CN2785223Y - Singlechip controlled electricity-proof wall equipment for electric water jug - Google Patents
Singlechip controlled electricity-proof wall equipment for electric water jug Download PDFInfo
- Publication number
- CN2785223Y CN2785223Y CN 200420077372 CN200420077372U CN2785223Y CN 2785223 Y CN2785223 Y CN 2785223Y CN 200420077372 CN200420077372 CN 200420077372 CN 200420077372 U CN200420077372 U CN 200420077372U CN 2785223 Y CN2785223 Y CN 2785223Y
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- CN
- China
- Prior art keywords
- ground wire
- processing unit
- central processing
- insulating pot
- utility
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a single chip computer control electricity-proof wall device for an electric water jug, which belongs to the single chip computer technology application field. The utility model particularly relates to the electric-proof wall technology, the aim of which is to protect the personal safety when the ground wire and the basic insulation of the electric water jug simultaneously fail. The utility model is formed by that a zero ground wire potential difference detection device, a central processing unit and a relay executive circuit are orderly and electrically connected. The utility model is mainly characterized in that a transformer or a resistance-capacitance voltage reducing circuit is connected between a ground wire and a zero wire and is connected with an I/O input port of a single chip computer through a switch pipe. The single chip computer is used for receiving voltage difference signals between the zero wire and the ground wire, and the ground wire and the power supply of the electric water jug are cut off in real time when the ground wire is electrified. The utility model is suitable for various control modes of various electric water jugs. The utility model relates to the electricity-proof wall technology, the aim of which is to protect the personal safety under the environment that the ground wire is unreliable or the ground wire fails.
Description
Anti-electric wall technology when technical field the invention belongs to microchip technology field and is particularly related to insulating pot ground wire and basic insulation and lost efficacy simultaneously.
Background technology is well-known, and it must be reliably that the insulating pot product standard requires the ground connection in the user family, and the standard plug that the band ground wire also is housed in its product is for linking to each other good with assurance ground connection with ground wire in the socket.And in China, power utilization environment is poor, and the ground connection of many buildings is insecure, or even lack.In this case, qualified insulating pot can not guarantee user's safety.The anti-electric wall technology that the invention relates to is special in China's actual conditions, is intended to guarantee under unsafe power utilization environment user's safety.And before the invention applying date, insulating pot does not have the personal safety protector that cut off ground wire and insulating pot power supply when ground wire and basic insulation lost efficacy simultaneously in real time, brings potential safety hazard for the user who does not have good earth.
The purpose of summary of the invention the invention is exactly to overcome the shortcoming that the above-mentioned prior art of insulating pot exists, providing a kind of had when this insulating pot ground wire and basic insulation lost efficacy simultaneously, can cut off the power supply of ground wire and insulating pot in real time, even under dangerous power utilization environment, also can guarantee user's safety.The relay circuit of the invention guarantees that simultaneously insulating pot recovers or do not influence normal use when ground wire is not charged.
The invention solves the technical scheme that its technical problem adopts: the invention is provided with cross-over connection in ground wire E
INAnd the potential difference detecting device between zero line N (1), this device provides ground wire normal or charged logical signal to central processing unit (2) I/O input port, and central processing unit (2) is by the break-make of I/O output port control relay executive circuit.Relay executive circuit (3) is by drive circuit Q
1, Q
2And relay J
1, J
2Form, be serially connected with ground wire E respectively at its normally-closed contact, normally opened contact
IN, E
OUTAnd insulating pot power supply L
IN, L
OUTRelay executive circuit (3) is controlled by central processing unit (2), cuts off being serially connected in relay J when ground wire electrification
1, J
2Ground wire and insulating pot power supply.Under normal circumstances, the relay normally-closed contact is guaranteed ground wire E
IN,, E
OUTAnd insulating pot power supply L
IN, L
OUTConnection.
The advantage of the invention is simple in structure, and highly versatile is suitable for all kinds of insulating pots and installs, and effect is obvious, does not influence the use under the ground wire normal condition, its central processing unit also can with insulating pot single chip machine controlling circuit shared resource.
Description of drawings Fig. 1 is the circuit structure block diagram of the invention.Wherein (1) is that zero grounding potential difference detector set (2) is central processing unit, and (3) carry out insulating pot for relay.
Fig. 2 is the electrical schematic diagram of the invention.E among the figure
INBe ground wire end of incoming cables, E
OUTBe the ground wire leading-out terminal, promptly link to each other with the insulating pot earth terminal; L
INBe live wire end of incoming cables, L
OUTBe the live wire leading-out terminal, promptly link to each other with insulating pot live wire end; N is a zero line, and 12V is the 12V DC power supply.
Embodiment the invention embodiment central processing unit adopts PIC16C54 (PIC16C57) chip microprocessor able to programme, and as previously mentioned, this chip microprocessor can be shared with the single chip machine controlling circuit of insulating pot.Cross-over connection is in zero line N and ground wire E
INBetween potential difference detecting device by transformer T or resistance-capacitance circuit R
1C
1(among Fig. 2 shown in the dotted line) step-down, D
1～D
4Diode rectification, capacitor C
0, voltage-stabiliser tube the DW voltage stabilizing circuit and the switching tube Q that form
0Form switching tube Q
0Be connected in central processing unit I/O input port, I/O output port control relay executive circuit Q
1, Q
2, J
1, J
2The relay normally-closed contact connects ground wire E
INAnd E
OUT, normally opened contact connects insulating pot L
INAnd L
OUT
Operation principle summary: insulating pot under the situation that ground connection and basic insulation lost efficacy simultaneously, zero line N and ground wire E
INBetween voltage between 36V-220V, cross-over connection is in zero line N and ground wire E
INOn transformer reduction voltage circuit or resistance-capacitance depressurization circuit produce the 1.5-6V dc pulse voltage by rectification circuit, make switching tube Q
0Conducting is to central processing unit output low level signal.Q in the relay executive circuit
1, Q
2Be respectively J
1, J
2Drive circuit.When the I/O output makes Q
1Or Q
2During for low level, the actuating of relay disconnects the ground wire E that is connected on its normally-closed contact
INAnd E
OUTAnd the L of normally opened contact (being normally-closed contact during work)
INAnd L
OUT
Claims (4)
1, the general electricity-preventing wall device of a kind of monolithic processor controlled insulating pot, its principal character is the potential difference detecting device (1) that is provided with between cross-over connection ground wire E and zero line N, this device provides potential difference signal between ground wire and zero line to central processing unit (2) I/O input port, central processing unit (2) cuts off the ground wire E that is connected on the relay normally-closed contact in real time by the break-make of I/O output port control relay executive circuit (3) when ground wire electrification
OUTAnd the power supply L of insulating pot
OUT
2, the general electricity-preventing wall device of monolithic processor controlled insulating pot according to claim 1 is characterized in that cross-over connection is in zero line N and ground wire E
INBetween potential difference detecting device (1) by transformer T or resistance-capacitance circuit R
1C
1Step-down, D
1～D
4Diode rectification, capacitor C
0, voltage-stabiliser tube the DW voltage stabilizing circuit and the switching tube Q that form
0Form switching tube Q when ground wire electrification
0Provide logical signal (present embodiment is a low level) to central processing unit (2) I/O input port.
3, the general electricity-preventing wall device of monolithic processor controlled insulating pot according to claim 1 is characterized in that (a) central processing unit (2) is a programmable microprocessor; (b) zero line N and ground wire E
INBetween potential difference detecting device (1) output signal connect the I/O input port of central processing unit (2); (c) switching tube Q in the relay executive circuit (3)
1, Q
2The I/O output port that is controlled by central processing unit (2), relay J
1, J
2Be controlled by switching tube Q
1, Q
2And control the break-make of ground wire and insulating pot power supply respectively.
4, the general electricity-preventing wall device of monolithic processor controlled insulating pot according to claim 1, it is characterized in that described central processing unit (2) can be provided with separately also can with the central processing unit shared resource in the insulating pot control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420077372 CN2785223Y (en) | 2004-07-26 | 2004-07-26 | Singlechip controlled electricity-proof wall equipment for electric water jug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420077372 CN2785223Y (en) | 2004-07-26 | 2004-07-26 | Singlechip controlled electricity-proof wall equipment for electric water jug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2785223Y true CN2785223Y (en) | 2006-05-31 |
Family
ID=36772184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420077372 Expired - Fee Related CN2785223Y (en) | 2004-07-26 | 2004-07-26 | Singlechip controlled electricity-proof wall equipment for electric water jug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2785223Y (en) |
-
2004
- 2004-07-26 CN CN 200420077372 patent/CN2785223Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |