Patents by Inventor Takeo Ueno
Takeo Ueno 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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Publication number: 20090007589Abstract: A refrigeration apparatus (1) is provided with a refrigerant circuit (1E) along which are connected a compressor (2), an outdoor heat exchanger (4), an expansion mechanism, an indoor heat exchanger (41) for providing room air conditioning, and a cooling heat exchanger (45, 51) for providing storage compartment cooling. The refrigerant circuit (1E) includes a discharge side three way switch valve (101) for varying the flow rate of a portion of the refrigerant which is discharged out of the compressor (2) and then distributed to the indoor heat exchanger (41) and the outdoor heat exchanger (4) during a heat recovery operation mode in which the indoor heat exchanger (41) and the outdoor heat exchanger (4) operate as condensers. As a result of such arrangement, even when the amount of heat obtained in the cooling heat exchanger (45, 51) exceeds the amount of heat required in the indoor heat exchanger (41), surplus heat is discharged without excessive decrease in the discharge pressure of the compressor (2).Type: ApplicationFiled: August 1, 2005Publication date: January 8, 2009Inventors: Masaaki Takegami, Takeo Ueno, Kenji Tanimoto, Satoru Sakae
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Patent number: 7305846Abstract: In a refrigerant circuit (20), a refrigerator circuit (110) and a freezing circuit (30) are connected in parallel to an outdoor circuit (40). In the freezing circuit (30), a freezer circuit (130) and a booster circuit (140) are connected in series. A booster compressor (141) and a four-way switch valve (142) are provided in the booster circuit (140). During the time when a freezer heat exchanger (131) performs cooling operation for cooling the inside air, refrigerant evaporated in the freezer heat exchanger (131) is compressed in the booster compressor (141), and then, is sucked into a variable capacitance compressor (41). On the other hand, during defrosting of the freezer heat exchanger (131), the refrigerant evaporated in a refrigerator heat exchanger (111) is compressed in the booster compressor (141), and then, is supplied to the freezer heat exchanger (131).Type: GrantFiled: May 28, 2004Date of Patent: December 11, 2007Assignee: Daikin Industries, Ltd.Inventors: Takeo Ueno, Masaaki Takegami, Hiroto Nakajima, Koichi Kita
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Patent number: 7237405Abstract: In the case where a 100 percent heat recovery operation mode is performed without using an outdoor heat exchanger in a refrigeration apparatus which is provided with utilization-side heat exchangers of a plurality of piping systems and in which liquid-side communication lines are arranged into a single line, a backflow prevention mechanism (37) for preventing liquid refrigerant exiting an indoor heat exchanger (41) from flowing in a direction other than in the direction of cold storage and freeze storage heat exchangers (45, 51) is disposed for providing stable flow of refrigeration through the circuit even when the temperature of outside air is low, whereby the capability to provide refrigeration is prevented from degrading.Type: GrantFiled: October 5, 2004Date of Patent: July 3, 2007Assignee: Daikin Industries, Ltd.Inventors: Masaaki Takegami, Kenji Tanimoto, Takeo Ueno, Akihiro Kajimoto
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Publication number: 20060272345Abstract: In a refrigerant circuit (20), a refrigerator circuit (110) and a freezing circuit (30) are connected in parallel to an outdoor circuit (40). In the freezing circuit (30), a freezer circuit (130) and a booster circuit (140) are connected in series. A booster compressor (141) and a four-way switch valve (142) are provided in the booster circuit (140). During the time when a freezer heat exchanger (131) performs cooling operation for cooling the inside air, refrigerant evaporated in the freezer heat exchanger (131) is compressed in the booster compressor (141), and then, is sucked into a variable capacitance compressor (41). On the other hand, during defrosting of the freezer heat exchanger (131), the refrigerant evaporated in a refrigerator heat exchanger (111) is compressed in the booster compressor (141), and then, is supplied to the freezer heat exchanger (131).Type: ApplicationFiled: May 28, 2004Publication date: December 7, 2006Inventors: Takeo Ueno, Masaaki Takegami, Hiroto Nakajima, Koichi Kita
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Publication number: 20060123835Abstract: In the case where a 100 percent heat recovery operation mode is performed without using an outdoor heat exchanger in a refrigeration apparatus which is provided with utilization-side heat exchangers of a plurality of piping systems and in which liquid-side communication lines are arranged into a single line, a backflow prevention mechanism (37) for preventing liquid refrigerant exiting an indoor heat exchanger (41) from flowing in a direction other than in the direction of cold storage and freeze storage heat exchangers (45, 51) is disposed for providing stable flow of refrigeration through the circuit even when the temperature of outside air is low, whereby the capability to provide refrigeration is prevented from degrading.Type: ApplicationFiled: October 5, 2004Publication date: June 15, 2006Inventors: Masaaki Takegami, Kenji Tanimoto, Takeo Ueno, Akihiro Kajimoto
