A main control system of a smoke exhaust machine and a control method thereof

Abstract

The application discloses a main machine control system of a smoke exhaust machine and a control method thereof, wherein the control system comprises a control module, a variable frequency fan module, a display module, an input module, a temperature and humidity module and a heat dissipation and dehumidification module, and the variable frequency fan module, the display module, the input module, the temperature and humidity module and the heat dissipation and dehumidification module are connected with the control module. When the application is used, the input module transmits system configuration parameters to the control module, the control module controls parameters to be displayed through the display module, the display module can display the rotating speed of the fan, the working state of each load and the like, and the control module adjusts the state of the variable frequency fan module according to the parameters; at the same time, the temperature and humidity module detects the temperature and humidity of the main machine and transmits the same to the control module, and the control module controls the working state of the heat dissipation and dehumidification module according to the temperature and humidity of the main machine; the application enhances the reliability of the main machine control system through the mode, so that the main machine control system can stably operate under different environments and working conditions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of smoke exhaust machine, and particularly relates to a main machine control system of smoke exhaust machine and a control method thereof. BACKGROUND

[0002] In the smoke exhaust machine system, the main machine is generally placed on the top of a high-rise building, and is greatly affected by outdoor temperature and humidity. In extreme environments, the normal movement of each function needs to be guaranteed, including wireless communication with each floor terminal, control of the main machine variable frequency fan and reliable operation under abnormal working conditions.

[0003] As the core equipment of the smoke exhaust machine, the main machine connects the linkage work of the whole system. It is necessary to design the main machine electric control system for reliability. SUMMARY

[0004] In order to solve the above problems, the application provides a main machine control system of smoke exhaust machine, which can guarantee the stable operation of the system in different environments and has high reliability.

[0005] Another object of the application is to provide a main machine control method of smoke exhaust machine.

[0006] The technical scheme adopted by the application is as follows:

[0007] A main machine control system of smoke exhaust machine comprises a control module, a variable frequency fan module, a display module, an input module, a temperature and humidity module and a heat dissipation and dehumidification module, wherein the variable frequency fan module, the display module, the input module, the temperature and humidity module and the heat dissipation and dehumidification module are connected with the control module.

[0008] The input module transmits system configuration parameters to the control module, the control module controls the parameters to be displayed through the display module, and adjusts the state of the variable frequency fan module according to the parameters; the temperature and humidity module detects the temperature and humidity of the main machine and transmits them to the control module, and the control module controls the working state of the heat dissipation and dehumidification module according to the temperature and humidity of the main machine.

[0009] Preferably, the control system further comprises an oil fume purification module connected with the control module for purifying the oil fume of the main machine.

[0010] Preferably, the control system further comprises a wireless communication module connected with the control module for uploading the temperature and humidity detected by the temperature and humidity module to the cloud to realize the monitoring of the main machine.

[0011] Preferably, the display module comprises an LED lamp group for displaying the working state of each load and a digital tube for displaying the temperature and humidity of the main machine and / or the rotating speed of the fan; the LED lamp group comprises a plurality of LED lamps, and the number of the LED lamps corresponds to the number of the loads.

[0012] Preferably, the input module comprises a first key KEY1, a second key KEY2, a third key KEY3 and a fourth key KEY4, the first key KEY1 is connected with the thirty-fourth resistor R34 in one way and the thirty-eighth resistor R38 in another way, the second key KEY2 is connected with the thirty-third resistor R33 in one way and the thirty-seventh resistor R37 in another way, the third key KEY3 is connected with the thirty-second resistor R32 in one way and the thirty-sixth resistor R36 in another way, the fourth key KEY4 is connected with the thirty-first resistor R31 in one way and the thirty-fifth resistor R35 in another way, the thirty-fourth resistor R34, the thirty-third resistor R33, the thirty-second resistor R32 and the thirty-first resistor R31 are connected with +5V.

[0013] Preferably, the frequency conversion fan module comprises a second chip U2, the first pin of the second chip U2 is connected with the eighth resistor R8 in one way and the ninth resistor R9 in another way, the second pin of the second chip U2 is connected with the seventh resistor R7 in one way and the tenth resistor R10 in another way, the third pin of the second chip U2 is connected with the sixth resistor R6 in one way and the eleventh resistor R11 in another way, the fourth pin of the second chip U2 is connected with the fifth resistor R5 in one way and the twelfth resistor R12 in another way, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are connected with +5V, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11 and the twelfth resistor R12 respectively communicate with the frequency converter CN3 through the control ports 485_RX, 485_RE, 485_DE and 485_TX to realize the control of the rotating speed of the frequency conversion fan.

[0014] Preferably, the temperature and humidity module comprises a sixth chip CN6, the first pin of the sixth chip CN6 is grounded, the second pin of the sixth chip CN6 is connected with one end of the three hundred and first resistor R301 in one way and one end of the three hundred and fourth resistor R304 in another way, the third pin of the sixth chip CN6 is connected with one end of the three hundred and second resistor R302 in one way and one end of the three hundred and third resistor R303 in another way, the fourth pin of the sixth chip CN6 is connected with the other end of the three hundred and first resistor R301 and the other end of the three hundred and second resistor R302 with +5V, the other end of the three hundred and fourth resistor R304 is connected with one end of the three hundred and first capacitor C301, the other end of the three hundred and third resistor R303 is connected with one end of the three hundred and second capacitor C302, the other end of the three hundred and first capacitor C301 and the other end of the three hundred and second capacitor C302 are grounded.

[0015] Preferably, the heat dissipation and dehumidification module comprises a seventh chip CN7, a first pin of the seventh chip CN7 is connected with a base of a third transistor Q3 through a forty-fifth resistor R45, a collector of the third transistor Q3 is connected with +5V through a forty-third resistor R43, and is connected with one end of a forty-fourth resistor R44 in another way, the other end of the forty-fourth resistor R44 is connected with an emitter of the third transistor Q3 through a first capacitor C1; one way of the first pin of the seventh chip CN7 is connected with one end of the first capacitor EC1, the other end of the first capacitor EC1 is connected with a second pin of the seventh chip CN7 and one end of a first inductor L1 respectively, the other end of the first inductor L1 is connected with one end of a first diode D1 and a collector of a second transistor Q2 respectively, the base of the second transistor Q2 is connected with one end of a thirty-ninth resistor R39, the other end of the first diode D1 and the emitter of the second transistor Q2 are connected with the other end of the thirty-ninth resistor R39 in common to 12V; the heat dissipation and dehumidification module further comprises a first transistor Q1, the emitter of the first transistor Q1 is connected with the collector of the second transistor Q2 in one way through a second diode D2, and is connected with the base of the first transistor Q1 in another way through a forty-second resistor R42, the collector of the first transistor Q1 is further connected with the base of the second transistor Q2 and the thirty-ninth resistor R39 through a fourth zero resistor R40, and the base of the first transistor Q1 is connected with a PWM signal through a forty-first resistor R41.

[0016] Preferably, the oil fume purification module comprises an eighth chip CN8, the eighth chip CN8 is connected with a relay RY1, the relay RY1 is further connected with +12V through a forty-eighth resistor R48, the relay RY1 is further connected with a collector of a fourth transistor Q4, one way of a base of the fourth transistor Q4 is connected with one end of a forty-sixth resistor R46, another way is connected with one end of a forty-seventh resistor R47, the other end of the forty-sixth resistor R46 is connected with a port Relay1, and the other end of the forty-seventh resistor R47 is connected with an emitter of the fourth transistor Q4 in common to ground.

[0017] A main machine control method of a smoke exhaust machine, which applies the main machine control system of the smoke exhaust machine, and is implemented according to the following steps:

[0018] S1, the temperature and humidity module detects the temperature and humidity in the main machine, and transmits the detected temperature value and humidity value to the control module;

[0019] S2, the control module controls the working state of the heat dissipation and dehumidification module according to the temperature value and humidity value.

