CN215986955U - Control circuit and air purifier - Google Patents
Control circuit and air purifier Download PDFInfo
- Publication number
- CN215986955U CN215986955U CN202122283283.3U CN202122283283U CN215986955U CN 215986955 U CN215986955 U CN 215986955U CN 202122283283 U CN202122283283 U CN 202122283283U CN 215986955 U CN215986955 U CN 215986955U
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- circuit
- control
- control circuit
- electrically connected
- fan
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- 238000004891 communication Methods 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 28
- 238000005868 electrolysis reaction Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Landscapes
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The utility model provides a control circuit and an air purifier, wherein the control circuit comprises a main control circuit, a power circuit and a fan control circuit, the power circuit supplies power to the main control circuit and the fan control circuit, and the fan control circuit is electrically connected with the main control circuit; the fan control circuit comprises a fan, the positive end of the fan is electrically connected with the power circuit through a diode, the positive end of the diode is electrically connected with the power circuit, and the negative end of the diode is electrically connected with the positive end of the fan. The control circuit of the utility model can inhibit reverse residual voltage generated by continuous rotation when the fan is powered off, simplify the structure and save the cost.
Description
Technical Field
The utility model relates to the technical field of air purifiers, in particular to a control circuit and an air purifier applying the control circuit.
Background
Among the air purifier of current class, thereby set up electrolysis circuit electrolysis sodium chloride solution and make sodium hypochlorite solution and disinfect to the air, simultaneously, still set up corresponding fan and carry out the operation of blowing, the flow of accelerator air current. However, when the fan in working state is powered off, the fan will rotate for a while and stop, and during this time, reverse residual voltage will be generated due to the rotation of the fan, which results in damage or abnormality of the front stage circuit.
In the existing method, the residual voltage is usually released by arranging a discharge circuit, but the discharge circuit is relatively complex and needs to occupy a larger circuit board size.
Therefore, it is necessary to design a more optimized circuit, simplify the structure, and save the cost.
Disclosure of Invention
The first purpose of the utility model is to provide a control circuit which can restrain reverse residual voltage generated by continuous rotation when a fan is powered off, simplify the structure and save the cost.
The second purpose of the utility model is to provide an air purifier which can restrain reverse residual voltage generated by continuous rotation when the fan is powered off, simplify the structure and save the cost.
In order to achieve the first object, the control circuit provided by the utility model comprises a main control circuit, a power circuit and a fan control circuit, wherein the power circuit provides power for the main control circuit and the fan control circuit; the fan control circuit comprises a fan, the positive end of the fan is electrically connected with the power circuit through a diode, the positive end of the diode is electrically connected with the power circuit, and the negative end of the diode is electrically connected with the positive end of the fan.
According to the scheme, the control circuit of the utility model has the advantages that the diodes are arranged at the positive electrode end of the fan and the power circuit, so that residual voltage cannot return to the preceding stage circuit, the damage of the preceding stage circuit is avoided, the residual voltage is restrained only by the diodes, the circuit structure is simple, and the cost is low.
In a further scheme, the control circuit is provided with an electrolysis circuit, and the electrolysis circuit comprises an electrolysis assembly, a first control switch and a second control switch; the control end of the first control switch and the control end of the second control switch are both electrically connected with the main control circuit, the first end of the electrolysis assembly is electrically connected with the first power supply end through the first control switch, and the second end of the electrolysis assembly is electrically connected with the second power supply end through the second control switch.
Therefore, the first end and the second end of the electrolytic component are respectively controlled by the electrolytic circuit of the control circuit through the first control switch and the second control switch, so that the safety of power on-off can be improved when the power supply of the electrolytic component is disconnected, and the risk of turn-off fault when a single switch is switched on and off is avoided.
In a further scheme, the control end of the first control switch and the control end of the second control switch are the same control end.
Therefore, the control end of the first control switch and the control end of the second control switch are the same, so that the first control switch and the second control switch can be switched simultaneously, and the structure setting is simplified.
In a further scheme, an MOS tube is further arranged between the second control switch and the second power supply end, the main control circuit is electrically connected with the control end of the MOS tube, the first end of the MOS tube is electrically connected with the second control switch, and the second end of the MOS tube is electrically connected with the second power supply end.
Therefore, by arranging the MOS tube, the PWM control signal can be sent to the MOS tube through the main control circuit, so that the effect of controlling the magnitude of the electrolytic current is achieved. The control of the electrolytic current does not need to frequently close and open the relay, and the relay is only opened under the condition of starting or closing the electrolytic function, thereby effectively prolonging the service life of the relay.
In a further scheme, the electrolytic circuit further comprises a current detection circuit, and the current detection circuit is used for detecting the current between the second end of the MOS tube and the second power supply end.
Therefore, the current detection circuit is arranged to detect the current of the electrolytic circuit, so that the adjustment and control of the electrolytic current can be facilitated.
In a further scheme, the control circuit further comprises a control panel communication interface circuit and a control panel circuit, and the control panel circuit is electrically connected with the main control circuit through the control panel communication interface circuit.
Therefore, the control panel circuit is electrically connected with the main control circuit through the control panel communication interface circuit, so that the control panel and the main circuit board of the control circuit can be conveniently and separately arranged, and the control panel can be conveniently installed according to the position requirement.
In a further scheme, the control panel communication interface circuit is a two-wire system communication circuit.
Therefore, the control panel controls more general keys, occupies more functional pins and needs more flat cables for connection. Through the control panel communication interface circuit who sets up the bilinear system, can be convenient for communicate with the control panel, the occupation of reducible pin to reduce the quantity of winding displacement. Meanwhile, the complexity of wiring can be reduced, and the cost is saved.
In a further scheme, the control panel circuit comprises a panel controller, a plurality of function keys and a function indicator light circuit, each function key and function indicator light circuit are electrically connected with the panel controller, and the panel controller is electrically connected with the main control circuit through a control panel communication interface circuit.
Therefore, the control panel circuit comprises the panel controller, a plurality of function keys and a function indicating lamp circuit, and function control and function indication can be conveniently carried out.
In a further scheme, the control circuit further comprises at least one of a liquid level detection circuit, a humidity sensor circuit and an electrostatic dust removal circuit, and the liquid level detection circuit, the humidity sensor circuit and the electrostatic dust removal circuit are electrically connected with the main control circuit.
Therefore, in order to facilitate the detection of the liquid level of the electrolytic solution, the liquid level detection circuit is arranged, so that the current liquid level condition can be conveniently and timely known. The humidity sensor circuit is arranged, so that the humidity detection of the space environment can be conveniently carried out. The electrostatic dust removal circuit is arranged, so that dust removal can be conveniently carried out on air, and floating dust particles in the air are reduced.
In order to achieve the second objective, the present invention provides an air purifier, which includes a housing and an air purifier control circuit, wherein the air purifier control circuit is disposed in the housing, and the air purifier control circuit employs the control circuit.
Drawings
Fig. 1 is a schematic block circuit diagram of an embodiment of the control circuit of the air purifier of the present invention.
Fig. 2 is a schematic diagram of a fan control circuit in an embodiment of an air purifier control circuit of the present invention.
FIG. 3 is a schematic diagram of an electrolytic circuit in an embodiment of the control circuit of the air purifier of the present invention.
Fig. 4 is a schematic diagram of a control panel communication interface circuit in an embodiment of an air purifier control circuit of the present invention.
The utility model is further explained with reference to the drawings and the embodiments.
Detailed Description
Air purifier control circuit embodiment:
as shown in fig. 1, in this embodiment, the air purifier control circuit includes a main control circuit 1, a power supply circuit 2, a fan control circuit 3, an electrolysis circuit 4, a control panel communication interface circuit 5, a control panel circuit 6, a liquid level detection circuit 7, a humidity sensor circuit 8, and an electrostatic dust removal circuit 9, the power supply circuit 2 supplies power to the main control circuit 1, the fan control circuit 3, the electrolysis circuit 4, the control panel communication interface circuit 5, the control panel circuit 6, the liquid level detection circuit 7, the humidity sensor circuit 8, and the electrostatic dust removal circuit 9, the fan control circuit 3, the electrolysis circuit 4, the liquid level detection circuit 7, the humidity sensor circuit 8, and the electrostatic dust removal circuit 9 are all electrically connected to the main control circuit 1, and the control panel circuit 6 is electrically connected to the main control circuit 1 through the control panel communication interface circuit 5.
Referring to fig. 2, in the present embodiment, the fan control circuit 3 includes a fan 31, a positive terminal of the fan 31 is electrically connected to the power supply circuit 2 through a diode D1, a positive terminal of a diode D1 is electrically connected to the power supply circuit 2, and a negative terminal of a diode D1 is electrically connected to the positive terminal of the fan. The fan control circuit 3 is electrically connected to the main control circuit 1 through a terminal VSP and a terminal FB, the terminal VSP is used for controlling the rotation speed of the fan 31, and the terminal FB is used for obtaining the rotation speed feedback of the fan 31 so as to regulate the speed of the fan 31. In addition, in order to ensure that no residual voltage exists in the fan control circuit 3, the restart may be continued after the fan 31 is stopped for a certain period of time.
Referring to fig. 3, the electrolysis circuit 4 includes an electrolysis assembly 41, a first control switch 42 and a second control switch 43. The electrolytic assembly 41 comprises two electrolytic electrodes, and the first end and the second end of the electrolytic assembly 41 are respectively connected with one electrode, which is well known to those skilled in the art and will not be described herein. The control end of the first control switch 42 and the control end of the second control switch 43 are both electrically connected to the main control circuit 1, the first end of the electrolysis component 41 is electrically connected to the first power end through the first control switch 42, and the second end of the electrolysis component 41 is electrically connected to the second power end through the second control switch 43. The first power supply terminal and the second power supply terminal have opposite polarities, and in this embodiment, the first power supply terminal is a positive terminal, and the second power supply terminal is a negative terminal. The control terminal of the first control switch 42 and the control terminal of the second control switch 43 may be independent control terminals, or may be controlled by the same control terminal, and preferably, the control terminal of the first control switch 42 and the control terminal of the second control switch 43 are the same control terminal. In the present embodiment, the first control switch 42 and the second control switch 43 are provided by the relay RY1, and the electromagnetic control terminal 44 of the relay RY1 controls the first control switch 42 and the second control switch 43 at the same time. The first end of the electromagnetic control end 44 is electrically connected with the power supply circuit 2, the second end of the electromagnetic control end 44 is electrically connected with the collector of the triode Q1, the emitter of the triode Q1 is grounded, and the base of the triode Q1 is electrically connected with the main control circuit 1 through a terminal DJ.
An MOS tube M is further arranged between the second control switch 43 and the second power supply end, the main control circuit 1 is electrically connected with the control end of the MOS tube M, the first end of the MOS tube is electrically connected with the second control switch 43, and the second end of the MOS tube M is electrically connected with the second power supply end. The type of the MOS transistor M is set according to the polarity of the second power supply end, in this embodiment, the MOS transistor M is an N-type MOS transistor, the drain of the MOS transistor M is electrically connected to the second control switch 43, the source of the MOS transistor M is electrically connected to the second power supply end, and the gate of the MOS transistor M is electrically connected to the main control circuit 1 through the terminal DJPWM. The main control circuit 1 sends a PWM control signal to the MOS transistor M, thereby controlling the electrolytic current of the electrolytic circuit 4.
As can be seen from fig. 3, the electrolysis circuit 4 further includes a current detection circuit 45, and the current detection circuit 45 is used for detecting the current between the second terminal of the MOS transistor M and the second power supply terminal. In this embodiment, the current detection circuit 45 is provided with a detection resistor R1, a first end of the detection resistor R1 is electrically connected to the second end of the MOS transistor M, and a second end of the detection resistor R1 is electrically connected to the second power supply terminal. The current detection circuit 45 is electrically connected to the main control circuit 1 through a terminal AD. The main control circuit 1 controls the duty ratio of the PWM control signal by obtaining the current collected by the current detection circuit 45, so as to adjust the electrolytic current.
Referring to fig. 4, the control panel communication interface circuit 5 is a two-wire system communication circuit, the control panel communication interface circuit 5 includes a communication interface 51, the communication interface 51 is electrically connected to the main control circuit 1 through a terminal RX and a terminal TX, and a communication interface 55 is used for connecting the control panel circuit 6, so that the control panel circuit 6 and the main control circuit 1 perform information interaction. The control panel circuit 6 comprises a panel controller, a plurality of function keys and a function indicating lamp circuit, each function key and function indicating lamp circuit is electrically connected with the panel controller, and the panel controller is electrically connected with the main control circuit 1 through a control panel communication interface circuit 5. In this embodiment, the function button includes the start button, the timing button, the wind speed adjustment key, hypochlorous acid disinfection key and child lock function key, function indicator lamp circuit is provided with the LED pilot lamp that corresponds with the function button, panel controller communicates with main control circuit 1 through predetermined communication protocol, the mode that makes control panel accessible double-line communication carries out function control, main control circuit 1 can instruct current function simultaneously, the occupation to main control circuit 1's pin when having reduced because the quantity of function button and pilot lamp is more, avoid the complexity of wiring simultaneously, be convenient for main control circuit 1 and control panel apart from far awayThe wiring is performed, the number of leads is reduced, and the cost is saved. In alternative embodiments, the control panel communication interface circuit 5 may also adopt I2And C, communication is carried out by the transmission mode of the bus.
In this embodiment, the liquid level detection circuit 7 is used to detect the liquid level of the electrolytic solution, a known liquid level detection circuit is used for the liquid level detection circuit 7, and in this embodiment, a liquid level detection sensor of the ADA01W type is used for the liquid level detection circuit 7. The humidity sensor circuit 8 is used for detecting the humidity of the environment and monitoring the humidity of the environment in real time, and the humidity sensor circuit 8 adopts a known humidity sensor, for example, a humidity sensor of an HTU31 model. The electrostatic precipitator circuit 9 is used for removing dust to the air, and in this embodiment, the electrostatic precipitator circuit 9 adopts an IFD dust removal module.
Air purifier embodiment:
in this embodiment, air purifier includes casing and air purifier control circuit, and air purifier control circuit sets up in the casing for control air purifier carries out air purification's operation. The air purifier control circuit applies the air purifier control circuit in the above-described embodiment.
As can be seen from the above, the air purifier control circuit according to the present invention has the advantages that the diode D1 is disposed between the positive electrode terminal of the fan 31 and the power supply circuit 2, so that the residual voltage cannot return to the preceding stage circuit, thereby avoiding damage to the preceding stage circuit, and the residual voltage is suppressed only by the diode D1, so that the circuit structure is simple, and the cost is low. Meanwhile, the first control switch 42 and the second control switch 43 are arranged to control the first end and the second end of the electrolysis assembly 41 respectively, so that the safety of power on-off can be improved when the power supply of the electrolysis assembly 41 is disconnected, and the risk of turn-off failure in the case of a single switch is avoided. In addition, through setting up control panel communication interface circuit 5, can be convenient for communicate with the control panel, the occupation of reducible pin, simultaneously, the complexity of reducible wiring practices thrift the cost.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (10)
1. A control circuit comprises a main control circuit, a power circuit and a fan control circuit, wherein the power circuit provides power for the main control circuit and the fan control circuit, and the fan control circuit is electrically connected with the main control circuit; it is characterized in that the preparation method is characterized in that,
the fan control circuit comprises a fan, the positive pole end of the fan is electrically connected with the power circuit through a diode, the positive pole end of the diode is electrically connected with the power circuit, and the negative pole of the diode is electrically connected with the positive pole end of the fan.
2. The control circuit of claim 1,
the control circuit is provided with an electrolysis circuit, and the electrolysis circuit comprises an electrolysis assembly, a first control switch and a second control switch;
the control end of the first control switch and the control end of the second control switch are both electrically connected with the main control circuit, the first end of the electrolysis assembly is electrically connected with the first power supply end through the first control switch, and the second end of the electrolysis assembly is electrically connected with the second power supply end through the second control switch.
3. The control circuit of claim 2,
the control end of the first control switch and the control end of the second control switch are the same control end.
4. The control circuit of claim 2,
an MOS tube is further arranged between the second control switch and the second power supply end, the main control circuit is electrically connected with the control end of the MOS tube, the first end of the MOS tube is electrically connected with the second control switch, and the second end of the MOS tube is electrically connected with the second power supply end.
5. The control circuit of claim 4,
the electrolytic circuit further comprises a current detection circuit, and the current detection circuit is used for detecting the current between the second end of the MOS tube and the second power supply end.
6. The control circuit according to any one of claims 1 to 5,
the control circuit further comprises a control panel communication interface circuit and a control panel circuit, and the control panel circuit is electrically connected with the main control circuit through the control panel communication interface circuit.
7. The control circuit of claim 6,
the control panel communication interface circuit is a two-wire system communication circuit.
8. The control circuit of claim 7,
the control panel circuit comprises a panel controller, a plurality of function keys and a function indicator light circuit, each function key and the function indicator light circuit are electrically connected with the panel controller, and the panel controller is electrically connected with the main control circuit through the control panel communication interface circuit.
9. The control circuit of claim 8,
the control circuit further comprises at least one of a liquid level detection circuit, a humidity sensor circuit and an electrostatic dust removal circuit, and the liquid level detection circuit, the humidity sensor circuit and the electrostatic dust removal circuit are all electrically connected with the main control circuit.
10. An air purifier comprises a shell and an air purifier control circuit, the air purifier control circuit is arranged in the shell, and is characterized in that,
the air purifier control circuit applies the control circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122283283.3U CN215986955U (en) | 2021-09-18 | 2021-09-18 | Control circuit and air purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122283283.3U CN215986955U (en) | 2021-09-18 | 2021-09-18 | Control circuit and air purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215986955U true CN215986955U (en) | 2022-03-08 |
Family
ID=80464023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122283283.3U Active CN215986955U (en) | 2021-09-18 | 2021-09-18 | Control circuit and air purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215986955U (en) |
-
2021
- 2021-09-18 CN CN202122283283.3U patent/CN215986955U/en active Active
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