WO2016087054A2

WO2016087054A2 - Heating system for a fluid-conducting conduit

Info

Publication number: WO2016087054A2
Application number: PCT/EP2015/025096
Authority: WO
Inventors: Janosch ACKERMANN; Thomas Chaloupka; Ludwig Puskas; Ewald STORZ; Christian Diekmann; Christian Schmid
Original assignee: Eugen Forschner Gmbh
Priority date: 2014-12-06
Filing date: 2015-12-05
Publication date: 2016-06-09
Also published as: DE202014105908U1; WO2016087672A1; WO2016087054A3; DE202015009428U1

Abstract

The invention relates to a heating system comprising at least one fluid-conducting tube (30) and at least one connecting element (20; 120), which can be heated by means of at least one heating conductor (40; 44; 340), for connecting the at least one tube (30) to another tube (30) and/or to a plug connector (310) and/or to a connector element (10). In order to improve the transfer of heat from the heating conductor (40; 44; 340) to the fluid, according to the invention the at least one connecting element (20; 120) is provided with or connected to at least one heat-conducting element (20; 26; 120; 123; 310; 345) which permits the transfer of the heat, supplied by the heating conductors (40; 44; 340), into neighbouring components.

Description

Heating system for a fluid-carrying line

The invention relates to a heating system for a fluid-carrying line, comprising a fluid-carrying hose and at least one connecting element and / or a plug and / or a connector, as used for connecting plugs and hose couplings, according to the preamble of claim 1.

Such a heating system is known for example from DE 10 2010 032 189 A1. In this, a continuous heating element extends both along a fluid-carrying tube and along at least one connected thereto connector. The preparation of such a heating system is very expensive due to a high proportion of manual winding work.

The object of the invention is to provide a heating system which is easy to produce and has a high efficiency.

This object is achieved by a heating system with the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

The heating system according to the invention preferably has at least one heat-conducting element which enables the heat supplied by the heating conductors to be forwarded to adjacent components such as connecting elements, plugs, connectors or hose ends connected to them. By the Invention, the heat input into the heating system can be limited to a single or to a few points or areas of the entire fluid line system, which are designed as hotspots and the there fed by electrical heating conductors heat over adjacent areas and even from a component connected to it Forward components and, in spite of only occasional infeed, ensure a uniform heating of the fluid. The effort for the attachment of the heating element is thereby reduced to a minimum. According to a first advantageous embodiment of the invention, it is provided that the heat-conducting element itself is formed by the connecting element and / or the plug and / or the connector by its existing at least in some areas high thermal conductivity. The increased thermal conductivity can be achieved by a fundamental selection of a material with a higher thermal conductivity for these components. But it is also a partial use of thermally conductive materials or a doping with thermally conductive particles possible, such as an embedding of particles, fabrics or knitted fabrics of a highly thermally conductive material in a carrier matrix of a less thermally conductive material.

According to a supplement or alternative thereto, it is advantageously provided that the connecting element and / or the plug and / or the connector at least partially consist of a thermally conductive plastic. Alternatively or additionally, it is provided that the connecting element and / or the plug and / or the connector consist at least partially of a thermally conductive ceramic material.

According to a further alternative or as a supplement to the above-mentioned thermally conductive elements is advantageously provided that the connecting element and / or the plug and / or the connector is provided with a heat-conductive sleeve made of metal as another heat-conducting element. In one embodiment of the heat-conducting element as a sleeve, this is arranged according to a first advantageous alternative on a lateral surface of the connecting element and / or the plug and / or the connector. In this case, this lateral surface is particularly advantageously chosen so that, after being joined with an adjacent component, it also bears against a wall of this component and thus forms a thermal bridge between the two assembled components.

According to a further alternative or in addition to the solutions described above, it is provided that the sleeve is arranged integrated as an insert part in a wall of the connecting element and / or the plug and / or the connector. Thus, for example, a thin-walled metal part may be surrounded as a heat-conducting sleeve by a plastic applied, for example, by encapsulation as a carrier material.

The provided with a sleeve portions of the connecting element and / or the plug and / or the connector are advantageously at least partially provided with at least one winding of a heating element. According to a further advantageous embodiment, the sleeves can also be configured as a heat conductor itself.

The sleeves can be advantageously provided with at least one rib for guiding a heat conductor, in particular when mounted on a lateral surface. Particularly advantageous is an arrangement of a plurality of uniformly spaced ribs, in the interstices find the heating wires a defined recording.

An inventive connecting element can for example also be advantageously arranged between at least two heatable hoses. It thus serves for flexible packaging of a heating system, since any type of hose and hose lengths can be connected by means of a heatable connecting element to a heating system. By winding the connecting element with at least one heating conductor, the connection serve as an intermediate heating between at least two connected to this hose ends. At low outdoor temperatures, by simultaneously heating at least one heat conductor in one of the hoses and at least one of the heating conductors on the connecting element, an increased energy input into the fluid can be achieved. At slightly higher ambient temperatures, which require less heating of the fluid, a sequential shutdown of individual heat conductors to the hoses and / or the connecting element is possible, whereby the energy consumption for the heating of the fluid is minimized and the overall efficiency is increased accordingly.

According to a further advantageous embodiment or an alternative of the invention it is provided that at least one control o- the control element for changing the heating power of at least one heat conductor is arranged on the heatable connecting element and or on the heatable connector or on the heatable connector. By integrating a control or regulating element for changing the heating power directly on these components signal lines to remove the hoses and fasteners arranged controls or control devices omitted. The assembly effort is minimized because the components so equipped quasi have a "self-intelligence" to provide a matched to the particular requirements heating performance.

According to a further advantageous embodiment or an alternative of the invention, a connecting element of the heating system is connected to at least one sealing element which seals a transition region between the connecting element and a connector or a plug. As a result, heat losses are effectively prevented at the transition between adjacent components.

The features represented in the patent claims can individually define the heating system according to the invention individually or in any combination with one another. Embodiments of the Behei system according to the invention will be explained in more detail with reference to the drawings. It shows:

Fig. 1 is an exploded perspective view of a connector and a connecting member to be connected thereto with a heat-conducting

sleeve;

FIG. 2 shows a longitudinal section through the components according to FIG. 1; FIG. 3 shows the connector and the connecting element according to Figures 1 and 2 in the assembled state with heating elements attached to the connecting element and a tube end received by the connecting element; Fig. 4 is an illustration of an alternative embodiment of a first half of a longitudinally split connector with a finned thermally conductive sleeve;

5 shows a plug made of a highly heat-conductive material. and

FIG. 6 shows the plug according to FIG. 5 with a thermally conductive sleeve embedded therein and a winding of a heating conductor arranged thereon.

A connector 10 shown in FIGS. 1 to 3 has a through bore 14 in a housing 12. The hole 14 serves to receive a plug 310 shown in FIGS. 5 and 6. The plug 310 is inserted from the end face 10A of the housing 12 into the bore 14 and locked in the housing 12 by means of a coupling element 19 designed as an angled spring. During insertion of the plug 310, the collar 313 arranged on the plug moves the coupling element 19 downwards into a release position. As soon as the collar 313 has passed the enlarged upper part of the keyhole-like through bore on the coupling element 19, this is returned to its position by means of the integrated spring elements arranged in the upper part Clutch position pressed in which it locks the plug 310 in the housing 12 of the connector 10. To cancel the lock, the coupling element 19 is pressed against the spring force of the integrated in the upper part of the coupling element 19 spring elements down, thereby releasing the plug 310 again.

As best seen in Figure 2, with respect to the longitudinal axis 1 6 of the connector 10 on the right side coaxial with the bore 14, a cylindrical receptacle 18 is formed. The receptacle 18 passes at its inner part in an annular channel 18 A, which is formed between a bore 14 surrounding the nozzle 15 and an outer wall 17 of the housing 12.

