CN204924375U - Contact water level alarm device - Google Patents
Contact water level alarm device Download PDFInfo
- Publication number
- CN204924375U CN204924375U CN201520653597.XU CN201520653597U CN204924375U CN 204924375 U CN204924375 U CN 204924375U CN 201520653597 U CN201520653597 U CN 201520653597U CN 204924375 U CN204924375 U CN 204924375U
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- resistance
- pnp triode
- electrode
- relay
- connects
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The utility model provides a contact water level alarm device, includes first electrode, second electrode, first resistance, second resistance, third resistance, a PNP triode, the 2nd PNP triode, relay and buzzer. The one end of first resistance, the collecting electrode of a PNP triode, the collecting electrode of the 2nd PNP triode and the one end ground connection of buzzer, the first electrode is connected to the other end of first resistance, the second electrode is connected to the one end of second resistance, the base of a PNP triode is connected to the other end of second resistance, the one end of third resistance and the base of the 2nd PNP triode are connected to the projecting pole of a PNP triode, the one end of the coil of the other end connection relay of third resistance and a normally closed contact of relay receive mains voltage, the other end of the coil of relay is connected to the projecting pole of the 2nd PNP triode, another normally closed contact of relay connects the other end of buzzer. The utility model provides a contact water level alarm device to the low cost has realized the low water level monitoring.
Description
Technical field
The utility model relates to water level detecting technical field, particularly a kind of contact level alarm for water.
Background technology
Condensing tower (Thecoolingtower) uses water as circulating coolant, absorbs heat dissipation in air from a system, to reduce the device of water temperature.It carries out cold and hot exchange after utilizing water and air to flow to contact and produces steam, steam volatile zone is walked heat and is reached waste heat that the principles such as evaporative heat loss, convection heat transfer' heat-transfer by convection and radiant heat transfer produce in leave industrial or refrigeration air-conditioner to reduce the evaporating radiator of water temperature, to ensure the normal operation of system.The water level of condensing tower inside must remain on normal height, especially can not occur the phenomenon of lack of water, thus must carry out monitoring instruction to condensing tower cistern water level.
Along with developing rapidly of computer technology and modern communication technology, water level indicating device develops into intellectuality from plain edition, and the function of water level indicating device trends towards perfect day by day.Water level indicating device is studied, is conducive to meeting the growing material requisite of people, by science and technology being applied on water lev el control thus the convenience brought to the actual life of oneself of the development making people really realize science and technology and comfortable.Existing water level indicating device is made up of detector, Signal transmissions part and alarm controller usually, by detector, water level information is become electronic signal and outwards transmission, by wireless transmission, detector is connected with wireless launcher, once there is alert, will to sending radio signal in the air.Wireless receiver receives signal and produces warning, and the personnel of notice process.But its System's composition of existing water level indicating device is complicated, and cost is higher.
Utility model content
The utility model will be dealt with problems and is to provide a kind of contact level alarm for water of low cost, gives the alarm when water level is too low, prevents water tank from occurring the situation of lack of water.
For solving the problem, the utility model provides a kind of contact level alarm for water, comprises the first electrode, the second electrode, the first resistance, the second resistance, the 3rd resistance, the first PNP triode, the second PNP triode, relay and hummer, one end of described first resistance, the collector of described first PNP triode, the collector of described second PNP triode and one end ground connection of described hummer, the other end of described first resistance connects described first electrode, one end of described second resistance connects described second electrode, the other end of described second resistance connects the base stage of described first PNP triode, the emitter of described first PNP triode connects one end of described 3rd resistance and the base stage of described second PNP triode, the other end of described 3rd resistance connects one end of the coil of described relay and a normally closed contact of described relay and is suitable for receiving supply voltage, the emitter of described second PNP triode connects the other end of the coil of described relay, another normally closed contact of described relay connects the other end of described hummer.
Optionally, described contact level alarm for water also comprises fly-wheel diode, and described fly-wheel diode is connected in parallel on the coil two ends of described relay.By arranging described fly-wheel diode, can prevent the coil of described relay from conduction state switch to off-position energy have little time consume and damage other circuit components, improve the reliability of whole device.
Optionally, described contact level alarm for water also comprises the 4th resistance and light emitting diode, one end of described 4th resistance connects the other end of described hummer, and the other end of described 4th resistance connects the anode of described light emitting diode, the plus earth of described light emitting diode.By arranging described 4th resistance and light emitting diode, realize the same alarm of acousto-optic.
Optionally, described first electrode and described second electrode are stainless steel electrode.
Compared with prior art, the utility model has the following advantages:
The contact level alarm for water that the utility model provides, when Water in Water Tanks position is normal, conduct electricity between described first electrode and described second electrode, make described first PNP triode conducting, described second PNP triode conducting, there is electric current through the coil of described relay, the normally closed contact of described relay disconnects, and hummer does not work; When cistern water level is too low, insulate between described first electrode and described second electrode, make described first PNP triode cut-off, described second PNP triode cut-off, no current is through the coil of described relay, the normally closed contact of described relay closes, hummer sounding alarm.The utility model achieves water tank low-water level by simple circuit component and detects, and the cost of whole device is very low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the contact level alarm for water of a kind of embodiment of the utility model;
Fig. 2 is the structural representation of the contact level alarm for water of the another kind of embodiment of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but embodiment of the present utility model is not limited thereto.
Fig. 1 is the structural representation of the contact level alarm for water of a kind of embodiment of the utility model, and described contact level alarm for water comprises the first electrode E1, the second electrode E2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the first PNP triode Q1, the second PNP triode Q2, relay 11 and hummer B1.In the present embodiment, described first electrode E1 and described second electrode E2 can be stainless steel electrode, two stainless steel electrodes is separated by about 15mm and is firmly arranged on plastic plate, more just can at the correct position fixed plastics plate of water tank according to the actual requirements.
Particularly, one end of described first resistance R1, the collector of described first PNP triode Q1, the collector of described second PNP triode Q2 and one end ground connection of described hummer B1, the other end of described first resistance R1 connects described first electrode E1, one end of described second resistance R2 connects described second electrode E2, the other end of described second resistance R2 connects the base stage of described first PNP triode Q1, the emitter of described first PNP triode Q1 connects one end of described 3rd resistance R3 and the base stage of described second PNP triode Q2, the other end of described 3rd resistance R3 connects one end of the coil of described relay 11 and a normally closed contact of described relay 11 and is suitable for receiving supply voltage VCC, the emitter of described second PNP triode Q2 connects the other end of the coil of described relay 11, another normally closed contact of described relay 11 connects the B1 other end of described hummer.
When cistern water level is normal, described first electrode E1 and described second electrode E2 conduction under water, the base potential of described first PNP triode Q1 is dragged down, make described first PNP triode Q1 conducting, the base potential of described second PNP triode Q2 drags down by described first PNP triode Q1 conducting, makes described second PNP triode Q2 conducting, has electric current through the coil of described relay 11, the normally closed contact of described relay 11 disconnects, and described hummer B1 does not work; When cistern water level is too low, insulate between described first electrode E1 and described second electrode E2, make described first PNP triode Q1 cut-off, supply voltage VCC is through the base stage of described 3rd resistance R3 to described second PNP triode Q2, make described second PNP triode Q2 cut-off, no current is through the coil of described relay 11, and the normally closed contact of described relay 11 closes, and triggers described hummer B1 sounding alarm.
In the present embodiment, described contact level alarm for water also comprises sustained diode 1, and described sustained diode 1 is connected in parallel on the coil two ends of described relay 11.When described second PNP triode Q2 is switched to cut-off state by conducting state, the conducting of described sustained diode 1 consumes the energy stored in described relay 11 coil, prevent the energy because storing in described relay 11 coil from having little time consume and damage other circuit components, to improve the reliability of whole device.
Fig. 2 is the structural representation of the contact level alarm for water of the another kind of embodiment of the utility model.Compared with the embodiment that Fig. 1 is corresponding, the contact level alarm for water of the present embodiment also comprises the 4th resistance R4 and light emitting diode D2.One end of described 4th resistance R4 connects the B1 other end of hummer, and the other end of described 4th resistance R4 connects the anode of described light emitting diode D2, the plus earth of described light emitting diode D2.By arranging described 4th resistance R4 and described light emitting diode D2, realize the same alarm of acousto-optic.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present utility model, all falls within protection domain of the present utility model.
Claims (4)
1. a contact level alarm for water, is characterized in that, comprises the first electrode, the second electrode, the first resistance, the second resistance, the 3rd resistance, the first PNP triode, the second PNP triode, relay and hummer;
One end of described first resistance, the collector of described first PNP triode, the collector of described second PNP triode and one end ground connection of described hummer, the other end of described first resistance connects described first electrode, one end of described second resistance connects described second electrode, the other end of described second resistance connects the base stage of described first PNP triode, the emitter of described first PNP triode connects one end of described 3rd resistance and the base stage of described second PNP triode, the other end of described 3rd resistance connects one end of the coil of described relay and a normally closed contact of described relay and is suitable for receiving supply voltage, the emitter of described second PNP triode connects the other end of the coil of described relay, another normally closed contact of described relay connects the other end of described hummer.
2. contact level alarm for water according to claim 1, is characterized in that, also comprise fly-wheel diode, and described fly-wheel diode is connected in parallel on the coil two ends of described relay.
3. contact level alarm for water according to claim 1, it is characterized in that, also comprise the 4th resistance and light emitting diode, one end of described 4th resistance connects the other end of described hummer, the other end of described 4th resistance connects the anode of described light emitting diode, the plus earth of described light emitting diode.
4. contact level alarm for water according to claim 1, is characterized in that, described first electrode and described second electrode are stainless steel electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520653597.XU CN204924375U (en) | 2015-08-27 | 2015-08-27 | Contact water level alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520653597.XU CN204924375U (en) | 2015-08-27 | 2015-08-27 | Contact water level alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204924375U true CN204924375U (en) | 2015-12-30 |
Family
ID=54973491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520653597.XU Expired - Fee Related CN204924375U (en) | 2015-08-27 | 2015-08-27 | Contact water level alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204924375U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043499A (en) * | 2015-08-27 | 2015-11-11 | 成都众山科技有限公司 | Water box liquid level monitoring circuit |
| CN106441501A (en) * | 2016-09-05 | 2017-02-22 | 海尔优家智能科技（北京）有限公司 | Water fullness detection circuit |
| CN109572548A (en) * | 2018-12-07 | 2019-04-05 | 柳州铁道职业技术学院 | Automobile wading sensor |
-
2015
- 2015-08-27 CN CN201520653597.XU patent/CN204924375U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043499A (en) * | 2015-08-27 | 2015-11-11 | 成都众山科技有限公司 | Water box liquid level monitoring circuit |
| CN106441501A (en) * | 2016-09-05 | 2017-02-22 | 海尔优家智能科技（北京）有限公司 | Water fullness detection circuit |
| CN109572548A (en) * | 2018-12-07 | 2019-04-05 | 柳州铁道职业技术学院 | Automobile wading sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20170827 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |