CN117046856A

CN117046856A - Air quantity control method, exhaust cabinet and computer storage medium

Info

Publication number: CN117046856A
Application number: CN202311323599.8A
Authority: CN
Inventors: 阮红正; 卢丙利; 谢长军
Original assignee: E3 Green Technology Co ltd
Current assignee: E3 Green Technology Co ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2023-11-14
Anticipated expiration: 2043-10-12
Also published as: CN117046856B

Abstract

The invention discloses an air quantity control method, an exhaust cabinet and a computer storage medium, wherein the air quantity control method comprises the following steps: determining that the air quantity control system is in a first working mode; acquiring the exhaust quantity of an exhaust valve; determining a calculated air supplementing value corresponding to the current air exhausting quantity; comparing the calculated air supplementing value with an air supplementing reference value; if the calculated air supplementing value is greater than or equal to the air supplementing reference value, the air supplementing valve supplements air by the air supplementing reference value; if the air supply value is smaller than the air supply reference value, the air supply valve calculates an air supply value for supplying air; acquiring a first air supplementing quantity of an air supplementing valve; determining a first calculated exhaust value corresponding to the current first air supplementing quantity; comparing the first calculated exhaust air value with an exhaust air reference value; if the first calculated exhaust value is larger than the exhaust reference value, the exhaust valve exhausts air by the first calculated exhaust value; if the air exhaust reference value is smaller than or equal to the air exhaust reference value, the air exhaust valve exhausts air by the air exhaust reference value. The invention can link the exhaust valve and the air supplementing valve to realize variable air volume control of the exhaust valve and the air supplementing valve of the air volume control system, thereby achieving the purposes of energy saving and safety.

Description

Air quantity control method, exhaust cabinet and computer storage medium

Technical Field

The invention relates to the technical field of air quantity control of exhaust cabinets, in particular to an air quantity control method, an exhaust cabinet and a computer storage medium.

Background

Ventilation devices can be generally described as devices for exhausting gases such as exhaust gases, harmful gases and particulate matters in a working space to outside (usually outdoors) the working space, and such devices have wide application in industry and life, for example, factory buildings for generating toxic harmful gases or particulate matters in industrial production, biological and chemical laboratories of research and development institutions, kitchen for generating cooking fume, etc., which require ventilation devices to isolate toxic gases and particulate matters in a working space from users, prevent users from inhaling toxic harmful gases and particulate matters, and exhaust toxic harmful gases and particulate matters to outside.

Fume hoods are important equipment in laboratories to control contaminants. The function of the control cabinet is that pollutants emitted in the control cabinet are smoothly discharged outdoors, and the pollutants cannot be dissipated indoors through the operation opening of the exhaust cabinet, so that the health and safety of experimental staff are endangered.

The exhaust cabinet is equipment with the largest energy consumption in a laboratory, and in order to reduce the energy consumption, variable air volume control is introduced, so that windows are at different heights, and the air volume is different, so that the purpose of reducing the air volume is achieved. In order to reduce the air quantity extracted from the indoor space, an outdoor air supplementing technology is invented.

However, the variable air volume control is realized on the basis of outdoor air supplement, and the air exhaust and air supplement actions of the exhaust cabinet are asynchronous, so that pollutants are leaked, and the personal safety of experimental staff is influenced.

Disclosure of Invention

The invention aims to solve the problems of turbulent flow of air flow tissue, leakage of pollutants and harm to experimenters caused by asynchronous exhaust and air supplementing actions in an air quantity variable air supplementing type exhaust cabinet. The invention provides an air quantity control method, an air exhaust cabinet and a computer storage medium, which can be used for linking an air exhaust valve and an air supplementing valve, so as to realize variable air quantity control on the air exhaust valve and the air supplementing valve of an air quantity control system applied to the air exhaust cabinet, and achieve the purposes of energy conservation and safety.

In order to solve the technical problems, the embodiment of the invention discloses an air volume control method which is applied to an air volume control system, wherein the air volume control system comprises an exhaust valve and an air supplementing valve; the air volume control method comprises the following steps: determining that the air quantity control system is in a first working mode; acquiring the exhaust quantity of the exhaust valve; determining a calculated air supplementing value corresponding to the current air exhausting quantity; comparing the calculated air supplementing value with an air supplementing reference value; if the calculated air supplementing value is greater than or equal to the air supplementing reference value, the air supplementing valve supplements air by the air supplementing reference value; if the calculated air supplementing value is smaller than the air supplementing reference value, the air supplementing valve supplements air by the calculated air supplementing value; acquiring a first air supplementing quantity of the air supplementing valve; determining a first calculated exhaust value corresponding to the current first air supplementing quantity; comparing the first calculated exhaust air value with an exhaust air reference value; if the first calculated exhaust value is larger than the exhaust reference value, the exhaust valve exhausts air by the first calculated exhaust value; and if the first calculated exhaust value is smaller than or equal to the exhaust reference value, the exhaust valve exhausts air by the exhaust reference value.

According to another specific embodiment of the invention, the embodiment of the invention discloses an air quantity control method, and the air quantity control system is determined to be in a second working mode; acquiring a second air supplementing quantity of the air supplementing valve; determining a second calculated exhaust value corresponding to the current second air supplementing quantity; comparing the second calculated exhaust air value with an exhaust air reference value; if the second calculated exhaust value is larger than the exhaust reference value, the exhaust valve exhausts air by the second calculated exhaust value; if the second calculated exhaust value is smaller than or equal to an exhaust reference value, the exhaust valve exhausts air by the exhaust reference value; the air supplementing valve is in a closed state.

According to another embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, where the air volume control system is used for being applied to an exhaust cabinet, the exhaust cabinet includes a window, and the comparing the first calculated exhaust air value with an exhaust air reference value includes: determining the theoretical surface wind speed of the wind quantity control system; the first calculated exhaust value is V _{Meter 1} ，V _{Meter 1} =V _{Supplement 1} ÷C÷K _{Tonifying device} Wherein V is _{Supplement 1} The first air supplementing quantity of the air supplementing valve is shown at present, C shows the air supplementing proportion, K _{Tonifying device} Representing the correction percentage of the air supply; the exhaust reference value is V _{Radix Ginseng Roxburghii} ，V _{Radix Ginseng Roxburghii} =（V _{Flour with a plurality of grooves} ×K _{Flour with a plurality of grooves} ）×W×H+M _{Row of rows} Wherein V is _{Flour with a plurality of grooves} Represents the theoretical surface wind speed, K set by the wind quantity control system _{Flour with a plurality of grooves} Represents the correction percentage of the wind speed of the surface, W represents the width of the window, H represents the height of the window opening, M _{Row of rows} Indicating the exhaust correction value.

According to another embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, wherein comparing the second calculated exhaust air value with an exhaust air reference value includes: determining an idle air volume set value of the air volume control system; the second calculated exhaust value is V _{Meter 2} ，V _{Meter 2} =V _{Supplement 2} ÷C÷K _{Tonifying device} Wherein V is _{Supplement 2} The second air supplementing quantity of the air supplementing valve is shown at present, C shows the air supplementing proportion, K _{Tonifying device} Representing the correction percentage of the air supply; the exhaust reference value is V _{Radix Ginseng Roxburghii} ，V _{Radix Ginseng Roxburghii} =V _{Empty space} +M _{Row of rows} Wherein V is _{Empty space} Indicating the idle air volume set value set by the air volume control system, M _{Row of rows} Indicating the exhaust correction value.

According to another embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, wherein comparing the calculated air supplement value with an air supplement reference value includes: determining the theoretical surface wind speed of the wind quantity control system; the calculated air supplementing value is V _{Meter 3} ，V _{Meter 3} =V _{Row of rows} ×C×K _{Tonifying device} Wherein V is _{Row of rows} Represents the current exhaust quantity of the exhaust valve, C represents the air supplementing proportion, K _{Tonifying device} Representing the correction percentage of the air supply; the reference value of the air supplement is V _{Radix Ginseng for supplementing} ，V _{Radix Ginseng for supplementing} =V _{Radix Ginseng Roxburghii} ×C×K _{Tonifying device} Wherein V is _{Radix Ginseng Roxburghii} Representing the exhaust reference value of the exhaust valve.

According to another specific embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, where the air volume control system is used for being applied to an exhaust cabinet, and the determining that the air volume control system is in a first working mode includes: and detecting a first switching signal, wherein the air quantity control system is switched from a second working mode to the first working mode, and is used for enabling the exhaust cabinet to be switched from the second working mode to the first working mode.

According to another specific embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, where the air volume control system is used for being applied to an exhaust cabinet, and the determining that the air volume control system is in a second working mode includes: and detecting a second switching signal, wherein the air quantity control system is switched from the first working mode to the second working mode, and is used for enabling the exhaust cabinet to be switched from the first working mode to the second working mode.

According to another embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, wherein the detecting a first switching signal includes: the method comprises the steps of acquiring a first switching signal input by a worker through an input end.

According to another embodiment of the present invention, an embodiment of the present invention discloses an air volume control method, and the detecting of the second switching signal includes: and acquiring a second switching signal input by the staff through the input end.

According to another embodiment of the invention, the input end is a touch screen, the touch screen is provided with a first touch area and a second touch area, the first touch area is activated to output a first switching signal, and the second touch area is activated to output a second switching signal.

According to another specific embodiment of the invention, the embodiment of the invention discloses an air volume control method, when the exhaust cabinet is in the second working mode, the height of the window opening of the exhaust cabinet is a set distance, and the set distance is H, wherein H is less than or equal to 300 mm.

According to another specific embodiment of the invention, the embodiment of the invention discloses an exhaust cabinet, which comprises an air quantity control system, wherein the air quantity control system comprises an exhaust valve and an air supplementing valve, and the air quantity control system is respectively connected with the exhaust valve and the air supplementing valve; the air volume control system is used for executing the air volume control method according to any one of the embodiments.

According to another specific embodiment of the invention, the embodiment of the invention discloses an exhaust cabinet, and the exhaust valve is a pressure-independent air valve.

The embodiment of the invention also discloses a computer storage medium, which comprises a memory and a processor, wherein the memory is suitable for storing computer instructions, and the processor is suitable for executing the air volume control method according to any embodiment when the computer instructions are executed.

As described above, the present invention provides an air volume control method, including: determining the working mode of an air quantity control system; acquiring the air supplementing quantity of an air supplementing valve; and determining a calculated exhaust value corresponding to the current air supplementing quantity. Since it is necessary to ensure that the air supply amount (for example, the air supply into the exhaust cabinet) of the air supply valve of the air quantity control system is always smaller than the air discharge amount (for example, the air discharge from the exhaust cabinet) of the exhaust valve, it is necessary to set the larger value of the air supply amount and the air discharge amount as the air discharge amount of the exhaust valve. Namely, the calculated exhaust air value is compared with the exhaust air reference value: if the calculated exhaust value is larger than the exhaust reference value, the exhaust valve is used for exhausting by calculating the exhaust value; if the calculated exhaust value is smaller than or equal to the exhaust reference value, the exhaust valve exhausts air by the exhaust reference value; and determining a calculated air supplementing value corresponding to the current air exhausting quantity. When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air supply in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that smaller values of the air quantity control system and the air quantity control system are required to be set as the air quantity of the air supply valve. That is, the calculated air make-up value is compared with the air make-up reference value: if the calculated air supplementing value is greater than or equal to the air supplementing reference value, the air supplementing valve supplements air by the air supplementing reference value; if the calculated air supplementing value is smaller than the air supplementing reference value, the air supplementing valve calculates the air supplementing value and supplements air.

By adopting the technical scheme, the air quantity control method can be linked with the air exhaust valve and the air supplementing valve, when the air quantity control system is applied to an air exhaust cabinet, the energy consumption of the air exhaust cabinet is reduced through variable air quantity control, the use cost of the air exhaust cabinet is saved, the problems of high energy consumption of the air exhaust cabinet and air flow organization turbulence caused by asynchronous air exhaust and air supplementing actions in the prior art are solved, and the purposes of energy conservation and safety are achieved.

In order that the above-recited features of the present application can be understood in detail, a preferred embodiment of the application is illustrated in the accompanying drawings.

Drawings

FIG. 1 shows a first flowchart of a method for controlling air volume according to an embodiment of the present application;

FIG. 2 shows a second flowchart of a method for controlling air volume according to an embodiment of the present application;

FIG. 3a shows a front view of a fume hood according to an embodiment of the application;

FIG. 3b shows a schematic cross-sectional view of a fume hood according to an embodiment of the application;

FIG. 4 shows a third flowchart of an air volume control method according to an embodiment of the present application;

FIG. 5 shows a fourth flowchart of an air volume control method according to an embodiment of the present application;

fig. 6 is a block diagram showing a structure of an air volume control device according to an embodiment of the present application;

fig. 7 is a block diagram showing a structure of an air volume control device according to an embodiment of the present application;

FIG. 8 is a schematic perspective view of a fume hood according to an embodiment of the present invention;

FIG. 9 shows a block diagram of an electronic device provided by an embodiment of the invention;

FIG. 10 illustrates a block diagram of a system on a chip (SoC) provided by an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a touch screen according to an embodiment of the present invention.

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 11, the present application provides an air volume control method, which may be applied to an air volume control system including an air exhaust valve and an air supply valve, where the air volume control system is used for a ventilation device, such as an air exhaust cabinet, but is not limited thereto.

For easy understanding, the following embodiments of the present application are described with an application of an air volume control system to an exhaust hood as an example, where the air volume control system is used to execute the air volume control method provided by the embodiments of the present application.

As shown in fig. 1, a method flowchart of the air volume control method provided by the embodiment of the present application, according to a preset air volume control method when the air volume control system is in a second working mode (i.e. the exhaust cabinet is in the second working mode), the specific air volume control method includes:

step S1: and determining that the air quantity control system is in a second working mode.

For example, the determining unit 12 (as shown in fig. 7, for example, a variable air volume controller of the air volume control system) determines that the operation mode of the air volume control system is the second operation mode, and the exhaust hood is in the second operation mode. The operating modes of the hood according to the application also comprise, by way of example, a second operating mode and a first operating mode.

It should be noted that, in the embodiment of the present application, the working mode of the air volume control system is the same as the working mode of the exhaust cabinet, that is, when the air volume control system is in the first working mode, the exhaust cabinet is in the first working mode; when the air quantity control system is in the second working mode, the exhaust cabinet is in the second working mode; when the working mode of the air volume control system is switched, the working mode of the exhaust cabinet is correspondingly switched, for example, when the air volume control system is switched from the first working mode to the second working mode, the exhaust cabinet is switched from the first working mode to the second working mode.

For example, in the present embodiment, the second operation mode and the first operation mode may be set according to actual requirements, and for example, may be a night mode (second operation mode) and a normal operation mode (first operation mode). Illustratively, referring to fig. 8 in combination with fig. 3a and 3b, when the hood is in night mode, the opening height of the window 70 (as shown in fig. 3 a) of the hood is a set distance H, i.e. the distance of the bottom end of the window 70 from the front bottom side of the working chamber S. The size of the set distance H is not particularly limited, and may be set according to practical situations, for example, when the exhaust hood is in the second working mode in this embodiment, the set distance H is less than or equal to 300 mm.

In some possible embodiments, the hood may be set to night mode, for example when the staff member is far away from the hood, i.e. the hood is in an unattended state. When the exhaust cabinet is in the night mode, the exhaust cabinet is determined to be in the second working mode, namely the air quantity control system is in the second working mode, the air supplementing valve of the air quantity control system is in a closed state, and the air quantity of the air exhausting valve is an air exhausting reference value V in an idle state _{Radix Ginseng Roxburghii} ，V _{Radix Ginseng Roxburghii} =V _{Empty space} +M _{Row of rows} Wherein V is _{Empty space} For setting the idle air quantity, M _{Row of rows} Is the exhaust correction value.

In some possible embodiments, the hood may be set to a normal operation mode, for example when a worker is located in front of the hood for operation. When the exhaust cabinet is in the normal operation mode, the exhaust cabinet is determined to be in the first operation mode, namely the air quantity control system is in the first operation mode, and the exhaust valve and the air supplementing valve of the air quantity control system are both in the operation state.

Step S2: obtaining the second air supplementing quantity V of the air supplementing valve _{Supplement 2} 。

The flow rate detecting device (i.e., a detecting unit 13 described later, as shown in fig. 7) can be used to detect the flow rate of the gas entering the air blowing device, and in this embodiment, the flow rate detecting device is provided upstream of the valve body of the air supply valve or in the valve to detect the air supply amount of the air supply valve. Illustratively, the flow sensing device may be a venturi meter, a pitot tube meter, an orifice plate meter, an impeller meter, or a venturi valve. The present application is not limited to the method of detecting the air supply amount.

Step S3: determining the current second air supplementing quantity V _{Supplement 2} Corresponding second calculated exhaust value V _{Meter 2} 。

The second air supplementing quantity V obtained according to the step S2 _{Supplement 2} To determine the current second air supplementing quantity V _{Supplement 2} Corresponding second calculated exhaust value V _{Meter 2} 。

In some possible embodiments, the second calculated ventilation value V _{Meter 2} =V _{Supplement 2} ÷C÷K _{Tonifying device} Wherein V is _{Supplement 2} Representing the second air supply quantity of the air supply valve at present, that is, the air supply quantity measured from the air supply valve by the present detecting unit 13 (as shown in fig. 7). C represents the air supplementing proportion, namely the corresponding proportion of the air supplementing quantity and the air exhausting quantity. K (K) _{Tonifying device} Represents the correction percentage of the air supply, and theoretically, the air supply proportion C and the second air supply quantity V _{Supplement 2} The current second air supplementing quantity V is calculated _{Supplement 2} Corresponding second calculated exhaust value V _{Meter 2} However, when the air volume control system is applied to a hood, the theoretical value and the actual value deviate due to factors such as opening and closing of a window 70 (shown in fig. 8) of the hood. Therefore, the percentage K is corrected by the supplementary air in the present embodiment _{Tonifying device} For the second calculation of the exhaust value V _{Meter 2} Make corrections to make the second calculated exhaust value V _{Meter 2} Closer to the actual value.

Step S4: the second calculated exhaust value V _{Meter 2} With reference value V of exhaust air _{Radix Ginseng Roxburghii} Comparing; if the second calculation is performed to obtain the exhaust value V _{Meter 2} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve calculates the exhaust value V by a second calculation _{Meter 2} Exhausting if the second calculation of the exhaust value V _{Meter 2} Is less than or equal to the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve uses the exhaust reference value V _{Radix Ginseng Roxburghii} And (5) exhausting air.

Determining the current wind speed V according to the theoretical wind speed set by the wind quantity control system _{Flour with a plurality of grooves} Corresponding reference value V of exhaust air _{Radix Ginseng Roxburghii} And, according to the second calculated exhaust value V obtained in step S3 _{Meter 2} With the above-determined exhaust reference value V _{Radix Ginseng Roxburghii} And (5) performing comparison.

In some of the possible embodiments of the present application,reference value V of exhaust air _{Radix Ginseng Roxburghii} =V _{Empty space} +M _{Row of rows} Wherein V is _{Empty space} Idle air volume set value set for air volume control system, when the air volume control system is applied to the exhaust cabinet, idle air volume set value V of the exhaust cabinet _{Empty space} =volume of exhaust hood inner cavity×ventilation times, M _{Row of rows} Is the exhaust correction value.

The minimum ventilation times in the fume hood were 150 times/hour according to ANSI/AIHA z 9.5-2012. For example, assume that the internal cavity volume of the hood is 1.5m ³ The air exchange times are 220 times/hour, and the set idle air quantity set value V is set _{Empty space} =1.5×220=330cmh。

In other words, when the exhaust cabinet in the embodiment of the present application is in the working mode (i.e., the first working mode or the second working mode), the exhaust valve is in the exhaust state (i.e., the exhaust reference value is greater than 0), and the air supplementing valve is in the air supplementing or closing state.

According to the second calculated exhaust value V obtained in the step S3 _{Meter 2} And the calculated exhaust reference value V _{Radix Ginseng Roxburghii} The comparison unit 15 (as shown in fig. 7) compares the two values, and if the second calculated exhaust value V _{Meter 2} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} I.e. according to the second air supply volume V measured at the current air supply valve _{Supplement 2} The calculated corresponding second calculated exhaust value V _{Meter 2} Greater than according to the current wind speed V _{Flour with a plurality of grooves} The calculated corresponding exhaust reference value V _{Radix Ginseng Roxburghii} When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air supply in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that the larger value of the air quantity control system and the air quantity control system is required to be set as the air quantity of the exhaust valve. That is, if the second calculated exhaust value V _{Meter 2} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve will calculate the exhaust value V with the second calculation _{Meter 2} And (3) exhausting the air by taking the value of the air exhaust quantity as the value of the air exhaust quantity.

If the second calculation is performed to obtain the exhaust value V _{Meter 2} Is smaller than the reference value V of exhaust air _{Radix Ginseng Roxburghii} I.e. according to the second air supply volume V measured at the current air supply valve _{Supplement 2} The calculated corresponding second calculated exhaust value V _{Meter 2} Smaller than according to the front faceWind speed V _{Flour with a plurality of grooves} The calculated corresponding exhaust reference value V _{Radix Ginseng Roxburghii} When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air supply in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that the larger value of the air quantity control system and the air quantity control system is required to be set as the air quantity of the exhaust valve. That is, if the second calculated exhaust value V _{Meter 2} Is smaller than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve will take the reference value V of exhaust _{Radix Ginseng Roxburghii} And (3) exhausting the air by taking the value of the air exhaust quantity as the value of the air exhaust quantity.

Step S5: the air supplementing valve is in a closed state.

When the exhaust cabinet is in the second working mode, namely the air quantity control system is in the second working mode, the air supplementing valve of the air quantity control system is set to be in a closed state, namely the air supplementing quantity is 0. Illustratively, when the supply air volume is 0, the current second supply air volume V obtained in step S2 _{Supplement 2} =0, the second calculated exhaust value V obtained in step S3 _{Meter 2} Also 0, when the air quantity control system is used for being applied to the exhaust cabinet, the air quantity in the exhaust cabinet is always smaller than the air quantity due to the need of ensuring, and the second air quantity V is ensured _{Supplement 2} Is smaller than the reference value V of exhaust air _{Radix Ginseng Roxburghii} 。

Therefore, when the exhaust cabinet is in the second working mode, the air supplementing quantity of the air supplementing valve of the air quantity control system is 0, and the air exhausting quantity of the exhaust valve is an air exhausting reference value V _{Radix Ginseng Roxburghii} . Exemplary, when the fume hood is in the second mode of operation, the fume reference value V _{Radix Ginseng Roxburghii} For the idle air volume setting value, it may be set by the control unit 11 (as shown in fig. 7).

Referring to fig. 2, according to a preset air volume control method when the air volume control system is in the first operation mode, the method includes:

step S6: and determining that the air quantity control system is in a first working mode.

The operation mode of the air volume control system is determined to be the first operation mode by the judging unit 12 (as shown in fig. 7), that is, the exhaust hood is in the first operation mode. Compared with the second working mode, in the first working mode, the exhaust valve and the air supplementing valve of the air quantity control system are in a normal running state.

Step (a)S7: obtain the first air supply volume V of the air supply valve _{Supplement 1} 。

The air supply quantity of the air supply valve is detected by a detection unit 13 (as shown in fig. 7) to determine the first air supply quantity V of the current air supply valve _{Supplement 1} 。

Step S8: determining the current first air supplementing quantity V _{Supplement 1} Corresponding first calculated exhaust value V _{Meter 1} 。

The first air supplementing quantity V obtained according to the step S7 _{Supplement 1} To determine the first air supply volume V _{Supplement 1} Corresponding first calculated exhaust value V _{Meter 1} 。

In some possible embodiments, the first calculated ventilation value V _{Meter 1} =V _{Supplement 1} ÷C÷K _{Tonifying device} Wherein V is _{Supplement 1} The first air supplementing quantity of the air supplementing valve is shown at present, C shows the air supplementing proportion, K _{Tonifying device} Represents the correction percentage of the air supply, and theoretically, the air supply proportion C and the first air supply quantity V _{Supplement 1} The current first air supplementing quantity V is calculated _{Supplement 1} Corresponding first calculated exhaust value V _{Meter 1} However, when the air volume control system is applied to a hood, the theoretical value and the actual value deviate due to factors such as opening and closing of a window 70 (shown in fig. 8) of the hood. Therefore, the percentage K is corrected by the supplementary air in the present embodiment _{Tonifying device} For the first calculation of the exhaust value V _{Meter 1} Make corrections to make the first calculated exhaust value V _{Meter 1} Closer to the actual value.

Step S9: the first calculated exhaust value V _{Meter 1} With reference value V of exhaust air _{Radix Ginseng Roxburghii} Comparing; if the first calculation is to exhaust the air value V _{Meter 1} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve calculates the exhaust value V at first _{Meter 1} Exhausting air; if the first calculation is to exhaust the air value V _{Meter 1} Is less than or equal to the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve uses the exhaust reference value V _{Radix Ginseng Roxburghii} And (5) exhausting air.

Determining the current wind speed V according to the theoretical wind speed set by the wind quantity control system _{Flour with a plurality of grooves} Corresponding reference value V of exhaust air _{Radix Ginseng Roxburghii} And, according to the first calculated exhaust air value V obtained in step S8 _{Meter 1} With the above-determined exhaust reference value V _{Radix Ginseng Roxburghii} And (5) performing comparison.

In some possible embodiments, when the air volume control system is applied to an exhaust hood, the exhaust reference value V _{Radix Ginseng Roxburghii} =（V _{Flour with a plurality of grooves} ×K _{Flour with a plurality of grooves} ）×W×H+M _{Row of rows} Therein, refer to FIG. 8,V _{Flour with a plurality of grooves} Represents the theoretical surface wind speed, K set by the wind quantity control system _{Flour with a plurality of grooves} Represents the face wind speed correction percentage, W represents the width of the window 70, H represents the opening height of the window 70, i.e., the distance between the bottom end of the window 70 and the front bottom side of the working chamber S (as shown in FIG. 8), M _{Row of rows} Indicating the exhaust correction value.

According to the first calculated exhaust value V obtained in step S8 _{Meter 1} And the calculated exhaust reference value V _{Radix Ginseng Roxburghii} The comparison unit 15 (as shown in fig. 7) compares the values of the two, if the first calculated exhaust value V _{Meter 1} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} I.e. according to the first air supply volume V measured at the current air supply valve _{Supplement 1} The calculated corresponding first calculated exhaust value V _{Meter 1} Greater than according to the current wind speed V _{Flour with a plurality of grooves} The calculated corresponding exhaust reference value V _{Radix Ginseng Roxburghii} When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air supply in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that the larger value of the air quantity control system and the air quantity control system is required to be set as the air quantity of the exhaust valve. That is, if the first calculated exhaust value V _{Meter 1} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The air exhaust valve will calculate the air exhaust value V with the first calculation _{Meter 1} And (3) exhausting the air by taking the value of the air exhaust quantity as the value of the air exhaust quantity.

For example, when the exhaust hood is in the first operation mode, if the first calculated exhaust value V _{Meter 1} =110, exhaust reference V _{Radix Ginseng Roxburghii} =100, i.e. if the first calculated ventilation value V _{Meter 1} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve will be at V _{Meter 1} The exhaust was performed as a value of exhaust volume=110.

If the first calculation is to exhaust the air value V _{Meter 1} Is smaller than the reference value V of exhaust air _{Radix Ginseng Roxburghii} I.e. according to the first air supply volume V measured at the current air supply valve _{Supplement 1} The corresponding first meter obtained by calculationCalculate the exhaust value V _{Meter 1} Less than according to the current wind speed V _{Flour with a plurality of grooves} The calculated corresponding exhaust reference value V _{Radix Ginseng Roxburghii} When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air supply in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that the larger value of the air quantity control system and the air quantity control system is required to be set as the air quantity of the exhaust valve. That is, if the first calculated exhaust value V _{Meter 1} Is smaller than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve will take the reference value V of exhaust _{Radix Ginseng Roxburghii} And (3) exhausting the air by taking the value of the air exhaust quantity as the value of the air exhaust quantity.

For example, when the exhaust hood is in the first operation mode, if the first calculated exhaust value V _{Meter 1} =100, exhaust reference V _{Radix Ginseng Roxburghii} =110, i.e. if the first calculated ventilation value V _{Meter 1} Is smaller than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The exhaust valve will be at V _{Radix Ginseng Roxburghii} The exhaust was performed as a value of exhaust volume=110.

Step S10: obtain the exhaust air quantity V of the exhaust valve _{Row of rows} 。

When the exhaust cabinet is in the first working mode, namely the air quantity control system is in the first working mode, the exhaust valve and the air supplementing valve of the air quantity control system are both set to be in a normal running state. At this time, the air discharge amount of the air discharge valve is detected by the detection unit 13 (as shown in fig. 7) to determine the current air discharge amount V of the air discharge valve _{Row of rows} 。

In the application, the exhaust valve and the air supplementing valve of the air quantity control system are pressure independent air valves. Illustratively, the pressure independent dampers may be venturi valves, single-leaf butterfly valves with differential pressure flowmeters, and multi-leaf butterfly valves with differential pressure flowmeters, including venturi flowmeters, pitot tube flowmeters, and orifice plate flowmeters, as well as multi-leaf butterfly valves with impeller flowmeters. In addition, the pressure independent air valve can automatically adjust the flow area to adapt to the change of the front pressure and the back pressure of the valve, and the air quantity flowing through the valve can be controlled to be a preset value in the working pressure difference range.

Step S11: determining the current air discharge volume V _{Row of rows} Corresponding calculation of the wind supplement value V _{Meter 3} 。

Exhaust obtained according to step S10Quantity V _{Row of rows} To determine the air discharge volume V _{Row of rows} Corresponding calculation of the wind supplement value V _{Meter 3} . In some possible embodiments, the air make-up value V is calculated _{Meter 3} =V _{Row of rows} ×C×K _{Tonifying device} The method comprises the steps of carrying out a first treatment on the surface of the Wherein V is _{Row of rows} Represents the current exhaust quantity of the exhaust valve, C represents the air supplementing proportion, K _{Tonifying device} Represents the correction percentage of the air supply, and theoretically, the air supply proportion C and the air discharge quantity V _{Row of rows} The current air discharge V can be calculated _{Row of rows} Corresponding calculation of the wind supplement value V _{Meter 3} However, when the air volume control system is applied to a hood, the theoretical value and the actual value deviate due to factors such as opening and closing of a window 70 (shown in fig. 8) of the hood. Therefore, the percentage K is corrected by the supplementary air in the present embodiment _{Tonifying device} For calculating the air supplementing value V _{Meter 3} Correction is performed to calculate the air supply value V _{Meter 3} Closer to the actual value.

Step S12: will calculate the air supplement value V _{Meter 3} And the air supplementing reference value V _{Radix Ginseng for supplementing} Comparing; if calculate the air supplement value V _{Meter 3} Is greater than or equal to the air supplementing reference value V _{Radix Ginseng for supplementing} The air supplementing valve is used for supplementing air with reference value V _{Radix Ginseng for supplementing} Wind supplementing, if calculate the wind supplementing value V _{Meter 3} Is smaller than the air supplementing reference value V _{Radix Ginseng for supplementing} The air supplementing valve calculates the air supplementing value V _{Meter 3} And (5) supplementing wind.

Determining the current wind speed V according to the theoretical wind speed set by the wind quantity control system _{Flour with a plurality of grooves} Corresponding reference value V of exhaust air _{Radix Ginseng Roxburghii} Then by the exhaust reference value V _{Radix Ginseng Roxburghii} Calculating the air supplementing reference value V _{Radix Ginseng for supplementing} And, according to the calculated air supplement value V obtained in step S11 _{Meter 3} With the above-determined supplementary air reference value V _{Radix Ginseng for supplementing} And (5) performing comparison. In some possible embodiments, the supplemental air reference value V _{Radix Ginseng for supplementing} =V _{Radix Ginseng Roxburghii} ×C×K _{Tonifying device} Wherein C represents the proportion of air supply, K _{Tonifying device} Represents the correction percentage of the supplementary wind, V _{Radix Ginseng Roxburghii} Representing the exhaust reference value of the exhaust valve.

According to the calculated air supplement value V obtained in step S11 _{Meter 3} And the calculated air supply reference value V _{Radix Ginseng for supplementing} The comparison unit 15 (as shown in fig. 7) advances the values of bothComparing the rows, if the wind supplementing value V is calculated _{Meter 3} Is greater than the air supplementing reference value V _{Radix Ginseng for supplementing} I.e. according to the current exhaust volume V measured at the exhaust valve _{Row of rows} The calculated corresponding calculated air supplement value V _{Meter 3} Greater than according to the current wind speed V _{Flour with a plurality of grooves} The calculated corresponding air supplementing reference value V _{Radix Ginseng for supplementing} When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that smaller values of the air quantity control system and the air quantity control system are required to be set as the air quantity of the air supplementing valve. That is, if the air supply value V is calculated _{Meter 3} Is smaller than the air supplementing reference value V _{Radix Ginseng for supplementing} The air compensating valve calculates the air compensating value V _{Meter 3} And (3) taking the value of the air supplementing quantity as the value of the air supplementing quantity to supplement air.

For example, if the air supply value V is calculated when the exhaust hood is in the first operation mode _{Meter 3} =90, air supply reference V _{Radix Ginseng for supplementing} =100, i.e. if the wind supplement value V is calculated _{Meter 3} Is smaller than the air supplementing reference value V _{Radix Ginseng for supplementing} The air supplementing valve is set at V _{Meter 3} The value of the air supply quantity is =90 to perform air supply.

If calculate the air supplement value V _{Meter 3} Is greater than the air supplementing reference value V _{Radix Ginseng for supplementing} I.e. according to the current exhaust volume V measured at the exhaust valve _{Row of rows} The calculated corresponding calculated air supplement value V _{Meter 3} Less than according to the current wind speed V _{Flour with a plurality of grooves} The calculated corresponding air supplementing reference value V _{Radix Ginseng for supplementing} When the air quantity control system is used for being applied to the exhaust cabinet, the air quantity of the air in the exhaust cabinet is required to be ensured to be always smaller than the air quantity, so that smaller values of the air quantity control system and the air quantity control system are required to be set as the air quantity of the air supplementing valve. That is, if the air supply value V is calculated _{Meter 3} Is greater than the air supplementing reference value V _{Radix Ginseng for supplementing} The air supply valve will use the air supply reference value V _{Radix Ginseng for supplementing} And (3) taking the value of the air supplementing quantity as the value of the air supplementing quantity to supplement air.

For example, if the air supply value V is calculated when the exhaust hood is in the first operation mode _{Meter 3} =100, air supply reference V _{Radix Ginseng for supplementing} =90, i.e. if the wind supplement value V is calculated _{Meter 3} Is greater than the air supplementing reference value V _{Radix Ginseng for supplementing} The air supplementing valve is set at V _{Radix Ginseng for supplementing} The value of the air supply quantity is =90 to perform air supply.

Hereinafter, with reference to fig. 3a and 3b, an embodiment of the present application applies an air volume control system to an exhaust hood to illustrate an air volume control method for setting an exhaust volume of an exhaust valve and a supply air volume of a supply air valve, which are performed by the air volume control system, when the exhaust hood is in a first operation mode:

firstly, determining that the exhaust cabinet is in a first working mode, and setting an exhaust valve and an air supplementing valve to be in a normal running state;

according to the height H and width W of the window 70, the reference value V of exhaust air is calculated _{Radix Ginseng Roxburghii} For example, V _{Radix Ginseng Roxburghii} =1000cmh；

According to the proportion of the air supply, for example 60%, the air supply reference value V is calculated _{Radix Ginseng for supplementing} =600cmh；

Obtain the current exhaust valve exhaust volume V _{Row of rows} For example, V _{Row of rows} =970 cmh, the calculated air-supplementing value V corresponding to the current air-exhausting amount is calculated _{Meter 3} =970×60%=582cmh；

Will supplement the wind reference value V _{Radix Ginseng for supplementing} And calculate the air supply value V _{Meter 3} By contrast, calculate the wind supplement value V _{Meter 3} If the value of (2) is smaller, the air supplementing valve is controlled to calculate the air supplementing value V _{Meter 3} Is used for supplementing air quantity and supplementing wind. It should be noted that, as will be understood by those skilled in the art, the reading value of the damper of the exhaust hood (for example, the value of the air compensating valve obtained as described later) and the set value (for example, the above-mentioned air compensating valve to calculate the air compensating value V) _{Meter 3} And the air supply quantity) can have deviation. For example, when the valve readings are within + -5% of the set point, the valve is considered to have reached the air flow value.

Then, the air supplementing quantity of the current air supplementing valve, namely, the first air supplementing quantity V is obtained _{Supplement 1} For example, V _{Supplement 1} The calculated exhaust value corresponding to the current air supply volume is calculated by 610cmh, namely the first calculated exhaust value V _{Meter 1} =610/60%=1017cmh；

Will exhaust reference value V _{Radix Ginseng Roxburghii} With the first calculated exhaust value V _{Meter 1} By contrast, it can be seen that the first calculated exhaust value V _{Meter 1} If the value of (2) is larger, the exhaust valve is controlled to calculate the exhaust value V _{Meter 1} Is arranged in the air exhaust volume.

Therefore, by the air quantity control method provided by the embodiment of the application, the air quantity setting of the air exhaust valve and the air quantity setting of the air supplementing valve are used for exhausting and supplementing the air according to the air supplementing proportion (but not exceeding 60%) which is close to the set air supplementing proportion, so that the problems of high energy consumption of the air exhaust cabinet and turbulent flow organization caused by asynchronous air exhausting and air supplementing actions can be effectively solved, and the purposes of energy conservation and safety are achieved.

After the exhaust air volume setting and the supply air volume setting of the air volume control system are performed, the system further includes:

referring to fig. 4, step S51: the first switching signal is detected, and the air quantity control system is switched from the second working mode to the first working mode. Specifically, a first switching signal input by a worker through an input end is obtained, and then the working mode of the air volume control system is switched from the second working mode to the first working mode. Therefore, when the air quantity control system is used for being applied to the exhaust cabinet, the exhaust cabinet is switched from the second working mode to the first working mode.

Alternatively, referring to fig. 5, step S121: and detecting a second switching signal, and switching the air quantity control system from the first working mode to the second working mode. Specifically, a second switching signal input by a worker through an input end is obtained, and then the working mode of the air volume control system is switched from the first working mode to the second working mode. Therefore, when the air quantity control system is used for being applied to the exhaust cabinet, the exhaust cabinet is switched from the first working mode to the second working mode.

Illustratively, referring to fig. 11 in combination with fig. 7, the input is a touch screen 60, and the touch screen 60 has a first touch area 61 and a second touch area 62. When the worker needs to switch the air volume control system from the second working mode to the first working mode, the first touch control area 61 is activated to output a first switching signal, and when the first switching signal is fed back to the control unit 11, the control unit 11 controls the air volume control system to switch from the second working mode to the first working mode.

When the worker needs to switch the air volume control system from the first working mode to the second working mode, the second touch area 62 is activated to output a second switching signal, and when the second switching signal is fed back to the control unit 11, the control unit 11 controls the air volume control system to switch from the first working mode to the second working mode. With continued reference to fig. 11 and fig. 3a, in some possible embodiments, the air volume control system is applied to the exhaust hood, and when the opening height of the window 70 of the exhaust hood is within the set distance H, the second touch area 62 is pressed for a long time, and the exhaust hood enters the night mode (i.e. the second working mode), the triggering manner of the first switching signal and the second switching signal is not particularly limited, and may be selectively adjusted according to practical situations. Illustratively, the set distance H is 300 millimeters or less.

Referring to fig. 6 and 7, the present invention also provides an air volume control device 10, the air volume control device 10 including:

and the control unit 11, the control unit 11 is suitable for controlling the exhaust air quantity of the exhaust valve of the air quantity control system, the air quantity of the air supplementing valve and switching the working mode. Specifically, the air quantity control of the air exhaust valve and the air supplementing valve can be realized through the pressure-independent air valve, and when the working mode of the air quantity control system needs to be switched, after receiving an instruction for switching the working mode, the air quantity control system is controlled to switch between the first working mode and the second working mode.

And a judging unit 12, wherein the judging unit 12 is suitable for determining the working mode of the air quantity control system. The working modes of the air quantity control system comprise a first working mode and a second working mode. By way of example, with continued reference to fig. 11 in conjunction with fig. 3a, in some possible embodiments, the air volume control system is applied to the hood, and when the hood is in the night mode (i.e., the second mode of operation), the bottom end of the window 70 of the hood is a set distance H from the bottom side of the working chamber, and the set distance H is 300 millimeters or less.

And the detection unit 13, wherein the detection unit 13 is suitable for acquiring the exhaust air quantity of the exhaust valve and the air supplementing quantity of the air supplementing valve. The way of detecting the exhaust air volume and the air supply volume is not limited, and in this embodiment, the detecting unit 13 is a flow rate detecting device.

And a processing unit 14, the processing unit 14 being adapted to determine a calculated exhaust value and a calculated make-up value.

And a comparing unit 15, wherein the comparing unit 15 is adapted to compare the calculated exhaust air value and the exhaust air volume, and to compare the calculated air supplementing value and the air supplementing volume. The connection modes of the control unit 11, the judging unit 12, the detecting unit 13, the processing unit 14, and the comparing unit 15 in the embodiment of the present application are not particularly limited, as long as the embodiment can be used to control the air volume control system by the air volume control device 10. By way of example, it may be an electrical connection or a communication connection.

The control unit 11 is adapted to determine an operation mode of the air volume control system, and correspondingly adjust the current air volume of the air exhaust valve and the current air volume of the air compensation valve according to the air volume of the air exhaust valve, the air volume of the air compensation valve and the comparison result, so that the air volume of the air exhaust valve of the air volume control system is not less than an air exhaust reference value, and the air volume of the air compensation valve of the air exhaust cabinet is not greater than the air compensation reference value.

Specifically, when the air volume control system is in the second working mode, the control unit 11 is adapted to obtain the second air volume V of the current air valve at the detection unit 13 after the judgment unit 12 determines that the air volume control system is in the second working mode _{Supplement 2} Meanwhile, the control processing unit 14 determines the theoretical surface wind speed of the wind quantity control system; and according to the second air supplementing quantity V _{Supplement 2} Determining the current second air supplementing quantity V _{Supplement 2} Corresponding second calculated exhaust value V _{Meter 2} The method comprises the steps of carrying out a first treatment on the surface of the And determining the current face wind speed V according to the theoretical face wind speed _{Flour with a plurality of grooves} Corresponding reference value V of exhaust air _{Radix Ginseng Roxburghii} 。

Specifically, if the second calculated exhaust value V _{Meter 2} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The control unit 11 controls the air discharge valve to calculate the air discharge value V _{Radix Ginseng Roxburghii} Exhausting air; if the second calculation is performed to obtain the exhaust value V _{Meter 2} Is less than or equal to the reference value V of exhaust air _{Radix Ginseng Roxburghii} The control unit 11 controls the air discharge valve to discharge air by the reference value V _{Radix Ginseng Roxburghii} Exhausting air; the control unit 11 controls the air make-up valve to be in a closed state.

When the air volume control system is in the first working mode, the control unit 11 is adapted to obtain the current air volume control system from the detection unit 13 after the judgment unit 12 determines that the air volume control system is in the first working modeFirst air supplementing quantity V of air supplementing valve _{Supplement 1} At the same time, the control processing unit 14 determines the theoretical surface wind speed of the wind volume control system. And according to the first air supplementing quantity V _{Supplement 1} Determining the current first air supplementing quantity V _{Supplement 1} Corresponding first calculated exhaust value V _{Meter 1} The method comprises the steps of carrying out a first treatment on the surface of the And, in determining the current face wind speed V from the theoretical face wind speed _{Flour with a plurality of grooves} Corresponding reference value V of exhaust air _{Radix Ginseng Roxburghii} 。

Specifically, if the first calculated exhaust value V _{Meter 1} Is greater than the reference value V of exhaust air _{Radix Ginseng Roxburghii} The control unit 11 controls the air discharge valve to calculate the air discharge value V at a first time _{Meter 1} Exhausting air; if the first calculation is to exhaust the air value V _{Meter 1} Is less than or equal to the reference value V of exhaust air _{Radix Ginseng Roxburghii} The control unit 11 controls the air discharge valve to discharge air by the reference value V _{Radix Ginseng Roxburghii} And (5) exhausting air.

When the air volume control system is in the first working mode, the control unit 11 is adapted to obtain the current air volume V of the air exhaust valve at the detection unit 13 after the judgment unit 12 determines that the air volume control system is in the first working mode _{Row of rows} Meanwhile, the control processing unit 14 determines the theoretical surface wind speed of the wind quantity control system; and determining the current air discharge volume V according to the air discharge volume _{Row of rows} Corresponding calculation of the wind supplement value V _{Meter 3} The method comprises the steps of carrying out a first treatment on the surface of the And, in determining the current face wind speed V from the theoretical face wind speed _{Flour with a plurality of grooves} Corresponding reference value V of exhaust air _{Radix Ginseng Roxburghii} At the same time as determining the current exhaust reference value V _{Radix Ginseng Roxburghii} Corresponding air supplementing reference value V _{Radix Ginseng for supplementing} 。

Specifically, if the air supply value V is calculated _{Meter 3} Is greater than or equal to the air supplementing reference value V _{Radix Ginseng for supplementing} The control unit controls the air supplementing valve to supplement air with the reference value V _{Radix Ginseng for supplementing} Wind supplementing; if calculate the air supplement value V _{Meter 3} Is smaller than the air supplementing reference value V _{Radix Ginseng for supplementing} The control unit controls the air supplementing valve to calculate the air supplementing value V _{Meter 3} And (5) supplementing wind.

Referring to fig. 6 and 7 in combination with fig. 8, an air volume control system according to an embodiment of the present application includes the air volume control device 10 according to any of the above embodiments.

In addition, the air volume control device 10 further includes an exhaust manifold 20, an air supply manifold 30, a PLC (Programmable Logic Controller ) 40, and a displacement sensor 50, a touch screen 60, an emergency switch 80, an infrared correlation module (not shown in the figure), and an infrared human body detection module (not shown in the figure). An exhaust valve 21 is arranged on the exhaust path of the exhaust main pipe 20, and the exhaust amount of the exhaust main pipe 20 can be measured and adjusted through the exhaust valve 21. The air supply valve 31 is arranged on the air supply path of the air supply main pipe 30, and the air supply quantity of the air supply main pipe 30 can be measured and adjusted through the air supply valve 31.

It should be noted that, in the embodiment of the present application, the connection modes among the exhaust manifold 20, the air supply manifold 30, the PLC40, the displacement sensor 50, the touch screen 60, the emergency switch 80, the infrared correlation module and the infrared human body detection module in the air volume control device 10 of the air volume control system are not particularly limited, so long as the connection modes can be used for realizing the control of exhaust air and air supply of the air volume control system. For example, the air discharge valve 21 may be electrically connected to the air volume control device 10, or may be in communication with the air volume control device 10, and the PLC40 may be in communication with the air volume control device 10.

In some possible embodiments, when the air volume control system is applied to an exhaust cabinet, reference is continued to fig. 6 and 7, where the exhaust valve 21 is used to detect a current exhaust air value in the exhaust cabinet, and the air supplement valve 31 is used to detect a current air supplement value in the exhaust cabinet and feed back to the detection unit 13 of the air volume control device 10, the detection unit 13 feeds back the current exhaust air value and the air supplement value to the processing unit 14, the processing unit 14 calculates and determines the current calculated exhaust air value and the calculated air supplement value, and then feeds back the calculation result to the comparing unit 15, and the comparing unit 15 compares the current calculated exhaust air value in the exhaust cabinet with a preset reference value of exhaust air in the exhaust cabinet, and compares the current calculated air supplement value in the exhaust cabinet with the preset reference value of air supplement in the exhaust cabinet and feeds back the comparison result to the control unit 11. The control unit 11 adjusts the exhaust air quantity of the exhaust valve 21 and the air supplementing quantity of the air supplementing valve 31 according to the comparison result, and realizes the overall variable air quantity control of the exhaust cabinet.

In addition, referring to fig. 8, when the air volume control system is applied to the exhaust hood, the displacement sensor 50 is disposed at the top of the exhaust hood, for providing the door height information of the window 70 of the exhaust hood, the touch screen 60 is disposed outside the exhaust hood, for collecting and displaying information, and some parameters are set, such as setting the theoretical surface air speed of the air volume control system and setting the working mode of the air volume control system (i.e. the working mode of the exhaust hood). The emergency switch 80 is disposed on the upright of the exhaust cabinet, and the infrared human body detection module (not shown in the figure) is used for providing infrared human body information, and the infrared correlation module (not shown in the figure) is used for providing whether there is a person or object information in the middle of the sliding door of the window 70, so that the anti-pinch function is provided.

Specifically, referring to fig. 6 and 7, the control unit 11 will feed back the comparison result to the PLC40, and the PLC40 will perform corresponding operations according to the comparison result. For example, if the calculated exhaust air value is greater than the exhaust air reference value, the fan blade opening and closing controller 41 of the exhaust valve controls the fan blade opening and closing angle of the exhaust valve 21 to adjust the air quantity so as to calculate the exhaust air value for exhaust air; if the calculated exhaust air value is less than or equal to the exhaust air reference value, the fan blade opening and closing controller 41 controls the fan blade opening and closing angle of the exhaust valve 21 to adjust the air quantity so as to exhaust air by the exhaust air reference value. For another example, if the calculated air supply value is greater than or equal to the air supply reference value, the air quantity is adjusted by controlling the blade opening and closing angle of the air supply valve 31 through the air supply valve blade opening and closing controller 42 so as to supply air with the air supply reference value; if the calculated air supply value is smaller than the air supply reference value, the air quantity is regulated by controlling the blade opening and closing angle of the air supply valve 31 through the air supply valve blade opening and closing controller 42 so as to calculate the air supply value and air supply. This can improve ventilation efficiency and save energy.

The number of the exhaust valve 21 and the air compensating valve 31 in the air volume control system is not limited in the embodiment of the present application, wherein the exhaust valve 21 is used for measuring and adjusting the exhaust air volume, and the air compensating valve 31 is used for measuring and adjusting the air compensating volume. Illustratively, the vent valve 21 and the make-up valve 31 in the present application are both pressure independent air valves.

When the air quantity control system is applied to the exhaust cabinet, the exhaust quantity of the exhaust cabinet is measured through the exhaust valve 21, the air supplementing quantity of the exhaust cabinet is measured through the air supplementing valve 31, and according to feedback of the detection unit 13 in the air quantity control device 10, the exhaust quantity is adjusted through the exhaust valve 21, the air supplementing quantity is adjusted through the air supplementing valve 31, and adjustment of the variable air quantity in the exhaust cabinet is achieved.

In addition, the application also provides a computer storage medium, which comprises a memory and a processor, wherein the memory is suitable for storing computer instructions, and the processor is suitable for executing the air volume control method according to any embodiment when the computer instructions are executed.

Referring now to fig. 9, shown is a block diagram of an electronic device 600 in accordance with one embodiment of the present application. The electronic device 600 is, for example, the above-described air volume control system. The electronic device 600 may include one or more processors 601 coupled to a controller hub 603. For at least one embodiment, the controller hub 603 communicates with the processor 601 via a multi-drop Bus, such as a Front Side Bus (FSB), a point-to-point interface, such as a Quick Path Interconnect (QPI), or similar connecting network interface 606. The processor 601 executes instructions that control general types of data processing operations. In one embodiment, controller Hub 603 includes, but is not limited to, a Graphics Memory Controller Hub (GMCH) (not shown) and an Input Output Hub (IOH) (which may be on separate chips) (not shown), where the GMCH includes memory and Graphics controllers and is coupled to the IOH.

The electronic device 600 may also include a coprocessor 602 and memory 604 coupled to the controller hub 603. Alternatively, one or both of the memory and GMCH may be integrated within the processor (as described in the present application), with the memory 604 and co-processor 602 coupled directly to the processor 601 and the controller hub 603, the controller hub 603 being in a single chip with the IOH.

The memory 604 may be, for example, dynamic random access memory (DRAM, dynamic Random Access Memory), phase change memory (PCM, phase Change Memory), or a combination of both. Memory 604 may include one or more tangible, non-transitory computer-readable media for storing data and/or instructions. The computer-readable storage medium has stored therein instructions, and in particular, temporary and permanent copies of the instructions. The instructions may include: instructions that when executed by at least one of the processors cause the electronic device 600 to implement the air volume control method shown in fig. 1-2, 4-5. When the instructions are run on the computer, the instructions cause the computer to execute the method disclosed in any one or combination of the above embodiments to control the real-time air volume of the air discharge valve and the air supply valve.

In one embodiment, coprocessor 602 is a special-purpose processor, such as, for example, a high-throughput MIC (Many Integrated Core, integrated many-core) processor, network or communication processor, compression engine, graphics processor, GPGPU (General-purpose computing on a graphics processing unit), embedded processor, or the like. Optional properties of the co-processor 602 are shown in fig. 9 with dashed lines.

In one embodiment, the electronic device 600 may further include a network interface (NIC, network Interface Controller) 606. The network interface 606 may include a transceiver to provide a radio interface for the electronic device 600 to communicate with any other suitable device (e.g., front end module, antenna, etc.). In various embodiments, the network interface 606 may be integrated with other components of the electronic device 600. The network interface 606 may implement the functions of the communication units in the above-described embodiments.

The electronic device 600 may further include an Input/Output (I/O) device 605.I/O605 may include: a user interface, the design enabling a user to interact with the electronic device 600; the design of the peripheral component interface enables the peripheral component to also interact with the electronic device 600; and/or sensors designed to determine environmental conditions and/or location information associated with the electronic device 600.

It is noted that fig. 9 is merely exemplary. That is, although fig. 9 shows that the electronic apparatus 600 includes a plurality of devices such as a processor 601, a controller hub 603, and a memory 604, in practical applications, an apparatus using the methods of the present application may include only a part of the devices of the electronic apparatus 600, for example, may include only the processor 601 and the network interface 606. The nature of the alternative device is shown in dashed lines in fig. 9.

Referring now to fig. 10, shown is a block diagram of a SoC (System on Chip) 700 in accordance with an embodiment of the present application. In fig. 10, similar components have the same reference numerals. In addition, the dashed box is an optional feature of a more advanced SoC. In fig. 10, the SoC includes: an interconnect unit 750 coupled to the processor 710; a system agent unit 780; a bus controller unit 790; an integrated memory controller unit 740; a set or one or more coprocessors 720 which may include integrated graphics logic, an image processor, an audio processor, and a video processor; a Static Random-Access Memory (SRAM) unit 730; a direct memory access (DMA, direct Memory Access) unit 760. In one embodiment, coprocessor 720 includes a special-purpose processor, such as, for example, a network or communication processor, compression engine, GPGPU (General-purpose computing on graphics processing units, general purpose computing on a graphics processing unit), high-throughput MIC processor, embedded processor, or the like.

Static Random Access Memory (SRAM) unit 730 may include one or more tangible, non-transitory computer-readable media for storing data and/or instructions. The computer-readable storage medium has stored therein instructions, and in particular, temporary and permanent copies of the instructions. The instructions may include: instructions that, when executed by at least one of the processors, cause the SoC to implement the air volume control method shown in fig. 1. The instructions, when executed on a computer, cause the computer to perform the methods disclosed in the above embodiments.

The method embodiments of the application can be realized in the modes of software, magnetic elements, firmware and the like.

Program code may be applied to input instructions to perform the functions described herein and generate output information. The output information may be applied to one or more output devices in a known manner. For the purposes of this application, a processing system includes any system having a processor such as, for example, a digital signal processor (DSP, digital Signal Processor), a microcontroller, an Application Specific Integrated Circuit (ASIC), or a microprocessor.

The program code may be implemented in a high level procedural or object oriented programming language to communicate with a processing system. Program code may also be implemented in assembly or machine language, if desired. Indeed, the mechanisms described herein are not limited in scope to any particular programming language. In either case, the language may be a compiled or interpreted language.

One or more aspects of at least one embodiment may be implemented by representative instructions stored on a computer readable storage medium, which represent various logic in a processor, which when read by a machine, cause the machine to fabricate logic to perform the techniques herein. These representations, referred to as "IP (Intellectual Property ) cores," may be stored on a tangible computer-readable storage medium and provided to a plurality of customers or production facilities for loading into the manufacturing machines that actually manufacture the logic or processor.

In some cases, an instruction converter may be used to convert instructions from a source instruction set to a target instruction set. For example, the instruction converter may transform (e.g., using a static binary transform, a dynamic binary transform including dynamic compilation), morph, emulate, or otherwise convert an instruction into one or more other instructions to be processed by the core. The instruction converter may be implemented in software, hardware, firmware, or a combination thereof. The instruction converter may be on-processor, off-processor, or partially on-processor and partially off-processor.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present invention.

Claims

1. The air quantity control method is applied to an air quantity control system, and the air quantity control system comprises an exhaust valve and an air supplementing valve; the method is characterized by comprising the following steps:

determining that the air quantity control system is in a first working mode;

acquiring the exhaust quantity of the exhaust valve;

determining a calculated air supplementing value corresponding to the current air exhausting quantity;

comparing the calculated air supplementing value with an air supplementing reference value;

if the calculated air supplementing value is greater than or equal to the air supplementing reference value, the air supplementing valve supplements air by the air supplementing reference value;

if the calculated air supplementing value is smaller than the air supplementing reference value, the air supplementing valve supplements air by the calculated air supplementing value;

acquiring a first air supplementing quantity of the air supplementing valve;

determining a first calculated exhaust value corresponding to the current first air supplementing quantity;

comparing the first calculated exhaust air value with an exhaust air reference value;

if the first calculated exhaust value is larger than the exhaust reference value, the exhaust valve exhausts air by the first calculated exhaust value;

and if the first calculated exhaust value is smaller than or equal to the exhaust reference value, the exhaust valve exhausts air by the exhaust reference value.

2. The air volume control method according to claim 1, characterized in that the air volume control method further comprises:

Determining that the air quantity control system is in a second working mode;

acquiring a second air supplementing quantity of the air supplementing valve;

determining a second calculated exhaust value corresponding to the current second air supplementing quantity;

comparing the second calculated exhaust air value with an exhaust air reference value;

if the second calculated exhaust value is larger than the exhaust reference value, the exhaust valve exhausts air by the second calculated exhaust value;

if the second calculated exhaust value is smaller than or equal to an exhaust reference value, the exhaust valve exhausts air by the exhaust reference value;

the air supplementing valve is in a closed state.

3. The air volume control method of claim 1, wherein the air volume control system is configured to be applied to an exhaust hood, the exhaust hood including a window, the comparing the first calculated exhaust air value with an exhaust air reference value comprising:

determining the theoretical surface wind speed of the wind quantity control system;

the first calculated exhaust value is V _{Meter 1} ，V _{Meter 1} =V _{Supplement 1} ÷C÷K _{Tonifying device} Wherein V is _{Supplement 1} The first air supplementing quantity of the air supplementing valve is shown at present, C shows the air supplementing proportion, K _{Tonifying device} Representing the correction percentage of the air supply;

the exhaust reference value is V _{Radix Ginseng Roxburghii} ，V _{Radix Ginseng Roxburghii} =（V _{Flour with a plurality of grooves} ×K _{Flour with a plurality of grooves} ）×W×H+M _{Row of rows} Wherein V is _{Flour with a plurality of grooves} Represents the theoretical surface wind speed, K set by the wind quantity control system _{Flour with a plurality of grooves} Represents the correction percentage of the wind speed of the surface, W represents the width of the window, H represents the height of the window opening, M _{Row of rows} Indicating the exhaust correction value.

4. The air volume control method according to claim 2, wherein the comparing the second calculated air discharge value with an air discharge reference value includes:

determining an idle air volume set value of the air volume control system;

the second calculated exhaust value is V _{Meter 2} ，V _{Meter 2} =V _{Supplement 2} ÷C÷K _{Tonifying device} Wherein V is _{Supplement 2} The second air supplementing quantity of the air supplementing valve is shown at present, C shows the air supplementing proportion, K _{Tonifying device} Representing the correction percentage of the air supply;

the exhaust reference value is V _{Radix Ginseng Roxburghii} ，V _{Radix Ginseng Roxburghii} =V _{Empty space} +M _{Row of rows} Wherein V is _{Empty space} Indicating the idle air volume set value set by the air volume control system, M _{Row of rows} Indicating the exhaust correction value.

5. The air volume control method according to claim 1, wherein comparing the calculated air supply value with an air supply reference value includes:

the calculated air supplementing value is V _{Meter 3} ，V _{Meter 3} =V _{Row of rows} ×C×K _{Tonifying device} Wherein V is _{Row of rows} Represents the current exhaust quantity of the exhaust valve, C represents the air supplementing proportion, K _{Tonifying device} Representing the correction percentage of the air supply;

the reference value of the air supplement is V _{Radix Ginseng for supplementing} ，V _{Radix Ginseng for supplementing} =V _{Radix Ginseng Roxburghii} ×C×K _{Tonifying device} Wherein V is _{Radix Ginseng Roxburghii} Representing the exhaust reference value of the exhaust valve.

6. The air volume control method of claim 1, wherein the air volume control system is configured to be applied to an exhaust hood, and wherein determining that the air volume control system is in the first operation mode comprises: and detecting a first switching signal, wherein the air quantity control system is switched from a second working mode to the first working mode, and is used for enabling the exhaust cabinet to be switched from the second working mode to the first working mode.

7. The air volume control method according to claim 2, wherein the air volume control system is configured to be applied to an exhaust hood, and wherein determining that the air volume control system is in the second operation mode includes: and detecting a second switching signal, wherein the air quantity control system is switched from the first working mode to the second working mode, and is used for enabling the exhaust cabinet to be switched from the first working mode to the second working mode.

8. The air volume control method according to claim 6, wherein the detecting the first switching signal includes: the method comprises the steps of acquiring a first switching signal input by a worker through an input end.

9. The air volume control method according to claim 7, wherein the detecting of the second switching signal includes: and acquiring a second switching signal input by the staff through the input end.

10. The air volume control method according to claim 8 or 9, wherein the input end is a touch screen, the touch screen has a first touch area and a second touch area, the first touch area is activated to output a first switching signal, and the second touch area is activated to output a second switching signal.

11. The method according to claim 7, wherein when the hood is in the second operation mode, the height of the window opening of the hood is a set distance, and the set distance is H, where H is 300 mm or less.

12. The exhaust cabinet is characterized by comprising an air quantity control system, wherein the air quantity control system comprises an exhaust valve and an air supplementing valve, and the air quantity control system is respectively connected with the exhaust valve and the air supplementing valve; wherein the air volume control system is configured to perform the air volume control method according to any one of claims 1 to 11.

13. The exhaust hood according to claim 12, wherein the exhaust valve is a pressure independent air valve.

14. The exhaust hood according to claim 12, wherein the air make-up valve is a pressure independent air valve.

15. A computer storage medium comprising a memory adapted to store computer instructions and a processor adapted to perform the air volume control method of any one of claims 1 to 11 when the computer instructions are executed.