CN116627183A - Air quantity accurate control method and device for exhaust system and exhaust system - Google Patents

Air quantity accurate control method and device for exhaust system and exhaust system Download PDF

Info

Publication number
CN116627183A
CN116627183A CN202310199204.1A CN202310199204A CN116627183A CN 116627183 A CN116627183 A CN 116627183A CN 202310199204 A CN202310199204 A CN 202310199204A CN 116627183 A CN116627183 A CN 116627183A
Authority
CN
China
Prior art keywords
air
pressure loss
air quantity
exhaust
exhaust system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310199204.1A
Other languages
Chinese (zh)
Inventor
马群
姚晟
化亚魏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Guangjie Environmental Protection Group Co ltd
Original Assignee
Shenzhen Guangjie Environmental Protection Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Guangjie Environmental Protection Group Co ltd filed Critical Shenzhen Guangjie Environmental Protection Group Co ltd
Priority to CN202310199204.1A priority Critical patent/CN116627183A/en
Publication of CN116627183A publication Critical patent/CN116627183A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

The invention relates to the technical field of ventilation control in production and manufacture, in particular to a method and a device for precisely controlling the air quantity of an exhaust system and the exhaust system, comprising the following steps: acquiring the number of the devices and the cabinet door switch state of each device; determining the valve opening of each device according to the cabinet door opening and closing state of each device; determining the required air discharge quantity according to the quantity of the devices and the valve opening degree of each device; determining pipe network pressure loss according to the required exhaust amount; and determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss. The method provided by the invention determines the opening degree of each valve according to the opening and closing states of the equipment cabinet doors and the equipment quantity, further determines the required exhaust air quantity in real time, determines the pressure loss of the pipe network according to the required exhaust air quantity, and obtains the working frequency of the fan according to the required exhaust air quantity and the pressure loss of the pipe network, thereby realizing the accurate control of the fan, effectively preventing the fan from exhausting insufficient or being in a full-load working state for a long time, and reducing the energy consumption.

Description

Air quantity accurate control method and device for exhaust system and exhaust system
Technical Field
The invention relates to the technical field of ventilation control in production and manufacture, in particular to a method and a device for precisely controlling the air quantity of an exhaust system and the exhaust system.
Background
In the processing process of mobile phone parts, automobile parts, hardware tools and the like, a large amount of aerosol can be generated by a processing machine tool. The novel numerical control machine tool is generally provided with a closed cabinet, and aerosol is collected by connecting the closed cabinet with an exhaust pipeline.
Conventionally, the total air volume is generally calculated according to the air volume when each device is opened and the air volume when each device is closed. The air intake when the door is opened can be calculated according to the air intake calculation method of the fume hood, and the air intake when the door is closed can be calculated according to the air intake calculation method of the closed cabinet. The door opening times of the traditional method are generally calculated according to the door opening rate. In order to meet the use requirement, engineering technicians generally have larger door opening rate, so that the actual ventilation quantity in most operating time periods is far greater than the actual required air quantity, and a large amount of electric energy is wasted.
How to control the ventilation of the exhaust system more accurately to reduce the energy consumption of the system is a problem to be solved.
Disclosure of Invention
Accordingly, it is necessary to provide a method and a device for precisely controlling the air volume of an exhaust system and an exhaust system for solving the above problems.
The embodiment of the invention is realized in such a way that the air quantity of the air exhaust system is accurately controlled, and the air quantity of the air exhaust system is accurately controlled by the method comprising the following steps:
acquiring the number of the devices and the cabinet door switch state of each device;
determining the valve opening of each device according to the cabinet door opening and closing state of each device;
determining the required air discharge quantity according to the quantity of the devices and the valve opening degree of each device;
determining pipe network pressure loss according to the required exhaust amount;
and determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
In one embodiment, the present invention provides an air volume accurate control device for an exhaust system, the air volume accurate control device for an exhaust system includes:
the acquisition module is used for acquiring the number of the devices and the cabinet door switch state of each device;
the opening calculating module is used for determining the valve opening of each device according to the cabinet door opening and closing state of each device;
the exhaust air quantity calculating module is used for determining the required exhaust air quantity according to the quantity of the equipment and the valve opening degree of each equipment;
the pressure loss calculation module is used for determining the pressure loss of the pipe network according to the required exhaust air quantity;
and the fan control module is used for determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
In one embodiment, the present invention provides an air volume accurate control system of an exhaust system, the air volume accurate control system of the exhaust system includes:
a blower for forming negative pressure to achieve exhaustion;
the pipeline system is respectively connected with the cabinet of each equipment and is used for extracting air from the equipment cabinet, the pipeline system is provided with a valve for each equipment, and the fan is arranged in the pipeline system; and
and the computer equipment is used for executing the steps of the air quantity accurate control method of the exhaust system.
The air quantity accurate control method of the air exhaust system provided by the invention determines the opening degree of each valve according to the opening and closing states of the cabinet doors of the equipment and the quantity of the equipment, further determines the required air exhaust quantity in real time, determines the pressure loss of a pipe network according to the required air exhaust quantity, and obtains the working frequency of the fan according to the required air exhaust quantity and the pressure loss of the pipe network, thereby realizing the accurate control of the fan, effectively preventing the fan from exhausting insufficiently or being in a full-load working state for a long time, and reducing the energy consumption.
Drawings
FIG. 1 is an application environment diagram of a method for precisely controlling the air volume of an exhaust system according to an embodiment;
FIG. 2 is a partial diagram of an embodiment of an air volume control method for an exhaust system applied to a data machine;
FIG. 3 is a flow chart of a method for precisely controlling the air volume of an exhaust system according to an embodiment;
FIG. 4 is a schematic diagram of device status provided by one embodiment;
FIG. 5 is a block diagram of an embodiment of a device for precisely controlling the air volume of an exhaust system;
FIG. 6 is a block diagram of the internal architecture of a computer device in one embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another element. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of this disclosure.
Fig. 1 is an application environment diagram of an air volume accurate control method of an exhaust system provided in an embodiment, as shown in fig. 1, in the application environment, the method comprises a plurality of devices, the devices are connected through air pipes, each device is set to be a control cabinet, valves are arranged between the air pipes and each device, and the air suction volume of each device is controlled by controlling the opening of the valves. The tail end of the air duct is also provided with a purifying device and a variable frequency fan, and the purifying device and the variable frequency fan are controlled by computer equipment. Each valve is connected with a logic unit, and the logic unit executes instructions of computer equipment so as to control the valve to execute corresponding actions.
Generally, as shown in fig. 2, taking the application of the present invention to a data machine tool as an example, the state of a cabinet door of the data machine tool is collected by an induction device (such as a travel switch) and transmitted to a computer device, the valve is specifically an electric valve, and the computer device at the rear end controls the rotation speed of a variable frequency fan by collecting the state of the cabinet door of the data machine tool, so that the precise control of the present invention is realized, and the specific control process refers to the specific contents of the following embodiments.
As shown in fig. 3, in one embodiment, a method for precisely controlling the air volume of an exhaust system is provided, which specifically includes the following steps:
step S100, acquiring the number of the devices and the cabinet door switch state of each device;
step S200, determining the valve opening of each device according to the cabinet door opening and closing state of each device;
step S300, determining the required air discharge quantity according to the quantity of the devices and the valve opening degree of each device;
step S400, determining pipe network pressure loss according to the required exhaust amount;
and S500, determining the working frequency of the control fan according to the required air discharge quantity and the pipe network pressure loss.
In this embodiment, whether the cabinet door of each device is opened or not may affect the amount of air entering the device, thereby directly affecting the amount of air drawn by the blower. When the cabinet door is opened, air can easily enter the equipment, and at the moment, if the air suction air is consistent with the air suction air when the cabinet door is not opened, the air generated in the equipment cannot be dispersed and overflowed into a factory environment due to insufficient suction, and cannot be effectively discharged; if the fan is kept to run at the highest speed, the energy consumption is seriously wasted when the cabinet door is not opened. The present invention therefore requires control in combination with the open state of the cabinet door of the device.
In this embodiment, the opening and closing states of the cabinet doors of the devices can control the opening and closing states of the doors of the devices, and the rotation speed of the fan is adjusted according to the opening and closing states of the controlled valves, so that the rotation speed of the fan is adapted to the opening and closing states of the doors of the devices.
In this embodiment, another important effect of the fan speed is the pressure loss of the pipeline network, and the different exhaust air amounts have different effects on the pressure loss, and the pressure loss is a function of the required exhaust air amount, so the invention further considers the effect of the pressure loss of the pipeline network.
In this embodiment, the fan is controlled by the frequency converter, and the computer device outputs a control signal to the frequency converter, and the frequency converter changes the rotation speed by changing the power frequency of the fan, so that the rotation speed can be adjusted in a larger range, and the automation of the adjustment action can be realized.
The air quantity accurate control method of the air exhaust system provided by the invention determines the opening degree of each valve according to the opening and closing states of the cabinet doors of the equipment and the quantity of the equipment, further determines the required air exhaust quantity in real time, determines the pressure loss of a pipe network according to the required air exhaust quantity, and obtains the working frequency of the fan according to the required air exhaust quantity and the pressure loss of the pipe network, thereby realizing the accurate control of the fan, effectively preventing the fan from exhausting insufficiently or being in a full-load working state for a long time, and reducing the energy consumption.
As an alternative of the embodiment of the present invention, the determining, by using the cabinet door opening and closing state of each device, the valve opening of each device includes:
judging whether the cabinet door of each device is opened or not respectively, and if so, setting the valve opening of the corresponding device to be 1;
if not, judging whether the cabinet door of each device is opened in the previous T time period, and if so, obtaining the opening of the valve according to the ratio of the closed time period T to the closed time period T;
if the valve is not opened in the previous T time period, the valve opening of the corresponding equipment is 0.
In this embodiment, the valve opening is between 0 and 1, where 0 to 1 is a standardized measure of the true valve opening, and may be used to indicate the valve opening degree, i.e., 1 percent of the valve is open, and 0 is closed. In this embodiment, unlike the conventional calculation method, the present invention further considers the influence of the air that has entered the interior of the apparatus after each opening and reclosing of the valve on the required air discharge amount, and at this time, the influence of the driving on the current state is measured by setting an influence time T. Here T may be 2 times the ratio of the volume of air in the device to the maximum exhaust volume of the device. It can be understood that the value of T is 0-T when calculating, when T is greater than or equal to T, the influence of opening the cabinet door is considered to be disappeared, and if the corresponding equipment is not communicated with the outside, the valve opening of the corresponding equipment is 0 at the moment.
As an alternative to the embodiment of the present invention, the required exhaust air volume is determined by the following formula:
wherein:
n is the required exhaust volume; />The air discharge quantity of the fume hood; />The air discharge quantity of the closed cabinet; />The delay air discharge quantity of the fume hood; />、/>And +.>The valve numbers of the three states of the fume hood, the closed cabinet and the delay of the fume hood are respectively, and +.>+/>+/>=m, m is the number of devices;
the gas emission amount in the cabinet; />Suction wind speed for the window section of the device; />Is the area of the device window; />Taking 1.1-1.2 as a safety coefficient;
the induction air quantity brought into the cabinet when the materials fall; />Is the amount of air taken in from the orifice or the imprecise slit.
In this embodiment, as shown in fig. 4, when the air inlet (1) (specifically, a cabinet door) is opened, the device is in a state of a fume hood, and air can enter the device from the air inlet (1); when the air inlet (1) is closed, the equipment is in a sealed cabinet state, and in the sealed cabinet state, the equipment sucks air from the outside through gaps, holes and the like.
In this embodiment, in addition to the two states of the fume hood and the seal cabinet, a delay state of the fume hood is set, and this state refers to a state in which the cabinet door of the apparatus is opened within the time T, and the influence caused by the opening of the cabinet door into the apparatus is not completely eliminated, and is interposed between the fume hood and the seal cabinet.
As an alternative of the embodiment of the present invention, the delay air discharge rate of the fume hood is calculated by the following formula:
wherein:
the induction air quantity brought into the cabinet when the materials fall; />An amount of air taken in from an orifice or an imprecise slit;the gas emission amount in the cabinet; />Suction wind speed for the window section of the device; />Is the area of the device window; />Taking 1.1-1.2 as a safety factor.
In the embodiment, a calculation mode of the delay air discharge quantity of the ventilating cabinet is specifically provided, and the situation that the cabinet door is closed after being opened is fully considered, so that a result obtained by calculation is more accurate.
As an alternative to the embodiment of the present invention, the pipe network pressure loss is calculated by the following formula:
wherein:is the pipe network pressure loss; />The pressure loss of a single fume hood; />The number of valves in the state of the fume hood; />For the pressure loss of a single closed cabinet +.>Is the number of devices.
In this embodiment, the pressure loss of the duct is directly related to the state of the current cabinet door, and the aforementioned delay state of the fume hood indirectly affects the pressure loss of the duct by affecting the required amount of exhaust air.
As an alternative to an embodiment of the present invention, the pressure loss of a single fume hood is calculated by the following formula:
wherein:the pressure loss of the branch pipe when the valve is completely opened; />Is the pressure loss of the main pipe and the equipment under the maximum air quantity; />n is the required exhaust volume; />Is the maximum exhaust air quantity.
In this embodiment, the pressure loss of the piping network is only related to the current exhaust air quantity (variable), and other influencing factors are certain in one specific system. Wherein, for a particular system,and->Are all constant values and can be obtained by measurement.
As an alternative to the embodiment of the present invention, the pressure loss of a single closed cabinet is calculated by the following formula:
wherein:the theoretical pressure loss of the branch pipe when the valve is completely closed; />Is the pressure loss of the main pipe and the equipment under the maximum air quantity; />n is the required exhaust volume; />Is the maximum exhaust air quantity.
In this embodiment, the pressure loss of the piping network is only related to the current exhaust air quantity (variable), and other influencing factors are certain in one specific system. Wherein, for a particular system,and->Are all constant values and can be obtained by measurement.
As an alternative of the embodiment of the present invention, the determining, by the required exhaust air volume and the pipe network pressure loss, the working frequency of the control fan includes:
from P y = (w0×y)/3600 calculates the effective power of the blower;
obtaining the required rotating speed of the wind speed according to the relation between the rotating speed of the fan and the effective power;
controlling the output of the frequency converter to obtain a required rotating speed;
wherein: p (P) y The effective power of the fan; w0 is the maximum exhaust air quantity; y is pipe network pressure loss.
In this embodiment, the effective power of the fan is proportional to the 3 rd power of the revolution, and the ratio can be calculated by means of the rated effective power and the rated rotational speed, so that the real-time corresponding rotational speed is calculated by the real-time effective power. The present invention is not repeated for how to control the fan to obtain the corresponding rotation speed by the output of the frequency converter, which belongs to the prior art.
As shown in fig. 5, the embodiment of the present invention further provides an air volume accurate control device of an exhaust system, where the air volume accurate control device of the exhaust system includes:
the acquisition module is used for acquiring the number of the devices and the cabinet door switch state of each device;
the opening calculating module is used for determining the valve opening of each device according to the cabinet door opening and closing state of each device;
the exhaust air quantity calculating module is used for determining the required exhaust air quantity according to the quantity of the equipment and the valve opening degree of each equipment;
the pressure loss calculation module is used for determining the pressure loss of the pipe network according to the required exhaust air quantity;
and the fan control module is used for determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
In this embodiment, the air volume accurate control device of the exhaust system is modularized in the method of the present invention, and for specific explanation of each module, please refer to the content of the foregoing embodiment, the present invention is not repeated here.
The embodiment of the invention also provides an air quantity accurate control system of the air exhaust system, which comprises:
a blower for forming negative pressure to achieve exhaustion;
the pipeline system is respectively connected with the cabinet of each equipment and is used for extracting air from the equipment cabinet, the pipeline system is provided with a valve for each equipment, and the fan is arranged in the pipeline system; and
and the computer equipment is used for executing the steps of the air quantity accurate control method of the exhaust system.
In this embodiment, reference may be made to the content of the environment part of the implementation of the present invention and the content of fig. 1 and 2 of the specification for the arrangement of the system. According to the scheme provided by the invention, the computer equipment executes the steps of the air quantity accurate control method of the air exhaust system, the opening degree of each valve is determined according to the opening and closing states of the equipment cabinet doors and the equipment quantity, the required air exhaust quantity is further determined in real time, the pressure loss of a pipe network is determined according to the required air exhaust quantity, and the working frequency of the fan is obtained according to the required air exhaust quantity and the pressure loss of the pipe network, so that the accurate control of the fan is realized, the condition that the fan is insufficient in air exhaust or is in full-load working for a long time can be effectively prevented, and the energy consumption is reduced.
FIG. 6 illustrates an internal block diagram of a computer device in one embodiment. As shown in fig. 6, the computer device includes a processor, a memory, a network interface, an input device, and a display screen connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The nonvolatile storage medium of the computer equipment stores an operating system and also can store a computer program, and when the computer program is executed by a processor, the processor can realize the accurate control method for the air quantity of the air exhaust system provided by the embodiment of the invention. The internal memory can also store a computer program, and when the computer program is executed by the processor, the processor can be enabled to execute the air quantity accurate control method of the exhaust system provided by the embodiment of the invention. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in FIG. 6 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, the air volume accurate control device of the exhaust system provided by the embodiment of the invention can be implemented in the form of a computer program, and the computer program can run on a computer device as shown in fig. 6. The memory of the computer device may store various program modules constituting the air volume accurate control device of the exhaust system, such as an acquisition module, an opening calculation module, an exhaust amount calculation module, a pressure loss calculation module, and a fan control module shown in fig. 5. The computer program constituted by the respective program modules causes the processor to execute the steps in the air volume precision control method for the exhaust system of the respective embodiments of the present invention described in the present specification.
For example, the computer device shown in fig. 6 may execute step S100 by the acquisition module in the air volume precision control apparatus of the exhaust system shown in fig. 5; the computer equipment can execute the step S200 through the opening degree calculation module; the computer equipment can execute the step S300 through the exhaust air quantity calculating module; the computer equipment can execute the step S400 through the pressure loss calculation module; the computer device may perform step S500 through the fan control module.
In one embodiment, a computer device is presented, the computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring the number of the devices and the cabinet door switch state of each device;
determining the valve opening of each device according to the cabinet door opening and closing state of each device;
determining the required air discharge quantity according to the quantity of the devices and the valve opening degree of each device;
determining pipe network pressure loss according to the required exhaust amount;
and determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which when executed by a processor causes the processor to perform the steps of:
acquiring the number of the devices and the cabinet door switch state of each device;
determining the valve opening of each device according to the cabinet door opening and closing state of each device;
determining the required air discharge quantity according to the quantity of the devices and the valve opening degree of each device;
determining pipe network pressure loss according to the required exhaust amount;
and determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein 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.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The method for precisely controlling the air quantity of the air exhaust system is characterized by comprising the following steps of:
acquiring the number of the devices and the cabinet door switch state of each device;
determining the valve opening of each device according to the cabinet door opening and closing state of each device;
determining the required air discharge quantity according to the quantity of the devices and the valve opening degree of each device;
determining pipe network pressure loss according to the required exhaust amount;
and determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
2. The method for precisely controlling the air quantity of the air exhaust system according to claim 1, wherein the determining the valve opening of each device according to the cabinet door opening and closing state of each device comprises:
judging whether the cabinet door of each device is opened or not respectively, and if so, setting the valve opening of the corresponding device to be 1;
if not, judging whether the cabinet door of each device is opened in the previous T time period, and if so, obtaining the opening of the valve according to the ratio of the closed time period T to the closed time period T;
if the valve is not opened in the previous T time period, the valve opening of the corresponding equipment is 0.
3. The method for precisely controlling the air quantity of an air exhaust system according to claim 1, wherein the required air quantity is determined by the following formula:
wherein:
n is the required exhaust volume; />The air discharge quantity of the fume hood; />The air discharge quantity of the closed cabinet; />The delay air discharge quantity of the fume hood; />、/>And +.>The valve numbers of the three states of the fume hood, the closed cabinet and the delay of the fume hood are respectively, and +.>+/>+/>=m, m is the number of devices;
the gas emission amount in the cabinet; />Suction wind speed for the window section of the device; />Is the area of the device window; />Taking 1.1-1.2 as a safety coefficient;
attraction brought into cabinet when material fallsAn air quantity; />Is the amount of air taken in from the orifice or the imprecise slit.
4. The method for precisely controlling the air quantity of the air exhaust system according to claim 3, wherein the delay air quantity of the fume hood is calculated by the following formula:
wherein:
the induction air quantity brought into the cabinet when the materials fall; />An amount of air taken in from an orifice or an imprecise slit; />The gas emission amount in the cabinet; />Suction wind speed for the window section of the device; />Is the area of the device window; />Taking 1.1-1.2 as a safety factor.
5. The method for precisely controlling the air quantity of the air exhaust system according to claim 1, wherein the pipe network pressure loss is calculated by the following formula:
wherein:is the pipe network pressure loss; />The pressure loss of a single fume hood; />The number of valves in the state of the fume hood; />For the pressure loss of a single closed cabinet +.>Is the number of devices.
6. The method for precisely controlling the air quantity of an exhaust system according to claim 5, wherein the pressure loss of the single fume hood is calculated by the following formula:
wherein:the pressure loss of the branch pipe when the valve is completely opened; />Is the pressure loss of the main pipe and the equipment under the maximum air quantity; />n is the required exhaust volume; />Is the maximum exhaust air quantity.
7. The method for precisely controlling the air quantity of an exhaust system according to claim 5, wherein the pressure loss of the single closed cabinet is calculated by the following formula:
wherein:the theoretical pressure loss of the branch pipe when the valve is completely closed; />Is the pressure loss of the main pipe and the equipment under the maximum air quantity; />n is the required exhaust volume; />Is the maximum exhaust air quantity.
8. The method for precisely controlling the air quantity of the air exhaust system according to claim 1, wherein the determining and controlling the working frequency of the fan according to the required air quantity and the pipe network pressure loss comprises the following steps:
from P y = (w0×y)/3600 calculates the effective power of the blower;
obtaining the required rotating speed of the wind speed according to the relation between the rotating speed of the fan and the effective power;
controlling the output of the frequency converter to obtain a required rotating speed;
wherein: p (P) y The effective power of the fan; w0 is the maximum exhaust air quantity; y is pipe network pressure loss.
9. The utility model provides an accurate controlling means of exhaust system amount of wind which characterized in that, the accurate controlling means of exhaust system amount of wind includes:
the acquisition module is used for acquiring the number of the devices and the cabinet door switch state of each device;
the opening calculating module is used for determining the valve opening of each device according to the cabinet door opening and closing state of each device;
the exhaust air quantity calculating module is used for determining the required exhaust air quantity according to the quantity of the equipment and the valve opening degree of each equipment;
the pressure loss calculation module is used for determining the pressure loss of the pipe network according to the required exhaust air quantity;
and the fan control module is used for determining and controlling the working frequency of the fan according to the required air discharge quantity and the pipe network pressure loss.
10. The utility model provides an exhaust system amount of wind accurate control system which characterized in that, exhaust system amount of wind accurate control system includes:
a blower for forming negative pressure to achieve exhaustion;
the pipeline system is respectively connected with the cabinet of each equipment and is used for extracting air from the equipment cabinet, the pipeline system is provided with a valve for each equipment, and the fan is arranged in the pipeline system; and
computer equipment for executing the steps of the air volume accurate control method of an exhaust system according to any one of claims 1 to 8.
CN202310199204.1A 2023-03-03 2023-03-03 Air quantity accurate control method and device for exhaust system and exhaust system Pending CN116627183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310199204.1A CN116627183A (en) 2023-03-03 2023-03-03 Air quantity accurate control method and device for exhaust system and exhaust system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310199204.1A CN116627183A (en) 2023-03-03 2023-03-03 Air quantity accurate control method and device for exhaust system and exhaust system

