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公开(公告)号：JPS62284196A
公开(公告)日：1987-12-10
申请号：JP12751886
申请日：1986-06-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI
IPC: F28F1/30
Abstract: PURPOSE:To provide high thermal conductivity throughout a whole range from a fin on the upper stream side to a fin on the downstream side, by a method wherein, plural slit pieces risen in a direction in which a front edge part is positioned opposite to an air current are formed in a fin surface, and a reference surface, formed on the fin left non-risen between the adjoining slit pieces, is inclined based on the direction of the air current. CONSTITUTION:Fins 4 are formed between straight tube parts 1' of a flat tube 1. Slit pieces 5, secured in a waveform manner to the flat tube 1 at intervals of a specified distance, are formed on the fin 4 surface, and are risen from the fin 4 with a width C so that a front edge part 5' is positioned opposite to an air current B and a rise surface 5'' is extended in parallel to the air current B direction, and are continuously formed in the direction B. Further, a reference surface 6, left non-risen between the slit pieces 5, of the fin 4 is inclined based on the air current B direction. When heat exchange takes place between the air current B and a heating medium flowing through the flat tube 1, development of a temperature boundary layer (d) of the air current B is disconnected, and the temperature boundary layer (d), leaving a tail, can be prevented from extending to the slit piece 5 on the downstream side.
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公开(公告)号：JPS62175595A
公开(公告)日：1987-08-01
申请号：JP1519286
申请日：1986-01-27
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： YONEDA HIROSHI , KIDO OSAO , IKOMA MITSUHIRO , YAMAMOTO YOSHIAKI
Abstract: PURPOSE:To improve heat transfer performance by a method wherein flat plate type outer wall members are laminated on both surfaces of a flat plate type flow path member, consisting of a porous material and provided with a plurality of slits which become the flow path of refrigerant, to integrate them. CONSTITUTION:Three sheets of a flow path member 12 and outer wall members 14 are laminated and integrated to make a flat plate type heat transfer tube 11. In a flow path having a rectangular section, which is formed by the flow path member 12 of porous material and the outer wall members 15 and whose ratio of the width to the length thereof is considerably large, the boiling heat transfer of liquid refrigerant, flowing in a condition deviated to the short sides section of the slit, is promoted by a phenomenon that the porous part of the porous material becomes the nuclear of boiling whereby the refrigerant is evaporated and bubbles are generated. The liquid refrigerant is scattered by effect of the bubbles and the liquid refrigerant is guided to the long side sections of the slit, too, whereby heat transfer performance may be improved.
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公开(公告)号：JPS62175594A
公开(公告)日：1987-08-01
申请号：JP1519186
申请日：1986-01-27
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： YONEDA HIROSHI , KIDO OSAO , IKOMA MITSUHIRO , YAMAMOTO YOSHIAKI
Abstract: PURPOSE:To improve heat transfer performance by a method wherein flat plate type outer wall members are laminated on both surfaces of one sheet or a plurality of sheets of flow path member, provided with a plurality of slits which become the flow path of refrigerant and the inside wall surface of the slit is water repellent, to integrate them. CONSTITUTION:Water repellent surface treatment is applied on the surface of the inside walls 17 of a slit 13. A flow path member 12 and outer wall members 14 are laminated to integrate them. The flow path of refrigerant, formed by the slit 13, is provided with a rectangular shape having a large ratio of width to length and the liquid refrigerant 18 flows in the flow path of the refrigerant while being held by the long side sections of the slit without being deviated to the short side sections of the flow path of refrigerant too much by the effects of a surface tension and a contacting angle (water repellent surface) since the surface of the inside wall 17 of the flow path is water repellent. Accordingly, evaporating heat transfer is improved and heat transfer performance may be improved remarkably.
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公开(公告)号：JPS62175593A
公开(公告)日：1987-08-01
申请号：JP1519086
申请日：1986-01-27
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： YONEDA HIROSHI , KIDO OSAO , IKOMA MITSUHIRO , YAMAMOTO YOSHIAKI
Abstract: PURPOSE:To improve heat transfer performance by a method wherein flat plate type outer wall members are laminated on both surfaces of a flat plate type flow path member provided with a plurality of slits which become the flow path of refrigerant and a plurality of protuberances which narrow the width of the slit on the way thereof to integrate them. CONSTITUTION:A plurality of slits 13, which become the flow path of refrigerant, are provided in parallel on a flat type flow path member 12 while the slit 13 is provided with a plurality of protuberances 17 so as to narrow the width thereof on the way of the flow path. A flat plate type heat transfer tube 11 is constituted by laminating and integrating three sheets of the flow path member 12 and the outer wall member 14. When refrigerant is flowing into the direction of an arrow sign in a diagram, the flow of the liquid refrigerant 18, which is deviated by the protuberances 17, is separated once from a side wall and is guided to the center of the long side of the protuberances. Such deviations are caused in every plural protuberances 17 and the flow of the liquid refrigerant 18, which is apt to be deviated to the short sides thereof, is guided to the long side part and dry-out in the long side part is eliminated whereby evaporating heat transfer is improved and heat transfer performance may be improve remarkably.
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公开(公告)号：JPS62112989A
公开(公告)日：1987-05-23
申请号：JP25147585
申请日：1985-11-08
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI
Abstract: PURPOSE:To obtain a high heat-exchanging capability on the average without any lowering in heat transfer rate on the downstream side, by dividing a flat tube and fins in a gas flow direction, and so setting the flat tubes in adjacent rows in the gas flow direction as to intersect as viewed in the gas flow direction. CONSTITUTION:Heat is exchanged between a gas flow B passing between louver fins 5 and a heat-transmitting medium branched by a header 6 and flowing through flat tubes 4, through the fins 5 and the flat tubes 4. In this case, temperature boundary layers of the gas flow B are developed on the surfaces of the fins 5 and the tubes 4. Since the layers are developed in one direction on the tubes in the row on the upstream side and in another direction on the tubes in the row on the downstream side, the temperature boundary layers are completely split between the rows of the tubes. Therefore, the temperature boundary layer is newly developed starting from leading edge parts of he fins 5b and the tubes 4b on the downstream side, and a high heat transfer rate comparable to that on the upstream side can be obtained for the row on the downstream side.
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Patent Agency Ranking
公开(公告)号：JPS6219693A
公开(公告)日：1987-01-28
申请号：JP15904585
申请日：1985-07-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： YONEDA HIROSHI , KIDO OSAO
Abstract: PURPOSE:To provide a finned heat exchanger in which the heat-exchange capacity is secured at the time of frosting and further the operation continuing time is long by separating the front edge portion on the upstream side of the airstream of the inter heat transfer tube portion of fins from the front edge portion on the upstream side of the airstream of the heat transfer tube, and forming the front edge portion on the upstream side of the airstream of the inter heat transfer tube of fins into concave and convex surfaces. CONSTITUTION:Fins 11 are aligned at a predetermined interval in parallel to each other to form a fin group 12, and heat transfer tubes 13 are inserted into the fin group 12 at a right angle. The airstream upstream side front edge portion 15 between heat transfer tubes 13 of fins 11 are separated from the airstream upstream side front edge portion 16. Further, the front edge portion 15 is formed into a corrugated shape. The airstream flows toward a direction B, and is disturbed by the corrugated front edge portion 15, and the heat transfer rate and heat exchange capacity are improved. Under frosting conditions where the evaporation temperature is 0 deg.C or less, the front edge portion 15 is separated from the corrugated front edge portion 16 whereby the surface temperature of the corrugated front edge portion 16 rises up and frosting becomes difficult. On the rearstream side, the heat transfer is promoted by the turbulence promoting effect, and hence frosting is made easy. Therefore, relatively uniform frosting can be realized and even if it frosts, the vent passage is secured.
