Ventilation device for building automatic control

Abstract

The utility model relates to the technical field of building ventilation, and particularly discloses a building self-control ventilation device which comprises a building ventilation main pipeline and a branch ventilation pipeline, the branch ventilation pipeline is communicated with the building ventilation main pipeline, an air supply unit is arranged at the bottom of an air inlet channel B, and an air suction column casing is arranged at the bottom of an air suction channel B in a communicated mode. An air suction unit is arranged on one side of the bottom of the air suction column casing. According to the building ventilation main pipeline, the air supply pipeline and the air suction pipeline are integrated on one pipeline, the cost is reduced, fresh air of the building ventilation main pipeline is fed into a room through the branch ventilation pipeline, air in the room is discharged from the air suction pipeline, airflow circulation is formed, and therefore the air quality of an airflow-impassable area of a building is improved, and the ventilation effect of the building is improved. When the oxygen concentration is lower than a set value or smoke is detected, the PLC controls and controls the axial flow air feeder and the axial flow suction fan to increase the rotating speed, so that airflow circulation is accelerated, oxygen in an area is rapidly increased or smoke is rapidly sucked away, and the self-control ventilation effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of building ventilation technology, and more specifically, to a building automation ventilation device. Background Technology

[0002] Ventilation systems are an indispensable infrastructure for buildings. Their core value lies in balancing indoor and outdoor air environments and ensuring health and safety. With the increasing complexity of building functions (such as high-rise buildings and underground spaces) and the growing awareness of health, the technical standards and application scenarios of ventilation systems will continue to expand. Current ventilation systems continuously deliver fresh air from the outside into the area below the fan through ducts. Although this can replenish the oxygen needed in the space, it is difficult to remove harmful gases inside, and there are still many health and safety hazards. If additional air intake ducts are added to create air circulation, the problem of the difficulty in removing harmful gases can be solved. However, the addition of air intake ducts will greatly increase the cost. Therefore, we propose a ventilation system for building automation. Utility Model Content

[0003] In view of the above-mentioned technical problems in related technologies, this utility model provides a ventilation device for building automation, which can solve the above problems.

[0004] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0005] A building automation ventilation device includes a main building ventilation duct and branch ventilation ducts. The branch ventilation ducts are connected to the main building ventilation duct. The main building ventilation duct includes an air inlet channel A and an air intake channel A that are not interconnected. The branch ventilation ducts include an air inlet channel B and an air intake channel B that are not interconnected. An air supply unit is installed at the bottom of the air inlet channel B. An air intake column is connected to the bottom of the air intake channel B. An air intake unit is installed on one side of the bottom of the air intake column. An oxygen concentration sensor and a smoke sensor are fixedly installed on the outer surface of the air intake column. The oxygen concentration sensor and the smoke sensor are electrically connected to a PLC controller. The PLC controller is electrically connected to the air supply unit and the air intake unit through wires.

[0006] Furthermore, the air supply unit includes a fan frame connected to the air inlet channel B, an axial flow fan is fixedly installed inside the fan frame, and the axial flow fan is electrically connected to a frequency converter A.

[0007] Furthermore, the suction unit includes a filter screen and an axial flow suction fan fixed inside the filter screen. The axial flow suction fan is electrically connected to a frequency converter B. Both frequency converter A and frequency converter B are electrically connected to a PLC controller.

[0008] Furthermore, the end of the branch ventilation duct is fixed with a cover by bolts, and the inner wall of the cover is fixed with a boss that fits into the air intake channel B.

[0009] Furthermore, air inlet channel A is connected to air inlet channel B, and air suction channel A is connected to air suction channel B. Air guide strips are fixedly installed on the inner walls of air inlet channel A and air inlet channel B, and the inner walls of air suction channel A and air suction channel B are smooth surfaces.

[0010] Furthermore, the side of the building ventilation main duct is fixedly equipped with a frame A that is connected to the air intake channel A and a frame B that is connected to the air intake channel A. A guide strip is fixedly installed on the inner wall of the frame A. The frame A is fitted and fixed inside the air intake channel B, and the frame B is fitted and fixed inside the air intake channel B.

[0011] The beneficial effects of this utility model are as follows: The building ventilation main duct of this application integrates the air supply and air intake ducts into one duct, which reduces costs through integration. The fresh air from the building ventilation main duct is delivered into the room through the branch ventilation ducts, and the air in the room is exhausted from the air intake duct, forming airflow circulation, thereby improving the air quality in areas of the building where the airflow is not good.

[0012] The oxygen concentration and smoke conditions in the area are monitored by oxygen concentration sensors and smoke sensors. When the oxygen concentration is lower than the set value or smoke is detected, the PLC controls the axial flow fan and axial flow suction fan to increase their speed, thereby accelerating airflow, quickly increasing the oxygen in the area or removing the smoke, and achieving the effect of automatic ventilation.

[0013] Air guide strips are installed in air inlet channels A and B, and marking guide strips are installed on the frame A1 to guide airflow, reduce the vibration of the pipes caused by airflow cross-flow, and mark the matching of air inlet channels to avoid mixing of air intake and exhaust pipes. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Figure 1 This is a structural diagram of a ventilation system for building automation.

[0017] Figure 2 This is a structural diagram of the building's main ventilation duct;

[0018] Figure 3 This is an exploded view of the air supply unit and the air intake unit.

[0019] In the picture:

[0020] 1. Main ventilation duct of the building; 101. Air inlet channel A; 102. Air intake channel A; 2. Air guide strip; 3. Branch ventilation duct; 301. Air inlet channel B; 302. Air intake channel B; 4. Cover; 401. Boss; 5. Air intake column; 6. Oxygen concentration sensor; 7. Smoke sensor; 8. Air supply unit; 801. Fan frame; 802. Axial flow fan; 9. Air intake unit; 901. Axial flow fan; 902. Filter cover; 10. Frame A; 11. Frame B; 12. Identification guide strip. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0022] like Figure 1-3 As shown, this utility model discloses a building automation ventilation device, including a main building ventilation duct 1 and branch ventilation ducts 3. The branch ventilation ducts 3 are connected to the main building ventilation duct 1. The main building ventilation duct 1 includes an air inlet channel A101 and an air intake channel A102 that are not interconnected. The branch ventilation ducts 3 include an air inlet channel B301 and an air intake channel B302 that are not interconnected. An air supply unit 8 is provided at the bottom of the air inlet channel B301. An air intake column 5 is connected to the bottom of the air intake channel B302. An air intake unit 9 is provided on one side of the bottom of the air intake column 5. An oxygen concentration sensor 6 and a smoke detector are fixedly installed on the outer surface of the air intake column 5. Sensor 7, oxygen concentration sensor 6, and smoke sensor 7 are all electrically connected to the PLC controller. The PLC controller is electrically connected to the air supply unit 8 and the air intake unit 9 via wires. The air supply unit 8 includes a fan frame 801 that communicates with the air inlet channel B301. An axial flow fan 802 is fixedly installed inside the fan frame 801. The axial flow fan 802 is electrically connected to a frequency converter A. The air intake unit 9 includes a filter screen 902 and an axial flow fan 901 fixed inside the filter screen 902. The axial flow fan 901 is electrically connected to a frequency converter B. Both the frequency converter A and the frequency converter B are electrically connected to the PLC controller.

[0023] Example 1: The main building ventilation duct 1 is integrally molded with a partition in the middle, dividing it into two distinct channels: an air inlet channel A101 and an air intake channel A102. The inlet end of the main building ventilation duct 1 is connected to a high-power supply fan and a negative pressure suction fan. The supply fan delivers fresh air into the air inlet channel A101, while the negative pressure suction fan generates negative pressure in the air intake channel A102 to absorb air from the room area. One end of the branch ventilation duct 3 is simultaneously fitted with frame A10 and frame B11. Frame A10 is fitted and fixed inside the air inlet channel B101, and frame B11 is fitted with... The branch ventilation duct 3 is fixed inside the suction channel B302 and bolted to the frame A10 and frame B11. The cover 4 seals the other end of the branch ventilation duct 3. The axial flow fan 802 is fixed inside the fan frame 801. The axial flow suction fan 901 is fixed to the back of the filter screen 902. The filter screen 902 is fixed to the suction port on one side of the bottom of the suction column 5 by bolts. The suction port on one side of the bottom of the suction column 5 is offset from the air supply unit 8. The speed of the axial flow fan 802 and the axial flow suction fan 901 can be controlled by the frequency converter.

[0024] Connect the signal output terminal of oxygen concentration sensor 6 to the analog input module of the PLC controller. The oxygen concentration sensor monitors the oxygen concentration in real time and converts the concentration value into an analog signal (such as 4-20mA or 0-10V) and transmits it to the PLC. Similarly, connect the signal output terminal of smoke sensor 7 to the analog input module of the PLC. The smoke sensor detects the smoke concentration and transmits the concentration information to the PLC in the form of an analog signal. The digital output module of the PLC is connected to the control input terminal of the frequency converter. After processing the signal fed back by the sensor, the PLC sends control commands, such as acceleration and deceleration signals, to the frequency converter through the digital output module. The output terminal of the frequency converter is connected to the motors of axial flow blower 802 and axial flow suction fan 901. After receiving the command from the PLC, the frequency converter adjusts the output frequency, thereby changing the motor speed and realizing the control of the fan speed. Connect the oxygen concentration sensor, smoke concentration sensor, PLC, frequency converter, axial flow blower and axial flow suction fan to a suitable power supply to ensure that the power supply voltage and power of each device meet their working requirements to ensure the normal operation of the equipment.

[0025] In the preferred technical solution, a cover 4 is fixedly installed at the end of the branch ventilation duct 3 by bolts. A boss 401 is fixedly installed on the inner wall of the cover 4 to fit into the air intake channel B302. The boss 401 can fit tightly with the inner wall of the air intake channel B302, which helps to maintain the negative pressure environment of the air intake channel B302.

[0026] In the preferred technical solution, the air inlet channel A101 is connected to the air inlet channel B301, and the air suction channel A102 is connected to the air suction channel B302. The inner walls of the air inlet channel A101 and the air inlet channel B301 are both fixedly provided with air guide strips 2. The air guide strips 2 are used to guide the airflow and reduce the vibration of the pipeline caused by airflow crossflow. The inner walls of the air suction channel A102 and the air suction channel B302 are both smooth surfaces.

[0027] In the preferred technical solution, the side of the building ventilation main duct 1 is fixedly provided with a frame A10 that is connected to the air inlet channel A101 and a frame B11 that is connected to the air suction channel A102. The inner wall of the frame A10 is fixedly provided with an identification guide strip 12, which is also used to mark the matching of the air inlet channel to avoid mixing of the air intake and air suction ducts. The frame A10 is fitted and fixed inside the air inlet channel B301, and the frame B11 is fitted and fixed inside the air suction channel B302.

[0028] In practical use, the inlet end of the main building ventilation duct 1 is connected to a high-power supply fan and a negative pressure suction fan. The supply fan delivers fresh air into the air inlet duct A101, and the negative pressure suction fan generates negative pressure in the air intake duct A102. The supply unit 8 can transport the fresh air in the air inlet duct A101 through the air inlet duct B301 of the branch ventilation duct 3 to the space area below the supply unit 8. The axial flow suction fan 901 starts, which can draw the airflow in the area into the suction column 5 and the suction duct B302, and finally exhaust it from the suction duct A102. This achieves the goal of fresh air entering the space area below the supply unit 8, and the original gas in the space area being exhausted through the suction column 5, the suction duct B302, and the suction duct A102, thus realizing gas circulation and ventilation. When the oxygen concentration sensor 6 detects an oxygen content below 19.5%, the PLC controller uses a frequency converter to increase the speed of the axial flow fan 802 and the axial flow suction fan 901 from the base 1500 rpm to 2000 rpm. When the oxygen concentration sensor 6 detects an oxygen content between 21% and 22%, the PLC controller uses a frequency converter to reduce the speed of the axial flow fan 802 and the axial flow suction fan 901 from 2000 rpm to the base 1500 rpm, thus protecting the motor. Similarly, when the smoke sensor 7 detects smoke, the speed of the axial flow fan 802 and the axial flow suction fan 901 increases, and then decreases to the base 1500 rpm after the smoke signal disappears.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ventilation device for building automation, characterized in that, The system includes a main building ventilation duct (1) and branch ventilation ducts (3). The branch ventilation ducts (3) are connected to the main building ventilation duct (1). The main building ventilation duct (1) includes an air intake channel A (101) and an air intake channel A (102) that are not connected to each other. The branch ventilation ducts (3) include an air intake channel B (301) and an air intake channel B (302) that are not connected to each other. An air supply unit (8) is provided at the bottom of the air intake channel B (301). An air intake column (5) is connected to the bottom of the air intake channel B (302). An air intake unit (9) is provided on one side of the bottom of the air intake column (5). An oxygen concentration sensor (6) and a smoke sensor (7) are fixedly provided on the outer surface of the air intake column (5). The oxygen concentration sensor (6) and the smoke sensor (7) are both electrically connected to a PLC controller. The PLC controller is electrically connected to the air supply unit (8) and the air intake unit (9) through wires.

2. The ventilation device for building automation according to claim 1, characterized in that, The air supply unit (8) includes a fan frame (801) connected to the air inlet channel B (301), and an axial flow fan (802) is fixedly installed inside the fan frame (801). The axial flow fan (802) is electrically connected to a frequency converter A.

3. A building automation ventilation device according to claim 2, characterized in that, The suction unit (9) includes a filter screen (902) and an axial flow suction fan (901) fixed inside the filter screen (902). The axial flow suction fan (901) is electrically connected to a frequency converter B. Both the frequency converter A and the frequency converter B are electrically connected to a PLC controller.

4. A ventilation device for building automation according to claim 1, characterized in that, The end of the branch ventilation duct (3) is fixed with a cover (4) by bolts, and the inner wall of the cover (4) is fixed with a boss (401) that fits into the air intake channel B (302).

5. A building automation ventilation device according to claim 1, characterized in that, The air inlet channel A (101) is connected to the air inlet channel B (301), and the air suction channel A (102) is connected to the air suction channel B (302). The inner walls of the air inlet channel A (101) and the air inlet channel B (301) are both fixedly provided with air guide strips (2), and the inner walls of the air suction channel A (102) and the air suction channel B (302) are both smooth surfaces.

6. A ventilation device for building automation according to claim 1, characterized in that, The building ventilation main duct (1) is fixedly provided with a frame A (10) connected to the air inlet channel A (101) and a frame B (11) connected to the air suction channel A (102). The inner wall of the frame A (10) is fixedly provided with a guide strip (12). The frame A (10) is fitted and fixed inside the air inlet channel B (301), and the frame B (11) is fitted and fixed inside the air suction channel B (302).

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