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
  • 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
  • F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
• • 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
  • F28D21/0001—Recuperative heat exchangers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
  • F28F2250/10—Particular pattern of flow of the heat exchange media
  • F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction

Definitions

• the invention relates to a heat exchanger, comprising channels of the first sort and channels of the second sort, wherein the channels extend mutually parallel, are mutually separated by walls, are substantially mutually adjacent and in section are ordered according to a regu ⁇ lar pattern.
• Such a heat exchanger is known inter alia from the patent application with publication number WO 94/100520.
• This heat-;exchanger of the prior art has the drawback that the seals between the various walls must satisfy strict requirements relating to the sealing of the fluids to be transported through the heat exchanger in order to prevent fluid flowing in the channels of the first sort from entering fluid flowing through channels of the sec- ond sort and vice versa.
• the object of the present invention is to provide such a heat exchanger, wherein the above mentioned prob- lems are avoided, i.e. a heat exchanger which is simple to construct, wherein less high standards of accuracy of construction are required, and wherein the fluids flowing in the different sorts of channels are prevented from intermixing.
• This object is achieved in that the heat exchanger is assembled from flat plates and profiled plates stacked alternately on each other and forming the walls, wherein the profiled plates come into contact with both adjoining flat plates and each of the plates forms a separation between channels of the first sort on a first side and channels of the second sort on the second side. Stacking of the plates on each other results in a simple construction. It is also less important herein that the plates are placed in mutually displaced manner; in all cases the channels of the first sort are bounded by channels of the second sort.
• Another application lies in use as condenser and also recuperator in for instance tumble dryers or refrigera ⁇ tion installations, or as pre-heater for burners.
• the profiled plates are connected by adhesion to each of the adjoining flat plates.
• the heat exchanger is provided on at least one side with a con ⁇ necting piece, wherein the connecting piece is formed by continuations of the flat plates and by substantially flat continuations of the profiled plates.
• figure 1 shows a schematic perspective view of a heat recovery unit with a heat exchanger according to the in ⁇ vention
• figure 2 shows a schematic perspective view of a portion of a profiled plate for use with the heat exchan ⁇ ger depicted in figure 1
• figure 3 shows a schematic, exploded perspective view of the transition region between the profiled portion and the flat portion of the plate depicted in figure 2
• figure 4 is a schematic perspective detail view of the plate depicted in figure 2
• figure 5 is a schematic perspective detail view of a heat exchanger, constructed with the plates depicted in figure 4
• figure 6 shows a perspective view of a portion of a plate according to a variant of the embodiment
• FIG. 1 Shown in figure 1 is a heat exchanger 1 which is formed by plates 2, 3 stacked on each other. This configuration is particularly suitable for heat ⁇ ing fresh.ventilating air flowing into a house by warm ventilating air leaving the house.
• the plates are formed alternately by flat plates 2 and by profiled plates 3, as will be elucidated hereinbe- low, inter alia with reference to figure 2.
• Figure 1 serves only to demonstrate that the heat exchanger 1 is essentially formed by plates 2,3 which are stacked on each other and; which are placed in a housing 4.
• the housing 4 is divided on the top of the heat exchanger 1 into a first chamber 5 and a second chamber 6.
• the first chamber 5 is provided with a connec ⁇ tion 7 for supply of discharge air, while a connection 8 is arranged in the second space 6 for discharge of the fresh air.
• a fan 9 is furthermore arranged in the second space 6.
• the housing 4 On the underside of the actual heat exchanger 1 the housing 4 is divided into a third space 10 and a fourth space 11.
• the third space 10 is provided with a connec ⁇ tion 12 for supply of fresh air
• the fourth space 11 is provided with a discharge connection 13 for used air.
• a further fan 14 ' is moreover arranged in the space 11.
• the air for discharge via the connecting piece 7 is guided via the space 5 to the actual heat exchanger which is formed by the plates 2,3 stacked on each other, exits therefrom into the fourth space 11 in housing 4 and is discharged by means of fan 14 and connecting piece 13.
• the actual heat exchanger is formed by plates 2,3 stacked on each other.
• Figure 2 shows a detail of a profiled plate 3.
• the plate 3 comprises a highly profiled portion 15. This portion has in cross section a profile corrugated in V-shape, wherein it is noted that the invention is not limited to a purely V-shape,- it is also possible to use other shapes, for example a sine shape or other slightly rounded shape.
• On the outside the plate 3 is formed by a flat por ⁇ tion 16.
• This flat portion 16 serves respectively to dis ⁇ charge and supply the fluids for carrying through the V- shaped recesses which are otherwise bounded on their top side by the flat plate 2 for placing on plate 3.
• On its outside the plate 3 is provided with a standing edge 17 which transposes into a flat edge 18, with which the rel ⁇ evant plate can be adhered to the flat plate for fixing thereon.
• the plates are manufactured from a plastic which is easy to thermally deform.
• Figure 2 further shows that the flat portion 16 is provided with ribs 19 and 20 respectively.
• the guide rib 19 serves to guide to the relevant channels the gases leaving the channels of the first sort or to be fed the ⁇ reto and also to maintain distance between the flat por ⁇ tion 16 and the flat plate 2 placed thereon.
• the same consideration applies for the downward directed guide ribs 20; however, these form the spacer to the flat plate 2 placed under the plate 3.
• transition area 21 which is shown in more detail in figure 3.
• Figure 3 shows clearly how the triangular configuration trans- poses into the flat configuration via a gradual transi ⁇ tion area.
• figure 4 shows in schematic form a complete plate 3. It is pointed out here that the plate shown in figure 4 has relatively few channels; the number of chan ⁇ nels is in fact much greater relative to the dimensions of the plate.
• Shown in figure 6 is a variant of the profile plate 3 wherein the flat portion 16 of plate 3 is shaped differ ⁇ ently.
• each flat portion 16 of plates 3 is bounded on one side by a boundary surface connected to a space of the first sort and another boundary surface connected to a space of the second sor . There are therefore always two boundary surfaces per flat portion 16.
• FIG 8 shows how the heat exchanger according to the embodiment of figure 7 is connected. It can be seen here that each of the boundary surfaces of the first sort is connected to a space 24 of the first sort which is partially closed off on its top side by a surface 25. In similar manner the boundary surfaces of the second sort 23 are closed off by a space of the second sort 26 which is partially closed off by a boundary surface 27.
• figure 9 is shown how the spaces of the first sort 24 are connected to a chamber 15 of the first sort and also how the spaces of the second sort 26 are connected to the chamber 16 of the second sort.
• the chamber 15 of the first sort 24 and the chamber 16 of the second sort 26 are separated by a surface 28 and enclosed by a hous ⁇ ing 29.
• FIG. 10 shows a diagram of a tumble dryer.
• the tumble dryer designated integrally with 30 comprises a drying drum* 31, a heating element 32 and a condenser 33, as is the case in conventional tumble dryers.
• the tumble dryer according to the present invention is further pro ⁇ vided with a recuperator or heat exchanger 34. It will be apparent that use can be made for recuperator 34 of a heat exchanger according to the present invention.
• the diverse components are otherwise mutually connected by channels 35.
• the recuperator serves herein to pre-heat the air which comes from the condenser and from which the mois ⁇ ture has been condensed, this with the cooling air coming from outside which is heated in the condenser and the heat of which is transferred at least partially in the recuperator to the air circulating in the tumble dryer.
• the amount of heat which must be supplied to the air at heating element 32 in order to obtain sufficient evapora ⁇ tion in drying drum 31 is hereby greatly reduced.
• recuperator 34 and the condenser 33 are combined into a separate unit which is shown in figure 11.
• a unit 36 is herein divided by means of a substantially vertically extending surface 37 into a condenser 33 and a recuperator or pre ⁇ heating unit 34.
• the connecting piece On one side the connecting piece is he ⁇ rein adapted to guide the cooling air heated in condenser 33 in a U-shape to recuperator 34, while the connecting piece on the other side is adapted to guide the air leav ⁇ ing condenser 33 in a U-shape back to pre-heater 34.
• connection pieces 25 and 27 have the same shape as con ⁇ necting pieces 25 and 27 of the normal embodiment of a heat exchanger shown in figure 8, but that the housing connecting thereto is provided with partitions 39 and is closed on its underside by a partition 38 in order to form the U-shaped guide.
• FIG 13 Further shown in figure 13 is the total assembly is of all relevant parts of the combination of a heat ex ⁇ changer or recuperator and condenser for use in for in ⁇ stance a tumble dryer.
• FIG 14 is shown another embodiment of plates 2 and 3 which'is a varia ' nt of the plate 3 shown in figure 6.
• the plate 3 is extended beyond the flat portion 16 of profiled plate 3 and beyond the ribs placed hereon and formed by 17 and 18.
• extension 40 In the thus formed extension 40 are also formed ribs 41 as well as openings 42.
• At the corresponding locations of plate 2 recesses 42 are like ⁇ wise arranged in the extensions 40 thereof. It will be apparent that when the thus formed plates 2, 3 are placed onto each other the configuration results which is shown in figure 15.
• Substantially vertically extending channels are hereby created which fulfill the function of the space of respectively the first and second sort.
• figure 16 shows an embodiment of a top view of a further embodiment of a plate 3, wherein for correct distribution of the gases flowing through the heat ex- changer the channels are embodied on one side of the heat exchanger at least partially diverging or converging, and diverging in the direction from outside toward the actual heat exchanger.
• Such an embodiment is of particular im- portance in the case of large temperature gradients whe ⁇ rein, as a result of a temperature change caused by the fluids passing through, particularly when these fluids are gaseous, a considerable change in volume can occur.
• normal supply means to the heat exchanger there could be an unequal distribution of the fluids over the heat exchanger which would result in reduced effec ⁇ tiveness thereof.

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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)
• Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19761257

Family Applications (1)

Country Status (7)

Cited By (6)

Families Citing this family (4)

Citations (7)

• 1995
  • 1995-06-30 NL NL1000706A patent/NL1000706C2/xx not_active IP Right Cessation
• 1996
  • 1996-06-27 ES ES96921155T patent/ES2129976T3/es not_active Expired - Lifetime
  • 1996-06-27 DK DK96921155T patent/DK0835416T3/da active
  • 1996-06-27 WO PCT/NL1996/000263 patent/WO1997002461A1/en active IP Right Grant
  • 1996-06-27 EP EP96921155A patent/EP0835416B1/en not_active Expired - Lifetime
  • 1996-06-27 DE DE69602025T patent/DE69602025T2/de not_active Expired - Lifetime
  • 1996-06-27 AT AT96921155T patent/ATE178707T1/de active

Patent Citations (7)

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