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EP1533579A2 - Interrupteur à pression différentielle pour commuter la puissance des chauffe-eaux contrôlés hydrauliquement - Google Patents

Interrupteur à pression différentielle pour commuter la puissance des chauffe-eaux contrôlés hydrauliquement Download PDF

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Publication number
EP1533579A2
EP1533579A2 EP04090459A EP04090459A EP1533579A2 EP 1533579 A2 EP1533579 A2 EP 1533579A2 EP 04090459 A EP04090459 A EP 04090459A EP 04090459 A EP04090459 A EP 04090459A EP 1533579 A2 EP1533579 A2 EP 1533579A2
Authority
EP
European Patent Office
Prior art keywords
flow
switching device
pressure difference
difference switching
throughflow
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
EP04090459A
Other languages
German (de)
English (en)
Other versions
EP1533579B1 (fr
EP1533579A3 (fr
Inventor
Burkhard Porr
Klaus Beck
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.)
Gerdes OHG
Original Assignee
Gerdes OHG
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 Gerdes OHG filed Critical Gerdes OHG
Priority to PL04090459T priority Critical patent/PL1533579T3/pl
Publication of EP1533579A2 publication Critical patent/EP1533579A2/fr
Publication of EP1533579A3 publication Critical patent/EP1533579A3/fr
Application granted granted Critical
Publication of EP1533579B1 publication Critical patent/EP1533579B1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane

Definitions

  • the invention relates to a pressure difference switching device for switching the heating power of hydraulically controlled liquid water heaters, comprising a a liquid inlet with a liquid outlet connecting the liquid channel with a flow body arranged in it for generating temporary Flow pressure difference between inflow and outflow area before and after Throughflow body, a means of switching membrane in a corresponding to the inflow region Overpressure chamber and one corresponding to the discharge area Vacuum chamber divided diaphragm chamber and one via an actuator switch connected to the membrane.
  • a pressure difference switching device is part of hydraulically controlled instantaneous water heaters that control the heating capacity depending on the liquid flow.
  • the pressure difference switching device includes a mechanical switch. The for switching the electrical Contact required switching force is caused by temporary differential pressure on the Switching membrane acts, generates.
  • These are mainly electric water water heaters, comprising a water block connected to a cold water inlet, the operatively connected to this differential pressure switch, at least one with the water block operatively connected heating element and a downstream of the heating element arranged hot water outlet.
  • the function and assemblies of the device are attached directly or indirectly to a base plate.
  • Such water heater are well known.
  • Pressure difference switching devices for water heater known in which the switching device for a specific achievement in each case by the specific training of a Housing part of the device is determined. So it is known, for example, a drain pipe equipped with a Venturi nozzle. To such a switching device designed for desired switching power, a part of the housing must be specially designed and shaped so that interchangeable inserts are required in manufacturing tools are.
  • the invention is based on the objectives, a pressure difference switching device for Switching the heating power of hydraulically controlled liquid heaters to provide the avoidance of particularly to be manufactured and kept ready pressure differential mounting parts Optionally for different sized switching forces and / or device outputs should be usable.
  • the characteristics and functions of the switching device for generating reliably acting switching force, for suppressing irreversible Pressure loss, the repeatability of the pressure loss and the largest possible Prevention of switching hysteresis should be ensured.
  • the objects of the invention are in conjunction with the features of the aforementioned Pressure difference switching device achieved in that the flow body is formed and arranged in the liquid channel that he either in at least two positions with different angles of rotation about its in the flow direction extending body longitudinal axis can be brought, with different Rotary angle positions produce different flow cross sections.
  • one and the same built-in part namely the flow body universally adapted to the operation of the switching device for different switching forces or powers is available.
  • flow body is a relatively small or even tiny component having as such in the relatively small cross-section Liquid channel is arranged. This channel is easily accessible, so that the handling the flow body for insertion is simple and no technical Effort required.
  • the flow body forms an insert, which in at least two different rotational angle positions for correspondingly different flow cross-sections and thus for temporary positions determined by the respective position Differential pressure ensures.
  • the temporary differential pressure is kept under consideration of the permanent pressure loss in adaptation to the respectively to be achieved switching force or Device performance optimized.
  • the flow body is stepwise in at least two angular positions can be set. This achieves clearly defined, easily verifiable and recognizable as well as reproducible positions with associated, exactly given flow cross sections.
  • the flow body is designed and arranged so that it can be removed can be used in at least two insertion positions in the liquid channel. So can the pressure difference switching device according to the invention in particular also on site the switching / power requirement are adjusted.
  • the flow body can be inserted through the liquid inlet and is removable.
  • the flow body can be so very easy position and change position.
  • a preferred design exists in that the flow-through body with a handle element projecting towards the inlet is designed for insertion and removal. Such a handling element, convenient in the form of a flat tab or flag, can be comfortable in the area of the liquid inlet.
  • a preferred, particularly advantageous embodiment of the invention is in that the flow-through body has at least one continuous one along the body Having flow path and the channel discharge area behind the flow body is formed by a flow through hole adjoining the latter, wherein the flow cross-section of the flow body in dependence of its angular position with the flow cross-section of the flow through hole gets into different overlaps.
  • the flow body with respect to the adjoining him channel flow bore eccentric stored.
  • the flow-through path of the flow-through body is expedient as in the region of the body center directed, open at the body longitudinal extent groove formed, which is particularly advantageous as a radial groove, the radial depth preferably at least approximately half the cross-sectional diameter of the flow bore equivalent. It has been found that one already has one Flow-through groove with regard to flow rate or braking with change the degree of coverage in wide range achieved excellent results.
  • the degree of coverage and thus the effective Flow cross-section with a rotation angle adjustment to triple by 180 °.
  • the flow body advantageously in the form of a one-piece profile piece, free of pressure-deformable elements. Unlike for example in a built-in with pressure responsive, deforming O-ring on the one hand wear is avoided, and on the other hand one achieves a special degree other advantages such as low reversible pressure loss, repeatability of the Pressure loss and small switching hysteresis.
  • the throughflow body is through formed with the body longitudinal axis extending prism body, and the Fluid channel has a multi-edged in the channel cross-section inner wall, the one Multiple bearing seat for removable plug-in receptacle of the prism body in optional forms at least two different rotational angle positions.
  • the Prism body are formed by a straight regular prism.
