Air curtain system

Abstract

This utility model belongs to the technical field of air curtain systems, and more particularly to air curtain systems. It includes an air curtain fan, positioned above a passageway opening to generate airflow; an electric door, also positioned at the passageway opening to control its opening and closing; and an interlocking control device electrically connected to the air curtain fan and the electric door. The interlocking control device is configured to start the air curtain fan when an electric door opening signal is detected, and to stop the air curtain fan when an electric door closing signal is detected. The interlocking control device includes a signal detection module for detecting the opening or closing status signal of the electric door. This utility model has a reasonable design and effectively solves the problem of high energy consumption caused by the 24-hour operation of traditional air curtain system fans. It has advantages such as energy saving, extended equipment lifespan, intelligent control, and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of air curtain system technology, and particularly to air curtain systems. Background Technology

[0002] In existing air curtain system applications, fans in many locations often operate continuously for 24 hours. This is especially true in factories and workshops with automated production lines, where the fans run uninterrupted regardless of whether the electric doors are open or closed. While this operation ensures the continuous function of the air curtain to some extent, it leads to extremely high energy consumption. Prolonged fan operation not only increases electricity costs but, in areas with limited power resources, may also result in unnecessary energy waste, contradicting current energy conservation and environmental protection principles. Furthermore, continuous operation for extended periods accelerates wear and tear on fan components, shortens maintenance cycles, increases maintenance costs, and ultimately affects the equipment's lifespan.

[0003] Therefore, it is urgent to improve the existing air curtain system to solve the problems caused by high energy consumption.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings mentioned in the background section by proposing an air curtain system.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an air curtain system, comprising:

[0007] An air curtain fan is installed above the passage opening to generate air curtain airflow;

[0008] An electric gate, which is installed at the entrance of the passageway and is used to control the opening and closing of the passageway;

[0009] An interlocking control device is electrically connected to the air curtain fan and the electric door. The interlocking control device is configured to start the air curtain fan when an electric door opening signal is detected, and to stop the air curtain fan when an electric door closing signal is detected.

[0010] Preferably, the interlocking control device includes a signal detection module, which is used to detect the open or closed status signal of the electric door.

[0011] Preferably, the interlocking control device further includes a control module, which is a programmable logic controller (PLC). The PLC controls the start and stop of the air curtain fan according to the received signals.

[0012] Preferably, the interlocking control device further includes a wind speed adjustment module, which is connected to the air curtain fan and is used to adjust the wind speed of the air curtain fan.

[0013] Preferably, the wind speed adjustment module is a frequency converter, which adjusts the fan speed by changing the power frequency input to the air curtain fan, thereby adjusting the wind speed.

[0014] Preferably, the air curtain fan is a centrifugal fan.

[0015] Preferably, it also includes a temperature sensor, which is located in the space where the air curtain system is located, and the temperature sensor is connected to an interlocking control device.

[0016] Preferably, it also includes a humidity sensor, which is installed in the space where the air curtain system is located, and the humidity sensor is connected to an interlocking control device.

[0017] Preferably, it also includes a backup power supply, which is connected to the air curtain fan and the interlocking control device.

[0018] Preferably, the electric door is one of a roller shutter door, a swing door, or a sliding door.

[0019] The beneficial effects of this utility model are:

[0020] Significant energy-saving effect: Through the interlocking control device, the air curtain fan only operates when the electric door is opened and stops when it is closed, avoiding the large amount of energy consumption caused by the fan running continuously for 24 hours, greatly reducing energy costs and conforming to the development trend of energy conservation and environmental protection.

[0021] Extending equipment lifespan: By eliminating the need for continuous operation of air curtain fans for extended periods, wear and tear on components is reduced, lowering the probability of equipment failure and thus extending the overall lifespan of the equipment. This reduces the frequency of equipment replacement and maintenance, further lowering operating costs.

[0022] Intelligent control: By combining temperature and humidity sensors, the air curtain fan speed can be automatically adjusted according to the temperature and humidity in the space, achieving more intelligent and user-friendly control and improving environmental comfort.

[0023] High reliability: By equipping a backup power supply, the air curtain system can still operate normally for a certain period of time in the event of a main power outage, ensuring that the safety and functionality of the site are not affected and improving the reliability of the entire system. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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.

[0025] Figure 1 This is a three-dimensional structural diagram of the air curtain system proposed in this utility model;

[0026] Figure 2 for Figure 1 A structural diagram from another perspective;

[0027] Figure 3 This is a flowchart of the present invention;

[0028] Figure 4 This is a flowchart of the interlocking control device proposed in this utility model.

[0029] In the diagram: 1. Air curtain fan; 2. Interlocking control device; 21. Signal detection module; 22. Control module; 23. Wind speed adjustment module; 3. Electric door; 4. Backup power supply; 5. Humidity sensor; 6. Temperature sensor. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Reference Figure 1-4 Air curtain system, including:

[0032] Air curtain fan 1 is installed above the passage opening to generate air curtain airflow. Air curtain fan 1 is a centrifugal fan. Centrifugal fans have the characteristics of high air pressure and long range, which can better form an effective air curtain.

[0033] Electric door 3 is installed at the entrance of the passageway and is used to control the opening and closing of the passageway.

[0034] Interlocking control device 2 is electrically connected to air curtain fan 1 and electric door 3. Interlocking control device 2 is configured to start air curtain fan 1 when an opening signal of electric door 3 is detected, and to stop air curtain fan 1 when a closing signal of electric door 3 is detected.

[0035] The interlocking control device 2 includes a signal detection module 21, a control module 22, and a wind speed adjustment module 23. The signal detection module 21 is used to detect the opening or closing status signal of the electric door 3 and transmit the signal to the control module 22. The control module 22 is a programmable logic controller (PLC). The PLC controls the start and stop of the air curtain fan 1 according to the received signal. The wind speed adjustment module 23 is connected to the air curtain fan 1 and is used to adjust the wind speed of the air curtain fan 1. The wind speed adjustment module 23 is a frequency converter. The frequency converter adjusts the fan speed by changing the power frequency input to the air curtain fan 1, thereby adjusting the wind speed.

[0036] Temperature sensor 6 is installed in the space where the air curtain system is located. Temperature sensor 6 is connected to interlock control device 2. When the temperature in the space exceeds the preset range, interlock control device 2 controls the air curtain fan 1 to operate at a specific wind speed.

[0037] Humidity sensor 5 is installed in the space where the air curtain system is located. Humidity sensor 5 is connected to interlock control device 2. When the humidity in the space exceeds the preset range, interlock control device 2 controls the air curtain fan 1 to operate at a specific wind speed.

[0038] Backup power supply 4 is connected to air curtain fan 1 and interlock control device 2, and provides power support to air curtain fan 1 and interlock control device 2 when the main power supply fails.

[0039] In this embodiment, the electric door 3 is one of a roller shutter door, a swing door, or a sliding door.

[0040] The circuits, electronic components, and module mechanisms involved all employ existing technologies, which can be fully implemented by those skilled in the art, and need no further explanation. The content protected by this application does not involve any improvement to the software, circuits, or methods.

[0041] During system installation, the air curtain fan 1 is positioned above the passageway entrance to ensure that the fan outlet effectively covers the entrance, forming a complete and effective air curtain. For example, at a shopping mall entrance, the air curtain fan 1 is installed above the door frame to ensure that the air curtain can block the disorderly exchange of indoor and outdoor air.

[0042] When installing electric door 3, you can choose roller shutter door, swing door or sliding door according to the needs of the place. The installation process must be carried out in strict accordance with the installation specifications of electric door 3 to ensure the normal opening and closing function of the door.

[0043] The interlocking control device 2 is installed on the inner wall of the top of the passage or in another location that is easy to operate and maintain. The interlocking control device 2 is electrically connected to the air curtain fan 1 and the electric door 3 respectively through wires to realize signal transmission and control. The signal detection module 21 can be installed near the control circuit of the electric door 3 in order to accurately detect the opening or closing status signal of the electric door 3.

[0044] In use, when a person or vehicle approaches the electric door 3, an opening signal is triggered (e.g., via an infrared sensor), causing the electric door 3 to open. At the same time, the signal detection module 21 in the interlocking control device 2 detects the opening signal of the electric door 3 and transmits the signal to the control module 22 (e.g., a programmable logic controller PLC). After receiving the signal, the control module 22 issues a start command to control the air curtain fan 1 to start running. The fan generates airflow, forming an air curtain at the passage entrance, which serves to block indoor and outdoor air exchange, prevent dust, and prevent insects.

[0045] When a person or vehicle passes through, the electric door 3 receives a closing signal and begins to close. The signal detection module 21 detects the closing signal of the electric door 3 and transmits it to the control module 22. After receiving the closing signal, the control module 22 issues a stop command to control the air curtain fan 1 to stop operating, thereby realizing the dynamic start and stop of the air curtain system and achieving the purpose of energy saving.

[0046] By adjusting the wind speed of the wind curtain fan 1 using the wind speed adjustment module 23 (such as a frequency converter), the wind speed can be adjusted according to actual needs. For example, when the outdoor wind is strong, the power frequency of the wind curtain fan 1 can be increased by the frequency converter, which will increase the fan speed and wind speed to better block the intrusion of outdoor air; when the flow of people is low and the outdoor environment is relatively stable, the fan speed can be reduced to decrease the wind speed and save energy.

[0047] Temperature sensor 6 and humidity sensor 5 monitor the temperature and humidity in the space in real time. If the temperature or humidity exceeds the preset range, temperature sensor 6 or humidity sensor 5 will transmit the signal to the control module 22 of the interlock control device 2. The control module 22 will control the air curtain fan 1 to operate at a specific wind speed according to the preset program to adjust the temperature and humidity in the space and improve the comfort of the environment.

[0048] When the main power supply is working normally, the backup power supply 4 is in a charging standby state. When the main power supply fails due to a fault or other reasons, the backup power supply 4 automatically switches to provide power support for the air curtain fan 1 and the interlock control device 2, ensuring that the air curtain system can continue to work normally for a certain period of time and ensuring the safety and functionality of the site.

[0049] In a specific embodiment, the signal detection module 21 acquires the status of the electric door 3 in real time through any of the following methods: for monitoring the change of the electric door motor current, the motor current rises to the peak value (typical value 5.8-6.2A) when the door is open, and drops to the standby current (≤0.5A) when the door is closed; for the infrared beam sensor installed on the door frame, the opening signal is triggered when the door displacement exceeds the threshold distance (≥10cm); for the magnetic sensor at the end of the door track, the magnetic induction intensity >50mT when the door is closed is determined to be closed.

[0050] In a specific embodiment, when the temperature and humidity sensor triggers the fan to start (e.g., temperature > 28℃ or humidity < 30%), the control module 22 prioritizes executing the following process: checking the status of the electric door 3; if the door is open, it operates at the preset fan speed; if the door is closed: the fan is started and runs for 3 minutes (configurable range 1-5 minutes) before automatically stopping; if an opening signal is detected during this period, the timer is reset until the door is closed and the timer restarts; the fan speed adjustment module 23 is automatically set to a medium-low speed (2-3 m / s) to avoid a surge in energy consumption.

[0051] In a specific embodiment, the backup power supply 4 uses a lithium battery pack (48V / 20Ah). After the main power supply fails, it automatically switches to power supply within 0.1 seconds to ensure continuous operation of the system. When fully charged, it supports the fan to run at full speed for ≥45 minutes. It has low power protection: when the power is <20%, the temperature and humidity control function is disabled; when the power is <10%, only door status detection and basic start-stop control are maintained.

[0052] In a specific embodiment, when the wind speed adjustment module 23 is a frequency converter, the system dynamically adjusts the wind speed according to the duration of door opening: the fan starts at high speed (4-5m / s) at the moment of door opening to form an instantaneous wind wall; after the door is open for more than 30 seconds, the wind speed is reduced to medium speed (2.5-3m / s) in a stepwise manner; after the door is open for more than 120 seconds, it switches to low speed (1-2m / s). This strategy reduces energy consumption by an additional 22% while ensuring the barrier efficiency.

[0053] The air curtain system provided by this utility model has been described in detail above. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. Air curtain system, characterized in that include: Air curtain fan (1), the air curtain fan (1) is set above the channel opening and is used to generate air curtain airflow; Electric door (3), the electric door (3) is set at the passage entrance and is used to control the opening and closing of the passage entrance; An interlocking control device (2) is electrically connected to the air curtain fan (1) and the electric door (3). The interlocking control device (2) is configured to start the air curtain fan (1) when an electric door (3) opening signal is detected, and to stop the air curtain fan (1) when an electric door (3) closing signal is detected.

2. The air curtain system of claim 1, wherein: The interlocking control device (2) includes a signal detection module (21), which is used to detect the opening or closing status signal of the electric door (3).

3. The air curtain system of claim 1, wherein: The interlocking control device (2) also includes a control module (22), which is a programmable logic controller (PLC). The PLC controls the start and stop of the air curtain fan (1) according to the received signal.

4. The air curtain system of claim 1, wherein: The interlocking control device (2) also includes a wind speed adjustment module (23), which is connected to the air curtain fan (1) and is used to adjust the wind speed of the air curtain fan (1).

5. The air curtain system of claim 4, wherein: The wind speed adjustment module (23) is a frequency converter. The frequency converter adjusts the fan speed by changing the power frequency of the input air curtain fan (1), thereby adjusting the wind speed.

6. The air curtain system of claim 1, wherein: The air curtain fan (1) is a centrifugal fan.

7. The air curtain system of claim 1, wherein: It also includes a temperature sensor (6), which is located in the space where the air curtain system is located and is connected to the interlocking control device (2).

8. The air curtain system of claim 1, wherein: It also includes a humidity sensor (5), which is located in the space where the air curtain system is located and is connected to the interlocking control device (2).

9. The air curtain system of claim 1, wherein: It also includes a backup power supply (4), which is connected to the air curtain fan (1) and the interlocking control device (2).

10. The air curtain system according to claim 1, characterized in that: The electric door (3) is one of a roller shutter door, a swing door, or a sliding door.

Images