CN202888540U - Manual reset overload overtemperature protection plug with pre-warning function - Google Patents
Manual reset overload overtemperature protection plug with pre-warning function Download PDFInfo
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- CN202888540U CN202888540U CN 201220600789 CN201220600789U CN202888540U CN 202888540 U CN202888540 U CN 202888540U CN 201220600789 CN201220600789 CN 201220600789 CN 201220600789 U CN201220600789 U CN 201220600789U CN 202888540 U CN202888540 U CN 202888540U
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Abstract
The utility model discloses a manual reset overload overtemperature protection plug with a pre-warning function. The manual reset overload overtemperature protection plug comprises a power supply pin, an overload overtemperature protector and a load power cord, wherein the power supply pin comprises a live wire pin and a neutral wire pin; the live wire pin passes through the overload overtemperature protector and then is electrically connected with a live wire of the load power cord; and the neutral wire pin is electrically connected with a neutral wire of the load power cord. The manual reset overload overtemperature protection plug further comprises a PTC (positive temperature coefficient) and a pre-warning circuit, wherein the PTC and the overload overtemperature protector are connected in parallel, the PTC and the overload overtemperature protector are mounted together, and the heat produced by the PTC can be conducted to the overload overtemperature protector; and the pre-warning circuit is electrically connected between the live wire pin and the neutral wire pin, and the pre-warning temperature value of the pre-warning circuit is lower than the protection temperature value of the overload overtemperature protector. The manual reset overload overtemperature protection plug disclosed by the utility model can perform pre-warning in advance before overtemperature, so that a user can eliminate abnormality in advance when an overload overtemperature situation does not occur; and furthermore, the overload overtemperature protector can not be reset and connected automatically after the circuit is cut off, so that electrical appliances can be prevented from being damaged.
Description
Technical field
The utility model relates to a kind of attaching plug, particularly a kind of hand-reset overload overtemperature prote plug with warning function.
Background technology
Attaching plug (Power plug) spreads all over each corner of our life, television set, refrigerator, electric fan, air-conditioning etc. all need to use and must use attaching plug, various production equipments that factory uses the inside etc. all need attaching plug, in a word in short " where need electricity, where attaching plug just arranged ".The use of electrical equipment has its danger, if power consumption is excessive, then easily cause can't bear the heavy load of electrical appliance, power line or socket, gently then damage, heavy then cause disaster accident, therefore need to strengthen the safety of its electricity consumption in the use of power line and plug, yet in the prior art, attaching plug only has usually for electrical equipment provides and connects electric function.
Progress along with technology, people have designed the plug with the overload overheat protection function, for example: Chinese patent 03204261.2 discloses a kind of overload protecting plug, comprise a power line, one plug and an overload protective device, wherein power line comprises a live wire and a zero line, and plug comprises a live wire end pin and a zero line pin, and the zero line of this zero line side pin and this power line is electrically connected; And this overload protective device comprises a live wire contact site and a pin contact site, and the live wire of this live wire contact site and this power line is electrically connected, and the live wire end pin electrical contact of this pin contact site and this plug becomes the normality conducting; Overload protecting plug can bimetal leaf the flexural deformation characteristic, or the resistance value of semistor increase and decrease characteristic can not damaged because of super-high-current power line and socket, or makes the electrical appliance can be not impaired because of the generation of erratic current.
Yet there is more disappearance in actual applications in above-mentioned plug with the overload overheat protection function:
One, appliance power is excessive or the overload; and the bad problem of plug itself; if can in time find; mostly can in time be solved; yet above-mentioned plug with the overload overheat protection function does not but have warning function; it is unusual to tell in time more which kind of appears in the user, thereby the user can't also get rid of unusually in no appearance overload overtemperature situation in advance.
Two, because the overload Overtemp. protector is generally the bimetal leaf temperature protector, have auto-reset function, when temperature is high, bimetal leaf temperature protector automatic cut-off power, after temperature reduced, the bimetal leaf temperature protector recovered again the conducting of power supply automatically; So; above-mentioned with the overload overheat protection function plug in actual application; even appliance circuit is under the fault condition; plug also can make plug switch between cut-out circuit and connection circuit two states incessantly because of the auto-reset function of overload Overtemp. protector; so not only damage easily electric equipment, and can be because the overload Overtemp. protector generates electromagnetic waves reset the time and spark causes larger peril to occur.
The utility model content
The technical problems to be solved in the utility model is, for above-mentioned deficiency of the prior art, a kind of hand-reset overload overtemperature prote plug with warning function is provided, and this plug can give warning in advance before overtemperature, and it is unusual to make the user get rid of in advance when also the overload of appearance overtemperature situation; And the overload Overtemp. protector of this plug cuts off the connection circuit that can not automatically reset behind the circuit, thus the protection electric equipment avoid destroying, effectively avoid generating electromagnetic waves when repeatedly repeating to reset because of the overload Overtemp. protector and spark has an accident.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of hand-reset overload overtemperature prote plug with warning function, comprise power pin, overload Overtemp. protector and load power source line, described power pin comprises live wire pin and zero line pin; Described live wire pin is behind described overload Overtemp. protector, with the live wire electric connection of load power source line; The zero line of described zero line pin and described load power source line is electrically connected; Also comprise PTC and early warning circuit, described PTC is in parallel with described overload Overtemp. protector, and this PTC is installed in one with the overload Overtemp. protector, and the heat that PTC is produced can conduct to the overload Overtemp. protector; Described early warning circuit is electrically connected between the live wire pin and zero line pin of power pin, and the early warning temperature value of this early warning circuit is lower than the protection temperature value of overload Overtemp. protector.
As to further elaboration of the present utility model:
Described early warning circuit comprises often opens thermostat, dropping resistor, rectifier diode, alarm, and filter capacitor, and described thermostat, dropping resistor, rectifier diode and the alarm often opened is in series, and described filter capacitor and alarm are in parallel.
Further, described rectifier diode comprises the first rectifier diode and the second rectifier diode, and the first rectifier diode, alarm, the second rectifier diode are sequentially connected.Described alarm is LED lamp or buzzer.The resistance of described dropping resistor is 200 K Ω～400K Ω, is preferably 300K Ω, and the appearance value of described filter capacitor is 50 μ F～150 μ F, is preferably 100 μ F.Described PTC sticks together mutually with the overload Overtemp. protector.Described overload Overtemp. protector is the bimetal leaf temperature protector.
Further, described power pin also comprises earth pin, and described load power source line also comprises ground wire, and the ground wire of described earth pin and load power source line is electrically connected.
The beneficial effects of the utility model are:
(1) is electrically connected between the live wire pin and zero line pin of power pin owing to early warning circuit, and the early warning temperature value of early warning circuit is lower than the protection temperature value of overload Overtemp. protector, the conducting temperature value of namely often opening thermostat is lower than the break-off signal value of overload Overtemp. protector, therefore, when the plug temperature rises to the early warning temperature value of early warning circuit, often open the thermostat conducting, early warning circuit gives the alarm, make the user also not occur in the overload overtemperature situation, get rid of in advance unusual when namely not reaching the protection temperature value of overload Overtemp. protector; On the other hand, even if the user does not place oneself near plug, and can't know the alarm of plug the time, because plug also has overload Overtemp. protector circuit, thereby can not make plug burn mashed and the accidents such as breaking out of fire yet.
(2) overload Overtemp. protector of the present utility model is in parallel with PTC, and PTC and overload Overtemp. protector are installed in one, PTC is thermistor, when load and temperature are normal, the impedance of PTC is much larger than the impedance of overload Overtemp. protector, therefore, only from overload Overtemp. protector process, PTC is in the non operating state that no current passes through to electric current; And when plug overload or excess Temperature, the overload Overtemp. protector cuts off circuit, a small amount of electric current passes through from PTC, the PTC heating of working, its surface temperature maintains a higher temperature, meanwhile, PTC continues heat is conducted to the overload Overtemp. protector, make the temperature of overload Overtemp. protector also be in higher temperature all the time and can not automatically reset or resilience, keep lasting off-state, thereby the protection electric equipment is avoided destroying, and effectively avoids generating electromagnetic waves when repeating to reset because of the overload Overtemp. protector and spark has an accident; On the other hand, when the user needs the turn-on power plug, can pull out first plug or lay down load, wait for that then overload Overtemp. protector automatic cooling resets, the power supply that then plugs in again, attaching plug namely recovers the normally state;
When (3) overload Overtemp. protector of the present utility model is in lasting guard mode, plug or load temperature can reduce, when temperature was reduced to normal temperature and often opens under the early warning temperature value of thermostat, normal temperature is often held thermostat can return to off-state from closure state, and caution this moment can disappear; If plug or load temperature are not fallen, even manually allow the energising that resets of overload Overtemp. protector, because temperature still is higher than the early warning temperature value that normal temperature is often opened thermostat, therefore, warns and also can not disappear, unless cut off the electricity supply.
Description of drawings
Fig. 1 is the circuit diagram of the utility model preferred implementation.
Fig. 2 is the utility model perspective view.
Fig. 3 is the utility model structure front view, also comprises the circuit structure perspective view among the figure.
Fig. 4 is along the cutaway view of A-A line among Fig. 3.
Among the figure: 1. housing; 2. power pin; 21. live wire pin; 22. zero line pin; 23. earth pin; 3. alarm; 4. load power source line; 41. live wire; 42. zero line; 43. ground wire; 5. circuit case; 6. dropping resistor; 7. rectifier diode; 8. filter capacitor; 9. overload Overtemp. protector; 10. often open thermostat; 11.PTC.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are described in further detail.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the utility model is a kind of hand-reset overload overtemperature prote plug with warning function, comprise plug casing 1, this plug casing 1 is equipped with power pin 2, overload Overtemp. protector 9 and load power source line 4, and described power pin 2 comprises live wire pin 21 and zero line pin 22; Described live wire pin 21 is behind described overload Overtemp. protector 9, with live wire 41 electric connections of load power source line 4; Described zero line pin 22 is electrically connected with the zero line 42 of load power source line 4; Also comprise PTC 11 and early warning circuit, described PTC 11 is in parallel with described overload Overtemp. protector 9, and this PTC 11 is installed in one with overload Overtemp. protector 9, and the heat that PTC 11 is produced can conduct to overload Overtemp. protector 9; Described early warning circuit is electrically connected between the live wire pin 21 and zero line pin 22 of power pin 2, and the early warning temperature value of this early warning circuit is lower than the protection temperature value of overload Overtemp. protector 9.
Hold, because early warning circuit is electrically connected between the live wire pin 21 and zero line pin 22 of power pin 2, and the early warning temperature value of early warning circuit is lower than the protection temperature value of overload Overtemp. protector 9, the conducting temperature value of namely often opening thermostat 10 is lower than the break-off signal value of overload Overtemp. protector 9, therefore, when the plug temperature rises to the early warning temperature value of early warning circuit, often open thermostat 10 conductings, early warning circuit gives the alarm, make the user also in the overload of the appearance overtemperature situation, get rid of in advance unusual when namely not reaching the break-off signal value of transshipping Overtemp. protector 9; On the other hand, even if the user does not place oneself near plug, and can't know the alarm of plug the time, because plug also has overload Overtemp. protector circuit, thereby can not make plug burn mashed and the accidents such as breaking out of fire yet.Because overload Overtemp. protector 9 is in parallel with PTC 11, and PTC 11 is installed in one with overload Overtemp. protector 9, PTC 11 is thermistor, when load and temperature are normal, the impedance of PTC 11 is much larger than the impedance of overload Overtemp. protector 9, therefore, only from overload Overtemp. protector 9 processes, PTC 11 is in the non operating state that no current passes through to electric current; And when plug overload or excess Temperature, overload Overtemp. protector 9 cuts off circuit, a small amount of electric current passes through from PTC 11, PTC 11 work heatings, its surface temperature maintains a higher temperature, meanwhile, PTC 11 continues heat is conducted to overload Overtemp. protector 9, make the temperature of overload Overtemp. protector 9 also be in higher temperature all the time and can not automatically reset or resilience, keep lasting off-state, thereby the protection electric equipment is avoided destroying, and effectively avoids generating electromagnetic waves when repeating to reset because of overload Overtemp. protector 9 and spark has an accident; When the user needs the turn-on power plug, can pull out first plug or lay down load, wait for that then overload Overtemp. protector 9 automatic coolings reset, the power supply that then plugs in again, attaching plug namely recovers the normally state; When overload Overtemp. protector 9 of the present utility model is in lasting guard mode, plug or load temperature can reduce, when temperature was reduced to normal temperature and often opens under the early warning temperature value of thermostat 10, normal temperature is often held thermostat 10 can return to off-state from closure state, and caution this moment can disappear; If plug or load temperature are not fallen, even manually allow the energising that resets of overload Overtemp. protector 9, because temperature still is higher than the early warning temperature value that normal temperature is often opened thermostat 10, therefore, warns and also can not disappear, unless cut off the electricity supply.
Such as Fig. 1, Fig. 3 and shown in Figure 4; in technique scheme; described PTC 11 overload Overtemp. protectors 9 and early warning circuit are installed in the circuit case 5; described early warning circuit comprises often opens thermostat 10, dropping resistor 6, rectifier diode 7, alarm 3, and filter capacitor 8; described thermostat 10, dropping resistor 6, rectifier diode 7 and the alarm 3 often opened is in series, and described filter capacitor 8 is in parallel with alarm 3.Further, described rectifier diode 7 comprises the first rectifier diode and the second rectifier diode, and the first rectifier diode, alarm 5, the second rectifier diode are sequentially connected.Described alarm 3 is LED lamp or buzzer.The resistance of described dropping resistor 6 is 200 K Ω～400K Ω, is preferably 300K Ω, and described filter capacitor 8 adopts electrochemical capacitor, and its appearance value is 50 μ F～150 μ F, is preferably 100 μ F.Described PTC 11 sticks together mutually with overload Overtemp. protector 9.Described overload Overtemp. protector 9 is bimetal leaf temperature protector 9.Certainly; in the utility model; its current rectifying and wave filtering circuit is not limited to adopt two rectifier diodes and the mode that filter capacitor forms; also can adopt the circuit forms such as bridge rectifier filtering; described PTC 11 also can be integrated in the overload Overtemp. protector 9, makes the overload Overtemp. protector of a need hand-reset.In Fig. 1, J1 is power pin, and J2 is the load power source line, and T1 is the overload Overtemp. protector, and T2 is for often opening thermostat, and D1, D3 are rectifier diode, and R1 is that dropping resistor, C1 are filter capacitor, and D2 is alarm, and when D2 was LED, it was bright to send red blue flash.
Such as Fig. 2, Fig. 3 and shown in Figure 4; optimal way as the overload overtemperature prote plug that this is had warning function; described power pin 2 also comprises earth pin 23, and described load power source line 4 also comprises ground wire 43, and described earth pin 23 is electrically connected with the ground wire 43 of load power source line 4.
The above only is the utility model preferred embodiments, and every any trickle modification, equivalent variations and modification of above execution mode being done according to the technical solution of the utility model all belongs in the scope of technical solutions of the utility model.
Claims (10)
1. have the hand-reset overload overtemperature prote plug of warning function, comprise power pin, overload Overtemp. protector and load power source line, described power pin comprises live wire pin and zero line pin; Described live wire pin is behind described overload Overtemp. protector, with the live wire electric connection of load power source line; The zero line of described zero line pin and described load power source line is electrically connected; It is characterized in that: also comprise PTC and early warning circuit, described PTC is in parallel with described overload Overtemp. protector, and this PTC is installed in one with the overload Overtemp. protector, and the heat that PTC is produced can conduct to the overload Overtemp. protector; Described early warning circuit is electrically connected between the live wire pin and zero line pin of power pin, and the early warning temperature value of this early warning circuit is lower than the protection temperature value of overload Overtemp. protector.
2. the hand-reset overload overtemperature prote plug with warning function according to claim 1; it is characterized in that: described early warning circuit comprises often opens thermostat, dropping resistor, rectifier diode, alarm, and filter capacitor; described thermostat, dropping resistor, rectifier diode and the alarm often opened is in series, and described filter capacitor and alarm are in parallel.
3. the hand-reset overload overtemperature prote plug with warning function according to claim 2; it is characterized in that: described rectifier diode comprises the first rectifier diode and the second rectifier diode, and the first rectifier diode, alarm, the second rectifier diode are sequentially connected.
4. the hand-reset overload overtemperature prote plug with warning function according to claim 2, it is characterized in that: described alarm is the LED lamp.
5. the hand-reset overload overtemperature prote plug with warning function according to claim 2, it is characterized in that: described alarm is buzzer.
6. the hand-reset overload overtemperature prote plug with warning function according to claim 2, it is characterized in that: the resistance of described dropping resistor is 200 K Ω～400K Ω, the appearance value of described filter capacitor is 50 μ F～150 μ F.
7. the hand-reset overload overtemperature prote plug with warning function according to claim 6, it is characterized in that: the resistance of described dropping resistor is 300K Ω, the appearance value of described filter capacitor is 100 μ F.
8. the hand-reset overload overtemperature prote plug with warning function according to claim 1 is characterized in that: described PTC with transship Overtemp. protector and stick together mutually.
9. the hand-reset overload overtemperature prote plug with warning function according to claim 1, it is characterized in that: described overload Overtemp. protector is the bimetal leaf temperature protector.
10. the described hand-reset overload overtemperature prote plug with warning function of any one according to claim 1～9; it is characterized in that: described power pin also comprises earth pin; described load power source line also comprises ground wire, and the ground wire of described earth pin and load power source line is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220600789 CN202888540U (en) | 2012-11-15 | 2012-11-15 | Manual reset overload overtemperature protection plug with pre-warning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220600789 CN202888540U (en) | 2012-11-15 | 2012-11-15 | Manual reset overload overtemperature protection plug with pre-warning function |
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| Publication Number | Publication Date |
|---|---|
| CN202888540U true CN202888540U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220600789 Expired - Fee Related CN202888540U (en) | 2012-11-15 | 2012-11-15 | Manual reset overload overtemperature protection plug with pre-warning function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014082604A1 (en) * | 2012-11-30 | 2014-06-05 | 东莞市凯恩电子科技有限公司 | Manually reset overload and overtemperature prewarning and protection plug |
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2012
- 2012-11-15 CN CN 201220600789 patent/CN202888540U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014082604A1 (en) * | 2012-11-30 | 2014-06-05 | 东莞市凯恩电子科技有限公司 | Manually reset overload and overtemperature prewarning and protection plug |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160321 Granted publication date: 20130417 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160921 Granted publication date: 20130417 |
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| PP01 | Preservation of patent right |
Effective date of registration: 20160921 Granted publication date: 20130417 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170921 Granted publication date: 20130417 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20151115 |