A low-e refrigerator glass door heat preservation performance rapid detection device and method

Abstract

The application provides a low-e refrigerator glass door heat preservation performance rapid detection device and method, wherein before the refrigerator door heat preservation performance rapid detection method is used, an equivalent thermal resistance average value and a standard deviation of a standard piece with known performance and qualified are obtained by using the method, the low-e refrigerator glass door heat preservation performance rapid detection method comprises the following steps: S1, temperature field control; S2, air temperature collection on the inner and outer sides of the door; S3, outer surface temperature collection of the door; S4, equivalent thermal resistance calculation, and according to the equivalent thermal resistance result, whether the test piece is qualified is judged by comparing the reference thermal resistance range of the standard piece. The refrigerator glass door heat preservation performance rapid detection method and device achieve the purpose of rapid detection, and can be applied to the low-e glass door type refrigerator door heat preservation performance detection only by using a small amount of data and time.

Description

Technical Field

[0001] This invention relates to the field of door insulation performance testing, and in particular to a rapid testing device and method for the insulation performance of low-e freezer glass doors. Background Technology

[0002] For low-e transparent glass door freezers, most of the cold air loss comes from cold leakage through the glass door. The insulation performance of the glass door directly affects the freezer's insulation effect and energy consumption. If the glass door's insulation performance is insufficient, cold leakage through the glass door increases, leading to increased freezer energy consumption and adverse effects such as condensation. However, currently there is no rapid testing method to determine whether the refrigerator glass door's insulation performance meets standards, resulting in a lack of effective criteria for judging whether the glass door's performance is up to par.

[0003] This invention aims to establish a rapid testing method through experimental research. Based on the average value and standard deviation of the thermal resistance of qualified component door, the thermal resistance of the door is tested by the hot box method, thereby determining whether the thermal insulation performance of the test piece meets the standard. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention presents a testing method and apparatus that offers fast testing speed, requires minimal data, and effectively assesses the thermal insulation performance of low-e glass doors.

[0005] To address the aforementioned issues, this invention discloses a rapid testing method and apparatus for the thermal insulation performance of low-e refrigerator glass doors. Before employing the rapid testing method for the thermal insulation performance of refrigerator doors, it is necessary to obtain the average value and standard deviation of the equivalent thermal resistance of a known qualified standard component tested using this method. Then, the equivalent thermal resistance of the test component is calculated using the hot box method measuring device to determine whether the thermal insulation performance of the test component is qualified.

[0006] The technical solution of the present invention is as follows:

[0007] This invention first provides a rapid testing device for the thermal insulation performance of low-e refrigerator glass doors. This testing device includes an internal temperature control module, an internal pressure control module, an internal and external air temperature measurement module, an external surface temperature measurement module for the refrigerator door, an infrared temperature calibration module, a leakage detection module, and a thermal resistance detection module.

[0008] The cabinet temperature control module consists of a PID control box and an electric heating element. The PID control box is located on the main body of the freezer, and the electric heating element is placed inside the freezer; it is used to control the stability of the air temperature inside the cabinet door.

[0009] The cabinet internal pressure control module consists of an air pump and a differential pressure gauge, which are connected to the hole in the main body of the freezer via a hose. It is used to control the internal pressure to be slightly positive.

[0010] The cabinet's internal and external air temperature measurement module consists of thermocouples and is arranged on both the inside and outside sides of the freezer door. It is used to collect the internal and external air temperatures of the cabinet.

[0011] The cabinet door outer surface temperature measurement module consists of an infrared thermal imager and an optical vibration isolation platform, and is set in front of the freezer door. It is used to take infrared thermal images of the cabinet door outer surface and collect the temperature of the cabinet door outer surface.

[0012] The infrared temperature calibration module is calibrated using infrared thermogram analysis software. It is used to calibrate the temperature results of the cabinet door outer surface temperature measurement module according to the measurement method of the cabinet inside and outside air temperature measurement module, so as to unify the temperature data benchmark.

[0013] The leakage judgment module is used to measure the temperature trend of the edge of the freezer door where the black painted metal frame arranged around the freezer door seam is located, based on the temperature result obtained by the outer surface temperature measurement module of the cabinet door, in order to determine whether the test piece has a leak.

[0014] The thermal resistance judgment module is used to calculate the thermal resistance value of the test piece based on the temperature results obtained by the cabinet internal and external air temperature measurement module and the cabinet door outer surface temperature measurement module, and to determine whether the thermal resistance value of the test piece is qualified.

[0015] The present invention also provides a testing method for the rapid testing device for the thermal insulation performance of the low-e refrigerator glass door as described above, the method comprising the following steps:

[0016] (1) Obtain the average value and standard deviation of the equivalent thermal resistance of the standard parts known to be qualified before the test, and then calculate the equivalent thermal resistance of the test parts using the hot box method measuring device to determine whether the thermal insulation performance of the test parts is qualified.

[0017] (2) Pressure and temperature field control: control the air pressure and temperature inside the test piece to stabilize;

[0018] (3) Collection of air temperature inside and outside the cabinet door: After the air is stabilized in step (1), the air temperature data inside and outside the cabinet door is collected using the air measurement module inside and outside the cabinet door.

[0019] (4) Cabinet door outer surface temperature acquisition: After the air is stabilized in step (1), the cabinet door outer surface temperature measurement module is used to acquire cabinet door outer surface temperature data. The acquisition time should be controlled to match the acquisition time in step S2.

[0020] (5) Equivalent thermal resistance calculation: The equivalent thermal resistance of the test piece is calculated based on the air temperature data inside and outside the cabinet door obtained in step (2) and the temperature data of the outer surface of the cabinet door obtained in step (3). The thermal insulation performance of the test piece is judged based on the average value and standard deviation of the equivalent thermal resistance of the standard piece.

[0021] Furthermore, before using the aforementioned rapid testing method for the insulation performance of refrigerator doors, it is necessary to obtain the average value and standard deviation of the equivalent thermal resistance of standard parts with known qualified performance tested using this method. The calculation process for the equivalent thermal resistance is as follows:

[0022] (3.1) Input known parameters, including cold background temperature and emissivity of the outer surface of the glass door;

[0023] (3.2) Divide the cabinet doors into zones according to the requirements of temperature uniformity;

[0024] (3.3) For each zone, read the air temperature inside and outside the cabinet door and the surface temperature of the cabinet door for that zone;

[0025] (3.4) Calculate and output the equivalent thermal resistance and leakage results of the cabinet door based on the air temperature inside and outside the cabinet door and the surface temperature of the cabinet door.

[0026] Further, step (3.2) includes:

[0027] (3.2.1) Set the uniform air temperature index A inside the cabinet door;

[0028] (3.2.2) Find the boundary width B in the air temperature data inside the cabinet door where the temperature difference with the central area does not exceed A;

[0029] (3.2.3) Based on the width B, the cabinet door area is divided into 9 areas in a grid pattern, and the width of the boundary area is B;

[0030] (3.2.4) The cabinet door areas are numbered from Area 1 to Area 9, with Area 5 being the central area. The center point of each area is used to collect air temperature data on the inside and outside of the cabinet door.

[0031] Furthermore, in step (3.4), the calculation method and principle of equivalent thermal resistance are as follows:

[0032] The external air temperature t1 and internal air temperature t4 are obtained using the internal and external air temperature measurement modules; the internal air temperature t2 is obtained using the external surface temperature measurement module of the cabinet door. The heat transfer through the cabinet door can be expressed by the following formula:

[0033]

[0034] In the formula, q represents the heat transfer per unit area, with units of W / m². 2 k is the heat transfer coefficient, with units of W / (m³). 2 ·℃); Δt is the temperature difference, in ℃; R is the total thermal resistance, R=R1+R2+R3, in (m 2 ·℃) / W;

[0035] Since the heat transfer at each stage is constant, therefore:

[0036]

[0037] In the formula, Δt1 is the surface convective heat transfer temperature difference, Δt1=t1-t2, with units of ℃; R1 is the surface convective heat transfer thermal resistance, with units of (m). 2 ·℃) / W; Δt2 is the temperature difference between the inside and outside of the chamber, Δt2=t2-t3, in ℃; R2 is the thermal resistance of the chamber, in (m) 2 ·℃) / W; Δt3 is the temperature difference of convective heat transfer on the inner surface, Δt3=t3-t4, in ℃; R3 is the thermal resistance of convective heat transfer on the inner surface, in m 2 ·℃) / W;

[0038] Based on the test data, the outer air temperature t1, the inner air temperature t4, and the outer surface temperature of the cabinet door t2 can be obtained. Combined with the convection thermal resistances R1 and R3, the remaining three variables q, t3, and R2 can be calculated, including the equivalent thermal resistance of the cabinet door R2.

[0039] Further, in step (3.4), the cabinet door leakage detection method is as follows: based on the cabinet door surface temperature data, extract the temperature trend of the cabinet door edge, and for all temperature points on each cabinet door edge, if the maximum temperature difference is less than the reference temperature difference c℃, the cabinet door is considered to be well sealed; if the maximum temperature difference is not less than the reference temperature difference c℃, then leakage is considered to have occurred.

[0040] An electronic device, comprising:

[0041] One or more processors;

[0042] Memory, used to store one or more programs;

[0043] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for rapid testing of the thermal insulation performance of low-e refrigerator glass doors.

[0044] A computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the steps of the method for rapid testing of the thermal insulation performance of a low-e freezer glass door.

[0045] The beneficial effects of this invention are as follows:

[0046] The rapid testing method and device for the thermal insulation performance of freezer glass doors described in this application achieves the goal of rapid testing, requiring only a small amount of data and time, and can be applied to the thermal insulation performance testing of low-e glass door type freezer doors. It solves the problems of long time and slow speed in previous freezer door thermal insulation performance evaluations, and provides a convenient and efficient testing solution for rapid testing of freezer door thermal insulation performance. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the main components of the rapid testing device for the thermal insulation performance of the freezer door described in this invention;

[0048] Figure 2 This is a diagram illustrating the architecture of the rapid testing method for the thermal insulation performance of a freezer door as described in this invention.

[0049] Figure 3 This is a block diagram of the infrared temperature calibration logic described in this invention;

[0050] Figure 4 This is a logic block diagram of the leakage detection module described in this invention;

[0051] Figure 5 This is a logic block diagram of the thermal resistance determination module described in this invention.

[0052] Figure label:

[0053] 1- Freezer body, 2- Hose, 3- Air pump, 4- Differential pressure gauge, 5- Black painted metal frame, 6- PID control box, 7- Electric heating element, 8- Thermocouple, 9- Infrared thermal imager, 10- Optical vibration isolation platform. Detailed Implementation

[0054] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] like Figure 1 and Figure 2 As shown, this invention first provides a rapid testing device for the thermal insulation performance of a low-e refrigerator glass door. This device includes an internal temperature control module, an internal pressure control module, an internal and external air temperature measurement module, a door outer surface temperature measurement module, an infrared temperature calibration module, a leakage detection module, and a thermal resistance detection module.

[0056] The internal temperature control module consists of a PID control box 6 and an electric heating element 7. The PID control box 6 is mounted on the main body 1 of the freezer, and the electric heating element 7 is placed inside the freezer. It can control the stability of the air temperature inside the freezer door.

[0057] The cabinet internal pressure control module consists of an air pump 3 and a differential pressure gauge 4, which are connected to the hole in the main body of the freezer 1 via a hose 2. It can control the internal pressure to be slightly positive.

[0058] The cabinet's internal and external air temperature measurement module consists of thermocouples 8, which are arranged on both the inside and outside sides of the freezer door and are used to collect the temperature of the air inside and outside the cabinet.

[0059] The cabinet door outer surface temperature measurement module consists of an infrared thermal imager 9 and an optical vibration isolation platform 10, which is set in front of the freezer door. It is used to take infrared thermal images of the cabinet door outer surface and collect the temperature of the cabinet door outer surface.

[0060] The infrared temperature calibration module uses infrared thermogram analysis software for calibration. It is used to calibrate the temperature results of the cabinet door outer surface temperature measurement module according to the measurement method of the cabinet inside and outside air temperature measurement module, so as to unify the temperature data benchmark.

[0061] The leakage detection module is used to measure the temperature trend of the black painted metal frame 5 arranged around the freezer door seam based on the temperature results obtained by the cabinet door outer surface temperature measurement module, and to determine whether the test piece has a leak.

[0062] The thermal resistance judgment module is used to calculate the thermal resistance value of the test piece based on the temperature results obtained by the cabinet internal and external air temperature measurement module and the cabinet door external surface temperature measurement module, and to determine whether the thermal resistance value of the test piece is qualified.

[0063] like Figures 3 to 5 As shown, this invention also provides a rapid testing method for the thermal insulation performance of low-e refrigerator glass doors. Before using this rapid testing method, it is necessary to obtain the average value and standard deviation of the equivalent thermal resistance of a known qualified standard component tested using this method. Then, the equivalent thermal resistance of the test component is calculated using the hot box method measuring device to determine whether the thermal insulation performance of the test component is qualified. The rapid testing method for the thermal insulation performance of refrigerator doors includes the following steps:

[0064] S1, Pressure and Temperature Field Control: Controls the stability of air pressure and temperature inside the test piece;

[0065] S2, Collection of air temperature inside and outside the cabinet door: After the air is stabilized in step S1, the air temperature measurement module inside and outside the cabinet door is used to collect the air temperature data inside and outside the cabinet door.

[0066] S3, Cabinet door outer surface temperature acquisition: After the air is stabilized in step S1, the cabinet door outer surface temperature measurement module is used to acquire cabinet door outer surface temperature data. The acquisition time should be controlled to be the same as the acquisition time in step S2.

[0067] S4, Equivalent thermal resistance calculation: Calculate the equivalent thermal resistance of the test piece based on the air temperature data inside and outside the cabinet door obtained in step S2 and the temperature data of the outer surface of the cabinet door obtained in step S3, and judge the thermal insulation performance of the test piece based on the average value and standard deviation of the equivalent thermal resistance of the standard piece.

[0068] Preferably, in step S1, the electric heating element 7 is arranged near the freezer evaporator to facilitate the interaction between the evaporator's cooling capacity and the heating element's heat output, thereby reducing temperature fluctuations inside the freezer and improving temperature uniformity. The heat output of the electric heating element 7 is given by the PID control box 6 according to the real-time temperature inside the freezer, thus maintaining a stable air temperature inside the freezer. In step S2, the air temperature inside and outside the freezer door is measured and collected by the T-type thermocouple 8 using an Agilent multimeter.

[0069] Furthermore, before using the aforementioned rapid testing method for the insulation performance of refrigerator doors, it is necessary to obtain the average value and standard deviation of the equivalent thermal resistance of standard parts with known qualified performance tested using this method. The calculation process for the equivalent thermal resistance is as follows:

[0070] P1, input known parameters, including cold background temperature and emissivity of the outer surface of the glass door;

[0071] P2, The cabinet doors are divided into zones according to the requirements of temperature uniformity;

[0072] P3, for each partition after division, reads the air temperature inside and outside the cabinet door and the surface temperature of the cabinet door in that area;

[0073] P4 calculates and outputs the equivalent thermal resistance and leakage results of the cabinet door based on the air temperature inside and outside the cabinet door and the surface temperature of the cabinet door.

[0074] In step P1, the applicant passes Figure 3 The infrared temperature calibration procedure shown yields an emissivity of 0.7 for the outer surface of the glass door. Calibration is necessary to avoid discrepancies between thermocouple 8's temperature measurement and infrared temperature measurement (e.g., the two measurements should not differ for the same temperature). Since thermocouple 8 has been verified as accurate, the infrared temperature is corrected. For example, for a fixed constant-temperature measuring point, if thermocouple 8 measures 24.7℃, the infrared result is adjusted accordingly. Finally, it is found that when the emissivity is adjusted to 0.7, the infrared temperature is also 24.7℃. Therefore, the infrared emissivity is 0.7, and the calibration is complete.

[0075] Furthermore, step P2 includes:

[0076] P201, set the temperature fluctuation index A for air uniformity inside the cabinet door;

[0077] P202, find the boundary width B in the air temperature data inside the cabinet door where the temperature difference with the central area does not exceed A;

[0078] P203, Based on the width B, the cabinet door area is divided into 9 areas in a grid pattern, and the width of the boundary area is B;

[0079] On page 204, the cabinet door areas are numbered as Area 1 through Area 9, with Area 5 being the central area. The center point of each area is used for collecting air temperature data on the inside and outside of the cabinet door.

[0080] In step P201, the temperature fluctuation index A is selected as 1.5℃, and more preferably, it is selected as 1℃. Under this index, the applicant obtained the boundary width B as 10cm through experimental measurement.

[0081] In step P202, the boundary width B is selected as 10cm.

[0082] In step P4, the calculation method and principle of equivalent thermal resistance are as follows:

[0083] The external air temperature t1 and the internal air temperature t4 are obtained using the internal and external air temperature measurement modules; the internal air temperature t2 is obtained using the external surface temperature measurement module of the cabinet door. The heat transfer through the cabinet door can be expressed by the following formula (1):

[0084]

[0085] Where q is the amount of heat transferred per unit area through the door, k is the overall heat transfer coefficient, Δt is the overall heat transfer temperature difference, and R is the overall heat transfer thermal resistance.

[0086] The total heat transfer temperature difference consists of the temperature difference between the two sides of the door and the air, and the temperature difference between the inner and outer surfaces of the door itself.

[0087] Δt=Δt1+Δt2+Δt3 (2)

[0088] Wherein, Δt1 is the temperature difference of convective heat transfer on the outer surface of the door, Δt2 is the temperature difference of the inner and outer surfaces of the door, and Δt3 is the temperature difference of convective heat transfer on the inner surface of the door.

[0089] Similarly, the total thermal resistance consists of the convective thermal resistance between the door and the air on both sides, and the conductive thermal resistance of the door itself:

[0090] R = R1 + R2 + R3 (3)

[0091] Where R1 is the convective heat transfer thermal resistance of the outer surface of the door, R2 is the thermal resistance of the door, and R3 is the convective heat transfer thermal resistance of the inner surface of the door.

[0092] Since the heat transfer in each stage is constant, the convective heat transfer temperature difference Δt1 on the outer surface of the door, the temperature difference Δt2 on the inner and outer surfaces of the door, the convective heat transfer temperature difference Δt3 on the inner surface of the door, the convective heat transfer thermal resistance R1 on the outer surface of the door, the thermal resistance R2 of the door, the convective heat transfer thermal resistance R3 on the inner surface of the door, and the heat transfer per unit area q through the door have the relationship described in the following equation (4):

[0093]

[0094] Where Δt1 = t1 - t2, t1 is the outside air temperature, and t2 is the outside surface temperature of the door; Δt2 = t2 - t3, t3 is the inside surface temperature of the door; Δt3 = t3 - t4, t4 is the inside air temperature. The outside air temperature t1 and the inside air temperature t4 are obtained from the cabinet's inside and outside air temperature measurement module, and the outside surface temperature t2 of the door is obtained from the cabinet door's outside surface temperature measurement module. By selecting the convective thermal resistances R1 and R3, the remaining three variables q, t3, and R2 can be calculated, including the cabinet door's equivalent thermal resistance R2.

[0095] This invention, through experimental research, found that the average thermal resistance of 1.50 (m) was found in 15 sets of test results for standard parts. 2 ·℃) / W, with a standard deviation of 0.04 (m 2 The acceptable lower limit for thermal resistance is "average thermal resistance - 3 * standard deviation of thermal resistance" (°C) / W. Therefore, the acceptable lower limit for thermal resistance of this batch of cabinet doors is 1.38 (m). 2 ·℃) / W.

[0096] Furthermore, in step P4, the cabinet door leakage detection method is as follows: based on the cabinet door surface temperature data, extract the temperature trend of the cabinet door edge; for all temperature points on each cabinet door edge, if the maximum temperature difference is less than the reference temperature difference c℃, the cabinet door is considered to be well sealed; if the maximum temperature difference is not less than the reference temperature difference c℃, a leak is considered to have occurred.

[0097] The reference temperature difference value c is taken as 2.

[0098] Verification shows that the low-e glass door in this application can achieve thermal stability within 7 minutes after replacement, and the testing speed meets the usage requirements.

[0099] An electronic device, comprising:

[0100] One or more processors;

[0101] Memory, used to store one or more programs;

[0102] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for rapid testing of the thermal insulation performance of low-e refrigerator glass doors.

[0103] A computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the steps of the method for rapid testing of the thermal insulation performance of a low-e freezer glass door.

[0104] In summary, the method and apparatus for testing the thermal insulation performance of low-e transparent glass doors described in this application achieve fast testing speed and require less data, solving the problems of long testing time and slow speed in previous evaluations of the thermal insulation performance of freezer doors, and providing a convenient and efficient testing solution for rapid testing of the thermal insulation performance of freezer doors.

[0105] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0106] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A testing method for a rapid testing device for the thermal insulation performance of a low-e refrigerator glass door, characterized in that, The detection device includes an internal temperature control module, an internal pressure control module, an internal and external air temperature measurement module, an external surface temperature measurement module for the cabinet door, an infrared temperature calibration module, a leakage detection module, and a thermal resistance detection module. The cabinet temperature control module consists of a PID control box (6) and an electric heating element (7), and is used to control the stability of the air temperature inside the cabinet door. The cabinet pressure control module consists of an air pump (3) and a differential pressure gauge (4), which are connected to the hole in the main body (1) of the freezer via a hose (2) to control the pressure inside the cabinet to be slightly positive. The air temperature measurement module inside and outside the cabinet is composed of thermocouples (8), which are arranged on both sides of the freezer door to collect the air temperature inside and outside the cabinet. The cabinet door outer surface temperature measurement module consists of an infrared thermal imager (9) and an optical vibration isolation platform (10), which is set in front of the freezer door to capture infrared thermal images of the cabinet door outer surface and collect the temperature of the cabinet door outer surface. The infrared temperature calibration module is used to calibrate the temperature results of the cabinet door outer surface temperature measurement module according to the measurement method of the cabinet inside and outside air temperature measurement module, so as to unify the temperature data benchmark. The leakage judgment module is used to measure the temperature trend of the edge of the freezer door where the black painted metal frame (5) arranged around the freezer door seam is located based on the temperature result obtained by the outer surface temperature measurement module of the cabinet door, and to determine whether the test piece has a leak. The thermal resistance judgment module is used to calculate the thermal resistance value of the test piece based on the temperature results obtained by the cabinet internal and external air temperature measurement module and the cabinet door outer surface temperature measurement module, and to determine whether the thermal resistance value of the test piece is qualified. The method specifically includes the following steps: (1) Obtain the average value and standard deviation of the equivalent thermal resistance of the standard parts with known qualified performance before testing, and then calculate the equivalent thermal resistance of the test parts using the hot box method measurement device to determine whether the thermal insulation performance of the test parts is qualified; before using the rapid testing method for the thermal insulation performance of the freezer door, it is necessary to obtain the average value and standard deviation of the equivalent thermal resistance of the standard parts with known qualified performance tested using this method. The calculation process of the equivalent thermal resistance is as follows: (2.1) Input known parameters, including cold background temperature and emissivity of the outer surface of the glass door; (2.2) Divide the cabinet doors into zones according to the requirements of temperature uniformity; (2.3) For each zone, read the air temperature inside and outside the cabinet door and the surface temperature of the cabinet door for that zone; (2.4) Calculate and output the equivalent thermal resistance and leakage results of the cabinet door based on the air temperature inside and outside the cabinet door and the surface temperature of the cabinet door; the calculation method and principle of the equivalent thermal resistance are as follows: The external air temperature is obtained using the internal and external air temperature measurement module. Air temperature inside the cabinet The cabinet door outer surface temperature measurement module obtains the air temperature inside the cabinet. The heat transfer through the cabinet door can be expressed by the following formula: ； In the formula, Heat transfer per unit area, in units of ; This is the heat transfer coefficient, in units of... ; Temperature difference, unit: ; For total heat transfer resistance, The unit is ; Since the heat transfer at each stage is constant, therefore: ； In the formula, For the surface convective heat transfer temperature difference, The unit is ; The external convective heat transfer thermal resistance is expressed in units of 1. ; For the temperature difference between the inside and outside of the box, The unit is ; The thermal resistance of the enclosure is expressed in units of Ω. ; The temperature difference is due to convective heat transfer on the inner surface. The unit is ; The temperature of the inner surface of the door; The internal surface convective heat transfer thermal resistance, in units of ; The outside air temperature can be obtained from the test data. Inner air temperature Temperature of the outer surface of the cabinet door Combined with convective thermal resistance , The remaining three variables can then be calculated. , , This includes the equivalent thermal resistance of the cabinet door. ;; (2) Pressure and temperature field control: control the air pressure and temperature inside the test piece to ensure stability; (3) Collection of air temperature inside and outside the cabinet door: After the air is stabilized in step (1), the air temperature data inside and outside the cabinet door is collected using the air measurement module inside and outside the cabinet door. (4) Cabinet door outer surface temperature acquisition: After the air is stabilized in step (1), the cabinet door outer surface temperature measurement module is used to acquire the cabinet door outer surface temperature data. The acquisition time should be controlled to match the acquisition time in step S2. (5) Equivalent thermal resistance calculation: The equivalent thermal resistance of the test piece is calculated based on the air temperature data inside and outside the cabinet door obtained in step (2) and the temperature data of the outer surface of the cabinet door obtained in step (3). The thermal insulation performance of the test piece is judged based on the average value and standard deviation of the equivalent thermal resistance of the standard piece.

2. The method for rapid testing of the thermal insulation performance of a low-e refrigerator glass door according to claim 1, characterized in that, Step (2.2) includes: (2.2.1) Set the uniform air temperature index A inside the cabinet door; (2.2.2) Find the boundary width B in the air temperature data inside the cabinet door where the temperature difference with the central area does not exceed A; (2.2.3) Based on the width B, the cabinet door area is divided into 9 areas in a grid pattern, and the width of the boundary area is B; (2.2.4) The cabinet door areas are numbered from Area 1 to Area 9, with Area 5 being the central area; the center point of each area is used to collect the air temperature inside and outside the cabinet door.

3. The method for rapid testing of the thermal insulation performance of a low-e refrigerator glass door according to claim 1, characterized in that, In step (2.4), the cabinet door leakage detection method is as follows: based on the cabinet door surface temperature data, extract the temperature trend of the cabinet door edge, and for all temperature points on each cabinet door edge, if the maximum temperature difference is less than the reference temperature difference c℃, the cabinet door is considered to be well sealed; if the maximum temperature difference is not less than the reference temperature difference c℃, a leak is considered to have occurred.

4. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of claims 1-3.

5. A computer-readable storage medium storing computer instructions thereon, characterized in that, When executed by the processor, this instruction implements the steps of the method as described in any one of claims 1-3.

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