CN117267912A

CN117267912A - Constant-pressure variable air volume control method and related device for barrier-level experimental animal house

Info

Publication number: CN117267912A
Application number: CN202311057668.5A
Authority: CN
Inventors: 季金星; 汪亚兵; 欧少华; 刘吉宏; 张启进
Original assignee: Shanghai Chuntian Laboratory Equipment Co ltd; Kaichun Clean Room Tech Co ltd
Current assignee: Shanghai Chuntian Laboratory Equipment Co ltd; Kaichun Clean Room Tech Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2023-12-22

Abstract

The application relates to a constant-pressure variable air volume control method and a related device for a barrier-level experimental animal house, wherein the method comprises the following steps: acquiring the current time and the indoor ammonia concentration, and performing mode selection based on the current time and the indoor ammonia concentration; wherein the alternative modes include a daytime mode and a nighttime mode; adjusting and setting theoretical pressure differences of all the functional areas based on the night mode and adjusting ventilation rates of all the functional areas, wherein the theoretical pressure differences of all the functional areas are set according to preset pressure control gradients; calculating the theoretical air supply rate and the theoretical air exhaust rate of each functional area based on the theoretical pressure difference and the service condition of the functional area; and adjusting the travel time of each air supply air valve based on each theoretical air supply rate and theoretical air exhaust rate. The system can adjust the working power of the system according to day and night changes and the activity degree of animals, can greatly save energy sources when guaranteeing ventilation quality, and has the advantage of green and environment protection.

Description

Constant-pressure variable air volume control method and related device for barrier-level experimental animal house

Technical Field

The application relates to the field of clean rooms, in particular to a constant-pressure variable air volume control method and a related device for a barrier-level laboratory animal house.

Background

With the development of scientific research, experimental animals play an increasingly important role in various biomedical research. Among these, SPF (Specific Pathogen Free) barrier-class laboratory animal houses are a key element in providing a pathogen-specific, sterile environment that allows researchers to perform laboratory animal farming and research in a safe, controlled environment.

The environmental control of SPF barrier-class laboratory animal houses is very stringent, with the design and operation of air conditioning ventilation systems being particularly important. The air conditioning system needs to ensure stable parameters such as temperature, humidity, air quality and the like in the room, and needs to exchange air regularly so as to ensure the cleanliness and the safety of the experimental environment.

However, at night, the use of laboratory animal houses is significantly different from daytime. Because the flow of staff is reduced at night, the liveness of animals is reduced, and the generated metabolites are reduced, the air quality in the laboratory animal house is relatively good, and the ventilation requirement is reduced. However, current air conditioning ventilation systems generally still operate at daytime frequencies, which results in wasted energy. Therefore, searching for an operation mode of an air conditioning ventilation system capable of meeting the environmental requirements of an experimental animal house and simultaneously effectively saving energy sources becomes an important research subject at present.

Disclosure of Invention

In order to save energy sources while guaranteeing ventilation quality, the application provides a constant-pressure variable air volume control method and a related device for a barrier-level experimental animal house.

In a first aspect, the application provides a constant pressure variable air volume control method for a barrier-level laboratory animal house, which adopts the following technical scheme:

a constant-pressure variable air volume control method for a barrier-level experimental animal house comprises the following steps:

s1, acquiring current time and indoor ammonia concentration, and performing mode selection based on the current time and the indoor ammonia concentration; wherein the alternative modes include a daytime mode and a nighttime mode;

s2, adjusting and setting theoretical pressure differences of all the functional areas based on a night mode and adjusting ventilation rates of all the functional areas, wherein the theoretical pressure differences of all the functional areas are set according to preset pressure control gradients, and the functional areas comprise a cleaning corridor, a feeding room and a dirt corridor;

s3, calculating the theoretical air supply rate and the theoretical air exhaust rate of each functional area based on the theoretical pressure difference and the service conditions of the functional areas;

s4, adjusting the travel of each air supply air valve on a time axis based on each theoretical air supply rate and theoretical air exhaust rate.

By adopting the technical scheme, the activity degree of animals in the feeding room can be well distinguished through the time period and the indoor ammonia concentration, so that two working gears of a daytime mode and a night mode are formed. The method can effectively reduce the energy consumption of the air conditioning system and improve the energy efficiency by reducing the ventilation times in the night mode. By setting theoretical pressure difference and adjusting the travel time of the air supply air valve, the pressure difference of each room can be ensured to be stable, and the air quality can be ensured. This is extremely important for laboratory animal houses, since the stability of the environment directly influences the effectiveness and reliability of the experiment. The method selects the mode based on the current time, and automatically calculates and adjusts the air quantity according to the theoretical pressure difference and the room service condition, thereby realizing the automation of the control process. Not only lightens the workload of operators, but also avoids errors possibly occurring in manual operation and improves the accuracy and reliability of control. In addition, the method can be adjusted according to the actual use condition of the room, and has good adaptability. The method can effectively consider and process the changes of the using frequency, the using time and other factors of the room, and ensures the stability and the reliability of the control effect.

Optionally, the step S1 includes the following substeps:

s11, acquiring current time by using a built-in clock or a network clock;

s12, comparing the current time with a preset time based on a preset time period, wherein the preset time period comprises a daytime time period and a night time period;

s13, if the current time is in a daytime period, selecting a daytime mode; if the current time is in the night time period, judging whether the indoor ammonia concentration exceeds a preset value, if so, selecting a daytime mode, and if not, selecting a night mode.

By adopting the technical scheme, the automatic adjustment of the ventilation mode can be realized by acquiring the current time in real time and selecting the mode based on the current time, so that the manual intervention is reduced, and the operation efficiency is improved. In the night mode, the activity of the animals is reduced due to less activities of personnel flowing and dust emission, the generated metabolites are reduced, and the ventilation times and the air supply and exhaust quantity can be properly reduced, so that the energy is saved. The system can automatically switch modes according to the current time, can be better adapted to different running conditions, and improves the flexibility and adaptability of the system. Through reasonable mode selection, proper pressure difference can be ensured to be maintained under various conditions, and safety problems caused by overlarge or undersize pressure difference are avoided.

