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公开(公告)号：JPH09170892A
公开(公告)日：1997-06-30
申请号：JP33070195
申请日：1995-12-19
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , TORIGOE EIICHI
Abstract: PROBLEM TO BE SOLVED: To effectively sense the internal leakage when the internal leakage for directly coupling a refrigerant inlet passage to a refrigerant outlet passage occurs due to the occurrence of brazing failure at a partition part between the inlet and outlet passages in a laminate type evaporator having the inlet and outlet passages formed of overhanging parts formed at an end plate. SOLUTION: A through hole 42e having a width equivalent to or more than two overhanging parts 42a, 42b is formed at the connected part 2f connected to the metal thin plate 40 of the end of a heat exchanging unit 3 at the position between the two parts 42a and 42b of an end plate 42. If the connecting failure occurs at the part 42f, the fluid due to the connecting failure is externally leaked via the hole 42e. Thus, the internal leakage between both passages 6 and 7 can be effectively sensed.
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公开(公告)号：JPH09170851A
公开(公告)日：1997-06-30
申请号：JP33209395
申请日：1995-12-20
Applicant: DENSO CORP
Inventor： KAJIKAWA KICHIJI , SHITAYA MASAHIRO , TORIGOE EIICHI
Abstract: PROBLEM TO BE SOLVED: To realize the efficient cooling while the increase in the labor in the assembly is suppressed. SOLUTION: A refrigerant flow passage 13B to communicate upper and lower tanks 2B, 3B located on the downstream side with each other, and a refrigerant flow passage 13A to communicate upper and lower tanks 2A, 3A located on the upstream side with each other are formed on a core plate 5 to constitute a core body. A rib 133 is provided on an inner wall of the refrigerant flow passage 3B, and an inner fin 8 is provided on an inner wall of the refrigerant flow passage 13A to receive the refrigerant after the refrigerant passes through the whole refrigerant flow passage 13B of each core body.
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公开(公告)号：JP2003148891A
公开(公告)日：2003-05-21
申请号：JP2001341048
申请日：2001-11-06
Applicant: TOYOTA CENTRAL RES & DEV , DENSO CORP
Inventor： KANEDA KENJI , OSADA YUJI , YOKOI YUTAKA , SHITAYA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a heat exchanger to be downsized without causing the increase of ventilation resistance and the deterioration of adhesive property of a heat transfer plate constituting a passage. SOLUTION: In an evaporator (the heat exchanger) for exchanging heat between air-conditioning air and a refrigerant by allowing the air-conditioning air and the refrigerant to flow in a mutually intersecting manner, a passage for the flow of air-conditioning air is formed by combining an air passage 30a and an air passage 30b of different passage shape. The air passage 30a is provided with a large number of projecting parts 14 for making the flow of air-conditioning air turbulent, and a passage space H2 is made narrower than a passage space H1. The air passage 30b is not provided with the projections 14.
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公开(公告)号：JP2001041678A
公开(公告)日：2001-02-16
申请号：JP36302799
申请日：1999-12-21
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , YAMAMOTO KEN
IPC: F28F3/04
Abstract: PROBLEM TO BE SOLVED: To ensure required heat transfer performance with only the heat transfer plates constituting a refrigerant channel without requiring any fin. SOLUTION: A board part 13 and punched parts 14 projecting therefrom are formed in each of a plurality of heat transfer plates 12a-12c wherein the punched parts are formed to extend substantially orthogonally to the direction A of air flowing on the outside of the heat transfer plates. Refrigerant channels 19, 20 are formed on the inside of the punched parts 14 so that the punched parts impede straight advance of air flow and serve as a turbulence generator. Pitch of the punched parts 14 is set at 2-20 mm, thickness of the heat transfer plate is set at 0.1-0.35 mm, and pitch of the refrigerant channels 19, 20 is set at 1.4-3.9 mm.
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公开(公告)号：JP2000205785A
公开(公告)日：2000-07-28
申请号：JP814699
申请日：1999-01-14
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , YAMAMOTO KEN
Abstract: PROBLEM TO BE SOLVED: To easily detect the state where refrigerant passages are shortcircuitted owing to a bad contact between refrigerant passages in a heat transfer plate (state of internal leakage) in a heat exchanger where any fin is not required, required heat transfer performance is secured only with a heat transfer plate constituting a refrigerant passage, and such a fin is not required. SOLUTION: On a plurality of heat transfer plates 12a to 12c there are respectively formed a substrate section 13 and a striking section 14 protruded from the substrate section. The striking section is extended in the direction substantially perpendicular to an air stream direction A flowing outside the heat transfer plate, and refrigerant passages 19, 20 is constructed inside the striking section 14. The striking section serves as a disturbance producer that may disturb a straight advancement of the air stream to cause a disturbance, and further there is formed an internal leakage detection striking section 140 between the upstream refrigerant passage 20 and the refrigerant passage 20.
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Patent Agency Ranking
公开(公告)号：JPH11304293A
公开(公告)日：1999-11-05
申请号：JP16102898
申请日：1998-06-09
Applicant: DENSO CORP
Inventor： SHINODA TETSUSHIGE , MATSUO HIROKI , SHITAYA MASAHIRO , YAMAMOTO MICHIYASU , HASEGAWA ETSUO
Abstract: PROBLEM TO BE SOLVED: To prevent cooling performance at an overcooling part due to the swallowing of high-temperature air or the like in a refrigerant condenser with the overcooling part. SOLUTION: An overcooling part 40 is arranged at the upper portion of a core part 23 of a refrigerant condenser 2, namely at the upper portion of a condensation part 39. As a result, even if a phenomenon occurs in that high- temperature air passing through the refrigerant condenser 2 and a radiator for cooling an engine passes the lower side of the refrigerant condenser and is swallowed up at the upstream side of the refrigerant condenser again on idling when a vehicle is waiting for a signal change, the high-temperature air cannot be suched in at the installation side of the overcooling part 40. Therefore, the cooling performance of the overcooling part 40 can be maintained appropriately even on idling.
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公开(公告)号：JPH11287580A
公开(公告)日：1999-10-19
申请号：JP19207798
申请日：1998-07-07
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , YAMAUCHI YOSHIYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a heat exchanger, capable of securing necessary heat transfer performance by only heat transfer plates, constituting refrigerant passages, without necessitating any fin, such as a corrugate fin or the like. SOLUTION: A heat exchanger is constituted so that two sheets of heat transfer plates 12, having a multitude of projected parts 14, are connected under a condition that the projected parts 14 are faced outward to each other and a superposed part is provided between the projected parts 14 to constitute refrigerant passages, conducting refrigerant to flow therethrough, while air- conditioning air, flowing through the outside of the heat transfer plates 12, is conducted to flow into a direction A, orthogonal to the flow direction B of the refrigerant, whereby the projected parts 14 are employed as turbulence generators, which hinder the straight flow of airconditioning air and generate the condition of turbulent flow.
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公开(公告)号：JPH109712A
公开(公告)日：1998-01-16
申请号：JP16341296
申请日：1996-06-24
Applicant: DENSO CORP
Inventor： SHITAYA MASAHIRO , SANADA RYOICHI
Abstract: PROBLEM TO BE SOLVED: To improve heat transfer performance and easily manufacture a tube in a flat tube for a condenser. SOLUTION: On the inner wall surfaces of the two opposed flat surfaces 7a and 7b of a flat tube T, oblique grooves 7e and 7f intersecting each other are respectively provided. On the inner wall surfaces of connecting parts 7c and 7d by which both the end parts of the flat surfaces 7a and 7b in the direction of width, through grooves 7g and 7h passing through in the longitudinal direction of the tube are provided. Thus, a liquid refrigerant condensed in the tube can be smoothly discharged to the downstream side of the tube through the through grooves 7g and 7h from the oblique grooves 7e and 7f. Thus, the large quantity of liquid refrigerant is not stored in the oblique grooves 7e and 7f and a heat transfer performance can be improved. Further, the through grooves 7g and 7h are located at the positions of the connecting parts 7c and 7d so that the connecting parts 7c and 7d can be smoothly and reasonably bent. Thus, the flat tube can be easily manufactured.
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公开(公告)号：JPH09324961A
公开(公告)日：1997-12-16
申请号：JP14193096
申请日：1996-06-04
Applicant: DENSO CORP
Inventor： NAKAMURA TOMOHIKO , TORIGOE EIICHI , SHITAYA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To decrease pressure loss in the bending parts of passages between tank parts and end plates in a lamination type heat exchanger in which the tube of a heat exchanging part is formed with a lamination structure of metal thin plates. SOLUTION: The tube 2 of a heat exchanging part 3 is formed with a lamination structure in which many metal thin plates 4 are arranged in parallel. The tank parts 4c, 4d, 4g and 4h through which the fluid passages of the tube 2 communicate are formed in the longitudinal end parts of the metal thin plates 4. End plates 42 and 43 are arranged at end parts in the laminated direction of the metal thin plates of the heat exchanging part 3. Communicating passages which communicate with the tank parts 4c, 4d, 4g and 4h are formed between the end plates 42 and 43 and the metal thin plates 40 and 41 at the end parts of the heat exchanging part 3. Then, the tank parts 40a, 40b, 41b and 41d of the metal thin plates 40 and 41 are provided with inclined parts 40c and 41e for smoothing the bending parts of the passages and communicating passages.
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公开(公告)号：JPH09170850A
公开(公告)日：1997-06-30
申请号：JP18230796
申请日：1996-07-11
Applicant: DENSO CORP
Inventor： TORIGOE EIICHI , SHITAYA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To unify the diffused air temperature of the air to be diffused from a refrigerant evaporator right and left split type. SOLUTION: A plurality of down stream side evaporation flow passages of a down stream side heat exchanging part 2 and a plurality of upstream side evaporation flow passages of an upstream side heat exchanging part 3 are respectively split into two by separators 36, 27 approximately at the center part in the width direction, and the air parts difficult to cool are not lapped on each other in the longitudinal direction between the downstream side heat exchanging part 2 and the upstream side heat exchanging part 3 which are longitudinally lapped in the air flow direction by communicating a down stream lower end tank 25 with an upstream upper tank 34 through a communication passage 44. The air parts difficult to cool are symmetrical between the down stream side heat exchanging part 2 and the upstream side heat exchanging part 3, and no irregularity is generated in the diffused air temperature of the air diffused from a refrigerant evaporator 1, and the diffused air temperature distribution of the air blown out from the refrigerant evaporator 1 becomes uniform.
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