JPH0367720A - Heater - Google Patents

Abstract

PURPOSE: To compact structure by heating a gaseous heating medium by a second heat exchanger circulated with heated liquid heating medium to perform heating, in an automotive heater equipped with a burner surrounded by a heat exchanger for heating the liquid heating medium. CONSTITUTION: This heater 1 has a closed type liquid circulation path composed of space parts 2-4 communicated with each other, and arranges a liquid fuel actuation type burner 5 in a first space part 2. The burner 5 generates high- temperature combustion gas in a combustion chamber 6, and the gas is direction- converted at the end part of the chamber 6 being in the opposite side to the burner 5 to be flowed down in an intermediate space part being between the chamber 6 and a heat exchanger 8 surrounding the chamber 6, thereby being exhausted from an exhaust gas outlet 9. The space parts 3 and 4, provided with an outlet connection part 13 and an inlet connection part 14 respectively, are communicated with the above space part 2, and a liquid heat exchange medium is circulated with an air heating heat exchanger 10 between, thereby heating and blowing off air as warm air into a car room.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention comprises a burner for generating hot combustion gases in the combustion of fuel in a combustion chamber and for transferring heat to a liquid heat exchange medium of an associated heat exchanger. The present invention relates to a heater, particularly an automobile heater, and an automobile heating device incorporating the heater.

[Conventional technology]

Heaters, particularly heaters for self-help vehicles of the type described above, are known in the art and are so-called water heaters. These water heaters require a relatively large amount of space when installed in a motor vehicle and generally use a coolant circulating in the coolant circuit of the internal combustion engine as the liquid heat exchange medium. However, this kind of water
Since the heater has a large number of heat sinks in the coolant circulation path, its reaction operation is relatively slow. That is, there is a problem in rapidly heating the inside of a car.

Another type of heater construction that can be operated independently of the car engine is the so-called air heater, in which the hot exhaust gases produced when fuel is combusted are transferred to a heat exchanger. The heat is transferred to a gaseous heat exchange medium, for example air. However, this air heater suffers from its large size due to the various components required to effect the required heat exchange from the hot combustion gases to the gaseous heat exchange medium.

From West German Patent Publication No. 3718611, there is known a heating and ventilation device for an automobile, in which an air heater is installed as an auxiliary heater in the heating and ventilation device for an automobile. and for this purpose a corresponding ventilation and distribution system is provided for the device.

Further, from West German Patent No. 975062, an air heater is combined with an automobile heat exchanger, and the coolant circulating in the coolant 61 passage of the internal combustion engine is controlled by the heat exchanger connected downstream of the heater. Automotive heating/ventilation devices are known that are heated and vented in the same state. In this case, the heat exchanger is in the form of a coil.

That is, a cooling liquid acting as a heat exchange medium flows through the coiled heat exchanger and the coiled tubes are washed by hot air carried by the air heater.

[Summary and operation of the invention]

The main object of the invention is to provide a heater, in particular a heater for automobiles, which is as compact in construction as possible and which can provide heat quickly and efficiently for heating purposes.

A related object of the present invention is to provide a heating system for an automobile that can incorporate the above-mentioned automobile heater.

According to a preferred embodiment of the invention, a heater, in particular a heater for automobiles, is disclosed which comprises a burner surrounded by a first heat exchanger working with a liquid heat exchange medium. The liquid heat exchange medium is heated in the first g exchanger and then flows through the second heat exchanger. This second heat exchanger works with and transfers heat to the gaseous heat exchange medium. After passing through the second heat exchanger, the liquid heat exchange medium returns to the first heat exchanger.

In the heater of the present invention, the liquid heat exchange medium is transported through a circulation path in which the second heat exchanger is disposed. By using the liquid heat exchange medium, the size of the heater can be reduced and the heat exchange within the liquid heat exchange medium circuit can be utilized more efficiently. Therefore, the heater of the present invention can very quickly provide hot air that can be used for heating purposes, for example for heating the interior of an automobile or the like.

Another development example of the present invention is when the heater of the present invention is used for a stationary vehicle or as a so-called auxiliary heater when a non-exchanger for a vehicle cannot provide sufficient heat to heat the inside of the vehicle. In this case, a blower is provided in association with the second heat exchanger to convey the air heated in the second heat exchanger for a predetermined purpose, for example, to heat the inside of the vehicle.

Preferably, the heater of the present invention is configured to lit the liquid heat exchange medium by utilizing the so-called thermosyphon effect. Further, the configuration of the present heater is preferably such that the heat exchanger surrounds the burner within a closed liquid circulation path formed by the hollow portion of the first heater.

The thus heated liquid heat exchange medium thus rises in the circuit and passes in a downward flow through the second heat exchanger. That is, in the heater of the present invention, due to this so-called thermosiphon effect, the liquid heat exchange medium can be automatically conveyed within the circulation path without requiring a separate flow generating member.

When the heater of the present invention is integrated into the coolant am path of an internal combustion engine and is used to preheat the engine, it is preferred that the liquid heat exchange medium be forced to circulate. For this purpose, a portion of the heated liquid heat exchange medium is branched off before flowing into the second heat exchanger and introduced into the coolant circuit of the internal combustion engine by forced circulation, for example using a circulation pump. It would be a good idea to send it in.

The heater of the invention is designed to generate heat for heating the interior of the vehicle, i.e. to perform an auxiliary heating function, until sufficient heat is available by the vehicle's internal combustion engine to operate the vehicle heat exchanger. When using a heater, it is desirable to arrange a valve iu in the circulation path of the liquid heat exchange medium, i.e., by means of the valve member, the flow rate of the coolant flowing through the heater is reduced in a controlled manner. An auxiliary heating function can be achieved to avoid temperature drops during the warm-up period of the internal combustion engine.

According to an advantageous embodiment of the invention, the second heat exchanger working with a gaseous heat carrier, such as air, has a sufficiently large cross-sectional area of the tube member carrying the liquid heat exchange medium so that the flow of the liquid medium The structure is configured such that almost no throttling effect is exerted on the liquid heat exchange medium, thereby optimizing the heat exchange between the liquid heat exchange medium and the gaseous heat exchange medium.

According to a preferred embodiment of the invention, the heater is mounted within the heated air circuit of the automotive heating system. Since the heater according to the invention can be constructed with small dimensions, it is possible to integrate the heater into a heating device for a motor vehicle, thus making it easier to install an auxiliary motor vehicle heater in series.

〔Example〕

Hereinafter, preferred embodiments of the heater according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, the entire heater for a self-help vehicle of the present invention is designated by the reference numeral 1. This heater is a closed type liquid
The flip path has a space portion 2. which is in communication with each other.
3.4. First box-shaped space 2
A liquid fuel operated burner 5 is arranged therein. The burner 5 can be supplied with fuel and/or combustion air in a conventional manner, so that a detailed explanation in this regard is omitted.

In operation, burner 5 generates a flame within combustion chamber 6, as shown in FIG. During combustion in the combustion chamber 6, hot combustion gases are generated which are redirected at the end of the combustion chamber 6 opposite the burner 5 and then into the combustion chamber 6 and the surrounding heat exchanger. It flows through the intermediate space between 8 and 8.

! ＆ Hayashi's information is that after this high temperature gas passes through heat exchanger 8,
As shown by the arrow in FIG. 1, the exhaust gas flows out from the heater I through the exhaust gas outlet 9.

The heat exchanger 8 works with a liquid heat exchange medium flowing inside it. The liquid heat exchange medium can be a coolant in the coolant circuit of a motor vehicle engine, for example water. As shown in FIG. 1, it is preferable that the automobile heater l, which is disposed from the combustion chamber 6 and the heat exchanger 8 surrounding the combustion chamber, be placed in an upright position in the first box-shaped space 2. . In the heat exchanger 8, the high-temperature combustion gas generated in the combustion chamber 6 transfers its heat to the liquid heat exchange medium, so that the liquid heat exchange medium flows into the first space as indicated by the arrow in FIG. Move upward within section 2.

The first box-shaped space 2 is directly connected to the second space 3.

That is, the space 3 is designed to occlude the extension of the space 2. The liquid heat exchange medium heated by the heat exchanger 8 flows into the second space 3 . Note that it is desirable that the second space 3 has a front shape. After leaving the second space 3, the heated liquid heat exchange medium flows into a second heat exchanger 10 in cooperation with the gaseous heat exchange medium. Each tube member 11 of the second heat exchanger 10 through which the liquid heat exchange medium flows is designed to have as large a cross-sectional area as possible, so that in the region of the heat exchanger 10 no throttling effects occur. Minimized. In the heat exchanger 10, when the heated liquid heat exchange medium flows down the tube member 11, at least a portion thereof is transferred to the gaseous heat exchange medium such as air to generate warm air, that is, for heating purposes. , producing warm air that can be used, for example, to heat the interior of a car.

To facilitate the transport of heated air within the second heat exchanger IO, it is advantageous to arrange the blower 12 approximately in the center of the second heat exchanger 10. After passing through the second heat exchanger 10, the liquid heat exchange medium decreases in temperature and accumulates in the third space 4. Note that this third space B4 is directly connected to the first space 2. In this way, the liquid heat exchange medium whose temperature has decreased while flowing through the heat exchanger 10 returns to the first space 2, is heated again by the first heat exchanger 8 disposed here, and is heated again in the first space. Move up again within the department. Such a circulating flow of the liquid heat exchange medium flowing in the closed liquid circuit 6i bottomed in the spaces 2.3 and 4 is based on a so-called thermosiphon drop.

Furthermore, in FIG. 1, the outlet connection 13 is shown using a dashed line, and the outlet connection 13 is connected to the second space before the liquid heat exchange medium passes through the second heat exchanger IO. 3
It is branched from. This outlet connection part 13 is, for example,
It can be connected to the coolant circuit of an internal combustion engine. This will be explained in more detail later with reference to FIG. In addition, the population connection portion 14 is indicated by a dashed line.

Depending on the situation, this inlet connection 14 can also be used to act as a return connection for the coolant circuit of the vehicle with respect to the third space B4 of the vehicle heater 1.

FIG. 2 shows an automotive heater 1 detailed with respect to FIG.
An embodiment is shown in which the cooling liquid circuit 15 is incorporated into the coolant circulation path 15 of the internal combustion engine 16. A circulation pump designated by reference numeral 18 is connected to a line section 1 that exits from the internal combustion engine 16 and reaches the automobile heater l.
It is located in 7. Of course, this circulation pump 18 can also be incorporated into the automobile heater l. The circulation pump 18 forcibly circulates the coolant in the coolant circulation path 15 to preheat the internal combustion engine 16 so that, for example, a cold start can be easily performed.

The downstream side of the automobile upper tank 1 is connected to an automobile heat exchanger 19 which is approximately connected to the coolant circulation path 15 . The automotive heat exchanger 19 is typically provided within the heating system of the vehicle. In order to prevent a temperature drop during warming up of the internal combustion engine 16, the valve i material 20 is connected upstream of the automotive heater l, especially for auxiliary heating operations using the automotive heater 1. By using this valve member 20, the flow rate of the coolant flowing within the automobile heater 1 can be controlled and reduced, and therefore rapid heating of the coolant within the automobile heater 1 can be achieved. That is, when the coolant flows through the automotive heat exchanger 19, it generates heat,
This generates heated air for heating the passenger compartment, for example.

When the vehicle heater l is used for preheating the internal combustion engine 16 and for heating purposes, for example to generate heat for heating in an auxiliary heating operation, the internal combustion engine 16 and the vehicle heater l are heated with a coolant. The illustrated example incorporated in the circulation path 15 is a preferred example of the installation example of the automotive heater l of the present invention.

Another preferred embodiment of the installation of the automotive heater of the present invention is shown in FIG. FIG. 3 schematically shows an example of a heating and ventilation system for a motor vehicle. In this figure, the automobile heat exchanger 19 of FIG. The difference is that they are connected in the direction of air flow. This results in
The air entering the motor vehicle via the air intake 22 can be conditioned and cooled before it flows into the passenger compartment via the corresponding tube. On the downstream side of the intake port 22, an automobile blower 24 is disposed within the air pipe 23. The blower 24 serves to draw air into the ductwork of the vehicle heating and ventilation system.

In this embodiment, the automotive heater 1 of the invention is designed and illustrated as a block-shaped section, which is interposed in the direction of air flow. That is, it is connected downstream of the blower 24 and upstream of the block-shaped evaporator section 21 . In the vehicle heating and ventilation system shown here, the required flow paths can be adjusted respectively by means of a corresponding approximately number of flaps 25.

In the embodiment shown in FIG. 3, the flap 25 is closed and the flap 25' is open, bypassing the block evaporator 121 and the motor vehicle heat exchanger 19 and leading to the outlet 26, 27 leading to the passenger compartment 28 of the motor vehicle. It forms a flow path leading to the In this way, the block-shaped evaporator 21 and the automobile heat exchanger 1
9, the heated air generated by the self-help vehicle heater 1 bypasses the block-shaped evaporator WI21 and the automobile heat exchanger 19 and reaches the passenger M28, as shown by the arrow.
is conveyed along a channel leading to the heating purpose. The outlet 26 communicates with the window of the vehicle, specifically the windshield, and the outlet 27 communicates with the undercarriage space of the vehicle. In this way, the warm air generated from the automobile heater 1 is
In some cases, a blower 12 is used to force the air into the cabin 28 to quickly warm it up.

When the automotive heater l corresponding to the embodiment shown in FIG. 2 is used for auxiliary heating purposes, in the automotive heating/ventilation system shown in FIG. Heat exchanger 19 is used to supply heat to passenger compartment 28 . The flap 25 of FIG. 3 is adjusted accordingly.

Since the automotive heater l of the present invention requires an extremely small space, it can be integrated into the automotive heating/ventilation system shown in Figure 3. Therefore, the installation of the heater l can be simplified. .

Although various embodiments according to the present invention have been illustrated and described above, the present invention is not limited thereto and is capable of various modifications and improvements known to those skilled in the art. Accordingly, the present invention is not limited to the details shown and described herein, but is intended to include all modifications and improvements provided they do not depart from the scope of the appended claims.

〔Effect of the invention〕

As explained above, according to the heater according to the present invention, the high-temperature liquid medium heated by the heat exchanger is passed through the heat exchanger that cooperates with the gaseous heat medium, and the heat exchanger that cooperates with the liquid heat medium Since the heat is allowed to flow in again and circulate, the heater can be made compact and heat exchange can be performed quickly and efficiently.

[Brief explanation of drawings]

1 is a sectional view of a heater for an automobile according to a preferred embodiment of the present invention; FIG. 2 is a schematic diagram of a heating system in which the heater of FIG. 1 is integrated into a coolant circulation path of an internal combustion engine of an automobile;
FIG. 3 is a schematic diagram of the heater of FIG. 1 when installed in a heated air circulation path of an automotive heating system. 1... Automotive heater, 2.3.4... Space part,
II...Pipe member, 12.24...Blower, 1
6... Internal combustion engine, 19... Automotive heat exchanger,
25.25'...flap.

Claims (8)

[Claims] (1) A heater equipped with a burner surrounded by a heat exchanger that cooperates with a liquid heat medium, in particular a heater for automobiles, in which the high temperature liquid heat medium heated by the heat exchanger (8) is a gaseous heat medium. passing through a heat exchanger (10) cooperating with the gaseous heat carrier to transfer its heat to the gaseous heat carrier;
A heater characterized in that, after passing through a heat exchanger (10) cooperating with a gaseous heat carrier, it flows back into a heat exchanger (8) cooperating with a liquid heat carrier. (2) A blower (12) is connected to a heat exchanger (10) that cooperates with the gaseous heat medium in order to convey the heated gaseous heat medium. 1
) The heater described. (3) A burner (5) is disposed in a closed liquid circulation path formed by the spaces (2, 3, 4) of a heat exchanger (8) surrounding the burner (5), and is heated by the burner. a heat exchanger (10) in which said liquid heat transfer medium rises and then cooperates with a gaseous heat transfer medium;
3. The heater according to claim 2, wherein the heater descends through the interior of the heater. (4) Claim (4) characterized in that when the heater (1) is installed in a coolant circulation path of an internal combustion engine (16) to preheat the engine, the liquid heat medium circulates freely. 3) The heater described. (5) The heater according to claim 4, further comprising a circulation pump (18) for forcibly circulating the liquid heat medium. (6) For auxiliary heating, the internal combustion engine (
Heater according to claim 5, characterized in that a valve member (20) is provided for preventing a drop in temperature during the warm-up period of step 16). (7) The pipe member (11) carrying the liquid heat medium of the heat exchanger (10) that cooperates with the gaseous heat medium has a large cross-sectional area so that only a small throttling effect occurs. The heater according to claim (6). (8) The heater according to claim (7), wherein the heater (1) is installed in a heating air circulation path of an automobile.