JPS61218416A - Heater device for automobile - Google Patents

Abstract

PURPOSE:To enable the passenger's compartment to be rapidly heated, by provid ing a bypass having an opening and closing member and its branching point, to an engine exhaust gas passage, and by fitting the heat-radiating end of a heat pipe having its heated and fitted in the bypass, in an air flow passage for air-condition in the passenger's compartment. CONSTITUTION:An air-conditioning device 3 for the passenger's compartment is installed in an automobile, and is provided with a ventilating duct 4 having one end opening part 4a opened to the passenger's compartment. A heat radiator 5 is disposed in the ventilating duct 4 and is connected with an engine cooling water pipe 6. Further, a blower fan 7 is disposed in the ventilating duct 4, and blast air is heated by the radiator 5, and is blown into the passenger's compartment through the opening part 4a. In the above-mentioned arrangement, a bypass 8 is branched off from the intermediate section of an exhaust pipe 2 connected to an engine 1, and a shut-off valve 9 is disposed at the branching point thereof. Further a heat pipe 10 is provided with its heated end 10a being fitted in the bypass 8 and its radiating end 10b being fitted in the ventilating duct 4.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a heating device for a vehicle.

[Conventional technology]

In general, heating systems for automobiles use the heat of hot water, which is heated by completely cooling the engine, as a heat source. In other words, the engine coolant is circulated by a pump attached to all the engines, and a portion of the coolant that rises in temperature due to cooling and goes to the radiator for heat dissipation is supplied to the radiator placed in the duct for ventilation inside the vehicle. This warms the air and heats the inside of the car. The temperature of the cooling water supplied to this radiator is approximately 80° C. after the temperature rises and becomes stable.

[Problem that the invention seeks to solve]

However, in such conventional automobile heating systems, the temperature of the cooling water is low for several minutes after the engine starts, so the interior temperature does not rise, leaving the driver feeling cold while driving. If the windshield is frozen or fogged up, the defroster does not work well, resulting in poor visibility.

For example, as disclosed in Japanese Utility Model Publication No. 47-24834, it has been proposed to supply electricity to a heating element from an onboard battery to heat the vehicle, but the heating capacity is insufficient due to the limited capacity of the battery. If you try to secure the capacity by installing a large hole IJ f, it will be economical 1
It was not a good idea in terms of weight etc.

The present invention was developed in view of the above points, and an object of the present invention is to provide a heating system for a vehicle that can completely start heating at the same time as starting the engine.

[Means for solving problems]

In order to achieve all of the above objectives, in the present invention, a bypass having an opening/closing member at the branch point is provided branching off from the exhaust gas passage of the entire engine, and a heat vibrator with a heating end inserted in a part of this bypass is provided. The heat dissipation end was inserted into the air flow passage for air conditioning in the passenger compartment.

[Effect]

When you start the engine, high-temperature exhaust gas flows through the passage from the beginning, so when you switch the opening/closing member to the full bypass side, this high-temperature gas flows to the bypass and heats the heat pipe to zero, so this heat is conducted by the heat vibrator. Then, the air in the airflow passage facing the heat dissipation end is warmed, and the vehicle interior is rapidly heated.

〔Example〕

FIG. 1 is a schematic configuration diagram showing an embodiment of an automobile heating device according to the present invention, in which an automobile engine 1 has an exhaust pipe 2.
is connected, and the other end is open below the vehicle body. On the other hand, this automobile is equipped with an existing air conditioner for the vehicle interior indicated by the overall sound code 3, and this air conditioner is completely equipped with a ventilation duct 4 having an opening at one end Jaf opened into the vehicle interior.

A radiator 5 is disposed inside this ventilation duct 4,
This radiator 5 is connected to a piping 6 for engine cooling water, which is circulated by a pump shown in the figure. The coolant whose temperature has been raised by cooling the engine is radiated by the radiator, and is led to the radiator 5 through the piping 6 to radiate the heat, and then is returned to the pump. Reference numeral 7 denotes a fan that blows air into the ventilation duct 4, and this air is warmed by the heat radiated by the radiator 5 and blown into the vehicle interior through the opening 4a:2>, thereby heating the vehicle interior. It is composed of

A bypass 8 is branched in the middle of the exhaust pipe 2, and a valve 9 that can be opened and closed is provided at the branching point as an opening/closing member for switching the entire exhaust pipe 2 between the main pipe side and the bypass 8 side. There is. 10 is a conventionally known heat vibrator filled with a heat medium in a pipe, and its heating end 10a'i is inserted into the bypass 8, and the heat radiation end 10bk is connected to the ventilation duct 4.
It has been interned within. The heat of the heat pipe 10, which is heated by the exhaust gas heat in the bypass 8, is conducted by the heat medium and moves from the heating end 10a to the heat radiation end 10b, where the heat is radiated. It is designed to warm the.

The operation of the heating system configured as described above will be explained.Generally, when engine fuel is combusted, 1/3 of the generated thermal energy is used for power;
/3 is radiated from the radiator through the cooling water, ]/
3 is discharged from the exhaust pipe 2 together with the exhaust gas. The temperature of the exhaust gas in the exhaust pipe 2 increases from the beginning with the start of the engine 1, and the amount of heat increases. Therefore, when the valve 9 is switched to open to the bypass 8 side and the fan 1 is rotated, the engine 1 is started.
Wind passes through the entire ventilation duct and is blown into the room from the opening 4a, and exhaust gas from the engine 1 flows from the exhaust pipe 2 to the bypass 8, so the heating end 10a of the heat vibrator 10
is heated by this exhaust gas. This heat is heat pipe 1
The heating end 10a2h is conducted by the heat medium in 0 and the heat radiation end 1
0b and radiates heat, the air sent by the fan T and slightly warmed by the radiator 5 is heated, and this warm air is blown into the vehicle interior through the opening 4a to heat the vehicle interior. In this way, by utilizing the exhaust gas from the engine 1, warm air is supplied into the vehicle interior at the same time as the engine 1 is started, so that the interior of the vehicle is rapidly heated. In addition,
When engine 1 warms up and the temperature of the cooling water increases,
Heating using the conventional radiator 5 has the advantage of being able to supply more uniform heat and is easier to control, so heating using exhaust gas is used during initial rapid heating or when the outside temperature is extremely low. Use only to improve your abilities,
In other cases, it is desirable to switch the valve 9 to the main pipe side and use the radiator 5 for heating. Note that the valve 9 may be opened and closed by fully manually operating a lever in the vehicle interior connected to the valve 9 by a wire, or may be moved by a motor or vacuum pressure. In addition, there are heat vibrators 10 that operate at various temperatures, but in the case of this device, a heat medium that is fake and does not freeze at around -30°C is used, and the temperature is raised to around 300°C at the heating end 10a. That's good.

FIG. 2 is a schematic configuration diagram of a heating device according to another embodiment of the present invention, which corresponds to FIG. VCii outside the duct 4, temperature sensor 1
A controller 12 is provided which is fully electrically connected between the valve 9 and the valve 9 . The rest is the same as the embodiment shown in FIG.

Due to this configuration, the temperature sensor 11
detects the entire temperature of the air in the ventilation duct 4, and uses the signal to open and close the valve 9 via the controller 12. That is, when the engine 1 starts, the coolant temperature is low and the temperature sensor 1
Since the detected temperature of 1 is low, the detection signal causes the controller 12 to switch the valve 9 to open to the bypass 8 (lllll), and the exhaust gas warms the wind through the heat pipe 10.The temperature of the engine cooling water increases and When this happens, heat is also released from the radiator 5, which may cause the temperature of the hot air to rise too much.At this time, the temperature sensor 11 detects the high temperature and issues a signal, and the controller 12 closes the valve 9. Since it is opened half way or opened to the main pipe side, the amount of exhaust gas passing through the bypass 8 side is reduced or cut off.Furthermore, when the outside air is low and the cooling water temperature of the engine 1 alone is insufficient, the temperature sensor 11 detects the Comfortable heating is achieved by switching the valve 9 so as to open all the way to the bypass 8 side, so that the exhaust gas passes through the bypass 8 side, and is heated by both the radiator 5 and the heat pipe 10.

In this embodiment, the valve 9 is shown as an opening/closing member provided at the branch point between the main pipe of the exhaust pipe 2 and the bypass 8, but a shutter may also be used.

〔Effect of the invention〕

As is clear from the above description, in the automotive heating system according to the present invention, an opening/closing member is provided at a branch point.

All heat pipes are provided with a bypass branched from the exhaust passage of all engines, and the heating end is inserted into a part of this bypass, and the heat dissipation end is inserted into the airflow passage for cabin air conditioning. Therefore, when the engine is started after the opening/closing member is completely opened to the bypass side, the exhaust gas flows through the bypass almost immediately after starting and warms the air in the air flow passage through the heat pipe, so the interior of the vehicle is rapidly heated. It is heated so passengers don't feel cold, and
Even if the windows freeze, the warm air quickly thaws them, allowing safe and comfortable driving.

[Brief Description of the Drawings] Fig. 1 and Fig. 2 show an embodiment of a heating device for an automobile according to the present invention, Fig. 1 is a schematic configuration diagram thereof, and Fig. 2 shows another embodiment of the present invention. FIG. 2 is a schematic configuration diagram corresponding to FIG. 1; 1... Engine, 2... Exhaust pipe, 3... Cabin air conditioner, 4... Fist ventilation duct, 4a...
Opening, 6... Heatsink, 7-... e-fan, 8...
... Bypass, 9 ... Valve, 10 ... Heat pipe valve, 10a ... Katouchi hot end, 10b ...
・Heat dissipation end.

Claims (1)

[Claims] A bypass having an opening/closing member at the branch point is provided in the engine exhaust gas passage, a heat pipe with a heating end inserted in a part of this bypass is provided, and its heat radiation end is inserted into the airflow passage for air conditioning in the passenger compartment. An automotive heating device characterized by: