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
  • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
  • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
  • F24H1/225—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating electrical central heating boilers
• • 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
  • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
  • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
  • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
  • F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance

Definitions

• the invention relates to a heat carrier fluid heating unit for central heating installation.
• a central heating installation comprises a pipe circuit in which one or more radiators or convectors are connected, at least one expansion device and at least one heating station capable of heating the heat transfer fluid which is made circulate in the circuit.
• the heating station of the installation can in particular be a coal, gas or oil boiler, and there are also electric heating stations.
• the object of the present invention is to provide a central heating installation in which the heating station consists of one or more electric heating units of simple and compact structure, and allowing efficient and flexible operation of the installation.
• the present invention relates to a central heating heat transfer fluid heating unit.
• This heating unit consists of a tank comprising a tubular outer wall, a first end wall and a second end wall, these walls defining a substantially cylindrical space.
• a first inner tubular partition and a second inner tubular partition, substantially concentric with the outer tubular wall, are mounted in the reservoir, the second inner partition having a diameter smaller than that of the first tubular partition.
• a first annular space is located between the tubular outer wall and the first interior partition; a second annular space is located between the first interior partition and the second interior partition; a central channel is located at the interior of the second interior partition.
• the second annular space is in communication with the central channel near the first end wall and in communication with the first annular space near the second end wall.
• the reservoir is provided with an inlet orifice opening into the first annular space close to the first end wall and an outlet orifice, in the second end wall, opening out from the central channel.
• At least one electric immersion heater is mounted in the central channel.
• At least one thermostatic probe is mounted in the tank.
• the components of the heating unit are preferably made of metal.
• tubular outer wall, the first and second end walls and the first interior partition may in particular be made of steel.
• the second interior partition can also be made of steel.
• this second interior partition is made of copper.
• the heating unit comprises, in said second annular space, heat transfer elements integral with said second external partition.
• These heat transfer elements may in particular consist of two rings spaced from one another, integral with said second interior partition and arranged perpendicular to the axis thereof, these two rings being pierced with several holes and being connected between them at. by means of several metal bars spaced from each other.
• these metal bars advantageously have a ribbed outer surface.
• these metal bars can also carry fins.
• Said heat transfer elements are made of a material having good conductivity.
• the two rings between which the metal bars are mounted can be made of steel, but they are advantageously made of copper.
• the metal bars themselves are preferably made of copper.
• At least one thermostatic probe is mounted in the tank. To ensure greater operational safety, it may be desirable for two thermostatic sensors to be mounted in the tank. According to a particular embodiment, this probe or these thermostatic probes are mounted in the second annular space.
• the first annular space is placed in communication with the second annular space. Thanks to several openings distributed around the periphery of said first interior partition, near the second end wall.
• near the second end wall here means that the distance between these openings and the second end wall is significantly smaller (for example, at least four times smaller) than the distance of these openings and the first end wall.
• a ring can be mounted in the first annular space, between the tubular outer wall and the first interior partition.
• This ring which (in the axial direction) is pierced with several holes distributed along its periphery, is located at an intermediate level between the inlet opening of the tank and the openings which are formed in said first intermediate partition.
• the communication of the second annular space with the central channel is advantageously ensured by the fact that a spaced is formed between the second interior partition and the first end wall.
• the inlet opening of the reservoir is formed in the tubular outer wall, near the first end wall. This orifice thus opens radially into the first annular space.
• the reservoir is preferably provided with means making it possible to fix it on a support.
• two electric immersion heaters are mounted in the central channel of the heating unit.
• the present invention also relates to a central heating installation with heat transfer fluid, comprising a piping circuit in which one or more radiators or convectors are connected, at least one circulation pump, at least one expansion device and at least one heating unit, this installation comprising at least one room thermostat.
• this installation is connected at least one heating unit according to the invention, the installation comprising, in addition, an automated control station capable of receiving the signals from the room thermostat (s) and the probe (s). thermoplastics of the heating unit (s), and to control the starting and stopping of operation of the circulation pump (s) and the immersion heater (s) of the heating unit (s).
• the heating installation according to the invention may possibly comprise two or more heating units according to the invention, these heating units then being connected in parallel in the circuit.
• the heat transfer fluid which circulates in the installation is preferably oil and, more particularly a mineral oil specially designed for the transfer of calories.
• the heating unit or units connected in the circuit are preferably able to heat the heat-transfer fluid to a temperature above 100 ° C.
• the installation can in particular be adjusted in such a way that the temperature of the heat-transfer fluid (in particular, the oil) is limited to a temperature of between 105 ° and 110 ° C., at the outlet of the heating unit or units.
• the temperature of the heat-transfer fluid in particular, the oil
• the temperature of the heat-transfer fluid is limited to a temperature of between 105 ° and 110 ° C., at the outlet of the heating unit or units.
• FIG. 1 is an axial sectional view of the heating unit
• Fig. 2 is a cross section of the heating unit along the line II-II of FIG. 1
• Fig. 3 is a cross section of the heating unit along the line III-III of FIG. 1.
• the heating unit consists of a tank comprising a tubular exterior wall 1, a first end wall 2 and a second end wall 3.
• a first tubular interior partition 4, concentric with the exterior wall 1, is mounted in the tank.
• a second tubular internal partition 5, also concentric with the external wall 1, is mounted inside the first partition 4.
• a first annular space 6 is thus located between the outer wall 1 and the first interior partition 4 and a second space 4 and the second interior partition 5.
• a central channel 8 is located inside the second tubular interior partition 5.
• first end wall 2 is in fact formed, essentially, by a ring 9 welded between the tubular elements which respectively form the external wall 1 and the first internal partition 4 and by a ring 10 welded between the tubular elements which respectively form the first interior partition 4 and the second interior partition 5.
• the second end wall is formed, essentially, by a ring 11 welded between the tubular elements which respectively form the outer wall 1 and the first interior partition 4 and by a ring 12 welded between the tubular elements which respectively form the first partition 4 and the second inner partition 5.
• the reservoir is provided with an inlet orifice which consists of a tube 13 welded to the outer wall 1 and opening into the first annular space 6, near the first end wall 2.
• the reservoir is also provided with an outlet orifice which opens out from the central channel 8 and which consists of a tube 14 welded into the ring 12 (which is a constituent element of the second end wall 3).
• the second internal partition 5 externally carries three rings 15, 16, 17, the external diameter of which is equal (or slightly less) to the internal diameter of the first internal partition 4.
• the ring 15, which is located closest to the second end wall 3, is connected to the ring 12 by two thimbles 18.
• Two thermostatic probes 19 passing through orifices provided for this purpose in the ring 12, and by the said thimbles 18, are mounted in the second annular space 7.
• the connectors and electrical wires which allow these thermostatic probes 19 to be connected to a control station are not shown.
• the other two rings 16 and 17 are spaced from one another and connected to each other by means of twelve copper bars 20 regularly spaced from one another.
• the rings 16 and 17 are each pierced with twelve holes 21 which are angularly offset with respect to the bars 20, as can be seen in FIG. 3.
• Twelve holes 22 are provided in the first interior partition 4, near the second end wall 3. These holes 22 which are regularly distributed around the periphery of the first tubular interior partition 4, put the first annular space 6 in communication with the second annular space 7.
• a ring 23 pierced with eight holes 24 is mounted between the outer wall 1 and the first interior partition 4, at an intermediate level between the inlet pipe 13 and the holes 22 which are formed in the first interior partition 4.
• this ring 23 pierced with holes 24 regulates the flow of heat-transfer fluid which enters through the tube 13 and which rises towards the holes 22.
• a space is provided between the second interior partition 5 and the first end wall 2, which puts the second annular space 7 in communication with the central channel 8.
• Two electric immersion heaters 25 are located in the central channel 8. These immersion heaters 25 are fixed in a base 26 which is screwed into the ring 10, a bridge 27 ensuring the tightness of the assembly.
• Connectors 28 allow the immersion heaters 25 to be connected to power supply cables.
• the heat transfer fluid When passing through the central channel 8, the heat transfer fluid is in direct contact with immersion heaters 25 which bring it to the desired temperature. However, thanks to the thermal conductivity of the interior partitions 4 and 5, the heat transfer fluid is already preheated during its passage in the first annular space 6 and then especially during its passage in the second annular space 7 in which it enters contact not only with the second intermediate partition 5 but also with the heat transfer elements 16, 17 and 20.
• a heating unit as described is intended to be connected to the piping circuit of a central heating installation.
• the pipe circuit of such an installation are generally connected several radiators, at least one heating unit, at least one circulation pump and at least one expansion device.
• the installation also comprises at least one room thermostat and an automated control station capable of receiving signals from the room thermostats and from the heating unit (or heating units) , and to control the starting and stopping of operation of the circulation pump (or of the circulation pumps) and of the immersion heater (s) of the heating unit (or of the heating units).
• the heating capacity of a heating unit obviously depends on the power of the immersion heater (s) mounted in unit.
• the choice of appropriate power immersion heaters makes it possible to meet a desired heating capacity.
• the installation control station can then be programmed so that, depending on the heating requirement, one or two immersion heaters from one or more heating units are put into operation.
• the control station is also programmed so that the heating unit (s) can only operate when the circulation pump (s) are running.
• the heating units according to the invention are very compact, are of very simple construction, and allow great flexibility of operation of the installation in which they are connected.
• the heat transfer fluid that is circulated in the installation is preferably mineral oil for transfer of calories. This makes it possible in particular to heat the heat transfer fluid to a temperature above 100 ° C., and this remains possible, without problem, even at high altitude, in mountainous regions.
• a heating unit according to the invention is a compact device which contains only a small volume of heat transfer fluid and which, therefore, has a low thermal inertia. If the radiators or convectors installed in the installation are of the type with a large radiation surface and low internal volume, the installation as a whole will have low thermal inertia, which constitutes a real advantage.

Landscapes

• 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)
• Devices For Use In Laboratory Experiments (AREA)
• Resistance Heating (AREA)
• Tunnel Furnaces (AREA)
• Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
• Control Of Resistance Heating (AREA)
• Steam Or Hot-Water Central Heating Systems (AREA)
• Central Heating Systems (AREA)

Applications Claiming Priority (3)

Publications (3)

Family

ID=3896558

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Family Cites Families (8)

• 2000
  • 2000-06-09 BE BE2000/0374A patent/BE1013549A3/fr not_active IP Right Cessation
• 2001
  • 2001-05-17 US US10/297,658 patent/US6736329B2/en not_active Expired - Fee Related
  • 2001-05-17 AU AU2001263673A patent/AU2001263673A1/en not_active Abandoned
  • 2001-05-17 WO PCT/BE2001/000087 patent/WO2001094860A1/fr active IP Right Grant
  • 2001-05-17 DE DE60114615T patent/DE60114615T2/de not_active Expired - Fee Related
  • 2001-05-17 CA CA002411703A patent/CA2411703A1/fr not_active Abandoned
  • 2001-05-17 AT AT01937884T patent/ATE308726T1/de not_active IP Right Cessation
  • 2001-05-17 EP EP01937884A patent/EP1290380B8/de not_active Expired - Lifetime

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events