Electric resistance heating devices – Heating devices – Vaporizer
Patent
1996-06-10
1998-10-20
Walberg, Teresa J.
Electric resistance heating devices
Heating devices
Vaporizer
392386, 222644, 2221465, A01G 1306, A61H 3312, G04C 2300
Patent
active
058259759
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to multifunctional apparatus for spraying and fumigating a fluid.
More precisely, the invention relates to apparatus of the kind disclosed in documents EP-A-0 401 060 and WO-A 92/12801 in which a manual spray pump is actuated automatically by electromechanical means, thus making it possible, in particular, to obtain a fine pseudo-continuous spray when the electromechanical means are actuated repetitively at a high rate. A spray is thus obtained which is comparable to that of aerosols, or is even better, because it avoids the drawbacks thereof (harmfulness of Freons for the environment, danger for users when Freons are replaced by hydrocarbons).
Document EP-A-0 401 060 also discloses apparatus in which a manual pump is actuated by electromechanical means for spraying a finely atomized jet of fluid on a metal surface, and the metal surface is heated to a temperature that is higher than the vaporization temperature of the fluid so that said fluid is vaporized instantaneously in gaseous form, i.e. with a change of state. Below, the term "fumigation" is used for such vaporization. Fumigation advantageously replaces the use of aerosols for treating volumes of air with deodorants, insecticides, air fresheners, etc. . . . Since the fluid is converted to the gas phase, it disperses much better in the atmosphere than do aerosols which produce droplets in suspension in the air. As a result, it is possible to achieve the same result while using much less of said fluid than with an aerosol (Avogadro's Law), which is both cheaper and also better for human health and for the environment. Also, the fine droplets produced by the spray are vaporized instantaneously by the heated surface, so the fluid does not have time to be degraded by heat during vaporization and it therefore conserves all of its properties.
Certain fluids are suitable for use both in spraying and in fumigation. For example, an insecticide may be sprayed to have a fast localized effect on one or more insects, or it may be fumigated to treat the air in a room on a continues basis, e.g. throughout the night.
An object of the present invention is to provide apparatus of the above-mentioned type, but that makes it possible to perform both spraying similar to that of an aerosol and fumigation, depending on the kind of use desired.
Thus, the present invention provides a multi-functional apparatus for spraying and fumigating a vaporizable fluid, the apparatus comprising an actuator head, a tank containing said fluid, and a pump mounted on the tank, said pump having an outlet nozzle, actuating the pump and an electronic control and power supply circuit including a microprocessor for controlling said electromechanical actuator means, of the pump to receive said fluid sprayed by the pump and to vaporize it, said heater element having a temperature greater than the vaporization temperature of said fluid, said heater element being in communication with the atmosphere to exhaust said vaporized fluid, the operation of said heater element and for transmitting a signal to said microprocessor indicating operation of said heater element, said microprocessor being programmed to control actuation of the pump automatically at predetermined time intervals when it receives said signal indicating that the heater element is operating.
In a second embodiment, the invention defines a multifunctional apparatus for spraying and fumigating a vaporizable fluid, the apparatus comprising an actuator head, a tank containing said fluid, and a pump mounted on the tank, said pump having an outlet nozzle, actuating the pump and an electronic control and power supply circuit including a microprocessor for controlling said electromechanical actuator means, characterized in that: function of the apparatus in fumigation mode is disposed facing the outlet nozzle of the pump to receive said fluid sprayed by the pump and to vaporize it, said heater element having a temperature higher than the vaporization temperature of said fluid, said heater element being in communica
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Conceptair Anstalt
Paik Sam
Walberg Teresa J.
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