JPH04244412A - Heater for vehicle - Google Patents

Abstract

PURPOSE:To prevent the temperature of the blown out air from a heater from lowering and not to take the uncomfortable smell in the engine room in the car room by directly taking the air passing through a radiator in the inside and outside air duct connected to a heater unit. CONSTITUTION:An inside and outside air duct 23 connected to a heater body 17 and provided with an inside and outside air intake port 27 is arranged to pass the rear section of a radiator 24, and an opening 25 is provided to the inside and outside air duct 23 at the rear section of the radiator 24 to intake the warm air passes through the radiator 24 and is provided with a damper 26.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater device for a vehicle that takes warm air that has passed through a radiator into an internal/external air duct to raise the temperature of the heater blowing out of the vehicle interior.

0002

2. Description of the Related Art Automobiles are equipped with heater devices for warming the interior of the vehicle. This heater device normally guides engine cooling water to a heater core (heater heat exchanger) as a heat source, and heats the air inside the vehicle interior or the air outside the vehicle interior (outside air) by passing it through the heater core with a blower. It is something.

[0003] This type of heating system is also used in one-box cars in which the engine space, living space, and trunk are integrated, and in two-box cars in which the living space and trunk space are integrated. There is. FIG. 4 schematically shows the cooling device 2 in the one-box car 1. As shown in the figure, the engine 4 to which one end of the cooling water pipe 3 of the cooling system 2 is connected is mounted in the lower part of the luggage compartment behind the driver's seat 5, and the engine 4 to which the other end of the cooling water pipe 3 is connected A radiator 6 is attached to the lower part of the driver's cab 5.

[0004] Furthermore, a heater core (not shown) of the heater device connected to the cooling water pipe 3 is provided within the instrument panel 7. This results in a considerable distance between the engine 4 and the heater core. Heater unit containing this heater core (not shown)
Inside and outside air ducts (not shown) take in inside and outside air.
is connected, and the inside and outside air taken in by a blower (not shown) from this inside and outside air duct is sent into the vehicle interior through heat exchange through the heater core. In the figure, 8 indicates a dash panel, and 9 indicates a transmission.

However, the above-mentioned one-box car has a larger interior volume than a two-box car, etc.
Due to the distance between the engine and the heater core, the temperature of the cooling water drops by the time it reaches the heater core from the engine, causing the problem that the temperature at which the heater blows into the passenger compartment cannot rise sufficiently. . For this reason, even if you try to make the heater core and heater unit larger in order to improve the performance of the heater, the dash panel of a one-box car is located near the feet, so the space inside the instrument panel cannot be enlarged, and in the end, it is impossible to improve the performance of the heater. It was impossible.

[0006] Therefore, in extremely cold regions, when the temperature of the outside air taken in from the inside and outside air intakes of the duct is low and the temperature at which the heater blows out cannot rise sufficiently, the heat generated by the engine is used to warm the outside air, which is then passed through the heater core. There is a heating device which raises the temperature of the air by sending air into the vehicle interior (Japanese Utility Model Publication No. 58-113511).

As shown in FIG. 5, this publication discloses that an intake duct 11 is provided along an engine block 10, and one end of the intake duct 11 is opened in front of the engine block 10. Option to connect the end to an internal/external air duct 15 connected to a heater body 14 having a fan 12 and a heater core 13, and to select external air warmed by the engine block 10, internal air A, and direct external air B to this connected part. A door 16 is provided.

[0008] When using this heating device in extremely cold regions,
When the selection door 18 is operated and outside air is taken in from the opening of the intake duct 11 in front of the engine block 10, the outside air is warmed by the heat generated by the engine block 10 while passing through the intake duct 11, and is further heated by the heater body 1.
It is heated by the heater core 13 of No. 4. This causes the temperature of the air inside the vehicle to rise.

[0009]

[Problems to be Solved by the Invention] However, although the above-mentioned system that uses the heat generated by the engine to warm the outside air is suitable for automobiles other than one-box cars, it is not suitable for one-box cars themselves. That is, it is actually impossible to send warm air from the engine room to the inside of the instrument panel, that is, to the heater unit while maintaining its temperature, and there is a problem that the performance of the heater is poor. Furthermore, when outside air is introduced into the engine compartment through the opening in front of the engine, there is a risk that the unpleasant odor from inside the engine compartment will be included in the air blown into the passenger compartment.

The present invention has been made in view of the above-mentioned conventional problems, and avoids a drop in the temperature at which the heater blows out by directly introducing air that has passed through the radiator into the internal and external air ducts connected to the heater unit. To provide a heater device for a vehicle that can reduce the temperature of the engine while at the same time not introducing unpleasant odors into an engine compartment.

