EP4617583A1 - Application of a service valve in a vacuum-gas heating device, a heating device with this service valve and a method for repeatably controlling the physical conditions of the heating device and repeatably introducing a heating medium into the heating device - Google Patents

Application of a service valve in a vacuum-gas heating device, a heating device with this service valve and a method for repeatably controlling the physical conditions of the heating device and repeatably introducing a heating medium into the heating device

Info

Publication number
EP4617583A1
EP4617583A1 EP25163709.6A EP25163709A EP4617583A1 EP 4617583 A1 EP4617583 A1 EP 4617583A1 EP 25163709 A EP25163709 A EP 25163709A EP 4617583 A1 EP4617583 A1 EP 4617583A1
Authority
EP
European Patent Office
Prior art keywords
heating device
valve
maintenance valve
vacuum
maintenance
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
EP25163709.6A
Other languages
German (de)
French (fr)
Inventor
Boguslaw Kozub
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4617583A1 publication Critical patent/EP4617583A1/en
Pending legal-status Critical Current

Links

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
    • F24H1/0009—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters of the reduced pressure or vacuum steam type
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • 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
    • 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
    • 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
    • F24H1/0018—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using electric energy supply
    • 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
    • F24H9/00—Details
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/025—Check valves

Definitions

  • the subject-matter of the invention comprises a use of a maintenance valve in a vacuum gas heating device, and in particular a heater, a heating device with the said maintenance valve and a method for repeatable monitoring of heating device physical conditions, such as vacuum, and repeatable feeding of liquid heating medium into the heating device.
  • a heater with a throttle valve on the heater which acts as a cooling and high pressure regulator has been disclosed under CN201407727Y .
  • the heater inner niche is filled with vacuum and contains a superconducting liquid.
  • the heat transfer pipe is connected to a heat source.
  • the throttle valve comprises a needle valve located inside the valve, a top cover and a copper tube with an inner sealing ring.
  • the throttle valve outer space is filled with sealant, and one side of the throttle valve top cover is equipped with an external sealing ring.
  • a vacuum gas heater built out of heat exchangers connected with each other, with a heat energy source inside, which heats the heater heating medium has also been disclosed.
  • a conduit located in it in the form of a pipe for feeding liquid heating medium into the heater, i.e. into the heat exchangers.
  • vacuum is generated inside the heat exchangers, which then aspirates the liquid heating medium.
  • the conduit is permanently closed, by bending it for example.
  • the present invention solves this problem by using a maintenance valve according to claim 1 in the gas vacuum heating device, which makes it possible to repeatedly control the heating device physical conditions, and in particular those inside the device and repeatedly feed the heating medium into the heating device.
  • the invention also applies to a gas vacuum heating device with the said maintenance valve and a method for repeatable control of the heating device physical conditions, and repeatable feeding of the heating medium into the heating device.
  • the aim of the invention is a use of a maintenance valve for a vacuum gas heating device, and in particular a heater with a heat energy source, such as an electrical source, induction or a gas source.
  • the vacuum gas heating device comprising at least one heat exchanger for a heating medium, preferably a liquid heating medium, which when heated changes its physical state to a gas, and the heating device comprising a source sub-assembly for producing heat energy distributed via the heating medium.
  • the heating device comprising also a maintenance valve, which constitutes a multi-functional means for, amongst others, repeatable control of physical conditions in the said heating device, and in particular within its heat exchangers, or in other words for controlling the vacuum level and repeatable feeding of the heating medium into it.
  • the multi-functional means is a non-return valve, and in particular a Schrader valve.
  • the maintenance valve is attached to the heating device whereby it is connected directly or indirectly to the heating device.
  • the connection may be a threaded connection. If the connection is indirect, then the maintenance valve is located in an indirect measure, preferably in the form of a sleeve, screwed into the opening in the heating device so that the sleeve with the non-return valve is at least partially enclosed in the vacuum gas heating device.
  • the heat exchanger opening for the maintenance valve also features a threaded surface for connecting to the maintenance valve housing threaded surface or the opening features a threaded surface for connecting to the sleeve threaded surface.
  • the method for repeatable control of physical conditions, in particular the vacuum level, and repeatable feeding of liquid heating medium into the vacuum gas heating device comprises the following stages:
  • the liquid heating medium in particular liquid gas
  • the maintenance valve is attached in the heating device via an indirect measure, in particular a threaded sleeve, so that after installing the maintenance valve in the heating device with the sleeve, the maintenance valve together with the sleeve are at least partially inside the heat exchanger, so that only a part of the maintenance valve required to connect it to the vacuum pump control apparatus conduit tip is visible on the outside.
  • the maintenance valve used in the vacuum gas heating device allows for repeatable control of vacuum in the heating device, both during initial filling the device with heating medium and after it has been filled with a liquid heating medium, when the vacuum level may change. Vacuum level and correct quantity of liquid medium in the heating device promote high heating device efficiency. Therefore, use of a maintenance valve in heating devices makes it possible to automate the method for generating vacuum and filling the device with liquid heating medium, which in turn translates into more economic and efficient production. Furthermore, the maintenance valve is entirely tight and resistant to high temperatures, and as such it may be powder coated in a colour matching a heating device colour, and in particular of a designer heater.
  • the invention pertains to use, in a vacuum gas heating device, in the embodiment comprising a vacuum gas heater 1 with an electric power source for a heating element comprising a source of heat energy.
  • the heater comprising a heat exchangers 11 for a liquid heating medium in the form of liquid gas.
  • Schrader valve 21 also features an at least partially threaded housing, so that the connection between sleeve 22 and Schrader valve 21 is also a threaded connection.
  • any type of connection is feasible.
  • a Schrader valve contains core 211 for controlled opening and closing of the valve, and the said core is enclosed in valve sleeve 212. Once core 211, flush with a spring in the valve sleeve, has been pressed, the Schrader valve opens, whereas in its resting position, the Schrader valve is closed. Core 211 is covered by cap 23.
  • the method for repeatable control of physical conditions and repeatable feeding of liquid heating medium into vacuum gas heating device 1 using maintenance valve 2 comprises the following stages:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Valves (AREA)

Abstract

The subject-matter of the invention is the use of maintenance valve (2) for vacuum gas heating device (1) characterized in the said maintenance valve (2) is a multi-functional means for, amongst others, repeatable control of physical conditions in the said heating device and repeatable feeding of liquid heating medium to it, vacuum gas heating device with the said maintenance valve and method for repeatable control of physical conditions and repeatable feeding of heating medium to vacuum gas heating device (1).

Description

  • The subject-matter of the invention comprises a use of a maintenance valve in a vacuum gas heating device, and in particular a heater, a heating device with the said maintenance valve and a method for repeatable monitoring of heating device physical conditions, such as vacuum, and repeatable feeding of liquid heating medium into the heating device.
  • A heater with a throttle valve on the heater which acts as a cooling and high pressure regulator has been disclosed under CN201407727Y . The heater inner niche is filled with vacuum and contains a superconducting liquid. In the lower part of the heater there is a pipe for transporting hot water, which heats the superconducting liquid causing a change to its physical state. The heat transfer pipe is connected to a heat source. The throttle valve comprises a needle valve located inside the valve, a top cover and a copper tube with an inner sealing ring. The throttle valve outer space is filled with sealant, and one side of the throttle valve top cover is equipped with an external sealing ring.
  • An electric gas vacuum heating panel with the medium heated using a thermistoric heating element powered from the electricity grid featuring a top and a bottom heat exchanger, connected to each other via a series of vertical heat exchangers, which is characteristic because the hermetic vacuum insides of the connected heat exchangers (1, 2 and 3) is filled with a medium in the form of dodecafluoro-2-methylpentan-3-one/perfluoro (ethyl isopropyl ketone)/ Fluoroketone FK-5-1-12 (CF3CF2C(O)CF(CF3)2), has been disclosed under PL242532B1 .
  • A vacuum gas heater built out of heat exchangers connected with each other, with a heat energy source inside, which heats the heater heating medium has also been disclosed. There is an opening in the heater with a conduit located in it, in the form of a pipe for feeding liquid heating medium into the heater, i.e. into the heat exchangers. Before feeding the liquid heating medium, vacuum is generated inside the heat exchangers, which then aspirates the liquid heating medium. Following this, the conduit is permanently closed, by bending it for example.
  • In the disclosed solutions, a re-fill of the heater with the heating medium and adjustment of the vacuum conditions is difficult due to the permanent closure of the feed conduit, and in the solutions with the stop valve, the stop valve is not used to feed the heating medium. The present invention solves this problem by using a maintenance valve according to claim 1 in the gas vacuum heating device, which makes it possible to repeatedly control the heating device physical conditions, and in particular those inside the device and repeatedly feed the heating medium into the heating device. The invention also applies to a gas vacuum heating device with the said maintenance valve and a method for repeatable control of the heating device physical conditions, and repeatable feeding of the heating medium into the heating device.
  • The aim of the invention is a use of a maintenance valve for a vacuum gas heating device, and in particular a heater with a heat energy source, such as an electrical source, induction or a gas source. The vacuum gas heating device comprising at least one heat exchanger for a heating medium, preferably a liquid heating medium, which when heated changes its physical state to a gas, and the heating device comprising a source sub-assembly for producing heat energy distributed via the heating medium. The heating device comprising also a maintenance valve, which constitutes a multi-functional means for, amongst others, repeatable control of physical conditions in the said heating device, and in particular within its heat exchangers, or in other words for controlling the vacuum level and repeatable feeding of the heating medium into it. The multi-functional means is a non-return valve, and in particular a Schrader valve. The maintenance valve is attached to the heating device whereby it is connected directly or indirectly to the heating device. The connection may be a threaded connection. If the connection is indirect, then the maintenance valve is located in an indirect measure, preferably in the form of a sleeve, screwed into the opening in the heating device so that the sleeve with the non-return valve is at least partially enclosed in the vacuum gas heating device. The heat exchanger opening for the maintenance valve also features a threaded surface for connecting to the maintenance valve housing threaded surface or the opening features a threaded surface for connecting to the sleeve threaded surface.
