CN201717602U - Noise-proof type anti-electric touch and anti-overheating protector of electric water heater - Google Patents
Noise-proof type anti-electric touch and anti-overheating protector of electric water heater Download PDFInfo
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- CN201717602U CN201717602U CN2010201585310U CN201020158531U CN201717602U CN 201717602 U CN201717602 U CN 201717602U CN 2010201585310 U CN2010201585310 U CN 2010201585310U CN 201020158531 U CN201020158531 U CN 201020158531U CN 201717602 U CN201717602 U CN 201717602U
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Abstract
The utility model relates to a noise-proof anti-electric touch and anti-overheating protector of an electric water heater, which comprises a container for containing water to be heated; an electric heater for heating the water; and a control system, wherein, the control system comprises a direct-current power supply, an amplifier, a wave detector, a comparator, an executor, a sensing electrode, a container grounding wire, a line grounding wire and a protection ground wire. A positive terminal of a direct current voltage UC outputted by the direct-current power supply is respectively connected with the amplifier, the comparator and the executor, a negative terminal of the direct current voltage UC is connected with the line grounding wire; the sensing electrode is connected with the amplifier by a third capacitance C3; the amplifier, the wave detector, the comparator and the executor are connected in turn and are connected with the line grounding wire; the container grounding wire and the line grounding wire are not connected, and the container grounding wire and the line grounding wire are all connected with the protection ground wire.
Description
Technical field
The utility model relates to household appliance technical field, relates in particular to a kind of electric heater noise-type protection against electric shock anti-dry protector.
Background technology
Electric heater is the household electrical appliance that enter a lot of families already, and for the family life of electrification brings great convenience, existing electric heater is divided into storage-type and Instant heating type two types.But storage-type and Instant heating type two types electric heater, its important technological problems that must solve is that protection against electric shock is hurted sb.'s feelings, another major issue is an anti-dry safety problem on fire.
Number of patent application is 200820164704.2, and denomination of invention discloses a kind of water heater protection against electric shock technology in the utility application of " a kind of protection against electric shock water heater ", and it provides a kind of discharge part, and water supply stream flows through the protection against electric shock effect that reaches.
Prior art is aspect the electric heater protection against electric shock, and the huge or control circuit of ubiquity or mechanical structure is complicated and cause the shortcoming that volume is big, cost is high.
In the also defective of two aspects below the ubiquity aspect the anti-dry: 1 or nonreactive dry combustion method function, produce very big potential safety hazard; 2 or make transducer, contain the function of anti-anhydrous dry combustion method with anti-" overheated " function with semiconductor thermistor NTC or PTC.As everyone knows, semiconductor thermistor is the very big senser element of hot inert, waits it to feel " overheated ", and the danger of anhydrous dry combustion method took place already.So this type of technology can only play the effect of anti-water temperature " overheated ", but the function that can't realize preventing " anhydrous dry combustion method ".
The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of simple structure is provided, electric heater noise-type protection against electric shock anti-dry protector with low cost.
Summary of the invention
The utility model is at the characteristic of the main WATER AS FLOW MEDIUM in the electric heater and propose.The related content of noise in this at first narrates about water: because daily water consumption is non-pure water, especially contain ion, aqueous electron multiple charged corpuscles such as (hydrated elecctron or eaq) in the widely used running water, therefore have certain conductive capability.Effects such as these charged corpuscles are heated, light, electromagnetic field can produce multiple noises such as thermal noise, Johnson noise, flicker noise.Can prove according to methods such as " probability theory " and thermodynamics statistical theories, the noise in the water be power spectrum density evenly, with the white noise of frequency-independent.
Its voltage mean-square value is Un
2=4KTRB
In the following formula: K is a Boltzmann constant: 1.38 * 10
-23Joule/degree (absolute temperature);
T is the temperature of running water, measures with absolute temperature;
R is the equivalent resistance of running water;
B is the passband of testing equipment.
Following formula shows that having numerical value in the running water is the noise voltage of Un.Then can show this noise voltage Un intuitively with oscilloscope, Fig. 1 is the noise audiogram of area, Shanghai running water.
The utility model utilizes the break-make of the noise signal control electric heater heating power supply in the water, reaches electric heater protection against electric shock and anti-dry combustion method dual purpose device.
According to an aspect of the present utility model, a kind of electric heater noise-type protection against electric shock anti-dry protector is provided, it comprises DC power supply, amplifier, wave detector, comparator, actuator, sensing electrode, container earth connection, line-to-ground line, protection ground wire, it is characterized in that: the anode of the direct voltage of DC power supply output is connected with amplifier, comparator, actuator respectively, and negative terminal is connected with the line-to-ground line; Sensing electrode is connected with amplifier by the 3rd electric capacity; Amplifier, wave detector, comparator, actuator be connected successively and, they all are connected with the line-to-ground line; Directly do not connect mutually between container earth connection, the line-to-ground line but they all are connected with protecting grounding wire E.
Preferably, after sensing electrode and the 3rd capacitances in series with the negative pole of first diode, first, second resistance separately an end and the base stage of triode be connected; The anodal of the other end of the emitter of triode, first resistance, first diode all is connected with the line-to-ground line; The collector electrode of triode is connected with an end of the 3rd resistance and an end of the 4th electric capacity; Second, third resistance other end separately all is connected with the anode of DC power supply.
In addition, the other end of the 4th electric capacity is connected with the negative pole of second diode and the positive pole of the 3rd diode; Five, the 6th electric capacity separately an end and an end of the 4th resistance all be connected with the negative pole of the 3rd diode; The positive pole of second diode, the 5th, the 6th electric capacity other end separately all are connected with circuit ground.
In addition, an end of the other end of the 4th resistance, the 5th resistance all is connected with in-phase input end 3 pin of integrated transporting discharging; Six, the 7th a resistance end separately all is connected with inverting input 2 pin of integrated transporting discharging; Eight, the 9th a resistance end separately all is connected with output 1 pin of integrated transporting discharging; 8 pin, the 6th of integrated transporting discharging, the 8th resistance other end separately all are connected with the anode of DC power supply; 4 pin, the 5th, the 7th of integrated transporting discharging, the 9th resistance other end separately all are connected with circuit ground.
In addition, the base stage of triode, emitter are connected with 1 pin, the circuit ground of integrated transporting discharging respectively; The line bag of relay is with after the 4th diode is in parallel, an end (D
4Positive terminal) be connected with the collector electrode of triode, the other end is connected with the anode of DC power supply; One end of the make contact of relay is connected with the L of AC220V end, the other end is connected with an end of the tenth resistance and an end of load; The other end of the tenth resistance is connected with the negative pole of indicator light; The positive pole of indicator light, the other end of load all are connected with the N end of AC220V.
Adopt the utility model, can bring following beneficial effect:
Promptly by noise signal the disconnected and logical of the power supply of controlling electric heater of whether opening a way; thereby solve two major issues of protection against electric shock and anti-dry combustion method; overcome the deficiencies in the prior art, a kind of simple structure is provided, electric heater noise-type protection against electric shock anti-dry protector with low cost.
Description of drawings
Fig. 1 is the oscillogram of noise Un in the water of oscilloscope demonstration.
Fig. 2 is the functional-block diagram of preferred embodiment of the present utility model.
Fig. 3 is the circuit theory diagrams of preferred embodiment of the present utility model.
Embodiment
Shown in Figure 2; electric heater noise-type protection against electric shock anti-dry protector of the present utility model, it is made up of DC power supply 10, amplifier 20, wave detector 30, comparator 40, actuator 50, sensing electrode AK, container earth connection EV, line-to-ground line EC and protection ground wire E.Below for sake of convenience, Heating Cup or heating inner bag are called " heating container ".
According to electric heater noise-type protection against electric shock anti-dry protector of the present utility model, wherein: the direct voltage U of DC power supply 10 outputs
CAnode be connected with amplifier 20, comparator 40, actuator 50 respectively, negative terminal is connected with line-to-ground line EC; Sensing electrode AK is by the 3rd capacitor C
3Be connected with amplifier 20; Amplifier 20, wave detector 30, comparator 40, actuator 50 be connected successively and, they all are connected with line-to-ground line EC; Directly do not connect mutually between container earth connection EV, the line-to-ground line EC, but they all are connected with the protection grounding wire E.Container earth connection EV is characterized as: the one end is connected with protection grounding wire E and chamber wall, and the other end stretches in the interior water of described container.
In conjunction with Fig. 2; the course of work of the present utility model is: when the water level in the container is higher than preset water level A and water and has been connected with protection ground wire E; the noise signal Un that sensing electrode AK obtains amplifies through amplifier 20; after wave detector 30 detections, deliver to comparator 40 again; at this moment; comparator 40 output high level, actuator are then carried out the instruction with relay make contact DH closure, load R
L(or electric heater or A.C. contactor line bag or thyristor control loop) just connected with AC220V, the electric heater operate as normal, and simultaneously, indicator light LED lights.
When the container middle water level is lower than preset water level A or container earth connection EV and protection ground wire E disconnection, the noise signal open circuit, Un → 0, at this moment, and comparator 40 output low levels, actuator is carried out the instruction with relay make contact DH disconnection, at this moment, load R
LWith AC220V: the L end disconnects and dead electricity, indicator light LED are extinguished.
Indicator light LED has informed the state of electric heater, when LED lights, shows that electric heater can normally use; When LED extinguishes, show that electric heater or lack of water have dry combustion method danger; Or water is not connected the danger that existence is got an electric shock with protection ground wire E.
Mode of operation of the present utility model is: as long as electric heater exists or dangerous situation has taken place, the utility model just refusal is powered or is cut off the electricity supply automatically.
Fig. 3 is the circuit structure diagram of the preferred embodiment of the utility model, among the figure, and triode V
1(model C 9014) and peripheral components thereof consist of amplifier, it is characterized in that: sensing electrode AK and the 3rd capacitor C
3The series connection back and the first diode D
1Negative pole, first, second resistance R
1, R
2An end separately and triode V
1Base stage connect; Triode V
1Emitter, first resistance R
1The other end, the first diode D
1Anodal all be connected with line-to-ground line EC (hereinafter to be referred as circuit ground); Triode V
1Collector electrode and the 3rd resistance R
3An end and the 4th capacitor C
4An end connect; Second, third resistance R
2, R
3The other end separately all with DC power supply U
CAnode connect.
Four, the 5th, the 6th capacitor C
4, C
5, C
6, second, third diode D
2, D
3Consist of wave detector.It is characterized in that: the 4th capacitor C
4The other end and the second diode D
2Negative pole and the 3rd diode D
3Positive pole be connected; The 3rd diode D
3Negative pole and the 5th, the 6th capacitor C
5, C
6An end separately and the 4th resistance R
4An end connect; The second diode D
2Positive pole, the 5th, the 6th capacitor C
5, C
6The other end separately all is connected with circuit ground.
Integrated transporting discharging IC (model LM393) and peripheral components thereof have been formed comparator, it is characterized in that: the 4th resistance R
4The other end, the 5th resistance R
5An end all be connected with in-phase input end 3 pin of integrated transporting discharging IC; Six, the 7th resistance R
6, R
7An end separately all is connected with inverting input 2 pin of integrated transporting discharging IC; Eight, the 9th resistance R
8, R
9An end separately all is connected with output 1 pin of integrated transporting discharging IC; 8 pin, the 6th of integrated transporting discharging IC, the 8th resistance R
6, R
8The other end separately all with DC power supply U
CAnode connect; 4 pin, the 5th, the 7th of integrated transporting discharging IC, the 9th resistance R
5, R
7, R
9The other end separately all is connected with circuit ground.
Triode V
2(model C 9014) and peripheral components thereof have been formed actuator.It is characterized in that: triode V
2Base stage, emitter be connected with 1 pin, the circuit ground of integrated transporting discharging IC respectively; The line bag of relay J and the 4th diode D
4After the parallel connection, an end (D
4Positive terminal) with triode V
2Collector electrode connection, the other end and DC power supply U
CAnode connect; The end of the make contact DH of relay J and the L of AC220V end is connected, the other end and the tenth resistance R
10An end and the end of load RL connect; The tenth resistance R
10The other end be connected with the negative pole of indicator light LED; The other end of the positive pole of indicator light LED, load RL all is connected with the N end of AC220V.
The course of work of present embodiment is:
1, when the water level in the container was higher than preset water level A and water and is connected with protection ground wire E, noise signal Un was through sensing electrode AK and capacitor C
3It is after-applied to triode V to be coupled
1Emitter junction on, again through V
1Amplification, C
4Coupling, D
3Detection, C
5, C
6Filtering, R
4, R
5Add to after the dividing potential drop on in-phase input end 3 pin of integrated transporting discharging IC, its numerical value is U
3DC power supply Uc is through R
6, R
7Obtain reference voltage U after the dividing potential drop
2Be applied on inverting input 2 pin of integrated transporting discharging IC; Those skilled in the art can adjust R
4, R
5, R
6, R
7Value, when Un is arrived, U
3＞U
2At this moment, 1 end of IC output high level, V
2The line Bao Dedian of conducting, relay J, its make contact DH closure, AC220V connection, load get electric, the electric heater operate as normal; Simultaneously, indicator light LED also electric lighting, inform that electric heater is just in operate as normal.
When 2, the container middle water level was lower than A, sensing electrode AK surfaced, noise loop is opened a way, Un → 0 causes U3＜U2, the 1 pin output low level of integrated transporting discharging IC, and V2 ends, and DH disconnects, load R
LDead electricity is removed thereby dry combustion method is dangerous.Simultaneously, indicator light LED goes out, and informs that electric heater has fault.
3, when container earth connection EV is not connected with protection ground wire E, noise signal open circuit, Un → 0, U
3＜U
2, V
2By, DH disconnect, the L end of AC220V also disconnects, Danger Electric shock risk is removed, load RL outage, LED goes out, and informs that electric heater has fault.
In brief, the core control model of design philosophy of the present utility model is: under the situation that possesses following two conditions, the utility model is just connected the heating power supply of electric heater automatically.
One, the water level in the container is higher than A (promptly not having dry combustion method danger on fire)
Two, the water in the container is connected (promptly not having the danger of electric shock) with protection ground wire E
Otherwise as long as above-mentioned any one condition does not possess, the utility model just cuts off heating power supply automatically and refuses electric heater starting heating.
Use electric heater noise-type protection against electric shock anti-dry protector of the present utility model, can bring following beneficial effect:
One, simple in structure, with low cost.Technical scheme in the utility model provides simple circuit, can realize two big functions of electric heater protection against electric shock, anti-dry combustion method with extremely low price.
Two, with prior art in use PTC or NTC to make sensor design electric heater " anti-dry " circuit compare because its PTC or the hot inert of NTC are big, therefore, this design is difficult to realize the function of instant anti-dry.The utility model when " dry combustion method " trend occurring, just fast, instantaneous trip the AC220V power supply, therefore, removed electric heater " dry combustion method " danger on fire effectively.
Three, with in the prior art use the program of " Fang Dianqiang " protection against electric shock to be: find that electric leakage overflows after (for example 10mA), cut off the electricity supply, be to take precautions against afterwards.As previously mentioned, the program of the utility model protection against electric shock is: not being connected (mean Danger Electric shock risk is arranged) with regard to the force disconnect power supply with protection ground wire E in case find water, making electric heater can't start heating, is prior strick precaution.Therefore, the utlity model has more reliable electroshock-proof function.
The embodiment of above specification and related content are only stated the utility model and unrestricted the utility model in order to lock.The skill personnel of this area are to be understood that, though understanding on the basis of technical solutions of the utility model, the replacement that can make amendment or be equal to the utility model, but all do not break away from the technical scheme and the improvement of essence of the present utility model and scope, all should be in the covering scope of claim of the present utility model.
Claims (5)
1. electric heater noise-type protection against electric shock anti-dry protector; comprise DC power supply (10), amplifier (20), wave detector (30), comparator (40), actuator (50), sensing electrode (AK), container earth connection (EV), line-to-ground line (EC), protection ground wire E, it is characterized in that: the direct voltage (U of DC power supply (10) output
C) anode be connected with amplifier (20), comparator (40), actuator (50) respectively, negative terminal is connected with line-to-ground line (EC); Sensing electrode (AK) is connected with amplifier (20) by the 3rd electric capacity (C3); Amplifier (20), wave detector (30), comparator (40), actuator (50) be connected successively and, they all are connected with line-to-ground line (EC); Directly do not connect mutually between container earth connection (EV), the line-to-ground line (EC) but they all are connected with protecting grounding wire E.
2. electric heater noise-type protection against electric shock anti-dry protector as claimed in claim 1 is characterized in that: sensing electrode (AK) and the 3rd electric capacity (C
3) the series connection back and the first diode (D
1) negative pole, first, second resistance R
1, R
2An end separately and triode (V
1) base stage connect; Triode (V
1) emitter, first resistance R
1The other end, the first diode (D
1) anodal all be connected with line-to-ground line (EC); Triode (V
1) collector electrode and the 3rd resistance (R
3) an end and the 4th electric capacity (C
4) an end connect; Second, third resistance (R
2), (R
3) separately the other end all with DC power supply (U
C) anode connect.
3. electric heater noise-type protection against electric shock anti-dry protector as claimed in claim 1 is characterized in that: the 4th electric capacity (C
4) the other end and the second diode (D
2) negative pole and the 3rd diode (D
3) positive pole be connected; Five, the 6th electric capacity (C
5), (C
6) separately an end and the 4th resistance (R
4) an end all with the 3rd diode (D
3) negative pole connect; Second diode (the D
2) positive pole, the 5th, the 6th electric capacity (C
5), (C
6) separately the other end all is connected with circuit ground.
4. the anti-dry combustion method protector of electric heater noise-type protection against electric shock as claimed in claim 1 is characterized in that: the 4th resistance (R
4) the other end, the 5th resistance (R
5) an end all be connected with in-phase input end 3 pin of integrated transporting discharging (IC); Six, the 7th resistance (R
6), (R
7) separately an end all is connected with inverting input 2 pin of integrated transporting discharging (IC); Eight, the 9th resistance (R
8), (R
9) separately an end all is connected with output 1 pin of integrated transporting discharging (IC); 8 pin, the 6th of integrated transporting discharging (IC), the 8th resistance (R
6), (R
8) separately the other end all with DC power supply (U
C) anode connect; 4 pin, the 5th, the 7th of integrated transporting discharging (IC), the 9th resistance (R
5), (R
7), (R
9) separately the other end all is connected with circuit ground.
5. electric heater noise-type protection against electric shock anti-dry protector as claimed in claim 1 is characterized in that: triode V
2Base stage, emitter be connected with 1 pin, the circuit ground of integrated transporting discharging (IC) respectively; The line bag of relay (J) and the 4th diode (D
4) after the parallel connection, an end (D
4Positive terminal) with triode (V
2) collector electrode connection, the other end and DC power supply (U
C) anode connect; One end of the make contact (DH) of relay (J) and the L of AC220V end is connected, the other end and the tenth resistance (R
10) an end and an end of load (RL) connect; The tenth resistance (R
10) the other end be connected with the negative pole of indicator light (LED); The other end of the positive pole of indicator light (LED), load (RL) all is connected with the N end of AC220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201585310U CN201717602U (en) | 2010-04-14 | 2010-04-14 | Noise-proof type anti-electric touch and anti-overheating protector of electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201585310U CN201717602U (en) | 2010-04-14 | 2010-04-14 | Noise-proof type anti-electric touch and anti-overheating protector of electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717602U true CN201717602U (en) | 2011-01-19 |
Family
ID=43463608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201585310U Expired - Fee Related CN201717602U (en) | 2010-04-14 | 2010-04-14 | Noise-proof type anti-electric touch and anti-overheating protector of electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717602U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566619A (en) * | 2012-02-07 | 2012-07-11 | 宁波市镇海华泰电器厂 | Noise type water temperature control device |
| CN102591243A (en) * | 2012-03-21 | 2012-07-18 | 成都前锋电子有限责任公司 | Automatic control circuit of water heater |
| CN104374032A (en) * | 2014-09-30 | 2015-02-25 | 潘浩斌 | Novel ultrasonic humidifier |
| CN104661417A (en) * | 2015-03-24 | 2015-05-27 | 浙江中烟工业有限责任公司 | Fault detect device for high-power illuminating system |
| CN105738002A (en) * | 2014-12-24 | 2016-07-06 | 精工半导体有限公司 | Overheat detection circuit and semiconductor device |
-
2010
- 2010-04-14 CN CN2010201585310U patent/CN201717602U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566619A (en) * | 2012-02-07 | 2012-07-11 | 宁波市镇海华泰电器厂 | Noise type water temperature control device |
| CN102566619B (en) * | 2012-02-07 | 2013-12-25 | 宁波市镇海华泰电器厂 | Noise type water temperature control device |
| CN102591243A (en) * | 2012-03-21 | 2012-07-18 | 成都前锋电子有限责任公司 | Automatic control circuit of water heater |
| CN104374032A (en) * | 2014-09-30 | 2015-02-25 | 潘浩斌 | Novel ultrasonic humidifier |
| CN105738002A (en) * | 2014-12-24 | 2016-07-06 | 精工半导体有限公司 | Overheat detection circuit and semiconductor device |
| CN105738002B (en) * | 2014-12-24 | 2020-03-03 | 艾普凌科有限公司 | Overheat detection circuit and semiconductor device |
| CN104661417A (en) * | 2015-03-24 | 2015-05-27 | 浙江中烟工业有限责任公司 | Fault detect device for high-power illuminating system |
| CN104661417B (en) * | 2015-03-24 | 2017-05-03 | 浙江中烟工业有限责任公司 | Fault detect device for high-power illuminating system |
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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: 20110119 Termination date: 20130414 |