CN101496446A

CN101496446A - Metal thermal energy dissipating element, traversed by an air stream and an electric current

Info

Publication number: CN101496446A
Application number: CNA2007800280231A
Authority: CN
Inventors: 克里斯托弗·阿洛普; 詹斯-彼得·阿尼森; 劳伦特·德拉福格
Original assignee: Valeo Systemes Thermiques SAS
Current assignee: Valeo Systemes Thermiques SAS
Priority date: 2006-05-24
Filing date: 2007-05-21
Publication date: 2009-07-29
Also published as: WO2007135644A1; EP2022293A1; PL2022293T3; FR2901658B1; EP2022293B1; FR2901658A1; ES2421597T3

Abstract

The invention concerns a metal element (2) traversed by an air stream, comprising an upper longitudinal wall (6a), a lower longitudinal wall (6b), and two lateral walls (6c) as well as plural fins, at least one of the longitudinal walls (6a, 6b) of said metal element (2) being formed by a series of flats, said flats being rigidly linked together (23) such that at least one of the planar longitudinal walls (6a, 6b) circulates en electric current form one end to the other end of said planar longitudinal wall.

Description

The heat radiating metal element that passes through by air-flow and electric current

Technical field

The present invention relates to a kind of hardware of a part of the heating rod that constitutes electric heater.The present invention can be to the air-flow heating by electric heater.The present invention be more particularly directed to a kind of hardware simple in structure and manufacture method thereof.The present invention is applicable to automotive field, is specially adapted to the field of air-conditioning system.

Background technology

In automotive field, the comfort problem in the automobile bodies is a matter of utmost importance.For this reason, a scheme improving comfort of passenger is exactly the air in the rapid vehicle cabin, and is particularly all the more so in the winter time the time.In order to satisfy passenger's requirement, in aircondition, introduce an auxiliary electro-heat device.This electric heater comprises some heating rods, and when automobilism, these heating rods are elements that assurance is heated the air-flow by aircondition.

Therefore this electric heater can improve comfort level.But the manufacturing cost of this electric heater is higher.In fact, the heating rod that constitutes electric heater is somewhat expensive member, because long, the used material of their built-up time is many and expensive and to form the parts number of rod more.

For this reason, document GB 2 076 270 has introduced some flat resistive elements, is coated with metal on each face of resistive element, and the face that each of a hardware and resistive element is coated with metal electrically contacts.In order to reduce manufacturing cost, omitted along the electrode of the brass material of hardware setting.In order to ensure the conductivity to resistive element, hardware is simultaneously as radiator with at the connection device that is electrically connected between resistive element and the power supply.

Yet this metalloid element has a very big defective.According to its structure, these hardwares form voltage drop between end that connects with power supply and the end opposite with power supply.Like this, inhomogeneous along hardware to the power supply of resistive element, with the end of the hardware that is connected power supply from resistive element farthest operating mode not as with the operating mode of the end that is connected power supply from resistive element that must be closely.

Summary of the invention

This scheme that the present invention is perfect, a kind of hardware of being crossed by air communication is proposed, this hardware comprises vertical wall on, vertical once wall and two sidewalls and a plurality of blade, vertically at least one in the wall formed by a series of flat, described flat utilizes firm connector to link to each other to each other, thereby in flat vertical wall at least one is delivered to the other end with electric current from an end of described flat vertical wall.

The present invention can obtain uniform voltage by using a kind of hardware between these hardware two ends, number of steps when limiting manufacturing cost simultaneously and heating rod being installed, flat vertical wall of described hardware itself constitutes the electrode that electric current is delivered to equably the other end from an end of hardware.The flat that forms a succession of firm connection of flat vertical wall can improve the heat dispersion of blade, that is to say that these flats have improved the thermo-contact between oilstone CTP (pierre CTP) and the blade.Because vertically wall is flat, so the contact-making surface between hardware and the resistive element is very big, the heat that resistive element is shed propagates into blade well.

First flat advantageously is between two blades, crossing between this flat and this two blades realized by first pleat and second pleat, second flat advantageously is between two blades, crossing between this second flat and this two blades realizes that by the 3rd pleat and the 4th pleat the firm connector between adjacent two flats is between second pleat and the 3rd pleat.

Advantageously, realize firm connector by welding.

Realize firm connector by two parts of weld metal element, form flat vertical wall with this and can make such hardware, for example brass electrode without additional materials.

Advantageously, at least one blade comprises at least one shutter.

Advantageously, hardware is an aluminum or aluminum alloy.Can reduce the manufacturing cost of hardware with aluminum or aluminum alloy.

The present invention also comprises the heating rod of being crossed by air communication, and this heating rod comprises at least one resistive element and at least two hardwares with above-mentioned feature.

Advantageously, be fixed on the resistive element by bonding whole surface one of hardware flat vertical wall.

Advantageously, by connector heating rod is electrically connected with power supply, described connector comprises a plurality of teeth on the part of vertical wall that can be fixed to described hardware.

Advantageously, heating rod is electrically connected with power supply, on the part by the bonding vertical wall that described connector is fixed to described hardware by connector.

Advantageously, connector is an aluminium.

Form the manufacturing cost that connector can further reduce heating rod with aluminium.

The present invention comprises also and is used for electric heater that airflow flowing in the air-conditioning system is heated that this electric heater comprises that at least one has the heating rod of above-mentioned feature.

Above-mentioned hardware obtains by following manufacture method, and this manufacture method comprises a succession of step:

A) make a band distortion, so that form blade,

B) push this band, so that second pleat is contacted with the 3rd pleat,

C) welding of belt, so that form vertical wall,

D) cutting metal sheet.

This manufacture method can be simplified the manufacturing of hardware 2.In fact, having needed size with the available hardware of this method uses in order to heating rod.In addition, as long as a production line just can be made this hardware, thereby reduced manufacturing cost.

Advantageously, welding uses induction welding to realize.

In first Implementation Modes of manufacture method, the distortion in the step a) is punched web.

According to second Implementation Modes of manufacture method, the distortion in the step a) is the roll extrusion band.

Advantageously, this method comprises a step a '), this step is the band after the roll extrusion (100) is flattened, so that form flat, described step a ') after step a) and step b) carried out in the past.

According to the modification of second Implementation Modes, this manufacture method comprises a step e), and the hardware that stretches in this step is so that it is smooth that vertical wall is flattened.

Description of drawings

By below reading according to principle with reference to accompanying drawing to only as an example the description of two Implementation Modes of hardware, will more be expressly understood the present invention, more clearly understand further feature of the present invention,

Wherein:

Fig. 1 is the schematic diagram of heating rod;

Fig. 2 is mounted in the enlarged diagram of the part of the hardware 2 in the heating rod 1;

Fig. 3 is the schematic diagram of connector 4;

Fig. 4 is the schematic diagram of an end that comprises the hardware of connector 4;

Fig. 5 and 5b are the schematic diagrames that is contained in the shutter on the blade body of hardware;

Fig. 6 is the schematic diagram of the manufacture method of hardware;

Fig. 7 is the part schematic diagram according to the manufacture method of first Implementation Modes;

Fig. 8 is the part schematic diagram according to the manufacture method of second Implementation Modes;

Fig. 9 and 9b are the part schematic diagrames according to the manufacture method of modification second Implementation Modes.

Embodiment

Fig. 1 shows heating rod 1.This heating rod 1 is the member of unshowned electric heater.Each heating rod 1 that constitutes electric heater all is independently, thereby according to modular mode a plurality of heating rods 1 is assembled.This heating rod 1 can heat the air-flow by described electric heater, and air communication is everlasting, and air-conditioning system is interior to flow.Hardware 2 is formation parts of heating rod 1, and air-flow is usually also by this hardware.

Heating rod 1 comprises two hardwares 2 and five resistive elements 3.Resistive element 3 is made of flat oilstone CTP.Each hardware 2 can be aluminum or aluminum alloy, for example aluminium-silicon alloys.

Hardware 2 comprises vertical wall 6a on a plurality of blades 5,, vertical wall 6b and two sidewall 6c once.Notion " on " and " descending " should understand, it depends on the layout shown in Fig. 1 and 2.Four walls (6a, 6b and 6c) all are flat, and being provided with of they can constitute a frame, and the longitudinal profile of frame is a rectangle.At this on the one hand, flat last vertical wall 6a is parallel to flat following vertical wall 6b, and these two

vertical wall

6a, 6b's is measure-alike.Equally, be parallel to each other between the sidewall 6c, measure-alike.Like this, hardware 2 is a rectangular parallelepiped.In addition, vertically wall and sidewall are solid, that is to say that the air-flow by electric heater can not pass described

vertical wall

6a, 6b and sidewall 6c.The end of hardware 2 is formed by the border area.Border area extends to the 20 blade as this wall part from sidewall 6c.

As shown in Figure 1, the hardware 2 of top is fixed on five resistive elements 3 flush of vertical wall of this time and resistive element 3 by its flat following vertical wall 6b.Especially, be fixed on the resistive element 3 by bonding flat following vertical wall 6b hardware 2.Used bonding agent 15 normally insulate, and electrically contacting on the surface of resistive element between the hardware 2 of top and the resistive element 3 carried out, and electric current is not propagated in the zone that contacts with bonding agent of following vertical wall 6b.In addition, hardware 2 on the whole surface of its flat vertical wall 6b by the bonding face that is fixed to resistive element 3 on.In addition, second hardware 2 that uses the same method the below is fixed on other face of resistive element 3, so that two hardwares 2 are in the both sides of resistive element 3.This second hardware 2 is vertically fixed on the wall 6a on it is flat.Like this, no matter which type of flat vertical wall can be used for hardware 2 is fixed on the resistive element 3, this is because hardware 2 is symmetrical with respect to the median plane P of hardware 2.

Heating rod 1 comprises two connectors 4.Each connector 4 is fixed on flat vertical wall at an end place of hardware 2.Specifically, each connector 4 is fixed to not with vertical wall that one or more resistive elements 3 contact on.With regard to the median plane P ' of heating rod 1, these two connectors 4 are in the same side of heating rod 1, and median plane P ' is identical with median plane P.These connectors 4 can be connected heating rod 1 with unshowned power supply.Therefore, electric current flows through the hardware 2 that comprises a connector 4.Thus, air-flow and electric current are simultaneously by hardware 2.

According to Fig. 2, hardware 2 comprises two flat

vertical wall

6a, 6b, two sidewall 6c, a plurality of

blades

5,5 ', 5 ", 5 " ', some are

flats

12,14 down, flat 13,15 on some, some lower-

left pleats

15,19, some bottom

right pleats

16,20, some upper left pleats 17,21, some upper right pleats 18,22, and some firm connectors 23.

Each pleat constitutes the junction surface between a blade and the flat.For example flat 13 is between two blades 5,5 ' on first, realizes going up crossing between flat 13 and two blades 5,5 ' by one first upper left pleat 17 and one second upper right pleat 18.The first upper left pleat 17 will be gone up flat 13 and be connected to blade 5, the second upper right pleats 18 and will go up flat 13 and be connected to blade 5 '.Like this, go up flat 13 and two blades 5, the 5 ' sub-assemblies that constitute shape that is generally triangular by one.Equally, flat 15 is in two blades 5 on second ", 5 " ' between, realize this second flat 15 and two blades 5 by one the 3rd upper left pleat 21 and one the 4th upper right pleat 22 ", 5 " ' between crossing.

Each

blade

5,5 ', 5 ", 5 " ' extend to another flat vertical wall from a flat vertical wall so that each blade is basically perpendicular to two flat vertical walls.

Form

vertical wall

6a, 6b with a succession of flat, described flat links to each other with firm connector 23 each other.In order to understand the structure of flat vertical wall better, the part of a flat last vertical wall 6a is described below.This part is corresponding to going up the part that connects between the flat 13 and 15 with firm connector 23 with two.

The firm connector 23 that last flat 13 is connected to flat 15 is between the second upper right pleat 18 and the 3rd upper left pleat 21.This firm connector 23 is that the welding by hardware 2 forms.This firm connector 23 exactly is the result of upper right pleat 18 and 21 fusings of upper left pleat by constituting with the material identical materials that constitutes hardware 2.Because the self structure of pleat is so the welding between these pleats allows.In fact, hardware 2 comes from band 100.Thus, constitute all parts of hardware 2, the band 100 that just flat

vertical wall

6a, 6b, sidewall 6c, blade 5 all come free aluminum or aluminum alloy to constitute.The hierarchy of this band 100 for constituting by aluminium interlayer, each side of described aluminium interlayer covers with aluminium is outer, and the outer field fusing point of this aluminium is lower than the fusing point of interlayer.Like this, when welding, the skin fusing of each pleat.

Last flat

13,15 is adjacent, and upper right pleat 18 and upper left pleat 21 connect together between these two flats, thereby forms two connectors of going up between the flat 13,15.This connector is firm, because this connector is because pleat 18 and 21 molten material mix the back solidifies and cause, and in case solidify, and this connector will clearly (d é finitivement) two adjacent

last flats

13 and 15 of connection.Owing on all are adjacent, all use this structure on the flat, so obtain flat last vertical wall 6a.This flat vertical wall 6a of Xing Chenging can allow electric current flow to the other end from an end of described flat vertical wall like this.Equally, flat following vertical wall 6b forms with method same as described above.

As shown in Figure 3, connector 4 comprises the tooth 7 on a plurality of flat vertical walls that described connector 4 can be fixed to described hardware 2.Connector 4 is made of the thin slice 8 of brass or aluminium, and it comprises first area 9 that has a plurality of teeth 7 and the second area 10 that electrically contacts with power supply.Described tooth 7 is provided with according to two rows 11, and this two row forms the longitudinal edge of the periphery of first area 9.With thin slice 8 bendings, so that form the structure that can be connected with power supply.In other words, with thin slice 8 bending, its second area 10 is in the plane vertical with first area 9.

In Fig. 4, just connector 4 can be fixed on the flat vertical wall by bending tooth 7.In case connector 4 is on flat vertical wall of hardware 2 one ends, a plurality of teeth 7 bendings that just will in a plane, protrude with respect to flat vertical wall, described plane and the plane parallel that contains flat vertical wall make these teeth around flat vertical wall.In case with tooth 7 bendings, then each tooth covers a flat that forms flat vertical wall separately.So just connector 4 is fixed on the hardware 2.

Connector 4 fixing on flat vertical wall also can realize with other any way, and be for example bonding, also can bonding modes with tooth 7 uses combine.

According to Fig. 5 and 5b, blade 5 comprises at least one shutter 13.Shutter 13 can be Any shape.For example in Fig. 5, shutter 13 can be the partial blade 5 that cuts into the U type, with its bending, thereby between blade 5 and shutter 13, obtain can from 0 to 90 ° of variation angle.Another embodiment of shutter 13 is shown among Fig. 5 b, and this embodiment has by the part of the blade 5 of roll extrusion and cutting, forms shutter 13 with this.

Air communication is crossed hardware 2.This air-flow laterally by hardware 2, that is to say that airflow direction is perpendicular to band plane shown in Figure 1.The structure of hardware 2 can guarantee a plurality of functions.In fact, hardware is guaranteed electrode function, electric conductor function and radiator function simultaneously, and the radiator function can heat the air-flow by it.

The electric current that provides from the end to end power distribution of the length of hardware 2 is provided electrode function.The kind electrode function is guaranteed by the flat vertical wall that is connected to power supply with connector 4.Therefore, electric current is not subjected to the influence of the loss of voltage between the free end of the end that is connected with power supply and hardware 2.Therefore electrode function is carried out by the flat and the arranged alternate of the connector 23 that forms flat vertical wall.

The electric conductor function is current spread to resistive element 3.This function is guaranteed by blade 5.Like this, the electric current that arrives through flat last vertical wall 6a flows through hardware 2 by blade 5, in order that arrive resistive element 3.

The radiator function is the air-flow heating by hardware 2.This function is guaranteed by blade 5 that equally also purpose is that resistive element 3 is carried out heat exchange by the heat that the CTP effect produces.Thus, blade 5 guarantees to have two effects, just this blade be radiator be again electric conductor.

The invention still further relates to the manufacture method of the structure that can access above-mentioned hardware 2.

As shown in Figure 6, the manufacture method of hardware 2 comprises following a succession of step:

A) make 100 distortion of a band, so that form blade,

B) push this band 100, so that second pleat 18 is contacted with the 3rd pleat 21,

C) welding of belt 100, so that form

vertical wall

6a, 6b,

D) cutting metal sheet.

Describe each step below in detail.At first, roll-shaped band 100 being introduced into an energy is sprayed onto oil in the device on the band 100.This oil can be protected the device that band 100 is out of shape in step a).

In step a), band 100 is introduced in the device that can make band distortion.This distortion is to form the blade 5 of hardware 2.According to selected Implementation Modes, can obtain blade 5 by punched web 100 or by roll extrusion band 100.

Under the situation of punching press, the formation of blade 5 causes the formation of flat, and promptly punched web 100, so that castellation as shown in Figure 7 occurs.

Under the situation of roll extrusion, carry out an additional step, it is smooth that this step comprises that the band 100 that makes the process roll extrusion flattens, so that form flat.During with this method, can carry out this smooth operation two different periods.

As shown in Figure 8, after the step a) and before step b) according to step a ') carry out smooth operation, this operation is to make the band 100 of roll extrusion to pass through between unshowned wheel, and these wheels act on those parts that band 100 need become flat.It is smooth that these wheels can make the circle that need become flat flatten.

Shown in Fig. 9 and 9b, according to step e) band 100 is flattened, this step is the final step of this method.To further describe this step in the following explanation.

In case form blade 5 by punching press or by roll extrusion, just with band 100 heating, so that the oil that will before spray evaporation.The step of the step of sprinkling oil and evaporation oil is the step that can select, on this meaning, say these steps can be not at the row of this method.These two steps just can be protected device used in the step a), increase their useful life, and this is because band 100 can be the form of aluminium and silicon alloy, and silicon is the cause of damage device.

Then, according to step b) the band 100 that has become shape is exerted pressure.This step b) is to make their aspectant contacts by pushing these two pleats that belong to different flats.Link same two blades 5 going up flat 13 by upper left pleat 17 and upper right pleat 18 like this, respectively and bottom right pleat 16 and the lower-left pleat 19 that contacts to each other just arranged respectively with 5 '.

Step subsequently is to spray fluid on band 100.This fluid can be at welding step c) time clean band 100.By clean band 100 can so that to the surface of band 100 do not have impurity, thereby weld effectively.

Step c) is to clean aluminium and welding of belt 100.Exactly, step c) is that two pleats that will belong to two different flats weld Face to face, thereby by forming connector 23 these two different flats is firmly connected.Thereby a succession of flat forms flat vertical wall 6a, 6b.With induction welding band 100 is welded.Exactly, band 100 is by a unshowned inductor that is used to produce magnetic field.This magnetic field produces induced current in band 100.Band 100 is owing to this electric current heats.Because the temperature that is ejected into the fluid on the band 100 is lower than the melting temperature of band 100, so the state variation of fluid makes the aluminium of band 100 obtain cleaning, but not fusing of band 100.Then, when the temperature of band 100 improved, aspectant pleat was welded to each other together, thereby firmly connected between the two.When this step finished, band 100 just comprised two

vertical wall

6a and 6b and a plurality of blade 5.

Step d) is to limit earlier band 100, according to needed size it is cut then.Utilize the size that the equipment that calculates band 100 length is cut to be needed, described band is walked in production line.For example, can use the wheel that acts on one of them flat vertical wall, this wheel is connected with a counter (compteur), the length of the band 100 of walking when counter is presented at step d).This measuring equipment is connected with a cutting equipment.When this step finished, the size of the hardware 2 that obtains was suitable for making it to bond on the resistive element 3, thereby formed heating rod 1.

Pressing step e) shown in Fig. 9 and the 9b is described below.When using rolling depression method as the deforming step of band 100, the zone that this band is used to become flat is a convex shape.Therefore the step e) hardware 2 that is to stretch is so that make flat

vertical wall

6a, 6b flatten smooth.This step e) realizes by stretcher 14.This stretcher 14 is arranged on two sidewall 6c places of hardware 2, this stretcher two the sidewall 6c that can stretch along the same line towards different directions.Utilize connector 23 firmly to connect a series of flat, stretched operation can make the elevated regions distortion, flattens until these zones.The pulling force that utilizes connector 23 opposing hardwares 2 to be subjected to can be realized this step.

Claims

1, a kind of hardware of being crossed by air communication (2), this hardware comprises vertical wall (6a) on, vertical once wall (6b) and two sidewalls (6c) and a plurality of blade (5), it is characterized in that, vertical wall (6a, 6b) at least one formed by a series of flat, and described flat utilizes firm connector (23) to link to each other to each other, (6a, 6b) thereby at least one is delivered to the other end with electric current from an end of described flat vertical wall to flat vertical wall.

2, hardware according to claim 1 (2), it is characterized in that, first flat (13) is in two blades (5,5 ') between, this flat (13) and this two blades (5,5 ') crossing between realized by first pleat (17) and second pleat (18), second flat (15) be in two blades (5 "; 5 " ') between, this second flat (15) and this two blades (5 ", 5 " ') between crossingly realize that by the 3rd pleat (21) and the 4th pleat (22) its feature also is, firm connector (23) between adjacent two flats (13,15) is between second pleat (18) and the 3rd pleat (21).

3, hardware according to claim 2 (2) is characterized in that, realizes firm connector (23) by welding.

According to any described hardware (2) among the claim 1-3, it is characterized in that 4, at least one blade (5) comprises at least one shutter (13).

5, according to any described hardware (2) among the claim 1-4, it is characterized in that this hardware is an aluminum or aluminum alloy.

6, a kind of heating rod of being crossed by air communication (1) is characterized in that, this heating rod comprises that at least one resistive element (3) and at least two are according to any described hardware (2) among the claim 1-5.

7, the heating rod of being crossed by air communication according to claim 6 (1) is characterized in that, (6a, whole surface 6b) is fixed on this resistive element (3) facing to resistive element (3) with one of hardware (2) flat vertical wall by bonding.

8, according to claim 6 or the 7 described heating rods of being crossed by air communication, this heating rod is electrically connected with power supply by connector (4), it is characterized in that described connector (4) comprises a plurality of teeth (7) on the part of flat vertical wall that this connector (4) can be fixed to described hardware (2).

9, according to claim 6 or the 7 described heating rods of being crossed by air communication (1), this heating rod is electrically connected with power supply by connector (4), it is characterized in that, on the part by the bonding flat vertical wall that described connector (4) is fixed to described hardware (2).

10, according to Claim 8 or the 9 described heating rods of being crossed by air communication (1), this heating rod is electrically connected with power supply by connector (4), it is characterized in that, this connector (4) is an aluminium.

11, a kind of electric heater that airflow flowing in the air-conditioning system is heated is characterized in that, this electric heater comprises that at least one is according to the described heating rod of claim 6-10 (1).

12, a kind of manufacture method of making according to any described hardware (2) among the claim 1-5, this method has following a series of step:

A) make a band (100) distortion, so that form blade (5),

B) push this band (100), so that second pleat (18) is contacted with the 3rd pleat (21),

C) welding of belt, so as to form vertical wall (6a, 6b),

D) cutting metal element (2).

13, the manufacture method of hardware according to claim 12 (2) is characterized in that, welding uses induction welding to realize.

According to the manufacture method of claim 12 or 13 described hardwares (2), it is characterized in that 14, the distortion in the step a) is punched web (100).

15, the manufacture method of hardware according to claim 13 (2) is characterized in that, the distortion in the step a) is roll extrusion band (100).

16, the manufacture method of hardware according to claim 15 (2), it is characterized in that this method comprises a step a '), this step is the band after the roll extrusion (100) is flattened, so that the formation flat, described step a ') after step a) and step b) carried out in the past.

17, the manufacture method of hardware according to claim 15 (2) is characterized in that, this manufacture method also comprises a step e), and the described hardware that stretches in this step is so that it is smooth that vertical wall is flattened.