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Patent number: 7028502Abstract: In a refrigerating apparatus comprising a plurality of application-side heat exchangers (41), (45, 51) for air-conditioning and for cold-storage/freezing, it is configured so as to be capable of corresponding to various types of operation patterns when a compression mechanism (2) is configured by two compressors (2A, 2B). In order to continue operation even if one compressor is broken, a switching mechanism such as a four-way selector valve (3C) is provided on the suction side of the two compressors (2A, 2B), so that a plurality of operation patterns can be performed in a predetermined operation mode.Type: GrantFiled: July 2, 2003Date of Patent: April 18, 2006Assignee: Daikin Industries, Ltd.Inventors: Masaaki Takegami, Takeo Ueno, Kenji Tanimoto
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Patent number: 6883346Abstract: In a refrigerating apparatus (1) having application-side heat exchangers (41, 45, 51) for a plurality of systems for air-conditioning, for cold-storage/freezing and the like and a four-way switch valve (3C) and a plurality of check valves (7) on suction sides of compression mechanisms (2D, 2E) and formed from three compressors (2A, 2B, 2C) to allow the operation states to be switched, the number of compressors (2A, 2B, 2C) used at air-conditioning side and cold-storage/freezing side is limited to two at maximum, thereby achieving a simple circuit configuration in which the number of the check valves (7) to be provided in the suction sides of the compression mechanisms (2D, 2E) is reduced to one or two, suppressing the occurrence of chattering noise in check valves (7) and, also, preventing an ability from reducing due to a suction-side pressure loss.Type: GrantFiled: October 23, 2002Date of Patent: April 26, 2005Assignee: Daikin Industries, Ltd.Inventors: Kenji Tanimoto, Takeo Ueno, Masaaki Takegami, Satoru Sakae
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Publication number: 20040237578Abstract: In a refrigerating apparatus comprising a plurality of application-side heat exchangers (41), (45, 51) for air-conditioning and for cold-storage/freezing, it is configured so as to be capable of corresponding to various types of operation patterns when a compression mechanism (2) is configured by two compressors (2A, 2B). In order to continue operation even if one compressor is broken, a switching mechanism such as a four-way selector valve (3C) is provided on the suction side of the two compressors (2A, 2B), so that a plurality of operation patterns can be performed in a predetermined operation mode.Type: ApplicationFiled: March 11, 2004Publication date: December 2, 2004Inventors: Masaaki Takegami, Takeo Ueno, Kenji Tanimoto
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Publication number: 20040093893Abstract: In a refrigerating apparatus (1) having application-side heat exchangers (41, 45, 51) for a plurality of systems for air-conditioning, for cold-storage/freezing and the like and a four-way switch valve (3C) and a plurality of check valves (7) on suction sides of compression mechanisms (2D, 2E) and formed from three compressors (2A, 2B, 2C) to allow the operation states to be switched, the number of compressors (2A, 2B, 2C) used at air-conditioning side and cold-storage/freezing side is limited to two at maximum, thereby achieving a simple circuit configuration in which the number of the check valves (7) to be provided in the suction sides of the compression mechanisms (2D, 2E) is reduced to one or two, suppressing the occurrence of chattering noise in check valves (7) and, also, preventing an ability from reducing due to a suction-side pressure loss.Type: ApplicationFiled: July 23, 2003Publication date: May 20, 2004Inventors: Kenji Tanimoto, Takeo Ueno, Masaaki Takegami, Satoru Sakae
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Patent number: 6722156Abstract: A refrigeration system includes a chiller unit and a freezer unit. The freezer unit is provided with a freezing compressor for compressing a refrigerant in a total of two stages together with a compressor in an outdoor unit. The freezing compressor is formed by an inverter compressor. An oil separator is disposed on the discharge pipe of the freezing compressor. On the inlet pipe of the freezing compressor, a heat exchanger is provided for cooling an inverter with an refrigeration oil separated by the oil separator and a suction refrigerant.Type: GrantFiled: June 6, 2002Date of Patent: April 20, 2004Assignee: Daikin Industries, Ltd.Inventors: Kenji Tanimoto, Takeo Ueno, Masaaki Takegami, Kazuyoshi Nomura
