Atomization circuit module and atomization head

Abstract

The utility model provides an atomization circuit module. The atomization circuit module comprises a voltage stabilizing module and a single-chip microcomputer control module. The input end of the voltage stabilizing module is connected with a power supply, and the output end is connected with the single-chip microcomputer control module. The single-chip microcomputer control module outputs a PWM signal with a variable duty ratio so as to control the atomization sheet to oscillate at a resonant frequency. The utility model further provides an atomizing head which comprises the atomizing circuit module, an atomizing sheet and an atomizing head outer shell. The atomization circuit module is electrically connected with the atomization piece and the atomization head outer shell, and the atomization control circuit module and the atomization piece are both arranged in the atomization head outer shell.

Description

Technical Field

[0001] The utility model relates to humidifying equipment, in particular to atomizing humidifying equipment. Background Art

[0002] Ultrasonic atomization is a device that uses ultra-high frequency oscillation (oscillation frequency is 1.7MHz / 2.4MHz) to break up water droplets into ultra-fine particles of about five microns through high-frequency resonance with the atomizer. The water droplets are then diffused by a pneumatic device. The continuously generated suspended water mist eventually achieves the effect of moistening the air. Moreover, 1.7MHz / 2.4MHz cannot be heard by the human ear. In dry weather, it can effectively improve the indoor humidity environment and increase human comfort.

[0003] Currently, ultrasonic atomization technology is widely used in humidifiers, aromatherapy machines, and medical atomization devices. Traditional atomizer heads use analog component self-excited oscillation technology to generate ultrasonic vibrations through piezoelectric materials to achieve the atomization effect.

[0004] Traditional atomizer heads use analog component self-oscillation technology. This solution requires a large number of components, and when assembled together, the overall structure is relatively large, so the overall size of the atomizer head is also relatively large. In addition, the components are exposed to a humid environment, which makes them prone to corrosion and damage, causing product failure.

[0005] The oscillation signal is generated by self-excited oscillation, and the parameter settings of each component are relatively complex, resulting in a long debugging cycle. In addition, the driving frequency is not easy to adjust, and it is impossible to find the optimal resonant frequency through real-time adjustment of the driving frequency. During use, the parameters of the component will cause the frequency to shift, and if it exceeds a certain range, it will not be able to resonate and fail. Utility Model Content

[0006] The main technical problem to be solved by the present invention is to provide an atomization circuit module to overcome the shortcomings of the self-excited oscillation technology.

[0007] In order to solve the above technical problems, the present invention provides an atomization circuit module, including: a voltage stabilization module and a single-chip microcomputer control module; the input end of the voltage stabilization module is connected to a power supply, and the output end is connected to the single-chip microcomputer control module; the single-chip microcomputer control module outputs a PWM signal with a varying duty cycle to control the atomization plate to oscillate at a resonant frequency.

[0008] In a preferred embodiment: the voltage stabilizing module includes a voltage stabilizing chip IC1, and the single-chip microcomputer control module includes a single-chip microcomputer chip U1;

[0009] The input end of the voltage regulator chip is connected to the power supply, and the output end is connected to the VDD pin of the single-chip microcomputer chip U1. The input end of the voltage regulator chip and the ground are connected to filter capacitors C1 and C2, and a filter capacitor C3 is also connected between the output end of the voltage regulator chip and GND.

[0010] In a preferred embodiment, the PWM output terminal of the single-chip microcomputer chip U1 is connected to the control electrode of the switch tube Q1, and the switch tube Q1 is connected between the two ends of the atomizer Y1.

[0011] In a preferred embodiment, the switch Q1 is a MOS transistor, whose drain is connected to one end of the atomizer Y1 via capacitor C4, and whose source is connected to the other end of the atomizer Y1. A current-limiting resistor R2 is also connected in series between the source and one of the IO pins of the microcontroller chip U1. The two ends of the current-limiting resistor R2 are connected to GND via capacitors C5 and C6, respectively.

[0012] In a preferred embodiment, the capacitor C5 is connected in parallel with the resistor R1.

[0013] In a preferred embodiment, the drain of the MOS tube and the same-name end of the capacitor C4 are also connected to a power supply via an inductor L1.

[0014] In a preferred embodiment: the single chip microcomputer chip also has two IO ports connected to R3 and R4 respectively, for serial communication with an external control module.

[0015] The utility model also provides an atomizer head, comprising: the atomizer circuit module, the atomizer sheet, and the atomizer head outer shell as described above;

[0016] The atomization circuit module is electrically connected to the atomization piece and the atomization head outer shell, and the atomization control circuit module and the atomization piece are both arranged inside the atomization head outer shell.

[0017] In a preferred embodiment, the atomization circuit module is electrically connected to an external control module, the external control module is externally connected to a power supply, and one end of the power supply is electrically connected to the inside of the atomization head outer shell through the atomization control circuit module.

[0018] In a preferred embodiment: the outer shell of the atomizing head is a conductive shell;

[0019] The conductive shell is an insulating shell whose outer surface is wrapped with an electroplating layer, and the positive pole or the negative pole of the power supply is connected to the conductive shell.

[0020] Compared with the existing technology, the technical solution of the utility model has the following beneficial effects:

[0021] The utility model provides an atomization circuit module, which controls the atomization of the atomizer plate through the atomization circuit module, sets the initial duty cycle of the PWM signal output by the single-chip control module, and determines whether the atomizer plate reaches a resonance state through a detection circuit. During use, the duty cycle of the PWM signal is adjusted in real time to keep the atomizer plate at the optimal resonance frequency, thereby extending the product life and increasing product reliability and consistency.

[0022] The utility model provides an atomizer head with a small overall size. The shell is made of sealed conductive material. The power supply of the internal circuit of the atomizer head is in contact with the shell, which ensures that the shell has a good shielding effect and solves the EM I problem. The atomizer plate is fixed to the upper shell by a sealing ring. The shell also adopts a sealing structure, so that the atomizer head as a whole forms a sealed structure. Only the atomizer plate contacts water, and the power supply and control parts are isolated from water. This allows the product to be modularly assembled, has good safety performance, and improves its service life and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded view of the structure of the atomizing head in the preferred embodiment of the present utility model;

[0024] Figure 2 This is a circuit diagram of the atomization circuit module in the preferred embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the module connection of the atomizer head in the preferred embodiment of the present utility model;

[0026] Figure 4 This is the EM I test waveform diagram when the atomizer head shell is made of non-conductive material;

[0027] Figure 5 This is the EMI test waveform of the atomizer head housing in the preferred embodiment of the present utility model;

[0028] Figure 6 This is a cross-sectional view of an atomizing head in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all 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] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships depicted in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] refer to Figure 1 In this embodiment, an atomizer head is provided, comprising: an atomizer circuit module 3, an atomizer sheet 2 and an atomizer head outer shell 1; the atomizer circuit module 3 is electrically connected to the atomizer sheet 2 and the atomizer head outer shell 1, and the atomizer control circuit module and the atomizer sheet 2 are both arranged inside the atomizer head outer shell 1.

[0033] Among them, the atomization circuit module further includes: a voltage stabilization module and a single-chip microcomputer control module; the input end of the voltage stabilization module is connected to the power supply, and the output end is connected to the single-chip microcomputer control module; the single-chip microcomputer control module outputs a PWM signal with a changing duty cycle to control the atomization plate 2 to oscillate at a resonant frequency.

[0034] The above-mentioned atomization circuit module 3 controls the atomization of the atomization sheet 2 through the atomization circuit module 3, sets the initial duty cycle of the PWM signal output by the single-chip control module, and determines whether the atomization sheet 2 reaches the resonance state through the detection circuit. During use, the duty cycle of the PWM signal is adjusted in real time to ensure that the atomization sheet 2 is always at the optimal resonance frequency, thereby extending the product life and increasing product reliability and consistency.

[0035] In this embodiment, the outer shell 1 of the atomizer head is made of sealed conductive material, and the power supply of the internal circuit of the atomizer head is in contact with the outer shell 1 of the atomizer head, thereby ensuring that the outer shell 1 of the atomizer head has a good shielding effect and solving the EM I problem. The atomizer sheet 2 is fixed to the outer shell 1 of the atomizer head by a sealing ring. The outer shell 1 of the atomizer head also adopts a sealed structure, so that the atomizer head as a whole forms a sealed structure. Only the atomizer sheet 2 contacts water, and the power supply and control parts are isolated from water. This allows the product to be modularly assembled, has good safety performance, and improves its service life and efficiency.

[0036] Specifically, the voltage stabilizing module includes a voltage stabilizing chip IC1, and the single-chip microcomputer control module includes a single-chip microcomputer chip U1; the input end of the voltage stabilizing chip IC1 is connected to the power supply, and the output end is connected to the VDD pin of the single-chip microcomputer chip U1. The input end of the voltage stabilizing chip IC1 and the ground are connected to filter capacitors C1 and C2, and a filter capacitor C3 is also connected between the output end of the voltage stabilizing chip IC1 and GND.

[0037] The PWM output terminal of the microcontroller chip U1 is connected to the gate of the MOS transistor Q1. The drain of the MOS transistor Q1 is connected to one end of the atomizer 2Y1 via a capacitor C4, and the source is connected to the other end of the atomizer 2Y1. A current-limiting resistor R2 is also connected in series between the source of the MOS transistor Q1 and one of the IO port pins of the microcontroller chip U1. The two ends of the current-limiting resistor R2 are connected to GND via capacitors C5 and C6, respectively.

[0038] In addition, the capacitor C5 is connected in parallel with the resistor R1. The drain of the MOS transistor Q1 and the same-name end of the capacitor C4 are also connected to a power supply via an inductor L1.

[0039] In order to communicate with the external control module, the single chip microcomputer chip has two IO ports. In this embodiment, pins 2 and 3 are connected to R3 and R4 respectively for serial communication with the external control module.

[0040] During operation, voltage regulator IC1 provides power to microcontroller U2. Pin 2 of microcontroller U1 receives the power demand signal from the external control module. Pin 3 of microcontroller U1 transmits operating information. Pin 11 of microcontroller U1 provides the PWM signal required by atomizer 2Y1, controlling the on / off state of MOSFET Q1. This causes atomizer 2 to oscillate at high frequency, dispersing water into tiny particles, thus creating atomization. Inductor L1, capacitor C4, and MOSFET Q1 form a boost circuit, providing a resonant voltage to atomizer 2Y1. Resistor R1 is a sampling resistor for the operating current. The voltage collected by resistor R1 is filtered by capacitor C5, flows through current-limiting resistor R2, and then filtered by capacitor C6. It is then read by pin 4 of microcontroller U1. Microcontroller U1's software algorithm corrects the PWM signal at pin 5 of microcontroller U1, allowing atomizer 2 to operate at its optimal resonant frequency. During operation, when the MCU chip U1 detects through the software algorithm that there is no water on the surface of the atomizer 2Y1, the MCU chip U1 will turn off the PWM signal at pin 11 to stop the atomizer 2Y1 from working. At the same time, the MCU chip U1 sends a water shortage signal through pin 3.

[0041] In this embodiment, the software algorithm logic is that when the control chip of the atomizer receives the power-on command, it starts to start the frequency tracking of the atomizer plate 2. By using the range of the oscillation frequency of the atomizer plate 2, starting from a low frequency to a high frequency, the frequency tracking can be performed by detecting the voltage of the pin of the frequency tracking circuit feedback circuit, thereby realizing the frequency tracking process of the atomizer plate 2. The frequency tracking circuit can be one or more oscillators and other components for generating and adjusting the signal for driving the atomizer plate 2. When the atomizer is started, various parameters of the atomizer plate 2 during the frequency tracking process, such as current, voltage, etc., can be detected and obtained, recorded, and compared with the preset optimal parameter range. If the various parameters of the atomizer plate 2 during the frequency tracking process are within the preset optimal parameter range, it can be considered that the frequency tracking is successful. If the various parameters of the atomizer plate 2 during the frequency tracking process are not within the preset optimal parameter range, it can be considered that the frequency tracking has failed.

[0042] In this embodiment, the atomizer circuit module 3 is electrically connected to an external control module. The external control module is connected to an external power source, one end of which is electrically connected to the interior of the atomizer head outer shell 1 through the atomizer control circuit module. In addition to controlling the atomizer head, the external control module can also control the night light. Furthermore, the atomizer head outer shell 1 is a conductive shell; specifically, the conductive shell is an insulating shell with an electroplated outer surface. The positive or negative terminal of the power source is connected to the conductive shell.

[0043] Figure 4 To test the test waveform of the waterproof atomizer head outer shell 1 made of non-conductive material, Figure 5 This is the test waveform of the waterproof atomizer head in the embodiment of the present utility model. Figure 4 As shown, when the atomizer head outer shell 1 is made of non-conductive material, the waveforms of 1.7 MHz and 1.7 MHz multipliers have obvious spike interference from the tested waveforms. When the conductive embodiment of the utility model is used and the outer shell is electrically connected to the power supply end, the overall waveform is obviously smoother from the tested waveforms, which is better than the waterproof atomizer head made of non-conductive material, making the product performance better.

[0044] The above is only a preferred specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. An atomization circuit module, characterized in that include: A voltage stabilizing module and a single-chip microcomputer control module; the input end of the voltage stabilizing module is connected to a power supply, and the output end is connected to the single-chip microcomputer control module; the single-chip microcomputer control module outputs a PWM signal with a varying duty cycle to control the atomizer to oscillate at a resonant frequency; the voltage stabilizing module includes a voltage stabilizing chip IC1, and the single-chip microcomputer control module includes a single-chip microcomputer chip U1; The input end of the voltage stabilizing chip is connected to the power supply, and the output end is connected to the VDD pin of the single-chip microcomputer chip U1. The input end of the voltage stabilizing chip and the ground are connected to filter capacitors C1 and C2, and a filter capacitor C3 is also connected between the output end of the voltage stabilizing chip and GND; the PWM output end of the single-chip microcomputer chip U1 is connected to the control electrode of the switch tube Q1, and the switch tube Q1 is connected between the two ends of the atomizer Y1.

2. The atomization circuit module according to claim 1, characterized in that: The switch Q1 is a MOS transistor, with its drain connected to one end of the atomizer Y1 via capacitor C4, and its source connected to the other end of the atomizer Y1. A current-limiting resistor R2 is also connected in series between the source and one of the IO pins of the microcontroller chip U1. The two ends of the current-limiting resistor R2 are connected to GND via capacitors C5 and C6, respectively.

3. The atomization circuit module according to claim 2, characterized in that: The capacitor C5 is connected in parallel with the resistor R1.

4. The atomization circuit module according to claim 2, characterized in that: The drain of the MOS tube and the same-name end of the capacitor C4 are also connected to a power supply via an inductor L1.

5. The atomization circuit module according to claim 1, characterized in that: The single chip microcomputer chip also has two IO ports connected to R3 and R4 respectively, which are used for serial communication with an external control module.

6. An atomizing head, characterized in that include: The atomization circuit module, atomization sheet, and atomization head outer shell according to any one of claims 1 to 5; The atomizing circuit module is electrically connected to the atomizing sheet and the atomizing head outer shell. The atomizing circuit module and the atomizing sheet are both arranged inside the atomizing head outer shell.

7. The atomizing head according to claim 6, characterized in that: The atomization circuit module is electrically connected to the external control module. The external control module is externally connected to a power source, and one end of the power source is electrically connected to the inside of the atomization head outer shell through the atomization circuit module.

8. The atomizing head according to claim 7, characterized in that: The outer shell of the atomizing head is a conductive shell; The conductive shell is an insulating shell whose outer surface is wrapped with an electroplating layer, and the positive pole or the negative pole of the power supply is connected to the conductive shell.

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