ITMI20080749A1 - DEVICE FOR HEAT TRANSMISSION - Google Patents

Description

Description of the industrial invention entitled:

"Device for heat transmission"

Summary of the finding

The invention relates to a device for heat transmission, in particular a cross-flow cooler for a vehicle having a heat transmission area, in particular a cooling / fin network and at least two collector / distribution vessels (6, 6 ' ) in the area of the side members of the vehicle arranged laterally to the heat transmission area extending substantially vertically. At least one collector / distribution vessel comprises a first distribution zone (8, 8b) and a second distribution zone (8a, 8c) which are hydraulically connected by means of an external connection duct equipped with a connection for the supply of refrigerant fluid or a connection for the discharge of refrigerant fluid.

(Figure 1 )

Description of the finding

The invention relates to a heat transmission device, in particular a cross-flow cooler for a vehicle, according to the preamble of claim 1.

When a heat transfer device is normally mounted centrally between the side members of a vehicle, the achievable size of the heat transfer device is essentially defined by the mutual distance of the side members, one franc from the ground and the height. of the hood. The positions of the side members are substantially determined by the space requirement of the engine and by the enveloping surfaces of the steered wheels. The clearance with respect to the ground, or the position of the vehicle above the carriageway, is defined by the concept of the vehicle or by functional requirements to avoid, for example, trailing in the parking garage. In the end, as a variable, to create the necessary surfaces for the transmission of heat, one can only vary the height of the device for the transmission of heat and therefore the contour of the! hood. In particular, in the case of sports vehicles and with regard to the protection of pedestrians, however, it is desirable to keep an upper edge of the device for transmitting heat low. However, this conflicts, especially in the case of a vehicle with a high-power engine, with the large cooling requirement.

From document US 5 236 336 a heat exchanger is known which does not form a continuous heat transmission plane but in which the heat transmission unit formed here by lamellae forms several planes for the transmission of heat shifted in steps one with respect to the 'other. Thanks to the stepped arrangement, the aim is to make better use of the space in the engine compartment of a vehicle in particular.

The present invention is confronted with the problem of providing a device for the transmission of heat which efficiently exploits the maximum possible or existing width between the longitudinal members of the vehicle in order to reduce, in the presence of a predetermined surface for the transmission of heat, the construction height of the heat transfer device.

This problem is solved, according to the invention, through the object of independent claim 1. Advantageous embodiments are the subject of the independent claims.

The invention is based on the general idea of dividing at least one collector vessel / distributor vessel of a heat transfer device, for example of a cross-flow cooler for a vehicle, into a first distribution zone (8, 8b) and in a second distribution area (8a, 8c) connected hydraulically by means of an external connection conduit equipped with a connection for the supply of the refrigerant fluid or a connection for the discharge of refrigerant fluid. The heat transfer device is not limited to a cross flow chiller but is also suitable for all possible chillers, for example for falling flow chillers.

The heat transfer device has a heat transfer area, for example a cooler / fin network in which at least two collector / distribution vessels are arranged which extend laterally and substantially vertically.

The first distribution zone can be a section located at the top of the collecting / distribution vessel and the second distribution zone can be a section located at the bottom of the collecting / distribution vessel.

The connection of the flexible pipes for the cooling water, for the supply and / or return duct takes place in the connection duct of the two collector / distribution vessels.

By means of the external connection ducts, the width of the lateral collector / distribution vessels can be kept as low as possible since the connections do not have to be provided directly in the collector / distribution vessel. Furthermore, the external connection ducts ensure the necessary distribution of the refrigerant fluid to the distribution areas of the collector / distribution vessel.

According to a preferred configuration of the solution according to the invention, an external contour of the device for heat transmission arranged between two side members of the vehicle is adapted to the side members of the vehicle in such a way as to form an integration of the shape of the vehicle side members in the external contour.

In this way, the width of the construction space between the side members of the vehicle can be used efficiently.

According to another preferred configuration of the solution according to the invention, the collector / distribution vessels arranged laterally each have a recess of configuration complementary thereto in the area of the side members of the vehicle so that the surface for the transmission of heat can almost cover the full width between the side members of the vehicle. Thanks to this enlarged surface for the transmission of heat, its height can be reduced for the same area requirement and thus, for example, a sporty exterior contour of the vehicle can be created. At the same time, the reduced height of the heat transfer device is favorable with regard to future needs for the protection of pedestrians. The recess in the lateral collector / distribution vessels can thus be chosen of such dimensions that a residual section of the collector / distribution vessel in the recess area allows a necessary exchange of refrigerant fluid between the first and second distribution areas. Lateral collector / distribution vessels thus surround the vehicle side member in the recess area and continue above and below it so that the surface for heat transmission located between the lateral collector / distribution vessels can be made of greater width. .

According to a particularly preferred embodiment of the solution according to the invention, when the device for transmitting heat is mounted in the vehicle, the longitudinal members of the vehicle are immersed, at least in part, in the complementary recesses of the collector / distribution vessels.

In this way, it is obtained to arrange the two collector / distribution containers substantially above and below the longitudinal members of the vehicle, thus obtaining that an area between the two longitudinal members of the vehicle can be used almost exclusively from the area for the transmission of the vehicle. heat. Such a heat transfer zone is considerably larger than in heat transfer devices. traditional warmths placed completely between the side members of the vehicle. Other important characteristics and advantages of the invention are derived from the secondary claims, from the drawings and from the description of the figures relating to the drawings.

It is understood that the characteristics mentioned above and which will be illustrated in the following can be used not only in the combination indicated but also in other combinations or even alone without abandoning the framework of the present invention.

Preferred examples of embodiments of the invention are shown in the drawings and will be illustrated in more detail in the following description in which like reference numbers indicate identical or similar or functionally identical components. Therefore:

Figure 1 shows a strongly schematic representation of a heat transfer device according to the invention,

Figure 2 shows a strongly schematic representation of another embodiment of the device for the transmission of heat according to the invention,

Figure 3 shows a strongly schematic side view of a heat transfer device according to the invention,

Figure 4 shows a strongly schematic representation of another embodiment of the heat transfer device according to the invention.

Figure 1 shows a position of a heat transfer device 1 according to the invention in which it is arranged in the center between two longitudinal members 2 and 2 'so that a feasible size of the heat transfer device 1 arranged lying down is defined substantially from the distance between the two longitudinal members 2, 2 ', from one clearance with respect to the ground and from a height of the hood. The position of the longitudinal members 2, 2 ’of the vehicle is essentially established by the space requirement of an actuation device not shown and by enveloping surfaces 3 of steering wheels also not shown.

In order to be able to optimally exploit the space between the two side members 2, 2 'of the vehicle or, with a predetermined size of the heat transmission surface 4, to keep an upper edge 5 of the heat transmission device 1 as low as possible, an external contour of the heat transfer device 1 should be adapted as exactly as possible to the internal dimensions of the available construction space. At least two collector / distribution tanks 6, 6 'arranged laterally in the heat transmission area 4 and extending substantially vertically, each can have externally, in the area of the side members 2, 2' of the vehicle, grooves 7 complementary to them. Such a recess 7 causes a section of the collector / distribution vessel 6, 6 'to be strongly restricted in the area of the recess 7. The recess 7 therefore determines in the collector / distribution vessel 6 that this is divided into a zone 8 located above the recess 7 and in an area 8a located below the recess 7. Similarly, the recess 7 'divides the collector / distribution vessel 6' into an area 8b located above the recess T and in an area 8c located below.

To convey a refrigerant medium to zones 8 and 8a, an external connection duct 9 can be arranged in the area of the recess 7 in the collector / distribution vessel 6, connecting the area 8 located above the recess 7 with the area 8a located below the recess 7. The connection of the flexible cooling water supply hose also takes place on the connection duct 9 of the two halves 8, 8a of the box. To convey refrigerant fluid coming from zones 8b and 8c, an external connection duct 9 'can be arranged in the collector / distribution vessel 6' in the region of the recess T, connecting the area 8b located above the recess 7 'with the zone 8c located below the recess 7 '. The connection of the coolant water discharge hose 19 also takes place on the connection duct 9 'of the two halves of the box.

The heat transmission device 1 can be divided into a heat transmission section 10 located above the recess 7 or T as well as a heat transmission section 10 'located below, comprising each heat transmission section 10, 10 'a supply conduit 11 or 11' and an exhaust conduit 12 or 12 '.

As shown in Figure 1, the heat transmission device 1 is basically configured as a cross flow cooler whereby a heat transmission fluid crosses, substantially horizontally, the heat transmission zone 4 starting, for example for example, from a collector / distribution vessel 6 and subsequently reaches the collector / distribution vessel 6 '.

In order to increase the functionality of the device for the transmission of heat 1, the section of the connection duct 9 or 9 'can be configured in such a way as to obtain different flows through the supply duct 11 and 11' and / or the exhaust duct 12 , 12 '. On one side of the attachment 14, for example, a narrowing 21 can be provided in the connection duct 9 so that the flow in the section 8a located below the recess 7 and passing through the heat transmission section 10 'located below, is less than the flow in the section 8 located above the recess 7 and passing through the heat transmission section 10 located above. In this case, the coolant, which is conveyed to the heat transfer area 4 via a distribution area (8, 8a) of the collector / destruction vessel 6, is cooled more strongly than the coolant fluid due to a smaller passage. , through the other distribution zone (8, 8a) of the collector / distribution vessel 6, it is conveyed to the heat transmission zone.

A difference between the flow through the heat transmission section 10 and the heat transmission section 10 'can be advantageous if, in order to optimize the overall efficiency, it becomes necessary to distribute different quantities of water through heat exchangers placed before of the cooler (which then release heat) such as a refrigerant condenser, a steering auxiliary cooler, a transmission oil cooler, a charge ana cooler, and so on and then distribute the cooling power in the water cooler . Figure 3 shows a schematic side view of a heat transmission device according to the invention. The heat exchangers 15, 16 are arranged before the cooler.

The heat exchangers 15, 16, due to different heat transfers, heat the air at different temperatures. Due to the different flow of water crossing the heat transmission section 10 and the heat transmission section 10 ', the different temperatures of the air are compensated for which can increase the overall efficiency.

Furthermore, according to the invention, the subdivision of the quantities of water on the supply ducts 11 or 11 'can be carried out so that they are different in accordance with the inflow air ratios. The inflow air ratios also depend on the configuration of the front sections of the vehicle. Therefore, there is an adjustable subdivision of the quantities of water that can be obtained by, for example, an adjustable throttling or by means of the water inflow sections to the supply ducts 11 or 11 '. An adjustable throttling can also be assumed by installing an adjustable valve inside the supply ducts 11 or 11 ',

In order to increase the functionality of the heat transfer device 1 or to be able to expand its field of use, at least one of the collector / distribution vessels 6, 6 'can have a separation segment 13, 13' which hydraulically separates the section 8, 8b located above in relation to section 8a, 8c located below. Preferably the separation segment 13, 13 'is located in the area of the recess 7, T.

As shown in Figure 2, the collector / distribution vessel 6 is hydraulically divided, by means of the separation segment 13, into the previously mentioned portions so that a different crossing of the device for heat transmission 1 is obtained with respect to Figure 1. In figure 2 through the supply duct 11 the refrigerant fluid flows to the upper heat transmission section 10 and passes through this from left to right up to the section 8b of the collector / distribution vessel 6 '. The refrigerant fluid flows in a similar way, through the supply duct 11 ', to the lower heat transmission section 10' and passes through it from left to right up to section 8c of the manifold / distribution vessel 6 '. As shown in Figure 2, both the collector / distribution vessel 6 and the collector / distribution vessel 6 'in the corresponding region of the recess 7, 7' can have a separation segment 13 or 13 'whereby the transmission section of the heat 10 is hydraulically separated from the heat transfer section 10 '. This allows you to better adjust the flow through the heat transmission section 10 and the heat transmission section 10 '.

Figure 4 shows a development of the device for the transmission of heat represented in Figure 2 in which the connection duct 9 ', on the return side, is replaced with two return connections, each of which is arranged on the return side of the section 8b placed above the recess T and the section 8c located below the recess 7 '. By virtue of the different flow in sections 10, 10 ', differently cooled refrigerant fluid can be conveyed in a targeted manner to cool certain systems. A water-based oil refrigeration works better from a thermodynamic point of view if an inlet temperature has a greater temperature difference while the cooling water for a drive device works better from a thermodynamic point of view if it has a smaller temperature difference. . The position of the outlets 17, 18 is shown only by way of example so that other directions of crossing are also included with it by the invention.

When the heat transfer device 1 is mounted in the vehicle, the position of the connections in the connecting duct 9, 9 'allows a reduction in the width of the collector / distribution vessel which also means that the heat transfer area may have a greater width. When the heat transfer device 1 is mounted in the vehicle, the longitudinal members 2, 2 'of the vehicle are further immersed, at least in part, in the recess 7, 7' which means that the heat transmission area can have a width greater.

With a predetermined size of the surface of the heat transfer area, its height can thus be reduced.

The previous description of the embodiments according to the present invention serves only for illustrative purposes and not to limit the invention. In particular, with regard to some preferred embodiment examples, the specialist can deduce from it that various modifications and variations in form and details can be made without departing from the idea and scope of the invention. Correspondingly, the illustration of the present invention must not be construed in a limiting sense. Rather, the illustration of the present invention must highlight the scope of the invention illustrated in the following claims.

Claims (10)

Claims 1. Heat transfer device (1), in particular cross-flow cooler for a vehicle, - having a heat transfer area (4), in particular a cooling / fin network, and - at least two collector / distribution vessels (6, 6 ') arranged laterally in the heat transmission zone (4) and extending substantially vertically in the area of the side members (2, 2') of the vehicle, characterized in that at least one vessel manifold / distribution (6, 6 ') comprises a first distribution zone (8, 8b) and a second distribution zone (8a, 8c) which are hydraulically connected via an external connection duct (9, 9') equipped with an attachment (20) for the supply of refrigerant fluid or an attachment (19) for the discharge of refrigerant fluid. 2. Heat transmission device according to claim 1, characterized in that the collector / distribution vessels (6, 6 ') each comprise a first distribution zone (8, 8b) and a second distribution zone (8a, 8c) which distribution zones (8, 8a) of a manifold / distribution vessel (6) are connected hydraulically by means of the external connection duct (9) equipped with the connection (20) for the supply of refrigerant fluid and the zones (8b, 8c) of the other manifold / distribution vessel (6 ') are connected hydraulically, by means of the! external connection duct (9 ') equipped with the attachment (19) for the discharge of the refrigerant fluid. 3. Heat transfer device according to claim 1, characterized in that at least one distribution collector vessel (6, 6 ') has a separation segment (12, 13') which sealingly closes the first distribution (8, 8b) with respect to the second distribution zone (8a, 8c). 4. Heat transfer device according to claim 1, characterized in that a section of the connecting duct (9, 9 ') is configured in such a way that a quantity of refrigerant fluid is specifically conveyed to the respective distribution area ( 8, 8b). 5. Device for the transmission of heat according to claim 1, characterized in that a narrowing (21) is provided in the connection duct (9) on one side of the attachment (20). 6. Device for heat transmission according to claim 1, characterized in that the device for heat transmission is arranged between two longitudinal members (2, 2 ') of the vehicle presenting each collector / distribution vessel (6, 6') externally, in the area of the side members (2, 2 ') of the vehicle, a recess (7, 7') configured accordingly. 7. Heat transfer device according to claim 6, characterized in that in at least one of the collector / distribution vessels (6, 6 '), a connecting duct is arranged in the region of the recess (7, 7') which connects a portion (8, 8b) located above the recess of the collector / distribution vessel (6, 6 ') with a portion (Sa, 8c) located below the recess. 8. Heat transfer device according to claim 7, characterized in that each distribution zone (8b, 8c) of one of the connector / distribution vessels is equipped with an attachment (17, 18) for the discharge of refrigerant fluid . Heat transfer device according to one of the preceding claims, characterized in that the refrigerant fluid which is conveyed to the heat transfer zone (4) via a distribution zone (8, 8a) of a collector / distribution vessel 6, due to a lower flow, more of the refrigerant fluid is cooled, which is conveyed to the heat transmission zone 4 through the other distribution zone (8, 8a) of the collector / distribution vessel. Heat transfer device according to one of the preceding claims, characterized in that, when a heat transfer device (1) is mounted in the vehicle, the side members (2, 2 ') of the vehicle are submerged, at least in part, in the complementary recesses (7, 7 ').