CN108168652A - A kind of household electrical appliance water level detecting and controlling circuit - Google Patents
A kind of household electrical appliance water level detecting and controlling circuit Download PDFInfo
- Publication number
- CN108168652A CN108168652A CN201711295130.2A CN201711295130A CN108168652A CN 108168652 A CN108168652 A CN 108168652A CN 201711295130 A CN201711295130 A CN 201711295130A CN 108168652 A CN108168652 A CN 108168652A
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- China
- Prior art keywords
- resistance
- feet
- connect
- operational amplifier
- power supply
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
Abstract
The present invention provides a kind of household electrical appliance water level detecting and controlling circuit, including capacitance C1, resistance R1, resistance R2, resistance R3, operational amplifier chip U1 and power supply；Capacitance C1 includes tank, the both sides of tank are provided with copper sheet COPPER1 and copper sheet COPPER2, one end ground connection of capacitance C1, the other end connect with 2 feet of operational amplifier chip U1, and the one end of 3 feet of operational amplifier chip U1 respectively with resistance R1, resistance R2 and resistance R3 is connect, 8 feet are connect with power supply, 1 foot connects control circuit output terminal, 4 feet ground connection, and the other end of resistance R1 is connect with power supply, another termination control circuit output terminal of resistance R2, the other end ground connection of resistance R3.Compared with prior art, the beneficial effects of the present invention are：The present invention is using conventional component combination, permanent magnet buoy in the mechanical contact point and container without tongue tube, can be to avoid because leading to machine failure during tongue tube contact point aging and simplifying product structure.
Description
Technical field
The present invention relates to automatic control circuit technical field more particularly to a kind of household electrical appliance water level detecting and controlling circuits.
Background technology
At present, as household electrical appliances are intelligentized universal, the structure practicability of household electrical appliance water level detecting and controlling circuit, is this skill
An emphasis in art field；But the method for general household electrical appliance water level detecting is the side combined using tongue tube with permanent magnet
Method, reed switch contact are mechanical structure, and the easy aging in contact generates loose contact, leads to product failure.And its is complicated --
It is combined in container with magnet buoy with the tongue tube of container bottom.This control circuit is not had using conventional component combination
Permanent magnet buoy in the mechanical contact point and container of tongue tube, can to avoid because causing machine to lose during tongue tube contact point aging
Effect and simplified product structure.
Invention content
To solve the above problems, the invention discloses a kind of household electrical appliance water level detecting and controlling circuits.
In order to reach object above, the present invention provides following technical solution：
A kind of household electrical appliance water level detecting and controlling circuit, it is characterised in that：Including capacitance C1, resistance R1, resistance R2, resistance R3,
Operational amplifier chip U1 and power supply；The capacitance C1 includes tank, and the both sides of the tank are provided with copper sheet
One end of COPPER1 and copper sheet COPPER2, the capacitance C1 are grounded, and the other end is connect with 2 feet of operational amplifier chip U1,
The one end of 3 feet of the operational amplifier chip U1 respectively with resistance R1, resistance R2 and resistance R3 is connect, and 8 feet connect with power supply
It connects, 1 foot connects control circuit output terminal, 4 feet ground connection, and the other end of the resistance R1 is connect with power supply, and the resistance R2's is another
Termination control line road output terminal, the other end ground connection of the resistance R3.
Further, the power supply is+5V power supplys.
Further, the operational amplifier chip U1 is LM358 operational amplifier chips.
Further, the resistance R1, resistance R2 and resistance R3 are 100K Ω.
Compared with prior art, the beneficial effects of the present invention are：The present invention is combined using conventional component, without
Permanent magnet buoy in the mechanical contact point and container of tongue tube, can be to avoid because leading to machine failure during tongue tube contact point aging
With simplified product structure.
Description of the drawings
Fig. 1 is a kind of circuit diagram of household electrical appliance water level detecting and controlling circuit of the present invention.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
As shown in the figure, a kind of household electrical appliance water level detecting and controlling circuit, including capacitance C1, resistance R1, resistance R2, resistance
R3, operational amplifier chip U1 and power supply；Capacitance C1 includes tank, and the both sides of tank are provided with copper sheet COPPER1
With copper sheet COPPER2, one end of the capacitance C1 is grounded, and the other end is connect with 2 feet of operational amplifier chip U1, operation amplifier
The one end of 3 feet of device chip U1 respectively with resistance R1, resistance R2 and resistance R3 is connect, and 8 feet are connect with power supply, and 1 foot connects control
Line output, 4 feet ground connection, the other end of resistance R1 are connect with power supply, another termination control circuit output terminal of resistance R2, electricity
Hinder the other end ground connection of R3.
In the present embodiment, the power supply is+5V power supplys.
Wherein, preferred parameter of the invention is：Operational amplifier chip U1 be LM358 operational amplifier chips, resistance R1,
Resistance R2 and resistance R3 is 100K Ω, and OUT is the output terminal of this control circuit.
The operation principle of the present embodiment is as follows：
Copper sheet COPPER1 and copper sheet COPPER2 is placed in tank both sides by lead welding, is using the water in tank
Medium forms capacitance C1, and C1 and operational amplifier chip U1 and its peripheral components resistance R1, resistance R2 and resistance R3 groups
Into a square-wave generator, when there is water in container, there is capacity between two copper sheets, square-wave generator work generates a square wave
To the output terminal OUT of control circuit, when not having water in container, it is stopped between two copper sheets without capacity, square-wave generator,
The output terminal OUT of control circuit is just exported without square wave, so as to achieve the purpose that identify water level in container.
The technical means disclosed in the embodiments of the present invention is not limited only to the technological means disclosed in the above embodiment, further includes
By more than technical characteristic arbitrarily the formed technical solution of combination.It should be pointed out that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (4)
1. a kind of household electrical appliance water level detecting and controlling circuit, it is characterised in that：Including capacitance C1, resistance R1, resistance R2, resistance
R3, operational amplifier chip U1 and power supply；The capacitance C1 includes tank, and the both sides of the tank are provided with copper sheet
One end of COPPER1 and copper sheet COPPER2, the capacitance C1 are grounded, and the other end is connect with 2 feet of operational amplifier chip U1,
The one end of 3 feet of the operational amplifier chip U1 respectively with resistance R1, resistance R2 and resistance R3 is connect, and 8 feet connect with power supply
It connects, 1 foot connects control circuit output terminal, 4 feet ground connection, and the other end of the resistance R1 is connect with power supply, and the resistance R2's is another
Termination control line road output terminal, the other end ground connection of the resistance R3.
2. a kind of household electrical appliance water level detecting and controlling circuit according to claim 1, it is characterised in that：The power supply for+
5V power supplys.
3. a kind of household electrical appliance water level detecting and controlling circuit according to claim 1, it is characterised in that：The operation amplifier
Device chip U1 is LM358 operational amplifier chips.
4. a kind of household electrical appliance water level detecting and controlling circuit according to claim 1, it is characterised in that：The resistance R1,
Resistance R2 and resistance R3 is 100K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295130.2A CN108168652A (en) | 2017-12-08 | 2017-12-08 | A kind of household electrical appliance water level detecting and controlling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295130.2A CN108168652A (en) | 2017-12-08 | 2017-12-08 | A kind of household electrical appliance water level detecting and controlling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108168652A true CN108168652A (en) | 2018-06-15 |
Family
ID=62525506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711295130.2A Pending CN108168652A (en) | 2017-12-08 | 2017-12-08 | A kind of household electrical appliance water level detecting and controlling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108168652A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145927A (en) * | 1977-11-10 | 1979-03-27 | Larson Roger G | Apparatus for determining the liquid level in a tank |
| CN2077118U (en) * | 1990-07-20 | 1991-05-15 | 北京工业大学电子厂 | Capacitance type fluid level electrode group for detecting liquid level |
| CN101738241A (en) * | 2008-11-17 | 2010-06-16 | 何礼高 | Capacitive water level measuring apparatus for solar water heater |
| CN105538913A (en) * | 2014-10-22 | 2016-05-04 | 多佛欧洲有限责任公司 | Device for measuring a level in a tank |
| CN105823527A (en) * | 2016-05-17 | 2016-08-03 | 苏州博众精工科技有限公司 | Liquid level height detection alarm |
-
2017
- 2017-12-08 CN CN201711295130.2A patent/CN108168652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145927A (en) * | 1977-11-10 | 1979-03-27 | Larson Roger G | Apparatus for determining the liquid level in a tank |
| CN2077118U (en) * | 1990-07-20 | 1991-05-15 | 北京工业大学电子厂 | Capacitance type fluid level electrode group for detecting liquid level |
| CN101738241A (en) * | 2008-11-17 | 2010-06-16 | 何礼高 | Capacitive water level measuring apparatus for solar water heater |
| CN105538913A (en) * | 2014-10-22 | 2016-05-04 | 多佛欧洲有限责任公司 | Device for measuring a level in a tank |
| CN105823527A (en) * | 2016-05-17 | 2016-08-03 | 苏州博众精工科技有限公司 | Liquid level height detection alarm |
Non-Patent Citations (2)
| Title |
|---|
| 武汉莱斯特电子科技有限公司: "《电子装配技能训练》", 31 December 2015 * |
| 郝宁眉 等: "《电工电子技术实验与实习》", 31 October 2006, 中国石油大学出版社 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180615 |
|
| RJ01 | Rejection of invention patent application after publication |