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公开(公告)号：JPS61153387A
公开(公告)日：1986-07-12
申请号：JP27757484
申请日：1984-12-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI , TANNO SATOSHI , KOMA HACHIRO , SUGA HIROAKI
IPC: F28F1/12
Abstract: PURPOSE:To improve the heat transfer property of a single flat tube heat exchanger by a method wherein the heat exchanger consists of a flat tube, to the surface of which a large number of pins are planted vertically so as to give strong turbulence to the air stream flowing among the group of the pins by the pins in order to develop a large quantity of heat transfer between the pins and the air stream. CONSTITUTION:Heat is exchanged between air stream B flowing among pins 5 and the flow in a flat tube 3. In this case, a large quantity of heat transfer is realized between the pins 5 and the air stream B, because the air stream B is given turbulence by the pins 5 and the pin 5 has almost no thick boundary layer, which develops in a flat plate fin and hinders the heat transfer. In addition, the staggered arrangement of the pins onto the flat tube 3 gives far more turbulence to the air stream B, resulting in giving the improving effect for remarkably large heat transfer. Furthermore, because the pin 5 has a circular column form, no re-straightening of the air stream B by the pin 5, which occurs by a flat fin in such a manner that the flat fin straightens again the air stream given turbulence by a heat transfer medium tube, occurs.
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公开(公告)号：JPS61147096A
公开(公告)日：1986-07-04
申请号：JP26980884
申请日：1984-12-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： SUGA HIROAKI , KOMA HACHIRO , TANNO SATOSHI , YONEDA HIROSHI , KIDO OSAO
IPC: F28F1/34
Abstract: PURPOSE:To secure the quantity of ventilation and to maintain the cooling performance under a condition where frost is generated, by constituting the cooler of plate fins disposed in a large number and coolant pipes penetrating through the fins, and disposing these fins so that the distances between the end portions of neighboring fins are different from each other. CONSTITUTION:A cooler 1 is constituted of plate fins disposed in a large number and coolant pipes 3 penetrating therethrough. The plate fins 2 are made of aluminum having a good thermal conductivity, and are disposed in a trancated chevron-shaped so that the distances between end portions of neighboring fins 2 are different, and a portion (A) having a narrow interval, and a portion (B) having a wide interval, are formed between neighboring fins 2. According to this construction, even when the cooler is used under a condition where frost is generated, the ventilation quantity can be secured at the portion (B) having a wide fin interval to maintain the cooling performance at the time of frosting. Further, by alternately disposing portions (A) and portions (B) with respect to the axial direction of the coolant pipe 3 and the air flow direction, ventilation at the portions (B) can be secured even if the portions A are clogged with frost.
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公开(公告)号：JPS60235995A
公开(公告)日：1985-11-22
申请号：JP9345384
申请日：1984-05-10
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI , TANNO SATOSHI , KOMA HACHIROU , SUGA HIROAKI
IPC: F28F1/32
Abstract: PURPOSE:To contrive a higher heat exchanger performance without reducing a turbulent flow accelerating effect produced by a refrigerant pipe, by a construction wherein the cutting and raising direction of cut-and-raised pieces provided on plate form fins is set to accord with the stream line direction of air flow in the vicinity of a refrigerant pipe. CONSTITUTION:Since the plate form fins 5 are divided by the cut-and-raised pieces 7, enhancement of the coefficient of heat transfer can be contrived through a boundary-layer leading edge effect, and since the stream line direction 8 of air flow accords with the direction of the cut-and-raised piece 7 at the position of each of the pieces 7, the direction of the stream line 8 is not changed by the pieces 7, and the turbulence of air flows generated by the refrigerant pipes 6 is maintained, so that the turbulence accelerating effect is not reduced. Accordingly, the coefficient heat transfer is markedly enhanced by the boundary- layer leading edge effect produced by providing the fins 5 with the pieces 7, and the turbulent flow accelerating effect is not reduced through straightening of the turbulence of the air flows generated by the refrigerant pipes 6, so that a marked increase in coefficient of heat transfer can be contrived.
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公开(公告)号：JPS60181570A
公开(公告)日：1985-09-17
申请号：JP3645184
申请日：1984-02-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： YONEDA HIROSHI , KIDO OSAO , TANNO SATOSHI , KOMA HACHIROU , KAN HIROAKI
IPC: F25D21/08
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