Infrared tube detection dust control circuit

Abstract

The utility model relates to the technical field of dust quantity detection, and discloses an infrared tube dust detection control circuit which is high in reliability and good in detection effect, and comprises a main control circuit (100) used for outputting pulse signals, a motor control circuit (300) and a signal transceiving circuit (200), the output end of the signal transceiving circuit (200) is connected with one signal input end of the main control circuit (100), and the output end of the signal transceiving circuit (200) is connected with the other signal input end of the main control circuit (100). And the master control circuit (100) turns the pulse signal into a high level according to the fed-back infrared signal so as to control the motor control circuit (300) to stop working.

Description

Technical Field

[0001] The utility model relates to the technical field of dust quantity detection, and more specifically, to an infrared tube dust detection control circuit. Background Art

[0002] Dust concentration detection sensors are relatively common detection devices in air purifiers and floor sweeping robots. Inside them, there are infrared light-emitting diodes and phototransistors distributed in pairs of pins, which work based on the photosensitive principle and are used to detect extremely fine particles (such as dust particles and fine dust), and rely on the height of the output pulse to judge the particle concentration. At present, the dust detection circuits on the market are relatively complex, and the beam penetration is poor, making it difficult to accurately detect objects in harsh environments, resulting in low detection accuracy of the detection circuit and relatively high power consumption.

[0003] Therefore, how to improve the reliability and accuracy of dust detection has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an infrared tube dust detection control circuit with relatively high reliability and better detection effect in view of the defects of the existing dust detection circuit, which is relatively complex, has poor beam penetration, and is difficult to accurately detect objects in harsh environments, resulting in low detection accuracy of the detection circuit.

[0005] The technical solution adopted by the utility model to solve its technical problem is to construct an infrared tube dust detection control circuit, which is characterized by comprising:

[0006] A main control circuit, which is configured inside the dust control circuit and is used to output pulse signals;

[0007] A motor control circuit, whose input end is connected to an output end of the main control circuit and is used to receive the pulse signal, and the motor control circuit controls the working state of the motor through the input pulse signal;

[0008] A signal transceiver circuit, whose signal input end is coupled to an output end of the main control circuit and is used to receive a control signal to control the operation of the signal transceiver circuit to output an infrared signal;

[0009] The output end of the signal transceiver circuit is connected to a signal input end of the main control circuit, and the main control circuit flips the pulse signal to a high level according to the feedback infrared signal to control the motor control circuit to stop working.

[0010] In some embodiments, the signal transceiver circuit includes a switch circuit, a transmitting / receiving module, and an infrared receiving circuit.

[0011] Among them, the signal input end of the switch circuit is coupled to an output end of the main control circuit, and is used to receive a control signal to control the switch circuit to conduct;

[0012] One end of the transmitting / receiving module is connected to the output end of the switch circuit. The switch circuit is used to trigger the transmitting / receiving module to work to output the infrared signal;

[0013] The signal input end of the infrared receiving circuit is connected to the output end of the transmitting / receiving module and is used to receive the infrared signal,

[0014] The output end of the infrared receiving circuit is connected to a signal input end of the main control circuit.

[0015] In some embodiments, the transmitting / receiving module includes an infrared transmitting tube and a receiving tube connected in series. Among them,

[0016] The power input ends of the infrared transmitting tube and the receiving tube are connected to the +5V voltage signal terminal,

[0017] One end of the infrared transmitting tube is connected to the output end of the switch circuit,

[0018] When the switch circuit is controlled to conduct, the +5V voltage signal triggers the infrared transmitting tube to work to output the infrared signal,

[0019] The receiving tube is used to receive the infrared signal. Among them,

[0020] The output end of the receiving tube is connected to the signal input end of the infrared receiving circuit.

[0021] In some embodiments, the switch circuit includes a first triode, a tenth resistor, an eleventh resistor and a fifth capacitor,

[0022] The base of the first triode is respectively connected to one ends of the tenth resistor and the fifth capacitor,

[0023] The other end of the tenth resistor is connected to an output end of the main control circuit to receive the control signal,

[0024] The collector of the first triode is connected to one end of the eleventh resistor,

[0025] The other end of the eleventh resistor is connected to the cathode of the infrared transmitting tube,

[0026] The emitter of the first triode and the other end of the fifth capacitor are connected to the common terminal,

[0027] When the input control signal is at a high level, the first triode is controlled to conduct, and the +5V voltage signal passes through the infrared emitting diode and the collector - emitter of the first triode to the common terminal.