Optionally, the step S2 includes the following substeps:

s21, when the current mode is identified as a night mode, starting a preset pressure control gradient setting program;

s22, calculating the theoretical pressure difference of each functional area according to the arrangement echelon of the functional areas and the preset pressure gradient;

s23, setting the calculated theoretical differential pressure as a target differential pressure of each functional area, wherein the target differential pressure is used for calculating the theoretical air supply rate and the theoretical air exhaust rate;

s24, monitoring the actual pressure difference of each functional area, comparing the actual pressure difference with the theoretical pressure difference, and if deviation exists, adjusting the air supply rate and the air exhaust rate to enable the actual pressure difference to be close to the theoretical pressure difference.

By adopting the technical scheme, the pressure difference of each functional area can be accurately controlled through the comparison of the preset pressure control gradient and the actual pressure difference, so that the safety of the barrier-level experimental animal house is improved. In this step, the system is allowed to flexibly adjust the pressure gradient setting according to the current mode (day or night) so as to meet the requirements in different modes, and the flexibility and the practicability of the system are improved. Under the night mode, on the premise of maintaining the pressure gradient, the whole of the air supply rate and the air exhaust rate is reduced, and the air supply fan is maintained to work in a lower power state, so that energy is saved. In addition, the implementation of the step S2 is automatically carried out, so that the need of manual intervention is reduced, and the efficiency is improved.

Optionally, the step S3 includes the following substeps:

s31, calculating a theoretical air supply rate according to a set theoretical pressure difference, wherein the theoretical air supply rate is calculated by the volume of a feeding room, the ventilation frequency and the safety coefficient, the safety coefficient is used for considering uncertainty and possible errors of a system, and the ventilation frequency is set based on national standard requirements and the service condition of the feeding room;

s32, calculating additional air supply rate based on the service condition of the feeding room;

s33, adding the theoretical air supply rate and the additional air supply rate to obtain a total air supply rate;

s34, calculating theoretical exhaust rate and additional exhaust rate based on the set theoretical pressure difference and the service condition of the feeding room, and adding to obtain the total exhaust rate.

By adopting the technical scheme, the pressure difference and the air quality between the raising rooms can be ensured to be effectively controlled under all conditions. When the theoretical air supply rate and the air exhaust rate are calculated, the method considers the service condition of the feeding room and the uncertainty of the system, so that the control process is more accurate and reliable. In addition, the method can dynamically adjust the air supply rate and the air exhaust rate according to actual needs, and improves the adaptability and the flexibility of the system. In the environment such as an experimental animal house, the method can effectively maintain stable pressure difference and high-quality air, and improve the effectiveness and reliability of the experiment.

Optionally, the step S4 includes the following steps:

taking the adjustment process between the daytime mode and the night mode of each air supply valve as a switching task, wherein the switching time sequence comprises a starting time point and a stabilizing time point, and the difference between the air supply rates corresponding to the stabilizing time point and the starting time point is the difference between the theoretical air supply rate of the daytime mode and the theoretical air supply rate of the night mode of the air supply valves;

setting a starting time point and a stabilizing time point of a switching task based on the mode conversion time point and the obtained working time sequence of the working task; in the switching process from the daytime mode to the night mode, the air supply level from the starting time point to the stable time point is gradually reduced until zero; in the switching process from the night mode to the daytime mode, the air supply level from the starting time point to the stable time point is gradually increased from zero until the air supply level is stable; wherein, the air supply level is positively correlated with the air supply rate;

and superposing the working tasks of the same air supply valve in the same time period, and adjusting the superposition result to ensure that the air supply level of the superposition result in the adjacent time period is continuously increased or decreased or unchanged, and the total air supply level of the air supply valve is lower than the preset maximum level.

Optionally, the step S4 further includes the following substeps:

The method comprises the steps of taking a process from starting to stopping of one-time air supply speed adjustment of an air supply air valve of each feeding room as one-time work task, presetting work time sequences of all work tasks based on a night mode, wherein the preset work time sequences comprise a starting time point, a peak time point and a stopping time point;

and analyzing the relation between the total air supply rate and the preset maximum air supply rate of all the feeding rooms on different time nodes, and adjusting the peak time point and the termination time point if the total air supply rate is greater than the preset maximum air supply rate.

By adopting the technical scheme, the frequent switching of the working state of the air supply fan between high power and low power can be effectively avoided. According to the scheme, through presetting the working time sequence and adjusting the peak time point and the termination time point according to actual conditions, the method can effectively avoid that the total air supply rate exceeds the preset maximum air supply rate, and keep the air supply rate relatively stable, so that the fan can be kept to operate in a relatively low-power state. When it is predicted that the air supply rate may exceed the maximum value, the method maintains the pressure stability in the feeding room by extending the operation task time (i.e., the travel time) of the air supply air valve, instead of increasing the air supply rate of the air supply air valve. In this way, a constant air flow and pressure balance can be maintained even in the case where the total air supply rate approaches the maximum air supply rate. The design can further improve the energy efficiency of the air conditioning system and reduce the running cost by finely adjusting the travel time of the air supply air valve instead of the air supply rate.

Optionally, the process from start to stop of the primary air supply rate adjustment of the air supply air valves of the raising rooms is a primary work task, and the step of presetting the work time sequence of each work task based on the night mode comprises the following steps:

s411, dividing the time axis into time periods, and enabling the work task to correspond to each time period of the time axis according to the work time sequence;

s412, carrying out air supply grade division on the theoretical air supply rate corresponding to the local work tasks in each time period on the time axis, wherein the air supply grade in the adjacent time period is continuously increased or decreased or unchanged, and the air supply grade of one work task is increased and then decreased on the time axis.

Through adopting above-mentioned technical scheme, through carrying out the time interval with the time axis and divide to each time interval that corresponds the time axis with the work task according to the work time sequence, this makes can carry out more accurate and individualized air volume control according to the service condition and the environmental requirement of different time intervals between different rearing, has improved air volume control's efficiency and accuracy nature. And (3) carrying out air supply grade division on the theoretical air supply rate corresponding to the local work task of each time period on the time axis, so that the system can more clearly understand and control the air supply requirement of each time period. The air supply rate is positively correlated with the air supply level, and the air supply level in adjacent time intervals is continuously increased or decreased or unchanged, so that the system can stably adjust the air supply rate, and sudden air volume change is avoided, thereby ensuring the stability of the pressure in a feeding room, reducing pressure difference fluctuation and reducing the possibility of spreading pollutants in an experimental animal house.

Optionally, the step of analyzing the relation between the total air supply rate and the preset maximum air supply rate among all the feeding rooms on different time nodes, and if the total air supply rate is greater than the preset maximum air supply rate, adjusting the peak time point and the termination time point includes the following steps:

s421, monitoring the opening and closing conditions of doors and windows of all the rearing rooms, and increasing the working tasks of the air supply valves of the corresponding rearing rooms based on the detected opening and closing actions;

s422, overlapping the working tasks of the same air supply valve in the same time period, and adjusting the overlapping result to enable the air supply level of the overlapping result in the adjacent time period to be continuously increased or decreased or unchanged;

s423, calculating total air supply rates of all the raising rooms in different time periods, if the total air supply rates of all the raising rooms in a certain time period are larger than a preset maximum air supply rate, according to the opening and closing sequence of doors and windows of the raising rooms, delaying peak time points and working termination time points of corresponding air supply air valves one by one, and reducing air supply grades corresponding to the peak time points until the total air supply rate is smaller than or equal to the preset maximum air supply rate;

s424, based on the air supply grades of the air supply air valves of all the feeding rooms, adjusting the air exhaust rate of the air outlet air valves of all the feeding rooms, wherein the air exhaust rate is positively correlated to the air exhaust grade, and the air supply grades in adjacent time periods are continuously increased or decreased or unchanged.

By adopting the technical scheme, the working tasks of the air supply valves of the corresponding rearing rooms are increased based on the detected opening and closing actions by monitoring the opening and closing conditions of doors and windows of the rearing rooms, the real-time environment change of the experimental animal rearing rooms can be responded quickly, and the pressure difference in the rearing rooms is ensured to be stable. The working tasks of the same air supply valve in the same time period are overlapped, and the overlapped result is adjusted so that the air supply level of the overlapped result in the adjacent time period is continuously increased or decreased or unchanged, smooth transition of air quantity control is realized, and pressure difference fluctuation caused by air quantity mutation is avoided. By calculating the total air supply rate of each period, if the total air supply rate is larger than the preset maximum air supply rate, according to the sequence of the pressure gradient, from the feeding room with the minimum pressure difference to the feeding room with the maximum pressure difference, the peak time point and the working termination time point of the corresponding air supply air valve are delayed after the feeding room by feeding room, the air supply grade corresponding to the peak time point is reduced, the dynamic optimization of air quantity control is realized, and the fan is continuously kept to operate in a relatively low power state. By adjusting the air exhaust level of the air outlet valve of each feeding room based on the air supply level of the air supply valve of each feeding room, the coordination control between air supply and air exhaust is realized, so that the pressure difference stability of the feeding room is ensured, the air quality in the feeding room is ensured, and the safety and reliability of an experiment are improved.

In a second aspect, the application provides a constant pressure variable air volume control system for a barrier-level laboratory animal house, which adopts the following technical scheme:

a constant-pressure variable air volume control system for a barrier-level laboratory animal house comprises:

the mode selection module is used for acquiring the current time and the indoor ammonia concentration and performing mode selection based on the current time; wherein the alternative modes include a daytime mode and a nighttime mode;

the parameter adjusting module is used for adjusting and setting the theoretical pressure difference of each functional area and adjusting the ventilation times of each functional area based on a night mode, wherein the theoretical pressure difference of each functional area is set according to a preset pressure control gradient, and the functional areas comprise a cleaning corridor, a feeding room and a dirt corridor;

the calculation module is used for calculating the theoretical air supply rate and the theoretical air exhaust rate of each functional area based on the theoretical pressure difference and the service condition of the functional area;

and the adjusting module is used for adjusting the travel time of each air supply air valve based on each theoretical air supply rate and theoretical air exhaust rate.

By adopting the technical scheme, the method can effectively reduce the energy consumption of the air conditioning system and improve the energy efficiency by distinguishing the daytime mode from the nighttime mode and reducing the ventilation times in the nighttime mode. By setting theoretical pressure difference and adjusting the travel time of the air supply valve, the method can ensure the pressure difference of each room to be stable and ensure the air quality. This is extremely important for laboratory animal houses, since the stability of the environment directly influences the effectiveness and reliability of the experiment. The method selects the mode based on the current time, and automatically calculates and adjusts the air quantity according to the theoretical pressure difference and the room service condition, thereby realizing the automation of the control process. The method not only reduces the workload of operators, but also avoids errors possibly occurring in manual operation, and improves the accuracy and reliability of control. In addition, the method can be adjusted according to the actual use condition of the room, and has good adaptability. The method can effectively consider and process the changes of the using frequency, the using time and other factors of the room, and ensures the stability and the reliability of the control effect.

In a third aspect, the present application provides a computer device, which adopts the following technical scheme:

a computer apparatus, comprising:

one or more processors;

a memory;

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to: the constant-pressure variable-air-volume control method for the barrier-level experimental animal house is implemented.

In a fourth aspect, the present application provides a computer readable storage medium, which adopts the following technical scheme:

a computer readable storage medium storing a computer program capable of being loaded by a processor and executing the method as described above.

The storage medium stores at least one instruction, at least one program, a set of codes, or a set of instructions that are loaded and executed by the processor to implement: the constant-pressure variable-air-volume control method for the barrier-level experimental animal house.

Drawings

Fig. 1 is a flow chart of a method for controlling constant pressure variable air volume of a barrier-level laboratory animal room according to an embodiment of the invention.

FIG. 2 is a block diagram showing the steps S1 in an embodiment of the invention.

Fig. 3 is a schematic diagram of a barrier-class laboratory animal house according to an embodiment of the invention.

FIG. 4 is a block diagram showing the S2 sub-step in an embodiment of the present invention.

FIG. 5 is a block diagram showing the flow of the step S3 according to an embodiment of the invention.

FIG. 6 is a block diagram of the S4 sub-step in an embodiment of the invention.

FIG. 7 is a block diagram showing the steps S41 in an embodiment of the invention.

FIG. 8 is a block diagram showing the sub-step S42 in an embodiment of the invention.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. As part of this specification, some of the drawings of the present disclosure represent structures and devices in block diagram form in order to avoid obscuring the principles of the disclosure. In the interest of clarity, not all features of an actual implementation are necessarily described. Furthermore, the language used in the present disclosure has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter, resort to the requisite claims to determine such inventive subject matter. Reference in the present disclosure to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and multiple references to "one embodiment" or "an embodiment" should not be understood as necessarily all referring to the same embodiment.

The terms "a," "an," and "the" are not intended to refer to a singular entity, but rather include the general class of which a particular example may be used for illustration, unless clearly defined. Thus, the use of the terms "a" or "an" may mean any number of at least one, including "one", "one or more", "at least one", and "one or more than one". The term "or" means any of the alternatives and any combination of alternatives, including all alternatives, unless alternatives are explicitly indicated as mutually exclusive. The phrase "at least one of" when combined with a list of items refers to a single item in the list or any combination of items in the list. The phrase does not require all of the listed items unless specifically so defined.

The embodiment of the application discloses a constant-pressure variable air volume control method for a barrier-level experimental animal house. The constant-pressure variable air volume control method for the barrier-level experimental animal room is applied to a constant-pressure variable air volume control system for the barrier-level experimental animal room, and comprises a client and a server, wherein the client communicates with the server through a network. The client is also called a client, and refers to a program corresponding to a server and providing local services for the client. Further, the client is a computer-side program, an APP program of the intelligent device or a third party applet embedded with other APP. The client may be installed on, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, portable wearable devices, and other computer devices. The server may be implemented as a stand-alone server or as a server cluster composed of a plurality of servers.

Laboratory animal houses generally require strict environmental controls including temperature, humidity, light, noise, and air quality. The air quality is controlled mainly by the ventilation function of the air conditioning system. During daytime, laboratory animal houses need to maintain high frequency ventilation to ensure air quality due to frequent personnel activities. However, at night, personnel activities are reduced, the pollutant production rate in the feeding room is reduced, and high-frequency ventilation is not required.

Under the traditional air conditioning control mode, the air conditioning system sets the ventilation times according to the highest requirement (namely, daytime requirement), which results in that the ventilation times of the air conditioning system are still high at night, and the energy waste is caused. In addition, because the service conditions of the functional areas are different, the fixed ventilation times can not meet the requirements of all the functional areas, the air quality of some functional areas can be lower than the standard, or the integral reduction of the air quantity can generally cause the change and disorder of the pressure difference between the functional areas, so that the operation for reducing the air quantity at night is rarely performed in the current engineering. It should be noted that the "ventilation times" in the embodiments of the present application are standard terms of the clean room industry, which are equivalent to ventilation frequency, i.e. the ventilation times per unit time, and may be used in units of times per hour.

In order to solve the problem, we propose a constant pressure variable air volume control method for a barrier-level laboratory animal house. The method selects modes according to the current time, including a daytime mode and a nighttime mode, and adjusts the theoretical pressure difference of each functional area and the travel time of the air supply air valve according to the selected modes.

For example, in diurnal mode, ventilation at high air delivery rates can be set due to frequent personnel activities, and a large theoretical pressure differential can be set to ensure air quality. However, in night mode, personnel activities are reduced, animal liveness is reduced, the produced metabolites are reduced, ventilation rate can be reduced, and smaller theoretical pressure differences are set to save energy.

By the method, the ventilation strategy can be dynamically adjusted according to the actual use condition of the laboratory animal house, the air quality is improved, the environmental requirement is met, the energy is saved, and the running efficiency of the air conditioning system is improved.

Specifically, referring to fig. 1, the method for controlling the constant pressure variable air volume of the barrier-level laboratory animal house comprises S1-S4.

S1, acquiring current time and indoor ammonia concentration, and performing mode selection based on the current time and the indoor ammonia concentration; among the alternative modes are daytime and nighttime modes.

The activity level of animals in the feeding room can be well distinguished through the time period and the indoor ammonia concentration, so that two working gears of a daytime mode and a night mode are formed. The method can effectively reduce the energy consumption of the air conditioning system and improve the energy efficiency by reducing the ventilation times in the night mode.

Specifically, referring to FIG. 2, S1 may include substeps S11-S13.

S11, acquiring the current time by using a built-in clock or a network clock.

The current time may be acquired here using a built-in hardware clock or by acquiring a network clock through a network connection. For example, if the system is running on an embedded device, then we can read the hardware clock through an API provided by the embedded operating system to obtain the current system time. If the system is running on an internet-connected device, the time of the network time server may be obtained as the current time through a network protocol (such as NTP).

S12, comparing the current time with a preset time based on a preset time period, wherein the preset time period comprises a daytime time period and a night time period.

For example, the system may preset a daytime period and a nighttime period of a day. For example, a daytime period may be set from 6 am to 8 pm and a nighttime period from 8 pm to 6 am the next day. When the current time is obtained, it may be compared with a preset time period.

The indoor ammonia concentration is used to characterize the liveness of animals in a feeding room, the higher the liveness of the animals, the higher the indoor ammonia concentration will generally be. For example, the current time is 7 a.m. for 30 minutes, which is within a preset daytime period, thus selecting the daytime mode. If the current time is 9 pm for 30 min, this time point is within the night time period preset by us, at this time, it needs to be judged whether the indoor ammonia concentration exceeds the preset value, if it is lower than the preset threshold, the night mode is selected. In this way, different modes of operation can be dynamically selected depending on the current time.

The automatic adjustment of the ventilation mode can be realized by acquiring the current time in real time and selecting the mode based on the current time, so that the manual intervention is reduced, and the operation efficiency is improved. In the night mode, the activity of personnel flowing and dust emission is less, the activity of animals is lower, and the air supply and exhaust rate can be properly reduced, so that the energy is saved. The system can automatically switch modes, can be better adapted to different running conditions, and improves the flexibility and adaptability of the system. Through reasonable mode selection, proper pressure difference can be ensured to be maintained under various conditions, and safety problems caused by overlarge or undersize pressure difference are avoided.

S2, adjusting and setting theoretical pressure differences of all the functional areas based on a night mode and increasing the ventilation rate of the animal house, wherein the theoretical pressure differences of all the functional areas are set according to a preset pressure control gradient.

The pressure gradient refers to the rate of change of pressure in space, and in this application, the pressure gradient refers to the pressure difference between the respective functional areas, i.e., the pressure change from one functional area to another. This is a control strategy to ensure that the pressure in each functional area is maintained at a suitable level to control the air flow direction, to ensure environmental quality, and to save energy.

For example, referring to FIG. 3, assume three functional areas, referred to as a clean corridor, a rearing room, and a dirt corridor, respectively, are arranged as shown, wherein VAV in the figure is a variable air volume valve, FL is an air volume sensor, HPA is a differential pressure transducer, and AC is an ammonia concentration sensor. In order to prevent the pollutants in the air from flowing into the clean corridor from the feeding room and the dirt corridor, the pressure of the air supply opening of the clean corridor is required to be higher than that of the air supply opening of the clean corridor and the feeding room. To achieve this, the pressure in each room can be adjusted by controlling the opening of the supply and exhaust dampers so that the pressure forms a decreasing gradient from the clean corridor to the feeding room and then to the dirt corridor. This is the so-called "pressure gradient room-by-room air delivery". It should be noted that the pressing force gradient may be configured to supply air to each functional area simultaneously or may be configured to supply air to each functional area separately at different timings.

The method selects the mode based on the current time, and automatically calculates and adjusts the air quantity according to the theoretical pressure difference and the service condition of the functional area, thereby realizing the automation of the control process.

Specifically, referring to FIG. 4, S2 may include substeps S21-S24.

s24, monitoring the actual pressure difference of each room, comparing the actual pressure difference with the theoretical pressure difference, and if the deviation exists, adjusting the air supply rate and the air exhaust rate to enable the actual pressure difference to be close to the theoretical pressure difference.

The pressure difference of each room can be accurately controlled by comparing the preset pressure control gradient with the actual pressure difference, so that the safety of the barrier-level experimental animal room is improved. In this step the system is allowed to flexibly adjust the pressure gradient settings according to the current mode (day or night) to meet the demands in different modes. This increases the flexibility and practicality of the system. In the night mode, the whole of the air supply rate and the air exhaust rate is reduced by adjusting the pressure gradient setting, so that energy is saved. In addition, the implementation of the step S2 is automatically carried out, so that the need of manual intervention is reduced, and the efficiency is improved.

In addition, when switching between the daytime mode and the nighttime mode, the pressure difference in the different functional areas needs to be adjusted according to the pressure gradient. Wherein, the rule of the differential pressure value is that the clean corridor is more than the feeding room is more than the dirt corridor.

Switching a night mode: firstly, reducing the air supply quantity of a sewage corridor; then, according to a preset algorithm, reducing the air quantity of each feeding room in sequence; finally reducing the air supply quantity of the clean corridor. During this time, the amount of exhaust air is adjusted in real time according to the feedback of the differential pressure transmitter to maintain the differential pressure of each room. The whole system pressure gradient is unchanged in the whole process.

Switching the daytime mode: firstly, improving the air supply quantity of a cleaning corridor; then, according to a preset algorithm, the air quantity of each feeding room is sequentially increased; and finally, improving the air supply quantity of the clean corridor. During this time, the amount of exhaust air is adjusted in real time according to the feedback of the differential pressure transmitter to maintain the differential pressure of each room. The whole system pressure gradient is unchanged in the whole process.

The preset algorithm is determined based on the distribution position of the feeding room in the pipeline system, the total ventilation amount generated by the feeding room based on the pressure difference required to change the self volume, the pressure difference value of the functional area and other parameters. For example, the distance between the different rearing rooms and the blower can influence the air supply amount, the air supply rate and the air supply timing of the rearing rooms at the relative positions on the pipeline branches. For the differential pressure value, starting from the functional area with the lowest differential pressure when the air quantity is reduced, gradually adjusting the differential pressure to the functional area with the highest differential pressure, and ensuring the maintenance of the pressure gradient; the opposite is true when the air quantity is increased. Due to the influence of the factors, irregular and severe fluctuation is easily generated in the air supply process due to different requirements of different feeding rooms, different requirements of different functional areas, irregular movements of personnel and animals in the feeding rooms and switching of an air supply mode, so that the fan is easily switched between high-power operation and low-power operation, and the energy conservation and the environmental protection are not facilitated. Meanwhile, too frequent pressure difference changes can easily cause accidental diffusion of pollution. Therefore, the introduction of the air supply level in steps S3 and S4 solves this. S3, calculating the theoretical air supply rate and the theoretical air exhaust rate of each functional area based on the theoretical pressure difference and the service condition of the functional area.

Specifically, referring to FIG. 5, S3 may include substeps S31-S34.

S31, calculating a theoretical air supply rate according to a set theoretical pressure difference, wherein the theoretical air supply rate is calculated by the volume of a feeding room, the ventilation frequency and a safety coefficient, the safety coefficient is used for considering uncertainty and possible errors of a system, and the ventilation frequency is set based on the theoretical pressure difference;

By such a step, it is ensured that the pressure difference and the air quality between the feeding compartments are effectively controlled under all conditions. When the theoretical air supply rate and the air exhaust rate are calculated, the method considers the service condition of the feeding room and the uncertainty of the system, so that the control process is more accurate and reliable. In addition, the method can dynamically adjust the air supply rate and the air exhaust rate according to actual needs, and improves the adaptability and the flexibility of the system. In the environment such as an experimental animal house, the method can effectively maintain stable pressure difference and high-quality air, and improve the effectiveness and reliability of the experiment.

The travel of the air supply air valve on the time axis comprises the position of the working period on the time axis and also comprises the opening degree of the air supply air valve at different time points on the working period. In this step, by setting a theoretical differential pressure and adjusting the stroke of the supply air valve on the time axis, this method can ensure the stability of the differential pressure of each room and ensure the air quality.

