Electric resistance heating devices – Heating devices – Vaporizer
Patent
1989-08-21
1991-05-07
Walberg, Teresa J.
Electric resistance heating devices
Heating devices
Vaporizer
392404, F24F 608, A61H 3312
Patent
active
050143379
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an electro-portable apparatus for the production of steam applied to a surface usable more particularly but not exclusively for ungluing wall coatings.
DESCRIPTION OF RELATED ART
The majority of presently known apparatus for ungluing wall coatings, such as wall paper, use a "steam plate" provided with a rubber pipe connected to a steam boiler which rests on the floor. Certain of these apparatus vaporize the water at a pressure close to atmospheric pressure and others at a pressure of 2 bars. Their operational autonomy ranges from 3/4 hr. to 2 hours, 30 mins. for powers of 1500 watts to 2000 watts, and they present a time for reaching vapour phase ranging from 20 to 35 mins. They are provided with pressure and absence-of-water safety means as well as safety means for pressure maintenance for the apparatus operating at 2 bars. These known apparatus are of relatively large dimensions whilst presenting a relatively mediocre thermal yield. The steam produced is accompanied by droplets of water, which humidifies the paper too much, bringing about, on the one hand, a delay in the rise of temperature to about 75.degree. C. and, on the other hand, a tendency of the paper to tear. Furthermore, these apparatus are relatively expensive and cannot reach a large public.
The use is also known of the "pressure cooker" for producing the steam which is conveyed via a rubber pipe connected to a "steam plate" which is found on the market. This device presents the same drawbacks as the above-mentioned apparatus, with, in addition, the dangers of knocking over and of explosion when gas cookers are used.
Different types of devices are furthermore known which use the capacity of retention of porous bodies for storing a mass of water which is vaporized when this water is heated to the desired temperature, by association of an appropriate source of energy with this porous body. These devices are principally characterized in that the liquid mass is stored in form impregnated in the porous body, with or without the presence of a mass of permanent liquid. In the case of the liquid being heated by passage of electrical current, different profiles of steam output may be obtained as a function of the density of the porous body chosen.
The present invention has for its object to overcome the drawbacks of the known steam generating apparatus by using the specific properties of the devices using a porous body for the retention of liquid to be vaporized and by adapting these devices in judicious manner.
SUMMARY OF THE INVENTION
To that end, this electro-portable apparatus for producing steam applied to a surface, usable more particularly but not exclusively for ungluing wall coatings, comprising a housing containing a porous body impregnated with the liquid to be vaporized and means for heating this liquid up to its temperature of vaporization, is characterized in that the housing is subdivided, by a partition wall, into two compartments, namely a rear closed compartment containing the steam generator itself, consisting of the porous body impregnated with liquid and the means for heating this liquid, and a front compartment forming a vaporization cavity or "steam plate", open to the outside, defined by a peripheral edge able to be applied on the surface adapted to receive the vapour, and in that openings are provided through the partition wall to allow the passage of the steam, produced in the rear compartment, towards and into the front compartment constituting the vaporization cavity or "steam plate".
The electro-portable apparatus according to the invention offers the advantage that its structure is particularly simple and that it comprises, in integrated manner, its reserve of liquid to be vaporized, allowing it for example an autonomy, without refill, of the order of 20 mins. for a low weight, the electrical control, the vaporization cavity or "steam plate" and a handle for holding the apparatus. This apparatus has a power of 1500 watts for example and it may be equippe
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A.R.M.I.N.E.S.
Walberg Teresa J.
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