DE102015001880A1 - Method and device for producing a plastic mat with reinforcement on the capillary tube - Google Patents

Abstract

The invention relates to a method and a device for the production of heating and / or cooling elements, consisting of a plastic mat, which consist of two manifolds and at least two capillary tubes, where are cohesively in connection with the collecting tubes with the transverse thereto extending capillary tubes by welding and be traversed by a heating and cooling medium. In this case, an additional element with the capillary tube is arranged at the axial end of the capillary tube on its outer diameter, and arranged between the manifold and capillary tube an intermediate element and in the manufacture of a die and / or a clamping device is used. According to the invention, it is important that in the manufacturing process at the collecting tube (2) a region (10) around the radial flow bore (9) to the capillary tube (1) is heated to weldable temperatures and that at the axial end (6) of the capillary tube (1) on its outer diameter an additional element (3) with the capillary tube (1) is arranged plan ending and that by heating the diameter of the capillary tube (1) and the additional element (3) on a transition region (4) are extended and by heating effect on the inner diameter of the capillary tube (1) and also at the outer diameter of the capillary tube (1) and at the inner diameter of the additional element (3) from the axial end (6) forth in the transition region (4) are produced weldable temperatures and that upon reaching the weldable temperature by means of a die (5 ), the capillary tube (1) together with the additional element (3) to the collecting tube (2) are pressed by welding.

Description

The invention relates to a method for the production of heating and / or cooling elements, consisting of a plastic mat consisting of two manifolds and at least two capillary tubes, where in the headers with the transverse thereto extending capillary tubes by welding cohesively in connection and of a Heating and cooling medium to be flowed through.

The invention further relates to a device for producing a heating and / or cooling element, consisting of a plastic mat, which is formed from two manifolds and at least two capillary tubes, where in the manifolds with the transverse thereto extending capillary tubes by welding materially connected and of a heating and cooling medium are flowed through and at the axial end of the capillary tube on its outer diameter an additional element with the capillary tube is arranged, or that between the manifold and capillary tube an intermediate element is arranged and in the manufacture of a die and / or a clamping device are used.

Heating and / or cooling element consisting of a plastic mat, which are formed by two manifolds with transversely extending capillary tubes. In operation, these are flowed through by a heating or cooling liquid and serve the air conditioning of interiors of buildings, eg. B. Office space. The plastic mats are used in the ceiling, in the wall and in the floor and air-condition the rooms primarily by their radiation.

In the DE 10 2006 061 995 A1 A method and apparatus for making a plastic capillary tube is presented. In this document it is shown how by means of a device and a precisely coordinated movement of the welding of the Kunststoffkapillarrohres must be performed with the manifold to produce a desired shape of the capillary tube at the weld. The desired shape is that the capillary tube has no notch on its outer diameter in the weld area but has a radius or a curved shape. In order to achieve the desired result, the temperature at the manifold is influenced by heat sinks, and a precisely coordinated movement sequence between the die and the capillary tube must be realized. Tolerances from the manifold and from the capillary affect the process negatively and lead to the reduction of the load capacity of the weld. At the same time machine-technically high expenditure is necessary to carry out the procedure.

A known method for producing a capillary tube mat is for example in the DE 197 25 326 C2 described. In the process, the capillary tubes are heated so that the inner diameters expand at the end of the capillary tubes. Due to the extended inner diameter, an unwanted reduction of the cable cross-section during welding is to be prevented. The procedure of DE 197 25 326 C2 has the disadvantage that it can come through mechanical stresses, for example, during installation of the capillary tube mats, to damage the pipe connections between header and capillary tube. Such damage can lead to leaks and increased installation costs.

In view of these disadvantages, the object of the present invention is to improve the mechanical strength of the capillary tube mats in the welding area of the capillary tubes with the collecting tube.

The object is achieved for the above-mentioned method, that in the manufacturing process at the manifold an area around the radial flow bore to the capillary tube is heated to weldable temperatures and that at the axial end of the capillary tube on its outer diameter an additional element is arranged plan ending with the capillary tube and that by heating the diameter of the capillary tube and the additional element are extended to a transition region and by heating effect on the inner diameter of the capillary tube and also on the outer diameter of the capillary tube and the inner diameter of the additional element from the axial end to the transition region weldable temperatures are generated and that with reaching the weldable temperature by means of a die, the capillary tube are pressed together with the additional element to the manifold welding.

Furthermore, there is a procedural solution in that the additional element on the outer diameter of the capillary tube from the axial end of the capillary tube can be arranged back to ¾ length of the transition region and that after reaching the weldable temperature in all participating elements, regardless of the position of the additional element within the Transition area, the capillary tube are pressed together with the additional element by means of a die to the manifold.

Next, the inventive solution is that the additional element has a bead-like shape and by heating effect, the additional element assumes a deformable consistency, wherein at least its surface is a weldable Having temperature and at the same time has extended by heating effect of the diameter and a transition region of the capillary and that by means of a die, the additional element and the capillary tube is pressed onto the manifold so that the additional element of the diameter extension of the capillary adapts and at the same time combines with it welding.

An advantage of the invention is that the additional element is tubular and may have different outer diameters and / or on the inner diameter on the axial end of the capillary tube and the additional element side facing away has a radius-shaped transition to its plan side and that the die may have different inner diameter.

An advantageous solution is achieved by a capillary tube section is used and in the manufacturing process at the manifold an area around the radial flow bore to Kapillarrohrteilstück is heated to weldable temperatures and that at the axial end of the Kapillarrohrteilstückes on its outer diameter an additional element with the Kapillarrohrteilstück plan ending or is positioned back to the ½ length of the transition region back on the Kapillarrohrteilstück and by acting on the additional element clamping device, which has the shape of the die on one side of the inner diameter, can be moved axially towards the manifold and that by heating the diameter of the Kapillarrohrteilstückes and of the additional element to be extended to a transition region and by heating effect on the inner diameter of the Kapillarrohrteilstückes and also on the outer diameter of the Kapillarrohrteilstückes and the Innendurchme Sser of the additional element from the axial end until the transition region weldable temperatures are generated and that when reaching the weldable temperature by means of the clamping device, the additional element together with the Kapillarrohrteilstück be pressed to the manifold in the axial direction of the flow hole welding. It is also advantageous that a capillary tube is arranged liquid-tight in the inner diameter and / or on the flat surface of the additional element.

Another advantage in the context of the invention is that an intermediate element between the manifold and capillary is cohesively arranged, wherein the intermediate element is arranged on one side with its outer diameter cohesively in the radial flow bore of the manifold and / or has a flange-like transition and so with the Collecting tube is materially in communication and the intermediate element on the other hand with the capillary tube through a sleeve-shaped transition or through a transition with the same outside diameter is in communication.

Advantageously, it is achieved that the intermediate element is reinforced in the transition region and has a radius in the flange-like transition on its outer diameter, or that an additional element is arranged on the intermediate piece in the transition region. Further, the intermediate element may be formed at an angle.

In the following, the invention will be explained by way of example with reference to the accompanying drawings. Show it:

1 a schematic representation of an exemplary embodiment of a plastic mat according to the invention 12

2 an embodiment of the welded joint of manifold 2 and capillary tube 1 the heating and / or cooling element according to the invention schematically in a partial section;

3 an embodiment of the welded joint of manifold 2 and capillary tube section 13 the heating and / or cooling element according to the invention together with a device for its production schematically in a partial section;

4 an embodiment of the heating and / or cooling element according to the invention with the use of an intermediate element 7 schematically in a partial section.

In 1 is the general structure of a plastic mat according to the invention 12 shown. The plastic mat 12 includes two manifolds 2 passing through at least two parallel capillary tubes 1 are connected. The headers 2 each have an end cap at one axial end 18 on and at the other end they are connected to a heating and cooling fluid circuit. During operation, the working fluid flows into one of the manifolds 2 into and through the capillary tubes 1 to the second manifold 2 , From there it flows back to the fluid circuit. The plastic mat 12 is for example installed in an interior in the ceiling. By means of the flowing heating and cooling liquid, the interior is appropriately tempered.

The headers 2 and the capillary tubes 1 consist of a weldable plastic. Every capillary tube 1 is at its axial ends 6 with the headers 2 welded fluid-tight. Such connections between capillary tube 1 and manifold 2 will be exemplified with reference to FIGS 2 to 4 demonstrated.

2 shows an exemplary embodiment of the weld connection of manifold 2 and capillary tube 1 a heating and / or cooling element according to the invention schematically in a partial section. The manifold 2 has a radial flow bore 9 , During the manufacturing process is on the outer diameter of the manifold 2 in the area 10 generated by heat a weldable temperature. This can be done by means of a heater by direct contact or by radiation. On the outer diameter of the capillary 1 is an additional element to improve the mechanical load 3 arranged. This can plan just with the capillary tube 1 or something from the plane surface of the capillary tube 1 backward, within the transitional area 4 to be positioned. By means of a heater, the additional element 3 on its outer diameter and the capillary tube 1 as well as the additional element 3 at the same time heated on its plane surface. The heating leads to flange-like enlargement of the outer diameter of the capillary tube 1 and the additional element 3 , By this change in shape, the inner diameter of the capillary tube 1 achieved by the radiation and it comes to weldable temperatures at the inner diameter of the capillary tube 1 in the area 4 , on the plane surfaces of capillary 1 and additional element 3 , on the inner and outer diameter of the additional element 3 and at the outer diameter of the capillary tube 1 , After reaching the weldable temperatures on all elements involved, the capillary tube 1 and the additional element 3 by means of a die 5 to the manifold 2 pressed. The matrix 5 can movements in the axial direction of the flow bore 9 To run. This creates a fluid-tight weld between manifold 2 and capillary tube 1 , At the same time, the additional element 3 with areas of the capillary tube 1 welded. capillary 1 and additional element 3 take in this process the touching contour of the matrix 5 one that is radiused. By means of the contour and the reinforcement of the capillary tube 1 through the additional element 3 a mechanically strong design is achieved. Improving on mechanical strength is additional, if the additional element 3 on its opposite side of the weld a radius on its inner diameter 11 has. The additional element 3 is meaningful way tubular. The outer contour may have different outer diameters. Thus, a larger diameter at the weld strengthens the mechanical strength and the small diameter in the opposite direction gives elastic in bending stresses of the capillary tube 1 to. For bending stresses of the capillary tube 1 is still the already mentioned radius 11 from the inner diameter to the plan side on the additional element 3 opposite of the manifold 2 advantageous.

Not shown graphically is a solution in which the additional element 3 has a bead-like shape and by heating effect, the additional element 3 gets a deformable consistency. This indicates the surface of the additional element 3 a weldable temperature on and at the same time has by heating the diameter and a transition area 4 of the axial end 6 of the capillary tube 1 extended. By means of a die 5 becomes the additional element 3 and the capillary tube 1 on the area having a weldable temperature 10 of the manifold 2 so pressed that the additional element 3 the diameter enlargement of the capillary 1 Adjusts and at the same time with him and the area 10 welded together.

3 shows an embodiment of the welded joint of manifold 2 and capillary tube section 13 of the heating and / or cooling element according to the invention together with a device for its production schematically in a partial section.

In this embodiment, an additional element comes 3 used, which has a greater longitudinal extent relative to the capillary tube section 13 having. In the manufacture of the heating and / or cooling element is the capillary tube section 13 in the additional element 3 arranged so that the additional element 3 plan just with the capillary tube section 13 or something from the plane surface of the capillary tube section 13 backward, within the transitional area 4 , is positioned. In this position, both elements by a clamping device 14 fixed. The position of the clamping device 14 is from the axial end of the capillary tube section 16 at least twice the value of the transition range 4 away. By means of a heater is now the heating of Kapillarrohrteilstück done 13 and additional element 3 until reaching the weldable temperatures. This process is explained in the notes to 2 described. The outer diameter of Kapillarrohrteilstück 13 and additional element 3 widens flange-like. After reaching the weldable temperature capillary tube section 13 and additional element 3 by means of the clamping device 14 radially to the touch of the weldable temperature possessing area 10 of the manifold 2 emotional. Thereafter, the clamping of the clamping device 14 easily solved and the clamping device 14 performs a further radial movement in the direction of the manifold 2 out. At the end of the movement is a pressure on additional element 3 and capillary tube section 13 in the direction of the area 10 from the manifold 2 executed. This leads to the fluid-tight welding of Kapillarrohrteilstück 13 , Collecting pipe 2 and additional element 3 , The transition area 4 is determined by the radius-like plane surface of the clamping device 14 shaped. Due to the radius shape and the use of the additional element 3 creates a high mechanical stress on the capillary tube section 13 , At the additional element 3 can contribute to the formation of the plastic mat 12 the capillary tube 1 plan or be arranged fluid-tight in the inner diameter.

