Method for testing aging life of odor removal module for odor removal of new refrigerator

Abstract

The invention discloses an aging life test method of a deodorizing module for deodorizing a new refrigerator, and the aging life test method of the deodorizing module for deodorizing the new refrigerator comprises the following steps: S1, building a test environment; s2, initial concentration testing: putting the odor removal module into a sealed test box, closing the sealed test box after the odor removal module is put into the sealed test box, injecting a trimethylamine aqueous solution into the surface of a heating sheet in the sealed test box, starting the heating sheet, closing the heating sheet after the trimethylamine aqueous solution is completely volatilized, and starting a circulating fan in the test box for 3 minutes; detecting the initial concentration C0 in the test box by using a trimethylamine detection tube, and closing the test box after the circulating fan runs for 2 hours; s3, calculating the removal rate and removal amount of trimethylamine; s4, purifying; s5, aging treatment; s6, aging test; s7, repeated aging treatment; s8, judging service life suspension: if the odor removal rate of the odor removal module in S7 rebounds to be greater than 50%, continuing to perform aging treatment according to S5; and if the odor removal rate is still lower than 50%, judging that the service life Tm of the module is ended.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new refrigerator deodorization, and particularly relates to a deodorization module aging life test method for new refrigerator deodorization. BACKGROUND

[0002] The new refrigerator odor refers to the odor emitted by various materials in the new refrigerator when the refrigerator is parked in the warehouse. The odor-producing materials mainly include HIPS inner container, PP drawer, TPP tape, EPS foam, GPPS bottle frame and PE tape. Research shows that these materials can emit gas molecules containing alkanes, aldehydes, benzene and esters.

[0003] The new refrigerator odor is not friendly to consumers on the one hand, and is harmful to the image of the refrigerator factory on the other hand. The new refrigerator odor is harmful to the human body: benzene is a carcinogen, and aldehyde can cause leukemia. For consumers, when a high-end refrigerator has a strong plastic smell or other unpleasant odor at the moment of opening the door, the consumer will feel that the purchase of the refrigerator is unpleasant. Therefore, to avoid these problems, solving the new refrigerator odor is an urgent problem for the refrigerator factory.

[0004] There are three main methods for removing the new refrigerator odor on the market: 1. activated carbon adsorption, 2. potassium permanganate oxidation, and 3. raw material control.

[0005] Among them, the activated carbon adsorption utilizes the high-density microporous structure channel in the activated carbon to physically adsorb the odor molecules in the pore structure through capillary effect. For example, the patent No. 104707160A discloses a refrigerator deodorization device, which includes a refrigerator fan, the fan includes a fan cover and a fan body, characterized in that a recessed part is arranged on the inner wall surface of the fan cover, and an activated carbon layer is arranged in the recessed part. The fan cover is provided with a plurality of ventilation strips. This method can adsorb odor molecules, but there is a problem of overflow of saturated odor molecules, the service life is short, and in addition, the activated carbon has poor adsorption effect on aldehyde substances, and cannot completely achieve the adsorption and purification effect. Moreover, the deodorization device must be used in cooperation with the refrigerator after power-on, which is called active deodorization in the industry. For example, the patent No. CN2447051Y discloses a refrigerator deodorization sheet, which claims to solve the drawbacks of activated carbon deodorization, but it still needs to be used in cooperation with the refrigerator after power-on. For new refrigerators, the device is useless.

[0006] Potassium permanganate method is to use the strong oxidizing property of potassium permanganate to remove the easily reduced gas in the peculiar smell of new refrigerator, such as the patent No. CN106620794A discloses a refrigerator deodorant and its preparation method, which is composed of the following weight parts of raw materials: component A 2 parts, component B 2-3 parts; the component A is composed of the following weight parts of raw materials: water 60-70 parts, potassium permanganate 3-8 parts, ethanol 5-10 parts, copper sulfate 1-3 parts, lactic acid 2-4 parts, ethylene glycol methyl ether 1-3 parts, zeolite molecular sieve 20-40 parts; the component B is composed of the following weight parts of raw materials: coconut shell charcoal 35-45 parts, diatomite 25-35 parts, polyvinyl acetate 8-13 parts, antibacterial agent 1-2 parts, water 10-25 parts, but this deodorant containing potassium permanganate has no effect on the gas with stable molecular structure, and the deodorizing effect is not satisfactory;

[0007] And although the method of solving peculiar smell by controlling raw materials can reduce the occurrence of peculiar smell at the source, this method leads to huge cost of raw materials, causes great profit pressure to enterprises, and the control of raw materials can only reduce the generation of peculiar smell but cannot completely solve the problem of peculiar smell, so that new refrigerator still has peculiar smell;

[0008] The applicant proposes a passive deodorizing deodorizing module which adopts the way of adsorption and decomposition to adsorb and decompose the peculiar smell in the refrigerator, but since it is a passive deodorizing way, it cannot be directly matched with the parts in the refrigerator to test the service life and aging life, and the conventional method is difficult to test the aging life of the product, so it is necessary to improve it. SUMMARY

[0009] The technical problem to be solved by the present application is to solve the problems of the prior art,

[0010] The application provides a deodorizing module aging life test method for peculiar smell removal of new refrigerator.

[0011] To achieve the above object, the application provides the following technical scheme: a deodorizing module aging life test method for peculiar smell removal of new refrigerator, comprising the following steps:

[0012] S1: building a test environment: including a sealed test box with a volume V of 100L, the material of the sealed test box is acrylic and contains heating pieces, circulating fans, valves, purification devices, and 33% bottled trimethylamine aqueous solution, and a sample injection needle;

[0013] S2 initial concentration test: place the odor removal module in the sealed test box, close the sealed test box, inject trimethylamine aqueous solution on the surface of the heating sheet in the sealed test box, turn on the heating sheet, after the trimethylamine aqueous solution is completely volatilized, turn off the heating sheet, after 3 minutes, use the trimethylamine detection tube to detect the initial concentration C0 in the test box, and then turn off the test box after 2 hours of circulation fan operation;

[0014] S3 calculate the trimethylamine removal rate and removal amount: use the trimethylamine detection tube to detect the residual concentration C 1； , calculate the trimethylamine removal rate η0 and the trimethylamine removal amount Y;

[0015] S4 purification: turn on the purification device to purify the inside of the sealed test box;

[0016] S5 aging treatment: inject trimethylamine aqueous solution on the surface of the heating sheet in the sealed test box, turn on the heating sheet, after the trimethylamine aqueous solution is completely volatilized, turn off the heating sheet, test the initial aging concentration A after 3 minutes, turn on the circulation fan after the test is completed, and measure the residual trimethylamine concentration B after 4 hours of operation; calculate the removal rate of trimethylamine in the aging treatment according to the initial aging concentration A, the residual trimethylamine concentration B and the volume of the sealed test box; (aging treatment)

[0017] S6 aging test: take a new odor removal module and perform the first aging treatment according to the operation method of S5, and calculate the trimethylamine removal amount X1 of the first aging treatment; after the aging treatment, turn on the purification device to purify the test box for 2 hours, then perform the module odor removal rate test according to S3, and calculate the odor removal rate and the trimethylamine removal amount in the odor removal rate test;

[0018] S7 repeated aging treatment: if the odor removal rate calculated in S6 is greater than 50%, repeat S5 again to determine the odor removal rate after aging; when the module has been aged for the i-th time, place the module in the purified test box, and measure the odor removal rate after 24 hours;

[0019] S8 life termination determination: if the odor removal rate of the module in S7 rebounds to greater than 50%, continue to perform the aging treatment according to S5; if the odor removal rate is still less than 50%, determine that the module life Tm is terminated.

[0020] The above-mentioned method for testing the aging life of the odor removal module for new refrigerators can be further provided that the odor removal module and the circulation fan are placed in parallel in S1, and the distance is controlled to be 10-20 cm.

[0021] The above-mentioned method for testing the aging life of the odor removal module for new refrigerators can be further provided that in S2, the trimethylamine concentration in the sealed test box is controlled to be 2 mg / m 3 -12 mg / m3 .

[0022] The aging life test method for the deodorization module of the new refrigerator can be further provided as follows: in S5, the trimethylamine concentration in the sealed test box is controlled to be 28 mg / m 3 - 32 mg / m 3 .

[0023] The aging life test method for the deodorization module of the new refrigerator can be further provided as follows: in S6, the time interval between the aging treatment and the next aging treatment is 24 h.

[0024] The aging life test method for the deodorization module of the new refrigerator can be further provided as follows: in S3, the formula for calculating the trimethylamine removal rate η0 and the trimethylamine removal amount Y is respectively: η0 = [(C0-C1) / C0]×100%, Y = (C0-C1)×V.

[0025] The aging life test method for the deodorization module of the new refrigerator can be further provided as follows: in S5, the formula for calculating the trimethylamine removal rate in the aging treatment according to the initial aging concentration A, the residual trimethylamine concentration B and the sealed test box volume is: X = (A-B)×V.

[0026] The aging life test method for the deodorization module of the new refrigerator can be further provided as follows: in S8, the module life Tm is calculated according to the following formula:

[0027]

[0028] By adopting the technical solution, the performance change of the deodorization module after long-term use can be quickly evaluated through specific aging treatment steps, so as to predict the service life. Through the calculation of the accurate trimethylamine removal rate and removal amount, a quantitative evaluation method for the performance of the deodorization module is provided. Through repeated aging treatment and odor removal rate test, the performance degradation of the deodorization module can be continuously monitored until the standard of the end of life is reached. The use of the purification device during the test process can ensure the cleanliness of the test environment, avoid cross contamination, and improve the accuracy of the test. Through the standardized test process and parameter setting, the test operation is simplified, so that the test process is easier to perform and repeat. Through the calculation formula of the module life Tm, the service life of the deodorization module can be predicted, which provides a scientific basis for production and maintenance. By adjusting the trimethylamine concentration and the placement distance of the module and the fan, the test method can adapt to different environmental conditions and module specifications. Through this test method, it can be ensured that the refrigerator deodorization module meets specific performance and life requirements before being put on the market, improving the reliability and user satisfaction of the product.

[0029] The beneficial effects of the present application: through rapid aging treatment and accurate quantitative evaluation method, the efficiency and accuracy of the refrigerator deodorizing module performance test are significantly improved, it not only can continuously monitor the degradation of product performance, predict the service life, but also simplify the operation through the standardized test process, enhance the reliability and user satisfaction of the product. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The flowchart of the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0031] Reference Figure 1 As shown in the figure, a deodorizing module aging life test method for new refrigerator deodorization, comprising the following steps:

[0032] S1 Build test environment: including a sealed test box with a volume V of 100L, the sealed test box can refer to the box disclosed in the invention patent with the patent number CN117347504A and the patent name: deodorizing capacity test method and device of deodorizing module of household electrical appliance, the sealed test box is made of acrylic and contains heating sheet, circulating fan, valve, purification device, and 33% bottled trimethylamine aqueous solution, sampling needle;

[0033] S2 Initial concentration test: place the deodorizing module in the sealed test box, close the sealed test box after placing, use the sampling needle to inject trimethylamine aqueous solution on the surface of the heating sheet in the sealed test box, turn on the heating sheet, after the trimethylamine aqueous solution is completely volatilized, turn off the heating sheet, turn on the circulating fan in the test box for 3min, then use trimethylamine detection tube to detect the initial concentration Co in the test box, and turn off the circulating fan after running for 2h;

[0034] S3 Calculate trimethylamine removal rate and removal amount: use trimethylamine detection tube to detect residual concentration C 1； , calculate trimethylamine removal rate η0 and trimethylamine removal amount Y;

[0035] S4 Purification: turn on the purification device to purify the inside of the sealed test box;

[0036] S5 Aging treatment: use the sampling needle to inject trimethylamine aqueous solution on the surface of the heating sheet in the sealed test box, turn on the heating sheet, after the trimethylamine aqueous solution is completely volatilized, turn off the heating sheet, test the aging initial concentration A after 3min, turn on the circulating fan after the test is completed, measure the residual trimethylamine concentration B after running for 4h, and calculate the removal rate of trimethylamine in the aging treatment according to the aging initial concentration A, the residual trimethylamine concentration B and the volume of the sealed test box;(aging treatment)

[0037] S6 aging test: take the unused odor removal module according to the operation method of S5 to carry out the first aging treatment, and calculate the first aging treatment trimethylamine removal amount X1, after the aging treatment, start the purification device, purify the test box for 2h, then carry out the module odor removal rate test according to S3, and calculate the odor removal rate and the trimethylamine removal amount in the odor removal rate test;

[0038] S7 repeated aging treatment: if the odor removal rate calculated in S6 is greater than 50%, S5 is repeated again to determine the odor removal rate after aging. When the odor removal rate of the module is lower than 50% after the i-th aging, the module is placed in the purified test box, and the odor removal rate is measured after 24h;

[0039] S8 life termination determination: if the odor removal rate of the module in S7 rebounds to greater than 50%, continue to carry out the aging treatment according to S5; if the odor removal rate is still lower than 50%, it is determined that the module life Tm is terminated;

[0040] In S1, the odor removal module and the circulating fan are placed in parallel, and the distance is controlled to be 10-20cm;

[0041] In S2, when the trimethylamine solution is injected into the surface of the heater in the sealed test box, the trimethylamine concentration in the sealed test box is controlled to be 2mg / m 3 -12mg / m 3 ;

[0042] In S5, when the trimethylamine solution is injected into the surface of the heater in the sealed test box, the trimethylamine concentration in the sealed test box is controlled to be 28mg / m 3 -32mg / m 3 ;

[0043] In S6, the time interval between the aging treatment and the next aging treatment is 24h;

[0044] In S3, the formula for calculating the trimethylamine removal rate η0 and the trimethylamine removal amount Y is respectively: η0 = [(C0-C1) / C0]x100%, Y=(C0-C1)xV;

[0045] Y is the trimethylamine removal amount in the odor removal rate test;

[0046] C0 is the initial concentration of trimethylamine in the odor removal rate test;

[0047] C1 is the residual concentration of trimethylamine in the odor removal rate test;

[0048] V is the volume of the test box (m 3 );

[0049] In S5, the formula for calculating the trimethylamine removal rate in the aging treatment according to the initial concentration A, the residual trimethylamine concentration B and the volume of the sealed test box is: X=(A-B)xV;

[0050] In the formula, X represents the amount of trimethylamine removed during the aging process (mg).

[0051] A – Initial concentration of trimethylamine during aging treatment (mg / m³) 3 );

[0052] B—Residual trimethylamine concentration during aging treatment (mg / m³) 3 );

[0053] V — Test chamber volume (m³) 3 );

[0054] In S8, the module lifetime Tm is calculated using the following formula:

[0055]

[0056] Tm — Module lifespan, in years. Test results are retained to one significant figure.

[0057] n — the number of times the module has undergone aging treatment at the end of its lifespan;

[0058] Xi — Trimethylamine removal amount (mg) during the i-th aging process;

[0059] Yi – The amount of trimethylamine removed (mg) in the deodorization rate test after the i-th aging treatment;

[0060] C limit—the daily standard emission limit for trimethylamine gas [1], is 0.05 mg / m³. 3 ;

[0061] V — Test chamber volume (m³) 3 );

[0062] 365 — a constant;

[0063] Through specific aging treatment steps, the performance changes of the deodorizing module after long-term use can be quickly assessed, thereby predicting its lifespan. Precise calculation of trimethylamine removal rate and amount provides a quantitative method for evaluating the performance of the deodorizing module. Repeated aging treatments and deodorization rate tests allow for continuous monitoring of the module's performance degradation until it reaches the end-of-life standard. The use of a purification device during testing ensures a clean testing environment, avoids cross-contamination, and improves testing accuracy. Standardized testing procedures and parameter settings simplify testing operations, making the process easier to execute and repeat. The module lifespan Tm calculation formula can predict the deodorizing module's lifespan, providing a scientific basis for production and maintenance. By adjusting the trimethylamine concentration and the placement distance between the module and the fan, the testing method can adapt to different environmental conditions and module specifications. This testing method ensures that refrigerator deodorizing modules meet specific performance and lifespan requirements before being launched to the market, improving product reliability and user satisfaction.

