JP2792257B2 - Cordless iron - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless iron using an electronic circuit.

[0002]

2. Description of the Related Art In recent years, cordless irons for controlling temperature using electronic circuits have become mainstream.

Conventionally, this type of iron has generally been configured as shown in FIGS. In FIG. 5, 1 is an iron base, 1b is an iron body, 2 is a handle, and 3 is a water tank. 4 is a heater for heating the iron base 1, 5 is a vaporization chamber for converting water dropped from the water tank 3 into steam, 6 is a steam hole for injecting generated steam, and 7 is the temperature of the iron base 1. A temperature detecting element such as a thermistor for detection (hereinafter simply referred to as a thermistor).

Reference numeral 8 denotes a steam button for selecting whether or not steam is to be emitted. When the steam button is pressed downward, the valve 9 is opened, and when pressed again, the button is raised and the valve 9 is closed. Reference numeral 11 denotes an iron stand. When the iron main body 1b is placed on the iron stand 11, the power receiving terminal 12 of the iron main body 1b and the power transmitting terminal 13 of the iron stand 11 come into contact with each other. Can be energized. Reference numeral 14 denotes a temperature adjustment unit provided in the stand 11. Reference numeral 15 denotes a pulse generating circuit provided inside the handle 2, which converts a temperature detected by the thermistor 7 into a pulse. The higher the temperature detected by the thermistor 7 is, the shorter the pulse period is. The temperature adjusting unit 14 of the iron stand 11 detects the temperature of the iron base 1 by looking at the pulse period, and sets the temperature T0 degrees as a threshold. When the temperature detected by the thermistor 7 is lower than T0 degrees, the heater 7 is energized through the power transmitting terminal 13 and the power receiving terminal 12,
When the temperature is higher than T0 degrees, the temperature of the iron base 1 is controlled by stopping the power supply to the heater 7.

In FIG. 6, a power transmitting terminal 13 and a power receiving terminal 1
2 denotes three terminals 13a, 13b, 13c, 12
a, 12b, and 12c. When the iron body 1b is placed on the stand 11, 13a and 12a, 13b and 1c
2b, 13c and 12c are connected respectively. 12a and 12c are connected to the heater 4, 12b is connected to the output of the pulse generation circuit 15, 13a is connected to the relay contact 16, 13b is connected to the pulse signal input of the temperature control unit 14, and 13c is connected to the commercial power supply. The other end of the relay contact 16 is a commercial power supply 17
Is connected to the other end. Opening and closing of the relay contact 16 is controlled by the temperature adjusting unit 14. Pulse generation circuit 1
The temperature signal due to the pulse output from 5 is 12b of the receiving terminal and 1
2c, the temperature adjustment unit 14 is connected to the power transmission terminals 13b and 1b.
Receiving the pulse signal riding during 3c, the temperature of the iron base 1 is recognized. The temperature adjusting unit 14 controls the temperature of the iron base 1 by controlling the opening and closing of the relay contact 16 to supply or not supply the electric power from the commercial power supply 17 to the heater 4.

[0006]

With the conventional cordless iron, the temperature cannot be adjusted at all according to the method of ironing, and the cloth is damp or the wrinkles of the cloth cause the user to leave the stand for a long time and remove the iron. How to use , the temperature of the iron base surface drops considerably because it was used ,
For example, frequent steam spouts or ironed surfaces
The set temperature will change even if the cloth is wet.
I didn't. For this reason, the temperature at which the iron body cannot be used
To the set temperature.
After the temperature rises, until the temperature returns to the unusable state again
Uses less time than normal ironing
The temperature has reached an impossible level and ironing frequently
I had to refuse.

[0007] It is an object of the present invention to provide a cordless iron that solves the above problem.

[0008]

According to a first aspect of the present invention, there is provided a heater for heating an iron base of an iron body, a relay contact for opening and closing an electric current to the heater, and an iron base. A temperature detecting element such as a thermistor for detecting the temperature of the surface, a temperature adjusting section for controlling the relay contact from the temperature data of the temperature detecting element to adjust the temperature of the iron base surface, and using the temperature of the temperature detecting element. Difference between the temperature set by the user and the iron body
Of the current temperature information over time
The temperature gradient is calculated and used as input.
The drop temperature gradient is large and drops during ironing.
If the temperature is high , the temperature adjustment unit adds the correction value to the set temperature set by the user.

[0009]

According to the present invention, an ironing surface is provided by the above-described structure.
The user can set the status of
Temperature and the iron body on the iron stand
Difference between the base temperature of
Temperature gradient of iron base surface in ironing
More, the temperature correct the temperature at which the user sets the heating side
Determine the disturbance (ironing surface condition or ironing
It is possible to control the temperature setting of the base surface of the cordless iron, which is adaptable to the load fluctuation due to the use state .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, the iron body 1b
Is exactly the same as the configuration of the conventional example, and the iron stand is also partly the same. In the iron stand 21, a fuzzy inference unit 20 receives two inputs of temperature information (pulse) of the iron base from the terminal 13b and a set temperature from the temperature adjusting unit 14. The fuzzy inference unit 20 calculates the temperature drop from the set temperature information from the temperature adjustment unit 14 and the current temperature information from the iron main body 1b and uses it as the first input of the fuzzy inference, and calculates the temporal temperature of the current temperature information from the iron main body 1b. The temperature gradient of the iron base surface is calculated from the change and used as a second input for fuzzy inference. The inference output of the fuzzy inference unit 20 is passed to the temperature adjustment unit 14, and the temperature adjustment unit 14
To supply the AC power 17 to the heater 4 of the iron body 1b.
Is controlling the power supply.

The configuration and operation of the fuzzy inference unit 20 are as follows. The fuzzy inference is performed based on a rule such as "if the gradient of the temperature drop during ironing is large, and if the temperature drop during ironing is large, the correction temperature is considerably increased". The slope of the drop temperature is "large"
Or the drop temperature is "severe" or the correction temperature is "high"
Such a qualitative concept is quantitatively expressed by a membership function as shown in FIGS. The space of the temperature drop is divided into four, the space of the temperature drop is divided into four, and the output is divided into four spaces such as not increasing, slightly increasing, increasing and considerably increasing the output.

FIG. 3 shows a fuzzy rule table which defines 16 rules that "if the gradient is A and the temperature drop is B, the output is C". A1 to A4 in FIG. 3 correspond to each of FIG. 2A, and B1 to B4 in FIG.
Corresponds to each of FIG. 2 (b). Also, C11, C12, C21, and C31 in FIG. 3 correspond to C1 in FIG. 2C, and C13, C22, C32, and C42 in FIG.
Are C2 in FIG. 2 (c), C14, C23,
C33 corresponds to C3 in FIG. 2C, and C24 and C in FIG.
Reference numerals 34, C43, and C44 correspond to C4 in FIG. 2C, respectively.

FIG. 4 is a diagram for explaining the operation of the fuzzy inference device according to one embodiment of the present invention. The degree of conformity of the first input, that is, the reduced temperature value p, to the membership function relating to the reduced temperature is determined by the value of the point of intersection with each of the membership functions A1 to A4 as shown in FIG. It is Ga1 for A1, Ga2 for A2, and 0 for A3 and A4. The degree of conformity of the gradient value q, which is the second input, to the membership function relating to the gradient is obtained from the value of the point of intersection with each of the membership functions B1 to B4, as shown in FIG. G2 for B2,
It is Gb3 for B3 and 0 for B1 and B4. These are the degrees of conformity of the antecedent part of the fuzzy inference rule.

The consequent part of the fuzzy inference rule is Ga1 and G
C1 truncated at the minimum value of b2, Ga1 and Gb3
, C2 is truncated at the minimum value of Ga2 and Gb2, and C3 is truncated at the minimum value of Ga2 and Gb3, each of which is the conclusion of each rule. As a final conclusion, the value of the horizontal axis of the center of gravity of the figure in which the four trapezoids are overlapped is set as the correction temperature ΔT1. The corrected temperature value of the output obtained in this manner becomes a fine adjustment value of the set temperature of the iron, and the temperature obtained by adding the corrected temperature value ΔT1 to the previously set temperature T0 is set as a new temperature adjustment value.

According to the iron described above, when the cloth is damp or when a lot of steam is used and the temperature of the base surface suddenly cools, the temperature is automatically adjusted to a temperature higher than the set temperature. , Easier to iron. The fuzzy inference unit 20 and the temperature control unit 14 can be easily realized by using a microcomputer.

[0016]

As is apparent from the above embodiments, according to the present invention, the temperature of the base surface of the cordless iron is set based on the temperature decrease of the iron base surface during detachment of the cordless iron, so that the quick response is improved. In addition, it is possible to control the temperature setting of the base surface of the cordless iron that is adaptable to load fluctuations due to disturbance. In addition, since the parameters of the fuzzy inference device (normalized constants of input / output variables) and the fuzzy rule table can be easily adjusted by the designer empirically, it is possible to control the temperature setting of the base surface of the cordless iron, which is difficult to model. Are suitable.

[Brief description of the drawings]

FIG. 1 is a block diagram of a cordless iron showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an antecedent part and a consequent part of a fuzzy rule of the cordless iron.

FIG. 3 is a diagram of a fuzzy rule table of the cordless iron.

FIG. 4 is an explanatory diagram of an operation of fuzzy inference of the cordless iron.

FIG. 5 is a sectional view showing a configuration of a conventional cordless iron.

FIG. 6 is a block diagram of the cordless iron.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron base 4 Heater 7 Temperature detection element 11 Iron stand 12 Power reception terminal 13 Power transmission terminal 14 Temperature adjustment unit 15 Pulse generation circuit 16 Relay contact 20 Fuzzy inference device

────────────────────────────────────────────────── ─── Continued on the front page (72) Koji Takemoto, Inventor 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-285600 (JP, A) JP-A 64- 52500 (JP, A) JP-A-3-51097 (JP, A) JP-A-3-77595 (JP, A) JP-A-2-196000 (JP, A) JP-A-4-319397 (JP, A) JP-A-3-77594 (JP, A) JP-A-4-110,000 (JP, A) JP-A-4-180799 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D06F 75 / 08,75 / 26,75 / 40,79 / 02

Claims (1)

(57) [Claims] 1. A heater for heating an iron base of an iron body, a relay contact for opening and closing an electric current to the heater, a temperature detecting element such as a thermistor for detecting a temperature of an iron base surface, and a temperature of the temperature detecting element. A temperature adjustment unit that controls the relay contact from the data to adjust the temperature of the iron base surface; and a difference between the temperature of the temperature detection element and a set temperature set by a user, and a current temperature from the iron body.
The temperature gradient of the iron base surface from the temporal change of degree information
Using the calculated value as input, the temperature drop during ironing
High gradient and high temperature drop during ironing
A cordless iron which comprises a set temperature correcting means for considerably increasing the correction temperature if the temperature is high , wherein the temperature adjusting section adds the corrected value to a set temperature set by a user.