CN102854227A - Detecting device and detecting method of target-type fluid - Google Patents
Detecting device and detecting method of target-type fluid Download PDFInfo
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- CN102854227A CN102854227A CN2011101842766A CN201110184276A CN102854227A CN 102854227 A CN102854227 A CN 102854227A CN 2011101842766 A CN2011101842766 A CN 2011101842766A CN 201110184276 A CN201110184276 A CN 201110184276A CN 102854227 A CN102854227 A CN 102854227A
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Abstract
The invention relates to a detecting device of target-type fluid, including a target rod, an electric loop having a first detecting point and a second detecting point; and a switch connected between the first detecting point and the second detecting point of the electric loop. The target rod has one end connected with the water flow switch to drive the switch to open and close, the other end extending into a fluid pipe; it is characterized in that the water flow switch is parallelly connected to at least one first electric resistor; meanwhile, the water flow switch is in series connection with at least one second electric resistor. An resistance value detecting device is also included, the resistance value detecting device is connected with the first detecting point and the second detecting point. By measuring the resistance value between the first detecting point and the second detecting point, the state of the fluid in pipe is determined, thus avoiding failure of machine set in case of short-circuiting of the switch.
Description
Technical field
The present invention relates to a kind of target formula fluid detecting device and detection method.
Background technology
At present target formula fluid detecting device is used in a large number on other electronic products such as air-conditioning unit and protects.See also Fig. 1; the principle of work of the target formula fluid detecting device on the market is: the setting output signal is dry contact; during use by detecting the state (closing of contact when having fluid to pass through of the switch S 1 between contact A, the B; without fluid by the time contact disconnect) judged whether that fluid passes through, thereby carry out water cut-off protection.But the switch protection of fluid frequently occurs owing to the reasons such as engineering make unit, or fluid induction installation itself damages and causes the fluid switch protection.Many users force to remove protection, thereby make the fluid induction installation ineffective in order to save trouble with two dry contact short circuits.The unit of operation is easy to damage in this case.
Summary of the invention
The object of the present invention is to provide a kind of can not be by target formula fluid detecting device and the detection method thereof of short circuit.
A kind of target formula fluid detecting device that the present invention relates to, it comprises the target bar, has the electric loop of the first check point, the second check point; And be connected to switch between described electric loop the first check point, the second check point; Described target bar one end connects described switch, drives the disconnection of switch with closed, and the other end stretches in the fluid circuit.Described switch in parallel connects at least one first resistance; Described switch is connected to few second resistance.Also include the 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.Can carry out accurately water cut-off protection.
Further, the parallel-connection structure of described switch and described at least one the first resistance is connected in series at least one second resistance jointly.By detecting the concrete state of the fluid in the resistance value judgement pipeline between the first check point, the second check point.
Further, the cascaded structure of described switch and described at least one the second resistance is connected in parallel at least one first resistance jointly.By detecting the concrete state of the fluid in the resistance value judgement pipeline between the first check point, the second check point.
Further, described electric loop, described switch and described the first resistance, the second resistance are located on the printed circuit board (PCB).Electric loop, switch, the first resistance and the second resistance is arranged on the printed circuit board (PCB) can saves the space, and then the volume of reduction target formula fluid detecting device.Simultaneously also so that operate safer.
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.So that operation is more easy, quick when detecting.
The present invention also provides a kind of detection method of target formula fluid detecting device, comprises the steps, detects resistance between described the first check point and described the second check point by described resistance pick-up unit;
When the resistance between described the first check point and described the second check point is the first resistance, judge to be short circuit between described the first check point and described the second check point.
When the resistance between described the first check point and described the second check point is the second resistance, judge in the described pipeline to have fluid.
Resistance between described the first check point and described the second check point is in the 3rd resistance, judges in the described pipeline without fluid.Then can know according to this and judge that accurately fluid passes through state.
Compared with prior art, the target formula fluid detecting device in the technical program is at described switch at least one the first resistance that is connected in parallel.Described switch is connected to few second resistance.By measuring the state of fluid in the resistance judgement pipeline between the first check point and the second check point.Unit breaks down when having avoided switch by short circuit.
Description of drawings
Fig. 1 is the circuit diagram that prior art adopts;
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 a plurality of embodiment the technical program is described further.
Embodiment one
See also Fig. 2, Fig. 3 and Fig. 4, target formula fluid detecting device 1 comprises main body 2, is 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 comprise water, ethylene glycol and other any on target bar 5 and pipeline 3 material therefors thereof without corrosive attack and on the liquid of sealing property without impact.Describe as an example of water example in the present embodiment.Main body 2 has top 7.Circuit board 4 is arranged on 7 inside, top.The edge of circuit board 4 stretches out between the first check point 12 and the second check point 13 and the first check point 12 and the second check point 13 the resistance pick-up unit is set, and the resistance pick-up unit is for detection of the resistance value between two check points.At least one first resistance 9 and at least one second resistance 10 also is set on the circuit board 4.The switch 11 be positioned at 13 of the first check points 12, the second check point also is set on the circuit board 4.In the present embodiment, describe as example to have first resistance 9 and second resistance 10.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, the first resistance 9, the second resistance 10, electric loop and switch 11 are located on the circuit board 4, be understandable that, the first resistance 9, the second resistance 10, electric loop and switch 11 can not be located on the circuit board yet, are electrical communication as long as satisfy between above-mentioned a few person.Target bar 5 one end connecting valves 11 drive the disconnection of switch 11 with closed, and the other end stretches in the fluid circuit 3, with pipeline 3 interior the fluid-phase of process contact.Along with thereby the motion of the fluxion strap moving-target bar 5 of pipeline 3 inner fluids drives the disconnection of switch 11 with closed.
Detection method below in conjunction with target formula fluid detecting device 1 is described further it.
See also Fig. 2, Fig. 3 and Fig. 4, utilize the resistance pick-up unit to detect resistance between the first check point 12 and the second check point 13, the resistance of 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 the resistance between the first check point 12 and the second check point 13 is R2, have current in the pipeline 3.When the resistance between the first check point 12 and the second check point 13 is R1+R2, non-water flow in the pipeline 3, need carry out the water cut-off protection operation this moment.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 the resistance between the first check point 12 and the second check point 13 is the resistance value of R1+R2, have current in the pipeline 3.When the resistance between the first check point 12 and the second check point 13 is R2, non-water flow in the pipeline 3, need carry out the water cut-off protection operation this moment.
Embodiment two
See also Fig. 5, the structure of the target formula fluid detecting device that the present embodiment provides and the target formula fluid detecting device among the embodiment one is roughly the same, and its distinctive points is: described switch 6 is connected in parallel at least one first resistance 9 jointly with the cascaded structure of described at least one the second resistance 10.Same, describe for example to have 9, one the second resistance 10 of first resistance in the present embodiment.
Detection method below in conjunction with target formula fluid detecting device 1 is described further it.
See also Fig. 2 and Fig. 5, utilize the resistance pick-up unit to detect resistance between the first check point 12 and the second check point 13, the resistance of 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 the resistance between the first check point 12 and the second check point 13 is the resistance value of R1*R2/ (R1+R2), have current in the pipeline 3.When the resistance between the first check point 12 and the second check point 13 is R1, non-water flow in the pipeline 3, need carry out the water cut-off protection operation this moment.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 the 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 the pipeline 3.When the resistance between the first check point 12 and the second check point 13 is R1, in the pipeline 3 current are arranged.
Be understandable that, when having a plurality of the first resistance and a plurality of the second resistance, regardless of the connecting mode between a plurality of and the first resistance, the second resistance be, if satisfy the first contact and the second contact have fluid 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 at described switch at least one the first resistance that is connected in parallel.Described switch is connected to few second resistance.By measuring the state of fluid in the resistance judgement pipeline between the first check point and the second check point.Unit breaks down when having avoided switch by short circuit.
Above-listed detailed description is that this embodiment limits claim of the present invention for the specifying of one of invention possible embodiments, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.
Claims (6)
1. target formula fluid detecting device, it comprises the target bar,
Electric loop with the first check point, second check point;
And be connected to described first check point in described electric loop, the switch between the second check point;
Described target bar one end connects described switch, drives the disconnection of described switch with closed, and the other end stretches in the fluid circuit, it is characterized in that,
Described switch in parallel connects at least one first resistance; Simultaneously, described switch is connected in series described at least one second resistance;
Also include the resistance pick-up unit, described resistance pick-up unit connects described the first check point, the second check point.
2. target formula fluid detecting device as claimed in claim 1 is characterized in that, the parallel-connection structure of described switch and described at least one the first resistance is connected in series in described at least one second resistance jointly.
3. target formula fluid detecting device as claimed in claim 1 is characterized in that, the cascaded structure of described switch and described at least one the second resistance is connected in parallel in described at least one first resistance jointly.
4. one kind such as the described target formula of claim 1-3 any one fluid detecting device, it is characterized in that, described electric loop, described switch and described the first resistance, the second resistance are located on the printed circuit board (PCB).
5. a target formula fluid detecting device as claimed in claim 4 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.
6. the detection method such as the described target formula of claim 1-3 any one fluid detecting device is characterized in that, comprise the steps,
Detect resistance between described the first check point and described the second check point by described resistance pick-up unit;
When the resistance between described the first check point and described the second check point is the first resistance, judge to be short circuit between described the first check point and described the second check point;
When the resistance between described the first check point and described the second check point is the second resistance, judge in the described pipeline to have fluid;
Resistance between described the first check point and described the second check point is in the 3rd resistance, judges in the described pipeline without fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110184276.6A CN102854227B (en) | 2011-07-01 | 2011-07-01 | Detecting device and detecting method of target-type fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110184276.6A CN102854227B (en) | 2011-07-01 | 2011-07-01 | Detecting device and detecting method of target-type fluid |
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| Publication Number | Publication Date |
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| CN102854227A true CN102854227A (en) | 2013-01-02 |
| CN102854227B CN102854227B (en) | 2014-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539472A (en) * | 2018-10-10 | 2019-03-29 | 珠海格力电器股份有限公司 | Target chip water flow switch, cooler, control method, equipment and medium |
Citations (7)
| 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 fluid detecting device |
-
2011
- 2011-07-01 CN CN201110184276.6A patent/CN102854227B/en active Active
Patent Citations (7)
| 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 fluid detecting device |
Non-Patent Citations (2)
| Title |
|---|
| 姬鹏先等: "流量开关在中央空调系统中的应用研究", 《流体机械》 * |
| 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》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539472A (en) * | 2018-10-10 | 2019-03-29 | 珠海格力电器股份有限公司 | Target chip water flow switch, cooler, control method, equipment and medium |
| 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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| CN102854227B (en) | 2014-12-24 |
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