Integrated device for clean return air filtering and pressure adjusting system

Abstract

The utility model belongs to the technical field of clean type return air filtering and pressure adjusting, and particularly provides an integrated device for a clean type return air filtering and pressure adjusting system, which comprises an electric air volume adjusting valve, a liquid crystal touch display screen, a liquid crystal display screen and a liquid crystal display screen, an experimenter can input proper pressure on the liquid crystal touch display screen according to needs, the controller outputs signals to the electric actuator, and the electric actuator drives the opening degree of the valve to change through an internal mechanism, so that the air flow is changed, and the balance of air supply and air exhaust in a laboratory is ensured; when the electric air volume adjusting valve adjusts the air pressure in the laboratory, a motor of the fan in the air return chamber starts to operate, fan blades of the fan are driven to rotate, the fan blades generate negative pressure, air outside the laboratory is sucked into the high-efficiency filter through a pipeline above the device, and after the fan blades suck the outdoor air into the high-efficiency filter, an air flow is generated; air in the laboratory flows, and indoor air circulation is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of winding equipment for galvanized steel wire processing, in particular to an integrated device for a clean return air filtering and pressure regulating system. Background Art

[0002] The return air system filter can effectively filter out harmful substances such as dust, particulate matter, bacteria and viruses in the air, thereby purifying the indoor air and reducing harm to health. By filtering out pollutants in the air, the return air filtration system can improve the indoor air quality and make breathing healthier. The filter can prevent the air conditioning system from inhaling a large amount of dust and bacteria, thereby protecting the air conditioning unit from damage and extending its service life.

[0003] The comparative document (Announcement No.: CN117404750A) discloses that the present invention relates to the field of purification equipment technology, and more specifically, to an industrial air purifier with adaptive pressure regulation and its regulation method, including a return air box and a transformer filter box installed inside the return air box, a return air zone is formed between the transformer filter box and the return air box, and the return air zone is connected to the indoor air intake port and the outdoor fresh air intake port on the return air box; the transformer filter box is installed with a purifier body, and a transformer fan is installed at the air inlet of the transformer filter box to suck the gas in the return air zone into the transformer filter box for purification through the purifier body. The present invention is internally installed with an air quality detector, and the indoor air quality can be detected by the air quality detector, and whether to turn on the industrial air purifier of the present invention for purification and filtering can be selected according to the real-time detected air quality status, and when the indoor air quality is poor, the transformer fan power can be increased to improve the air intake and ventilation speed.

[0004] The comparative document (Announcement No.: CN213942668U) discloses that the utility model relates to the technical field of medical equipment, and particularly to an exhaust gas filtering device, including a suction fan, a first filtering device is arranged on the right side of the suction fan, and an exhaust gas heating device is arranged on the right side of the first filtering device, a reaction device is arranged on the right side of the exhaust gas heating device, and a second filtering device is arranged on the right side of the reaction device, a detection device is arranged on the right side of the second filtering device, and an induced draft fan is arranged on the right side of the detection device, a constant pressure device is arranged on the right side of the induced draft fan, and a third filtering device is arranged on the right side of the constant pressure device, the suction fan, the first filtering device, the exhaust gas heating device, the reaction device, the second filtering device, the detection device, the induced draft fan, the constant pressure device and the third filtering device are all connected in sequence through a ventilation duct, and a return air device is also arranged in parallel on the ventilation duct. The utility model has a novel design, a reasonable structure, and adopts multi-stage filtration, so the filtering effect is better.

[0005] In the process of implementing this solution, the utility model inventor found that the following problems existed in the prior art and were not well solved:

[0006] Nowadays, laboratory experimenters have higher and higher requirements for laboratory air, but the current air filtration devices cannot meet the experimenters' requirements for air. Utility Model Content

[0007] The purpose of the utility model is to provide an integrated device for a clean return air filtration and pressure regulation system to solve the problem raised in the above background technology that the requirements of laboratory personnel for laboratory air are getting higher and higher, while the current air filtration devices cannot meet the requirements of laboratory personnel for air.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an integrated device for a clean return air filtration and pressure regulation system, comprising:

[0009] Pipeline, electric air volume regulating valve, high efficiency filter, LCD touch screen, return air vent, optocoupler isolation relay, fan, fan control circuit;

