CN114294804B - Power distributed ventilation system debugging method based on room airflow impedance - Google Patents
Power distributed ventilation system debugging method based on room airflow impedance Download PDFInfo
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Abstract
The invention provides a debugging method of a power distributed ventilation system based on room airflow impedanceThe method comprises the following steps: s1: closing a door and a window, and acquiring the air exhaust quantity Q when the branch exhaust fan of the room to be debugged is in the maximum gear; s2: starting a pressure difference sensor of the room to obtain a pressure difference delta P of the room; s3: calculating the room air flow impedance S; according to the formula
Obtaining the room airflow impedance S; s4: combining the pressure difference values required for the room design according to a formula
Acquiring a fresh air exhaust amount difference value delta G meeting the pressure difference value required by design; s5: determining the gear of a branch new fan of the room according to the fresh air volume requirement of the room; s6: combining the fresh air volume difference delta G obtained in the S4 and the fresh air volume of the S5, and adjusting the gear of the branch exhaust fan of the room; s7: repeating S1-S6 until the branch exhaust fans and the branch fresh air fans of all the rooms are debugged; s8: adjusting the gear of the main fresh air fan; s9: adjusting the gear of the main exhaust fan; the room ventilation system can be adjusted quickly.
Description
Technical Field
The invention relates to the technical field of ventilation debugging, in particular to a debugging method of a power distribution type ventilation system based on room airflow impedance.
Background
The ventilation system engineering is mainly divided into three links of design, construction and debugging, and in the three links, the debugging of the ventilation system is an important link for guaranteeing the normal operation of the ventilation system, realizing the design requirements and effectively playing roles.
The existing ventilation system debugging technology mainly adjusts the air quantity of an air port pipeline by manually measuring the air quantity of an air port and adjusting the opening of a valve by a wrench (or an electric valve), hundreds of air ports, valves and the like are often designed in large buildings, and the debugging of the ventilation system is high in workload and heavy in task.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and particularly provides a debugging method of a power distributed ventilation system based on room airflow impedance, which can quickly adjust the room ventilation system.
In order to achieve the above object, the present invention provides a method for tuning a power distributed ventilation system based on room airflow impedance, comprising the following steps:
s1: closing a door and a window, and acquiring the air exhaust quantity Q when the branch exhaust fan of the room to be debugged is in the maximum gear;
s2: starting a differential pressure sensor of the room to obtain differential pressure delta P of the room;
s3: calculating the room air flow impedance S; according to the formula
Obtaining the room airflow impedance S;
s4: combining the pressure difference value required by the room design according to a formula
Acquiring a fresh air exhaust amount difference value delta G meeting the pressure difference value required by design;
s5: determining the gear of a branch new fan of the room according to the fresh air volume requirement of the room;
s6: combining the fresh air volume difference delta G obtained in the step S4 and the fresh air volume of the step S5, and adjusting the gear of the branch exhaust fan of the room;
s7: repeating S1-S6 until the branch exhaust fans and the branch fresh air fans of all the rooms are debugged;
s8: adjusting the gear of the main fresh air fan;
s9: and adjusting the gear of the main exhaust fan.
In the scheme, the method comprises the following steps: the epidemic situation working condition debugging method further comprises the following steps of:
s10: random inspection; randomly selecting part of rooms to carry out sampling inspection, detecting the fresh air volume of the branch fresh air fan and the exhaust air volume of the branch exhaust fan through the air volume cover, comparing the fresh air volume with the exhaust air volume required by room design, and if the design requirements of the rooms are met, successfully debugging.
In the scheme, the method comprises the following steps: in step S10, a sampling check is performed for each house type having the same area, the same use function, and the same use characteristics.
In the scheme, the method comprises the following steps: step S1 further comprises the steps of:
s1-1: closing the door and the window of the room to be debugged to form a closed space;
s1-2: starting a main exhaust fan and a branch exhaust fan in the room, and adjusting the branch exhaust fan to the maximum gear;
s1-3: detecting the static pressure of the inlet of the exhaust fan of the current branch;
s1-4: and (4) bringing the current gear of the branch exhaust fan and the detected static pressure of the inlet of the branch exhaust fan into wind volume and wind pressure curves with different gears and different static pressures of the inlet, and checking curve data to obtain the exhaust air volume Q.
In the scheme, the method comprises the following steps: step S5 further includes:
s5-1: starting a main fresh air fan and branch fresh air fans in the room;
s5-2: measuring static pressure at an inlet of a fresh air fan of the room branch;
s5-3: introducing the fresh air volume required by the design of the room and the inlet static pressure measured in the step S5-2 into air volume and air pressure curves at different gears and different inlet static pressures, and checking curve data to obtain the gear of the new fan of the room branch;
s5-4: and adjusting the new fan of the room branch according to the obtained gear of the S5-3.
In the scheme, the method comprises the following steps: the design requirement of the step S5-3 is the number of people accommodated in the room and the required fresh air volume under the condition of room use.
In the scheme, the method comprises the following steps: step S7 further includes: and debugging each room from the tail end to the beginning end of the fresh air pipeline.
In the scheme, the method comprises the following steps: step S8 further includes: acquiring total fresh air volume according to the fresh air volume of each room, and adjusting the gear of the main fresh air fan according to the total fresh air volume;
step S9 further includes: and obtaining the total air exhaust amount according to the air exhaust amount of each room, and adjusting the gear of the main exhaust fan according to the total air exhaust amount.
In the scheme, the method comprises the following steps: is suitable for the ventilation system debugging of the respiratory tract infectious ward.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) The ventilation requirement of a room can be quickly met; the method of 'room impedance regulating ventilation system' is used for regulating the gears of branch air blowers and exhaust fans and main air blowers so as to meet the requirements of room fresh air volume and pressure difference.
(2) Except that the verification experiment is carried out in individual rooms, the other rooms do not need to use an air volume cover, an anemometer and the like to carry out measurement and debugging in each wind gap, and the workload of debugging is reduced.
(3) The air exhaust quantity is adjusted firstly to meet the air exhaust requirement, the airflow impedance detection of each room is calculated by combining the pressure difference sensor, the fresh air exhaust quantity difference value is obtained, the fresh air quantity is adjusted according to the fresh air exhaust difference value, the adjustment is reliable, the adjustment can be carried out according to the ventilation design requirement of each room, and the comfort of each room is guaranteed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a flow chart of a method of tuning a distributed power ventilation system based on room air flow impedance in accordance with the present invention;
FIG. 3 is a graph of wind volume and pressure at different gears and different inlet static pressures;
FIG. 4 is a flow chart of a method for commissioning a power distributed ventilation system suitable for use in a general ward of the present invention;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1-2, a method for debugging a power distributed ventilation system based on room airflow impedance is suitable for debugging a ventilation system of a respiratory infectious ward, and comprises the following steps:
s1: closing a door and a window, and acquiring the air exhaust quantity Q when the branch exhaust fan of the room to be debugged is in the maximum gear;
s1-1: closing the door and the window of the room to be debugged to form a closed space;
s1-2: starting a main exhaust fan and a branch exhaust fan in the room, and adjusting the branch exhaust fan to the maximum gear;
s1-3: detecting the static pressure of the inlet of the exhaust fan of the current branch;
s1-4: the current gear of the branch exhaust fan and the detected static pressure of the inlet of the branch exhaust fan are brought into wind volume and wind pressure curves of different gears and different inlets under static pressure, curve data are checked, and exhaust volume Q is obtained;
s2: starting a differential pressure sensor of the room to obtain differential pressure delta P of the room;
s3: calculating the room air flow impedance S; according to the formula
Obtaining the room airflow impedance S;
s4: combining the pressure difference values required for the room design according to a formula
Obtaining a fresh air volume difference value delta G meeting the design requirement under the pressure difference value;
s5: determining the gear of a branch new fan of the room according to the fresh air volume requirement of the room;
s5-1: starting a main fresh air fan and branch fresh air fans in the room;
s5-2: measuring static pressure at an inlet of a fresh air fan of the room branch;
s5-3: introducing the fresh air volume required by the design of the room and the inlet static pressure measured in the step S5-2 into air volume and air pressure curves at different gears and different inlet static pressures, and checking curve data to obtain the gear of the new fan of the room branch;
s5-4: adjusting the new fan of the room branch according to the gear obtained in the step S5-3;
s6: combining the fresh air volume difference delta G obtained in the step S4 and the fresh air volume of the step S5, and adjusting the gear of the branch exhaust fan of the room;
s7: repeating S1-S6, and sequentially debugging each room from the tail end to the initial end of the fresh air pipeline until the branch exhaust fans and the branch fresh air fans of all rooms are debugged;
s8: adjusting the gear of the main fresh air fan; acquiring total fresh air volume according to the fresh air volume of each room, and adjusting the gear of the main fresh air fan according to the total fresh air volume;
s9: adjusting the gear of the main exhaust fan, obtaining the total exhaust air volume according to the exhaust air volume of each room, and adjusting the gear of the main exhaust fan according to the total exhaust air volume;
s10: random inspection; randomly selecting part of rooms to perform sampling inspection, detecting the fresh air volume of the branch fresh air fan and the exhaust air volume of the branch exhaust fan through the air volume cover, comparing the fresh air volume with the exhaust air volume required by room design, and if the fresh air volume meets the design requirements of the rooms, successfully debugging the rooms.
