JPS637529Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention relates to a heating device for a vehicle.

[Conventional technology]

For cars equipped with a heating system, the thermostat is activated only after the engine has been warmed up and the coolant temperature has risen to around 50°C after a predetermined period of time has passed since the engine was started. Then, by operating a hot air fan or the like, hot air is blown out to heat the inside of the car. Therefore, with such a heating system, it takes some time after the engine is started to warm up and blow out hot air.
Even if the warm air fan is activated before the vehicle is warmed up, the interior of the vehicle and the seats are cooled by the cold air, making the driver and others feel colder.

In addition, engine technology has been improved to the point where it is possible to drive the car without almost needing to warm up the engine, but if heating the inside of the car is required depending on the region or season, the engine will eventually need to be driven. After that, the engine has to wait for a predetermined period of time, that is, for the engine to warm up, which results in wasted energy (fuel, etc.) and makes the engine uncomfortable due to the white smoke and odor emitted from the engine. There was a problem.

Therefore, a heating device that uses engine cooling water as a heat source and a heating device that uses an electric heater as a heat source are installed in the air passage, and a water temperature detector is placed in the cooling water circuit. It was proposed that the room be warmed by a heating device using a heating source as a heat source, and when the temperature exceeds a set temperature, engine cooling water is used to warm the room (Utility Model Publication No. 1808/1983).

[Problem that the invention attempts to solve]

However, it is difficult to appropriately heat the room by simply switching between a heating device that uses engine cooling water as a heat source and a heating device that uses an electric heater as a heat source. Particularly in cold weather, heating using only a heating device that uses engine cooling water as a heat source is insufficient, and it is difficult to properly warm the room. Furthermore, the method of heating the air in passageways using electric heaters has poor thermal efficiency, making it difficult to warm the body and consuming a large amount of power.

[Purpose of invention]

This invention was made to solve the above-mentioned inconvenience, and its purpose is to properly heat the room,
To provide a heating device for a vehicle that can appropriately warm the body in a short time even when it is particularly cold and consumes less power.

[Means for solving problems]

The configuration of the present invention to achieve the above object is to connect a temperature detection switch to a heating device that uses engine cooling water as a heat source and a heating device that uses an electric heater installed at the seat or foot as a heat source, and to connect both heating devices. is connected to a power source via a main switch, and a bypass switch is provided between the main switch and a heating device using the electric heater as a heat source.

[Effect of invention]

Each heating device can be turned on and off independently using temperature detection switches installed on both the heating device that uses engine cooling water as a heat source and the heating device that uses an electric heater as a heat source. Even if the heating system that uses the engine cooling water as the heat source and the heating system that uses the electric heater as the heat source are both turned on, and the temperature of the cooling water rises further and the heating system that uses the electric heater as the heat source is turned off, the bypass switch will not be activated. By turning on manually, the heating system that uses the electric heater as the heat source is activated.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a circuit diagram of an embodiment of the present invention. 1 is a heating device that uses engine cooling water as a heat source, and is installed in the air passage. On the other hand, numeral 5 is a heating device using an electric heater as a heat source, and is installed on the seat or near the feet. Each heating device 1, 5 has
Temperature detection switches 6 and 7 each consisting of a water temperature sensor are connected. The temperature detection switches 6 and 7 are constructed of unipolar thermostats as shown in FIG. 2, and are fixed to the cooling water system (for example, water jacket) of the engine. Incidentally, the temperature detection switches 6 and 7 may be semiconductor devices. Both heating devices 1 and 5 are connected to a power source (battery) 2 via a main switch 3, and a bypass switch 4 is connected between the main switch 3 and the heating device 5 whose heat source is an electric heater.
is provided.

When the engine cooling water is in a low temperature state, for example, below a predetermined set temperature of 50°C (regardless of whether the engine is started), the bimetal 9 of the temperature detection switch 7 is activated on the side of the heating device 5, as shown in FIG. Contact 8
, while the temperature detection switch 6 is open. At this time, by turning on the main switch 3, the power from the power source 2 heats the heating device 5 whose heat source is an electric heater provided on the seat or at the foot of the seat, and the room temperature rises.

After that, the engine is warmed up and the coolant temperature reaches 50.
When the temperature exceeds ℃, the contact 8 of the temperature detection switch 7 on the side of the heating device 5 is opened and the heating device 5 is turned off.
becomes. On the other hand, the temperature detection switch 6 on the side of the heating device 1
The bimetal 9 contacts the contact point 8, and the heating device 1
Heating is performed by switching to ON and operating the warm air fan. After that, if you want to further raise the room temperature as necessary, press bypass switch 4.
By manually operating both heating devices 1 and 5, it is possible to operate both heating devices 1 and 5 simultaneously. Therefore, the room can be appropriately heated. Both heating devices 1, even when it is especially cold
By arbitrarily operating 5, the room can be appropriately warmed, and in particular, the body can be appropriately warmed in a short time. Furthermore, since the heating device 5, which uses an electric heater as a heat source, is installed at the seat or footwell, it can warm the body more efficiently in a shorter time compared to a device installed in the air passage, and consumes less electricity. Become.

FIG. 3 shows the temperature detection switch 1 on the side of the heating device 5.
This figure shows another embodiment of the present invention in which 0 is configured with a room temperature sensor.

In this case, by using it together with the temperature detection switch 6 composed of a water temperature sensor on the side of the heating device 1, the indoor temperature can be kept at a predetermined temperature (for example, 20°C).
℃), the heating device 5 using an electric heater as a heat source can be turned off. When it is particularly cold, by manually operating the bypass switch 4, both heating devices 1 and 5 can be operated simultaneously to warm the room appropriately.

[Effect of idea]

As described above, the present invention connects a temperature detection switch to a heating device that uses engine cooling water as a heat source and a heating device that uses an electric heater installed near the seat or foot as its heat source, and connects both heating devices via the main switch. Since it is connected to a power source and a bypass switch is provided between the main switch and the heating device that uses the electric heater as a heat source, it can properly warm the room and warm the body in a short time even when it is especially cold. There is a practical benefit of reducing power consumption.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part thereof, and FIG. 3 is a circuit diagram of another embodiment of the present invention. 1... Heating device that uses engine cooling water as a heat source, 2...
...Power source, 3... Main switch, 4... Bypass switch, 5... Heating device using an electric heater as a heat source, 6, 7, 10... Temperature detection switch.

Claims (1)

[Scope of utility model registration request] A temperature detection switch is connected to each of the heating device that uses engine cooling water as a heat source and the heating device that uses an electric heater installed in the seat or footwell as a heat source, and both heating devices are connected to the power source via the main switch. A heating device for a vehicle, characterized in that a bypass switch is provided between the switch and the heating device using the electric heater as a heat source.