EP3018427B1 - Dispositif de protection et chauffe-eau - Google Patents

Dispositif de protection et chauffe-eau Download PDF

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Publication number
EP3018427B1
EP3018427B1 EP15192580.7A EP15192580A EP3018427B1 EP 3018427 B1 EP3018427 B1 EP 3018427B1 EP 15192580 A EP15192580 A EP 15192580A EP 3018427 B1 EP3018427 B1 EP 3018427B1
Authority
EP
European Patent Office
Prior art keywords
float
protective device
water
float chamber
lever
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.)
Active
Application number
EP15192580.7A
Other languages
German (de)
English (en)
Other versions
EP3018427A1 (fr
Inventor
Manuel Thies
Mathias Radl
Anton Arsenyev
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.)
Robert Bosch 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
Publication of EP3018427A1 publication Critical patent/EP3018427A1/fr
Application granted granted Critical
Publication of EP3018427B1 publication Critical patent/EP3018427B1/fr
Active 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
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/12—Preventing or detecting fluid leakage
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • 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
    • F24H9/16—Arrangements for water drainage 
    • F24H9/17—Means for retaining water leaked from heaters

Definitions

  • the invention relates to a protective device for a water heater, in particular for a domestic hot water device, for shutting off a cold water inlet at a leakage of a conduit system of the water heater, and a water heater, in particular for the domestic sector.
  • the object of the invention is to provide a protective device for a water heater, in particular for domestic use, which reliably, automatically and quickly shuts off the water supply in case of leakage of the water heater . Furthermore, it is an object of the invention to provide a water heater , whose water supply is reliably, automatically and quickly controlled in case of leakage in the water-bearing device section.
  • the protective device is an automatic, mechanical safety device that responds to the leaking from the water heater water and mechanically controls the water inlet in the event of leakage in the water heater.
  • the guard provides protection against water damage when the heater block bursts, for example due to frost or transportation damage, and does not require power suppliers to trip.
  • the protective device has a shut-off valve for automatically shutting off the water inlet, a float in a float chamber, which penetrates leakage water. floats, and a mechanism for releasing a closing element of the shut-off valve when floating the float.
  • the protective device thus has relatively few components, which makes it relatively trouble-free, low maintenance, easy to install and inexpensive. In particular, the components can be individually matched and replaced depending on the respective water heater.
  • a separation chamber for cleaning the leakage water of solids may be arranged upstream of the float chamber.
  • the float is biased by a spring element in its rest position. This prevents accidental lifting of the float as a result of, for example, bumps.
  • the guard may have a transport lock for fixing the float in its rest position.
  • the transport lock prevents accidental triggering of the shut-off valve, for example as a result of transport loads, installation work and the like.
  • the aim of this transport safety device is to make the safety device operational only after the start of operation of the water heater.
  • the transport lock responds to leakage water in the water heater and then switches the guard to the active state.
  • water from the water system of the water device is used.
  • water is used outside the water system of the warning water device, either water after the hot water outlet or before the cold water inlet, or water that passes through the leakage.
  • the float chamber has a closable outlet opening.
  • the closing element is biased into its closed position and the mechanism has a prestressed into its release position locking pin for holding the closing element in its open position and a lever, the at Floating the float releases the locking pin.
  • the mechanism acts as a transmission or reduction between a buoyancy force of the float and a restoring force of a locking pin spring, so that a response of the protection device and the closing element can be accurately adjusted.
  • a simple technical transfer of a float movement of the float can be done via a guided out of the float chamber locking bar, which acts on the lever and de takes the float when floating.
  • the bottom opening of the float chamber is encompassed by a riser at least partially encompassing the locking bar, which extends into the float chamber and is sealed off from it .
  • Air in the riser pipe must be taken into account when designing the float as the air affects the buoyancy force.
  • a sensitive response of the float or the mechanics can be achieved by reducing friction.
  • a contact surface of the lever for the locking bar relative to at least one viewed in the buoyancy direction adjacent lever surface be highlighted or an adjacent lever surface may be reset in the buoyancy against the attack surface.
  • a float chamber cover and / or a mechanical cover are preferably concealed latched with a device container forming the float chamber.
  • float chamber cover and / or the mechanical cover In order to be able to recognize at any time whether the float chamber cover and / or the mechanical cover have been removed, it is advantageous if they can not be removed without damage.
  • they consist of a brittle material such as PS, which breaks very quickly in the event of violence or shows cracks.
  • an end cap for closing a mounting opening for the closing element can have at least one latching arm for latching with a housing section receiving the closing element, and the lever cover has a screen for concealing the at least one latching arm. Through the aperture access to the at least one locking arm is covered, so that the end cap can not be removed without destroying.
  • a hot water device in particular for domestic use, has a line system with a cold water inlet for supplying cold water, a hot water outlet for taking hot water, and with a heating block fluidly arranged between the cold water inlet and the hot water outlet for heating the cold water.
  • the water heater has a protective device for shutting off the cold water inlet in the event of a leakage of the line system, wherein the protective device is de-energized and leakage water initiates or initiates a closing operation for the automatic shut-off of the cold water inlet.
  • the hot water device according to the invention is due to the protection reliable in unguarded and off state or idle state automatically protected against water leakage from a damaged water-bearing device section, regardless of whether the device is energized or not.
  • the maximum amount that can escape is the water that was in the damaged device section at the time the protective device was triggered.
  • the invention is particularly suitable in connection with a water heater or a hot water tank in the home, in the unguarded and off state or state of rest of the water heater effectively and automatically a possible water leakage from the water-bearing device section is to be prevented, regardless of whether the device is energized or not.
  • the protective device can also be retrofitted in existing water heaters, protected against manipulation, enables a 100% inspection in production and has an easy-to-install design.
  • FIG. 1 shows a perspective view of a protective device 1 according to the invention for a water heater, in particular for a domestic hot water device, for shutting off a water inlet of the water heater in case of leakage in a water-conducting device section or in the pipe system.
  • the water heater is for example a water heater or a hot water tank.
  • the protective device 1 has a shut-off valve 2 for shutting off the water inlet and a hollow watertight container 4 which is closed by a cover 6 and provided on the bottom side with a cover 8 for covering a mechanism 10 which will be explained below.
  • the shut-off valve 2 has a preferably plastic-based tubular valve housing 12, in which in the axial direction a closing element 14, which will be explained below, is displaceably guided.
  • the shut-off valve 2 can be integrated into the water inlet via two orthogonally oriented pipe sections 16, 18 of the valve housing. While the axial pipe section 16 is connectable by means of a clamp 20 to a water inlet section downstream of the closure element 14, a metallic union nut 22 is provided on the transversely extending pipe section 18 for connection to an upstream water inlet section.
  • the union nut 22 has a radially inner annular shoulder 24, by means of which it is rotatably disposed between a radial collar 26 of a screw-28.
  • the screw-in 28 is a plastic part and screwed with a threaded portion 30 in the transversely extending pipe section 18.
  • a ring seal 32 is inserted in the area of the threaded engagement.
  • a preferably metallic washer 34 is arranged, by means of which excessive squeezing of the radial collar 26 when tightening the union nut 22 is prevented.
  • the closing element 14 between an open position ( FIG. 3 ) and a closed position ( FIG. 4 ) axially displaceable in the valve housing 12. It is in particular a closing piston 14 which is biased by a valve spring 36 in its closed position.
  • the valve spring 36 is supported on an end cap 38 and engages an inner surface 40 of the closing piston 14.
  • the end cap 38 sealingly closes an axial opening 42 of the valve housing 12, through which the closing piston 14 and the valve spring 36 are inserted into the valve housing 12.
  • In the closed position of the closing piston 14 is sealingly against a housing-side valve seat 44 and thus blocks a passage between the two pipe sections 16, 18 from.
  • the closing piston 14 In its open position, the closing piston 14 is secured by a locking pin 46, which is guided by a radial opening 48 of the valve housing 12 and forms a stop for a body portion 52 of the closing piston 14.
  • a locking pin 46 When the locking pin 46 is withdrawn and thus transferred into its release position, the closing piston 14 is released and is transferred by means of the valve spring 36 in its closed position.
  • the locking pin 46 forms part of the mechanism 10, which is activated via a floating float 54.
  • the float 54 is a cube-like plastic body which is arranged in a float chamber 56 formed by or in the container 4. He is play-absorbed in the float chamber 56 and is absorbed by the flow of leakage water 58 from its rest position into its in FIG. 5 transferred floating position shown. In its rest position it lies on the bottom side in the Float chamber 56 and is spaced from the lid 6. In its floating position, the leakage water 58 generates a buoyancy force that lifts it from its rest position until it abuts against the lid 6.
  • the float chamber 56 has a cover-side inlet 60, for introducing the leakage water 58.
  • the inlet 60 is arranged centrally here the float chamber 56 and forms a pipe socket on which, for example, a leaking water-carrying hose can be plugged.
  • the float chamber 56 has a drain 62, which has been closed after successful acceptance test or 100% test in which water is passed into the float chamber 56 in order to check the function of the float 54.
  • the float 54 is penetrated vertically by a centrally arranged here locking bar 64 of the mechanism 10.
  • the latch bar 64 occurs in the latch gear, i. in the non-floating state of the float 54, with its foot portion 66 through a bottom opening 68 of the float chamber 56 therethrough and has a here handle-like head portion 70, by means of the floating of the float 54, a positive connection between the float 54 and the locking rod 64 is formed, which is a lifting allows the locking bar 64 when floating.
  • the bottom opening 68 is surrounded by a riser 72 that extends into the float chamber 56 to the float 54, as in FIG. 6 figured, and a tube interior 74 for the locking bar 64 forms.
  • the riser 72 has an outside diameter smaller than an inside diameter of the riser 72 receiving tubular cavity 76.
  • the riser 72 is lapped by the leakage water 58.
  • the locking bar 64 has an in FIG. 6 numbered sealing collar 78, by means of which a passage extending axially from the cavity for the locking rod 64 is sealed by the float body 54.
  • the mechanism 10 of the protective device 1 includes, in addition to the floatable with the float 54 locking rod 64 and the locking pin 46, a bolt spring 80 for biasing the locking pin 46 in its release position and a pivotable lever 82, which establishes an operative connection between the locking bar 64 and the locking pin 46.
  • the bolt spring 80 is a compression spring. It is supported on a container portion 84, engages around the locking pin 46 and engages an annular shoulder 86 of the locking bolt 46, whereby it is biased against the lever 82.
  • the lever 82 is pivotable about a pivot axis 88.
  • the pivot axis 88 is near an engagement surface 90 (see FIG. 9 ) of the locking pin 46 and extends in the installed position of the protective device 1 in the vertical direction and thus transversely to this.
  • the bottom opening 68 and thus the locking bar 64 is positioned.
  • the locking bar 64 with its foot portion 66 passes out of the bottom opening 68, it lies as in FIG. 7 shown with its foot portion 66 laterally on the lever 82 and secures it in its Verrieglungs ein.
  • the latch bar 64 is raised, the lever 82 is released and, as in FIG FIG. 8 shown pivotable about a pivot angle.
  • the bolt spring 80 relaxes and pulls the locking pin 46 out of engagement with the closing piston 14, whereupon the closing piston 14 is transferred via the valve spring 36 from its open position to its closed position and the water supply is shut off.
  • the pivoting angle of the lever 82 is limited by a pin 92 extending from a bottom wall 94 of the container 4.
  • the locking rod 64 is disposed behind the locking pin 46 from the perspective of the pivot axis 88.
  • the pivot axis 88 is flattened toward the locking pin 46 to the pivot angle.
  • a lever-side contact surface 96 for the locking bar 64 is web-like or viewed in the vertical direction or buoyancy direction adjacent lever surfaces 98 are downgraded relative to the contact surface 96, so that the contact surface 96 protrudes.
  • FIG. 11 Locking the lid 6 and the cover or mechanical cover 8 are shown with the container 4.
  • the lid 6 and the cover 8 each have a circumferential border 100, 102, on the inside locking projections 104, 106 are formed, which cooperate with outer container projections 108, 110.
  • the container 4 also has two circumferential webs 112, 114, which lie in the assembled state of the lid 4 and the cover 8 in the region of their border edges 116, 118 and dive behind them.
  • the cover 6 and the cover 8 per se are preferably made of such a brittle material that a respective damage-free removal is not possible.
  • An exemplary material is polystyrene or PS.
  • the float 54 here feet 119, 121, by means of which it is spaced in its basic position of the bottom wall 94 of the float chamber 56.
  • the feet 119, 121 are for example individual feet, single bars or circumferential bars.
  • FIG. 12 is in relation to FIG. 2 a locking of the end cap 38 with the valve housing 12 for closing the axial opening 42 is shown.
  • the end cap 38 protrudes into the axial opening 42 with a cylinder section 120 and surrounds the valve housing 12 on the outer peripheral side.
  • a sealing ring 122 is inserted between the cylinder section 120 and the valve housing 12.
  • the outer peripheral side latching is designed as a bayonet closure or a plurality of bayonet locks.
  • the end cap 38 has a plurality of resilient latching arms 124, which latched in the assembled state with valve housing-side locking lugs 126.
  • the latching arms 124 are uniformly distributed over the circumference and locked with the locking lugs 126, for example, after a 90 ° rotation.
  • the cover 8 has a diaphragm 128, which corresponds to a Arc section of the end cap 36 and the locking arm 124 is formed and a locking arm 124 hidden.
  • the panel 128 is guided so close to the end cap 38, that the concealed latching arm 124 can not be performed on the associated latching lug 124.
  • FIG. 13 an interior view of the mechanical cover 8 is shown.
  • the cover 8 has an abutment 130 for the locking pin 46 and an abutment 132 for the pivot axis 88 of the lever 82.
  • the abutment 130 for the pivot axis 88 is formed as an annular bead, which is formed according to a cross section of the flattened pivot axis 88.
  • the abutment 132 for the locking pin essentially consists in an upright wall 134, in which a trough 136 for receiving a free end of the locking pin 46 is introduced.
  • a hot water device such as a water heater or a hot water tank
  • its water-conducting pipe system is undamaged.
  • the float chamber 56 is free of leakage water 58 and the float 54 is in its rest position, in which it rests on the bottom of the float chamber 56.
  • a compression spring not shown, which is arranged between the cover 6 and the float 54, the float 54 can be made insensitive to shocks and the like, so that an accidental release is prevented.
  • the locking rod 64 is maximally extended and the lever 82 is in its locking position in which the locking pin 46 is fixed in its blocking position.
  • the locking pin 46 abuts against the body portion of the closing piston 14 and holds it in its open position. A cold water inlet of the water heater is turned on.
  • a leakage has formed in the line system.
  • the leakage water 58 is led to the inlet 60 of the float chamber 56 and enters into it.
  • the leakage water 58 collects in the float chamber 56 and generates above a certain amount a buoyancy force acting on the float 54.
  • Float 54 floats and lever 82 is unlocked and thus pivotable.
  • the locking pin 46 is now transferred by means of the bolt spring 80 in its release position.
  • the positive connection between the locking pin 46 and with closing piston 14 is canceled.
  • the closing piston 14 is transferred via the valve spring 36 in its closed position, in which it bears sealingly against the valve seat 44 and the cold water inlet is shut off.
  • the water heater is thus disconnected from the house water network and cold water can no longer flow into the damaged line section.
  • the line section now runs empty above the damaged wall section, wherein the leaking leakage water 58 is completely absorbed in a drip pan, not shown.
  • a protective device for a water heater in particular for a domestic hot water device, for shutting off a water inlet at a leakage of a line system of the water heater, the protective device is de-energized, characterized in that leakage water initiates a closing operation for automatically shutting off the water inlet, and a water heater.

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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)
  • Fluid Mechanics (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Check Valves (AREA)

Claims (13)

  1. Dispositif de protection (1) pour un chauffe-eau, en particulier pour un chauffe-eau d'usage domestique, pour bloquer une alimentation en eau en cas de fuite d'un système de conduite du chauffe-eau, le dispositif de protection (1) n'étant pas alimenté en courant et l'eau de fuite amorçant une opération de fermeture pour un blocage automatique de l'alimentation en eau,
    le dispositif de protection (1) présentant une soupape d'arrêt (2) et un flotteur (54) dans une chambre de flotteur (56), qui flotte lors de la pénétration d'eau de fuite, et un mécanisme (10) pour libérer un élément de fermeture (14) de la soupape d'arrêt (2) lorsque le flotteur (54) flotte,
    l'élément de fermeture (14) étant précontraint dans sa position de fermeture,
    caractérisé en ce que le mécanisme comprend un boulon de blocage (46) précontraint dans sa position de libération pour retenir l'élément de fermeture (14) dans sa position d'ouverture, et un levier (82) qui libère le boulon de blocage (46) lorsque le flotteur (54) flotte.
  2. Dispositif de protection selon la revendication 1, dans lequel une quantité d'eau de fuite peut être ajustée pour l'amorçage.
  3. Dispositif de protection selon la revendication 1 ou 2, dans lequel le flotteur (54) est précontraint par le biais d'un élément de ressort dans sa position de repos.
  4. Dispositif de protection selon l'une quelconque des revendications précédentes, dans lequel il est prévu une fixation de transport pour fixer le flotteur (54) dans sa position de repos.
  5. Dispositif de protection selon l'une quelconque des revendications précédentes, dans lequel la chambre de flotteur (56) présente un écoulement (62) pouvant être fermé.
  6. Dispositif de protection selon l'une quelconque des revendications précédentes, dans lequel le flotteur (54) agit, par le biais d'une tige de verrouillage (64) guidée hors de la chambre de flotteur (56), sur le levier (82) qui entraîne le flotteur (54) lorsqu'il flotte.
  7. Dispositif de protection selon la revendication 6, dans lequel la tige de verrouillage est guidée à travers une ouverture de la chambre de flotteur (56), depuis laquelle un tube montant (72) s'engageant au moins en partie autour de la tige de verrouillage (48) s'étend dans la chambre de flotteur (56), lequel est étanchéifié par rapport à la chambre de flotteur (56).
  8. Dispositif de protection selon l'une quelconque des revendications précédentes, dans lequel le levier (82) peut pivoter autour d'un axe de pivotement (88) qui est aplati autour de son angle de pivotement.
  9. Dispositif de protection selon la revendication 6, 7 ou 8, dans lequel une surface de contact (64) du levier (82) pour la tige de verrouillage (48) est en relief par rapport à au moins une surface de levier (98) adjacente dans la direction de flottaison.
  10. Dispositif de protection selon l'une quelconque des revendications précédentes, dans lequel un couvercle de chambre de flotteur (6) et/ou un recouvrement de mécanisme (8) sont encliquetés de manière dissimulée avec un récipient de dispositif formant la chambre de flotteur (56).
  11. Dispositif de protection selon l'une quelconque des revendications précédentes, dans lequel le couvercle de chambre de flotteur (6) et/ou le recouvrement de mécanisme (8) ne peuvent pas être enlevés sans endommagement.
  12. Dispositif de protection selon la revendication 10 ou 11, dans lequel un capuchon d'extrémité (38) pour fermer une ouverture axiale (42) pour l'élément de fermeture (14) présente au moins un bras d'encliquetage (124) pour l'encliquetage avec une portion de boîtier recevant l'élément de fermeture (14), et le recouvrement de mécanisme (8) présente un bandeau pour dissimuler l'au moins un bras d'encliquetage (124).
  13. Chauffe-eau, en particulier pour usage domestique, comprenant un dispositif de protection (1) selon l'une quelconque des revendications précédentes.
EP15192580.7A 2014-11-06 2015-11-02 Dispositif de protection et chauffe-eau Active EP3018427B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014222731.3A DE102014222731B4 (de) 2014-11-06 2014-11-06 Schutzeinrichtung und Warmwassergerät

Publications (2)

Publication Number Publication Date
EP3018427A1 EP3018427A1 (fr) 2016-05-11
EP3018427B1 true EP3018427B1 (fr) 2018-05-02

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Application Number Title Priority Date Filing Date
EP15192580.7A Active EP3018427B1 (fr) 2014-11-06 2015-11-02 Dispositif de protection et chauffe-eau

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EP (1) EP3018427B1 (fr)
DE (1) DE102014222731B4 (fr)
PT (1) PT3018427T (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3859228B1 (fr) 2020-01-31 2024-03-06 Gerdes Holding GmbH & Co. KG Chauffe-eau instantané pour chauffer l'eau

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EP3018427A1 (fr) 2016-05-11
DE102014222731B4 (de) 2020-10-08
DE102014222731A1 (de) 2016-05-12
PT3018427T (pt) 2018-07-11

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