JPH11208250A - Heating apparatus for vehicle cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make warm air blow into a vehicle cabin before the engine of a vehicle becomes warm. SOLUTION: Opening/closing valves 4, 5 are disposed in an inlet pipe 2 for leading warm water from the engine to a heater core 1 and in an outlet pipe 3 for leading the warm water used for heater exchange so that those pipes are closed when the engine is stopped and until the engine is heated to a constant temperature. A bypass pipe 6 is disposed for connecting the inlet pipe 2 and the outlet pipe 3 which are close to the heater core 1 so as to constitute a local closed circuit 7 around the heater core 1. A sheath type plug heater 9 for heating water in a catch tank 8 and a pump 10 for circulating warm water are disposed in the closed circuit 7. A receptacle 14 connectable to a household power source and a plug receptacle 15 connectable to a vehicle battery power source are provided so that water within the closed circuit 7 is heated and circulated when the engine is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for heating the interior of a vehicle so that a heating effect can be obtained even before the engine is warmed up.

[0002]

2. Description of the Related Art Conventionally, for example, a device as shown in FIG. 4 is generally used as an indoor heating device for a vehicle. This device is
The interior of the room is heated by using a part of the cooling water whose temperature is increased by cooling the engine (not shown).
2 and exchanges heat with the air passing through the heater core 52 to warm the air, blows out the heated air into the room, and draws out the heat-exchanged hot water from the outlet pipe 53. A water valve 55 operated by a motor 54 is provided in the introduction pipe 51, and the motor 54 is controlled by a control unit 56.

[0003]

However, when the engine is not warm, such as immediately after starting the engine, the temperature of the water does not rise. There is a weak point that only the air is blown out and a feeling of heating cannot be obtained. Therefore, if the engine is to be warmed by, for example, a warm-up operation, it is not preferable to prevent global warming.

[0004] Therefore, the present invention provides a method for performing warm-up
The purpose is to provide a feeling of heating immediately after riding.

[0005]

To achieve the above object, according to the present invention, in the first aspect, hot water sent from an engine is sent to a heater core through a water guide pipe by operation of a control unit, and heat of the hot water is converted to air by the heater core. After transferring heat and exchanging heat, the heat exchanged hot water is drawn out from the outlet pipe, and the air inlet and outlet pipes near the heater core are connected by a bypass pipe in a vehicle indoor heating system that blows air into the room. At the same time, an on-off valve is provided on each of the inlet pipe and the outlet pipe on the engine side from the bypass pipe so that a local closed circuit is formed from the bypass pipe to the heater core. Heating means for raising the temperature of the vehicle to a predetermined temperature, and the heating means is driven by either a power supply for domestic use or a power supply for a vehicle battery. Was to so that.

If a local closed circuit is formed on the heater core side and the water in the closed circuit is heated by the heating means, the temperature of a small amount of water can be effectively increased. By preparing using a household power supply or a battery power supply before starting the engine, warm air can be blown out immediately after the engine is started.

Here, the heating means is optional. For example, a sheath-type plug heater containing a heating wire in a tube may be used.
If it is configured by inserting it into a catch tank storing a small amount of water, the configuration can be simplified. In order to use either the home power supply or the vehicle battery power supply, it is convenient to prepare a plurality of connectors that can be connected to both power supplies, for example. In particular, when using the vehicle battery power supply, for example, the electrical connection is performed after the key is operated to the start preparation position of the engine,
It is preferable to avoid discharging the battery.

According to a second aspect of the present invention, a circulating means for circulating water inside the closed circuit is provided, and the circulating means can be driven by either a home power supply or a vehicle battery power supply. .

If the hot water heated by the heating means is circulated in the closed circuit by the circulation means, the hot water in the closed circuit can be efficiently heated. Here, as the circulation means, for example, a pump driven by a household power supply or a vehicle battery power supply can be applied.

In the present invention, the temperature of the water in the closed circuit is controlled to be constant after the temperature rises to a constant value. If the temperature of the water in the closed circuit is controlled to a constant temperature in this manner, the temperature of the hot air when blowing out the heating air is controlled to be constant and comfortable, and the power source of the heating means is a vehicle battery power source. Even in such cases, do not waste power.

According to a fourth aspect of the present invention, the opening and closing valves of the inlet pipe and the outlet pipe are automatically opened when the temperature of the hot water sent from the engine rises to a predetermined temperature or higher. After the engine has been warmed in this way, by controlling the on-off valve to open and returning to a normal heating state, a heating effect can be continuously obtained.

[0012]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a diagram showing a first configuration example of an indoor heating device according to the present invention, FIG. 2 is a diagram showing a second configuration example of an indoor heating device according to the present invention, and FIG. 3 is a third configuration of an indoor heating device according to the present invention. It is an example figure.

The interior heating system for a vehicle according to the present invention is capable of introducing warm air into a room from a stage immediately before the engine is warmed, such as immediately after the engine is started, and as shown in FIG. On-off valves 4, 5 provided on an inlet pipe 2 for connecting the illustrated engine to the heater core 1 and an outlet pipe 3 for discharging hot water heat-exchanged by the heater core 1.
And a bypass pipe 6 connecting the inlet pipe 2 and the outlet pipe 3 on the side of the heater core 1 from the on-off valves 4 and 5. When the on-off valves 4 and 5 are closed, the bypass pipe 6 A closed circuit 7 that is partially closed partially over the heater core 1 and the outlet pipe 3 is configured.

In this closed circuit 7, a catch tank 8 storing a small amount of water is provided in the middle of the bypass pipe 6,
A sheath type plug heater 9 as a heating means is inserted into the catch tank 8 so that water inside can be heated, and a pump as a circulating means is connected to the bypass pipe 6 between the outlet pipe 3 and the catch tank 8. 10 is provided so that heated hot water can be sent toward the introduction pipe 2 and circulated in the closed circuit 7 in the direction of the arrow.

The on-off valves 4 and 5 are opened and closed by the operation of a motor 13 under the control of a control unit 12, and the operation of the pump 10 and the operation of a sheathed plug heater 9 are also controlled by the control unit 12. It is supposed to be. And these motors 13,
Also, power for operating the pump 10 and the sheathed plug heater 9 is also supplied via the control unit 12, so that the control unit 12 has an outlet 14 for receiving power from a household AC 100V power supply. A plug outlet 15 for receiving power from a DC 12V power supply of a vehicle battery is provided. Then, AC and DC are generated inside the control unit 12.
The conversion and the transformation are performed. By the way, DC
When 12V and AC100V are supplied simultaneously, A
C100V is used preferentially so that the load on the battery can be reduced.

A temperature sensor 16 is attached to the bypass pipe 6 in the closed circuit 7 between the catch tank 8 and the introduction pipe 2, and a detection signal of the temperature sensor 16 is taken into the control unit 12. I have. The sheath type plug heater 9 is controlled by the temperature sensor 16. For example, when the temperature of the hot water circulating in the closed circuit 7 reaches about 80 ° C., the sheath type plug heater 9 is controlled to maintain this temperature. On-off is controlled.

On the upstream side of the on-off valve 4 of the introduction pipe 2,
A temperature sensor 17 for measuring the temperature of the hot water of the same part is attached,
The detection signal of the temperature sensor 17 is taken into the control unit 12. And this temperature sensor 1
The on / off valves 4 and 5 are controlled by the detection signal of 7. When this temperature reaches a predetermined value or more, the on / off valves 4 and 5 are opened to end the heating by the sheathed plug heater 9. ing. Incidentally, the on-off valves 4 and 5 are closed when the engine stops, and cannot be opened only by operating the engine. The condition for opening is that the temperature of the temperature sensor 17 reaches a certain temperature or more. Further, the on-off valves 4 and 5 are forcibly opened by, for example, a switch operation or the like so that a normal heat cycle can be returned.

The operation and the like of the indoor heating device configured as described above will be described. When the engine stops and cools down, the on-off valves 4 and 5 are closed, and a local closing circuit 7 is formed around the heater core 1.

Here, when the car is stopped at a position close to the home power supply, the outlet 14 is plugged into the power supply several minutes before the engine is started, and when the car is far from the home power supply, the engine is started. 15 minutes before the plug outlet
Into the cigarette heater plug or the like and operate the key to the engine start preparation position or the like.

Then, heating of the water in the catch tank 8 is started by the sheathed plug heater 9, and the pump 10 is operated to circulate the water. When the water is warmed to around 80 ° C., the temperature is controlled to be constant by the detection of the temperature sensor 16. At this time, it is convenient to provide an indicator or the like that can confirm that the sheathed plug heater 9 is operating.

When the occupant gets into the vehicle, the temperature of the hot water in the closed circuit 7 has already risen, and a hot air can be blown out by heating the interior of the vehicle. Therefore, when the occupant enters the vehicle, starts the engine, and performs the heating operation inside the vehicle, the warm air is immediately blown out and a heating effect can be obtained.

Then, the engine is warmed up and the closed circuit 7 is turned on.
When the temperature of the hot water in the water pipe 2 on the engine side reaches a predetermined temperature, the temperature sensor 17 detects the temperature, and the on-off valves 4 and 5 are automatically opened to return to a normal heat cycle. With such a device, warm air can be blown out at the same time as the engine is started without performing warm-up operation, and a comfortable indoor space can be created.

FIG. 2 shows a configuration example in which the caster 8 and the sheathed plug heater 9 are attached to the introduction pipe 2, and FIG. 3 shows the caster 8 and the sheathed plug heater 9 provided adjacent to the heater core 1. However, in any case, the same effects as in the above example can be obtained. However, FIG.
In the case of the configuration example, since the pump 10, the catch tank 8, the sheathed plug heater 9, and the like can be collectively provided in the bypass pipe 6, there is little significant change in the design of the air-conditioning system of an existing vehicle or the like. There is an advantage.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the heating means may be heated by a method other than the sheath type plug heater 9, and the catch tank 8 is not an essential requirement.

[0025]

As described above, in the vehicle interior heating apparatus according to the present invention, the inlet pipe and the outlet pipe near the heater core are connected by the bypass pipe, and the engine side of the bypass pipe is located on the engine side. Opening and closing valves are respectively provided on the inlet pipe and the outlet pipe so that a local closed circuit is formed from the bypass pipe to the heater core, and water in the closed circuit is heated by heating means provided in the closed circuit. Since this heating means can be driven by either a household power supply or a vehicle battery power supply, it is possible to create a condition for blowing hot air without performing a warm-up operation, and the user can get on the vehicle. You can get a feeling of heating from the point. Further, if a circulating means for circulating the water in the closed circuit is provided in the closed circuit, the water in the closed circuit can be efficiently heated.

If the temperature of the water in the closed circuit is controlled to a constant temperature, the temperature of the hot air to be blown out is controlled to be constant, and the heating means is heated. Even when the power source is a vehicle battery power source,
Do not waste power. When the temperature of the hot water sent from the engine rises to a predetermined temperature or higher, the on-off valves of the inlet pipe and the outlet pipe are automatically opened, so that hot air can be continuously extracted. It is comfortable.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first configuration example of an indoor heating device according to the present invention.

FIG. 2 is a diagram showing a second configuration example of the indoor heating device according to the present invention;

FIG. 3 is a diagram showing a third configuration example of the indoor heating device according to the present invention.

FIG. 4 is a configuration example diagram of a conventional indoor heating device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heater core, 2 ... Inlet pipe, 3 ... Outlet pipe, 4 ... On-off valve, 5 ... On-off valve, 6 ... Bypass pipe, 7 ... Closed circuit, 9 ...
Sheath type plug heater, 10: pump, 12: control unit, 16: temperature sensor, 17: temperature sensor.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takeaki Gaari 1907, Hirata-cho, Suzuka-shi, Mie Honda Motor Co., Ltd. (72) Inventor Akiyoshi Shimizu 1907, Hirata-cho, Suzuka-shi, Mie Honda Motor Co., Ltd.

Claims (4)

[Claims] 1. A hot water sent from an engine is sent to a heater core through a water guide pipe by an operation of a control unit, and heat of the hot water is transferred to the air by the heater core. Indoor heating device for blowing out the air into the room,
A bypass pipe connects the inlet pipe and the outlet pipe near the heater core, and an on-off valve is provided on each of the inlet pipe and the outlet pipe on the engine side from the bypass pipe to form a local closed circuit from the bypass pipe to the heater core. Heating means for increasing the temperature of water in the circuit to a predetermined temperature in the closed circuit, and the heating means can be driven by either a household power supply or a vehicle battery power supply. An indoor heating device for a vehicle, comprising: 2. The vehicle interior heating device according to claim 1, further comprising a circulating means for circulating water inside the closed circuit, wherein the circulating means is provided with either a household power supply or a vehicle battery power supply. An indoor heating device for a vehicle, which can be driven by one power supply. 3. The indoor heating apparatus for a vehicle according to claim 1, wherein the temperature of the water in the closed circuit is controlled to a constant temperature after the temperature rises to a constant value. Vehicle heating system. 4. The indoor heating apparatus for a vehicle according to claim 1, wherein the on-off valves of the inlet pipe and the outlet pipe are configured such that when hot water discharged from the engine rises above a predetermined temperature. An interior heating device for a vehicle, which is controlled to open automatically.