EP2397777B1 - Gehäuseeinheit für eine Heizungsanlage - Google Patents

Gehäuseeinheit für eine Heizungsanlage Download PDF

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Publication number
EP2397777B1
EP2397777B1 EP10006395.7A EP10006395A EP2397777B1 EP 2397777 B1 EP2397777 B1 EP 2397777B1 EP 10006395 A EP10006395 A EP 10006395A EP 2397777 B1 EP2397777 B1 EP 2397777B1
Authority
EP
European Patent Office
Prior art keywords
housing unit
heat exchanger
valve
heating
plate heat
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.)
Active
Application number
EP10006395.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2397777A1 (de
Inventor
Lars Hannibalsen
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.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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 Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP10006395.7A priority Critical patent/EP2397777B1/de
Priority to US13/161,545 priority patent/US9612036B2/en
Priority to CN201110170445.0A priority patent/CN102287904B/zh
Publication of EP2397777A1 publication Critical patent/EP2397777A1/de
Application granted granted Critical
Publication of EP2397777B1 publication Critical patent/EP2397777B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/142—Connecting hydraulic components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0016—Control, e.g. regulation, of pumps, pumping installations or systems by using valves mixing-reversing- or deviation valves
    • 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
    • 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
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • 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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/142—Connecting hydraulic components
    • F24H9/144—Valve seats, piping and heat exchanger connections integrated into a one-piece hydraulic unit

