Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
  • F28F9/0224—Header boxes formed by sealing end plates into covers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/0246—Arrangements for connecting header boxes with flow lines
  • F28F9/0256—Arrangements for coupling connectors with flow lines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
  • F28F9/0263—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry or cross-section of header box
• • 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
  • F28D1/053—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 the conduits being straight
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2275/00—Fastening; Joining
  • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
  • F28F2275/122—Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching

Definitions

• Fluid collector box for heat exchanger, associated heat exchanger.
• the present application relates to a fluid manifold for a heat exchanger, and a heat exchanger equipped with such a device, and more particularly in applications to devices for heating, ventilation and / or air conditioning.
• Some of these heat exchangers comprise a plurality of tubes allowing a thermal energy exchange between a fluid flowing inside the tubes and a fluid flowing between the tubes.
• the tubes are connected to manifolds whose function is respectively to distribute or collect the fluid at the ends of the tubes, depending on whether the box is upstream or downstream of the heat exchanger.
• Each manifold is fluidly connected to a heat loop through one or more openings.
• the manifold can fluidly connect all the tubes by limiting the number of connections at the loop, which in particular limits the risk of leaks.
• the tubes are arranged so as to be parallel to each other, to promote heat exchange with their environment while optimizing their size. This implies that the openings in the bottom of the header, intended to communicate fluidly with the tubes, are also aligned. This has the disadvantage of requiring the fluid to spread all along the box to ensure the supply of all tubes. This divergent flow of the liquid in the upstream collector box imposes turbulent flow on the fluid, causing a loss of charge as it passes through the collector box. It is understood that the same phenomenon of pressure drop occurs when the fluid passes through the manifold downstream, due to its flow converging towards the opening connected to the thermal loop of the heating, ventilation and / or air conditioning.
• the present invention aims to overcome these disadvantages by providing a fluid collection box for a heat exchanger limiting the phenomenon of loss of charge of a fluid passing through the box.
• the present invention proposes a fluid collection box for a heat exchanger, in particular in a heating, air conditioning and / or ventilation device for a motor vehicle, comprising a receptacle delimited by at least one side wall and one wall. bottom comprising a plurality of first openings substantially aligned in a direction of extension of the box.
• a box according to the invention comprises a bottom and at least one side wall, preferably substantially normal to said bottom, so as to collect at said bottom, a coolant or heat transfer fluid according to the needs of the heat exchanger, said fluid being adapted to pass through the bottom wall through the first openings.
• the receptacle In order to temporarily store the fluid in the box, the receptacle is closed by a lid having at least a second opening, for receiving a supply conduit adapted to be connected to the box to communicate fluidly with the receptacle and further downstream the heat exchanger.
• the invention is characterized in that at least a second opening of the lid has an elongated shape substantially in the direction of elongation, and in that this second opening is arranged vis-à-vis several first openings.
• the inlet surface of the fluid is extended in the receptacle and the distribution of this fluid is spread out, so that a substantially linear flow of this fluid is allowed through the collecting box, between a second opening and several first openings, and that thus limiting the fluid loss phenomenon described above.
• elongated shape means an opening comprising at least two dimensions of different values, the largest dimension of which defines the direction of this elongated shape.
• the largest dimension of this second opening is greater than the sum of the dimension of a first opening in the direction of elongation and the distance separating two first successive openings; thus, the second opening is at least partially vis-a-vis two first openings regardless of its position along the elongation direction, and the fluid can flow linearly between the second opening and these at minus two first openings;
• the second opening is disposed facing at least three first openings
• the second opening is characterized by a ratio between its largest and its smallest dimension, at least greater than 1.5; it is understood that the dimensions of the second opening can be adapted according to the size and the number of first openings that one wishes to be vis-à-vis the second opening.
• vis-à-vis means a second opening revealing several first openings when we observe the inside of the manifold above the lid, this arrangement vis-à-vis allowing a linear or substantially linear flow of a fluid between said openings,
• the second opening advantageously has an oblong shape or a rectangular shape, and it can similarly be provided that the first openings also have an elongate, oblong or rectangular shape, provided that the second opening has a dimension in the direction of elongation sufficiently large to cover a plurality of first openings.
• the manifold may include a barrel arranged on the outer face of the lid so as to surround the second opening, to facilitate the adjustment of a conduit on the second opening.
• the barrel makes it easier to mount a fluid supply duct on the lid by acting as a guide.
• This drum could in this context have a height between 0.8mm and 1.2mm.
• the term "height" means a dimension of the barrel along an axis normal or substantially normal to the outer face of the lid.
• the free end of at least one side wall and the lid are deformed cold to achieve the fixing of the lid on the receptacle, and it can be provided that the cover is crimped on the receptacle by one or more ends of one or more side walls of the receptacle.
• the present invention also relates to a duct connected to a collector box described above, comprising an orifice of similar shape to a second opening of the lid, that is to say an elongate shape, in particular oblong or rectangular.
• This duct may comprise a flange surrounding the wall delimiting the orifice of the duct, continuously or discontinuously, the flange being arranged to allow the duct to be mounted on the box, in particular by crimping the flange with at least one side wall of the duct. box, simultaneously with the lid, and this so that the duct fluidly communicates with the inside of the manifold via the second opening.
• the collar is held on the lid by one or more free ends of a side wall of the receptacle.
• the flange is held on the cover by the free ends of two side walls vis-à-vis.
• the duct and the flange may have a wall thickness greater than the thickness of the duct wall in the vicinity of the end that extends substantially perpendicularly, so as to ensure better maintenance duct by the collar.
• the present application also relates to a heating, ventilation and / or air conditioning device comprising at least one heat exchanger supplied with fluid by a supply duct described above and connected to a collector box described above.
• the first openings may be connected to tubes forming a bundle of a heat exchanger, and at least a second opening to this supply duct of the heat exchanger.
• this heating, ventilation and / or air conditioning device provision may be made for the deformed side walls of the receptacle for fixing the lid with respect to the collecting box also for fixing the duct, via its flange with respect to this same collector box.
• the features, variants and different embodiments of the invention may be associated with each other, in various combinations, to the extent that they are not incompatible or exclusive of each other.
• Figure 1 is a vertical sectional view of an embodiment of a header box according to the invention.
• Figure 2 is a schematic top view of the manifold illustrated in Figure 1;
• Figure 3 is a sectional view along the sectional plane III-III shown in Figure 1;
• FIG. 4 is a perspective view of an embodiment of the supply duct adapted to cooperate with the collector box and visible in FIGS. 1 and 2.
• a manifold 1 comprises at least one receptacle 2 delimited by a bottom wall 4 and two side walls 6 extending substantially perpendicularly to two opposite edges of this bottom wall, so as to form a substantially U-shaped cavity.
• a lid 8 arranged to be disposed substantially parallel to the bottom wall and which will be described in more detail below, and two end walls 10 which extend transversely to the bottom and side walls.
• the collector box is connected, within a thermal loop, in a heating, ventilation and / or air conditioning device, via connection pipes made integral with connection elements carried by this box, and in particular via a conduit of supply 12 of a first fluid as shown in Figure 4 and which will be detailed in more detail below.
• a first fluid is fed through the supply conduit 12 upstream of the box collector, to be poured into the receptacle 2 which forms a distribution chamber of this fluid.
• the fluid is then distributed between different exchange tubes 14 allowing, in a heat exchange chamber not shown, to facilitate heat exchange with a second fluid flowing along these exchange tubes.
• the receptacle is made from fluid-tight materials it must accommodate.
• the thicknesses of the bottom and side walls are chosen so as to withstand the pressure of the fluid present in the box.
• the manifold 1 may comprise a plurality of receptacles 2 aligned in the extension direction of the box, corresponding to the axis A-A visible in FIGS. 2 and 3, each receptacle 2 being closed transversely by end walls. 16, which may take the form of a transverse closure wall of the box for the receptacles arranged at the ends of this box, or the shape of a transverse partition wall (as visible in Figure 1) between two consecutive receptacles .
• the lid 8 closes the receptacle 2 at the free ends of the side walls 6, that is to say the ends opposite to the bottom wall 4.
• the cover can be made from the same materials as the side walls and the bottom wall of the box, such as for example from metal or a compound based on polymers.
• the cover 8 is fixed on the side walls 6 by a known technique of assembling sheets by cold deformation, namely here by crimping the side walls with the lid. In order to facilitate these operations, the cover may rest on tabs 18 arranged projecting from the side walls towards the inside of the receptacle. According to the invention, it should be noted that the cold deformation operation for securing the cover 8 to the side walls 6 further allows the attachment of the supply conduit 12 of the first fluid to the manifold 1, as this will be detailed below.
