Air shower control system

Abstract

The utility model relates to an air shower control system comprising a PLC controller, the PLC controller is respectively connected with a front door electronic lock, a rear door electronic lock, an optical sensor and an exhaust fan, the optical sensor sends a shielding signal to the PLC controller after detecting the shielding signal, and the exhaust fan sends the shielding signal to the PLC controller. The PLC receives the shielding signal and door closing signals of the front door electronic lock and the rear door electronic lock and then controls the exhaust fan to be started, a primary filter is arranged at an air inlet of an air channel where the exhaust fan is located, a high-efficiency filter is arranged at the position, located on the air outlet side of the exhaust fan, in the air channel, and a plurality of air shower nozzles are arranged at an air outlet of the air channel. According to the air shower control system, through signal monitoring of the front door electronic lock, the rear door electronic lock and the optical sensor, the PLC intelligently controls opening and closing of the front door, the rear door and the air shower process, automatic control over the air shower is achieved, and the problem that the rear door is opened by mistake due to human errors is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air showers, and particularly relates to an air shower control system. Background Art

[0002] An air shower, also known as an air rinse, a clean air shower, a purification air shower, an air shower room, a blow-off room, an air shower door, a dust bath room, a blow-off chamber, an air shower passage, and an air blow-off chamber, is a necessary passage for entering a clean room, which can reduce the pollution problems brought about by entering and leaving the clean room. The air shower includes structures such as a front door, a back door, and an air shower wall. The front door is arranged on the outermost side, and the back door is arranged between the air shower wall and the clean room. When people and goods need to enter the clean area, they need to be blown by the air shower. The clean air blown out can remove the dust carried by people and goods, effectively block or reduce the dust source from entering the clean area. Only people or objects purified by the air shower wall can pass through the back door. When the staff enters the air shower, there will be a situation where there is no air shower or the back door is accidentally opened during the air shower process, causing the polluted air in the air shower to enter the clean room, polluting the clean room or damaging precision instruments. Content of the Utility Model

[0003] An embodiment of the utility model provides an air shower control system to solve the problem that the back door of the air shower is accidentally opened due to the misoperation of the staff in the prior art.

[0004] To achieve the above object, the embodiment of the utility model provides the following technical solutions:

[0005] An air shower control system includes a PLC controller, which is respectively connected to a front door electronic lock, a back door electronic lock, a light sensor, and an exhaust fan. After the light sensor detects an occlusion signal, it sends it to the PLC controller. After the PLC controller receives the occlusion signal, the closing signals of the front door electronic lock and the back door electronic lock, it controls the exhaust fan to start. An initial filter is provided at the air inlet of the air duct where the exhaust fan is located, a high-efficiency filter is provided on the air outlet side of the exhaust fan in the air duct, and a plurality of air shower nozzles are provided at the air outlet of the air duct.

[0006] Further, the PLC controller is connected to an acoustic alarm or an optical alarm provided on the front door and / or the back door.

[0007] Further, the PLC controller is connected to an emergency switch provided on the back door

[0008] Further, the PLC controller is connected to an air quality sensor provided in the air shower room.

[0009] Further, a hair dryer is provided in the air duct. The air outlet side of the hair dryer corresponds to the primary filter. An auxiliary air duct communicating with the air duct is provided on the air inlet side of the hair dryer. A first electric air damper is provided in the auxiliary air duct, and a second electric air damper is provided in the air duct.

[0010] Further, the first electric air damper includes a first motor, a first slide plate, a first driving gear and a first rack. The first rack is inserted into the auxiliary air duct and is used to block the auxiliary air duct. The driving end of the first rack is provided with a first driving gear. The first rack is meshed with the first driving gear, and the first motor drives the first driving gear to rotate.

[0011] Further, a first guiding structure for guiding the movement of the first slide plate is provided in the auxiliary air duct.

[0012] Further, the second electric air damper includes a second motor, a second slide plate, a second driving gear and a second rack. The second rack is inserted into the air duct and is used to block the air duct. The driving end of the second rack is provided with a second driving gear. The second rack is meshed with the second driving gear, and the second motor drives the first driving gear to rotate.

[0013] Further, a second guiding structure for guiding the movement of the second slide plate is provided in the air duct.

[0014] The embodiment of the present utility model has the following advantages:

[0015] The air shower control system of the present utility model monitors the signals of the front door electronic lock, the rear door electronic lock and the optical sensor, and the PLC controller intelligently controls the opening and closing of the front and rear doors and the air shower process, realizing the automatic control of the air shower and avoiding the problem of accidentally opening the rear door due to human error.

[0016] The air shower control system of the present utility model adds an emergency switch, solves the disadvantages of the traditional interlocking of the front and rear doors, enables the staff in the clean room to directly and quickly pass through the air shower, and avoids the problem of missing the escape opportunity due to the obstruction of the air shower.

[0017] The air shower control system of the present utility model is provided with an air quality sensor for monitoring the pollutant concentration in the air of the air shower room, ensuring the air shower effect and effectively avoiding the problem of residual impurities entering the clean room.

[0018] The air shower control system of the present utility model adds an auxiliary air duct for blowing air. When the front door of the air shower is opened, the air in the air shower is blown outwards, avoiding the entry of external polluted air into the air shower with people or objects, and avoiding the increase in the air pollution degree in the air shower, so as to improve the service life of the filter. Description of the Drawings

[0019] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained by extending the provided drawings.

[0020] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

[0021] Figure 1 It is a structure diagram of an air shower control system provided in Embodiment 1 of the present utility model;

[0022] Figure 2 It is a control principle diagram of an air shower control system provided in Embodiment 1 of the present utility model;

[0023] Figure 3 It is a circuit diagram of an air shower control system provided in Embodiment 1 of the present utility model;

[0024] Figure 4 It is a control expansion principle diagram of an air shower control system provided in Embodiment 1 of the present utility model;

[0025] Figure 5 It is an internal side view of an air shower control system provided in Embodiment 2 of the present utility model;

[0026] Figure 6 It is a structure diagram of an auxiliary air duct in an air shower control system provided in Embodiment 2 of the present utility model.

[0027] In the figure:

[0028] 1. PLC controller; 2. Front door electronic lock; 3. Rear door electronic lock; 4. Light sensor; 5. Exhaust fan; 6. Sound and light alarm; 7. Air shower nozzle; 8. Primary filter; 9. High-efficiency filter; 10. Air quality sensor; 11. Emergency switch; 12. Air duct; 13. Blower; 14. Auxiliary air duct; 15. First electric air damper; 16. First motor; 17. First slide plate; 18. First driving gear; 19. First rack; 20. Second electric air damper; 21. Second motor; 22. Second slide plate; 23. Second driving gear; 24. Second rack. Detailed implementation manners

[0029] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1

[0031] As Figures 1-5 shown, an air shower control system includes a PLC controller 1, and the PLC controller 1 is respectively connected to a front door electronic lock 2, a rear door electronic lock 3, a light sensor 4, and an exhaust fan 5.

[0032] The PLC controller 1 first receives an opening application signal from the front door electronic lock 2. The PLC controller 1 will detect the situation of the rear door electronic lock 3. If the rear door electronic lock 3 is in an open state at this time, the front door electronic lock 2 will not be opened, and a sound or light will be emitted to remind the person waiting to enter at the front door and / or the staff in the clean room at the rear door, such as setting an audible and visual alarm 6 outside the front door and / or at the rear door; if the PLC controller 1 detects that the rear door electronic lock 3 is in a closed state or receives a closing signal of the rear electronic lock after the alarm, the alarm will be turned off, and the front door electronic lock 2 will be controlled to open. At this time, the front door opens, and people or objects can enter the air shower. Figure 3 This is the circuit diagram of this technology, where the working indicator light includes the audible and visual alarm 6.

[0033] The light sensor 4 is used to detect whether there is a person or object blocking. A matching light emitter is provided on the corresponding side of the light sensor 4. The light sensor 4 senses the light emitted by the light emitter. If the light sensor 4 detects that there is a person or object blocking the light, it means that a person or object has entered the air shower. The light sensor 4 sends a blocking signal to the PLC controller 1. In this embodiment, the light sensor 4 can also be other sensors that can detect whether there is a person or object in the air shower, such as an infrared light sensor 4, etc.

[0034] When the PLC controller 1 receives the blocking signal and the closing signal of the front door electronic lock 2, the air shower process can start. Air shower nozzles 7 can be arranged in three directions: left, right, and top in the air shower. Three air shower modes, namely single-sided blowing, double-sided blowing, and three-sided blowing, can be set, and parameters such as the waiting time, air shower duration, wind speed, and air volume can also be adjusted. These parameters are initially set by the manufacturer, and then the user can adjust them by himself, such as adjusting the time relay to change the air shower duration. Since the dust blown off from people or objects and the dust in the air shower will both fall, an air suction port of an air duct 12 is provided at the bottom of the air shower, and a primary filter 8 is provided at the air suction port.

[0035] A suction fan 5 and a high-efficiency filter 9 are arranged in the air duct 12. The gas in the air shower room is sucked into the air duct 12 by the suction fan 5. First, the primary filter 8 at the opening of the air duct 12 filters out impurities such as particulate matter, and then the high-efficiency filter 9 filters the fine particles in the air. Finally, the clean air is blown out through a number of air shower nozzles 7. After the air shower ends, the PLC controller 1 controls the rear door electronic lock 3 to open, and people or objects can enter the clean room. The suction fan 5 can adopt a fan with the model TLYD4250, and the maximum wind speed can reach up to 20 m / s.

[0036] In order to prevent the air shower from ending before the residual impurities in the air shower room are removed, an air quality sensor 10 can be arranged in the air shower room to monitor the pollutant concentration in the air in the air shower room. When the air quality in the air shower room increases to above the threshold and remains unchanged for a certain period of time, such as 5 seconds, the air shower stops.

[0037] The air shower control system in this technology is not the traditional front and rear door interlock. Since accidents such as fires, earthquakes, and explosions may occur during daily work, if the front and rear doors are interlocked, the rear door cannot be opened when the front door is opened. Therefore, an emergency switch 11 is arranged outside the rear door in this technology. If the emergency switch 11 is pressed, the sound and light alarm 6 will start to alarm, and the PLC controller 1 will control both the front door electronic lock 2 and the rear door electronic lock 3 to open, enabling the staff in the clean room to directly and quickly pass through the air shower room, avoiding the problem of missing the escape opportunity due to the obstruction of the air shower room.

[0038] Embodiment 2

[0039] When the front door of the air shower room is opened, it is easy to bring external polluted air into the air shower room, increasing the air pollution degree in the air shower room and thus shortening the service life of the filter. To solve this problem, as Figure 6As shown in the figure, a hair dryer 13 is provided in the air duct 12 of the present technology. The air outlet side of the hair dryer 13 corresponds to the primary filter 8, that is, the hair dryer 13 and the exhaust fan 5 share an air passing port. An auxiliary air duct 14 communicating with the air duct 12 is provided on the air inlet side of the hair dryer 13. The air inlet of the auxiliary air duct 14 is arranged on the outer surface of the air shower room and is provided with an external primary filter 8. A first electric air damper 15 is provided in the auxiliary air duct 14, and a second electric air damper 20 is provided in the air duct 12. When the external electronic lock is opened, the first electric door is opened, the second electric door is closed, the hair dryer 13 is turned on, and the exhaust fan 5 is not turned on. At this time, the hair dryer 13 blows air to blow the air in the air shower room outwards to prevent external air from entering the air shower room. After the front door electronic lock 2 is closed, the hair dryer 13 is turned off, and the first electric door is closed. At this time, if a blocking signal is detected, the second electric door is opened for air shower. The present technology transfers part of the filtering work that should be done by the internal filter of the air shower room to external filtering, which is convenient for the replacement of the primary filter 8 and avoids the problem of secondary pollution in the air shower room caused by the replacement of the primary filter 8.