The receptacle 18 serves to receive a connecting element designated as a whole by 120. The connecting element 120 has on a

Connector 10 facing side, a first cylindrical surface 122 and on a side facing away from the connector 10 side, a second cylindrical surface 127 on. The lateral surfaces 122 and 127 are separated by a collar 126. As can be seen in particular in FIG. 1, this collar 126 has a plurality of projections 126 A which are arranged for axially defined and non-rotatable positioning in a connecting element 120 which is not shown

Housing serve. The collar 126 also has recesses 126B, which serve for the passage of leads 42 for the heating conductors 40 and 44 shown in Figure 3. The connecting element 120 has at its end facing the connector 10 120 A inside a cylindrical receptacle 121 which serves to receive a four sealing surfaces equipped with sealing element 50 and the end of which also dips in the assembled state in the annular channel 18 A on the connector 10 and there As can be seen in FIG. 3, a welding collar 120B is formed for the material-locking connection of the connector 10 to the connecting element 120. The weld collar 120B is, for example, after the joining of the connecting element 120 with the connector 10 by ultrasonic welding welded or fused from the front side 10A cohesively with the annular channel 18 A.

After the joining of the connecting element 120 with the connector 10, the sealing element 50 lies between the front side of the connecting piece 15 and a step-shaped shoulder 121 formed in the receptacle 121 of the connecting element 120. The sealing element 50 ensures over the hitherto used in this area O-rings a particularly low-friction insertion of the plug 310 and yet ensures a high sealing effect.

Before joining, a thermally conductive sleeve 123 is pushed onto the lateral surface 122 of the connecting element 120. The inner wall of the heat-conducting sleeve 123 is preferably seated in a tight press fit on the lateral surface 122. Subsequently, a winding of a heating conductor 40 is applied to the right-hand part of the heat-conducting sleeve 123. The heating conductor 40 is energized by means of a feed line 42, depending on the heating requirement of the guided through the connector 10 and the connecting element 120 fluid according to more or less strong. Since the heat-conductive sleeve 123 extends over a large part of the lateral surface 122 of the connecting element 120 and after the joining of the connecting element 120 with the connector 10 also dives to a substantial extent in this, the heat introduced via the heat conductor 40 from the heat-conducting sleeve 123th over the entire length of the lateral surface 122 forwarded into the connector 10 inside. The cohesive connection through the weld collar 120B forms in addition to the heat-conducting sleeve 123, a further thermal bridge between the connecting element 120 and the connector 10. As soon as the front part of a plug 310 is inserted into the bore 14 of the connector 10, this is still from the heating element 40 indirectly heated.

On the right side of the connecting element 120, a cylindrical receptacle 128 is formed which, as shown in FIG. of a heated tube 30 is used. The connecting element 120 has in its interior a nozzle-shaped projection 129 A, in which a passage 129 B is formed for the fluid delivered in the system. The projection 129A forms with the wall of the Verbindungsele- 120 having the lateral surface 127 a ring channel 129. In this annular channel 129, the end of the heatable tube 30 shown only simplified inserted and surrounded there in the annular channel 129 from all sides by means of an adhesive 129C and after its curing fixed. The amount of the adhesive 129C is so dimensioned that the adhesive 129C does not rise beyond the projection 129A after immersing the end of the tube 30 in the annular channel 129. The boundary of the adhesive 129C is indicated in Figure 3 by a dashed line.

In the right edge region of the connecting element 120, a collar 124, which has an inner collar ring 124A, an outer collar ring 124B and an annular groove 125 arranged between the collar rings 124A and 124B, is formed as an outer boundary of the lateral surface 127. The collar 124 with the collar rings 124A, 124B has at least at one point a recess, which serves to carry out a supply line for the heating conductor 44. The groove 125 serves in this case with an inwardly narrowing groove base for fixing the heating conductor 44 or the supply line to the connecting element 120.

A further exemplary embodiment of the invention shown in FIG. 4 shows a first part 20A of a connecting element 20 divided in the circumferential direction. The connecting element 20 consists of the first part 20A and a similarly formed part 20B, not shown, which together join together a largely rotationally symmetrical one Component with a central coaxial with the longitudinal axis 21 arranged passage opening 27 result. At both ends, a thickened collar 22 and 24, respectively, is formed on the connecting element 20. The collar 22 and the collar 24 delimit a central region 23 which is reduced in diameter relative to the collars 22, 24. In this central region 23, a heat-conducting sleeve 26 is arranged with at least a part of the circumference, uniformly spaced apart in the longitudinal direction. th rib-shaped guide elements 26 A, whose interstices are formed by corresponding recesses 25.

For connection of the two parts 20A and 20B of the connecting element 20, these are provided with at least two form-fitting intermeshing pins 28 and mating opposite holes 29. The pins 28 and the holes 29 are designed so that they connect the two parts 20 A and 20 B of the connecting element 20 positively to one another. You can also be provided with not shown locking elements. In addition, a bond between the two parts 20 A and 20 B may be provided.

The intermediate spaces 25 between the ribs 26 serve to accommodate a helically wound around the central region 23 of the connecting element 20 heating conductor, which is formed analogously to the heating conductor 44 on the connecting element 120 in Figure 3. The heating conductor 44 is connected by means of two leads 42 via a not shown control or Regeleinrichung example, to the electrical system of a vehicle and is used to heat a liquid urea-water mixture, which is also known under the name "AdBlue" and to reduce As shown in Figure 4, the collar 24 may have a recess 24A through which the leads 42 are routed to the outside, and the leads 42 may also be connected to another via a plug (not shown) Be connected heating, which serves to heat the heated tube 30.

The connecting element 20 is coupled on one side with a connector 10 and on the other side with a heatable hose 30. The hose 30 with its inner passage 36, the connecting element 20 or 120 with its passage opening 27 or 129 B and the through hole 14 in

Connector 10 form a contiguous fluid conduit system. The tube 30 is aligned with its longitudinal axis with the longitudinal axis 21 of the connecting element 20 and with the longitudinal axis 1 6 of the connector 10. The passage 36 of the Hose 30 is bounded by a wall. Around the wall around a heating conductor, not shown, is arranged. The heating conductor is surrounded by an insulating sheath, also not shown in detail, which may be composed of several layers. The outer layer is preferably formed by a corrugated tube or corrugated tube. The connecting element 20 serves with its heating conductor for additional heating of the fluid carried in the interior in the coupling region between the hose 30 and the connector 10.

Such connecting elements 20 may preferably also be arranged between two hoses 30 as heating areas, which in turn are not heated. As a result, different heating powers can be introduced into the fluid, for example, depending on the outside temperature. For example, the heating conductors in the hoses 30 can remain de-energized if the heating power introduced via a connecting element 20 arranged therebetween is sufficient for the fluid line system alone. The heating conductors in the hoses 30 are then energized only at lower temperatures. Conversely, the heating conductors in the hoses 30 can be energized at not so low temperatures, while the heating conductors remain energized to the connecting element 20. In Figures 5 and 6, a connector 310 is shown with a housing 312 which is formed on the left side of the figure as an SAE plug and on the right side has a receptacle 318 for a tube 30, which is analogous to the receptacle 128 on the connecting element 120 is formed with a central nozzle and a surrounding annular space. Coaxially to a longitudinal axis 31 6, a through hole 314 is provided, which serves to direct a fluid. On the outer circumference, a collar 313 and another collar with a groove-shaped receptacle 315 are formed for the connection to the connector 10. In the right part, a winding of a heating conductor 340 is provided on the outer circumference in the region of a lateral surface 320, by means of which heating energy is introduced into the plug 310 in the region of the receptacle 318. The peculiarity of the plug or connector 310 shown in FIG. 5 is that it is made of a highly heat-conductive plastic or a highly heat-conductive ceramic material. This material allows that through the heating conductors 340 (see Fig. 6) introduced in the right-hand part heat energy propagates further in the entire connector 310 to the left and thus the contact point to an adjacent component, in particular the connector 10 and the tube 30, is sufficiently heated with.

The connector 310 shown in Figure 6 has over the embodiment shown in Figure 5 in the plastic material or ceramic material of

Connector 310 has an embedded over almost the entire length sleeve 345 as an insert, which consists of a very good heat-conducting material, in particular a heat-conducting metal, such as copper. The heat energy introduced into the connector 310 via the heating conductors 340 is forwarded, in particular, by means of the sleeve 345 into the left-hand part of the connector 310. The plastic material or ceramic material, which surrounds the sleeve 345, may also be a good heat-conducting material, so that the positive heat conduction properties of the plastic material and the sleeve 345 complement each other.

LIST OF REFERENCE NUMBERS

Connector 120A end (from 120) A face 120B weld collar

Housing 121 recording

Bore 121 A paragraph

Nozzle 122 shank

Longitudinal axis 123 sleeve

Recording 124 fret

A ring channel 124A, B collar

Coupling element (spring) 124C recess

Connecting element 125 groove

A part (of 20) 126 Bund

Longitudinal axis 126A projection

Bund 126B recess

(middle) area (from 20) 127 lateral surface

Fret 128 recording

A recess (in 24) 129 ring channel

Recess 129A projection

Guide element 129B passage

A rib 129C adhesive

Passage opening 310 plug (connector)

Pin 312 housing

Bore 313 collar

Hose 314 bore

Passage 315 recording

Heating conductor 31 6 longitudinal axis

Supply line 318 recording (for 30)

Heating conductor 320 lateral surface

Sealing element 340 heating conductor

0 connecting element 345 sleeve (insert)

Claims

claims

1 . Heating system for a fluid-carrying line with at least one fluid-carrying hose (30) and with at least one by means of at least one heat conductor (40; 44; 340) heated connecting element (20; 120) for connecting the at least one hose (30) with another hose ( 30) and / or with a plug (310) and / or with a connector (10), characterized in that the at least one connecting element (20; 120) is provided with at least one heat-conducting element (20; 26; 120; 123; 310 345) is provided or connected, which allows a forwarding of the heat conductors (40; 44; 340) fed heat into adjacent components.

Heating system according to claim 1, characterized in that the

Heat-conducting element (20; 26; 120; 123; 310; 345) is formed by the connecting element (20; 120) and / or the plug (310) and / or the connector (10) by its existing at least in some areas high thermal conductivity itself , 3. heating system according to claim 1 or 2, characterized in that the connecting element (20; 120) and / or the plug (310) and / or the connector (10) at least partially consists of a thermally conductive plastic. 4. heating system according to one of the preceding claims, characterized in that the connecting element (20; 120) and / or the plug (310) and / or the connector (10) at least partially made of a thermally conductive ceramic material. 5. heating system according to one of the preceding claims, characterized in that the connecting element (20; 120) and / or the Plug (310) and / or the connector (10) is provided with a heat-conducting sleeve (26; 123; 345) made of metal.

Heating system according to claim 5, characterized in that the sleeve (26; 123) is arranged on a lateral surface (122) of the connecting element (20; 120) and / or the plug (310) and / or the connector (10).

Heating system according to claim 5, characterized in that the sleeve (345) is arranged as an insert part in a wall of the connecting element (20; 120) and / or the plug (310) and / or the connector (10) integrated.

Heating system according to one of Claims 5 to 7, characterized in that the regions (122; 127; 320) provided with a sleeve (26; 123; 345) of the connecting element (20; 120) and / or of the plug (310) and / or or of the connector (10) are at least partially provided with at least one winding of a heating conductor (40; 44; 340).

Heating system according to one of claims 5, 6 or 8, characterized in that the sleeve (26) is provided with at least one rib (26A) for guiding a heating conductor (40; 44; 340).

Heating system according to one of the preceding claims, characterized in that heat is transferred from a component (120) to an adjacent component (10) by means of a connecting material bridge (120B; 123).