US3382717A - Continuous-flow heater, more particularly for hot-water circulation heating systems - Google Patents

Continuous-flow heater, more particularly for hot-water circulation heating systems Download PDF

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Publication number
US3382717A
US3382717A US521862A US52186266A US3382717A US 3382717 A US3382717 A US 3382717A US 521862 A US521862 A US 521862A US 52186266 A US52186266 A US 52186266A US 3382717 A US3382717 A US 3382717A
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US
United States
Prior art keywords
sleeve
water
temperature
heat
tube
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
Application number
US521862A
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English (en)
Inventor
Keppel Ernst
Putz Hans
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Application granted granted Critical
Publication of US3382717A publication Critical patent/US3382717A/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/08—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • 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
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel

Definitions

  • These walls may be an integral part of the water carrying fin tube of the fin block or they may be a composite of the fin tube and an external or internal sleeve soldered to the fin tube in a manner such that the solder forms a part of the metal heat conducting path between the well and the exterior thereof.
  • a first portion of the external area of the metallic member defining the well is exposed to the water and a second portion of the external area is exposed to the gases, and they are formed so that direct metal heat conduction paths exist between said areas and said well, the second portion of the external area being a major part of the exposed area of the metal.
  • the heat sensor is slightly smaller than the well and is urged against that part of the metal defining the well which is most closely adjacent said first portion.
  • the present invention relates to a continuous-flow heater, more particularly for hot-water circulation heating systems.
  • continuous-flow heaters it is known to provide a heat sensor of a thermostat, for instance, of a liquid thermostat, which is in heat-conducting connection with a flow tube of a fin block disposed in the heating gas current.
  • a heat sensor is known which bears on the top of a flow tube in linear engagement therewith and which together with the flow tube, extends through the recesses of the fins of the fin block.
  • the prior art heat sensing arrangements are not suflicient to effectively protect the heat exchanger designed as fin block against overheating. If the heat sensor with web-type heat bridges to the flow tube is arranged in the Water stream, it will primarily assume the water temperature and, for instance, in the case of water deficiency or vapor formation will not respond in time to an increase in the temperature of the flow tube, since the heat transfer via web-type heat bridges is too small. If, however, the heat sensor is arranged externally of the flow tube in the fin block, without the water temperature being capable of influencing the sensor markedly, the heat sensor in normal state of operation will be at fin temperature.
  • this object is being attained by providing that the heat sensor is tightly enclosed by a wall preventing a Water contact of the heat sensor, but which for the total length thereof and for the major part of its circumference has direct heat-conducting connection with the wall of the water carrying flow tube.
  • the heat sensor may be removed from the fin block in dry state, without the flow channel having to be opened; that the heat sensor is influenced both by the water temperature and by the temperature of the fin block, and is therefore suited as safety device to control a thermostat disposed between the heat exchanger and the radiator of the heating system; and that replaces a thermostat only responding to fin block excess temperature.
  • the operating temperature of the heat sensor is above the temperature of the water under normal operating conditons so that the increases in the water temperature caused by after-heat will not yet cause the thermostat to respond.
  • the temperature which the sleeve wall assumes under these influences is not uniform, but that there will occur a temperature drop in the sleeve wall towards the side which faces the water. Since it is impossible for technical reasons in the manufacture to attain an overall uniform engagement of the inserted heat sensor with the sleeve wall, the temperature assumed by the heat sensor will depend on the incidental position which the heat sensor is in at that moment internally of the sleeve. To eliminate these difliculties, provision is suitably made that the heat sensor is caused to engage internally that portion of the wall the outer side of which faces the water carried through the flow tube. Thereby the water temperature has optimum influence on the heat sensor, while the influence of the fin block temperature, though being weakened, still remains sufliciently great to cause the heat sensor in the case of dry-burning to switch olf the heating capacity.
  • the invention may be designed in various manners.
  • the heat sensor may be inserted in a sleeve closed at one end thereof, arranged in the flow tube and soldered to the wall thereof, on which there is supported a heatcondueting metal sheet covering soldered to the wall of the flow tube.
  • the metal sheet covering may be a fluid guiding plate mounted perpendicularly in the flow tube, the bottom portions of which are embossed to correspond to the rounding of the sleeve and support on the sleeve.
  • a fluid guiding sheet that is carried through the water stream and is in heat-conducting engagement with the walls of the flow tube, serves for better dis tribution of temperature within the water stream. In the manner as herein described it may at the same time be used to form the metal sheet covering.
  • the arrangement may also be provided such that the heat sensor is inserted in a sleeve which is arranged externally of a flow tube and soldered thereto that is formed with a longitudinal embossment adapted to the sleeve rounding, so that the flow tube and the sleeve constitute a common body fitting within the recesses of the fins.
  • the flow tube below a water carrying channel may be formed with a further channel separated therefrom by an intermediate surface, having inserted therein the heat sensor.
  • FIG. 1 illustrates a longitudinal section through a fin tube with soldered-in thermostat sleeve.
  • FIG. 2 is a section at line A-B of FIG. 1 through the lower portion of the fin tube with the sleeve to an enlarged scale as compared with FIG. 1.
  • FIG. 3 illustrates a circular fin tube with soldered in tube sleeve and a metal sheet covering soldered to both main parts.
  • FIG. 4 illustrates a fin tube in section comprising a special channel intended for the heat sensor.
  • FIG. 5 illustrates a fin tube in section comprising an externally abutting sleeve for the heat sensor.
  • Reference numeral 1 designates a fin tube of a fin block, oval in cross-section, having fins 2 mounted thereon in known manner.
  • the fin block closes off the top of the heating compartment H (shown only in part) of a gas-heated continuous-flow heater.
  • the water to be heated flows through the fin tube 1 in the direction of the arrow.
  • Several of these fin tubes are arranged in juxtaposed relation to each other on the fin block and are connected with each other by bends 3.
  • a metal sleeve 4 is soldered.
  • Sleeve 4 is being closed at one end thereof. Further, the metal sleeve 4 is in heat heat-conducting connection with a web plate 5.
  • this web plate 5 is cut at intervals and the bent-off tongues 5', 5" from the center abut the sleeve 4, alternating to the right and left.
  • the web plate 5 is inserted in the fin tube 1 and at the uppermost part of the fin tube 1 is in heat-conducting engagement therewith.
  • Sleeve 4 defines a well 8 to receive sensor 6.
  • the sleeve Prior to insertion of the sleeve, the latter is pressed in at the underside thereof so that a few bosses 4 will be produced.
  • a cylindrical heat sensor 6 which is inserted into the sleeve 4, bears on the bosses 4' of the sleeve 4 which causes the rounded top thereof to come into heat-conducting engagement with the upper portion of the sleeve wall, facing the water.
  • the sleeve 13 soldered to the lowermost point of a circular flow tube 10 is covered by a metal sheet covering 16 the ends 16' of which abut the wall of the flow tube 10. With the soldering thereof, here too, such a large metallic cross-section is available for the heat transfer that the sleeve 13, in operation of the apparatus, assumes a temperature being above the temperature of the water under normal operating conditions.
  • Sleeve 13 forms a well 14 to receive the heat sensor 6 (not shown in FIG. 3).
  • the cross-section of a flow tube 17 is divided into two channels 17, 17".
  • the upper channel 17 is the Water carrying flow channel while the lower channel 17" forms a well to accommodate the heat sensor 6. Of course, one end of the channel 17" is closed.
  • the flow tube 18 it is also possible, as is illustrated in FIG. 5, to form the flow tube 18 such that the tube sleeve 13 positively engages the flow tube 18 provided with a longitudinal embossment 18'. After soldering of the two parts 18, 13 together and to the fins 2 a good heat transfer is ensured in the meaning of the invention.
  • the profile of the dual body formed in such manner fits in the customary recess of the fins 2.
  • the heat sensor 6 will be inserted into sleeve 13 and channel 17" so that it internally abuts at the top thereof, which may be achieved by boss or rib type depressions 4'.
  • the temperature of the heat sensor 6 drops only relatively little as the temperature of the water continues to exercise a strong influence on the temperature of the heat sensor.
  • a resp nse of the thermostat is ensured in the case of water deficiency or formation of vapor. If an additional thermostat of the central heating system, connected between the heat exchanger and the radiator of the heating system, controlling the water temperature fails to operate, then the safety thermostat c ntrolled by the heat sensor 6 due to a sufficient water temerature influence will also respond to an intolerable increase in the water temperature so that a control of the thermostat disposed bet-ween the heat exchanger and the radiator of the heating system is thus achieved. It is of importance that the heat sensor t5 engages that portion of sleeve 4, 13 and of channel 17, respectively, that is disposed to the side of the water.
  • the heat sensor 6 which is additionally influenced by the higher temperature of the fin block and the fin tube, respectively, must reach a switch-off temperature of 262.4 F. If the continuous-fiow heater is temporarily run with strongly reduced capacity, for instance half, the temperature of the fin tube Will decrease more strongly than that of the water. The heat sensor will now receive less heat from the side of the fin tube. Therefore, the heat sensor will only reach the switch-off temperature of 262.4 F. at a higher water temperature than was previously provided with 230 F.
  • the water temperature increases up to 251.6 F., before the heat sensor 6 reaches its switch-off temperature of 262.4 F.
  • switch-off by the temperature limiting device instead of at 230 F., will only take place at a 2l.6 F. higher temperature between the heat exchanger and the radiator of the heating system of 251.6 F.
  • the heat sensor-as has been described hereiribefore-abuts at the top, that is at the side of sleeve 4 and 13, respectively, facing the water, it will already reach its switch-off temperature of 262.4 F. at a water temperature of from 237.2 to 239 F. so that thus at half heating capacity only an excess temperature of 9 F. insteadof 21.6 F. must be put up with.
  • a temperature sensor in a hot Water heating system having a fin block through which water flows and externally of which the hot gases of combustion flow
  • metallic means defining a well enclosed except for one end and receiving said sensor, said means having a first portion of its external area exposed to said water and a second portion of its external area exposed to said gases with direct metal heat conduction paths between said areas and said well, said first portion being a major part of the eX- posed area of said means, and said second portion being a substantial part of said exposed area whereby said sensor is strongly influenced by the temperatures f both the Water and the hot gases.
  • said metallic means includes a fin tube of said fin block, a sleeve and a soldered connection therebetween, said sleeve having closed and open ends and being positioned in the tube with its closed end in the tube and its open end outside said tube, said sleeve being positioned against an inner side of the tube and soldered thereto.
  • said metallic means includes a fin tube of said fin block, a sleeve and a soldered connection therebetween, said sleeve having closed and Open ends and being positioned externally of the tube in contact therewith and soldered thereto.
  • said metallic means includes a unitary fin tube carrying the water with a 'well along one side of the outside thereof.
  • said metallic means includes a fin tube of said fin block, a sleeve and a soldered connection therebetween, said sleeve having closed and open ends and being positioned in the tube with its closed end in the tube and its open end outside said tube, said sleeve being positioned against an inner side of the tube and soldered thereto.
  • said metallic means includes a fluid guiding plate extending longitudinally and radially of said tube with one side thereof fitting about the sides of the sleeve in contact therewith.
  • aid metallic means includes a fin tube of said in block, a sleeve and a soldered connection therebetween, said sleeve having closed and open ends and being positioned externally of the tube in contact therewith and soldered thereto.
  • said metallic means includes a unitary fin tube carrying the water with a well along one side of the outside thereof.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Physics & Mathematics (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
US521862A 1965-03-27 1966-01-20 Continuous-flow heater, more particularly for hot-water circulation heating systems Expired - Lifetime US3382717A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEV28163A DE1301035B (de) 1965-03-27 1965-03-27 Anordnung bei Durchlauferhitzern, insbesondere fuer Warmwasser-Umlaufheizungsanlagen
DEV0028665 1965-06-12

Publications (1)

Publication Number Publication Date
US3382717A true US3382717A (en) 1968-05-14

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Application Number Title Priority Date Filing Date
US521862A Expired - Lifetime US3382717A (en) 1965-03-27 1966-01-20 Continuous-flow heater, more particularly for hot-water circulation heating systems

Country Status (6)

Country Link
US (1) US3382717A (xx)
AT (1) AT257878B (xx)
BE (1) BE678103A (xx)
DE (1) DE1301035B (xx)
FR (1) FR1473476A (xx)
NL (1) NL6601723A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911747A (en) * 1973-11-09 1975-10-14 Robert B Sivyer Thermal weld monitoring device
US5062571A (en) * 1991-02-06 1991-11-05 Rayco Enterprises, Inc. Temperature sensing control for refrigeration system
US20080307901A1 (en) * 2005-12-10 2008-12-18 Jeremy Knight Gas Probes
US9648665B2 (en) 2014-06-24 2017-05-09 Bleckmann Gmbh & Co. Kg Heating system component having temperature monitoring and/or control unit attached to carrier unit with welded seam and related method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463800A (en) * 1982-09-27 1984-08-07 Hadden Clifford F Radiator mounted condition sensing probe
FR2637171B1 (fr) * 1988-10-04 1994-04-01 Berta Daniel Conducteur de chaleur pour adaptation d'un thermostat a la paroi d'une cuve et plus specialement d'une marmite de cuisson
DE102007052934A1 (de) * 2007-11-02 2009-05-14 Gerdes Ohg Durchlauferhitzer mit einem Sicherheitstemperaturbegrenzer
EP2960594A1 (en) * 2014-06-24 2015-12-30 Bleckmann GmbH & Co. KG Heating system component and method for producing same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886042A (en) * 1930-10-13 1932-11-01 Grigsby Grunow Co Refrigerator
US2047223A (en) * 1934-09-14 1936-07-14 Houdry Process Corp Mounting of wells for indicating and recording apparatus
US2197582A (en) * 1938-03-26 1940-04-16 Gen Motors Corp Refrigerating apparatus
US2266321A (en) * 1940-06-04 1941-12-16 Leonard H Holder Roof cooling device
US3266318A (en) * 1963-04-03 1966-08-16 Vincent V Abajian Thermosensitive device for temperature indication and/or control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886042A (en) * 1930-10-13 1932-11-01 Grigsby Grunow Co Refrigerator
US2047223A (en) * 1934-09-14 1936-07-14 Houdry Process Corp Mounting of wells for indicating and recording apparatus
US2197582A (en) * 1938-03-26 1940-04-16 Gen Motors Corp Refrigerating apparatus
US2266321A (en) * 1940-06-04 1941-12-16 Leonard H Holder Roof cooling device
US3266318A (en) * 1963-04-03 1966-08-16 Vincent V Abajian Thermosensitive device for temperature indication and/or control

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911747A (en) * 1973-11-09 1975-10-14 Robert B Sivyer Thermal weld monitoring device
US5062571A (en) * 1991-02-06 1991-11-05 Rayco Enterprises, Inc. Temperature sensing control for refrigeration system
US20080307901A1 (en) * 2005-12-10 2008-12-18 Jeremy Knight Gas Probes
US8424396B2 (en) * 2005-12-10 2013-04-23 Endet Ltd Gas probes
US9528917B2 (en) 2005-12-10 2016-12-27 Endet Ltd Gas probes
US9766163B2 (en) 2005-12-10 2017-09-19 Endet Ltd. Gas probes
US10712243B2 (en) 2005-12-10 2020-07-14 Endet Limited Gas probes
US11105716B2 (en) 2005-12-10 2021-08-31 Orbital Energy Group, Inc. Gas probes
US9648665B2 (en) 2014-06-24 2017-05-09 Bleckmann Gmbh & Co. Kg Heating system component having temperature monitoring and/or control unit attached to carrier unit with welded seam and related method

Also Published As

Publication number Publication date
NL6601723A (xx) 1966-09-28
DE1301035B (de) 1969-08-14
AT257878B (de) 1967-10-25
FR1473476A (fr) 1967-03-17
DE1679780A1 (de) 1971-07-08
BE678103A (xx) 1966-09-01

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