CN203632217U - Automatic power-off protection alarm device for hair dryer overheating - Google Patents
Automatic power-off protection alarm device for hair dryer overheating Download PDFInfo
- Publication number
- CN203632217U CN203632217U CN201320335941.1U CN201320335941U CN203632217U CN 203632217 U CN203632217 U CN 203632217U CN 201320335941 U CN201320335941 U CN 201320335941U CN 203632217 U CN203632217 U CN 203632217U
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- hair dryer
- relay
- alarm device
- power supply
- resistor
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Abstract
The utility model relates to an automatic power-off protection alarm device for hair dryer overheating. According to the technical scheme, a transformer T, a rectifying block DZ, and a resistor R2 form a power supply circuit; a resistor R, a relay J and a P-type control gate hot thyristor TT102 are connected in series and then connected in parallel with a capacitor C1 to form a temperature detection control circuit; a light-emitting diode LED is connected in series beside the relay J to play the role of light prompt alarm; the temperature detection control circuit is connected in parallel onto a resistor R2 at the output end of the power supply circuit; and a normally closed contact of J-1 of the relay J is connected in series onto an electric heating resistor R1 of a main circuit. According to the automatic power-off protection alarm device for hair dryer overheating, the structure is simple; the installation is convenient; the device is installed in front of a heating pipe power supply of the hair dryer, automatic power off and light emitting alarm can be realized when the temperature of the heating pipe of the hair dryer is excessively high, and the purpose of preventing the heating pipe of the hair dryer from being burnt down can be achieved.
Description
Technical field
The utility model relates to the control warning circuit of field of electric heating, specifically the overheated auto-breaking protection of a kind of hair dryer alarm device.
Background technology
Household blower only has heater circuit at present, and lacks overheated automatic shutdown protection warning circuit, once temperature control causes the overheated heating tube that just likely burns hair-dryer of hair-dryer.
Summary of the invention
The purpose of this utility model is exactly the deficiency existing for prior art, and the overheated power-off protection alarm device of hair-dryer of realizing auto-breaking luminous alarm under a kind of hair-dryer overheat condition is provided.
Its technical scheme is: the power supply circuits that are made up of transformer T, rectifying block DZ, resistance R 2; The temperature detection warning circuit being formed by capacitor C 1, C2, resistance R 3, R4, LED, the hot thyristor TT102 of P type control gate, relay J; The normally closed switch J-1 of relay J is connected on the electric heater R1 of main circuit.
The utility model is simple in structure, easy for installation, is arranged on before the heating tube power supply of hair-dryer, can in the time of the heating tube excess Temperature of hair-dryer, realize the effect of auto-breaking and luminous alarm, reaches the object that prevents from burning hair-dryer heating tube.
Accompanying drawing explanation
Accompanying drawing is the circuit theory diagrams of a kind of embodiment.In figure, A, N are attaching plugs; R1 is the heating resistor of hair-dryer.
Embodiment:
Be further described with regard to playing circuit formation and operation principle below in conjunction with accompanying drawing:
Transformer T, rectifying block DZ, resistance R 2 form power supply circuits; Capacitor C 1, C2, resistance R 1, R2, relay J, the hot thyristor TT102 of P type control gate form relay drive circuit, to reach the effect of temperature detection control; The normally closed switch J-1 of relay J is connected in parallel on the heating resistor R1 of main circuit; Form hot luminescence warning circuit at the other series connection of TT102 LED; Known according to the characteristic of TT102, the conducting temperature of TT102 is definite by the resistance of resistance R 4, and R4 resistance is larger, and conducting temperature is lower.
In the time that hair-dryer internal temperature does not exceed permissible value, hot thyristor TT102 is by, the not luminous alarm of LED, the normally closed switch J-1 place closure state of relay J, and hair-dryer is normally worked; In the time that hair-dryer internal temperature exceedes permissible value, hot thyristor is to TT102 conducting, the luminous alarm of LED, and the normally closed J-1 that opens the light of relay J disconnects, and the heating resistor R1 power supply of hair-dryer is closed.Thereby the protection object of auto-breaking and luminous alarm while forming hair-dryer excess Temperature.
Claims (2)
1. the overheated auto-breaking protection of a hair dryer alarm device, comprises the power supply circuits that mains switch (K), transformer (T), rectifying block (DZ) link form; By after resistance (R), relay (J), the hot thyristor of P type control gate (TT102) series connection and electric capacity (C1) compose in parallel temperature detection control circuit; Temperature detection control circuit is connected in parallel on power supply circuits output resistance (R2); The normally-closed contact (J-1) of relay (J) is connected on the electric resistance (R1) of main circuit; It is characterized in that: form light warning circuit at relay other series connection light-emitting diode (LED).
2. the overheated auto-breaking protection of hair dryer according to claim 1 alarm device, is characterized in that: at relay (J) the hot thyristor of other series connection (TT102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320335941.1U CN203632217U (en) | 2013-06-13 | 2013-06-13 | Automatic power-off protection alarm device for hair dryer overheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320335941.1U CN203632217U (en) | 2013-06-13 | 2013-06-13 | Automatic power-off protection alarm device for hair dryer overheating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632217U true CN203632217U (en) | 2014-06-04 |
Family
ID=50818659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320335941.1U Expired - Fee Related CN203632217U (en) | 2013-06-13 | 2013-06-13 | Automatic power-off protection alarm device for hair dryer overheating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632217U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142591A (en) * | 2019-12-24 | 2020-05-12 | 追觅科技(上海)有限公司 | Temperature sudden change detection method and device and storage medium |
-
2013
- 2013-06-13 CN CN201320335941.1U patent/CN203632217U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142591A (en) * | 2019-12-24 | 2020-05-12 | 追觅科技(上海)有限公司 | Temperature sudden change detection method and device and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20150613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |