A control method and system of a combined ventilation and air conditioning unit and a storage medium

Abstract

This invention relates to the field of building energy conservation, specifically to a control method, system, and storage medium for a combined emergency and emergency ventilation and air conditioning unit. The control method includes setting a set air volume delivered into the room from the unit's air outlet and setting a target particulate matter concentration. C 0; Real-time detection of particulate matter concentration C 1. C 2; if C 1≤ C 0. Close the first and second air valves completely, and open the third and fourth air valves completely; if C 1> C 0. With the goal of minimizing the total resistance of airflow through the bypass duct and the deep filter duct, solve for the optimal combination of damper openings and adjust the damper openings to the optimal level; monitor the current airflow volume in real time and adjust the fan speed to the target speed; if C 2≤ C 0. Maintain the current valve opening; otherwise, repeat the steps until... C 2≤ C 0. Achieving precise and stable airflow output not only ensures that indoor air quality accurately meets control requirements, but also significantly reduces the energy consumption of the ventilation and air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of building energy conservation, and in particular to a control method, system and storage medium for a combined emergency and emergency ventilation and air conditioning unit. Background Technology

[0002] With increasing public awareness of health, combined normal and emergency ventilation and air conditioning units (VAC units) in building structures have gained widespread use due to their ability to flexibly switch between normal operating conditions and emergency conditions that respond to drastic changes in outdoor particulate matter concentration, ensuring both indoor air quality and energy efficiency. However, existing technologies generally rely on independent adjustments of fan speed and damper opening during the transition between normal and emergency conditions, lacking dynamic coordination. This often leads to drastic fluctuations in airflow and abnormally high system resistance. This not only reduces air handling precision but also causes the fan to deviate from its high-efficiency operating range for extended periods, resulting in significant energy loss due to unnecessary throttling resistance and triggering frequent compensation adjustments in the subsequent temperature and humidity control chain, leading to a significant increase in overall system energy consumption. Therefore, there is an urgent need for a technical solution that can achieve precise coordinated control of dampers and fans, ensuring rapid and stable switching between operating conditions while effectively reducing system energy consumption. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a control method, system and storage medium for a combined emergency and emergency ventilation and air conditioning unit.

[0004] In a first aspect, the present invention provides a control method for a combined emergency and emergency ventilation and air conditioning unit, comprising the following steps:

[0005] S1: Set the set air volume supplied to the room from the unit's air outlet. Q set Set particulate matter concentration control targets C 0;

[0006] A first air valve, a high-efficiency filter, and a second air valve are positioned between a first particulate matter concentration sensor and a second particulate matter concentration sensor. The first air valve, the high-efficiency filter, and the second air valve form a deep filtration air duct. The airflow through the first air valve, the high-efficiency filter, and the second air valve in the deep filtration air duct is... Q 2. Configure the first air valve and the second air valve for interlocking control;

[0007] A third and fourth air valve are positioned between the first and second particulate matter concentration sensors, forming a bypass ventilation duct. The airflow through the third and fourth air valves in the bypass ventilation duct is... Q 1. The third air valve and the fourth air valve are configured for interlocking control;

[0008] The particulate matter concentration at the fan outlet is monitored in real time using a first particulate matter concentration sensor. C 1. The particulate matter concentration at the air inlet of the heating / cooling coil is detected in real time by a second particulate matter concentration sensor. C 2. Real-time detection of current air volume via flow meter. Q 0, ;

[0009] S2: If C 1≤ C 0, adjust the opening degree of the first air valve and the second air valve. Fully closed, reducing the opening degree of the third air valve (11) and the fourth air valve. Fully open, then Q 1= Q 0, Q 2 = 0;

[0010] like C 1> C 0, the total resistance of airflow through the bypass duct and the deep filter duct. P total With the objective of minimizing the value, the optimal damper opening is solved using a numerical iteration method. and Combination, and optimal airflow Q 1 and Q Combine 2, and adjust the damper opening to the optimal damper opening;

[0011] Objective function: ;

[0012] Constraints: ;0≤ ≤100%, 0≤ ≤100%; | P 1- P 2|≤0.1;

[0013] In the formula: P 1 represents the pressure loss of air flowing through the bypass ventilation duct. P 2 represents the pressure loss of airflow through the depth filter duct;

[0014] S3: Standby unit running time Δ t When the preset value is reached, the current air volume is detected in real time by the flow meter. Q 0, ,like , If the threshold is met, the fan will maintain its current speed; otherwise, it will operate according to... Calculate the target speed of the fan N ob , N 0 represents the current speed of the fan.k To control the parameters, adjust the fan speed to the target speed. N ob until satisfied ;

[0015] S4: At the current air supply volume Q Under 0 operation, the second particulate matter concentration sensor detects the particulate matter concentration in real time. C 2. The set particulate matter concentration control target is C Compare with 0, if C 2≤ C If the value is 0, maintain the current valve opening; otherwise, repeat steps S2-S3 until... C 2≤ C 0.

[0016] Preferably, the particulate matter concentration balance equation is:

[0017]

[0018] In the formula: or The filtration efficiency of a high-efficiency filter.

[0019] Preferably, the pressure loss of air flowing through the bypass duct P Pressure loss in 1 and deep filtration ducts P 2. Calculate according to the following formula:

[0020]

[0021]

[0022] In the formula: l 1 represents the friction factor of the bypass ventilation duct. l 2 represents the friction factor of the deep filtration duct. x 1 represents the local resistance coefficient of the third and fourth air valves. x 2 represents the local resistance coefficient of the first and second air valves. L 1 represents the length of the bypass ventilation duct. L 2 represents the length of the depth filtration duct. D 1 represents the hydraulic diameter of the bypass ventilation duct. D 2 represents the hydraulic diameter of the deep filtration duct. A 1 represents the cross-sectional area of ​​the bypass ventilation duct. A 2 represents the cross-sectional area of ​​the deep filtration duct. A 3 represents the effective filtration area of ​​the high-efficiency filter. r air density, g and m The experimental coefficient is denoted as .

[0023] Preferably, the local resistance coefficient is related to the valve opening degree:

[0024]

[0025] .

[0026] Preferably,

[0027] ;

[0028] ;

[0029] In the formula: It is a non-zero number.

[0030] Preferably, k The value ranges from 0.1 to 2.

[0031] Preferably, the numerical iteration method includes gradient descent and bisection methods.

[0032] Preferably, The value range is 1%-3%.

[0033] In a second aspect, the present invention provides a control system for a combined emergency and emergency ventilation air conditioning unit, employing any of the aforementioned control methods for a combined emergency and emergency ventilation air conditioning unit.

[0034] In a third aspect, the present invention provides a computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform any of the above-described methods for controlling a combined emergency and emergency ventilation and air conditioning unit.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] The control method and system provided by this invention introduces real-time particulate matter concentration detection and closed-loop feedback mechanism, with the goal of minimizing the total system resistance, and dynamically and collaboratively adjusts the opening of the air valve and the air volume distribution. This not only ensures that the indoor air quality accurately meets the control requirements, but also significantly reduces the operating energy consumption of the ventilation and air conditioning system.

[0037] Meanwhile, by using a linkage control strategy between the fan speed and the air valve, the system achieves accurate and stable air volume output, effectively avoiding air volume fluctuations caused by operating condition switching or external interference, and improving the system's dynamic response quality and long-term operational reliability. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a combined emergency and emergency ventilation and air conditioning unit according to the present invention.

[0039] Figure 2This is a flowchart illustrating a control method for a combined emergency and emergency ventilation and air conditioning unit according to the present invention.

