JP2847304B2 - Control method of hot air temperature in hot air drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to hot air drying in which a hand held over a predetermined position is detected by a sensor, and a fan and a heater are driven to discharge hot air to the position of the hand. The present invention relates to a method for controlling hot air temperature in an apparatus.

[Conventional technology]

Conventionally, a hot air drying device uses a fan driven by a motor to rotate air heated by a heater when a hand is sensed, and a predetermined air volume is set regardless of the wetness of the user's hand. It has a structure in which hot air is discharged, and the amount of heat applied to the hot air is always constant, so that the user's thermal sensation is not constant and the dry sensation is not clear.

[Problems to be solved by the invention]

Thus, as shown in FIG. 1, the temperature change of the surface of the hand obtained by blowing hot air on the wet hand can be expressed as follows, assuming that I is the surface temperature of the hand before being wet with water. The temperature drops to the temperature indicated by II, and when the discharge of warm air is started from this temperature, the heat of vaporization is quickly taken away from the surface of the hand. During the time A during which the heat of vaporization is larger than the heat applied by the warm air, the surface temperature of the hand further decreases to reach the lowest temperature III. When the moisture on the surface of the hand evaporates and falls below a predetermined value, the surface temperature of the hand gradually rises B due to the heat of the hot air blown, and finally reaches the temperature I before wetting with water, and the hand continues to be held as it is. If it is, the surface temperature of the hand further rises and continues to dry.

Therefore, in the range A, the air is generally felt cold, and in the range C, the air is felt hot, so that there is a problem that a comfortable drying atmosphere cannot be obtained, and the time required for drying becomes long.

The present invention has been made in view of the above problems,
It is an object of the present invention to propose a method of controlling a hot air temperature in a hot air drying device that can dry a hand comfortably and in a short time without strongly giving a “cold” or “hot” feeling during drying.

[Means for solving the problem]

In order to achieve the above object, a method for controlling a hot air temperature in a hot air drying apparatus according to the present invention includes the steps of: sensing a hand held over a predetermined position by a sensor; In a hot air drying apparatus for discharging air, an electric motor capable of controlling a rotation speed of a fan in a plurality of stages and a heater capable of switching an amount of heat for heating the air supply by the fan in a plurality of stages are provided, and the sensor senses from the sensor. For a predetermined time after inputting the signal, the motor is rotated at a low speed and the heater is switched to a high temperature for a predetermined period of time. The point is that the heater is switched to a low temperature while the motor is rotating at a high speed until the sensing signal disappears.

FIG. 2 is a block diagram showing an example of a configuration for realizing the method.

In the drawing, reference numeral 9 denotes a 2P / 4P switchable condenser motor for rotating the sirocco fan 10 in order to obtain air to be discharged from the hot air discharge port 13; The change is controlled, and the air volume from the hot air discharge port is switched between two levels of “strong” and “weak”. Reference numeral 14 denotes a heater for ventilation heating, which is a double filament 14a, 14b. The switch 8 is controlled by the controller 8 to control the switch 15, and one or two filaments are energized to adjust the temperature of the discharge temperature. "High", "low"
It is configured to switch to two stages. The controller 8 has a sensor 5 for detecting that a hand is at a predetermined position.
A timer 81 that starts counting in response to the input of a sensing signal from the controller has a built-in timer 81, which is controlled and driven in accordance with a timing chart (see FIG. 3) showing a preset hot air discharge program according to a lapse of a preset time (count). .

That is, in comparison with the graph of FIG. 1, the temperature of the discharged hot air is larger than the heat to which the heat of vaporization is applied, and A (about 5 seconds) while feeling "cool" and B during the time required for general drying. (Approximately 20 seconds), the temperature of the heater 14 is set to be "high" and then the temperature of the time C is set to be "low". A (approximately 5 seconds) while feeling greater than heat and feeling "cold" is "weak", and B (the 20th
Second) and then the time of C becomes “strong”
Are set respectively.

Note that the setting of the parenthesized time is an example of the implementation of the hot-air drying device according to the present invention, and can be appropriately changed according to the driving capability of the device.

[Action]

Therefore, the temperature of the hot air actually discharged depends on the heater.
By the combination of the temperature setting of 14 and the air volume setting of the electric motor 9, the maximum temperature H is maintained between A and the intermediate temperature between B as can be seen from the temperature T of the discharged hot air in the timing chart of FIG. A relatively low temperature L is maintained between M and C.

〔Example〕

Hereinafter, an embodiment of a method for controlling a hot air temperature in a hot air drying apparatus according to the present invention will be described with reference to the drawings.

FIG. 4 is a partially cutaway longitudinal sectional view showing a hot-air drying device provided with a hot-air temperature control device according to the present invention. This is a case of the hot air drying device having the above configuration. The device housing chamber 3 houses various components such as a hot air blower unit 4, a sensor unit 5, a germicidal lamp unit 6, a power switch 7, and a controller 8. The front cover 2 forms a substantially semi-cylindrical device accommodating chamber 3 for accommodating the electric motor 9 of the hot air unit 4, and has a sirocco type fan 10 of the hot air unit 4 built in below the chamber. An exhaust duct 12 communicating with the blower case 11 is formed, and a warm air discharge port 13 is formed at a lower end thereof. Also, hot air outlet
13 is provided with a sensor unit 5 facing a predetermined position below the hot air discharge port 13, that is, a hot air discharge position.
A terminal block (not shown) connected to the power switch 7 is fixed inside, and these components are covered by the front cover 2 from the front. In this embodiment, the controller 8 is fixed to the outer surface of the blower case 11 of the hot air blower unit 4.

The hot air blower unit 4 has a blower case 11 and a sirocco type fan 10 rotatably mounted on a drive shaft of a condenser motor 9 capable of switching between 2P / 4P. The condenser motor 9 is switched by switching 2P / 4P. The number of revolutions is controlled to change the air volume from the hot air discharge port 13. Also, the exhaust duct 12
The heater 14 for ventilation heating provided therein has double filaments 14a and 14b as described above. By controlling the switch 15 by the controller 8, the heater is energized to one or two filaments. The temperature of the discharged hot air can be changed.

In the description of the above embodiment, a 2P / 4P switchable capacitor-type motor is shown as a motor whose rotational speed can be controlled to be switched in a plurality of stages. However, the present invention can be implemented by tap-switching type or inverter-switching type control. Further, it is also possible to adopt a configuration in which switching is performed not in two steps but in multiple steps as in the present embodiment, and fine control is performed. This is the heater
The same applies to the structure of the fourteenth embodiment, and it goes without saying that a more detailed control can be performed by switching to a multi-stage instead of the two-stage by the double filament.

〔The invention's effect〕

Since the method for controlling the hot air temperature in the hot air drying device according to the present invention is configured as described above, the amount of hot air and the temperature of the hot air discharged toward the hand held below the hot air discharge port are controlled. The purpose of drying can be achieved in a short time without giving the user an extreme thermal sensation by changing it according to a preset program, and the effect of the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a graph showing a temperature change on the surface of a hand when hot air is blown on a wet hand, and FIG. 2 is a configuration of a hot-air drying device for realizing a hot-air temperature control method according to the present invention. FIG. 3 is a timing chart showing control of a controller of the apparatus and an operating temperature, and FIG. 4 is a block diagram showing a hot air drying apparatus provided with a hot air temperature control device according to the present invention. It is the longitudinal cross-sectional view which cut out partly. 4 ... Hot air unit, 5 ... Sensor unit 8 ... Controller, 9 ... Electric motor 10 ... Fan, 13 ... Hot air discharge port 14 ... Heater, 15 ... Switch

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor: Mitsuhiro Higuchi 5-1-1, Kushiamihigashi, Kokuraminami-ku, Kitakyushu-shi, Fukuoka Tokoki Co., Ltd. Kokura 2nd Plant (72) Inventor: Hiroshi Yamamoto Kitakyushu, Fukuoka 5-1-1, Kamiami-Higashi, Kokura-minami-ku, Tokyo Tokura Equipment Co., Ltd. Kokura 2nd Factory (56) References JP-A-62-233125 (JP, A) Full-scale operation 60-29595 (JP, U) 61-179994 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47K 10/48

Claims (1)

(57) [Claims] 1. A hot-air drying apparatus which senses a hand held over a predetermined position by a sensor and drives a fan and a heater to discharge hot air to the position of the hand. A motor capable of switching the amount of heat for heating the air supply by the fan in a plurality of stages, and rotating the motor at a low speed for a predetermined time after inputting a sensing signal from the sensor and setting the heater at a high temperature. The motor is rotated at a high speed with the heater at a high temperature for a predetermined period of time during the subsequent drying period, and the heater is switched to a low temperature with the motor at a high speed until the sensing signal from the heater is extinguished thereafter. A method for controlling hot air temperature in a hot air drying apparatus.