DE102008033143A1 - Heating device for heating interior of motor vehicle, has connection fixture with electrical connections for heating element, where one of connections is ground connection that is fastened to heat dissipation panel - Google Patents

Abstract

The device has a heat dissipation panel (1) with openings (2) through which fluid to be heated flows. The panel is thermo conductively connected with a heating element, and a connection fixture (5) is arranged at a front side of the heat dissipation panel. The connection fixture has electrical connections for the heating element, where one of the connections is a ground connection (12). The ground connection is fastened to the panel, and has two sides between which the panel is inserted. The ground connection is injected into the connection fixture.

Description

The invention relates to a heating device with the features specified in the preamble of claim 1. Such a heating device with a heat release panel formed from an extruded profile is from the WO 2007/071335 A1 known.

such Heating devices are used in particular for heating the interior used by vehicles. In the development of vehicle heaters The following requirements must be observed:

The Heating power should be as large as possible, so that Vehicle interior to be heated in the shortest possible time can; the vehicle heating should including the necessary Connections should be as small and compact as possible; the Production should be as cost effective as possible and the Assembly of the finished vehicle heating should be as possible be possible with little effort.

From the DE 20 2007 001 079 U1 a vehicle heater is known which has a terminal attachment with a connector receptacle that carries three contact tongues as potential terminals and a ground pin. The ground bolt is fixed by soldering or riveting to a contact plate having openings through which heating rods are inserted and thus contact the contact sheet. With a suitable connector, this vehicle heating can be quickly and easily connected to the electrical system of a vehicle; However, the production is expensive.

task The invention is to show a way how the production an electric heater, in particular also for Automobile should be suitable, further simplify.

These The object is achieved by a heating device with the specified in claim 1 Characteristics solved. Advantageous developments of the invention are the subject of the dependent claims.

A Heating device according to the invention carries on an end face of the at least one heat-dissipating panel a terminal attachment with electrical connections for the at least one heating element, wherein at least one of these terminals a ground connection is that clamping with the heat dissipation panel connected is. This way can be spent on a complex Welding or soldering omitted and with little effort to realize a ground connection, the for a high current carrying capacity is suitable and can be attached to the heat dissipation panel with little effort. Advantageously, therefore, an inventive Heating device to get along with a single ground connection, so that the heater can be made very compact.

Prefers is the connection attachment made of plastic. In particular, that the ground terminal is injected into the terminal attachment. In this way, advantageously the attachment of the connection attachment be improved on the heat release panel.

A advantageous development of the invention provides that the connection attachment forms a receptacle for a connector, in the potential connections the heating device are arranged. Here, the ground connection as well as the potential connections through a connector be contacted. But it is also possible that the Ground connection is contacted separately. The potential connections are preferably arranged as contact tongues.

The at least one heat-dissipating panel of an inventive Heating device is preferably an extruded profile, which is transverse to its extrusion direction was provided with openings. However, as heat-dissipating panels, it is also possible to use simple perforated sheets are used, on which heating elements with contained therein Heating elements can be attached, for example, cohesively, in particular by soldering or welding. Prefers if an extruded profile is used as the heat-dissipating panel, having the heat release ribs.

Of the Ground connection may be from adjacent heat delivery ribs be trapped. It is also possible that the ground connection has two legs between which the heat release panel is inserted. It is preferred that the legs of the ground terminal a greater width than the distance between two adjacent ones Have heat release ribs. Preferably, the legs act clamped on at least two heat release ribs. Possible it is also to provide slits in the thighs through which Heat release ribs protrude through, so that both sides a Base plate is clamped, from which the heat release ribs out.

Of the Connection attachment of a heating device according to the invention is preferably clamped to the at least one heat release panel attached. An advantageous development of the invention provides this before that the connection attachment has clamping ribs. By means of clamping ribs On the one hand, a sufficiently large clamping force on the Heat Exposure Panel be exercised and on the other hand the Contact surface between connection attachment and heat release panel kept low who the. This is especially true when using a Connection attachment made of plastic advantageous.

A advantageous development of the invention provides that the connection attachment first clamping ribs, which in a first direction a clamping force cause, and second clamping ribs, in a second direction cause a clamping force, wherein the second direction transverse to the first direction and transverse to the extrusion direction. On This way can be a particularly reliable Clamp the heat release panel. It is preferred that the first clamping ribs parallel to the second clamping ribs extend. This way it can be done in several places the heat output profile a clamping and positioning cause.

Further Details and advantages of the invention will become apparent to embodiments explained with reference to the accompanying drawings. Same and corresponding parts are identical Reference numbers marked. Show it:

1 an embodiment of a heating device according to the invention;

2 a side view of the terminal attachment of the heater;

3 the connection attachment of the heater from above;

4 a sectional view too 3 along the section line AA;

5 the heat release panel of the heater with ground connection;

6 : a detail of a side view too 5 ;

7 a detail of a rear view too 5 .

8th another view of the in 5 shown heat dissipation panel with ground connection; and

9 a further embodiment of a ground connection with the heat-dissipating panel;

10 a sectional view too 9 along the section line BB; and

11 a sectional view according to 10 a further embodiment.

In the 1 The heater shown has a formed by an extruded heat transfer panel 1 , the transverse to the extrusion direction openings 2 has, which are traversed by a fluid to be heated. The extruded profile 1 is for example made of aluminum and has several, in the illustrated embodiment, three, extending in the extrusion direction channels 3 on, which are formed in the illustrated embodiment as tubes.

Between the channel walls of these channels 3 are electrical heating elements, preferably made of a PTC material arranged. Heat discharge ribs run parallel to the channel walls 4 the heat release panel, where a flow of fluid to be heated can flow past. The heat release ribs 4 have the same lengths as the channels formed as tubes 3 in which the heating elements are arranged.

The heat output panel 1 stuck with a front side in a terminal attachment 5 carrying electrical connections for the heating elements. At its opposite end is the heat output panel 1 with a holder 6 provided for the installation of the heater in a vehicle. The holder 6 can be clamped to the heat release panel 1 be attached and has one or more pins 7 which engage in designated mounting holes of a vehicle.

In the channels formed as pipes 3 the heat release panel 1 plate-shaped PTC heating elements are arranged, which are not shown in the figures. The heating elements are powered electrically from the heat dissipating panel 1 isolated contact plate electrically contacted. To improve the Wärmeankopp development of the heating elements 8th to the heat output panel 1 can the rectangular tubes 3 be pressed after introduction of the heating elements.

The connection attachment 5 is stuck to the heat release panel 1 attached and has for this purpose a plurality of clamping ribs 10a . 10b . 10c on. The clamping ribs 10a . 10b . 10c run parallel to the heat release ribs 4 ,

In the illustrated embodiment, the terminal attachment acts 5 clamped on the channel walls of the heat output panel 1 a, where ....

For this purpose has the connection attachment 5 in 4 illustrated clamping ribs 10a . 10b . 10c , First clamping ribs 10a exert a clamping force parallel to the flow direction of a fluid flow to be heated. In the illustrated embodiment, press on the wide side of the rectangular cross-section of the tubes 3 several, namely two, first clamping ribs 10a , The connection attachment 5 also has second clamping ribs 10b which has a clamping force transversely to the clamping direction of the first clamping ribs 10a exercise. The second clamping ribs 10b we ken clamped on the narrow sides of the rectangular cross-section of the channels formed as tubes 3 one.

The second clamping ribs 10b have a clamping nose, which protrudes in the clamping direction and exerts the clamping force. In this way it is achieved that the second clamping ribs 10b only with an advantageously small area on the heat-dissipating panel 1 abut and thus absorb less heat.

In the illustrated embodiment, the terminal attachment has 5 in addition third clamping ribs 10c that ribs a pinch of the heat release ribs 4 cause. The third clamping ribs 10c can also be provided with a clamping nose. It is also possible that the third clamping ribs 10c flat on heat radiating ribs 4 issue. Heat removal fins farther from the heating elements have a lower temperature, so that a flat contact of clamping ribs 10c not or only insignificantly to a heat absorption of the connection attachment 5 leads. Contains the connection attachment 5 electronic components, for example power semiconductors, can be used over areas of heat discharge ribs 4 fitting clamping ribs 10c even an advantageous cooling of the electronic components can be achieved.

To attach the connection attachment 5 on the heat output panel 1 To facilitate, have the clamping ribs 10a . 10b . 10c Insertion bevels, which extend in the plugging direction.

The connection attachment 5 has interconnected side walls 11 , which is the end of the heat-dissipating panel in it 1 enclose. The clamping ribs 10a . 10b . 10c go thereby only from a side wall. The opposite side wall can be provided for tolerance compensation with small web-like elevations. The ground connection 12 juts down over the side walls 11 out. In this way, advantageously, a large contact area between the ground terminal 12 and the heat release panel 1 reached. The ground connection 12 protrudes upwards over the connection attachment 5 out.

In the 2 to 4 is the terminal attachment 5 shown in different views. The associated heat release panel 1 with the ground connection 12 is in 5 shown.

The connection attachment 5 carries a ground connection 12 , the two thighs 12a between which the heat release panel 1 plugged. This ground connection 12 is especially in the 6 to 8th to see who has a side and a rear view as well as a supervision too 5 demonstrate.

The thigh 12a of the ground connection 12 clamp the heat output panel 1 , In the illustrated embodiment, the legs of the ground terminal clamp two heat-dissipating ribs 4 , The width of the legs is therefore greater than the distance between two adjacent heat-emitting ribs 4 , In this way, a ground connection is realized, which is suitable for a large current carrying capacity. In the illustrated embodiment, the ground terminal 12 designed as a bolt.

The ground connection 12 is preferred in the connection attachment made of plastic 5 injected. In this way, the ground connection carries 12 in addition to fixing the connection attachment 5 on the heat release panel 1 at. In particular 3 shows, carries the terminal attachment 5 of the illustrated embodiment, only a single ground terminal 12 and a potential connection 13 for each of the channels 3 in which heating elements are arranged. Thus, in the illustrated embodiment, three potential terminals 13 available. The potential connections 13 are designed as contact tongues.

The connection attachment 5 forms a receptacle for a connector, so that the heater can be connected with little effort to the electrical system of a vehicle. In particular 4 shows, the ground connection protrudes 12 upwards from the connection attachment 5 out. The ground connection 12 is in particular longer than the potential connections 13 , This has the advantage that the ground connection through one of the potential connections 13 protruding contact connector and can be contacted separately, as is apparent from the DE 20 2007 001 079 U1 is known.

9 shows at a further embodiment, such as the ground terminal 12 clamped to the heat release panel 1 can be attached. The in 9 shown ground connection 12 is between two adjacent heat release ribs 4 trapped. The clamped section of the ground connection 12 can be cylindrically shaped in the simplest case, as in 10 is shown. Preferably, that of adjacent heat release ribs 4 clamped section of ground connection 12 However, a deviating from the circular cross-section. A particularly reliable clamping and, surprisingly, a contact surface suitable for high currents can be achieved in that the clamped portion of the ground terminal 12 Having edges that are plastically deformed during pressing between adjacent heat-dissipating ribs or plastically deform heat-dissipating ribs and thereby increases the contact surface ..

1

Wärmeabgabepaneel

2

openings

3

channels

4

Heat dissipation fins

5

connection article

6

bracket

7

spigot

10a, 10b, 10c

clamping ribs

11

side walls

12

ground connection

12a

leg

13

potential terminals

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 2007/071335 A1 [0001]
• - DE 202007001079 U1 [0004, 0041]

Claims (21)

Heating device with at least one electrical heating element, at least one heat-dissipating panel ( 1 ), which can be flowed through by a fluid to be heated ( 2 ) and is thermally conductively connected to the at least one heating element, and one at an end face of the at least one heat release panel ( 1 ) arranged connection attachment ( 5 ) with electrical connections for the at least one heating element, one of these connections being a ground connection ( 12 ), characterized in that the ground connection ( 12 ) clamped to the heat release panel ( 1 ) is attached. Heating device according to claim 1, characterized in that the ground connection two limbs ( 12a ), between which the heat release panel ( 1 ) plugged. Heating device according to claim 1 or 2, characterized in that the ground connection ( 12 ) in the annex ( 5 ) is injected. Heating device according to one of the preceding claims, characterized in that the ground connection ( 12 ) is formed as a slotted bolt. Heating device according to one of the preceding claims, characterized in that the connection attachment ( 5 ) forms a receptacle for a connector, in the potential connections ( 13 ) of the heating device are arranged. Heating device according to one of the preceding claims, characterized in that the heat-dissipating panel ( 1 ) is an extruded profile, wherein the openings ( 2 ) extend transversely to the extrusion direction. Heating device according to one of the preceding claims, characterized in that the heat-dissipating panel ( 1 ) Heat release ribs ( 4 ) having. Heating device according to claim 2 and 7, characterized in that the legs of the ground connection ( 12 ) at least two heat release ribs ( 4 ). Heating device according to claim 7, characterized in that the ground connection ( 12 ) of two adjacent heat release ribs ( 4 ) is clamped. Heating device according to one of the preceding claims, characterized in that the heat-dissipating panel ( 1 ) a channel ( 3 ), in which the at least one heating element is arranged between channel walls. Heating device according to claim 10, characterized in that the channel ( 3 ) is designed as a tube. Heating device according to one of the preceding claims, characterized in that the connection attachment ( 5 ) clamped to the at least one heat release panel ( 1 ) is attached. Heating device according to claim 12, characterized in that the connection attachment ( 5 ) Clamping ribs ( 10a . 10b . 10c ) having. Heating device according to claim 13, characterized in that the clamping ribs ( 10a . 10b . 10c ) are bevelled. Heating device according to claims 13 or 14, characterized in that the connection attachment ( 5 ) first clamping ribs ( 10a ), which cause a clamping force in a first direction, and second clamping ribs ( 10b ) effecting a clamping force in a second direction, the second direction being transverse to the first direction. Heating device according to claim 15, characterized in that the first clamping ribs ( 10a ) parallel to the second clamping ribs ( 10b ). Heating device according to claim 16, characterized in that the second clamping ribs ( 10b ) have a clamping nose projecting in the second direction. Heating device according to one of claims 10 to 17, characterized in that the connection attachment ( 5 ) clamped on both a base plate of the heat release panel ( 1 ), in which the openings ( 2 ) are arranged, as well as acts on at least one of the channel walls. Heating device according to one of the preceding claims, characterized in that the connection attachment ( 5 ) with interconnected side walls ( 11 ), one end of the heat release panel ( 1 ) surround. Heating device according to claim 20, characterized in that the ground connection ( 12 ) down over the side walls ( 11 protruding). Heating device according to claim 20 or 21, characterized in that the ground connection ( 12 ) upwards from the connection attachment ( 5 ) ago protrudes.