[0010] The electric air volume regulating valve comprises a valve, an electric actuator and a controller;

[0011] The pipeline is located above the box of the device, the valve is located in the pipeline above the box of the device, and the high-efficiency filter is located in the middle of the box of the device; the LCD touch screen is located in the middle part of the front side of the box of the device; the return air port is located at the front side of the lower side of the box of the device, and the fan is located in the return air room; the LCD touch screen is connected to the optical coupling isolation relay; the optical coupling isolation relay is connected to the fan control circuit and the controller; the controller is connected to the electric actuator; the electric actuator is connected to the valve;

[0012] The electric air volume regulating valve can measure the pressure of the laboratory and display it on the LCD touch screen. The experimenter can input the appropriate pressure on the LCD touch screen as needed. The controller outputs a signal to the electric actuator, and the electric actuator drives the change of the valve opening through the internal mechanism, thereby changing the air flow rate to ensure the balance of supply and exhaust air volume in the laboratory; when the electric air volume regulating valve adjusts the air pressure in the laboratory, the motor of the return air indoor fan starts to run, driving the fan blades to rotate, and the fan blades generate negative pressure, sucking the air outside the laboratory into the high-efficiency filter through the pipe above the device. When the fan blades suck the outdoor air into the high-efficiency filter, an airflow is generated, which makes the laboratory The air in the laboratory flows and maintains indoor air circulation, so that the gas in the laboratory enters the high-efficiency filter from the return air port. The high-efficiency filter adsorbs the dust in the gas, inactivates the microorganisms in it, catalyzes the decomposition of chemical gases, and fills the treated gas into the laboratory; after a period of circulation, the quality of the air in the high-efficiency filter will decrease and there will be pollutants. The experimenter can adjust the direction of the fan to discharge the polluted air in the high-efficiency filter and inhale fresh air into the high-efficiency filter again; in this process, harmful substances in the air are filtered, the indoor air is purified, the experimenter breathes healthier, and the impact of harmful substances in the air on the experiment is reduced.

[0013] Preferably, the electric actuator, the input terminal NET1 is connected to one end of a resistor R1 with a resistance of 10K;

[0014] The other end of the resistor R1 is connected to the cathode of the diode D1 and the pin 1 of the U1 PCB17C;

[0015] The positive electrode of the diode D1 is connected to the output end and the negative electrode of the diode D2;

[0016] The anode of the diode D2 is connected to pin 2 of U1 PCB17C;

[0017] Pin 3 of the U1 PCB17C is connected to the emitter of transistor Q1 and the lower terminal of Q2 BTA41-600BRG;

[0018] Pin 4 of the U1 PCB17C is connected to one end of a resistor R2 having a resistance of 10K;

[0019] The other end of the resistor R2 is connected to the base of the transistor Q1 and one end of a resistor R3 having a resistance of 10K;

[0020] The other end of the resistor R3 is connected to the resistor R4 with a resistance of 10K, the upper terminal of Q2 BTA41-600BRG, the cathode of the diode D3 and the cathode of the diode D4;

[0021] The other end of the resistor R4 is connected to the collector of transistor Q1 and the trigger electrode of Q2 BTA41-600BRG;

[0022] The positive electrode of the diode D3 is connected to the negative electrode of the diode D5, one end of the resistor R6 with a resistance of 10K, and the trigger electrode of Q3BTA41;

[0023] The positive electrode of the diode D4 is connected to one end of a resistor R5 having a resistance of 10K and the negative electrode of the diode D6;

[0024] The positive electrode of the diode D5 and the positive electrode of the diode D6;

[0025] The other end of the resistor R6 is connected to the lower terminal of Q3 BTA41, one end of the resistor R7 with a resistance of 10K, the lower terminal of Q4RU207C and the output terminal NET4;

[0026] The other end of the resistor R5 is connected to the upper terminal of Q3 BTA41 and one end of the capacitor C1 with a capacitance of 100nK and the upper terminal of Q4 RU207C and the input terminal NET2;

[0027] The other end of the capacitor C1 is connected to the other end of the resistor R7.

[0028] Preferably, the controller, the input end is connected to one end of a resistor R3 with a resistance of 10K;

[0029] The other end of the resistor R3 is connected to the base of the transistor Q2;

[0030] The collector of the transistor Q2 is connected to one end of a resistor R2 having a resistance of 10K;

[0031] The emitter of the transistor Q2 is connected to one end of a resistor R8 having a resistance of 10K and the base of the transistor Q3;

[0032] The other end of the resistor R2 is connected to the base of the transistor Q4 and one end of the resistor R4 with a resistance of 10K;

[0033] The other end of the resistor R8 is connected to the emitter of the transistor Q3, the collector of the transistor Q6 and one end of the resistor R7 with a resistance of 10K;

[0034] The collector of the transistor Q3 is connected to the emitter of the transistor Q1, the positive electrode of the diode D1, one end of the capacitor C1 with a capacitance of 100nK, the positive electrode of the MOT1 LCM1027A2445F, and the positive electrode of the diode D3;

[0035] The cathode of the diode D3 is connected to the cathode of the diode D3;

[0036] The positive electrode of the diode D4 is connected to the negative electrode of the MOT1 LCM1027A2445F and the other end of the capacitor C1 and the positive electrode of the diode D2 and the collector of the transistor Q4 and the emitter of the transistor Q6;

[0037] The other end of the resistor R7 is connected to the base of the transistor Q6 and the collector of the transistor Q5;

[0038] The base of the transistor Q5 is connected to one end of a resistor R6 having a resistance of 10K;

[0039] The other end of the resistor R6 is connected to the output end;

[0040] The emitter of the transistor Q5 is connected to one end of a resistor R5 having a resistance of 10K;

[0041] The other end of the resistor R5 is connected to one end of the resistor R1 with a resistance of 10K and the base of the transistor Q1;

[0042] The other end of the resistor R1 is connected to the power supply VCC, the collector of the transistor Q1, the cathode of the diode D1, one end of the resistor R4 with a resistance of 10K, the emitter of the transistor Q4, and the cathode of the diode D2;

[0043] The other end of the resistor R4 is connected to the base of the transistor Q4 and the other end of the resistor R2.

[0044] Preferably, the optical coupler isolation relay, the power supply VCC is connected to one end of the resistor R1 with a resistance of 10K;

[0045] The other end of the resistor R1 is connected to pin 1 of U1 EL817S(C)(TU)-F;

[0046] Pin 3 of the U1 EL817S(C)(TU)-F is connected to one end of a resistor R2 having a resistance of 10K and a resistor R3 having a resistance of 10K;

[0047] Pin 4 of the U1 EL817S(C)(TU)-F is connected to the collector of transistor Q1 and the power supply VCC;

[0048] The other end of the resistor R2 is grounded;

[0049] The other end of the resistor R3 is connected to the base of the transistor Q1;

[0050] The emitter of the transistor Q1 is connected to the 1 pin of RELAY1 G5PZ-1A DC12 BY OMZ / C and the cathode of LED1NCD0805R1;

[0051] The positive electrode of LED1 NCD0805R1 is grounded;

[0052] The 4-pin of the RELAY1 G5PZ-1A DC12 BY OMZ / C is grounded.

[0053] Preferably, in the fan control circuit, the switch K1 connects the switch K2 and one end of the fuse F2;

[0054] The other end of the switch K2 is connected to one end of the fuse isolator RT1;

[0055] The other end of the fuse isolator RT1 is connected to the motor M1;

[0056] The other end of the fuse F2 is connected to one end of the switch Q1, the switch Q2 and the switch Q3;

[0057] The other end of the switch Q1 is connected to one end of the normally closed button S1;

[0058] The other end of the normally closed button S1 is connected to the normally open button S2 and one end of the switch K3;

[0059] The other end of the normally open button S2 is connected to the other end of the switch K3 and one end of the normally closed button S3 and one end of the switch K4;

[0060] The other end of the switch K4 is connected to the other end of the switch Q2;

[0061] The other end of the normally closed pull button S3 is connected to one end of the resistor R1;

[0062] The other end of the resistor R1 is connected to one end of the resistor R2 and one end of the indicator S1;

[0063] The other end of the switch Q3 is connected to the resistor R2 and the other end of the indicator S1 .

[0064] Compared with the prior art, the beneficial effects of the utility model are:

[0065] The return air filtration system is used to effectively filter out bacteria and viruses in the air to meet the requirements of experimenters for laboratory air. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is one of the schematic diagrams of the structure of an integrated device for a clean return air filtration and pressure regulation system of the utility model;

[0067] Figure 2 This is one of the schematic diagrams of the structure of an integrated device for a clean return air filtration and pressure regulation system of the utility model;

[0068] Figure 3 This is one of the schematic diagrams of the structure of an integrated device for a clean return air filtration and pressure regulation system of the utility model;

[0069] Figure 4 This is one of the schematic diagrams of the structure of an integrated device for a clean return air filtration and pressure regulation system of the utility model;

[0070] Figure 5 This is one of the schematic diagrams of the structure of an integrated device for a clean return air filtration and pressure regulation system of the utility model;

[0071] Figure 6 This is one of the schematic diagrams of the structure of an integrated device for a clean return air filtration and pressure regulation system of the utility model.

[0072] In the figure: 1. Pipeline; 2. Valve; 3. Electric actuator; 4. Controller; 5. High-efficiency filter; 6. Optocoupler isolation relay; 7. Fan; 8. Fan control circuit; 9. LCD touch screen; 10. Return air outlet.

[0073] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0075] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0076] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0077] See also Figure 1-6 The utility model provides a technical solution: an integrated device for a clean return air filtration and pressure regulation system, comprising a pipeline 1, an electric air volume regulating valve, a high-efficiency filter 5, a liquid crystal touch display screen 9, a return air port 10, an optical coupling isolation relay 6, a fan 7, and a fan control circuit 8; the electric air volume regulating valve comprises a valve 2, an electric actuator 3, and a controller 4;

[0078] The pipe 1 is located above the box of the device, the valve 2 is located in the pipe 1 above the box of the device, and the high-efficiency filter 5 is located in the middle of the box of the device; the liquid crystal touch screen 9 is located in the middle part of the front side of the box of the device; the return air port 10 is located at the front side of the lower side of the box of the device, and the fan 7 is located in the return air room; the liquid crystal touch screen 9 is connected to the optical coupling isolation relay 6; the optical coupling isolation relay 6 is connected to the fan control circuit 8 and the controller 4; the controller 4 is connected to the electric actuator 3; the electric actuator 3 is connected to the valve 2;

[0079] Electric actuator 3, input terminal NET1 is connected to one end of resistor R1 with a resistance of 10K;

[0080] The other end of resistor R1 is connected to the cathode of diode D1 and pin 1 of U1 PCB17C;

[0081] The positive electrode of the diode D1 is connected to the output terminal and the negative electrode of the diode D2;

[0082] The anode of diode D2 is connected to pin 2 of U1 PCB17C;

[0083] Pin 3 of U1 PCB17C is connected to the emitter of transistor Q1 and the lower terminal of Q2 BTA41-600BRG;

[0084] Pin 4 of U1 PCB17C is connected to one end of the 10K resistor R2;

[0085] The other end of the resistor R2 is connected to the base of the transistor Q1 and one end of the resistor R3 with a resistance of 10K;

[0086] The other end of the resistor R3 is connected to the resistor R4 with a resistance of 10K and the upper terminal of Q2 BTA41-600BRG and the cathode of the diode D3 and the cathode of the diode D4;

[0087] The other end of resistor R4 is connected to the collector of transistor Q1 and the trigger electrode of Q2 BTA41-600BRG;

[0088] The positive electrode of diode D3 is connected to the negative electrode of diode D5 and one end of resistor R6 with a resistance of 10K and the trigger electrode of Q3 BTA41;

[0089] The positive electrode of the diode D4 is connected to one end of the resistor R5 having a resistance of 10K and the negative electrode of the diode D6;

[0090] The positive electrode of the diode D5 and the positive electrode of the diode D6;

[0091] The other end of the resistor R6 is connected to the lower terminal of Q3 BTA41, one end of the resistor R7 with a resistance of 10K, the lower terminal of Q4RU207C and the output terminal NET4;

[0092] The other end of the resistor R5 is connected to the upper terminal of Q3 BTA41, one end of the capacitor C1 with a capacitance of 100nK, the upper terminal of Q4RU207C and the input terminal NET2;

[0093] The other end of the capacitor C1 is connected to the other end of the resistor R7;

[0094] The controller 4, the input end is connected to one end of the resistor R3 with a resistance of 10K;

[0095] The other end of the resistor R3 is connected to the base of the transistor Q2;

[0096] The collector of transistor Q2 is connected to one end of resistor R2 with a resistance of 10K;

[0097] The emitter of transistor Q2 is connected to one end of resistor R8 with a resistance of 10K and the base of transistor Q3;

[0098] The other end of the resistor R2 is connected to the base of the transistor Q4 and one end of the resistor R4 with a resistance of 10K;

[0099] The other end of the resistor R8 is connected to the emitter of the transistor Q3, the collector of the transistor Q6 and one end of the resistor R7 with a resistance of 10K;

[0100] The collector of transistor Q3 is connected to the emitter of transistor Q1, the positive electrode of diode D1, one end of capacitor C1 with a capacitance of 100nK, the positive electrode of MOT1 LCM1027A2445F and the positive electrode of diode D3;

[0101] The cathode of the diode D3 is connected to the cathode of the diode D3;

[0102] The positive electrode of diode D4 is connected to the negative electrode of MOT1 LCM1027A2445F and the other end of capacitor C1 and the positive electrode of diode D2 and the collector of transistor Q4 and the emitter of transistor Q6;

[0103] The other end of the resistor R7 is connected to the base of the transistor Q6 and the collector of the transistor Q5;

[0104] The base of transistor Q5 is connected to one end of resistor R6 having a resistance of 10K;

[0105] The other end of the resistor R6 is connected to the output end;

[0106] The emitter of transistor Q5 is connected to one end of resistor R5 having a resistance of 10K;

[0107] The other end of the resistor R5 is connected to one end of the resistor R1 with a resistance of 10K and the base of the transistor Q1;

[0108] The other end of the resistor R1 is connected to the power supply VCC, the collector of the transistor Q1, the cathode of the diode D1, one end of the resistor R4 with a resistance of 10K, the emitter of the transistor Q4, and the cathode of the diode D2;

[0109] The other end of the resistor R4 is connected to the base of the transistor Q4 and the other end of the resistor R2;

[0110] Optocoupler isolation relay 6, power supply VCC is connected to one end of resistor R1 with a resistance of 10K;

[0111] The other end of resistor R1 is connected to pin 1 of U1 EL817SCTU-F;

[0112] Pin 3 of U1 EL817SCTU-F is connected to one end of resistor R2 with a resistance of 10K and resistor R3 with a resistance of 10K;

[0113] Pin 4 of U1 EL817SCTU-F is connected to the collector of transistor Q1 and power supply VCC;

[0114] The other end of the resistor R2 is grounded;

[0115] The other end of the resistor R3 is connected to the base of the transistor Q1;

[0116] Connect the emitter of transistor Q1 to pin 1 of RELAY1 G5PZ-1A DC12 BY OMZ / C and the cathode of LED1NCD0805R1;

[0117] The positive terminal of LED1 NCD0805R1 is grounded;

[0118] RELAY1 G5PZ-1A DC12 BY OMZ / C 4-pin ground;

[0119] In the fan control circuit 8, the switch K1 is connected to the switch K2 and one end of the fuse F2;

[0120] The other end of the switch K2 is connected to one end of the fuse isolator RT1;

[0121] The other end of the disconnector RT1 is connected to the motor M1;

[0122] The other end of the fuse F2 is connected to one end of the switch Q1, the switch Q2 and the switch Q3;

[0123] The other end of the switch Q1 is connected to one end of the normally closed button S1;

[0124] The other end of the normally closed button S1 is connected to the normally open button S2 and one end of the switch K3;

[0125] The other end of the normally open button S2 is connected to the other end of the switch K3 and one end of the normally closed pull button S3 and one end of the switch K4;

[0126] The other end of the switch K4 is connected to the other end of the switch Q2;

[0127] The other end of the normally closed push button S3 is connected to one end of the resistor R1;

[0128] The other end of the resistor R1 is connected to one end of the resistor R2 and one end of the indicator S1;

[0129] The other end of the switch Q3 is connected to the resistor R2 and the other end of the indicator S1.

