EP4635255A1 - Dispositif de chauffage et système de chauffage comprenant un tel dispositif de chauffage - Google Patents

Dispositif de chauffage et système de chauffage comprenant un tel dispositif de chauffage

Info

Publication number
EP4635255A1
EP4635255A1 EP23720224.7A EP23720224A EP4635255A1 EP 4635255 A1 EP4635255 A1 EP 4635255A1 EP 23720224 A EP23720224 A EP 23720224A EP 4635255 A1 EP4635255 A1 EP 4635255A1
Authority
EP
European Patent Office
Prior art keywords
heating
evaporator
slats
heating device
induction
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.)
Pending
Application number
EP23720224.7A
Other languages
German (de)
English (en)
Inventor
Radim KOCHWASSER
Alena Alaia
Milan BURANSKY
Martin BUBENIK
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.)
Mss Projekt SRO
Original Assignee
Mss Projekt SRO
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 Mss Projekt SRO filed Critical Mss Projekt SRO
Publication of EP4635255A1 publication Critical patent/EP4635255A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid

Definitions

  • Heating device and a heating system comprising such heating device
  • the invention concerns the heating device and a heating system comprising such a heating device.
  • a heat pump process has three phases, at first heat is obtained from the surrounding air, then this heat is increased and finally used, for example, to heat the house or domestic water.
  • the first stage is ensured by evaporator 1 , which circulates the coolant in the pipeline covered by lamellas 5, where the temperature of the coolant is always lower than the temperature of the surrounding air. In the other words, the coolant receives heat from the surroundings and heats up.
  • the coolant is compressed by compressor 2, which significantly increases its temperature. In this way, hot gas is created, and in the third phase the gas is led to a heat exchanger 3, where it transfers the heat to the secondary circuit, which distributes it around a house.
  • the cooled coolant passes in the form of a liquid through an expansion nozzle or a capillary, where it is turned into a gas again, for which it consumes the heat of vaporization, which is cooled sharply below the ambient temperature.
  • the coolant is subsequently heated in the evaporator 1 by receiving heat from its surroundings, and entire process continues.
  • the design of the heat pump is presented in Fig. 1 .
  • Another way is preheating method.
  • the heat for defrosting of the evaporator 1 is taken from a heating system, when it is necessary, by change of the meaning of the circuit function, to heat the entire part of the circuit.
  • Even for this phase of the heat pump's operation it is necessary to take the necessary energy from the heating system, which will cool it down.
  • Circuits with a small amount of water, low- energy houses, etc. are particularly sensitive to this phase, as the energy consumption of the house will increase due to the operation of the direct heating element, which significantly worsens the overall energy balance of the operation. This is the main reason why use of, for example, a direct heater is immediately rejected.
  • Another disadvantage of the method is long defrosting time, as the device is essentially out of order during defrosting.
  • the defrosting process can take several tens of minutes under certain adverse conditions.
  • sudden changes in pressure during reversal in the cooling circuit can significantly shorten the life of an engine of a compressor, check valves, solenoid valves, four-way valves and other components.
  • the document EP0462544 describes an induction heating device, which comprises a cylindrical source of magnetic induction in a form of an induction coil, outside of which a tubular heating body made of an electrically conductive material, intended for a flow of a heated liquid, short-circuited by shorting clamp, is placed in its magnetic field.
  • the mentioned device is used to transfer of a magnetic flux by use of magnetic core to the heating device.
  • a short-circuited non-magnetic tube wrapped around the outer surface of the coil it does not serve to dissipate heat here. The heat is not removed by the water in the pipe. The hot water is generated by induction, therefore, it cannot dissipate heat, quite the opposite.
  • JPS56146824 describes a device intended for heating a magnetic material inserted in a coil, where its heating is the goal of this device. Therefore it is the opposite way of use, where the core is required.
  • the document LIS2011180531 presents a coil, where a tubular body is inserted, but the document also mentions the necessity of presence of a magnetic material.
  • This material is heated by the coil and enables heating of a substance, which flows through the tube. So the tube is used for completely different reason than the one we solve with our modification.
  • it also heats up in the same way as the core of the above mentioned document EP0462544.
  • further cooling of the magnetic elements is not possible there, because it is the heat of these magnetic materials that causes the heating of the liquid passing through the pipe, and lowering its temperature would thus result in lowering the temperature of the heated liquid as well, which leads to the same problem, which we want to solve in the document EP0462544.
  • a combination of the documents EP0462544 and the document LIS2011180531 does not solve the problem either, for the reason that the device according to the EP document does not allow operation without presence of a magnetic core. Therefore, if the core will be replaced by tube, as stated in the US document, the result will be not only change of the design of the core, i.e. from a solid shape to a tube shape, but also a significant deterioration of its output. Its core size is crucial there and any variant of a hollow core is thus ruled out.
  • the state of the art is also an induction heating device comprising a source of magnetic induction, where in a magnetic field a tubular heating element intended for the flow of heated liquid is placed, which is however made of an electrically conductive non-magnetic material, which seemingly contradicts the principle of induction heating.
  • a tubular heating element intended for the flow of heated liquid is placed, which is however made of an electrically conductive non-magnetic material, which seemingly contradicts the principle of induction heating.
  • In order to be able to heat non-magnetic material by induction it was found out, that it needs to be supplemented by shorting clamp. This also eliminates need for a magnetic core.
