operation frequency of the compressor.Type: GrantFiled: February 1, 1989Date of Patent: January 9, 1990Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Kazuaki Isono
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Patent number: 4795089Abstract: A room air conditioner is equipped with an input switch mechanism for indicating room condition. The switch mechanism includes a first switch which a user presses when he feels hot and a second switch which the user presses when he feels cold. A microcomputer controls the operation of the air conditioner in response to signals from the input switch mechanism. When the user presses the first or second switch, the microcomputer automatically changes the set temperature and the temperature of air which is circulated in the room being air conditioned to correct the hot or cold room condition felt by the user to relieve the user's sense of discomfort. The circulated air temperature can be changed by changing the rotational speed of indoor blowers or the compressor, by changing the degree of opening of an electronic expansion valve disposed to provide heat exchange, or by changing the orientation of adjustable louvers such that the air circulates directly from an air outlet to an intake port of the air conditioner.Type: GrantFiled: May 20, 1987Date of Patent: January 3, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomofumi Tezuka, Kazuaki Isono
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Patent number: 4715191Abstract: An air conditioning method with use of an air conditioner comprises a step of determining whether or not an input signal is produced from a plurality of switches for providing conditions, a step of determining an established temperature on the basis of the signal from the switches, a step of comparing data provided by the established temperature determining step with the room temperature detected by the temperature detector to produce a signal, and a step of controlling the compressor based on the signal as a result of the comparison.Type: GrantFiled: October 14, 1986Date of Patent: December 29, 1987Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroyuki Umemura, Kenji Matsuda, Tomofumi Tezuda, Kazuaki Isono, Hidenori Ishioka, Sakuo Sugawara, Masanori Hara
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Patent number: 4709554Abstract: An air conditioning apparatus comprises a refrigerant circuit in which a compressor, a four-way valve, a room side heat exchanger, a pressure-reducing device and an outdoor side heat exchanger are connected in this order, wherein there is provided with a refrigerant temperature detector provided at a pipe line near the outdoor side heat exchanger, a room temperature detector for detecting temperature of a room and a controlling device which is electrically connected to the refrigerant temperature detector and the room temperature detector, said controlling device controlling operations for room-warming and defrosting based on inputs from the detectors.Type: GrantFiled: August 21, 1986Date of Patent: December 1, 1987Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroyuki Umemura, Kenji Matsuda, Tomofumi Tezuka, Kazuaki Isono, Hidenori Ishioka, Fumio Matsuoka, Hitoshi Iijima