JPS59222199A - Steam iron - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] This invention relates to a steam iron.

[Technical background of the invention and its problems]

Conventionally, in steam irons, the needle 9P, which opens and closes the nozzle that communicates from the water tank to the vaporization chamber in the iron base, was manually operated to drip water into the vaporization chamber and stop the dripping, so it was difficult to open the nozzle. The amount of water dripped was determined by the diameter of the tube.

For this reason, there was a drawback that the amount of steam could not be varied. In addition, since the nozzle remains open during steam injection, air bubbles and dirt tend to adhere to the opening, making it difficult for water to drip smoothly. [Objective of the Invention] This EA eliminates these drawbacks. To provide a steam iron which is designed for the purpose of removing steam, is capable of varying the amount of water dripped into a vaporizing chamber, and is therefore capable of varying the amount of steam released, and is capable of smoothly dripping water. shall be.

[Summary of the invention]

In this invention, a vaporizing chamber is formed in an iron base heated by a heater, a water tank is attached to the top of the iron base, and a nozzle communicating with the vaporizing chamber is provided at the bottom of the water tank, and a needle valve opens and closes the nozzle. The needle valve of the valve is driven to open by a solenoid, and the duty ratio of one cycle of energization to the solenoid is variably controlled by a variable resistor.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, reference numeral 1 denotes an iron base, and this iron base l is formed with a vaporizing chamber 3 having steam discharge ports 2a and 2b provided at both ends. Further, a heater 4 and a negative characteristic thermistor 5 as a temperature detection element are housed in the iron base 1. Said iron base l
A circuit component storage s8 having a water tank storage section 6 at the front and a handle 7 at the rear is mounted on the upper part of the holder.

At the bottom of the water tank 9 of the water tank storage section 6, there is a pulp 12 consisting of a nozzle 10 that is delayed to the vaporization chamber 3, and a needle valve that opens and closes the nozzle 10'1 by vertical movement.
? ! The upper end of the needle valve 1 is attached to the lower end of the plunger 13, the spring 14 is attached to the upper end of the plunger 13, and the plunger 13 is attached to the upper end of the plunger 13. I-always need) L4f' 11 Castle 1oλ is biased in the direction of occlusion. A solenoid 1 is installed around the plunger 13.
5 is provided, and when the solenoid 15 is energized, the plunger 13 and the needle valve lI? The nozzle 105 is opened by raising it against the ll-spring.

FIG. 2 shows a circuit configuration in which a power switch 22 is connected to an AC power source 2 and an input terminal of a full-wave rectifier circuit 23 is connected to the AC power source 2. A smoothing capacitor 24 is connected to the blade terminal of the full-wave rectifier circuit 23. Front 1 self-smoothing condenser 24
A first voltage dividing circuit 27 formed by connecting a resistor 25° 26 in series, and a sliding variable resistor 28 as a temperature setting device.
and a second voltage dividing circuit 29 formed by connecting the thermistor 5 in series, and a third voltage dividing circuit 29 formed by connecting the thermistor 5 in series, and a third voltage dividing circuit 29 formed by connecting the thermistor 5 in series.
32 voltage divider circuits are connected to each other. A first relay 34 is connected to the smoothing capacitor 24 via a first NPN transistor 33, and the heater 4 is connected via a normally open contact point 34m of the first relay 34. There is. The connection point of the resistors 25 and 26 is connected to the comparator 3.
The connection point of the variable resistor 28 and thermistor 5 is connected to the non-inverting input terminal (-) of the comparator 35. The output terminal of the previous We comparator 35 is connected to the It is connected to the connection point of the resistors 30 and 31 and to the base of the first transistor 33.

The voltage dividing circuits 27 and 32 of the ml and ff13, the first transistor 33, the first relay 34, and the comparator 35 form a heater control circuit Mk. Furthermore, a second relay 37 is connected to the smoothing capacitor 24 via a second NPN transistor 36, and a normally open contact 37m of the second relay 37 is connected to the solenoid 15 above.
are connected. Furthermore, an astable multivibrator 39v is connected to the smoothing capacitor 24 via an operation switch 38.
il - connected. The astable multivibrator 3
9, the duty ratio of the oscillation period changes according to the setting of the variable resistor 40, and the output of the vibrator 39 controls on/off of the second transistor 36.

The second transistor 36, the second relay 37, and the astable multivibrator 39 form a solenoid control circuit.

The variable resistor 28 is used to set the temperature of the iron base 1, and by decreasing the resistance value, the set temperature is increased.

Like this W! In the detailed embodiment of the present invention, when the temperature of the iron base 1 is set using the variable resistor 28 and the power switch 22 is turned on, the temperature of the iron base 1 is initially low, so the resistance value of the two mister 5 is greatly compared. The output of the device 35 becomes high level. However, the first transistor 3
3 is turned on, the first relay 34 is operated, its normally open contact 34m is closed, and energization to the heater 4 is started. In this way, the iron base 1 is heated by the heater 4, and its temperature is completely increased. Due to this, the resistance value of scissor mister 5 decreases,
When the set temperature of the variable resistor 28 is eventually reached, the comparator 35
The output of the heater 4 is inverted to a low level, the first transistor 33 is turned off, and the power to the heater 4 is cut off. Thereafter, the first transistor 33 is repeatedly turned on and off depending on the temperature state of the iron base 1, and the power to the heater 4 is controlled to be turned on and off, and the temperature of the iron base 1 (7) reaches approximately the set temperature. I kept it.

When the operation switch 38 is turned on in this state, the astable multivibrator 39 starts operating.

The multi-byte transistor 39 oscillates with a duty ratio based on the resistance value of the variable resistor 40, and the second transistor 36
It operates by turning on periodically. Second relay 37
operates periodically, and the solenoid 15 operates periodically. Is it true that the needle valve 11 periodically opens and closes with respect to the thread 10? The water in the water tank 9 is repeatedly dripped into the vaporization chamber 3 and vaporized to the steam outlet 2a.

It is released from 2b. At this time, when the variable resistor 40 is variably operated, the duty ratio of the oscillation cycle of the multivibrator 39 changes, and the on-operation period of the second transistor 36 changes. As a result, the duty ratio of the energization cycle to the solenoid 15 changes, and the amount of water dripped increases or decreases. In this way, the amount of steam emitted can be arbitrarily varied, and ironing can be done with a fixed amount of steam depending on the condition of the fabric. Further, while the steam is being discharged, the needle valve 11 periodically opens and closes the nozzle 10, so that the nozzle hole is constantly cleaned by the needle valve 11. Therefore, even if gas dissolved in water turns into bubbles and adheres to the nozzle holes, or dust adheres to the nozzle holes, they are quickly removed, and there is no possibility that the nozzle holes will become clogged. Therefore, from the water tank 9 to the vaporization chamber 3
Water can always drip smoothly and steam can be released well.

In the above embodiment, a striped type variable resistor was used, but a plurality of resistors may be provided in parallel and the duty ratio may be changed stepwise by switching.

〔Effect of the invention〕

As detailed above, the present invention allows the amount of water dripping into the vaporization chamber that generates steam to be varied as desired, thereby making it possible to vary the amount of steam released, and to create a steam system that allows smooth dripping of water into the vaporization chamber. Irons can be provided.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention, and FIG. 2 is a circuit configuration diagram of the same embodiment. 1... Iron base, 3... fifth, 4...
・Heater, 9...Water tank, 10...Nozzle, 11
... Needle valve, 15... Solenoid, 36...
Second transistor, 37... Second relay, 39...
...Astable multivibrator, 40...variable resistor.

Claims (1)

[Claims] 1. A vaporization chamber formed in the iron base, a heater for heating the iron base, and an upper part of the iron pace. a water tank formed at the bottom of the water tank, a valve consisting of a nozzle formed at the bottom of the water tank and communicating with the vaporization chamber, a needle valve for opening and closing this nozzle, a solenoid for opening and driving the needle valve of this valve, and a valve for opening and closing the needle valve of this valve; This steam iron is characterized in that it takes advantage of a solenoid control circuit for periodically controlling the energization of the solenoid, and a variable resistor for fully variable duty ratio control of the cycle of energization of the solenoid by the solenoid control circuit.