CN213932731U - Conductive liquid level sensor and hydroelectric device and beverage machine that constitute thereof - Google Patents

Abstract

A conductive liquid level sensor, a hydroelectric device and a beverage machine. A plurality of metal electrodes are arranged in a container of the conductive liquid to be detected according to needs, and a metal common electrode is arranged in the container and is in contact with the lowest liquid level corresponding to different liquid level depths of the conductive liquid. When the output end of the intelligent digital controller outputs a preset change signal, all the electrodes immersed in the conductive liquid receive the mapped change signal and are recognized by the computer to calculate the real-time liquid level. The conductive liquid level sensor can be used in various places related to conductive liquid level measurement, particularly hydroelectric devices including beverage machines, and has the advantages of no or low failure of electrodes due to rusting and scaling, long service life, simple and reliable circuit and low cost.

Description

Conductive liquid level sensor and hydroelectric device and beverage machine that constitute thereof

Technical Field

The utility model relates to a conducting solution level sensor and water and electricity device and beverage machine that constitute thereof.

Background

The liquid level detection is provided with a floating ball type liquid storage tank and an electrode type liquid storage tank, the former is expensive, the production and processing technology is troublesome, the production period is long, the waterline is deep due to the weight of the magnet, so that the liquid bottom cannot be detected and the false detection is caused (the liquid cannot float when being shallow, for example, a floating ball with the thickness of 28mm can float and can be detected only when needing at least 15mm of water depth), and particularly, a large amount of residual liquid in the cuboid liquid storage tank cannot be completely pumped out, so that a large amount of waste is caused; the processing technology is troublesome, and the order production period is long; is not easy to clean, and the middle plastic pipe is easy to bend and scrap. The latter is used as a traditional electrode type and is mostly used for detecting water level. Because the electrode can touch the bottom of the liquid, the bottom of the container is easy to be detected, and the liquid is easy to be pumped out without leaving residual water. The fatal shortcoming is: because the mineral substance is many in aquatic, normal electrode circular telegram measurement can lead to electrode corrosion because of the electrolysis effect, even if stainless steel material also can rust and scale deposit because of the electrolysis and fail, short-lived, use cost height. It is also said that attempts have been made to measure water level by floating the electrodes off the ground in the container to mitigate scaling, but the circuit is very complex and in most cases unsafe because the container cannot be grounded, and 3C certification has not been available to date.

The method for measuring the level of the conducting liquid has the advantages of long service life, simple circuit and low cost, and is necessary to be used for an intelligent liquid level sensor and a hydroelectric device contained in a beverage machine (including a water dispenser).

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to overcome the above defects by the inventor, and to design a conductive liquid level sensor which can prevent scale, has simple structure, easy manufacture and low cost, and to use it to construct a hydroelectric device and a beverage machine (including water dispenser, kungfu tea machine, coffee machine, fruit juice machine, etc.) which need to detect the liquid level of the conductive liquid.

The method according to the utility model is that:

a method for measuring the liquid level of a conductive liquid comprises the following steps:

step 1: adding conductive liquid to be measured into a container, arranging a metal common electrode, and respectively arranging a metal electrode at the corresponding height position of each level of liquid level of the conductive liquid to be measured;

step 2: setting a computer-based intelligent controller;

and step 3: a capacitor which plays a role in signal blocking and mapping is connected to a digital output end of the controller, and the output end of the capacitor is connected with the metal common electrode;

and 4, step 4: respectively connecting each level of liquid level electrode with a signal input end of an intelligent controller;

and 5: transmitting a low-to-high change signal or a high-to-low change signal from the digital output terminal of the intelligent controller;

step 6: judging which one or ones of the signal input ends receive the mapping signals corresponding to the output ends, wherein the highest electrode currently receiving the response represents that the conductive liquid is leveled to the highest liquid level in real time, and each electrode does not receive the mapping signals and indicates that the liquid level is lower than the liquid level of the lowest electrode, and is in a liquid shortage state or no liquid;

and 7: and the intelligent controller calculates and judges the real-time state of the liquid level according to the received mapping signal, sends out a preset control command, displays, alarms and/or outputs actions, and then returns to the step 1 according to the command to cyclically and cyclically carry out itinerant detection or quit.

The further improvement lies in that:

a step 51 is also inserted between said steps 5 and 6: after maintaining the high level signal from low to high for a plurality of long times, outputting a high to low level from a signal output end to discharge the capacitor; or vice versa, the capacitor is charged.

The technical scheme of the utility model is that:

a kind of conducting liquid level sensor, characterized by including a computer-based intelligent controller, its certain digital output end links with one end of a electric capacity, link with another end of the electric capacity a metal common electrode communicating with conducting liquid in the container while using, on at least one signal input end of the hierarchical according to liquid level depth detected of the controller (MCU), connect with the corresponding metal electrode step by step according to the liquid level depth detected; the intelligent controller on the digital output end outputs a detection excitation signal converted from low level to high level or from high level to low level within a preset time interval, and a mapped liquid level signal is synchronously received on the corresponding digital output end connected with the metal electrode touched by the liquid level according to the time sequence.

The liquid level sensor is characterized in that the intelligent controller is connected with an Internet of things chip or wireless receiving and sending modules such as Bluetooth and wifi.

A hydroelectric installation, characterized by that including the container, there are water pumps, water pipes, water nozzles and human-computer interface on the container, these things are controlled by an intelligent controller, there is a metal common electrode at the bottom of the container, or make the container with the metal directly, link it with metal common electrode, from low to high in the container, set up at least one metal electrode as required; the metal common electrode is connected with a digital output end of the intelligent controller through a capacitor, and each metal electrode is respectively connected with a signal input end of the intelligent controller.

The hydroelectric installation, its characterized in that every interval sets for the time staggered output a period of high level low level or low level high level signal of level on the digital output terminal corresponding mapping signal is produced according to the liquid level state on the signal input terminal for the real-time sampling of intelligent control ware, discernment, calculation liquid level state, and the instruction of the demonstration, the warning and/or the control of liquid feeding, liquid level control, liquid heating, scarce liquid is sent out.

The hydroelectric device is characterized in that the intelligent controller is connected with an Internet of things chip or wireless receiving and sending modules such as Bluetooth and wifi.

Use the water dispenser that hydroelectric device constitute, its characterized in that the conducting liquid is drinking water or beverage, the container is water (or beverage) case and electric heat kettle, cask or the heating chamber of cylinder, cuboid or square, is equipped with electric heater, temperature sensor in electric heat kettle, cask or the heating chamber, these objects all through input/output interface with intelligent control ware links to each other. The sensor and the hydroelectric installation manufactured by the method of the utility model, including the beverage dispenser, have the characteristics of simplicity, practicality, reliability, low manufacturing cost, difficult corrosion of the electrode and difficult scaling. The conductive liquid detection device can be widely used for replacing occasions needing detection of the conductive liquid in the prior art, and is an indispensable technical product for Internet of things, smart homes and smart cities, such as rivers, lakes and seas flood control, swimming pools, water dispensers, beverage dispensers, coffee makers and juice makers.

The present invention will be described in more detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a block diagram of the steps of the method according to the present invention (high level to low level pulse or square wave);

fig. 2 is a block diagram of the steps of the method according to the present invention (low level to high level pulse or square wave, container is conductor, metal common electrode is connected to container);

FIG. 3 is a schematic diagram of one embodiment of the liquid level sensor of the present invention (without a transmitter circuit in the sensor);

FIG. 4 is a schematic diagram of another embodiment of the liquid level sensor of the present invention (the sensor includes a transmitting circuit based on MCU single chip computer and an external device 5);

FIG. 5 is a schematic view of a liquid level sensor according to the present invention (an intelligent sensor combined with a radio frequency wireless communication SoC computer MCU system);

fig. 6 is a schematic diagram of a hydroelectric installation (an intelligent hydroelectric installation combined with a SoC computer system based on radio frequency wireless communication) formed by a liquid level sensor according to the present invention;

FIG. 7 is a schematic view of a water purifying/drinking machine composed of a liquid level sensor based on a radio frequency wireless communication SoC computer system (filter element and water pump are omitted);

fig. 8 is a schematic view of a barreled water kungfu tea machine composed of a liquid level sensor and an MCU computer (the electric kettle, the water nozzle, the water pump and the like are not shown).

Detailed Description

Example 1: a method for measuring the level of a conductive liquid is disclosed, as shown in figures 1 and 2, and comprises the following steps:

step 1: a container 1 is filled with a conductive liquid to be tested, such as water or orange juice, herbal tea. Arranging a metal common electrode 2 electrically communicated with the conductive liquid, and respectively arranging metal electrodes (a first metal electrode L1 … …, an nth metal electrode Ln) at the corresponding height positions of the liquid levels of all levels of the conductive liquid to be measured, such as a high third metal electrode L3, a middle second metal electrode L2 and a low first metal electrode L1 to form three-level liquid level detection, wherein the liquid levels can be converted into height scales of corresponding containers, n in the Ln represents the highest level, and as shown in figures 3 to 8, L3 represents the highest level;

step 2: setting an intelligent controller MCU based on a single chip computer, for example, building by taking an ARM series single chip microcomputer as a core;

and step 3: a capacitor C1 which plays a role in signal blocking and direct current mapping is connected to a digital output end O1 of the controller, and the output end of the capacitor C1 is connected with the metal common electrode 2;

and 4, step 4: respectively connecting a low-level first metal electrode L1, a middle-level second metal electrode L2 and a high-level third metal electrode L3 with a first signal input end I1, a second signal input end I2 and a third signal input end I3 of an intelligent controller MCU;

and 5: transmitting a change signal from low to high level or a change signal from high to low level from the digital output end O1 of the intelligent controller, reading and identifying the corresponding change signals mapped on each electrode by the blocking jump of the capacitor and the conductive liquid by the MCU, such as: pulse square waves jumping from low to high for 50 ms;

step 51: after maintaining a high level signal from low to high for a plurality of long times, outputting a high to low level from a signal output end to discharge the capacitor, or vice versa;

step 6: judging which one or more of the signal input ends (the first signal input end I1 to the nth signal input end In) receives the mapping signal corresponding to the output end O1, wherein the metal electrode at the highest position currently receiving the response represents that the conductive liquid is leveled to the highest liquid level In real time, and each metal electrode does not receive the mapping signal, which indicates that the liquid level is lower than the liquid level of the metal electrode at the lowest position, and is In a liquid shortage state or no liquid state;

and 7: and the intelligent controller calculates and judges the real-time state of the liquid level according to the received mapping signal, sends out a preset control command, displays, alarms and/or outputs actions, and then returns to the step 1 according to the command to cyclically and cyclically carry out itinerant detection or quit.

Such as: the liquid level is lower than the lowest first metal electrode L1, the detection signal sent by the output terminal O1 mapped by the capacitor C1 cannot be received by the three levels of the high third metal electrode L3, the middle second metal electrode L2 and the low first metal electrode L1 due to the open circuit, and the corresponding signal input terminals (the first signal input terminal I1 to the nth signal input terminal In) also cannot receive the corresponding mapping signal, which indicates that the conductive liquid is drained, used up or short of the liquid.

When the liquid level is higher than or equal to the second metal electrode L2 at the middle position, but higher than the first metal electrode L1 at the lower position, the third metal electrode L3 at the upper position cannot receive the detection signal from the digital output terminal O1 mapped by the capacitor C1 due to the open circuit, the corresponding third signal input terminal I3 cannot receive the corresponding mapping signal, but the first signal input terminal I1 and the second signal input terminal I2 receive the corresponding mapping signal, which indicates that the conductive liquid is at the liquid level at the middle height.

When the liquid level reaches the third metal electrode L3 with a high level, the third metal electrode L3 with a high level, the second metal electrode L2 with a medium level, and the first metal electrode L1 with a low level all receive detection signals sent by the output end O1 mapped by the capacitor C1, and the corresponding first signal input end I1, the second signal input end I2, and the third signal input end I3 receive corresponding mapping signals, which indicate that the conductive liquid is at the highest liquid level, and the intelligent controller MCU performs corresponding control.

Example 2:

the method of the utility model can be used in many occasions of liquid level measurement and hydroelectric installation. Such as: the water and electricity device for monitoring the water supply tank on the roof forms an automatic water adding device.

A hydroelectric installation as shown in figures 6-8. The intelligent water tank comprises a container 1 serving as a water tank, a water pump, a water pipe, a water outlet nozzle and a human-computer interaction interface 3 are arranged on the container, the objects are controlled by an intelligent controller MCU, a metal common electrode 2 which directly reaches the bottom of the container is arranged in the container 1, or the container 1 is directly made of metal, and the metal common electrode 2 is connected with the container. From low to high in the container 1, not less than 1 metal electrode (metal electrode L1 … … metal electrode Ln), such as 10 metal electrodes, is provided as required. The metal common electrode is connected with a digital output end O1 of the intelligent controller through a capacitor C1, and each metal electrode is respectively connected with each corresponding signal input end (signal input end I1 to signal input end I10) of the intelligent controller.

The digital output end O1 alternately outputs signals of high level changing to low level or low level changing to high level at set time intervals, and each signal input end (signal input end I1 to signal input end I10) generates corresponding mapping signals according to the liquid level state, so that the intelligent controller can sample, identify and calculate the liquid level state in real time and send out the instructions of liquid adding, liquid level control, liquid heating, liquid shortage display, alarm and/or control.

And the intelligent controller MCU is connected with an Internet of things chip or wireless receiving and sending modules 6 such as Bluetooth and wifi, and the AT is an antenna of the intelligent controller MCU.

The intelligent controller MCU comprises the following control time sequences for preventing scaling, accurately and reliably detecting the liquid level:

a. adding water to be measured into a container 1, arranging a metal common electrode 2 which reaches the bottom of the container, and respectively arranging a metal electrode (a first metal electrode L1 … … and a tenth metal electrode L10) at the corresponding height position of each level of liquid level of the water to be measured, wherein the number of the metal electrodes is one per 0.5 meter, and the maximum water level is 5 meters;

b. setting an intelligent controller MCU based on a computer;

c. a capacitor C1 which plays a role in signal blocking direct current mapping is connected to a digital output end O1 of the intelligent controller, and the output end of the capacitor C1 is connected with the metal common electrode 2;

d. respectively connecting metal electrodes (a first metal electrode L1 to a tenth metal electrode L10) of each stage with a signal input end (a signal input end I1 to a signal input end I10) of an intelligent controller MCU;

e. transmitting a low-to-high change signal or a high-to-low change signal from the digital output O1 of the intelligent controller;

e 1: after maintaining the high level signal from low to high for a plurality of long times, outputting a high to low level from a signal output end to discharge the capacitor; or vice versa, the capacitor is charged.

f. Judging which one or ones of the signal input ends (signal input end I1 to signal input end I10) receive the mapping signal corresponding to the digital output end O1, wherein the highest electrode currently receiving the response represents that the liquid level exceeds the highest liquid level in real time, and each electrode does not receive the mapping signal, which indicates that the liquid level is lower than the liquid level of the lowest electrode, and is in a liquid shortage state or is in a liquid absence state;

g. and the intelligent controller MCU calculates and judges the real-time state of the liquid level according to the received mapping signal, sends out a preset control command, displays, alarms and/or outputs actions, and then returns to the step 1 according to the command to cyclically and cyclically carry out itinerant detection or quit.

Example 3:

the utility model is applied to a water dispenser, as shown in figures 6-8. The conductive liquid is specifically drinking water, and the container 1 is made into a cylindrical bucket (such as barreled water sold in the market), a specially-made cuboid or cube drinking water storage box, and can also be used as an electric heating water bucket, an electric heating water boiling tank or an electric heating water boiling kettle of a water boiler or a kungfu tea set. The beverage machine is also provided with a water pump, a water pumping pipe, a water outlet nozzle, an electric heater, a temperature sensor and a human-computer interaction interface (comprising a display and a keyboard), and the objects are controlled by an intelligent controller MCU.

Example 4:

the beverage machine manufactured based on the method of the utility model, the conductive liquid refers in particular to beverages, such as herbal tea, fruit juice, etc. The container 1 is a cylindrical bucket, a cuboid or a cube beverage box and/or an electric heating kettle, a water boiling bucket or a water boiling box. A water pump, a water pipe, a water outlet nozzle, an electric heater, a temperature sensor and a human-computer interaction interface are arranged on the beverage dispenser, the objects are controlled by the intelligent controller MCU, a metal common electrode is arranged at the bottoms of the drinking water barrel or the beverage box and the kettle, or the shell of the drinking water barrel or the beverage box and/or the kettle is directly made of metal, the metal shell is connected with the metal common electrode 2, at least 3 metal electrodes (a first metal electrode L1, a second metal electrode L2 and a third metal electrode L3) are arranged in the metal shell from low to high as required; the metal common electrode 2 is connected with a digital output end O1 of the intelligent controller through a capacitor C1, and each metal electrode is respectively connected with a signal input end (a first signal input end I1, a second signal input end I2 and a third signal input end I3) of the intelligent controller.

The digital output end O1 alternately outputs signals of low level changing high level or high level changing low level for a period of time at intervals of 100ms-1s, and generates corresponding mapping signals on the signal input end according to the liquid level state, so that the intelligent controller can sample, identify and calculate the liquid level state in real time and send out instructions of liquid adding, liquid level control, liquid heating, liquid shortage display, alarm and/or control.

The intelligent controller MCU is connected with an Internet of things chip or wireless transceiving chips such as Bluetooth and wifi, and wireless communication can be achieved.

Example 5:

a conductive liquid level sensor, as shown in figures 3, 4 and 5. The intelligent controller MCU comprises a computer-based intelligent controller MCU, wherein a certain digital output end O1 of the intelligent controller MCU is connected with one end of a capacitor C1, the other end of the capacitor C1 is connected with a metal common electrode 2 communicated with water in a container when in use, and 3 metal electrodes (a first metal electrode L1, a second metal electrode L2 and a third metal electrode L3) are connected on 3 signal input ends (a first signal input end I1, a second signal input end I2 and a third signal input end I3) of the intelligent controller MCU which are divided into 3 stages according to the depth of a liquid level to be detected step by step according to the depth of the liquid level to be detected; an intelligent controller on a digital output end O1 outputs a pulse square wave detection excitation signal which is changed from low level to high level or from high level to low level within a preset time interval (such as 100mm-1000ms), and mapped liquid level signals are synchronously received on corresponding digital output ends (a first signal input end I1, a second signal input end I2 and a third signal input end I3) connected with metal electrodes (a first metal electrode L1, a second metal electrode L2 and a third metal electrode L3) touched by the liquid level according to time sequence.

The intelligent controller MCU is connected with an Internet of things chip or wireless transceiving chips such as Bluetooth and wifi, and wireless communication can be achieved.

Claims (6)

1. A conductive liquid level sensor is characterized by comprising a computer-based intelligent controller (MCU), wherein a certain digital output end (O1) of the intelligent controller is connected with one end of a capacitor (C1), the other end of the capacitor (C1) is connected with a metal common electrode (2) which is communicated with conductive liquid in a container when in use, and corresponding metal electrodes are connected on at least one signal input end of the controller (MCU) in a grading mode according to the depth of a liquid level to be detected step by step according to the depth of the liquid level to be detected; an intelligent controller on a digital output end (O1) outputs a detection excitation signal which is changed from low level to high level or from high level to low level within a preset time interval, and a mapped liquid level signal is synchronously received on a corresponding digital output end connected with a metal electrode touched by the liquid level according to time sequence.

2. The liquid level sensor according to claim 1, wherein the intelligent controller (MCU) is connected with an Internet of things chip or a wireless transceiver module (RF) such as Bluetooth and wifi.

3. A hydroelectric installation is characterized by comprising a container (1), wherein a water pump, a water pipe, a water outlet nozzle and a human-computer interaction interface (3) are arranged on the container, the objects are controlled by an intelligent controller (MCU), a metal common electrode (2) is arranged at the bottom of the container (1), or the container (1) is directly made of metal and is connected with the metal common electrode (2), the container (1) is from low to high, and at least one metal electrode is arranged as required; the metal common electrode is connected with a digital output end (O1) of the intelligent controller through a capacitor (C1), and each metal electrode is respectively connected with a signal input end of the intelligent controller.

4. The hydroelectric installation according to claim 3, wherein the digital output (O1) outputs signals of high level and low level and high level alternately at set time intervals, and generates corresponding mapping signals according to the liquid level state at the signal input end, so that the intelligent controller can sample, identify and calculate the liquid level state in real time and send out instructions for liquid filling, liquid level control, liquid heating, display of liquid shortage, alarm and/or control.

5. The hydroelectric device according to claim 4, wherein the intelligent controller (MCU) is connected with an Internet of things chip or a wireless transceiver module (RF) such as Bluetooth and wifi.

6. The water dispenser of any one of claims 3, 4 to 5 consisting of a hydroelectric device, characterized in that the conductive liquid is drinking water or beverage, the container (1) is a cylindrical bucket, a cuboid or a cube of beverage box and an electric heating kettle, a water boiling bucket or a water boiling tank, an electric heater and a temperature sensor are arranged in the electric heating kettle, the water boiling bucket or the water boiling tank, and the objects are connected with the intelligent controller (MCU) through an input/output interface (4).

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