CN100377807C - Process for producing flat heat exchange tubes - Google Patents

Process for producing flat heat exchange tubes Download PDF

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Publication number
CN100377807C
CN100377807C CNB2003101165380A CN200310116538A CN100377807C CN 100377807 C CN100377807 C CN 100377807C CN B2003101165380 A CNB2003101165380 A CN B2003101165380A CN 200310116538 A CN200310116538 A CN 200310116538A CN 100377807 C CN100377807 C CN 100377807C
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CN
China
Prior art keywords
wall
heat exchange
exchange tubes
flat heat
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB2003101165380A
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Chinese (zh)
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CN1502428A (en
Inventor
齐藤好弘
田村乔
贝村哲
穗积敏
坂口雅司
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Resonac Holdings Corp
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Showa Denko KK
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Publication date
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Publication of CN1502428A publication Critical patent/CN1502428A/en
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Publication of CN100377807C publication Critical patent/CN100377807C/en
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • 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
    • 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
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/202—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with guides parallel to the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length

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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)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Metal Rolling (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

A process for producing a flat heat exchange tube having parallel refrigerant passages in its interior and comprising flat upper and lower walls, opposite side walls and a plurality of reinforcing walls connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another by a predetermined distance, using a rolling mill including a central work roll and a plurality of planetary work rolls arranged around a portion of the periphery of the central work roll and spaced apart circumferentially thereof, the central work roll being formed with parallel annular grooves in the periphery thereof. An aluminum sheet blank including a brazing sheet is rolled by the mill and thereby thinned to a predetermined thickness to form a flat portion serving as the lower wall, cause the annular grooves at opposite roll ends to form upright portions providing the respective side walls and the other annular grooves to form vertical ridges providing the reinforcing walls, the upright portions and the vertical ridges projecting from the flat portion integrally therewith. An aluminum sheet comprising a brazing sheet is placed over all the ridges to provide the upper wall and joined to the upright portions to make the upright portions serve as the opposite side walls, and the ridges of the lower wall are joined to the upper wall to form the reinforcing walls.

Description

The manufacture method of flat heat exchange tubes
Technical field
The present invention relates to the manufacture method of flat heat exchange tubes, relate in particular to the manufacture method of the flat heat exchange tubes in the heat exchangers such as the condenser that is used in the car cooler or evaporimeter.
Background technology
Recently, condenser in the car cooler such as Japanese patent application bulletin No.45300/91 are disclosed the sort of, are provided with a pair of collector that mutual sky is opened the left and right sides, compartment of terrain configured in parallel, the flat heat exchange tubes arranged side by side that two ends are connected with these two collectors respectively, between the heat-exchange tube of adjacency, disposing in the ventilation gap and by the corrugated fin of soldering on two heat-exchange tubes, be connected the inlet tube of collector upper end, left side, be connected the outlet of collector bottom, right side, be arranged on the left division board of the location inside, upper middle of left side collector, be arranged on the right division board of the location inside, lower middle of right side collector; The radical of the heat-exchange tube between the radical of the heat-exchange tube between the radical of the heat-exchange tube between inlet tube and left division board, left division board and right division board, right division board and outlet reduces successively from last beginning; The refrigerant of the gas phase that flows into from inlet tube is the shape that crawls and flows through condenser before being flowed out by outlet after becoming liquid phase.That is, the condenser of so-called advection type or multi-path type, this condenser is replacing former flexure type condenser, can present good characteristics such as high-performance, low pressure loss and microminiature owing to it and be widely used.
The above-mentioned flat heat exchange tubes that is used in the condenser imports owing to there is gases at high pressure refrigerant its inside, thereby the resistance to pressure requirement is arranged.In order to satisfy this requirement and to improve rate of heat exchange, all uses on the heat-exchange tube be provided with flat on lower wall and across on the member of aluminium hollow extrudate formation of lower wall and the enhancing wall that extends along its length.But, preferably make that flat heat exchange tubes forms thin-walled and reduce height as far as possible in order to improve rate of heat exchange and make the condenser miniaturization.But under the situation of using extrudate to make, because the restriction on the technology that is squeezed, thereby the attenuate of the reduction of pipe height and thickness is all limited.
In order to solve the above problems, known to United States Patent (USP) the 5th, 553, No. 377 disclosed such, with being provided with flat last lower wall, mutual sky across last lower wall and extension is along its length opened a plurality of enhancing walls that certain intervals is provided with, and the manufacture method of the flat heat exchange tubes that the inner flat metal tube that shape refrigerant pathway arranged side by side arranged constitutes, it is a pair roller up and down that annular groove arranged side by side is arranged with the roll of a side, the sheet metal that the pipe thickness of the heat-exchange tube that rolling wall ratio will be made is also thick, by the side face of roll with the wall thickness reduction of sheet metal after the pipe thickness of regulation, form either party par constitute upper wall and lower wall at least, forms the bar of vertically dashing forward that constitutes enhancing portion that is integral crowned from the par by annular groove simultaneously.
But, in the manufacture method of above-mentioned flat heat exchange tubes, owing to must make sheet metal successively by many milling trains, thereby the problem that whole manufacturing equipment is maximized is arranged.
The purpose of this invention is to provide a kind of manufacture method that can make the flat heat exchange tubes of whole manufacturing equipment miniaturization.
The manufacture method of flat heat exchange tubes of the present invention, this flat heat exchange tubes is provided with: the flat last lower wall that engages fin; Across last lower wall and extend along its length, sky is opened a plurality of enhancing walls that certain intervals is provided with mutually; And there is shape refrigerant pathway arranged side by side inside; It is characterized in that: it is made of following operation, promptly, use is provided with the central task roll and along the circumferential direction empty a plurality of satellite work rolls of opening the compartment of terrain setting on a part around the central task roll, and form from the center of its length symmetrical annular groove arranged side by side on either party periphery in central task roll and satellite work roll, and the empty milling train that is provided with the projection more shallow in annular groove arranged side by side than trench depth with opening certain intervals, the sheet metal of the thickness of pipe wall of the heat-exchange tube that will make by wall ratio of this mill milling, by the periphery of the periphery of central task roll and satellite work roll the reduced thickness of sheet metal is formed the par to the pipe thickness of regulation, form from the integrally formed prominent bar of par crowned by annular groove arranged side by side simultaneously, open certain intervals ground by the projection in the ditch at the upper limb sky of each prominent bar and form notch, and in the both side edges of sheet metal at least either party to the operation of the protuberance direction bending of prominent bar; With will have the metallic plate of notch to be bent into the hair clip shape on each prominent bar at the central portion of width, and both side edges docked combination, prominent down bar is combined with the bar of dashing forward up, strengthen wall to form, and make the notch combination of two prominent bars, form the operation of the intercommunicating pore that the refrigerant pathway that makes shape arranged side by side communicates with each other.
Preferably milling train also is provided with the guide block that is configured between the satellite work roll that adjoins each other and with the mechanism of guide block bullet to the central task roll.Thus, the extension when suppressing sheet metal towards its length direction by milling train, and also the inhibition sheet metal bloats between the satellite work roll of adjacency.Like this, can obtain having the rolled metal plate of the transverse shape of regulation by the work roll that is provided with annular groove arranged side by side.For the rolled metal plate of the transverse shape that positively obtains having regulation, preferably a plurality of satellite work rolls being configured to respect to its rolling gap of central task roll is that stenosis is narrow successively for direct of travel towards sheet metal.
Preferably being used at the arranged side by side roll that also forms annular groove of the shallow end arranged side by side in abutting connection with annular groove to each other of annular groove on either party of central task roll and satellite work roll, forming by annular groove when constituting the vertical prominent bar that strengthens wall from the par crowned is integrally formed, the low prominent bar that formation is used from the integrally formed increase heat transfer area of identical par crowned makes the heat exchanger effectiveness of heat-exchange tube increase thus.
And, preferably in arranged side by side annular groove, sky is provided with roll than the projection of the depth as shallow of ditch with opening certain intervals and is used on either party of central task roll and satellite work roll, form when constituting the vertical prominent bar that strengthens wall by annular groove, open a plurality of notch that intercommunicating pore that the formation of certain intervals ground is communicated with shape refrigerant pathway arranged side by side is to each other used at the upper limb sky of each prominent bar from the par crowned is integrally formed.
Flow, make refrigerant pathway to have refrigerant temperature difference ground that refrigerant is mixed each other though strengthen the intercommunicating pore of wall and be the refrigerant that makes by shape refrigerant pathway arranged side by side towards the width of flat heat exchange tubes, but, in each strengthens wall, whole intercommunicating pores with respect to the aperture opening ratio that strengthens the wall proportion preferably 10～40%.It is good that above-mentioned aperture opening ratio is made pyroconductivity, then can further improve the heat exchanger effectiveness of heat-exchange tube.Aperture opening ratio is less than 10%, and then pyroconductivity does not increase; Even surpass 40%, pyroconductivity does not increase, and this is owing at this moment only increase the cause of coefficient of friction.Above-mentioned aperture opening ratio can be in 10～40% the scope, but preferably 10～30%, then better about 20%.
The refrigerant that the size of the sectional area of intercommunicating pore is preferably made the refrigerant pathway that can make adjacency exchanges and to carry out fully, not when soldering by the scolder that flows down blocking problem, and the resistance to pressure of heat-exchange tube is reduced.In addition, the spacing of intercommunicating pore is preferably made the resistance to pressure that can not make heat-exchange tube and reduces, and the interchange of above-mentioned refrigerant is fully carried out.Preferably the intercommunicating pore of offering on a plurality of enhancing walls is made to see it is cross-over configuration from the plane.
In addition, the spacing on the pipe cross direction of enhancing wall is preferably below the 4mm.When the above-mentioned spacing that strengthens wall surpassed 4mm, heat exchanger effectiveness can reduce.The height that preferably strengthens wall is below the 2mm.When the height that strengthens wall surpassed 2mm, not only difficulty made the heat exchanger miniaturization, and can increase the resistance that air passes through heat exchanger effectiveness is reduced.
Below, further describe the present invention with reference to accompanying drawing.
Description of drawings
Fig. 1 is the cross-sectional view with the flat heat exchange tubes of the method manufacturing of the embodiment of the invention 1,
Fig. 2 is the cross-sectional view that amplify the part of flat heat exchange tubes shown in Figure 1,
Fig. 3 is the amplification profile diagram of obtaining along the 3-3 line of Fig. 1,
Fig. 4 roughly expresses the device schematic diagram of making the following structural member that flat heat exchange tubes shown in Figure 1 uses,
Fig. 5 is the amplification profile diagram of obtaining along the 5-5 line of Fig. 4,
Fig. 6 is the cross section stereogram that the side face of the center roll of device shown in Figure 4 is launched the part amplification of expression,
Fig. 7 is the cross-sectional view of the following structural member used of flat heat exchange tubes shown in Figure 1,
Fig. 8 be illustrated in the method for embodiment 1, the local amplification stereogram during last structural member and the combination of following structural member,
Fig. 9 is the enlarged cross sectional view that is illustrated in the aluminium plate that was rolled in advance on the pony rougher of device shown in Figure 4,
Figure 10 is illustrated in the method for embodiment 1, the cross-sectional view under last structural member and the following structural member assembled state,
Figure 11 is the stereogram that is illustrated in the method for embodiment 1, makes the temporary fixed device of structural member and following structural member,
Figure 12 is the cross-sectional view with the flat heat exchange tubes of the method manufacturing of the embodiment of the invention 2,
Figure 13 is the cross-sectional view that amplify the part of flat heat exchange tubes shown in Figure 12,
Figure 14 be illustrated in the method for embodiment 2, the stereogram during last structural member and the combination of following structural member,
Figure 15 is illustrated in the method for embodiment 2, the cross-sectional view under last structural member and the following structural member assembled state,
Figure 16 is with the method for the embodiment of the invention 3 cross-sectional view that make, flat heat exchange tubes,
Figure 17 is the cross section stereogram of the structural member used of flat heat exchange tubes shown in Figure 16,
Figure 18 is sectional drawing finishing mill, suitable with Fig. 5 of making the structural member of Figure 17,
Figure 19 is with the method for the embodiment of the invention 4 cross-sectional view that make, flat heat exchange tubes,
Figure 20 is the cross section stereogram of the structural member used of flat heat exchange tubes shown in Figure 19,
Figure 21 is with the method for the embodiment of the invention 5 cross-sectional view that make, flat heat exchange tubes,
Figure 22 is the cross section stereogram of the structural member used of flat heat exchange tubes shown in Figure 21,
Figure 23 is with the method for the embodiment of the invention 6 cross-sectional view that make, flat heat exchange tubes,
Figure 24 be the expression embodiment 6 method in, the cross section stereogram under last structural member and the following structural member assembled state,
Figure 25 is to use the front view of the condenser of flat heat exchange tubes of the present invention.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the invention are described.In the following description, " aluminium " this title except fine aluminium, also comprises aluminium alloy.And in whole accompanying drawings, identical part in addition and same section all put on same-sign, omits the explanation to its repetition.
Figure 25 represents to use the condenser of flat heat exchange tubes of the present invention.Condenser is provided with: sky is opened the parellel arranged a pair of collector of the certain intervals and the left and right sides (121,122) mutually; Two ends are connected to the flat heat exchange tubes (123) of the shape arranged side by side on the collector (121,122); Be configured in the ventilation gap between the adjacent heat-exchange tube (123) and be soldered to corrugated fin (124) on two heat-exchange tubes (123); The inlet tube (125) that connects left side collector (121) upper end; The outlet (126) that connects the bottom of right header (122); Be arranged on the left clapboard (127) of inside of the quadrate part position, upper middle of left side collector (121); Be arranged on the right clapboard (128) of inside of the quadrate part position, lower middle of right header (122); The radical of making the heat-exchange tube (123) between radical, right clapboard (128) and the outlet (126) of the heat-exchange tube (123) between radical, left clapboard (127) and the right clapboard (128) of the heat-exchange tube (123) between inlet tube (125) and left clapboard (127) reduces successively from last beginning, the gas phase refrigerant that flows into from inlet tube (125) is the shape that crawls and flows through condenser before being flowed out by outlet (126) becoming liquid phase.
Flat heat exchange tubes used on above-mentioned condenser is all relevant with the present invention.Below, the embodiment of flat heat exchange tubes of the present invention is described.All intercommunicating pores in following embodiment on each enhancing wall account for the aperture opening ratio of the ratio that strengthens wall and get into 10～40% entirely.And, be opened in intercommunicating pore on a plurality of enhancing walls, from the plane, be interconnected entirely.In addition, handle, apply then welding agent for braze to will take off ester by the member of soldering, before soldering.
Embodiment 1
Fig. 1～Figure 11 represents embodiment 1.Be provided with as Fig. 1～flat heat exchange tubes (A) shown in Figure 3, that make with the method for embodiment 1: soldering gelled flat last lower wall (1), (2); Across left and right sides wall on the left and right sides edge of last lower wall (1), (2), vertical (3), (4); Between left and right sides wall (3), (4), across last lower wall (1), (2) and extend along its length, sky is opened a plurality of enhancing walls (5) that certain intervals is provided with mutually; There is the refrigerant pathway (6) of shape arranged side by side inside.Adjoining each other on lower wall (2) strengthen between the wall (5), be integrally formed into the low prominent bar (7) that heat transfer area increases usefulness.Offering a plurality of trapezoidal intercommunicating pore (8) that the refrigerant pathway (6) that makes shape arranged side by side is interconnected in each upper end that strengthens wall (5).
Flat structural member (20) formation that goes up that flat heat exchange tubes (A) becomes the following structural member (10) of pectination by the cross section and constitutes upper wall (1).Above-mentioned structural member (10) down has the low prominent bar (7) that the par (11) of formation lower wall (2), the left and right sides erection part (12) that constitutes left and right sides wall (3), (4), the prominent bar (13) that constitutes enhancing wall (5) and heat transfer area increase usefulness.Stage portion (12a) with the upper limb equal height of prominent bar (13) is being set on the left and right sides erection part (12) of following structural member (10), and the top thin-walled protuberance (15) that links to each other with this stage portion is being set, on the both sides of last structural member (20), form make after above-mentioned top thin-walled protuberance (15) bending overlapping towards bottom incline (21).The trapezoidal cut portion (14) that formation intercommunicating pore (8) is arranged on each prominent bar (13).
Above-mentioned flat heat exchange tubes (A) is made as described below.
At first, with Fig. 4～device shown in Figure 6, form Fig. 7 and following structural member (10) shown in Figure 8.
In Fig. 4, making down, the device of structural member (10) is provided with uncoiler (31), pony rougher (32), finishing mill (33) and push rolls (34).Uncoiler (31) is the aluminium plate (30) of the aluminium brazing sheet formation that brazing material layer is simultaneously arranged so that brazing material layer batches in the mode of outer circumferential side.Quilt is batched at the aluminium plate (30) on the uncoiler (31) is sent to pony rougher (32) after uncoiler (31) debatching, be sent to finishing mill (33) afterwards, form down structural member (10) by finish rolling by pony rougher (32).
As shown in Figure 9, pony rougher (32) makes the outstanding with the brazing material layer opposition side of aluminium plate (30), to form heavy section (30a) in its both side edges portion.
A plurality of satellite work rolls (36) that finishing mill (33) is provided with central task roll (35) and equally spaced disposes on central task roll (a 35) top part on every side, along side face.A plurality of satellite work rolls (36) with respect to central task roll (35) so that rolling gap along metallic plate (30) direct of travel narrow down successively ground mode disposing.
Central task roll (35) is gone up the drive unit that does not have expression by figure and is driven rotation.Each satellite roll (36) by figure go up the geared system effect not have expression, with central task roll (35) interlock, by making central task roll (35) revolution, all peripheral speed rotation of satellite work rolls (36) to equate with center roll (35).And finishing mill (33) is provided with trapezoidal guide block (37) between the satellite work roll (36) that adjoins each other and with the spring (38) of trapezoidal guide block (37) bullet to central task roll (35).The front and back side edge part of guide block (37) with and central task roll (35) and satellite work roll (36) non-contiguously degree enter into the two.When aluminium plate (30) passed through finishing mill (33), guide block (37) suppressed aluminium plate (30) length direction and extends, and suppresses from expansion between the satellite work roll (36) of adjacency.The inhibition that aluminium plate (30) length direction extends also can be carried out with the revolution of the peripheral speed that equates with central task roll (35) by whole satellite work rolls (36).Because the extension of the length direction of aluminium plate (30) is suppressed, thereby can use the also thin sheet material of sheet material that wall ratio is previously used, be used as aluminium plate (30), thereby can reduce fee of material, use than in the past little reduction ratio and just can finish.
As shown in Figure 5 and Figure 6, on the side face of the central task roll (35) of finishing mill (33), form annular groove arranged side by side (39), (40) that whole degree of depth all equate, and except the annular groove (39) of left and right sides side, sky is being provided with the trapezoidal protrusion (43) than its depth as shallow with opening certain intervals in other annular grooves (40).The width of the annular groove of left and right sides side (39) is made into wide than other annular grooves (40), also forms the narrower annular groove of width (41) in its outer edge, bottom surface.In side by side annular groove (39), (40) in abutting connection with also forming annular groove of the shallow end (42) arranged side by side between the annular groove.
Make both sides form heavy section (30a), the aluminium plate shown in Figure 9 (30) that forms thinner wall section (30b) in their middle part is rolled between by central task roll (35) and a plurality of satellite roll (36), as shown in Figure 7, make its wall thickness reduction up to specific thickness, form the par (11) that constitutes lower wall (2), and by annular groove (39), (40) be whole formation the in crowned ground from the par and constitute left and right sides sidewall (3), (4) rising portions (12) and the vertical prominent bar (13) that constitutes enhancing wall (5), and by the upper limb of the projection (43) in the ditch (40) at each prominent bar (13), sky is opened certain intervals landform notch (14) in echelon, and be from same flat portion (11) by ditch (42) that crowned ground is whole to form the prominent bar (7) that heat transfer area increases usefulness, also be provided with on the top of the thick left and right sides rising portions (12) of the prominent bar (13) of wall ratio and the stage portion (12a) of the upper limb equal height of the bar (13) of dashing forward and coupled top thin-walled protuberance (15) by the narrower annular groove of width (41).
Now, the wall thickness T that the above-mentioned whole width W of structural member (10) down shown in Figure 7 that be shaped is got into 18mm, par (11) is 0.35mm; The height H of left and right sides rising portions (12) is 1mm; Its wall thickness T 1Be 1.4mm; The height H of top thin-walled protuberance (15) is 0.65mm; Its wall thickness T 2Be 0.4mm; The height H 2 of prominent bar (13) is 1mm; Its wall thickness T 3Be 0.4mm; The prominent mutual spacing P of bar (13) is 0.8mm; The height H 3 that heat transfer area increases the low prominent bar (7) of usefulness is 0.2mm; Its wall thickness T 4 is 0.2mm.Under this occasion, if the width of as shown in Figure 9 aluminium plate (30) is decided to be W; The amplitude of heavy section (30a) is W 1The wall thickness of thinner wall section (30b) is t; The wall thickness of heavy section (30a) is t 1, then W=18mm, W 1=1.34mm, t=0.57mm, t 1During=1.13mm, W=18mm, W 1=1.49mm, t=0.62mm, t 1During=1.19mm and W=18mm, W 1=1.63mm, t=0.68mm, t 1During=1.25mm, can form down structural member (10) according to above-mentioned design size.
To be that the opposition side by the brazing material layer that makes it is outstanding forms heavy section (30a) to the aluminium plate of Fig. 9 (30), but also can be in contrast, make brazing material layer side-prominent or to two side-prominent and formation heavy sections.
Different with following structural member (10), last structural member (20) is to use such structure (referring to Fig. 8), promptly outwards form above the flat aluminium sheet both side edges portion that the aluminium brazing sheet that covers with brazing material layer on the two sides constitutes, inclined plane (21) down, the both side edges portion of last structural member (20) is placed on down on the stage portion (12a) of left and right sides rising portions (12) of structural member (10), with the inwardly bending of top thin-walled protuberance (15) of left and right sides rising portions (12), closely overlapping with two inclined planes of last structural member (20).Such up-down structure spare (10), (20) tighten up temporarily operation with as shown in figure 11, be provided with 1 pair of forming rolls (80) up and down that top thin-walled rising portions (15) bending is used and tighten up temporarily from 1 pair of pinch roll (81) up and down of up and down up-down structure spare (20), (10) being clamped that mechanism carries out continuously.
Then, the workpiece that temporarily tightens up cuts into the length of regulation by shearing machine, makes the heat-exchange tube intermediate.Above-mentioned cut-out be along intermediate short transverse, promptly carry out from the top or from the below.Like this, can prevent the distortion of left and right sides rising portions (12) and prominent bar (13).If along the width of intermediate, promptly cut off, the problem that makes left and right sides rising portions and the distortion of prominent bar is arranged then from left or from right-hand.
Above-mentioned heat-exchange tube intermediate and collector and fin combination, the in addition soldering of blanket ground.Thus, across going up and be placed on the upper wall (1) of last structural member (20) the formation flat heat exchange tubes (A) above it at whole prominent bars (13), and, by on the stage portion (12a) of last structural member (20) soldering two rising portions (12) of thin-walled protuberance (15) and following structural member (10) above by bending, make two rising portions (12) form left and right sides sidewall (3), (4), simultaneously each prominent bar (13) of lower wall (2) being soldered to upper wall (1) goes up and formation enhancing wall (5), and by using upper wall (1) the opening portion obturation of the trapezoidal cut portion (14) of each prominent bar (13), form the mutual trapezoidal intercommunicating pore (8) that is communicated with of the refrigerant pathway (6) that makes shape arranged side by side.Just obtain flat heat exchange tubes (A) thus.
In above-mentioned soldering, after up-down structure spare (20), (10) were tightened up temporarily, technologies such as available high frequency brazing method were lived both solderings in advance.And, above-mentioned tighten up temporarily after, up-down structure spare (20), (10) soldering are formed after the heat-exchange tube finished product, when the assembling heat exchanger with it and collector with fin soldering be in the same place.
Embodiment 2
Figure 12～Figure 15 is the figure of expression embodiment 2.
The flat heat exchange tubes made from the method for embodiment 2 (A1) is as Figure 12 and shown in Figure 13, and except left and right sides sidewall (50), (51) formed dual structure, all the other were all identical with embodiment 1.
Flat heat exchange tubes (A1) is by structural member (60) and last structural member (70) constitute down, but in following structural member (60), left and right sides rising portions (61) has height and the thickness identical with prominent bar (5), forms the face (62) that is inclined upwardly below the both side edges portion of par (11) outwardly; And, in last structural member (70), on both side edges, form the roughly identical portion that hangs down (72) of thickness with rising portions (61), two bottoms of hanging down portion (72) are overlapped on the above-mentioned face (62) that is inclined upwardly outwardly by bending, and the side attenuated in its cross section was made downwards, last structural member (70) has two portions that hang down (72) is overlapped down width on the outside of rising portions (61) of structural member (60), and these, all the other are all identical with embodiment 1 except that above-mentioned.
Above-mentioned flat heat exchange tubes (A 1) make as described below.
At first, except that following, use the identical Fig. 4～device shown in Figure 6 of employed device in the method with embodiment 1, to form structural member (60) (with reference to Figure 14) above-mentioned time.
At this moment, said apparatus is not established pony rougher (32).Like this, the flat aluminium plate that the brazing sheet that simultaneously has brazing material layer is constituted is sent into finishing mill (33).And, be arranged on the width of the annular groove arranged side by side on central task roll (35) side face of finishing mill (33) and the degree of depth and be made into equally entirely, have only each the ditch bottom surface and the ditch lateral surface of the annular groove of left and right sides side to form with the inclined plane ways of connecting.
Different with following structural member (60), last structural member (70) is the aluminium sheet that constitutes with the aluminium brazing sheet that the two sides is covered by brazing material layer, and is provided with the portion of hanging down (72) in its both side edges.The height of two portions that hang down (72) is made into higher slightly than two rising portions (61), and the side attenuated in the cross section of the bottom of these portions that hang down (73) was made into downwards.
Then, as shown in figure 15, last structural member (70) is covered down on the structural member (60) with rabbeting, the inwardly bending of the bottom (73) of two portions that hang down (72) of last structural member (70), make its inclined plane (62) closely overlapping, two structural members (60), (70) are tightened up temporarily with following structural member (60).After this, obtain flat heat exchange tubes (A after the processing similarly to Example 1 1).
Embodiment 3
Figure 16～Figure 18 represents the figure of embodiment 3.
Flat heat exchange tubes (the A that makes with the method for embodiment 3 2), as shown in figure 16, be provided with: flat last lower wall (86), (87) of soldering fin; Leap on the left and right sides edge of last lower wall (86), (87), the outside is circular-arc left and right sides wall (85), (88); Between left and right sides wall (85), (88), open a plurality of enhancing walls (89) that certain intervals is provided with across last lower wall (86), (87) and extension along its length and mutual sky; There is the refrigerant pathway (74) of shape arranged side by side inside.Offering a plurality of hexagon intercommunicating pores (90) that the refrigerant pathway (74) that makes shape arranged side by side communicates with each other at each position, center that strengthens the height of wall (89).
Flat heat exchange tubes (A 2) constitute by 1 structural member (94).As shown in figure 17, structural member (94) is provided with the central par (92) of formation right side wall (88) in the central authorities of width, is respectively equipped with right par (91), prominent bar (89a) that forms the first half that strengthens wall (89) that forms upper wall (86) and the outside arcus part (85a) that forms the first half of left side wall (85) on its right side; Be respectively equipped with left par (93), prominent bar (89b) that forms the Lower Half that strengthens wall (89) that forms lower wall (87) and the outside arcus part (85b) that forms the Lower Half of left side wall (85) in the left side of central par (92).On each prominent bar (89a), (89b), be provided with the first half that forms intercommunicating pore (90) respectively and trapezoidal cut portion (90a), (90b) of Lower Half.
Above-mentioned flat heat exchange tubes (A 2) make as described below.
Except that following, use employed device is identical in the method with embodiment 1 Fig. 4 and device shown in Figure 5, formation said structure spare (94).
At this moment, said apparatus is not established pony rougher (32).Like this, one side has the flat aluminium plate of the brazing sheet formation of brazing material layer to be admitted to finishing mill (33).As shown in figure 18, on the side face of the central task roll (35) of finishing mill (33), formation is from the center annular groove that begin, that left-right symmetry is arranged side by side (97) of its length, and in annular groove (97) side by side, sky is provided with the shallow projection of depth ratio trench depth (99) with opening certain intervals.The right side of annular groove arranged side by side (97) on the right side forms the right-hand member annular groove (95) that depth ratio annular groove (97) dark and wider width and bottom surface and vertical medial surface link to each other with the inclined plane; The left side of annular groove arranged side by side (97) on a left side forms dark and wider width of depth ratio annular groove (97) and bottom surface and makes the left end annular groove (96) that inclined plane, its upper end and vertical outer face are connected with step.The right part of satellite work roll (36) is provided with the right flange (98a) that the bottom surface of side face and right-hand member annular groove (95) joins, be provided with the left flange (98b) that the stage portion of side face and left end annular groove (96) is joined in the left part, the inner face of two flanges (98a), (98b) is formed concave arc shape.
Use is provided with milling train (33) the aluminum sheet material (30) of above-mentioned central task roll (35) and a plurality of satellite work roll (36), the thickness of aluminium plate (30) is rolled into the pipe thickness of regulation by the side face of the side face of central task roll (35) and satellite work roll (36), form central par (92), right par (91) and left par (93), and (91), (92) crowned ground integral body form prominent bar (89a), (89b) from the par by annular groove arranged side by side (97); And by the projection (99) in the ditch (97) at each prominent bar (89a), upper limb sky (89b) is opened certain intervals landform notch (90a) in echelon, (90b), and both side edges formed to prominent bar (89a), the outside arcus part (85a) of protuberance direction bending (89b), (85b), each prominent bar (89a), notch (90a) is arranged (89b), Rolling Aluminium Plate (90b), be that structural member (94) is bent into the hair clip shape and forms right side wall (88) at the central portion of width, both side edges to the ground connection soldering, to outside arcus part (85a) up and down, (85b) form left side wall (85), and strengthen wall (89) forming after prominent bar (89a) and upwards prominent bar (89b) soldering downwards in conjunction with the back; The trapezoidal cut portion (90a) of two prominent bars (89a), (89b), (90b) combination, the hexagon intercommunicating pore (90) that place's formation communicates with each other the refrigerant pathway (74) of shape arranged side by side in the middle of the height of each enhancing wall.Like this, just obtain flat heat exchange tubes (A 2).
Embodiment 4
Figure 19 and Figure 20 represent the figure of embodiment 4.
As shown in figure 19, the flat heat exchange tubes (A that makes with the method for embodiment 4 3) be that trapezoidal intercommunicating pore (101) is positioned at the enhancing wall (100) of its upper end and enhancing wall (100) that trapezoidal intercommunicating pore (101) is positioned at its lower end alternately stem for stem, all the other are identical with embodiment 1 except that this puts.
Flat heat exchange tubes (A3) is made of 1 structural member (102).As shown in figure 20, structural member (102) is provided with respectively at the right par (91) that width central authorities form the central par (92) of right side wall (88), (92) right side forms upper wall (86) in the par, the prominent bar (100a) that formation strengthens wall (100) and the outside arcus part (85a) that forms the first half of left side wall (85); (92) left side forms the outside arcus part (85b) of the Lower Half of the left par (93) of lower wall (87), the prominent bar (100b) that forms enhancing wall (100) and formation left side wall (85) in the par.On each prominent bar (100a), (100b), be provided with the trapezoidal cut portion (101a), (101b) that form intercommunicating pore (90).The prominent bar (100a) of right par (91) side lacks one at least than the prominent bar (100b) of left par (93) side, and is offset 1/2 spacing to the margo dexter direction of structural member (102).
Except that following this point, be to make above-mentioned flat heat exchange tubes (A3) similarly to Example 3.Promptly, with regard to the roll of center, be with the central task roll difference of embodiment 3: all arranging annular groove side by side though hit exactly to the left and right both sides from its length, but each bar annular groove on right side than each bar annular groove in left side all to the right the lateral margin direction be offset 1/2 spacing, its number is also lacked one, and the degree of depth of annular groove is a times of the annular groove degree of depth of embodiment 3.
What form by this central task roll, at the prominent bar (100a) of each bar, notch (101a) is arranged (100b), Rolling Aluminium Plate (101b) is structural member (102), be bent into hair clip shape ground at the width central portion and form right side wall (88), and after the both side edges butt joint soldering, with two following outside arcus parts (85a), (85b) the butt joint back forms left side wall (85), and each prominent bar (100b) of each prominent bar (100a) of upper wall (86) and lower wall (87) alternately is soldered to respectively mutually on the par of the par of lower wall (87) and upper wall (86), and locate each prominent bar (100a) in the par, trapezoidal cut portion (101a) (100b), opening portion (101b) is stopped up, form the trapezoidal intercommunicating pore (101) that the refrigerant pathway (74) make shape arranged side by side communicates with each other thus, and these intercommunicating pores are that alternatively up and down ground is formed on the shape enhancing wall arranged side by side (100).Like this, just make flat heat exchange tubes (A3).
Embodiment 5
Figure 21 and Figure 22 represent the figure of embodiment 5.
The flat heat exchange tubes made from the method for embodiment 5 (A4) as shown in figure 21, except trapezoidal intercommunicating pore (106) this point of lower end, identical with embodiment 1.
Flat heat exchange tubes (A4) is made of 1 structural member (107).As shown in figure 22, structural member (107) be respectively equipped with in width central authorities and form the central par (92) of right side walls (88), form on its right side upper wall (86) right par (91), form prominent bar (105a) that strengthens wall (105) and the outside arcus part (85a) that forms the first half of left side wall (85), form the outside arcus part (85b) of the Lower Half of the left par (93) of lower wall (87) and formation left side wall (85) in the left side of central authorities.On each prominent bar (105a), be provided with the trapezoidal cut portion (106a) that forms intercommunicating pore (106).
Except that following this point, make above-mentioned flat heat exchange tubes (A4) similarly to Example 3.That is, with regard to the central task roll, be with the difference of the central task roll of embodiment 3: from it the length center, be provided with annular groove arranged side by side on the right side, and the degree of depth of annular groove is a times of the annular groove degree of depth of embodiment 3.
To form by this central task roll, the Rolling Aluminium Plate that notch (106a) is arranged on each prominent bar (105a) is that structural member (107) forms right side wall (88) after the central portion of width is bent into the hair clip shape, and both side edges docked soldering, to outside arcus part (85a) up and down, (85b) dock and formation left side wall (85), simultaneously each prominent bar (105a) soldering of upper wall (86) on the par of lower wall (87), it is formed strengthen wall (105), and by the opening portion of the trapezoidal cut portion (106a) of each prominent bar (105a) is stopped up with the par, the trapezoidal intercommunicating pore (106) that formation is communicated with shape refrigerant pathway arranged side by side (74) to each other, and it is formed on the lower end that each strengthens wall (105).Like this, make flat heat exchange tubes (A4).
Embodiment 6
Figure 23 and Figure 24 represent embodiment 6.
As shown in figure 23, the flat heat exchange tubes made from the method for embodiment 6 (A5) except right side wall (110) outside be circular-arc, inner face be vertical, all the other are identical with embodiment 1.
As shown in figure 24, flat heat exchange tubes (A5) is made of upper and lower 2 members (112), (114).That is, last structural member (112) is provided with outside arcus part (85a), (110a) of the first half of the par (111) that forms upper wall (86), the prominent bar (89a) that forms the first half that strengthens wall (89) and formation left and right sides sidewall (85), (110) down.Following structural member (114) is provided with outside arcus part (85b), (110b) of the Lower Half of the par (93) that forms lower wall (87), the prominent bar (89b) that forms the Lower Half that strengthens wall (89) and formation left and right sides sidewall (85), (110) up.Each prominent bar (89a), (89b) are provided with the first half that forms intercommunicating pore (90) respectively and trapezoidal cut portion (90a), (90b) of Lower Half.
Above-mentioned flat heat exchange tubes (A5) is made as described below.
Except that following point,, form up-down structure spare (112), (114) with 2 Fig. 4 identical and device shown in Figure 5 with the method for embodiment 1.
At this moment, the center roll (35) of the finishing mill of one of them device (33) is made following shape with the cross section of satellite roll (36): the right-hand member ditch (95) of the central task roll (35) among Figure 18 and the flange (98a) of satellite work roll (36) are formed identical, symmetrical shape with the former left end ditch (96) and the latter's flange (98b), and between the ditch of two ends, the left and right sides, only form a side annular groove arranged side by side.Central task roll (35) at the finishing mill (33) of another device is made following shape with the cross section of satellite roll: left end ditch (96) and the flange (98b) of satellite work roll (36) and the former the right-hand member ditch (95) and the latter's flange (98a) of the central task roll (35) among Figure 18 is formed identical, symmetrical shape, between the ditch of two ends, the left and right sides, only form a side annular groove arranged side by side.
Aluminium plate with the brazing sheet formation that brazing material layer is arranged on two rolling two sides of roll mill, the reduced thickness of aluminium plate is formed par (111) to specific thickness, (113), form from the par (111) by annular groove, (113) be the integrally formed prominent bar of crowned (89a), (89b), and by the projection in the ditch at the prominent bar (89a) of each bar, upper limb sky (89b) is opened certain intervals landform notch (90a) in echelon, (90b), and the prominent bar (89a) in both side edges edge, protuberance direction bending (89b), form outside arcus part (85a), (110a), (85b), (110b), is resulting 2 Rolling Aluminium Plate up-down structure spare (112), (114) engage vis-a-vis, and both side edges docked soldering to each other, to outside arcus part (85a) up and down, (110a), (85b), (110b) in conjunction with and make left and right sides sidewall, and up-down structure spare (112), (114) par (111), (113) as last lower wall (86), (87), strengthen wall (89) forming in prominent bar (89a) and upwards prominent bar (89b) soldering downwards, and make two prominent bars (89a), trapezoidal cut portion (90a) (89b), (90b) combination is formed on the central authorities that each strengthens the height of wall (89) with the hexagon intercommunicating pore (90) that is communicated with the refrigerant pathway (74) of shape arranged side by side.So just obtain flat heat exchange tubes (A5).
On the lower wall, also can similarly form the low prominent bar that heat transfer area increases usefulness on the upper wall of the flat heat exchange tubes in the foregoing description 1 and embodiment 2 and the flat heat exchange tubes among the embodiment 3～6 with the lower wall of embodiment 1.
In above-mentioned all embodiment, though all be to form various annular grooves on the central task roll of finishing mill, also alternative central task roll forms various annular grooves on the satellite work roll.
In above-mentioned all embodiment, though all be when making aluminium plate pass through finishing mill, on prominent bar, form notch, also can form notch in addition one by one by after the finishing mill.At this moment, need not on the bottom surface of the annular groove of central work roll, projection be set.

Claims (7)

1. the manufacture method of a flat heat exchange tubes, this flat heat exchange tubes is provided with: the flat last lower wall that engages fin; Across last lower wall, and extend along its length, sky is opened a plurality of enhancing walls that certain intervals is provided with mutually; And there is shape refrigerant pathway arranged side by side inside; It is characterized in that: it is made of following operation, promptly, use is provided with the central task roll and along the circumferential direction empty a plurality of satellite work rolls of opening the compartment of terrain setting on a part around the central task roll, and form from the center of its length symmetrical annular groove arranged side by side on either party periphery in central task roll and satellite work roll, and the empty milling train that is provided with the projection more shallow in annular groove arranged side by side than trench depth with opening certain intervals, and described milling train forms annular groove of the shallow end of shape arranged side by side annular groove arranged side by side to each other in abutting connection with annular groove, the sheet metal of the thickness of pipe wall of the heat-exchange tube that will make by wall ratio of this mill milling, by the periphery of the periphery of central task roll and satellite work roll the reduced thickness of sheet metal is formed the par to the pipe thickness of regulation, form from the integrally formed prominent bar of par crowned by annular groove arranged side by side simultaneously, open certain intervals ground by the projection in the ditch at the upper limb sky of each prominent bar and form notch, and similarly forms the low prominent bar that heat transfer area increases usefulness from the par crowned is whole by annular groove of the shallow end of shape arranged side by side, and in the both side edges of sheet metal at least either party to the operation of the protuberance direction bending of the bar of dashing forward; With will have the metallic plate of notch to be bent into the hair clip shape on each prominent bar at the central portion of width, and both side edges docked combination, prominent down bar is combined with the bar of dashing forward up, strengthen wall to form, and make the notch combination of two prominent bars, form the operation of the intercommunicating pore that the refrigerant pathway that makes shape arranged side by side communicates with each other.
2. as the manufacture method of the heavy described flat heat exchange tubes of claim, it is characterized in that: milling train is provided with the guide block that is provided between the satellite work roll that adjoins each other.With with the mechanism of guide block bullet to the central task roll.
3. the manufacture method of flat heat exchange tubes as claimed in claim 1 is characterized in that: a plurality of satellite work rolls be configured to respect to the central task roll rolling gap, stenosis is narrow successively towards the direct of travel of sheet metal.
4. the manufacture method of flat heat exchange tubes as claimed in claim 1, it is characterized in that: sheet metal is to have the brazing sheet of brazing material layer to constitute by at least one mask in the two sides.
5. the manufacture method of flat heat exchange tubes as claimed in claim 1, it is characterized in that: notch is trapezoidal.
6. the manufacture method of flat heat exchange tubes as claimed in claim 1 is characterized in that: strengthening on wall at each, is 10-40% as the area of whole intercommunicating pores with respect to the aperture opening ratio of the area proportion that strengthens wall.
7. the manufacture method of flat heat exchange tubes as claimed in claim 1 is characterized in that: the intercommunicating pore of a plurality of enhancing walls with the relation of the enhancing wall of adjacency on be interconnected.
CNB2003101165380A 1995-12-28 1996-12-27 Process for producing flat heat exchange tubes Expired - Fee Related CN100377807C (en)

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EP0781610A2 (en) 1997-07-02
MX9700009A (en) 1997-09-30
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MY114328A (en) 2002-09-30
CN1153041C (en) 2004-06-09
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CZ294169B6 (en) 2004-10-13
CA2193933A1 (en) 1997-06-29
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JP3381130B2 (en) 2003-02-24
AU710857B2 (en) 1999-09-30

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