JPH0134888Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a hot air generation device for an automobile, and particularly to a hot air generation device for an automobile that can use hot air for various purposes.

(Prior art) A hot air generator for an automobile that sucks up the heat of exhaust gas from an automobile engine through a heat receiving section of a heat pipe, and releases the sucked up heat through a heat radiating section of a heat pipe in a hot air generator. is publicly known (Japanese Unexamined Patent Publication No. 1988-1998).

(Problem that the invention aims to solve) By the way, the warm air produced by the hot air generator of this type of hot air generator for automobiles has conventionally been used only for heating the interior of the vehicle, and especially for high-temperature exhaust gas. The reality is that the high-temperature warm air obtained by hot air generators using heat pipes that directly absorb heat from the air is not fully utilized.

Therefore, an object of the present invention is to provide a hot air generator for an automobile that can effectively utilize the hot air obtained not only for heating but also for other purposes.

(Means for Solving the Problems) A hot air generator for an automobile according to the present invention includes a hot air generator, a heating duct extending into the vehicle interior, and a defrosting hot air supply duct extending to the lower side of the windshield. It is characterized in that it is connected to a carburetor warm-up duct connected to the carburetor.

(Function) Due to the above-mentioned features of the present invention, the high-temperature warm air obtained by the hot air generator using a heat pipe is sent to the lower side of the windshield and blown against the windshield and wiper blades. It is used to thaw gasoline in the carburetor, and is also sent to the carburetor to warm it, helping to vaporize gasoline in the carburetor during extremely cold weather, making it easier to start the engine.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes, for example, a four-cylinder internal combustion engine mounted on an automobile 2,
A heat receiving part of a hot air generator 4 is assembled to a connection part of the internal combustion engine 1 with the muffler 3.

As shown in FIG. 3, the hot air generator 4 includes a fixed plate 5 interposed between the exhaust section 1a of the internal combustion engine 1 and a muffler mounting plate 3a attached to the exhaust section 1a. For example, four through holes 5a corresponding to the exhaust holes of the exhaust section 1a are provided in the fixed plate 5, and each heat receiving section 6a of the four heat pipes 6 is located in each through hole 5a. are doing.

A large number of fins 7 common to the four heat pipes 6 are attached to the heat radiation section 6b of each heat pipe 6, and a fan 8 is installed on the back side of the fins 7. Each of the heat pipes 6 is
The heat receiving part 6a absorbs the heat of the exhaust gas passing through the through hole 5a of the fixed plate 5, and releases the absorbed heat to the heat radiating part 6b, thereby exchanging heat with the air sent from the fan 8. It is designed to generate warm air.

As shown in FIGS. 1 and 2, the hot air from the hot air generator 4 is guided to the indoor outlet 10 via the first duct 9, and from the indoor outlet 10 to the inner surface of the windshield 11. , both ends of the dart board (not shown), and the footwell of the front seat 12, and the air is distributed to the inside of the front seat 12 via the second duct 13,
The air is blown out into the interior of the rear seat 14 and at the feet of the rear seat 14.

The second duct 13 is composed of a floor duct 13a and a side sill duct 13b, which are formed with a double floor structure as shown in FIG. As shown in the figure, the second discharge port 16 of the second duct 13 opens inside the seat cushion of the front seat 12.
It opens inside the seat cushion of the rear seat 14,
Furthermore, the third outlet 17 of the second duct 13 opens at the foot of the rear seat 14. The warm air discharged from these outlets 15, 16, and 17 heats the seats and the feet of the rear seats 14, and the warm air passing through the floor duct 13a and side sill duct 13b heats the inside of the vehicle. Underfloor heating is now available.

Further, the hot air from the hot air generator 4 is supplied to the first
As shown in FIGS. 2 and 6, the air is discharged from the outer surface of the lower end of the windshield 11 through a third duct 18, and is used for defrosting the windshield 11 and the wiper blade 19. , is supplied to the carburetor 21 via the fourth duct 20 and used for warming up the carburetor 21.

Next, the effect will be explained.

When the internal combustion engine 1 is started, high-temperature exhaust gas from the beginning of startup is discharged from the exhaust section 1a, and the heat of this exhaust gas is absorbed by the heat receiving section 6a of the heat pipe 6 installed in the through hole 5a of the fixed plate 5. It will be done.

The heat absorbed by the heat receiving section 6a is released from the heat dissipating section 6b of the heat pipe 6 via the fins 7. Therefore, when the fan 8 is started, heat exchange occurs between the fan 7 and the air passing therebetween, and hot air at high temperature is discharged from the hot air generator 4. This hot air is supplied through the first duct 9 and the second duct 13 and is used for hot air heating, floor heating, and seat heating in the car, and is also supplied through the third duct 18 to the front glass 1
1 and the wiper blade 20,
Furthermore, it is supplied through the fourth duct 20 and used for warming up the carburetor 21.

In this way, heat is absorbed directly from the high-temperature exhaust gas of the internal combustion engine 1, so the maximum temperature of the heat source is approximately
It can reach temperatures of around 800 degrees Celsius, producing hot air at a higher temperature than conventional systems that use a radiator as a heat source.
That is, compared to the hot air temperature of about 70° C. in the case of the conventional method, the hot air temperature in the case of this embodiment is 120° C. or higher. For example, the hot air temperature in this example is
At 120℃, the cross-sectional area of the duct required to transfer the same amount of heat as before is 70/120≒58 (%)
This is advantageous because heating of the rear seat 14, which has been a problem in the past, can be done with a small diameter duct piping.

In addition, unlike the conventional method that uses a radiator as a heat source, waste heat, which is about 1/3 of the energy generated by the internal combustion engine 1, is recovered and used, so there is no restriction on the total amount of heat that can be used. High-temperature warm air can be obtained from the beginning of startup. Therefore, unlike the conventional type, there is no problem such as when cold air is supplied to the inside of the car when the fan 8 is started. It can also be used for acupuncture purposes.

FIG. 7 shows another embodiment of the present invention, in which a heat receiving portion 6a of a heat pipe 6 is embedded in a position near an exhaust valve 23 of a cylinder head 22 of an internal combustion engine 1.

If configured in this way, the manufacturing will be a little more complicated than in the case of the previous embodiment, but since the heat receiving part 6a of the heat pipe 6 will never come into contact with the exhaust gas,
The heat absorption efficiency does not decrease due to adhesion of carbon or the like to the outer surface of the heat receiving part 6a, and the high heat exchange efficiency inherent to the heat pipe 6 can be maintained permanently, and maintenance is easy.

[Effect of idea]

As explained above, the present invention extracts the exhaust heat of the internal combustion engine using a heat pipe to obtain hot air, so a large amount of hot air can be quickly obtained, and it can be used for heating the inside of a car. In addition to this, by connecting a hot air generator to the lower side of the windshield and the carburetor through a duct, it is possible to defrost the windshield and wiper blades in severe cold weather, and also to warm up the carburetor. It can make the engine start faster.

[Brief explanation of the drawing]

FIG. 1 is a main part configuration diagram showing an embodiment of the present invention.
Figure 2 is a similar overall configuration diagram, Figure 3 is an exploded perspective view showing the configuration around the hot air generator, Figure 4 is a right half sectional view showing the configuration of the floor duct and side sill duct, and Figure 5 is the FIG. 6 is an explanatory view showing the configuration of the discharge ports of the two ducts, FIG. 6 is a detailed view of the main part showing the configuration of the third duct, and FIG. 7 is an explanatory view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Internal combustion engine, 2...Car, 4...Hot air generator, 6...Heat pipe, 6a...Heat receiving part, 6
b...Heat radiation part, 7...Fin, 8...Fan, 9
...First duct, 10...Indoor discharge port, 11...
Windshield, 12...Front seat, 13...Second duct, 13a...Floor duct, 13b...Side sill duct, 14...Rear seat, 18...Third duct
Duct, 19...wiper blade, 20...4th
Duct, 21...carburetor, 22...cylinder head, 23...exhaust valve.

Claims (1)

[Scope of utility model registration request] A hot air generation device that includes a heat pipe having a heat receiving part that absorbs exhaust heat of an internal combustion engine and a heat radiating part that releases the heat absorbed by the heat receiving part, and blowing air to the heat radiating part of the heat pipe to obtain hot air. In the hot air generator for an automobile, the hot air generator further includes:
A hot air generator characterized in that a heating duct extending into a vehicle interior, a defrosting hot air supply duct extending to the lower side of a windshield, and a carburetor warming-up duct connected to a carburetor are connected.