Specifically, referring to FIG. 6, S4 may include substeps S41-S42.

S41, presetting working time sequences of all working tasks based on a night mode by taking a process from one-time starting to one-time ending of an air supply air valve as one working task, wherein the preset working time sequences comprise a starting time point, a peak time point and a ending time point.

The method can effectively avoid frequent switching of the working state of the air supply fan between high power and low power, and effectively avoid the total air supply rate exceeding the preset maximum air supply rate by presetting the working time sequence and adjusting the peak time point and the termination time point according to actual conditions, and keep the air supply rate relatively stable, so that the fan can be kept to operate in a state with relatively low power. When it is predicted that the air supply rate may exceed the maximum value, the method maintains the pressure stability in the feeding room by extending the operation task time (i.e., the travel time) of the air supply air valve, instead of increasing the air supply rate of the air supply air valve. In this way, a constant air flow and pressure balance can be maintained even in the case where the total air supply rate approaches the maximum air supply rate.

The design effectively prevents the condition of overlarge pressure difference among rooms caused by overlarge air supply rate, reduces the possibility of spreading pollutants in the rooms, and improves the safety of the barrier-level experimental animal house. Meanwhile, the energy efficiency of the air conditioning system can be further improved and the running cost is reduced by finely adjusting the travel time of the air supply air valve rather than the air supply rate.

In particular, referring to FIG. 7, S41 may include sub-steps S411-S412.

S411, dividing the time axis into time periods, and enabling the work tasks to correspond to each time period of the time axis according to the work time sequence.

Take night mode as an example. The period of the night mode may be preset to 22:00 to 6:00 the next day. During this period, the duty of the blast damper may be further divided into a plurality of periods. For example, one period per minute, the night mode is divided into 480 periods. Note that the more the period division, the finer the air supply control, and the heavier the calculation load on the system.

S412, carrying out air supply grade division on the theoretical air supply rate corresponding to the local work task in each time period on the time axis, wherein the air supply grade is positively correlated with the air supply rate, the air supply grade in the adjacent time period is continuously increased or decreased or unchanged, and the air supply grade of one work task is increased and then decreased on the time axis.

For example, the theoretical air supply rate of the duty of the air supply damper may be further divided into a plurality of air supply levels at each time period. Taking a specific feeding room as an example, an air inlet valve of the feeding room is opened at 22:00, the period of 22:00-22:01 corresponds to a starting time point, the theoretical air supply rate can be set to be 5 m mu/h, and the corresponding air supply grade is 1 grade; the theoretical air supply rate in the period of 22:01-22:02 can be set to be 10 m waves/h, and the corresponding air supply grade is 2; and so on, by 22:10-22:11, the air supply level reaches the maximum corresponding to the peak time point, and then the theoretical air supply rate gradually decreases, and the air supply level correspondingly decreases. Thus, the air supply grade division of the theoretical air supply rate is completed. In this example, the air supply level tends to increase and decrease on the time axis. It should be noted that, in different embodiments, a recent level may be a fixed value or an average value, and the level of the overall air supply rate may be adjusted to be smoothly rising or smoothly falling according to the period of time. For example, the current period is 2 stages, the current period is 3 stages, and the later period is 4 stages, the air supply rate in the current period is smoothly increased.

In conclusion, by dividing the time axis into time periods and corresponding the work tasks to each time period of the time axis according to the work time sequence, more accurate and personalized air volume control can be performed according to the use condition and the environment requirements of the experimental animal feeding room in different time periods, and the efficiency and the accuracy of the air volume control are improved. And (3) carrying out air supply grade division on the theoretical air supply rate corresponding to the local work task of each time period on the time axis, so that the system can more clearly understand and control the air supply requirement of each time period. The air supply rate is positively correlated with the air supply level, and the air supply levels in adjacent time intervals are continuously increased or decreased or unchanged, so that the system can stably adjust the air supply rate, and sudden air volume changes are avoided, thereby ensuring the stability of the pressure in the feeding room, reducing pressure difference fluctuation and reducing the possibility of pollutant transmission in the experimental animal feeding room.

It should be noted that, in the present application, the air intake rate of the air supply valve for maintaining the night stable condition of the feeding room is the theoretical air supply rate, the newly added air intake rate corresponding to the work person is the additional air supply rate, and the sum of the theoretical air intake rate and the additional air intake rate is referred to as the total air supply rate.

S42, analyzing the relation between the total air supply rate of each time node and the preset maximum air supply rate, and adjusting the peak time point and the termination time point if the total air supply rate is greater than the preset maximum air supply rate.

In particular, referring to FIG. 8, S42 may include sub-steps S421-S424.

S421, monitoring the opening and closing conditions of doors and windows of all the rearing rooms, and increasing the working tasks of the air supply valves of the corresponding rearing rooms based on the detected opening and closing actions.

For example, if the door and window of bay a is open at 22:30, the control system will detect this and then add a new job to the supply air valve of bay a, starting at 22:30, with the peak time supply level set to level 1. The theoretical air supply level of the feeding room a was 5.

S422, overlapping the working tasks of the same air supply valve in the same time period, and adjusting the overlapping result to enable the air supply level of the overlapping result in the adjacent time period to be continuously increased or decreased or unchanged, wherein the air supply level is increased and decreased firstly on a time axis.

For example, during the period of 22:30-23:00, the supply air valves of both bay A and bay B maintain a theoretical supply air rate corresponding to a theoretical supply air level of 5. If the feeding rooms A and B are newly provided with a plurality of work tasks in the period, the control system can superpose the theoretical air supply grades of the two feeding rooms at different time points and the additional air supply grades of the work tasks to obtain the total air supply grade. If the total air supply level is greater than the preset maximum air supply rate of the air supply fan at a certain time point after superposition, the control system can adjust the working tasks of the air supply air valves of the two feeding rooms so as to ensure that the air supply level of the superposition result is continuously increased or decreased or unchanged at adjacent time intervals.

In a further example, assume that in feeding room A, an experimental operation requiring a large amount of ventilation is expected at 22:00. To meet the ventilation requirement of this operation, the feeding room A will be newly added with a work task, the work task of the air supply valve is arranged in the period of 22:00-22:20, and the peak time point is that the air supply level of 22:10 is gradually increased from 0 level to 5 level and then decreased to 0 level.

However, at 22:08, the monitoring system detects that the door and window of bay A is suddenly opened, possibly for laboratory personnel to enter or exit the bay or for other reasons. According to the monitored windowing action, the control system decides to increase the corresponding air supply valve work task once so as to maintain the air quality in the feeding room, wherein the starting time point is 20:08, the peak time point is 20:10, and the ending time point is 20:12.

By the mode, the control system can flexibly adjust the working tasks of the air supply valve according to actual conditions, so that the ventilation requirement in a feeding room can be met, and the running stability of the system can be ensured.

S423, calculating total air supply rates of all the feeding rooms in different time periods, if the total air supply rates of all the feeding rooms in a certain time period are larger than a preset maximum air supply rate, according to the opening and closing sequence of doors and windows of the feeding rooms, delaying peak time points and working termination time points of the corresponding air supply air valves one by one, and reducing air supply grades corresponding to the peak time points until the total air supply rate is smaller than or equal to the preset maximum air supply rate.

For a single room, assume that the feeding room a maintains a theoretical air supply level of 3, and that the maximum air supply level supportable by the air supply blower in the low power mode is 10. Thus, the feeding room A has two working tasks in the period of 22:00-22:10, one working task is the originally planned working task, and the air supply level is gradually increased from level 0 to level 5; the other is that the air supply level is reduced to 0 level from 0 level to 3 level and back to 0 level because of the newly added work task of the windowing action.

At this point, the control system needs to superimpose the two work tasks. If superimposed directly, the supply air level reaches a maximum of 11 levels at 20:10. The air supply level exceeds the maximum carrying capacity of the night air supply fan in the low power mode. Therefore, the control system needs to adjust the superposition result to ensure that the air supply level is within a reasonable range.

Specifically, the control system may choose to slightly decrease the air delivery level of the originally planned work task and the newly added work task at the peak time point so that the total air delivery level is within a reasonable range.

The theoretical air supply levels of the rooms are not the same for the rooms, and the door and window opening and closing sequence of the feeding room actually represents the abnormal change sequence of the pressure difference of the feeding room. For example, the control system calculates the total air supply rate for this period of 22:30-23:00. If the total air supply rate is greater than the preset maximum air supply rate, the control system can extend the peak time point and the working end time point of the corresponding air supply air valve from the feeding room (for example, feeding room A) with the first opening window to the feeding room (for example, feeding room B) with the last opening window according to the sequence of opening and closing the doors and windows of the feeding room, and reduce the air supply level corresponding to the peak time point until the total air supply rate at each time point is less than or equal to the preset maximum air supply rate.

Alternatively, the peak time point and the operation end time point of the corresponding blast damper may be delayed from low to high in the order of the differential pressure. In a further example, suppose that during the period 22:30-23:00, there are three feeder cells, feeder cell A, feeder cell B and feeder cell C, respectively, that need to be operated. The total air supply rate of each feeding room is 10 m, 15 m and 20 m, respectively, so that the total air supply rate of the three feeding rooms is 45 m. Assuming that the preset maximum air supply rate is 40 m n/h, then the total air supply rate exceeds the preset maximum air supply rate at this time.

To solve this problem, the control system adjusts from the feeding chamber with the smallest pressure difference to the feeding chamber with the largest pressure difference in the order of the pressure gradients. It is assumed that in this case, the pressure difference between feeding room a is minimum, the pressure difference between feeding room B is centered, and the pressure difference between feeding room C is maximum. The control system will first adjust the working tasks of the supply air valve of the feeding room a.

Specifically, the control system delays the peak time point and the working end time point of the air supply valve of the feeding room A, and reduces the air supply level corresponding to the peak time point. For example, the peak time point of the original feeding house A is 22:45, and the peak time point may be delayed to 22:47, and the air supply level of the peak time point is reduced from the highest level to a lower level.

The control system then recalculates the total air supply rate. If the total air supply rate is still greater than the preset maximum air supply rate, the control system will make the same adjustments to the booth B, then the booth C. This process continues until the total air supply rate is less than or equal to the preset maximum air supply rate.

In this way, the control system can ensure that the air supply rate of the overall system is within an acceptable range while maintaining as stable a pressure differential across each feeding chamber as possible to ensure air quality and energy conservation.

S424, adjusting the air exhaust grade of the air outlet valve of each feeding room based on the air supply grade of the air supply valve of each feeding room, wherein the air exhaust rate is positively correlated with the air supply grade, and the air supply grade of the adjacent period is continuously increased or decreased or unchanged.

After adjusting the air supply levels of the air supply air valves of the feeding rooms, the control system correspondingly adjusts the air exhaust levels of the air outlet air valves of the feeding rooms according to the new air supply levels. For example, if the supply level of the supply air valve of the feeding room a is lowered, the control system also lowers the exhaust level of the supply air valve of the feeding room a to maintain the pressure difference between the feeding rooms stable.

By monitoring the opening and closing conditions of doors and windows of each feeding room and increasing the working tasks of the corresponding air supply valves of the feeding room based on the detected opening and closing actions, the real-time environment change of the experimental animal feeding room can be responded quickly, and the pressure difference in the feeding room is ensured to be stable. The working tasks of the same air supply valve in the same time period are overlapped, and the overlapped result is adjusted so that the air supply level of the overlapped result in the adjacent time period is continuously increased or decreased or unchanged, smooth transition of air quantity control is realized, and pressure difference fluctuation caused by air quantity mutation is avoided.

In addition, S4 further includes the following steps:

setting a starting time point and a stabilizing time point of a switching task based on the mode conversion time point and the obtained working time sequence of the working task; in the switching process from the daytime mode to the night mode, the air supply level from the starting time point to the stable time point is gradually reduced until zero; in the switching process from the night mode to the daytime mode, the air supply level from the starting time point to the stable time point is gradually increased from zero until the air supply level is stable;

For example, if the theoretical air supply level of a feeding house is 5 levels, the switching task generated by switching from the daytime mode to the night mode is a change from the extra air supply level of 3 levels to the extra air supply level of 0 levels, and the change is kept until the mode is changed again after the theoretical air supply level of the feeding house reaches 0 levels; the peak time point is the time point when the additional air supply level reaches level 0. The switching task generated by switching from night mode to daytime mode is the change from 0-level air supply level to 3-level air supply level, and the switching task is continuously present after reaching 3-level and remains unchanged until the mode is changed again; the peak time point is the time point when the additional air supply level reaches 3 levels.

