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
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
  • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
  • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
  • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
• • 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
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
  • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
  • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
• • 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
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
  • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
• • 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
  • F28F2275/04—Fastening; Joining by brazing

Definitions

• the field of the present invention is that of heat exchangers, which in particular are destined to equip the air-conditioning loops of motor vehicles.
• the heat exchangers which equip the air-conditioning loops of vehicles are designed to permit the adjacent circulation in two separate spaces of two different fluids , such as to provide an exchange of heat between the fluids without mixing them.
• a type of heat exchanger which is used inter alia in the motor vehicle field is the plate exchanger, this exchanger being constituted by a stack of plates which are brazed to one another and are designed to define the spaces where the fluids circulate .
• the fluids circulate under high pressure .
• the efficiency of the heat exchangers and the thermodynamic circuits is mainly determined by the exchanges of heat between the fluids which pass through them.
• the heat exchangers are equipped with devices for disturbance of the flow of the fluids .
• the arrangement of these disturbance devices is generally the same on one side and the other side of the plates .
• this arrangement is not designed to optimise the disturbance of the flow of the fluids on both sides of the plate .
• a badly designed arrangement can give rise to a decrease in the mechanical strength of the plates, and thus of the heat exchanger, whilst increasing the losses of load within the system .
• the objective of the present invention is thus to resolve the above-described disadvantages by designing a plate for a plate heat exchanger, the plate being equipped with disturbance devices which are designed to disturb the circulation of the fluids efficiently on both sides of the plate, whilst having adequate mechanical strength .
• the subject of the invention is thus a plate for a heat exchanger with the general form of a bath, comprising at least one device for disturbance of the flow of a fluid, the disturbance device comprising at least one plurality of grooves .
• the grooves are parallel to one another and arranged in the form of a "V", each groove being defined by a width and a height .
• At least one branch of the "V" of at least one groove is disposed relative to a transverse direction of the plate according to an angle of between 25 and 30 ° , the ratio between the width and height of the said groove being between 2 and 2.5.
• This arrangement permits optimum agitation of the two fluids passing through a heat exchanger constituted by the plates according to the invention, whilst withstanding the mechanical stresses imposed by a thermodynamic circuit, in particular its high-pressure part .
• the invention makes it possible to withstand the test pressures to which these heat exchangers are subjected .
• the heat exchanges are improved, without increasing the losses of load, which makes it possible to improve the efficiency of the thermodynamic loops in which an exchanger of this type is installed .
• the plate according to the invention advantageously comprises at least any one of the following characteristics, taken alone or in combination :
• the ratio between the width and the height of the said groove is 2.2. It will be understood that this value can be approximately 5% more or less , taking into account the production tolerances;
• the width of a groove is the dimension of the groove in a longitudinal direction of the plate. The width of a groove is taken from a first edge of the groove to a second, opposite edge of the groove, in a direction perpendicular to the first edge. The width of the groove is taken from a top of the first edge of the groove to a top of the second edge of the groove.
• the width of at least one groove of the disturbance device is 3 mm. It will be understood that this value can be approximately 5% more or less, taking into account the production tolerances ;
• the height of a groove is the dimension of the groove in a vertical direction of the plate .
• the height of a groove is taken from a base of the groove as far as a top of the groove .
• the height of at least one groove of the disturbance device is 1.35 mm . It will be understood that this value can be approximately 5% more or less, taking into account the production tolerances;
• the two branches of at least one groove are disposed relative to the transverse direction of the plate according to an angle of between 25 and 35 ° .
• the two branches of the said groove are disposed relative to the transverse direction of the plate according to the same angle .
• the angle according to which at least one branch of the "V" of at least one groove is disposed relative to a transverse direction of the plate has a value of 30 ° . It will be understood that this value can be approximately 5% more or less , taking into account the production tolerances;
• the two branches of all the grooves of the disturbance device are disposed relative to the transverse direction of the plate according to an angle of between 25 and 35 ° .
• the two branches of all the grooves are disposed relative to the transverse direction of the plate according to the same angle;
• all the grooves of the disturbance device have a ratio between their width and their height of between 2 and 2.5.
• all the grooves of the disturbance device have the same ratio between their width and their height;
• the plate comprises a bottom which is surrounded by a raised closed peripheral edge forming the bath, with the disturbance device extending from, i.e. starting from, the bottom of the plate .