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Patent number: 6698217Abstract: An object of the present invention is to continue operation as it is without inducing any degradation of performance of a compressor even if one of compressors is broken down in a refrigeration apparatus which can freely cool or warm the inside of a room, cool a refrigerating show case and cool a freezing show case. A refrigeration apparatus (1) comprises a non-inverter compressor (2A), a first inverter compressor (2B) and a second inverter compressor (2C). If the first inverter compressor (2B) is broken down during a cooling/freezing operation in which a cooling operation is performed by an inside heat exchanger (41), a refrigerating heat exchanger (45) and a freezing heat exchanger (51), the operation is continued by opening a solenoid valve (7a) disposed on a first sub pipe (23).Type: GrantFiled: February 24, 2003Date of Patent: March 2, 2004Assignee: Daikin Industries, Ltd.Inventors: Kenji Tanimoto, Masaaki Takegami, Takeo Ueno, Kazuyoshi Nomura, Akihiro Kajimoto
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Publication number: 20030233836Abstract: An object of the present invention is to continue operation as it is without inducing any degradation of performance of a compressor even if one of compressors is broken down in a refrigeration apparatus which can freely cool or warm the inside of a room, cool a refrigerating show case and cool a freezing show case. A refrigeration apparatus (1) comprises a non-inverter compressor (2A), a first inverter compressor (2B) and a second inverter compressor (2C). If the first inverter compressor (2B) is broken down during a cooling/freezing operation in which a cooling operation is performed by an inside heat exchanger (41), a refrigerating heat exchanger (45) and a freezing heat exchanger (51), the operation is continued by opening a solenoid valve (7a) disposed on a first sub pipe (23).Type: ApplicationFiled: February 24, 2003Publication date: December 25, 2003Inventors: Kenji Tanimoto, Masaaki Takegami, Takeo Ueno, Kazuyoshi Nomura, Akihiro Kajimoto
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Publication number: 20030226370Abstract: A refrigeration system includes a chiller unit and a freezer unit. The freezer unit is provided with a freezing compressor for compressing a refrigerant in a total of two stages together with a compressor in an outdoor unit. The freezing compressor is formed by an inverter compressor. An oil separator is disposed on the discharge pipe of the freezing compressor. On the inlet pipe of the freezing compressor, a heat exchanger is provided for cooling an inverter with an refrigeration oil separated by the oil separator and a suction refrigerant.Type: ApplicationFiled: June 6, 2002Publication date: December 11, 2003Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kenji Tanimoto, Takeo Ueno, Masaaki Takegami, Kazuyoshi Nomura
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Patent number: 6609390Abstract: A two-stage cascade refrigerating system including a primary side refrigerant circuit, and at least one secondary side refrigerant circuit. The receiver of the primary refrigerant circuit is arranged such that a first pipe is introduced to the inside of the container such that an open of the first pipe is located at an inside upper portion of the container, and a second pipe is introduced to the inside of a container such that an open end of the second pipe is located at an inside lower portion of the container. The receiver of the secondary side refrigerant circuit(s) is reversible in refrigerant circulation and is arranged such that a first pipe and a second pipe are introduced to the inside of the container such that open ends of both pipes are located at an inside lower position of the container.Type: GrantFiled: March 28, 2001Date of Patent: August 26, 2003Assignee: Daikin Industries, Ltd.Inventors: Akitoshi Ueno, Takeo Ueno
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Patent number: 6405554Abstract: The refrigerating system includes a low stage side refrigerant circuit (2) formed by connecting a low stage side compressor (4), a cascade condenser (5), a low stage side receiver (6), a low stage side expansion valve (7) formed of a temperature-sensitive expansion valve and an evaporator (8) in this order. The system also includes a high stage side refrigerant circuit (3) formed by connecting a high stage side compressor (9), a condenser (10), a high stage side receiver (11), a high stage side expansion valve (12) formed of a motor-operated expansion valve and the cascade condenser (5) in this order. The opening of the high stage side expansion valve (12) is adjusted so that the pressure sensed by a high-pressure sensor (SPH2) for sensing the high pressure in the low stage side refrigerant circuit (2) reaches a predetermined target high pressure.Type: GrantFiled: March 28, 2001Date of Patent: June 18, 2002Assignee: Daikin Industries, Ltd.Inventors: Noriyasu Kawakatu, Akitoshi Ueno, Toshiaki Mukaidani, Takeo Ueno
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Patent number: 6321542Abstract: A closed circuit (13) is formed such that the upper ends of preinstalled refrigerant pipes (2A, 2B) in a refrigerant circuit are connected to each other through an upper connecting passage (11) and the lower ends thereof are connected to each other through a lower connecting passage (12). A refrigerant is charged into the closed circuit (13). In a separator (50) of the lower connecting passage (12), a separating heat exchange coil (52) heats the liquid refrigerant to evaporate it, and a filter (53) captures foreign substance from the gas refrigerant. Two conveying heat exchangers (7A, 7B) of the lower connecting passage (12) alternately carry out a repetitive cooling operation of cooling the gas refrigerant, having been changed in phase by the separator (50), to change the phase from gas to liquid and a repetitive pressurizing operation of pressurizing the liquid refrigerant by heating the refrigerant to the extent kept in the liquid phase, respectively, thereby applying a running force to the refrigerant.Type: GrantFiled: September 30, 1999Date of Patent: November 27, 2001Assignee: Daikin Industries, Ltd.Inventors: Takeo Ueno, Toshihiro Iijima, Masaaki Takegami, Masaki Yamamoto
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Patent number: 6279330Abstract: A piping cleaning system switches over a four-way switching valve 43 of a heat pump circuit 200 so that two transfer heat exchangers 25, 26 are operated alternately as a cooling device and a heating device, by which a cleaning refrigerant in a cleaning circuit 2 is circulated through a gas line 3 and a liquid line 5. During this cleaning operation with the cleaning refrigerant circulated, when the cleaning refrigerant runs short in amount, a solenoid valve SV3 is opened so that cleaning refrigerant of the refrigerant cylinder 71 is resupplied through a refrigerant resupply line 72 to either one of the transfer heat exchangers 25 or 26 that is cooling. On the other hand, when the cleaning refrigerant is excessive, a solenoid valve SV4 is opened so that the cleaning refrigerant is returned to the refrigerant cylinder 71 through a refrigerant bleed line 73. Thus, the amount of cleaning refrigerant can be maintained at an appropriate level.Type: GrantFiled: March 10, 2000Date of Patent: August 28, 2001Assignee: Daikin Industries, Ltd.Inventors: Takeo Ueno, Toshihiro Iijima, Masaaki Takegami
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Patent number: 6263691Abstract: This refrigerant recovery system is provided with recovery piping 2, heat exchangers 25, 26 and check valves 30, 31, 37, 38. A refrigerant within the recovery piping 2 is heated and cooled by the heat exchangers 25, 26, so that a fluid power is imparted to the refrigerant. This fluid power is regulated to one direction by the check valves 30, 31, 37, 38, by which the refrigerant is transferred in one way within the recovery piping 2. Thus, the refrigerant can be recovered from a gas line 3 and a liquid line 5 with high efficiency. Also, a degassing circuit 306 makes the gas refrigerant within the recovery container 71 merged with the refrigerant within the recovery piping 2 cooled by the heat exchanger 25 or 26, by which the recovery container 71 can be degassed. Also, the refrigerant can be recovered to the recovery container 71 smoothly, so that the refrigerant can be recovered efficiently.Type: GrantFiled: March 10, 2000Date of Patent: July 24, 2001Assignee: Daikin Industries, Ltd.Inventors: Takeo Ueno, Toshihiro Iijima, Masaaki Takegami
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Patent number: 6062035Abstract: By using a heat storage circuit or a refrigerating cycle as a heat source, cold heat or hot heat is applied from the heat source to secondary refrigerant in a main refrigerant circuit (20). By a heating or a cooling action of a small-sized refrigerating machine (40), a moving force is given to refrigerant in the main refrigerant circuit (20). Thereby, the secondary refrigerant in the main refrigerant circuit (20) circulates between a heat source-side heat exchanger (21) and an indoor heat exchanger (22) to heat or cool a room.Type: GrantFiled: April 22, 1998Date of Patent: May 16, 2000Assignee: Daikin Industries, Ltd.Inventor: Takeo Ueno
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Patent number: 5533351Abstract: A reversibly operatable refrigerant circulating circuit (1) is formed in such a manner that a compressor (21), an outdoor heat exchanger (23), a motor-operated expansion valve (25) through which refrigerant flows in both directions and an indoor heat exchanger (31) are connected in this order. Between the motor-operated expansion valve (25) and the indoor heat exchanger (31), there is provided a refrigerant regulator (4) for regulating a circulation amount of refrigerant in a cooling operation cycle and storing liquefied refrigerant in a heating operation cycle. The refrigerant regulator (4) has a first flow pipe (42) to which the outdoor heat exchanger (23) is connected and a second flow pipe (43) which has plural refrigerant holes (45, 45 . . . ) and to which the indoor heat exchanger (31) is connected.Type: GrantFiled: September 23, 1994Date of Patent: July 9, 1996Assignee: Daikin Industries, Ltd.Inventors: Kenji Miyata, Hideki Tsujii, Shinichi Oka, Masaaki Takegami, Takeo Ueno, Tetsuya Suda