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EP4455560A1 - Gas-flüssigkeitsabscheider für ein wärmeträger-zirkulationssystem - Google Patents

Gas-flüssigkeitsabscheider für ein wärmeträger-zirkulationssystem Download PDF

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Publication number
EP4455560A1
EP4455560A1 EP23169623.8A EP23169623A EP4455560A1 EP 4455560 A1 EP4455560 A1 EP 4455560A1 EP 23169623 A EP23169623 A EP 23169623A EP 4455560 A1 EP4455560 A1 EP 4455560A1
Authority
EP
European Patent Office
Prior art keywords
heat medium
container
heat exchanger
main body
container main
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
EP23169623.8A
Other languages
English (en)
French (fr)
Inventor
Kohei Nishida
Takuya Nakao
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.)
Daikin Europe NV
Original Assignee
Daikin Europe NV
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 Daikin Europe NV filed Critical Daikin Europe NV
Priority to EP23169623.8A priority Critical patent/EP4455560A1/de
Publication of EP4455560A1 publication Critical patent/EP4455560A1/de
Pending legal-status Critical Current

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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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/12—Preventing or detecting fluid leakage
    • 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
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/083—Venting arrangements
    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/208—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with tubes filled with heat transfer fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/14—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically both tubes being bent
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0206—Heat exchangers immersed in a large body of liquid
    • F28D1/0213—Heat exchangers immersed in a large body of liquid for heating or cooling a liquid in a tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/12—Safety or protection arrangements; Arrangements for preventing malfunction for preventing overpressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/18—Safety or protection arrangements; Arrangements for preventing malfunction for removing contaminants, e.g. for degassing

Definitions

  • the present invention relates to a heat medium storage device. More in particular, the invention relates to safety improvements to heat medium storage devices having heat exchanging elements.
  • EP2080975A1 in the name of ATLANTIC CLIMATISATION ET VENT discloses a device for heat exchange between fluids belonging to two circuits.
  • the device has a reservoir to receive coolant e.g. water, and a coolant inlet equipped at a lower part of the reservoir.
  • a coolant outlet is equipped at an upper part of the reservoir.
  • a coaxial heat pipe is arranged at inside of the reservoir, and is immersed in the coolant.
  • An inner tube of the pipe is connected to the inlet at an end of the reservoir, and opens at another end of the reservoir.
  • the inner tube is provided as a passage for the coolant.
  • An outer tube of the pipe is provided as a passage for refrigerant.
  • EP1965164A1 in name of ATLANTIC CLIMATISATION ET VENT discloses a device for heat exchange between fluids belonging to two circuits.
  • the device has a reservoir to receive coolant fluid.
  • the reservoir is equipped with a coolant fluid inlet arranged in a lower part of the reservoir and an outlet of a coolant fluid arranged in an upper part.
  • An exchanger with coaxial tubes is arranged inside the reservoir, and is immersed in the fluid.
  • An inner tube is connected to the inlet at an end, and is opened in the reservoir at another end.
  • the tube has a section between the inlet and the exchanger, where the section is uncovered by an outer tube in which leakage opening is arranged.
  • the present invention aims to resolve at least some of the problems and disadvantages mentioned above.
  • the invention thereto aims to provide gas-liquid separator for a heat medium circulation system, said gas-liquid separator having improved gas-liquid separation which prevent the spreading of any leaked refrigerant to any user-side elements e.g., heat exchangers.
  • the present invention thereof serve to provide a solution to one or more of above-mentioned disadvantages.
  • the present invention relates to a gas-liquid separator for heat medium circulation system according to claim 1.
  • the invention relates to a gas-liquid separator for heat medium circulation system comprising:
  • the container is further provided with a container subpart at the upper part of the container main body and be in fluid communication with the internal space of the container main body.
  • the container subpart has a width smaller than the width of the container main body, when the gas-liquid separator is viewed from above.
  • the internal volume of the container subpart is up to 5% of the volume of the container. More preferably, the internal volume of the container subpart is up to 10%, 15%, 20%, most preferably, 25% of the volume of the container.
  • Refrigerants used in heat pumps, air-conditioning or other similar refrigerant using installations have lower densities than water or other heat mediums with which said refrigerants are expected to exchange heat (e.g. mineral oil).
  • the device of the present invention is particularly suited, though not exclusively, to the use of water as a heat medium.
  • Water has a higher density than refrigerants, even when said refrigerants are compressed above normal operating pressures expected in heat pumps or air conditioning installations.
  • the present invention takes advantage of the difference of density between refrigerant and heat medium, in particular the buoyancy effects produced by said difference. In this way, any refrigerant making its way to the inside of the container along with the heat medium via the first outlet will naturally have the tendency to separate from said heat medium and float upwards and pool over the heat medium.
  • any leaked refrigerant will tend to pool and be retained inside the internal volume of said subpart.
  • the refrigerant passage of the internal heat exchanger is part of a refrigerant circuit including at least one compressor for compressing said refrigerant.
  • the container main body and the container subpart are formed with a cylindrical shape, wherein both of the cylindrical central axes are common.
  • the cylindrical shape and its subpart, as well as their substantial concentricity advantageously allow for easier manufacturing. This configuration is particularly efficient in capturing any leaked refrigerant when the distal end of the heat medium of the heat exchanger is located near the axis of the container subpart.
  • the container main body and the container subpart are formed with a cylindrical shape, wherein both of the cylindrical central axes are offset.
  • the cylindrical shape and its subpart advantageously allow for easier manufacturing.
  • This configuration is particularly efficient in capturing any leaked refrigerant when the distal end of the het medium of the heat exchanger is located near the central axis of the container subpart.
  • the minimal distance between the distal end of the heat medium passage and the central axis of the container subpart is smaller than the minimal distance between the heat medium outlet and the central axis of the container subpart, when the gas-liquid separator is viewed from above.
  • the heat medium outlet is located near a container wall and diametrically opposite to the container subpart. In this way, the heat medium outlet is advantageously distanced from any refrigerant coming from either the container subpart or the distal end of the heat medium passage of the heat exchanger, thereby eliminating the risk of refrigerant entering the heat medium outlet.
  • the internal heat exchanger is a double tube heat exchanger with the heat medium passage in which the heat medium flows and the refrigerant passage in which the refrigerant flows defining the tubes of the double tube heat exchanger.
  • the tubes of the double tube heat exchanger are substantially coaxial. In this way, the heat exchange between the refrigerant and the heat medium is advantageously made more uniform along the length of the heat exchanger.
  • the inner tube of the heat exchanger is configured as a heat medium passage and the space between the inner and outer tube is configured as a refrigerant passage. In this way, both the heat medium inside the container and the heat medium inside the heat exchanger are, advantageously, able to simultaneously exchange heat with the refrigerant flowing through the refrigerant passage of the heat exchanger.
  • the double tube heat exchanger is formed in a spiral or helical shape, wherein the central axis of the helix or spiral extends in the height direction of the gas-liquid separator.
  • the heat exchanger advantageously has a larger heat exchange area, said heat exchange area being defined by both the inner and outer sides of the refrigerant passage.
  • the larger heat exchange area permits more heat to be exchanged between the refrigerant and the heat medium before the refrigerant returns to the compressor side of the refrigerant circuit.
  • the helical or spiral shape of the internal heat exchanger permits a more efficient use of the internal space of the container, advantageously allowing, for example, for smaller containers to be used.
  • the distal end of the heat medium passage of the heat exchanger is located adjacent and is oriented tangential to a wall of the container main body.
  • the spiral or helical shape of the heat exchanger includes at least two turns, the last of which turns includes the distal end of the heat medium passage of the heat exchanger, the distal end of the heat medium passage being located at least 10mm farther from the axis of the spiral or helix than each preceding turn.
  • heat medium leaving the heat exchanger is advantageously ejected near the inner lateral walls of the container and in a direction that is substantially tangential to said walls.
  • the heat medium outlet is located in substantial overlap with the cylindrical axis of the container main body.
  • the heat medium outlet is shielded by the convection current around the inner and outer perimeter of the heat exchanger which force any leaked refrigerant upwards and away from said outlet. This advantageously makes it impossible for any refrigerant to leave the container via the heat medium outlet.
  • the present invention concerns gas-liquid separator for a heat medium circulation system.
  • the heat medium circulation system comprises of the gas-liquid separator, a pump, a controller that controls at least the pump and a usage-side heat exchanger like a radiator.
  • the gas-liquid separator includes a container with an internal heat exchanger for exchanging heat between a heat medium and a refrigerant, the passages for each of these fluids being both inside the container and immersed in heat medium.
  • the heat medium passage of the internal heat exchanger, the pump and the usage-side heat exchanger are connected by heat medium pipes, and the heat medium circulates inside the heat medium pipes.
  • the refrigerant passage of the internal heat exchanger, an expansion valve, a heat source-side heat exchanger and a compressor are connected by refrigerant pipes, and the refrigerant circulates inside the refrigerant pipes.
  • propane can be used as a refrigerant.
  • R32 refrigerant can be also used.
  • the heat medium passage includes a first outlet in fluid communication with the internal volume of the container.
  • the container is provided with a container subpart connected to the top of said container.
  • the internal volume of the container subpart is provided in fluid communication with the internal volume of the container.
  • the location of the container subpart above the heat medium outlet allows for superior liquid gas separation, as any refrigerant leaking into the container quickly returns to a gaseous state and floats to the top of the internal volume of the container and into the internal volume of the container subpart.
  • the smaller width of the container subpart in combination with the low buoyancy of the refrigerant contribute to trap the latter and prevent it from leaving the container to any user-side elements.
  • the terms "one or more” or “at least one”, such as one or more or at least one member(s) of a group of members, is clear per se, by means of further exemplification, the term encompasses inter alia a reference to any one of said members, or to any two or more of said members, such as, e.g., any ⁇ 3, ⁇ 4, ⁇ 5, ⁇ 6 or ⁇ 7 etc. of said members, and up to all said members.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP23169623.8A 2023-04-24 2023-04-24 Gas-flüssigkeitsabscheider für ein wärmeträger-zirkulationssystem Pending EP4455560A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23169623.8A EP4455560A1 (de) 2023-04-24 2023-04-24 Gas-flüssigkeitsabscheider für ein wärmeträger-zirkulationssystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23169623.8A EP4455560A1 (de) 2023-04-24 2023-04-24 Gas-flüssigkeitsabscheider für ein wärmeträger-zirkulationssystem

Publications (1)

Publication Number Publication Date
EP4455560A1 true EP4455560A1 (de) 2024-10-30

Family

ID=86226675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23169623.8A Pending EP4455560A1 (de) 2023-04-24 2023-04-24 Gas-flüssigkeitsabscheider für ein wärmeträger-zirkulationssystem

Country Status (1)

Country Link
EP (1) EP4455560A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030196450A1 (en) * 2002-03-18 2003-10-23 Sadao Higami Refrigerant processing apparatus for collected equipment, and oil separator
EP1965164A1 (de) 2007-02-28 2008-09-03 Atlantic Climatisation et Ventilation Vorrichtung zum Wärmeaustausch zwischen Flüssigkeiten, die zwei verschiedenen Kreisläufen angehören
EP2080975A1 (de) 2008-01-16 2009-07-22 Atlantic Climatisation et Ventilation Vorrichtung zum Wärmeaustausch zwischen Flüssigkeiten, die zwei verschiedenen Kreisläufen angehören

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030196450A1 (en) * 2002-03-18 2003-10-23 Sadao Higami Refrigerant processing apparatus for collected equipment, and oil separator
EP1965164A1 (de) 2007-02-28 2008-09-03 Atlantic Climatisation et Ventilation Vorrichtung zum Wärmeaustausch zwischen Flüssigkeiten, die zwei verschiedenen Kreisläufen angehören
EP2080975A1 (de) 2008-01-16 2009-07-22 Atlantic Climatisation et Ventilation Vorrichtung zum Wärmeaustausch zwischen Flüssigkeiten, die zwei verschiedenen Kreisläufen angehören

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