A nonlinear temperature reduction control method, device and system based on environmental test chamber

Abstract

The present invention discloses a nonlinear cooling control method, device and system based on an environmental test chamber. The temperature description information corresponding to the environmental test chamber is obtained; the total cooling range and the average cooling rate are calculated according to the temperature description information; the number of cooling calculations is determined according to the cooling accuracy, and at least two pairs of cooling description information consisting of cooling time and cooling rate are calculated according to the cooling calculation number, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; the electronic expansion valve opening and the evaporator fan speed are calculated according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed. The problem that the product cannot be accurately controlled by nonlinear cooling is solved, the accuracy and precision of the nonlinear cooling control are improved, and the ability to accurately judge the reliability of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental test equipment data processing, and in particular to a nonlinear temperature reduction control method, device and system based on an environmental test chamber. Background Art

[0002] With the advancement of life and technology, the requirements for product reliability are getting higher and higher. In many fields, it is necessary to test the reliability, material stress changes, and changes in material properties of products or components when they are cooled from high temperature to low temperature within a certain period of time.

[0003] In the process of realizing the present invention, the inventors found that the prior art has the following defects: At present, the linear cooling time is controllable, for example, the linear cooling from 120°C to -40°C at a rate of 16°C / min, then the cooling time is 10 minutes. However, for nonlinear cooling, the cooling is generally carried out according to the maximum capacity of the equipment, and the cooling time is uncontrollable. Generally, the cooling time is less than the required cooling time, which will affect the accurate judgment of the reliability of the product or component. Therefore, it is very important to be able to accurately control the environmental test chamber during the nonlinear cooling process. Summary of the invention

[0004] The present invention provides a nonlinear temperature reduction control method, device and system based on an environmental test chamber, so as to improve the accuracy and precision of the nonlinear temperature reduction control and improve the ability to accurately judge the reliability of the product.

[0005] According to one aspect of the present invention, a nonlinear temperature reduction control method based on an environmental test chamber is provided, which includes:

[0006] Obtain temperature description information corresponding to the environmental test chamber; wherein the temperature description information includes at least one of the following: starting temperature, ending temperature, total cooling time and cooling accuracy;

[0007] According to the temperature description information, the total cooling range and the average cooling rate are calculated;

[0008] According to the cooling accuracy, the number of cooling calculations is determined, and according to the number of cooling calculations, the total cooling range and the average cooling rate, at least two pairs of cooling description information consisting of cooling time and cooling rate are calculated by a pre-constructed nonlinear control calculation method;

[0009] According to each of the cooling description information, the electronic expansion valve opening and the evaporator fan speed are calculated respectively to achieve nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0010] According to another aspect of the present invention, a nonlinear temperature reduction control device based on an environmental test chamber is provided, comprising:

[0011] The temperature description information acquisition module is used to obtain the temperature description information corresponding to the environmental test chamber; wherein the temperature description information includes at least one of the following: starting temperature, ending temperature, total cooling time and cooling accuracy;

[0012] A total cooling range and average cooling rate calculation module, used to calculate the total cooling range and average cooling rate according to the temperature description information;

[0013] A cooling description information calculation module is used to determine the number of cooling calculations according to the cooling accuracy, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate according to the number of cooling calculations, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method;

[0014] The electronic expansion valve opening and evaporator fan speed calculation module is used to calculate the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0015] According to another aspect of the present invention, there is provided an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the nonlinear temperature reduction control method based on an environmental test chamber as described in any embodiment of the present invention when executing the computer program.

[0016] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the nonlinear temperature reduction control method based on an environmental test chamber described in any embodiment of the present invention when executed.

[0017] According to another aspect of the present invention, a nonlinear temperature reduction control system based on an environmental test chamber is provided, wherein the system comprises: a temperature sensor in the environmental test chamber, an electronic expansion valve, an evaporator fan, an evaporator, an evaporator fan speed control module, a valve opening control module and a collection nonlinear calculation control module;

[0018] Wherein, the acquisition nonlinear calculation control module is used to execute the nonlinear temperature reduction control method based on the environmental test chamber as described in any embodiment of the present invention;

[0019] The temperature sensor in the environmental test box is used to collect temperature description information corresponding to the environmental test box and send the temperature description information to the acquisition nonlinear calculation control module;

[0020] The valve opening control module is used to receive the electronic expansion valve opening sent by the acquisition nonlinear calculation control module, and control the valve opening of the electronic expansion valve according to the electronic expansion valve opening;

[0021] The evaporator fan speed control module is used to receive the evaporator fan speed sent by the acquisition nonlinear calculation control module, and control the speed of the evaporator fan corresponding to the evaporator according to the evaporator fan speed;

[0022] The electronic expansion valve is used to receive instructions from the valve opening control module to adjust the valve opening of the electronic expansion valve;

[0023] The evaporator is used to receive instructions from the evaporator fan speed control module to adjust the speed of the evaporator fan corresponding to the evaporator.

