JPS62292200A - 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 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to an iron for general household use, and particularly to an iron that prevents the user from forgetting to turn off the power.

BACKGROUND OF THE INVENTION Conventionally, there has been an iron that prevents this type of forgetting to turn off the power by detecting the movement of the iron during use to detect whether the iron is in use or not in use.

That is, a combination of an optical sensor and a ball utilizes the movement of the ball due to the movement of the iron to turn the optical sensor signal ON or OFF (to determine the usage state).

Problems to be Solved by the Invention The conventional iron as described above requires a sensor for determining use/non-use, which is disadvantageous in terms of cost and implementation.

The present invention has been made to solve the above-mentioned conventional problems, and does not require a sensor to determine whether the iron is in use or not, and is highly effective in determining whether the iron is in use or not. To provide an iron with a prevention mechanism.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention does not particularly have a sensor for determining use/non-use status, but is provided with a temperature detection element for temperature control and yet another temperature detection element, The number of either one of the two temperature sensing elements is calculated to determine whether the iron is in use or not.

Function The present invention turns on the heater provided in the iron base based on a signal from the temperature detection element provided in the iron base.
The iron base is maintained at a constant temperature through OFF control, and the ON and OFF times are counted to determine whether it is in use or not.

That is, when the iron is in use, the base surface is cooled by clothing, so the ON time is long (the OFF time is short), and the ON time varies widely.

When not in use, the ON time is short and the variation is small.

In particular, if there is only one temperature sensing element, this method will malfunction when the iron is used in a steam state.

Therefore, we use two temperature detection elements to prevent malfunctions when using steam and ensure reliable use.

This is to detect the state of non-use.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram, and numeral 1 represents a heater, which heats the iron base 2. Said iron base 2
Associated with the evaporation chamber inside is a water tank 3 for dripping water to generate steam when the iron is used in a steam state.

A first temperature detection element 4 is provided at a location that is not easily affected by steam, such as the tip of the iron base, and a first temperature detection element 4 is provided near the center of the iron base 2, and the temperature of the surface of the iron base 2 is controlled by its signal. A second temperature sensing element 6 is provided. The second temperature sensing element 5 is easily influenced by steam, and can detect a sudden drop in the temperature of the base surface when steam is generated.

A power control device 6 is inserted into the energization circuit of the heater 1.
This power control device 6 functions to keep the temperature of the iron base surface constant by turning the heater 1 on and off in response to a signal from the second temperature sensing element 55=4'. The arithmetic control device 7 calculates the signals of the second temperature sensing element 5 and the power control device 6, that is, the ON time of the power control device 6, the O
When the FF time is calculated and it is determined that the user has forgotten to turn off the power, a signal is sent to the power control device 6 to turn off the heater 1.

FIG. 2 shows an embodiment of the temperature control circuit.

Rth is a temperature sensing element, in this case a thermistor. R1, R2, R3 are resistors, and temperature sensing element R
Together with th, it constitutes a bridge circuit. IC1 is a comparator, and the divided voltage of Rth and R1 - and R2 and R
3 divided voltage■. is compared with. As the temperature of the iron base surface increases, the resistance value of Rth decreases and the voltage V- increases.

When the temperature is low and - is smaller than V+, the output voltage of the comparator IC is high level, and the transistor Q1
A base current flows through the resistor R5 from the output of the transistor C1 to the base of the transistor Q1, and the transistor Q1 is turned on. A coil of relay RL6 is connected to the collector of transistor Q, and when transistor Q1 is turned on, relay RL is also turned on.

Contact portion 9 of relay RL is turned on when RL is turned on, and current flows from power source 8 to heater 1 to heat the heater. When the base temperature of the iron rises, (2) becomes higher and V- becomes larger than V1, the output of the comparator E C1 becomes low level, the transistor Q1 is turned off, and the relay RL is also turned off. Therefore, contact 9 also opens, cutting off the current to heater 1.

FIG. 3 shows this heater temperature control state.

t is the heater temperature. vR is the voltage across the relay coil, and when it is at a high level, the relay RL is ON, and when it is at a low level, the relay RL is OFF.

