JPH02128800A - Induction heating type iron - Google Patents

Abstract

PURPOSE:To provide an induction heating type iron with high efficiency of power conversion, by providing a pick-up coil for generating induced electromotive force by a high frequency magnetic field, the pick-up coil being wound approximately close to and along the outer periphery of the bottom surface of an iron base on the approximately same plane. CONSTITUTION:A high frequency magnetic field is generated by high frequency current supplied from a high frequency power supply 16 to an exciting coil 14, and an iron base 2 of an iron body unit is induction heated to supply electric power necessary for ironing. The iron base 2 is constituted of iron of magnetic metal body and an pick-up coil 3 is coiled around the iron base 2 in intimate contact therewith. The high frequency magnetic field generated by an exciting coil 14 is concentrated in this iron base 2 of magnetic body, and the pick-up coil 3 having such intimate contact constitution can convert utilizably electromagnetic energy without any losses to provide efficiently induced electromotive force. Thus, a compact system with very high efficiency of power conversion can be constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pickup coil for supplying power to an electric circuit provided in an iron main unit of an induction heating iron.

BACKGROUND ART - Various induction heating irons have been proposed as one form of dress iron. The advantage of this induction heating iron is that it can supply power even during ironing operations, making it possible to realize a full-fledged cordless iron. However, in order to function as an overall system, it is necessary to transmit temperature information from the iron base to the control unit while being cordless, and thereby control the high-frequency magnetic field source to control the temperature. To achieve this purpose, temperature information transmission methods using wireless communication have been proposed. However, this requires some kind of electrical circuit in the cordless iron main unit, and it is necessary to secure a power source for this.

Generally speaking, it is possible to use primary batteries or secondary batteries as a power source for cordless devices, and it is considered the simplest and most practical method to use these batteries in the iron unit to achieve the above purpose. ing.

Problems to be Solved by the Invention However, in such a method, problems arise due to the use of batteries. That is, in the method using a primary battery, it is necessary to replace the battery when the electromotive force of the battery becomes insufficient, and in the method using a secondary battery, it is necessary to separately charge the battery by means such as a river. Although this improves usability by making the system cordless, it comes with the inconvenience of requiring battery-related maintenance, so it cannot be said that the system is of great benefit to the user.

The present invention has been made in consideration of the above-mentioned problems, and provides a truly user-friendly power supply configuration for equipment having a cordless form.Firstly, in addition to the above-mentioned purpose, the present invention has extremely high power conversion efficiency. Our goal is to provide a high quality induction heating iron. The second object is to provide an induction heating iron that can effectively convert power even when an iron base including an aluminum layer is used. The third objective is to provide an induction heating iron with good visibility when using the induction heating iron. Fourth, it is an object of the present invention to provide an induction heating iron that maintains the above-mentioned visibility and also has very high power conversion efficiency.

Means for Solving the Problems The present invention was invented to solve the above problems.
The first means is that, in an iron main unit of an induction heating iron, an iron base made of a magnetic metal body and an iron base provided on the iron main unit for use in transmitting temperature information of the iron main unit, etc. an electric circuit, and a pickup coil that obtains an induced electromotive force by a high-frequency magnetic field from an excitation coil to which a high-frequency current is supplied for induction heating to supply power to the electric circuit, and the pickup coil is connected to an iron base. The iron base is wound approximately on the same plane as the bottom surface of the iron base and approximately closely wound along the outer periphery of the iron base.

Regarding the iron base and pickup coil of the first means, a second means includes an iron base having a multilayer structure made of aluminum and a magnetic metal body, and an appropriate support means on the bottom surface of the iron base. It is configured as a pickup coil that is wound so as to extend outward from the outer periphery of the bottom surface of the base at an appropriate distance.

A third means, regarding the iron base and pickup coil of the first means, includes an iron base having a multilayer structure made of aluminum and a magnetic metal body, and an appropriate support means at an appropriate distance above the bottom surface of the iron base. It is configured as a pickup coil that is supported and wound by.

A fourth means is a pickup coil of the first means and the second means (regarding the second means, at the tip of the iron base, the pickup coil is located inside and above the bottom outer periphery of the iron base). It is structured so that it is wrapped around.

In the first means, the pick-up coil is wound approximately closely around the outer periphery of the iron base made of magnetic metal to efficiently obtain induced electromotive force through electromagnetic induction caused by magnetic flux penetrating the iron base.

In the second method, the power conversion efficiency is lower than in the first method because the pickup coil is spatially distanced from the iron base, but the aluminum part of the multilayered iron base The induced electromotive force is stably obtained without being affected by the output drop due to the electromagnetic shielding effect caused by the electromagnetic shielding effect.

In the third method, since the pickup coil is located above the bottom surface of the iron base, it is possible to prevent the influence of the electromagnetic shielding effect caused by the aluminum part of the multilayered iron base, as in the second method. ,
If you compare it with the second method, the power conversion efficiency will further decrease.However, for the user, the visibility around the bottom of the iron base is improved, making it easier to use.Also, the power conversion efficiency is low. However, by increasing the number of turns of the pickup coil, etc., it is possible to obtain an induced electromotive force at a level that poses no problem in actual use.

In the fourth method, the proportion of the pickup coil that contributes to power conversion is relatively low (and the proportion of the pickup coil that contributes to power conversion is
By placing only the tip of the iron base, which is an important part, inside and above the outer periphery of the bottom of the iron base, usability is improved while minimizing the reduction in power conversion efficiency.

EXAMPLE First, an example of the first means of the present invention will be described. FIGS. 1(a) and 1(b) show a top view and a side view, respectively, of an iron main body device of an induction heating iron using an embodiment of the first means. 2 is a handle, and 2 is an iron base made of iron, which is a magnetic metal. Reference numeral 3 designates a pickup coil that generates an induced electromotive force using a high-frequency magnetic field from an excitation coil for induction heating, which will be described later. Reference numerals 4 to 8 designate support means for fixing and supporting the pickup coil 3 on the handle l. FIG. 1(C) shows an enlarged sectional view of the pickup coil 3. 9 is a coil wire, and IO is a heat-resistant non-magnetic coated tube. In this embodiment, the coil wire 9 has an outer diameter of 0.5 mm and is wound in 19 turns. As shown in the figure, the pickup coil 3 is wound substantially closely around the outer periphery of the iron base 1 on substantially the same plane as the bottom surface of the iron base 1.

Next, a configuration for induction heating this iron main body device will be explained. FIG. 2 shows a sectional view of an ironing board device for induction heating the iron main body device shown in FIG. 1. 11 is an exterior case, 12 is a rigid supporting top plate, 13 is a flexible mat made of felt or the like, and 14 is spirally wound into a flat plate for induction heating of the iron main unit shown in FIG. 15 is a support means for supporting the excitation coil 14; 16 is a high-frequency power supply section that supplies high-frequency current to the excitation coil 14; 17 is an excitation coil 14;
This is a connection means for electrically connecting the high-frequency power source and the high-frequency power source.

A high frequency magnetic field is generated by the high frequency current supplied from the high frequency power supply section 16 to the excitation coil 14, and this causes the first
The iron base 2 of the iron main body device shown in the figure is heated by induction, and the power necessary for ironing is supplied. Further, the high frequency power supply section 16 controls the high frequency current supplied to the excitation coil 14 in accordance with iron base temperature information from an iron main body device, which will be described later.

Next, the function of the pickup coil 3 of the iron main unit shown in FIG. 1 will be explained. When this iron body device is placed on the ironing board device shown in FIG. 2, the iron base 2 is heated by induction by the aforementioned high-frequency magnetic field.

