JPS59131399A - 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 Field of the Invention The present invention relates to a steam iron that prevents water from accidentally dripping into a vaporizing chamber when the temperature of the iron base is low.

Structure of the Conventional Example and Its Problems In the conventional steam iron, water can be dripped from the water tank into the vaporizing chamber at any time regardless of the temperature of the iron base. Therefore, if you operate the steam without knowing that the temperature of the iron base is not high enough, the water dripping into the vaporization chamber will not be able to vaporize and will cause water to leak from the steam injection hole. was there.

OBJECTS OF THE INVENTION The present invention obviates the drawbacks of the prior art as mentioned above.
If the temperature of the iron base is low, make sure that water does not drip into the water tank or vaporization chamber regardless of whether or not steam is being operated, and use a steam iron that does not require water + 4. It is something we share.

Structure of the Invention The steam iron of the present invention includes a heat-sensitive element in the iron base, and further prohibits a solenoid valve that controls dripping of water from the water tank to the vaporizing chamber from being driven by a signal from the heat-sensitive element. Since it is equipped with a prohibition device, even if the steam operation is performed when the base temperature is low, the solenoid valve will not be activated and water will not leak. Further, when the 6M degree of the base portion is sufficiently high, the solenoid valve is driven in response to the steam operation.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In Fig. 1, 1 is an iron base, 2 is a temperature control device d,
3 is a heating element that heats the iron base 1, and its coupling is controlled by a temperature control device 2. Reference numeral 4 denotes a heat-sensitive element, which is heat-sensitively attached to the iron base 1 and detects its temperature. 6 is a solenoid valve. Reference numeral 6 denotes a steam inhibiting device, which prohibits the drive of the soldering valve 5 described in 1. by the output of the heat-sensitive element 4. Reference numeral 7 denotes a steam operating device, which operates the solenoid valve 6 to generate steam. Next, in FIG. 2, 8 is the iron body, and 9 is a vaporization chamber provided in the iron base 1, which is connected to a steam injection hole (not shown). A water tank 10 is provided at the upper part of the iron main body 8 and supplies water to the chamber 9 for vaporization. 11 and 12 are pipes for guiding water in the water tank 10 to the vaporization chamber 9, and their dripping into the vaporization chamber 9 is controlled by the solenoid valves 5 of these pipes. 13 is an f61J@board with a steam inhibiting device 6 and a steam operating device 7.

Next, one implementation of the steam inhibiting device 6 will be explained with reference to FIG.

Reference numeral 14 denotes an AC power source, which is connected to one end of the solenoid valve 5.

It has 11 elements, one end of which is connected to the AC power source 14V, and the other end connected in series to the solenoid valve 6.

16 is a DC power supply, which is connected to one end of the AC power supply 14. 17 is a resistor, a heat sensitive element 4 and a steam operating device 7
and a DC power supply 16 are connected in series. 18F! ,
This is an inverting element that is part of a logic integrated circuit.
A logic integrated circuit with MO8 structure is used. Inverted confectionery 1
．． The input terminal of the inverting element 8 is connected to the connection point between the resistor 17 and the heat-sensitive element 4, and the output terminal of the inverting element 18 is connected to one end of the resistor 19. Further, the other end of the resistor 19 is connected to the control terminal of the energization control element 15.Next, the operation of this embodiment will be explained.

In FIG. 3, the thermal element 4 is a thermistor with a negative characteristic, and exhibits a low resistance value when '/KJ is high, and exhibits a negative resistance value when the temperature is low.

When the steam operating device 7 is open, the input terminal of the inverted confectionery 18 is set to low 1/bell by the resistor 17, so the output of the inverted confectionery 18 becomes high level.

Therefore, the traffic control cape element 16 becomes non-conductive and the solenoid valve 5 is not driven. Next, a case where the steam operating device 7 is closed will be explained. The voltage of the DC power supply 16 is E(v
), the resistance value of the resistor 17 is R1□ (Ω), and the resistance value of the heat-sensitive element 4 when the temperature is T°C is RT (Ω), the reversing element 18 when the steam operating device 7 is closed The potential vin at the input terminal of is expressed by the following equation.

Here, since the inverting element 18 has a 0MO8 structure, the input '
The difference between the potential level and the low level is the own power supply voltage, that is, in this case, the DC power supply 160E (
It is approximately equal to the value of % of v). Therefore, the human power potential vin of the inverting element 18 is vin 2- E (v) ”' ”””(
In the case of 2), the input is an inverting element as a no-y level,
Accepted by F8 1) in <-E (v) -----(3)
At this time, the input is received by the inverting element 18 as a low level.

(1) Substituting Eq. When it's no level, Toki is at a low level.

Therefore, the four direct forces of RT change depending on the temperature of the heat-sensitive element 4, so at a certain temperature TO (°C) or higher, the input potential of the inverting element 18 becomes high level when the steam operating device 7 is closed, and the output is Become A-level.

As a result, a driving current flows from the DC power supply 16 to the control terminal of the energization control element 15 through the resistor 19, driving the solenoid valve 6, and water enters the vaporization chamber 19 from the water tank 10 to generate steam. Furthermore, when the temperature of the heat-sensitive element 4 (°C) or the temperature of the iron base 1 is lower than a certain temperature TO (°C), the input potential of the reversing element 18 is at a high level even if the steam operating device 7 is closed. Otherwise, the output is at a high level and the energization control element 15 is not driven, so the electromagnetic valve 5 is not driven, so water is not supplied to the vaporization chamber 9. The certain temperature 'ro ℃ here refers to the temperature at which the resistance value R・f of the heat-sensitive element 4 becomes RT ``''''+7, and the temperature is such that the water entering the vaporization chamber 9 can be sufficiently vaporized. Therefore, the value of R1□ should be less than or equal to the resistance value 'To of the I heat-sensitive element 4 at rO (° C.).

Effects of the Invention As described above, in the present invention, when the temperature of the iron base is low and water cannot be sufficiently vaporized, the steam inhibiting device stops the water injection into the vaporizing chamber.
No need to worry about water leaks. Therefore, it is possible to provide a steam iron that allows the user to operate the steam iron with peace of mind.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a steam iron showing an embodiment of the invention, and Fig. 2 is a sectional view of the same steam iron.
The figure shows the acid air circuit diagram of the same steam iron. 9... Vaporization chamber, 10... Wednesday evening/ri. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 5 Do 7 Figure 2

Claims (1)

[Claims] A heating element that heats the base of the iron, a temperature control device that controls energization to the heating element described in 01J, a vaporization chamber provided in the iron base, and a water tank that supplies water to the vaporization chamber. , a solenoid valve that controls dripping of water from the water tank into the vaporizing chamber, a steam operating device that drives the solenoid valve, a heat-sensitive element that detects the temperature of the iron base, and A steam iron comprising a steam inhibiting device that prohibits the steam operating device from driving the solenoid valve.