Test method, test equipment and system capable of quantizing air tightness of supercharged building, computer equipment and medium

Abstract

The invention discloses a test method, test equipment and system capable of quantizing air tightness of a pressurized building, computer equipment and a medium, and relates to the technical field of air tightness test of pressurized buildings. The test method comprises the following steps: after pressurizing a pressurized building to a first air pressure, measuring an air flow change rate and a first pressurized building air pressure change rate to obtain a pressurized building clear space; the internal air pressure of the pressurizing building pressurized to the second air pressure is obtained, and fitting is conducted on all the internal air pressure to obtain the air pressure change rate of the second pressurizing building; according to the clean space of the pressurized building and the air pressure change rate of the second pressurized building, the leakage rate of the pressurized building under any air pressure is obtained; the unit volume leakage rate of the supercharged building is obtained based on the leakage rate of the supercharged building under any air pressure, and the airtightness of the supercharged building is judged based on the unit volume leakage rate of the supercharged building. According to the invention, the limitation of the existing pressurization building air tightness test can be overcome.

Description

Technical Field

[0001] The present application relates to the technical field of pressurized building air tightness testing, and in particular to a test method, test equipment, system, computer equipment and medium capable of quantifying the air tightness of a pressurized building. Background Art

[0002] The pressure difference between the indoor and outdoor of a pressurized building is more than 10kPa, which requires the building to have extremely high air tightness. However, the development of pressurized buildings is still in its early stages, and a complete standard system has not yet been established, and there is a lack of technical guidance for air tightness testing. The air tightness measurement method currently used by engineering and technical personnel is: use the pressurization equipment to increase the indoor air pressure of the pressurized building to the design air pressure and then stop pressurizing, and use the air pressure change rate after one hour as the air tightness data of the pressurized building. For example, the design air pressure of a pressurized building project is 30KPa. After the pressurization is increased to 30KPa, the pressurization is stopped. Due to leakage, the building pressure becomes 27KPa after one hour, and the air pressure drops by 10%. The air tightness of the pressurized building is recorded as 10% / h.

[0003] In the prior art, technicians have explored the air tightness detection of enclosed spaces and patented an intelligent pressure-bearing building air tightness identification device, which can start the air pressurization system through a controller to send the outside air into the pressure-bearing building after pressurization and temperature increase or constant temperature pressurization. When the indoor air reaches the set value or the air pressure is stable, the mobile carrier and the infrared imager are started by the controller to complete the heat leakage detection of the joints between the wall panels of the pressure-bearing building.

[0004] The patent discloses a method and device for quantitatively monitoring the air tightness of a confined space, which first measures the time-dependent change PI(t) of the air pressure inside the confined space and / or the time-dependent change PD(t) of the air pressure difference between the outside and inside of the confined space; and then calculates the air tightness quantitative value S of the confined space according to the time change rate of PI(t) and / or PD(t), where S is proportional to the time change rate of PI(t) and S is inversely proportional to PD(t). This method can give a quantitative value of the degree of air tightness.

[0005] However, the existing air tightness measurement methods have shortcomings. For example, the use of inert gas to measure the air tightness of a confined space is not suitable for large-volume confined spaces; the infrared heat leakage detection method is convenient for detecting small-volume products or large-volume products under manufacturing, but it is difficult to judge products that have been installed on site through infrared detection; the air tightness of a confined space is detected by the change in air pressure, but this detection method is not accurate enough in judging the air tightness detection, forming a general judgment indicator.

[0006] In the process of increasing space, the existing air tightness test method directly ignores the volume of pressurized buildings. Take pressurized buildings with volumes of 5,000 cubic meters and 50 cubic meters as examples. Assuming that due to leakage, the indoor air pressure of both buildings drops from 30Kpa to 27Kpa in one hour, and the air pressure decreases by 10%. Obviously, the total amount of leakage of the 5,000 cubic meter pressurized building is much greater than that of the 50 cubic meter pressurized building. Because of leakage, the building needs to be pressurized, but the existing air tightness data cannot provide a basis for the design of building pressure replenishment.

[0007] The amount of judgment data is single. The existing measurement method can only give the data measured under a certain pressure. When the pressurized building is in operation, the indoor pressure will be adjusted according to actual needs. For example, the data of a pressurized building under 30Kpa is measured, but the actual operation of the building may be at 25kPa or 35Kpa. The airtightness data of these two air pressure points is missing, and the error caused by the difference in the location of the pressure measurement point cannot be reduced. Summary of the invention

[0008] The embodiments of the present application provide a test method, test equipment, system, computer equipment and medium that can quantify the air tightness of a pressurized building, which are used to improve the limitations of existing air tightness measurement methods.

[0009] In a first aspect, the present application provides a test method for quantifying the air tightness of a pressurized building, comprising:

[0010] After the pressurized building is pressurized to a first air pressure, the air flow rate change rate and the first pressurized building air pressure change rate are measured to obtain the pressurized building net space;

[0011] Acquire the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fit the internal air pressure to obtain the second pressurized building air pressure change rate;

[0012] Obtaining the leakage amount of the pressurized building at any air pressure according to the net space of the pressurized building and the air 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 determined based on the leakage rate per unit volume of the pressurized building.

[0014] In some embodiments, determining the air flow rate change rate and the first pressurized building air pressure change rate to obtain the pressurized building net space includes:

[0015] Obtain the internal air pressure and internal air volume of the pressurized building;

[0016] Fitting the internal air pressure of the pressurized building to obtain a function of air pressure changing with time;

[0017] Fitting the air volume inside the pressurized building to obtain a function of air flow rate changing over time;

[0018] Based on the function of the air pressure changing with time and the function of the air flow changing with time, the pressurized building net space is obtained.

[0019] In some embodiments, obtaining the pressurized building net space based on the function of the air pressure changing over time and the function of the air flow changing over time includes:

[0020] Derivatives of the function of the air pressure changing with time and the function of the air flow changing with time with respect to time are respectively obtained to obtain the air pressure change rate and the air flow change rate of the first pressurized building;

[0021] Select the air pressure and air flow at several time points and substitute them into the air pressure change rate and the air flow change rate of the first pressurized building respectively, to obtain the derivative function value of the air pressure change function over time and the derivative function value of the air flow change function over time corresponding to each time point;

[0022] The pressurized net volume of the pressurized building corresponding to each time point is obtained based on the derivative function value of the air pressure changing with time function and the derivative function value of the air flow changing with time function corresponding to each time point;

[0023] The average value of the pressurized net volume of the pressurized building corresponding to each time point is taken as the net space of the pressurized building.

[0024] In some embodiments, The net pressurized volume V of the pressurized building corresponding to each time point is obtained, where: is the air pressure change rate of the first pressurized building, is the air flow rate change rate, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the time, Q is the air volume of the pressurized building when the air is converted to the ambient pressure, P is the air pressure inside the pressurized building, P1 is the ambient pressure, and P0 is the standard atmospheric pressure.

[0025] In some embodiments, obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fitting the internal air pressure to obtain the second pressurized building air pressure change rate includes:

[0026] After the air pressure in the control room is increased to the second air pressure, the air pressure inside the pressurized building after the air pressure is increased to the second air pressure is obtained;

[0027] Fitting the internal air pressure of the pressurized building after the air pressure is increased to the second air pressure to obtain a function of the change of the air pressure of the pressurized building after the air pressure is increased to the second air pressure over time;

[0028] The second pressurized building air pressure change rate is obtained by taking the derivative of the function of the pressurized building air pressure after the pressurized building air pressure is increased to the second air pressure and changing with time.

[0029] In some embodiments, obtaining the leakage amount of the pressurized building at any air pressure according to the net space of the pressurized building and the air pressure change rate of the second pressurized building includes:

[0030] Depend on Get the leakage of the pressurized building under any air pressure, where is the rate of change of air pressure in the second pressurized building, P′ is the air pressure inside the pressurized building, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the 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 the air is converted to the ambient air pressure.

[0031] In a second aspect, the present application provides a test device capable of quantifying the air tightness of a pressurized building, comprising:

[0032] A pressurized net space calculation module is used to obtain the pressurized building net space by measuring the air flow rate change rate and the first pressurized building air pressure change rate after pressurizing the pressurized building to a first air pressure;

[0033] A data fitting module, used for obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fitting the internal air pressure to obtain the second pressurized building air pressure change rate;

[0034] A leakage calculation module, used for obtaining the leakage of the pressurized building under any air pressure according to the net space of the pressurized building and the air pressure change rate of the second pressurized building;

[0035] The airtightness calculation module is used to obtain the leakage rate per unit volume of the pressurized building based on the leakage amount of the pressurized building under any air pressure, and to judge the airtightness of the pressurized building based on the leakage rate per unit volume of the pressurized building.

[0036] In a third aspect, the present application provides a test system capable of quantifying the air tightness of a pressurized building, comprising: a pressurizing device, a volume flow meter, an electric valve, a pressure transmitter, a control module, and the test device capable of quantifying the air tightness of a pressurized building;

[0037] The control module is connected to the boosting device, the volume flow meter, the electric valve and the pressure transmitter respectively, and is used to control the boosting device and the electric valve to boost the boosted building, and after the boosted building is boosted to the first air pressure, control the volume flow meter to measure the air flow and the pressure transmitter to measure the air pressure of the boosted building;

[0038] The test equipment capable of quantifying the air tightness of a pressurized building is used to measure the air flow rate change rate and the first pressurized building air pressure change rate to obtain the net space of the pressurized building; obtain the internal air pressure of the pressurized building after being pressurized to a second air pressure, and fit the internal air pressure to obtain the second pressurized building air pressure change rate; obtain the leakage of the pressurized building at any air pressure based on the net space of the pressurized building and the second pressurized building air pressure change rate; obtain the leakage rate per unit volume of the pressurized building based on the leakage rate of the pressurized building at any air pressure, and judge the air tightness of the pressurized building based on the leakage rate per unit volume of the pressurized building.

[0039] In a fourth aspect, the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the above methods when executing the computer program.

[0040] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of any of the above methods when executed by a processor.

[0041] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0042] 1. Introduce the net volume index of the pressurized building. By measuring the air flow rate 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 net volume of internal pressurization of the building and the pressure change rate, the pressure difference change rate of the standard volume is obtained, which makes the comparison more standard, provides a basis for the design of building pressure compensation, and has higher data value. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 It is a schematic diagram of a test method for quantifiable pressurized building air tightness provided in an embodiment of the present application;

[0046] Figure 2 It is a schematic diagram of a test device capable of quantifying the air tightness of a pressurized building provided in an embodiment of the present application;

[0047] Figure 3Schematic diagram of a test system for quantifying pressurized building air tightness provided in an embodiment of the present application;

[0048] Figure 4 It is a schematic diagram of the structure of an embodiment of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0050] In the following description, the specific embodiments of the present application will be described with reference to the steps and symbols performed by one or more computers, unless otherwise specified. Therefore, these steps and operations will be mentioned several times as being performed by a computer, and the computer execution referred to herein includes the operation of a computer processing unit by an electronic signal representing data in a structured form. This operation converts the data or maintains it at a location in the memory system of the computer, which can be reconfigured or otherwise change the operation of the computer in a manner familiar to testers in the field. The data structure maintained by the data is a physical location in the memory, which has specific characteristics defined by the data format. However, the principles of the present application are described in the above text, which does not represent a limitation, and testers in the field will understand that the following various steps and operations can also be implemented in hardware.

[0051] The term "module" or "unit" used in this article can be regarded as a software object executed on the computing system. The different components, modules, engines and services in this article can be regarded as implementation objects on the computing system. The apparatus and method in this article are preferably implemented in software, but can also be implemented in hardware, all within the scope of protection of this application.

[0052] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to 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 refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other elements, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0053] First, the principle of quantitative pressurized building airtightness of this application is explained:

[0054] According to the gas state equation:

[0055] PV=nRT (1)

[0056] During the building pressurization process, the indoor temperature of the building changes little, and the effect of temperature on pressure is ignored. In addition, the volume of the pressurized net space is constant during the process, so:

[0057]

[0058] Calculate the amount of gaseous substance:

[0059]

[0060] From formula (2) and (3), we can get:

[0061]

[0062] Formula (4) can be transformed into:

[0063]

[0064] Among them, P is the internal air pressure of the pressurized building, n is the amount of gas substance inside the pressurized building, R is the molar gas constant, T is the internal gas temperature of the pressurized building, t is the time, Q is the air volume of the pressurized building when the air is converted to the 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] The net pressurized volume of a pressurized building in this application refers to the space after deducting the non-compressible substances that occupy the gas space inside the building, including partitions, furniture and appliances, etc. The space occupied by such substances does not participate in the pressure increase or decrease of the building.

