CN202030952U - Water level detection circuit for washing machine steam generator - Google Patents
Water level detection circuit for washing machine steam generator Download PDFInfo
- Publication number
- CN202030952U CN202030952U CN2010206923313U CN201020692331U CN202030952U CN 202030952 U CN202030952 U CN 202030952U CN 2010206923313 U CN2010206923313 U CN 2010206923313U CN 201020692331 U CN201020692331 U CN 201020692331U CN 202030952 U CN202030952 U CN 202030952U
- Authority
- CN
- China
- Prior art keywords
- circuit
- water level
- steam generator
- detection circuit
- washing machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a water level detection circuit for a washing machine steam generator, which relates to washing machines. The detection circuit comprises two transistors Q10 and Q11. An oscillation circuit is formed by the combination of the two transistors with capacitors. The output of the oscillation circuit flows through two electrode sensors. The detection circuit also comprises an amplification circuit and the amplification circuit is formed by triodes Q8 and Q9 connected into a Darlington circuit. The oscillation circuit is also connected with another speaker amplification circuit. The speaker is pushed by the transistor Q12. The whole circuit is powered by 9 v electricity. The two electrode sensors are arranged inside a steam generator, wherein one electrode sensor is used for determining high water levels and the other electrode sensor is used for determining low water levels so as to realize the water level control for the steam generator. Since an alternating current (AC) flows through the electrodes, so that the formation of oxide films is avoided. Therefore, the long-term operation of the whole detection device can be effectively performed.
Description
Technical field
The utility model belongs to a kind of application circuit, particularly a kind of water level detection circuit that is applied on the washing machine.
Background technology
The needs that washing machine is washed for steam contain a steam generator.The operation principle of this steam generator is a built-in heating tube, and a water inlet is arranged, and advances water by water intaking valve, also has two devices of judging water level in addition, a high water level, and a low water level, low water level is on heating tube.
Steam generator is controlled by washing machine controller, at first controls water intake valve, when intaking high water level, stops into water and opens heating tube and heat, and will produce steam when water is heated to boiling.Along with the generation of steam, water level reduces, and stops heating when being reduced to low water level, carries out moisturizing, and so circulation will be gone into the course of work of complete steam generator.
The detection control circuit of concrete water level, traditional use level sensor and water level switch are controlled, but because the structure of washing machine needs, steam generator compares less, this just causes water level lower, the control accuracy of level sensor and water level switch can not satisfy the demands, another is exactly an electric conductivity of utilizing water, cross DC current by circuit flow and judge water level, this scheme cost is low, the precision height, but owing to will cause electrode to be in the plating state, form layer oxide film at electrode surface easily.Because oxide-film is non-conductive, sensor can be ineffective, causes whole testing circuit cisco unity malfunction.
The utility model content
This patent provides a new circuit in order to overcome above-mentioned shortcoming, is to flow through alternating current in the electrode, thereby can not forms oxide-film, guarantees the long-term operate as normal that sensed water level is judged.
Sort circuit contains two transistor Q10, Q11, form oscillating circuit in conjunction with holding resistor, its output two electrode sensors of flowing through, also contain the amplifying circuit that the triode Q8 that connects into Darlington circuit and Q9 form in the circuit, oscillating circuit also connects another loudspeaker amplifying circuit transistor Q12 and promotes loudspeaker, and entire circuit is with the power supply of 9V electricity.
Two electrode sensors of circuit of the present utility model can be arranged in the steam generator, a pair of judgement high water level, and low water level is judged by another team, realizes level in steam generator is controlled.Because what flow through in the electrode is alternating current, can not form oxide-film, can make the permanently effective work of whole detection device.
Description of drawings
Fig. 1, circuit specific embodiment of the present utility model.
The specific embodiment
Fig. 1 is a concrete application examples of the present utility model.
As figure, two NPN transistor Q10 and Q11 and hold resistor and form an oscillating circuit, specifically: the base stage of transistor Q10 connects the colelctor electrode of transistor Q11, two transistor emitter grounding.Be convenient to user's operation for the visuality that improves circuit, on the colelctor electrode of transistor Q10, connect a light emitting diode D18.This oscillating circuit connects two electrode sensors.
Also have two transistor Q8, Q9 to form Darlington circuit, connect electrode, also be provided with a PNP transistor Q12 between oscillating circuit and the Darlington circuit and constitute other loudspeaker amplifying circuit, be used for promoting loudspeaker and send loud sound as amplifier.Entire circuit is powered with the 9V power supply.
During the utility model circuit working, power supply is by the Darlington circuit amplification, through the oscillating circuit starting of oscillation, and what flow through on two electrodes is alternating current, can not form oxide-film.Loudspeaker and light emitting diode also can be made corresponding acousto-optic hint, the user's that is more convenient for operation.
Cooperate this circuit, electrode sensor uses the stainless steel of diameter 10 ~ 16mm to make, and perhaps also can use the metal material of other excellent conductive performances.
Claims (1)
1. the water level detection circuit of a washing machine steam generator, it is characterized in that: contain two transistor Q10, Q11, form oscillating circuit in conjunction with holding resistor, its output two electrode sensors of flowing through, also contain the amplifying circuit that the triode Q8 that connects into Darlington circuit and Q9 form in the circuit, oscillating circuit also connects another loudspeaker amplifying circuit transistor Q12 and promotes loudspeaker, and entire circuit is with the power supply of 9V electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206923313U CN202030952U (en) | 2010-12-31 | 2010-12-31 | Water level detection circuit for washing machine steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206923313U CN202030952U (en) | 2010-12-31 | 2010-12-31 | Water level detection circuit for washing machine steam generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202030952U true CN202030952U (en) | 2011-11-09 |
Family
ID=44893255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206923313U Expired - Fee Related CN202030952U (en) | 2010-12-31 | 2010-12-31 | Water level detection circuit for washing machine steam generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202030952U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930056A (en) * | 2017-03-22 | 2017-07-07 | 无锡小天鹅股份有限公司 | Washing machine and its detergent detection means |
| CN109238397A (en) * | 2017-07-10 | 2019-01-18 | 广州康昕瑞基因健康科技有限公司 | liquid detecting circuit |
-
2010
- 2010-12-31 CN CN2010206923313U patent/CN202030952U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930056A (en) * | 2017-03-22 | 2017-07-07 | 无锡小天鹅股份有限公司 | Washing machine and its detergent detection means |
| CN106930056B (en) * | 2017-03-22 | 2020-04-14 | 无锡小天鹅电器有限公司 | Washing machine and detergent detection device thereof |
| CN109238397A (en) * | 2017-07-10 | 2019-01-18 | 广州康昕瑞基因健康科技有限公司 | liquid detecting circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202433335U (en) | Atomization piece water shortage sensing detection circuit of humidifier | |
| CN204389660U (en) | A kind of electronic load device based on field effect tubular type | |
| CN103411287B (en) | The anti-dry system of a kind of humidifier | |
| CN202030952U (en) | Water level detection circuit for washing machine steam generator | |
| CN103829775B (en) | A kind of human body is near the electric cooker control panel of inductive operation | |
| CN201867443U (en) | Home appliance and mains supply strong current signal detection circuit thereof | |
| CN105784056B (en) | Current control circuit and electrode level monitoring device | |
| CN202205113U (en) | Heating control device for instant heating type heating member | |
| CN203755035U (en) | Program controller for washing machine | |
| CN114740773A (en) | Wireless steam cleaner circuit | |
| CN206468568U (en) | Rotation speed of the fan temperature-control circuit | |
| CN203735971U (en) | Electric cooker control panel operated by human body close induction | |
| CN209118098U (en) | Electric tool intelligent control circuit with energy conservation and unloaded low noise | |
| CN107749149A (en) | A kind of detection alarm for being used for flammable toxic gas in environment | |
| CN209592617U (en) | A kind of level meter mode of laser group driving circuit | |
| CN204129483U (en) | A kind of material smell reproduction control system | |
| CN203520197U (en) | Temperature controller used for sewage processing | |
| CN203787687U (en) | Cut-off type power-saving socket | |
| CN207317899U (en) | A kind of reservoir level detection device | |
| CN102661984B (en) | Control circuit based on life extension of multichannel electrochemical sensor | |
| CN105783170A (en) | Self-control humidifier | |
| CN218068620U (en) | Wireless steam cleaner circuit | |
| CN202382430U (en) | Energy saving control device of water heater | |
| CN207164163U (en) | A kind of electric power overhaul measuring device with electricity | |
| CN204530277U (en) | A kind of novel touch electricity-saving flatiron |
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: 20111109 Termination date: 20111231 |