Automatic frequency correction circuit of timer for humidifier

Abstract

The utility model discloses an automatic frequency correction circuit of a timer for a humidifier, which relates to the technical field of household appliances and comprises a main control unit connected with a functional unit. The main control unit comprises a main control circuit, and the main control circuit comprises a main control chip. A universal single chip microcomputer is adopted, the main frequency is modified, the frequency chasing function of the humidifier is achieved, the working duration timer is corrected by means of the main frequency after frequency chasing, and therefore accurate timing can be achieved, the performance of the humidifier is improved in an all-around mode, and more importantly, the innovative scheme remarkably reduces the chip cost, and the cost of the chip is reduced. On the premise of not sacrificing the performance of the humidifier, a powerful cost advantage is provided for large-scale production and wide application of products, so that the humidifier is more competitive in the market, and a choice with higher cost performance is also brought to consumers.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field, especially add humidifier with timer automatic frequency correction circuit. BACKGROUND

[0002] As a kind of can significantly improve indoor air humidity domestic appliance, humidifier plays an important role in daily life, it can effectively improve dry indoor environment, bring many benefits to human health and skin care, whether in office or home and other types of places, especially when winter comes, air is often dry, humidifier becomes a kind of indispensable domestic appliance.

[0003] At present, the humidifier of market is rich in variety, and demand is extremely huge. However, in the prosperity of market behind, there are many problems. Price competition is particularly fierce, common chip scheme usually has frequency generator FPG function inside to realize frequency pursuit, and main frequency remains unchanged, for timing of working time. But to achieve these functions, often need special humidifier chip to realize, which undoubtedly leads to the substantial increase of cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing humidifier with timer automatic frequency correction circuit to solve at least one problem in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: humidifier with timer automatic frequency correction circuit, including main control unit, function unit is connected on the main control unit;

[0006] The main control unit includes main control circuit, and the main control circuit includes main control chip;

[0007] The function unit includes indicating lamp and key circuit, voltage stabilizing circuit, ultrasonic ceramic sheet drive circuit, night light drive circuit, buzzer circuit and fan circuit, and the indicating lamp and key circuit, the voltage stabilizing circuit, the ultrasonic ceramic sheet drive circuit, the night light drive circuit, the buzzer circuit and the fan circuit are all electrically connected with the main control circuit.

[0008] Preferably, the VCC pin of the main control chip is connected with +5V external power supply, one end of capacitor CE2 and one end of third capacitor C3, the other end of capacitor CE2 and the other end of third capacitor C3 are grounded, the XIN pin of the main control chip is connected with S2 end of the indicator light and button circuit, the CMPO pin of the main control chip is connected with S3 end of the button circuit, the VPP pin of the main control chip is connected with PA7, the PWMON pin of the main control chip is connected with one end of fourth resistor R4 and S4 end of the button circuit, the other end of fourth resistor R4 and S4 end of the button circuit are connected, the PWM1O pin of the main control chip is connected with one end of fifth resistor R5 and S5 end of the button circuit, the other end of fifth resistor R5 and S5 end of the button circuit are connected, the INT1 pin of the main control chip is connected with BUZ, the INT0 pin of the main control chip is connected with S6 end of the button circuit, the PB4 pin of the main control chip is connected with PWM end of the ultrasonic ceramic sheet driving circuit, the PB5 pin of the main control chip is connected with W3 of the night light driving circuit, the PB6 pin of the main control chip is connected with W2 end of the night light driving circuit, the PB2 pin of the main control chip is connected with W1 of the night light driving circuit, the PA0 pin of the main control chip is connected with FAN end of the buzzer circuit, the PA3 pin of the main control chip is connected with ISNS end of the ultrasonic ceramic sheet driving circuit, and the VSS pin of the main control chip is grounded.

[0009] Preferably, the indicator light and button circuit comprises a button board, S1 end of the button board is grounded, S2 end of the button board is connected with one end of second resistor R2, one end of KEY1, one end of K-LED, one end of LED2 and one end of LED3, one end of KEY1 is connected with one end of K-LED, the other end of K-LED is grounded, S3 end of the button board is connected with one end of third resistor R3, one end of KEY3, one end of K-TIME and one end of LED1, the other end of third resistor R3 is connected with one end of KEY3, the other end of KEY3 is connected with one end of K-TIME, the other end of K-TIME is grounded, S4 end of the button board is connected with the other end of LED1 and the other end of LED2, S5 end of the button board is connected with the other end of LED3, S6 end of the button board is connected with one end of KEY2 and one end of K-LEVEL, the other end of KEY2 is connected with one end of K-LEVEL, the other end of K-LEVEL is grounded.

[0010] Preferably, the voltage stabilizing circuit comprises J1 chip and U1 chip, and J1 chip and U1 chip are connected.

[0011] The first pin of the J1 chip is connected with one end of CE1, one end of the first capacitor C1, one end of the first resistor R1 and the VIN pin of the U1 chip, the other end of CE1 is grounded, the first capacitor C1 is grounded, one end of the first capacitor C1 is connected with one end of the first resistor R1, the other end of the first resistor R1 is connected with one end of the second capacitor C2, the other end of the second capacitor C2 is grounded, the second pin of the J1 chip is not connected, the third pin of the J1 chip is grounded and the other end of the first capacitor C1 is connected;

[0012] The VOUT pin of the U1 chip is connected with one end of the tenth capacitor C10, an external power supply +5V and one end of the tenth capacitor C11, one end of the tenth capacitor C10 is connected with one end of the tenth capacitor C11, and the other end of the tenth capacitor C10 and the other end of the tenth capacitor C11 are both grounded.

[0013] Preferably, the ultrasonic ceramic sheet driving circuit comprises a J1 chip;

[0014] The first pin of the J1 chip is connected with one end of the fifth capacitor C5, one end of the seventh capacitor C7, D1, one end of the fourth capacitor C4, one end of the eighth resistor R8, one end of the seventh resistor R7, an external power supply +24V, one end of L1, one end of Q1, one end of the nineteenth resistor R19, one end of the eighteenth resistor R18 and PWM, the other end of the fifth capacitor is connected with one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is grounded, the other end of the fifth capacitor C5 is connected with one end of D1, the other end of D1 is connected with one end of the fourth capacitor C4 and one end of the eighth resistor R8, the other end of the seventh resistor R7 is connected with the other end of the eighth resistor R8, the other end of the eighth resistor R8 is connected with the other end of the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with one end of L1, one end of L1 is connected with one end of Q1, one end of Q1 is connected with one end of the nineteenth resistor R19, the other end of the nineteenth resistor R19 is connected with the other end of D2, the other end of the nineteenth resistor R19 is connected with PWM, and one end of the eighteenth resistor R18 is connected with one end of the nineteenth resistor R19;

[0015] The second pin of the J1 chip is connected with one end of the twenty-second resistor R22, one end of the twenty-first resistor R21, one end of the ninth capacitor C9 and the ISNS end, one end of the twenty-second resistor R22 is connected with the other end of the Q1, one end of the twenty-second resistor R22 is connected with one end of the twenty-first resistor R21, one end of the twenty-first resistor R21 is connected with one end of the twentieth resistor R20, the other end of the twentieth resistor R20 is connected with the ISNS and the other end of the ninth capacitor C9, and the other end of the ninth capacitor C9, the other end of the twenty-first resistor R21 and the other end of the twenty-second resistor R22 are all connected with the ground.

[0016] Preferably, the night lamp driving circuit comprises a U4 chip and a tenth resistor R10, a tenth resistor R11 and a twelfth resistor R12, one end of the tenth resistor R10, the tenth resistor R11 and the twelfth resistor R12 is connected with the external power supply +24V, the other end of the tenth resistor R10 is connected with one end of the LED4, the other end of the LED4 is connected with one end of the LED5, the other end of the LED5 is connected with one end of the LED6, the other end of the LED6 is connected with the 1C pin of the U4 chip, the other end of the tenth resistor R11 is connected with one end of the LED9, the other end of the LED9 is connected with one end of the LED8, the other end of the LED8 is connected with one end of the LED7, the other end of the LED7 is connected with the 2C pin of the U4 chip, the other end of the twelfth resistor R12 is connected with one end of the LED12, the other end of the LED12 is connected with one end of the LED11, the other end of the LED11 is connected with one end of the LED10, the other end of the LED10 is connected with the 3C pin of the U4 chip, the 1B pin of the U4 chip is connected with the W1 end, the 2B pin of the U4 chip is connected with the W2 end, the 3B pin of the U4 chip is connected with the W3 end, and the E pin of the U4 chip is connected with the ground.

[0017] Preferably, the buzzer circuit comprises a buzzer body, one end of the buzzer body is connected with the ground, and the other end of the buzzer body is connected with one end of the sixth resistor R6 and the BUZ end; the other end of the sixth resistor R6 is connected with the BUZ end.

[0018] Preferably, the fan circuit comprises a J3 chip, one end of the ninth resistor R9 is connected with the external power supply +24V, the other end of the ninth resistor R9 is connected with the external power supply +24V, one end of the Q2, one end of the fourteenth resistor R14 and the FAN end are connected with the second pin of the J3 chip, one end of the Q2 is connected with one end of the fourteenth resistor R14, the other end of the Q2 is connected with the ground, one end of the fourteenth resistor R14 is connected with the ground, and the other end of the fourteenth resistor R14 is connected with the FAN end.

[0019] The utility model discloses the following beneficial effects:

[0020] In this utility model, a general-purpose single-chip microcomputer is creatively adopted to realize the frequency tracking function of the humidifier by modifying the main frequency, and the working time timer is corrected with the help of the main frequency after frequency tracking, so as to achieve precise timing and comprehensively improve the performance of the humidifier. More importantly, this innovative solution significantly reduces the chip cost, and provides a strong cost advantage for the large-scale production and wide application of the product without sacrificing the performance of the humidifier, making the humidifier more competitive in the market and bringing consumers a more cost-effective choice. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram summarizing the circuit of the utility model;

[0022] Figure 2 This is a schematic diagram of the indicator light and button circuit of the utility model;

[0023] Figure 3 This is a schematic diagram of the voltage stabilizing circuit of the utility model;

[0024] Figure 4 This is a schematic diagram of the ultrasonic ceramic chip driving circuit of the utility model;

[0025] Figure 5 This is a schematic diagram of the night light driving circuit of the utility model;

[0026] Figure 6 This is a schematic diagram of the buzzer circuit of the utility model;

[0027] Figure 7 This is a schematic diagram of the fan circuit of the utility model;

[0028] Figure 8 This is a schematic diagram of the main control circuit of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] The utility model provides Figures 1-8The humidifier timer automatic frequency correction circuit shown, including the master control unit, the master control unit is connected with the function unit;The master control unit includes a master control circuit, the master control circuit includes a master control chip;The function unit includes an indicator light and a key circuit, a voltage stabilizing circuit, an ultrasonic ceramic piece driving circuit, a night light driving circuit, a buzzer circuit and a fan circuit, the indicator light and the key circuit, the voltage stabilizing circuit, the ultrasonic ceramic piece driving circuit, the night light driving circuit, the buzzer circuit and the fan circuit are electrically connected with the master control circuit, the VCC pin of the master control chip is connected with +5V external power supply, one end of the capacitor CE2 and one end of the third capacitor C3, the other end of the capacitor CE2 and the other end of the third capacitor C3 are grounded, the XIN pin of the master control chip is connected with the S2 end of the indicator light and the button circuit, the CMPO pin of the master control chip is connected with the S3 end of the button circuit, the VPP pin of the master control chip is connected with PA7, the PWMON pin of the master control chip is connected with one end of the fourth resistor R4 and the S4 end of the button circuit, the other end of the fourth resistor R4 and the S4 end of the button circuit are connected, the PWM1O pin of the master control chip is connected with one end of the fifth resistor R5 and the S5 end of the button circuit, the other end of the fifth resistor R5 and the S5 end of the button circuit are connected, the INT1 pin of the master control chip is connected with BUZ, the INT0 pin of the master control chip is connected with the S6 end of the button circuit, the PB4 pin of the master control chip is connected with the PWM end of the ultrasonic ceramic piece driving circuit, the PB5 pin of the master control chip is connected with the W3 of the night light driving circuit, the PB6 pin of the master control chip is connected with the W2 end of the night light driving circuit, the PB2 pin of the master control chip is connected with the W1 of the night light driving circuit, the PA0 pin of the master control chip is connected with the FAN end of the buzzer circuit, the PA3 pin of the master control chip is connected with the ISNS end of the ultrasonic ceramic piece driving circuit, and the VSS pin of the master control chip is grounded.The master control circuit integrates touch, LCD drive and sleep extremely low power consumption and other functions, the touch function makes the operation more convenient and intuitive, the LCD drive can clearly show the working state and related parameters, and the sleep extremely low power consumption characteristics greatly reduces the energy consumption when the device is on standby, realizes the perfect combination of energy saving and high efficiency.

[0031] The indicator light and key circuit comprises a key pad, the S1 end of the key pad is grounded, the S2 end of the key pad is connected with one end of a second resistor R2, one end of a KEY1, one end of a K-LED, one end of a LED2 and one end of a LED3, one end of the KEY1 is connected with one end of the K-LED, the other end of the K-LED is grounded, the S3 end of the key pad is connected with one end of a third resistor R3, one end of a KEY3, one end of a K-TIME and one end of a LED1, the other end of the third resistor R3 is connected with one end of the KEY3, the other end of the KEY3 is connected with one end of the K-TIME, the other end of the K-TIME is grounded, the S4 end of the key pad is connected with the other end of the LED1 and the other end of the LED2, the S5 end of the key pad is connected with the other end of the LED3, the S6 end of the key pad is connected with one end of a KEY2 and one end of a K-LEVE, the other end of the KEY2 is connected with one end of the K-LEVE, and the other end of the K-LEVE is grounded. The design realizes the optimized use of resources, and improves the overall performance of the circuit and the convenience of operation.

[0032] The voltage stabilizing circuit comprises a J1 chip and a U1 chip, and the J1 chip is connected with the U1 chip.

[0033] The first pin of the J1 chip is connected with one end of a CE1, one end of a first capacitor C1, one end of a first resistor R1 and a VIN pin of the U1 chip, the other end of the CE1 is grounded, the first capacitor C1 is grounded, one end of the first capacitor C1 is connected with one end of the first resistor R1, the other end of the first resistor R1 is connected with one end of a second capacitor C2, the other end of the second capacitor C2 is grounded, the second pin of the J1 chip is not connected, and the third pin of the J1 chip is grounded and connected with the other end of the first capacitor C1.

[0034] The VOUT pin of the U1 chip is connected with one end of a tenth capacitor C10, an external power supply +5V and one end of a tenth capacitor C11, one end of the tenth capacitor C10 is connected with one end of the tenth capacitor C11, and the other end of the tenth capacitor C10 and the other end of the tenth capacitor C11 are both grounded. The voltage stabilizing circuit is supplied with power by LDO voltage reduction to 5V, effectively ensuring that the main control circuit can obtain stable and suitable voltage, and providing solid power guarantee for stable operation of the whole system.

[0035] The ultrasonic ceramic sheet driving circuit comprises a J1 chip.

[0036] The first pin of the J1 chip is connected with one end of the fifth capacitor C5, one end of the seventh capacitor C7, D1, one end of the fourth capacitor C4, one end of the eighth resistor R8, one end of the seventh resistor R7, an external power supply +24V, one end of L1, one end of Q1, one end of the nineteenth resistor R19, one end of the eighteenth resistor R18 and PWM, the other end of the fifth capacitor is connected with one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is grounded, one end of the fifth capacitor C5 is connected with one end of D1, the other end of D1 is connected with one end of the fourth capacitor C4 and one end of the eighth resistor R8, the other end of the seventh resistor R7 is connected with the other end of the eighth resistor R8, the other end of the eighth resistor R8 is connected with the other end of the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with one end of L1, one end of Q1 is connected with one end of the nineteenth resistor R19, the other end of the nineteenth resistor R19 is connected with the other end of D2, the other end of the nineteenth resistor R19 is connected with PWM, and one end of the eighteenth resistor R18 is connected with one end of the nineteenth resistor R19.

[0037] The second pin of the J1 chip is connected with one end of the twenty-second resistor R22, one end of the twenty-first resistor R21, one end of the ninth capacitor C9 and ISNS, one end of the twenty-second resistor R22 is connected with the other end of Q1, one end of the twenty-second resistor R22 is connected with one end of the twenty-first resistor R21, one end of the twenty-first resistor R21 is connected with one end of the twentieth resistor R20, the other end of the twentieth resistor R20 is connected with ISNS and the other end of the ninth capacitor C9, the other end of the ninth capacitor C9, the other end of the twenty-first resistor R21 and the other end of the twenty-second resistor R22 are all grounded. The ultrasonic ceramic sheet driving circuit has the functions of frequency tracking, water detection and dry burning prevention. The frequency tracking function can ensure efficient operation of the ceramic sheet, the water detection function can monitor the water level in real time, and the dry burning prevention function greatly improves the safety of use, and comprehensively enhances the reliability and stability of the humidifier.

[0038] The night light driving circuit comprises a U4 chip and a tenth resistor R10, a tenth resistor R11 and a twelfth resistor R12, one end of the tenth resistor R10, the tenth resistor R11 and the twelfth resistor R12 is connected with an external power supply +24V, the other end of the tenth resistor R10 is connected with one end of an LED4, the other end of the LED4 is connected with one end of an LED5, the other end of the LED5 is connected with one end of an LED6, the other end of the LED6 is connected with a 1C pin of the U4 chip, the other end of the tenth resistor R11 is connected with one end of an LED9, the other end of the LED9 is connected with one end of an LED8, the other end of the LED8 is connected with one end of an LED7, the other end of the LED7 is connected with a 2C pin of the U4 chip, the other end of the twelfth resistor R12 is connected with one end of an LED12, the other end of the LED12 is connected with one end of an LED11, the other end of the LED11 is connected with one end of an LED10, the other end of the LED10 is connected with a 3C pin of the U4 chip, a 1B pin of the U4 chip is connected with a W1 end, a 2B pin of the U4 chip is connected with a W2 end, a 3B pin of the U4 chip is connected with a W3 end, and an E pin of the U4 chip is grounded. The night light driving circuit can accurately control the night light, provide a suitable lighting environment for users at night, and improve the use experience and practicality of the product.

[0039] The buzzer circuit comprises a buzzer body, one end of the buzzer body is grounded, and the other end of the buzzer body is connected with one end of a sixth resistor R6 and a BUZ end, and the other end of the sixth resistor R6 is connected with the BUZ end. The buzzer circuit can emit a prompt sound through the buzzer, timely convey information of various working states or abnormal conditions to the user, so that the user can quickly respond.

[0040] The fan circuit comprises a J3 chip, a first pin of the J3 chip is connected with one end of a ninth resistor R9 and an external power supply +24V, the other end of the ninth resistor R9 is connected with the external power supply +24V, a second pin of the J3 chip is connected with one end of a Q2, one end of a fourteenth resistor R14 and a FAN end, one end of the Q2 is connected with one end of the fourteenth resistor R14, the other end of the Q2 is grounded, one end of the fourteenth resistor R14 is grounded, and the other end of the fourteenth resistor R14 is connected with the FAN end. The fan driving circuit can effectively blow the water mist generated by the ceramic sheet into the air, promote the uniform diffusion of the water mist, and improve the humidification effect and coverage range.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A timer automatic frequency correction circuit for a humidifier, characterized by: The main control unit is connected with a function unit; The main control unit comprises a main control circuit, and the main control circuit comprises a main control chip; The function unit comprises an indicating lamp and button circuit, a voltage stabilizing circuit, an ultrasonic ceramic piece driving circuit, a night lamp driving circuit, a buzzer circuit and a fan circuit, and the indicating lamp and button circuit, the voltage stabilizing circuit, the ultrasonic ceramic piece driving circuit, the night lamp driving circuit, the buzzer circuit and the fan circuit are electrically connected with the main control circuit.

2. The timer automatic frequency correction circuit for a humidifier according to claim 1, characterized by: The VCC pin of the main control chip is connected with a +5V external power supply, one end of a capacitor CE2 and one end of a third capacitor C3, the other end of the capacitor CE2 and the other end of the third capacitor C3 are grounded, the XIN pin of the main control chip is connected with the S2 end of the indicating lamp and button circuit, the CMPO pin of the main control chip is connected with the S3 end of the button circuit, the VPP pin of the main control chip is connected with PA7, the PWMON pin of the main control chip is connected with one end of a fourth resistor R4 and the S4 end of the button circuit, the other end of the fourth resistor R4 is connected with the S4 end of the button circuit, the PWM1O pin of the main control chip is connected with one end of a fifth resistor R5 and the S5 end of the button circuit, the other end of the fifth resistor R5 is connected with the S5 end of the button circuit, the INT1 pin of the main control chip is connected with BUZ, the INT0 pin of the main control chip is connected with the S6 end of the button circuit, the PB4 pin of the main control chip is connected with the PWM end of the ultrasonic ceramic piece driving circuit, the PB5 pin of the main control chip is connected with W3 of the night lamp driving circuit, the PB6 pin of the main control chip is connected with the W2 end of the night lamp driving circuit, the PB2 pin of the main control chip is connected with W1 of the night lamp driving circuit, the PA0 pin of the main control chip is connected with the FAN end of the buzzer circuit, the PA3 pin of the main control chip is connected with the ISNS end of the ultrasonic ceramic piece driving circuit, and the VSS pin of the main control chip is grounded.

3. The humidifier timer auto frequency correction circuit according to claim 1, wherein: The indicator light and button circuit comprises a button plate, the S1 end of the button plate is grounded, the S2 end of the button plate is electrically connected with one end of a second resistor R2, one end of a KEY1, one end of a K-LED, one end of a LED2 and one end of a LED3, one end of the KEY1 is connected with one end of the K-LED, the other end of the K-LED is grounded, the S3 end of the button plate is connected with one end of a third resistor R3, one end of a KEY3, one end of a K-TIME and one end of a LED1, one end of the third resistor R3 is connected with one end of the KEY3, the other end of the KEY3 is connected with one end of the K-TIME, the other end of the K-TIME is grounded, the S4 end of the button plate is connected with the other end of the LED1 and the other end of the LED2, the S5 end of the button plate is connected with the other end of the LED3, the S6 end of the button plate is connected with one end of a KEY2 and one end of a K-LEVE, the other end of the KEY2 is connected with one end of the K-LEVE, the other end of the K-LEVE is grounded.

4. The humidifier timer auto frequency correction circuit according to claim 1, wherein: The voltage stabilizing circuit comprises a J1 chip and a U1 chip, the J1 chip is connected with the U1 chip; the first pin of the J1 chip is connected with one end of a CE1, one end of a first capacitor C1, one end of a first resistor R1 and a VIN pin of the U1 chip, the other end of the CE1 is grounded, the first capacitor C1 is grounded, one end of the first capacitor C1 is connected with one end of the first resistor R1, the other end of the first resistor R1 is connected with one end of a second capacitor C2, the other end of the second capacitor C2 is grounded, the second pin of the J1 chip is not connected, the third pin of the J1 chip is grounded and the other end of the first capacitor C1; the VOUT pin of the U1 chip is connected with one end of a tenth capacitor C10, an external power supply +5V and one end of a tenth capacitor C11, one end of the tenth capacitor C10 is connected with one end of the tenth capacitor C11, the other end of the tenth capacitor C10 and the other end of the tenth capacitor C11 are both grounded.

5. The humidifier timer auto frequency correction circuit according to claim 1, wherein: The ultrasonic ceramic sheet driving circuit comprises a J1 chip; The first pin of the J1 chip is connected with one end of the fifth capacitor C5, one end of the seventh capacitor C7, D1, one end of the fourth capacitor C4, one end of the eighth resistor R8, one end of the seventh resistor R7, an external power supply +24V, one end of L1, one end of Q1, one end of the nineteenth resistor R19, one end of the eighteenth resistor R18 and PWM, the other end of the fifth capacitor C5 is connected with one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is grounded, one end of the fifth capacitor C5 is connected with one end of D1, the other end of D1 is connected with one end of the fourth capacitor C4 and one end of the eighth resistor R8, the other end of the seventh resistor R7 is connected with the other end of the eighth resistor R8, the other end of the eighth resistor R8 is connected with the other end of the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with one end of L1, one end of L1 is connected with one end of Q1, one end of Q1 is connected with one end of the nineteenth resistor R19, the other end of the nineteenth resistor R19 is connected with the other end of D2, the other end of the nineteenth resistor R19 is connected with PWM, and one end of the eighteenth resistor R18 is connected with one end of the nineteenth resistor R19; The second pin of the J1 chip is connected with one end of the twenty-second resistor R22, one end of the twenty-first resistor R21, one end of the ninth capacitor C9 and ISNS, one end of the twenty-second resistor R22 is connected with the other end of Q1, one end of the twenty-second resistor R22 is connected with one end of the twenty-first resistor R21, one end of the twenty-first resistor R21 is connected with one end of the twentieth resistor R20, the other end of the twentieth resistor R20 is connected with ISNS and the other end of the ninth capacitor C9, the other end of the ninth capacitor C9, the other end of the twenty-first resistor R21 and the other end of the twenty-second resistor R22 are all grounded.

6. The humidifier timer auto frequency correction circuit according to claim 1, wherein: The night lamp driving circuit includes U4 chip and tenth resistor R10, tenth resistor R11 and twelfth resistor R12, one end of the tenth resistor R10, the tenth resistor R11 and the twelfth resistor R12 is connected with external power supply +24V, the other end of the tenth resistor R10 is connected with one end of LED4, the other end of LED4 is connected with one end of LED5, the other end of LED5 is connected with one end of LED6, the other end of LED6 is connected with 1C pin of the U4 chip, the other end of the tenth resistor R11 is connected with one end of LED9, the other end of LED9 is connected with one end of LED8, the other end of LED8 is connected with one end of LED7, the other end of LED7 is connected with 2C pin of the U4 chip, the other end of twelfth resistor R12 is connected with one end of LED12, the other end of LED12 is connected with one end of LED11, the other end of LED11 is connected with one end of LED10, the other end of LED10 is connected with 3C pin of the U4 chip, 1B pin of the U4 chip is connected with W1 end, 2B pin of the U4 chip is connected with W2 end, 3B pin of the U4 chip is connected with W3 end, E pin of the U4 chip is grounded.

7. The humidifier timer auto frequency correction circuit according to claim 1, wherein: The buzzer circuit includes buzzer body, one end of the buzzer body is grounded, the other end of the buzzer body is connected with one end of sixth resistor R6 and BUZ end, the other end of the sixth resistor R6 is connected with BUZ end.

8. The humidifier timer auto frequency correction circuit according to claim 1, wherein: The fan circuit includes J3 chip, the first pin of the J3 chip is connected with one end of ninth resistor R9 and external power supply +24V, the other end of the ninth resistor R9 is connected with external power supply +24V, the second pin of the J3 chip is connected with one end of Q2, one end of fourteenth resistor R14 and FAN end, one end of Q2 is connected with one end of fourteenth resistor R14, the other end of Q2 is grounded, one end of the fourteenth resistor R14 is grounded, the other end of the fourteenth resistor R14 is connected with FAN end.

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