Air purifier control system

Abstract

The utility model relates to the technical field of air purifiers, in particular to an air purifier control system which comprises a main control circuit, a power circuit, a warning circuit, a driving circuit and a wireless circuit. The power supply circuit, the warning circuit, the driving circuit and the wireless circuit are electrically connected with the main control circuit respectively; the power supply circuit comprises a first power supply input port, a second power supply input port, a PWM pulse width modulation module, a first power supply output module, a second power supply output module and a third power supply output module. By arranging the main control circuit, the power supply circuit, the warning circuit, the driving circuit and the wireless circuit, the air purification, wireless control and warning functions can be realized, and in addition, the first power supply output module, the second power supply output module and the third power supply output module are integrated together to supply power to each circuit respectively, so that the air purification, wireless control and warning functions are realized. A plurality of voltage conversion circuits and voltage conversion chips do not need to be arranged, so that the overall cost and the overall space are effectively saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air purifier technical field, concretely relates to an air purifier control system. BACKGROUND

[0002] With the wide application of air purifiers, users have higher and higher requirements for its performance and functions. In order to ensure the normal operation of the air purifier, especially the stable power supply of multiple circuit systems such as drive circuit, warning circuit, wireless circuit, main control circuit, it is often necessary to provide power output of multiple different voltages. However, in the prior art, multiple voltage conversion circuits and voltage conversion chips are usually used to realize this function. These traditional methods can meet the voltage demand, but there are some significant shortcomings.

[0003] The use of multiple voltage conversion circuits not only significantly increases the complexity of the system, but also may cause interference and mutual influence between circuits, thereby affecting the overall stability and performance of the air purifier. Secondly, since multiple voltage conversion chips are needed to process different voltage outputs, this will significantly increase the hardware cost. In addition, the design and layout of multiple voltage circuits often require more space, thereby increasing the occupied space inside the air purifier, making the product volume more bulky, which is not conducive to realizing compact design and improving the appearance of the product. SUMMARY

[0004] The utility model aims at the above-mentioned insufficient in prior art, provides an air purifier control system.

[0005] The utility model discloses a kind of air purifier control systems, including main control circuit, power supply circuit, warning circuit, drive circuit and wireless circuit;The power supply circuit, warning circuit, drive circuit and wireless circuit are respectively electrically connected with main control circuit;

[0006] The power supply circuit includes first power input, second power input, PWM pulse width modulation module, first power output module, second power output module and third power output module;The first power input and second power input are respectively connected with the input end of PWM pulse width modulation module;The first power output module, second power output module and third power output module are respectively connected with the output end of PWM pulse width modulation module;

[0007] The first power output module is used to power warning circuit and drive circuit;The second power output module is used to power main control circuit and wireless circuit;The third power output module is used to power wireless circuit and warning circuit.

[0008] The utility model further sets up, PWM pulse width modulation module includes PWM pulse width modulation chip U11 and primary winding, be equipped with resistance R1 between first power input and second power input, first power input and one end of primary winding are connected, the other end of primary winding is connected with the output end of PWM pulse width modulation chip U11, the power end of PWM pulse width modulation chip U11 is connected with second power input.

[0009] The utility model further sets up, the first power output module includes first rectifier filter module, first positive power output, first negative power output, first main filter capacitor EC14 and the first secondary winding that coordinates with primary winding,

[0010] The first rectifier filter module includes diode D13, capacitor C12 and resistance R11,

[0011] One end of the first secondary winding is connected with the first positive power output after passing diode D13, capacitor C12 and resistance R11 are connected and are arranged at the two ends of diode D13, the other end of the first secondary winding is connected with the first negative power output, the first main filter capacitor EC14 is arranged between the first positive power output and the first negative power output,

[0012] The first power output module further includes resistance R15, resistance R16, triode Q11 and first opto-coupler transmitter U12A, one end of resistance R15 is connected with the first positive power output, the other end of resistance R15 is connected with the base of triode Q11 after passing resistance R16, the collector of triode Q11 is grounded after passing first opto-coupler transmitter U12A, the emitter of triode Q11 is connected with the base of triode Q11 after passing resistance R16, the emitter of triode Q11 is connected with power supply,

[0013] The PWM pulse width modulation module further includes the first opto-coupler receiver U12B that coordinates with the first opto-coupler transmitter U12A, the feedback end of PWM pulse width modulation chip U11 is grounded after passing first opto-coupler receiver U12B.

