JP5295012B2 - Heating device and hair care device provided with the same - Google Patents

Description

  The present invention relates to a heating device that controls supply of power to a control unit that controls a heating unit, and a hair care device including the heating device.

  Conventionally, as this type of technology, for example, those described in the following documents are known (see Patent Document 1). This document 1 describes the technology of a hot air blower for a futon that controls the temperature of a heater by an energization control circuit controlling the heater on / off based on a signal from a microcomputer.

JP-A-7-136393

  In the above prior art, when a commercial power source is turned on to the blower, a driving power source for driving a microcomputer and an energization control circuit is provided from a DC power source circuit. In such a configuration, when commercial power is supplied to the blower, drive power is supplied to the microcomputer and the energization control circuit to supply current regardless of whether the heater is turned on or off. For this reason, even when the blower is not blowing warm air, electric power is consumed, standby power is increased, and there is a possibility that a running cost increases.

  Therefore, the present invention has been made in view of the above, and an object thereof is to provide a heating device with reduced running cost and a hair care device including the same.

According to the first aspect of the present invention, a power supply unit that supplies predetermined power, a heating unit that receives and supplies power from the power supply unit via the first power supply path, and a first power supply path And a power control switch unit that selectively supplies power to the heating unit, and a power supply unit that receives power from the power source unit via the second power supply path. a control unit for controlling the supply, is inserted in the second power supply path, have a first switch unit for selectively supplying power to the control unit, the control unit, energization heating unit is energized In the heating device that changes the energization rate of the heating unit by changing the cycle, it has a temperature detection unit that detects the temperature of the heating unit, and the energization rate of the heating unit is determined by the target set temperature of the heating unit and the temperature detection unit. The controller changes the temperature based on the temperature difference from the changed temperature of the heating unit. The temperature change per unit time is calculated, the feedback amount inversely proportional to the calculated temperature change is calculated, the temperature change and the feedback amount are weighted according to the heat capacity of the heating unit, and the weighted temperature change and the feedback amount are used. It is characterized by changing the energization rate .

According to a second aspect of the present invention, a hair care device includes the heating device according to any one of the first to fifth aspects.

According to the first aspect of the present invention, standby power can be reduced, and running costs can be reduced. According to the first aspect of the present invention, it is possible to smoothly change the temperature of the heating unit, and temperature control can be performed stably. Thereby, unnecessary power is reduced, low power consumption is achieved, and running cost can be reduced. According to the first aspect of the present invention, it is possible to realize temperature control in which the temperature of the heating unit rises rapidly and the temperature fluctuation range is small with respect to the set temperature. Thereby, temperature control can be performed stably, low power consumption can be achieved, and running cost can be reduced. Further, according to the first aspect, stable temperature control can be carried out even for apparatuses having different heat capacities, low power consumption can be achieved, and running cost can be reduced.

According to claim 2 , it is possible to provide a hair care device that reduces standby power and running costs.

It is a block diagram which shows the structure of the heating apparatus which concerns on Example 1 of this invention. It is a figure which shows one specific structural example of the apparatus shown in FIG. It is a figure which shows the mode of the temperature control of the heating part in the apparatus structure shown in FIG. It is a figure which shows the pattern of electricity supply in the heating apparatus which concerns on Example 2 of this invention. It is a figure which shows the mode of the temperature control in the heating apparatus which concerns on Example 3 of this invention. It is a figure which shows the mode of the temperature control in the heating apparatus which concerns on Example 4 of this invention. It is sectional drawing which shows the structure of the hair dryer as a hair care apparatus concerning Example 7 of this invention. It is the side view and sectional drawing which show the structure of the hair iron as a hair care apparatus concerning Example 7 of this invention. It is sectional drawing which shows the structure of the hairbrush as a hair care apparatus concerning Example 7 of this invention.

  Embodiments for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration of a heating apparatus according to Embodiment 1 of the present invention. The heating apparatus according to the first embodiment shown in FIG. 1 includes a power supply unit 1, a main body (first) switch unit 2, a control unit 3, a heating unit 4, a temperature detection unit 5, and a power control switch unit 6. Yes.