  • The method for repeatable control of physical conditions, in particular the vacuum level, and repeatable feeding of liquid heating medium into the vacuum gas heating device comprises the following stages:
    • attaching the maintenance valve in the vacuum gas heating device opening, wherein following attachment the maintenance valve is in closed position,
    • opening the maintenance valve by connecting it to a conduit tip connecting the vacuum pump control apparatus, and generating vacuum conditions in the device heat exchanger,
    • switching the vacuum pump control apparatus function to heating medium feed through the maintenance valve into the vacuum gas heating device,
    • closing the maintenance valve by disconnecting the conduit tip from the maintenance valve. Each stage is repeatable in above following order.
  • The liquid heating medium, in particular liquid gas, is fed into the heating device in a liquid state, and after activation of a source sub-assembly which generates heat energy, the heating medium transitions into gas and fills the heat exchangers. The maintenance valve is attached in the heating device via an indirect measure, in particular a threaded sleeve, so that after installing the maintenance valve in the heating device with the sleeve, the maintenance valve together with the sleeve are at least partially inside the heat exchanger, so that only a part of the maintenance valve required to connect it to the vacuum pump control apparatus conduit tip is visible on the outside.
  • The maintenance valve used in the vacuum gas heating device allows for repeatable control of vacuum in the heating device, both during initial filling the device with heating medium and after it has been filled with a liquid heating medium, when the vacuum level may change. Vacuum level and correct quantity of liquid medium in the heating device promote high heating device efficiency. Therefore, use of a maintenance valve in heating devices makes it possible to automate the method for generating vacuum and filling the device with liquid heating medium, which in turn translates into more economic and efficient production. Furthermore, the maintenance valve is entirely tight and resistant to high temperatures, and as such it may be powder coated in a colour matching a heating device colour, and in particular of a designer heater.
  • The invention is depicted on the diagram below, with given figures showing the following:
    • Fig. 1. maintenance valve in a heating device comprising a vacuum gas heater,
    • Fig. 2. maintenance valve in an indirect measure in the form of a sleeve,
    • Fig. 3. expanded view of maintenance valve comprising a Schrader valve and sleeve.
  • The invention pertains to use, in a vacuum gas heating device, in the embodiment comprising a vacuum gas heater 1 with an electric power source for a heating element comprising a source of heat energy. The heater comprising a heat exchangers 11 for a liquid heating medium in the form of liquid gas. In one heat exchanger 11 there is threaded hole 12 for maintenance valve 2 in the embodiment comprising Schrader valve 21 in sleeve 22. As sleeve 22 has an external threaded surface, together with Schrader valve 21 it is screwed into heat exchanger 11 threaded hole 12. Schrader valve 21 also features an at least partially threaded housing, so that the connection between sleeve 22 and Schrader valve 21 is also a threaded connection. However, any type of connection is feasible. As standard a Schrader valve contains core 211 for controlled opening and closing of the valve, and the said core is enclosed in valve sleeve 212. Once core 211, flush with a spring in the valve sleeve, has been pressed, the Schrader valve opens, whereas in its resting position, the Schrader valve is closed. Core 211 is covered by cap 23. The method for repeatable control of physical conditions and repeatable feeding of liquid heating medium into vacuum gas heating device 1 using maintenance valve 2 comprises the following stages:
    • attaching maintenance valve 2 in vacuum gas heating device 1 opening 2, wherein following attachment the maintenance valve is closed and it comprises a Schrader non-return valve 21,
    • opening maintenance valve 2 by connecting it to a conduit tip connecting the vacuum pump control apparatus, and generating vacuum conditions in device heat exchanger 11,
    • switching the vacuum pump control apparatus function to liquid heating medium feed through the maintenance valve into vacuum gas heating device 1,
    • closing maintenance valve 2 by disconnecting the conduit tip from the maintenance valve and covering Schrader valve 21 valve core 211 with cap 23. Each stage is repeatable. The heating medium is fed to heating device 1 in a liquid state, and after activation of a source sub-assembly which generates heat energy, the heating medium transitions into gas and fills the heat exchangers.

