CN1601824A - Safety plug having abnormal temp raising alarm - Google Patents
Safety plug having abnormal temp raising alarm Download PDFInfo
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- CN1601824A CN1601824A CN 200410051981 CN200410051981A CN1601824A CN 1601824 A CN1601824 A CN 1601824A CN 200410051981 CN200410051981 CN 200410051981 CN 200410051981 A CN200410051981 A CN 200410051981A CN 1601824 A CN1601824 A CN 1601824A
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- temperature sensor
- plug
- utmost point
- overheating
- earth leakage
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Abstract
When abnormal temp rises, the safety plug is capable of making alarm and cutting off power automatically further. Thus, the safety plug prevents overheat caused by defect of contact, and provides function of earth leakage protection so as to prevent electric shock and electrical fire. Thus, a prewarning circuit composed of cascaded first temp sensor and acousto-optic alarm is connected between phase pole and zero pole in case of plug. When over temp protection or earth leakage protection are needed, then behind the said prewarning circuit, two pair of contacts and leakage protector including series circuit composed of second temp sensor and limiting resistor connected between input end of phase pole and output end of zero pole in parallel are installed. The invention is applicable to electrical household appliance widely.
Description
Technical field
The present invention relates to Electrical Safety resist technology field, particularly a kind of safety plug with overheating caution.
Background technology
Nearly all electrical equipment all is connected with power supply by plug, when the power ratio of electrical equipment during big or overload, particularly bad at socket connector, the contact resistance between plug, the socket will increase, and contact resistance just can produce during energising is enough to plug, socket are burnt mashed power loss.In case it is mashed that plug, socket burn, and except meeting allows the user touch the live part, also can produce intereelectrode short-circuit, causes the generation of electric shock injures and deaths and electrical fire accident.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of and effectively can reports to the police when overheating takes place or safety plug that further realization is cut off the electricity supply automatically; it not only can prevent to be burnt mashed because of plug, socket loose contact cause overheated plug, the socket of making; but also can have creepage protection function simultaneously, thereby the generation of more effectively prevent to get an electric shock injures and deaths and electrical fire accident.
Technical solution proposed by the invention is such: a kind of safety plug with overheating caution, comprise plug body phase, zero, three utmost point copper latch and lead-out wires thereof, between the inherent phase utmost point of described plug body and zero utmost point and be connected to an early warning circuit that is in series by the 1st temperature sensor harmony, light attention device.The normally open contact of described the 1st temperature sensor and indicator light and/or buzzer, current-limiting resistance series connection back and be connected in the plug mutually, between zero utmost point.The stage casing of the interior phase of described plug body, zero utmost point lead-out wire disconnects and connects a pair of contact respectively, and the second half section of this lead-out wire is also inserted earth leakage protective device, tripping mechanism interlock in described two pairs of contacts and the earth leakage protective device; The 2nd temperature sensor also is housed, and its normally open contact is with after current-limiting resistance is connected, and an end and described earth leakage protective device utmost point input mutually join, and the other end and described earth leakage protective device zero utmost point output joins.Described earth leakage protective device phase, zero utmost point input are parallel with power supply indicator.The switching mode temperature sensor that described the 1st temperature sensor and the 2nd temperature sensor all adopt the bimetal leaf material to make.Described the 2nd temperature sensor set temperature value is higher than the 1st temperature sensor set temperature value.
During work, when overheating arrived the early warning temperature, the 1st temperature sensor closure of switching mode was connected early warning circuit, and indicator light or buzzer send light or acoustical signal, remind the user to take measures, and powered-down and replacing socket prevent the generation of outer accident unexpectedly.One cover protection mechanism can also be housed in this plug to be used for cutting off the electricity supply automatically when overheating reaches the limit of temperature.Loop inductance and an earth leakage protective device that this protection mechanism is made up of the 2nd temperature sensor, current-limiting resistance; loop inductance strides across the zero-sequence transformer in the earth leakage protective device; be connected between phase utmost point input, zero utmost point output; when overheating reaches the limit of temperature; the 2nd temperature sensor closure of protection usefulness; produce a simulation residual operating current, drive the earth leakage protective device action, bipolar cutting off the electricity supply.Because the circuit that early warning is used is connected on the input front of this earth leakage protective device, not influenced by the earth leakage protective state.The loop inductance of protection usefulness is connected in the earth leakage protective device; like this after the temperature that reaches capacity makes earth leakage protective device action dropout outage; the early warning indication also can keep a period of time to send the signal of light or sound, and when temperature dropped near normal temperature, signal just extinguished.Because leak current fault causes outage and has only power supply indicator to extinguish, and the outage of overheating also can keep a period of time early warning indication, thereby can easily distinguish two kinds of different faults.
Compared with prior art, the remarkable result that the present invention produced is:
(1) is used for safety plug and the power line thereof that the outside band overheating that connects of electrical equipment is warned, no matter be because the electrical appliance power ratio is bigger, conduction time is long, perhaps cause the plug temperature rise too high because of overload, still cause plug and socket contact resistance to increase owing to socket is bad and cause overheating, before allowing to bear maximum temperature, the arrival plug all can send early warning signal, the caution user in time takes measures, if in time do not take measures, then meeting outage automatically when the arrival plug can be burnt mashed temperature, thereby it is mashed to ensure that plug can not burnt, and avoids the electric shock that causes therefrom, the generation of short circuit and fire incident.
(2) when early warning of this band overheating and the electric leakage of electrical appliance that overtemperature, leakage protecting plug connect, the earth leakage protective device action in the plug is cut off the electrical appliance power supply and is reached the earth leakage protective purpose.
(3) because the early warning indication also can keep a period of time,, thereby take relative counter measures after outage so that be easy to allow user and maintenance personal distinguish one from the other outage because overheated the causing of plug still is because of the electrical leakage fault causes.
(4) before the fault that causes the plug heating is not removed, can not recover to switch on, even the plug temperature has descended, also can only temporarily recover, must thoroughly remove fault, for example change bad socket, get rid of after the electrical equipment overload reason, just can recover normal power-up, guarantee the safety of user's lives and properties.
The present invention can be widely used in the electrical appliances such as household electrical appliance, household appliance as its power cord plug that is connected with external power supply.
Description of drawings
Fig. 1 is the structure principle chart of the safety plug embodiment of band overheating caution of the present invention.
Fig. 2 is the structure principle chart of band overheating of the present invention early warning and overtemperature, leakage protecting plug embodiment.
Fig. 3 is the structural representation that band overheating of the present invention early warning and overtemperature, leakage protecting plug are applied to an embodiment on the electric heater.
Embodiment
By following embodiment the present invention is further elaborated.
Embodiment 1
Referring to shown in Figure 1, one embodiment of the invention, the 1st temperature sensor 1, current-limiting resistance 3 that the safety plug of band overheating caution is used by zero utmost point copper latch 4, phase utmost point copper latch 5, earth electrode copper latch 6, plug body 7, indicator light 2, early warning and three heart yearns 13,14,15 that connect lead 16, extracting power supply cord are formed.Between the phase utmost point 5 (L) in plug body 7 and zero utmost point 4 (N) and be connected to the early warning circuit that is in series by the 1st temperature sensor 1 and indicator light 2, current-limiting resistance 3.Under the normal condition, the contact of the 1st temperature sensor 1 that early warning is used is often opened, early warning circuit disconnects, and indicator light 2 is not worked, when plug has overheating and arrive the temperature operating value of the 1st temperature sensor 1, the 1st temperature sensor 1 contact closure, connected early warning circuit, indicator light 2 is lighted and is sent light early warning indication, allows the user in time cut off the electricity supply, and change bad socket, prevent that further overheated burning from rotting plug.
Referring to shown in Figure 2; another embodiment of the present invention; band overheating early warning indication and overtemperature, leakage protecting plug; respectively be serially connected with a pair of silver contact 11,12 on phase, zero utmost point lead-out wire in this plug; the opening and closing of these two pairs of silver contacts 11,12 are operated, are controlled by earth leakage protective device 10, and the 2nd temperature sensor 8 of protection usefulness, current-limiting resistance 9 are connected to the phase utmost point input and zero utmost point output of earth leakage protective device 10 by lead 17.When overheating surpasses the early warning temperature and reaches the limit of temperature; the 2nd temperature sensor 8 action contact closure of protection usefulness; having a simulation leakage current from earth leakage protective device 10 phase utmost point inputs (L end) flows out; walk around earth leakage protective device 10 through current-limiting resistance the 9, the 2nd temperature sensor 8 and flow to its zero utmost point output (N end), at this moment, earth leakage protective device 10 actions; two pairs of silver contacts 11,12 disconnect immediately; power supply phase, zero utmost point lead-out wire are cut off simultaneously, and power supply indicator 20 extinguishes, and implements protection.Because the operating temperature of the 1st temperature sensor 1 that early warning is used is lower than the operating temperature of the 2nd temperature sensor 8 of protection usefulness; therefore the 1st temperature sensor 1 that early warning is used before implementing protection is closed earlier; early warning indicator light 2 sends early warning signal; after implementing protection; because early warning circuit is to be connected on two pairs of contacts 11; 12 fronts; therefore after the outage; early warning indicator light 2 can not extinguish immediately; only when temperature drops near normal temperature; when the contact of the 1st temperature sensor 1 that early warning is used recovers normal off-state; early warning indicator light 2 just can extinguish, that is to say that overheating arrives limit outage after, early warning indicator light 2 also can be through just extinguishing after a while.Because early warning indicator light 2 must just can be lighted luminous behind overheating, the outage that causes because of the electrical leakage fault is that power supply indicator 20 extinguishes, and early warning indicator light 2 is not irradiative, so just is easy to allow user or maintenance personal distinguish the reason of fault.This embodiment not only has creepage protection function, and can also prevent effectively that the burning of plug is mashed, more fully ensures user's safety, and package unit is mounted within the same shell 7.
Embodiment 3
Referring to shown in Figure 3, the present invention is applied in an embodiment on the electric heater.After phase in the power line, zero line 14,13 and ground wire 15 passed all-powerful leakage protection device 10, phase, zero line were connected to the load 18 of electric heater 19, and ground wire is connected to the shell of electric heater 19.Work as power connection, power supply indicator 20 is bright.When electric leakage takes place in electric heater load 18, occur residual current or ground wire 15 between phase, the zero line and have a mind to extrinsic current when flowing through, 10 actions of all-powerful leakage protection device are cut off the electricity supply, and power supply indicator 20 extinguishes.Overheating appears at the bad plug that causes of socket; when temperature arrives the early warning temperature; the contact closure of the 1st temperature sensor 1 that early warning is used, early warning indicator light 2 sends early warning light, if in time do not take measures; temperature continues to rise; during the value of reaching the limit of, the contact closure of the 2nd temperature sensor 8 of protection usefulness, the residual operating current of a simulation of appearance between phase, the zero line; all-powerful leakage protection device 10 is cut off the electricity supply immediately, and power supply indicator 20 extinguishes.Early warning this moment indicator light 2 still can keep luminous, and when plug was cooled near normal temperature, early warning recovered normal off-state with the contact of the 1st temperature sensor 1, and early warning indicator light 2 just can extinguish.Fault is not got rid of the energising that can not reset, and only fixing a breakdown (comprise and change bad socket) could operate as normal.The electric shock casualty accident that so not only can preventing leaks electricity causes, and stop the generation that plug is burnt the mashed back electric shock that takes place, short circuit, electrical fire accident.
Claims (6)
1, a kind of safety plug with overheating caution, comprise plug body, phase, zero, three utmost point copper latch and lead-out wires thereof, it is characterized in that: between the inherent phase utmost point of described plug body and zero utmost point and be connected to an early warning circuit that is in series by the 1st temperature sensor harmony, light attention device.
2, the safety plug with overheating caution according to claim 1 is characterized in that: the normally open contact of described the 1st temperature sensor and indicator light and/or buzzer, current-limiting resistance series connection back and be connected in the plug mutually, between the zero utmost point.
3, the safety plug with overheating caution according to claim 1, it is characterized in that: the stage casing disconnection of the interior phase of described plug body, zero utmost point lead-out wire also connects a pair of contact respectively, the second half section of this lead-out wire is also inserted earth leakage protective device, tripping mechanism interlock in described two pairs of contacts and the earth leakage protective device; The 2nd temperature sensor also is housed, and its normally open contact is with after current-limiting resistance is connected, and one end and described earth leakage protective device utmost point input mutually join, and the other end and described earth leakage protective device zero utmost point output joins.
4, the safety plug with overheating caution according to claim 1 is characterized in that: described earth leakage protective device phase, zero utmost point input are parallel with power supply indicator.
5, the safety plug with overheating caution according to claim 1 is characterized in that: the switching mode temperature sensor that described the 1st temperature sensor and the 2nd temperature sensor all adopt the bimetal leaf material to make.
6, according to claim 1 or 3 described safety plugs with overheating caution, it is characterized in that: described the 2nd temperature sensor set temperature value is higher than the 1st temperature sensor set temperature value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100519819A CN1317795C (en) | 2004-10-25 | 2004-10-25 | Safety plug having abnormal temp raising alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100519819A CN1317795C (en) | 2004-10-25 | 2004-10-25 | Safety plug having abnormal temp raising alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1601824A true CN1601824A (en) | 2005-03-30 |
| CN1317795C CN1317795C (en) | 2007-05-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100519819A Active CN1317795C (en) | 2004-10-25 | 2004-10-25 | Safety plug having abnormal temp raising alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1317795C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2446186A (en) * | 2007-01-30 | 2008-08-06 | Jonathan Champion | Electrical safety device |
| CN100517882C (en) * | 2006-01-10 | 2009-07-22 | 海尔集团公司 | Power plug with temperature monitoring function |
| CN100526887C (en) * | 2005-12-22 | 2009-08-12 | 海尔集团公司 | Electric power monitor for single phase AC electric device inspection and repair |
| GB2474245A (en) * | 2009-10-07 | 2011-04-13 | Alan Radford | Electrical safety device for electrical supply units |
| CN103227393A (en) * | 2012-12-27 | 2013-07-31 | 郑启文 | Intelligent alarm safety plug, socket, wall socket or adapter |
| US8736226B2 (en) | 2008-10-28 | 2014-05-27 | Panasonic Corporation | Charging cable, charging cable unit, and charging system for electric vehicle |
| CN103985998A (en) * | 2014-06-03 | 2014-08-13 | 常州市科宏电子电器有限公司 | Automatic temperature induction electronic plug-in |
| CN104868328A (en) * | 2015-06-08 | 2015-08-26 | 辽宁兴隆百货集团有限公司 | Temperature-control type fireproof safety socket |
| CN107482396A (en) * | 2017-07-18 | 2017-12-15 | 厦门鼎芯科技有限公司 | It is a kind of can monitoring of environmental humiture micro- rectangular electric connector |
| GB2551857A (en) * | 2016-06-29 | 2018-01-03 | Ynico Products Ltd | Safety Plug |
| CN109342873A (en) * | 2018-11-26 | 2019-02-15 | 杨卫珍 | A kind of metal-back electric equipment products electric leakage alarm device with self-checking function |
| CN111111073A (en) * | 2019-12-27 | 2020-05-08 | 甬港现代工程有限公司 | Automatic sprinkling fire extinguishing system |
| CN114824965A (en) * | 2022-06-27 | 2022-07-29 | 深圳市祥弘瑞科技有限公司 | USB concentrator that can accurate early warning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084665U (en) * | 1991-01-02 | 1991-09-11 | 丁建平 | Temp. control electric plug |
| CN2148404Y (en) * | 1992-05-20 | 1993-12-01 | 许申生 | Power supply plug base with temp. regulating switch arrangement |
| GB9305936D0 (en) * | 1993-03-22 | 1993-05-12 | B & R Electrical Plc | Connection device |
| JP2826722B2 (en) * | 1995-08-11 | 1998-11-18 | 尚眞 井戸坂 | Leak signal generator and electrical connector |
| CN2435861Y (en) * | 2000-08-22 | 2001-06-20 | 番禺旭东阪田电子有限公司 | Leakage protective plug with ultrahigh temp. protection |
| CN2739834Y (en) * | 2004-10-25 | 2005-11-09 | 刘锦泰 | Safety plug with abnormal temperature-rise warning |
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2004
- 2004-10-25 CN CNB2004100519819A patent/CN1317795C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100526887C (en) * | 2005-12-22 | 2009-08-12 | 海尔集团公司 | Electric power monitor for single phase AC electric device inspection and repair |
| CN100517882C (en) * | 2006-01-10 | 2009-07-22 | 海尔集团公司 | Power plug with temperature monitoring function |
| GB2446186A (en) * | 2007-01-30 | 2008-08-06 | Jonathan Champion | Electrical safety device |
| US8736226B2 (en) | 2008-10-28 | 2014-05-27 | Panasonic Corporation | Charging cable, charging cable unit, and charging system for electric vehicle |
| GB2474245A (en) * | 2009-10-07 | 2011-04-13 | Alan Radford | Electrical safety device for electrical supply units |
| GB2474245B (en) * | 2009-10-07 | 2013-05-15 | Alan Radford | Temperature Operated Electrical Safety Device for Electrical Supply Units |
| CN103227393A (en) * | 2012-12-27 | 2013-07-31 | 郑启文 | Intelligent alarm safety plug, socket, wall socket or adapter |
| CN103985998A (en) * | 2014-06-03 | 2014-08-13 | 常州市科宏电子电器有限公司 | Automatic temperature induction electronic plug-in |
| CN104868328A (en) * | 2015-06-08 | 2015-08-26 | 辽宁兴隆百货集团有限公司 | Temperature-control type fireproof safety socket |
| GB2551857A (en) * | 2016-06-29 | 2018-01-03 | Ynico Products Ltd | Safety Plug |
| CN107482396A (en) * | 2017-07-18 | 2017-12-15 | 厦门鼎芯科技有限公司 | It is a kind of can monitoring of environmental humiture micro- rectangular electric connector |
| CN109342873A (en) * | 2018-11-26 | 2019-02-15 | 杨卫珍 | A kind of metal-back electric equipment products electric leakage alarm device with self-checking function |
| CN111111073A (en) * | 2019-12-27 | 2020-05-08 | 甬港现代工程有限公司 | Automatic sprinkling fire extinguishing system |
| CN114824965A (en) * | 2022-06-27 | 2022-07-29 | 深圳市祥弘瑞科技有限公司 | USB concentrator that can accurate early warning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1317795C (en) | 2007-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Foshan Suncupid Electronic Factory Ltd. Assignor: Liu Jintai Contract fulfillment period: 2009.6.12 to 2024.10.24 contract change Contract record no.: 2009440000763 Denomination of invention: Safety plug having abnormal temp raising alarm Granted publication date: 20070523 License type: Exclusive license Record date: 2009.7.21 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.12 TO 2024.10.24; CHANGE OF CONTRACT Name of requester: FOSHAN ELECTRONICS FIY., LTD. Effective date: 20090721 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 528000 NO.10-1, SIZHI ROAD, FOSHAN CITY, GUANGDONG PROVINCE TO: 528000 FOSHAN SUNCUPID ELECTRONIC FACTORY CO., LTD., NO.10, SIZHI ROAD, CHANCHENG DISTRICT, FOSHAN CITY, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101224 Address after: The Silk Road Chancheng District Foshan city Guangdong province 528000 No. 10 Foshan xinjide Electronic Factory Co. Ltd. Patentee after: Liu Jintai Address before: 528000 No. 10 silk road, Guangdong, Foshan, China Patentee before: Liu Jintai |
|
| CI01 | Correction of invention patent gazette |
Correction item: Patentee Correct: Liu Ruigang|The Silk Road Chancheng District Foshan city Guangdong province 528000 No. 10 Foshan xinjide Electronic Factory Co. Ltd. False: Liu Jintai|The Silk Road Chancheng District Foshan city Guangdong province 528000 No. 10 Foshan xinjide Electronic Factory Co. Ltd. Number: 13 Volume: 21 |
|
| ERR | Gazette correction |
Free format text: CORRECT: PATENTEE; FROM: LIU JINTAI:528000 FOSHAN SUNCUPID ELECTRONIC FACTORY LTD., NO. 10, SIZHI ROAD, CHANCHENG DISTRICT, FOSHAN CITY, GUANGDONG PROVINCE TO: LIU RUIGANG:528000 FOSHAN SUNCUPID ELECTRONIC FACTORY LTD., NO. 10, SIZHI ROAD, CHANCHENG DISTRICT, FOSHAN CITY, GUANGDONG PROVINCE |