CN200997519Y - Electric controller against earth wire for instant-heating electric heater - Google Patents
Electric controller against earth wire for instant-heating electric heater Download PDFInfo
- Publication number
- CN200997519Y CN200997519Y CN 200620107279 CN200620107279U CN200997519Y CN 200997519 Y CN200997519 Y CN 200997519Y CN 200620107279 CN200620107279 CN 200620107279 CN 200620107279 U CN200620107279 U CN 200620107279U CN 200997519 Y CN200997519 Y CN 200997519Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- potential difference
- zero
- output signal
- difference detector
- 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
Abstract
An instant electric water heater ground-proof live control device is characterized in that a zero ground line potential difference detection device, of which an output signal is connected with an input terminal of an op-amp circuit, is connected between a ground line and a zero line. The other input terminal of the op-amp circuit is connected with a reference voltage, and the output terminal of the op-amp circuit is connected with the control coil of the relay. A NC contact of the relay is respectively connected with the ground line and the live line.
Description
Technical field the invention relates to a kind of instant electric water heater defense sector tape electric control technology.
The instant electric water heater that background technology 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.Present in the invention application, the electric heater product that comprises the instant electric water heater does not have the method protection personal safety of using this creation when earth connection and basic insulation lost efficacy simultaneously.
The purpose of summary of the invention 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 earth connection and basic insulation and losing efficacy simultaneously, protection personal safety.
The invention solves the technical scheme that its technical problem 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 voltage stabilizing circuit and bleeder circuit; Described reduction voltage circuit is a capacitance-resistance device step-down mode; Its connected mode is: the capacitance-resistance device is connected in series mutually with input, ground wire and the zero line of rectification circuit, and the output of rectification circuit is connected with bleeder circuit with voltage stabilizing circuit, and the output signal of bleeder circuit is the output signal of zero grounding potential difference detector set; When not connecing voltage stabilizing circuit, the output of voltage stabilizing 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 an input of discharge circuit, another input of discharge circuit is connected with reference voltage, the discharge circuit output is connected with relay control coil by switching tube, the normally-closed contact of relay connects 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 earth connection 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 is referring to Fig. 1.The invention is connected to zero grounding potential difference detector set A at ground wire E and zero line N span.Described zero grounding potential difference detector set A is made up of reduction voltage circuit, rectification circuit, is aided with voltage stabilizing circuit and bleeder circuit.Described reduction voltage circuit is a capacitance-resistance device step-down mode, and RC is the capacitance-resistance device.Present embodiment rectification circuit and voltage stabilizing circuit are respectively by D
1-D
4With DW, C
0Form.Bleeder circuit is respectively by R
1And R
2Form.Also can adopt the half-wave and the full-wave rectification of other form among other embodiment or exempt to connect voltage stabilizing circuit and bleeder circuit.The output signal of zero grounding potential difference detector set A is connected with the input of discharge circuit AJ, and another input of discharge circuit AJ is connected with reference voltage, and discharge circuit is connected with the control coil of relay J by switching tube; 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 between ground wire E and zero line N reaches 36V safety electricity when above, zero grounding potential difference detector set A control discharge circuit AJ, 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 earth connection and basic insulation and losing efficacy simultaneously to personal safety protection.
Claims (2)
1, a kind of instant electric water heater defense sector tape controller for electric consumption, it is characterized in that being connected to zero grounding potential difference detector set between ground wire and zero line, the output signal of this device is connected with an input of discharge circuit, another input of discharge circuit is connected with reference voltage, the discharge circuit output is connected with relay control coil, and the normally-closed contact of relay connects ground wire and live wire respectively.
2, a kind of 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 voltage stabilizing circuit and bleeder circuit; Described reduction voltage circuit is a transformer step-down mode; Its connected mode is: the primary coil of transformer reduction voltage circuit is connected with zero line with ground wire, secondary coil is connected with the input of rectification circuit, the output of rectification circuit is connected with bleeder circuit with voltage stabilizing circuit, and the output signal of bleeder circuit is the output signal of zero grounding potential difference detector set; When not connecing voltage stabilizing circuit, the output of voltage stabilizing circuit is the output signal of zero grounding potential difference detector set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107279 CN200997519Y (en) | 2006-08-31 | 2006-08-31 | Electric controller against earth wire for instant-heating electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107279 CN200997519Y (en) | 2006-08-31 | 2006-08-31 | Electric controller against earth wire for instant-heating electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200997519Y true CN200997519Y (en) | 2007-12-26 |
Family
ID=38995954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620107279 Expired - Fee Related CN200997519Y (en) | 2006-08-31 | 2006-08-31 | Electric controller against earth wire for instant-heating electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200997519Y (en) |
-
2006
- 2006-08-31 CN CN 200620107279 patent/CN200997519Y/en not_active Expired - Fee Related
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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 |