Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
  • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
  • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
  • F28D1/0443—Combination of units extending one beside or one above the other
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
  • F01P2003/185—Arrangements or mounting of liquid-to-air heat-exchangers arranged in parallel

Definitions

• the invention relates to the field of heat exchangers and in particular to heat exchangers intended to be traversed by a fluid.
• the invention relates more particularly to heat exchangers for motor vehicles requiring a low temperature loop or exchanger and a high temperature loop or exchanger; the low temperature exchanger being located coplanar to the high temperature exchanger.
• This type of heat exchanger 30 is currently known on the market in which a connection 37 between the low temperature exchanger 31 and the high temperature exchanger 32 is effected by means of a hose 37, that is to say a hose. reported means, generally in the form of a plastic conduit, linking the outlet manifold 35 of the high temperature portion 32 to the inlet manifold 36 of the low temperature portion 31.
• This type of solution illustrated in FIG. 1, has the major disadvantage of requiring a complementary portion 37 to be fixed to the two heat exchangers or to the two heat exchange parts 31 and 32.
• this complementary portion 37 is likely to leak.
• the material used for this complementary portion 37 is either relatively flexible plastic to adapt to all types of configurations of the engine block and in particular according to the arrangement of the high temperature exchanger 31 with respect to the low temperature exchanger 32, the hose 37 is made of rigid material and therefore with a well-defined shape.
• the connection of the hose 37 with the two collectors 35, 36 of each of the heat exchangers 31, 32 is relatively easy but it is particularly fragile and likely to deteriorate rapidly.
• the hose 37 is resistant but then its connection with each of the two collectors 35, 36 is particularly difficult and the risk of leakage at these particularly important connection locations.
• Heat exchangers 30 are also known on the market, associating a high temperature part 31 with a low temperature part 32, the exchanger 30 having a unified structure in which the width and thickness dimensions for these two heat exchange parts 31, 32 are strictly identical. This type of structure is illustrated by the two figures 2a and 2b appended.
• the high-temperature part 31 still lies above the low-temperature part 32 so that it is still possible to allow the fluid to pass from the outlet manifold 33 of the high-temperature part 31 at the inlet manifold 34 of the low temperature portion 32.
• the object of the invention is in particular to overcome the disadvantages of the aforementioned heat exchangers by proposing a heat exchanger, of the type mentioned above, allowing the high temperature part to be put in place below the low temperature part.
• a heat exchanger for high and low temperature fluid comprising a bundle of tubes connecting the outlet / fluid inlet manifolds for at least one high-temperature part and at least one low-temperature part, said two parts:
• this fluid first traveling the high temperature part and then the low temperature part, and
• the structure of the exchanger according to the invention is such that the high temperature portion is located below the low temperature portion. Since the fluid flowing through the exchanger, and therefore the two high and low temperature parts, is unique, and this fluid first flows through the high temperature part and then the low temperature part, the fluid inlet into the exchanger of heat according to the invention is made / located in the lower part of said exchanger, namely here in the part to high temperature, and the fluid outlet in the heat exchanger is made / located in the upper part of said exchanger, unlike what exists in the prior art ⁇ and illustrated in Figure 2).
• the invention in addition to the structure of the exchanger (in particular the particular top-bottom positioning of the two parts and that of the fluid inlet / outlet in the heat exchanger), the invention relates to the use of such a heat exchanger characterized in that the high temperature portion is located below the low temperature portion.
• connection / direct attachment between the outlet manifold of the high temperature part and the inlet manifold of the low temperature part is provided by means of communication from the outlet manifold of the high temperature part and / or the inlet manifold of the low temperature part, that is to say from material of one and / or the other of these two elements.
• this means of communication consists of a dip tube or a similar device in its function, namely to ensure the transport of liquid fluid (and almost completely liquid, without bubble or gas) from the first part of the heat exchanger to his second part,
• the two parts are traversed by the same fluid means that these two parts, low and high temperature, are traversed by the same fluid which passes first by one of these two parts then by the other, classically firstly by the high temperature part then by the low temperature part.
• the term "the outlet manifold of the high temperature part is directly connected to the inlet manifold of the low temperature part” means that these two collectors are connected to each other without any intermediate, the or the means allowing the connection between these two collectors being conventionally derived from material during the manufacture / formation of each of these two collectors.
• the present invention avoids any engazement during the passage of the fluid from the high temperature part to the low temperature part despite the positioning of the low temperature part above the high temperature part.
• the high temperature part is positioned below the low temperature part, it being understood that the above-below positioning is determined by the fact that the fluid rises from the high temperature part to the low temperature part, at the same time. against the force of gravity.
• This positioning can also be defined by the positioning of the heat exchanger in the engine block, the high-temperature part then being located above (relative to the notion of altitude relative to the terrestrial ground) of the low part. temperature.
• the inlet manifold of the low temperature part comprises a dip tube
• the outlet manifold of the high temperature portion comprises a sleeve or sleeve for receiving said dip tube; the outlet manifold of the high temperature part is connected by clipping to the inlet manifold of the low temperature part;
• the sheath or sleeve comprises means for isolating the outlet manifold of the high temperature portion of the inlet manifold of the low temperature portion; said means consists of a partition extending perpendicularly to the longitudinal axis of said sheath or sleeve;
• the high temperature part has the same width and the same thickness as the low temperature part
• the high-temperature part has a width and a thickness different from that of the low-temperature part
• the outlet manifold of the high temperature part is connected by riveting, screwing and / or clipping to the inlet manifold of the low temperature part.
• Figure 1 illustrates an embodiment of a heat exchanger according to the prior art in which the high temperature part and the low temperature part are separate and connected by a tube or hose;
• FIG. 2 illustrates another type of heat exchanger embodiment according to the prior art with two variants for each of these two figures
• FIG. 3 is a perspective view of an embodiment of a heat exchanger according to the invention in which the two parts are distinct and of different dimensions from each other;
• FIG. 5 is a perspective view of another embodiment of a heat exchanger according to the invention in which the two parts have the same dimensions at least in thickness and width;
• FIG. 6 illustrates an enlarged view of the heat exchanger of Figure 5 at the outlet manifold of the high temperature part connected to the low temperature part.
• the fluid flowing in the tube bundles of each of the parts, at high and low temperature is intended to be swept by the same air flow which sweeps the beam generally perpendicularly to the plane of the heat exchanger.
• the heat exchangers 30 shown in FIGS. 1 and 2 are heat exchangers 30 according to the prior art and comprise, like the heat exchangers 1, 2 according to the invention, represented in FIGS. 3 to 6, two parts, high 3 and low 4 temperature.
• Each of these high and low temperature portions 3 comprises a fluid inlet manifold 5, 6 and a fluid outlet manifold 7, 8 and a tube bundle or the like 9, 10 for the exchange of fluid. heat between the
• RECTIFIED SHEET (RULE 91) ISA / EP fluid flowing in these bundles of tubes 9, 10 and a circulating fluid, typically air.
• These heat exchange bundles 9, 10 here consist of tubes between which are arranged / fixed fins or disrupters, not visible in the accompanying figures, for disrupting the air flow to achieve a better heat exchange.
• the bundles of tubes 9, 10 are conventionally fixed respectively to the inlet manifolds 5, 6 and outlet 7, 8 via the ends of tubes.
• the fluid flowing in the tubes 9, 10 is engine coolant and that the tubes of the bundles 9, 10 are flat tubes, but it will be understood that the invention is not limited to these modes. and that any type of fluid can be envisaged with the invention as all types of heat exchangers, for example including plates, tubes, collectors consist of one or more parts and all having geometric shapes .
• the collectors 5, 6, 7, 8 of the heat exchanger 1, 2 consist of a collector plate fixing the ends of the tubes of the exchange bundle and a cover; these two plate collector / cover forming the collector of the invention.
• the collector plate is conventionally made of metal while the cover is ideally plastic but it can also provide all-metal collectors.
• the heat exchanger I 7 2 may be plastic, preferably the inlet manifold 6 of the low temperature part 4, while at least the inlet manifolds 5 and outlet 7 of the high temperature portion 3 will be metallic.
• the heat exchanger 1 shown in FIGS. 3 and 4 has a high temperature portion 3 of dimensions much greater than those of the low temperature portion 4. Indeed, the beam exchange surface 9 of the high temperature portion 3 is substantially between 3 and 5 times greater than the exchange surface of the beam 10 of the low temperature portion 4.
• the inlet manifold 5 of the high temperature portion 3 comprises a pipe 11 of a diameter also much greater than the diameter of the tubing 12 of the outlet manifold 8 of the low temperature part 3.
• the outlet manifold 7 of the high temperature portion 3 comprises a pipe 13 which may ideally be of a diameter smaller than the diameter of the pipe 11 of the inlet manifold 5 because the quantity of fluid flowing through the pipe of the outlet manifold 7 is less than that entering through the manifold 11 of the inlet manifold 5; the difference being constituted by the fluid flowing in the low temperature portion 4 of the heat exchanger 1.
• the width as well as possibly the thickness of the low temperature portion 4 is / are lower than that (s) of the high temperature portion 3.
• the inlet manifold 6 of the low temperature portion 4 comprises a circular tube or plunger nipple 14 located in its lower part facing or near the outlet manifold. 7 of the high temperature part 3, while the outlet manifold 7 of the part at . high temperature 3 has a cylindrical orifice 15 of complementary shape to that of the plunger nib 14 so that the latter 14 fits inside said orifice 15.
• the function of the cylindrical orifice 15 serves to prevent the engazement of the fluid during its passage from the high temperature portion to the low temperature portion.
• this cylinder or tube 15, of cylindrical shape or any other linear forms the formation of bubbles in the fluid passing from the high temperature portion to the low temperature portion is prevented.
• the orifice, sheath or sleeve 15, is here composed of two parts, one upper 15 'having a diameter substantially equal to the diameter of the aforesaid circular tube 14 and the other lower 15' 'having a diameter smaller than the diameter of said tube circular 14 or said portion 15 'so that the circular tube 14 abuts this lower portion 15' '.
• the lower part 15 '' of the circular orifice 15 opens in its lower part in an open chamber 16 adapted to store a portion of the fluid entering the outlet manifold 7 of the high temperature portion 3 to then circulate through this orifice 15 then in the circular tube 14 to arrive in the inlet manifold 6 of the low temperature part 4,
• the circular tube 14 here comprises at least one side plate 17 having orifice (s) intended (s) to allow a fixing by screwing 18.
• This fixing by screwing / riveting 18 constitutes a complementary fixation and optional to the fitting of the circular tube 14 in the orifice 15, this fitting making a fixation by clipping for example to a peripheral groove 19 present on the circular tube 14 and intended to accommodate a protuberance 20 also peripheral and extending vis-à-vis from the orifice 15.
• the section of the plunging tube 14 and that of the orifice 15 are here circular, but it is understood that all shapes and dimensions can be provided insofar as the portions of the tube 14 and of the sleeve 15 intended to cooperate with each other. are adapted to interconnect.
• Figures 5 and 6 show a second embodiment of a heat exchanger according to the invention.
• the structure remaining substantially identical with the exception that the two parts, high 3 and low 4 temperature, have identical dimensions, especially in width and thickness, which allows to perform two single collectors 21, 22 each of these two collectors 21, 22 being subdivided into two to form respectively the inlet manifold 5 of the high temperature portion 3 and the outlet manifold 8 of the low temperature portion 4 for the one 21 and the collector 7 of the high temperature portion 3 and the inlet manifold 6 of the low temperature portion 4 for the other 22.
• the tube 14 of the inlet manifold 6 of the low temperature portion 4 is not necessarily pushed into the sleeve / sleeve 15 of the outlet manifold of the high temperature portion 3 and it is sufficient that the opening of the tube 14 coincides with the opening of the sleeve / sleeve 15 so that the fluid actually passes. from one 3/7 to the other 4/6, as can be seen in FIG. 6.
• the separation between the outlet manifolds 7 and inlet 6 respectively for the high-temperature part 3 and the low temperature part 4 is made by means of a partition 23 extending ideally from the end of the tube 14 or the sheath / sleeve 15, here from the sheath / sleeve, to one or more wall (s) of the single collector 22.
• the heat exchanger I 1 2 fulfilling the same functions as conventional heat exchangers, its structure is not different and does not exclude or require any element / part, such as the expansion cheeks disposed at both ends of the bundle of tubes or the means or studs for fixing the heat exchanger in the engine block.
• the invention also relates to the production of a high temperature / low temperature exchanger, illustrated in FIGS. 5 and 6, in which the collector plate and the cover, forming the collector of the invention, are common to the two upper and lower parts. low temperature.
• the collector 21, comprising a single cover and a single collector plate, is used for the collector plate and the cover respectively the inlet manifold of the high-temperature part 3 and the outlet collector of the low-temperature part 4
• the collector 22, also comprising a single cover and a single collector plate is used for the collector plate and the cover respectively of the outlet manifold of the high-temperature part 3 and the inlet collector of the low-temperature part 4.
• the two collectors 21, 22 form the inlet / outlet manifolds of the high temperature part 3 and the low temperature part 4.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Applications Claiming Priority (2)

Publications (2)

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• 2007
  • 2007-10-23 FR FR0707404A patent/FR2922637B1/fr not_active Expired - Fee Related
• 2008
  • 2008-09-19 EP EP08804464.9A patent/EP2208010B1/de active Active
  • 2008-09-19 WO PCT/EP2008/062530 patent/WO2009053182A1/fr active Application Filing

Non-Patent Citations (1)

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