[0011]

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention provides an arrangement in which an internal/external air duct connected to the heater main body and provided with internal/external air intakes passes through the rear part of the radiator. The invention is characterized in that the internal/external air duct at the rear of the radiator is provided with an opening for taking in the warm air that has passed through the radiator, and a damper is provided in the opening.

0012

[Function] In this way, the internal and external air ducts with internal and external air intakes are arranged to pass through the rear part of the radiator, and an opening is provided in the rear part of the duct. Only the warm air that has passed through will be taken in. If the warm air that has entered this opening is passed through the heater body, the temperature of this air will be further increased by the heater body.

Furthermore, when the intake of warm air is no longer required, the intake of warm air from the radiator can be stopped by closing the damper provided at the opening, and the outside air can be taken in from the normal outside air intake. It becomes possible to incorporate Additionally, since the opening only takes in air that has passed through the radiator, unpleasant odors from the engine room are not included.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In FIG. 1, reference numeral 17 denotes a heater body consisting of a heater unit 19 having a heater core 18 therein, and a blower case 21 having a blower 20 therein. An internal/external air duct 23 with an evaporator 22 interposed therein is connected to the heater main body 17 . The base end of the internal and external air duct 23, that is, the internal and external air duct 23 located between the heater main body 17 and the evaporator 22 is connected to the radiator 2.
An opening 25 is formed in the lower part of the internal/external air duct 23 at the rear of the radiator 24 to take in the warm air that has passed through the radiator 24. There is.

A damper 26 is attached to the opening 25 for opening or closing the opening 25. Further, an inside/outside air intake 27 is formed at the tip of the inside/outside air duct 23 to take inside air A and outside air B, and a damper 28 for switching between inside and outside air is attached to the outside air intake 27. . In addition, in FIG. 1, the symbol C indicates the radiator 2.
In FIG. 2, the warm outside air passing through the heater body 17 is an opening formed in the heater body 17 leading to the interior of the vehicle, and in FIG. 3, the symbol 30 is a radiator fan.

With the above structure, when the heater is used in the one-box car 1, the blower 20 of the heater device is operated and the internal and external air duct 23, which is disposed to pass through the rear part of the radiator 24, is activated. Opening 25
If the damper 26 provided in the engine compartment is operated to allow air to be taken in, warm air that has passed only through the radiator 24 in the engine room will be taken in from the opening 25. If the warm air taken into this opening 25 is passed through the heater core 18 in the heater body 17 by the blower 20, the temperature of the air is further increased by the heater core 18. This can prevent a drop in the blowout temperature of the heater.

Furthermore, when it is no longer necessary to take in this warm air, by closing the damper 26 provided in the opening 25, only the air from the inside and outside air intake port 27 formed at the tip of the inside and outside air duct 23 will be drawn in. That is, only the inside air A and the direct outside air B can be taken into the heater main body 17. Therefore, when the heater device is not in use, the warm air that has passed through the radiator 24 is not taken into the heater body 17.

[0018]

[Effects of the Invention] As explained above, the present invention has an internal/external air duct provided with internal/external air intakes arranged to pass through the rear part of the radiator, and an opening provided in the rear part of the duct. , only the warm air that has passed through the radiator will be taken into this opening. If the warm air that has entered this opening is passed through the heater body, the temperature of this air will be further increased by the heater body. by this,
It is possible to prevent a drop in the blowout temperature, improve the performance of the heater, and improve the performance of the defroster.

Furthermore, when this intake of warm air is no longer required, the intake of warm air from the radiator can be stopped by closing the damper provided at the opening, and the outside air can be taken in from the normal outside air intake. It becomes possible to incorporate Therefore, there is no need to significantly improve conventional ducts, and cost increases can be suppressed. In addition, since the opening only takes in air that has passed through the radiator, the air taken in does not contain any odor from the engine room, so you do not feel uncomfortable.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing an embodiment of the present invention.

FIG. 2 is a view taken along the X arrow in FIG. 1;

FIG. 3 is a view taken along the Y arrow in FIG. 2;

FIG. 4 is a schematic diagram of a one-box car.

FIG. 5 is a schematic diagram of a conventional heater device.

[Explanation of symbols]

17 Heater body 23　Internal/external air duct 24 Radiator 25 Opening 26 Damper 27 Interior and exterior air intakes

Claims (1)

[Claims] 1. An internal/external air duct connected to a heater main body and provided with an internal/external air intake port is disposed so as to pass through a rear portion of the radiator, and the radiator is connected to the internal/external air duct in the rear portion of the radiator. A heater device for a vehicle, characterized in that an opening is provided to take in the warm air that has passed therethrough, and a damper is provided in the opening.