JPH08131699A - Cordless iron - Google Patents

Abstract

PURPOSE: To transmit reliable signals on temperature between an iron and its rest. CONSTITUTION: The first switching part 12 on the iron 10 transmits the signals outputted from the temperature detector 7 which detects temperature of the base part to the first electrode P1, and a large amount of electricity is flown from the electrode P1 to the load resistance part 11. These two kinds of transmission are repeated alternately. The rest 13 inputs the temperature signals coming from the iron 10 through the second electrode P2 adjacent to the first electrode P1 to the temperature signal processing part 16, and judges whether the temperature is higher or lower than a prescribed temperature. The second switching part 17 outputs the power from the first electric source 14 to the second electrode P2 for the first prescribed period, and outputs the temperature signals from the iron 10 to the temperature signal processing part 16 for the second prescribed period, and these two kinds of transmission are repeated alternately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless iron which is used for preheating when an iron part is placed on a stand part, the heater part built into the base part of the iron part is heated by supplying electric power from the stand part. It is a thing.

[0002]

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

As shown in the figure, the iron part 1 is placed on the stand part 2 to heat the base part 3. When the iron part 1 is placed on the stand part 2, the iron part 1 is heated. The heater unit 4 is connected to the heater control unit 5 provided in the stand unit 2 via the electrode units P3, P4 and P5, P6 provided in both the iron unit 1 and the stand unit 2, and the heater unit 4 is connected to the heater unit 4 from the power supply unit 6. Electric power is supplied and heated.

The temperature detecting section 7 provided in the ironing section 1 detects the temperature of the base section 3 of the ironing section 1 and sends the signal to the temperature signal converting section 8. The temperature signal converter 8 converts the output signal of the temperature detector 7 into a pulse voltage and outputs it to the electrode P1.

This is because when the iron part 1 is placed on the stand part 2, the temperature signal is transmitted from the iron part 1 to the stand part 2 by the contact between the electrode P1 of the iron part 1 and the electrode P2 of the stand part 2. However, at this time, a large current and voltage are applied between the electrode portions P1 and P2 to destroy the insulating film generated between the electrodes, thereby enabling stable signal transmission without contact failure of the electrodes.

Thus, the temperature pulse signal input to the stand unit 2 through the electrodes P1 and P2 is processed by the temperature signal processing unit 9
Determines whether the temperature is higher or lower than the set temperature, and outputs the result to the heater control unit 5, and the heater control unit 5 uses the power supply unit 6 based on the output signal of the temperature signal processing unit 9.
The voltage from is turned on and off, and the heater part 4 of the iron part 1 is connected through the electrode P4 of the stand part and the electrode P3 of the iron part.
The power supply to the device was controlled to control the temperature.

[0007]

However, such a conventional structure requires the temperature signal converter 8 for converting the temperature signal mounted in the ironing unit 1 into a pulse signal. The section 8 has a complicated electronic circuit configuration, and has a problem that the shape is large and mounting is difficult.

The present invention is to solve the above-mentioned problems, and it is a first object of the present invention to provide a simple structure, a small shape, and a highly reliable temperature signal transmission between an iron part and a stand part.
The purpose is.

A second object of the present invention is to achieve the above first object and to perform a highly accurate temperature detection operation with a simple circuit configuration.

A third object of the present invention is to achieve the above first object and to enable highly reliable temperature detection without malfunction.

[0011]

In order to achieve the first object, the present invention comprises an iron part and a stand part on which the iron part is placed. The iron part heats a base part. Section, a temperature detection section for detecting the temperature of the base section, a first electrode section for transmitting an output signal of the temperature detection section to a stand section, a load resistance section for flowing a large current, and a temperature detection section for the temperature detection section. A first switching unit for alternately repeating an operation of sending an output signal to the first electrode unit and then flowing a large current from the first electrode unit to the load resistance unit;
The stand part receives a temperature signal from the iron part via the second electrode part which is in contact with the first electrode part of the iron part when the iron part is placed on the stand part and the second electrode part. A temperature signal processing unit for determining whether the temperature is higher or lower than a predetermined temperature, a first power supply unit, a second power supply unit for operating the temperature signal processing unit, and a first predetermined time for the first predetermined time. A second switching unit for alternately repeating the operation of outputting the output of the power supply unit to the second electrode unit and outputting the temperature signal from the ironing unit to the temperature signal processing unit for a second predetermined time; The first problem solving means is to include a heater control unit that controls the power supplied to the heater unit of the ironing unit by the output of the signal processing unit.

Further, in order to achieve the second object, the first power source section and the second power source section of the first problem solving means are constituted by a DC power source, and the temperature signal processing section is the second power source section. The second problem-solving means is that the output of the power source section is divided by the fixed resistor and the heat-sensitive element of the iron section, and the temperature is detected by this divided voltage.

In order to achieve the second object, the first power source unit of the first problem solving means is constituted by an AC power source and the second power source unit is constituted by a DC power source, and the temperature signal processing is performed. According to a third problem solving means, the section divides the output of the second power source section by the fixed resistor and the heat-sensitive element of the iron section and detects the temperature by the divided voltage.

Further, in order to achieve the third object, in addition to the first problem solving means, the first power source section is constituted by an AC power source and the second power source section is constituted by a DC power source,
The output current of the DC power supply is prevented from flowing into the AC power supply, and a third switching unit that controls the temperature detection unit of the iron unit to flow, and a control unit that controls the third switching unit, The second switching unit applies the output voltage of the AC power supply to the second electrode unit during the half cycle of the AC power supply, and the iron signal from the iron unit to the temperature signal processing unit that operates on the DC power supply during the other half cycle. The fourth problem solving means is configured to alternately repeat the operation of inputting the temperature signal of.

Further, in order to achieve the third object, the control unit of the above-mentioned fourth problem solving means is such that the absolute value of the output voltage of the DC power supply and the AC power supply in the same polarity period as the output voltage of this DC power supply. The absolute value of the output voltage of the DC power supply is compared, and when the absolute value of the output voltage of the AC power supply in the same polarity period as the output voltage of the DC power supply is higher than the absolute value of the output voltage of the DC power supply, the third switching The temperature signal from the iron unit is input to the temperature signal processing unit of the stand unit, the third switching unit is turned off in other periods, and current flows from the DC power supply to the AC power supply. The fifth problem solving means is configured to prevent the above.

In order to achieve the third object, the controller of the fourth problem solving means detects the polarity of the output voltage of the AC power supply, and this polarity is the same as the polarity of the output voltage of the DC power supply. A sixth problem solving means is configured such that when the polarity is No. 3, the third switching unit is turned on, and when the polarity is opposite, the third switching unit is turned off.

[0017]

According to the first means for solving the above problems, the present invention provides:
From the first power supply unit provided on the stand unit, the second switching unit and the first switching unit of the ironing unit keep the second electrode unit of the stand unit and the first electrode unit of the ironing unit for a first predetermined time. Through the load resistance part of the iron part, and then the second switching part and the first switching part of the iron part to the temperature signal processing part operated by the second power supply part provided in the stand part. Section inputs a temperature signal from the iron section to the temperature signal processing section of the stand section for a second predetermined time through the first electrode section of the iron section and the second electrode section of the stand section.

By this operation, a large current and a high voltage from the first power source unit of the stand unit for supplying the load resistance unit of the iron unit for the first predetermined time are supplied with the second electrode unit of the stand unit and the first electrode unit of the iron unit. Can be applied between the first electrode part and the second
The insulating film formed between the electrode part and the first electrode part can be destroyed to ensure sufficient conduction, and then the temperature signal from the ironing part is applied to the ironing part for the second predetermined time. It is possible to input to the temperature signal processing unit of the stand unit via the first electrode unit and the second electrode unit of the stand unit, and to perform stable temperature signal transmission without contact failure between the electrodes. Since the output from the second power supply unit having a low output voltage of the stand unit is applied to the temperature detection unit of the iron unit, the temperature detection unit can perform highly accurate temperature detection without self-heating. Like

Further, according to the second means for solving the problems, the direct current power source is used for the first power source section and the second power source section provided in the stand section, and the current from the second power source section to the first power source section is used. It is possible to eliminate the instability of movement due to the flow of
In addition, the output voltage of the second power supply unit is divided by the fixed resistor of the stand unit and the heat-sensitive element of the iron unit, and it is possible to detect the temperature by detecting that the divided voltage changes with temperature. The circuit enables highly accurate temperature detection.

According to the third means for solving the problems, an alternating current power source is used for the first power source section, a direct current power source is used for the second power source section, and a current from the second power source section to the first power source section is used. It is possible to eliminate the instability of movement due to the flow of
By dividing the output voltage of the second power supply unit by the fixed resistor of the stand unit and the heat-sensitive element of the iron unit, and detecting the temperature by detecting that the divided voltage changes with temperature,
Highly accurate temperature detection is possible with a simple circuit.

According to the fourth means for solving the problems, the AC power source is used for the first power source section, the DC power source is used for the second power source section, and the stand section is provided during the half cycle of the AC power source. The second switching unit and the first switching unit of the iron unit cause a large current to flow from the AC power supply to the load resistance unit of the iron unit via the second electrode unit of the stand unit and the first electrode unit of the iron unit. During the other half cycle of the AC power supply, by the second and third switching parts of the stand part and the first switching part of the iron part,
A direct current is supplied from the DC power source of the stand section to the temperature detection section of the iron section via the temperature signal processing section, the second electrode section, and the first electrode section of the iron section.

By this operation, a large current is applied to the load resistance section of the iron section for a half cycle of the AC power source to break the insulating film formed between the electrodes and ensure conduction.
Next, a direct current is passed through the temperature detection part of the iron part during the other half cycle of the AC power supply, and this direct current is set to a small value so that the temperature detection part does not self-heat and contact failure occurs between the electrodes. Not reliable temperature signal transmission can be performed. Furthermore, the third switching unit can prevent the current from flowing from the DC power supply, which is the power supply for performing the temperature detection operation, to the AC power supply.

Further, by the fifth means for solving the problems, the control unit compares the absolute value of the output voltage of the DC power supply with the absolute value of the output voltage of the AC power supply in the same polarity period as the output voltage of the DC power supply. However, when the absolute value of the output voltage of the AC power supply in the same polarity period as the output voltage of the DC power supply is higher than the absolute value of the output voltage of the DC power supply, the third switching unit is turned on to turn on the output of the DC power supply. By outputting to the second electrode unit via the temperature signal processing unit, the output of the DC power supply can be prevented from flowing into the AC power supply.

According to the sixth means for solving the problems, the control section detects the polarity of the output voltage of the AC power supply, and when this polarity is the same as the polarity of the output voltage of the DC power supply, the third switching section. Is turned on and the output of the DC power supply is output to the second electrode unit via the temperature signal processing unit, whereby the output of the DC power supply can be prevented from flowing into the AC power supply.

[0025]

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 designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the iron part 10 supplies electric power from the third electrode part P3 to the heater part 4 for heating the base part (not shown), and the temperature of the base part is detected by the temperature detecting part 7. To detect.

The load resistance unit 11 allows a large current to flow, and the first switching unit 12 causes the current from the first power supply unit 14 of the stand unit 13 to flow to the load resistance unit 11 for a first predetermined time, The temperature signal from the temperature detector 7 is output to the stand 12 for a predetermined time 2.

The first electrode portion P1 applies the voltage from the stand portion 13 to the first switching portion 12 and outputs the output signal from the temperature detecting portion 7 to the first switching portion 12 as well.
And output to the stand unit 13.

The stand portion 13 is provided with a heater power source 15 which is a commercial power source, a heater control portion 5, and a fourth electrode portion P.
Electric power is supplied to the heater section 4 of the ironing section 10 via the third electrode section P3 of the ironing section 4 and the ironing section 10. The temperature signal processing unit 16 inputs the temperature signal from the ironing unit 10, determines whether the temperature of the base unit of the ironing unit 10 is higher or lower than the set temperature, and outputs the determination result to the heater control unit 5. To do.

The heater control section 5 has the temperature signal processing section 1
When the base temperature is higher than the set temperature, the power supplied from the heater power supply 15 is turned off, and when it is low, the power is turned on.

The second switching section 17 outputs the output of the first power supply section 14 to the second electrode section P2 which is in contact with the first electrode section P1 of the ironing section 10 for the first predetermined time, and the second switching section 17 outputs the second output section P2.
Output of the first power supply unit 14 for a predetermined time
The temperature signal from the ironing part 10 is output to the temperature signal processing part 16 via the second electrode part P2. The second power supply section 18 operates the temperature signal processing section 16 to perform a temperature detection operation.

The operation of the above configuration will be described with reference to FIG. FIG. 2 shows an example of the specific circuit of the essential parts of the first embodiment. The commercial power supply VAC constitutes the heater power supply 15. SW5 is a contact portion of a relay built in the heater control unit 5, and the relay of the heater control unit 5 turns on SW5 when the base temperature of the ironing unit 10 is low and the base temperature is high according to the signal of the temperature signal processing unit 16. Sometimes SW5
Is turned off to control the electric power supplied to the heater portion 4 built in the base portion of the ironing portion 10 to keep the temperature of the base portion constant.

Further, the first power source section 14 turns on the switch SW2 constituting the second switching section 17 and turns on the stand section 13 and the iron section 10 via the resistor R3.
Second and first electrode portions P2, P electrically connected to
1 is supplied with high voltage and large current.

The current from the first power source section 14 flowing into the ironing section 10 from the first electrode section P1 constitutes the load resistance section 11 when the switch SW4 constituting the first switching section 12 is turned on. Through the resistor R2, the electrode portion P5, the electrode portion P6, and the first power source portion 14.

The current and voltage from the first power supply section 14 have large values, and the second and first electrode sections P
Sufficient conduction can be obtained by destroying the insulating film generated between 2 and P1.

Further, the switches SW2 and SW1 forming the second switching unit 17 and the first switching unit 12
And SW4 and SW3 are configured to turn off the switch SW1 when the switch SW2 is turned on and turn off the switch SW3 when the switch SW4 is turned on, so that the first power supply unit 14 to the second power supply unit 18 or The temperature sensing portion 7 is prevented from flowing into the thermosensitive element Rth.

The operation of turning on the switch SW2 and turning off the switch SW1 and the operation of turning on the switch SW4 and turning off the switch SW3 are performed for a first predetermined time. Next, the switch SW1 is turned on and the switch SW2 is turned off for a second predetermined time, and the switch SW3 is turned on and the switch SW4 is turned off.

At this time, the current supplied from the second power source section 18 is the same as that of the resistor R1 constituting the temperature signal processing section 16.
The second and first electrode portions P2 are passed through the switch SW1.
The switch SW3, the thermosensitive element Rth, and the electrode portion P via P1
It returns to the 2nd power supply part 18 through 5 and P6.

In this current path, the resistor R1 and the heat sensitive element Rth
The voltage divided by is the temperature signal processing unit 1 as a temperature signal.
It is detected in 6 and it is judged whether it is higher or lower than the set temperature.

The current supplied from the second power source section 18 must be weak because it suppresses the self-heating of the thermosensitive element Rth. If this current is the only current, the second and first electrodes The insulating film made of an oxide film or the like generated between the portions P2 and P1 cannot be broken, and the resistance between the electrodes adds to the resistance value of the heat-sensitive element Rth, resulting in erroneous detection or no current flows at all. Will not do.

At this time, the current from the first power source section 14 described above flows between the second and first electrode sections P2, P1 and the insulating film can be destroyed to ensure a sufficient conductive state. The operation for ensuring the continuity of the electrode portion is performed for the first predetermined time, then the temperature detection operation is performed for the second predetermined time, and this operation is repeated, so that highly reliable temperature detection can be performed. It will be possible.

Needless to say, the switches SW4 and SW3 of the first switching unit 12 and the switches SW2 and SW1 of the second switching unit 17 may be semiconductor switching elements.

Next, a second embodiment of the present invention will be described with reference to FIGS. 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 AC power source 20 provided on the stand section 19 constitutes a first power source section, and the DC power source 21 constitutes a second power source section. Further, in this embodiment, the AC power source 20 is a commercial power source, and this power source also serves as a heater power source for supplying power to the heater section 4 of the iron section 22.

The second switching unit 23 and the first switching unit 24 are arranged so that the current from the AC power source 20 is applied to the load of the ironing unit 22 during a half cycle of the AC power source 20 constituting the first power source unit. The direct current power supply 21 constituting the second power supply unit is supplied to the resistance unit 11 to destroy the insulating film between the second and first electrode units P2 and P1 to secure conduction, and for the other half cycle period. Of the direct current of the iron portion 22 is made to flow into the temperature detecting portion 7 of the iron portion 22, and the temperature of the base portion of the iron portion 22 is detected.

When the DC current of the DC power supply 21 flows into the ironing portion 22, the output voltage (instantaneous value) of the AC power supply 20 may become lower than the output voltage of the DC power supply 21. A current will flow into the AC power supply 20, causing a malfunction in the temperature detection operation.

The control unit 25 detects that the current from the DC power supply 21 is about to flow into the AC power supply 20, and the third
The switching unit 26 is controlled to disconnect the circuit from the DC power supply 21 to the temperature signal processing unit 27 and below so that the current from the DC power supply 21 to the AC power supply 20 is cut off.

The operation of the above configuration will be described with reference to FIGS. 4 and 5. FIG. 4 shows an example of the specific circuit of the essential parts of the second embodiment. The second switching unit 23 is composed of diodes D1 and D2, and the first switching unit 24 is composed of diodes D3 and D4.

The AC power supply Vac constitutes the first power supply section, and the half cycle of the AC power supply Vac is the AC power supply Va.
c → electrode part P6 → electrode part P5 → resistor R2 → diode D
A large current flows through the path of 4 → first electrode portion P1 → second electrode portion P2 → diode D2 → resistance R3 → AC power supply Vac to secure conduction between the first and second electrode portions P1 and P2. .

The DC power source Vdc constitutes the second power source section, and when the switch SW1 constituting the third switching section 26 is on, the DC power source Vdc → switch SW1 → resistor R1 → diode D1 → Second electrode part P
2 → first electrode portion P1 → diode D3 → heat sensitive element Rt
A current flows through the path of h → electrode portion P5 → electrode portion P6 → DC power supply Vdc to perform a temperature detection operation.

When the output voltage of the AC power supply Vac is negative on the A side and positive on the B side, the AC current flows through the load resistance portion 11 (resistance R2) of the ironing portion 22 as described above. At this time, the DC power supply Vdc is present. If there is no switch SW1 and the switches SW1 are short-circuited, the DC current from V flows through Vdc → resistor R1 → diode D1 → diode D2 → resistor R3 → Vac, and the temperature detection operation malfunctions.

As a countermeasure against this malfunction, the control unit 25 controls the absolute value of the output voltage of the DC power supply Vdc and the DC power supply Vd.
The output voltage of c is compared with the absolute value of the output voltage of the AC power supply Vac in the same polarity period, and the absolute value of the output voltage of the DC power supply Vdc and the output voltage of the AC power supply Vac in the same polarity period is the output voltage of the DC power supply Vdc. When it is higher than the absolute value of (at time t1 in FIG. 5), the current does not flow from the DC power supply Vdc to the AC power supply Vac.
6 switch SW1 is turned on to perform the temperature detection operation,
In other periods (time t2 in FIG. 5), the switch SW1
By turning off, it is possible to stop the temperature detection operation and prevent malfunction of the circuit.

Further, the diode D5 passes through the path of the temperature signal processing section 27, and then from the DC power supply Vdc to the AC power supply Vac.
It prevents the electric current from flowing to.

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

As shown in the figure, the DC power source Vdc is
Of the second embodiment, the positive and negative polarities are connected in reverse. At this time, the diodes D8, D9 of the first switching section 24 and the diodes D6, D7 of the second switching section 23 are connected in reverse to the diodes D3, D4 and D1, D2 shown in FIG.

In the above structure, the operation will be described with reference to FIG. 7. The absolute value of the output voltage of the AC power supply Vac during the same polarity period as the output voltage of the DC power supply Vdc is the DC power supply Vdc.
When it is higher than the absolute value of the output voltage of dc (time t in FIG. 7).
In 1), since the current does not flow from the DC power supply Vdc to the AC power supply Vac, the switch SW1 of the third switching unit 26 is turned on to perform the temperature detection operation, and the other period (FIG. 7, time t2). Then, by turning off the switch SW1, the temperature detection operation can be stopped and the malfunction of the circuit can be prevented.

Next, a fourth embodiment of the present invention will be described. The control unit 25 in FIG. 4 detects the polarity of the AC power supply Vac, and when the polarity of the AC power supply Vac is the same as the polarity of the DC power supply Vdc (time t1 and time t3, t in FIG. 5).
4), the third switching unit 26 is turned on, and when the polarity is opposite, the third switching unit 26 is turned off. The other structure is the same as that of the second embodiment.

The operation of the above configuration will be described. When the polarity of the AC power supply Vac is the same as the polarity of the DC power supply Vdc, that is, time t1 and time t3, t4 in FIG.
During the period, when the third switching unit 26 is turned on, the time t1
Then, no current flows from the DC power supply Vdc to the AC power supply Vac.

During the time t3 and t4, the DC power supply V
Since the output voltage of dc is higher than the output voltage of the AC power supply Vac, current flows from the DC power supply Vdc to the AC power supply Vac, but this current has a small difference between the output voltage of the DC power supply Vdc and the output voltage of the AC power supply Vac, and Since it is a short time, the circuit operation can be kept safe.

When the polarity of the AC power supply Vac is different from the polarity of the DC power supply Vdc, the voltage difference between the output voltage of the AC power supply Vac and the output voltage of the DC power supply Vdc is large, and this time is half the cycle of the AC power supply Vac. Over time,
When the third switching unit 26 is turned on, a large current may flow from the DC power supply Vdc to the AC power supply Vac, which may cause the temperature detection operation to malfunction and further damage the circuit. Therefore, the control unit 25 causes the third switching operation. Part 26
The switch SW1 that constitutes the switch is turned off.

[0061]

As described above, the present invention includes an iron part,
The iron part comprises a stand part on which the iron part is placed. The iron part is a heater part for heating the base part, a temperature detecting part for detecting the temperature of the base part, and an output signal of the temperature detecting part for the stand part. A first electrode part for transmission, a load resistance part for flowing a large current, and an output signal of the temperature detection part are sent to the first electrode part, and then a large current is applied from the first electrode part to the load resistance part. A first switching unit that alternately repeats the operation of flowing into the iron unit, the stand unit including a second electrode unit that contacts the first electrode unit of the iron unit when the iron unit is placed on the stand unit; A temperature signal processing unit that inputs a temperature signal from the ironing unit via the second electrode unit and determines whether the temperature signal is higher or lower than a predetermined temperature, a first power supply unit, and the temperature signal processing unit are operated. A second power supply section,
The operation of outputting the output of the first power supply section to the second electrode section for a first predetermined time and outputting the temperature signal from the iron section to the temperature signal processing section for a second predetermined time is alternately repeated. By providing the second switching unit and the heater control unit that controls the power supplied to the heater unit of the ironing unit by the output of the temperature signal processing unit, the electrode unit provided in both the ironing unit and the stand unit. When the temperature signal is transmitted by the contact of, the weak switching signal of the iron part and the second switching part of the stand part allow a weak temperature signal current and a large current to flow alternately between the electrodes. Current is flowed during the first predetermined time to break the insulating film between the electrodes to ensure continuity, and then a second predetermined time is passed to send a weak temperature signal current to transmit the temperature signal, resulting in poor contact between the electrodes. No belief It is possible to perform sexual high temperature signal transmission.

