JP2701461B2 - Induction heating iron - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating iron used in ordinary households.

2. Description of the Related Art Recently, cordless irons have appeared on the market, but they can only supply power when the iron body is placed on an iron stand,
During the actual ironing operation, they relied on the heat storage. Therefore, if steaming was performed for a certain period of time, the temperature of the base surface of the iron body dropped, and it could not be said that it was a full-fledged cordless iron.

Therefore, various proposals have been made for induction heating type irons that can heat the iron body using induction heating even during the actual ironing operation. One example is shown in FIG. In FIG. 3, reference numeral 1 denotes an iron body which is induction-heated by the auxiliary heating coils 3 and 4 or the main heating coil 5.
The iron body 1 includes a thermistor for detecting the temperature of the iron base, a buzzer, and a control circuit therein, which are not particularly shown in the drawings. Temperature)
When it exceeds, the buzzer sounds and the user is notified. 2 is an ironing board, 3 and 4 are auxiliary heating coils A for inductively heating the iron body during the ironing operation.
And the auxiliary heating coils B and 5 are main heating coils for induction heating of the iron body during the ironing operation, 6 is an inverter for supplying high-frequency current to the auxiliary heating coils 3 and 4 or the main heating coil 5, and 7 is an ironing operation. 8 is a ceramic plate on which the iron body is placed during ironing work. 9 is a 100V AC power supply for general household use. .

The operation of the conventional induction heating type iron will be described below with reference to FIG. First, the user places the iron body 1 on the ceramic plate 8. At this time, the inverter 6 detects that the iron body 1 is on the main heating coil 5 and supplies a high-frequency current to the main heating coil 5. Thereby, the main heating coil 5 is excited, and the iron body 1 is induction-heated. When the temperature reaches a temperature at which the iron body 1 can be ironed, a notification sound is emitted from the iron body 1. From this, the user holds the iron body 1 and performs ironing on the felt 7. While the user is ironing, the iron main body 1 is connected to the auxiliary heating coil A3 or the auxiliary heating coil B4.
When the inverter 6 is located in the vicinity of the upper part, the iron body 1 is appropriately heated by induction since the inverter 6 detects this and supplies a high-frequency current. During the ironing operation, when the clothes are to be sorted, the iron body 1 is attached to the ceramic plate 8.
Place on top of. Even during ironing work like this,
Since the iron body 1 is induction-heated by the auxiliary heating coil A3 or the auxiliary heating coil B4, the iron body does not cool down even when ironing work is performed for a long time.

Problems to be Solved by the Invention However, such a conventional technique has the following problems in terms of safety. In other words, metal buttons
When clothes having a fastener or the like are ironed, if they are in the vicinity of the iron body 1, the iron body is heated and at the same time, these metal parts are also heated to a high temperature. For this reason, there is a risk that the user may burn when touching the metal button in an attempt to separate the clothes. According to measurements by the inventors, the temperature rise of these metal parts may be as steep as about 1.4 deg / sec, and it can be said that the possibility of a user being burned is extremely high.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide an induction heating iron that does not unnecessarily induction heat a metal part attached to clothing.

Means for Solving the Problems To achieve the above object, the present invention comprises an ironing body and an ironing board, wherein the ironing board is disposed below the ironing surface and the ironing surface, and guides the ironing body during the ironing operation. At least one auxiliary heating coil to be heated, a mounting portion on which the iron body is placed between ironing operations, a main heating coil provided below the mounting portion, and a high-frequency current supplied to the auxiliary heating coil and the main heating coil. And an auxiliary heating coil excitation inhibition input means for sending an auxiliary heating coil inhibition signal or an auxiliary heating coil permission signal to the inverter. The inverter outputs an auxiliary heating coil inhibition signal from the auxiliary heating coil excitation inhibition input means. Is received, the supply of the high-frequency current to the auxiliary heating coil is prohibited.

Operation The auxiliary heating coil excitation prohibition input means that sends a signal to prohibit the excitation of the auxiliary heating coil to the inverter is provided, and if the user operates this auxiliary heating coil excitation prohibition input means to perform ironing work. No induction heating is performed on the metal buttons or the like on the clothes, and there is no risk of burns. In addition, the auxiliary heating coil excitation prohibition input means can be turned on and off as required, so that a safe and convenient induction heating type iron can be used.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In FIG. 1, reference numeral 10 denotes an ironing surface for actually ironing, and two auxiliary heating coils (see FIGS. 3, 3 and 4) are provided below the ironing surface. 11 is an iron body, 12 is an ironing board, and 13 is a placing portion for placing the iron body 11 between ironing operations, which is made of a ceramic plate, and below which a main heating coil (FIG.
Reference). Reference numeral 14 denotes a set temperature changeover switch for setting a base temperature of the iron body 11, and reference numeral 15 denotes a temperature display LED indicating a current temperature of the iron base and a set temperature set by a user. Reference numeral 16 denotes an auxiliary heating coil excitation prohibition input means, which is a push switch. When this switch is pressed once, the excitation of the two auxiliary heating coils provided below the ironing surface 10 is prohibited. Excitation of the auxiliary heating coil is permitted. FIG. 2 is a block diagram showing an embodiment of the induction heating type iron of the present invention. In FIG. 2, 11 is an iron body, 14 is a set temperature changeover switch, using a push switch,
Normally, the output is LOW, but when pressed, it becomes HIGH. Fifteen
Is a temperature display LED, which consists of four LEDs, each corresponding to cut, 120 degrees, 160 degrees, and 200 degrees. 16
Is the above-mentioned auxiliary heating coil excitation prohibition input means.
The LOW signal is output, but when pressed once, it is locked to the HIGH signal, and when pressed again, the lock is released and the signal becomes the original LOW signal. Reference numeral 17 denotes a base temperature detecting means for detecting the temperature of the base surface of the iron body 11, and uses a thermistor. Reference numeral 18 denotes a transmitting unit that receives the temperature information from the base temperature detecting unit 17, converts it into a signal, puts it on a carrier wave of 300 MHz, and sends it to the ironing board side. 19 is transmission means
This is a receiving unit that receives a radio signal from the controller 18 and sends temperature information to the inverter 20. Reference numeral 20 denotes an inverter that supplies a high-frequency current to the auxiliary heating coil A22, the auxiliary heating coil B23, or the main heating coil 24, and performs the following operation.
First, the set temperature set by the set temperature changeover switch 14 is compared with the temperature information from the receiving means 14 (that is, the base temperature of the iron body 11), and the temperature information from the receiving means 14 is lower than the set temperature. When searching for a heating coil on which the iron body 11 is mounted, a high-frequency current is supplied to the heating coil to induction-heat the iron body 11, and conversely, the temperature information from the receiving means 14 indicates the set temperature. If it is higher than the above, the apparatus is set in a standby state and the induction heating is not performed. Second, when a HIGH signal is received from the set temperature changeover switch 14, the set temperature is changed up by one step. Thirdly, the temperature information from the receiving means 14 is displayed on the temperature display LED 15 in a blinking mode, and the set temperature is displayed in a lighting mode. Fourth, when a HIGH signal is received from the auxiliary heating coil excitation prohibition input unit 16, if the temperature information from the receiving unit 14 is lower than the set temperature, the search described in the first operation is performed by the main heating. This is performed only for the coil 23. In other words, supply of the high-frequency current to the auxiliary heating coil A21 or the auxiliary heating coil B22 is prohibited. Fifth,
LED 15 for temperature display by setting temperature switch 14
Is set to the [OFF] position, all the heating coils are not heated regardless of the temperature information from the iron body 11.

Hereinafter, the operation of the induction heating type iron of the present embodiment will be described. First, normal ironing will be described. First, the user puts the iron body 11 on the mounting portion 13. Next, press the set temperature switch to set the desired base temperature. At this time, since the iron body 11 is at room temperature, the temperature information of the iron base transmitted by the transmitting means 11 is lower than the set temperature. The inverter 20 detects a heating coil on which the iron body 11 is mounted (in this case, the main heating coil 23), and supplies a high-frequency current to the heating coil. The main heating coil 23 to which the high-frequency current has been supplied is excited to inductively heat the iron body 11. As a result of the induction heating of the iron body 11, its base temperature rises and soon reaches the set temperature. At this time, since the temperature information sent from the iron body is equal to or higher than the set temperature, the inverter 20 stops heating the iron body 11. The user sees the display of the temperature display LED, knows that the base temperature of the iron body 11 has reached an appropriate temperature, and starts ironing. When the base temperature of the iron body 11 is lowered by ironing, the base temperature detecting means 17 detects this and the transmitting means 18 transmits this signal. The receiving means 19 receives this signal, and the inverter 20 detects the signal to detect the position of the heating coil on which the iron body 11 is mounted.
When the iron main body 11 is located near the auxiliary heating coil A21, the inverter 20 supplies a high-frequency current to the auxiliary heating coil A21. Further, when it is located near the auxiliary heating coil B22, a high-frequency current is supplied to the auxiliary heating coil B22. Thus, even during the ironing operation, the base temperature of the iron main body 11 is kept substantially at the set temperature. When the ironing operation is completed, the user operates the set temperature switch 14 to set the temperature display LED to the [OFF] position. In this way, heating of all the heating coils is stopped regardless of the position of the iron main body 11, and the base temperature of the iron main body 11 falls to room temperature.

Next, a case of ironing clothes having parts that may be heated by induction such as metal buttons and fasteners will be described. In this case, the user presses the auxiliary heating coil inhibition switch 16 before ironing. Thereby, the inverter 20 limits the supply destination of the induction heating current to only the main heating coil 23 when the temperature information received by the receiving means 19 is lower than the set temperature, in other words, when heating is necessary. . In other words, while the user is performing the ironing operation on the ironing surface 10, the auxiliary heating coil A21
Alternatively, the high frequency current is not supplied from the inverter 20 to the auxiliary heating coil B22. That is, the metal parts are not heated during the ironing operation. As a result, it is conceivable that the base temperature of the iron body 11 decreases, but an operation of separating clothes is required between ironing operations. At this time, the iron body 11 is placed on the ceramic plate 13. In this state, the iron body 11 is induction-heated by the main heating coil 23, and the base temperature of the iron body 11 is restored. When the ironing operation is completed, the set temperature switch 14 is operated to set the temperature display LED to the [OFF] position. Thus, the base temperature of the iron body 11 drops to room temperature.

If the clothing to be ironed does not have a metal button, fastener, or the like, pressing the auxiliary heating coil prohibition switch 16 again switches to the normal ironing operation mode.

In this embodiment, the auxiliary heating coil excitation prohibition input means is provided on the ironing board side, but may be provided on the iron body side for improving operability. In this case, a signal prohibiting the operation of the auxiliary heating coil is added to the signal from the iron body.

Effect of the Invention As is clear from the above embodiments, the present invention
By providing a means for inhibiting the operation of the auxiliary heating coil, when ironing clothes having a metal button or the like, the metal is induction-heated, and it is possible to prevent a user from touching it and getting burned. An induction heating iron can be provided.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of an induction heating iron according to the present invention, FIG. 2 is a block diagram showing the electric circuit, and FIG. 3 is a block diagram showing a conventional induction heating iron. 11 ... iron body, 12 ... ironing board, 13 ... mounting part, 16 ... auxiliary heating coil excitation prohibition input means, 20 ... inverter, 21 ... auxiliary heating coil A, 22 ... auxiliary heating coil B.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideyuki Konan 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-54-82490 (JP, A) 48243 (JP, A) JP-A-53-117839 (JP, A) JP-A-61-140800 (JP, U)

Claims (1)

(57) [Claims] 1. An ironing machine comprising: an ironing body and an ironing board, wherein the ironing board is disposed below the ironing surface and has at least one auxiliary heating coil for inductively heating the ironing body during the ironing operation; And a main heating coil provided under the mounting part, an inverter for supplying high-frequency current to the auxiliary heating coil and the main heating coil, and an auxiliary heating coil prohibited for the inverter. An auxiliary heating coil excitation prohibition input means for transmitting a signal or an auxiliary heating coil permission signal, wherein the inverter prohibits the supply of high-frequency current to the auxiliary heating coil when receiving the auxiliary heating coil prohibition signal from the auxiliary heating coil excitation prohibition input means. Induction heating iron.