CN212060995U - Temperature control circuit of hairdressing device - Google Patents
Temperature control circuit of hairdressing device Download PDFInfo
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- CN212060995U CN212060995U CN202020856024.8U CN202020856024U CN212060995U CN 212060995 U CN212060995 U CN 212060995U CN 202020856024 U CN202020856024 U CN 202020856024U CN 212060995 U CN212060995 U CN 212060995U
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Abstract
The utility model discloses a hair-dressing ware temperature control circuit, including MCU and heating circuit, heating circuit is including parallelly connected first heat-generating body and the second heat-generating body in AC input power output side, first heat-generating body establishes ties has first switching device, second heat-generating body establishes ties has second switching device, MCU is connected with first switching device and second switching device respectively in order to control it to switch on and turn-off respectively. Compared with the prior art, the utility model discloses hair-dressing device temperature control circuit simple structure, safe and reliable, it is first switching device and second switching device of establishing ties respectively on first heat-generating body and second heat-generating body promptly, through first switching device and second switching device first heat-generating body of control respectively and second heat-generating body, when first heat-generating body and second heat-generating body temperature inconsistent, but the first heat-generating body of independent control or second heat-generating body for both temperatures are unanimous, thereby improve user experience with reducing the potential safety hazard.
Description
Technical Field
The utility model relates to an electric heater technical field, more specifically relate to a hair-dressing device temperature control circuit.
Background
The hair curler comprises a hair straightener and a hair curler which are used for hair styling, the hair straightener and the hair curler are common tools for hairdressing of beauty lovers, can be frequently used for hair styling, are handheld hairdressing electronic products for straightening or curling hair, and can be used for greatly facilitating people to shape hair.
In the prior art, the control circuits of the hair straightener and the hair curler are usually controlled by a microcomputer, that is, the circuit is composed of a circuit board, a heating element and a temperature sensing element, and a MCU on the circuit board controls the heating element to work.
In view of the above, it is desirable to provide a temperature control circuit for a hair clipper that is simple in structure, safe and reliable to solve the above-mentioned drawbacks.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a simple structure and safe and reliable's curling iron temperature control circuit is provided.
In order to solve the technical problem, the utility model provides a hair-dressing device temperature control circuit, it includes MCU and heating circuit, heating circuit is including parallelly connected first heat-generating body and the second heat-generating body in AC input power output side, first heat-generating body is established ties and is had first switching device, second heat-generating body is established ties and is had second switching device, MCU is connected with first switching device and second switching device respectively in order to control it to switch on and turn-off respectively.
The further technical scheme is as follows: the temperature control circuit further comprises a current detection circuit which is connected with the heating circuit to detect the current flowing through the heating circuit, and the MCU controls the first switching device and the second switching device to be switched on and off according to the detection result from the current detection circuit.
The further technical scheme is as follows: the current detection circuit is a current sensor.
The further technical scheme is as follows: the temperature control circuit further comprises a first detection circuit, the first detection circuit comprises a first NTC thermistor and a first resistor, one end of the first NTC thermistor is connected with the VCC, one end of the first resistor is grounded, and the other ends of the first NTC thermistor and the first resistor are connected with the MCU.
The further technical scheme is as follows: the temperature control circuit further comprises a second detection circuit, the second detection circuit comprises a second NTC thermistor and a second resistor, one end of the second NTC thermistor is connected with the VCC, one end of the second resistor is grounded, and the other ends of the second NTC thermistor and the second resistor are connected with the MCU.
The further technical scheme is as follows: the temperature control circuit further comprises a third switching device, the third switching device is connected between the alternating current input power supply live wire and the heating circuit, and the MCU is connected with the third switching device to control the work of the MCU.
The further technical scheme is as follows: the first switching device, the second switching device and the third switching device are all silicon controlled rectifiers.
The further technical scheme is as follows: the temperature control circuit further comprises a fuse connected between the live wire of the alternating current input power supply and the heating circuit.
The further technical scheme is as follows: the fuse is a temperature fuse.
The further technical scheme is as follows: the temperature control circuit further comprises a current fuse connected between a live wire of the alternating current input power supply and the heating circuit.
Compared with the prior art, the utility model discloses hair-dressing device temperature control circuit simple structure, safe and reliable, it is first switching device and second switching device of establishing ties respectively on first heat-generating body and second heat-generating body promptly, through first switching device and second switching device first heat-generating body of control respectively and second heat-generating body, when first heat-generating body and second heat-generating body temperature inconsistent, but the first heat-generating body of independent control or second heat-generating body for both temperatures are unanimous, thereby improve user experience with reducing the potential safety hazard.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the temperature control circuit of the hair salon device of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a circuit diagram of a specific embodiment of the temperature control circuit of the hair salon device of the present invention. In the embodiment shown in the drawing, the temperature control circuit comprises an MCU and a heating circuit 10, the heating circuit 10 comprises a first heating element H1 and a second heating element H2 which are connected in parallel on the output side of an ac input power supply, the first heating element H1 is connected in series with a first switching device SCR1, the second heating element H2 is connected in series with a second switching device SCR2, and the MCU is respectively connected with the first switching device SCR1 and the second switching device SCR2 to respectively control the on and the off of the first switching device SCR1 and the second switching device SCR 2. Preferably, in this embodiment, the MCU is a chip with a model number FT62F08X, the SCR1 and the SCR2 are both bidirectional thyristors, a control electrode of the SCR1 is connected to the MCU through a current limiting resistor R3, and a control electrode of the SCR2 is connected to the MCU through a current limiting resistor R4. Based on the above design, the utility model discloses first heat-generating body H1 and second heat-generating body H2 are controlled respectively to hair-dressing ware temperature control circuit through first switching device SCR1 and second switching device SCR2, when first heat-generating body H1 and second heat-generating body H2 temperature inconsistent, but first heat-generating body H1 of independent control or second heat-generating body H2 for both temperature are unanimous, thereby improve user experience with reducing the potential safety hazard, moreover, the steam generator is simple in structure, safety and reliability.
In some embodiments, the temperature control circuit further includes a current detection circuit, preferably, the current detection circuit is a current sensor RS connected to the heating circuit 10 to detect a current flowing through the heating circuit 10, and the MCU controls the first switching device SCR1 and the second switching device SCR2 to be turned on and off according to a detection result from the current sensor RS. It can be known, the utility model discloses still can detect heating circuit 10's current change through current sensor RS to whether open a way or whether first switching device SCR1 and second switching device SCR2 take place the short circuit in detecting parallelly connected first heat-generating body H1 and second heat-generating body H2, MCU is detecting to appear opening a way or when short circuit fault steerable first switching device SCR1 and second switching device SCR2 break off thereby avoid the hair-dressing ware to damage because of fault temperature is too high.
In the embodiment shown in the figures, the temperature control circuit further comprises a first detection circuit 20 and a second detection circuit 30, the first detection circuit 20 comprises a first NTC thermistor NTC1 and a first resistor R1, one end of the first NTC thermistor NTC1 is connected to a power supply VCC, one end of the first resistor R1 is connected to ground, and the other ends of the first NTC thermistor NTC1 and the first resistor R1 are both connected to the MCU; the second detection circuit 30 comprises a second NTC thermistor NTC2 and a second resistor R2, one end of the second NTC thermistor NTC2 is connected with the power VCC, one end of the second resistor R2 is grounded, and the other ends of the second NTC thermistor NTC2 and the second resistor R2 are both connected with the MCU. The hair straightener and hair curler applied by the temperature control circuit of the utility model are provided with circuit boards, the circuit boards are provided with a master control MCU, the first heating element H1 and the second heating element H2 are respectively positioned in the upper and lower splints of the hair straightener or in the upper and lower aluminum tubes of the hair curling bar in the hair curler, as known from the above, the first NTC thermistor NTC1 in the embodiment is close to or attached to the first heating element H1 to detect the temperature change of the first heating element H1, when the first heating element H1 generates heat, the first NTC thermistor NTC1 decreases along with the temperature change resistance in an exponential relationship, the MCU sends a signal to the first switch device SCR1 when the resistance of the first thermistor NTC1 decreases to a preset threshold value, so as to turn off the first switch device SCR1 connected with the first heating element H1 through the MCU when the first heating element H1 is overheated, so as to protect the hair curler, and when the first heating element H1 detects that the first NTC1 has no signal or small signal change, and when the current signal of the current sensor RS is lost, the SCR1 is turned off, so that the hairdressing device is effectively protected, the first NTC thermistor NTC1 is equivalent to a fixed resistor when failing, and if the MCU detects that the current signal from the current sensor RS is not matched with the normal working state, the SCR1 is turned off, so that the hairdressing device is protected. Similarly, the second NTC thermistor NTC2 is close to or attached to the second heating element H2.
In some embodiments, the temperature control circuit further includes a third switching device SCR3, the third switching device SCR3 is connected between the ac input power line ACL and the heating circuit 10, and the MCU is connected to the third switching device SCR3 to control the on/off of the third switching device SCR3, preferably, the third switching device SCR3 is also a triac, and its control terminal is also connected to the MCU through a current limiting resistor R5.
In the embodiment shown in the drawings, the temperature control circuit further includes a fuse TF connected between an ac input power supply line ACL and the heating circuit 10, and preferably, the fuse TF is a temperature fuse, one end of which is connected to the ac input power supply line ACL, and the other end of which is connected to the first heating element H1 and the second heating element H2. Based on the design, the temperature fuse is fused when the temperature of the first heating element H1 or the second heating element H2 exceeds a preset threshold value, so that the first heating element H1 or the second heating element H2 is prevented from being continuously heated to damage the hairdressing device or fuse the shell. Understandably, in certain other embodiments, the temperature control circuit may further include a current fuse connected between the ac input power line ACL and the heating circuit 10 to prevent damage to the hair clipper due to overheating when the current is too high.
Understandably, if the utility model discloses an SCR1, SCR2 and SCR3 among the hair-dressing device temperature control circuit switch on simultaneously, then the electric current that current sensor RS detected is total current, and if SCR1 and SCR3 switch on simultaneously and SCR2 cuts off, then the electric current that current sensor RS detected is the branch road current of first heat-generating body H1 place branch road, if SCR2 and SCR3 switch on simultaneously and SCR1 cuts off, then the electric current that current sensor RS detected is the branch road current of second heat-generating body H2 place branch road.
If the SCR1 or SCR2 is to be detected as short-circuited, the SCR3 is turned on first, if the current sensor RS has a signal, the SCR1 or SCR2 is short-circuited, and the SCR2 is turned on, if the current sensor RS signal is large, it is determined that the SCR1 is short-circuited, and if the current sensor RS signal is unchanged, the SCR2 is short-circuited. Understandably, whether the first and second heaters H1 and H2 are open-circuited or not can be detected by the current sensor RS, the first NTC thermistor NTC1, and the second NTC thermistor NTC2, and open-short circuit conditions of the SCR1, the SCR2, and the SCR3 can be detected to further protect the hair clipper.
To sum up, the temperature control circuit of the hair salon device of the present invention has a simple structure, is safe and reliable, i.e. the first switch device and the second switch device are respectively connected in series on the first heating element and the second heating element, the first heating element and the second heating element are respectively controlled by the first switch device and the second switch device, when the temperatures of the first heating element and the second heating element are not consistent, the first heating element or the second heating element can be independently controlled, so that the temperatures of the first heating element and the second heating element are consistent, thereby reducing the potential safety hazard and improving the user experience, and the current change of the heating circuit can be detected by the current detection circuit, so as to detect whether the open circuit occurs on the first heating element and the second heating element which are connected in parallel or whether the short circuit occurs on the first switch device and the second switch device occurs, when the open circuit or the short circuit fault occurs, the MCU can control the disconnection of the first switch device and the second switch device, thereby avoiding, simple structure, safety and reliability.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (10)
1. A hair-dressing ware temperature control circuit which characterized in that: the temperature control circuit comprises an MCU and a heating circuit, the heating circuit comprises a first heating body and a second heating body which are connected in parallel on the output side of the alternating current input power supply, the first heating body is connected with a first switching device in series, the second heating body is connected with a second switching device in series, and the MCU is connected with the first switching device and the second switching device respectively to control the conduction and the disconnection of the MCU.
2. The hair waver temperature control circuit of claim 1, wherein: the temperature control circuit further comprises a current detection circuit which is connected with the heating circuit to detect the current flowing through the heating circuit, and the MCU controls the first switching device and the second switching device to be switched on and off according to the detection result from the current detection circuit.
3. The hair waver temperature control circuit of claim 2, wherein: the current detection circuit is a current sensor.
4. The hair waver temperature control circuit of claim 1, wherein: the temperature control circuit further comprises a first detection circuit, the first detection circuit comprises a first NTC thermistor and a first resistor, one end of the first NTC thermistor is connected with the VCC, one end of the first resistor is grounded, and the other ends of the first NTC thermistor and the first resistor are connected with the MCU.
5. The hair waver temperature control circuit of claim 4, wherein: the temperature control circuit further comprises a second detection circuit, the second detection circuit comprises a second NTC thermistor and a second resistor, one end of the second NTC thermistor is connected with the VCC, one end of the second resistor is grounded, and the other ends of the second NTC thermistor and the second resistor are connected with the MCU.
6. The hair waver temperature control circuit of claim 1, wherein: the temperature control circuit further comprises a third switching device, the third switching device is connected between the alternating current input power supply live wire and the heating circuit, and the MCU is connected with the third switching device to control the work of the MCU.
7. The hair waver temperature control circuit of claim 6, wherein: the first switching device, the second switching device and the third switching device are all silicon controlled rectifiers.
8. The hair waver temperature control circuit of claim 1, wherein: the temperature control circuit further comprises a fuse connected between the live wire of the alternating current input power supply and the heating circuit.
9. The hair waver temperature control circuit of claim 8, wherein: the fuse is a temperature fuse.
10. The hair waver temperature control circuit of claim 1, wherein: the temperature control circuit further comprises a current fuse connected between a live wire of the alternating current input power supply and the heating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020856024.8U CN212060995U (en) | 2020-05-20 | 2020-05-20 | Temperature control circuit of hairdressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020856024.8U CN212060995U (en) | 2020-05-20 | 2020-05-20 | Temperature control circuit of hairdressing device |
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| CN212060995U true CN212060995U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020856024.8U Active CN212060995U (en) | 2020-05-20 | 2020-05-20 | Temperature control circuit of hairdressing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935951A (en) * | 2022-04-08 | 2022-08-23 | 山东国创燃料电池技术创新中心有限公司 | Temperature control method for fuel cell test fixture |
-
2020
- 2020-05-20 CN CN202020856024.8U patent/CN212060995U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935951A (en) * | 2022-04-08 | 2022-08-23 | 山东国创燃料电池技术创新中心有限公司 | Temperature control method for fuel cell test fixture |
| CN114935951B (en) * | 2022-04-08 | 2024-01-30 | 山东国创燃料电池技术创新中心有限公司 | Temperature control method for fuel cell test fixture |
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