CN117805369A

CN117805369A - Dry-type fluorescence immunoassay appearance

Info

Publication number: CN117805369A
Application number: CN202311869380.8A
Authority: CN
Inventors: 潘嘉淦; 刘爱华
Original assignee: Jiangsu Jiutai Pharmaceutical Co ltd
Current assignee: Jiangsu Jiutai Pharmaceutical Co ltd
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-04-02

Abstract

The invention discloses a dry fluorescent immunity detector, which belongs to the technical field of fluorescent immunity, and comprises a machine body and a display screen, wherein the machine body is provided with: a card storage bin; the card feeding mechanism comprises a card feeding groove and a card feeding push rod, and the card feeding push rod is connected with a push block; the detection mechanism comprises a detection groove and a sample adding guide hole, a first sealing plate is hinged below the sample adding guide hole, and a torsion spring is arranged at the hinged position of the first sealing plate, so that the first sealing plate seals the sample adding guide hole; the card discarding mechanism comprises a turnover plate and a waste card bin, the turnover plate is hinged on the machine body, and a turnover push rod is arranged at the bottom of the turnover plate; the cleaning mechanism comprises an air pump and a filter element, wherein the air inlet end of the air pump is connected with the filter element, and the other end of the air pump is connected to the detection groove through a pipeline, and the cleaning mechanism has the following beneficial effects: the mechanical automatic card feeding and discarding improves the working efficiency; the sample is dripped through the sample adding guide hole, so that the sample can be conveniently and rapidly added; through clean mechanism, keep the interior cleanness of detection groove, avoid carrying the card to receive the pollution.

Description

Dry-type fluorescence immunoassay appearance

Technical Field

The invention relates to the technical field of fluorescence immunity, in particular to a dry fluorescence immunity detector.

Background

Immunofluorescence (Immunofluorescence technique), also known as fluorescent antibody, is the earliest of the label immunotechniques. It is a technology based on immunological, biochemical and microscopic technologies. Since the antigen-antibody reaction has high specificity, when the antigen-antibody reaction occurs, one factor can be found out as long as the other factor is known. Immunofluorescence is a technique in which fluorescent pigments which do not affect the activity of antigen-antibody are marked on the antibody (or antigen), and after being combined with the corresponding antigen (or antibody), a specific fluorescent reaction is presented under a fluorescent microscope.

The dry fluorescent immunodetector is one kind of instrument for implementing immunofluorescence technology in modern medicine. Such instruments are typically used with a card carrier, which has a card slot into which the card carrier is inserted. When the test device is used, an operator needs to align the dropper with the carrier card, drop samples on the carrier card, carefully insert the carrier card into the card insertion port, automatically detect the samples on the carrier card by the instrument, print detection information, and take out the carrier card after the detection is finished and discard the carrier card.

The prior instrument is complex in operation of staff during use, and particularly needs to be carefully operated by an operator during sample dripping, so that the prior instrument has the problems of low working efficiency and easiness in error in the operation process.

Disclosure of Invention

The invention aims to provide a dry fluorescent immunity detector which has the characteristics of simplicity in operation and high working efficiency.

The technical aim of the invention is realized by the following technical scheme: the utility model provides a dry-type fluorescence immunity detector, includes fuselage, display screen, and the fuselage is provided with:

the card storage bin is arranged at the top of the machine body and used for stacking the cards;

the card feeding mechanism comprises a card feeding groove and a card feeding push rod which are arranged at the bottom of the card storage bin, and the power end of the card feeding push rod is connected with a push block;

the detection mechanism comprises a detection groove and a sample feeding guide hole, wherein the detection groove is used for placing a carrier card to be detected, the sample feeding guide hole is arranged above the detection groove, the sample feeding guide hole is opposite to a dripping point of the carrier card, the lower part of the sample feeding guide hole is hinged with a first sealing plate, and a torsion spring is arranged at the hinged part of the first sealing plate, so that the first sealing plate covers the sample feeding guide hole;

the card discarding mechanism comprises a turnover plate serving as the bottom surface of the detection groove and a waste card bin, wherein the turnover plate is hinged to the machine body, a turnover push rod is arranged at the bottom of the turnover plate, one end of the turnover push rod is hinged to the machine body, the other end of the turnover push rod is hinged to the bottom surface of the turnover plate, and the waste card bin is arranged below the detection groove and is used for receiving and containing waste card carriers;

the cleaning mechanism comprises an air pump and a filter element, wherein the air inlet end of the air pump is connected with the filter element, and the other end of the air pump is connected to the detection groove through a pipeline.

Preferably, the detection mechanism, the card discarding mechanism and the cleaning mechanism are respectively arranged in two;

be provided with in the fuselage, divide card mechanism to include:

the separating and clamping groove is arranged right in front of the motion direction of the pushing block and positioned in the middle of the two detection grooves, and the separating and clamping groove is communicated with the detection grooves;

the card distributing push rod is connected with the distributing block at the power output end, the distributing block is positioned in the card distributing groove, and the card distributing push rod pushes the distributing block to move along the length direction of the card distributing groove.

Preferably, the cleaning mechanism comprises an electric three-way valve I, and the air outlet end of the air pump is connected with the three-way valve through a pipeline and then is respectively connected with the two detection grooves;

the cleaning mechanism further comprises a water tank, a water supply pump and a three-way valve II, wherein the water inlet end of the water pump is connected with the water tank, and the water outlet end is connected with the three-way valve II through a pipeline and then is respectively connected to the two detection grooves;

the shape of the distributing block is matched with the size of the inlet of the detection groove, so that the distributing block can seal the inlet of the detection groove.

Preferably, the dispensing block is made of a rubber material.

Preferably, the inlet of the detection groove is hinged with a second sealing plate, and the hinged part of the second sealing plate is provided with a torsion spring, so that the second sealing plate has a tendency of sealing the detection groove and can only be opened by rotating towards the inside of the detection groove.

Preferably, a rotary spray head is arranged at an air inlet connected with the air pump in the detection groove.

Preferably, the waste card bin is detachably arranged.

Preferably, the machine body is provided with a cleaning indicator lamp, when the cleaning mechanism operates, the cleaning indicator lamp displays red, and after the cleaning mechanism operates, the cleaning indicator lamp displays green.

In summary, the invention has the following beneficial effects:

1. the mechanical automatic card feeding and discarding improves the working efficiency;

2. the sample is dripped through the sample adding guide hole, so that the sample can be conveniently and rapidly added;

3. through clean mechanism, keep the interior cleanness of detection groove, avoid carrying the card to receive the pollution.

Drawings

FIG. 1 is a top view of the fuselage of example 1;

FIG. 2 is a cross-sectional view of the fuselage of FIG. 1 taken along the direction AA';

FIG. 3 is an enlarged schematic view of portion B of FIG. 2;

FIG. 4 is a cross-sectional view of the fuselage of FIG. 1 taken in the direction CC';

FIG. 5 is a top view of the fuselage of example 2;

fig. 6 is a cross-sectional view of the body in the horizontal direction in embodiment 2;

FIG. 7 is a cross-sectional view taken along DD' in FIG. 5;

fig. 8 is a cross-sectional view of the body in embodiment 3.

In the figure, 1, a fuselage; 11. a display screen; 12. an indicator light; 13. carrying a card; 2. a card storage bin; 31. a clamping groove is formed; 32. a card feeding push rod; 33. a pushing block; 41. a detection groove; 42. a sample adding guide hole; 43. a first sealing plate; 44. a second sealing plate; 51. a turnover plate; 52. a waste card bin; 53. turning over the push rod; 61. an air pump; 62. a filter element; 63. a first three-way valve; 64. a water tank; 65. a water feed pump; 66. a three-way valve II; 67. rotating the spray head; 71. a card dividing groove; 72. a card separating push rod; 73. and (5) distributing the blocks.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.

Example 1:

a dry type fluorescence immunoassay instrument, as shown in figure 1, comprises a machine body 1, wherein a display screen 11 is arranged on the machine body 1 and used for displaying detection data. The upper surface of the machine body 1 is provided with a card storage bin 2, a card carrying 13 to be used is placed in the card storage bin 2, and the top of the card storage bin 2 is provided with an openable cover plate. The detection mechanism is arranged in the machine body 1 near the card storage bin 2 and comprises a detection groove 41, the detection groove 41 is used for placing the card 13 to be detected, and the shape of the detection groove is matched with that of the card 13. The top of the detection groove 41 is provided with a sample-feeding guide hole 42. When the carrier card 13 enters the detection groove 41, the sample application guide hole 42 is opposite to the drop point of the carrier card 13 along the vertical direction. The bottom edge of the sample introduction guide hole 42 is hinged with a first turnable sealing plate 43, and the first sealing plate 43 can only be turned towards the inside of the detection groove 41. The hinge joint of the first sealing plate 43 and the machine body 1 is connected with a torsion spring, and the torsion spring enables the first sealing plate 43 to have upward rotation trend, so that the first sealing plate 43 can keep the state of sealing the sample feeding guide hole 42 at ordinary times. During sample application, the dropper is downwardly inserted into the sample application guide hole 42 from above the sample application guide hole 42, and the first sealing plate 43 is pushed open in a proper manner, so that the end part of the dropper enters the detection groove 41 and is aligned with the drop point of the carrier card 13. The body 1 is provided with a cleaning mechanism for cleaning the detection groove 41, and the cleaning mechanism includes an air pump 61 and a filter element 62. The air pump 61 is installed in the side of the fuselage 1, and the air inlet end of air pump 61 is connected with filter element 62, and the other end communicates to the detection groove 41 through the top of detection groove 41. Since there may be a case where the sample flows out and is stained in the detection groove 41 due to an excessively large dropping amount when the sample is dropped onto the carrier card 13 in the detection groove 41. Through the work of air pump 61, blow in to detecting groove 41, further cooperate other structures, can blow away the sample that is stained in detecting groove 41 to the rapid draing, and then prevent that this sample from causing the influence to the detection next time. The top surface of the machine body 1 is also provided with an indicator lamp 12, when the cleaning mechanism is in a working state, the indicator lamp 12 displays red to indicate that the detection groove 41 cannot be used at the moment, and when the cleaning mechanism is in a working state, the indicator lamp 12 displays green to indicate that the detection groove 41 is in a standby state.

As shown in fig. 2, the card storage compartment 2 has a tower shape, and the card carrier 13 is stacked in the card storage compartment 2. A card feeding mechanism is arranged in the machine body 1 and comprises a card feeding push rod 32 and a card feeding groove 31. The card inlet groove 31 is communicated with the bottom of the card storage bin 2. The card feeding push rod 32 is an electric push rod, the power output end of the electric push rod is connected with a push block 33, the thickness of the push block 33 is not larger than that of the card 13, and the push block 33 is aligned with the card 13. When the card-feeding push rod 32 pushes the push block 33 forward, the push block 33 pushes one card 13 to move forward. The detecting groove 41 is also communicated with the bottom of the card storage bin 2, and the top of the detecting groove 41 is higher than the lowest card 13 and lower than the top surface of the second card 13 under Fang Daoshu. The machine body 1 is also internally provided with a card discarding mechanism which is used for discarding the detected card 13 and comprises a turnover plate 51, a turnover push rod 53 and a waste card bin 52. The turnover plate 51 is a bottom surface of the detection groove 41, is of a turnover design, and can only be turned down. The turn push rod 53 is disposed below the turn plate 51, and has one end hinged to the bottom surface of the turn plate 51 and the other end hinged to the body 1. When the flipping push rod 53 is shortened, the flipping plate 51 is driven to rotate downward, so that the card 13 placed in the detection slot 41 slides out. When the flipping push rod 53 is extended, the flipping plate 51 is driven to rotate upward, so that the flipping plate 51 serves as a bottom plate of the detection slot 41 for placing the card 13. The waste card hopper 52 is mounted below the flipping plate 51, and the waste card hopper 52 is of a detachable design, and the waste card hopper 52 can be moved out of or mounted to the body 1 by sliding.

As shown in FIG. 3, the loading guide hole 42 guides the dropper, so that the dropper can be more conveniently inserted into the loading guide hole 42. The middle of the first sealing plate 43 protrudes upwards and enters the sample application guide hole 42 to perform better sealing function.

As shown in fig. 4, an air inlet connected to the air pump 61 in the detection tank 41 is provided at the top of the detection tank 41, and a rotary shower head 67 is connected to the air inlet. The rotary sprayer 67 is a sprayer rotatable under the impact of fluid and is commonly used in the gardening field for irrigation. In the present embodiment, the air inputted from the air pump 61 enters the detection groove 41 through the rotary head 67. The rotary spray head 67 rotates under the action of the air flow, so that the direction of the air flow spraying is changed, the air flow is sprayed from a plurality of angles, the detection groove 41 is sprayed in all directions, and the detection groove 41 is cleaned better.

The using method comprises the following steps:

the preparation stage: the card loading 13 is sequentially stacked in the card storage bin 2, and a cover plate at the top of the card storage bin 2 is covered.

And (3) detection: starting the card feeding push rod 32, pushing the card 13 at the bottommost part of the card storage bin 2 into the detection groove 41, and at the moment, the drop point on the card 13 is positioned right below the sample feeding guide hole 42, and the card feeding push rod 32 retracts to drive the push block 33 to return to the card feeding groove 31; the method comprises the steps that a dropper is used for sucking samples, the dropper is inserted into a sample feeding guide hole 42 downwards from the upper side of the sample feeding guide hole 42, in the process, the bottom end of the dropper is propped against a first sealing plate 43, the first sealing plate 43 is opened, the dropper continuously moves downwards to approach a dripping point on a carrier card 13, and the dropper is taken out after the samples are dripped on the carrier card 13; the instrument is started, and a detection module in the instrument detects information on the carrier card 13.

Discarding the card: after the detection is finished, the overturning push rod 53 is started, so that the overturning push rod 53 is contracted, the overturning plate 51 is driven to rotate downwards, and at the moment, the card 13 slides downwards under the action of self gravity and slides to the waste card bin.

Cleaning: the air pump 61 is started, air enters the rotary spray head 67 through the filter element 62 under the action of the air pump 61 and is sprayed into the detection groove 41, residual larger water drops in the detection groove 41 are blown into the waste card bin, smaller water drops are dried, the detection groove 41 is kept dry, the indicator lamp 12 is red in the cleaning process, the overturning push rod 53 is elongated after the cleaning is finished, the overturning plate 51 is rotated upwards, the bottom of the detection groove 41 is further sealed, and the indicator lamp 12 is green.

Example 2:

the dry type fluorescence immunoassay instrument of this embodiment 2 is basically the same as embodiment 1, except that two sets of detecting mechanism, cleaning mechanism and card discarding mechanism are provided in this embodiment 2, and an indicator lamp 12 is provided on the surface of the machine body 1 near each cleaning mechanism. As shown in fig. 5, the main body 1 of the present embodiment 2 is provided with a card separating mechanism mainly including a card separating groove 71 communicating with the bottom of the card storage 2. The two detecting mechanisms and the cleaning mechanism are respectively positioned at two sides of the card separating groove 71. When the card feeding mechanism is used, the card carrying mechanism firstly pushes the card carrying 13 into the card separating mechanism, and then the card separating mechanism pushes the card carrying 13 into the detecting mechanism. The two detection mechanisms work in turn, while one is in the detection phase and the other is in the cleaning phase, so that the instrument of embodiment 2 can work continuously, while reducing the waiting time. The air pump 61 in this embodiment 2 is connected with a three-way valve one 63, and the three-way valve one 63 is connected with the two detection tanks 41 respectively through pipe connections. In embodiment 2, a water tank 64 and a water feed pump 65 are further provided, one end of the water feed pump 65 is connected to the water tank 64, and the other end is connected to the two detection tanks 41 through a three-way valve two 66. The first three-way valve 63 and the second three-way valve 66 are all electromagnetic valves and controlled by a circuit module, and belong to the prior art, so that the description is omitted.

As shown in fig. 6, both ends in the longitudinal direction of the card dividing groove 71 communicate with the detection groove 41, respectively. A second sealing plate 44 is hinged at the connection position of each detection groove 41 and the sub-clamping groove 71, and the second sealing plate 44 can only rotate in the detection groove 41. The hinge joint of the second sealing plate 44 is provided with a torsion spring, and the torsion spring has the function of enabling the second sealing plate 44 to have a tendency to rotate towards the separating clamping groove 71, so that the separating clamping groove 71 and the detecting groove 41 are kept sealed. The card separating mechanism further includes a card separating push rod 72, and the card separating push rod 72 is an electric push rod, which is disposed parallel to the length direction of the card separating groove 71. The power output end of the card separating push rod 72 is connected with a separating block 73. The distributing block 73 is located in the distributing slot 71, so that the distributing push rod 72 can push the distributing block 73 to slide along the length direction of the distributing slot 71.

As shown in fig. 7, in the embodiment 2, the depth of the detecting slot 41 is greater than the depth of the card separating slot 71, and when the card 13 is pushed into the detecting slot 41, a part of the space remains on the top, which is convenient for opening the first sealing plate 43 and operating the rotary nozzle 67.

The using method comprises the following steps:

the method of use of this embodiment 2 is substantially the same as that of embodiment 1, except that, in use, the two cleaning mechanisms alternately operate in turn, specifically as follows:

And (3) detection: the card feeding push rod 32 is started to push the card 13 at the bottommost part of the card storage bin 2 into the card dividing groove 71, the card dividing push rod is started to drive the card dividing block 73 to move, when the card dividing block 73 moves, the card 13 in the card dividing groove 71 is pushed to move towards one of the detection grooves 41, the card 13 is firstly propped against the second sealing plate 44 in the process, the elasticity of the torsion spring is overcome, the second sealing plate 44 is enabled to overturn inwards, and when the card 13 is pushed to the bottom of the detection groove 41, the second sealing plate 44 resets under the acting force of the torsion spring, and the opening of the detection groove 41 is sealed. At this time, the drop point on the carrier card 13 is located right below the corresponding sample addition guide hole 42; the method comprises the steps that a dropper is used for sucking samples, the dropper is inserted into a sample feeding guide hole 42 downwards from the upper side of the sample feeding guide hole 42, in the process, the bottom end of the dropper is propped against a first sealing plate 43, the first sealing plate 43 is opened, the dropper continuously moves downwards to approach a dripping point on a carrier card 13, and the dropper is taken out after the samples are dripped on the carrier card 13; the instrument is started, and a detection module in the instrument detects information on the carrier card 13.

Cleaning: firstly, the water feed pump 65 is started to flush the inside of the detection tank 41, and the cleaning water does not enter the card dividing tank 71 due to the sealing of the second sealing plate 44; after cleaning, the air pump 61 is started, air enters the rotary spray head 67 through the filter element 62 under the action of the air pump 61 and is sprayed into the detection groove 41, residual larger water drops in the detection groove 41 are purged into the waste card bin, smaller water drops are dried, the detection groove 41 is kept dry, the indicator lamp 12 displays red color in the cleaning process, after cleaning, the overturning push rod 53 stretches, the overturning plate 51 rotates upwards, the bottom of the detection groove 41 is further sealed, and the indicator lamp 12 displays green color. It should be noted that, the detection tank 41 is not required to be flushed after each detection, and the user may optionally only start the purging function, and selectively start the flushing function, so as to shorten the duration of the cleaning stage.

When one of the detecting grooves 41 is in the cleaning stage, the other detecting groove 41 can enter the detecting stage, and the carrier 13 pushed by the pushing block 33 into the separating groove 71 is pushed into the other detecting groove 41 by the separating block 73, so that the waiting time can be reduced.

Example 3:

as shown in fig. 8, in the dry type fluorescence immunoassay apparatus of embodiment 3, a seal plate two 44 is not provided between the separation groove 71 and the detection groove 41 in embodiment 3, the shape of the separation block 73 is matched with the cross section of the separation groove 71, the separation block 73 is made of a rubber material, and when the separation block 73 moves between the separation groove 71 and the detection groove 41, the separation block 73 seals the detection groove 41 and isolates the detection groove 41 from the separation groove 71. The water inlet in the detection tank 41 is close to the bottom surface of the detection tank 41 to avoid adhesion of the washing water to the dial block 73. The card separating groove 71, the detecting groove 41, and the waste card hopper are not completely sealed from the outside, so that the movement of the distributing block 73 is not blocked by the influence of the air pressure.

The using method comprises the following steps:

the method of using this embodiment 3 is basically the same as that of embodiment 2, except that when a certain detection tank 41 is in the flushing process of the cleaning stage, the detection tank 41 is blocked by the distributing block 73, and the cleaning water is prevented from entering the distributing tank. When the detection tank 41 is purged, the allocating block 73 moves again, and the carrier card 13 is pushed to the other detection tank 41, so that the other detection tank 41 enters the detection stage.

Claims

1. The utility model provides a dry-type fluorescence immunoassay appearance, includes fuselage (1), display screen (11), and its characterized in that, fuselage (1) are provided with:

the card storage bin (2) is arranged at the top of the machine body (1) and is used for stacking the cards (13);

the card feeding mechanism comprises a card feeding groove (31) and a card feeding push rod (32), and a power end of the card feeding push rod (32) is connected with a push block (33);

the detection mechanism comprises a detection groove (41) and a sample feeding guide hole (42), wherein the detection groove (41) is used for placing a carrier card (13) to be detected, the sample feeding guide hole (42) is arranged above the detection groove (41), the sample feeding guide hole (42) is opposite to a drop-in point of the carrier card (13), a first sealing plate (43) is hinged below the sample feeding guide hole (42), and a torsion spring is arranged at the hinged position of the first sealing plate (43) to enable the first sealing plate (43) to cover the sample feeding guide hole (42);

the card discarding mechanism comprises a turnover plate (51) serving as the bottom surface of the detection groove (41) and a waste card bin (52), wherein the turnover plate (51) is hinged to the machine body (1), a turnover push rod (53) is arranged at the bottom of the turnover plate (51), one end of the turnover push rod (53) is hinged to the machine body (1), the other end of the turnover push rod is hinged to the bottom surface of the turnover plate (51), and the waste card bin (52) is arranged below the detection groove (41) and is used for receiving and containing waste card (13);

the cleaning mechanism comprises an air pump (61) and a filter element (62), wherein the air inlet end of the air pump (61) is connected with the filter element (62), and the other end of the air pump (61) is connected to the detection groove (41) through a pipeline.

2. A dry fluorescent immunoassay instrument according to claim 1, wherein,

the detection mechanism, the card discarding mechanism and the cleaning mechanism are respectively provided with two;

be provided with branch card mechanism in fuselage (1), divide card mechanism to include:

the separating and clamping groove (71), the separating and clamping groove (71) is arranged right in front of the movement direction of the pushing block (33) and is positioned in the middle of the two detection grooves (41), and the separating and clamping groove (71) is communicated with the detection grooves (41);

the card distributing push rod (72), the power take off end of which is connected with the distributing block (73), the distributing block (73) is positioned in the card distributing groove (71), and the card distributing push rod (72) pushes the distributing block (73) to move along the length direction of the card distributing groove (71).

3. A dry fluorescent immunoassay instrument according to claim 2, wherein,

the cleaning mechanism comprises a first three-way valve (63), and the air outlet end of the air pump (61) is connected with the first three-way valve (63) through a pipeline and then is respectively connected with the two detection grooves (41);

the cleaning mechanism further comprises a water tank (64), a water supply pump (65) and a second three-way valve (66), wherein the water inlet end of the water pump is connected with the water tank (64), and the water outlet end is connected with the second three-way valve (66) through a pipeline and then is respectively connected to the two detection grooves (41);

the shape of the distributing block (73) is matched with the size of the inlet of the detection groove (41), so that the distributing block (73) can seal the inlet of the detection groove (41).

4. A dry fluorescent immunoassay instrument according to claim 1, wherein the dispensing block (73) is made of a rubber material.

5. A dry type fluorescence immunoassay instrument according to claim 3, wherein the entrance of the detection slot (41) is hinged with a second sealing plate (44), and a torsion spring is provided at the hinge of the second sealing plate (44) to seal the detection slot (41), and the second sealing plate (44) can be opened only by rotating toward the inside of the detection slot (41).

6. The dry type fluorescence immunoassay instrument according to claim 1, wherein a rotary nozzle (67) is provided in the detection tank (41) at an air inlet connected to the air pump (61).

7. A dry fluorescent immunoassay instrument according to claim 1, wherein the waste cartridge (52) is removably disposed.

8. The dry-type fluorescence immunoassay instrument according to claim 1, wherein the main body (1) is provided with a cleaning indicator lamp (12), the cleaning indicator lamp (12) is displayed in red when the cleaning mechanism is operated, and the cleaning indicator lamp (12) is displayed in green after the cleaning mechanism is operated.