EP4215823B1 - Appareil d'expansion - Google Patents

Appareil d'expansion

Info

Publication number
EP4215823B1
EP4215823B1 EP23152192.3A EP23152192A EP4215823B1 EP 4215823 B1 EP4215823 B1 EP 4215823B1 EP 23152192 A EP23152192 A EP 23152192A EP 4215823 B1 EP4215823 B1 EP 4215823B1
Authority
EP
European Patent Office
Prior art keywords
membrane
fluid
expansion apparatus
expansion
sheath
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.)
Active
Application number
EP23152192.3A
Other languages
German (de)
English (en)
Other versions
EP4215823A1 (fr
Inventor
Mehmet Serhan KILIÇ
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
Publication of EP4215823A1 publication Critical patent/EP4215823A1/fr
Application granted granted Critical
Publication of EP4215823B1 publication Critical patent/EP4215823B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
    • F24D3/1016—Tanks having a bladder

Definitions

  • the present invention relates to an expansion apparatus that prevents the increase of the closed-circuit installation pressure by balancing the expansion of the heated fluid in the installations through which a heated fluid is flowing.
  • the invention discloses an expansion apparatus comprising at least one fluid inlet and a flexible membrane in which the fluid is filled through this fluid inlet and is directly subject to atmospheric pressure.
  • Open expansion vessels are the oldest technique that is used for this purpose. As the technology evolved, this technique was replaced by closed expansion tanks.
  • Current closed expansion tanks comprise a metal surface, expandable membrane, and an air section that paddings this membrane. Air section is the volume between metal surface and membrane.
  • Water on the system expands after heating and thus its volume increases.
  • the expanded water enters the expansion tank and system pressure is reduced. In the meantime, it compresses the air inside the expansion tank.
  • water in the installation cools down, water volume and pressure decrease.
  • compressed air inside the tank sends the water inside the system back to installation and adjust system pressure to a fixed level.
  • Expansion valves that currently used contain a metal container with expandable membrane and a padding air section thus they are both heavy and has big volumes. Also, due to the metal surface, they have a fixed structure. For this reason, it does not have flexibility and cannot be produced in geometries that cannot be made with a deep drawing die.
  • an expansion tank which is equipped with an elastic diagram that divides it into an air chamber and a water chamber in the middle. Furthermore, air pressure inside the air chamber is measured by a sensor, and air is supplied with the compressor instead of the missing air.
  • Another aim of the invention is to provide an expansion apparatus that performs the function of elements such as pipes that transport water in a closed circuit and does not require additional maintenance.
  • present invention is an expansion apparatus according to claim 1 for reducing pressure increase in closed-circuit fluid systems.
  • the expansion apparatus comprises at least one fluid inlet, and a membrane in flexible form directly subject to atmospheric pressure, in which the fluid is filled by means of the fluid inlet.
  • the expansion apparatus further comprises a sheath structured to cover the membrane and whose volume can change in proportion to the pressure change to which the membrane is subjected.
  • the sheath preferably is made of air-permeable material.
  • FIG. 3a and 3b section view of a preferred embodiment of expansion apparatus (1) is shown schematically.
  • the expansion apparatus (1) of the preferred embodiment comprises a membrane in flexible form (2), a fluid inlet (3) in which fluid enters from closed-circuit fluid system, a sheath (4) that protects the membrane (2) from foreign unwanted substances particles such as dust.
  • This sheath (4) is configured to in a way to cover the membrane (2), and its volume is able to change in proportion to the pressure change to which the membrane (2) is subjected.
  • Sheath (4) serves as a second layer for the purpose of blocking physical contact of foreign materials like dust with membrane (2).
  • the sheath (4) has a structure that is stretched in the bulky state of the membrane (2) and crumpled when it is deflated.
  • the cover (4) has a certain strength that will both protect the membrane (2) from foreign substances and prevent it from further swelling with pressure.
  • the material of the sheath (4) is selected from a material that is air-permeable, which will not prevent the membrane (2) from being directly subjected to atmospheric pressure.
  • expansion apparatus (1) comprises
  • an air gap unconnected with outside and isolated is not available in between membrane (2) and sheath (4), by which are constituted expansion apparatus (1).
  • the membrane (2) is expected to have at least 2-4 mm of thickness, and sheath (4) is envisaged to have at least 1 mm thickness.
  • the thickness values of membrane (2) and sheath (4) depend on the type of the material and amount of internal pressure inside the fluid system that expansion apparatus (1) to be connected to.
  • expansion apparatus (1) Since atmospheric air is the padding for the expansion apparatus (1), it is not necessary to have closed space for the expansion. This way expansion apparatus (1) saves volume in boilers and tanks. Also, there is no demand for necessities like filling of padding air, supplying air in case of leakage, and comprising a relief valve connection.

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)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Pipe Accessories (AREA)

Claims (4)

  1. Appareil de dilatation (1) permettant de réduire l'augmentation de la pression dans les systèmes de fluides en circuit fermé, l'appareil comprenant :
    - au moins une entrée de fluide (3), et
    - une membrane (2) de forme souple directement soumise à la pression atmosphérique, dans laquelle le fluide est introduit par l'entrée de fluide (3) ;
    caractérisé en ce que, l'appareil comprend en outre une gaine (4) structurée pour recouvrir la membrane (2) et dont le volume peut changer proportionnellement à la variation de pression à laquelle la membrane (2) est soumise.
  2. Appareil de dilatation (1) selon la revendication 1, dans lequel la membrane (2) est constituée d'un matériau élastomère.
  3. Appareil de dilatation (1) selon la revendication 1 ou 2, dans lequel la gaine (4) est constituée d'un matériau perméable à l'air.
  4. Appareil de dilatation (1) selon l'une quelconque des revendications 1 à 3, dans lequel l'appareil de dilatation comprend au moins une sortie de fluide (5) en liaison avec la membrane (2) permettant à l'appareil de dilatation (1) d'être monté en série sur le système de fluide en circuit fermé et permettant au fluide dans ladite membrane (2) d'être évacué de l'appareil de dilatation (1).
EP23152192.3A 2022-01-20 2023-01-18 Appareil d'expansion Active EP4215823B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR202200696 2022-01-20

Publications (2)

Publication Number Publication Date
EP4215823A1 EP4215823A1 (fr) 2023-07-26
EP4215823B1 true EP4215823B1 (fr) 2025-10-01

Family

ID=84982202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23152192.3A Active EP4215823B1 (fr) 2022-01-20 2023-01-18 Appareil d'expansion

Country Status (1)

Country Link
EP (1) EP4215823B1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7306849A (fr) * 1973-05-16 1974-11-19
GB8603359D0 (en) * 1986-02-11 1986-03-19 Pressure Units Ltd Central heating system
US6418969B1 (en) * 2000-11-08 2002-07-16 Watts Regulator Co. In-line thermal expansion tank
CN102691850A (zh) * 2012-05-30 2012-09-26 张秀英 一种密闭液循环回路的容积调节器
CN102864818A (zh) 2012-10-13 2013-01-09 温岭市联华机械有限公司 一种膨胀罐
CN208293200U (zh) 2018-01-03 2018-12-28 东莞润信弹性织物有限公司 一种拉伸变形的网状织带

Also Published As

Publication number Publication date
EP4215823A1 (fr) 2023-07-26

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