DE1655069A1 - Heat exchanger for heating and cooling vehicles - Google Patents

Description

67/8 1735 F SOCISiEEg ⁷ ANONYMS OF USINES OHAUSSON

Heat exchangers for heating and cooling vehicles. Priority: France, March 10, 1967

The invention relates to heat exchangers for air conditioning vehicles, i.e. for heating and cooling the passenger compartment of these vehicles.

The invention particularly relates to such exchangers which have an elongate shape and are transverse to the Longitudinal axis of the vehicle are arranged, but nevertheless the heat diffusion uniformly along the entire exchanger should be guaranteed.

The invention relates in particular to an arrangement which enables a single exchanger in addition to achieving a uniform diffusion of heat or cold along the exchanger, that when using the

109833/0464

BAD ORfGtNAL

The lower section of the exchanger for heating the passenger compartment the same is preferably heated over the upper section, or in other words, that a warm air stream more on the feet of the passengers than blown against their head thereby improving comfort. At the same time, the heat exchanger according to the invention also allows cold diffusion when used as a cooling element to regulate so that the colder air is more on the head of the passengers than on their feet is directed, which also improves comfort.

The design according to the invention allows a liquid or a liquid to be condensed as the heating means at will Steam and, as a coolant, a pre-cooled liquid or a relaxed volatile liquid, e.g. a refrigerant, to use.

According to the invention, the exchanger has an elongated one Shape and extends transversely to the vehicle over the grassiest part of the width of the same, preferably in the area of its instrument panel, and has at least one line for the circulation of a warm flow medium and at least one conduit for circulating a cold fluid s on, which can optionally be put into circulation »whereby these lines with ribs or other common Elements for the diffusion of heat are combined, which are arranged so that the exchanger of two perpendicular to the direction of the lines directed air flows through which are heated in various ways so that the airflow blown on the passengers' knees is warmer than that which is blown on its head.

10 9 8 3 3/0454

BAD ORIGlNAU

The invention is explained below by way of example with reference to the drawing.

Pig · 1 is a side view of one of the present invention Heat exchangerβ.

Pig * 2 is a cross-section of a heat exchanger according to the invention that is disclosed in Pig. 1 shown type in large em standard.

Pig. 3 and 4 are the pig. 2 similar cross-sections of other exemplary embodiments of the invention.

In Pig. 1 shows a heat exchanger of great length which is intended for use in a motor vehicle in which it is arranged e.g. perpendicular to the longitudinal axis thereof in the portion thereof which is located near the interface between the hood and the instrument panel, the vehicle being intended for inclusion This exchanger is designed and for this purpose e.g. has a housing in which the outside air is either passed through the dynamic pressure is circulated when the vehicle is moving, or by a fan or turbine.

It is also possible to make the training so that the air of the passenger compartment of the vehicle returns into it Housing is returned through a set of appropriate flaps, as is already the case with vehicles.

The exchanger according to the invention has two tubes or tube groups a and t>, which are combined with ribs £ are which on both sides of side parts Jl, e. are covered, which direct the air, which the exchanger should flow through, namely in Fig. 1 in a to the character

109S33 / 0454

BATH

plane perpendicular direction. The tubes and the ribs can can be carried out in completely different ways, for which Fig. 2 to 4- show some possibilities. Likewise, the side panels d and e are optionally formed directly by the ribs, the ends of which are shaped so that they come together koaanen in contact, but these side parts can also be put on, and then through a metal strip or a strip of any material can be formed, which is simply glued or otherwise attached. Incidentally, in numerous cases it is advisable to use a strip made of a poorly thermally conductive material. e.g. plastic, so that the hot or cold units given off by the pipes and the ribs do not pass through the side panels d_ and et are transferred to the environment.

As already stated, according to the invention the exchanger work simultaneously as an air heater and as a cooler and, if necessary, also as a refrigeration evaporator. Therefor are different solutions in Pig. 2 to 4 shown.

According to Pig. 2, the ribs contain several pipe layers, e.g. three layers 1, 2, 3 'each of which e.g. contains three tubes 4, 5, 6, 4a, 5a, 6a, 4b, 5b, 6jb. As shown in the drawing, the exchanger is an opening 7 arranged opposite, which is provided in a panel 8, with which the exchanger by a flexible seal 9 is connected, which creates the seal between the panel and the side parts jl and £. The pipes of each layer are together at their ends, preferably outside the Ribs £, connected therewith by curved sections 10 and 11

109833/0454

BAD ORtOfNAt

the fluid flowing through each drilling layer all drilling this layer flows through »whereby at any input and The starting temperature of the fluid flowing through each pipe layer is the temperature of the tipping over the whole area of the exchanger is uniform - This ensures that that tfcee the! passengers as well as the driver of the vehicle a stream of warm or cold air at the same temperature receive"

According to Fig. 2 are on both sides of the exchanger, or at least on the one shown by the arrows f and f ^ Sense of flow of the air flowing through the exchanger downstream of the section of the same walls 12 and 12a arranged. Me in the direction of the arrows f ^ stromende Air is supplied to the upper portion of the passenger compartment of the vehicle, either to the windshield or through Air nozzles get blown onto the head of the driver and passengers. The air flowing in the direction of the arrows will be on the other hand, fed to the lower portion of the passenger compartment of the vehicle and to the pub se of the driver and passengers blown.

The layers 2 and 3 are preferably traversed by the warm flow medium, the amount of flow through which it flows Taps 14 and 15 is adjustable, while the shift 1 of the cold flow medium is flowed through, the flow rate of which is regulated by a cock 16. When the cold flow means is formed by a relaxed refrigerant, the tap 16 can be replaced by a pressure reducer. This in fluids flowing in the tubes of layers 2 and 3

109833/0454

It can be any warm liquid that was used to cool the engine, or a warm refrigerant that is to be condensed. Layers 2 or 3 can also be used with the warm liquid that cooled the engine, or the other To allow the xtt condensing refrigerant to flow through the layer »

It has been shown that layers 2 and 3 are expediently used for the circulation of the warm disinfectant because the lower part of the ribs is then preferably heated so that the air directed in the direction of the arrows f «is in any case the warmer air, which provides the best comfort of passengers corresponds, especially when the outside temperature is not very low and a small amount of warm Flow means through layers 3 and 2 or only through one if, on the other hand, carbonized air is to be blown into the interior of the vehicle, it is that it is preferably blown onto the heads of the passengers in order to increase the feeling of freshness.

3 shows a simplified embodiment in which two tubes 17f 17, a are used for the circulation of the warm flow, which are connected by a curved part 18 arranged diagonally with respect to the ribs. Likewise, two pipes 19 and 19ja are used for the circulation of the cold flow medium, which are also connected by a curved file 20 which, as in the case of pipes 1717a, is arranged diagonally with respect to the ribs. Furthermore, the central section of the ribs is provided with spacers 21 which are in alignment with the walls 12, 12a

109833 / OA54

lie. Furthermore, it is expedient that the spacer members 21 are bent from tears 22, which in the rope of the Rib are provided through which the upper tubes 17 & and 19 so that this part may be less effective in terms of heat exchange.

As shown in the drawing, the openings 22 form a screen which prevents the cable from transferring heat from one section of the rib to the other, and the spacers 21 serve, in addition to maintaining the spacing between the ribs, as air walls for the air which is on the Path of the arrows f., Or the arrows f _{2 should} flow

In this embodiment it is essential that

the warm flow medium is supplied through the pipe 17 and exits through pipe 17a, the amount of warm flow medium being regulated by a tap 23. It is then the lower section of the ribs, which is preferably heated, especially with low flow rates of the warm Flow means, and is the temperature difference between the fins at one and the other end of the exchanger low, since near the entrance of the pipe 17 a larger one Amount of heat from the lower section into the upper section of the fin through the imperfect barrier, which form the openings 22, since with these ribs the fluid flowing in the tube 17a is stronger than that in the the same pipe 17 flowing fluid is cooled, even in the vicinity of the bent rope 18. In the case of the cold fluid, which is to flow through the pipes 19, 19a is it

109833/0454. "

on the other hand, it is expedient to first pass it through the pipe 19 and then through the pipe 19a. When the exchanger is used to heat the passenger compartment of the vehicle, it is then the air flowing in the direction of the arrows f ^ which is heated more strongly, while when the exchanger is used to cool the passenger compartment of the vehicle it is the air flowing in the direction of the arrows f ^ which is more strongly cooled.

According to FIG. 3, the partition wall 12 is still in the made movable to direction indicated by arrow f, to if desired, the one flowing in the direction of arrows f or fg To be able to change the amount of air within wide limits.

In Fig. 4, the exchanger is designed differently, with the ribs e an outgoing from an edge, from a collar 25 bordered cutout 24 and from the other Edge outgoing, have cutouts bordered by collar 27. The cutout 24 is in the middle section the rib of the partition wall 12 is provided opposite, while the cutouts 26 are formed in the zones 28 and 28a of the rib which are on both sides of the cutout 24. A flat tube 30 is arranged in the cutouts 24 of the rib, which is internally provided with a manifold 31 which divides the interior of the pipe into three compartments 32, 33 and 34. The division 32 is used to prefer the warm fluid to the division 33 and less strongly to the division 34 to distribute. The compartments 33 and 34 are then traversed by different amounts of fluid, and the distribution The flow medium is used for the entire length of these departments maintained so that the heat diffusion along the whole

109833/0454

Exchanger is equitable. If the compartment 33 is traversed by a larger amount of warm air, the zone 28a of the hip is more heated than the zone 28, so that the air flowing in the direction of the arrow f «is stronger than that along the arrow 3 ^. flowing air is heated. The insulation of the two zones 28, 28a is further improved in that an extension 35 is provided upstream of the pipe 30, which is formed at the exit of an opening 36 cut out in the zone 28. To regulate the flow rate in the bore 30, a Hein η 37 is arranged, for example, upstream from this pipe.

The cutouts 26 provided in the zones 28 and 28a serve to accommodate tubes 38, which are also may be flat as shown and from the cold fluid should be flowed through. These pipes, although not always necessary, preferably become practical fed via two separate taps 39 and 40.

This arrangement allows one or the other of the zones 28, 28 a of the cold fluid Ribs are preferably cooled, so that the temperature of the cooling air streams flowing in the direction of the arrows f and fg can be regulated separately.

When executing according to Pig. 4 it can be expedient be the partition 12 in the direction of arrow f-j to make them mobile and also to improve heat diffusion from the ribs £ blinds or other deflectors 41 in the zones 28, 28a in that represented by the arrows f, and f « Sense of flow downstream from the cutouts

27 to be arranged.

109833/0454

Claims (10)

The patient is demanding 1.) Heat exchanger for heating and cooling a vehicle, characterized in that it has an elongated shape and extends in the transverse direction of the vehicle over most of the width thereof, preferably in the zone of the instrument panel thereof, and at least one line (3 ) for the circulation of a warm flow medium and at least one line (l) for the circulation of a cold flow medium, which can be switched on selectively, these lines being combined with Hippen (o) or other common heat diffusion members which are arranged so that the Exchanger is traversed by two currents of air perpendicular to the direction of the lines (f- ^ and fg), which in various ways become so - ^ - 4Ir: s * that the air current blown on the face of the passengers is warmer than that on the heads of the same blown airflow is. 2 ») exchanger according to claim 1, characterized in that the lines for the circulation of the warm and the cold flow means are arranged so that the diffusion of heat or cold over the entire length of the exchanger is practically uniform. 3.) Exchanger according to claim 1 and 2, characterized in that the lines for the circulation of the warm and the cold fluid with taps to regulate the Flow rate of these flow means are combined 4 ·) Exchanger according to claim 1 to 3 »thereby characterized in that the exchanger is combined with at least one partition (12) which faces in the direction of it 109833/0454 flowing through air currents in its downstream lying Section is arranged, and is located horizontally in the middle section of an opening (7), in front of which the exchanger is arranged 5.) Exchanger according to claim 1 to 4, characterized in that the upper and the lower side of the exchanger are provided with the air-conducting side parts (d, e) flowing through it. 6.) Exchanger according to claim 1 to 5 »thereby characterized in that the central section of the ribs of the exchanger has openings over at least part of its length (36), which delimit a partial thermal barrier which divides the hips into two thermally separated zones (28, 28a). 7 ·) Exchanger according to claim 1 to 6, characterized in that the flow 8 downstream from the exchanger arranged partition (12) for regulating the flow rate of the air streams flowing on both sides of its two sides along the Exchanger is movable. 8.) Exchanger according to claim 1 to 7, characterized in that the lines for the circulation of the warm and the cold flow means are formed by tubes arranged in superimposed layers (1, 2, 3). 9.) Exchanger according to claim 1 to 7, characterized in that the lines for the circulation of the warm and the cold flow means are each formed by at least two lines (17, 19), which through the ribs (c,) step in a diagonal arrangement, the circulation of the warm 109833/0454 Flow medium from the lowest lying pipe (17) to the highest lying pipe (17a.) And the circulation of the cold one Flow medium takes place from the highest lying pipe (19) to the lowest lying pipe (19.a). 10.) Exchanger according to claim 1 to 7 »characterized in that the line (30) for the circulation of the warm Fluid has inside a distribution member (31) which divides this line into three compartments, namely a middle distribution compartment (32), a preferred circulation compartment (33) in the lower section of the conduit, and a third compartment (34) for the lesser circulation in the upper portion of the conduit, this conduit approximately in the central portion of the ribs (c,) is arranged, with lines (38) for the circulation of the cold flow medium in on both sides of the line (30) for the circulation of the warm flow mini ttels lying zones (28, 28a) of the rib are arranged. 109833/0454 Lee rse 11 e