JPH0970497A - Iron - Google Patents

Abstract

(57) [Abstract] [Purpose] In an iron that lowers the output voltage of the rectifier that rectifies the voltage of the commercial power source by the voltage drop unit and drives the relay control unit to control the energization of the heater unit, the voltage of the commercial power source Even if the voltage is higher than the rated voltage, heat generation in the voltage drop section or constant voltage section is suppressed so that the handle temperature does not change depending on the voltage. [Structure] The voltage of the commercial power source 1 is rectified by a rectifying unit 2, and the output voltage of the rectifying unit 2 is dropped by a voltage drop unit 16,
The relay control unit 4 is driven by the output voltage of the voltage drop unit 16, the voltage across the relay control unit 4 is made constant by the constant voltage unit 6, and the relay control unit 4 controls the energization of the heater unit 9. Control. The control unit 15 controls the voltage drop unit 16 according to the voltage of the commercial power supply 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron for lowering an output voltage of a rectifying section for rectifying a voltage of a commercial power source by a voltage drop section and driving a relay control section to control energization of a heater section. .

[0002]

2. Description of the Related Art Conventionally, this type of iron has generally been configured as shown in FIGS. The configuration will be described below.

As shown in the figure, the commercial power supply 1 supplies a voltage having a waveform as shown in FIG. The rectifying unit 2 is for unidirectionally flowing the current flowing through the circuit.
Thus, the voltage waveform of the commercial power supply becomes a waveform as shown in FIG. The voltage drop unit 3 is configured by connecting a plurality of resistors in series and drops the output voltage of the rectification unit 2 to relay the relay control unit 4.
Limit the voltage applied to.

The power storage unit 5 normally stores electric charges, discharges while the voltage of the commercial power supply 1 is being cut by the rectification unit 2, and supplies the relay control unit 4 with the voltage having the waveform shown in FIG. . The constant voltage unit 6 is for keeping the voltage applied to the relay control unit 4 at a predetermined value.

The relay 7 is controlled by the relay control unit 4 and controls the energization of the heater unit 9 for heating the base unit 8. The rectification unit 2, the voltage drop unit 3, the relay control unit 4, the power storage unit 5, and the like are soldered to the printed wiring board 10 and attached inside the handle 11 of the iron body.

The voltage drop unit 3 is composed of an autotransformer 12, as shown in FIG. 12, in order to reduce heat generation of resistance.
There is also a configuration in which a rectifying unit 2 for full-wave rectification is connected to the output side of the autotransformer 12. Note that 13 is a resistor for limiting current.

[0007]

In such a conventional structure, since the voltage of the commercial power source 1 varies depending on the place and time, the voltage lower than the rated voltage, for example, 85% of the rated voltage.
It is designed to operate normally even at a voltage of%.

On the other hand, since the voltage across the relay control unit 4 is usually low (for example, 5V), the voltage across the voltage drop unit 3 is high, and when the voltage of the commercial power supply 1 is high, for example, 115% of the rated voltage. At the voltage of, the power consumption of the voltage drop unit 3 becomes large and the heat generation becomes large, and when ironing,
There is a problem that the temperature of the handle 11 rises due to the heat generation of the voltage drop section 3 and the temperature of the handle 11 changes depending on the voltage of the commercial power supply 1.

If the current flowing through the constant voltage section 6 is i1 and the voltage across the constant voltage section is V1, the constant voltage section 6 has the characteristics shown in FIG. 13, and even if the voltage of the commercial power supply 1 fluctuates. It is designed to maintain a constant voltage. However, similarly to the voltage drop unit 3 described above, the constant voltage unit 6 also has a problem in that when the voltage of the commercial power supply 1 is high, heat generation increases with power consumption.

The present invention solves the above problems and suppresses the heat generation of the voltage drop section or the constant voltage section even when the voltage of the commercial power source is higher than the rated voltage so that the handle temperature does not change depending on the voltage. The purpose is to do.

[0011]

In order to achieve the above object, the present invention provides a commercial power source, a rectifying section for rectifying the voltage of the commercial power source, and a voltage drop section for dropping the output voltage of the rectifying section. , A control unit for controlling the voltage drop unit, a relay control unit driven by the output voltage of the voltage drop unit, a constant voltage unit for making the voltage across the relay control unit constant, and the relay control unit. It is provided with a relay for controlling the energization of the heater section which is controlled, and the control section controls the voltage drop section by the voltage of the commercial power source, which is a first problem solving means.

Further, the commercial power source, a rectifying section for rectifying the voltage of the commercial power source, a voltage dropping section for dropping the output voltage of the rectifying section, a control section for controlling the voltage dropping section, and the voltage dropping section. A relay controller driven by the output voltage of
A constant voltage unit that keeps the voltage across the relay control unit constant, and a relay that is controlled by the relay control unit and controls the energization of the heater unit, and the control unit uses a current that flows through the constant voltage unit to control the voltage. The second means for solving the problem is to control the descending portion.

Further, the voltage drop unit of the first or second problem solving means is configured by connecting a plurality of resistors in parallel,
The control unit controls the resistance values of the plurality of resistors as a third problem solving means.

Further, the voltage drop unit of the first or second problem solving means is configured by connecting a plurality of resistors in series,
The control unit controls the resistance values of the plurality of resistors as a fourth problem solving means.

The voltage drop unit of the first or second problem solving means is composed of a transformer, and the control unit controls the output voltage of the transformer. I am trying.

[0016]

According to the present invention, the voltage of the commercial power source is high (for example, 115% of the rated voltage) by the above-mentioned first problem solving means.
%), The heat generation of the voltage drop section and the constant voltage section can be made almost the same as the heat generation at the lower limit value of the commercial power supply voltage (for example, 85% of the rated voltage). It is possible to eliminate the discomfort that the temperature of the handle changes due to the change in heat generation of the voltage drop unit and the constant voltage unit due to the change in the voltage of the commercial power source.

Further, according to the second means for solving the problem, the current flowing through the constant voltage section is lower than the lower limit value of the voltage of the commercial power source (for example,
In the range of 85% of the rated voltage) to the upper limit (for example, 115% of the rated voltage), the voltage changes linearly. Therefore, by controlling the voltage drop section by the current flowing in the constant voltage section, It is possible to make the heat generation of the drop portion substantially the same, and it is possible to eliminate the conventional discomfort that the temperature of the handle changes due to the change of heat generation of the voltage drop portion due to the change of the voltage of the commercial power supply.

Further, according to the third means for solving the problems, the heat generation of each resistor can be made substantially the same by switching the resistors connected in parallel and having different resistance values depending on the voltage of the commercial power source or the current flowing in the constant voltage section. .

Further, according to the fourth means for solving the problems, by switching the resistors connected in series by the voltage of the commercial power source or the current flowing in the constant voltage section, it is possible to reduce the heat generation of each resistor, and the total heat generation. It can be reduced.

Further, the fifth problem solving means can reduce the heat generation of the transformer and control the output voltage of the transformer when the voltage of the commercial power source changes to thereby control the current limiting resistance. The heat generation can be made almost the same.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 1, the voltage detector 14 detects the voltage of the commercial power source 1 and outputs its output to the controller 1.
It outputs to 5. As shown in FIG. 2, the voltage drop unit 16 uses a plurality of resistors R1, R2, and R3 having a resistance value of R1 <R2 <R3, and connects the contacts S2 to S4 of the switch 17 to each resistor. Connected. The switch 17 is switched by the control unit 15.

The operation of the above configuration will be described. When the control unit 15 determines from the output of the voltage detection unit 14 that the voltage of the commercial power source 1 is high, the contacts S1 and S4 of the switch 17 are closed to close the voltage drop unit 3. The resistance value of is set to the maximum value.
On the contrary, when it is determined that the voltage of the commercial power source 1 is low, the contacts S1 and S2 of the switch 17 are closed to set the resistance value of the voltage drop unit 3 to the minimum value.

