CN204925817U - Capacitanc liquid level controller - Google Patents
Capacitanc liquid level controller Download PDFInfo
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- CN204925817U CN204925817U CN201520511977.XU CN201520511977U CN204925817U CN 204925817 U CN204925817 U CN 204925817U CN 201520511977 U CN201520511977 U CN 201520511977U CN 204925817 U CN204925817 U CN 204925817U
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Abstract
The utility model relates to a capacitanc liquid level controller contains MCU circuit, pump switch circuit, detection of water level circuit, the MCU circuit is to detection of water level electricity charging to change through unit [of measurement] time internal voltage determines the water level condition, and when the water level was less than the default, driven water pump switch circuit made the water pump stop work, and when the water level was higher than the default, driven water pump switch circuit made the water pump work of opening, the water level is confirmed through test capacitor charge time to the detection of water level circuit, capacitanc liquid level controller convenient nimble, the cost is lower, and is small, nos moving part, the reliability is high, does not receive the interference of motor -field, is difficultly snarled, is blockked up by the foreign matter, the product of having stereotyped can change the liquid level settlement or set for many liquid levels point as required easily to can judge liquid level increasing rate by oneself, when the liquid level is ascending too fast, enables the water pump and get into operating condition in advance that assembly process is simple in production.
Description
Technical field
The utility model relates to a kind of improvement of float switch, and refer in particular to a kind of volume little, movement-less part, reliability is high, not by the interference of motor-field, can judge liquid level climbing speed voluntarily, produces the simple capacitance type liquid level controller of assembly technology.
Background technology
In the market submersible pump adopt usually float switch to control the start and stop of submersible pump, existing float switch is generally float-ball type, float type liquid level float switch, they all employ moving component, or volume is larger, or comprise fragile part, probe-type is easily oxidized, and reliability, ease for use etc. are all unsatisfactory.
For this reason, it is little that we have developed a kind of volume, movement-less part, and reliability is high, not by the interference of motor-field, can judge liquid level climbing speed voluntarily, produces the simple capacitance type liquid level controller of assembly technology.
Utility model content
The utility model object is little in order to overcome a kind of volume that the deficiencies in the prior art provide, movement-less part, and reliability is high, not by the interference of motor-field, can judge liquid level climbing speed voluntarily, produces the simple capacitance type liquid level controller of assembly technology.
For achieving the above object, the technical solution adopted in the utility model is: a kind of capacitance type liquid level controller, comprises MCU circuit, pump switch circuit, water level detection circuit; Described MCU circuit charges to water level detection circuit, and judge water level conditions by the change of voltage in measuring unit's time, when water level is lower than preset value, drive pump switch circuit that water pump is quit work, when water level is higher than preset value, pump switch circuit is driven to make water pump unlatching work; Described water level detection circuit determines water level by the Detection capacitance duration of charging.
Preferably, described capacitance type liquid level controller also comprises power supply stabilization circuit; Described power supply stabilization circuit provides a stable power supply for MCU circuit.
Preferably, described capacitance type liquid level controller also comprises water pump current detection circuit; Described water pump current detection circuit is for measuring the electric current of water pump, and when the current overload measured, described MCU control circui pump switch circuit makes water pump at once quit work.
Preferably, described capacitance type liquid level controller also comprises zero cross detection circuit; Described zero cross detection circuit is used for detecting the zero crossing of alternating current sine wave, and drives controllable silicon with this.
Preferably, described water level detection circuit, comprises high water stage testing circuit, middle water level testing circuit, low-water level testing circuit; Described MCU circuit is respectively to high water stage testing circuit, middle water level testing circuit, the charging of low-water level testing circuit, and judge water level conditions respectively by the change of voltage in measuring unit's time, when water level is lower than each self-corresponding preset value, drive pump switch circuit that water pump is quit work, when water level is higher than during to self-corresponding preset value, pump switch circuit is driven to make water pump unlatching work.
Preferably, described power supply stabilization circuit is by resistance R1, and R2, R3, R4 step-down, carries out half-wave rectification by diode D1 and D2 after step-down, then obtains a stable voltage through step-down chip.
Preferably, described zero cross detection circuit is triode Q2, and it is used for detecting zero point, and after zero point being detected, MCU circuit 1 sends pulse to drive pump switch circuit 5.
Preferably, described water pump current detection circuit is by resistance R6, and R7, R8 detect water pump electric current, and wherein resistance R6, R7 are used for sampling, and resistance R8 is used for current limliting; When current is excessive, MCU circuit 1 can switch off the pump immediately.
Preferably, described pump switch circuit, comprises bidirectional triode thyristor Q1, zero cross fired optocoupler U2 and resistance R9, R10; Resistance R9, R10 are used for current limliting, and zero cross fired optocoupler U2 is for driving bidirectional triode thyristor Q1.
Preferably, when water level detection circuit sensed water level, MCU circuit sends high level, described water level detection circuit is respectively by resistance R13, and R14, R15 are to electric capacity C6, C7, C8 charge, and the AD mouth of MCU circuit changes to a certain amount of time used determine water level conditions by measuring AD value.
Due to the utilization of technique scheme, the utility model compared with prior art has following advantages:
Capacitance type liquid level controller described in the utility model is convenient, flexible, and cost is lower, and volume is little, movement-less part, reliability is high, not by the interference of motor-field, is not easily snarled by foreign matter, blocks, the product of having shaped can be as required, level set or setting multi-level point can be changed easily, and liquid level climbing speed can be judged voluntarily, when liquid level rises too fast, water pump can be made to enter duty in advance, produce assembly technology simple.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:
Accompanying drawing 1 is the fundamental diagram of capacitance type liquid level controller described in the utility model;
Accompanying drawing 2 is the Part I circuit diagram of capacitance type liquid level controller described in the utility model;
Accompanying drawing 3 is the Part II circuit diagram of capacitance type liquid level controller described in the utility model;
Accompanying drawing 4 is the Part III circuit diagram of capacitance type liquid level controller described in the utility model;
Accompanying drawing 5 is the Part IV circuit diagram of capacitance type liquid level controller described in the utility model;
Wherein: 1, MCU circuit; 2, power supply stabilization circuit; 3, water pump current detection circuit; 4, zero cross detection circuit; 5, pump switch circuit; 6, high water stage testing circuit; 7, middle water level testing circuit; 8, low-water level testing circuit.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing 1 is capacitance type liquid level controller described in the utility model, comprises MCU circuit 1, power supply stabilization circuit 2, water pump current detection circuit 3, zero cross detection circuit 4, pump switch circuit 5, water level detection circuit; The 1 pair of water level detection circuit charging of described MCU circuit, and judge water level conditions by the change of voltage in measuring unit's time, when water level is lower than preset value, drive pump switch circuit 5 that water pump is quit work, when water level is higher than preset value, pump switch circuit 5 is driven to make water pump unlatching work; Described power supply stabilization circuit 2 provides a stable power supply for MCU circuit 1; Described water pump current detection circuit 3 is for measuring the electric current of water pump, and when the current overload measured, described MCU circuit 1 controls pump switch circuit 5 makes water pump at once quit work; So just effectively can protect the motor of water pump, avoid being burnt.Described zero cross detection circuit 4 is used for detecting the zero crossing of alternating current sine wave, and drives controllable silicon with this, makes complete machine can meet the requirement of EMC.
In the present embodiment, described water level detection circuit, comprises high water stage testing circuit 6, middle water level testing circuit 7, low-water level testing circuit 8; Described MCU circuit 1 charges to high water stage testing circuit 6, middle water level testing circuit 7, low-water level testing circuit 8 respectively, and judge water level conditions respectively by the change of voltage in measuring unit's time, when water level is lower than each self-corresponding preset value, drive pump switch circuit 5 that water pump is quit work, when water level is higher than during to self-corresponding preset value, pump switch circuit 5 is driven to make water pump unlatching work.
Resistance R1 in accompanying drawing 2-5, R2, R3, R4 are used to step-down, carry out half-wave rectification after step-down by diode D1 and D2, then obtain a stable voltage for system through step-down chip.
Triode Q2 is used to detect zero point, and its effect is after zero point being detected, and MCU circuit 1 sends pulse to drive pump switch circuit 5, does like this and effectively can save electric current.
Resistance R6, R7, R8 are used to detect water pump electric current, and R6, R7 are used for sampling, and R8 is used for current limliting.If at operational process, water pump stall or electric current excessive time, MCU circuit 1 can switch off the pump immediately, effectively can protect water pump like this.
Bidirectional triode thyristor Q1 and zero cross fired optocoupler U2 and resistance R9, R10 form pump switch circuit 5, and resistance R9, R10 are used for current limliting, and zero cross fired optocoupler U2 is for driving bidirectional triode thyristor Q1.
Described water level detection circuit determines water level by the Detection capacitance duration of charging, when sensed water level, MCU circuit 1 sends high level, respectively by resistance R13, R14, R15 are to electric capacity C6, C7, C8 charges, and the AD mouth of MCU circuit 1 changes to a certain amount of time used determine water level conditions by measuring AD value.
Due to the utilization of technique scheme, the utility model compared with prior art has following advantages:
Capacitance type liquid level controller described in the utility model is convenient, flexible, cost is lower, and volume is little, movement-less part, reliability is high, not by the interference of motor-field, not easily snarled by foreign matter, block, the product of having shaped can be as required, level set or setting multi-level point can be changed easily, and liquid level climbing speed can be judged voluntarily, when liquid level rises too fast, water pump can be made to enter duty in advance.
Below be only embody rule example of the present utility model, protection domain of the present utility model is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, all drops within the utility model rights protection scope.
Claims (10)
1. a capacitance type liquid level controller, comprises MCU circuit, pump switch circuit, water level detection circuit; Described MCU circuit charges to water level detection circuit, and judge water level conditions by the change of voltage in measuring unit's time, when water level is lower than preset value, drive pump switch circuit that water pump is quit work, when water level is higher than preset value, pump switch circuit is driven to make water pump unlatching work; It is characterized in that: described water level detection circuit determines water level by the Detection capacitance duration of charging.
2. capacitance type liquid level controller according to claim 1, is characterized in that: also comprise power supply stabilization circuit; Described power supply stabilization circuit provides a stable power supply for MCU circuit.
3. capacitance type liquid level controller according to claim 2, is characterized in that: described power supply stabilization circuit is by resistance R1, R2, R3, R4 step-down, carries out half-wave rectification by diode D1 and D2 after step-down, then obtains a stable voltage through step-down chip.
4. the capacitance type liquid level controller according to claim 1 or 2 or 3, is characterized in that: also comprise water pump current detection circuit; Described water pump current detection circuit is for measuring the electric current of water pump, and when the current overload measured, described MCU control circui pump switch circuit makes water pump at once quit work.
5. capacitance type liquid level controller according to claim 4, is characterized in that: described water pump current detection circuit is by resistance R6, and R7, R8 detect water pump electric current, and wherein resistance R6, R7 are used for sampling, and resistance R8 is used for current limliting; When current is excessive, MCU circuit can switch off the pump immediately.
6. capacitance type liquid level controller according to claim 5, is characterized in that: also comprise zero cross detection circuit; Described zero cross detection circuit is used for detecting the zero crossing of alternating current sine wave, and drives controllable silicon with this.
7. capacitance type liquid level controller according to claim 6, is characterized in that: described zero cross detection circuit is triode Q2, and it is used for detecting zero point, and after zero point being detected, MCU circuit sends pulse and drives pump switch circuit.
8. capacitance type liquid level controller according to claim 7, is characterized in that: described water level detection circuit, comprises high water stage testing circuit, middle water level testing circuit, low-water level testing circuit; Described MCU circuit is respectively to high water stage testing circuit, middle water level testing circuit, the charging of low-water level testing circuit, and judge water level conditions respectively by the change of voltage in measuring unit's time, when water level is lower than each self-corresponding preset value, drive pump switch circuit that water pump is quit work, when water level is higher than during to self-corresponding preset value, pump switch circuit is driven to make water pump unlatching work.
9. capacitance type liquid level controller according to claim 8, is characterized in that: described pump switch circuit, comprises bidirectional triode thyristor Q1, zero cross fired optocoupler U2 and resistance R9, R10; Resistance R9, R10 are used for current limliting, and zero cross fired optocoupler U2 is for driving bidirectional triode thyristor Q1.
10. capacitance type liquid level controller according to claim 9, it is characterized in that: when described water level detection circuit sensed water level, MCU circuit sends high level, described water level detection circuit is respectively by resistance R13, R14, R15 are to electric capacity C6, C7, C8 charges, and the AD mouth of MCU circuit changes to a certain amount of time used determine water level conditions by measuring AD value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520511977.XU CN204925817U (en) | 2015-07-16 | 2015-07-16 | Capacitanc liquid level controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520511977.XU CN204925817U (en) | 2015-07-16 | 2015-07-16 | Capacitanc liquid level controller |
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| Publication Number | Publication Date |
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| CN204925817U true CN204925817U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520511977.XU Active CN204925817U (en) | 2015-07-16 | 2015-07-16 | Capacitanc liquid level controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774008A (en) * | 2017-01-20 | 2017-05-31 | 何文东 | A kind of level testing methods of electric kettle |
| CN108052130A (en) * | 2017-12-12 | 2018-05-18 | 长沙科悦企业管理咨询有限公司 | A kind of quantitative water compensating automatic controller |
-
2015
- 2015-07-16 CN CN201520511977.XU patent/CN204925817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774008A (en) * | 2017-01-20 | 2017-05-31 | 何文东 | A kind of level testing methods of electric kettle |
| CN108052130A (en) * | 2017-12-12 | 2018-05-18 | 长沙科悦企业管理咨询有限公司 | A kind of quantitative water compensating automatic controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Cheng Hu Lu, Wuzhong Economic Development Zone of Suzhou City, Jiangsu Province, No. 7 215168 Patentee after: GP ENTERPRISES CO., LTD. Address before: Cheng lake road Wuzhong Economic Development Zone of Suzhou City, Jiangsu Province, No. 7 215128 Patentee before: Suzhou GP Enterprises Co., Ltd. |
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| CP03 | Change of name, title or address |