CN202133443U - Target fluid detecting device - Google Patents
Target fluid detecting device Download PDFInfo
- Publication number
- CN202133443U CN202133443U CN201120230981U CN201120230981U CN202133443U CN 202133443 U CN202133443 U CN 202133443U CN 201120230981 U CN201120230981 U CN 201120230981U CN 201120230981 U CN201120230981 U CN 201120230981U CN 202133443 U CN202133443 U CN 202133443U
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- resistance
- switch
- check point
- detecting device
- target
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Abstract
The utility model relates to a target fluid detecting device. The target fluid detecting device comprises a target rod with an electric circuit of 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 circuit. One end of the target rod is connected with a water flow switch to drive the switch to be off and on, and the other end of the target rod extends into a fluid pipeline; the target fluid detecting device is characterized in that the water flow switch is connected with at least one first resistor in parallel; and the water flow switch is connected with at least one second resistor in series. The target fluid detecting device also comprises a resistance detecting device which is connected with the first detecting point and the second detecting point. The state of fluid in the pipeline is judged by measuring resistance value between the first detecting point and the second detecting point, therefore, set fault during short circuit of switch is avoided.
Description
Technical field
The utility model relates to a kind of target formula fluid detecting device.
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: setting the output signal is dry contact; During use through detecting the state (closing of contact when having fluid to pass through of the switch S 1 between contact A, the B; No fluid through the time contact break off) judged whether that fluid passes through, thereby carry out water cut-off protection.But the switch protection of fluid frequently occurs owing to 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 utility model purpose be to provide a kind of can not be by the target formula fluid detecting device of short circuit.
A kind of target formula fluid detecting device that the utility model relates to, it comprises the target bar, has the electric loop of first check point, second check point; And be connected the switch between said electric loop first check point, second check point; Said target bar one end connects said switch, and the disconnection that drives switch is with closed, and the other end stretches in the fluid circuit.Said switch in parallel connects at least one first resistance; Said switch is connected to few one second resistance.Also include the resistance pick-up unit, said resistance pick-up unit connects first check point, second check point.The status information of fluid is converted into the form of concrete resistance value.Can carry out water cut-off protection accurately.
Further, the parallel-connection structure of said switch and said at least one first resistance is connected in series at least one second resistance jointly.Through detecting the concrete state of the fluid in the resistance value judgement pipeline between first check point, second check point.
Further, the cascaded structure of said switch and said at least one second resistance is connected in parallel at least one first resistance jointly.Through detecting the concrete state of the fluid in the resistance value judgement pipeline between first check point, second check point.
Further, said electric loop, said switch and said first resistance, second resistance are located on the printed circuit board (PCB).Electric loop, switch, first resistance and 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, make also that simultaneously operation is safer.
Further, said fluid detecting device also comprises target formula switch main body, and said printed circuit board (PCB) is located at said target formula switch main body top, makes that operation is more easy when detecting, and is quick.
Compared with prior art, at least one first resistance that on said switch, is connected in parallel of the target formula fluid detecting device in the present technique scheme.Said switch is connected to few one second resistance.Through measuring the state of fluid in the resistance judgement pipeline between first check point and 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 adopted;
Fig. 2 is the structural representation of the target formula fluid detecting device of present technique scheme implementation example one;
Fig. 3 is the circuit board synoptic diagram of the target formula fluid detecting device of present technique scheme implementation example one;
Fig. 4 is the circuit diagram of the target formula fluid detecting device of present technique scheme implementation example one;
Fig. 5 is the circuit diagram of the target formula fluid detecting device of present technique scheme implementation example two.
Embodiment
To combine accompanying drawing and a plurality of embodiment that the present technique scheme is done further explanation below.
Embodiment one
See also Fig. 2, Fig. 3 and Fig. 4, target formula fluid detecting device 1 comprises main body 2, is located at pipeline 3, circuit board 4, target bar 5 and the resistance pick-up unit of main body 2 inside (figure does not show).Target formula fluid detecting device 1 can detect and comprise that water, monoethylene glycol and other are any to target bar 5 and pipeline 3 material therefors do not have corrosive attack and sealing property do not had the liquid of influence.Be that example describes with water in the present embodiment.Main body 2 has top 7, and circuit board 4 is arranged on 7 inside, top.The edge of circuit board 4 stretches out between first check point 12 and second check point 13 and first check point 12 and second check point 13 the resistance pick-up unit is set, and the resistance pick-up unit is used to detect two resistance values between the check point.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 first check points 12, second check point also is set on the circuit board 4.In the present embodiment, to have one first resistance 9 and one second resistance 10 is that example describes.The parallel-connection structure of the switch 11 and first resistance 9 is connected in series in second resistance 10 jointly.In the middle of present embodiment; First resistance 9, second resistance 10, electric loop and switch 11 are located on the circuit board 4; It is understandable that first resistance 9, 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 ends connect switch 11, and the disconnection that drives switch 11 is with closed, and the other end stretches in the fluid circuit 3, with in the pipeline 3 the fluid of process contact.Thereby the disconnection that drives switch 11 along with the motion of the fluxion strap moving-target bar 5 of pipeline 3 inner fluids is 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 the resistance between first check point 12 and second check point 13, the resistance of setting first resistance 9 is R1, and the resistance of second resistance 10 is R2.The off-state of switch 11 is set at general state, when the resistance between first check point 12 and second check point 13 is zero, shows short circuit between first check point 12 and second check point 13.When the resistance between first check point 12 and second check point 13 is R2, have current in the pipeline 3.When the resistance between first check point 12 and second check point 13 is R1+R2, there are not current in the pipeline 3, need carry out the water cut-off protection operation this moment.When the closure state of switch 6 is set at general normality, when the resistance between first check point 12 and second check point 13 is zero, show short circuit between first check point 12 and second check point 13.When the resistance between first check point 12 and second check point 13 is the resistance value of R1+R2, have current in the pipeline 3.When the resistance between first check point 12 and second check point 13 is R2, there are not current in the pipeline 3, need carry out the water cut-off protection operation this moment.
Embodiment two
See also Fig. 5; The structure of target formula fluid detecting device that present embodiment provided and the target formula fluid detecting device among the embodiment one is roughly the same; Its distinctive points is that said switch 6 is connected in parallel at least one first resistance 9 jointly with the cascaded structure of said at least one second resistance 10.Same, describe for example to have 9, one second resistance 10 of one 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 the resistance between first check point 12 and second check point 13, the resistance of setting first resistance is R1, and the resistance of second resistance is R2.The off-state of switch 11 is set at general state, when the resistance between first check point 12 and second check point 13 is zero, shows short circuit between first check point 12 and second check point 13.When the resistance between first check point 12 and second check point 13 is the resistance value of R1*R2/ (R1+R2), have current in the pipeline 3.When the resistance between first check point 12 and second check point 13 is R1, there are not current in the pipeline 3, need carry out the water cut-off protection operation this moment.When the closure state of switch 11 is set at general normality, when the resistance between first check point 12 and second check point 13 is zero, show short circuit between first check point 12 and second check point 13.When the resistance between first check point 12 and second check point 13 is the resistance value of R1*R2/ (R1+R2), there are not current in the pipeline 3, need carry out the water cut-off protection operation this moment.When the resistance between first check point 12 and second check point 13 is R1, in the pipeline 3 current are arranged.
It is understandable that; When having a plurality of first resistance and a plurality of second resistance; Connecting mode regardless of between a plurality of and first resistance, second resistance does, if satisfy first contact and second contact have that fluid passes through, that no fluid passes through under two different conditions the resistance value between first check point and second check point is unequal.
Target formula fluid detecting device in the present technique scheme at least one first resistance that on said switch, is connected in parallel.Said switch is connected to few one second resistance.Through measuring the state of fluid in the resistance judgement pipeline between first check point and second check point.Unit breaks down when having avoided switch by short circuit.Above-listed detailed description is that this embodiment is not the claim in order to restriction the utility model to the specifying of one of utility model possible embodiments, and does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.
Claims (5)
1. target formula fluid detecting device, it comprises the target bar,
Electric loop with first check point, second check point;
And be connected said first check point in said electric loop, the switch between second check point;
Said target bar one end connects said switch, and the disconnection that drives said switch is with closed, and the other end stretches in the fluid circuit, it is characterized in that,
Said switch in parallel connects at least one first resistance; Simultaneously, said switch said at least one second resistance that is connected in series;
Also include the resistance pick-up unit, said resistance pick-up unit connects said first check point, second check point.
2. target formula fluid detecting device as claimed in claim 1 is characterized in that, the parallel-connection structure of said switch and said at least one first resistance is connected in series in said 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 said switch and said at least one second resistance is connected in parallel in said at least one first resistance jointly.
4. one kind like any described target formula fluid detecting device of claim 1-3, it is characterized in that said electric loop, said switch and said first resistance, 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, said target formula fluid detecting device also comprises target formula switch main body, and said printed circuit board (PCB) is located at said target formula switch main body top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120230981U CN202133443U (en) | 2011-07-01 | 2011-07-01 | Target fluid detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120230981U CN202133443U (en) | 2011-07-01 | 2011-07-01 | Target fluid detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202133443U true CN202133443U (en) | 2012-02-01 |
Family
ID=45522209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120230981U Expired - Lifetime CN202133443U (en) | 2011-07-01 | 2011-07-01 | Target fluid detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202133443U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854227A (en) * | 2011-07-01 | 2013-01-02 | 珠海格力电器股份有限公司 | Detecting device and detecting method of target-type fluid |
| CN110178003A (en) * | 2017-02-23 | 2019-08-27 | 惠普发展公司，有限责任合伙企业 | Fluid level sensor |
-
2011
- 2011-07-01 CN CN201120230981U patent/CN202133443U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854227A (en) * | 2011-07-01 | 2013-01-02 | 珠海格力电器股份有限公司 | Detecting device and detecting method of target-type fluid |
| CN102854227B (en) * | 2011-07-01 | 2014-12-24 | 珠海格力电器股份有限公司 | Detecting device and detecting method of target-type fluid |
| CN110178003A (en) * | 2017-02-23 | 2019-08-27 | 惠普发展公司，有限责任合伙企业 | Fluid level sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120201 Effective date of abandoning: 20141224 |
|
| RGAV | Abandon patent right to avoid regrant |