JPH0523498A - Iron - Google Patents

Abstract

PURPOSE:To always iron clothes at a desired temperature by the deriving temperature gradient of a base, based on a detected base temperature, and changing a set base temperature, based on its result. CONSTITUTION:The temperature of a base is detected by a temperature detecting means 1 and inputted to a heating control means 6 and a temperature gradient detecting means 2. The temperature gradient detecting mans 2 detects a temperature at the time of temperature rise or fall, based on the inputted base temperature and inputs it to a set temperature changing means 5. On the other hand, the set temperature changing means 5 receives a set base temperature, and a state signal of posture and an operation, etc., of an iron main body, from a temperature setting means 3 and a state detecting means 4, respectively. Subsequently, the set temperature changing means 5 changes a set temperature in accordance with the temperature gradient, based on these input signals. That is, in the course of electric conduction to a heater, a control temperature is heightened as a positive temperature gradient becomes small, and when the electric conduction stops, the control temperature is heightened as a negative temperature gradient becomes large. Next, a heating control means 6 controls a heating means 7 at this set temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron for changing a preset temperature of a base according to an ironing condition.

[0002]

2. Description of the Related Art In a conventional iron, when the temperature is set to a desired temperature, the energization of a heater is controlled so that the temperature of the base becomes a set constant temperature (for example, JP-A-58-112588). Issue). However, if your clothes are damp, iron with steam, or move the iron body frequently,
Since the amount of heat taken from the base increases and the temperature of the ironing surface continues to be lower than the set temperature, there is a problem that if the set temperature is fixed, ironing at the desired temperature cannot be performed.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above problems and provides an iron which can be ironed at a desired temperature regardless of the state of ironing.

[0004]

According to a first aspect of the present invention, there is provided heating means for heating a base of an iron body, temperature detecting means for detecting the temperature of the base, and temperature setting means for setting the temperature of the base. In an iron provided with a control means for controlling the heating means based on the temperature set by the temperature setting means and the temperature detected by the temperature detecting means, in the iron according to the output of the temperature detecting means, The temperature gradient detecting means for obtaining the temperature gradient at the time of temperature decrease and the set temperature changing means for changing the temperature set by the temperature setting means based on the output of the temperature gradient detecting means are provided.

A second aspect of the invention is a heating means for heating the base of the iron body, a temperature detecting means for detecting the temperature of the base, a temperature setting means for setting the temperature of the base, and the temperature setting means. In an iron provided with a control means for controlling the heating means based on the temperature detected by the temperature detection means and the temperature detected by the temperature detection means, a state detection means for detecting the movement of the iron body, and an output based on the output of the state detection means In addition, the set temperature changing means for changing the temperature set by the temperature setting means is provided.

[0006]

According to the first aspect of the present invention, based on the output of the temperature gradient detecting means, when the gradient of the temperature increase is gentle even during the heating, or when the gradient of the temperature decrease is steep while the heating is stopped. , It is judged that the temperature of the ironing surface is lowered by ironing wet clothes or ironing with steam, and the temperature of the ironing surface is changed by changing the set temperature of the base higher than the initial setting. Prevent decline.

According to the second aspect of the invention, based on the output of the state detecting means, when the iron main body moves rapidly, the total area of clothes contacting the ironing surface of the base is large,
Judging that the temperature of the ironing surface has dropped, change the set temperature of the base higher than the initial setting to prevent the temperature of the ironing surface of the base from dropping.

[0008]

1 is a block diagram of the present invention, in which 1 is a temperature detecting means for detecting the temperature of the base, and 2 is a temperature gradient when the temperature of the base rises and when the temperature falls based on the output of the temperature detecting means 1. Temperature detecting means for detecting the temperature of the iron body, 3 is temperature setting means for arbitrarily setting the temperature of the base, 4 is state detecting means for detecting the attitude and movement of the iron body, 5 is the temperature inclination detecting means 2, and the state detecting means. Set temperature changing means for changing the temperature set by the temperature setting means 3 based on the output of 4, and 6 compares the temperature output by the set temperature changing means 5 with the detected temperature of the temperature detecting means 1 for heating. It is a heating control means for controlling the means 7.

FIG. 2 is a concrete circuit diagram showing an embodiment of the present invention. 8 is a DC power supply circuit for supplying a predetermined DC voltage to each section, and 9 is a one-chip type which operates according to a predetermined program. It is a microcomputer. The microcomputer 9 constitutes a part or all of each of the above means. Reference numeral 10 is a heater for heating the base, 11 is a control resistor that reduces the amount of heat generated by the heater 9, 12 is a normally open switching relay that short-circuits both ends of the control resistor 11, and 13 is heating control that disconnects the heater 10. Relay for. Reference numeral 14 is a detection sensor for detecting the attitude and movement of the iron body, and is configured to detect the movement of the ball inside the case by a light emitting and receiving sensor. Reference numerals 15 and 16 denote first and second thermosensitive elements for detecting the temperature of the base, which are constituted by a thermistor or the like. 17 is a temperature setting switch for setting the temperature of the base, 18
Is a steam switch for switching between steam and dry, 19 is a liquid crystal display for displaying temperature, and 20 is a buzzer. Reference numeral 21 is a timer circuit, and 22 is a solenoid for controlling the water supply for steam.

Next, the structure of the iron main body will be described with reference to FIG. 3. Reference numeral 23 is a base in which the heater 10 is embedded, and has a steam generating chamber 24 and a steam ejection hole 25. First and second heat sensitive elements 15 and 16 are arranged on the base 23 so as to sandwich the team generating chamber 24. In particular, the first thermosensitive element 15 is attached to the tip portion of the base 23 where the clothing and the base 23 first contact each other when ironing, that is, at a position where the temperature of the clothing itself can be easily detected.

Reference numeral 26 is a base cover for covering the base 23 and 2
Reference numeral 7 denotes a handle body fixed to the base cover 26, and 28 denotes a hollow grip portion provided on the handle body 27. A printed circuit board 29 is arranged in the grip portion 28, and the microcomputer 9, the detection sensor 14, the setting switch 17, the steam switch 18, the liquid crystal display 19 and the like which constitute the above-mentioned circuit are attached.

A water tank 30 is provided between the base cover 26 and the handle body 27 and has a nozzle 31 at the bottom.
The nozzle 31 is opened and closed by the opening / closing body 32, and the opening / closing body 3
The reference numeral 2 moves up and down via a lever 34 that operates on a seesaw by a shaft 33 of a solenoid.

Next, the operation will be described. First, by pressing the setting switch 17, "High / Steam",
"Medium" and "Low" temperature settings can be selected. Here, "High
When "Steam" is set, the microcomputer 9 stores the setting by an internal flag, blinks the position indicating "High / Steam" on the display 19 and controls the base temperature (200 ° C) corresponding to "High / Steam". ) Is initialized to the internal temperature storage section. Then, the relay 13 is controlled so that the base temperature detected by the heat sensitive element 15 becomes the control temperature, and the heater 10 is energized. When the temperature of the base 23 reaches the control temperature, the display 19 and the buzzer 20 notify that the temperature has reached an appropriate temperature, and then the relay 13 is turned on / off to maintain the control temperature.

When the temperature is set, the microcomputer 9 determines the base 23 based on the amount of change per unit time in the temperature detected by the heat sensitive element 15 from the time when the heater 10 is energized and the time when the heater 10 is de-energized.
In addition to detecting the temperature gradient when the temperature rises and falls, the posture and movement of the iron main body are detected based on the ON / OFF signal from the detection sensor 14.

