公开(公告)号：JPS646699A

公开(公告)日：1989-01-11

申请号：JP16007087

申请日：1987-06-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： AOYAMA SHIGEO ,  FUJIMOTO SHINJI

IPC: F28F1/32

Abstract: PURPOSE:To heighten heat transfer coefficient, by determining the pitches of heat transfer tubes in the direction at right angles with an air flow larger than those in the flowing direction of an air, and by disposing the heat transfer tubes so that the projected area of heat transfer tubes in a row (2N-1) does not overlap on the heat transfer tubes in a row (2N+1), although it partially overlaps on the heat transfer tubes in a row 2N which are positioned right after the tubes in the row (2N-1). CONSTITUTION:Heat transfer tubes are disposed in such a manner that the projected area 15a of heat transfer tubes 10a in the first row to the downstream side against the flowing direction of an air 14, is partially overlapped on the heat transfer tubes 10b in the second row, positioned in the after flow of heat transfer tubes 10a. With this arrangement, a corrugation crest 13 can be installed getting into the after-flow part of a heat transfer tubes 10a; accordingly, a flow which comes off from the ridge 16 of a crest 13 can adhere on a fin 11 on the downstream side again, so that the heat transfer rate in this part can be improved. In case that condensate adheres on the surface of a fin, it can easily drop passing between the heat transfer tubes of the first and the second rows, so that the heat transfer rate at dewy time can be improved. The heat transfer rates both at dry time and at wet time can be increased, so that a compact and highly efficient heat exchanger with fin can be realized.

公开(公告)号：JPS63254396A

公开(公告)日：1988-10-21

申请号：JP9028487

申请日：1987-04-13

Applicant: MATSUSHITA REFRIGERATION

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

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

Abstract: PURPOSE:To completely divide growth of a temperature boundary layer and to enable maintenance of a heat transfer rate between an air flow and a fin at a high value, by a method wherein a cut-rise surface extending in parallel to the direction of an air flow is formed in a fin surface, and the height of the cut rise is changed in a stepped manner to form a meandering pattern. CONSTITUTION:Fins 5 are fixed in a corrugated manner to a heat transfer pipe 4 at intervals of a fin pitch. Cut rise surfaces 6 formed on both surfaces of the fin 5 are formed so as to extend in parallel to the direction of an air flow B. The height of the cut-rise surface 6 from the fin 5 is set to values in two stages of the one being 1/5 of a fin pitch and the other being 2/5 of the fin pitch. The cut-rise surface 6 in a five-stage is changed by 1/5 of a fin pitch at each stage to form a meandering pattern. Since, during heat exchange, an air flow B flows a flow passage where increase and decrease in a distance between the fins are repeated, a pressure difference is produced between both surfaces of the fin 5, and by dividing growth of the temperature boundary layer of the air flow B generated on the cut-rise surface 6, a heat transfer rate can be maintained at a high value.

公开(公告)号：JPS63197887A

公开(公告)日：1988-08-16

申请号：JP3036887

申请日：1987-02-12

Applicant: MATSUSHITA REFRIGERATION

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

IPC: F28D1/047 ,  F28F1/02 ,  F28F1/40

Abstract: PURPOSE:To improve heat exchanging efficiency by a method wherein a sectional area of each of passages in a flat thermal conducting pipe having several passages therein is made equal to each other, a sectional shape of each of the passages is constructed as a rectangular flow passage having a high lateral ratio in which the upstream side of the air flow is composed of a pipe having an inner surface groove and the downstream side is composed of a flat pipe. CONSTITUTION:In rectangular flow passages 6d-6n having a high lateral ratio at the downstream side of an air flow A having two-phase flow of a high liquid ratio, a promotion of thermal conduction and an increased pressure loss caused by an increased thermal conductivity of evaporation heat in a pipe under an influence of an increased in-pipe area and a decreased liquid film thickness and an increased pressure loss are generated. A thermal conduction under an improved evaporation heat conductivity can be promoted within pipes 8a-8c with inner surface grooves at the upstream side of the air flow A in which two-phase flows with less liquid ratio without increasing substantial pressure loss. Accordingly, a flow passage resistance in each of the passages 6a-6n can be decreased at the upstream side of air flow A and can be increased at the downstream side while the sectional areas of the passages 6a-6n are made similar to each other, so that a flow rate of the passages 6a-6c at the upstream side can be increased. Accordingly, promotion of thermal conduction and uniforming of over-heated area 15' can be attained and substantial increase of heat exchanging performance can be obtained.

公开(公告)号：JPS63197884A

公开(公告)日：1988-08-16

申请号：JP3037187

申请日：1987-02-12

Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

Inventor： AOYAMA SHIGEO ,  FUJIMOTO SHINJI ,  KAN HIROAKI ,  TANAKA HIROYOSHI ,  OBATA MAKOTO

IPC: F28F1/32

Abstract: PURPOSE:To increase the effective thermal conducting area of fins without increasing aeration resistance in a heat exchanger to be used in an air conditioner and a refrigerator or the like by a method wherein some projections are provided on fins near thermal conducting pipes in such a manner as a part is overlapped on projected planes of the thermal conducting pipes in respect to an air flow direction. CONSTITUTION:Semi-spherical projections 15 which are smaller than the sectional area of a thermal conducting pipe 10 are arranged at front and rear surfaces of fins 12 near a downstream area of the thermal conducting pipe 10 in such a manner as their part may overlap a projected plane 14 of the thermal conducting pipe to in respect to a direction of air stream 13. A height (h) of the projection 15 is about 1/3 of a spacing (pf) of fins 12. Due to this fact, a flow separating from the surface of the thermal conducting pipe 10 is flowed to around at a rear part of the thermal conducting pipe 10 by projections 15, so that an area of a dead flow area 16 generated at a downstream flow of the thermal conducting pipe 10 is decreased. As a result of these actions, it is possible to make a substantial increase in the thermal conductivity without increasing any aeration resistance and further it is possible to make a small-sized and high performance finned heat exchanger.

公开(公告)号：JPS63163787A

公开(公告)日：1988-07-07

申请号：JP31231986

申请日：1986-12-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： FUJIMOTO SHINJI ,  KIDO OSAO ,  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 arranging paralleled slits and inclined slits alternately by raising the plurality of slits from the side of an upper stage and from the side of a lower stage alternately, making 1 pitch (4Xd) of a fin base, which is left unraised at the pitch four times of the width 'd' of a slit, as a basis pitch. CONSTITUTION:Slits 5 are raised from the surfaces on both sides of a fin 4. The raised heights 'e' are 1/4 and 1/2 of a fin pitch 'c' respectively. They are arranged on the sides of an upper stage and of a lower stage alternately, making a fin base 4a of which width is 'd', which is left unraised at the pitch four times of the width 'd' of a slit 5, as a basis pitch, as well as they are arranged staggeredly in the direction of an air flow 'B'. Slits 5a, 5c, 5d and 5f only are inclined at the angle of thetaso that a pitch 'f' between slits on the side from which an air flow comes in is to be larger than the height of a slit represented by e=1/4c. The resistance to the flow path in each part can be uniformed by arranging paralleled slits and inclined slits alternately. Besides the boundary layer of temperature is prevented from growing by taking the pitch between slits on the upstream side and on the downstream side largely; as a result, the heat transfer coefficient of a fin 4 to the air flow B can be increased.

公开(公告)号：JPS63150588A

公开(公告)日：1988-06-23

申请号：JP29955586

申请日：1986-12-16

Applicant: MATSUSHITA REFRIGERATION

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

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

Abstract: PURPOSE:To improve heat transfer performance in maintaining a heat transfer rate between fins and an air flow at a high level in a section covered from the upstream side to the downstream side by preventing temp. boundary layers formed by the slit pieces at the upstream side from covering the slit pieces at the downstream on the same plane. CONSTITUTION:A part of fins 4 is cut and raised and a number of slit pieces 5 are installed along an air flow direction B. The width (d) of each slit piece in the air flow direction is formed equally and the pitch (p) of fin bases 4' and the slit pieces 5 in the air flow direction is made four times the width (d) of the slit piece 5. At one side with reference to the fin base 4', slit pieces 5c, 5d in two steps having heights of 1/4 and 1/2 of a fin pitch (c) are cut and raised and at the other side slit piece 5a in one step having a height of 1/4 of the pitch (c) is cut and raised. By forming the fin pitch (c) in order to arrange the gaps between respective slit pieces 5a-5d in the height direction to be 0.2-0.3 mm, the air flows uniformly in the parts between the slits 5a-5d and the development of temp. boundary layers of the air flow B generated on the surfaces of the slit pieces 5 near the back edges of the slits is controlled, and a high heat transfer rate can be obtained between the fins 4 and the air flow B.

公开(公告)号：JPS63108196A

公开(公告)日：1988-05-13

申请号：JP25406386

申请日：1986-10-24

Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

Inventor： AOYAMA SHIGEO ,  FUJIMOTO SHINJI ,  KATO KAORU ,  TSUDA YOSHIYUKI ,  OBATA MAKOTO

IPC: F28F1/32

Abstract: PURPOSE:To decrease a thermal resistance of fins, and to get a compact and high efficiency heat exchanger with fins by a method wherein flows between thermal conducting pipes are made uniform, an excessive amount of air passing through cut and raised portions is not decreased, a flow of the air is guided under fluid adhering phenomenon of fluid at a water preventing area, and a constitution of thermal conducting pipes and thermal conducting surfaces not preventing a thermal flow between the thermal conducting pipes is employed. CONSTITUTION:Assuming that an angle formed by a center line of a thermal conducting pipe in a row of upstream side 2 connecting centers of the thermal conducting pipes is alpha deg.and similarly an angle formed by a center line connecting centers of the thermal conducting pipes in a row of downstream side 2 in respect to an air flow direction 14 is beta deg., a relation of alpha

公开(公告)号：JPS59189272A

公开(公告)日：1984-10-26

申请号：JP5263584

申请日：1984-03-19

Applicant: Matsushita Refrigeration

Inventor： TAKEDA JIYUN ,  FUJIMOTO SHINJI ,  NODA TOSHINORI

IPC: F25D19/00 ,  F25D23/00

CPC classification number: F25D23/003

公开(公告)号：JPS5899675A

公开(公告)日：1983-06-14

申请号：JP19930881

申请日：1981-12-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： FUJIMOTO SHINJI

IPC: F25B41/04

公开(公告)号：JPS5818062A

公开(公告)日：1983-02-02

申请号：JP11573381

申请日：1981-07-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： NASU HITOSHI ,  FUJIMOTO SHINJI

IPC: F25D21/08 ,  F25B1/00 ,  F25D21/06