EP2598809B1 - Dispositif de protection, chauffe-eau instantané et réservoir de fluide - Google Patents

Dispositif de protection, chauffe-eau instantané et réservoir de fluide Download PDF

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Publication number
EP2598809B1
EP2598809B1 EP11730973.2A EP11730973A EP2598809B1 EP 2598809 B1 EP2598809 B1 EP 2598809B1 EP 11730973 A EP11730973 A EP 11730973A EP 2598809 B1 EP2598809 B1 EP 2598809B1
Authority
EP
European Patent Office
Prior art keywords
fluid
protective device
valve
bypass line
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.)
Not-in-force
Application number
EP11730973.2A
Other languages
German (de)
English (en)
Other versions
EP2598809A2 (fr
Inventor
Christian Englisch
Michael Gruber
Wolfgang Hörner
Alfred Stanzel
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11730973T priority Critical patent/PL2598809T3/pl
Publication of EP2598809A2 publication Critical patent/EP2598809A2/fr
Application granted granted Critical
Publication of EP2598809B1 publication Critical patent/EP2598809B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters

Definitions

  • the present invention relates to a protective device for a fluid-carrying device for protection against fluid leakage in the event of damage to a fluid-carrying device section, a water heater with such a protective device and a fluid reservoir, with such a protective device.
  • a known protective device is integrated, for example, in an electric instantaneous water heater in the DE 41 03 373 A1 shown.
  • the water heater is designed in bare wire technology and has a heating block in which a meandering heating channel is formed, which communicates with a cold water inlet and a hot water drain.
  • a plurality of electrical heating coils is installed in the heating channel, which are energized upon actuation of an electrical switch of the water heater and thereby emit the resulting heat to the water flowing around them.
  • a protective device which disconnects the heating coils or the continuous-flow heater from the power supply on all poles. This prevents the heater from causing a user-unrecognized short circuit, which can lead to corrosion and, after some time, to leaks in the heating block.
  • a disadvantage of this protective device is that it prevents water leakage only in so far as that corrosion is prevented. A water outlet from a burst but electrically functional heating block is not prevented.
  • shut-off valve system which regulates a fluid supply line to a fluid reservoir.
  • the shut-off valve system is controlled by a differential pressure between the fluid reservoir and the fluid supply line.
  • a lower pressure in the fluid reservoir than in the fluid supply leads to the closing of the Shut-off valve system.
  • a temperature difference between the fluid reservoir and the supply line can lead to a pressure difference, which thus erroneously blocks the supply line.
  • the object of the present invention is to provide a protective device for a fluid-conducting device which eliminates the aforementioned disadvantages and effectively prevents fluid leakage in the event of damage or bursting of a fluid-conducting device section, a flow heater with such a protective device and a fluid reservoir with such a device To provide protection device.
  • the solution according to the invention prevents, especially in the unguarded and switched off or idle state of the device effectively and automatically a fluid outlet from the fluid-conducting device section to which the bypass line extends parallel, regardless of whether the device is energized or not. It can maximally escape the fluid that was in the damaged device section at the time of bursting. However, this amount is relatively low and thus leads to no significant fluid damage. In the case of a liquid fluid such as water, a water damage is thus prevented. In the case of a gaseous fluid thus the danger of poisoning, explosion, deflagration and drgl. Depending on the gas is prevented. In addition, the protection device has relatively few components, making it relatively susceptible to interference, low maintenance, easy to install and inexpensive.
  • the bypass line has a smaller passage area than the fluid inlet and the fluid outlet. This prevents that an excessive amount of the fluid is guided past the fluid-carrying device section in the fluid drain, which would, for example, adversely affect the heating performance of a water heater.
  • a switching unit for generating a switching signal for opening the shut-off valve is arranged in the bypass line.
  • the arrangement of the switching unit in the cross-section tapered bypass line prevents occurring in the fluid inlet pressure fluctuations are detected by the switching unit and reported to the shut-off valve, which would then change its respective working position, so that the protection device is relatively robust.
  • the switching signal is reported directly to the shut-off valve, whereby this embodiment is particularly simple and inexpensive to produce.
  • the switching signal is processed via at least one installed electronics and then reported to the shut-off valve.
  • the electronics can amplify the switching signal and thus increase the sensitivity of the protective device or, for example, act as a filter that detects faulty switching signals and does not forward them to the shut-off valve.
  • two electronics may be provided, wherein the switching unit passes the switching signal to a first electronics and this then forwards the switching signal to an electronics for switching the shut-off valve.
  • a pressure signaling line for forwarding one in the bypass line occurring pressure drop to the shut-off valve.
  • the pressure signaling line has a correspondingly small flow cross section and eliminates the use of the aforementioned switching unit.
  • a preferred shut-off valve is a solenoid valve. Solenoid valves are not susceptible to interference, correspondingly low maintenance and compact.
  • the check valve arranged in the fluid outlet is preferably a directional valve, in particular a non-return valve spring-biased in the direction of the heating block into its closed position.
  • the check valve does not require a separate switching signal to the opening and is also maintenance-free. It is only interpreted the spring in terms of acting on its valve body opening pressure, which is generated by the effluent from the fluid-carrying device portion fluid.
  • a preferred instantaneous water heater is equipped with the protective device according to the invention.
  • the shut-off valve is preferably arranged in the cold water inlet and the check valve in the hot water drain.
  • the bypass line then extends parallel to the heating block, so that when the bursting of the heating block only the water that was in it was able to escape, since over the shut-off valve and the check valve, a subsequent flow of fresh water is prevented in the heating block.
  • a preferred fluid reservoir is a hot water tank, wherein the shut-off valve is preferably in the cold water inlet and the check valve in the hot water drain.
  • the bypass line then extends parallel to the storage container, so that when the storage container bursts only the water can escape that was in it, as via the shut-off valve and the check valve, a subsequent flow of fresh water is prevented in the storage container.
  • the present invention is particularly suitable for the provision of a water heater or a domestic hot water storage in the unguarded and off state or rest state effectively and automatically prevents fluid leakage from the heating block or storage tank, regardless of whether the water heater or the Hot water tank is energized or not.
  • FIG. 1 shows a schematic structure of a flow heater according to the invention.
  • FIG. 1 shows a structure of a water heater 1 according to the invention for heating water, which is pressure-resistant and preferably carried out in bare-wire technology. It has a heating block 2 in which a meandering heating channel, not shown, is formed with a plurality of heating coils for heating the water.
  • the water to be heated is supplied to the heating block 2 via a cold water inlet 4.
  • the heated water is taken from the heating block 2 via a hot water drain 6, in which a hot water fitting 8 is arranged at a portion remote from the heating block 2, which is opened by an operator to remove the warm water.
  • the instantaneous water heater 1 has a protective device 10, by means of which it is prevented that water escapes from the heating block 2 in the event of damage, particularly in the unguarded and switched-off state.
  • the protection device 10 has a cold water side check valve 12, a hot water side check valve 14, a bypass line 16, and a bypass line side switching unit 18.
  • the shut-off valve 12 is arranged in the cold water inlet 4 and preferably a solenoid valve, which is transferred via an actuating unit 20 from its basic position to a working position. In its basic position, which corresponds to its closed position, the solenoid valve 12 is closed and thus the cold water inlet 4 is controlled. In its working position, the shut-off valve 12 is opened and thus the cold water inlet 4 is turned on, so that water to be heated can flow into the heating block 2.
  • the check valve 14 is arranged in the hot water drain 6 and preferably a directional valve, in particular an automatic check valve. It has a valve body 22 which is biased by a spring 24 against a valve seat 26 to a home position.
  • the check valve 14 is oriented in the cold water inlet, that in its basic position, which corresponds to a closed position, the hot water drain 6 is blocked in the direction of the heating block 2. Opened and thus transferred to its working position, the check valve 14 is generated via the voltage applied to the valve body 22 and generated by the effluent from the heating block 2 warm water opening pressure.
  • the bypass line 16 establishes a fluid connection between the cold water inlet 4 and the hot water outlet 6 parallel to the heating block 2. It engages upstream of the solenoid valve 12 and downstream of the check valve 14 to the cold water inlet 4 and the hot water drain 6 and has a flow cross-section which is substantially smaller than the cold water inlet 4 and the hot water drain 6.
  • the switching unit 18 is associated with the bypass line 12 and has a switch 28 and an unnumbered valve, which is arranged in the bypass line 12 via a spring 30 biased into its rest position valve body 32.
  • the position of the valve body 32 is reported via a control line 34 from the valve to the switch 28, which generates a switching or opening signal and this passes on a signal line 36 to the actuator unit 20 for opening the solenoid valve 12.
  • the hot water fitting 8 When the flow heater is switched on, the hot water fitting 8 is opened by the operator.
  • the water in the bypass line 16 flows through the hot water fitting 8 and via the cold water inlet 4 fresh water flows into the bypass line 16. Consequently, a flow is formed in the bypass line 16, which causes the valve body 32 of the switching unit 18 is transferred against its spring bias from a rest position to its switching position.
  • the switching position is over the control line 34 is signaled to the switch 28, which sends a corresponding switching signal to the actuating unit 20 via the signal line 36, whereupon the solenoid valve 12 is transferred to its open position and the cold water inlet 4 is opened in the direction of the heating block 2.
  • the fresh or to be heated water flows through the open solenoid valve 12 in the heating block 2, is heated there and exits through the hot water drain 6 from the heating block 2. It flows against the located in its closed position valve body 22 of the check valve 14 and acts on it with such pressure that it opens against its spring bias and thus the warm water flows through the check valve 14 through the heating water drain 6 in the direction of the hot water fitting 8 and there Flow heater 1 can be removed.
  • the flow heater 1 occurs depending on the installation position located in this device area 2, 38, 40 downstream of the check valve 12 and upstream of the check valve 14 located water from the water heater 1 from.
  • this amount of water is very low, so that there is no major water damage.
  • a protective device for a fluid-carrying device for protection against fluid leakage in case of damage to a fluid-conducting device section, with a shut-off valve for placement in the fluid inlet of the device, which is in a basic position in the closed position, a bypass line for establishing a fluid connection upstream of the shut-off valve from the fluid inlet to Fluid flow of the device parallel to the fluid-conducting device section, and with a check valve upstream of the bypass line in the fluid drain and prevents leakage of the fluid from the bypass line in the direction of the damaged device section via the fluid drain, a water heater and a fluid reservoir, each having such a protection device.

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  • 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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Multiple-Way Valves (AREA)

Claims (11)

  1. Dispositif de protection (10) pour un appareil conducteur de fluide (1), destiné à la protection contre une fuite de fluide en cas de détérioration d'une section (2, 38, 40) de l'appareil conducteur de fluide,
    le dispositif de protection (10) présentant une vanne d'arrêt (12) à disposer dans l'entrée de fluide (4) de l'appareil (1), laquelle vanne d'arrêt, dans une position de base, se trouve en position de fermeture, et une conduite (16),
    et le dispositif de protection (10), au moyen d'une soupape de blocage (14) à disposer en amont de la conduite (16) dans la sortie de fluide (6) empêchant un écoulement du fluide hors de la conduite (16) en direction de la section (2, 38, 40) endommagée de l'appareil par la sortie du fluide (6),
    caractérisé en ce que la conduite (16) est une conduite de by-pass (16) destinée à établir une liaison de fluide en amont de la vanne d'arrêt (12), de l'entrée du fluide (4) vers la sortie du fluide (6) de l'appareil conducteur de fluide (1), parallèlement à la section (2, 38, 40) de l'appareil.
  2. Dispositif de protection selon la revendication 1, la conduite de by-pass (16) ayant une section de passage plus petite que l'entrée de fluide (4) et la sortie de fluide (6).
  3. Dispositif de protection selon la revendication 1 ou 2, une unité de commutation (18) destinée à générer un signal de commutation pour ouvrir la vanne d'arrêt (12) étant disposée dans la conduite de by-pass (16).
  4. Dispositif de protection selon la revendication 3, le signal de commutation pouvant être directement signalé à la vanne d'arrêt (12).
  5. Dispositif de protection selon la revendication 3 ou 4, au moins une électronique destinée à la signalisation indirecte du signal de commutation à la vanne d'arrêt (12) étant ménagée.
  6. Dispositif de protection selon la revendication 1 ou 2, une conduite de signalisation de pression (36) destinée à transmettre à la vanne d'arrêt (12) une baisse de pression dans la conduite de by-pass (16) s'étendant de la conduite de by-pass (16) vers la vanne d'arrêt (12).
  7. Dispositif de protection selon l'une quelconque des revendications précédentes, la vanne d'arrêt (12) étant une électrovalve.
  8. Dispositif de protection selon l'une quelconque des revendications précédentes, la soupape de blocage (14) étant une soupape directionnelle qui est bloquée en direction de la section d'appareil (2, 38, 40) conductrice de fluide.
  9. Dispositif de protection selon la revendication 8, la soupape de blocage (14) étant un clapet anti-retour précontraint par ressort.
  10. Chauffe-eau instantané (1) comprenant un dispositif de protection (10) selon l'une quelconque des revendications précédentes.
  11. Réservoir de fluide comprenant un dispositif de protection (10) selon l'une quelconque des revendications 1 à 9.
EP11730973.2A 2010-07-28 2011-07-12 Dispositif de protection, chauffe-eau instantané et réservoir de fluide Not-in-force EP2598809B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11730973T PL2598809T3 (pl) 2010-07-28 2011-07-12 Urządzenie zabezpieczające, ogrzewacz przepływowy i zasobnik płynu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010038580A DE102010038580B3 (de) 2010-07-28 2010-07-28 Schutzeinrichtung, Durchlauferhitzer und Fluidspeicher
PCT/EP2011/061808 WO2012013482A2 (fr) 2010-07-28 2011-07-12 Dispositif de protection, chauffe-eau instantané et réservoir de fluide

Publications (2)

Publication Number Publication Date
EP2598809A2 EP2598809A2 (fr) 2013-06-05
EP2598809B1 true EP2598809B1 (fr) 2015-10-07

Family

ID=44628306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11730973.2A Not-in-force EP2598809B1 (fr) 2010-07-28 2011-07-12 Dispositif de protection, chauffe-eau instantané et réservoir de fluide

Country Status (5)

Country Link
EP (1) EP2598809B1 (fr)
DE (1) DE102010038580B3 (fr)
ES (1) ES2550314T3 (fr)
PL (1) PL2598809T3 (fr)
WO (1) WO2012013482A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528196B (zh) * 2013-10-24 2016-05-18 陈非 一种电热水器的防触电保护结构
DE102014222731B4 (de) 2014-11-06 2020-10-08 Robert Bosch Gmbh Schutzeinrichtung und Warmwassergerät
DE102014222732B4 (de) 2014-11-06 2021-06-10 Robert Bosch Gmbh Warmwassergerät und Schutzeinrichtung
CN112648746A (zh) * 2021-01-15 2021-04-13 广东万家乐燃气具有限公司 一种智能防护自动整机不工作电热水器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103373C2 (de) * 1991-02-05 1994-06-16 Stiebel Eltron Gmbh & Co Kg Durchlauferhitzer
US6021808A (en) * 1998-01-21 2000-02-08 Dulac; Lawrence M. Fluid supply shut off valve system and fluid monitoring device for use with same

Also Published As

Publication number Publication date
DE102010038580B3 (de) 2012-02-02
WO2012013482A3 (fr) 2012-07-26
WO2012013482A2 (fr) 2012-02-02
PL2598809T3 (pl) 2016-03-31
ES2550314T3 (es) 2015-11-06
EP2598809A2 (fr) 2013-06-05

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