CN206208344U - A kind of contactless liquid level sensor and the water tank containing the sensor - Google Patents
A kind of contactless liquid level sensor and the water tank containing the sensor Download PDFInfo
- Publication number
- CN206208344U CN206208344U CN201621325201.XU CN201621325201U CN206208344U CN 206208344 U CN206208344 U CN 206208344U CN 201621325201 U CN201621325201 U CN 201621325201U CN 206208344 U CN206208344 U CN 206208344U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- sensor
- base plate
- level sensor
- water tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model is related to a kind of contactless liquid level sensor, the sensor includes the base plate (1) of printed circuit board (PCB) composition and is located at base plate (1) positive capacitance detecting chips (4), wherein, the back side of the base plate (1) is the liquid level induction zone (5) that metallic film is constituted, liquid level induction zone (5) is connected by wire as electric capacity with capacitance detecting chips (4), and the sensor also includes being arranged on the positive mounted terminal (2) being connected with capacitance detecting chips (4) of base plate (1).Contactless liquid level sensor simple structure of the present utility model, controlling water level are easy, are easily installed and connect, and low cost can be widely used in all kinds of water tanks.
Description
【Technical field】
The utility model is related to liquid level sensor, particularly a kind of contactless liquid level sensor, and applies the liquid
The water tank of level sensor.
【Background technology】
Liquid level sensor is divided into two classes：One class is contact, another kind of for contactless.The liquid level of current purifier
Sensor is generally the float type level switch of contact.Generally, float type level switch can include lever and be arranged on the thick stick
Ball float on bar, the liquid level sensor is fixed on the cover plate of liquid container and lever and ball float are respectively positioned on liquid container.
The ball float can fluctuate with the liquid level in liquid container along lever, so as to sense the liquid level in liquid container.It is floating
Ball liquid-level switch is due to positioned at liquid container, it has not been convenient to install, and is also inconvenient to realize connection, and relatively costly.
【Utility model content】
The purpose of this utility model is the defect for overcoming prior art, there is provided a kind of contactless liquid level sensor.Should
Liquid level sensor not with liquid directly contact, controlling water level is easy, is easily installed and connects, and cost is relatively low.
To achieve these goals, the utility model provides a kind of contactless liquid level sensor, the sensor bag
Include the base plate 1 of printed circuit board (PCB) composition and be located at the positive capacitance detecting chips 4 of base plate 1, wherein, the back side of the base plate 1 is
The liquid level induction zone 5 that metallic film is constituted, liquid level induction zone 5 is connected by wire as electric capacity with capacitance detecting chips 4, described
Sensor also includes being arranged on the positive mounted terminal 2 being connected with capacitance detecting chips 4 of base plate 1.
Principle of the present utility model is to be constituted electric capacity with metallic film.When liquid level and metallic film near when (for example across
Relatively thin material), the capacitance of metallic film changes.Capacitance present is obtained by connected capacitance detecting chips 4
Value, determines whether that liquid level is close to metallic film by the change of capacitance, the information is converted into electric signal, by being connected
Mounted terminal 2 export.
In the utility model, the metallic film can be tinfoil paper or aluminium foil.
In the utility model, the mounted terminal can be vertical or horizontal terminal with 2, be that in the market can buy acquisition
Product.
Preferably, the metallic film need not completely be covered in the back side of base plate 1, only need to entirely be located at the back of the body of base plate 1
Face.
Preferably, vertical or horizontal mounted terminal 2 is that have 3 mounted terminals of pin.
Mounted terminal 2 should have master control borad wire harness connection end 3.
The utility model also provides the water tank with above-mentioned contactless liquid level sensor.Preferably, the sensor peace
It is filled at the low water level of water tank, middle water level and/or high water level, the liquid level induction zone 5 of sensor is fitted with the outer surface of water tank.It is logical
Crossing multiple non-contact sensors for being arranged on different liquid levels can obtain general height residing for current level, so as to realize
Level sensing.
When liquid level reaches equivalent water level, the water level induction zone 5 of the sensor being arranged on the outside of water tank influenceed by liquid level and
Change its capacitance, capacitance detecting chips read the capacitance of water level induction zone, upper level device is transferred to by mounted terminal
(such as master control borad).
Compared with prior art, contactless liquid level sensor simple structure of the present utility model, controlling water level are easy, just
In installing and connecting, low cost can be widely used in all kinds of water tanks.
【Brief description of the drawings】
Fig. 1 is the front view of the level sensor of embodiment 1；
Fig. 2 is the left view of the level sensor of embodiment 1；
Fig. 3 is the rearview of the level sensor of embodiment 1；
Fig. 4 is the structural representation of the water tank of embodiment 1
Wherein, 1, base plate；2nd, mounted terminal；3rd, wire harness connection end；4th, capacitance detecting chips；5th, liquid level induction zone；6th, bottom
Back；10th, water tank；20th, sensor.
【Specific embodiment】
Following examples are used to explain the technical solution of the utility model without limitation.
Embodiment 1
Liquid level sensor as Figure 1-3, printed circuit board (PCB) constitutes base plate 1, connected capacitance detecting chips 4 and 3Pin
Mounted vertical terminal 2 is located at base plate front, the liquid level induction zone of the following tinfoil paper metallic film composition of 1/2 height at the base plate back side 6
5, liquid level induction zone 5 is connected by wire as electric capacity with capacitance detecting chips 4.Liquid level induction zone is smooth, solderless point boss.
Sensor is installed in senior middle school's low water level of water tank (such as the inner water-tank of water purifier) shell, wherein liquid level sense
Area 5 is answered to be fitted with tank outer wall.It is connected with the wire harness of water purifier master control borad by the mounted vertical terminals of 3Pin.
For example, being reached when the liquid level in water tank or during more than middle water level, the electricity of the level sensor of middle water level and low water level
Capacitance changes, and is obtained by capacitance detecting chips, and the capacitance of the level sensor of high water level is also in default conditions.It is logical
Three capacitances of sensor of reading are crossed, current level is learnt for middle water level, the signal is transferred to only by mounted vertical terminal
Hydrophone master control borad.
It can be seen that, contactless liquid level sensor simple structure of the present utility model, suitable for all kinds of water tanks.
Claims (7)
1. a kind of contactless liquid level sensor, the sensor includes the base plate (1) and be located at base plate that printed circuit board (PCB) constitutes
(1) positive capacitance detecting chips (4), it is characterised in that the back side of the base plate (1) is the liquid level sensing that metallic film is constituted
Area (5), liquid level induction zone (5) is connected by wire as electric capacity with capacitance detecting chips (4), and the sensor also includes setting
In the positive mounted terminal (2) being connected with capacitance detecting chips (4) of base plate (1).
2. contactless liquid level sensor according to claim 1, it is characterised in that the metallic film is tinfoil paper or aluminium
Paper tinsel.
3. contactless liquid level sensor according to claim 1, it is characterised in that the mounted terminal (2) be it is vertical or
Horizontal terminal.
4. the contactless liquid level sensor according to claim 1 or 3, it is characterised in that mounted terminal (2) is that have 3
The mounted terminal of pin.
5. the contactless liquid level sensor according to claim 1 or 3, it is characterised in that mounted terminal (2) is with master control
Printed line beam connection end (3).
6. there is the water tank of the contactless liquid level sensor according to any one of claim 1-5 claim.
7. water tank according to claim 6, it is characterised in that the sensor is attached to the low water level of water tank, middle water level
And/or at high water level, the liquid level induction zone (5) of sensor is fitted with the outer surface of water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621325201.XU CN206208344U (en) | 2016-12-05 | 2016-12-05 | A kind of contactless liquid level sensor and the water tank containing the sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621325201.XU CN206208344U (en) | 2016-12-05 | 2016-12-05 | A kind of contactless liquid level sensor and the water tank containing the sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206208344U true CN206208344U (en) | 2017-05-31 |
Family
ID=58751732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621325201.XU Active CN206208344U (en) | 2016-12-05 | 2016-12-05 | A kind of contactless liquid level sensor and the water tank containing the sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206208344U (en) |
-
2016
- 2016-12-05 CN CN201621325201.XU patent/CN206208344U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |