DE10307134A1 - Arrangement for influencing mass flow meter of an instantaneous water heater ensures that a float in a float chamber responds quickly and reliably to presence of air in water supply - Google Patents

Arrangement for influencing mass flow meter of an instantaneous water heater ensures that a float in a float chamber responds quickly and reliably to presence of air in water supply

Info

Publication number
DE10307134A1
DE10307134A1 DE2003107134 DE10307134A DE10307134A1 DE 10307134 A1 DE10307134 A1 DE 10307134A1 DE 2003107134 DE2003107134 DE 2003107134 DE 10307134 A DE10307134 A DE 10307134A DE 10307134 A1 DE10307134 A1 DE 10307134A1
Authority
DE
Germany
Prior art keywords
float
characterized
device according
float chamber
bypass
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.)
Granted
Application number
DE2003107134
Other languages
German (de)
Other versions
DE10307134B4 (en
Inventor
Ernst Appun
Werner Holz
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
Application filed by STIEBEL ELTRON GmbH and Co KG filed Critical STIEBEL ELTRON GmbH and Co KG
Priority to DE10307134.2A priority Critical patent/DE10307134B4/en
Publication of DE10307134A1 publication Critical patent/DE10307134A1/en
Application granted granted Critical
Publication of DE10307134B4 publication Critical patent/DE10307134B4/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005Valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices or methods
    • F24H9/2007Arrangement or mounting of control or safety devices or methods for water heaters
    • F24H9/2014Arrangement or mounting of control or safety devices or methods for water heaters for heaters using electrical energy supply
    • F24H9/2028Continuous-flow heaters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects
    • G01F1/34Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/10Preventing damage by freezing or excess pressure or insufficient pressure

Abstract

A device for influencing a flow switching the radiators of a continuous-flow heater has a bypass 9 with a float chamber 5 for the main water flow. A float 7 floats up in water in the float chamber 5 and sinks in the air. The device prevents the radiators from burning in air. An inlet opening 4 and an outlet opening 6 for the main water flow are provided at the bottom of the float chamber 5. The float 7 blocks the outlet opening 6 in the lowered position. The cross section of the inlet opening 5 is larger than the cross section of the outlet opening 6.

Description

  • The invention relates to a device for influencing a flow meter of a water heater, a bypass to the main water flow with a float chamber is provided and a swimmer swims up in the swimmer chamber with water and in air, and in the lowered position, a bypass flow flows.
  • Such a device is intended to prevent in the case of air bubbles in the main water flow, the radiators, in particular bright wire radiators, of the instantaneous water heater run away. The flow meter, especially differential pressure switch, defines a switch-on threshold. At a certain water flow rate he turns on the radiators and below. The particular water flow rate depends on the particular one Switch on a nozzle connected to the instantaneous water heater.
  • A device of the type mentioned is in the DE 1 404 222 A1 described. The bypass is parallel to a Venturi nozzle of the differential pressure switch. The float is not in the main water flow and cannot interrupt it in any position. When the float swims up, it closes the bypass. If air bubbles enter the float chamber, the float sinks and a bypass flow prevents the differential pressure switch from being switched on. This facility is sluggish. Air bubbles can get past the bypass to the heaters of the instantaneous water heater.
  • In the DE-PS 1 166 953 and the DE 34 43 543 A1 such protective devices are also described. However, these work without a float. A closure member located in the main water flow should rise and interrupt the water flow when air bubbles occur in the main water flow.
  • The object of the invention is a Setup of the type mentioned with safe function and easy to create.
  • This task is due to the characteristics of claim 1 solved.
  • In normal operation, if not unusual If there are air bubbles in the main water flow, the float has floated up.
  • The outlet opening of the float chamber is free and the flow meter switches the radiators on when the switch-on threshold is exceeded. The additional one certain bypass flow prevents the float from falling through the dynamics of the Main water flow unintentionally sucked in front of the outlet opening becomes. The cross section of the outlet opening is larger than the cross section of the bypass. Because the cross section of the outlet opening is smaller is than the cross section of the inlet opening, it is ensured that even with the outlet opening open Bypass current flows. This bypass flow gives the float an additional buoyancy component that a suction of the float by the main water flow in front of the outlet counteracts.
  • Get to the main water flow Air into the float chamber, then the float sinks in front of the outlet opening and includes this off. The bypass flow existing in this case also ensures that the float is pressed sealingly against the outlet opening. In this closed position the float becomes practically net pressure at the moment of closing applied. This condition exists as long as the nozzle is open. First If the nozzle is closed, the float can be in the water swim up again. The bypass flow is - even when fully open Nozzle - below the switch-on threshold of the flow meter, so that the radiator off. The air entering the float chamber is over the Bypass discharged, so that the swimmer can then swim up again in the water.
  • So overall is a safe one Guaranteed functionality, where the flow meter, when there are air bubbles in the main water flow radiator switches off sufficiently quickly and again after the air has escaped goes into normal operation. The structure is easy to implement. The facility can be a be a separate component or in a heating block carrying the radiator or be integrated into the flow meter.
  • Further advantageous configurations result from the following description of exemplary embodiments and the dependent claims. The drawing shows:
  • 1 a device for influencing an electrical instantaneous water heater schematically and
  • 2 the device is integrated in a heating block of the instantaneous water heater.
  • In a basic body 1 are a water inlet channel 2 and a water outlet channel 3 axially horizontal approximately aligned. The inlet channel 2 opens at an inlet opening 4 down into a float chamber 5 , The outlet channel 3 opens at an outlet opening 6 down in the float chamber 5 , The diameter D of the inlet opening 4 is larger than the diameter d of the outlet opening 6 to in the float chamber 5 to be able to create a differential pressure.
  • In the float chamber 5 is a preferably drum-shaped float 7 disposed that with air in the float chamber 5 below in front of the outlet opening 6 lies. This position is shown in dashed lines. The shape of the outlet opening 6 and the shape of the float 7 are so matched that the swimmer 7 the outlet opening 6 can be watertight.
  • With water in the float chamber 5 is the swimmer 7 floated up to its upper position by a stop 8th is so limited that even in the floated position of the swimmer 7 Water can flow past it.
  • The float chamber goes upstairs 5 into a bypass 9 over that in the outlet channel 3 empties. The free cross section of the bypass 9 is smaller than the cross section d of the outlet opening 6 , The free cross section of the bypass 9 can be adjusted using an adjustment device. In the example, the setting means is an adjusting screw 10 , It can also be formed by an aperture. The adjustability serves to adapt to the performance of the respective instantaneous water heater or the corresponding design of the flow meter.
  • The facility follows in the waterway - after the outlet channel 3 - a conventional differential pressure switch or another flow meter that switches on the heating elements of the instantaneous water heater at a certain flow rate (switch-on threshold) and switches them off at a specific flow rate (switch-off threshold).
  • For example, the drum-shaped float 7 a diameter of 14 mm to 19 mm, preferably 16 mm, and a length of 14 mm to 19 mm, preferably 16 mm, and a weight of about 0.7 kg / dm 3 to 0.9 kg / dm 3 , in particular 0 .8 kg / dm 3 . The internal dimensions of the float chamber 5 are so big that the swimmer 7 can swim freely in it.
  • The swimmer 7 is designed so that it always closes tightly regardless of the possible rotational position. When running after 1 has the outlet opening 6 or the transition to the channel 5 the shape of the barrel-shaped float 7 , When running after 2 is the outlet opening 6 circular. Because the swimmer 7 is spherical at the bottom, a secure seal is always guaranteed regardless of its rotational position and possibly skewed position. The shape is designed in such a way that the spherical contour at the circular outlet, even in the event of an inclination 6 can concern. The bullet 16 of the swimmer 7 has an undercut 17 to which the other body of the swimmer is attached 7 followed.
  • The swimmer 7 is made by plastic injection molding. The plastic granulate is foamed in the injection mold using a suitable blowing agent. This creates a float that is smooth on the outside, closed-celled and permanently pressure-resistant.
  • The height of the float chamber in the direction of gravity S. 5 is sized so that the float 7 has a sufficiently large floating path A between its lower layer and its upper layer. The floating path A is approximately 15 mm to 25 mm. He is supposed to help avoid the swimmer 7 with comparatively high water flow rates in front of the outlet opening 6 is sucked. The swimmer 7 and the walls of the float chamber 5 are designed so that the from the float chamber 5 guided movement of the swimmer 7 is permanently free. For this purpose, the walls of the float chamber preferably exist 5 made of plastic, which is fixing the float 7 avoided by corrosion residues. Elevations of the inner walls of the float chamber 5 can the free movement of the swimmer 7 support. Rib-like elevations of approximately 0.5 mm are suitable for this.
  • The design of the flow cross-sections and other mentioned dimensions is based on the respective nominal output of the instantaneous water heater type for which the device is intended, so that the following function is guaranteed:
    Under normal operating conditions, ie without special air pockets
    the float is in the main water flow 7 in its upper position. The main water flow flows from the inlet channel 2 unhindered in the outlet channel 3 and from this into the flow meter and to the radiators of the instantaneous water heater. The swimmer 7 takes up its upper position. Since the cross section or diameter D of the inlet opening 4 is larger than the cross section or diameter d of the outlet opening 6 , a flow of water inevitably flows at the float 7 over into the bypass 9 , This bypass flow helps the float to remain 7 in its upper, the outlet opening 6 non-occlusive location. It ensures that the swimmer 7 not in front of the outlet opening, even under the most varied pressure conditions 6 arrives as long as there is no air accumulation in the float chamber 5 forms.
  • Should there be smaller air bubbles in the float chamber that are not critical for the radiators 5 rise to the top, then they are transported away via the bypass flow so that they cannot collect into a functionally relevant air cushion.
  • If air bubbles occur in the main water flow in the event of malfunctions in the water network, these rise in the float chamber 5 upwards and can no longer go through the bypass because of their rapid volume 9 be promoted. The swimmer 7 then sinks in this air under the action of gravity S and reaches the outlet opening 6 which it closes. In this closed position it is held by the water network pressure. Due to the associated reduction in the throughput, the Flow meter the radiators off. The - still flowing - bypass flow is below the switch-on threshold of the flow meter, so that the radiators are switched off or stay on, although air is removed via the bypass flow as long as the nozzle valve is open.
  • Then when the user closes the nozzle - because he no longer receives hot water - it is reduced to the float 7 acting differential pressure, so that it gradually floats up again in the water and thus the outlet opening 6 releases, after which normal operation will resume at the next tap.
  • In the embodiment according to 2 the device described is not arranged in a base body forming a separate structural unit, but in a heating block 11 which integrates the radiator 12 , in particular bare wire radiators, of the instantaneous water heater. In 2 are the 1 corresponding elements with the same reference numerals. In 2 is a diaphragm as a setting means for the bypass flow 13 shown. The bypass 9 does not flow directly into the outlet channel here 3 , but in a water management room 14 in which one of the radiators 12 is arranged. The flow meter is in the water flow direction in front of the inlet channel 2 or after an outlet leading to a nozzle 15 of the heating block 11 arranged.
  • The mode of operation and the design options of the exemplary embodiment according to 2 correspond to that 1 Described.
  • In order to be able to visually check the functioning of the device in the event of a service, the float chamber has 5 at least one transparent wall through which the position of the float 7 is recognizable.

Claims (14)

  1. Device for influencing a flow meter of a instantaneous water heater, whereby a bypass to the main water flow is provided with a float chamber and a float floats up in the float chamber with water and sinks with air and a bypass flow flows in the lowered position, characterized in that at the float chamber ( 5 ) below an inlet opening ( 4 ) and an outlet at the bottom ( 6 ) for the main water flow that the float ( 7 ) in a lowered position the outlet opening ( 6 ) blocks, with the bypass ( 9 ) a bypass current flows that is smaller than the switch-off threshold of the flow meter that in the floated position of the float ( 7 ) a bypass flow flows and that the cross section of the inlet opening ( 4 ) or the inlet channel ( 2 ) larger than the cross section of the outlet opening ( 6 ) or the outlet channel ( 3 ) is.
  2. Device according to claim 1, characterized in that the cross section of the bypass ( 9 ) smaller than the cross section of the outlet opening ( 6 ) or the outlet channel ( 3 ) is.
  3. Device according to claim 1 or 2, characterized in that the cross section of the bypass ( 9 ) by means of an adjustment means ( 10 . 13 ) is adjustable.
  4. Device according to one of the preceding claims, characterized in that in the float chamber ( 5 ) an attack ( 8th ) for the swimmer ( 7 ) is arranged in such a way that even with swimmers swimming high ( 7 ) a bypass flow flows.
  5. Device according to one of the preceding claims, characterized in that the bypass ( 9 ) at the top of the float chamber ( 5 ) flows out.
  6. Device according to one of the preceding claims, characterized in that the float ( 7 ) has a weight of 0.7 kg / dm 3 to 0.9 kg / dm 3 , in particular 0.8 kg / dm 3 .
  7. Device according to one of the preceding claims, characterized in that the float ( 7 ) is designed rotationally symmetrical.
  8. Device according to one of the preceding claims, characterized in that the float ( 7 ) has a diameter of 14 mm to 19 mm, in particular 16 mm, and a length of 14 mm to 19 mm, in particular 16 mm, and the dimensions of the float chamber ( 5 ) are at least 1 mm larger.
  9. Device according to one of the preceding claims, characterized in that the float chamber ( 5 ) is designed in such a way that the float ( 7 ) has a floating distance of at least 15 mm to about 25 mm in it from its sunken position to its floating position.
  10. Device according to one of the preceding claims, characterized in that the inner wall of the float chamber ( 5 ) to guide the swimmer ( 7 ) Has ridges between which water and air next to the float ( 7 ) can go through.
  11. Device according to one of the preceding claims, characterized in that the float chamber ( 5 ) is made of plastic.
  12. Device according to one of the preceding claims, characterized in that the float chamber ( 5 ) has at least one transparent wall.
  13. Device according to one of the preceding claims, characterized in that the device in one of the radiators ( 12 ) of the heater block carrying the instantaneous water heater ( 11 ) is integrated.
  14. Device according to one of the preceding claims, characterized in that the float ( 7 ) from a ball ( 16 ) with an undercut ( 17 ) to which the other body of the swimmer ( 7 ) connects.
DE10307134.2A 2003-02-20 2003-02-20 Device for influencing a flow meter of a water heater Expired - Fee Related DE10307134B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10307134.2A DE10307134B4 (en) 2003-02-20 2003-02-20 Device for influencing a flow meter of a water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10307134.2A DE10307134B4 (en) 2003-02-20 2003-02-20 Device for influencing a flow meter of a water heater

Publications (2)

Publication Number Publication Date
DE10307134A1 true DE10307134A1 (en) 2004-09-02
DE10307134B4 DE10307134B4 (en) 2016-07-14

Family

ID=32797565

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10307134.2A Expired - Fee Related DE10307134B4 (en) 2003-02-20 2003-02-20 Device for influencing a flow meter of a water heater

Country Status (1)

Country Link
DE (1) DE10307134B4 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100595541C (en) 2008-03-07 2010-03-24 合肥工业大学 Force and displacement amount air-float type measurement method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166953B (en) * 1959-08-31 1964-04-02 Licentia Gmbh Electrically heated water heater
DE1404222A1 (en) * 1959-09-14 1968-10-24 Licentia Gmbh Heater
DE3443543A1 (en) * 1984-11-29 1986-06-05 Stiebel Eltron Gmbh & Co Kg Electric flow heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100595541C (en) 2008-03-07 2010-03-24 合肥工业大学 Force and displacement amount air-float type measurement method

Also Published As

Publication number Publication date
DE10307134B4 (en) 2016-07-14

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
R018 Grant decision by examination section/examining division
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee