EP1336812A1 - Heat exchanger, in particular usable as a towel heater - Google Patents

Heat exchanger, in particular usable as a towel heater Download PDF

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Publication number
EP1336812A1
EP1336812A1 EP03000711A EP03000711A EP1336812A1 EP 1336812 A1 EP1336812 A1 EP 1336812A1 EP 03000711 A EP03000711 A EP 03000711A EP 03000711 A EP03000711 A EP 03000711A EP 1336812 A1 EP1336812 A1 EP 1336812A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
outlet
diffuser conduit
conduit
diffuser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03000711A
Other languages
German (de)
French (fr)
Inventor
Claudio Bianchini
Michele Landini
Daniele Vecchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Immergas SpA
Original Assignee
Immergas SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Immergas SpA filed Critical Immergas SpA
Publication of EP1336812A1 publication Critical patent/EP1336812A1/en
Withdrawn legal-status Critical Current

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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
    • F28D1/053—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
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • 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
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • 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
    • F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators
    • F28D2021/0036—Radiators for drying, e.g. towel radiators

Definitions

  • the present invention relates to a heat exchanger, in particular usable as a towel heater, comprising at least a bank of tubular bodies connected to a delivery manifold that feeds them with a heating fluid.
  • the manifold is provided in its interior with a diffuser conduit, in order to assure a substantially equal distribution of the heating fluid inside the tubular bodies.
  • heat exchangers are known for heating the space and the laundry, constituted metal tubes traversed by a heating fluid, generally hot water.
  • the heat transported by the fluid is transferred to the metallic parts of the tubes and subsequently dispersed into the space and/or transferred to the laundry.
  • the quantity of the heat exchanged is a function of the temperature difference existing between the heating fluid and the environment, of the nature of the metal, of the motion of the fluid relative to the walls and of the geometry and dimensions of the exchanger.
  • the time necessary for the heat exchanger to reach the steady state temperature, as well as the energy efficiency of the exchanger itself, are an essential factor for users' comfort and a determining one for energy conservation.
  • An aim of the present invention is to eliminate the aforesaid drawbacks making available a heat exchanger, in particular usable as a towel heater, with high energy efficiency and able rapidly to reach steady state temperature.
  • Another aim of the present invention is to propose a heat exchanger that is economical to produce and can constitute a furnishing element.
  • the heat exchanger is globally indicated with the reference number 1 and is preferably made of steel and/or of copper and/or of aluminium.
  • the exchanger 1 comprises four banks 2, 3, 4, 5 of tubular bodies 6 connected to a delivery manifold 7 that feeds them with a pressurised heating fluid, preferably hot water with a delivery pressure in the order to 10 bar.
  • the manifold 7 is provided in its interior with a diffuser conduit 8, in order to assure a substantially equal distribution of the heating fluid within the tubular bodies 6 of the various banks.
  • the diffuser conduit 8 has an outflow mouth or outlet 9 originally inclined relative to a longitudinal axis of the diffuser conduit itself.
  • the inclination of the outlet 9 is preferably between about 20° and 60° and the diffuser conduit 8 has a thickness preferably between 0.5 ⁇ 0.2 millimetres and 2.5 ⁇ 0.2 millimetres.
  • the diffuser conduit 8 has a substantially circular cross section and therefore the outlet 9, being inclined, assumes a substantially elliptical shape.
  • the manifold 7, instead, has a preferably elliptical cross section.
  • the diffuser conduit 8 develops inside the manifold 7 for a sufficient length to assure the circulation of the hot water in all the tubular bodies 6 of each bank.
  • the hot water flows in the diffuser 8 until arriving in correspondence with the outlet 9, wherefrom it exits and enters a terminal portion of the manifold 7, in such a way as to flow in the tubular bodies 6 more distant from the hot water inflow area.
  • the presence of an inclined outlet 9 generates such a fluid dynamic field as to cause the motion of the fluid to transition from laminar to turbulent, thereby allowing a more effective heat exchange between the hot water and the walls of the tubular bodies 6.
  • the diffuser conduit 8 has a substantially rectangular cross section that maintains said shape, possibly only more elongated, also in correspondence with the outlet 9.
  • the outlet 9, seen in a longitudinal plane parallel to the axis of the diffuser conduit 8, has a double inclination and is substantially shaped as an inverse V.
  • the outlet 9 seen in a longitudinal plane parallel to the axis of the conduit is substantially W shaped.
  • the four banks 2, 3, 4, 5 are constituted respectively by thirteen, ten, five and five tubular bodies 6.
  • the banks 2, 3, 4, 5 are connected to a second manifold 10 for the return of the heating fluid.
  • the invention achieves important advantages.
  • such a heat exchanger thanks to the high degree of turbulence generated in the heating fluid by the inclined outlet, has a high energy efficiency and is able rapidly to reach the steady state temperature.
  • the heat exchanger of the invention is economical to produce and can constitute a furnishing element.

Landscapes

  • 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)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

Heat exchanger(1) in particular usable as a towel heater, comprising at least a bank (2, 3, 4, 5) of tubular bodies (6) connected to at least a delivery manifold (7) that feeds them with a heating fluid. The manifold (7) is provided in its interior with at least a diffuser conduit (8) to assure a substantially equal distribution of the heating fluid inside the tubular bodies (6). The diffuser conduit (8) has an outlet (9) originally inclined relative to a longitudinal axis of the diffuser conduit (8) itself.
Figure 00000001

Description

  • The present invention relates to a heat exchanger, in particular usable as a towel heater, comprising at least a bank of tubular bodies connected to a delivery manifold that feeds them with a heating fluid. The manifold is provided in its interior with a diffuser conduit, in order to assure a substantially equal distribution of the heating fluid inside the tubular bodies.
  • In the field of thermal and sanitary systems for home use, heat exchangers are known for heating the space and the laundry, constituted metal tubes traversed by a heating fluid, generally hot water.
  • The heat transported by the fluid is transferred to the metallic parts of the tubes and subsequently dispersed into the space and/or transferred to the laundry.
  • The quantity of the heat exchanged is a function of the temperature difference existing between the heating fluid and the environment, of the nature of the metal, of the motion of the fluid relative to the walls and of the geometry and dimensions of the exchanger.
  • The time necessary for the heat exchanger to reach the steady state temperature, as well as the energy efficiency of the exchanger itself, are an essential factor for users' comfort and a determining one for energy conservation.
  • Generally, energy efficiency and the speed in reaching the steady state temperature are very limited in the heat exchangers currently available on the market, due to the difficulty in causing a sufficiently turbulent motion of the heating fluid.
  • An aim of the present invention is to eliminate the aforesaid drawbacks making available a heat exchanger, in particular usable as a towel heater, with high energy efficiency and able rapidly to reach steady state temperature.
  • Another aim of the present invention is to propose a heat exchanger that is economical to produce and can constitute a furnishing element.
  • Said aims are fully achieved by the heat exchanger of the present invention, which is characterised by the content of the claims set out below and in particular in that the diffuser conduit has an outlet that is inclined relative to a longitudinal axis of the diffuser conduit itself.
  • This and other characteristics shall become more readily apparent from the following description of a preferred embodiment illustrated, purely by way of non limiting example, in the accompanying drawing table, in which:
    • Figure 1 shows a global front view of a heat exchanger according to the invention;
    • Figures 2 and 3 respectively show a lateral view and a plan view, with some parts removed the better to highlight others, of a detail of a delivery conduit with, in its interior, a diffuser conduit for the heat exchanger shown in Figure 1.
  • With reference to the figures, the heat exchanger is globally indicated with the reference number 1 and is preferably made of steel and/or of copper and/or of aluminium.
  • In the preferred embodiment, the exchanger 1 comprises four banks 2, 3, 4, 5 of tubular bodies 6 connected to a delivery manifold 7 that feeds them with a pressurised heating fluid, preferably hot water with a delivery pressure in the order to 10 bar. The manifold 7 is provided in its interior with a diffuser conduit 8, in order to assure a substantially equal distribution of the heating fluid within the tubular bodies 6 of the various banks.
  • The diffuser conduit 8 has an outflow mouth or outlet 9 originally inclined relative to a longitudinal axis of the diffuser conduit itself. In the illustrated example, the inclination of the outlet 9 is preferably between about 20° and 60° and the diffuser conduit 8 has a thickness preferably between 0.5±0.2 millimetres and 2.5±0.2 millimetres.
  • Inn the preferred embodiment, the diffuser conduit 8 has a substantially circular cross section and therefore the outlet 9, being inclined, assumes a substantially elliptical shape. The manifold 7, instead, has a preferably elliptical cross section.
  • The diffuser conduit 8 develops inside the manifold 7 for a sufficient length to assure the circulation of the hot water in all the tubular bodies 6 of each bank. The hot water flows in the diffuser 8 until arriving in correspondence with the outlet 9, wherefrom it exits and enters a terminal portion of the manifold 7, in such a way as to flow in the tubular bodies 6 more distant from the hot water inflow area. The presence of an inclined outlet 9 generates such a fluid dynamic field as to cause the motion of the fluid to transition from laminar to turbulent, thereby allowing a more effective heat exchange between the hot water and the walls of the tubular bodies 6.
  • In a second embodiment (not shown herein), the diffuser conduit 8 has a substantially rectangular cross section that maintains said shape, possibly only more elongated, also in correspondence with the outlet 9.
  • In a third embodiment (not shown) herein, the outlet 9, seen in a longitudinal plane parallel to the axis of the diffuser conduit 8, has a double inclination and is substantially shaped as an inverse V.
  • In a fourth embodiment (not shown), the outlet 9, seen in a longitudinal plane parallel to the axis of the conduit, is substantially W shaped.
  • In the preferred embodiment, the four banks 2, 3, 4, 5 are constituted respectively by thirteen, ten, five and five tubular bodies 6.
  • Lastly, the banks 2, 3, 4, 5 are connected to a second manifold 10 for the return of the heating fluid.
  • The invention achieves important advantages.
  • First of all, such a heat exchanger, thanks to the high degree of turbulence generated in the heating fluid by the inclined outlet, has a high energy efficiency and is able rapidly to reach the steady state temperature.
  • Advantageously, the heat exchanger of the invention is economical to produce and can constitute a furnishing element.

Claims (11)

  1. Heat exchanger(1) in particular usable as a towel heater, comprising at least a bank (2, 3, 4, 5) of tubular bodies (6) connected to at least a delivery manifold (7) that feeds them with a heating fluid, said manifold (7) being provided in its interior with at least a diffuser conduit (8) to assure a substantially equal distribution of the heating fluid inside the tubular bodies (6), characterised in that the diffuser conduit (8) has an outlet (9) inclined relative to a longitudinal axis of the diffuser conduit (8) itself.
  2. Heat exchanger as claimed in claim 1, characterised in that the inclination of the outlet (9) is between about 20° and 60° relative to the longitudinal of the diffuser conduit (8).
  3. Heat exchanger as claimed in claim 1, characterised in that the diffuser conduit (8) has a substantially circular cross section.
  4. Heat exchanger as claimed in claim 3, characterised in that the outlet (9) is elliptical.
  5. Heat exchanger as claimed in claim 1, characterised in that the diffuser conduit (8) has a substantially rectangular cross section.
  6. Heat exchanger as claimed in claim 5, characterised in that the outlet (9) is rectangular.
  7. Heat exchanger as claimed in claim 1, characterised in that the outlet (9) has a double inclination and, seen in a longitudinal plane parallel to the axis of the diffuser conduit (8), is substantially shaped as an inverse V.
  8. Heat exchanger as claimed in claim 1, characterised in that the outlet (9), seen in a longitudinal plane parallel to the axis of the diffuser conduit (8), is substantially shaped as a "W".
  9. Heat exchanger as claimed in claim 1, characterised in that it comprises four banks (2, 3, 4, 5) having respectively thirteen, ten, five and five tubular bodies (6) each.
  10. Heat exchanger as claimed in claim 1, characterised in that the delivery manifold (7) has a substantially elliptical cross section.
  11. Towel heater, characterised in that it is obtained by means of a heat exchanger (1) as claimed in any of the previous claims.
EP03000711A 2002-02-15 2003-01-13 Heat exchanger, in particular usable as a towel heater Withdrawn EP1336812A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR20020002 ITPR20020002U1 (en) 2002-02-15 2002-02-15 HEAT EXCHANGER, IN PARTICULAR USABLE AS A TOWEL RAIL.
ITPR20020002 2002-02-15

Publications (1)

Publication Number Publication Date
EP1336812A1 true EP1336812A1 (en) 2003-08-20

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EP03000711A Withdrawn EP1336812A1 (en) 2002-02-15 2003-01-13 Heat exchanger, in particular usable as a towel heater

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EP (1) EP1336812A1 (en)
IT (1) ITPR20020002U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2957411A1 (en) * 2010-03-09 2011-09-16 Frank Bauwens Towel warmer hot fluid circulation radiator for toilet, has pipe arranged in longitudinal tube, so that end of pipe is open and emerges in longitudinal tube at non-zero distance of transversal tube that is closest to inlet tube

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1155316A (en) * 1965-11-17 1969-06-18 Zehnder Ag Geb Improvements in or relating to Radiators for Central Hot-Water Heating Systems.
FR2479961A3 (en) * 1980-04-05 1981-10-09 Sueddeutsche Kuehler Behr Radiator assembly for motor vehicle - has tube with moulded plastics chamber ends with inlet and outlet connections
EP0564422A1 (en) * 1992-04-03 1993-10-06 INDUSTRIE PASOTTI S.p.A. Aluminium alloy heating body
BE1007008A3 (en) * 1993-04-21 1995-02-14 Vasco Naamloze Vennootschap Towel radiator
EP0928939A2 (en) * 1998-01-09 1999-07-14 N.V. Vasco Radiator with inner tube
DE20113730U1 (en) * 2001-08-24 2001-11-08 Kermi Gmbh Tubular heater

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1155316A (en) * 1965-11-17 1969-06-18 Zehnder Ag Geb Improvements in or relating to Radiators for Central Hot-Water Heating Systems.
FR2479961A3 (en) * 1980-04-05 1981-10-09 Sueddeutsche Kuehler Behr Radiator assembly for motor vehicle - has tube with moulded plastics chamber ends with inlet and outlet connections
EP0564422A1 (en) * 1992-04-03 1993-10-06 INDUSTRIE PASOTTI S.p.A. Aluminium alloy heating body
BE1007008A3 (en) * 1993-04-21 1995-02-14 Vasco Naamloze Vennootschap Towel radiator
EP0928939A2 (en) * 1998-01-09 1999-07-14 N.V. Vasco Radiator with inner tube
DE20113730U1 (en) * 2001-08-24 2001-11-08 Kermi Gmbh Tubular heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2957411A1 (en) * 2010-03-09 2011-09-16 Frank Bauwens Towel warmer hot fluid circulation radiator for toilet, has pipe arranged in longitudinal tube, so that end of pipe is open and emerges in longitudinal tube at non-zero distance of transversal tube that is closest to inlet tube

Also Published As

Publication number Publication date
ITPR20020002U1 (en) 2003-08-18

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