JPH0739883B2 - Air temperature controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air temperature control device applied to a device for obtaining an air temperature such as a hair dryer.

[Background technology]

In a device that obtains air temperature, such as a hair dryer, even if there is a change in the ambient temperature due to summer or winter, or if there is a change in the air volume due to a decrease in the fan rotation speed or the suction port is blocked, the air temperature A phase control type air temperature control device is applied that can keep the temperature constant and variably set the air temperature. For example, in JP-A-59-156309, as shown in FIG. 10, the heater 70 is phase-controlled by a triac 71, and the conduction angle of the triac 71 is controlled by a positive temperature characteristic thermistor 72 to make the air volume constant. The positive temperature characteristic thermistor 72 has a variable resistor.
73 is connected in series and the air temperature is variably set. 74 is a bidirectional switch element that supplies a gate current to the gate of the phase control element 71, and 75 is a positive temperature characteristic thermistor 72 and a variable resistor 73.
Capacitor is charged through, 76 is a fan motor,
77 is a power supply.

However, if the resistance value of the variable resistor 73 is increased for the purpose of lowering the set temperature, for example, this air temperature control device operates as follows. That is, the conduction angle of the triac 71 decreases, the temperature of the heater 70 decreases, and the air temperature decreases. However, when the air temperature decreases, the temperature of the positive temperature characteristic thermistor 72 decreases → the resistance value of the positive temperature characteristic thermistor 72 decreases → the conduction angle of the triac 71 increases → the heater 70
Temperature rises → wind temperature rises. As a result, the variable resistor
Even if the set temperature is changed by changing the resistance value of 73, the positive temperature characteristic thermistor 72 does not change the air temperature so much. The same applies when raising the set temperature. Therefore, this air temperature control device has a drawback that the variable range of the set temperature is small. Further, in the case of a hair dryer, when the hair is dried and set, the setting of the air temperature according to the setting state or preference is limited, which is inconvenient to use.

[Object of the Invention]

An object of the present invention is to provide an air temperature control device that can obtain a stable air temperature at a set temperature and can change the set temperature in a wide range.

[Disclosure of Invention]

An air temperature control device according to a first aspect of the present invention includes a motor that drives a fan, a heater that heats the air blown by the fan, a phase control element that controls the phase of the heater, and the phase that detects the air temperature. A temperature sensor section for controlling the air temperature by controlling the control element, and a variable resistor for controlling the energizing amount of the heater piece, which is provided in the vicinity of the temperature sensor section, are provided. And a temperature variable setting means for variably setting the temperature detected by the temperature sensor unit.

An air temperature control device according to a second aspect of the present invention includes a motor that drives a fan, a heater that heats the air blown by the fan, a phase control element that controls the phase of the heater, and the phase that detects the air temperature. A temperature variable setting having a temperature sensor unit for controlling a constant air temperature by controlling a control element and a wind tunnel for guiding cold air from the fan to the temperature sensor unit and for adjusting an opening amount of the wind tunnel. And means.

An air temperature control device according to a third aspect of the present invention includes a motor that drives a fan, a heater that heats the air blown by the fan, a phase control element that controls the phase of the heater, and the phase that detects the air temperature. A temperature sensor unit for controlling a constant air temperature by controlling a control element, a heater piece arranged in the vicinity of the temperature sensor unit, and a voltage dividing resistance of the motor to control an energization amount of the heater piece. The temperature variable setting means has a variable resistor and further has a motor rotation speed setting means for variably setting the rotation speed by controlling the energization amount of the motor.

Action According to the configuration of the first aspect of the invention, when the motor is operated, the fan rotates to generate wind, and when the heater is energized, the temperature is raised.
In this case, the air temperature is stabilized by the temperature sensor unit and the phase control element, and the temperature sensor unit detects the air temperature heated by the heater piece in the vicinity thereof, and the heater piece is controlled by the variable resistor. The temperature of the air heated by the heater can be varied over a wide range.

According to the configuration of the second invention, the temperature sensor unit and the phase control element can stabilize the air temperature at the set temperature, and
By adjusting the opening of the wind tunnel with a shutter,
Since the cold air supplied to the temperature sensor unit can be controlled, the temperature control by the heater can be performed over a wide range.

According to the configuration of the third invention, the temperature sensor unit and the phase control element can stabilize the air temperature at the set temperature, and
The variable resistor enables temperature control over a wide range, and when the air volume changes by operating the motor rotation speed setting means, the heat generation amount of the voltage dividing resistor also changes and the air temperature detected by the temperature sensor changes, so the air volume changes. Even if it is, the wind temperature can be stabilized.

Embodiment A hair dryer to which an embodiment of the first invention is applied will be described with reference to FIGS. 1 to 3.

That is, the suction port 2 is formed in the rear part of the main body 1, the discharge port 3 is formed in the front end, and the motor 5, the air temperature control device 6, and the heater 7 in which the fan 4 is provided from the suction port 2 side are sequentially arranged inside. is doing. 8 is a switch for switching off, cool air, and hot air, 9 is a variable resistor, 10 is a temperature sensor unit having a positive temperature characteristic thermistor installed on a heater substrate 11 supporting the heater 7 as an embodiment,
Reference numeral 12 is a heater piece arranged on the windward side in the vicinity thereof, and 13 is a power cord. The temperature variable setting means 28 is composed of the variable resistor 9 and the heater piece 12. When the switch 8 is switched from off to cold air, the air is sucked in from the suction port 2 and the discharge port 3
Blown out from. When the switch 8 is switched to warm air, power is supplied to the heater 7 to generate heat and turn the air into warm air.

As shown in FIG. 3, the air temperature control device 6 has a bidirectional switch such as SBS in which a heater 7 is connected in series with a phase control element 14 such as a triac, and a gate current is supplied to the gate of the phase control element 14. One end of the element 15 is connected, and the other end of the bidirectional switch element 15 is connected to the connection side of the temperature sensor unit 10 and the capacitor 16 in which the positive temperature characteristic thermistor is an example. In addition, a heater piece arranged near the temperature sensor unit 10
A series circuit of 12 and the variable resistor 9 is connected in parallel to the phase control element 14. 17 is a power source, 18 and 19 are diodes, and 20 is a resistor. In the motor 5, 21 is a diode bridge, 22 is a voltage dividing resistor, 23 to 25 are noise prevention coils,
26 and 27 are also capacitors.

The air temperature stabilizing operation of the air temperature control device 6 is such that, for example, when the air temperature rises due to an outside factor such as an ambient temperature or a decrease in air volume, the temperature of the temperature sensor unit 10 rises. The resistance value of 10 increases, the conduction angle of the phase control element 14 decreases, the temperature of the heater 7 decreases, and the air temperature decreases. When the air temperature decreases, the conduction angle of the phase control element 14 increases, the temperature of the heater 7 increases, and the temperature sensor section increases.
The temperature of 10 rises, and the air temperature is kept constant. The same is true when the wind temperature drops. Next, when setting the air temperature, the variable resistor 9 is operated. For example, when setting the air temperature low, the heater resistor is operated by operating the variable resistor 9.
Power of 12 is increased → Air temperature in the vicinity is increased → Temperature of temperature sensor unit 10 is increased → Resistance value of temperature sensor unit 10 is increased → Conduction angle of phase control element 14 is reduced → Temperature of heater 7 is increased It goes down → the wind temperature goes down. The same applies when the air temperature is set high. As described above, by heating the temperature sensor unit 10 with the heater piece 9, a temperature difference can be created between the temperature of the wind by the heater 7 and the temperature variable setting means 28 can set a wide range of temperature. . Moreover, the above-described effects can be realized with a simple circuit having a small number of parts.

An embodiment of the second invention is shown in FIGS. 4 to 6. In this embodiment, the temperature variable setting means 28 comprises a wind tunnel 29 penetrating the heater 7 and a shutter 30 for adjusting the opening amount of the inlet 29a on the fan 4 side. The outlet 31 of the wind tunnel 29 is located on the windward side in the vicinity of the temperature sensor unit 10, and the operation unit 32 of the shutter 30 projects from the main body 1. Other configurations are first
It is similar to the embodiment of.

In the wind temperature setting operation of this embodiment, for example, when raising the set temperature, the operation section 32 is operated in a direction to increase the opening amount of the inlet 29a of the wind tunnel 29. Then, the volume of air passing through the wind tunnel 29 increases → the temperature sensor unit 10 is cooled and its temperature decreases →
The resistance value of the temperature sensor unit 10 decreases, the conduction angle of the phase control element 14 increases, the temperature of the heater 7 increases, and the air temperature increases. When lowering the set temperature, the operation section 32 is operated in the opposite direction. By applying cooling air to the temperature sensor unit 10 in this manner, a difference can be created between the temperature of the temperature sensor unit 10 and the temperature of the air blown from the discharge port 3, so that a wide range of temperature settings can be made. The air temperature stabilizing operation is the same as in the first embodiment.

An embodiment of the third invention is shown in FIGS. This embodiment is suitable for a hair dryer or the like that adjusts the air volume by controlling the energization amount of the motor 5. The temperature variable setting means 28 is used for the heater piece 12, the variable resistor 9, the voltage dividing resistor 22 of the motor 5 and the switch. The motor rotation speed setting means 33 is used as an example. The heater piece 12 and the voltage dividing resistor 22 are disposed on the windward side in the vicinity of the temperature sensor unit 10, the variable resistor 9 controls the electric power of the heater piece 12, and the motor rotation speed setting means 33 controls the resistance value of the voltage dividing resistor 22. Variably set. The voltage dividing resistor 22 is wound around the heater substrate 11 of the heater 7 together with the heater 7. Others are the same as those in the first embodiment.

In this embodiment, the temperature sensor unit 10 detects the air temperature of the air heated by the heater piece 12 and the voltage dividing resistor 22. Therefore, even if the rotation speed of the motor changes and the air volume changes due to the operation of the motor rotation speed setting means 33, the heat generation amount of the voltage dividing resistor 22 changes at the same time, so that the air temperature can be stabilized. That is, if the voltage dividing resistor 22 is increased to reduce the amount of electricity supplied to the motor, the air volume greatly decreases. Therefore, when only the air temperature by the heater piece 12 is detected by the temperature sensor unit 10 as in the first embodiment, the temperature is reduced. When the air volume decreases, the air temperature rises excessively and the temperature of the air blown out from the discharge port 3 changes, that is, the air temperature changes with respect to the air volume change. However, in this embodiment, the amount of heat generated by the voltage dividing resistor 22 also decreases at the same time as the amount of air decreases, so the temperature received by the temperature sensor unit 10 decreases and the air temperature can be kept constant. The air temperature setting operation by the variable resistor 9 is the same as that of the first embodiment.

〔The invention's effect〕

According to the configuration of the first invention, the air temperature is stabilized by the temperature sensor unit and the phase control element, the temperature sensor unit detects the air temperature heated by the heater piece in the vicinity thereof, and the heater piece is variable. Since it is controlled by the resistor, the temperature of the air heated by the heater can be varied over a wide range.

According to the configuration of the second invention, the temperature sensor unit and the phase control element can stabilize the air temperature at the set temperature, and
By adjusting the opening of the wind tunnel with a shutter,
Since the cold air supplied to the temperature sensor unit can be controlled, the temperature control by the heater can be performed over a wide range.

According to the configuration of the third invention, the temperature sensor unit and the phase control element can stabilize the air temperature at the set temperature, and
The temperature can be controlled over a wide range by the variable resistor, and when the air volume changes due to the operation of the heater rotation speed setting means, the heat generation amount of the voltage dividing resistor also changes and the temperature detected by the temperature sensor unit changes, so the air volume changes. Can also stabilize the wind temperature.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a state in which a main body of a hair dryer to which an embodiment of the first invention is applied is divided, FIG. 2 is a perspective view showing a temperature sensor portion, and FIG. 3 is an air temperature control device. FIG. 4 is a partial cross-sectional side view of the hair dryer body to which the embodiment of the second invention is applied in a divided state, FIG. 5 is a perspective view showing a temperature sensor portion, and FIG. FIG. 7 is a circuit diagram of the air temperature control device, FIG. 7 is a partial cross-sectional side view of a hair dryer body to which an embodiment of the third invention is applied, and FIG. 8 is a perspective view showing a temperature sensor section. FIG. 9 is a circuit diagram of the air temperature control device, and FIG. 10 is a circuit diagram of a conventional example. 4 ... Fan, 5 ... Motor, 6 ... Air temperature control device, 7
...... Heater, 9 …… Variable resistor, 10 …… Temperature sensor part,
12 …… Heater piece, 14 …… Phase control element, 22 …… Voltage resistance, 28 …… Temperature variable setting means, 29 …… Wind tunnel, 30 …… Shutter, 33 …… Motor speed setting means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-29104 (JP, A) JP-A-59-156309 (JP, A) Practical application Sho-60-24205 (JP, U)

Claims (3)

[Claims] 1. A motor for driving a fan, a heater for heating wind blown by the fan, a phase control element for phase controlling the heater, and a phase control element for detecting the air temperature. The temperature sensor section for keeping the air temperature constant by means of the temperature sensor section, and the heater piece arranged in the vicinity of the temperature sensor section and the variable resistor for controlling the energization amount of the heater piece are provided to detect the temperature sensor section. An air temperature control device comprising: a temperature variable setting means for variably setting a temperature. 2. A motor for driving a fan, a heater for heating wind blown by the fan, a phase control element for phase controlling the heater, and a phase control element for detecting the air temperature. A wind having a temperature sensor section for keeping the wind temperature constant by means of the temperature sensor, and a temperature variable setting means having a wind tunnel for guiding the cool air from the fan to the temperature sensor section and having a shutter for adjusting the opening amount of the wind tunnel. Temperature control device. 3. A motor for driving a fan, a heater for heating wind blown by the fan, a phase control element for phase controlling the heater, and a phase control element for detecting the air temperature. And a variable resistor for controlling the energization amount of the heater piece, which has a partial resistance of the motor and a heater piece arranged in the vicinity of the temperature sensor section. An air temperature control device further comprising: a temperature variable setting means having a motor rotation speed setting means for variably setting a rotation speed by controlling an energization amount of the motor.