JPH0345417A - Heating system for automobile - Google Patents

Abstract

PURPOSE:To quickly heat up a cabin just after an engine is started by providing the evaporating section of a heat pipe so as to be adjacent to the exhaust pipe of the engine, concurrently providing the condensating section of the pipe so as to be adjacent to a duct, and thereby heating air in the duct by making use of exhaust heat. CONSTITUTION:In an air conditioner 3, a duct 9 is provided with an intake air switch-over damper 6 which interchangeably opens/closes an outside air inlet port 4 and an inside air inlet port 5, a blower 7 and a heater core 8 respectively, and the blow-off port 10 of the duct 9 is concurrently opened to a cabin 1. In this case, an end section which is turned out to be the evaporating section 14 of a heat pipe 13 is winded onto the exhaust pipe 12 of an engine 11. In addition, an end section which is turned out to be the condensating section 15 of the heat pipe 13 is inserted into the downstream side of the heater core 8 for the duct 9. In this constitution, exhaust heat is transferred from the evaporating section 14 of the heat pipe 13 to the condensating section 15 of it while air within the duct 9 is being heated up so that air at high temperature is blown off into the cabin 1 out of the blow-off port 10 for heating the cabin up.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a heating device for a vehicle that can heat the interior of a vehicle immediately after the engine starts. [Prior Art] When driving a vehicle in cold weather Since the temperature inside the vehicle is about the same as the outside air, it is necessary to heat the vehicle interior immediately after starting the engine.

However, today's automatic air conditioners that are only used for heating or for both heating and cooling.

Engine cooling water is generally used as a heat source to warm the air, so when you start a cold engine, it takes a long time until the cooling water reaches a temperature sufficient to warm the air.
D. It takes a long time, and therefore it takes an even longer time to warm up the interior of the vehicle. Therefore, if you start the engine and get in the car when it is cold, you will have to endure the cold until the room temperature reaches a comfortable temperature, and if you get in the car after the room temperature has reached a comfortable temperature, fuel consumption will increase.

[Problem to be solved by the invention]

According to the present invention, when the engine is started in cold weather, the temperature inside the vehicle is 15%.
! This solves the problem that it takes a long time for the engine to start. The purpose of the present invention is to provide a heating device for a vehicle that can start heating immediately and heat the interior of a vehicle in a short time.

[Means to solve the problem]

The present invention has a blower and has an air outlet opening into the vehicle compartment. In order to solve the above-mentioned problem, we installed a duct, attached the evaporation part of the heat pipe (attached to the exhaust pipe), and placed the condensation part in the first place.

[For production]

When the engine stutters, the exhaust heat heats up the exhaust pipe, and that heat evaporates the working fluid in the heat pipe. On the other hand, when the blower is driven to send outside air or inside air into the passenger compartment through the duct, the working fluid is condensed and the air is heated to heat the passenger compartment.

〔Example〕

The present invention will be described in detail with reference to the drawings.

The drawing shows an example in which the present invention is implemented in a car equipped with an air conditioner exclusively for heating.
3 is a seat, and 3 is an air y4 device installed in the engine room. heater core 8
is installed in the duct 9, which is a well-known configuration.

The air outlet lO opens into the vehicle compartment 1.

An end portion of a heat pipe 13 that becomes an evaporation portion 14, that is, a portion where the working fluid evaporates by absorbing surrounding heat, is attached to the exhaust pipe U of the engine 11 in a wound manner. Further, on the downstream side of the heater core 8 of the duct 9, an end portion of the heat pipe 13 that becomes a condensing portion 15, that is, a portion where heat is released to the surroundings and the working fluid is condensed, is inserted and arranged.

When the engine 11 starts and completely explodes, the exhaust pipe U is immediately heated to a high temperature by exhaust heat, and the working fluid in the heat pipe I3 evaporates due to this heat lζ. on the other hand.

When the blower 7 is driven to send outside air or inside air through the duct 9 to the vehicle compartment 1, the working fluid 2 is cooled by the air inside the duct 9.
aa+. That is, exhaust heat is transported from the evaporator L4 to the condenser 151 to warm the air, and heating is performed by blowing out the heated air into the passenger compartment.

In this example, an air conditioner exclusively for heating was used, but an air conditioner with an FIK function such as a heating/cooling switching type or a fully automatic type may also be used, or an air conditioner with a heat pipe instead of a heater core may be used. There may be.

Note that a large number of small-diameter tube-shaped heat pipes or an appropriate number of thin plate-shaped heat pipes can be used. Furthermore, it is also possible to use a recently developed loop-type heat pipe in which the working fluid moves in one direction and circulates in response to the temperature difference due to the pulse vibration of the working fluid generated in the evaporation section and the breathing effect due to the pressure difference. Use one with an appropriate shape depending on the conditions of the installation location.

〔Effect of the invention〕

According to the present invention, engine exhaust heat is absorbed by the evaporation part of the heat pipe and released into the air blown into the passenger compartment, so the heat transport function of the heat pipe is used without using power or mechanically moving parts. With this simple configuration, the vehicle interior can be heated immediately after the engine is started, and the vehicle interior can be heated in a short time even in cold weather.

[Brief explanation of drawings]

The drawings are layout diagrams showing embodiments of the present invention. 1... Vehicle interior, 7-... Blower,
9...Duct, lO...Blowout outlet,
11...Engine. D... Exhaust pipe, 13... Heat pipe, 14... Evaporation section, 15...
...condensation section.

Claims (1)

[Claims] 1. A heating device for an automobile, characterized in that a duct having an air blower and an outlet opening into a vehicle interior is installed, an evaporating section of a heat pipe is attached to an exhaust pipe, and a condensing section is disposed within the duct.