Atomizer circuit and atomizer

Abstract

This invention discloses an atomizer circuit and an atomizer, relating to the field of atomizer technology. The atomizer circuit includes an atomizing plate oscillation circuit, a controller, a shield, and a heat sink. The atomizing plate oscillation circuit includes an atomizing plate and an oscillation drive circuit electrically connected to the atomizing plate. A first terminal of the atomizing plate oscillation circuit is connected to a power supply, and a second terminal is grounded. The atomizing plate oscillation circuit is electrically connected to the controller. The shield is electrically connected to the power supply. The heat sink is also electrically connected to the power supply. The shield and heat sink cover the atomizing plate oscillation circuit, placing the atomizing plate oscillation circuit within the projection range of the shield and heat sink. According to the atomizer circuit of this invention, by setting up a shield and heat sink, and covering the atomizing plate oscillation circuit with the shield and heat sink, a shielding capacitor is formed. This effectively absorbs the interference radiation signal generated by the atomizing plate oscillation circuit, thereby enabling the atomizer to pass EMC testing.

Description

Technical Field

[0001] This invention relates to the field of atomizer technology, and in particular to an atomizer circuit and an atomizer. Background Technology

[0002] Currently, commercially available atomizers / humidifiers emit significant radiation when their internal atomizing plates are in operation, which can easily cause electromagnetic interference to other electrical appliances, affecting their normal operation. Therefore, existing atomizers / humidifiers often fail to meet EMC (Electromagnetic Compatibility) testing requirements. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an atomizer circuit that can meet the requirements of EMC testing.

[0004] On one hand, the atomizer circuit according to an embodiment of the present invention includes:

[0005] An atomizing plate oscillation circuit includes an atomizing plate and an oscillation drive circuit electrically connected to the atomizing plate; a first terminal of the atomizing plate oscillation circuit is connected to a power supply, and a second terminal of the atomizing plate oscillation circuit is grounded.

[0006] The controller is electrically connected to the oscillation circuit of the atomizing plate;

[0007] The shielding cover is electrically connected to the power supply.

[0008] A heat sink is electrically connected to the power supply and is used to dissipate heat from the atomizing plate oscillation circuit.

[0009] The shield and the heat sink cover the atomizing plate oscillation circuit, so that the atomizing plate oscillation circuit is located within the projection range of the shield and the heat sink.

[0010] According to some embodiments of the present invention, the oscillation driving circuit includes:

[0011] The transistor, wherein the collector of the transistor is electrically connected to the power supply;

[0012] A first inductor, the first end of which is electrically connected to the emitter of the transistor;

[0013] The second inductor has its first end electrically connected to the second end of the first inductor, and its second end grounded.

[0014] A first capacitor, wherein a first terminal of the first capacitor is electrically connected to the base of the transistor, and a second terminal of the first capacitor is electrically connected to the power supply;

[0015] A first resistor, the first end of which is electrically connected to the base of the transistor;

[0016] The second capacitor has its first terminal electrically connected to the second terminal of the first resistor, its second terminal electrically connected to the first terminal of the atomizing plate, and its second terminal electrically connected to the power supply.

[0017] The third capacitor has its first terminal electrically connected to the second terminal of the first resistor, and its second terminal electrically connected to the connection point between the first inductor and the second inductor.

[0018] The third inductor has its first end electrically connected to the second end of the first resistor, and its second end electrically connected to the controller.

[0019] According to some embodiments of the present invention, the oscillation driving circuit further includes a junction between the controller and the oscillation driving circuit.

[0020] The second resistor, the first end of which is electrically connected to the second end of the third inductor;

[0021] The fourth capacitor has its first terminal electrically connected to the second terminal of the second resistor, and its second terminal grounded.

[0022] The third resistor, wherein the first end of the third resistor is electrically connected to the second end of the third inductor;

[0023] The fourth resistor has its first end electrically connected to the second end of the third resistor, and its second end is grounded.

[0024] The fifth capacitor has its first terminal electrically connected to the connection point between the third resistor and the fourth resistor, and its second terminal grounded.

[0025] The fifth resistor has its first end electrically connected to the first end of the fifth capacitor, and its second end electrically connected to the controller.

[0026] According to some embodiments of the present invention, the second inductor is a common-mode inductor.

[0027] According to some embodiments of the present invention, the transistor is of model number BU406.

[0028] According to some embodiments of the present invention, the atomizer circuit further includes a diode, the anode of which is electrically connected to the emitter of the transistor, and the cathode of which is electrically connected to the power supply.

[0029] According to some embodiments of the present invention, a filter unit is further provided between the atomizing plate oscillation circuit and the power supply.

[0030] According to some embodiments of the present invention, the filtering unit includes a filtering capacitor, which is connected in parallel with the power supply.

[0031] On the other hand, the atomizer according to an embodiment of the present invention includes the atomizer circuit described in the above-described embodiments.

[0032] The atomizer circuit and atomizer according to embodiments of the present invention have at least the following beneficial effects: by setting a shield and a heat sink, and making the shield and heat sink cover the atomizer oscillation circuit, and one end of the shield, heat sink and atomizer oscillation circuit are all connected to the power supply, forming an equipotential and forming an electric field effect with GND ground, thus forming a shielding capacitor, the interference radiation signal generated by the atomizer oscillation circuit can be effectively absorbed by the shielding capacitor, thereby enabling the atomizer to pass EMC testing.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0035] Figure 1 This is a circuit diagram of the atomizer circuit according to an embodiment of the present invention;

[0036] Figure 2 This is an equivalent schematic diagram of the atomizer circuit according to an embodiment of the present invention;

[0037] Figure label:

[0038] Atomizing plate oscillation circuit 100, shielding cover 200, heat sink 300. Detailed Implementation

[0039] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0040] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0041] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0042] like Figure 1 As shown, the atomizer circuit according to an embodiment of the present invention includes an atomizing plate oscillation circuit 100, a controller (not shown, but may be a microcontroller or other processor), a shielding cover 200, and a heat sink 300. The atomizing plate oscillation circuit 100 includes an atomizing plate DT1 and an oscillation drive circuit electrically connected to the atomizing plate DT1. The oscillation drive circuit drives the atomizing plate DT1 to vibrate according to a signal from the controller. A first terminal of the atomizing plate oscillation circuit 100 is connected to a power supply VDD, and a second terminal is grounded. The atomizing plate oscillation circuit 100 is also electrically connected to the controller via a connector CN1. The shielding cover 200 is electrically connected to the power supply VDD. The heat sink 300 is electrically connected to the power supply VDD and is used to dissipate heat from the atomizing plate oscillation circuit 100. The shielding cover 200 and the heat sink 300 cover the atomizing plate oscillation circuit 100, so that the atomizing plate oscillation circuit 100 is located within the projection range of the shielding cover 200 and the heat sink 300.

[0043] Specifically, please refer to Figure 2 , Figure 1 The atomizing plate oscillation circuit 100 shown can be equivalent to: Figure 2 The circuit consists of the equivalent inductance L, equivalent capacitance C, and atomizing plate DT1; and since the shielding cover 200 and the heat sink 300 cover the atomizing plate oscillation circuit 100, and both the shielding cover 200 and the heat sink 300 are electrically connected to the power supply VDD, the shielding cover 200 and the heat sink 300 can be equivalent to... Figure 2 The shielding capacitor CP shown in the figure has one plate (CP). 上 The circuit connected to GND forms the other plate of the shielding capacitor CP (CP). 下Since the atomizing plate oscillation circuit 100 is located between the shielding capacitors CP, the energy leaked during oscillation can be absorbed by the shielding capacitors CP, minimizing the interference signal generated by the circuit. Therefore, according to the atomizer circuit of the present invention, by setting up the shielding cover 200 and the heat sink 300, and placing the atomizing plate oscillation circuit 100 within the projection range of the shielding cover 200 and the heat sink 300, and with one end of the shielding cover 200, the heat sink 300, and the atomizing plate oscillation circuit 100 all connected to the power supply VDD, forming an equipotential and an electric field effect with GND, the interference radiation signal can be effectively absorbed by the shielding capacitors CP, thus enabling the atomizer to pass EMC testing. Simultaneously, the heat sink 300 can dissipate heat from the atomizing plate oscillation circuit 100, preventing excessive temperature from affecting the normal operation of the circuit.

[0044] Furthermore, such as Figure 1 As shown, in some embodiments of the present invention, the oscillation driving circuit includes a transistor Q1, a first inductor L1, a second inductor L2, a first capacitor C1, a first resistor R1, a second capacitor C2, a third capacitor C3, and a third inductor L3; the collector of transistor Q1 is electrically connected to the power supply VDD, the emitter of transistor Q1 is electrically connected to the first terminal of the first inductor L1, the second terminal of the first inductor L1 is electrically connected to the first terminal of the second inductor L2, the second terminal of the second inductor L2 is grounded, the base of transistor Q1 is electrically connected to the first terminal of the first capacitor C1, and the second terminal of the first capacitor C1 is electrically connected to the power supply VDD; The first end of the first resistor R1 is electrically connected to the base of the transistor Q1. The second end of the first resistor R1 is electrically connected to the first end of the second capacitor C2. The second end of the second capacitor C2 is electrically connected to the first end of the atomizing plate DT1. The second end of the atomizing plate DT1 is electrically connected to the power supply VDD. The first end of the third capacitor C3 is electrically connected to the second end of the first resistor R1. The second end of the third capacitor C3 is electrically connected to the connection point between the first inductor L1 and the second inductor L2. The first end of the third inductor L3 is electrically connected to the second end of the first resistor R1. The second end of the third inductor L3 is electrically connected to the controller through connector CN1.

[0045] The circuit consists of a transistor Q1, a first capacitor C1, and a first inductor L1 forming a three-point oscillation circuit. Since the atomizing element DT1 (transducer) can be considered a crystal oscillator with its own natural frequency, it is connected between the base of transistor Q1 and the power supply VDD via a second capacitor C2. When the atomizing element DT1 is excited by the oscillation circuit, it oscillates. This oscillation signal is then fed back to the base of transistor Q1 through the second capacitor C2, causing the oscillation circuit to resonate at the natural frequency of the atomizing element DT1. The peak-to-peak oscillation amplitude is approximately 50V-80V; the higher the voltage, the greater the atomization (within the voltage rating of the atomizing element DT1 itself). The controller adjusts the duty cycle of the PWM signal to change the base current of transistor Q1, thereby changing the voltage across the atomizing element DT1, and consequently, altering its power and atomization volume.

[0046] like Figure 1 As shown, in some embodiments of the present invention, the transistor Q1 can be a BU406, which is an NPN type silicon high-power transistor.

[0047] like Figure 1 As shown, in some embodiments of the present invention, the second inductor L2 is a common-mode inductor. The common-mode inductor can filter common-mode electromagnetic interference signals and play the role of EMI (Electromagnetic Interference) filtering, which can suppress the outward radiation of electromagnetic waves generated in the circuit.

[0048] like Figure 1 As shown, in some embodiments of the present invention, the oscillation drive circuit and the controller further include a second resistor R2, a fourth capacitor C4, a third resistor R3, a fourth resistor R4, a fifth capacitor C5, and a fifth resistor R5; the first end of the second resistor R2 is electrically connected to the second end of the third inductor L3, the second end of the second resistor R2 is electrically connected to the first end of the fourth capacitor C4, and the second end of the fourth capacitor C4 is grounded; the first end of the third resistor R3 is electrically connected to the second end of the third inductor L3, the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is grounded; the first end of the fifth capacitor C5 is electrically connected to the connection point between the third resistor R3 and the fourth resistor R4, and the second end of the fifth capacitor C5 is grounded; the first end of the fifth resistor R5 is electrically connected to the first end of the fifth capacitor C5, and the second end of the fifth resistor R5 is electrically connected to the controller through connector CN1.

[0049] like Figure 1 As shown, in some embodiments of the present invention, the atomizer circuit further includes a diode D1, the anode of which is electrically connected to the emitter of the transistor Q1, and the cathode of which is electrically connected to the power supply VDD.

[0050] In some embodiments of the present invention, a filtering unit is further provided between the atomizing plate oscillation circuit 100 and the power supply VDD. The filtering unit is used to filter the power supply VDD and remove interference signals. Figure 1 As shown, the filter unit includes a filter capacitor C6, which is connected in parallel across the positive and negative terminals of the power supply.

[0051] On the other hand, the present invention also proposes an atomizer that includes the atomizer circuit described in the above-mentioned embodiments.

[0052] According to the atomizer of the present invention, by employing the above-described atomizer circuit, by setting a shield 200 and a heat sink 300, and placing the atomizing plate oscillation circuit 100 within the projection range of the shield 200 and the heat sink 300, and by connecting one end of the shield 200, the heat sink 300 and one end of the atomizing plate oscillation circuit 100 to the power supply VDD to form an equipotential, and forming an electric field effect with GND, the interference radiation signal can be well absorbed by the shielding capacitor CP, thereby enabling the atomizer to pass EMC testing.

[0053] In the description of this specification, references to terms such as "one embodiment," "further embodiment," "some specific embodiments," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An atomizer circuit, characterized in that, include: An atomizing plate oscillation circuit includes an atomizing plate and an oscillation drive circuit electrically connected to the atomizing plate; a first terminal of the atomizing plate oscillation circuit is connected to a power supply, and a second terminal of the atomizing plate oscillation circuit is grounded. The controller is electrically connected to the oscillation circuit of the atomizing plate; The shielding cover is electrically connected to the power supply. A heat sink is electrically connected to the power supply and is used to dissipate heat from the atomizing plate oscillation circuit. The shield and the heat sink cover the atomizing plate oscillation circuit, so that the atomizing plate oscillation circuit is located within the projection range of the shield and the heat sink; The oscillation driving circuit includes: The transistor, wherein the collector of the transistor is electrically connected to the power supply; A first inductor, the first end of which is electrically connected to the emitter of the transistor; The second inductor has its first end electrically connected to the second end of the first inductor, and its second end grounded. A first capacitor, wherein a first terminal of the first capacitor is electrically connected to the base of the transistor, and a second terminal of the first capacitor is electrically connected to the power supply; A first resistor, the first end of which is electrically connected to the base of the transistor; The second capacitor has its first terminal electrically connected to the second terminal of the first resistor, its second terminal electrically connected to the first terminal of the atomizing plate, and its second terminal electrically connected to the power supply. The third capacitor has its first terminal electrically connected to the second terminal of the first resistor, and its second terminal electrically connected to the connection point between the first inductor and the second inductor. The third inductor has its first end electrically connected to the second end of the first resistor, and its second end electrically connected to the controller. The oscillation driving circuit and the controller also include: The second resistor, the first end of which is electrically connected to the second end of the third inductor; The fourth capacitor has its first terminal electrically connected to the second terminal of the second resistor, and its second terminal grounded. The third resistor, wherein the first end of the third resistor is electrically connected to the second end of the third inductor; The fourth resistor has its first end electrically connected to the second end of the third resistor, and its second end is grounded. The fifth capacitor has its first terminal electrically connected to the connection point between the third resistor and the fourth resistor, and its second terminal grounded. The fifth resistor has its first end electrically connected to the first end of the fifth capacitor, and its second end electrically connected to the controller. A filter unit is also provided between the atomizing plate oscillation circuit and the power supply.

2. The atomizer circuit according to claim 1, characterized in that, The second inductor is a common-mode inductor.

3. The atomizer circuit according to claim 1, characterized in that, The transistor is model BU406.

4. The atomizer circuit according to claim 1, characterized in that, The atomizer circuit also includes a diode, the anode of which is electrically connected to the emitter of the transistor, and the cathode of which is electrically connected to the power supply.

5. The atomizer circuit according to claim 1, characterized in that, The filtering unit includes a filtering capacitor, which is connected in parallel with the power supply.

6. An atomizer, characterized in that, Includes the atomizer circuit as described in any one of claims 1-5.

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