Method, apparatus, system, computer device and medium for quantifying the airtightness of a pressurized building
By measuring the airflow and pressure change rate of pressurized buildings, the net space and pressure change rate are obtained through fitting, and the leakage amount and unit volume leakage rate are calculated. This solves the problem of inaccurate airtightness assessment of large-volume enclosed spaces in existing technologies, and realizes quantitative assessment of airtightness of buildings under different pressures and support for pressurization design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA CONSTR THIRD ENG BUREAU GRP CO LTD
- Filing Date
- 2024-12-18
- Publication Date
- 2026-07-14
AI Technical Summary
Existing airtightness testing methods cannot accurately determine the airtightness of large-volume enclosed spaces, nor can they provide airtightness data for buildings under different operating pressures, resulting in a lack of basis for pressure compensation design. Existing testing methods are not sufficiently applicable and accurate for both small-volume and large-volume products.
By measuring the airflow rate and air pressure rate of pressurized buildings, the net space and air pressure rate are fitted to calculate the leakage amount and leakage rate per unit volume, thereby achieving a quantitative assessment of the airtightness of pressurized buildings under any air pressure.
It provides more accurate airtightness assessment, can provide data support for building pressurization design, improves the standardization and applicability of testing, and is suitable for large-volume enclosed spaces.
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Figure CN119714726B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pressurized building airtightness testing technology, specifically to a test method, test equipment, system, computer equipment, and medium for quantifying the airtightness of pressurized buildings. Background Technology
[0002] Pressurized buildings require an indoor-outdoor pressure difference of over 10 kPa, demanding extremely high airtightness. However, the development of pressurized buildings is still in its early stages, lacking a complete standard system and technical guidance for airtightness testing. Currently, engineers use the following method to measure airtightness: pressurize the building's indoor air pressure to the design pressure using pressurization equipment, then stop pressurizing. The rate of pressure change after one hour is used as the airtightness data. For example, if a pressurized building project has a design pressure of 30 kPa, and pressurization is stopped after reaching 30 kPa, due to leakage, the building pressure drops to 27 kPa after one hour, a 10% decrease. This is recorded as an airtightness of 10% / h.
[0003] In the existing technology, technicians have explored the airtightness detection of enclosed spaces. A patented intelligent airtightness identification device for pressure-bearing buildings can be activated by a controller to pressurize and heat the outside air or pressurize it at a constant temperature and send it into the pressure-bearing building. When the indoor air reaches the set value or the air pressure stabilizes, the controller activates a moving carrier and an infrared imager to detect the heat leakage at the joints between the wall panels of the pressure-bearing building.
[0004] A patented method and apparatus for quantitatively monitoring the airtightness of a confined space discloses a method that first measures the time-dependent change in air pressure PI(t) inside the confined space and / or the time-dependent change in the air pressure difference between the outside and inside of the confined space PD(t); then, based on the time-dependent rate of change of PI(t) and / or PD(t), a quantitative value S of the airtightness of the confined space is calculated. S is directly proportional to the time-dependent rate of change of PI(t) and inversely proportional to PD(t). This method can provide a quantitative value of the degree of airtightness.
[0005] However, existing methods for measuring airtightness have shortcomings. For example, using inert gas to measure the airtightness of a closed space is not suitable for large-volume closed spaces; infrared heat leakage detection is convenient for small-volume products or large-volume products under manufacturing, but it is difficult to judge products that have already been installed on site using infrared detection; and while air pressure changes can be used to detect the airtightness of a closed space, this method is not accurate enough in judging airtightness and thus lacks universal judgment criteria.
[0006] In cases of increased space, existing airtightness testing methods directly ignore the volume of the pressurized building. Taking pressurized buildings with volumes of 5000 cubic meters and 50 cubic meters as examples, assuming that due to leakage, the indoor air pressure in both buildings drops from 30 kPa to 27 kPa in one hour (a 10% decrease), it is clear that the total leakage of the 5000 cubic meter pressurized building during this process is far greater than that of the 50 cubic meter pressurized building. Because of this leakage, the building requires pressurization, but existing airtightness data cannot provide a basis for the design of this pressurization process.
[0007] The existing measurement methods only provide data measured at a specific pressure. However, during the operation of a pressurized building, the indoor pressure is adjusted according to actual needs. For example, data for a pressurized building at 30 kPa may be measured, but the building may actually operate at 25 kPa or 35 kPa. The lack of airtightness data at these two pressure points also fails to mitigate the errors caused by the variability in pressure measurement locations. Summary of the Invention
[0008] This application provides a test method, test equipment, system, computer equipment, and medium for quantifying the airtightness of pressurized buildings, which improves the limitations of existing airtightness measurement methods.
[0009] In a first aspect, this application provides a test method for quantifying the airtightness of pressurized buildings, including:
[0010] The net space of the pressurized building is obtained by measuring the rate of change of airflow and the rate of change of air pressure in the first pressurized building after pressurizing the pressurized building to the first air pressure.
[0011] The internal air pressure of the pressurized building after pressurization to the second air pressure is obtained, and the change rate of the second pressurized building air pressure is obtained by fitting the internal air pressure.
[0012] The leakage of the pressurized building under any pressure is obtained based on the net space of the pressurized building and the pressure change rate of the second pressurized building.
[0013] The leakage rate per unit volume of the pressurized building is obtained based on the leakage amount of the pressurized building under any air pressure, and the air tightness of the pressurized building is judged based on the leakage rate per unit volume of the pressurized building.
[0014] In some embodiments, the determination of the airflow rate change rate and the first pressurized building air pressure rate change rate to obtain the pressurized building net space includes:
[0015] Obtain the internal air pressure and volume of the pressurized building;
[0016] The air pressure inside the pressurized building is fitted to obtain a function of air pressure changing with time;
[0017] The air volume inside the pressurized building is fitted to obtain a function of airflow rate changing with time;
[0018] The net space of the pressurized building is obtained based on the functions of air pressure and air flow rate over time.
[0019] In some embodiments, obtaining the pressurized building net space based on the function of air pressure changing over time and the function of air flow changing over time includes:
[0020] The pressure change function and the air flow rate change function are respectively differentiated with respect to time to obtain the pressure change rate and the air flow rate change rate of the first pressurized building.
[0021] By substituting the air pressure and air flow rate at several time points into the air pressure change rate and air flow rate change rate of the first pressurized building, the derivative values of the air pressure change function with time and the air flow rate change function with time corresponding to each time point are obtained.
[0022] Based on the derivative values of the air pressure change function over time and the air flow rate change function over time at each time point, the pressurized net volume of the pressurized building at each time point is obtained.
[0023] The average value of the pressurized net volume of the pressurized building at each time point is taken as the net space of the pressurized building.
[0024] In some embodiments, by The net pressurized volume V of the pressurized building at each time point is obtained, where, The first pressurized building air pressure change rate, R is the rate of change of airflow, T is the molar gas constant, T is the gas temperature inside the pressurized building, t is time, Q is the air volume of the pressurized building converted to ambient air pressure, P is the air pressure inside the pressurized building, P1 is the ambient air pressure, and P0 is the standard atmosphere.
[0025] In some embodiments, obtaining the internal air pressure of the pressurized building after it has been pressurized to a second air pressure, and fitting the internal air pressure to obtain the second pressurized building air pressure change rate, includes:
[0026] After the indoor air pressure is increased to the second air pressure, the pressurized building interior air pressure after the increase to the second air pressure is obtained;
[0027] The internal air pressure of the pressurized building after being increased to the second air pressure is fitted to obtain a function of the air pressure of the pressurized building after being increased to the second air pressure as a function of time.
[0028] The rate of change of the second pressurized building air pressure is obtained by differentiating the function of the pressurized building air pressure with respect to time after it has been increased to the second air pressure.
[0029] In some embodiments, obtaining the leakage of the pressurized building at any pressure based on the net space of the pressurized building and the pressure change rate of the second pressurized building includes:
[0030] Depend on The leakage rate of the pressurized building under any air pressure is obtained, where, denoted as the pressure change rate of the second pressurized building, P′ as the internal pressure of the pressurized building, R as the molar gas constant, T as the internal gas temperature of the pressurized building, t as time, V′ as the net space of the pressurized building, P1 as the ambient pressure, P0 as the standard atmospheric pressure, and Q′ as the air volume of the pressurized building converted to ambient pressure.
[0031] Secondly, this application provides a testing device for quantifying the airtightness of pressurized buildings, comprising:
[0032] The pressurized net space calculation module is used to obtain the net space of the pressurized building by measuring the rate of change of airflow and the rate of change of air pressure of the first pressurized building after pressurizing the pressurized building to the first air pressure.
[0033] The data fitting module is used to obtain the internal air pressure of the pressurized building after it is pressurized to the second air pressure, and to fit the internal air pressure to obtain the air pressure change rate of the second pressurized building.
[0034] The leakage calculation module is used to obtain the leakage of the pressurized building under any pressure based on the net space of the pressurized building and the pressure change rate of the second pressurized building.
[0035] The air tightness calculation module is used to obtain the unit volume leakage rate of the pressurized building based on the leakage amount of the pressurized building under any air pressure, and to determine the air tightness of the pressurized building based on the unit volume leakage rate of the pressurized building.
[0036] Thirdly, this application provides a test system for quantifying the air tightness of pressurized buildings, including: pressurization equipment, volumetric flow meter, electric valve, pressure transmitter, control module, and the aforementioned test equipment for quantifying the air tightness of pressurized buildings.
[0037] The control module is connected to the pressurizing equipment, the volumetric flow meter, the electric valve, and the pressure transmitter respectively. It is used to control the pressurizing equipment and the electric valve to pressurize the pressurizing building, and after pressurizing the pressurizing building to the first air pressure, it controls the volumetric flow meter to measure the air flow and the pressure transmitter to measure the air pressure of the pressurizing building.
[0038] The quantifiable pressurized building airtightness testing equipment is used to measure the airflow change rate and the first pressurized building air pressure change rate to obtain the pressurized building net space; obtain the internal air pressure of the pressurized building after pressurization to a second air pressure, and fit the internal air pressure to obtain the second pressurized building air pressure change rate; obtain the leakage amount of the pressurized building under any air pressure based on the pressurized building net space and the second pressurized building air pressure change rate; obtain the pressurized building unit volume leakage rate based on the pressurized building unit volume leakage rate, and determine the pressurized building airtightness based on the pressurized building unit volume leakage rate.
[0039] Fourthly, this application provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the methods described above.
[0040] Fifthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods described above.
[0041] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:
[0042] 1. Introduce the net pressurization volume index inside the pressurized building. By measuring the airflow change rate and the air pressure change rate of the first pressurized building, the net space of the pressurized building can be obtained, which can provide support for the selection of pressurized building equipment.
[0043] 2. By using the ratio analysis of the increased internal pressurized net volume and the pressure change rate to obtain the pressure difference change rate of the standard volume, the comparison is more standardized, which can provide a basis for building pressurization design and has higher data value. Attached Figure Description
[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0045] Figure 1 This is a schematic diagram of a test method for quantifiable pressurized building airtightness provided in an embodiment of this application;
[0046] Figure 2 This is a schematic diagram of a test device for quantifiable pressurized building airtightness provided in an embodiment of this application;
[0047] Figure 3This is a schematic diagram of a test system for quantifiable pressurized building airtightness provided in an embodiment of this application;
[0048] Figure 4 This is a schematic diagram of an embodiment of the computer device provided in this application. Detailed Implementation
[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0050] In the following description, specific embodiments of this application will be illustrated with reference to steps and symbols performed by one or more computers, unless otherwise stated. Therefore, these steps and operations will be referred to several times as being performed by a computer, and computer execution as referred to herein includes operations by a computer processing unit representing electronic signals of data in a structured format. This operation transforms the data or maintains it at a location in the computer's memory system, which can be reconfigured or otherwise alter the operation of the computer in a manner well known to those skilled in the art. The data structure maintained by the data is the physical location of the memory, which has specific characteristics defined by the data format. However, the principles of this application are described in the foregoing text, which is not intended to be limiting, and those skilled in the art will understand that many of the following steps and operations can also be implemented in hardware.
[0051] The terms "module" or "unit" as used herein can be considered as software objects executing on the computing system. Different components, modules, engines, and services described herein can be considered as implementations on the computing system. The apparatus and methods described herein are preferably implemented in software, but can also be implemented in hardware, both of which are within the scope of this application.
[0052] Those skilled in the art will understand that, unless explicitly stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in the specification of this application means the presence of features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.
[0053] First, the principle of quantitative pressurized building airtightness in this application will be explained:
[0054] According to the gas law:
[0055] PV = nRT (1)
[0056] During building pressurization, the indoor temperature changes little, the effect of temperature on pressure is negligible, and the net volume of the pressurization space remains constant throughout the process:
[0057]
[0058] Calculate the amount of gaseous substance:
[0059]
[0060] From formulas (2) and (3), we can obtain:
[0061]
[0062] Formula (4) can be transformed to obtain:
[0063]
[0064] Where P is the internal air pressure of the pressurized building, n is the amount of gas inside the pressurized building, R is the molar gas constant, T is the internal gas temperature of the pressurized building, t is time, Q is the air volume of the pressurized building converted to ambient air pressure, V is the net pressurized volume of the pressurized building, P1 is the ambient air pressure, and P0 is the standard atmospheric pressure.
[0065] In this application, the pressurized net volume of a pressurized building refers to the space after deducting incompressible materials that occupy gas space within the building, including partition walls, furniture, and appliances. The space occupied by these materials does not participate in the building's pressurization or depressurization process.
[0066] As can be seen from equation (5), the leakage of a pressurized building at a certain pressure can be determined by measuring the rate of change of pressure over time. It can be obtained, but this requires knowing the net space of the pressurized building first. After the building is completed, due to the large amount of decoration, appliances, and equipment inside, it is impossible to obtain the accurate net space directly from the drawings.
[0067] To obtain the accurate net space of the pressurized building, the following method is used:
[0068] Formula (4) can be transformed to obtain:
[0069]
[0070] As can be seen from equation (6), by pressurizing the pressurized building, the airflow rate can be measured. and pressurized building air pressure change rate The net space of the pressurized building can be obtained after considering these two parameters. Because pressurized buildings exhibit significant leakage under large pressure differentials, the net space measurement should be conducted under a small pressure difference between the indoor and outdoor areas. Based on field experience, it is recommended that the pressure difference between the inside and outside of the pressurized building be less than 100 Pa during the test.
[0071] Please see Figure 1 , Figure 1 A test method for quantifiable pressurized building airtightness provided in this application embodiment includes:
[0072] 101: The net space of the pressurized building is obtained by measuring the rate of change of airflow and the rate of change of air pressure in the first pressurized building after pressurizing the building to the first pressure.
[0073] 102: Obtain the internal air pressure of the pressurized building after it is pressurized to the second air pressure, and fit the internal air pressure to obtain the air pressure change rate of the second pressurized building;
[0074] 103: The leakage of the pressurized building under any pressure is obtained based on the net space of the pressurized building and the pressure change rate of the second pressurized building;
[0075] 104: The leakage rate per unit volume of the pressurized building is obtained based on the leakage amount of the pressurized building under any air pressure, and the air tightness of the pressurized building is judged based on the leakage rate per unit volume of the pressurized building.
[0076] In another specific example, the net space of the pressurized building is obtained by measuring the rate of change of airflow and the rate of change of air pressure in the first pressurized building, including:
[0077] Obtain the internal air pressure and volume of the pressurized building;
[0078] The air pressure inside the pressurized building was fitted to obtain a function of air pressure changing with time;
[0079] The airflow rate as a function of time is obtained by fitting the air volume inside the pressurized building.
[0080] The net space of the pressurized building is obtained based on the functions of air pressure and air flow rate over time.
[0081] In another specific example, based on the functions of air pressure and airflow over time, the net space of the pressurized building is obtained, including:
[0082] By differentiating the functions of air pressure and airflow over time with respect to time, the rates of change of air pressure and airflow in the first pressurized building are obtained.
[0083] By substituting the air pressure and air flow rate at several time points into the air pressure change rate and air flow rate change rate of the first pressurized building, the derivative values of the air pressure change function with time and the air flow rate change function with time at each time point are obtained.
[0084] The net pressurization volume of the pressurized building at each time point is obtained by using the derivative of the function of air pressure changing with time and the derivative of the function of air flow changing with time.
[0085] The average value of the pressurized net volume of the pressurized building at each time point is taken as the net space of the pressurized building.
[0086] In another specific example, by The net pressurized volume V of the pressurized building at each time point is obtained, where, The first pressurized building air pressure change rate, R is the rate of change of airflow, T is the molar gas constant, T is the gas temperature inside the pressurized building, t is time, Q is the air volume of the pressurized building converted to ambient air pressure, P is the air pressure inside the pressurized building, P1 is the ambient air pressure, and P0 is the standard atmosphere.
[0087] In another specific example, the internal air pressure of the pressurized building after being pressurized to the second air pressure is obtained, and the rate of change of the second pressurized building air pressure is obtained by fitting the internal air pressure, including:
[0088] After the indoor air pressure is increased to the second air pressure, the pressurized building interior air pressure after the increase to the second air pressure is obtained;
[0089] The internal air pressure of the pressurized building after increasing to the second air pressure was fitted to obtain a function of the air pressure of the pressurized building after increasing to the second air pressure as a function of time.
[0090] The rate of change of the second pressurized building's air pressure is obtained by differentiating the function of the building's air pressure over time after it has increased to the second air pressure.
[0091] In another specific example, the leakage of the pressurized building at any pressure is obtained based on the net space of the pressurized building and the pressure change rate of the second pressurized building, including:
[0092] Depend on The leakage rate of the pressurized building under any air pressure is obtained, where, denoted as the pressure change rate of the second pressurized building, P′ as the internal pressure of the pressurized building, R as the molar gas constant, T as the internal gas temperature of the pressurized building, t as time, V′ as the net space of the pressurized building, P1 as the ambient pressure, P0 as the standard atmospheric pressure, and Q′ as the air volume of the pressurized building converted to ambient pressure.
[0093] In another specific example, the leakage rate per unit volume of the pressurized building is obtained based on the leakage amount of the pressurized building under any air pressure, and the airtightness of the pressurized building is determined based on the leakage rate per unit volume, including:
[0094] The leakage rate per unit volume of a building is obtained by dividing the leakage of a pressurized building under any air pressure by the standard volume of the building.
[0095] The airtightness of pressurized buildings is determined by comparing the leakage rate per unit volume of the building with preset indicators.
[0096] For example, if the leakage rate per unit volume of the building is not less than a preset indicator, the pressurized building is considered to have low airtightness. If the leakage rate per unit volume of the building is less than the preset indicator, the pressurized building is considered to have high airtightness. The preset indicator can be adjusted according to the standard volume of the pressurized building or the application environment. This embodiment of the invention is not limited to a single specific value.
[0097] Secondly, to facilitate better implementation of the testing methods provided in the embodiments of this application, the embodiments of this application also provide a testing device based on the above-described testing methods. The meanings of the terms used are the same as in the above-described testing methods, and specific implementation details can be found in the descriptions within the method embodiments.
[0098] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of the testing equipment provided in the embodiments of this application. The testing equipment 200 may include a pressurization net space calculation module 201, a data fitting module 202, a leakage calculation module 203, and an airtightness calculation module 204, wherein:
[0099] The pressurized net space calculation module 201 is used to obtain the net space of the pressurized building by measuring the rate of change of air flow and the rate of change of air pressure of the first pressurized building after pressurizing the pressurized building to the first air pressure.
[0100] The data fitting module 202 is used to obtain the internal air pressure of the pressurized building after it is pressurized to the second air pressure, and to fit the internal air pressure to obtain the air pressure change rate of the second pressurized building.
[0101] Leakage calculation module 203 is used to obtain the leakage of the pressurization building under any pressure based on the net space of the pressurization building and the pressure change rate of the second pressurization building.
[0102] The air tightness calculation module 204 is used to obtain the unit volume leakage rate of the pressurized building based on the leakage amount of the pressurized building under any air pressure, and to determine the air tightness of the pressurized building based on the unit volume leakage rate of the pressurized building.
[0103] In some embodiments of this application, the pressurization net space calculation module 201 is used for:
[0104] Obtain the internal air pressure and volume of the pressurized building;
[0105] The air pressure inside the pressurized building was fitted to obtain a function of air pressure changing with time;
[0106] The airflow rate as a function of time is obtained by fitting the air volume inside the pressurized building.
[0107] The net space of the pressurized building is obtained based on the functions of air pressure and airflow over time.
[0108] In some embodiments of this application, the pressurization net space calculation module 201 is further configured to:
[0109] By differentiating the functions of air pressure and airflow over time with respect to time, the rates of change of air pressure and airflow in the first pressurized building are obtained.
[0110] By substituting the air pressure and air flow rate at several time points into the air pressure change rate and air flow rate change rate of the first pressurized building, the derivative values of the air pressure change function with time and the air flow rate change function with time at each time point are obtained.
[0111] The net pressurization volume of the pressurized building at each time point is obtained by using the derivative of the function of air pressure changing with time and the derivative of the function of air flow changing with time.
[0112] The average value of the pressurized net volume of the pressurized building at each time point is taken as the net space of the pressurized building.
[0113] In some embodiments of this application, by The net pressurized volume V of the pressurized building at each time point is obtained, where, The first pressurized building air pressure change rate, R is the rate of change of airflow, T is the molar gas constant, T is the gas temperature inside the pressurized building, t is time, Q is the air volume of the pressurized building converted to ambient air pressure, P is the air pressure inside the pressurized building, P1 is the ambient air pressure, and P0 is the standard atmosphere.
[0114] In some embodiments of this application, the data fitting module 202 is used for:
[0115] After the indoor air pressure is increased to the second air pressure, the pressurized building interior air pressure after the increase to the second air pressure is obtained;
[0116] The internal air pressure of the pressurized building after increasing to the second air pressure was fitted to obtain a function of the air pressure of the pressurized building after increasing to the second air pressure as a function of time.
[0117] The rate of change of the second pressurized building air pressure is obtained by differentiating the function of the pressurized building air pressure with time after it is increased to the second air pressure.
[0118] In some embodiments, the leakage calculation module 203 is used for
[0119] Depend on The leakage rate of the pressurized building under any air pressure is obtained, where, denoted as the pressure change rate of the second pressurized building, P′ as the internal pressure of the pressurized building, R as the molar gas constant, T as the internal gas temperature of the pressurized building, t as time, V′ as the net space of the pressurized building, P1 as the ambient pressure, P0 as the standard atmospheric pressure, and Q′ as the air volume of the pressurized building converted to ambient pressure.
[0120] In some embodiments, the leakage calculation module 203 is used to obtain the building unit volume leakage rate by dividing the leakage of the pressurized building under any air pressure by the standard building volume; and to determine the airtightness of the pressurized building by comparing the building unit volume leakage rate with a preset index.
[0121] Thirdly, this application also provides a testing system, please refer to [link / reference needed]. Figure 3 , Figure 3 This is a schematic diagram of the test system provided in an embodiment of this application. The test system includes: a pressurization device 2, a volumetric flow meter 3, an electric valve 4, a pressure transmitter 5, a control module, and the aforementioned test equipment for quantifying the airtightness of pressurized buildings;
[0122] The control module is connected to the booster device 2, the volumetric flow meter 3, the electric valve 4, and the pressure transmitter 5 respectively;
[0123] In this embodiment, the control module may be a terminal device or a server.
[0124] In this application embodiment, when the control module is a server, the server can be an independent server, a server network, or a server cluster. For example, the server described in this application embodiment includes, but is not limited to, a computer, a network host, a single network server, a set of multiple network servers, or a cloud server composed of multiple servers. The cloud server is composed of a large number of computers or network servers based on cloud computing. In this application embodiment, the server and client can communicate through any communication method, including but not limited to mobile communication based on the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE), and Worldwide Interoperability for Microwave Access (WiMAX), or computer network communication based on the TCP / IP Protocol Suite (TCP / IP) and User Datagram Protocol (UDP).
[0125] It is understood that when the control module used in the embodiments of this application is a terminal device, the terminal device can be a device that includes both receiving hardware and transmitting hardware, that is, a device with receiving and transmitting hardware capable of performing bidirectional communication on a bidirectional communication link. Such a terminal device may include: cellular or other communication devices, which have a single-line display, a multi-line display, or a cellular or other communication device without a multi-line display. Specifically, the control module may be a desktop terminal or a mobile terminal, and the control module may be one of a mobile phone, tablet computer, laptop computer, etc.
[0126] The terminal devices involved in the embodiments of this application can also be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. Examples include mobile phones (or "cellular" phones) and computers with mobile terminals, such as portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with a wireless access network. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and other devices.
[0127] In this embodiment of the application, the determination of the net volume of the pressurized building using a testing system includes:
[0128] 1) The control module simultaneously activates the booster device 2 and the electric valve 4 to boost the pressure of the building 1;
[0129] 2) The control module records the data of volumetric flow meter 3 and pressure transmitter 5 in real time. The data recording time step is 1 second to 1 minute. When the value of pressure transmitter 5 is greater than or equal to 100 Pa, the recording stops.
[0130] 3) Fit the data recorded by volumetric flow meter 3 and pressure transmitter 5 to obtain the flow rate as a function of time Q(t) and the first air pressure as a function of time P(t);
[0131] 4) Differentiate the flow rate function Q(t) and the first air pressure function P(t) with respect to time t to obtain the derivative functions. and
[0132] 5) Select three time points (t1, t2, t3) and substitute them into the derivative function respectively. Find the value in the middle, and then use the formula. They are respectively designated as V1, V2, and V3;
[0133] 6) Take the average value V' represents the net space of the pressurized building.
[0134] Where P is the internal air pressure of the pressurized building, R is the molar gas constant, T is the internal gas temperature of the pressurized building, t is time, V is the net pressurized volume of the pressurized building, P1 is the ambient air pressure, P0 is the standard atmospheric pressure, and Q is the air volume of the pressurized building when converted to ambient air pressure.
[0135] In this embodiment of the invention, the calculation of the leakage of the pressurized building includes:
[0136] 1) The control module activates the booster device 2 and the electric valve 4;
[0137] 2) The indoor air pressure of pressurized building 1 is increased to the target air pressure, and the electric valve 4 and pressurization equipment 2 are closed at the same time;
[0138] 3) The control module records the data of pressure transmitter 5 in real time. The data recording time step is 2s to 1min. Recording stops when the value of pressure transmitter 5 is less than or equal to 10kPa.
[0139] 4) Fit the data recorded by pressure transmitter 5 to obtain the function P′(t) of the change of pressurized building air pressure with time;
[0140] 5) Differentiate the function P′(t) of the building air pressure over time with respect to time t to obtain the derivative function.
[0141] 6) According to the formula Calculate the leakage of a pressurized building under any pressure.
[0142] Where P′ is the internal air pressure of the pressurized building, R is the molar gas constant, T is the internal gas temperature of the pressurized building, t is time, V′ is the net space of the pressurized building, P1 is the ambient air pressure, P0 is the standard atmospheric pressure, and Q′ is the air volume of the pressurized building when converted to ambient air pressure.
[0143] Fourthly, embodiments of this application also provide a computer device, such as... Figure 4 As shown, it illustrates a structural schematic diagram of the computer device involved in the embodiments of this application, specifically:
[0144] The computer device may include components such as a processor 401 with one or more processing cores, a memory 402 with one or more computer-readable storage media, a power supply 403, and an input unit 404. Those skilled in the art will understand that... Figure 4 The computer device structure shown does not constitute a limitation on the computer device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:
[0145] The processor 401 is the control center of the computer device. It connects various parts of the computer device via various interfaces and lines, and performs various functions and processes data by running or executing software programs and / or modules stored in the memory 402, and by calling data stored in the memory 402, thereby providing overall monitoring of the computer device. Optionally, the processor 401 may include one or more processing cores; preferably, the processor 401 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operation of the storage medium, user interface, and application programs, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 401.
[0146] The memory 402 can be used to store software programs and modules. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402. The memory 402 may mainly include a program storage area and a data storage area. The program storage area may store applications required for operating the storage medium and at least one function (such as sound playback function, image playback function, etc.); the data storage area may store data created according to the use of the computer device. In addition, the memory 402 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 402 may also include a controller to provide the processor 401 with access to the memory 402.
[0147] The computer device also includes a power supply 403 that supplies power to the various components. Preferably, the power supply 403 can be logically connected to the processor 401 via a power management storage medium, thereby enabling functions such as charging, discharging, and power consumption management through the power management storage medium. The power supply 403 may also include one or more DC or AC power supplies, recharge storage media, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.
[0148] The computer device may also include an input unit 404, which can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
[0149] Although not shown, the computer device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 401 in the computer device loads the executable files corresponding to the processes of one or more applications into the memory 402 according to the following instructions, and the processor 401 runs the applications stored in the memory 402, thereby implementing the steps in the above-described test method embodiment.
[0150] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.
[0151] Therefore, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to execute the steps in any of the testing methods provided in embodiments of this application.
[0152] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.
[0153] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.
[0154] Since the computer program stored in the computer-readable storage medium can execute the steps in any of the test methods provided in the embodiments of this application, the beneficial effects that any of the test methods provided in the embodiments of this application can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.
[0155] The foregoing has provided a detailed description of a test method, test equipment, system, computer equipment, and medium for quantifiable pressurized building airtightness provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A test method for quantifiable pressurized building airtightness, characterized in that, include: The net space of the pressurized building is obtained by measuring the rate of change of airflow and the rate of change of air pressure in the first pressurized building during the process of pressurizing the pressurized building to the first air pressure. The internal air pressure of the pressurized building after pressurization to the second air pressure is obtained, and the change rate of the second pressurized building air pressure is obtained by fitting the internal air pressure. The leakage of the pressurized building under any pressure is obtained based on the net space of the pressurized building and the pressure change rate of the second pressurized building. The leakage rate per unit volume of the pressurized building is obtained based on the leakage amount of the pressurized building under any air pressure, and the air tightness of the pressurized building is judged based on the leakage rate per unit volume of the pressurized building.
2. The test method according to claim 1, characterized in that, The determination of the airflow change rate and the first pressurized building air pressure change rate to obtain the pressurized building net space includes: Obtain the internal air pressure and volume of the pressurized building; The air pressure inside the pressurized building is fitted to obtain a function of air pressure changing with time; The air volume inside the pressurized building is fitted to obtain a function of airflow rate changing with time; The net space of the pressurized building is obtained based on the functions of air pressure and air flow rate over time.
3. The test method according to claim 2, characterized in that, The net space of the pressurized building, obtained based on the functions of air pressure and airflow over time, includes: The pressure change function and the air flow rate change function are respectively differentiated with respect to time to obtain the pressure change rate and the air flow rate change rate of the first pressurized building. By substituting the air pressure and air flow rate at several time points into the air pressure change rate and air flow rate change rate of the first pressurized building, the derivative values of the air pressure change function with time and the air flow rate change function with time corresponding to each time point are obtained. Based on the derivative values of the air pressure change function over time and the air flow rate change function over time at each time point, the pressurized net volume of the pressurized building at each time point is obtained. The average value of the pressurized net volume of the pressurized building at each time point is taken as the net space of the pressurized building.
4. The test method according to claim 3, characterized in that, Depend on Obtain the net pressurization volume of the pressurized building at each time point. ,in, The first pressurized building air pressure change rate, The rate of change of airflow. The molar gas constant, To increase the temperature of the gas inside the building, For time, The volume of pressurized building air converted to ambient air pressure. To increase the air pressure inside the building, For ambient air pressure, Standard atmospheric pressure.
5. The test method according to any one of claims 1 to 4, characterized in that, The process of obtaining the internal air pressure of the pressurized building after pressurization to the second air pressure, and fitting the internal air pressure to obtain the air pressure change rate of the second pressurized building, includes: After the indoor air pressure is increased to the second air pressure, the pressurized building interior air pressure after the increase to the second air pressure is obtained; The internal air pressure of the pressurized building after being increased to the second air pressure is fitted to obtain a function of the air pressure of the pressurized building after being increased to the second air pressure as a function of time. The rate of change of the second pressurized building air pressure is obtained by differentiating the function of the pressurized building air pressure with respect to time after it has been increased to the second air pressure.
6. The test method according to claim 5, characterized in that, The step of obtaining the leakage of the pressurized building at any pressure based on the net space of the pressurized building and the pressure change rate of the second pressurized building includes: Depend on The leakage rate of the pressurized building under any air pressure is obtained, where, The second pressurized building air pressure change rate, To increase the air pressure inside the building, molar gas constant, To increase the temperature of the gas inside the building, For time, To increase the building's net space, For ambient air pressure, Standard atmospheric pressure The volume of pressurized building air converted to ambient air pressure.
7. A testing device for quantifying the airtightness of pressurized buildings, characterized in that, include: The pressurization net space calculation module is used to obtain the pressurization building net space by measuring the air flow rate change rate and the first pressurization building air pressure change rate during the process of pressurizing the pressurization building to the first air pressure. The data fitting module is used to obtain the internal air pressure of the pressurized building after it is pressurized to the second air pressure, and to fit the internal air pressure to obtain the air pressure change rate of the second pressurized building. The leakage calculation module is used to obtain the leakage of the pressurized building under any pressure based on the net space of the pressurized building and the pressure change rate of the second pressurized building. The air tightness calculation module is used to obtain the unit volume leakage rate of the pressurized building based on the leakage amount of the pressurized building under any air pressure, and to determine the air tightness of the pressurized building based on the unit volume leakage rate of the pressurized building.
8. A test system for quantifying the airtightness of pressurized buildings, characterized in that, include: The booster equipment, volumetric flow meter, electric valve, pressure transmitter, control module, and the test equipment for quantifying the airtightness of a booster building as described in claim 7; The control module is connected to the pressurizing equipment, the volumetric flow meter, the electric valve, and the pressure transmitter respectively. It is used to control the pressurizing equipment and the electric valve to pressurize the pressurizing building, and after pressurizing the pressurizing building to the first air pressure, it controls the volumetric flow meter to measure the air flow and the pressure transmitter to measure the air pressure of the pressurizing building. The test equipment for quantifying the airtightness of the pressurized building is used to measure the rate of change of airflow and the rate of change of air pressure in the first pressurized building to obtain the net space of the pressurized building. The internal air pressure of the pressurized building after pressurization to the second air pressure is obtained, and the pressure change rate of the second pressurized building is obtained by fitting the internal air pressure; the leakage of the pressurized building under any air pressure is obtained based on the net space of the pressurized building and the pressure change rate of the second pressurized building. The leakage rate per unit volume of the pressurized building is obtained based on the leakage amount of the pressurized building under any air pressure, and the air tightness of the pressurized building is judged based on the leakage rate per unit volume of the pressurized building.
9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.