US3778593A - Electrical heating units - Google Patents

Electrical heating units Download PDF

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Publication number
US3778593A
US3778593A US00194975A US3778593DA US3778593A US 3778593 A US3778593 A US 3778593A US 00194975 A US00194975 A US 00194975A US 3778593D A US3778593D A US 3778593DA US 3778593 A US3778593 A US 3778593A
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US
United States
Prior art keywords
container
water
stone
stone material
heat
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
US00194975A
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English (en)
Inventor
G Wikstrom
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.)
SNA Europe Industries AB
Original Assignee
Bahco AB
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 Bahco AB filed Critical Bahco AB
Application granted granted Critical
Publication of US3778593A publication Critical patent/US3778593A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • a steam bath unit including a heat accumulator comprising a stone magazine located in a container, the walls of the container being surrounded by an electrical heating element. The temperature to which the stones are to be heated by the element is set by a thermostat.
  • An open water container is partially submerged in the stone magazine. The water container is so mounted that its lateral location relative to the walls of the container may be varied. As the water in the container is heated essentially by heat received from the surrounding stones, the time at which the water boils is thereby controlled by the containers location in the stone magazine i.e., the time at which the surrounding stones are heated.
  • the present invention relates to an arrangement in an electrically heated sauna bath unit having an electrical heat source and a heat accumulator, e.g. a collection of stones, and adapted to maintain a certain degree of humidity inside the sauna room while maintaining the temperature in the room at a predetermined set point value, preferably by means of a thermostat located in the room and controlling the heat source.
  • a heat accumulator e.g. a collection of stones
  • the available electrical power must be used for increasing the temperature of the air, for increasing the humidity of the atmosphere by vaporizing water, and for at least starting the storing of heat in the heat accumulator of the unit, even though the heat absorbed by the accumulator need not at the beginning of a bathing period be sufficient to vaporize water if thrown on the stones.
  • the problem which the invention is primarily intended to resolve pertains to means for increasing the humidity of the air, a factor on which special requirements must be placed to ensure that the portion of the available power used for such a purpose during the preparatory period is not unreasonably great to the detriment of rapid increases in temperature in the bath.
  • the unit is provided with means for immediately vaporizing the water, a significant portion of the available power must be used to provide for the heat required to vaporize the water.
  • the condensation of water on still rather cold surfaces, especially external walls would be liable to take place, thereby further impairing the process of heating the bath.
  • the object of the invention is to eliminate the aforementioned disadvantages by means of an arrangement which will not draw on the available power for vaporizing water until the temperature in the bath has reached approximately its set point value.
  • the arrangement comprises only extremely simple and inexpensive means for achieving this result, since the sauna bath unit itself is an extremely simple and inexpensive product which cannot be encumbered with the costs involved by conventional means for automatically controlling such temperature dependent humidifying processes.
  • the present invention thus relates to an arrangement in an electrically operated sauna bath unit provided with a thermostat controlled electric heat source for heating air circulating through the bath and for heating a collection of stones in a manner such that said stones are able to give off the required amount of heat when water is thrown thereon, and also provided with an open water container for vaporizing water so that the air contained within the bath can be humidified from the very beginning of the bathing period,
  • this arrangement being mainly characterized in that the container is so constructed and so brought into heat conductive contact with the stones that the water present in the container is caused to boil under the influence of the heat from the stones at a point of time which is slightly earlier than the time at which the temperature of the bath reaches the temperature set on the thermostat.
  • the illustrated steam bath unit comprises a casing or jacket 1 which is provided with means for suspending the unit from a suitable attachment point and for connecting the unit to a source of electrical power and which encircles an electrical heat source 2 and a heat accumulator 3.
  • the heat source 2 comprises a number of electrical heating elements encapsulated in tubes and arranged in the form of a helix around the heat accumulator 3.
  • the heat accumulator 3 consists of a collection of stones, i.e. socalled stone magazine, located in a container 5 which is open around the periphery at the bottom thereof and covered at the top with a perforated plate 4.
  • the casing l is open at the top and bottom thereof.
  • an annular slot 6 Located between the casing l and the container 5 is an annular slot 6 in which heating elements 2 are arranged and through which a flow of air passes as a result of the chimney effect produced when the heating elements are active.
  • water can be poured over the perforated plate 4, which distributes the water to the stones heated by the heating elements.
  • an upwardly open water container 7 is arranged in the container 5, partially submerged in the stone magazine at such a distance from the wall of the container 5 which is heated essentially by radiation from the heating elements 2 that the transport of heat to the water in the container is only sufficient to cause the water to boil when the temperature in the surrounding bath has substantially reached the set point value set on the thermostat 10.
  • the water container 7 is arranged so that, at least with respect to its lateral position, it can be moved relative to the wall of the container 5. Movement of the water container 7 is made possible by the fact that the water container is suspended by means of two opposing pins 8 in two horizontal guide bars 9 (only one pin and one rail being shown in the drawing).
  • the store of water in the container is automatically replenished when water is poured on to the plate in order to increase abruptly the humidity of the atmosphere in the bath.
  • the container 7 may naturally be placed anywhere where the transfer of heat from the heating elements provides the desired delay with respect to the initiation of the water vaporizing process.
  • the container may be provided with heat insulating means or may be made from a material having poor heat conductivity. A heat accumulating material may be used in respect of both the container and the insulating material, when used.
  • An electrically operated sauna bath unit including a container for stone material to be heated, said container adapted to be filled to a predetermined level with stone material, an electric heat source surrounding the stone container for heating the air circulating through the bath unit and the stone material adapted to be contained in the stone container, thermostat means for controlling the heat source for controllably heating substantially all of the stone material to at least a predetermined temperature and a water container located within said stone container and positioned such that a major portion of said water container is located below said predetermined fill level and adapted to be in heat conducting contact with the stone material when filled to said predetermined level whereby heat is transferred by the stone material to the water container causing the water in the water container to boil earlier than the time at which the temperature of the bath reaches the minimum temperature established by the thermostat.
  • a sauna bath as claimed in claim 1 including means for suspending said water container in said stone container in a position to be surrounded by the stone material when the stone container is filled to the predetermined level, said water container thereby being adapted to be shielded by the stone material from said heating elements so that the heat from said heating elements is transferred by the stone material to said water container, the water in the container thereby being brought to a boiling temperature slightly before said thermostat shuts off said heating elements.
  • a sauna bath as claimed in claim 2 wherein said stone container is at least partially open at its upper end, said water container being upwardly open and suspended beneath said stone container opening so that water thrown through the container opening upon said stone material also replenishes the water in said water container.

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)
  • Thermally Actuated Switches (AREA)
US00194975A 1970-11-03 1971-11-02 Electrical heating units Expired - Lifetime US3778593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1484770 1970-11-03

Publications (1)

Publication Number Publication Date
US3778593A true US3778593A (en) 1973-12-11

Family

ID=20299768

Family Applications (1)

Application Number Title Priority Date Filing Date
US00194975A Expired - Lifetime US3778593A (en) 1970-11-03 1971-11-02 Electrical heating units

Country Status (7)

Country Link
US (1) US3778593A (de)
CA (1) CA939716A (de)
DE (1) DE2154054C3 (de)
DK (1) DK129502B (de)
FR (1) FR2113506A5 (de)
GB (1) GB1375727A (de)
NO (1) NO130216B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296507A (en) * 1978-11-08 1981-10-27 Tylo Sauna S.A. Sauna heating unit and shield therefor
US5771503A (en) * 1995-08-07 1998-06-30 Valimaa; Markku Tapani Humidifier for use in a sauna stove
US5809941A (en) * 1996-04-16 1998-09-22 Allaire; Ernest Lee High efficiency hot water heater for recreational vehicles
US6228175B1 (en) * 1999-09-30 2001-05-08 Kent Ridgeway Apparatus for generating a wet oxygen stream for a semiconductor processing furnace

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742631A1 (de) * 1987-12-16 1989-06-29 Hubert Kurz Ofen fuer saunakabine
EP0757908A3 (de) * 1995-08-07 1997-03-05 Markku Tapani Välimaa Befeuchter für Saunaofen
RU2493484C2 (ru) * 2011-12-05 2013-09-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Государственный университет - учебно-научно-производственный комплекс" (ФГБОУ ВПО "Госуниверситет - УНПК") Парогенератор

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB521168A (en) * 1938-11-10 1940-05-14 Electro Horticultural Equipmen Improvements in or relating to electric convection heaters for greenhouses and the like
FR958137A (de) * 1950-03-03
DE805165C (de) * 1949-09-21 1953-09-28 Martin Achner Elektrischer Heizofen, insbesondere fuer medizinische Zwecke
US2709214A (en) * 1951-10-23 1955-05-24 Engdabl Seth Mauritz Fingal Hot-air and steam bath apparatus
US3147367A (en) * 1963-12-17 1964-09-01 Bahco Ab Steam bath apparatus
US3531623A (en) * 1966-03-17 1970-09-29 Teeri Niilo H Electrically heated sauna unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR958137A (de) * 1950-03-03
GB521168A (en) * 1938-11-10 1940-05-14 Electro Horticultural Equipmen Improvements in or relating to electric convection heaters for greenhouses and the like
DE805165C (de) * 1949-09-21 1953-09-28 Martin Achner Elektrischer Heizofen, insbesondere fuer medizinische Zwecke
US2709214A (en) * 1951-10-23 1955-05-24 Engdabl Seth Mauritz Fingal Hot-air and steam bath apparatus
US3147367A (en) * 1963-12-17 1964-09-01 Bahco Ab Steam bath apparatus
US3531623A (en) * 1966-03-17 1970-09-29 Teeri Niilo H Electrically heated sauna unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296507A (en) * 1978-11-08 1981-10-27 Tylo Sauna S.A. Sauna heating unit and shield therefor
US5771503A (en) * 1995-08-07 1998-06-30 Valimaa; Markku Tapani Humidifier for use in a sauna stove
US5809941A (en) * 1996-04-16 1998-09-22 Allaire; Ernest Lee High efficiency hot water heater for recreational vehicles
US6228175B1 (en) * 1999-09-30 2001-05-08 Kent Ridgeway Apparatus for generating a wet oxygen stream for a semiconductor processing furnace

Also Published As

Publication number Publication date
DE2154054A1 (de) 1972-05-04
DE2154054C3 (de) 1974-09-05
FR2113506A5 (de) 1972-06-23
DK129502C (de) 1975-03-10
DE2154054B2 (de) 1973-03-01
NO130216B (de) 1974-07-29
DK129502B (da) 1974-10-21
CA939716A (en) 1974-01-08
GB1375727A (de) 1974-11-27

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