CN1553550A - Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control - Google Patents
Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control Download PDFInfo
- Publication number
- CN1553550A CN1553550A CNA2003101239844A CN200310123984A CN1553550A CN 1553550 A CN1553550 A CN 1553550A CN A2003101239844 A CNA2003101239844 A CN A2003101239844A CN 200310123984 A CN200310123984 A CN 200310123984A CN 1553550 A CN1553550 A CN 1553550A
- Authority
- CN
- China
- Prior art keywords
- ground wire
- processing unit
- central processing
- electric heating
- dishwasher
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The invention belongs to application area of singlechip technique, especially, technique of antielectricity wall in order to protect personal safety in case of both ground wire of electrothermal heating unit for heating dishwasher and basic insulation is disabled. Main characters are that transformer or resistance-capacitance step-down circuit is connected between ground wire and zero line; switching tube is connected to I/O ports of the singlechip. The singlechip receives signal of potential difference between ground wire and zero line. When ground wire is electrified, the singlechip cuts off power source of the ground wire and heating unit. The invention is applicable to each kind of electrothermal dishwasher.
Description
Anti-electric wall technology when technical field patent of the present invention belongs to microchip technology field and is particularly related to heater ground wire and basic insulation and lost efficacy simultaneously.
Background technology
As everyone knows, it must be reliably that electric heating warming dishwasher 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 dishwasher can not guarantee user's safety.The anti-electric wall technology that patent of the present invention relates to is special in China's actual conditions, is intended to guarantee under unsafe power utilization environment user's safety.And in patent application of the present invention a few days ago, the electric heating warming dishwasher does not have the personal safety protector that cut off ground wire and heating unit power 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 patent of the present invention is exactly to overcome the shortcoming that the above-mentioned prior art of electric heating warming dishwasher 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 patent of the present invention guarantees that simultaneously the electric heating warming dishwasher recovers or do not influence normal use when ground wire is not charged.
Patent of the present invention solves the technical scheme that its technical problem adopts: patent of the present 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 patent of the present invention is simple in structure, and highly versatile is suitable for all kinds of electric heating warming dishwashers 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 dishwasher single chip machine controlling circuit shared resource.
Description of drawings Fig. 1 is the circuit structure block diagram of patent of the present 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 patent of the present 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 power supply.
Embodiment patent working example of the present invention 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 dishwasher.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 heater L
INAnd L
OUT
Operation principle summary: at heater (patent of the present invention is refered in particular to the electric heating tube of electric heating warming dishwasher) 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
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 electric heating warming dishwasher, 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 heater
OUT
2, the general electricity-preventing wall device of monolithic processor controlled electric heating warming dishwasher according to claim 1 is characterized in that cross-over connection is in ground wire N and zero line 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 electric heating warming dishwasher according to claim 1 is characterized in that (a) central processing unit (2) is a programmable microprocessor; (b) ground wire N and zero line 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 heating unit power respectively.
4, the general electricity-preventing wall device of monolithic processor controlled electric heating warming dishwasher 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 electric heating warming dishwasher control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101239844A CN1553550A (en) | 2003-12-18 | 2003-12-18 | Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101239844A CN1553550A (en) | 2003-12-18 | 2003-12-18 | Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1553550A true CN1553550A (en) | 2004-12-08 |
Family
ID=34338940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101239844A Pending CN1553550A (en) | 2003-12-18 | 2003-12-18 | Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1553550A (en) |
-
2003
- 2003-12-18 CN CNA2003101239844A patent/CN1553550A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1553550A (en) | Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control | |
| CN2732245Y (en) | Single-chip microcomputer controlled universal anti-electricity wall for high-temperature electronic disinfecting cabinet | |
| CN2717381Y (en) | Universal anti-electric wall device for electric-heating dish-washing machine controlled by single chip processor | |
| CN2785223Y (en) | Singlechip controlled electricity-proof wall equipment for electric water jug | |
| CN2785224Y (en) | Singlechip controlled electricity- proof wall equipment for electric cookers | |
| CN100447329C (en) | SCM controlled universal electricity preventing wall apparatus for electric heating washing machine | |
| CN2741246Y (en) | Monochip computer controlled shock-proof wall device of drinking machine | |
| CN2785220Y (en) | Singlechip controlled electricity-proof wall equipment for electricity heating dryer | |
| CN2718876Y (en) | Universal anti-electric wall device for integrated kitchen controlled by one-chip processor | |
| CN2785218Y (en) | Singlechip controlled electricity-proof wall equipment for electric iron | |
| CN2718875Y (en) | Universal anti electric wall device for ventilating fan controlled by one-chip processor | |
| CN1554909A (en) | General leakage preventing wall device for monolithic processor controlled forced exhausting gas water heater | |
| CN1599175A (en) | Universal shockproof wall device for electrical equipment controlled by SCM | |
| CN2762412Y (en) | Universal shockproof wall device for surfing bathtube controlled by one-chip machine | |
| CN1599178A (en) | Universal shockproof wall device for electric cooker controlled by SCM | |
| CN2718877Y (en) | Universal anti-electric wall device for integrated bathroom controlled by one-chip processor | |
| CN2724273Y (en) | General electricity proof wall device for electric heating water supply bathtub controlled by monolithic computer | |
| CN1556571A (en) | Universal anti-electrc wall device of electric stove and similar appliance controlled by single chip machine | |
| CN1599174A (en) | Universal shockproof wall device for electric kettle controlled by SCM apparatus | |
| CN2724272Y (en) | General electricity proof wall device for electric heating water boiler controlled by monolithic computer | |
| CN2718872Y (en) | Universal anti-electric wall device for one-chip processer controlled electric body-building apparatus | |
| CN1588733A (en) | General electric proof wall device for monolithic processor controlled bath heater | |
| CN1599176A (en) | Universal shockproof wall device for fan controlled by SCM | |
| CN1554897A (en) | General leakage preventing wall device for monolithic processor controlled household fume exhaust fan | |
| CN1588732A (en) | General electric proof wall device for monolithic processor controlled air exchanging fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |