JPH04110000A - Device for controlling temperature of cordless iron - Google Patents

Abstract

PURPOSE:To obtain a cordless iron whose set temperature can be automatically varied by providing a set temperature varying means which can vary the set temperature according to information about operating conditions, such as a lowered value of the temperature of a base surface during the operating time of the iron. CONSTITUTION:A control portion 8 mounted on a control substrate 9 in a handle portion and comprised of microcomputers controls the drive of a heater 3 via a power control portion 10 in response to input signals from a temperature sensor 6, both switches 5,7 and according to a control plan programmed in advance, and also controls the drives of a ready lamp 11 and a stand-by lamp 12 both of which indicate that an iron is ready to be used, and that of a buzzor 13 which indicates that the temperature of a base surface is lowered to that for feeding electricity. As a result, in the case of materials for which a user frequently uses the iron even with a slightly low operating temperature, such as small articles and thin cloth, waiting time can be shortened by means of lowering of set temperature, while in the case of materials for which the user uses the iron for a long time, such as large articles and thick cloth, the set temperature is heightened so as to extend the time during which the iron can be used; a cordless iron whose temperature is controlled to an optimal value according to the condition in which the user uses it is thus obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature control device for a cordless iron that controls the temperature of a base surface.

[Conventional technology]

With conventional cordless irons, once the operating temperature is set using the temperature setting switch provided on the iron body, the heater is driven so that the temperature of the base surface reaches this set temperature when the body is placed on the stand. Control takes place.

For example, Figure 7 shows how the temperature of a conventional cordless iron is controlled. When the iron body is placed on a stand, electricity is started to flow to the heater located at the base of the iron body, causing initial heating. is performed, and when the temperature of the base surface reaches the set temperature (for example, 200 ° C.), heater control is performed to maintain the base surface temperature at the set temperature,
It goes into standby mode.

When the body is removed from the stand and ironing begins, the base surface temperature drops, but when the body is placed on the stand again, the heater reheats and the base surface is maintained at the set temperature again. .

If the base surface temperature drops to the power supply temperature (for example 150℃) while using the iron, a buzzer etc. will be activated to prompt the user to supply power, and if the base surface temperature reaches the set temperature, the ready lamp will be activated. It lights up to notify the user.

[Problem to be solved by the invention]

By the way, when ironing only small items and thin fabrics, the drop in the base surface temperature due to ironing is small and the usage time is short, but in this case, it is desirable to be able to use the iron frequently and with as short a waiting time as possible. , there is no need to always use the temperature at the upper limit of usable temperature.

On the other hand, when ironing a large, thick cloth, it is desirable to be able to use it continuously for as long as possible, although the temperature drop on the base surface due to ironing is large.

However, with conventional temperature control, if you set the -degree temperature, the base surface is always maintained at this set temperature regardless of the ironing usage status or the ironing load, so it is difficult to iron small items, thin fabrics, etc. If you want to use the iron frequently even at a slightly lower temperature, you will have to wait until the base surface reaches the set temperature, that is, until the usable lamp turns on. In this case, a significant temperature drop on the base surface causes the temperature to drop immediately to the power supply temperature, resulting in a short usable time.

The present invention has been made with these problems of the prior art in mind, and its purpose is to provide a cordless iron that can automatically change the temperature setting according to the usage conditions and ironing load. An object of the present invention is to provide a temperature control device.

[Means to solve the problem]

In order to achieve the above object, the temperature control device for a cordless iron of the present invention includes a temperature sensor that detects the temperature of the base surface of the iron body, and a detection switch that detects that the body is placed on a stand. and setting changing means for changing the set temperature in accordance with usage information such as the iron usage time from non-detection to detection of the switch and the temperature drop value of the base surface during this usage time.

In addition, in order to achieve the above purpose, a temperature sensor that detects the temperature of the base surface of the iron body, a detection switch that detects when the body is placed on a stand, and a temperature drop on the base surface during use of the iron are provided. It may also include a setting changing means for changing the set temperature according to the rate.

[For production]

For irons equipped with a setting change means that changes the set temperature according to usage information such as the iron usage time and temperature drop value of the base surface, the usage time is short and the temperature is low, such as when ironing small items or thin cloth. If the drop value is also small, the set temperature is set a little lower than the standard set temperature, or the
When the usage time is long, such as when ironing thick cloth, or when the temperature drop value is large, the set temperature is set slightly higher than the standard set temperature.

In addition, in devices equipped with a setting change means that changes the set temperature according to the rate of decrease in temperature of the base surface, the set temperature is changed according to the size of the ironing load, and the setting temperature is changed in the case of fabrics that require a large ironing load. The temperature is set high.

〔Example〕

Examples will be described with reference to FIGS. 1 to 6.

(First Example) First, a first example will be described using FIGS. 1 to 4.

Figure 2 shows the overall configuration of the cordless iron (11 is the iron body with the heater (3) embedded in the base part (2), and the body (11) is placed on the stand (4).
), the main body (1) is electrically connected to the stand (4) via a connector (not shown), and the main body (1)
) is supplied with power.

(5) is a temperature setting switch provided at the tip of the handle of the main body (1), (6) is a temperature sensor that detects the temperature of the base part (2), and (7) is a temperature setting switch provided on the tip of the handle of the main body (1). A usage state detection switch (8) that detects when placed on the handle and turns on is a microcomputer-configured control unit mounted on a control board (9) in the handle.

Figure 3 shows the block configuration of the cordless iron, and the control unit (8) executes a pre-programmed control procedure based on input signals from the temperature sensor (6) and both switches (5) and +71. Accordingly, the drive of the heater (3) is controlled via the power control unit 00), and the ready lamp (11) and standby lamp (12) are used to notify that the iron can be used, and also to notify that the base surface has fallen to the power supply temperature. Each buzzer (13) is driven and controlled.

FIG. 4 is a flowchart showing the control procedure of the control section (8). Next, the temperature control operation by the control section (8) will be explained with reference to FIG. 1, which shows the base surface temperature characteristics. explain.

When the main body (1) is placed on the stand (4) and the power is turned on, the control section (8) first turns on the temperature setting switch (5).
The set temperature value T stored in advance in the memory from the setting signal of
1 is called and set as the set temperature Tset, and after resetting the setting change flag F, that is, setting it to 0, power supply to the heater (3) is started via the power control unit αO). This results in the initial energized state shown in FIG.

When the base surface temperature T measured by the temperature sensor (6) reaches the set temperature Tset (TI) due to heating by the heater (3),
Having determined this, the control unit (8) stops power supply to the heater (3), turns on the ready lamp (11), and
Since the flag F is O, the standby lamp (12
), and at the same time, the standby counter t1 that measures the standby time starts counting.

As a result, the iron is in a standby state, and the user knows that the iron is ready for use by the lighting of both lamps (IIL (12)).

In this standby state, the detection switch (7) is turned on, so the control unit (8) detects the temperature sensor (6).
) The drive of the heater (3) is controlled so that the detected temperature T becomes the set temperature Tset.

Next, when you remove the main body (1) from the stand (4) and start ironing, the detection switch (7) turns off, so the ready lamp (11) and standby lamp (12)
) is turned off, the counting operation of the counter t1 is stopped, and at the same time, the counting operation of the in-use counter t2 for measuring the usage time is started, and this state is waited until the detection switch (7) is turned on again.

Then, when the user interrupts ironing and returns the main body (1) to the stand (4), the detection switch (7) is turned on, and the control unit (8) stops the counting operation of the counter t2 and , the base surface temperature T2 at this time is read from the temperature sensor (6), and the usage time t during use of the iron is determined.
2. The usage status of ironing is determined using the temperature drop value (TI Tz) of the base surface, and the set temperature Tset is changed according to the following conditions.

■ If 0≦(T, -T2)520℃, set temperature Ts
Do not change et and leave Tsec=T+ ■ 20
℃< (T, -72) 540℃ and 0≦t2≦30s
In case of ec, set temperature Tset=T, 10℃ ■ 40℃<(TI T2) or 30sec<t2
In the case of , the set temperature Tset = T, + 10℃.In other words, in the case of ■, the usage time t2 is short and the temperature drop value (TI Tz) is also relatively small, so the usage condition is ironing small items and thin fabrics. It can be determined that there is, and the set temperature Tset is changed to a slightly lower value.

In addition, in the case of ■, because the usage time t2 is long or the temperature drop value (T, -T2) is large, it can be determined that the usage condition is ironing large items or thick materials, and the set temperature Ts
Change et to a slightly higher value.

In the case of ■, the temperature drop value (TI Tz) is very small and the time for reheating to the set temperature Tset is short, so the setting is not changed.

Further, the control unit (8) sets the flag F to 1 only when the set temperature Tset is changed, and then enters a reheating state, and sets the base surface temperature to the reset set temperature Tset.
The drive of the heater (3) is controlled so that.

Then, when the base surface temperature reaches the set temperature Tset,
It enters a standby state and thereafter enters a control state that maintains this temperature.

At this time, the ready lamp (11) lights up to notify the user that it is ready for use, but when the set temperature Tset is changed, the standby lamp (12) remains off because flag F is set. In this case,
The user confirms that the base surface temperature is different from the set temperature value T1 set with the temperature setting switch (5), and if the standby lamp (12) is also lit, the base surface temperature is set. It can be confirmed that the temperature value is T1.

As a result, when the time of use is short and the temperature drop is not so large, such as when ironing a thin cloth for accessory 8, the set temperature Tset is changed to the set value T.
, since it can be set slightly lower than that, the time it takes for the base surface temperature to reach the set temperature Tset when reheating is shortened.
Waiting time can be shortened.

