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公开(公告)号：JP2006322698A
公开(公告)日：2006-11-30
申请号：JP2006002696
申请日：2006-01-10
Applicant: DENSO CORP
Inventor： KATO YOSHITAKE , OKAMOTO YOSHIYUKI , SHITAYA MASAHIRO , OHARA TOSHIO , MIYAJIMA NORIYOSHI
Abstract: PROBLEM TO BE SOLVED: To improve heat transfer performance without increasing the number of heat transfer plates in a plate type heat exchanger constituted not to combine separate fin members with the heat transfer plates constituting refrigerant passages. SOLUTION: An air passage 18 is formed between the mutual plate faces of a plurality of heat transfer plates 12 arranged laminated, and a plurality of projecting parts 14 extending in an orthogonal direction to an air flow direction A are integrally formed at the heat transfer plates 12 to project into the air passage 18 from the plate faces. The positions of the projecting parts 14 are mutually shifted with respect to the air flow direction A to form the air passage 18 in meandering shape. Refrigerant passages 15, 16 are formed inside the plurality of projecting parts 14, and fin parts 17 are integrally formed at the heat transfer plates 12 between the plurality of projecting parts 14 so as to project from the plate faces. Each fin part 17 is formed in cut-and-raised shape having a cut face penetrating the plate thickness of the heat transfer plate 12. COPYRIGHT: (C)2007,JPO&INPIT
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公开(公告)号：JP2002221399A
公开(公告)日：2002-08-09
申请号：JP2001017265
申请日：2001-01-25
Applicant: DENSO CORP
Inventor： KAWACHI NORIHIDE , OKINOYA TAKESHI , YAMAUCHI YOSHIYUKI , SHITAYA MASAHIRO , YAMAMOTO KEN
Abstract: PROBLEM TO BE SOLVED: To improve efficiency of a water heat exchanger by preventing water from being circulated, while bypassing a site where a fin (segment) is provided. SOLUTION: A side segment 223n, for regulating the circulation of water nearly in parallel with the longitudinal direction of a tube 223, is formed in one piece, with an inner fin 223f at both end sections 223m in the long-diameter direction of a horizontal tube body 223a (water tube 223), thus preventing most of the water circulating in the water tube 223 from bypassing a site, where the fin 223f (segment 223g) is provided and from being circulated through both the end sections in the long-diameter direction of the water tube 223, hence preventing the amount water being circulated around the inner fin 223f (segment 223g) from decreasing, and improving the heat exchange efficiency (average heat transfer rate: α) of a water heat exchanger 220.
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公开(公告)号：JPH0933138A
公开(公告)日：1997-02-07
申请号：JP18531195
申请日：1995-07-21
Applicant: DENSO CORP
Inventor： TORIGOE EIICHI , SHITAYA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To contrive cooling performance of a layer-built refrigerant evaporator, realize uniform temperature distribution of diffused air, and suppress an increase of pressure loss of refrigerant flowing within a passage located on the windward side. SOLUTION: A width of a windward side evaporation passage 14 of a windward side evaporator main body 3 is narrower than that of a leeward side evaporation passage 13 of a leeward side evaporator main body 2 so that a superheated vapor region of section area of a refrigerant flow passage is made to be small. A large number of ribs 15 provided on the leeward side evaporation passage 13 have an inclination toward a direction of refrigerant flow and a large number of ribs provided on the windward side evaporation passage 14 are arranged in parallel with the direction of the refrigerant flow so that the increase of pressure loss of refrigerant flowing within the windward side flow passage 12 is suppressed. A windward side tank section 23, 24 is provided with a crosssectional area larger than that of a leeward side tank section 21, 22 so that the increase of pressure loss of the refrigerant flowing within the windward side flow passage 12 is suppressed.
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Patent Agency Ranking
公开(公告)号：JPH10213389A
公开(公告)日：1998-08-11
申请号：JP1696297
申请日：1997-01-30
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , YAMAMOTO KEN , KURODA YOSHITAKA , MITSUKAWA KAZUHIRO , KOBAYASHI KAME
Abstract: PROBLEM TO BE SOLVED: To increase withstand pressure of a flat tube in a heat exchanger having an inner fin. SOLUTION: An inner fin 7 is formed by folding a thin plate 7a where first and second protrusions 73, 74 are formed only on a one surface side. Hereby, first and second flat plate parts 71, 72 of the inner fin 7 are securely brought into contact with each other so that both are securely brazed. Accordingly, inner walls of mutually opposing tubs 2 via the inner fin 7 are joined with each other so that withstand pressure of the flat tube 2 is improved.
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公开(公告)号：JPH109713A
公开(公告)日：1998-01-16
申请号：JP16336696
申请日：1996-06-24
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , AZEYANAGI ISAO
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerant condenser in which a cycle efficiency of a freezing cycle can be improved by changing a degree of supercooling of liquid refrigerant in response to either a circulating flow rate of the refrigerant or a cooling load. SOLUTION: A refrigerant flow passage within a refrigerant condenser 3 is formed by connecting first refrigerant flow passage X consisting of a first condensing section A, a liquid receiver section B and a first super-cooling section C and a second refrigerant flow passage Y consisting of a second condensing section D and a second superercooling section D in parallel by separators 15, 25. With such an arrangement as described above, since the first refrigerant flow passage X is a refrigerant flow passage having the first supercooling section C at a downstream side of the liquid receiving section B, a core section 7 capable of attaining a degree of supercooling for the liquid refrigerant is fixed and a degree of supercooling of the liquid refrigerant in the vicinity of the outlet of the first refrigerant flow passage X becomes a constant value. However, since the second refrigerant passage Y hasd no liquid receiving section B, it is possible for the second refreigerant flow passage Y to have a degree of supercooling of the liquid refrigerant corresponding to the circulating flow rate of the refrigerant. Due to this fact, the degree of supercooling of the liquid refrigerant flowing out of the refrigerant condenser 3 is changed in response to the circulating flow rate of the refrigerant.
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公开(公告)号：JPH10288491A
公开(公告)日：1998-10-27
申请号：JP11531197
申请日：1997-04-16
Applicant: DENSO CORP
Inventor： MITSUKAWA KAZUHIRO , KURODA YOSHITAKA , KOBAYASHI KAME , YAMAMOTO KEN , SHITAYA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a flat tube for heat exchanger that maintains uniform and superior heat transfer characteristics and can reduce the number of parts and cost, and provide further its manufacturing method. SOLUTION: A flat tube 1 comprises a flat tube 10 where a section shape is flat and at the same time a fluid passage 15 is provided inside and an inner fin 2 that is placed in the fluid passage 15 of the flat tube 10 to disturb the flow of a fluid. The inner fin 2 consists of one rib body 20 with a plurality of ribs 21 being arranged obliquely in parallel and at the same time is constituted by folding the rib body 20 doubly so that the ribs 21 cross each other. Also, the inner fin 2 has an engagement part 26 being provided along the longitudinal direction. On the other hand, the flat tube 10 has a positioning part that can be engage with the engagement part 26. The inner fin 2 allows the engagement part 26 to be engaged with the positioning part 16 and is arranged in the flat tube 10.
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公开(公告)号：JPH10281572A
公开(公告)日：1998-10-23
申请号：JP8302997
申请日：1997-04-01
Applicant: DENSO CORP
Inventor： SAKAKIBARA HISASUKE , NISHIDA SHIN , YAMAMOTO KEN , SHITAYA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To improve heat exchange efficiency of an intermediate heat exchanger in a secondary refrigerant freezer. SOLUTION: There are constructed as an integrated structure on an intermediate heat exchanger 4 for evaporating a primary refrigerant (combustible gas) to cool a secondary refrigerant (brine) an internal heat exchange part 40 for heat exchanging the primary refrigerants with each other an orifice (second pressure reducer) 42 for reducing the primary refrigerant passing through line internal heat exchange part 40 to low pressure, and an intermediate heat exchange part 41 for heat exchanging the primary refrigerant and the second refrigerant reduced in pressure to low one through the orifice 42. In the internal heat exchange part 40 there are heat exchanged the intermediate pressure primary refrigerant reduced in pressure through a temperature type expansion valve (first pressure reducer) 3 and the low pressure primary refrigerant passing through the intermediate heat exchange part 41. Hereby, the primary refrigerant is at a saturated state of gas/liquid 2 phases at an outlet of the intermediate heat exchanger 4 which does not have overheating so that a temperature difference between both refrigerants is increased to improve heat exchange efficiency.
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公开(公告)号：JPH09166371A
公开(公告)日：1997-06-24
申请号：JP28518096
申请日：1996-10-28
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , OTA HIROMI , USAMI KIYOSHI , NAKABO TADASHI , MIYATA YOSHIO , MATSUNAGA TAKESHI , NISHIZAWA KAZUTOSHI , IWASHITA SHIYOU
Abstract: PROBLEM TO BE SOLVED: To make an apparatus compact and ensure the low cost without provision of a piping for connecting a receiver and a supercooler with a condenser by disposing in a tank a partition plate for partitioning a plurality of tubes to the condenser and a supercooling part, and further disposing the receiver for feeding a liquid refrigerant to the supercooling part between a condenser part and the supercooling part. SOLUTION: The inside of a first tank 4 is divided into an inflow chamber 13, a second return chamber 14, and an outflow chamber 22 with a separator 10 (partition plate), and an inflow pipe 12 connected with a discharge side of a refrigerant compressor with a lower cap 11 and an outflow pipe 30 connected with a pressure reducer is connected with an upper side cap 11. In contrast, a second tank 5 is constructed into a double pipe structure where a small cylinder 28 communicated with first and second condenser tubes 6, 7 is disposed in a cylinder 27 to which an end of the tube 2 is connected, and a third condensation tube 8 is communicated with the cylinder 27. The inside of the cylinder 27 partitioned with the small cylinder 28 is used as a storage chamber 21, and a supercooling inflow chamber 29 partitioned with the separator 17 located on the upper part of the small cylinder 28 is communicated with the storage chamber 21 after passage through a feed pipe.
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