  • the disadvantage of such heating device is the necessity of the short- circuiting terminal, which is danger to its surroundings, because it transmits unwanted heat, causes tension and vibrations, and may cause an electric shock to an operator in case of improper handling.
  • heating device comprising a non-magnetic material intended for heating and an induction heating coil for heating it, where this non-magnetic material is stored in the magnetic field of this induction heating coil, where this non-magnetic material is short-circuited by itself.
  • the heating device is an evaporator 1 of a heat pump, comprising an induction heating coil 6, tubes 4 intended for passing of the heated coolant, and slats 5, where the non-magnetic material designated for heating is the slats 5.
  • the heating device is an evaporator 1 of a heat pump, comprising an induction heating coil 6, tubes 4 intended for passing of the heated coolant, and slats 5, where a non-magnetic material designed to be heated is at least part of at least one tube 4.
  • induction coil 6 is located on the outside of the evaporator 1 in front of the slats 5, and its surface covers 50-90% of the surface of the slats 5.
  • the induction coil 6 is fitted 2 to 3 cm from the slats 5.
  • the induction coil 6 is located inside the evaporator 1 between the slats 5 and the tubes 4.
  • the induction coil 6 is located around the circumference of the evaporator 1 .
  • heating system characterized in that it comprises a heating device according to one of the claims, a measuring device for determining the temperature of the heated material, data linked to a control unit for switching the induction coil 6 with regards to the determined temperature of the heated coolant.
  • Fig. 1 represents the circuit diagram of a heating pump according to the state of the art
  • Fig. 2 represents the profile of the evaporator equipped by heating equipment according to the invention.
  • the heating device comprises an evaporator 1 of a heat pump presented in Fig. 2, which comprises an induction coil 6, which is positioned relative to the evaporator 1 in such a way, that its magnetic field is within the reach of the structural elements of the evaporator 1 , e.g. the slats 5 of the evaporator 1 and/or tubes 4 intended for passing of a heated coolant, which are intended for heating.
  • the evaporator 1 is a standard outdoor heat pump exchanger, see the above mentioned description in the state of the art, which comprises the parallel fitted tubes 4 intended for passing of a heated coolant, which are connected to each other by pipe elbows, thus forming one tube passing through the inner part of the evaporator 1 , the slats 5 covering these tubes 4 before access from the outside and a fan not shown in the picture, intended for blowing these slats 5, and which blows outwards from the evaporator 1 .
  • the presented technology can also be used for heating of another non-magnetic heated devices or materials, which allow the creation of eddy currents and thus their heating. Not all of them require existence of the shorting terminal to create eddy currents, as they are self-shorting, i.e. they are shorted by themselves.
  • a non-magnetic tubular spiral can be used, where the ends of which are directly connected to each other, which forms a non-magnetic grid, which by the very definition of the term "grid" it is also itself connected, and so on.
  • the shortening terminals are not necessary, but it is possible to have both of the solution or only one of them.
  • control unit which switches it according to predefined change of pressure in the circuit, if drop of coolant temperature appear, etc., and which also controls, for example, the operation of the fan, which fully starts, when defrosting is in progress, which blows the slats 5 and thus remove the rest of the water condensation out of the evaporator 1 .
  • control unit which switches it according to predefined change of pressure in the circuit, if drop of coolant temperature appear, etc., and which also controls, for example, the operation of the fan, which fully starts, when defrosting is in progress, which blows the slats 5 and thus remove the rest of the water condensation out of the evaporator 1 .
  • the measurement of the above- mentioned parameters is carried out by standard measuring devices, known from the state of the art, which transmit the measured values to the control unit intended for its evaluation.
  • the induction coil 6 is placed in front of the slats 5 of the evaporator 1 , for example in such way, that it basically copies some slats 5, i.e. it is parallel to them, while overlapping 50-90% of the area given by the slats 5. This percentage distribution depends on the types of the evaporator 1 and the power of the induction coils 6.
  • the induction coil 6 in front of the slats 5 is mounted on supports 8 at a distance from the slats 5, preferably 2-3 cm.
  • the induction coil 6 is located inside the evaporators 1 , i.e. between the slats 5 and the tubes 4, on the connecting metal knees of the tubes 4, which close the loop of the evaporator 1 , or around the perimeter of the evaporator 1 .
  • the principle is as follows: The inductive transfer of energy from the induction coil 6 causes immediately heating of the slats 5 and tubes 4 of the evaporator 1 .
  • the defrosting efficiency can be increased by subsequently switched fan of the evaporator 1 , according to a predetermined algorithm, which results in rapid cleaning of the evaporator 1 from water, without need to cool the heated space, and with minimal costs.
  • the induction coil 6 connected in this way is not dangerous for the operator or for other devices.
  • the power of the induction coil 6, which is necessary for sufficient heating of the required parts of the evaporator 1 and thus for its defrosting were measured.
  • a frozen evaporator 1 with an output 2,5 kW, equipped with an induction coil 6 fitted in front of the slats 5, which covers 50% of their surface, with output 700 W the tubes 4 were defrosted (from temperature of - 21 °C to the final temperature 13,4°C) in 1 min and 40 s.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un dispositif de chauffage comprenant un matériau non magnétique conçu pour chauffer et une bobine de chauffage par induction pour chauffer le matériau, ce matériau non magnétique étant stocké dans le champ magnétique de cette bobine de chauffage par induction, ce matériau non magnétique étant court-circuité par lui-même.
EP23720224.7A 2023-04-17 2023-04-17 Dispositif de chauffage et système de chauffage comprenant un tel dispositif de chauffage Pending EP4635255A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CZ2023/050019 WO2024217606A1 (fr) 2023-04-17 2023-04-17 Dispositif de chauffage et système de chauffage comprenant un tel dispositif de chauffage

