CN102854227B - Target type fluid detection device and detection method - Google Patents
Target type fluid detection device and detection method Download PDFInfo
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- CN102854227B CN102854227B CN201110184276.6A CN201110184276A CN102854227B CN 102854227 B CN102854227 B CN 102854227B CN 201110184276 A CN201110184276 A CN 201110184276A CN 102854227 B CN102854227 B CN 102854227B
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- resistance
- check point
- switch
- fluid
- detecting device
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- 239000012530 fluid Substances 0.000 title claims abstract description 53
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
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Abstract
The invention relates to a target type fluid detection device, which comprises a target rod, an electric circuit and a detection device, wherein the electric circuit is provided with a first detection point and a second detection point; and a switch connected between the first detection point and the second detection point of the electric loop. One end of the target rod is connected with the water flow switch to drive the switch to be switched off and switched on, and the other end of the target rod extends into the fluid pipeline; the water flow switch is characterized in that the water flow switch is connected with at least one first resistor in parallel; meanwhile, the water flow switch is connected with at least one second resistor in series. The resistance value detection device is connected with the first detection point and the second detection point. And judging the state of the fluid in the pipeline by measuring the resistance value between the first detection point and the second detection point. Thus avoiding the occurrence of a fault in the group when the switch is shorted.
Description
Technical field
The present invention relates to a kind of target formula fluid detecting device and detection method.
Background technology
Current target formula fluid detecting device is used on other electronic products such as air-conditioner set in a large number to be protected.Refer to Fig. 1; the principle of work of the target formula fluid detecting device on market is: setting output signal is dry contact; during use by detect contact A, switch S 1 between B state (have fluid by time the closing of contact; without fluid by time contact disconnect) judged whether that fluid passes through, thus carry out water cut-off protection.But because the reasons such as engineering make unit frequently occur the switch protection of fluid, or fluid induction installation damage itself causes fluid switch to be protected.Many users, in order to save trouble by two dry contact short circuits, force to remove protection, thus make fluid induction installation ineffective.The unit run in this case is easy to damage.
Summary of the invention
The object of the present invention is to provide a kind of can not by the target formula fluid detecting device of short circuit and detection method thereof.
A kind of target formula fluid detecting device that the present invention relates to, it comprises target bar, has the electric loop of the first check point, the second check point; And the switch be connected between described electric loop first check point, the second check point; Described target bar one end connects described switch, and drive the disconnection of switch with closed, the other end stretches in fluid circuit.Described switch in parallel connects at least one first resistance; Described switch is connected to few second resistance.Also include resistance pick-up unit, described resistance pick-up unit connects the first check point, the second check point.The status information of fluid is converted into the form of concrete resistance value.Water cut-off protection can be carried out accurately.
Further, the parallel-connection structure of described switch and at least one the first resistance described is connected in series at least one second resistance jointly.The concrete state of the fluid in pipeline is judged by the resistance value detected between the first check point, the second check point.
Further, the cascaded structure of described switch and at least one the second resistance described is connected in parallel at least one first resistance jointly.The concrete state of the fluid in pipeline is judged by the resistance value detected between the first check point, the second check point.
Further, described electric loop, described switch and described first resistance, the second resistance are located on printed circuit board (PCB).Electric loop, switch, the first resistance and the second resistance are arranged and can save space on a printed circuit, and then the volume of reduction target formula fluid detecting device.Also make operation safer simultaneously.
Further, described fluid detecting device also comprises target formula switch main body, and described printed circuit board (PCB) is located at described target formula switch main body top.When making to detect, operation is more easy, fast.
The present invention also provides a kind of detection method of target formula fluid detecting device, comprises the steps, detects the resistance between described first check point and described second check point by described resistance pick-up unit;
When resistance between described first check point and described second check point is the first resistance, judge between described first check point and described second check point as short circuit.
When resistance between described first check point and described second check point is the second resistance, judge, in described pipeline, there is fluid.
Resistance between described first check point and described second check point judges in described pipeline without fluid when being the 3rd resistance.Then can know according to this and judge that fluid passes through state accurately.
Compared with prior art, the target formula fluid detecting device in the technical program is connected in parallel at least one the first resistance on described switch.Described switch is connected to few second resistance.The state of fluid in pipeline is judged by the resistance measured between the first check point and the second check point.Avoid switch to be broken down by unit during short circuit.
Accompanying drawing explanation
The circuit diagram that Fig. 1 adopts for prior art;
Fig. 2 is the structural representation of the target formula fluid detecting device of the technical program embodiment one;
Fig. 3 is the circuit board schematic diagram of the target formula fluid detecting device of the technical program embodiment one;
Fig. 4 is the circuit diagram of the target formula fluid detecting device of the technical program embodiment one;
Fig. 5 is the circuit diagram of the target formula fluid detecting device of the technical program embodiment two.
Embodiment
Below in conjunction with accompanying drawing and multiple embodiment, the technical program is described further.
Embodiment one
Refer to Fig. 2, Fig. 3 and Fig. 4, target formula fluid detecting device 1 comprise main body 2, be located at the pipeline 3 of main body 2 inside, circuit board 4, target bar 5 and resistance pick-up unit (not shown).Target formula fluid detecting device 1 can detect and comprise water, ethylene glycol and other is any on target bar 5 and the corrosion-free effect of pipeline 3 material therefor thereof and on the liquid of sealing property without impact.Be described for water in the present embodiment.Main body 2 has top 7.It is inner that circuit board 4 is arranged on top 7.The edge of circuit board 4 stretches out the first check point 12 and the second check point 13 and arranges resistance pick-up unit between the first check point 12 and the second check point 13, and resistance pick-up unit is for detecting the resistance value between two check points.Circuit board 4 is also arranged at least one first resistance 9 and at least one second resistance 10.Circuit board 4 is also arranged the switch 11 be positioned between the first check point 12, second check point 13.In the present embodiment, there is first resistance 9 and second resistance 10 is described.The parallel-connection structure of switch 11 and the first resistance 9 is connected in series in the second resistance 10 jointly.In the middle of the present embodiment, first resistance 9, second resistance 10, electric loop and switch 11 are established on the circuit board 4, be understandable that, the first resistance 9, second resistance 10, electric loop and switch 11 also can not be established on circuit boards, as long as meeting between above-mentioned a few person is electrical communication.Target bar 5 one end connecting valve 11, drive the disconnection of switch 11 with closed, the other end stretches in fluid circuit 3, with in pipeline 3 the fluid-phase of process contact.Along with the fluxion strap moving-target bar 5 of pipeline 3 inner fluid motion thus drive the disconnection of switch 11 with closed.
Detection method below in conjunction with target formula fluid detecting device 1 is described further it.
Refer to Fig. 2, Fig. 3 and Fig. 4, utilize resistance pick-up unit to detect resistance between the first check point 12 and the second check point 13, the resistance setting the first resistance 9 is R1, and the resistance of the second resistance 10 is R2.The off-state of switch 11 is set as general state, when the resistance between the first check point 12 and the second check point 13 is zero, shows short circuit between the first check point 12 and the second check point 13.When resistance between the first check point 12 and the second check point 13 is R2, in pipeline 3, there are current.When resistance between the first check point 12 and the second check point 13 is R1+R2, non-water flow in pipeline 3, now needs to carry out water cut-off protection operation.When the closure state of switch 6 is set as general normality, when the resistance between the first check point 12 and the second check point 13 is zero, show short circuit between the first check point 12 and the second check point 13.When resistance between the first check point 12 and the second check point 13 is the resistance value of R1+R2, in pipeline 3, there are current.When resistance between the first check point 12 and the second check point 13 is R2, non-water flow in pipeline 3, now needs to carry out water cut-off protection operation.
Embodiment two
Refer to Fig. 5, the target formula fluid detecting device that the present embodiment provides is roughly the same with the structure of the target formula fluid detecting device in embodiment one, and its distinctive points is: described switch 6 is connected in parallel at least one first resistance 9 jointly with the cascaded structure of at least one the second resistance 10 described.Same, be described there is first resistance 9, second resistance 10 for example in the present embodiment.
Detection method below in conjunction with target formula fluid detecting device 1 is described further it.
Refer to Fig. 2 and Fig. 5, utilize resistance pick-up unit to detect resistance between the first check point 12 and the second check point 13, the resistance setting the first resistance is R1, and the resistance of the second resistance is R2.The off-state of switch 11 is set as general state, when the resistance between the first check point 12 and the second check point 13 is zero, shows short circuit between the first check point 12 and the second check point 13.When resistance between the first check point 12 and the second check point 13 is the resistance value of R1*R2/ (R1+R2), in pipeline 3, there are current.When resistance between the first check point 12 and the second check point 13 is R1, non-water flow in pipeline 3, now needs to carry out water cut-off protection operation.When the closure state of switch 11 is set as general normality, when the resistance between the first check point 12 and the second check point 13 is zero, show short circuit between the first check point 12 and the second check point 13.When resistance between the first check point 12 and the second check point 13 is the resistance value of R1*R2/ (R1+R2), non-water flow in pipeline 3.When resistance between the first check point 12 and the second check point 13 is R1, in pipeline 3, there are current.
Be understandable that, when having multiple first resistance and multiple second resistance, regardless of multiple and connecting mode between the first resistance, the second resistance is, if meet the first contact and the second contact there being fluid to pass through, without fluid by two different conditions under resistance value between the first check point and the second check point unequal.
Target formula fluid detecting device in the technical program is connected in parallel at least one the first resistance on described switch.Described switch is connected to few second resistance.The state of fluid in pipeline is judged by the resistance measured between the first check point and the second check point.Avoid switch to be broken down by unit during short circuit.
Above-listed detailed description is illustrating for one of invention possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (4)
1. a target formula fluid detecting device, it comprises target bar,
There is the electric loop of the first check point, the second check point;
And the switch be connected between described first check point in described electric loop, the second check point;
Described target bar one end connects described switch, and drive the disconnection of described switch with closed, the other end stretches in fluid circuit, it is characterized in that,
Described switch in parallel connects at least one first resistance; Meanwhile, described switch is connected to few second resistance;
Also include resistance pick-up unit, described resistance pick-up unit connects described first check point, the second check point;
The parallel-connection structure of described switch and at least one the first resistance described is connected in series at least one second resistance described jointly, or the cascaded structure of described switch and at least one the second resistance described is connected in parallel at least one first resistance described jointly.
2. a target formula fluid detecting device as claimed in claim 1, is characterized in that, described electric loop, described switch and described first resistance, the second resistance are located on printed circuit board (PCB).
3. a target formula fluid detecting device as claimed in claim 2, is characterized in that, described target formula fluid detecting device also comprises target formula switch main body, and described printed circuit board (PCB) is located at described target formula switch main body top.
4. a detection method for the target formula fluid detecting device as described in claim 1-3 any one, is characterized in that,
Comprise the steps,
The resistance between described first check point and described second check point is detected by described resistance pick-up unit;
When resistance between described first check point and described second check point is zero, judge between described first check point and described second check point as short circuit;
When resistance between described first check point and described second check point is the second resistance, judge, in described pipeline, there is fluid;
Resistance between described first check point and described second check point judges in described pipeline without fluid when being the 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110184276.6A CN102854227B (en) | 2011-07-01 | 2011-07-01 | Target type fluid detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110184276.6A CN102854227B (en) | 2011-07-01 | 2011-07-01 | Target type fluid detection device and detection method |
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| Publication Number | Publication Date |
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| CN102854227A CN102854227A (en) | 2013-01-02 |
| CN102854227B true CN102854227B (en) | 2014-12-24 |
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| CN201110184276.6A Active CN102854227B (en) | 2011-07-01 | 2011-07-01 | Target type fluid detection device and detection method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109539472B (en) * | 2018-10-10 | 2020-01-03 | 珠海格力电器股份有限公司 | Target sheet type water flow switch, cooling machine, control method, equipment and medium |
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|---|---|---|---|---|
| US3910118A (en) * | 1972-02-02 | 1975-10-07 | Gerdts Gustav F Kg | Probe for controlling the level of electrically conductive liquids |
| US4191951A (en) * | 1977-05-16 | 1980-03-04 | Caterpillar Tractor Co. | Device for sensing fluid forces |
| US4324268A (en) * | 1979-08-24 | 1982-04-13 | Jacobson Avram A | Automatic flood control valve |
| CN2591827Y (en) * | 2002-12-25 | 2003-12-10 | 泰豪科技股份有限公司 | Water flow turning-on &-off motion monitoring & protector |
| CN2711485Y (en) * | 2004-07-26 | 2005-07-20 | 王青远 | Leakage proof self-control water valve |
| CN101101164A (en) * | 2007-07-31 | 2008-01-09 | 四川长虹电器股份有限公司 | water chilling unit control system and its control method |
| CN202133443U (en) * | 2011-07-01 | 2012-02-01 | 珠海格力电器股份有限公司 | Target type fluid detection device |
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2011
- 2011-07-01 CN CN201110184276.6A patent/CN102854227B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3910118A (en) * | 1972-02-02 | 1975-10-07 | Gerdts Gustav F Kg | Probe for controlling the level of electrically conductive liquids |
| US4191951A (en) * | 1977-05-16 | 1980-03-04 | Caterpillar Tractor Co. | Device for sensing fluid forces |
| US4324268A (en) * | 1979-08-24 | 1982-04-13 | Jacobson Avram A | Automatic flood control valve |
| CN2591827Y (en) * | 2002-12-25 | 2003-12-10 | 泰豪科技股份有限公司 | Water flow turning-on &-off motion monitoring & protector |
| CN2711485Y (en) * | 2004-07-26 | 2005-07-20 | 王青远 | Leakage proof self-control water valve |
| CN101101164A (en) * | 2007-07-31 | 2008-01-09 | 四川长虹电器股份有限公司 | water chilling unit control system and its control method |
| CN202133443U (en) * | 2011-07-01 | 2012-02-01 | 珠海格力电器股份有限公司 | Target type fluid detection device |
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| 毕明华.靶式流量开关在空压机断水保护中的应用.《煤矿机械》.2008,第29卷(第6期),168-170. * |
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| CN102854227A (en) | 2013-01-02 |
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