Wherein, the design requirement of the step S5-3 is the accommodating number of people in the room and the required fresh air volume under the condition of room use. In step S10, a sampling check is performed for each house type having the same area, the same use function, and the same use characteristics.
The respiratory infectious ward is negative pressure relatively outdoors, at the moment, except the process that medical personnel enter the ward to diagnose and treat, patients in the negative pressure ward have infectivity, and visitors basically cannot enter the ward, so that the condition that the number of the personnel in the negative pressure ward is greatly increased is not large, the change of the flow of the people is not large, the most important requirement is to ensure the requirement of the pressure difference of the room, and air with viruses in the room is prevented from entering other areas. Under the condition, the ventilation system mainly plays a role in controlling indoor pollutants to be discharged in time, ensuring the breathing safety and health of medical care personnel and patients in a room, and simultaneously avoiding the pollution to other spaces outside the room. Therefore, the key and target of the adjustment of the power distribution type ventilation system is that the air volume of the fresh air system reaches the design requirement, and the air volume of the exhaust system ensures the design pressure difference of the room. For the adaptation work, the room fresh, the air discharge and the room pressure difference value need to be controlled.
The invention also provides a debugging method of the power distribution type ventilation system suitable for the general ward, which comprises the following steps:
s101: opening branch fresh air machines of the fresh air host and all rooms;
s102: adjusting the gear of the branch fresh air machine of each room according to the design requirement of the branch fresh air machine of each room;
s103: converting voltage signals of gears of branch fresh air fans of all rooms into air quantity values; each gear corresponds to an air volume value of the fan, and the air volume value is obtained through experimental tests and can be obtained through an experimental test curve;
s104: calculating the total fresh air quantity value and converting the total fresh air quantity value into an electric signal; the gear of the fresh air host is adjusted according to the total fresh air quantity value;
s105: starting branch exhaust fans of the exhaust main machine and all rooms;
s106: adjusting the gear of the branch exhaust fans of each room according to the design requirements of the branch exhaust fans of each room;
s107: converting voltage signals of gears of branch fresh air fans of all rooms into air quantity values;
s1011: calculating the total air exhaust quantity value and converting the total air exhaust quantity value into an electric signal; adjusting the gear of the exhaust main machine according to the total exhaust value;
s1012: sequentially detecting the air quality of each room through an air detection sensor, and comparing the detected air quality data with an allowable range;
s1013: if the detected air quality data is smaller than the allowable range, the gears of the branch fresh air fan, the fresh air host, the exhaust host and the branch exhaust fan are reduced, and S1012 is repeated until the detected air quality data is within the allowable range;
if the detected air quality data is larger than the allowable range, the gears of the branch fresh air fan, the fresh air host, the exhaust host and the branch exhaust fan are increased, and S1012 is repeated until the detected air quality data is within the allowable range;
s1014: and completing the debugging of the general ward.
Wherein, the air detection sensor is used for detecting the content of PM2.5, CO2, TVOC or formaldehyde and the like.
The ventilation system of the general ward mainly plays a role in ensuring the respiratory health of medical staff and patients in a room, namely the requirement on fresh air volume, so that the key and the aim of the adjustment of the power distribution type ventilation system are that the air volume reaches the design requirement, and because of the reasons of ward visit and the like of doctors, the flow of people in the ward dynamically changes, and the required fresh air volume also needs to dynamically change, therefore, the ventilation mode of adopting power distribution type transmission and exhaust can better meet the requirement of the use process.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A method for debugging a power distributed ventilation system based on room airflow impedance is characterized by comprising the following steps: the method comprises the following steps:
s1: closing a door and a window, and acquiring the air exhaust quantity Q when the branch exhaust fan of the room to be debugged is in the maximum gear;
s2: starting a pressure difference sensor of the room to obtain a pressure difference delta P of the room;
s3: calculating the room air flow impedance S; according to the formula
Obtaining the room airflow impedance S;
s4: combining the pressure difference values required for the room design according to a formula
Obtaining a differential pressure value required for satisfying the designThe difference value delta G of the fresh air exhaust volume is obtained;
s5: determining the gear of a branch fresh air fan of the room according to the fresh air volume requirement of the room;
s6: combining the fresh air volume difference delta G obtained in the step S4 and the fresh air volume of the step S5, and adjusting the gear of the branch exhaust fan of the room;
s7: repeating S1-S6 until the branch exhaust fans and the branch fresh air fans of all the rooms are debugged;
s8: adjusting the gear of the main fresh air fan;
s9: and adjusting the gear of the main exhaust fan.
2. The method of commissioning a room-airflow-impedance-based distributed power ventilation system according to claim 1, wherein: the epidemic situation working condition debugging method further comprises the following steps:
s10: random inspection; randomly selecting part of rooms to carry out sampling inspection, detecting the fresh air volume of the branch fresh air fan and the exhaust air volume of the branch exhaust fan through the air volume cover, comparing the fresh air volume with the exhaust air volume required by room design, and if the design requirements of the rooms are met, successfully debugging.
3. The method of commissioning a room-airflow-impedance-based distributed power ventilation system according to claim 2, wherein: in step S10, a sampling check is performed for each house type having the same area, the same use function, and the same use characteristics.
4. The method of commissioning a powered distributed ventilation system based on room air flow impedance of claim 1, wherein: step S1 further comprises the steps of:
s1-1: closing the door and the window of the room to be debugged to form a closed space;
s1-2: starting a main exhaust fan and a branch exhaust fan in the room, and adjusting the branch exhaust fan to the maximum gear;
s1-3: detecting the static pressure of the inlet of the exhaust fan of the current branch;
s1-4: and (4) bringing the current gear of the branch exhaust fan and the detected static pressure of the inlet of the branch exhaust fan into wind volume and wind pressure curves with different gears and different static pressures of the inlet, and checking curve data to obtain the exhaust air volume Q.
5. The method of commissioning a room-airflow-impedance-based distributed power ventilation system according to claim 1, wherein: step S5 further includes:
s5-1: starting a main fresh air fan and branch fresh air fans in the room;
s5-2: measuring the static pressure of the inlet of the fresh air fan of the room branch;
s5-3: the new air volume required by the design of the room and the inlet static pressure measured in the step S5-2 are brought into air volume and air pressure curves at different gears and different inlet static pressures, curve data are checked, and the gears of the new branch fans of the room are obtained;
s5-4: and adjusting the new fan of the room branch according to the obtained gear of the S5-3.
6. The method of commissioning a powered distributed ventilation system based on room air flow impedance of claim 5, wherein: the design of the step S5-3 needs the number of people accommodated in the room and the fresh air volume needed under the condition of room use.
7. The method of commissioning a powered distributed ventilation system based on room air flow impedance of claim 1, wherein: step S7 further includes: and debugging all rooms from the tail end to the beginning end of the fresh air pipeline.
8. The method of commissioning a room-airflow-impedance-based distributed power ventilation system according to claim 1, wherein: step S8 further includes: acquiring total fresh air volume according to the fresh air volume of each room, and adjusting the gear of the main fresh air fan according to the total fresh air volume;
step S9 further includes: and obtaining the total air exhaust amount according to the air exhaust amount of each room, and adjusting the gear of the main exhaust fan according to the total air exhaust amount.
9. The method of commissioning a powered distributed ventilation system based on room air flow impedance of claim 1, wherein: is suitable for the ventilation system debugging of the respiratory tract infectious ward.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2357365A2 (en) * | 2010-02-01 | 2011-08-17 | Brink Climate Systems B.V. | Air movement system |
| CN105987817A (en) * | 2015-02-13 | 2016-10-05 | 广州汽车集团股份有限公司 | Matching method of cooling module of passenger vehicle |
| CN111059703A (en) * | 2019-12-04 | 2020-04-24 | 珠海格力电器股份有限公司 | Air volume control method |
| CN112240579A (en) * | 2019-07-17 | 2021-01-19 | 青岛海尔智能技术研发有限公司 | Range hood and control method thereof |
| CN112254320A (en) * | 2020-10-22 | 2021-01-22 | 重庆大学 | Adaptive variable differential pressure control method for air conditioner variable flow water system based on AI |
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- 2022-01-25 CN CN202210087675.9A patent/CN114294804B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2357365A2 (en) * | 2010-02-01 | 2011-08-17 | Brink Climate Systems B.V. | Air movement system |
| CN105987817A (en) * | 2015-02-13 | 2016-10-05 | 广州汽车集团股份有限公司 | Matching method of cooling module of passenger vehicle |
| CN112240579A (en) * | 2019-07-17 | 2021-01-19 | 青岛海尔智能技术研发有限公司 | Range hood and control method thereof |
| CN111059703A (en) * | 2019-12-04 | 2020-04-24 | 珠海格力电器股份有限公司 | Air volume control method |
| CN112254320A (en) * | 2020-10-22 | 2021-01-22 | 重庆大学 | Adaptive variable differential pressure control method for air conditioner variable flow water system based on AI |
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