Fig. 4 is a diagram of the iron body, 15 is an iron base with a built-in heater, 12 is a water tank, 14 is a hole for dripping water into the evaporation chamber 16 provided in the iron base, and 13 is a water droplet in the evaporation chamber 16. When the rod 13 is raised, a hole opens and water drips. When the rod 13 is lowered, the hole closes, water stops dripping, and steam generation stops.

17 is steam. 11 is a handle part, and 1° is a power cord.

FIG. 6 is a view of the base surface of the iron.

1 is the heater, tl is the temperature at the center of the iron base surface, and the signal detected by the temperature detection element 2 is sent to the power control device 6, which turns the heater 1 ON and OFF.
L Performs temperature control. Furthermore, the temperature t1 is easily affected by steam because the evaporation chamber is nearby, and when steam is generated, tl drops rapidly.

The temperature t2 is the temperature at the tip of the iron base surface, and is not affected by the steam too much.

The operation of one embodiment of the present invention will be explained with reference to FIG.

When the power is turned on at the start, the relay is turned on and the heater temperature rises (18°) b The temperature detection element detects this, and when the predetermined temperature is reached, the relay is turned off. Time T until this relay turns OFF for the first time. Measure and remove this.

When the base temperature drops, the relay turns on again.

At this time, take temperature data 11.12 at the center and tip of the iron base surface. When the temperature rises and exceeds a predetermined temperature, the relay turns OFF, and the base surface temperature decreases.
The relay is turned on again. Relay is ON l,, OFF
The time for this is defined as one cycle, and the time T of this one cycle is measured. Data T1 for 3 cycles of this ON/OFF cycle. T2. Take T3.

3 cycle data, T1. T2. It is checked whether there are two or more pieces of data in T3 for longer than the specified time (in this case, 2 minutes).

If the time has exceeded the specified time, it is determined that the iron is not in use. If there are no items exceeding the specified time for two or more items, it is determined that they are in use (26).

When in use, (temperature t2 at the tip of the base) - (
The temperature t1) at the center of the base is calculated (28). If this is positive, it is determined that the device is used without generating steam (hereinafter referred to as dry use). Next, the relay ON or relay OFF time t/ at the center of the base and the relay ON or relay 0FF9 header time at the tip of the base (corresponding to the temperature at which the relay turns ON or OFF) t4 are measured, and A=(t4 -tl) OFF
(t6-tl) Compute ON. 3 to the result of this operation
data, A1゜A2. Obtain A3 (30). A4.
A2. The sum of squared deviations SA of A3 is calculated (31).

Check whether SA is larger than a certain specified value B.

If SA>B, it is judged to be in use; if SA<B, it is judged to be unused. Returning to step 28, 12-11 is moxibustion, 1
If so, it is determined that it is being used with steam. Following the same algorithm as the next drying, it is determined whether it is in use or not in use in the steam state.

If it is determined that the heater is not in use and the power is on for a certain period of time, it is determined that the power has been forgotten to be turned off, and the heater is turned off to 0F.
F-.

As described above, with this configuration, it is possible to detect the use or non-use state using the temperature control signal without providing a separate use/non-use detection switch, and it is also possible to reliably detect the use/non-use state even in a steam state. , it is possible to perform forget-to-disconnect detection that is inexpensive and easy to use.

Go to 10-1. Effects of the Invention As is clear from the above embodiments, according to the present invention, whether the iron is being used in a dry state or in a steam state, a temperature sensing element can be used to determine whether the iron is in use or not. It is possible to reliably determine whether the iron is present, and to provide an easy-to-use and safe iron.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is an example of a temperature control circuit, Fig. 3 is a base temperature characteristic during temperature control, Fig. 4 is a diagram of the iron body, and Fig. 5 is an iron. FIG. 6 is a flowchart of an example of detecting whether the base is in use or not in use. 1... Heater, 2... Iron base, 3... Water tank, 4... First temperature sensing element, 5... Second temperature sensing element, 6...
...Power control device, 7... Arithmetic control device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 6 Figure 5

Claims (1)

[Claims] A power control device includes a heater for heating the base of the iron, a water tank for steam generation, and a temperature detection element at two locations at the base of the iron, and controls the heater using a signal from either temperature detection element, and a power control device. It has a function that calculates the signal from the device and the signal from the other temperature sensing element, determines whether the iron is in use or not in use, and turns off the heater when it is determined that the iron is not in use. iron.