CN201860082U - Small home appliance and protection device thereof - Google Patents
Small home appliance and protection device thereof Download PDFInfo
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- CN201860082U CN201860082U CN2010202429894U CN201020242989U CN201860082U CN 201860082 U CN201860082 U CN 201860082U CN 2010202429894 U CN2010202429894 U CN 2010202429894U CN 201020242989 U CN201020242989 U CN 201020242989U CN 201860082 U CN201860082 U CN 201860082U
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Abstract
The utility model relates to a small home appliance and a protection device thereof, and the protection device is connected between an AC power supply and a power supply circuit; the protection device comprises an abnormal protection circuit, an operating switch, a conduction circuit, a driving circuit and a detection circuit; wherein the abnormal protection circuit is respectively in electrical connection with the operating switch, the conduction circuit and the driving circuit. With the protection device in the circuit of the small home appliance, each function module, such as a control circuit and the like, of the small home appliance is connected to the AC power supply through the protection device rather than directly connected to the AC power supply, so that the conduction circuit does not work if the operating switch does not act when the small home appliance is connected with the power supply, the work circuit cannot form a loop, and each electronic element is in non-working state or not charged, thereby the small home appliance is protected. When the small home appliance is connected with the power supply and an exception occurs, the protection device performs power-off protection.
Description
Technical field
The utility model relates to protective device, more particularly, relates to a kind of small household appliances and protective device thereof.
Background technology
In the circuit of existing small household appliances; after the general connection AC power; after carrying out shaping, Filtering Processing by power circuit; just offer each functional parts such as control circuit; therefore; when when small household appliances are worked or owing to external cause, causing taking place unusually, do not have special protective device, detect and monitor the working condition of small household appliances in real time and carry out the abnormal power-down protection.
The utility model content
The technical problems to be solved in the utility model is, do not have special protective device at the small household appliances of prior art, detects and monitors the working condition of small household appliances in real time and carry out defectives such as abnormal power-down protection, and a kind of small household appliances protective device is provided.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of small household appliances protective device, described small household appliances comprise AC power in sequential series, power circuit and control circuit, and described protective device is connected between described AC power and the power circuit; Described protective device comprises abnormity protection circuit, console switch, connection circuit, drive circuit and testing circuit; Wherein, described abnormity protection circuit is electrically connected with described console switch, connection circuit and drive circuit respectively; Described console switch also is electrically connected with described testing circuit and power circuit; Described connection circuit also is electrically connected with described drive circuit and testing circuit; Described drive circuit and testing circuit also are electrically connected with described control circuit respectively.
In small household appliances protective device described in the utility model, described abnormity protection circuit comprises Thermal Cutoffs, resistance R 1 and bidirectional triode thyristor; Wherein, an end of described Thermal Cutoffs is connected with the zero line of described AC power, and the other end is coupled to described connection circuit; One end of described resistance R 1 is connected with the live wire of described AC power, and the other end is connected with the first anode of described bidirectional triode thyristor, and the second plate of described bidirectional triode thyristor is connected to described connection circuit, and its control utmost point is connected to described drive circuit.
In small household appliances protective device described in the utility model, described connection circuit comprises relay R Y1, resistance R 5 and diode D2; Wherein, the fixed contact of described relay R Y1 is connected to described abnormity protection circuit, its first moving contact ground connection, and its second moving contact is connected with described resistance R 5, and the other end of described resistance R 5 is connected to described console switch; One end of the coil of the anode of described diode D2 and relay R Y1 all is connected to described power circuit; The other end of the coil of the negative electrode of described diode D2 and relay R Y1 all is connected to described drive circuit.
In small household appliances protective device described in the utility model, described drive circuit comprises diode D1, resistance R 2, R3 and R4, reaches triode T1; Wherein, an end of described resistance R 3 is electrically connected with described control circuit, and the other end of described resistance R 3 is connected to an end of base stage and the described resistance R 4 of described triode T1; The other end ground connection of the emitter of described triode T1 and resistance R 4; The collector electrode of described triode T1 is connected to an end of described connection circuit and described resistance R 2; The other end of described resistance R 2 is connected to the negative electrode of described diode D1, and the anode of described diode D1 is connected to described abnormity protection circuit.
In small household appliances protective device described in the utility model, described console switch is that console switch is a single-pole double-throw switch (SPDT), its fixed contact ground connection, and its first moving contact is connected to described testing circuit, and its second moving contact is connected to described connection circuit.
In small household appliances protective device described in the utility model, described testing circuit comprises resistance R 7 and resistance R 6; Wherein, an end of described resistance R 7 is coupled to described power circuit, and the other end of described resistance R 7 is connected with an end of described resistance R 6 and both connected nodes are connected to described console switch, and the other end of described resistance R 6 is connected to described control circuit.
According to another aspect of the present utility model, a kind of small household appliances are provided, it comprises AC power in sequential series, power circuit and control circuit, is connected with protective device between described AC power and power circuit; Described protective device comprises abnormity protection circuit, console switch, connection circuit, drive circuit and testing circuit; Wherein, described abnormity protection circuit is electrically connected with described console switch, connection circuit and drive circuit respectively; Described console switch also is electrically connected with described testing circuit and power circuit; Described connection circuit also is electrically connected with described drive circuit and testing circuit; Described drive circuit and testing circuit also are electrically connected with described control circuit respectively.
Implement small household appliances of the present utility model and protective device thereof; has following beneficial effect: by in the circuit of small household appliances, protective device being set; make that each functional modules such as control circuit of small household appliances are not to be directly connected to AC power but to connect by this protective device; thereby realize after body is connected with the mains if console switch does not move; connecting circuit can not work; entire circuit can not form the loop like this, and it is not charged in other words that each electronic component is in non operating state, plays protection.When connecting with the mains the back circuit abnormal, body carries out power-off protection.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the theory diagram of the utility model small household appliances;
Fig. 2 is the circuit theory diagrams of Fig. 1.
Embodiment
As shown in Figure 1; in small household appliances of the present utility model; when these small household appliances with after AC power 1 is communicated with; the electric current of AC power 1 input at first needs the processing through power circuit 2; offer control circuit 3 again and wait each functional module; in order to realize protection to whole small household appliances circuit; one protective device 4 is set in the technical program specially to be connected between AC power 1 and the power circuit 2; thereby when concrete work; whether the electric current and the voltage that detect this small household appliances internal circuit are in normal operating conditions; when appearance is unusual, entire circuit can be turn-offed, carry out power-off protection.
In a preferred embodiment, this protective device 4 comprises abnormity protection circuit 41, console switch 42, connects circuit 43, drive circuit 44 and testing circuit 45; Wherein, abnormity protection circuit 41 is electrically connected with console switch 42, connection circuit 43 and drive circuit 44 respectively; Console switch 42 also is electrically connected with testing circuit 45 and power circuit 2; Connecting circuit 43 also is electrically connected with drive circuit 44 and testing circuit 45; Drive circuit 44 and testing circuit 45 also are electrically connected with control circuit 3 respectively.Fig. 1 shows the annexation of each parts, and wherein solid line is represented the direction of power supply signal, and dotted line is represented the direction of control signal.Wherein, in the cooperating of console switch 42, connection circuit 43, drive circuit 44 and testing circuit 45, carry out the detection of electric current and/or voltage by 45 pairs of console switchs 42 of testing circuit, connection circuit 43, thereby whether decision circuitry operate as normal, when just often, drives drive circuits 44 by control circuit 3, further drive by drive circuit 44 again and connect circuit 43 conductings power supply, and detect when unusual when testing circuit 45, then control is connected circuit 43 and is turn-offed, and disconnects power supply.In addition, if console switch 42, connect circuit 43, drive circuit 44 and testing circuit 45 when unusual, then abnormity protection circuit 41 power cutoffs carry out the protection of entire circuit.