  • the prism body is a hexagonal Has cross-sectional base and the polygonal inner wall of the bearing seat with star-shaped cross-section is designed such that the prism flow body displaceable in its rotational angle positions with 30 ° rotation angle steps or steps is. If necessary, other gradings can be provided.
  • a pressure difference switching device according to the invention 1 shows a housing with a lower part 11 and an upper part 12, one in the lower part 11 in its vertical center plane extending water channel 2 with water inlet 21 and Water outlet 22, one between the lower housing part 11 and the upper housing part 12th trained diaphragm chamber 3 and an electric circuit breaker 4.
  • a Switching diaphragm 33 divides the chamber 3 into an overpressure chamber 31 and a vacuum chamber 32.
  • the overpressure chamber 31 has a bottom wall 34, below the the water channel 2 runs.
  • the vacuum side, the switching diaphragm 33 is centered with a provided plate-like metal base, the center of a switch plunger 13 superimposed, consisting of a Wall bushing of the housing upper part 12 protrudes to there to actuate the Switch 4 to work against a loaded with compression spring 41 rocker switch 42.
  • the plunger 13 emerges from the upper part 13, so that over the rocker 42 switch contacts at least one pair of contact lugs 43 are closed.
  • One or more contact pairs 43 switch the circuit of at least one electrical heating element of a water heater, at the Power over the plunger 13 applied switching force is to be adjusted.
  • the pressure difference switching device is connected to the water channel 2 to to turn on the device when water is required.
  • an inventive flow body 5 is arranged.
  • the water channel 2 has a flow through hole 23 which in a End surface 230 opens, against which the flow body 5 is set.
  • the inflow area that is, in the flow direction S in front of the flow body 5
  • the Bottom wall 34 has a hole-like bore opening 311, over which the inflow area is connected to the pressure chamber 31.
  • the flow through-bore 23 In the discharge area behind the flow body 5 is the flow through-bore 23 via a vacuum through-hole 321 and a connecting line 322 connected to the vacuum chamber 32.
  • the flow body 5 acts with the flow through hole 23 together to put in the channel 2 temporary differential pressure between the holes 311 and 321 for pressurizing the switching diaphragm 33 via the two chambers 31, 32 to produce.
  • the bearing seat 6 is formed by a multi-edged channel inner wall in the channel cross-section 61 formed. As can be seen in detail from FIGS. 2, 3 and 5, the bearing wall is 61 with regular polygonal wall sections 24-angular.
  • the flow body 5 has body shape corresponding to the seat cross section. How to get in Detects detail of Fig. 4 and 5, the flow body 5 is substantially through formed a grades regular prism with hexagonal cross-section.
  • An area of hexahedral peripheral surface is open with a radial groove 51. The radial depth of the groove 51 corresponds to half the cross-sectional diameter of the flow passage bore 23.
  • Die Radialnut 51 also forms an axial groove, which is formed continuously along the body 51 is. This creates an axial flow path in the body 51. From It is particularly advantageous that the one-piece prism throughflow body 5 in one piece and is not druckverformbar. This is expedient as the housing part 1, 12 made Made of hard plastic.
  • the bearing seat 6 and the flow bore are 23 arranged in profile cross section eccentric to each other and educated. That is, the longitudinal axis 20 of the flow bore 23 and the Center axis 60 of the bearing seat 6 are offset radially and parallel to each other. How out 5, the main axis 50 of the prism body inserted into the seat 6 falls 51 with the bearing shaft 60 together, in each rotational angular position.
  • the bearing seat 6 for the prism body 51 forms a plug-in receptacle, in which the body 51 can be removably inserted in twelve rotational angular positions, so that twelve insertion positions are achieved with a rotation in rotation angle steps of 30 °.
  • the eccentricity between the flow bore 23 and the bearing seat 6 and the prism body 51 arise in the embodiment twelve different overlap positions with six different hatching degrees 24 shown between the opening of the bore 23 in the wall 230 and the end opening of the U-shaped Groove 51 in the voltage applied to the end wall 230 end wall of the prism body 51.
  • the flow rate in the individual stages is different, so that the temporary pressure difference is given in stages from a minimum value (0 ° -step) to a maximum value (180 ° -step) and provided according to choice.
  • the flow through-bore 23 has a circle diameter of about 6 mm, and the largest cross-sectional diameter of the seat receptacle is about twice as large.
  • this geometry is achieved in the embodiment in accordance with the dimensioning of the radial groove 51 quite Strömungsüberdeckungsgrade 24 in the range of about 3 mm 2 to 15 mm 2 . It has been found that the geometry with dimensions of said regions is particularly suitable for the invention.
  • the prism throughflow body 5 has a formed integrally with him flat tab or flag 52 on the edge of a Front side of the body 5 projects axially parallel and as such a handling element for easy and comfortable detection of the body 5 forms.
  • the tab 52 can the body 5 relatively far into the channel 2 and the plug-in receptacle of the seat 6 introduced or be taken from it. It is achieved that the inlet area relative mar syndromemig remains free of the groove portion of the prism body 5 and the shoulder wall 230th for conditioning of the body 5 at the other end side relatively far inward in the center region the lower part 11 can be provided.
  • the body 5 is detected on the tab 52 and depending on the switching / power requirement in one of the described angle step positions set.
  • One and the same switching device 1 is on the one hand by the choice of sitting position one and the same flow body 5 to type or performance of the operated with the device 1 instantaneous water heater adjusted and adjusted, and on the other hand, if necessary, also on site changing adaptation by removal of the body 5 and reinstated in changed Step position can be made.
  • the prism body 51 is formed and arranged so that the overpressure bore 311 remains sufficiently free in each position.
  • the overpressure bore 311 may be in the field the bore 311 on the wall 34 of the channel 2, a recess resulting from FIG. 1 to 3 62 are formed, which leaves the bore 311 free when the body 51 with the tab 52 e.g. is set in the illustrated in Fig. 5 240 ° position.
  • the tab 52 or another suitably shaped approach advantageously also be arranged so that the tab 52nd or the approach in at least one rotational angle position, e.g. in the 210 °, 240 ° and 270 ° positions in Fig. 5, a defined acting on the temporary pressure difference Overlap the overpressure bore 311 effect.

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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)
  • Multiple-Way Valves (AREA)
  • Measuring Fluid Pressure (AREA)
EP04090459A 2003-11-24 2004-11-24 Interrupteur à pression différentielle pour commuter la puissance des chauffe-eaux contrôlés hydrauliquement Ceased EP1533579B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04090459T PL1533579T3 (pl) 2003-11-24 2004-11-24 Urządzenie przełączające uruchamiane za pomocą różnicy ciśnień do włączania mocy grzejnej hydraulicznie sterowanych cieczowych grzejników przepływowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20318370U DE20318370U1 (de) 2003-11-24 2003-11-24 Druckdifferenz-Schalteinrichtung zum Schalten der Heizleistung von hydraulisch gesteuerten Flüssigkeits-Durchlauferhitzern
DE20318370U 2003-11-24

Publications (3)

Publication Number Publication Date
EP1533579A2 true EP1533579A2 (fr) 2005-05-25
EP1533579A3 EP1533579A3 (fr) 2006-03-15
EP1533579B1 EP1533579B1 (fr) 2008-10-08

Family

ID=31896722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04090459A Ceased EP1533579B1 (fr) 2003-11-24 2004-11-24 Interrupteur à pression différentielle pour commuter la puissance des chauffe-eaux contrôlés hydrauliquement

Country Status (3)

Country Link
EP (1) EP1533579B1 (fr)
DE (1) DE20318370U1 (fr)
PL (1) PL1533579T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104515308A (zh) * 2013-09-30 2015-04-15 樱花卫厨（中国）股份有限公司 壁挂炉用气流监控装置的改良结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719889A (en) * 1950-01-27 1955-10-04 Hays Mfg Co Fluid flow responsive device
DE1242772B (de) * 1964-01-30 1967-06-22 Siemens Electrogeraete Ges Mit Elektrischer Durchlauferhitzer mit Druckdifferenzschalter
DE1270773B (de) * 1959-09-22 1968-06-20 Licentia Gmbh Schutzeinrichtung fuer einen elektrisch beheizten Durchlauferhitzer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719889A (en) * 1950-01-27 1955-10-04 Hays Mfg Co Fluid flow responsive device
DE1270773B (de) * 1959-09-22 1968-06-20 Licentia Gmbh Schutzeinrichtung fuer einen elektrisch beheizten Durchlauferhitzer
DE1242772B (de) * 1964-01-30 1967-06-22 Siemens Electrogeraete Ges Mit Elektrischer Durchlauferhitzer mit Druckdifferenzschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104515308A (zh) * 2013-09-30 2015-04-15 樱花卫厨（中国）股份有限公司 壁挂炉用气流监控装置的改良结构

Also Published As

Publication number Publication date
EP1533579B1 (fr) 2008-10-08
EP1533579A3 (fr) 2006-03-15
DE20318370U1 (de) 2004-02-19
PL1533579T3 (pl) 2009-04-30

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