JPH029760Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hand dryer that allows wet hands to be placed under the air outlet and dried by warm air blown out from the air outlet.

Generally, this type of dryer uses a heater to heat the air sucked into the main body of the dryer by an air blower, and then blows out dry hot air from the air outlet for a certain period of time. It is designed so that when you put your hand out, the hot air blows out to dry your hand.

However, in conventional hand dryers, in order to dry wet hands as quickly as possible, the air sucked in from the blower is instantly heated by a heater to a temperature suitable for drying. In order to maintain this during the drying period, a heater with a large heater capacity (for example, 1KW) was required. However, using a large-capacity heater for a hand dryer is difficult in a typical household because of its contract current (for example, 15A,
This was difficult because there was a risk of exceeding the limit (20A contract, etc.). For this reason, it is possible to reduce the capacity of the heater to a certain extent and use it within the contracted current, but in this case, the temperature of the hot air is low, so it takes time to dry, and the longer drying time takes longer, the lower the electricity consumption. This is extremely uneconomical as consumption also increases.

In view of the above points, the present invention enables use within the contracted current range in general households, and when drying wet hands, first blows off water droplets on the hands with a strong wind. Next, we provide a hand dryer that can remove moisture from hands with warm air and dry wet hands economically in a short time and with low power consumption. To explain this with a diagram, 1 is an outer box of the hand dryer of the present invention, and this outer box 1 is made of a thin metal plate or heat-resistant resin. Hot air exhaust passages 3 communicating with the lower front side of the storage chamber 2 are provided as an integral structure. 4 is fan 5
The fan 5 faces the hot air discharge path 3, and the motor 6 is installed on the floor 2a of the blower storage room 2 via the mounting legs 6a, thereby making the blower storage room 2 more compact. It is stored in. The electric blower 4 is provided to rotate at high and low speeds by switching a resistor 8 attached to the outer periphery of the case of the electric motor 6 to adjust the rotational speed of the electric motor. 4, its rotation time is set by timers T1 and T2. 9 is a heating heater 1 on the bobbin 10
1, and is suspended and held in the hot air discharge path 3 via a mounting arm (not shown). 1
2 is a hot air outlet opened with the lower end of the hot air exhaust passage 3 being slightly constricted; 13 is a plurality of air inlets opened in the side wall of the hot air storage chamber 2 located at the electric motor 6; 14 is a power supply terminal; 15 is a temperature fuse. In addition, the heating heater 11 has a low capacity (for example, one
Two heaters (approximately 200 W) are connected in parallel to the power supply terminal 14, and a heater changeover switch 16 is interposed between the two heaters 11.

In addition, the outer box 1 is a wall 17 near the washstand (not shown).
It is attached via a support arm, etc.

Next, to explain the operation, first, the power supply terminal 14 is connected to a power supply (not shown). Next, when drying wet hands, the waterproof push-button switch 18 is turned on, and the relay X is energized, its normally open contact Xa is closed, and the electric blower 4 and timer T1 are started. At this time, as a result of the current being directly applied to the electric motor 6 from the power terminal 14, the electric blower 4 immediately rotates at high speed and strong wind with a wind speed of about 35 to 40 m/sec is discharged from the hot air outlet 12.
This strong wind forces the water droplets on the surface of your hands to be blown away. This strong wind discharge time is set by a timer T1, and the set time is about 10 seconds. This is because if you expose your hands to strong winds for any longer than this, your hands will hurt from the strong winds. After removing water due to strong wind, timer T
1 closes the normally open contact T1a provided in the circuit of the heater 11, and conversely closes the normally open contact T1a provided in the circuit of the heater 11.
Open the normally closed contact T1b in the circuit. For this reason,
The heater 11 is energized to generate heat, and the electric blower 4 is energized via the resistor 8, so that the electric blower 4 is switched to low speed rotation. As a result,
Air flowing in from the air inlet 13 is introduced into the hot air exhaust path 3 and heated by the heater 11.
The wind speed becomes hot air from the hot air outlet 12 at a speed of 25 to 30 m/
The hot air will be discharged in the form of hot air of about 100 sec.
The hot air removes water droplets from the hands, and since only the moisture needs to be removed, the hands can be dried efficiently and in a short time. Note that the hot air discharge time is set by a timer T2, and the set time may be about 20 seconds. When the set time of the timer T2 ends, the normally closed contact T2b opens to cut off the power to the relay X, and the normally open contact Xa of the relay X opens to cut off the power to the electric blower 4 and the heater 11. When the drying is completed within the time set by the timer T2, the user may turn off a power switch (not shown) to cut off the power to the electric blower 4 and the like.

Although the present invention has been described with reference to an example in which the push button switch 18 is used to start the electric blower 4, instead of using the push button switch 18, the electric blower 4 may be started when the pedal is depressed, or the infrared rays may be blocked by hand. Then, a photoelectric switch may be activated to start the electric blower 4.

In addition, in the case of discharging strong air from the hot air outlet, the present invention uses a small compressor C as shown in Fig. 3.
and the hot air outlet 12 are connected by a connecting pipe 19, and compressed air of a required pressure is supplied from the compressor C to the hot air outlet 12 only when strong wind is being discharged, and the hot air is then flowed from the hot air outlet 12 at a wind speed of 35 to 35. 40m/
It may be possible to discharge strong wind of about sec.

Since the hand dryer of the present invention is constructed as described above, it produces the following effects.

(1) In the initial stage of drying, the hand dryer uses strong wind to forcefully blow away water droplets on the hands, and then blows hot air that has been heated to the required temperature and at a slightly lower wind speed. Since the device is configured to dry moisture from hands, the time required to dry wet hands can be significantly shortened compared to the conventional method. Moreover, switching from strong wind to weak wind and energizing the heater can all be done automatically by a timer device, which is very convenient.

(2) Also, since the water droplets on wet hands are removed by strong wind during the initial stage of drying, a large-capacity heater is required to dry hands with warm air. Because you can sufficiently dry your hands with a small-capacity heater,
As a result of this idea, the capacity of the heating heater is inevitably small, and as a result, the hand dryer of this idea can be used in ordinary households without being restricted by the contracted current. Since the blower is energized only when it rotates at low speed, it is economical because power consumption can be significantly reduced compared to conventional hand dryers.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of the hand dryer of the present invention, FIG. 2 is an electrical wiring diagram, and FIG. 3 is a schematic diagram showing another embodiment of the present invention. 1...Outer box, 2...Blower storage room, 3...Hot air exhaust path, 4...Electric blower, 9...Heating heater, T1, T2...Timer.

Claims (1)

[Scope of utility model registration request] An electric blower that can switch speeds in multiple stages is attached to an outer box, a blower storage chamber formed at the upper part of the outer box, and a blower is installed at the bottom of the blower storage chamber corresponding to the position where the fan of this electric blower faces. A hot air exhaust path is formed to communicate with the storage chamber, and a heating heater installed vertically within this hot air exhaust path is opened and closed for a predetermined period of time to select the rotation speed of the electric blower and to control the energization time to the heating heater. The electric blower rotates at high speed for an appropriate period of time in the early stage of drying, and then rotates at low speed for an appropriate period of time, and the heater is energized by the timer device when the electric blower is operating at low speed. A hand dryer that is characterized by: