CN101380617A - Water shortage protection method of ultrasonic nobulizer - Google Patents
Water shortage protection method of ultrasonic nobulizer Download PDFInfo
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- CN101380617A CN101380617A CNA2008102186194A CN200810218619A CN101380617A CN 101380617 A CN101380617 A CN 101380617A CN A2008102186194 A CNA2008102186194 A CN A2008102186194A CN 200810218619 A CN200810218619 A CN 200810218619A CN 101380617 A CN101380617 A CN 101380617A
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Abstract
The invention provides a method for water shortage protection of an ultrasonic-wave atomizer, which comprises an energy conversion sheet of an atomizer and a control circuit for transmitting a high-frequency signal to the energy conversion sheet, wherein, the high-frequency signal in the energy conversion sheet is input into a loop to be connected with a sense resistor R1 in series; the control circuit collects voltage changes on two ends of the sense resistor; when the voltage on the two ends of the sense resistor is apparently higher than a standard value, the control circuit stops transmitting the high-frequency signal to the energy conversion sheet; a signal processing circuit collects the voltage changes on the two ends of the sense resistor R1, and transmits a sensed voltage data signal to the control circuit. The standard value is a mean value of voltage on the two ends of the sense resistor R1 or preset data when the energy conversion sheet can work normally. The method increases sense liquid level controlled by the corresponding circuit, and can not be restricted by the conductivity of atomized liquid, so that the method can be widely applied to the device with atomized liquid such as water, aromatizer, lotion, liquid medicine, liquid preparation, alcohol, etc.
Description
Technical field
The present invention relates to the ultrasonic ultrasonic delay line memory technical field, particularly the excessive low water level protection technical field of ultrasonic ultrasonic delay line memory.
Background technology
Be used for humidification, perfuming, sterilization or ornamental supersonic atomizer in the daily life, the ultrasonic wave that the liquid that is contained in the liquid container can be produced by supersonic generator is the atomization of liquid, thereby realizes its atomizing functions.In these atomising devices, generally all be provided with automatic liquid level detector and controller, thereby can detect the liquid level that is atomized liquid automatically, particularly when liquid soon exhausts, must quit work immediately, otherwise the transducing sheet of vibration at high speed with regard to might because lack of water and can not secure heat dissipation so that dry combustion method damage.Traditional ultrasonic ultrasonic delay line memory damages transducer in order to ensure transducer does not produce dry combustion method under anhydrous situation, the method of the excessive low water level protection that adopts has: 1. resistance-type excessive low water level protection mode, protect transducer by the resistance of measuring water, can measure the resistance of water outlet by two electrodes when promptly water being arranged, resistance value is bigger when anhydrous, and the control atomizer quits work; 2. condenser type excessive low water level protection mode, by capacitance different the judged whether water of water when anhydrous are arranged between two electrodes, when anhydrous, the control atomizer quits work; China Patent No. CN02248840.5 for example, name is called the control structure that is adopted in the utility model patent of " ultrasonic ultrasonic delay line memory level sensor "; 3. magnetic red tubular type excessive low water level protection mode is controlled the break-make of magnetic red pipe by the magnet on bubbling through the water column, thereby reaches control atomizer work and idle purpose.China Patent No. CN 02271748.X for example, name is called the control structure that is adopted in the utility model patent of " the miniature ultrasonic atomizer that adopts magnetic inducted level switch ".
The shortcoming that above-mentioned these prior aries exist is also very obvious.1. complex structure must have that accessory is auxiliary on the structure could realize; 2. reliability is low, and resistance and condenser type excessive low water level protection can lose efficacy and burn out atomizer when hanging water and having conductive materials to adhere to, and magnetic red tubular type excessive low water level protection mode can produce the result of inefficacy when the magnet of bubbling through the water column is blocked by foreign matter; 3. the scope of application is restricted; resistance-type and condenser type excessive low water level protection device only are applicable to the liquid of certain electrical conductivity; hour can't work very much; atomizer can't quit work because of adhering to conductive materials on the water column when too big, and the magnetic red tubular type then is subjected to the restriction in structure and space and makes its scope of application only limit to the humidifier in enough spaces.
Summary of the invention
This programme provides a kind of method that realizes the excessive low water level protection of ultrasonic ultrasonic delay line memory without the auxiliary machinery of other liquid level test.Test discovery through us, input under the constant substantially situation of the electric current of atomizer control circuit and voltage at external power, when being atomized liquid and being exhausted substantially on the transducing sheet, about the peak-to-peak value electric current of alternation of transducing sheet of flowing through doubles than the situation that liquid is arranged, be that the transducing sheet is when operate as normal, impedance when the impedance of liquid and no liquid are arranged has bigger difference, though on the transducing sheet behind the knot full water dirt situation also like this.
According to above-mentioned experimental result, we propose a kind of water shortage protection method of ultrasonic ultrasonic delay line memory, comprise the transducing sheet of atomizer, carry the control circuit of high-frequency signal to described transducing sheet; It is characterized in that,
Series connection detects resistance R 1 in the high-frequency signal input circuit of transducing sheet;
Described control circuit picks up the voltage change at described detection resistance R 1 two ends;
When the voltage at described detection resistance R 1 two ends during apparently higher than standard value, described control circuit stops to carry high-frequency signal to give described transducing sheet.
Thereby described transducing sheet be can high-frequency under the driving of high-frequency signal vibration can be with the electrical part of the atomization of liquid.Described control circuit is the control device that can produce high-frequency signal and have corresponding control chip, and the The whole control of atomization process is mainly finished by described control circuit.Described detection resistance R 1 mainly is the electrical part that the current in loop signal is converted to voltage signal, therefore need not to design very greatly in the resistance that detects resistance R 1 described in the work loop of big electric current.Secondly, also can substitute resistive described detection resistance R 1, the current in loop signal is converted to voltage signal as long as promptly can realize with the inductive electrical part.
Further technical scheme can also be, also comprises signal processing circuit, and described signal processing circuit is picked up the voltage change at described detection resistance R 1 two ends and will be sent described control circuit to after the voltage signal arrangement that detect.
Described signal processing circuit mainly is to pick up, put in order the voltage signal at (AC-DC) described detection resistance R 1 two ends.In general, the voltage signal at described detection resistance R 1 two ends is high-frequency pulse signals, if this high-frequency pulse signal directly sends described control circuit to, special high-frequency signal pick device just must be set in the described control circuit, therefore analyze technically, described signal processing circuit is handled the back with signal and is being sent described control circuit to, can make the structure of described control circuit and control procedure simple, and the speed of service is reliable.
Further technical scheme can also be, the mean value of the reflection crest voltage at described detection resistance R 1 two ends when described standard value is described transducing sheet operate as normal.These data can be picked up and calculate in the control procedure of normal atomizing by described control circuit.
Further technical scheme can also be, described standard value is the data of setting in described control circuit in advance.
Further technical scheme can also be, 20% o'clock of the voltage overgauge value at described detection resistance R 1 two ends, and described control circuit stops to carry high-frequency signal to give described transducing sheet.
Further technical scheme can also be that the resistance of described detection resistance R 1 is 0.2 ~ 5.1 Europe.Because the operating current of transducing sheet is bigger,, can cause described resistance R 1 heating serious, the efficient of influence atomizing if the resistance of series connection is excessive.
Beneficial effect of the present invention is:
1. the cooperation on need not frame for movement need only increase corresponding circuit and both can realize control to minimum liquid level;
2. compare with condenser type control method or resistance-type control mode, the conductance that can be atomized liquid limits, and has improved the adaptability that is atomized liquid;
3. the superjacent air space of atomizer and transducing sheet does not have other fluid level control device, can clean atomizer and transducing sheet wherein easily.
Because the present invention has above-mentioned advantage, thereby can be widely used in the device as atomizations of liquid such as water, spices, liquid medicine, liquid preparation, alcohol.
Description of drawings
Fig. 1 is the control circuit schematic diagram that utilizes the present invention to design.
The specific embodiment
Below in conjunction with accompanying drawing, further specify embodiments of the invention.
As shown in Figure 1; a kind of excessive low water level protection control circuit of ultrasonic ultrasonic delay line memory; comprise the transducing signal controlling loop that is composed in series by transducing sheet JH1, capacitor C 1 and first resistance R 1, the resistance value of wherein said first resistance R 1 is 1 Europe, and capacitor C 1 is mainly used in the direct current signal in the filtration circuit.Control circuit 1 can send described control circuit 1 to through arrangement again from the resonant frequency of the described transducing sheet of motion tracking JH1 and after described transducing sheet JH1 carries the high-frequency signal of resonance, signal processing circuit 2 to pick up the terminal voltage signal of described first resistance R 1.When the liquid level that is atomized liquid basic during near described transducing sheet JH1, the variation of described transducing sheet JH1 load causes impedance sharply to change, its high frequency electric of flowing through also sharply rises, when the sudden change of the terminal voltage signal of first resistance R 1 be higher than standard value 25% the time, described control circuit 1 sends signal, stop to carry high frequency electrical signal to described transducing sheet JH1, described transducing sheet JH1 stops vibration.
Claims (7)
1. the water shortage protection method of ultrasonic ultrasonic delay line memory comprises the transducing sheet of atomizer, carries the control circuit of high-frequency signal to described transducing sheet; It is characterized in that,
Series connection detects resistance R 1 in the high-frequency signal input circuit of transducing sheet;
Described control circuit picks up the voltage change at described detection resistance R 1 two ends;
When the voltage at described detection resistance R 1 two ends during apparently higher than standard value, described control circuit stops to carry high-frequency signal to give described transducing sheet.
2. require the water shortage protection method of 1 described ultrasonic ultrasonic delay line memory according to power; it is characterized in that; also comprise signal processing circuit, described signal processing circuit is picked up the voltage change at described detection resistance R 1 two ends and will be sent described control circuit to after the voltage signal arrangement that detect.
3. require the water shortage protection method of 1 or 2 described ultrasonic ultrasonic delay line memories according to power, it is characterized in that, the mean value of the reflection crest voltage at described detection resistance R 1 two ends when described standard value is described transducing sheet operate as normal.
4. require the water shortage protection method of 1 or 2 described ultrasonic ultrasonic delay line memories according to power, it is characterized in that, described standard value is the data of setting in described control circuit in advance.
5. require the water shortage protection method of 1 or 2 described ultrasonic ultrasonic delay line memories according to power, it is characterized in that, 20% o'clock of the voltage overgauge value at described detection resistance R 1 two ends, described control circuit stops to carry high-frequency signal to give described transducing sheet.
6. require the water shortage protection method of 1 or 2 described ultrasonic ultrasonic delay line memories according to power, it is characterized in that, the resistance of described detection resistance R 1 is 0.2 ~ 5.1 Europe.
7. require the water shortage protection method of 1 or 2 described ultrasonic ultrasonic delay line memories according to power, it is characterized in that, the resistance of described detection resistance R 1 is 1 Europe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102186194A CN101380617A (en) | 2008-10-24 | 2008-10-24 | Water shortage protection method of ultrasonic nobulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102186194A CN101380617A (en) | 2008-10-24 | 2008-10-24 | Water shortage protection method of ultrasonic nobulizer |
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| Publication Number | Publication Date |
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| CN101380617A true CN101380617A (en) | 2009-03-11 |
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| CNA2008102186194A Pending CN101380617A (en) | 2008-10-24 | 2008-10-24 | Water shortage protection method of ultrasonic nobulizer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954554A (en) * | 2011-08-22 | 2013-03-06 | 北京亚都室内环保科技股份有限公司 | Device and method for protecting humidifier |
| CN103138232A (en) * | 2011-12-02 | 2013-06-05 | 周霆 | Ultrasonic nebulizer water shortage protection circuit |
| CN103411287A (en) * | 2013-06-05 | 2013-11-27 | 佛山市金星徽电器有限公司 | Dry-heating resisting system of humidifier |
| CN104238430A (en) * | 2014-10-09 | 2014-12-24 | 广州市番禺奥迪威电子有限公司 | Parching detecting method and device of atomizing device |
| CN105571060A (en) * | 2015-12-23 | 2016-05-11 | 珠海格力电器股份有限公司 | Humidifier as well as detecting method and device for dry combustion of humidifier |
| CN107606738A (en) * | 2017-09-29 | 2018-01-19 | 康泰医学系统（秦皇岛）股份有限公司 | Ultrasound signal receipt detects circuit and application |
| CN108480119A (en) * | 2018-04-13 | 2018-09-04 | 东莞市泰源电气科技有限公司 | A kind of atomizer with protection circuit |
| CN110262353A (en) * | 2019-07-03 | 2019-09-20 | 佛山恒乐科技有限公司 | A kind of scarce liquid guard method of ultrasonic ultrasonic delay line memory |
| CN112146232A (en) * | 2020-09-15 | 2020-12-29 | 珠海格力电器股份有限公司 | Humidifier and water shortage control method thereof |
| CN116273808A (en) * | 2023-05-16 | 2023-06-23 | 深圳市力生美半导体股份有限公司 | Control method, circuit structure, packaging structure, storage medium and transduction system |
-
2008
- 2008-10-24 CN CNA2008102186194A patent/CN101380617A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954554A (en) * | 2011-08-22 | 2013-03-06 | 北京亚都室内环保科技股份有限公司 | Device and method for protecting humidifier |
| CN102954554B (en) * | 2011-08-22 | 2015-02-25 | 北京亚都环保科技有限公司 | Device and method for protecting humidifier |
| CN103138232A (en) * | 2011-12-02 | 2013-06-05 | 周霆 | Ultrasonic nebulizer water shortage protection circuit |
| CN103411287B (en) * | 2013-06-05 | 2016-06-01 | 佛山市金星徽电器有限公司 | The anti-dry system of a kind of humidifier |
| CN103411287A (en) * | 2013-06-05 | 2013-11-27 | 佛山市金星徽电器有限公司 | Dry-heating resisting system of humidifier |
| CN104238430A (en) * | 2014-10-09 | 2014-12-24 | 广州市番禺奥迪威电子有限公司 | Parching detecting method and device of atomizing device |
| CN104238430B (en) * | 2014-10-09 | 2017-05-24 | 广东奥迪威传感科技股份有限公司 | Parching detecting method and device of atomizing device |
| CN105571060A (en) * | 2015-12-23 | 2016-05-11 | 珠海格力电器股份有限公司 | Humidifier as well as detecting method and device for dry combustion of humidifier |
| CN105571060B (en) * | 2015-12-23 | 2018-12-07 | 珠海格力电器股份有限公司 | Humidifier and its detection method and device of dry combustion method |
| CN107606738A (en) * | 2017-09-29 | 2018-01-19 | 康泰医学系统（秦皇岛）股份有限公司 | Ultrasound signal receipt detects circuit and application |
| CN107606738B (en) * | 2017-09-29 | 2023-08-08 | 康泰医学系统（秦皇岛）股份有限公司 | Ultrasonic signal receiving and detecting circuit and application |
| CN108480119A (en) * | 2018-04-13 | 2018-09-04 | 东莞市泰源电气科技有限公司 | A kind of atomizer with protection circuit |
| CN110262353A (en) * | 2019-07-03 | 2019-09-20 | 佛山恒乐科技有限公司 | A kind of scarce liquid guard method of ultrasonic ultrasonic delay line memory |
| CN112146232A (en) * | 2020-09-15 | 2020-12-29 | 珠海格力电器股份有限公司 | Humidifier and water shortage control method thereof |
| CN116273808A (en) * | 2023-05-16 | 2023-06-23 | 深圳市力生美半导体股份有限公司 | Control method, circuit structure, packaging structure, storage medium and transduction system |
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Open date: 20090311 |