CN103089660A - Water pump with water shortage protection device - Google Patents
Water pump with water shortage protection device Download PDFInfo
- Publication number
- CN103089660A CN103089660A CN2011103393437A CN201110339343A CN103089660A CN 103089660 A CN103089660 A CN 103089660A CN 2011103393437 A CN2011103393437 A CN 2011103393437A CN 201110339343 A CN201110339343 A CN 201110339343A CN 103089660 A CN103089660 A CN 103089660A
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- microprocessor
- water
- water pump
- protection device
- shortage protection
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 15
- 208000005156 Dehydration Diseases 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000001012 protector Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a water pump with a water shortage protection device. The water pump comprises a motor, a pump body and the water shortage protection device, the motor is a direct-current brushless motor which comprises a stator component, a permanent-magnetic rotor component and a controller, the controller comprises a direct-current power source, an inverting unit, a microprocessor, a pulse width modulating driving circuit and a rotor position detecting unit, the water shortage protection device comprises a rotor position detecting unit, a microprocessor and an executing module mounted inside the microprocessor, the rotor position detecting unit collects an actual rotating speed (V1) of the rotor component and transmits the same to the microprocessor, and the executing module inside the microprocessor judges whether the actual rotating speed (V1) is larger than a set rotating speed value (VB) or not, if the actual rotating speed (V1) is larger than the set rotating speed value (VB), the executing module inside the microprocessor outputs a signal to control the inverting unit to cut off power supply of a winding on the stator component so as to enable the water pump to stop running. The water pump with the water shortage protecting device is simple and easy in mounting, small in size, electricity-saving and cost-saving.
Description
Technical field
The present invention relates to a kind of water pump with water-shortage protection device.
Background technique
At present, on market, the water pump of aquatic group dallies very large to the wearing and tearing of the pump housing in dried up situation, for this situation, traditional water pump adopts no-load protector for electrical, the employing float switch that this no-load protector for electrical has, utilize water level on fall to driving ball float on fall, make switch on and off, this structure is comparatively complicated, and volume is large, normally is used in the water pump that AC motor drives; Some no-load protector for electricals adopt the electronic switch mode; produce water level signal by level sensor; signal is delivered to controller; controller control relay deenergization is again realized, the water pump employing AC motor driving of most aquatic groups, no-load protector for electrical and AC motor independent separate; therefore trouble is installed; complex structure, comparatively power consumption, user cost is high.
Summary of the invention
The invention provides a kind of water pump with water-shortage protection device; it utilizes dc brushless motor as power source; utilize original hardware in electric machine controller to mate and form built-in water-shortage protection device; need not independent external water-shortage protection device; install simple and easy; volume is little, and cost is saved in comparatively economize on electricity.
Technological scheme of the present invention is achieved in that
a kind of water pump with water-shortage protection device, comprise motor, the pump housing and water-shortage protection device, the cavity of pump housing the inside is installed impeller, set into the mouth of a river and water outlet on the pump housing, rotating shaft on motor extend into the cavity the inside and impeller couples together, described motor adopts dc brushless motor, dc brushless motor comprises stator module, p-m rotor assembly and controller, controller comprises DC electrical source, inversion unit, microprocessor, pulsewidth modulation drive circuit and rotor position detection unit, described water-shortage protection device comprises rotor position detection unit, microprocessor and the Executive Module that is arranged on the microprocessor the inside, rotor position detection unit is picked up the actual speed V1 of rotor assembly and is transported to microprocessor, whether the Executive Module of microprocessor the inside differentiates actual speed V1 greater than setting tachometer value VB, if actual speed V1 is greater than setting tachometer value VB, show that water pump is in exsiccosis, the Executive Module output signal of microprocessor the inside is controlled the power supply that inversion unit cuts off the winding on stator module, water pump is shut down.
Executive Module one, the interval time period T of above-mentioned microprocessor the inside carries out an actual speed V1 and sets the comparison of tachometer value VB, if the actual speed V1 of several times is greater than setting tachometer value VB, water pump is shut down, and a time period T is no more than 1 hour.
Above-mentioned microprocessor is single-chip microcomputer or DSP digital signal processor, and rotor position detection unit comprises and Hall element Hall and A/D conversion.
technological scheme of the present invention compared with prior art has following advantage: utilize dc brushless motor as power source, utilize original hardware in electric machine controller to mate and form built-in water-shortage protection device, water-shortage protection device comprises rotor position detection unit, microprocessor and the Executive Module that is arranged on the microprocessor the inside, rotor position detection unit is picked up the actual speed V1 of rotor assembly and is transported to microprocessor, whether the Executive Module of microprocessor the inside differentiates actual speed V1 greater than setting tachometer value VB, if actual speed V1 is greater than setting tachometer value VB, show that water pump is in exsiccosis, the Executive Module output signal of microprocessor the inside is controlled the power supply that inversion unit cuts off the winding on stator module, water pump is shut down.It need not independent external water-shortage protection device, installs simple and easyly, and volume is little, comparatively economize on electricity, saving cost; Executive Module one, the interval time period T of microprocessor the inside carries out an actual speed V1 and sets the comparison of tachometer value VB, if the actual speed V1 of several times is greater than setting tachometer value VB, water pump is shut down, water pump is shut down, make water pump detect operation more accurate.
Description of drawings
Fig. 1 is the structural representation of water pump of the present invention;
Fig. 2 is the principle schematic of the three phase electric machine controller of water pump of the present invention;
Fig. 3 is the principle schematic of a phase electric machine controller of water pump of the present invention;
Fig. 4 is that pump motor of the present invention is at dried up rear rotation speed change schematic diagram;
Fig. 5 is water pump control flow chart of the present invention;
Fig. 6 is the water pump control flow chart to the improvement of Fig. 5.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
as Fig. 1, Fig. 2, shown in Figure 3, water pump of the present invention comprises motor 2, the pump housing 1 and water-shortage protection device, the cavity of the pump housing 1 the inside is installed the impeller (not shown), set into the mouth of a river 11 and water outlet 12 on the pump housing 1, rotating shaft on motor 2 extend into the cavity the inside and impeller couples together, described motor 2 adopts dc brushless motor, dc brushless motor comprises stator module, p-m rotor assembly and controller 21, controller 21 comprises DC electrical source, inversion unit, microprocessor, pulsewidth modulation drive circuit and rotor position detection unit, rotor position detection unit comprises and Hall element Hall and A/D conversion, microprocessor is single-chip microcomputer or DSP digital signal processor, current detecting unit detects the electric current of winding, it comprises resistance R and A/D conversion with windings in series.
as shown in Figure 4, under the dried up state of water pump, the rise of rotational speed of its rotor assembly, the rotating speed of actual rotor assembly is increased to a definite value, described water-shortage protection device comprises rotor position detection unit, microprocessor and the Executive Module that is arranged on the microprocessor the inside, rotor position detection unit is picked up the actual speed V1 of rotor assembly and is transported to microprocessor, whether the Executive Module of microprocessor the inside differentiates actual speed V1 greater than setting tachometer value VB, if actual speed V1 is greater than setting tachometer value VB, show that water pump is in exsiccosis, the Executive Module output signal of microprocessor the inside is controlled the power supply that inversion unit cuts off the winding on stator module, water pump is shut down, when in the water pump leaving water, the actual speed V1 of motor begins to rise, until reach some values, therefore tachometer value VB can be set, as actual speed V1 when setting tachometer value VB, be considered as the dried up state of water pump, the Executive Module output signal of microprocessor the inside is controlled the power supply that inversion unit cuts off the winding on stator module, water pump is shut down.
As shown in Figure 5, the water pump operation workflow is as follows: electrification reset, the DC brushless motor controller initialization system, can detect times N=0 by initializing set, and driving pump operation, when rotor position detection unit is picked up the actual speed V1 of rotor assembly and is transported to microprocessor, whether the Executive Module of microprocessor the inside differentiates actual speed V1 greater than setting tachometer value VB, if actual speed V1 is greater than setting tachometer value VB, the Executive Module output signal of microprocessor the inside is controlled the power supply that inversion unit cuts off the winding on stator module, and water pump is shut down.
As shown in Figure 6, during water pump operation, the Executive Module of microprocessor the inside carries out actual speed V1 and the comparison of setting tachometer value VB every a time period T, number of times comes record with N, every inspection contrast once, the N value adds 1, if the actual speed V1 of several times is greater than setting tachometer value VB, water pump is shut down, for example times N 0=5 time can be set, the time that judges is equivalent to 5T, in the time period of 5T scope, carry out the actual speed V1 and the comparison of setting tachometer value VB of several times, can make like this judgement more accurate.A described time period T is no more than 1 hour.
