Patents by Inventor Hiroshi Mieda
Hiroshi Mieda 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: 20180222287Abstract: A heat pump system includes a compressor that compresses and discharges a refrigerant, a decompressor that decompresses the refrigerant, an outdoor unit that exchanges heat between the refrigerant and an outside air, an evaporator that evaporates the refrigerant, a condenser that condenses the refrigerant, an internal heat exchanger, an accumulator that separates the refrigerant into a gas refrigerant and a liquid refrigerant, and a flow pathway changing portion. The internal heat exchanger includes a high-pressure passage through which a high-pressure refrigerant flows, and a low-pressure passage through which a low-pressure refrigerant flows, the internal heat exchanger exchanging heat between the refrigerant flowing through the high-pressure passage and the refrigerant flowing through the low-pressure passage. The flow pathway changing portion that switches between a cooling pathway and a heating pathway. According to this heat pump system, a cooling capacity and a heating capacity can be improved.Type: ApplicationFiled: July 12, 2016Publication date: August 9, 2018Applicant: DENSO CORPORATIONInventors: Hiroshi MIEDA, Ryohei SUGIMURA, Masaaki KAWAKUBO, Yuichi KAMI
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Patent number: 9347711Abstract: A chemical heat accumulator includes first- to Mth-stage heat storage units and a condensing part. Each heat storage unit includes a reaction vessel housing first reactant, a container housing second reactant, and a connection passage connecting the reaction vessel and the container for guiding the second reactant from the container to the reaction vessel. The connection passage is provided with an opening/closing member for opening and closing the connection passage. The reaction vessel of the Mth-stage heat storage unit is thermally connected with an object to be heated. The reaction vessel of a (N?1)th-stage heat storage unit is thermally connected with the container of an Nth-stage heat storage unit. M is an integer equal to or greater than 2, and N is an integer equal to or greater than 2 and equal to or less than M.Type: GrantFiled: March 17, 2011Date of Patent: May 24, 2016Assignee: DENSO CORPORATIONInventor: Hiroshi Mieda
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Patent number: 8951475Abstract: A chemical heat accumulator includes a receptacle, a first reaction vessel, and a second reaction vessel. The first reaction vessel is hermetically connected to the receptacle and supplied with water from the receptacle. The first reaction vessel contains a chemical compound that causes a hydration reaction with the water from the receptacle to generate water vapor by a heat of reaction, and causes a dehydration reaction by receiving heat. The second reaction vessel is hermetically connected to the first reaction vessel and supplied with the water vapor from the first reaction vessel. The second reaction vessel contains a chemical heat storage material that generates heat by causing a hydration reaction with the water vapor from the first reaction vessel and stores heat through a dehydration reaction caused by receiving heat. The chemical heat storage material is thermally in contact with an object to be heated.Type: GrantFiled: March 29, 2012Date of Patent: February 10, 2015Assignee: Denso CorporationInventors: Katsuya Komaki, Hiroshi Mieda, Tadahiro Nakagawa, Takashi Shimazu, Tomohisa Wakasugi, Hiroyuki Mitsui, Hideo Sobukawa
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Patent number: 8770267Abstract: An adsorption module has heat medium pipes through which a fluid flows, a porous heat transferring member, and adsorbent. The porous heat transferring member is a sintered body formed by sintering a metallic material that is in a form of one of powders, particles and fibers, and has pores for allowing an adsorbed medium to pass through. The porous heat transferring member is disposed on peripheries of the heat medium pipes and bonded to outer surfaces of the heat medium pipes by sintering. The adsorbent is disposed in the pores. The porous heat transferring member further has an adsorbed medium passage for allowing the adsorbed medium to pass through. The adsorbed medium passage is located between the heat medium pipes, and extends straight and parallel to axes of the heat medium pipes.Type: GrantFiled: September 27, 2007Date of Patent: July 8, 2014Assignee: Denso CorporationInventors: Hisao Nagashima, Masaaki Tanaka, Satoshi Inoue, Hiroshi Mieda, Seiji Inoue, Katsuya Komaki
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Publication number: 20120251394Abstract: A chemical heat accumulator includes a receptacle, a first reaction vessel, and a second reaction vessel. The first reaction vessel is hermetically connected to the receptacle and supplied with water from the receptacle. The first reaction vessel contains a chemical compound that causes a hydration reaction with the water from the receptacle to generate water vapor by a heat of reaction, and causes a dehydration reaction by receiving heat. The second reaction vessel is hermetically connected to the first reaction vessel and supplied with the water vapor from the first reaction vessel. The second reaction vessel contains a chemical heat storage material that generates heat by causing a hydration reaction with the water vapor from the first reaction vessel and stores heat through a dehydration reaction caused by receiving heat. The chemical heat storage material is thermally in contact with an object to be heated.Type: ApplicationFiled: March 29, 2012Publication date: October 4, 2012Applicant: DENSO CORPORATIONInventors: Katsuya Komaki, Hiroshi Mieda, Tadahiro Nakagawa, Takashi Shimazu, Tomohisa Wakasugi, Hiroyuki Mitsui, Hideo Sobukawa
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Publication number: 20110226447Abstract: A chemical heat accumulator includes first- to Mth-stage heat storage units and a condensing part. Each heat storage unit includes a reaction vessel housing first reactant, a container housing second reactant, and a connection passage connecting the reaction vessel and the container for guiding the second reactant from the container to the reaction vessel. The connection passage is provided with an opening/closing member for opening and closing the connection passage. The reaction vessel of the Mth-stage heat storage unit is thermally connected with an object to be heated. The reaction vessel of a (N?1)th-stage heat storage unit is thermally connected with the container of an Nth-stage heat storage unit. M is an integer equal to or greater than 2, and N is an integer equal to or greater than 2 and equal to or less than M.Type: ApplicationFiled: March 17, 2011Publication date: September 22, 2011Applicant: DENSO CORPORATIONInventor: Hiroshi Mieda
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Patent number: 7810352Abstract: A heat exchanger having an adsorbing core is advantageously applied to a refrigerating system mounted on an automotive vehicle. The adsorbing core absorbs heat from coolant and gives heat to the coolant thereby to perform heat-exchanging operation. The adsorbing core is composed of a heat exchanging member such as tubes or fins of the heat exchanger and a attracting layer connected to the surface of the heat exchanging member. A seed crystal retaining layer is firmly connected to the surface of the heat exchanging member, and the attractant crystals forming the attractant layer are grown on the seed crystals by a hydrothermal crystal growth method. Since the attracting layer is uniformly formed and firmly connected to the surface of the heat exchanging member, heat is quickly transferred between the attractant layer and the heat exchanging member.Type: GrantFiled: October 9, 2006Date of Patent: October 12, 2010Assignee: Denso CorporationInventors: Hiroshi Mieda, Seiji Inoue, Satoshi Inoue
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Publication number: 20080078532Abstract: An adsorption module has heat medium pipes through which a fluid flows, a porous heat transferring member, and adsorbent. The porous heat transferring member is a sintered body formed by sintering a metallic material that is in a form of one of powders, particles and fibers, and has pores for allowing an adsorbed medium to pass through. The porous heat transferring member is disposed on peripheries of the heat medium pipes and bonded to outer surfaces of the heat medium pipes by sintering. The adsorbent is disposed in the pores. The porous heat transferring member further has an adsorbed medium passage for allowing the adsorbed medium to pass through. The adsorbed medium passage is located between the heat medium pipes, and extends straight and parallel to axes of the heat medium pipes.Type: ApplicationFiled: September 27, 2007Publication date: April 3, 2008Applicant: DENSO CorporationInventors: Hisao Nagashima, Masaaki Tanaka, Satoshi Inoue, Hiroshi Mieda, Seiji Inoue, Katsuya Komaki
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Publication number: 20080028787Abstract: An adsorption type heat exchanger includes a heat exchange part, in which a thermal medium circulates, and adsorbents made of particles. The adsorbents are fixed on an outer surface of the heat exchange part, to adsorb refrigerant vapor when a temperature of the thermal medium is low, and to desorb the adsorbed refrigerant vapor when the temperature of the thermal medium is high. In addition, percents of the adsorbents having particle sizes about in a range from 0 to 42 ?m are about 90% and over of the whole adsorbents.Type: ApplicationFiled: July 31, 2007Publication date: February 7, 2008Applicant: DENSO CorporationInventors: Hiroshi Mieda, Seiji Inoue, Satoshi Inoue, Hisao Nagashima, Masaaki Tanaka
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Patent number: 7266967Abstract: An air conditioner for an automotive vehicle having a water-cooling type internal combustion engine includes: a first refrigerator; and an adsorption type refrigerator having adsorbent. The first refrigerator controls temperature of air to be blown into a passenger compartment of the vehicle. The adsorbent generates adsorption heat when the adsorbent adsorbs the medium, and desorbs the adsorbed medium when the adsorbent is heated by coolant water in the internal combustion engine. The air to be blown into the passenger compartment is heated by the adsorption heat of the adsorbent, and is cooled by evaporation latent heat of the medium.Type: GrantFiled: February 2, 2005Date of Patent: September 11, 2007Assignee: DENSO CorporationInventors: Satoshi Inoue, Shigeji Ooishi, Hideaki Satoh, Hiroshi Mieda
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Publication number: 20070095277Abstract: A heat exchanger having an adsorbing core is advantageously applied to a refrigerating system mounted on an automotive vehicle. The adsorbing core absorbs heat from coolant and gives heat to the coolant thereby to perform heat-exchanging operation. The adsorbing core is composed of a heat exchanging member such as tubes or fins of the heat exchanger and a attracting layer connected to the surface of the heat exchanging member. A seed crystal retaining layer is firmly connected to the surface of the heat exchanging member, and the attractant crystals forming the attractant layer are grown on the seed crystals by a hydrothermal crystal growth method. Since the attracting layer is uniformly formed and firmly connected to the surface of the heat exchanging member, heat is quickly transferred between the attractant layer and the heat exchanging member.Type: ApplicationFiled: October 9, 2006Publication date: May 3, 2007Applicant: DENSO CorporationInventors: Hiroshi Mieda, Seiji Inoue, Satoshi Inoue
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Publication number: 20060112706Abstract: An air conditioner for an automotive vehicle having a water-cooling type internal combustion engine includes: a first refrigerator; and an adsorption type refrigerator having adsorbent. The first refrigerator controls temperature of air to be blown into a passenger compartment of the vehicle. The adsorbent generates adsorption heat when the adsorbent adsorbs the medium, and desorbs the adsorbed medium when the adsorbent is heated by coolant water in the internal combustion engine. The air to be blown into the passenger compartment is heated by the adsorption heat of the adsorbent, and is cooled by evaporation latent heat of the medium.Type: ApplicationFiled: February 2, 2005Publication date: June 1, 2006Applicant: DENSO CorporationInventors: Satoshi Inoue, Shigeji Ooishi, Hideaki Satoh, Hiroshi Mieda
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Patent number: 6807820Abstract: In a heat storage system for a vehicle, when a temperature of cooling water from a vehicle engine is high, adsorbents are heated by the cooling water, so that moisture is desorbed from the adsorbents in order to store heat. When the temperature of cooling water is low, the moisture is adsorbed in the adsorbents to heat the cooling water, while refrigerant in a vapor compression refrigerator is cooled by evaporating water. Thus, adsorption heat is generated from the adsorbents, and the cooling water is heated by using the adsorption heat. Accordingly, warm-up operation of the vehicle engine is facilitated, while motive power consumed by the vapor compression refrigerator can be reduced.Type: GrantFiled: February 14, 2003Date of Patent: October 26, 2004Assignee: Denso CorporationInventors: Yasukazu Aikawa, Takahisa Suzuki, Satoshi Inoue, Hideaki Sato, Hiroshi Mieda
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Publication number: 20030167925Abstract: In a heat storage system for a vehicle, when a temperature of cooling water from a vehicle engine is high, adsorbents are heated by the cooling water, so that moisture is desorbed from the adsorbents in order to store heat. When the temperature of cooling water is low, the moisture is adsorbed in the adsorbents to heat the cooling water, while refrigerant in a vapor compression refrigerator is cooled by evaporating water. Thus, adsorption heat is generated from the adsorbents, and the cooling water is heated by using the adsorption heat. Accordingly, warm-up operation of the vehicle engine is facilitated, while motive power consumed by the vapor compression refrigerator can be reduced.Type: ApplicationFiled: February 14, 2003Publication date: September 11, 2003Inventors: Yasukazu Aikawa, Takahisa Suzuki, Satoshi Inoue, Hideaki Sato, Hiroshi Mieda