Claims (15)

  1. Use of a maintenance valve (2) for a vacuum gas heating device (1) characterized in that the maintenance valve (2) is a multi-functional means for, amongst others, repeatable control of physical conditions in said heating device and repeatable feeding of a heating medium into the heating device.
  2. Use according to claim 1 characterized in that the multi-functional means is a non-return valve (21) attached to the heating device (1).
  3. Use according to claim 1 or 2 characterized in that non-return valve (21) is directly connected to the vacuum gas heating device (1).
  4. Use according to claim 1 or 2 characterized in that non-return valve (21) is indirectly connected to the vacuum gas heating device (1).
  5. Use according to claim 1 or 2, or 3, or 4 characterized in that the connection between the non-return valve (21) and the vacuum gas heating device (1) is a threaded connection.
  6. Use according to claim 1 or 2, or 4, or 5 characterized in that it comprises an indirect measure, in particular sleeve (22), so that the non-return valve (21) is seated in the sleeve (22), via which the non-return valve (21) is connected to the heating device (1) and preferably the sleeve (22) with the non-return valve (21) is at least partially enclosed in vacuum gas heating device (1).
  7. Use according to claim 1 or 2, or 3, or 4, or 5, or 6 characterized in that the non-return valve is a Schrader valve (21).
  8. The vacuum gas heating device comprising at least one heat exchanger (11) for a heating medium, preferably a liquid gas, where said heating medium is arranged to change its state to gas when subjected to heat, and the heating device comprising a source sub-assembly for generating a heat energy, distributed by the heating medium in the heating device, characterized in that the heating device comprising the maintenance valve (2) according to claims 1-7, for repeatable control of physical conditions in the said heating device and repeatable feeding of the heating medium into the heating device.
  9. The heating device according to claim 8 characterized in that the vacuum gas heating device (1) comprising an opening (12) for maintenance valve (2).
  10. The heating device according to claim 8 or 9 characterized in that the opening (12) comprising a threaded surface for connecting to the maintenance valve (2) threaded surface.
  11. The device according to claim 8 or 9, or 10 characterized in that the source sub-assembly is any source of heat energy, in particular is a heating element connected to an electric energy source, or induction, or a gas burner.
  12. The method for repeatable control of physical conditions and repeatable feeding of heating medium to vacuum gas heating device (1) according to claims 8-11 via the maintenance valve (2) according to use in claims 1-7 comprises the following stages:
    - attaching the maintenance valve (2) in the vacuum gas heating device opening (12), wherein following attachment the maintenance the maintenance valve (2) is closed,
    - opening maintenance valve (2) by connecting it to a conduit tip connecting a vacuum pump control apparatus, and generating vacuum conditions in the heating device, particularly the heat exchanger,
    - switching the vacuum pump control apparatus function to the liquid heating medium feed via the maintenance valve into the vacuum gas heating device,
    - closing the maintenance valve (2) by disconnecting the conduit tip from the maintenance valve.
  13. The method according to claim 12 characterized in that each of the stages is repeatable.
  14. The method according to claims 12 or 13 characterized in that the liquid heating medium is fed into the heating device in a liquid state, and following activation of source sub-assembly which generates heat energy, the heating medium transitions to gas, filling the heat exchangers.
  15. The method according to claims 12 or 13, or 14 characterized in that the maintenance valve (2) is attached in vacuum gas heating device (1) via an indirect measure, in particular the sleeve (22) threaded so that following installation of the maintenance valve (2) in heating device with the sleeve (22) the maintenance valve together with sleeve (22) is at least partially inside heat exchanger (11), so that only part of maintenance valve (2) required to connect to vacuum pump control apparatus conduit tip is visible on the outside, in particular covered by cap (23).
EP25163709.6A 2024-03-15 2025-03-14 Application of a service valve in a vacuum-gas heating device, a heating device with this service valve and a method for repeatably controlling the physical conditions of the heating device and repeatably introducing a heating medium into the heating device Pending EP4617583A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL448021A PL448021A1 (en) 2024-03-15 2024-03-15 Application of a service valve in a vacuum-gas heating device, a heating device with this service valve and a method for repetitively controlling the physical conditions of the heating device and repetitively introducing a heating medium into the heating device

Publications (1)

Publication Number Publication Date
EP4617583A1 true EP4617583A1 (en) 2025-09-17

Family

ID=96807302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP25163709.6A Pending EP4617583A1 (en) 2024-03-15 2025-03-14 Application of a service valve in a vacuum-gas heating device, a heating device with this service valve and a method for repeatably controlling the physical conditions of the heating device and repeatably introducing a heating medium into the heating device

Country Status (2)

Country Link
EP (1) EP4617583A1 (en)
PL (1) PL448021A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271835A (en) * 1992-10-24 1994-04-27 Imi Range Ltd Unvented storage waterheaters
US5721804A (en) * 1995-10-12 1998-02-24 Heatech International, Inc. Y-shaped portable electric space heater with value to reduce pressure within the boiler
ES2230949B1 (en) * 2002-07-03 2006-05-01 Electroetxea, S.L. PROCEDURE AND INSTALLATION TO FILL RADIATORS WITH CALOPORTING FLUID.
KR100687541B1 (en) * 2005-10-10 2007-03-02 최정관 Heat pipe manufacturing method and heat pipe
CN201407727Y (en) 2009-05-08 2010-02-17 茆广宇 Vacuum superconducting heater
GB2525203A (en) * 2014-04-15 2015-10-21 Pa Knowledge Ltd Radiator
PL242532B1 (en) 2021-01-21 2023-03-06 Inneftech Group Spolka Z Ograniczona Odpowiedzialnoscia Gas-vacuum electric heating panel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0552453A (en) * 1991-08-26 1993-03-02 Sanyo Electric Co Ltd Air bleeding method for engine-driven heat pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271835A (en) * 1992-10-24 1994-04-27 Imi Range Ltd Unvented storage waterheaters
US5721804A (en) * 1995-10-12 1998-02-24 Heatech International, Inc. Y-shaped portable electric space heater with value to reduce pressure within the boiler
ES2230949B1 (en) * 2002-07-03 2006-05-01 Electroetxea, S.L. PROCEDURE AND INSTALLATION TO FILL RADIATORS WITH CALOPORTING FLUID.
KR100687541B1 (en) * 2005-10-10 2007-03-02 최정관 Heat pipe manufacturing method and heat pipe
CN201407727Y (en) 2009-05-08 2010-02-17 茆广宇 Vacuum superconducting heater
GB2525203A (en) * 2014-04-15 2015-10-21 Pa Knowledge Ltd Radiator
PL242532B1 (en) 2021-01-21 2023-03-06 Inneftech Group Spolka Z Ograniczona Odpowiedzialnoscia Gas-vacuum electric heating panel

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