CN1111717C - Refrigerant tubes for heat exchangers - Google Patents

Refrigerant tubes for heat exchangers Download PDF

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Publication number
CN1111717C
CN1111717C CN96108774A CN96108774A CN1111717C CN 1111717 C CN1111717 C CN 1111717C CN 96108774 A CN96108774 A CN 96108774A CN 96108774 A CN96108774 A CN 96108774A CN 1111717 C CN1111717 C CN 1111717C
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CN
China
Prior art keywords
wall
ridge
cools down
reinforced
reinforced wall
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Expired - Fee Related
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CN96108774A
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Chinese (zh)
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CN1140828A (en
Inventor
山本祐司
伊藤真二
古川裕一
武幸一郎
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Resonac Holdings Corp
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Showa Denko KK
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Publication of CN1140828A publication Critical patent/CN1140828A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/10—Making finned tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/151—Making tubes with multiple passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0316—Assemblies of conduits in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

A refrigerant tube for use in heat exchangers comprises a flat tube having parallel refrigerant passages in its interior and comprising upper and lower walls and a plurality of reinforcing walls connected between the upper and lower walls, the reinforcing walls extending longitudinally of the tube and spaced apart from one another by a predetermined distance. The reinforcing walls are each formed with a plurality of communication holes for causing the parallel refrigerant passages to communicate with one another therethrough. Each of the reinforcing walls is 10 to 40% in opening ratio which is the proportion of all the communication holes in the reinforcing wall to the reinforcing wall.

Description

The cooling tube that is used for heat exchanger
The present invention relates to be used to the to circulate pipe of cooling medium promptly is used for the cooling tube of heat exchanger, particularly relates to the condenser that is used for the motor vehicle air cooling system and the cooling tube of evaporimeter.
Reach term used in the claim " aluminium " herein and comprise fine aluminium and alloy aluminum.
JP-B-45300/1991 discloses the condenser that a kind of motor vehicle air cooling system is used, it comprises arranges about a pair of, parallel and be spaced apart from each other base, the opposed end of the flat cooling tubes that each is parallel is connected on two bases, the ripple wing be distributed in the circulation of air gap between the adjacent cooling tube and brazing on adjacent cooling tube, inlet tube is connected in the upper end of left base, delivery line is connected in the bottom of right base, left clapboard is in left base and be positioned at the top at the middle part of base, and right clapboard is in right base and be positioned at the below at base middle part, the number of the cooling tube between inlet tube and the left clapboard, the number of the cooling tube between left clapboard and the right clapboard, and the number of the cooling tube between right clapboard and the delivery line, successively decrease from the top down.The cooling medium that flows into inlet tube with gaseous state flow through condenser in a zigzag before liquid state flows out delivery line.The condenser of institute's description scheme is called PARALLEL FLOW or bull flow condensation device, has realized greater efficiency, lower pressure loss and ultra-compact, is widely used in replacing traditional coil condenser now.
Because cooling medium imports cooling tube with the gases at high pressure form, the flat cooling tubes that therefore is used for condenser need have pressure damping.For satisfying this requirement and realizing high heat exchanger effectiveness, the cooling tube of use is the aluminum flat tube form, and it contains and lower wall, and is connected in reinforced wall and the longitudinally extension that upward reaches between the lower wall.
Yet being produced on reinforced wall in the cooling tube, constituted independently parallel cooling medium road in the inside of pipe logical.The direction that air flows becomes vertical with parallel coolant guiding channel, and so, the heat exchanger effectiveness of the air leading-in end of coolant guiding channel must be higher than that the air derivation of passage holds.Therefore, be condensed into liquid hastily at the gaseous cooling medium of the upstream side of coolant guiding channel, and the cooling medium in the passage of downstream remains unchanged still simultaneously.When the total of cooling tube is considered, the mobile of cooling medium is uneven, can not reach high heat exchanger effectiveness.
