公开(公告)号：JPS63172891A

公开(公告)日：1988-07-16

申请号：JP450187

申请日：1987-01-12

Applicant: MATSUSHITA REFRIGERATION

Inventor： AOYAMA SHIGEO ,  FUJIMOTO SHINJI

IPC: F28F1/04 ,  F28F1/40

Abstract: PURPOSE:To improve the heat transfer performance in a heat transfer pipe by making the cross section of the flow channel in the heat transfer pipe rectangular in the areas from the supercooled area to the low dryness area and from the high dryness area to the superheated area and circular in the medium dryness area of fluid in the pipe. CONSTITUTION:In the supercooled area and the low dryness area (for instance, dryness x =0.9) of the coolant in a pipe, the coolant is considered to be almost liquid phase and almost gas phase respectively, that is, close to a single phase flow. In this case a rectangular flow channel 10a has improved heat transfer performance in the pipe than a circular flow channel 10b. Further, in the inner wall of the heat transfer pipe 10a grooves 13a which have a triangle cross section are provided by cutting in the grooves. With those grooves the heat transfer area is increased with improved heat transfer performance. And, because in the middle dryness area of the coolant in the pipe (for instance 0.3

公开(公告)号：JPS63163788A

公开(公告)日：1988-07-07

申请号：JP31234486

申请日：1986-12-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDO OSAO ,  FUJIMOTO SHINJI ,  KOMA HACHIRO ,  IDE SHINICHI

IPC: F28F1/30 ,  F28D1/053 ,  F28F1/12

Abstract: PURPOSE:To increase the heat transfer coefficient of a fin to an air flow, by raising louvers, which are continuous in the direction of an air flow, from both sides of a fin alternately on each side, by reversing the inclination of louvers to the direction of an air flow from one side of a fin to another, and by determining the inclination of them at a specified angle. CONSTITUTION:Louvers 5 are provided on both of a fin 4, alternately on each side in the direction of an air flow B. The height HL of a raised face 6 raised from the surface of a fin 4 is obtained by keeping the raised face 6 at the inclined angle thetaof 30-35 deg. to the direction of an air flow B. The inclination of a raised face 6a on the upper surface of a fin 4 to the direction of an air flow B is reversed from that of a raised face 6b on the under surface of a fin 4. With such an arrangement the boundary layer of temperature in the air flow produced on the raised faces 6 does not leave a trail long to the downstream side, because the air flow B flows staggeredly among the raised faces 6 in regard to the air flow B which flows through the inside of a fin 4 and a heating medium which flows through the inside of a flat pipe. The heat transfer coefficient of a fin 4 to the air flow B can be kept high also from the upstream side to the downstream side of high air velocity zone; as a result, the heat transferring capacity of a heat exchanger can be increased.

公开(公告)号：JPS63150586A

公开(公告)日：1988-06-23

申请号：JP29955086

申请日：1986-12-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDO OSAO ,  FUJIMOTO SHINJI ,  KOMA HACHIRO ,  IDE SHINICHI

IPC: F28F1/30 ,  F28D1/053 ,  F28F1/12 ,  F28F1/32

Abstract: PURPOSE:To improve heat transfer performance by a method wherein bridge- shaped slit pieces are out and raised from a fin surface, and their out and raised surfaces are inclined to an air flow direction, and the inclination direction of the cut and raised surfaces and the stepwise inclination direction of cut and raised heights are reversed to each other. CONSTITUTION:Bridge-shaped slit pieces 5 are cut and raised from a fin 4 surface in three steps and cut and raised heights Hs are installed stepwise with inclination to an air flow direction B. Cut and raised surfaces 6 are also inclined to the direction B. The inclination direction of the cut and raised surfaces 6 and the stepwise inclination direction the cut and raised heights Hs are reversed to each other. As an initial size, the cut and raised height Hs of the slit 5 is made to be one third of a fin pitch Pf. Further, a relation among a inclination angle theta between the surface 6 and the direction B, the fin pitch Pf, and a slit width Ws is determined as theta lam (Pf/Ws/15). Thereby, the temp. boundary layer of the air flow B is completely divided into parts, and a heat transfer rate between the fins 4 and the air flow B from the upstream side to the downstream side is maintained at an extremely high level, and heat transfer performance can be improved.

公开(公告)号：JPS63101698A

公开(公告)日：1988-05-06

申请号：JP24783486

申请日：1986-10-17

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： KUSUHARA HISAO ,  OBATA MAKOTO ,  NISHIWAKI FUMITOSHI ,  FUJIMOTO SHINJI ,  KATO KAORU

IPC: F28F1/32

Abstract: PURPOSE:To provide a heat exchanger with a fin having high performance, by a method wherein heat transfer tubes are non-linearly arranged in the direction of an air flow to form one row, a plurality of trains of the heat transfer tubes are arranged in a direction crossing an air flow, a rise is formed in a fin part positioned between the heat transfer tube trains, and the heat transfer tube in each train is partially overlapped with the projection surface of the adjoining heat transfer tube. CONSTITUTION:A coolant flows through copper tubes 9a, 9b, 9c, and 9d, the heat passed by the coolant is transferred, in order, to a copper tube 9, a fin collar 10, a fin 11, and a cut rise 12. Meanwhile, when an air flow 13 flows between the fins, heat transferred from the coolant is exchanged. The copper tubes 9b and 9c are disposed so that only the half thereof is overlapped with a projection surface 14 of the copper tube 9a situated on the upper stream side of an air flow, and the copper tube 9d is situated in a position allowing the copper tube to be totally superposed with the projection surface 14. A slit-form cut rise 12 has a leg part 12a, connected to the fin 11, which is situated at an inclination angle with the direction of the air flow 13. This constitution provides a uniform flow running between the heat transfer tubes and a heat transfer rate almost equal to a theoretical value.

公开(公告)号：JPS6365299A

公开(公告)日：1988-03-23

申请号：JP20991886

申请日：1986-09-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDO OSAO ,  FUJIMOTO SHINJI ,  TANNO SATOSHI ,  IDE SHINICHI

IPC: F28F1/30 ,  F28F1/32

Abstract: PURPOSE:To obtain a heat exchanger prominent in heat transfer performance, by a method wherein slit pieces 5, cut and raised so that the leading edges thereof are opposed substantially to air stream and the cut-and-raised surfaces thereof become parallel substantially to the air stream, are provided on the surface of a fin while the slit pieces are provided with bent pieces, formed by bending the vicinity of the trailing edges of the cut-and-raised surfaces. CONSTITUTION:Heat exchange is effected between airflow B, flowing between fins 4, and heat medium, flowing through the inside of a flat tube 1. In this case, the fins 4 are divided into small pieces in the direction of the airflow B by slit pieces 5, therefore, the growth of the temperature boundary layer (d) of the airflow B, which is generated on the surface of the fins 4, is restricted. Further, bent pieces 6 are provided near the trailing edges of cut-and-raised pieces 5'' of respective slit pieces 5, therefore, the airflow B, passing the surfaces of the cut-and-raised surfaces 5'' while forming the temperature boundary layers (d), collides against the bent pieces 6 whereby the airflow B is separated from the bent pieces 6 in the rear stream thereof and eddies are generated, therefore, the temperature boundary layer (d) of the airflow B is divided into small pieces perfectly and simultaneously. Furthermore, the airflow B, separated by the bent pieces 6, adheres again to the slit pieces 5 in the downstream, therefore, a very high heat transfer rate may be obtained.

公开(公告)号：JPS633189A

公开(公告)日：1988-01-08

申请号：JP14642086

申请日：1986-06-23

Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

Inventor： AOYAMA SHIGEO ,  KOMA HACHIRO ,  FUJIMOTO SHINJI ,  TANAKA HIROYOSHI ,  OBATA MAKOTO

IPC: F28F1/32

Abstract: PURPOSE:To suppress the increase in the draft resistance of the finned heat exchanger and to improve the heat transfer coefficient thereof by installing specific rows of heat transfer tubes in the direction of an airstream per a specific unit width in the airstream direction of fins and setting a distance between adjacent heat transfer tubes to a specific dimension. CONSTITUTION:Heat transfer tubes 8 are installed in three rows or more and five rows or less in a matrix shape with respect to an airstream direction 11 between fin widthsW(18mm approx.

公开(公告)号：JPS62293092A

公开(公告)日：1987-12-19

申请号：JP13341086

申请日：1986-06-09

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： IKOMA MITSUHIRO ,  YAMAMOTO YOSHIAKI ,  YONEDA HIROSHI ,  FUJIMOTO SHINJI

IPC: F28F3/12 ,  F28F9/02

Abstract: PURPOSE:To prevent irregularities from being produced in the amount of a coolant flowing along a plurality of coolant paths and improve the heat transfer performance of a heat transfer tube by arranging wide slits at the central part and narrow slits at both ends in a coolant flowpath provided with a plurality of slits in parallel. CONSTITUTION:In a heat transfer tube used for a fluid flowing in two, vapor-liquid, phases in a tube used in an air conditioner, a refrigerator or the like, wide slits 4 are provided at the central part and narrow slits 5 are provided at both ends, and an outer wall member 9 is laminated integrally on both surfaces of a flat flow path member 6 used as a coolant flowpath, said outer wall member 9 being provided with projected parts 7 and 8 forming an inlet side header and an outlet side header communicating a plurality of said slits 4 and 5 having different widths with each other. In a heat transfer tube 10 thus constituted, the coolant flowpath at parts where the liquid level is high and the liquid coolant easily flows is narrow in width, therefore the flow resistance is increased to prevent the excessive flow of the liquid coolant flowpath. Since the coolant flowpath at parts where the liquid level is low and the liquid coolant is difficult to flow, is wide in width, the flow resistance is small so that the liquid coolant can easily flow, and hence the heat transfer performance of the heat transfer tube is improved.

公开(公告)号：JPS62248980A

公开(公告)日：1987-10-29

申请号：JP9163686

申请日：1986-04-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： FUJIMOTO SHINJI

IPC: F25D19/00

公开(公告)号：JPS62200176A

公开(公告)日：1987-09-03

申请号：JP4224386

申请日：1986-02-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： FUJIMOTO SHINJI

IPC: F25D23/06

公开(公告)号：JPS62200170A

公开(公告)日：1987-09-03

申请号：JP4125986

申请日：1986-02-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： FUJIMOTO SHINJI

IPC: F25D21/04