Electrolysis circuit with exchange electrode

Abstract

The invention discloses an electrolysis circuit with an exchange electrode, which belongs to the technical field of electrolysis water production and comprises a switching power supply, a constant current source module, an MCU (Microprogrammed Control Unit), a first electrode, a second electrode and an electrode switching module, the output end of the switching power supply is electrically connected with the input end of the constant current source module; the electrode switching module comprises a relay assembly, the reverse pole control output end of the MCU is electrically connected with the output end of the switching power supply through a coil of the relay assembly, and the positive pole output end and the negative pole output end of the constant current source module are electrically connected with a first electrode through a normally-closed contact and a normally-open contact of a first contact set respectively. The negative electrode output end and the positive electrode output end of the constant current source module are electrically connected with the second electrode through a normally-closed contact and a normally-open contact of the second contact set respectively. The electrolytic circuit with the exchange electrode solves the problem that scale is formed due to the fact that a single electrode uses direct current with the same polarity for a long time.

Description

Technical Field

[0001] This invention relates to the field of water electrolysis technology, and in particular to a constant current electrolysis circuit with an exchange electrode. Background Technology

[0002] In existing technologies, electrolyzed water is generally obtained by applying a specified DC voltage between the electrodes of an electrolyzer to electrolyze the raw water supplied in the electrolyzer, thereby continuously and variably controlling the pH value of the electrolyzed water and forming a DC voltage power supply.

[0003] In existing electrolysis circuits, the polarities of the two electrodes used for electrolysis cannot be exchanged. Over time, scale will form on the electrodes, thus affecting the subsequent electrolysis process. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, the present invention provides a constant current electrolysis circuit with switching electrodes to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an electrolysis circuit with switching electrodes, including a switching power supply, a constant current source module, an MCU, a first electrode, a second electrode, and an electrode switching module; the output terminal VCC of the switching power supply is electrically connected to the input terminal of the constant current source module; The electrode switching module includes a relay assembly. The reverse polarity control output terminal RLY of the MCU is electrically connected to the output terminal VCC of the switching power supply through the coil of the relay assembly. The positive output terminal VO+ and the negative output terminal VO- of the constant current source module are electrically connected to the first electrode through the normally closed contact and normally open contact of the first contact group, respectively. The negative output terminal VO- and the positive output terminal VO+ of the constant current source module are electrically connected to the second electrode through the normally closed contact and normally open contact of the second contact group, respectively.

[0006] Preferably, the relay assembly includes a first relay JK1, one end of the coil of the first relay JK1 is electrically connected to the reverse polarity control output terminal of the MCU, and the other end of the coil of the first relay JK1 is electrically connected to the input terminal VCC of the constant current source module. The first contact group includes a first normally closed contact, a first normally open contact, and a first common terminal. The first normally closed contact of the first relay JK1 is electrically connected to the positive output terminal VO+ of the constant current source module. The first normally open contact of the first relay JK1 is electrically connected to the negative output terminal VO- of the constant current source module. The first common terminal of the first relay JK1 is electrically connected to the first electrode. The second contact group includes a second normally closed contact, a second normally open contact, and a second common terminal. The second normally closed contact of the first relay JK1 is electrically connected to the negative output terminal VO- of the constant current source module. The second normally open contact of the first relay JK1 is electrically connected to the positive output terminal VO+ of the constant current source module. The second common terminal of the first relay JK1 is electrically connected to the second electrode.

[0007] Optionally, the relay assembly includes a second relay JK2 and a third relay JK3. The coils of the second relay JK2 and the third relay JK3 are connected in series, with one end electrically connected to the inverted control output terminal of the MCU and the other end electrically connected to the input terminal VCC of the constant current source module. The first contact group includes a normally closed contact, a normally open contact, and a common terminal of the second relay JK2. The normally closed contact of the second relay JK2 is electrically connected to the positive output terminal VO+ of the constant current source module, and the normally open contact of the second relay JK2 is electrically connected to the negative output terminal VO- of the constant current source module. The common terminal of the first relay JK1 is electrically connected to the first electrode. The second contact group includes a normally closed contact, a normally open contact, and a common terminal of the third relay JK3. The normally closed contact of the third relay JK3 is electrically connected to the negative output terminal VO- of the constant current source module, the normally open contact of the third relay JK3 is electrically connected to the positive output terminal VO+ of the constant current source module, and the common terminal of the third relay JK3 is electrically connected to the second electrode.

[0008] Specifically, the constant current source module includes a controllable constant current chip U2. The output terminal VCC of the switching power supply is electrically connected to the power input terminal VIN of the controllable constant current chip U2 and the first terminal of the sampling resistor, respectively. The second terminal of the sampling resistor is electrically connected to the current detection terminal CSN of the controllable constant current chip U2 and the first terminal of the capacitor C7, respectively. The drive output terminal DRV of the controllable constant current chip U2 is electrically connected to the gate of the field-effect transistor MOS1. The source of the field-effect transistor MOS1 is grounded. The drain of the field-effect transistor MOS1 is electrically connected to the first terminal of the inductor L1 and the anode of the diode D1. The second terminal of the inductor L1 is electrically connected to the second terminal of the capacitor C7. The cathode of the diode D1 is electrically connected to the output terminal VCC of the switching power supply. The first terminal of capacitor C7 serves as the positive output terminal VO+ of the constant current source module, and the second terminal of capacitor C7 serves as the negative output terminal VO- of the constant current source module.

[0009] It is worth noting that the constant current source module also includes capacitor EC2 and capacitor C5. The first end of capacitor EC2 and the first end of capacitor C5 are both connected to the output terminal VCC of the switching power supply, and the second end of capacitor EC2 and the second end of capacitor C5 are grounded.

[0010] Preferably, a current sampling resistor R15 is provided between the first electrode and the first contact group, and the two ends of the current sampling resistor R15 are electrically connected to the current acquisition input terminal AN_OUT of the MCU through a current detection module. The power adjustment signal output terminal ladj_PWM of the MCU is electrically connected to the control input terminal DIM of the controllable constant current chip U2.

[0011] Optionally, the current detection module includes a bidirectional current detection chip U1. The acquisition terminal IN+ of the bidirectional current detection chip U1 is electrically connected to the first terminal of the current sampling resistor R15, the acquisition terminal IN- of the bidirectional current detection chip U1 is electrically connected to the second terminal of the current sampling resistor R15, and the feedback terminal OUT of the bidirectional current detection chip U1 is electrically connected to the current acquisition input terminal AN_OUT of the MCU.

[0012] Specifically, the electrode switching module further includes an NPN transistor Q1, the base (B) of which is electrically connected to the reverse polarity control output terminal RLY of the MCU, the emitter (E) of which is grounded, and the collector (C) of which is electrically connected to the output terminal VCC of the switching power supply through the coil of the relay assembly.

[0013] The beneficial effects of this invention are as follows: In the electrolysis circuit with switching electrodes, the first and second electrodes are placed in the electrolytic cell, and electrolysis is achieved by passing direct current of different polarities to the first and second electrodes. After a period of use, the relay coil is turned on by outputting a signal through the reverse polarity control output terminal RLY of the MCU. Both the first and second contact groups are activated, causing the corresponding normally closed contacts to open and the corresponding normally open contacts to close, thereby switching the polarities of the first and second electrodes. This avoids the problem of scale formation caused by a single electrode using direct current of the same polarity for a long time. Attached Figure Description

[0014] Figure 1 This is a system block diagram of a constant current electrolysis circuit with switching electrodes in one embodiment of the present invention; Figure 2 This is a constant current electrolysis circuit diagram with switching electrodes in one embodiment of the present invention; Figure 3 This is a constant current electrolysis circuit diagram with switching electrodes in another embodiment of the present invention; Figure 4This is a circuit diagram of a constant current source module in one embodiment of the present invention. Detailed Implementation

[0015] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] like Figure 1-4 As shown, an electrolysis circuit with switching electrodes includes a switching power supply, a constant current source module, an MCU, a first electrode, a second electrode, and an electrode switching module; the output terminal VCC of the switching power supply is electrically connected to the input terminal of the constant current source module. The electrode switching module includes a relay assembly. The reverse polarity control output terminal RLY of the MCU is electrically connected to the output terminal VCC of the switching power supply through the coil of the relay assembly. The positive output terminal VO+ and the negative output terminal VO- of the constant current source module are electrically connected to the first electrode through the normally closed contact and normally open contact of the first contact group, respectively. The negative output terminal VO- and the positive output terminal VO+ of the constant current source module are electrically connected to the second electrode through the normally closed contact and normally open contact of the second contact group, respectively.

[0017] In the electrolysis circuit with switching electrodes, the first and second electrodes are placed in the electrolytic cell, and electrolysis is achieved by passing direct current of different polarities through the first and second electrodes. After a period of use, the relay coil is activated by outputting a signal through the reverse polarity control output terminal RLY of the MCU. Both the first and second contact groups are activated, causing the corresponding normally closed contacts to open and the corresponding normally open contacts to close, thereby switching the polarities of the first and second electrodes. This avoids the problem of scale formation caused by a single electrode using direct current of the same polarity for a long time.

[0018] Preferably, the relay assembly includes a first relay JK1, one end of the coil of the first relay JK1 is electrically connected to the reverse polarity control output terminal of the MCU, and the other end of the coil of the first relay JK1 is electrically connected to the input terminal VCC of the constant current source module. The first contact group includes a first normally closed contact, a first normally open contact, and a first common terminal. The first normally closed contact of the first relay JK1 is electrically connected to the positive output terminal VO+ of the constant current source module. The first normally open contact of the first relay JK1 is electrically connected to the negative output terminal VO- of the constant current source module. The first common terminal of the first relay JK1 is electrically connected to the first electrode. The second contact group includes a second normally closed contact, a second normally open contact, and a second common terminal. The second normally closed contact of the first relay JK1 is electrically connected to the negative output terminal VO- of the constant current source module. The second normally open contact of the first relay JK1 is electrically connected to the positive output terminal VO+ of the constant current source module. The second common terminal of the first relay JK1 is electrically connected to the second electrode.

[0019] In this embodiment, when the coil of the first relay JK1 is not energized, the first electrode is connected to the positive output terminal VO+ of the constant current source module, and the second electrode is connected to the negative output terminal VO- of the constant current source module; when the coil of the first relay JK1 is energized, the first electrode is connected to the negative output terminal VO- of the constant current source module, and the second electrode is connected to the positive output terminal VO+ of the constant current source module, thereby realizing the electrical exchange of the electrodes.

[0020] Optionally, the relay assembly includes a second relay JK2 and a third relay JK3. The coils of the second relay JK2 and the third relay JK3 are connected in series, with one end electrically connected to the inverted control output terminal of the MCU and the other end electrically connected to the input terminal VCC of the constant current source module. The first contact group includes a normally closed contact, a normally open contact, and a common terminal of the second relay JK2. The normally closed contact of the second relay JK2 is electrically connected to the positive output terminal VO+ of the constant current source module, and the normally open contact of the second relay JK2 is electrically connected to the negative output terminal VO- of the constant current source module. The common terminal of the first relay JK1 is electrically connected to the first electrode. The second contact group includes a normally closed contact, a normally open contact, and a common terminal of the third relay JK3. The normally closed contact of the third relay JK3 is electrically connected to the negative output terminal VO- of the constant current source module, the normally open contact of the third relay JK3 is electrically connected to the positive output terminal VO+ of the constant current source module, and the common terminal of the third relay JK3 is electrically connected to the second electrode.

[0021] In this embodiment, when the coils of the second relay JK2 and the third relay JK3 are not energized, the first electrode is connected to the positive output terminal VO+ of the constant current source module, and the second electrode is connected to the negative output terminal VO- of the constant current source module; when the coils of the second relay JK2 and the third relay JK3 are energized, the first electrode is connected to the negative output terminal VO- of the constant current source module, and the second electrode is connected to the positive output terminal VO+ of the constant current source module, thereby realizing the electrical exchange of the electrodes.

[0022] Specifically, the constant current source module includes a controllable constant current chip U2. The output terminal VCC of the switching power supply is electrically connected to the power input terminal VIN of the controllable constant current chip U2 and the first terminal of the sampling resistor, respectively. The second terminal of the sampling resistor is electrically connected to the current detection terminal CSN of the controllable constant current chip U2 and the first terminal of the capacitor C7, respectively. The drive output terminal DRV of the controllable constant current chip U2 is electrically connected to the gate of the field-effect transistor MOS1. The source of the field-effect transistor MOS1 is grounded. The drain of the field-effect transistor MOS1 is electrically connected to the first terminal of the inductor L1 and the anode of the diode D1. The second terminal of the inductor L1 is electrically connected to the second terminal of the capacitor C7. The cathode of the diode D1 is electrically connected to the output terminal VCC of the switching power supply. The first terminal of capacitor C7 serves as the positive output terminal VO+ of the constant current source module, and the second terminal of capacitor C7 serves as the negative output terminal VO- of the constant current source module.

[0023] In this embodiment, the sampling resistor is formed by resistors R17, R2, and R5 connected in parallel. The output terminal VCC of the switching power supply, after passing through the sampling resistor, serves as the positive output terminal VO of the constant current source module, and flows back to the negative output terminal VO- of the constant current source module through the electrolytic load. The drive output terminal DRV of the controllable constant current chip U2 outputs a high-frequency switching signal. The field-effect transistor MOS1, inductor L1, and diode D1 form the switching constant current component.

[0024] It is worth noting that the constant current source module also includes capacitors EC2 and C5. The first terminals of both capacitor EC2 and C5 are connected to the output terminal VCC of the switching power supply, and the second terminals of both capacitors EC2 and C5 are grounded. The output terminal VCC of the switching power supply is filtered by capacitors EC2 and C5.

[0025] Preferably, a current sampling resistor R15 is provided between the first electrode and the first contact group, and the two ends of the current sampling resistor R15 are electrically connected to the current acquisition input terminal AN_OUT of the MCU through a current detection module. The power adjustment signal output terminal ladj_PWM of the MCU is electrically connected to the control input terminal DIM of the controllable constant current chip U2.

[0026] The current detection module, together with resistor R15, is used to detect the real-time current of the electrolysis reaction and feeds it back to the current acquisition input terminal AN_OUT of the MCU. When the real-time current of the electrolysis reaction deviates from the set value, the MCU adjusts the power through the power adjustment signal output terminal Iadj_PWM port and outputs it to the controllable constant current chip U2, thereby forming a closed-loop control.

[0027] Specifically, the current detection module includes a bidirectional current detection chip U1. The acquisition terminal IN+ of the bidirectional current detection chip U1 is electrically connected to the first terminal of the current sampling resistor R15, the acquisition terminal IN- of the bidirectional current detection chip U1 is electrically connected to the second terminal of the current sampling resistor R15, and the feedback terminal OUT of the bidirectional current detection chip U1 is electrically connected to the current acquisition input terminal AN_OUT of the MCU.

[0028] The bidirectional current sensing chip U1 is a dedicated integrated circuit capable of simultaneously measuring the magnitude and direction of current. Thus, through the cooperation of the bidirectional current sensing chip U1 and resistor R15, the current magnitude before and after electrode switching can be detected and fed back to the MCU.

[0029] Preferably, the electrode switching module further includes an NPN transistor Q1, the base (B) of the NPN transistor Q1 is electrically connected to the reverse polarity control output terminal RLY of the MCU, the emitter (E) of the NPN transistor Q1 is grounded, and the collector (C) of the NPN transistor Q1 is electrically connected to the output terminal VCC of the switching power supply through the coil of the relay assembly.

[0030] By outputting a high level through the MCU's inverted control output terminal RLY, the collector (C) and emitter (E) of the NPN transistor Q1 can be connected, thereby energizing the coil of the relay assembly and controlling the opening and closing of the first and second contact groups of the relay assembly.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. An electrolytic circuit with switching electrodes, characterized in that: It includes a switching power supply, a constant current source module, an MCU, a first electrode, a second electrode, and an electrode switching module; the output terminal VCC of the switching power supply is electrically connected to the input terminal of the constant current source module. The electrode switching module includes a relay assembly. The reverse polarity control output terminal RLY of the MCU is electrically connected to the output terminal VCC of the switching power supply through the coil of the relay assembly. The positive output terminal VO+ and the negative output terminal VO- of the constant current source module are electrically connected to the first electrode through the normally closed contact and normally open contact of the first contact group, respectively. The negative output terminal VO- and the positive output terminal VO+ of the constant current source module are electrically connected to the second electrode through the normally closed contact and normally open contact of the second contact group, respectively.

2. The electrolytic circuit with switching electrodes according to claim 1, characterized in that: The relay assembly includes a first relay JK1, one end of the coil of the first relay JK1 is electrically connected to the reverse polarity control output terminal of the MCU, and the other end of the coil of the first relay JK1 is electrically connected to the input terminal VCC of the constant current source module. The first contact group includes a first normally closed contact, a first normally open contact, and a first common terminal. The first normally closed contact of the first relay JK1 is electrically connected to the positive output terminal VO+ of the constant current source module. The first normally open contact of the first relay JK1 is electrically connected to the negative output terminal VO- of the constant current source module. The first common terminal of the first relay JK1 is electrically connected to the first electrode. The second contact group includes a second normally closed contact, a second normally open contact, and a second common terminal. The second normally closed contact of the first relay JK1 is electrically connected to the negative output terminal VO- of the constant current source module. The second normally open contact of the first relay JK1 is electrically connected to the positive output terminal VO+ of the constant current source module. The second common terminal of the first relay JK1 is electrically connected to the second electrode.

3. The electrolytic circuit with switching electrodes according to claim 2, characterized in that: The relay assembly includes a second relay JK2 and a third relay JK3. The coils of the second relay JK2 and the third relay JK3 are connected in series, with one end electrically connected to the inverted control output terminal of the MCU and the other end electrically connected to the input terminal VCC of the constant current source module. The first contact group includes a normally closed contact, a normally open contact, and a common terminal of the second relay JK2. The normally closed contact of the second relay JK2 is electrically connected to the positive output terminal VO+ of the constant current source module, and the normally open contact of the second relay JK2 is electrically connected to the negative output terminal VO- of the constant current source module. The common terminal of the first relay JK1 is electrically connected to the first electrode. The second contact group includes a normally closed contact, a normally open contact, and a common terminal of the third relay JK3. The normally closed contact of the third relay JK3 is electrically connected to the negative output terminal VO- of the constant current source module, the normally open contact of the third relay JK3 is electrically connected to the positive output terminal VO+ of the constant current source module, and the common terminal of the third relay JK3 is electrically connected to the second electrode.

4. The electrolytic circuit with switching electrodes according to claim 1, characterized in that: The constant current source module includes a controllable constant current chip U2. The output terminal VCC of the switching power supply is electrically connected to the power input terminal VIN of the controllable constant current chip U2 and the first terminal of the sampling resistor, respectively. The second terminal of the sampling resistor is electrically connected to the current detection terminal CSN of the controllable constant current chip U2 and the first terminal of the capacitor C7, respectively. The drive output terminal DRV of the controllable constant current chip U2 is electrically connected to the gate of the field-effect transistor MOS1. The source of the field-effect transistor MOS1 is grounded. The drain of the field-effect transistor MOS1 is electrically connected to the first terminal of the inductor L1 and the anode of the diode D1. The second terminal of the inductor L1 is electrically connected to the second terminal of the capacitor C7. The cathode of the diode D1 is electrically connected to the output terminal VCC of the switching power supply. The first terminal of capacitor C7 serves as the positive output terminal VO+ of the constant current source module, and the second terminal of capacitor C7 serves as the negative output terminal VO- of the constant current source module.

5. An electrolytic circuit with an exchange electrode according to claim 4, characterized in that: The constant current source module also includes capacitor EC2 and capacitor C5. The first end of capacitor EC2 and the first end of capacitor C5 are both connected to the output terminal VCC of the switching power supply. The second end of capacitor EC2 and the second end of capacitor C5 are grounded.

6. An electrolytic circuit with an exchange electrode according to claim 4, characterized in that: A current sampling resistor R15 is provided between the first electrode and the first contact group. The two ends of the current sampling resistor R15 are electrically connected to the current acquisition input terminal AN_OUT of the MCU through the current detection module. The power adjustment signal output terminal ladj_PWM of the MCU is electrically connected to the control input terminal DIM of the controllable constant current chip U2.

7. An electrolytic circuit with an exchange electrode according to claim 6, characterized in that: The current detection module includes a bidirectional current detection chip U1. The acquisition terminal IN+ of the bidirectional current detection chip U1 is electrically connected to the first terminal of the current sampling resistor R15, the acquisition terminal IN- of the bidirectional current detection chip U1 is electrically connected to the second terminal of the current sampling resistor R15, and the feedback terminal OUT of the bidirectional current detection chip U1 is electrically connected to the current acquisition input terminal AN_OUT of the MCU.

8. An electrolytic circuit with an exchange electrode according to claim 1, characterized in that: The electrode switching module also includes an NPN transistor Q1. The base (B) of the NPN transistor Q1 is electrically connected to the reverse polarity control output terminal RLY of the MCU. The emitter (E) of the NPN transistor Q1 is grounded. The collector (C) of the NPN transistor Q1 is electrically connected to the output terminal VCC of the switching power supply through the coil of the relay assembly.

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