[0014] The utility model further sets up, the second power output module includes second rectifier filter module, second positive power output, second negative power output, second main filter capacitor EC24 and the second secondary winding that coordinates with primary winding,

[0015] The second rectifier filter module includes diode D23, capacitor C22 and resistance R21,

[0016] One end of the second secondary winding is connected with the second positive power output port through diode D23; the capacitor C22 is connected with the resistor R21 and is arranged at two ends of the diode D23; the other end of the second secondary winding is connected with the second negative power output port; the second main filter capacitor EC24 is arranged between the second positive power output port and the second negative power output port;

[0017] The second power output module further comprises a resistor R25, a resistor R26, a triode Q21 and a second optocoupler transmitter U22A; one end of the resistor R25 is connected with the second positive power output port; the other end of the resistor R25 is connected with the base of the triode Q21 through the resistor R26; the collector of the triode Q21 is grounded through the second optocoupler transmitter U22A; the emitter of the triode Q21 is connected with the base of the triode Q21 through the resistor R26; the emitter of the triode Q21 is externally connected with a power supply;

[0018] The PWM pulse width modulation module further comprises a second optocoupler receiver U22B matched with the second optocoupler transmitter U22A; the feedback end of the PWM pulse width modulation chip U11 is grounded through the second optocoupler receiver U22B.

[0019] The third power output module comprises a third rectification and filtering module, a third positive power output port, a third negative power output port, a third main filter capacitor EC34 and a third secondary winding matched with the primary winding;

[0020] The third rectification and filtering module comprises a diode D33, a capacitor C32 and a resistor R31;

[0021] One end of the third secondary winding is connected with the third positive power output port through the diode D33; the capacitor C32 is connected with the resistor R31 and is arranged at two ends of the diode D33; the other end of the third secondary winding is connected with the third negative power output port; the third main filter capacitor EC34 is arranged between the third positive power output port and the third negative power output port;

[0022] The third power output module further comprises a resistor R35, a resistor R36, a triode Q31 and a third optocoupler transmitter U32A; one end of the resistor R35 is connected with the third positive power output port; the other end of the resistor R35 is connected with the base of the triode Q31 through the resistor R36; the collector of the triode Q31 is grounded through the third optocoupler transmitter U32A; the emitter of the triode Q31 is connected with the base of the triode Q31 through the resistor R36; the emitter of the triode Q31 is externally connected with a power supply;

[0023] The PWM pulse width modulation module further comprises a third optocoupler receiver U32B cooperating with a third optocoupler transmitter U32A; and the feedback end of the PWM pulse width modulation chip U11 is connected to ground through the third optocoupler receiver U32B.

[0024] The utility model further sets up, the warning circuit includes control chip U41, first lamp group, second lamp group, first switch module, second switch module, light feeling module and air quality sensor U42;

[0025] The control chip U41 is equipped with first output, second output, third output and power end, the first lamp group is connected with first output through first switch module, the second lamp group is connected with second output through second switch module, air quality sensor U42 is connected with third output, the control chip U41 controls the brightness of first lamp group and second lamp group through light feeling module, the power end of control chip U41 is connected with the output end of third power output module.

[0026] The utility model further sets up, the light feeling module includes photoresistor RA, resistance R40, resistance R45 and triode Q41, the control chip U41 is equipped with PWM end and collection end, one end of photoresistor RA is grounded, the other end of photoresistor RA is connected with collection end, the other end of photoresistor RA is connected with the output end of first power output module through resistance R45, the PWM end is connected with the base of triode Q41 after resistance R40, the emitter of triode Q41 is connected with power supply, the collector of triode Q41 is connected with one end of first lamp group and one end of second lamp group respectively.

[0027] The utility model further sets up, the first switch module includes triode Q42, resistance R46 and resistance R47, the first output is connected with the base of triode Q42 after resistance R46, the base of triode Q42 is grounded through resistance R47, the emitter of triode Q42 is grounded, the collector of triode Q42 is connected with the other end of first lamp group,

[0028] The first lamp group includes resistance R42, resistance R44, a plurality of first green LED and a plurality of second green LED, the resistance R42 and a plurality of first green LED are connected in series and are arranged between the collector of triode Q42 and the collector of triode Q41, the resistance R44 and a plurality of second green LED are connected in series and are arranged between the collector of triode Q42 and the collector of triode Q41,

[0029] The second switch module comprises a triode Q43, a resistor R48 and a resistor R49; the second output end is connected with the base of the triode Q43 after passing through the resistor R48; the base of the triode Q43 is grounded through the resistor R49; the emitter of the triode Q43 is grounded; and the collector of the triode Q43 is connected with the other end of the second lamp group.

[0030] The second lamp group comprises a resistor R41, a resistor R43, a plurality of first red LEDs and a plurality of second red LEDs; the resistor R41 and the plurality of first red LEDs are connected in series and arranged between the collector of the triode Q43 and the collector of the triode Q41; and the resistor R43 and the plurality of second red LEDs are connected in series and arranged between the collector of the triode Q43 and the collector of the triode Q41.

[0031] The utility model further sets up, the main control module includes main control chip U1, the drive circuit includes connector, MOS tube Q51, MOS tube Q52 resistor R51 and resistor R52, the gate of MOS tube Q51 is connected with main control chip U1, the gate of MOS tube Q51 is connected with the source of MOS tube Q51 after passing through resistor R51, the source of MOS tube Q51 is grounded, the drain of MOS tube Q51 is connected with the output end of first power output module after passing through resistor R52, the drain of MOS tube Q51 is connected with the gate of MOS tube Q52, the source of MOS tube Q52 is connected with the output end of first power output module, MOS tube Q52 drain is connected with the connector.

[0032] The utility model further sets up, the wireless circuit includes wireless chip U61 and peripheral circuit, wireless chip U61 is connected with main control chip U1 through peripheral circuit, the output end of second power output module and the output end of third power output module are connected with peripheral circuit respectively, the output end of third power output module is connected with wireless chip U61.

[0033] The utility model discloses the beneficial effects: the utility model discloses through setting up main control circuit, power supply circuit, warning circuit, drive circuit and wireless circuit, can realize air purification, wireless control and warning function, in addition through with first power output module, second power output module and third power output module integration together, respectively to each circuit power supply, need not set up multiple voltage conversion circuit and voltage conversion chip again, effectively save the cost of whole and the space of whole. BRIEF DESCRIPTION OF DRAWINGS

[0034] The utility model is further described with the help of the drawings, but the embodiment in the drawings does not constitute any limitation to the utility model, and other drawings can be obtained by the ordinary skilled in the art without paying creative labor according to the following drawings.

[0035] Figure 1 It is the system block diagram of the utility model;

[0036] Figure 2 It is the circuit principle drawing of the main control circuit of the utility model;

[0037] Figure 3 It is the circuit principle drawing of the power supply circuit of the utility model;

[0038] Figure 4 It is the circuit principle drawing of the warning circuit of the utility model;

[0039] Figure 5 It is the circuit principle drawing of the drive circuit of the utility model;

[0040] Figure 6 It is the circuit principle drawing of the wireless circuit of the utility model;

[0041] Wherein: 11, first power input port; 12, second power input port; 21, first positive power output port; 22, first negative power output port; 31, second positive power output port; 32, second negative power output port; 41, third positive power output port; 42, third negative power output port; 51, first green LED; 52, second green LED; 61, first red LED; 62, second red LED; 7, connector. DETAILED DESCRIPTION

[0042] The utility model is further described in combination with the following embodiments.

[0043] From Figures 1 to 6 It can be known that the air purifier control system described in the embodiment comprises a main control circuit, a power supply circuit, a warning circuit, a drive circuit and a wireless circuit; the power supply circuit, the warning circuit, the drive circuit and the wireless circuit are electrically connected with the main control circuit respectively;

[0044] The power supply circuit comprises a first power input port 11, a second power input port 12, a PWM pulse width modulation module, a first power output module, a second power output module and a third power output module; the first power input port 11 and the second power input port 12 are connected with the input end of the PWM pulse width modulation module respectively; the first power output module, the second power output module and the third power output module are connected with the output end of the PWM pulse width modulation module respectively;

[0045] The first power output module is used for power supply of the warning circuit and the driving circuit; the second power output module is used for power supply of the main control circuit and the wireless circuit; and the third power output module is used for power supply of the wireless circuit and the warning circuit.

[0046] Specifically, the air purifier control system in the embodiment is used by connecting an external power supply between the first power input port 11 and the second power input port 12. The external power supply provides voltage for the first power output module, the second power output module and the third power output module in turn under the action of the PWM pulse width modulation module, so that the first power output module, the second power output module and the third power output module output power supply with different voltages to the main control circuit, the warning circuit, the driving circuit and the wireless circuit. The main control circuit is used for controlling the whole air purifier system, the warning circuit is used for reminding the user of the current air quality, the driving circuit is used for connecting the motor of the air purifier to purify the air, and the wireless circuit is used for realizing wireless transmission with external equipment.

[0047] The air purifier control system in the embodiment can realize air purification, wireless control and warning functions by setting the main control circuit, the power supply circuit, the warning circuit, the driving circuit and the wireless circuit. In addition, the first power output module, the second power output module and the third power output module are integrated together to supply power to each circuit, so that multiple voltage conversion circuits and voltage conversion chips are not needed, thereby effectively saving the overall cost and the overall space.

[0048] The air purifier control system in the embodiment, the PWM pulse width modulation module includes a PWM pulse width modulation chip U11 and a primary winding; the first power input port 11 and the second power input port 12 are provided with a resistor R1; one end of the primary winding is connected with the first power input port 11; the other end of the primary winding is connected with the output end of the PWM pulse width modulation chip U11; and the power supply end of the PWM pulse width modulation chip U11 is connected with the second power input port 12. The model of the PWM pulse width modulation chip U11 is LY9525, which is internally integrated with a switch tube. The PWM pulse width can be modulated to control the on-off of the internally integrated switch tube, so as to output voltage through the primary winding to the first power output module, the second power output module and the third power output module. The PWM pulse width modulation chip U11 is connected with the main control chip U1 and is controlled by the main control chip U1.

[0049] The first power output module in the air purifier control system in the embodiment includes a first rectification and filtering module, a first positive power output port 21, a first negative power output port 22, a first main filter capacitor EC14 and a first secondary winding cooperating with the primary winding.

[0050] The first rectification and filtering module comprises a diode D13, a capacitor C12 and a resistor R11; the diode D13 is capable of rectifying the secondary current; the capacitor C12 is capable of performing first filtering processing on the secondary current to reduce ripples; the resistor R11 is capable of inhibiting high-frequency oscillation and improving waveform quality; and the first main filtering capacitor EC14 is capable of smoothing the rectified direct current voltage and simultaneously providing a short-time energy storage function to cope with transient changes of the output terminal load.

[0051] One end of the first secondary winding is connected with the first positive power output port 21 through the diode D13; the capacitor C12 and the resistor R11 are connected and arranged at both ends of the diode D13; the other end of the first secondary winding is connected with the first negative power output port 22; and the first main filtering capacitor EC14 is arranged between the first positive power output port 21 and the first negative power output port 22; specifically, the first secondary winding cooperates with the primary winding to generate a voltage in the first secondary winding, and 24V voltage is output between the first positive power output port 21 and the first negative power output port 22 after the first rectification and filtering module and the first main filtering capacitor EC24.

[0052] The first power output module further comprises a resistor R15, a resistor R16, a triode Q11 and a first optocoupler transmitter U12A; one end of the resistor R15 is connected with the first positive power output port 21; the other end of the resistor R15 is connected with the base of the triode Q11 through the resistor R16; the collector of the triode Q11 is grounded through the first optocoupler transmitter U12A; the emitter of the triode Q11 is connected with the base of the triode Q11 through the resistor R16; and the emitter of the triode Q11 is externally connected with a power supply.

[0053] The PWM pulse width modulation module further comprises a first optocoupler receiver U12B cooperating with the first optocoupler transmitter U12A; and the feedback end of the PWM pulse width modulation chip U11 is grounded through the first optocoupler receiver U12B.

[0054] Specifically, when the load of the first power output module is short-circuited, the current sharply rises, so that the triode Q11 is turned on through the resistor R15, the first optocoupler transmitter U12A is powered on and emits light, the first optocoupler receiver U12B is turned on and grounded after receiving the signal, and the PWM pulse width modulation chip U11 senses it and controls the entire power supply circuit to stop working.

[0055] The second power output module of the air purifier control system comprises a second rectification and filtering module, a second positive power output port 31, a second negative power output port 32, a second main filtering capacitor EC24 and a second secondary winding cooperating with the primary winding.

[0056] The second rectification and filtering module comprises a diode D23, a capacitor C22 and a resistor R21; the diode D23 is capable of rectifying the secondary current; the capacitor C22 is capable of performing first filtering processing on the secondary current to reduce ripples; the resistor R21 is capable of inhibiting high-frequency oscillation and improving waveform quality; and the first main filtering capacitor EC24 is capable of smoothing the rectified direct current voltage and simultaneously providing short-time energy storage function to cope with instantaneous changes of the output terminal load.

[0057] One end of the second secondary winding is connected with the second positive power output port 31 through the diode D23; the capacitor C22 and the resistor R21 are connected and arranged at both ends of the diode D23; the other end of the second secondary winding is connected with the second negative power output port 32; and the second main filtering capacitor EC24 is arranged between the second positive power output port 31 and the second negative power output port 32.

[0058] Specifically, the second secondary winding cooperates with the primary winding to generate voltage in the second secondary winding, and 5V voltage is output between the second positive power output port 31 and the second negative power output port 32 through the second rectification and filtering module and the second main filtering capacitor EC24.

[0059] The second power output module further comprises a resistor R25, a resistor R26, a triode Q21 and a second optocoupler transmitter U22A; one end of the resistor R25 is connected with the second positive power output port 31; the other end of the resistor R25 is connected with the base of the triode Q21 through the resistor R26; the collector of the triode Q21 is grounded through the second optocoupler transmitter U22A; the emitter of the triode Q21 is connected with the base of the triode Q21 through the resistor R26; and the emitter of the triode Q21 is externally connected with a power supply.

[0060] The PWM pulse width modulation module further comprises a second optocoupler receiver U22B cooperating with the second optocoupler transmitter U22A; and the feedback end of the PWM pulse width modulation chip U11 is grounded through the second optocoupler receiver U22B. Specifically, when the load of the second power output module is short-circuited, the current sharply rises to make the triode Q21 conduct through the resistor R25, the second optocoupler transmitter U22A is powered on to emit light, the second optocoupler receiver U22B is turned on to ground after receiving the signal, and the PWM pulse width modulation chip U11 senses it to control the entire circuit to stop working.

[0061] The third power output module comprises a third rectification and filtering module, a third positive power output port 41, a third negative power output port 42, a third main filtering capacitor EC34 and a third secondary winding cooperating with the primary winding.

[0062] The third rectification and filtering module comprises a diode D33, a capacitor C32 and a resistor R31; the diode D33 is capable of rectifying the secondary current; the capacitor C32 is capable of performing first filtering processing on the secondary current to reduce ripples; the resistor R31 is capable of inhibiting high-frequency oscillation and improving waveform quality; and the first main filter capacitor EC34 is capable of smoothing the rectified direct current voltage and simultaneously providing short-time energy storage function to cope with instantaneous changes of the load at the output end.

[0063] One end of the third secondary winding is connected with the third positive power output port 41 through the diode D33; the capacitor C32 and the resistor R31 are connected and arranged at both ends of the diode D33; the other end of the third secondary winding is connected with the third negative power output port 42; and the third main filter capacitor EC34 is arranged between the third positive power output port 41 and the third negative power output port 42.

[0064] Specifically, the third secondary winding cooperates with the primary winding to generate voltage at the third secondary winding, and 3.3V voltage is output between the third positive power output port 41 and the third negative power output port 42 after the third rectification and filtering module and the third main filter capacitor EC34.

[0065] The third power output module further comprises a resistor R35, a resistor R36, a triode Q31 and a third optocoupler transmitter U32A; one end of the resistor R35 is connected with the third positive power output port 41; the other end of the resistor R35 is connected with the base of the triode Q31 through the resistor R36; the collector of the triode Q31 is grounded through the third optocoupler transmitter U32A; the emitter of the triode Q31 is connected with the base of the triode Q31 through the resistor R36; and the emitter of the triode Q31 is externally connected with a power supply.

[0066] The PWM pulse width modulation module further comprises a third optocoupler receiver U32B cooperating with the third optocoupler transmitter U32A; and the feedback end of the PWM pulse width modulation chip U11 is grounded through the third optocoupler receiver U32B. Specifically, when the load of the third power output module is short-circuited, the current sharply rises to make the triode Q31 conduct through the resistor R35, the third optocoupler transmitter U32A is powered on to emit light, the third optocoupler receiver U32B is turned on to ground after receiving the signal, and the PWM pulse width modulation chip U11 senses it to control the entire circuit to stop working. The third optocoupler receiver U32B, the second optocoupler receiver U22B and the first optocoupler receiver U12B are connected in parallel with each other, so that when one of the power output modules is short-circuited, the PWM pulse width modulation chip U11 controls the entire circuit to stop working, thereby effectively protecting the power supply circuit.

[0067] The warning circuit of the air purifier control system comprises a control chip U41, a first lamp group, a second lamp group, a first switch module, a second switch module, a light sensing module and an air quality sensor U42.

[0068] The control chip U41 is provided with a first output end, a second output end, a third output end and a power supply end; the first lamp group is connected with the first output end through the first switch module; the second lamp group is connected with the second output end through the second switch module; the air quality sensor U42 is connected with the third output end; the control chip U41 controls the brightness of the first lamp group and the second lamp group through the light sensing module; the power supply end of the control chip U41 is connected with the output end of the third power supply output module, i.e. a 3.3V voltage power supply; wherein the control chip U41 is a single-chip microcomputer capable of outputting a PWM signal; the control chip U41 is connected with a main control chip U1 and is controlled by the main control chip U1.

[0069] When the air quality of the environment is normal, the control chip U41 controls the first switch module to be turned on, so that the light sensing module can control the brightness of the first lamp group according to the ambient brightness; when the air quality of the environment is poor, the control chip U41 controls the second switch module to be turned on, so that the light sensing module can control the brightness of the second lamp group according to the ambient brightness. Through the arrangement of the first lamp group and the second lamp group, different lamp groups can emit light according to the control quality of the environment, so as to remind the user; in addition, the first lamp group and the second lamp group comprise a plurality of LEDs, which can be arranged at different places, so as to facilitate the user to observe; in addition, the plurality of LEDs can also be arranged in a specific shape, further facilitating the user to observe; secondly, through the arrangement of the light sensing module, the brightness of the lamp group can be changed to ensure the comfortable brightness under different ambient light intensities.

[0070] The light sensing module of the air purifier control system comprises a photoresistor RA, a resistor R40, a resistor R45 and a triode Q41; the control chip U41 is provided with a PWM end and a collection end; one end of the photoresistor RA is grounded; the other end of the photoresistor RA is connected with the collection end; the other end of the photoresistor RA is connected with the output end of the first power supply output module through the resistor R45; the PWM end is connected with the base of the triode Q41 after passing through the resistor R40; the emitter of the triode Q41 is externally connected with a power supply; the collector of the triode Q41 is connected with one end of the first lamp group and one end of the second lamp group, respectively. The photoresistor RA can change the resistance value according to the ambient brightness, and through the voltage division of the resistor R45, the control chip U41 can judge the ambient brightness by collecting the resistance value of the photoresistor RA, so as to output a PWM with different duty cycles to control the on-off of the triode Q41, so that the first lamp group and the second lamp group can emit light with different brightness according to the ambient brightness.

[0071] The air purifier control system provided in the embodiment comprises a first switch module, a second switch module, a first lamp group and a second lamp group.

[0072] The first lamp group comprises a resistor R42, a resistor R44, a plurality of first green LEDs 51 and a plurality of second green LEDs 52; the resistor R42 and the plurality of first green LEDs 51 are connected in series and arranged between the collector of the triode Q42 and the collector of the triode Q41; the resistor R44 and the plurality of second green LEDs 52 are connected in series and arranged between the collector of the triode Q42 and the collector of the triode Q41; wherein the resistor R42 and the resistor R44 serve as current limiters to protect the first green LEDs 51 and the second green LEDs 52; the two groups of green LEDs in parallel can work normally when one group of green LEDs fails.

[0073] The second switch module comprises a triode Q43, a resistor R48 and a resistor R49; the second output end is connected with the base of the triode Q43 through the resistor R48; the base of the triode Q43 is grounded through the resistor R49; the emitter of the triode Q43 is grounded; the collector of the triode Q43 is connected with the other end of the second lamp group; specifically, when the air quality of the environment is normal, the second output end of the control chip U41 outputs a high level, so that the triode Q43 is turned on, and at this time, the 24V power supply, the triode Q41, the first lamp group, the triode Q43 and the ground form a loop, and the second lamp group emits light.

[0074] The second lamp group includes a resistor R41, a resistor R43, a plurality of first red LEDs 61, and a plurality of second red LEDs 62; the resistor R41 is connected in series with the plurality of first red LEDs 61 and is arranged between the collector of the triode Q43 and the collector of the triode Q41; the resistor R43 is connected in series with the plurality of second red LEDs 62 and is arranged between the collector of the triode Q43 and the collector of the triode Q41. The resistor R41 and the resistor R43 serve to limit the current and protect the first red LEDs 61 and the second red LEDs 62; by arranging two groups of red LEDs in parallel, when one group of red LEDs fails, the other group of red LEDs can work normally.

[0075] The main control module includes a main control chip U1; the driving circuit includes a connector 7, a MOS tube Q51, a MOS tube Q52, a resistor R51, and a resistor R52; the gate of the MOS tube Q51 is connected with the main control chip U1; the gate of the MOS tube Q51 is connected with the source of the MOS tube Q51 through the resistor R51; the source of the MOS tube Q51 is grounded; the drain of the MOS tube Q51 is connected with the output end of the first power output module, i.e., a 24V voltage power supply, through the resistor R52; the drain of the MOS tube Q51 is connected with the gate of the MOS tube Q52; the source of the MOS tube Q52 is connected with the output end of the first power output module; the drain of the MOS tube Q52 is connected with the connector 7; and the main control chip U1 is an MCU.

[0076] Specifically, when the air quality is poor, the main control chip U1 outputs a high-level signal to the gate of the MOS tube Q51, the MOS tube Q51 is turned on, the resistor R52 obtains a voltage, and thus the MOS tube Q52 is turned on; at this time, the 24V voltage power supply can supply power to the motor of the air purifier through the connector 7, so that the air purifier starts to purify the air.

[0077] The wireless circuit includes a wireless chip U61 and a peripheral circuit; the wireless chip U61 is connected with the main control chip U1 through the peripheral circuit; the output end of the second power output module, i.e., a 5V voltage power supply, and the output end of the third power output module, i.e., a 3.3V voltage power supply, are connected with the peripheral circuit respectively; and the output end of the third power output module, i.e., the 3.3V voltage power supply, is connected with the wireless chip U61. Through the above arrangement, wireless transmission with external equipment can be realized.

[0078] It should be explained finally that the above embodiment is only used to illustrate the technical scheme of the utility model, and is not the limit of the protection scope of the utility model, although the utility model is explained in detail with reference to the preferred embodiment, the ordinary skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently, and does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. An air purifier control system, characterized by: The power supply circuit, the warning circuit, the driving circuit and the wireless circuit are electrically connected with the master control circuit respectively; The power supply circuit includes a first power input port, a second power input port, a PWM pulse width modulation module, a first power output module, a second power output module and a third power output module; the first power input port and the second power input port are connected with the input end of the PWM pulse width modulation module respectively; the first power output module, the second power output module and the third power output module are connected with the output end of the PWM pulse width modulation module respectively; The first power output module is used for supplying power to the warning circuit and the driving circuit; the second power output module is used for supplying power to the master control circuit and the wireless circuit; and the third power output module is used for supplying power to the wireless circuit and the warning circuit.

2. The air cleaner control system of claim 1, wherein: The PWM pulse width modulation module includes a PWM pulse width modulation chip U11 and a primary winding; a resistor R1 is arranged between the first power input port and the second power input port; one end of the primary winding is connected with the first power input port; the other end of the primary winding is connected with the output end of the PWM pulse width modulation chip U11; and the power supply end of the PWM pulse width modulation chip U11 is connected with the second power input port.

3. The air cleaner control system of claim 2, wherein: The first power output module includes a first rectification and filtering module, a first positive power output port, a first negative power output port, a first main filter capacitor EC14 and a first secondary winding cooperating with the primary winding; The first rectification and filtering module includes a diode D13, a capacitor C12 and a resistor R11; One end of the first secondary winding is connected with the first positive power output port through the diode D13; the capacitor C12 and the resistor R11 are connected and arranged at both ends of the diode D13; the other end of the first secondary winding is connected with the first negative power output port; and the first main filter capacitor EC14 is arranged between the first positive power output port and the first negative power output port; The first power output module further includes a resistor R15, a resistor R16, a triode Q11 and a first optical coupler transmitter U12A; one end of the resistor R15 is connected with the first positive power output port; the other end of the resistor R15 is connected with the base of the triode Q11 through the resistor R16; the collector of the triode Q11 is grounded through the first optical coupler transmitter U12A; the emitter of the triode Q11 is connected with the base of the triode Q11 through the resistor R16; and the emitter of the triode Q11 is externally connected with a power supply. The PWM pulse width modulation module further includes a first optical coupler receiver U12B cooperating with the first optical coupler transmitter U12A; and the feedback end of the PWM pulse width modulation chip U11 is grounded through the first optical coupler receiver U12B.

4. The air cleaner control system of claim 2, wherein: The second power output module includes a second rectification and filtering module, a second positive power output port, a second negative power output port, a second main filter capacitor EC24 and a second secondary winding cooperating with the primary winding; The second rectification and filtering module includes a diode D23, a capacitor C22 and a resistor R21; The second rectification and filtering module includes a diode D23, a capacitor C22 and a resistor R21; One end of the second secondary winding is connected with the second positive power output port through diode D23; the capacitor C22 is connected with the resistor R21 and is arranged at both ends of the diode D23; the other end of the second secondary winding is connected with the second negative power output port; the second main filter capacitor EC24 is arranged between the second positive power output port and the second negative power output port; The second power output module further comprises a resistor R25, a resistor R26, a triode Q21 and a second optical coupler transmitter U22A; one end of the resistor R25 is connected with the second positive power output port; the other end of the resistor R25 is connected with the base of the triode Q21 through the resistor R26; the collector of the triode Q21 is grounded through the second optical coupler transmitter U22A; the emitter of the triode Q21 is connected with the base of the triode Q21 through the resistor R26; the emitter of the triode Q21 is externally connected with a power supply; The PWM pulse width modulation module further comprises a second optical coupler receiver U22B matched with the second optical coupler transmitter U22A; the feedback end of the PWM pulse width modulation chip U11 is grounded through the second optical coupler receiver U22B.

5. The air cleaner control system of claim 2, wherein: The third power output module comprises a third rectification and filtering module, a third positive power output port, a third negative power output port, a third main filter capacitor EC34 and a third secondary winding matched with the primary winding; The third rectification and filtering module comprises a diode D33, a capacitor C32 and a resistor R31; One end of the third secondary winding is connected with the third positive power output port through the diode D33; the capacitor C32 is connected with the resistor R31 and is arranged at both ends of the diode D33; the other end of the third secondary winding is connected with the third negative power output port; the third main filter capacitor EC34 is arranged between the third positive power output port and the third negative power output port; The third power output module further comprises a resistor R35, a resistor R36, a triode Q31 and a third optical coupler transmitter U32A; one end of the resistor R35 is connected with the third positive power output port; the other end of the resistor R35 is connected with the base of the triode Q31 through the resistor R36; the collector of the triode Q31 is grounded through the third optical coupler transmitter U32A; the emitter of the triode Q31 is connected with the base of the triode Q31 through the resistor R36; the emitter of the triode Q31 is externally connected with a power supply; The PWM pulse width modulation module further comprises a third optical coupler receiver U32B matched with the third optical coupler transmitter U32A; the feedback end of the PWM pulse width modulation chip U11 is grounded through the third optical coupler receiver U32B.

6. The air cleaner control system of claim 1, wherein: The warning circuit comprises a control chip U41, a first lamp group, a second lamp group, a first switch module, a second switch module, a light sensing module and an air quality sensor U42; The control chip U41 is provided with a first output end, a second output end, a third output end and a power supply end; the first lamp group is connected with the first output end through a first switch module; the second lamp group is connected with the second output end through a second switch module; the air quality sensor U42 is connected with the third output end; the control chip U41 controls the brightness of the first lamp group and the second lamp group through a light sensing module; and the power supply end of the control chip U41 is connected with the output end of a third power supply output module.

7. The air cleaner control system of claim 6, wherein: The light sensing module comprises a photoresistor RA, a resistor R40, a resistor R45 and a triode Q41; the control chip U41 is provided with a PWM end and a collection end; one end of the photoresistor RA is grounded; the other end of the photoresistor RA is connected with the collection end; the other end of the photoresistor RA is connected with the output end of a first power supply output module through the resistor R45; the PWM end is connected with the base of the triode Q41 after passing through the resistor R40; the emitter of the triode Q41 is externally connected with a power supply; and the collector of the triode Q41 is connected with one end of the first lamp group and one end of the second lamp group respectively.

8. The air cleaner control system of claim 7, wherein: The first switch module comprises a triode Q42, a resistor R46 and a resistor R47; the first output end is connected with the base of the triode Q42 after passing through the resistor R46; the base of the triode Q42 is grounded through the resistor R47; the emitter of the triode Q42 is grounded; and the collector of the triode Q42 is connected with the other end of the first lamp group; The first lamp group comprises a resistor R42, a resistor R44, a plurality of first green LEDs and a plurality of second green LEDs; the resistor R42 and the plurality of first green LEDs are connected in series and arranged between the collector of the triode Q42 and the collector of the triode Q41; and the resistor R44 and the plurality of second green LEDs are connected in series and arranged between the collector of the triode Q42 and the collector of the triode Q41; The second switch module comprises a triode Q43, a resistor R48 and a resistor R49; the second output end is connected with the base of the triode Q43 after passing through the resistor R48; the base of the triode Q43 is grounded through the resistor R49; the emitter of the triode Q43 is grounded; and the collector of the triode Q43 is connected with the other end of the second lamp group; The second lamp group comprises a resistor R41, a resistor R43, a plurality of first red LEDs and a plurality of second red LEDs; the resistor R41 and the plurality of first red LEDs are connected in series and arranged between the collector of the triode Q43 and the collector of the triode Q41; and the resistor R43 and the plurality of second red LEDs are connected in series and arranged between the collector of the triode Q43 and the collector of the triode Q41.

9. The air cleaner control system of claim 1, wherein: The master control circuit comprises a master control chip U1; the driving circuit comprises a connector, a MOS tube Q51, a MOS tube Q52, a resistor R51 and a resistor R52; the gate of the MOS tube Q51 is connected with the master control chip U1; the gate of the MOS tube Q51 is connected with the source of the MOS tube Q51 through the resistor R51; the source of the MOS tube Q51 is grounded; the drain of the MOS tube Q51 is connected with the output end of the first power output module through the resistor R52; the drain of the MOS tube Q51 is connected with the gate of the MOS tube Q52; the source of the MOS tube Q52 is connected with the output end of the first power output module; the drain of the MOS tube Q52 is connected with the connector.

10. The air cleaner control system of claim 9, wherein: The wireless circuit comprises a wireless chip U61 and a peripheral circuit; the wireless chip U61 is connected with the master control chip U1 through the peripheral circuit; the output end of the second power output module and the output end of the third power output module are connected with the peripheral circuit respectively; the output end of the third power output module is connected with the wireless chip U61.

Images