At this time, an induced electromotive force is generated in the pickup coil 3 due to the magnetic flux passing through the iron base 2. This induced electromotive force obtains power for the electric circuit provided in the iron main unit. The configuration of the electric circuit provided in the device is shown. 18 is the pickup coil 3
A rectifier diode that rectifies the high-frequency AC electromotive force obtained by 19 into DC, a smoothing capacitor 19 that smooths this,
Reference numeral 20 denotes a power supply circuit section which converts the DC voltage obtained by these into a voltage necessary for use in a circuit connected later. 21 is a thermistor provided on the iron base 2, and 22 is a temperature detection section that detects the temperature of the iron base 2 using the thermistor 21. 23 is a transmitting unit for encoding a signal corresponding to the temperature of the iron base 2 obtained by the temperature detecting unit 22 and transmitting it wirelessly to the ironing board device; 24 is a transmitting unit for transmitting the high frequency output of the transmitting unit 23 into the air; It's an antenna. Power is supplied to the temperature detection section 22 and the transmission section 23 from the power supply circuit section 20 . The ironing board device receives this wireless signal, and the ironing base 2 that is being transmitted by this
The high frequency current applied to the excitation coil 14 is controlled by recognizing the temperature of the excitation coil 14 and comparing it with the set temperature. In this way, the pickup coil 3 can supply power to the electric circuit provided in the iron main body device in a non-contact manner by using electromagnetic induction caused by the high frequency magnetic field for induction heating from the ironing board device.

In the first method, the iron base 2 is made of iron, which is a magnetic metal, and the pickup coil 3 is wound around the iron base 2 almost closely. Excitation coil 14
The high-frequency magnetic field generated by the iron base 2, which is a magnetic material, is concentrated on the iron base 2, and the pickup coil 3 has such a close contact configuration that all of the magnetic field is not lost (it is used to convert electromagnetic energy). The induced electromotive force can be obtained efficiently.Therefore, this embodiment has very good power conversion efficiency and can configure a compact system.

In this example, the iron base material is iron, but
Similar effects can be obtained with any magnetic metal such as magnetic SUSm.

Next, an embodiment of the second means will be described. FIGS. 4(a) and 4(b) show a top view and a side view, respectively, of an embodiment of an iron main body device of an induction heating iron using this second means. 25 is a handle part, 26 is a bottom surface with a thickness of 0.5 m
covered with 5mm magnetic 5USjllll, the other part is 5m thick
This is a two-layered iron base made of m aluminum. Using an iron base like this,
If the iron base is made of only magnetic metal such as iron or magnetic SUS steel as in the first method, the weight will be large and the temperature distribution on the bottom surface will be uneven due to low thermal conductivity. It is. In this embodiment, in order to avoid such inconveniences, a multilayer structure made of aluminum, which is lightweight and has high thermal conductivity, is used. 27 is a pickup coil, and 28 to 32 are pickup coils 27 connected to the handle part 2.
It is a support means for fixing to 5. The pickup coil 27 has a structure in which a coil wire is wound in the circumferential direction of the iron base 26, similar to that shown in FIG. 1(C). The difference from the first method is that the pickup coil 27 is installed by supporting means 28 to 32 on substantially the same plane as the bottom surface of the iron base 26 and with a gap of about 2 mm therebetween. The reason for this will be explained below.

As described above, in this embodiment, the iron base 26 has a multilayer structure of magnetic 5USj$1 and aral minilamb. The high-frequency magnetic field generated by the excitation coil 14 generates eddy currents in the internal magnetic SUS inertia layer of the iron base 26, thereby heating it. Further, the aluminum layer promotes heat conduction and makes the temperature distribution of the iron base 26 uniform. However, since this aluminum layer has an electromagnetic shielding effect, if the pickup coil 27 is provided closely around the iron base 26 as in the first method, this influence will cause the pickup coil 27 to:
Since the magnetic flux is absorbed, there arises the disadvantage that no induced electromotive force is generated. Therefore, in order to avoid this, the pickup coil 27 is installed with a gap of about 2 mm from the periphery of the iron base 26 by the supporting means 28 to 32. By adopting such a configuration, it is possible to obtain induced recording power from a high frequency magnetic field without being affected by the electromagnetic shielding effect of the aluminum layer.

Moreover, by using the iron base 26 having a multilayer structure made of aluminum, it is possible to perform heating with a uniform temperature distribution. Incidentally, the induced electromotive force obtained by this big-above coil 27 is used as a power source for an electric circuit for transmitting temperature information provided in the iron main body device, similarly to the first means. In addition, since the pickup coil 27 is located approximately on the same plane as the bottom surface of the iron base 26,
The distance to the excitation coil 14 is the same as that of the first means,
If the gap between the iron base 26 and the pickup coil 27 is within this range, the degree of electromagnetic coupling will be approximately equal, and an induced electromotive force can be obtained without significantly reducing power conversion efficiency.

In this embodiment, the iron base 26 has a two-layer structure, but the same effect can be obtained by using a multi-layer structure of three or more layers. Further, in this embodiment, a multilayer structure using magnetic 5USjIi is used, but the same effect can be achieved even if a multilayer structure with other magnetic metals is used.

Next, an embodiment of the third means will be described. FIGS. 5(a) and 5(b) respectively show a top view and a side view of an embodiment of the iron main body device of an induction heating iron using this third means. 33 is a handle part, 34 is a second This iron base has a multilayer structure of magnetic SUS steel and aluminum similar to that used in the second means.The reason for using this iron base is the same as the reason stated in the explanation of the second means.

35 is a pickup coil, and 36 to 40 are supporting means for fixing the pickup coil 35 to the handle portion 33. The pickup coil 35 has a structure in which a coil wire is wound in the circumferential direction of the iron base 34, similar to that shown in FIG. 1(c). This method differs from the second method in that the pickup coil 35 is located approximately 10 mm above the bottom surface of the iron base 34. In the second method shown in FIG. 4, the pick-up coil 27 is on almost the same plane as the bottom surface of the iron base 26 and protrudes slightly from the outer periphery of the iron base 26, making ironing somewhat inconvenient during ironing work. It had become. By adopting a configuration in which the pickup coil 35 is spaced above the iron base in this way, it is possible to prevent the influence of the electromagnetic shielding effect caused by the aluminum part of the multilayered iron base as in the second method, and also For the user, the ease of use can be improved by improving the visibility of the bottom periphery and sides of the iron base. Furthermore, compared to the second method, the distance between the pickup coil 35 and the excitation coil 14 is long, so the degree of electromagnetic coupling is low, and therefore the power conversion efficiency is slightly lowered. Therefore, the pickup coil 35
It is necessary to increase the number of turns of the method compared to the second method.

By taking such measures, it is possible to obtain an induced electromotive force at a level that poses no problem in actual use.

Incidentally, the induced electromotive force obtained by this pickup coil 35 is used as a power source for an electric circuit for transmitting temperature information provided in the iron main body device, similarly to the first and second means.

Finally, an embodiment of the fourth means of the present invention will be described. 6th
Figures (a) and (b) show a top view and a side view of an embodiment of an iron main body device of an induction heating iron using this fourth means. 41 is a handle portion, and 42 is an iron base having a multilayer structure of magnetic SUSm and aluminum similar to that used in the second means and the third means.

The reason for using this is the same as the reason stated in the explanation of the second means. 43 is the pickup coil, 44-4
8 is a support means for fixing the pickup coil 43 to the handle portion 41. The pickup coil 43 has a structure in which a coil wire is wound in the circumferential direction of the iron base 42, similar to that shown in FIG. 1(c). This differs from the second and third means in that the pickup coil 43 is installed only at the tip of the iron base 42 above and inside the bottom surface of the iron base by means of support means 44 and 48. . Overall, the tip of the iron base 42 has a relatively low contribution to power conversion (only this part is used as the excitation coil 1).
Even if the degree of electromagnetic coupling is reduced by installing the device at a distance from the device 4, there will be little effect overall. Further, the tip of the iron base 42 is an important part for the user's visibility during ironing work, and if the visibility of this part becomes good, the workability will be greatly improved. In this way, by providing only the tip of the iron base 42 inside and above the outer periphery of the bottom surface of the iron base 42, it is possible to configure an easy-to-use system while minimizing reduction in power conversion efficiency.

Note that the induced electromotive force obtained by this pickup coil 43 is used as a power source for an electric circuit for transmitting temperature information provided in the iron main body device, similarly to the first to third means. Further, in this embodiment, the iron base 42 has a multilayer structure made of magnetic metal and aluminum.
It goes without saying that the same effect of improved visibility can be obtained even if the first method is applied to a configuration using a pickup coil closely wound around an iron base made of only magnetic metal. .

Effects of the Invention As described above, according to the pickup coil described in the explanation of the first to fourth means of the present invention, electric power can be supplied to the electric circuit of the iron main unit of the induction heating iron in a non-contact manner. This eliminates the need for battery replacement, which is required when a negative battery is used, and there is no need for separate charging, which is required when a secondary battery is used.

Furthermore, according to the first means of the present invention, the pickup coil is wound approximately closely around the outer periphery of the iron base made of magnetic metal such as iron (thereby, all of the magnetic flux passing through the iron base can be wound by electromagnetic induction without loss). Efficiency (induced electromotive force can be obtained.

According to the second method, the power conversion efficiency decreases somewhat due to the spatial distance between the pickup coil and the iron base, but the electromagnetic force generated due to the aluminum part of the iron base with a multilayer structure is reduced. It is possible to stably obtain an induced electromotive force without being affected by a reduction in output due to the shielding effect, and it is also possible to heat the iron base with a uniform temperature distribution.

Also, according to the third method, since the pickup coil is located above the bottom surface of the iron base, it is prevented from being affected by the electromagnetic shielding effect of the aluminum part of the two-layered iron base, similar to the second method. However, compared to the second method, there was a possibility that the power conversion efficiency would further decrease. However, for the user, the visibility around the bottom of the iron base is improved, making it easier to use. Although the power conversion efficiency is low, by increasing the number of turns of the pickup coil, etc., it is possible to obtain an induced electromotive force at a level that poses no problem in actual use.

Furthermore, according to the fourth means, only the tip of the iron base, which has a relatively low proportion of the pickup coil that contributes to power conversion (and is an important part for user visibility), is removed from the bottom of the iron base. By providing it inside and above the outer periphery, it is possible to improve usability while minimizing the reduction in power conversion efficiency.

As described above, the present invention can achieve very large effects, and its industrial value is considered to be very high.

[Brief explanation of the drawing]

Fig. 1 is a top view and side view of an embodiment of the first means of the induction heating type iron of the present invention, and a sectional view of a pickup coil, Fig. 2 is a sectional view of the ironing board device, and Fig. 3 is the main body of the iron. A configuration diagram of the electric circuit of the device, FIG. 4 is a top view and a side view of an induction heating iron according to an embodiment of the second means, and FIG. 5 is a top view and a side view of an embodiment of the third means. 6 are a top view and a side view of an embodiment of the fourth means. 2... Iron base of the first means, 3... Pick-up coil of the first means, 4-8... Support means of the first means, 14... Excitation coil, 26... No. Iron base of the second means, 27...Pickup coil of the second means, 28-32...Supporting means of the second means,
34... Ironing base of third means, 35... Pick-up coil of third means, 36-40... Supporting means of third means, 42... Ironing base of fourth means, 43...Pickup coil of fourth means, 4
4 to 48... Supporting means of the fourth means. -Q4 e”1 ’7’o-8 sun (O ward) (”1 ← -) O Zeng skin to 廿法

Claims (4)

[Claims] (1) In the iron main unit of the induction heating iron,
An iron base made of a magnetic metal body, an electric circuit provided in the iron main unit for use in transmitting temperature information, etc. to the iron main unit, and an electric circuit for induction heating to supply power to this electric circuit. has a pickup coil that obtains an induced electromotive force by a high-frequency magnetic field from an excitation coil to which a high-frequency current is supplied, and the pickup coil is located substantially on the same plane as the bottom surface of the iron base and in close contact with it along the outer periphery of the iron base. An induction heating iron that is wrapped around the iron. (2) An iron base having a multilayer structure made of aluminum and magnetic metal, and an iron base that extends outward from the outer periphery of the bottom surface of the iron base at an appropriate distance on approximately the same plane as the bottom surface of the iron base using appropriate support means. 2. The induction heating iron according to claim 1, further comprising a pick-up coil wound with a pick-up coil. (3) Claim 1 comprising: an iron base having a multilayer structure made of aluminum and magnetic metal; and a pickup coil wound above the bottom surface of the iron base at an appropriate distance and supported by appropriate support means.
Induction heating iron as described. (4) The induction heating iron according to claim 1 or 2, wherein at the tip of the iron base, the pickup coil is wound inside and above the outer periphery of the bottom surface of the iron base.