[0020] Preferably, in the S2, the control module controls the working state of the heat dissipation and dehumidification module according to the temperature value, and specifically:

[0021] When T≥30℃ is established, the fan in the heat dissipation and dehumidification module is controlled to dissipate heat at a speed of 1000 rpm; when 50℃≤T<70℃ is established, the fan in the heat dissipation and dehumidification module is controlled to dissipate heat at a speed of 2000 rpm; when 90℃≤T<90℃ is established, the fan is controlled to dissipate heat at a speed of 3000 rpm; when T≥90℃ is established, the fan is controlled to dissipate heat at a speed of 3000 rpm, and the frequency conversion fan is controlled to run at the lowest speed to reduce the heat generated inside the main machine; wherein T is the detected temperature value.

[0022] Preferably, the control module in S2 controls the working state of the heat dissipation and dehumidification module according to the humidity value, specifically:

[0023] When W≥60% is established, the fan in the heat dissipation and dehumidification module is controlled to dissipate heat at a speed of 1000 rpm; when 70%≤W<80% is established, the fan in the heat dissipation and dehumidification module is controlled to dissipate heat at a speed of 2000 rpm; when 80%≤W<90% is established, the fan is controlled to dissipate heat at a speed of 3000 rpm; when W≥90% is established, the control module cuts off the power supply of the main machine; wherein W is the detected humidity value.

[0024] Compared with the prior art, when the present application is used, the input module transmits system configuration parameters to the control module, the control module controls the parameters to be displayed through the display module, the display module can display the speed of the fan, the working state of each load, etc., and the control module adjusts the state of the frequency conversion fan module according to the parameters; at the same time, the temperature and humidity module detects the temperature and humidity of the main machine and transmits them to the control module, and the control module controls the working state of the heat dissipation and dehumidification module according to the temperature and humidity of the main machine; the present application enhances the reliability of the main machine control system in this way, so that it can stably run under different environments and working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a system block diagram of a main machine control system of a set of exhaust fans provided by embodiment 1 of the present application;

[0026] Figure 2a is a circuit diagram of an LED lamp group in a main machine control system of a set of exhaust fans provided by embodiment 1 of the present application;

[0027] Figure 2b is a circuit diagram of a digital tube in a main machine control system of a set of exhaust fans provided by embodiment 1 of the present application;

[0028] Figure 3 is a circuit diagram of an input module in a main machine control system of a set of exhaust fans provided by embodiment 1 of the present application;

[0029] Figure 4is a circuit diagram of a variable frequency fan module in a main control system of a smoke exhaust machine provided by embodiment 1 of the present application;

[0030] Figure 5 is a circuit diagram of a temperature and humidity module in a main control system of a smoke exhaust machine provided by embodiment 1 of the present application;

[0031] Figure 6 is a circuit diagram of a heat dissipation and dehumidification module in a main control system of a smoke exhaust machine provided by embodiment 1 of the present application;

[0032] Figure 7 is a circuit diagram of an oil fume purification module in a main control system of a smoke exhaust machine provided by embodiment 1 of the present application;

[0033] Figure 8 is a flow chart of a main control method of a smoke exhaust machine provided by embodiment 2 of the present application.

[0034] Wherein: 1. Control module, 2. Variable frequency fan module, 3. Display module, 4. Input module, 5. Temperature and humidity module, 6. Heat dissipation and dehumidification module, 7. Oil fume purification module, 8. Wireless communication module, 31. LED lamp group, 32. Digital tube. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] In the description of the present application, it should be clear that the terms "vertical", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not mean that the device or element referred to must have a particular orientation or position, and therefore cannot be understood as a limitation on the present application.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Embodiment 1

[0039] Embodiment 1 of the present application provides a main control system of a smoke exhaust machine, asFigure 1 As shown, it comprises a control module 1, a variable frequency fan module 2, a display module 3, an input module 4, a temperature and humidity module 5 and a heat dissipation and dehumidification module 6, wherein the variable frequency fan module 2, the display module 3, the input module 4, the temperature and humidity module 5 and the heat dissipation and dehumidification module 6 are connected with the control module 1;

[0040] In this way, by using the above structure, the input module 4 transmits system configuration parameters to the control module 1, the control module 1 controls the parameters to be displayed through the display module 3, and adjusts the state of the variable frequency fan module 2 according to the parameters; the temperature and humidity module 5 detects the temperature and humidity of the host and transmits it to the control module 1, and the control module 1 controls the working state of the heat dissipation and dehumidification module 6 according to the temperature and humidity of the host;