[0024] The technical solution of the embodiment of the present invention obtains the temperature description information corresponding to the environmental test box; calculates the total cooling range and the average cooling rate according to the temperature description information; determines the number of cooling calculations according to the cooling accuracy, and calculates at least two pairs of cooling description information consisting of cooling time and cooling rate according to the cooling calculation number, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; and calculates the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed. The problem of being unable to accurately perform nonlinear cooling control on the product is solved, the accuracy and precision of nonlinear cooling control are improved, and the ability to accurately judge the reliability of the product is improved.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1is a flow chart of a nonlinear temperature reduction control method based on an environmental test chamber provided according to Embodiment 1 of the present invention;

[0028] Figure 2a is a flow chart of another nonlinear temperature reduction control method based on an environmental test chamber provided according to the second embodiment of the present invention;

[0029] Figure 2b is a schematic diagram of the structure of the temperature reduction calculation in the method provided in the second embodiment of the present invention;

[0030] Figure 3 is a structural schematic diagram of a nonlinear temperature reduction control device based on an environmental test chamber provided according to Embodiment 3 of the present invention;

[0031] Figure 4 is a schematic diagram of the structure of an electronic device provided according to a fourth embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a nonlinear temperature reduction control system based on an environmental test chamber provided according to Embodiment 6 of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "target", "current", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Embodiment 1

[0036] Figure 1A flow chart of a nonlinear temperature reduction control method based on an environmental test chamber is provided for Embodiment 1 of the present invention. This embodiment can be applied to the situation where nonlinear temperature control is implemented in an environmental test chamber. The method can be executed by a nonlinear temperature reduction control device based on an environmental test chamber. The nonlinear temperature reduction control device based on an environmental test chamber can be implemented in the form of hardware and / or software.

[0037] Correspondingly, such as Figure 1 As shown, the method includes:

[0038] S110, obtaining temperature description information corresponding to the environmental test chamber.

[0039] The temperature description information includes at least one of the following: starting temperature, ending temperature, total cooling time and cooling accuracy.

[0040] The environmental description information may be information describing parameters of the temperature in the environmental test chamber.

[0041] In this embodiment, it is necessary to obtain temperature description information of the target environmental test box, and the temperature description information includes a starting temperature, an ending temperature, a total cooling time, and a cooling accuracy.

[0042] For example, it is assumed that the starting temperature corresponding to the environmental test box is A°C, the ending temperature is B°C, the total cooling time is T, and the cooling accuracy is 0.5.

[0043] S120. Calculate a total cooling range and an average cooling rate according to the temperature description information.

[0044] The total temperature reduction range may be the size of the temperature reduction range of the environmental test chamber from the start of temperature reduction to the end of temperature reduction. The average temperature reduction rate may be the size of the average temperature reduction rate.

[0045] Optionally, calculating a total cooling range and an average cooling rate based on the temperature description information includes: calculating the total cooling range by subtracting the ending temperature from the starting temperature; and calculating the average cooling rate based on the total cooling range and the total cooling time.

[0046] Continuing with the previous example, since the starting temperature is A℃, the ending temperature is B℃, and the total cooling time is T, the total cooling range can be calculated to be (AB)℃, and the average cooling rate can be calculated to be

[0047] In this embodiment, the total cooling range and the average cooling rate can be calculated based on the acquired starting temperature, ending temperature and total cooling time, so that nonlinear cooling control can be performed more accurately.

[0048] S130. Determine the number of cooling calculations according to the cooling accuracy, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate according to the number of cooling calculations, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method.

[0049] The number of temperature reduction calculations may be the number of times the temperature reduction needs to be calculated, and the number of temperature reduction calculations is associated with the temperature reduction accuracy. The finer the temperature reduction accuracy, the more temperature reduction calculations are required; conversely, the coarser the temperature reduction accuracy, the fewer temperature reduction calculations are required.

[0050] Specifically, the cooling time may be the cooling time corresponding to each cooling section, and the cooling rate may be the cooling rate corresponding to each cooling section.

[0051] In addition, assuming that the cooling calculation times are determined to be 1, the cooling is divided into two cooling sections. It is necessary to calculate two pairs of cooling description information consisting of cooling time and cooling rate according to the total cooling range and average cooling rate through a pre-constructed nonlinear control calculation method. Among them, each cooling section corresponds to a pair of cooling description information.

[0052] Optionally, determining the number of temperature reduction calculations based on the temperature reduction accuracy includes: acquiring the temperature reduction accuracy; matching the temperature reduction accuracy with a pre-constructed temperature reduction number mapping table to determine the number of temperature reduction calculations.

[0053] In this embodiment, it is necessary to obtain in advance the historical cooling accuracy and the historical cooling calculation times corresponding to the historical cooling accuracy, and to perform statistics and construct a cooling times mapping table based on the historical cooling accuracy and the historical cooling calculation times.

[0054] Specifically, after obtaining the current temperature reduction accuracy, it is necessary to match the temperature reduction accuracy with the temperature reduction times mapping table, so as to obtain the temperature reduction calculation times corresponding to the temperature reduction accuracy.

[0055] Continuing with the previous example, assuming that the temperature reduction accuracy is 0.5, it can be assumed that in the temperature reduction times mapping table, when the temperature reduction accuracy is 0.5, the corresponding temperature reduction calculation times is 4 times.

[0056] S140. Calculate the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0057] The electronic expansion valve opening can be used to describe the opening of the electronic expansion valve, and the temperature reduction of the environmental test chamber is controlled by controlling the opening of the electronic expansion valve. The evaporator fan speed can be used to describe the speed of the evaporator fan.

[0058] In this embodiment, it is necessary to perform nonlinear cooling control operations on the environmental test chamber based on the calculated electronic expansion valve opening and evaporator fan speed, and the electronic expansion valve opening is controlled and processed by a valve opening control module, and the evaporator fan speed is controlled and processed by an evaporator fan speed control module.

[0059] The technical solution of the embodiment of the present invention obtains the temperature description information corresponding to the environmental test box; calculates the total cooling range and the average cooling rate according to the temperature description information; determines the number of cooling calculations according to the cooling accuracy, and calculates at least two pairs of cooling description information consisting of cooling time and cooling rate according to the cooling calculation number, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; and calculates the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed. The problem of being unable to accurately perform nonlinear cooling control on the product is solved, the accuracy and precision of nonlinear cooling control are improved, and the ability to accurately judge the reliability of the product is improved.

[0060] Embodiment 2

[0061] Figure 2a A flow chart of another nonlinear cooling control method based on an environmental test chamber is provided for Embodiment 2 of the present invention. This embodiment is refined on the basis of the above embodiments. In this embodiment, at least two pairs of cooling description information consisting of cooling time and cooling rate are calculated based on the cooling calculation times, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method, and further refined.

[0062] Correspondingly, such as Figure 2a As shown, the method includes:

[0063] S210, obtaining temperature description information corresponding to the environmental test chamber.

[0064] S220. Calculate a total cooling range and an average cooling rate according to the temperature description information.

[0065] S230: Determine the number of temperature reduction calculations according to the temperature reduction accuracy.

[0066] S240. According to the number of temperature reduction calculations, the number of temperature value points corresponding to each temperature reduction calculation is calculated respectively, and the temperature value corresponding to each temperature value point is obtained respectively.

[0067] In this embodiment, the number of temperature value points corresponding to each cooling calculation needs to be determined according to the number of cooling calculations. For example, the number of cooling calculations is 4. The number of temperature value points corresponding to the first cooling calculation is 1; the number of temperature value points corresponding to the second cooling calculation is 2; the number of temperature value points corresponding to the third cooling calculation is 4; the number of temperature value points corresponding to the fourth cooling calculation is 8.

[0068] In addition, assuming that the number of cooling calculations is n, the number of temperature value points corresponding to the nth cooling calculation is 2 n -1 Furthermore, it is necessary to obtain the size of the temperature value corresponding to each temperature value point.

[0069] Optionally, the temperature values ​​corresponding to each temperature value point are obtained respectively, including: if the current cooling calculation is not the first cooling calculation, obtaining the cooling rate corresponding to each cooling segment in the previous cooling calculation corresponding to the current cooling calculation; determining the temperature point in each previous cooling segment corresponding to the current cooling calculation when the instantaneous cooling rate is equal to the cooling rate of each cooling segment; the calculated temperature point in each previous cooling segment is the temperature segmentation point corresponding to the current cooling calculation.

[0070] The current instantaneous cooling rate may be a value describing the magnitude of the instantaneous cooling rate in the current cooling section.

[0071] Optionally, if the current cooling calculation is the first cooling calculation, a current instantaneous cooling rate equal to the average cooling rate is obtained, and a temperature value corresponding to a temperature value point in the current cooling section is calculated based on the current instantaneous cooling rate.

[0072] In addition, assuming that the number of corresponding temperature value points for the first cooling calculation is 1, the cooling process needs to be divided into two cooling sections according to the cooling value point, namely cooling section Z1 and cooling section Z2, and in the cooling process, determine the temperature value at which the instantaneous cooling rate is equal to the average cooling rate, and use this temperature value as the temperature value corresponding to the temperature value point.

[0073] Assuming the second cooling calculation, the cooling time T1 and cooling rate V1 corresponding to the cooling section Z1 are calculated after the first cooling calculation; and the cooling time T2 and cooling rate V2 corresponding to the cooling section Z2 are calculated. Determine the temperature points corresponding to the current instantaneous cooling rate 1 equal to the cooling rate V1 and the current instantaneous cooling rate 2 equal to the cooling rate V2.

[0074] Because of the second cooling calculation, the number of corresponding temperature value points is 2 (temperature points W 21 and temperature point W 22 ), that is, the cooling section Z1 is divided into the cooling section Z11 And cooling section Z 12 ; and the cooling section Z2 is divided into the cooling section Z 21 And cooling section Z 22 It is understandable that the temperature point W 21 The temperature value corresponding to the current instantaneous cooling rate 1 is equal; the temperature point W 22 It is equal to the temperature value corresponding to the current instantaneous cooling rate 2.

[0075] S250, respectively obtaining each cooling section corresponding to each cooling calculation, and determining the cooling section starting temperature and cooling section ending temperature corresponding to each cooling section according to each temperature value, starting temperature and ending temperature.

[0076] The starting temperature of the cooling segment may be the initial temperature of each cooling segment, and the ending temperature of the cooling segment may be the ending temperature of each cooling segment.

[0077] Continuing with the previous example, assuming that the first cooling calculation corresponds to a cooling value point, the cooling value point corresponds to a cooling value, and the cooling value is assumed to be C℃. Then the cooling segment starting temperature corresponding to the cooling segment Z1 is A℃ and the cooling segment ending temperature is C℃; the cooling segment starting temperature corresponding to the cooling segment Z2 is C℃ and the cooling segment ending temperature is B℃.

[0078] S260, obtaining the total cooling time, and according to the cooling segment starting temperature, the cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate, calculating at least two pairs of cooling description information consisting of the cooling time and the cooling rate corresponding to each cooling calculation through a pre-constructed nonlinear control calculation method.

[0079] Optionally, the at least two pairs of cooling description information consisting of cooling time and cooling rate corresponding to each cooling calculation are calculated according to the cooling segment starting temperature, the cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method, including: at least one cooling description parameter corresponding to each cooling calculation is calculated according to the cooling segment starting temperature, the cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; the cooling time corresponding to each cooling segment in each cooling calculation is calculated according to each cooling description parameter and the total cooling time; the cooling rate corresponding to each cooling segment in each cooling calculation is calculated according to each cooling description parameter, the total cooling time, the cooling segment starting temperature and the cooling segment ending temperature; wherein, at least two pairs of cooling description information consisting of cooling time and cooling rate correspond to each cooling calculation.

[0080] The cooling description parameters are parameters calculated by a pre-constructed nonlinear control calculation method according to the differences in the cooling segment starting temperature, the cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate.

[0081] For example, Figure 2b The figure shows the schematic diagram of the cooling calculation. In the first cooling calculation, between A and B, the corresponding intermediate segment temperature value when the instantaneous cooling rate is equal to the average cooling rate V is defined as C. The total cooling range can be determined based on the starting temperature A and the ending temperature B.

[0082] Furthermore, the cooling section may be divided into two sections, namely, cooling section Z1: A-C; and cooling section Z2: C-B.

[0083] Specifically, the calculation process of the cooling time and cooling rate of sections A to C is as follows: 11 =F1(1A,B,T), where T represents the total cooling time, F 11 is the description function of the current time period, then the cooling description parameter C corresponding to the current cooling calculation can be calculated 11 In addition, the temperature value can be calculated by the following formula, and the temperature value is defined as P 11 , that is Specifically, C can be calculated by the following formula 11 The calculation of Here, A can represent the starting temperature of the cooling section, B can represent the ending temperature of the cooling section, and T can represent the total time of the cooling section.

[0084] Correspondingly, according to the temperature drop description parameter C 11 , total cooling time T and temperature value P 11 , calculate the cooling time 1 corresponding to the cooling section Z1 (such as Figure 2b T1 in the figure); according to the temperature drop description parameter C 11 , total cooling time T, A and C, to calculate the cooling rate V1 corresponding to the cooling section Z1.

[0085] Further, after the cooling time T1 of the cooling section Z1 is determined, the cooling time T2 corresponding to the cooling section Z2 is determined by subtracting the cooling time T1 from the total cooling time (eg, Figure 2b Then, according to C, B and the temperature-falling description parameters, the temperature-falling rate V2 is calculated.

[0086] Similarly, after the first cooling calculation is completed, the second cooling calculation is performed. The number of temperature value points corresponding to the second cooling calculation is 2. First, it is necessary to determine the instantaneous cooling rate 1 equal to the cooling rate V1 in the cooling section Z1, corresponding to the temperature point W21 (can be set to D), and determine the instantaneous cooling rate 2 equal to the cooling rate V2 in the cooling section Z2, corresponding to the temperature point W 22 (It can be set to E). Therefore, the cooling section can be divided into four sections, namely, cooling section Z 21 :A~D;Temperature reduction section Z 22 :D~C;Temperature reduction section Z 23 :C~E; cooling section Z 24 :E~B. Similarly, the corresponding cooling time and cooling rate can be calculated, that is, each cooling time corresponds to Figure 2b T 21 , T 22 , T 23 , T 24 .

[0087] Similarly, after the n-1th cooling calculation, the nth cooling calculation is performed. The number of temperature value points corresponding to the nth cooling calculation is 2 n-1 The cooling stage is divided into 2 n part.

[0088] In addition, assuming the starting temperature is T0 and the ending temperature is T SV After n calculations, T0~T SV The total is divided into 2 n Segment, a total of 2 inserted n -1 point. And T0~T SV The order of the points is T0, T (n)1 , T (n-1)1 , T (n)2 , T (n-2)1 , T (n)3 , T (n-1)2 ,…,T 11 , …、 and T SV .

[0089] S270. Calculate the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0090] Optionally, the electronic expansion valve opening and the evaporator fan speed are calculated respectively according to each of the cooling description information, including: in each cooling calculation, obtaining the cooling time, cooling rate and temperature value corresponding to each cooling section; calculating the electronic expansion valve opening corresponding to each cooling section according to the cooling time, the cooling rate, the temperature value, the starting temperature, the ending temperature and the total cooling time; calculating the evaporator fan speed corresponding to each cooling section according to the electronic expansion valve opening, the cooling time, the cooling rate and the temperature value.

[0091] For example, for the cooling section with a starting temperature A and an ending temperature B, the electronic expansion valve opening E1 can be calculated by the following formula, specifically: That is to say Among them, n means that the temperature-lowering section is calculated n times, and Δt represents the time variable of each temperature-lowering section.

[0092] Furthermore, the calculation of the opening degree of the electronic expansion valve calculated for the n-th cooling stage is specifically as follows:

[0093] In this embodiment, after multiple temperature reduction calculations, the corresponding temperature reduction time and temperature reduction rate are calculated for each temperature reduction section. Further, the corresponding electronic expansion valve opening is calculated based on the temperature value, the starting temperature, the ending temperature and the total temperature reduction time. Accordingly, the evaporator fan speed is calculated based on the calculated electronic expansion valve opening.

[0094] For example, for the cooling section with a starting temperature A and an ending temperature B, the evaporator fan speed R1 can be calculated by the following formula, specifically: That is to say

[0095] Furthermore, the calculation of the evaporator fan speed for n cooling stages is as follows:

[0096] In addition, in the process of calculating the electronic expansion valve opening and the evaporator fan speed, it is necessary to obtain the corresponding description function for weighted processing, so as to obtain more accurate electronic expansion valve opening and evaporator fan speed, thereby realizing the nonlinear control operation of the environmental test chamber and further accurately controlling the cooling time.

[0097] The technical solution of the embodiment of the present invention is to obtain the temperature description information corresponding to the environmental test box; calculate the total cooling range and the average cooling rate according to the temperature description information; determine the number of cooling calculations according to the cooling accuracy, and calculate the number of temperature value points corresponding to each cooling calculation according to the number of cooling calculations, and obtain the temperature values ​​corresponding to each temperature value point; obtain each cooling segment corresponding to each cooling calculation, and determine the cooling segment starting temperature and cooling segment ending temperature corresponding to each cooling segment according to each temperature value, starting temperature and ending temperature; obtain the total cooling time, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate corresponding to each cooling calculation through a pre-constructed nonlinear control calculation method according to the cooling segment starting temperature, cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate; calculate the electronic expansion valve opening and the evaporator fan speed according to each cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed. The problem of being unable to accurately perform nonlinear temperature reduction control on the product is solved, the accuracy and precision of nonlinear temperature reduction control are improved, and the ability to accurately judge product reliability is improved.

[0098] Embodiment 3

[0099] Figure 3 This is a schematic diagram of the structure of a nonlinear temperature reduction control device based on an environmental test chamber provided in the third embodiment of the present invention. The nonlinear temperature reduction control device based on an environmental test chamber provided in this embodiment can be implemented by software and / or hardware, and can be configured in a terminal device or a server to implement a nonlinear temperature reduction control method based on an environmental test chamber in the embodiment of the present invention. Figure 3 As shown, the device includes: a temperature description information acquisition module 310, a total cooling range and average cooling rate calculation module 320, a cooling description information calculation module 330 and an electronic expansion valve opening and evaporator fan speed calculation module 340.

[0100] The temperature description information acquisition module 310 is used to acquire the temperature description information corresponding to the environmental test chamber; wherein the temperature description information includes at least one of the following: starting temperature, ending temperature, total cooling time and cooling accuracy;

[0101] A total cooling range and average cooling rate calculation module 320, used to calculate the total cooling range and average cooling rate according to the temperature description information;

[0102] A cooling description information calculation module 330 is used to determine the number of cooling calculations according to the cooling accuracy, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate according to the number of cooling calculations, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method;

[0103] The electronic expansion valve opening and evaporator fan speed calculation module 340 is used to calculate the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0104] The technical solution of the embodiment of the present invention obtains the temperature description information corresponding to the environmental test box; calculates the total cooling range and the average cooling rate according to the temperature description information; determines the number of cooling calculations according to the cooling accuracy, and calculates at least two pairs of cooling description information consisting of cooling time and cooling rate according to the cooling calculation number, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; and calculates the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed. The problem of being unable to accurately perform nonlinear cooling control on the product is solved, the accuracy and precision of nonlinear cooling control are improved, and the ability to accurately judge the reliability of the product is improved.

[0105] Optionally, the total cooling range and average cooling rate calculation module 320 can be specifically used to: calculate the total cooling range by subtracting the ending temperature from the starting temperature; and calculate the average cooling rate based on the total cooling range and the total cooling time.

[0106] Optionally, the cooling description information calculation module 330 may be specifically used to: obtain the cooling accuracy; match the cooling accuracy with a pre-constructed cooling times mapping table to determine the cooling calculation times.

[0107] Optionally, the cooling description information calculation module 330 can be specifically used to: calculate the number of temperature value points corresponding to each cooling calculation according to the number of cooling calculations, and obtain the temperature values ​​corresponding to each temperature value point; obtain the cooling segments corresponding to each cooling calculation, and determine the cooling segment starting temperature and cooling segment ending temperature corresponding to each cooling segment according to each temperature value, starting temperature and ending temperature; obtain the total cooling time, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate corresponding to each cooling calculation according to the cooling segment starting temperature, cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method.

[0108] Optionally, the cooling description information calculation module 330 can also be specifically used for: calculating at least one cooling description parameter corresponding to each cooling calculation according to the cooling segment starting temperature, the cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; calculating the cooling time corresponding to each cooling segment in each cooling calculation according to each cooling description parameter and the total cooling time; calculating the cooling rate corresponding to each cooling segment in each cooling calculation according to each cooling description parameter, the total cooling time, the cooling segment starting temperature and the cooling segment ending temperature; wherein, each cooling calculation corresponds to at least two pairs of cooling description information consisting of cooling time and cooling rate.

[0109] Optionally, the cooling description information calculation module 330 can also be specifically used for: if the current cooling calculation is not the first cooling calculation, obtaining the cooling rate corresponding to each cooling segment in the previous cooling calculation corresponding to the current cooling calculation; determining the temperature point in each previous cooling segment corresponding to the current cooling calculation when the instantaneous cooling rate is equal to the cooling rate of each cooling segment; the calculated temperature point in each previous cooling segment is the temperature segmentation point corresponding to the current cooling calculation.

[0110] Optionally, the electronic expansion valve opening and evaporator fan speed calculation module 340 can be specifically used for: in each cooling calculation, obtaining the cooling time, cooling rate and temperature value corresponding to each cooling section; calculating the electronic expansion valve opening corresponding to each cooling section according to the cooling time, the cooling rate, the temperature value, the starting temperature, the ending temperature and the total cooling time; calculating the evaporator fan speed corresponding to each cooling section according to the electronic expansion valve opening, the cooling time, the cooling rate and the temperature value.

[0111] The nonlinear temperature reduction control device based on the environmental test chamber provided in the embodiment of the present invention can execute the nonlinear temperature reduction control method based on the environmental test chamber provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0112] Embodiment 4

[0113] Figure 4 A schematic diagram of the structure of an electronic device 10 that can be used to implement the fourth embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0114] like Figure 4 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0115] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0116] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a nonlinear temperature reduction control method based on an environmental test chamber.

[0117] In some embodiments, the nonlinear temperature reduction control method based on the environmental test chamber can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the nonlinear temperature reduction control method based on the environmental test chamber described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to execute the nonlinear temperature reduction control method based on the environmental test chamber in any other appropriate manner (for example, by means of firmware).

[0118] The method comprises: obtaining temperature description information corresponding to an environmental test box; calculating a total cooling range and an average cooling rate according to the temperature description information; determining the number of cooling calculations according to the cooling accuracy, and calculating at least two pairs of cooling description information consisting of cooling time and cooling rate according to the number of cooling calculations, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; and respectively calculating an electronic expansion valve opening and an evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0119] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0120] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0121] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0122] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0123] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0124] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0125] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0126] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0127] Embodiment 5

[0128] Embodiment 5 of the present invention also provides a computer-readable storage medium, wherein the computer-readable instructions are used to execute a nonlinear cooling control method based on an environmental test chamber when executed by a computer processor, the method comprising: obtaining temperature description information corresponding to the environmental test chamber; calculating the total cooling range and the average cooling rate according to the temperature description information; determining the number of cooling calculations according to the cooling accuracy, and calculating at least two pairs of cooling description information consisting of cooling time and cooling rate according to the number of cooling calculations, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; and calculating the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed.

[0129] Of course, the computer-readable storage medium provided in an embodiment of the present invention has computer executable instructions that are not limited to the method operations described above, and can also execute related operations in the nonlinear temperature reduction control method based on the environmental test chamber provided in any embodiment of the present invention.

[0130] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk or an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0131] It is worth noting that in the above-mentioned embodiment of the nonlinear temperature reduction control device based on the environmental test chamber, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0132] Embodiment 6

[0133] Figure 5It is a structural schematic diagram of a nonlinear temperature reduction control system based on an environmental test chamber according to Embodiment 6 of the present invention. The nonlinear temperature reduction control system based on the environmental test chamber comprises: a temperature sensor 510 in the environmental test chamber, an electronic expansion valve 520, an evaporator fan 530, an evaporator 540, an evaporator fan speed control module 550, a valve opening control module 560 and a collection nonlinear calculation control module 570;

[0134] The acquisition nonlinear calculation control module 570 is used to execute the nonlinear temperature reduction control method based on the environmental test chamber as described in any embodiment of the present invention;

[0135] The temperature sensor 510 in the environmental test box is used to collect temperature description information corresponding to the environmental test box and send the temperature description information to the acquisition nonlinear calculation control module 570;

[0136] The valve opening control module 560 is used to receive the electronic expansion valve opening sent by the acquisition nonlinear calculation control module 570, and control the valve opening of the electronic expansion valve 520 according to the electronic expansion valve opening;

[0137] The evaporator fan speed control module 550 is used to receive the evaporator fan speed sent by the acquisition nonlinear calculation control module 570, and control the speed of the evaporator fan 530 corresponding to the evaporator 540 according to the evaporator fan speed;

[0138] The electronic expansion valve 520 is used to receive instructions from the valve opening control module 560 to adjust the valve opening of the electronic expansion valve 520;

[0139] The evaporator 540 is used to receive instructions from the evaporator fan speed control module 550 to adjust the speed of the evaporator fan 530 corresponding to the evaporator 540 .

[0140] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A nonlinear temperature reduction control method based on an environmental test chamber, characterized in that: include: Obtain temperature description information corresponding to the environmental test chamber; wherein the temperature description information includes at least one of the following: starting temperature, ending temperature, total cooling time and cooling accuracy; According to the temperature description information, the total cooling range and the average cooling rate are calculated; According to the cooling accuracy, the number of cooling calculations is determined, and according to the number of cooling calculations, the total cooling range and the average cooling rate, at least two pairs of cooling description information consisting of cooling time and cooling rate are calculated by a pre-constructed nonlinear control calculation method; According to each of the cooling description information, the electronic expansion valve opening and the evaporator fan speed are calculated respectively, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed; Wherein, according to the number of cooling calculations, the total cooling range and the average cooling rate, at least two pairs of cooling description information consisting of cooling time and cooling rate are calculated by a pre-constructed nonlinear control calculation method, including: according to the number of cooling calculations, the number of temperature value points corresponding to each cooling calculation is calculated respectively, and the temperature values ​​corresponding to each temperature value point are obtained respectively; each cooling segment corresponding to each cooling calculation is obtained respectively, and according to each temperature value, starting temperature and ending temperature, the cooling segment starting temperature and cooling segment ending temperature corresponding to each cooling segment are determined respectively; the total cooling time is obtained, and according to the cooling segment starting temperature, cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate, at least two pairs of cooling description information consisting of cooling time and cooling rate corresponding to each cooling calculation are calculated by a pre-constructed nonlinear control calculation method; Among them, the temperature values ​​corresponding to each temperature value point are obtained respectively, including: if the current cooling calculation is not the first cooling calculation, obtaining the cooling rate corresponding to each cooling segment in the previous cooling calculation corresponding to the current cooling calculation; determining the temperature point when the instantaneous cooling rate is equal to the cooling rate of each cooling segment in each previous cooling segment corresponding to the current cooling calculation; the calculated temperature point in each previous cooling segment is the temperature segmentation point corresponding to the current cooling calculation.

2. The method according to claim 1, characterized in that The total cooling range and the average cooling rate are calculated according to the temperature description information, including: The total temperature reduction range is calculated by subtracting the end temperature from the start temperature; The average cooling rate is calculated based on the total cooling range and the total cooling time.

3. The method according to claim 2, characterized in that The step of determining the number of temperature reduction calculations according to the temperature reduction accuracy includes: Obtaining the temperature reduction accuracy; The temperature reduction accuracy is matched with a pre-constructed temperature reduction times mapping table to determine the temperature reduction calculation times.

4. The method according to claim 1, characterized in that: According to the cooling segment starting temperature, the cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate, at least two pairs of cooling description information consisting of the cooling time and the cooling rate corresponding to each cooling calculation are calculated by a pre-constructed nonlinear control calculation method, including: According to the starting temperature of the cooling segment, the ending temperature of the cooling segment, the total cooling time, the total cooling range and the average cooling rate, at least one cooling description parameter corresponding to each cooling calculation is calculated by a pre-constructed nonlinear control calculation method; According to the cooling description parameters and the total cooling time, the cooling time corresponding to each cooling section in each cooling calculation is calculated; According to the cooling description parameters, the total cooling time, the starting temperature of the cooling segment and the ending temperature of the cooling segment, the cooling rate corresponding to each cooling segment in each cooling calculation is calculated; The cooling description information consists of at least two pairs of cooling time and cooling rate corresponding to each cooling calculation.

5. The method according to claim 1, characterized in that The electronic expansion valve opening and the evaporator fan speed are calculated based on each of the cooling description information, including: In each cooling calculation, the cooling time, cooling rate and temperature value corresponding to each cooling section are obtained; The electronic expansion valve opening corresponding to each cooling section is calculated according to the cooling time, the cooling rate, the temperature value, the starting temperature, the ending temperature and the total cooling time; The evaporator fan speed corresponding to each cooling section is calculated according to the opening of the electronic expansion valve, the cooling time, the cooling rate and the temperature value.

6. A nonlinear temperature reduction control device based on an environmental test chamber, characterized in that: include: The temperature description information acquisition module is used to obtain the temperature description information corresponding to the environmental test chamber; wherein the temperature description information includes at least one of the following: starting temperature, ending temperature, total cooling time and cooling accuracy; A total cooling range and average cooling rate calculation module, used to calculate the total cooling range and average cooling rate according to the temperature description information; A cooling description information calculation module is used to determine the number of cooling calculations according to the cooling accuracy, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate according to the number of cooling calculations, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; An electronic expansion valve opening and evaporator fan speed calculation module, used to calculate the electronic expansion valve opening and the evaporator fan speed according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed; Wherein, the cooling description information calculation module is specifically used to: calculate the number of temperature value points corresponding to each cooling calculation according to the number of cooling calculations, and obtain the temperature values ​​corresponding to each temperature value point; obtain each cooling segment corresponding to each cooling calculation, and determine the cooling segment starting temperature and cooling segment ending temperature corresponding to each cooling segment according to each temperature value, starting temperature and ending temperature; obtain the total cooling time, and calculate at least two pairs of cooling description information consisting of cooling time and cooling rate corresponding to each cooling calculation according to the cooling segment starting temperature, cooling segment ending temperature, the total cooling time, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; The cooling description information calculation module is also specifically used for: if the current cooling calculation is not the first cooling calculation, obtaining the cooling rate corresponding to each cooling segment in the previous cooling calculation corresponding to the current cooling calculation; determining the temperature point in each previous cooling segment corresponding to the current cooling calculation when the instantaneous cooling rate is equal to the cooling rate of each cooling segment; the calculated temperature point in each previous cooling segment is the temperature segmentation point corresponding to the current cooling calculation.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the nonlinear temperature reduction control method based on the environmental test chamber as described in any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the nonlinear temperature reduction control method based on an environmental test chamber according to any one of claims 1 to 5 when executed.

9. A nonlinear temperature reduction control system based on an environmental test chamber, characterized in that: The system comprises: a temperature sensor in an environmental test chamber, an electronic expansion valve, an evaporator fan, an evaporator, an evaporator fan speed control module, a valve opening control module and a collection nonlinear calculation control module; Wherein, the acquisition nonlinear calculation control module is used to execute the nonlinear temperature reduction control method based on the environmental test chamber as described in any one of claims 1 to 5; The temperature sensor in the environmental test box is used to collect temperature description information corresponding to the environmental test box and send the temperature description information to the acquisition nonlinear calculation control module; The valve opening control module is used to receive the electronic expansion valve opening sent by the acquisition nonlinear calculation control module, and control the valve opening of the electronic expansion valve according to the electronic expansion valve opening; The evaporator fan speed control module is used to receive the evaporator fan speed sent by the acquisition nonlinear calculation control module, and control the speed of the evaporator fan corresponding to the evaporator according to the evaporator fan speed; The electronic expansion valve is used to receive instructions from the valve opening control module to adjust the valve opening of the electronic expansion valve; The evaporator is used to receive instructions from the evaporator fan speed control module to adjust the speed of the evaporator fan corresponding to the evaporator.

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