US3769494A - Overheating protection arrangement in an electric sauna unit - Google Patents
Overheating protection arrangement in an electric sauna unit Download PDFInfo
- Publication number
- US3769494A US3769494A US00223926A US3769494DA US3769494A US 3769494 A US3769494 A US 3769494A US 00223926 A US00223926 A US 00223926A US 3769494D A US3769494D A US 3769494DA US 3769494 A US3769494 A US 3769494A
- Authority
- US
- United States
- Prior art keywords
- opening
- air passage
- air
- sauna
- thermostatic switch
- 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
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/06—Artificial hot-air or cold-air baths; Steam or gas baths or douches, e.g. sauna or Finnish baths
- A61H33/063—Heaters specifically designed therefor
Definitions
- the invention relates to an electric sauna unit comprising a casing which forms an air passage open at the bottom and at the top and is adapted to be mounted adjacent a wall of the sauna space, and further comprising electric heating elements located in the air passage.
- the primary object of this invention is to provide an electric sauna unit of the kind referred to, which eliminates the risk for fires of the related type.
- an electric sauna unit comprising a casing forming the wall of an air passage open at the bottom and at the top, said casing being adapted to be mounted adjacent a wall in a sauna space, at least one electric heating element located in the air passage, a thermostatic switch for controlling the current supply to the heating element, an opening formed by the wall of the air passage in an upper part thereof, and a sensing element operatively connected with the thermostatic switch and sensing the temperature of air flow passing through the opening when the sauna unit is operated, to actuate the thermostatic switch at a predetermined temperature of such air flow for interrupting the current supply of the heating element.
- thermostatic switch Due to the heating of the sensing element the thermostatic switch will be operated to break the supply circuit of the heating elements and, thus, the heating of the sauna unit will cease.
- the thermostatic switch may be adjusted to be actuated at a relatively low temperature since the temperature of the sensing element in the opening is comparatively low during the normal operation of the sauna unit, making it possible to eliminate every risk for overheating of the sauna unit to such an extent that there is impending risk for a fire.
- FIG. 1 is a vertical cross sectional view of a sauna unit according to the invention when covered by an object
- PEG. 2 is an elevational view of the rear side of the sauna unit.
- the sauna unit shown in the drawing is of a construction commonly known having a metal sheet casing 10 which may be double walled and forms an air passage 11 open at the top and the bottom, in which there are located tubular electric heating elements l2, e.g., one for each phase of a three-phase supply. These heating elements are mounted on a connection box and are supported thereby cables being drawn in the conventional manner to a heat control apparatus of a known type. Heating elements 12 may extend into a chamber for heat accumulating bodies, usually stones, located in air passage ill or in another manner. As far as the arrangement of the air passage and a stone chamber, if any, is concerned, the sauna unit may be of one of the well-known constructions appearing on the market such as that disclosed in British Patent Specification No.
- the sauna unit is adapted to be mounted close to a wall of the sauna space, e.g., on the wall proper by means of brackets or similar means, one wall lid of casing ill facing the sauna wall to form the rear wall of the unit.
- an opening l5 formed as a horizontally extending narrow slot in the upper half portion of the rear wall the slot being spaced a short distance from the upper end of the sauna unit.
- a sensing element in which is connected by a conduit 17 with a thermostatic switch 18 located on or in connection box l3.
- This sensing element in which may be formed as a tubular liquid container is mounted by means of fastening members 16' on a flap 1S deflected from the rear wall into air passage 11 about the lower edge of opening 15 when forming said opening.
- the liquid container is connected by a capillary tube forming conduit with a bellows or other expansion member forming part of thermostatic switch 1%.
- sensing element 16 defined by adjustment members provided in thermostatic switch it the liquid in the communicating liquid system formed by sensing element 16, conduit l7 and the expansion member of thermostatic switch 18 will have expanded to a sufficient degree to actuate thermostatic switch 18 over the expansion member.
- a channel 20 is mounted on the rear wall of the sauna unit to form a protection for conduit 17 which is relatively damageable.
- thermostatic switch 18 is adjusted to be maintained unacted at the temperature assumed by sensing element 16 during normal operation of the sauna unit.
- the thermostatic switch may be normally closed and may be connected in series with heating elements 112 in the electric circuit to be opened at a predetermined temperature of sensing element 16 which is higher than that normally assumed by the sensing element such that the current through the heating elementswill be interrupted.
- thermostatic switch 18 may also beincluded in a separate control circuit for the supply circuit of the heating elements to initiate opening of a circuit breaker when closed at said higher temperature the circuit breaker interrupting the supply circuit of the heating elements.
- the sauna unit is covered completely or partly by means of an object such as a towel or the like or, as illustrated in the drawing, by a panel 21 the heated air will be deflected by the covering object and will leave air passage 11 not through the upper end thereof but through opening l'as is indicated by arrows 22 in FlG. 1.
- the hot air flow grazing sensing element 16 raises the temperature thereof considerably and due to the fact that the thermostatic switch is adjusted to react on a relatively low temperature the heating of sensing element 16 will immediately result in an interruption of the current supply to heating elements 12. Any risk for the sauna unit ever to be heated to a temperature which is so high that a covering object or the wall behind will be ignited is thus completely eliminated by this arrangement.
- the arrangement described provides an overheating protection arrangement for an electric sauna unit which is as simple as effective.
- the disclosed embodiment may be modified within the scope of the following claims concerning the construction of the thermostatic switch and the location as well as the arrangement of opening 15 and sensing element 16 and also concerning the construction of the sensing element.
- the overheating protection arrangement will function not only when the'sauna unit is covered but also in case the air circulation through the unit should be obstructed for other reasons for example due to defective ventilation of the sauna space or if the thermostatic means normally responsible for the temperature control in the sauna space should fail and allow un unlimited temperature raise.
- An electric sauna unit comprising: a casing adapted to be mounted adjacent a wall in a sauna space and defining an air passage having a generally vertical extension and communicating with the ambient atmosphere via the open bottom and top of the casing through which air flows during normal operation, at least one electric heating element located in said air passage, a thermostatic switch for controlling the current supply to the heating element, an opening formed in an upper part of the casing and adapted so that during normal operation of the unit it allows a flow of cool air through said opening from the outside of the casing to the air passage, whereas if the air passage is obstructed the flow of heated air will leave the air passage through said opening, and a sensing element operatively connected to the thermostatic switch being located in the said opening in order to sense the temperature of the air flow passing through said opening and adapted to actuate the thermostatic switch for interrupting the current supply to the heating element when the temperature at the opening reaches a predetermined value.
- thermostatic switch is located in a lower portion of the air passage.
- the sensing element being mounted on said flap
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Devices For Medical Bathing And Washing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1531/71A SE346064B (fr) | 1971-02-08 | 1971-02-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3769494A true US3769494A (en) | 1973-10-30 |
Family
ID=20258353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00223926A Expired - Lifetime US3769494A (en) | 1971-02-08 | 1972-02-07 | Overheating protection arrangement in an electric sauna unit |
Country Status (3)
Country | Link |
---|---|
US (1) | US3769494A (fr) |
DE (1) | DE2205358C3 (fr) |
SE (1) | SE346064B (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4045652A (en) * | 1974-09-04 | 1977-08-30 | Janson Sven Olof | Device for preventing overheating of electric apparatuses |
US4227068A (en) * | 1976-02-20 | 1980-10-07 | Societe Prl | Convector heater |
US4260875A (en) * | 1978-06-19 | 1981-04-07 | Clairol Incorporated | Controlled temperature hair dryer |
US4375590A (en) * | 1979-06-14 | 1983-03-01 | Tylo Sauna S.A. Corporation | Temperature regulator mounting arrangement for electric sauna heating units |
US4939344A (en) * | 1985-10-03 | 1990-07-03 | Oy Helo-Tehtaat | Electric sauna oven with shield for transmitting heat radiation to detector |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2601173A1 (de) * | 1976-01-14 | 1977-07-28 | Klafs Saunabau | Saunaofen |
DE2751833C3 (de) * | 1977-11-19 | 1989-03-16 | Braun Ag, 6000 Frankfurt | Elektrischer Haartrockner mit Gebläse und Heizung |
FI125003B (fi) * | 2013-10-22 | 2015-04-30 | Risto Tapio Yli-Kovero | Kannella varustettu saunan kiuas |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512892A (en) * | 1944-10-11 | 1950-06-27 | Forsberg Gote Ansgar | Heating apparatus for hot-air or steam baths |
US2988626A (en) * | 1958-12-05 | 1961-06-13 | Robbins & Myers | Baseboard heater and the like |
US3147367A (en) * | 1963-12-17 | 1964-09-01 | Bahco Ab | Steam bath apparatus |
CH416870A (de) * | 1963-03-05 | 1966-07-15 | Petz Elektro Waerme Techn | Thermolüfter mit einem Heizregister |
US3277274A (en) * | 1964-01-29 | 1966-10-04 | Raabe Ulo | Electric sauna bath heating unit |
US3305665A (en) * | 1959-11-17 | 1967-02-21 | Laing Vortex Inc | Forced circulation electric heater employing cross-flow type fan |
US3341675A (en) * | 1965-08-26 | 1967-09-12 | Sola Basic Ind Inc | Space heater with two thermal sensors acting on a controller actuator along approximately the same line |
US3348021A (en) * | 1965-02-15 | 1967-10-17 | Gen Electric | Electric heater assembly for a sauna room |
US3400248A (en) * | 1965-12-08 | 1968-09-03 | Isomaa Erik | Electric steam bath stove |
US3452369A (en) * | 1967-06-14 | 1969-07-01 | Viking Sauna Co | Compact sauna unit |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB766533A (en) * | 1952-04-04 | 1957-01-23 | Gillott Electro Appliances Ltd | Improvements in or relating to electric convection heaters |
DE1748693U (de) * | 1957-04-20 | 1957-07-18 | Ludwig Martin Fa | Elektrisches heizgeraet mit mehreren heizstufen. |
DE1224446B (de) * | 1961-07-15 | 1966-09-08 | Robert Thoener | Zusammenklappbare Heimsauna |
DE1868414U (de) * | 1963-01-09 | 1963-03-07 | Alaska Werk Dieter Schildbach | Heimsauna. |
DE1959204A1 (de) * | 1969-11-26 | 1971-06-09 | Damen Karl Dipl Ing | Elastisches Arbeitsfugenband mit Versteifungseinlagen in Laengsrichtung |
-
1971
- 1971-02-08 SE SE1531/71A patent/SE346064B/xx unknown
-
1972
- 1972-02-04 DE DE2205358A patent/DE2205358C3/de not_active Expired
- 1972-02-07 US US00223926A patent/US3769494A/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512892A (en) * | 1944-10-11 | 1950-06-27 | Forsberg Gote Ansgar | Heating apparatus for hot-air or steam baths |
US2988626A (en) * | 1958-12-05 | 1961-06-13 | Robbins & Myers | Baseboard heater and the like |
US3305665A (en) * | 1959-11-17 | 1967-02-21 | Laing Vortex Inc | Forced circulation electric heater employing cross-flow type fan |
CH416870A (de) * | 1963-03-05 | 1966-07-15 | Petz Elektro Waerme Techn | Thermolüfter mit einem Heizregister |
US3147367A (en) * | 1963-12-17 | 1964-09-01 | Bahco Ab | Steam bath apparatus |
US3277274A (en) * | 1964-01-29 | 1966-10-04 | Raabe Ulo | Electric sauna bath heating unit |
US3348021A (en) * | 1965-02-15 | 1967-10-17 | Gen Electric | Electric heater assembly for a sauna room |
US3341675A (en) * | 1965-08-26 | 1967-09-12 | Sola Basic Ind Inc | Space heater with two thermal sensors acting on a controller actuator along approximately the same line |
US3400248A (en) * | 1965-12-08 | 1968-09-03 | Isomaa Erik | Electric steam bath stove |
US3452369A (en) * | 1967-06-14 | 1969-07-01 | Viking Sauna Co | Compact sauna unit |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4045652A (en) * | 1974-09-04 | 1977-08-30 | Janson Sven Olof | Device for preventing overheating of electric apparatuses |
US4227068A (en) * | 1976-02-20 | 1980-10-07 | Societe Prl | Convector heater |
US4260875A (en) * | 1978-06-19 | 1981-04-07 | Clairol Incorporated | Controlled temperature hair dryer |
US4375590A (en) * | 1979-06-14 | 1983-03-01 | Tylo Sauna S.A. Corporation | Temperature regulator mounting arrangement for electric sauna heating units |
US4939344A (en) * | 1985-10-03 | 1990-07-03 | Oy Helo-Tehtaat | Electric sauna oven with shield for transmitting heat radiation to detector |
Also Published As
Publication number | Publication date |
---|---|
DE2205358B2 (de) | 1977-11-24 |
DE2205358A1 (de) | 1972-08-24 |
DE2205358C3 (de) | 1984-08-02 |
SE346064B (fr) | 1972-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2471784A (en) | Heat exchange unit | |
US4110600A (en) | Thermostatically controlled plural heat output portable electric space heater | |
US2870319A (en) | Combined heating and ventilating unit | |
US3769494A (en) | Overheating protection arrangement in an electric sauna unit | |
US2779855A (en) | Automatic electrically operated water heater | |
US1788515A (en) | Electric radiator | |
US3731057A (en) | Sensing means for electric fan heater | |
US1492582A (en) | Cooking apparatus | |
US3348021A (en) | Electric heater assembly for a sauna room | |
US4045652A (en) | Device for preventing overheating of electric apparatuses | |
US2369972A (en) | Cooking and heating apparatus | |
US2776797A (en) | Downflow forced air heating systems | |
US5197112A (en) | Fixed volume PTC air heater with heat output adjusted by a damper controlling air flow over the PTC element | |
US2553212A (en) | Electric house-heating apparatus | |
US3215816A (en) | Oven | |
US2194805A (en) | Heating system | |
US1708580A (en) | Heating system | |
US3627202A (en) | Forced circulation gas water heater | |
US4365142A (en) | Electrical unit for stoves, fireplaces and like devices | |
US2833268A (en) | Combined air and water heater | |
US2160740A (en) | Room thermostat | |
US3006334A (en) | Warm air furnace | |
US3111122A (en) | Baseboard-type gas heater | |
US3384070A (en) | Gas wall heater | |
US3255746A (en) | Oven exhaust structure |