CN102661762B - Flow sensor - Google Patents
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- CN102661762B CN102661762B CN201210152203.3A CN201210152203A CN102661762B CN 102661762 B CN102661762 B CN 102661762B CN 201210152203 A CN201210152203 A CN 201210152203A CN 102661762 B CN102661762 B CN 102661762B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000007789 sealing Methods 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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Abstract
The invention discloses a flow sensor. The flow sensor comprises a water inlet, a water outlet, a first water inlet channel, a second water inlet channel, an impeller cavity, a first magnet, a micro-pressure opening valve and a first Hall element, wherein inlets of the first water inlet channel and the second water inlet channel are communicated with the water inlet; outlets of the first water inlet channel and the second water inlet channel are respectively communicated with the impeller cavity; the outlet of the impeller cavity is communicated with the water outlet; an impeller is arranged in the impeller cavity; the first magnet is arranged on the impeller; the first Hall element is arranged in the position corresponding to the first magnet on the outer side of the impeller cavity; and the micro-pressure opening valve is arranged in the first water inlet channel. The flow sensor disclosed by the invention is provided with the two water inlet channels which are respectively used for detecting large water flow rate and small water flow rate, and the micro-pressure opening valve is arranged in the first water inlet channel, so that the flow sensor disclosed by the invention can detect the large flow rate which is more than 4L/min and the small flow rate which is less than 200mL/min, and further reduce the startup flow rate to 30mL/min.
Description
Technical field
The present invention relates to flow sensor.
Background technology
Flow sensor is a kind of device that can detect fluid flow high low signal in pipeline, in the control system of fluid machinery, often uses.After flow sensor is combined with suitable mechanical hook-up and/or electric device, can be used to accumulative total fluid total volume, also can be used for detecting instantaneous delivery.In the control system of water disposal facility, for the device of accumulative total water inventory, be called water meter, device for detection of instantaneous delivery is called flowmeter, and water meter and flowmeter can adopt the mode Design and manufacture that flow sensor is combined with suitable mechanical hook-up and/or electric device.
What the detection method of instantaneous delivery or the principle of flow sensor were commonly used at present has three kinds:
1. when flowing, fluid keeps on the impeller that can rotate and when fluid flows at correspondence position, Hall element and magnet being set respectively on motionless housing, when fluid flows, impeller will rotate, thereby make Hall element and magnet constantly mutually near exporting electric make-and-break signal with leaving, electric control system is processed this make-and-break signal, break-make number of times is counted, in the unit interval, more various flow is just larger for the number of times of break-make, otherwise flow is just less.Break-make number of times in unit interval is multiplied by a coefficient and can obtains the concrete numerical value of instantaneous delivery.With the flow sensor of this principle design, the minimum flow that can detect is at present 100mL/min～120mL/min.
2. by rotary-piston positive displacement principle, the disclosed method of patent documentation that for example patent No. is CN01105259.7, although less flow can be detected, according to the data of this series products (being called drip water meter) on the market, introduce its minimum flow that can detect (also claiming initial-flow) for 2L/h, i.e. 33.3mL/min.But, because the gap between its inner part mutually sliding must be very little, just can there is above-mentioned outstanding performance, so this class water meter can only be used in the water circuit system that detects this high-quality water quality of pure water, can not be used in and detect in the system of tap water water route.
3. can be when water (flow) direction moves forward a segment distance and fluid and does not flow when fluid flows can reposition the upper and fluid of moving core (or float) keep when mobile at correspondence position, magnet and Hall element or tongue tube being set respectively on motionless housing, like this, at water flow with while not flowing, export respectively break-make or open close electric signal, the disclosed technical scheme of patent documentation that for example patent No. is 200710029502.7.With the flow sensor of current on-off principle design, the about 200mL/min of minimum flow can be detected at present, when reaching 200mL/min, flow thinks that water is in flow state when above, when being less than 200mL/min, flow thinks that water is in flow state not, its flow detecting is not little, and can't detect concrete flow value.
Appliance water, the water purifier of for example family expenses or similar applications, its seepy question is considered to the weakness of industry, and therefore, the then automatic closing water source of can finding to leak is considered to one of technological development direction of the industry with the intelligent appliance water that sends warning.Leakage situation comprises that large flow leaks, and normal discharge leaks and tiny leakage.Known technology can solve the flow detection problem of large flow and normal discharge.The flow that exceedes the normal operation of appliance water is called large flow, and large flow leaks and can either detect also easily judgement; The flow value that normal discharge leaks also easily detects, more just can make and leak judgement in conjunction with out of Memory key element; And tiny leakage refers to the leakage of the flow that is less than the normal operation of appliance water.For example, when leakage flow is 60mL/min, be exactly tiny leakage.If the flow with 60mL/min leaks, after 24h, will leak 86.4L water, also can cause larger economic loss to user, and can be used at present the flow sensor of the known technology in tap water water route, all can not detect the leakage flow that is less than 100mL/min.
In sum, for solving the deficiencies in the prior art, need to design one and can detect mass-flow flow, can detect again the flow sensor of weep flow.
Summary of the invention
Technical matters to be solved by this invention is to provide one can detect mass-flow flow, can detect again the flow sensor of weep flow.
In order to solve the problems of the technologies described above, technical scheme provided by the present invention is: flow sensor, comprises water inlet, water delivering orifice, the first intake tunnel, the second intake tunnel, impeller cavity, impeller, the first magnet, minute-pressure open valve and the first Hall element; The entrance of described the first intake tunnel and the second intake tunnel is all communicated with water inlet; The outlet of the first intake tunnel and the second intake tunnel is communicated with respectively impeller cavity; The outlet of described impeller cavity is communicated with water delivering orifice; Described impeller is arranged in impeller cavity; Described the first magnet is arranged on impeller; First Hall element is set on the position of corresponding the first magnet outside described impeller cavity; Described minute-pressure open valve is arranged in the first intake tunnel.
Preferred technical scheme: flow sensor, also comprises moving core, the second magnet and the second Hall element or tongue tube; Described moving core is arranged in the second intake tunnel, and the second magnet is arranged on moving core, on the position of corresponding the second magnet, second Hall element or tongue tube is set outside the second intake tunnel.
Further technical scheme: the porch of described the second intake tunnel is provided with the second inlet opening that diameter is not more than 1.2mm; The bottom of described moving core has the surface of concave shape, and the bottom to moving core is rectified in the water outlet of the second inlet opening.
Further technical scheme: also comprise the second spring being arranged in the second intake tunnel; One end of described the second spring is against on moving core, and the other end is against on the inwall of the second intake tunnel.
Preferred technical scheme: described the first magnet is provided with two; Described two blocks of first magnet are separately positioned on the symmetric position of the both sides, center of impeller, and the N utmost point of two the first magnet and S are extremely mutually oppositely.
Preferred technical scheme: the smallest cross-sectional diameter of described the first intake tunnel is not less than 3mm, or minimum sectional area is not less than 7mm
2.
Preferred technical scheme: the smallest cross-sectional diameter of described the second intake tunnel is not more than 1.2mm, or minimum sectional area is not more than 1.13mm
2.
Preferred technical scheme: during described flow sensor operation, the gap that can produce between the part relatively moving is at least 0.1mm, and the porch of the first intake tunnel and the second intake tunnel is equipped with filtering element.
Preferred technical scheme: the rotating shaft of described impeller is horizontally disposed with.
Preferred technical scheme: described minute-pressure open valve comprises the flap, O-ring seal and the first spring that are arranged in the first intake tunnel, and valve import; Described O-ring seal is arranged on flap; One end of described the first spring is against on flap, and the other end is against on the inwall of the first intake tunnel; Described valve import place part connects with the inner wall sealing of the first intake tunnel; Between the inwall of the outside of described flap and the first intake tunnel, be provided with guide frame.
Adopted after technique scheme, the present invention has following beneficial effect:
(1) the present invention is by arranging two intake tunnels that are respectively used to detect mass-flow flow and weep flow, and minute-pressure open valve is set in the first intake tunnel, when flow is very little, minute-pressure open valve is in closed condition, all current can only pass through from the second intake tunnel, thereby improve the flow velocity of the second intake tunnel, and then less flow can be detected, thereby the present invention can either be detected be greater than the large flow of 4L/min, also can detect the low discharge that is less than 200mL/min, and initial-flow can be reduced to 30mL/min.
(2) when the present invention moves, the gap that can produce between the part relatively moving is at least 0.1mm, and the first water inlet porch logical and the second intake tunnel be equipped with can block water in the filtering element of particle, thereby the present invention can be used in tap water water route.
(3) the smallest cross-sectional diameter of the first intake tunnel of the present invention is not less than 3mm, or minimum sectional area is not less than 7mm
2, this structure is convenient to reduce resistance to water-flow, makes the discharge passed through from the first intake tunnel larger, and then detects larger flow.
(4) the smallest cross-sectional diameter of the second intake tunnel of the present invention is not more than 1.2mm, or minimum sectional area is not more than 1.13mm
2, this structure is convenient to improve water velocity, and while making flow very little, the current that flow into impeller cavity from the second intake tunnel also can impeller rotate.
(5) bottom of moving core of the present invention has the surface of concave shape, and the bottom to moving core is rectified in the water outlet of the second inlet opening, and this structure can make full use of into the moving core of water kinetic energy promotion and move, thereby detects small flow.
(6) rotating shaft of impeller of the present invention is horizontally disposed with, friction force when this structure can reduce wheel rotation to greatest extent, thereby less flow can impeller be rotated, needed minimum flow when reducing to greatest extent impeller and starting to rotate.
Accompanying drawing explanation
For content of the present invention is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein below
Fig. 1 is the structural representation of embodiments of the invention 1.
Fig. 2 is the structural representation of embodiments of the invention 2.
Label in accompanying drawing is:
Embodiment
(embodiment 1)
See Fig. 1, the flow sensor of the present embodiment, comprises water inlet 1, water delivering orifice 2, the first intake tunnel 3, the second intake tunnel 4, impeller cavity 5, impeller 6, the first magnet 7, minute-pressure open valve 8, the first Hall element, moving core 9, the second magnet 10, the second Hall element or tongue tube 11 and filtering element 13.
The entrance of the first intake tunnel 3 and the second intake tunnel 4 is all communicated with water inlet 1.The outlet of the first intake tunnel 3 and the second intake tunnel 4 is communicated with respectively impeller cavity 5.The outlet of impeller cavity 5 is communicated with water delivering orifice 2.Impeller 6 is arranged in impeller cavity 5, and the rotating shaft 6-1 of impeller 6 is horizontally disposed with.The first magnet 7 is provided with two, two blocks of first magnet 7 are separately positioned on the symmetric position of the both sides, center of impeller 6, and the N utmost point of two the first magnet 7 and S are extremely mutually oppositely, when impeller 6 forwards appropriate location to, wherein first magnet 7 makes it in a kind of electric state near the first Hall element; And turning over 180 while spending when impeller, another piece first magnet 7 makes it in another kind of electric state near the first Hall element.On the position of corresponding the first magnet 7 in impeller cavity 5 outsides, first Hall element is set.Minute-pressure open valve 8 is arranged in the first intake tunnel 3.
When the flow sensor of the present embodiment moves, the gap that can produce between the part relatively moving is at least 0.1mm, and the porch of the first water inlet logical 3 and the second intake tunnel 4 is equipped with filtering element 13, thereby the flow sensor of the present embodiment can be used in tap water water route.
The smallest cross-sectional diameter of the first intake tunnel 3 is not less than 3mm, or minimum sectional area is not less than 7mm
2.The preferred smallest cross-sectional diameter of the present embodiment is not less than 4mm, or minimum sectional area is not less than 12mm
2.This structure is convenient to reduce resistance to water-flow, makes the discharge passed through from the first intake tunnel larger, and then detects larger flow.
The smallest cross-sectional diameter of the second intake tunnel 4 is not more than 1.2mm, or minimum sectional area is not more than 1.13mm
2.The preferred smallest cross-sectional diameter of the present embodiment is not more than 1.0mm, or minimum sectional area is not more than 0.78mm
2.This structure is convenient to improve water velocity, and while making flow very little, the current that flow out from the second intake tunnel also can impeller 6 rotate.
Minute-pressure open valve 8 comprises flap 8-1, the sealing gasket 8-2 and the first spring 8-3 that are arranged in the first intake tunnel 3, and valve import.Sealing gasket 8-2 is arranged on flap 8-1.It is upper that one end of the first spring 8-3 is against flap 8-1, and the other end is against on the inwall of the first intake tunnel 3.Valve import place part connects with the inner wall sealing of the first intake tunnel 3.Between the inwall of the outside of flap 8-1 and the first intake tunnel 3, be provided with guide frame.The valve import of the present embodiment is the first inlet opening 3-1 of the porch that is arranged on the first intake tunnel 3.When minute-pressure open valve 8 is closed, sealing gasket 8-2 is against the first 3-1 place, inlet opening and makes it sealing under the elastic force effect of the first spring 8-3.
The function of minute-pressure open valve 8 is: when the flow of this flow sensor of flowing through is less than 200L/min, because of the speed of current very little, pipeline linear loss is very little, the pressure reduction between minute-pressure open valve 8 entrance ends is very little, the in the situation that of such micro-pressure-difference, minute-pressure open valve 8 is in closed condition, and whole current of this flow sensor that makes to flow through all flow through by the second intake tunnel 4, are convenient to detect small flow; And when the flow of this flow sensor of flowing through is not less than 200L/min, relatively large because of the speed of current, pipeline linear loss is also larger, the pressure reduction between minute-pressure open valve 8 entrance ends is also larger, and at this moment, minute-pressure open valve 8 is in opening.
Moving core 9 is arranged in the second intake tunnel 4, and the second magnet 10 is arranged on moving core 4, on the position of the second corresponding the second magnet 10 in intake tunnel 4 outsides, second Hall element or tongue tube 11 is set.The porch of the second intake tunnel 4 is provided with the second inlet opening 4-1 that diameter is not more than 1.2mm.The bottom of moving core 9 has the surface of concave shape, and the bottom to moving core 9 is rectified in the water outlet of the second inlet opening 4-1, to make full use of into the moving core 9 of water kinetic energy promotion, moves, and detects small flow.
The power that the moving core 9 of the present embodiment resets is the gravity of core 9 self, and the moving direction of moving core 9 is vertical direction, and current flow from bottom to top.
(embodiment 2)
See Fig. 2, the present embodiment is substantially the same manner as Example 1, and difference is: also comprise the second spring 12.
The second spring 12 is arranged in the second intake tunnel 4.One end of the second spring 12 is against on moving core 9, and the other end is against on the inwall of the second intake tunnel 4.
The power that the moving core 9 of the present embodiment resets is the elastic force of the second spring 12, and the moving direction of moving core 9 is preferably horizontal direction.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. flow sensor, is characterized in that: comprise water inlet (1), water delivering orifice (2), the first intake tunnel (3), the second intake tunnel (4), impeller cavity (5), impeller (6), the first magnet (7), minute-pressure open valve (8) and the first Hall element; The entrance of described the first intake tunnel (3) and the second intake tunnel (4) is all communicated with water inlet (1); The outlet of the first intake tunnel (3) and the second intake tunnel (4) is communicated with respectively impeller cavity (5); The outlet of described impeller cavity (5) is communicated with water delivering orifice (2); Described impeller (6) is arranged in impeller cavity (5); Described the first magnet (7) is arranged on impeller (6); On the position of described impeller cavity (5) corresponding the first magnet in outside (7), first Hall element is set; Described minute-pressure open valve (8) is arranged in the first intake tunnel (3).
2. flow sensor according to claim 1, is characterized in that: also comprise moving core (9), the second magnet (10) and the second Hall element or tongue tube (11); Described moving core (9) is arranged in the second intake tunnel (4), and it is upper that the second magnet (10) is arranged on moving core (4), on the position of the second intake tunnel (4) corresponding the second magnet in outside (10), second Hall element or tongue tube (11) is set.
3. flow sensor according to claim 1, is characterized in that: described the first magnet (7) is provided with two; Described two blocks of first magnet (7) are separately positioned on the symmetric position of the both sides, center of impeller (6), and the N utmost point of two the first magnet (7) and S are extremely mutually oppositely.
4. flow sensor according to claim 1, is characterized in that: the smallest cross-sectional diameter of described the first intake tunnel (3) is not less than 3mm, or minimum sectional area is not less than 7mm
2.
5. flow sensor according to claim 1, is characterized in that: the smallest cross-sectional diameter of described the second intake tunnel (4) is not more than 1.2mm, or minimum sectional area is not more than 1.13mm
2.
6. flow sensor according to claim 1, it is characterized in that: during described flow sensor operation, the gap that can produce between the part relatively moving is at least 0.1mm, and the porch of the first intake tunnel (3) and the second intake tunnel (4) is equipped with filtering element (13).
7. flow sensor according to claim 2, is characterized in that: the porch of described the second intake tunnel (4) is provided with the second inlet opening (4-1) that diameter is not more than 1.2mm; The bottom of described moving core (9) has the surface of concave shape, and the bottom to moving core (9) is rectified in the water outlet of the second inlet opening (4-1).
8. flow sensor according to claim 1, is characterized in that: the rotating shaft (6-1) of described impeller (6) is horizontally disposed with.
9. flow sensor according to claim 1, is characterized in that: described minute-pressure open valve (8) comprises the flap (8-1), sealing gasket (8-2) and the first spring (8-3) that are arranged in the first intake tunnel (3), and valve import; Described sealing gasket (8-2) is arranged on flap (8-1); It is upper that one end of described the first spring (8-3) is against flap (8-1), and the other end is against on the inwall of the first intake tunnel (3); Described valve import place part connects with the housing seal of the first intake tunnel (3); Between the inwall of the outside of described flap (8-1) and the first intake tunnel (3), be provided with guide frame.
10. flow sensor according to claim 2, is characterized in that: also comprise the second spring (12) being arranged in the second intake tunnel (4); It is upper that one end of described the second spring (12) is against moving core (9), and the other end is against on the inwall of the second intake tunnel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210152203.3A CN102661762B (en) | 2012-05-15 | 2012-05-15 | Flow sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210152203.3A CN102661762B (en) | 2012-05-15 | 2012-05-15 | Flow sensor |
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| Publication Number | Publication Date |
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| CN102661762A CN102661762A (en) | 2012-09-12 |
| CN102661762B true CN102661762B (en) | 2014-04-16 |
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| CN201210152203.3A Expired - Fee Related CN102661762B (en) | 2012-05-15 | 2012-05-15 | Flow sensor |
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| CN104422486B (en) * | 2013-08-22 | 2017-08-01 | 上海科勒电子科技有限公司 | A kind of flowmeter |
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| CN110044426A (en) * | 2019-04-08 | 2019-07-23 | 杨国庆 | A kind of flow sensor of multichannel flow linkage |
| CN110749356B (en) * | 2019-10-16 | 2021-08-31 | 扬州鑫昊重型机械有限公司 | Electric signal flowmeter |
| CN113237523B (en) * | 2021-05-11 | 2022-09-27 | 福州福达仪表有限公司 | Water meter |
| CN113568050A (en) * | 2021-07-16 | 2021-10-29 | 厦门市欧立通电子科技开发有限公司 | A liquid flow detector |
| CN114252113A (en) * | 2021-12-14 | 2022-03-29 | 中山市思源电器有限公司 | A stable water flow sensor |
| CN115961906B (en) * | 2022-12-15 | 2024-02-27 | 江苏雄越石油机械设备制造有限公司 | Extra-high voltage wellhead device |
| CN119289202B (en) * | 2024-12-16 | 2025-03-07 | 山东鲁盾聚氨酯制品有限公司 | Hydraulic engineering antiseep drainage pipe |
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| EP0834721A2 (en) * | 1996-10-04 | 1998-04-08 | Bürkert Werke GmbH & Co. | Flow sensor |
| CN2420622Y (en) * | 2000-04-06 | 2001-02-21 | 青岛琴翔电器技术研究所有限公司 | Water current sensor |
| CN201170735Y (en) * | 2008-02-03 | 2008-12-24 | 广东万家乐燃气具有限公司 | Low pressure start water flow sensor |
| CN202748070U (en) * | 2012-05-15 | 2013-02-20 | 江苏正本净化节水科技实业有限公司 | Flow sensor |
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2012
- 2012-05-15 CN CN201210152203.3A patent/CN102661762B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0834721A2 (en) * | 1996-10-04 | 1998-04-08 | Bürkert Werke GmbH & Co. | Flow sensor |
| CN2420622Y (en) * | 2000-04-06 | 2001-02-21 | 青岛琴翔电器技术研究所有限公司 | Water current sensor |
| CN201170735Y (en) * | 2008-02-03 | 2008-12-24 | 广东万家乐燃气具有限公司 | Low pressure start water flow sensor |
| CN202748070U (en) * | 2012-05-15 | 2013-02-20 | 江苏正本净化节水科技实业有限公司 | Flow sensor |
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