WO2003045747A2

WO2003045747A2 - Device and method for heating at least one window pane in a motor vehicle

Info

Publication number: WO2003045747A2
Application number: PCT/DE2002/004261
Authority: WO
Inventors: Hubert Koch
Original assignee: Care Key Gmbh
Priority date: 2001-11-19
Filing date: 2002-11-19
Publication date: 2003-06-05
Also published as: AU2002365285A1; AU2002365285A8; DE10295476D2; WO2003045747A3

Abstract

Iced up windows require considerable scraping from a driver during cold starts of motor vehicles in order to see clearly out of said motor vehicles. The aim of the invention is to provide a mobile heating device for at least one window pane in a motor vehicle, which can be used for easy de-icing . Said device includes a device for the production of an air flow and a heat source. The heat source includes an electrical resistor which has an output of less than 150 watts, preferably 15 watts.

Description

Mobile heater, arrangement of an air control system of a motor vehicle and at least one heat source and arrangement of a plurality of mobile heaters and method for heating at least one

Vehicle window

The invention relates, on the one hand, to a mobile heater for heating at least one motor vehicle window with a device for generating an air flow and a heat source. On the other hand, the invention relates to an arrangement of an air control system of a motor vehicle and at least one heat source with an electrical resistance for heating at least one motor vehicle window and an arrangement of a large number of mobile heating devices. In addition, the invention relates to a method for heating at least one Kraftfalrrzeugscheibe, in which an air flow is heated with an electrical resistance.

In winter in particular, it is a problem that the windows of a motor vehicle are often fogged up or covered with a layer of ice or snow. Especially in the morning after a frosty night, the car windows are almost always covered with a layer of ice. In such cases, the driver is obliged - for safety reasons alone - to ensure an adequate view from the motor vehicle before starting the journey. This is done either through elaborate Scraping or by means of an auxiliary heater, which almost always has to be costly retrofitted. However, if the latter is saved, there is also the problem that the panes, which have been freed of ice and snow by scraping, may fog up on the inside. This danger exists, at least until the vehicle has reached its operating temperature.

In order to save the hassle of such scraping work and also to avoid retrofitting an expensive parking heater, electrically operated heating devices are known which are arranged inside the power tool and with which defrosting of power tool windows is to be facilitated.

For example, utility model DE 81 30 799 UI describes an electrically heating additional blower for deicing a car windscreen. This is placed on the dashboard of a motor vehicle and connected to a cigarette lighter. The additional blower heats up an air flow using a wire helix and the heated air flow is fed to the inside of the car windscreen via nozzles. However, the disadvantage of such an electrically operated and heating additional fan is the high energy consumption, so that a battery of the motor vehicle that is already very heavily loaded by the cold is additionally loaded. The consequence of this is that electric auxiliary heaters cannot be operated for a sufficient period of time until the front windscreen is almost completely defrosted. Or the battery will affected by the operation of the auxiliary fan in such a way that it no longer has enough power to start a cold engine. Often, therefore, the electric, heating auxiliary fan is only switched on when the engine is running and is preferably operated until the engine of the car generates enough heat so that the vehicle's own heating system provides a sufficiently warm air flow that further de-ices the car windscreen.

It is an object of the present invention to further develop such an additional electric heating fan, so that one or more power-driven disks can advantageously be defrosted.

The object of the invention is achieved by a mobile heater for heating at least one motor vehicle window with a device for generating an air flow and a heat source, in which the heat source has an electrical resistance which has an output of less than 150 watts, preferably less than 15 watts , having.

Surprisingly, it has been shown that a heat source with such a low output is already sufficient to clear ice and / or snow-covered Kraftfalir discs from ice and snow, so that a clear view from the Kraftfalirzeug is possible.

Numerous tests have shown that the temperature of a pane can easily be increased by a few degrees Celsius using the mobile heating device according to the invention, so that can be increased a few degrees Celsius so that they can be defrosted or freed of ice or snow much more easily.

In addition, such a temperature increase advantageously ensures that the windows fog up at least less from the inside, or not at all, even if people are already sitting in the power tool and the engine heating of the power tool has not yet reached its operating temperature and thus the power tool's own ventilation and heating device has not yet reached its full potential.

The function of the mobile heater is provided with an extremely low energy consumption, so that it differs significantly from a hair dryer. Since such a principle of operation is dispensed with, in particular a motor vehicle battery is loaded very little or the use of an energy source such as a battery or an accumulator is readily possible.

It is particularly advantageous here if the heat source has an electrical resistance of less than 150 Ol m, preferably less than 100 Ol m. In particular, a usual resistance between 10 olim and 100 ohm can be used as the heat source. In connection with the described performance, a small current is already sufficient to heat an air flow accordingly, so that a motor vehicle windshield can be heated sufficiently without placing an additional load on a motor vehicle battery. Furthermore, it is advantageous if the device for generating an air flow in the operating state has a current flow of less than 1 A, preferably less than 100 mA. So that the mobile heating device requires as little electrical energy as possible in order to function adequately, it is advantageous to provide a fan or blower which requires such a low current flow but nevertheless generates a sufficiently strong air flow.

As a result, the mobile heater can easily be operated with the power battery for a longer period of time. The energy consumption of the mobile heater is so low that it can be operated for several hours without problems, depending on the condition of the power battery, for several days and the battery continues to have sufficient power to start a cold engine.

One embodiment variant provides that the mobile heating device has its own energy source. For example, the mobile heater comprises a battery so that it does not require a motor vehicle battery or another external energy source. This is particularly advantageous in the cold season, since the motor vehicle battery is not loaded by the mobile heater, so that there is still sufficient power from the motor vehicle battery to operate the motor vehicle. However, this may only play a subordinate role in modern motor vehicles with relatively powerful batteries. In addition, it is also possible to use an accumulator as an energy source, which is recharged after use, for example. For this purpose, the motor vehicle current can advantageously be used, so that the accumulator can be recharged while the engine is running. In this way, too, the battery of the power tool is protected if it is not very resilient, especially in the cold season. It is conceivable that the energy source of the mobile heating device is additionally or exclusively charged by energy from solar cells. The own energy source of the mobile heating device is thus supplied with energy during the day, which is then available to operate the mobile heating device in particular before the start of the journey.

The mobile heater preferably works with 6 V, 12 V or 24 V, it being conceivable to provide a corresponding switch in order to adapt the mobile heater to different motor vehicle energy sources if necessary.

In addition, it is advantageous if the mobile heater has at least one flexible air guide hose. In order to align a warmed air flow in a suitable manner, it is advantageous if at least one short air guide hose with adjustable air guiding means is provided, with which the warmed air flow is deflected in the desired manner. It turns out that the mobile heating device can have several such flexible hoses, in order to bring a warmed air flow over a wide area to one or more Kraftfalirzeug discs. Such a hose can have a plurality of openings along its longitudinal axis, so that the warmed air stream reaches the Kraftfalirzeug discs at a plurality of locations.

A preferred embodiment variant provides that at least one heat source is arranged in an air guide tube. This makes it possible to warm up an air flow only before the warmed air flow emerges from an air guide tube of the mobile heating device, so that the warmed air flow brings the thermal energy directly to the motor vehicle window to be warmed with as little losses as possible.

So that the mobile heater according to the invention is as compact as possible and can thus be easily arranged on a power tool, it is advantageous if the mobile heater has a housing with a holding device. A housing ensures that all required components, such as current-carrying elements, are arranged in a protected manner in the housing, so that the overall arrangement is relatively compact and, if necessary, is only connected to the car battery with a cable, for example via the cigarette lighter of the motor vehicle. A fan or a fan for generating an air flow and a heat source are essentially arranged in the housing of the mobile device. If the mobile heater has its own energy source, there is no need for a connection cable. The mobile heater can thus be arranged particularly flexibly in different areas in the interior of the power tool. Advantageously, the device Housing for such an arrangement on a holding device for attachment to a Kraftfalirzeug. The holding device is, for example, a suction cup or a magnet. The holding device can also comprise a carrying handle with which the mobile heating device can advantageously be carried.

The object of the invention is also achieved by an arrangement of an air control system of a motor vehicle and at least one heat source with an electrical resistor for heating at least one motor vehicle window, in which the electrical resistor has a power of less than 150 watts, preferably less than 15 watts , having. With such an arrangement, the ventilation paths already present in the motor vehicle can advantageously be used, the heat source or the electrical resistance serving as an additional heating device, while the main thermal energy for an air flow is still provided by the heat of the motor vehicle engine, if this occurs has reached its operating temperature for some time. In this respect, this arrangement makes it possible, even when the engine is cold or even before the engine is started, to generate a warmed air flow via the additional heating device, which air stream can advantageously be used to defrost the windows.

Heated air hoses or similar arrangements, which are used for guiding the corresponding air flow and are provided with heating devices, are also suitable as additional heating devices, in particular in this embodiment. The term "air control system of a motor vehicle" essentially adjusts the power unit's own ventilation, which essentially has a blower and an engine heater. A corresponding air flow can be provided on the one hand by the ventilation device which is present in any case, or on the other hand by an additional fan.

In order to keep the energy consumption of the additional heat source as low as possible and still provide a sufficiently warmed air flow, it is advantageous if the heat source has an electrical resistance of less than 150 olm, preferably less than 100 olim.

Both in the case of the mobile heater and in the case of an arrangement with a heat source permanently installed in the air control system of a motor vehicle, it is advantageous if the heat source has a heat-conducting body. The heat-emitting surface of the heat source is advantageously increased by means of the heat-conducting body, so that the heat generated by the electrical resistance can be released to the surroundings much more quickly and easily. For example, such a heat-conducting body consists of a simple metal sheet that increases the surface of the heat-conducting body. However, metallic fins or foils are also advantageous, which likewise enlarge the heat-emitting surface of the heat source.

Furthermore, it is advantageous if the mobile heater or the arrangement has at least one thermostat with a heat source permanently installed in the air control system of a motor vehicle. For example, grouted the thermostat via temperature sensors, which determine an outside temperature and / or an inside temperature of the vehicle. It is of advantage if a Temperatiirfuhler ziunindest in the interior of Kraftfalirzeuges near one is arranged to be de-iced area or with DIE ser is so connected that the Temperaftu ^~ sensor directly detects the temperature of the component to be deiced.

Furthermore, it is advantageous if both the mobile heater and the arrangement with a heat source permanently installed in the air control system of a power tool have a programming device. It is possible that at least one temperature tank has a connection to the programming device which switches the mobile heating device or the arrangement with a heat source permanently installed in the air control system of a power tool. It is also advantageous that the programming device interacts with a heating device of a motor vehicle rear window, so that the actuation of the rear window heating is also automatically switched by the programming device.

In addition, the programming device can monitor the capacity of an energy source, in particular the capacity of the car battery. In this context, it can be determined, for example, whether the car battery is already weakened in such a way that it is overwhelmed by the operation of the mobile heater or the additional heat source or the fan of the motor vehicle ventilation. This can prevent additional energy from being drawn from an already weakened battery. gene that is urgently needed to start the engine and / or to operate other electrical systems of the motor vehicle.

In addition, it is advantageous if the mobile heating device, preferably the programming device, has a timer. For example, a time switch of the programming device is set to 8:00 a.m., so that de-icing of the motor vehicle disks begins at this time. However, if a temperature sensor detects a temperature above freezing at this time, activation is prevented.

It turns out that the mobile heater or the arrangement described, in particular by means of the above-mentioned programmer device, is activated on the one hand at a certain point in time and on the other hand is only activated when the temperature calibrates a value below the freezing point. In the last variant, an interval is preferably created in which such an activation is permitted, since it makes little sense to carry out an activation if no use of the power tool is provided. For example, this is often the case at night, provided the vehicle is not needed.

Furthermore, it is advantageous if the described mobile heating device or the described arrangement have a remote control. As a result, activation for heating motor vehicle windows can also be carried out manually without the vehicle driver having to go to the motor vehicle to carry out the activation on site. The object of the invention is also achieved by an arrangement comprising a plurality of mobile heaters described above, in which at least one mobile heater is a central device. In the case of larger motor vehicles in particular, it may not be possible to adequately calibrate all of the panes from a central point. In this case, on the one hand, several devices according to the invention can be used, which, however, are then relatively complex to operate or operate, since they would each have to be controlled separately. Accordingly, it is proposed, starting from at least one central device, to control additional devices which are readily attached to favorable positions in the interior of the motor vehicle. Here, the central device preferably includes the power supply and a corresponding control, such as a timer and / or a radio receiver. The additional devices preferably each have only one heat source and one fan and, if necessary, means for directing the air flow, such as a flexible hose, adjustable nozzles or the like. In addition, the additional devices can include a housing and corresponding holding devices. All other devices can be provided in the central device, but depending on the specific requirements, other allocations, in particular separate energy sources for the additional devices, are also conceivable.

In addition, the object of the invention is achieved by a method for heating at least one force plate, in which an air flow is heated with an electrical resistance and the electrical resistance of less than 150 watts, preferably less than 15 watts.

On the one hand, this ensures that an energy source is not overloaded by the energy consumption of the electrical resistance. On the other hand, with such a power, an air flow can be adequately warned by means of an electrical resistance, so that a motor vehicle window is thereby warmed up and de-iced.

An embodiment variant provides that an outside temperature is determined and, depending on the outside temperature, the heating of the motor vehicle window is activated and / or deactivated. In this case, an outside temperature filler averages the temperature of the surroundings, so that the starting time and the running time of the heating of the power tool are switched depending on the outside temperature.

If a plurality of mobile heating devices are arranged in an interior of a power tool, it is advantageous if at least one mobile heating device communicates with at least one further mobile heating device.

Further objectives, advantages and properties of the present invention are explained on the basis of the description of the attached drawing, in which, by way of example, a mobile heating device and an arrangement comprising a ventilation device of a power tool and various heat sources are shown.

It shows Figure 1 is a perspective view of a mobile heater and

Figure 2 schematically shows a view of Wäπne sources which in one

Air control system of a Kraftfalirzeuges are arranged.

The mobile heater 1 shown in FIG. 1 has a housing 2, on which two flexible air guide hoses 3 and 4 are arranged on the side. The mobile heater 1 is attached to a dashboard 6 of a power tool (not shown here) by means of a holding device 5.

In the interior of the housing 2, the mobile heater 1 has a fan 7, which sucks in air masses 8 from a lower region 9 and is distributed widely over a motor vehicle windshield 10 by means of the flexible air guide hoses 3 and 4 of the mobile heater 1.

In order to distribute the sucked-in air masses 8 widely, they flow out of openings 11, 12 and 13 (numbered here only by way of example) of the housing 2 and the flexible air guide tubes 3 and 4 against the motor vehicle windshield 10.

So that the motor vehicle windshield 10 is de-iced particularly quickly, the sucked-in air masses 8 are heated by means of heat sources 14, 15 and 16 (numbered here only by way of example), so that air masses 17, 18 and 19 warmed at the openings 11, 12 and 13 (only here for example) - Risch figured) exit and defrost the icy Kraftfal windshield 10. The surfaces of the heat sources 14, 15 and 16 are each enlarged by a heat conducting body 15A (here numbered only as an example). ßert, so that a Wäπneergie the heat sources 14, 15 and 16 can be released faster to the intake air masses 8.

In order to activate the function of the mobile heating device 1 at a desired point in time, the mobile heating device 1 comprises a programming device 20 with a timer 42. The programming device 20 is also in contact with a temperature liquidator 20A in order to possibly determine the internal temperature of the motor vehicle ,

The electrical devices of the mobile heater 1 are supplied with energy via an electrical line 21. For this purpose, the electrical line 21 is plugged with its connection 22 into a cigarette lighter (not shown here) of the power tool.

The arrangement 23 shown in FIG. 2 shows a cockpit 24 of a motor vehicle (not shown here). The arrangement 23 essentially comprises an air guide system 25 which has a multiplicity of air guide rods 26, 27, 28, 29 and 30, via which the air masses 32 sucked in by a fan 31 are distributed in an interior 33 of a motor vehicle. For this purpose, the air ducts 26 to 30 end at different locations in the interior of the motor vehicle 33.

The arrangement 23 comprises an engine heater 34 with which the sucked-in air masses 32 can be heated up in vehicle operation.

In addition, in some air ducts 26, 27 and 28 additional heat sources 35, 36, 37 are arranged, which are connected to the fan 31. sucked in air masses 32 without the engine heater 34 having to be active. The surfaces of the heat sources 35, 36 and 37 are also enlarged in this exemplary embodiment by a heat guide 36A (numbered here only as an example), so that a thermal energy of the heat sources 35, 36 and 37 can be released to the sucked-in air masses 32 more quickly.

The air masses 32 mentioned in accordance with the invention are guided through the vehicle's own ventilation outlets 38 (numbered here only by way of example) at various points against an icy motor vehicle windshield 10 (see FIG. 1).

In this exemplary embodiment, the heat sources 35, 36 and 37 each consist of a Dralit coil, which has an electrical resistance of 50 olim and is supplied with electrical energy by the motor vehicle's own battery.

Here, the fan 31 and the heat sources 35, 36 and 37 are switched in such a way that they are activated together by a programming device 39. The programming device 39 also receives, by means of an internal temperature filler 40 and an external temperature sensor 41, precise data on the temperature in the interior of the power tool and information on the temperature in an external area. This allows the intensity of the heating power and the heating duration to be regulated, so that the heat sources 35, 36 and 37 can be activated and deactivated in a targeted manner.

Claims

claims:

1. A mobile heater (1) for heating at least one motor vehicle window (10) with a device (7; 31) for generating an air flow and a heat source (14, 15, 16; 35, 36, 37), characterized in that the WännequeHe ( 14, 15, 16; 35, 36, 37) has an electrical resistance which has an output of less than 150 watts, preferably less than 15 watts.

2. Mobile heater (1) according to claim 1, characterized in that the WännequeHe (14, 15, 16; 35, 36, 37) have an electrical resistance of less than 150 Olim, preferably less than

100 ohms.

3. Mobile heater (1) according to one of claims 1 or 2, characterized in that the device (7; 31) for generating an air flow in the operating state has a current flow of less than 1 ampere, preferably less than 10 milliamperes.

4. Mobile heater (1) according to one of claims 1 to 3, characterized by its own energy source.

5. Mobile heater (1) according to one of claims 1 to 4, characterized by at least one flexible air guide hose (3, 4).

6. Mobile heater (1) according to one of claims 1 to 5, characterized in that at least one Wäπnequelle (14, 15, 16; 35, 36, 37) is arranged in an air guide tube (3, 4).

7. Mobile heater (1) according to one of claims 1 to 6, characterized in that the mobile heater (1) has a housing (2) with a holding device (5).

8. Anordnimg (23) from an air control system (25) of a Kraftfalirzeugsdd at least one WännequeHe (14, 15, 16; 35, 36, 37) with an electrical resistance for heating at least one motor vehicle window (10), characterized in that the electrical resistance has a power of less than 150 watts, preferably less than 15 watts.

9. The arrangement (23) according to claim 8, characterized in that the heat source (14, 15, 16; 35, 36, 37) has an electrical resistance of less than 150 olim, preferably less than 100 ohm.

10. Arrangement (23) according to one of claims 8 or 9, characterized in that the heat source (14, 15, 16; 35, 36, 37) is arranged in an air control system (25) of the Kraftfalirzeugs.

11. Mobile heater (1) according to one of the preceding claims or arrangement (23) according to one of the preceding claims, characterized characterized in that at least one WännequeHe (14, 15, 16; 35, 36, 37) has a Wäπneleitkörper (15A; 36A).

12. Mobile heater (1) according to one of the preceding claims or arrangement (23) according to one of the preceding claims, characterized by at least one thermostat, which preferably has an outside temperature sensor (41) and an inside temperature sensor (20A; 40).

13. Mobile heater (1) according to any one of the preceding claims or Anordnimg (23) according to one of the preceding claims, core 'characterized by a Programmeinrichtimg (20).

14. Mobile heater (1) according to any one of the preceding claims or arrangement (23) according to any one of the preceding claims, characterized by a timer (42).

15. Mobile heater (1) according to one of the preceding claims or arrangement (23) according to one of the preceding claims, characterized by a remote control.

16. An arrangement of a plurality of mobile heaters (1) according to one of the preceding claims, characterized in that at least one mobile heater (1) is a central device.

17. The method of heating at least one motor vehicle disc (10), in which an air flow with an electrical resistance is warned, characterized in that the electrical resistance takes up a power of less than 150 watts, preferably less than 15 watts.

18. Falsify according to claim 17, characterized in that an outside temperature is determined and, depending on the outside temperature, the heating of the power glass (10) is activated and / or deactivated.

19. Verfaliren according to one of claims 17 or 18, characterized in that at least one mobile heater (1) communicates with at least one other mobile heater (1).