A multi-compartment pressure difference control system and control method for pharmaceutical plants

Abstract

The present application relates to a multi-compartment pressure differential control system for pharmaceutical factories, and relates to the field of pressure differential control systems, including a main pressure differential control module, a backup pressure differential control module, a hedge module, and a control module. The main pressure differential control module is used to keep the pressure differential in the compartment stable, the hedge module is used to control the air circulation between the compartment and the buffer chamber, the control module includes multiple pressure sensors and a controller, a pressure sensor is provided at the door of each compartment, the backup pressure differential control module includes a backup pipe, a backup blower, and a backup exhaust fan, one end of the backup pipe is connected to the backup blower, and the other end is connected to each compartment through a diversion pipe, the backup pipe is connected to the backup exhaust fan through a three-way joint, and the controller is used to control the operation of the backup blower and the backup exhaust fan. The present application has the effect of increasing the speed at which the pressure differential in the compartment returns to the state before the door is opened.

Description

Technical Field

[0001] The present application relates to the field of pressure differential control systems, and in particular to a multi-compartment pressure differential control system for pharmaceutical plants and a control method thereof. Background Art

[0002] In buildings used for special purposes, it's often necessary to manually control the difference between the building's internal air pressure and atmospheric pressure. For example, when treating highly infectious patients, the air pressure in the ward needs to be lowered to reduce the chance of pathogens escaping through the air. In the pharmaceutical industry, manually controlling the pressure differential within pharmaceutical plants is necessary to ensure product quality and reduce environmental pollution.

[0003] The relevant pharmaceutical plant structure is shown in the attached manual. Figure 1 , including multiple compartments 01, buffer rooms 02 and door bodies 03. Multiple compartments 01 are arranged in sequence, the buffer rooms 02 are connected to the compartments 01, and each compartment 01 is rotatably connected to a door body 03. The door body 03 is used to separate the buffer room 02 and the compartment 01. The relevant pressure difference control system includes an air inlet duct, a supply fan, an exhaust duct and an exhaust fan. The pressure difference control system is installed in compartment 01. There is a pressure difference between compartment 01 and buffer chamber 02, and there is a pressure difference between buffer chamber 02 and the atmospheric environment. One end of the air inlet duct is connected to the supply fan, and the other end is diverted through a duct. The diverted duct is connected to multiple compartments 01, and each compartment 01 is connected to the supply fan. One end of the exhaust duct is connected to the exhaust fan, and the other end is diverted through a duct. The diverted duct is connected to multiple compartments 01, and each compartment 01 is connected to the exhaust fan. The air supply fan and the exhaust fan are both installed in the atmospheric environment. The exhaust fan draws out the air in compartment 01 through the exhaust duct, and the air supply fan injects air into compartment 01 through the air supply duct. The user controls the amount of air entering compartment 01 from the air inlet duct and the amount of air discharged through the exhaust duct, thereby increasing or decreasing the air pressure in compartment 01, thereby achieving the effect of keeping the pressure difference in compartment 01 stable.

[0004] The above-mentioned related technical solutions have the following defects: there is a door in the compartment for people to enter and exit. After the door is opened and closed, the pressure difference between the compartment and the buffer chamber changes, so it takes a long time to adjust the pressure difference in the compartment to the state before the door is opened, causing inconvenience to the people in the compartment. Summary of the Invention

[0005] In order to increase the speed at which the pressure difference in the compartment returns to the state before the door is opened, the present application provides a multi-compartment pressure difference control system for a pharmaceutical factory and a control method thereof.

[0006] The present application provides a multi-compartment pressure differential control system for pharmaceutical plants that adopts the following technical solutions:

[0007] A multi-compartment pressure differential control system for a pharmaceutical factory includes a main pressure differential control module, a backup pressure differential control module, a hedging module and a control module. The main pressure differential control module is used to maintain a stable pressure differential in the compartment. The hedging module is used to control the air circulation between the compartment and the buffer chamber. The control module includes multiple pressure sensors and a controller. A pressure sensor is provided at the door of each compartment. The pressure sensor is electrically connected to the controller. The backup pressure differential control module includes a backup pipe, a backup blower and a backup exhaust fan. One end of the backup pipe is connected to the backup blower, and the other end is connected to each compartment through a diversion pipe. The backup pipe is connected to the backup exhaust fan through a three-way joint. The backup blower is used to send air from the atmospheric environment into the compartment, and the backup exhaust fan is used to extract the air in the compartment to the atmospheric environment. The controller is used to control the operation of the backup blower and the backup exhaust fan.

[0008] By adopting the above technical solution, a main pressure difference control module is set in the compartment, so that the main pressure difference control module can work for a long time, thereby keeping the air pressure in the compartment stable. By connecting the control module with the backup pressure difference control module, when the door of the compartment is opened and then closed, the pressure sensor transmits an electrical signal to the controller, and the controller can control the operation of the backup pressure difference control module. When the compartment with the open door is a positive pressure warehouse, the controller can control the backup blower to operate, so that the backup blower injects air into the compartment, so that the air pressure in the compartment rises faster, and thus the pressure difference between the compartment and the buffer chamber is quickly restored to a predetermined level. When the compartment with the open door is a negative pressure warehouse, the controller can control the backup exhaust fan to operate, so that the backup exhaust fan draws out the air in the compartment, thereby reducing the air pressure in the compartment, and can increase the speed at which the pressure difference in the compartment recovers to the state before the door is opened.

[0009] Optionally, a plurality of solenoid valves are provided on the spare pipeline, the solenoid valves are electrically connected to the controller, and the solenoid valves are used to control the flow direction of air in the spare pipeline.

[0010] By adopting the above technical solution, multiple solenoid valves are set on the spare pipeline to connect the controller with the solenoid valve. When the door of a compartment is opened, the controller can know the type of compartment through the electrical signal of the pressure sensor, thereby turning on the spare supply fan or spare exhaust fan. The controller can control the solenoid valve so that the spare supply fan or spare exhaust fan is only connected to one compartment, thereby making the spare pressure difference control module only work on the compartment with abnormal pressure difference, reducing the impact of the spare pressure difference control module on the pressure difference in other compartments.

[0011] Optionally, the hedging module includes a fan, an air duct, an elastic member and a driving member. The fan and the air duct are connected. The air duct runs through the wall between the compartment and the buffer chamber. The driving member is installed in the air duct. The driving member is located on the fan side of the fan away from the motor. The driving member is connected to the elastic member. The elastic member is located in the air duct. The driving member is used to drive the elastic member to move back and forth in a periodic manner along the length direction of the air duct.

[0012] By adopting the above technical solution, an air duct is provided on the wall between the compartment and the buffer chamber, so that the compartment and the buffer chamber can be connected through the air duct, and a fan is connected to the air duct so that the fan can circulate air between the compartment and the buffer chamber. When the compartment is a positive pressure warehouse, the air pressure in the compartment is higher than that in the buffer chamber. When the door is opened and then closed, the air pressure in the compartment decreases and the air pressure in the buffer chamber increases. The fan can inject the air in the buffer chamber into the compartment, thereby accelerating the air pressure increase speed in the compartment and accelerating the air pressure decrease speed in the buffer chamber. By arranging an elastic part on the driving part, the elastic part can be inserted into the air duct, and the elastic part can abut on the fan and deform to block the air duct, thereby reducing the probability of gas exchange between the compartment and the buffer chamber.

[0013] Optionally, a piston is slidably connected in the air duct, a driving member is connected to one end of the piston, an elastic member is connected to the other end of the piston, and the piston and the air duct are sealed.

[0014] By adopting the above technical solution, the piston is slidably connected in the air duct so that the piston can be sealed in the air duct. When the piston is inserted into the air duct, the channel in the air duct can be blocked, reducing the air exchange between the compartment and the buffer chamber.

[0015] Optionally, a plurality of air supply holes are provided on the outer wall of the air duct, and the air supply holes are provided at intervals along the circumference of the air duct.

[0016] By adopting the above technical solution, by opening an air supply hole on the outer wall of the air duct, the driving member can drive the piston to move so that the piston is located on different sides of the air supply hole, thereby achieving the effect of opening and closing the air duct. The piston is always sealed in the air duct during the movement, which can improve the reliability of the sealing connection between the piston and the air duct.

[0017] Optionally, the main pressure difference control module includes an air inlet duct, a supply air fan, an exhaust air duct and an exhaust fan, and the air inlet duct and the exhaust air duct are provided in plurality, and each compartment is connected to an air inlet duct and an exhaust air duct, and the end of the air inlet duct away from the compartment is connected to the supply air fan, and the end of the exhaust duct away from the compartment is connected to the exhaust fan.

[0018] By adopting the above technical solution, an air inlet duct is set in the compartment, so that the blower is connected to the compartment through the air inlet duct, so that the blower can continuously supply air into the compartment. By setting an exhaust duct in the compartment, the exhaust fan can continuously extract the air in the compartment. By adjusting the amount of air flowing into the air inlet duct and the amount of air flowing out of the exhaust duct, the air pressure in the compartment can be adjusted.

[0019] A control method for a multi-compartment pressure differential control system for a pharmaceutical plant comprises the following steps:

[0020] S1: Install a pressure sensor on the door of each compartment, connect the pressure sensor to the controller, and install a main pressure difference control module, a backup pressure difference control module and a hedging module in the compartment;

[0021] S2: Number the pressure sensors in the multiple compartments and write the numbers of the pressure sensors into the database of the controller;

[0022] S3: When the door is opened and then closed, the pressure sensor sends an electrical signal to the controller, and the controller controls the standby pressure difference control module and the hedging module to work.

[0023] By adopting the above technical solution and numbering the pressure sensors, users can install different pressure sensors in different types of compartments. When the pressure sensors in different compartments are triggered, the controller can control the operation of the backup supply fan or the backup exhaust fan after receiving the signal, thereby enabling the positive pressure compartment or the negative pressure compartment to adjust the pressure difference through the backup pressure difference control module.

[0024] A control method for a multi-compartment pressure differential control system for a pharmaceutical plant comprises the following steps:

[0025] S1: Install a pressure sensor on the door of each compartment, connect the pressure sensor to the controller, and install a main pressure difference control module, a backup pressure difference control module and a hedging module in the compartment;

[0026] S2: Number the pressure sensors in the multiple compartments and write the numbers of the pressure sensors into the database of the controller;

[0027] S3: When the door is opened and then closed, the pressure sensor sends an electrical signal to the controller, and the controller controls the operation of the standby pressure difference control module and the hedging module. The controller determines the type of compartment and controls the operation of the standby supply fan or the standby exhaust fan. The controller controls the operation of the solenoid valve so that the standby supply fan or the standby exhaust fan can only be connected to one compartment through the standby pipe.

[0028] By adopting the above technical solution, by connecting the controller to the solenoid valve, the controller can control the action of multiple solenoid valves. When the pressure sensor in a compartment sends an electrical signal, the controller can control the solenoid valve to connect the standby supply fan or standby exhaust fan to this compartment, so that the standby pressure difference control module only adjusts the pressure difference of one compartment, which can reduce the impact of the standby pressure difference control module on other compartments.

[0029] In summary, the beneficial technical effects of this application are:

[0030] 1. By setting a main pressure difference control module in the compartment, the main pressure difference control module can be operated for a long time, thereby keeping the air pressure in the compartment stable. By connecting the control module with the backup pressure difference control module, when the door of the compartment is opened and then closed, the pressure sensor transmits an electrical signal to the controller, and the controller can control the operation of the backup pressure difference control module. When the compartment with the open door is a positive pressure warehouse, the controller can control the backup blower to operate, so that the backup blower injects air into the compartment, so that the air pressure in the compartment rises faster, and thus the pressure difference between the compartment and the buffer chamber is quickly restored to a predetermined level. When the compartment with the open door is a negative pressure warehouse, the controller can control the backup exhaust fan to operate, so that the backup exhaust fan extracts the air in the compartment, thereby reducing the air pressure in the compartment, which can increase the speed at which the pressure difference in the compartment recovers to the state before the door is opened.

[0031] 2. By arranging an air duct on the wall between the compartment and the buffer chamber, the compartment and the buffer chamber can be connected through the air duct. By connecting a fan to the air duct, the fan can circulate air between the compartment and the buffer chamber. When the compartment is a positive pressure warehouse, the air pressure in the compartment is higher than that in the buffer chamber. When the door is opened and then closed, the air pressure in the compartment decreases and the air pressure in the buffer chamber increases. The fan can inject the air in the buffer chamber into the compartment, thereby accelerating the air pressure increase rate in the compartment and the air pressure decrease rate in the buffer chamber. By arranging an elastic part on the driving part, the elastic part can be inserted into the air duct, and the elastic part can abut on the fan and deform to block the air duct, thereby reducing the chance of gas exchange between the compartment and the buffer chamber.

[0032] 3. By numbering the pressure sensors, users can install different pressure sensors in different types of compartments. When the pressure sensors in different compartments are triggered, the controller can control the standby supply fan or standby exhaust fan after receiving the signal, so that the positive pressure compartment or negative pressure compartment can adjust the pressure difference through the standby pressure difference control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the positional relationship of existing compartments and buffer rooms.

[0034] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0035] Figure 3 2 is a schematic structural diagram of the backup pressure difference control module according to an embodiment of the present application.

[0036] Figure 4 It is the logic box of the control module and the standby pressure difference control module of the embodiment of the present application. Figure 1 .

[0037] Figure 5 It is a schematic diagram of the connection structure of the bottom plate and the side plate of an embodiment of the present application.

[0038] Figure 6 It is a schematic diagram of the installation position of the skeleton of the embodiment of the present application.

[0039] Figure 7 It is the logic box of the control module and the standby pressure difference control module of the embodiment of the present application. Figure 2 .

[0040] Figure 8 It is a structural diagram of the hedging module of an embodiment of the present application.

[0041] Figure 9 It is a partial cross-sectional schematic diagram of the hedging module according to an embodiment of the present application.

[0042] Figure markings: 01, compartment; 02, buffer chamber; 03, door body; 1, main pressure difference control module; 11, air inlet duct; 12, air supply fan; 13, exhaust duct; 14, exhaust fan; 2, spare pressure difference control module; 21, spare duct; 211, main duct; 212, connecting pipe; 22, spare air supply fan; 23, spare exhaust fan; 24, solenoid valve; 3, hedge module; 31, fan; 311, fan; 312, shell; 32, air duct; 321, air supply hole; 33, elastic part; 34, piston; 35, driving part; 4, control module; 41, pressure sensor; 42, controller; 51, bottom plate; 52, side plate; 6, reinforcement structure; 61, sealing layer; 62, skeleton; 63, sealing layer. DETAILED DESCRIPTION

[0043] The present application is further described in detail below with reference to the accompanying drawings.

[0044] The present application discloses a multi-compartment pressure difference control system and a control method thereof for a pharmaceutical factory. Figure 2 、 Figure 3 and Figure 4 , including a main pressure difference control module 1, a backup pressure difference control module 2, a hedging module 3 and a control module 4. The main pressure difference control module 1 is used to adjust the air pressure difference in each compartment 01. The control module 4 includes multiple pressure sensors 41 and a controller 42. The pressure sensor 41 is arranged at the door frame of the door body 03. A pressure sensor 41 is installed in each compartment 01. When the door body 03 is opened and the compartment 01 is connected with the buffer chamber 02, the pressure sensor 41 can send an electrical signal to start the backup pressure difference control module 2 and the hedging module 3. The backup pressure difference control module 2 and the hedging module 3 are used to increase the pressure difference between the compartment 01 and the buffer chamber 02. After the door body 03 is opened and then closed, the backup pressure difference control module 2 and the hedging module 3 are operated, so that the pressure difference between the compartment 01 and the buffer chamber 02 can be quickly restored to the state before the door body 03 is opened, thereby ensuring a stable environment for production work.