[0041] In this way, by using the above structure, the input module 4 transmits system configuration parameters to the control module 1, the control module 1 controls the parameters to be displayed through the display module 3, and adjusts the state of the variable frequency fan module 2 according to the parameters; the temperature and humidity module 5 detects the temperature and humidity of the host and transmits it to the control module 1, and the control module 1 controls the working state of the heat dissipation and dehumidification module 6 according to the temperature and humidity of the host;

[0042] In specific embodiments, the control module 1 comprises a chip with model SH32F9001.

[0043] More specifically, the control system further comprises an oil fume purification module 7 connected with the control module 1 for purifying the oil fume of the host;

[0044] In this way, when a large amount of oil stains is collected on the host, the oil fume purification module 7 can be used for purification; of course, the oil fume purification module 7 can also be started regularly.

[0045] More specifically, the control system further comprises a wireless communication module 8 connected with the control module 1 for uploading the temperature and humidity detected by the temperature and humidity module 5 to the cloud to realize monitoring of the host;

[0046] In this way, in combination with the wireless communication module 8, the control module 1 can upload the read internal temperature and humidity value of the host to the cloud in real time to realize real-time monitoring of the temperature and humidity inside the host of the smoke exhaust machine.

[0047] In specific embodiments:

[0048] The display module 3 comprises an LED lamp group 31 for displaying the working state of each load and a digital tube 32 for displaying the temperature and humidity of the host and / or the fan speed; the LED lamp group 31 comprises a plurality of LED lamps, and the number of the LED lamps corresponds to the number of the loads;

[0049] More specifically, as Figure 2a and 2bAs shown, the display module 3 consists of 6 LEDs (control ports are LED1-LED6) and 4 digital tubes (control ports are SEG1-SEG8, COM1-COM4). The LEDs can indicate the working status of each load, and the digital tubes can display time, working mode, fan speed, system configuration information, etc.

[0050] In a specific embodiment:

[0051] like Figure 3 As shown, the input module 4 includes a first button KEY1, a second button KEY2, a third button KEY3, and a fourth button KEY4. The first button KEY1 is connected to the thirty-fourth resistor R34 in one path and to the thirty-eighth resistor R38 in the other path. The second button KEY2 is connected to the thirty-third resistor R33 in one path and to the thirty-seventh resistor R37 in the other path. The third button KEY3 is connected to the thirty-second resistor R32 in one path and to the thirty-sixth resistor R36 in the other path. The fourth button KEY4 is connected to the thirty-first resistor R31 in one path and to the thirty-fifth resistor R35 in the other path. The thirty-fourth resistor R34, the thirty-third resistor R33, the thirty-second resistor R32, and the thirty-first resistor R31 are all connected to +5V.

[0052] In a specific embodiment:

[0053] like Figure 4 As shown, the variable frequency fan module 2 includes a second chip U2. One pin of the second chip U2 is connected to the eighth resistor R8, and the other pin is connected to the ninth resistor R9. One pin of the second chip U2 is connected to the seventh resistor R7, and the other pin is connected to the tenth resistor R10. One pin of the second chip U2 is connected to the sixth resistor R6, and the other pin is connected to the eleventh resistor R11. One pin of the second chip U2 is connected to the fifth resistor R5, and the other pin is connected to the twelfth resistor R12. The fifth resistor R5, sixth resistor R6, seventh resistor R7, and eighth resistor R8 are all connected to +5V. The ninth resistor R9, tenth resistor R10, eleventh resistor R11, and twelfth resistor R12 communicate serially with the frequency converter CN3 through control ports 485_RX, 485_RE, 485_DE, and 485_TX respectively to control the speed of the variable frequency fan.

[0054] More specifically, the second chip U2 is model RS485; CN3 is the inverter interface terminal;

[0055] Thus, taking RS485 signal conversion chip as the core, mutual conversion between TTL signal and RS485 signal is realized, CN3 is a frequency converter interface terminal, and the MCU performs serial communication with the frequency converter through control ports 485_TX, 485_DE, 485_RE and 485_RX, so as to realize control on the rotating speed of the frequency conversion fan.

[0056] In specific embodiments,

[0057] As shown in Figure 5 The temperature and humidity module 5 includes a sixth chip CN6, a first pin of the sixth chip CN6 is grounded, a second pin of the sixth chip CN6 is connected with one end of a third 301 resistor R301 in one way and with one end of a third 304 resistor R304 in another way, a third pin of the sixth chip CN6 is connected with one end of a third 302 resistor R302 in one way and with one end of a third 303 resistor R303 in another way, a fourth pin of the sixth chip CN6 is connected with the other end of the third 301 resistor R301 and the other end of the third 302 resistor R302 to +5V, the other end of the third 304 resistor R304 is connected with one end of a third 301 capacitor C301, the other end of the third 303 resistor R303 is connected with one end of a third 302 capacitor C302, and the other end of the third 301 capacitor C301 and the other end of the third 302 capacitor C302 are grounded.

[0058] More specifically, the sixth chip CN6 is a terminal of the temperature and humidity module.

[0059] Thus, the control module 1 and the temperature and humidity module 5 perform temperature value and humidity value reading through I 2 C (i.e. control SDA and SCL terminals) communication mode.

[0060] In specific embodiments,

[0061] As shown in Figure 6As shown, the heat dissipation and dehumidification module 2 comprises a seventh chip CN7, a first pin of the seventh chip CN7 is connected with a base of a third transistor Q3 through a forty-fifth resistor R45, a collector of the third transistor Q3 is connected with +5V through a forty-third resistor R43, and the other end of the third transistor Q3 is connected with one end of a forty-fourth resistor R44, the other end of the forty-fourth resistor R44 is connected with an emitter of the third transistor Q3 through a first capacitor C1; one end of the first capacitor EC1 is connected with a second pin of the seventh chip CN7, the other end of the first capacitor EC1 is connected with a first inductor L1 and a second transistor Q2 respectively, the other end of the first inductor L1 is connected with a first diode D1 and a collector of the second transistor Q2 respectively, a base of the second transistor Q2 is connected with one end of a thirty-ninth resistor R39, the other end of the first diode D1 and an emitter of the second transistor Q2 are connected with the other end of the thirty-ninth resistor R39 and are connected with 12V; the heat dissipation and dehumidification module 2 further comprises a first transistor Q1, an emitter of the first transistor Q1 is connected with the collector of the second transistor Q2 through a second diode D2 in one way, and is connected with a base of the first transistor Q1 through a forty-second resistor R42 in the other way, a collector of the first transistor Q1 is further connected with the base of the second transistor Q2 and the thirty-ninth resistor R39 through a fourth resistor R40, and a base of the first transistor Q1 is connected with a PWM signal through a forty-first resistor R41.

[0062] More specifically, the seventh chip CN7 is a fan terminal.

[0063] In this way, the control module 1 outputs PWM signals with different duty cycles to control the voltage of the fan (i.e. the voltage of the FAN after being shaped by the first transistor Q1 and the second transistor Q2), specifically, the duty cycle of 0%-100% corresponds to the voltage of 0V-12V of the fan, the higher the voltage, the faster the speed of the fan (the highest speed is 3000rpm), and the fan rotates at the same time to generate an RFG square wave signal, and the control module 1 calculates the actual speed of the fan by detecting the square wave at the PCA end (i.e. the square wave after being shaped by the third transistor Q3).

[0064] Therefore, the control module 1 detects the PCA signal to know the speed of the fan, thereby adjusting the duty cycle of the PWM to adjust the speed of the fan, and realizes the closed-loop control of the speed of the fan.

[0065] In specific embodiments:

[0066] For example, Figure 7As shown, the oil fume purification module 7 comprises an eighth chip CN8, the eighth chip CN8 is connected with a relay RY1, the relay RY1 is also connected with +12V through a forty-eighth resistor R48, the relay RY1 is also connected with the collector of a fourth transistor Q4, one way of the base of the fourth transistor Q4 is connected with one end of a forty-sixth resistor R46, another way is connected with one end of a forty-seventh resistor R47, the other end of the forty-sixth resistor R46 is connected with a port Relay1, the other end of the forty-seventh resistor R47 is connected with the emitter of the fourth transistor Q4 and is grounded in common;

[0067] More specifically, the eighth chip CN8 is an oil fume purifier terminal;

[0068] In this way, when the control module 1 controls the Relay1 end to be high level, the fourth transistor Q4 is turned on, the relay RY1 is attracted to make RE1_1 and RE1_2 connect to turn on the eighth chip CN8, and vice versa, when the control module 1 controls the Relay1 end to be low level, the fourth transistor Q4 is cut off, the relay RY1 is released to disconnect RE1_1 and RE1_2 to turn off the eighth chip CN8.

[0069] The host control system of the central exhaust hood provided by the embodiment has the following working process:

[0070] The user realizes the input of system configuration information parameters through the input module 4;

[0071] The control module 1 adjusts the state of the variable frequency fan module 2 according to the input information; at the same time, the parameters are displayed through the display module 3; the displayable parameters include the working and non-working states of each load, and the digital tube can display time, working mode, fan speed, system configuration information and the like;

[0072] In the process of running the central exhaust hood, when more oil stains are collected on the host, the oil fume purification module 7 can be used for purification; of course, the oil fume purification module 7 can also be started regularly;

[0073] In the process of running the central exhaust hood, the control module 1 and the temperature and humidity module 5 communicate through the I 2 C (i.e. control SDA and SCL) communication mode to read the temperature value and the humidity value, and control the working state of the heat dissipation and dehumidification module 2 according to the reading result;

[0074] In addition, the central exhaust hood control system provided by the embodiment combines the wireless communication module 8, the control module 1 can upload the read internal temperature and humidity value of the host to the cloud in real time, so as to realize real-time monitoring of the internal temperature and humidity of the central exhaust hood host.

[0075] Embodiment 2

[0076] The host control method of the central exhaust hood provided by the embodiment 2 is as follows:Figure 8 As shown, the main control system of the smoke exhaust machine of application example 1 is implemented according to the following steps:

[0077] S1, the temperature and humidity module 5 detects the temperature and humidity in the main machine, and transmits the detected temperature value and humidity value to the control module 1;

[0078] S2, the control module 1 controls the working state of the heat dissipation and dehumidification module 6 according to the temperature value and humidity value.

[0079] In S2, the control module controls the working state of the heat dissipation and dehumidification module 6 according to the temperature value, specifically:

[0080] When T≥30℃ is established, control the fan in the heat dissipation and dehumidification module 6 to dissipate heat at 1000rpm; when 50℃≤T<70℃ is established, control the fan in the heat dissipation and dehumidification module 6 to dissipate heat at 2000rpm; when 90℃≤T<90℃ is established, control the fan to dissipate heat at 3000rpm; when T≥90℃ is established, control the fan to dissipate heat at 3000rpm, and control the variable frequency fan to run at the lowest speed to reduce the heat generated inside the main machine; wherein T is the detected temperature value.

[0081] Among them, when T≥90℃ is established, control the fan to dissipate heat at 3000rpm, and control the variable frequency fan to run at the lowest speed to reduce the heat generated inside the main machine, to ensure that the internal temperature of the main machine is within the normal working temperature range.

[0082] In S2, the control module controls the working state of the heat dissipation and dehumidification module 6 according to the humidity value, specifically:

[0083] When W≥60% is established, control the fan in the heat dissipation and dehumidification module 6 to perform air cooling and dehumidification at 1000rpm; when 70%≤W<80% is established, control the fan in the heat dissipation and dehumidification module 6 to perform air cooling and dehumidification at 2000rpm; when 80%≤W<90% is established, control the fan to perform air cooling and dehumidification at 3000rpm; when W≥90% is established, the control module 1 cuts off the power supply of the main machine; wherein W is the detected humidity value.

[0084] Among them, when W≥90% is established, it means that the internal humidity of the main machine is serious, in order to ensure safety, the control module 1 cuts off the power supply of the main machine to avoid accidents.

