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    HEAT EXCHANGER
    3.
    发明专利
    HEAT EXCHANGER 失效

    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.

    MANUFACTURE OF SHEET FINNED HEAT EXCHANGER
    6.
    发明专利
    MANUFACTURE OF SHEET FINNED HEAT EXCHANGER 失效

    公开(公告)号：JPS59220235A

    公开(公告)日：1984-12-11

    申请号：JP9634983

    申请日：1983-05-30

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： KOMA HACHIROU ,  AOKI YUUKICHI ,  TANNO SATOSHI ,  ITOU HIRONORI ,  YONEDA HIROSHI ,  AOYAMA SHIGEO

    IPC: B21D53/08 ,  B23P19/02 ,  F25B39/02 ,  F28F1/32

    Abstract: PURPOSE:To improve efficiency of a heat exchanger and make the structure free from torsion defect by bending a refrigerant pipe having sheet fins zigzag, holding the bent part of the pipe with a jig, and making the pipe zigzag by twisting between sheet fins through spacers. CONSTITUTION:A refrigerant pipe 5 to which many sheet fins 4 are fitted at specified interval is bent zigzag. Then, spacers 11 having thickness Po of specified interval of fins are interposed between fins 4. Curved parts 10 of the pipe are held by a holder 13 and pipe straight part 5 is twisted by turning a motor 14. The sheet fins are slid on the pipe by spacers 11 to become spacer interval Po and the height is made uniform. As twisting of the pipe 5 is made in long straight part, deformation and cracks do not occur. The heat exchanger is high in heat exchange efficiency due to zigzag arrangement of pipes and no defect due to working occurs.

    HEAT EXCHANGER
    7.
    发明专利
    HEAT EXCHANGER 失效

    公开(公告)号：JPS60251394A

    公开(公告)日：1985-12-12

    申请号：JP10784584

    申请日：1984-05-28

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： KIDO OSAO ,  YONEDA HIROSHI ,  TANNO SATOSHI ,  KOMA HACHIROU ,  KAN HIROAKI

    IPC: F28F1/32

    Abstract: PURPOSE:To improve heat transfer coefficient by a method wherein the heat exchanger is constituted of a number of parallel small fin pieces and a heat medium pipe penetrating through the small fin pieces while at least one end of the inlet side or the outlet side of airflow of the small fin pieces are provided with a number of twisted pieces separately. CONSTITUTION:The small fin pieces 3, provided with the twisted pieces 4, are arranged on the heat medium pipe 2 in parallel with predetermined pitches. The number of twisted pieces 4, provided on the small fin pieces 3, are arranged separately on both ends of inlet and outlet sides of airflow so that the directions thereof coincide with the direction of the airflow A. The heat medium flows through the heat medium pipe 2 and heat exchange between the heat medium and air is effected utilizing the heat medium pipe 2 and the small fin pieces 3 as heat transfer surfaces since the air flows between the small fin pieces 3 on the outside of the pipe 2. In this case, eddy-like disturbance is generated in the airflow, flowing between the small fin pieces 3, and turbulent flow promoting effect may be obtained remarkably thereby improving the heat transfer coefficient.

    HEAT EXCHANGER
    8.
    发明专利
    HEAT EXCHANGER 失效

    公开(公告)号：JPS608696A

    公开(公告)日：1985-01-17

    申请号：JP11633783

    申请日：1983-06-27

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： AOYAMA SHIGEO ,  YONEDA HIROSHI ,  TANNO SATOSHI ,  KOMA HACHIROU

    IPC: F28F1/32

    Abstract: PURPOSE:To shorten the needed length of a refrigerant tube, by enabling bend parts of a tube also to exchange heat, by providing plate fins which are continuous toward the flowing direction of the air, to the bend parts of a refrigerant tube. CONSTITUTION:A certain number of plate fins 3a and 3b which are continuous toward the flowing direction of the air are provided to the bend parts 4b of a refrigerant tube 4, and end plates 5 are provided at both ends of the fins 3a and 3b, at the ends of bend parts 4b, located within the width of tube diameter. Heat can be exchanged also in the bend parts 4b, by providing plate fins 3a and 3b which are not divided by the bend parts 4b of a refrigerant tube. As a result, the needed length of a refrigerant tube can be shortened, large heat transfer surface can be taken, and the heat exchanging rate can be increased, that is, the heat exchanging capacity can be increased. In addition, assembling ability of a heat exchanger can be increased, because temporary assembly can be performed by the presence of plate fins 3a and 3b, when the end plates 5 are installed to the fins.

    PRODUCTION OF PLATE-FINNED HEAT EXCHANGER
    9.
    发明专利
    PRODUCTION OF PLATE-FINNED HEAT EXCHANGER 失效

    公开(公告)号：JPS59225834A

    公开(公告)日：1984-12-18

    申请号：JP10114483

    申请日：1983-06-06

    Applicant: MATSUSHITA REFRIGERATION

    Inventor： ITOU HIRONORI ,  TANNO SATOSHI ,  AOKI YUUKICHI ,  KOMA HACHIROU

    IPC: B21D53/08 ,  F28F1/32

    Abstract: PURPOSE:To obtain inexpensively a product having good performance by upsetting and disposing the plate fins each provided with two pipe holes in deviated positions in each row unit, passing refrigerant pipes into the respective holes and fitting tightly and fixing the pipes to the fins then subjecting the fins and pipes to spiral bending and twisting thereby forming the same into a zigzag shape. CONSTITUTION:Fins 10 each punched with two holes 12 in the positions deviated from the center are upset and arranged in each row unit. Pipes 11 are fitted tightly and fixed by expansion onto the holes 12 and the bent parts 13 of the pipes are set between guides 24 and 25 and are clamped to the small diameter part 15b of a die 15 by the groove 19a of a bending head 10. While the head 19 is rotated 180 deg. by a rotative driving part 17, the head 19 is descended by a diagonal tapered guide 15c of the die 15 and at the same time a guide 25 is rotated along a rail 27 to apply bend and twist to the bent parts 13, by which a finned heat exchanger arranged zigzag with the pipes 11 is obtd. The performance of the titled heat exchanger is thus improved and the man-hour for working is considerably reduced.

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