JPH05305199A - Electric iron - Google Patents

Abstract

PURPOSE:To provide an electric iron which automatically corrects a preset temperature for the base of on-off control in accordance with a using condition to always retain an appropriate temperature at the base surface. CONSTITUTION:This electric iron is provided with a heater 2 for the base 1, a thermal detector 3 for the base temperature, an on-off controller 5 of the current to the heater 2 by comparison of the output of this thermal detector 3 with a preset temperature from the outside input, a temp. gradient detector 6 to check the lowering rate of temp. from the output of the thermal detector 3, a corrected figure calculator 9 to obtain a corrected figure of the preset temp. based on the temp. gradient, and a correction means 8 of the preset value to adjust the control temp. for the on-off controller 5 by use of the corrected figure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron capable of detecting a use state of an iron and automatically setting a temperature of a base surface according to the use state to control a temperature suitable for the use state. ..

[0002]

2. Description of the Related Art In a conventional iron, as shown in FIG. 6, a base surface temperature of 1 is set at a set temperature of 15 set by a user.
When 3 becomes higher, the heater power 12 is turned off, and when the base surface temperature 13 becomes lower, the heater power 12 is turned on and the average temperature 14 of the base surface temperature 13 is maintained near the set temperature 15.

[0003]

However, in the iron having the conventional structure, the actual base surface temperature 13 as shown in FIG.
Varies depending on how the iron is used. That is,
In the standby state A in which the iron is not operated, the temperature is rapidly increased by supplying the heater power 12 for a short time. On the contrary, the temperature drop is slow during the off time of the heater power. For this reason, the average temperature 14 of the base surface is higher than the set temperature 15 and is a biased temperature while the iron is not operating. Further, during ironing B, the average temperature 15 of the base surface is lower than the set temperature and is a biased temperature. This is because the amount of heat dissipated by the base increases because heat is taken away by the clothes being ironed, and the temperature rise of the base surface is slow even when the heater is turned on. Conversely, the temperature when the heater is turned off. This is because the decline will be faster. As described above, in the conventional iron, the average temperature 14 of the base surface fluctuates depending on the usage state of the iron.

In recent years, there has been an increasing demand for obtaining a good finished state for ironing, and the existence of such fluctuations in average temperature is a major problem.

The present invention is intended to solve the above-mentioned conventional problems, and a first object of the present invention is to provide an iron that always keeps the base surface temperature appropriately in accordance with the state of use of the iron. A second object is to provide an iron that holds the base surface temperature more appropriately.

[0006]

The first means for achieving the first object of the present invention is to provide a heater for heating a base, a temperature detecting means for detecting the temperature of the base, and an output of the temperature detecting means. An on / off control means for controlling on / off of energization of a heater by comparing with a set temperature set by an external input; a temperature gradient detection means for detecting a decreasing temperature gradient from an output of the temperature detection means; An iron having a correction value calculation means for calculating a correction value of a set temperature based on this temperature gradient and a setting correction means for correcting the control temperature of the on / off control means by the correction value.

The second means of the present invention for achieving the second object is that in addition to the configuration of the first means of the present invention, the correction value calculating means is provided when the temperature gradient reaches a certain value or more. This is an iron that immediately outputs a signal to the setting correction means.

[0008]

The first means of the present invention utilizes the fact that the temperature gradient shows a value according to the usage state of the iron while the heater is de-energized, and the iron is used based on this temperature gradient. It serves to judge the state and appropriately correct the set temperature.

The second means of the present invention, in addition to the operation of the first means of the present invention, makes a correction operation immediately when the temperature gradient exceeds a certain value while the heater is de-energized. In this way, it acts to prevent the temperature from being lowered during use.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the first embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 is a base of an iron for ironing clothes, 2 is a heater for heating the base 1, 3 is temperature detecting means for detecting the temperature of the base 1, and 4 is setting input means for the user to set and input the base temperature. .. Reference numeral 5 is an on / off control means for controlling the temperature of the base 1, comparing the set temperature 10 set by the setting input means 4 with the base surface temperature 11 detected by the temperature detection means 3,
If the base surface temperature 11 is lower than the set temperature 10, the heater 2
When the base surface temperature 11 is higher than the set temperature 10, the heater 2 is turned off. 6 is a temperature gradient detecting means for detecting the gradient of the temperature decrease from the output of the temperature detecting means 3 while the on / off controlling means 5 is turning off the output of the heater 2, and 8 is a control temperature of the on / off controlling means 5. Is a correction value calculation means for calculating an optimum correction value from the temperature gradient of the temperature gradient detection means 6, and the setting correction means 8 is on / off controlled from the correction value of the correction value calculation means 9. The control temperature of the means 5 is corrected.

The operation of this embodiment will be described below. The on / off control means 5 compares the set temperature 10 set by the user in the setting input means 4 with the base surface temperature 11 detected by the temperature detection means 3, and sets the temperature of the heater 2 as a boundary. Power is on / off controlled. At this time, the base surface temperature 11 is higher than the set temperature when the ironing is on standby as shown in FIG. 6, and when the user is ironing, the ironing is performed. The temperature is lower than the set temperature because it is cooled by the clothing. In this case, naturally, the difference between the average temperature of the base 1 and the set temperature 10 during ironing is related to the weight / lightness of the load. The present inventors have found that the load / heavy load causes the temperature of the base 1 to decrease while the on / off control means 5 is outputting off, that is, during the period in which the temperature of the base 1 decreases while the heater 2 is not energized. It has been obtained from the experimental results shown in FIG. 2 that it is related to the amount of decrease in a certain period of time, in other words, the temperature gradient. 2 (a) shows a case where the load is light, FIG.
Shows the case where the load is medium, and FIG. 3C shows the case where the load is heavy. That is, as shown in FIG. 3, the temperature gradient of the decreasing base surface temperature in a certain period of time is proportional to the lightness / heaviness of the load. That is, the heavier the load, the larger the temperature gradient value. The temperature gradient detecting means 6 reads the temperature gradient value at intervals of 5 seconds in this embodiment. The correction value calculation means 9 is the temperature gradient detection means 6
The setting value of the setting input means 4 is corrected by receiving the information of. As shown in FIG. 4, for example, if the load of the base 1 is small and the temperature gradient is 1, the correction value is set to 0, and if the load of the base 1 is large and the temperature gradient is 5, the correction value is set to 20. , The relation between them is set by the linear function. The setting correction means 8 receives the output of the correction value calculation means 9 and corrects the control temperature of the on / off control means 5.

Thus, for example, the average temperature of the base surface is higher than the set temperature while waiting for ironing, but the control temperature of the on / off control means 5 is corrected to be low according to the state of the load. Therefore, the average temperature of the base 1 is on / off controlled at a temperature close to the set temperature. Also, while ironing, the average temperature of the base 1 is lower than the set temperature, but if the load becomes heavy,
The control temperature of the on / off control means 5 is corrected to be high. Therefore, the average temperature of the base 1 is on / off controlled at a temperature close to the set temperature.

As described above, according to the present embodiment, the temperature gradient detecting means 6 detects the temperature gradient of the base 1 which is decreasing to determine whether the load is heavy or light, and the ON / OFF control means 5 is operated accordingly. The control temperature is automatically corrected. Therefore, the present embodiment realizes an iron capable of always performing good ironing work.

Next, an embodiment of the second means of the present invention will be described with reference to FIG. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description thereof will be omitted. The correction value calculating means 7 is the temperature detecting means 3
Upon receiving information from the setting input means 4, the on / off detection means 5, and the temperature gradient detection means 6, the on / off control means 5
The control temperature is corrected.

