Method and system for detecting thermal insulation performance of doors and windows

Abstract

The invention provides a door and window thermal insulation performance detection method and system. The system comprises a simulation hot box; a simulated cold box; a test piece mounting position; a refrigeration module; a heating module; a humidity adjusting module; a wind speed adjusting module and a control module; wherein the test piece installation position is formed between the simulation hot box and the simulation cold box, the refrigeration module is connected to the simulation cold box, the heating module is connected to the simulation hot box, the humidity adjusting module is installed in the simulation hot box, the wind speed adjusting module is installed in the simulation cold box, and the test piece installation position is formed between the simulation hot box and the simulation cold box. The refrigeration module, the heating module, the humidity adjusting module and the wind speed adjusting module are in communication connection with the control module; wherein the refrigeration module comprises a refrigeration module body and a heat dissipation module body, the refrigeration module body is installed in the simulation cold box, and the heat dissipation module body is connected to the heating module body in a heat conduction mode.

Description

Technical Field

[0001] The present application relates to the field of door and window performance testing, and in particular to a door and window thermal insulation performance testing method and system. Background Art

[0002] Thermal insulation performance testing of doors and windows is an important process to evaluate the ability of doors and windows in terms of heat insulation and thermal insulation. With the improvement of building energy-saving requirements, doors and windows, as an important part of the building envelope, have a direct impact on the comfort and energy consumption level of the indoor environment. Therefore, thermal insulation performance testing of doors and windows helps to ensure the energy efficiency and comfort of the building during use.

[0003] The commonly used methods for testing the thermal insulation performance of doors and windows in the current market mainly include thermal conductivity test, air permeability test, water tightness and wind pressure performance test, etc. The thermal conductivity test is to evaluate the thermal insulation capacity of the material by measuring the heat conduction of the material in a unit time. The advantage of this method is that it can provide direct numerical indicators, which is convenient for comparison and analysis, but it also has certain disadvantages. It is necessary to simulate the indoor and outdoor conditions on both sides of the test piece during the test, there is a large temperature difference, and a large amount of energy is consumed for environmental simulation. Summary of the invention

[0004] The present application provides a door and window thermal insulation performance detection system, comprising:

[0005] Simulated hot box;

[0006] Simulated cold box;

[0007] Test piece installation position;

[0008] Refrigeration module;

[0009] Heating module;

[0010] Humidity control module;

[0011] Wind speed adjustment module;

[0012] Control module;

[0013] The test piece is installed between the simulated hot box and the simulated cold box, the refrigeration module is connected to the simulated cold box, the heating module is connected to the simulated hot box, the humidity adjustment module is installed inside the simulated hot box, the wind speed adjustment module is installed inside the simulated cold box, and the refrigeration module, the heating module, the humidity adjustment module and the wind speed adjustment module are communicatively connected to the control module;

[0014] Wherein, the refrigeration module includes a refrigeration module and a heat dissipation module, the refrigeration module is installed inside the simulated cold box, and the heat dissipation module is thermally connected to the heating module.

[0015] By adopting the above technical solution, the door and window thermal insulation performance detection system can realize energy recycling by connecting the heat dissipation module of the refrigeration module with the heating module, improve the energy efficiency of the system, and make the door and window thermal insulation performance detection process more environmentally friendly and energy-saving.

[0016] Optionally, the heating module includes a waste heat heating module, a main heating module, an insulated hot water storage tank, a water circulation module and multiple temperature detection modules; the waste heat heating module and the main heating module are thermally connected to the insulated hot water storage tank respectively, the water circulation module is conductively connected to the insulated hot water storage tank, each of the temperature detection modules is respectively arranged inside the insulated hot water storage tank, the water circulation module and the simulated heat box, the water circulation module is installed inside the simulated heat box, and the waste heat heating module is thermally connected to the heat dissipation module of the refrigeration module.

[0017] By adopting the above technical solution, the door and window thermal insulation performance detection system can recover the heat dissipation of the refrigeration module through the waste heat heating module, combined with the main heating module, and double heating the thermal insulation hot water storage tank to achieve efficient energy utilization. The water circulation module evenly distributes the heat to the simulated heat box, ensuring the temperature stability in the simulated heat box, which not only improves the energy efficiency of the system, but also enhances the accuracy and stability of temperature control.

[0018] Optionally, the door and window thermal insulation performance detection system further includes a thermal insulation detection strategy, including the following steps:

[0019] A1, installing a preset test piece at the test piece installation position;

[0020] A2, maintaining the temperature in the simulated cold box to a preset cold box test temperature through the refrigeration module;

[0021] A3, maintaining the temperature in the simulated hot box to a preset hot box test temperature through the heating module;

[0022] A4, adjusting the humidity in the simulated hot box to a preset hot box test humidity through the humidity adjustment module;

[0023] A5, counting the heating power of the heating module within a preset heat preservation test time window;

[0024] A6, collect other relevant parameter data during the insulation test window;

[0025] A7, calculate the thermal conductivity of the test piece according to the heating power and other relevant parameter data.

[0026] By adopting the above technical solution, the door and window thermal insulation performance detection system can create a stable and reliable testing environment by controlling the temperature and humidity of the simulated cold box and the simulated hot box, and calculate the thermal conductivity of the test piece by counting the heating power of the heating module and collecting other related parameters.

[0027] Optionally, step A3 includes the following steps:

[0028] A301, obtaining the corresponding circulating water temperature in the insulated hot water storage tank through the temperature detection module and defining it as the current circulating water temperature;

[0029] A302, if the current circulating water temperature is lower than the preset preheating temperature, the circulating water in the thermal insulation hot water storage tank is heated by the waste heat heating module and the main heating module at the same time;

[0030] A303, if the current circulating water temperature is not less than the preheating temperature, the circulating water in the heat-insulating hot water storage tank is heated by the main heating module until the current circulating water temperature reaches a preset target circulating water temperature;

[0031] A304, obtaining the corresponding hot box air temperature in the simulated hot box through the temperature detection module and defining it as the current hot box air temperature;

[0032] A305, if the current hot box air temperature is lower than the hot box test temperature, the circulating water flow rate of the water circulation module is gradually increased until the current hot box air temperature reaches the hot box test temperature.

[0033] By adopting the above technical solution, the door and window thermal insulation performance detection system can assist in heating the circulating water by utilizing the waste heat generated by the refrigeration module, and achieve precise control of the circulating water temperature through a staged heating method, and further achieve stable control of the air temperature in the simulated heat box by controlling the flow rate of the circulating water.

[0034] Optionally, the step A3 further comprises the following steps:

[0035] A306, obtaining temperature data in the simulated heat box within a preset steady-state determination time window and defining the temperature data as steady-state detection temperature data of the heat box;

[0036] A307, calculates the corresponding hot box steady-state detection average temperature according to the hot box steady-state detection temperature data;

[0037] A308, calculates the corresponding standard deviation of the hot box steady-state detection temperature based on the hot box steady-state detection temperature data;

[0038] A309, if the absolute value of the difference between the hot box steady-state detection average temperature and the hot box test temperature is less than the preset temperature deviation threshold, and the hot box steady-state detection temperature standard deviation is less than the preset temperature fluctuation standard deviation threshold, then the circulating water flow of the water circulation module is obtained and defined as the steady-state circulating water flow.

[0039] By adopting the above technical scheme, the door and window thermal insulation performance detection system can consider the proximity of the average temperature to the target temperature, pay attention to the amplitude of temperature fluctuation, evaluate the temperature stability by calculating the standard deviation, and improve the reliability of the temperature stability of the hot box. At the same time, it also determines the circulating water flow rate when a stable state is reached, providing important reference data for subsequent testing and system optimization.

[0040] Optionally, step A6 includes the following steps:

[0041] A601, obtaining water supply temperature data and return water temperature data of the water circulation module through the temperature detection module within the insulation test time window;

[0042] A602, calculate the corresponding average water supply temperature based on the water supply temperature data;

[0043] A603, calculate the corresponding average return water temperature based on the return water temperature data;

[0044] A604, calculate the average temperature difference of circulating water based on the difference between the average supply water temperature and the average return water temperature;

[0045] A605, calculating the heating power corresponding to the heating module according to the average temperature difference of the circulating water and the steady-state circulating water flow rate.

[0046] By adopting the above technical solution, the door and window insulation performance detection system can realize accurate estimation of heating power by monitoring the supply and return water temperature of the water circulation module, avoiding the error that may be caused by direct measurement of electric power, being closer to the actual heat transfer process, providing reliable basic data for the subsequent calculation of thermal conductivity, and improving the accuracy of the entire detection process.

[0047] Optionally, the door and window thermal insulation performance detection system further includes an anti-condensation factor algorithm:

[0048] B1, obtaining the air temperature data in the simulated hot box within the heat preservation test time window and defining it as the hot box heat preservation test air temperature data;

[0049] B2, obtaining the air temperature data in the simulated cold box within the insulation test time window and defining it as the cold box insulation test air temperature data;

[0050] B3, obtaining the glass hot side surface temperature data of the test piece within the insulation test window;

[0051] B4, obtaining the surface temperature data of the hot side of the frame of the test piece within the window during the thermal insulation test;

[0052] B5, calculate the corresponding average temperature of the hot box insulation test based on the average value of the hot box insulation test temperature data;

[0053] B6, calculate the corresponding average temperature of the cold box insulation test based on the average value of the cold box insulation test temperature data;

[0054] B7, calculating the corresponding average temperature of the hot side surface of the glass by averaging the temperature data of the hot side surface of the glass;

[0055] B8, calculating the corresponding average data of the hot side surface of the frame according to the average value of the hot side surface temperature data of the frame;

[0056] B9, calculate the corresponding glass anti-condensation factor and frame anti-condensation factor according to the average temperature of the hot box insulation test, the average temperature of the cold box insulation test, the glass hot side surface temperature data and the frame hot side surface temperature data.

[0057] By adopting the above technical scheme, the door and window thermal insulation performance detection system can collect the hot box thermal insulation test air temperature data, the cold box thermal insulation test air temperature data, the glass hot side surface temperature data and the frame hot side surface temperature data, and then calculate the glass anti-condensation factor and the frame anti-condensation factor of the test piece. Combined with the circulating water heating method, the accuracy of the hot box thermal insulation test air temperature data and its average value can be improved, thereby improving the accuracy of the anti-condensation factor.

[0058] The present application also provides a method for detecting the thermal insulation performance of doors and windows, comprising the following steps:

[0059] Installing a preset test piece at the test piece installation position;

[0060] Maintaining the temperature in the preset simulated cold box to the preset cold box test temperature through a preset refrigeration module;

[0061] Obtain the corresponding circulating water temperature in the preset insulated hot water storage tank and define it as the current circulating water temperature;

[0062] If the current circulating water temperature is lower than the preset preheating temperature, the circulating water in the heat preservation hot water storage tank is heated by the preset waste heat heating module and the preset main heating module at the same time;

[0063] If the current circulating water temperature is not less than the preheating temperature, the circulating water in the heat-insulating hot water storage tank is heated by the main heating module until the current circulating water temperature reaches the preset target circulating water temperature;

[0064] Obtain the corresponding hot box temperature in the preset simulated hot box and define it as the current hot box temperature;

[0065] If the current hot box air temperature is lower than the hot box test temperature, the circulating water flow rate of the water circulation module is gradually increased until the current hot box air temperature reaches the hot box test temperature;

[0066] Adjusting the humidity in the simulated hot box to a preset hot box test humidity through a preset humidity adjustment module;

[0067] Counting the heating power of the heating module in a preset heat preservation test time window;

[0068] Collect other relevant parameter data in the insulation test window;

[0069] The thermal conductivity of the test piece is calculated based on the heating power and other relevant parameter data.

[0070] By adopting the above technical solution, the door and window insulation performance detection method can recover the heat dissipation of the refrigeration module through the waste heat heating module, combined with the main heating module, and double heating the insulation hot water storage tank to achieve efficient energy utilization. The water circulation module evenly distributes the heat to the simulated heat box, ensuring the temperature stability in the simulated heat box, which not only improves the energy efficiency of the system, but also enhances the accuracy and stability of temperature control.

[0071] In summary, the present application includes at least one of the following beneficial technical effects:

[0072] 1. By connecting the heat dissipation module of the refrigeration module with the heating module, energy recycling can be achieved, the energy efficiency of the system can be improved, and the door and window insulation performance testing process can be made more environmentally friendly and energy-saving.

[0073] 2. The heat dissipation of the refrigeration module can be recovered through the waste heat heating module. Combined with the main heating module, the double heating and insulation hot water storage tank can achieve efficient use of energy. The water circulation module evenly distributes the heat to the simulated hot box, ensuring the temperature stability in the simulated hot box, which not only improves the energy efficiency of the system, but also enhances the accuracy and stability of temperature control.

[0074] 3. By controlling the temperature and humidity of the simulated cold box and the simulated hot box, a stable and reliable test environment can be created, and the thermal conductivity of the test piece can be calculated by statistically analyzing the heating power of the heating module and collecting other related parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 It is a schematic diagram of the principle of a door and window thermal insulation performance detection system of the present invention.

[0076] Figure 2 It is a process schematic diagram of a method for detecting thermal insulation performance of doors and windows of the present invention. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0078] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0079] refer to Figure 1 The present invention provides a door and window thermal insulation performance detection system for detecting the thermal insulation performance of doors and windows, comprising:

[0080] Simulated hot box 10;

[0081] Simulated cold box 20;

[0082] Test piece installation position 30;

[0083] Refrigeration module 40;

[0084] Heating module 50;

[0085] Humidity adjustment module 60;

[0086] Wind speed adjustment module 70;

[0087] Control module 80;

[0088] The test piece installation position 30 is formed between the simulated hot box 10 and the simulated cold box 20, the refrigeration module 40 is connected to the simulated cold box 20, the heating module 50 is connected to the simulated hot box 10, the humidity adjustment module 60 is installed inside the simulated hot box, the wind speed adjustment module 70 is installed inside the simulated cold box 20, and the refrigeration module 40, the heating module 50, the humidity adjustment module 60 and the wind speed adjustment module 70 are communicatively connected to the control module 80;

[0089] The refrigeration module 40 includes a refrigeration module 41 and a heat dissipation module 42 . The refrigeration module 41 is installed inside the simulated cold box 10 , and the heat dissipation module 42 is thermally connected to the heating module 50 .

[0090] The simulated heat box 10 is mainly used to simulate an indoor environment, to simulate a stable indoor environment, and to be isolated from an external device environment. The simulated heat box 10 is usually made of a heat-insulating material.

[0091] The simulated cold box 20 is mainly used to simulate the outdoor environment, to simulate a stable low-temperature outdoor environment, and to be isolated from the external equipment environment. The simulated cold box 20 is usually made of a heat-insulating material.

[0092] The test piece installation position 30 is mainly used to install the test piece to be subjected to the insulation test, and is used to fix the test piece between the simulated hot box 10 and the simulated cold box 20 so that the two sides of the test piece face the simulated hot box 10 and the simulated cold box 20 respectively.

[0093] The refrigeration module 40 is mainly used to cool the air in the simulated cold box 20 and maintain it at a set test temperature to simulate the outdoor temperature, for example, -20°C.

[0094] The refrigeration module 41 is mainly used for refrigerating the simulated cold box 20 .

[0095] The heat dissipation module 42 is mainly used to discharge the heat generated by the refrigeration module 41 during refrigeration.

[0096] The heating module 50 is mainly used to heat the air in the simulated heat box 10 and maintain it at a set test temperature to simulate the indoor air temperature, for example, 20°C.

[0097] Among them, part of the heat generated by the refrigeration module 30 when cooling the simulated cold box 20 is discharged from the heat dissipation module 42, and the heat dissipation module 42 is thermally connected through the heating module 50. The heat discharged by the heat dissipation module 42 can be used to assist the heating module 50 in heating the simulated hot box 10, thereby reducing the heating energy consumption of the heating module 50.

[0098] The humidity adjustment module 60 is mainly used to adjust the air humidity in the simulated heat box 10 to maintain the air humidity at a set test humidity, for example, lower than 20% relative humidity.

[0099] The wind speed regulating module 70 is mainly used to form an airflow with a specific flow rate in the simulated cold box 20 to simulate the outdoor wind force.

[0100] The control module 80 is mainly used to analyze the data collected by the modules and control the modules according to the data.

[0101] Through the above technical scheme, the door and window thermal insulation performance detection system can realize energy recycling by connecting the heat dissipation module of the refrigeration module with the heating module, improve the energy efficiency of the system, and make the door and window thermal insulation performance detection process more environmentally friendly and energy-saving.

[0102] Furthermore, the heating module 50 includes a waste heat heating module 51, a main heating module 52, an insulated hot water storage tank 53, a water circulation module 54 and multiple temperature detection modules 55. The waste heat heating module 51 and the main heating module 52 are thermally connected to the insulated hot water storage tank 53 respectively, and the water circulation module 54 is conductively connected to the insulated hot water storage tank 53. Each of the temperature detection modules is respectively arranged inside the insulated hot water storage tank 53, the water circulation module 54 and the simulated heat box 10. The water circulation module 54 is installed inside the simulated heat box 10. The waste heat heating module 51 is thermally connected to the heat dissipation module 42 of the refrigeration module 40.

[0103] The waste heat heating module 51 is mainly used to obtain the waste heat discharged from the heat dissipation module 42 of the refrigeration module 40 to auxiliary heat the circulating water in the thermal insulation hot water storage tank 53 .

[0104] The main heating module 52 is mainly used to heat the circulating water in the thermal insulation hot water storage tank 53 .

[0105] The heat-insulating hot water storage tank 53 is mainly used for heat-insulating and storing circulating water for heating the air in the simulated heat box 10 .

[0106] Since water has a high specific heat capacity, when the air in the simulated heat box 10 is heated by circulating water, a relatively stable heating effect is achieved.

[0107] The water circulation module 54 is mainly used to introduce the hot circulating water in the heat-insulating hot water storage tank 53 into the simulated heat box 10 through a water circulation, so as to heat the air in the simulated heat box 10.

[0108] Each temperature detection module 55 is mainly used to obtain temperature data corresponding to each module or position, so as to control and adjust the module according to the temperature.

[0109] Through the above calculation scheme, the door and window thermal insulation performance detection system can recover the heat dissipation of the refrigeration module through the waste heat heating module, combined with the main heating module, and double heating the thermal insulation hot water storage tank to achieve efficient energy utilization. The water circulation module evenly distributes the heat to the simulated heat box, ensuring the temperature stability in the simulated heat box, which not only improves the energy efficiency of the system, but also enhances the accuracy and stability of temperature control.

[0110] Furthermore, the door and window thermal insulation performance detection system further includes a thermal insulation detection strategy, including the following steps:

[0111] A1, installing a preset test piece at the test piece installation position 30;

[0112] The test piece is a selected door and window test piece that needs to be tested for thermal insulation performance. The test piece is installed at the installation position 30 so that its two sides are in contact with the air in the simulated hot box 10 and the simulated cold box 20 respectively.

[0113] A2, maintaining the temperature in the simulated cold box 40 to a preset cold box test temperature through the refrigeration module 40;

[0114] The cold box test temperature is the preset air temperature that needs to be reached in the simulated cold box 40 during the insulation test.

[0115] A3, maintaining the temperature in the simulated hot box 10 to a preset hot box test temperature through the heating module 50;

[0116] The hot box test temperature is the preset air temperature that needs to be reached in the simulated hot box 10 during the insulation test.

[0117] A4, adjusting the humidity in the simulated hot box to a preset hot box test humidity through the humidity adjustment module 60;

[0118] The heat box test humidity is the air humidity that needs to be reached in the simulated heat box 10 during the pre-set heat preservation test.

[0119] A5, counting the heating power of the heating module 50 within a preset heat preservation test time window;

[0120] The insulation test time window is a pre-set time window used to determine the corresponding data collection period, wherein the heating amount of the heating module 50 is collected within the insulation test window, and the corresponding heating power can be determined by dividing it by the length of the insulation test time window.

[0121] A6, collect other relevant parameter data during the insulation test window;

[0122] Other relevant parameter data are various related data that need to be collected during the door and window insulation test for calculating the thermal conductivity of the test piece. They can be measured by various sensors, or predetermined test parameters, such as the heat flux coefficient of the outer wall of the hot box and the heat flux coefficient of the test piece frame determined in advance through calibration tests, the difference in weighted average temperature of the inner and outer surface areas of the outer wall of the hot box, the difference in weighted average temperature of the hot side and cold side surface areas of the test piece frame, etc.

[0123] A7, calculate the thermal conductivity of the test piece according to the heating power and other relevant parameter data;

[0124] The calculation method and formula for the thermal conductivity of the test piece are prior art and will not be described in detail here.

[0125] Through the above steps, the door and window thermal insulation performance detection system can create a stable and reliable test environment by controlling the temperature and humidity of the simulated cold box and the simulated hot box, and calculate the thermal conductivity of the test piece by counting the heating power of the heating module and collecting other related parameters.

[0126] Furthermore, the step A3 comprises the following steps:

[0127] A301, obtaining the corresponding circulating water temperature in the insulated hot water storage tank 53 through the temperature detection module 55 and defining it as the current circulating water temperature;

[0128] The current circulating water temperature is the real-time temperature value of the circulating water in the thermal insulation hot water storage tank 53 .

[0129] A302, if the current circulating water temperature is lower than the preset preheating temperature, the circulating water in the heat preservation hot water storage tank 53 is heated by the waste heat heating module 51 and the main heating module at the same time;

[0130] The preheating temperature is a preset temperature used to determine the initial heating temperature of the circulating water so as to determine whether it is necessary to call the waste heat heating module 51 to heat the circulating water.

[0131] A303, if the current circulating water temperature is not less than the preheating temperature, the circulating water in the heat-insulating hot water storage tank 53 is heated by the main heating module 52 until the current circulating water temperature reaches the preset target circulating water temperature;

[0132] The target circulating water temperature is the temperature value that the circulating water in the thermal insulation hot water storage tank 53 needs to reach when performing the thermal insulation test;

[0133] When the current circulating water temperature is greater than or equal to the preheating temperature, since heating by waste heat is difficult to control, it is necessary to switch to separate heating by the main heating module 52 after the circulating water reaches a certain temperature so that the circulating water can be accurately heated to the corresponding temperature. Moreover, it is not easy to measure the accurate amount of heat when heating the circulating water by waste heat. Therefore, when performing the insulation test, the circulating water should also be heated by the main heating module 52 alone.

[0134] A304, obtaining the corresponding hot box air temperature in the simulated hot box 10 through the temperature detection module 55 and defining it as the current hot box air temperature;

[0135] The current hot box air temperature is the real-time air temperature in the simulated hot box 10 .

[0136] A305, if the current hot box air temperature is lower than the hot box test temperature, the circulating water flow rate of the water circulation module 42 is gradually increased until the current hot box air temperature reaches the hot box test temperature.

[0137] The circulating water flow rate is the flow rate of the circulating water in the water circulation module 42;

[0138] Before the air temperature in the simulated hot box 20 reaches the test temperature, the heat inside it will continuously flow to the simulated cold box 10 through the test piece. By gradually adjusting the flow rate from slow to fast, a circulating water flow rate for temperature dynamic balance can be found, so that the current hot box air temperature can be balanced near the hot box test temperature. At this time, the heat loss rate of the simulated hot box 20 and the heat provided by the water circulation module 54 to the simulated hot box 20 are approximately equal.

[0139] Through the above steps, the door and window heat preservation performance detection system can use the waste heat generated by the refrigeration module to assist in heating the circulating water, and achieve precise control of the circulating water temperature through a staged heating method. Further, by controlling the flow rate of the circulating water, stable control of the air temperature in the simulated hot box is achieved.

[0140] Further, step A3 further includes the following steps:

[0141] A306, obtain the temperature data in the simulated hot box 10 within a preset steady-state determination time window and define it as the hot box steady-state detection air temperature data;

[0142] The steady-state determination time window is a pre-set time window for obtaining data within a specific duration to determine whether the air temperature in the simulated hot box 10 reaches a certain degree of stability;

[0143] The hot box steady-state detection air temperature data is the temperature data obtained in the simulated hot box 10 within the steady-state determination time window.

[0144] A307, calculate the corresponding hot box steady-state detection average air temperature according to the hot box steady-state detection air temperature data;

[0145] The hot box steady-state detection average air temperature is the average value of the hot box steady-state detection air temperature data.

[0146] A308, calculate the corresponding hot box steady-state detection air temperature standard deviation according to the hot box steady-state detection air temperature data;

[0147] The hot box steady-state detection air temperature standard deviation is the standard deviation of the hot box steady-state detection air temperature data.

[0148] A309, if the absolute value of the difference between the hot box steady-state detection average air temperature and the hot box test temperature is less than the preset temperature deviation threshold, and the hot box steady-state detection air temperature standard deviation is less than the preset temperature fluctuation standard deviation threshold, then obtain the circulating water flow rate of the water circulation module 54 and define it as the steady-state circulating water flow rate;

[0149] The temperature deviation threshold is a pre-set reference value used to determine whether the average temperature of the hot box steady-state detection deviates too much;

[0150] The temperature fluctuation standard deviation threshold is a preset reference value used to determine whether the temperature standard of the hot box steady-state detection temperature is too large, that is, whether the sample data fluctuation of the hot box steady-state detection temperature data is too large;

[0151] The steady-state circulating water flow is the circulating water flow when the average temperature of the steady-state detection of the hot box and the standard deviation of the steady-state detection temperature of the hot box meet the stable conditions;

[0152] By determining the steady-state circulating water flow rate and combining the supply temperature and return temperature of the circulating water, the heat loss of the simulated heat box 10 can be calculated, and then the thermal conductivity of the test piece can be calculated.

[0153] Through the above steps, the door and window thermal insulation performance detection system can consider the proximity of the average temperature to the target temperature, pay attention to the amplitude of temperature fluctuation, evaluate the temperature stability by calculating the standard deviation, and improve the reliability of the temperature stability of the hot box. At the same time, it also determines the circulating water flow rate when the stable state is reached, providing important reference data for subsequent testing and system optimization.

[0154] Furthermore, the step A6 comprises the following steps:

[0155] A601, obtaining the water supply temperature data and the return water temperature data of the water circulation module 54 through the temperature detection module 55 within the insulation test time window;

[0156] The water supply temperature data is the temperature data of the circulating water flowing out of the water circulation module 54 collected in the window during the insulation test;

[0157] The return water temperature data is the temperature data of the circulating water flowing back from the water circulation module 54 collected in the window during the insulation test.

[0158] A602, calculate the corresponding average water supply temperature based on the water supply temperature data;

[0159] The average water supply temperature is the average value of the water supply temperature data.

[0160] A603, calculate the corresponding average return water temperature based on the return water temperature data;

[0161] The average return water temperature is the average value of the return water temperature data.

[0162] A604, calculate the average temperature difference of circulating water based on the difference between the average supply water temperature and the average return water temperature;

[0163] The average temperature difference of circulating water is the average temperature difference between the supply and return water of circulating water in the window during the insulation test.

[0164] A605, calculating the heating power corresponding to the heating module 50 according to the average temperature difference of the circulating water and the steady-state circulating water flow rate;

[0165] The heat obtained by the simulated heat box 10 from the circulating water during the insulation test window can be calculated by the average temperature difference of the circulating water, the state circulating water flow rate, the specific heat capacity of the water and the duration of the insulation test window, which is approximately equal to the heat lost by the simulated heat box 10 and can be calculated by the following formula:

[0166] H=m*c*ΔT*t,

[0167] Wherein, H is the heat obtained by the simulated heat box 10 from the circulating water during the insulation test window, m is the circulating water flow rate, c is the specific heat capacity of water, ΔT is the average temperature difference of the circulating water, and t is the duration of the insulation test window.

[0168] Furthermore, the heating power of the heating module 50 within the heat preservation test window can be obtained by dividing by the duration of the heat preservation test window, that is:

[0169] Q=m*c*ΔT,

[0170] Wherein, Q is the heating power of the heating module 50 in the window during the insulation test.

[0171] Through the above steps, the door and window insulation performance detection system can realize accurate estimation of heating power by monitoring the supply and return water temperatures of the water circulation module, avoids the errors that may be caused by direct measurement of electric power, is closer to the actual heat transfer process, and provides reliable basic data for the subsequent calculation of thermal conductivity, thereby improving the accuracy of the entire detection process.

[0172] Furthermore, the door and window thermal insulation performance detection system further includes an anti-condensation factor algorithm:

[0173] B1, obtaining the temperature data in the simulated heat box 10 within the heat preservation test time window and defining it as the heat box heat preservation test temperature data;

[0174] The temperature data of the hot box insulation test is the temperature data in the simulated hot box 10 during the insulation test window.

[0175] B2, obtaining the air temperature data in the simulated cold box within the insulation test time window and defining it as the cold box insulation test air temperature data;

[0176] The cold box insulation test air temperature data is the air temperature data in the simulated cold box 20 during the insulation test window.

[0177] B3, obtaining the glass hot side surface temperature data of the test piece within the insulation test window;

[0178] The glass hot side surface temperature data is the temperature data of the glass surface of the test piece located on one side of the simulated heat box 10 obtained in the window during the heat preservation test.

[0179] B4, obtaining the surface temperature data of the hot side of the frame of the test piece within the window during the thermal insulation test;

[0180] The frame hot side surface temperature data is the temperature data of the frame surface of the test piece located on one side of the simulated heat box 10 obtained in the window during the heat preservation test.

[0181] B5, calculate the corresponding average temperature of the hot box insulation test based on the average value of the hot box insulation test temperature data;

[0182] The average temperature of the hot box insulation test is the average value of the hot box insulation test temperature data.

[0183] B6, calculate the corresponding average temperature of the cold box insulation test based on the average value of the cold box insulation test temperature data;

[0184] The average temperature of the cold box insulation test is the average value of the cold box insulation test temperature data.

[0185] B7, calculating the corresponding average temperature of the hot side surface of the glass by averaging the temperature data of the hot side surface of the glass;

[0186] The average temperature of the hot side surface of the glass is the average value of the hot side surface temperature data of the glass.

[0187] B8, calculating the corresponding average data of the hot side surface of the frame according to the average value of the hot side surface temperature data of the frame;

[0188] The average data of the hot side surface of the frame is the average value of the hot side surface temperature data of the frame.

[0189] B9, calculate the corresponding glass anti-condensation factor and frame anti-condensation factor according to the average temperature of the hot box insulation test, the average temperature of the cold box insulation test, the glass hot side surface temperature data and the frame hot side surface temperature data;

[0190] The glass anti-condensation factor is the anti-condensation factor of the glass part of the test piece;

[0191] The frame anti-condensation factor is the anti-condensation factor of the frame part of the test piece.

[0192] Through the above steps, the door and window thermal insulation performance detection system can collect hot box insulation test air temperature data, cold box insulation test air temperature data, glass hot side surface temperature data and frame hot side surface temperature data, and then calculate the glass anti-condensation factor and frame anti-condensation factor of the test piece. Combined with the circulating water heating method, the accuracy of the hot box insulation test air temperature data and its average value can be improved, thereby improving the accuracy of the anti-condensation factor.

[0193] refer to Figure 2 The present application also provides a method for detecting the thermal insulation performance of doors and windows, comprising the following steps:

[0194] C1, install the preset test piece at the preset test piece installation position;

[0195] C2, maintaining the temperature in the preset simulated cold box to the preset cold box test temperature through the preset refrigeration module;

[0196] C3, obtaining the corresponding circulating water temperature in the preset insulated hot water storage tank and defining it as the current circulating water temperature;

[0197] C4, if the current circulating water temperature is lower than the preset preheating temperature, the circulating water in the heat preservation hot water storage tank is heated by the preset waste heat heating module and the preset main heating module at the same time;

[0198] C5, if the current circulating water temperature is not less than the preheating temperature, the circulating water in the heat-insulating hot water storage tank is heated by the main heating module until the current circulating water temperature reaches the preset target circulating water temperature;

[0199] C6, obtaining the corresponding hot box temperature in the preset simulated hot box and defining it as the current hot box temperature;

[0200] C7, if the current hot box air temperature is lower than the hot box test temperature, gradually increasing the circulating water flow rate of the water circulation module until the current hot box air temperature reaches the hot box test temperature;

[0201] C8, adjusting the humidity in the simulated hot box to a preset hot box test humidity through a preset humidity adjustment module;

[0202] C9, counting the heating power of the heating module within a preset insulation test time window;

[0203] C10, collect other relevant parameter data in the insulation test window;

[0204] C11, calculate the thermal conductivity of the test piece according to the heating power and other relevant parameter data.

[0205] Through the above steps, the door and window thermal insulation performance detection method can recover the heat dissipation of the refrigeration module through the waste heat heating module, combined with the main heating module, and double heating the thermal insulation hot water storage tank to achieve efficient energy utilization. The water circulation module evenly distributes the heat to the simulated heat box, ensuring the temperature stability in the simulated heat box, which not only improves the energy efficiency of the system, but also enhances the accuracy and stability of temperature control.

[0206] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A door and window thermal insulation performance detection system, characterized in that: include: Simulated hot box; Simulated cold box; Test piece installation position; Refrigeration module; Heating module; Humidity control module; Wind speed adjustment module; Control module; The test piece is installed between the simulated hot box and the simulated cold box, the refrigeration module is connected to the simulated cold box, the heating module is connected to the simulated hot box, the humidity adjustment module is installed inside the simulated hot box, the wind speed adjustment module is installed inside the simulated cold box, and the refrigeration module, the heating module, the humidity adjustment module and the wind speed adjustment module are communicatively connected to the control module; Wherein, the refrigeration module includes a refrigeration module and a heat dissipation module, the refrigeration module is installed inside the simulated cold box, and the heat dissipation module is thermally connected to the heating module.

2. The door and window thermal insulation performance detection system according to claim 1, characterized in that: The heating module includes a waste heat heating module, a main heating module, an insulated hot water storage tank, a water circulation module and multiple temperature detection modules. The waste heat heating module and the main heating module are thermally connected to the insulated hot water storage tank respectively, and the water circulation module is conductively connected to the insulated hot water storage tank. Each of the temperature detection modules is respectively arranged inside the insulated hot water storage tank, the water circulation module and the simulated heat box. The water circulation module is installed inside the simulated heat box. The waste heat heating module is thermally connected to the heat dissipation module of the refrigeration module.

3. The door and window thermal insulation performance detection system according to claim 2, characterized in that: The door and window thermal insulation performance detection system further includes a thermal insulation detection strategy, including the following steps: A1, installing a preset test piece at the test piece installation position; A2, maintaining the temperature in the simulated cold box to a preset cold box test temperature through the refrigeration module; A3, maintaining the temperature in the simulated hot box to a preset hot box test temperature through the heating module; A4, adjusting the humidity in the simulated hot box to a preset hot box test humidity through the humidity adjustment module; A5, counting the heating power of the heating module within a preset heat preservation test time window; A6, collect other relevant parameter data during the insulation test window; A7, calculate the thermal conductivity of the test piece according to the heating power and other relevant parameter data.

4. The door and window thermal insulation performance detection system according to claim 3, characterized in that: The step A3 comprises the following steps: A301, obtaining the corresponding circulating water temperature in the insulated hot water storage tank through the temperature detection module and defining it as the current circulating water temperature; A302, if the current circulating water temperature is lower than the preset preheating temperature, the circulating water in the thermal insulation hot water storage tank is heated by the waste heat heating module and the main heating module at the same time; A303, if the current circulating water temperature is not less than the preheating temperature, the circulating water in the heat-insulating hot water storage tank is heated by the main heating module until the current circulating water temperature reaches a preset target circulating water temperature; A304, obtaining the corresponding hot box air temperature in the simulated hot box through the temperature detection module and defining it as the current hot box air temperature; A305, if the current hot box air temperature is lower than the hot box test temperature, the circulating water flow rate of the water circulation module is gradually increased until the current hot box air temperature reaches the hot box test temperature.

5. The door and window thermal insulation performance detection system according to claim 4, characterized in that: The step A3 further comprises the following steps: A306, obtaining temperature data in the simulated heat box within a preset steady-state determination time window and defining the temperature data as steady-state detection temperature data of the heat box; A307, calculates the corresponding hot box steady-state detection average temperature according to the hot box steady-state detection temperature data; A308, calculates the corresponding standard deviation of the hot box steady-state detection temperature based on the hot box steady-state detection temperature data; A309, if the absolute value of the difference between the hot box steady-state detection average temperature and the hot box test temperature is less than the preset temperature deviation threshold, and the hot box steady-state detection temperature standard deviation is less than the preset temperature fluctuation standard deviation threshold, then the circulating water flow of the water circulation module is obtained and defined as the steady-state circulating water flow.

6. The door and window thermal insulation performance detection system according to claim 5, characterized in that: Step A6 includes the following steps: A601, obtaining water supply temperature data and return water temperature data of the water circulation module through the temperature detection module within the insulation test time window; A602, calculate the corresponding average water supply temperature based on the water supply temperature data; A603, calculate the corresponding average return water temperature based on the return water temperature data; A604, calculate the average temperature difference of circulating water based on the difference between the average supply water temperature and the average return water temperature; A605, calculating the heating power corresponding to the heating module according to the average temperature difference of the circulating water and the steady-state circulating water flow rate.

7. The door and window thermal insulation performance detection system according to claim 6, characterized in that: The door and window thermal insulation performance detection system further includes an anti-condensation factor algorithm: B1, obtaining the air temperature data in the simulated hot box within the heat preservation test time window and defining it as the hot box heat preservation test air temperature data; B2, obtaining the air temperature data in the simulated cold box within the insulation test time window and defining it as the cold box insulation test air temperature data; B3, obtaining the glass hot side surface temperature data of the test piece within the insulation test window; B4, obtaining the surface temperature data of the hot side of the frame of the test piece within the window during the thermal insulation test; B5, calculate the corresponding average temperature of the hot box insulation test based on the average value of the hot box insulation test temperature data; B6, calculate the corresponding average temperature of the cold box insulation test based on the average value of the cold box insulation test temperature data; B7, calculating the corresponding average temperature of the hot side surface of the glass by averaging the temperature data of the hot side surface of the glass; B8, calculating the corresponding average data of the hot side surface of the frame according to the average value of the hot side surface temperature data of the frame; B9, calculate the corresponding glass anti-condensation factor and frame anti-condensation factor according to the average temperature of the hot box insulation test, the average temperature of the cold box insulation test, the glass hot side surface temperature data and the frame hot side surface temperature data.

8. A method for detecting the thermal insulation performance of doors and windows, characterized in that: The following steps are involved: Installing a preset test piece at a preset test piece installation position; Maintaining the temperature in the preset simulated cold box to the preset cold box test temperature through a preset refrigeration module; Obtain the corresponding circulating water temperature in the preset insulated hot water storage tank and define it as the current circulating water temperature; If the current circulating water temperature is lower than the preset preheating temperature, the circulating water in the heat preservation hot water storage tank is heated by the preset waste heat heating module and the preset main heating module at the same time; If the current circulating water temperature is not less than the preheating temperature, the circulating water in the heat-insulating hot water storage tank is heated by the main heating module until the current circulating water temperature reaches the preset target circulating water temperature; Obtain the corresponding hot box temperature in the preset simulated hot box and define it as the current hot box temperature; If the current hot box air temperature is lower than the hot box test temperature, the circulating water flow rate of the water circulation module is gradually increased until the current hot box air temperature reaches the hot box test temperature; Adjusting the humidity in the simulated hot box to a preset hot box test humidity through a preset humidity adjustment module; Counting the heating power of the heating module in a preset heat preservation test time window; Collect other relevant parameter data in the insulation test window; The thermal conductivity of the test piece is calculated based on the heating power and other relevant parameter data.

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