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EP0169689A2 - Infra-red heating system - Google Patents

Infra-red heating system Download PDF

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Publication number
EP0169689A2
EP0169689A2 EP85304968A EP85304968A EP0169689A2 EP 0169689 A2 EP0169689 A2 EP 0169689A2 EP 85304968 A EP85304968 A EP 85304968A EP 85304968 A EP85304968 A EP 85304968A EP 0169689 A2 EP0169689 A2 EP 0169689A2
Authority
EP
European Patent Office
Prior art keywords
pipe
heating
heating system
heating pipe
pipes
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.)
Granted
Application number
EP85304968A
Other languages
German (de)
French (fr)
Other versions
EP0169689B1 (en
EP0169689A3 (en
Inventor
John F. Arnold
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.)
RADIANT SYSTEMS TECHNOLOGY Ltd
Original Assignee
RADIANT SYSTEMS TECHNOLOGY Ltd
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 RADIANT SYSTEMS TECHNOLOGY Ltd filed Critical RADIANT SYSTEMS TECHNOLOGY Ltd
Publication of EP0169689A2 publication Critical patent/EP0169689A2/en
Publication of EP0169689A3 publication Critical patent/EP0169689A3/en
Application granted granted Critical
Publication of EP0169689B1 publication Critical patent/EP0169689B1/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/06Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated
    • F24D5/08Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through radiators

Definitions

  • This invention relates to an infra-red heating system comprising a heating pipe and a plurality of combustion devices spaced apart along the heating pipe for supplying hot gases into the interior of the pipe to cause the pipe to emit infra-red radiation.
  • each combustion device comprises a burner head which is disposed in the flow of gases along the heating pipe. This has a disadvantageous effect on the flow of gases along the pipe.
  • An object of the present invention is to provide an infra-red heating system in which none of the structure of the combustion devices interferes with the flow of hot gases along the heating pipe.
  • an infra red heating system comprising a heating pipe and a plurality of combustion devices spaced apart along the heating pipe and connected in parallel thereto by respective connecting pipes for supplying hot gases to the interior of the heating pipe.
  • the system may include reflector means arranged to be disposed above the heating pipe in use for reflecting heat therefrom downwards, said connecting pipes extending through the reflector means and the reflector means extending between the heating pipe and the combustion devices.
  • each combustion device comprises a burner head which extends into the connecting pipe and which defines therewith an annular gap for introducing carrier air into the system.
  • the inlet to said annular gap is defined between respective radial surfaces connected to the burner head and the connecting pipe, said inlet being adjustable by movement of the burner head axially relative to the connecting pipe.
  • an infra-red heating system 1 comprising a heating pipe 2 and a plurality of combustion devices 3 spaced apart along the heating pipe and connected in parallel thereto by respective connecting pipes 4 for supplying hot gases to the interior of the heating pipe 2.
  • One end 5 of the heating pipe is closed and the other end 6 is connected to a suction means 7, such as a fan or pump, which causes gas flow along the heating pipe.
  • the heating pipe emits infra-red radiant heat from its surface and a reflector means comprising an elongate reflecting element 8 disposed above the heating pipe and along its length reflects heat emitted from the heating pipe downwards.
  • the connecting pipes 4 extend through the reflecting element 8, the latter extending between the heating pipe 2 and the combustion devices 3.
  • the system comprises a single heating pipe and that pipe defines straight-line flow path
  • the heating pipe may define a U-shape flow path, in which case the pipe will comprise two parallel runs each of which is connected to the other at one end only.
  • the heating system may comprise a plurality of heating pipes 2, each having a plurality of combustion devices 3 spaced therealong, the heating pipes being connected in parallel to a common suction means for causing gas flow along the heating pipes.
  • Combustion device 3 comprises a housing 9 which is mounted to one end of the connecting pipe 4 which connects the device 3 to the heating pipe 2.
  • the combustion device comprises a burner head 10 which extends into the connecting pipe 4 and which defines therewith an annular gap 11 for introducing carrier air into the system.
  • the burner head is circular in cross-section and is provided with a plurality of burner ports 12.
  • Within the burner head 10 and a mixing block 13 mounted thereon is defined a mixing chamber 14 for mixing air and gas prior to combustion.
  • the mixing chamber 14 is provided with an air inlet orifice 15 for admitting air from the housing 9 into the mixing chamber 14 and a gas inlet orifice 16 for admitting gas to the chamber 14 from a gas supply line 17 which extends through the housing and includes within the housing a zero governor 18 and a solenoid valve 19 for use in controlling gas flow to the chamber 14.
  • the housing itself is provided with an air inlet 20 and the air admitted into the interior of the housing therethrough forms both the air for combustion and the carrier air.
  • the latter is supplied to the annular gap 11 through an inlet 21 to the annular gap which is defined between respective radial surfaces 22,23 connected to the burner head and connecting pipe.
  • These radial surfaces are provided by a radial flange 24 of the burner head and a facing portion of the housing connected to the end of the connecting pipe.
  • the size of inlet 21 is adjustable by movement of the burner head relative to the connecting pipe to either reduce or increase the spacing apart of the surfaces 22,23.
  • the burner head is mounted in the connecting pipe so as to be movable relative thereto to a selected position.
  • inlet 21 will be determined by the rating of the combustion device and would be preset accordingly during manufacture. Provision for adjusting the size of the inlet during manufacture therefore facilitates manufacture of combustion devices of different ratings.
  • An igniter 25 is mounted downstream of the burner head 10 for igniting the gas/air combustion mixture flowing through the burner ports.
  • the igniter is mounted on the wall of the connecting pipe 4 and extends therethrough.
  • the connecting pipe 4 acts as a 'flame tube' for the combustion device and the flame from the burner head is schematically illustrated at 26.
  • a controller 27 mounted within the housing controls operation of the igniter 25 and solenoid valve 19 in a manner which will be obvious to the man skilled in the art and which needs no further explanation here.
  • a particular advantage of the illustrated combustion device is that the carrier air which is drawn into the connecting pipe 4 around the burner head 10 acts to cool the connecting pipe 4 above the reflector element 8 to avoid loss of radiant heat. If desired the connecting pipe can also be insulated above the reflector element.
  • the structure of the combustion devices including the burner heads thereof is disposed remotely from the interior of the heating pipe and does not interfere with gas flow therealong. Furthermore it will be noted that by connecting the combustion devices in parallel to the heating pipe rather than in series therewith as in the systems disclosed in the patent specifications referred to above, a simpler construction is achieved.

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  • 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)
  • Gas Burners (AREA)

Abstract

An infra-red heating system comprises a heating pipe 2 and a plurality of combustion devices 3 (one only shown) spaced apart along the pipe 2. The combustion devices are connected in parallel to the pipe 2 by respective connecting pipes 4 through which hot gases are supplied to the interior of the pipe 2 to cause the pipe to emit infra-red radiation. The structure of the combustion devices including the burner heads 10 thereof is disposed remotely from the interior of the pipe 2 and does not interfere with gas flow along the pipe 2.

Description

  • This invention relates to an infra-red heating system comprising a heating pipe and a plurality of combustion devices spaced apart along the heating pipe for supplying hot gases into the interior of the pipe to cause the pipe to emit infra-red radiation.
  • Such systems are known from UK Patent Specifications Nos. 1120504, 2070227 and 2102555 to which reference is hereby directed. In the systems disclosed in the above-mentioned specifications each combustion device comprises a burner head which is disposed in the flow of gases along the heating pipe. This has a disadvantageous effect on the flow of gases along the pipe.
  • An object of the present invention is to provide an infra-red heating system in which none of the structure of the combustion devices interferes with the flow of hot gases along the heating pipe.
  • In accordance with the present invention, there is provided an infra red heating system comprising a heating pipe and a plurality of combustion devices spaced apart along the heating pipe and connected in parallel thereto by respective connecting pipes for supplying hot gases to the interior of the heating pipe.
  • The system may include reflector means arranged to be disposed above the heating pipe in use for reflecting heat therefrom downwards, said connecting pipes extending through the reflector means and the reflector means extending between the heating pipe and the combustion devices.
  • Preferably each combustion device comprises a burner head which extends into the connecting pipe and which defines therewith an annular gap for introducing carrier air into the system.
  • Advantageously, the inlet to said annular gap is defined between respective radial surfaces connected to the burner head and the connecting pipe, said inlet being adjustable by movement of the burner head axially relative to the connecting pipe.
  • In order that the invention may be well understood, an embodiment thereof, which is given by way of example only, will now be described, reference being made to the accompanying drawings in which:
    • Figure 1 is a schematic diagram of an infra-red heating system; and
    • Figure 2 is an enlarged vertical cross-section of part of the heating system showing in detail a combustion device thereof.
  • Referring first to Figure 1 there is shown an infra-red heating system 1 comprising a heating pipe 2 and a plurality of combustion devices 3 spaced apart along the heating pipe and connected in parallel thereto by respective connecting pipes 4 for supplying hot gases to the interior of the heating pipe 2. One end 5 of the heating pipe is closed and the other end 6 is connected to a suction means 7, such as a fan or pump, which causes gas flow along the heating pipe. The heating pipe emits infra-red radiant heat from its surface and a reflector means comprising an elongate reflecting element 8 disposed above the heating pipe and along its length reflects heat emitted from the heating pipe downwards. As illustrated, the connecting pipes 4 extend through the reflecting element 8, the latter extending between the heating pipe 2 and the combustion devices 3.
  • Whilst in Figure 1 the system comprises a single heating pipe and that pipe defines straight-line flow path, it will be appreciated that the heating pipe may define a U-shape flow path, in which case the pipe will comprise two parallel runs each of which is connected to the other at one end only. Furthermore, the heating system may comprise a plurality of heating pipes 2, each having a plurality of combustion devices 3 spaced therealong, the heating pipes being connected in parallel to a common suction means for causing gas flow along the heating pipes.
  • The structure of the combustion devices and their connection to the heating pipe will now be described in more detail referring to Figure 2 which shows one such combustion device. The other combustion devices are of identical construction.
  • Combustion device 3 comprises a housing 9 which is mounted to one end of the connecting pipe 4 which connects the device 3 to the heating pipe 2. The combustion device comprises a burner head 10 which extends into the connecting pipe 4 and which defines therewith an annular gap 11 for introducing carrier air into the system. The burner head is circular in cross-section and is provided with a plurality of burner ports 12. Within the burner head 10 and a mixing block 13 mounted thereon is defined a mixing chamber 14 for mixing air and gas prior to combustion. The mixing chamber 14 is provided with an air inlet orifice 15 for admitting air from the housing 9 into the mixing chamber 14 and a gas inlet orifice 16 for admitting gas to the chamber 14 from a gas supply line 17 which extends through the housing and includes within the housing a zero governor 18 and a solenoid valve 19 for use in controlling gas flow to the chamber 14.
  • The housing itself is provided with an air inlet 20 and the air admitted into the interior of the housing therethrough forms both the air for combustion and the carrier air. The latter is supplied to the annular gap 11 through an inlet 21 to the annular gap which is defined between respective radial surfaces 22,23 connected to the burner head and connecting pipe. These radial surfaces are provided by a radial flange 24 of the burner head and a facing portion of the housing connected to the end of the connecting pipe. The size of inlet 21 is adjustable by movement of the burner head relative to the connecting pipe to either reduce or increase the spacing apart of the surfaces 22,23. To this end, the burner head is mounted in the connecting pipe so as to be movable relative thereto to a selected position.
  • It will be appreciated that the size of inlet 21 will be determined by the rating of the combustion device and would be preset accordingly during manufacture. Provision for adjusting the size of the inlet during manufacture therefore facilitates manufacture of combustion devices of different ratings.
  • An igniter 25 is mounted downstream of the burner head 10 for igniting the gas/air combustion mixture flowing through the burner ports. The igniter is mounted on the wall of the connecting pipe 4 and extends therethrough. The connecting pipe 4 acts as a 'flame tube' for the combustion device and the flame from the burner head is schematically illustrated at 26.
  • A controller 27 mounted within the housing controls operation of the igniter 25 and solenoid valve 19 in a manner which will be obvious to the man skilled in the art and which needs no further explanation here.
  • A particular advantage of the illustrated combustion device, is that the carrier air which is drawn into the connecting pipe 4 around the burner head 10 acts to cool the connecting pipe 4 above the reflector element 8 to avoid loss of radiant heat. If desired the connecting pipe can also be insulated above the reflector element.
  • It will be appreciated from the foregoing that the structure of the combustion devices including the burner heads thereof is disposed remotely from the interior of the heating pipe and does not interfere with gas flow therealong. Furthermore it will be noted that by connecting the combustion devices in parallel to the heating pipe rather than in series therewith as in the systems disclosed in the patent specifications referred to above, a simpler construction is achieved.

Claims (8)

1. An infra-red heating system comprising a heating pipe and a plurality of combustion devices spaced apart along the heating pipe and connected in parallel thereto by respective connecting pipes for supplying hot gases to the interior of the heating pipe.
2. A heating system as claimed in claim 1, including reflector means arranged to be disposed above the heating pipe in use for reflecting heat therefrom downwards, said connecting pipes extending through the reflector means and the reflector means extending between the heating pipe and the combustion devices.
3. A heating system as claimed in claim 1 or 2, wherein each combustion device comprises a burner head which extends into the connecting pipe and which defines therewith an annular gap for introducing carrier air into the system.
4. A heating system as claimed in claim 3, wherein the inlet to said annular gap is defined between respective radial surfaces connected to the burner head and the connecting pipe, said inlet being adjustable by movement of the burner head axially relative to the connecting pipe.
5. A heating system as claimed in any one of the preceding claims, comprising a single said heating pipe connected to a suction means for causing gas flow along the pipe.
6. A heating system as claimed in claim 5, wherein said heating pipe defines a straight-line flow path.
7. A heating system as claimed in claim 5, wherein said heating pipe defines a U-shape flow path.
8. A heating system as claimed in any one of claims 1 to 4, comprising a plurality of said heating pipes, each having a plurality of said combustion devices spaced therealong, said heating pipes being connected in parallel to a common suction means for causing gas flow along said pipes.
EP85304968A 1984-07-23 1985-07-11 Infra-red heating system Expired EP0169689B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8418727 1984-07-23
GB08418727A GB2162301B (en) 1984-07-23 1984-07-23 Infra-red heating system

Publications (3)

Publication Number Publication Date
EP0169689A2 true EP0169689A2 (en) 1986-01-29
EP0169689A3 EP0169689A3 (en) 1986-07-16
EP0169689B1 EP0169689B1 (en) 1989-05-17

Family

ID=10564308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85304968A Expired EP0169689B1 (en) 1984-07-23 1985-07-11 Infra-red heating system

Country Status (3)

Country Link
EP (1) EP0169689B1 (en)
DE (1) DE3570279D1 (en)
GB (1) GB2162301B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635675A1 (en) * 1993-07-20 1995-01-25 Ambi-Rad Limited Space heating appliances
WO1997040320A1 (en) * 1996-04-18 1997-10-30 Eric Willms Infrared heating system and metering element
EP0856706A1 (en) * 1997-02-04 1998-08-05 Michael John May Improvements in and relating to radiant tube heaters

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2394019A (en) * 2002-09-20 2004-04-14 Alan Robert Newton Wheel nut locking device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB723437A (en) * 1952-02-12 1955-02-09 Frank Raymond Faber Ramsay Gas or liquid fuel fired heater
US3416512A (en) * 1967-01-09 1968-12-17 Mintz Alvin Infrared heating system
JPS57155004A (en) * 1981-03-20 1982-09-25 Sanree Reinetsu Kk Fuel hole in internal combustion burner of small diameter combustion cylinder
EP0070360A2 (en) * 1981-07-17 1983-01-26 Phoenix Burners Limited A heating system
JPS58200919A (en) * 1982-05-18 1983-11-22 Matsushita Electric Ind Co Ltd Burner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1315685A (en) * 1970-11-13 1973-05-02 Lord Ltd David R Heating apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB723437A (en) * 1952-02-12 1955-02-09 Frank Raymond Faber Ramsay Gas or liquid fuel fired heater
US3416512A (en) * 1967-01-09 1968-12-17 Mintz Alvin Infrared heating system
JPS57155004A (en) * 1981-03-20 1982-09-25 Sanree Reinetsu Kk Fuel hole in internal combustion burner of small diameter combustion cylinder
EP0070360A2 (en) * 1981-07-17 1983-01-26 Phoenix Burners Limited A heating system
JPS58200919A (en) * 1982-05-18 1983-11-22 Matsushita Electric Ind Co Ltd Burner

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 260 (M-180) [1138], 18th December 1982; & JP - A - 57 155 004 (SANREE REINETSU K.K.) 25-09-1982 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 47 (M-280) [1484], 2nd March 1984,; & JP - A - 58 200 919 (MATSUSHITA DENKI SANGYO K.K.) 22-11-1983 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635675A1 (en) * 1993-07-20 1995-01-25 Ambi-Rad Limited Space heating appliances
WO1997040320A1 (en) * 1996-04-18 1997-10-30 Eric Willms Infrared heating system and metering element
EP0856706A1 (en) * 1997-02-04 1998-08-05 Michael John May Improvements in and relating to radiant tube heaters

Also Published As

Publication number Publication date
GB2162301B (en) 1988-02-10
GB8418727D0 (en) 1984-08-30
DE3570279D1 (en) 1989-06-22
GB2162301A (en) 1986-01-29
EP0169689B1 (en) 1989-05-17
EP0169689A3 (en) 1986-07-16

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