Patents by Inventor Michimasa Takeshita
Michimasa Takeshita 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: 6192976Abstract: A plurality of heat transfer tubes are disposed at certain intervals, in-tube operating fluid (such as coolant) passes therethrough, and a plurality of small-gage wires are used as a heating fin. One small-gage wire is wound at a pair of heat transfer tubes 1a and 1c in a spiral manner, and another small-gage wire is wound at a pair of heat transfer tubes 1b and 1c in the spiral manner, and still another small-gage wire is wound at a pair of heat transfer tubes 1b and 1d in the spiral manner. Thereby, while higher heat transfer coefficient can be achieved, and a heating surface area is ensured, clogging can be avoided even when moisture in air condenses on a surface of a heat exchanger. As a result, it is possible to realize a high-performance and compact heat exchanger used for air conditioning.Type: GrantFiled: July 28, 1998Date of Patent: February 27, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takayuki Yoshida, Takashi Gotoh, Tsuneo Yumikura, Michimasa Takeshita, Atsushi Motizuki, Yuji Sueto, Kaoru Ikejima
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Patent number: 5964284Abstract: A heat exchanger for an air conditioner comprises a plurality of heat-transfer tubes arranged in parallel to each other at predetermined intervals, and heat-transfer fins formed by helically winding a plurality of fine wires around the plurality of heat-transfer tubes. Preferably, the heat-transfer tubes are divided into groups of two adjacent heat-transfer tubes (1a, 1b), (1b, 1c), (1c, 1d), . . . , and at least one fine wire fin is wound helically around the two adjacent heat-transfer tubes of each group so that the fine wire fin does not cross other portions of the fine wire fin as viewed along a direction perpendicular to a plane including the axes of the plurality of heat-transfer tubes. When fabricating the heat exchanger, at least either the outer circumferences of the heat-transfer tubes or the outer circumferences of the fine wires are coated with a metal film formed by plating, and then the heat-transfer tubes and the fine wires are interlaced to form a heat exchanging structure.Type: GrantFiled: February 10, 1998Date of Patent: October 12, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kaoru Ikejima, Takashi Gotoh, Tsuneo Yumikura, Michimasa Takeshita, Takayuki Yoshida
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Patent number: 5822854Abstract: A heat exchanger for an air conditioner includes a plurality of heat-transfer tubes arranged in parallel to each other at predetermined intervals, and heat-transfer fins formed by helically winding a plurality of fine wires around the plurality of heat-transfer tubes. Preferably, the heat-transfer tubes are divided into groups of two adjacent heat-transfer tubes (1a, 1b), (1b, 1c), (1c, 1d), . . . , and at least one fine wire fin is wound helically around the two adjacent heat-transfer tubes of each group so that the fine wire fin does not cross other portions of the fine wire fin as viewed along a direction perpendicular to a plane including the axes of the plurality of heat-transfer tubes. When fabricating the heat exchanger, at least either the outer circumferences of the heat-transfer tubes or the outer circumferences of the fine wires are coated with a metal film formed by plating, and then the heat-transfer tubes and the fine wires are interlaced to form a heat exchanging structure.Type: GrantFiled: June 6, 1996Date of Patent: October 20, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kaoru Ikejima, Takashi Gotoh, Tsuneo Yumikura, Michimasa Takeshita, Takayuki Yoshida
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Patent number: 5806585Abstract: A plurality of heat transfer tubes are disposed at certain intervals, in-tube operating fluid (such as coolant) passes therethrough, and a plurality of small-gage wires are used as a heating fin. One small-gage wire is wound at a pair of heat transfer tubes 1a and 1c in a spiral manner, and another small-gage wire is wound at a pair of heat transfer tubes 1b and 1c in the spiral manner, and still another small-gage wire is wound at a pair of heat transfer tubes 1b and 1d in the spiral manner. Thereby, while higher heat transfer coefficient can be achieved, and a heating surface area is ensured, clogging can be avoided even when moisture in air condenses on a surface of a heat exchanger. As a result, it is possible to realize a high-performance and compact heat exchanger used for air conditioning.Type: GrantFiled: November 20, 1995Date of Patent: September 15, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takayuki Yoshida, Takashi Gotoh, Tsuneo Yumikura, Michimasa Takeshita, Atsushi Motizuki, Yuji Sueto, Kaoru Ikejima
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Patent number: 5769157Abstract: A heat exchanger for an air conditioner comprises a plurality of heat-transfer tubes arranged in parallel to each other at predetermined intervals, and heat-transfer fins formed by helically winding a plurality of fine wires around the plurality of heat-transfer tubes. Preferably, the heat-transfer tubes are divided into groups of two adjacent heat-transfer tubes (1a, 1b), (1b, 1c), (1c, 1d), . . . , and at least one fine wire fin is wound helically around the two adjacent heat-transfer tubes of each group so that the fine wire fin does not cross other portions of the fine wire fin as viewed along a direction perpendicular to a plane including the axes of the plurality of heat-transfer tubes. When fabricating the heat exchanger, at least either the outer circumferences of the heat-transfer tubes or the outer circumferences of the fine wires are coated with a metal film formed by plating, and then the heat-transfer tubes and the fine wires are interlaced to form a heat exchanging structure.Type: GrantFiled: April 4, 1995Date of Patent: June 23, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kaoru Ikejima, Takashi Gotoh, Tsuneo Yumikura, Michimasa Takeshita, Takayuki Yoshida
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Patent number: 5706887Abstract: A heat exchanger mounted in an air condition is constructed such that at least one row of heat conduction pipe groups are arranged across an air passage. Each heat conduction pipe group is constructed such that a plurality of heat conduction pipes 22 are arranged in parallel with each other and a fine wire 23 made of a metallic material having excellent heat conductivity is spirally wound around each adjacent heat conduction pipe 22. Thus, the performance of the heat exchanger can be improved without the air conditioner being designed with larger dimensions.In addition, the heat exchanger includes a plurality of heat conduction pipes 39 arranged in the form of at least one row with a constant distance between adjacent pipes, and a plurality of twisted wires 40.Type: GrantFiled: November 27, 1996Date of Patent: January 13, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Michimasa Takeshita, Takayuki Yoshida, Yoshiaki Tanimura, Hitoshi Iijima, Takashi Gotoh, Tsuneo Yumikura
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Patent number: 5704421Abstract: A heat exchanger mounted in an air conditioner is constructed such that at least one row of heat conduction pipe groups are arranged across an air passage. Each heat conduction pipe group is constructed such that a plurality of heat conduction pipes 22 are arranged in parallel with each other and a fine wire 23 made of a metallic material having excellent heat conductivity is spirally wound around each adjacent heat conduction pipe 22. Thus, performances of the heat exchanger can be improved without a possibility that the air conditioner is designed with larger dimensions. In addition, the heat exchanger includes a plurality of heat conduction pipes 39 arranged in the form of at least one row with a constant distance between adjacent ones and a plurality of twisted wires 40.Type: GrantFiled: November 27, 1996Date of Patent: January 6, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Michimasa Takeshita, Takayuki Yoshida, Yoshiaki Tanimura, Hitoshi Iijima, Takashi Gotoh, Tsuneo Yumikura
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Patent number: 5647431Abstract: A heat exchanger mounted on an air condition is constructed such that at least one row of heat conduction pipe groups are arranged across an air passage. Each heat conduction pipe groups is constructed such that a plurality of heat conduction pipes 22 are arranged in parallel with each other and a fine wire 23 made of a metallic material having excellent heat conductivity is spirally wound around each adjacent heat conduction pipes 22. Thus, performances of the heat exchanger can be improved without a possibility that the air conditioner is designed with larger dimensions. In addition, the heat exchanger includes a plurality of heat conduction pipes 39 arranged in the form of at least one row with a constant distance between adjacent ones and a plurality of twisted wires 40.Type: GrantFiled: May 23, 1995Date of Patent: July 15, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Michimasa Takeshita, Takayuki Yoshida, Yoshiaki Tanimura, Hitoshi Iijima, Takashi Gotoh, Tsuneo Yumikura