EP0041163B1 - Dispositif de sécurité commandé thermiquement pour chaudière de chauffage dans des installations de chauffage à circuit hydraulique fermé - Google Patents

Dispositif de sécurité commandé thermiquement pour chaudière de chauffage dans des installations de chauffage à circuit hydraulique fermé Download PDF

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Publication number
EP0041163B1
EP0041163B1 EP81103711A EP81103711A EP0041163B1 EP 0041163 B1 EP0041163 B1 EP 0041163B1 EP 81103711 A EP81103711 A EP 81103711A EP 81103711 A EP81103711 A EP 81103711A EP 0041163 B1 EP0041163 B1 EP 0041163B1
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EP
European Patent Office
Prior art keywords
valve
safety device
controlled
temperature
drain
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.)
Expired
Application number
EP81103711A
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German (de)
English (en)
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EP0041163A3 (en
EP0041163A2 (fr
Inventor
Arend Sasserath
Willi Hecking
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.)
Hans Sasserath GmbH and Co KG
Original Assignee
Hans Sasserath 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 Hans Sasserath GmbH and Co KG filed Critical Hans Sasserath GmbH and Co KG
Priority to AT81103711T priority Critical patent/ATE8814T1/de
Publication of EP0041163A2 publication Critical patent/EP0041163A2/fr
Publication of EP0041163A3 publication Critical patent/EP0041163A3/de
Application granted granted Critical
Publication of EP0041163B1 publication Critical patent/EP0041163B1/fr
Expired legal-status Critical Current

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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
    • 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
    • F24H9/2057—Arrangement or mounting of control or safety devices for water heaters using solid fuel

Definitions

  • the invention relates to a thermally controlled safety device for boilers heated with solid fuels in closed heating systems, in which in the event of an excess temperature in the heating system cold fresh water from the supply line is let into the system of the heating system and hot heating water is drained into a drain, comprising: one to the system of the heating system, fresh water supply line connected to the supply line, in which a pressure reducer, a temperature-controlled valve and a pipe separator are arranged in series, and a drain line connected to the system of the heating system, in which a thermal discharge safety device is arranged, the thermal discharge safety device from is controlled by the same temperature sensor acted upon by the heating water temperature as the temperature-controlled valve and opens at a slightly higher temperature than this valve.
  • Heating systems are usually designed as closed heating systems. A higher than atmospheric pressure can arise in the heating system system. Pressure fluctuations are absorbed by a pressure compensation vessel. Such closed heating systems must contain a safety valve so that heating water is blown off in the event of an excessive pressure in the system and in the boiler. This type of blow-off takes place when the boiler heats the heating water too strongly. Blowing off heating water in closed systems is very annoying, since the desired overpressure can then no longer be maintained at normal heating water temperature.
  • the heat supply and thus the temperature of the heating water can be conveniently controlled so that overtemperature and overpressure that would trigger the safety valve hardly occur.
  • the heating system In order to be able to design the heating system on the one hand as a closed heating system in heating systems in which the boiler is heated with solid fuels and is accordingly less easy to regulate, and on the other hand to prevent the safety valve from responding undesirably frequently, it is known to have one in the hot water side Boiler installed water heater or a heat exchanger specially installed as a safety device to use a thermally controlled valve. If the temperature of the heating water exceeds a critical value, this thermally controlled valve opens. It sucks cold fresh water from the supply line through the water heater or heat exchanger, extracts heat from the heating water and drains off to a drain as warm water.
  • This thermally controlled valve is known as a «thermal safety device». This thermal process safety device removes heat from the boiler and thus cools down the temperature of the heating water to an uncritical value.
  • This process requires a boiler with a water heater or a special heat exchanger. However, it is not possible to secure a boiler in this way without a water heater or separate heat exchanger. However, this is precisely the task that often arises when a boiler previously operated with oil or gas is to be converted to solid fuels.
  • An arrangement is known (DE-A-27 13 155) which ensures that the closed heating system is protected against overtemperature and thus overpressure even with such boilers.
  • two temperature-controlled valves are provided, which are controlled by temperature sensors in the flow and open at slightly different temperatures.
  • a fresh water supply line connected to the supply line is connected to the return line of the heating system via the first valve opening at the lower temperature.
  • the second temperature-controlled valve which opens at the higher temperature, connects the boiler flow to a drain. Since a permanent connection between a supply line and the heating system is not permitted, the first temperature-controlled valve is connected to the return via a pipe separator.
  • a conventional pressure limiter is connected upstream of this valve.
  • the first temperature-controlled valve is opened first. This gives the outlet pressure of the pressure limiter to the pipe separator, which then establishes the connection to the heating system. Since the system is closed, no water flows into the system at first. At a slightly higher temperature, however, the second temperature-controlled valve (thermal discharge safety device) is opened so that warm water flows out of the boiler flow and cold water can flow into the system from the supply line. When the boiler has cooled down to an uncritical temperature, the two temperature-controlled valves close in succession and the pipe separator again mechanically separates the supply line from the heating system
  • thermal discharge safeguards are provided which control the cold water inflow and hot water outflow.
  • thermal drain safeguards are relatively large valves This cross-section, since the entire cold water inflow or hot water outflow must pass through these thermal discharge safeguards.
  • the pipe separator is connected in series with the first thermal drain safety device. The cold fresh water flowing through the pipe separator when the flow connection is established first flows through the first thermal discharge safety device and then through the flow channel of the pipe separator.
  • the object of the invention is to design a thermally controlled safety device of the type defined at the outset in a simpler and more space-saving manner.
  • the flow connection of the pipe separator via which the entire fresh water flow is to flow, is thus directly connected to the outlet of the pressure reducer. There is no flow as long as the pipe separator is still in its rest position. Only a small poppet valve, which controls the control connection of the pipe separator, is controlled by the temperature of the heating water. The entire fresh water flow does not need to flow through this poppet valve, but only the amount of water that moves the pipe separator into its working position. This saves a thermal process safety device. The arrangement becomes simpler and more compact.
  • 10 denotes a boiler heated with solid fuels. From the boiler 10 there is a supply 12 of a closed heating system, the return 14 is returned to the boiler 10.
  • the closed heating system contains an expansion vessel 16 which compensates for the normal thermal expansion of the water in the closed heating system.
  • a safety valve 18 is provided on the boiler 10.
  • a fresh water supply line which is connected to the supply line and through which cold fresh water can be supplied, is designated by 20.
  • the pressure of the fresh water supply line 20 is reduced via a pressure reducer 22 to a pressure which is conducive to the boiler 10 and the heating system and which is below the response pressure of the safety valve 18.
  • a pipe separator 24 in series with a backflow preventer 26, which lies between the outlet connection 28 of the pipe separator 24 and the heating system.
  • the pipe separator has a flow connection 30 of large cross section and a control connection 32 of small cross section.
  • the flow connection 30 is connected directly to the outlet of the pressure reducer 22.
  • the control connection 32 which is also connected to the outlet of the pressure reducer, is controlled by a thermally controlled valve 34 designed as a poppet valve.
  • a temperature sensor 36 controls a thermal discharge safety device 38 by means of an actuator 40.
  • the thermal discharge safety device 38 is a thermally controlled valve which connects a line 42 connected to the system of the heating system to an outlet 44.
  • the valve 34 is controlled by the valve tappet 46, which is longitudinally displaceable by the actuator 40 of the temperature sensor 36 and at the same time controls the valve plate in the thermal discharge safety device 38.
  • the pressure reducer 22 has a housing 47, in which a membrane 48 is clamped, which is loaded by a spring 50.
  • the space below the membrane is divided by a partition 52 into a chamber 54 and an inlet chamber 56.
  • a valve tappet 58 of a pressure reducing valve 60 which cooperates with a valve seat 62 formed at the lower end of the housing 46, is sealingly guided through the partition wall 52.
  • a cross bore 64 running in the valve tappet 58 connects the outlet 66 of the pressure reducer downstream of the valve 60 to the chamber 54.
  • the inlet chamber 56 is connected to the fresh water supply line 20 (FIG. 1) via a connection 68.
  • the pipe separator 24 has a cylindrical housing 70, on which the inlet-side flow connection 30 and an outlet connection 28 are provided on opposite sides.
  • the housing 70 has an outlet 76 in its lower end part.
  • In the flow connection 30 there is an inlet sleeve 78 which is closed at the end at its end facing away from the flow connection 30 and has lateral outlet openings 80.
  • On the inlet sleeve 78 an annular piston 82 guided in the housing 70 and having a sleeve-shaped shaft 84, which surrounds the inlet sleeve 78, is slidable.
  • the control connection 32 opens in the annular space 86 between the housing 70 and the annular piston 82.
  • the outlet connection 28 is surrounded by a connecting piece 90 which projects into the housing 70 and is provided with an inner seal 88.
  • the sleeve-shaped shaft 84 of the annular piston 82 can be inserted in a sealing manner during a working stroke thereof.
  • the shaft 84 has an undercut 92 on its inner wall, via which, after the shaft 84 has been inserted into the socket 90, a connection is established between the lateral outlet openings 80 of the inlet sleeve 78 and the bore of the shaft 84 connected to the outlet connection 28.
  • the annular piston is loaded by a compression spring 94 so that it is in the rest position shown in FIG. 2 in the absence of a control pressure at the control connection 32.
  • the actuator 40 and the valve plunger 46 are controlled by the temperature sensor 36.
  • the thermal leakage protection contains a housing 96 with a connection 98 which is connected to the line 42 (FIG. 1) and a connection 100 which is connected to the outlet 44.
  • a valve seat 102 is formed in the housing 96, on which a valve disk 104 is seated.
  • the valve plate 104 is loaded by a spring 106. It has a collar 108 which is sealingly guided in the housing 96.
  • the housing 96 has a neck 110 coaxial with the collar 108, into which the spring 106 supported on an annular spring abutment 112 projects.
  • a chamber 114 is thus formed in the connection piece 110 and is sealed off from the inlet-side connection 98 by the collar 108 and its guidance in the housing 96.
  • the actuator 40 with the valve tappet 46 sits on the housing 96 coaxially with the valve seat 102 and the valve plate 104.
  • the valve tappet 46 is sealingly guided through the valve plate 104. It has a shoulder 116 which, after a certain stroke of the valve tappet 46, engages the valve plate 104 and presses the valve against the action of the spring 106.
  • the housing 47 of the pressure reducer 22 is connected to the socket 110.
  • the housing 47 forms a valve seat 117 coaxial with the valve seat 62.
  • the valve tappet 46 extends through the valve seat 117 and carries at its end the valve disk 118 of the temperature-controlled valve 34 (FIG. 1).
  • a valve disk 120 is also attached to the valve tappet 46, which cooperates with a valve seat 122 and, after the valve tappet 46 has opened the valve 34, closes the passage 124 formed along the valve tappet 46.
  • This passage 124 is connected to the connection 100 of the thermal discharge safety device via the chamber 114 and a bore 126 formed in the valve tappet 46.
  • the valve tappet 46 consists of two sections 46a and 46b which are displaceably guided to one another.
  • a preloaded spring 128 is arranged between the sections 46a and 46b.
  • One section 46a bears under the action of the spring 128 against a stop 129 of the other section 46b. If the valve 34 is open and the valve plate 120 bears against the valve seat 122, the actuator 40 can under certain circumstances push the valve tappet 46 further up in FIG. 2. Since the valve plate 120 abuts the valve seat 122 and thus limits the upward movement of the upper section 46b of the valve lifter 46, the additional movement of the lower section 46a of the valve lifter is absorbed by compressing the spring 128. In normal operation, the two sections 46a and 46b act like a rigid connection, since the preload of the spring 128 is normally not exceeded.
  • the upper section 46b following the valve plate 120, contains a cup-shaped part 130, in which a head piece 132 of the lower section 46a is guided.
  • the spring 128 sits between the bottom of the cup-shaped part 130 and the head piece 132.
  • the cup-shaped part 130 forms a shoulder 134, against which a compression spring 136, which is supported on the housing 47, bears.
  • the valve lifter 46 is preloaded in such a way that the valve disc 118 is normally seated on the valve seat 117 and the valve 34 is closed.
  • the valve 34 is pressed open by the actuator 40 via the valve tappet 46 against the action of the compression spring 136.
  • the control connection 32 of the pipe separator 24 branches off between the valves 34 and 120, 122.
  • the pressure reducer 22 with its pressure reducing valve 60 is arranged coaxially with the valve tappet 46 and the valves 34 and 120, 122, respectively. In the fully open state, the pressure reducing valve 60 closes the valve 34 which controls the control connection 32 and the second valve 120, 122.
  • the shoulder 116 rests on the valve plate 104 and opens the thermal outlet Running safety device 38. Warm water can now flow out of the heating system via the thermal safety device 38 into the drain 44. So cold fresh water is let into the heating system, while warm heating water flows away. This will cool down the heating system.
  • the valve 34 closes.
  • the valve plate 120 lifts off the valve seat 122.
  • the annular space 86 is connected to the connection 100 of the thermal discharge safety device 38 via the passage 124. The water from the annular space 86 can thus flow off, and the annular piston 82 with the shaft 84 returns to the illustrated starting position under the influence of the compression spring 94.
  • the arrangement described has another advantage. If the pressure in the supply line should collapse, this means that the pressure reducer 22 opens fully under the influence of the spring 50, that is to say the pressure reducer valve 60 is moved downward enough to close the valve 34 while overcoming the spring 128. At the same time, the valve plate 120 lifts off the valve seat 122, so that in this case the pipe separator 24 also returns to the rest position shown. When the pressure in the supply line collapses, a safe separation of the heating system and supply line is guaranteed.

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  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electric Stoves And Ranges (AREA)
  • Frying-Pans Or Fryers (AREA)
  • Temperature-Responsive Valves (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Resistance Heating (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Control Of Resistance Heating (AREA)

Claims (6)

1. Dispositif de sécurité commandé thermiquement pour des chaudières (10) chauffées avec des combustibles solides dans des installations de chauffage fermées, dans lequel, en cas de température supérieure dans l'installation de chauffage de l'eau fraîche et froide de la conduite d'alimentation est introduite dans le système de l'installation de chauffage et de l'eau chaude de chauffage est écoulée dans une décharge (44), comportant
un tuyau d'amenée d'eau fraîche (20) qui est conduit au système de l'installation de chauffage et relié à la conduite d'alimentation, et dans lequel sont disposés en série un détendeur (22), une soupape (34) commandée par la température et un séparateur de tube (24), et
une conduite de décharge (42) reliée au système de l'installation de chauffage, dans laquelle est disposé un dispositif de sécurité de décharge (38), le dispositif de sécurité de décharge (38) thermique étant commandé par la même sonde de température (36), à laquelle est appliquée la température de l'eau de chauffage, que la soupape (34) commandée par la température, et s'ouvrant à une température légèrement plus élevée que cette soupape, caractérisé par le fait que
a) le séparateur de tube (24) présente un raccord de passage (30) de grande section et un raccord de commande (32) de petite section,
b) le raccord de passage (30) est relié directement à la sortie (66) du détendeur (22), et
c) le raccord de commande (32) également relié à la sortie (66) du détendeur est commandé par la soupape (34) commandée par la température sous forme de soupape à disque, qui est commandée par un poussoir de soupape (46) qui peut être déplacé longitudinalement par l'élément de commande (40) de la sonde de température (36), et qui commande également la tête de soupape (104) du dispositif de sécurité de décharge (38) thermique.
2. Dispositif de sécurité commandé thermiquement selon la revendication 1, caractérisé par le fait que
a) le long du poussoir de soupape (46) est formé un passage (124) qui communique avec le raccord (100) du dispositif de sécurité de décharge (38) thermique du côté de la sortie, et
b) sur le poussoir de soupape (46) est placée une deuxième soupape (120, 122) qui se ferme après que la soupape (34) du raccord de commande (32) s'ouvre.
3. Dispositif de sécurité commandé thermiquement selon la revendication 2, caractérisé par le fait
a) que le poussoir de soupape (46) est composé de deux sections (46a, 46b) guidées de manière déplaçable l'une contre l'autre, et
b) qu'un ressort (128) mis sous tension préalable est disposé entre les sections (46a, 46b), une section (46a) s'appliquant à une butée (129) de l'autre section (46b) sous l'action du ressort (128).
4. Dispositif de sécurité commandé thermiquement selon la revendication 3, caractérisé par le fait que
a) le raccord de commande (32) du séparateur de tube (24) se branche entre les soupapes (34; 120,122),
b) le détendeur (22) avec sa soupape détendante (60) est disposé coaxialement au poussoir de soupape (46) et aux soupapes (34; 120, 122), et
c) la soupape détendante (60) à l'état complètement ouvert ferme la soupape (34) commandant le raccord de commande (32) et ouvre la deuxième soupape (120,122).
5. Dispositif de sécurité commandé thermiquement selon la revendication 4, caractérisé par le fait que
a) le séparateur de tube (24) présente un boîtier (70) cylindrique, sur lequel le raccord de passage (30) du côté de l'entrée et un raccord de sortie (28) sont prévus sur des fronts opposés,
b) le boîtier (70) est muni d'une sortie (76) dans sa section inférieure,
c) dans le raccord de passage (30) est situé un manchon d'entrée (78) qui à son extrémité opposée au raccord de passage (30) est fermé sur le front, et qui présente des ouvertures de sortie (80) latérales,
d) sur le manchon d'entrée (78) un piston annulaire (82), guidé dans le boîtier (70) et ayant un manche (84) en forme de manchon qui entoure de manière étanche le manchon d'entrée (78), est mobile de manière glissante,
e) le raccord de commande (32) débouche dans l'espacement annulaire (86) entre le boîtier (70) et le piston annulaire (82),
f) le raccord de sortie (28) est entouré d'une tubulure (90) munie d'une garniture intérieure (88) et s'étendant dans le boîtier (70), dans laquelle le manche (84) en forme de manchon du piston annulaire (82) peut être introduit de manière étanche lors d'une course de travail de celui-ci,
g) le manche (84) présente sur sa paroi intérieure une contre-dépouille (92), par l'intermédiaire de laquelle une communication, entre les ouvertures de sortie (80) latérales du manchon d'entrée (78) et l'alésage du manche (84) communiquant avec le raccord de sortie (28), est créée après que le manche (84) a été introduit dans la tubulure (90).
6. Dispositif de sécurité commandé thermiquement selon la revendication 5, caractérisé par le fait qu'un empêcheur de refluement (26) est relié au raccord de sortie (28).
EP81103711A 1980-05-31 1981-05-14 Dispositif de sécurité commandé thermiquement pour chaudière de chauffage dans des installations de chauffage à circuit hydraulique fermé Expired EP0041163B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103711T ATE8814T1 (de) 1980-05-31 1981-05-14 Thermisch gesteuerte sicherheitseinrichtung fuer kessel in geschlossenen heizungsanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3020797 1980-05-31
DE19803020797 DE3020797A1 (de) 1980-05-31 1980-05-31 Thermisch gesteuerte sicherheitseinrichtung fuer kessel in geschlossenen heizungsanlagen

Publications (3)

Publication Number Publication Date
EP0041163A2 EP0041163A2 (fr) 1981-12-09
EP0041163A3 EP0041163A3 (en) 1982-01-20
EP0041163B1 true EP0041163B1 (fr) 1984-08-01

Family

ID=6103720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103711A Expired EP0041163B1 (fr) 1980-05-31 1981-05-14 Dispositif de sécurité commandé thermiquement pour chaudière de chauffage dans des installations de chauffage à circuit hydraulique fermé

Country Status (5)

Country Link
EP (1) EP0041163B1 (fr)
AT (1) ATE8814T1 (fr)
DE (2) DE3020797A1 (fr)
DK (1) DK228881A (fr)
NO (1) NO151384C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435127A1 (de) * 1984-09-25 1986-04-03 Hans Sasserath & Co Kg, 4052 Korschenbroich Fuelleinrichtung zur fuellung von geschlossenen anlagen
GB201120998D0 (en) * 2011-02-22 2012-01-18 Sasserath & Co Kg H Assembly for controlling the temperature of drinking water heater

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7401779U (de) * 1974-09-12 Stadler J Kg Vorrichtung zur thermischen Absicherung für Heizkessel mit oder ohne temperaturgesteuertem Brauchwassererwärmer in geschlossenen Wasserheizungsanlagen
DE1600977B2 (de) * 1967-06-08 1973-10-11 Davy-Ashmore Ag, 6000 Frankfurt Beheizbare Ventilbattene
DE6927453U (de) * 1969-07-10 1969-10-30 Guenter Verleger Vorrichtung fuer warmwasser-zentralheizungen.
DE2713155A1 (de) * 1977-03-25 1978-10-05 Krupp Gmbh Temperaturgesteuerte vorrichtung im kreislauf einer heizanlage, die das aufheizen des kessels ueber eine oberste grenztemperatur verhindert

Also Published As

Publication number Publication date
DK228881A (da) 1981-12-01
NO811815L (no) 1981-12-01
EP0041163A3 (en) 1982-01-20
EP0041163A2 (fr) 1981-12-09
NO151384C (no) 1985-03-27
DE3020797A1 (de) 1981-12-17
ATE8814T1 (de) 1984-08-15
DE3165205D1 (en) 1984-09-06
NO151384B (no) 1984-12-17

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