EP1132689A1 - Wärmetauscher und Füllteil dazu - Google Patents

Wärmetauscher und Füllteil dazu Download PDF

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Publication number
EP1132689A1
EP1132689A1 EP01200126A EP01200126A EP1132689A1 EP 1132689 A1 EP1132689 A1 EP 1132689A1 EP 01200126 A EP01200126 A EP 01200126A EP 01200126 A EP01200126 A EP 01200126A EP 1132689 A1 EP1132689 A1 EP 1132689A1
Authority
EP
European Patent Office
Prior art keywords
opening
heat exchanger
filling
heating
overflow
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.)
Withdrawn
Application number
EP01200126A
Other languages
English (en)
French (fr)
Inventor
Richard Petrus Cornelis In T' Groen
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.)
ZONNE-ENERGIE NEDERLAND BV
Original Assignee
ZONNE-ENERGIE NEDERLAND BV
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 ZONNE-ENERGIE NEDERLAND BV filed Critical ZONNE-ENERGIE NEDERLAND BV
Publication of EP1132689A1 publication Critical patent/EP1132689A1/de
Withdrawn legal-status Critical Current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
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1083—Filling valves or arrangements for filling
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system

Definitions

  • the invention relates to a heat exchanger, provided with a collecting tank for a heating liquid, with at least one inlet opening and at least one outlet opening, means for bringing the heating liquid into heat-exchanging contact with a medium for heating, and at least one overflow opening for discharging an excess of heating liquid.
  • a heat exchanger is known and is applied for instance in a system for heating tap water or a central heating system on the basis of solar energy.
  • a heating liquid generally water
  • a closed circuit comprising one or more solar collectors and one or more heat exchangers.
  • the medium for heating generally tap water or water of a central heating system.
  • the system further comprises a storage tank, in which a store of water is retained to ensure that water will be present in the closed circuit under all circumstances.
  • an overflow opening through which excess water, for instance during filling of the system, or air inevitably present in the case of excessive expansion of the system can flow away.
  • the circuit generally has a venting opening or pressure relief valve, whereby an excess pressure of the air in the system can be blown off.
  • the overflow opening and venting opening are generally arranged in a part of the circuit outside the storage tank and the heat exchanger, which will usually be embodied as an integral unit.
  • the part of the circuit or the conduit in which the overflow opening and venting opening or pressure relief valve are arranged is widened relative to the rest of the circuit so as to be able to accommodate the necessary connections.
  • This part of the circuit forms a relatively expensive part of the whole installation.
  • Also generally arranged in this wider part of the pipe is a filling opening, onto which a pipe for filling the system can be connected.
  • the known system herein has the drawback that the degree of filling of the widened part of the pipe in which the filling opening and the overflow opening are situated is not a particularly accurate measure for the degree of filling of the system as a whole.
  • the known system has the drawback that there is a possibility of the system being filled too far or under pressure if the overflow opening is closed, whether or not intentionally, during filling.
  • the invention therefore has for its object to provide a heat exchanger of the above described type, wherein these drawbacks do not occur.
  • the overflow opening preferably forms the mouth of an overflow tube protruding through a wall of the tank.
  • the location of the overflow opening in the tank can hereby be varied in simple manner by adjusting the extent to which the tube is inserted in the tank.
  • the overflow tube advantageously protrudes through the outlet opening. The number of costly operations on the tank is thus reduced as much as possible.
  • annular outlet opening is herein obtained, thereby reducing the risk of swirl formation in the storage tank, and therewith the risk of air being drawn in from the storage tank.
  • the overflow tube When the outlet opening debouches into a liquid pipe in which at least one filling opening is arranged, the overflow tube preferably debouches in the vicinity of the filling opening.
  • the heat exchanger herein has a member covering the filling opening and the mouth of the overflow tube. Such a cover member ensures that when the filling opening is left clear the overflow opening is also left clear, whereby overfilling or filling of the system under pressure is avoided.
  • An overpressure safety device is preferably arranged in the cover member. Integration of this safety device in the overflow system ensures that only air is blown off. This in contrast to earlier overpressure safety devices, which were often placed lower than the overflow opening and therefore also blew off water.
  • the heat exchanger is further provided with at least one pump with a suction side and a delivery side which is connected to the liquid pipes, at least the delivery side of the pump is preferably directed substantially upward.
  • a self-venting arrangement of the pump is hereby obtained, which is possible because a widened part of the pipe no longer has to connect onto the delivery side of the pump, this in contrast to the situation in older heat exchangers.
  • the invention also relates to a filling part for a heat exchanger of the above described type.
  • a filling part comprises a body for connecting to the liquid pipe, in which body are arranged at least one filling opening and at least one discharge opening formed in the vicinity thereof.
  • the filling part preferably has a member covering the filling opening and the discharge opening.
  • An overpressure safety device is advantageously arranged in the cover member.
  • the filling part is preferably further provided with a closing valve which is arranged in the filling opening and with which this latter can be closed in liquid-tight manner until the moment a filling hose is connected thereto.
  • This closing valve can be a ball valve, a spring-loaded valve or a rotatable closing disc.
  • the invention also relates to a system for heating a liquid, comprising a heating source and at least one heat exchanger as described above connected in a closed circuit to the heating source.
  • the heating source herein preferably comprises at least one solar collector.
  • a system 1 for heating a medium for instance water for a central heating installation or tap water, comprises a heat exchanger 2, in which the medium for heating is brought into heat-transferring contact with a heating liquid 3 (fig. 1).
  • This heat exchanger 2 is connected in a closed circuit 4 to a heating source, in the shown embodiment a solar collector 5.
  • This system 1 further comprises two pipes 9,11 connected to the heat exchanger for feeding and draining the medium for heating.
  • the heat exchanger 2 takes the form of a tank which is divided by a bottom partition 43 into an exchanger space 6 and a storage space 7.
  • a spiral-shaped conduit 8 which forms part of closed circuit 4 and through which the heating liquid flows, which liquid is thus in heat-exchanging contact with the liquid for heating in the exchanger space 6 for a relatively long time.
  • the spiral-shaped conduit 8 debouches via an opening 13 in bottom partition 43 in the storage space 7.
  • the liquid for heating is carried into the tank by a feed pipe 9 with a feed opening 10, and leaves the tank via an outlet opening 12 on the upper side of discharge pipe 11.
  • a supply of heating liquid 3 is retained such that there is a guarantee that liquid always circulates through the system.
  • the heating liquid 3 is drawn through an outlet opening 14 in the bottom 15 and through a liquid pipe 16 which communicates with the suction side 18 of pump 17.
  • the delivery side 19 of this pump 17, which is directed upward so as to ensure a good venting, is in turn connected to a pressure conduit 20, whereby the heating liquid is carried to solar collector(s) 5.
  • Pump 17 herein produces a power such that the heating liquid is carried upward in solar collector 5 as far as an outlet opening 44 thereof, whereafter this liquid flows back through a conduit 45 to heat exchanger 2.
  • the heating system must be prevented from being filled further than a desired level.
  • the ratio between the quantity of heating liquid 3 and the quantity of air in system 1 would thereby become too high.
  • the air in system 1 has the function of absorbing, by means of compression, the expansion of the heating liquid 3 resulting from differences in temperature, which can amount to several percent, too small a quantity of air could result in too high a liquid level in the whole system 1.
  • Heating liquid 3 could hereby come to a standstill in the conduits 20,45 going to and from collector 5, and in extreme cases even in the collector 5 itself, where the liquid would be exposed to the danger of freezing.
  • An overflow opening 21 is therefore present through which an excess of heating liquid 3 can be drained from system 1.
  • This overflow opening 21 is arranged according to the invention in collecting space 7 of the heat exchanger 2 itself, instead of outside it as was usual in such systems. Overflow opening 21 thus forms an accurate measure for the quantity of liquid in system 1.
  • the overflow opening 21 is the mouth of an overflow tube 22 which protrudes into the collecting space 7 of the tank.
  • Overflow tube 22 is herein arranged in outlet opening 14, which must anyway always be present in the wall of the tank, so that no additional adaptations of the tank are required.
  • the overflow tube 22 is even arranged concentrically in outlet opening 14, whereby outlet opening 14 in fact becomes annular, which has the added advantage of thereby preventing swirl formation in collecting space 7, and therewith the risk of air being drawn into pipes 16, 20.
  • a filling opening 28 through which the system 1 can be replenished.
  • the overflow tube 22 debouches in the vicinity of this filling opening 28. This enables covering of filling opening 28 and mouth 27 of overflow tube 22 with a single cover member 30, which is fixed in the shown embodiment by means of a screw 31 and which must be removed before the system 1 can be replenished.
  • this cover member 30 is removed, not only is filling opening 28 left clear but also the mouth 27 of overflow tube 22, thereby avoiding the risk of system 1 being filled while overflow opening 21 is still closed.
  • the mouth 27 of overflow tube 22 and the filling opening 28 form part of a separate filling part 23, which is mounted on the underside of liquid pipe 16 (fig. 3).
  • This filling part 23 comprises a housing 24 in the form of a kneebend, with connecting pieces 25 and 26 for the connection to respectively pump 17 and discharge pipe 16.
  • Pump 17 is herein fixed to connecting piece 25 by means of a threaded ring 33 with interposing of a gasket 34, while to fix the filling part 23 to discharge pipe 16 use is made of a squeeze coupling, consisting of a threaded part 35 and a deformable clamping ring 36.
  • Cover member 30 is fixed onto filling part 23 via a gasket 38.
  • a closing valve 29 Arranged in filling opening 28 is a closing valve 29, in the shown embodiment a ball valve.
  • This ball-valve is provided on the top with an operating part 39 which co-acts with an operating recess 37 in cover member 30.
  • the cover member 30 When released from filling part 23, the cover member 30 can thus be used to rotate ball valve 29 such that a passage opening 40 arranged therein comes wholly or partially into register with filling opening 28.
  • Ball valve 29 is of course only opened after a coupling piece 42 of a filling hose 46 has been connected, for instance by screws, to a connecting piece 41 in filling opening 28.
  • heating liquid 3 usually water
  • water is thus injected through the filling hose 46 in filling opening 28 into filling part 23, and will flow upward therein around the overflow tube 22 and flow through pipe 16 via outlet opening 14 into collecting space 7 of heat exchanger 2.
  • this collecting space is filled to an extent such that the water reaches the overflow opening 21, it begins to flow away through overflow tube 22, which debouches in the bottom of filling part 23, so that the water runs away through outlet opening 27.
  • cover member 30 can be put in place again.
  • Cover member 30 is further provided with a connection 32 for an overpressure safety device 47, whereby in the case of excess pressure air can be blown off through overflow tube 22 and outlet opening 27 via the overpressure safety device 47.
  • this overpressure safety device 47 is connected to overflow tube 22, the mouth of which will normally be located above the liquid level in collecting space 7, it is indeed only air which is blown off in the overpressure safety device, and it will not be accompanied by water, as was the case in conventional systems.
  • a spring-loaded valve 129 can also be used as closing valve (fig. 4).
  • This valve 129 can comprise a pin-like part 152 which is received in a guide member 153 in filling opening 128.
  • the pin-like part 152 is herein connected to a dish-like or otherwise shaped pressure part 150, which is in contact with a compression spring 151 in filling opening 128.
  • This closing valve 129 is therefore opened by pressing thereagainst a suitably formed filling nozzle of a filling hose (not shown here), whereby the closing valve 129 is pressed inward counter to the force of spring 151 and thus leaves clear a passage opening 140.
  • This variant is therefore simpler to operate than the first embodiment, since opening of closing valve 129 takes place automatically when the filling hose is coupled.
  • the closing valve 229 is embodied as a rotatable disc, which can rotate around a central pin 251 (fig. 5).
  • the surface 252 of the disc is herein rotated through 90° in the plane of the drawing in order to show clearly the peripheral form thereof.
  • a first opening 240 Arranged in the disc is a first opening 240, the cross-section of which corresponds with the filling opening 228, as well as a second slot-like opening 250 which runs in peripheral direction.
  • Gaskets 253 are arranged between the disc-like closing valve 229 and the housing 224 of filling part 223. In the shown position the installation can be filled by connecting a filling hose onto filling opening 240.
  • the opening 240 can be taken out of register with opening 228 by rotating the disc-like closing valve 229, whereby opening 228 is covered by the disc-like body 229.
  • the opening 250 will herein still remain in register with outlet opening 227, whereby an excess of water or air under pressure can still escape from the system.
  • the overflow tube could for instance protrude at a different position into collecting tank 7, while in addition other forms of overflow tube or overflow opening can also be envisaged.
  • the annular outlet opening could also be realized in a different manner, without using the overflow tube for this purpose and, while retaining the advantages associated therewith, it could also be used in other heat exchangers.
  • the pump with vertically directed outlet opening on the delivery side, whereby an automatic venting is obtained, could, with the same advantages, also be applied in combination with another heat exchanger.
  • the filling opening and the mouth of the overflow tube could also be arranged in an existing pipe.

Landscapes

  • 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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP01200126A 2000-01-17 2001-01-15 Wärmetauscher und Füllteil dazu Withdrawn EP1132689A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1014093A NL1014093C2 (nl) 2000-01-17 2000-01-17 Warmtewisselaar en daarbij toe te passen vuldeel.
NL1014093 2000-01-17

Publications (1)

Publication Number Publication Date
EP1132689A1 true EP1132689A1 (de) 2001-09-12

Family

ID=19770608

Family Applications (1)

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EP01200126A Withdrawn EP1132689A1 (de) 2000-01-17 2001-01-15 Wärmetauscher und Füllteil dazu

Country Status (2)

Country Link
EP (1) EP1132689A1 (de)
NL (1) NL1014093C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022849A (zh) * 2011-01-14 2011-04-20 济南优百科塑料有限公司 太阳能水箱用一体式上水溢水装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH113689A (de) * 1925-05-15 1926-02-01 Stanislas Gumny Füllungs-Kontrollstück bei Warmwasserheizungsanlagen.
US4309982A (en) * 1978-04-11 1982-01-12 Pechiney Ugine Kuhlmann Process and apparatus for the preparation of hot water from solar energy
NL8102798A (nl) * 1981-06-10 1983-01-03 Eurometaal Nv Warmteaccumulator met expansievat.
EP0616174A1 (de) * 1993-03-17 1994-09-21 Agpo B.V. Vorrichtung zum Speichen von Solarenergie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH113689A (de) * 1925-05-15 1926-02-01 Stanislas Gumny Füllungs-Kontrollstück bei Warmwasserheizungsanlagen.
US4309982A (en) * 1978-04-11 1982-01-12 Pechiney Ugine Kuhlmann Process and apparatus for the preparation of hot water from solar energy
NL8102798A (nl) * 1981-06-10 1983-01-03 Eurometaal Nv Warmteaccumulator met expansievat.
EP0616174A1 (de) * 1993-03-17 1994-09-21 Agpo B.V. Vorrichtung zum Speichen von Solarenergie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022849A (zh) * 2011-01-14 2011-04-20 济南优百科塑料有限公司 太阳能水箱用一体式上水溢水装置

Also Published As

Publication number Publication date
NL1014093C2 (nl) 2001-07-18

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