Definitions

  • the invention relates to a housing unit for a heater, according to the preamble of claim 1.
  • a housing unit is for example from the EP 0 874 201 A2 known.
  • the housing units for pure space heating systems differ significantly from those for heating systems with two heating circuits, one of which is intended for space heating and one for domestic water heating.
  • the latter have in addition to the always present at least one circulation pump, a heat exchanger, typically a plate heat exchanger and a changeover valve or another circulating pump.
  • a heat exchanger typically a plate heat exchanger
  • a changeover valve or another circulating pump In the types that work with switching valve, there are again two variants, namely with reversing valve in the flow or with reversing valve in the return.
  • a housing unit of the latter type is made, for example EP 0 918 197 B1 known.
  • a switching valve is arranged in the suction chamber of the pump, wherein the valve body closes depending on the switching position, the return line of the space heater or the return line from the plate heat exchanger and releases.
  • the valve body is seated in a mounting position about vertically arranged lever whose other end is led out of the housing sealingly down where this is driven by means of an electric servomotor, which is mounted from the outside of the housing.
  • a disadvantage of the housing unit described therein is that the two line ends, which are closed or released from the valve body, are formed by separate injection molded parts, which must be incorporated into this after the actual housing in this, resulting in additional installation effort and because of the additional Components also means additional tooling.
  • a further disadvantage is that the arrangement of the electric motor on the underside of the housing unit obstructs the natural course of the pipe, in particular because the return pipe for space heating is to be bypassed. Therefore, the housing unit described there has the disadvantage that it has relatively complex lines on the suction side and the plate heat exchanger can only laterally offset behind it can be arranged, which precludes a compact design. Also, a complex and separately produced connection component is to be provided by the channel guide formed within the assembly to the plate heat exchanger, which means further tooling.
  • the invention has the object, a housing unit of a heater for a heating system with two heating circuits and a suction side of the pump arranged switching valve, ie to provide a switching valve in the return lines, which are simple in construction, inexpensive to produce and variable.
  • the housing unit of a heater for a heating system with two heating circuits, one for the space heating and one for the domestic water heating forms a pump housing for a circulation pump and comprises a suction side of the pump arranged valve for switching the heating circuits.
  • the housing unit In the installation position on the back, the housing unit has at least one connection for the direct connection of a plate heat exchanger for hot water heating. Furthermore, the housing unit has on one side an opening for the return of the space heater.
  • the suction chamber formed within the housing unit, to which the suction mouth of the pump connects, has two channels opening into these, of which either one or the other is closed by a valve body of the valve and of which a channel to the line connection for the return of the Space heating and the other channel leads to a connection of the return of the plate heat exchanger.
  • the housing unit according to the invention can advantageously be connected directly to a plate heat exchanger connected in the installation position with at least one connection. Since the plate heat exchanger in practice is a comparatively solid and made of metal component, this is not only a hydraulic but also a mechanical connection, which also mechanically determines the housing unit within the heater. It can be omitted due to the design with suitable channel arrangement and design to be incorporated in within the housing unit in the suction chamber pipe sections, a production of the housing unit without lost cores is possible.
  • the structure of the housing unit allows a tool which has only drawing and / or pivoting cores, or comparable reversible cores, which is known to be particularly favorable for mass production.
  • the housing unit advantageously has two connections which are arranged one above the other in the installed position and which are arranged and designed such that they are suitable and intended for direct connection to one of the two connection pairs of the plate heat exchanger.
  • a rear piping of the housing unit can be completely eliminated, by the two connections immediately adjacent to the plate heat exchanger not only a compact construction but also a good mechanical support of the components involved is ensured.
  • the housing unit according to the invention is versatile, since it can be connected optionally to the right or the left connection pair of the plate heat exchanger. It can therefore be supplied with a housing unit heaters of different design.
  • the housing unit is provided with an opening for the return of the space heating on the underside.
  • This opening which is advantageously larger than a conventional line connection, can be used to Auskemen part of the inner of the housing unit, wherein for subsequent connection of the return line, a corresponding line connection formed there, for example, by a corresponding metal part or plastic part is incorporated there.
  • the four water-carrying connecting lines typically come from below in such heaters, in particular wall-mounted heaters.
  • the channels formed in the housing unit in the suction chamber are advantageously formed by protruding into this pipe sections, which are arranged and aligned so that they end in alignment and at a distance there. Between these ends can then be arranged in a conventional manner arranged at the end of a lever arm valve body, with which either one or the other channel can be closed or released.
  • valve body is arranged at the end of a lever, which is arranged horizontally in the installation position and laterally, preferably left side sealing out through a housing wall to the outside, the other end coupled with a there attaches to the housing unit from the outside servomotor is.
  • a laterally mounted servomotor is easily accessible and therefore in operation, that is in the installed position, interchangeable with a few simple steps.
  • the housing unit is formed so that the suction chamber an air separation housing connects, which is part of the housing unit.
  • an air separation housing can thus typically be formed integrally with the structural unit and is located in the region in front of the suction mouth, ie where the flow is calmed the most and therefore a gas separation is most effective.
  • Heaters of the type in question typically have a closed by a pressure relief valve bypass between the heating flow and return heater to ensure that even when closed in space heating all thermostatic valves are, the circulation function is ensured within the heater and thus a heat dissipation from the primary heat exchanger.
  • the housing unit is designed so that the bypass opens into the suction chamber of the pump, wherein the pressure relief valve is incorporated into the housing unit suction chamber side. Characterized in that the pressure relief valve is incorporated into the housing unit suction chamber side, with a suitable design of the housing unit casings for the bypass can be largely eliminated, it is sufficient a corresponding line connection for the bypass to the housing unit.
  • bypass extends at least partially through the heat exchanger supplying the plate heat exchanger, the channel in the housing unit, which leads back to the one port of the plate heat exchanger , also part of the bypass.
  • the housing unit according to the invention according to a development of the invention, a channel that leads from the plate heat exchanger to the valve for switching the heating circuits, which has a branch for the bypass, by the pressure relief valve in the normal Operation is closed and opens in the suction chamber. This diversion is required so that even when closed by the valve return line of the heat exchanger, the bypass function is ensured.
  • the bypass is formed by a bypass duct which opens outwardly at the top in the housing unit and which cuts the channel leading from the heat exchanger to the valve for switching over the heating circuits and is conductively connected to the suction space by a wall recess.
  • This embodiment is structurally particularly favorable, since such outwardly opening channels can be produced in tool injection molded plastic parts without lost cores.
  • the arrangement has the advantage of short lines. The bypass is thus almost realized by the shortest route, at the same time the housing unit serves to receive the pressure relief valve, which closes the bypass at normal pressure conditions.
  • the arranged in the bypass pressure relief valve is advantageously used in the manner of a cartridge from the outside into the bypass channel and releasably secured there. In this way, the pressure relief valve can be checked for maintenance purposes and optionally replaced quickly, without the need for disassembly of lines or line connections.
  • the return of the plate heat exchanger is formed by the lower port, which is connected via the other channel with the suction chamber and the valve disposed therein within the housing unit.
  • the upper terminal of this connection pair can be formed by a preferably bent by about 90 ° and in the installed position preferably to the left directed duct, the Part of the housing unit is, however, is arranged with respect to the suction chamber outside the housing unit.
  • Such a duct is low tooling feasible and also leads the upper line connection of the plate heat exchanger in an easily accessible area of the heater, where the line connection with the service water pipe can be made.
  • the housing unit is formed by a one-piece injection molded plastic component which is produced without lost cores.
  • Fig. 1 shown heating system has two heating circuits, one for space heating and one for domestic water heating.
  • the system consists of the actual heater, which can be designed as a wall-mounted gas heater or as a floor standing heater.
  • the device side part is in Fig. 1 formed by the part of the heating system shown above the broken line 0, the rest of the building-side part through the underlying.
  • the heater has in four at the bottom of the device exiting water line connections, namely a heating flow connection 1, a heating return connection 2, a cold water connection 3 and a hot water connection 4.
  • the other connections gas, electric
  • This heater thus serves on the one hand to supply heat exchangers 5, for example in the form of radiators, for space heating and for heating domestic water.
  • a plate heat exchanger 6 is provided, via which the coming of the cold water connection 3 cold service water is heated and directed to the hot water connection 4.
  • the heating takes place by the hot water generated in the heater in a primary heat exchanger 7, for example by combustion of gas, which is guided in the counterflow through the plate heat exchanger 6.
  • a circulating pump 8 For circulating the heat transfer medium, typically water, through the primary heat exchanger 7 and the secondary heat exchangers 5 and 6, a circulating pump 8 is provided in the form of a wet-running centrifugal pump.
  • This circulation pump 8 conveys the heat transfer medium via a pressure line 9 to the primary exchanger 7, where this is heated and fed either via a line 10 to the plate heat exchanger 6 or via a line 11 to the heating flow connection 1 and from there the heat exchangers 5 of the space heater.
  • the emerging from the heat exchangers 5 and 6 medium is fed via a return line 12, which leads the water coming from the heat exchanger 5, and via a return line 13, which leads the water coming from the heat exchanger 6, a changeover valve 14, which depending on the switching position either Return line 12 or the return line 13 to the suction side of the pump 8 connects.
  • the switching valve 14 is controlled by means of an electric motor such that in operation, the return line 12 is connected to the pump 8. If warm water is to be taken off at the hot water tapping point, this is detected by means of a flow sensor 16 and the valve 14 is actuated in a switching manner by means of the electric motor so that the return line 13 is connected to the suction side of the pump 8.
  • the heater on a bypass line 17 which ensures that even when closing both heating circuits circulation within the heater is possible.
  • a pressure relief valve 18 incorporated in the bypass line which opens from a preset differential pressure.
  • the heater to other components of which only an example here a compensating vessel 19, a safety valve 20 and a filling valve 21 are shown.
  • a housing unit 22 is provided, which is formed as a one-piece plastic injection molded part.
  • the housing unit 22 also includes the in Fig. 1 22a, namely a pipe bend 41 for internal piping of the appliance-side cold water connection with the cold water connection of the housing unit 22.
  • the housing unit 22 also has the rear upper connection 42 for the plate heat exchanger 6 and the flow meter 16.
  • This housing unit 22 forms at its front in the installed position a pump housing 23 and the associated flange for a pump head 24 in a conventional manner consisting of electric motor, terminal box with optionally built-in electronics and sitting at the free end of the motor shaft impeller.
  • This pump head 24 is attached to the front end of the housing unit 22 by incorporating an annular cover disk 25 in such a way that the rotary impeller is arranged in the region of the pump housing 23.
  • the central recess of the cover plate 25 forms the suction mouth 26 of the pump.
  • the suction mouth 26 opens into a within the Housing unit 22 centrally formed suction chamber 28, which also forms a housing for the switching valve 14.
  • the suction chamber 28 has a substantially cylindrical shape and has an opening 29 in its mounting position on the underside, which is provided for Engliedern a connection part 30, which serves to connect a leading to the heater return connection return line 12.
  • This connection part 30, which preferably consists of metal, is sealingly incorporated into the opening 29 by means of an O-ring and fixed in a form-fitting manner by means of a U-shaped bracket.
  • the upper end 31 of the connecting part 30 simultaneously forms a valve seat within the suction chamber 28.
  • This valve seat is, for example, in Fig. 6 shown within the suction chamber.
  • the associated valve body 32 is formed by a substantially cylindrical flat body which sits at the end of a lever 33 which is sealingly passed through an opening on the left side of the housing unit through the wall of the suction chamber 28, and the other end 34 of a mounted on the outside of the housing unit mounted electric motor drive unit 35.
  • the lever 33 is pivotally held in a bearing 36 and sealed with respect to this, which incorporated in the stepped and end towards the flange-shaped opening 37 of the housing unit 22 and fixed by the subsequently incorporated motor bracket 38.
  • valve seat 31 opposite valve seat, which is alternatively closed by the valve body 32.
  • This pipe bend 39 which is formed integrally with the housing unit 22, opens into the lower rear-side connection 40 in the installation position, with which the housing unit is connected to the lower right-hand connection in the installed position the plate heat exchanger 6 is connected.
  • This pipe bend 30, since it is accessible both from the rear in the installation position to the rear opening and through the lower opening 29 in the housing unit and the pump side from the front, in the production with a Tool to be manufactured with drawing heads and without lost cores.
  • the housing unit has an outside of the suction chamber 28, that is on the outside of the housing unit 22, integrally formed pipe bend 41, which forms the upper connection 42 for the heat exchanger and which is designed to connect the cold water supply 3 leading cold water line.
  • a corresponding line connection 43 is, for example, in Fig. 6 visible, noticeable.
  • This pipe bend 41 may also be formed as a separate component independently of the housing unit. Even with one-piece design with the housing unit of this elbow 41 may be made of other material, which is materially adapted to the temperature level and composition of the flowing medium.
  • a Heilabscheidegeper 44 in which a breather valve 45 is inserted bayonet-like.
  • the Heilabscheidegepatuse 44 which extends substantially as far as the actual, the suction chamber 28 forming housing upwardly this is cylindrical and seen from above right next to the pipe bend 41 to the rear wall of the suction chamber 28 subsequently formed in the housing unit (see Fig. 4 ).
  • a rear port 46 is provided, which opens into the suction chamber 28.
  • two ports 47 and 48 opening laterally into the suction chamber 28 are provided on the right side in the installed position.
  • the expansion tank 19 sensors or others suitable hydraulic connections are connected, which are to be hydraulically connected to the suction chamber 28.
  • the back of the suction chamber 28 is followed by a channel 49 directed downwards by 90 °, which is arranged at the bottom of the suction chamber 28 and is closed off by a sealing plug 50. After removal of the sealing plug 50, the housing unit can be almost completely emptied via this channel.
  • This channel 51 which is open to the outside, opens into the suction chamber 28 and cuts the line 13 within the housing unit 22, wherein the free end of this channel 51 is provided with a bayonet, so that a cartridge 52 in the free end of the channel 51 can be inserted and There is lockable.
  • This cartridge 52 comprises a pressure limiting valve 18, namely the valve 18, and is arranged in the installed position so that the valve 18 is arranged between the conduit 13 and the suction chamber 28 of the pump.
  • the channel 51 thus forms on the one hand the end of scrubtauf Arthur 13, where it is designed as a valve seat end to be closed or opened by the valve body 32, on the other hand, this channel 51 also forms part of the bypass line 17, which Fig. 1 illustrated by the line 10, the heat exchanger 6 and the return line 13 is formed.
  • the channel 51 has a recess 53 in the wall to the suction chamber 28, approximately where the pressure relief valve 18 is incorporated in a cartridge-like manner.
  • This recess 53 forms the actual bypass, namely the connection to the suction chamber 28 when the pressure-limiting valve 18 is open.
  • This connection in conjunction with the pressure-limiting valve 18 thus ensures that the X channel 51 is closed at the end by the valve body 32 , a line connection is made to the suction chamber 28. Since the pressure relief valve 18 is accessible in the installed position from the outside through the free end of the channel 51. can be adjusted via this access in the installed state of the limiting pressure on the valve 18, provided that it is an adjustable valve.
  • the housing unit 22 is not mandatory as in the embodiment according to the Fig. 2 to 8 also include part 22a.
  • this part 22a of the housing unit 22 is formed as a separate injection-molded component, wherein in this component 22a in a connection opening from above the flow meter 16 is incorporated like a cartridge.
  • the housing unit described above is connected to the right terminal pair of the plate heat exchanger 6. However, it can also be connected to the left connection pair. It is understood that then the connection of the plate heat exchanger must also be done in the reverse manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
EP10006395.7A 2010-06-19 2010-06-19 Gehäuseeinheit für eine Heizungsanlage Active EP2397777B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10006395.7A EP2397777B1 (de) 2010-06-19 2010-06-19 Gehäuseeinheit für eine Heizungsanlage
US13/161,545 US9612036B2 (en) 2010-06-19 2011-06-16 Housing unit for a heating system
CN201110170445.0A CN102287904B (zh) 2010-06-19 2011-06-20 用于供热设备的壳体单元

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10006395.7A EP2397777B1 (de) 2010-06-19 2010-06-19 Gehäuseeinheit für eine Heizungsanlage

Publications (2)

Publication Number Publication Date
EP2397777A1 EP2397777A1 (de) 2011-12-21
EP2397777B1 true EP2397777B1 (de) 2016-08-03

Family

ID=42543256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10006395.7A Active EP2397777B1 (de) 2010-06-19 2010-06-19 Gehäuseeinheit für eine Heizungsanlage

Country Status (3)

Country Link
US (1) US9612036B2 (zh)
EP (1) EP2397777B1 (zh)
CN (1) CN102287904B (zh)

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EP3012553B1 (de) 2014-10-21 2018-01-17 Grundfos Holding A/S Baueinheit für eine Heizungsanlage

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3012553B1 (de) 2014-10-21 2018-01-17 Grundfos Holding A/S Baueinheit für eine Heizungsanlage

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CN102287904A (zh) 2011-12-21
US9612036B2 (en) 2017-04-04
CN102287904B (zh) 2015-08-26
EP2397777A1 (de) 2011-12-21
US20110308767A1 (en) 2011-12-22

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