Method and system for testing pet hair removal rate of air purifier

Abstract

The invention discloses an air purifier pet hair removal rate test method and system, and the method comprises the steps: injecting hair into a closed space when no air purifier is placed in the closed space, obtaining a first hair injection amount, stirring air in the closed space, waiting for the hair to stand, and obtaining a first hair remaining amount, calculating the ratio of the first residual hair amount to the first hair injection amount to obtain a hair injection rate; an air purifier is arranged in the closed space, hair is injected into the closed space, the second hair injection amount is obtained, purification is conducted through the air purifier, air is stirred in the closed space, standing is conducted after purification and stirring is stopped, and the second hair remaining amount is obtained; according to the second hair injection amount and the hair injection rate, the theoretical hair injection amount is obtained, calculation is carried out according to the difference value between the theoretical hair injection amount and the second hair remaining amount, the ratio calculation is carried out according to the difference value calculation result and the theoretical hair injection amount, and the hair removal rate of the air purifier is obtained.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purifier performance detection, and in particular relates to a pet hair removal rate test method and system for an air purifier. Background Art

[0002] Currently, domestic consumers' understanding of the use of air purifiers is mostly limited to removing haze and formaldehyde. However, with the recent surge in the number of pet owners, the problems associated with pet ownership have become increasingly prominent. Therefore, traditional air purifier manufacturers have begun to develop new air purifier products for pet-friendly applications. Currently, the test method standards for air purifier purification performance indicators mainly focus on the purification capabilities of air pollutants such as cigarette particulate matter, formaldehyde, TVOC, and odor. However, there are no corresponding test method standards for large-scale pet hair in the air in the national standard system. This leads to the risk that companies' hair removal performance indicators for pet-friendly applications may be falsely labeled and mislead consumers.

[0003] Commonly used particle purification performance indicators for domestic air purifiers are usually particulate clean air volume (PCAV) or PM2.5 removal rate. The PCAV indicator is primarily tested in accordance with the national standard GB / T 18801, "Air Purifiers." Particulate matter is generated by burning cigarettes, and cigarette aerosol is injected into a specified closed test chamber. A light scattering particle counter measures the particle number concentration at different purification times, converting the calculated PCAV value. This indicator represents the rate at which particulate matter purifies air volume per unit time. The PM2.5 removal rate indicator, on the other hand, is primarily tested in accordance with company-standard methods. Similarly, a certain concentration of cigarette aerosol is injected into a closed test chamber, and the PM2.5 mass concentration is measured before and after purification for one hour or other purification time. The PM2.5 removal rate is then calculated.

[0004] The above-mentioned particle purification performance test methods all use cigarette burning particles as the particle purification performance characterization of the air purifier. The particle size range is usually around 0.3 microns to 0.5 microns. The corresponding aerosol number concentration or mass concentration can be measured by the light scattering method. However, this method is only applicable to the detection of aerosol particles with small particle sizes and cannot reflect the purification ability of large-scale pet hair. In addition, pet hair is large in size and weight and will quickly settle on the surface of the ground. The hair aerosol concentration cannot be detected by traditional light scattering detection equipment. How to effectively characterize the air purifier's purification performance for pet hair is a common detection technology problem in the current industry. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention proposes a pet hair removal rate test method and system for an air purifier to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above objectives, the present invention provides a test method for the pet hair removal rate of an air purifier, comprising:

[0007] Without placing an air purifier in the enclosed space, injecting hair into the enclosed space to obtain a first hair injection amount in the enclosed space; after the hair injection, stirring the air in the enclosed space, allowing the air to stand after stirring, obtaining a first hair remaining amount in the enclosed space after the standing still; and calculating a hair injection rate in the enclosed space within a predetermined time based on a ratio of the first hair remaining amount to the first hair injection amount;

[0008] With an air purifier placed in the confined space, injecting hair into the confined space to obtain a second amount of hair injected into the confined space, turning on the air purifier and stirring the air in the confined space for purification for a predetermined time, turning off the air purifier after purification and stopping stirring, allowing the air to stand after stopping stirring, and obtaining a second amount of hair remaining in the confined space after standing still;

[0009] The theoretical hair injection amount is calculated by multiplying the second hair injection amount by the hair injection rate, the hair removal amount is calculated based on the difference between the theoretical hair injection amount and the second hair remaining amount, and the hair removal rate of the air purifier is obtained by calculating the ratio of the hair removal amount calculation result to the theoretical hair injection amount.

[0010] Among them, the first hair injection amount is the weight of hair injected into the confined space when no air purifier is placed in the confined space; the second hair injection amount is the weight of hair injected into the confined space when an air purifier is placed in the confined space for testing; the first hair remaining amount is the weight of hair remaining in the confined space when no air purifier is placed in the confined space; the second hair remaining amount is the weight of hair remaining in the confined space after an air purifier is placed in the confined space for testing.

[0011] Optionally, a frameless stirring ceiling fan is set at the top of the confined space and a frameless stirring fan is set near the bottom as a device for stirring and mixing the air and hair in the confined space. During the test, the frameless stirring ceiling fan and the frameless stirring fan were used to stir the air in the confined space to maintain the mixing degree of the hair in the air in the confined space.

[0012] Optionally, before turning on the purifier for purification, the air in the enclosed space is renewed and the temperature and humidity are regulated.

[0013] On the other hand, the present application provides an air purifier pet hair removal rate test system, comprising:

[0014] A test chamber, wherein a hair stirring and mixing device is provided inside the test chamber, one side of the test chamber is connected to a hair injection structure, and the other side is connected to a control structure, and the air purifier is provided inside the test chamber;

[0015] Wherein, under the condition that no air purifier is placed in the test chamber, the air, temperature and humidity of the test chamber are initialized by the control structure, hair is injected into the test chamber, and a first hair injection amount in the test chamber is obtained. The air and hair stirring and mixing device in the test chamber is operated for a predetermined time and then shut down and left to stand, and a first hair remaining amount in the test chamber after standing is obtained. The hair injection rate in the test chamber within the predetermined time is calculated based on the ratio of the first hair remaining amount to the first hair injection amount.

[0016] Under the condition that an air purifier is placed in the test chamber, the air, temperature and humidity of the test chamber are initialized through the control structure, hair is injected into the test chamber, the second hair injection amount under the test chamber is obtained, the air purifier and the air and hair stirring and mixing device in the test chamber are turned on, purification is carried out within a predetermined time, and after purification, the air purifier and the air and hair stirring and mixing device in the test chamber are turned off and left to stand, the second remaining hair amount in the test chamber after standing is obtained, the theoretical hair injection amount is calculated by multiplying the second hair injection amount by the hair injection rate, the hair removal amount is calculated according to the difference between the theoretical hair injection amount and the second remaining hair amount, and the hair removal rate of the air purifier is obtained by ratio calculation based on the calculated result of the hair removal amount and the theoretical hair injection amount.

[0017] Optionally, the hair stirring and mixing device includes a frameless stirring ceiling fan and a frameless stirring ceiling fan, wherein the frameless stirring ceiling fan is arranged at the top of the interior of the test chamber, and the frameless stirring ceiling fan is arranged at the bottom of the interior of the test chamber.

[0018] Optionally, the hair injection structure includes a pipe connected to the test chamber, a hair feeding container is provided in the middle of the pipe, and a blower is provided at one end of the pipe.

[0019] Optionally, the control structure includes an air supply duct and an air return duct connected to the test cabin, wherein the air supply duct is provided with an air purification component, and the return duct is provided with a circulating fan. The other end of the air supply duct and the return duct are connected to the test cabin and a temperature and humidity adjustment box is provided. The control structure also includes a temperature and humidity sensor provided inside the test cabin, and the temperature and humidity adjustment box performs temperature and humidity feedback adjustment on the air sent into the test cabin through the data collected by the temperature and humidity sensor.

[0020] Optionally, the temperature and humidity regulating box includes an evaporator, a humidifier, and a heater.

[0021] Optionally, a pressure relief port is provided on the top surface of the test chamber, the pressure relief port connects the test chamber with the outside, and a baffle grille is provided on the pressure relief port.

[0022] Optionally, the test chamber is grounded.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] Based on the limitations of the above-mentioned methods for characterizing the hair purification performance of pet-friendly air purifiers, this paper proposes a test method for the hair removal rate of air purifiers. This method uses a blower to suck in hair under negative pressure, places a hair characterizing substance in a confined space, and uses a gravimetric method to measure the weight of the placed hair and the weight of the residual hair after purification by the air purifier. The hair removal rate within a certain period of time can be calculated, effectively solving the technical bottleneck of the traditional light scattering method for detecting large-scale hair concentration, and avoiding the influence of subjective factors such as artificial hair placement on the hair purification performance characterization results. It is mainly manifested in the following two aspects:

[0025] 1) The air purifier hair removal rate test method of the present invention measures the purification and removal effect of the air purifier on pet hair characteristic substances within a certain time and space by gravimetric method, overcoming the defects of the light scattering counting method of traditional particulate matter purification performance indicators, and can more realistically characterize the pet hair removal rate performance parameters of the air purifier product.

[0026] 2) Based on the method of air-blast blanking suction injection, isolation from external environmental interference in a closed test chamber, and hair weighing calculation, the present invention establishes an evaluation test method for evaluating the pet hair removal and purification effect of air purifier products. This method can objectively evaluate the hair removal and purification performance of air purifier products in pet-raising scenarios, and avoid the risk of manufacturers artificially controlling test conditions and falsely labeling the hair removal and purification performance of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0028] Figure 1 Schematic diagram of the flow of a method for testing hair removal rate of an air purifier according to an embodiment of the present invention;

[0029] Figure 2 Schematic diagram of the principle of a test system for a hair removal rate test method for an air purifier according to an embodiment of the present invention;

[0030] Among them: 001-test chamber; 002-frameless stirring ceiling fan; 003-frameless stirring fan; 004-test prototype; 005-blower; 006-hair feeding container; 007-hair injection pipe; 008-grounding device; 009-pressure relief port; 010-circulating fan; 011-evaporator; 012-humidifier; 013-heater; 014-temperature and humidity adjustment box; 015-return air duct; 016-supply air duct; 017-air purification component; 018-temperature and humidity sensor. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0033] like Figure 1 As shown, this embodiment provides a test method for the pet hair removal rate of an air purifier. Based on the limitations of the current standards for air purifier purification performance test methods, the present invention proposes a test method for characterizing the hair removal rate of an air purifier, which can objectively evaluate the purification rate of an air purifier product for pet hair, and relates to the technical field of air purifier performance detection methods.

[0034] The hair removal rate of the air purifier of the present invention is also a purification performance indicator. It differs from traditional particulate matter purification performance indicators in that the pollutant characterizing the hair removal rate purification performance indicator is large-scale pet hair, which has a significantly different diameter from the pollutant characterizing the particulate matter purification performance indicator. The particle size of cigarette aerosol is generally around 0.3 microns, while the length of pet hair generally ranges from several centimeters to more than ten centimeters, far exceeding the micron-level cigarette aerosol particles. Therefore, the same detection methods cannot be used to detect its air content. The test method of this application enables effective hair removal detection using hair removal rate as a purification indicator.

[0035] In view of the above technical objectives, the present invention provides the following technical solutions:

[0036] The relevant system in this application is the experimental device, such as Figure 2As shown, the experimental device includes a test cabin 001, a frameless stirring ceiling fan 002 arranged inside the test cabin 001 and a frameless stirring ceiling fan 003 on one side of the bottom. A pressure relief port 009 is provided on the top of the test cabin 001 and is connected to a grounding device 008. A test prototype 004 is provided at the bottom of the test cabin 001. One side of the test cabin 001 is connected to a pipe 007. A hair feeding container 006 is provided in the middle of the pipe 007, and a blower 005 is provided at one end for blowing the hair in the hair feeding container 006 into the test cabin 001 through the pipe 007.

[0037] During the initialization and post-processing stages, the test cabin 001 circulates the air in the cabin through the supply air duct 016 and the return air duct 015 connected to the other side away from the pipeline 007. The supply air duct 016 and the return air duct 015 are respectively provided with an air purification component 017 and a circulating fan 010, and a temperature and humidity adjustment box 014 is provided at the end of the supply air duct 016 and the return air duct 015 away from the test cabin 001, which is used to adjust the air and temperature and humidity inside the test cabin 001. The temperature and humidity adjustment box 014 is provided with an evaporator 011, a humidifier 012 and a heater 013. A temperature and humidity sensor 018 is provided inside the test cabin 001 for real-time detection of the temperature and humidity in the test cabin 001.

[0038] Specifically, the volume of the test chamber 001 in this embodiment is a typical value of 3m 3 , 10m can be selected according to test requirements 3 、30m 3 For other sizes and specifications, the test chamber should meet the technical requirements specified in QB / T 5364; the hair injection pipe 007, return air pipe 015, supply air pipe 016, and pressure relief port 010 are connected to the test chamber 001, and a built-in pipe valve is used to open and close the front and rear air paths of the pipeline.

[0039] The temperature and humidity regulating box 014 includes an evaporator 011, a humidifier 012, and a heater 013. When used in conjunction with the return air duct 015, the circulating fan 010, the supply air duct 016, and the temperature and humidity sensor 018, the temperature and humidity regulating box 014 has a PID dynamic feedback control function. According to the preset temperature and relative humidity, the air in the cabin can be circulated through the return air duct 05, the supply air duct 016, and the circulating fan 010. Combined with the real-time monitoring values ​​of the cabin air temperature and relative humidity by the temperature and humidity sensor 018 and the PID dynamic feedback control function of the temperature and humidity regulating box 014, the operating power of the three components of the evaporator 011, the humidifier 012, and the heater 013 can be adjusted in real time, thereby realizing the regulation and control of the cabin air temperature and relative humidity of the test cabin 001.

[0040] Frameless stirring ceiling fan 002 and frameless stirring fan 003 are both used to stir the hair inside test chamber 001. Preferably, frameless stirring fan 003 is set at a height of 0.2m-0.7m from the bottom plate. One or more can be set to maintain the uniformity of hair mixing in the air inside the chamber. Pressure relief vent 009 is used to maintain the balance of air pressure inside and outside the chamber. When the air pressure inside the chamber is greater than the air pressure outside the chamber, the air inside the chamber is released from the inside to the outside to dynamically maintain the air pressure inside and outside the chamber to a balanced state. In addition, pressure relief vent 009 is equipped with a baffle grille to reduce the loss of hair escaping from the pressure relief vent. The interior of air purification component 017 is composed of HEPA high-efficiency air filters, gaseous pollutant adsorption catalytic decomposition materials, etc., which are used to purify and remove air pollutants such as particulate matter, formaldehyde, TVOC, etc. in the air, reducing the impact of air background on the hair removal rate test results. The interior of test chamber 001 contains frameless stirring ceiling fan 002, frameless stirring fan 003, test prototype 004, and temperature and humidity sensor 018.

[0041] like Figure 1 As shown, in this embodiment, the test method includes steps S1-S12. The specific implementation steps are as follows:

[0042] Step S1: Process and control the air background and temperature and humidity in the test cabin 001, open the return air duct 015 and the supply air duct 016 valves, run the exhaust fan 010, the temperature and humidity adjustment box 014, the evaporator 011, the humidifier 012, the heater 013 and the temperature and humidity sensor 018, set the control target range of the cabin temperature and relative humidity of the test cabin 001, and the typical test value range of the cabin temperature and relative humidity is (23±2)℃ and (50±10)% respectively. When the temperature and relative humidity are stable within the control target range and the particulate matter and gaseous pollutants in the test cabin air drop to the limit requirements specified in the national standard GB / T 18883 indoor air quality standard, turn off the circulating fan 010, the temperature and humidity adjustment box 014, the evaporator 011, the humidifier 012 and the heater 013, close the return air duct 015 and the supply air duct 016 valves, and proceed to the next step.

[0043] Step S2: Weigh the hair feeding container 006 containing the pet hair standard substance for testing, record the weight before feeding the hair, and proceed to the next step.

[0044] Step S3: Turn on the blower 005, the frameless stirring fan 002 and the frameless stirring fan 003. The pet hair standard substance in the hair feeding container 006 is sucked in through the hair injection pipe 007 and then injected into the test chamber 001. After the injection is completed, turn off the blower 005, close the valve of the hair injection pipe 007, and then continue stirring for a certain time. Preferably, in this embodiment, the stirring time after the hair injection is completed is 5 minutes. After the time is up, turn off the frameless stirring fan 002, weigh the hair feeding container 006, record the weight after the hair is added, and then proceed to the next step.

[0045] Step S4: Preferably, the hair test time of the test in this embodiment is 0.5h. The hair test time starts after the hair injection is completed in step 3. After the hair test time reaches 0.5h, the frameless stirring fan 003 is turned off and the next step is performed.

[0046] Step S5: After the previous step is completed, continue to stand for a certain period of time. Preferably, in this embodiment, the standing time is 0.5 hours. After the standing time reaches 0.5 hours, the remaining hair in the test chamber is collected, the collected residual hair in the chamber is weighed, and then the next step is carried out.

[0047] Step S6: Purify and exhaust the air in the test cabin 001, open the return air duct 015 and the supply air duct 016 valves, run the circulation fan 010, and reduce the particulate matter and gaseous pollutants in the test cabin air to the limit requirements specified in the national standard GB / T 18883 indoor air quality standard. Then, turn off the circulation fan 010, close the return air duct 015 and the supply air duct 016 valves, and clean the interior of the test cabin 001.

[0048] Step S7: Calculate the hair injection rate. The hair weight before and after injection in the hair feeding container 006, obtained in steps S2 and S3, is calculated. The difference between the two is the hair injection weight in the test chamber 001. The hair weight remaining in the test chamber 001, obtained in step S5, is calculated. The hair injection rate is the percentage of the hair weight remaining in the chamber to the hair injection weight. Proceed to the next step.

[0049] Step S8: Place the test prototype 004 in the center of the test chamber 001, connect the power supply, ensure that the test prototype 004 can run according to the test gear, then put the test prototype 004 in standby state, and perform tests in sequence according to steps S1, S2, and S3, and then proceed to step one.

[0050] Step S9: Run the purification function according to the test gear of the test prototype 004. Preferably, the purification time of the test in this embodiment is 0.5h. After the purification time reaches 0.5h, turn off the purification function of the test prototype 004, turn off the frameless stirring fan 003, and proceed to the next step.

[0051] Step S10: After the previous step is completed, continue to stand for a certain period of time. Preferably, in this embodiment, the standing time is 0.5 hours. After the standing time reaches 0.5 hours, the remaining hair in the test chamber is collected, the collected residual hair in the chamber is weighed, and then the next step is carried out.

[0052] Step S11: Purify and exhaust the air in the test cabin 001, open the return air duct 015 and the supply air duct 016 valves, run the circulation fan 010, and reduce the particulate matter and gaseous pollutants in the test cabin air to the limit requirements specified in the national standard GB / T 18883 indoor air quality standard. Then, turn off the circulation fan 010, close the return air duct 015 and the supply air duct 016 valves, and clean the interior of the test cabin 001.

[0053] Step S12: Calculate the hair removal rate. The hair weight before and after hair feeding container 006 is obtained in step S9. The difference between the two is the hair injection weight of test chamber 001 during the test of test prototype 004. The weight of residual hair in test chamber 001 is obtained in step S10. The theoretical hair injection amount is obtained by multiplying the hair injection weight by the hair injection rate in step S7. The difference between the theoretical hair injection amount and the weight of residual hair in the chamber is the hair removal amount. The percentage of the hair removal amount to the theoretical hair injection amount is the hair removal rate of test prototype 004.

[0054] Regarding the above-mentioned hair removal rate test method, the above-mentioned numbered processes are only the preferred sequential process execution content, and are limited. The test acquisition process for the hair injection rate and the test acquisition process for the weight of residual hair in the cabin after purification can be interchanged without limitation.

[0055] It should be noted that the hair injection rate is the injection rate of hair into the air in the test chamber 001 after the above-mentioned frameless stirring ceiling fan 002 and frameless stirring fan 003 are used and there is no air purifier 004. The use of this indicator can reduce the interference of the frameless stirring ceiling fan 002 and frameless stirring fan 003 and other influencing factors, so that the final removal rate result calculation is more accurate.

[0056] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A test method for pet hair removal rate of an air purifier, characterized in that: include: Without placing an air purifier in the enclosed space, hair is injected into the enclosed space to obtain a first hair injection amount in the enclosed space. After the hair is injected, the air in the enclosed space is stirred, and the stirring is stopped and the air is allowed to stand to obtain a first hair remaining amount in the enclosed space after the standing still. A hair injection rate in the enclosed space within a predetermined time is calculated based on a ratio of the first hair remaining amount to the first hair injection amount. With an air purifier placed in the confined space, injecting hair into the confined space to obtain a second amount of hair injected into the confined space, turning on the air purifier and stirring the air in the confined space for purification for a predetermined time, turning off the air purifier after purification and stopping stirring, allowing the air to stand after stopping stirring, and obtaining a second amount of hair remaining in the confined space after standing still; The theoretical hair injection amount is calculated by multiplying the second hair injection amount by the hair injection rate, the hair removal amount is calculated based on the difference between the theoretical hair injection amount and the second hair remaining amount, and the hair removal rate of the air purifier is obtained by calculating the ratio of the hair removal amount calculation result to the theoretical hair injection amount.

2. The method according to claim 1, characterized in that A frameless stirring ceiling fan is arranged at the top of the confined space and a frameless stirring fan is arranged near the bottom. The frameless stirring ceiling fan and the frameless stirring fan are used to stir the air in the confined space to maintain the uniformity of the hair in the air in the confined space.

3. The method according to claim 1, characterized in that Before turning on the purifier for purification, the air in the enclosed space should be renewed and the temperature and humidity should be regulated.

4. An air purifier pet hair removal rate test system corresponding to the method according to any one of claims 1 to 3, characterized in that: include: A test chamber, wherein a hair stirring and mixing device is provided inside the test chamber, one side of the test chamber is connected to a hair injection structure, and the other side is connected to a control structure, and the air purifier is provided inside the test chamber; Wherein, under the condition that no air purifier is placed in the test chamber, the air, temperature and humidity of the test chamber are initialized by the control structure, hair is injected into the test chamber, and a first hair injection amount in the test chamber is obtained. The air and hair stirring and mixing device in the test chamber is operated for a predetermined time and then shut down and left to stand, and a first hair remaining amount in the test chamber after standing is obtained. The hair injection rate in the test chamber within the predetermined time is calculated based on the ratio of the first hair remaining amount to the first hair injection amount. Under the condition that an air purifier is placed in the test chamber, the air, temperature and humidity of the test chamber are initialized through the control structure, hair is injected into the test chamber, the second hair injection amount under the test chamber is obtained, the air purifier and the air and hair stirring and mixing device in the test chamber are turned on, purification is carried out within a predetermined time, and after purification, the air purifier and the air and hair stirring and mixing device in the test chamber are turned off and left to stand, the second remaining hair amount in the test chamber after standing is obtained, the theoretical hair injection amount is calculated by multiplying the second hair injection amount by the hair injection rate, the hair removal amount is calculated according to the difference between the theoretical hair injection amount and the second remaining hair amount, and the hair removal rate of the air purifier is obtained by ratio calculation based on the calculated result of the hair removal amount and the theoretical hair injection amount.

5. The system according to claim 4, characterized in that The hair stirring and mixing device comprises a frameless stirring ceiling fan and a frameless stirring ceiling fan, wherein the frameless stirring ceiling fan is arranged at the top of the interior of the test chamber, and the frameless stirring ceiling fan is arranged at the bottom of the interior of the test chamber.

6. The system according to claim 4, characterized in that The hair injection structure comprises a pipeline connected to the test chamber, a hair feeding container is provided in the middle of the pipeline, and a blower is provided at one end of the pipeline.

7. The system according to claim 4, wherein: The control structure includes an air supply duct and an air return duct connected to the test cabin, wherein the air supply duct is provided with an air purification component, and the return duct is provided with a circulating fan. The other end of the air supply duct and the return duct are connected to the test cabin and a temperature and humidity adjustment box is provided. The control structure also includes a temperature and humidity sensor arranged inside the test cabin, and the temperature and humidity adjustment box performs temperature and humidity feedback adjustment on the air sent into the test cabin through the data collected by the temperature and humidity sensor.

8. The system according to claim 7, characterized in that The temperature and humidity adjustment box includes an evaporator, a humidifier, and a heater.

9. The system according to claim 4, wherein: A pressure relief port is provided on the top surface of the test chamber, the pressure relief port connects the test chamber with the outside, and a baffle grille is provided on the pressure relief port.

10. The system according to claim 4, wherein: The test cabin is grounded.

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