Bacteria detection module

Abstract

The utility model relates to the technical field of bacterium detection, in particular to a bacterium detection module, and aims to solve the problems that a bacterium quantity detection method in the prior art is long in period, cannot be used for civil use and the like. In order to achieve the purpose, the bacterium detection module comprises a shell, an excitation light source and a fluorescence detection component, the excitation light source and the fluorescence detection component are arranged in a first cavity in the shell, the excitation light source can emit excitation light after being electrified, and the excitation light can excite microorganisms carried in air to be detected to emit fluorescence. The fluorescence detection component is configured to be capable of detecting fluorescence emitted by microorganisms carried by the to-be-detected air after the to-be-detected air is irradiated by the excitation light after being electrified, and outputting a detection result. According to the device, the excitation light source and the fluorescence detection component are arranged in the same chamber, so that the quantity of microorganisms carried by the air to be detected can be timely and accurately detected without sampling, culturing and arranging a complicated light path, the detection process is simple and rapid, and the device can be widely applied to various scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of bacteria detection, and specifically provides a bacteria detection module. Background Art

[0002] There are more or less microorganisms in the air, which are usually attached to dust or droplets. As dust and droplets are suspended in the air, the presence of these microorganisms will make the air a medium for spreading respiratory diseases, seriously endangering people's health. For the sake of people's health, it is necessary to detect the number of microorganisms in the air and take appropriate measures to reduce the number of microorganisms when the number of microorganisms exceeds the standard.

[0003] At present, when detecting the number of microorganisms in the air, it is usually necessary to first use a specific sampler to sample, and then culture the sampled air sample through a culture medium, and then count it. Commonly used methods for detecting bacteria mainly include sedimentation plate method, liquid impact method, impact plate method and filter membrane method. Among them, the sedimentation plate method is to place a plate containing agar culture medium at the test location, open the plate cover to expose it for a certain period of time, and then culture it to count the number of colonies. The liquid impact method is also called the absorption tube method. A certain amount of air is quickly absorbed into the absorption liquid in the tube, and then a certain amount of this liquid is taken, diluted and plate culture is performed to count the number of colonies or isolate pathogenic microorganisms. The impact plate method is to suck a certain amount of air and quickly impact the surface of one or several rotating or non-rotating plate culture mediums, and then culture the plate to count the number of growing colonies. The filter membrane method is to pass a certain amount of air through a special filter membrane supported on the filter, such as a nitrocellulose filter membrane, so that dust particles with microorganisms adhere to the surface of the filter membrane, and then wash the dust particles trapped on the filter membrane in a suitable solution, and then absorb a certain amount of this solution to determine the number of bacteria.

[0004] However, the above detection methods usually require the use of a specific sampler to collect samples and then culture them in a culture medium, which means that the detection of bacterial counts can only be carried out in laboratories with testing qualifications. During the test, professionals are required to collect samples on site and then bring the samples back to the laboratory for culture and testing, which has the disadvantages of long detection cycles and cannot be used for civilian purposes.

[0005] Accordingly, the art needs a new technical solution to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the above technical problems, that is, to solve the problems that the detection method of the number of bacteria in the prior art has a long cycle and cannot be used for civilian purposes.

[0007] The utility model provides a bacteria detection module, which includes a shell, an excitation light source and a fluorescence detection component. The shell has a first chamber, the excitation light source and the fluorescence detection component are arranged in the first chamber, the excitation light source is configured to emit excitation light after being powered on, the excitation light can excite microorganisms carried in the air to be tested to emit fluorescence, and the fluorescence detection component is configured to detect the fluorescence emitted by the microorganisms carried in the air to be tested after the air to be tested is irradiated with the excitation light after being powered on, and output the detection result.

[0008] In the preferred technical solution of the above-mentioned bacteria detection module, the shell also has a second chamber, the second chamber is connected to the first chamber and is arranged on the downstream side of the fluorescent detection component along the irradiation direction of the excitation light, and a light trap is formed in the second chamber, and the light trap is configured to eliminate the light from the first chamber.

[0009] In the preferred technical solution of the above-mentioned bacteria detection module, at least a portion of the inner wall of the second chamber is coated with a light absorbing material to form the light trap.

[0010] In the preferred technical solution of the above-mentioned bacteria detection module, the second chamber and the first chamber share a side wall, a first ventilation structure is provided on the shared side wall, and the second chamber and the first chamber are connected to each other through the first ventilation structure.

[0011] A first matte plate is arranged in the second chamber, one side of the first matte plate is connected to the common side wall located on the first side of the first ventilation structure, the first matte plate and the common side wall have an angle, and at least a portion of the first matte plate is aligned with the first ventilation structure.

[0012] In the preferred technical solution of the above-mentioned bacteria detection module, a second matte plate is also arranged in the second chamber, and the second matte plate is arranged on the side of the first matte plate facing the first ventilation structure, the first side edge of the second matte plate is connected to the common side wall located on the second side of the first ventilation structure, and there is a distance between the second side edge of the second matte plate opposite to the first side edge and the first matte plate.

[0013] In the preferred technical solution of the above-mentioned bacteria detection module, the shell also has a third chamber, a second ventilation structure is arranged between the third chamber and the first chamber, the third chamber is connected with the first chamber through the second ventilation structure, and the third chamber is provided with an inlet, and the air to be tested can enter the third chamber through the inlet and then enter the first chamber through the second ventilation structure.

[0014] In the preferred technical solution of the above-mentioned bacteria detection module, a third ventilation structure is also provided on the first chamber, and the third ventilation structure is connected to the external environment so as to allow the air to be tested that enters the first chamber through the second ventilation structure to be discharged to the external environment through it.

[0015] In the preferred technical solution of the above-mentioned bacteria detection module, the shell further has a fourth chamber, the fourth chamber is connected to the first chamber through the third ventilation structure, the fourth chamber is provided with an outlet, and the fourth chamber is connected to the external environment through the outlet.

[0016] In the preferred technical solution of the above-mentioned bacteria detection module, a flow guide component is arranged in the fourth chamber, and the flow guide component is arranged at a position close to the third ventilation structure. The flow guide component is configured to guide the air flowing out through the third ventilation structure to an area in the fourth chamber away from the outlet.

[0017] In a preferred technical solution of the above-mentioned bacteria detection module, the bacteria detection module further includes a power supply module, which is disposed in the housing and is electrically connected to the excitation light source and the fluorescence detection component, respectively.

[0018] In the technical solution of the utility model, the bacteria detection module includes a shell, an excitation light source and a fluorescence detection component. The shell has a first chamber, and the excitation light source and the fluorescence detection component are both arranged in the first chamber. Among them, the excitation light source is configured to emit excitation light after being powered on, and the excitation light can excite the microorganisms carried by the air to be tested to emit fluorescence. The fluorescence detection component is configured to detect the fluorescence emitted by the microorganisms carried by the air to be tested after being irradiated with the excitation light after being powered on, and output the detection result. Since microorganisms, especially bacteria, usually have various fluorescent groups, fluorescence will be generated under the induction of the excitation light. In this way, after the air to be tested enters the first chamber and is irradiated with the excitation light, the microorganisms carried in the air to be tested will emit fluorescence, and the fluorescence detection component arranged in the first chamber can detect these fluorescences in time, and the number of microorganisms in the air to be tested can be obtained. Through such a setting, the excitation light source and the fluorescence detection component are arranged in the same chamber. There is no need to set up a complicated optical path. The fluorescence emitted by the microorganisms carried in the air to be tested after being irradiated by the excitation light can be detected in a timely and accurate manner, and the number of microorganisms carried by the air to be tested can be determined. There is no need for sampling and cultivation. The detection process is simple and fast, which saves time and can be widely used in various scenarios.

[0019] Furthermore, the housing also has a second chamber, which is connected to the first chamber and is arranged on the downstream side of the fluorescence detection component along the irradiation direction of the excitation light, and a light trap is formed in the second chamber. When the bacteria detection module is running, after the excitation light emitted by the excitation light source irradiates the air to be tested, the excess excitation light enters the second chamber and is absorbed and eliminated by the light trap, thereby eliminating light noise, effectively avoiding interference with the fluorescence signal, and avoiding affecting the detection of the fluorescence detection component. In this way, the fluorescence signal emitted by the microorganisms carried in the air can be detected more accurately, thereby improving the accuracy of the detection.

[0020] Furthermore, at least a portion of the inner wall of the second chamber is coated with a light absorbing material, and the second chamber is further provided with a first matte plate and a second matte plate, one side edge of the first matte plate is connected to a common side wall shared by the first chamber and the second chamber on a first side of the first ventilation structure, the first matte plate and the common side wall have an angle, and at least a portion thereof is aligned with the first ventilation structure on the common side wall. The second matte plate is provided on a side of the first matte plate facing the first ventilation structure, the first side edge of the second matte plate is connected to the common side wall on a second side of the first ventilation structure, and there is a distance between the second side edge and the first matte plate. In this way, when excess excitation light passes through the first ventilation structure and enters the second chamber at a reasonable angle, it will be reflected by the first extinction plate to other areas in the second chamber, and then reflected multiple times by other inner walls in the second chamber and the second extinction plate. The excitation light will attenuate after being reflected. At the same time, the excitation light entering the second chamber will also be absorbed by the light-absorbing material coated in the second chamber, thereby effectively eliminating the excitation light entering the second chamber, preventing it from being reflected into the first chamber to interfere with the detection of the fluorescent detection component, thereby improving the detection accuracy of the bacteria detection module.

[0021] Furthermore, the shell also has a third chamber and a fourth chamber, the third chamber is provided with an inlet, and the third chamber is connected to the first chamber through the second ventilation structure. The fourth chamber is provided with an outlet, and the fourth chamber is connected to the first chamber through the third ventilation structure. In this way, when the bacteria detection module is running, the air to be tested can enter the first chamber through the inlet and the second ventilation structure in turn, and be discharged to the external environment through the third ventilation structure and the outlet after the detection is completed. A guide member is provided in the fourth chamber, and the guide member is arranged at a position close to the third ventilation structure. The air flowing out through the third ventilation structure can be guided to the area in the fourth chamber away from the outlet through the guide member, so that the residence time of the air in the fourth chamber can be increased, so that the air to be tested flows through the first chamber at a relatively stable flow rate, and at the same time, it can also prevent the air flowing out of the first chamber from flowing back into the first chamber, thereby affecting the detection of the fluorescence detection member, thereby better ensuring the accuracy of the detection.

[0022] Furthermore, the bacteria detection module also includes a power supply module, which is arranged in the shell and is used to power the excitation light source and the fluorescence detection component. This can not only ensure the operation of the bacteria detection module, but also simplify the internal structure of the bacteria detection module and avoid the design and application of complex optical paths. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 This is a structural diagram of a bacteria detection module of an embodiment of the utility model;

[0025] Figure 2 This is an exploded view of a bacteria detection module according to an embodiment of the utility model (I);

[0026] Figure 3 This is a structural diagram of the second part of the bacteria detection module of one embodiment of the utility model;

[0027] Figure 4 This is an exploded view of a bacteria detection module according to an embodiment of the utility model (II);

[0028] Figure 5 This is an exploded view of a bacteria detection module according to an embodiment of the present utility model (III).

[0029] List of reference numerals:

[0030] 1. Shell; 11. First chamber; 111. Inlet; 12. Second chamber; 121. Common side wall; 122. First side wall; 123. Second side wall; 124. Third side wall; 125. First matte plate; 126. Second matte plate; 13. Third chamber; 14. Fourth chamber; 141. Outlet; 142. Guide member; 15. First through hole; 16. Second through hole; 17. Third through hole; 18. First part; 181. Annular boss; 19. Second part; 2. Excitation light source; 3. Fluorescence detection member; 4. Circuit board. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0032] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] At present, to detect the number of bacteria in the air, it is usually necessary to first use a specific sampler to take samples, and then culture the collected samples through a culture medium, and the culture usually takes several hours or days. After the culture is completed, the culture fluid is tested again, so that the number of bacterial colonies in the air can be detected. The entire detection process is time-consuming and usually needs to be carried out in a laboratory with detection qualifications, and cannot be widely used in the civilian market. To this end, the bacteria detection module of the utility model emits excitation light through an excitation light source to illuminate the air to be tested so that the microorganisms carried in the air to be tested emit fluorescence, and the fluorescence is detected by a fluorescence detection component, and the excitation light source and the fluorescence detection component are simultaneously arranged in the first chamber, so that there is no need to set up a complex optical path, and there is no need for sampling and culturing. The number of microorganisms carried in the air to be tested can be directly detected and determined, and can be widely used in various scenarios.

[0035] Refer to the following Figures 1 to 5 To illustrate possible implementations of the bacteria detection module of the present invention.

[0036] like Figures 1 to 5As shown, the bacteria detection module includes a housing 1, an excitation light source 2 and a fluorescence detection component 3, wherein the excitation light source 2 is configured to emit excitation light after being powered on, and the microorganisms carried in the air to be tested can be excited by the excitation light to emit fluorescence, and the fluorescence detection component 3 is configured to detect the fluorescence emitted by the microorganisms carried by the air to be tested after being irradiated with the excitation light, and output the detection result. This is because there are many types of microorganisms carried in the air to be tested, and various microorganisms usually have various fluorescent groups. Most microorganisms (especially bacteria) have roughly the same fluorescent groups, mainly composed of porphyrin, coenzyme, NADH and flavin. These fluorescent groups will produce fluorescence under the induction of the excitation light. However, due to the differences in the content of each fluorescent group, the structure of the microbial organism and the degree to which different microorganisms absorb laser energy, these differences will produce different fluorescence signals under the irradiation of the excitation light. The fluorescence detection component 3 finally determines the content of the microorganisms carried in the air to be tested by analyzing the fluorescence characteristics and the fluorescence signals. That is to say, when it is necessary to detect the number of microorganisms in the air to be tested, the air to be tested is irradiated with the excitation light emitted by the excitation light source 2, and then the fluorescence emitted by the microorganisms is detected by the fluorescence detection component 3, so that the number of microorganisms in the air to be tested can be obtained, without sampling and culturing, and the result can be obtained by directly testing. In addition, the housing 1 of the utility model has a first chamber 11, according to Figure 2 In the orientation shown, the first chamber 11 is roughly rectangular, and the excitation light source 2 and the fluorescence detection member 3 are arranged along the length direction of the first chamber 11 (roughly Figure 2 In other words, the excitation light source 2 and the fluorescence detection member 3 are arranged in the first chamber 11 in the irradiation direction of the excitation light (approximately Figure 2 In the direction from top to bottom in the figure, the fluorescence detection component 3 is arranged in sequence, and the fluorescence detection component 3 is arranged in the irradiation area of ​​the excitation light, so that when the air to be tested flows through the first chamber 11, under the irradiation of the excitation light, the microorganisms carried in the air to be tested will emit fluorescence, and the fluorescence detection component 3 in the irradiation area of ​​the excitation light can immediately detect the fluorescence, without setting a complicated light path, which simplifies the internal structure of the bacteria detection module, and can also perform a comprehensive detection of the fluorescence emitted in the first chamber 11, thereby ensuring the accuracy of the detection. In this way, it is only necessary to make the air to be tested flow through the first chamber, and the bacteria detection module with a relatively simple internal structure can quickly detect the content of microorganisms it carries, and obtain the final test results. It can be widely used in various scenarios, for example, household appliances such as air conditioners, refrigerators, washing machines, or other possible indoor spaces such as vehicles or conference rooms. Obviously, the excitation light source 2 and the fluorescence detection component 3 may not be arranged along the same direction. Figure 2The vertical direction in the figure is arranged in sequence, and the connecting line between the two and the vertical direction can have an angle less than 90°, as long as the fluorescence detection component 3 is arranged in the irradiation area of ​​the excitation light.

[0037] It should be noted that the fluorescence detection component 3 can be a photosensitive sensor, a photodetector, an ultraviolet sensor, a phototube, a photomultiplier tube, etc. Taking the fluorescence detection component 3 as a photosensitive sensor as an example, the photosensitive sensor can be a PN photodiode such as a silicon photodiode, or a PIN photodiode, an avalanche photodiode, a Schottky photodiode, and an MSM photodiode, etc. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific type of the fluorescence detection component 3 according to the specific application scenario, as long as it can accurately detect the received fluorescence.

[0038] Preferably, the fluorescence detection component 3 is a silicon photodiode. Using a silicon photodiode as the fluorescence detection component 3 can capture and detect fluorescence in a timely manner, and its cost is low, which can effectively reduce the overall cost of the bacteria detection module and is conducive to application promotion.

[0039] In a possible embodiment, the excitation light source 2 is a laser emitter or a laser, that is, a device capable of emitting laser light. In other words, the excitation light emitted by the excitation light source 2 is a laser, which has the characteristics of directional emission, extremely high brightness, and monochromaticity. The laser can excite the fluorescent groups in the microorganisms and generate fluorescence. It should be noted that the laser can be a helium-neon laser, a laser diode, etc. The utility model does not limit the specific type of the laser, as long as the laser can emit a laser capable of emitting fluorescence.

[0040] It should be noted that the excitation light source 2 can also be an ultraviolet lamp or LED lamp that can emit UVA ultraviolet rays. Obviously, the excitation light source 2 can also be a device that can emit excitation light containing a wavelength of 340nm to 405nm, that is, an excitation light containing a wavelength between 340nm and 405nm. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific type of excitation light source 2 according to the specific application scenario, as long as it can emit light that can excite microorganisms to emit fluorescence.

[0041] like Figures 1 to 5 As shown and in accordance with Figure 2 In the orientation shown, the housing 1 further comprises a second chamber 12, which is roughly rectangular and shares a side wall with the first chamber 11. The shared side wall 121 is provided with a first through hole 15 as a first ventilation structure, and the first through hole 15 is roughly a rectangular hole. The second chamber 12 is connected to the first chamber 11 through the first through hole 15. The second chamber 12 is irradiated along the direction of the excitation light (roughly Figure 2In the direction from top to bottom in the middle of the fluorescence detection member 3, the first through hole 15 is located on the downstream side of the fluorescence detection member 3 along the irradiation direction of the excitation light, and is at least partially aligned with the excitation light source 2. In this way, when the bacteria detection module is running, after the excitation light irradiates the air to be tested, the excess excitation light can directly enter the second chamber 12 through the first through hole 15. A light trap is formed in the second chamber 12, through which the excitation light entering the second chamber 12 can be absorbed and eliminated, eliminating light noise, avoiding interference with the fluorescence signal, and affecting the detection of the fluorescence detection member 3, so that the fluorescence signal emitted by the microorganisms carried in the air to be tested can be detected more accurately, and the accuracy of the detection can be improved. Obviously, the first through hole 15 can also be a hole of other possible shapes such as square, circular, elliptical, polygonal, etc. Obviously, the first chamber 11 and the second chamber 12 may not share a side wall. In this case, the first ventilation structure is roughly a hollow tubular structure connecting the first chamber 11 and the second chamber 12.

[0042] In a possible implementation, the inner wall of the second chamber 12 is coated with a light absorbing material, which can absorb and weaken the excitation light entering the second chamber 12. The light absorbing material can be a material that can absorb excitation light, such as black water-based paint, laser absorbing resin, carbon black, graphite, etc. It should be noted that the four inner walls of the second chamber 12 can be coated with the light absorbing material in their entirety or only partially.

[0043] like Figures 1 to 5 As shown and in accordance with Figure 2In the orientation shown, the second chamber 12 further includes a first side wall 122, a second side wall 123 and a third side wall 124, and a rectangular structure is formed by the common side wall 121, the first side wall 122, the second side wall 123 and the third side wall 124. The first side wall 122 is arranged opposite to the common side wall 121, the second side wall 123 and the third side wall 124 are arranged opposite to each other, and the two ends thereof are connected to the first side wall 122 and the common side wall 121 respectively. The second chamber 12 is provided with a first matte plate 125, which is a roughly rectangular plate-shaped structure, the first side of the first matte plate 125 is connected to the right side of the first through hole 15 on the common side wall 121, the second side of the first matte plate 125 is connected to the first side wall 122, and the first side of the first matte plate 125 is arranged opposite to the second side. There is an angle between the first matte plate 125 and the common side wall 121, and at least a portion of the first matte plate 125 is aligned with the first through hole 15. In this way, when the excess excitation light enters the second chamber 12 through the first through hole 15, it can also be incident on the second chamber 12 at a reasonable angle, and then irradiate the first matte plate 125 at a reasonable angle. Under the action of the first matte plate 125, this part of the light is reflected to other areas in the second chamber 12, and the reflected light will be attenuated and absorbed by the light-absorbing material coated in the second chamber 12. Obviously, the first matte plate 125 can also be a curved plate, an arc plate, a wavy plate or other possible shapes, as long as it can ensure that the excitation light can be reflected to other areas of the second chamber 12.

[0044] In a possible implementation, the angle between the first matte plate 125 and the common side wall 121 is 40° to 60°. In this case, the excitation light can be completely reflected by the first matte plate 125 to the inside of the second chamber 12, and will not be reflected to the first chamber 11, so that it can better avoid interfering with the detection of the fluorescent detection component 3 and ensure the accuracy of the detection of the bacteria detection module. Preferably, the angle between the first matte plate 125 and the common side wall 121 is 45°.

[0045] like Figures 1 to 5 As shown and in accordance with Figure 2In the orientation shown, a second matte plate 126 is also disposed in the second chamber 12. The second matte plate 126 is a roughly rectangular plate-shaped structure and is disposed on the side of the first matte plate 125 facing the first through hole 15, that is, on the left side of the first matte plate 125. The first side of the second matte plate 126 is connected to the left side of the first through hole 15 on the common side wall 121, and there is a gap between the second side of the second matte plate 126 and the first matte plate 125. The first side and the second side of the second matte plate 126 are disposed opposite to each other. In this way, after being reflected by the first matte plate 125, the excitation light is reflected to the side of the second matte plate 126 away from the first through hole 15, and then is reflected multiple times by the second side wall 123 of the second chamber 12, the second matte plate 126 and the first matte plate 125. The reflected light continues to attenuate and is absorbed by the coated light absorbing material until it is completely eliminated. Obviously, the second matte plate 126 may also be a curved plate, an arc-shaped plate, a wavy plate or other possible shapes, as long as it can reflect light and prevent the light entering the second chamber 12 from entering the first chamber 11 .

[0046] In a possible embodiment, the second matte plate 126 and the common side wall 121 also have an angle between them, and the angle between the two is 40° to 60°. In this case, after the excitation light is reflected by the first matte plate 125, the excitation light reflected into the second chamber 12 can be effectively blocked in the second chamber 12 to prevent it from being reflected into the first chamber 11, thereby better ensuring the accuracy of the bacteria detection module. Preferably, the angle between the second matte plate 126 and the common side wall 121 is 45°.

[0047] In a possible implementation, the first matte plate 125 and the second matte plate 126 are coated with the aforementioned light absorbing material, so that the first matte plate 125 and the second matte plate 126 can absorb the excitation light through the light absorbing material coated thereon while attenuating the excitation light through reflection, thereby absorbing and eliminating the excitation light more quickly. Obviously, only one of the first matte plate 125 and the second matte plate 126 can be coated with the light absorbing material, and of course, neither of the matte plates can be coated with the light absorbing material.

[0048] Based on the above-mentioned arrangement, a light trap is formed in the second chamber 12 by the first matt plate 125, the second matt plate 126 and the inner wall of the second chamber 12 coated with light-absorbing material. The excitation light entering the second chamber 12 is absorbed by the light trap, thereby eliminating the influence of this part of the light on the fluorescent detection component 3, thereby ensuring the accuracy of the detection of the bacteria detection module.

[0049] It should be noted that, in the second chamber 12, only the first matt plate 125 may be provided without the second matt plate 126, or only the second matt plate 126 may be provided without the first matt plate 125. Of course, in the second chamber 12, only the light-absorbing material may be coated, without the first matt plate 125 and the second matt plate 126. Obviously, in the second chamber 12, a light trap may be formed by providing a plurality of matt plates instead of coating the light-absorbing material. Without departing from the basic principles of the present application, those skilled in the art may flexibly select the specific method for forming the light trap in the second chamber 12 according to the specific application scenario, as long as a light trap can be formed in the second chamber 12 and the excitation light entering the second chamber 12 can be absorbed and eliminated.

[0050] like Figures 1 to 5 As shown and in accordance with Figure 2 In the orientation shown, the housing 1 also has a third chamber 13 and a fourth chamber 14, the third chamber 13 is located on the left side of the first chamber 11, and the fourth chamber 14 is located on the right side of the first chamber 11. The third chamber 13 shares a side wall with the first chamber 11, and a second through hole 16 is provided on the side wall. The second through hole 16 is substantially rectangular and is provided at a position of the first chamber 11 close to the second chamber 12. The third chamber 13 is connected to the first chamber 11 through the second through hole 16. The fourth chamber 14 shares a side wall with the first chamber 11, and a third through hole 17 is provided on the side wall. The third through hole 17 is substantially rectangular and is provided at a position of the first chamber 11 close to the second chamber 12. The fourth chamber 14 is connected to the first chamber 11 through the third through hole 17. Both the second through hole 16 and the third through hole 17 are substantially provided at a position corresponding to the fluorescence detection member 3, and the two are provided opposite to each other on the two side walls of the first chamber 11. The third chamber 13 is provided with an inlet 111, which is roughly rectangular and is located at a position of the third chamber 13 far from the second chamber 12. The air to be tested can enter the third chamber 13 through the inlet 111. The fourth chamber 14 is provided with an outlet 141, which includes a plurality of strip holes, and the three strip holes roughly form a shape similar to a louver hole. The outlet 141 is located at a position of the fourth chamber 14 far from the second chamber 12. In this way, when the bacteria detection module is running, the air to be tested passes through the inlet 111 (roughly located at the farthest point from the second chamber 12) which is far from the second chamber 12. Figure 2 The liquid enters the third chamber 13 and diffuses in the third chamber 13. Then, the liquid passes through the second through hole 16 (approximately located at the upper position of the middle chamber 12) which is closer to the second chamber 12. Figure 2The air to be tested enters the first chamber 11 from the lower middle position of the first chamber 11. After being irradiated by the excitation light in the first chamber 11, the microorganisms carried by the microorganisms emit fluorescence, and the fluorescence is captured and detected by the fluorescence detection component 3. The irradiated air enters the fourth chamber 14 through the third through hole 17, and then is discharged to the external environment through the outlet 141. In this process, after the air to be tested enters the third chamber 13 through the inlet 111, it will first fill the third chamber 13 and then enter the first chamber 11. Its flow rate will be slowed down. After the detected air enters the fourth chamber 14, it will also first fill the fourth chamber 14 and then be discharged through the outlet 141. In other words, the inlet 111 and the outlet 141 of the first chamber 11 are always filled with the air to be tested, so that the stability of the airflow flowing through the first chamber 11 can be ensured, that is, it can ensure that the air to be tested passes through the first chamber 11 at a relatively constant speed. Obviously, the first chamber 11 and the third chamber 13 may not share a side wall, and the first chamber 11 and the fourth chamber 14 may not share a side wall. In this case, the second ventilation structure is roughly a hollow tubular structure connecting the first chamber 11 and the third chamber 13, and the third ventilation structure is roughly a hollow tubular structure connecting the first chamber 11 and the fourth chamber 14.

[0051] It should be noted that the inlet 111 may not be set at the position of the third chamber 13 away from the second chamber 12, but may be set at other positions of the third chamber 13, for example, at the middle of the third chamber 13 along its length direction, etc. Obviously, the outlet 141 may not be set at the position of the fourth chamber 14 away from the second chamber 12, but may be set at other positions of the fourth chamber 14, for example, at the middle of the fourth chamber 14 along its length direction, etc. Among them, the length direction of the third chamber 13 and the fourth chamber 14 is approximately Figure 2 The vertical direction in .

[0052] Obviously, the second through hole 16 and the third through hole 17 may not be arranged opposite to each other, but the second through hole 16 and the third through hole 17 may be arranged staggered, or the second through hole 16 may be aligned with a part of the third through hole 17. Without departing from the basic principles of the present application, those skilled in the art may flexibly select the specific arrangement orientations of the second through hole 16 and the third through hole 17 according to specific application scenarios, as long as it can ensure that the air to be tested can pass through the first chamber 11 smoothly.

[0053] It should be noted that the housing 1 may not have the third chamber 13 or the fourth chamber 14. Of course, the housing 1 may only have the first chamber 11 and the second chamber 12, but not the third chamber 13 and the fourth chamber 14.

[0054] like Figures 1 to 5As shown, the housing 1 includes a first part 18 and a second part 19. The first part 18 is generally a box-shaped structure with an opening on one side, and a plurality of side walls are arranged therein, and the first part 18 is divided into four different areas by these side walls. The second part 19 is generally a plate-shaped structure matching the top of the first part 18. When the first part 18 and the second part 19 are fastened together, the bottom of the second part 19 abuts against the top of each side wall of the first part 18 arranged in the first part 18, thereby forming four chambers in the housing 1, namely, the first chamber 11, the second chamber 12, the third chamber 13 and the fourth chamber 14. Among them, the inlet 111 is arranged at the position of the second part 19 corresponding to the third chamber 13, and the outlet 141 is arranged at the bottom of the first part 18 corresponding to the fourth chamber 14, which is equivalent to setting the inlet 111 at the top of the third chamber 13 and the outlet 141 at the bottom of the fourth chamber 14.

[0055] It should be noted that the inlet 111 may not be arranged on the second portion 19, but may be arranged on the bottom of the first portion 18 corresponding to the third chamber 13, or on the two outer side walls of the first portion 18 corresponding to the third chamber 13 (for example, Figure 2 The outlet 141 may also be disposed not at the bottom of the first portion 18 corresponding to the fourth chamber 14, but at the position of the second portion 19 corresponding to the fourth chamber 14, or at the two outer side walls of the first portion 18 corresponding to the fourth chamber 14 (specifically, as shown in FIG. Figure 2 Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific locations of the inlet 111 and the outlet 141 according to specific application scenarios, as long as the air to be tested can enter the third chamber 13 through the inlet 111 and the air tested in the first chamber 11 can be discharged through the outlet 141.

[0056] like Figures 1 to 5As shown, a guide member 142 is also provided in the fourth chamber 14. The guide member 142 is provided in the fourth chamber 14 at a position close to the third through hole 17, and is generally a curved plate. The curved plate can guide the air to be tested coming out of the third through hole 17 to the area close to the second chamber 12 in the fourth chamber 14, and then detour to the area far away from the second chamber 12 in the fourth chamber 14, and then discharge through the outlet 141. Through the provision of the guide member 142, the air to be tested will not be discharged directly from the outlet 141 after flowing out of the third through hole 17, but will be discharged from the outlet 141 after detour in the fourth chamber 14, thus increasing the residence time of the air to be tested in the fourth chamber 14, so that the air to be tested flows through the first chamber 11 at a relatively stable speed, so that the amount of the air to be tested passing through the first chamber 11 per unit time is relatively constant, and the bacterial content detected by the fluorescent detection member 3 is relatively stable, so that the accuracy of the detection can be better ensured. Furthermore, the arrangement of the curved plate can prevent the air to be tested that has flowed out of the first chamber 11 from flowing back into the first chamber 11 , thereby affecting the detection of the fluorescence detection component 3 .

[0057] It should be noted that the flow guide member 142 can also be configured as a plate of other possible shapes such as an arc-shaped plate, a wavy plate, or surrounded by a plurality of flat plates. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific configuration of the flow guide member 142 according to the specific application scenario, as long as the flow guide member 142 can guide the air flowing out of the third through hole 17 to the area in the fourth chamber 14 away from the outlet 141, so that the air to be tested flows through the first chamber 11 at a relatively stable flow rate. Of course, the flow guide member 142 may not be provided in the fourth chamber 14.

[0058] like Figures 1 to 5 As shown, the bacteria detection module also includes a power supply module, which is a circuit board 4, which is roughly rectangular and connected to an external power supply to supply power to the excitation light source 2 and the fluorescence detection component 3. An annular boss 181 is formed on the top of the first part 18, and the circuit board 4 is adapted to the annular boss 181. When the circuit board 4 is placed in the housing 1, the portion of the circuit board 4 close to the outer edge abuts against the annular boss 181, so that at least a portion of the circuit board 4 is located in the first chamber 11. In the utility model, the excitation light source 2 and the fluorescence detection component 3 can be set on the circuit board 4 at a position corresponding to the first chamber 11 by means of on-board or plug-in, so that the circuit board 4, the excitation light source 2 and the fluorescence detection component 3 are integrated together, and the excitation light source 2 and the fluorescence detection component 3 are arranged along the first chamber 11. Figure 2The vertical direction shown in is set in the first chamber 11. This can not only ensure the operation of the bacteria detection module, but also simplify the internal structure of the bacteria detection module, and avoid the design and application of complex optical paths. In order to ensure that the air to be tested can enter the third chamber 13 through the inlet 111, the circuit board 4 is provided with a perforation at a position corresponding to the inlet 111, and the size of the perforation is similar to the inlet 111. During assembly, the excitation light source 2 and the fluorescence detection component 3 are aligned with the part of the first part 18 corresponding to the first chamber 11, the circuit board is buckled on the annular boss 181, and then the second part 19 is covered on the outside of the circuit board 4, that is, the assembly of the bacteria detection module is completed. Obviously, the excitation light source 2 and the fluorescence detection component 3 can also be electrically connected to the circuit board 4 in other ways. Obviously, the circuit board 4 can also be directly set in the first chamber 11. Of course, the power supply module can also be set in other ways, for example, the power supply module is a battery, a dry cell, etc., and those skilled in the art can flexibly design the specific setting mode of the power supply module, as long as it can power the excitation light source 2 and the fluorescence detection component 3.

[0059] In summary, in the preferred technical solution of the utility model, by setting the excitation light source 2 and the fluorescence detection component 3, and setting the excitation light source 2 and the fluorescence detection component 3 in the first chamber 11, it is possible to accurately detect the content of microorganisms in the air to be tested without sampling, culturing, or setting a complex optical path, which is simple, fast, time-saving, and can be widely used in various scenarios. By setting a light trap in the second chamber 12 connected to the first chamber 11, the light trap can absorb and eliminate the excess excitation light generated by the excitation light source 2 in the first chamber 11, thereby ensuring the accuracy of the detection of the bacteria detection module. By setting the inlet 111 on the third chamber 13, the outlet 141 on the fourth chamber 14, and the flow guide component 142 in the fourth chamber 14, the air to be tested can flow through the first chamber 11 at a relatively stable flow rate, thereby better ensuring the accuracy of the detection of the bacteria detection module.

[0060] Of course, the above-mentioned replaceable implementations, as well as the replaceable implementations and the preferred implementations, can be used in a cross-coordinated manner to combine new implementations to suit more specific application scenarios.

[0061] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims of the present invention, any one of the claimed embodiments may be used in any combination.

[0062] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A bacteria detection module, characterized in that: The bacteria detection module includes a shell, an excitation light source and a fluorescence detection component. The shell has a first chamber. The excitation light source and the fluorescence detection component are arranged in the first chamber. The excitation light source is configured to emit excitation light after being powered on. The excitation light can excite microorganisms carried in the air to be tested to emit fluorescence. The fluorescence detection component is configured to detect the fluorescence emitted by the microorganisms carried in the air to be tested after the air to be tested is irradiated with the excitation light after being powered on, and output the detection result.

2. The bacteria detection module according to claim 1, characterized in that: The shell also has a second chamber, which is connected to the first chamber and is arranged on the downstream side of the fluorescence detection component along the irradiation direction of the excitation light. A light trap is formed in the second chamber, and the light trap is configured to eliminate the light from the first chamber.

3. The bacteria detection module according to claim 2, characterized in that: At least a portion of the inner wall of the second chamber is coated with a light absorbing material to form the light trap.

4. The bacteria detection module according to claim 3, characterized in that: The second chamber and the first chamber share a side wall, a first ventilation structure is disposed on the shared side wall, and the second chamber and the first chamber are connected to each other through the first ventilation structure. A first matte plate is arranged in the second chamber, one side of the first matte plate is connected to the common side wall located on the first side of the first ventilation structure, the first matte plate and the common side wall have an angle, and at least a portion of the first matte plate is aligned with the first ventilation structure.

5. The bacteria detection module according to claim 4, characterized in that: A second matte plate is also provided in the second chamber, and the second matte plate is provided on the side of the first matte plate facing the first ventilation structure, the first side edge of the second matte plate is connected to the common side wall located on the second side of the first ventilation structure, and there is a distance between the second side edge of the second matte plate which is arranged opposite to the first side edge and the first matte plate.

6. The bacteria detection module according to any one of claims 1 to 5, characterized in that: The shell also has a third chamber, a second ventilation structure is arranged between the third chamber and the first chamber, the third chamber is connected with the first chamber through the second ventilation structure, and the third chamber is provided with an inlet, and the air to be tested can enter the third chamber through the inlet and then enter the first chamber through the second ventilation structure.

7. The bacteria detection module according to claim 6, characterized in that: The first chamber is also provided with a third ventilation structure, and the third ventilation structure is communicated with the external environment so as to allow the air to be tested that enters the first chamber through the second ventilation structure to be discharged to the external environment through the third ventilation structure.

8. The bacteria detection module according to claim 7, characterized in that: The shell further has a fourth chamber, the fourth chamber is communicated with the first chamber through the third ventilation structure, the fourth chamber is provided with an outlet, and the fourth chamber is communicated with the external environment through the outlet.

9. The bacteria detection module according to claim 8, characterized in that: The fourth chamber is provided with a flow guiding member, the flow guiding member is arranged at a position close to the third ventilation structure, and the flow guiding member is arranged to guide the air flowing out through the third ventilation structure to an area in the fourth chamber away from the outlet.

10. The bacteria detection module according to any one of claims 1 to 5, characterized in that: The bacteria detection module further comprises a power supply module, which is disposed in the housing and is electrically connected to the excitation light source and the fluorescence detection component, respectively.

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