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
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
  • F28D7/028—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of at least one medium being helically coiled, the coils having a conical configuration
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
  • F24D3/00—Hot-water central heating systems
  • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
  • F24D3/087—Tap water heat exchangers specially adapted therefore
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
  • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
  • F24H1/18—Water-storage heaters
  • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
  • F24H6/00—Combined water and air heaters

Definitions

• the present invention relates to a quick operating heat exchanger device.
• the present invention relates to a heat exchanger device having a relatively large surface of thermal exchange allowing a quick thermal exchange between two fluids to be carried out, thereby keeping the loss of pressure at a very low level.
• the invention may be maily applied in the field of thermo-mechanical industry.
• the known heat exchangers are devices which are normally used in various hydraulic circuits (e.g. for producing hot water for sanitary an heating use by means of a boiler or a tele-heating network, or in cooperation with heat pumps, systems for cooling induction furnaces, co-generation systems etc. ), and inside of refri erat in /heat ing machines.
• tube-nest heat exchangers are known, in which the tube nest may assume various configurations inside of the device, in accordance with design requirements also known are plate-type heat exchangers, which are formed by a stack of corrugated plates superimposed to each other in order to form circuits for heat exchange between two different fluids, which are generally flowing in countercurrent .
• Document DE-A-2,236, 954 discloses a heat exchanger characterised by a large thermal exchange surface and by a low speed. - _ The fluid circulating into this exchanger does not contact the whole thermal exchange surface, but only the central portion thereof; the apparatus may not then achieve good performances.
• Document EP-A-0,057,850 discloses an apparatus 0 constituted by a pair of heat exchanger which are connected in parallel, and therefore the water flow is distributed in parallel over said exchangers.
• this apparatus may only be used as water collector.
• Document DE-U-8, 912, 339 discloses a heat exchanger in which the primary fluid flows in the central portion of the exchanger. 0 The secondary fluid does not flow countercurrent in respect of the water fluid, as it may be seen in fig. 1 of said DE document; on the contrary, the water fluid is lateral, and the exchanger has an overall low performance.
• the present invention aims to obviate to the disadvantages and drawbacks mentioned above, and to provide for a device for heat exchanging between two fluids which features a great exchange speed, low losses of pressure, and which is at the same time provided with a modular and/or composable structure.
• the quick-operating heat exchanger device according to the present invention may generally be used inside of any type of hydraulic circuit for the most different kinds of application, in cooperation with any machine suitable for producing thermal or frigorific energy.
• the heat exchanger according to the invention allows a quick thermal exhange with low losses of pressure to be carried out between any kind of fluids, e.g. water/gas, water/oil, oil/oil, glycol /water , gas/gas, water/water, etc. .
• any kind of fluids e.g. water/gas, water/oil, oil/oil, glycol /water , gas/gas, water/water, etc.
• the heat exchanger comprises a pair of tubular containers adjacent to each other and connected by one end, suitable for containing a first fluid which is inlet at a predetermined pressure.
• each one of the containers houses a circuit in which a second fluid flows, in a direction which is generally in countercurrent in respect of the flowing direction of said first fluid.
• Both ends of the containers are tightly sealed by means of a suitable cover, of which the head cover comprises the inlet and outlet connectors of both fluids, and the bottom cover comprises the connectors by means of which the fluids pass from one tubular container to the other one.
• FIG. 1 shows a schematical side section of a heat exchanger device according to the invention
• FIG. 1 shows a schematical plan view of the device shown in fig. 1
• FIG. 3 shows a schematical side section of a combined water and air heating apparatus embodying the heat exchanger according to the invention.
• a quick-operating hat exchanger device comprises a pair of tubular elongated containers 3, 7 having a generally cylindrical shape and which are disposed adjacent to each other.
• a first, generally metallic cover 1 is present; said cover 1 performs the triple functions of: tightly sealing said upper end; forming an element for connecting and reciprocally holding positioned both containers, and building up a connector element for the inlet and outlet conduits of the fluids into/from the heat exchanger .
• a second cover 2 is located at the lower end of the containers 3, 7; said second cover performs the triple functions of: tightly sealing said lower end; forming an element for connecting and reciprocally holding positioned both containers, and building up a connector element allowing the passage of the fluids from one container to the other one.
• the cover 1, which is placed upon containers 3, 7 with the interposition of a suitable sealing gasket 8, comprises a series of peripheral holes which are suitable for receiving tie rods 6 connecting cover 1 to cover 2, said tie rods being placed outside of the pair of containers 3, 7.
• cover 1 comprises a first pair of holes that are suitable for sealingly house, with the interposition of suitable gaskets 9, the connecting elements 11, which are fastened by means ot nuts 10, for the respective pipes 4, 5 which are placed inside of the container s 3 , 7.
• cover 1 still comprises at least two inlet and outlet holes 12, 13 (figure 2 shows four holes) of the fluids into/from the containers 3, 7.
• the bottom cover 2 has a structure which is identical to that of cover 1; however, in this case, holes 11 are suitable for housing the connectors fo ⁇ a pipeline 14 which connects pipes 4 and 5 to each other, while holes 12, 13 are suitable for housing the connectors for at least one pipeline 15 suitable for allowing the passage of a fluid from container 3 to container 7 or vice versa.
• the exchanger device is completed by a suitable insulating material 17 which is placed roundabout the assembly containers/covers .
• a primary fluid is inlet into pipeline 5 which is housed inside of container 7, it flows out of said container 7, it flows within pipeline 14, it is inlet into pipeline 4 which is housed within container 3 and it finally flows out from upper connector 11.
• a secondary fluid is inlet, in counterc rient in respect of said primary fluid, into container 3 through inlet holes 12, it fills up said container, it flows out by means of pipeline 15 and it fills up container 7.
• the losses of pressure of a plate-like heat exchanger may be set to about 5 metres, while the losses of pressure of a heat exchanger according to the invention range between 0,3 and 0,5 metres.
• the heat exchanger according to the invention may practically be used for any application requiring a thermal exchange to be carried out between two fluids of any kind, either gases or liquids.
• such a heat exchanger is modular.
• the thermal power of the heat exchanger may be modified by simply increasing or decreasing the length of containers 3, 7, what involves a remarkable saving during the production steps of the heat exchanger.
• Figure 3 shows a particularly advantageous application of the invention, according to which the heat ecxhanger is used for building a combined water and air heating apparatus.
• Apparatus 20 is housed within a receptacle 21 and comprises a pair of tubular elongated containers 3, 7 as previously described.
• a first pipeline 4 is placed inside of container 3, while a second pipeline 5 is placed inside of container 7.
• the containers 3, 7 are provided with common upper and lower covers 1, 2.
• bottom cover 2 includes the inlet and outlet connectors of respective pipelines 4, 5, while upper cover 1 includes inlet connectors 22 for the fluid which fills containers 3, 7.
• upper cover 1 carries a series of connectors 23, 24, 25, 26 belonging to a fluid collector 27 which is generally placed on the top of upper cover 1.
• fluid collector 27 connected to a serpentine-like pipeline 28 belonging to an air/fluid heat exchanger 29,. on top of which a sucking fan 30 is placed.
• a first fluid e.g. water
• a first fluid e.g. water
• a second fluid is inlet into container 3 through connectors 22, and it fills up said container 3, it flows through connectors 23, 24, it fills up fluid collector 27, it flows through pipeline 28, then through connectors 25, 26 and it fills up container 7.
• resistors 31, 32 are connected to an electrical power supply, said resistors warm up the second fluid, and the heat is transferred by conduction to the same fluid which is present in collector 27 and in pipeline 28.
• Apparatus 20 has a second operating way, in the case where there are no resistors, and where the first fluid is inlet inside of the apparatus in a hot state, as coming from a boiler.
• the apparatus is provided with another pair of serpent ine-1 ike pipelines (not shown in the drawings) in which a third fluid flows, said first fluid heating up by thermal exchange the third fluid.
• the resistors may also be replaced by burners.
• the invention comprises several other forms of embodiment which fall within its scope.
• the invention comprises a form of embodiment according to which there is only one container inside of which the thermal exchange is carried out.
• the shape and the dimensions of the container(s) may be modified relative to those which are illustrated in the figures, in accordance to the equivalents' principle.
• the confi uration too, as well as the material constituting the pipeline which is placed inside of the container(s) may be widely modified.
• the invention comprises forms of embodiment according to which the serpentine constituting said pipeline may for instance be finned, or have the shape of a square conduit, and be made of a metallic material like copper, or of a synthetic material such as metacrylate.
• the latter form of embodiment is particularly advantageous in the case where the heat exchanger would operate in a strongly acid environment, as in the case of electrical accumulator batteries.
• the heat exchanger due to the extremely simple structure of the heat exchanger, its surfaces may be treated by means of, e.g., enamel or resin; the invention comprises a form of embodiment according to which the surface of each container and cover which contacts the fluid is provided with a teflon (TM) layer.
• TM teflon
• the heat exchanger is made to be particularly resisting against the action of chemical agents, whereby its use as water heater inside of boilers for producing hot water for heating and/or sanitary use becomes particularly interesting.
• the water heater's constituting elements are treated before the ultimate assembly, while state-of-the-art water heaters are internally glazed after the whole assembly having been previously welded.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Water Supply & Treatment (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=11427427

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Country Status (3)

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• 1991
  • 1991-12-09 IT ITVR910107A patent/IT1253145B/it active IP Right Grant
• 1992
  • 1992-12-04 WO PCT/IT1992/000156 patent/WO1993012389A1/en not_active Application Discontinuation
  • 1992-12-04 EP EP92924866A patent/EP0640200A1/de not_active Withdrawn

Non-Patent Citations (1)

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