  The power supply unit 1 is configured to include a DC power supply having a preset power, or is configured to receive an AC power supply, and supplies power to the entire apparatus. The main body switch unit 2 is connected between the power supply unit 1 and the control unit 3, and performs switching control of power supply from the power supply unit 1 to the control unit 3 by turning on / off the switch. The control unit 3 is supplied with power from the power supply unit 1 via the main body switch unit 2 and controls the switching (on / off) of the power control switch unit 6 based on the temperature of the heating unit 4, thereby heating the control unit 3. The drive current supplied to the unit 4 is controlled. Under the control of the control unit 3, the heating unit 4 is supplied with a drive current from the power supply unit 1 through the power control switch unit 6, and generates heat to heat to a preset temperature. The temperature detection unit 5 detects the temperature of the heating unit 4 and gives the detected temperature to the control unit 3. The power control switch unit 6 is directly connected to the power supply unit 1 and performs switching control of the supply of power to the heating unit 4 under the control of the control unit 3.

  FIG. 2 is a diagram showing a specific configuration example of the heating apparatus shown in FIG. In FIG. 2, the power supply unit 1 of the heating device is configured by a DC power supply VCC that supplies predetermined power, and the main body switch unit 2 is configured by, for example, a slide switch SW1. In addition, the power supply part 1 has a function which rectifies | straightens and smoothes AC power supply, and converts it into DC power, when receiving AC power supply. The control unit 3 includes a microcomputer M1 including resources such as a CPU, a storage device, and an input / output device necessary for a computer that controls various operation processes based on a program. Moreover, the control part 3 is provided with resistance R1 connected in series with the temperature detection part 5 between DC power supply VCC.

  The heating unit 4 is composed of a resistor R. The temperature detection unit 5 includes a thermistor R2, and the voltage of the DC power supply VCC is divided by the resistor R1 and the thermistor R2, and the divided voltage obtained at the series connection point of the resistor R1 and the thermistor R2 is the temperature detection signal. As given to the microcomputer M1. The power control switch unit 6 includes a thyristor Q connected between the heating unit 4 and the DC power supply VCC, and the thyristor Q is switching-controlled by controlling the gate current by the microcomputer M1.

  In such a configuration, when the slide switch SW1 of the main body switch unit 2 is switched from the off state to the on state and becomes conductive, the rated current preset in the microcomputer M1 from the DC power supply VCC is supplied to the microcomputer M1 and the microcomputer Becomes the operating state. Thereafter, a divided voltage obtained by dividing the voltage of the DC power supply VCC by the resistor R1 and the thermistor R2 is given to the microcomputer M1, and this divided voltage and the set temperature (heating target) of the heating unit 4 converted into a voltage value. Temperature) is compared by the microcomputer M1. The set temperature is determined in advance as a predetermined value and is stored and held in a storage device of the microcomputer M1.

  If the temperature detected by the thermistor R2 is equal to or lower than the set temperature as a result of the comparison, an H (high) level switching control signal is given from the microcomputer M1 to the thyristor Q as shown in FIG. Thereby, the thyristor Q is changed from the non-conductive state to the conductive state, and the drive current is supplied from the DC power supply VCC to the resistor R of the heating unit 4. As a result, the heating unit 4 generates heat, and the temperature of the heating unit 4 gradually increases from room temperature as shown in FIG.

  In such a state, when the temperature of the heating unit 4 detected by the thermistor R2 reaches or exceeds a predetermined set temperature, the switching control signal supplied from the microcomputer M1 to the thyristor Q is changed from H level to L (low). The thyristor Q shifts from the conductive state to the non-conductive state. Thereby, supply of the drive current to the heating unit 4 is cut off, heat generation is stopped, and the heating unit 4 drops in temperature. In this way, the heating unit 4 is held at the set temperature by supplying / cutting off the drive current supplied from the DC power supply VCC to the heating unit 4 by switching control of the thyristor Q.

  In the first embodiment, when the main body switch unit 2 is turned off and power is not supplied to the control unit 3, the power control switch unit 6 is also turned off, and the power source unit 1 to the control unit 3 and the power control switch are switched off. Supply of current to 6 is avoided. As a result, standby power can be reduced, and running costs can be reduced.

  In addition, when the main body switch unit 2 is turned off and the apparatus is in a non-operating state, no power is supplied to the control unit 3, so that the possibility that the control unit 3 malfunctions due to the influence of noise or the like can be avoided. Further, it is avoided that the drive current supplied to the heating unit 4 is energized to the main body switch unit 2. As a result, the operating current of the microcomputer M <b> 1 that is smaller than the driving current supplied to the heating unit 4 is supplied to the main body switch unit 2. Therefore, the main body switch unit 2 can be configured with a switch having a smaller rated current than when the drive current of the heating unit 4 is energized, and the configuration can be reduced in size.

  FIG. 4 is a timing chart in the temperature control employed in the heating apparatus according to the second embodiment of the present invention. In the first embodiment, the switching control signal given from the microcomputer M1 constituting the control unit 3 to the gate terminal of the thyristor Q constituting the power control switch unit 6 is as shown in FIG. Although the level has changed from low level to high level or from high level to low level based on temperature, the second embodiment is characterized in that switching control of the thyristor Q is performed with a preset energization (on / off) pattern. Yes.

  As the switching control signal supplied from the microcomputer MC1 to the gate terminal of the thyristor Q, a signal having a current-carrying period from pattern 0 to pattern 5 as shown in FIG. 4 is prepared. That is, with respect to the preset unit cycle, pattern 0 is energization cycle: 0, pattern 1 is energization cycle: 5, energization rate: 1, pattern 2 is energization cycle: 4, energization rate: 1/4, pattern 3 Is set to energization cycle: 3, energization rate: 1/3, pattern 4 is set to energization cycle: 2, energization rate: 1/2, and pattern 5 is set to energization cycle: 1 and energization rate: 1.

  The switching control signals having a plurality of different energization patterns are appropriately selected and combined and supplied to the thyristor Q, that is, the energization rate is changed by intermittently energizing the heating unit 4 so that heating is performed at a temperature lower than the set temperature. While the drive current is supplied to the unit 4, the temperature of the heating unit 4 can be accurately controlled as compared with a simple on / off control that cuts off the drive current to the heating unit 4 above the set temperature. Thus, temperature controllability can be improved. Thereby, it becomes possible to make the temperature change of the heating part 4 smooth, the temperature change of the heating part 4 decreases, and temperature control can be performed stably. Therefore, unnecessary power is reduced, power consumption is reduced, and running cost can be reduced.

  FIG. 5 is a timing chart in the temperature control employed in the heating apparatus according to the third embodiment of the present invention. The feature of the third embodiment is that the difference between the set temperature of the heating unit 4 and the current temperature of the heating unit 4 detected by the thermistor R2 constituting the temperature detection unit 5 with respect to the previous example 2. Based on this, the energization pattern shown in FIG. 4 is selected.

  First, when the main body switch 2 is turned on from the off state and the heating unit 4 is at room temperature, the temperature difference between the temperature of the heating unit 4 and the set temperature is large. In this case, the pattern 5 shown in FIG.

  After that, when the temperature of the heating unit 4 rises and the temperature of the heating unit 4 reaches (set temperature −8 ° C.), the pattern 4 shown in FIG. 4 is selected and the energization rate is reduced to ½. Subsequently, as the temperature of the heating unit 4 rises, the temperature of the heating unit 4 is (set temperature -6 ° C.) and the pattern 3 shown in FIG. The pattern 2 shown in FIG. 4 is selected when the temperature is (set temperature −4 ° C.), the energization rate is ¼, and the pattern 1 shown in FIG. 4 is selected when the temperature of the heating unit 4 is (set temperature −2 ° C.). The energization rate is 1/5.

  Thereafter, when the temperature of the heating unit 4 reaches the set temperature, the pattern 0 is selected and no current is supplied, and this state is maintained until the temperature of the heating unit 4 falls below the set temperature. When the temperature of the heating unit 4 becomes lower than the set temperature, the pattern 1 shown in FIG. 4 is selected, the energization rate is set to 1/5, and energization is started again. As the temperature of the heating unit 4 decreases, the heating unit 4 The pattern 2 shown in FIG. 4 is selected when the temperature is (set temperature −2 ° C.), the energization rate is ¼, and the pattern 3 shown in FIG. 4 is selected when the temperature of the heating unit 4 is (set temperature −4 ° C.). The energization rate is 1/3. As described above, the temperature control is performed so that the energization rate is changed according to the temperature difference between the temperature of the heating unit 4 and the set temperature so that the temperature of the heating unit 4 converges to the set temperature. If the temperature of the heating unit 4 cannot be maintained unless the heating unit 4 is energized even if the temperature of the heating unit 4 exceeds the set temperature due to the heat capacity of the heating unit 4, the temperature of the heating unit 4 is Continue energizing even if the temperature exceeds the set temperature.

  Thus, in the said Example 3, when the temperature of the heating part 4 is significantly lower than preset temperature, the temperature of the heating part 4 can be raised rapidly by setting an electricity supply rate to 1. In addition, by reducing the energization rate stepwise as the temperature of the heating unit 4 approaches the set temperature, it is possible to suppress a rapid increase in the temperature of the heating unit 4 and avoid overshoot. Furthermore, when the temperature of the heating unit 4 is lowered from the set temperature, it is possible to approach the target temperature by increasing the energization rate as the distance from the set temperature increases.

  By executing such temperature control by the microcomputer MC1, it is possible to realize temperature control in which the temperature of the heating unit 4 rises rapidly and the temperature fluctuation range is small with respect to the set temperature. Thereby, temperature control can be performed stably, unnecessary power is reduced, power consumption is reduced, and running costs can be reduced.

  FIG. 6 is a timing chart in the temperature control employed in the heating apparatus according to the fourth embodiment of the present invention. The feature of the fourth embodiment is that the feedback amount is taken into account when selecting the energization pattern employed in the third embodiment.

  The microcomputer MC1 stores the temperature of the heating unit 4 before the unit time and calculates the difference between the temperature before the unit time and the current temperature. For example, as shown in FIG. 6, when the temperature difference is 0, the temperature change is 0, and when the current temperature is 1 ° C. higher than the temperature before the unit time, the temperature change is +1, and the temperature before the unit time is reached. On the other hand, if the current temperature is 2 ° C higher, the temperature change is +2. If the current temperature is 1 ° C lower than the temperature before the unit time, the temperature change is -1. If the current temperature is high by 2 ° C., the temperature change is −2. The unit time is preset to an arbitrary time.

  The microcomputer MC1 calculates a feedback amount that is inversely proportional to the temperature change amount. For example, as shown in FIG. 6, when the temperature change is 0, the feedback amount is 0, when the temperature change is +1, the feedback amount is −1, when the temperature change is +2, the feedback amount is −2, and the temperature change is −1. Sometimes, the feedback amount is +1, and when the temperature change is -2, the feedback amount is +2.

  The energization patterns 0 to 5 similar to those in the third embodiment are quantified. That is, pattern 0 is 0, pattern 1 is +1, pattern 2 is +2, pattern 3 is +3, pattern 4 is +4, and pattern 5 is +5.

  The microcomputer MC1 adds the feedback amount calculated as described above and the numerical value obtained by digitizing the energization pattern, and selects the energization pattern corresponding to the numerical value of the addition result. When the addition result becomes negative, the pattern 0 is selected as 0.

  First, with respect to the temperature change of the heating unit 4, an energization pattern is selected in the same manner as in the third embodiment, that is, based on the difference between the current temperature of the heating unit 4 and the set temperature. The feedback amount at that time is calculated for the selected energization pattern, and the calculated feedback amount is added to the numerical value of the selected pattern.

  For example, in FIG. 6, when the heating unit 4 is energized and the temperature change is 0, the feedback amount becomes 0, and the feedback amount 0 is added to the numerical value +5 of the pattern selected at this time, and the added value Pattern 5 corresponding to +5 is selected. When the temperature of the heating unit 4 rises and the temperature change becomes +1, the feedback amount becomes −1, the feedback amount −1 is added to the numerical value +5 of the pattern 5 selected at that time, and the pattern corresponding to the added value +4 4 is selected. Similarly, as shown in FIG. 6, the energization pattern is determined by adding the feedback amount to the energization pattern selected by the method employed in the third embodiment.

  Thus, the temperature change per unit time of the heating unit 4 is detected, and the energization rate is lowered as the increase width of the temperature change is larger, so that the temperature of the heating unit 4 does not exceed the target temperature. it can. In addition, even when the difference between the actual temperature of the heating unit 4 and the temperature detected by the temperature detection unit 5 increases, the increase in the temperature change per unit time increases, the target temperature can be reduced. It can be made not to exceed too much.

  Similarly, it is possible to prevent the temperature of the heating unit 4 from being too lower than the target temperature by increasing the energization rate as the decrease width of the temperature change per unit time of the heating unit 4 is larger. In addition, even when the difference between the actual temperature of the heating unit 4 and the temperature detected by the temperature detection unit 5 increases, the reduction range of the temperature change per unit time increases, the target temperature is set to It is possible not to be too low.

  By executing such temperature control by the microcomputer MC1, it is possible to realize temperature control in which the temperature of the heating unit 4 rises rapidly and the temperature fluctuation range is small with respect to the set temperature. Thereby, temperature control can be performed stably, unnecessary power is reduced, power consumption is reduced, and running costs can be reduced.

  Next, a fifth embodiment of the present invention will be described. The fifth embodiment is characterized in that the temperature change and the feedback amount are weighted and adjusted in accordance with the heat capacity of the heating unit 4 with respect to the previous fourth embodiment.

  The microcomputer MC1 calculates a feedback amount corresponding to a value obtained by multiplying the temperature difference between the current temperature of the heating unit 4 and the set temperature by a coefficient A and the temperature difference between the current temperature of the heating unit 4 and the set temperature. And the value obtained by multiplying the value by the coefficient B is added, and the energization pattern corresponding to the added value is selected. Here, the magnitude relationship between the coefficient A and the coefficient B, which are weighted values, is set according to the heat capacity of the heating unit 4. The coefficient A <coefficient B when the heat capacity is large, and the coefficient A> when the heat capacity is small. Coefficient B.

  Thus, according to the heat capacity of the heating unit 4, it is selected whether the temperature change is reflected in the selection of the energization pattern rather than the feedback amount, or the feedback amount is reflected in the selection of the energization pattern rather than the temperature change. Is possible. As a result, by appropriately setting the coefficients A and B, it becomes possible to perform stable temperature control on devices having different heat capacities as in the fourth embodiment, and unnecessary power is reduced. Thus, low power consumption can be achieved, and running cost can be reduced.

  7-9 is a figure which shows the structure of the hair care apparatus carrying the heating apparatus of this invention, FIG. 7 is sectional drawing of a hair dryer, FIG. 8 (a) is a side view of a hair iron, The figure (b). Is a cross-sectional view of the iron shown in FIG. 9A, and FIG. 9 is a cross-sectional view of the hairbrush.

  In FIG. 7, a hair dryer as a hair care device has a cavity formed inside a case 12 forming an outer wall thereof, and an electrical component 13 constituting the heating device of the present invention is disposed and accommodated in the cavity. 13 is supplied with commercial power supplied through a power cord 14 and is turned on / off by a main body switch unit 2 provided on a grip unit 15 held by a user's hand. The heating unit 4 that warms the air blown from the outlet opening 16 is formed by, for example, winding a strip-like and corrugated plate-like electrical resistor along the inner periphery of the inner cylinder 17.

  In FIG. 8, the hair iron as the hair care device includes two arm portions 19a and 19b that can be expanded in a substantially V shape via the rotation connecting portion 18, and the tips of the arm portions 19a and 19b. Hair is pinched in the side pinching part 20 and heated by the heating part 4 for hair styling. A cavity is formed in the case 21 forming the outer wall of the hair iron, and electrical components 22 constituting the heating device of the present invention are arranged and housed in the cavity, and these electrical components 22 are connected via power cords 23. The supplied commercial power is supplied, and the power is turned on / off by the main body switch unit 2 provided on the arm unit 19b held by the user.

  In FIG. 9, the hair brush as a hair care device is formed in a rod shape, and the user holds the grip portion 24 and applies the brush portion 26 provided at the distal end portion 25 to the hair for hair styling. A cavity is formed in the case 27 forming the outer wall of the hairbrush, and electrical components 28 constituting the heating device of the present invention are arranged and housed in the cavity, and these electrical components 28 are given via a power cord 29. The commercial power supplied is supplied, and the main body switch unit 2 provided in the grip unit 24 is operated to turn on / off the power source. Blow holes 31 are formed at the root of the plurality of bristle 30 of the brush portion 26, and the heating unit 4 that warms the air blown from the blow holes 31 by the fan 32 is disposed in a cavity formed inside the case 27. Has been.

  Thus, by mounting the heating device of the present invention described in each of the above Examples 1 to 5 on the hair care device, temperature control can be performed stably, unnecessary power is reduced, and low The power consumption can be reduced and the running cost can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Power supply part 2 ... Main body switch part 3 ... Control part 4 ... Heating part 5 ... Temperature detection part 6 ... Power control switch part

Claims (2)

A power supply unit for supplying predetermined power;
A heating unit that receives and heats power from the power supply unit via a first power supply path;
A power control switch unit that is inserted into the first power supply path and selectively supplies power to the heating unit;
A control unit that receives supply of power from the power supply unit via a second power supply path and controls the selective power supply in the power control switch unit;
A first switch unit that is inserted into the second power supply path and selectively supplies power to the control unit ;
In the heating device that changes an energization rate of the heating unit by changing an energization cycle in which the heating unit is energized,
A temperature detection unit for detecting the temperature of the heating unit;
The energization rate of the heating unit is changed based on a temperature difference between the target set temperature of the heating unit and the temperature of the heating unit changed by the temperature detection unit,
The control unit calculates a temperature change per unit time of the heating unit, calculates a feedback amount inversely proportional to the calculated temperature change, and weights the temperature change and the feedback amount according to a heat capacity of the heating unit. Then, the heating rate is changed based on the weighted temperature change and feedback amount . A hair care device comprising the heating device according to claim 1 .

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