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公开(公告)号：JPS62293068A
公开(公告)日：1987-12-19
申请号：JP13340986
申请日：1986-06-09
Applicant: MATSUSHITA ELECTRIC IND CO LTD , MATSUSHITA REFRIGERATION
Inventor： YAMAMOTO YOSHIAKI , IKOMA MITSUHIRO , YONEDA HIROSHI , FUJIMOTO SHINJI
IPC: F25B39/02
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公开(公告)号：JPS62288461A
公开(公告)日：1987-12-15
申请号：JP13079386
申请日：1986-06-05
Applicant: MATSUSHITA ELECTRIC IND CO LTD , MATSUSHITA REFRIGERATION
Inventor： TSUDA YOSHIYUKI , ANDO TOMOAKI , YOKOYAMA SHOICHI , YONEDA HIROSHI , KOMA HACHIRO
IPC: F25B39/02
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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：JPS62248994A
公开(公告)日：1987-10-29
申请号：JP9164386
申请日：1986-04-21
Applicant: MATSUSHITA ELECTRIC IND CO LTD , MATSUSHITA REFRIGERATION
Inventor： TSUDA YOSHIYUKI , NISHIWAKI FUMITOSHI , OBATA MAKOTO , YONEDA HIROSHI , KOMA HACHIRO
IPC: F28F1/32
Abstract: PURPOSE:To make it possible to manufacture a finned heat exchanger highey generalpurposed with no limitation of the distance between fins even when heat transfer pipes with small pipe diameter are employed by a method wherein projected parts and recessed parts are provided on each flat plate fin and a fin collar is provided at each projected part and at each recessed part. CONSTITUTION:Projected parts 7 and recessed parts 8 are provided alternately on a flat plate fin 4 in the direction of the stage of heat transfer pipes 5 and fin collars 6 and 9 are prespectively provided at each projected part 7 and at each recessed part 8 in the order named. The recessed part 8 is brought into contact with the fin collar 6' provided at the projected part 7' of an adjacent flat plate fin 4'. Because the distance between fins L is the sum of the height l1 of the projected part 7' of the flat plate fin 4', the height l2 of the recessed part 8 of the flat plate fin 4 and the height l3 of the fin collar 6', even if l3 is limited in manufacturing, any distance between fins L can be realized by changing l1 and l2. Accordingly, even when heat transfer pipes with small diameter are employed, a heat exchanger with any distance between fins can be manufactured. Consequently, when a heat exchanger, in which small diameter heat transfer pipes are employed for aiming at a small-sized higher efficiency heat exchanger, is used as an evaporator, specifications preventing the bridging of condensate between fins and clogging of fins due to frosting from occurring can be easily manufactured.
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Patent Agency Ranking
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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公开(公告)号：JPS61272593A
公开(公告)日：1986-12-02
申请号：JP11363485
申请日：1985-05-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI , TANNO SATOSHI , KOMA HACHIRO , SUGA HIROAKI
IPC: F28F1/32
Abstract: PURPOSE:To obtain a large amount of heat transfer, by providing many divided bent pieces at air-stream inlet ends of fins, and providing slits on the surface of the fins. CONSTITUTION:Heat exchange is carried out between air stream flowing between fins 4 and a heat medium flowing in heat medium pipes 2. At this time, since the fin unit 4 is divided into many columns in the direction of the air stream B, development of boundary layers yielded on the surfaces of the fins is divided. The air stream B is largely disturbed by the heat medium pipes 2, which are arranged in a zig-zag shape, and bent pieces, which are provided at the air-stream inlet ends of the fins 4. Thus heat transfer is accelerated. Furthermore, since slits 6 are positioned on the downstream side of the air stream B immediately after the bent pieces 5, the boundary layers yielded in the vicinities of the slits 6 becomes very thin even if a fin pitch (d) is large. Even if the height (e) of the slit 6 is relatively low with respect to the fin pitch (d), the slits 6 are not included in the boundary layers but divides the boundary layers. Therefore, the thickness of the boundary layer is kept very thin and the very large heat transfer can be obtained.
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公开(公告)号：JPS61202093A
公开(公告)日：1986-09-06
申请号：JP4222985
申请日：1985-03-04
Applicant: MATSUSHITA REFRIGERATION
Inventor： YONEDA HIROSHI , KIDO OSAO
Abstract: PURPOSE:To extend the operating hours up to a point of a clogging due to the frosting so that the average heating operation efficiency may be improved and the uncomfortable feeling may be reduced during the defrosting operation by forming only the fin leading edge in a waved shape, said fin being situated on the upstream side on the first row heat transmission pipe relative to the ventilated air flow. CONSTITUTION:The waved leading edge area 13 is disposed on the leading edge of fins facing the upstream side of the air flow on the first row heat transmission pipe 12 relative to the air flow (shown by arrow). When operating in the heating mode, the frosting in the E-E section can be reduced in its height for a same amount of frosting because there are waved leading edge areas 13 on the air flow upstream side of the fin 11, making the length of the leading edge longer than the straight type. As a result, the increase of the air flow resistance due to the frosting on these areas can be made less. Although there is a frosting condition similar to the conventional fin in the F-F section, because the frosting height is reduced in the waved lending edge areas 13 in the fin leading edge in the E-E section, the heat exchanger as a whole will display a nearly uniform frosting condition (frosting height).
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