Hair straightening comb

Abstract

The utility model relates to a hair straightening comb which comprises a heating structure and a temperature control circuit. Wherein the heating body is used for heating the heat conduction comb tooth assembly; one or more heating wires are arranged in the heating body, and the heating wires are stacked one by one or horizontally arranged and insulated from one another; in addition, the structure is compact, the size is small, and the production cost is reduced; the sub-control circuit controls the alternating-current mains supply to switch on and off the heating wire and controls the working gear of the heating wire, and the main control circuit controls the working gear and the switch-on and switch-off of the heating wire according to the voltage of the alternating-current mains supply and carries out pulse width modulation temperature adjustment on the heating wire according to the working current of the heating wire; the pulse width modulation temperature adjustment is carried out on the heating wire by detecting the working current of the heating wire, the temperature control precision is high, the cost is low, the working gear and the power-on and power-off of the heating wire are controlled according to the voltage of the alternating current mains supply, and the device is suitable for being used by alternating current mains supplies with different voltages and is wide in applicability.

Description

Technical Field

[0001] This utility model relates to the field of heating structure and circuit technology of hair straighteners, and more specifically, to a hair straightener. Background Technology

[0002] The heating structure of most existing hair straighteners uses semiconductor heating elements to heat the comb teeth. When rapid heating of the comb teeth is required, more semiconductor heating elements need to be added, which prevents the hair straightener from being made smaller and thus fails to meet people's needs.

[0003] Furthermore, most hair straighteners use self-resetting thermal fuses and switches to control temperature, which results in low temperature control accuracy and poor safety, and can no longer meet people's needs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a hair straightener that is simple in structure, simple in circuitry, small in size and low in cost, in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] Constructing a hair straightening comb, comprising:

[0007] main body;

[0008] A heating structure is provided on the main body; the heating structure includes: one or more heating elements and a heat-conducting comb assembly, wherein the heating elements heat the heat-conducting comb assembly; one or more heating wires are provided in the heating body, and the plurality of heating wires are stacked one by one or arranged horizontally and insulated from each other;

[0009] And a temperature control circuit, located in the main body;

[0010] The temperature control circuit includes: a power supply circuit, a main control circuit, a sub-control circuit, and a current detection circuit; the power supply circuit inputs AC mains power, rectifies and reduces the voltage to continuously output 5V DC power to provide power to the main control circuit; the sub-control circuit controls the AC mains power to switch the heating wire on and off and controls the working level of the heating wire; the current detection circuit detects the working current of the heating wire.

[0011] The power supply circuit is connected to the main control circuit, and both the sub-control circuit and the current detection circuit are connected to the main control circuit; the sub-control circuit is controlled by the main control circuit.

[0012] The main control circuit controls the working level and power on / off of the heating wire according to the voltage of the AC mains power, and performs pulse width modulation temperature adjustment on the heating wire according to the working current of the heating wire;

[0013] The heating wire has two working settings: a first working setting and a second working setting.

[0014] The hair straightener of this utility model includes a heat-conducting comb tooth assembly comprising heat-conducting teeth, an anti-scalding cloth, and a heat-insulating sleeve. The heat-conducting teeth are thermally connected to the heating element. The sides of the heat-conducting teeth have heat-conducting surfaces. The anti-scalding cloth covers at least the heat-conducting surfaces. The sides of the heat-insulating sleeve have clearance openings corresponding to the heat-conducting surfaces, so that the portion of the anti-scalding cloth covering the heat-conducting surfaces is exposed.

[0015] The hair straightener of this invention has heat-conducting surfaces on both sides of the heat-conducting teeth, and the heat-insulating sleeve has a relief opening for each heat-conducting surface.

[0016] The hair straightener of this utility model includes a main body comprising a gripping part and a mounting part located at one end of the gripping part, wherein the heating element and the heat-conducting comb tooth assembly are both disposed in the mounting part;

[0017] The hair straightener also includes floating comb teeth and an elastic element. The mounting part has an mounting space. The floating comb teeth are movably mounted in the mounting space along the length direction of the heat-conducting teeth and extend between the multiple heat-conducting teeth. The ends of the floating comb teeth protrude from the ends of the heat insulation sleeve. The elastic element abuts between the floating comb teeth and the mounting part.

[0018] In the hair straightening comb of this utility model, a thermistor or a self-resetting thermal fuse is disposed in the heating element. The thermistor detects the temperature of the heating element, and the self-resetting thermal fuse also detects the temperature of the heating element and provides over-temperature protection for the heating element.

[0019] The thermistor is connected to the main control circuit, and the main control circuit adjusts the temperature of the heating wire by pulse width modulation according to the temperature of the heating element.

[0020] In the hair straightening comb of this utility model, a main control circuit is connected in series between the live wire of the AC mains power and the sub-control circuit, and a self-resetting thermal fuse is connected in series between the live wire of the AC mains power and the main control circuit.

[0021] The heating wire and the current detection circuit are connected in series in sequence between the sub-control circuit and the neutral wire of the AC mains power supply.

[0022] The main control circuit is controlled by the sub-control circuit, and both the main control circuit and the sub-control circuit control the on / off state of the AC mains live wire.

[0023] The hair straightener of this invention includes a voltage detection circuit and a zero-point detection circuit, both of which are connected to AC mains power and are connected to the main control circuit. The voltage detection circuit detects the voltage of the AC mains power, and the zero-point detection circuit detects whether the AC mains power is at zero.

[0024] When the AC mains voltage is within the range of 110V AC mains power supply voltage, the main control circuit controls the heating wire to work at the first working level through the sub-control circuit; conversely, when the AC mains voltage is within the range of 220V AC mains power supply voltage, the main control circuit controls the heating wire to work at the second working level through the sub-control circuit.

[0025] When the AC mains power is at zero, the main control circuit controls the sub-control circuit or the main control circuit to stop working; both the sub-control circuit and the main control circuit use a first thyristor to control the on / off state of the AC mains live wire.

[0026] The hair straightener of this utility model includes a power supply circuit comprising: a switching power supply chip, a first diode, a second diode, a third diode, a first capacitor, a first resistor, and an inductor.

[0027] The DRAIN terminal of the switching power supply chip is connected to the negative terminal of the first diode and the second capacitor. The positive terminal of the first diode is connected to the live wire of the AC mains power, and the other end of the second capacitor is connected to the neutral wire of the AC mains power.

[0028] The CS terminal of the switching power supply chip is connected to the first resistor, the other end of the first resistor is connected to the inductor, the first capacitor and the negative terminal of the third diode, the other end of the inductor is connected to the neutral line of the AC mains, and the other end of the first capacitor is connected to the VDD terminal of the switching power supply chip.

[0029] The VDD terminal of the switching power supply chip is connected to the negative terminal of the second diode, and the positive terminal of the second diode is connected to the neutral wire of the AC mains power.

[0030] A third capacitor is connected in parallel between the neutral wire of the AC mains power and the positive terminal of the third diode. The neutral wire of the AC mains power is the positive output terminal of the 5V DC power, and the positive terminal of the third diode is the negative output terminal of the 5V DC power.

[0031] The hair straightener described in this utility model uses a switching power supply chip of model number KP3111.

[0032] The hair straightener of this invention includes a main control circuit connected to a second thyristor, a gate of which is connected to a third resistor, the other end of which is connected to the main control circuit; the first main electrode of the second thyristor is connected to the neutral wire of the negative ion generator and the second main electrode is connected to the neutral wire of the AC mains power supply; the live wire of the negative ion generator is connected to the live wire of the AC mains power supply.

[0033] The beneficial effects of this utility model are as follows: the heating element heats the heat-conducting comb assembly; the heating element contains one or more heating wires, which are stacked one by one or arranged horizontally and insulated from each other; this achieves rapid heating of the heat-conducting comb assembly, and the structure is compact and small in size, reducing production costs; the power supply circuit rectifies and reduces the voltage of AC mains power to continuously output 5V DC power to provide power to the main control circuit, the sub-control circuit controls the AC mains power to power the heating wire and controls the working level of the heating wire, the main control circuit controls the working level and power on / off of the heating wire according to the AC mains voltage, and performs pulse width modulation temperature adjustment on the heating wire according to the working current of the heating wire; it realizes pulse width modulation temperature adjustment of the heating wire by detecting the working current of the heating wire, with high temperature control accuracy and low cost, and realizes the control of the working level and power on / off of the heating wire according to the AC mains voltage, adapting to the use of AC mains power supply of different voltages, and has wide applicability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional view of a straightening comb according to a preferred embodiment of the present invention;

[0036] Figure 2 This is a preferred embodiment of the present invention. Figure 1 Exploded view of a medium-length straight hair comb;

[0037] Figure 3 This is a preferred embodiment of the present invention. Figure 2 Enlarged view of point A in the middle;

[0038] Figure 4 This is a preferred embodiment of the present invention. Figure 1 Top view of a medium-length straight hair comb;

[0039] Figure 5 This is a preferred embodiment of the present invention. Figure 4 Sectional view at point XX;

[0040] Figure 6 This is a preferred embodiment of the present invention. Figure 5 Enlarged view of point B in the middle;

[0041] Figure 7 This is a schematic diagram of a cross-sectional view at point YY of a preferred embodiment of the present invention, rotated 90° clockwise.

[0042] Figure 8 An exploded view of the heating wires in the heating element of the hair straightener according to a preferred embodiment of this utility model is shown, with the wires stacked one on top of the other.

[0043] Figure 9 This is an exploded view of the heating element of the hair straightener of the preferred embodiment of the present invention, showing the heating wires arranged horizontally.

[0044] Figure 10 This is a circuit diagram of the power supply circuit, sub-control circuit, main control circuit, current detection circuit, voltage detection circuit, and zero-point detection circuit of a hair straightener according to a preferred embodiment of the present invention.

[0045] Figure 11 This is a circuit diagram of the thermistor of the hair straightener according to a preferred embodiment of the present invention;

[0046] Figure 12 This is a circuit diagram of the second thyristor of the hair straightener according to a preferred embodiment of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0048] The hair straightener of the preferred embodiment of this utility model is as follows: Figure 1 As shown, see also Figures 2 to 12 ;include:

[0049] Main body 10;

[0050] Heating structure 110 is provided on the main body 10; heating structure 110 includes: one or more heating elements 31 and heat-conducting comb assembly 20, the heating elements 31 heat the heat-conducting comb assembly 20; one or more heating wires M2 are provided in the heating elements 31, the multiple heating wires M2 are stacked one by one or arranged horizontally and are insulated from each other; and temperature control circuit is provided on the main body 10.

[0051] The temperature control circuit includes: a power supply circuit 210, a main control circuit (not shown in the figure), a sub-control circuit 220, and a current detection circuit 230; the power supply circuit 210 rectifies and reduces the AC mains power to continuously output 5V DC power to provide power to the main control circuit; the sub-control circuit 220 controls the AC mains power to switch the heating wire M2 on and off and controls the working level of the heating wire M2; the current detection circuit 230 detects the working current of the heating wire M2.

[0052] The power supply circuit 210 is connected to the main control circuit, and the sub-control circuit 220 and the current detection circuit 230 are both connected to the main control circuit; the sub-control circuit 220 is controlled by the main control circuit.

[0053] The main control circuit controls the working position and power on / off of the heating wire M2 according to the AC mains voltage, and performs pulse width modulation to adjust the temperature of the heating wire M2 according to the working current of the heating wire M2.

[0054] The heating wire M2 has two working settings: a first working setting and a second working setting.

[0055] The heating element 31 heats the heat-conducting comb tooth 1121 assembly 112. The heating element 31 contains one or more heating wires M2, which are stacked one on top of another or arranged horizontally and are insulated from each other. This allows for rapid heating of the heat-conducting comb tooth 1121 assembly 112, and results in a compact structure and small size, reducing production costs. The power supply circuit 210 receives AC mains power, rectifies and reduces the voltage to continuously output 5V DC power to provide power to the main control circuit. The sub-control circuit 220 controls the switching of AC mains power on and off the heating wires M2. The main control circuit controls the operating level of the heating wire M2 based on the AC mains voltage, and performs pulse width modulation (PWM) temperature regulation on the heating wire M2 based on its operating current. This achieves high temperature control accuracy and low cost by detecting the operating current of the heating wire M2, and is compatible with AC mains power supplies of different voltages, making it widely applicable.

[0056] like Figures 1 to 6 As shown, the heat-conducting comb assembly 20 includes heat-conducting teeth 21, anti-scalding cloth 22, and heat insulation sleeve 23. The heat-conducting teeth 21 are thermally connected to the heating element 30. The side of the heat-conducting teeth 21 has a heat-conducting surface 211. The anti-scalding cloth 22 covers at least the heat-conducting surface 211. The side of the heat insulation sleeve 23 has a relief opening 231. The relief opening 231 is provided corresponding to the heat-conducting surface 211 so that the part of the anti-scalding cloth 22 covering the heat-conducting surface 211 is exposed.

[0057] like Figures 1 to 6As shown, each of the opposite sides of the heat-conducting teeth 21 has a heat-conducting surface 211, and the heat insulation sleeve 23 has a relief opening 231 corresponding to each heat-conducting surface 211. This increases the perming area and improves perming efficiency. Optionally, the anti-scalding cloth 22 is fitted over the heat-conducting teeth 21 and covers both heat-conducting surfaces 211, so that only one anti-scalding cloth 22 needs to be installed on each heat-conducting tooth 21, which facilitates assembly.

[0058] like Figures 1 to 6 As shown, the main body 10 includes a grip portion 12 and a mounting portion 11 located at one end of the grip portion 12. The heating element 30 and the heat-conducting comb assembly 20 are both located in the mounting portion 11. This structure is simple and easy for users to hold and use.

[0059] The straightening comb also includes floating comb teeth 41 and an elastic element 42. The mounting part 11 has a mounting space 111. The floating comb teeth 41 are movably mounted in the mounting space 111 along the length of the heat-conducting teeth 21 and extend between the multiple heat-conducting teeth 21. The ends of the floating comb teeth 41 protrude beyond the ends of the heat-insulating sleeve 23. The elastic element 42 abuts against the floating comb teeth 41 and the mounting part 11. That is, in the free state, the ends of the floating comb teeth 41 protrude beyond the ends of the heat-insulating sleeve 23. When the ends of the floating comb teeth 41 abut against the scalp, they can overcome the elastic force of the elastic element 42 and move into the mounting space 111. Thus, during combing, the floating comb teeth 41 can exert a certain pressure on the scalp, providing a better scalp massage effect. The elastic element 42 can be a spring, a sheet, or an elastomer (such as rubber).

[0060] like Figures 8 to 12 As shown, a thermistor NTC or a self-resetting thermal fuse TF1 is installed inside the heating element 31. The thermistor NTC detects the temperature of the heating element 31, and the self-resetting thermal fuse also detects the temperature of the heating element 31 and provides over-temperature protection for the heating element M2, thus providing secondary protection.

[0061] The thermistor NTC is connected to the main control circuit. The main control circuit adjusts the temperature of the heating wire M2 by pulse width modulation according to the temperature of the heating element 31, and has redundant temperature adjustment and over-temperature protection.

[0062] like Figures 8 to 12 As shown, a main control circuit 240 is connected in series between the live wire of the AC mains power and the sub-control circuit 220, and a self-resetting thermal fuse TF1 is connected in series between the live wire of the AC mains power and the main control circuit 240.

[0063] The heating wire M2 and the current detection circuit 230 are connected in series in sequence between the sub-control circuit 220 and the neutral wire of the AC mains power supply.

[0064] The main control circuit 240 is controlled by the main control circuit. Both the main control circuit 240 and the sub-control circuit 220 control the on / off of the AC mains live wire. The main control circuit 240 is used to provide secondary power-off protection for the heating wire M2.

[0065] like Figures 8 to 12 As shown, both the voltage detection circuit 250 and the zero-point detection circuit 260 are connected to the AC mains power, and both are connected to the main control circuit. The voltage detection circuit 250 detects the voltage of the AC mains power, and the zero-point detection circuit 260 detects whether the AC mains power is at zero.

[0066] When the AC mains voltage is within the range of 110V AC mains supply voltage, the main control circuit controls the heating wire M2 to work in the first working position through the sub-control circuit 220. Conversely, when the AC mains voltage is within the range of 220V AC mains supply voltage, the main control circuit controls the heating wire M2 to work in the second working position through the sub-control circuit 220.

[0067] When the AC mains power is at zero, the main control circuit controls the sub-control circuit 220 or the main control circuit 240 to stop working; both the sub-control circuit 220 and the main control circuit 240 use the first thyristor to control the on / off of the AC mains live wire to meet the control requirements of the thyristor.

[0068] like Figure 10 As shown, the power supply circuit 210 includes: a switching power supply chip U2, a first diode D3, a second diode D5, a third diode D4, a first capacitor C11, a first resistor R4, and an inductor L3.

[0069] The DRAIN terminal of the switching power supply chip U2 is connected to the negative terminal of the first diode D3 and the second capacitor C6. The positive terminal of the first diode D3 is connected to the live wire of the AC mains, and the other end of the second capacitor C6 is connected to the neutral wire of the AC mains.

[0070] The CS terminal of the switching power supply chip U2 is connected to the first resistor R4. The other end of the first resistor R4 is connected to the inductor L3, the first capacitor C11, and the negative terminal of the third diode D4. The other end of the inductor L3 is connected to the neutral line of the AC mains. The other end of the first capacitor C11 is connected to the VDD terminal of the switching power supply chip U2.

[0071] The VDD terminal of the switching power supply chip U2 is connected to the negative terminal of the second diode D5, and the positive terminal of the second diode D5 is connected to the neutral wire of the AC mains.

[0072] A third capacitor C2 is connected in parallel between the neutral wire of the AC mains power and the positive terminal of the third diode D4. The neutral wire of the AC mains power is the positive output terminal of the 5V DC power, and the positive terminal of the third diode D4 is the negative output terminal of the 5V DC power. This meets the working requirements of the switching power supply chip U2, and the circuit is simple, low in cost, and small in size. The second diode D5 is used to provide DC power to the VDD terminal of the power switch chip, the third diode D4 is used for rectification, and the inductor L3 works with the first capacitor C11 for filtering. The inductor L3 also serves to block DC and, together with the third diode D4, circulates the 5V DC power.

[0073] like Figure 10 As shown, the switching power supply chip U2, model KP3111, can operate directly with a 220V input voltage, eliminating the need for a transformer and reducing cost and product size.

[0074] like Figure 10 As shown, a second resistor R3 is connected in series between the positive terminal of the first diode D3 and the live wire of the AC mains power supply to limit the current.

[0075] like Figure 10 As shown, a varistor MOV1 is connected in parallel between the live wire and the neutral wire of the AC mains for overvoltage protection.

[0076] like Figure 10 and Figure 12 As shown, the main control circuit is also connected to a second thyristor TR3. The gate of the second thyristor TR3 is connected to a third resistor R29, and the other end of the third resistor R29 is connected to the main control circuit. The first main electrode of the second thyristor TR3 is connected to the neutral wire of the negative ion generator, and the second main electrode is connected to the neutral wire of the AC mains. The live wire of the negative ion generator is connected to the live wire of the AC mains. The circuit is simple and low in cost.

[0077] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A straightening comb, characterized in that, The straightening comb comprises a main body, a heating structure arranged in the main body, a temperature control circuit arranged in the main body, and a handle. The heating structure comprises one or more heating bodies and a heat-conducting comb assembly, the heating bodies heat the heat-conducting comb assembly, and the heating bodies are internally provided with one or more heating wires, the heating wires are arranged in one over another or horizontally and insulated from each other. The temperature control circuit comprises a power supply circuit, a main control circuit, a sub-control circuit and a current detection circuit. The power supply circuit is connected with the main control circuit, the sub-control circuit and the current detection circuit are connected with the main control circuit, and the sub-control circuit is controlled by the main control circuit. The main control circuit controls the working gear and on-off of the heating wires according to the voltage of the alternating current, and pulse width modulation is performed on the heating wires according to the working current of the heating wires. The working gear of the heating wires comprises a one-gear working gear and a two-gear working gear. The heat-conducting comb assembly comprises heat-conducting teeth, a heat-protective cloth and a heat-insulating sleeve, the heat-conducting teeth are in thermal conduction connection with the heating bodies, the heat-conducting teeth are provided with heat-conducting surfaces on the sides, the heat-protective cloth covers at least the heat-conducting surfaces, the heat-insulating sleeve is provided with a gap on the side, and the gap is arranged corresponding to the heat-conducting surfaces to expose the part of the heat-protective cloth covering the heat-conducting surfaces. The heat-conducting teeth are provided with the heat-conducting surfaces on the opposite sides, and the heat-insulating sleeve is provided with the gap corresponding to each heat-conducting surface.

2. The straightening comb of claim 1, wherein, The main body comprises a handle and a mounting portion arranged at one end of the handle, and the heating bodies and the heat-conducting comb assembly are arranged in the mounting portion.

3. The straightening comb of claim 2, wherein, The straightening comb further comprises floating comb teeth and an elastic member, the mounting portion is provided with a mounting space, the floating comb teeth are movably arranged in the mounting space along the length direction of the heat-conducting teeth and extend into the heat-conducting teeth, the end of the floating comb teeth is protruding compared with the end of the heat-insulating sleeve, and the elastic member is arranged between the floating comb teeth and the mounting portion.

4. The straightening comb of claim 2, wherein, A thermistor or a self-recovery temperature fuse is arranged in the heating body, the thermistor detects the temperature of the heating body, the self-recovery temperature fuse also detects the temperature of the heating wires and performs over-temperature power-off protection on the heating wires. The thermistor is connected with the main control circuit, and the main control circuit performs pulse width modulation on the heating wires according to the temperature of the heating body.

5. The straightening comb of claim 1, wherein, The live wire of the alternating current is connected in series with the main control circuit, and the main control circuit is connected in series with the self-recovery temperature fuse. The heating wires and the current detection circuit are connected in series with the zero line of the alternating current in sequence.

6. The straightening comb of claim 5, wherein, ​ ​ The main control circuit is controlled by the main control circuit, and the main control circuit and the sub-control circuit control the on-off of the live wire of the AC power supply.

7. The straightening comb of claim 6, wherein, The voltage detection circuit and the zero point detection circuit are connected with the AC power supply, and the voltage detection circuit and the zero point detection circuit are connected with the main control circuit; the voltage detection circuit detects the voltage of the AC power supply, and the zero point detection circuit detects whether the AC power supply is at zero point; When the voltage of the AC power supply is in the range of 110V AC power supply voltage, the main control circuit controls the heating wire to work in the first gear working position through the sub-control circuit, and vice versa, when the voltage of the AC power supply is in the range of 220V AC power supply voltage, the main control circuit controls the heating wire to work in the second gear working position through the sub-control circuit; When the AC power supply is at zero point, the main control circuit controls the sub-control circuit or the main control circuit to stop working; the sub-control circuit and the main control circuit control the on-off of the live wire of the AC power supply by using the first thyristor.

8. The straightening comb of claim 1, wherein, The power supply circuit comprises a switching power supply chip, a first diode, a second diode, a third diode, a first capacitor, a first resistor and an inductor; The DRAIN end of the switching power supply chip is connected with the negative electrode of the first diode and a second capacitor, the positive electrode of the first diode is connected with the live wire of the AC power supply, and the other end of the second capacitor is connected with the zero line of the AC power supply; The CS end of the switching power supply chip is connected with the first resistor, the other end of the first resistor is connected with the inductor, the first capacitor and the negative electrode of the third diode, the other end of the inductor is connected with the zero line of the AC power supply, and the other end of the first capacitor is connected with the VDD end of the switching power supply chip; The VDD end of the switching power supply chip is connected with the negative electrode of the second diode, and the positive electrode of the second diode is connected with the zero line of the AC power supply; A third capacitor is connected in parallel between the zero line of the AC power supply and the positive electrode of the third diode, the zero line of the AC power supply is the positive output end of the 5V DC, and the positive electrode of the third diode is the negative output end of the 5V DC.

9. The straightening comb of claim 8, wherein, The model of the switching power supply chip is KP3111.

10. The straightening comb of claim 1, wherein, The main control circuit is further connected with a second thyristor, the gate electrode of the second thyristor is connected with a third resistor, the other end of the third resistor is connected with the main control circuit; the first main electrode of the second thyristor is connected with the zero line of the negative ion generator, the second main electrode is connected with the zero line of the AC power supply, and the live wire of the negative ion generator is connected with the live wire of the AC power supply.

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