Device and method for rapidly testing detergency of detergent

Abstract

The invention discloses a device and a method for rapidly testing the detergency of a detergent, and relates to the technical field of detergent cleaning test. The device comprises a stain box, a washing test box, a displacement assembly, a lifter, a lifting plate and a test rod with a test ring groove and a smooth ring surface. Wherein the stain box comprises a plurality of independent stain cavities and is provided with a distance probe and a filling pipe. A flowing cavity, a shunting channel and an ultrasonic vibrator are arranged in the washing test box. The displacement assembly comprises a guide rod, a linear motor and a travel switch. According to the method, different stains are synchronously attached to the test rod, and after washing liquid flowing and ultrasonic vibration washing are conducted under the unified condition, stain residues are detected, and the decontamination effect is evaluated. According to the invention, synchronous testing of multiple stains is realized, manual operation and batch deviation are reduced, washing parameters are stably regulated and controlled, and testing efficiency, repeatability and result reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detergent cleaning test, and in particular to a device and method for quickly testing the detergency of a detergent. Background Art

[0002] In the research and development, production and quality inspection of detergent products, the testing of detergent detergency is a key link, and its results directly affect product formula optimization, performance evaluation and market competitiveness.

[0003] Currently, the existing detergent detergency testing methods have the following problems:

[0004] First, the testing process relies heavily on manual operations, such as manually applying stains and controlling washing conditions. Not only are the steps cumbersome and time-consuming, but the test results are also prone to poor repeatability and low accuracy due to differences in human operations.

[0005] Secondly, it is difficult to achieve simultaneous testing of multiple different types of stains. If you need to compare the decontamination effects under different stains, you often need to do it in batches, which is inefficient. In addition, the environmental conditions (such as temperature and washing time) between different batches are prone to deviations, affecting the accuracy of the comparison.

[0006] Third, during the washing test, parameters such as the flow state of the washing liquid and mechanical force (such as vibration and stirring) are difficult to stably control, resulting in inconsistent washing intensity under the same test conditions, further reducing the reliability of the test results.

[0007] In summary, how to achieve simultaneous cleaning effect testing of multiple stains under the same detergent parameter conditions and improve test efficiency and the accuracy and stability of results has become a technical problem that needs to be solved in the field of detergent detergency testing. Summary of the Invention

[0008] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0009] The present invention provides a device for quickly testing the detergency of detergents, comprising a stain box and a washing test box. The stain box is provided with a plurality of independent stain chambers, each of which pre-stores a different type of stain source. Each stain chamber is equipped with a distance probe for detecting the height of the stain storage, and the bottom of each stain chamber is independently connected to a filling pipe for injecting liquid stains.

[0010] The washing test box is equipped with a flow chamber, within which multiple diverter plates are arranged in parallel, forming multiple diverter channels. Each diverter channel's bottom plate is embedded with an ultrasonic vibrator. The washing test box is also connected to a washing liquid supply pipe and a turbid liquid discharge pipe, both of which are connected to the flow chamber. A displacement assembly is positioned above the stain box and the washing test box. The displacement assembly is connected to a lifter on its underside, the lifter's lower end of the lifting shaft being fixedly connected to a lifting plate, which in turn is fixedly connected to the underside of multiple test rods. The test rod rings are provided with multiple test ring grooves. The non-test ring groove side of the test rod ring is smooth, while the inner wall of the test ring groove is rough.

[0011] As a preferred technical solution of the testing device of the present invention, a slot is defined in the top plate of the stain box, facing the stain chamber. A cleaning portion is disposed within the slot, contacting a smooth annular surface. The cleaning portion is constructed of a rubber ring with chamfered edges at both the top and bottom. A fixing portion is disposed at the top of the test rod. The fixing portion is smaller in width than the inner diameter of the cleaning portion and is fixedly connected to the bottom surface of the lifting plate.

[0012] As a preferred technical solution of the testing device of the present invention: the widths of the various diversion channels are the same, and the top of the diversion plate is flush with the top of the washing test box.

[0013] As a preferred technical solution of the testing device of the present invention: a plurality of label slots are provided on the side of the lifting plate, and each label slot is independently aligned with a testing rod.

[0014] As a preferred technical solution of the testing device of the present invention: the inner diameter of the test ring groove of the test rod decreases from bottom to top, and the vertical width of the test ring groove of the test rod increases from bottom to top, that is, the higher the position of the test ring groove, the greater its horizontal groove depth and the greater its vertical opening width.

[0015] As a preferred technical solution of the testing device of the present invention, the displacement assembly includes a guide rod, a linear motor mounted on the guide rod, and a first and second travel switches for limiting the linear motor's range of motion. When the linear motor moves and triggers the first travel switch, the multiple test rods on the underside of the lifting plate reach directly above the stain box. When the linear motor moves and triggers the second travel switch, the multiple test rods on the underside of the lifting plate reach directly above the wash test box.

[0016] As a preferred technical solution of the testing device of the present invention: when the test rod is fully inserted into the stain chamber, the stain source liquid level in the stain chamber is higher than the test ring groove on the top side of the test rod. When the test rod is fully inserted into the diversion channel, the washing liquid level in the flow chamber is higher than the test ring groove on the top side of the test rod.

[0017] As a preferred technical solution of the testing device of the present invention: the upstream of the washing liquid supply pipe is connected to the washing liquid supply tank and is equipped with a supply pump, the supply pump supplies washing liquid toward the flow chamber, the downstream of the turbid liquid discharge pipe is connected to the waste liquid collection tank and is equipped with an external discharge pump, the external discharge pump draws out the oily liquid in the flow chamber.

[0018] The present invention provides a method for quickly testing the detergency of a detergent, comprising the following contents:

[0019] Step 1: The displacement component drives the lifter and the lifting plate to move, so that the multiple test rods on the lower side of the lifting plate accurately reach the top of the stain box.

[0020] Step 2: The lifter drives the lift plate to descend, so that the test rod is fully inserted into the corresponding stain cavity of the stain box, so that the stain source pre-stored in the stain cavity adheres to the test ring groove of the test rod.

[0021] Step 3: After the test ring groove of the test rod has been attached to the stain for a preset period of time, the lifter drives the lifting plate to rise, causing the test rod to be gradually pulled out of the stain chamber.

[0022] Step 4: After the test rod is fully pulled out, the distance probe of the stain box detects the height of the stain source liquid level in the corresponding stain chamber. If the detected liquid level is lower than the preset value, the liquid stain source is replenished into the stain chamber through the filling pipe to facilitate multiple repeated tests.

[0023] Step 5: The displacement assembly drives the lifter and the lifting plate to move again, so that the test rod carrying the stain reaches the top of the washing test box.

[0024] Step 6: The lifter drives the lifting plate to descend so that the test rod is fully inserted into the corresponding diversion channel in the washing test box.

[0025] Step seven: The washing liquid supply pipe continuously supplies washing liquid to the flow cavity of the washing test box. The washing liquid flows evenly into each diversion channel and is finally discharged from the turbid liquid discharge pipe. At the same time, the ultrasonic vibrator on the bottom plate of the diversion channel is started to enhance the efficiency of the reaction between the washing liquid and the stains on the test rod.

[0026] Step 8: After the washing liquid is supplied according to the preset washing time, the washing liquid supply pipe stops supplying, the lifter drives the lifting plate to rise, and drives the test rod to be pulled out of the diversion channel.

[0027] Step 9: Use testing instruments or manual methods to check the residual stains in different test ring grooves on each test rod to evaluate the detergent's cleaning effect on different stains and complete a single test process.

[0028] Compared with the existing technology, the beneficial effects of the present invention are:

[0029] 1. The device of the present invention uses multiple independent stain chambers in the stain box to pre-store different types of stains (such as oil stains, juice stains, mud stains, etc.), cooperates with multiple test rods to simultaneously attach stains, and combines with the diversion channel of the washing test box to achieve simultaneous washing under unified conditions. This solves the problems of low efficiency and large batch environmental deviation in traditional batch testing. It can simultaneously complete the comparison of the decontamination effect of multiple stains, significantly improving testing efficiency.

[0030] 2. This invention utilizes a displacement assembly (linear motor, travel switch) to precisely position the test rod between the stain box and the wash test box. A lifter automatically inserts and removes the test rod, while a cleaning unit scrapes away excess stains. This reduces manual operations (such as manual smearing and controlling wash conditions) throughout the process, minimizing deviations in results caused by human operational differences and improving test repeatability and data accuracy.

[0031] 3. In the present invention, the width of the diversion channels of the washing test box is consistent, ensuring the uniform flow state of the washing liquid in each channel, and the ultrasonic vibrator is started synchronously, which stably enhances the efficiency of the interaction between the washing liquid and the stains, simulates the mechanical washing effect, and solves the problem of difficult to stably control parameters such as washing liquid flow and mechanical force in traditional tests. It ensures the consistency of washing intensity under the same test conditions and improves the reliability of the reference results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure when the test rod is inserted into the stain box in the present invention.

[0033] Figure 2 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0034] Figure 3 for Figure 2 Schematic diagram of the structure of the stain box.

[0035] Figure 4 This is a schematic diagram of the results when the test rod of the present invention is matched with the washing test box.

[0036] Figure 5 Schematic diagram of the flow coordination of the washing liquid in the washing test box of the present invention.

[0037] Figure 6 Schematic diagram of the structure of the test rod in the present invention.

[0038] Among them: 1-stain box, 101-stain chamber, 102-slot, 103-cleaning part, 104-distance probe, 105-filling pipe; 2-lifting plate, 201-label slot; 3-test rod, 301-test ring groove, 302-smooth ring surface, 303-rough ring surface, 304-fixing part; 4-guide rod; 5-linear motor; 6-lifter, 601-lifting shaft; 7-first stroke switch; 8-second stroke switch; 9-washing test box, 901-flow chamber, 902-diverter plate, 903-diverter channel, 904-ultrasonic vibrator; 10-washing liquid supply pipe; 11-supply pump; 12-turbid liquid discharge pipe; 13-exhaust pump. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] Example 1: The present invention designs a rapid testing device for detergent detergency, such as Figure 1 、 Figure 4 The device mainly consists of a stain box 1, a washing test box 9, a displacement assembly, a lifter 6, a lifting plate 2, a test rod 3 and supporting pipeline components. It can achieve the simultaneous attachment of multiple stains, unified washing conditions and decontamination effect detection, greatly improving the test efficiency and accuracy. The specific structural configuration is as follows:

[0041] like Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 Stain box 1: Contains multiple independent stain chambers 101, each pre-stored with different types of liquid stain sources (such as oil, juice, mud, etc.), allowing for simultaneous testing and comparison of multiple stains. The top of each stain chamber 101 corresponds to a slot 102 on the top plate of the stain box 1. Inside slot 102 is a cleaning section 103 (a rubber ring with chamfered top and bottom edges) for scraping excess stains off the smooth annular surface 302 of the test rod 3. Each stain chamber 101 is connected to a filling pipe 105 at the bottom and a distance probe 104 at the top. The distance probe 104 detects the liquid level of the stain source. When the liquid level falls below a preset value, the filling pipe 105 automatically replenishes the stain source, ensuring continuity across multiple tests.

[0042] like Figure 1 、 Figure 5Washing test box 9: A flow chamber 901 is internally provided. Parallel diverter plates 902 separate the flow chamber 901 into multiple diverter channels 903 (each diverter channel 903 is of equal width, with the top of the diverter plate 902 flush with the top of the washing test box 9), ensuring consistent flow of detergent within each channel. An ultrasonic vibrator 904 is embedded in the bottom plate of each diverter channel 903. When activated, this device enhances the interaction between the detergent and the stain, simulating the effect of mechanical washing. The washing test box 9 is connected to a detergent supply pipe 10 (connected upstream to a detergent supply tank and supply pump 11) and a turbid liquid drain pipe 12 (connected downstream to a waste liquid collection tank and external pump 13), ensuring a continuous supply of detergent and the removal of waste liquid.

[0043] like Figure 1 、 Figure 4 The displacement assembly includes a guide rod 4, a linear motor 5, a first travel switch 7, and a second travel switch 8. The linear motor 5 moves along the guide rod 4. When the first travel switch 7 is triggered, the test rod 3 reaches directly above the stain box 1. When the second travel switch 8 is triggered, the test rod 3 reaches directly above the wash test box 9, achieving precise positioning.

[0044] like Figure 1 、 Figure 4 Lifter 6: Lifter 6 is connected to the lifting plate 2 via a lifting shaft 601, driving the lifting plate 2 up and down to insert and remove the test rods 3. Multiple test rods 3 are fixed to the bottom of the lifting plate 2, and label slots 201 are provided on the side (each label slot 201 is aligned with a test rod 3), which can be used to mark the stain type of the corresponding test rod 3 to avoid confusion.

[0045] like Figure 2 、 Figure 3 、 Figure 6 The test rod 3 has multiple test grooves 301 on its side (for stain attachment). The non-test groove area is a smooth surface 302 (facilitating cleaning of excess stains). The inner wall of the test grooves 301 is a roughened surface 303 (enhancing stain attachment stability). Before the test rod 3 is inserted into the stain chamber 101, the volume of the stain chamber above the stain source liquid level is V0. The volume of the test rod 3 from its bottom to the top of the test grooves 301 is V1. The volume of the test rod 3 when fully inserted into the stain chamber 101 is V2. Therefore, V2 >= V0 >= V1.

[0046] The test ring groove 301 features a decreasing inner diameter and increasing vertical width from bottom to top (the higher the ring groove, the deeper the horizontal groove and the wider the vertical opening), allowing simulation of stains of varying thickness and area. Furthermore, a fixing portion 304 (smaller than the inner diameter of the cleaning portion 103) is located at the top, securing it to the lifting plate 2 and ensuring that the test rod 3 is not obstructed by the cleaning portion 103 during vertical movement.

[0047] Example 2: The present invention designs a method for quickly testing the detergency of detergents. The method uses automated mechanical operation to achieve simultaneous attachment of multiple stains, uniform washing conditions, and detergency testing. The specific steps are as follows:

[0048] Step 1: Position the test rod directly above the stain box:

[0049] The linear motor 5 moves on the guide rod 4, driving the lifter 6 and the lifting plate 2 to move horizontally. The linear motor 5 moves along the guide rod 4 toward the first travel switch 7. When the linear motor 5 triggers the first travel switch 7, the multiple test rods 3 on the lower side of the lifting plate 2 are precisely aligned above the multiple stain chambers 101 of the stain box 1 to complete the positioning.

[0050] Step 2: Insert the test rod into the stain chamber and attach the stain:

[0051] The lifter 6 drives the lift plate 2 downward via the lift shaft 601, fully inserting each test rod 3 into its corresponding stain chamber 101. At this point, the liquid stain source (such as oil stains, juice stains, etc.) pre-stored in the stain chamber 101 adheres to each test ring groove 301 due to the roughened annular surface 303 on the inner wall of the test ring groove 301. Furthermore, the stain source liquid level in the stain chamber 101 is higher than the test ring groove 301 on the top side of the test rod 3.

[0052] Step 3: Pull out the test rod and clean up excess stains:

[0053] After the stain remains attached for a predetermined period of time (e.g., a few seconds), the lifter 6 slowly raises the lift plate 2, gradually withdrawing the test rod 3 from the stain chamber 101. During this process, the cleaning portion 103 (a rubber ring with chamfered edges) within the slot 102 on the top plate of the stain box 1 contacts the smooth annular surface 302 of the test rod 3, scraping away any excess stain adhering to the smooth annular surface 302, leaving only the target stain within the test annular groove 301 (to prevent any excess stain from interfering with subsequent washing tests).

[0054] Step 4: Detection and replenishment of stain source liquid level:

[0055] After the test rod 3 is fully withdrawn from the stain chamber 101, a distance probe 104 configured for each stain chamber 101 monitors the liquid level of the stain source within the chamber in real time. If the detected liquid level falls below a preset value (i.e., insufficient stain source), liquid stain source is replenished via a refill pipe 105 at the bottom of the stain chamber 101 to ensure continuity during subsequent repeated tests.

[0056] Step 5: Position the test rod directly above the washing test box:

[0057] The linear motor 5 drives the lifter 6 and the lifting plate 2 to move horizontally again, and the linear motor 5 moves along the guide rod 4 toward the second stroke switch 8. When the linear motor 5 triggers the second stroke switch 8, the multiple test rods 3 carrying stains accurately reach the top of the multiple diversion channels 903 of the washing test box 9, completing the positioning.

[0058] Step 6: Insert the test rod into the diversion channel:

[0059] Lifter 6 drives lift plate 2 down again, fully inserting each test rod 3 into its corresponding diverter channel 903 within the washing test box 9. (Diverter channels 903 have the same width, ensuring consistent washing conditions across all channels.) At this point, the detergent level within flow chamber 901 is higher than the test ring groove 301 on the top side of the test rod 3, ensuring that all test ring grooves 301 with attached stains are fully immersed in detergent.

[0060] Step 7: Washing liquid supply and ultrasonic-assisted washing:

[0061] Driven by the supply pump 11 , the washing liquid supply pipe 10 continuously supplies the detergent solution to the flow cavity 901 of the washing test box 9 .

[0062] After entering the flow chamber 901, the washing liquid flows evenly through the parallel distribution of diverter plates 902 into the various diverter channels 903, ultimately being discharged from the turbid liquid discharge pipe 12 (with the external pump 13 assisting in waste liquid removal). Simultaneously, the ultrasonic vibrator 904 on the bottom plate of each diverter channel 903 is activated synchronously, enhancing the contact efficiency between the washing liquid and the stains on the test rod 3 through vibration, simulating the effect of mechanical washing.

[0063] Step 8: Stop washing and pull out the test rod:

[0064] After the wash liquid is continuously supplied for a predetermined wash time (e.g., 2 minutes), the wash liquid supply pipe 10 stops supplying the liquid, and the external discharge pump 13 continues to operate until the waste liquid in the diversion channel 903 is substantially drained. Subsequently, the lifter 6 drives the lift plate 2 upward, completely withdrawing the test rod 3 from the diversion channel 903.

[0065] Step 9: Detection of residual stains and evaluation of decontamination effects:

[0066] The residual dirt in the different test ring grooves 301 on each test rod 3 is checked by using a detection instrument (such as a spectrum analyzer) or manual observation.

[0067] Since the inner diameter of the test ring groove 301 decreases from bottom to top and the vertical width increases (i.e., the horizontal groove depth of the upper ring groove is greater and the vertical opening is wider), the detergent's ability to remove stains with different attachment forms can be evaluated by comparing the residual amounts (such as residual area and concentration) of the ring grooves at different positions.

[0068] The above method is for a single test operation. To obtain accurate reference test data information, the test operation can be repeated multiple times in the above manner to obtain test results with reference value.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid testing device for detergent detergency, characterized by: The invention comprises a stain box (1) and a washing test box (9), wherein the stain box (1) is provided with a plurality of independent stain chambers (101), each stain chamber (101) is provided with a distance probe (104) for detecting the height of the stain storage, and the bottom of each stain chamber (101) is independently connected to a filling pipe (105) for injecting liquid stain; The washing test box (9) is provided with a flow chamber (901), wherein a plurality of diversion plates (902) are distributed in parallel in the flow chamber (901) to form a plurality of diversion channels (903), and an ultrasonic vibrator (904) is embedded in the bottom plate of each diversion channel (903); The washing test box (9) is also connected to a washing liquid supply pipe (10) and a turbid liquid discharge pipe (12) that are in communication with the flow chamber (901); A displacement assembly is disposed above the stain box (1) and the washing test box (9); the lower side of the displacement assembly is connected to a lifter (6); the lower end of the lifting shaft (601) of the lifter (6) is fixedly connected to a lifting plate (2); and the bottom side of the lifting plate (2) is fixedly connected to a plurality of test rods (3); The test rod (3) has a plurality of test ring grooves (301) on its ring side surface, the test rod (3) ring side surface other than the test ring grooves (301) is a smooth ring surface (302), and the inner wall of the test ring groove (301) is a rough ring surface (303).

2. A rapid detergent detergency testing device according to claim 1, characterized in that: The top plate of the stain box (1) is provided with a slot (102) facing the stain chamber (101), and a cleaning portion (103) in contact with the smooth annular surface (302) is provided inside the slot (102), wherein the cleaning portion (103) is a rubber ring, and chamfered structures are provided on the upper and lower edges of the cleaning portion (103); A fixing portion (304) is provided at the top end of the test rod (3), the width of the fixing portion (304) being smaller than the inner diameter of the cleaning portion (103), and the fixing portion (304) being fixedly connected to the bottom surface of the lifting plate (2).

3. The rapid detergent detergency testing device according to claim 1, characterized in that: The width dimensions of each diversion channel (903) are the same, and the top of the diversion plate (902) is flush with the top of the washing test box (9).

4. A rapid detergent detergency testing device according to claim 1, characterized in that: The lifting plate (2) is provided with a plurality of label slots (201) on the side surface, and each label slot (201) is independently aligned with a test rod (3).

5. The rapid detergent detergency testing device according to claim 1, characterized in that: The inner diameter of the test ring groove (301) of the test rod (3) decreases from bottom to top, and the vertical width of the test ring groove (301) of the test rod (3) increases from bottom to top.

6. A rapid detergent detergency testing device according to claim 1, characterized in that: The displacement assembly comprises a guide rod (4), a linear motor (5) arranged on the guide rod (4), a first travel switch (7) for limiting the moving range of the linear motor (5), and a second travel switch (8); When the linear motor (5) moves to trigger the first travel switch (7), the multiple test rods (3) on the lower side of the lifting plate (2) arrive right above the stain box (1); When the linear motor (5) moves to trigger the second travel switch (8), the multiple test rods (3) on the lower side of the lifting plate (2) reach directly above the washing test box (9).

7. A rapid detergent detergency testing device according to claim 1, characterized in that: When the test rod (3) is fully inserted into the stain chamber (101), the stain source liquid level in the stain chamber (101) is higher than the test ring groove (301) on the top side of the test rod (3); When the test rod (3) is fully inserted into the diversion channel (903), the level of the washing liquid in the flow chamber (901) is higher than the test ring groove (301) on the top side of the test rod (3).

8. The rapid detergent detergency testing device according to claim 1, characterized in that: The upstream of the washing liquid supply pipe (10) is connected to the washing liquid supply tank and is equipped with a supply pump (11), and the downstream of the turbid liquid discharge pipe (12) is connected to the waste liquid collection tank and is equipped with an external discharge pump (13).

9. The device and method for quickly testing the detergency of a detergent according to claim 1, characterized in that: S1. The displacement assembly drives the lifter (6) and the lifting plate (2) to move, so that the multiple test rods (3) on the lower side of the lifting plate (2) reach directly above the stain box (1); S2. The lifter (6) drives the lift plate (2) to descend, so that the test rod (3) is completely inserted into the corresponding stain chamber (101) of the stain box (1), so that the stain source pre-stored in the stain chamber (101) is attached to the test ring groove (301) of the test rod (3); S3. After the test ring groove of the test rod (3) has been attached to the stain for a predetermined period of time, the lifter (6) drives the lift plate (2) to rise, driving the test rod (3) to be gradually withdrawn from the stain chamber (101); S4. After the test rod (3) is completely withdrawn, the distance probe (104) of the stain box (1) detects the height of the stain source liquid level in the corresponding stain chamber (101). If the detected liquid level is lower than a preset value, the liquid stain source is replenished into the stain chamber (101) through the filling pipe (105); S5. The displacement assembly drives the lifter (6) and the lifting plate (2) to move again, so that the test rod (3) carrying the stain reaches just above the washing test box (9); S6. The lifter (6) drives the lift plate (2) to descend, so that the test rod (3) is completely inserted into the corresponding diversion channel (903) in the washing test box (9); S7. The washing liquid supply pipe (10) continuously supplies washing liquid to the flow chamber (901) of the washing test box (9), and the washing liquid flows evenly into each diversion channel (903) and is finally discharged from the turbid liquid discharge pipe (12). At the same time, the ultrasonic vibrator (904) on the bottom plate of the diversion channel (903) is started to enhance the efficiency of the washing liquid and the stains on the test rod (3); S8. After the washing liquid is supplied according to the preset washing time, the washing liquid supply pipe (10) stops supplying, and the lifter (6) drives the lifting plate (2) to rise, driving the test rod (3) to be drawn out from the diversion channel (903); S9. Check the residual condition of the stains in the different test ring grooves (301) on each test rod (3) by means of a detection instrument or manually, so as to evaluate the decontamination effect of the detergent on the different stains and complete a single test process.

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