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公开(公告)号：JP2003121085A
公开(公告)日：2003-04-23
申请号：JP2001313459
申请日：2001-10-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI
Abstract: PROBLEM TO BE SOLVED: To provide a heat exchanger compatibly attaining a high defrosting efficiency and an effective use of a storage space, to provide a heat exchange unit including a defrosting heater, and to provide a cooling storage such as a refrigerator having them. SOLUTION: This heat exchanger 18 is so formed that multiple rows and stages of fin blocks are formed by bending fin groups, which is formed by penetrating and fixing multiple independent planar fins 22 through/to a heat transfer pipe 21, into a measuring state and that the projection cross sectional shape of the fin block perpendicular to the pipe shaft direction of the heat transfer pipe 21 is formed by removing the fin block in a corner part from the rectangular external shape. A radiation heater 23 is disposed in a part formed by removing the fin block of the heat exchanger 18 so that two sides of the fin blocks face to the radiation heater 23, which can improve the defrosting efficiency and save the space by incorporating the installation space for the radiation heater 23 in the external shape of the heat exchanger 18.
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公开(公告)号：JP2001330380A
公开(公告)日：2001-11-30
申请号：JP2000154214
申请日：2000-05-25
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI , SUNADA MASAKI
Abstract: PROBLEM TO BE SOLVED: To solve the problems of a conventional heat exchanger with serpentine flow paths such that there is necessity to flatten a curved pipe section, pressing a heat conductive pipe 4 from four directions, when flattening the curved pipe section, and a flattening jig has complicated structure, and the manhour in processing increases, and that a thick heat conductive pipe needs to be used in order to avoid the deformation at flattening processing. SOLUTION: It is possible to flatten a curved pipe section, pressing it from two directions, by limiting the scope of flattening the curved pipe section, and it is possible to simplify the structure of a jig, and the manhour can be reduced, too. Moreover, since the flatness can be reduced by tapering the flat part, a thin heat conductive pipe can be used.
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公开(公告)号：JPH11118302A
公开(公告)日：1999-04-30
申请号：JP28173697
申请日：1997-10-15
Applicant: MATSUSHITA REFRIGERATION
Inventor： INABA HIDEO , IMAI SEISHI
Abstract: PROBLEM TO BE SOLVED: To reduce the time required for removing frost during the defrosting operation using an air jet in an air cooler with a deposited frost layer. SOLUTION: The cooler comprises arranged lines of heat transfer pipes for flowing a coolant inside, heat exchanger composed of heat transfer pipes lying in their lengths with mutual spacings, jet flow feeder having rectangular or circular nozzles 1 for feeding a jet air colliding against the heat exchanger 3, and heater for irradiating a radiation energy on the heat exchanger 3. This increases the vapor mass concn. difference between a main air flow and frost layer surface even when a high dew-point air is fed, thereby improving the sublimation evaporation defrost.
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公开(公告)号：JP2001124479A
公开(公告)日：2001-05-11
申请号：JP30505999
申请日：1999-10-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI , ITO HIRONORI , MIZUTA YUKIO
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing heat exchanger by which a heat exchanger can be cut without deforming fins by suppressing the tolerance of the cut face to a low value by eliminating the disadvantage of the conventional method that the fins are deformed and the finished tolerance of the product becomes larger at the time of cutting the fins. SOLUTION: In a method for manufacturing heat exchanger, a heat exchanger constituted of a heat transfer tube and plate-like fins can be cut with a small tolerance by hardly deforming the fins by cutting the exchanger in such a way that the cutting length is increased in steps and the cutting edge is set at a fixed angle from the fins.
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公开(公告)号：JP2000018776A
公开(公告)日：2000-01-18
申请号：JP18727998
申请日：1998-07-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI
Abstract: PROBLEM TO BE SOLVED: To realize an operating state where frost does not adhere. SOLUTION: This evaporator comprises a heat exchanger having heating tubes 1a for passing refrigerant arranged in a plurality of rows and a large number of planar fins 1b stacked at an interval in the axial direction of the heating tube 1a while passing the heating tubes 1a fixedly, and a magnetron 2 for radiating microwave to the heat exchanger 1. According to the structure, only steam molecules in wet air, i.e., outer air flow 3, can be heated selectively and adhesion of frost to the heat exchanger 1 can be suppressed efficiently resulting in frost free state.
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Patent Agency Ranking
公开(公告)号：JPH11304388A
公开(公告)日：1999-11-05
申请号：JP11047998
申请日：1998-04-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI , TAIRA TERUHIKO
IPC: F28F1/32
Abstract: PROBLEM TO BE SOLVED: To provide a heat exchanger for the outdoor unit of a heat pump type air conditioner in which resistance against frosting is enhanced by retarding clogging of a wind path due to frosting. SOLUTION: Planar fins 12 are arranged such that two arbitrary planar fins 12 adjacent in the axial direction of a heating tube 11 are raised alternately in the opposite directions. Even after an air channel having a raised piece between the bases of the planar fin 12 is clogged, air flows through an air channel having no raised piece between the bases of the planar tin 12. Consequently, heat is exchanged between the air and the refrigerant and heat exchanging capacity can be sustained.
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公开(公告)号：JPH06117789A
公开(公告)日：1994-04-28
申请号：JP26454592
申请日：1992-10-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI , NAKAYAMA KOICHI , KATO KAORU , KASE HIROAKI , TAIRA TERUHIKO , KOGASHIWA NAOYUKI
IPC: F28F1/32
Abstract: PURPOSE:To prevent a lowering of the performance due to frosting by composing a heat exchanger of many fins disposed in parallel and heat transfer tubes inserted perpendicularly to the fins in such a manner that a lower part of each fin is formed as a water repellent surface and an upper part is formed as a hydrophilic surface. CONSTITUTION:A heat exchanger comprises many fins 11 disposed in parallel, and heat transfer tubes inserted perpendicularly to the fins 11 in such a manner that a lower part of each fin 11 is formed as a water repellent surface 11A and an upper part is formed as a hydrophilic surface 11B. When a temperature of the atmosphere 15 is relatively high, the lower parts of the fins 11 are formed as the water repellent surfaces 11A and the upper parts are formed as the hydrophilic surfaces 11B thereby to improve hydro-extraction of the exchanger and to reduce a ventilation resistance. When the temperature of the atmosphere is very low, a room heating time can be prolonged by a frost delaying effect of the surface 11A at the time of room heating due to the fact that the lower parts of the fins 11 are the water repellent surfaces 11A. Since the upper parts of the fins are the hydrophilic surfaces 11A, water droplets of the surfaces 11A are rapidly removed at the time of defrosting to finish the defrosting in a short time.
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公开(公告)号：JPH06123586A
公开(公告)日：1994-05-06
申请号：JP27405692
申请日：1992-10-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： IMAI SEISHI , KASE HIROAKI
Abstract: PURPOSE:To prevent a sudden change in the pressure of a heating medium by a method wherein the opening face of a capillary tube on the exit side of the heating medium is cut obliquely to the direction of the axis of the tube. CONSTITUTION:On the occasion when a heating medium A flowing through a capillary tube 11 is discharged into a joint pipe 12, it passes through the opening face 11a on the exit side of the capillary tube cut obliquely to the center line 14b of the capillary tube. Since the opening face 11a on the exit side of the capillary tube is cut obliquely to the center line 14a of the pipe according to this constitution, expansion of the section of the heating medium A becomes gentle on the occasion when it is discharged into the joint pipe 12. Accordingly, a sudden drop of the pressure of the heating medium A can be slowed down and a turbulent flow in the joint pipe 12 can be suppressed. Therefore the flow of the heating medium A becomes stable and generation of a sound of the heating medium can be reduced.
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公开(公告)号：JP2003220435A
公开(公告)日：2003-08-05
申请号：JP2002015063
申请日：2002-01-24
Applicant: MATSUSHITA REFRIGERATION
Inventor： SUNAHATA TAKUMI , ITO HIRONORI , IMAI SEISHI
Abstract: PROBLEM TO BE SOLVED: To realize the optimization of the ratio between the inner area and the outer area of an heat exchanger and the minimization of material cost in accordance with the use situation thereof, and also to suppress the cost of die facility drastically. SOLUTION: In a process for forming the plate-form fin 12 of a fin and tube heat exchanger, the positions for forming through holes of the fin 12 can be changed. The width of the plurality of the fins 12 can be formed with respect to the number of rows of heat-transfer tubes 11, thus the surface area of the heat exchanger and the width dimension of the fin thereof can be adjusted. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2001317854A
公开(公告)日：2001-11-16
申请号：JP2000134596
申请日：2000-05-08
Applicant: MATSUSHITA REFRIGERATION
Inventor： SUNADA MASAKI , IMAI SEISHI
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator with a large inner volume by reducing the size of an evaporator in a refrigerating chamber. SOLUTION: An evaporator 5 of a refrigerating chamber is a fin-tube evaporator constituted of a plurality of refrigerant tubes 22 and a plurality of plate fins 21 arranged parallel with each other. Since a distance P between the plate fins is set at most 3 mm, the evaporator 5 is improved in cooling capacity for cooling the refrigerating chamber to a prescribed temperature. Thus, the evaporator 5 can be downsized, and the inner volume of the refrigerating chamber can be increased.
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