CN1554910A - General leakage preventing wall device for switch transistor controlled instant heating type electric water heater - Google Patents
General leakage preventing wall device for switch transistor controlled instant heating type electric water heater Download PDFInfo
- Publication number
- CN1554910A CN1554910A CNA2003101236988A CN200310123698A CN1554910A CN 1554910 A CN1554910 A CN 1554910A CN A2003101236988 A CNA2003101236988 A CN A2003101236988A CN 200310123698 A CN200310123698 A CN 200310123698A CN 1554910 A CN1554910 A CN 1554910A
- Authority
- CN
- China
- Prior art keywords
- water heater
- electric water
- ground wire
- present
- preventing wall
- 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.)
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- Control Of Resistance Heating (AREA)
Abstract
The present invention relates to the application of electronic technology application, and is especially leakage preventing wall technology for safety protection in case of failed ground line and basic insulation to make instant electric water heater charged. The present invention features that a transformer or RC voltage lowering circuit is connected between the ground line and zero line and to relay and controlling switching transistor, and the switching transistor receives the voltage difference signal between the ground line and zero line and cuts off the power supply timely in detecting charged ground line. The present invention provides protection against electric leakage. The present invention is suitable for various instant electric water heater and other apparatus with electric consumer.
Description
Anti-electric wall technology when technical field patent of the present invention belongs to the application of electronic technology field and is particularly related to heater ground wire and basic insulation and lost efficacy simultaneously.
The related instant electric water heater of background technology patent of the present invention is meant water is heated to on-fixed water-storage electric heater below the boiling point.As everyone knows, it must be reliably that instant electric water heater's 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 instant electric water heater 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 instant electric water heater 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 instant electric water heater 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 instant electric water heater 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, this installs by transformer T or capacitance-resistance R
1C
1Step-down, D
1～D
4Diode rectification, capacitor C
0, voltage-stabiliser tube DW and switching tube Q
0Form, be connected relay J with the relay executive circuit
1, J
2Normally-closed contact connect ground wire E respectively
INAnd E
OUT, live wire L
INAnd L
OUTQ when ground wire electrification
0To connected relay J
1, J
2Low level signal is provided, drives relay work, cut off the ground wire E that is serially connected in the relay normally-closed contact in real time
INAnd E
OUT, live wire L
INAnd L
OUT
Description of drawings 0 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: L with the heater earth terminal
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 that N is a zero line, 12V is the 12V dc source.
The operation principle summary: in the situation that Zai heater (Zhuan profit of the present invention is refered in particular to instant electric water heater's electric heating tube) Zai ground connection and basic insulation lost efficacy simultaneously, ground wire N is Yu zero line EINBetween voltage Zai 36V-220V between Zhi, be connected across ground wire Yu zero line EINOn transformer pressure-reducing circuit or Zu hold reduction voltage circuit and produce 1.5-6V DC pulse voltage by rectification circuit, make switching tube Q0Conducting, relay executive circuit Zhong Q0Be respectively J1、J
2Drive circuit. When the I/O output makes Q0During for low level, the actuating of relay disconnects the ground wire E that is connected on its normally-closed contactINAnd EOUTAnd the L of normally opened contact (being normally-closed contact during work)INAnd LOUT Cut off ground in real time Line EINWith live wire LIN。
Specific embodiment cross-over connection is in zero line N and ground wire E
INBetween potential difference detecting device by transformer T or capacitance-resistance electrical equipment R
1C
1(dotted portion) step-down, D
1～D
4Diode rectification, capacitor C
0, voltage-stabiliser tube DW and switching tube Q
0(present embodiment is 9013) formed.Switching tube Q
0Respectively with relay J
1J
2Link to each other relay J
1, J
2Normally-closed contact connects ground wire E
INAnd E
OUT, L
INAnd L
OUT
Claims (2)
1, the general electricity-preventing wall device of a kind of instant electric water heater of switch controlled, its principal character are to be provided with cross-over connection ground wire E
INAnd the potential difference detecting device between zero line N, this device is connected relay J with the relay executive circuit
1J
2Normally-closed contact connect ground wire E respectively
INAnd E
OUT, live wire L
INAnd L
OUT
2, the general electricity-preventing wall device of the instant electric water heater of switch controlled according to claim 1 is characterized in that cross-over connection ground wire E
INAnd the potential difference detecting device between zero line N is by transformer T or capacitance-resistance R
1C
1Step-down, D
1～D
4Diode rectification, capacitor C
0, voltage-stabiliser tube DW and switching tube Q
0Form.Q when ground wire electrification
0To connected relay J
1, J
2Low level signal is provided, drives relay work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101236988A CN1554910A (en) | 2003-12-21 | 2003-12-21 | General leakage preventing wall device for switch transistor controlled instant heating type electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101236988A CN1554910A (en) | 2003-12-21 | 2003-12-21 | General leakage preventing wall device for switch transistor controlled instant heating type electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1554910A true CN1554910A (en) | 2004-12-15 |
Family
ID=34338918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101236988A Pending CN1554910A (en) | 2003-12-21 | 2003-12-21 | General leakage preventing wall device for switch transistor controlled instant heating type electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1554910A (en) |
-
2003
- 2003-12-21 CN CNA2003101236988A patent/CN1554910A/en active Pending
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |