CN102562553A - Electromagnetic water pump and output flow control method thereof - Google Patents
Electromagnetic water pump and output flow control method thereof Download PDFInfo
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- CN102562553A CN102562553A CN2012100511031A CN201210051103A CN102562553A CN 102562553 A CN102562553 A CN 102562553A CN 2012100511031 A CN2012100511031 A CN 2012100511031A CN 201210051103 A CN201210051103 A CN 201210051103A CN 102562553 A CN102562553 A CN 102562553A
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Abstract
The invention discloses an electromagnetic water pump capable of controlling the output flow and an output flow control method thereof. The electromagnetic water pump comprises a pump body, an electromagnetic coil module installed outside the pump body and an electromagnetic core plunger installed inside the pump body, wherein a pulse electromagnetic field generated by an electromagnetic coil pushes the electromagnetic core plunger to run in a reciprocating manner; the electromagnetic water pump is further provided with a control circuit; a current sampling element and a switch control element are arranged between the control circuit and the coil of the electromagnetic coil module; and the switch control element is controlled through sampling analysis on the current of the coil so as to be adjusted, and the frequency of current input to the coil is changed. The flow change is compensated through measuring the change of coil current. The scheme adopted by the invention has the following advantages: 1, the circuit is simpler and the reliability is higher due to no arrangement of a temperature sensor; 2, the electromagnetic water pump has less possibility of being influenced by external temperature and is slightly influenced by external interference; and 3, the current is correlated to the integral temperature of the coil, so that the temperature of the pump body can be better reflected, and the compensation effect is better.
Description
Technical field:
The present invention relates to the Electromagnetic water pump technical field, refer in particular to a kind of Electromagnetic water pump of may command output flow, and the method for this Electromagnetic water pump control output flow.
Background technique:
At present, small-sized plunger type Electromagnetic water pump has obtained using widely in every field, and particularly miniature plunger type water pump has obtained extensive use with the small and exquisite precision of its structure, and it can be applied in products such as coffee machine, steam generating device.The principle of plunger type Electromagnetic water pump is: plunger is not to utilize bent axle or applied external force, and plunger is a action of a magnetic field lower stress externally, carries out reciprocal operation.Wherein the external magnetic field is half-wave operation, and electromagnetic field only applies the power of compression direction (forward operation) to plunger, and the stressed spring that comes from water pump inside during plunger return (inverted running).Under the effect of electromagnetic force and spring force, plunger back and forth moves, and water is sucked by water intake, is pumped by water outlet.
Plunger whenever comes and goes operation once in the electromagnetic pump, and water outlet will pump the liquid of a specific discharge.It is a kind of working method of pulsed, if provide this break-make electrical pulse continuously, pump just can the continuous impulse formula pumps liquid.Want to increase the flow of (or reducing) pump, the number of times of break-make electrical pulse that only needs to increase (or minimizing) electromagnetic pump is just passable.So, under the constant situation of the power frequency in supplying with electromagnetic pump, remain unchanged on the flow theory of electromagnetic pump pump water at present.But in actual use,, occur easily changing because external cause will cause the flow of electromagnetic pump can't keep stable.Concrete reason is following, and along with the rising of electromagnetic pump body operating temperature, the gap between each moving element, frictional force etc. all can change, thereby the liquid measure that causes each pulse to pump can change, and just whole flow can change.Also, some application area of electromagnetic pump have been limited because of this reason.
Solution to the problems described above is at present: a temperature transducer is installed on the coil of electromagnetic pump; Through measuring variation of temperature; Come the number of pulses of electromagnetic pump is compensated, also just flow is compensated, this has just improved the discharge stability of electromagnetic pump.But can increase temperature transducer through measuring the coil method of temperature; Increased cost; Also will increase wiring in addition, rate of fault can increase, and the measurement of simultaneous temperature receives the influence of ambient temperature again easily; Nor can measure the actual temperature (the only temperature of energy measurement coil surface) of coil inside exactly, so this compensation effect is not too desirable.
Summary of the invention:
Technical problem to be solved by this invention is to overcome the existing in prior technology deficiency; A kind of Electromagnetic water pump of may command output flow is provided; Be applied to the demand of different use occasions; The present invention is through electric current is carried out sample analysis, according to its frequency of change in current adjustment, thereby realizes that the electromagnetic pump flow keeps constant.
In order to solve the problems of the technologies described above; The present invention has adopted following technical proposals: the Electromagnetic water pump of this may command output flow comprises: the pump housing, the magnetic core plunger that is installed in the outside electromagnetic coil module of the pump housing and is installed in pump housing inside; The pulsed electromagnetic field promotion magnetic core plunger that produces through electromagnetic coil back and forth moves; This Electromagnetic water pump also has a control circuit, is provided with a current sampling element and switch control unit between the coil in control circuit and electromagnetic coil module, through the sample analysis control switch control unit to electric current in the coil; Adjustment switch control unit, change inputs to the power frequency in the coil.
Furthermore, in the technique scheme, described current sampling element is the resistance that is connected with control circuit.
Furthermore, in the technique scheme, described switch control unit is a controllable silicon.
Furthermore, in the technique scheme, be provided with the Returnning spring that acts on the plunger in the described pump housing, back and forth move through the magnetic force of electromagnetic coil module generation and the elastic force driven magnetic stem stem plug of Returnning spring.
Another technical problem to be solved by this invention is to provide a kind of method of Electromagnetic water pump control output flow.
For solving the problems of the technologies described above; The technological scheme that the present invention adopted is: this method feeds back to control circuit for the current values of coil in the Electromagnetic water pump is taken a sample with the current values of obtaining, and sends corresponding instruction by control circuit according to numerical value; Control inputs to the current pulse frequency of coil in the Electromagnetic water pump; Be control circuit according to the change in current amount, according to required standard in advance corresponding compensation is carried out in current pulse, the flow of control Electromagnetic water pump keeps constant.
Furthermore, in the technique scheme, the mode of said current values sampling to coil is: in circuit, increase a current sampling resistor, this resistance will be through himself currrent feedback to control circuit.
Furthermore, in the technique scheme, described control circuit is connected with a controllable silicon, by control circuit according to current sampling numerical control silicon controlled turn-on frequency, thereby control inputs to the current pulse frequency of coil in the Electromagnetic water pump.
In sum; The present invention adopts above-mentioned two technological schemes; It has increased current sampling element and switch control unit between control circuit and electromagnetic pump coil; Through the work of control circuit control switch control unit (for example controllable silicon) control electromagnetic pump, when accelerating the conducting number of times of (or slowing down) controllable silicon in the unit time (changing the frequency of pulsed electric current), just can strengthen the flow of (or reducing) electromagnetic pump.Current sampling element among the present invention detects the operating current of electromagnetic pump; Deliver to and carry out calculation process in the control circuit; Control circuit can be according to the change in current amount; Backoff algorithm according to setting calculates the corresponding compensation amount automatically, revises (increase or reduce) silicon controlled conducting number of times with this, thereby realizes the effect of electromagnetic pump constant flow.
The present invention is directed to the influence that the electromagnetic pump flow changes with pump body temperature, adopt variation, the variation that comes compensating flowrate through measure coil currents.Its working principle is: variation of temperature directly can influence change in current, and this temperature is the bulk temperature of coil, more directly more accurately more is difficult for having external temperature to disturb.On the other hand, the size of electric current also has the coherence of part with the size of flow, come compensating flowrate variation meeting more favourable with current change quantity.This programme has following advantage:
1, no temperature transducer, the more simple and reliable property of circuit is higher;
2, be not subject to externally temperature influence, it is little influenced by external interference.
3, electric current is relevant with the coil bulk temperature, more can reflect the temperature of the pump housing, and compensation effect is better.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment:
Below in conjunction with specific embodiment and accompanying drawing the present invention is further specified.
The method that the present invention adopted is: the current values to coil in the Electromagnetic water pump is taken a sample; The current values of obtaining is fed back to control circuit; Send corresponding instruction by control circuit according to numerical value, control inputs to the current pulse frequency of coil in the Electromagnetic water pump, and promptly control circuit is according to the change in current amount; Required standard according to is in advance carried out corresponding compensation to current pulse, and the flow of control Electromagnetic water pump keeps constant.
Particularly, this method need be set up corresponding data sheet, promptly tests when coil current changes in the Electromagnetic water pump influence to pump capacity.Promptly need test and guarantee under the constant situation of pump capacity; When electric current changes in the coil; The variation that the pulse frequency of electric current takes place; And with different current values with set up mathematics change curve or set up corresponding data sheet to the current corresponding pulse frequency, and this mathematics change curve or data sheet are inputed to control circuit, so that control circuit can be according to the pulse frequency of this curve or form control electric current.
Below in conjunction with practical implementation the present invention is further specified, see shown in Figure 1ly, what present embodiment adopted is a kind of half-wave Electromagnetic water pump, and it comprises: the pump housing 1, electromagnetic coil module 2, plunger 3 and Returnning spring 4.Wherein, Electromagnetic coil module 2 is installed in the pump housing 1 outside; The plunger 3 that adopts magnetic core to make is installed in the pump housing 1 internal cavity; Returnning spring 4 is arranged in the pump housing 1, and Returnning spring 4 acts on the plunger 3, and it is in the opposite direction that Returnning spring 4 acts on the electromagnetic force that elastic force direction and electromagnetic coil module 2 on the plunger 3 act on the plunger 3.
See shown in Figure 2ly, this is the circuit theory diagrams of present embodiment, in the entire circuit cut-in operation power supply, is provided with a current sampling element 6 and switch control unit 7 between the coil in control circuit 5 and the electromagnetic coil module 2.Current sampling element 6 is for being connected in the resistance in the working circuit in the present embodiment, and switch control unit 7 adopts controllable silicon.Certainly, also can adopt other electronic components to replace as required.
The turn-on frequency of control circuit 5 control switch control units 7, under specified operating current I, the frequency of its conducting is A.When along with operating time of electromagnetic pump increases, after the heat that produces in the coil makes its temperature raise, variations of will being burdened with of the resistance R of coil will cause operating current to change into I1 by I like this, thus the pump water yield of initiation electromagnetic pump.The present invention is through the sampling to electric current in the circuit; Understand the operating current of coil in real time, detecting operating current is I1, and control circuit 5 will change the turn-on frequency of switch control unit 7 according to present current values this moment; Frequency is adjusted to A1 by A; Thereby form the working state of electromagnetic pump is revised, returned to original pump water flow, thereby realize the effect of electromagnetic pump constant flow.
From the above mentioned, the present invention is with respect to the present mode that is adopted, and it has the following advantages:
1, the present invention need not mounting temperature sensor in circuit, only needs to increase a current sampling element and gets final product, and circuit is simpler, and reliability is higher;
2, the present invention promptly is not a pulse frequency of controlling electric current with Temperature numerical owing to do not adopt TEMP, so it is not subject to externally temperature influence, it is little influenced by external interference.
3, the electric current of the direct test coil of the present invention, this is because electric current is relevant with the coil bulk temperature, more can reflect the temperature of the pump housing according to change in current, the compensation effect that control circuit is made is better.
Certainly; The above is merely specific embodiment of the present invention; Be not to limit practical range of the present invention, all equivalences of doing according to the said structure of claim of the present invention, characteristic and principle change or modify, and all should be included in the claim of the present invention.
Claims (7)
1. Electromagnetic water pump; Comprise: the pump housing, the magnetic core plunger that is installed in the outside electromagnetic coil module of the pump housing and is installed in pump housing inside; The pulsed electromagnetic field promotion magnetic core plunger that produces through electromagnetic coil back and forth moves; It is characterized in that: this Electromagnetic water pump also has a control circuit, is provided with a current sampling element and switch control unit between the coil in control circuit and electromagnetic coil module, through the sample analysis control switch control unit to electric current in the coil; Adjustment switch control unit changes the frequency that inputs to the impulsive current in the coil.
2. a kind of Electromagnetic water pump according to claim 1 is characterized in that: the resistance of described current sampling element for being connected with control circuit.
3. a kind of Electromagnetic water pump according to claim 1 is characterized in that: described switch control unit is a controllable silicon.
4. a kind of Electromagnetic water pump according to claim 1 is characterized in that: be provided with the Returnning spring that acts on the plunger in the described pump housing, back and forth move through the magnetic force of electromagnetic coil module generation and the elastic force driven magnetic stem stem plug of Returnning spring.
5. the method for Electromagnetic water pump control output flow; It is characterized in that: this method feeds back to control circuit for the current values of coil in the Electromagnetic water pump is taken a sample with the current values of obtaining, and sends corresponding instruction by control circuit according to numerical value; Control inputs to the current pulse frequency of coil in the Electromagnetic water pump; Be control circuit according to the change in current amount, according to required standard in advance corresponding compensation is carried out in current pulse, the flow of control Electromagnetic water pump keeps constant.
6. the method for a kind of Electromagnetic water pump control output flow according to claim 5; It is characterized in that: the mode of said current values sampling to coil is: in circuit, increase a current sampling resistor, this resistance will be through himself currrent feedback to control circuit.
7. the method for a kind of Electromagnetic water pump control output flow according to claim 5; It is characterized in that: described control circuit is connected with a controllable silicon; By control circuit according to current sampling numerical control silicon controlled turn-on frequency, thereby control inputs to the current pulse frequency of coil in the Electromagnetic water pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100511031A CN102562553A (en) | 2012-03-01 | 2012-03-01 | Electromagnetic water pump and output flow control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100511031A CN102562553A (en) | 2012-03-01 | 2012-03-01 | Electromagnetic water pump and output flow control method thereof |
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| CN102562553A true CN102562553A (en) | 2012-07-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618205A (en) * | 2017-01-10 | 2017-05-10 | 苏州咖博士咖啡系统科技有限公司 | Algorithm for accuracy control of cup volume of coffee maker |
| CN109310230A (en) * | 2016-06-30 | 2019-02-05 | 雀巢产品技术援助有限公司 | Beverage preparing machine with controlled pump |
| CN109611310A (en) * | 2018-12-29 | 2019-04-12 | 中国原子能科学研究院 | A kind of electromagnetic field circular arc conduit electromagnetic pump and electromagnetism pumping system |
| CN110425324A (en) * | 2019-08-26 | 2019-11-08 | 高满囡 | With the solenoid valve for being filtered function to water body impurity |
| CN114109806A (en) * | 2021-11-26 | 2022-03-01 | 深圳华星恒泰泵阀有限公司 | Electromagnetic pump with adjustable flow |
| CN114251852A (en) * | 2021-08-24 | 2022-03-29 | 佛山市顺德区美的饮水机制造有限公司 | Instantaneous heating device, control method and control device thereof, water treatment device and medium |
| WO2023078326A1 (en) * | 2021-11-05 | 2023-05-11 | 骏马精密工业(惠州)有限公司 | Electromagnetic pump having flow monitoring function |
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| CN2137728Y (en) * | 1992-04-23 | 1993-07-07 | 机械电子工业部合肥通用机械研究所 | Electromagnetic metering pump |
| CN2549220Y (en) * | 2002-04-04 | 2003-05-07 | 广东省机械研究所 | Adjustable miniature electromagnetic pump |
| CN1846062A (en) * | 2003-08-01 | 2006-10-11 | 信浓绢糸株式会社 | Electromagnetic pump |
| CN201535237U (en) * | 2009-07-16 | 2010-07-28 | 广东新宝电器股份有限公司 | Electromagnetic pump with adjustable flow quantity |
| CN202531407U (en) * | 2012-03-01 | 2012-11-14 | 深圳华星恒泰泵阀有限公司 | Electromagnetic water pump capable of controlling output flow |
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2012
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Patent Citations (5)
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| CN2137728Y (en) * | 1992-04-23 | 1993-07-07 | 机械电子工业部合肥通用机械研究所 | Electromagnetic metering pump |
| CN2549220Y (en) * | 2002-04-04 | 2003-05-07 | 广东省机械研究所 | Adjustable miniature electromagnetic pump |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109310230A (en) * | 2016-06-30 | 2019-02-05 | 雀巢产品技术援助有限公司 | Beverage preparing machine with controlled pump |
| US11178999B2 (en) | 2016-06-30 | 2021-11-23 | Societe Des Produits Nestle S.A. | Beverage preparation machine with a controlled pump |
| CN106618205A (en) * | 2017-01-10 | 2017-05-10 | 苏州咖博士咖啡系统科技有限公司 | Algorithm for accuracy control of cup volume of coffee maker |
| CN109611310A (en) * | 2018-12-29 | 2019-04-12 | 中国原子能科学研究院 | A kind of electromagnetic field circular arc conduit electromagnetic pump and electromagnetism pumping system |
| CN109611310B (en) * | 2018-12-29 | 2023-09-29 | 中国原子能科学研究院 | Electromagnetic field circular arc conduit electromagnetic pump and electromagnetic pump system |
| CN110425324A (en) * | 2019-08-26 | 2019-11-08 | 高满囡 | With the solenoid valve for being filtered function to water body impurity |
| CN114251852A (en) * | 2021-08-24 | 2022-03-29 | 佛山市顺德区美的饮水机制造有限公司 | Instantaneous heating device, control method and control device thereof, water treatment device and medium |
| WO2023078326A1 (en) * | 2021-11-05 | 2023-05-11 | 骏马精密工业(惠州)有限公司 | Electromagnetic pump having flow monitoring function |
| CN114109806A (en) * | 2021-11-26 | 2022-03-01 | 深圳华星恒泰泵阀有限公司 | Electromagnetic pump with adjustable flow |
| CN114109806B (en) * | 2021-11-26 | 2022-12-13 | 深圳华星恒泰泵阀有限公司 | Electromagnetic pump with adjustable flow |
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Address after: Shenzhen City, Guangdong province Baoan District 518100 District 67 Liuxian road Jiaan Science Park No. 1 building 4 floor area 3 Applicant after: Shenzhen Huaxinghengtai Valve Co., Ltd. Applicant after: Shenzhen Longood Intelligent Electric Co., Ltd. Address before: Shenzhen City, Guangdong province Baoan District 518100 District 67 Liuxian road Jiaan Science Park No. 1 building 4 floor area 3 Applicant before: Shenzhen Huaxinghengtai Valve Co., Ltd. Applicant before: Shenzhen Langke Electrical Appliance Co., Ltd. |
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Application publication date: 20120711 |