In summary, by calculating the total air supply rate of each period, if the total air supply rate is greater than the preset maximum air supply rate, according to the sequence of the pressure gradient, from the feeding room with the minimum pressure difference to the feeding room with the maximum pressure difference, the peak time point and the working termination time point of the corresponding air supply air valve are delayed after the feeding room by feeding room, the air supply grade corresponding to the peak time point is reduced, the dynamic optimization of air volume control is realized, and the overload of a fan is avoided. By adjusting the air exhaust level of the air outlet valve of each feeding room based on the air supply level of the air supply valve of each feeding room, the coordination control between air supply and air exhaust is realized, so that the pressure difference stability of the feeding room is ensured, the air quality in the feeding room is ensured, and the safety and reliability of an experiment are improved.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.

In one embodiment, a constant pressure variable air volume control device for a barrier-level laboratory animal room is provided, and the constant pressure variable air volume control device for the barrier-level laboratory animal room is in one-to-one correspondence with the constant pressure variable air volume control method for the barrier-level laboratory animal room in the above embodiment. The constant-pressure variable air volume control device for the barrier-level experimental animal house comprises a mode selection module, a parameter adjustment module, a calculation module and an adjustment module. The functional modules are described in detail as follows:

the parameter adjusting module is used for adjusting and setting the theoretical pressure difference of each functional area and adjusting the ventilation rate of each functional area based on a night mode, wherein the theoretical pressure difference of each functional area is set according to a preset pressure control gradient, and the functional areas comprise a cleaning corridor, a feeding room and a dirt corridor;

The specific limitation of the constant pressure variable air volume control device for the barrier-level laboratory animal room can be referred to as the limitation of the constant pressure variable air volume control method for the barrier-level laboratory animal room hereinabove, and the description thereof is omitted herein. All or part of each module in the constant-pressure variable air volume control device for the barrier-level experimental animal house can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In one embodiment, a computer device is provided, which may be a server. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer equipment is used for data related to a constant-pressure variable air volume control method for the barrier-level experimental animal house. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize a constant-pressure variable air volume control method for the barrier-level experimental animal house.

In an embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement the constant pressure variable air volume control method for the barrier-level laboratory animal room of the above embodiment, for example, S1 to S4 shown in fig. 1. Alternatively, the processor may execute a computer program to realize the functions of each module/unit of the constant-pressure variable-air-volume control device for the barrier-level laboratory animal room in the above embodiment. To avoid repetition, no further description is provided here.

In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, which when executed by a processor, implements the method for controlling the constant pressure variable air volume for the barrier-level laboratory animal room according to the above embodiment, for example, S1 to S4 shown in fig. 1. Alternatively, the computer program when executed by the processor realizes the functions of each module/unit in the constant pressure variable air volume control device for the barrier-level laboratory animal room in the above device embodiment. To avoid repetition, no further description is provided here.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments of the present application may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. A constant-pressure variable air volume control method for a barrier-level experimental animal house is characterized by comprising the following steps:

2. The air volume control method according to claim 1, wherein S2 includes the sub-steps of:

3. The air volume control method according to claim 2, wherein S3 includes the sub-steps of:

4. A method according to claim 3, wherein S4 includes the steps of:

5. The air volume control method according to claim 4, wherein S4 further comprises the substeps of:

6. The air volume control method according to claim 5, wherein the step of presetting the operation timing of each operation task based on the night mode by using the process from the start to the end of the one-time air supply rate adjustment of the air supply air valves of each feeding room as one operation task comprises:

dividing the time axis into time periods, and enabling the work task to correspond to each time period of the time axis according to the work time sequence;

and carrying out air supply grade division on the theoretical air supply rate corresponding to the local work task in each time period on the time axis, wherein the air supply grade in the adjacent time period is continuously increased or decreased or unchanged, and the air supply grade of one work task is increased and decreased on the time axis.

7. The method of claim 6, wherein the step of analyzing the relationship between the total air supply rate and the preset maximum air supply rate among all the feeding rooms at different time points, and adjusting the peak time point and the end time point if the total air supply rate is greater than the preset maximum air supply rate comprises:

Monitoring the opening and closing conditions of doors and windows of all the rearing rooms, and increasing the working tasks of the air supply valves of the corresponding rearing rooms based on the detected opening and closing actions;

overlapping the working tasks of the same air supply valve in the same time period, and adjusting the overlapping result to enable the air supply level of the overlapping result in the adjacent time period to be continuously increased or decreased or unchanged;

calculating the total air supply rate of all the feeding rooms in different time periods, if the total air supply rate of all the feeding rooms in a certain time period is larger than the preset maximum air supply rate, according to the opening and closing sequence of doors and windows of the feeding rooms, delaying the peak time point and the working termination time point of the corresponding air supply air valve after each feeding room, and reducing the air supply grade corresponding to the peak time point until the total air supply rate is smaller than or equal to the preset maximum air supply rate;

and adjusting the exhaust rate of the air outlet valve of each feeding room based on the air supply grade of the air outlet valve of each feeding room, wherein the exhaust rate is positively correlated with the air supply grade, and the air supply grade in the adjacent period is continuously increased or decreased or unchanged.

8. A constant pressure variable air volume control system for a barrier-level experimental animal house is characterized by comprising:

9. A computer device, comprising:

one or more processors;

a memory;

one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to: a constant pressure variable air volume control method for a barrier-grade laboratory animal house according to any one of claims 1 to 7 is performed.

10. A computer-readable storage medium storing at least one instruction, at least one program, code set, or instruction set, the at least one instruction, the at least one program, the code set, or instruction set being loaded and executed by the processor to implement: the method for controlling constant pressure variable air volume for a barrier-grade laboratory animal house according to any one of claims 1 to 7.