EP0483326A1 - Dispositif et procede pour le reglage des conditions d'ecoulement d'un volume d'eau d'un circuit de chaudiere vers un circuit de chauffage dans des installations de chauffage a eau chaude. - Google Patents

Dispositif et procede pour le reglage des conditions d'ecoulement d'un volume d'eau d'un circuit de chaudiere vers un circuit de chauffage dans des installations de chauffage a eau chaude.

Info

Publication number
EP0483326A1
EP0483326A1 EP91909693A EP91909693A EP0483326A1 EP 0483326 A1 EP0483326 A1 EP 0483326A1 EP 91909693 A EP91909693 A EP 91909693A EP 91909693 A EP91909693 A EP 91909693A EP 0483326 A1 EP0483326 A1 EP 0483326A1
Authority
EP
European Patent Office
Prior art keywords
heating
flow
bell
switching bell
switching
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
EP91909693A
Other languages
German (de)
English (en)
Other versions
EP0483326B1 (fr
Inventor
Hans Latarius
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.)
Tekmar Angewandte Elektronik GmbH and Co KG
Original Assignee
Tekmar Angewandte Elektronik 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 Tekmar Angewandte Elektronik GmbH and Co KG filed Critical Tekmar Angewandte Elektronik GmbH and Co KG
Publication of EP0483326A1 publication Critical patent/EP0483326A1/fr
Application granted granted Critical
Publication of EP0483326B1 publication Critical patent/EP0483326B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
    • F24D19/1033—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve motor operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86509—Sequentially progressive opening or closing of plural ports
    • Y10T137/86517—With subsequent closing of first port

Definitions

  • the invention relates to an arrangement and a method for controlling the water flow rate ratio of the boiler circuit to the heating circuit in hot water, in particular low-temperature heating systems, with a four-way mixer and a control device influencing its position, which is designed such that it changes a variable when the mixer is fully open Dosing of the return water admixture in the heating flow enables. Furthermore, the invention relates to a specially designed four-way mixer for use in such an arrangement or such a method.
  • Boiler flow 80 ° C
  • a conventional mixer cannot cope with these requirements. For this reason, an appropriately dimensioned bypass connection between the heating flow and return has generally been created. In this way, a constant amount of return water was fed to the flow irrespective of the position of the mixer, with the advantage that the amount of water in the heating circuit increased and the mixer setting angle was used.
  • the object of the invention is to optimize the above-described desired control behavior and to achieve it with considerably less construction, maintenance and operational effort.
  • the arrangement according to the invention is characterized in that the four-way mixer is designed as a bell mixer with a stationary profile disk and a rotatable switching bell, the switching bell being slidably arranged with a sealing surface on a preferably flat seating surface of the profile disk; that the profile plate is provided with at least three separate through openings, a first of which is connected to the boiler flow, a second to the heating flow and a third to the boiler return; that the switching bell is arranged in a mixing chamber connected to the heating return, is pressurized on the outside by the heating return water, • delimits a connecting channel, spans an angular range of the profile disk and, over a limited range of rotation, the first connected to the boiler flow Through hole short-circuits with the second through hole leading to the heating flow (fully open mixer) and at the same time releases a variable part of the opening cross section of the second passage opening to the flow chamber connected to the heating return (HR) for the admixture of return water.
  • the four-way mixer is designed as a
  • the invention achieves a sensitive control behavior over the entire mixer setting range, without a controlled bypass, simply by special design of the mixer itself. Instead of a separate bypass, the connecting channel in the switching bell enables the supply of the maximum boiler flow water quantity with a variable amount of return water. This means that even in the upper setting range, sensitive control can be achieved by changing the amount of return water.
  • the costly arrangement of an adjustable bypass as well as its control engineering connection with the position transmitter of the mixer are eliminated.
  • the contact pressure forces acting on the switching bell due to the return water pressure are sufficient for the switch bell to rest tightly on its flat seat surface on the profiled disk; however, the switching bell is preferably resiliently pretensioned against the profiled disk with little force.
  • the through-openings have at least partially kidney-shaped opening cross-sections in a development of the invention.
  • the second passage opening connected to the heating flow is preferably much larger than the two other passage openings of the profile disk, so that the necessary flow cross sections in the heating flow are available both for the inflow of the boiler flow water quantity and for part of the heating return water stand.
  • the profile disk preferably consists of abrasion- and / or corrosion-resistant material, in particular hardened or alloy steel, V2A and / or ceramic material.
  • the switching bell preferably consists of softer material, in particular of plastic, and can be designed as an injection molded part. The specified material combination V2A / plastic for the profile disk and the switching bell has particular advantages.
  • the structural and mechanical outlay in the arrangement according to the invention is significantly reduced in comparison to the generic mixer-bypass combination. Accordingly, the life of the new arrangement is much longer; it can be expected that the lifespan of the bell mixer according to the invention corresponds to that of the associated heating systems (25-30 years).
  • the method according to the invention for operating the control arrangement is characterized in that, after a sudden increase in heat demand, the switching bell is first rotated in a first direction and brought into a position corresponding to a fully open mixer position, the heating water temperature being monitored and with a limit value is compared; that when turning the switching bell in the first direction, the second through opening is increasingly covered by the switching bell and the inflow of heating return water to the heating flow is reduced until the admixture of return water is minimized in one end position; and that when the limit temperature is reached, the switching bell is rotated in the opposite second direction of rotation, an increasingly large return flow portion is introduced through the second through opening into the heating flow, while the flow path from the boiler flow to the heating flow is kept open at least initially.
  • the invention further provides a four-way mixer, which is characterized in that a profiled disc with at least three separate through openings is permanently installed in a mixer housing; that a crescent-shaped switching bell of a flat seat of the profile plate is slidably mounted and rotatable about an axis of rotation extending at right angles to the seat; that the switching bell delimits a crescent-shaped connecting channel, which is dimensioned such that, in a rotational position of the switching bell, it connects the full opening cross section of a first profile disk through opening and a cross-sectional sector of the second profile disk through opening, while another sector of the second through opening of the switching bell remains uncovered, and in a second rotational position the full opening cross section of the first profile disk opening with a much larger part of the second profile disc opening connects.
  • This four-way mixer has the advantages mentioned above in the arrangement according to the invention for controlling the water flow rate ratio in hot water heating systems.
  • the four-way mixer according to the invention also has the same advantages, in particular with regard to smooth operation, material resistance, tightness and low structural complexity, in other control or regulating arrangements. This is especially true if the control advantages of mixer-bypass combinations are to be achieved with a correspondingly reduced constructional and operational expenditure.
  • suitable coordination of the opening cross-sections of the through-openings and their arrangement relative to the rotatable switching bell different mixing ratios can be set in certain setting ranges, and in particular the flow rates in one mixer branch can be adjusted and kept essentially unchanged in another mixer branch.
  • FIG. 1 shows a front view of the mixer housing of an embodiment of the invention with the mixing chamber open and the mixer actuator disassembled;
  • Fig. 2 is a sectional view in the direction of arrows II-II of Fig. 1;
  • Fig. 3 is a sectional view in the direction of the arrows
  • 4A to 4C show different views of a mixer actuator
  • FIG. 5 shows a front view of the mixer actuator in a setting adjusted compared to FIG. 4A.
  • FIG. 6 shows a basic circuit diagram of an embodiment of the device controlling the mixer actuator.
  • FIGS. 1 to 3 An exemplary embodiment of a four-way mixer with an integrated heating circulation pump is shown in FIGS. 1 to 3. It has connection pieces for the boiler flow KV, the boiler return KR, the heating flow HV and the heating return HR.
  • the mixer housing 1 contains the mixing chamber 3 shown open in FIG. 1, in which the essential components of the mixer actuator, designated as a whole by 4, are installed.
  • a circulating pump is operationally installed in a housing receptacle 5 and integrated into the heating flow HV.
