CN2889105Y - Electronic dry-heating proof device of drinking water machine - Google Patents
Electronic dry-heating proof device of drinking water machine Download PDFInfo
- Publication number
- CN2889105Y CN2889105Y CN 200620101721 CN200620101721U CN2889105Y CN 2889105 Y CN2889105 Y CN 2889105Y CN 200620101721 CN200620101721 CN 200620101721 CN 200620101721 U CN200620101721 U CN 200620101721U CN 2889105 Y CN2889105 Y CN 2889105Y
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- metal tube
- water
- chip microcomputer
- switch
- resistance
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Abstract
An electric device for preventing dry-heating of water dispenser includes a singlechip; a detecting unit composed of a first and a second metal pipe spaced from each other and mounted between the water hopper and the heating unit in series; a driving circuit including a first resistance with one end connected with positive pole of power supply and the other end electrically connected with signal detecting terminal of the singlechip, and a switch controlled by a singlechip. The second metal pipe is connected with negative pole of power supply via the switch. With the structure aforementioned, a current loop is formed to make the singlechip detect whether the water dispenser in lack in water. The utility model has the advantages of low production cost, high safety, easy mounting, and no influence on water quality, therefore being worth applying to various existing water dispensers.
Description
Technical field
The utility model relates to a kind of water dispenser, especially refers to a kind of anti-parching device for drinking device.
Background technology
Existing water dispenser heating system comprises heater circuit and heater, in order to prevent that water dispenser from heating under anhydrous state, anti-dry burning device is installed on heating system usually, the employing that this anti-dry burning device has is connected on the mechanical thermostat in the heater circuit, and what also have sets up water level switch in heater.Adopt such scheme, though can reach the purpose of anti-dry to a certain extent, in use find: the former is when disconnecting heater circuit, and the temperature in its heater is but very high, therefore still exists potential safety hazard.And the latter's anti-dry burning device is made up of tongue tube, the foaming ball float the hollow plastic guide rod of tongue tube being installed and being had magnet usually.Apparatus structure complexity, volume that can be such is big, cost is high; Also can't be installed in simultaneously on the heating container wall of drinking water apparatus with no heat bag; Moreover tongue tube breaks in transportation easily; Easy water inlet that the ball float use is of a specified duration can not be floated reliably; Ball float and plastic guides rupture easily and drainage occurs because of heating, be soaked in the water for a long time, also cause the secondary pollution of water quality simultaneously.The anti-dry circuit that therefore present mechanical thermostat is formed can't reach the anti-dry purpose veritably.And can not reliably be used for a long time by the anti-dry burning device that water level switch is formed, so existing anti-parching device for drinking device still need remain further to be improved.
Summary of the invention
Technical problem to be solved in the utility model is the defective at prior art, and a kind of water quality that neither influences is provided, again reliable operation, water dispenser electronics anti-dry burning device that cost is low.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this water dispenser electronics anti-dry burning device comprises checkout gear, but drive circuit and open detection circuit and programmable single-chip microcomputer, wherein, described checkout gear is to be contained in first metal tube on the water pipe between water dispenser bucket and the heater by going here and there at interval, second metal tube is formed, described drive circuit comprises that again an end is connected in first resistance of positive source and is controlled by the switch that above-mentioned single-chip microcomputer opens and closes, and described first metal tube is electrically connected mutually with the other end of described first resistance and the signal detection end of described single-chip microcomputer respectively, and described second metal tube then links to each other with the negative pole of power supply by described switch.
As further improvement of the utility model, described switch can be a triode, and the base stage of this triode is connected in the control signal output of described single-chip microcomputer by second resistance.Can certainly adopt other identical switch of function.
As another kind of improvement the of the present utility model, can also comprise the soft lead that is electrically connected usefulness, the two ends of this lead are respectively equipped with conductive contact and plug, and be fixed with respectively on described first metal tube and second metal tube and the above-mentioned conductive contact conduction inserted sheet of inserting mutually, then be provided with the socket that is complementary with above-mentioned plug on the circuit board of fixing above-mentioned resistance and switch.When being electrically connected like this, convenient, quick.
Compared with prior art, because the utility model adopts the hardware circuit of programmable single-chip microcomputer, electronic component formation and the checkout gear that metal tube is formed, after utilizing water to pass through each metal tube, make positive source successively by behind first resistance, first metal tube, water, second metal tube, the switch and form current path between the power cathode, the voltage signal that utilizes the signal detection end of single-chip microcomputer to be obtained is again judged whether lack of water of water dispenser, and makes corresponding action according to testing result.Therefore the utility model cost is low, and stable performance is safe in utilization, reliable, and it is convenient to install simultaneously again, can also guarantee effectively that water quality is not contaminated, so the utility model is worth applying on existing all kinds of water dispensers.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment;
Fig. 2 is the structural representation of checkout gear among the utility model embodiment;
Fig. 3 is the structural representation of lead among the utility model embodiment.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, but this water dispenser electronics anti-dry burning device comprises checkout gear, drive circuit and open detection circuit and programmable single-chip microcomputer IC, wherein, checkout gear is made up of first metal tube 2 and second metal tube 3, here, this two metal tube adopts stainless steel tube, after usefulness silicone tube 4 connects between the two, string is contained on the water pipe 5 between water dispenser bucket and the heater again, just is space and not touching mutually between first metal tube 2 and second metal tube 3.Described drive circuit comprises that again an end is connected in first resistance R 1 of positive source and is controlled by the switch that above-mentioned single-chip microcomputer IC opens and closes, in the present embodiment, supply voltage is 5 volts, it is the chip of GMS87C1508 that single-chip microcomputer adopts model, switch adopts triode Q, the first above-mentioned metal tube 2 is electrically connected mutually with the other end of first resistance R 1 and the signal detection end of single-chip microcomputer IC respectively, and by ceramic disc capacitor C ground connection.Second metal tube 3 then links to each other with the colelctor electrode of triode Q, and the emitter stage of triode Q links to each other with the negative pole of power supply, and the base stage of triode Q is connected in the control signal output of described single-chip microcomputer IC by second resistance R 2.
For make be electrically connected convenient, in the present embodiment, also is furnished with soft lead 8, the two ends of this soft lead have conductive contact 9 and plug 7 respectively, and be welded with respectively on above-mentioned first metal tube 2 and second metal tube 3 and the above-mentioned conductive contact 9 conduction inserted sheet 6 of inserting mutually, then be provided with the socket 1 that is complementary with above-mentioned plug 7 on the circuit board of fixing above-mentioned resistance and triode.
During use, after bucket adds water, be full of water in the whole pipeline, first metal tube 2 fully contacts with water respectively with second metal tube 3.Under heating system is in not heated state, low level signal of program output among the single-chip microcomputer IC, at this moment, triode Q is in cut-off state, so, be in open-circuit condition by the circuit that forms between positive source, first resistance R 1, first metal tube 2, water, second metal tube 3, triode Q, the power cathode, the circuit no current flows through, and has guaranteed that so reliably water quality is not subjected to the influence of long-time electrolysis.And this moment, the signal detection end of single-chip microcomputer records magnitude of voltage and (should be 5 volts in theory, but actual measurement is about 4.5 volts) about 4.5 volt.When heating system begins to heat, the control signal output of single-chip microcomputer and switching signal control end produce a high level signal immediately, make triode Q enter the saturation conduction state, just have electric current to flow through in the circuit that forms between above-mentioned positive source, first resistance R 1, first metal tube 2, water, second metal tube 3, triode Q, the power cathode.If water level just often, the signal detection end of single-chip microcomputer records magnitude of voltage (because of the water quality difference, detected voltage is difference to some extent) about 1.5 volts, and single-chip microcomputer is analyzed detected voltage value and Data Format Transform, by the program comparative analysis, can draw the conclusion of water.If in heating process, anhydrous phenomenon takes place in the pipeline, the magnitude of voltage that records of signal detection end of single-chip microcomputer (should be 5 volts in theory, but survey about 4.5 volts) about 4.5 volts this moment.Equally, single-chip microcomputer is analyzed detected voltage value and Data Format Transform, by the program comparative analysis, can draw anhydrous conclusion.
When actual detected, program is carried out voltage detecting to this signal detection end usually repeatedly, if when continuing to maintain certain magnitude of voltage in 1 second, program has finally judged whether water.If when program thinks anhydrous, then can cut away the power supply of heating system automatically, make it to stop fully heating, thereby reach the purpose that prevents anhydrous dry combustion method.
When above-mentioned electronics anti-dry burning device is installed in the drinking water apparatus with no heat bag, after drinking water apparatus with no heat bag begins heating, water in the water pipe is to flow always, time of contacting with each metal tube of water is very short like this, the electric current that flows through water is a microampere order, so water quality can be ignored by the possibility of electrolysis, we can say that this electronics anti-dry burning device does not influence water quality.
Claims (3)
1, a kind of water dispenser electronics anti-dry burning device, it is characterized in that comprising checkout gear, but drive circuit and open detection circuit and programmable single-chip microcomputer (IC), wherein, described checkout gear is to be contained in first metal tube (2) on the water pipe between water dispenser bucket and the heater by going here and there at interval, second metal tube (3) is formed, described drive circuit comprises that again an end is connected in first resistance (R1) of positive source and is controlled by the switch that above-mentioned single-chip microcomputer opens and closes, and described first metal tube is electrically connected mutually with the other end of described first resistance (R1) and the signal detection end of described single-chip microcomputer (IC) respectively, and described second metal tube (3) then links to each other with power cathode by described switch.
2, water dispenser electronics anti-dry burning device according to claim 1 is characterized in that: described switch is a triode (Q), and the base stage of this triode is connected in the control signal output of described single-chip microcomputer (IC) by second resistance (R2).
3, water dispenser electronics anti-dry burning device according to claim 1 and 2, its spy is: also comprise the soft lead (8) that is electrically connected usefulness, the two ends of this lead are respectively equipped with conductive contact (9) and plug (7), and be fixed with respectively on described first metal tube (2) and second metal tube (3) and above-mentioned conductive contact (9) the conduction inserted sheet (6) of inserting mutually, then be provided with the socket (1) that is complementary with above-mentioned plug (7) on the circuit board of fixing above-mentioned resistance and switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620101721 CN2889105Y (en) | 2006-03-16 | 2006-03-16 | Electronic dry-heating proof device of drinking water machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620101721 CN2889105Y (en) | 2006-03-16 | 2006-03-16 | Electronic dry-heating proof device of drinking water machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2889105Y true CN2889105Y (en) | 2007-04-18 |
Family
ID=38019757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620101721 Expired - Fee Related CN2889105Y (en) | 2006-03-16 | 2006-03-16 | Electronic dry-heating proof device of drinking water machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2889105Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789582A (en) * | 2010-04-14 | 2010-07-28 | 宁波市镇海华泰电器厂 | Electric water heater protection device |
| CN101794982A (en) * | 2010-04-14 | 2010-08-04 | 宁波市镇海华泰电器厂 | Anti-parching device for drinking device |
| CN106382213A (en) * | 2016-11-04 | 2017-02-08 | 祝晶晶 | Automatic water pump controller |
-
2006
- 2006-03-16 CN CN 200620101721 patent/CN2889105Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789582A (en) * | 2010-04-14 | 2010-07-28 | 宁波市镇海华泰电器厂 | Electric water heater protection device |
| CN101794982A (en) * | 2010-04-14 | 2010-08-04 | 宁波市镇海华泰电器厂 | Anti-parching device for drinking device |
| CN101789582B (en) * | 2010-04-14 | 2012-07-04 | 宁波市镇海华泰电器厂 | Electric water heater protection device |
| CN106382213A (en) * | 2016-11-04 | 2017-02-08 | 祝晶晶 | Automatic water pump controller |
| CN106382213B (en) * | 2016-11-04 | 2018-02-13 | 祝晶晶 | Automatic pump controller |
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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: 20070418 Termination date: 20120316 |