Liquid level display monitor

Abstract

A liquid level display monitor belongs to the field of electronic products. The water level and water consumption of the water container can be controlled in a full-function mode. The product comprises a water level sensor, a control circuit and a load installation circuit. The water level sensor is mainly composed of an external structure C and an internal structure D. A pressure transmission piece 8 in the internal structure D can generate a variable force when the water level in the water container changes, the transmission rod 7 moves backwards when the force is larger than the elastic force of the spring 6, and the transmission rod 7 moves forwards when the force is smaller than the elastic force of the spring 6. And the movement of the transmission rod 7 enables the movable sheet 5 at the other end of the transmission rod 7 to slide forwards or backwards on the fixed sheet 1. Resistance powder or multiple nodes are coated on the fixed piece 1, the movable piece 5 slides on the fixed piece 1 to generate variable electric signals, the variable electric signals can transmit water level change information to a control circuit, and therefore the main functions of water level display, water level upper and lower limit setting and water level automatic and manual control are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of electronic products, and is divided into two parts: a sensor and a control circuit. It has the main functions of water level display, water level upper and lower limit settings, water level automatic manual control, timed automatic water supply interface, etc., and can also be used in some other liquid aspects. Background Art

[0002] At present, some water level control technology products on the market can only be used on solar energy and electric water heaters, and cannot be well used on water tanks and large water containers, as well as other places where water levels need to be controlled. The relative humidity of the working environment cannot be too high. They can only display water levels one by one, and the sensors used are not ideal or not very economical. The more commonly used sensor electrode type will generate electricity in the water, and because the resistance of this electrode type sensor is divided into sections of resistance values, it has caused great limitations on the expansion of the application circuit.

[0003] The sensor used in this product has a continuously variable and adjustable resistance value in one way, and a node that does not generate resistance value but is a node one by one. It is insulated from water, and this sensor is only used for water and other liquids, and is highly targeted. In terms of the control circuit, it displays the water level in a continuous digital display of 0 to 100. In terms of function, it has multiple functions, which are novel, complete and unique. It is a classic circuit for water level control. This circuit can be used in the water level control of solar energy and electric water heaters, the water level control of water tanks and large water containers, and other places where the water level needs to be controlled. As long as you understand this product, it is not difficult to see the advantages of this product over previous products. Summary of the invention

[0004] The technical solution of this utility model is as follows:

[0005] Product structure:

[0006] This product is divided into several parts: sensor, control circuit, load installation circuit and panel design.

[0007] Sensor part:

[0008] Water level sensor in water container (such as Figure 1 )

[0009] It comprises an inner surface structure (D) and an outer surface structure (9); the inner surface structure is: a fixed plate (1) is mounted on a fixed plate bracket (2), and there are two schemes on the fixed plate (1), one scheme is to coat the fixed plate (1) with resistance powder, and the other scheme is to make multiple nodes on the fixed plate (1), and the resistance powder or nodes are led out by electrodes; one end of the movable plate (5) is close to the fixed plate (1), and the other end is mounted on the top of the transmission rod (7); when the fixed plate (1) is coated with resistance powder, the corresponding conductive part on the movable plate (5) The narrower portion g is designed to be in the shape of a letter "1"; when the fixed plate (1) is made into multiple nodes, the corresponding conductive portion g on the movable plate (5) is designed to be wider and in the shape of a whole plate; the movable plate (5) and the transmission rod (7) are installed on the semi-movable bracket (4) and pass through the inner part of the semi-movable bracket (4) to form a movable connection; the other end of the transmission rod (7) is connected to the rear part of the pressure transmission plate (8), and the transmission rod (7) is also covered with a telescopic spring (6), one end of the telescopic spring (6) is against the rear wall of the pressure transmission plate (8), and the other end is against the semi-movable bracket (4). The movable plate (5) and the transmission rod (7) are movable on the semi-movable bracket (4); the pressure transmission plate (8) is a telescopic body that can move back and forth under the action of the water level pressure and the telescopic spring (6), so that the transmission rod (7) and the movable plate (5) move back and forth, and the movable plate (5) slides on the fixed plate (1); when the water level of the sensor changes from 0 to the highest water level, its movable plate (5) slides from the beginning end of the fixed plate (1) to the end end; the outer structure (9) is circular, and the inner surface structure is connected to the fixed plate (1) by the fixed plate. The bracket (2) and the semi-movable bracket (4) are fixed to the inner wall of the outer structure (9); the front end of the pressure transmission plate (8) is glued to the front end of the inner wall of the outer structure (9); the entire sensor can be directly put into water, and can also be inserted into the inner surface of the circular additional part (10) and then fixed to the outer wall of the water container; the air inlet and outlet holes (12) and the electrode lead wire (13) are designed on the outer structure (9), and the filter (G) is sleeved on the front end of the outer structure (9); the electrode lead wire (13), the resistance powder, the node, and the g on the movable plate (5) are conductors. The sensor must be divided into a range, and there are two schemes for selecting the range. The first scheme is to adjust the elastic force of the telescopic spring (6); the second scheme is to keep the telescopic spring (6) unchanged and adjust the length of the resistance powder on the fixed plate (1) and the width of the node. The sensor can be designed into a range of 10 cm, 20 cm, 30 cm, 50 cm, 1 m, 1.5 m, 2 m, 3 m, 5 m, etc. according to the height of the water level. The actual height of the water level is obtained by multiplying the range by the proportional height.

[0010] Tap water pressure sensor, such as Figure 2 :

[0011] Its structure is basically the same as that of the water container water level sensor.

[0012] It comprises an outer structure (9) and an inner structure (C); the inner structure is as follows: a conductive spring (14) and a conductive spring (3) are mounted on the fixed sheet (1); a conductive contact (15) and a conductive contact (16) are mounted on the movable sheet (5); the conductive contact (15) and the starting end of the conductive spring (14) coincide with each other, and the conductive contact (16) and the starting end of the conductive spring (3) coincide with each other; the conductive spring (14) and the conductive contact (15) are used to control an electric pump, the conductive spring (14) is connected to an electrode lead wire (c), and the conductive contact (15) is connected to an electrode lead wire (d); the conductive spring (3) and the conductive contact (16) are used to control an electromagnetic valve, the conductive spring (3) is connected to an electrode lead wire (a), and the conductive contact (16) is connected to an electrode lead wire (b); the movable sheet (5) is connected to one end of a transmission rod (7), and the transmission rod (7) is mounted On the semi-movable bracket (4), the inner part of the semi-movable bracket (4) is passed through, and the movable connection can move forward and backward; the other end of the transmission rod (7) is installed on the rear part of the pressure transmission plate (8); the pressure transmission plate (8) is a telescopic body and can move forward and backward; the telescopic spring (6) is sleeved on the transmission rod (7), one end of which is pressed on the semi-movable bracket (4), and the other end is pressed on the rear part of the pressure transmission plate (8); the outer structure (9) is circular, and the inner surface structure is installed on the inner wall of the outer structure (9) through the fixing plate (1) and the semi-movable bracket (4), and the front end of the pressure transmission plate (8) is glued to the front end of the inner wall of the outer structure (9); a sliding cover (17) is designed on the outer structure (9); the sliding cover (17) is used to conveniently adjust the length of the conductive spring (14) and the conductive spring (3); the entire sensor is installed on the tee and connected to the tap water pipe.

[0013] Control circuit part

[0014] One of the control circuits when using resistor powder in sensors, such as Figure 3 , the water level sensor circuit diagram is as follows Figure 1 Middle (E) part.

[0015] The sensor in this circuit uses resistor powder; the whole circuit is divided into a front half and a back half, the front half includes: a water level height and electrical signal conversion circuit in a water container, an electrical signal amplifying circuit, an amplified electrical signal voltage distribution circuit, a water level display and water level control signal generating circuit, and an upper and lower limit water level setting conversion switch; the water level height and electrical signal conversion circuit is connected to the electrical signal amplifying circuit connected to the amplified electrical signal voltage distribution circuit, each unit of the voltage distribution circuit is connected to the water level display and water level control signal generating circuit on its own unit, and the water level control signal generating circuit is connected to the upper and lower limit water level setting conversion switch.

[0016] The water level in the water container and the electrical signal conversion circuit are composed of resistor R 49 , sensor W, resistor R 50The electric signal amplification circuit is composed of an operational amplifier IC3, and the voltage distribution circuit is composed of ten voltage regulator tubes D 1～ D 10 The water level display and water level control signal generating circuit has eleven stages consisting of transistors BG5-BG 15 , resistor R 16～ Resistor R 48 , each display frame, each display frame is composed of numbers written in liquid crystal, the upper and lower limit water level setting conversion switch is composed of the first row of contacts, the second row of contacts, the third row of contacts and two upper and lower limit conversion buttons; the a terminal of the sensor W is connected to the voltage divider resistor R 49 , R 49 Connect to the positive pole of the power supply; the b end of the sensor W is connected to the voltage divider resistor R 50 , R 50 Connect the negative pole of the power supply; the b end of the sensor W is connected to the conductive part g of the sliding end and then connected to the in-phase input end of the operational amplifier IC3. The inverting input end of the operational amplifier IC3 is grounded. The operational amplifier IC3 is connected to the positive and negative poles of the power supply. The output end of the operational amplifier IC3 is connected to ten voltage regulator tubes D 1～ D 10 A stable and balanced voltage distribution circuit is connected in series; each voltage dividing unit of the voltage distribution circuit is connected with a water level display and water level control signal generating circuit of the unit; the water level display and water level control signal generating circuit is divided into eleven levels of 0, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, each level is composed of a transistor, a base limiting current resistor of the transistor, a water level display frame and a collector limiting current resistor on the collector of the transistor, an emitter limiting current resistor of the transistor, and a corresponding voltage regulator connected to the voltage distribution circuit at the output end of IC3; the base limiting current resistor in each level is connected to the corresponding voltage regulator on the voltage distribution circuit at the output end of the operational amplifier IC3, the water level display frame and the current limiting resistor on the collector are connected in parallel and then connected to the positive pole of the power supply, the current limiting resistor on the emitter is grounded, and the water level control signal of each level is generated by the emitter of the transistor at this level The water level control signal generating lines of the first row of the upper and lower limit water level setting conversion switch are connected through lines; the second row of contacts in the conversion switch is set as the upper limit water level setting signal conversion contact points, and all contacts except the zero level in the second row are connected together to form the upper limit water level control line; the third row of contacts is the lower limit water level setting signal conversion contact points, and all contacts except the 100% level in the third row are connected together to form the lower limit water level control signal line; all water level control signal generating lines in the first row of the conversion switch can be converted into upper limit or lower limit water level control lines through the conversion of the upper limit conversion button or the lower limit conversion button; each contact of the conversion switch is rectangular, and there is only a small gap between the contacts in each row, and the conductive part of the conversion button is wider. When converting, the first level to be converted is connected first and then the current level is disconnected; the number of sections of the conversion switch is consistent with the number of levels of the water level display water level control signal generating circuit.

[0017] The impedance generated by each water level control signal output circuit can be connected to IC22 pin to make the voltage of pin 2 change from less than one-third of the power supply voltage to more than one-third of the power supply voltage, and can also be connected to IC26 pin to make the voltage of pin 6 change from less than two-thirds of the power supply voltage to more than two-thirds of the power supply voltage.

[0018] The upper limit water level control signal line and the lower limit water level control signal line connected from the conversion switch in the front half of the circuit are respectively connected to the back half of the circuit.

[0019] It should be pointed out that the lower limit setting function in the circuit can be omitted, and the lower limit can be fixed at the first level. The specific method is: connect the fixed lower limit signal line directly to the 2nd pin of IC2 in the following circuit without passing through the conversion switch. Set the third row of contacts of the conversion switch, and remove the lower limit conversion button.

[0020] The second control circuit when using resistor powder in the sensor. Figure 4 The water level sensor circuit diagram is as follows: Figure 1 Middle (E) part.

[0021] The sensor in this circuit uses resistor powder. The whole circuit is divided into the front half and the back half. The front half includes: a water level height in the water container and an electrical signal conversion circuit, an electrical signal amplification circuit, a water level display and water level control signal generation circuit, a water level upper and lower limit setting conversion switch, an upper limit water level signal amplification circuit and a circuit for changing the voltage of IC26 pin between lower than 2 / 3 of the power supply voltage and higher than 2 / 3 of the power supply voltage, and a lower limit water level signal amplification circuit and a circuit for changing the voltage of IC22 pin between lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage; the water level height and electrical signal conversion circuit is connected to the electrical signal amplification circuit connected to the water level display and water level control signal generation circuit connected to the first row of corresponding contacts in the water level upper and lower limit setting conversion switch, the second row of contacts in the conversion switch is connected to the upper limit water level signal amplification circuit and a circuit for changing the voltage of IC26 pin between lower than 2 / 3 of the power supply voltage and higher than 2 / 3 of the power supply voltage, and the third row of contacts in the conversion switch is connected to the lower limit water level signal amplification circuit and a circuit for changing the voltage of IC22 pin between lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage.

[0022] The water level in the water container and the electrical signal conversion circuit are composed of resistor R 27 , sensor W, resistor R 26 The electric signal amplification circuit is composed of the operational amplifier IC4, the water level display and water level control signal generation circuit is composed of the level indication integrated block IC3, the resistor R 22 , R 23 , R 24 , R 25 , LED VD9-VD 14The water level upper and lower limit setting switch consists of the first row of contacts, the second row of contacts, the third row of contacts, and two upper and lower limit setting conversion buttons. The circuit for amplifying the upper water level signal and changing the voltage of the integrated block IC26 pin consists of transistor BG6, resistor R 19 , R 20 , R 21 The circuit that amplifies the lower limit water level signal and changes the voltage on the IC22 pin consists of transistor BG5, resistor R 16 , R 17 , R 18 Composition: The a terminal of sensor W is connected to the voltage divider resistor R 27 , R 27 Connect to the positive pole of the power supply, and the b end of the sensor W is connected to the voltage divider resistor R 26 , R 26 Connect the negative pole of the power supply, connect the b end of the sensor W to the conductive part g of the sliding end, and then connect to the in-phase input end of the operational amplifier IC4. The inverting input end of the operational amplifier IC4 is grounded. The operational amplifier IC4 is connected to the positive and negative poles of the power supply. The output end of the operational amplifier IC4 is connected to the impedance matching resistor R 24 , R 25 Then connect it to the level signal input terminal 5 pin of the level indicator integrated block IC3 in the water level display and water level control signal generating circuit, the 2nd and 4th pins of the integrated block IC3 are grounded, the 3rd pin is connected to the positive pole of the power supply, the 6th pin is connected to the 7th pin and then connected to the resistor R 22 Then connect the 8th pin and then the resistor R 23 Then ground, pins 9, 10, 11, 12, and 13 are suspended, and pins 1, 18, 17, 16, 15, and 14 are connected to water level display LEDs VD9-VD 14 Then connect to the positive pole of the power supply; the water level control signal generating line is connected from pin 1, pin 18, pin 17, pin 16, pin 15 and pin 14 of the integrated block IC3 respectively, and then connected to the corresponding contacts in the first row of the water level upper and lower limit setting switch; the contacts except the zero level in the second row of the conversion switch are connected together as the upper limit water level signal control line; the contacts except the 100% level in the third row of the conversion switch are connected together as the lower limit water level signal control line; all the water level control signal lines in the first row can be converted into upper limit or lower limit water level signal control lines through the conversion of the upper limit or lower limit conversion button; each contact of the conversion switch is rectangular, and there is a small gap between the contacts in each row, and the conductive part of the conversion button is wider. When converting, the first level to be converted is connected first and then the current pole is disconnected; the upper limit water level signal control line in the conversion switch is connected to the base current limiting resistor R of BG6 in the circuit that amplifies the upper limit water level signal and changes the voltage of IC26 pin 21 One end of the resistor R 21 The other end is connected to the base of transistor BG6; transistor BG6 is used to amplify the upper limit signal, and resistor R 19 , R 20To make the voltage at pin 26 of the integrated circuit produce a variable resistance; resistor R 19 Connect to the collector of transistor BG6 and then to the positive pole of the power supply, resistor R 20 Connected to the emitter of transistor BG6 and then to ground. The upper limit water level control signal is connected to the emitter of transistor BG6. The lower limit water level signal control line in the conversion switch is connected to the base current limiting resistor R of transistor BG5 in the circuit to amplify the lower limit water level signal and change the voltage of IC22 pin. 18 One end of the resistor R 18 The other end is connected to the base of transistor BG5; transistor BG5 is used to amplify the lower limit signal, and resistor R 16 , R 17 In order to make the voltage at pin 2 of IC2 produce a variable resistance, the resistor R 16 Connect to the collector of transistor BG5 and then to the positive pole of the power supply, resistor R 17 After being connected to the emitter of BG5, it is connected to the negative pole of the power supply, and the lower limit water level control signal line is connected to the emitter of transistor BG5.

[0023] The collector resistance R of the upper water level signal amplifier transistor BG6 19 With emitter resistor R 20 The voltage generated after transistor BG6 is saturated can change the voltage of pin 6 of IC2 from less than two-thirds of the power supply voltage to more than two-thirds of the power supply voltage. 16 With emitter resistor R 17 The voltage generated after transistor BG5 is saturated can change the voltage of pin 2 of IC2 from one-third of the power supply voltage lower than one-third of the power supply voltage to one-third of the power supply voltage higher than one-third of the power supply voltage.

[0024] The upper limit water level control signal line and the lower limit water level control signal line connected to the emitter of transistor BG6 and the emitter of transistor BG5 in the first half of the circuit are respectively connected to the second half of the circuit.

[0025] It should be noted that the lower limit setting function in the circuit can also be omitted, and the lower limit can be fixed at one point. The method is to connect the signal line when the water level of the water container is 0 directly to R without passing through the conversion switch. 18 , remove all the third row of contacts and transfer buttons in the setting transfer switch.

[0026] The third control circuit when using resistor powder in the sensor, such as Figure 5 The water level sensor circuit diagram is as follows: Figure 1 Middle (E) part.

[0027] The sensor in this circuit uses resistor powder. The whole circuit is divided into the front half and the back half. The front half includes: upper limit given value circuit, upper limit given value amplification circuit, upper limit given value digital tube digital display circuit, water level height in the water container is converted into electrical signal circuit, actual water level signal amplification circuit, actual water level digital tube digital display circuit, lower limit given value circuit, lower limit given value amplification circuit, lower limit given value digital tube digital display circuit, upper limit given value and actual water level signal voltage comparison amplification circuit, lower limit given value and actual water level signal voltage comparison amplification circuit, upper limit water level signal amplification and conversion circuit between IC26 pin voltage higher than 2 / 3 of the power supply voltage and lower than 2 / 3 of the power supply voltage, lower limit water level signal amplification and conversion circuit between IC22 pin voltage lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage.

[0028] The upper limit given value circuit is connected to the upper limit given value amplifier circuit, one path of the upper limit given value amplifier circuit is connected to the upper limit given value digital tube digital display circuit, and the other path is connected to the upper limit given value and actual water level signal voltage comparison amplifier circuit.

[0029] The water level of the water container is converted into an electrical signal circuit connected to the actual water level signal amplifying circuit. One path of the actual water level signal amplifying circuit is connected to the actual water level digital tube digital display circuit, and the other path is connected to the upper limit given value and the actual water level signal voltage comparison amplifying circuit on the one hand, and the lower limit given value and the actual water level signal voltage comparison amplifying circuit on the other hand.

[0030] The lower limit given value circuit is connected to the lower limit given value amplifier circuit, one path of the lower limit given value amplifier circuit is connected to the lower limit given value digital tube digital display circuit, and the other path is connected to the lower limit given value and actual water level signal voltage comparison amplifier circuit.

[0031] The upper limit given value and the actual water level signal voltage comparison amplifier circuit are connected to the upper limit water level signal amplification and the IC26 pin voltage is converted between lower than 2 / 3 of the power supply voltage and higher than 2 / 3 of the power supply voltage; the lower limit given value and the actual water level signal voltage comparison amplifier circuit are connected to the lower limit water level signal amplification and the IC22 pin voltage is converted between lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage.

[0032] The upper limit given value circuit consists of resistor R 31 , R 32 , potentiometer W1, the upper limit set value amplifier circuit is composed of op amp integrated block IC 7-1 The upper limit given value digital tube digital display circuit is composed of digital tube digital display driver IC4, capacitor C 3～ C7, resistor R 26 -R 30 , digital tube; the water level in the water container is converted into an electrical signal circuit by a resistor R 38 , R39 Sensor W; the actual water level signal amplification circuit is composed of an op amp integrated circuit IC 7-2 Composition: The water level digital tube digital display circuit of the water container is composed of the digital tube digital display driver integrated block IC5, capacitor C 8～ C 12 , resistor R 33～ R 37 , digital tube; the lower limit given value circuit is composed of resistor R 45 , R 46 , potentiometer W2; the lower limit given value amplifier circuit is composed of an operational amplifier integrated block IC 7-3 Composition: The lower limit given value digital tube digital display circuit consists of a digital tube digital display driver IC6, a capacitor C 13～ C 17 , resistor R 40～ R 44 , digital tube; the upper limit given value and the actual water level signal voltage comparison amplifier circuit is composed of a comparison amplifier integrated block IC 3-1 , resistor R 22 , R 23 Composition: The lower limit given value and the actual water level signal voltage comparison amplifier circuit is composed of a comparison amplifier integrated block IC 3-2 , resistor R 24 , R 25 The circuit for amplifying the upper water level signal and changing the voltage on the IC26 pin consists of transistor BG6, resistor R 19 , R 20 , R 21 The circuit for amplifying the lower limit water level signal and changing the voltage on the IC22 pin consists of transistor BG5, resistor R 16 , R 17 , R 18 composition.

[0033] In the upper limit water level setting circuit, the potentiometer W1 is connected to the resistor R 32 The back is connected to the positive pole of the power supply, and the lower end of W1 is connected to the resistor R 31 Then connect it to the negative pole of the power supply; the lower end of the potentiometer W1 is connected to the sliding end and then connected to the operational amplifier IC 7-1 The non-inverting input terminal of the op amp IC 7-1 The inverting input terminal of the op amp IC is grounded. 7-1 Connect the positive and negative poles of the power supply, op amp IC 7-1 The output end is connected to the voltage input end 31 pin of the integrated circuit IC4. The integrated circuit IC4 is combined with the digital tube to display the range between 0-100; the op amp IC 7-1 The output end of the other way is connected to the resistor R 22 Then connect to the comparator amplifier IC 3-1 The non-inverting input terminal.

[0034] In the actual water level of the water container, the a terminal of the sensor W is connected to the voltage divider resistor R 39 , resistor R 39 Connect to the positive pole of the power supply, and the b end of the sensor W is connected to the voltage divider resistor R 38 , resistor R 38 Connect the negative pole of the power supply, connect the b end of the sensor W to the conductive part g of the sliding end, and then connect it to the operational amplifier IC 7-2 The non-inverting input terminal of the op amp IC 7-2 The inverting input terminal of the op amp IC is grounded. 7-2 The output end is connected to the voltage input end 31 pin of IC5, and the display range of IC5 combined with the digital tube is between 0-100; the op amp IC 7-2 The other side of the output end is connected to the resistor R 23 Then connect to the comparator amplifier IC 3-1 The inverting input terminal; on the other hand, connect the resistor R 24 Then connect to the comparator amplifier IC 3-2 The non-inverting input terminal.

[0035] In the lower limit water level setting circuit, the potentiometer W2 is connected to the resistor R 46 Then connect the positive pole of the power supply and the lower end of W2 to the resistor R 45 Then connect it to the negative pole of the power supply, the lower end of the potentiometer W2 is connected to the sliding end and then connected to the operational amplifier IC 7-3 The non-inverting input terminal of the op amp IC 7-3 The inverting input terminal of the op amp IC is grounded. 7-3 The output end is connected to the voltage input end 31 pin of IC6. The display range of IC6 and digital tube is between 0-100. 7-3 The output end of the other way is connected to the resistor R 25 Then connect to the comparator amplifier IC 3-2 The inverting input terminal.

[0036] Amplifier IC for comparing voltage between upper limit given value and actual water level signal 3-1 The upper limit given value is connected to its non-inverting input terminal, the actual water level signal voltage is connected to its inverting input terminal, and its output terminal is connected to the base current limiting resistor R of the transistor BG6 in the circuit to amplify the upper limit water level signal and change the voltage of the integrated circuit IC26 pin. 21 The transistor BG6 is used to amplify the upper water level signal, and the resistor R 19 , R 20 In order to make the voltage at pin 26 of the integrated circuit produce a variable resistance, the resistor R 19 Connect to the collector of transistor BG6 and then to the positive pole of the power supply, and resistor R 20 It is connected to the emitter of transistor BG6 and then grounded. The upper limit water level control signal line is connected to the collector of transistor BG6.

[0037] Amplifier IC for comparing the lower limit given value with the actual water level signal voltage 3-2 The actual water level signal voltage is connected to its in-phase input terminal, the lower limit given value is connected to its inverting input terminal, and its output terminal is connected to the lower limit water level signal to amplify the on-off and make the voltage of the integrated block IC22 pin change. The base current limiting resistor R of the transistor BG5 in the circuit 18 Upper; transistor BG5 is used to amplify the lower limit water level signal, and resistor R 16 , R 17 To make the voltage at pin 22 of the integrated circuit produce a variable resistance; the resistor R 16 Connect to the collector of transistor BG5 and then to the positive pole of the power supply, resistor R 17 It is connected to the emitter of transistor BG5 and then grounded. The lower limit water level control signal is output from the emitter of transistor BG5.

[0038] IC4, IC5, and IC6 are integrated blocks of the same model, with internal circuits of A / D analog-to-digital conversion, decoding drive, and two-and-a-half-digit display, with a display range of 0 to 100. Their peripheral components and all parameters are the same.

[0039] IC 7-1 、IC 7-2 、IC 7-3 All parameters of the circuit and its peripheral components are the same, and the output voltage at the output terminal is also the same.

[0040] The upper limit water level control signal line and the lower limit water level control signal line generated by transistors BG6 and BG5 in the first half of the circuit are respectively connected to the second half of the circuit.

[0041] It should be pointed out that the lower limit setting function can be omitted and the lower limit can be fixed at one point. The circuit is that the actual water level signal is directly connected to the base current limiting resistor R of the lower limit signal amplifying transistor BG5 according to the dotted line part. 18 Set the lower limit to display the IC in the circuit 7-3 , R 46 , W2, R 45 , IC6, digital tube, lower limit water level signal comparison amplifier IC 3-2 Leave it all out.

[0042] Control circuit when multiple nodes are used in sensors. Figure 6 The water level sensor circuit diagram is as follows: Figure 1 Middle (F) part.

[0043] The whole circuit is divided into the front half and the back half. The front half includes: the water level height is converted into an electrical signal, a water level display circuit, a water level control signal line, an upper and lower limit water level setting conversion switch, an upper limit water level signal on-off amplification and a circuit that makes the voltage of the integrated block IC26 pin change between 2 / 3 of the power supply voltage and 2 / 3 of the power supply voltage, a lower limit water level signal on-off amplification and a circuit that makes the voltage of the integrated block IC22 pin change between 1 / 3 of the power supply voltage and 1 / 3 of the power supply voltage; the water level height is converted into an electrical signal connected to the water level display circuit, and the water level height is converted at the same time. The electrical signal is connected to the corresponding contacts of the first row of the upper and lower water level setting conversion switch through the water level control signal line. The contacts of the second row of the conversion switch except the zero level are connected together to the upper water level signal on-off amplification and the circuit that changes the voltage of the integrated circuit IC26 pin between higher than 2 / 3 of the power supply voltage and lower than 2 / 3 of the power supply voltage. The contacts of the third row of the conversion switch except the 100% level are connected together to the lower water level signal on-off amplification and the circuit that changes the voltage of the integrated circuit IC22 pin between higher than 1 / 3 of the power supply voltage and lower than 1 / 3 of the power supply voltage.

[0044] The water level height is converted into an electrical signal by the conductive part g on the movable plate (5) in the sensor and the node (x)-b on the fixed plate (1) in the sensor. The water level display circuit is composed of a current limiting resistor and a display frame of each level. The upper and lower limit water level setting conversion switch is composed of a first row of contacts, a second row of contacts, a third row of contacts and two upper and lower limit conversion buttons. The upper limit water level signal is amplified and the circuit that changes the voltage of the integrated block IC26 pin is composed of a transistor BG6, a resistor R 19 , R 20 , R 21 The circuit for amplifying the lower limit water level signal and changing the voltage on pin 22 of the integrated circuit consists of transistor BG5, resistor R 16 , R 17 , R 18 The present invention is composed of: the conductive part g on the movable plate (5) in the sensor is connected to the positive electrode of the power supply; the nodes (x)-b on the fixed plate (1) in the sensor are respectively connected to the water level display circuit of each level; the water level display circuit of each level is connected to the current limiting resistor at the node and then connected to the display frame and then to the ground; the water level control signal line of each level is connected from the node on the fixed plate (1) respectively, and then connected to the corresponding contacts in the first row of the upper and lower limit water level setting conversion switch; the contacts in the second row other than the zero level in the water level setting conversion switch are connected together to form the upper limit water level control signal line, which is connected to the base current limiting resistor R of the transistor BG6. 21 The transistor BG6 is used for signal on-off amplification, and the resistor R 19 , R 20 To make the voltage of IC26 pin produce a variable resistance; R 19 Connect to the collector of BG6 and the positive pole of the power supply, R20 Connect to the emitter of transistor BG6 and then to ground; the upper limit water level control signal line behind is connected from the emitter of transistor BG6; the contacts except the third row 100% level in the water level setting conversion switch are connected together as the lower limit water level control signal line, which is connected to the base current limiting resistor R of transistor BG5 18 On; transistor BG5 is used for signal on-off amplification, resistor R 16 , R 17 To make the voltage at pin 22 of the integrated circuit produce a variable resistance; R 16 Connect the collector of transistor BG5 to the positive pole of the power supply; R 17 After connecting to the emitter of BG5, it is grounded. The lower limit water level control signal line is connected to the emitter of BG5.

[0045] The number of sensor nodes is determined by the design, and each node must be evenly distributed. The number of levels of water level display and water level control signals is consistent with the number of nodes. The level of water level display is displayed in percentage, and water level control is also performed in percentage. The number of levels of water level setting conversion switches is consistent with the number of nodes.

[0046] All the water level control signal lines in the first row of the conversion switch can be converted into upper or lower limit water level control lines by switching the upper or lower limit conversion button; each contact of the conversion switch is rectangular, and there is only a small gap between the contacts in each row. The conductive part of the conversion button is wider, and when switching, the level to be converted is connected first and then the current level is disconnected.

[0047] The upper limit water level control signal line connected to the emitter of transistor BG6 in the first half of the circuit and the lower limit water level control signal line connected to the emitter of transistor BG5 are respectively connected to the second half of the circuit.

[0048] It should be pointed out that the water level lower limit setting function can also be omitted, and the lower limit can be fixed at one node. The method is to connect the lower limit water level control signal line of the fixed node directly to the resistor R without passing through the setting conversion switch. 18 Remove the third row of contacts and the lower limit transfer button of the setting transfer switch.

[0049] One of the control circuits using resistor powder in the sensor, the second control circuit, the third control circuit, and the control circuit using nodes in the sensor are all the same after entering the second half; the circuit in the second half includes: a manual water supply circuit, a manual water supply stop circuit, a timed automatic water supply interface circuit, a voltage generation circuit below 2 / 3 of the power supply, a voltage generation circuit below 1 / 3 of the power supply, a bistable multivibrator, a three-way drive control signal generation and amplification circuit, a tap water pressure sensor connection point, a load control circuit, and a power supply circuit; the manual water supply circuit and the timed automatic water supply interface circuit are connected to the voltage generation circuit below 1 / 3 of the power supply and then connected to the bistable multivibrator lower limit signal input terminal 2 pin; the manual water supply stop circuit is connected to the voltage generation circuit below 2 / 3 of the power supply and then connected to the bistable multivibrator upper limit signal input terminal 6 pin; the bistable multivibrator circuit is connected to the three-way drive control signal generation and amplification circuit, and then connected to the load control circuit, the drive control signal generation and amplification circuit and the load control circuit are connected to the tap water pressure sensor connection point, and the entire circuit is finally connected to the power supply circuit.

[0050] The manual water supply circuit consists of a resistor R 14 , the normally open button switch AN1, the manual water supply stop circuit consists of resistor R 13 , normally open button switch AN2, the timing automatic water supply interface circuit is composed of resistor R 15 , transistor BG4, the voltage generation circuit is lower than 2 / 3 of the power supply and consists of resistor R 11 , R 12 The circuit for generating a voltage lower than 1 / 3 of the power supply consists of resistors R9, R 10 The bistable multivibrator circuit is composed of an integrated block IC2 and a capacitor C2. The first circuit of the three-way drive control signal generation and amplification and load circuit is composed of a transistor BG3, resistors R4, R5, R6, a unidirectional thyristor SCR, a solenoid valve J, electrode lead wires a and b for controlling the solenoid valve in a tap water pressure sensor, and a light-emitting diode VD8; the second circuit is composed of a transistor BG2, resistors R3, R7, a light-emitting diode VD7, a bidirectional thyristor VS, a single-pole single-throw switch K2, an electric water pump M, and electrode lead wires c and d for controlling the electric pump in a tap water pressure sensor; the third circuit is composed of a transistor BG1, resistors R2, R8, and a light-emitting diode VD6; the power supply circuit is composed of a resistor R1, a light-emitting diode VD5, a three-terminal voltage regulator integrated block IC1, a capacitor C1, diodes VD1-VD4, a transformer T, and a switch K1.

[0051] The upper limit water level control signal line connected from the first half of the circuit is connected to the upper limit water level control signal input terminal 6 pin of the integrated block IC2. The 6 pin of the integrated block IC2 is also connected to a resistor R 13 , AN2 composed of manual water supply stop circuit, R 11、 R 12The circuit is composed of a voltage generating circuit lower than two-thirds of the power supply; R 13 One end is connected to IC26 pin, the other end is connected to normally open button switch AN2, AN2 is connected to the positive pole of the power supply; R 11 With R 12 The connection point is connected to IC26 pin, R 11 Connect to the positive pole of the power supply, R 12 Connect to the negative pole of the power supply; the lower limit water level control signal line connected from the first half of the circuit is connected to the lower limit water level control signal input terminal 2 of the integrated block IC2, and the 2nd pin of IC2 is also connected to the R 14 , AN1 composed of manual water supply circuit, R 15 , BG4 composed of timing water supply connection interface circuit, R9, R 10 The voltage generating circuit composed of the power supply is lower than 1 / 3; R 14 One end is connected to IC22 pin, and the other end is connected to normally open push button switch AN1, AN1 is grounded; resistor R 15 One end is connected to IC22 pin, the other end is connected to the collector of transistor BG4, the emitter of BG4 is grounded, and the base of BG4 is connected to the timing water supply control signal input connection point A; resistors R9, R 10 The connection point is connected to IC22 pin, resistor R9 is connected to the positive pole of the power supply, and resistor R 10 Connect to the negative pole of the power supply; R 13 After being connected, the voltage of IC2 pin 6 can be changed from less than two-thirds of the power supply voltage to more than two-thirds of the power supply voltage; R 14 , R 15After being connected to pin 2 of IC2 respectively, the voltage of pin 2 can be changed from the original voltage to less than one third of the power supply voltage. Pins 4 and 8 of the integrated block IC2 are connected to the positive pole of the power supply, pin 1 is grounded, pin 5 is connected to capacitor C2 and then grounded, and pin 3 is the output terminal of the drive control signal, which is connected to three drive control signal generation and amplification circuits; the first circuit is used to control the solenoid valve. In this circuit, the base of the drive signal amplifying transistor BG3 is connected to resistor R6, and resistor R6 is connected to pin 3 of the integrated block IC2. The collector of the transistor BG3 is connected to the solenoid valve working display light-emitting diode VD8, and VD8 is connected to the positive pole of the power supply after being connected to resistor R4; the emitter of the transistor BG3 is connected to the control pole of the unidirectional thyristor SCR; the unidirectional thyristor controls the solenoid valve, and the solenoid valve is connected to a DC power supply; the base of the transistor BG3 is also connected in parallel with resistor R5 and electrode lead wires a and b of the control solenoid valve in the tap water pressure sensor, and resistor R5 is the base current limiting resistor of BG3 when the electrode lead wires a and b are connected, and the second circuit is used to control the electric pump. In this circuit, the drive signal The base of the amplifying transistor BG2 is connected to the base current limiting resistor R7, which is then connected to the 3rd pin of the integrated circuit IC2. The collector of the transistor BG2 is connected to the light-emitting diode VD7 that displays the working status of the control circuit, and then connected to the collector current limiting resistor R3 and then connected to the power supply; the emitter of the transistor BG2 is connected to the control electrode of the bidirectional thyristor VS, and the bidirectional thyristor VS is connected in series with the electrode lead wires c and d of the control electric pump in the tap water pressure sensor, the strong pumping switch K2, and the electric pump M, and then connected to 220V AC; the electrode lead wires c and d are connected in parallel with the strong pumping switch K2; the third route is to control the high-power load standby. In this circuit, the base of the transistor BG1 is connected to the resistor R8, which is connected to the 3rd pin of the integrated circuit IC2, the collector of the transistor BG1 is connected to the light-emitting diode VD6 and then to the resistor R2 and then to the positive pole of the power supply, and the emitter of the transistor BG1 is connected to the standby equipment; the entire product circuit is connected to the power circuit.

[0052] Panel design part

[0053] like Figure 7. The entire panel is rectangular, and various devices are installed in the rectangle. The square frame (21) in the figure is the actual water level display of the water container. From bottom to top, there are eleven grids of 0, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%. The square frame (22) is used to indicate the water level, and is also divided into eleven grids of 0, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% from bottom to top. Each frame of the square frame (21) is a light-emitting diode at the bottom and glass at the top. The displayed number is written on the glass. Each frame of the square frame (22) uses a light-emitting lamp inside, and glass at the top, and the indicated number is written on the glass. The square frame (21) and the square frame (22) are the same piece of glass. The panel is also designed with an upper and lower limit water level setting conversion switch (23). The upper limit water level setting conversion button (24) and the lower limit water level setting conversion button (25) are provided. The manual water supply stop control normally open button switch (26) and the manual water supply control normally open button switch (27) are provided. The strong pumping switch (28) is provided. The solenoid valve working display light emitting diode (29). The water supply display light emitting diode (30). The standby equipment working display light emitting diode (31). The power supply display light emitting diode (32). The actual water level display grid number, the indicated water level display grid number and the conversion switch grid number are consistent. Figure 5 The circuit will not work with this panel.

[0054] Load installation part

[0055] like Figure 8 The load in this product refers to the tap water pressure sensor, electric pump, and solenoid valve.

[0056] Figure 8 In (A), a tap water pressure sensor (20) is installed in front of the tap water pipe inlet, an electric pump (18) is installed behind the tap water pressure sensor (20), and an electromagnetic valve (19) is installed in the pipe leading to the water container. Both the electric pump and the electromagnetic valve are connected to the tap water pressure sensor.

[0057] Figure 8 In (B), the tap water pressure sensor (20) is installed in the tap water inlet pipe, the electric pump (18) is installed behind the tap water pressure sensor (20), and the electromagnetic valve (19) is installed behind the electric pump (18). The electromagnetic valve (19) is not connected to the tap water pressure sensor. The electric pump (18) is connected to the tap water pressure sensor. In this installation method, the tap water pressure sensor (20) can also be removed, and only the electric pump and the electromagnetic valve are used.

[0058] Figure 8 In (C), the solenoid valve (19) is directly connected to the tap water inlet pipe.

[0059] Figure 8 In the middle (D), the electric pump (18) is connected to the water inlet pipe.

[0060] Working process

[0061] The sensor converts the change of water level height (pressure) into the change of resistance value or node, and transmits the water level change information to the control circuit through these changes, so that the control circuit works and realizes its function.

[0062] Sensor part

[0063] Water level sensor in water container, such as Figure 1 .

[0064] According to the set range, when the lower limit is zero water level, the water pressure is the minimum in this water level range. The movable plate (5) is just in contact with the fixed plate (1). When the sensor is coated with resistance powder on the fixed plate (1), the resistance values ​​at both ends a and g are the largest. The resistance values ​​of b and g are the smallest. When there are multiple nodes on the fixed plate (1), all nodes are disconnected. The sensor transmits the electrical signal generated by the water level to the control circuit, the circuit works, and water is injected. The water level gradually rises, the water pressure gradually increases, and the pressure force gradually becomes greater than the elastic force of the spring (6). Under the combined force of pressure and telescopic spring (6), the pressure transmission plate (8) moves backward, and the movable plate (5) slides backward on the fixed plate (1) through the transmission rod (7). If the fixed sheet (1) is coated with resistance powder, when electrode a and electrode g are selected to work, the resistance value transmitted by the sensor changes from large to small; when electrode b and electrode g are selected to work, the resistance value transmitted by the sensor changes from small to large; when electrode a, electrode b, and electrode g are selected to work, the resistance between end g and end a gradually decreases, and the resistance between end g and end b gradually increases. If the fixed sheet (1) is designed as a node, as the movable sheet (5) slides backward on the fixed sheet (1), the electrodes are connected step by step from front to back.

[0065] When the water level reaches the upper limit 100% level, the water pressure is the largest within this water level range, and the movable plate (5) in the sensor slides to the rearmost end of the fixed plate (1). In the water level sensor, when the fixed plate (1) is resistor powder, the resistance values ​​of a and g are the smallest, and the resistance values ​​of b and g are the largest. When the fixed plate (1) is multi-node, all nodes are connected. The sensor transmits the electrical signal generated by the change in water level to the control circuit, the circuit works, and the water stops pouring. Due to the use of water, the water level gradually drops, the water pressure gradually changes from large to small, and the pressure force gradually becomes smaller than the elastic force of the spring (6). Under the combined force of the pressure and the telescopic spring (6), the pressure transmission plate (8) moves forward, and the movable plate (5) slides forward on the fixed plate (1) through the transmission rod (7). If the fixed sheet (1) is coated with resistance powder, when electrode a and electrode g are selected to work, the resistance value transmitted by the sensor changes from small to large; when electrode b and electrode g are selected to work, the resistance value transmitted by the sensor changes from large to small; when electrode a, electrode b, and electrode g are selected to work, the resistance between end g and end a gradually increases, and the resistance between end b gradually decreases. If the fixed sheet (1) is designed with multiple nodes, as the movable sheet (5) slides forward on the fixed sheet (1), the electrodes are disconnected one by one from back to front. Until the water level drops to the lower limit zero level, the sensor is in the same state as at the beginning. When the fixed sheet (1) in the water level sensor is coated with resistance powder, its working process is similar to that of a potentiometer.

[0066] The upper and lower limits of the water level can be set through the circuit.

[0067] When the water level reaches the lower limit, the sensor repeats the above process.

[0068] Tap water pressure sensor Figure 2 .

[0069] This sensor is mainly used to control the opening and closing of the electric pump when filling water, and the opening and closing of the solenoid valve when draining water.

[0070] The conductive reed (14) is used to control the electric pump, and the conductive reed (3) is used to control the electromagnetic valve. After the sensor is installed in the pipeline, the water pressure of the tap water generates a combined force through the pressure transmission plate (8) and the spring (6), and this force causes the movable plate (5) to slide on the fixed plate (1) through the transmission rod (7). In this way, the conductive reed (14) and the conductive contact (15) and the conductive reed (3) and the conductive contact (16) can be in contact or non-contact, so that the electrode lead wires c and d or a and b form a path or open circuit. The joint circuit controls the electric pump or electromagnetic valve.

[0071] Control circuit part

[0072] One of the control circuits when using resistor powder in sensors, such as Figure 3 The water level sensor circuit diagram is as follows: Figure 1 Middle (E) part.

[0073] When the power is just turned on, there is no water in the water container. The g end of the water container water level sensor W is at the bottom, and the resistance value it transmits is the largest. The voltage generated at the in-phase input end of the operational amplifier IC3 is zero. Therefore, the voltage at the output end of IC3 is also zero. At this time, the voltages of each level in the voltage distribution circuit composed of 10 voltage regulator tubes at the output end of IC3 are also zero. The base voltage of the transistors in the display and control signal generating circuit of each level is zero. The transistors of each level are cut off, the water level display is zero, and the control signal generated is also zero. At this time, the lower limit water level control signal set by the setting switch is zero. The circuit makes the voltage of the lower limit water level control signal input terminal 2 of the integrated block IC2 equal to R9 and R 10 The generated voltage is lower than 1 / 3 of the power supply voltage. At this time, the upper limit water level control signal output is also zero. The upper limit water level control signal input terminal 6 of the integrated block IC2 is R 11 With R 12 The voltage generated is lower than 2 / 3 of the power supply voltage. Therefore, the output terminal 3 of IC2 is at a high potential. This high potential makes the transistors BG3, BG2, and BG1 saturated and turned on through the base current limiting resistors R6, R7, and R8. After BG3 is saturated and turned on, the thyristor is turned on through the control electrode of the thyristor. The solenoid valve connected to the thyristor is energized and opened. After BG2 is saturated and turned on, the thyristor is turned on through the control electrode of the thyristor. Once the thyristor is turned on, the electric pump, the tap water pressure sensor, and the strong pumping switch are connected, and the circuit starts to fill with water. The water filling process works on four installation methods of the load.

[0074] The first installation method is as follows Figure 8(A) in the middle. In this installation method, the electric pump (18) and the electromagnetic valve (19) are both connected to the tap water pressure sensor (20). The electromagnetic valve is controlled by the control circuit to be in the open state, and the control signal of the tap water pressure sensor has no effect on it. After the bidirectional thyristor in the control circuit is turned on, the opening and closing of the electric pump are controlled by the tap water pressure sensor (20). The conductive reed (14) in the tap water pressure sensor is used to control the electric pump. Its length is designed to be disconnected when the tap water pressure is just slightly higher than the water pressure of 100% of the height of the water container. If the tap water pressure is lower than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide on the conductive reed (14), and the electrode lead wires c and d become a passage, and the controlled water pump works, and the electric pump in the water container works to fill the water through the electromagnetic valve. If the water pressure of the tap water is higher than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide outside the conductive reed (14), and the electrode lead wires c and d are open circuited, and the controlled electric pump does not work. The tap water in the water container is directly supplied through the electromagnetic valve. If the water pressure is zero, since a small part of the beginning of the conductive reed (14) is removed and there is no reed, the electrode lead wires c and d are also open circuited, and the electric pump does not work. Once there is water pressure, the electric pump will randomly resume work. The strong pumping switch K2 designed in the circuit is usually disconnected. When the circuit is in the water supply state and the tap water pressure is zero, once the strong pumping switch K2 is closed, even if there is only a little water in the pipeline, the electric pump will start to pump water into the water container. When the beginning of the conductive reed (14) is intact and has a reed, the electric pump will work even if the tap water pressure is zero.

[0075] The second installation method is as follows Figure 8 (B) part. In this installation method, the tap water pressure sensor (20) is not connected to the electromagnetic valve, and a, b, and R5 in the circuit are empty. The electromagnetic valve is controlled by the control circuit to be in an open state. The electric pump (18) can be connected to the tap water pressure sensor (20) or not. When the electric pump (18) is not connected to the tap water pressure sensor (20), the tap water pressure sensor (20) can be installed in the pipeline. When the electric pump (18) is connected to the tap water pressure sensor (20), its water supply process is the same as the water supply process of the first installation method. When the electric pump (18) is not connected to the tap water pressure sensor (20), c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The electric pump is controlled by the control circuit to supply water. The start of the electric pump to supply water has nothing to do with the tap water pressure. In this installation method, the electric pump can also be used as a booster pump. When the booster pump is used, the water pressure sensor (20) is not required, c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The debugging method of the booster pump is the same as the debugging method before the controller is not used. The booster pump can also be used as a general electric pump after modification.

[0076] The third installation method is Figure 8 In the middle (C) part, only one solenoid valve (19) is installed in this installation. The solenoid valve (19) is completely controlled by the circuit to supply water. It has nothing to do with the electric pump, the tap water pressure sensor, and the strong pumping switch K2. In the circuit, a, b, and R5 are empty, and the circuit that controls the electric pump, the tap water pressure sensor, and the strong pumping switch K2 can be empty. The tap water pressure must meet the requirements for a long time. It is more suitable for water heater water level control.

[0077] The fourth installation method is Figure 8 In the middle (D) part, only the electric pump (18) is used in this installation method. The strong pump switch K2 in the circuit must be closed for a long time, and the two contacts c and d are empty. The circuit for controlling the electromagnetic valve can be empty. The electric pump is controlled by the circuit to supply water. This installation method is mainly used for well water or pond water.

[0078] The four working modes each inject water into the water container. Due to the injection of water, the water level in the water container gradually increases, the resistance generated by the water level height sensor W in the water container gradually decreases, and the voltage generated at the in-phase input terminal of the operational amplifier IC3 gradually increases. The voltage at the output terminal of IC3 also gradually increases. As the voltage increases, the voltage regulator in the voltage distribution circuit connected to the output terminal of IC3 is evenly broken down one level at a time, and the subsequent circuits are powered one level at a time. The water level display and water level control signal generation circuit are turned on one level at a time, and the water level display is displayed one level at a time from low to high according to the percentage, and the water level control signal is also generated one level at a time from low to high. In this process, the lower limit water level control stage is set to be saturated and turned on, and the lower limit water level control signal is set to be connected to the 2nd pin of IC2 through the upper and lower limit water level setting conversion switch, so that the 2nd pin of IC2 changes from less than 1 / 3 of the power supply voltage to more than 1 / 3 of the power supply voltage. After the voltage of the 2nd pin of IC2 changes, but the voltage of the 6th pin of IC2 has not changed, so the 3rd pin of IC2 still outputs a high potential, and the water container continues to be filled with water, and the water level continues to rise. Until the water level reaches the upper limit. The water level control voltage generated by the saturation of the transistor at the upper limit is added to the 6th pin of the integrated block IC2 through the upper and lower limit water level setting conversion switch, so that the voltage of the 6th pin is changed from less than 2 / 3 of the power supply voltage to more than 2 / 3 of the power supply voltage. After the 2nd pin of the integrated block IC2 is higher than 1 / 3 of the power supply voltage and the 6th pin is higher than 2 / 3 of the power supply voltage, its output pin 3 changes from high potential to low potential. At this time, the base of BG3, BG2, and BG1 is cut off at a low potential. The solenoid valve controlled by BG3 is controlled by the signal of the tap water pressure sensor when it is connected to the tap water pressure sensor; when it is not connected to the tap water pressure sensor, it is closed under the control of the control circuit. The bidirectional thyristor controlled by BG2 is also cut off. No matter what state the tap water pressure sensor and the strong pumping switch K2 are in, the electric pump is always closed, and the water container stops filling with water. When using water, the water discharge method is divided into four load installation methods.

[0079] The first installation method is as follows Figure 8 When the water is released in (A), the electric pump (18) is controlled by the circuit to be in a closed state. The electromagnetic valve (19) is not controlled by the control circuit but is instead controlled by the tap water pressure sensor (20). The length of the conductive reed (3) controlling the electromagnetic valve in the tap water pressure sensor is designed to be disconnected when the tap water pressure just reaches the bottom of the water container, that is, when the control circuit is level 0. If the tap water pressure is higher than this point, the conductive contact (16) slides outside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are open-circuited, and the BG3 is cut off through the base current limiting resistor R5 of BG3, the electromagnetic valve loses power and closes, and the water-using equipment directly uses the tap water. If the tap water pressure is lower than this design point, the conductive contact (16) slides inside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are connected, and the voltage passes through the base current limiting resistor R5 of BG3 to saturate and conduct BG3, the electromagnetic valve is powered on, and the water-using equipment uses the water in the water container. In this installation method, if the water in the water container is not used up for a long time, the main valve can be closed and the circuit will automatically use the water in the water container. After the water is used up, the main valve can be opened and the circuit will repeat the previous working process.

[0080] The second installation method is as follows Figure 8 (B). In this installation method, when draining water, no matter how the electric pump is installed, it has nothing to do with it, and the solenoid valve is also in the closed state. The water-using equipment always uses the water in the water container.

[0081] The third installation method is Figure 8 (C). The solenoid valve is controlled by the control circuit. When draining water, the solenoid valve is in a closed state, and the water-using equipment always uses the water in the water container.

[0082] The fourth installation method is Figure 8 Middle (D). When draining water, the electric pump is controlled by the circuit to stop pumping. The water-using equipment uses the water in the water container. This installation method is mainly used for well water or pond water.

[0083] R8 and BG1 are designed to control high-power motors. They can be left blank or omitted when these loads do not need to be controlled.

[0084] After using water in each of the four ways, the water level in the water container begins to drop. As the water level in the water container drops, the resistance value transmitted by the water level sensor w gradually increases, the voltage at the in-phase input of IC3 gradually decreases, and the voltage at the output of IC3 gradually decreases. The voltage regulator connected to the upper limit level in the voltage distribution circuit of the output of IC3 turns closed. As this level of voltage regulator is closed, the base of the transistor of the upper limit level is disconnected, and the transistor of the upper limit level changes from saturation to cutoff, the water level display of the upper limit level is turned off, and the upper limit control signal output is set to zero. Through the connection line, the upper limit control signal input terminal 6 of IC2 changes from higher than 2 / 3 of the power supply voltage to lower than 2 / 3 of the power supply voltage. Since the 2nd pin of IC2 is still higher than 1 / 3 of the power supply voltage at this time, the output terminal 3 of IC2 continues to be a low voltage. The water level continues to drop, and the voltage regulator in the voltage distribution circuit continues to close from high to low, the water level display and control signal output circuit are cut off, the water level display decreases by percentage, and the water level control signal also decreases, until it drops to the set lower limit, the set lower limit is disconnected, the set lower limit level is cut off, and the set lower limit control signal output becomes zero. Through the connection line, the lower limit control signal input terminal 2 of IC2 changes from higher than 1 / 3 of the power supply voltage to lower than 1 / 3 of the power supply voltage. At this time, the IC26 pin is lower than 2 / 3 of the power supply voltage, and the IC2 pin 2 is lower than 1 / 3 of the power supply voltage, then the IC2 output terminal 3 pin changes from low potential to high potential. This high potential passes through the current limiting resistors R6, R7, and R8 to saturate and conduct the transistors BG3, BG2, and BG1, and the load works. The water container is filled with water like before the start. Thus, the circuit will continuously repeat the above working process.

[0085] The second control circuit when using resistor powder in the sensor, such as Figure 4 , the water level sensor circuit diagram is as follows Figure 1 Middle (E) part.

[0086] When the power is just turned on, there is no water in the water container. The g end of the water level sensor W is at the bottom, and the resistance value it transmits is the largest. The voltage generated at the in-phase input end of the operational amplifier IC4 is zero, so the voltage at the output end of IC4 is also zero. This voltage passes through the impedance matching resistor R 24 , R 25 Added to the level input terminal 5 pin of the level indicator integrated block IC3. At zero voltage, all outputs of the integrated block IC3 are high level, the water level display LED is reverse biased and has no display, and the water level control signal output is also all high level. This high level is added to the base of the lower limit water level signal switch amplifier transistor BG5 through the lower limit setting level of the water level setting conversion switch, so that BG5 is reverse biased and cut off. In this way, the collector voltage of BG5 is zero, and the lower limit water level control input terminal of the integrated block IC2 is R9, R 10The voltage generated is lower than one third of the power supply. In terms of the upper limit of the water level, the high level output by the collector block IC3 is added to the base of the upper limit water level signal switch amplifier transistor BG6 through the water level setting conversion switch, so that BG6 is reverse biased and cut off, so that the collector voltage of BG6 is zero. Through the control circuit, the upper limit water level control input terminal 6 of the integrated block IC2 is R 11 , R 12 The voltage generated is lower than two-thirds of the power supply. This voltage between pin 22 and pin 6 of the integrated block IC makes its output pin 3 high level. This high level passes through the base current limiting resistors R6, R7, and R8 to saturate and conduct the transistors BG3, BG2, and BG1. After BG3 is saturated and conducted, the control electrode of the thyristor is used to conduct the thyristor. The solenoid valve connected to the thyristor is powered on. After BG2 is saturated and conducted, the control electrode of the thyristor is used to conduct the bidirectional thyristor. Once the bidirectional thyristor is turned on, the electric pump, the tap water pressure sensor, and the strong pumping switch are connected, and the circuit starts to fill with water. The water filling process is divided into four installation methods for the load.

[0087] The first installation method is as follows Figure 8 (A) in the middle. In this installation method, the electric pump (18) and the electromagnetic valve (19) are both connected to the tap water pressure sensor (20). The electromagnetic valve is controlled by the control circuit to be in the open state, and the control signal of the tap water pressure sensor has no effect on it. After the bidirectional thyristor in the control circuit is turned on, the opening and closing of the electric pump are controlled by the tap water pressure sensor (20). The conductive reed (14) in the tap water pressure sensor is used to control the electric pump. Its length is designed to be disconnected when the tap water pressure is just a little higher than the water pressure of 100% of the height of the water container. If the tap water pressure is lower than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide on the conductive reed (14), and the electrode lead wires c and d become a passage, and the controlled electric pump works, and the electric pump in the water container works to fill the water through the electromagnetic valve. If the water pressure of the tap water is higher than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide outside the conductive reed (14), and the electrode lead wires c and d are open circuited, and the controlled electric pump does not work. The tap water in the water container is directly supplied through the electromagnetic valve. If the water pressure is zero, since a small part of the beginning of the conductive reed (14) is removed and there is no reed, the electrode lead wires c and d are also open circuited, and the water pump does not work. Once there is water pressure, the water pump will randomly resume work. The strong pumping switch K2 designed in the circuit is usually disconnected. When the circuit is in the water supply state and the tap water pressure is zero, once the strong pumping switch K2 is closed, even if there is only a little water in the pipeline, the electric pump will be started to pump water into the water container. When the beginning of the conductive reed (14) is intact and has a reed, the water pump will work even if the tap water pressure is zero.

[0088] The second installation method is as follows Figure 8(B) part. In this installation method, the tap water pressure sensor (20) is not connected to the electromagnetic valve, and a, b, and R5 in the circuit are empty. The electromagnetic valve is controlled by the control circuit to be in an open state. The electric pump (18) can be connected to the tap water pressure sensor (20) or not. When the electric pump (18) is not connected to the tap water pressure sensor (20), the tap water pressure sensor (20) can be installed in the pipeline. When the electric pump (18) is connected to the tap water pressure sensor (20), its water supply process is the same as the water supply process of the first installation method. When the electric pump (18) is not connected to the tap water pressure sensor (20), c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The electric pump is controlled by the control circuit to supply water. The start of the electric pump to supply water has nothing to do with the tap water pressure. In this installation method, the electric pump can also be used as a booster pump. When the booster pump is used, the water pressure sensor (20) is not required, c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The debugging method of the booster pump is the same as the debugging method before the controller is not used. The booster pump can also be used as a general electric pump after modification.

[0089] The third installation method is Figure 8 In the middle (C) part, only one solenoid valve (19) is installed in this installation. The solenoid valve (19) is completely controlled by the circuit to supply water. It has nothing to do with the electric pump, the tap water pressure sensor, and the strong pumping switch K2. In the circuit, a, b, and R5 are empty, and the circuit that controls the electric pump, the tap water pressure sensor, and the strong pumping switch K2 can be empty. The tap water pressure must meet the requirements for a long time. It is more suitable for water heater water level control.

[0090] The fourth installation method is Figure 8 In the middle (D) part, only the electric pump (18) is used in this installation method. The strong pump switch K2 in the circuit must be closed for a long time, and the two contacts c and d are empty. The circuit for controlling the electromagnetic valve can be empty. The electric pump is controlled by the circuit to supply water. This installation method is mainly used for well water or pond water.

[0091] The four working modes each inject water into the water container. Due to the injection of water, the water level in the water container gradually increases, the resistance generated by the water level sensor W in the water container gradually changes from large to small, the voltage generated at the in-phase input end of the operational amplifier IC4 gradually increases, and the voltage at the output end of IC4 also gradually increases. The gradually increasing voltage passes through the impedance matching resistor R 24 , R 25Added to the level input terminal 5 of the level indicating integrated circuit IC3, the output terminals 1, 18, 17, 16, 15, and 14 of IC3 change from high level to low level one by one from front to back as the voltage of the level input terminal 5 increases. At the beginning, the lower limit level is set from high level to low level, and this change level is added to the base of the lower limit signal switch amplifier transistor BG5 by setting the lower limit setting conversion button of the conversion switch. BG5 is saturated and turned on, and the collector of BG5 outputs a high voltage. This voltage passes through the circuit to make the 2nd pin of the integrated block IC2 change from lower than 1 / 3 of the power supply voltage to higher than 1 / 3 of the power supply voltage. At this time, the 6th pin of IC2 is still lower than 2 / 3 of the power supply voltage, so the 3rd pin of the output terminal of IC2 continues to be high level, and the circuit is still filled with water in various ways as mentioned above. The water level continues to rise, the resistance transmitted by the sensor continues to decrease, the voltage of the in-phase input terminal of IC4 continues to increase, and the voltage output by IC4 increases accordingly, and the level added to the input terminal 5 of IC3 continues to increase. The output terminals 1, 18, 17, 16, 15, and 14 of IC3 change from high level to low level step by step, and the water level continues to be displayed step by step according to the percentage. The water level control signal continues to be generated step by step according to the percentage until the upper limit level is set. After the upper limit level is set, the upper limit water level signal is added to the base of the upper limit water level signal switch amplifier transistor BG6 through the water level setting conversion switch, so that BG6 is saturated and turned on. The voltage generated by the collector of BG6 can change the IC26 pin from less than 2 / 3 of the power supply voltage to higher than 2 / 3 of the power supply voltage. At this time, the 2nd pin of IC2 is higher than 1 / 3 of the power supply voltage. After the voltage of the IC26 pin becomes higher than 2 / 3 of the power supply voltage, the output terminal 3 of IC2 changes from high level to low level. At this time, the bases of BG3, BG2, and BG1 are cut off at a low potential. The solenoid valve controlled by BG3 is controlled by the signal of the tap water pressure sensor when it is connected to the tap water pressure sensor; when it is not connected to the tap water pressure sensor, it is closed under the control of the control circuit. The bidirectional thyristor controlled by BG2 is also cut off. No matter what state the tap water pressure sensor and the strong pumping switch K2 are in, the electric pump is always closed, and the water container stops filling with water. When using water, the water discharge method is carried out according to the four installation methods of load.

[0092] The first installation method is as follows Figure 8When the water is released in (A), the electric pump (18) is controlled by the circuit to be in a closed state. The electromagnetic valve (19) is not controlled by the control circuit but is instead controlled by the tap water pressure sensor (20). The length of the conductive reed (3) controlling the electromagnetic valve in the tap water pressure sensor is designed to be disconnected when the tap water pressure just reaches the bottom of the water container, that is, when the control circuit is level 0. If the tap water pressure is higher than this point, the conductive contact (16) slides outside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are open-circuited, and the BG3 is cut off through the base current limiting resistor R5 of BG3, the electromagnetic valve loses power and closes, and the water-using equipment directly uses the tap water. If the tap water pressure is lower than this design point, the conductive contact (16) slides inside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are connected, and the voltage passes through the base current limiting resistor R5 of BG3 to saturate and conduct BG3, the electromagnetic valve is powered on, and the water-using equipment uses the water in the water container. In this installation method, if the water in the water container is not used up for a long time, the main valve can be closed and the circuit will automatically use the water in the water container. After the water is used up, the main valve can be opened and the circuit will repeat the previous working process.

[0093] The second installation method is as follows Figure 8 (B). In this installation method, when draining water, no matter how the electric pump is installed, it has nothing to do with it, and the solenoid valve is also in the closed state. The water-using equipment always uses the water in the water container.

[0094] The third installation method is Figure 8 (C). The solenoid valve is controlled by the control circuit. When draining water, the solenoid valve is in a closed state, and the water-using equipment always uses the water in the water container.

[0095] The fourth installation method is Figure 8 Middle (D). When draining water, the electric pump is controlled by the circuit to stop pumping. The water-using equipment uses the water in the water container. This installation method is mainly used for well water or pond water.

[0096] R8 and BG1 are designed to control AC contactors and high-power motors. They can be left blank or omitted when these loads do not need to be controlled.

[0097] After the four methods of using water, the water level in the water container begins to drop. As the water level drops, the resistance value transmitted by the water level sensor W gradually increases. The voltage at the in-phase input of IC4 decreases, and the voltage at the output of IC4 gradually decreases. The gradually decreasing voltage is added to the level input terminal 5 of IC3 through the impedance matching resistor. This change in the level of pin 5 causes the output terminals 1, 18, 17, 16, 15, and 14 of IC3 to change from low level to high level step by step from high to low. The first to change is the upper limit level. After the upper limit level is changed from low level to high level, the upper limit water level display disappears, and the water level control signal output is high level. This high level is added to the base of the upper limit water level signal switch amplifying transistor BG6 through the water level setting conversion switch, causing the base of BG6 to be reverse biased and cut off. After BG6 is cut off, the voltage at its collector becomes zero. The upper limit water level control signal input terminal 6 of the integrated block IC2 changes from a voltage higher than 2 / 3 of the power supply to R 11 , R 12 The voltage generated is lower than 2 / 3 of the power supply voltage. Since the 2nd pin of IC2 is still higher than 1 / 3 of the power supply voltage at this time, the 3rd pin of the output terminal of IC2 continues to be low level. The circuit still stops supplying water.

[0098] The water level in the water container continues to drop, the resistance of the water level sensor in the water container continues to increase, the voltage at the in-phase input of IC4 continues to decrease, and the voltage at the output of IC4 continues to decrease. The voltage at the level input terminal 5 of IC3 also continues to decrease, and the output terminals 1, 18, 17, 16, 15, and 14 of IC3 continue to change from low level to high level step by step, the water level display is turned off step by step from high to low, and the water level control signal changes step by step from high to low until the lower limit is set. After reaching the lower limit, the lower limit is set from low potential to high potential, the water level display is turned off, and the control signal for setting the lower limit is added to the base of the lower limit water level signal switch amplifying transistor BG5 through the water level setting conversion switch, causing the reverse bias of BG5 to change from saturation to cutoff, and the collector voltage of BG5 becomes zero. This voltage causes the lower limit water level control signal input terminal 2 of IC2 to change from a voltage higher than 1 / 3 of the power supply to R9, R 10 The voltage generated is lower than 1 / 3 of the power supply voltage. Since the IC26 pin is lower than 2 / 3 of the power supply voltage, the output of IC2 changes from low level to high level. This high level passes through the current limiting resistors R6, R7, and R8 to saturate and conduct the transistors BG3, BG2, and BG1, and the load works. The water container is filled with water like before the start. The circuit will repeat the above working process continuously.

[0099] The third control circuit when using resistor powder in the sensor, such as Figure 5 , the water level sensor circuit diagram is as follows Figure 1 Middle (E) part.

[0100] When the power is just turned on, there is no water in the water container. The g end of the water level sensor W is at the bottom, and the resistance value it transmits is the largest. 7-2 The voltage generated at the non-inverting input of the IC is zero. 7-2 The output voltage of the circuit also becomes zero. The voltage generated by the actual water level is used by the digital tube display circuit to display the actual water level. At this time, it is zero voltage, and the displayed number is zero. On the other hand, the lower limit setting water level signal is added to the amplifier IC to compare the actual water level signal. 3-2 On the other hand, an amplifier IC is added to compare the upper limit water level signal with the actual water level signal. 3-1 The inverting input terminal.

[0101] In terms of lower limit water level setting, adjusting potentiometer W2 will produce a changing resistance value at both ends of potentiometer W2. This resistance value is related to resistor R 46 , R 45 Operational amplifier integrated circuit IC at the lower limit given value 7-3 The non-inverting input terminal generates a changing voltage, which is amplified in the IC 7-3 The output end of the IC generates an amplified voltage, which is displayed as a percentage by the digital display circuit. You can set the desired water level lower limit according to the number displayed by the digital display circuit. 7-3 The voltage generated at the output end is applied to the water level lower limit comparison amplifier IC 3-2 In any case, the voltage generated by the actual water level at the beginning of water filling is always less than or equal to the given value voltage of the lower limit water level setting. 3-2 The output of IC is zero or negative. 3-2 The voltage output at the output end is passed through the current limiting resistor R 18 The lower limit water level signal switch amplifier transistor BG5 is cut off, and the collector resistor R 16 is disconnected, the resistor R 17 is connected. 17 After being connected, it is connected with R9, R 10 The voltage of pin 2 of IC2 is lower than 1 / 3 of the power supply voltage.

[0102] In terms of upper water level setting, adjusting the potentiometer W1 will produce a changing resistance value at both ends of W1. This resistance value is related to the resistor R 32 , R 31 At a given value operational amplifier IC 7-1 The non-inverting input of the IC produces a changing voltage. 7-1The output terminal of the IC also produces a changing voltage, which is displayed as a percentage on the digital display circuit. Determine the desired upper water level according to the number displayed on the display circuit. After selecting the upper water level, the IC 7-1 The given value output at the output end is added to the upper limit setting water level signal and compared with the actual water level signal amplifier IC 3-1 The voltage generated by the actual water level is always less than the upper limit setting value. 3-1 The output end always outputs a high potential, and this high potential is passed through the base current limiting resistor R 21 The upper limit water level signal control line connected to the collector of BG6 generates a low potential, which is connected to R 11 , R 12 The generated voltage is matched to make the 6th pin of IC2 lower than 2 / 3 of the power supply voltage.

[0103] The upper and lower limits of the water level can be set by the upper limit setting circuit and the lower limit setting circuit. When setting, the upper limit cannot be set to zero, the lower limit cannot be set to 100%, and the upper limit setting number must be above the lower limit setting number.

[0104] Since the 2nd pin of IC2 is lower than 1 / 3 of the power supply voltage, and the 6th pin of IC2 is lower than 2 / 3 of the power supply voltage, the 3rd pin of the output terminal of IC2 outputs a high potential. This high potential makes the transistors BG3, BG2, and BG1 saturated and turned on through the base current limiting resistors R6, R7, and R8. After BG3 is saturated and turned on, the thyristor is turned on through the control electrode of the thyristor. The solenoid valve connected to the thyristor is powered on. After BG2 is saturated and turned on, the thyristor is turned on through the control electrode of the thyristor. Once the thyristor is turned on, the electric pump, the tap water pressure sensor, and the strong pumping switch are connected, and the circuit starts to fill with water. The water filling process works on four installation methods of the load.

[0105] The first installation method is as follows Figure 8(A) in the middle. In this installation method, the electric pump (18) and the electromagnetic valve (19) are both connected to the tap water pressure sensor (20). The electromagnetic valve is controlled by the control circuit to be in the open state, and the control signal of the tap water pressure sensor has no effect on it. After the bidirectional thyristor in the control circuit is turned on, the opening and closing of the electric pump are controlled by the tap water pressure sensor (20). The conductive reed (14) in the tap water pressure sensor is used to control the electric pump. Its length is designed to be disconnected when the tap water pressure is just a little higher than the water pressure of 100% of the height of the water container. If the tap water pressure is lower than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide on the conductive reed (14), and the electrode lead wires c and d become a passage, and the controlled electric pump works, and the electric pump in the water container works to fill the water through the electromagnetic valve. If the water pressure of the tap water is higher than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide outside the conductive reed (14), and the electrode lead wires c and d are open circuited, and the controlled electric pump does not work. The tap water in the water container is directly supplied through the electromagnetic valve. If the water pressure is zero, since a small part of the beginning of the conductive reed (14) is removed and there is no reed, the electrode lead wires c and d are also open circuited, and the electric pump does not work. Once there is water pressure, the electric pump will randomly resume work. The strong pumping switch K2 designed in the circuit is usually disconnected. When the circuit is in the water supply state and the tap water pressure is zero, once the strong pumping switch K2 is closed, even if there is only a little water in the pipeline, the electric pump will start to pump water into the water container. When the beginning of the conductive reed (14) is intact and has a reed, the electric pump will work even if the tap water pressure is zero.

[0106] The second installation method is as follows Figure 8 (B) part. In this installation method, the tap water pressure sensor (20) is not connected to the electromagnetic valve, and a, b, and R5 in the circuit are empty. The electromagnetic valve is controlled by the control circuit to be in an open state. The electric pump (18) can be connected to the tap water pressure sensor (20) or not. When the electric pump (18) is not connected to the tap water pressure sensor (20), the tap water pressure sensor (20) can be installed in the pipeline. When the electric pump (18) is connected to the tap water pressure sensor (20), its water supply process is the same as the water supply process of the first installation method. When the electric pump (18) is not connected to the tap water pressure sensor (20), c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The electric pump is controlled by the control circuit to supply water. The start of the electric pump to supply water has nothing to do with the tap water pressure. In this installation method, the electric pump can also be used as a booster pump. When the booster pump is used, the water pressure sensor (20) is not required, c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The debugging method of the booster pump is the same as the debugging method before the controller is not used. The booster pump can also be used as a general electric pump after modification.

[0107] The third installation method is Figure 8 In the middle (C) part, only one solenoid valve (19) is installed in this installation. The solenoid valve (19) is completely controlled by the circuit to supply water. It has nothing to do with the electric pump, the tap water pressure sensor, and the strong pumping switch K2. In the circuit, a, b, and R5 are empty, and the circuit that controls the electric pump, the tap water pressure sensor, and the strong pumping switch K2 can be empty. The tap water pressure must meet the requirements for a long time. It is more suitable for water heater water level control.

[0108] The fourth installation method is Figure 8 In the middle (D) part, only the electric pump (18) is used in this installation method. The strong pump switch K2 in the circuit must be closed for a long time. The two contacts c and d are empty. The circuit for controlling the electromagnetic valve can be empty. The electric pump is controlled by the circuit to fill water. This installation method is mainly used for well water or pond water.

[0109] The four working modes each inject water into the water container. Due to the injection of water, the water level in the water container gradually increases, and the output resistance of the water level height sensor W in the water container gradually decreases. 7-2 The voltage at the non-inverting input terminal of IC 7-2 The voltage at the output end of the circuit also gradually increases. The gradually increasing voltage is displayed as a percentage in the actual water level display circuit, and the displayed number gradually increases as the water level rises. On the other hand, the lower limit setting water level signal is added to the amplifier IC to compare the actual water level signal. 3-2 On the other hand, an amplifier IC is added to compare the upper limit water level signal with the actual water level signal. 3-1 The actual water level increases, making the actual water level signal amplifier IC 7-2 The output voltage gradually increases. In terms of comparing and amplifying the lower limit setting water level signal and the actual water level signal, the comparator IC 3-2 The actual water level voltage input terminal voltage gradually increases until it is greater than the lower limit setting given value input terminal voltage, the comparator IC 3-2 The output terminal outputs a high level, and this high level passes through the base current limiting resistor R 18 Then the transistor BG5 is saturated and turned on. After BG5 is saturated and turned on, the collector resistance R 16 , emitter resistance R 17 The lower limit water level control signal connected to the emitter of BG5 becomes a high potential, and this high potential is connected to R9 and R 10 The potential generated matches the voltage of pin 2 of IC2, which changes from one-third lower than the power supply voltage to one-third higher than the power supply voltage. In terms of comparing and amplifying the upper limit setting water level signal with the actual water level signal, the comparator IC 3-1 The actual water level voltage input voltage is still less than the upper water level setting given value voltage. 3-1The output terminal still outputs a high potential, and this high potential makes BG6, R 19 , R 20 , R 21 The 6th pin of IC2 remains unchanged. The 6th pin of IC2 continues to be lower than two-thirds of the power supply voltage. The 2nd pin of IC2 becomes higher than 1 / 3 of the power supply voltage, but the 6th pin is still lower than two-thirds of the power supply voltage, so its output pin 3 continues to maintain a high potential. The circuit continues to fill water in the previous ways. As the water level continues to rise, the resistance value of sensor W continues to decrease, and the actual water level signal amplifier circuit IC 7-2 The output voltage continues to increase, and the number displayed by the actual water level display circuit continues to increase until the upper limit is set. At this time, the voltage generated by the actual water level is exactly equal to the given value of the upper limit setting, and the comparison amplifier IC 3-1 The voltage at the non-inverting input terminal and the inverting input terminal of IC 3-1 The output voltage is zero, through the base limiting current resistor R 21 Make transistor BG6 change from saturation to cut-off, emitter resistor R 20 is disconnected, the collector resistance R 19 The upper limit water level control signal input terminal 6 of IC2 is connected, so that the voltage of IC2's 6th pin changes from less than two-thirds of the power supply voltage to more than two-thirds of the power supply voltage. Since the voltage of IC2's 2nd pin is higher than one-third of the power supply voltage, this change in the voltage of IC2's 6th pin causes the output terminal 3 of IC2 to become low level. At this time, the bases of BG3, BG2, and BG1 are cut off at a low potential. The solenoid valve controlled by BG3 is controlled by the signal of the tap water pressure sensor when it is connected to the tap water pressure sensor; when it is not connected to the tap water pressure sensor, it is closed under the control of the control circuit. The bidirectional thyristor controlled by BG2 is also cut off. No matter what state the tap water pressure sensor and the strong pump switch K2 are in, the electric pump is always closed, and the water container stops filling with water. When using water, the water discharge method is divided into four installation methods of load.

[0110] The first installation method is as follows Figure 8When the water is released in (A), the electric pump (18) is controlled by the circuit to be in a closed state. The electromagnetic valve (19) is not controlled by the control circuit but is instead controlled by the tap water pressure sensor (20). The length of the conductive reed (3) controlling the electromagnetic valve in the tap water pressure sensor is designed to be disconnected when the tap water pressure just reaches the bottom of the water container, that is, when the control circuit is level 0. If the tap water pressure is higher than this point, the conductive contact (16) slides outside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are open-circuited, and the BG3 is cut off through the base current limiting resistor R5 of BG3, the electromagnetic valve loses power and closes, and the water-using equipment directly uses the tap water. If the tap water pressure is lower than this design point, the conductive contact (16) slides inside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are connected, and the voltage passes through the base current limiting resistor R5 of BG3 to saturate and conduct BG3, the electromagnetic valve is powered on, and the water-using equipment uses the water in the water container. In this installation method, if the water in the water container is not used up for a long time, the main valve can be closed and the circuit will automatically use the water in the water container. After the water is used up, the main valve can be opened and the circuit will repeat the previous working process.

[0111] The second installation method is as follows Figure 8 (B). In this installation method, when draining water, no matter how the electric pump is installed, it has nothing to do with it, and the solenoid valve is also in the closed state. The water-using equipment always uses the water in the water container.

[0112] The third installation method is Figure 8 (C). The solenoid valve is controlled by the control circuit. When draining water, the solenoid valve is in a closed state, and the water-using equipment always uses the water in the water container.

[0113] The fourth installation method is Figure 8 Middle (D). When draining water, the electric pump is controlled by the circuit to stop pumping. The water-using equipment uses the water in the water container. This installation method is mainly used for well water or pond water.

[0114] R8 and BG1 are designed to control high-power loads. They can be left blank or omitted when these loads do not need to be controlled.

[0115] After the four methods of water use, the water level in the water container begins to drop. As the water level drops, the resistance value transmitted by the water level sensor W gradually increases. 7-2 The voltage value of the non-inverting input terminal gradually decreases, and the IC 7-2 The voltage at the output terminal of the IC 7-2 The displayed digits in the digital display circuit of the digital tube at the output end of the circuit also become smaller. 3-1 The actual water level voltage is lower than the upper limit voltage, and the comparator IC 3-1The output terminal outputs a high level, and this high level passes through the base current limiting resistor R 21 Make transistor BG6 saturated and turned on. 19 , R 20 Both resistors are connected to the circuit. At this time, the upper water level control signal connected to the collector of BG6 makes the 6th pin of the integrated circuit IC2 change from higher than 2 / 3 of the power supply voltage to lower than 2 / 3 of the power supply voltage. When the water level starts to drop, IC 7-2 The output voltage of the output terminal is at the lower limit of the comparator IC 3-2 No effect, lower limit comparator IC 3-2 , the lower limit water level signal switch amplifier transistor BG5 maintains its original state. IC2's pin 2 is still higher than 1 / 3 of the power supply voltage. The voltage at IC2's pin 6 and pin 2 makes IC2's output pin 3 continue to be low level, and the circuit still stops filling water. The water level continues to drop, and the resistance of sensor W continues to increase. 7-2 The voltage at the non-inverting input terminal of IC 7-2 The voltage at the output end of the circuit also continues to decrease, and the actual water level display number connected to the output end also continues to decrease until the lower limit is set. At this time, the lower limit comparator IC 3-2 The actual water level voltage at the non-inverting input terminal is equal to the lower limit given value voltage at the inverting input terminal. 3-2 The output end is zero. The lower limit signal switch amplifier transistor BG5 is cut off, and the collector resistance R 16 The lower limit water level control signal connected to the emitter of BG5 makes the 2nd pin of IC2 change from higher than 1 / 3 of the power supply voltage to lower than 1 / 3 of the power supply voltage. At this time, the 6th pin of IC2 is lower than 2 / 3 of the power supply voltage. After the voltage of the 2nd pin of IC2 changes, the 3rd pin of IC2 outputs a high potential. This high potential passes through the current limiting resistors R6, R7, and R8 to saturate and conduct the transistors BG3, BG2, and BG1. The load works and the water container is filled with water like the starting state. Thus, the circuit will continuously repeat the above working process.

[0116] The upper and lower limits of the water level can be set and displayed by adjusting the potentiometers W1 and W2.

[0117] The control circuit using multiple nodes in the sensor, such as Figure 6 , the water level sensor circuit diagram is as follows Figure 1 Middle (F) part.

[0118] When the power is turned on, there is no water in the water container. The conductive part g of the movable plate in the water container water level sensor does not contact the nodes in the fixed plate. The circuit between g and the nodes is open, the water level is not displayed, and the control signals of each level are not output. The base voltage of the lower limit control signal switch amplifier transistor BG5 added to the lower limit control signal switch through the water level upper and lower limit setting switch is zero. BG5 is in the cut-off state. The lower limit water level control input terminal 2 of the integrated block IC2 connected to the emitter of BG5 is R9, R 10 The generated voltage is lower than 1 / 3 of the power supply voltage. At this time, the upper limit water level control signal is also zero, and the base voltage of the upper limit control signal switch amplifier transistor BG6 is zero, and BG6 is in the cut-off state. The upper limit water level control signal input terminal 6 of IC2 connected to the emitter of BG6 is R 11 With R 12 The voltage generated is lower than 2 / 3 of the power supply voltage. Therefore, the output terminal 3 of IC2 outputs a high potential. This high potential makes the transistors BG3, BG2, and BG1 saturated and turned on through the base current limiting resistors R6, R7, and R8. After BG3 is saturated and turned on, the thyristor is turned on through the control electrode of the thyristor. The solenoid valve connected to the thyristor is energized and opened. After BG2 is saturated and turned on, the thyristor is turned on through the control electrode of the thyristor. Once the thyristor is turned on, the electric pump, the tap water pressure sensor, and the strong pumping switch are connected, and the circuit starts to fill with water. The water filling process works on four installation methods of the load.

[0119] The first installation method is as follows Figure 8(A) in the middle. In this installation method, the electric pump (18) and the electromagnetic valve (19) are both connected to the tap water pressure sensor (20). The electromagnetic valve is controlled by the control circuit to be in the open state, and the control signal of the tap water pressure sensor has no effect on it. After the bidirectional thyristor in the control circuit is turned on, the opening and closing of the electric pump are controlled by the tap water pressure sensor (20). The conductive reed (14) in the tap water pressure sensor is used to control the electric pump. Its length is designed to be disconnected when the tap water pressure is just a little higher than the water pressure of 100% of the height of the water container. If the tap water pressure is lower than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide on the conductive reed (14), and the electrode lead wires c and d become a passage, and the controlled electric pump works, and the electric pump in the water container works to fill the water through the electromagnetic valve. If the water pressure of the tap water is higher than this point, the water pressure and the elastic force of the spring (6) cause the conductive contact (15) on the movable sheet (5) to slide outside the conductive reed (14), and the electrode lead wires c and d are open circuited, and the controlled electric pump does not work. The tap water in the water container is directly supplied through the electromagnetic valve. If the water pressure is zero, since a small part of the beginning of the conductive reed (14) is removed and there is no reed, the electrode lead wires c and d are also open circuited, and the electric pump does not work. Once there is water pressure, the electric pump will randomly resume work. The strong pumping switch K2 designed in the circuit is usually disconnected. When the circuit is in the water supply state and the tap water pressure is zero, once the strong pumping switch K2 is closed, even if there is only a little water in the pipeline, the electric pump will start to pump water into the water container. When the beginning of the conductive reed (14) is intact and has a reed, the electric pump will work even if the tap water pressure is zero.

[0120] The second installation method is as follows Figure 8 (B) part. In this installation method, the tap water pressure sensor (20) is not connected to the electromagnetic valve, and a, b, and R5 in the circuit are empty. The electromagnetic valve is controlled by the control circuit to be in an open state. The electric pump (18) can be connected to the tap water pressure sensor (20) or not. When the electric pump (18) is not connected to the tap water pressure sensor (20), the tap water pressure sensor (20) can be installed in the pipeline. When the electric pump (18) is connected to the tap water pressure sensor (20), its water supply process is the same as the water supply process of the first installation method. When the electric pump (18) is not connected to the tap water pressure sensor (20), c and d in the circuit are empty, the forced pump switch K2 must be closed for a long time, and the electric pump is controlled by the control circuit to supply water. The start of the electric pump to supply water has nothing to do with the tap water pressure. In this installation method, the electric pump can also be used as a booster pump. When the booster pump is used, the water pressure sensor (20) is not required, c and d in the circuit are empty, and the strong pumping switch K2 must be closed for a long time. The debugging method of the booster pump is the same as the debugging method before the controller is not used. The booster pump can also be used as a general electric pump after modification.

[0121] The third installation method is Figure 8 In the middle (C) part, only one solenoid valve (19) is installed in this installation. The solenoid valve (19) is completely controlled by the circuit to supply water. It has nothing to do with the electric pump, the tap water pressure sensor, and the strong pumping switch K2. In the circuit, a, b, and R5 are empty, and the circuit that controls the electric pump, the tap water pressure sensor, and the strong pumping switch K2 can be empty. The tap water pressure must meet the requirements for a long time. It is more suitable for water heater water level control.

[0122] The fourth installation method is Figure 8 In the middle (D) part, only the electric pump (18) is used in this installation method. The strong pump switch K2 in the circuit must be closed for a long time, and the two contacts c and d are empty. The circuit for controlling the electromagnetic valve can be empty. The electric pump is controlled by the circuit to supply water. This installation method is mainly used for well water or pond water.

[0123] Each of the four working modes injects water into the water container. Due to the injection of water, the water level in the water container gradually increases, and the conductive part g of the movable plate in the water level height sensor in the water container is gradually connected to each node in the fixed plate from front to back. The water level display circuit and the control signal output circuit are energized from front to back, and the water level is displayed step by step in percentage. The water level control signal is also generated step by step. In this process, the lower limit level is also energized, and the lower limit signal amplifying transistor BG5 is saturated and turned on. After BG5 is saturated and turned on, its collector and emitter resistors R 16 , R 17 The generated voltage is applied to the lower limit water level control signal input terminal pin 2 of IC2 through the circuit, so that the voltage of pin 2 changes from less than 1 / 3 of the power supply voltage to more than 1 / 3 of the power supply voltage. Since pin 6 of IC2 is still lower than 2 / 3 of the power supply voltage at this time, pin 3 of the output terminal of IC2 is still at a high potential, and the control circuit continues to add water. The water level in the water container continues to rise, the conductive part g of the movable sheet of the water level height sensor in the water container continues to move backward, the node on the fixed sheet continues to be connected backward, the water level display continues to display upward, and the water level control signal continues to be generated upward until the upper limit level is set. The water level control signal generated after the upper limit level is powered on is added to the base of the upper limit control signal switch amplifying transistor BG6 through the water level upper and lower limit setting conversion switch, and BG6 obtains the base voltage saturation and conduction. Between its collector and emitter resistors R 19 , R 20The generated voltage is added to the upper water level control signal input terminal 6 of IC2 through the circuit, so that the voltage of the 6th pin changes from lower than 2 / 3 of the power supply voltage to higher than 2 / 3 of the power supply voltage. Since the 2nd pin of IC2 is higher than 1 / 3 of the power supply voltage at this time, once the voltage of the 6th pin changes, the output terminal 3th pin of IC2 changes from high potential to low potential. At this time, the base of BG3, BG2, and BG1 is cut off at a low potential. When the solenoid valve controlled by BG3 is connected to the tap water pressure sensor, it is controlled by the signal of the tap water pressure sensor; when it is not connected to the tap water pressure sensor, it is closed by the control circuit. The bidirectional thyristor controlled by BG2 is also cut off. No matter what state the tap water pressure sensor and the strong pump switch K2 are in, the electric pump is always closed, and the water container stops filling with water. When using water, the water discharge method is divided into four load installation methods.

[0124] The first installation method is as follows Figure 8 When the water is released in (A), the electric pump (18) is controlled by the circuit to be in a closed state. The electromagnetic valve (19) is not controlled by the control circuit but is instead controlled by the tap water pressure sensor (20). The length of the conductive reed (3) controlling the electromagnetic valve in the tap water pressure sensor is designed to be disconnected when the tap water pressure just reaches the bottom of the water container, that is, when the control circuit is level 0. If the tap water pressure is higher than this point, the conductive contact (16) slides outside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are open-circuited, and the BG3 is cut off through the base current limiting resistor R5 of BG3, the electromagnetic valve loses power and closes, and the water-using equipment directly uses the tap water. If the tap water pressure is lower than this design point, the conductive contact (16) slides inside the conductive reed (3), and the two electrode lead wires a and b of the control electromagnetic valve are connected, and the voltage passes through the base current limiting resistor R5 of BG3 to saturate and conduct BG3, the electromagnetic valve is powered on, and the water-using equipment uses the water in the water container. In this installation method, if the water in the water container is not used up for a long time, the main valve can be closed and the circuit will automatically use the water in the water container. After the water is used up, the main valve can be opened and the circuit will repeat the previous working process.

[0125] The second installation method is as follows Figure 8 (B). In this installation method, when draining water, no matter how the electric pump is installed, it has nothing to do with it. The electric pump is always off and the solenoid valve is also in the closed state. The water-using equipment always uses the water in the water container.

[0126] The third installation method is Figure 8 (C). The solenoid valve is controlled by the control circuit. When draining water, the solenoid valve is in a closed state, and the water-using equipment always uses the water in the water container.

[0127] The fourth installation method is Figure 8Middle (D). When draining water, the electric pump is controlled by the circuit to stop pumping. The water-using equipment uses the water in the water container. This installation method is mainly used for well water or pond water.

[0128] R8 and BG1 are designed for controlling AC contactors and high-power motors. They can be left blank or omitted when these loads do not need to be controlled.

[0129] After the water is released in the four ways, as the water level in the water container drops, the conductive part g of the movable sheet of the water level height sensor in the water container gradually slides forward, the upper limit level of the water level setting in each node on the fixed sheet is disconnected first, the upper limit level display is turned off first, and the upper limit control signal amplifying transistor BG6 loses the base voltage and is cut off. The upper limit water level control signal output on the emitter of BG6 is zero. This level passes through the circuit to make the upper limit control signal input terminal 6 pin of IC2 change from higher than 2 / 3 of the power supply voltage to lower than 2 / 3 of the power supply voltage. Since the 2nd pin of IC2 is still higher than 1 / 3 of the power supply voltage at this time, the output terminal 3 pin of IC2 continues to be low potential. The water level continues to drop, the conductive part g in the movable sheet continues to slide forward, and the nodes on the fixed sheet continue to be disconnected from back to front gradually, the water level display and control signal circuit are gradually closed from high water level to low water level, the water level display continues to decrease by percentage, and the water level control signal is also disconnected from high water level to low water level and becomes zero step by step until the lower limit level is set. After setting the lower limit control signal to zero, the base voltage of the lower limit signal amplifier transistor BG5 is zero, BG5 is cut off, and its emitter voltage is zero. This level changes the lower limit water level control signal input terminal 2 of IC2 from higher than 1 / 3 of the power supply voltage to lower than 1 / 3 of the power supply voltage. At this time, the 6th pin of IC2 is lower than 2 / 3 of the power supply voltage. After the voltage of the 2nd pin is changed, the output terminal 3rd pin of IC2 changes from low potential to high potential. This high potential passes through the current limiting resistors R6, R7, and R8 to make the transistors BG3, BG2, and BG1 saturated and turned on, the load works, and the water container is filled with water like before the start. Thus, the circuit will continuously repeat the above working process.

[0130] Each circuit is also designed with a manual control function and a timing automatic water supply function connection interface. 14 , AN1 is the manual water supply control function. If the circuit is in the water supply stop state, just press AN1 once, which is equivalent to connecting the 2nd pin of IC2 to a voltage lower than 1 / 3 of the power supply and then disconnecting it. The change of the 2nd pin voltage makes the 3rd pin of IC2 output a high potential, and the circuit works as before to supply water, and stops supplying water according to various circuit design methods after supplying water. 13 , AN2 is the manual stop water supply control function. If the circuit is in the water supply state, just press AN2 once, which is equivalent to adding a voltage higher than 2 / 3 of the power supply to the 6th pin of IC2 and then disconnecting it. The change of the 6th pin voltage makes the 3rd pin of IC2 become a low potential, stopping the water supply. 15, BG4 is the connection interface for the timing water supply control function. The timing circuit outputs a positive pulse at the set time, which is added to the base of the transistor BG4 to change BG4 from cutoff to saturation, and R 15 Connect to pin 2 of IC2, making the voltage of pin 2 lower than 1 / 3 of the power supply. As the pulse disappears, BG4 changes from saturation to cutoff, and R 15 Disconnect the 2nd pin of IC2, and the 2nd pin maintains the original voltage. The change of the voltage of the 2nd pin makes the 3rd pin of IC2 output high potential, and the circuit works as before. After the water is supplied, the circuit works as before. After the lower limit setting function of the four circuits is removed according to the method in the product structure, there is only the lower limit in the circuit, and no lower limit is set. The working process is the same as when there is a lower limit setting function. The display range of the four circuits is zero at zero water level, and 100 or 100% at the highest water level of each range.

[0131] The automatic function, manual function and timed automatic water supply function can work independently or in combination. There is no need to switch between the three working modes.

[0132] The product has simple circuit, reasonable structure, perfect function, reliable operation, low cost, and is suitable for the control of various loads. It solves the water level control problem that could not be well achieved before. BRIEF DESCRIPTION OF THE DRAWINGS

[0133] Figure 1 Middle (A) is the overall view of the water level sensor in the water container.

[0134] (B) is a partial diagram of the installation of the water level sensor on the outer wall of the water container.

[0135] (C) is an exploded view of the outer part of the water level sensor.

[0136] (D) is an exploded view of the inner part of the water level sensor.

[0137] (E) is a circuit diagram when resistance powder is applied to the fixing plate (1) in the water level sensor.

[0138] (F) is a circuit diagram when the fixed plate (1) in the water level sensor is designed as a multi-node circuit.

[0139] (G) is a filter screen diagram.

[0140] Figure 2 (A) is the overall diagram of the tap water pressure sensor.

[0141] (B) is a disassembled view of the external part of the tap water pressure sensor.

[0142] (C) is a partial exploded view of the inner surface of the tap water pressure sensor.

[0143] Figure 3 , Figure 4 , Figure 5 The first, second and third product control circuit diagrams are when resistance powder is coated on the fixed plate (1) in the water level sensor.

[0144] Figure 6 The present invention is a product control circuit diagram when the fixed plate (1) in the water level sensor is designed as a multi-node.

[0145] Figure 7 This is the panel diagram of this product.

[0146] Figure 8 Middle (A), Figure 8 Middle (B), Figure 8 Middle (C), Figure 8 The diagrams (D) in the middle are all load installation diagrams. DETAILED DESCRIPTION

[0147] See attached Figure 1 In the water container water level sensor, the fixed plate (1) is 2 cm long and 0.4 cm wide, and the fixed plate bracket (2) is 1.2 cm long and 1 cm wide. The movable plate (5) is 2 cm long and 0.4 cm wide. The fixed plate (1) and the movable plate (5) should be kept at an appropriate length, that is, the overall length of the sensor should not be too long, and the water level should have an appropriate stroke when it changes. The semi-movable bracket (4) is cylindrical, 1 cm long and 1 cm in diameter, and has a flat hole in its center. The transmission rod (7) can move back and forth in the semi-movable bracket (4). The telescopic spring (6) is 5 cm long, and its length can also be determined according to actual needs. Of course, it is better to be as long as possible so that the elastic force is more uniform. The transmission rod (7) is 6 cm long and 0.25 cm wide, and can also be designed as a circle. The telescopic body (8) is conical, 2 cm long, with a large end diameter of 1 cm and a small end diameter of 0.25 cm. The outer structure (9) is cylindrical, 1 cm in diameter and 12 cm long, with an air inlet and outlet installed on it. When the entire sensor is placed in water, it is led out with a hose. The telescopic body (8) can also be designed as a cylinder, 2 cm long and 1 cm in diameter. The bottom connected to the transmission rod (7) is made of hard material, and the circumference is close to the inner wall of the outer structure (9). The additional part (10) is cylindrical, 1.3 cm long and 1.2 cm in diameter. In order to utilize space, the cylindrical shape of the additional part (10) can be turned 90°. The size of the gong hole (11) is determined according to needs. Transparent plastic and glass are selected as the manufacturing materials. The material of the pressure transmission plate needs to be selected well, which is waterproof and moss-resistant, and the pressure transmission plate can be easily disassembled, washed or replaced.

[0148] See attached Figure 2In the tap water pressure sensor, the outer structure (9) is cylindrical, 14 cm long and 1.8 cm in diameter, the sliding cover (17) is semicircular, 4 cm long, the fixed sheet (1) is rectangular, 3 cm long and 1.8 cm wide, the length of the conductive spring sheet (14) and the conductive spring sheet (3) is determined according to the water pressure point to be controlled in actual use, the movable sheet (5) is 1.1 cm long and 0.4 cm wide, the conductive contact (15) and the conductive contact (16) are installed at positions corresponding to the conductive spring sheet (14) and the conductive spring sheet (3), the semi-movable bracket (4) is cylindrical, 1 cm long and 1.8 cm in diameter, and there is a flat hole in the center of the cylinder, and the transmission rod (7) can move back and forth in the semi-movable bracket (4). The transmission rod (7) is 9 cm long and 0.5 cm wide, and can also be designed to be circular. The telescopic spring (6) is 6.7 cm long, the telescopic body (8) is conical and 2 cm long, the large end has a diameter of 1.8 cm, and the small end has a diameter of 0.5 cm. The telescopic body (8) can also be designed as a cylinder, 2 cm long and 1.8 cm in diameter. The bottom connected to the transmission rod (7) is made of a hard material, and the circumference is close to the inner wall of the outer structure (9). The diameter of the outer structure of the tap water pressure sensor can be determined according to the diameter of the installation water pipe, and the sizes of the corresponding parts can be changed. The manufacturing material is plastic.

[0149] See attached Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , the upper circuits of the four circuits are different, but the lower circuits are the same.

[0150] Upper part of the circuit

[0151] Attached Figure 3 , the parameters of each component in the upper circuit are:

[0152] In the circuit that converts the water level into an electrical signal, the sensor W is a variable resistor of 470KΩ. 49 is 10KΩ, R 50 is 50KΩ.

[0153] IC3 in the electrical signal amplification circuit is an operational amplifier. When the voltage at its in-phase input terminal changes, it can generate a uniformly changing voltage of 0 to 11V at its output terminal. Its model is LM386.

[0154] In the voltage distribution circuit, the voltage regulation value of each Zener diode is 0.8V, and all of them are of the same model. Any small-power Zener diode that can meet the voltage requirements will do.

[0155] The parameters of the voltage regulator in the voltage distribution circuit match the parameters of the circuit that converts the water level into an electrical signal and the electrical signal amplification circuit, so that when the water level changes from zero to the highest water level of each range, the voltage in the voltage distribution circuit just reaches 100% level from zero level.

[0156] In the water level display and water level control signal generating circuit, transistors BG5~BG 15 All are 3DG6. Base current limiting resistor R 16 , R 19 , R 22 , R 25 , R 28 , R 31 , R 34 , R 37 , R 40 , R 43 , R 46 Both are 0.01Ω. Collector current limiting resistor R 17 , R 20 , R 23 , R 26 , R 29 , R 32 , R 35 , R 38 , R 41 , R 44 , R 47 Both are 1KΩ. The emission current limiting resistor R 18 , R 21 , R 24 , R 27 , R 30 , R 33 , R 36 , R 39 , R 42 , R 45 , R 48 All are 80KΩ. The emitter current limiting resistor should have a larger resistance value when it meets the current requirement of the display frame on the collector. In this way, when the transistor is in the cut-off state, the emitter current limiting resistor is connected to the voltage generating circuit R which is lower than 2 / 3 of the power supply. 11 , R 12 And connect to the circuit R9, R 10 The number written in liquid crystal in the display frame on the collector.

[0157] In the water level upper and lower limit setting conversion switch, the upper limit conversion button is on the top and the lower limit conversion button is on the bottom. The specific dimensions of each part can be determined according to production needs.

[0158] Attached Figure 4 , the parameters of each component in the upper circuit are:

[0159] In the water level and electrical signal conversion circuit, sensor W is a 470KΩ variable resistor. 27 is 10KΩ, R 26 is 50KΩ.

[0160] In the electric signal amplification circuit, IC4 is an operational amplifier, R 24 , R 25 It is an impedance matching resistor. When the voltage at the in-phase input of IC4 changes, the voltage generated at the output of IC4 can meet the voltage change requirement of the level input terminal 5 of IC3. Specifically, IC4 is LM358, R 24 is 10KΩ, R 25 is 10KΩ.

[0161] In the water level display and water level control signal generating circuit, IC3 is a level indicator integrated circuit, its model is LM3915, and its peripheral components R 22 is 1.24KΩ, R 23 is 8.06KΩ, the light emitting diodes VD9~VD 14 N0.1. Install the LED into the display frame and write the percentage on the surface of the display frame. You can also replace the LED with a percentage written on a liquid crystal. The percentage display numbers are 0, 20%, 40%, 60%, 80%, 100%.

[0162] The specific size of the water level upper and lower limit setting conversion switch can be determined according to actual production needs.

[0163] The water level upper limit signal switch amplifies and makes the IC26 pin higher than 2 / 3 of the power supply voltage generation circuit, BG6 is 9012, R 21 is 1KΩ, R 19 is 1KΩ, R 20 R is 100KΩ. 20 The larger the value, the better.

[0164] In the circuit for amplifying the lower limit signal of the water level and making the IC22 pin higher than 1 / 3 of the power supply voltage, BG5 is 9012, R 18 is 1KΩ, R 16 1.5KΩ, R 17 is 100KΩ, R 17 The larger the value, the better.

[0165] Attached Figure 5 , the parameters of each component in the upper circuit are:

[0166] All parameters of the upper water level setting given value amplifier circuit, the actual water level signal sampling amplifier circuit, and the lower water level setting given value amplifier circuit are the same. 32 =R39 =R 46 Both are 10KΩ; R 31 =R 38 =R 45 All are 50KΩ; W1 and W2 are 470KΩ variable resistors, W is a 470KΩ variable resistor; IC 7-1 、IC 7-2 、IC 7-3 It is the internal operational amplifier of LM324.

[0167] All parameters of upper limit setting water level display, actual water level display and lower limit setting water level display are the same. IC4, IC5 and IC6 are all the same chip type ICL7106, R 30 =R 37 =R 44 =100KΩ, C7 = C 12 =C 17 =100PF, R 36 =R 43 =R 29 =1KΩ, R 28 =R 35 =R 42 =24KΩ, C6 = C 11 =C 16 =0.1μF electrolytic capacitor, R 27 =R 34 =R 41 =1MΩ, C5 = C 10 =C 15 =0.02μF electrolytic capacitor, C9=C4=C 14 =0.47μF, R 26 =R 33 =R 40 =47KΩ, C3=C8=C 13 = 0.22μF. The same is true for the digital tube in the box.

[0168] Output and input impedance matching resistor R 22 =R 25 =1KΩ. R 23 =R 24 =2.1KΩ.

[0169] Amplifier IC for comparing upper limit water level setting with actual water level 3-1 , the lower limit setting water level and the actual water level comparison amplifier IC 3-2 It is the two comparator amplifiers inside the LM358 or the two comparator amplifiers inside the LM393.

[0170] The upper limit water level signal switch amplifies and changes the voltage of IC26 pin. In the circuit, BG6 is 9013, R21 is 10KΩ, R 19 is 1KΩ, R 20 is 100KΩ, R 19 , R 20 The selected parameters can cause the voltage at pin 6 of IC2 to change accordingly when the circuit is working.

[0171] In the circuit for amplifying the lower limit water level signal and changing the voltage on the IC22 pin, BG5 is 9013, R 18 is 10KΩ, R 16 1.5KΩ, R 17 R is 100KΩ. 16 , R 17 The selected parameters can make the voltage of IC2's 2nd foot change accordingly when the circuit is working. The lower limit setting function is omitted. After the lower limit is fixed at one point, transistor BG5 selects 3DG6, R 18 Choose 1KΩ or less.

[0172] Attached Figure 6 , the parameters of each component in the upper circuit are:

[0173] In the water container water level sensor, the conductive part g in the movable sheet is in the shape of a whole sheet, and the fixed sheet is provided with multiple nodes.

[0174] In the water level display and control signal output circuit, R 23 , R 22 The resistance in the preset is 10KΩ. The display box and the preset display box can use light-emitting diodes or numbers written on liquid crystal. The water level display and control signal output level are consistent with the number of sensor nodes.

[0175] The upper and lower limits of the water level are set with a conversion switch, and the conversion level of the conversion switch is determined by the number of nodes of the sensor. Its size can be determined according to production needs.

[0176] The upper water level control signal is amplified and the IC26 pin is higher than 2 / 3 of the power supply voltage. In the circuit, BG6 is 9013. 19 is 1KΩ, R 20 is 100KΩ, R 21 R is 150KΩ. 20 The larger the value, the better, and it can even be omitted. Connect the emitter directly to the IC26 pin. The lower limit water level control signal is amplified and the IC2 pin 2 is higher than the power supply 1 / 3 voltage generation circuit. BG5 is 9013. R 16 1.5KΩ, R 17 is 100KΩ, R 18 is 150KΩ, R 17The larger the value, the better, and it can even be omitted. Connect the emitter directly to pin 2 of IC2. The entire upper and lower limit amplifier circuit BG6, resistor R 19 , R 20 and BG5, resistor R 16 , R 17 It can also be omitted, and R 18 Directly connect to pin 2 of IC2 and connect R 21 Directly connected to pin 6 of IC2, R 18 With R 21 The resistance value needs to be adjusted.

[0177] Lower part of the circuit

[0178] Attached Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 The parameters of each component are the same:

[0179] Manual control and timed automatic water supply control, manual water supply control R 14 1KΩ, AN1 is a normally open button switch. Manual water supply stop control R 13 1KΩ, AN2 is a normally open button switch. 15 1KΩ, BG4 is 3DG 12 Or 3DG6, the time setting uses the alarm function of the electronic watch.

[0180] IC2 and its peripheral components, IC2 is NE555, which works in bistable multivibrator mode. C2 is a 0.01μ non-polarized capacitor. R9 is 100KΩ in the voltage generation circuit below 1 / 3 of the power supply, R 10 20KΩ. Lower than 2 / 3 of the power supply voltage generation circuit R 11 is 100KΩ, R 12 is 100KΩ.

[0181] In the drive amplifier circuit, BG1, BG2, and BG3 are all 9013. R6, R7, and R8 are all 10KΩ, and R2, R3, and R4 are all 250Ω trimming resistors.

[0182] Working status display: VD6, VD7, and VD8 are all green light emitting diodes.

[0183] In the control circuit, SCR is a unidirectional thyristor, which is used to control the solenoid valve and is selected according to the power of the solenoid valve. VS is a bidirectional thyristor, which is used to control the electric pump and is selected according to the power of the electric pump. The two contacts a and b are the contacts of the control solenoid valve part in the tap water pressure sensor. R5 is 100KΩ, and the resistance of R5 is as large as possible to prevent the voltage from being connected to R7 and R8 through R6. The two contacts c and d are the contacts of the control electric pump part in the tap water pressure sensor. The strong pumping switch K2 is a large current single-line switch.

[0184] In the power supply and power display circuit, IC1 is 7812, C1 is 4700μF, VD1~VD4 are 2CP21×4, T secondary voltage is 15V, K1 is a single-pole single-throw switch, R1 is 200Ω, and VD4 is red.

[0185] See attached Figure 7 , the dimensions of each part in the figure are:

[0186] The length is 11cm and the width is 6.3cm. The number of display frames and the number of switch frames are determined according to the circuit design. All sizes are made according to needs.

Claims

1. Liquid level display monitoring machine, characterized in that: Products include: A water container water level sensor, a tap water pressure sensor, a control circuit, and a load are installed; both sensors are connected to the control circuit, and the control circuit is connected to the load; the water container water level sensor converts the water level change information in the water container into electrical signal information, and the tap water pressure sensor is used to detect the tap water pressure. The control circuit works according to the electrical signals transmitted by the water level sensor and the water pressure sensor, and then the circuit controls the load to work.

2. The liquid level display monitoring machine according to claim 1, characterized in that: A water level sensor for a water container comprises an inner surface structure (D) and an outer surface structure (9); the inner surface structure comprises: a fixed plate (1) is mounted on a fixed plate bracket (2), and there are two schemes on the fixed plate (1), one scheme is to coat the fixed plate (1) with resistance powder, and the other scheme is to make multiple nodes on the fixed plate (1), and the resistance powder or the nodes are led out by electrodes; one end of a movable plate (5) is close to the fixed plate (1), and the other end is mounted on the top of a transmission rod (7); when the fixed plate (1) is coated with resistance powder, the movable plate (5) is The corresponding conductive part g is designed to be narrower and 1-shaped; when the fixed plate (1) is made into multiple nodes, the corresponding conductive part g on the movable plate (5) is designed to be wider and whole; the movable plate (5) and the transmission rod (7) are installed on the semi-movable bracket (4), passing through the inner part of the semi-movable bracket (4) to be movably connected; the other end of the transmission rod (7) is connected to the rear part of the pressure transmission plate (8), and the transmission rod (7) is also covered with a telescopic spring (6), one end of the telescopic spring (6) is against the rear wall of the pressure transmission plate (8), and the other end is against the rear wall of the pressure transmission plate (8). The end of the sensor is against the semi-movable bracket (4), and the movable sheet (5) and the transmission rod (7) can move on the semi-movable bracket (4); the pressure transmission sheet (8) is a telescopic body that can move back and forth under the action of the water level pressure and the telescopic spring (6), so that the transmission rod (7) and the movable sheet (5) move back and forth accordingly, and the movable sheet (5) slides on the fixed sheet (1); when the water level of the sensor changes from 0 to the highest water level, its movable sheet (5) slides from the beginning end to the end end of the fixed sheet (1); the outer structure (9) is the same as the circle, and the inner surface structure is fixed by The fixed plate bracket (2) and the semi-movable bracket (4) are fixed to the inner wall of the outer structure (9); the front end of the pressure transmission plate (8) is glued to the front end of the inner wall of the outer structure (9) by adhesive; the entire sensor can be directly put into water, and can also be inserted into the inner surface of the circular additional part (10) and then fixed to the outer wall of the water container; the air inlet and outlet holes (12) and the electrode lead wire (13) are designed on the outer structure (9), and the filter (G) is sleeved on the front end of the outer structure (9); the electrode lead wire (13), the resistance powder, the node, and the g on the movable plate (5) are conductors.

3. The liquid level display monitoring machine according to claim 1, characterized in that: The tap water pressure sensor comprises an outer structure (9) and an inner structure (C); the inner structure comprises: a fixed plate (1) is provided with a conductive spring (14) and a conductive spring (3); a movable plate (5) is provided with a conductive contact (15) and a conductive contact (16); the conductive contact (15) and the beginning of the conductive spring (14) are overlapped, and the conductive contact (16) and the beginning of the conductive spring (3) are overlapped; the conductive spring (14) and the conductive spring (16) are overlapped. ) and the conductive contact (15) are used to control the electric pump, the conductive spring (14) is connected to the electrode lead wire (c), and the conductive contact (15) is connected to the electrode lead wire (d); the conductive spring (3) and the conductive contact (16) are used to control the electromagnetic valve, the conductive spring (3) is connected to the electrode lead wire (a), and the conductive contact (16) is connected to the electrode lead wire (b); the movable sheet (5) is connected to one end of the transmission rod (7), and the transmission rod (7) is installed on the semi-movable bracket (4), passes through the inner part of the semi-movable bracket (4), and is movably connected and can move forward and backward; the other end of the transmission rod (7) is installed on the rear part of the pressure transmission plate (8); the pressure transmission plate (8) is a telescopic body and can move forward and backward; the telescopic spring (6) is sleeved on the transmission rod (7), one end of which is pressed on the semi-movable bracket (4), and the other end is pressed on the rear part of the pressure transmission plate (8); the outer structure (9) is circular, and the inner surface structure is installed on the inner wall of the outer structure (9) through the fixed plate (1) and the semi-movable bracket (4), and the front end of the pressure transmission plate (8) is glued to the front end of the inner wall of the outer structure (9); a sliding cover (17) is designed on the outer structure (9); the sliding cover (17) is used to conveniently adjust the length of the conductive spring (14) and the conductive spring (3); the entire sensor is installed on the tee and connected to the tap water pipe.

4. The liquid level display monitoring machine according to claim 1, characterized in that: Control circuit part: It includes control circuit one when resistor powder is used in the sensor, control circuit two, control circuit three, and control circuit when nodes are used in the sensor.

5. The liquid level display monitoring machine according to claim 4, characterized in that: One of the control circuits, in which the sensor uses resistor powder; the whole circuit is divided into the front half and the back half, the front half includes: a water level height and electrical signal conversion circuit in the water container, an electrical signal amplification circuit, an amplified electrical signal voltage distribution circuit, a water level display and water level control signal generation circuit, and an upper and lower limit water level setting conversion switch; the water level height and electrical signal conversion circuit is connected to the electrical signal amplification circuit connected to the amplified electrical signal voltage distribution circuit, each unit of the voltage distribution circuit is connected to the water level display and water level control signal generation circuit on each unit, and the water level control signal generation circuit is connected to the upper and lower limit water level setting conversion switch; The water level in the water container and the electrical signal conversion circuit are composed of resistor R 49 , sensor W, resistor R 50 The electric signal amplification circuit is composed of an operational amplifier IC3, and the voltage distribution circuit is composed of ten voltage regulator tubes D 1～ D 10 The water level display and water level control signal generating circuit has eleven stages consisting of transistors BG5-BG 15 , resistor R 16～ Resistor R 48 , each display frame, each display frame is composed of numbers written in liquid crystal, the upper and lower limit water level setting conversion switch is composed of the first row of contacts, the second row of contacts, the third row of contacts and two upper and lower limit conversion buttons; the a terminal of the sensor W is connected to the voltage divider resistor R 49 , R 49 Connect to the positive pole of the power supply; the b end of the sensor W is connected to the voltage divider resistor R 50 , R 50 Connect the negative pole of the power supply; the b end of the sensor W is connected to the conductive part g of the sliding end and then connected to the in-phase input end of the operational amplifier IC3. The inverting input end of the operational amplifier IC3 is grounded. The operational amplifier IC3 is connected to the positive and negative poles of the power supply. The output end of the operational amplifier IC3 is connected to ten voltage regulator tubes D 1～ D 10 A stable and balanced voltage distribution circuit in series; each voltage dividing unit of the voltage distribution circuit is connected with a water level display and water level control signal generating circuit of the unit; the water level display and water level control signal generating circuit is divided into eleven levels of 0, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, each level is composed of a transistor, a base limiting current resistor of the transistor, a water level display frame and a collector limiting current resistor on the collector of the transistor, an emitter limiting current resistor of the transistor, and a corresponding voltage regulator connected to the voltage distribution circuit at the output end of IC3; the base limiting current resistor in each level is connected to the corresponding voltage regulator on the voltage distribution circuit at the output end of the operational amplifier IC3, the water level display frame and the current limiting resistor on the collector are connected in parallel and then connected to the positive pole of the power supply, the current limiting resistor on the emitter is grounded, and the water level control of each level is connected to the positive pole of the power supply. The signal is generated by the emitter of the transistor of this stage, and then connected to the corresponding contacts in the first row of the upper and lower limit water level setting conversion switch through the line; the second row of contacts in the conversion switch is set as the upper limit setting water level signal conversion contact point, and all contacts except the zero level in the second row are connected together to form the upper limit water level control line; the third row of contacts is the lower limit water level setting signal conversion contact point, and all contacts except the 100% level in the third row are connected together to form the lower limit water level control signal line; all water level control signal generating lines in the first row of the conversion switch can be converted into upper limit or lower limit water level control lines through the conversion of the upper limit conversion button or the lower limit conversion button; each contact of the conversion switch is rectangular, and there is only a small gap between the contacts in each row, and the conductive part of the conversion button is wider. When converting, the first level to be converted is connected first and then the current level is disconnected; The upper limit water level control signal line and the lower limit water level control signal line connected from the conversion switch in the front half of the circuit are respectively connected to the back half of the circuit.

6. The liquid level display monitoring machine according to claim 4, characterized in that: The second control circuit, in which the sensor uses resistor powder, the whole circuit is divided into the front half and the back half, the front half includes: a water level height and electric signal conversion circuit in the water container, an electric signal amplification circuit, a water level display and water level control signal generation circuit, a water level upper and lower limit setting conversion switch, an upper limit water level signal amplification circuit and a circuit for changing the voltage of IC26 pin between lower than 2 / 3 of the power supply voltage and higher than 2 / 3 of the power supply voltage, a lower limit water level signal amplification circuit and a circuit for changing the voltage of IC22 pin between lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage; the water level height and electric signal conversion circuit is connected to the electric signal amplification circuit connected to the water level display and water level control signal generation circuit connected to the first row of corresponding contacts in the water level upper and lower limit setting conversion switch, the second row of contacts in the conversion switch is connected to the upper limit water level signal amplification circuit and a circuit for changing the voltage of IC26 pin between lower than 2 / 3 of the power supply voltage and higher than 2 / 3 of the power supply voltage, and the third row of contacts in the conversion switch is connected to the lower limit water level signal amplification circuit and a circuit for changing the voltage of IC22 pin between lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage; The water level in the water container and the electrical signal conversion circuit are composed of resistor R 27 , sensor W, resistor R 26 The electric signal amplification circuit is composed of the operational amplifier IC4, the water level display and water level control signal generation circuit is composed of the level indication integrated block IC3, the resistor R 22 , R 23 , R 24 , R 25 , LED VD9-VD 14 The water level upper and lower limit setting switch consists of the first row of contacts, the second row of contacts, the third row of contacts, and two upper and lower limit setting conversion buttons. The circuit for amplifying the upper water level signal and changing the voltage of the integrated block IC26 pin consists of transistor BG6, resistor R 19 , R 20 , R 21 The circuit that amplifies the lower limit water level signal and changes the voltage on the IC22 pin consists of transistor BG5, resistor R 16 , R 17 , R 18 Composition: The a terminal of sensor W is connected to the voltage divider resistor R 27 , R 27 Connect to the positive pole of the power supply, and the b end of the sensor W is connected to the voltage divider resistor R 26 , R 26 Connect the negative pole of the power supply, connect the b end of the sensor W to the conductive part g of the sliding end, and then connect to the in-phase input end of the operational amplifier IC4. The inverting input end of the operational amplifier IC4 is grounded. The operational amplifier IC4 is connected to the positive and negative poles of the power supply. The output end of the operational amplifier IC4 is connected to the impedance matching resistor R 24 , R 25 Then connect it to the level signal input terminal 5 pin of the level indicator integrated block IC3 in the water level display and water level control signal generating circuit, the 2nd and 4th pins of the integrated block IC3 are grounded, the 3rd pin is connected to the positive pole of the power supply, the 6th pin is connected to the 7th pin and then connected to the resistor R 22 Then connect the 8th pin and then the resistor R 23 Then ground, pins 9, 10, 11, 12, and 13 are suspended, and pins 1, 18, 17, 16, 15, and 14 are connected to water level display LEDs VD9-VD 14 Then connect to the positive pole of the power supply; the water level control signal generating line is connected from pin 1, pin 18, pin 17, pin 16, pin 15 and pin 14 of the integrated block IC3 respectively, and then connected to the corresponding contacts in the first row of the water level upper and lower limit setting switch; the contacts except the zero level in the second row of the conversion switch are connected together as the upper limit water level signal control line; the contacts except the 100% level in the third row of the conversion switch are connected together as the lower limit water level signal control line; all the water level control signal lines in the first row can be converted into upper limit or lower limit water level signal control lines through the conversion of the upper limit or lower limit conversion button; each contact of the conversion switch is rectangular, and there is a small gap between the contacts in each row, and the conductive part of the conversion button is wider. When converting, the first level to be converted is connected first and then the current pole is disconnected; the upper limit water level signal control line in the conversion switch is connected to the base current limiting resistor R of BG6 in the circuit that amplifies the upper limit water level signal and changes the voltage of IC26 pin 21 One end of the resistor R 21 The other end is connected to the base of transistor BG6; transistor BG6 is used to amplify the upper limit signal, and resistor R 19 , R 20 To make the voltage at pin 26 of the integrated circuit produce a variable resistance; resistor R 19 Connect to the collector of transistor BG6 and then to the positive pole of the power supply, resistor R 20 Connected to the emitter of transistor BG6 and then to ground. The upper limit water level control signal is connected to the emitter of transistor BG6. The lower limit water level signal control line in the conversion switch is connected to the base current limiting resistor R of transistor BG5 in the circuit to amplify the lower limit water level signal and change the voltage of IC22 pin. 18 One end of the resistor R 18 The other end is connected to the base of transistor BG5; transistor BG5 is used to amplify the lower limit signal, and resistor R 16 , R 17 In order to make the voltage at pin 2 of IC2 produce a variable resistance, the resistor R 16 Connect to the collector of transistor BG5 and then to the positive pole of the power supply, resistor R 17 Connect to the negative pole of the power supply after the emitter of BG5, and the lower limit water level control signal line behind is connected from the emitter of transistor BG5; The upper limit water level control signal line and the lower limit water level control signal line connected to the emitter of transistor BG6 and the emitter of transistor BG5 in the first half of the circuit are respectively connected to the second half of the circuit.

7. The liquid level display monitoring machine according to claim 4, characterized in that: The third control circuit uses resistor powder on the sensor in this circuit. The whole circuit is divided into the front half and the back half. The front half includes: upper limit given value circuit, upper limit given value amplification circuit, upper limit given value digital tube digital display circuit, water level height in the water container is converted into electrical signal circuit, actual water level signal amplification circuit, actual water level digital tube digital display circuit, lower limit given value circuit, lower limit given value amplification circuit, lower limit given value digital tube digital display circuit, upper limit given value and actual water level signal voltage comparison amplification circuit, lower limit given value and actual water level signal voltage comparison amplification circuit, upper limit water level signal amplification and IC26 pin voltage conversion circuit between higher than 2 / 3 power supply voltage and lower than 2 / 3 power supply voltage, lower limit water level signal amplification and IC22 pin voltage conversion circuit between lower than 1 / 3 power supply voltage and higher than 1 / 3 power supply voltage; The upper limit given value circuit is connected to the upper limit given value amplifier circuit, one path of the upper limit given value amplifier circuit is connected to the upper limit given value digital tube digital display circuit, and the other path is connected to the upper limit given value and actual water level signal voltage comparison amplifier circuit; The water level of the water container is converted into an electrical signal circuit connected to the actual water level signal amplification circuit. One path of the actual water level signal amplification circuit is connected to the actual water level digital tube digital display circuit, and the other path is connected to the upper limit given value and the actual water level signal voltage comparison amplification circuit on one hand, and the lower limit given value and the actual water level signal voltage comparison amplification circuit on the other hand; The lower limit given value circuit is connected to the lower limit given value amplifier circuit, one path of the lower limit given value amplifier circuit is connected to the lower limit given value digital tube digital display circuit, and the other path is connected to the lower limit given value and actual water level signal voltage comparison amplifier circuit; The upper limit given value and the actual water level signal voltage comparison amplifier circuit are connected to the upper limit water level signal amplification and the IC26 pin voltage is converted between lower than 2 / 3 of the power supply voltage and higher than 2 / 3 of the power supply voltage; the lower limit given value and the actual water level signal voltage comparison amplifier circuit are connected to the lower limit water level signal amplification and the IC22 pin voltage is converted between lower than 1 / 3 of the power supply voltage and higher than 1 / 3 of the power supply voltage; The upper limit given value circuit consists of resistor R 31 , R 32 , potentiometer W1, the upper limit set value amplifier circuit is composed of op amp integrated block IC 7-1 The upper limit given value digital tube digital display circuit is composed of digital tube digital display driver IC4, capacitor C 3～ C7, resistor R 26 -R 30 , digital tube; the water level in the water container is converted into an electrical signal by a resistor R 38 , R 39 Sensor W; the actual water level signal amplification circuit is composed of an op amp integrated circuit IC 7-2 Composition: The water level digital tube digital display circuit of the water container is composed of the digital tube digital display driver integrated block IC5, capacitor C 8～ C 12 , resistor R 33～ R 37 , digital tube; the lower limit given value circuit is composed of resistor R 45 , R 46 , potentiometer W2; the lower limit given value amplifier circuit is composed of an operational amplifier integrated block IC 7-3 Composition: The lower limit given value digital tube digital display circuit consists of a digital tube digital display driver IC6, a capacitor C 13～ C 17 , resistor R 40～ R 44 , digital tube; the upper limit given value and the actual water level signal voltage comparison amplifier circuit is composed of a comparison amplifier integrated block IC 3-1 , resistor R 22 , R 23 Composition: The lower limit given value and the actual water level signal voltage comparison amplifier circuit is composed of a comparison amplifier integrated block IC 3-2 , resistor R 24 , R 25 The circuit for amplifying the upper water level signal and changing the voltage on the IC26 pin consists of transistor BG6, resistor R 19 , R 20 , R 21 The circuit for amplifying the lower limit water level signal and changing the voltage on the IC22 pin consists of transistor BG5, resistor R 16 , R 17 , R 18 composition; In the upper limit water level setting circuit, the potentiometer W1 is connected to the resistor R 32 The back is connected to the positive pole of the power supply, and the lower end of W1 is connected to the resistor R 31 Then connect it to the negative pole of the power supply; the lower end of the potentiometer W1 is connected to the sliding end and then connected to the operational amplifier IC 7-1 The non-inverting input terminal of the op amp IC 7-1 The inverting input terminal of the op amp IC is grounded. 7-1 Connect the positive and negative poles of the power supply, op amp IC 7-1 The output end is connected to the voltage input end 31 pin of the integrated circuit IC4. The integrated circuit IC4 is combined with the digital tube to display the range between 0-100; the op amp IC 7-1 The output end of the other way is connected to the resistor R 22 Then connect to the comparator amplifier IC 3-1 The non-inverting input terminal; In the actual water level of the water container, the a terminal of the sensor W is connected to the voltage divider resistor R 39 , resistor R 39 Connect to the positive pole of the power supply, and the b end of the sensor W is connected to the voltage divider resistor R 38 , resistor R 38 Connect the negative pole of the power supply, connect the b end of the sensor W to the conductive part g of the sliding end, and then connect it to the operational amplifier IC 7-2 The non-inverting input terminal of the op amp IC 7-2 The inverting input terminal of the op amp IC is grounded. 7-2 The output end is connected to the voltage input end 31 pin of IC5, and the display range of IC5 combined with the digital tube is between 0-100; the op amp IC 7-2 The other side of the output end is connected to the resistor R 23 Then connect to the comparator amplifier IC 3-1 The inverting input terminal; on the other hand, connect the resistor R 24 Then connect to the comparator amplifier IC 3-2 The non-inverting input terminal; In the lower limit water level setting circuit, the potentiometer W2 is connected to the resistor R 46 Then connect the positive pole of the power supply and the lower end of W2 to the resistor R 45 Then connect it to the negative pole of the power supply, the lower end of the potentiometer W2 is connected to the sliding end and then connected to the operational amplifier IC 7-3 The non-inverting input terminal of the op amp IC 7-3 The inverting input terminal of the op amp IC is grounded. 7-3 The output end is connected to the voltage input end 31 pin of IC6. The display range of IC6 and digital tube is between 0-100. 7-3 The output end of the other way is connected to the resistor R 25 Then connect to the comparator amplifier IC 3-2 The inverting input terminal; Amplifier IC for comparing voltage between upper limit given value and actual water level signal 3-1 The upper limit given value is connected to its non-inverting input terminal, the actual water level signal voltage is connected to its inverting input terminal, and its output terminal is connected to the base current limiting resistor R of the transistor BG6 in the circuit to amplify the upper limit water level signal and change the voltage of the integrated circuit IC26 pin. 21 The transistor BG6 is used to amplify the upper water level signal, and the resistor R 19 , R 20 In order to make the voltage at pin 26 of the integrated circuit produce a variable resistance, the resistor R 19 Connect to the collector of transistor BG6 and then to the positive pole of the power supply, and resistor R 20 Connect to the emitter of transistor BG6 and then to ground. The upper limit water level control signal line is connected from the collector of transistor BG6. Amplifier IC for comparing the lower limit given value with the actual water level signal voltage 3-2 The actual water level signal voltage is connected to its in-phase input terminal, the lower limit given value is connected to its inverting input terminal, and its output terminal is connected to the lower limit water level signal to amplify the on-off and make the voltage of the integrated block IC22 pin change. The base current limiting resistor R of the transistor BG5 in the circuit 18 Upper; transistor BG5 is used to amplify the lower limit water level signal, and resistor R 16 , R 17 To make the voltage at pin 22 of the integrated circuit produce a variable resistance; the resistor R 16 Connect to the collector of transistor BG5 and then to the positive pole of the power supply, resistor R 17 Connect to the emitter of transistor BG5 and then ground it. The lower limit water level control signal is output from the emitter of transistor BG5. The upper limit water level control signal line and the lower limit water level control signal line generated by transistors BG6 and BG5 in the first half of the circuit are respectively connected to the second half of the circuit.

8. The liquid level display monitoring machine according to claim 4, characterized in that: The sensor uses a multi-node control circuit. The entire circuit is divided into the front half and the back half. The front half includes: water level height converted into electrical signals, water level display circuit, water level control signal line, upper and lower limit water level setting conversion switch, upper limit water level signal on-off amplification and conversion circuit for the integrated block IC26 pin voltage between lower than 2 / 3 power supply voltage and higher than 2 / 3 power supply voltage, lower limit water level signal on-off amplification and conversion circuit for the integrated block IC22 pin voltage between lower than 1 / 3 power supply voltage and higher than 1 / 3 power supply voltage; the water level height is converted into an electrical signal connected to the water level display circuit, and the When the water level height is converted into an electrical signal, it is connected to the first row of contacts corresponding to the upper and lower water level setting switch through the water level control signal line. The contacts of the second row of the switch except the zero level are connected together with the upper water level signal on-off amplification and the conversion circuit that makes the voltage of the integrated block IC26 pin higher than 2 / 3 of the power supply voltage and lower than 2 / 3 of the power supply voltage. The contacts of the third row of the switch except the 100% level are connected together with the lower water level signal on-off amplification and the conversion circuit that makes the voltage of the integrated block IC22 pin higher than 1 / 3 of the power supply voltage and lower than 1 / 3 of the power supply voltage. The water level height is converted into an electrical signal by the conductive part g on the movable plate (5) in the sensor and the node (x)-b on the fixed plate (1) in the sensor. The water level display circuit is composed of a current limiting resistor and a display frame of each level. The upper and lower limit water level setting conversion switch is composed of a first row of contacts, a second row of contacts, a third row of contacts and two upper and lower limit conversion buttons. The upper limit water level signal is amplified and the circuit that changes the voltage of the integrated block IC26 pin is composed of a transistor BG6, a resistor R 19 , R 20 , R 21 The circuit for amplifying the lower limit water level signal and changing the voltage at pin 22 of the integrated circuit consists of transistor BG5, resistor R 16 , R 17 , R 18 The present invention is composed of: the conductive part g on the movable plate (5) in the sensor is connected to the positive electrode of the power supply; the nodes (x)-b on the fixed plate (1) in the sensor are respectively connected to the water level display circuit of each level; the water level display circuit of each level is connected to the current limiting resistor at the node and then connected to the display frame and then to the ground; the water level control signal line of each level is connected from the node on the fixed plate (1) respectively, and then connected to the corresponding contacts in the first row of the upper and lower limit water level setting conversion switch; the contacts in the second row other than the zero level in the water level setting conversion switch are connected together to form the upper limit water level control signal line, which is connected to the base current limiting resistor R of the transistor BG6. 21 The transistor BG6 is used for signal on-off amplification, and the resistor R 19 , R 20 To make the voltage of IC26 pin produce a variable resistance; R 19 Connect to the collector of BG6 and the positive pole of the power supply, R 20 Connect to the emitter of transistor BG6 and then to ground; the upper limit water level control signal line behind is connected from the emitter of transistor BG6; the contacts except the third row 100% level in the water level setting conversion switch are connected together as the lower limit water level control signal line, which is connected to the base current limiting resistor R of transistor BG5 18 On; transistor BG5 is used for signal on-off amplification, resistor R 16 , R 17 To make the voltage at pin 22 of the integrated circuit produce a variable resistance; R 16 Connect the collector of transistor BG5 to the positive pole of the power supply; R 17 Connect to the emitter of BG5 and then to ground. The lower limit water level control signal line is connected from the emitter of BG5. All the water level control signal lines in the first row of the transfer switch can be converted into upper or lower limit water level control lines through the conversion of the upper or lower limit conversion button; each contact of the transfer switch is rectangular, and there is only a small gap between the contacts in each row. The conductive part of the conversion button is wider. When converting, the level to be converted is connected first and then the current level is disconnected; The upper limit water level control signal line connected to the emitter of transistor BG6 in the first half of the circuit and the lower limit water level control signal line connected to the emitter of transistor BG5 are respectively connected to the second half of the circuit.

9. The liquid level display monitoring machine according to claim 4, characterized in that: The control circuit one, the control circuit two, the control circuit three, and the control circuit using the node in the sensor are the same after entering the second half; the circuit of the second half includes: manual water supply circuit, manual water supply stop circuit, timed automatic water supply interface circuit, voltage generation circuit below 2 / 3 of the power supply, voltage generation circuit below 1 / 3 of the power supply, bistable multivibrator, three-way drive control signal generation and amplification circuit, tap water pressure sensor connection point, load control circuit, power supply circuit; the manual water supply circuit and the timed automatic water supply interface circuit are connected to the voltage generation circuit below 1 / 3 of the power supply and then connected to the bistable multivibrator lower limit signal input terminal 2 pin; the manual water supply stop circuit is connected to the voltage generation circuit below 2 / 3 of the power supply and then connected to the bistable multivibrator upper limit signal input terminal 6 pin; the bistable multivibrator circuit is connected to the three-way drive control signal generation and amplification circuit, and then connected to the load control circuit, the drive control signal generation and amplification circuit and the load control circuit are connected to the tap water pressure sensor connection point, and the entire circuit is finally connected to the power supply circuit; The manual water supply circuit consists of a resistor R 14 , the normally open button switch AN1, the manual water supply stop circuit consists of resistor R 13 , normally open button switch AN2, the timing automatic water supply interface circuit is composed of resistor R 15 , transistor BG4, the voltage generation circuit is lower than 2 / 3 of the power supply and consists of resistor R 11 , R 12 The circuit for generating a voltage lower than 1 / 3 of the power supply consists of resistors R9, R 10 The bistable multivibrator circuit is composed of an integrated block IC2 and a capacitor C2. The first circuit of the three-way drive control signal generation and amplification and load circuit is composed of a transistor BG3, resistors R4, R5, R6, a unidirectional thyristor SCR, a solenoid valve J, electrode lead wires a and b for controlling the solenoid valve in a tap water pressure sensor, and a light-emitting diode VD8; the second circuit is composed of a transistor BG2, resistors R3, R7, a light-emitting diode VD7, a bidirectional thyristor VS, a single-pole single-throw switch K2, an electric water pump M, and electrode lead wires c and d for controlling the electric pump in a tap water pressure sensor; the third circuit is composed of a transistor BG1, resistors R2, R8, and a light-emitting diode VD6; the power supply circuit is composed of a resistor R1, a light-emitting diode VD5, a three-terminal voltage regulator integrated block IC1, a capacitor C1, diodes VD1-VD4, a transformer T, and a switch K1; The upper limit water level control signal line connected from the first half of the circuit is connected to the upper limit water level control signal input terminal 6 pin of the integrated block IC2. The 6 pin of the integrated block IC2 is also connected to a resistor R 13 , AN2 composed of manual water supply stop circuit, R 11、 R 12 The circuit is composed of a voltage generating circuit lower than two-thirds of the power supply; R 13 One end is connected to IC26 pin, the other end is connected to normally open button switch AN2, AN2 is connected to the positive pole of the power supply; R 11 With R 12 The connection point is connected to IC26 pin, R 11 Connect to the positive pole of the power supply, R 12 Connect to the negative pole of the power supply; the lower limit water level control signal line connected from the first half of the circuit is connected to the lower limit water level control signal input terminal 2 of the integrated block IC2, and the 2nd pin of IC2 is also connected to the R 14 , AN1 composed of manual water supply circuit, R 15 , BG4 composed of timing water supply connection interface circuit, R9, R 10 The voltage generating circuit composed of the power supply is lower than 1 / 3; R 14 One end is connected to IC22 pin, and the other end is connected to normally open push button switch AN1, AN1 is grounded; resistor R 15 One end is connected to IC22 pin, the other end is connected to the collector of transistor BG4, the emitter of BG4 is grounded, and the base of BG4 is connected to the timing water supply control signal input connection point A; resistors R9, R 10 The connection point is connected to IC22 pin, resistor R9 is connected to the positive pole of the power supply, and resistor R 10 Connect to the negative pole of the power supply; Pin 4 and Pin 8 of the integrated block IC2 are connected to the positive pole of the power supply, Pin 1 is grounded, Pin 5 is connected to capacitor C2 and then to ground, Pin 3 is the output terminal of the drive control signal, and is connected to three drive control signal generation and amplification circuits; the first circuit is used to control the solenoid valve. In this circuit, the base of the drive signal amplifying transistor BG3 is connected to resistor R6, and resistor R6 is connected to pin 3 of the integrated block IC2. The collector of the transistor BG3 is connected to the solenoid valve working display light-emitting diode VD8, and VD8 is connected to the positive pole of the power supply after being connected to resistor R4; the emitter of the transistor BG3 is connected to the control pole of the unidirectional thyristor SCR; the unidirectional thyristor controls the solenoid valve, and the solenoid valve is connected to a DC power supply; the base of the transistor BG3 is also connected in parallel with resistor R5 and the electrode lead wires a and b of the control solenoid valve in the tap water pressure sensor, and resistor R5 is the base current limiting resistor of BG3 when the electrode lead wires a and b are connected, and the second circuit is used to control the electric pump. In this circuit, the drive The base of the dynamic signal amplifying transistor BG2 is connected to the base current limiting resistor R7, and the resistor R7 is connected to the 3rd pin of the integrated circuit IC2. The collector of the transistor BG2 is connected to the light-emitting diode VD7 that displays the working status of the control circuit, and then connected to the collector current limiting resistor R3 and then connected to the power supply; the emitter of the transistor BG2 is connected to the control electrode of the bidirectional thyristor VS, and the bidirectional thyristor VS is connected in series with the electrode lead wires c and d of the control electric pump in the tap water pressure sensor, the strong pumping switch K2, and the electric pump M, and then connected to 220V AC; the electrode lead wires c and d are connected in parallel with the strong pumping switch K2; the third route is to control the high-power load standby. In this circuit, the base of the transistor BG1 is connected to the resistor R8, and the resistor R8 is connected to the 3rd pin of the integrated circuit IC2, the collector of the transistor BG1 is connected to the light-emitting diode VD6 and then to the resistor R2 and then to the positive pole of the power supply, and the emitter of the transistor BG1 is connected to the standby equipment; the entire product circuit is connected to the power circuit.

10. The liquid level display monitoring machine according to claim 1, characterized in that: The load is installed, and the load includes a tap water pressure sensor (20), an electric pump (18), and an electromagnetic valve (19); the tap water pressure sensor (20) and the electric pump (18) are installed on the tap water inlet pipe, the tap water pressure sensor (20) is installed in the front, the electric pump (18) is installed in the back, and the electromagnetic valve (19) is installed on the pipe leading to the water container, and the tap water pressure sensor (20) is connected to the electric pump (18) and also connected to the electromagnetic valve (19).

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