EP0178351B1 - Chauffe-eau, par exemple chaudière d'eau sanitaire - Google Patents

Chauffe-eau, par exemple chaudière d'eau sanitaire Download PDF

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Publication number
EP0178351B1
EP0178351B1 EP19840201494 EP84201494A EP0178351B1 EP 0178351 B1 EP0178351 B1 EP 0178351B1 EP 19840201494 EP19840201494 EP 19840201494 EP 84201494 A EP84201494 A EP 84201494A EP 0178351 B1 EP0178351 B1 EP 0178351B1
Authority
EP
European Patent Office
Prior art keywords
container
water
sleeve
coil
boiler
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
Application number
EP19840201494
Other languages
German (de)
English (en)
Other versions
EP0178351A1 (fr
Inventor
Egbert Zijlstra
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.)
Heatex BV
Original Assignee
Plaatverwerkende Industrie van Wijk en Boerma BV
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 Plaatverwerkende Industrie van Wijk en Boerma BV filed Critical Plaatverwerkende Industrie van Wijk en Boerma BV
Priority to DE8484201494T priority Critical patent/DE3470943D1/de
Priority to EP19840201494 priority patent/EP0178351B1/fr
Publication of EP0178351A1 publication Critical patent/EP0178351A1/fr
Application granted granted Critical
Publication of EP0178351B1 publication Critical patent/EP0178351B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a hot water appliance, comprising a vertical container connected in the circuit of and positioned separately from a central heating boiler, a water circulation pump being provided in the circuit between the boiler and the container, a coil for trapping hot water being provided within the container, and one of said coil being connected to a water means and being provided adjacent to the container wall.
  • a similar appliance is known from NL-A-8300867.
  • the container is filled with boiler water (temperature 75-80°) and has a substantial capacity (e.g. 40 liters)
  • this appliance permits tapping hot water at constant temperature (e.g. 45°C) during a long period, via an automatic mixing device. Said period of course depends on the quantity of water which is tapped per unity of time.
  • the tap water temperature may be maintained still better if care is taken that the water in the container having the highest temperature is always directly adjacent to the coil. For it is that the temperature in the container is only at the same value all over the container in a condition of equilibrium, if for considerable time no water has been tapped. In summer the central heating boiler is not operative for heating radiators and therefore, if heat supply to the water boiler is necessary, initially colder water will be supplied thereto by the central heating boiler than the water already present in the container. It must be avoided that this water directly contacts the coil.
  • a sleeve with a closed wall and open top has been provided within the container parallel to the vertical container wall, said sleeve extending to close to the container top and being closed at the under side by a bottom, the flow cross-section outside the sleeve being a couple of times smaller than that within the sleeve, the sleeve constituting a large part of the total container volume, the central heating water supply conduit opening centrally through said bottom within the sleeve in the container, the central heating water return conduit being connected to the container bottom.
  • a similar hot water appliance also having a sleeve with open top within the tapping water coil and connected at the bottom with the central heating circuit is known from DE-C-719976.
  • DE-C-719976 A similar hot water appliance, also having a sleeve with open top within the tapping water coil and connected at the bottom with the central heating circuit is known from DE-C-719976.
  • this relates to a hot water appliance which is built on top of and positioned separately from said boiler.
  • This causes heavy heat losses from the hot water supply in the container and in the heating boiler since this communicates with cold outside air through the chimney stack channel when the boiler is inoperative such as in summer.
  • the water in the container and the boiler will have to be kept at high temperature, whereby high heat losses will occur.
  • the known apparatus operates through the thermosyphon-effect, whereby the water in the heating boiler only moves upwardly into the hot water appliance, if it has been heated to a somewhat higher temperature than the temperature present in that appliance.
  • the cold heating boiler water will move upwardly immediately when the operation of the boiler is started through a thermostat signal indicating that the hot water temperature decreases below the set value, within the sleeve adjacent to its sidewall, i.e. close to the coil, whereby this coil is cooled.
  • the sleeve having the closed bottom provides for entering the central heating water centrally into the sleeve, whereby it is mixed with water present in the sleeve and thereby heated before it reaches the coil. Thereby losses due to inoperation of the central heating boiler are minimized.
  • DE-C-1000585 reveals a hot water sup- pliance, comprising a vertical container connected in the circuit of a central heating boiler and having a hot water tapping coil.
  • the hot water discharge pipe of the central heating apparatus is upwardly extended within the boiler to close to the container top.
  • This pipe only forms a small part of the total container volume and is meant for first heating the water in the tapping coil before it is transmitted to the radiators. This is obtained by providing opening along the pipe so that the water is returned to the central heating boiler as long as it is not hot enough to reach the top of the pipe.
  • any hot water in the coil would be cooled by this returning water, which is exactly what the present invention intends to avoid.
  • the invention is specially of importance by the tendency of the later years to reduce the boiler capacity of the central heating installation for houses. This has been reduced e.g. from 20 to 5 kw in connection with the smaller heat requirement as a result of better isolation of the houses. Thereby it takes longer before, after a period in which the burners have not been operative, the central heating boiler water is again at normal temperature.
  • the appliance is constructed such that the inlet end and the outlet end of the coil are provided at the underside of the container,
  • the circuit as shown in figure 1 comprises a cold water supply line 20, e.g. connected to a water mains, said line having a control valve 1, a check valve 2 and a stop valve 3 and leading to the appliance, e.g. a domestic boiler, said line being connected to the heat exchanger as formed by a coil 7 of said appliance, the water reservoir or container of which bears the reference number 8.
  • the coil leaves the container at its underside and is connected to a line 21 which is also connected to the output of an automatic mixing valve or automatic mixing device 6, the input.of which is connected by a conduit 22 to the cold water supply line 20.
  • the line 21 constitutes the tap line of the appliance.
  • the automatic mixing device 6 also has a hot water output to a conduit 23, from which hot tap water may be obtained from the appliance, e.g. water which is not mixed with cold water.
  • the supply of hot central heating boiler water to the container 8 of the appliance is obtained with a conduit 9 extending through he under-wall of the container and opening into the bottom 28 of the sleeve 27, which has an open top.
  • Said conduit 9 is connected through a three-way valve 10 and a conduit 24 to the output of the central heating boiler 12, while also radiators 11 are connected to said boiler through the conduit 24 and the three-way valve 10.
  • the heating water in the container 8 leaves the container at the underside through a condit 25, which opens in the wall of the container bottom in the area between the sleeve 27 and the wall of the container 8.
  • Said conduit is connecfed through a pump 13 to the water input of the boiler 12.
  • the return conduits 26 of the radiators 11 are likewise connected to the return line 25.
  • the primary or heating water leaving the boiler through the conduit 24 has a maximum temperature which is adjustable through the boiler thermostat 14 and said temperature e.g. has the value of 90°C.
  • the temperature of the heating water in the container 8 is then e.g. 75-80°C.
  • the boiler container 8 is shown on an enlarged scale in figure 2 together with the different lines connected thereto.
  • the sleeve 27 is provided, said sleeve having bottomn 28.
  • the central heating water supply line 9 opens.
  • the coil 7 is provided, as seen in the radial direction, substantially half betwen the wall of the container 8 and the vertical wall of the sleeve 27.
  • the cold water supply end of the coil enters, in the embodment shown, the underside of the container 8. From the upper end of the coil 7 an end portion 29 extends within the sleeve 27 downwardly, passes in sealed manner through the bottom 28 thereof and subsequently passes the container bottom.
  • the return line 25 between container and the boiler likewise leaves the container 4 at the underside.
  • the warmest water is concentrated by the sleeve on the coil, which improves the heat transmission thereto.
  • the flow cross-section outside the sleeve is a couple of times smaller than that within the sleeve, whereby the flow velocity along the coil is proportionally increases.
  • the temperature measuring element or sensor 30a of a thermostat 30 is provided substantially at half the height of the container 8 against its outer wall. It has appeared that this is the best position in order to keep the tap temperature constant. Said thermostat is electrically connected to the central heating boiler.
  • the new appliance may be connected to all existing and new central heating boilers, which are suitable for connection with a hot water storage reservoir.
  • the appliance according to the invention permits tapping water having a constant temperature during a long period, during which the temperature differences are very small, smaller than 1°C. Due to the presence of the automatic mixing device the tap water temperature is not influenced by a somewhat higher or lower temperature of the primary heating water.
  • a different heating source may be used. Particularly e.g. connection to a city heating system or to a heat pump may be practiced, in which also the superheat of the compressed gases in the primary circuit may be used for reaching a temperature of 70-75C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Cookers (AREA)
  • Commercial Cooking Devices (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (2)

1. Appareil à eau chaude, comprenant un réservoir (8) vertical relié dans le circuit d'une chaudière de chauffage central et prevu séparé de ladite chaudière, une pompe (13) à circulation d'eau, prévue dans le circuit (25) entre la chaudière (12) et le réservoir (8), un serpentin (7) pour tirer d'eau chaude étant prévu à l'intérieur du réservoir (8), une extrémité dudit sepentin étant reliée à une amenée d'eau (20) et étant prevue proche de la paroi du réservoir, caractérisé en ce qu'une boîte (27) avec paroi fermée et extrémité supérieure ouverte a été prevue à l'intérieur de réservoir (8) en parallèle à la paroi de verticale du réservoir à l'autre côte du serpentin (7) que la paroi du réservoir, ladite boîte s'étendent à près de l'extrémité supérieure du réservoir et étant fermée à l'extrémite inférieure par un fond (28), la section transversale de passage de la boîte étant un nombre de fois plus petite que la section transversale à intérieure de la boîte, la boîte (27) représentant une grande partie du volume totale du réservoir (8), la conduite (9) d'arrivée d'eau de chauffage central se terminant dans la centre à travers le dit fond à l'intérieur de la boîte (27) dans le réservoir (8), la conduite (25) de retour d'eau de chauffage central étant reliée au fond du réservoir.
2. Appareil selon la revendication 1, caractérisé en ce que l'extrémité d'entrée et l'extrémité d'échappement du serpentin (7) sont prévues au côté inférieur du réservoir (8)
EP19840201494 1984-10-15 1984-10-15 Chauffe-eau, par exemple chaudière d'eau sanitaire Expired EP0178351B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8484201494T DE3470943D1 (en) 1984-10-15 1984-10-15 Water heating appliance e.g. a domestic boiler
EP19840201494 EP0178351B1 (fr) 1984-10-15 1984-10-15 Chauffe-eau, par exemple chaudière d'eau sanitaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19840201494 EP0178351B1 (fr) 1984-10-15 1984-10-15 Chauffe-eau, par exemple chaudière d'eau sanitaire

Publications (2)

Publication Number Publication Date
EP0178351A1 EP0178351A1 (fr) 1986-04-23
EP0178351B1 true EP0178351B1 (fr) 1988-05-04

Family

ID=8192490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840201494 Expired EP0178351B1 (fr) 1984-10-15 1984-10-15 Chauffe-eau, par exemple chaudière d'eau sanitaire

Country Status (2)

Country Link
EP (1) EP0178351B1 (fr)
DE (1) DE3470943D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8801891A (nl) * 1988-07-27 1990-02-16 Meppeler Maschf Nv Tapwater-verwarmingsinrichting.
WO1990008292A1 (fr) * 1989-01-21 1990-07-26 Volker Stragies Procede et dispositif pour la preparation d'eau chaude
EP0334797A3 (en) * 1988-03-24 1990-08-16 Joh. Vaillant Gmbh U. Co. Hot-water tank
EP0819892A2 (fr) 1996-07-17 1998-01-21 KME Schmöle GmbH Echangeur de chaleur pour la production d'eau sanitaire
DE29819326U1 (de) * 1998-10-29 2000-02-24 Würthner, Holger, 78054 Villingen-Schwenningen Durchlauferhitzer mit verbessertem Wirkungsgrad

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19906180C2 (de) * 1999-02-05 2003-02-06 Peter Rehberg Plattenwärmeübertrager für Warmwasserbereitung und -speicherung
DE102004017532A1 (de) * 2004-04-08 2005-11-03 Wolf Gmbh Wasserspeicher, insbesondere Schichtenspeicher
USD800878S1 (en) * 2016-05-26 2017-10-24 William Pinkerman Multi-heater

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE719976C (de) * 1935-10-29 1942-04-21 Buderus Eisenwerk Mit einer Warmwasserheizungsanlage vereinigter Gebrauchswassererhitzer
DE1753300B2 (de) * 1968-01-13 1973-06-28 Joh Vaillant KG, 5630 Remscheid Brauchwasserbereiter fuer eine warmwasser-umlaufheizungs-anlage
NL8300867A (nl) * 1983-03-09 1983-09-01 Plaatverwerkende Ind Van Wijk Warmwatertoestel, bijvoorbeeld huishoudboiler.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334797A3 (en) * 1988-03-24 1990-08-16 Joh. Vaillant Gmbh U. Co. Hot-water tank
NL8801891A (nl) * 1988-07-27 1990-02-16 Meppeler Maschf Nv Tapwater-verwarmingsinrichting.
EP0355881A1 (fr) * 1988-07-27 1990-02-28 N.V. Meppeler Machinefabriek Appareil pour chauffer de l'eau sanitaire
WO1990008292A1 (fr) * 1989-01-21 1990-07-26 Volker Stragies Procede et dispositif pour la preparation d'eau chaude
EP0819892A2 (fr) 1996-07-17 1998-01-21 KME Schmöle GmbH Echangeur de chaleur pour la production d'eau sanitaire
DE29819326U1 (de) * 1998-10-29 2000-02-24 Würthner, Holger, 78054 Villingen-Schwenningen Durchlauferhitzer mit verbessertem Wirkungsgrad

Also Published As

Publication number Publication date
EP0178351A1 (fr) 1986-04-23
DE3470943D1 (en) 1988-06-09

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