As a result, the heat generation of the voltage drop section 16 can be made substantially the same even when the voltage of the commercial power source 1 changes, and the handle 1 can be changed by the conventional change of the voltage of the commercial power source 1.
It is possible to eliminate the discomfort that the temperature of 1 changes.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the voltage drop unit 16 is formed by connecting a plurality of resistors R1, R2 and R3 in series. The switch 17 is switched by the control unit 15, and the resistor R3 or R2 and R3 are short-circuited. The other structure is the same as that of the first embodiment.

To explain the operation in the above configuration, when the control unit 15 determines from the output of the voltage detection unit 14 that the voltage of the commercial power source 1 is high, the switches SW1 and SW2 are opened to cause the voltage drop unit 16 to operate. Resistance value is R1 + R2
It becomes + R3 and becomes the maximum. On the contrary, when it is determined that the voltage of the commercial power supply 1 is low, the switch SW1 is opened and SW2 is closed, so that the resistance value of the voltage drop unit 16 becomes R1 and becomes the minimum.

As a result, the heat generation of the voltage drop section 16 can be made substantially the same even when the voltage of the commercial power source 1 changes, and when the voltage of the commercial power source 1 is high, three resistors are connected in series. Therefore, the heat generation per resistor can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the voltage drop unit 16 is constructed by using an autotransformer 18, and contacts R2 to S7 of the rectifying unit 2 and the switch 17 are drawn from the coil. In addition,
Reference numeral 13 is a current limiting resistor. The other structure is the same as that of the first embodiment.

To explain the operation in the above configuration, when the control unit 15 determines from the output of the voltage detection unit 14 that the voltage of the commercial power source 1 is high, the contacts S4 and S1 and S5 and S8 of the switch 17 are closed, Conversely, when it is determined that the voltage of the commercial power source 1 is low, the contacts S2 and S of the switch 17
1 and S7 and S8 are closed. As a result, even if the voltage of the commercial power supply 1 changes, the heat generation of the current limiting resistor 13 can be made substantially the same.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the voltage drop section 16 is constructed by using an insulating transformer 19, and a switch 1 is formed from a secondary coil.
7 contacts S2 to S4 are drawn out. The other structure is the same as that of the first embodiment.

To explain the operation in the above configuration, when the control unit 15 determines from the output of the voltage detection unit 14 that the voltage of the commercial power source 1 is high, the contacts S4 and S1 of the switch 17 are closed, and vice versa. When it is determined that the voltage of the power source 1 is low, the contacts S2 and S1 of the switch are closed. As a result, even when the voltage of the commercial power supply 1 changes, the voltage applied to the rectification unit 2 can be made substantially the same.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the current detecting section 20 detects the current of the constant voltage section 6, and outputs its output to the control section 21.
Is output to. The voltage drop unit 16 includes the above first to fourth
The control unit 21 controls the voltage drop unit 16 by the current flowing through the constant voltage unit 6 in the same manner as in the above embodiment.

To explain the operation in the above configuration, the current flowing through the constant voltage unit 6 is changed from the lower limit value of the voltage of the commercial power source 1 (eg 85% of the rated voltage) to the upper limit value thereof (eg, 85% of the rated voltage).
In the range of 115% of the rated voltage), the voltage changes linearly. Therefore, by controlling the voltage drop unit 16 by the current flowing in the constant voltage unit 6, the heat generation of the voltage drop unit 16 can be made almost the same. Therefore, it is possible to eliminate the discomfort that the temperature of the handle changes due to the change in heat generation of the voltage drop unit 16 due to the change in the voltage of the commercial power supply 1.

[0038]

As described above, the present invention controls the commercial power source, the rectifying unit that rectifies the voltage of the commercial power source, the voltage lowering unit that lowers the output voltage of the rectifying unit, and the voltage lowering unit. A control unit, a relay control unit driven by the output voltage of the voltage drop unit, a constant voltage unit that keeps the voltage across the relay control unit constant, and an energization of the heater unit controlled by the relay control unit. Since the control unit controls the voltage drop unit by the voltage of the commercial power supply, even if the voltage of the commercial power supply is higher than the rated voltage, the control unit does not generate heat. Therefore, it is possible to eliminate the uncomfortable feeling that the temperature of the handle changes due to the change in heat generation of the voltage drop unit and the constant voltage unit due to the change in the voltage of the commercial power supply.

Further, the commercial power source, a rectifying section for rectifying the voltage of the commercial power source, a voltage dropping section for dropping the output voltage of the rectifying section, a control section for controlling the voltage dropping section, and the voltage dropping section. A relay controller driven by the output voltage of
A constant voltage unit that keeps the voltage across the relay control unit constant, and a relay that is controlled by the relay control unit and controls the energization of the heater unit, and the control unit uses a current that flows through the constant voltage unit to control the voltage. By controlling the voltage drop section, it is possible to suppress heat generation in the voltage drop section or constant voltage section even when the voltage of the commercial power supply is higher than the rated voltage. It is possible to eliminate the uncomfortable feeling that the temperature of the handle changes due to the change in heat generation of.

Further, since the voltage drop unit is constructed by connecting a plurality of resistors in parallel, and the control unit controls the resistance values of the plurality of resistors, the resistors connected in parallel have different resistance values. By switching between, the heat generation of each resistor can be made substantially the same, and the circuit configuration for controlling the voltage control unit can be simplified.

Further, the voltage drop unit is constructed by connecting a plurality of resistors in series, and the control unit controls the resistance values of the plurality of resistors. Therefore, by switching the resistors connected in series, The heat generation of each resistor can be reduced, and the heat generation of the whole can be reduced.

Further, since the voltage drop unit is composed of a transformer and the control unit controls the output voltage of this transformer, heat generation of the transformer can be reduced and
By controlling the output voltage of the transformer when the voltage of the commercial power source changes, the heat generation of the current limiting resistor can be made substantially the same.

[Brief description of drawings]

FIG. 1 is a block diagram of an iron according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a voltage drop unit of the iron.

FIG. 3 is a circuit diagram of a voltage drop unit of the iron according to the second embodiment of the present invention.

FIG. 4 is a circuit diagram of a voltage drop unit of an iron according to a third embodiment of the present invention.

FIG. 5 is a circuit diagram of a voltage drop unit of an iron according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram of an iron according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram of an example of a conventional iron.

FIG. 8 is a partially cutaway front view of the iron.

FIG. 9 is a voltage waveform diagram of a commercial power supply of the iron.

FIG. 10 is a waveform diagram of the output voltage of the rectifying unit of the iron.

FIG. 11 is a waveform diagram of the output voltage of the power storage unit of the iron.

FIG. 12 is a block diagram of another example of a conventional iron.

FIG. 13 is a characteristic diagram of the constant voltage part of the iron.

[Explanation of symbols]

 1 Commercial power supply 2 Rectification unit 4 Relay control unit 6 Constant voltage unit 7 Relay 9 Heater unit 15 Control unit 16 Voltage drop unit

Claims (5)

[Claims] 1. A commercial power supply, a rectification unit that rectifies the voltage of the commercial power supply, a voltage drop unit that drops the output voltage of the rectification unit, a control unit that controls the voltage drop unit, and the voltage drop unit. And a relay control section driven by the output voltage of the relay control section, a constant voltage section for making the voltage across the relay control section constant, and a relay controlled by the relay control section for controlling the energization of the heater section. The iron part is configured to control the voltage drop part according to the voltage of the commercial power supply. 2. A commercial power source, a rectifying unit that rectifies the voltage of the commercial power source, a voltage drop unit that drops the output voltage of the rectifier unit, a control unit that controls the voltage drop unit, and the voltage drop unit. And a relay control section driven by the output voltage of the relay control section, a constant voltage section for making the voltage across the relay control section constant, and a relay controlled by the relay control section for controlling the energization of the heater section. The iron part is such that the voltage drop part is controlled by the current flowing through the constant voltage part. 3. The iron according to claim 1, wherein the voltage drop unit is configured by connecting a plurality of resistors in parallel, and the control unit controls resistance values of the plurality of resistors. 4. The iron according to claim 1, wherein the voltage drop unit is configured by connecting a plurality of resistors in series, and the control unit controls the resistance value of the plurality of resistors. 5. The iron according to claim 1, wherein the voltage drop unit is composed of a transformer, and the control unit controls the output voltage of the transformer.