CN206168666U - Ultrasonic atomizer - Google Patents

Abstract

The utility model discloses an ultrasonic atomizer, characterized in that it comprises: a shell composed of an upper shell and a lower shell, a control mainboard arranged in the shell, an atomizing sheet electrically connected to the control mainboard, and a fixing part; the upper shell is provided with an atomizing hole; the atomizing sheet is located at the lower end of the atomizing hole; the fixing part presses and fixes the atomizing sheet to the upper shell. The atomization control of the atomizing sheet of the utility model is controlled by the control mainboard, the initial frequency produced by the MCU is set, and the detection circuit is used to determine whether the ceramic atomizing sheet reaches a resonance state. During use, the PWM output frequency is adjusted from time to time to keep the atomizing sheet in a resonance state, which is referred to as frequency locking, which prolongs the product life and increases product reliability and consistency.

Description

An ultrasonic nebulizer

technical field

The utility model relates to a daily necessities, in particular to an atomizer.

Background technique

At present, ultrasonic atomization technology is widely used in humidifiers, aromatherapy machines, and medical atomization devices. The traditional atomization technology adopts the self-excitation technology of analog components, but when the analog components are assembled together, the overall structure is relatively large, so the overall size of the atomizer is also relatively large. Moreover, the essential characteristic of the atomizing sheet is equivalent to a capacitor, and its resonant frequency has been determined after the production is completed, and the resonant frequency will drift with the actual use process. The traditional control method, such as the resonant frequency of a certain ceramic atomizer is 1.77MHZ, uses an analog component inductance and capacitor in series to generate a frequency of 1.77MZH, and resonates with the atomizer. During use, the parameters of the inductance, capacitance and ceramic atomizer of the analog components will drift. If they exceed a certain range, resonance will not be possible, and the product will fail.

Utility model content

In order to overcome the disadvantages of the above-mentioned prior art, the purpose of this utility model is to provide an ultrasonic nebulizer.

The technical scheme of the utility model is: an ultrasonic atomizer, including: a shell composed of an upper shell and a lower shell, a control main board arranged in the shell, an atomizing sheet electrically connected to the control main board, and a fixing piece; The upper shell is provided with an atomizing hole; the atomizing sheet is located at the lower end of the atomizing hole; the fixing member compresses and fixes the atomizing sheet on the upper shell.

Its further technical solution is: the upper shell and the lower shell are provided with a clamping structure.

Its further technical solution is: the control main board is fixedly connected with the lower case.

Its further technical solution is: a sealing ring is further provided between the fixing member and the upper shell; the sealing ring is provided on the outer periphery of the atomizing sheet.

Its further technical solution is: the outer periphery of the housing is provided with a power cord lead-out hole, and a sealing structure for sealing the power cord and the housing.

Its further technical solution is: the control board is provided with a main control circuit, an atomizer drive circuit, a water shortage detection circuit, a fan control circuit, a power conversion circuit, and a switch control circuit electrically connected to the main control circuit.

Its further technical solution is: the control board is also provided with an LED light electrically connected to the main control circuit.

Compared with the prior art, the technical effect of the utility model is: an ultrasonic atomizer, the atomization control of the atomization sheet is controlled by the control board, the initial frequency of MCU production is set, and the ceramic fog is judged by the detection circuit Whether the atomization sheet reaches the resonance state, adjust the PWM output frequency from time to time during use, so that the atomization sheet is always in the resonance state, referred to as frequency locking, which prolongs the product life and increases product reliability and consistency. Moreover, the overall size is small, and the shell also adopts a sealed structure. The atomizer is locked on the upper shell through the fixing piece. At the same time, it is sealed by the sealing ring, so that the atomizer forms a sealed structure as a whole. Only the atomizer contacts water, and the power supply And the integrated control board is isolated from water, and the safety performance is very good.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Description of drawings

Fig. 1 is a perspective view of an ultrasonic nebulizer of the present invention.

FIG. 2 is an exploded view of the embodiment of FIG. 1 .

Figure 3 is a schematic diagram of the circuit connection of the atomizer.

Figure 4 is a circuit diagram of the main control circuit.

Fig. 5 is a circuit diagram of the driving circuit of the atomizing sheet.

Figure 6 is a circuit diagram of the water shortage detection circuit.

FIG. 7 is a circuit diagram of the fan control circuit.

FIG. 8 is a circuit diagram of a switch control circuit.

FIG. 9 is a circuit diagram of a power conversion circuit.

reference sign

10 Nebulizer 1 Housing

11 Upper shell 111 Atomizing hole

12 Lower case 2 Control board

3 Atomizing sheet 4 Fixing piece

41 sealing ring

detailed description

In order to fully understand the technical content of the utility model, the technical solution of the utility model is further introduced and explained below in combination with schematic diagrams, but is not limited thereto.

As shown in Figures 1 and 2, an ultrasonic nebulizer 10 includes: a housing 1 composed of an upper housing 11 and a lower housing 12, a control board 2 disposed in the housing 1, and electrically connected to the control board 2 The atomizing sheet 3, the fixing part 4, the upper shell 11 and the lower shell 12 are provided with a clamping structure.

The upper shell 11 is provided with an atomizing hole 111 , the atomizing sheet 3 is located at the lower end of the atomizing hole 111 , and the fixing member 4 compresses and fixes the atomizing sheet 3 on the upper shell 11 .

The control main board 2 is fixedly connected with the lower shell 12, and the control main board 2 is provided with a main control circuit, an atomizer drive circuit, a water shortage detection circuit, a fan control circuit, a power conversion circuit, a switch control circuit, and an LED electrically connected to the main control circuit lamp.

A sealing ring 41 is also provided between the fixing part 4 and the upper shell 11 , and the sealing ring 41 is arranged on the outer periphery of the atomizing sheet 3 .

The outer periphery of the housing 1 is provided with a power cord lead-out hole and a sealing structure for sealing the power cord and the housing 1 .

As shown in FIG. 3 , the driving circuit of the atomizing sheet, the water shortage detection circuit, the fan control circuit, the power conversion circuit, the switch control circuit, and the LED light are respectively electrically connected to the main control circuit. Refer to Figure 4-9 for specific circuit diagrams of the main control circuit, atomizer drive circuit, water shortage detection circuit, fan control circuit, power conversion circuit, and switch control circuit.

The main control circuit adopts LM358 chip, its PWM port is connected with the driving circuit of the atomizer, and the atomizer is controlled by the control signal to atomize, the WTS port of the water shortage detection circuit is connected with the main control circuit, and the dry reed switch is used to detect the water shortage state And control the conduction of the line. The FAN port of the fan control circuit receives a signal from the main control circuit, and controls the running state of the fan through the main control circuit. The KEY port of the switch control circuit is connected to the main control circuit, and the power supply of the main control circuit is controlled to be turned on and off by controlling the closed state of the switch, and the power input from the power line is converted into a 5V power supply through a power conversion circuit. power supply.

Use R18 to detect the working current of Q8 and TD2 atomizer, and use an algorithm to judge whether TD2 is in a resonance state. Considering the discrete type of the atomizer and the parameter drift caused by long working hours, U5 can detect it in time, and adjust the PWM output frequency in time through the MCU algorithm. At present, the output frequency of the MCU can be increased and decreased in steps of 1KHZ. For example, a 1.77MHZ atomizer can sweep the frequency from 1.5MHZ to 3MHZ in a wide range. After testing, it is judged that the resonance frequency of the atomizer is 1.775MHZ, and the MUC can output a frequency of 1.775MHZ, which is frequency locking.

U4 sends out a PWM frequency to drive Q8 on and off, and the generated pulse voltage causes the atomizing sheet TD1 to vibrate at high frequency to atomize the water.

The above only uses examples to further illustrate the technical content of the utility model, so that readers can understand it more easily, but it does not mean that the implementation of the utility model is limited to this, and any technical extension or re-creation done according to the utility model shall be Protected by the utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (7)

1. a kind of soniclizer, it is characterised in that include：The housing being made up of upper casing and lower casing, the control in housing Mainboard processed, the atomizing piece electrically connected with control mainboard, fixture；The upper casing is provided with orifice；The atomizing piece is located at atomization The lower end in hole；The fixture is fixed atomizing piece in upper casing.

2. soniclizer according to claim 1, it is characterised in that the upper casing is provided with interface arrangment with lower casing.

3. soniclizer according to claim 1, it is characterised in that the control mainboard is fixedly connected with lower casing.

4. soniclizer according to claim 1, it is characterised in that be additionally provided between the fixture and upper casing close Seal；The sealing ring is located at the periphery of atomizing piece.

5. soniclizer according to claim 1, it is characterised in that the periphery of the housing is provided with power line extraction Hole, and for sealing the sealing structure of power line and housing.

6. soniclizer according to claim 1, it is characterised in that the control mainboard is provided with governor circuit, point The atomization piece driving circuit that do not electrically connect with governor circuit, water shortage detection circuit, fan control circuitry, power-switching circuit, open Close control circuit.

7. soniclizer according to claim 6, it is characterised in that the control mainboard is additionally provided with and governor circuit The LED of electrical connection.