Method, device, equipment and medium for determining the air change rate of hot air aging test chamber

Abstract

The present invention discloses a method, device, equipment and medium for determining the ventilation rate of a hot air aging test chamber. The present invention obtains a first density of gas at a working chamber temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber volume and a first volume, wherein the ambient temperature is the temperature outside the working chamber, and the first volume is the volume of gas passing through the heating device from outside the working chamber in unit time; an expansion coefficient is determined based on the first volume, the first density and the second density, and an expansion coefficient that can characterize the degree of change of the first volume under the heating device is determined by the first density of gas at the working chamber temperature and the second density of gas at the ambient temperature, and the expansion coefficient is used for calculating the ventilation rate, fully considering the influence of temperature difference on the volume of gas, which is beneficial to improving the accuracy of the ventilation rate. The present invention can be widely applied to the field of test chamber technology.

Description

Technical Field

[0001] The present invention relates to the field of test chambers, in particular to a method, device, equipment and medium for determining the air exchange rate of a hot air aging test chamber. Background Art

[0002] The hot air aging test chamber is a kind of experimental equipment suitable for heat resistance test of non-metallic materials, ventilation aging test of electronic parts and components, and plasticized products, and is widely used. Usually, the heating device of the hot air aging test chamber is placed in the gas exchange duct of the studio. The external air flows in for heating and then enters the studio to realize temperature control, while part of the air inside the studio flows out of the studio through the ventilation port for ventilation. The air exchange rate is an important core parameter during the use of the heating device of the hot air aging test chamber. When calculating the air exchange rate, the existing hot air aging test chamber equates the volume of gas entering the studio from the outside with the volume of gas actually entering the studio. In fact, due to the temperature difference between the inside and outside of the studio, the volume of gas actually entering the studio will change to a certain extent, thereby causing the air exchange rate to change. Therefore, the existing air exchange rate calculation method has poor accuracy. Summary of the Invention

[0003] In view of this, in order to solve the above technical problems, the purpose of the present invention is to provide a method, device, equipment and medium for determining the air change rate of a hot air aging test chamber that improves the accuracy of the air change rate.

[0004] The technical solution adopted in the embodiment of the present invention is:

[0005] Method for determining the air exchange rate of a hot air aging test chamber. The hot air aging test chamber includes a workroom, an air exchange port, and a heating device, including:

[0006] Obtaining a first density of gas at a working temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber volume, and a first volume; the ambient temperature is the temperature outside the working chamber, and the first volume is the volume of gas passing through the heating device from outside the working chamber per unit time;

[0007] determining an expansion coefficient based on the first volume, the first density, and the second density; wherein the expansion coefficient represents a degree of change of the first volume under the heating device;

[0008] The ventilation rate is determined according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient.

[0009] Furthermore, obtaining the first density of the gas at the working temperature and the second density of the gas at the ambient temperature includes:

[0010] Acquire the working room temperature, and query the density value corresponding to the working room temperature from a preset density library as the first density; the preset density library includes a plurality of temperature values ​​and a density value corresponding to each temperature value;

[0011] The ambient temperature is acquired, and a density value corresponding to the ambient temperature is searched from the preset density library as the second density.

[0012] Furthermore, the ventilation port further includes a power fan installed in the working room, and the obtaining of ventilation port parameters of the ventilation port includes:

[0013] Obtaining the ventilation outlet wind speed of the power fan;

[0014] Obtaining the damper opening of the ventilation port, and calculating the ventilation port cross-sectional area according to the damper opening;

[0015] The ventilation port parameters include the ventilation port wind speed and the ventilation port cross-sectional area.

[0016] Furthermore, determining the expansion coefficient according to the first volume, the first density, and the second density includes:

[0017] calculating a first ratio of the first density to the second density;

[0018] obtaining a second volume according to a first product of the first ratio and the first volume;

[0019] The expansion coefficient is obtained according to a difference between the second volume and the first volume.

[0020] Furthermore, determining the ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient includes:

[0021] determining a first parameter according to a second product of the ventilation port parameter and the unit time;

[0022] determining a second parameter according to the sum of the working chamber volume and the expansion coefficient;

[0023] The ventilation rate is determined according to the first parameter and the second parameter.

[0024] Furthermore, the ventilation port parameters include ventilation port wind speed and ventilation port cross-sectional area. The ventilation rate is determined based on the first parameter and the second parameter, and the formula is:

[0025]

[0026] Where N is the air change rate, S T is the ventilation outlet wind speed, M is the ventilation outlet cross-sectional area, ΔT is the unit time, VG is the studio volume, V P is the expansion coefficient.

[0027] An embodiment of the present invention further provides a device for determining the air exchange rate of a hot air aging test chamber, comprising:

[0028] An acquisition module, configured to acquire a first density of gas at a working chamber temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber volume, and a first volume; the ambient temperature being the temperature outside the working chamber, and the first volume being the volume of gas passing through the heating device from outside the working chamber per unit time;

[0029] a first determining module, configured to determine an expansion coefficient based on the first volume, the first density, and the second density; the expansion coefficient representing a degree of change of the first volume under the heating device;

[0030] The second determining module is configured to determine the ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient.

[0031] An embodiment of the present invention also provides an electronic device, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the method.

[0032] An embodiment of the present invention also provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the method.

[0033] The beneficial effects of the present invention are: by obtaining the first density of the gas at the studio temperature, the second density of the gas at the ambient temperature, the ventilation port parameters of the ventilation port, the studio volume and the first volume, wherein the ambient temperature is the temperature outside the studio, and the first volume is the volume of gas passing through the heating device from the outside of the studio in unit time; according to the first volume, the first density and the second density, the expansion coefficient is determined, and the expansion coefficient that can characterize the degree of change of the first volume under the heating device is determined by the first density of the gas at the studio temperature and the second density of the gas at the ambient temperature, and the expansion coefficient is used for the calculation of the ventilation rate, fully considering the influence of temperature difference on the volume of the gas, which is conducive to improving the accuracy of the ventilation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1Schematic diagram of the steps of the method for determining the air exchange rate of the hot air aging test chamber of the present invention;

[0035] Figure 2 Schematic diagram of a hot air aging test chamber according to a specific embodiment of the present invention;

[0036] Figure 3 for Figure 2 Top view of . DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0038] The terms "first," "second," "third," and "fourth," etc., in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, rather than to describe a specific order. In addition, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] like Figure 1 As shown, an embodiment of the present invention provides a method for determining the air exchange rate of a hot air aging test chamber, comprising steps S100-S300:

[0041] S100 , obtaining a first density of gas at a working chamber temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber capacity, and a first volume.

[0042] like Figure 2 and Figure 3As shown, optionally, the hot air aging test chamber includes a studio 1, an air exchange port 2, a heating device 3, and a power fan (not shown) installed in the studio. Specifically, the heating device is placed in the gas exchange duct 4 of the studio 1. When the external gas of the studio (the embodiment of the present invention takes air as an example) flows in and is heated by the heating device, it enters the studio 1 through the air inlet 5 of the studio, and the air outlet 6 in the studio 1 will re-enter the air in the studio 1 into the duct for heating and re-enter the studio 1, completing the internal air circulation of the studio 1 to meet the set wind speed requirement and reach the set temperature value, thereby realizing temperature control in the studio 1; in addition, a part of the air will flow out from the air exchange port 2. Optionally, the power fan of the studio 1 is used to control the wind speed to achieve the adjustment of the overall wind speed of the studio 1, that is, the adjustment of the air speed of the air exchange port. The ventilation rate is adjusted by the size of the damper 6 at the ventilation port 2 on the back of the hot air aging test chamber. The opening and closing angle of the damper 6 (i.e., the damper opening) can adjust the cross-sectional area of ​​the ventilation port to control the ventilation rate. The hot air aging test chamber operates by adjusting core parameters such as temperature, wind speed, and ventilation rate. It should be noted that the ambient temperature is the temperature outside the studio 1; the first volume can be calculated by the wind speed of the gas exchange duct and the unit time; the studio temperature can be the temperature measured in the studio 1 or a set value, which can be used to control the temperature in the studio 1 within a certain fluctuation range based on the set value through PID.

[0043] Optionally, obtaining the first density of the gas at the working temperature and the second density of the gas at the ambient temperature in step S100 includes steps S111-S112. The execution order of S111 and S112 is not limited. Specifically:

[0044] S111 . Acquire a working room temperature, and query a density value corresponding to the working room temperature from a preset density library as a first density.

[0045] S112: Acquire the ambient temperature, and query the density value corresponding to the ambient temperature from the preset density library as the second density.

[0046] In an embodiment of the present invention, the preset density library includes a number of temperature values ​​and the density value corresponding to each temperature value. The preset density library can be stored in the form of temperature and density data, including but not limited to storage in a table, as shown in Table 1, which shows the correspondence between temperature and density values. It should be noted that when the workroom temperature or ambient temperature is not found in Table 1, the closest temperature value in Table 1 is used as the workroom temperature or ambient temperature. For example, if the ambient temperature is 10°C, the second density is 1.248 g / L. When the workroom temperature is 30°C, the first density is 1.165 g / L.

[0047] Table 1

[0048]

[0049] Optionally, the ventilation port parameters include ventilation port wind speed and ventilation port cross-sectional area. Acquiring the ventilation port parameters of the ventilation port in step S100 includes steps S121-S122. The execution order of S121 and S122 is not limited. Specifically:

[0050] S121. Obtain the ventilation outlet wind speed of the power fan.

[0051] S122: Obtain the damper opening of the ventilation port, and calculate the cross-sectional area of ​​the ventilation port according to the damper opening.

[0052] In an embodiment of the present invention, the ventilation port wind speed can be determined by reading the parameters of the controller of the power fan or the parameters of the PLC controller of the hot air aging test chamber, and the damper opening of the ventilation port can be calculated and determined by reading the parameters of the PLC controller of the hot air aging test chamber, thereby determining the ventilation port cross-sectional area according to the preset damper specification parameters.

[0053] S200: Determine an expansion coefficient according to the first volume, the first density, and the second density.

[0054] In this embodiment of the present invention, the first volume is the volume of gas passing through the heating device from outside the working chamber per unit time. Since the external air is heated by the heating device, the density and volume of the air change. In this embodiment of the present invention, the expansion coefficient is used to characterize the degree of change in the first volume under the heating device. It should be noted that the unit time can be adjusted as needed, for example, to minutes, seconds, or even milliseconds, without specific limitation.

[0055] Optionally, step S200 includes steps S210-S230:

[0056] S210: Calculate a first ratio of the first density to the second density.

[0057] S220: Obtain a second volume according to a first product of the first ratio and the first volume.

[0058] S230: Obtain the expansion coefficient according to the difference between the second volume and the first volume.

[0059] In the embodiment of the present invention, the ideal gas state equation: Clapeyron equation is introduced:

[0060] pV=nRT

[0061] Wherein, p is the atmospheric pressure, V is the volume of the gas, n is the amount of substance in mol, R is the universal gas constant R=8.314J / mol / K, and T is the absolute temperature of the gas. The hot air aging test chamber of the embodiment of the present invention assumes that the atmospheric pressure is in a stable state at normal pressure. Using Gay-Lussac's law, it can be known that under the condition of constant pressure, when a gas is at the same atmospheric pressure (i.e., p1=p2) and at different temperatures (assuming T1 and T2), the volume of a certain mass of gas is proportional to the thermodynamic temperature: V1 / T1=V2 / T2, that is, from p1V1=nRT1, p2V2=nRT2 and p1=p2, it can be obtained that V1 / T1=V2 / T2. Then, according to the inversely proportional relationship between the volume of air and the density of air at two different temperatures, knowing the density of air at any temperature can infer the volume change of air at other temperatures with temperature change, that is

[0062] From the above derivation process, we can get the formula:

[0063]

[0064]

[0065] Where V2 is the first volume, ρ1 is the first density of the gas at the studio temperature, ρ2 is the second density of the gas at the ambient temperature, T1 is the studio temperature, T2 is the ambient temperature, V1 is the second volume, V P is the expansion coefficient.

[0066] S300 : Determine a ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient.

[0067] Optionally, step S300 includes steps S310-330. The execution order of S310 and S320 is not limited. Specifically:

[0068] S310: Determine a first parameter according to a second product of the ventilation port parameter and the unit time.

[0069] In the embodiment of the present invention, the unit time can be adjusted as needed and is not specifically limited. Specifically, the first parameter is S T ·M·ΔT, where S T is the ventilation port wind speed, M is the ventilation port cross-sectional area, and ΔT is the unit time.

[0070] S320: Determine a second parameter according to the sum of the working chamber volume and the expansion coefficient.

[0071] Specifically, the second parameter is V G +V P , where V Gis the studio volume, V P is the expansion coefficient.

[0072] S330. Determine the ventilation rate according to the first parameter and the second parameter.

[0073] Optionally, the ventilation rate is determined according to a second ratio of the first parameter to the second parameter. Specifically, the formula is:

[0074]

[0075] Where N is the air change rate, S T is the ventilation outlet wind speed, M is the ventilation outlet cross-sectional area, ΔT is the unit time, V G is the studio volume, V P is the expansion coefficient.

[0076] Optionally, when the ventilation rate needs to be controlled within a predetermined range, the air door opening of the ventilation port can be adjusted to thereby adjust the cross-sectional area of ​​the ventilation port to meet the set ventilation rate requirement.

[0077] It should be noted that calculating the air exchange rate using the above air exchange rate formula allows the changes in air volume and density at different temperatures to be considered within the original flow rate measurement method. Specifically, the volume of the gas expands proportionally with increasing temperature after heating, and its density changes inversely with increasing temperature. By introducing the expansion coefficient, a final result approximating the energy consumption principle can be obtained, improving the accuracy of the final calculated air exchange rate. Furthermore, the unit time can be set arbitrarily, greatly reducing the algorithm time in the measurement cycle. The original energy consumption principle requires at least 2 hours of testing time, while this method can achieve a test time of seconds. This improves the efficiency of the algorithm for calculating the air exchange rate while ensuring data authenticity, providing a basis and method for real-time monitoring of the gas exchange rate in hot air aging test chambers.

[0078] An embodiment of the present invention further provides a device for determining the air exchange rate of a hot air aging test chamber, comprising:

[0079] An acquisition module, configured to acquire a first density of gas at a working chamber temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber volume, and a first volume; the ambient temperature being the temperature outside the working chamber, and the first volume being the volume of gas passing through the heating device from outside the working chamber per unit time;

[0080] a first determining module, configured to determine an expansion coefficient based on the first volume, the first density, and the second density; the expansion coefficient representing a degree of change of the first volume under the heating device;

[0081] The second determining module is configured to determine the ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient.

[0082] Optionally, the acquisition module, the first determination module, and the second determination module may be subunits in a PLC controller of a hot air aging test chamber.

[0083] The contents of the above method embodiments are all applicable to the present device embodiments. The functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0084] An embodiment of the present invention further provides an electronic device, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set, or instruction set, and the at least one instruction, at least one program, code set, or instruction set is loaded and executed by the processor to implement the method for determining the air change rate of a hot air aging test chamber according to the aforementioned embodiment. Electronic devices according to the embodiments of the present invention include, but are not limited to, mobile phones, tablet computers, computers, PLC controllers, industrial computers, and the like.

[0085] The contents of the above method embodiments are all applicable to the present device embodiments. The functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0086] An embodiment of the present invention also provides a computer-readable storage medium, which stores at least one instruction, at least one program, code set or instruction set. The at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the method for determining the air exchange rate of the hot air aging test chamber of the aforementioned embodiment.

[0087] An embodiment of the present invention further provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the method for determining the air change rate of a hot air aging test chamber according to the aforementioned embodiment.

[0088] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application 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 clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0089] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0090] In the several embodiments provided herein, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, the coupling or direct coupling or communication connection shown or discussed between each other may be through interfaces, or indirect coupling or communication connection between devices or units, which may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the objectives of the present embodiments according to actual needs. Furthermore, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in either hardware or software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes multiple instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store programs.

[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. Method for determining the ventilation rate of a hot air aging test chamber, the hot air aging test chamber includes a working room, a ventilation port and a heating device, characterized in that: include: Obtaining a first density of gas at a working temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber volume, and a first volume; the ambient temperature is the temperature outside the working chamber, and the first volume is the volume of gas passing through the heating device from outside the working chamber per unit time; determining an expansion coefficient based on the first volume, the first density, and the second density; wherein the expansion coefficient represents a degree of change of the first volume under the heating device; determining a ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient; The determining of the expansion coefficient according to the first volume, the first density, and the second density includes: calculating a first ratio of the first density to the second density; obtaining a second volume according to a first product of the first ratio and the first volume; obtaining the expansion coefficient according to a difference between the second volume and the first volume; The determining of the ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient includes: determining a first parameter according to a second product of the ventilation port parameter and the unit time; determining a second parameter according to the sum of the working chamber volume and the expansion coefficient; determining the ventilation rate according to the first parameter and the second parameter; The ventilation port parameters include ventilation port wind speed and ventilation port cross-sectional area. The ventilation rate is determined based on the first parameter and the second parameter, and the formula is: Where N is the air change rate, S T is the ventilation outlet wind speed, M is the ventilation outlet cross-sectional area, ΔT is the unit time, V G is the studio volume, V P is the expansion coefficient.

2. The method for determining the air exchange rate of a hot air aging test chamber according to claim 1, characterized in that: The obtaining of the first density of the gas at the working temperature and the second density of the gas at the ambient temperature comprises: Acquire the working room temperature, and query the density value corresponding to the working room temperature from a preset density library as the first density; the preset density library includes a plurality of temperature values ​​and a density value corresponding to each temperature value; The ambient temperature is acquired, and a density value corresponding to the ambient temperature is searched from the preset density library as the second density.

3. The method for determining the air exchange rate of a hot air aging test chamber according to claim 1, characterized in that: The ventilation port further includes a power fan installed in the working room, and the obtaining of ventilation port parameters of the ventilation port includes: Obtaining the ventilation outlet wind speed of the power fan; Obtaining the damper opening of the ventilation port, and calculating the ventilation port cross-sectional area according to the damper opening; The ventilation port parameters include the ventilation port wind speed and the ventilation port cross-sectional area.

4. A device for implementing the method for determining the air exchange rate of a hot air aging test chamber according to any one of claims 1 to 3, characterized in that: include: An acquisition module, configured to acquire a first density of gas at a working chamber temperature, a second density of gas at an ambient temperature, ventilation port parameters of the ventilation port, a working chamber volume, and a first volume; the ambient temperature being the temperature outside the working chamber, and the first volume being the volume of gas passing through the heating device from outside the working chamber per unit time; a first determining module, configured to determine an expansion coefficient based on the first volume, the first density, and the second density; the expansion coefficient representing a degree of change of the first volume under the heating device; The second determining module is configured to determine the ventilation rate according to the ventilation port parameters, the working chamber volume, the unit time, and the expansion coefficient.

5. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that The storage medium stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the method according to any one of claims 1 to 3.

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