CN2874353Y - Safety protector for electric water heater - Google Patents
Safety protector for electric water heater Download PDFInfo
- Publication number
- CN2874353Y CN2874353Y CN 200620080700 CN200620080700U CN2874353Y CN 2874353 Y CN2874353 Y CN 2874353Y CN 200620080700 CN200620080700 CN 200620080700 CN 200620080700 U CN200620080700 U CN 200620080700U CN 2874353 Y CN2874353 Y CN 2874353Y
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Abstract
A safety protector of the utility model electric water heater relates to a device that can cut off the electric power of electric water heater according to users' requirements and automatically switch on the electric power of electric water heater in order to protect the personal safety and solve the problem of personal safety accident of persons who have a shower due to the electric leakage of the electric water heater. The utility model comprises a transformer that reduces the voltage of AC electric power, a NC microswitch, a low-voltage DC electric power that converts the low-voltage AC into DC, a delay circuit that sends out control signal after gaining the DC power supply and prolonging the set time, and a NO relay circuit that makes the first input terminal connect to the first output terminal, the second input terminal connect to the second output terminal, and the third input terminal connect to the third output terminal after gaining the control signal. Operating the microswitch can cut off the electric power of electric water heater, automatically switch on the electric power of the electric water heater after delaying for some time, and therefore it is very convenient to use and safe and reliable.
Description
Technical field
The utility model relates to a kind of power supply that can cut off electric heater by user's needs, connects the power supply of electric heater after time-delay a period of time automatically, with the device of protection personal safety.
Technical background
For preventing that the electric heater electric leakage from causing shower person's personal safety accident, after many people adopt the water of electric heater to burn predetermined temperature, pull out the plug of electric heater, cut off the electricity supply, then shower.Cause short circuit in the supply socket for anti-sealing splashes in the general bathroom, the supply socket in the bathroom all is installed in higher position, and the plug plug is cumbersome.
The utility model content
The utility model aims to provide a kind of protector of electric heater, causes shower person's personal safety accident to prevent the electric heater electric leakage.
The technical solution of the utility model is: the protector of electric heater, comprise a transformer that AC supply voltage is reduced, normally closed microswitch, one with low-voltage AC be transformed to galvanic low-voltage dc power supply, one obtain that direct current power supply delays time that the delay circuit that sends control signal after the fixed time and one make behind controlled signal that the first input end and first output are connected again, the normally opened relay circuit of second input and the connection of second output, the 3rd input and the connection of the 3rd output; The live wire of AC power connects an end of primary and the first input end of relay circuit; The zero line of AC power connects the other end of primary and second input of relay circuit; The ground wire of AC power connects the 3rd input of relay circuit; One end of transformer secondary output is through an ac input end of microswitch connection low-voltage dc power supply, and the other end of transformer secondary output connects another ac input end of low-voltage dc power supply; Corresponding respectively two dc supply inputs that connect delay circuit and relay circuit of two dc output ends of low-voltage dc power supply; The control output end of delay circuit connects the control input end of relay circuit; First output of relay circuit connects the live wire of electric heater, and second output of relay circuit connects the zero line of electric heater, and the 3rd output of relay circuit connects the ground wire of electric heater.The low-voltage alternating-current power supply of operation microswitch cutoff low dc source, low-voltage dc power supply stops to delay circuit and relay circuit power supply, delay circuit is not worked and relay circuit is in open-circuit condition, and the live wire of electric heater, zero line, ground wire disconnect with the live wire of AC power, zero line, ground wire respectively.Discharge the low-voltage alternating-current power supply that microswitch recovers low-voltage dc power supply, low-voltage dc power supply is to delay circuit and relay circuit power supply, delay circuit does not send control signal to relay circuit in the delay time of setting, relay circuit is failure to actuate, and keeps open-circuit condition.Interior during this period of time user can carry out safety shower relievedly; After arriving delay time, delay circuit sends control signal to relay circuit, and the relay circuit action is kept closed, and the live wire of electric heater, zero line, ground wire are connected with live wire, zero line, the ground wire of AC power respectively.Electric heater can be once more heats the water of inside, and hot water is provided.
A kind of concrete delay circuit embodiment is: described delay circuit adopts the CD4060 IC chip, and 16 pin of this chip connect the positive supply output of low-voltage dc power supply, and 8 pin connect the negative supply output of low-voltage dc power supply; 9 pin connect an end of charging capacitor, and 10 pin connect an end of charging resistor, and 11 pin connect an end of clamp resistance and the negative pole of clamp diode, and 12 pin connect the negative pole of electrochemical capacitor and an end of discharge resistance; The other end of the other end of charging capacitor, the other end of charging resistor and clamp resistance interconnects; The positive pole of electrochemical capacitor connects the positive supply output of low-voltage dc power supply, and the other end of discharge resistance connects the negative supply output of low-voltage dc power supply; 1 pin of this chip is the control output end of delay circuit, and internally connects the positive pole of clamp diode.
The most handy light emitting diode indication off-position, the prompting user can carry out safety shower relievedly: the light emitting diode and the current-limiting resistance thereof that are serially connected with an indication off-position between 9 pin of described CD4060 IC chip and the positive supply output of low-voltage dc power supply.
Perhaps with a light emitting diode indication power supply state, prompting user electric heater is switched on, unsuitable shower: be serially connected with a light emitting diode and a current-limiting resistance thereof of indicating power supply state between first output of described relay circuit and second output of relay circuit.
A kind of concrete relay circuit embodiment is: described relay circuit comprises a switching transistor and relay, one end of relay coil connects the positive supply output of low-voltage dc power supply, the other end of relay coil connects transistorized colelctor electrode, transistorized base stage is through the control output end of a current-limiting resistance connection delay circuit, and transistorized emitter stage connects the negative supply output of low-voltage dc power supply; Fixed contact in first group of contact of relay is a first input end, and movable contact is first output; Fixed contact in second group of contact of relay is second input, and movable contact is second output; Fixed contact in the 3rd group of contact of relay is the 3rd input, and movable contact is the 3rd output.Delay circuit does not have control signal output, and transistor ends, and does not have electric current to flow through in the relay coil, and three groups of contacts keep normally open.When transistorized base stage obtained the control signal of delay circuit, transistorized emitter stage and colelctor electrode conducting had electric current to flow through in the relay coil, and three groups of contact adhesives respectively enter closure state.
Perhaps the number of relay is more than one, for example: described relay is divided into two, and first relay has two groups of contacts, and second relay has one group of contact; The coils from parallel connection of coils of two relays is connected between the positive supply output and transistorized colelctor electrode of low-voltage dc power supply; Fixed contact in first group of contact of first relay is a first input end, and movable contact is first output; Fixed contact in second group of contact of first relay is second input, and movable contact is second output; The fixed contact of second relay is the 3rd input, and movable contact is the 3rd output.
The protector of the utility model electric heater; adopt above-mentioned structure; utilize normally closed microswitch control temporarily disconnected direct current power supply; relay circuit is entered be in open-circuit condition; the live wire, zero line, ground wire that cuts off electric heater respectively with the getting in touch of the live wire of AC power, zero line, ground wire, reach the assurance purpose of safety.Discharge microswitch and recover the low-voltage dc power supply power supply, delay circuit does not send control signal to relay circuit in the delay time of setting, and relay circuit is failure to actuate, and keeps open-circuit condition.Interior during this period of time user can carry out safety shower relievedly; After arriving delay time, delay circuit sends control signal to relay circuit, and the relay circuit action is kept closed, and the live wire of electric heater, zero line, ground wire are connected with live wire, zero line, the ground wire of AC power respectively.Electric heater can be once more heats the water of inside, and hot water is provided.Therefore do not need the user to plug attaching plug,, do not have the control signal relay circuit to be failure to actuate, can not enter the closure state that makes the electric heater energising even very easy to use and delay circuit breaks down, safe and reliable.The delay time of delay circuit can be easy to satisfy different users' specific (special) requirements by adjusting the parameter change of device in the circuit.Delay circuit and relay circuit adopt above-mentioned structure, and be simple and reliable, and with low cost, is easy to apply.Particularly the utility model can be independent of outside the electric heater, puts on market separately, is equipped with existing electric heater use in each family, applied range.
