CN2785220Y - Singlechip controlled electricity-proof wall equipment for electricity heating dryer - Google Patents
Singlechip controlled electricity-proof wall equipment for electricity heating dryer Download PDFInfo
- Publication number
- CN2785220Y CN2785220Y CN 200420019974 CN200420019974U CN2785220Y CN 2785220 Y CN2785220 Y CN 2785220Y CN 200420019974 CN200420019974 CN 200420019974 CN 200420019974 U CN200420019974 U CN 200420019974U CN 2785220 Y CN2785220 Y CN 2785220Y
- Authority
- CN
- China
- Prior art keywords
- ground wire
- processing unit
- central processing
- clothes dryer
- electric clothes
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Washing Machine And Dryer (AREA)
Abstract
The utility model discloses a universal electricity preventing wall device for an electric heating dryer controlled by a single chip computer, which belongs to the field of the technology application of the single chip computer, particularly to the electricity preventing wall technology which can protect personal safety when an earth wire of an electric heating dryer and the basic insulation fail simultaneously. The utility model is composed of a null and earth wire electrical potential difference detecting device, a central processing unit and a relay executive circuit which are electrically connected orderly. The utility model is mainly characterized in that a transformer or a resistance and capacity voltage reducing circuit is connected between the earth wire and the null wire, and the I/O input ports of the single chip computer are connected through a switch tube. The single chip computer receives the voltage difference signals between the null wire and the earth wire, and the earth wire and a power supply of the electric heating dryer are cut off in real time when the earth wire has electricity. The utility model is suitable for various controlling modes of various electric heating dryers, and the aim of the electricity preventing wall technology provided by the utility model is to protect the personal safety under the condition of unreliable earthing or failure of the earth wire.
Description
Anti-electric wall technology when technical field the invention belongs to microchip technology field and is particularly related to electric clothes dryer ground wire and basic insulation and lost efficacy simultaneously.
Background technology is well-known, and it must be reliably that the electric clothes dryer product standard requires ground connection, 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 clothes dryer 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, electric clothes dryer does not have the personal safety protector that cut off ground wire and electric clothes dryer 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 electric clothes dryer exists, providing a kind of had when this electric clothes dryer ground wire and basic insulation lost efficacy simultaneously, can cut off the power supply of ground wire and electric clothes dryer in real time, even under dangerous power utilization environment, also can guarantee user's safety.The relay circuit of the invention guarantees that simultaneously electric clothes dryer 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 electric clothes dryer 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 electric clothes dryer power supply.Under normal circumstances, the relay normally-closed contact is guaranteed ground wire E
IN, E
OUTAnd electric clothes dryer 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 clothes dryers 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 clothes dryer 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 electric clothes dryer 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 electric clothes dryer earth terminal; L
INBe live wire end of incoming cables, L
OUTBe the live wire leading-out terminal, promptly link to each other with electric clothes dryer 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 electric clothes dryer.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 electric clothes dryer L
INAnd L
OUT
Operation principle summary: electric clothes dryer 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 electric clothes dryer, 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 electric clothes dryer
OUT
2, the general electricity-preventing wall device of monolithic processor controlled electric clothes dryer 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 electric clothes dryer 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 electric clothes dryer power supply respectively.
4, the general electricity-preventing wall device of monolithic processor controlled electric clothes dryer 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 clothes dryer control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019974 CN2785220Y (en) | 2004-07-21 | 2004-07-21 | Singlechip controlled electricity-proof wall equipment for electricity heating dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019974 CN2785220Y (en) | 2004-07-21 | 2004-07-21 | Singlechip controlled electricity-proof wall equipment for electricity heating dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2785220Y true CN2785220Y (en) | 2006-05-31 |
Family
ID=36772181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019974 Expired - Fee Related CN2785220Y (en) | 2004-07-21 | 2004-07-21 | Singlechip controlled electricity-proof wall equipment for electricity heating dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2785220Y (en) |
-
2004
- 2004-07-21 CN CN 200420019974 patent/CN2785220Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2785220Y (en) | Singlechip controlled electricity-proof wall equipment for electricity heating dryer | |
| CN2785218Y (en) | Singlechip controlled electricity-proof wall equipment for electric iron | |
| CN2785224Y (en) | Singlechip controlled electricity- proof wall equipment for electric cookers | |
| CN2762413Y (en) | Universal shockproof wall device for electric fan controlled by one-chip machine | |
| CN2741246Y (en) | Monochip computer controlled shock-proof wall device of drinking machine | |
| CN2785223Y (en) | Singlechip controlled electricity-proof wall equipment for electric water jug | |
| CN2718876Y (en) | Universal anti-electric wall device for integrated kitchen controlled by one-chip processor | |
| CN2718875Y (en) | Universal anti electric wall device for ventilating fan controlled by one-chip processor | |
| CN2718877Y (en) | Universal anti-electric wall device for integrated bathroom controlled by one-chip processor | |
| CN2762412Y (en) | Universal shockproof wall device for surfing bathtube controlled by one-chip machine | |
| CN2724273Y (en) | General electricity proof wall device for electric heating water supply bathtub controlled by monolithic computer | |
| CN2724272Y (en) | General electricity proof wall device for electric heating water boiler controlled by monolithic computer | |
| CN2717381Y (en) | Universal anti-electric wall device for electric-heating dish-washing machine controlled by single chip processor | |
| CN1725588A (en) | Universal shock-proof wall device for electrothermal drier controlled by one chip machine | |
| CN2732245Y (en) | Single-chip microcomputer controlled universal anti-electricity wall for high-temperature electronic disinfecting cabinet | |
| CN2785219Y (en) | Singlechip controlled steam wave transforming stove electricity-proof wall device | |
| CN1599178A (en) | Universal shockproof wall device for electric cooker controlled by SCM | |
| CN1725587A (en) | Universal shock-proof wall device for electric iron controlled by single chip machine | |
| CN2692549Y (en) | Single-chip computer controlled heat storage type universal electricity-proof wall device for elcetric water heater | |
| CN1599176A (en) | Universal shockproof wall device for fan controlled by SCM | |
| CN2718872Y (en) | Universal anti-electric wall device for one-chip processer controlled electric body-building apparatus | |
| CN1599175A (en) | Universal shockproof wall device for electrical equipment controlled by SCM | |
| CN1588733A (en) | General electric proof wall device for monolithic processor controlled bath heater | |
| CN1599174A (en) | Universal shockproof wall device for electric kettle controlled by SCM apparatus | |
| CN100447329C (en) | SCM controlled universal electricity preventing wall apparatus for electric heating washing machine |
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 |