Electrolysis water control circuit and humidifier

Abstract

The application provides an electrolysis water control circuit and a humidifier. The electrolysis water control circuit comprises a control module, a driving module, a switching module, a signal conditioning module and an electrode module. The electrode module comprises at least an anode and a plurality of cathodes. The signal conditioning module is used for collecting an output voltage value of the driving module and processing the output voltage value to obtain a processed electrical signal. The control module is used for sending switching instructions to the switching module. The switching module is used for switching the plurality of cathodes in the electrode module according to the switching instructions. Different cathodes are used to determine corresponding electrolysis modes or detection modes, so as to realize electrolysis of water or water quality detection. Thus, water electrolysis can be performed through only a part of the cathodes at the same time, or another part of the cathodes works, and the water quality after electrolysis is detected, so that the water can be electrolyzed and water scale can be collected, and the water quality can be detected.

Description

Technical Field

[0001] This application relates to the field of water electrolysis technology, and more specifically, to a water electrolysis control circuit and a humidifier. Background Technology

[0002] As people's living standards improve, their requirements for environmental humidity are also higher. Appropriate humidity can help prevent or treat respiratory diseases and create a comfortable indoor environment. As a result, humidifiers have gradually entered people's lives. Currently, humidifiers are devices that use electricity to atomize water or produce water vapor, which is then sprayed into the room. The electrolytic cell in a humidifier includes a positive electrode and a cathode. During the electrolysis of water, scale will be covered on the cathode, affecting the water quality detection function and making it impossible to remind users to change the water. Therefore, how to conduct timely water quality testing while electrolyzing and collecting water is an urgent problem. Utility Model Content

[0003] The purpose of this application is to provide an electrolysis water control circuit to realize the function of detecting the quality of water after electrolysis.

[0004] In a first aspect, embodiments of this application provide an electrolysis water control circuit, which includes a control module, a drive module, a switching module, a signal conditioning module, and an electrode module. The electrode module includes at least an anode and multiple cathodes. The control module is connected to the drive module, the switching module, and the signal conditioning module, respectively. The output terminal of the drive module is connected to the output terminal of the switching module and the signal conditioning module, respectively. The switching module, the drive module, and the signal conditioning module are each connected to the electrode module. The signal conditioning module is used to acquire the output voltage value of the drive module and process the output voltage value to obtain a processed electrical signal. The control module is used to send switching commands to the switching module respectively; The switching module is used to switch multiple cathodes in the electrode module according to the switching command, and to use different cathodes to determine the corresponding electrolysis mode or detection mode, so as to realize water electrolysis or water quality detection.

[0005] In the above implementation process, the water electrolysis control circuit includes multiple cathodes and corresponding switching units. The control module controls the opening or closing of different switching units, thereby controlling the operation of the electrodes corresponding to the switching units. Thus, by switching between different cathodes, only a single operation can be performed at a certain time, such as only hydrolysis or only detection. In this way, after electrolysis and scale collection are performed through a portion of the cathodes, the water quality after electrolysis can be detected for a short time through another portion of the cathodes, thereby improving the accuracy and efficiency of water quality detection after electrolysis.

[0006] Optionally, the switching module includes a first switching unit and a second switching unit, wherein the first switching unit is connected to the first cathode in the electrode module, and the second switching unit is connected to the second cathode in the electrode module.

[0007] In some embodiments of this application, a switching module is provided, which includes a first switching unit and a second switching unit. The first switching unit and the second switching unit switch between different cathodes, so that not only can water be electrolyzed, but the quality of the electrolyzed water can also be detected.

[0008] Optionally, the first switching unit includes at least a fifth resistor, a sixth resistor, a second capacitor, and a first switching transistor. The first end of the fifth resistor is connected to the second input / output port of the control module. The second end of the fifth resistor is connected to the first end of the sixth resistor and the first end of the second capacitor, respectively. The second end of the sixth resistor and the second end of the second capacitor are connected to ground. The first end of the second capacitor is connected to the first end of the first switching transistor. The third end of the first switching transistor is connected to the first cathode.

[0009] Optionally, the second switching unit includes at least a seventh resistor, an eighth resistor, a third capacitor, and a second switching transistor. The first end of the seventh resistor is connected to the third input / output port of the control module. The second end of the seventh resistor is connected to the first end of the eighth resistor and the first end of the third capacitor, respectively. The second ends of the eighth resistor and the third capacitor are connected to ground. The first end of the third capacitor is connected to the first end of the second switching transistor, and the third end of the second switching transistor is connected to the second cathode.

[0010] In some embodiments of this application, resistors, capacitors, and switching tubes are provided in the first switching unit and the second switching unit, thereby controlling the electronic switch to achieve time-sharing operation of different cathodes. Optionally, the second end of the first switching tube and the second end of the second switching tube are connected to the drive module.

[0011] In some embodiments of this application, the second end of the first switching transistor and the second end of the second switching transistor are connected to the feedback pin of the drive module, so that the cathode signal can be obtained in a timely manner.

[0012] Optionally, the first switching transistor and the second switching transistor include at least one of a transistor, an IGBT, a relay, or a MOSFET.

[0013] Optionally, the MOS transistor is an NMOS transistor, and the triode is an NPN triode.

[0014] In some embodiments of this application, the switching transistor may include a transistor, IGBT, relay, or MOSFET, which can control the electronic switch and improve the accuracy of electronic switch control.

[0015] Optionally, the input pin of the drive module is connected to a DC power supply, the output pin of the drive module is connected to the anode, the control pin of the drive module is connected to the first input / output port of the control module, the feedback pin of the drive module is connected to the second end of the first switching transistor and the second end of the second switching transistor, and the feedback pin is connected to ground through a fourth resistor. In some embodiments of this application, the positive electrode is controlled by a drive module, and the anode voltage is obtained to calculate the water conductivity, thereby realizing the water quality detection function. Optionally, the signal conditioning module includes a first resistor, a first capacitor, a second resistor, a third resistor, and a first diode. The sampling port of the control module is connected to the first terminal of the first diode and the first terminal of the third resistor. The second terminals of the first diode and the third resistor are connected to ground. The first terminal of the third resistor is connected to the first terminal of the second resistor. The second terminal of the second resistor is connected to the first terminal of the first capacitor. The second terminal of the first capacitor is connected to ground. The second terminal of the first capacitor is connected to the anode through the first resistor.

[0016] Secondly, embodiments of this application provide a humidifier, which includes at least the water electrolysis control circuit of the first aspect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the structure of the water electrolysis control circuit provided in the embodiments of this application; Figure 2 A circuit block diagram of the water electrolysis control circuit provided in an embodiment of this application; Figure 3 A circuit diagram of the water electrolysis control circuit provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a water electrolysis control circuit provided in an embodiment of this application. The water electrolysis control circuit includes at least a control module 101, a drive module 102, a switching module 103, a signal conditioning module 105, and an electrode module 104. The electrode module 104 includes at least an anode and multiple cathodes. The control module 101 is connected to the drive module 102, the switching module 103, and the signal conditioning module 105. The output terminal of the drive module 102 is connected to the output terminal of the switching module 103 and the signal conditioning module 105. The switching module 103, the drive module 102, and the signal conditioning module 105 are all connected to the electrode module 104. The signal conditioning module 105 is used to acquire the output voltage value of the drive module 102 and process the output voltage value to obtain the processed electrical signal. Control module 101 is used to send switching commands to the switching modules respectively; The switching module 103 is used to switch multiple cathodes in the electrode module according to the switching command, and to use different cathodes to determine the corresponding electrolysis mode or detection mode, so as to realize water electrolysis or water quality detection.

[0022] The control module 101 can be a controller chip, such as a DSP (Digital Signal Processing) or MCU (Microcontroller Unit). The specific model is not specifically limited in this application. The control module 101 is connected to a section of the signal conditioning circuit through the ADC pin to collect the output voltage value of the drive module, and is also connected to the drive module through the input / output port.

[0023] The drive module is connected to the positive terminal in the electrode module, and its output terminal is connected to the output terminal of the switching module. The switching module includes switching units, and each switching unit is connected to the cathode in the electrode module. One switching unit can be connected to one cathode or multiple cathodes; or, one switching unit can be connected to one cathode. The switching module includes multiple switching units. In the embodiments of this application, the number of switching units and cathodes is not specifically limited.

[0024] In the above implementation process, the water electrolysis control circuit includes multiple cathodes and corresponding switching units. The control module controls the opening or closing of different switching units, thereby controlling the operation of the electrodes corresponding to the switching units. When one switching unit is open, water is electrolyzed through one cathode. Then, the switching unit stops, and the switching drive unit outputs a current value to open another switching unit. The electrolyzed water is then detected through another cathode. By providing a constant current, a circuit is formed between the anode, the water body, and the other cathode. By collecting the voltage value of the positive electrode, the water conductivity is calculated to detect the water quality. In this way, the control module controls the opening or closing of different switching units, thereby controlling the operation of the electrodes corresponding to the switching units. Through the mutual switching of different cathodes, only a single operation can be performed at a certain time, such as only hydrolysis or only detection. In this way, after electrolysis and scale collection are performed through some cathodes, the water quality after electrolysis is detected for a short time through the operation of other cathodes, thereby improving the accuracy and efficiency of water quality detection after electrolysis.

[0025] Optionally, the switching module includes a first switching unit and a second switching unit, wherein the first switching unit is connected to the first cathode in the electrode module, and the second switching unit is connected to the second cathode in the electrode module.

[0026] For example, such as Figure 2 As shown, the IO1 of the control module, i.e. the main controller, is connected to the drive module, and the output terminal of the drive module is connected to the anode. The main control IO2 is connected to the first switching unit K1, and the first switching unit K1 is connected to the first cathode, namely cathode 1. The main control IO3 is connected to the first switching unit K2, and the first switching unit K2 is connected to the second cathode, namely cathode 2.

[0027] In this embodiment, different operating currents are used to control different cathodes in a time-sharing manner. Specifically, when water electrolysis is in operation, cathode 1 is turned on and cathode 2 is turned off, and a set current Ia is used between the anode and cathode 1.

[0028] When testing water quality, disconnect cathode 1 and connect cathode 2. The set current Ib is used between the anode and cathode 1 for operation.

[0029] In some embodiments of this application, a switching module is provided, which includes a first switching unit and a second switching unit. The first switching unit and the second switching unit switch between different cathodes, so that not only can water be electrolyzed, but the quality of the electrolyzed water can also be detected.

[0030] Specific switching modules such as Figure 3 As shown: Optionally, the first switching unit includes at least a fifth resistor R5, a sixth resistor R6, a second capacitor C2, and a first switching transistor Q1. The first end of the fifth resistor R5 is connected to the second input / output port IO2 of the control module. The second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6 and the first end of the second capacitor C2. The second ends of the sixth resistor R6 and the second capacitor C2 are connected to ground. The first end of the second capacitor C2 is connected to the first end of the first switching transistor Q1. The third end of the first switching transistor Q1 is connected to the first cathode.

[0031] Optionally, the second switching unit includes at least a seventh resistor R7, an eighth resistor R8, a third capacitor C3, and a second switching transistor Q2. The first end of the seventh resistor R7 is connected to the third input / output port IO3 of the control module. The second end of the seventh resistor R7 is connected to the first end of the eighth resistor R8 and the first end of the third capacitor C3, respectively. The second ends of the eighth resistor R8 and the third capacitor C3 are connected to ground. The first end of the third capacitor C3 is connected to the first end of the second switching transistor Q2, and the third end of the second switching transistor Q2 is connected to the second cathode.

[0032] Specifically, in the cathode control circuit of this application embodiment: Q1 and Q2 are NMOS transistors, which function as switches.

[0033] R5, R6, and C2 form a voltage divider circuit for the gate control signal of Q1, which also allows Q1 to remain off by default.

[0034] R7, R8, and C3 form a voltage divider circuit for the gate control signal of Q2, which also allows Q2 to remain off by default.

[0035] In other words, when water electrolysis is working, Q1 is turned on, which connects cathode 1 and disconnects cathode 2. When testing the water quality, turn on Q2, which disconnects cathode 1 and connects cathode 2. In this way, Q1 and Q2 work in turn, which can not only remove scale, but also test the quality of the water after electrolysis. In some embodiments of this application, resistors, capacitors, and switching tubes are provided in the first switching unit and the second switching unit, thereby controlling the electronic switch to achieve time-sharing operation of different cathodes. Optionally, the second end of the first switching tube Q1 and the second end of the second switching tube Q2 are connected to the drive module.

[0036] In some embodiments of this application, the second end of the first switching transistor and the second end of the second switching transistor are connected to the feedback pin of the drive module, so that the cathode signal can be obtained in a timely manner.

[0037] Optionally, the first switching transistor and the second switching transistor include at least one of a transistor, an IGBT, a relay, or a MOSFET.

[0038] Optionally, the MOS transistor is an NMOS transistor (N-Metal-Oxide-Semiconductor, N-channel field-effect transistor), and the transistor is an NPN transistor; an NPN transistor is a transistor composed of two N-type semiconductors sandwiching a P-type semiconductor; it is also called a bipolar junction transistor.

[0039] In some embodiments of this application, the switching transistor may include a transistor, IGBT, relay, or MOSFET, which can control the electronic switch and improve the accuracy of electronic switch control.

[0040] Optionally, the input pin of the drive module is connected to a 24V DC power supply, the output pin of the drive module is connected to the anode, the control pin EN / DIM of the drive module is connected to the first input / output port IO1 of the control module, the feedback pin FB of the drive module is connected to the second end of the first switching transistor Q1 and the second end of the second switching transistor Q2, and the feedback pin FB is connected to ground through the fourth resistor R4. This application provides a constant current driving circuit, including: R4 is the current sampling resistor, and the maximum output current Imax = Vfb / R4.

[0041] Vfb is the feedback voltage of the constant current drive circuit.

[0042] In some embodiments of this application, the positive electrode is controlled by a drive module, and the anode voltage is obtained to calculate the water conductivity, thereby realizing the water quality detection function. Optionally, the signal conditioning module includes a first resistor R1, a first capacitor C1, a second resistor R2, a third resistor R3, and a first diode D1. The sampling port ADC of the control module is connected to the first terminal of the first diode D1 and the first terminal of the third resistor R3. The second terminal of the first diode D1 and the second terminal of the third resistor R3 are connected to ground. The first terminal of the third resistor R3 is connected to the first terminal of the second resistor R2. The second terminal of the second resistor R2 is connected to the first terminal of the first capacitor C1. The second terminal of the first capacitor C1 is connected to ground. The second terminal of the first capacitor C1 is connected to the anode through the first resistor R1.

[0043] This application provides a signal conditioning circuit, namely a signal conditioning module, which is connected to the control module. The signal conditioning circuit is used to transform the voltage on the anode into the input range of the main controller ADC through low-pass filtering and resistor voltage division.

[0044] The signal conditioning module includes: R1 and C1 are low-pass filters with a cutoff frequency of 1KHz; R1, R2, and R3 form a voltage divider circuit, and Vadc = Vout * R3 / (R1 + R2 + R3). Zener diode D1 ensures that the Vadc voltage is below 3.3V, thereby protecting the ADC of the main controller from damage by high voltage.

[0045] This application provides a main controller that uses IO2 and IO3 to control whether switches K1 and K2 are closed, thereby controlling the switching of cathode 1 and cathode 2. It also uses IO1 to send a PWM control signal to adjust the output current and control the operation and shutdown of the constant current drive circuit. An ADC collects the conditioned anode voltage. The ADC in the main controller samples the anode voltage, and the water conductivity is calculated from the sampled voltage.

[0046] The constant current drive provided in this application embodiment is a constant current drive circuit with low-end current detection. It sets the maximum output current through the current sampling resistor, can receive PWM signals from the main controller, and controls the duty cycle of the PWM signal to linearly change the output current between 0 and the maximum output current.

[0047] At the same time, it can receive control signals from the main controller and realize the closing and closing of the switch according to the different control signals. That is, the high and low of the IO2 signal can control the closing and closing of the switch K1; the high and low of the IO3 signal can control the closing and closing of the switch K2.

[0048] Specifically, during water electrolysis: IO3 outputs a low level, and K2 is in the off state; IO2 outputs a high level, and K1 is in the on state; IO1 controls the constant current drive circuit through the PWM (Pulse-Width Modulation) signal, so that the constant current drive outputs current Ia. At this time, the working current Ia forms a loop through the anode, water body, and cathode 1.

[0049] During water electrolysis, electrolytes in the water are also adsorbed near the cathode 1 and eventually adhere to it. Therefore, scale can also accumulate during water electrolysis.

[0050] During water quality testing: IO2 outputs a low level, and K1 is in the off state; IO3 outputs a high level, and K2 is in the on state. IO1 controls the constant current drive circuit through the PWM signal, causing the constant current drive to output current Ib. At this time, the operating current Ib forms a loop through the anode, water body, and cathode 2. The MCU collects the voltage value on the anode. During the operation of the water electrolysis control circuit, the two cathodes need to switch between each other. Electrolysis cannot be performed, and detection cannot be performed. In addition, electrolysis is performed most of the time, and detection is performed only for a very short time.

[0051] When the circuit stops working: IO2 outputs a low level, K1 is in the off state; IO3 outputs a low level, K2 is in the off state, IO1 outputs a low level; the constant current drive circuit does not output current.

[0052] In this embodiment, after the water electrolysis is started and carried out for a period of time, the electrolysis is stopped, and then water quality is tested for a few seconds before the test is stopped. In this way, the operation can be repeated continuously to electrolyze the water and perform the test.

[0053] This application provides a humidifier that includes at least the above-described electrolytic water control circuit, and an electrolytic cell is installed inside the humidifier, with an anode and multiple cathodes disposed in the electrolytic cell.

[0054] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0055] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0056] If a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0057] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0058] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A water electrolysis control circuit, characterized in that, The water electrolysis control circuit includes a control module, a drive module, a switching module, a signal conditioning module, and an electrode module. The electrode module includes at least an anode and multiple cathodes. The control module is connected to the drive module, the switching module, and the signal conditioning module respectively. The output terminal of the drive module is connected to the output terminal of the switching module and the signal conditioning module respectively. The switching module, the drive module, and the signal conditioning module are connected to the electrode module respectively. The signal conditioning module is used to acquire the output voltage value of the drive module and process the output voltage value to obtain a processed electrical signal. The control module is used to send switching commands to the switching module respectively; The switching module is used to switch multiple cathodes in the electrode module according to the switching command, and to use different cathodes to determine the corresponding electrolysis mode or detection mode, so as to realize water electrolysis or water quality detection.

2. The water electrolysis control circuit according to claim 1, characterized in that, The switching module includes a first switching unit and a second switching unit. The first switching unit is connected to the first cathode in the electrode module, and the second switching unit is connected to the second cathode in the electrode module.

3. The water electrolysis control circuit according to claim 2, characterized in that, The first switching unit includes at least a fifth resistor, a sixth resistor, a second capacitor, and a first switching transistor. The first end of the fifth resistor is connected to the second input / output port of the control module. The second end of the fifth resistor is connected to the first end of the sixth resistor and the first end of the second capacitor, respectively. The second end of the sixth resistor and the second end of the second capacitor are connected to ground. The first end of the second capacitor is connected to the first end of the first switching transistor. The third end of the first switching transistor is connected to the first cathode.

4. The water electrolysis control circuit according to claim 2, characterized in that, The second switching unit includes at least a seventh resistor, an eighth resistor, a third capacitor, and a second switching transistor. The first end of the seventh resistor is connected to the third input / output port of the control module. The second end of the seventh resistor is connected to the first end of the eighth resistor and the first end of the third capacitor, respectively. The second end of the eighth resistor and the second end of the third capacitor are connected to ground. The first end of the third capacitor is connected to the first end of the second switching transistor, and the third end of the second switching transistor is connected to the second cathode.

5. The water electrolysis control circuit according to any one of claims 3 or 4, characterized in that, The second end of the first switching transistor and the second end of the second switching transistor are connected to the drive module.

6. The water electrolysis control circuit according to claim 5, characterized in that, The first switching transistor and the second switching transistor include at least one of a transistor, an IGBT, a relay, or a MOSFET.

7. The water electrolysis control circuit according to claim 6, characterized in that, The MOS transistor is an NMOS transistor, and the triode is an NPN triode.

8. The water electrolysis control circuit according to claim 5, characterized in that, The input pin of the drive module is connected to a DC power supply, the output pin of the drive module is connected to the anode, the control pin of the drive module is connected to the first input / output port of the control module, the feedback pin of the drive module is connected to the second end of the first switching transistor and the second end of the second switching transistor, and the feedback pin is connected to ground through a fourth resistor.

9. The water electrolysis control circuit according to claim 1, characterized in that, The signal conditioning module includes a first resistor, a first capacitor, a second resistor, a third resistor, and a first diode. The sampling port of the control module is connected to the first terminal of the first diode and the first terminal of the third resistor. The second terminals of the first diode and the third resistor are respectively connected to ground. The first terminal of the third resistor is connected to the first terminal of the second resistor. The second terminal of the second resistor is connected to the first terminal of the first capacitor. The second terminal of the first capacitor is connected to ground. The second terminal of the first capacitor is connected to the anode through the first resistor.

10. A humidifier, characterized in that, It includes at least the water electrolysis control circuit as described in any one of claims 1-9.

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