EP0262263B1 - An air heating apparatus - Google Patents
An air heating apparatus Download PDFInfo
- Publication number
- EP0262263B1 EP0262263B1 EP86201715A EP86201715A EP0262263B1 EP 0262263 B1 EP0262263 B1 EP 0262263B1 EP 86201715 A EP86201715 A EP 86201715A EP 86201715 A EP86201715 A EP 86201715A EP 0262263 B1 EP0262263 B1 EP 0262263B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reservoir
- water
- air
- housing
- heating
- 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.)
- Expired - Lifetime
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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
- F24H6/00—Combined water and air heaters
Definitions
- the present invention relates to an apparatus for heating air, comprising a substantially cylindrical housing, means for conducting air to be heated through the housing and means for heating such air, said latter means comprising a hot-water reservoir arranged through the major part of the length of the housing, said reservoir including a supply and a discharge pipe, and a gas burner for heating the water in said reservoir, the outer wall of the hot-water reservoir being formed by a cylinder, said cylinder and the inner wall of the substantially cylindrical housing defining between them an annular space through which the air to be heated can be conducted, in the hot-water reservoir being comprised a central cylinder, concentric with the cylindrical outer wall, the gas burner being located at the bottom of said central cylinder, so that combustion gases may be discharged through said central cylinder.
- the known apparatus comprises a hot-water reservoir of the boiler type, that is a reservoir that has a rather large water storage capacity.
- the object set is achieved according to the present invention with an apparatus in which the ratio of the outside diameter of the hot-water reservoir to its length is between 1:3 to 1:30, the heat supply and construction being such that when water is being drained off from the reservoir, even during a prolonged period of time, the heating of freshly supplied water keeps pace therewith.
- a hot-water supply is integrated in the hot-air heating system.
- the air is heated via the hot-water reservoir, which as it were serves as a thermal storage.
- the hot-water reservoir in the apparatus according to the present invention should have a slender form in order to ensure optimum heating of the air at a low water capacity.
- a diameter-to-length ratio of 1:3 is a minimum condition therefor.
- a low water capacity is required to avoid, as is the case sometimes with conventional storage vessels, boilers and the like, that a large water supply is kept unnecessarily at the required temperature.
- a small reservoir with a heat supply by means of a gas burner, such that when water is being drained off from the reservoir, even during a prolonged period, e.g. for filling a bath, the heating of freshly supplied water, keeps pace therewith, results in a highly economical construction.
- the annular, cylindrical water reservoir forms a buffer between the combustion space and the space through which the air to be heated is passed.
- the embodiment of the apparatus according to the present invention shown in the drawing comprises a substantially cylindrical housing 1.
- the wall of the housing 1 consists of a thermally insulating material or of two thin cylinders of sheet metal between which there is sandwiched a thermally insulating material, such as glass wool or the like.
- Housing 1 is covered at its top by a cover 2, consisting e.g. of the same material, or built up similarly to the cylindrical housing 1.
- Housing 1 accommodates an annular, cylindrical hot-water reservoir 3 extending throughout the major part of the length of housing 1, e.g. from cover 2 as far as some distance from the underside of housing 1.
- Reservoir 3 is formed essentially by two concentric metal cylinders 4,5, cylinder 4 of smaller diameter forming the inner wall of reservoir 3 and cylinder 5 of larger diameter forming the outer wall.
- a space 6 serving as a discharge pipe for combustion gases.
- a gas burner 7 fed through a gas pipe 8, which is suitably passed through the wall of housing 1 or which is connected to an external gas pipe through the lower end of housing 1.
- Space 6 for combustion and subsequent discharge of combustion gases is connected to a pipe 9 passed through the cover 2 of housing 1, which pipe 9 may incorporate a damper 10.
- Pipe 9 may continue downwardly to adjacent burner 7, in which case pipe 9 closely contacts the inner wall 4 of reservoir 3, to ensure a good heat transfer to the water contained in reservoir 3.
- a cold-water supply-pipe 11 which is passed through the wall of housing 1 in a suitable manner, while at the top of reservoir 3, a hot-water discharge-pipe 12 connects thereto, said pipe 12 being passed e.g. through cover 2.
- annular space 13 Between the outer wall 5 of reservoir 3 and the inner wall of housing 1, there is provided an annular space 13 through which air to be heated in the housing can be passed.
- the air to be heated is drawn in through suitable openings 14 in the wall of the housing 1 near its top end.
- the intake of air and its movement through space 13 may be effected e.g. by means of a blower 15 disposed at the bottom of housing 1.
- a dust filter 16 may be arranged at the bottom of housing 1 above blower 15.
- Housing 1 is attached, in any suitable manner, to the floor 17 of a building to be heated.
- the bottom of housing 1 is open and connects to a channel 18 provided in floor 17 for further transport and distribution of air heated in the apparatus.
- the water in reservoir 3 is heated by means of gas burner 7.
- the air sucked in through openings 14 and subsequently transported through the apparatus is heated by contact with wall 5 of reservoir 3. Because the air is not heated directly by burner 7, a uniform heat supply is possible.
- the diameter of space 6, approximately equal to the inside diameter of reservoir 3 is 12.5 cm.
- the diameter of the outer jacket 5 of reservoir 3 is 25 cm.
- the diameter of housing 1 is 50 cm at the exterior and 35 cm internally.
- the height of housing 1 as far as the top of cover 2 is 175 cm and the height of reservoir 3 is about 145 cm.
- the openings 14 are such that with the given dimensions of space 13, fan 15 transports about 250 m3 of air per hour through the apparatus.
- the apparatus is further provided with known per se means, not shown, for regulating the temperature of the water in reservoir 3 and for operating gas burner 7 and blower 15 in dependence on the desired functioning.
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)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Drying Of Solid Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Resistance Heating (AREA)
- Electrostatic Separation (AREA)
- Details Of Fluid Heaters (AREA)
- Air Humidification (AREA)
- Cookers (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
Description
- The present invention relates to an apparatus for heating air, comprising a substantially cylindrical housing, means for conducting air to be heated through the housing and means for heating such air, said latter means comprising a hot-water reservoir arranged through the major part of the length of the housing, said reservoir including a supply and a discharge pipe, and a gas burner for heating the water in said reservoir, the outer wall of the hot-water reservoir being formed by a cylinder, said cylinder and the inner wall of the substantially cylindrical housing defining between them an annular space through which the air to be heated can be conducted, in the hot-water reservoir being comprised a central cylinder, concentric with the cylindrical outer wall, the gas burner being located at the bottom of said central cylinder, so that combustion gases may be discharged through said central cylinder.
- An apparatus of this type is disclosed in DE-A 2 550 014. The known apparatus comprises a hot-water reservoir of the boiler type, that is a reservoir that has a rather large water storage capacity.
- It is an object of the present invention to provide an economically constructed apparatus which is adapted to effect a uniform supply for heated air to the surroundings. The object set is achieved according to the present invention with an apparatus in which the ratio of the outside diameter of the hot-water reservoir to its length is between 1:3 to 1:30, the heat supply and construction being such that when water is being drained off from the reservoir, even during a prolonged period of time, the heating of freshly supplied water keeps pace therewith.
- In the apparatus according to the present invention, a hot-water supply is integrated in the hot-air heating system. The air is heated via the hot-water reservoir, which as it were serves as a thermal storage. This makes for a quiet control behaviour and realizes highly uniform heating. The hot-water reservoir in the apparatus according to the present invention should have a slender form in order to ensure optimum heating of the air at a low water capacity. A diameter-to-length ratio of 1:3 is a minimum condition therefor. A low water capacity is required to avoid, as is the case sometimes with conventional storage vessels, boilers and the like, that a large water supply is kept unnecessarily at the required temperature. A small reservoir with a heat supply, by means of a gas burner, such that when water is being drained off from the reservoir, even during a prolonged period, e.g. for filling a bath, the heating of freshly supplied water, keeps pace therewith, results in a highly economical construction.
- In the apparatus according to the invention the annular, cylindrical water reservoir forms a buffer between the combustion space and the space through which the air to be heated is passed.
- An embodiment of the apparatus according to the present invention will now be described, by way of example, with reference to the accompanying drawing in which such embodiment is illustrated in cross-sectional view.
- The embodiment of the apparatus according to the present invention shown in the drawing comprises a substantially cylindrical housing 1. The wall of the housing 1 consists of a thermally insulating material or of two thin cylinders of sheet metal between which there is sandwiched a thermally insulating material, such as glass wool or the like. Housing 1 is covered at its top by a
cover 2, consisting e.g. of the same material, or built up similarly to the cylindrical housing 1. Housing 1 accommodates an annular, cylindrical hot-water reservoir 3 extending throughout the major part of the length of housing 1, e.g. fromcover 2 as far as some distance from the underside of housing 1.Reservoir 3 is formed essentially by twoconcentric metal cylinders cylinder 4 of smaller diameter forming the inner wall ofreservoir 3 andcylinder 5 of larger diameter forming the outer wall. - Within
cylinder 4, forming the inner wall ofreservoir 3, there is provided aspace 6 serving as a discharge pipe for combustion gases. At the bottom ofspace 6, near the lower end ofreservoir 3, there is arranged agas burner 7 fed through a gas pipe 8, which is suitably passed through the wall of housing 1 or which is connected to an external gas pipe through the lower end of housing 1.Space 6 for combustion and subsequent discharge of combustion gases is connected to a pipe 9 passed through thecover 2 of housing 1, which pipe 9 may incorporate adamper 10. Pipe 9 may continue downwardly toadjacent burner 7, in which case pipe 9 closely contacts theinner wall 4 ofreservoir 3, to ensure a good heat transfer to the water contained inreservoir 3. - At the bottom of
reservoir 3, there is provided a cold-water supply-pipe 11, which is passed through the wall of housing 1 in a suitable manner, while at the top ofreservoir 3, a hot-water discharge-pipe 12 connects thereto, saidpipe 12 being passed e.g. throughcover 2. - Between the
outer wall 5 ofreservoir 3 and the inner wall of housing 1, there is provided an annular space 13 through which air to be heated in the housing can be passed. The air to be heated is drawn in throughsuitable openings 14 in the wall of the housing 1 near its top end. The intake of air and its movement through space 13 may be effected e.g. by means of a blower 15 disposed at the bottom of housing 1. For collecting dust and the like, adust filter 16 may be arranged at the bottom of housing 1 above blower 15. - Housing 1 is attached, in any suitable manner, to the
floor 17 of a building to be heated. The bottom of housing 1 is open and connects to achannel 18 provided infloor 17 for further transport and distribution of air heated in the apparatus. - In the embodiment shown of the apparatus according to the present invention, the water in
reservoir 3 is heated by means ofgas burner 7. The air sucked in throughopenings 14 and subsequently transported through the apparatus is heated by contact withwall 5 ofreservoir 3. Because the air is not heated directly byburner 7, a uniform heat supply is possible. - By way of example, the following dimensions for the various parts can be mentioned. The diameter of
space 6, approximately equal to the inside diameter ofreservoir 3 is 12.5 cm. The diameter of theouter jacket 5 ofreservoir 3 is 25 cm. The diameter of housing 1 is 50 cm at the exterior and 35 cm internally. The height of housing 1 as far as the top ofcover 2 is 175 cm and the height ofreservoir 3 is about 145 cm. Theopenings 14 are such that with the given dimensions of space 13, fan 15 transports about 250 m³ of air per hour through the apparatus. - The apparatus is further provided with known per se means, not shown, for regulating the temperature of the water in
reservoir 3 and foroperating gas burner 7 and blower 15 in dependence on the desired functioning.
Claims (1)
- An apparatus for heating air, comprising a substantially cylindrical housing (1), means for conducting air to be heated through the housing and means for heating such air, said latter means comprising a hot-water reservoir (3) arranged through the major part of the length of the housing, said reservoir (3) including a supply (11) and a discharge pipe (12), and a gas burner (7) for heating the water in said reservoir (3), the outer wall of the hot-water reservoir (3) being formed by a cylinder (5), said cylinder (5) and the inner wall of the substantially cylindrical housing (1) defining between them an annular space through which the air to be heated can be conducted, in the hot-water reservoir (3) being comprised a central cylinder (4), concentric with the cylindrical outer wall (5), the gas burner (7) being located at the bottom of said central cylinder (4), so that combustion gases may be discharged through said central cylinder,
characterized in that the ratio of the outside diameter of the hot-water reservoir(3) to its length is between 1:3 to 1:30, the heat supply and construction being such that when water is being drained off from the reservoir, even during a prolonged period of time, the heating of freshly supplied water keeps pace therewith.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8686201715T DE3687754T2 (en) | 1985-04-04 | 1986-10-02 | AIR HEATER. |
AT86201715T ATE85693T1 (en) | 1985-04-04 | 1986-10-02 | AIR HEATER. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8501003A NL192632C (en) | 1985-04-04 | 1985-04-04 | Air heating device. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0262263A1 EP0262263A1 (en) | 1988-04-06 |
EP0262263B1 true EP0262263B1 (en) | 1993-02-10 |
Family
ID=19845792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86201715A Expired - Lifetime EP0262263B1 (en) | 1985-04-04 | 1986-10-02 | An air heating apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0262263B1 (en) |
AT (1) | ATE85693T1 (en) |
DE (1) | DE3687754T2 (en) |
NL (1) | NL192632C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0633434B1 (en) * | 1993-07-05 | 1998-10-28 | Alde International Systems Ab | Combination heating apparatus |
DE102021005382A1 (en) * | 2021-10-29 | 2023-05-04 | Truma Gerätetechnik GmbH & Co. KG | Device for heating room air and a liquid |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7414651A (en) * | 1974-11-11 | 1976-05-13 | Stamicarbon | METHOD, SYSTEM AND EQUIPMENT FOR HEATING HOUSES. |
IT1026099B (en) * | 1974-12-19 | 1978-09-20 | Giovenale Francesco | VARIOUS SECTION TOROIDAL BOILER FOR WATER OR HOT AIR WITH HEATING ALONG THE EXTERNAL GENERATOR AND THE INTERNAL CABLE SUITABLE FOR HEATING SYSTEMS INGROUND BOTH RBANI, INDUSTRIAL AND AGRICULTURAL |
EP0194975A3 (en) * | 1985-03-12 | 1988-07-13 | Gyger, Gilbert | Radiating heating installation |
-
1985
- 1985-04-04 NL NL8501003A patent/NL192632C/en not_active IP Right Cessation
-
1986
- 1986-10-02 EP EP86201715A patent/EP0262263B1/en not_active Expired - Lifetime
- 1986-10-02 DE DE8686201715T patent/DE3687754T2/en not_active Expired - Fee Related
- 1986-10-02 AT AT86201715T patent/ATE85693T1/en active
Also Published As
Publication number | Publication date |
---|---|
NL192632B (en) | 1997-07-01 |
ATE85693T1 (en) | 1993-02-15 |
DE3687754D1 (en) | 1993-03-25 |
DE3687754T2 (en) | 1993-06-09 |
EP0262263A1 (en) | 1988-04-06 |
NL192632C (en) | 1997-11-04 |
NL8501003A (en) | 1986-11-03 |
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