CN216039857U - Electrolysis control circuit and disinfectant manufacturing device - Google Patents
Electrolysis control circuit and disinfectant manufacturing device Download PDFInfo
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- CN216039857U CN216039857U CN202023352083.0U CN202023352083U CN216039857U CN 216039857 U CN216039857 U CN 216039857U CN 202023352083 U CN202023352083 U CN 202023352083U CN 216039857 U CN216039857 U CN 216039857U
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- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 77
- 239000000645 desinfectant Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title abstract description 19
- 238000001514 detection method Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims 1
- 239000012266 salt solution Substances 0.000 abstract description 28
- 238000000034 method Methods 0.000 abstract description 13
- 150000003839 salts Chemical class 0.000 abstract description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 239000005708 Sodium hypochlorite Substances 0.000 description 6
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
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Abstract
The utility model discloses an electrolysis control circuit and a disinfectant manufacturing device, wherein the electrolysis control circuit comprises: the circuit comprises a first electrode, a second electrode, a first switch circuit and a comparison circuit. With this arrangement, in the present embodiment, when the comparison signal received by the control module is switched from the low level to the high level, the on-time of the first switch circuit is determined, and the on-time of the first switch circuit is the charging time required for charging the electrolytic component to the voltage of the reference signal. The longer the charging time is, the larger the capacitance is, namely the salt solution concentration is; shorter charging times indicate a lower capacitance, i.e., a lower salt solution concentration. Therefore, a user can add proper salt amount in the using process, the concentration of the salt solution is matched with the electrolysis voltage provided by the power supply, the disinfectant manufacturing device can electrolyze at proper electrolysis speed, and the electrolysis efficiency can be improved.
Description
Technical Field
The utility model relates to the technical field of household appliances, in particular to an electrolysis control circuit and a disinfectant manufacturing device.
Background
Along with the improvement of living standard of people, many intelligent electrical appliances have gone into people's life, and antiseptic solution manufacturing installation is the daily use of people. The working principle of the disinfectant manufacturing device is as follows: electrolyzing sodium chloride aqueous solution to generate sodium hypochlorite solution. Sodium hypochlorite is the main component of the disinfectant.
However, the existing disinfectant manufacturing device has a problem that, in the using process of a user, since the concentration of the saline solution added by the user cannot be detected, when the electrolysis voltage provided by the power supply is not changed, if the concentration of the saline solution is too large, the electrolysis current is too large, and the control circuit may be damaged; if the concentration of the salt solution is too low, the electrolytic current is small, so that the concentration of the generated sodium hypochlorite is insufficient, and the disinfection requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide an electrolysis control circuit and a disinfectant manufacturing apparatus, which are capable of detecting the concentration of a salt solution to which a salt has been added.
To achieve the above object, an embodiment of the present invention provides an electrolysis control circuit, including: a first electrode; the second electrode is arranged opposite to the first electrode at intervals, and the second electrode is grounded; the control end of the first switch circuit is used for inputting a first control signal, the first end of the first switch circuit is connected with a power supply, and the second end of the first switch circuit is connected with the first electrode; and a first input end of the comparison circuit is connected with the first electrode, a second input end of the comparison circuit is connected with the reference signal, and an output end of the comparison circuit outputs the comparison signal.
Optionally, the comparison circuit comprises: the non-inverting input end of the comparator is connected with the first electrode, and the inverting input end of the comparator is connected with a reference signal; the output end of the comparator outputs a comparison signal.
Optionally, the electrolysis control circuit further comprises: and the control end of the second switch circuit is used for inputting a second control signal, the first end of the second switch circuit is connected with the second electrode, and the second end of the second switch circuit is grounded.
Optionally, the electrolysis control circuit further comprises: a control end of the third switch circuit is used for inputting a third control signal, a first end of the third switch circuit is connected with the second electrode, and a second end of the third switch circuit is grounded through a first resistor; and the input end of the current detection circuit is connected with the second end of the third switch circuit through a second resistor, and the output end of the current detection circuit outputs a current detection signal.
Optionally, the third control signal is a PWM signal.
Optionally, the electrolysis control circuit further comprises: and one end of the filter capacitor is connected with the output end of the current detection circuit, and the second end of the filter capacitor is grounded.
Optionally, the third switch circuit is a MOS transistor.
Optionally, the electrolysis control circuit further comprises: and one end of the third resistor is connected with the control end of the MOS tube, and the other end of the third resistor is connected with the second end of the MOS tube.
Optionally, the electrolysis control circuit further comprises: and one end of the fourth resistor is connected with the control end of the third switch circuit, and the other end of the fourth resistor is used for receiving a third control signal.
Optionally, the electrolysis control circuit further comprises: and one end of the fifth resistor is connected with the power supply, and the other end of the fifth resistor is connected with the first end of the first switch circuit.
The embodiment of the utility model also provides a disinfectant manufacturing device, which comprises: an electrolysis control circuit as in any preceding embodiment.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
1. an embodiment of the present invention provides an electrolysis control circuit, including: a first electrode; the second electrode is arranged opposite to the first electrode at intervals, and the second electrode is grounded; the control end of the first switch circuit is used for inputting a first control signal, the first end of the first switch circuit is connected with a power supply, and the second end of the first switch circuit is connected with the first electrode; and a first input end of the comparison circuit is connected with the first electrode, a second input end of the comparison circuit is connected with the reference signal, and an output end of the comparison circuit outputs the comparison signal.
With this arrangement, in the present embodiment, when the comparison signal received by the control module is switched from the low level to the high level, the on-time of the first switch circuit is determined, and the on-time of the first switch circuit is the charging time required for charging the electrolytic component to the voltage of the reference signal. The longer the charging time is, the larger the capacitance is, namely the salt solution concentration is; shorter charging times indicate a lower capacitance, i.e., a lower salt solution concentration. Therefore, a user can add proper salt amount in the using process, the concentration of the salt solution is matched with the electrolysis voltage provided by the power supply, the disinfectant manufacturing device can electrolyze at proper electrolysis speed, and the electrolysis efficiency can be improved.
2. According to the embodiment of the utility model, the current detection circuit is arranged, so that the electrolytic current in the electrolytic process can be detected in real time, and when the electrolytic current is reduced by the first threshold value, the electrolytic solution is completely electrolyzed, so that the electrolysis control circuit is controlled to stop electrolysis. And when the electrolysis current exceeds a second threshold value, which indicates that the concentration of the salt solution is larger, the first switch circuit is controlled to be switched off to stop electrolysis, so that the overcurrent protection function is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for a worker of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a first embodiment of an electrolysis control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of an electrolysis control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third embodiment of an electrolysis control circuit according to an embodiment of the present invention.
Reference numerals:
a first resistor R1; a second resistor R2; a third resistor R3; a fourth resistor R4; a fifth resistor R5;
a first transistor Q1; a second transistor Q2; a MOS transistor Q3; a comparator U1; a reference signal V-REF;
a power supply VCC; and a filter capacitor C.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a worker skilled in the art without creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases by a worker of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Along with the improvement of living standard of people, many intelligent electrical appliances have gone into people's life, and antiseptic solution manufacturing installation is the daily use of people. The working principle of the disinfectant manufacturing device is as follows: electrolyzing sodium chloride aqueous solution to generate sodium hypochlorite solution. Sodium hypochlorite is the main component of the disinfectant. However, the existing disinfectant manufacturing device has a problem that, in the using process of a user, since the concentration of the saline solution added by the user cannot be detected, when the electrolysis voltage provided by the power supply is not changed, if the concentration of the saline solution is too large, the electrolysis current is too large, and the control circuit may be damaged; if the concentration of the salt solution is too low, the electrolytic current is small, so that the concentration of the generated sodium hypochlorite is insufficient, and the disinfection requirement cannot be met.
Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide an electrolysis control circuit and a disinfectant manufacturing apparatus, which are capable of detecting the concentration of a salt solution to which a salt has been added.
Example 1
As shown in fig. 1, an embodiment of the present invention provides an electrolysis control circuit including an electrolysis assembly, a first switching circuit, and a comparison circuit.
The electrolysis subassembly comprises first electrode and second electrode, and first electrode and second electrode interval set up relatively, and first switch circuit's control end is connected with control module's first output, first switch circuit's first end is connected with power supply VCC, and the second end is connected with first electrode, second electrode ground connection. The first input end of the comparison circuit is connected with the first electrode, the second input end of the comparison circuit is connected with the reference signal V-REF, the output end of the comparison circuit is suitable for being connected with the control module, and the comparison circuit outputs a comparison signal according to the voltage of the electrolytic component and the voltage output by the reference signal V-REF.
Because the first electrode and the second electrode of the electrolytic component are inserted into the electrolyte and correspond to a capacitor, before the electrolysis starts, the first switch circuit is controlled to be conducted by outputting the first control signal, so that the electrolytic component starts to be charged. At the same time, the on-time of the first switch circuit is timed.
In the embodiment of the utility model, the comparison circuit comprises a comparator U1, wherein the non-inverting input end of the comparator U1 is connected with the first electrode, and the inverting input end of the comparator U1 is connected with a reference signal V-REF; the output of the comparator U1 outputs a comparison signal. Therefore, in the process of charging the electrolytic component, when the voltage at two ends of the electrolytic component is lower than the voltage output by the reference signal V-REF, the comparison signal output by the comparison circuit is at a low level; when the voltage at the two ends of the electrolytic component is higher than the voltage output by the reference signal V-REF, the comparison signal output by the comparison circuit is at a high level. And when the acquired comparison signal is switched from low level to high level, namely the comparison signal is changed, stopping timing, and determining the conduction time of the first switch circuit, wherein the conduction time of the first switch circuit is the charging time required by the electrolytic component to be charged to the voltage output by the reference signal V-REF.
According to a large amount of experimental data, the longer the charging time is, the larger the capacitance is, namely the salt solution concentration is; shorter charging times indicate a lower capacitance, i.e., a lower salt solution concentration. Therefore, a user can add proper salt amount in the using process, the concentration of the salt solution is matched with the electrolytic voltage provided by the power supply VCC, the disinfectant manufacturing device can electrolyze at proper electrolytic speed, and the electrolytic efficiency can be improved.
The first switch circuit may be the first transistor Q1, and those skilled in the art may set the first switch circuit as another type of switch tube, such as the MOS transistor Q3, according to the actual situation. The present embodiment is merely illustrative, not restrictive, and may perform the same function.
Of course, in this embodiment, the non-inverting input of the comparator U1 may be connected to the reference signal V-REF, and the inverting input may be connected to the first electrode. The present embodiment is merely an example, and not a limitation, and a person skilled in the art may change the signals input by the two input terminals of the comparator U1 according to practical situations, so as to achieve the same technical effect.
Optionally, in some embodiments of the present invention, the electrolysis control circuit may further include a second switch circuit, a control terminal of the second switch circuit is used for inputting a second control signal, a first terminal of the second switch circuit is connected to the second electrode, and a second terminal of the second switch circuit is grounded.
As shown in fig. 2, the second control circuit may function to control the electrolytic assembly to start charging and stop charging. The second switch circuit may be a second transistor Q2, and when the first switch circuit is turned on, the output second control signal is at a high level, so that the second switch circuit is turned on, and the electrolytic component starts to charge. When the comparison signal output by the comparator U1 changes, the on-time of the first switch circuit can be determined, and then the second switch circuit can be controlled to be switched off, so that the electrolytic component can not be charged any more.
Optionally, in some embodiments of the present invention, as shown in fig. 3, the electrolysis control circuit may further include: a third switch circuit and a current detection circuit.
The control end of the third switch circuit is used for inputting a third control signal, the first end of the third switch circuit is connected with the second electrode, and the second end of the second switch circuit is grounded through a first resistor R1. The input end of the current detection circuit is connected with the second end of the third switch circuit through a second resistor R2, and the output end of the current detection circuit outputs a current detection signal. The third switching circuit may be a MOS transistor Q3. The third control signal may be a pwm signal.
At the start of electrolysis, the first switch circuit is turned on, so the electrolysis current generated at the time of electrolysis can be adjusted by adjusting the duty ratio of the pwm signal. Specifically, due to the different salt solution concentrations, the electrolysis currents generated during the electrolysis process will be different under the same electrolysis voltage provided by the power supply VCC. Namely, the larger the concentration of the salt solution is, the larger the generated electrolytic current is, and in order to ensure that the electrolytic current is within the normal electrolysis numerical range, the switching frequency of the first switching circuit needs to be controlled and reduced, namely, the duty ratio of the pwm signal is reduced; otherwise, the duty cycle of the pwm signal needs to be increased. Therefore, the salt amount added by a user is matched with the electrolytic current in the using process, so that the disinfectant manufacturing device can electrolyze at a proper electrolytic speed, and the electrolytic efficiency can be improved.
During electrolysis, the salt solution concentration can be detected at intervals, and then the duty ratio of PWM is adjusted according to the salt solution concentration. For example, the electrolysis process may be performed for a total of 5 minutes, and the salt solution concentration may be measured every 1 minute.
Specifically, the relationship between the charging time and the salt solution concentration, the electrolysis time, and the pwm duty cycle is as follows:
| concentration of salt solution | Charging time | Time of electrolysis | PWM duty cycle |
| 1g/500ml | 0.7us | 15min | 80％ |
| 2g/500ml | 0.77us | 13min | 70％ |
| 3g/500ml | 0.9us | 10min | 60％ |
| 4g/500ml | 1.2us | 8min | 50％ |
The table is merely illustrative and not restrictive, and those skilled in the art can adjust the parameters of the charging time, the salt solution concentration, the electrolysis time and the pwm duty ratio according to actual conditions, so as to achieve the same technical effect.
Of course, those skilled in the art can change the types of the third switch circuit and the third control signal according to actual situations, and this embodiment is merely an example, and is not limited thereto, and the same technical effects can be achieved.
As another embodiment, the electrolysis time may be adjusted at a constant duty cycle of the pwm signal depending on the concentration of the salt solution. Namely, the higher the concentration of the salt solution is, the higher the generated electrolysis current is, the electrolysis time needs to be reduced, namely, the duty ratio of the pwm signal is reduced; on the contrary, the electrolysis time is increased.
The current detection circuit is used for detecting the electrolysis current in the electrolysis process in real time, and when the electrolysis current is reduced by a first threshold value, the electrolysis current indicates that the electrolysis is completed, so that the electrolysis control circuit is controlled to stop the electrolysis. And when the electrolysis current exceeds a second threshold value, which indicates that the concentration of the salt solution is large, a low level is output through the first control signal, the first switch circuit is controlled to be switched off, electrolysis is stopped, and therefore the overcurrent protection effect is achieved.
Optionally, in an embodiment of the present invention, the electrolysis control circuit further includes: a fifth resistor R5, a fourth resistor R4, a third resistor R3 and a filter capacitor C.
One end of a fifth resistor R5 is connected with the power supply VCC, and the other end is connected with the first end of the first switch circuit. One end of the fourth resistor R4 is connected to the control end of the third switch circuit, and the other end is used for receiving a third control signal. One end of the third resistor R3 is connected to the control end of the MOS transistor Q3, and the other end is connected to the second end of the MOS transistor Q3. One end of the filter capacitor C is connected with the output end of the current detection circuit, and the second end of the filter capacitor C is grounded.
Example 2
The embodiment of the utility model also provides a disinfectant manufacturing device which comprises the electrolysis control circuit in any one of the embodiments.
In the process of charging the electrolytic component, when the voltage at two ends of the electrolytic component is lower than the voltage output by the reference signal V-REF, the comparison signal output by the comparison circuit is at a low level; when the voltage at the two ends of the electrolytic component is higher than the voltage output by the reference signal V-REF, the comparison signal output by the comparison circuit is at a high level. And when the acquired comparison signal is switched from low level to high level, namely the comparison signal is changed, stopping timing, and determining the conduction time of the first switch circuit, wherein the conduction time of the first switch circuit is the charging time required by the electrolytic component to be charged to the voltage output by the reference signal V-REF.
According to a large amount of experimental data, the longer the charging time is, the larger the capacitance is, namely the salt solution concentration is; shorter charging times indicate a lower capacitance, i.e., a lower salt solution concentration. Therefore, a user can add proper salt amount in the using process, the concentration of the salt solution is matched with the electrolytic voltage provided by the power supply VCC, the disinfectant manufacturing device can electrolyze at proper electrolytic speed, and the electrolytic efficiency can be improved.
Claims (11)
1. An electrolysis control circuit, comprising:
a first electrode;
the second electrode is arranged opposite to the first electrode at intervals, and the second electrode is grounded;
a control end of the first switch circuit is used for inputting a first control signal, a first end of the first switch circuit is connected with a power supply (VCC), and a second end of the first switch circuit is connected with the first electrode;
and a comparison circuit, wherein a first input end of the comparison circuit is connected with the first electrode, a second input end of the comparison circuit is connected with a reference signal (V-REF), and an output end of the comparison circuit outputs a comparison signal.
2. The electrolysis control circuit of claim 1, wherein the comparison circuit comprises:
a comparator (U1) having a non-inverting input connected to the first electrode and an inverting input connected to a reference signal (V-REF); the output end of the comparator (U1) outputs a comparison signal.
3. The electrolysis control circuit according to claim 1 or 2, further comprising:
and the control end of the second switch circuit is used for inputting a second control signal, the first end of the second switch circuit is connected with the second electrode, and the second end of the second switch circuit is grounded.
4. The electrolysis control circuit according to claim 1 or 2, further comprising:
a third switch circuit, a control terminal of which is used for inputting a third control signal, a first terminal of which is connected with the second electrode, and a second terminal of which is grounded through a first resistor (R1);
and the input end of the current detection circuit is connected with the second end of the third switch circuit through a second resistor (R2), and the output end of the current detection circuit outputs a current detection signal.
5. The electrolysis control circuit of claim 4, wherein the third control signal is a PWM signal.
6. The electrolysis control circuit of claim 4, further comprising:
and one end of the filter capacitor (C) is connected with the output end of the current detection circuit, and the second end of the filter capacitor (C) is grounded.
7. The electrolysis control circuit according to claim 6, wherein the third switching circuit is a MOS transistor (Q3).
8. The electrolysis control circuit of claim 7, further comprising:
and one end of the third resistor (R3) is connected with the control end of the MOS transistor (Q3), and the other end of the third resistor is connected with the second end of the MOS transistor (Q3).
9. The electrolysis control circuit of claim 8, further comprising:
and a fourth resistor (R4) having one end connected to the control end of the third switch circuit and the other end for receiving a third control signal.
10. The electrolysis control circuit according to any one of claims 5-9, further comprising:
and one end of a fifth resistor (R5) is connected with the power supply (VCC), and the other end of the fifth resistor is connected with the first end of the first switch circuit.
11. A disinfectant liquid producing apparatus, comprising: the electrolysis control circuit of any one of claims 1 to 10.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112725833A (en) * | 2020-12-31 | 2021-04-30 | 珠海格力电器股份有限公司 | Electrolysis control circuit, control method and disinfectant manufacturing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725833A (en) * | 2020-12-31 | 2021-04-30 | 珠海格力电器股份有限公司 | Electrolysis control circuit, control method and disinfectant manufacturing device |
| CN112725833B (en) * | 2020-12-31 | 2023-10-24 | 珠海格力电器股份有限公司 | Electrolytic control circuit, control method and disinfectant manufacturing device |
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