Also, like when ironing a large piece of cloth,
If the usage time is long or if the temperature drop value is large, the set temperature Tset can be set slightly higher than the set value T1, making it possible to extend the usable time.

By the way, when the standby state S after the reheating is completed, the standby counter t1 starts counting and measures the time in the standby state, but if the standby state has been in the standby state for a certain period of time ta or more, the previous ironing is stopped. It can be determined that the next fabric is being set after a period of time, and the set temperature Tset is initially set to the temperature set value T by the temperature setting switch (5).

(Second Example) Next, a second example will be described using FIGS. 5 and 6. Note that the same symbols as above indicate the same or equivalent items.

Figure 6 shows the control section (8) provided on the iron body (1).
) is shown as a flowchart, and FIG. 5 shows the base surface temperature characteristics during temperature control operation according to this control procedure.

The difference from the first embodiment is that when using the iron, the base surface temperature is read from the temperature sensor (6) at specified time intervals and the temperature decrease rate Td is constantly calculated from this temperature change.
The obtained temperature decrease rate Td is compared with a preset standard decrease rate Tx, and when the temperature decrease rate Td becomes equal to or higher than the standard decrease rate Tx,
The point is that the set temperature Tset is changed to a temperature set value T2 that is slightly higher than the temperature set value T1 set by the temperature setting switch (5).

In other words, the rate of temperature decrease Td on the base surface varies depending on the type of cloth being ironed, that is, the ironing load.The rate of temperature decrease Td on the base surface differs depending on the type of cloth being ironed, that is, the rate of temperature decrease Td on the base surface is greater. The available time will be shortened, but by increasing the set temperature Tset when the rate of temperature decrease Td exceeds a certain level, the usable time corresponding to this temperature increase ΔT(T, -Tυ) will be increased. This is how it was done.

In addition, in this embodiment, as in the case of the first embodiment, when the standby state continues for a certain period of time (205 ec) or more, the set temperature Tset t is changed to the initial setting value T1, assuming that the ironing step is W=1. However, the measurement of this time T1 includes the heating time.

In addition, in the above embodiment, the temperature decrease rate Td is equal to the reference decrease rate T.
Although it is possible to select whether or not to change the set temperature Tset depending on whether or not the set temperature Tset is greater than The change temperature value of the set temperature Tset may be changed. [Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

According to the temperature control device according to claim (2), the set temperature is changed according to usage information such as the iron usage time and the temperature drop value of the base surface during this usage time.
If you want to use it frequently even if the operating temperature is a little low, such as when ironing small items or thin fabrics, you can reduce the waiting time by lowering the temperature setting, and when ironing large items or thick fabrics. If you want to use it for a long time like
It is possible to increase the set temperature to extend the usable time, and to achieve optimal temperature control that suits the usage situation of the user.

Further, according to the temperature control device according to claim (2), the set temperature is changed according to the rate of temperature decrease of the base surface during use of the iron. When ironing cloth with a high ironing rate, it is possible to increase the set temperature to extend the usable time, and to realize satisfactorily ironing.

[Brief explanation of drawings]

1 to 6 show an embodiment of a temperature control device for a cordless iron according to the present invention, FIGS. 1 to 4 show a first embodiment, and FIG. 1 is a characteristic diagram of base surface temperature,
Fig. 2 is a partially cutaway side view of the cordless iron, Fig. 3 is a block diagram of the control circuit, Fig. 4 is a flowchart for explaining the operation, Figs. 5 and 6 show the second embodiment, FIG. 5 is a characteristic diagram of the base surface temperature, FIG. 6 is a flowchart for explaining the operation, and FIG. 7 is a characteristic diagram of the base surface temperature showing a conventional example. (1) , - Iron body, (21 - Base part, f31
- Heater, f41 - Stand, (6) - Temperature sensor, (71 - Detection switch, (81 - Control unit. Agent: Patent attorney Fuji 1) Ryuta Department Figure 1 Figure 2 fr Time (minutes) Figure Figure 1 Figure time (minutes) Figure time (hole)

Claims (2)

[Claims] (1) A temperature control device for a cordless iron that controls power supply to a heater disposed at the base of the main body to maintain the base surface at a set temperature when the iron main body is placed on a stand, the base comprising: A temperature sensor that detects the temperature of the surface, a detection switch that detects that the main body is placed on the stand, the iron usage time from non-detection to detection of the switch, and the temperature of the base surface during the usage time. 1. A temperature control device for a cordless iron, comprising: setting changing means for changing the set temperature according to usage information such as a temperature drop value. (2) A temperature control device for a cordless iron that maintains the base surface at a set temperature by controlling power supply to a heater disposed at the base of the iron body when the iron body is placed on a stand, the base comprising: a temperature sensor that detects the temperature of the surface; a detection switch that detects that the main body is placed on the stand; and a setting that changes the set temperature according to the rate of temperature decrease of the base surface during use of the iron. A temperature control device for a cordless iron, characterized in that it is equipped with a changing means.