CN100447329C - SCM controlled universal electricity preventing wall apparatus for electric heating washing machine - Google Patents
SCM controlled universal electricity preventing wall apparatus for electric heating washing machine Download PDFInfo
- Publication number
- CN100447329C CN100447329C CNB2003101241083A CN200310124108A CN100447329C CN 100447329 C CN100447329 C CN 100447329C CN B2003101241083 A CNB2003101241083 A CN B2003101241083A CN 200310124108 A CN200310124108 A CN 200310124108A CN 100447329 C CN100447329 C CN 100447329C
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- CN
- China
- Prior art keywords
- electric heating
- processing unit
- central processing
- ground wire
- washing machine
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- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The present invention discloses an electricity-proof wall device generally used for an electric heating washing machine and controlled by a single chip computer, which belongs to the technical field of application of single chip computers and particularly relates to an electricity-proof wall technique for protecting human safety when a grounding wire of the electric heating washing machine and basic insulation are simultaneously ineffective. The present invention is mainly characterized in that a transformer or a capacitance-resistance voltage reducing circuit is connected to the space between the grounding wire and a zero wire and is connected with an I/O input port through a switching pipe; the voltage difference signals between the grounding wire and the zero wire are received by a single chip computer; the grounding wire and a heater power supply are cut in real time when the grounding wire supplied with power. The electricity-proof wall technique can protect the human safety under the condition of unreliable grounding or ineffective grounding wires; the present invention is suitable for various control modes and different heaters of various electric heating washing machines. The heater of the implementation example is particularly an electric heating pipe using mains supplies.
Description
Technical field
Anti-electric wall technology when the invention belongs to microchip technology field and is particularly related to heater ground wire and basic insulation and lost efficacy simultaneously.
Background technology
The related electric heating warming washing machine of the invention is meant the electric washer of the washing clothes of band hot-water heating system.
As everyone knows, it must be reliably that electric heating warming washing machine 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 electric heating warming washing machine 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, the electric heating warming washing machine does not have the personal safety protector that cut off ground wire and electric heating warming washing machine 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.
Summary of the invention
The purpose of the invention is exactly to overcome the shortcoming that the above-mentioned prior art of electric heating warming washing machine exists, providing a kind of had when this heater ground wire and basic insulation lost efficacy simultaneously, can cut off the power supply of ground wire and heater in real time, even under dangerous power utilization environment, also can guarantee user's safety.The relay circuit of the invention guarantees that simultaneously the electric heating warming washing machine 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 heating unit power 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 electrical appliance power supply.Under normal circumstances, the relay normally-closed contact is guaranteed ground wire E
IN, E
OUTAnd electrical appliance power supply L
IN, L
OUTConnection.
The advantage of the invention is simple in structure, and highly versatile is suitable for all kinds of electric heating warming washing machines and installs, and effect is obvious, does not influence the use under the ground wire normal condition, its central processing unit also can with electric heating warming washing machine 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 electrical equipment 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 heater earth terminal; L
INBe live wire end of incoming cables, L
OUTBe the live wire leading-out terminal, promptly link to each other with heater live wire end; N is a zero line, and 12V is the 12V dc source.
The specific 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 electric heating warming washing machine.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
o, voltage-stabiliser tube the DW mu balanced circuit and the switching tube Q that form
oForm switching tube Q
oBe 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 heater L
INAnd L
OUT
Operation principle summary: at heater (electric heating tube of electric heating warming washing machine is refered in particular in the invention) under the situation that ground connection and basic insulation lost efficacy simultaneously, ground wire N and zero line E
INBetween voltage between 36V-220V, cross-over connection is in ground wire and zero line 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
oConducting 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
Related electric heating warming Xian of the invention clothing machine is meant the electric washer of the washing clothes of band hot-water heating system, also is applicable to the electric washer of not being with hot-water heating system, dewater unit or clothes-drying device to need the washing clothes of good earth.
Claims (1)
1, the general electricity-preventing wall device of a kind of monolithic processor controlled electric heating warming washing machine, comprise the potential difference detecting device of cross-over connection between ground wire Ein and zero line N, it is characterized in that described potential difference detecting device is by transformer or resistance-capacitance circuit R1C1 step-down, the D1-D4 diode rectification, electric capacity, mu balanced circuit that voltage-stabiliser tube is formed and switching tube are formed, this potential difference detecting device output signal connects the I/O input port of central processing unit, provide potential difference signal between ground wire Ein and zero line N to central processing unit I/O input port, switching tube provides the low-level logic signal to central processing unit I/O input port when ground wire Ein is charged, central processing unit cuts off in real time and is connected on the ground wire Eout of relay normally-closed contact and the power supply Lout of heater by the break-make of I/O output port control relay executive circuit; Switching tube Q1, Q2 are controlled by the I/O output port of central processing unit in the relay executive circuit, and relay J 1, J2 are controlled by switching tube Q1, Q2 and control the break-make of ground wire Eout and heating unit power Lout respectively; Described central processing unit is a programmable microprocessor, separately setting or shared with the central processing unit in the electric heating warming control circuit of the washing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101241083A CN100447329C (en) | 2003-12-16 | 2003-12-16 | SCM controlled universal electricity preventing wall apparatus for electric heating washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101241083A CN100447329C (en) | 2003-12-16 | 2003-12-16 | SCM controlled universal electricity preventing wall apparatus for electric heating washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603506A CN1603506A (en) | 2005-04-06 |
| CN100447329C true CN100447329C (en) | 2008-12-31 |
Family
ID=34661440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101241083A Expired - Fee Related CN100447329C (en) | 2003-12-16 | 2003-12-16 | SCM controlled universal electricity preventing wall apparatus for electric heating washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100447329C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2105785U (en) * | 1991-12-14 | 1992-05-27 | 陈树辉 | Earthed leak-proof protector |
| CN2388756Y (en) * | 1999-08-04 | 2000-07-19 | 张宝明 | Digital phase and amplitude discriminating leakage protector |
| CN1433116A (en) * | 2002-09-29 | 2003-07-30 | 樱花卫厨（中国）有限公司 | Leakage protector circuit for electric water heater |
-
2003
- 2003-12-16 CN CNB2003101241083A patent/CN100447329C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2105785U (en) * | 1991-12-14 | 1992-05-27 | 陈树辉 | Earthed leak-proof protector |
| CN2388756Y (en) * | 1999-08-04 | 2000-07-19 | 张宝明 | Digital phase and amplitude discriminating leakage protector |
| CN1433116A (en) * | 2002-09-29 | 2003-07-30 | 樱花卫厨（中国）有限公司 | Leakage protector circuit for electric water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1603506A (en) | 2005-04-06 |
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|---|---|---|---|
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20100118 |