JPH02189226A - Heater for automobile - Google Patents

Abstract

PURPOSE: To improve rising performance of heating operation in a heating device comprising a heat accumulator provided on an exhaust pipe by connecting an extended cooling liquid circuit provided with a heater for heating a room to the heat accumulator, and circulating cooling liquid of an engine through the heat accumulator. CONSTITUTION: In an automobile such as a bus, a heat accumulator 5 is connected to an extended cooling liquid circuit 4 of an internal combustion engine M, and an exhaust pipe 1 is connected to a change-over valve 6 to an inlet 7 of the accumulator 5. The accumulator 5 is provided with a set of heat pipes 9, and each heat pipe 9 is composed of an outer pipe 10 and an inner pipe 11 connected to each other and disposed concentrically by heat radiation fins 12 in the longitudinal direction, for example, and heat accumulating material 13 filled inside space B between them. A pump 24 is provided in a feed duct 23 as an extension part of the cooling liquid circuit 4 connected to an inlet stab 16 of the heat accumulator 5, and a heater 26 to heat a passenger space is provided on a return duct 25 connected to an outlet stab 17 of the heat accumulator 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for heating motor vehicles, primarily buses with internal combustion engines.

[Conventional technology]

As is known, various types of heaters are used for heating passenger spaces in motor vehicles, for example buses. These devices utilize exhaust gas or engine coolant to heat the passenger space and driver's seat. Such a method is described in Hungarian Patent Specification No. 169,772.
or German Patent No. 2.829,454.

In other methods, additional or separate heating sources, sometimes heat storages, are used to heat the passenger space independently of the engine.

This heat storage heater is, for example, Soviet inventor's certificate No. 761.30.
It is stated in No. 9.

The heater includes heat pipes interconnected to the exhaust pipe and the vehicle body, and a heat storage material, for example a paraffin-filled shell heat storage, disposed between the heat pipes. The purpose of this heat storage is to stabilize the heating characteristics of the passenger space when the engine is stopped for a short time by using the thermal energy of the medium preheated in this heat storage. .

A similar heat storage heater is disclosed in U.S. Patent No. 3.986,
It is described in No. 665. Here, the heat storage is integrated into the heating system of the passenger space. The thermal energy of the exhaust gas is stored in this regenerator by absorption when the exhaust gas is above a preset minimum temperature. This regenerator is surrounded by a vacuum space for adequate thermal insulation.

This vacuum is stopped by entering a heat transfer fluid during discharge, thereby warming the air inside the vehicle.

A common feature of these heat storage heaters is that because of their construction, heat transfer, and heat storage factors, they can only heat for a maximum of 30 to 60 minutes when the engine is not running. Its structure is complex and expensive;
Therefore, this heater is generally not used practically.

Motor vehicle operators and designers have long been concerned with the problem of facilitating engine starting after long periods of inactivity, especially during winter.

This known heater with or without a regenerator is not suitable for this purpose.

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned drawbacks by providing an improved heater for motor vehicles, primarily buses, which makes better use of exhaust gases at relatively low cost, simple construction and small space requirements. This is an attempt to solve the problem.

Another object is that the heater of the invention is able to suitably prewarm the engine and, in certain cases, the passenger space before starting, even if the engine has been inactive for 8 to 10 hours. It is to do so.

Means for Solving the Problem The solution to this problem is based on the above-mentioned Soviet heater, which has a heat accumulator that allows interconnection of the exhaust pipe and the space to be heated.

This is further developed by interconnecting the regenerator directly with the extended coolant circuit of the engine or, when using an additional heat extraction medium, via a heat exchanger,
A circulation pump is integrated into this circuit and is operated independently of the operating mode of the engine.

The inlet and outlet stubs of the regenerator configured for the heat extraction medium are connected to the feed and return conduits forming an extension of the refrigerant circuit, and a fuel filter and/or at least one heater of the space to be heated is provided. Structures that are integrated into this return conduit are possible.

Suitably, the inlet of the regenerator is connected to the exhaust pipe via a switching valve arranged between the exhaust pipe and the muffler and is preferably remotely controlled by a thermal sensor of the regenerator.

In certain cases, a conduit interconnecting the return and feed conduits is incorporated between the outlet stub of the regenerator and the heater and is fitted with a check valve to provide unidirectional flow.

According to another feature of the invention, a heat exchanger is connected between a feed conduit and a return conduit forming an extension of the coolant circuit of the engine, its inlet and outlet configured for an additional medium. A construction is also possible in which the inlet and outlet stubs of the regenerator are connected via conduits to the inlet and outlet stubs of the regenerator.

Preferably, a separate pump is mounted in a conduit connected to the inlet stub of the regenerator and is controlled by a thermal sensor incorporated in the feed conduit.

In another preferred construction, the heat exchanger is coupled between a feed conduit and a return conduit forming an extension of the engine coolant circuit, the inlet configured for the additional medium being at the outlet of the regenerator. A further switching valve integrated into the exhaust pipe can be connected to the inlet of the regenerator, and an inlet stub and an outlet stub of the regenerator can be connected through the conduit to an inlet of the regenerator. Interconnected with the space to be heated, a fan is also installed in the conduit connected to the outlet of the heat exchanger and in the conduit leading from the passenger space to be heated back to the heat storage.

The heat pipes of the thermally insulating housing of the regenerator, provided with an inlet and an outlet for one medium and an inlet stub and an outlet stub for the other medium, are connected in parallel and at least partially in series, the A central conduit is connected in heat communication with a medium (e.g. exhaust gas) on the one hand, and on the other hand:
The outer enclosure is coupled in thermal communication with another medium as a heat extraction medium (eg, coolant, oil, etc.) located within the isolated interior space.

The central conduit of the heat pipe can be connected directly to the inlet and outlet of the heat storage, and the outer enclosure of the heat pipe can be connected within a space (e.g., a coolant space) of the heat storage housing in which the inlet and outlet stubs are provided. will be placed in

The inlet and outlet of the regenerator are preferably interconnected via additional heating pipes running along the regenerator. These are surrounded by a housing space in which a large loss stub and an outlet stub are provided. The heat pipes are arranged at a distance from the heating pipes and in the same space.

The hot exhaust gas is thus indirectly coupled to the heat pipe via the heat transfer fluid, whereby the heat load on the heat pipe is reduced.

Heat pipes have one or more sealed cavities that receive suitable heat storage materials.

Preferably, heat storage latent materials such as barium hydroxide can be used for this purpose.

Particularly effective heat transfer is obtained by heat pipes having an outer pipe and one or several inner pipes inside the pipes, between which a heat storage material is filled. The inner shroud of the inner pipe or pipes surrounds the media guiding conduit, and the outer shroud of the outer pipe appears as the other heat transfer surface. The inner pipes can be arranged coaxially and, in the case of several inner pipes, at the same distance from each other and from the outer pipe.

EXAMPLES The invention will be described in detail with the aid of the accompanying drawings, which illustrate by way of example certain embodiments thereof.

1 to 3 show an embodiment of the heater of the invention according to a first example. The exhaust pipe of the internal combustion engine M of the bus (not shown) is designated by 1, the coolant circulation pump by 2 and the muffler by 3.

The radiator of engine M is not shown separately since the operation of the heater of the invention is completely independent of it.

According to the invention, the heat storage 5 is connected to the extended coolant circuit 4 of the engine M. In Figure 1, exhaust pipe 1
is connected to the lower part of the heat storage device 5 via the switching valve 6,
The cooling consumption gas also exits through the outlet 8.

Examples of the details of the heat storage device 5 are shown in FIGS. 2 and 3. In this case, the engine coolant acts as a heat extraction medium. As shown in FIG. 2, the heat storage device 5 is provided with a set of heat pipes 9. As shown in FIG. The cross section of these heat pipes 9 is
As shown in the figure.

The heat pipe 9 consists of an outer pipe 10 and an inner pipe 11 which are interconnected by longitudinal, e.g. radial fins 12 and are arranged concentrically. Heat storage material 13 is pipe 1
0 and the pipe 11 and processed as will be described in further detail.

The housing 14 of the regenerator 5 in this example has an inlet lower and an outlet 8 for the exhaust gas and is also provided with a thermal insulation layer 15 and an inlet stub 16 for further heat extraction media.
and an outlet stub 17 are provided. As shown in FIG. 2, the lower inlet and outlet 8 are the central duct 18 of the heat pipe 9
are interconnected through. The hot spent gases entering the inlet lower flow freely through the duct 18 towards the outlet 8. The coolant of the engine as a heat extraction medium passes through the inlet stub 16 into the space A of the heat accumulator 5 accommodating the heat pipe 9.
, so that this coolant flows in the opposite direction along the outer enclosure as a heat transfer surface of the outer pipe IO of the heat pipe 9, this flow is guided by the deflector 19, and the coolant in the space A The heat storage device 5 passes through the outlet stub 17.
go out from The space A containing the heat extraction medium is sealed on its two sides by end plates 20 and 21 in which the central duct 18 of the heat pipe 9 is provided with a suitable hole 22.

As shown in FIG. 1, the heater of the invention has a feed conduit 23 as an extension of the coolant circuit 4 connected to the inlet stub 16 of the regenerator 5. A pump 24 is incorporated into conduit 23. A return conduit 25 is connected to the outlet stub 17 of the regenerator 5, in which a conventional heater 26 is mounted for heating the passenger space (not shown) of the vehicle. Conduit 23A is provided to interconnect conduits 23 and 25 to built-in check valve 27.

The purpose of this is to prevent the heat extraction medium from the heat storage 5 from being recycled.

According to FIG. 1, a known thermal sensor 28 (thermostat) is integrated into the feed conduit 23, which is controlled in connection with the actuation of the pump 24. In this case, the heat accumulator 5 is likewise fitted with a heat sensor 29, which remotely controls the switching valve 6.

The return conduit 23 has a conduit 30 which straddles the heater 26, via which the heater 26 can be released from the extended coolant circuit 4 if required. Furthermore, conduit 3
1 is connected in parallel with the conduit 25, so that the fuel filter 32 of the diesel engine M is integrated into the coolant circuit 4 and preheated. This too can be released if necessary.

During operation of engine M, hot exhaust gas is
It flows from the exhaust pipe 1 into the heat storage device 5 through the inlet lower at the position . It flows through the central duct 18 of the heat pipes 9 and these heat pipes together with the heat storage material 13 become heated. In this case, it is practical to use a latent material as the heat storage material. The solid-liquid phase change temperature of this material is 2.3"C lower than 100'C. Under the action of heat, this latent heat storage material 13 melts at said temperature and stores heat for a long time. can do.

At the same time, i.e. when the engine M is running, the pump 2 forces the coolant through the conduit 23A, the check valve 28 and the heater 26, thereby heating the passenger space and the driver's seat.

A thermal sensor 28 in the feed conduit 23 - before the conduit 23A branches off - detects the temperature of the circulating coolant. When a preset lower limit is reached, thermal sensor 28 issues an electrical control signal to start pump 24. A pump 24 then circulates the coolant as a heat extraction medium through the heat storage 5 so that it acts as a supplementary heat source for heating the passenger space and the driver's seat, so that in this case the higher temperature The coolant of the heater 26
It will flow to

As soon as the temperature of the coolant reaches the preset upper limit in conduit 23, thermal sensor 28 stops pump 24.

The purpose of the thermal sensor 29 of the regenerator 5 is to prevent the regenerator from overheating. For this reason, when a preset temperature is reached, this thermal sensor issues a control signal to switch the switching valve 6 when the heat exchanger is released from the consumer gas circuit, so that the hot exhaust gases are directed directly from the exhaust pipe 1. Enter silencer 3 and exit from here.

In the heat recovery mode of operation (e.g. in winter or after a long period of engine inactivity), the thermal energy previously stored in the heat storage 5 and maintained even after a shutdown of the engine M lasting from 5 to 10 hours is activated. , the coolant of the engine M, the fuel filter 32, and if necessary, the heater 26 in the passenger space are also used to preheat the engine M before starting. In this way, extremely favorable engine starting conditions are provided.

For this preheating according to the invention, first the pump 24 is started, which circulates the cooled coolant through the space A of the heat accumulator 5 and at the same time heat pipe 9
This coolant is heated by the thermal energy maintained within it. This preheated coolant is circulated by the pump 24 through the bypass conduit 30 - if necessary the heater 26 - the fuel filter 32 and the water space of the engine M, thereby preheating them.

If the heat storage capacity is low, it is desirable to preheat only the engine M and the fuel filter 32. After this preheating, the engine has more favorable starting conditions, which subsequently allows the passenger space to be heated relatively quickly.

During the course of the experiment, the heat storage capacity and the heat extraction and heat transfer rate of the regenerator 5 were selected appropriately to obtain a temperature increase of 15-35° C. by preheating the engine M for 5-25 minutes. However, knowledge of the invention will show that the dimensions of these structural units belong to the essential knowledge of the average specialist and are therefore not mentioned separately.

FIG. 4 shows, by way of example, another preferred embodiment of the heat storage device 5. This differs fundamentally from the previously described device in that the hot exhaust gas entering the inlet lower does not come into direct contact with the heat pipe 9 and the heat storage material 13, but an indirect heat transfer connection is provided. That's true. This means that heating pipes 33 passing through the regenerator 5 are incorporated between the inlet lower and the outlet 8 and through these heat pipes the hot consumption gases flow, while the outer heat transfer enclosure is the heat extraction medium, i.e. in this example Then, it enters the space A through the inlet stub 16 and the outlet stub 1
7, meaning that it comes into contact with the cooling fluid exiting through 7.

A heat pipe 9 is arranged at a distance from the heating pipe 33 so that heat is indirectly taken from the coolant.

Similarly, a latent material was selected as an example of a heat storage material provided with another inlet stub 34. Since the heat load of the heat storage material 13 is reduced compared to the first embodiment, barium hydroxide-octahydrate is used as the latent material, whose phase change, i.e. its melting temperature, is according to this experiment approximately 78 It is °C. This material melts at these temperatures and allows heat storage. During heat recovery, this latent material begins to crystallize (solidify) at cooling temperatures below 78° C. and at the same time transfers heat to the heat extraction medium that is circulated around the heat pipes 9.

This embodiment of the heater of the invention is shown in FIGS. 5 to 8, and the heat is extracted by a medium, for example oil from the heat storage 5. Here, a medium-cooling liquid heat exchanger 37 is connected to the cooling liquid line 23 via lines 35 and 36.
The inlets and outlets for and 25 are connected to a regenerator 5 provided in the usual manner. It can be seen that the heat exchanger can replace the engine's oil cooler if necessary.

A controlled distribution pump 38 connects the inlet stub 16 of the regenerator 5
It is incorporated in a conduit 35 connected to the feed conduit 23, the drive of which is controlled by a thermal sensor 28 of the feed conduit 23.

The difference with the embodiment shown in FIG. 5 is that during operation of the engine M the pump 2 pushes the coolant through the heat exchanger H32;
The only point is to send it to the heater 26 in the passenger space. Thermal sensor 28 detects the actual temperature of the coolant in conduit 23 and starts pump 36 at a temperature below its lower limit.

In the case of medium-2, a forced flow of oil causes subsequent heating of the coolant in the heat exchanger 37 to occur. The thermal sensor 28 stops the pump 38 so that heat transfer takes place in the heat exchanger 37 as soon as the temperature of the coolant coming from the engine M reaches the set upper limit value.

Thermal energy in the heat storage 5 is recovered by simultaneous operation of the pumps 24 and 38. In this case, the coolant is heated by the medium and the heat exchanger 37 is installed between the engine 1 fuel filter 3
2 and preheat the interior of the bath through heater 26 if provided.

Further exemplary embodiments of the heat storage device 5 according to the invention are shown in FIGS. 6 to 8. According to Figure 6,
A heat pipe 9 is disposed in a thermally insulated housing 14 in a direction transverse to the space A, that is, the exhaust gas inlet lower and outlet 8 .

For oil as medium, the regenerator 5 is connected to the inlet stub 1
6 is provided with a media inlet and distribution unit 39. This unit conveys oil by a series connection to the inner duct 18 of the heat pipe 9, which extracts heat from the heat storage material 13 filled in the heat pipe 9, and then turns the end of this pipe to coincide with the outlet. It exits the heat pipe 9 from the section through the medium-collection unit 40 formed in the outlet stub 17, passes through the heat storage 5 and exits. Figures 6 and 7 clearly show how the heat pipe 9 and its duct 18 are connected in series. FIG. 8 shows a cross-sectional view of the heat pipe 9.

Here four inner pipes 11 are arranged inside the outer pipe 10 at the same distance from each other and from the outer pipe 10. The heat storage material 13 is the inner pipe 11 and the outer pipe 1
It is arranged as a filling in the space B between 0 and 0.

This material can be a latent material whose phase change temperature is greater than or equal to 100° C. and less (and 100° C. lower) than the average temperature of the exhaust gas exiting through the engine M.

A third embodiment of the heater of the invention is illustrated by way of example in FIGS. 9 and 1O, for use, for example, in hot air heating baths.

Air ducts 41 and 42 are connected to the inlet stub 16 and outlet stub 17 of the regenerator 5, and the other end is connected to the air duct of the passenger space at a point 43 as shown in FIG. .

Similar to the device of FIG. 5, a heat exchanger 37 is incorporated into the extended coolant circuit 4 and is connected to the coolant conduits 23 and 25. In this case, the switching valve 45 is installed in a pipe connected to the lower input of the heat storage device 5 for exhaust gas,
This switching valve is then connected to an outlet 47 of the heat exchanger 37 via a conduit 46. A fan 48 is integrated into the conduit 46, making it possible to circulate air as a heat extraction medium in a closed circuit between the regenerator 5 and the heat exchanger 37 (to be explained in more detail). ).

An air filter 49 is further provided to remove impurities present in the air circuit, and a duct 5 interconnects the outlet 8 of the heat storage 5 and the heat exchanger 37 via a switching valve 51.
It will be incorporated into 2.

A suitable embodiment of the regenerator 5 of FIG. 8 is shown in FIG. As mentioned above, air was used here as the heat extraction medium.

A heat pipe 9 is arranged horizontally in a housing 14 insulated with a jacket 15 and its duct 18 connects to an upper transfer port 53.
and are connected in series through a lower transmission boat 54. In addition, the heat pipe 9 can be the same as shown in FIG. The melting temperature of the latent material used in the heat pipe 9 as a heat storage material is desirably selected to be 100''C or higher.

During the filling of the regenerator, the outer heat transfer surfaces of the heat pipes 9 come into contact with the hot consumption gas and, in the heat recovery mode of operation, with the air used as a medium. In the inner duct 18 of the heat pipe 9 there is always a flow of air which is used to heat the passenger space and the driver's seat.

The operating modes of the apparatus of FIGS. 9 and 10 are as follows.

During operation of the engine M, the hot exhaust gases at the positions of the switching valves 6° 45 and 51 shown in FIG. 9 flow through the heat pipe receiving space A of the regenerator 5. At the same time, fan 44 forces air through conduit 41 and into inlet stub 16 of regenerator 5 .

The heated air in the heat storage 5 - mixed with the required amount of ambient air - is passed into the interior of the car to heat the passenger space and the driver's seat.

After stopping the engine M for 6 to 8 hours, the thermal energy stored in the heat storage 5 is used to preheat the engine. For this purpose, air as heat extraction medium is flowed over the regenerator 5 instead of the exhaust gas, for which purpose the switching valve 6.
45 and 51 are switched to other operating positions. In this case, the switching valves 45 and 51 respectively stop the flow towards the exhaust pipe 1 and out to the outside, so that a closed air circuit is created between the regenerator 5 and the heat exchanger 37.

Air is circulated in this closed circuit by a fan 48.

Preheating of engine M is actually performed by fan 48 and pump 2.
It is started with 4 simultaneous starts.

During the heat recovery period, efficient heat extraction and heat transfer occurs on the heat transfer surfaces of the regenerator 5. This ensures the use of air, whose heat transfer capacity is lower than that of a liquid, as the heat extraction medium of the invention, and also the heat output necessary to preheat the engine M.

The ratio of the thermal energy recovered from the engine M and the fuel filter 32 or, if provided, the heat storage 5 used for preheating and heating the passenger and driver seats, adjusts the air distribution of the fans 44 and 48 according to the actual requirements. It can be set by

During the heating of the exhaust gas and in the heat recovery mode of operation, air as a medium enters the heat storage 5 through the inlet lower and then flows perpendicularly into the heat pipes 9 in the direction fixed by the horizontal baffle plate 19. , and finally exits the regenerator 5 through the outlet 8.

The air used to heat the passenger space and the driver's seat enters the heat storage 5 via the inlet and distribution stub 16 and flows vertically through the inner duct 18 of the heat pipe 9. By suitable series connection of heat pipes 9, the number of air ducts can be increased. Air is guided by inversion and transfer ports 53 and 54 between duct 18. This heated air leaves the regenerator 5 through the outlet stub 17 (.

During the filling process of the heat accumulator 5 the fan 44 brings about an overpressure in the inner duct 18 of the heat pipe 9 which is higher than the overpressure of the exhaust gas flowing along the outer enclosure of the heat pipe 9. This in turn prevents impurities from passing through the exhaust gases into the air system that serves to heat the car, such as a heater leak.

The main advantages of the thermal storage heater according to the invention are: - Since exclusively waste thermal energy is used, i.e. no extra heating mechanism is required, the heater according to the invention provides an efficient energy-saving heater.

In the heater of the present invention, the exhaust gas undergoes a pressure drop in the regenerator 5 instead of the muffler 3, and the insulated regenerator 5 takes over the role of the muffler, so that the power of the engine M can be reduced. There is no reduction.

- Since the operation of the engine M for heating is unnecessary before starting the car, the engine M
Further significant energy savings are achieved by preheating the coolant and fuel filter 32. This means significant fuel savings for the driver, especially in winter.

Preheating of the engine M according to the present invention has a positive effect on the service life of the engine.

Promoting single preheating improves driving safety and passenger comfort.

During operation of a motor vehicle, for example a bus, a heat output independent of the power of the engine M is available for heating the vehicle.

- In a given case, the thermal energy of the coolant and the exhaust gas are utilized equally.

One heater according to the invention is relatively low-grade and requires only a small amount of space for installation.

From the above it is clear that each embodiment of the heat storage 5 shown by way of example is of double-tube construction in a closed system. However, it is noted that any other suitable regenerator can be used with similar advantage, in which case the exhaust pipe is simply arranged in the water space. In the case of this hot water regenerator, a separate electrical heating cartridge is provided extending into the tank of the hot water regenerator. For example, after several days of downtime - when the regenerator 5 has completely cooled down -
The bath can be heated with relatively low electrical power, i.e. the heat storage can be charged with 2-3 hours of thermal energy with 1-2 KH of power. The regenerator filled in this manner allows the engine M to be preheated to the required degree for 5 to 10 minutes.

Finally, in addition to coolant, air, oil and latent materials,
It is mentioned that any other known suitable material can be used as the heat extraction medium.

According to the experience of experiments carried out with latent materials, mainly
This latent (solid-liquid phase change) heat storage material became a problem.
Its melting temperature is below 200°C, and it has a high heat of melting.
Moreover, it maintains its chemical stability even at 350°C. Another requirement is good crystallization properties, ie such that crystallization begins when the phase change temperature is reached during the cooling process and thus recovers the heat stored in the required temperature range. In addition to the above materials, the following materials can be used as such materials. NaoH-Ko) whose melting temperature is 150°C or 140'C
KNOi NaNO2HTS has a melting temperature of .

[Brief explanation of the drawings] Fig. 1 is a diagrammatic representation and connection diagram of the thermal storage heater of the present invention that can be used in buses; Fig. 2 is a vertical sectional view of the heat storage device as a detail of Fig. 1; Fig. 3 is a comparison. FIG. 4 is a longitudinal sectional view of an embodiment showing an example of the heat storage device of FIG. 2, and FIG. 5 is a second example. A connection diagram of the heat storage device of the present invention; FIG. 6 is a longitudinal sectional view of the heat storage device as a detail of the device of FIG. 5, drawn on a relatively large scale; FIG. Figure 8 is a cross-sectional view taken along the line ■■ of Figure 7, Figure 9 is a cross-sectional view taken along the line ■■ of Figure 7.
FIG. 1O is a cross-sectional view of the heat exchanger of the heater of FIG. 5, drawn to a relatively large scale and shown partially cut away; Note that the same parts are indicated by the same reference numerals throughout the drawings. DESCRIPTION OF SYMBOLS 1... Exhaust pipe, 3... Silencer, 5... Heat storage device, 7... Inlet, 9... Heat pipe, 12... Fin, 14... Housing, 17... Outlet stub, 23... Feed conduit, 26... Heater 28, 29... Heat sensor, 37... Heat exchanger, 41.42... Conduit, 45... Switching valve, 47...・Outlet, pump, 2... Coolant circulation port 4... Coolant circuit, 6... Switching valve, 8... Outlet, 10.11... Pipe, 13... Heat storage material, 16 ... Inlet stub, 18 ... Central duct, 25 ... Return conduit, 27 ... Check valve, 33 ... Heating pipe, 38 ... Pump, 44.48 ... Fan, 46 ...Conduit, 50...Inlet, 51...Switching valve. Engraving of drawings (no changes to content)

Claims (13)

[Claims] 1. In a device for heating a motor vehicle, in particular a bus driven by an internal combustion engine, having a heat storage connected in a heat transfer manner to the exhaust pipe of the engine and, in a given case, to the space of the vehicle to be heated. , a heat storage (5) is connected in series with the extended coolant circuit (4) of the engine (M) - and with an arrangement of heat exchangers (37) if an additional heat extraction medium is used, and A heating device characterized in that a circulation pump (24), which is operated independently of the engine (M), is integrated in the extended coolant circuit (4). 2. The inlet stub (16) and the outlet stub (17) of the regenerator (5) configured for the heat transfer medium form the feed conduit (23) and the return conduit (25) forming the coolant circuit (4).
and furthermore a fuel filter (32) and/or at least one heater (of the vehicle space to be heated).
2. Device according to claim 1, characterized in that 26) is integrated - preferably across - into the return conduit (25). 3. The inlet (7) of the regenerator (5) configured for other media is connected to the exhaust pipe ( 3. Device according to claim 2, characterized in that the switching valve is connected to a thermal sensor (29) of the heat storage device (5) in a remotely controlled manner. 4. A conduit (23A) interconnecting the return conduit (25) and the feed conduit (23) is connected to the outlet stub (1) of the regenerator (5).
7) and the heater (26), and the conduit (23
4. Device according to claim 2, characterized in that A) is provided with a check valve (27). 5. A heat exchanger (37) is connected between the feed conduit (23) and the return conduit (25) forming an extension of the coolant circuit (4) of the engine (M) and configured for additional media. The inlet and outlet are the inlet stub (16) of the heat storage device (5).
and the outlet stub (17) via conduits (35, 36), a pump (38) being incorporated into the conduit (35) and remotely controlled by a thermal sensor (28) in the feed conduit (23). 2. A device according to claim 1, characterized in that the device is connected in such a way that 6. A heat exchanger (37) is connected between the feed conduit (23) and the return conduit (25) forming an extension of the coolant circuit (4) of the engine (M) and configured for an additional medium. The inlet (50) of the octopus heat exchanger is connected to the outlet of the heat storage (5) via a switching valve (51), and the outlet (47)
is connected to the inlet (7) of the regenerator (5) via the conduit (46) and the switching valve (45) incorporated in the exhaust pipe (1), and is further connected to the inlet stub (7) of the regenerator (5). 16) and the outlet stub (17) are interconnected via conduits (41, 42) with the space of the car to be heated and furthermore a fan (
4. Device according to claim 2 or 3, characterized in that a tube (48, 44) is integrated into each conduit (46, 41). 7. Insulating coating (15), inlet for one medium (7
) and outlet (8) and inlet stub (16) for other media
) and outlet stubs (17), heat pipes (9) are arranged in parallel at equal distances from each other, their central duct (18) leading to one side. connected in heat transfer with a medium (e.g. exhaust gas) and with another medium (e.g. coolant, oil) whose outer enclosure (pipe 10) is located in an isolated space (A) of the housing (14); 7. Device according to claim 1, characterized in that the device is connected to 8. The central duct (18) of the heat pipe (9) is connected to the heat storage (
5) directly connected to the inlet (7) and outlet (8) of the housing, and the outer enclosure of the heat pipe (9) being indirectly connected to the inlet stub (16) and the outlet stub (17); 8. Device according to claim 7, characterized in that it is connected to the space (A) of. 9. At least one inlet (7) and an outlet (8) of the regenerator (5) are surrounded by a space (A) of the housing (14) interconnected with an inlet stub (16) and an outlet stub (17). 7. Claims 1 to 6 characterized in that they are interconnected by two heating pipes (33) and further characterized in that the heat pipes (9) of this space (A) are arranged at a distance from the heating pipes (33). The device described in item 1. 10. 10. Device according to one of claims 7 to 9, characterized in that the heat pipe (9) is provided with at least one further internal space (8) which primarily accommodates a heat storage latent material. 11. The heat pipe (9) has an outer pipe (10) forming an outer heat transfer surface and at least one inner pipe (11) arranged inside the pipe (10), the outer pipe (10) and the inner pipe (11) there is located a space (B) for accommodating the heat storage material (13), furthermore the inner heat transfer surface of the inner pipe is connected to the medium-guiding duct (18).
11. A device according to claim 7, characterized in that it forms a. 12. An inner pipe (11) is arranged coaxially within the outer pipe (10) and these outer and inner pipes are interconnected by longitudinal fins (12), thereby creating several spaces for accommodating the heat storage material. 12. A device according to claim 11, characterized in that it forms a. 13. Several inner pipes (11) are arranged at a distance from each other and from the outer pipe (10).
12. The device according to claim 11, characterized in that it is arranged in 0).