  • the four-way mixer is designed as a bell mixer. It has a profiled disk 6 which is firmly connected to the bottom wall of the mixing chamber 3, a crescent-shaped switching bell 7 (FIG. 5) which extends over a partial arc of more than 180 ° and a switching shaft 8 which is driven by an actuator and which is connected to the Switch bell 7 is rotatably connected and is rotatable relative to the stationary profile plate 6 about an axis of rotation 9.
  • the profile disk 6 has three kidney-shaped through openings 11, 12 and 13 which open into separate flow chambers 14, 15, 16 located behind the mixing chamber 3.
  • the first through opening 11 with its associated chamber 14 is connected to KV
  • the second through opening 12 with its associated flow chamber 15 is connected to HV
  • the third through opening 13 with its associated flow chamber 16 is connected to KR.
  • the heating return HR opens via a radial opening 17 into a flow chamber 18 which is part of the mixing chamber 3 and surrounds the switching bell 7 on the outside.
  • the switching bell 7 delimits a connecting channel 19 which spans an arc of a little more than 180 ° and is separated from the flow chamber 18 assigned to the heating return HR by the switching bell.
  • the switching bell 7 is held in contact with the aid of a helical spring 20 on the side of the profiled disk 6 facing the connecting channel 19.
  • the coil spring 20 is supported against a housing cover 21 which is detachably connected to the housing 1 and seals the mixing chamber 18 from the environment (the seals, especially on the passage of the control shaft 8, are of a known design and are not shown in the drawing).
  • FIGS. 4A, B and C and 5 which show the essential components of the mixer actuator 4, are discussed below.
  • FIG. 4A shows a view of the mixer actuator 4 in the direction of the axis of rotation 9, specifically in a position which corresponds to the operating position at a mixer setting angle of approximately 90 °.
  • the switching bell 7 is exposed on its outside by the pressure of the HR water in the chamber 18. burdens.
  • the through openings 11 to 13 of the profiled disk each open into separate flow chambers.
  • the profiled disk passage opening 11 connected to KV is passed via the connecting channel 19 into the passage opening 12, which leads to the heating flow HV.
  • the second passage opening 12 also receives return water from the flow chamber 18 in this mixer position. The rest of the return water flows into the boiler return, the through opening 13 of which is open to the HR flow chamber 18.
  • the switching bell 7 is rotated counterclockwise to an end position corresponding to the fully open mixer.
  • the crescent-shaped switching bell 7 in this position shorts the passage opening 11 leading to the boiler flow with the passage opening 12 leading to the heating flow and closes the latter off from the HR flow chamber 18, so that no return water flows into the Heating flow can flow.
  • this position is an end position which can be switched on briefly if the heat requirement in the heating circuit increases suddenly, for example when changing from the night setback, before the mixer returns to the normal operating position (FIG. 4A ) is moved back (so as not to exceed the limit temperature in the HV).
  • any amount of return water which can be regulated as desired can also be mixed in via the section of the second passage opening 12 left open by the switching bell.
  • the control characteristic can thus be set comparable to that of the mixer known from DE-PS 32 07 427 with bypass. This is achieved with a suitable shape, especially of the first and second through openings 11 and 12 (the profiles shown in FIGS. 1 and 4A and 5 are only to be understood as example profiles. sen).
  • the desired mixing ratio can be set simply by rotating the switching bell 7 with a corresponding change in the cross section of the profiles of the through openings 11, 12.
  • the rotational stroke of the switching bell 7 is slightly less than 180 ° in the example shown.
  • the choice of material for the profile disc 6 and the crescent-shaped switching bell 7 is also essential for a long service life of the mixer actuator 4 and its smooth operation.
  • an abrasion and corrosion-resistant material in particular V2A or a ceramic material, is suitable;
  • the switching bell 7 consists of a comparatively soft plastic material which is provided on the flat sealing surface with the best possible sealing properties. Due to frequent switching movements, the bell material can work off to a greater or lesser extent in the area of the sealing surface 23; The pressure of the return medium in the flow chamber 18, with the support of the compression spring 20, ensures that the system is always saturated and sealed while compensating for the shift bell wear.
  • FIG. 6 shows a schematic circuit diagram of an electrical arrangement for regulating the servomotor 25 which actuates the control shaft 8. The structure and mode of operation of the circuit arrangement are described below with reference to the actuating response of the rotatable switching bell 7 in FIGS. 4 and 5.
  • the servomotor 25 is fed by an operating current source 26.
  • a switch group with switches 31, 32 and 33 is integrated between driver stage 28 and motor 25. Each switch is a changeover switch trained and can switch between the two positions a and b.
  • the relays 27A and 27Z are switched as a function of a temperature control device 29 known per se with a three-point transmitter 30.
  • a thermostat 34 influenced by the heating flow temperature serves as a limit value transmitter and gives a limit value signal to the controller 29 when a limit value of the flow temperature is reached.
  • the schematic circuit arrangement according to FIG. 6 is described in the following for the typical operating case of the transition from a night reduction to day operation.
  • the transition begins with an abrupt heat request, which is communicated via the controller 29, 30 to the arrangement, the relay 27A closing. All limit switches 31, 32 and 33 are in their position a.
  • the servomotor 25 then runs from the end position corresponding to the night reduction (switching bell 7 is in the lower half in FIG. 4A, short-circuits KR and KV and opens the second passage opening 12 for heating flow for the full return flow). In this switch position, the servomotor runs rapidly into the shift bell position shown in FIG. 4A.
  • the thermostat 34 monitors the heating flow temperature and gives a switching command to the controller 29 when one is reached Limit temperature. This may well be the case before reaching the outermost end position according to FIG. 5.
  • Relay 27A is now opened and relay 27Z closed via the three-way actuator 30.
  • Limit switch 33 is in position a.
  • the motor is thereby reversed, rotates backwards and provides for an enlargement of the cross-section of the second passage opening 12 that is free towards the mixing chamber 18. An increasing amount of return water is mixed into the heating flow. If the critical limit is undershot, the relay 27Z opens the associated switch and the driver stage 28Z is de-energized. This is followed by a three-point control known per se, in which the servomotor 25 rotates the switching bell counterclockwise or clockwise when certain limit temperatures are exceeded or undershot and interrupts the rotary movement in phases again.
  • control arrangement according to the invention enables full use of the actuating range and sensitive control with only a single rotatable actuator, namely the switching bell 8.
  • the operational effort is minimized, the service life is comparatively significantly increased and the reliability is improved accordingly.
  • the configuration of the bell, training and abutment points of the spring, the formation of the sealing surface between the cap 7 and profiled disc 6 and in particular the form, • arrangement and number to the through holes used are ated vari ⁇ to adapt to existing designs of the housing and / or to achieve desired control characteristics.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Multiple-Way Valves (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Accessories For Mixers (AREA)

Abstract

Les conditions d'écoulement d'un volume d'eau sont réglées au moyen d'un mélangeur à cloche (4) présentant un disque profilé (6) et une cloche de distribution rotative (7) en forme générale de croissant. Le disque profilé comporte au moins trois ouvertures traversantes, dont une première est en communication avec la conduite d'entrée de la chaudière (KV), une seconde (12) avec la conduite montante de chauffage (HV) et une troisième avec la conduite de retour de la chaudière. La cloche de distribution (7) est sollicitée à l'extérieur par la pression de l'eau de retour du chauffage et comporte, à l'intérieur, un canal de communication (19). La cloche de distribution court-circuite, sur une zone limitée de position en rotation, l'entrée de la chaudière par l'intermédiaire de la seconde ouverture traversante (12) avec la conduite montante de chauffage, et libère en même temps un domaine variable de la section d'ouverture de la seconde ouverture traversante, pour le mélange de l'eau en retour. On obtient ainsi un réglage optimum en ne faisant appel qu'à un nombre restreint de moyens mis en oeuvre sur le plan construction, entretien et exploitation.
EP19910909693 1990-05-19 1991-05-21 Dispositif et procede pour le reglage des conditions d'ecoulement d'un volume d'eau d'un circuit de chaudiere vers un circuit de chauffage dans des installations de chauffage a eau chaude Expired - Lifetime EP0483326B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4016221 1990-05-19
DE19904016221 DE4016221A1 (de) 1990-05-19 1990-05-19 Anordnung und verfahren zum steuern des wassermengendurchlaufverhaeltnisses von kesselkreislauf zu heizkreislauf in warmwasserheizungsanlagen
PCT/EP1991/000946 WO1991018246A1 (fr) 1990-05-19 1991-05-21 Dispositif et procede pour le reglage des conditions d'ecoulement d'un volume d'eau d'un circuit de chaudiere vers un circuit de chauffage dans des installations de chauffage a eau chaude

Publications (2)

Publication Number Publication Date
EP0483326A1 true EP0483326A1 (fr) 1992-05-06
EP0483326B1 EP0483326B1 (fr) 1994-09-21

Family

ID=6406825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910909693 Expired - Lifetime EP0483326B1 (fr) 1990-05-19 1991-05-21 Dispositif et procede pour le reglage des conditions d'ecoulement d'un volume d'eau d'un circuit de chaudiere vers un circuit de chauffage dans des installations de chauffage a eau chaude

Country Status (7)

Country Link
US (1) US5248084A (fr)
EP (1) EP0483326B1 (fr)
JP (1) JP2891774B2 (fr)
AT (1) ATE112037T1 (fr)
CA (1) CA2063824C (fr)
DE (2) DE4016221A1 (fr)
WO (1) WO1991018246A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE4243366A1 (en) * 1992-12-21 1993-07-01 Rene Legere Control unit for hot water heating-system - contains precision extruded part with pipes, overflow valves and four=way mixer
US6766835B1 (en) * 2002-09-23 2004-07-27 Raoul G. Fima Tank monitor system
US20060272704A1 (en) * 2002-09-23 2006-12-07 R. Giovanni Fima Systems and methods for monitoring and controlling fluid consumption
US20060272830A1 (en) * 2002-09-23 2006-12-07 R. Giovanni Fima Systems and methods for monitoring and controlling water consumption
US20060168611A1 (en) * 2002-09-23 2006-07-27 Fima R G Systems and methods for monitoring and controlling water consumption
US20050235306A1 (en) * 2002-09-23 2005-10-20 Fima R G Systems and methods for monitoring and controlling water consumption
US7048200B2 (en) 2003-06-27 2006-05-23 Taco, Inc. Integrated injection-pumping fixture for transferring heat between higher and lower-temperature loops in a hydronic heating system
US7028768B2 (en) * 2003-08-20 2006-04-18 Itt Manufacturing Enterprises, Inc. Fluid heat exchange control system
GB2447860B (en) * 2006-11-21 2011-08-03 Salamander Pumped Shower Systems Ltd Improvements in fluid pumping systems
US7708010B2 (en) * 2007-03-05 2010-05-04 Taco Inc. Solar heating systems
CN111442322B (zh) * 2020-05-13 2025-04-08 北京首创热力股份有限公司 一种供热管网系统及其调控方法

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AT298735B (de) * 1968-09-05 1972-05-25 Centra Buerkle Kg Albert Mehrweg-Schieber
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Also Published As

Publication number Publication date
JP2891774B2 (ja) 1999-05-17
DE4016221A1 (de) 1991-11-21
DE59103036D1 (de) 1994-10-27
JPH05500264A (ja) 1993-01-21
EP0483326B1 (fr) 1994-09-21
WO1991018246A1 (fr) 1991-11-28
CA2063824A1 (fr) 1991-11-20
CA2063824C (fr) 1998-07-14
US5248084A (en) 1993-09-28
ATE112037T1 (de) 1994-10-15

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