EP0366971B1 - Dispositif équipant un chauffe-eau pour l'empêcher de dégoutter - Google Patents

Dispositif équipant un chauffe-eau pour l'empêcher de dégoutter Download PDF

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Publication number
EP0366971B1
EP0366971B1 EP89118532A EP89118532A EP0366971B1 EP 0366971 B1 EP0366971 B1 EP 0366971B1 EP 89118532 A EP89118532 A EP 89118532A EP 89118532 A EP89118532 A EP 89118532A EP 0366971 B1 EP0366971 B1 EP 0366971B1
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EP
European Patent Office
Prior art keywords
water
chamber
valve
jet pump
hot 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
EP89118532A
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German (de)
English (en)
Other versions
EP0366971A1 (fr
Inventor
Franz Dr. Bogdanski
Ernst Appun
Klaus-Dieter Wahnschaffe
Klaus Schütz
Gerd Schultes
Robert Kreikenbohm
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.)
Stiebel Eltron GmbH and Co KG
Original Assignee
Stiebel Eltron GmbH and Co KG
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
Priority claimed from DE19883836877 external-priority patent/DE3836877C1/de
Application filed by Stiebel Eltron GmbH and Co KG filed Critical Stiebel Eltron GmbH and Co KG
Priority to AT89118532T priority Critical patent/ATE72893T1/de
Publication of EP0366971A1 publication Critical patent/EP0366971A1/fr
Application granted granted Critical
Publication of EP0366971B1 publication Critical patent/EP0366971B1/fr
Anticipated expiration legal-status Critical
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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
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks

Definitions

  • the invention relates to a device for avoiding dripping at an overflow open to the environment when heating up a low-pressure water reservoir, with a water jet pump in the cold water inlet of the water reservoir, which opens water at a suction opening from a chamber when opening a nozzle in the water path in front of the water reservoir sucks, with water flowing back into the chamber via the suction opening after the nozzle is closed, the suction opening to the environment is closed when the water is sucked out of the chamber, and the water-absorbing space of the chamber to the environment is closed when the Chamber is filled with water, and wherein the nozzle is connected via a pipe section with a mixing valve.
  • the water jet pump is placed in the cold water line to the low-pressure hot water tank, i.e. in a line section through which cold water flows only when hot water is requested through the appropriate position on a mixer valve of a fitting. This is because only as much hot water is pressed out of the water reservoir as cold water is flowing in at the same time. If the user wants to tap cold water, the mixing valve is adjusted so that bypassing the hot water tank and the water jet pump cold water is transferred directly to the overflow via the tap valve.
  • the disadvantage of this arrangement is that the water jet pump represents an additional pipe constriction, which in the case of low-pressure hot water storage tanks basically leads to an undesirable increase in pressure within the device during dispensing.
  • another disadvantage of this arrangement is that the water jet pump is in the hot water-carrying area, so that it is exposed to a considerable risk of calcification.
  • the object of the invention is to avoid the disadvantages mentioned above, i.e. to achieve that, on the one hand, the entire amount of water that can be taken from a hot water fitting is passed through the water jet pump, and this with a water temperature at which water hardly tends to precipitate lime.
  • the chamber need not be designed to be pressure-resistant.
  • the invention achieves this in that the water jet pump is arranged in the pipe section between the nozzle and the mixing valve. Further advantageous embodiments result from the subclaims.
  • FIG 1 is a pipe (1) coming from the house supply network downstream of a nozzle (2), which is connected via a pipe section (3) with a mixing valve (4).
  • the mixing valve (4) is set by means of a cam, whether the inflowing water with its total volume of the cold water inflow line (5) of a low-pressure hot water tank (9) is fed, which would be equivalent to a temperature setting "hot”; whether the total amount of water flowing in via the line (8) to the overflow (7) of the fitting is fed directly, which would be equivalent to a "cold” temperature setting; or whether it is achieved by an intermediate position that a partial amount of water is transferred to the storage, while another partial amount flows directly via the pipe (8) into the overflow (7), which would be equivalent to a temperature setting "medium”.
  • Cold water entering the cold water inflow line (5) simultaneously displaces hot water from the reservoir (9), which flows through the hot water pipe (6) into the overflow (7).
  • a water jet pump (10) is now arranged according to the invention, which is connected via a suction line (11) to a chamber (12) which has a suction opening (13), this suction opening (13 ) against the environment at least when the water is sucked out of the chamber (12), and that the water-absorbing space of the chamber (12) against the environment is at least closed when the chamber (12) is filled with water.
  • the chamber (12) itself can consist of a bellows, a hose or a balloon-like, elastic body. Care must be taken that the chamber (12) is constructed in such a way that it can withstand the negative pressure generated by the water jet pump and that it can at least withstand the pressure of the dripping water filling it.
  • Such a low-pressure mixing valve (15) is shown in FIG.
  • the line (1) coming from the house installation network which ends at a nozzle (2), from where a pipe section (3) branches off, which in turn ends in a mixing chamber (14).
  • the mixing chamber (14) is connected via a cam disc to a line (8) and a further bore which leads to the cold water inflow line (5), which in turn acts as an inflow line to the low-pressure accumulator.
  • the total amount of water drawn can now either be fed to the line (8) or to the cold water inflow line (5) leading to the low-pressure hot water tank (9), or the water flow to these two pipes can can also be divided in a mixing ratio so that water with a desired temperature flows out at the overflow (7).
  • a pipe section (3) which receives the water jet pump (10) is provided within the connection between the nozzle valve (2) and the mixing valve (4).
  • the pipe section (3) can be reached from the outside, so that a previously made water jet pump can be inserted into this pipe section and fixed there .
  • Such a separately manufactured water jet pump is shown in FIG. 4.
  • the water jet pump (10) can also be manufactured during the manufacture of the pipe section (3). This requires two drills, one at the front having the contour of the inlet cross-section and the other at the front having the contour of the outlet cross-section of the water jet pump (10). Both drills move during the manufacture of the Pipe section (3) and the water jet pump (10) on the same level to each other that they meet where the intake pipe (11) opens, in such a way that the intake pipe (11) opens into a region of the water jet pump (10) where it creates negative pressure when water flows through it.
  • the chamber (12) is connected to the suction line (11) in a manner not shown in FIG. 2.
  • the chamber (12) is preferably installed in the dead space behind a sink or sink, or behind the low-pressure hot water tank (9), so that it does not appear visually. A possibly defective chamber (12) can be easily replaced with a new one.
  • a check valve (16) is inserted into the line (8).
  • the check valve (16) has the task that the chamber (12) sucks back water only from the hot water tank (9) after a tap operation. This ensures that larger amounts of water can be sucked back, for example when a larger hot water tank is operated, which inevitably produces more expansion water during a heating process. With this measure, not only water can be extracted from the tap, but also from the hot water tank while lowering the water level. In such a case, the chamber (12) must be placed under the water level of the water heater.
  • the device works as follows: If the nozzle valve (2) is opened, then cold water flows through the pipe section (3) into the mixing chamber (14) of the mixing valve (4) and from here either into the cold water inflow line (5) or into line (8) or but together with corresponding partial water quantities in the pipelines (5, 8). Water flowing into the cold water inflow line (5) presses hot water from the low pressure water reservoir (9) via the hot water pipe (6) to the overflow (7). The transition from the hot water pipe (6) to the overflow (7) is in the fitting according to FIG. 2 behind the pipe section (3). The water jet pump (10) sucks water out of the chamber (12) via the suction line (11) and the suction opening (13) and mixes it into the cold water flow accordingly.
  • the volume of the chamber (12) should be so large that approx. 3%, i.e. have about 150 cm3 of water in their place. If the water jet pump works well, it can add about 30% water from the chamber (12) to its own volume flow, so that a through-flowing volume of approximately 450 cm3 is necessary to completely empty the chamber (12). This is just under 1/2 l, which occurs practically with every tap. Of course, the device works just as well if less water is drawn, because it can also be assumed that correspondingly less water will be removed from the storage tank and thus less water will have to be reheated.
  • the mixing valve (4) is switched to direct passage to the low-pressure hot water tank (9), which corresponds to a "hot" temperature setting, the chamber (12) sucks water out of the tank via the cold water supply line (5) after the tap process has been completed 9) back, so that there is now a lowering of the water level inside the fitting or in the piping connected to the fitting, if not a lowering of the water level inside the reservoir itself. This depends on the size of the chamber (12) determined.
  • a water jet pump is always indicated as a vacuum-generating element.
  • a Venturi nozzle can also be used here, which is equivalent in its effect to the water jet pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Multiple-Way Valves (AREA)

Claims (3)

1. Dispositif pour l'empêcher de dégoutter, lors de la montée en température d'un chauffe-eau à écoulement libre(9) par l'utilisation d'une trompe d'aspiration à eau(10) située dans le circuit d'arrivée d'eau froide(5) du chauffe, celle-ci, lors de l'ouverture du robinet de puisage(2), provoque une aspiration, par la tubulure d'aspiration(13), de l'eau contenue dans la chambre(12) avec déformation de celle ci, en conséquence de quoi, lors de la fermeture de la robinet de puisage(2), l'eau reflue vers la chambre par intermédiaire de la tubulure d'aspiration(13) jusqu'a ce que la chambre reprenne sa forme initiale, en considérant que la tubulure d'aspiration(13) est isolée de l'environnement extérieur quand l'eau est aspiré de la chambre, et la chambre est isolée de l'environnement extérieure quand celle-ci est pleine d'eau, et ce qui le robinet de puisage(2) étant lié à un mitigeur(4) par l'intermédiaire d'une tubulure de liaison(3), caractérisé par le fait que la trompe d'aspiration à eau(10) est située dans la tubulure de liaison(3) entre le robinet de puisage(2) et le mitigeur(4).
2. Dispositif selon la revendication 1, caractérisé par le fait de la présence d'une trompe d'aspiration à eau(10) en tant que composant intrigée en totalité dans la tubulure de liaison(3) (Fig. 3).
3. Dispositif selon la revendication 1, caractérisé par le fait que le conduit(8) reliant le mitigeur(4) à la tubulure de trop-plein(7) contiens un clapet antiretour(16), et que le mitigeur(4) présent un disque ajouré de manière à ce que, sur position "eau froide" au sujet de la tubulure d'arrivée d'eau froide(5), une section de passage minimale soit maintenue afin d'assurer l'aspiration de l'eau du chauffe-eau(9).
EP89118532A 1988-10-29 1989-10-05 Dispositif équipant un chauffe-eau pour l'empêcher de dégoutter Expired - Lifetime EP0366971B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118532T ATE72893T1 (de) 1988-10-29 1989-10-05 Vorrichtung bei einem warmwasserbereiter zum vermeiden des tropfens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883836877 DE3836877C1 (en) 1987-07-21 1988-10-29 Device in a water heater for preventing dripping
DE3836877 1988-10-29

Publications (2)

Publication Number Publication Date
EP0366971A1 EP0366971A1 (fr) 1990-05-09
EP0366971B1 true EP0366971B1 (fr) 1992-02-26

Family

ID=6366146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118532A Expired - Lifetime EP0366971B1 (fr) 1988-10-29 1989-10-05 Dispositif équipant un chauffe-eau pour l'empêcher de dégoutter

Country Status (2)

Country Link
EP (1) EP0366971B1 (fr)
AT (1) ATE72893T1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399211B (de) * 1992-12-01 1995-04-25 Ideal Standard Verbrühschutz für wasserentnahmesysteme mit niederdruckspeicher
SE9502720L (sv) * 1995-07-28 1997-01-29 Electrolux Ab Anordning och förfarande för att förhindra dropp från en vattenrenares utloppspip
CN100419343C (zh) * 2004-11-16 2008-09-17 海尔集团公司 恒温热水器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB526504A (en) * 1939-03-18 1940-09-19 Ferranti Ltd Improvements in or relating to water heaters
DE1275749B (de) * 1961-04-25 1968-08-22 Siemens Elektrogeraete Gmbh Heisswasserbereiter

Also Published As

Publication number Publication date
ATE72893T1 (de) 1992-03-15
EP0366971A1 (fr) 1990-05-09

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