GB2187829A - Gas-fired heating appliance - Google Patents

Gas-fired heating appliance Download PDF

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Publication number
GB2187829A
GB2187829A GB08705838A GB8705838A GB2187829A GB 2187829 A GB2187829 A GB 2187829A GB 08705838 A GB08705838 A GB 08705838A GB 8705838 A GB8705838 A GB 8705838A GB 2187829 A GB2187829 A GB 2187829A
Authority
GB
United Kingdom
Prior art keywords
appliance
condensate
heat exchanger
collecting means
gas
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
GB08705838A
Other versions
GB2187829B (en
GB8705838D0 (en
Inventor
Bernard Walsh
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.)
Myson Heating Ltd
Original Assignee
Myson Heating 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 Myson Heating Ltd filed Critical Myson Heating Ltd
Publication of GB8705838D0 publication Critical patent/GB8705838D0/en
Publication of GB2187829A publication Critical patent/GB2187829A/en
Application granted granted Critical
Publication of GB2187829B publication Critical patent/GB2187829B/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F24H8/006Means for removing condensate from the heater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/145Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]

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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)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

A gas-fired water heater includes a combustion chamber (10) containing a condensing heat exchanger (11) and a main heat exchanger (12). Hot combustion gases from a burner (14) pass successively over the main and condensing heat exchangers (12) and (11). Water vapour in the combustion gases condenses on the surface of the condensing heat exchanger (11), and the condensed water is passed from a trough (16) along a pipe (17) to a collecting device (20). A discharge duct 24 and sleeve 26 form a siphon which discharges water in bulk from the collecting device (20) thereby reducing the risk of drain blockage. <IMAGE>

Description

SPECIFICATION Gas-fired heating appliance This invention relates to a gas-fired heating appliance including a component on which a condensate can form, and it relates particularly, though not exclusively, to a gas-fired water heater, for example an instantaneous water heater for domestic use or a central heating boiler.
Water heaters which are intended to operate with relatively high efficiency (in excess of 78%) normally include a secondary (also called condensing) heat exchanger on which a condensate, in the form of droplets of water, can form.
The condensate which is rather acidic (typically a Ph of 3) is collected in a trough and conveyed, via a pipe, to a suitable drain, normally outside the building. Particularly in winter time droplets of water have a tendency to freeze in the pipe, causing a blockage and flooding of the heater casing.
It is an object of the present invention to provide a gas-fired heating appliance which at least alleviates this problem.
Accordingly there is provided a gas-fired heating appliance including a component on which a condensate can form and means to collect condensate formed on said component, the collecting means being arranged to discharge a quantity of condensate in bulk. The appliance may be a gas-fired water heater, said component being a condensing heat exchanger.
It will be understood that a water heater in accordance with this invention embraces both instantaneous water heaters for domestic use and central heating boilers.
A water heater in accordance with the present invention, wherein condensate is discharged in bulk, presents a significantly reduced risk of blockage in a discharge pipe.
In one embodiment the collecting means is arranged to operate in accordance with a siphon action, and may comprise a storage vessel for receiving condensate, a discharge duct extending into the storage vessel from a base wall thereof and an enclosure formed around the discharge duct such that, in use, condensate is admitted to the enclosure via an inlet adjacent said base wall as condensate is being discharged from the enclosure via the discharge duct.
In order that the invention may be carried readily into effect an embodiment thereof is now described, by way of example only, by reference to the accompanying drawings of which: Figure 1 shows, in schematic form, a front view of an instantaneous water heater, Figure 2 shows a cross-sectional view through a collecting device used in the water heater shown in Fig. 1, and Figure 3 is a sectional view of part of Fig.
2.
Referring to Fig. 1 of the drawings, an instantaneous water heater comprises a combustion chamber 10 containing a condensing heat exchanger 11 and a main heat exchanger 12 coupled together in series.
Jn this example, the main heat exchanger includes five passes of copper pipe mounted horizontally, in side-by-side relationship, across an upper part of the combustion chamber. For clarity of illustration only one of the passes is shown in the drawing. The condensing heat exchanger includes six passes of pipe which are mounted at the rear of the combustion chamber substantially in a common plane inclined forwardly at a steep angie to the horizontal. Again, only one of the passes is shown in the drawing. As is well known in the art, all pipes are fitted with cooling fins, shown schematically at F, which assist in the exchange of heat. Cool water received at an inlet I to the water heater is routed directly to the condensing heat exchanger and then to the main heat exchanger.An outlet 0 from the water heater is coupled to the outlet side of the main heat exchanger by means of a coil 13 of pipe which is attached to an exterior surface of the combustion chamber, in good thermal contact therewith. The coil affords an additional exchange of heat and also assists in maintaining the combustion chamber at an acceptably low temperature.
Hot combustion gases produced by a burner 14 rise within the combustion chamber and pass successively over the main heat exchanger 12 and the condensing heat exchanger 11. The gases then pass to atmosphere via an outlet duct 1 5 which may be coupled to a suitable flue.
In operation of the water heater, water vapour in the combustion gases condenses on the relatively cold surfaces of the condensing heat exchanger releasing latent heat of condensation. Water droplets form on the pipes and cooling fins of the heat exchanger and these drip into a trough 16 mounted directly below.
In accordance with this example of the present invention, and in contrast to hitherto known arrangements wherein the water droplets are discharged continuously to a drain, the condensate is passed, by means of a pipe 17, to a collecting device 20 arranged to discharge the condensate in bulk.
As will be seen more clearly in the crosssectional view of Fig. 2, the collecting device 20 is constructed so as to discharge the condensate in accordance with a siphoning action.
The collecting device comprises a generally cylindrical storage vessel 21 provided with a closely fitting lid 22. Condensate is received through an inlet opening 33 in the lid and is discharged via a discharge duct 24 formed integrally with a base 25 of the storage ves sel. The discharge duct extends within the storage vessel, the mouth of the duct being at a preset height above the base 25. The lid is formed with a sleeve 26 which partially surrounds the duct 24 to define an enclosure 27.
When the level in the storage vessel reaches the mouth of the discharge duct condensate spills over and is discharged. This initiates a siphoning action with condensate flowing from the storage vessel into the enclosure via a gap 28 between the sleeve 26 and base 25.
In this manner a quantity of condensate which collects in the storage vessel is discharged in bulk, and this arrangement significantly reduces the risk of a blockage occurring in a drainage system coupled to the discharge duct.
It will be understood that although the invention has been described by reference to a gas-fired water heater, the invention also embraces other forms of gas-fired heating appliance, for example a space heater including a condensing heat exchanger arranged to heat cold air.
Referring to Fig. 3, the pipe 17 passes through a recessed portion of the lid 22 into the storage vessel 21. An O-ring 30 is retained in the lid recess 32 by a metal clip 34 to provide a liquid-tight seal between the pipe 17 and the lid 22.
In the embodiment illustrated in Fig. 1, the collecting device 20 is located immediately beneath the combustion chamber 10. The collecting device 20 may however be located at any convenient position relative to the combustion chamber 10.

Claims (9)

1. A gas fired heating appliance comprising a component on which a condensate can form and means to collect condensate characterised in that the collecting means is arranged to discharge a quantity of condensate in bulk.
2. An appliance as claimed in claim 1 which is a gas-fired water heater.
3. An appliance as claimed in claim 1 or claim 2, wherein the component is a condensing heat exchanger.
4. An appliance as claimed in any preceding claim wherein the collecting means includes a siphon device.
5. An appliance as claimed in claim 4, wherein the collecting means includes a discharge duct extending upwardly from the base of the collecting means to define the head of condensate in the collecting means.
6. An appliance as claimed in claim 5 wherein the collecting means includes a cover, and a sleeve extending downwardly from the cover to surround said discharge duct and be spaced from the base of the collecting means.
7. An appliance as claimed in claim 6 including a pipe to pass the condensate from said component to said collecting means.
8. An appliance as claimed in claim 7 in which said pipe is retained in position by an O-ring seal.
9. An appliance substantially as herein described and shown in the accompanying drawings.
GB8705838A 1986-03-15 1987-03-12 Gas-fired heating appliance Expired GB2187829B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868606458A GB8606458D0 (en) 1986-03-15 1986-03-15 Gas-fired heating appliance

Publications (3)

Publication Number Publication Date
GB8705838D0 GB8705838D0 (en) 1987-04-15
GB2187829A true GB2187829A (en) 1987-09-16
GB2187829B GB2187829B (en) 1989-12-20

Family

ID=10594698

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868606458A Pending GB8606458D0 (en) 1986-03-15 1986-03-15 Gas-fired heating appliance
GB8705838A Expired GB2187829B (en) 1986-03-15 1987-03-12 Gas-fired heating appliance

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868606458A Pending GB8606458D0 (en) 1986-03-15 1986-03-15 Gas-fired heating appliance

Country Status (1)

Country Link
GB (2) GB8606458D0 (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2220469A (en) * 1986-04-18 1990-01-10 British Gas Plc Discharging condensate from gas boilers
GB2290371A (en) * 1994-06-14 1995-12-20 Clive Michael Perry Condensate managing device
WO2006041245A1 (en) * 2004-10-13 2006-04-20 Kyungdong Boiler Co., Ltd. Pipe laying structure of heat exchanger for boiler and hot water supply
GB2433580A (en) * 2005-12-23 2007-06-27 Baxi Spa Device for collecting condensate or rain water within the interior of a gas boiler
CN100443823C (en) * 2005-11-22 2008-12-17 广东万家乐燃气具有限公司 Condensing type water heater condensate water collecting device
WO2009003244A1 (en) * 2007-07-04 2009-01-08 Astral Pool Australia Pty Ltd Water heating apparatus, especially for pools
NL2001267C2 (en) * 2008-02-08 2009-08-11 Atag Verwarming Nederland B V Fluid i.e. drinking water heating device, has burner provided in housing for burning fuel so that hot exhaust gases are produced, and heat exchanger for extracting heat from exhaust gases for heating liquid
CN101726108A (en) * 2008-10-14 2010-06-09 铜联商务咨询(上海)有限公司 Condensing dual-purpose stove for supplying water and heat
CN102384588A (en) * 2011-10-31 2012-03-21 广东万家乐燃气具有限公司 Condensing heat exchanger with inverted-V-shaped structure for gas water heater
CN101639290B (en) * 2009-08-31 2012-12-05 上海申华声学装备有限公司 Flue thermal-arrest energy-saving device of domestic gas water heater
AU2012201782B2 (en) * 2007-07-04 2013-11-07 Fluidra Group Australia Pty Ltd Water heating apparatus, especially for pools
CN104061683A (en) * 2014-06-14 2014-09-24 广东万和新电气股份有限公司 Cast aluminum heat exchanger of gas-fired boiler
CN106500318A (en) * 2016-11-03 2017-03-15 哈尔滨工业大学 A kind of built-in water-fire pipe gas-steam boiler of condenser
CN109579306A (en) * 2018-09-27 2019-04-05 中山市思源电器有限公司 A kind of latent heat recovery type water heater
DE102021127922A1 (en) 2021-10-27 2023-04-27 Vaillant Gmbh Method for operating a heater, computer program, storage medium, regulation and control device, heater and use of a temperature sensor
IT202100028844A1 (en) * 2021-11-12 2023-05-12 Riello Spa CONDENSING BOILER WITH IMPROVED CONDENSATE DISCHARGE CIRCUIT
EP4209712A2 (en) 2022-01-10 2023-07-12 Vaillant GmbH Method for detecting a blocked condensate discharge of a heating device, computer program, control device and heating device
FR3137160A1 (en) * 2022-06-27 2023-12-29 Naval Group INSTALLATION FOR TREATING A GASEOUS HYDROGEN FLOW BY STAGED CATALITIC COMBUSTION
EP4345379A1 (en) 2022-09-29 2024-04-03 Vaillant GmbH Method for starting up a heating device, control and control device, heating device and computer program

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102589128B (en) * 2012-02-07 2017-07-28 海尔集团公司 Double air inlet heat exchanger for condensing gas water heater
CN104110857A (en) * 2014-07-22 2014-10-22 江苏双良锅炉有限公司 Tile type flue gas water-condensing collecting device
CN106482342A (en) * 2016-11-16 2017-03-08 广东万家乐燃气具有限公司 A kind of condensation constant temp gas water heater

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB326845A (en) * 1928-12-21 1930-03-21 Albert John Lambert Improvements in or relating to water heaters and the like
EP0008568A1 (en) * 1978-08-24 1980-03-05 Lennart Bernstein A boiler for heating the heat-transfer medium in a heating system
GB2115122A (en) * 1981-12-23 1983-09-01 Remeha Fabrieken Bv Heating boiler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB326845A (en) * 1928-12-21 1930-03-21 Albert John Lambert Improvements in or relating to water heaters and the like
EP0008568A1 (en) * 1978-08-24 1980-03-05 Lennart Bernstein A boiler for heating the heat-transfer medium in a heating system
GB2115122A (en) * 1981-12-23 1983-09-01 Remeha Fabrieken Bv Heating boiler

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189311B (en) * 1986-04-18 1990-03-21 British Gas Plc Apparatus for discharging condensate from a condensing type gas-fired appliance
GB2220469B (en) * 1986-04-18 1990-04-04 British Gas Plc Apparatus for discharging condensate from a condensing type gas-fired appliance
GB2220469A (en) * 1986-04-18 1990-01-10 British Gas Plc Discharging condensate from gas boilers
GB2290371A (en) * 1994-06-14 1995-12-20 Clive Michael Perry Condensate managing device
WO2006041245A1 (en) * 2004-10-13 2006-04-20 Kyungdong Boiler Co., Ltd. Pipe laying structure of heat exchanger for boiler and hot water supply
CN100443823C (en) * 2005-11-22 2008-12-17 广东万家乐燃气具有限公司 Condensing type water heater condensate water collecting device
GB2433580B (en) * 2005-12-23 2012-01-25 Baxi Spa Device for collecting condensate or rain water within the interior of a gas boiler
GB2433580A (en) * 2005-12-23 2007-06-27 Baxi Spa Device for collecting condensate or rain water within the interior of a gas boiler
AU2012201782B2 (en) * 2007-07-04 2013-11-07 Fluidra Group Australia Pty Ltd Water heating apparatus, especially for pools
AU2008271930B2 (en) * 2007-07-04 2012-03-22 Astral Pool Australia Pty Ltd Water heating apparatus, especially for pools
WO2009003244A1 (en) * 2007-07-04 2009-01-08 Astral Pool Australia Pty Ltd Water heating apparatus, especially for pools
NL2001267C2 (en) * 2008-02-08 2009-08-11 Atag Verwarming Nederland B V Fluid i.e. drinking water heating device, has burner provided in housing for burning fuel so that hot exhaust gases are produced, and heat exchanger for extracting heat from exhaust gases for heating liquid
CN101726108A (en) * 2008-10-14 2010-06-09 铜联商务咨询(上海)有限公司 Condensing dual-purpose stove for supplying water and heat
CN101639290B (en) * 2009-08-31 2012-12-05 上海申华声学装备有限公司 Flue thermal-arrest energy-saving device of domestic gas water heater
CN102384588A (en) * 2011-10-31 2012-03-21 广东万家乐燃气具有限公司 Condensing heat exchanger with inverted-V-shaped structure for gas water heater
CN102384588B (en) * 2011-10-31 2014-07-30 广东万家乐燃气具有限公司 Condensing heat exchanger with inverted-V-shaped structure for gas water heater
CN104061683A (en) * 2014-06-14 2014-09-24 广东万和新电气股份有限公司 Cast aluminum heat exchanger of gas-fired boiler
CN106500318A (en) * 2016-11-03 2017-03-15 哈尔滨工业大学 A kind of built-in water-fire pipe gas-steam boiler of condenser
CN109579306A (en) * 2018-09-27 2019-04-05 中山市思源电器有限公司 A kind of latent heat recovery type water heater
DE102021127922A1 (en) 2021-10-27 2023-04-27 Vaillant Gmbh Method for operating a heater, computer program, storage medium, regulation and control device, heater and use of a temperature sensor
EP4174378A1 (en) 2021-10-27 2023-05-03 Vaillant GmbH Method for operating a heating device, computer program, storage medium, control and control device, heating device and use of a temperature sensor
IT202100028844A1 (en) * 2021-11-12 2023-05-12 Riello Spa CONDENSING BOILER WITH IMPROVED CONDENSATE DISCHARGE CIRCUIT
EP4180740A1 (en) * 2021-11-12 2023-05-17 Riello S.p.A. Condensing boiler with an improved condensate drain circuit
EP4209712A2 (en) 2022-01-10 2023-07-12 Vaillant GmbH Method for detecting a blocked condensate discharge of a heating device, computer program, control device and heating device
DE102022100345A1 (en) 2022-01-10 2023-07-13 Vaillant Gmbh Procedure for detecting a blocked condensate drain of a heating device, computer program, regulation and control device and heating device
FR3137160A1 (en) * 2022-06-27 2023-12-29 Naval Group INSTALLATION FOR TREATING A GASEOUS HYDROGEN FLOW BY STAGED CATALITIC COMBUSTION
WO2024002943A1 (en) * 2022-06-27 2024-01-04 Naval Group Facility for treating a hydrogen gas stream by staged catalytic combustion
EP4345379A1 (en) 2022-09-29 2024-04-03 Vaillant GmbH Method for starting up a heating device, control and control device, heating device and computer program
DE102022125191A1 (en) 2022-09-29 2024-04-04 Vaillant Gmbh Method for commissioning a heater, control and control device, heater and computer program

Also Published As

Publication number Publication date
GB2187829B (en) 1989-12-20
GB8606458D0 (en) 1986-04-23
GB8705838D0 (en) 1987-04-15

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20070311