The operation of this embodiment will be described below. Similar to the above-described embodiment, the temperature gradient detecting means 6 determines the amount by which the temperature of the base 1 is reduced within a certain time during the period in which the temperature of the base 1 is reduced while the heater 2 is not energized, in other words, the temperature gradient. It is detecting. This temperature gradient is proportional to the magnitude of the load on the base 1. When the load is small, the temperature gradient is small, and when the load is large, the temperature gradient is large. The correction value calculation means 7 has the temperature gradient information of the temperature gradient detection means 6 and
In response to the detected temperature information of the temperature detecting means 3, when the temperature gradient value reaches 3 or more in this embodiment, the heater 2 is immediately released.
It acts to turn on the power of the. That is, the correction value is calculated from the difference between the temperature detected by the temperature detection means 3 and the set temperature of the setting input means 4. For example, if the set temperature is 190 degrees,
If the current temperature is 195 degrees, the correction value is set to 5 from 195-190 = 5. The setting correction means 8 corrects the control temperature of the on / off control means 5 from the correction value. As a result, you can instantly react to sudden temperature drops on the base surface due to ironing a damp cloth or using steam.
The energization of the heater 2 can be immediately started.

As described above, according to this embodiment, the temperature gradient detection means 6, the setting correction means 8, the setting input means 4 and the on / off control means 5 are provided, and the setting correction means 8 is based on the temperature gradient. By immediately determining the set correction value for turning on the power supply to the heater 2 and controlling the on / off power supply to the heater 2 based on the result, it is possible to prevent the base surface temperature from rapidly decreasing. Therefore, an iron that always supports good ironing work is realized.

[0017]

As described above, the first means of the present invention is the heater for heating the base, the temperature detecting means for detecting the temperature of the base, and the setting set by the output of the temperature detecting means and the external input. Turns on the heater by comparing with the temperature.
An on / off control means for controlling off, a temperature gradient detecting means for detecting a decreasing temperature gradient from an output of the temperature detecting means, and a correction value computing means for computing a correction value of a set temperature based on the temperature gradient As an iron having setting correction means for correcting the control temperature of the on / off control means by this correction value, the setting of the control temperature of the base surface can be appropriately changed according to the usage state of the iron, and the ironing is always good. You can work.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the correction value calculation means outputs a signal to the setting correction means immediately when the temperature gradient reaches a certain value or more. As an iron to be used, it is possible to immediately react to a sudden temperature decrease of the base surface caused by ironing a damp cloth or using steam, and always perform good ironing work.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an iron in an embodiment of a first means of the present invention.

FIG. 2 is a diagram showing an experimental example showing the relationship between the weight of the same load and the temperature gradient of the base.

FIG. 3 is a diagram showing the relationship between the weight of the same load and the temperature gradient of the base.

FIG. 4 is a characteristic diagram of a correction value included in the correction value calculation means.

FIG. 5 is a structural diagram of an iron in an embodiment of the second means of the present invention.

FIG. 6 is a diagram showing a temperature change of a base surface according to a usage state of a conventional iron.

[Explanation of symbols]

 1 Base 2 Heater 3 Temperature Detection Means 5 ON / OFF Control Means 6 Temperature Gradient Detection Means 7 Correction Value Calculation Means 8 Setting Correction Means 9 Correction Value Calculation Means

Claims (2)

[Claims] 1. A heater for heating a base, a temperature detecting means for detecting a temperature of the base, and an output of the temperature detecting means and a set temperature set by an external input are compared to turn on / off the energization of the heater. ON / OFF control means for controlling,
A temperature gradient detecting means for detecting the temperature gradient during the decrease from the output of the temperature detecting means, a correction value computing means for computing a correction value of the set temperature based on this temperature gradient, and an on / off control means by the correction value. An iron having a setting correction means for correcting the control temperature of the iron. 2. The iron according to claim 1, wherein the correction value calculation means outputs a signal to the setting correction means immediately when the temperature gradient reaches a certain value or more.