EP0990849B1 - Überhitzungs-Überwachungsvorrichtung eines Heisswassererzeugers mit einer durchbohrte Membran - Google Patents

Überhitzungs-Überwachungsvorrichtung eines Heisswassererzeugers mit einer durchbohrte Membran Download PDF

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Publication number
EP0990849B1
EP0990849B1 EP99402391A EP99402391A EP0990849B1 EP 0990849 B1 EP0990849 B1 EP 0990849B1 EP 99402391 A EP99402391 A EP 99402391A EP 99402391 A EP99402391 A EP 99402391A EP 0990849 B1 EP0990849 B1 EP 0990849B1
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EP
European Patent Office
Prior art keywords
cold
membrane
hot
chamber
water
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.)
Expired - Lifetime
Application number
EP99402391A
Other languages
English (en)
French (fr)
Other versions
EP0990849A1 (de
Inventor
Jean-Michel Georges Marie Porcher
Jean Berthelo
Philippe Varin
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.)
Chaffoteaux et Maury SAS
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Chaffoteaux et Maury SAS
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Application filed by Chaffoteaux et Maury SAS filed Critical Chaffoteaux et Maury SAS
Publication of EP0990849A1 publication Critical patent/EP0990849A1/de
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means

Definitions

  • the present invention relates to a device to control the overheating of a hot water generator.
  • Hot water generators usually encountered include a cold water inlet pipe connected to a cold water circuit and an outlet pipe hot water connected to a hot water circuit, a heat exchanger heat being interposed between the cold water circuit and the hot water circuit and a burner provides heat to the audit exchanger.
  • a generator is known from FR-A-2 609 162.
  • the hot water generator is conventionally equipped a device for controlling the overheating of water present in the exchanger, this device comprising usually an enclosure divided by a membrane deformable into a cold room and a hot room, the deformable membrane having a first face and a second side respectively facing the cold room and towards the hot room, the cold room being subjected to the pressure in the cold water circuit and the chamber hot being subjected to the pressure prevailing in the circuit hot water, so the deformable membrane is displaceable under the pressure difference between the cold and hot rooms.
  • the object of the present invention is to remedy the disadvantages mentioned above by proposing a device for control which improves the action of the water injected into the exchanger when the water supply stops, and this by means of simple, effective and inexpensive means.
  • a device for control of the aforementioned type is essentially characterized by what the control device includes means for limitation of the rise in temperature of the water contained in the cold room.
  • the device according to the invention allows to return to the heat exchanger, when the drawing, water that is really cold compared to hot water temperature.
  • the hot water generator 1 shown in the figures 1 and 2 comprises, in a manner known per se, a pipe cold water inlet 2 connected to a cold water circuit 3, a hot water outlet pipe 4 connected to a circuit hot water 5, a heat exchanger 6 interposed between the cold water circuit 3 and hot water circuit 5 and one fluid fuel burner 7 that transfers heat to the heat exchanger 6.
  • the fluid fuel used here is natural gas which when a user draws water hot ( Figure 2), burns forming a flame ramp 8 whose heat is transferred to the heat exchanger 6 placed above the burner 7 to heat the circulating water in this exchanger.
  • Natural gas is delivered to burner 7 according to the direction of arrows F via a power supply 10.
  • the gas flow through the supply 10 is regulated by a valve 11 which is connected to a device 12 control of the gas inlet to the burner, to the passage of cold water in the cold water circuit 3.
  • the valve 11 consists of a valve head 13 integral with a valve stem 14 whose movement is linked to the servo device 12.
  • the valve head 13 is biased by a spring 15 bearing against a seat of valve 16 formed in the gas inlet pipe 10.
  • the servo device 12 known per se, is consisting of a reservoir 20 disposed in the input circuit cold water 3 downstream of which is disposed, relative to the flow direction F1 of cold water, a venturi 21.
  • a mobile element 22, placed in the tank 20 moves in depending on the pressure difference between its two sides. The value of the pressure difference is caused by the venturi and is related to the flow of cold water in the cold water inlet circuit 3.
  • On the element displaceable 22 is mounted the rod 14 of the valve 11.
  • the hot water generator is provided with in addition to a device 30 for controlling the overheating of hot water.
  • This control device includes a enclosure 31 divided into a cold room 32 and a hot chamber 33 by a deformable membrane 34.
  • the cold room 32 is connected to the pipe cold water inlet 2 through a pipe 35 while the hot chamber 33 is connected to the hot water outlet 4 by tubing 36.
  • the cold room is subjected to the pressure in the cold water inlet pipe 2 and the hot chamber 33 is subjected to the pressure prevailing in the hot water outlet pipe 5.
  • the deformable membrane 34 is therefore movable under the difference of pressure between the cold and hot rooms.
  • the membrane 34 is resiliently recalled in direction of the cold room 32 by a spring of compression 40 which is interposed between the bottom of the chamber hot 33 and the second face 38 of this membrane.
  • the membrane 34 is substantially shaped in spherical cap so as to match the walls of cold rooms 32 and 33 which are themselves convex.
  • the membrane 34 is shaped approximately cylindrical with axis X-X, the bottom of which is curved and whose height is low compared to the bottom.
  • the membrane 34 is made of a deformation material elastic and has a small thickness by relative to the diameter of the spherical cap.
  • the S summit of the spherical cap is thicker so to constitute a support stop 51 projecting from the second face 38.
  • the compression spring 40 is in stop on the second face 38 of the membrane by via a ring-shaped plate 52 itself fitted on the support stop 51 and on the second face 38.
  • the control device 30 is located in the vicinity of the hot water circuit 5, which causes when drawing hot water, warming the cold water contained in cold room 32 ( Figure 2). To avoid the rise in temperature of this water, the control device 30 has means 45 for limiting the rise in temperature of the water in the cold room 32 ( Figures 3 and 4).
  • the limiting means 45 are carried by the deformable membrane 34 and consist of a passage 46 which radially passes through this membrane.
  • the passage 46 is on the X-X axis.
  • the passage 46 leads to the first face 37 by an orifice 47 and on the second face 38 by an orifice 48. These orifices are, in cross section, of good surface greater than that of passage 46.
  • the first face 37 of the membrane 34 is further provided lugs 50 regularly distributed and which project in direction of the cold room 32. These pins prevent a too strong adhesion of the membrane 34 to the bottom of the chamber cold 32 and facilitates the detachment of this membrane during hot water.
  • the passage 46 allows, in the water withdrawal position hot, a flow of cold water contained in the cold room 32 to hot room 33. This flow is favored by the pressure in the cold room 32 which is higher than the pressure prevailing in the chamber hot 33. This flow causes the renewal of cold water in cold room 32 and prevents the rise in temperature of this water.
  • passage 46 does not affect almost no difference in pressure between the cold room 32 and hot room 33.
  • the means 45 for limiting the rise in cold water can take any other than a passage 46, such as a conduit located outside enclosure 30 and which communicates cold rooms 32 and hot rooms 33.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Control Of Combustion (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Claims (7)

  1. Überhitzungsüberwachungsvorrichtung eines Heißwassererzeugers (1), wobei der Heißwassererzeuger (1) ein an eine Kaltwasserleitung (3) angeschlossenes Kaltwasserzutrittsrohr (2) und ein an eine Heißwasserleitung (5) angeschlossenes Heißwasseraustrittsrohr (4) umfaßt, wobei die Überhitzungsüberwachungsvorrichtung (30) einen abgeschlossenen Raum (31) enthält, der durch eine verformbare Membran (34) in eine Kaltkammer (32) und eine Heißkammer (33) aufgeteilt ist, wobei die verformbare Membran (34) eine erste Fläche (37) und eine zweite Fläche (38) besitzt, die zur Kaltkammer (32) bzw. zur Heißkammer (33) hin gewandt sind, wobei die Kaltkammer (32) dem in der Kaltwasserleitung (3) herrschenden Druck ausgesetzt ist und die Heißkammer (33) dem in der Heißwasserleitung (5) herrschenden Druck ausgesetzt ist, so daß die verformbare Membran (34) unter der Druckdifferenz, die zwischen der Kalt- (32) und der Heißkammer (33) besteht, beweglich ist, dadurch gekennzeichnet, daß die Überwachungsvorrichtung (30) Mittel (45) zur Begrenzung des Temperaturanstiegs des in der Kaltkammer (32) enthaltenen Wassers umfaßt.
  2. Überwachungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel (45) zur Begrenzung des Temperaturanstiegs des in der Kaltkammer (32) enthaltenen Wassers durch die verformbare Membran (34) gehalten werden.
  3. Überwachungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Mittel (45) zur Begrenzung des Temperaturanstiegs des in der Kaltkammer (32) enthaltenen Wassers wenigstens einen Durchlaß (46) umfassen, der die Membran (34) durchquert, so daß das in der Kaltkammer (32) enthaltene kalte Wasser zur Heißkammer (33) hin fließt, wobei sich so das in der Kaltkammer (32) enthaltene Wasser erneuert.
  4. Überwachungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Durchlaß (46) zwei Öffnungen (47, 48) besitzt, die in die erste (37) und zweite (38) Fläche dieser Membran (34) münden, wobei die Querschnittsfläche der Öffnungen (47, 48) größer als diejenige des Durchlasses (46) ist.
  5. Überwachungsvorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die bewegliche Membran (34) im wesentlichen die Form einer Kugelkalotte hat, wobei der durchquerende Durchlaß (46) im wesentlichen radial ist und am Scheitelpunkt (S) der Kugelkalotte liegt.
  6. Überwachungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß sie außerdem Rückstellmittel (40) der Membran (34) zum Verringern des Volumens der Kaltkammer (32) umfaßt und die zweite Fläche (38) der Membran (34) ein Abstützelement (51) der Rückstellmittel (40) enthält, wobei das Abstützelement (51) mit dem Durchlaß (46) gleichachsig ist.
  7. Überwachungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die erste Fläche (37) der Membran (34) mit zur Kaltkammer (32) hin vorstehenden Vorsprüngen (50) versehen ist.
EP99402391A 1998-10-02 1999-09-30 Überhitzungs-Überwachungsvorrichtung eines Heisswassererzeugers mit einer durchbohrte Membran Expired - Lifetime EP0990849B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9812371 1998-10-02
FR9812371A FR2784174B1 (fr) 1998-10-02 1998-10-02 Dispositif de controle de la surchauffe d'un generateur d'eau chaude a membrane deplacable percee

Publications (2)

Publication Number Publication Date
EP0990849A1 EP0990849A1 (de) 2000-04-05
EP0990849B1 true EP0990849B1 (de) 2002-04-03

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ID=9531135

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Application Number Title Priority Date Filing Date
EP99402391A Expired - Lifetime EP0990849B1 (de) 1998-10-02 1999-09-30 Überhitzungs-Überwachungsvorrichtung eines Heisswassererzeugers mit einer durchbohrte Membran

Country Status (10)

Country Link
EP (1) EP0990849B1 (de)
AT (1) ATE215681T1 (de)
DE (1) DE69901146T2 (de)
DZ (1) DZ2900A1 (de)
ES (1) ES2175909T3 (de)
FR (1) FR2784174B1 (de)
HK (1) HK1027152A1 (de)
MA (1) MA24988A1 (de)
PT (1) PT990849E (de)
TR (1) TR199902412A2 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110806013A (zh) * 2019-11-08 2020-02-18 华帝股份有限公司 零冷水燃气热水器的控制方法及零冷水燃气热水器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5546313A (en) * 1978-09-27 1980-04-01 Hitachi Ltd Water boiler
FR2609162B1 (fr) * 1986-12-24 1989-06-30 Commissariat Energie Atomique Dispositif de controle de la surchauffe et de l'entartrage pour un appareil de chauffage d'un fluide et appareil equipe d'un tel dispositif

Also Published As

Publication number Publication date
TR199902412A3 (tr) 2000-05-22
DZ2900A1 (fr) 2004-03-01
DE69901146D1 (de) 2002-05-08
ATE215681T1 (de) 2002-04-15
FR2784174A1 (fr) 2000-04-07
HK1027152A1 (en) 2001-01-05
MA24988A1 (fr) 2000-04-01
DE69901146T2 (de) 2002-11-21
TR199902412A2 (xx) 2000-05-22
EP0990849A1 (de) 2000-04-05
PT990849E (pt) 2002-09-30
FR2784174B1 (fr) 2000-12-15
ES2175909T3 (es) 2002-11-16

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