4 shows an embodiment of the heating and / or cooling element according to the invention with the use of an intermediate element 7 schematically in a partial section. The intermediate element 7 is executed as a molded part. To improve the mechanical load capacity, it is in the welding area with the manifold 2 reinforced execution. On its opposite side it has for connection to the capillary tube 1 a sleeve-shaped transition 8th , The 4 shows that the intermediate element 7 flange with the manifold 2 cohesively connected. By means of heating effect is the area 10 of the manifold 2 and the transition area 4 from the intermediate element 7 heated to a weldable temperature. By a die, not shown, manifold 2 and intermediate element 7 merged and welded fluid-tight. It can also be on the intermediate element 7 an additional element 3 be arranged. The welding with the manifold 2 then happens as with the explanations to 2 described. For forming the plastic mat 12 can the capillary tube 1 either in the sleeve-shaped transition 8th or plan at the sleeve-shaped transition 8th be arranged cohesively.

The heating and / or cooling element is often arranged for air conditioning on flat surfaces. In order to achieve the highest possible energy transfer a maximum contact of capillary tube 1 and the flat surface sought. This is achieved in which the intermediate piece 7 is performed at an angle and by this change in direction the capillary tube 1 in the immediate vicinity of the manifold 2 comes into contact with the flat surface.

LIST OF REFERENCE NUMBERS

1

capillary

2

manifold

3

additional element

4

Transition area

5

die

6

axial end of the capillary tube 1

7

intermediate element

8th

sleeve-shaped transition

9

radial flow bore

10

Area

11

radiused transition

12

Plastic mat

13

Kapillarrohrteilstück

14

clamper

15

radius

16

axial end of the capillary tube section 13

17

axial end of the intermediate element 7

18

endcap

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006061995 A1 [0004]
• DE 19725326 C2 [0005, 0005]

Claims (10)

Method for producing heating and / or cooling elements, consisting of a plastic mat ( 12 ) consisting of two headers ( 2 ) and at least two capillary tubes ( 1 ), whereby the headers ( 2 ) with the transverse thereto capillary tubes ( 1 ) are cohesively connected by welding and are traversed by a heating and cooling medium, characterized in that in the manufacturing process at the manifold ( 2 ) an area ( 10 ) around the radial flow bore ( 9 ) to the capillary tube ( 1 ) is heated to weldable temperatures and that at the axial end ( 6 ) of the capillary tube ( 1 ) on its outer diameter an additional element ( 3 ) with the capillary tube ( 1 ) is arranged plan ending and that by heating effect of the diameter of the capillary tube ( 1 ) and the additional element ( 3 ) on a transitional area ( 4 ) and by heating effect on the inner diameter of the capillary tube ( 1 ) and also on the outer diameter of the capillary tube ( 1 ) and at the inner diameter of the additional element ( 3 ) from the axial end ( 6 ) down to the transitional area ( 4 ) weldable temperatures are generated and that upon reaching the weldable temperature by means of a die ( 5 ) the capillary tube ( 1 ) together with the additional element ( 3 ) to the manifold ( 2 ) are pressed together. Method according to claim 1, characterized in that the additional element ( 3 ) on the outer diameter of the capillary tube ( 1 ) from the axial end ( 6 ) of the capillary tube ( 1 ) up to ½ length of the transition region ( 4 ) can be arranged back and that after reaching the weldable temperature for all elements involved, regardless of the position of the additional element ( 3 ) within the transitional area ( 4 ), the capillary tube ( 1 ) together with the additional element ( 3 ) by means of a die to the manifold ( 2 ) are pressed together. Method according to at least one preceding claim, characterized in that the additional element ( 3 ) has a pearl-like shape and by heating effect the additional element ( 3 ) receives a deformable consistency wherein at least its surface has a weldable temperature and at the same time has by heating the diameter and the transition region ( 4 ) of the axial end ( 6 ) of the capillary tube ( 1 ) and that now by means of a die ( 5 ) the additional element ( 3 ) and the capillary tube ( 1 ) on the manifold ( 2 ) is pressed so that the additional element ( 3 ) of the diameter enlargement of the capillary ( 1 ) and at the same time combines with it by welding. Heating and / or cooling element according to already mentioned claims, consisting of a plastic mat ( 12 ) consisting of two headers ( 2 ) and at least two capillary tubes ( 1 ), whereby the headers ( 2 ) with the transverse thereto capillary tubes ( 1 ) are cohesively connected by welding and are traversed by a heating and cooling medium being at the axial end ( 6 ) of the capillary tube ( 1 ) on its outer diameter an additional element ( 4 ), characterized in that the additional element ( 3 ) is tubular prior to the manufacturing process and may have different outer diameters and / or on the inner diameter on the axial end ( 6 ) of the capillary tube ( 1 ) and the additional element ( 3 ) facing away from a radius-shaped transition ( 11 ) to his plan page. Device for producing a heating and / or cooling element according to previous claims, characterized in that the die ( 7 ) may have different inner diameters. Method and device for producing heating and / or cooling elements, consisting of a plastic mat ( 12 ) consisting of two headers ( 2 ) and at least two capillary tubes ( 1 ), whereby the headers ( 2 ) with the transverse thereto capillary tubes ( 1 ) are cohesively connected by welding and are traversed by a heating and cooling medium, characterized in that in the manufacturing process at the manifold ( 2 ) an area ( 10 ) around the radial flow bore ( 9 ) to the capillary tube section ( 13 ) is heated to weldable temperatures and that at the axial end ( 6 ) of the capillary tube section ( 13 ) on its outer diameter an additional element ( 3 ) with the capillary tube section ( 13 ) plane ending or up to the ½ length of the transition region ( 4 ) back on the capillary tube section ( 13 ) is positioned and by a on the additional element ( 3 ) acting clamping device ( 14 ), which on one side of the inner diameter, the shape of the die ( 5 ), axially in the direction of the collecting pipe ( 2 ) can be moved and that by heating effect, the diameter of the Kapillarrohrteilstückes ( 13 ) and the additional element ( 3 ) on the transition area ( 4 ) and by heating effect on the inner and outer diameter of the Kapillarrohrteilstückes ( 13 ) and at the inner diameter of the additional element ( 3 ) from the axial end ( 6 ) down to the transitional area ( 4 ) weldable temperatures are generated and that upon reaching the weldable temperature by means of the clamping device, the additional element ( 3 ) together with the capillary tube section ( 13 ) to the manifold ( 2 ) in the axial direction of the flow bore ( 9 ) are pressed together. Heating and / or cooling element according to claim 6, characterized in that in the inner diameter and / or on the plane surface of the additional element ( 3 ) a capillary tube ( 1 ) is arranged liquid-tight. Heating and / or cooling element, consisting of a plastic mat ( 12 ) consisting of two headers ( 2 ) and at least two capillary tubes ( 1 ), whereby the headers ( 2 ) with the transverse thereto capillary tubes ( 1 ) are cohesively connected by welding and are traversed by a heating and cooling medium, characterized in that an intermediate element ( 7 ) between manifold ( 2 ) and capillary tube ( 1 ) is arranged cohesively, wherein the intermediate element ( 7 ) on one side with its outer diameter cohesively in the radial flow bore ( 9 ) of the manifold ( 2 ) is arranged and / or has a flange-like transition and so with the manifold ( 2 ) and the intermediate element ( 7 ) on the other hand with the capillary tube ( 1 ) by a sleeve-shaped transition ( 8th ) or by a transition with the same outer diameter in conjunction. Heating and / or cooling element according to claim 8, characterized in that the intermediate element ( 7 ) in the transition area ( 4 ) is formed reinforced and in the flange-like transition on its outer diameter has a radius ( 15 ) or that on the intermediate piece ( 7 ) in the transition area ( 4 ) an additional element ( 3 ) is arranged. Heating and / or cooling element according to claim 8 and 9, characterized in that the intermediate element ( 7 ) is formed at an angle.

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