Thus, after the small household appliances body is connected with the mains,, connect circuit and can not work if console switch does not move; entire circuit can not form the loop like this; it is not charged in other words that each electronic component is in non operating state, plays protection (circuit itself can not form the loop, and each electronic component is not charged).When connecting with the mains the back circuit abnormal, body carries out power-off protection (the current supply circuit protection of cutting off the electricity supply).In case the console switch action, circuit promptly forms the loop and starts working, and testing circuit is started working at this moment, and whether testing circuit is unusual constantly, and abnormity protection circuit is started working the current supply circuit of then cutting off the electricity supply in the time can not automatically terminating unusually when generation is unusual.When specific design, these small household appliances can be household small household appliances, personal nursing small household appliances or kitchen small household appliances, for example, electric fan, electric heater, humidifier, air freshener, water dispenser, hair dryer, electric shaver, electric iron, electric toothbrush, electronics beauty instrument, electronic masseur, electromagnetic oven, microwave oven, electric cooker, disinfection cupboard, roaster, bread producing machine, mixer, juice extractor, electronics coffee pot or electric kettle.Understandable, these small household appliances also can be other small household appliances.
Among the embodiment as shown in Figure 2, abnormity protection circuit 41 comprises Thermal Cutoffs, resistance R 1 and bidirectional triode thyristor; Wherein, an end of Thermal Cutoffs is connected with the zero line 12 of AC power 1, and the other end is coupled to connects circuit 43; One end of resistance R 1 is connected with the live wire 11 of AC power 1, and the other end is connected with the first anode of bidirectional triode thyristor, and the second plate of bidirectional triode thyristor is connected to connects circuit 43, and its control utmost point is connected to drive circuit 44.Connect circuit 43 and comprise relay R Y1, resistance R 5 and diode D2; Wherein, the fixed contact of relay R Y1 is connected to abnormity protection circuit 41, its first moving contact ground connection, and its second moving contact is connected with resistance R 5, and the other end of resistance R 5 is connected to console switch 42; One end of the coil of the anode of diode D2 and relay R Y1 all is connected to power circuit 2; The other end of the coil of the negative electrode of diode D2 and relay R Y1 all is connected to drive circuit 44.Drive circuit 44 comprises diode D1, resistance R 2, R3 and R4, reaches triode T1; Wherein, an end of resistance R 3 is electrically connected with control circuit 3, and the other end of resistance R 3 is connected to an end of base stage and the resistance R 4 of triode T1; The other end ground connection of the emitter of triode T1 and resistance R 4; The collector electrode of triode T1 is connected to an end of connecting circuit 43 and resistance R 2; The other end of resistance R 2 is connected to the negative electrode of diode D1, and the anode of diode D1 is connected to abnormity protection circuit 41.Console switch 42 is that console switch is a single-pole double-throw switch (SPDT), its fixed contact ground connection, and its first moving contact is connected to testing circuit 45, and its second moving contact is connected to connects circuit 43.Testing circuit 45 comprises resistance R 7 and resistance R 6; Wherein, an end of resistance R 7 is coupled to power circuit, and the other end of resistance R 7 is connected with an end of resistance R 6 and both connected nodes are connected to console switch 42, and the other end of resistance R 6 is connected to control circuit 3.
The utility model describes by several specific embodiments, it will be appreciated by those skilled in the art that under the situation that does not break away from the utility model scope, can also carry out various conversion and be equal to alternative the utility model.In addition, at particular condition or concrete condition, can make various modifications to the utility model, and not break away from scope of the present utility model.Therefore, the utility model is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the utility model claim scope.
Claims (7)
1. small household appliances protective device, described small household appliances comprise AC power in sequential series, power circuit and control circuit, it is characterized in that, described protective device is connected between described AC power and the power circuit; Described protective device comprises abnormity protection circuit, console switch, connection circuit, drive circuit and testing circuit; Wherein, described abnormity protection circuit is electrically connected with described console switch, connection circuit and drive circuit respectively; Described console switch also is electrically connected with described testing circuit and power circuit; Described connection circuit also is electrically connected with described drive circuit and testing circuit; Described drive circuit and testing circuit also are electrically connected with described control circuit respectively.
2. small household appliances protective device according to claim 1 is characterized in that described abnormity protection circuit comprises Thermal Cutoffs, resistance R 1 and bidirectional triode thyristor; Wherein, an end of described Thermal Cutoffs is connected with the zero line of described AC power, and the other end is coupled to described connection circuit; One end of described resistance R 1 is connected with the live wire of described AC power, and the other end is connected with the first anode of described bidirectional triode thyristor, and the second plate of described bidirectional triode thyristor is connected to described connection circuit, and its control utmost point is connected to described drive circuit.
3. small household appliances protective device according to claim 1 is characterized in that, described connection circuit comprises relay R Y1, resistance R 5 and diode D2; Wherein, the fixed contact of described relay R Y1 is connected to described abnormity protection circuit, its first moving contact ground connection, and its second moving contact is connected with described resistance R 5, and the other end of described resistance R 5 is connected to described console switch; One end of the coil of the anode of described diode D2 and relay R Y1 all is connected to described power circuit; The other end of the coil of the negative electrode of described diode D2 and relay R Y1 all is connected to described drive circuit.
4. small household appliances protective device according to claim 1 is characterized in that, described drive circuit comprises diode D1, resistance R 2, R3 and R4, reaches triode T1; Wherein, an end of described resistance R 3 is electrically connected with described control circuit, and the other end of described resistance R 3 is connected to an end of base stage and the described resistance R 4 of described triode T1; The other end ground connection of the emitter of described triode T1 and resistance R 4; The collector electrode of described triode T1 is connected to an end of described connection circuit and described resistance R 2; The other end of described resistance R 2 is connected to the negative electrode of described diode D1, and the anode of described diode D1 is connected to described abnormity protection circuit.
5. small household appliances protective device according to claim 1 is characterized in that described console switch is a single-pole double-throw switch (SPDT), its fixed contact ground connection, and its first moving contact is connected to described testing circuit, and its second moving contact is connected to described connection circuit.
6. small household appliances protective device according to claim 1 is characterized in that, described testing circuit comprises resistance R 7 and resistance R 6; Wherein, an end of described resistance R 7 is coupled to described power circuit, and the other end of described resistance R 7 is connected with an end of described resistance R 6 and both connected nodes are connected to described console switch, and the other end of described resistance R 6 is connected to described control circuit.
7. small household appliances comprise AC power in sequential series, power circuit and control circuit, it is characterized in that, are connected with protective device between described AC power and power circuit; Described protective device comprises abnormity protection circuit, console switch, connection circuit, drive circuit and testing circuit; Wherein, described abnormity protection circuit is electrically connected with described console switch, connection circuit and drive circuit respectively; Described console switch also is electrically connected with described testing circuit and power circuit; Described connection circuit also is electrically connected with described drive circuit and testing circuit; Described drive circuit and testing circuit also are electrically connected with described control circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202429894U CN201860082U (en) | 2010-06-30 | 2010-06-30 | Small home appliance and protection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202429894U CN201860082U (en) | 2010-06-30 | 2010-06-30 | Small home appliance and protection device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201860082U true CN201860082U (en) | 2011-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202429894U Expired - Lifetime CN201860082U (en) | 2010-06-30 | 2010-06-30 | Small home appliance and protection device thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN201860082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031004A (en) * | 2017-11-21 | 2018-05-15 | 安徽中盛溯源生物科技有限公司 | A kind of control method of skin multiple-head type microcurrent |
-
2010
- 2010-06-30 CN CN2010202429894U patent/CN201860082U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031004A (en) * | 2017-11-21 | 2018-05-15 | 安徽中盛溯源生物科技有限公司 | A kind of control method of skin multiple-head type microcurrent |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |
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| CX01 | Expiry of patent term |