• the manifold has a plurality of openings to allow the attachment of tubes for the circulation of fluid through the receptacle or receptacles 2. These openings consist, on the one hand, of the first openings 20 through the bottom wall 4 of the receptacle 2 to allow a fluid to exit the manifold and a second opening 22 made in the lid to allow the passage of a fluid from the outside to the inside of the box, the second opening 22 having the invention a specific shape, here oblong, to be vis-à-vis a plurality of first openings 20, which are here circular.
• the elongate shape of the second opening will be characterized by a ratio, between its largest and its smallest dimension, of at least greater than 1.5.
• a ratio between its largest and its smallest dimension, of at least greater than 1.5.
• the first and second openings are aligned along the same axis A-A visible in Figure 3 and the second oblong opening 22 is arranged so that its largest dimension, or length, coincides with the axis A-A. Furthermore, the width of the second opening 22 is equal to or greater than the diameter of the first openings 20, or the diameter of the largest of the first openings if they have different dimensions, so that all of the plurality of first openings 20 vis-à-vis the second opening 22 is directly accessible from this second opening 22.
• the dimensions of the second opening 22 depend on the dimensions of the first openings 20 and their spacing.
• the first openings 20 have a diameter of 5 mm and are spaced apart along the axis AA by 3 mm, while the length and the width of the second opening 22 are respectively equal to or greater than at 25mm and 10mm.
• the first fluid entering the distribution chamber that forms the header can be removed via the first openings 20 with a predominantly linear flow, that is to say with a minimum of disturbance of the flow (the indirect flow being represented by the two arrows Fi curved at the ends of the direct flow Fi visible in Figure 1).
• this characteristic can be obtained with a plurality of shapes, such as oblong, rectangular shapes, since the dimension in the direction of elongation of the box allows the recovery of several first openings by the second opening.
• the cover 8 has on its upper face, facing away from the receptacle, a shank 24 positioned around the second opening 22. It is thus clear that the shank also has a shape elongated in the direction of elongation A-A of the collector box, and here an oblong shape, as is particularly visible in Figure 3.
• this duct has, always at this proximal end 26, a flange 28, extending substantially perpendicularly to the wall of the duct at this proximal end, and surrounding the opening of the duct.
• This flange here continuous, but which could be discontinuous without departing from the context of the invention, is arranged to allow the crimping of the conduit on the lid during the operation of crimping the lid on the manifold.
• the conduit fluidly communicates with the distribution chamber via the second opening 22 of the manifold.
• FIG. 3 shows diagrammatically the covering of the flange 28 by two folded edges 30, so as to trap it between the upper face of the lid and the folded edges 30 of the side walls 6 of the box.
• This operation of deformation of cold material to boquer in position the collar 28 and thus the supply conduit 12 relative to the manifold 1 is made when the conduit 12 is perfectly in place next to the second opening 22.
• the barrel 24 aligns the opening formed at the proximal end 26 of the conduit 12 with the second opening 22, by fitting, or at least by guiding the conduit around the barrel. It can be provided that the thickness of the collar 28 is greater than the thickness of the conduit, at least in the proximal end zone that the collar extends substantially perpendicularly. It is understood that this ensures a better maintenance of the conduit on the manifold via the thickness of the collar, without the entire duct is oversized, which avoids additional cost and overweight.
• the invention makes it possible to achieve the objectives it has set itself and in particular to propose a collection box in a ventilation, heating and / or air conditioning device which is particularly easy to assemble and which makes it possible to a distribution of the fluid through the manifold minimizing pressure losses.
• the second opening made on the cover of the collector to cooperate with a feed pipe and facilitate the passage of fluid through a distribution chamber of the collector box towards a plurality of tubes, or specific dimensions to be vis-à-vis a plurality of these tubes, to increase the flow linearity of the fluid and reduce the pressure losses that would result from a linear flow.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Geometry (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Details Of Heat-Exchange And Heat-Transfer (AREA)
• Duct Arrangements (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=57590635

Family Applications (1)

Country Status (4)

Family Cites Families (5)

• 2016
  • 2016-09-27 FR FR1659128A patent/FR3056728B1/fr active Active
• 2017
  • 2017-09-27 EP EP17787220.7A patent/EP3519755B1/de active Active
  • 2017-09-27 WO PCT/FR2017/052611 patent/WO2018060606A1/fr unknown
  • 2017-09-27 CN CN201780059763.5A patent/CN110100145A/zh active Pending

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