Claims (4)
1. water pump with water-shortage protection device, comprise motor, the pump housing and water-shortage protection device, the cavity of pump housing the inside is installed impeller, set into the mouth of a river and water outlet on the pump housing, rotating shaft on motor extend into the cavity the inside and impeller couples together, described motor adopts dc brushless motor, dc brushless motor comprises stator module, p-m rotor assembly and controller, controller comprises DC electrical source, inversion unit, microprocessor, pulsewidth modulation drive circuit and rotor position detection unit, it is characterized in that: described water-shortage protection device comprises rotor position detection unit, microprocessor and the Executive Module that is arranged on the microprocessor the inside, rotor position detection unit is picked up the actual speed (V1) of rotor assembly and is transported to microprocessor, whether the Executive Module of microprocessor the inside differentiates actual speed (V1) greater than setting tachometer value (VB), if actual speed (V1) is greater than setting tachometer value (VB), show that water pump is in exsiccosis, the Executive Module output signal of microprocessor the inside is controlled the power supply that inversion unit cuts off the winding on stator module, water pump is shut down.
2. a kind of water pump with water-shortage protection device according to claim 1; it is characterized in that: the Executive Module time period of interval (T) inside microprocessor is carried out actual speed (V1) and the comparison of setting tachometer value (VB) once; if the actual speed of several times (V1) all greater than setting tachometer value (VB), shuts down water pump.
3. a kind of water pump with water-shortage protection device according to claim 2, it is characterized in that: a time period (T) is no more than 1 hour.
4. according to claim 2 or 3 described a kind of water pumps with water-shortage protection device, it is characterized in that: microprocessor is single-chip microcomputer or DSP digital signal processor, rotor position detection unit comprises and Hall element (Hall) and A/D conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110339343.7A CN103089660B (en) | 2011-10-31 | 2011-10-31 | A kind of water pump with water-shortage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110339343.7A CN103089660B (en) | 2011-10-31 | 2011-10-31 | A kind of water pump with water-shortage protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103089660A true CN103089660A (en) | 2013-05-08 |
| CN103089660B CN103089660B (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110339343.7A Expired - Fee Related CN103089660B (en) | 2011-10-31 | 2011-10-31 | A kind of water pump with water-shortage protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN103089660B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235029A (en) * | 2014-09-05 | 2014-12-24 | 东莞市众隆泵业科技有限公司 | Miniature brushless direct-current centrifugal water pump |
| CN113273906A (en) * | 2020-02-20 | 2021-08-20 | 九阳股份有限公司 | Food processing machine |
| CN113565769A (en) * | 2021-07-08 | 2021-10-29 | 苏州盖茨电子科技有限公司 | Anti-dry rotation control system and control method for automobile water pump |
| CN114738294A (en) * | 2022-04-13 | 2022-07-12 | 珠海格力电器股份有限公司 | Water pump water shortage detection method and device, computer equipment and medium |
| CN114776568A (en) * | 2022-04-14 | 2022-07-22 | 深圳市杉川机器人有限公司 | Water shortage protection device and method for water pump |
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| CN201877807U (en) * | 2010-11-26 | 2011-06-22 | 莱克电气股份有限公司 | Water shortage protection circuit of discharge pump with brushless motor |
| CN201934302U (en) * | 2010-12-31 | 2011-08-17 | 陈俊平 | Self-protective water pump |
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2011
- 2011-10-31 CN CN201110339343.7A patent/CN103089660B/en not_active Expired - Fee Related
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| JP2001082378A (en) * | 1999-09-09 | 2001-03-27 | Hitachi Ltd | Method for controlling submerged motor-driven pump for drainage |
| CN2496184Y (en) * | 2001-04-10 | 2002-06-19 | 达科动力有限公司 | Intelligent driving module for electric motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235029A (en) * | 2014-09-05 | 2014-12-24 | 东莞市众隆泵业科技有限公司 | Miniature brushless direct-current centrifugal water pump |
| CN113273906A (en) * | 2020-02-20 | 2021-08-20 | 九阳股份有限公司 | Food processing machine |
| CN113565769A (en) * | 2021-07-08 | 2021-10-29 | 苏州盖茨电子科技有限公司 | Anti-dry rotation control system and control method for automobile water pump |
| CN114738294A (en) * | 2022-04-13 | 2022-07-12 | 珠海格力电器股份有限公司 | Water pump water shortage detection method and device, computer equipment and medium |
| CN114776568A (en) * | 2022-04-14 | 2022-07-22 | 深圳市杉川机器人有限公司 | Water shortage protection device and method for water pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103089660B (en) | 2015-12-16 |
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| PB01 | Publication | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20170601 Address after: 528400, Guangdong province Zhongshan Dongsheng town with Mao Village, Patentee after: Zhongshan Jiebao Electronic Appliance Co. Ltd Address before: 528414 Guangdong Province, Zhongshan City Dongsheng Town, Zhongshan City Industrial Zone with Mao Triopo Electric Co. Ltd. Patentee before: Zhu Xiaoxiong |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20181031 |
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| CF01 | Termination of patent right due to non-payment of annual fee |