Self-adaptive control circuit for voltage of heating wire and blower device

Abstract

The utility model relates to a heating wire voltage self-adaptive control circuit and a blower device. The heating wire voltage self-adaptive control circuit comprises a heating wire module, a main control module, a voltage control module, a control interlocking protection module, a signal control protection module and a voltage detection module. The main control module is electrically connected with the voltage control module, the control interlocking protection module, the signal control protection module and the voltage detection module. The control interlocking protection module and the signal control protection module are electrically connected with the voltage control module. The voltage control module is also electrically connected with the heating wire module; according to the utility model, the current direction of the heating wire can be switched under the voltage of 100-120VAC and 220-240VAC, so that the power of the heating wire in the input range of the two voltages is the same, and the use of the heating wire is effectively prevented from being limited and influenced by different voltages.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, and more specifically to a heating wire voltage adaptive control circuit and a hair dryer device. Background Art

[0002] Hair dryer products or hair dryer finished products are generally produced by heating wire and high-speed fan. In the prior art, hair dryer products or hair dryer finished products are divided into 100-120VAC voltage represented by US standard products and 220-240VAC represented by European standard / CCC according to voltage, and products with different voltages cannot be used universally under voltages in other countries. For example, products of European standard / CCC national standard are 220-240VAC voltage, and products of US standard and Japanese standard are 100-120VAC products. Hair dryers of these two voltages cannot be used universally. This is even more true for the heating wire inside the hair dryer. For example, if the normal power of the heating wire is 1000W under 100-120VAC, if it is directly at 220-240VAC voltage, the power will reach 4000W, which will instantly damage the product and cause risks such as fire. Therefore, because the use of heating wire is limited and affected by different voltages, when facing different input voltage conditions, the hair dryer does not have universality of use and is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heating wire voltage adaptive control circuit and a hair dryer device in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] On the one hand, the utility model provides a heating wire voltage adaptive control circuit, including a heating wire module, a main control module, a voltage control module, a control interlock protection module, a signal control protection module and a voltage detection module; the main control module is electrically connected to the voltage control module, the control interlock protection module, the signal control protection module and the voltage detection module respectively; the control interlock protection module and the signal control protection module are also electrically connected to the voltage control module respectively; the voltage control module is also electrically connected to the heating wire module.

[0006] In some embodiments, the heating wire module includes a first heating wire and a second heating wire; the first heating wire is electrically connected to the second heating wire, and the first heating wire and the second heating wire are also electrically connected to a voltage control module respectively.

[0007] In some embodiments, the voltage control module includes a first thyristor control unit, a second thyristor control unit and a third thyristor control unit; the first thyristor control unit and the third thyristor control unit are electrically connected to the first end of the first heating wire, respectively; the second thyristor control unit is electrically connected to the second end of the first heating wire and the first end of the second heating wire, respectively; the third thyristor control unit is also electrically connected to the second end of the second heating wire; the second end of the first heating wire is also electrically connected to the first end of the second heating wire.

[0008] In some embodiments, the first thyristor control unit includes a first bidirectional thyristor, a first optocoupler isolator, a first resistor, a second resistor and a third resistor; the first end of the first bidirectional thyristor is electrically connected to the first end of the first resistor, the first end of the first heating wire and the third thyristor control unit respectively; the second end of the first bidirectional thyristor is electrically connected to the second end of the first resistor and the first end of the second resistor respectively, and the second end of the second resistor is electrically connected to the first end of the first optocoupler isolator; the third end of the first bidirectional thyristor is electrically connected to the second end of the first optocoupler isolator, and the third end of the first bidirectional thyristor and the second end of the first optocoupler isolator are also electrically connected to the live wire end; the third end of the first optocoupler isolator is electrically connected to the first end of the third resistor, and the second end of the third resistor is electrically connected to the signal control protection module; the fourth end of the first optocoupler isolator is electrically connected to the main control module.

[0009] In some embodiments, the second thyristor control unit includes a second bidirectional thyristor, a second optocoupler isolator, a fourth resistor, a fifth resistor and a sixth resistor; the first end of the second bidirectional thyristor is electrically connected to the first end of the fourth resistor, the second end of the first heating wire and the first end of the second heating wire respectively; the second end of the second bidirectional thyristor is electrically connected to the second end of the fourth resistor and the first end of the fifth resistor respectively, and the second end of the fifth resistor is electrically connected to the first end of the second optocoupler isolator; the third end of the second bidirectional thyristor is electrically connected to the second end of the second optocoupler isolator, and the third end of the second bidirectional thyristor and the second end of the second optocoupler isolator are also electrically connected to the live wire end; the third end of the second optocoupler isolator is electrically connected to the first end of the sixth resistor, and the second end of the sixth resistor is electrically connected to the signal control protection module; the fourth end of the second optocoupler isolator is electrically connected to the control interlock protection module.

[0010] In some embodiments, the third thyristor control unit includes a third bidirectional thyristor, a third optocoupler isolator, a seventh resistor, an eighth resistor and a ninth resistor; the first end of the third bidirectional thyristor is electrically connected to the first end of the seventh resistor, the first end of the first heating wire, the first end of the first resistor and the first end of the first bidirectional thyristor respectively; the second end of the third bidirectional thyristor is electrically connected to the first end of the eighth resistor and the first end of the third optocoupler isolator respectively; the third end of the third bidirectional thyristor is electrically connected to the second end of the eighth resistor and the second end of the second heating wire respectively; the second end of the seventh resistor is electrically connected to the second end of the third optocoupler isolator; the third end of the third optocoupler is electrically connected to the first end of the ninth resistor, and the second end of the ninth resistor is electrically connected to the signal control protection module; the fourth end of the third optocoupler is electrically connected to the control interlock protection module.

[0011] In some embodiments, the signal control protection module includes a tenth resistor, an eleventh resistor and a first transistor; the base of the first transistor is electrically connected to the first end of the tenth resistor and the first end of the eleventh resistor, respectively, and the second end of the tenth resistor is electrically connected to the main control module; the emitter of the first transistor is electrically connected to the second end of the eleventh resistor and connected to the power supply end; the collector of the first transistor is electrically connected to the second end of the third resistor, the second end of the sixth resistor and the second end of the ninth resistor, respectively.

[0012] In some embodiments, the control interlock protection module includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a second transistor; the base of the second transistor is electrically connected to the first end of the thirteenth resistor and the first end of the fourteenth resistor, respectively, and the second end of the thirteenth resistor is electrically connected to the main control module; the emitter of the second transistor and the second end of the fourteenth resistor are both grounded; the collector of the second transistor is electrically connected to the fourth end of the second optocoupler isolator, the fourth end of the third optocoupler isolator and the first end of the fifteenth resistor, respectively, and the second end of the fifteenth resistor is electrically connected to the power supply end.

[0013] In some embodiments, the heating wire module further includes a fuse unit electrically connected to the second heating wire and the voltage control module respectively, and the fuse unit is also electrically connected to the neutral line terminal.

[0014] On the other hand, the utility model further provides a hair dryer device, comprising any one of the heating wire voltage adaptive control circuits described above.

[0015] The beneficial effect of the present invention is that, different from the prior art, the heating wire voltage adaptive control circuit of the present invention can effectively realize the switching of the heating wire current direction under the voltage of 100-120VAC and the voltage of 220-240VAC through the voltage control module, so that the power of the heating wires in the two voltage input ranges is the same, the control interlock protection module is used to ensure the locking state of the voltage control module in different switching states, and the signal control protection module is used to ensure that the locking signal is consistent with the locking state, which effectively avoids the use of the heating wire being restricted and affected by different voltages, and is easy to be used in a hair dryer device to improve the versatility of the hair dryer device when facing different input voltage conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a principle block diagram of the heating wire voltage adaptive control circuit in the embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the circuit structure of the heating wire module in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the circuit structure of the voltage control module in the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the circuit structure of the signal control protection module in the embodiment of the utility model;

[0020] Figure 5 It is a schematic diagram of the circuit structure of the control interlock protection module in the embodiment of the utility model;

[0021] Figure 6 Schematic diagram of the circuit structure of the voltage detection module in the embodiment of the utility model;

[0022] The marked names and serial numbers in the figure are: heating wire module-1; main control module-2; voltage control module-3; control interlock protection module-4; signal control protection module-5; voltage detection module-6; fuse unit-11; first thyristor control unit-31; second thyristor control unit-32; third thyristor control unit-33; input voltage detection unit-61; output voltage detection unit-62. DETAILED DESCRIPTION

[0023] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the utility model and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0026] Moreover, the terms "up, down, front, back, left, right, upper end, lower end" etc. indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0028] The utility model is implemented as follows Figure 1 As shown in the figure, a heating wire voltage adaptive control circuit includes a heating wire module 1, a main control module 2, a voltage control module 3, a control interlock protection module 4, a signal control protection module 5 and a voltage detection module 6; the main control module 2 is electrically connected to the voltage control module 3, the control interlock protection module 4, the signal control protection module 5 and the voltage detection module 6 respectively; the control interlock protection module 4 and the signal control protection module 5 are also electrically connected to the voltage control module 3 respectively; the voltage control module 3 is also electrically connected to the heating wire module 1.

[0029] Specifically, in this embodiment, the main control module 2 is set to MCU (Microcontroller Unit). In another embodiment, the main control module 2 can also be set to DSP (Digital Signal Process), FPGA (Field Programmable Gate Array), SOC (System On Chip), ARM (Acorn RISC Machine), etc., which are not specifically limited here.

[0030] See also Figure 2 The heating wire module 1 includes a first heating wire R01 and a second heating wire R02; the first heating wire R01 is electrically connected to the second heating wire R02, and the first heating wire R01 and the second heating wire R02 are also electrically connected to the voltage control module 3. Further, the heating wire module 1 also includes a fuse unit 11 electrically connected to the second heating wire R02 and the voltage control module 3, respectively, and the fuse unit 11 is also electrically connected to the neutral terminal N1. The fuse unit 11 includes a temperature fuse F1 and a thermostat TCO.

[0031] Specifically, in this embodiment, the voltage control module 3 includes a first thyristor control unit 31, a second thyristor control unit 32 and a third thyristor control unit 33; the first thyristor control unit 31 and the third thyristor control unit 33 are electrically connected to the first end of the first heating wire R01 respectively; the second thyristor control unit 32 is electrically connected to the second end of the first heating wire R01 and the first end of the second heating wire R02 respectively; the third thyristor control unit 33 is also electrically connected to the second end of the second heating wire R02; the second end of the first heating wire R01 is also electrically connected to the first end of the second heating wire R02.

[0032] See also Figure 3The first thyristor control unit 31 includes a first bidirectional thyristor T1, a first optocoupler isolator OC1, a first resistor R4, a second resistor R3 and a third resistor R5; the first end of the first bidirectional thyristor T1 is electrically connected to the first end of the first resistor R4, the first end of the first heating wire R01 and the third thyristor control unit 33 respectively; the second end of the first bidirectional thyristor T1 is electrically connected to the second end of the first resistor R4 and the first end of the second resistor R3 respectively, and the second end of the second resistor R3 is electrically connected to the first end of the first optocoupler isolator OC1; the third end of the first bidirectional thyristor T1 is electrically connected to the second end of the first optocoupler isolator OC1, and the third end of the first bidirectional thyristor T1 and the second end of the first optocoupler isolator OC1 are also electrically connected to the live wire terminal L1; the third end of the first optocoupler isolator OC1 is electrically connected to the first end of the third resistor R5, and the second end of the third resistor R5 is electrically connected to the signal control protection module 5; the fourth end of the first optocoupler isolator OC1 is electrically connected to the main control module 2.

[0033] See also Figure 3 The second thyristor control unit 32 includes a second bidirectional thyristor T2, a second optocoupler isolator OC2, a fourth resistor R10, a fifth resistor R9 and a sixth resistor R8; the first end of the second bidirectional thyristor T2 is electrically connected to the first end of the fourth resistor R10, the second end of the first heating wire R01 and the first end of the second heating wire R02 respectively; the second end of the second bidirectional thyristor T2 is electrically connected to the second end of the fourth resistor R10 and the first end of the fifth resistor R9 respectively, and the second end of the fifth resistor R9 is electrically connected to the first end of the second optocoupler isolator OC2; the third end of the second bidirectional thyristor T2 is electrically connected to the second end of the second optocoupler isolator OC2, and the third end of the second bidirectional thyristor T2 and the second end of the second optocoupler isolator OC2 are also electrically connected to the live wire terminal L1; the third end of the second optocoupler isolator OC2 is electrically connected to the first end of the sixth resistor R8, and the second end of the sixth resistor R8 is electrically connected to the signal control protection module 5; the fourth end of the second optocoupler isolator OC2 is electrically connected to the control interlock protection module 4.

[0034] See also Figure 3The third thyristor control unit 33 includes a third bidirectional thyristor T3, a third optocoupler isolator OC3, a seventh resistor R6, an eighth resistor R11 and a ninth resistor R7; the first end of the third bidirectional thyristor T3 is electrically connected to the first end of the seventh resistor R6, the first end of the first heating wire R01, the first end of the first resistor R4 and the first end of the first bidirectional thyristor T1 respectively; the second end of the third bidirectional thyristor T3 is electrically connected to the first end of the eighth resistor R11 and the first end of the third optocoupler isolator OC3 respectively; the third end of the third bidirectional thyristor T3 is electrically connected to the second end of the eighth resistor R11 and the second end of the second heating wire R02 respectively; the second end of the seventh resistor R6 is electrically connected to the second end of the third optocoupler isolator OC3; the third end of the third optocoupler isolator OC3 is electrically connected to the first end of the ninth resistor R7, and the second end of the ninth resistor R7 is electrically connected to the signal control protection module 5; the fourth end of the third optocoupler isolator OC3 is electrically connected to the control interlock protection module 4.

[0035] Here, the working principle in the specific implementation is explained in combination with the circuit layout of the heating wire module 1 and the voltage control module 3:

[0036] When the voltage is 100-120VAC, the first bidirectional thyristor T1 is turned off, the second bidirectional thyristor T2 and the third bidirectional thyristor T3 are turned on, and the current direction of one path is (indicated by the corresponding letter labels): N1-F1-TCO-R02-T2-L1. The current direction of another path is (indicated by the corresponding letter labels): N1-F1-TCO-T3-R01-T2-L1. The first heating wire R01 and the second heating wire R02 are connected in parallel, and the power of these two sets of heating wires is: if calculated at 115VAC: 115^2 / (22 / / 22)=1202W.

[0037] When the voltage is 220-240VAC, the first bidirectional thyristor T1 is turned on, the second bidirectional thyristor T2 and the third bidirectional thyristor T3 are turned off, and the current direction is (indicated by the corresponding letter labels): N1-F1-TCO-R02-R01-T1-L1. The first heating wire R01 and the second heating wire R02 are connected in series, and the final power of these two sets of heating wires is: if calculated at 230VAC: 230^2 / (22+22)=1202W.

[0038] It can be seen from the calculation results that the voltage control module 3 of this embodiment can effectively realize the switching of the current direction of the heating wire under the voltage of 100-120VAC and the voltage of 220-240VAC: when the voltage is 100-120VAC, the first heating wire R01 and the second heating wire R02 are connected in parallel to reduce the resistance of the two groups of heating wires, and the calculation formula is P=U^2 / (R01 / / R02). When the voltage is 220-240VAC, the first heating wire R01 and the second heating wire R02 are connected in series to increase the resistance of the two groups of heating wires, and the calculation formula is P=U^2 / (R01+R02). As a result, the power of the heating wires in the different voltage input ranges of 100-120VAC and 220-240VAC is the same.

[0039] See also Figure 4 The signal control protection module 5 includes a tenth resistor R2, an eleventh resistor R1 and a first transistor Q1; the base of the first transistor Q1 is electrically connected to the first end of the tenth resistor R2 and the first end of the eleventh resistor R1, and the second end of the tenth resistor R2 is electrically connected to the main control module 2; the emitter of the first transistor Q1 is electrically connected to the second end of the eleventh resistor R1 and connected to the +5V power supply terminal; the collector of the first transistor Q1 is electrically connected to the second end of the third resistor R5, the second end of the sixth resistor R8 and the second end of the ninth resistor R7. Among them, the first transistor Q1 is a PNP transistor.

[0040] See also Figure 5 The control interlock protection module 4 includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R12 and a second transistor Q2; the base of the second transistor Q2 is electrically connected to the first end of the thirteenth resistor R13 and the first end of the fourteenth resistor R14, respectively, and the second end of the thirteenth resistor R13 is electrically connected to the main control module 2; the emitter of the second transistor Q2 and the second end of the fourteenth resistor R14 are both grounded; the collector of the second transistor Q2 is electrically connected to the fourth end of the second optical coupler isolator OC2, the fourth end of the third optical coupler isolator OC3 and the first end of the fifteenth resistor R12, respectively, and the second end of the fifteenth resistor R12 is electrically connected to the +5V power supply terminal. Among them, the second transistor Q2 is an NPN transistor.

[0041] Here, the working principle in the specific implementation is explained in combination with the circuit layout of the voltage control module 3, the control interlock protection module 4 and the signal control protection module 5:

[0042] When the H2 signal is 0V, the first optocoupler isolator OC1 sends a signal to turn on the first bidirectional thyristor T1. At the same time, due to the passage of the second transistor Q2, the H1 signal is 5V, so that the second optocoupler isolator OC2 and the third optocoupler isolator OC3 have no current, and the second bidirectional thyristor T2 and the third bidirectional thyristor T3 are turned off. When the H2 signal is 5V, the first optocoupler isolator OC1 sends a signal of no current, so that the first bidirectional thyristor T1 is turned off. At the same time, due to the passage of the second transistor Q2, the H1 signal is 0V, so that the second optocoupler isolator OC2 and the third optocoupler isolator OC3 send a signal, and the second bidirectional thyristor T2 and the third bidirectional thyristor T3 are turned on. In this way, the conduction relationship of the first bidirectional thyristor T1, the second bidirectional thyristor T2 and the third bidirectional thyristor T3 in the circuit can be ensured to be in an interlocked state.

[0043] When the HT-P signal is 0V, the +5V power supply flows through the first transistor Q1 to 5V-T to the first optocoupler isolator OC1, the second optocoupler isolator OC2 and the third optocoupler isolator OC3, so that the first optocoupler isolator OC1, the second optocoupler isolator OC2 and the third optocoupler isolator OC3 can respond to the corresponding H1 / H2 signal. When the HT-P signal is 5V, the first transistor Q1 is cut off. There is no current from +5V to 5V-T, and the first optocoupler isolator OC1, the second optocoupler isolator OC2 and the third optocoupler isolator OC3 no longer respond to the corresponding H1 / H2 signal. This is used to turn off the power supply flowing to the corresponding optocoupler when the interlock signal is wrong, so as to cut off the voltage and current and make the interlock control signal invalid, so that the first bidirectional thyristor T1, the second bidirectional thyristor T2 and the third bidirectional thyristor T3 are all turned off, and finally the function of turning off all the heating wires is realized.

[0044] See also Figure 6 The voltage detection module 6 includes an input voltage detection unit 61 and an output voltage detection unit 62. The input voltage detection unit 61 and the output voltage detection unit 62 are electrically connected to the main control module 1 respectively. Among them, VBUS_IN is the input voltage, which enters the MCU to realize input voltage detection; VBUS is the output voltage, which enters the MCU to realize output voltage detection.

[0045] It should be noted that the circuit structure of the voltage detection module is relatively existing, and what is shown in the drawings of this embodiment is only an example. In actual application, any suitable voltage detection module in the prior art can be referred to to achieve voltage detection, and no specific limitation is made here.

[0046] In another embodiment of the utility model, a hair dryer device is provided, which includes the heating wire voltage adaptive control circuit provided in the above embodiment. For the introduction of the heating wire voltage adaptive control circuit, please refer to the above embodiment, which will not be repeated here.

[0047] It should be understood that ordinary technical workers in the field can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A heating wire voltage adaptive control circuit, characterized in that: It includes a heating wire module, a main control module, a voltage control module, a control interlock protection module, a signal control protection module and a voltage detection module; the main control module is electrically connected to the voltage control module, the control interlock protection module, the signal control protection module and the voltage detection module respectively; the control interlock protection module and the signal control protection module are also electrically connected to the voltage control module respectively; the voltage control module is also electrically connected to the heating wire module.

2. The heating wire voltage adaptive control circuit according to claim 1, characterized in that: The heating wire module includes a first heating wire and a second heating wire; the first heating wire is electrically connected to the second heating wire, and the first heating wire and the second heating wire are also electrically connected to the voltage control module respectively.

3. The heating wire voltage adaptive control circuit according to claim 2, characterized in that: The voltage control module includes a first thyristor control unit, a second thyristor control unit and a third thyristor control unit; the first thyristor control unit and the third thyristor control unit are electrically connected to the first end of the first heating wire respectively; the second thyristor control unit is electrically connected to the second end of the first heating wire and the first end of the second heating wire respectively; the third thyristor control unit is also electrically connected to the second end of the second heating wire; the second end of the first heating wire is also electrically connected to the first end of the second heating wire.

4. The heating wire voltage adaptive control circuit according to claim 3, characterized in that: The first thyristor control unit includes a first bidirectional thyristor, a first optocoupler isolator, a first resistor, a second resistor and a third resistor; the first end of the first bidirectional thyristor is electrically connected to the first end of the first resistor, the first end of the first heating wire and the third thyristor control unit respectively; the second end of the first bidirectional thyristor is electrically connected to the second end of the first resistor and the first end of the second resistor respectively, and the second end of the second resistor is electrically connected to the first end of the first optocoupler isolator; the third end of the first bidirectional thyristor is electrically connected to the second end of the first optocoupler isolator, and the third end of the first bidirectional thyristor and the second end of the first optocoupler isolator are also electrically connected to the live wire end; the third end of the first optocoupler isolator is electrically connected to the first end of the third resistor, and the second end of the third resistor is electrically connected to the signal control protection module; the fourth end of the first optocoupler isolator is electrically connected to the main control module.

5. The heating wire voltage adaptive control circuit according to claim 4, characterized in that: The second thyristor control unit includes a second bidirectional thyristor, a second optocoupler isolator, a fourth resistor, a fifth resistor and a sixth resistor; the first end of the second bidirectional thyristor is electrically connected to the first end of the fourth resistor, the second end of the first heating wire and the first end of the second heating wire respectively; the second end of the second bidirectional thyristor is electrically connected to the second end of the fourth resistor and the first end of the fifth resistor respectively, and the second end of the fifth resistor is electrically connected to the first end of the second optocoupler isolator; the third end of the second bidirectional thyristor is electrically connected to the second end of the second optocoupler isolator, and the third end of the second bidirectional thyristor and the second end of the second optocoupler isolator are also electrically connected to the live wire end; the third end of the second optocoupler isolator is electrically connected to the first end of the sixth resistor, and the second end of the sixth resistor is electrically connected to the signal control protection module; the fourth end of the second optocoupler isolator is electrically connected to the control interlock protection module.

6. The heating wire voltage adaptive control circuit according to claim 5, characterized in that: The third thyristor control unit includes a third bidirectional thyristor, a third optocoupler isolator, a seventh resistor, an eighth resistor and a ninth resistor; the first end of the third bidirectional thyristor is electrically connected to the first end of the seventh resistor, the first end of the first heating wire, the first end of the first resistor and the first end of the first bidirectional thyristor respectively; the second end of the third bidirectional thyristor is electrically connected to the first end of the eighth resistor and the first end of the third optocoupler isolator respectively; the third end of the third bidirectional thyristor is electrically connected to the second end of the eighth resistor and the second end of the second heating wire respectively; the second end of the seventh resistor is electrically connected to the second end of the third optocoupler isolator; the third end of the third optocoupler is electrically connected to the first end of the ninth resistor, and the second end of the ninth resistor is electrically connected to the signal control protection module; the fourth end of the third optocoupler is electrically connected to the control interlock protection module.

7. The heating wire voltage adaptive control circuit according to claim 6, characterized in that: The signal control protection module includes a tenth resistor, an eleventh resistor and a first transistor; the base of the first transistor is electrically connected to the first end of the tenth resistor and the first end of the eleventh resistor, respectively, and the second end of the tenth resistor is electrically connected to the main control module; the emitter of the first transistor is electrically connected to the second end of the eleventh resistor and connected to the power supply end; the collector of the first transistor is electrically connected to the second end of the third resistor, the second end of the sixth resistor and the second end of the ninth resistor, respectively.

8. The heating wire voltage adaptive control circuit according to claim 6, characterized in that: The control interlock protection module includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a second transistor; the base of the second transistor is electrically connected to the first end of the thirteenth resistor and the first end of the fourteenth resistor, respectively, and the second end of the thirteenth resistor is electrically connected to the main control module; the emitter of the second transistor and the second end of the fourteenth resistor are both grounded; the collector of the second transistor is electrically connected to the fourth end of the second optocoupler isolator, the fourth end of the third optocoupler isolator and the first end of the fifteenth resistor, respectively, and the second end of the fifteenth resistor is electrically connected to the power supply end.

9. The heating wire voltage adaptive control circuit according to any one of claims 2 to 8, characterized in that: The heating wire module further includes a fuse unit electrically connected to the second heating wire and the voltage control module respectively, and the fuse unit is also electrically connected to the neutral line terminal.

10. A hair dryer device, characterized in that: It comprises a heating wire voltage adaptive control circuit as described in any one of claims 1-9.

Images