[0045] Reference Figure 5 and Figure 6 The compartment 01 includes a plurality of bottom plates 51 and a plurality of side plates 52. The bottom plates 51 are arranged horizontally, and the side plates 52 are arranged vertically and abut against the bottom plates 51. Precast concrete slabs can be used for the bottom plates 51 and the side plates 52, thereby improving construction efficiency. A reinforcement structure 6 is provided between the bottom plate 51 and the side plates 52. The reinforcement structure 6 includes a sealing layer 61, a skeleton 62 and a sealing layer 63. The sealing layer 61 is formed by solidifying cement mortar with good fluidity. When the cement mortar is applied to the bottom plate 51 and is located on one side of the side plate 52, the cement mortar has good fluidity and can penetrate into the gap between the bottom plate 51 and the side plate 52, thereby filling the space between the bottom plate 51 and the side plate 52 more fully. The frame 62 is provided on the bottom plate 51. The frame 62 is located on the side of the sealing layer 61 away from the side panels 52. The frame 62 is formed by welding a plurality of steel bars together. The plurality of steel bars are vertically connected to each other. The frame 62 formed by the plurality of steel bars is a columnar structure. The frame 62 is horizontally abutted against the side panels 52. The sealing layer 63 is formed by pouring cement mortar with good density. When pouring the cement mortar, the sealing layer 61 and the frame 62 are submerged. The sealing layer 63 formed after the cement mortar solidifies has good density, thereby further improving the airtightness of the connection between the bottom plate 51 and the side panels 52. The frame 62 can enhance the structural strength of the sealing layer 63, so that the sealing layer 63 can support the edge of the side panels 52 and improve the overall structural strength of the compartment 01.

[0046] Reference Figure 2 The main pressure differential control module 1 includes an air inlet duct 11, a blower 12, an exhaust duct 13, and an exhaust fan 14. Multiple air inlet ducts 11 and exhaust ducts 13 are provided, with each compartment 01 connected to one air inlet duct 11 and one exhaust duct 13. One end of the air inlet duct 11 extends through the side wall of compartment 01, and the other end connects to other air inlet ducts 11 and is connected to the blower 12. The blower 12 is installed in the outdoor atmosphere and delivers air to the compartment 01 through the air inlet duct 11. One end of the exhaust duct 13 passes through the side wall of the compartment 01, and the other end is connected to other exhaust ducts 13 and connected to the exhaust fan 14. The exhaust fan 14 is set in the outdoor atmospheric environment. The exhaust fan 14 draws out the air in the compartment 01 through the exhaust duct 13, and forms a flow difference between the air flow flowing into the compartment 01 through the air inlet duct 11 and the air flow flowing out through the exhaust duct 13, so that the air in the compartment 01 is compressed or expanded, thereby achieving the effect of adjusting the air pressure in the compartment 01.

[0047] Reference Figure 3 、 Figure 4 and Figure 7The standby pressure differential control module 2 includes a standby pipeline 21, a standby blower 22, a standby exhaust fan 23, and multiple solenoid valves 24. The standby pipeline 21 includes a main pipeline 211 and two connecting pipes 212. The main pipeline 211 has multiple openings, each of which is connected to a compartment 01 through a pipeline. The solenoid valves 24 are installed on the main pipeline 211, with a solenoid valve 24 positioned between two adjacent openings. The end of the main pipeline 211 away from the compartment 01 is connected to the connecting pipe 212. The two connecting pipes 212 are connected to the main pipeline 211 via a T-joint. One connecting pipe 212 is connected to the standby blower 22, and the other connecting pipe 212 is connected to the standby exhaust fan 23. The standby blower 22 and the standby exhaust fan 23 are arranged in an outdoor atmosphere.

[0048] Reference Figure 4 and Figure 7 When the door body 03 of compartment 01 is opened and closed, the pressure sensor 41 installed in compartment 01 is activated, and the pressure sensor 41 sends an electrical signal to the controller 42. The controller 42 receives the electrical signal of the pressure sensor 41 and determines whether the compartment 01 with the door body 03 opened is a positive pressure warehouse or a negative pressure warehouse. When the compartment 01 is a positive pressure warehouse, the controller 42 controls the standby blower 22 to start, so that the standby blower 22 supplies air to the compartment 01, thereby increasing the air pressure in the compartment 01. When the compartment 01 is a negative pressure warehouse, the controller 42 controls the standby exhaust fan 23 to start, so that the standby exhaust fan 23 extracts the air in the compartment 01, thereby reducing the air pressure in the compartment 01.

[0049] Reference Figure 7 When the door 03 of compartment 01 is opened and closed, the pressure sensor 41 installed in compartment 01 sends an electrical signal, the controller 42 receives the electrical signal and identifies the location of compartment 01, and the controller 42 controls the solenoid valve 24 to operate, so that the standby blower 22 or the standby exhaust fan 23 is connected only to this compartment 01 through the standby pipe 21.

[0050] Reference Figure 8 and Figure 9The hedging module 3 includes a fan 31, an air duct 32, an elastic member 33, a piston 34 and a driving member 35. The fan 31 includes a fan 311 and a shell 312. The fan 311 is rotatably connected to the shell 312. The shell 312 is a cylindrical structure. A motor is provided in the shell 312. The output shaft of the motor is connected to the fan 311. The motor is used to drive the fan 311 to rotate. The air duct 32 is coaxially connected to the shell 312. The air duct 32 is located on the side of the shell 312 away from the motor. The air duct 32 is fixed to the shell 312 by welding. A through hole is opened on the wall between the compartment 01 and the buffer chamber 02. The air duct 32 is inserted into the through hole. The air duct 32 is sealed to the wall. The fan 31 is located in the buffer chamber 02. The drive member 35 can be an electric push rod or a hydraulic cylinder. The drive member 35 is coaxially arranged on the side of the fan 311 away from the motor. One end of the drive member 35 is fixedly connected to the air duct 32, and the other end is fixedly connected to the piston 34. The piston 34 is slidably connected in the air duct 32, and the piston 34 and the air duct 32 are sealed. The elastic member 33 can be made of an elastic material such as silicone, rubber, or sponge. The elastic member 33 is configured as a cylindrical structure and is inserted into the air duct 32. The elastic member 33 and the piston 34 are connected by adhesive. The drive member 35 can drive the piston 34 to slide back and forth in the air duct 32. The sidewall of the air duct 32 is provided with a plurality of air supply holes 321, spaced evenly along the circumference of the air duct 32. When the driver 35 drives the piston 34 and the elastic member 33 to move to the side of the air supply hole 321 away from the fan 31, the compartment 01 and the buffer chamber 02 are connected through the air duct 32 and the air supply hole 321. At this time, the fan 31 is activated, allowing air to circulate between the compartment 01 and the buffer chamber 02. When the driver 35 drives the piston 34 to move, causing the elastic member 33 to abut against the fan 311, the piston 34 blocks the air duct 32, thereby isolating the compartment 01 and the buffer chamber 02. The fan 311 and the piston 34 squeeze the elastic member 33, causing it to deform and block the air duct 32, further improving the sealing performance of the air duct 32.

[0051] Reference Figure 8 and Figure 9 When compartment 01 is a positive pressure warehouse, that is, the air pressure in compartment 01 needs to be maintained at a higher level, and the air pressure in buffer chamber 02 needs to be maintained at a lower level, the fan 31 is configured to extract air from buffer chamber 02 and inject it into compartment 01. When door body 03 is opened and then closed, the pressure difference between compartment 01 and buffer chamber 02 decreases, and fan 31 starts. At this time, air flows from compartment 01 to buffer chamber 02 in air duct 32, thereby increasing the amount of air in compartment 01 and raising the air pressure, while reducing the amount of air in buffer chamber 02 and lowering the air pressure. The hedging module 3 can simultaneously adjust the air pressure in compartment 01 and buffer chamber 02, so that the pressure difference between compartment 01 and buffer chamber 02 is quickly adjusted to a predetermined level.

[0052] Reference Figure 8 and Figure 9 When compartment 01 is a negative pressure chamber, that is, the air pressure in compartment 01 needs to be kept at a low level, while the air pressure in buffer chamber 02 needs to be kept at a high level, fan 31 is configured to extract air from compartment 01 and inject it into buffer chamber 02. When door 03 is opened and then closed, fan 31 starts, and air flows from buffer chamber 02 into compartment 01 through air duct 32, thereby reducing the amount of air in compartment 01 and lowering the air pressure, while increasing the amount of air in buffer chamber 02 and raising the air pressure.

[0053] The implementation principle of the embodiment of the present application is: by setting a backup pressure difference control module 2 in the compartment 01, setting a pressure sensor 41 on the door body 03, and triggering the pressure sensor 41 when the user opens and closes the door body 03, so that the backup pressure difference control module 2 works, which can speed up the recovery speed of the pressure difference between the compartment 01 and the buffer chamber 02, and reduce the impact of opening and closing the door body 03 on the air pressure in the compartment 01; by setting a hedge module 3 between the compartment 01 and the buffer chamber 02, the hedge module 3 can connect and disconnect the air circulation between the compartment 01 and the buffer chamber 02; when the door body 03 is opened and then closed, the hedge module 3 connects the compartment 01 and the buffer chamber 02, thereby allowing the air to flow between the compartment 01 and the buffer chamber 02, so that the pressure difference between the compartment 01 and the buffer chamber 02 is quickly restored to the state before the door body 03 is opened.

[0054] The present application also discloses a method for controlling a multi-compartment pressure differential control system for a pharmaceutical plant, comprising the following steps:

[0055] S1: Install a pressure sensor 41 at the door 03 of each compartment 01, connect the controller 42 to the pressure sensor 41, and install a main pressure difference control module 1, a backup pressure difference control module 2 and a hedging module 3 in the compartment 01;

[0056] S2: Number the pressure sensors 41 and the solenoid valves 24 in the multiple compartments 01, write the numbers of the pressure sensors 41 in the database in the controller 42, and store the switch status data of the multiple solenoid valves 24 that can connect any compartment 01 with the standby supply fan 22 or the standby exhaust fan 23. When the door body 03 is opened, the pressure sensor 41 sends an electrical signal to the controller 42. When the door body 03 is closed, the pressure sensor 41 sends an electrical signal to the controller 42 again. The controller 42 records the duration of the door body 03 being open, and controls the standby pressure difference control module 2 and the hedging module 3 to automatically disconnect after working for a certain period of time.

[0057] S3: When a corresponding pressure sensor 41 is activated, the controller 42 identifies whether the compartment 01 where the pressure sensor 41 is located is a positive pressure compartment or a negative pressure compartment according to the number of the pressure sensor 41, and starts the standby pressure difference control module 2 and the hedging module 3.

[0058] S31: When the standby pressure difference control module 2 is turned on, the controller 42 identifies the type of compartment 01 and turns on the standby supply fan 22 or the standby exhaust fan 23 accordingly. At the same time, the controller 42 reads the data in the database and controls the operation of multiple solenoid valves 24, so that the compartment 01 with only the door body 03 in operation is connected to the standby supply fan 22 or the standby exhaust fan 23.

[0059] The implementation principle of the embodiment of the present application is: by enabling the control module 4 to control the standby pressure difference control module 2 and the hedging module 3, when the door body 03 of a certain compartment 01 is opened and then closed, the controller 42 can identify the type of compartment 01 where the door body 03 is located, thereby turning on the standby supply fan 22 or the standby exhaust fan 23, and the controller 42 can control the operation of multiple solenoid valves 24, thereby making the standby pressure difference control module 2 only connected to the compartment 01 where the door body 03 is operating, thereby achieving the effect of saving energy.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-compartment pressure differential control system for a pharmaceutical plant, characterized in that: The invention comprises a main pressure difference control module (1), a standby pressure difference control module (2), a counter module (3) and a control module (4), wherein the main pressure difference control module (1) is used to keep the pressure difference in the compartment (01) stable, the counter module (3) is used to control the air flow between the compartment (01) and the buffer chamber (02), the control module (4) comprises a plurality of pressure sensors (41) and a controller (42), a pressure sensor (41) is provided at the door (03) of each compartment (01), and the pressure sensor (41) is electrically connected to the controller (42), the standby pressure difference control module (2) comprises a standby pipe (21), a standby air supply fan (22) and a standby exhaust fan (23), the standby pipe (21) is provided with a plurality of pressure sensors (41) and a controller (42), and the standby pressure difference control module (2) comprises a standby pipe (21), a standby air supply fan (22) and a standby exhaust fan (23), and the standby pipe (21) is provided with a plurality of pressure sensors (41) and a controller (42). One end is connected to the standby blower (22), and the other end is connected to each compartment (01) through a diversion pipe. The standby pipe (21) is connected to the standby exhaust fan (23) through a three-way joint. The standby blower (22) is used to send air from the atmospheric environment into the compartment (01), and the standby exhaust fan (23) is used to extract the air in the compartment (01) to the atmospheric environment. The controller (42) is used to control the operation of the standby blower (22) and the standby exhaust fan (23). A plurality of solenoid valves (24) are provided on the standby pipe (21), and the solenoid valves (24) are electrically connected to the controller (42). The solenoid valves (24) are used to control the flow direction of air in the standby pipe (21). The method further includes the following steps: S1: Install a pressure sensor (41) at the door (03) of each compartment (01), connect the pressure sensor (41) to the controller (42), and install a main differential pressure control module (1), a backup differential pressure control module (2), and a hedging module (3) in the compartment (01); S2: Numbering the pressure sensors (41) in the plurality of compartments (01), and writing the numbers of the pressure sensors (41) into a database of the controller (42); S3: When the door body (03) is opened and then closed, the pressure sensor (41) sends an electrical signal to the controller (42), and the controller (42) controls the standby pressure difference control module (2) and the offset module (3) to operate.

2. A multi-compartment pressure differential control system for a pharmaceutical factory according to claim 1, characterized in that: The hedging module (3) includes a fan (31), an air duct (32), an elastic member (33) and a driving member (35). The fan (31) and the air duct (32) are connected. The air duct (32) passes through the wall between the compartment (01) and the buffer chamber (02). The driving member (35) is installed in the air duct (32). The driving member (35) is located on the fan of the fan (31) away from the motor. The driving member (35) is connected to the elastic member (33). The elastic member (33) is located in the air duct (32). The driving member (35) is used to drive the elastic member (33) to move back and forth along the length direction of the air duct (32).

3. A multi-compartment pressure differential control system for a pharmaceutical factory according to claim 2, characterized in that: A piston (34) is slidably connected in the air duct (32), a driving member (35) is connected to one end of the piston (34), an elastic member (33) is connected to the other end of the piston (34), and the piston (34) and the air duct (32) are sealed.

4. A multi-compartment pressure differential control system for a pharmaceutical factory according to claim 3, characterized in that: A plurality of air supply holes (321) are provided on the outer wall of the air duct (32), and the air supply holes (321) are provided at intervals along the circumference of the air duct (32).

5. The multi-compartment pressure differential control system for a pharmaceutical factory according to claim 1, characterized in that: The main pressure difference control module (1) comprises an air inlet duct (11), a blower (12), an exhaust duct (13) and an exhaust fan (14), wherein the air inlet duct (11) and the exhaust duct (13) are provided in plurality, and each compartment (01) is connected to an air inlet duct (11) and an exhaust duct (13), and an end of the air inlet duct (11) away from the compartment (01) is connected to the air supply fan (12), and an end of the exhaust duct (13) away from the compartment (01) is connected to the exhaust fan (14).

6. A control method for a multi-compartment pressure differential control system for a pharmaceutical factory according to claim 2, characterized in that: The steps include: S1: Install a pressure sensor (41) at the door (03) of each compartment (01), connect the pressure sensor (41) to the controller (42), and install a main differential pressure control module (1), a backup differential pressure control module (2), and a hedging module (3) in the compartment (01); S2: Numbering the pressure sensors (41) in the plurality of compartments (01), and writing the numbers of the pressure sensors (41) into a database of the controller (42); S3: When the door body (03) is opened and then closed, the pressure sensor (41) sends an electrical signal to the controller (42), and the controller (42) controls the standby pressure difference control module (2) and the offset module (3) to operate. The controller (42) determines the type of the compartment (01) and controls the standby air supply fan (22) or the standby exhaust fan (23) to operate. The controller (42) controls the solenoid valve (24) to operate so that the standby air supply fan (22) or the standby exhaust fan (23) can only communicate with one compartment (01) through the standby pipe (21).

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