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    HEAT EXCHANGER
    45.
    发明专利
    HEAT EXCHANGER 失效

    公开(公告)号：JPS62284197A

    公开(公告)日：1987-12-10

    申请号：JP12752786

    申请日：1986-06-02

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： KIDO OSAO ,  YONEDA HIROSHI ,  AOYAMA SHIGEO

    IPC: F28F1/30 ,  F28D1/047 ,  F28F1/12

    Abstract: PURPOSE:To prevent lowering of thermal conductivity between a fin and an air current even in a heat exchanger being long in an air current direction, by a method wherein, slit pieces, each having a front edge part positioned opposite to an air current, are formed in a parted state on a fin surface in two or more rows in a vertical direction to an air current, and the leg part of the slit piece is inclined based on an air current direction. CONSTITUTION:Fins 4 are positioned between straight tube parts 1', positioned facing each other, of a flat tube 1, and are secured in a wavefrom manner at intervals of a specified distance to the flat tube 1. Slit piece 5 are formed on the fin 4 surface so that a front edge part 5' extends vertically to an air flow B, and are parted in two or rows in a vertical direction to the air flow B. A leg part 5'', produced resulting from parting, is inclined based on the air flow B direction, and the leg parts 5'' are arranged in a mandering manner in the air current B direction. When heat exchange takes place between the air flow B and a heating medium flowing through the flat tube 1, the temperature boundary layer of the air current B, formed on the fin 4 surface, is parted by the slit pieces 5, the air flow B flows in a mandering manner on the fin 4 surface by means of the leg parts 5'', and a turbulence promoting effect is produced occasioned by production of an eddy current by virtue of the wake flow of the leg part 5''.

    HEAT EXCHANGER
    46.
    发明专利
    HEAT EXCHANGER 失效

    公开(公告)号：JPS62284195A

    公开(公告)日：1987-12-10

    申请号：JP12751686

    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 of from a fin on the upper stream side to a fin on the downstream side, by a method wherein, a front edge part is positioned opposite to an air current, a slit piece, having a rise surface inclined based on the direction of an air current, is risen from a fin surface, and the reference surface, which is left non-risen, of the fin is inclined based on the direction of an air current. CONSTITUTION:Fins 4 are situated between straight tube 1' of a flat tube 1, and are secured in a waveform manner to the flat tube 1 at intervals of a specified distance. The slit piece 5 is formed by rise from the surface of the fin 4, a front edge part 5' is positioned opposite to an air current direction B, a rise surface 5'' is inclined at a specified angle theta with the air current direction B, and the slit pieces 5, each having a width C, are continuously formed. Further, a reference surface 6, positioned between the slit pieces 5 and left non-risen, of the fin 4 is also formed so as to have a specified angle theta with the direction B and a width C. 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), formed on the surface of the fin 4, of the air current B is disconnected, and the boundary layer (d), leaving a tail, is prevente from extending to the slit piece 5 and the reference surface 6 on the downstream side.

    HEAT EXCHANGER WITH FIN
    47.
    发明专利
    HEAT EXCHANGER WITH FIN 失效

    公开(公告)号：JPS62258997A

    公开(公告)日：1987-11-11

    申请号：JP9052686

    申请日：1986-04-18

    Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

    Inventor： TANAKA HIROYOSHI ,  ANDO TOMOAKI ,  OBATA MAKOTO ,  YONEDA HIROSHI ,  KOMA HACHIRO

    IPC: F28F1/32 ,  F25B39/02 ,  F28F13/04

    Abstract: PURPOSE:To prevent the occurrence of closing due to formation of frost at a tip, by a method wherein a distance between a heat transfer pipe in a frontmost row and the tip of a fin is increased over that between a heat transfer pipe in a rearmost row and the rear end of the fin, and a plurality of pores are formed in a plurality of rows in a position in the vicinity of the tip of the fin. CONSTITUTION:Air 8 imparts heat through the surfaces of a fin 5 and a fin collar 6 or the surface of a steel pipe 7 to refrigerant and is cooled. In this case, steam in the air 8 is condensed, and is adhered as water to the surface of a fin 5 or a fin collar 6, and in case, when adhered, a metal surface is cooled down to 0 deg.C or less, the water is momentarily condensed to form frost. However, since the tip of the fin of an air 8 inflow part is expanded in a manner that X is longer than Y and a number of pores 9 are formed in a plurality of rows, the flow of heat from the steel pipe 7 to the tip is impeded, a fin temperature is increased due to lowering of fin efficiency at the tip part of the fin, and an amount of frost formed to the tip part can be decreased.

    HEAT TRANSFER PIPE
    48.
    发明专利
    HEAT TRANSFER PIPE 失效

    公开(公告)号：JPS62178894A

    公开(公告)日：1987-08-05

    申请号：JP2147386

    申请日：1986-02-03

    Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

    Inventor： YONEDA HIROSHI ,  KIDO OSAO ,  IKOMA MITSUHIRO ,  YAMAMOTO YOSHIAKI

    IPC: F28F1/02 ,  F28F1/40 ,  F28F3/06 ,  F28F3/12

    Abstract: PURPOSE:To promote the transfer of evaporation heat thereby to improve the heat transfer performance of the heat transfer pipe by superimposing a flat flowpath member provided with a plurality of wide slits forming a part of respective coolant flowpaths at portions corresponding to a plurality of narrow slits, on both surfaces of a flat flowpath member provided with narrow slits forming a part of the coolant flowpaths, and further integrally laminating outer flat wall members on said both surfaces. CONSTITUTION:A plurality of narrow slits 13 forming a part of coolant flowpaths are provided in parallel in a flowpath member 12. On both surfaces of the flowpath member 12, a flowpath member 14 provided with a plurality of wide slits 15 forming a part of coolant flowpaths at portions corresponding to narrow slits 13 is superimposed. The coolant flowpaths formed by slits 13 and 15 of respective flowpath members 12 and 14 assumes a flat I type, in which minute clearances are increased to four portions, a liquid coolant is held by the effect of the surface tension of the liquid coolant 19 and circulates, and the lower part of the flowpath assumes a jar shape section. Therefore, the hollow part of the flowpath promotes the generation of boiling nuclcus, and thus the evaporation heat transfer is promoted and the heat transfer performance is remarkably improved.

    HEAT TRANSFER PIPE
    49.
    发明专利
    HEAT TRANSFER PIPE 失效

    公开(公告)号：JPS62178891A

    公开(公告)日：1987-08-05

    申请号：JP2147586

    申请日：1986-02-03

    Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

    Inventor： YONEDA HIROSHI ,  KIDO OSAO ,  IKOMA MITSUHIRO ,  YAMAMOTO YOSHIAKI

    IPC: F28F1/02 ,  F28F1/40 ,  F28F3/02 ,  F28F3/12

    Abstract: PURPOSE:To cause a liquid coolant to flow at the long side portion of a rectangular flowpath having a considerably large aspect ratio thereby to improve the heat transfer performance of the pipe by providing projected portions so that the thickness of slits is reduced in opposition to the vicinities of the central portions of a plurality of slits, at least in either of flat outer wall members provided on both surfaces of flat flowpath members provided with a plurality of slits used as coolant flowpaths. CONSTITUTION:A flowpath member 12 is provided with a plurality of parallel slits 13 used as coolant flowpaths. Projected portion 18 are formed by a press or the like on the side facing slits 13 in the vicinities of the central portions of respective slit widths at portions corresponding to a plurality of slits 13 provided in the flowpath member 12 in outer wall members 14. The coolant flowpath formed by the slit 13 is a rectangle having a large aspect ratio, and the flowpath thickness (height) of the center of the long side portion is smaller than that of the short side portion. Accordingly, since a liquid coolant 19 flows while being held at the center of the long side portion within the coolant flowpath by the effect of the surface tension, the evaporation heat transfer is improved and the heat transfer performance is remarkably improved.

    HEAT EXCHANGER
    50.
    发明专利
    HEAT EXCHANGER 失效

    公开(公告)号：JPS62172192A

    公开(公告)日：1987-07-29

    申请号：JP1516686

    申请日：1986-01-27

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： KIDO OSAO ,  YONEDA HIROSHI

    IPC: F28F1/30 ,  F28F1/12

    Abstract: PURPOSE:To obtain high heat transfer rate between a fin and airflow by a method wherein a slit piece, whose fore rim is opposed to airflow, is provided on the surface of the fin and raised-slotted surfaces, forming the slit piece, is formed by a parallel surface and a slanted surface to the fin. CONSTITUTION:A slit piece 5, provided on the surface of a fin 4, is provided so that the fore rim 5a thereof is opposed to airflow B. Accordingly, the development of the temperature boundary layer of the airflow B, which is generated on the surface of the fin 4, is divided by the slit piece 5 and the average thickness of the temperature boundary layer becomes thin. On the other hand, the airflow B, flowing along both surfaces of the fin 4, is mixed orthogonally to the fin 4 by the slanted surface 5c'' of a raised-slotted surface 5c of the slit piece 5 while the airflow B is disturbed highly in a direction along the surface of the fin 4 by the slanted surface 5c'' arranged in zigzag. Thus, a very high heat transfer rate may be obtained between the airflow B and the fin 4 and, further, the heat transfer rate will never be deteriorated even in a heat exchanger, long in the direction of the airflow B, even while flowing to the downstream side of the heat exchanger.

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