JPS6319207Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heating device for a vehicle that is installed outside the vehicle and supplies warm air into the interior of the vehicle, and is intended to improve heating performance particularly in cold regions.

Fig. 1 is a diagram showing a conventional heating system for a car that is installed outside the car. Inside the case 3 of the heater unit 2 are a fan 5 driven by a motor 4 and a heater core 6 through which engine cooling water circulates.
is incorporated. Note that 7 is a mix door. Therefore, the warm air sucked in by the fan 5 from under the front seat and heated by the heater core 6 is discharged under the rear seat to heat the interior of the vehicle.

In this type of heating device that is installed outside the vehicle, the case 3 of the heater unit 2 is exposed to the outside air, so there is a large amount of heat leaking to the outside. is pasted. However, in cold regions, insulation material 8
Even if the warm air is pasted, it may not be possible to raise the temperature of the warm air even if it is passed through the heater core 6 due to the influence of the outside air.

The purpose of the present invention is to improve the heating performance of a type of heating device that can be installed outside a vehicle, especially in cold regions. The configuration of the present invention for achieving such an object includes a fan that sucks air from an air inlet provided in the case, and a fan that sucks air from an air inlet provided in the case, and a heater unit case that is attached to the lower surface of the floorboard of the vehicle. A heater core that heats the heated air and an air outlet that discharges warm air into the vehicle interior are provided, and a flow path from the air inlet to the air outlet is formed in the case, and the exhaust gas from the engine is heated through the flow path. A chamber is formed in the case adjacent to the flow path.

Next, an embodiment of the present invention shown in the drawings will be described. FIG. 2 is a cross-sectional view showing the state in which the heating device is attached to a vehicle, and the case 13 of the heater unit 12 attached to the floor plate 11 of the vehicle is made by combining two case components 13a and 13b with a U-shaped cross section. The inner case 14 and the case structure 1 incorporated therein are
3a, a flow path 15 is formed. The case structure 13a is attached to the lower surface of the floor plate 11 of the vehicle.
An air inlet 16 for feeding air from the vehicle interior into the flow path 15 is formed in the vehicle interior, and an air outlet 17 for discharging warm air into the vehicle interior is further formed.

A fan 19 driven by a motor 18 is provided inside the inner case 14, and a heater core 20 is provided to heat the air sent by the fan 19. Engine cooling water is fed into the heater core 20 through a conduit (not shown). The ratio of air passing through heater core 20 to air not passing through heater core 20 is controlled by mix door 21.

A duct 23, which has a substantially U-shaped cross section and has a heating chamber 22 formed therein, is supported between the inner case 14 and the case component 13b. This duct 23 has a muffler pipe 2
A conduit 25 connected to the heating chamber 22 is attached, and exhaust gas from the engine is supplied to the heating chamber 22 from the conduit 25 . The exhaust gas that has entered this is sent out to an exhaust pipe 28 behind the muffler 27 through a conduit 26 connected to the duct 23.
Each of the conduits 25 and 26 is formed with a bellows portion 29 for absorbing drive. In addition, 31 is the motor 18
This is a partition plate to prevent exhaust gas from entering.

Therefore, the air taken in from the air inlet 16 is heated by the heater core 20, and this heated hot air is further heated by the radiant heat from the heating chamber 22. As a result, even in a cold region, the flow path 15 is
The air inside the vehicle is no longer cooled, and suitable warm air can be supplied into the vehicle interior. Further, in the present invention, since the medium heated by the radiant heat from the heating chamber 22 is the air in the flow path 15, the heating efficiency is good.

FIG. 4 is a diagram showing another embodiment of the present invention,
By placing the pre-muffler 30 adjacent to the heater unit case 13, the inside of the pre-muffler 30 is also used as a heating chamber for heating the flow path 15 and suppressing cooling.

As described above, according to the present invention, a heater unit case installed on the underside of the floorboard of a vehicle includes a fan that sucks air from an air inlet provided in the case, and a fan that sucks air from the air inlet provided in the case, and a fan that sucks air from the air inlet provided in the case. A heater core for heating and an air outlet for discharging warm air into the vehicle interior are provided, a flow path from the air inlet to the air outlet is formed in the case, and a heating chamber through which exhaust gas from the engine flows is provided. Since it is formed adjacent to the flow path in the case, the warm air that is heated by the heater core due to the radiant heat of the engine exhaust gas and then discharged into the passenger compartment is further directly heated, especially in cold weather. It has become possible to improve heating performance in the ground.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional heating device for an automobile, FIG. 2 is a sectional view showing a heating device according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of the heating device of the present invention, and FIG. The figure is a perspective view showing another embodiment of the present invention. 11...floorboard, 12...heater unit, 13
... Case, 14 ... Inner case, 15 ... Channel, 16 ... Air inlet, 17 ... Air outlet, 2
0... Heater core, 22... Heating chamber.

Claims (1)

[Scope of utility model registration request] Inside the heater unit case, which is attached to the underside of the vehicle floorboard, there is a fan that sucks air from an air inlet provided in the case, a heater core that heats the air sent by the fan, and a heater core that heats the air sent to the vehicle interior. a flow path from the air inlet to the air outlet is formed in the case, and a heating chamber through which exhaust gas from the engine flows is provided in the case adjacent to the flow path. A heating device for an automobile, characterized in that it is formed by: