Digital display circuit for humidity adjustment of humidifier

Abstract

The utility model relates to a digital display circuit for humidity regulation of a humidifier, which belongs to the technical field of electronics and comprises a humidifier humidity regulation module, a humidity regulation grading module and an output signal processing and display module. The humidifier humidity adjusting module is adjusted through a slide rheostat R1, and meanwhile, a voltage signal is generated through the change of the resistance value of the slide rheostat; the humidity adjusting and grading module is used for receiving the voltage signals generated by the humidifier humidity adjusting module and dividing the voltage signals into eight grades; and the output signal processing and display module is used for receiving the level signal output by the humidity adjusting and grading module, encoding the signal into a digital signal, and displaying the digital signal through a nixie tube and an LED. The humidifier is simple in structure, sensitive in response, capable of visually displaying the humidity level and suitable for various occasions where the humidity of the humidifier needs to be concerned.

Description

Technical Field

[0001] This utility model relates to a digital display circuit for humidity adjustment in a humidifier, belonging to the field of electronic technology. Background Technology

[0002] With the improvement of people's living standards, the comfort of indoor environments has received increasing attention. Humidity, as one of the important factors affecting indoor environmental comfort, is directly related to human health, the quality of the living environment, and the normal use of electrical appliances. Excessive or insufficient humidity can cause problems such as dry skin, respiratory discomfort, and mold growth. Therefore, humidifier humidity control has become an important component of modern smart home systems. To facilitate monitoring and adjustment of humidity levels, many modern humidity control systems are equipped with humidity sensors and provide real-time feedback of humidity values ​​through digital display circuits, allowing users to intuitively understand the humidifier's humidity status and make appropriate adjustments. Simultaneously, LED indicator lights and other display elements visually present humidifier parameters such as humidity, making it easy for users to observe the humidifier's humidity status. Therefore, there is a need to develop a simple, economical, and efficient device that can adjust and display humidifier humidity in real time. This device should be able to intuitively inform users of the current humidifier humidity level and provide clear alerts when the humidity is too low or too high, thereby helping users take appropriate measures to prevent health problems. Summary of the Invention

[0003] The technical problem this invention aims to solve is: This invention proposes a digital display circuit for humidifier humidity adjustment, aiming to improve the complexity, high cost, and inconvenience of existing humidifier humidity adjustment devices. The device has a simple structure, low cost, is easy to use, and is suitable for various working environments. The humidifier humidity adjustment module of this invention utilizes a potentiometer voltage divider circuit to output a voltage signal; the humidity adjustment grading module divides the humidifier humidity adjustment into eight levels through a window comparator; the output signal processing and display module converts the signal into digital and color displays, intuitively indicating the current humidity level. This invention can monitor the humidifier humidity conditions in real time and provide clear visual signals to the user, thereby assisting the user in further assessing their health.

[0004] The technical solution of this utility model is: a digital display circuit for humidifier humidity adjustment, including a humidifier humidity adjustment module 1, a humidity adjustment grading module 2, and an output signal processing and display module 3;

[0005] The humidifier humidity adjustment module 1, humidity adjustment grading module 2, and output signal processing and display module 3 are connected in sequence.

[0006] The humidity adjustment module 1 of the humidifier is adjusted by a sliding rheostat R1, and a voltage signal is generated by the change in the resistance of the sliding rheostat.

[0007] The humidity adjustment grading module 2 is used to receive the voltage signal generated by the humidifier humidity adjustment module 1, and to grade the humidity adjustment based on the voltage signal;

[0008] The output signal processing and display module 3 is used to receive the level signal output by the humidity adjustment grading module 2, and encode the output level signal into a digital signal, which is then displayed through a digital tube and LED.

[0009] As a further embodiment of this utility model, the humidifier humidity adjustment module 1 includes: a voltage source V1, a resistor R2, and a sliding rheostat R1;

[0010] The positive terminal of the voltage source V1 is connected to VCC-1 and one end of the resistor R2; the other end of the resistor R2 is connected in series with the sliding rheostat R1 and connected to the negative terminal of the voltage source V1, and is also connected to GND-1 and ground; the sliding end of the sliding resistor serves as the output terminal In-1 of the humidifier humidity adjustment module 1.

[0011] The output terminal In-1 of the humidifier humidity adjustment module 1 is connected to the input terminal of the humidity adjustment classification module 2.

[0012] As a further embodiment of this utility model, the humidity regulation grading module 2 includes eight sets of window comparators, namely window comparator I, window comparator II, window comparator III, window comparator IV, window comparator V, window comparator VI, window comparator VII, and window comparator VIII; the eight sets of window comparators have the same structure, wherein window comparator I includes resistors R8, R24, R25, R26, R27, and R28; voltage comparators A1 and A2; and diodes D7 and D8;

[0013] The non-inverting terminal of voltage comparator A1 is connected to the inverting terminal of voltage comparator A2 and the output terminal of humidifier humidity adjustment module 1.

[0014] The inverting input of voltage comparator A1 is connected to one end of resistors R8 and R25. The other end of resistor R8 is connected to voltage VCC, and the other end of resistor R25 is grounded. The output of voltage comparator A1 is connected to one end of resistor R27 and the anode of diode D7. The other end of resistor R27 is connected to voltage VCC2, and the cathode of diode D7 is connected to the output terminal In-2.

[0015] The non-inverting input of voltage comparator A2 is connected to one end of resistors R24 and R26. The other end of resistor R24 ​​is connected to voltage VCC, and the other end of resistor R26 is grounded. The output of voltage comparator A2 is connected to one end of resistor R28 and the anode of diode D8. The other end of resistor R28 is connected to voltage VCC2, and the cathode of diode D8 is connected to the output terminal In-2.

[0016] The outputs of window comparators II, III, IV, V, VI, VII, and VIII are In-3, In-4, In-5, In-6, In-7, In-8, and In-9, respectively.

[0017] As a further embodiment of this utility model, the output signal processing and display module 3 includes a 74147N encoder, a 74LS248D decoder, a common cathode seven-segment display, an inverter, and light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8.

[0018] The output terminals In-2, In-3, In-4, In-5, In-6, In-7, In-8, and In-9 of the window comparator of the humidity regulation grading module 2 are connected to the input terminals 1, 2, 3, 4, 5, 6, 7, and 8 of the 74147N encoder, respectively. The input terminal 9 of the 74147N encoder is connected to VCC. The output terminals A, B, C, and D of the 74147N encoder are connected to the input terminals A, B, C, and D of the 74LS248D decoder through inverters, respectively.

[0019] The ~LT, ~RBI, and ~BI / RBO terminals of the 74LS248D decoder are connected to the power supply VCC, respectively. The output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder are connected to the A, B, C, D, E, F, and G terminals of the common cathode seven-segment display, respectively. The CK terminal of the common cathode seven-segment display is grounded.

[0020] The output terminals In-2, In-3, In-4, In-5, In-6, In-7, In-8, and In-9 of the window comparator in the humidity regulation grading module 2 are connected to LEDs LED8, LED7, LED6, LED5, LED4, LED3, LED2, and LED1 respectively via inverters. The cathodes of LEDs LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 are connected to ground.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model provides a humidifier humidity adjustment and display circuit, which achieves precise adjustment and intuitive display of humidifier humidity through the coordinated work of a humidifier humidity adjustment module, a humidity adjustment grading module, and an output signal processing and display module.

[0023] 2. This utility model uses a window comparator to analyze the voltage signal generated by the potentiometer voltage divider circuit, divides the humidity level into eight levels based on these signals, and processes them through an encoder and decoder so that the digital tube and LED system can display the corresponding humidity adjustment level.

[0024] 3. This utility model simplifies the process of adjusting the humidity of a humidifier and provides users with an easy-to-understand and responsive visual indicator, helping observers to understand the humidity of the humidifier in a timely manner and make further adjustments.

[0025] 4. This utility model has a simple structure, low cost and is easy to implement, and is very suitable for various environments such as hospitals, offices and homes. Attached Figure Description

[0026] Figure 1 This is a block diagram of a digital display circuit for humidity adjustment in a humidifier according to this utility model;

[0027] Figure 2 This is a schematic diagram of a digital display circuit for humidity adjustment in a humidifier, according to this utility model.

[0028] Figure 2 The following are the labels: 1-humidifier humidity adjustment module, 2-humidity adjustment level module, 3-output signal processing and display module, A1~A16-voltage comparators, D1~D18-diodes, 74147N-74147N encoder, 74LS248D-74LS248D decoder, LED1~LED8-light-emitting diodes. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1: As Figure 1 As shown, a digital display circuit for humidifier humidity adjustment includes a humidifier humidity adjustment module 1, a humidity adjustment grading module 2, and an output signal processing and display module 3.

[0031] The humidifier humidity adjustment module 1, humidity adjustment grading module 2, and output signal processing and display module 3 are connected in sequence.

[0032] The humidity adjustment module 1 of the humidifier is adjusted by a sliding rheostat R1, and a voltage signal is generated by the change in the resistance of the sliding rheostat.

[0033] The humidity adjustment grading module 2 is used to receive the voltage signal generated by the humidifier humidity adjustment module 1, and to grade the humidity adjustment based on the voltage signal;

[0034] The output signal processing and display module 3 is used to receive the level signal output by the humidity adjustment grading module 2, and encode the output level signal into a digital signal, which is then displayed through a digital tube and LED.

[0035] The humidifier humidity adjustment module 1 includes: a voltage source V1, a resistor R2, and a sliding rheostat R1;

[0036] The positive terminal of the voltage source V1 is connected to VCC-1 and one end of the resistor R2; the other end of the resistor R2 is connected in series with the sliding rheostat R1 and connected to the negative terminal of the voltage source V1, and is also connected to GND-1 and ground; the sliding end of the sliding resistor R1 serves as the output terminal In-1 of the humidifier humidity adjustment module 1.

[0037] The output terminal In-1 of the humidifier humidity adjustment module 1 is connected to the input terminal of the humidity adjustment classification module 2.

[0038] The humidity regulation grading module 2 includes eight sets of window comparators, namely window comparator I, window comparator II, window comparator III, window comparator IV, window comparator V, window comparator VI, window comparator VII, and window comparator VIII. The eight sets of window comparators have the same structure. Among them, window comparator I includes resistors R8, R24, R25, R26, R27, and R28; voltage comparators A1 and A2; and diodes D7 and D8.

[0039] The non-inverting terminal of voltage comparator A1 is connected to the inverting terminal of voltage comparator A2 and the output terminal of humidifier humidity adjustment module 1.

[0040] The inverting input of voltage comparator A1 is connected to one end of resistors R8 and R25. The other end of resistor R8 is connected to voltage VCC, and the other end of resistor R25 is grounded. The output of voltage comparator A1 is connected to one end of resistor R27 and the anode of diode D7. The other end of resistor R27 is connected to voltage VCC2, and the cathode of diode D7 is connected to the output terminal In-2.

[0041] The non-inverting input of voltage comparator A2 is connected to one end of resistors R24 and R26. The other end of resistor R24 ​​is connected to voltage VCC, and the other end of resistor R26 is grounded. The output of voltage comparator A2 is connected to one end of resistor R28 and the anode of diode D8. The other end of resistor R28 is connected to voltage VCC2, and the cathode of diode D8 is connected to the output terminal In-2.

[0042] The outputs of window comparators II, III, IV, V, VI, VII, and VIII are In-3, In-4, In-5, In-6, In-7, In-8, and In-9, respectively.

[0043] The window comparator first needs to determine two threshold voltages, upper and lower. These two thresholds form a "window," and all input signals must fall within this window to be considered valid. When an input signal enters the window comparator, it is compared simultaneously with both the upper and lower thresholds. When the input signal level is between the upper and lower thresholds (i.e., within the comparator's measurement range), the comparator outputs a low-level signal or logic "0". When the input signal level is higher than the upper threshold or lower than the lower threshold (i.e., outside the comparator's measurement range), the comparator outputs a high-level signal or logic "1". Therefore, when light of a certain level enters eight sets of window comparators, only one set will output a low level, while the rest will output a high level.

[0044] The eight windows of the humidity regulation grading module 2 will divide the voltage signal output by the frequency drive module 1 into eight levels.

[0045] Window comparator I measures the regulation level 1 voltage signal, which has a range of 0 to 1.5V.

[0046] Window comparator II measures the regulation level 2 voltage signal, which has a range of 1.5 to 3V.

[0047] Window comparator III measures the regulation level 3 voltage signal, which has a regulation level 3 voltage range of 3–4.5V;

[0048] Window comparator IV measures the regulation level 4 voltage signal, which has a regulation level 4 voltage range of 4.5 to 6V;

[0049] Window comparator V measures the regulation level 5 voltage signal, which has a range of 6–7.5V.

[0050] Window comparator VI measures the regulation level 6 voltage signal, which has a range of 7.5 to 9V.

[0051] Window comparator VII measures the regulation level 7 voltage signal, which has a range of 9–10.5V.

[0052] Window comparator VIII measures the regulation level 8 voltage signal, which has a range of 10.5 to 12V.

[0053] The output signal processing and display module 3 includes a 74147N encoder, a 74LS248D decoder, a common cathode seven-segment display, an inverter, and light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8.

[0054] The output terminals In-2, In-3, In-4, In-5, In-6, In-7, In-8, and In-9 of the window comparator of the humidity regulation grading module 2 are connected to the input terminals 1, 2, 3, 4, 5, 6, 7, and 8 of the 74147N encoder, respectively. The input terminal 9 of the 74147N encoder is connected to VCC. The output terminals A, B, C, and D of the 74147N encoder are connected to the input terminals A, B, C, and D of the 74LS248D decoder through inverters, respectively.

[0055] The ~LT, ~RBI, and ~BI / RBO terminals of the 74LS248D decoder are connected to the power supply VCC, respectively. The output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder are connected to the A, B, C, D, E, F, and G terminals of the common cathode seven-segment display, respectively. The CK terminal of the common cathode seven-segment display is grounded.

[0056] The output terminals In-2, In-3, In-4, In-5, In-6, In-7, In-8, and In-9 of the window comparator in the humidity regulation grading module 2 are connected to LEDs LED8, LED7, LED6, LED5, LED4, LED3, LED2, and LED1 respectively via inverters. The cathodes of LEDs LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 are connected to ground.

[0057] The output signal of the humidity control grading module 2 has only one set of window comparators with a low level output, and the rest are high level. The output of the humidity control grading module 2 is fed into the 8 input terminals of the 74147N encoder. The logic levels output by the 4 output terminals of the 74147N encoder through the inverters are fed into the input terminals of the 74LS248D decoder. After compilation, the 74LS248D decoder outputs logic levels to the 7 input terminals of the digital tube, thereby displaying the numbers.

[0058] The output of the humidity regulation grading module 2 is also connected to eight LEDs of different colors via inverters. The output signal of the humidity regulation grading module 2 is converted from low level to high level by the inverter, and the rest are converted from high level to low level at the output terminal, so only one LED is powered on and illuminates.

[0059] When the voltage signal generated by the humidifier humidity adjustment module 1 is 0~1.5V, after the voltage signal enters the humidity adjustment grading module 2, window comparator I outputs a low level, and the other window comparators output a high level. The output signals of the eight sets of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to the input terminals 1, 2, 3, 4, 5, 6, 7, and 8 of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 1, 0, 0, and 0 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 0, 1, 1, 0, 0, 0, and 0 respectively. Their output logic levels are respectively input to the input terminals A, B, C, D, E, F, and G of the digital tube, thereby displaying the number 1. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator I is converted from 0 to 1 by the inverter, while the logic level of the other window comparators is 0. Therefore, only LED1 is powered on and displays red light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 1 voltage signal.

[0060] When the voltage signal generated by the humidifier humidity adjustment module 1 is 1.5~3V, after the voltage signal enters the humidity adjustment grading module 2, window comparator II outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to the 1, 2, 3, 4, 5, 6, 7, and 8 input terminals of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 0, 0, 1, and 0 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 1, 1, 0, 1, 1, 0, and 1 respectively. Their output logic levels are respectively input to the A, B, C, D, E, F, and G input terminals of the digital tube, thereby displaying the number 2. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator II is converted from 0 to 1 through the inverter, while the logic level of the other window comparators is 0. Therefore, only LED2 is powered on and displays yellow light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 2 voltage signal.

[0061] When the voltage signal generated by the humidifier humidity adjustment module 1 is 3-4.5V, after the voltage signal enters the humidity adjustment grading module 2, window comparator III outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to the 1, 2, 3, 4, 5, 6, 7, and 8 input terminals of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 0, 0, 1, and 1 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 1, 1, 1, 1, 0, 0, and 1 respectively. Their output logic levels are respectively input to the A, B, C, D, E, F, and G input terminals of the digital tube, thereby displaying the number 3. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator III is converted from 0 to 1 through the inverter, while the logic level of the other window comparators is 0. Therefore, only LED3 is powered on and displays green light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 3 voltage signal.

[0062] When the voltage signal generated by the humidifier humidity adjustment module 1 is 4.5~6V, after the voltage signal enters the humidity adjustment grading module 2, window comparator IV outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to the 1, 2, 3, 4, 5, 6, 7, and 8 input terminals of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 0, 1, 0, and 0 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 0, 1, 1, 0, 0, 1, and 1 respectively. Their output logic levels are respectively input to the A, B, C, D, E, F, and G input terminals of the digital tube, thereby displaying the number 4. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator IV changes from 0 to 1 after being invertered, while the logic level of the other window comparators is 0. Therefore, only LED4 is powered on and displays green light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 4 voltage signal.

[0063] When the voltage signal generated by the humidifier humidity adjustment module 1 is 6-7.5V, after the voltage signal enters the humidity adjustment grading module 2, window comparator V outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to the input terminals 1, 2, 3, 4, 5, 6, 7, and 8 of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 0, 1, 0, and 1 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 1, 0, 1, 1, 0, 1, and 1 respectively. Their output logic levels are respectively input to the input terminals A, B, C, D, E, F, and G of the digital tube, thereby displaying the number 5. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator V is converted from 0 to 1 after being invertered, while the logic level of the other window comparators is 0. Therefore, only LED5 is powered on and displays green light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 5 voltage signal.

[0064] When the voltage signal generated by the humidifier humidity adjustment module 1 is 7.5~9V, after the voltage signal enters the humidity adjustment grading module 2, window comparator VI outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to the 1, 2, 3, 4, 5, 6, 7, and 8 input terminals of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 0, 1, 1, and 0 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 0, 0, 1, 1, 1, 1, and 1 respectively. Their output logic levels are respectively input to the A, B, C, D, E, F, and G input terminals of the digital tube, thereby displaying the number 6. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator VI is converted from 0 to 1 by the inverter, while the logic level of the other window comparators is 0. Therefore, only LED6 is powered on and displays green light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 6 voltage signal.

[0065] When the voltage signal generated by the humidifier humidity adjustment module 1 is 9-10.5V, after the voltage signal enters the humidity adjustment grading module 2, window comparator VII outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to input terminals 1, 2, 3, 4, 5, 6, 7, and 8 of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 0, 1, 1, and 1 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 1, 1, 1, 0, 0, 0, and 0 respectively. Their output logic levels are respectively input to the input terminals A, B, C, D, E, F, and G of the digital tube, thereby displaying the number 7. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator VII changes from 0 to 1 after being invertered, while the logic level of the other window comparators is 0. Therefore, only LED7 is powered on and displays yellow light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 7 voltage signal.

[0066] When the voltage signal generated by the humidifier humidity adjustment module 1 is 10.5~12V, after the voltage signal enters the humidity adjustment grading module 2, window comparator VIII outputs a low level, and the other window comparators output a high level. The output signals of window comparators I, II, III, IV, V, VI, VII, and VIII are respectively input to input terminals 1, 2, 3, 4, 5, 6, 7, and 8 of the 74147N encoder. The output terminals A, B, C, and D of the 74147N encoder output logic levels 1, 0, 0, and 0 through inverters and are respectively input to the output terminals A, B, C, and D of the 74LS248D decoder. Then, the output terminals OA, OB, OC, OD, OE, OF, and OG of the 74LS248D decoder generate logic levels 1, 1, 1, 1, 1, 1, and 1 respectively. Their output logic levels are respectively input to the input terminals A, B, C, D, E, F, and G of the digital tube, thereby displaying the number 8. The outputs of window comparators I, II, III, IV, V, VI, VII, and VIII are also connected to LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8 via inverters. At this time, the logic level of window comparator VIII is converted from 0 to 1 after being invertered, while the logic level of the other window comparators is 0. Therefore, only LED8 is powered on and displays red light, indicating that the voltage signal generated by the humidifier humidity adjustment module 1 is the adjustment level 8 voltage signal.

[0067] This utility model's humidity adjustment grading module receives the voltage signal generated by the humidifier's humidity adjustment module and divides it into eight levels. The output signal processing and display module receives the level signal output by the humidity adjustment grading module, encodes it into a digital signal, and displays it through a digital tube and LEDs. Red LEDs represent humidity levels 1 and 8, yellow LEDs represent levels 2 and 7, and green LEDs represent levels 3 to 6. This utility model has a simple structure, is highly responsive, and can intuitively display humidity levels, making it suitable for various occasions where humidifier humidity needs to be monitored.

[0068] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A digital display circuit for a humidifier humidity control, characterized by: The humidifier humidity adjusting module (1), the humidity adjusting grading module (2), and the output signal processing and display module (3) are sequentially connected. The humidifier humidity adjusting module (1), the humidity adjusting grading module (2), and the output signal processing and display module (3) are sequentially connected. The humidifier humidity adjusting module (1) is adjusted by the sliding resistor R1, and a voltage signal is generated by the change of the resistance value of the sliding resistor. The humidity adjusting grading module (2) is used for receiving the voltage signal generated by the humidifier humidity adjusting module (1) and grading the adjusted humidity based on the voltage signal. The output signal processing and display module (3) is used for receiving the level signal output by the humidity adjusting grading module (2) and encoding the output level signal into a digital signal, which is displayed by a number tube and an LED.

2. The digital display circuit for humidifier humidity adjustment according to claim 1, wherein the humidifier humidity adjusting module (1) comprises a voltage source V1, a resistor R2, and a sliding resistor R1. The positive terminal of the voltage source V1 is connected with VCC-1 and one end of the resistor R2, the other end of the resistor R2 is connected with the negative terminal of the voltage source V1 in series with the sliding resistor R1, and the sliding resistor R1 is connected with GND-1 and the ground, and the sliding end of the sliding resistor R1 is used as the output end In-1 of the humidifier humidity adjusting module (1). The output end In-1 of the humidifier humidity adjusting module (1) is connected with the input end of the humidity adjusting grading module (2). The humidity adjusting grading module (2) comprises eight groups of window comparators, which are window comparator I, window comparator II, window comparator III, window comparator IV, window comparator V, window comparator VI, window comparator VII, and window comparator VIII.

3. The digital display circuit for a humidifier humidity control according to claim 1, wherein: The non-inverting terminal of the voltage comparator A1 is connected with the resistor R8 and one end of the resistor R25, the other end of the resistor R8 is connected with the voltage VCC, and the other end of the resistor R25 is connected with the ground; the output end of the voltage comparator A1 is connected with one end of the resistor R27 and the anode of the diode D7, the other end of the resistor R27 is connected with the voltage VCC2, and the cathode of the diode D7 is connected with the output end In-2. The non-inverting terminal of the voltage comparator A2 is connected with the resistor R24 and one end of the resistor R26, the other end of the resistor R24 is connected with the voltage VCC, and the other end of the resistor R26 is connected with the ground; the output end of the voltage comparator A2 is connected with one end of the resistor R28 and the anode of the diode D8, the other end of the resistor R28 is connected with the voltage VCC2, and the cathode of the diode D8 is connected with the output end In-2. ​ ​ The output terminals of the window comparator II, the window comparator III, the window comparator IV, the window comparator V, the window comparator VI, the window comparator VII and the window comparator VIII are In-3, In-4, In-5, In-6, In-7, In-8 and In-9 respectively.

4. The digital display circuit for the humidifier humidity adjustment according to claim 1, characterized in that: The output signal processing and display module (3) comprises a 74147N encoder, a 74LS248D decoder, one common cathode seven-segment LED, inverters and light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7 and LED8; The output terminals In-2, In-3, In-4, In-5, In-6, In-7, In-8 and In-9 of the window comparator of the humidity adjustment grading module (2) are connected with the input terminals 1, 2, 3, 4, 5, 6, 7 and 8 of the 74147N encoder respectively, the input terminal 9 of the 74147N encoder is connected with VCC, and the output terminals A, B, C and D of the 74147N encoder are connected with the input terminals A, B, C and D of the 74LS248D decoder through inverters respectively; The ~LT, ~RBI and ~BI / RBO of the 74LS248D decoder are connected with the power supply VCC respectively, the output terminals OA, OB, OC, OD, OE, OF and OG of the 74LS248D decoder are connected with the A, B, C, D, E, F and G terminals of the common cathode seven-segment LED respectively, and the CK terminal of the common cathode seven-segment LED is grounded; The output terminals In-2, In-3, In-4, In-5, In-6, In-7, In-8 and In-9 of the window comparator of the humidity adjustment grading module (2) are connected with the light-emitting diodes LED8, LED7, LED6, LED5, LED4, LED3, LED2 and LED1 through inverters respectively, and the cathodes of the light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7 and LED8 are connected with the ground.

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