CN200953078Y - Immediate heating electric water heater live earth wire resisting controller - Google Patents
Immediate heating electric water heater live earth wire resisting controller Download PDFInfo
- Publication number
- CN200953078Y CN200953078Y CN 200620107780 CN200620107780U CN200953078Y CN 200953078 Y CN200953078 Y CN 200953078Y CN 200620107780 CN200620107780 CN 200620107780 CN 200620107780 U CN200620107780 U CN 200620107780U CN 200953078 Y CN200953078 Y CN 200953078Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- water heater
- earth wire
- potential difference
- electric water
- 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
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Abstract
This utility model discloses one control device against energization of earth wire of electric tankless water heater. It relates to one technology against energization of earth wire of electric tankless water heater. It is characterized in that one detector is installed between earth wire and neutral wire to detect zero potential difference. This potential difference detector consists of step-down circuit, rectifying circuit, voltage-stabilizing circuit and voltage-dividing circuit. The step-down circuit has a transformer for voltage drop. The detector of zero potential difference of earth wire outputs signals to the input port of the time base circuit. The output port of the time base circuit is connected to the control coil of relay. The normally closed contacts of relay control the connection and disconnection of earth wire and live wire. The technology against energization of earth wire involved in this utility model is expected to protect personal safety in case the earth wire and basic insulation of electric tankless water heater fail simultaneously.
Description
Technical field
The invention relates to a kind of instant electric water heater defense sector tape electric control technology.
Background technology
The instant electric water heater that the invention relates to is a kind of of electric heater.Electric heater is divided into heat storing type electric water heater and instant electric water heater by its water storage mode, and the instant electric water heater is meant with electric heating tube water is heated to on-fixed storage-type electric water heater below the boiling point.As everyone knows, it must be reliably that the electric heater 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 much regional in the China and the world, power utilization environment is poor, and the ground connection of many buildings is insecure, or even lack.In this case, qualified electric heater can not guarantee user's safety.Before the invention applying date, the electric heater product that comprises the instant electric water heater does not have the method protection personal safety of using this creation when ground wire and basic insulation lost efficacy simultaneously.
Summary of the invention
The purpose of the invention provides a kind of instant electric water heater defense sector tape controller for electric consumption, automatic fast shut-off power supply when being intended to instant electric water heater's ground wire and basic insulation and losing efficacy simultaneously, protection personal safety.The invention solves the technical scheme that its technical matters adopts: be connected to zero grounding potential difference detector set between ground wire and zero line.Described zero grounding potential difference detector set is made up of reduction voltage circuit, rectification circuit, is aided with mu balanced circuit and bleeder circuit; Described reduction voltage circuit is a transformer step-down mode; Its connected mode is: transformer is connected with the input end of rectification circuit, and the output terminal of rectification circuit is connected with bleeder circuit with mu balanced circuit, and the output signal of bleeder circuit is the output signal of zero grounding potential difference detector set; The output signal of described zero grounding potential difference detector set is connected with the input end of time base circuit, the time base circuit output terminal is connected with relay control coil by switching tube, the normally closed contact of relay connects the in-out end of ground wire and live wire respectively, the break-make of control ground wire and live wire.
The beneficial effect of the invention is: at instant electric water heater's ground wire and the basic insulation automatic fast shut-off power supply when being ground wire electrification that lost efficacy simultaneously, realize personal safety protection.
Description of drawings
Fig. 1 is the electrical schematic diagram of the invention.
Embodiment
Referring to Fig. 1.The invention is connected to zero grounding potential difference detector set at ground wire E and zero line N span.Described zero grounding potential difference detector set is made up of reduction voltage circuit, rectification circuit, is aided with mu balanced circuit and bleeder circuit.Described reduction voltage circuit is a transformer step-down mode, and T is a transformer.Present embodiment rectification circuit and mu balanced circuit are respectively by D
1-D
4With DW, C
0Form.Bleeder circuit is respectively by R
1And R
2Form.The output signal of zero grounding potential difference detector set is connected with the input end of time base circuit NE555, and the output terminal of time base circuit NE555 is connected with the control coil of relay J by switching tube; Time base circuit NE555 connects and is the monostable state.Ground wire E
INAnd E
OUT, live wire L
INAnd L
OUTBe serially connected in the normally closed contact J of relay J respectively
1, J
2Two ends, the normally closed contact J of relay J
1, J
2Two ends control the break-make of ground wire and live wire respectively.L is a live wire among the figure, and N is a zero line, and E is a ground wire, E
INAnd E
OUTEnd of incoming cables and the leading-out terminal of representing ground wire respectively.L
INAnd L
OUTEnd of incoming cables and the leading-out terminal of representing live wire respectively.The invention potential difference (PD) between ground wire E and zero line N reaches 36V safety electricity when above, zero grounding potential difference detector set A control time base circuit NE555 upset, and quick control is serially connected in relay J automatically
1, J
2The ground wire at normally closed contact two ends and live wire disconnect, when being implemented in instant electric water heater's ground wire and basic insulation and losing efficacy simultaneously to personal safety protection.
Claims (3)
1, a kind of instant electric water heater defense sector tape controller for electric consumption is characterized in that being connected to zero grounding potential difference detector set between ground wire and zero line.
2, instant electric water heater according to claim 1 defense sector tape controller for electric consumption is characterized in that described zero grounding potential difference detector set is made up of reduction voltage circuit, rectification circuit, is aided with mu balanced circuit and bleeder circuit; Described reduction voltage circuit is a transformer step-down mode; Its connected mode is: transformer is connected with zero line with ground wire respectively, primary coil is connected with the input end of rectification circuit, the output terminal of rectification circuit is connected with bleeder circuit with mu balanced circuit, and the output signal of bleeder circuit is the output signal of zero grounding potential difference detector set.
3, instant electric water heater according to claim 1 defense sector tape controller for electric consumption, the output signal that it is characterized in that described zero grounding potential difference detector set is connected with the input end of time base circuit, the time base circuit output terminal is connected with relay control coil by switching tube, and the normally closed contact of relay connects the in-out end of ground wire and live wire respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107780 CN200953078Y (en) | 2006-09-18 | 2006-09-18 | Immediate heating electric water heater live earth wire resisting controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107780 CN200953078Y (en) | 2006-09-18 | 2006-09-18 | Immediate heating electric water heater live earth wire resisting controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200953078Y true CN200953078Y (en) | 2007-09-26 |
Family
ID=38811378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620107780 Expired - Fee Related CN200953078Y (en) | 2006-09-18 | 2006-09-18 | Immediate heating electric water heater live earth wire resisting controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200953078Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614575A (en) * | 2015-01-21 | 2015-05-13 | 广东万家乐燃气具有限公司 | Audible and visual warning device for reminding electrified ground wire of electric water heater |
-
2006
- 2006-09-18 CN CN 200620107780 patent/CN200953078Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614575A (en) * | 2015-01-21 | 2015-05-13 | 广东万家乐燃气具有限公司 | Audible and visual warning device for reminding electrified ground wire of electric water heater |
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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 |