Patents by Inventor Shigeharu Taira
Shigeharu Taira 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).
-
Publication number: 20040065807Abstract: A photoelectric conversion device capable of improving an open-circuit voltage is obtained. In this photoelectric conversion device, many of crystal grains contained in a third non-single-crystalline semiconductor layer have major axes substantially perpendicular to a main surface of a substrate on an interfacial portion between at least either a first non-single-crystalline semiconductor layer or a second non-single-crystalline semiconductor layer and the third non-single-crystalline semiconductor layer, and many of crystal grains contained in either semiconductor layer have major axes substantially parallel to the main surface of the substrate on the aforementioned interfacial portion.Type: ApplicationFiled: September 17, 2003Publication date: April 8, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masaki Shima, Shigeharu Taira
-
Patent number: 6701744Abstract: Formed in a valve main body (1) is a refrigerant flow path (41) for lowering the amount of flow of a refrigerant which flows into an internal space (30) of a casing (3) from a refrigerant flow path (9) through a needle fit/insert clearance (17) defined between a needle fit/insert aperture (16) and a needle (2) inserted into the needle fit/insert aperture (16). When, with the rise or drop in refrigerant pressure, refrigerant flows through the needle fit/insert clearance (17), adhesion of sludge included in the refrigerant to the wall surface of the needle fit/insert clearance (17) is reduced by a lessened amount of refrigerant flow in the needle fit/insert clearance (17) by the refrigerant flow path (41). This therefore prevents, as far as possible, malfunction of the needle (2) due to sludge adhesion, thereby ensuring proper operation of the needle (2).Type: GrantFiled: November 9, 2001Date of Patent: March 9, 2004Assignee: Daikin Industries, Ltd.Inventors: Ryuzaburo Yajima, Nobuo Domyo, Hajime Esumi, Shigeharu Taira
-
Publication number: 20040011062Abstract: A multi-type refrigerator is capable of achieving a high coefficient of performance (COP) while using R32 as refrigerant and that takes account of energy saving and global warming. Refrigerating cycles are executed by circulation of R32 as refrigerant through a refrigerant circuit including one outdoor unit having a compressor, a condenser, and expansion means and a plurality of indoor units having evaporators. A filling quantity of R32 for the refrigerant circuit is set in a range from 120 to 300 g/kW (refrigerating capacity). The filling quantity of R32 for the refrigerant circuit is set in a range from 84 to 300 g/L (internal volume of the condenser).Type: ApplicationFiled: March 10, 2003Publication date: January 22, 2004Inventor: Shigeharu Taira
-
Patent number: 6672100Abstract: In this porous part producing method, a head part (11A, 11B) in the interior of a compressor, which is a sintered part, is subjected at least to vacuum substitution or heat blow cleaning, whereby after oils causing contamination and/sludge, such as rust-preventive oil, in the head part (11A, 11B) in the interior of the compressor is discharged therefrom, the head part (11A, 11B) is immersed in alkyl benzene type oil serving as refrigerator oil. Thereby, deterioration-inducing substances in the head part (11A, 11B) in the interior of the compressor is replaced with the refrigerator oil; thus, it is possible to produce a porous part which will not bring about contamination and/or sludge even if used as a component for refrigerators for a long time.Type: GrantFiled: June 7, 2002Date of Patent: January 6, 2004Assignee: Daikin Industries, Ltd.Inventors: Shigeharu Taira, Atsushi Endou
-
Patent number: 6644047Abstract: An air conditioner employing a flammable refrigerant, comprises a sensor (11) that is provided on an external surface of an indoor unit (1) and detects the flammable refrigerant gas, in order to prevent the accident of a fire or the like even when the flammable refrigerant leaks. Furthermore, an air conditioner is provided with a indoor unit housing a heat exchanger (3) and a fan (7) inside its casing (2) that has an inlet port (8) and an outlet port (5). The air conditioner rotates the fan (7) and flows the flammable refrigerant through the heat exchanger (3) during operation, performing heat exchange between air taken into the casing (2) through the inlet port (8) and the flammable refrigerant, and blows out the air that has undergone the heat exchange to the inside of a room through the outlet port (5).Type: GrantFiled: May 24, 2002Date of Patent: November 11, 2003Assignee: Daikin Industries, Ltd.Inventors: Shigeharu Taira, Youichi Ohnuma, Masahito Yoshizawa
-
Patent number: 6637236Abstract: A refrigerating device circulating R32 in a refrigerant circuit as a refrigerant to perform a refrigerating cycle, the refrigerating device comprising a compressor in the refrigerant circuit, a first heat exchanger serving as a condenser, an expansion means and a second heat exchanger serving as an evaporator, wherein a ratio m of an internal volume (Vout) of the first heat exchanger to an internal volume (Vin) of the second heat exchanger is set to be in a range of 0.7≦m≦1.5.Type: GrantFiled: June 26, 2002Date of Patent: October 28, 2003Assignee: Daikin Industries, Ltd.Inventor: Shigeharu Taira
-
Patent number: 6591631Abstract: A refrigeration unit for performing a refrigerating cycle by circulating R32 as a refrigerant through a refrigerant circuit composed of a compressor (23), a condenser (22), expansion means (26), and an evaporator (2). An amount of R32 for filling the refrigerant circuit is set to be in a range of 120 g to 450 g per kW of refrigerating capacity, or an amount of R32 for filling the refrigerant circuit is set to be in a range of 400 g to 750 g per liter of unobstructed capacity of the condenser (22). By using R32 as a refrigerant that is small in Global Warming Potential (GWP), an energy-saving refrigeration against global warming with high coefficient of performance (COP) is obtained.Type: GrantFiled: April 18, 2002Date of Patent: July 15, 2003Assignee: Daiken Industries, Ltd.Inventor: Shigeharu Taira
-
Patent number: 6581397Abstract: A refrigerating device has a refrigerant circuit having a compressor (1), an indoor heat exchanger (3), a main motor operated valve (EV1), and an indoor heat exchanger (5) connected in a loop, and uses, as a working medium, an R32 refrigerant or a mixed refrigerant containing R32 at at least 70 wt %. A supercooling heat exchanger (11) is disposed between the indoor heat exchanger (3) and the main motor operated valve (EV1), and the liquid side of the refrigerant circuit are connected to the gas side by by-pass pipes (33, 34) through the supercooling heat exchanger (11). A supercooling motor operated valve (EV2) is disposed at the by-pass pipe (33) upstream of the supercooling heat exchanger (11).Type: GrantFiled: April 18, 2002Date of Patent: June 24, 2003Assignee: Daikin Industries, Ltd.Inventors: Shigeharu Taira, Junichirou Tanaka, Koji Shibaike
-
Patent number: 6569347Abstract: There are provided a refrigerating machine oil which can easily remove a sludge generated in a refrigerant circuit and is easy to return to a compressor and a refrigerator employing the same. A refrigerating machine oil obtained by mixing an alkylbenzene oil and an ether oil is employed in a refrigerant circuit. A sludge generated on an inner surface of a small-diameter portion of a capillary (4) is exfoliated and removed by the alkylbenzene oil while maintaining lubricating performance of a compressor (1) with the ether oil that is well dissolved in an HFC refrigerant, thereby preventing capillary clogging.Type: GrantFiled: June 26, 1998Date of Patent: May 27, 2003Assignee: Daikin Industries, Ltd.Inventors: Ryuzaburo Yajima, Koichi Kita, Shigeharu Taira, Youichi Oonuma, Masaki Nomura
-
Publication number: 20030074905Abstract: There is provided a car air conditioner with a high COP, low GWP and high reliability. A simple refrigerant R32 is filled in a refrigerant circuit 1 of the car air conditioner. This simple refrigerant R32 has a high COP and low GWP, but is easily polarized and produces contaminants and sludge. However, these contaminants and sludge hardly block a motor-driven expansion valve 6 or the like due to vibration and impact of a car. Therefore, this car air conditioner has high reliability. Furthermore, since the simple refrigerant R32 is a simple substance, recycling after collection is easy.Type: ApplicationFiled: August 29, 2002Publication date: April 24, 2003Inventor: Shigeharu Taira
-
Publication number: 20030056525Abstract: An energy-saving type refrigerating device capable of preventing global warming, allowing a communication pipe diameter to be reduced and the number of types of the communication pipe diameters to be reduced while a COP of over the COP obtained when R22 is used is provided by using, as a refrigerant, R32 with small global warming potential (GWP), comprising a compressor (23), a first heat exchanger (22), a expansion means (26), and a second heat exchanger (2), wherein R32 is used as a refrigerant, the diameter of a first communication pipe (42) is set to {fraction (2/8)} in. and that of a second communication pipe (41) is set to ⅜ in. in the refrigerating capacity range of 2.2 to 5.6 kW, the diameter of the first communication pipe (42) is set to {fraction (2/8)} in. and that of the second communication pipe (41) is set to {fraction (4/8)} in. in the refrigerating capacity range of 4.5 to 7.1 kW, and the diameter of the first communication pipe (42) is set to {fraction (2/8)} in.Type: ApplicationFiled: June 27, 2002Publication date: March 27, 2003Inventor: Shigeharu Taira
-
Publication number: 20030057397Abstract: There is provided a working fluid and a refrigerating machine for preventing clogging in a depressurizing mechanism even with use of HFC-base refrigerants. A refrigeration circuit 1 is filled with a working fluid composed of an HFC-base refrigerant containing 50 wt % or more R32 and a mixed refrigerating machine oil. The mixed refrigerating machine oil is made up of a synthetic oil such as an ether oil and an ester oil, and an alkylbenzene-base oil, and the alkylbenzene-base oil accounts for 1 to 90 wt % of the mixed refrigerating machine oil.Type: ApplicationFiled: June 28, 2002Publication date: March 27, 2003Inventor: Shigeharu Taira
-
Publication number: 20030010044Abstract: A refrigerator, comprising an oil deterioration judging container (31) disposed between a four-way directional control valve (2) and a gas closing valve (24), whereby, because a gas refrigerant containing much refrigerating machine oil is discharged from a compressor (1) at the time of heating operation, the degree of deterioration of the oil can be judged easily, and thus the degree of deterioration of the refrigerating machine oil can be judged with a simple structure, and the reliability of the refrigerator can be maintained for long period.Type: ApplicationFiled: August 12, 2002Publication date: January 16, 2003Inventor: Shigeharu Taira
-
Publication number: 20020189280Abstract: A refrigerating device circulating R32 in a refrigerant circuit as a refrigerant to perform a refrigerating cycle, the refrigerating device comprising a compressor in the refrigerant circuit, a first heat exchanger serving as a condenser, an expansion means and a second heat exchanger serving as an evaporator, wherein a ratio m of an internal volume (Vout) of the first heat exchanger to an internal volume (Vin) of the second heat exchanger is set to be in a range of 0.7≦m≦1.5.Type: ApplicationFiled: June 26, 2002Publication date: December 19, 2002Inventor: Shigeharu Taira
-
Publication number: 20020178738Abstract: An air conditioner employing a flammable refrigerant, comprises a sensor (11) that is provided on an external surface of an indoor unit (1) and detects the flammable refrigerant gas, in order to prevent the accident of a fire or the like even when the flammable refrigerant leaks. Furthermore, an air conditioner is provided with a indoor unit housing a heat exchanger (3) and a fan (7) inside its casing (2) that has an inlet port (8) and an outlet port (5). The air conditioner rotates the fan (7) and flows the flammable refrigerant through the heat exchanger (3) during operation, performing heat exchange between air taken into the casing (2) through the inlet port (8) and the flammable refrigerant, and blows out the air that has undergone the heat exchange to the inside of a room through the outlet port (5).Type: ApplicationFiled: May 24, 2002Publication date: December 5, 2002Inventors: Shigeharu Taira, Youichi Ohnuma, Masahito Yoshizawa
-
Patent number: 6481229Abstract: The present invention provides means for selecting a direct drive type electrically driven expansion valve (Z). The present invention includes a compressor (121), an external heat exchanger (123), a direct drive type electrically driven expansion valve (Z), and an internal heat exchanger (131). The rating torque equivalent friction factor E of the direct drive type electrically driven expansion valve (Z) is set to 0.31 or more.Type: GrantFiled: March 15, 2001Date of Patent: November 19, 2002Assignee: Daikin Industries, Ltd.Inventors: Ryuzaburo Yajima, Nobuo Domyo, Shigeharu Taira, Hajime Esumi, Kazuyuki Nishikawa
-
Patent number: 5950452Abstract: A blade 8 is integrally fixed to a roller 7 mounted around an eccentric section 22 of a drive shaft 21. The blade 8 extend radially outwardly of the roller 7, and partitions the inside of a cylinder chamber 41 into a compression chamber X and a suction chamber Y. A protruded end portion of the blade 8 is received in a reception groove 11a of a support member 11 which is pivotally supported by a stationary member 4. A substitute fleon refrigerant is used as a working fluid in the cylinder chamber 41, and an oil adapted to the substitute fleon refrigerant is used as a lubricating oil for a compressor CP. While using the substitute fleon refrigerant, the deterioration of the oil in the compressor is prevented.Type: GrantFiled: July 28, 1997Date of Patent: September 14, 1999Assignee: Daikin Industries, Ltd.Inventors: Katsumi Sakitani, Masanori Masuda, Takahiro Uematsu, Takekazu Obitani, Shigeharu Taira, Youichi Oonuma
-
Patent number: 5806329Abstract: An air conditioner which includes ports (22, 23, 24) provided on portions in a refrigerant circuit where oil are liable to gather, such as bottoms of a compressor (1), accumulator (5), a receiver (12) and the like, through which ports a refrigerant is extracted and charged. The air conditioner is further provided with a control unit (50) for controlling washing operation for the refrigerant circuit, such that at the time of washing of the refrigerant circuit, washing operation is continued under the control of the control unit (50) for a predetermined period of time while increasing a frequency of the compressor (1) so as to, for example, make a temperature in a discharge pipe (2) higher than a predetermined value, and then is stopped, and the washing operation is resumed after a fixed period of time.Type: GrantFiled: April 24, 1997Date of Patent: September 15, 1998Assignee: Daikin Industries, Ltd.Inventors: Shigeharu Taira, Youichi Oonuma