CN113048631A - Water level detection circuit and electronic equipment - Google Patents
Water level detection circuit and electronic equipment Download PDFInfo
- Publication number
- CN113048631A CN113048631A CN202110336153.3A CN202110336153A CN113048631A CN 113048631 A CN113048631 A CN 113048631A CN 202110336153 A CN202110336153 A CN 202110336153A CN 113048631 A CN113048631 A CN 113048631A
- Authority
- CN
- China
- Prior art keywords
- electrode
- signal
- water level
- electrically connected
- mcu
- 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.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention provides a water level detection circuit and electronic equipment, and relates to the technical field of water level detection. The water level detection circuit comprises an MCU, a signal detection unit, a signal transmission unit and an alarm unit, wherein the signal detection unit, the signal transmission unit, the MCU and the alarm unit are electrically connected in sequence, the signal detection unit comprises a first electrode and a second electrode, a distance is arranged between the first electrode and the second electrode, wherein when the water level does not submerge the first electrode and the second electrode simultaneously, the signal detection unit transmits a first signal to the MCU through the signal transmission unit, when the water level submerges the first electrode and the second electrode simultaneously, the signal detection unit transmits a second signal to the MCU through the signal transmission unit, and when the MCU receives the second signal, the MCU controls the alarm unit to alarm. The water level detection circuit and the electronic equipment provided by the invention have the advantages of capability of realizing water level detection and lower cost.
Description
Technical Field
The invention relates to the technical field of water level detection, in particular to a water level detection circuit and electronic equipment.
Background
The working environment of an air conditioner outdoor unit is generally severe, particularly, the air conditioner outdoor unit is frequently used in summer due to heavy rain and typhoon in southern areas, if the outdoor unit is arranged on a roof platform, a semi-closed balcony and the like, once water is drained and the outdoor unit is easy to soak, and if the water level exceeds a certain height, the compressor, a plug-in terminal and even part of electronic elements are damaged, so that property loss is caused.
At present, in an air conditioner outdoor unit, a circuit for detecting water level is not arranged, or a related sensor is directly adopted for arrangement, so that the cost is high.
In summary, in the prior art, a detection circuit for an air conditioner external unit is not provided, which may cause the air conditioner external unit to be damaged by soaking water, or a related sensor is provided for detection, but the detection cost is high.
Disclosure of Invention
An object of this application is to provide a water level detection circuit and electronic equipment to solve and not set up the detection circuitry to the outer machine of air conditioner among the prior art, lead to the outer machine of air conditioner probably to bubble water and damage, perhaps set up relevant sensor and detect, nevertheless detect the higher problem of cost.
In order to solve the above problem, in one aspect, the present application provides a water level detection circuit, which includes an MCU, a signal detection unit, a signal transmission unit, and an alarm unit, wherein the signal detection unit, the signal transmission unit, the MCU, and the alarm unit are electrically connected in sequence, the signal detection unit includes a first electrode and a second electrode, and the first electrode and the second electrode are arranged at a distance, wherein,
when the first electrode and the second electrode are not submerged by water level at the same time, the signal detection unit transmits a first signal to the MCU through the signal transmission unit;
when the water level submerges the first electrode and the second electrode at the same time, the signal detection unit transmits a second signal to the MCU through the signal transmission unit;
and when the MCU receives the second signal, the MCU controls the alarm unit to alarm.
Because this application has set up signal detection unit, and including first electrode and second electrode in the signal detection unit, have the principle of electric conductivity through the rainwater, when ponding submerges first electrode and second electrode simultaneously, switch on between first electrode and the second electrode, consequently, only need set up first electrode in predetermineeing the height, can realize the detection of water level, avoid ponding. Meanwhile, devices such as a sensor and the like are not required to be utilized, so that the cost is effectively reduced.
Optionally, the signal detection unit includes a switch tube assembly, a driving power supply and a driving resistor, a first end of the switch tube assembly is electrically connected to the driving power supply and one end of the driving resistor, a second end of the switch tube assembly is electrically connected to the first electrode and the other end of the driving resistor, a third end of the switch tube assembly is grounded, the switch tube assembly is further electrically connected to the signal transmission unit, and the second electrode plate is grounded; wherein the content of the first and second substances,
when the first electrode and the second electrode are not simultaneously submerged by water level, the switching tube assembly is conducted so as to transmit a first signal to the MCU through the signal transmission unit;
when the water level submerges the first electrode and the second electrode at the same time, the switching tube assembly is cut off so as to transmit a second signal to the MCU through the signal transmission unit.
Optionally, the switching tube assembly includes a first triode and a second triode, a collector of the first triode is electrically connected to the driving power supply and the driving resistor, a base of the first triode is electrically connected to the first electrode and the driving resistor, an emitter of the first triode is electrically connected to an emitter of the second triode and the signal transmission unit, a base of the second triode is also electrically connected to the first electrode and the driving resistor, and a collector of the second triode is grounded; when the first electrode and the second electrode are not simultaneously submerged by water level, the first triode is conducted, the second triode is cut off, and a first signal is transmitted to the MCU through the signal transmission unit;
when the water level submerges the first electrode and the second electrode at the same time, the first triode is cut off so as to transmit a second signal to the MCU through the signal transmission unit.
Optionally, the signal detection unit further includes a capacitor, one end of the capacitor is grounded, and the other end of the capacitor is electrically connected to the second end of the switching tube assembly.
Optionally, the signal transmission unit includes an optocoupler, a transmission circuit and a driving power supply, the optocoupler is electrically connected with the signal detection unit and the transmission circuit respectively, the transmission circuit is electrically connected with the driving power supply and the MCU, and the transmission circuit is grounded;
the optical coupler is used for receiving the signal of the signal detection unit and transmitting the processed signal to the MCU through the transmission circuit.
Optionally, the signal transmission unit further includes a first resistor, the optocoupler includes a light emitting diode and a light receiving triode, the first resistor is connected in series with the light emitting diode and then electrically connected to the signal detection unit, and the light receiving triode is electrically connected to the transmission circuit.
Optionally, the transmission circuit includes a second resistor, a third resistor and a fourth resistor, one end of the second resistor is electrically connected to the driving power supply, the other end of the second resistor is respectively electrically connected to the optocoupler and one end of the third resistor, the other end of the third resistor is electrically connected to the MCU, one end of the fourth resistor is electrically connected to the optocoupler, and the other end of the fourth resistor is grounded.
Optionally, the water level detection circuit further comprises a power switch, and the power switch is electrically connected with the MCU;
and when the MCU receives a second signal, the MCU controls the power switch to be switched off.
Optionally, the spacing between the first electrode and the second electrode is less than 10 mm.
On the other hand, the application also provides electronic equipment which comprises the water level detection circuit.
Drawings
Fig. 1 is a schematic block diagram of a water level detection circuit according to an embodiment of the present disclosure.
Fig. 2 is a schematic block diagram of a signal detection unit according to an embodiment of the present disclosure.
Fig. 3 is a schematic circuit diagram of a water level detection circuit according to an embodiment of the present application.
Description of reference numerals:
100-a water level detection circuit; 110-a signal detection unit; 120-a signal transmission unit; 130-MCU; 140-an alarm unit; 150-power switch; 111-a switching tube assembly; 112-drive resistance; 113-a drive power supply; 114-a first electrode; 115-a second electrode; rx-equivalent resistance; q1-first triode; q2-second transistor; o1-optocoupler; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; c1 — first capacitance; c2-second capacitance.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As described in the beijing technology, the outdoor unit of the air conditioner is prone to water accumulation due to the environment and other reasons, and once water accumulation occurs, part of electronic components in the outdoor unit of the air conditioner may be damaged, and finally, the outdoor unit of the air conditioner may fail.
However, at present, in the air conditioner outdoor unit, a circuit for detecting the water level is not provided, or a related sensor, such as a liquid level sensor, is directly provided, but the price of the liquid level sensor is high, which may cause the overall cost of the air conditioner to increase.
In view of this, in order to solve the above problems, the present application provides a water level detection circuit, which detects a water level in a circuit manner, and alarms when the water level reaches a certain height, thereby avoiding detection in a sensor manner, and saving cost.
The following is an exemplary description of the water level detection circuit provided in the present application:
as an implementation manner, referring to fig. 1, the water level detection circuit 100 includes an MCU130(Microcontroller Unit), a signal detection Unit 110, a signal transmission Unit 120, and an alarm Unit 140, wherein the signal detection Unit 110, the signal transmission Unit 120, the MCU130, and the alarm Unit 140 are electrically connected in sequence, the signal detection Unit 110 includes a first electrode 114 and a second electrode 115, and the first electrode 114 and the second electrode 115 are disposed at a distance, wherein when the water level does not submerge the first electrode 114 and the second electrode 115 at the same time, the signal detection Unit 110 transmits a first signal to the MCU130 through the signal transmission Unit 120; when the water level submerges the first electrode 114 and the second electrode 115 at the same time, the signal detection unit 110 transmits a second signal to the MCU130 through the signal transmission unit 120. And when the MCU130 receives the second signal, the MCU130 controls the alarm unit 140 to alarm.
In order to detect whether water is accumulated, the first electrode 114 may be located at a preset height, where the preset height is an alarm water level line, for example, the first electrode 114 is disposed in a cavity of an external machine compressor and is located at a position H away from a chassis. This height H can be adjusted according to actual conditions to when guaranteeing that the water level of ponding is less than height H, the outer machine of air conditioner can not damage.
Optionally, as an implementation manner, the second electrode 115 and the first electrode 114 have a certain height difference in the horizontal direction, and the second electrode 115 is lower than the first electrode 114. When the outdoor unit is soaked with water, the water level in the compressor cavity rises, at this time, the water level firstly submerges the second electrode 115, however, the water level does not submerge the first electrode 114, which indicates that the normal operation of the outdoor unit of the air conditioner is not affected although the accumulated water exists at this time, and at this time, the alarm is not given. When the water level gradually rises until the first electrode 114 is submerged, the first electrode 114 and the second electrode 115 are simultaneously submerged by the accumulated water, and the non-pure water has conductivity and the accumulated water is non-pure water, so that the first electrode 114 and the second electrode 115 are conducted at this time, and the signal detection unit 110 transmits the second signal to the MCU130 through the signal transmission unit 120.
As another implementation, the first electrode 114 is at the same level as the second electrode 115. When the water level submerges the first electrode 114 and the second electrode 115 at the same time, the signal detection unit 110 transmits the second signal to the MCU130 through the signal transmission unit 120, and the working principle is the same as the above implementation, which is not described herein again.
When the MCU130 receives the second signal, the alarm unit 140 may be controlled to alarm, thereby reminding the user to check the state of the outdoor unit, and preventing the outdoor unit of the air conditioner from being damaged due to further rising of the water level.
It can be understood that, the water level detection circuit 100 provided in the present application is provided with the signal detection unit 110, and the signal detection unit 110 includes the first electrode 114 and the second electrode 115, so that the detection of the accumulated water level can be realized through the first electrode 114 and the second electrode 115. And adopt the mode of circuit to realize the detection of ponding water level in this application, and need not to increase devices such as sensor, therefore the cost can be controlled.
As an implementation manner, please refer to fig. 2, the signal detecting unit 110 includes a switching tube assembly 111, a driving power source 113 and a driving resistor 112, a first end of the switching tube assembly 111 is electrically connected to one end of the driving power source 113 and one end of the driving resistor 112, a second end of the switching tube assembly 111 is electrically connected to the other end of the first electrode 114 and the other end of the driving resistor 112, a third end of the switching tube assembly 111 is grounded, the switching tube assembly 111 is further electrically connected to the signal transmitting unit 120, and the second electrode 115 is grounded; when the water level does not submerge the first electrode 114 and the second electrode 115 at the same time, the switching tube assembly 111 is turned on to transmit a first signal to the MCU130 through the signal transmission unit 120; when the water level submerges the first electrode 114 and the second electrode 115 at the same time, the switching tube assembly 111 is turned off to transmit the second signal to the MCU130 through the signal transmission unit 120.
By providing the switching tube assembly 111, when the water level submerges the first electrode 114 at the same time and the water level does not submerge the electrodes at the same time, the signals transmitted to the MCU130 through the signal transmission unit 120 are not uniform, thereby achieving the detection of the water level. Meanwhile, the signal detection unit 110 is implemented only by simple devices such as the switching tube assembly 111, the driving power source 113, and the driving resistor 112, and thus the cost thereof is controlled.
The driving power source 113 provided in the present application supplies power with weak current, and for example, the voltage of the driving power source 113 is 3.3V.
On the basis, referring to fig. 3, optionally, the switching tube assembly 111 includes a first transistor Q1 and a second transistor Q2, a collector of the first transistor Q1 is electrically connected to the driving power source 113 and the driving resistor 112, respectively, a base of the first transistor is electrically connected to the first electrode 114 and the driving resistor 112, respectively, an emitter of the first transistor Q1 is electrically connected to an emitter of the second transistor Q2 and the signal transmission unit 120, respectively, a base of the second transistor is also electrically connected to the first electrode 114 and the driving resistor 112, respectively, and a collector of the second transistor Q2 is grounded. When the water level does not submerge the first electrode 114 and the second electrode 115 at the same time, the first transistor Q1 is turned on, the second transistor Q2 is turned off to transmit the first signal to the MCU130 through the signal transmission unit 120, and when the water level submerges the first electrode 114 and the second electrode 115 at the same time, the first transistor Q1 is turned off to transmit the second signal to the MCU130 through the signal transmission unit 120.
As shown in fig. 3, a represents the first electrode 114, B represents the second electrode 115, and for convenience of description, an equivalent resistor Rx is present between the first electrode 114 and the second electrode 115, and the resistance of the equivalent resistor Rx is variable. Meanwhile, an intersection of the first electrode 114, the driving resistor 112, the first transistor Q1, and the second transistor Q2 is named as a midpoint Va, an intersection between an emitter of the first transistor Q1 and an emitter of the second transistor Q2 is named as a midpoint Vb, and the midpoint Vb is electrically connected to the signal transmission unit 120.
On this basis, the working principle of the signal detection unit 110 is as follows:
in the case where water is not accumulated normally, the first electrode 114 and the second electrode 115 are blocked by air, and the resistance Rx of the equivalent resistor Rx is ∞, Va is Vcc at this time, and Va is high. At this time, the first transistor Q1 is turned on, the second transistor Q2 is turned off, and Vb is at a high level, so that the signal transmission unit 120 receives a high level signal.
When the water accumulation condition occurs and the height of the water accumulation reaches the preset height, the water level simultaneously submerges the first electrode 114 and the second electrode 115, the resistance value of the equivalent resistor Rx is no longer infinite, and the circuit is conducted due to the ion motion between the first electrode 114 and the second electrode 115, Va is Rx Vcc/(R1+ Rx), and Va becomes low level. On this basis, the first transistor Q1 is turned off, Vb is at low level, and therefore the signal transmission unit 120 receives a low level signal. Therefore, the effect that when the accumulated water reaches the preset height and does not reach the preset height, the signals received by the signal transmission unit 120 are different is achieved.
It should be noted that, when water is not accumulated, the first triode Q1 is turned on, the second triode Q2 is turned off, and the bases of the first triode Q1 and the second triode Q2 are both connected to the point Va, so that the first triode Q1 and the second triode Q2 need to be different triodes, in this application, the first triode Q1 is an NPN-type triode, and the second triode Q2 is a PNP-type triode.
In addition, in order to achieve the filtering effect, the signal detecting unit 110 provided by the present application further includes a first capacitor C1, one end of the first capacitor C1 is grounded, and the other end of the first capacitor C1 is electrically connected to the second end of the switching tube assembly 111. That is, one end of the first capacitor C1 is grounded, and the other end is connected to the point Va, so as to achieve the filtering effect on the driving power source 113.
Of course, in other embodiments, other signal detecting units 110 may be used, for example, a water level switch may be used instead of the detecting electrode.
As an implementation manner, the signal transmission unit 120 includes an optical coupler O1, a transmission circuit and a driving power source 113, the optical coupler O1 is electrically connected to the signal detection unit 110 and the transmission circuit respectively, the transmission circuit is electrically connected to the driving power source 113 respectively, and the transmission circuit is grounded; the optical coupler O1 is used for receiving the signal of the signal detection unit 110 and transmitting the processed signal to the MCU130 through a transmission circuit.
Through the mode that sets up opto-coupler O1, realized utilizing opto-coupler O1 to keep apart the transmission sampling signal, the security is higher.
Optionally, the signal transmission unit 120 further includes a first resistor R1, the optocoupler O1 includes a light emitting diode and a light receiving transistor, the first resistor R1 is electrically connected to the signal detection unit 110 after being connected in series with the light emitting diode, and the light receiving transistor is electrically connected to the transmission circuit.
The transmission circuit comprises a second resistor R2, a third resistor R3 and a fourth resistor R4, one end of the second resistor R2 is electrically connected with the driving power supply 113, the other end of the second resistor R2 is electrically connected with one end of a third resistor R3 of the optical coupler O1 respectively, the other end of the third resistor R3 is electrically connected with the MCU130, one end of the fourth resistor R4 is electrically connected with the optical coupler O1, and the other end of the fourth resistor R4 is grounded. In an alternative embodiment, in order to filter the driving power, the transmission circuit further includes a second capacitor C2, one end of the second capacitor C2 is electrically connected to the MCU and the third resistor R3, respectively, and the other end of the second capacitor C2 is grounded.
Based on the circuit of the signal detection unit 110, the circuit structure provided by the present application is:
the anode of the light emitting diode is electrically connected with the midpoint Vb, the cathode of the light emitting diode is electrically connected with one end of the first resistor R1, and the other end of the first resistor R1 is grounded. The collector of the light receiving triode is respectively and electrically connected with the second resistor R2 and the third resistor R3, the emitter of the light receiving triode is connected with one end of the fourth resistor R4, and the other end of the fourth resistor R4 is grounded.
The working principle of the signal transmission unit 120 is as follows:
when the water level does not submerge the first electrode 114 and the second electrode 115 at the same time, the point Vb is at a high level, the light emitting diode of the optocoupler O1 is turned on to emit light, the light receiving triode is turned on accordingly, the voltage of the midpoint Vc in the figure is approximately equal to R4 × Vcc/(R3+ R4), the voltage of Vc is pulled low, and the MCU130 receives the low level to judge that there is no bubble water (accumulated water). In other words, the first signal is a low level signal.
When the water level submerges the first electrode 114 and the second electrode 115 at the same time, the point Vb is a low level, the optocoupler O1 is not conducted, Vc is Vcc, and the MCU130 receives a high level to determine that the external unit is immersed in water. The second signal described herein is a high level signal.
Of course, in other embodiments, the signal transmission unit 120 may also be directly driven by a triode type driving method instead of using the optical coupler O1 for isolation, which is not limited herein.
In addition, in order to protect the safety of the air conditioner external unit, the water level detection circuit 100 further includes a power switch 150, and the power switch 150 is electrically connected to the MCU 130; when the MCU130 receives the second signal, the MCU130 controls the power switch 150 to be turned off. When the ponding situation occurs, the power supply of the external unit is effectively disconnected, and the safety is further guaranteed.
As an implementation manner, the MCU130 may detect the water level at intervals of T, when the water level is lower than the alarm water level, the first electrode 114 and the second electrode 115 cannot be conducted, Va is high, and when the MCU130 receives low level, the MCU130 may further control the power switch 150 to be turned on, so as to restore the normal operation of the whole machine. Optionally, the power switch 150 provided herein is a relay, and the MCU130 is utilized to control the opening and closing of the relay.
Optionally, the alarm unit 140 includes a display lamp panel and/or a buzzer, and when the MCU130 receives the second signal, the MCU130 controls the display lamp panel to light up and/or the buzzer to alarm. For example, the alarm unit 140 may only include a display lamp panel and alarm by lighting; alternatively, the alarm unit 140 may include only a buzzer, which may alarm by sounding a buzzer; or, the alarm unit 140 may include a display lamp panel and a buzzer, and when an alarm needs to be given, the display lamp panel may be controlled to be turned on, and the buzzer may be controlled to sound.
Based on the foregoing implementation manner, an embodiment of the present application further provides an electronic device, which includes the above water level detection circuit 100. Optionally, the electronic device may be an air conditioner.
To sum up, the application provides a water level detection circuit and electronic equipment, this water level detection circuit includes MCU, signal detection unit, signal transmission unit and alarm unit, signal detection unit, signal transmission unit, MCU and alarm unit electricity are connected in proper order, signal detection unit includes first electrode and second electrode, be the distance setting between first electrode and the second electrode, wherein, when the water level does not submerge first electrode and second electrode simultaneously, signal detection unit passes through signal transmission unit and transmits first signal to MCU, when the water level submerges first electrode and second electrode simultaneously, signal detection unit passes through signal transmission unit and transmits the second signal to MCU, when MCU received the second signal, MCU control alarm unit reports to the police. Because this application has set up signal detection unit, and including first electrode and second electrode in the signal detection unit, have the principle of electric conductivity through the rainwater, when ponding submerges first electrode and second electrode simultaneously, switch on between first electrode and the second electrode, consequently, only need set up first electrode in predetermineeing the height, can realize the detection of water level, avoid ponding. Meanwhile, devices such as a sensor and the like are not required to be utilized, so that the cost is effectively reduced.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The water level detection circuit is characterized in that the water level detection circuit (100) comprises an MCU (130), a signal detection unit (110), a signal transmission unit (120) and an alarm unit (140), the signal detection unit (110), the signal transmission unit (120), the MCU (130) and the alarm unit (140) are electrically connected in sequence, the signal detection unit (110) comprises a first electrode (114) and a second electrode (115), the first electrode (114) and the second electrode (115) are arranged at a distance, wherein,
when the water level does not submerge the first electrode (114) and the second electrode (115) at the same time, the signal detection unit (110) transmits a first signal to the MCU (130) through the signal transmission unit (120);
when the water level submerges the first electrode (114) and the second electrode (115) at the same time, the signal detection unit (110) transmits a second signal to the MCU (130) through the signal transmission unit (120);
when the MCU (130) receives the second signal, the MCU (130) controls the alarm unit (140) to alarm.
2. The water level detection circuit according to claim 1, wherein the signal detection unit (110) comprises a switch tube assembly (111), a driving power source (113) and a driving resistor (112), a first end of the switch tube assembly (111) is electrically connected with the driving power source (113) and one end of the driving resistor (112), a second end of the switch tube assembly (111) is electrically connected with the first electrode (114) and the other end of the driving resistor (112), a third end of the switch tube assembly (111) is grounded, the switch tube assembly (111) is further electrically connected with the signal transmission unit (120), and the second electrode (115) is grounded; wherein the content of the first and second substances,
when the water level does not submerge the first electrode (114) and the second electrode (115) at the same time, the switching tube assembly (111) is conducted to transmit a first signal to the MCU (130) through the signal transmission unit (120);
when the water level submerges the first electrode (114) and the second electrode (115) at the same time, the switching tube assembly (111) is turned off to transmit a second signal to the MCU (130) through the signal transmission unit (120).
3. The water level detecting circuit according to claim 2, wherein the switching tube assembly (111) comprises a first transistor (Q1) and a second transistor (Q2), wherein a collector of the first transistor (Q1) is electrically connected to the driving power source (113) and the driving resistor (112), respectively, a base of the first transistor (Q1) is electrically connected to the first electrode (114) and the driving resistor (112), respectively, an emitter of the first transistor (Q1) is electrically connected to an emitter of the second transistor (Q2) and the signal transmission unit (120), respectively, a base of the second transistor is also electrically connected to the first electrode (114) and the driving resistor (112), respectively, and a collector of the second transistor (Q2) is grounded; wherein the content of the first and second substances,
when the water level does not submerge the first electrode (114) and the second electrode (115) at the same time, the first triode (Q1) is turned on, and the second triode (Q2) is turned off, so as to transmit a first signal to the MCU (130) through the signal transmission unit (120);
when the water level submerges the first electrode (114) and the second electrode (115) at the same time, the first triode (Q1) is turned off to transmit a second signal to the MCU (130) through the signal transmission unit (120).
4. The water level detection circuit according to claim 2, wherein the signal detection unit (110) further comprises a capacitor, one end of the capacitor is grounded, and the other end of the capacitor is electrically connected with the second end of the switch tube assembly (111).
5. The water level detection circuit according to claim 1, wherein the signal transmission unit (120) comprises an optical coupler (O1), a transmission circuit and a driving power supply (113), the optical coupler (O1) is electrically connected with the signal detection unit (110) and the transmission circuit respectively, the transmission circuit is electrically connected with the driving power supply (113) and the MCU (130) respectively, and the transmission circuit is grounded;
the optical coupler (O1) is used for receiving the signal of the signal detection unit (110) and transmitting the processed signal to the MCU (130) through the transmission circuit.
6. The water level detecting circuit according to claim 5, wherein the signal transmitting unit (120) further comprises a first resistor (R1), the optical coupler (O1) comprises a light emitting diode and a light receiving transistor, the first resistor (R1) is connected in series with the light emitting diode and then electrically connected with the signal detecting unit (110), and the light receiving transistor is electrically connected with the transmitting circuit.
7. The water level detecting circuit according to claim 5, wherein the transmission circuit comprises a second resistor (R2), a third resistor (R3) and a fourth resistor (R4), one end of the second resistor (R2) is electrically connected with the driving power supply (113), the other end of the second resistor (R2) is electrically connected with one end of the optical coupler (O1) and one end of the third resistor (R3), the other end of the third resistor (R3) is electrically connected with the MCU (130), one end of the fourth resistor (R4) is electrically connected with the optical coupler (O1), and the other end of the fourth resistor (R4) is grounded.
8. The water level detection circuit according to claim 1, wherein the water level detection circuit (100) further comprises a power switch (150), the power switch (150) being electrically connected with the MCU (130);
when the MCU (130) receives a second signal, the MCU (130) controls the power switch (150) to be switched off.
9. The water level detection circuit according to claim 1, wherein a spacing between the first electrode (114) and the second electrode (115) is less than 10 mm.
10. An electronic device, characterized in that it comprises a water level detection circuit (100) according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336153.3A CN113048631A (en) | 2021-03-29 | 2021-03-29 | Water level detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336153.3A CN113048631A (en) | 2021-03-29 | 2021-03-29 | Water level detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113048631A true CN113048631A (en) | 2021-06-29 |
Family
ID=76516100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110336153.3A Withdrawn CN113048631A (en) | 2021-03-29 | 2021-03-29 | Water level detection circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113048631A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220251A (en) * | 2021-12-23 | 2022-03-22 | 西安芯海微电子科技有限公司 | Water level monitoring and early warning circuit and method and electronic equipment |
| CN114878198A (en) * | 2022-06-06 | 2022-08-09 | 珠海格力电器股份有限公司 | Fault detection circuit and method and air conditioning equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205483168U (en) * | 2015-12-18 | 2016-08-17 | 浙江苏泊尔家电制造有限公司 | Water level detection circuit and electric rice cooker |
| CN110160597A (en) * | 2019-06-11 | 2019-08-23 | 宁波市机电工业研究设计院有限公司 | A kind of water level detection circuit based on positive and negative symmetrical square wave direct current |
| CN210663244U (en) * | 2019-10-12 | 2020-06-02 | 宁波奥克斯电气股份有限公司 | Outer quick-witted chassis warning device and outer machine of air conditioner of intaking of air conditioner |
-
2021
- 2021-03-29 CN CN202110336153.3A patent/CN113048631A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205483168U (en) * | 2015-12-18 | 2016-08-17 | 浙江苏泊尔家电制造有限公司 | Water level detection circuit and electric rice cooker |
| CN110160597A (en) * | 2019-06-11 | 2019-08-23 | 宁波市机电工业研究设计院有限公司 | A kind of water level detection circuit based on positive and negative symmetrical square wave direct current |
| CN210663244U (en) * | 2019-10-12 | 2020-06-02 | 宁波奥克斯电气股份有限公司 | Outer quick-witted chassis warning device and outer machine of air conditioner of intaking of air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220251A (en) * | 2021-12-23 | 2022-03-22 | 西安芯海微电子科技有限公司 | Water level monitoring and early warning circuit and method and electronic equipment |
| CN114878198A (en) * | 2022-06-06 | 2022-08-09 | 珠海格力电器股份有限公司 | Fault detection circuit and method and air conditioning equipment |
| CN114878198B (en) * | 2022-06-06 | 2023-05-30 | 珠海格力电器股份有限公司 | Fault detection circuit and method and air conditioning equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113048631A (en) | Water level detection circuit and electronic equipment | |
| US20110025518A1 (en) | Under-voltage warning circuit | |
| CN103050092B (en) | A kind of protection circuit of backlight drive circuit, backlight module and liquid crystal indicator | |
| CN209342931U (en) | Water leakage detection device and machine room air conditioner | |
| CN203858468U (en) | Air conditioner standby power consumption control circuit and air conditioner | |
| CN210835658U (en) | Remote monitoring system applied to well lid | |
| JP2020025174A (en) | Weather camera with wiper | |
| CN210899112U (en) | Electronic switch circuit with low power consumption | |
| CN105128781A (en) | Automobile reversal monitoring system | |
| CN111736088B (en) | Power state indicating circuit | |
| CN211236201U (en) | RS232 interface state detection circuit | |
| CN207977898U (en) | The voltage compensating circuit of vehicle systems basic chips | |
| CN203455916U (en) | Smoke alarm with high sensitivity | |
| CN220552991U (en) | AC/DC charging pile soaking detection circuit and charging pile | |
| CN215897284U (en) | Outdoor equipment infiltration protection device | |
| CN216925998U (en) | Water leakage sensor device for machine room | |
| CN215072351U (en) | Control circuit, circuit board and sterilizer | |
| CN219496628U (en) | Zero live wire detects and warning circuit | |
| CN211178656U (en) | Water level detection circuit and device | |
| CN215773093U (en) | Driving device with signal intensifier | |
| CN101470659B (en) | Electronic system and its warning device | |
| CN213461986U (en) | Remote controller circuit, remote controller and television detection system | |
| CN210274141U (en) | 5G micro base station on-line monitoring system | |
| CN218124313U (en) | Matched resistance protection circuit and communication system | |
| CN213879628U (en) | Power supply driving circuit and power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210629 |
|
| WW01 | Invention patent application withdrawn after publication |