[0066] It can be seen from formula (5) that the leakage of a pressurized building at a certain air pressure can be determined by measuring the rate of change of air pressure over time. But the prerequisite is to know the net space of the pressurized building. After the building is completed, it is impossible to directly obtain the accurate net space through the drawings because there are a lot of decorations, home appliances and equipment inside.

[0067] In order to obtain the accurate net space of the pressurized building, the following method is used:

[0068] Formula (4) can be transformed into:

[0069]

[0070] It can be seen from formula (6) that by pressurizing the pressurized building, the air flow rate is measured and the rate of change of pressure in pressurized buildings After the two parameters are calculated, the net space of the pressurized building can be obtained. Because the pressurized building will have obvious leakage under a large pressure difference, the net space should be measured under a small pressure difference between indoors and outdoors. Combined with field experience, it is believed that the pressure difference between the inside and outside of the pressurized building should be less than 100Pa during the test.

[0071] See also Figure 1 , Figure 1 A test method for quantifying the air tightness of a pressurized building provided in an embodiment of the present application includes:

[0072] 101: After pressurizing the pressurized building to a first air pressure, measuring an air flow rate change rate and a first pressurized building air pressure change rate to obtain a net space of the pressurized building;

[0073] 102: Obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fitting the internal air pressure to obtain the air pressure change rate of the second pressurized building;

[0074] 103: Obtain the leakage amount of the pressurized building under any air pressure according to the net space of the pressurized building and the air pressure change rate of the second pressurized building;

[0075] 104: Obtaining a unit volume leakage rate of the pressurized building based on the leakage amount of the pressurized building at any air pressure, and determining the air tightness of the pressurized building based on the unit volume leakage rate of the pressurized building.

[0076] In another specific example, determining the air flow rate change rate and the first pressurized building air pressure change rate to obtain the pressurized building net space includes:

[0077] Obtain the internal air pressure and internal air volume of the pressurized building;

[0078] Fitting the internal air pressure of the pressurized building to obtain the function of air pressure changing with time;

[0079] Fitting the air volume inside the pressurized building to obtain a function of the air flow rate changing with time;

[0080] Based on the function of the air pressure changing with time and the function of the air flow changing with time, the pressurized building net space is obtained.

[0081] In another specific example, the pressurized building net space is obtained based on a function of air pressure changing over time and a function of air flow changing over time, including:

[0082] The function of the change of air pressure with time and the function of the change of air flow with time are respectively differentiated with respect to time to obtain the change rate of air pressure and the change rate of air flow of the first pressurized building;

[0083] Select the air pressure and air flow at several time points and substitute them into the air pressure change rate and air flow change rate of the first pressurized building respectively, to obtain the derivative function value of the air pressure change function over time and the derivative function value of the air flow change function over time corresponding to each time point;

[0084] The pressurized net volume of the pressurized building corresponding to each time point is obtained based on the derivative value of the air pressure changing with time function and the derivative value of the air flow changing with time function corresponding to each time point;

[0085] The average value of the pressurized net volume of the pressurized building corresponding to 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 corresponding to each time point is obtained, where: is the air pressure change rate of the first pressurized building, is the air flow rate change rate, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the time, Q is the air volume of the pressurized building when the air is converted to the ambient pressure, P is the air pressure inside the pressurized building, P1 is the ambient pressure, and P0 is the standard atmospheric pressure.

[0087] In another specific example, obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fitting the internal air pressure to obtain the second pressurized building air pressure change rate includes:

[0088] After the air pressure in the control room is increased to the second air pressure, the air pressure inside the pressurized building after the air pressure is increased to the second air pressure is obtained;

[0089] Fitting the internal air pressure of the pressurized building after the air pressure is increased to the second air pressure, and obtaining a function of the change of the air pressure of the pressurized building after the air pressure is increased to the second air pressure over time;

[0090] The second pressurized building air pressure change rate is obtained by taking the derivative of the function of the pressurized building air pressure changing with time after the pressurized building air pressure is increased to the second air pressure.

[0091] In another specific example, the leakage amount of the pressurized building under any air pressure is obtained according to the net space of the pressurized building and the air pressure change rate of the second pressurized building, including:

[0092] Depend on Get the leakage of the pressurized building under any air pressure, where is the rate of change of air pressure in the second pressurized building, P′ is the air pressure inside the pressurized building, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the 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 the air is converted to the ambient air pressure.

[0093] In another specific example, obtaining a unit volume leakage rate of the pressurized building based on the leakage amount of the pressurized building at any air pressure, and judging the air tightness of the pressurized building based on the unit volume leakage rate of the pressurized building includes:

[0094] The leakage rate per unit volume of the building is obtained by dividing the leakage of the pressurized building at any air pressure by the standard volume of the building;

[0095] The air tightness of the pressurized building is determined by comparing the leakage rate per unit volume of the building with the preset indicators.

[0096] For example, when the unit volume leakage rate of the building is not less than the preset index, it is considered that the air tightness of the pressurized building is low. When the unit volume leakage rate of the building is less than the preset index, it is considered that the air tightness of the pressurized building is high. The preset index size can be adjusted according to the standard volume of the pressurized building or the application environment, and the embodiment of the present invention does not limit it uniquely.

[0097] In the second aspect, in order to facilitate better implementation of the test method provided in the embodiment of the present application, the embodiment of the present application also provides a test device based on the above test method. The meanings of the terms are the same as those in the above test method, and the specific implementation details can refer to the description in the method embodiment.

[0098] See also Figure 2 , Figure 2 A schematic diagram of the structure of a test device provided in an embodiment of the present application, wherein the test device 200 may include a pressurized net space calculation module 201, a data fitting module 202, a leakage calculation module 203 and an airtightness calculation module 204, wherein:

[0099] A pressurized net space calculation module 201 is used to obtain the pressurized building net space by measuring the air flow rate change rate and the first pressurized building air pressure change rate after pressurizing the pressurized building to a first air pressure;

[0100] A data fitting module 202 is used to obtain the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and to fit the internal air pressure to obtain a change rate of the second pressurized building air pressure;

[0101] The leakage calculation module 203 is used to obtain the leakage of the pressurized building under any air pressure according to the net space of the pressurized building and the air pressure change rate of the second pressurized building;

[0102] The airtightness calculation module 204 is used to obtain the leakage rate per unit volume of the pressurized building based on the leakage amount of the pressurized building under any air pressure, and to determine the airtightness of the pressurized building based on the leakage rate per unit volume of the pressurized building.

[0103] In some embodiments of the present application, the pressurized net space calculation module 201 is used to:

[0104] Obtain the internal air pressure and internal air volume of the pressurized building;

[0105] Fitting the internal air pressure of the pressurized building to obtain the function of air pressure changing with time;

[0106] Fitting the air volume inside the pressurized building to obtain a function of the air flow rate changing with time;

[0107] Based on the function of air pressure changing with time and the function of air flow changing with time, the pressurized building net space is obtained.

[0108] In some embodiments of the present application, the pressurized net space calculation module 201 is further used to:

[0109] The function of the change of air pressure with time and the function of the change of air flow with time are respectively differentiated with respect to time to obtain the change rate of air pressure and the change rate of air flow of the first pressurized building;

[0110] Select the air pressure and air flow at several time points and substitute them into the air pressure change rate and air flow change rate of the first pressurized building respectively, to obtain the derivative function value of the air pressure change function over time and the derivative function value of the air flow change function over time corresponding to each time point;

[0111] The pressurized net volume of the pressurized building corresponding to each time point is obtained based on the derivative value of the air pressure changing with time function and the derivative value of the air flow changing with time function corresponding to each time point;

[0112] The average value of the pressurized net volume of the pressurized building corresponding to each time point is taken as the net space of the pressurized building.

[0113] In some embodiments of the present application, The net pressurized volume V of the pressurized building corresponding to each time point is obtained, where: is the air pressure change rate of the first pressurized building, is the air flow rate change rate, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the time, Q is the air volume of the pressurized building when the air is converted to the ambient pressure, P is the air pressure inside the pressurized building, P1 is the ambient pressure, and P0 is the standard atmospheric pressure.

[0114] In some embodiments of the present application, the data fitting module 202 is used to:

[0115] After the air pressure in the control room is increased to the second air pressure, the air pressure inside the pressurized building after the air pressure is increased to the second air pressure is obtained;

[0116] Fitting the internal air pressure of the pressurized building after the air pressure is increased to the second air pressure, and obtaining a function of the change of the air pressure of the pressurized building after the air pressure is increased to the second air pressure over time;

[0117] The second pressurized building air pressure change rate is obtained by differentiating the function of the pressurized building air pressure changing with time after the air pressure is increased to the second air pressure.

[0118] In some embodiments, the leakage calculation module 203 is used to

[0119] Depend on Get the leakage of the pressurized building under any air pressure, where is the rate of change of air pressure in the second pressurized building, P′ is the air pressure inside the pressurized building, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the 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 the air is converted to the ambient air pressure.

[0120] In some embodiments, the leakage calculation module 203 is used to obtain the leakage rate per unit volume of the pressurized building by dividing the leakage rate of the pressurized building at any air pressure by the standard volume of the building; and compare the leakage rate per unit volume of the building with a preset index to determine the air tightness of the pressurized building.

[0121] In a third aspect, the present application also provides a testing system, see Figure 3 , Figure 3 A schematic diagram of the structure of the test system provided in the embodiment of the present application. The test system includes: a pressurizing device 2, a volume flow meter 3, an electric valve 4, a pressure transmitter 5, a control module and the above-mentioned test equipment capable of quantifying the air tightness of a pressurized building;

[0122] The control module is respectively connected with the boosting device 2, the volume flow meter 3, the electric valve 4 and the pressure transmitter 5;

[0123] In the embodiment of the present application, the control module may be a terminal device or a server.

[0124] In the embodiment of the present application, when the control module is a server, the server can be an independent server, or a server network or server cluster composed of servers, for example, the server described in the embodiment of the present application includes but is not limited to a computer, a network host, a single network server, a plurality of network server sets or a cloud server composed of a plurality of servers. Wherein, the cloud server is composed of a large number of computers or network servers based on cloud computing (Cloud Computing). In the embodiment of the present application, communication between the server and the client can be achieved by any communication method, including but not limited to, mobile communications based on the third generation partnership project (3rd Generation Partnership Project, 3GPP), long term evolution (Long Term Evolution, LTE), Worldwide Interoperability for Microwave Access (Worldwide Interoperability for Microwave Access, WiMAX), or computer network communications based on TCP / IP protocol suite (TCP / IP Protocol Suite, TCP / IP), user datagram protocol (User Datagram Protocol, UDP) protocol, etc.

[0125] It is understandable that when the control module used in the embodiment of the present 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 that can perform two-way communication on a two-way communication link. Such terminal devices may include: cellular or other communication devices, which have a single-line display or a multi-line display or a cellular or other communication device without a multi-line display. The specific control module can be a desktop terminal or a mobile terminal, and the control module can be one of a mobile phone, a tablet computer, a laptop computer, etc.

[0126] The terminal device involved in the embodiments of the present application may also refer to a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. For example, a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges voice and / or data with a wireless access network. For example, a personal communication service (English full name: Personal Communication Service, English abbreviation: PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (Wireless Local Loop, English abbreviation: WLL) station, a personal digital assistant (English full name: Personal Digital Assistant, English abbreviation: PDA) and other devices.

[0127] In the embodiment of the present application, the determination of the net volume of the pressurized building by the test system includes:

[0128] 1) The control module simultaneously turns on the boosting device 2 and the electric valve 4 to boost the pressure of the additional building 1;

[0129] 2) The control module records the data of the volume flow meter 3 and the pressure transmitter 5 in real time, and the data recording time step is 1s to 1min. When the value of the pressure transmitter 5 is greater than or equal to 100Pa, the recording is stopped;

[0130] 3) Fitting the data recorded by the volume flow meter 3 and the pressure transmitter 5 to obtain the flow rate versus time function Q(t) and the first air pressure versus time function P(t);

[0131] 4) The flow rate time function Q(t) and the first pressure time function P(t) are derived with respect to time t to obtain the derivative function and

[0132] 5) Select three time points (t1, t2, t3) and substitute them into the derivative function respectively Then, through the formula They are counted as V1, V2, and V3 respectively;

[0133] 6) Take the average V' is the net space of the pressurized building.

[0134] Wherein, 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 the 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 the air is converted to the ambient air pressure;

[0135] In an embodiment of the present invention, the calculation of the leakage amount of the pressurized building includes:

[0136] 1) The control module turns on the boost device 2 and the electric valve 4;

[0137] 2) The indoor air pressure of the pressurized building 1 is increased to the target air pressure, and the electric valve 4 and the pressurizing device 2 are closed at the same time;

[0138] 3) The control module records the data of the pressure transmitter 5 in real time, and the data recording time step is 2s to 1min. When the value of the pressure transmitter 5 is less than or equal to 10kPa, the recording stops;

[0139] 4) Fitting the data recorded by the pressure transmitter 5 to obtain the function P′(t) of the pressure change of the pressurized building air pressure over time;

[0140] 5) The function P′(t) of the building air pressure changing with time is differentiated with respect to time t to obtain the derivative function

[0141] 6) According to the formula Calculate leakage from a pressurized building at any air pressure.

[0142] Wherein, 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 the 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 the air is converted to the ambient air pressure.

[0143] In a fourth aspect, the present application also provides a computer device, such as Figure 4 As shown, it shows a schematic diagram of the structure of the computer device involved in the embodiment of the present 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 appreciate that Figure 4 The computer device structure shown in the figure does not constitute a limitation on the computer device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. Among them:

[0145] The processor 401 is the control center of the computer device. It uses various interfaces and lines to connect various parts of the entire computer device. By running or executing software programs and / or modules stored in the memory 402 and calling data stored in the memory 402, it executes various functions of the computer device and processes data, thereby monitoring the computer device as a whole. 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 processes the operation storage medium, user interface and application programs, etc., and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned 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, wherein the program storage area may store an operating storage medium, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. 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 for supplying power to various components. Preferably, the power supply 403 can be logically connected to the processor 401 through a power management storage medium, so as to manage charging, discharging, and power consumption management through the power management storage medium. The power supply 403 can also include any components such as one or more DC or AC power supplies, recharge storage media, power failure detection circuits, power converters or inverters, and power status indicators.

[0148] The computer device may further include an input unit 404, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input 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 herein. Specifically in this embodiment, the processor 401 in the computer device will load the executable files corresponding to the processes of one or more application programs into the memory 402 according to the following instructions, and the processor 401 will run the application programs stored in the memory 402, thereby implementing the steps in the above-mentioned test method embodiment.

[0150] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0151] To this end, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer program is loaded by a processor to execute the steps in any one of the testing methods provided in the embodiments of the present application.

[0152] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0153] The computer-readable storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0154] Since the computer program stored in the computer-readable storage medium can execute the steps in any test method provided in the embodiments of the present application, the beneficial effects that can be achieved by any test method provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0155] The above is a detailed introduction to a test method, test equipment, system, computer equipment and medium for quantifying the air tightness of a pressurized building provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A test method for quantifying the air tightness of a pressurized building, characterized in that: include: After the pressurized building is pressurized to a first air pressure, the air flow rate change rate and the first pressurized building air pressure change rate are measured to obtain the pressurized building net space; Acquire the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fit the internal air pressure to obtain the second pressurized building air pressure change rate; Obtaining the leakage amount of the pressurized building at any air pressure according to the net space of the pressurized building and the air 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 determined based on the leakage rate per unit volume of the pressurized building.

2. The testing method according to claim 1, characterized in that: The step of measuring the air flow rate 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 internal air volume of the pressurized building; Fitting the internal air pressure of the pressurized building to obtain a function of air pressure changing with time; Fitting the air volume inside the pressurized building to obtain a function of air flow rate changing over time; Based on the function of the air pressure changing with time and the function of the air flow changing with time, the pressurized building net space is obtained.

3. The testing method according to claim 2, characterized in that: The step of obtaining the pressurized building net space based on the function of the air pressure changing with time and the function of the air flow changing with time includes: Derivatives of the function of the air pressure changing with time and the function of the air flow changing with time with respect to time are respectively obtained to obtain the air pressure change rate and the air flow change rate of the first pressurized building; Select the air pressure and air flow at several time points and substitute them into the air pressure change rate and the air flow change rate of the first pressurized building respectively, to obtain the derivative function value of the air pressure change function over time and the derivative function value of the air flow change function over time corresponding to each time point; The pressurized net volume of the pressurized building corresponding to each time point is obtained based on the derivative function value of the air pressure changing with time function and the derivative function value of the air flow changing with time function corresponding to each time point; The average value of the pressurized net volume of the pressurized building corresponding to each time point is taken as the net space of the pressurized building.

4. The testing method according to claim 3, characterized in that: Depend on The net pressurized volume V of the pressurized building corresponding to each time point is obtained, where: is the air pressure change rate of the first pressurized building, is the air flow rate change rate, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the time, Q is the air volume of the pressurized building when the air is converted to the ambient pressure, P is the air pressure inside the pressurized building, P1 is the ambient pressure, and P0 is the standard atmospheric pressure.

5. The testing method according to any one of claims 1 to 4, characterized in that: The step of obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fitting the internal air pressure to obtain the second pressurized building air pressure change rate includes: After the air pressure in the control room is increased to the second air pressure, the air pressure inside the pressurized building after the air pressure is increased to the second air pressure is obtained; Fitting the internal air pressure of the pressurized building after the air pressure is increased to the second air pressure to obtain a function of the change of the air pressure of the pressurized building after the air pressure is increased to the second air pressure over time; The second pressurized building air pressure change rate is obtained by taking the derivative of the function of the pressurized building air pressure after the pressurized building air pressure is increased to the second air pressure and changing with time.

6. The testing method according to claim 5, characterized in that: The method of obtaining the leakage amount of the pressurized building under any air pressure according to the net space of the pressurized building and the air pressure change rate of the second pressurized building includes: Depend on Get the leakage of the pressurized building under any air pressure, where is the rate of change of air pressure in the second pressurized building, P′ is the air pressure inside the pressurized building, R is the molar gas constant, T is the gas temperature inside the pressurized building, t is the 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 the air is converted to the ambient air pressure.

7. A test device capable of quantifying the air tightness of a pressurized building, characterized in that: include: A pressurized net space calculation module is used to obtain the pressurized building net space by measuring the air flow rate change rate and the first pressurized building air pressure change rate after pressurizing the pressurized building to a first air pressure; A data fitting module, used for obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, and fitting the internal air pressure to obtain the second pressurized building air pressure change rate; A leakage calculation module, used for obtaining the leakage of the pressurized building under any air pressure according to the net space of the pressurized building and the air pressure change rate of the second pressurized building; The airtightness calculation module is used to obtain the leakage rate per unit volume of the pressurized building based on the leakage amount of the pressurized building under any air pressure, and to judge the airtightness of the pressurized building based on the leakage rate per unit volume of the pressurized building.

8. A test system capable of quantifying the air tightness of a pressurized building, characterized in that: include: Pressurizing equipment, volume flow meters, electric valves, pressure transmitters, control modules and test equipment capable of quantifying the air tightness of pressurized buildings; The control module is connected to the boosting device, the volume flow meter, the electric valve and the pressure transmitter respectively, and is used to control the boosting device and the electric valve to boost the boosted building, and after the boosted building is boosted to the first air pressure, control the volume flow meter to measure the air flow and the pressure transmitter to measure the air pressure of the boosted building; The test equipment capable of quantifying the air tightness of a pressurized building is used to measure the air flow rate change rate and the first pressurized building air pressure change rate to obtain the pressurized building net space; Obtaining the internal air pressure of the pressurized building after the pressurization is increased to the second air pressure, fitting the internal air pressure to obtain the air pressure change rate of the second pressurized building; obtaining the leakage amount of the pressurized building at any air pressure according to the net space of the pressurized building and the air 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 determined 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, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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