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公开(公告)号：CA2008884C
公开(公告)日：1995-09-05
申请号：CA2008884
申请日：1990-01-30
Applicant: MATSUSHITA ELECTRIC IND CO LTD , MATSUSHITA REFRIGERATION
Inventor： KUSUHARA HISAO , YOKOYAMA SHOICHI , KOMA HACHIRO , KATO KAORU
Abstract: The present invention relates to a fin tube heat exchanger used in an air conditioner or the like. The heat exchanger is comprised of a plurality of fin plates spaced at regular intervals in parallel with one another and a plurality of heat exchanger tubes arranged in at least one row and extending through the fin plates in a direction perpendicular to the direction in which the fin plates extend. The invention provides a plurality of raised strips formed on each fin plate in a direction perpendicular to an air flow and raised out of the plane of the fin plate, and at least one draining passage formed on each fin plate and extending along the center line of the row of the heat exchanger tubes. In this heat exchanger, air flows between the fin plates and a fluid medium passes through the heat exchanger tubes. Each raised strip has two leg portions which are inclined with respect to the direction of the air flow. The raised strips in one row near to a longitudinal edge of the fin plate are increased in number as compared with those in another row near to the center line of the row of the heat exchanger tubes. No raised strip is formed in the draining passage.
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公开(公告)号：CA1252272A
公开(公告)日：1989-04-11
申请号：CA448930
申请日：1984-03-06
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANNO SATOSHI , KOMA HACHIRO , AOKI YUKICHI , ITO HIRONORI , YONEDA HIROSHI , AOYAMA SHIGEO
Abstract: A method of manufacturing a fin-tube heat exchanger which includes a multiplicity of plate fins arranged in a plurality of rows disposed at a predetermined pitch in the direction of air flow, and a jointless refrigerant pipe extending through the plate fins in a zigzag manner. Pipe-receiving holes are formed in each plate fin in an offset manner relative to the center of the plate fin. The plate fins are then placed in fin-receiving grooves formed in a straight fin positioning fixture at predetermined spacings such that the same longitudinal ends of the plate fins of alternating rows appear on the same side of the fin positioning fixture and such that the pipe-receiving holes are linearly aligned. The refrigerant pipe is inserted into the pipereceiving holes and is expanded to make tight and close contact with the plate fins. The refrigerant pipe is bent in a zigzag manner so that the straight portions of the pipe occupy corners of rectangles and so that a predetermined spacing is provided between the opposite ends of the plate fins of adjacent rows. Finally, a twist is imparted to the refrigerant pipe to line up the plate fins and arrange the pipe such that the straight portions of the pipe are positioned in a staggered manner, as viewed in the direction of the rows.
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公开(公告)号：JPH07167533A
公开(公告)日：1995-07-04
申请号：JP31315493
申请日：1993-12-14
Applicant: MATSUSHITA REFRIGERATION
Inventor： SUGA HIROAKI , KOMA HACHIRO
Abstract: PURPOSE:To downsize a heat exchanger and to enhance the performance through with a capillary tube to be used for refrigerator, an air conditioner, etc. CONSTITUTION:The heat exchanger comprises a heat transfer tube 11 in which refrigerant flows therein, a plurality of fins 13 inserted into the tube 11, and a capillary tube 13a comunicating with the tube 11, wherein an outlet side of the tube 13 is spirally bent to be inserted into the tube 11.
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公开(公告)号：JPH0443292A
公开(公告)日：1992-02-13
申请号：JP15211490
申请日：1990-06-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KASE HIROAKI , KOMA HACHIRO
Abstract: PURPOSE:To increase the strength of the rear rim of fins to improve the unevenness of airstream distribution in the rear flow of a heat exchanger, eliminate the damage of the fins and obtain the heat exchanger, good in appearance and having high performance and low noise, by a method wherein the fins are provided with a plurality of notches on the fore rims in the direction of airstream while the rear rim of the same is provided with wavy bent parts. CONSTITUTION:A fin 2 is provided with a plurality of notches 4 on the fore rim of the same while the rear rim of the same is provided with wavy bent parts. A collar 6 is provided at the rim of the notches 4. Upon inserting a heat transfer tube 3 into the notched part 4 of the fore rim of the fin 2, the fore rim of the fin, which is provided with the collar 6, is comparatively strong against a force in the inserting direction of the tube 3 while the rear rim of the fin can also support the force upon inserting the tube 3 through bent parts 5, strong in the structure thereof, and therefore, the buckling damage of the fin is hardly caused.
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公开(公告)号：JPH0363499A
公开(公告)日：1991-03-19
申请号：JP19900389
申请日：1989-07-31
Applicant: MATSUSHITA REFRIGERATION
Inventor： KASE HIROAKI , KIDO OSAO , KOMA HACHIRO
IPC: F28F1/32
Abstract: PURPOSE:To improve a dropping of water drpplets condensed at fins and restrict an increasing of aeration resistance of air flow and a decreasing of a thermal transmitting efficiency by a method wherein some space holding pieces having a wider width of an extreme end than that of a root part are positioned at a rear part of a thermal transmitting pipe in respect to a direction of air flow and further applied as projections in parallel with a direction of their gravities. CONSTITUTION:Some space holding pieces 12 having wider cut and raised end edges than widths of roots and further having widths of the cut and raised end edges smaller than a width of a thermal transmitting pipe at several fins 11 arranged at a specified spacing are positioned at a rear part of the thermal transmitting pipe in respect to an air flow and formed as projections in parallel with a direction of their weight. The heat exchanger having fins is used as an evaporator and in case that water droplets are condensed at an outer surface of the evaporator, the space holding pieces 12 are in parallel with their weighing directions, so that no water droplets are accumulated and when the condensed water droplets are dropped below the heat exchanger by their own weights, the spacing holding pieces 12 do not make any troubles to improve a dropping of the water droplets, and increasing of the aeration resistance of the air flow and a reduction of a thermal transmitting efficiency of the air flow are restricted.
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Patent Agency Ranking
公开(公告)号：JPH02219986A
公开(公告)日：1990-09-03
申请号：JP4087689
申请日：1989-02-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： KOMA HACHIRO , NAKAYAMA KOICHI , IDE SHINICHI , SUGA HIROAKI
Abstract: PURPOSE:To make nonuniformity of load distribution difficultly occur, to perform heat exchange between refrigerant and the air current effectively and to prevent heat exchange amount from decreasing in a whole heat exchanger by repeating combination and dispersion for each header in refrigerant circuits. CONSTITUTION:Low pressure two-phase refrigerant having low dryness is passed through a relatively thin inlet tube 26, accelerated, vapor and liquid are mixed, and fed to a header 24a. The refrigerant is uniformly distributed from refrigerant outlet holes 31a, 32a, 33a of the header 24a, to be fed out, and introduced from refrigerant inlets 31b, 32b, 33b to the refrigerant inlet 24e of a header 24b through a substantially U-shaped refrigerant tube 23. The refrigerant combined again to one flow is introduced to a refrigerant output 24f of the header 24b through an orifice 41. In this case, the refrigerant flow is reduced by the orifice 41, accelerated at its flowing speed, and the vapor and the liquid are mixed. The refrigerant is uniformly distributed from refrigerant outlet holes 34b, 35b, 36b of the header 24b, and introduced from refrigerant inlet holes 34a, 35a, 36a to the refrigerant inlet 24g of a header 24c through a substantially U-shaped refrigerant tube 23.
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公开(公告)号：JPH0271095A
公开(公告)日：1990-03-09
申请号：JP22175588
申请日：1988-09-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAYAMA KOICHI , KOMA HACHIRO , IDE SHINICHI , SUGA HIROAKI
Abstract: PURPOSE:To form small cavities in the wall surface of a heat transfer pipe to promote nuclear boiling of a refrigerant and to improve thermal conductivity on the inner side of a pipe compared with that during the use of a heat transfer pipe alone by a method wherein during expansion of the pipe for adhesion of a heat transfer fin to a heat transfer pipe, the shape, looking just like a helical groove, of the inner surface of the heat transfer pipe forms hole parts. CONSTITUTION:A heat exchanger comprises heat transfer fins arranged in parallel at intervals of a specified distance and a heat transfer pipe 11 which is inserted into heat transfer fins at right angles and in the inner surface of which a groove looking just like a helical shape is formed. During expansion of a pipe for adhesion between the transfer fins and the heat transfer pipe 11, the shape, looking just like a helical groove, of the inner surface of the heat transfer pipe 11 forms hole parts 16. Not only the agitating effect of a refrigerant produced by crests 18 and 19, formed in shapes symmetrical to each other, of the heat transfer pipe 11 after expansion of the pipe but also nuclear boiling by a small cavity serving as a nucleus in the hole part 16 during vaporization is promoted. As a result, thermal conductivity on the inner side of the heat transfer pipe is improved compared with that during the use of the heat transfer pipe 11 alone, high-efficiency heat exchange between a refrigerant and air is effected, and performance of the heat exchanger is improved compared with that of a conventional type.
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公开(公告)号：JPH0233595A
公开(公告)日：1990-02-02
申请号：JP18437888
申请日：1988-07-22
Applicant: MATSUSHITA REFRIGERATION
Inventor： KATO KAORU , KOMA HACHIRO
IPC: F28F1/32
Abstract: PURPOSE:To improve heat transfer rate remarkably by a method wherein the title heat exchanger is constituted of a multitude of sheet type fins, arranged in parallel with a given space and between which air flows, and heat transfer tubes, penetrated through the sheet type fins orthogonally to the same and through which fluid flows. CONSTITUTION:Heat transfer tubes 13 having the outer diameter of D0 are penetrated through sheet type fins 11 with a tube row pitch L1 (1.2D0
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公开(公告)号：JPH01234689A
公开(公告)日：1989-09-19
申请号：JP5878888
申请日：1988-03-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KASE HIROAKI , KOMA HACHIRO , NAKAYAMA KOICHI , SUGA HIROAKI , IDE SHINICHI
Abstract: PURPOSE:To aim at stabilizing the flow dividing rate of coolant in a three way bend for coolant in a refrigerator or the like, by providing an orifice part in an inlet pipe part which is integrally formed with a pipe section having both end parts serving as outlet ports and which is extruded from a substantially center part of the pipe section. CONSTITUTION:A coolant 19 flowing through a connecting pipe 20 flows in a two phase stream consisting of a gas phase part 19a and a liquid phase part 19b while flowing into one end part of an inlet pipe part 17a of a three way bend through a hole 18. At this stage, the hole 18 provided in the inlet pipe part 17a serves as an orifice so that the coolant 19 having passed through the hole 18 falls in such a condition that the separated liquid and gas phase parts are mixed together while the flow rate thereof being increased. Thus, it is unlikely to be affected by the gravitational force, and no stream sticks to the inner peripheral surface of a branch section. Further, it is possible to prevent affection by dispersion of inner peripheral shapes.
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公开(公告)号：JPH01212878A
公开(公告)日：1989-08-25
申请号：JP3819388
申请日：1988-02-19
Applicant: MATSUSHITA REFRIGERATION
Inventor： KASE HIROAKI , KOMA HACHIRO , NAKAYAMA KOICHI , SUGA HIROAKI
IPC: F25B41/00
Abstract: PURPOSE:To provide a flow separator which makes separated flows uniform and is effectively utilized for the heat exchanger of each of a vaporizer, a condenser, etc., by a method wherein a throttle part, the in-pipe flow passage sectional area of which is decreased to a value lower than a specified value, is provided at the pipe part on the inflow side of the flow separator. CONSTITUTION:In a flow separator 1 to branch and feed a refrigerant, flowing from one-way, to two ways, a round pipe is bulge-method to form one pipe part 1a on the inflow side and two pipe parts 1b and 1c on the outflow side. A throttle part 1d, the in-pipe flow passage sectional area of which is up to 1/4 times as large as other in-pipe flow passage section area, is formed to a part of the pipe part 1a on the inflow side. 2, 3 and 4 are a copper pipe connected to the pipe part 1a on the inflow side and pipe parts 1b and 1c on the outflow side, respectively. A refrigerant A enters the flow separator 1 as it is separated into a vapor phase part 5a and a liquid phase part 5b to separate a flow, and when the refrigerant flows through a throttle part 1d of the pipe part 1a on the inflow side, vaporization of a part of a liquid phase is caused due to a sudden pressure drops, and vapor and liquid are mixed again and injected in an atomized state. As noted above, the refrigerant is brought into an atomized state, resulting in the possibility of being uniformly distributed without effect of gravity at the time of mounting and deflection due to a Coanda effect.
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