Atomizer and spray rate control circuit thereof

Abstract

The utility model discloses an atomizer and a spray rate control circuit thereof. The spray rate control circuit of the atomizer comprises a main control module, a boosting module, an atomization driving module and a current sampling module, and the boosting module is used for realizing a boosting function and outputting different voltages under the control of the main control module to meet voltage values required by different working rates of an atomization sheet; the atomization driving module is used for generating voltage waveforms with different frequencies under the control of the main control module so as to drive an atomization sheet, and the current sampling module is used for detecting current flowing through the atomization sheet and sending a detection result to the main control module. The main control module controls the booster circuit to output different voltages and provide power supply voltage for the atomization piece, the higher the power supply voltage of the atomization piece is, the higher the spraying speed is, the larger the mist output is, control over the spraying speed of the atomizer is achieved, the spraying speed can be flexibly adjusted, applicability is high, and the requirements of different customers in the market can be met.

Description

Technical Field

[0001] This utility model relates to the field of atomizer technology, and in particular to an atomizer and its spray rate control circuit. Background Technology

[0002] Currently, there are many types of atomizers on the market, with wide applications. However, most products only have a single spray rate and cannot flexibly adjust the spray rate, thus failing to meet the diverse needs of customers in the market. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an atomizer with flexible adjustable spray rate and its spray rate control circuit.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A spray rate control circuit for an atomizer includes a main control module, a boost module, an atomization drive module, and a current sampling module. The boost module is used to implement a boost function and output different voltages under the control of the main control module to meet the voltage values ​​required for different working rates of the atomizing plate. The atomization drive module is used to generate voltage waveforms of different frequencies under the control of the main control module to drive the atomizing plate. The current sampling module is used to detect the current flowing through the atomizing plate and send the detection result to the main control module.

[0006] Preferably, the boost module includes an inductor L1, resistors R1 and R2, a MOSFET Q1, a diode D1, an electrolytic capacitor E1, and a capacitor C2. One end of the inductor L1 is connected to the power supply voltage, and the other end of the inductor L1 is connected to the anode of the diode D1. The drain of the MOSFET Q1 is connected between the other end of the inductor L1 and the anode of the diode D1. The source of the MOSFET Q1 is grounded. The gate of the MOSFET Q1 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the main control module. One end of the resistor R2 is connected between one end of the resistor R1 and the gate of the MOSFET Q1, and the other end of the resistor R2 is grounded. The positive terminal of the electrolytic capacitor E1 is connected to the cathode of the diode D1, and the negative terminal of the electrolytic capacitor E1 is grounded. The capacitor C2 is connected in parallel with the electrolytic capacitor E1.

[0007] Preferably, the main control module uses a chip U1 with model number CMS8S6990N, and the other end of the resistor R1 is connected to the P23 pin of the chip U1. The boost module realizes the boost function by adjusting the PWM output of the P23 pin of the chip U1.

[0008] Preferably, the PWM output frequency of the P23 pin of the chip U1 is 20kHz to 50kHz.

[0009] Preferably, the atomization driving module includes a three-pin inductor L2, resistors R3, R4, and R5, and a MOSFET Q2. Pin 1 of the three-pin inductor L2 is connected to the positive output terminal of the boost module; pin 2 of the three-pin inductor L2 is connected to the positive terminal of the atomizing plate; pin 3 of the three-pin inductor L2 is connected to the negative terminal of the atomizing plate; the drain of the MOSFET Q2 is connected between pin 2 of the three-pin inductor L2 and the positive terminal of the atomizing plate; the source of the MOSFET Q2 is grounded through resistor R5; the gate of the MOSFET Q2 is connected to one end of resistor R3; the other end of resistor R3 is connected to the main control module; one end of resistor R4 is connected between one end of resistor R3 and the gate of the MOSFET Q2; and the other end of resistor R4 is grounded.

[0010] Preferably, the main control module uses a chip U1 with model number CMS8S6990N. The other end of the resistor R3 is connected to the P22 pin of the chip U1. The atomization driving module generates a PWM square wave through the P22 pin of the chip U1, and combines it with the inductor L2 to generate the voltage waveform required to drive the atomizing plate, so as to realize the driving of the atomizing plate.

[0011] Preferably, the current sampling module includes a resistor R6 and a capacitor C3; one end of the resistor R6 is connected between the source of the MOS transistor Q2 and the resistor R5, and the other end of the resistor R6 is connected to the main control module; one end of the capacitor C3 is grounded, and the other end of the capacitor C3 is connected to the main control module.

[0012] Preferably, the main control module uses a chip U1 with model number CMS8S6990N, and the other end of the resistor R6 is connected to the P21 pin of the chip U1. The current sampling module performs AD sampling through the P21 pin of the chip U1 to detect the magnitude of the current flowing through the atomizing sheet.

[0013] An atomizer includes a spray rate control circuit for the atomizer described above.

[0014] The beneficial technical effects of this utility model are as follows: The spray rate control circuit of the above-mentioned atomizer includes a main control module, a boost module, an atomization drive module, and a current sampling module. The main control module controls the boost circuit to output different voltages to provide power supply voltage to the atomizing plate. The higher the power supply voltage of the atomizing plate, the faster the spray rate and the greater the amount of mist produced. This realizes the control of the spray rate of the atomizer, which can flexibly adjust the spray rate, has strong applicability, and can meet the needs of different customers in the market. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the spray rate control circuit of the atomizer of this utility model;

[0016] Figure 2 This is a circuit diagram of the spray rate control circuit of the atomizer of this utility model;

[0017] Figure 3 This is a circuit diagram of the main control module of the spray rate control circuit of the atomizer of this utility model. Detailed Implementation

[0018] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] This utility model embodiment provides a spray rate control circuit for an atomizer.

[0020] like Figure 1 As shown, in one embodiment of this utility model, the spray rate control circuit of the atomizer includes a main control module 10, a boost module 20, an atomization drive module 30, and a current sampling module 40. The boost module 20 is used to implement the boost function and output different voltages under the control of the main control module 10 to meet the voltage values ​​required for different working rates of the atomizing plate 100. The atomization drive module 30 is used to generate voltage waveforms of different frequencies under the control of the main control module 10 to drive the atomizing plate 100. The current sampling module 40 is used to detect the current flowing through the atomizing plate 100 and send the detection result to the main control module 10.

[0021] In a preferred embodiment of this utility model, such as Figure 2 , 3As shown, the boost module 20 includes an inductor L1, resistors R1 and R2, a MOSFET Q1, a diode D1, an electrolytic capacitor E1, and a capacitor C2. One end of the inductor L1 is connected to the power supply voltage (+5V), and the other end of the inductor L1 is connected to the anode of the diode D1. The drain of the MOSFET Q1 is connected between the other end of the inductor L1 and the anode of the diode D1. The source of the MOSFET Q1 is grounded. The gate of the MOSFET Q1 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the main control module 10. One end of the resistor R2 is connected between one end of the resistor R1 and the gate of the MOSFET Q1, and the other end of the resistor R2 is grounded. The positive terminal of the electrolytic capacitor E1 is connected to the cathode of the diode D1, and the negative terminal of the electrolytic capacitor E1 is grounded. The capacitor C2 is connected in parallel with the electrolytic capacitor E1. The main control module 10 uses a CMS8S6990N chip U1. The other end of the resistor R1 is connected to pin P23 of the chip U1. The boost module 20 achieves the boost function by adjusting the PWM output of pin P23 of the chip U1. It should be noted that in other embodiments, the main control module 10 may use other chips similar to the CMS8S6990N.

[0022] The PWM output frequency of pin P23 of chip U1 is 20kHz to 50kHz. By adjusting the positive duty cycle (range: 20%-80%) of the PWM output from pin P23, the boost circuit outputs different voltages (PWR) to provide power to the atomizing plate. The higher the supply voltage (PWR) of the atomizing plate, the faster the spray rate and the greater the mist output. In other words, by adjusting the positive duty cycle (PWR) of the PWM output from pin P23, the spray rate of the atomizer is controlled.

[0023] In a preferred embodiment of this utility model, such as Figure 2 , 3As shown, the atomization driving module 30 includes a three-pin inductor L2, resistors R3, R4, and R5, and a MOSFET Q2. Pin 1 of the three-pin inductor L2 is connected to the positive terminal (cathode of diode D1) of the boost module 20. Pin 2 of the three-pin inductor L2 is connected to the positive terminal (WU+) of the atomizing plate 100. Pin 3 of the three-pin inductor L2 is connected to the negative terminal (WU-) of the atomizing plate 100. The drain of the MOSFET Q2 is connected between pin 2 of the three-pin inductor L2 and the positive terminal of the atomizing plate 100. The source of the MOSFET Q2 is grounded through resistor R5. The gate of the MOSFET Q2 is connected to one end of resistor R3, and the other end of resistor R3 is connected to the main control module 10. One end of resistor R4 is connected between one end of resistor R3 and the gate of the MOSFET Q2, and the other end of resistor R4 is grounded. The main control module 10 uses a chip U1 with model number CMS8S6990N. The other end of the resistor R3 is connected to the P22 pin of the chip U1. The atomization driving module 30 generates a PWM square wave through the P22 pin of the chip U1, and combines it with the inductor L2 to generate the voltage waveform required to drive the atomizing plate, so as to drive the atomizing plate 100.

[0024] In a preferred embodiment of this utility model, such as Figure 2 , 3 As shown, the current sampling module 40 includes a resistor R6 and a capacitor C3. One end of the resistor R6 is connected between the source of the MOSFET Q2 and the resistor R5, and the other end of the resistor R6 is connected to the main control module 10. One end of the capacitor C3 is grounded, and the other end of the capacitor C3 is connected to the main control module 10. The main control module 10 uses a CMS8S6990N chip U1. The other end of the resistor R6 is connected to the P21 pin of the chip U1. The current sampling module 40 performs AD sampling through the P21 pin of the chip U1 to detect the magnitude of the current flowing through the atomizing sheet 100.

[0025] This invention, when driving the atomizing plate 100, finds its optimal operating frequency through frequency sweeping and drives the atomizing plate 100 at this optimal frequency. The frequency sweeping process is as follows: the selected atomizing plate 100 frequency is 120±5kHz. During the frequency sweep, the PWM frequency and duty cycle output from pin P23 of the boost circuit 20 remain constant. The PWM frequency output from pin P22 of chip U1 is switched sequentially from 110kHz to 130kHz. At each frequency, AD sampling is performed through pin P21 of chip U1 to detect and compare the current magnitude corresponding to each frequency. The frequency with the highest current during the frequency sweep indicates the best spray effect; therefore, the frequency corresponding to the highest current is the optimal operating frequency of the atomizing plate 100. After the frequency sweep, the atomizing plate 100 is driven normally at the optimal operating frequency.

[0026] This utility model embodiment also provides an atomizer, which includes... Figure 1-3 The spray rate control circuit of the atomizer in the illustrated embodiment.

[0027] In summary, this invention controls the output voltage of the boost circuit by adjusting the positive duty cycle (Duty) value of the PWM output from the P23 pin of the chip. This provides a power supply voltage to the atomizing plate. The higher the power supply voltage to the atomizing plate, the faster the spray rate and the greater the mist output. In other words, by adjusting the positive duty cycle (Duty) value of the PWM output from the P23 pin of the chip, the spray rate of the atomizer is controlled. This allows for flexible adjustment of the spray rate, making it highly adaptable and able to meet the needs of different customers in the market. Furthermore, the spray rate control circuit of the atomizer has a simple circuit structure and occupies little space, which is beneficial for product miniaturization and reduced production costs.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments. All equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the present utility model.

Claims

1. A spray rate control circuit for an atomizer, characterized in that: It includes a main control module, a boost module, an atomization drive module, and a current sampling module. The boost module is used to implement the boost function and output different voltages under the control of the main control module to meet the voltage values ​​required for different working speeds of the atomizing plate. The atomization drive module is used to generate voltage waveforms of different frequencies under the control of the main control module to drive the atomizing plate. The current sampling module is used to detect the current flowing through the atomizing plate and send the detection results to the main control module.

2. The spray rate control circuit for the atomizer as described in claim 1, characterized in that: The boost module includes an inductor L1, resistors R1 and R2, a MOSFET Q1, a diode D1, an electrolytic capacitor E1, and a capacitor C2. One end of the inductor L1 is connected to the power supply voltage, and the other end of the inductor L1 is connected to the anode of the diode D1. The drain of the MOSFET Q1 is connected between the other end of the inductor L1 and the anode of the diode D1, the source of the MOSFET Q1 is grounded, the gate of the MOSFET Q1 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the main control module. One end of the resistor R2 is connected between one end of the resistor R1 and the gate of the MOSFET Q1, and the other end of the resistor R2 is grounded. The positive terminal of the electrolytic capacitor E1 is connected to the cathode of the diode D1, and the negative terminal of the electrolytic capacitor E1 is grounded. The capacitor C2 is connected in parallel with the electrolytic capacitor E1.

3. The spray rate control circuit for the atomizer as described in claim 2, characterized in that: The main control module uses a chip U1 with model number CMS8S6990N. The other end of the resistor R1 is connected to the P23 pin of the chip U1. The boost module achieves the boost function by adjusting the PWM output of the P23 pin of the chip U1.

4. The spray rate control circuit for the atomizer as described in claim 3, characterized in that: The PWM output frequency of the P23 pin of the chip U1 is 20kHz to 50kHz.

5. The spray rate control circuit for the atomizer as described in claim 1, characterized in that: The atomization driving module includes a three-pin inductor L2, resistors R3, R4, and R5, and a MOSFET Q2. Pin 1 of the three-pin inductor L2 is connected to the positive output terminal of the boost module; pin 2 of the three-pin inductor L2 is connected to the positive terminal of the atomizing plate; pin 3 of the three-pin inductor L2 is connected to the negative terminal of the atomizing plate; the drain of the MOSFET Q2 is connected between pin 2 of the three-pin inductor L2 and the positive terminal of the atomizing plate; the source of the MOSFET Q2 is grounded through resistor R5; the gate of the MOSFET Q2 is connected to one end of resistor R3; the other end of resistor R3 is connected to the main control module; one end of resistor R4 is connected between one end of resistor R3 and the gate of the MOSFET Q2; and the other end of resistor R4 is grounded.

6. The spray rate control circuit for the atomizer as described in claim 5, characterized in that: The main control module uses a chip U1 with model number CMS8S6990N. The other end of the resistor R3 is connected to the P22 pin of the chip U1. The atomization driving module generates a PWM square wave through the P22 pin of the chip U1, and combines it with the inductor L2 to generate the voltage waveform required to drive the atomizing plate, so as to realize the driving of the atomizing plate.

7. The spray rate control circuit for the atomizer as described in claim 5, characterized in that: The current sampling module includes a resistor R6 and a capacitor C3; one end of the resistor R6 is connected between the source of the MOS transistor Q2 and the resistor R5, and the other end of the resistor R6 is connected to the main control module; one end of the capacitor C3 is grounded, and the other end of the capacitor C3 is connected to the main control module.

8. The spray rate control circuit for the atomizer as described in claim 7, characterized in that: The main control module uses a chip U1 with model number CMS8S6990N. The other end of the resistor R6 is connected to the P21 pin of the chip U1. The current sampling module performs AD sampling through the P21 pin of the chip U1 to detect the magnitude of the current flowing through the atomizing sheet.

9. An atomizer, characterized in that: Includes the spray rate control circuit of the atomizer as described in any one of claims 1-8.

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