An electronic cigarette expansion test bench and its construction method and testing method

Abstract

The invention discloses an electronic cigarette expansion test bench and a construction method and a testing method thereof. Based on the similarity principle and similar boundary condition analysis, a geometric scale, an electric power scale, a suction flow scale, a suction time scale and a suction interval time scale between the electronic cigarette expansion test bench and an actual prototype of the electronic cigarette are obtained, an electronic cigarette expansion test bench proportional to the actual prototype of the electronic cigarette is built, and the suction flow, heating power, suction time and suction interval time of the electronic cigarette expansion test bench are controlled to simulate the actual suction process of the electronic cigarette, and then the aerosol temperature generated in the experiment and the mass of the total particulate matter of the aerosol captured by the capture component are measured to obtain the measurement parameters required for the experiment, thereby solving the problem in the prior art that it is inconvenient to measure the experimental parameters due to the size limitation of the electronic cigarette.

Description

Technical Field

[0001] The present invention relates to the field of electronic cigarette testing, and in particular to an electronic cigarette expansion test bench and a construction method and a testing method thereof. Background Art

[0002] As people pay more and more attention to health, they realize that traditional cigarettes are harmful to health. Electronic cigarettes are a new type of tobacco product that has developed most rapidly in recent years and are favored by consumers. In recent years, there have been an endless number of electronic cigarette products, and the quality of the products has also been mixed. Therefore, it is necessary to evaluate the performance of electronic cigarettes by measuring the relevant parameters of electronic cigarettes to optimize the quality of electronic cigarettes. However, due to the very limited geometric size of electronic cigarettes, the measurement process of some experimental parameters is relatively complicated, which is not conducive to the research and development design and product optimization of electronic cigarettes by relevant technicians. Summary of the invention

[0003] The present invention provides an electronic cigarette expansion test bench and a construction method and a testing method thereof, which are used to solve the problem of inconvenience in measuring electronic cigarette product parameters due to the limited geometric size of the electronic cigarette.

[0004] The first invention object of the present invention is to provide a method for building an electronic cigarette expansion test bench, comprising the following steps:

[0005] Set the scale of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette;

[0006] According to the similarity of Reynolds number and puff capacity, the scale of the puff flow rate between the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette is determined;

[0007] According to the similarity boundary conditions, the puff time scale, puff interval time scale and heating power scale of the electronic cigarette expansion test bench and the actual electronic cigarette prototype are determined;

[0008] Build an electronic cigarette expansion test bench.

[0009] Furthermore, the method for constructing the electronic cigarette expansion test bench includes the following steps:

[0010] The enlargement ratio of the atomizer core length, airflow channel length, atomizer core radius, and airflow channel diameter of the electronic cigarette expansion test bench and the actual electronic cigarette prototype is set to λ l , the heating area is enlarged by l 2 ;

[0011] According to the similar Reynolds number and the similar suction capacity, the ratio of the suction flow rate between the electronic cigarette expansion test bench and the actual electronic cigarette prototype is determined to be λ l 2 ;

[0012] According to the similarity boundary conditions, the puff time scale and the puff interval time scale of the electronic cigarette expansion test bench and the actual electronic cigarette prototype are determined as λ l 2 ; Heating power scale is λ l .

[0013] Optionally, the material is easy to obtain, and in order to ensure that the material of the electric heating wire of the enlarged model is consistent with the material properties of the electronic cigarette prototype, the physical phenomena are similar. In another preferred embodiment of the present invention, the radius of the electric heating wire of the electronic cigarette expansion test bench is set to be the same as the radius of the electric heating wire of the actual electronic cigarette prototype, and the enlargement ratio of the number of turns of the electric heating wire wrapped around the atomizer core in the electronic cigarette expansion test bench and the actual electronic cigarette prototype is determined to be λ according to the enlargement ratio required for the heating area. l .

[0014] Another object of the present invention is to provide an electronic cigarette expansion test bench constructed according to the above method, comprising: a suction component, an atomization component, a capture component, a control component and an airflow channel;

[0015] The atomization component and airflow channel are models that are enlarged according to a set enlargement scale based on similar principles of the actual prototype of the electronic cigarette;

[0016] The atomizing assembly is used to generate an aerosol;

[0017] The suction component sucks the aerosol generated by the atomization component to the capture component through the air flow channel;

[0018] The control component is used to control the atomization component and the suction component;

[0019] The capture component is used to capture the total particulate matter in the aerosol.

[0020] Optionally, the atomization assembly includes an atomization core and an electric heating wire wound around the atomization core.

[0021] Optionally, the radius of the electric heating wire remains unchanged relative to the actual prototype of the electronic cigarette, and the number of turns of the electric heating wire is enlarged according to the enlargement ratio.

[0022] Optionally, the experimental platform further comprises a quartz tube, and an air flow channel is formed in the quartz tube.

[0023] Optionally, the control component includes: a suction control component and an electric power control component,

[0024] The suction control component is used to control the suction flow, suction time and suction interval time of the suction component;

[0025] The electric power control component is used to adjust the electric power and then provide electric energy to the atomization component.

[0026] Optionally, the suction control assembly includes: a stopwatch and a gas flow meter;

[0027] The gas flow meter is used to control the suction flow of the suction component;

[0028] The stopwatch is used to control the suction time and suction interval time of the suction component.

[0029] Optionally, a measuring component is also included, and the measuring component is used to measure the temperature of the atomization component, the experimental environment and the aerosol;

[0030] and / or measure the mass of the total particulate matter captured in the aerosol.

[0031] Optionally, the measuring components include: a thermocouple probe, a temperature recorder and an electronic balance;

[0032] The thermocouple probe was connected to a temperature recorder to measure the temperature of the atomization assembly, aerosol, and experimental environment;

[0033] An electronic balance is used to measure the weight of the capture assembly.

[0034] Optionally, the capture component is a Cambridge filter.

[0035] Optionally, the suction component is a vacuum pump.

[0036] Another object of the present invention is to provide a testing method using the above-mentioned electronic cigarette extension test bench, the testing method comprising the following steps:

[0037] S1, adding liquid e-liquid to the atomizer assembly until it is saturated;

[0038] S2. Measure the weight of the capture assembly and record it;

[0039] S3, placing the capture component in the air flow channel;

[0040] S4, turning on the suction component and controlling the suction flow of the suction component to a suction flow target value;

[0041] S5, controlling the heating power of the atomization component to a target value, and starting timing;

[0042] S6. Measure and record the aerosol temperature in the airflow channel at regular intervals;

[0043] S7, after the heating time reaches the target value of the puffing time, the atomizing component and the puffing component are turned off and the timing is started again, until the target value of the puffing interval time is reached, and the atomizing component and the puffing component are turned on again;

[0044] S8, repeat steps S4-S7;

[0045] S9. Close the atomizing assembly and the suction assembly, and measure and record the weight of the capturing assembly.

[0046] The beneficial effects of the present invention are as follows:

[0047] The electronic cigarette expansion test bench and its construction method and testing method provided in the embodiment of the present invention obtain the geometric scale, electric power scale, suction flow scale, suction time scale and suction interval time scale of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette based on the similarity principle and similar boundary condition analysis, build an electronic cigarette expansion test bench proportional to the actual prototype of the electronic cigarette, and control the suction flow, heating power, suction time and suction interval time of the electronic cigarette expansion test bench to simulate the actual suction process of the electronic cigarette, and then measure the aerosol temperature generated in the experiment and the mass of the total particulate matter of the aerosol captured by the capture component to obtain the measurement parameters required for the experiment, thereby solving the problem in the prior art that it is inconvenient to measure the experimental parameters due to the size limitation of the electronic cigarette. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A flow chart of a method for building an electronic cigarette extension test bench provided by an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of the structure of an electronic cigarette extension test bench provided by an embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the structure of another electronic cigarette extension test bench provided by an embodiment of the present invention;

[0051] Figure 4 A schematic diagram of the specific structure of an electronic cigarette extension test bench provided by an embodiment of the present invention;

[0052] Figure 5 A flow chart of a testing method using an electronic cigarette expansion test bench provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present invention clearer, the specific implementation methods of the electronic cigarette expansion test bench and its construction method and testing method provided by the embodiment of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention and are not intended to limit the present invention. And in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0054] The size and shape of each object in the accompanying drawings do not reflect the actual proportion of the electronic cigarette expansion test bench, and the purpose is only to illustrate the content of the present invention.

[0055] Electronic cigarettes are devices that convert electronic cigarette oil into inhalable aerosols through electrically driven atomization components. Although electronic cigarettes do not burn tobacco during the inhalation process and the release of harmful ingredients is lower than that of traditional cigarettes, electronic cigarettes still produce aerosol particles such as nicotine, which still have an impact on the human body. Therefore, studying aerosol particles such as nicotine released by electronic cigarettes is very important for improving the quality of electronic cigarettes. However, due to the relatively small size of electronic cigarettes, it is very inconvenient for experimenters to directly measure experimental parameters.

[0056] Based on this, an embodiment of the present invention provides a method for building an electronic cigarette expansion test bench, and the building method is based on a design concept of the similarity principle.

[0057] like Figure 1 As shown, the steps for building the electronic cigarette expansion test bench include:

[0058] Set the scale of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette;

[0059] According to the similarity of Reynolds number and puff capacity, the scale of the puff flow rate between the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette is determined;

[0060] According to the similarity boundary conditions, the puff time scale, puff interval time scale and heating power scale of the electronic cigarette expansion test bench and the actual electronic cigarette prototype are determined;

[0061] Build an electronic cigarette expansion test bench.

[0062] Furthermore, specifically, the steps of the construction method include:

[0063] Use λ q The scale showing the parameters of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette, namely q' represents the relevant parameters of the electronic cigarette expansion test bench, and q represents the relevant parameters of the actual prototype of the electronic cigarette;

[0064] Therefore, l can represent the length of the atomizer core or the length of the airflow channel of the actual prototype of the electronic cigarette; l' can represent the length of the atomizer core or the length of the airflow channel of the electronic cigarette expansion test bench;

[0065] R represents the radius of the atomizer core of the actual prototype of the electronic cigarette; R' represents the radius of the atomizer core of the electronic cigarette expansion test bench;

[0066] D represents the diameter of the airflow channel of the actual prototype of the electronic cigarette; D' represents the diameter of the airflow channel of the electronic cigarette expansion test bench;

[0067] A represents the heating area of ​​the actual prototype of the electronic cigarette; A' represents the heating area of ​​the electronic cigarette expansion test bench;

[0068] r1 represents the radius of the electric heating wire of the actual prototype of the electronic cigarette; r1' represents the radius of the electric heating wire of the electronic cigarette expansion test bench;

[0069] n represents the number of turns of the electric heating wire of the actual prototype of the electronic cigarette; n' represents the number of turns of the electric heating wire of the electronic cigarette expansion test bench;

[0070] υ represents the puffing rate of the actual prototype of the electronic cigarette; υ' represents the puffing rate of the electronic cigarette expansion test bench;

[0071] η represents the suction flow rate of the actual prototype of the electronic cigarette; η' represents the suction flow rate of the electronic cigarette expansion test bench;

[0072] T1 and T2 represent the puffing time and puffing interval of the actual prototype of the electronic cigarette, respectively; T1' and T2' represent the puffing time and puffing interval of the electronic cigarette expansion test bench, respectively;

[0073] P represents the heating power of the actual prototype of the electronic cigarette; P' represents the heating power of the electronic cigarette expansion test bench.

[0074] On this basis, the length ratio of the atomizer core and the airflow channel between the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette is first determined as follows: Atomizer core radius scale Air flow channel diameter ratio And heating area ratio

[0075] The radius of the electric heating wire of the electronic cigarette expansion test bench is set to be the same as the radius of the electric heating wire of the actual prototype of the electronic cigarette, that is, According to the geometric similarity of the heating area Right now

[0076]

[0077] Therefore, the ratio of the number of turns of the electric heating wire in the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette can be determined.

[0078] Determine the ratio of the puff rate of the electronic cigarette expansion test bench and the actual electronic cigarette prototype

[0079] According to the viscosity similarity criterion (Reynolds similarity criterion R e '=R e ,in, δ represents kinematic viscosity), we can get Since the fluid medium flowing in the airflow channel of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette is air, their medium kinematic viscosity δ, thermal conductivity λ, constant pressure specific heat capacity c pand dynamic viscosity μ are the same, so

[0080]

[0081] Determine the ratio of the suction flow rate of the electronic cigarette expansion test bench and the actual electronic cigarette prototype

[0082] According to the definition of suction flow: so

[0083]

[0084] Determine the puff time ratio between the electronic cigarette expansion test bench and the actual electronic cigarette prototype Puff interval time scale Heating power ratio

[0085] The atomizer core can be simplified as a cylinder, with L representing the length of the atomizer core heating area and R representing the atomizer core radius. Assuming that the local thermal equilibrium of the atomizer core is established (i.e. the local temperature of the solid fiber of the oil-conducting cotton and the local temperature of the liquid e-liquid are equal), the energy conservation equation of the atomizer core is:

[0086]

[0087] Among them, ρ * Represents the density of the atomizer core (including the oil-conducting cotton and liquid e-liquid), c * Represents the specific heat capacity of the atomizer core, θ * It represents the thermal conductivity of the atomizer core, T represents temperature, τ represents time, ρ liq Represents the density of the smoke oil, c p,liq Represents the specific heat capacity of the e-liquid, υ x represents the velocity of the smoke oil along the axial direction x, υ r It represents the velocity component of the smoke oil along the radial direction r, r represents the ordinate, and x represents the abscissa.

[0088] When τ=0, the initial condition is T=T0, where T0 represents the ambient temperature.

[0089] Then, at the outer diameter edge of the heatable area of ​​the atomizer core, that is, at r = ±R, there is a boundary condition:

[0090]

[0091] Where h represents the convective heat transfer coefficient, h fg,liq represents the heat of vaporization of the e-liquid, P represents the heating power, and A represents the area of ​​the heating area.

[0092] The fluidity of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette is similar, so it can be seen that they both meet the above boundary condition formula (5), so the following formula is obtained:

[0093]

[0094] Formula (7) can be rearranged as

[0095]

[0096] Substituting equation (6) into equation (8), we can get

[0097]

[0098] The two sides of the equal sign in formula (9) are equal, so we can get

[0099]

[0100] so

[0101]

[0102] In addition, the time scale can be obtained by Fourier number similarity:

[0103] The Fourier number formula is Where θ represents thermal conductivity, τ represents time, ρ represents material density, c p represents the specific heat at constant pressure, and l represents the characteristic length.

[0104] In order to ensure that the physical phenomena of the electronic cigarette expansion test bench and the actual electronic cigarette prototype are consistent during the test process, the corresponding Fourier numbers during the test process should also be equal, that is,

[0105]

[0106] therefore In addition, the relationship between the suction flow scale and the suction time scale corresponding to the electronic cigarette expansion test bench and the actual electronic cigarette prototype is λ η =λ l , τ =λ l 2 , we can calculate the ratio of the gas capacity that the electronic cigarette expansion test bench can hold to the actual electronic cigarette prototype: This result is consistent with the volume ratio calculated previously.

[0107] Finally, an electronic cigarette expansion test bench was built based on the above results.

[0108] Furthermore, the embodiment of the present invention also provides an electronic cigarette extension test bench constructed according to the above method, such as Figures 2 to 5As shown, it includes: a suction component 500, an atomization component 200, a capture component 300, a control component and an air flow channel 600;

[0109] The atomizer assembly 200 and the airflow channel 600 are models of the actual prototype of the electronic cigarette that are enlarged according to a set enlargement scale based on similar principles.

[0110] The atomizing assembly 200 is used to generate aerosol;

[0111] The suction component 500 sucks the aerosol generated by the atomization component 200 to the capture component 300 through the air flow channel 600;

[0112] The control component is used to control the atomization component 200 and the suction component 500;

[0113] The capture assembly 300 is used to capture the total particulate matter of the aerosol.

[0114] Specifically, in the above-mentioned electronic cigarette expansion test bench provided by an embodiment of the present invention, the atomization assembly 200 includes an atomization core 3 and an electric heating wire 2 wound around the atomization core 3 .

[0115] Specifically, in the electronic cigarette expansion test bench provided by the embodiment of the present invention, the radius of the electric heating wire 2 remains unchanged relative to the actual prototype of the electronic cigarette, and the number of turns of the electric heating wire 2 is enlarged according to the expansion ratio.

[0116] Specifically, in the electronic cigarette expansion test bench provided in the embodiment of the present invention, the test bench further includes a quartz tube 4 , and an air flow channel 600 is formed in the quartz tube 4 .

[0117] Specifically, in the electronic cigarette extension test bench provided in the embodiment of the present invention, the control component includes: a suction control component 400 and an electric power control component 100;

[0118] The suction control component 400 is used to control the suction flow rate, suction time and suction interval time of the suction component 500;

[0119] The electric power control component 100 is used to adjust the electric power and then provide the electric energy to the atomization component 200 .

[0120] Optionally, the suction control assembly 400 includes a stopwatch 10 and a gas flow meter 6;

[0121] The gas flow meter 6 is used to control the suction flow of the suction component 500;

[0122] The stopwatch 10 is used to control the suction time and the suction interval time of the suction component 500 .

[0123] Specifically, in the electronic cigarette extension test bench provided in the embodiment of the present invention, a measuring component 700 is also included, and the measuring component is used to measure the temperature of the atomization component 200, the experimental environment and the aerosol;

[0124] and / or measure the mass of the total particulate matter captured in the aerosol.

[0125] Specifically, in the electronic cigarette extension test bench provided in the embodiment of the present invention, the measuring component 700 includes: a thermocouple probe 8, a temperature recorder 9, and an electronic balance 11;

[0126] The thermocouple probe 8 is connected to the temperature recorder 9 and inserted into the quartz tube through a number of small holes provided on the quartz tube 6 to measure the temperature of the atomization assembly 200, the aerosol and the experimental environment;

[0127] The electronic balance 11 is used to measure the weight of the capture assembly 300 .

[0128] Specifically, in the electronic cigarette expansion test bench provided in the embodiment of the present invention, the capture component 300 is a Cambridge filter.

[0129] Specifically, in the electronic cigarette expansion test bench provided in the embodiment of the present invention, the suction component 500 is a vacuum pump.

[0130] Specifically, in the electronic cigarette extension test bench provided in the embodiment of the present invention, the electric power control component 100 is a DC regulated power supply.

[0131] The above is only an example to illustrate the specific structure of the electronic cigarette expansion test bench provided in the embodiment of the present invention. In the specific implementation, the specific structure of the above components is not limited to the above structure provided in the embodiment of the present invention, and can also be other structures known to those skilled in the art, which is not limited here.

[0132] Combine the following Figure 4 Taking the expansion ratio of the electronic cigarette expansion test bench to the actual prototype of the electronic cigarette as 5:1 as an example, the construction of the electronic cigarette expansion test bench provided by the embodiment of the present invention and the testing method thereof are described in detail.

[0133] The electronic cigarette extension test bench is composed of an electric power control component 100, an electric heating wire 2, an atomizing core 3, a quartz tube 4, a vacuum pump 500, a gas flow meter 6, a Cambridge filter 7, a thermocouple probe 8, a temperature recorder 9, a stopwatch 10, and an electronic balance 11. The electric power control component 100 is connected to the electric heating wire 2 through a wire 13. The electric heating wire 2 is wound around the atomizing core 3 and placed together at one end of the quartz tube 4. The other end of the quartz tube 4 is embedded in the Cambridge filter 7 and is connected to the gas flow meter 6 through a pipeline 12. The gas flow meter 6 is connected to the vacuum pump 500. One end of the thermocouple probe 8 is connected to the temperature recorder 9, and the other end passes through a small hole on the wall of the quartz tube 4 to detect the temperature inside the quartz tube 4.

[0134] The electric power control component 100 provides electric energy to the electric heating wire 2, causing the electric heating wire 2 to heat up, thereby gasifying the tobacco oil in the atomizer core 3 into aerosol. The vacuum pump 500 draws air, allowing the aerosol to pass through the Cambridge filter 7 inside the quartz tube 4, so that part of the particulate matter in the aerosol is captured by the Cambridge filter 7.

[0135] The electronic cigarette expansion test bench is configured with an electric heating wire 2, an atomizing core 3 and a quartz tube 4 in an expansion ratio of 5:1 to the prototype.

[0136] Table 1 Geometrical parameters of the electronic cigarette expansion test bench and prototype

[0137]

[0138] Theoretically, according to the expansion ratio of 5:1 between the electronic cigarette expansion test bench and the electronic cigarette prototype, the wire diameter of the electric heating wire should be enlarged by 5 times, and the number of electric heating wire turns remains unchanged, then the heating area becomes A'=n'πD1'×d'=25A; and the data in the table is that the wire diameter of the electric heating wire remains unchanged, and the number of electric heating wire turns is enlarged by 5 times, then the heating area is A'=n'πD1'×d'=5n×π×5D1×d=25A. By comparison, it can be seen that the technical effect achieved by enlarging the wire diameter of the electric heating wire by 5 times and the number of electric heating wire turns remains unchanged is the same as that of the electric heating wire diameter remains unchanged and the number of electric heating wire turns is enlarged by 5 times, and both can be used as one of the embodiments of the present invention. For the convenience of experiment, the embodiment of the present invention adopts the method of keeping the wire diameter of the electric heating wire unchanged and enlarging the number of electric heating wire turns by 5 times.

[0139] Furthermore, the physical parameters of the electronic cigarette expansion bench experiment and prototype experiment are shown in Table 2.

[0140] Table 2 Physical parameters of electronic cigarette expansion bench experiment and prototype experiment

[0141]

[0142] Note: The electronic cigarette smoking method in the prototype experiment adopts the electronic cigarette smoking method recommended by the working group of the International Cooperation Center for Tobacco Research (CORESTA): the suction flow rate is constant, the suction volume is 55ml, the suction time is 3s, and the suction interval is 30s.

[0143] The data in the table are obtained by the following method:

[0144] Based on the puffing capacity Q, the puffing time τ1 and the inner diameter of the gas channel D2, the puffing flow rate of the electronic cigarette in the prototype experiment can be calculated as The suction rate is

[0145] According to the Reynolds number similarity criterion (υ represents characteristic velocity, l represents characteristic scale, and δ represents kinematic viscosity), it can be seen that the suction rate in the electronic cigarette expansion test bench model experiment is

[0146] According to the suction rate and the inner diameter of the gas flow, the suction flow rate in the electronic cigarette expansion test bench model experiment can be obtained as follows:

[0147] According to the boundary conditions of the energy conservation equation, the puffing time in the electronic cigarette expansion test bench model experiment is T1'=25T1=75s, the puffing interval is T2'=25T2=750s, and the heating power is P'=5P.

[0148] Furthermore, the present invention also discloses a test method of an electronic cigarette expansion test bench as follows: S1, adding liquid tobacco oil to the atomization core 3 with a burette, and stopping dripping when the atomization core 3 absorbs the tobacco oil to a saturated state;

[0149] S2. Use the electronic balance 11 to weigh and record the unused Cambridge filter 300.

[0150] S3, then add the Cambridge filter 300 into the quartz tube 4;

[0151] S4, connect one end of the thermocouple probe 8 to the temperature recorder 9, arrange the corresponding thermocouple probe 8 measuring point at the other end according to the temperature to be measured by the experimental target, and turn on the temperature recorder 9; turn on the vacuum pump 500, and adjust the gas flow meter 6 so that the suction flow of the vacuum pump 500 is 91.5 ml / s;

[0152] S5, turn on the DC regulated power supply, heat the electric heating wire 2, adjust the voltage or current value so that the output power of the power supply is 5 times the prototype test power, and then use the stopwatch 10 to start recording the power-on heating time of the electric heating wire 2;

[0153] S6, placing the thermocouple probe 8 into the small hole on the quartz tube 4, and recording the temperature of the aerosol in the tube at regular intervals;

[0154] S7, when the timing reaches 75s, turn off the DC regulated power supply and the vacuum pump 500, and use the stopwatch to start recording the suction interval time again, and when the interval time reaches 750s, turn on the DC regulated power supply and the vacuum pump 500 again; S8, repeat steps S4-S7;

[0155] S9. After the experiment, turn off the DC regulated power supply and the vacuum pump 500, take out the Cambridge filter 7 in the quartz tube 4, and use the electronic balance 11 to weigh and record the Cambridge filter 7. The mass of the total aerosol particulate matter captured by the Cambridge filter 7 can be calculated, that is, the weight increase of the filter = the weight after the experiment - the weight before the experiment.

[0156] In summary, the method for building an electronic cigarette expansion test bench provided in an embodiment of the present invention is based on the similarity principle and similar boundary condition analysis to obtain the geometric scale, electric power scale, suction flow scale, suction time scale and suction interval time scale of the electronic cigarette expansion test bench and the actual prototype of the electronic cigarette, build an electronic cigarette expansion test bench proportional to the actual prototype of the electronic cigarette, and control the suction flow, heating power, suction time and suction interval time of the electronic cigarette expansion test bench to simulate the actual suction process of the electronic cigarette, and then measure the aerosol temperature generated in the experiment and the mass of the total aerosol particulate matter captured by the capture component to obtain the measurement parameters required for the experiment, thereby solving the problem in the prior art that it is inconvenient to measure the experimental parameters due to the size limitation of the electronic cigarette.

[0157] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for building an electronic cigarette expansion test bench, characterized in that: The following steps are involved: The enlargement ratio of the atomizer core length, airflow channel length, atomizer core radius, and airflow channel diameter of the electronic cigarette expansion test bench and the actual electronic cigarette prototype is set to λ l , the heating area is enlarged by λ l 2 ; According to the similar Reynolds number and the similar suction capacity, the ratio of the suction flow rate between the electronic cigarette expansion test bench and the actual electronic cigarette prototype is determined to be λ l 2 ; According to the similarity boundary conditions, the puff time scale and the puff interval time scale of the electronic cigarette expansion test bench and the actual electronic cigarette prototype are determined as λ l 2 ; Heating power scale is λ l ; Build an electronic cigarette expansion test bench.

2. The method for constructing the electronic cigarette extension test bench according to claim 1, characterized in that: The radius of the electric heating wire of the electronic cigarette expansion test bench is set to be the same as the radius of the electric heating wire of the actual electronic cigarette prototype. According to the expansion ratio required for the heating area, the expansion ratio of the number of turns of the electric heating wire wrapped around the atomizer core in the electronic cigarette expansion test bench and the actual electronic cigarette prototype is determined as λ l .

3. An electronic cigarette extension test bench constructed by the method according to any one of claims 1-2, characterized in that: include: A suction assembly, an atomization assembly, a capture assembly, a control assembly, and an airflow channel; The atomization assembly and the airflow channel are models that are enlarged according to a set enlargement scale based on a similar principle to the actual prototype of the electronic cigarette; The atomizing assembly is used to generate aerosol; The suction component sucks the aerosol generated by the atomization component to the capture component through the air flow channel; The control component is used to control the atomization component and the suction component; The capture component is used to capture the total particulate matter in the aerosol.

4. The electronic cigarette extension test bench according to claim 3, characterized in that: The atomization assembly comprises an atomization core and an electric heating wire wound around the atomization core.

5. The electronic cigarette extension test bench according to claim 4, characterized in that: The radius of the electric heating wire remains unchanged relative to the actual prototype of the electronic cigarette, and the number of turns of the electric heating wire is enlarged according to the enlargement ratio.

6. The electronic cigarette extension test bench according to claim 3, characterized in that: The experimental platform also includes a quartz tube, and the air flow channel is formed in the quartz tube.

7. The electronic cigarette extension test bench according to claim 3, characterized in that: The control component includes: a suction control component and an electric power control component, The suction control component is used to control the suction flow, suction time and suction interval time of the suction component; The electric power control component is used to adjust the electric power and then provide electric energy to the atomization component.

8. The electronic cigarette extension test bench according to claim 7, characterized in that: The suction control assembly includes: a stopwatch and a gas flow meter; The gas flow meter is used to control the suction flow of the suction component; The stopwatch is used to control the suction time and suction interval time of the suction component.

9. The electronic cigarette extension test bench according to claim 3, characterized in that: It also includes a measuring component, which is used to measure the temperature of the atomization component, the experimental environment and the aerosol; and / or measure the mass of the total particulate matter captured in the aerosol.

10. The electronic cigarette extension test bench according to claim 9, characterized in that: The measuring components include: a thermocouple probe, a temperature recorder and an electronic balance; The thermocouple probe is connected to the temperature recorder and is used to measure the temperature of the atomization assembly, the aerosol and the experimental environment; The electronic balance is used to measure the weight of the capture component.

11. The electronic cigarette extension test bench according to claim 3, characterized in that: The capture component is a Cambridge filter.

12. The electronic cigarette extension test bench according to claim 3, characterized in that: The suction component is a vacuum pump.

13. A testing method using the electronic cigarette extension test bench according to any one of claims 3 to 12, characterized in that: The test method steps include: S1, adding liquid e-liquid to the atomizer assembly until it is saturated; S2, measuring the weight of the capture assembly and recording it; S3, placing the capture assembly in the air flow channel; S4, turning on the suction component and controlling the suction flow rate of the suction component to a suction flow rate target value; S5, controlling the heating power of the atomization component to a target value, and starting timing; S6. measuring and recording the aerosol temperature in the air flow channel at regular intervals; S7, after the heating time reaches the target puffing time value, the atomizing assembly and the puffing assembly are turned off and the timing is started again, until the target puffing interval time value is reached, and the atomizing assembly and the puffing assembly are turned on again; S8, repeat steps S4-S7; S9, closing the atomizing assembly and the suction assembly, and measuring and recording the weight of the capturing assembly.

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