Claims

1. A method for testing the aging life of a deodorization module for new refrigerator deodorization, comprising the following steps: S1: Set up the test environment, including a sealed test box with a volume of 100 L, made of acrylic and containing heating plates, circulating fans, valves, purification devices, and a 33% trimethylamine aqueous solution, and a sample injection needle; S2: Initial concentration test: Place the odor removal module in the sealed test box, close the test box, inject the trimethylamine aqueous solution onto the surface of the heating plates, turn on the heating plates, and after the trimethylamine aqueous solution is completely volatilized, turn off the heating plates, turn on the circulating fans in the test box for 3 minutes, then use a trimethylamine detection tube to detect the initial concentration C0 in the test box, and turn off the circulating fans after 2 hours of operation; S3 Calculate trimethylamine removal rate and removal amount: use trimethylamine detection tube to detect residual concentration C 1； , calculate trimethylamine removal rate η0and trimethylamine removal amount Y; S4: Purification: Turn on the purification device to purify the inside of the sealed test box; S5: Aging treatment: Inject the trimethylamine aqueous solution onto the surface of the heating plates in the sealed test box, turn on the heating plates, and after the trimethylamine aqueous solution is completely volatilized, turn off the heating plates, test the initial concentration A after 3 minutes, turn on the circulating fans after the test is completed, and measure the residual trimethylamine concentration B after 4 hours of operation; calculate the removal rate of trimethylamine during the aging treatment according to the initial concentration A, the residual trimethylamine concentration B, and the volume of the sealed test box; S6: Aging test: Take a new odor removal module and perform the first aging treatment according to the operation method of S5, calculate the trimethylamine removal amount X1 of the first aging treatment, turn on the purification device after the aging treatment, purify the test box for 2 hours, and then perform the module odor removal rate test according to S3, and calculate the odor removal rate and the trimethylamine removal amount during the odor removal rate test; S7: Repeat the aging treatment: If the odor removal rate calculated in S6 is greater than 50%, repeat S5 to measure the odor removal rate after aging; when the module has been aged for the i-th time, place the module in the purified test box and measure its odor removal rate after 24 hours; 2. The method for testing the aging life of the deodorization module for new refrigerator deodorization according to claim 1, characterized in that: S8: End of life determination: If the odor removal rate of the module in S7 rebounds to greater than 50%, continue the aging treatment according to S5; if the odor removal rate is still less than 50%, determine that the module life Tm is terminated.

3. The method for testing the aging life of the deodorization module for new refrigerator deodorization according to claim 1, characterized in that: In S2, trimethylamine solution is injected onto the heater surface in the sealed test chamber while controlling the trimethylamine concentration in the sealed test chamber to be 2 mg / m 3 -12 mg / m 3 .

4. The method for testing the aging life of the deodorization module for new refrigerator deodorization according to claim 1, characterized in that: The concentration of trimethylamine in the sealed test chamber is controlled at 28 mg / m3 when the trimethylamine solution is injected onto the surface of the heater in S5. 3 - 32 mg / m3 3 .

5. The method for testing the aging life of the deodorization module for deodorizing new refrigerators according to claim 1, characterized in that: In S1, the odor removal module and the circulating fans are placed in parallel with a distance of 10-20 cm.

6. The method for testing the aging life of the deodorization module for new refrigerator deodorization according to claim 1, characterized in that: In S6, the time interval between each aging treatment and the next aging treatment is 24 hours.

7. The method for testing the aging life of the deodorization module for deodorizing new refrigerators according to claim 1, characterized in that: In S3, the formula for calculating the trimethylamine removal rate η0 and the trimethylamine removal amount Y is: η0 = [(C0-C1) / C0] × 100%, Y = (C0-C1) × V.

8. The method for testing the aging life of the deodorization module for deodorizing new refrigerators according to claim 1, characterized in that: In S5, the formula for calculating the trimethylamine removal rate during the aging treatment according to the initial concentration A, the residual trimethylamine concentration B, and the volume of the sealed test box is: X = (A-B) × V. In S8, the module life Tm is calculated according to the following formula:

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