[0028] In some embodiments, the infrared receiving circuit includes a sixth capacitor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, and a seventh capacitor.

[0029] Wherein, the sixth capacitor is connected in series with the thirteenth resistor and then connected in parallel with the twelfth resistor, the fourteenth resistor, and the seventh capacitor.

[0030] One end of the sixth capacitor and the twelfth resistor is connected to the output end of the receiving tube.

[0031] One end of the thirteenth resistor is connected to a signal input end of the main control circuit.

[0032] In some embodiments, the main control circuit includes at least a main controller.

[0033] An output end of the main controller is connected to the input end of the motor control circuit for outputting the pulse signal.

[0034] Another output end of the main controller is connected to the base of the first triode for outputting the control signal.

[0035] An input end of the main controller is coupled to one end of the thirteenth resistor for receiving the infrared signal and inverting the pulse signal to a high level according to the fed - back infrared signal to control the motor control circuit to stop working.

[0036] In some embodiments, the motor control circuit includes a first control branch, a second control branch, and a third control branch.

[0037] The signal input end of the first control branch is connected to an output end of the main controller for receiving a pulse signal.

[0038] The power input end of the first control branch is connected to the +5V voltage signal terminal.

[0039] The signal input end of the second control branch is connected to another output end of the main controller for receiving another pulse signal.

[0040] The power input end of the second control branch is connected to the +5V voltage signal terminal.

[0041] The signal input end of the third control branch is connected to the third output end of the main controller for receiving a third pulse signal.

[0042] The power input terminal of the third control branch is connected to the +5V voltage signal terminal.

[0043] In some embodiments, the first control branch at least includes a first optocoupler and a first thyristor.

[0044] The input terminal of the first optocoupler is connected to an output terminal of the main controller for receiving a pulse signal.

[0045] The power input terminal of the first optocoupler is connected to the +5V voltage signal terminal.

[0046] One output terminal of the first optocoupler is connected to the first end of the first thyristor.

[0047] The other output terminal of the first optocoupler is connected to the control terminal of the first thyristor.

[0048] The second end of the first thyristor is connected to one end of the motor.

[0049] In some embodiments, the second control branch at least includes a second optocoupler and a second thyristor.

[0050] The input terminal of the second optocoupler is connected to another output terminal of the main controller for receiving another pulse signal.

[0051] The power input terminal of the second optocoupler is connected to the +5V voltage signal terminal.

[0052] One output terminal of the second optocoupler is connected to the first end of the second thyristor.

[0053] The other output terminal of the second optocoupler is connected to the control terminal of the second thyristor.

[0054] The second end of the second thyristor is connected to the other end of the motor.

[0055] In some embodiments, the third control branch at least includes a third optocoupler and a third thyristor.

[0056] The input terminal of the third optocoupler is connected to the third output terminal of the main controller for receiving a third pulse signal.

[0057] The power input terminal of the third optocoupler is connected to the +5V voltage signal terminal.

[0058] One output terminal of the third optocoupler is connected to the first end of the third thyristor.

[0059] The other output terminal of the third optocoupler is connected to the control terminal of the third thyristor.

[0060] The second terminal of the third thyristor is connected to the third terminal of the motor.

[0061] In the infrared tube dust detection control circuit of the present utility model, it includes a main control circuit, a motor control circuit, and a signal transceiver circuit for outputting pulse signals. Among them, the output terminal of the signal transceiver circuit is connected to a signal input terminal of the main control circuit. The main control circuit flips the pulse signal to a high level according to the feedback infrared signal to control the motor control circuit to stop working. Compared with the prior art, the current set dust amount is detected by the signal transceiver circuit, then converted into an electrical signal and output to the main control circuit, and then the motor control circuit is controlled to stop working according to the feedback infrared signal (electrical signal). Using this technical solution, the signal transceiver circuit design is relatively simple, the number of components is reduced, its detection performance is relatively accurate, and the reliability is high. It can effectively solve the problems that the current dust detection circuit is relatively complex, it is difficult to accurately detect objects in harsh environments, and the detection accuracy of the detection circuit is not high. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0063] Figure 1 is the circuit schematic diagram of an embodiment of the main control circuit provided by the present utility model;

[0064] Figure 2 is the circuit schematic diagram of an embodiment of the signal transceiver circuit provided by the present utility model;

[0065] Figure 3 is the circuit schematic diagram of an embodiment of the motor control circuit provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0066] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the drawings.

[0067] As Figures 1-3 shown, in the first embodiment of the infrared tube dust detection control circuit of the present utility model, the infrared tube dust detection control circuit (100, 200, 300) includes a main control circuit 100, a signal transceiver circuit 200, and a motor control circuit 300.

[0068] Among them, the main control circuit 100, as the core of the control circuit, has functions of infrared signal reception, operation, and action, and is used to output multiple pulse signals and control signals;

[0069] The signal transceiver circuit 200 is used to detect the dust parameters inside the current device, convert the dust parameters into infrared signals (or electrical signals), and then feedback them to the main control circuit 100;

[0070] The motor control circuit 300 is used to receive multiple pulse signals output by the main control circuit 100 and control the working state of the motor M2 (such as stop / start / speed regulation) according to different pulse signals.

[0071] Among them, the signal transceiver circuit 200 includes a transmitting / receiving module 210, a switching circuit 220, and an infrared receiving circuit 230.

[0072] The transmitting / receiving module 210 is used to detect the dust parameters in the storage box of the current device and convert the dust parameters into infrared signals (or electrical signals);

[0073] The switching circuit 220 is used to receive the control signal output by the main control circuit 100. When the input control signal is at a low level, the transmitting / receiving module 210 is controlled to be turned off.

[0074] When the input control signal is at a high level, the transmitting / receiving module 210 is controlled to work, and the transmitting / receiving module 210 outputs the infrared signal (or electrical signal) to the infrared receiving circuit 230;

[0075] The infrared receiving circuit 230 is used to receive and process the infrared signal (or electrical signal), and then output the processed infrared signal (or electrical signal) to the main control circuit 100.

[0076] Specifically, the main control circuit 100 is configured inside the dust control circuit and is used to output multiple pulse signals and control signals;

[0077] The input end of the motor control circuit 300 is respectively connected to an output end of the main control circuit 100 and is used to receive at least one pulse signal. When the input pulse signal is at a low level, the motor control circuit 300 is controlled to be turned on, thereby controlling the working state of the motor M2 (low speed / high speed) to collect dust;

[0078] Furthermore, the signal input end of the signal transceiver circuit 200 is coupled to an output end of the main control circuit 100 and is used to receive the control signal, which is used to control the signal transceiver circuit 200 to conduct and work to output an infrared signal (electrical signal);

[0079] The output end of the signal transceiver circuit 200 is connected to a signal input end of the main control circuit 100 and inputs the infrared signal (electrical signal) to the main control circuit 100.

[0080] The main control circuit 100 flips the pulse signal from a low level to a high level according to the feedback infrared signal (electrical signal) to control the motor control circuit 300 to stop working.

[0081] It can be understood that when the signal transceiver circuit 200 is controlled to work, it indicates that the dust collection box is full of dust, and it is necessary to control M2 to stop rotating, so as to clean the dust collection box.

[0082] Using this technical solution, the signal transceiver circuit 200 is relatively simple in design, reducing the number of components. Its detection performance is also relatively accurate and reliable, which can effectively solve the problems that the current dust detection circuit is relatively complex, it is difficult to accurately detect objects in harsh environments, and the detection accuracy of the detection circuit is not high.

[0083] In some embodiments, as Figure 2 shown, in order to ensure the accuracy of dust detection, a switch circuit 220, a transmitting / receiving module 210, and an infrared receiving circuit 230 may be provided in the signal transceiver circuit 200.

[0084] Among them, the signal input end of the switch circuit 220 is coupled to an output end of the main control circuit 100 for receiving a control signal, and the control signal is used to control the switch circuit 220 to conduct, so as to trigger the transmitting / receiving module 210 to work.

[0085] One end of the transmitting / receiving module 210 is connected to the output end of the switch circuit 220, and the switch circuit 220 is used to trigger the transmitting / receiving module 210 to work, so as to output an infrared signal (electrical signal).

[0086] The signal input end of the infrared receiving circuit 230 is connected to the output end of the transmitting / receiving module 210, and is used to receive the infrared signal (electrical signal) and perform voltage division or filtering processing on the infrared signal (electrical signal).

[0087] The output end of the infrared receiving circuit 230 is connected to a signal input end of the main control circuit 100, and outputs the processed infrared signal (electrical signal) to the main control circuit 100.

[0088] In some embodiments, as Figure 2 shown, in order to ensure the accuracy of dust detection, an infrared emitting diode IR1 and a receiving tube REC1 may be provided in the transmitting / receiving module 210. Among them, the infrared emitting diode IR1 is used to emit an infrared signal, and the receiving tube REC1 is used to receive the infrared signal.

[0089] Specifically, the infrared emitting diode IR1 and the receiving tube REC1 are connected in series.

[0090] The power input ends of the infrared emitting diode IR1 and the receiving tube REC1 are connected to the +5V voltage signal terminal, and the +5V voltage signal provides a working power supply for the infrared emitting diode IR1 and the receiving tube REC1.

[0091] One end of the infrared emitting diode IR1 is connected to the output end of the switch circuit 220.

[0092] When the switch circuit 220 is controlled to conduct, the +5V voltage signal triggers the infrared emitting diode IR1 to work, so as to output an infrared signal.

[0093] The receiving diode REC1 is used to receive the infrared signal. Among them,

[0094] The output end of the receiving diode REC1 is connected to the signal input end of the infrared receiving circuit 230, and the received infrared signal is input into the infrared receiving circuit 230.

[0095] In some embodiments, such as Figure 2 as shown, the switch circuit 220 includes a first triode Q201, a tenth resistor R201, an eleventh resistor R202 and a fifth capacitor C201. Among them, the first triode Q201 is selected as an NPN-type triode, which has the function of a switch.

[0096] Specifically, the base of the first triode Q201 is respectively connected to one end of the tenth resistor R201 and the fifth capacitor C201.

[0097] The other end of the tenth resistor R201 is connected to an output end of the main control circuit 100, and the control signal output by the main control circuit 100 is input into the base of the first triode Q201 through the tenth resistor R201.

[0098] The collector of the first triode Q201 is connected to one end of the eleventh resistor R202.

[0099] The other end of the eleventh resistor R202 is connected to the cathode of the infrared emitting diode IR1.

[0100] The emitter of the first triode Q201 and the other end of the fifth capacitor C201 are connected to the common terminal.

[0101] When the input control signal is at a high level, the first triode Q201 is controlled to conduct, and the +5V voltage signal passes through the infrared emitting diode IR1 and the collector-emitter of the first triode Q201 to the common terminal, and the infrared emitting diode IR1 is controlled to conduct and emit an infrared signal.

[0102] In some embodiments, such as Figure 2 as shown, in order to ensure the accuracy of dust detection, a sixth capacitor C202, a twelfth resistor R203, a thirteenth resistor R204, a fourteenth resistor R205 and a seventh capacitor C203 can be provided in the infrared receiving circuit 230.

[0103] Among them, the sixth capacitor C202 is connected in series with the thirteenth resistor R204 and then connected in parallel with the twelfth resistor R203, the fourteenth resistor R205 and the seventh capacitor C203.

[0104] One end of the sixth capacitor C202 and the twelfth resistor R203 is connected to the output terminal (corresponding to the cathode) of the receiving tube REC1.

[0105] One end of the thirteenth resistor R204 is connected to a signal input terminal of the main control circuit 100. The infrared signal received by the receiving tube REC1 is input into the main control circuit 100 through the sixth capacitor C202 and the thirteenth resistor R204. At this time, the main control circuit 100 flips the level of the pulse signal according to the input infrared signal (electrical signal), that is, from low level to high level.

[0106] In some embodiments, such as Figure 1 as shown, in order to ensure the accuracy of infrared signal (electrical signal) processing, a main controller U101 can be set in the main control circuit 100.

[0107] One output terminal of the main controller U101 (corresponding to pins 4, 9, and 10) is respectively connected to the input terminal of the motor control circuit 300, and is used to output a pulse signal, and this pulse signal is used to control the working state of the motor control circuit 300.

[0108] Another output terminal of the main controller U101 (corresponding to pin 11) is connected to the base of the first triode Q201 through the tenth resistor R201, and the output control signal is input into the base of the first triode Q201 through the tenth resistor R201 as a bias signal.

[0109] One input terminal of the main controller U101 (corresponding to pin 12) is coupled to one end of the thirteenth resistor R204, and the infrared signal is input into the main controller U101 through the thirteenth resistor R204.

[0110] The main controller U101 flips the pulse signal from low level to high level according to the feedback infrared signal to control the motor control circuit 300 to stop working.

[0111] In some embodiments, such as Figure 3 as shown, in order to ensure the reliability of the working state switching of the motor M2, a first control branch 310, a second control branch 320, and a third control branch 330 can be set in the motor control circuit 300, and the above control branches are respectively used to control the working state and speed state of the motor M2.

[0112] Among them, the signal input terminal of the first control branch 310 is connected to an output terminal of the main controller U101 (corresponding to pin 9) and is used to receive a pulse signal.

[0113] The power input terminal of the first control branch 310 is connected to the +5V voltage signal terminal.

[0114] The signal input terminal of the second control branch 320 is connected to another output terminal (corresponding to pin 10) of the main controller U101 for receiving another pulse signal.

[0115] The power input terminal of the second control branch 320 is connected to the +5V voltage signal terminal.

[0116] The signal input terminal of the third control branch 330 is connected to the third output terminal (corresponding to pin 4) of the main controller U101 for receiving a third pulse signal.

[0117] The power input terminal of the third control branch 330 is connected to the +5V voltage signal terminal.

[0118] In some embodiments, as Figure 3 shown, the first control branch 310 at least includes a first optocoupler U2A, a first thyristor TR1, and a first spike absorption circuit 311.

[0119] Among them, the input terminal (corresponding to pin 2) of the first optocoupler U2A is connected to an output terminal of the main controller U101 for receiving a pulse signal.

[0120] The power input terminal (corresponding to pin 1) of the first optocoupler U2A is connected to the +5V voltage signal terminal through the fifteenth resistor R301.

[0121] One output terminal (corresponding to pin 6) of the first optocoupler U2A is connected to the first end (corresponding to T2) of the first thyristor TR1.

[0122] The other output terminal (corresponding to pin 4) of the first optocoupler U2A is connected to the control terminal of the first thyristor TR1 through the sixteenth resistor R302.

[0123] The second end (corresponding to T1) of the first thyristor TR1 is connected to one end (corresponding to pin 1) of the motor M2.

[0124] Among them, the input terminal of the first spike absorption circuit 311 is connected to the power supply terminal (corresponding to AC-L), and the output terminal of the first spike absorption circuit 311 is connected to the second end (corresponding to T1) of the first thyristor TR1.

[0125] In some embodiments, as Figure 3 shown, the second control branch 320 at least includes a second optocoupler U2B, a second thyristor TR2, and a second spike absorption circuit 312.

[0126] Among them, the input terminal (corresponding to pin 2) of the second optocoupler U2B is connected to another output terminal (corresponding to pin 9) of the main controller U101 for receiving another pulse signal.

[0127] The power input terminal of the second optocoupler U2B is connected to the +5V voltage signal terminal through the nineteenth resistor R305.

[0128] One output terminal (corresponding to pin 6) of the second optocoupler U2B is connected to the first terminal (corresponding to T2) of the second thyristor TR2.

[0129] The other output terminal (corresponding to pin 4) of the second optocoupler U2B is connected to the control terminal of the second thyristor TR2 through the twentieth resistor R306.

[0130] The second terminal (corresponding to T1) of the second thyristor TR2 is connected to the other end (corresponding to pin 2) of the motor M2.

[0131] Among them, the input terminal of the second absorption spike circuit 312 is connected to the power supply terminal (corresponding to AC-L), and the output terminal of the second absorption spike circuit 312 is connected to the second terminal (corresponding to T1) of the second thyristor TR2.

[0132] In some embodiments, the third control branch 330 at least includes a third optocoupler U2C, a third thyristor TR3, and a third absorption spike circuit 313.

[0133] The input terminal (corresponding to pin 2) of the third optocoupler U2C is connected to the third output terminal (corresponding to pin 10) of the main controller U101 for receiving a third pulse signal.

[0134] The power input terminal of the third optocoupler U2C is connected to the +5V voltage signal terminal through the twenty-third resistor R309.

[0135] One output terminal (corresponding to pin 6) of the third optocoupler U2C is connected to the first terminal (corresponding to T2) of the third thyristor TR3.

[0136] The other output terminal (corresponding to pin 4) of the third optocoupler U2C is connected to the control terminal of the third thyristor TR3 through the twenty-fourth resistor R310.

[0137] The second terminal (corresponding to T1) of the third thyristor TR3 is connected to the third terminal of the motor M2.

[0138] Among them, the input terminal of the third absorption spike circuit 313 is connected to the power supply terminal (corresponding to AC-L), and the output terminal of the third absorption spike circuit 313 is connected to the second terminal (corresponding to T1) of the third thyristor TR3.

[0139] Its working principle is as follows:

[0140] When turning on / off the machine, press the touch switch SW1.

[0141] The output of pin 4 of the main controller U101 is at a low level. The +5V voltage reaches the 23rd resistor R309 and the 1st - 2nd pins of the third optocoupler U2C, and starts to emit infrared rays. After the signals are received at pins 4 and 6, they conduct (low - resistance state).

[0142] The AC_L voltage (220V) passes through pins 4 - 6 of the first optocoupler U2A, the 24th resistor R310, and the 25th resistor R311 to form a trigger voltage for the control terminal of the third thyristor TR3. The 1st - 2nd pins of the third thyristor TR3 start to conduct (low - resistance state).

[0143] The AC_L voltage reaches the 1st - 2nd pins of the third thyristor TR3 and the P4 terminal, and a voltage loop is formed at pin 3. The motor M2 starts to operate at a low gear (low speed).

[0144] For the gear (speed) switching of the motor M2, the tactile switch SW2 is pressed.

[0145] The outputs of pins 9 - 10 of the main controller U101 are at a low level. The +5V voltage reaches the 19th resistor R305, the 15th resistor R301, the 2nd optocoupler U2B, and the 1st - 2nd pins of the third optocoupler U2C, and starts to emit infrared rays. After the signals are received at pins 4 and 6, they conduct (low - resistance state).

[0146] The AC_L voltage (220V) passes through pins 4 and 6 of the 2nd optocoupler U2B and the 3rd optocoupler U2C respectively. The 16th resistor R302, the 17th resistor R303, the 20th resistor R306, and the 21st resistor R307 form a trigger voltage for pin 3 of the first thyristor TR1 and the second thyristor TR2, so that the 1st - 2nd pins of the first thyristor TR1 and the second thyristor TR2 start to conduct (low - resistance state).

[0147] The AC_L voltage reaches the 1st - 2nd pins of the first thyristor TR1 and the second thyristor TR2, and a voltage loop is formed at pin 3 of the P4 terminal. The motor M2 starts to perform gear - switching operation.

[0148] For dust detection, the output of pin 11 of the main controller U101 is at a high level and is input to the base of the first triode Q201 through the 10th resistor R201, providing bias voltage and current for it.

[0149] The infrared emitting diode IR1 starts to work. When the dust collection box accumulates or reaches a certain amount, after the receiving tube REC1 receives the infrared rays, it is ready to send a signal to pin 12 of the main controller U101. The main controller U101 performs gear - switching of the motor M2. When the dust collection box is full of dust, the outputs of pins 4, 9, and 10 of the main controller U101 are at a high level, and the motor M2 starts to stop working.

[0150] Among them, LED1, LED2, and LED3 are lit, indicating that the dust box is full and the dust box should be collected in time.

[0151] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. All of these are within the protection scope of the present invention.

Claims

1. An infrared tube dust detection control circuit, characterized in that: have: A main control circuit, which is arranged in the dust control circuit and is used to output a pulse signal; a motor control circuit, whose input end is connected to an output end of the main control circuit and is used to receive the pulse signal, and the motor control circuit controls the working state of the motor through the input pulse signal; A signal transceiver circuit, whose signal input terminal is coupled to an output terminal of the main control circuit, is used to receive a control signal to control the operation of the signal transceiver circuit to output an infrared signal; The output end of the signal transceiver circuit is connected to a signal input end of the main control circuit. The main control circuit flips the pulse signal to a high level according to the feedback infrared signal to control the motor control circuit to stop working.

2. The infrared tube dust detection control circuit according to claim 1, characterized in that: The signal transceiver circuit includes a switch circuit, a transmitting / receiving module and an infrared receiving circuit. The switch circuit signal input terminal is coupled to an output terminal of the main control circuit, and is used to receive a control signal to control the switch circuit to be turned on; One end of the transmitting / receiving module is connected to the output end of the switching circuit, and the switching circuit is used to trigger the transmitting / receiving module to work so as to output the infrared signal; The signal input end of the infrared receiving circuit is connected to the output end of the transmitting / receiving module for receiving the infrared signal. The output end of the infrared receiving circuit is connected to a signal input end of the main control circuit.

3. The infrared tube dust detection control circuit according to claim 2, characterized in that: The transmitting / receiving module includes an infrared transmitting tube and a receiving tube connected in series, wherein: The power input terminals of the infrared transmitting tube and the receiving tube are connected to the +5V voltage signal terminal. One end of the infrared emitting tube is connected to the output end of the switch circuit. When the switch circuit is controlled to be turned on, the +5V voltage signal triggers the infrared emitting tube to work, so as to output the infrared signal. The receiving tube is used to receive the infrared signal, wherein: The output end of the receiving tube is connected to the signal input end of the infrared receiving circuit.

4. The infrared tube dust detection control circuit according to claim 3, characterized in that: The switch circuit includes a first transistor, a tenth resistor, an eleventh resistor and a fifth capacitor. The base of the first transistor is connected to one end of the tenth resistor and one end of the fifth capacitor respectively. The other end of the tenth resistor is connected to an output end of the main control circuit for receiving the control signal. The collector of the first transistor is connected to one end of the eleventh resistor. The other end of the eleventh resistor is connected to the cathode of the infrared emitting tube. The emitter of the first transistor and the other end of the fifth capacitor are connected to a common end. When the input control signal is at a high level, the first transistor is controlled to be turned on, and the +5V voltage signal is transmitted through the infrared emitting tube and the collector-emitter of the first transistor to the common terminal.

5. The infrared tube dust detection control circuit according to claim 4, characterized in that: The infrared receiving circuit includes a sixth capacitor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor and a seventh capacitor. The sixth capacitor is connected in series with the thirteenth resistor and then connected in parallel with the twelfth resistor, the fourteenth resistor and the seventh capacitor. One end of the sixth capacitor and the twelfth resistor is connected to the output end of the receiving tube, One end of the thirteenth resistor is connected to a signal input end of the main control circuit.

6. The infrared tube dust detection control circuit according to any one of claims 2 to 5, characterized in that: The main control circuit at least includes a main controller, An output terminal of the main controller is connected to an input terminal of the motor control circuit for outputting the pulse signal. Another output terminal of the main controller is connected to the base of the first transistor for outputting the control signal. An input end of the main controller is coupled to one end of the thirteenth resistor for receiving the infrared signal and flipping the pulse signal to a high level according to the feedback infrared signal to control the motor control circuit to stop working.

7. The infrared tube dust detection control circuit according to claim 6, characterized in that: The motor control circuit includes a first control branch, a second control branch and a third control branch. The signal input end of the first control branch is connected to an output end of the main controller for receiving a pulse signal. The power input terminal of the first control branch is connected to the +5V voltage signal terminal, The signal input end of the second control branch is connected to another output end of the main controller for receiving another pulse signal. The power input terminal of the second control branch is connected to the +5V voltage signal terminal. The signal input end of the third control branch is connected to the third output end of the main controller for receiving a third pulse signal. The power input terminal of the third control branch is connected to the +5V voltage signal terminal.

8. The infrared tube dust detection control circuit according to claim 7, characterized in that: The first control branch at least includes a first photocoupler and a first thyristor. The input end of the first photoelectric coupler is connected to an output end of the main controller for receiving a pulse signal. The power input terminal of the first photocoupler is connected to the +5V voltage signal terminal, An output terminal of the first photocoupler is connected to a first terminal of the first thyristor, The other output terminal of the first photocoupler is connected to the control terminal of the first thyristor, The second end of the first thyristor is connected to one end of the motor.

9. The infrared tube dust detection control circuit according to claim 7, characterized in that: The second control branch at least includes a second photocoupler and a second thyristor. The input end of the second photoelectric coupler is connected to another output end of the main controller for receiving another pulse signal. The power input terminal of the second photocoupler is connected to the +5V voltage signal terminal. An output terminal of the second photocoupler is connected to a first terminal of the second thyristor, The other output terminal of the second photocoupler is connected to the control terminal of the second thyristor. The second end of the second thyristor is connected to the other end of the motor.

10. The infrared tube dust detection control circuit according to claim 7, characterized in that: The third control branch at least includes a third photocoupler and a third thyristor. The input end of the third photoelectric coupler is connected to the third output end of the main controller for receiving a third pulse signal. The power input terminal of the third photoelectric coupler is connected to the +5V voltage signal terminal, An output terminal of the third photocoupler is connected to a first terminal of the third thyristor, The other output terminal of the third photocoupler is connected to the control terminal of the third thyristor. The second end of the third thyristor is connected to the third end of the motor.

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