[0040] Marked in the image:

[0041] 1-Fresh air inlet, 2-Return air inlet, 3-Pre-filter, 4-Medium-efficiency filter, 5-Fan, 6-First particulate matter concentration sensor, 7-First air valve, 8-High-efficiency filter, 9-Second air valve, 10-Second particulate matter concentration sensor, 11-Third air valve, 12-Fourth air valve, 13-Heating / cooling coil, 14-Air supply outlet, 15-Flow meter. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0043] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0044] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0045] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0046] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0047] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0048] Example 1

[0049] like Figure 1As shown, a combined emergency and emergency ventilation and air conditioning unit includes a fresh air inlet 1, a return air inlet 2, a primary filter 3, a medium-efficiency filter 4, a fan 5, a first particulate matter concentration sensor 6, a first air valve 7, a high-efficiency filter 8, a second air valve 9, a second particulate matter concentration sensor 10, a third air valve 11, a fourth air valve 12, a heating / cooling coil 13, an air supply outlet 14, a flow meter 15, etc.

[0050] The first particulate matter concentration sensor 6 is used to detect the particulate matter concentration at the outlet of the fan 5 in real time. C 1. The second particulate matter concentration sensor 10 is used to detect the particulate matter concentration at the air inlet of the heating / cooling coil 13 in real time. C 2.

[0051] The first air valve 7, the high-efficiency filter 8, and the second air valve 9 are positioned between the first particulate matter concentration sensor 6 and the second particulate matter concentration sensor 10. These components form a deep filtration duct. The airflow through this deep filtration duct is... Q 2. Set the first air valve 7 and the second air valve 9 for interlocking control. The opening degree of the first air valve 7 and the second air valve 9 is: .

[0052] The third air valve 11 and the fourth air valve 12 are positioned between the first particulate matter concentration sensor 6 and the second particulate matter concentration sensor 10. The third air valve 11 and the fourth air valve 12 form a bypass ventilation duct, and the airflow through the third air valve 11 and the fourth air valve 12 in the bypass ventilation duct is... Q 1. Configure the third air valve 11 and the fourth air valve 12 for interlocking control. The opening degree of the third air valve 11 and the fourth air valve 12 is: .

[0053] The control principle of the combined emergency and emergency ventilation and air conditioning unit is as follows:

[0054] Normal operating conditions: When the first particulate matter concentration sensor 6 detects the particulate matter concentration at the air outlet of fan 5... C 1 is less than the set particulate matter concentration control target C At 0 o'clock, the first air valve 7 and the second air valve 9 of the deep filtration air duct are fully closed, and the third air valve 11 and the fourth air valve 12 of the bypass air duct are fully open. Outdoor air enters the unit from the fresh air inlet 1, mixes with the air entering the unit from the return air inlet 2, and is then filtered by the pre-filter 3 and the medium-efficiency filter 4. After being heated or cooled by the fan 5 through the third air valve 11 and the fourth air valve 12, the air is then sent into the building interior through the air outlet 14.

[0055] Emergency Operation: When the first particulate matter concentration sensor 6 detects the particulate matter concentration at the outlet of fan 5... C 1 is greater than or equal to the particulate matter concentration control target.C At 0, the particulate matter concentration at the air inlet of the heating / cooling coil 13 is detected by the second particulate matter concentration sensor 10. C 2. Particulate matter concentration control target C Adjust the openings of the first air valve 7, second air valve 9, third air valve 11, and fourth air valve 12 to appropriate levels. Outdoor air enters the unit through the fresh air inlet 1, mixes with the air entering the unit through the return air inlet 2, and is then filtered by the pre-filter 3 and the medium-efficiency filter 4. After passing through the fan 5, the first part of the air passes through the third air valve 11 and the fourth air valve 12 in the bypass duct, while the second part of the air passes through the first air valve 7, the high-efficiency filter 8, and the second air valve 9 in the deep filtration duct. After mixing with the first part of the air, it is heated or cooled by the heating / cooling coil 13 and then delivered as clean air into the building through the air outlet 14.

[0056] like Figure 2 As shown, a control method for a combined emergency and emergency ventilation and air conditioning unit includes the following steps:

[0057] S1: Set the set air volume supplied to the room from the unit's air outlet 14. Q set Set particulate matter concentration control targets C 0;

[0058] The particulate matter concentration at the outlet of the fan 5 is detected in real time by the first particulate matter concentration sensor 6. C 1. The particulate matter concentration at the air inlet of the heating / cooling coil 13 is detected in real time by the second particulate matter concentration sensor 10. C 2. The current air volume is detected in real time by the flow meter 15. Q 0, ;

[0059] S2: If C 1≤ C 0, adjust the opening degree of the first air valve 7 and the second air valve 9. Fully closed, reducing the opening of the third air valve 11 and the fourth air valve 12. Fully open, then =1, Q 1= Q 0, =0, Q 2 = 0;

[0060] like C 1> C 0, the total resistance of airflow through the bypass duct and the deep filter duct. P total With the objective of minimizing the value, the optimal damper opening is solved using a numerical iteration method. and Combination, and optimal airflowQ 1 and Q Combine 2, and adjust the damper opening to the optimal damper opening.

[0061] In one or more embodiments:

[0062] Current air volume supplied to the room from air outlet 14 of the unit Q 0 can be calculated using the following formula:

[0063]

[0064] In the formula: Q 1 represents the airflow through the third air valve 11 and the fourth air valve 12 in the bypass ventilation duct; Q 2 represents the airflow through the first air valve 7, the high-efficiency filter 8, and the second air valve 9 in the deep filtration duct.

[0065] The particulate matter concentration balance equation is:

[0066]

[0067] In the formula: or The filtration efficiency of the high-efficiency filter 8.

[0068] Pressure loss of air flowing through the bypass duct P Pressure loss in 1 and deep filtration ducts P 2. Calculate according to the following formula:

[0069]

[0070]

[0071] In the formula: l 1 represents the friction factor of the bypass ventilation duct. l 2 represents the friction factor of the deep filtration duct. x 1 represents the local resistance coefficient of the third air valve 11 and the fourth air valve 12. x 2 represents the local resistance coefficient of the first air valve 7 and the second air valve 9. L 1 represents the length of the bypass ventilation duct. L 2 represents the length of the depth filtration duct. D 1 represents the hydraulic diameter of the bypass ventilation duct. D 2 represents the hydraulic diameter of the deep filtration duct. A 1 represents the cross-sectional area of ​​the bypass ventilation duct. A 2 represents the cross-sectional area of ​​the depth filtration duct. A 3 represents the effective filtration area of ​​the HEPA filter 8. r air density, g and m The experimental coefficient is denoted as .

[0072] For a combined emergency and emergency ventilation air conditioning unit, the dampers are already determined, and their local resistance coefficient is related to the damper opening degree:

[0073]

[0074] .

[0075] Preferably,

[0076] ;

[0077] ;

[0078] In the formula: For non-zero numbers, The possible value is 0.0001.

[0079] The total resistance of airflow through the bypass duct and the deep filter duct P total Calculate the corresponding airflow rate in the duct with the goal of minimizing it. Q 1 and Q 2. Adjust the opening of the air valve. and :

[0080] Objective function: ;

[0081] Constraints:

[0082] ;

[0083] 0≤ ≤100%, 0≤ ≤100%;

[0084] |P1-P2|≤0.1.

[0085] S3: Adjusting the damper opening will change the resistance characteristics of the ventilation and air conditioning system, and the standby unit running time Δ t When the preset value is reached, the current air volume is detected in real time by the flow meter 15. Q 0, if , If the threshold is met, then fan 5 will maintain its current speed; otherwise, it will operate according to... Calculate the target speed of fan 5 N ob , N 0 represents the current speed of the fan. k To control the parameters, adjust the speed of fan 5 to the target speed. N ob until satisfied .

[0086] Preferably, k The value ranges from 0.1 to 2. Preferably, The value range is 1%-3%.

[0087] S4: At the current air supply volume Q Under 0 operation, the second particulate matter concentration sensor 10 detects the particulate matter concentration in real time. C 2. The set particulate matter concentration control target is C Compare with 0, if C 2≤ C If the value is 0, maintain the current valve opening; otherwise, repeat steps S2-S3 until... C 2≤ C 0.

[0088] Example 2

[0089] Based on Example 1, this example provides a specific application example with a target air volume. Q set 10000m 3 / h, particulate matter concentration control target C 0 is 50 μg / m 3 The unit's air duct cross-section dimensions are 1.4 m × 1.4 m, of which the bypass ventilation duct and depth filtration duct have cross-section dimensions of 1.4 m × 0.7 m and a length of 1 m. The HEPA filter has an effective filtration area of ​​60 m². 2 The filtration efficiency is 99.97%, and ζ and m are 18704 and 1.12 respectively. The first to fourth air valves are all of the same model, and their local resistance coefficient can be expressed as:

[0090] ;

[0091] ;

[0092] In the formula, It is a non-zero number with a value of 0.0001.

[0093] At a certain moment, the air supply volume is set at 10000 m³ / h. 3 The fan operates at 1700 rpm per hour, with a particulate matter concentration of [missing information]. C 1 and C 2 were 65 μg / m 3 and 60 μg / m 3 The concentration of particulate matter is adjusted by regulating the air valve. C 2 reduced to C 0 and below, i.e. C 2≤ C0. Substituting the above parameters into the formula in step S2, we can calculate:

[0094]

[0095]

[0096]

[0097]

[0098] Based on the objective function and constraints of step S2, the valve opening in the above formula is solved using a numerical iteration method. and Calculations show that... Q 1 and Q 2 are 7691.62 m respectively 3 / h and 2308.38 m 3 / h, and When they were 13.1% and 72.9% respectively, P total The minimum value is 116.3 Pa.

[0099] After the air valve is adjusted, the unit's operating time Δ t The air volume stabilized at 8000 m³ / min after 1 minute. 3 / h, when the fan speed is adjusted to 1900 rpm, the air delivery volume can reach 9970 m³ / h. 3 / h, satisfying The fan then operates at a speed of 1900 rpm. At this time, the second particulate matter concentration sensor 10 detects the particulate matter concentration. C 2 is 49.85 μg / m 3 ,satisfy C 2≤ C 0.

[0100] Example 3

[0101] A control system for a combined emergency and emergency ventilation and air conditioning unit, employing a control method for a combined emergency and emergency ventilation and air conditioning unit as described in any of Examples 1-2.

[0102] Example 4

[0103] A computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform a control method for a combined emergency and emergency ventilation and air conditioning unit as described in any of Examples 1-2.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for a combined emergency and emergency ventilation and air conditioning unit, characterized in that, Includes the following steps: S1: Set the set air volume supplied to the room by the unit's air outlet (14). Q set Set particulate matter concentration control targets C 0; The first air valve (7), the high-efficiency filter (8), and the second air valve (9) are positioned between the first particulate matter concentration sensor (6) and the second particulate matter concentration sensor (10). The first air valve (7), the high-efficiency filter (8), and the second air valve (9) form a deep filtration duct. The airflow through the first air valve (7), the high-efficiency filter (8), and the second air valve (9) in the deep filtration duct is... Q 2. Set the first air valve (7) and the second air valve (9) to be linked for control; The third air valve (11) and the fourth air valve (12) are positioned between the first particulate matter concentration sensor (6) and the second particulate matter concentration sensor (10). The third air valve (11) and the fourth air valve (12) form a bypass ventilation duct. The airflow through the third air valve (11) and the fourth air valve (12) in the bypass ventilation duct is: Q 1. The third air valve (11) and the fourth air valve (12) are set to be linked for control; The particulate matter concentration at the outlet of the fan (5) is detected in real time by the first particulate matter concentration sensor (6). C 1. The particulate matter concentration at the air inlet of the heating / cooling coil (13) is detected in real time by the second particulate matter concentration sensor (10). C 2. The current air volume is detected in real time by a flow meter (15). Q 0, ; S2: If C 1≤ C 0, adjust the opening degree of the first air valve (7) and the second air valve (9). Fully close, reducing the opening degree of the third air valve (11) and the fourth air valve (12). Fully open; like C 1> C 0, the total resistance of airflow through the bypass duct and the deep filter duct. P total With the objective of minimizing the value, the optimal damper opening is solved using a numerical iteration method. and Combination, and optimal airflow Q 1 and Q Combine 2, and adjust the damper opening to the optimal damper opening; Objective function: ; Constraints: ;0≤ ≤100%, 0≤ ≤100%; | P 1- P 2|≤0.1; In the formula: P 1 represents the pressure loss of air flowing through the bypass ventilation duct. P 2 represents the pressure loss of airflow through the depth filter duct; S3: Standby unit running time Δ t When the preset value is reached, if , If the threshold is met, the fan (5) will maintain its current speed; otherwise, it will operate according to... Calculate the target rotational speed of the fan (5) N ob , N 0 represents the current speed of the fan. κ To control the parameters, adjust the fan (5) speed to the target speed. N ob until satisfied ; S4: At the current air supply volume Q Under 0 operation, the particulate matter concentration detected in real time by the second particulate matter concentration sensor (10) C 2. The set particulate matter concentration control target is C Compare with 0, if C 2≤ C If the value is 0, maintain the current valve opening; otherwise, repeat steps S2-S3 until... C 2≤ C 0.

2. The control method for a combined emergency and emergency ventilation and air conditioning unit according to claim 1, characterized in that, The particulate matter concentration balance equation is: In the formula: η The filtration efficiency of the high-efficiency filter (8).

3. The control method for a combined emergency and emergency ventilation and air conditioning unit according to claim 2, characterized in that, Pressure loss of air flowing through the bypass duct P Pressure loss in 1 and deep filtration ducts P 2. Calculate according to the following formula: In the formula: λ 1 represents the friction factor of the bypass ventilation duct. λ 2 represents the friction factor of the deep filtration duct. ξ 1 represents the local resistance coefficient of the third air valve (11) and the fourth air valve (12). ξ 2 represents the local resistance coefficient of the first air valve (7) and the second air valve (9). L 1 represents the length of the bypass ventilation duct. L 2 represents the length of the depth filtration duct. D 1 represents the hydraulic diameter of the bypass ventilation duct. D 2 represents the hydraulic diameter of the deep filtration duct. A 1 represents the cross-sectional area of ​​the bypass ventilation duct. A 2 represents the cross-sectional area of ​​the deep filtration duct. A 3 represents the effective filtration area of ​​the high-efficiency filter (8). ρ air density, ζ and m The experimental coefficient is denoted as .

4. The control method for a combined emergency and emergency ventilation and air conditioning unit according to claim 3, characterized in that, The local resistance coefficient is related to the valve opening degree: 。 5. The control method for a combined emergency and emergency ventilation and air conditioning unit according to claim 4, characterized in that, ； ； In the formula: It is a non-zero number.

6. The control method for a combined emergency and emergency ventilation and air conditioning unit according to claim 1, characterized in that, The value of κ ranges from 0.1 to 2.

7. The control method for a combined emergency and emergency ventilation and air conditioning unit according to claim 1, characterized in that, The numerical iterative methods include gradient descent and bisection.

8. A control method for a combined emergency and emergency ventilation and air conditioning unit according to any one of claims 1-7, characterized in that, The value range is 1%-3%.

9. A control system for a combined emergency and emergency ventilation and air conditioning unit, characterized in that, The method for controlling a combined emergency and emergency ventilation and air conditioning unit as described in any one of claims 1-8 is adopted.

10. A computer-readable storage medium, characterized in that, The system includes a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform a combined emergency and emergency ventilation and air conditioning unit control method as described in any one of claims 1-8.

Images