DE102018100584A1 - Motor vehicle license plate arrangement and motor vehicle hereby - Google Patents

Abstract

The invention relates to a motor vehicle license plate arrangement (1) having a motor vehicle license plate (2), which has a heat delivery element (10) which contacts the motor vehicle license plate (2) in a thermal contact zone (11), and wherein the heat discharge element (10) is connected to an energy source (10). 12) is connected. Moreover, the invention relates to a motor vehicle with such a motor vehicle license plate arrangement (1).

Description

The invention relates to a motor vehicle license plate arrangement according to the preamble of claim 1 and a motor vehicle having such according to claim 11.

In many countries there is a legal obligation of the vehicle driver to be identifiable by an always visible number plate. In addition, detection systems for detecting vehicle movements such as tolling devices, speed measuring stations or other control devices rely on the detection of the vehicle on the basis of the plate. By adhering snowfall, however, the license plate can be covered before and during operation of the motor vehicle.

The object of the invention is therefore to overcome the disadvantages of the prior art and to provide a device with which a covering of the plate is prevented by adhering snow.

Main features of the invention are specified in the characterizing part of claim 1 and in claim 11. Embodiments are the subject of claims 2 to 10.

The invention relates to a motor vehicle license plate arrangement with a motor vehicle license plate, which has a heat-emitting element, which contacts the motor vehicle license plate in a thermal contact zone, wherein the heat-emitting element is connected to a power source. With the help of the heat-emitting element, the indicator can be heated and snow can not adhere to this or is solved.

In a particular embodiment, the license plate is elongated and the thermal contact zone is distributed at least two-thirds of the length, i. especially either in one piece or segment by segment. As a result, the license plate is heated homogeneously and kept free of snow over the entire length.

In one variant, the heat-emitting element is a fluid conductor containing a fluid with a feed line and a discharge line. The fluid conductor can be designed either as a heating coil or as a flat heater. The advantage of this is that no electrical components must be protected against moisture. In addition, warm fluid is available anyway in most vehicles and can therefore be used for license plate heating.

In a specific embodiment, the supply line, the fluid conductor and the discharge line form a bypass to a coolant circuit of a motor vehicle. This is structurally simple and inexpensive to implement. In particular, the circulation is effected here without aids by the circulation of the coolant circuit of the motor vehicle.

Alternatively, however, the supply line and the discharge can also be connected to a heat exchanger, which is integrated in a coolant circuit of a motor vehicle. By such a separated circuit is avoided that, for example, a damage in the region of the indicator leads to a leakage of the coolant circuit of the motor vehicle. For the circulation of the fluid in the separated circuit may optionally be provided a fluid pump. Furthermore, an expansion tank can optionally be arranged in the separated circuit. This can compensate for thermal or assembly-related size changes.

According to a specific embodiment, it is provided that the heat exchanger is arranged geodetically lower than the fluid conductor of the heat-emitting element, wherein preferably the circulation of the fluid is caused independently by a thermosiphon effect, i. without pump. This is technically inexpensive and insensitive to interference implementable. For the snow clearance of the mark the circulation of the fluid by the thermosiphon effect, which is based on density differences at different temperatures, is usually sufficient.

Optionally, a valve is arranged in the supply line and / or the discharge. In an arrangement in the inlet or the discharge, the circulation of the fluid can be interrupted. If a valve is arranged in the inlet and outlet, it can additionally be prevented that fluid escapes from the coolant circuit of the motor vehicle, even if the bypass is defective.

In another variant of the invention, the heat-emitting element has an electrical heating conductor with electrical resistance. Such an electrical design can be installed with little effort and is particularly easy to implement as a retrofit solution. Preferably, the energy source is an electrical system of a motor vehicle or a self-sufficient battery. An electrical system is the preferred option, especially in regions with frequent snowfall. A supply of battery, however, is particularly easy to retrofit, for example in the form of a license plate holder with a battery compartment and the heat dissipation element.

Furthermore, it is provided in a more detailed embodiment that an operating element for activating the heat release is provided. This may, for example, be connected to the optional valves or the optional pump in order to actuate them, preferably electrically.

For retrofit solutions, the heat-dissipating element is preferably designed as part of a license plate holder. This minimizes installation costs for the customer.

The invention also relates to a motor vehicle with a motor vehicle license plate arrangement as described above and below. In such a motor vehicle it is ensured that the license plate is not covered by adhering snow.

• 1 eine Schemaskizze einer Kraftfahrzeugkennzeichenanordnung mit einem Wärmeabgabeelement in Form eines Fluidleiters mit einem Wärmetauscher;
• 2 eine Schemaskizze einer Kraftfahrzeugkennzeichenanordnung mit einem Wärmeabgabeelement in Form eines Fluidleiters mit einem Bypass; und
• 3 eine Schemaskizze einer Kraftfahrzeugkennzeichenanordnung mit einem Wärmeabgabeelement in Form eines elektrischen Heizleiters.

Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. Show it:

• 1 a schematic of a motor vehicle registration plate assembly with a heat transfer element in the form of a fluid conductor with a heat exchanger;
• 2 a schematic of a motor vehicle license plate assembly with a heat transfer element in the form of a fluid conductor with a bypass; and
• 3 a schematic of a motor vehicle license plate assembly with a heat-emitting element in the form of an electrical heating element.

In the 1 and 2 is a schematic diagram of a motor vehicle license plate arrangement 1 with a heat-dissipating element 10 shown which is a license plate 2 in a thermal contact zone 11 contacted. The heat-dissipating element 10 is in accordance with the 1 and 2 only in different ways with an energy source 12 connected.

It can be seen that the vehicle registration number 2 is elongated and the thermal contact zone 11 extends over more than two-thirds of the length. For this purpose, the heat-emitting element 10 a fluid conductor 30 containing a fluid F with a supply line 31 and a derivative 32 on. This runs meandering on the back of the vehicle license plate 2 and contacted the latter.

To 1 are the supply line 31 and the derivative 32 with a heat exchanger 33 connected, which in a coolant circuit 100 a motor vehicle is integrated. The energy source 12 So is the coolant circuit 100 , Preferably, the heat exchanger 33 from the coolant circuit 100 in countercurrent to the fluid F flows through to achieve a high heat transfer.

For a pumpless operation, like that of 1 is provided, the heat exchanger should 33 be arranged geodetically lower in the motor vehicle than the fluid conductor 30 the heat-emitting element 10 , This ensures that the circulation of the fluid F independently by a thermosiphon effect is effected. Alternatively, a pump in the separate circuit consisting of the fluid conductor 30 , the supply line 31 , the derivation 32 and the heat exchanger 33 to get integrated. In addition, a surge tank can be provided to thermal expansions of the fluid F to compensate in relation to the circulatory volume.

According to 2 form the supply line 31 , the fluid conductor 30 and the derivative 32 a bypass in a coolant circuit 100 of a motor vehicle. In order to be able to influence the activity of the heating, it is provided that in the supply line 31 and the derivative 32 one valve each 34 . 35 is arranged. With the help of a control element 13 with which the valves 34 . 35 can be actuated, the heat output can be activated and deactivated.

3 shows a schematic diagram of a motor vehicle license plate arrangement 1 with a heat-dissipating element 10 in the form of an electrical heating conductor 30 with electrical resistance. Again, contacted the heat-emitting element 10 the license plate 2 in a thermal contact zone 11 and is with an energy source 12 connected. The contact zone 11 is divided into several segments, which by a parallel connection of individual elements of the electrical heating element 30 are formed. The license plate 2 is elongated and formed by the segments thermal contact zone 11 is more than two-thirds of the length of the license plate 2 arranged distributed.

In a first connection conductor of the electrical heating conductor 30 is a control 13 arranged in the form of an electrical switch. Hereby the heat release can be activated. Alternatively, a sensor would be considered for the activation of heat dissipation. In a second connection conductor there is also a fuse 41 which the electrical heating conductor 30 protects against overload.

The energy source 12 , with which the first and second connection conductors of the electrical heating conductor 30 is connected, in the present case is a self-sufficient battery. Alternatively, a connection of the first and the second connecting conductor with the electrical system of a motor vehicle comes into consideration.

The invention is not limited to one of the above-described embodiments, but can be modified in many ways.

The heat-dissipating element 10 For example, each can be part of a license plate holder. Such a configuration facilitates in particular the assembly.

All of the claims, the description and the drawings resulting features and advantages, including design details, spatial arrangements and method steps may be essential to the invention both in itself and in various combinations.

LIST OF REFERENCE NUMBERS

1

Motor vehicle registration arrangement

2

Motor vehicle registration

10

Heat dissipation element

11

thermal contact zone

12

energy

13

operating element

30

fluid conductor

31

supply

32

derivation

33

heat exchangers

34

Valve

35

Valve

40

electrical heating conductor

41

fuse resistance

42

battery

100

Coolant circuit

F

fluid

Claims (11)

Motor vehicle number plate arrangement (1) with a motor vehicle license plate (2), characterized in that it has a heat-emitting element (10) which contacts the motor vehicle license plate (2) in a thermal contact zone (11), the heat-dissipating element (10) being connected to an energy source (12). connected is. Motor vehicle number plate arrangement (1) according to Claim 1 , characterized in that the motor vehicle license plate (2) is elongated and the thermal contact zone (11) is arranged distributed over at least two-thirds of the length. Motor vehicle license plate arrangement (1) according to one of Claims 1 or 2 , characterized in that the heat-emitting element (10) is a fluid conductor (30) containing a fluid (F) with a feed line (31) and a discharge line (32). Motor vehicle number plate arrangement (1) according to Claim 3 , characterized in that the supply line (31), the fluid conductor (30) and the discharge line (32) form a bypass to a coolant circuit (100) of a motor vehicle. Motor vehicle number plate arrangement (1) according to Claim 3 , characterized in that the supply line (31) and the discharge line (32) are connected to a heat exchanger (33) which is integrated in a coolant circuit (100) of a motor vehicle. Motor vehicle number plate arrangement (1) according to Claim 5 , characterized in that the heat exchanger (33) is arranged geodetically lower than the fluid conductor (30) of the heat-emitting element (10), wherein preferably the circulation of the fluid (F) is effected independently by a thermosiphon effect. Motor vehicle license plate arrangement (1) according to one of Claims 3 to 6 , characterized in that in the supply line (31) and / or the discharge (32), a valve (34, 35) is arranged. Motor vehicle license plate arrangement (1) according to one of Claims 1 or 2 , characterized in that the heat-emitting element (10) has an electrical heating conductor (40) with electrical resistance. Motor vehicle number plate arrangement (1) according to Claim 8 , characterized in that the energy source (12) is an electrical system of a motor vehicle or a self-sufficient battery. Motor vehicle number plate arrangement (1) according to one of the preceding claims, characterized in that an operating element (13) is provided for activating the heat output. Motor vehicle with a motor vehicle license plate arrangement (1) according to one of Claims 1 to 10 ,

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