Drying and gas or vapor contact with solids – Apparatus – For hair on head
Patent
1994-11-02
1996-04-30
Kwon, John T.
Drying and gas or vapor contact with solids
Apparatus
For hair on head
34202, 392385, A45D 2000
Patent
active
055113222
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is directed to a process for treatment of an object using a flow of hot air a hand-held air blower for carrying out this process.
A process for treatment of an object using a flow of hot air and a hand-held air blower for carrying out this process are known, e.g., from DE-A-25 35 853. A disadvantage of the known process and air blower consists in that the flow of hot air striking the object can have very widely differing high temperature values depending on the distance of the object from the hot air flow outlet opening of the hand-held air blower. Avoiding this disadvantage depends very much on the skill of the user of the hand-held air blower in maintaining the required distance with respect to the desired temperature of the hot air flow striking the object, the desired temperature being determined by feel. This is made even more difficult when various heat outputs are adjusted, since this necessarily changes the required distance.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a process for the treatment of an object using a flow of hot air and a hand-held air blower for carrying out this process which do not have the disadvantages mentioned above and in which the given temperature of the hot air flow striking the object can automatically be maintained at least approximately constant substantially independent from the distance between the object and the hot air outlet opening.
With these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a process for treating an object by a hot air flow directed on the object by a hand-held air blower provided with a heating device and a fan, in accordance with which the heating device is controlled proportionally as a function of distance between the air blower and the object.
In accordance with another feature of the present invention a hand-held air blower with a heating device is provided, wherein the hand-held air blower has a distance detecting device which has an output for determined measured distance values, proportional control signals for controlling an output control device are formed by a comparison device from the measured distance values and from a given temperature value of a temperature selector, and the output control device controls the heating device. are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows the basic operation of the process and hand-held air blower;
FIG. 2 is a block diagram illustrating the control of a heating device;
FIG. 3 is a block diagram showing the regulating of a heating device;
FIG. 4 shows a graph of heat output as a function of distance;
FIG. 5 shows a graph of heat output and blowing output as a function of distance;
FIG. 6 is a block diagram similar to that in FIG. 3, but, in addition, with a device for detecting whether or not a distance detection range has been exceeded;
FIG. 7 shows a distance detecting device;
FIG. 8 is a block diagram of the device according to FIG. 7;
FIG. 9 is a block diagram of a device for detecting the size of an object.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 illustrates the basic operation of the process for treating an object 1 by a hot-air flow 2 directed on the object 1 by a hand-held air blower 3 which is provided with a heating device 4 and a fan 5. The heating device 4 is controlled in proportion to distance S so that a given temperature of the hot-air flow 2 on the object 1 remains constant substantially independent from the distance between the hot-air outlet opening 8 of the hand-held blower 3 and the object 1. In an embodiment example, the heating device 4 is controlled by distance measure
REFERENCES:
patent: 4876435 (1989-10-01), Hawkins
patent: 5111594 (1992-05-01), Allen
patent: 5163234 (1992-11-01), Tsukamoto
patent: 5195164 (1993-03-01), Lambert
patent: 5404419 (1995-04-01), Artis, Jr.
Kwon John T.
Striker Michael J.
Wella Aktiengesellschaft
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