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EP4455559A1 - Séparateur gaz-liquide pour un système de circulation de milieu caloporteur - Google Patents

Séparateur gaz-liquide pour un système de circulation de milieu caloporteur Download PDF

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Publication number
EP4455559A1
EP4455559A1 EP23169621.2A EP23169621A EP4455559A1 EP 4455559 A1 EP4455559 A1 EP 4455559A1 EP 23169621 A EP23169621 A EP 23169621A EP 4455559 A1 EP4455559 A1 EP 4455559A1
Authority
EP
European Patent Office
Prior art keywords
tank
heat medium
outlet
heat exchanger
heat
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
EP23169621.2A
Other languages
German (de)
English (en)
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 EP23169621.2A priority Critical patent/EP4455559A1/fr
Publication of EP4455559A1 publication Critical patent/EP4455559A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • F28D7/022—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 the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
    • 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
    • F28D7/106—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 consisting of two coaxial conduits or modules of two coaxial conduits
    • 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

Definitions

  • the present invention relates to a gas-liquid separator. More in particular, the invention relates to a gas-liquid separator for a heat medium circulation system.
  • 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 a heat medium circulation system according to claim 1.
  • the invention relates to a gas-liquid separator for a heat medium circulation system, comprising;
  • the heat medium outlet opens into the tank at a lower position than where the first outlet of the internal heat exchanger opens into the tank.
  • 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.
  • any refrigerant making its way to the inside of the tank 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.
  • the first outlet of the heat exchanger located above the heat medium outlet, the path of any leaked refrigerant being introduced into the tank will never intersect said heat medium outlet. In this way, the risk of any refrigerant flowing out of the tank and into any usage-side heat exchanger is very nearly removed.
  • the refrigerant passage of the internal heat exchanger is part of a refrigerant circuit including at least one compressor for compressing said refrigerant.
  • the device further comprises:
  • the proximal end of the outlet tube is the heat medium outlet.
  • the heat medium outlet is distanced further from the first outlet of the heat exchanger. This advantageously permits further reducing the risk of any refrigerant flowing out of the tank and into any usage-side heat exchanger.
  • the proximal end of the outlet tube has a larger internal diameter than the heat medium outlet port.
  • pressure loss along the outlet tube is advantageously minimized, thereby greatly reducing the risk of cavitation in a pump placed downstream from the heat medium outlet port.
  • the tank is further equipped with a heat medium level indicator which indicator is in communication with a controller configured to stop the pump if the heat medium level is too low. In this way, cavitation in the pump is advantageously avoided.
  • the outlet tube is inside the tank, and one end of the outlet tube is connected to the heat medium outlet port and the outlet tube extends in the direction of the height of the tank.
  • This configuration of the outlet tube advantageously permits extracting heat medium from the upper, warmer layer of heat medium inside the tank.
  • the height of the proximal end of the outlet tube is lower than the height of the first outlet. In this way, ingress of any leaked refrigerant into the user side and any user heat exchangers is advantageously avoided.
  • the outlet tube may be telescopic and comprise at least two sections, the height of the heat medium outlet being automatically adjustable by means of a buoy in connection to the upper section of the outlet tube.
  • connection being, for example a length of cable, a rod or chain, said length being longer than the distance of the first outlet to the top inner surface of the tank.
  • the internal heat exchanger is a double tube heat exchanger having a heat medium passage in which the heat medium flows and a refrigerant passage in which the refrigerant flows defining the tubes of the double tube heat exchanger.
  • both tubes of the heat exchanger are substantially coaxial.
  • 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 tank 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 helical shape, wherein the central axis of the helix extends in the height direction of the tank.
  • 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 shape of the internal heat exchanger permits a more efficient use of the internal space of the tank, advantageously allowing, for example, for smaller tanks to be used.
  • the first inlet is located near the bottom of the tank and connected to the heat medium inlet, and the first outlet is located above the first inlet, the first outlet opening inside the tank.
  • the heated heat medium enters the tank via the first outlet at a height where the heat medium inside the tank is warmer.
  • locating the first outlet higher than the first inlet advantageously permits delivering any leaked refrigerant higher inside the tank and above the heat medium outlet.
  • the shape of the tank is substantially cylindrical shaped, the tank being installed so that a center axis of the tank extends in the height direction of the tank.
  • the shape of the tank is particularly easy and economical to manufacture while offering superior strength against internal pressure. Furthermore, this shape and orientation of the tank permit a more efficient use of its internal volume and, in particular, advantageously permit the most convenient internal shape for the installation of an internal helical heat exchanger.
  • the first outlet is located adjacent and substantially tangential to a wall of the tank.
  • the helical shape of the heat exchanger includes at least two turns, the last of which turns includes the first outlet, the distal end of said last coil being located at least 10mm farther from the axis of the helix than each preceding turn.
  • heat medium leaving the first outlet is advantageously ejected near the inner lateral walls of the tank and in a direction that is substantially tangential to said walls.
  • spiral grooves are provided on an inner wall of the tank, said inner wall being rounded.
  • these grooves have the same rotation as the coils of the heat exchanger.
  • the pitch of the spiral groves is at least the same as the pitch of the helix of the heat exchanger.
  • the pitch of the spiral groves increases progressively as the grooves reach the top inner volume of the tank. In this way, the flow of the heat medium entering the tank along the inner walls of the tank is used to further accelerate its rise towards the top of the tank and away from 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 heat medium tank 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 tank and immersed in heat medium.
  • the heat medium passage of the internal heat exchanger, the pump, 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 tank, which first outlet is located above a heat medium outlet in fluid communication with user-side elements. The location of said first outlet relative to the heat medium outlet allows for superior liquid gas separation, as any refrigerant leaking into the tank quickly returns to a gaseous state and floats to the top of the internal volume of the tank.
  • the first outlet being located higher than the heat medium outlet means that any rising refrigerant never crosses the heat medium outlet. This prevents the passage of any refrigerant towards any user-side element.
  • 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)
EP23169621.2A 2023-04-24 2023-04-24 Séparateur gaz-liquide pour un système de circulation de milieu caloporteur Pending EP4455559A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23169621.2A EP4455559A1 (fr) 2023-04-24 2023-04-24 Séparateur gaz-liquide pour un système de circulation de milieu caloporteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23169621.2A EP4455559A1 (fr) 2023-04-24 2023-04-24 Séparateur gaz-liquide pour un système de circulation de milieu caloporteur

Publications (1)

Publication Number Publication Date
EP4455559A1 true EP4455559A1 (fr) 2024-10-30

Family

ID=86226976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23169621.2A Pending EP4455559A1 (fr) 2023-04-24 2023-04-24 Séparateur gaz-liquide pour un système de circulation de milieu caloporteur

Country Status (1)

Country Link
EP (1) EP4455559A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5004046A (en) * 1990-06-11 1991-04-02 Thermodynetics, Inc. Heat exchange method and apparatus
DE19903833A1 (de) * 1999-02-01 2000-08-03 Behr Gmbh & Co Integrierte Sammler-Wärmeübertrager-Baueinheit
FR2897149A1 (fr) * 2006-02-09 2007-08-10 Electricite De France Dispositif echangeur de chaleur destine aux systemes de chauffage ou de climatisation
EP1965164A1 (fr) 2007-02-28 2008-09-03 Atlantic Climatisation et Ventilation Dispositif d'échange de chaleur entre des fluides appartenant à deux circuits
EP2080975A1 (fr) 2008-01-16 2009-07-22 Atlantic Climatisation et Ventilation Dispositif d'échange de chaleur entre des fluides appartenant à deux circuits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5004046A (en) * 1990-06-11 1991-04-02 Thermodynetics, Inc. Heat exchange method and apparatus
DE19903833A1 (de) * 1999-02-01 2000-08-03 Behr Gmbh & Co Integrierte Sammler-Wärmeübertrager-Baueinheit
FR2897149A1 (fr) * 2006-02-09 2007-08-10 Electricite De France Dispositif echangeur de chaleur destine aux systemes de chauffage ou de climatisation
EP1965164A1 (fr) 2007-02-28 2008-09-03 Atlantic Climatisation et Ventilation Dispositif d'échange de chaleur entre des fluides appartenant à deux circuits
EP2080975A1 (fr) 2008-01-16 2009-07-22 Atlantic Climatisation et Ventilation Dispositif d'échange de chaleur entre des fluides appartenant à deux circuits

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