The purpose of this invention is to provide a kind of cooler that is used for heat exchanger that reaches high heat exchanger effectiveness.
The invention provides and a kind ofly can realize the above-mentioned purpose cooling tube, this cooling tube includes flat tube, on the inside of flat tube has parallel coolant guiding channel and has and lower wall and one group be connected on and the reinforced wall between the lower wall, reinforced wall is along managing longitudinally extension and distributing in the unoccupied place to each other with preset distance, be shaped on one group of linked hole that is used for the parallel coolant guiding channel of UNICOM on each reinforced wall, so that link up each other, the aperture opening ratio of each reinforced wall is 10～40%, and aperture opening ratio is all linked holes on the reinforced wall and the ratio of reinforced wall.
Will flow through each linked hole of pipe by the cooling medium of parallel coolant guiding channel sidewards, be diffused into each part of all passages, the each several part of cooling medium is mixed.Therefore the cooling medium between each passage does not produce psychrometric difference, and its result makes cooling medium identical in the condensation process in upstream side and downstream.Flow evenly, realized improving the purpose of heat exchanger effectiveness.Aperture opening ratio is all linked holes on the reinforced wall and the ratio of this reinforced wall, its influence heat conduction.When aperture opening ratio is within 10～40% scopes, can obtain satisfied heat conduction, thus, the heat exchanger effectiveness of cooling tube can be further improved.Why aperture opening ratio is limited to 10～40% scope, be because: if aperture opening ratio less than 10% o'clock, heat conduction does not increase, if moreover aperture opening ratio surpass 40%, the heat conduction also no longer increases, only the increase that can bring coefficient of friction.The aperture opening ratio scope is 10～40%; 10～30% is comparatively desirable, and 20% is the most desirable.
Linked hole is considered to determine by following factor in the size on the cross section: cooling medium flow through between adjacent passage reposefully, is not subjected to the obstruction of the flow of solder material of generation probably in the brazing process, and the pressure damping that never damages cooling tube.The spacing of linked hole is definite like this: promptly cooling medium can flow through reinforced wall reposefully, and can not reduce the pressure damping of cooling tube.
The layout of the linked hole on one group of reinforced wall is being that what to interlock is the best when look down the top.
The spacing of reinforced wall on horizontal (width) of pipe preferably is up to 4mm.If spacing surpasses 4mm, will cause reducing heat exchanger effectiveness.
The height of reinforced wall preferably is up to 2mm.If highly surpass 2mm, the heat exchanger of making compactness is met difficulty, the damping of air duct also increases, and the result has reduced heat exchanger effectiveness.
Below with reference to the accompanying drawings, the present invention is described in more detail.
Fig. 1 is the profile of the flat cooling tubes of expression embodiments of the invention 1;
Fig. 2 is the partial enlarged drawing of pipe shown in Figure 1;
Fig. 3 is the partial enlarged drawing along the line 3-3 intercepting of Fig. 1;
Fig. 4 is a cutaway view, its expression be situation when being used to make the aluminium sheet of cooling tube of embodiments of the invention 1 with rolling process production;
Fig. 5 is a cutaway view, its expression be the situation of how on the upper limb of the ridge of aluminium sheet shown in Figure 4, making breach;
Fig. 6 is the cutaway view along the intercepting of the line 6-6 among Fig. 5;
Fig. 7 is a longitudinal sectional view, expression be breach how in a procedure, to make ridge and ridge upper limb;
Fig. 8 is local amplification stereogram, expression be processing embodiments of the invention 1 cooling tube the time situation;
Fig. 9 is the cutaway view according to the flat cooling tubes of embodiments of the invention 2;
Figure 10 is the cutaway view according to the flat cooling tubes of embodiments of the invention 3;
Figure 11 is the cutaway view according to the flat cooling tubes of embodiments of the invention 4;
Figure 12 is the cutaway view according to the flat cooling tubes of embodiments of the invention 5;
Figure 13 is the cutaway view according to the flat cooling tubes of embodiments of the invention 6;
Figure 14 is expression evaluation test 1 result's a curve map, i.e. relation between the average quality X of cooling medium and the heat conduction hA;
Figure 15 is expression evaluation test 2 results' curve map, i.e. relation between cooling medium average quality X and the heat transfer coefficient h;
Figure 16 is expression evaluation test 3 results' a curve map, be 20%, 50% or 80% o'clock promptly at the average quality X of cooling medium, relation between aperture opening ratio and the heat conduction hA, and the average quality X of cooling medium is 50% o'clock, the relation between aperture opening ratio and the coefficient of friction;
Figure 17 is expression evaluation test 4 results' a curve map, be 20%, 50% or 80% o'clock promptly at the average quality X of cooling medium, relation between aperture opening ratio and the heat transfer coefficient h, and be 50% o'clock at the average quality X of cooling medium, the relation between aperture opening ratio and the coefficient of friction f;
Figure 18 is expression evaluation test 5 results' a curve map, and promptly when having constituted the condenser that contains cooling tube, the pressure loss Δ Pr of cooling medium and the width of cloth are penetrated by the relation between the heat Q/Fa of unit front end area; And
Figure 19 is the front view that has used the condenser of flat cooling tubes in it.
Condenser shown in Figure 19 contains implements flat cooling tubes of the present invention.This condenser includes: a pair of base 61,62, and they are arranged in left and right-hand and each other in spaced apart abreast; Parallel flat cooling tubes 63, the opposite end portion of each cooling tube 63 is connected with two bases 61,62; Be arranged in the circulation of air gap between the adjacent cooling tube 63 and the corrugated fin 64 of brazing on adjacent cooling tube 63; With the joining inlet tube 65 in the upper end of left base 61; With the joining delivery line 66 in the lower end of right base 62; Preparation is inner and be positioned at left clapboard 67 above its middle part at left base 61; Preparation is in right base 62 inside and be positioned at the wherein right clapboard 68 of subordinate side.The number of the cooling tube 63 between inlet tube 65 and the left clapboard 67, the number of the cooling tube 63 between left clapboard 67 and the right clapboard 68, and the number of the cooling tube 63 between right clapboard 68 and the delivery line 66 successively decrease by above order.Pass condenser with cooling medium complications before flowing out delivery line 66 that gas form flows in the inlet tube 65 with liquid form (in a zigzag).
The cooling tube 63 that is used for above-mentioned condenser is relevant with the present invention.To describe below and implement cooling tube of the present invention.The aperture opening ratio of following embodiment all is 10～40%, and aperture opening ratio is all linked holes on each reinforced wall and the ratio of this reinforced wall; All linked holes of making on one group of reinforced wall all are interlaced arrangement.
Embodiment 1
Present embodiment is shown in Fig. 1 to 3.The cooling tube T1 that is used for heat exchanger is made of aluminum flat tube 7, pipe 7 portion within it has parallel coolant guiding channel 6 and includes: straight upper and lower wall 1,2, left and right vertical sidewall 3,4, wall 3,4 are bound up on respectively and reach between their margo dexter between the left border that reaches lower wall; And one group of reinforced wall 5, reinforced wall 5 is bound up on and reaches between the lower wall 1,2 along pipe longitudinal extension and each interval one preset distance.Make one group of rectangle linked hole 8 in each reinforced wall 5, be used for linking up parallel coolant guiding channel 6.
Aluminum flat tube 7 two blocks of aluminium sheets 9,10 is from top to bottom made, and is by connecting flat formation relative (two) lateral margin of lower plate 10 bending vertically with each lateral margin of crooked lateral margin and last aluminium sheet 9, so that form chamber portion with two blocks of aluminium sheets 9,10.
Reinforced wall 5 is by constituting from lower wall 2 inwardly protruded parallel ridges 11, and connects with the inner surface of upper wall 1.Rectangle linked hole 8 is made of rectangular indentation 12, and breach 12 prepares on the upper limb of each ridge 11 with predetermined interval and its opening is covered by upper wall 1.
Cooling tube T1 makes with following method.
With reference to figure 4, the brazing sheet that is coated with solder on the following surface is as the aluminium sheet blank that will process, and its thickness is gone up and the thickness of lower wall greater than cooling tube, at first with a pair of go up and under roller 13,17 carry out roll compacting.Upper roller 13 has: the parallel cannelure 14 of Fen Buing at interval; Make first small diameter portion 15 in each outside of the structure of groove 14, each part 15 all has the circumference with the bottom surface same diameter of groove 14; With second small diameter portion 16, part 16 is positioned at the outside of each first small diameter portion 15, and has than littler diameter of part 15 and bigger width.Following roller 17 is made on each outer end is furnished with major diameter part 18, and each part 18 has the outer face concordant with second small diameter portion 16, and has the width littler than part 16.The circumference table of roller 13,17 is forming straight portion 19, and part 19 is made lower wall 2 by making slab be thinned to certain thickness.Utilize cannelure 14, add son 13,17 and also make ridge 11, ridge 11 is also made integratedly from straight portion 19 projectioies.Moreover, make vertical part 20 at each lateral margin of straight portion 19, each vertical part 20 comprises with the contour interior shoulder 20a of portion of ridge 11 with from the upwardly extending thin-walled 20b of the outer rim of the 20a of shoulder portion.So, in the roll compacting operation, just made Rolling Aluminium Plate 21.
As illustrated in Figures 5 and 6, Rolling Aluminium Plate 21 is passed between the roller 22,24 on a pair of and down then.Last roller 22 has rectangular preiection 23, and on certain position, the parallel cannelure of each in the upper roller 13 that this position and last process use 14 is corresponding with arranged at predetermined intervals for this projection 23.This roll compacting operation has been made rectangular indentation 12 with predetermined interval on the upper limb of each ridge 11, thereby obtains lower aluminum sheet 10.
Projection 23 is arranged to interlock, and therefore when when the top is seen down, the breach 12 that is produced on the upper limb of parallel ridge 11 also becomes interconnected.
In order to make the ridge 11 with breach 12, the production method of above-mentioned manufacturing lower aluminum sheet 10 need be divided into for two steps.Yet, as shown in Figure 7, combine by the following roller 17 that utilizes the upper roller 26 and first operation, each the parallel cannelures 14 of ridge 11 upper rollers 26 that just can make these band breach 12 in single operation all have with the projection 25 of arranged at predetermined intervals and its height degree of depth less than groove.
On the other hand, prepare straight last aluminium sheet 9, last aluminium sheet 9 contains brazing sheet, and brazing sheet has relative (two) surface that every face has all covered the solder layer.As seen in Figure 8, the upper surface of last aluminium sheet 9 partly has outwards downward inclined-plane 27 in its each opposite side edges.With reference to figure 2, each side edge portions of last aluminium sheet 9 is placed on the 20a of shoulder portion of vertical part 20 of lower aluminum sheet 10, and thin-walled 20b (indicating with chain-dotted line), by bending on the inclined-plane 27 of last aluminium sheet 9.Secondly, the lower surface of upper plate 9 uses soldering on the top of the ridge 11 on the 20a of shoulder portion of the vertical part 20 of lower plate 10 and this place, thereby makes cooling tube T1.
The circumferential surface of upper roller 13 can be made groove and projection, and its cross section is the corrugated or annular knurl shape of triangle.Then, the lower aluminum sheet 10 of acquisition has projection and the groove that longitudinal extension runs through total inner surface, perhaps has the inner surface of lattice shape projection or groove.This increases the surface area of lower wall 2.
Embodiment 2
That Fig. 9 represents is this embodiment, promptly is used for the cooling tube T2 of heat exchanger.Pipe T2 is except having a double-deck left side and right side wall 28,29, and its structure is identical with embodiment's 1, and linked hole 30 falls trapezoidal; And one group lower, raising up 31 with lower wall 2 is made one, they longitudinally extend and distribute at each interval, to increase heat transfer surface area.Can form hole 30 by make trapeze cut 32 at the upper limb of ridge 11.
Pipe T2 contains aluminum flat tube 33, it becomes by following method method for making: will go up and the opposite side edges bending of following two blocks of aluminium sheets 34,35, one the lateral margin of bending in two blocks of aluminium sheets 34,35 is matched with the lateral margin of bending of another piece aluminium sheet respectively, and mating part is tied; So that constitute chamber portion with plate 34,35.
More particularly, sidewall the 28, the 29th is made with following method.On the opposite side edges of lower aluminum sheet 35, make the vertical part 36 contour respectively, make outside acclivitous inclined-plane 38 at the root edge of each vertical part 36 with reinforced wall 5.On the other hand, shown in the chain-dotted line among Fig. 9, made overhang 37 in each opposite side edges of last aluminium sheet 34, overhang 37 contacts with the vertical lateral surface of part 36 and protrudes downwards and exceed the lower surface of lower wall 2 slightly.The following protuberance 37a folding of overhang 37 is attached on each inclined-plane 38 of lower aluminum sheet 35, and part last and that lower aluminum sheet 34,35 contacts with each other welds with soldering.
Embodiment 3
That Figure 10 represents is this embodiment, promptly is used for the cooling tube T3 of heat exchanger, and it contains aluminum flat tube 39.Pipe 39 is prepared into by aluminium sheet 40, aluminium sheet 40 is brazing sheets, there is the solder layer on a surface (covering) at brazing sheet, as hair clip plate is folded up (brazing layer outwardly) from the middle part of its width, to form chamber portion, opposite side edges is bent into the shape of circular arc, and make lateral margin be in alignment with each other the contact and be tied.Therefore, pipe 39 has just had a left side and the right side wall 41,42 of band circular arc.Do making that concordant joint 43 is oblique like this in cross section, so as increase area above form joint 43.
Each reinforced wall 44 all is to form by the ridge 44b that connects downward ridge 44a and make progress, and ridge 44a is from upper wall 1 inwardly protruding, and ridge 44b is from following 2 inwardly protrudings.Each trapezoidal linked hole 5 all constitutes by a pair of trapezoidal scarce 45a, the combination of 45b.This breach 45a, 45b make on the lower edge of downward ridge 44a and on the upper limb of the ridge 44b that makes progress respectively with predetermined space.
Embodiment 4
That Figure 11 represents is this embodiment, promptly has the heat exchange cooling tube T4 of two kinds of reinforced walls 46.Each of a kind of wall 46 is made of downward ridge 46a, ridge 46a from upper wall 1 to projecting inward and connect with the straight inner surface of lower wall 2.Each of the wall 46 of other kind is made of the ridge 46b that makes progress, ridge 46b from lower wall 2 to projecting inward and connect with the straight inner surface of upper wall 1.The interlaced arrangement of two kinds of walls 46.Trapezoidal linked hole 47 is made of trapeze cut 47a, 47b.Breach 47a, 47b are prepared on the lower edge of downward ridge 46a and on the upper limb of the ridge 46b that makes progress, and their opening is by the institute capping in last and the lower wall 1,2.Except these characteristics, present embodiment is identical with embodiment 3.
Embodiment 5
That Figure 12 represents is this embodiment, i.e. heat exchanger cooling tube T5.Pipe T5 has the reinforced wall 48 that is made of downward ridge 48a, ridge 48a from upper wall 1 to projecting inward and link with the straight inner surface of lower wall 2.Trapezoidal linked hole 49 is made of trapeze cut 49a, and breach 49a makes on the lower edge of ridge 48a with predetermined space, and the opening of breach 49a is by 2 cappings of lower wall.Except that these characteristics, present embodiment is identical with embodiment 3.
Embodiment 6
That Figure 13 represents is this embodiment, i.e. heat exchange cooling tube T4, and this pipe T4 includes aluminum flat tube 50.Pipe 50 two blocks of aluminium sheets 51,53 is from top to bottom made by following method: the opposite side edges of two boards is bent into toward each other circular shape, to form chamber portion, the edge of plate is in alignment with each other and connects aligned edges.Except these characteristics, present embodiment is identical with embodiment 3.A left side and flush right joint 53,54 are the same with the situation of embodiment 3, are oblique in the cross section.
The aluminium sheet that has (structures) such as ridges and be applied in the previous embodiment can replace with the extrusion aluminum board with certain cross section.
To example of the present invention be described by comparative example below.The section shape of the cooling tube of example and comparative example as shown in Figure 1.
Example 1
One cooling tube, its length are 508mm, and the distance between the sidewall 3,4 is 16.5mm, on the height that reaches between the lower wall 1,2 be 1mm, the number of reinforced wall 5 is 6, the spacing of reinforced wall 5 is 2.4mm, and the thickness of reinforced wall 5 is 0.3mm, and the spacing P of linked hole 8 is 1.6mm, the length L of linked hole 8 is 0.8mm, and the height H of linked hole 8 is 0.2mm, and aperture opening ratio is 10%.
Example 2
Except the height of linked hole is that 0.4mm and aperture opening ratio are 20%, the cooling tube that all the other are identical with example 1.
Embodiment 3
Except the height of linked hole is that 0.6mm and aperture opening ratio are 30%, the cooling tube that all the other are identical with example 1.
Example 4
Except the height of linked hole is that 0.8mm and aperture opening ratio are 40%, the cooling tube that all the other are identical with example 1.
Comparative example
On reinforced wall, there is not the linked hole cooling tube that all the other are identical with example 1.
Evaluation test 1
The cooling tube of example 1 and comparative example is used for determining that cooling medium average quality X (percentage of evaporation quality in the cooling medium) and heat conducts the relation (h: heat transfer coefficient, A: the heat transfer area of cooling tube inside) between the hA.The method of determining is as follows.Cooling tube is placed in the cold water pipes, and the cooling medium that contains HFCl34a is by cooling tube, and cold water then passes through pipeline.Through after the certain time interval, the mass velocity G of cooling medium fixes on 400kg/m 2S, the introducing temperature of cooling medium is 65 ℃, and the heat flux between cooling medium and the cold water is 8kw/m 2The flow rate of cold water fixes on Reynolds number 1500.When the various numerical value of average quality X, measure heat conduction hA.
The result as shown in figure 14, its shows, when reinforced wall was shaped on linked hole, its heat conduction hA was when any average quality X numerical value during greater than no linked hole.
Evaluation test 2
The cooling tube of example 2 and comparative example is used for determining the average quality X of cooling medium and the relation between the heat transfer coefficient h that method therefor is identical with evaluation test 1.Figure 15 represents its result.
Figure 15 shows, when any average quality X numerical value, the heat transfer coefficient h when reinforced wall is shaped on linked hole is during greater than no linked hole.
Evaluation test 3
The cooling tube of example 1 to 4 and comparative example is used for determining that it is 20%, 50% or 80% o'clock relation that aperture opening ratio and heat are conducted between the hA at the average quality X of cooling medium, and is that 50% cooling medium Reynolds number is 10 at the average quality X of cooling medium between aperture opening ratio and the coefficient of friction 4The time relation, determine the identical of the method for relation and evaluation test 1, Figure 16 has represented its result.
When Figure 16 was presented at any value of average quality X, the heat conduction hA when reinforced wall is shaped on linked hole was during greater than no linked hole, and hot when aperture opening ratio is 20% to conduct hA big especially.
Evaluation test 4
The cooling tube of example 1 to 4 and comparative example is used for determining between aperture opening ratio and the heat transfer coefficient h that the average quality (X) at cooling medium is 20%, 50% or 80% o'clock relation, method therefor is identical with evaluation test 1, and be 50% at the average quality X of cooling medium between aperture opening ratio and the coefficient of friction f, Reynolds number is 10 4The time relation.Figure 17 has represented its result.
Figure 17 shows, when any value of average quality X, the heat transfer coefficient h when reinforced wall is shaped on linked hole is during greater than no linked hole, and aperture opening ratio is that 20% o'clock heat transfer coefficient is big especially.
Evaluation test 5
Three kinds of bull flow-type condensers shown in Figure 19 are to make with the cooling tube of example 2 or comparative example.More particularly, with 37 cooling tubes, and the ripple wing, its width is 22mm, highly is 7mm, reaches wing apart from being 1mm, (its width is 326mm, highly is 330.5mm, and frontal area is 0.108m to be used to make the core 2), and the relative termination of each cooling tube connects with right and left base.Relative base in I type (single channel) condenser is not provided with dividing plate.II type condenser, in left base its middle part above be provided with dividing plate, another dividing plate is located at the below at its middle part in the right base, 20 cooling tubes are positioned at the top of the dividing plate of left base, 11 cooling tubes are arranged between two dividing plates, and 6 cooling tubes are positioned at below the dividing plate of right base (triple channel).III type condenser has two dividing plates, lay respectively at top and lower part in the left base, be positioned at two dividing plates of right base inside, one on the centre position between two dividing plates of left base, and another is under the lower clapboard of left base, 12 cooling tubes are positioned at the top of the upper spacer of left base, 9 cooling tubes are between the upper spacer of the upper spacer of left base and right base, 7 cooling tubes are between the lower clapboard of the upper spacer of right base and left base, 5 cooling tubes are between the lower clapboard of the lower clapboard of left base and right base, and 4 cooling tubes are positioned at the lower clapboard below of right base (five-way road).Detected the relation between the thermal radiation amount Q/Fa of the pressure loss Δ Pr per unit frontal area of cooling medium in the condenser, it the results are shown in Figure 18.
Figure 18 shows, contains to be shaped on the storage heater that linked hole, aperture opening ratio are 20% cooling tube on the reinforced wall, and than the superior performance of the storage heater that contains the cooling tube that does not have linked hole on the reinforced wall, even when the pressure loss was identical, the former performance was also superior than the latter.

Claims (12)

1. cools down pipe, it includes aluminum flat tube, there is parallel coolant guiding channel and last flat tube inside, lower wall and one group of reinforced wall, reinforced wall is longitudinally extended and is distributed at each interval with preset distance along cooling tube, aluminum flat tube is made by aluminium sheet, each reinforced wall have from aluminium sheet projection and with aluminium sheet all-in-one-piece ridge, each reinforced wall all is shaped on one group of linked hole, to link up coolant guiding channel parallel to each other, the aperture opening ratio of each reinforced wall is 10～40%, and aperture opening ratio is the ratio of the area and the reinforced wall surface area of all linked holes on the reinforced wall.
2. cools down pipe as claimed in claim 1 is characterized in that, aperture opening ratio is 10～30%.
3. cools down pipe as claimed in claim 1 is characterized in that aperture opening ratio is about 20%.
4. as claim 1,2 or 3 described cools down devices, it is characterized in that the shape of linked hole is rectangle or trapezoidal.
5. as claim 1,2 or 3 described cools down pipes, it is characterized in that, the linked hole on one group of reinforced wall, when the top was seen down, they were interlaced arrangement.
6. cools down pipe as claimed in claim 1 is characterized in that aluminium sheet includes brazing sheet, and brazing sheet is coated with the solder layer at least one surface of the apparent surface of plate.
7. cools down pipe as claimed in claim 1, it is characterized in that, aluminum flat tube is to prepare by at least one opposite side edges that reaches in following two blocks of aluminium sheets in the bending, and each lateral margin of the lateral margin of bending and another piece aluminium sheet is linked, so that constitute chamber portion by two blocks of aluminium sheets.
8. cools down pipe as claimed in claim 1, it is characterized in that, aluminum flat tube is to prepare by the opposite side edges that reaches following two blocks of aluminium sheets in the bending, each of the lateral margin that makes one bending in two blocks of aluminium sheets and another piece aluminium sheet bending lateral margin matches, and the connection mating part, so that constitute chamber portion with two blocks of aluminium sheets.
9. cools down pipe as claimed in claim 1, it is characterized in that aluminum flat tube is to fold it by the width middle part at aluminium sheet to prepare, so that form chamber portion, at least one bending of the opposite side edges of plate, the lateral margin of bending is alignd with another lateral margin and connect them.
10. cools down pipe as claimed in claim 1, it is characterized in that, each reinforced wall is to be made of downward ridge and the ridge that makes progress, downward ridge from upper wall to projecting inward and be integral with upper wall, ridge upwards from lower wall to projecting inward and be integral with lower wall and connect mutually with downward ridge, and linked hole to be combination by opposed a pair of breach constitute, opposed breach is produced on the lower edge of downward ridge and on the upper limb of the ridge that makes progress and with predetermined spaced apart.
11. cools down pipe as claimed in claim 1, it is characterized in that, reinforced wall comprises that those are by downward ridge and those walls that is made of the ridge that makes progress, downwards ridge and upper wall is integral and from upper wall to projecting inward and link with the straight inner surface of lower wall, ridge upwards and lower wall is integral and from lower wall to projecting inward and link with the straight inner surface of upper wall, two kinds of reinforced wall interlaced arrangement, linked hole is made of breach, and breach is produced on the lower edge of downward ridge and on the upper limb of the ridge that makes progress and with predetermined spaced apart and have by the opening of institute capping in last and the lower wall.
12. cools down pipe as claimed in claim 1, it is characterized in that, each reinforced wall is made of ridge, the wall of ridge from last and lower wall, to projecting inward and be integral with this wall and link with the straight inner surface of another wall, linked hole is made of breach, and breach is produced on the edge of ridge and with spaced at predetermined intervals and have by the opening of the wall institute capping in last and the lower wall.
CN96108774A 1995-07-07 1996-07-05 Refrigerant tubes for heat exchangers Expired - Fee Related CN1111717C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP172007/95 1995-07-07
JP7172007A JPH0926278A (en) 1995-07-07 1995-07-07 Heat exchanger refrigerant flow pipe and car air-conditioner condenser
JP172007/1995 1995-07-07

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CN1140828A CN1140828A (en) 1997-01-22
CN1111717C true CN1111717C (en) 2003-06-18

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KR (1) KR100414852B1 (en)
CN (1) CN1111717C (en)
AR (1) AR002691A1 (en)
AT (1) ATE199456T1 (en)
AU (1) AU711980B2 (en)
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ES (1) ES2154366T3 (en)
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BR9602985A (en) 1998-04-28
EP0762070B1 (en) 2001-02-28
IN188905B (en) 2002-11-16
KR970007278A (en) 1997-02-21
TW296425B (en) 1997-01-21
JPH0926278A (en) 1997-01-28
CN1140828A (en) 1997-01-22
CA2180598C (en) 2007-06-05
DE69611868D1 (en) 2001-04-05
ZA965732B (en) 1997-01-23
KR100414852B1 (en) 2004-03-31
CA2180598A1 (en) 1997-01-08
EP0762070A1 (en) 1997-03-12
AU5834496A (en) 1997-01-23
MX9602646A (en) 1997-06-28
CZ9602008A3 (en) 1997-04-16
ES2154366T3 (en) 2001-04-01
CZ293383B6 (en) 2004-04-14
ATE199456T1 (en) 2001-03-15
MY119070A (en) 2005-03-31
AU711980B2 (en) 1999-10-28
DE69611868T2 (en) 2001-06-13
AR002691A1 (en) 1998-03-25

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