EP2697570B1 - Hydraulic unit - Google Patents

Hydraulic unit Download PDF

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Publication number
EP2697570B1
EP2697570B1 EP12722856.7A EP12722856A EP2697570B1 EP 2697570 B1 EP2697570 B1 EP 2697570B1 EP 12722856 A EP12722856 A EP 12722856A EP 2697570 B1 EP2697570 B1 EP 2697570B1
Authority
EP
European Patent Office
Prior art keywords
inlet
heat exchanger
heating
pass conduit
water
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
EP12722856.7A
Other languages
German (de)
French (fr)
Other versions
EP2697570A1 (en
Inventor
Angelo Spisso
Luca Magnone
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.)
Elbi International SpA
Original Assignee
Elbi International SpA
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 Elbi International SpA filed Critical Elbi International SpA
Priority to RS20190809A priority Critical patent/RS59049B1/en
Priority to EP18197036.9A priority patent/EP3453978A3/en
Publication of EP2697570A1 publication Critical patent/EP2697570A1/en
Application granted granted Critical
Publication of EP2697570B1 publication Critical patent/EP2697570B1/en
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 heatersĀ 
    • 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
    • F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
    • 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
    • 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
    • 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
    • F24D3/105—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system pumps combined with multiple way valves
    • 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 heatersĀ 
    • F24H9/142—Connecting hydraulic components

Definitions

  • the present invention relates to a hydraulic pumping assembly for a boiler of an installation for heating and for generating domestic hot water, of the type defined in the preamble of the appended Claim 1.
  • EP 0 866 280 A2 discloses an installation for heating and for generating domestic hot water comprising a hydraulic pump and a three-way valve which are both coupled to a same connection adapter having two inlet pipe connections lying in a same plane and one outlet pipe connection lying in a second plane parallel to the first plane.
  • FIG. 1 of the appended drawings schematically illustrates such an installation including a boiler B of a known type, and a pumping unit indicated as a whole by A.
  • This unit A is connected between an inlet connector 20 and a primary heat exchanger 21 intended to heat a flow of water for use in a heating circuit comprising (for example) piping 22 which extends between an outlet connector 23 and the inlet connector 20, and along which one or more radiators 24 are interposed.
  • the boiler B further comprises a secondary heat exchanger 25, of the liquid/liquid type, for example a plate heat exchanger, for transferring heat from a water flow coming from the primary heat exchanger 21, and flowing in a pipe 26, to a flow of domestic water in piping 27 which extends between two connectors 28, 29 of the boiler.
  • the connector 28 is intended to be connected to a source of supply for the plumbing system, for example the mains supply, and the connector 29 can be connected to a tap 30 for supplying heated domestic water.
  • the pumping unit A comprises, in a known way, a body 1, made of moulded plastic material for example, having a first inlet 2 and an outlet 3, for connection to the connector 20 (and therefore to the return pipe of the heating circuit 22, 24) and to the inlet of the primary heat exchanger 21, respectively.
  • the body 1 also has two further inlets 4 and 5, connected, respectively, to the secondary heat exchanger 25 and to a by-pass conduit 31 in which a one-way valve 32 can be interposed.
  • This by-pass conduit extends essentially in parallel with the primary heat exchanger 21, between the outlet of the latter and the inlet 5 of the pumping unit A.
  • a circulation pump 7 and a three-way solenoid valve indicated as a whole by 8 are provided, in series with each other, between the outlet 3 and the inlet 2 of the body 1 of the pumping unit A.
  • This solenoid valve 8 has an inlet connected to the inlet connectors 2 and 5 of the body 1, and a further inlet connected to the inlet connector 4 of this body, and thus to the secondary heat exchanger 25.
  • FR 2 211 109 A2 discloses a hydraulic pumping unit comprising a body with an outlet and a first inlet, as well as an opening suitable for being used as an inlet. Between the outlet and the first inlet in said body there is provided a circulation pump and a three-way electric valve, hydraulically in series with one another, said three-way electrical valve being further connected to said opening. A by-pass conduit is provided between the first inlet and the opening.
  • One object of the present invention is to provide a hydraulic pumping assembly for a boiler of an installation for heating and for generating domestic hot water, which can overcome the aforementioned drawbacks of the prior art solutions.
  • a pumping unit A is primarily characterized in that the by-pass conduit 31 is also formed inside its body 1, and in that a one-way valve 32 can also be provided (if required) on the by-pass conduit and still inside the body 1.
  • the by-pass conduit 31 is substantially in series with the primary pipe 26 of the secondary heat exchanger 25.
  • the body 1 of the pumping unit A can have a smaller number of inlet connectors, since it is no longer necessary, in particular, to have the connector indicated by 5 in Figure 1 .
  • a further advantage of the solution according to the invention lies in the fact that the by-pass conduit 31 and the one-way valve 32, if present, are incorporated and pre-assembled in the pumping unit A. Consequently there is an appreciable reduction in the number of plumbing connections required for the assembly of the boiler B, and therefore a reduction in the risk of leakage.
  • the by-pass conduit 31 is formed in the body 1 between the second inlet 4 of this body and the inlet (pumping chamber) of the pump 7.
  • the inlet 4 of the body 1 is coupled to the primary side of the secondary heat exchanger 25, not in a direct manner, but through a length of pipe 26.
  • This arrangement can also be clearly seen in the detail shown in Figure 4 , where the inlet (pumping chamber) of the pump 7 is indicated by 33.

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)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Description

  • The present invention relates to a hydraulic pumping assembly for a boiler of an installation for heating and for generating domestic hot water, of the type defined in the preamble of the appended Claim 1.
  • EP 0 866 280 A2 discloses an installation for heating and for generating domestic hot water comprising a hydraulic pump and a three-way valve which are both coupled to a same connection adapter having two inlet pipe connections lying in a same plane and one outlet pipe connection lying in a second plane parallel to the first plane.
  • Figure 1 of the appended drawings schematically illustrates such an installation including a boiler B of a known type, and a pumping unit indicated as a whole by A. This unit A is connected between an inlet connector 20 and a primary heat exchanger 21 intended to heat a flow of water for use in a heating circuit comprising (for example) piping 22 which extends between an outlet connector 23 and the inlet connector 20, and along which one or more radiators 24 are interposed. The boiler B further comprises a secondary heat exchanger 25, of the liquid/liquid type, for example a plate heat exchanger, for transferring heat from a water flow coming from the primary heat exchanger 21, and flowing in a pipe 26, to a flow of domestic water in piping 27 which extends between two connectors 28, 29 of the boiler. The connector 28 is intended to be connected to a source of supply for the plumbing system, for example the mains supply, and the connector 29 can be connected to a tap 30 for supplying heated domestic water.
  • The pumping unit A comprises, in a known way, a body 1, made of moulded plastic material for example, having a first inlet 2 and an outlet 3, for connection to the connector 20 (and therefore to the return pipe of the heating circuit 22, 24) and to the inlet of the primary heat exchanger 21, respectively. The body 1 also has two further inlets 4 and 5, connected, respectively, to the secondary heat exchanger 25 and to a by-pass conduit 31 in which a one-way valve 32 can be interposed. This by-pass conduit extends essentially in parallel with the primary heat exchanger 21, between the outlet of the latter and the inlet 5 of the pumping unit A.
  • A circulation pump 7 and a three-way solenoid valve indicated as a whole by 8 are provided, in series with each other, between the outlet 3 and the inlet 2 of the body 1 of the pumping unit A. This solenoid valve 8 has an inlet connected to the inlet connectors 2 and 5 of the body 1, and a further inlet connected to the inlet connector 4 of this body, and thus to the secondary heat exchanger 25.
  • In the prior art solution shown in Figure 1, if the connectors 20 and 23 are both closed while the three-way solenoid valve 8 is in the "heating position" (in which it connects the inlet 2 to the pump 7, while it disconnects the inlet 4 from this pump), the circulation of the heating water inside the primary heat exchanger 21 continues to be provided through the by-pass conduit 31 and the one-way valve 32, if present, associated therewith. This provides effective protection of the primary heat exchanger 21.
  • However, the prior art solution described above has a number of drawbacks. In the first place, it requires the interconnection of a large number of components, using a considerable number of plumbing connections. It therefore gives rise to risks of leakage, and has excessive overall dimensions and cost.
  • FR 2 211 109 A2 discloses a hydraulic pumping unit comprising a body with an outlet and a first inlet, as well as an opening suitable for being used as an inlet. Between the outlet and the first inlet in said body there is provided a circulation pump and a three-way electric valve, hydraulically in series with one another, said three-way electrical valve being further connected to said opening. A by-pass conduit is provided between the first inlet and the opening.
  • One object of the present invention is to provide a hydraulic pumping assembly for a boiler of an installation for heating and for generating domestic hot water, which can overcome the aforementioned drawbacks of the prior art solutions.
  • This and other objects are achieved according to the invention with a hydraulic pumping assembly for an installation whose principal characteristics are defined in the appended Claim 1.
  • Further features and advantages of the invention will become clear from the following detailed description which is given, purely by way of non-limiting example, with reference to the appended drawings, in which:
    • Figure 1, described above, is a partial schematic illustration of an installation for heating and for generating domestic hot water, including a pumping unit according to the prior art;
    • Figure 2 is a perspective view of a pumping unit for an installation according to the present invention;
    • Figure 3 is a diagram similar to that of Figure 1, and represents in a schematic and partial way an installation for heating and for generating domestic hot water according to the present invention; and
    • Figure 4 is a partial perspective view, partially in a section taken along the line IV-IV of Figure 2.
  • In Figures 2 to 4, parts and elements described previously with respect to Figure 1 have been given the same alphabetic symbols and reference numerals as those used previously.
  • With reference to Figure 3 in particular, in an installation according to the invention a pumping unit A is primarily characterized in that the by-pass conduit 31 is also formed inside its body 1, and in that a one-way valve 32 can also be provided (if required) on the by-pass conduit and still inside the body 1. The by-pass conduit 31 is substantially in series with the primary pipe 26 of the secondary heat exchanger 25.
  • Because of this feature, the body 1 of the pumping unit A can have a smaller number of inlet connectors, since it is no longer necessary, in particular, to have the connector indicated by 5 in Figure 1. A further advantage of the solution according to the invention lies in the fact that the by-pass conduit 31 and the one-way valve 32, if present, are incorporated and pre-assembled in the pumping unit A. Consequently there is an appreciable reduction in the number of plumbing connections required for the assembly of the boiler B, and therefore a reduction in the risk of leakage.
  • The overall dimensions and cost are also substantially reduced.
  • As is apparent in the schematic illustration of Figure 3, the by-pass conduit 31 is formed in the body 1 between the second inlet 4 of this body and the inlet (pumping chamber) of the pump 7. The inlet 4 of the body 1 is coupled to the primary side of the secondary heat exchanger 25, not in a direct manner, but through a length of pipe 26. This arrangement can also be clearly seen in the detail shown in Figure 4, where the inlet (pumping chamber) of the pump 7 is indicated by 33.
  • It can be seen in Figures 2 and 4 that the solution according to the invention can be used to produce an extremely compact pumping unit A, with dimensions no greater than those of a similar pumping unit according to the prior art.
  • Clearly, provided that the principle of the invention is retained, the forms of application and the details of construction can be varied widely from what has been described and illustrated purely by way of non-limiting example, without thereby departing from the scope of protection of the invention as defined by the attached claims.

Claims (4)

  1. A hydraulic pumping assembly (A) for a boiler (B) of an installation for heating and generating hot sanitary water, the boiler (B) including a primary heat exchanger (21) for heating a flow of water for a hydraulic heating circuit (22, 24), a secondary heat exchanger (25) for transferring heat from a flow of water coming from the primary heat exchanger (21) to a flow of sanitary water, and a by-pass conduit (31) for the protection of the primary heat exchanger (21);
    the hydraulic pumping assembly (A) comprising
    a body (1) with an outlet (3) and a first inlet (2) for connection to said primary heat exchanger (21) and to a return pipe of said heating circuit (22, 24), respectively, and with a second inlet (4) for receiving a flow of heating water from said secondary heat exchanger (25);
    between the outlet (3) and the first inlet (2) in said body (1) there being provided a circulation pump (7) and a three-way electric valve (8), hydraulically in series with one another, said three-way electrical valve (8) being further connected to said second inlet (4);
    the pumping assembly (A) being characterised in that said by-pass conduit (31) is provided inside said body (1), the by-pass conduit (31) being provided between the second inlet (4) of said body (1) and an inlet (33) of said circulation pump (7).
  2. An installation for heating and for the generation of warm sanitary water, comprising a boiler (B) including a hydraulic pumping assembly (A) according to claim 1.
  3. An installation according to Claim 2, characterised in that said by-pass conduit (31) is provided as a seeping conduit in the obturator or shutter of said electric valve (8).
  4. An installation according to any of claims 2 to 3, characterised in that in said by-pass conduit (31) there is provided a one-direction hydraulic valve (32), equally provided inside said body (1).
EP12722856.7A 2011-04-13 2012-04-12 Hydraulic unit Active EP2697570B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RS20190809A RS59049B1 (en) 2011-04-13 2012-04-12 Hydraulic unit
EP18197036.9A EP3453978A3 (en) 2011-04-13 2012-04-12 Pumping unit for a boiler of an installation for heating and for generating domestic hot water

