Liquid heaters and vaporizers – Stand boiler
Patent
1987-10-27
1989-11-21
Favors, Edward G.
Liquid heaters and vaporizers
Stand boiler
219311, F22B 500
Patent
active
048814938
DESCRIPTION:
BRIEF SUMMARY
The invention refers to a steam generator with a steam boiler according to the preamble of claim 1. A steam generator of this kind shall in particular be suitable for generating steam for a sauna or as a steam source for a flat-iron to be connected thereto through a conduit.
A steam generator according to the preamble of claim 1 is known from the DE-A-34 10 247. This known steam generator comprises a heating coil within the interior of the container. A lower and an upper water level measuring means are provided in a distance from each other and connected with a control unit. The water supply is controlled such that the water level is above the lower and below the upper water level measuring means. In such steam generators the problem is encountered that the heating becomes furred and the heat transfer is then low. The conventional steam generator has the form of a pot which requires that a comparatively large amount of water must be heated in order to obtain steam. The pot must be decalcified from time to time in known manner.
From the DE-A-32 01 574 an apparatus for generating steam for the treatment of pets and in particular the treatment of pigeon feathers is known. The steam generator comprises a pot which is embedded in an outer insulation. a heating means is provided in this outer insulation in a distance from the inner casing. In this apparatus such a small amount of water is heated that just the small amount of steam which is required for the treatment of pigeon feathers may be withdrawn through an outlet pipe. The interior of the container is connected with the environment through the outlet pipe, i.e. pressureless.
It is the object of the invention to provide an improved steam generator. It shall in particular be made possible to provide a large heating power in a smaller boiler volume or liquid volume, respectively, within the boiler. Moreover, the manufacture of the steam generator shall be simple. The water level shall be easily adjustable. The steam generator should in particular be suitable as a steam source for a sauna.
The object is achieved by a steam generator of the kind described at the outset with the features of claim 1.
Further features and advantages of the invention will stand out from the description of an embodiment with reference to the drawings. In the drawings:
FIG. 1 is a lateral view of the relevant part of the steam generator in partly sectional representation;
FIG. 2 is a schematic representation of the steam generator with the associated valves;
FIG. 3 is a schematic representation of the circuit for operating the steam generator; and
FIG. 4 shows a detail of FIG. 1.
The steam generator comprises a steam boiler 1 which is made of stainless special steel and designed in tubular form. Both ends of the tube are provided with a respective flange 2 on which rests a gasket 3. A respective flange cover 4 is pulled together in a dimensionally stable and tight manner with a respective pressure plate 6 by means of bolts 5 at the upper and lower side. An opening 7 for withdrawing steam, which is adapted to be connected with a conduit, is provided at the upper face of the flange cover for. An opening 8 which is connected with a water supply is provided at the lower face of the flange cover for. The lower opening 8 may be opened for the draining-off of boiler sediments or fur.
A heating coil 9 is provided in the lower third adjacent to the lower face of the tubular boiler. As may be in particular seen from FIG. 4, the shape of the heating coil 9 is selected to be profiled such that it comprises a large bottom region 35 which all-over contacts the outer side of the boiler shell and is connected thereto in a good heat conducting manner, for example by being metallically alloyed through a sinter brazing process. The boiler 1 thus forms a cooling surface for the heating coil 9. Means for determining the water level within the casing are provided in form of a temperature probe 10 in tight contact with the upper end of the heating coil 9. In the shown embodiment, the temperature probe is f
REFERENCES:
patent: 2785272 (1957-03-01), Baly
patent: 2861169 (1958-11-01), Bowen et al.
patent: 3419666 (1968-12-01), Groom
patent: 3910498 (1975-10-01), Harrison
patent: 4480173 (1984-10-01), Butterfield
patent: 4598694 (1986-07-01), Cromer
Brown Donald
Favors Edward G.
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