JPS5970210A - Electric heating device for car - Google Patents

Abstract

PURPOSE:To improve the feeling of heating by arranging an electric heating device with a fan and a heater matched with the capacity of a battery inside a flat casing in the lower part of an instrument panel and the like for blowing wind to the feet of a driver. CONSTITUTION:When the temperature of cooling water is low at the time of engine starting, power is supplied from a battery source by an unillustrated switch to drive a fan 3 and electrify a heater 6. Therefore, the warm wind is blown off from a blowoff port 12. This casing C is fixed in the lower part of an unillustrated instrument panel to direct the blowoff port 12 to driver's feet. This construction permits to heat the feet part partially at the time of insufficienct heating in the initial stage of operation for removing the feeling of insufficient heating.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric heating device for a vehicle that supplies warm air into a vehicle interior using an electric heater.

Generally used as a vehicle heating system is a so-called hot water heating system that supplies engine cooling water warmed by the engine to a heat exchanger such as a heater core, heats the introduced air, and supplies the heated air into the vehicle interior. However, when the engine starts, the temperature of the engine cooling water has not risen sufficiently, so warm air cannot be obtained.

Therefore, there is an electric heating system that installs an electric vent in the main duct and supplies power from a battery so that warm air can be obtained even when the engine is started, but the battery capacity is limited and the main duct The capacity of the blower is generally large and cannot supply sufficient power to the electric heater, resulting in a lack of heating sensation.

By the way, you can get a certain feeling of warmth just by warming your feet locally. Therefore, in the present invention, a compact electric heating device consisting of a low-capacity blower and an electric beater commensurate with the battery capacity is installed at the bottom of the instrument panel or on the floor near the driver's feet. By blowing hot air directly, the system attempts to perform preliminary heating until the engine cooling water is sufficiently warmed.

That is, in the heating device of the present invention, an air outlet is provided in a flat casing, and an electric heater having a large number of ventilation holes is provided in the nursing room facing the air outlet.
An air inlet is formed at the end of the casing and a blower is installed therein, and the casing is installed so that the air outlet faces the driver's feet.

Hereinafter, the present invention will be installed according to the illustrated embodiment. ◇Figure 1 shows the entire heating device, including a flat heat-resistant resin casing, a rectangular portion 1 (hereinafter simply referred to as the casing), and a circular portion. 2 (hereinafter referred to as the blower casing).

A sill rough type blower 3 is housed in the blower casing 2, and the blower 3 is rotationally driven by a motor 4 attached to the blower casing 2. A circular air intake port 21 is provided on one side of the blower casing 2.

An air outlet 11 is provided at the connection between the two casings 1.2, and air (white arrow in the figure) sucked in through the inlet 21 is sent into the casing 1 from the air outlet 11 by the blower 3. (dashed line arrow in the figure). Housing 1
Air outlets 12 are provided at both ends of the side wall, respectively, facing in the same direction as the inlet 21, and an air outlet grill 5 is attached to the air outlet end of each air outlet 12 to regulate the blowing direction of hot air. A heater 6 is provided on the upstream side in contact with each outlet grill 5.

The heater 6 has a rectangular heating element 61 as shown in FIG.
The upper and lower edges of the heating element 61 are sandwiched between electrodes 6j2a and 62b, and the heating element 61 is made of POT ceramic having a honeycomb structure in which a large number of air circulation holes are formed. Furthermore, silver paste is coated over the entire downstream end surface 61a and upstream end surface 61b of the heating element 61.

The ends of the electrodes 6g & 62b are bent into a cross-shaped shape.
The downstream bent portion of the positive electrode 62a is brought into contact with the downstream end surface 61& of the heating element 61, and the upstream bent portion of the negative electrode 62b is brought into contact with the upstream end surface 61b of the heating element 61.

Between the upstream bent portion of the positive electrode 62a and the upstream end surface 6113 of the heating element 61, and between the downstream bent portion of the negative electrode ag'b and the downstream end surface 61& of the heating element 61. An insulating plate 8 is inserted. Also, gaps are formed between the upper and lower end surfaces of the heating element 61 and the electrodes 62 & 621.

One end of a lead wire 7 connected to a battery (not shown) is caulked and fixed to each of the electrodes 62a, 6B'b, and the current supplied from the battery is passed through the downstream end face 61& of the heating element 61 which is electrically connected to the positive electrode 62&. More negative electrode 62b
It flows to the upstream end face 6113 that is electrically connected to the heating element 61, and the heating element 61 generates resistance heat. As a result, the air sent by the blower 3 (dashed line arrow in FIG. 1) is heated while flowing through the through hole of the heating element 61, and is blown out as warm air (hatched arrow in FIG. 1).

FIG. 3 shows a state in which the heating device is attached to the instrument panel B below the steering shirt Hi. The other side wall of the heating device, which is opposite to the wall forming the air outlet of Kennising O, is fixed to the engine in an appropriate manner, and the air outlet 12 is directed toward the driver's feet. 〇When starting the engine, make sure that there is sufficient engine cooling water. If the air is not warmed, turn on a switch (not shown) to supply battery power to the blower motor 4 and heater 6 of the heating device, and warm air will immediately blow out from the air outlet 12 of the heating device (Fig. middle arrow). This warm air is blown directly onto the driver's feet, providing a sufficient sense of heating.

Since this heating device has a flat casing O, the steering shaft does not protrude under the driver's feet.
It can be installed in a narrow space below.

Also, since it locally warms the driver's feet,
The capacity of the blower motor 4 and the heater 6 may be small, and it will not be a burden on the battery when the engine is running.

Although the inlet and outlet of the heating device do not necessarily have to be in the same direction as in the above embodiment, heating efficiency is better if ambient air warmed by warm air is sucked in.

Of course, the blower may be an axial type, but from the viewpoint of noise and space 7 actors, it is better to use a sirocco type as in the above embodiment.

Further, the casing of the heating device may be integrally molded with the instrument panel.

As described above, in the heating device of the present invention, the flat casing is provided with an air outlet and an air inlet, and an electric heater and a blower are also provided in the casing, so that the air outlet is connected to the driver. Since it is attached to the bottom of the instrument panel so as to face the feet, it can provide a sufficient feeling of heating to the driver until the engine cooling water warms up when the engine is started, and it consumes almost no battery.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the heating device of the present invention, and FIG.
FIG. 3 is a perspective view of the electric heater, and FIG. 3 is a diagram showing the heating device attached to the lower part of the instrument panel. O... Casing... Rectangular part 12 of the casing... Air outlet 2... Circular part 21 of the casing... Air intake port 3 ...Blower 6...'Electric heater B...Instrument spring μFigure 2

Claims (1)

[Claims] An air outlet is provided on one of the closely opposing side walls of the flat casing, and an electric heater having a large number of ventilation holes is provided in the casing opposite to the air outlet,
An air intake port is formed at the end of the casing, and a blower is installed inside the casing. An electric heating system for vehicles that is fixed to a panel or floor near the footwells.