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000334A ITTO20110334A1 (en) 2011-04-13 2011-04-13 HYDRAULIC PUMPING UNIT FOR A BOILER FOR A HEATING AND HEALTH WATER GENERATION SYSTEM
PCT/IB2012/051778 WO2012140584A1 (en) 2011-04-13 2012-04-12 Hydraulic unit

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP18197036.9A Division-Into EP3453978A3 (en) 2011-04-13 2012-04-12 Pumping unit for a boiler of an installation for heating and for generating domestic hot water
EP18197036.9A Division EP3453978A3 (en) 2011-04-13 2012-04-12 Pumping unit for a boiler of an installation for heating and for generating domestic hot water

Publications (2)

Publication Number Publication Date
EP2697570A1 EP2697570A1 (en) 2014-02-19
EP2697570B1 true EP2697570B1 (en) 2019-04-24

Family

ID=44554204

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18197036.9A Withdrawn EP3453978A3 (en) 2011-04-13 2012-04-12 Pumping unit for a boiler of an installation for heating and for generating domestic hot water
EP12722856.7A Active EP2697570B1 (en) 2011-04-13 2012-04-12 Hydraulic unit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP18197036.9A Withdrawn EP3453978A3 (en) 2011-04-13 2012-04-12 Pumping unit for a boiler of an installation for heating and for generating domestic hot water

Country Status (5)

Country Link
EP (2) EP3453978A3 (en)
IT (1) ITTO20110334A1 (en)
RS (1) RS59049B1 (en)
TR (1) TR201910735T4 (en)
WO (1) WO2012140584A1 (en)

Cited By (1)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
FR3105312A1 (en) * 2019-12-23 2021-06-25 Wilo Intec PUMP FOR HYDRAULIC INSTALLATION, AND CORRESPONDING HYDRAULIC INSTALLATION

Families Citing this family (6)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
EP3150923B2 (en) * 2015-10-02 2022-06-08 Grundfos Holding A/S Hydraulic system
EP3150924B1 (en) * 2015-10-02 2019-07-31 Grundfos Holding A/S Hydraulic system
ITUB20160469A1 (en) * 2016-01-22 2017-07-22 Ivar Spa ADJUSTMENT DEVICE FOR THERMAL SYSTEMS
IT201800000748A1 (en) * 2018-01-11 2019-07-11 Elbi Int Spa Hydraulic group for heating equipment.
CN111306780B (en) * 2019-12-09 2024-07-12 ē ęµ·ę ¼åŠ›ē”µå™Øč‚”ä»½ęœ‰é™å…¬åø Wall-mounted furnace
EP3982057B1 (en) * 2020-10-09 2025-05-21 Vaillant GmbH Hot water heating device

Family Cites Families (3)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
FR2211109A6 (en) * 1972-12-20 1974-07-12 Materiel Telephonique
DE19711179A1 (en) * 1997-03-18 1998-09-24 Wilo Gmbh Connection adapter
GB2388422A (en) * 2002-05-08 2003-11-12 Heatrae Sadia Heating Ltd Support platform for mounting control devices of a fluid system

Non-Patent Citations (1)

* Cited by examiner, ā€  Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
FR3105312A1 (en) * 2019-12-23 2021-06-25 Wilo Intec PUMP FOR HYDRAULIC INSTALLATION, AND CORRESPONDING HYDRAULIC INSTALLATION
EP3842696A1 (en) * 2019-12-23 2021-06-30 Wilo Intec Pump for hydraulic system, and corresponding hydraulic system

Also Published As

Publication number Publication date
ITTO20110334A1 (en) 2012-10-14
TR201910735T4 (en) 2019-08-21
EP3453978A2 (en) 2019-03-13
EP2697570A1 (en) 2014-02-19
WO2012140584A1 (en) 2012-10-18
RS59049B1 (en) 2019-08-30
EP3453978A3 (en) 2019-06-12

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