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 
• • 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 heaters 
  • F24H9/142—Connecting hydraulic components

Definitions

• the present invention relates to a pumping unit 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.
• FIG. 1 of the appended drawings schematically illustrates a boiler B of a known type, which comprises 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 , a ⁇ ndjlowing 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.
• One object of the present invention is to provide a pumping unit 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.
• Figure 1 is a partial schematic illustration of a boiler for 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 according to the present invention.
• Figure 3 is a diagram similar to that of Figure 1 , and represents in a schematic and partial way a boiler for an installation for heating and for generating domestic hot water, including a pumping unit 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.
• 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.
• 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.
• the by-pass conduit 31 can be formed in the body 1 between the inlets 2 and 4 of the solenoid valve 8, once again with or without the non-return valve 32.
• the by-pass conduit can be made in the form of a calibrated passage which passes through the plug of the solenoid valve 8 to allow a controlled trickle of liquid.
• the by-pass function for the protection of the primary heat exchanger 21 can be provided by the (forced) energization of the solenoid valve 8 by an associated control unit EU, such that the inlet 4 is put into communication with the inlet of the pump 7, still inside the body 1.

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)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44554204

Family Applications (1)

Country Status (5)

Cited By (6)

Families Citing this family (1)

Citations (2)

Family Cites Families (1)

• 2011
  • 2011-04-13 IT IT000334A patent/ITTO20110334A1/it unknown
• 2012
  • 2012-04-12 EP EP18197036.9A patent/EP3453978A3/en not_active Withdrawn
  • 2012-04-12 TR TR2019/10735T patent/TR201910735T4/tr unknown
  • 2012-04-12 RS RS20190809A patent/RS59049B1/sr unknown
  • 2012-04-12 WO PCT/IB2012/051778 patent/WO2012140584A1/en not_active Ceased
  • 2012-04-12 EP EP12722856.7A patent/EP2697570B1/en active Active

Patent Citations (2)

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