CN200997068Y - Electric controller against grounding wire for regenerative electric heater - Google Patents
Electric controller against grounding wire for regenerative electric heater Download PDFInfo
- Publication number
- CN200997068Y CN200997068Y CN 200620107280 CN200620107280U CN200997068Y CN 200997068 Y CN200997068 Y CN 200997068Y CN 200620107280 CN200620107280 CN 200620107280 CN 200620107280 U CN200620107280 U CN 200620107280U CN 200997068 Y CN200997068 Y CN 200997068Y
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- China
- Prior art keywords
- circuit
- potential difference
- water heater
- zero
- accumulating type
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- 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
An earth line prevention electric control device for heat accumulating type electric water heater is provided, which comprises a zero earth line potential difference detection device and a flow switch signal input circuit. The utility model is characterized in that: the zero earth line potential difference detection device is connected between the zero earth lines of power source; the zero earth line potential difference detection device that is bridged between the zero earth lines of the power source is connected to the input end of a singlechip.
Description
Technical field the invention relates to a kind of accumulating type electric water heater defense sector tape electric control technology.
The accumulating type electric water heater that background technology the invention relates to is a kind of of electric heater.Electric heater is divided into accumulating type electric water heater and instant electric water heater by its water storage mode, and accumulating type electric water heater is meant with electric heating tube water is heated to fixedly 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, use the method protection personal safety of the invention when the electric heater product that comprises accumulating type electric water heater does not have when accumulating type electric water heater uses or ground wire and basic insulation lost efficacy simultaneously.
The purpose of summary of the invention the invention provides a kind of accumulating type electric water heater defense sector tape controller for electric consumption, when being intended to accumulating type electric water heater and using and ground wire and basic insulation automatic fast shut-off power supply when losing efficacy simultaneously, and the protection personal safety.
The invention solves the technical scheme that its technical matters adopts: accumulating type electric water heater defense sector tape controller for electric consumption comprises zero grounding potential difference detector set and flow switch signal input circuit; It is characterized in that being connected between ground wire and zero line zero grounding potential difference detector set and with the connected mode of single-chip microcomputer input/output port.Described potential difference detecting device is made up of capacitance-resistance device reduction voltage circuit, rectification circuit and discharge circuit, is aided with mu balanced circuit and bleeder circuit.Zero grounding potential difference detector set is connected across between the power supply Zero-liue, and its output signal is connected with input of single chip.Described flow switch signal input circuit is connected with input of single chip.Single machine output end is connected with relay coil by switching tube, and the normally closed contact of relay is connected with the live wire in-out end with ground wire respectively, the break-make of control ground wire and live wire.
The beneficial effect of the invention is: when accumulating type electric water heater uses and ground wire and basic insulation automatic fast shut-off power supply when losing efficacy ground wire electrification 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 at ground wire E and zero line N span.Potential difference detecting device is made up of capacitance-resistance device reduction voltage circuit, rectification circuit and discharge circuit, is aided with mu balanced circuit and bleeder circuit, and zero grounding potential difference detector set is connected across between the power supply Zero-liue, and its output signal is connected with input of single chip.The flow switch signal input circuit is connected with input of single chip.Single machine output end is connected with relay coil by switching tube, and the normally closed contact of relay is connected with the live wire in-out end with ground wire respectively, the break-make of control ground wire and live wire.
Flow switch signal K input circuit is connected with input of single chip I/O (2) in the present embodiment.Zero grounding potential difference detector set is made up of capacitance-resistance device reduction voltage circuit, rectification circuit and discharge circuit, is aided with mu balanced circuit and bleeder circuit.RC is the capacitance-resistance device.Rectification circuit and mu balanced circuit are made up of D1-D4 and DW, C0 respectively.Bleeder circuit is made up of R1 and R2 respectively.Also can adopt the half-wave and the full-wave rectification of other form among other embodiment or exempt to connect mu balanced circuit and bleeder circuit.The output signal of present embodiment bleeder circuit is connected with the input end of discharge circuit AJ, and another input end of discharge circuit AJ is connected with reference voltage, and discharge circuit AJ output terminal is connected with input of single chip I/O (1).Single machine output end I/O (3), I/O (4) are 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 J1 of relay J, the two ends of J2 respectively, the break-make of ground wire and live wire is controlled at the two ends of normally closed contact J1, the J2 of relay J 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.When the invention is used at accumulating type electric water heater between flow switch K closure or ground wire E and zero line N potential difference (PD) reach 36V safety electricity when above; the ground wire at two ends that the automatic quick control of signal that single-chip microcomputer receives flow switch signal or zero grounding potential difference detector set is serially connected in normally closed contact J1, the J2 of relay J disconnects with live wire, when being implemented in the accumulating type electric water heater use or ground wire and basic insulation when losing efficacy simultaneously to personal safety protection.
The related single-chip microcomputer of the invention is a 8-bit microcontroller, and its resource and accumulating type electric water heater control circuit are shared.Present embodiment adopts the 8-bit microcontroller PIC16C54 of U.S. MICROCHIP company.
Claims (4)
1, a kind of accumulating type electric water heater defense sector tape controller for electric consumption comprises zero grounding potential difference detector set and flow switch signal input circuit; It is characterized in that being connected to zero grounding potential difference detector set between the power supply Zero-liue, the zero grounding potential difference detector set that is connected across between the power supply Zero-liue is connected with the single-chip microcomputer input end.
2, accumulating type 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 transformer reduction voltage circuit, rectification circuit and discharge circuit, is aided with mu balanced circuit and bleeder circuit.
3, accumulating type electric water heater according to claim 1 defense sector tape controller for electric consumption is characterized in that described flow switch signal input circuit is connected with the input port of monolithic maple.
4, accumulating type electric water heater according to claim 1 defense sector tape controller for electric consumption is characterized in that the output port of monolithic maple is connected with relay coil by switching tube, and the normally closed contact of relay is connected with the live wire in-out end with ground wire respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107280 CN200997068Y (en) | 2006-08-31 | 2006-08-31 | Electric controller against grounding wire for regenerative electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107280 CN200997068Y (en) | 2006-08-31 | 2006-08-31 | Electric controller against grounding wire for regenerative electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200997068Y true CN200997068Y (en) | 2007-12-26 |
Family
ID=38995503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620107280 Expired - Fee Related CN200997068Y (en) | 2006-08-31 | 2006-08-31 | Electric controller against grounding wire for regenerative electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200997068Y (en) |
-
2006
- 2006-08-31 CN CN 200620107280 patent/CN200997068Y/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 |