ELECTRICAL HEATING APPARATUS

Abstract

An electrical heating apparatus for a motor vehicle includes a volume for receiving and conducting a liquid, a liquid inlet and a liquid outlet. The liquid can flow in through the liquid inlet into the volume and can flow out through the liquid outlet. At least one heating element is arranged in the volume. At least one deviating device is provided in such a way that the liquid flowing from the liquid inlet to the liquid outlet is deviated so that a flow path is increased.

Claims

1. Electrical heating apparatus for a motor vehicle, comprising a volume for receiving and conducting a liquid, a liquid inlet and a liquid outlet, in such a way that the liquid can flow in through the liquid inlet into the volume and can flow out through the liquid outlet, wherein at least one heating element is arranged in the volume, wherein at least one deviating device is provided in such a way that the liquid flowing from the liquid inlet to the liquid outlet is deviated so that a flow path is increased.

2. Electrical heating apparatus for a motor vehicle comprising a volume for receiving and conducting a liquid, a liquid inlet and a liquid outlet, in such a way that the liquid can flow in through the liquid inlet into the volume and can flow out through the liquid outlet, wherein a heating element is arranged in the volume, wherein the electrical heating apparatus is configured in such a way that it can be mounted and vented in at least two different installation positions.

3. Electrical heating apparatus according to claim 1, wherein the liquid inlet and the liquid outlet are arranged next to one another and/or on the same side of the electrical heating apparatus.

4. Electrical heating apparatus according to claim 1, wherein the liquid inlet and the liquid outlet are at a distance from one another which is less than half a maximum possible distance between two points inside the volume.

5. Electrical heating apparatus according to claim 1, wherein the liquid outlet lies either at the same height as or above the liquid inlet in at least three different installation positions.

6. Electrical heating apparatus according to claim 1, wherein the flow path increased by the deviating device is at least twice a distance between the liquid inlet and the liquid outlet.

7. Electrical heating apparatus according to claim 1, wherein the deviating device separates the volume into at least two subvolumes which are connected to one another by at least one or precisely one connecting opening, the connecting opening being further away from the liquid inlet than the liquid outlet is, and/or a heating element or a section thereof being arranged in both subvolumes.

8. Electrical heating apparatus according to claim 1, wherein the deviating device is arranged and oriented in such a way that a cross section of a liquid feed perpendicularly to a longitudinal extent of the deviating device narrows or widens in the shape of a funnel starting from the liquid inlet and/or the liquid outlet, and/or the deviating device extends diagonally from a first side to a second side.

9. Electrical heating apparatus according to claim 1, wherein at least one tubular heating body and/or at least one layer heater is provided as the heating element or a part thereof.

10. Motor vehicle comprising an electrical heating apparatus according to claim 1.

11. Method for operating a heating apparatus according to claim 1, wherein the liquid flows in through the liquid inlet and flows out from the liquid outlet with an increased temperature.

12. Method according to claim 11, wherein the liquid flowing out of the volume is used to heat an interior of a motor vehicle and/or to heat a propulsion element.

13. Use of a heating apparatus according to claim 1 as a preheating device and/or auxiliary heating device.

14. Electrical heating apparatus according to claim 1, wherein the electrical heating apparatus is a parking heater.

15. Electrical heating apparatus according to claim 1, wherein the liquid is water.

16. Electrical heating apparatus according to claim 1, wherein the heating element is a heating resistor.

17. Electrical heating apparatus according to claim 4, wherein the liquid inlet and the liquid outlet are at a distance from one another which is less than one quarter of the maximum possible distance.

18. Electrical heating apparatus according to claim 6, wherein the flow path increased by the deviating device is at least eight times a distance between the liquid inlet and the liquid outlet.

19. Electrical heating apparatus according to claim 1, wherein the deviating device is a separating wall.

20. Method according to claim 12, wherein the liquid flowing out of the volume is used to heat a passenger seat, and/or an engine.

Description

[0030] The disclosure will be described below with the aid of an exemplary embodiment, which will be explained in more detail with the aid of figures, in which:

[0031] FIG. 1 shows a schematic oblique view of a heating apparatus according to the disclosure;

[0032] FIG. 2 shows a side view (with partially transparently represented or permitted walls) of the heating apparatus according FIG. 1.

[0033] In the description below, the same references are used for parts which are the same and parts which have the same effect.

[0034] FIG. 1 shows a schematic oblique view of a heating apparatus according to the disclosure (whether the wall element 22 which can be seen in FIG. 2, so that it is possible to see partially into an interior of the electrical heating apparatus). A housing 10 of the heating apparatus is configured to be (approximately) cuboid (with rounded edges), so that a corresponding volume 11, which is defined by the housing 10, is also configured to be cuboid (with rounded edges). Inside the volume 11, there is a heating element 12, which in the present exemplary embodiment comprises a tubular heating body. In the presence of an electrical current, this tubular heating body 13 is heated so that a liquid (water) in the volume 11 can be heated.

[0035] The volume 11 is subdivided by a separating wall 14 (separating metal plate) into two subvolumes 15, 16. The separating wall 14 in this case extends diagonally (obliquely) from one (longitudinal) side wall 17 to an opposite side wall 18. On the side wall 17, there is a liquid inlet 19 and a liquid outlet 20 (specifically next to one another in relation to a longitudinal extent of the housing 10). Specifically, the liquid inlet 19 and the liquid outlet 20 are located in an end section 21 of the side wall 17. As an alternative, the liquid inlet may also be arranged at the reference 20 and the liquid outlet may be arranged at the reference 19.

[0036] Bores 21 can also be seen, which make it possible to mount the heating device.

[0037] FIG. 2 shows a side view of the electrical heating device according to FIG. 1, some elements (in particular walls) being represented transparently. In particular, it can be seen from FIG. 2 that the electrical heating resistor (heating element) 12 extends over (almost) the entire longitudinal extent of the volume (at least over 90% of this longitudinal extent). The heating resistor thus extends from one wall 22, through the heating element terminals 23, (almost) to the opposite wall 23. A distal end 24 of the separating wall 14 is likewise indicated in FIG. 2. It can furthermore be seen that the separating wall 14 extends from the wall 22 far into the volume (over more than of a longitudinal extent of the volume), but preferably not as far as the heating element 12. In any event, the liquid can flow around the distal end 24 through a connecting opening 25 from one subvolume into the other subvolume, so that liquid can flow from the liquid inlet 19 to the liquid outlet 20.

[0038] FIGS. 1 and 2 show a first installation position (horizontal), in which the water connections (liquid inlet 19 and liquid outlet 20) are arranged at one end on the side wall 17 (which in this case defines an upper side of the volume or water-carrying region).

[0039] In a second (possible) installation position (rotated through 90 degrees about a longitudinal axis), the water connections are located laterally (on a wall which is then oriented vertically) with respect to the water-carrying region (volume), the liquid outlet being located above the liquid inlet.

[0040] In a third (possible) installation position (vertical; rotated through 90 degrees about the transverse axis from the horizontal installation position), the water connections (liquid inlet 19 and liquid outlet 20) are arranged laterally at the upper end of the volume (water-carrying region). The fact that the volume 11 is subdivided into subvolumes 15, 16 ensures that liquid (water) does not flow directly from the liquid inlet to the liquid outlet 20 and thus avoid the heating element 12. The subdivision is made possible by the separating wall 14 (separating metal plate). The separating wall 14 is preferably made of metal and configured in the form of a plate (a thickness of the separating wall is preferably less than 4 mm, more preferably less than 2 mm). The deviating element (the separating wall 14) is arranged between the two water connections (liquid inlet 19 and liquid outlet 20) and this divides the water-carrying region (the volume) into two parts. A recess for flow over or around the separating wall 14 may optionally be provided only in the region which is at the greatest distance from the water connections (i.e. at the very bottom in a horizontal installation position), so that the water must flow around the entire heating element. For the purpose of venting or for controlled flow onto individual regions of the heating element, however, it may also be possible to a certain extent to provide further passages in the separating wall 14 (separating metal plate).

[0041] At this point, it should be pointed out that all parts described above are claimed as essential to the disclosure on their own or in any combination, in particular the details represented in the drawings. Variants thereof are familiar to the person skilled in the art.

REFERENCES

[0042] 10 housing [0043] 11 volume [0044] 12 heating element [0045] 13 tubular heating body [0046] 14 deviating device (separating wall) [0047] 15 subvolume [0048] 16 subvolume [0049] 17 side wall [0050] 18 side wall [0051] 19 liquid inlet [0052] 20 liquid outlet [0053] 21 bore [0054] 22 wall [0055] 23 wall [0056] 24 distal end [0057] 25 connecting opening