JPH04224798A - Iron - Google Patents

Abstract

PURPOSE:To allow ironing at a desired temperature regardless of the amount of moisture in the clothes, or the use or non-use of steam. CONSTITUTION:A control means is given a constitution in which a temperature lowering rate of a soleplate is determined and the soleplate temp. is automatically controlled according to the determined result.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ironing device that changes base control temperature in response to a decrease in base temperature.

0002

2. Description of the Related Art Conventional irons have a structure in which, when a desired temperature is set, the energization of a heater is controlled so that the temperature of the base becomes a constant base control temperature (for example, JP-A-58 -112588). However, when the clothes are damp or when ironing with steam, the base temperature drops rapidly, making it impossible to iron at the desired temperature. This problem is especially noticeable when using a cordless type.

0003

[Problems to be Solved by the Invention] The present invention solves the above problems and provides an ironing device that can iron clothes at a desired temperature regardless of how damp the clothes are or whether or not steam is used. .

0004

[Means for Solving the Problems] The ironing device of the present invention includes a heating means for heating a base of an iron body, a temperature detection means for detecting the temperature of the base, a set base control temperature and the temperature detection means. control means for controlling the heating means based on the temperature detected by the temperature detection means, the control means determines the rate of temperature decrease of the base based on the output of the temperature detection means, and controls the base according to the determination result. The structure is such that the temperature can be changed.

Further, the control means is configured to return the base control temperature to a predetermined temperature when it is detected that the iron main body has been placed in the rest position for a predetermined time.

[0006]

[Function] Since the present invention is constructed as described above, when the base temperature decreases slowly, such as when ironing dry clothes, the control temperature of the base is maintained at the setting state, If the base temperature drops suddenly, such as when ironing damp clothes or ironing using steam, take this drop in temperature into consideration and reset the base control temperature to a higher value than when it was set. , it is possible to maintain the desired temperature even if the temperature of the base decreases.

[0007] Furthermore, if the base is left in a resting state, the temperature returns to the set control temperature after a predetermined period of time, so overheating of the base can be prevented.

[0008]

[Example] In the figure, (1) is a mounting table on which the iron body (2) is placed, and when the iron body (2) is placed in a predetermined position, the open/close switch (3) (3) closes and the power supply terminal (4)(
Commercial power is applied to 4). The iron body (2) has power receiving terminals (5) (5) connected to the power supply terminals (4) (4).
), and commercial power is supplied to the base heating heater (7) via the relay (6). Power receiving terminal (
5) A DC power supply circuit (8) is connected to (5) to supply a predetermined DC voltage to each part, and a backup capacitor (9) is connected via this circuit (8).
) is charged. This capacitor (9) has a capacity to supply power for a predetermined period of time in place of the DC power supply circuit (8) while the iron body (2) is away from the mounting table (1).

[0009] (10) is a one-chip type microcomputer constituting a control means for controlling various operations, and operates according to a predetermined program. (11) is a temperature setting switch on the base, (12) is a detection switch that detects the state of the inverted bimetal which will be described later, (13) is a liquid crystal display that displays the set temperature and temperature level, (14) is a buzzer, (15)
) is a thermistor constituting the base temperature detection means. (16) is a rest detection means for detecting whether or not the iron body (2) is in the rest position placed on the mounting table (1) based on the output of the DC power supply circuit (8).

Next, the structure of the iron main body (2) will be explained with reference to FIG. 2. (17) is a base in which a heater (7) is embedded, steam generation chambers (18), (19), and a spout hole (20). have. (21) is a steam generation chamber (
18) A vacant room (22) facing the upstream side of the water between (19)
An inverted bimetal placed inside the base (17) is inverted upward when the temperature rises to a temperature that allows steam generation, and returns to its original state when the temperature drops below a predetermined temperature. (23) is a handle body fixed to the base cover (24);
), and has a grip part (26) whose upper surface is covered with a handle part (26), and whose rear part is covered with a rear cover (27). Grip (
A printed circuit board (28) on which electronic components constituting the circuit described above are mounted is disposed inside the circuit board (26). (29) is a setting button to press the temperature setting switch (11), (3
0) is a support base for attaching the liquid crystal display (13) to the printed circuit board (28), and (31) is a transparent window member that covers the upper surface of the liquid crystal display (13).

[0011] (32) is a water tank having a nozzle (33) at the bottom, and a built-in opening/closing body (34) for normally closing this nozzle. For the nozzle (33), the iron body (2) is placed on the mounting base (1).
When placed in the water tank (32) and powered on, the water tank (32) is positioned above the highest water level in the water tank (32) and the generation of steam is stopped. (35) is the steam/dry switching button that opens and closes the nozzle (33), and (36) is the inverted bimetal (2) when this button (35) is operated.
This is a steam control mechanism that selectively holds the opening/closing body (34) in the open and closed positions of the nozzle (33) depending on the state of (1). (37) is a communication member that connects the inverted bimetal (21) and the detection switch (12).

Next, to explain the operation, place the iron body (2) on the stand (1) and press the setting button (29).
) to select the temperature settings of "High/Steam", "Medium", and "Low". If you set it to "High/Steam" here, the microcomputer (10) will memorize the setting using an internal flag, light up the position indicating "High/Steam" on the display (13), and set it to "High/Steam". The corresponding base control temperature (200°C) is initially set in the internal temperature storage unit. Then, the relay (6) is controlled and the heater (7) is energized so that the base temperature detected by the thermistor (15) becomes the control temperature. When the temperature of the base (17) rises to a temperature at which steam can be generated, the inverted bimetal (
21) is reversed, the detection switch (12) is closed, and the steam control mechanism (36) is activated. Further, the temperature of the base (17) is displayed in five levels using five level display patterns on the display (13), and when the control temperature is reached, all five patterns light up to indicate that the appropriate temperature has been reached.

[0013] This display informs you of the appropriate temperature, and then when you remove the iron body (2) to start ironing,
Power to the heater (7) is cut off, but the capacitor (9)
) supplies power to each part, and the microcontroller (10
) continues to control. The microcomputer (10) detects that the iron body (2) has been detached from the output from the pause detection means (16).

[0014] Here, the base for ironing (17)
The temperature change will be explained with reference to FIG. First, do not operate the steam/dry switch button (35).
When ironing dry clothes in the "dry" setting, the temperature of the base (17) decreases slowly and changes as shown in (■) in the figure. Also, when ironing damp clothes using the same "Dry" setting, use the base (17)
The temperature drop is a little steeper than when the clothes are dry, and changes as shown in ■ in the same figure. On the other hand, if you operate the steam/dry switch button (35) to supply water from the tank (32) to the steam generation chambers (18) (19) and iron in the "steam" setting to generate steam,
The temperature of the base (17) decreases quite rapidly and changes as shown in the figure (■). Then, the unit time during ironing (△
As mentioned above, the amount of temperature decrease per t) varies depending on the dampness of the clothes and whether or not steam is used, such as T1, T2, and T3. Conventionally, once the control temperature of the base has been set, it has been maintained constant despite such temperature drops, so that the temperature during ironing may be lower than the desired temperature.

Therefore, when the iron body (2) is lifted from the resting state and removed, the microcomputer (10) sequentially measures the amount of temperature decrease per unit time (5 seconds) based on the output of the thermistor (15), and determines the amount of decrease. It is preset that as the temperature increases, the control temperature stored in the temperature storage section is changed to a higher temperature side. The variable range of the control temperature is set in advance, and in the case of "High/Steam", it is 200 to 2
It is in the range of 20°C. Therefore, if the rate of temperature decrease of the base (17) is small during the first ironing,
The control temperature may be kept the same as the initial setting or may be changed to a slightly higher temperature. In addition, if the rate of decline is large, the temperature is set at or near the maximum temperature of the variable range in consideration of this, and when the iron body (2) is reheated, the base temperature is heated to around 220℃, and the next ironing is done. Sometimes, even if the base temperature drops significantly, the initial control temperature (
The temperature can be maintained at close to 200℃. This control is continued even during the second and subsequent ironing operations.

[0016] Even if the control temperature is changed from the initial setting temperature, all the patterns indicating the temperature level on the display (13) will light up when the base temperature exceeds the initial setting temperature (200°C), indicating that the temperature is at an appropriate temperature. is displayed. Also, when the iron body (2) is placed on the mounting table (1),
The microcomputer (10) detects this based on the output from the pause detection means (16) and starts an internal timer that measures the pause time. When the rest time reaches a predetermined time, if the control temperature in the temperature storage unit has been changed, it is reset to the initial setting temperature, and after a further predetermined time, the temperature setting is turned off and the heater (7) is turned off. Cut off the electricity.

Although the above embodiment has been described for the case where the temperature setting is "high/steam", it can also be applied to cases where the temperature setting is "medium" or "low". In addition, in the iron with a cord, the ironing state (horizontal state) and resting state (freestanding state) are detected by a sensor that detects the posture of the iron body instead of the rest detection means (16), and the ironing state (horizontal state) and resting state (freestanding state) are detected. The control temperature of the base may be changed in the same manner as described above depending on the rate of temperature decrease.

[0018]

[Effects of the Invention] As described above, according to the present invention, the control temperature of the base is changed depending on the temperature drop of the base, so the temperature of the base can be stabilized regardless of the condition of the clothes or whether or not steam is being used. , always in good condition and can be ironed. Moreover, since the changed control temperature returns to the original value after a predetermined period of rest, it is possible to prevent the base from overheating.

[Brief explanation of the drawing]

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

FIG. 2 is a sectional view of the iron main body in the same embodiment.

FIG. 3 is a temperature change characteristic diagram in the same example.

[Explanation of symbols]

2　Iron body 7 Heater 10　Microcomputer 15 Thermistor

Claims (2)

[Claims] 1. A heating means for heating a base of an iron body; a temperature detection means for detecting the temperature of the base;
A control means for controlling the heating means based on a set base control temperature and a temperature detected by the temperature detection means, the control means controlling the rate of temperature decrease of the base based on the output of the temperature detection means. An ironing device characterized by making a determination and changing a base control temperature according to the determination result. 2. The ironing device according to claim 1, wherein the control means returns the base control temperature to a predetermined temperature when it is detected that the iron main body is placed in the rest position for a predetermined time. .