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公开(公告)号：JPH01121667A
公开(公告)日：1989-05-15
申请号：JP28126387
申请日：1987-11-06
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , IDE SHINICHI
IPC: F25B41/00
Abstract: PURPOSE: To distribute a refrigerant uniformly when a distributor is set in the horizontal or inclining direction by fixing the inlet while shifting it upward of the gravitational direction from the center line of a hollow body in the flow- out direction of refrigerant. CONSTITUTION: When a refrigerant distributor is set in an inclining or horizontal direction, a liquid phase B2 heavier than a gas phase B1 tries to flow more toward an outlet 8b on the oblique lower side in a hollow body 6 under influence of gravity (h). When an inlet 7 is fixed to one end of the hollow body 6 at a position higher by the width C than the center line (n), the liquid phase B2 also flows easily toward an upper outlet 8a close to the line direction. Consequently, the gravity (h) and the width (c) of eccentricity are balanced and the liquid phase B2 flows uniformly toward the upper and lower outlets 8a, 8b resulting in uniform distribution of refrigerant B to a delivery pipe 10.
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公开(公告)号：JPS63189795A
公开(公告)日：1988-08-05
申请号：JP2284587
申请日：1987-02-03
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIMOTO SHINJI , AOYAMA SHIGEO , KIDO OSAO
Abstract: PURPOSE:To present a high performance heat exchanger which is easy to be assembled and in which the shape of the groove is a tube with internal grooves does not change after the assembly by providing a heat transfer pipe of a small diameter with grooves on its inner face, and a fin provided with a fin collar with the width of its opening of/substantially the same dimension as the outer diameter of the heat transfer pipe and providing on the surface of the fin convex sections the height of which is higher than the height of the fin collar. CONSTITUTION:A heat exchanger is provided with a heat transfer pipe 1 of a small diameter which has on its internal face many roughly triangular grooves 14 in which the ratio of the width D between the mountains and width W between the valleys is over 1 and the D is smaller than 0.15 mm and the H larger than 0.1 mm, and a fin 10 which has its width (e) about three times the outer diameter of the heat transfer pipe 11 and also has fin collars 12 and 12' provided at both ends of the fin in the direction of the air flow with each fin collar opened at one end and the width (a) of the opening being about the same as the outer diameter (d) of the heat transfer pipe 11 and which is provided with a convex section with a height higher than the height (b) of the fin collars 12 and 12' on the surface of the fin near the down-stream side of the front row fin collar 12, and the heat exchanger is constituted by inserting the heat transfer pipe 11 into and fixing it to the fin collars 12 and 12' of the fin 10 which are laminated in many layers with the convex section 13 of the fin 10 used as contact face. Accordingly the shape of the groove 14 on the internal face of the heat transfer pipe 11 does not change end the heat conductivity coefficient in the pipe can be much raised.
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公开(公告)号：JPS63189794A
公开(公告)日：1988-08-05
申请号：JP2284487
申请日：1987-02-03
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIMOTO SHINJI , AOYAMA SHIGEO , KIDO OSAO
Abstract: PURPOSE:To make the wall thickness of a heat transfer pipe thin and improve the heat transfer coefficient in the pipe by providing a fin with holes like a net which has a section to make the air penetrate among concave grooves and headers respectively with a plurality of branch pipes which are inserted into and fixed to the inner circumferences at both ends of a flow channel with a groove. CONSTITUTION:A fin 2 with holes like a net consists of a in section 6 through which air can penetrate and concave groove 7 with a small diameter shaped like an arc, and the concave groove 7 has a thin-walled member in the flat plate shape formed in an arc in a small diameter circle with the inner diameter of about 4 mm. with its flat plane section at both ends 7a and 7b and its central section 7c with a groove. An inlet header 4 and outlet header 5 have their branch pipes 3 inserted into a heat transfer pipe 1 and those branch pipes are fixed on to the pipe 1 with an adhesive, etc. Air flows in the direction of F among the fins 2 with holes like a net and a heating medium flows in the flow channel 8 with groove of a heat transfer pipe 1. And, the heat exchange is carried out between the heating medium and air flow through the heat transfer pipe 1 and the fins 2 with holes like a net. In this heat exchange, because the heat transfer pipe 1 has the thin wall and the flow channel 8 of the small diameter with groove, the heat transfer coefficient in the pipe can be much raised, and on the other hand, on the side of the air, the fin 2 with holes like a with high heat conductivity is provided which is capable of increasing the capability of the heat exchanger because the surface area on the fins can be increased.
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公开(公告)号：JPS6383591A
公开(公告)日：1988-04-14
申请号：JP22903486
申请日：1986-09-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , FUJIMOTO SHINJI , TANNO SATOSHI , IDE SHINICHI
Abstract: PURPOSE:To obtain a high heat transfer rate in the whole area of a fin, by a method wherein slit pieces, cut-and-raised so that the cut-and-raised surface becomes parallel substantially to the flow direction of air, are provided on the surface of a fin while a part near the leading edge of the cut-and-raised surface is bent to provide a bent piece, opposing to an airflow substantially, on the slit piece. CONSTITUTION:Heat exchange is effected between airflow B, which flows between fins 4, and heat medium, which flows through the inside of a flat tube 1, through the fins 4 and the flat tubes 1. In this case, the fin 4 is 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 between fins 4, is restricted. Further, the airflow B collides against the bent piece 6 provided on the leading edge of the slit piece 5 whereby the temperature boundary layer (d) of the airflow B, which is formed by the upstream side slit piece 5 and kept as it is, is divided perfectly into small pieces. Furthermore, burbling eddies, which are extremely disturbed flows, are generated in the airflow B collided against the bent pieces 6 at the downstream side of the bent pieces 6 whereby re-adhesion effect may be obtained by the arrival of the burbling eddies at the cut-and-raised surfaces 5' of the cut-and-raised pieces 5.
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公开(公告)号：JPS6329194A
公开(公告)日：1988-02-06
申请号：JP17128386
申请日：1986-07-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , FUJIMOTO SHINJI , TANNO SATOSHI , IDE SHINICHI
Abstract: PURPOSE:To provide a high coefficient of heat transfer for a gas flow over an entire range from upstream fins to downstream fins by a method wherein overlapped fins are provided between parallel flat pipes, some slit pieces are cut and raised at the fin surfaces and a plurality of steps of cut and raised steps are arranged. CONSTITUTION:When a heat exchanging operation is performed between gas flow B flowing between fins of fins 4 and heat medium flowing in flat pipes 1 through fins 4 and the flat pipes 1, slit pieces 5 are continuously formed at the fin surface 4 and the slit pieces 5 are arranged in a direction of gas flow B with a distance between the slit pieces 5 being more than four times the slit width (d), resulting in that a production of a temperature interface layer (g) of the gas flow B is restricted near rear edges of the slit pieces 5a, and a quite high coefficient of heat transfer can be attained between the gas flow B and the pipes not only at the front edges of the slit pieces 5a but also at their rear edges. The slit pieces 5a-5e are arranged with their cut and raised height (e) being displaced by c/5 on a line (f) slantly crossing the fins 4, resulting in that the gas flow B flowing between the slit pieces 5a-5e may provide a continuous high rate of thermal conduction not only at all front edges but also at the rear edges of the lower surfaces of the slit pieces.
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Patent Agency Ranking
公开(公告)号：JPS62284199A
公开(公告)日：1987-12-10
申请号：JP12758386
申请日：1986-06-02
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： YONEDA HIROSHI , KIDO OSAO , IKOMA MITSUHIRO , YAMAMOTO YOSHIAKI
Abstract: PURPOSE:To sharply improve vaporized heat transfer through the formation of a cavity in the liquid refrigerant flow part of a rectangular flow passage, by a method wherein, plural grooves are formed in a direction, extending vertically or obliquely to the direction of a flow passage, in both surfaces of a flow passage member having plural slits, and flat laminar outer wall members are laminated to both surface of the flow passage members for integral formation. CONSTITUTION:Plural grooves 14, extending vertically to the direction of a refrigerant flow passage, are formed in both surfaces of a flow passage member 12 having plural slits 13 with which a refrigerant flow passage is formed, and the groove 14 has a small size large enough to allow holding of a liquid refrigerant by virtur of surface tension of the refrigerant. Flat laminar outer wall member 15, each having protrusions 17 forming a header part through which the slits 13 are intercommunicated and which is connected to a refrigerant outlet inlet pipe 16, are laminated to the upper and the under part of the member 12 for integral formation to form a heat transfer pipe 11. A fine hollow part, formed with fine grooves 14 and the flow passage member 12,is formed to each of the four corner parts of the rectangular cross section of the refrigerant flow passage, the fine hollow part forms a cavity and serves to suck a liquid refrigerant and forms a boiling core, and sharply promotes vaporized heat transfer.
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公开(公告)号：JPS62280585A
公开(公告)日：1987-12-05
申请号：JP12252986
申请日：1986-05-28
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： YONEDA HIROSHI , KIDO OSAO , IKOMA MITSUHIRO , YAMAMOTO YOSHIAKI
Abstract: PURPOSE:To sharply improve heat transfer performance and to prevent the occurrence of liguid-back, by a method wherein a flow passage member and an outer wall member are laminated together for integral formation, the volume of an outlet header, through which slits of the flow passage member are intercommunicated is set to a value large enough to allow separation of gas and liquid from each other. CONSTITUTION:A flat laminar heat transfer tube 11 is formed such that flat laminate outer wall members 16, 16, having protrusion Parts 15, intercommunicating slits 12, formed in a flow passage member 17 and serving as a refrigerant flow passage, and forming a header part 14 connected to a refrigerant outlet and inlet pipe 13, are integrally laminated. The outlet header part 14 positioned to an upper part is large enough to allow passage of a refrigerant, and has an internal volume being large enough to allow separation of gas and liquid from each other. The heat transfer pipe is used as the heat transfer pipe of a vaporizer, a 2-Phase refrigerant flowing through the lower inlet pipe 13 is separated into gas and liquid at the outlet header part 14, a liquid refrigerant is returned to a refrigerant flow passage under gravity again, and a heat transfer surface is wet, resulting in sharp improvement of heat transfer performance.
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公开(公告)号：JPS62178888A
公开(公告)日：1987-08-05
申请号：JP2084186
申请日：1986-01-31
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI
Abstract: PURPOSE:To provide a heat exchanger in which the heat transfer coefficient thereof between fins and an air stream is not lowered even in a heat exchanger long in the air stream direction and the heat exchange ability is large, by forming slitted and raised portions in parallel to the air stream direction into fin surfaces by bending a part of fins. CONSTITUTION:Heat exchange is carried out between an air stream B flowing through fins 5 and a heat medium flowing inside a flat pipe 1 via the fins 4 and the flat pipe 1. Upon this occasion, since the development of a temperature interface layer of the air stream B generated on the surface of fins 4 is interrupted by slitted and raised surfaces 5 and a long hole 6, and the slitted and raised surfaces 5 are formed vertically with the fins 4, the direction of development of the temperature interface layer generated on the slitted and raised surfaces becomes vertical with that of the temperature interface layer generated on the surface of fins 4. Therefore, the temperature interface layer is completely divided, and the temperature interface layer front edge effect of a maximum limit can be obtained. Further, since the slitted and raised surface 5 is formed in parallel to the direction of the air stream B, the reduction in the ventilation resistance can be realized.
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公开(公告)号：JPS62175589A
公开(公告)日：1987-08-01
申请号：JP1518886
申请日：1986-01-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI
Abstract: PURPOSE:To increase heat exchanging capacity by a method wherein 9 slit piece, whose leading edge is opposed to airflow, is provided on the surface of a fin so that the raised-slotted surface thereof becomes parallel substantially to the fin while a bent piece, not parallel to the fin, is formed by notching one part of the raised-slotted surface. CONSTITUTION:A bent piece 6, bent vertically by notching one part of a raised- slotted surface 5c, is provided so as to be orthogonal to a fin 4 and zigzag in the direction of airflow B. Then, the development of a temperature boundary layer of the airflow B, generated on the surface of the fin orthogonally to the surface of the same, is cut apart by a slit piece 5. In this case, the developing direction of the temperature boundary layer, generated on the surface of the bent piece 6, becomes orthogonal to the developing direction of the same, generated on the surface of the raised-slotted surface 5c, therefore, the temperature boundary layer is cut apart perfectly. On the other hand, the raised-slotted surface 5c and the bent piece 6 will never change the flow direction of the airflow B, therefore, ventilating resistance will never be increased. Accordingly, heat transfer rate between the airflow B and the fin 4 will never be deteriorated even in case a heat exchanger is long in the direction of the airflow B.
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公开(公告)号：JPS6219694A
公开(公告)日：1987-01-28
申请号：JP15904885
申请日：1985-07-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： YONEDA HIROSHI , KIDO OSAO
Abstract: PURPOSE:To make it possible to secure a vent passage when frosting, inhibit the increase in the ventilation resistance, suppress the lowering of the ventilation quantity and maintain the capacity for a long time by providing slit shaped or louver shaped notches in fins, and providing long holes at the airstream upstream side of the notches. CONSTITUTION:Fins 11 are aligned at a predetermined interval in parallel to each other to form a fin group 12. Heat medium tubes 13 are inserted into the fin group 12 at a right angle. Slit-like notches 15 formed in the fins 11 divide the fins 11 with respect to the airstream. Long holes 16 are formed at the airstream upstream side of the notches 15. Since the airstream flows in the direction B, and the fins 11 are divided by the slit-like notches 15, the heat transfer is improved. When the evaporating temperature is 0 deg.C or less, frosting occurs. When the frosting proceeds, frosting is concentrated on the fins 11 and the front edge portion of slit-like notches. However, since the long hole 16 is formed on the airstream upstream side, even when it frosts, clogging due to frost is difficult to occur, and hence the ventilation passage is secured.
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