Description of drawings
Fig. 1 is the circuit box structure schematic diagram of an embodiment of protector of the utility model electric heater.
Fig. 2 is a kind of particular circuit configurations figure of Fig. 1 embodiment.
The specific embodiment
The circuit box structure of an embodiment of protector of the utility model electric heater; as shown in Figure 1, this protector comprises a transformer 1 that AC supply voltage is reduced; a normally closed microswitch 2; one is transformed to galvanic low-voltage dc power supply 3 with low-voltage AC; one makes the first input end and first output connect behind controlled signal obtaining delay time the again delay circuit 4 that sends control signal after the fixed time and one of direct current power supply; second input and second output are connected; the normally opened relay circuit 5 that the 3rd input and the 3rd output are connected.
The live wire L of AC power connects the elementary end of transformer 1 and the first input end of relay circuit 5; The zero line N of AC power connects the elementary other end of transformer 1 and second input of relay circuit 5; The ground wire G of AC power connects the 3rd input of relay circuit 5.
One end of 1 level of transformer is through an ac input end of microswitch 2 connection low-voltage dc power supplies 3, and the other end of 1 level of transformer connects another ac input end of low-voltage dc power supply 3.Corresponding respectively two dc supply inputs that connect delay circuit 4 and relay circuit 5 of two dc output ends of low-voltage dc power supply 3.The control output end of delay circuit 4 connects the control input end of relay circuit 5.The live wire of the first output L ' connection electric heater of relay circuit 5, the zero line of the second output N ' connection electric heater of relay circuit 5, the ground wire of the 3rd output G ' connection electric heater of relay circuit 5.
A stay cord is installed on the operating knob of microswitch 2, spur this stay cord, microswitch 2 actions, the low-voltage alternating-current power supply of cutoff low dc source 3, low-voltage dc power supply 3 stops to delay circuit 4 and relay circuit 5 power supplies, delay circuit 4 is not worked and relay circuit 5 is in open-circuit condition, and the live wire of electric heater, zero line, ground wire disconnect with live wire L, the zero line N of AC power, ground wire G respectively.Discharge stay cord, microswitch 2 recovers the low-voltage alternating-current power supply of low-voltage dc power supply 3, and low-voltage dc power supply 3 is to delay circuit 4 and relay circuit 5 power supplies, and delay circuit 4 does not send control signal to relay circuit 5 in the delay time of setting, relay circuit 5 is failure to actuate, and keeps open-circuit condition.Interior during this period of time user can carry out safety shower relievedly; After arriving delay time, delay circuit 4 sends control signal to relay circuit 5, and relay circuit 5 actions are kept closed, and the live wire of electric heater, zero line, ground wire are connected with live wire L, zero line N, the ground wire G of AC power respectively.Electric heater can be once more heats the water of inside, and hot water is provided.
A kind of particular circuit configurations of present embodiment, as shown in Figure 2.The live wire L of AC power connects first input end---the fixed contact among first group of contact J1-1 of first relay J 1 of relay circuit 5, and connects the elementary end of transformer 1 through fuse A.The zero line N of AC power connects the transformer 1 elementary other end and second input of relay circuit 5---the fixed contact among second group of contact J1-2 of first relay J 1.The ground wire G of AC power connects the 3rd input---the fixed contact of second relay J 2 of relay circuit 5.Two ends piezo-resistance R1 in parallel that transformer 1 is elementary, protection transformer 1 and subsequent conditioning circuit are not damaged by unexpected high voltage.Movable contact among first group of contact J1-1 of the first output L ' of relay circuit 5---first relay J 1, the live wire of connection electric heater.Movable contact among second group of contact J1-2 of the second output N ' of relay circuit 5---first relay J 1 connects the zero line of electric heater, and the movable contact of the 3rd output G ' of relay circuit 5---second relay J 2 connects the ground wire of electric heater.For prompting user electric heater is switched on unsuitable shower; Present embodiment is indicated power supply state with a light emitting diode D5.Be serially connected with the light emitting diode D5 and the current-limiting resistance R9 thereof of an indication power supply state between first output L ' of relay circuit 5 and the second output N ' of relay circuit 5.
The ac input end of one end of 1 level of transformer full-bridge rectifier Q1 in microswitch 2 connection low-voltage dc power supplies 3, the other end of 1 level of transformer connects another ac input end of full-bridge rectifier Q1 in the low-voltage dc power supply 3.The positive output end of full-bridge rectifier Q1 connects input, the positive pole of filter capacitor C1 and the end of filter resistance R2 of integrated regulator U1 in the low-voltage dc power supply 3.The negative output terminal of full-bridge rectifier Q1 connects reference edge, the negative pole of filter capacitor C1 and the other end of filter resistance R2 of integrated regulator U1, and connects inner ground wire.The output of integrated regulator U1 connects the positive pole of filter capacitor C2 and the end of filter resistance R3, the positive output end of formation low-voltage dc power supply 3+.Inner ground wire connects the negative pole of filter capacitor C2 and the other end of filter resistance R3, the negative output terminal of formation low-voltage dc power supply 3-.
Two dc output ends of low-voltage dc power supply 3+,-corresponding respectively two dc supply inputs that connect delay circuit 4 and relay circuit 5.
Delay circuit 4 adopts CD4060 IC chip U2, the positive supply output of the 16 pin connection low-voltage dc power supply 3 of CD4060 IC chip U2+, the negative supply output of 8 pin connection low-voltage dc power supply 3-; 9 pin connect the end of charging capacitor C4, and 10 pin connect the end of charging resistor R6, and 11 pin connect the end of clamp resistance R7 and the negative pole of clamp diode D2, and 12 pin connect the negative pole of electrochemical capacitor C3 and the end of discharge resistance R4.The other end of the other end of charging capacitor C4, the other end of charging resistor R6 and clamp resistance R7 interconnects.The positive supply output of the positive pole connection low-voltage dc power supply 3 of electrochemical capacitor C4+, the negative supply output of the other end connection low-voltage dc power supply 3 of discharge resistance R4-.1 pin of CD4060 IC chip U2 is the control output end of delay circuit 4, and internally connects the positive pole of clamp diode D2.
For the prompting user can carry out safety shower relievedly, present embodiment is indicated off-position with light emitting diode D1.9 pin of CD4060 IC chip and the positive supply output of low-voltage dc power supply 3+between be connected in series the light emitting diode D1 and the current-limiting resistance R5 thereof of an indication off-position.
Relay circuit 5 comprises a switching transistor T1, first relay J 1 and second relay J 2 that one group of contact is arranged that two groups of contacts are arranged.The base stage of transistor T 1 connects control output end---1 pin of CD4060 IC chip U2 of delay circuit 4 through current-limiting resistance R8, the emitter stage of transistor T 1 connect the negative supply output of low-voltage dc power supply 3-; The coils from parallel connection of coils of two relay J 1, J2, be connected on the positive supply output of low-voltage dc power supply 3+and the colelctor electrode of transistor T 1 between.The coil of two relay J 1, J2 reverse protection diode D3, a D4 respectively in parallel.Fixed contact among first group of contact J1-1 of first relay J 1 is first input end L, and movable contact is the first output L '; Fixed contact among second group of contact J1-2 of first relay J 1 is the second input N, and movable contact is the second output N '; The fixed contact of second relay J 2 is the 3rd input G, and movable contact is the 3rd output G '.
Low-voltage dc power supply 3 is stopped power supply and has just been restored electricity and delay circuit 4 when being in the time-delay state, delay circuit 4 does not have control signal output, transistor T 1 ends, and does not have electric current to flow through in the coil of two relay J 1, J2, and three groups of contact J1-1, J1-2, J2 keep normally open.Three input L, N, G are not electrically connected the electric heater no power with corresponding output L ', N ', G ' formation.Delay circuit 4 is through behind the delay cycle, when the base stage of transistor T 1 obtains the control signal of delay circuit, the emitter stage of transistor T 1 and colelctor electrode conducting, there is electric current to flow through in the coil of two relay J 1, J2, three groups of contact J1-1, J1-2, J2 distinguish adhesive, enter closure state, the electric heater energising.The design of present embodiment is safe especially, is burnt even transistor T 1 breaks down, and only can cut off electric current in the coil of two relay J 1, J2, makes the electric heater no power, can not stay the hidden danger of personal injury.
Can adopt the relay of three groups of contacts in other embodiments, then an end of this relay coil connect the positive supply output of low-voltage dc power supply 3+, the other end of this relay coil connects the colelctor electrode of transistor T 1, the base stage of transistor T 1 connects the control output end of delay circuit 4 through current-limiting resistance R8, the emitter stage of transistor T 1 connect the negative supply output of low-voltage dc power supply 3-.Fixed contact in first group of contact of this relay is first input end L, and movable contact is the first output L '; Fixed contact in second group of contact is the second input N, and movable contact is the second output N '; Fixed contact in the 3rd group of contact is the 3rd input G, and movable contact is the 3rd output G '.If delay circuit 4 does not have control signal output, transistor T 1 ends, and does not have electric current to flow through in the relay coil, and three groups of contacts keep normally open.When the base stage of transistor T 1 obtained the control signal of delay circuit, transistorized emitter stage and colelctor electrode conducting had electric current to flow through in the relay coil, and three groups of contact adhesives respectively enter closure state.
The above only is the utility model preferred embodiment, does not limit the scope that the utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that the utility model is contained.
Claims (6)
1. the protector of electric heater is characterized in that: comprise a transformer that AC supply voltage is reduced, normally closed microswitch, one with low-voltage AC be transformed to galvanic low-voltage dc power supply, one obtain that direct current power supply delays time that the delay circuit that sends control signal after the fixed time and one make behind controlled signal that the first input end and first output are connected again, the normally opened relay circuit of second input and the connection of second output, the 3rd input and the connection of the 3rd output; The live wire of AC power connects an end of primary and the first input end of relay circuit; The zero line of AC power connects the other end of primary and second input of relay circuit; The ground wire of AC power connects the 3rd input of relay circuit; One end of transformer secondary output is through an ac input end of microswitch connection low-voltage dc power supply, and the other end of transformer secondary output connects another ac input end of low-voltage dc power supply; Corresponding respectively two dc supply inputs that connect delay circuit and relay circuit of two dc output ends of low-voltage dc power supply; The control output end of delay circuit connects the control input end of relay circuit; First output of relay circuit connects the live wire of electric heater, and second output of relay circuit connects the zero line of electric heater, and the 3rd output of relay circuit connects the ground wire of electric heater.
2. the protector of electric heater according to claim 1, it is characterized in that: described delay circuit adopts the CD4060 IC chip, 16 pin of this chip connect the positive supply output of low-voltage dc power supply, and 8 pin connect the negative supply output of low-voltage dc power supply; 9 pin connect an end of charging capacitor, and 10 pin connect an end of charging resistor, and 11 pin connect an end of clamp resistance and the negative pole of clamp diode, and 12 pin connect the negative pole of electrochemical capacitor and an end of discharge resistance; The other end of the other end of charging capacitor, the other end of charging resistor and clamp resistance interconnects; The positive pole of electrochemical capacitor connects the positive supply output of low-voltage dc power supply, and the other end of discharge resistance connects the negative supply output of low-voltage dc power supply; 1 pin of this chip is the control output end of delay circuit, and internally connects the positive pole of clamp diode.
3. the protector of electric heater according to claim 2 is characterized in that: the light emitting diode and the current-limiting resistance thereof that are serially connected with an indication off-position between 9 pin of described CD4060 IC chip and the positive supply output of low-voltage dc power supply.
4. according to the protector of claim 1 or 2 or 3 described electric heaters, it is characterized in that: the light emitting diode and the current-limiting resistance thereof that are serially connected with an indication power supply state between first output of described relay circuit and second output of relay circuit.
5. according to the protector of claim 1 or 2 or 3 described electric heaters, it is characterized in that: described relay circuit comprises a switching transistor and relay, one end of relay coil connects the positive supply output of low-voltage dc power supply, the other end of relay coil connects transistorized colelctor electrode, transistorized base stage is through the control output end of a current-limiting resistance connection delay circuit, and transistorized emitter stage connects the negative supply output of low-voltage dc power supply; Fixed contact in first group of contact of relay is a first input end, and movable contact is first output; Fixed contact in second group of contact of relay is second input, and movable contact is second output; Fixed contact in the 3rd group of contact of relay is the 3rd input, and movable contact is the 3rd output.
6. the protector of electric heater according to claim 5, it is characterized in that: described relay is divided into two, and first relay has two groups of contacts, and second relay has one group of contact; The coils from parallel connection of coils of two relays is connected between the positive supply output and transistorized colelctor electrode of low-voltage dc power supply; Fixed contact in first group of contact of first relay is a first input end, and movable contact is first output; Fixed contact in second group of contact of first relay is second input, and movable contact is second output; The fixed contact of second relay is the 3rd input, and movable contact is the 3rd output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620080700 CN2874353Y (en) | 2006-01-24 | 2006-01-24 | Safety protector for electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620080700 CN2874353Y (en) | 2006-01-24 | 2006-01-24 | Safety protector for electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2874353Y true CN2874353Y (en) | 2007-02-28 |
Family
ID=37780952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620080700 Expired - Fee Related CN2874353Y (en) | 2006-01-24 | 2006-01-24 | Safety protector for electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2874353Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951719A (en) * | 2007-11-01 | 2011-01-19 | 孙明海 | Electronic multigang switch controller |
| CN101951720A (en) * | 2007-11-01 | 2011-01-19 | 孙明海 | Electronic multigang switch controller |
| CN103595234A (en) * | 2012-08-15 | 2014-02-19 | 成都昊地科技有限责任公司 | An automatic power on-off control apparatus of an electric device |
| CN109442560A (en) * | 2018-09-29 | 2019-03-08 | 万家乐热能科技有限公司 | A method of it improving plate and changes formula burnt gas wall hanging furnace hot water performance |
-
2006
- 2006-01-24 CN CN 200620080700 patent/CN2874353Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951719A (en) * | 2007-11-01 | 2011-01-19 | 孙明海 | Electronic multigang switch controller |
| CN101951720A (en) * | 2007-11-01 | 2011-01-19 | 孙明海 | Electronic multigang switch controller |
| CN101951719B (en) * | 2007-11-01 | 2013-06-26 | 常州市明海多联开关厂 | Electronic multigang switch controller |
| CN101951720B (en) * | 2007-11-01 | 2013-06-26 | 常州市明海多联开关厂 | Electronic multigang switch controller |
| CN103595234A (en) * | 2012-08-15 | 2014-02-19 | 成都昊地科技有限责任公司 | An automatic power on-off control apparatus of an electric device |
| CN109442560A (en) * | 2018-09-29 | 2019-03-08 | 万家乐热能科技有限公司 | A method of it improving plate and changes formula burnt gas wall hanging furnace hot water performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070228 |