Laundry detergent concentration detection method and device

Abstract

The invention relates to the technical field of laundry detergent detection. The invention aims to provide a laundry detergent concentration detection method and a laundry detergent concentration detection device. The method comprises the following steps: S1, on-line collection of a sample; s2, preparing a sample; s3, carrying out infrared absorbance detection; s4, calculating the concentration; and S5, repeating all the steps until all the laundry detergent samples are detected. The device comprises a detection box, wherein the detection box is composed of a bottom frame and a light shield arranged on the bottom frame; the sample loading hopper is mounted on the bottom frame and is in running fit with the bottom frame, and a carrier driving mechanism for driving the sample loading hopper to rotate is also arranged in the detection box. According to the method, the detection efficiency can be greatly improved, a large number of samples can be rapidly screened, unqualified products can be found in time, and inferior products are prevented from flowing into the market. The device is matched with the method, rapid sheet preparation of the laundry detergent sample is realized by utilizing centrifugal force, bubbles in the laundry detergent sample can be stripped during centrifugal rotation, and the detection accuracy is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laundry detergent detection, and particularly to a method and device for detecting the concentration of laundry detergent. Background Art

[0002] The content of surfactants (such as: AES sodium lauryl ether sulfate, AEO fatty alcohol polyoxyethylene ether, etc.) is the core index to measure the cleaning efficacy of laundry detergent. Its concentration is directly related to the efficacy of laundry detergent. Insufficient content results in weak detergency, while excessive content may lead to residues, irritate the skin and pollute the environment. By detecting the surfactants, it can ensure that the product meets the standards, meets the quality requirements, and guarantees the safety and experience of consumers. For laundry detergent processing enterprises, in order to ensure that the products produced meet the needs of downstream partners, customers, etc., it is necessary to conduct sampling inspections on each laundry detergent product. For large-scale processing enterprises, with the increase in the number of orders, even in the sampling method, the detection volume is very large.

[0003] Traditional detection methods rely on manual sampling and then use a refractometer to detect the surfactant concentration of the product. On the one hand, there are still the disadvantages of cumbersome operation and large workload. On the other hand, this detection method has low accuracy and increasingly cannot meet the actual detection needs. Although some methods (such as: liquid chromatography, gas chromatography, etc.) can relatively accurately detect the surfactant concentration, their detection often involves a complex sample preparation process, with low detection efficiency and extremely high equipment costs. Except for some professional detection institutions and laboratories, it is difficult to be truly popularized. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for detecting the concentration of laundry detergent that can reduce the detection time and labor costs and improve the detection efficiency.

[0005] To achieve the above invention purpose, the technical solution adopted by the present invention is: a method for detecting the concentration of laundry detergent, comprising the following steps:

[0006] S1. Online sample collection: Online extract the laundry detergent in the packaging container onto a sample carrier with a rotation function and a transparent detection area;

[0007] S2. Sample preparation: Through the rotation of the sample carrier, use centrifugal force to evenly disperse the laundry detergent sample on the sample carrier to the detection area of the sample carrier;

[0008] S3. Infrared absorbance detection: Use infrared spectroscopy to detect the laundry detergent sample in the detection area to obtain the infrared absorbance of the laundry detergent sample;

[0009] S4. Concentration calculation: Compare the detected infrared absorbance of the laundry detergent sample with the standard absorbance curve to obtain the surfactant concentration of the laundry detergent sample;

[0010] S5. Repeat the above steps S1 - S4 until all the laundry detergent samples are tested.

[0011] Preferably, between steps S4 and S5, there is also a step of sample evacuation: By rotating the sample carrier, the centrifugal force is used to separate the laundry detergent sample from the detection area of the sample carrier.

[0012] Preferably, after the sample evacuation step, there is also a step of carrier cleaning: Cleaning liquid is introduced onto the sample carrier. By rotating the sample carrier, the centrifugal force is used to disperse the cleaning liquid to the detection area of the sample carrier and rinse the residual laundry detergent sample in the detection area; after rinsing, the cleaning liquid is separated from the detection area of the sample carrier by centrifugal force.

[0013] Preferably, for the detection device applying the above detection method, the detection device includes a detection box and a sampling and rinsing mechanism. The sampling and rinsing mechanism can extract the laundry detergent sample in the packaging container into the sample loading hopper in the detection box and can introduce cleaning liquid into the sample loading hopper.

[0014] The detection box is composed of a chassis and a light-shielding cover arranged on the chassis; the sample loading hopper is installed on the chassis and forms a rotational fit with the chassis. A carrier driving mechanism for driving the rotation of the sample loading hopper is also arranged in the detection box; the sample loading hopper is composed of two layers of plate bodies inside and outside, and cylindrical liquid discharge areas, conical cylinder-shaped detection areas, and hollow disc-shaped feeding areas are respectively formed in the upper, middle, and lower sections. The plate body corresponding to the detection area is composed of light-transmitting glass; Infrared absorbance detection mechanisms are also arranged in the detection box on both sides of the detection area.

[0015] Preferably, a support tube is arranged on the top surface of the chassis, and the inner cavity of the support tube forms a channel for the action of the sampling and rinsing mechanism; a connecting neck is arranged at the bottom of the sample loading hopper. The connecting neck is installed on the bearing tray in the middle section of the support tube through a tapered bearing and forms a rotational fit with the support tube.

[0016] The carrier driving mechanism includes a toothed ring arranged on the outer peripheral surface of the connecting neck and a rotating motor installed on the chassis. A driving gear is arranged at the output end of the rotating motor, and the driving gear meshes with the toothed ring.

[0017] Preferably, the infrared absorbance detection mechanism includes an infrared sensor and an infrared light source. The infrared sensor is arranged outside the detection area through a mounting bracket, and the infrared light source is arranged on the inner surface of the top plate of the light-shielding cover; there is also a light homogenizing plate, and the light homogenizing plate covers the light-transmitting glass on the inner side of the detection area.

[0018] Preferably, the sampling and flushing mechanism includes a top frame arranged above the detection box. A vertical lead screw and a guide rod are arranged side by side between the top frame and the top of the detection box. The lead screw is driven by a lifting motor arranged on the top frame. An elevating frame is sleeved outside the lead screw and the guide rod. The elevating frame is respectively in threaded fit and sliding fit with the lead screw and the guide rod.

[0019] A sampling tube is arranged at the bottom of the elevating frame. The lower end of the sampling tube extends into the detection box and is arranged inside a support tube. A solid section is arranged at the lower end of the sampling tube, and the pipe orifice at the lower end of the sampling tube is located on the side above the solid section. An inhalation and drainage driving component is further arranged at the upper end of the sampling tube for forming inhalation and drainage of the laundry detergent sample by changing the pressure inside the sampling tube.

[0020] A cleaning tube is further sleeved outside the upper section of the sampling tube. The pipe orifice at the lower end of the cleaning tube is also located on the side of the cleaning tube. A connecting sleeve is sleeved outside the upper end of the cleaning tube and is communicated with a liquid inlet tube for supplying cleaning liquid through the connecting sleeve.

[0021] Preferably, the inhalation and drainage driving component is an electric sampling piston arranged on the elevating frame and communicated with the sampling tube.

[0022] Preferably, an extension sleeve for sleeving outside the cleaning tube is arranged on the plate body corresponding to the inner side of the sample loading hopper feeding area, and a lining bearing bush is arranged inside the extension sleeve.

[0023] Preferably, a liquid collecting groove is arranged on the inner surface of the side wall of the light-shielding cover. The position of the liquid collecting groove is opposite to the liquid drainage area of the sample loading hopper. The liquid collecting groove is communicated with a waste liquid tank through a pipeline and a drainage pump. A drainage hole communicated with the liquid collecting groove is arranged on the outer plate body of the liquid drainage area. A plugging ring is further inserted into the liquid drainage area of the sample loading hopper. A permanent magnet ring is arranged at the top of the plugging ring. An electromagnetic ring is arranged on the inner surface of the top plate of the light-shielding cover. The permanent magnet ring can drive the plugging ring to move up and down under the drive of the electromagnetic ring, so as to open and close the drainage hole.

[0024] Preferably, a limiting part for preventing the plugging ring from coming out of the liquid drainage area is further arranged at the plugging ring.

[0025] The beneficial effects of the present invention are mainly reflected in:

[0026] 1. It can realize online automatic extraction of the laundry detergent sample, and is especially suitable for application during mass detection on a production line.

[0027] 2. The concentration of surfactants in the laundry detergent sample is detected by infrared spectroscopy. While ensuring the detection efficiency, the detection accuracy is greatly improved.

[0028] 3. By rotating the sample carrier, the rapid preparation of the laundry detergent sample is achieved by using centrifugal force, and while centrifugally rotating, the bubbles in the laundry detergent sample can be peeled off, further improving the accuracy of detection.

[0029] The present invention can greatly improve the detection efficiency, quickly screen a large number of samples, timely discover unqualified products, and prevent inferior products from flowing into the market; it can also reduce the detection cost, reduce the consumption of manpower and time, meet the needs of large-scale production and market supervision, provide strong support for enterprise production control and market quality supervision, and ensure the stability of laundry detergent products in terms of quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a flowchart of each step of the present invention;

[0031] Figure 2 is an application schematic diagram of the detection device of the present invention;

[0032] Figure 3 is a structural schematic diagram of the detection device of the present invention;

[0033] Figure 4 is Figure 3 an enlarged view of part A in

[0034] Figure 5 is a structural schematic diagram of the sampling tube and the cleaning tube;

[0035] 0. Packaging container; 1. Detection box; 2. Sampling and rinsing mechanism; 3. Sample loading hopper; 4. Bottom frame; 5. Light-shielding cover; 6. Plate body; 7. Drainage area; 8. Detection area; 9. Feeding area; 10. Transparent glass; 11. Support tube; 12. Connecting neck; 13. Taper bearing; 14. Supporting tray; 15. Gear ring; 16. Rotating motor; 17. Driving gear; 18. Infrared sensor; 19. Infrared light source; 20. Mounting frame; 21. Light homogenizing plate; 22. Top frame; 23. Lead screw; 24. Guide rod; 25. Lifting motor; 26. Lifting frame; 27. Sampling tube; 28. Solid section; 29. Cleaning tube; 30. Connecting sleeve; 31. Liquid inlet pipe; 32. Electric sampling piston; 33. Extension sleeve; 34. Inner lining bearing; 35. Liquid collecting tank; 36. Pipeline; 37. Drainage pump; 38. Waste liquid tank; 39. Drainage hole; 40. Sealing ring; 41. Permanent magnet ring; 42. Electromagnetic ring. DETAILED DESCRIPTION OF THE INVENTION

[0036] As Figure 1As shown, the present invention discloses a method for detecting the concentration of laundry detergent, which can greatly improve the detection efficiency, quickly screen a large number of samples, timely detect unqualified products, and prevent inferior products from entering the market. It can also reduce the detection cost, save manpower and time, meet the needs of large-scale production and market supervision, provide strong support for enterprise production control and market quality supervision, and ensure the stability of laundry detergent products in terms of quality and safety.

[0037] The overall detection method includes the following steps:

[0038] S1. Online sample collection: The laundry detergent in the packaging container 0 is drawn online (conveyor line) onto the sample carrier with a rotary function and a transparent detection area 8. The detection area 8 thereon forms a narrow space in the shape of a conical cylinder, and the structure of the sample carrier can be like the Figure 3 and 4 sample loading hopper 3 shown, and of course, it can also be other structures with the same function.

[0039] S2. Sample preparation: By rotating the sample carrier, the centrifugal force is used to evenly disperse the laundry detergent sample on the sample carrier into the detection area 8 of the sample carrier. Under the action of the centrifugal force, the laundry detergent sample is forced into the detection area 8, and the sample sheet is pressed in the detection area 8. At the same time, under the stratification action of the centrifugal force, the laundry detergent sample fills the detection area 8, and the bubbles in the laundry detergent sample move inwards, and the bubble separation is completed synchronously.

[0040] S3. Infrared absorbance detection: The infrared spectrum method is used to detect the laundry detergent sample in the detection area 8 to obtain the infrared absorbance of the laundry detergent sample.

[0041] S4. Concentration calculation: The infrared absorbance of the detected laundry detergent sample is compared with the standard absorbance curve to obtain the surfactant concentration of the laundry detergent sample. The standard absorbance curve can be obtained by pre-configuring standard solutions with known concentrations and plotting the infrared absorbance spectra of each standard solution.

[0042] After a sample is detected, the detected laundry detergent sample should be separated and discharged from the sample carrier in a timely manner. After a sample is detected, it is preferably to have the following steps:

[0043] Sample evacuation: By rotating the sample carrier, the centrifugal force is used to separate the laundry detergent sample from the detection area 8 of the sample carrier.

[0044] Carrier cleaning: Cleaning liquid is introduced onto the sample carrier. By rotating the sample carrier, the centrifugal force is used to disperse the cleaning liquid into the detection area 8 of the sample carrier and wash the residual laundry detergent sample in the detection area 8. After the washing is completed, the centrifugal force is used to separate the cleaning liquid from the detection area 8 of the sample carrier.

[0045] S5. Repeat all the above steps until all the laundry detergent samples are tested.

[0046] Its overall flowchart is as Figure 1 shown.

[0047] Through the above method, the present invention can realize the online automatic extraction of laundry detergent samples, especially suitable for applications during large-scale detection on the production line. At the same time, the concentration of surfactants in the laundry detergent samples is detected by infrared spectroscopy, which greatly improves the detection accuracy while ensuring the detection efficiency. In addition, through the rotation of the sample carrier, the rapid preparation of the laundry detergent samples is achieved by using centrifugal force, and the bubbles in the laundry detergent samples can be stripped while centrifugally rotating, further improving the detection accuracy. In addition, the present invention also utilizes the sample carrier with a rotation function to assist in the discharge of the tested samples and the cleaning liquid through centrifugal force, enabling the sample carrier to have the characteristics of: sample preparation, sample cleaning, and automatic flushing.

[0048] In order to adapt to this detection method, as shown in Figures 2 - 5 , the present invention particularly discloses a detection device, which includes a detection box 1 and a sampling and flushing mechanism 2. The sampling and flushing mechanism 2 can extract the laundry detergent sample in the packaging container 0 into the sample loading hopper 3 (i.e., the sample carrier) in the detection box 1, and can introduce the cleaning liquid into the sample loading hopper 3.

[0049] As shown in Figure 3 , the detection box 1 of the present invention is composed of a bottom frame 4 and a light-shielding cover 5 arranged on the bottom frame 4. The sample loading hopper 3 is installed on the bottom frame 4 and forms a rotational fit with the bottom frame 4. A carrier driving mechanism for driving the rotation of the sample loading hopper 3 is also arranged in the detection box 1.

[0050] In order to improve the installation stability of the sample loading hopper 3 and reserve a fitting path for the cooperation between the sample loading hopper 3 and the sampling and flushing mechanism 2. The installation form of the sample loading hopper 3 of the present invention can be as follows: as shown in Figure 4 , a support tube 11 is arranged on the top surface of the bottom frame 4, and the inner cavity of the support tube 11 forms a channel for the action of the sampling and flushing mechanism 2. A connecting neck 12 is arranged at the bottom of the sample loading hopper 3, and the connecting neck 12 is installed on the bearing tray 14 in the middle section of the support tube 11 through a tapered bearing 13 and forms a rotational fit with the support tube 11.

[0051] The selectable carrier driving mechanism thereof includes a gear ring 15 arranged on the outer peripheral surface of the connecting neck 12, and a rotating motor 16 installed on the bottom frame 4. A driving gear 17 is arranged at the output end of the rotating motor 16, and the driving gear 17 meshes with the gear ring 15. It can be foreseen that it is feasible to use a synchronous pulley and synchronous belt combination as the transmission component of the carrier driving mechanism or other carrier driving mechanisms that play a similar role.

[0052] In order to give full play to the characteristics of sample carrier drum 3 for rotary sheet production, as Figure 4 shown in, the sample carrier drum 3 of the present invention is composed of two layers of inner and outer plates 6, and cylindrical liquid drainage areas 7, conical cylinder-shaped detection areas 8, and hollow disk-shaped feeding areas 9 are respectively formed in the upper section, middle section, and lower section. The plate 6 corresponding to the detection area 8 is composed of light-transmitting glass 10. Infrared absorbance detection mechanisms are also arranged in the detection boxes 1 on both sides of the detection area 8.

[0053] Under the suction of the sampling and rinsing mechanism 2, the laundry detergent sample enters the feeding area 9 of the sample carrier drum 3. Under the high-speed rotation of the sample carrier drum 3, the laundry detergent sample is thrown out from the feeding area 9 and enters the detection area 8 along the gap between the plates 6 (at the detection area 8). The infrared absorbance detection mechanism obtains its infrared absorbance by detecting the infrared absorbance of the sample in the detection area 8, and calculates the concentration of the surfactant in it in combination with the standard absorbance curve. Generally, the calculation process is processed by the control processor supporting this device, and the concentration data is presented locally through the display screen or remotely presented by uploading to the total control system.

[0054] Regarding the layout of the infrared absorbance detection mechanism, it can be as Figure 4 shown in. The infrared absorbance detection mechanism includes infrared sensors 18 and infrared light sources 19, and multiple groups can be set. Data correction and error revision are achieved among multiple groups, such as: taking the average value, taking the median value, etc. There are many specific processing methods, which will not be elaborated one by one in the present invention. The infrared sensors 18 are arranged on the outer side of the detection area 8 through mounting brackets 20, and the infrared light sources 19 are arranged on the inner surface of the top plate of the light-shielding cover 5. A light homogenizing plate 21 is also included. The light homogenizing plate 21 covers the outside of the light-transmitting glass 10 on the inner side of the detection area 8. Through the light homogenizing plate 21, the infrared light source 19 can irradiate the detection area 8 more evenly, maintaining the stability and consistency of the infrared illuminance at each position in the detection area 8.

[0055] On the one hand, the sampling and rinsing mechanism 2 of the present invention is used to pump the sample in the packaging container 0 to the sample carrier drum 3, and on the other hand, it is used to add the cleaning liquid to the sample carrier drum 3. Its structure can be as Figure 4 shown in, including a top frame 22 arranged above the detection box 1. A vertical lead screw 23 and a guide rod 24 are arranged side by side between the top frame 22 and the top of the detection box 1. The lead screw 23 is driven by a lifting motor 25 arranged on the top frame 22. A lifting frame 26 is sleeved outside the lead screw 23 and the guide rod 24. The lifting frame 26 forms a threaded fit and a sliding fit with the lead screw 23 and the guide rod 24 respectively. Through the lead screw 23 and the guide rod 24, the present invention can drive the lifting frame 26 to move up and down, and then drive the sampling tube 27, cleaning tube 29, etc. installed thereon to move up and down.

[0056] A sampling tube 27 is provided at the bottom of the lifting frame 26. The lower end of the sampling tube 27 extends into the detection box 1 and is arranged inside the support tube 11. A solid section 28 is provided at the lower end of the sampling tube 27, and the pipe orifice at the lower end of the sampling tube 27 is located on the side above the solid section 28. That is to say, during sampling in the present invention, the sampling tube 27 first moves downward driven by the lifting frame 26 and extends into the packaging container 0. After sucking a certain amount of sample liquid, it retracts and rises into the feeding area 9 of the sample-carrying hopper 3, and discharges the sample liquid through the pipe orifice located on the side, so as to be evenly distributed in the feeding area 9 to cooperate with subsequent centrifugation. The solid section 28 enables the sampling tube 27 to always form a seal for the feeding area 9, preventing the sample liquid from flowing out of the support tube 11. Compared with the sampling method of directly arranging the pipe orifice at the lower end of the sampling tube 27, its structure is delicate and reasonable.

[0057] For sucking the sample liquid, a suction and discharge drive assembly is further provided at the upper end of the sampling tube 27 of the present invention for forming suction and discharge of the laundry detergent sample by changing the pressure inside the sampling tube 27. For example: the suction and discharge drive assembly is an electric sampling piston 32 provided on the lifting frame 26 and communicated with the sampling tube 27. By the telescopic movement of the piston rod of the electric sampling piston 32, the pressure inside the sampling tube 27 communicated therewith is changed, so as to realize the extraction and discharge of the sample liquid in a section at the end of the sampling tube 27.

[0058] Since the sample-carrying hopper 3 is a rotating part, in order to meet the need for the cleaning liquid to enter the feeding area 9, as shown in Figure 4 and 5 A cleaning tube 29 is sleeved outside the upper section of the sampling tube 27, and the pipe orifice at the lower end of the cleaning tube 29 is also located on the side of the cleaning tube 29. A connecting sleeve 30 is sleeved outside the upper end of the cleaning tube 29 and is communicated with a liquid inlet tube 31 for supplying the cleaning liquid through the connecting sleeve 30. In this way, during the cleaning liquid inlet operation, by the lifting of the lifting frame 26, the pipe orifice at the lower end of the cleaning tube 29 can be located in the feeding area 9, so as to realize the cleaning liquid inlet. Of course, it is also feasible to directly use the sampling tube 27 as the cleaning tube 29 synchronously. In this case, generally an electrically controlled valve that can be opened and closed needs to be provided on the liquid inlet tube 31 to control the on-off of the liquid inlet tube 31.

[0059] On this basis, in order to further improve the stability of the rotary motion of the sample-carrying hopper 3, a better solution can also be that a lengthening sleeve 33 for sleeving outside the cleaning tube 29 is provided on the plate body 6 corresponding to the inner side of the feeding area 9 of the sample-carrying hopper 3, and a lining bearing 34 is arranged inside the lengthening sleeve 33.

[0060] Regarding the discharge of the detected sample liquid and the cleaning liquid of the present invention, the following structure can be adopted, as shown in Figure 4As shown in the figure, a liquid collecting groove 35 is provided on the inner surface of the side wall of the light-shielding cover 5. The position of the liquid collecting groove 35 is opposite to the liquid discharging area 7 of the sample loading hopper 3. The liquid collecting groove 35 is communicated with a waste liquid tank 38 through a pipeline 36 and a liquid discharging pump 37. A liquid discharging hole 39 communicated with the liquid collecting groove 35 is provided on the outer plate body 6 of the liquid discharging area 7. A plugging ring 40 is also inserted in the liquid discharging area 7 of the sample loading hopper 3. A permanent magnetic ring 41 is provided at the top of the plugging ring 40, and an electromagnetic ring 42 is provided on the inner surface of the top plate of the light-shielding cover 5. The permanent magnetic ring 41 can drive the plugging ring 40 to move up and down under the drive of the electromagnetic ring 42, so as to open and close the liquid discharging hole 39. Since the plugging ring 40 is provided, in order to prevent the plugging ring 40 from being disengaged from the liquid discharging area 7, a limiting member 43 is also provided at the position of the plugging ring 40. There are many structures of the limiting member 43. For example, a limiting block is provided on the plugging ring 40, and the limiting block extends into the liquid discharging hole 39. It can move in the height direction of the liquid discharging hole 39, but can prevent the plugging ring 40 from being disengaged. Of course, on the premise of meeting the anti-disengagement requirement, it is also feasible to use a limiting member 43 with other structures.

Claims

1. A method for detecting the concentration of laundry detergent, characterized in that, It includes the following steps: S1. Online sample collection: The laundry detergent in the packaging container (0) is drawn online onto a sample carrier with a rotating function and a transparent detection area (8); S2. Sample preparation: Through the rotation of the sample carrier, the laundry detergent sample on the sample carrier is evenly dispersed into the detection area (8) of the sample carrier by centrifugal force; S3. Infrared absorbance detection: The laundry detergent sample in the detection area (8) is detected by infrared spectroscopy to obtain the infrared absorbance of the laundry detergent sample; S4. Concentration calculation: The infrared absorbance of the detected laundry detergent sample is compared with the standard absorbance curve to obtain the surfactant concentration of the laundry detergent sample; S5. Repeat the aforementioned steps S1 - S4 until all the laundry detergent samples are detected.

2. The method for detecting the concentration of laundry detergent according to claim 1, wherein: Between steps S4 and S5, there is also a step of sample evacuation: Through the rotation of the sample carrier, the laundry detergent sample is separated from the detection area (8) of the sample carrier by centrifugal force.

3. The laundry detergent concentration detection method according to claim 2, wherein: After the sample evacuation step, there is also a step of carrier cleaning: Cleaning liquid is introduced onto the sample carrier. Through the rotation of the sample carrier, the cleaning liquid is dispersed into the detection area (8) of the sample carrier by centrifugal force, and the residual laundry detergent sample in the detection area (8) is rinsed; After the rinsing is completed, the cleaning liquid is separated from the detection area (8) of the sample carrier by centrifugal force.

4. A detection device using the detection method according to any one of claims 1-3, characterized in that: The detection device includes a detection box (1) and a sampling and rinsing mechanism (2). The sampling and rinsing mechanism (2) can draw the laundry detergent sample in the packaging container (0) into the sample loading hopper (3) in the detection box (1), and can introduce cleaning liquid into the sample loading hopper (3); The detection box (1) is composed of a bottom frame (4) and a light-shielding cover (5) arranged on the bottom frame (4); The sample loading hopper (3) is installed on the bottom frame (4) and forms a rotational fit with the bottom frame (4). A carrier driving mechanism for driving the rotation of the sample loading hopper (3) is also provided in the detection box (1); The sample loading hopper (3) is composed of two layers of inner and outer plates (6), and cylindrical liquid discharge areas (7), conical cylindrical detection areas (8), and hollow disc-shaped feeding areas (9) are respectively formed in the upper, middle, and lower sections. The plate (6) corresponding to the detection area (8) is composed of a light-transmitting glass (10); Infrared absorbance detection mechanisms are also provided in the detection box (1) on both sides of the detection area (8).

5. The detection device according to claim 4, characterized in that: A support tube (11) is provided on the top surface of the bottom frame (4). The inner cavity of the support tube (11) forms a channel for the operation of the sampling and rinsing mechanism (2); A connecting neck (12) is provided at the bottom of the sample loading hopper (3). The connecting neck (12) is installed on the bearing tray (14) in the middle section of the support tube (11) through a tapered bearing (13) and forms a rotational fit with the support tube (11); The carrier driving mechanism includes a gear ring (15) provided on the outer peripheral surface of the connecting neck (12), and a rotating motor (16) installed on the bottom frame (4). A driving gear (17) is provided at the output end of the rotating motor (16), and the driving gear (17) meshes with the gear ring (15).

6. The detection device according to claim 5, characterized in that: The infrared absorbance detection mechanism includes an infrared sensor (18) and an infrared light source (19). The infrared sensor (18) is arranged outside the detection area (8) through a mounting bracket (20), and the infrared light source (19) is arranged on the inner surface of the top plate of the light-shielding cover (5). It also includes a light homogenizing plate (21), and the light homogenizing plate (21) covers the outside of the light-transmitting glass (10) inside the detection area (8).

7. The detection device according to claim 6, wherein: The sampling and flushing mechanism (2) includes a top bracket (22) arranged above the detection box (1). A vertical lead screw (23) and a guide rod (24) are arranged side by side between the top bracket (22) and the top of the detection box (1). The lead screw (23) is driven by a lifting motor (25) arranged on the top bracket (22). A lifting frame (26) is sleeved outside the lead screw (23) and the guide rod (24), and the lifting frame (26) forms a threaded fit and a sliding fit with the lead screw (23) and the guide rod (24) respectively; A sampling tube (27) is arranged at the bottom of the lifting frame (26). The lower end of the sampling tube (27) extends into the detection box (1) and is arranged inside the support tube (11). A solid section (28) is arranged at the lower end of the sampling tube (27), and the pipe orifice at the lower end of the sampling tube (27) is located on the side above the solid section (28). A suction and discharge driving assembly is also arranged at the upper end of the sampling tube (27) for sucking and discharging the laundry detergent sample by changing the pressure inside the sampling tube (27); A cleaning tube (29) is sleeved outside the upper section of the sampling tube (27), and the pipe orifice at the lower end of the cleaning tube (29) is also located on the side of the cleaning tube (29). A connecting sleeve (30) is sleeved outside the upper end of the cleaning tube (29), and the cleaning tube (29) is communicated with a liquid inlet pipe (31) for supplying cleaning liquid through the connecting sleeve (30).

8. The detection device according to claim 7, wherein: The suction and discharge driving assembly is an electric sampling piston (32) arranged on the lifting frame (26) and communicated with the sampling tube (27).

9. The detection device according to claim 8, characterized in that: An extension sleeve (33) for sleeving outside the cleaning tube (29) is arranged on the plate body (6) corresponding to the inner side of the feeding area (9) of the sample loading hopper (3). A lining bearing bush (34) is arranged inside the extension sleeve (33).

10. The detection device according to claim 9, wherein: A liquid collecting groove (35) is arranged on the inner surface of the side wall of the light-shielding cover (5). The position of the liquid collecting groove (35) is opposite to the liquid discharge area (7) of the sample loading hopper (3). The liquid collecting groove (35) is communicated with a waste liquid tank (38) through a pipeline (36) and a liquid discharge pump (37). A liquid discharge hole (39) communicated with the liquid collecting groove (35) is arranged on the outer plate body (6) of the liquid discharge area (7). A sealing ring (40) is inserted into the liquid discharge area (7) of the sample loading hopper (3). A permanent magnet ring (41) is arranged at the top of the sealing ring (40), and an electromagnetic ring (42) is arranged on the inner surface of the top plate of the light-shielding cover (5). The permanent magnet ring (41) can drive the sealing ring (40) to move up and down under the drive of the electromagnetic ring (42) to open and close the liquid discharge hole (39).

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