A positive and negative electrode switching circuit for an electrode sheet

Abstract

This application discloses a positive and negative electrode switching circuit for an electrode plate, including a power supply circuit, an electrolysis circuit, a switching circuit, and a main control circuit. The control signal input terminal of the main control circuit is connected to the output terminal of the switching circuit. The positive signal output terminal of the main control circuit is connected to the first control signal input terminal of the electrolysis circuit, and the negative signal output terminal of the main control circuit is connected to the second control signal input terminal of the electrolysis circuit. When the main control circuit receives a start signal, its positive and negative signal output terminals alternately output control signals to switch the positive and negative electrodes of the electrode plate group. This application, by alternately outputting positive and negative control signals by the main control circuit, ensures that the positive and negative electrodes of the electrode plate continuously switch during water electrolysis. This prevents scale-forming ions such as calcium and magnesium ions in the water from accumulating on the surface of the electrode plate, thus improving the disinfection effect of the purification and disinfection machine. It also prevents scale from corroding the electrode plate, which would reduce its electrolysis efficiency.

Description

[Technical Field]

[0002] This utility model relates to the field of purification and disinfection machine technology, and in particular to a positive and negative electrode switching circuit for an electrode sheet. [Background Technology]

[0004] A fruit and vegetable purifier is used to clean the surface of fruits and vegetables, mainly by generating ozone or electrolyzing water to purify them.

[0005] However, in existing fruit and vegetable purifiers, the positive and negative electrodes of the plates are fixed during water electrolysis. Since water commonly contains calcium and magnesium ions, these ions undergo oxidation-reduction reactions on the surface of a specific electrode (usually the anode) during electrolysis, generating substances such as calcium carbonate and magnesium hydroxide that are poorly soluble in water. With prolonged use, scale eventually forms on the surface of the electrodes, significantly reducing electrolysis efficiency and affecting the cleaning and disinfection effects of the purifier. Furthermore, scale can corrode the electrodes, shortening their lifespan. [Utility Model Content]

[0007] To address the technical problem that the positive and negative poles of current electrode plates are fixed, which leads to scale formation on the surface of the electrode plates, resulting in reduced electrolysis efficiency and poor cleaning and disinfection effects, this utility model provides a positive and negative pole switching circuit for electrode plates.

[0008] To achieve the above objectives, this utility model is implemented by the following technical solution:

[0009] A positive / negative switching circuit for an electrode sheet, comprising:

[0010] A power supply circuit, which is connected to the battery, is used to provide a stable electrolytic current;

[0011] An electrolysis circuit, wherein the input terminal of the electrolysis circuit is connected to the power output terminal of the power supply circuit, and the output terminal of the electrolysis circuit is electrically connected to the electrode plate group, and the electrolysis circuit is used to transmit electrolysis current to the electrode plate group for water electrolysis;

[0012] A switching circuit, wherein the switching circuit is used to output a start signal;

[0013] The main control circuit has its control signal input terminal connected to the output terminal of the switching circuit, its positive signal output terminal connected to the first control signal input terminal of the electrolysis circuit, and its negative signal output terminal connected to the second control signal input terminal of the electrolysis circuit.

[0014] When the main control circuit receives the start signal, the positive and negative signal output terminals of the main control circuit alternately output control signals to switch the positive and negative poles of the electrode group.

[0015] By adopting the above technical solution, the main control circuit alternately outputs positive and negative control signals, so that the positive and negative poles of the electrode plates will switch continuously during water electrolysis. This prevents scale-forming ions such as calcium and magnesium ions in the water from accumulating on the surface of the electrode plates and forming scale, which helps to improve the disinfection effect of the purification and disinfection machine. At the same time, it can also prevent scale from corroding the electrode plates and reducing the electrolysis efficiency of the electrode plates.

[0016] The positive and negative electrode switching circuit of the electrode sheet described above, wherein the electrolysis circuit includes:

[0017] The first electrolysis module has its input terminal connected to the power output terminal of the power supply circuit, its first control signal input terminal connected to the first electrolysis positive electrode signal output terminal of the main control circuit, its second control signal input terminal connected to the first electrolysis negative electrode signal output terminal of the main control circuit, and its output terminal electrically connected to the first electrode plate.

[0018] The second electrolysis module has its input terminal connected to the power output terminal of the power supply circuit, its first control signal input terminal connected to the second electrolysis positive signal output terminal of the main control circuit, its second control signal input terminal connected to the second electrolysis negative signal output terminal of the main control circuit, and its output terminal connected to the second electrode plate.

[0019] As described above, in an electrode plate positive and negative switching circuit, the first electrolysis module includes a first transistor, a first positive and negative switching unit, a first resistor, a second resistor, a third resistor, and a fourth resistor. The first electrolysis positive signal output terminal of the main control circuit is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the first transistor, the emitter of the first transistor is grounded, a fourth resistor is connected between the collector of the first transistor and the positive input terminal of the first positive and negative switching unit, and a third resistor is connected between the power output terminal of the power supply circuit and the positive input terminal of the first positive and negative switching unit.

[0020] The first electrolytic negative electrode signal output terminal of the main control circuit is connected to one end of the second resistor, the other end of the second resistor is connected to the negative electrode input terminal of the first positive and negative electrode switching unit, and the output terminal of the first positive and negative electrode switching unit is electrically connected to the first electrode plate.

[0021] As described above, in an electrode plate positive and negative switching circuit, the second electrolysis module includes a second transistor, a second positive and negative switching unit, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. The second electrolysis positive signal output terminal of the main control circuit is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the base of the second transistor, the emitter of the second transistor is grounded, the collector of the second transistor is connected to the positive input terminal of the second positive and negative switching unit, and the power output terminal of the power supply circuit is connected to the positive input terminal of the second positive and negative switching unit.

[0022] The second electrolytic negative electrode signal output terminal of the main control circuit is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the negative electrode input terminal of the second positive and negative electrode switching unit, and the output terminal of the second positive and negative electrode switching unit is electrically connected to the second electrode plate.

[0023] As described above, in an electrode plate positive / negative switching circuit, the power supply circuit includes:

[0024] The DC-DC module has its input terminal connected to the battery, its output terminal connected to the input terminal of the electrolysis circuit, and its current detection terminal connected to the current detection feedback terminal of the main control circuit.

[0025] The control module has its input terminal connected to the enable control terminal of the main control circuit and its output terminal connected to the input terminal of the DC-DC module. The control module is used to control the DC-DC module to stop outputting electrolytic current when the DC-DC module experiences overcurrent / overvoltage.

[0026] As described above, an electrode plate positive / negative switching circuit includes a DC-DC module comprising a DC-DC controller, a fifth field-effect transistor (FET), a sixth field-effect transistor (FET), a first inductor, a first diode, a second diode, a ninth resistor, a tenth resistor, an eleventh resistor, a first sampling resistor, and a second sampling resistor. A ninth resistor is connected between a battery and the gate of the fifth FET. The battery is also connected to the source of the fifth FET. The drain of the fifth FET is connected to one end of the first inductor. The other end of the first inductor is connected to the positive terminal of the first diode. The negative terminal of the first diode is connected to the input terminal of the electrolysis circuit. The other end of the first inductor is also connected to the drain of the sixth FET. The source of the sixth FET is grounded. The gate of the sixth FET is connected to the controlled terminal of the DC-DC controller. The output terminal of the DC-DC controller is connected to the common point of the tenth and eleventh resistors. The other end of the tenth resistor is grounded. The other end of the eleventh resistor is connected to the input terminal of the electrolysis circuit.

[0027] A first sampling resistor and a second sampling resistor are connected in parallel between the current detection terminal of the DC-DC controller and the current detection feedback terminal of the main control circuit.

[0028] As described above, in an electrode plate positive / negative switching circuit, the control module includes a third transistor, a twelfth resistor, and a thirteenth resistor. The enable control terminal of the main control circuit is connected to one end of the thirteenth resistor, and the other end of the thirteenth resistor is connected to the base of the third transistor. The emitter of the third transistor is grounded, and the collector of the third transistor is connected to the input terminal of the DC-DC module via the twelfth resistor.

[0029] As described above, the electrode plate positive and negative switching circuit includes:

[0030] A start-stop module is used to start the water purification and disinfection machine to electrolyze water. The output terminal of the start-stop module is connected to the control signal input terminal of the main control circuit.

[0031] A mode switching module is provided, which is used to switch the working mode of the purification and disinfection machine. The input terminal of the mode switching module is connected to the working mode output terminal of the main control circuit.

[0032] The electrode plate positive and negative switching circuit described above also includes a wireless charging circuit. The wireless charging circuit is used to wirelessly charge the battery. The DC power input terminal of the wireless charging circuit is connected to the DC power input terminal of the main control circuit, and the charging control terminal of the wireless charging circuit is connected to the charging control terminal of the main control circuit.

[0033] Compared with the prior art, the positive and negative electrode switching circuit of the electrode sheet proposed in this utility model has the following advantages:

[0034] 1. The positive and negative electrode switching circuit of the electrode plate proposed in this utility model will alternately output positive and negative control signals after the main control circuit receives the start signal, so that the positive and negative electrodes of the electrode plate will switch continuously during water electrolysis, avoiding the accumulation of scale-forming ions such as calcium and magnesium ions in the water on the surface of the electrode plate to form scale, which helps to improve the disinfection effect of the purification and disinfection machine, and at the same time avoids scale from corroding the electrode plate, which would reduce the electrolysis efficiency of the electrode plate. [Attached Image Description]

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0037] Figure 1 This is a block diagram illustrating the circuit principle structure of this utility model;

[0038] Figure 2 This is a schematic diagram of the power supply circuit of this utility model;

[0039] Figure 3 This is a schematic diagram of the electrolysis circuit of this utility model;

[0040] Figure 4 This is a schematic diagram of another part of the electrolysis circuit of this utility model;

[0041] Figure 5 This is a schematic diagram of the switching circuit of this utility model;

[0042] Figure 6 This is a schematic diagram of the main control circuit of this utility model;

[0043] Figure 7 This is a schematic diagram of the wireless charging circuit of this utility model.

[0044] Figure 8 This is a schematic diagram of the voltage regulator circuit of this utility model;

[0045] Figure 9 This is a schematic diagram of the LED display circuit of this utility model;

[0046] Figure 10 This is a schematic diagram of the programming circuit of this utility model.

Detailed Implementation Methods

[0048] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0049] The electrode plate positive and negative switching circuit proposed in this specification is applied in a purification and disinfection machine. The purification and disinfection machine can include, but is not limited to, fruit and vegetable purification machines, water purification machines, etc., which use electrode plates for disinfection. This specification mainly uses a fruit and vegetable purification machine as an example to illustrate the implementation scenario. Other purification and disinfection machines can be implemented by referring to this scenario, and this application will not elaborate further.

[0050] Specific embodiments, combined with Figures 1 to 10 As shown, further illustrating the technical solution of this utility model, a positive and negative electrode switching circuit for an electrode sheet includes a power supply circuit 100, an electrolysis circuit 200, a switching circuit 300, and a main control circuit 400. The power supply circuit 100 is connected to a battery and is used to provide a stable electrolysis current. The input terminal of the electrolysis circuit 200 is connected to the power output terminal of the power supply circuit 100, and the output terminal of the electrolysis circuit 200 is electrically connected to the electrode sheet assembly. The electrolysis circuit 200 is used to transmit the electrolysis current to the electrode sheet assembly for water electrolysis. The switching circuit 300 is used to output a start signal to start the purification and disinfection machine. The control signal input terminal of the main control circuit 400 is connected to the output terminal of the switching circuit 300. The positive signal output terminal of the main control circuit 400 is connected to the first control signal input terminal of the electrolysis circuit 200, and the negative signal output terminal of the main control circuit 400 is connected to the second control signal input terminal of the electrolysis circuit 200.

[0051] When the main control circuit 400 receives the start signal, the positive signal output terminal and the negative signal output terminal of the main control circuit 400 alternately output control signals to switch the positive and negative poles of the electrode sheet group.

[0052] In this embodiment, the main control circuit alternately outputs positive and negative control signals, so that the positive and negative poles of the electrode plates will continuously switch during water electrolysis. This prevents scale-forming ions such as calcium and magnesium ions in the water from accumulating on the surface of the electrode plates and forming scale, which helps to improve the disinfection effect of the purification and disinfection machine. At the same time, it can also prevent scale from corroding the electrode plates and reducing the electrolysis efficiency of the electrode plates.

[0053] Furthermore, the aforementioned electrode assembly includes at least a first electrode and a second electrode.

[0054] Furthermore, the positive signal output terminal of the main control circuit 400 includes a first electrolysis positive signal output terminal and a second electrolysis positive signal output terminal, and the negative signal output terminal of the main control circuit 400 includes a first electrolysis negative signal output terminal and a second electrolysis negative signal output terminal.

[0055] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the electrolysis circuit 200 includes a first electrolysis module 210 and a second electrolysis module 220. The input terminal of the first electrolysis module 210 is connected to the power output terminal of the power supply circuit 100. The first control signal input terminal of the first electrolysis module 210 is connected to the first electrolysis positive signal output terminal of the main control circuit 400. The second control signal input terminal of the first electrolysis module 210 is connected to the first electrolysis negative signal output terminal of the main control circuit 400. The output terminal of the first electrolysis module 210 is electrically connected to a first electrode plate. The input terminal of the second electrolysis module 220 is connected to the power output terminal of the power supply circuit 100. The first control signal input terminal of the second electrolysis module 220 is connected to the second electrolysis positive signal output terminal of the main control circuit 400. The second control signal input terminal of the second electrolysis module 220 is connected to the second electrolysis negative signal output terminal of the main control circuit 400. The output terminal of the second electrolysis module 220 is connected to a second electrode plate.

[0056] In a preferred embodiment, the first electrolysis module 210 includes a first transistor Q5, a first positive / negative electrode switching unit U4, a first resistor R14, a second resistor R40, a third resistor R42, and a fourth resistor R43. The first electrolysis positive electrode signal output terminal (i.e., the AH terminal in this embodiment) of the main control circuit 400 is connected to one end of the first resistor R14, and the other end of the first resistor R14 is connected to the base of the first transistor Q5. The emitter of the first transistor Q5 is grounded, and the collector of the first transistor Q5 is connected to the positive input terminal of the first positive / negative electrode switching unit U4 via the fourth resistor R43. The power output terminal (i.e., the V-DJ terminal in this embodiment) of the power supply circuit 100 is connected to the positive input terminal of the first positive / negative electrode switching unit U4 via the third resistor R42.

[0057] The first electrolytic negative electrode signal output terminal (i.e., the AL terminal in this embodiment) of the main control circuit 400 is connected to one end of the second resistor R40, the other end of the second resistor R40 is connected to the negative electrode input terminal of the first positive and negative electrode switching unit U4, and the output terminal of the first positive and negative electrode switching unit U4 (i.e., the DJ-A2 terminal in this embodiment) is electrically connected to the first electrode plate.

[0058] Alternatively, the aforementioned first positive and negative switching unit U4 includes a first field-effect transistor D1 and a second field-effect transistor D2, with the drain of the first field-effect transistor D1 and the drain of the second field-effect transistor D2 connected in parallel.

[0059] Specifically, when the fruit and vegetable purifier is started, the main control circuit 400 receives a start signal. At this time, the first electrolytic positive signal output terminal (i.e., AH terminal) of the main control circuit 400 outputs a high level, and the first electrolytic negative signal output terminal (i.e., AL terminal) of the main control circuit 400 outputs a low level. The base of the first transistor Q5 is turned on after receiving the high-level signal output from the first electrolytic positive signal output terminal of the main control circuit 400, thereby turning on the second field-effect transistor D1. Since the first electrolytic negative signal output terminal of the main control circuit 400 outputs a low level, the first field-effect transistor D2 is turned off. At this time, the positive terminal of the first electrolysis module 210 outputs electrolytic current.

[0060] After the fruit and vegetable purifier has been running for a period of time, the first electrolytic positive signal output terminal (i.e., AH terminal) of the main control circuit 400 outputs a low level, and the first electrolytic negative signal output terminal (i.e. AL terminal) of the main control circuit 400 outputs a high level. At this time, the base of the first transistor Q5 receives a low level and will switch from the on state to the off state. The second field-effect transistor D1 will also switch from the on state to the off state. The first field-effect transistor D2 receives a high level and will switch from the off state to the on state. The first electrolytic module 210 outputs electrolytic current at the negative terminal.

[0061] In this embodiment, the main control circuit can change the conditions for scale formation by dynamically switching the positive and negative signals of the first electrolysis module, thereby preventing scale from forming on the surface of the electrode plates due to long-term unipolar electrolysis, effectively protecting the performance of the electrode plates and ensuring electrolysis efficiency.

[0062] In a preferred embodiment, the second electrolysis module 220 includes a second transistor Q13, a second positive / negative electrode switching unit U5, a fifth resistor R44, a sixth resistor R45, a seventh resistor R47, and an eighth resistor R48. The second electrolysis positive electrode signal output terminal (i.e., the BH terminal in this embodiment) of the main control circuit 400 is connected to one end of the sixth resistor R45, and the other end of the sixth resistor R45 is connected to the base of the second transistor Q13. The emitter of the second transistor Q13 is grounded, and the collector of the second transistor Q13 is connected to the positive input terminal of the second positive / negative electrode switching unit U5 via the eighth resistor R48. The power output terminal (i.e., the V-DJ terminal in this embodiment) of the power supply circuit 100 is connected to the positive input terminal of the second positive / negative electrode switching unit U5 via the seventh resistor R47.

[0063] The second electrolytic negative electrode signal output terminal of the main control circuit 400 (i.e., the BL terminal in this embodiment) is connected to one end of the fifth resistor R44, the other end of the fifth resistor R44 is connected to the negative electrode input terminal of the second positive and negative electrode switching unit U5, and the output terminal of the second positive and negative electrode switching unit U5 (i.e., the DJ-B2 terminal in this embodiment) is electrically connected to the second electrode plate.

[0064] Alternatively, the aforementioned second positive and negative switching unit U5 includes a third field-effect transistor D3 and a fourth field-effect transistor D4, with the drain of the third field-effect transistor D3 and the drain of the fourth field-effect transistor D4 connected in parallel.

[0065] Specifically, when the fruit and vegetable purifier is started, the main control circuit 400 receives a start signal. At this time, the second electrolytic positive signal output terminal (i.e., BH terminal) of the main control circuit 400 outputs a high level, and the second electrolytic negative signal output terminal (i.e., BL terminal) of the main control circuit 400 outputs a low level. The base of the second transistor Q13 is turned on after receiving the high-level signal output from the second electrolytic positive signal output terminal of the main control circuit 400, thereby turning on the fourth field-effect transistor D4. Since the second electrolytic negative signal output terminal of the main control circuit 400 outputs a low level, the third field-effect transistor D3 is turned off. At this time, the positive terminal of the second electrolysis module 220 outputs electrolytic current.

[0066] After the fruit and vegetable purifier has been running for a period of time, the second electrolytic positive signal output terminal (i.e., BH terminal) of the main control circuit 400 outputs a low level, and the second electrolytic negative signal output terminal (i.e., BL terminal) of the main control circuit 400 outputs a high level. At this time, the base of the second transistor Q13 receives a low level and will switch from the on state to the off state. The fourth field-effect transistor D4 will also switch from the on state to the off state. The third field-effect transistor D3 receives a high level and will switch from the off state to the on state. The second electrolytic module 220 outputs electrolytic current at the negative terminal.

[0067] In this embodiment, the main control circuit can change the conditions for scale formation by dynamically switching the positive and negative signals of the second electrolysis module, thereby preventing scale from forming on the surface of the electrode plates due to long-term unipolar electrolysis, effectively protecting the performance of the electrode plates and ensuring electrolysis efficiency.

[0068] It should be noted that the switching between positive and negative terminals of the first electrolysis module 210 and the second electrolysis module 220 is performed synchronously, and the alternating output between the positive and negative signal output terminals of the main control circuit 400 is achieved by pre-set parameters. The parameter settings can be set to exchange once every 30 seconds. This application does not make specific limitations on the specific parameter settings.

[0069] Furthermore, as a preferred embodiment of this solution and not a limitation, the power supply circuit 100 includes a DC-DC module 110 and a control module 120. The input terminal of the DC-DC module 110 is connected to the battery, the output terminal of the DC-DC module 110 is connected to the input terminal of the electrolysis circuit 200, the current detection terminal of the DC-DC module 110 is connected to the current detection feedback terminal of the main control circuit 400, the input terminal of the control module 120 is connected to the enable control terminal of the main control circuit 400, and the output terminal of the control module 120 is connected to the input terminal of the DC-DC module 110. The control module 120 is used to control the DC-DC module 110 to stop outputting electrolytic current when an overcurrent / overvoltage occurs in the DC-DC module 110.

[0070] In this embodiment, the control module can detect the current / voltage status of the DC-DC module in real time, and when the DC-DC module experiences overcurrent / overvoltage, it promptly controls the DC-DC module 110 to stop outputting electrolytic current, thereby preventing damage to the electrolytic circuit due to overcurrent / overvoltage, avoiding burning out the electrode plates, and ensuring the reliability of the purification and disinfection machine. Secondly, a stable electrolytic current can ensure that the electrolytic reaction proceeds continuously and stably, which helps to generate an appropriate amount of cleaning and disinfecting substances and improve the disinfection capacity of the purification and disinfection machine.

[0071] In a preferred embodiment, the DC-DC module 110 includes a DC-DC controller U3, a fifth field-effect transistor Q12, a sixth field-effect transistor Q11, a first inductor L1, a first diode D2, a second diode D1, a ninth resistor R10, a tenth resistor R35, an eleventh resistor R36, a first sampling resistor R37, and a second sampling resistor R38. A ninth resistor R10 is connected between the battery and the gate of the fifth field-effect transistor Q12. The battery is also connected to the source of the fifth field-effect transistor Q12. The drain of the fifth field-effect transistor Q12 is connected to one end of the first inductor L1, and the other end of the first inductor L1 is connected to the positive terminal of the first diode D2. The first diode D2 is connected to the input terminal of the electrolytic circuit 200. The other end of the first inductor L1 is also connected to the drain of the sixth field-effect transistor Q11. The source of the sixth field-effect transistor Q11 is grounded. The gate of the sixth field-effect transistor Q11 is connected to the controlled terminal (i.e., the EXT terminal in this embodiment) of the DC-DC controller U3. The output terminal (i.e., the FB terminal in this embodiment) of the DC-DC controller U3 is connected to the common point of the tenth resistor R35 and the eleventh resistor R36. The other end of the tenth resistor R35 is grounded. The other end of the eleventh resistor R36 is connected to the input terminal of the electrolytic circuit 200.

[0072] The current detection terminal (i.e., the VS terminal in this embodiment) of the DC-DC controller U3 and the current detection feedback terminal (i.e., the PGND terminal in this embodiment) of the main control circuit 400 are connected in parallel with a first sampling resistor R37 and a second sampling resistor R38.

[0073] Alternatively, the DC-DC controller U3 is model ME2199ASG. In specific implementations, other DC-DC controller models can also be used for the DC-DC controller U3.

[0074] In a preferred embodiment, the control module 120 includes a third transistor Q6, a twelfth resistor R11, and a thirteenth resistor R20. The enable control terminal of the main control circuit 400 (i.e., the DJ-P-EN terminal in this embodiment) is connected to one end of the thirteenth resistor R20, and the other end of the thirteenth resistor R20 is connected to the base of the third transistor Q6. The emitter of the third transistor Q6 is grounded, and the collector of the third transistor Q6 is connected to the input terminal of the DC-DC module 110 via the twelfth resistor R11.

[0075] Specifically, the current detection terminal (i.e., VS terminal) of the aforementioned DC-DC controller U3 will collect the output current / voltage of the DC-DC module 110 in real time through the first sampling resistor R37 and the second sampling resistor R38. When the DC-DC module 110 experiences overcurrent / overvoltage, it will output an overcurrent / overvoltage signal to the current detection feedback terminal (i.e., PGND terminal) of the main control circuit 400. When the main control circuit 400 receives the overcurrent / overvoltage signal, it will output a high level through the enable control terminal (i.e., DJ-P-EN terminal) of the main control circuit. After the base of the third transistor Q6 receives the high level signal, it will conduct. At this time, the gate of the fifth field-effect transistor Q12 will be pulled down due to the conduction of the third transistor Q6, thereby turning off the fifth field-effect transistor Q12 and stopping the DC-DC module 110 from continuing to output electrolytic current to the electrolytic circuit 200.

[0076] Furthermore, as a preferred embodiment of this solution and not a limitation, the switching circuit 300 includes a start-stop module 310 and a mode switching module 320. The start-stop module 310 is used to start the purification and disinfection machine to perform water electrolysis. The output terminal of the start-stop module 310 is connected to the control signal input terminal of the main control circuit. The mode switching module 320 is used to switch the working mode of the purification and disinfection machine. The input terminal of the mode switching module 320 is connected to the working mode output terminal of the main control circuit 400.

[0077] In a preferred embodiment, the start / stop module 310 includes a push-button switch terminal J2 and a fourteenth resistor R18. The push-button switch terminal J2 is connected to one end of the fourteenth resistor R18, and the other end of the fourteenth resistor R18 is connected to the control signal input terminal of the main control circuit 400 (i.e., the KEY1 terminal in this embodiment).

[0078] Specifically, the push-button switch terminal J2 is connected to an external start switch. When the user presses the start switch, the fruit and vegetable purifier starts working. After the main control circuit receives the start signal, it will alternately output control signals through the positive signal output terminal and the negative signal output terminal to switch the positive and negative poles of the electrode plates. This avoids the formation of scale on the surface of the electrode plates, which would affect the water quality, and also avoids scale from corroding the electrode plates, thus maintaining a stable electrolysis efficiency.

[0079] In a preferred embodiment, the mode switching module 320 includes a fifteenth resistor R31, a sixteenth resistor R28, a seventeenth resistor R25, a fourth transistor Q9, a fifth transistor Q8, and a sixth transistor Q7. The first operating mode output terminal of the main control circuit 400 (i.e., the KLED-B terminal in this embodiment) is connected to one end of the fifteenth resistor R31, and the other end of the fifteenth resistor R31 is connected to the base of the fourth transistor Q9. The emitter of the fourth transistor Q9 is grounded, and the collector of the fourth transistor Q9 is connected to the key switch terminal J2. The second operating mode output terminal of the main control circuit 400 (i.e., the KLED-B terminal in this embodiment) is connected to the base of the fourth transistor Q9. The KLED-W terminal of the example is connected to one end of the sixteenth resistor R28, the other end of the sixteenth resistor R28 is connected to the base of the fifth transistor Q8, the emitter of the fifth transistor Q8 is grounded, the collector of the fifth transistor Q8 is connected to the push-button switch terminal J2, the third working mode output terminal of the main control circuit 400 (i.e., the KLED-R terminal in this embodiment) is connected to one end of the seventeenth resistor R25, the other end of the seventeenth resistor R25 is connected to the base of the sixth transistor Q7, the emitter of the sixth transistor Q7 is grounded, and the collector of the sixth transistor Q7 is connected to the push-button switch terminal J2.

[0080] Furthermore, as a preferred embodiment of this solution and not a limitation, the main control circuit 400 includes a main control chip U2, the preferred model of which is SC8F073AD720SA. In specific implementations, other models of the main control chip U2 may also be selected instead.

[0081] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a wireless charging circuit 500, which is used to wirelessly charge the battery. The DC power input terminal of the wireless charging circuit 500 is connected to the DC power input terminal of the main control circuit 400, and the charging control terminal of the wireless charging circuit 500 is connected to the charging control terminal of the main control circuit 400.

[0082] In a preferred embodiment, the wireless charging circuit 500 includes a battery charging port J3, a receiving coil L2, a seventh field-effect transistor Q14, a seventh transistor Q2, an eighth transistor Q1, a ninth transistor Q3, a third diode D3, a fourth diode D4, an eighteenth resistor R8, a nineteenth resistor R4, and a twentieth resistor R3. The neutral wire of the receiving coil L2 is grounded, the live wire (i.e., L-terminal) of the receiving coil L2 is connected to the positive terminal of the fourth diode D4, and the negative terminal of the fourth diode D4 is connected to the twentieth resistor R3. One end of the resistor R3 is connected to the base of the ninth transistor Q3. The emitter of the ninth transistor Q3 is grounded. The collector of the ninth transistor Q3 is connected to the DC power input terminal (i.e., the DC-IN terminal in this embodiment) of the main control circuit 400. The negative terminal of the fourth diode D4 is also connected to the source of the seventh field-effect transistor Q14. The drain of the seventh field-effect transistor Q14 is connected to the positive terminal of the third diode D3. The negative terminal of the third diode D3 is connected to the battery charging port J3.

[0083] The charging control terminal of the main control circuit 400 (i.e., the CHR-DIS terminal in this embodiment) is connected to one end of the eighteenth resistor R8, the other end of the eighteenth resistor R8 is connected to the base of the seventh transistor Q2, the emitter of the seventh transistor Q2 is grounded, the collector of the seventh transistor Q2 is connected to one end of the nineteenth resistor R4, the other end of the nineteenth resistor R4 is connected to the base of the eighth transistor Q1, and the collector of the eighth transistor Q1 is connected to the gate of the seventh field-effect transistor Q14.

[0084] Specifically, when the fruit and vegetable purifier is wirelessly charging, when the receiving coil L2 senses the alternating current flowing through the transmitting coil (wireless charger), according to Faraday's law of electromagnetic induction, the receiving coil L2 will induce an electromotive force, generating a current, thereby wirelessly charging the battery inside the fruit and vegetable purifier. The charging signal is also fed back in real time to the DC power input terminal (DC-IN terminal) of the main control circuit 400 through the ninth transistor Q3. During charging, if an abnormal charging signal occurs, the charging control terminal (CHR-DIS terminal) of the main control circuit 400 will output a high level. At this time, the base of the seventh transistor Q2 receives the high-level signal and conducts, thus turning on the eighth transistor Q1. The gate voltage of the seventh field-effect transistor Q14 will be pulled low due to the conduction of the eighth transistor Q1, meaning the seventh field-effect transistor Q14 will be cut off, stopping wireless charging.

[0085] The aforementioned abnormal charging signal could be due to the battery being fully charged or the wireless charging process being interrupted midway.

[0086] In this embodiment, the fruit and vegetable purifier is equipped with wireless charging, which allows users to charge the purifier without any plugging or unplugging action, providing greater charging freedom and greatly improving charging convenience. Secondly, the main control circuit can also monitor the charging status in real time to ensure stability and safety during the charging process.

[0087] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a voltage regulator circuit 600, which is used to provide a stable operating voltage for the main control circuit 400. The input terminal of the voltage regulator circuit 600 is connected to the battery, and the output terminal of the voltage regulator circuit 600 is connected to the power supply terminal of the main control circuit 400.

[0088] In a preferred embodiment, the voltage regulator circuit 600 includes a voltage regulator chip U1 and a 21st resistor R2. The battery is connected to one end of the 21st resistor R2, and the other end of the 21st resistor R2 is connected to the input terminal (i.e., the Vin terminal in this embodiment) of the voltage regulator chip U1. The output terminal (i.e., the +5V terminal in this embodiment) of the voltage regulator chip U1 is connected to the power supply terminal (i.e., the VDD terminal in this embodiment) of the main control circuit.

[0089] In this embodiment, the voltage regulator chip can stabilize the voltage provided by the battery within the operating voltage range of the main control circuit, avoiding abnormalities in the main control circuit caused by voltage instability; secondly, a stable power supply can ensure that the internal circuit structure of the main control circuit and all modules connected to the main control circuit can operate normally, reducing interference caused by voltage fluctuations or power supply noise and lowering the system failure rate.

[0090] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes an LED display circuit 700, which is connected to the LED display terminal of the main control circuit 400, and is used to display the working status of the electrode assembly.

[0091] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a program burning circuit 800, which is used to burn a program, the program including the above-mentioned parameter settings for realizing alternating output of positive and negative control signals and the program settings for the working mode.

[0092] Those skilled in the art should understand that the above description is one embodiment provided in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Furthermore, due to differences in industry naming conventions, it is not limited to the above names or English names. Any methods or structures similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. A positive and negative electrode switching circuit for an electrode plate, wherein the electrode plate is used in a purification and disinfection machine, characterized in that, include: A power supply circuit, which is connected to the battery, is used to provide a stable electrolytic current; An electrolysis circuit, wherein the input terminal of the electrolysis circuit is connected to the power output terminal of the power supply circuit, and the output terminal of the electrolysis circuit is electrically connected to the electrode plate group, and the electrolysis circuit is used to transmit electrolysis current to the electrode plate group for water electrolysis; A switching circuit, wherein the switching circuit is used to output a start signal; The main control circuit has its control signal input terminal connected to the output terminal of the switching circuit, its positive signal output terminal connected to the first control signal input terminal of the electrolysis circuit, and its negative signal output terminal connected to the second control signal input terminal of the electrolysis circuit. When the main control circuit receives the start signal, the positive and negative signal output terminals of the main control circuit alternately output control signals to switch the positive and negative poles of the electrode group.

2. The positive and negative electrode switching circuit for an electrode sheet according to claim 1, characterized in that, The electrolysis circuit includes: The first electrolysis module has its input terminal connected to the power output terminal of the power supply circuit, its first control signal input terminal connected to the first electrolysis positive electrode signal output terminal of the main control circuit, its second control signal input terminal connected to the first electrolysis negative electrode signal output terminal of the main control circuit, and its output terminal electrically connected to the first electrode plate. The second electrolysis module has its input terminal connected to the power output terminal of the power supply circuit, its first control signal input terminal connected to the second electrolysis positive signal output terminal of the main control circuit, its second control signal input terminal connected to the second electrolysis negative signal output terminal of the main control circuit, and its output terminal connected to the second electrode plate.

3. The positive and negative electrode switching circuit for an electrode sheet according to claim 2, characterized in that, The first electrolysis module includes a first transistor, a first positive-negative switching unit, a first resistor, a second resistor, a third resistor, and a fourth resistor. The first electrolysis positive signal output terminal of the main control circuit is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the first transistor, the emitter of the first transistor is grounded, and a fourth resistor is connected between the collector of the first transistor and the positive input terminal of the first positive-negative switching unit. A third resistor is connected between the power output terminal of the power supply circuit and the positive input terminal of the first positive-negative switching unit. The first electrolytic negative electrode signal output terminal of the main control circuit is connected to one end of the second resistor, the other end of the second resistor is connected to the negative electrode input terminal of the first positive and negative electrode switching unit, and the output terminal of the first positive and negative electrode switching unit is electrically connected to the first electrode plate.

4. The positive and negative electrode switching circuit for an electrode sheet according to claim 2, characterized in that, The second electrolysis module includes a second transistor, a second positive / negative electrode switching unit, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. The second electrolysis positive electrode signal output terminal of the main control circuit is connected to one end of the sixth resistor, and the other end of the sixth resistor is connected to the base of the second transistor. The emitter of the second transistor is grounded. An eighth resistor is connected between the collector of the second transistor and the positive input terminal of the second positive / negative electrode switching unit. A seventh resistor is connected between the power output terminal of the power supply circuit and the positive input terminal of the second positive / negative electrode switching unit. The second electrolytic negative electrode signal output terminal of the main control circuit is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the negative electrode input terminal of the second positive and negative electrode switching unit, and the output terminal of the second positive and negative electrode switching unit is electrically connected to the second electrode plate.

5. The positive and negative electrode switching circuit for an electrode sheet according to claim 1, characterized in that, The power supply circuit includes: The DC-DC module has its input terminal connected to the battery, its output terminal connected to the input terminal of the electrolysis circuit, and its current detection terminal connected to the current detection feedback terminal of the main control circuit. The control module has its input terminal connected to the enable control terminal of the main control circuit and its output terminal connected to the input terminal of the DC-DC module. The control module is used to control the DC-DC module to stop outputting electrolytic current when the DC-DC module experiences overcurrent / overvoltage.

6. The positive and negative electrode switching circuit for an electrode sheet according to claim 5, characterized in that, The DC-DC module includes a DC-DC controller, a fifth field-effect transistor (FET), a sixth field-effect transistor (FET), a first inductor, a first diode, a second diode, a ninth resistor, a tenth resistor, an eleventh resistor, a first sampling resistor, and a second sampling resistor. A ninth resistor is connected between the battery and the gate of the fifth FET. The battery is also connected to the source of the fifth FET. The drain of the fifth FET is connected to one end of the first inductor. The other end of the first inductor is connected to the positive terminal of the first diode. The negative terminal of the first diode is connected to the input terminal of the electrolytic circuit. The other end of the first inductor is also connected to the drain of the sixth FET. The source of the sixth FET is grounded. The gate of the sixth FET is connected to the controlled terminal of the DC-DC controller. The output terminal of the DC-DC controller is connected to the common point of the tenth and eleventh resistors. The other end of the tenth resistor is grounded. The other end of the eleventh resistor is connected to the input terminal of the electrolytic circuit. A first sampling resistor and a second sampling resistor are connected in parallel between the current detection terminal of the DC-DC controller and the current detection feedback terminal of the main control circuit.

7. The positive and negative electrode switching circuit for an electrode sheet according to claim 5, characterized in that, The control module includes a third transistor, a twelfth resistor, and a thirteenth resistor. The enable control terminal of the main control circuit is connected to one end of the thirteenth resistor, and the other end of the thirteenth resistor is connected to the base of the third transistor. The emitter of the third transistor is grounded, and the collector of the third transistor is connected to the input terminal of the DC-DC module via the twelfth resistor.

8. The positive and negative electrode switching circuit for an electrode sheet according to claim 1, characterized in that, The switching circuit includes: A start-stop module is used to start the water purification and disinfection machine to electrolyze water. The output terminal of the start-stop module is connected to the control signal input terminal of the main control circuit. A mode switching module is provided, which is used to switch the working mode of the purification and disinfection machine. The input terminal of the mode switching module is connected to the working mode output terminal of the main control circuit.

9. The positive and negative electrode switching circuit for an electrode sheet according to claim 8, characterized in that, The start / stop module has a button switch terminal and a fourteenth resistor. One end of the button switch terminal is connected to the fourteenth resistor, and the other end of the fourteenth resistor is connected to the control signal input terminal of the main control circuit. The mode switching module includes a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a fourth transistor, a fifth transistor, and a sixth transistor. The first operating mode output terminal of the main control circuit is connected to one end of the fifteenth resistor, and the other end of the fifteenth resistor is connected to the base of the fourth transistor. The emitter of the fourth transistor is grounded, and the collector of the fourth transistor is connected to the terminal of the push-button switch. The second operating mode output terminal of the main control circuit is connected to one end of the sixteenth resistor, and the other end of the sixteenth resistor is connected to the base of the fifth transistor. The emitter of the fifth transistor is grounded, and the collector of the fifth transistor is connected to the terminal of the push-button switch. The third operating mode output terminal of the main control circuit is connected to one end of the seventeenth resistor, and the other end of the seventeenth resistor is connected to the base of the sixth transistor. The emitter of the sixth transistor is grounded, and the collector of the sixth transistor is connected to the terminal of the push-button switch.

10. The positive and negative electrode switching circuit for an electrode sheet according to claim 1, characterized in that, It also includes a wireless charging circuit, which is used to wirelessly charge the battery. The DC power input terminal of the wireless charging circuit is connected to the DC power input terminal of the main control circuit, and the charging control terminal of the wireless charging circuit is connected to the charging control terminal of the main control circuit.

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