Further, the first power source section and the second power source section are constituted by a DC power source, and the temperature signal processing section divides the output of the second power source section by the fixed resistor and the heat sensitive element of the iron section. Since the temperature is detected by the divided voltage, the first power source section for supplying a large current and the second power source section for constituting the power source for performing the temperature detecting operation are constituted by the DC power source. It is possible to perform a highly accurate temperature detection operation with a simple circuit configuration in which no current flows from the second power supply unit to the first power supply unit.

Further, the first power supply unit is composed of an AC power supply and the second power supply unit is composed of a DC power supply, and the temperature signal processing unit outputs the output of the second power supply unit to a fixed resistor and an iron unit. By dividing the voltage with the heat-sensitive element and detecting the temperature with this divided voltage, the first power supply section for flowing a large current is configured by the AC power supply, and the second power supply that performs the temperature detection operation is configured. By configuring the power supply unit with a DC power supply, it is possible to perform a highly accurate temperature detection operation with a simple circuit configuration in which no current flows from the second power supply unit to the first power supply unit.

Further, the first power source unit is constituted by an AC power source and the second power source unit is constituted by a DC power source, and an output current of the DC power source is prevented from flowing into the AC power source, and the temperature of the iron portion is A third switching unit that controls to flow to the detection unit and a control unit that controls the third switching unit are provided, and the second switching unit serves as the second electrode unit during a half cycle of the AC power supply. By applying the output voltage of the alternating current power supply and alternately repeating the operation of inputting the temperature signal from the iron part to the temperature signal processing part operated by the direct current power supply during the other half cycle period, the first
The predetermined time and the second predetermined time can be set as a half cycle period of the AC power supply that constitutes the first power supply unit,
A simple circuit configuration can be provided, and a current can be prevented from flowing from the DC power supply to the AC power supply by using the third switching unit, and reliable temperature detection without malfunction can be performed.

The control unit compares the absolute value of the output voltage of the DC power supply with the magnitude of the absolute value of the output voltage of the AC power supply in the same polarity period as the output voltage of the DC power supply to determine the output voltage of the DC power supply. When the absolute value of the output voltage of the AC power supply in the same polarity period is higher than the absolute value of the output voltage of the DC power supply, the third switching unit is turned on and the temperature signal from the iron unit is supplied to the temperature signal processing unit of the stand unit. By inputting and turning off the third switching unit in the other period to prevent the current from flowing from the DC power supply to the AC power supply, the reliability that the DC power supply does not flow into the AC power supply is obtained. It is possible to detect temperature with high property.

Further, the control unit detects the polarity of the output voltage of the AC power supply, and when this polarity is the same as the polarity of the output voltage of the DC power supply, turns on the third switching unit and sets the polarity of the opposite polarity. In this case, since the third switching unit is turned off, it is possible to perform highly reliable temperature detection without flowing from the DC power supply to the AC power supply.

[Brief description of drawings]

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

FIG. 2 is a specific circuit diagram of the main part of the cordless iron.

FIG. 3 is a block diagram showing a configuration of a cordless iron according to a second embodiment of the present invention.

FIG. 4 is a schematic circuit diagram of a main part of an example of the cordless iron.

FIG. 5 is a voltage waveform diagram showing a comparison between the output voltage of the AC power supply and the output voltage of the DC power supply of the cordless iron.

FIG. 6 is a specific circuit diagram of a main part of another example of the cordless iron.

FIG. 7 is a voltage waveform diagram showing a comparison between the output voltage of the AC power supply and the output voltage of the DC power supply of the cordless iron.

FIG. 8 is a perspective view of a conventional cordless iron.

FIG. 9 is a block diagram showing a configuration of the cordless iron.

[Explanation of symbols]

 4 Heater Section 5 Heater Control Section 7 Temperature Detection Section 10 Ironing Section 11 Load Resistance Section 12 First Switching Section 13 Stand Section 14 First Power Supply Section 16 Temperature Signal Processing Section 17 Second Switching Section 18 Second Power Supply Section P1 first electrode part P2 second electrode part

Claims (6)

[Claims] 1. An iron part, and a stand part on which the iron part is placed. The iron part comprises a heater part for heating a base part, a temperature detecting part for detecting a temperature of the base part, and the temperature part. A first electrode section for transmitting an output signal of the detection section to the stand section; a load resistance section for flowing a large current;
The output signal of the temperature detection unit is sent to the first electrode unit,
Next, a first switching unit that alternately repeats an operation of flowing a large current from the first electrode unit to the load resistance unit, and the stand unit is configured such that when the iron unit is placed on the stand unit, A second electrode portion that is in contact with the first electrode portion; a temperature signal processing portion that receives a temperature signal from the iron portion through the second electrode portion and determines whether the temperature signal is higher or lower than a predetermined temperature; A first power supply unit, a second power supply unit for operating the temperature signal processing unit, and a first predetermined time for the first predetermined time period.
A second switching unit for alternately repeating the operation of outputting the output of the power supply unit to the second electrode unit and outputting the temperature signal from the ironing unit to the temperature signal processing unit for a second predetermined time; A cordless iron, comprising: a heater control unit that controls the electric power supplied to the heater unit of the iron unit by the output of the temperature signal processing unit. 2. The first power supply section and the second power supply section are constituted by a DC power supply, and the temperature signal processing section divides the output of the second power supply section by a fixed resistor and a heat sensitive element of the iron section. The cordless iron according to claim 1, wherein the temperature is detected by the divided voltage. 3. The first power supply unit is composed of an AC power supply, the second power supply unit is composed of a DC power supply, and the temperature signal processing unit outputs the output of the second power supply unit to a fixed resistor and an ironing unit. The cordless iron according to claim 1, wherein the heat-sensitive element is used for voltage division, and the temperature is detected by the divided voltage. 4. The first power supply unit is composed of an AC power supply and the second power supply unit is composed of a DC power supply, and the output current of the DC power supply is prevented from flowing into the AC power supply, and the temperature of the iron part is controlled. A third switching unit that controls to flow to the detection unit and a control unit that controls the third switching unit are provided, and the second switching unit serves as the second electrode unit during a half cycle of the AC power supply. 2. The cordless cord according to claim 1, wherein the operation of inputting the temperature signal from the iron portion to the temperature signal processing portion operated by the DC power source is alternately repeated during another half cycle of the output voltage of the AC power source. Iron. 5. The control unit compares the absolute value of the output voltage of the DC power supply with the magnitude of the absolute value of the output voltage of the AC power supply in the same polarity period as the output voltage of the DC power supply, and outputs the output of the DC power supply. When the absolute value of the output voltage of the AC power supply in the same polarity period as the voltage is higher than the absolute value of the output voltage of the DC power supply, the third switching unit is turned on and the temperature signal from the iron unit is processed by the temperature signal of the stand unit. 5. The cordless iron according to claim 4, wherein the cordless iron is configured so that the third switching unit is turned off during another period of time to prevent a current from flowing from the DC power supply to the AC power supply. 6. The control unit detects the polarity of the output voltage of the AC power supply, and when this polarity is the same as the polarity of the output voltage of the DC power supply, turns on the third switching unit and reverses the polarity. The cordless iron according to claim 4, wherein the third switching unit is turned off in such a case.