[0130] Working principle: The electric air volume regulating valve can measure the pressure in the laboratory and display it on the LCD touch screen 9. The experimenter can input the appropriate pressure on the LCD touch screen 9 as needed. The controller 4 outputs a signal to the electric actuator 3. The electric actuator 3 drives the change of the opening of the valve 2 through the internal mechanism, thereby changing the air flow rate to ensure the balance of supply and exhaust air volume in the laboratory. When the electric air volume regulating valve adjusts the air pressure in the laboratory, the motor of the return air indoor fan 7 starts to run, driving the fan blades to rotate. The fan blades generate negative pressure, and the air outside the laboratory is sucked into the high-efficiency filter 5 through the pipe 1 above the device. When the fan blades suck the outdoor air into the high-efficiency filter 5, an airflow is generated. The air in the laboratory flows and keeps the indoor air circulating, so that the gas in the laboratory enters the high-efficiency filter 5 from the return air port. The high-efficiency filter 5 adsorbs the dust in the gas, inactivates the microorganisms therein, catalytically decomposes the chemical gas, and fills the treated gas into the laboratory; after a period of circulation, the quality of the air in the high-efficiency filter 5 will decrease, and there will be pollutants. The experimenter can adjust the rotation direction of the fan 7 to discharge the polluted air in the high-efficiency filter 5 and inhale fresh air into the high-efficiency filter 5 again; in this process, harmful substances in the air are filtered, the indoor air is purified, the experimenter breathes healthier, and the influence of harmful substances in the air on the experiment is reduced;

[0131] The return air filtration system is used to continuously filter and sterilize the indoor air through a high-efficiency filter before being charged back into the room to improve the indoor air cleanliness and stabilize the indoor air pressure.

[0132] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated device for a clean return air filtration and pressure regulation system, specifically comprising: a pipeline (1), an electric air volume regulating valve, a high efficiency filter (5), a liquid crystal touch screen (9), a return air port (10), an optical coupling isolation relay (6), a fan (7), and a fan control circuit (8); the electric air volume regulating valve comprises a valve (2), an electric actuator (3), and a controller (4); characterized in that: The pipe (1) is located above the housing of the device, the valve (2) is located in the pipe (1) above the housing of the device, and the high-efficiency filter (5) is located in the middle of the housing of the device; the liquid crystal touch screen (9) is located in the middle of the front side of the housing of the device; the return air port (10) is located at the front side of the lower side of the housing of the device, and the fan (7) is located in the return air chamber; the liquid crystal touch screen (9) is connected to an optical coupling isolation relay (6); the optical coupling isolation relay (6) is connected to a fan control circuit (8) and a controller (4); the controller (4) is connected to an electric actuator (3); and the electric actuator (3) is connected to the valve (2).

2. An integrated device for a clean return air filtration and pressure regulation system according to claim 1, characterized in that: The electric actuator (3), the input terminal NET1 is connected to one end of a resistor R1 with a resistance of 10K; The other end of the resistor R1 is connected to the cathode of the diode D1 and the pin 1 of the U1 PCB17C; The positive electrode of the diode D1 is connected to the output end and the negative electrode of the diode D2; The anode of the diode D2 is connected to pin 2 of U1 PCB17C; Pin 3 of the U1 PCB17C is connected to the emitter of transistor Q1 and the lower terminal of Q2 BTA41-600BRG; Pin 4 of the U1 PCB17C is connected to one end of a resistor R2 having a resistance of 10K; The other end of the resistor R2 is connected to the base of the transistor Q1 and one end of a resistor R3 having a resistance of 10K; The other end of the resistor R3 is connected to the resistor R4 with a resistance of 10K, the upper terminal of Q2 BTA41-600BRG, the cathode of the diode D3 and the cathode of the diode D4; The other end of the resistor R4 is connected to the collector of transistor Q1 and the trigger electrode of Q2 BTA41-600BRG; The positive electrode of the diode D3 is connected to the negative electrode of the diode D5, one end of the resistor R6 with a resistance of 10K, and the trigger electrode of Q3 BTA41; The positive electrode of the diode D4 is connected to one end of a resistor R5 having a resistance of 10K and the negative electrode of the diode D6; The positive electrode of the diode D5 and the positive electrode of the diode D6; The other end of the resistor R6 is connected to the lower terminal of Q3 BTA41, one end of the resistor R7 with a resistance of 10K, the lower terminal of Q4RU207C and the output terminal NET4; The other end of the resistor R5 is connected to the upper terminal of Q3 BTA41, one end of the capacitor C1 with a capacitance of 100nK, the upper terminal of Q4RU207C and the input terminal NET2; The other end of the capacitor C1 is connected to the other end of the resistor R7.

3. The integrated device for clean return air filtration and pressure regulation system according to claim 1, characterized in that: The controller (4) has an input end connected to one end of a resistor R3 having a resistance of 10K; The other end of the resistor R3 is connected to the base of the transistor Q2; The collector of the transistor Q2 is connected to one end of a resistor R2 having a resistance of 10K; The emitter of the transistor Q2 is connected to one end of a resistor R8 having a resistance of 10K and the base of the transistor Q3; The other end of the resistor R2 is connected to the base of the transistor Q4 and one end of the resistor R4 with a resistance of 10K; The other end of the resistor R8 is connected to the emitter of the transistor Q3, the collector of the transistor Q6 and one end of the resistor R7 with a resistance of 10K; The collector of the transistor Q3 is connected to the emitter of the transistor Q1, the positive electrode of the diode D1, one end of the capacitor C1 with a capacitance of 100nK, the positive electrode of the MOT1 LCM1027A2445F, and the positive electrode of the diode D3; The cathode of the diode D3 is connected to the cathode of the diode D3; The positive electrode of the diode D4 is connected to the negative electrode of the MOT1 LCM1027A2445F and the other end of the capacitor C1 and the positive electrode of the diode D2 and the collector of the transistor Q4 and the emitter of the transistor Q6; The other end of the resistor R7 is connected to the base of the transistor Q6 and the collector of the transistor Q5; The base of the transistor Q5 is connected to one end of a resistor R6 having a resistance of 10K; The other end of the resistor R6 is connected to the output end; The emitter of the transistor Q5 is connected to one end of a resistor R5 having a resistance of 10K; The other end of the resistor R5 is connected to one end of the resistor R1 with a resistance of 10K and the base of the transistor Q1; The other end of the resistor R1 is connected to the power supply VCC, the collector of the transistor Q1, the cathode of the diode D1, one end of the resistor R4 with a resistance of 10K, the emitter of the transistor Q4, and the cathode of the diode D2; The other end of the resistor R4 is connected to the base of the transistor Q4 and the other end of the resistor R2.

4. The integrated device for clean return air filtration and pressure regulation system according to claim 1, characterized in that: The optical coupler isolation relay (6), the power supply VCC is connected to one end of the resistor R1 with a resistance of 10K; The other end of the resistor R1 is connected to pin 1 of U1 EL817S(C)(TU)-F; Pin 3 of the U1 EL817S(C)(TU)-F is connected to one end of a resistor R2 having a resistance of 10K and a resistor R3 having a resistance of 10K; Pin 4 of the U1 EL817S(C)(TU)-F is connected to the collector of transistor Q1 and the power supply VCC; The other end of the resistor R2 is grounded; The other end of the resistor R3 is connected to the base of the transistor Q1; The emitter of the transistor Q1 is connected to the 1 pin of RELAY1 G5PZ-1A DC12 BY OMZ / C and the cathode of LED1NCD0805R1; The positive electrode of LED1 NCD0805R1 is grounded; The 4-pin of the RELAY1 G5PZ-1A DC12 BY OMZ / C is grounded.

5. The integrated device for clean return air filtration and pressure regulation system according to claim 1, characterized in that: The fan control circuit (8), the switch K1 connects the switch K2 and one end of the fuse F2; The other end of the switch K2 is connected to one end of the fuse isolator RT1; The other end of the fuse isolator RT1 is connected to the motor M1; The other end of the fuse F2 is connected to one end of the switch Q1, the switch Q2 and the switch Q3; The other end of the switch Q1 is connected to one end of the normally closed button S1; The other end of the normally closed button S1 is connected to the normally open button S2 and one end of the switch K3; The other end of the normally open button S2 is connected to the other end of the switch K3 and one end of the normally closed button S3 and one end of the switch K4; The other end of the switch K4 is connected to the other end of the switch Q2; The other end of the normally closed pull button S3 is connected to one end of the resistor R1; The other end of the resistor R1 is connected to one end of the resistor R2 and one end of the indicator S1; The other end of the switch Q3 is connected to the resistor R2 and the other end of the indicator S1 .

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