• the peripheral edge is continuous, i.e. it forms only a single peripheral edge extending around the entire periphery of the bottom of the plate;
• At least one groove of the disturbance device extends transversely from a first foot of the peripheral edge as far as a second foot of the peripheral edge .
• the first foot of the peripheral edge is opposite the second foot of the peripheral edge .
• the first foot of the peripheral edge extends along a first transverse end of the plate, with the second foot of the peripheral edge extending along a second transverse end of the plate .
• more than half of the grooves of the disturbance device extend transversely from a first foot of the peripheral edge as far as a second foot of the peripheral edge;
• the disturbance device extends from a lower face of the bottom of the plate
• At least one groove of the disturbance device extends in a direction opposite the general direction of extension of the peripheral edge .
• all the grooves of the disturbance device extend in a direction opposite the general direction of extension of the peripheral edge;
• the disturbance device is integral with the plate which supports it, i.e. the plate and the disturbance device are in a single piece, with the disturbance device being formed by deformations of a metal plate which constitutes the plate;
• At least one groove is continuous from one branch to the other, i.e. its height is constant between the first transverse end of the plate and the second transverse end of the plate;
• the tip of the "V" of at least one groove is substantially in the centre transversely of the plate
• the disturbance device is produced by drawing or by rolling
• the plate comprises at least one hole which is designed to permit the circulation of at least one fluid .
• the plate is advantageously provided with a plurality of holes , for example four holes , each disposed at a corner of the plate . Two of these holes are used by the first fluid, and the other two holes are used by the second fluid .
• the invention also relates to a tube for circulation of fluid comprising a first plate and a second plate as defined above, with the grooves in the form of a "V" of the first plate being disposed in an opposite direction to the grooves in the form of a "V" of the second plate .
• the circulation tube according to the invention advantageously comprises at least any one of the following characteristics, taken alone or in combination :
• each groove comprises a base, the base of each groove of the first plate being in contact with the bottom of the second plate; the base of at least one groove of the first plate is in contact with an upper face of the bottom of the second plate, at least between two grooves of the second plate;
• the base of the groove of the first plate is in contact with the upper face of the bottom of the second plate, between a plurality of grooves of the second plate;
• the first plate and the second plate are brazed together, in particular at least at the points of contact between the groove the bottom of the plate. This therefore increases the mechanical strength of the circulation tube, by preventing the bottoms of the two plates from becoming spaced from one another;
• the baths of the plates are imbricated in one another .
• the upper face of one plate known as the first plate
• the lower face of an adjacent plate known as the second plate
• the lower face of the plate facing the upper face of another adjacent plate, for example a third plate .
• the invention also relates to a heat exchanger comprising a plurality of plates previously defined, the plates being imbricated in one another, with at least one first pair of plates defining a first circulation tube which can be used by a first fluid, and at least one second pair of plates defining a second circulation tube which can be used by a second fluid .
• the invention also relates to use of a heat exchanger of this type as a gas cooler or condenser .
• the first fluid is a coolant fluid and the second fluid is a heat-carrying liquid .
• the invention relates to a coolant fluid circuit comprising at least one expansion unit , an evaporator, a compressor and a heat exchanger as defined above, through which a coolant fluid and a heat-carrying fluid pass.
• FIG. 1 is a general view in perspective of a heat exchanger according to the invention.
• FIG. 2 is a view in perspective of a plate according to the invention.
• FIG. 3 is a view from above of a plate according to the invention, illustrating in particular the arrangement of a disturbance device arranged on the plate;
• FIG. 4 is a view in cross-section of a plate, illustrating in particular the arrangement of a disturbance device arranged on the plate, according to a plane perpendicular to a plane I-I shown in figure 3;
• FIG. 5 is a schematic view of the interaction between the base of the grooves of a first plate with the bottom of a second plate in which the first plate is inserted .
• the longitudinal direction corresponds to the main axis of the heat exchanger, on which its largest dimension extends .
• the vertical direction corresponds to the direction of stacking of the plates which constitute the heat exchanger, with the transverse direction being the direction perpendicular to the two others .
• the longitudinal, transverse and vertical directions can also be seen in a trihedron L, V, T represented in the figures .
• Figure 1 shows in perspective a heat-exchange module 3 formed by a separation unit 56 which is integral with a heat exchanger 1.
• the heat exchanger l is a component of a coolant fluid circuit which equips a vehicle, in particular a motor vehicle .
• the heat exchanger 1 implements an exchange of heat between a first fluid and a second fluid, with the first fluid then being cooled by the second fluid .
• the heat exchanger 1 is used as a condenser for a sub-critical or super-critical coolant fluid .
• the second fluid is advantageously a heat-carrying liquid, such as a mixture of water and glycol .
• the heat exchanger 1 comprises a bundle 6 where the exchange of heat between the first fluid and the second fluid takes place .
• the bundle 6 is globally formed by a stack of plates 2 , superimposed on one another along a direction of stacking 7 of these plates 2.
• the bundle 6 comprises in particular cheeks with the references 50 and 52 which delimit the bundle 6 along the direction of stacking 7. Between these two cheeks 50 and 52 is disposed the plurality of plates 2 which delimits two distinct circuits , i.e. a first circuit 4 , through which the first fluid is designed to pass and a second circuit 8 through which the second fluid is configured to pass .
• the heat exchanger 1 also comprises means for putting these circuits into contact firstly with a circuit for the first fluid outside the heat exchanger 1, and secondly with a circuit for the second fluid outside the heat exchanger 1.
• the heat exchanger 1 thus comprises a first sleeve 68 , by means of which the first fluid can enter into the heat exchanger 1, and a second sleeve 70 , by means of which the first fluid can exit from the heat exchanger 1.
• This heat exchanger 1 also comprises a third sleeve 72, by means of which the second fluid can enter into the bundle 6, as well as a fourth sleeve 74 , by means of which the second fluid can exit from the bundle 6.
• the bundle 6 comprises a first orifice and a second orifice which are used by the second fluid, and which are in communication with a base 57 interposed in fluid communication between the heat exchanger 1 and the separation unit 56, the latter being supported mechanically by the base 57.
• the base 57 thus forms part of the heat-exchange module 3.
• the heat exchanger 1 comprises a first longitudinal end 40 and a second longitudinal end 42 , the first longitudinal end 40 being opposite the second longitudinal end 42 relative to a central portion 43 of the heat exchanger .
• the heat exchanger 1 thus comprises a set of plates 2 which are stacked on one another in order to form the circuits of the heat exchanger 1.
• An example of a plate 2 is illustrated in figure 2.
• Two immediately adjacent plates 2 define a circulation tube, where the first fluid or the second fluid can circulate .
• the circulation tubes designed for circulation of the first fluid known as the first circulation tube
• alternate with the ducts designed for the circulation of the second fluid known as the second circulation tube .
• a first plate 2 can be designed for the circulation of the first fluid in association with a second, adjacent plate 2
• a single plate 2 is thus lapped on one side by the first fluid and on the other side by the second fluid.
• each plate 2 has the form of a bath, i.e. it comprises a bottom 20 surrounded by a peripheral edge 22.
• the bottom 20 of the plate 2 has the form of a rectangle with rounded corners .
• the peripheral edge 22 which surrounds the bottom extends continuously around the entire plate 2 , without interruption .
• the peripheral edge 22 comprises an inner face 24 and an outer face 26 , the outer face 26 being opposite the inner face 24.
• the bottom 20 is delimited by an upper face 30 and a lower face 32 , the upper face 30 being the face from which the peripheral edge 22 rises , the lower face 32 being the face of the plate 2 opposite the upper face 30.
• the inner face 24 of the peripheral edge 22 is in continuity with the upper face 30 of the bottom 20 of the plate 2.
• the peripheral edge 22 is widened, i.e. the perimeter of the part of the peripheral edge 22 which is in contact with the bottom 20 is smaller than the perimeter on its free part 28 , the free part 28 being the part opposite the part in contact with the bottom 20.
• the plates 2 are stacked on one another, with the upper face 30 of a first plate 2 facing the lower face 32 of a second, adjacent plate 2. Similarly, the lower face 32 of the first plate 2 faces the upper face 30 of a third, adjacent plate 2.
• the plates 2 are produced by drawing, stamping or rolling a strip of a material designed to permit heat exchanges which are sufficient to allow the heat exchanger 1 to play its part .
• This material can in particular be aluminium or an aluminium alloy .
• Each plate 2 comprises at least one hole 34.
• the plates 2 comprise four holes 34, disposed at each of the corners of the plate 2.
• the plates thus comprise a first hole 34a, a second hole 34b, a third hole 34c and a fourth hole 34d .
• the holes 34 have a circular form.
• the holes 34 are through-holes . These holes 34 are designed to permit the passage of the first fluid or the second fluid .
• the plates 2 comprise a device 100 for disturbance of the flow of at least one of the fluids, and advantageously both of the fluids which can pass along the heat exchanger.
• the plates 2 comprise a first transverse end 44, a second transverse end 46 opposite the first transverse end 44 relative to the disturbance device 100, a first longitudinal end 40, and a second longitudinal end 42 opposite the first longitudinal end 40 relative to the disturbance device 100.
• the first hole 34a is disposed at the corner of the first longitudinal end 40 and the first transverse end 44.
• the second hole 34b is disposed at the corner of the second longitudinal end 42 and the first transverse end 44.
• the third hole 34c is disposed at the corner of the first longitudinal end 40 and the second transverse end 46.
• the fourth hole 34d is disposed at the corner of the second longitudinal end 42 and the second transverse end 46.
• the first hole 34a and the second hole 34b are designed to permit the circulation of the first fluid .
• the third hole 34c and the fourth hole 34d for their part are designed to permit the circulation of the second fluid .
• the plates 2 are differentiated into a first type of plate 2a and a second type of plate 2b.
• the term and the reference "plate 2 designate equally well one, the other, or both types of plates .
• the third hole 34c and/or the fourth hole 34d are arranged in the bottom 20 of the first plate 2a, i.e. a plane in which the third hole 34c and/or the fourth hole 34d extend ( s ) coincides with the plane in which the bottom 20 of the first plate 2a extends .
• first hole 34a and/or the second hole 34b is/are disposed at the end of a collar 48.
• This arrangement is illustrated in figure 2.
• the collar 48 of a first plate 2a is designed to be in contact with the lower face 32 of the second, adjacent plate 2b. When the collar 48 is in contact with the lower face 32 of the second, adjacent plate 2b, it prevents the circulation of the first fluid in the circulation tube designed for the second fluid .
• the first hole 34a and/or the second hole 34b is/are arranged in the bottom 20 of the second plate 2b, i.e. the plane in which the first hole 34a and/or the second hole 34b extend ( s ) coincides with the plane in which the bottom 20 of the second plate 2b extends .
• the third hole 34c and/or the fourth hole 34d is/are disposed at the end of a collar 48.
• the collar 48 is in contact with the lower face 32 of a first plate 2a of a pair of immediately adjacent plates . This collar 48 prevents the circulation of the second fluid in the duct designed for the first fluid .
• the plates 2 comprise at least the disturbance device 100, which is illustrated in figures 2 to 4 , and is designed to disturb the circulation of the fluid ( s ) circulating along the plates .
• This disturbance device 100 is for example integral with the plates 2 , i.e. it forms a single block of material with the plate 2 in which it is formed .
• the disturbance device 100 is obtained from the plate 2 production process, and is for example drawn at the same time as the plate 2.
• the disturbance device 100 extends between the first hole 34a and the third hole 34c on the one hand, and the second hole 34b and the fourth hole 34d on the other hand, i.e. over all of the portion of the plates 2 which extends between the first longitudinal end 40 and the second longitudinal end 42.
• This disturbance device 100 is in the form of chevrons, i.e. a succession of grooves 104 profiled in the form of a "V" when observed in a plane perpendicular to the plane of extension of the plate 2.
• This arrangement in the form of chevrons can be seen in figures 2 to 4.
• Each groove 104 thus comprises two branches 106, corresponding to the two branches 106 of the "V".
• the tip of the "V" of at least one groove 104 is substantially in the centre transversely of the plate 2.
• the grooves 104 are profiled in the form of a "U" in a cross-sectional plane perpendicular to the direction of the branch 106 of the groove 104 concerned.
• This profile in the form of a "U” thus defines two tops 110, a base 108, a first edge 103 and a second edge 105. This arrangement can be seen more particularly in figure 4.
• the top 110 of the disturbance device 100 is the part of the plate 2 which corresponds to an upper face of the bottom 20 of the plate 2 disposed between two grooves 104.
• the base 108 of the disturbance device 100 is the part of the plate 2 which corresponds to a lower face of the groove 104.
• each groove 104 The two branches 106 of each groove 104 are arranged relative to the transverse direction of the plate 2 according to an angle 10 with a value of 30 ° .
• This characteristic is illustrated in figure 3. It will be understood that , in an alternative version of the invention, the angle 10 will have a value of between 25 and 35 ° .
• the values of the angle 10 contained in this range correspond to values which make it possible to achieve a high coefficient of heat exchange whilst minimising the losses of load of each side of the plate 2 , i.e. with reference to the first fluid and with reference to the second fluid .
• the disturbance device 100 makes it possible to improve the heat exchanges between the fluids, without detracting from the strength of the plates 2. This therefore eliminates the need to increase the thickness of the material of the plates 2.
• Each groove 104 is defined by a height 12 and a width 14 illustrated in figure 4.
• the height 12 of a groove 104 is the dimension of the groove 104 in a vertical direction, i.e. the direction perpendicular to the general plane of extension of the bottom 20 of the plate 2.
• the height 12 of a groove 104 is measured between a first plane passing via two bases 108, and a second plane passing via two tops 110, in a direction perpendicular to the first plane .
• the height 12 of a groove 104 is 1.35 mm. It will be understood that , in an alternative version of the invention, the height 12 of a groove 104 is between 1 and 1.70 mm.
• the width 14 of a groove 104 is the dimension of the groove 104 measured perpendicularly to the direction of extension of a branch 106 of the groove 104.
• the width 14 of a groove 104 is taken from a first edge 103 of the groove 104 to a second, opposite edge 105 of the groove 104, in a direction perpendicular to the first edge 103.
• the width 14 of the groove 104 is taken from the top 110 of the first edge 103 of the groove 104 to the top 110 of the second edge 105 of the groove 104.
• the width 14 of a groove 104 is 3 mm . It will be understood that , in an alternative version of the invention, the width 14 of a groove 104 is between 2 and 4 mm.
• two grooves 104 With the grooves 104 being disposed in the vicinity of one another, two grooves 104 have a common edge . Thus, an edge between two grooves 104 can be at the same time a first edge 103 of a first groove 104 , and a second edge 105 of a second, adjacent groove 104.
• the ratio between the width 14 and the height 12 of a groove 104 is between 2 and 2.5. In other words, the width 14 of the groove 104 is 2 to 2.5 times greater than the height 12 of the groove 104. In the example of the invention illustrated here, the ratio between the width 14 and the height 12 of a groove 104 is 2.2.
• all the grooves 104 have the same height 12 and the same width 14.
• only some of the grooves 104 which constitute the disturbance device 100 comply with this ratio of width to height .
• the grooves 104 extend from a first foot 112 of the peripheral edge 22 along the first transverse end 44 of the plate 2 , and are continuous as far as a second foot 114 of the peripheral edge 22 along the second transverse end 46 of the plate 2.
• the grooves 104 are continuous along their entire length, i.e. their height 12 is constant from the first foot 112 to the second foot 114.
• the direction of the chevrons alternates from one plate 2 to another .
• the grooves 104 in the form of a "V" of the first plate 2 are disposed in a direction opposite the grooves 104 in the form of a "V" of the second plate 2.
• the tip of the "V” of the grooves 104 of a first plate 2 faces towards the first longitudinal end 40
• the tip of the "V" of the grooves 104 of a second plate 2 immediately adjacent to the first plate 2 faces towards the second longitudinal end 42
• the tip of the "V" of the grooves 104 of a third plate 2 immediately adjacent to the first plate 2 faces towards the second longitudinal end 42.
• the deformation of the disturbance device 100 during the production process takes place in the direction opposite the bath of the plate 2 , i.e. the disturbance device 100 extends from the lower face 32 of the plate 2.
• the direction of this deformation is the same for each plate 2.
• at least a portion of the bases 108 of the grooves 104 of the first plate 2 comes into contact with a portion of the bottom 20 of the second plate 2 arranged below the first plate 2 concerned . More particularly, a point of contact 18 is established between the base 108 of the upper plate 2 and the top 110 of the lower plate 2, between two grooves 104 of the lower plate 2.
• a circulation tube comprises a plurality of points of contact 18.
• the top 110 of each groove 104 of a first plate 2 has a plurality of points of contact 18 with the base 108 of a plurality of grooves 104 of a second plate 2.
• the base 108 of each groove 104 of the second plate 2 has a plurality of points of contact 18 with the top 110 of a plurality of grooves 104 of the first plate 2.
• a groove 104 of a first plate 2 is in contact with a groove 104 of a second plate 2 at two points of contact 18. There is a point of contact 18 per branch 106 of a groove 104.
• a first branch 106 of the groove 104 of the first plate 2 is in contact with a first branch 106 of the groove 104 of the second plate 2
• a second branch 106 of the groove 104 of the first plate 2 is in contact with a second branch 106 of the groove 104 of the second plate 2.
• this point of contact 18 forms a bridge which joins the two adjacent plates constituting the circulation tube .
• a bridge of this type disturbs the flow of the fluid between the two plates 2.
• Each of these points of contact 18 participates in the reinforcement of the heat exchanger 1 by rendering the plates 2 integral with one another, thus preventing their separation, and allowing distribution of the forces between all of the points of contact 18.
• This arrangement is illustrated in figure 5.
• the solid lines represent the grooves 104a of a first plate 2
• the broken lines represent the grooves 104b of a second plate 2
• the dotted lines represent the tops 110 of the second plate 2.
• the first fluid is a heat-carrying liquid or a mixture of one or a plurality of heat-carrying liquids and one or a plurality of other fluids, with the heat-carrying liquid ( s ) being selected from amongst the heat-carrying liquids permitted and suitable for the use which is made of them .
• the heat-carrying liquid ( s ) is/are in particular water, deionised water, a mixture of glycol and water or a dielectric liquid such as fluorinated hydrocarbons .
• the second fluid is a coolant fluid or a mixture of one or a plurality of coolant fluids and one or a plurality of other fluids , the coolant fluid ( s ) being selected from amongst the coolant fluids permitted and suitable for the use which is made of them .
• the coolant fluid ( s ) is/are in particular the family of hydrochlorofluorocarbons (HCFC ) , or hydrofluorocarbons (HFC ) .
• the coolant fluid can in particular be R134a or 1234YF .
• the coolant fluid can also be carbon dioxide known by the acronym R744.
• the different plates 2 which define the heat exchanger 1 are stacked .
• a first plate 2 corresponding to the first type of plate 2a, is disposed alternating with a second plate 2 , corresponding to the second type of plate 2b, the stack of these alternating plates 2 being contained between the first cheek 50 and the second cheek 52.
• the first sleeve 68, the second sleeve 70, the third sleeve 72 and the fourth sleeve 74 are then put into place .
• the heat exchanger 1 thus designed can operate in accordance with the following example .
• This example is non-limiting, and other types of operation can be envisaged . From amongst these types of operation, there will be the possibility of arranging the circuits such as to make the fluids circulate in them in several passes .
• the first fluid enters into the heat exchanger 1 via the first sleeve 68.
• the first fluid circulates in the first circuit 4 towards the second sleeve 70 in a single pass .
• the circulation of the first fluid is disturbed by the disturbance devices 100.
• the first fluid is then discharged from the second sleeve 70 to a loop for heat treatment of the first fluid .
• the first fluid is in the liquid state, and exchanges heat with the second fluid .
• the second fluid enters into the heat exchanger 1 via the third sleeve 72.
• the second fluid can be in the gaseous state .
• the second fluid circulates in the second circuit 8 and transfers its heat to the first fluid which circulates in the first circuit 4. This transfer of heat results in cooling of the second fluid, which goes from the gaseous state to a diphasic gas-liquid state, then to a liquid state.
• the flow of the second fluid is disturbed by the disturbance devices 100 which are present in the second circuit 8.
• the second fluid passes through the separation unit 56 before reaching the fourth sleeve 74 , and being discharged.
• the plate which has a device for disturbance of the flow of a fluid, the disturbance device comprising grooves with a ratio between their width and their height of between 2 and 2.5, and branches which are disposed relative to a transverse direction of the plate according to an angle of between 25 and 35 ° .
• the invention can not be limited to the embodiment specifically described in this document, and extends in particular to any equivalent means and to any technically operative combination of these means .

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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 (1)

Family

ID=62222848

Family Applications (1)

Country Status (4)

Family Cites Families (7)

• 2018
  • 2018-01-29 FR FR1850709A patent/FR3077379A1/fr active Pending
• 2019
  • 2019-01-29 CN CN201980016262.8A patent/CN111788449A/zh active Pending
  • 2019-01-29 EP EP19701666.0A patent/EP3746731A1/de not_active Withdrawn
  • 2019-01-29 WO PCT/EP2019/052093 patent/WO2019145555A1/en unknown

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