Publications (1)

Publication Number Publication Date
EP4635255A1 true EP4635255A1 (fr) 2025-10-22

Family

ID=86272545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23720224.7A Pending EP4635255A1 (fr) 2023-04-17 2023-04-17 Dispositif de chauffage et système de chauffage comprenant un tel dispositif de chauffage

Country Status (2)

Country Link
EP (1) EP4635255A1 (fr)
WO (1) WO2024217606A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218445Y2 (fr) * 1972-07-13 1977-04-26
JPS56146824A (en) 1980-04-10 1981-11-14 Nissin Electric Co Ltd Induction heating device for pipe
JPH04230987A (ja) 1990-06-18 1992-08-19 Nikko Kk 電磁誘導加熱器
JP2004212001A (ja) * 2003-01-07 2004-07-29 Sanyo Electric Co Ltd 冷蔵庫
JP5228621B2 (ja) * 2008-05-23 2013-07-03 三菱電機株式会社 ヒートポンプ用熱交換器及びこれを用いたヒートポンプ装置
US20110180531A1 (en) 2010-01-25 2011-07-28 Air Generate Inc Induction heater having flexible geometry
DE202013006214U1 (de) * 2012-11-30 2014-03-03 Bundy Refrigeration International Holding B.V. Wärmetauscher

Also Published As

Publication number Publication date
WO2024217606A1 (fr) 2024-10-24

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