[0040] The first electric air damper 15 includes a first motor 16, a first slide plate 17, a first driving gear 18 and a first rack 19. The first motor 16 is connected to the PLC controller 1 for controlling the opening and closing of the first electric air damper 15. The first rack 19 is inserted into the auxiliary air duct 14 and is used for blocking the auxiliary air duct 14. A first driving gear 18 is provided at the driving end of the first rack 19. The first rack 19 is meshed with the first driving gear 18, and the first motor 16 drives the first driving gear 18 to rotate. A first guiding structure for guiding the movement of the first slide plate 17 is provided in the auxiliary air duct 14.

[0041] The second electric air damper 20 includes a second motor 21, a second slide plate 22, a second driving gear 23 and a second rack 24. The second motor 21 is connected to the PLC controller 1 for controlling the opening and closing of the second electric air damper 20. The second rack 24 is inserted into the air duct 12 and is used for blocking the air duct 12. A second driving gear 23 is provided at the driving end of the second rack 24. The second rack 24 is meshed with the second driving gear 23, and the second motor 21 drives the second driving gear 23 to rotate. A second guiding structure for guiding the movement of the second slide plate 22 is provided in the air duct 12.

[0042] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. An air shower control system, characterized in that: It includes a PLC controller, which is respectively connected to the front door electronic lock, the rear door electronic lock, the light sensor, and the exhaust fan. The light sensor detects a blocking signal and sends it to the PLC controller. The PLC controller controls the exhaust fan to start after receiving the blocking signal and the closing signal of the front door electronic lock and the rear door electronic lock. A primary filter is provided at the air inlet of the air duct where the exhaust fan is located, a high-efficiency filter is provided at the air outlet side of the exhaust fan in the air duct, and a plurality of air shower nozzles are provided at the air outlet of the air duct.

2. The air shower control system according to claim 1, characterized in that: The PLC controller is connected to a sound alarm or a light alarm arranged on the front door and / or the rear door.

3. The air shower control system according to claim 1, characterized in that: The PLC controller is connected to an emergency switch arranged on the rear door.

4. The air shower control system according to claim 1, characterized in that: The PLC controller is connected to an air quality sensor arranged in the air shower room.

5. The air shower control system according to claim 1, characterized in that: A hair dryer is arranged in the air duct, the air outlet side of the hair dryer corresponds to the primary filter, the air inlet side of the hair dryer is arranged with an auxiliary air duct connected with the air duct, the auxiliary air duct is arranged with a first electric damper, and the air duct is arranged with a second electric damper.

6. The air shower control system according to claim 5, characterized in that: The first electric damper includes a first motor, a first slide plate, a first driving gear and a first rack. The first rack is inserted into the auxiliary air duct and is used to block the auxiliary air duct. The driving end of the first rack is provided with a first driving gear. The first rack is meshed and connected to the first driving gear. The first motor drives the first driving gear to rotate.

7. The air shower control system according to claim 6, characterized in that: A first guiding structure for guiding the movement of the first slide plate is arranged in the auxiliary air duct.

8. The air shower control system according to claim 5, characterized in that: The second electric damper includes a second motor, a second slide plate, a second driving gear and a second rack. The second rack is inserted into the air duct and is used to block the air duct. The driving end of the second rack is provided with a second driving gear. The second rack is meshed and connected to the second driving gear. The second motor drives the second driving gear to rotate.

9. The air shower control system according to claim 8, characterized in that: A second guiding structure for guiding the movement of the second slide plate is arranged in the air duct.

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