Then, the microcomputer 9 changes the control temperature according to the temperature gradient. That is, while the heater 10 is energized, the control temperature is changed to increase as the positive temperature gradient decreases, and when the energization to the heater 10 is stopped, the control is performed as the negative temperature gradient increases. Change to higher temperature. For example, "High steam"
In the case of, the temperature is changed within the range of 200 to 220 ° C. Therefore, when the temperature of the ironing surface suddenly drops and becomes lower than the initial control temperature by a predetermined temperature, such as when ironing with a damp cloth or steam, the heater 1
Since the positive temperature gradient during energization to 0 is extremely small and the negative temperature gradient during energization to the heater 10 is extremely large, the temperature of the ironing surface can be increased by raising the control temperature to near 220 ° C. Can be raised. On the other hand, when ironing a dry cloth without using steam, the positive temperature gradient during the energization of the heater 10 is relatively large, and the negative temperature gradient during the deenergization of the heater 10 is small. Since it is relatively small, the temperature is changed to a temperature near the initial control temperature.

Further, the microcomputer 9 further changes the control temperature changed as described above according to the movement of the iron body. That is, according to the signal from the detection sensor 14,
Until the number of ON / OFF signals per unit time exceeds the predetermined number, the control temperature is set to 1 as the number decreases.
The temperature is sequentially decreased with 0 ° C. as the upper limit, while as the number of times exceeds a predetermined number, the temperature is sequentially increased with 10 ° C. as the upper limit. Therefore, when the iron body moves slowly and there is a risk of overheating the clothes, the control temperature is lowered to prevent this, while when the iron body moves quickly and the clothes are not sufficiently heated, the control temperature is lowered. Raise it to prevent this. After all, in the case of "high steam", the control temperature is changed in the range of 190 to 230 ° C.

Further, when the microcomputer 9 detects that the iron body has not been operating for a certain period of time by the output of the detection sensor 14 after the base temperature once reaches the appropriate temperature, the switching relay 12 is opened to control the heater 10 with a control resistance. Although 11 is connected in series to reduce the heating amount of the base 23, the positive temperature gradient during heating is considerably large based on the output of the heat sensitive element 15, and the negative temperature gradient during heating is reduced. The switching relay 12 may be opened when it is considerably small.

Although the above embodiment has been described for the case where the temperature setting is "high / steam", it can be applied to the cases of "medium" and "low". The temperature is detected by the first thermosensitive element 1
Although only the case of using 5 has been described, the first heat sensitive element 15 and the second heat sensitive element 16 may be selectively used according to the purpose. For example, based on the output of the detection sensor 14, the output of the first thermosensitive element 15 may be taken in during the ironing operation, and the output of the second thermosensitive element 16 may be taken in during the rest.

[0019]

As described above, according to the first aspect of the invention, the set temperature of the base is changed to an appropriate temperature according to the temperature rise and fall of the base. Regardless of the stability of the base temperature, you can always iron in good condition.

Further, according to the second aspect of the invention, since the set temperature of the base is changed according to the operating state of the iron, the clothes can be appropriately heated regardless of the ironing speed, and the iron can always be kept in a good condition. Can be hung.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a circuit diagram in the embodiment.

FIG. 3 is a cross-sectional view of the iron body in the example.

[Explanation of symbols]

1 Temperature detection means 2 Temperature gradient detection means 3 Temperature setting means 4 State detection means 5 Setting temperature changing means 7 heating means

Claims (2)

[Claims] 1. A heating means for heating a base of an iron body, a temperature detecting means for detecting a temperature of the base, a temperature setting means for setting a temperature of the base, and a temperature set by the temperature setting means. In an iron provided with a control means for controlling the heating means on the basis of the temperature detected by the temperature detection means, a temperature gradient for obtaining a temperature gradient when the temperature of the base rises or falls based on the output of the temperature detection means. An iron comprising: a detecting means; and a set temperature changing means for changing the temperature set by the temperature setting means based on the output of the temperature gradient detecting means. 2. A heating means for heating the base of the iron body, a temperature detecting means for detecting the temperature of the base, a temperature setting means for setting the temperature of the base, and a temperature set by the temperature setting means. In an iron having a control means for controlling the heating means based on the temperature detected by the temperature detection means, a state detection means for detecting movement of the iron body, and the temperature setting based on an output of the state detection means An iron provided with a set temperature changing means for changing the temperature set by the means.