Automatic cleaning method and cleaning device for digestion cup of permanganate index analyzer

Abstract

The invention discloses an automatic cleaning method and an automatic cleaning device for a digestion cup of a permanganate index analyzer. According to the automatic cleaning method, the cleanliness of the digestion cup can be judged, and compared with a human eye judgment mode, the cleaning effect of the digestion cup can be quantified, and the cleaning cleanliness is improved; the automatic cleaning device is used for cleaning the digestion cup according to an automatic cleaning method, and can judge the demand quantity of cleaning liquid according to the judgment result of the cleanliness, so that the waste of the cleaning liquid is avoided, and meanwhile, the discharge quantity of waste liquid is reduced; in addition, the automatic cleaning device can automatically classify the waste liquid generated by cleaning the digestion cup according to the property of the waste liquid, so that the waste liquid enters different liquid storage mechanisms, the liquid waste treatment cost is reduced, meanwhile, secondary pollution can be avoided, and the device is environment-friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of cup cleaning, and in particular relates to an automatic cleaning method and a cleaning device for a digestion cup of a permanganate index analyzer. Background Art

[0002] The permanganate index can reflect the degree of pollution of organic and inorganic oxidizable substances in water bodies and can be used as an indicator to measure the content of organic matter in water. According to the requirements of the "Sanitary Standard for Drinking Water" (GB5749-2022) and the "Standard for Drinking Water Quality" (CJ 94-2005), the permanganate index has become a routine monitoring indicator, which has increased the number of sample tests in laboratories at all levels. As a result, problems such as the large number of glassware used in the testing process, the large workload of cleaning the utensils, and the large amount of waste liquid generated have emerged.

[0003] At present, most permanganate index digestion cups are cleaned manually by staff, but this method uses a large amount of cleaning liquid, produces a lot of waste liquid, and requires human eyes to judge the cleanliness of the cleaning. This judgment method has errors. If the vessel is not cleaned thoroughly, it will affect the accuracy of the test data. The invention patent with application publication number CN 110947689 A discloses a cup cleaning device and a cup cleaning system, which can replace manual cleaning of the cup body, but the cleaning device and system are also unable to judge the cleanliness of the vessel. Summary of the invention

[0004] To solve the above problems, in a first aspect, the present invention provides an automatic cleaning method for a digestion cup of a permanganate index analyzer, which can automatically determine the cleanliness of the digestion cup during cleaning and improve the cleaning effect.

[0005] The technical solution of the present invention to solve the above problems is as follows: An automatic cleaning method for a permanganate index analyzer digestion cup comprises the following steps: Send out detection light to make the light penetrate the digestion cup to be detected; The detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value; when the judgment value is 1, an instruction to spray cleaning liquid and return the detection is sent to the first execution end; when the judgment value is 2, an instruction to spray water and drain the water is sent to the first execution end.

[0006] Preferably, when the judgment value is 2, an instruction to spray water and drain the water is sent to the first execution end; and the following procedures are executed in sequence: continue to emit detection light to allow the light to penetrate the digestion cup to be detected; convert the incident light penetrating the digestion cup into an RGB color signal, and output the corresponding analog voltage value; compare the analog voltage value with the preset voltage value, and output the judgment value; when the judgment value is 3, the text or graphic result indicating that the cup is qualified is displayed on the display; when the judgment value is 4, the text or graphic result indicating that the cup is abnormal is displayed on the display.

[0007] Preferably, the detection light is white light.

[0008] Preferably, before emitting the detection light, the method further includes sending an instruction to pour the sample to the second execution end.

[0009] Preferably, the second execution end is a clamping terminal with a rotation function.

[0010] Preferably, the preset voltage value is obtained by detecting a clean digestion cup.

[0011] In this solution, the preset voltage value V0 is 6100mV, the judgment value is the ratio of the analog voltage Vc to V0, the judgment value 1 is greater than 1.31, the judgment value 2 is 1.14~1.31, the judgment value 3 is 1.0~1.02, and the judgment value 4 is greater than 1.02.

[0012] In a second aspect, the present invention further provides an automatic cleaning device for a digestion cup of a permanganate index analyzer, comprising: A light emitting body, used to emit the above-mentioned detection light and make the detection light penetrate the digestion cup to be detected; The sensor is used to receive the detection light penetrating the digestion cup, convert the detection light into RGB color signals, and output corresponding analog voltage values; The processor compares the analog voltage value with the preset voltage value to obtain a judgment value; when the judgment value is 1, an instruction to spray cleaning liquid and return the detection is sent to the first execution end; when the judgment value is 2, an instruction to spray water and control the moisture is sent to the first execution end; when the judgment value is 3, a result indicating that the digestion cup is qualified is sent to the display; when the judgment value is 4, a result indicating that the digestion cup is abnormal is sent to the display.

[0013] Preferably, the sensor is an RGB color perspective sensor. The RGB color perspective sensor converts incident light into R, G and B photocurrents with a photodiode array with a filter, which are then amplified and converted into analog voltages. Since all three outputs increase linearly with increasing light density, the sensor can measure the color and total density of light simultaneously.

[0014] Preferably, the cleaning device further comprises a clamping terminal with a rotation function, the clamping terminal comprises a cup holder and a rotatable support rod for mounting the cup holder, and the light emitter and the sensor are arranged on the support rod.

[0015] Preferably, the first execution end is a rinse component disposed in the cleaning tank below the cup holder, and the rinse component is connected to a liquid storage unit for storing cleaning liquid and waste liquid through an infusion unit.

[0016] Preferably, the rinsing component includes a main flushing port arranged in the center and a plurality of liquid outlets arranged around the main flushing port.

[0017] Preferably, the number of the liquid outlets is not less than 36. The liquid outlet can automatically adjust the spray direction according to the digestion cups with different outer diameters, directly reaching the annular inner wall at the bottom of the digestion cup, ensuring that the inside of the digestion cup can be in contact with the cleaning liquid, ensuring that the digestion cup is cleaned by the cleaning liquid 360° without dead corners.

[0018] Preferably, the liquid storage unit includes a first liquid storage mechanism for storing water and cleaning liquid, a second liquid storage mechanism and a third liquid storage mechanism for collecting waste liquid; the infusion unit includes a liquid inlet module for connecting the first liquid storage mechanism and the elution component, a first liquid outlet channel for connecting the second liquid storage mechanism and the cleaning tank, and a second liquid outlet channel for connecting the third liquid storage mechanism and the cleaning tank.

[0019] Preferably, the first liquid storage mechanism comprises a plurality of independent partitions, and the plurality of partitions are connected to the elution component via a plurality of independent liquid inlet channels in the liquid inlet module.

[0020] Preferably, the first liquid storage mechanism includes a first area for storing water, and a second area and a third area for storing cleaning liquid, which are independent of each other; the liquid inlet module also includes a multi-way valve connecting the rinsing component and the first area, the second area, and the third area through multiple independent liquid inlet channels.

[0021] The liquid inlet module is an automatic switching module, which can allow different liquids (water, cleaning liquid A, cleaning liquid B) in the first liquid storage mechanism to enter the elution component according to the cleanliness judgment result to clean the digestion cup. The cleaning liquid can be chromic acid cleaning liquid, oxalic acid cleaning liquid, etc. The liquid inlet module includes a multi-way valve, the common port of the multi-way valve is connected to the elution component, and the branch ports are respectively connected to the liquid inlet channels.

[0022] Preferably, the multi-way valve has 3 to 6 channel valve heads, and the flow path diameter is 2 to 4 mm.

[0023] The second liquid storage mechanism can be used to collect the dumped samples and the waste liquid after rinsing with the cleaning liquid; the third liquid storage mechanism can be used to collect the waste liquid after water rinsing. This setting method can automatically classify the waste liquid, reduce the cost of liquid waste disposal, and avoid secondary pollution.

[0024] The present invention has the following beneficial effects: 1) The automatic cleaning method of the digestion cup of the permanganate index analyzer of the present invention can judge the cleanliness of the digestion cup. Compared with the judgment method of the human eye, it can quantify the cleaning effect of the digestion cup and improve the cleanliness of the cleaning; 2) The automatic cleaning device of the digestion cup of the permanganate index analyzer of the present invention can judge the required amount of cleaning liquid according to the judgment result of cleanliness, thereby avoiding the waste of cleaning liquid and reducing the discharge amount of waste liquid; 3) The automatic cleaning device can automatically classify the waste liquid generated by cleaning the digestion cup according to the properties of the waste liquid, so that the waste liquid enters different liquid storage mechanisms, reducing the cost of liquid waste disposal, while avoiding secondary pollution and being environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of the automatic cleaning method of the digestion cup of the permanganate index analyzer of the present invention; Figure 2 It is a structural schematic diagram of the automatic cleaning device of the digestion cup of the permanganate index analyzer of the present invention; Figure 3 It is a schematic diagram of the installation method of the luminous body and the sensor in the automatic cleaning device of the digestion cup of the permanganate index analyzer of the present invention; Figure 4 It is a structural schematic diagram of a liquid inlet module in an automatic cleaning device for a digestion cup of a permanganate index analyzer of the present invention; In the figure: 11-cup holder, 12-support rod, 13-illuminant, 14-sensor, 15-cleaning tank, 16-rinsing component, 21-first liquid storage mechanism, 211-first zone, 212-second zone, 213-third zone, 22-second liquid storage mechanism, 23-third liquid storage mechanism, 31-liquid inlet module, 311-multi-way valve, 312-flow pump, 313-first liquid inlet channel, 314-second liquid inlet channel, 315-third liquid inlet channel, 32-first liquid outlet channel, 33-second liquid outlet channel. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present invention more clear, the present invention is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] An automatic cleaning method for a permanganate index analyzer digestion cup comprises the following steps: Send an instruction to dump the sample to the second execution end, and the light emitter 13 emits a detection light to make the light penetrate the digestion cup to be detected; convert the detection light penetrating the digestion cup into an RGB color signal, and output the corresponding analog voltage value; compare the analog voltage value with the preset voltage value to obtain a judgment value; when it is a judgment value 1 (greater than 1.31), send an instruction to the first execution end (rinsing component 16) to spray the cleaning liquid and return the detection; when it is a judgment value 2 (1.14~1.31), send a spray to the first execution end. The water spraying and water control instructions are executed, and the following procedures are executed in sequence: continue to emit detection light to make the light penetrate the digestion cup to be detected; convert the incident light penetrating the digestion cup into RGB color signal, and output the corresponding analog voltage value; compare the analog voltage value with the preset voltage value, and output the judgment value; when it is the judgment value 3 (1.0~1.02), the text or graphic result indicating that the cup is qualified is displayed on the display; when it is the judgment value 4 (greater than 1.02), the text or graphic result indicating that the cup is abnormal is displayed on the display.

[0028] In this embodiment, the detection light is white light, and the second execution end is a clamping terminal with a rotation function.

[0029] The above-mentioned preset voltage value is obtained by detecting a clean digestion cup. The preset voltage value V0 is 6100mV, and the judgment value is the ratio of the analog voltage Vc to V0.

[0030] An automatic cleaning device for a permanganate index analyzer digestion cup, which automatically cleans the digestion cup according to the above method. The automatic cleaning device includes a first execution end and a second execution end, wherein the second execution end includes a cup holder 11 and a support rod 12, wherein the cup holder 11 is an adaptive clamping cup holder 11, which can be used to place permanganate index analyzer digestion cups of different outer diameters, and is specifically suitable for straight-cylinder digestion cups with an outer diameter of 20 to 60 mm. The material of the digestion cup can be quartz, glass, etc.; it also supports digestion cups used in manual titration methods and digestion cups of different outer diameters with magnets used in automated instruments of different manufacturers. The support rod 12 is connected to the cup holder 11 and is used to install the cup holder 11. The support rod 12 can rotate 360° with its central axis as the rotation axis, and can stop at any angle during the rotation process, so that the cup holder 11 and the clamped digestion cup can rotate, so as to facilitate the pouring of the liquid in the digestion cup and the throwing out of the water after cleaning.

[0031] A light emitter 13 is installed in the middle of the support rod, and a sensor 14 is installed at the end of the support rod. In this embodiment, the light emitter 13 is a white light LED light source, which has the advantages of low energy consumption, strong applicability, high stability, short response time, no pollution to the environment, and multi-color light emission. Sensor 14 is an RGB color transmission sensor, and its photodiode array with a filter converts the incident light into R, G and B photocurrents, which are then amplified and converted into analog voltages. Since all three outputs increase linearly with the increase of light density, sensor 14 can measure the color and total density of light at the same time.

[0032] A cleaning tank 15 is provided below the cup holder 11 for receiving and temporarily storing the liquid dumped from the digestion cup. The height of the cleaning tank 15 is 1 to 10 cm higher than the height of the digestion cup, so as to ensure that the waste liquid does not splash out after being dumped from the digestion cups of different heights. A first execution end - a rinsing component 16 is provided in the cleaning tank 15, which is installed at the bottom of the cleaning tank 15 and can enter different cleaning liquid cleaning processes according to the judgment results. The center of the rinsing component 16 is the main flushing port, which can directly reach the bottom of the digestion cup. The flushing liquid flowing out of the main flushing port diffuses and rinses from the center to the surroundings to ensure that the digestion cup and the magnet are thoroughly cleaned. There are at least 36 liquid outlets around the main flushing port. The liquid outlet can automatically adjust the spray direction according to the digestion cups of different outer diameters, directly reaching the annular inner wall at the bottom of the digestion cup, ensuring that the inside of the digestion cup can be in contact with the cleaning liquid, ensuring that the digestion cup is cleaned 360° without dead ends by the cleaning liquid.

[0033] The liquid storage unit includes a first liquid storage mechanism 21 for storing cleaning liquid, a second liquid storage mechanism 22 for collecting waste liquid, and a third liquid storage mechanism 23. Among them, the first liquid storage mechanism 21 is provided with three partitions, namely, a first area 211 for storing water, a second area 212 for storing cleaning liquid A, and a third area 213 for cleaning liquid B. The second liquid storage mechanism 22 is used to collect the waste liquid after elution of the sample poured from the digestion cup, cleaning liquid A and cleaning liquid B, and the waste liquid in the mechanism needs to be recycled; the third liquid storage mechanism 23 is used to collect the waste liquid after elution with water, and the waste liquid of the mechanism can be directly processed in the laboratory.

[0034] The infusion unit is connected to the liquid storage unit, and includes a liquid inlet module 31, wherein the liquid inlet module 31 is connected to the first liquid storage mechanism 21 and the elution assembly 16, and is used to deliver the cleaning liquid to the elution assembly 16. The liquid inlet module 31 is an automatic cleaning liquid switching module, which includes a multi-way valve 311, which can select 3 to 6 channel valve heads, and the flow path diameter is 2 to 4 mm, wherein the common port of the multi-way valve 311 is connected to the elution assembly 16. The liquid inlet module 31 also includes a first liquid inlet channel 313, a second liquid inlet channel 314 and a third liquid inlet channel 315, and a flow pump 312 is installed on each liquid inlet channel, wherein one end of the first liquid inlet channel 313 is connected to the first zone 211 of the first liquid storage mechanism 21, and the other end is connected to a port of the multi-way valve 311, which is used to transport the water in the first zone 211 to the elution component 16; one end of the second liquid inlet channel 314 is connected to the second zone 212 of the first liquid storage mechanism 21, and the other end is connected to a port of the multi-way valve 311, which is used to transport the cleaning liquid A in the second zone 212 to the elution component 16; one end of the third liquid inlet channel 315 is connected to the third zone 213 of the first liquid storage mechanism 21, and the other end is connected to a port of the multi-way valve 311, which is used to transport the cleaning liquid B in the third zone 213 to the elution component 16.

[0035] The infusion unit also includes a first liquid outlet channel 32 and a second liquid outlet channel 33, wherein one end of the first liquid outlet channel 32 is connected to a first liquid outlet port disposed at the bottom of the cleaning tank 15, and the other end is connected to the second liquid storage mechanism 22, and is used to transport the poured sample, the waste liquid after elution with the cleaning liquid A, and the waste liquid after elution with the cleaning liquid B in the cleaning tank 15 to the second liquid storage mechanism 22; one end of the second liquid outlet channel 33 is connected to a second liquid outlet port disposed at the bottom of the cleaning tank 15, and the other end is connected to the third liquid storage mechanism 23, and is used to transport the waste liquid after elution with water in the cleaning tank 15 to the third liquid storage mechanism 23.

[0036] Example 1 A method for cleaning a sample digestion cup of a permanganate index analyzer, which is suitable for cleaning a digestion cup for testing high-concentration samples, a digestion cup that has been placed for a long time, and a digestion cup wall with manganese dioxide adsorbed thereon, and specifically comprises the following steps: S1, put the digestion cup to be cleaned into the cup holder 11, start the automatic cleaning button, rotate the support rod 12 by 180 degrees, pour the sample, and the sample enters the second liquid storage mechanism 22 through the first liquid outlet and the first liquid outlet channel 32; S2, after the sample is poured, the luminous body 13 emits a detection light, so that the light penetrates the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value 1, and the flow pump 312 and the second liquid inlet channel 314 transport the cleaning liquid A (with a concentration of 10-30% oxalic acid solution) in the second area 212 of the first liquid storage mechanism 21 to the elution component 16, and the digestion cup is rinsed according to the preset time. After cleaning, the waste liquid enters the second liquid storage mechanism 22 through the first liquid outlet and the first liquid outlet channel 32; S3, the digestion cup is cleaned and the detection instruction is returned. The light emitter 13 emits a detection light to make the light penetrate the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain the judgment value 2, the flow pump 312 and the first liquid inlet channel 313 transport the deionized water in the first area 211 of the first liquid storage mechanism 21 to the elution component 16, at which time the resistivity reaches 18 MΩ*cm (25°C), the elution component 16 rinses the digestion cup according to the preset time, and the waste liquid after cleaning enters the third liquid storage mechanism 23 through the second liquid outlet and the second liquid outlet channel 33; S4, after the digestion cup is rinsed, the support rod 12 rotates 360 degrees according to a preset cycle of 2 to 10, and the water in the digestion cup is drained; S5, ending the moisture control process, the light emitting body 13 emits a detection light, allowing the light to penetrate the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and a corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value 3, and the text result that the cup is qualified is displayed on the display of the device, the cup cleaning is completed, the digestion cup is qualified, and can continue to be used.

[0037] Example 2 A method for cleaning a sample digestion cup of a permanganate index analyzer, which is suitable for cleaning a digestion cup that has been tested with blank samples and low-concentration samples and has no manganese dioxide adsorbed on the cup wall, and specifically comprises the following steps: S1, put the digestion cup to be cleaned into the cup holder 11, start the automatic cleaning button, rotate the support rod 12 by 180 degrees, pour the sample, and the sample enters the second liquid storage mechanism 22 through the first liquid outlet and the first liquid outlet channel 32; S2, after the sample is poured, the light emitter 13 emits a detection light, so that the light penetrates the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value 2, and the flow pump 312 and the first liquid inlet channel 313 transport the deionized water in the first area 211 of the first liquid storage mechanism 21 to the elution component 16, at which time the resistivity reaches 18 MΩ*cm (25°C), and the elution component 16 rinses the digestion cup according to the preset time, and the waste liquid after cleaning enters the third liquid storage mechanism 23 through the second liquid outlet and the second liquid outlet channel 33; S3, after the digestion cup is rinsed, the support rod 12 rotates 360 degrees according to a preset cycle of 2 to 10, and the water in the digestion cup is drained; S4, ending the moisture control process, the light emitting body 13 emits a detection light, allowing the light to penetrate the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and a corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value 3, and the text result that the cup is qualified is displayed on the display of the device, the digestion cup cleaning is completed, the digestion cup is qualified, and can continue to be used.

[0038] Example 3 A method for cleaning a sample digestion cup of a permanganate index analyzer, which is suitable for cleaning a digestion cup for testing high-concentration samples, a digestion cup that has been placed for a long time, and a digestion cup wall with manganese dioxide adsorbed thereon, and specifically comprises the following steps: S1, put the digestion cup to be cleaned into the cup holder 11, start the automatic cleaning button, rotate the support rod 12 by 180 degrees, pour the sample, and the sample enters the second liquid storage mechanism 22 through the first liquid outlet and the first liquid outlet channel 32; S2, after the sample is poured, the light body 13 emits a detection light, so that the light penetrates the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value 1, and the flow pump 312 and the second liquid inlet channel 314 transport the cleaning liquid A (with a concentration of 10-30% oxalic acid solution) in the second area 212 of the first liquid storage mechanism 21 to the elution component 16, and the digestion cup is rinsed according to the preset time. After cleaning, the waste liquid enters the second liquid storage mechanism 22 through the first liquid outlet and the first liquid outlet channel 32; S3, the digestion cup is cleaned and the detection instruction is returned. The light emitter 13 emits a detection light to make the light penetrate the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain the judgment value 2, the flow pump 312 and the first liquid inlet channel 313 transport the deionized water in the first area 211 of the first liquid storage mechanism 21 to the elution component 16, at which time the resistivity reaches 18 MΩ*cm (25°C), the elution component 16 rinses the digestion cup according to the preset time, and the waste liquid after cleaning enters the third liquid storage mechanism 23 through the second liquid outlet and the second liquid outlet channel 33; S4, after the digestion cup is rinsed, the support rod 12 rotates 360 degrees according to a preset cycle of 2 to 10, and the water in the digestion cup is drained; S5, end the moisture control process, the light-emitting body 13 emits a detection light, so that the light penetrates the digestion cup to be detected; the detection light penetrating the digestion cup is converted into an RGB color signal, and the corresponding analog voltage value is output; the analog voltage value is compared with the preset voltage value to obtain a judgment value 4, the digestion cup cleaning is completed, the digestion cup is abnormal, and a new digestion cup is replaced.

[0039] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope of the present invention.

Claims

1. An automatic cleaning method for a permanganate index analyzer digestion cup, comprising the following steps: Send out detection light to make the light penetrate the digestion cup to be detected; The detection light penetrating the digestion cup is converted into an RGB color signal, and a corresponding analog voltage value is output; the analog voltage value is compared with a preset voltage value to obtain a judgment value; When the judgment value is 1, an instruction to spray cleaning liquid and return for detection is sent to the first execution end; when the judgment value is 2, an instruction to spray water and drain the water is sent to the first execution end.

2. The automatic cleaning method for a permanganate index analyzer digestion cup according to claim 1, characterized in that: When the judgment value is 2, an instruction to spray water and control the moisture is sent to the first execution end; and the following procedures are executed in sequence: continue to emit detection light to make the light penetrate the digestion cup to be detected; convert the incident light penetrating the digestion cup into RGB color signals, and output the corresponding analog voltage value; compare the analog voltage value with the preset voltage value, and output the judgment value; when the judgment value is 3, display the text or graphic result that the cup is qualified on the display; When the judgment value is 4, the display shows the abnormal text or graphic results of the cup.

3. The automatic cleaning method for a permanganate index analyzer digestion cup according to claim 1 or 2, characterized in that: The detection light is white light.

4. The automatic cleaning method for a permanganate index analyzer digestion cup according to claim 1 or 2, characterized in that: Before emitting the detection light, the method also includes sending an instruction to pour the sample to the second execution end.

5. The automatic cleaning method for a permanganate index analyzer digestion cup according to claim 4, characterized in that: The second execution end is a clamping terminal with a rotation function.

6. The automatic cleaning method for a permanganate index analyzer digestion cup according to claim 1 or 2, characterized in that: The preset voltage value is obtained by detecting a clean digestion cup.

7. An automatic cleaning device for a digestion cup of a permanganate index analyzer, characterized in that: include: A light emitting body (13), used for emitting the detection light according to any one of claims 1 to 3, and allowing the detection light to penetrate a digestion cup to be detected; The sensor (14) is used to receive the detection light penetrating the digestion cup, convert the detection light into an RGB color signal, and output a corresponding analog voltage value; The processor compares the analog voltage value with the preset voltage value to obtain a judgment value; When the judgment value is 1, an instruction to spray cleaning liquid and return detection is sent to the first execution end; when the judgment value is 2, an instruction to spray water and drain the water is sent to the first execution end; when the judgment value is 3, the result that the digestion cup is qualified is sent to the display; when the judgment value is 4, the result that the digestion cup is abnormal is sent to the display.

8. The automatic cleaning device for the digestion cup of a permanganate index analyzer according to claim 7, characterized in that: The cleaning device further comprises a clamping terminal with a rotation function, the clamping terminal comprising a cup holder (11) and a rotatable support rod (12) for mounting the cup holder (11), and the luminous body (13) and the sensor (14) are arranged on the support rod (12).

9. The automatic cleaning device for the digestion cup of a permanganate index analyzer according to claim 8, characterized in that: The first execution end is a rinse component (16) disposed in a cleaning tank (15) below the cup holder (11); the rinse component (16) is connected to a liquid storage unit for storing cleaning liquid and waste liquid via an infusion unit.

10. The automatic cleaning device for the digestion cup of a permanganate index analyzer according to claim 9, characterized in that: The liquid storage unit comprises a first liquid storage mechanism (21) for storing water and cleaning liquid, a second liquid storage mechanism (22) and a third liquid storage mechanism (23) for collecting waste liquid; the liquid infusion unit comprises a liquid inlet module (31) for connecting the first liquid storage mechanism (21) and the rinsing assembly (16), a first liquid outlet channel (32) for connecting the second liquid storage mechanism (22) and the cleaning tank (15), and a second liquid outlet channel (33) for connecting the third liquid storage mechanism (23) and the cleaning tank (15).

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