Water electrolysis device and skin cleaning device comprising same

Abstract

Disclosed is a water electrolysis device which can be suitably used in a skin cleaning device for cleaning the skin by supplying water containing microbubbles to the skin. The electrolysis device is provided with: a pair of electrodes (44, 46) which are provided facing each other and which electrolyze water by applying a voltage to the water, thereby generating microbubbles inside the water; a power supply unit (100) that outputs a voltage applied to the electrodes (44, 46); a power supply control unit (200) that applies the voltage output by the power supply unit (100) to the electrodes (44, 46) or cuts off the voltage in accordance with a drive signal from a system control unit (500); a current measurement unit (300) that detects the amount of current supplied to the electrodes (44, 46) by the power supply control unit (200) and flowing through the electrodes (44, 46); an electrode polarity conversion unit (400) that converts the polarity of the voltage applied to the electrodes (44, 46) by the power supply control unit (200) on the basis of a polarity conversion signal from the system control unit (500); and a system control unit (500) that controls the power supply control unit (200) on the basis of the amount of current detected by the current measurement unit (300), and that controls the operation of the electrode polarity conversion unit (400).

Description

TECHNICAL FIELD

[0001] The present application relates to an electrolysis device of water, and more particularly, to an electrolysis device of water that can be suitably used in a skin cleansing device that cleans the skin by supplying water containing microbubbles to the skin. BACKGROUND

[0002] To clean the skin, people use various physical, electrical, and chemical methods. There are methods of using a body cleansing device having a brush head with rotation or vibration as a physical device for skin cleansing, uniformly applying a cleansing product to the skin, or cleaning the skin. For example, Korean Patent No. 10-2324257 discloses a body cleansing device that supplies ultrasonic vibrations to a user by vibrating a brush head unit using a vibration motor or vibrating an ultrasonic head using an ultrasonic vibrator. On the other hand, a skin cleansing device that generates microbubbles composed of oxygen, hydrogen, and the like inside water by electrolyzing the water and cleans the skin by supplying the water containing the microbubbles to the skin is also under development (see Korean Patent Application No. 10-2023-0047442).

[0003] Although a skin care method using ionized water, bubbles, and the like generated by electrolyzing water is generally well known to the public, miniaturization of an electrolysis device is not easy, and it is known that electrolysis performance of a small electrolysis device is low and has poor practicality.

[0004] On the other hand, in the process of electrolyzing a liquid such as water, if a voltage is applied to an electrode for a long time, a substance in contact with the electrode is ionized, and a metal substance can be dissolved to generate scale. Such a phenomenon becomes more serious as the hardness of water increases. Scale formed by the dissolution of the metal substance is fixed to the electrode, causing a decrease in electrolysis performance of the electrode. For an electrolysis device used in a home-use cosmetic instrument, since the size thereof is small, the electrolysis performance is low, and due to the above phenomenon, the electrolysis performance can further decrease, making it difficult to maintain a cosmetic effect brought by electrolysis for a long time.

[0005] In addition, in a small electrolysis device used in a home-use skin cleansing device, since electrodes face each other at a narrow interval, the temperature of a liquid between the electrodes can increase in a short time, and since the time from completion of electrolysis to a time point of application to the skin is also very short, problems such as overloading of the electrodes of the skin cleansing device, overcurrent, overtemperature, and the like should be strictly controlled.

[0006] Therefore, there is an increasing need for an electrolysis device of water that is high in electrolysis efficiency, safe, and excellent in durability and stability, and a skin cleansing device using the same.

[0007] [Related Art Document]

[0008] (Patent Document 1) Korean Patent No. 10-2324257

[0009] (Patent Document 2) Korean Patent Application No. 10-2023-0047442 SUMMARY

[0010] TECHNICAL PROBLEM

[0011] An object of the present application is to provide an electrolysis device for water, which is excellent in electrolysis efficiency, durability, and safety, and can be manufactured in a small size, and a skin cleaning device including the same.

[0012] Another object of the present application is to provide an electrolysis device for water, which can be appropriately used in a small-sized home-use cosmetic instrument such as a skin cleaning device, and a skin cleaning device including the same.

[0013] TECHNICAL SOLUTION

[0014] To achieve the above object, the present application provides an electrolysis device for water, including: a pair of electrodes 44, 46, which are disposed to face each other, and generate microbubbles inside water by electrolyzing the water by applying a voltage to the water; a power supply unit 100, which outputs a voltage to be applied to the electrodes 44, 46; a power supply control unit 200, which applies or cuts off the voltage output from the power supply unit 100 to the electrodes 44, 46 according to a driving signal of a system control unit 500; a current measurement unit 300, which detects an amount of current flowing through the electrodes 44, 46 supplied from the power supply control unit 200 to the electrodes 44, 46; an electrode polarity conversion unit 400, which converts a polarity of the voltage applied to the electrodes 44, 46 by the power supply control unit 200 according to a polarity conversion signal of the system control unit 500; and the system control unit 500, which controls the power supply control unit 200 according to the amount of current detected by the current measurement unit 300, and controls an operation of the electrode polarity conversion unit 400.

[0015] The present application also provides a skin cleaning device including: a water tank 20 coupled to one end of a housing 10 and containing water; a pump 30 which draws the water contained in the water tank 20 and delivers the drawn water at a predetermined pressure in a manner that the drawn water is sprayed to the skin of a user through an electrolysis chamber 40; the electrolysis chamber 40 including a pair of electrodes 44, 46 disposed to face each other and electrolyzing the water supplied from the pump 30 to generate water containing microbubbles; and an electrolysis circuit board 80 which supplies current to the first and second electrodes 44, 46 to electrolyze the water passing through the first and second electrodes 44, 46, the electrolysis circuit board 80 including: a power supply section 100 which outputs a voltage applied to the electrodes 44, 46; a power supply control section 200 which applies or cuts off the voltage output from the power supply section 100 to the electrodes 44, 46 according to a drive signal of a system control section 500; a current measurement section 300 which detects an amount of current flowing through the electrodes 44, 46 supplied to the electrodes 44, 46 through the power supply control section 200; an electrode polarity conversion section 400 which converts a polarity of the voltage applied to the electrodes 44, 46 through the power supply control section 200 according to a polarity conversion signal of the system control section 500; and the system control section 500 which controls the power supply control section 200 and controls an operation of the electrode polarity conversion section 400 according to the amount of current detected by the current measurement section 300.

[0016] Effects of the Invention

[0017] According to the electrolysis device of the present application, the electrolysis efficiency of water is high, and durability and stability are excellent, and miniaturization can be achieved, so it can be appropriately used in a small household cosmetic instrument such as a skin cleaning device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a block diagram showing the structure of an electrolysis device of water according to an embodiment of the present application.

[0019] Figure 2 is a diagram showing an example of an electronic circuit structure of a current measurement section and an electrode polarity conversion section used in the electrolysis device of water according to the present application.

[0020] Figure 3 is a diagram showing a more specific electronic circuit structure of a current measurement section and an electrode polarity conversion section used in the electrolysis device of water according to an embodiment of the present application.

[0021] Figure 4 is a diagram showing a more specific electronic circuit structure of a power supply section and a power supply control section used in the electrolysis device of water according to an embodiment of the present application.

[0022] Figure 5is a perspective view (A) and a lengthwise sectional view (B) of a skin cleaning device having a compact electrolysis device of the present application.

[0023] Figure 6 and Figure 7 is a sectional view and an internal perspective view showing the structure of an electrolysis chamber usable in a skin cleaning device of an embodiment of the present application.

[0024] Figure 8 is a view showing another example of an electrolysis chamber applicable to a compact electrolysis device of the present application. DETAILED DESCRIPTION

[0025] The present application will be described in detail below with reference to the accompanying drawings. In the drawings, the illustration of some of the constituent elements can be larger or smaller than the actual size for the sake of explanation. Further, in the explanation of the present application, specific explanation will be omitted for the well-known general functions or configurations.

[0026] Figure 1 is a structure block diagram showing the structure of a water electrolysis device of an embodiment of the present application. As shown in Figure 1 the water electrolysis device of the present application includes a pair of electrodes 44, 46, a power supply section 100, a power supply feeding control section 200, a current measuring section 300, an electrode polarity conversion section 400, and a system control section 500.

[0027] The pair of electrodes 44, 46 are disposed facing each other, and water is electrolyzed by applying a voltage to the water, thereby generating microbubbles inside the water.

[0028] The power supply section 100 outputs a voltage to be applied to the electrodes 44, 46.

[0029] The power supply feeding control section 200 applies or cuts off (on / off) the voltage outputted from the power supply section 100 to the electrodes 44, 46 in accordance with a drive signal from the system control section 500.

[0030] The current measuring section 300 detects the amount of current flowing through the electrodes 44, 46 fed by the power supply feeding control section 200 to the electrodes 44, 46, and transmits it to the system control section 500 after amplifying it as necessary.

[0031] The electrode polarity conversion section 400 converts the polarity of the voltage applied to the electrodes 44, 46 by the power supply feeding control section 200 in accordance with a polarity conversion signal from the system control section 500.

[0032] The system control unit 500 controls the power supply control unit 200 and the operation of the electrode polarity switching unit 400 based on the current detected by the current measuring unit 300. Specifically, the system control unit 500 determines the amount of water between electrodes 44 and 46 based on the current detected by the current measuring unit 300, for example, whether there is sufficient water between electrodes 44 and 46. At this time, when the water flow between electrodes 44 and 46 is abnormal (too little or no water), the system control unit 500 cuts off the drive signal to the power supply control unit 200 to cut off the voltage applied to electrodes 44 and 46. Conversely, when the water flow between electrodes 44 and 46 is normal, the system control unit 500 outputs a drive signal to the power supply control unit 200 to apply voltage to electrodes 44 and 46 (normal operation). That is, when abnormal current flow is detected between electrodes 44 and 46, the system control unit 500 cuts off the voltage applied to electrodes 44 and 46 to suppress overheating and overcurrent of electrodes 44 and 46, thereby providing stability to the electrolysis device. Furthermore, the system control unit 500 periodically outputs a polarity switching signal (e.g., High / Low) to the electrode polarity switching unit 400 to periodically switch the polarity of the voltage applied to electrodes 44 and 46, thereby extending the lifespan of electrodes 44 and 46.

[0033] Figure 2 This is a diagram illustrating an example of the electronic circuit structure of the current measuring unit 300 and the electrode polarity conversion unit 400 used in the water electrolysis apparatus of the present invention.

[0034] like Figure 2 As shown, the electrode polarity conversion unit 400 includes a polarity conversion switch 410, which is used to switch the polarity of the voltage VELD_IN applied to electrodes 44 and 46, i.e., the application direction. The polarity conversion switch 410 switches the polarity of the voltage VELD_IN applied to electrodes 44 and 46 according to the polarity conversion signal ELD_SWITCH (high / low) output by the system control unit 500. By periodically changing the polarity conversion signal ELD_SWITCH (high ↔ low), the polarity of the voltage VELD_IN applied to electrodes 44 and 46 is periodically switched, thereby improving the durability, safety, and efficiency of the electrolysis electrodes 44 and 46.

[0035] In addition, such as Figure 2As shown, the current measuring unit 300 includes a current sensor 310, which is connected to the polarity switching switch 410 and is used to detect the amount of current flowing through electrodes 44 and 46. If necessary, it may also include an amplifier 320, which is used to amplify the output value (current signal) of the current sensor 310.

[0036] The system control unit 500 may be a typical microcontroller unit (MCU), which controls the power supply control unit 200 and the electrode polarity conversion unit 400 based on the output signal of the current measurement unit 300, user operations, and pre-set programs. The system control unit 500 may include: an analog-to-digital converter 502 (ADC) for converting analog signals input from the current measurement unit 300 into digital signals; and an input / output port 504 (IO) for outputting a polarity conversion signal ELD_SWITCH (high / low) to the electrode polarity conversion unit 400.

[0037] Figure 3 This is a diagram showing a more specific electronic circuit structure of the current measuring unit 300 and the electrode polarity switching unit 400 used in a water electrolysis apparatus according to an embodiment of the present invention.

[0038] like Figure 3 As shown, the current measurement unit 300 used in the water electrolysis apparatus of the present invention may include, for example, a current sensor 310 that uses a shunt resistor to detect changes in the voltage VELD_IN applied to the electrode polarity switching unit 400 and generates a current signal corresponding to the amount of current flowing in the electrodes 44 and 46; an amplifier 320 that amplifies the current signal generated by the current sensor 310 to generate an amplified current signal; and a low-pass filter 330 that removes noise from the amplified current signal and outputs a current signal I_SENSE corresponding to the amount of current flowing in the electrodes 44 and 46.

[0039] Furthermore, the electrode polarity switching unit 400 used in the water electrolysis device of the present invention may include: a relay switch 410 that receives voltage VELD_IN from the power supply control unit 200 and outputs it to electrodes 44 and 46, and is capable of switching the polarity of the voltage VELD_IN output to electrodes 44 and 46; and a polarity switching switch 420 that controls the relay switch 410 to switch the polarity of the voltage VELD_IN output to electrodes 44 and 46 according to the polarity switching signal ELD_SWITCH (high / low) input from the system control unit 500.

[0040] Figure 4is a diagram showing a more specific electronic circuit structure of a power supply section 100 and a power supply feeding control section 200 used in a water electrolysis device of an embodiment of the present application.

[0041] As shown in Figure 4 , the power supply section 100 used in the water electrolysis device of the present application can include a direct current voltage smoothing and stabilizing section 110 that smoothes and stabilizes a direct current (DC) voltage VELD output from a general battery, such as a rechargeable battery (not shown), and a step-up voltage regulator 120 that steps up the direct current voltage stabilized by the direct current voltage smoothing and stabilizing section 110 to a voltage required for electrolysis.

[0042] Further, as shown in Figure 4 , the power supply feeding control section 200 can include a power supply feeding switch 210, specifically a power supply feeding transistor 210, that applies or cuts off the voltage output from the power supply section 100 to the electrodes 44, 46 through the current measuring section 300 and the electrode polarity conversion section 400, and a power supply feeding switch control switch 220 for turning on / off the power supply feeding switch 210 according to a drive signal ELD_PWR_EN of the system control section 500.

[0043] In the water electrolysis device of the present application, by periodically converting the polarity of the voltage applied to the electrodes 44, 46 that electrolyze water, it is possible to prevent scale from being fixed to the electrodes 44, 46 and to prevent the gas bubbles generated by electrolysis of water from being concentrated between the electrodes 44, 46 that are miniaturized and arranged adjacent to each other, and further to improve the efficiency of electrolysis.

[0044] Further, the current flowing between the electrodes 44, 46 that electrolyze water can be measured by the current measuring section 300 to detect the amount of liquid (water) present between the electrodes 44, 46. That is, if the current value measured by the current measuring section 300 is less than a predetermined range, it can be considered that the electrolysis of water is excessively performed, resulting in a state where micro-bubbles of hydrogen gas, oxygen gas, or the like are excessively generated or the generated micro-bubbles cannot be smoothly discharged, and thus the voltage applied to the electrodes 44, 46 can be cut off to prevent overcurrent, or the polarity of the voltage applied to the electrodes 44, 46 can be converted, for example, at a faster cycle so that the micro-bubbles formed between the electrodes 44, 46 can be more easily discharged.

[0045] On the contrary, if the current value measured by the current measuring section 300 is greater than the predetermined range, it can be considered that electrolysis of water is insufficient, and thus the voltage applied to the electrodes 44, 46 can be continuously applied or the polarity of the voltage applied to the electrodes 44, 46 can be switched, for example, at a slower cycle, to promote electrolysis of water. Thus, according to the present application, the amount of liquid flowing between the electrodes 44, 46 of the electrolysis device can be sensed to adjust the voltage applied to the electrodes 44, 46.

[0046] When a small electrolysis device is built in a small household cosmetic instrument such as a skin cleaning device to generate bubbles (which can be micro-bubbles or nano-bubbles), the small volume of the electrolysis chamber or electrolysis tube can limit the amount of bubbles that can be generated. If the bubbles generated at this time are fully used, by controlling the power supply control section 200, even if electrolysis is not continuously performed but is performed at a predetermined cycle, the loss of the generated bubbles can be prevented, thereby improving the durability of the electrodes 44, 46 so that the electrolysis device can be used for a long period of time.

[0047] Hereinafter, an example of a skin cleaning device having a small electrolysis device according to the present application will be described. The smaller the size of the electrolysis device, the more advantageous it is for the miniaturization of the cosmetic instrument; however, considering the shortening of the life of the electrodes due to electrolysis, etc., it is necessary to appropriately design the structure of the cosmetic instrument.

[0048] Figure 5 is a perspective view (A) and a lengthwise cross-sectional view (B) of a skin cleaning device having a small electrolysis device according to the present application. As shown in Figure 5 , the skin cleaning device according to the present application includes a housing 10, a tank 20, a pump 30, an electrolysis chamber 40, and an electrolysis circuit board 80, and preferably further includes a vibration cleaning section 50.

[0049] The housing 10 can be provided in a substantially cylindrical shape so that a user can hold the skin cleaning device by hand or use it by mounting a handle; the tank 20, the pump 30, the electrolysis chamber 40, the vibration cleaning section 50, etc. can be accommodated inside the housing 10 or mounted at one end of the housing 10. For example, as shown in Figure 5 , the tank 20 can be combined at one end of the housing 10, and the pump 30 and the electrolysis chamber 40 can be mounted inside. In Figure 5 , reference numeral 32 is a flow path tube 32 connecting the tank 20 and the electrolysis chamber 40.

[0050] The water tank 20 is a container for containing water that is a medium for generating and supplying microbubbles. The pump 30 draws the water contained in the water tank 20 and delivers the drawn water at a predetermined pressure in a manner that the drawn water is sprayed to the user's skin through the electrolysis chamber 40. The pump 30 can be driven by a battery (not shown) installed in the inside of the housing 10. The electrolysis chamber 40 generates water containing microbubbles by electrolyzing the water supplied from the pump 30.

[0051] Figure 6 and Figure 7 are a sectional view and an internal perspective view showing the structure of the electrolysis chamber 40 usable in the skin-cleaning device according to an embodiment of the present application. As shown in Figure 6 and 7 , the electrolysis chamber 40 includes a bubble chamber 42 that provides spaces 42a, 42b for water to pass through and be electrolyzed to generate microbubbles, first and second electrodes 44, 46 disposed inside the bubble chamber 42 and facing each other at a predetermined interval, an electrode separation plate 48 between the first and second electrodes 44, 46, and a water outlet 43 that supplies the water containing microbubbles to the user's skin. The first and second electrodes 44, 46 are connected to an electrolysis circuit board 80 (see Figure 5 ) including the above-mentioned power supply unit 100, power supply supply control unit 200, current measurement unit 300, electrode polarity conversion unit 400, and system control unit 500 through first and second electrode terminals 44a, 46a connected thereto, respectively. That is, the electrolysis circuit board 80 applies a voltage to the first and second electrodes 44, 46 to electrolyze the water between the first and second electrodes 44, 46, thereby causing the generation of microbubbles inside the water. When a current is supplied to the first and second electrodes 44, 46 through the electrolysis circuit board 80, a portion of the water passing through the first and second electrodes 44, 46 is electrolyzed to generate water containing microbubbles, which is discharged through the water outlet 43.

[0052] As shown in Figure 6 and Figure 7 , the bubble chamber 42 can have a shape divided into upper and lower portions with the electrodes 44, 46 located at the center thereof as a center; water that has not been electrolyzed to generate microbubbles can be supplied to the lower bubble chamber 42a through a water inlet 41, and water that has been electrolyzed to generate microbubbles can be discharged from the upper bubble chamber 42b through the water outlet 43.

[0053] As shown in Figure 5As shown, the water outlet 43 penetrates the vibration cleaning portion 50 and is exposed to the outside. Water supplied from the pump 30 to the electrolysis chamber 40 is supplied to the user's skin through the water outlet 43 provided in the vibration cleaning portion 50, in which micro-bubbles are generated. The vibration cleaning portion 50 is located at one end of the housing 10, and is a portion that cleans the skin by contact with the user's skin and by friction. The vibration cleaning portion 50 includes a vibration plate 52 that can vibrate in the up-and-down direction, i.e., the direction perpendicular to the surface of the vibration cleaning portion 50, and a cleaning pad 54 formed on the upper portion of the vibration plate 52. If necessary, the vibration cleaning portion 50 can further include a flexible connection portion 56 that connects the vibration plate 52 and the open side end portion of the housing 10. A through-hole can be formed in the vibration cleaning portion 50, particularly in the vibration plate 52 and the cleaning pad 54, to expose the water outlet 43 of the electrolysis chamber 40 to the outside. The cleaning pad 54 contacts the skin and rubs against the skin while vibrating in the up-and-down direction along with the vibration plate 52, thereby performing a skin cleaning function.

[0054] Figure 8 FIG. 4 is a view showing another example of the electrolysis chamber 40 to which the compact electrolysis device of the present application is applied. Figure 8 In the example shown, the electrolysis chamber 40 can have a rectangular parallelepiped structure in a unidirectionally extended form. The first and second electrodes 44 and 46, which are flat plates unidirectionally extended, face each other at a predetermined interval inside the electrolysis chamber 40. The first and second electrodes 44 and 46 are connected to the circuit board including the power supply portion 100, the power supply supply control portion 200, the current measurement portion 300, the electrode polarity conversion portion 400, and the system control portion 500 through the first electrode terminal 44a and the second electrode terminal 46a. In addition, one end of the electrolysis chamber 40 is formed with the flow path tube 32 connected to the water tank 20, and the other end is formed with the water outlet 43 through which water in which micro-bubbles are generated is supplied to the user's skin.

[0055] In the electrolysis device of the present application, the amount of liquid present between the electrodes 44 and 46 is detected by detecting the current flowing between the pair of electrodes 44 and 46 used in electrolysis, and the power supply is adjusted based on this to prevent overcurrent from flowing between the electrodes 44 and 46, thereby ensuring the safety of the user.

[0056] Further, in the case of a small electrolysis device used in a home skin cleaning device, since electrolysis is performed in a very small space, scale or scale fixation can occur on the electrodes 44, 46, and the electrolysis chamber 40, particularly the space between the electrodes 44, 46, can be saturated with microbubbles (or nanobubbles). Therefore, in the present application, by periodically switching the polarity of the voltage applied to the electrodes 44, 46 at predetermined time intervals, scale and microbubbles can be inhibited from being generated, and the life of the electrodes 44, 46 for electrolysis can be extended. When the polarity of the voltage applied to the electrodes 44, 46 is periodically switched, microbubbles (or nanobubbles) that have not yet completely moved or dissipated and are densely present on the electrodes 44, 46 will be pushed away from the electrodes 44, 46, and thus a decrease in the efficiency of electrolysis can be prevented.

[0057] The electrolysis device of the present application not only has excellent electrolysis efficiency, but also can improve the durability and safety of the electrodes 44, 46 for electrolysis, and thus can be used more safely. Further, according to the electrolysis device of the present application, the pair of electrodes 44, 46 can be disposed facing and close to each other, and thus miniaturization can be easily achieved, and can be applicable to a small-sized skin beauty instrument.

[0058] Although the present application has been described above with reference to the accompanying drawings and exemplary embodiments, the present application is not limited to the contents shown in the drawings and the above-described embodiments. In the following claims, reference numerals are annotated for the convenience of understanding, but the scope of the following claims is not limited to the reference numerals and the contents shown in the drawings, but should be interpreted in a broad manner so as to include all modifications, equivalent structures, and functions of the exemplary embodiments.

[0059] Industrial applicability

[0060] The present application provides an electrolysis device of water and a skin cleaning device including the same.

Claims

1. An apparatus for electrolysis of water, characterized in that comprises: a pair of electrodes (44, 46) disposed facing each other, which electrolyze water by applying a voltage to the water, thereby generating microbubbles inside the water; a power supply section (100) which outputs a voltage to be applied to the electrodes (44, 46); a power supply feeding control section (200) which applies the voltage output from the power supply section (100) to the electrodes (44, 46) or cuts off the voltage, in accordance with a drive signal from a system control section (500); a current measurement section (300) which detects an amount of current flowing through the electrodes (44, 46) supplied from the power supply feeding control section (200) to the electrodes (44, 46); an electrode polarity conversion section (400) which converts a polarity of the voltage applied to the electrodes (44, 46) by the power supply feeding control section (200), in accordance with a polarity conversion signal from the system control section (500); and the system control section (500) which controls the power supply feeding control section (200) and controls an operation of the electrode polarity conversion section (400) in accordance with the amount of current detected by the current measurement section (300).

2. The water electrolysis device according to claim 1, wherein the system control section (500) judges an amount of water present between the electrodes (44, 46) in accordance with the amount of current detected by the current measurement section (300), and cuts off the drive signal output to the power supply feeding control section (200) to cut off the voltage applied to the electrodes (44, 46) when a flow of water passing between the electrodes (44, 46) is abnormal.

3. The water electrolysis device according to claim 1, wherein the system control section (500) periodically outputs the polarity conversion signal to the electrode polarity conversion section (400) to periodically convert the polarity of the voltage applied to the electrodes (44, 46), respectively.

4. The water electrolysis device according to claim 1, wherein the current measurement section (300) comprises: a current sensor (310) which detects a change in the voltage (VELD_IN) applied to the electrode polarity conversion section (400) and generates a current signal corresponding to the amount of current flowing in the electrodes (44, 46); an amplifier (320) which amplifies the current signal generated by the current sensor (310) to generate an amplified current signal; and a low-pass filter (330) which removes noise from the amplified current signal and outputs a current signal (I_SENSE) corresponding to the amount of current flowing in the electrodes (44, 46).

5. The water electrolysis device according to claim 1, wherein the electrode polarity conversion section (400) comprises: a relay switch (410) which receives the voltage (VELD_IN) from the power supply feeding control section (200) and outputs to the electrodes (44, 46) and is capable of converting the polarity of the voltage (VELD_IN) output to the electrodes (44, 46); and ​ A polarity switching switch (420) controls the relay switch (410) to switch the polarity of the voltage (VELD_IN) output to the electrodes (44, 46) in accordance with a polarity switching signal (ELD_SWITCH, high / low) input from the system control section (500).

6. The water electrolysis device according to claim 1, wherein The power supply section (100) includes: a direct current voltage smoothing and stabilizing section (110) that smoothes and stabilizes a direct current voltage (DC VELD) output from a battery; and a step-up voltage regulator (120) that steps up the direct current voltage stabilized by the direct current voltage smoothing and stabilizing section (110) to a voltage required for electrolysis.

7. The water electrolysis device according to claim 1, wherein The power supply feeding control section (200) includes: a power supply feeding switch (210) that applies the voltage output from the power supply section (100) to the electrodes (44, 46) or cuts off the voltage through the current measuring section (300) and the electrode polarity switching section (400); and a power supply feeding switch control switch (220) that is used to turn on / off the power supply feeding switch (210) in accordance with a drive signal (ELD_PWR_EN) from the system control section (500).

8. A skin cleaning device characterized by, includes: a water tank (20) that is coupled to one end of a housing (10) and that contains water; a pump (30) that draws the water contained in the water tank (20) and that delivers the drawn water at a predetermined pressure in a manner that the drawn water is sprayed to a user's skin through an electrolysis chamber (40); the electrolysis chamber (40) includes a pair of electrodes (44, 46) disposed to face each other and electrolyzes the water supplied from the pump (30) to generate water containing microbubbles; and the electrolysis circuit board (80) includes: a power supply section (100) that outputs a voltage applied to the electrodes (44, 46); a power supply feeding control section (200) that applies the voltage output from the power supply section (100) to the electrodes (44, 46) or cuts off the voltage in accordance with a drive signal from a system control section (500); a current measuring section (300) that detects an amount of current flowing through the electrodes (44, 46) supplied to the electrodes (44, 46) through the power supply feeding control section (200); an electrode polarity switching section (400) that switches the polarity of the voltage applied to the electrodes (44, 46) through the power supply feeding control section (200) in accordance with a polarity switching signal from the system control section (500); and the system control section (500) that controls the power supply feeding control section (200) and controls the operation of the electrode polarity switching section (400) in accordance with the amount of current detected by the current measuring section (300). ​ ​

Images