[0085] In addition, the control method provided by the embodiment further comprises:

[0086] Periodically start the oil fume purification module 7 to purify the oil fume on the main machine, to avoid excessive oil dirt affecting the performance of the main machine.

[0087] The embodiment has high reliability of the smoke exhaust machine by monitoring and adjusting the temperature and humidity of the host in real time and cleaning the attached oil stains periodically, so that the working condition does not affect the smoke exhaust machine.

[0088] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A main control system of a smoke exhaust unit, characterized by, It includes control module (1), variable frequency fan module (2), display module (3), input module (4), temperature and humidity module (5), heat dissipation and dehumidification module (6) and oil fume purification module (7), the variable frequency fan module (2), display module (3), input module (4), temperature and humidity module (5), heat dissipation and dehumidification module (6) and oil fume purification module (7) are all connected with control module (1); The input module (4) transmits system configuration parameters to the control module (1), the control module (1) controls the parameters to be displayed through the display module (3), and adjusts the state of the variable frequency fan module (2) according to the parameters; the temperature and humidity module (5) detects the host temperature and humidity and transmits it to the control module (1), and the control module (1) controls the working state of the heat dissipation and dehumidification module (6) according to the host temperature and humidity; The oil fume purification module (7) is used for purifying the oil fume of the host, and the oil fume purification module (7) includes an eighth chip CN8, the eighth chip CN8 is connected with a relay RY1, the relay RY1 is also connected with +12V through the forty-eighth resistor R48, the relay RY1 is also connected with the collector of the fourth transistor Q4, one way of the base of the fourth transistor Q4 is connected with one end of the forty-sixth resistor R46, and the other way is connected with one end of the forty-seventh resistor R47, the other end of the forty-sixth resistor R46 is connected with the port Relay1, and the other end of the forty-seventh resistor R47 is connected with the emitter of the fourth transistor Q4 and grounded; The heat dissipation and dehumidification module (6) includes a seventh chip CN7, the first pin of the seventh chip CN7 is connected with the base of the third transistor Q3 through the forty-fifth resistor R45, the collector of the third transistor Q3 is connected with +5V through the forty-third resistor R43 in one way, and is connected with one end of the forty-fourth resistor R44 in the other way, the other end of the forty-fourth resistor R44 is connected with the emitter of the third transistor Q3 through the first capacitor C1; the first pin of the seventh chip CN7 is connected with one end of the first capacitor EC1 in one way, the other end of the first capacitor EC1 is connected with the second pin of the seventh chip CN7 and one end of the first inductor L1 respectively, the other end of the first inductor L1 is connected with one end of the first diode D1 and the collector of the second transistor Q2 respectively, the base of the second transistor Q2 is connected with one end of the thirty-ninth resistor R39, the other end of the first diode D1 and the emitter of the second transistor Q2 are connected with the other end of the thirty-ninth resistor R39 and grounded; further comprising a first transistor Q1, the emitter of the first transistor Q1 is connected with the collector of the second transistor Q2 through the second diode D2 in one way, and is connected with the base of the first transistor Q1 through the forty-second resistor R42 in the other way, the collector of the first transistor Q1 is also connected with the base of the second transistor Q2 and the thirty-ninth resistor R39 through the fortieth resistor R40, and the base of the first transistor Q1 is connected with PWM signal through the forty-first resistor R41.

2. A main control system of a smoke exhaust unit according to claim 1, characterized in that, The control system further comprises a wireless communication module (8) connected with the control module (1) for uploading the temperature and humidity detected by the temperature and humidity module (5) to the cloud to realize the monitoring of the host.

3. A main control system of a smoke exhaust unit according to claim 1 or 2, characterized in that The display module (3) comprises an LED lamp group (31) for displaying the working states of the loads and a digital tube (32) for displaying the temperature and humidity of the host and / or the rotating speed of the fan; the LED lamp group (31) comprises a plurality of LED lamps, and the number of the LED lamps corresponds to the number of the loads.

4. A main control system of a smoke exhaust unit according to claim 3, wherein The input module (4) comprises a first button KEY1, a second button KEY2, a third button KEY3 and a fourth button KEY4; the first button KEY1 is connected with the thirty-fourth resistor R34 at one end and the thirty-eighth resistor R38 at the other end; the second button KEY2 is connected with the thirty-third resistor R33 at one end and the thirty-seventh resistor R37 at the other end; the third button KEY3 is connected with the thirty-second resistor R32 at one end and the thirty-sixth resistor R36 at the other end; the fourth button KEY4 is connected with the thirty-first resistor R31 at one end and the thirty-fifth resistor R35 at the other end; and the thirty-fourth resistor R34, the thirty-third resistor R33, the thirty-second resistor R32 and the thirty-first resistor R31 are connected with +5V.

5. A main control system of a smoke exhaust unit according to claim 1, characterized in that, The frequency conversion fan module (2) comprises a second chip U2; the first pin of the second chip U2 is connected with the eighth resistor R8 at one end and the ninth resistor R9 at the other end; the second pin of the second chip U2 is connected with the seventh resistor R7 at one end and the tenth resistor R10 at the other end; the third pin of the second chip U2 is connected with the sixth resistor R6 at one end and the eleventh resistor R11 at the other end; the fourth pin of the second chip U2 is connected with the fifth resistor R5 at one end and the twelfth resistor R12 at the other end; the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are connected with +5V; and the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11 and the twelfth resistor R12 respectively pass through the control ports 485_RX, 485_RE, 485_DE and 485_TX to realize the serial port communication with the frequency converter CN3 to control the rotating speed of the frequency conversion fan.

6. A main control system of a smoke exhaust unit according to claim 1 or 5, characterized in that, The temperature and humidity module (5) comprises a sixth chip CN6, a first pin of the sixth chip CN6 is grounded, a second pin of the sixth chip CN6 is connected with one end of a third hundred and one resistor R301 in one way and with one end of a third hundred and four resistor R304 in another way, a third pin of the sixth chip CN6 is connected with one end of a third hundred and two resistor R302 in one way and with one end of a third hundred and three resistor R303 in another way, a fourth pin of the sixth chip CN6 is connected with the other end of the third hundred and one resistor R301 and the other end of the third hundred and two resistor R302 to +5V, the other end of the third hundred and four resistor R304 is connected with one end of a third hundred and one capacitor C301, the other end of the third hundred and three resistor R303 is connected with one end of a third hundred and two capacitor C302, and the other end of the third hundred and one capacitor C301 and the other end of the third hundred and two capacitor C302 are grounded.

7. A main unit control method of a smoke exhaust system, characterized by comprising: The application discloses a main machine control system of a smoke exhaust machine, and particularly relates to the following steps. S1, the temperature and humidity module (5) detects the temperature and humidity in the main machine, and transmits the detected temperature value and humidity value to the control module (1); S2, the control module (1) controls the working state of the heat dissipation and dehumidification module (6) according to the temperature value and humidity value, specifically as follows: when T>=30℃, the fan in the heat dissipation and dehumidification module (6) is controlled to rotate at 1000rpm to dissipate heat; when 50℃<=T<70℃, the fan in the heat dissipation and dehumidification module (6) is controlled to rotate at 2000rpm to dissipate heat; when 70℃<=T<90℃, the fan is controlled to rotate at 3000rpm to dissipate heat; and when T>=90℃, the fan is controlled to rotate at 3000rpm to dissipate heat, and the frequency conversion fan is controlled to rotate at the lowest speed to reduce the heat generated in the main machine; wherein T is the detected temperature value; when W>=60%, the fan in the heat dissipation and dehumidification module (6) is controlled to rotate at 1000rpm to perform air cooling and dehumidification; when 70%<=W<80%, the fan in the heat dissipation and dehumidification module (6) is controlled to rotate at 2000rpm to perform air cooling and dehumidification; when 80%<=W<90%, the fan is controlled to rotate at 3000rpm to perform air cooling and dehumidification; and when W>=90%, the control module (1) cuts off the power supply of the main machine; wherein W is the detected humidity value; The oil fume purification module (7) is started regularly to purify the oil fume on the main machine, so that the performance of the main machine is not affected by too much oil dirt.

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