Publications (1)

Publication Number Publication Date
CN116627183A true CN116627183A (en) 2023-08-22

Family

ID=87625397

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310199204.1A Pending CN116627183A (en) 2023-03-03 2023-03-03 Air quantity accurate control method and device for exhaust system and exhaust system

Country Status (1)

Country Link
CN (1) CN116627183A (en)

Similar Documents

Publication Publication Date Title
CN108647428B (en) Turbofan engine adaptive component level simulation model construction method
CN111125909B (en) Automatic calibration method of one-dimensional automobile thermal management model
CN111445105B (en) Power plant online performance diagnosis method and system based on target value analysis
CN110647052A (en) Variable cycle engine mode switching self-adaptive identity card model construction method
WO2023000551A1 (en) Target exhaust temperature determination method
CN112563544B (en) Method and device for controlling air compressor of fuel cell under low current
CN110928341B (en) Temperature control method, device, equipment and storage medium
CN116627183A (en) Air quantity accurate control method and device for exhaust system and exhaust system
CN113006955B (en) Full-closing control method and device for EGR valve, computer equipment and storage medium
KR20240047419A (en) Rotational speed control methods, systems, devices and storage media
CN116108706B (en) Wind tunnel circumferential seam type pressure regulating valve preset opening degree estimation method
CN112699549A (en) CDFS structure-containing aeroengine nonlinear model modeling system and modeling method
CN102182575B (en) Equipment and method for controlling air system of diesel engine
CN109344522B (en) Method and system for calculating grinding quantity of stationary blade of axial flow compressor
CN116663168A (en) Turbine-level working parameter determining method and device, electronic equipment and storage medium
CN116466038A (en) Method and device for online detection of baking moisture in battery production
CN113775424B (en) EGR control method and device and electronic equipment
CN113343390B (en) Engine linearization modeling method based on neural network nonlinear model
CN112507476B (en) Integrated modeling method for variable geometry air inlet channel and engine
CN112051066B (en) Method, device, equipment and medium for measuring flow characteristic of steam inlet governing valve of small steam turbine
Ma et al. Multi-stage axial flow compressors characteristics estimation based on system identification
CN114595537A (en) Smoke exhaust ventilator outlet wind pressure prediction method and system, storage medium and processing terminal
CN108906836B (en) Air volume matching collection processing method for waste gas with multiple discharge points
CN114233481B (en) Single cylinder engine air inlet and outlet control method and device, electronic control unit and medium
CN116502568B (en) Method, device, equipment and medium for automatically simulating internal flow characteristics of gas compressor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination