Floating bacterium particle counting sensor

Abstract

The utility model relates to the technical field of planktonic bacteria detection equipment, in particular to a planktonic bacteria particle counting sensor, which comprises a biological particle counter, a dust particle counter, an air inlet pipe, an exhaust pipe and a connecting pipe, the other end is communicated with air extraction equipment; one end of the air inlet pipe is detachably arranged on an air inlet of the dust particle counter; according to the utility model, negative pressure is generated in the air inlet pipe through the suction equipment, so that air in a detection site is sucked into the air inlet pipe, sequentially passes through the dust particle counter, the connecting pipe and the biological particle counter and then reaches the exhaust pipe, and in the process, the dust particle counter is used for detecting the number of dust particles; then the biological particle counter is used for detecting the number of the planktonic bacteria, culture is not needed in the detection process, real-time measurement can be carried out on site, and the detection convenience is good.

Description

Technical Field

[0001] The utility model relates to the technical field of airborne bacteria detection equipment, in particular to an airborne bacteria particle counting sensor. Background Art

[0002] Airborne bacteria detection is a method for evaluating the quantity and types of microorganisms (such as bacteria, fungal spores, etc.) suspended in the air in the environment. This kind of detection is usually applied to occasions where air quality needs to be controlled, such as pharmaceutical factories, hospital operating rooms, dust-free workshops, and other environments that need to maintain a high cleanliness level.

[0003] Most of the existing products on the market use the culture method to detect and count airborne bacteria. For example, a method for counting airborne bacteria disclosed in CN116287098A requires steps such as sampling, culturing, and detecting during the process. The detection period is relatively long, and the culturing process needs to be carried out in a laboratory and cannot be measured in real time on site, resulting in insufficient detection convenience. Content of the Utility Model

[0004] In view of this, the utility model provides an airborne bacteria particle counting sensor, which forms a negative pressure in the intake pipe through a suction device, so that the air in the detection site is sucked into the intake pipe, and then passes through a dust particle counter, a connecting pipe, and a biological particle counter in sequence and reaches the exhaust pipe. During this process, the number of dust particles is detected by the dust particle counter, and then the number of airborne bacteria is detected by the biological particle counter. The detection process does not require culturing and can be measured in real time on site, with better detection convenience.

[0005] The technical solution of the utility model is realized as follows:

[0006] The utility model provides an airborne bacteria particle counting sensor, which includes a biological particle counter, and also includes a dust particle counter, an intake pipe, an exhaust pipe, and a connecting pipe. Among them,

[0007] One end of the exhaust pipe is detachably arranged on the exhaust port of the biological particle counter, and the other end is used to communicate with a suction device;

[0008] One end of the intake pipe is detachably arranged on the intake port of the dust particle counter;

[0009] One end of the connecting pipe is detachably arranged on the exhaust port of the dust particle counter, and the other end is detachably arranged on the intake port of the biological particle counter.

[0010] Based on the above technical solutions, preferably, the exhaust port and intake port of the dust particle counter are provided with first external threads, and the adjacent ends of the connecting pipe and the intake pipe are provided with first internal threads. Among them,

[0011] The first external thread and the first internal thread mesh with each other.

[0012] Based on the above technical solution, preferably, the dust particle counter includes a housing, a laser emitter, a mirror, and a signal receiver, wherein,

[0013] A circular hole-shaped photosensitive cavity is provided inside the housing;

[0014] An air inlet channel and an air outlet channel are provided on the side of the photosensitive cavity. The air inlet channel and the air outlet channel are centrosymmetric. The air inlet channel is communicated with the air inlet pipe, and the air outlet channel is communicated with the connecting pipe;

[0015] A laser channel and an extinction channel are provided on the side of the photosensitive cavity. The laser channel and the extinction channel are centrosymmetric, and the laser channel and the air inlet channel are staggered;

[0016] The laser emitter is fixed in the laser channel;

[0017] The mirror is arranged at one end of the photosensitive cavity and is fixedly arranged relative to the photosensitive cavity, and the signal receiver is fixed at the other end of the photosensitive cavity.

[0018] Based on the above technical solution, preferably, two laser channels are provided on both sides of the air outlet channel, and two extinction channels are provided on both sides of the air inlet channel, wherein,

[0019] The two laser channels and the two extinction channels correspond to each other one by one;

[0020] One laser emitter is arranged in each laser channel.

[0021] Based on the above technical solution, preferably, the laser channel is in the shape of a through hole, and the extinction channel is in the shape of a counterbore.

[0022] Based on the above technical solution, preferably, the included angle between the laser channel and the air outlet channel is 45 degrees.

[0023] Based on the above technical solution, preferably, the laser channel is perpendicular to the side of the photosensitive cavity, and the air inlet channel is perpendicular to the side of the photosensitive cavity.

[0024] Based on the above technical solution, preferably, the dust particle counter further includes an end cap, wherein,

[0025] One end of the photosensitive cavity away from the signal receiver is open, and the end cap is buckled on the open end of the photosensitive cavity and fixed to the housing by bolts;

[0026] The mirror is fixed on the end cap.

[0027] Based on the above technical solutions, preferably, second external threads are provided on the exhaust port and the intake port of the bioparticle counter, and second internal threads are provided on the adjacent ends of the connecting pipe and the exhaust pipe, wherein,

[0028] The second external thread meshes with the second internal thread.

[0029] Based on the above technical solutions, preferably, both the intake pipe and the exhaust pipe are L-shaped tubes.

[0030] A floating bacteria particle counting sensor of the present utility model has the following beneficial effects compared with the prior art:

[0031] (1) By setting a suction device to form a negative pressure in the intake pipe, the air in the detection site is sucked into the intake pipe, and then passes through the dust particle counter, the connecting pipe, and the bioparticle counter in sequence and reaches the exhaust pipe. During the process, the dust particle counter detects the number of dust particles, and then the bioparticle counter detects the number of floating bacteria. The detection process does not require culturing and can be measured in real time on site, and the detection convenience is better.

[0032] (2) By setting the intake pipe, the exhaust pipe, and the connecting pipe to be detachable, it is convenient to disassemble the dust particle counter and the bioparticle counter, which is convenient for carrying and moving and is convenient for use in different sites.

[0033] (3) By setting two laser channels, it is convenient to generate two intersecting laser beams to improve the effect of irradiating the sampling air flow, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 Is a perspective view of a floating bacteria particle counting sensor of the present utility model;

[0036] Figure 2 Is a partial side view of a floating bacteria particle counting sensor of the present utility model;

[0037] Figure 3 Is a sectional view taken along the line A-A of the present utility model;

[0038] Figure 4 It is a sectional view taken along the line B-B of the present utility model;

[0039] Figure 5 It is a partial perspective view of the dust particle counter of the present utility model;

[0040] Figure 6 It is a perspective view of the intake pipe of the present utility model;

[0041] Figure 7 It is a longitudinal sectional view of the connecting pipe of the present utility model;

[0042] Figure 8 It is a front view of the biological particle counter of the present utility model;

[0043] Figure 9 It is a perspective view of the exhaust pipe of the present utility model;

[0044] In the figure: 1. Biological particle counter; 2. Dust particle counter; 3. Intake pipe; 4. Exhaust pipe; 5. Connecting pipe; 21. Outer shell; 22. Laser emitter; 23. Reflecting mirror; 24. Signal receiver; 25. End cover; 101. Second external thread; 201. First external thread; 202. Photosensitive cavity; 203. Intake channel; 204. Exhaust channel; 205. Laser channel; 206. Extinction channel; 501. First internal thread; 502. Second internal thread. Specific embodiments

[0045] Next, in combination with the specific embodiments of the present utility model, the technical solutions in the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0046] As Figures 1-9 shown, a floating bacteria particle counting sensor of the present utility model includes a biological particle counter 1, a dust particle counter 2, an intake pipe 3, an exhaust pipe 4, and a connecting pipe 5.

[0047] Among them, the exhaust pipe 4 is an L-shaped pipe, one end of which is detachably arranged on the exhaust port of the biological particle counter 1, and the other end is used to communicate with a pumping device, and the pumping device can be any one of the existing pumping pumps.

[0048] The intake pipe 3 is an L-shaped pipe, one end of which is detachably arranged on the intake port of the dust particle counter 2, one end of the connecting pipe 5 is detachably arranged on the exhaust port of the dust particle counter 2, and the other end is detachably arranged on the intake port of the biological particle counter 1.

[0049] When the suction device is working, a negative pressure is generated in the intake pipe 3, which causes the air in the detection site to be sucked into the intake pipe 3. Then, it passes through the dust particle counter 2, the connecting pipe 5, and the viable particle counter 1 in sequence and reaches the exhaust pipe 4. During this process, the number of dust particles is detected by the dust particle counter 2, and then the number of airborne bacteria is detected by the viable particle counter 1. The detection process does not require culturing and can be measured in real time on site, with good detection convenience.

[0050] The above-mentioned viable particle counter 1 is any one in the prior art, such as a real-time microbial particle counter disclosed in CN203908913U. Its air inlet nozzle is equivalent to the air inlet of the viable particle counter 1 in this embodiment, and its air outlet nozzle is equivalent to the air outlet of the viable particle counter 1 in this embodiment. The sampling air flow enters the viable particle counter 1 from the air inlet of the viable particle counter 1 for detection. The specific detection principle and specific structure can be obtained in the prior art and will not be elaborated in this embodiment.

[0051] The above-mentioned dust particle counter 2 includes a housing 21, a laser emitter 22, a reflector 23, and a signal receiver 24. Among them, as Figures 2-4 shown, a circular hole-shaped photosensitive cavity 202 is provided inside the housing 21. An air inlet channel 203 and an air exhaust channel 204 are provided on the side of the photosensitive cavity 202. The air inlet channel 203 and the air exhaust channel 204 are centrosymmetric. The air inlet channel 203 is communicated with the intake pipe 3, and the air exhaust channel 204 is communicated with the connecting pipe 5. A through-hole-shaped laser channel 205 and a counterbore-shaped extinction channel 206 are also provided on the side of the photosensitive cavity 202. The positions of the laser channel 205 and the extinction channel 206 are centrosymmetrically arranged, and the laser channel 205 and the air inlet channel 203 are staggered.

[0052] The laser emitter 22 is fixed in the laser channel 205. The reflector 23 is arranged at one end of the photosensitive cavity 202 and is fixedly arranged relative to the photosensitive cavity 202. The signal receiver 24 is fixed at the other end of the photosensitive cavity 202. The laser emitter 22 is used to emit a laser beam into the photosensitive cavity 202, and the laser beam finally falls into the extinction channel 206.

[0053] When the sampling air flow enters the photosensitive cavity 202 from the air inlet channel 203 and is irradiated by the laser beam, light scattering occurs. The signal receiver 24 receives the scattered light and processes it. Among them, the signal receiver 24 is a silicon photodiode, and its principle is in the prior art, such as the optical path system of a particle counting sensor disclosed in CN218445045U, which will not be elaborated in this embodiment.

[0054] Since the air flow at the scene is collected by means of negative pressure suction, the sampling air flow is relatively large. Therefore, a single optical path cannot meet the test requirements. Because some particles will bypass from one side of the laser beam, resulting in inaccurate measurement results. To solve this problem, the above-mentioned dust particle counter 2 is provided with two optical paths. Specifically, as Figure 3 shown, two laser channels 205 are provided on both sides of the exhaust channel 204, and two extinction channels 206 are provided on both sides of the intake channel 203. Among them, the two laser channels 205 correspond to the two extinction channels 206 one by one; a laser emitter 22 is arranged in each laser channel 205. In addition, the included angle between the laser channel 205 and the exhaust channel 204 is 45 degrees. The laser channel 205 is perpendicular to the side of the photosensitive cavity 202, and the intake channel 203 is perpendicular to the side of the photosensitive cavity 202.

[0055] The laser beams emitted by the above two optical paths cross inside the photosensitive cavity 202 and irradiate the sampling air flow from both sides, with a better irradiation effect, thereby improving the accuracy of particle measurement.

[0056] At the same time, to facilitate the internal cleaning of the photosensitive cavity 202, the dust particle counter 2 further includes an end cover 25. Among them, as Figure 5 shown, one end of the photosensitive cavity 202 away from the signal receiver 24 is open. The end cover 25 is buckled on the open end of the photosensitive cavity 202 and fixed to the outer shell 21 by bolts. The mirror 23 is fixed on the end cover 25. When the photosensitive cavity 202 needs to be cleaned, the end cover 25 is opened. After cleaning, the end cover 25 is reinstalled in place. Further, a gasket is provided between the end cover 25 and the outer shell 21 to prevent air leakage during testing.

[0057] In addition, in this floating bacteria particle counting sensor, the intake pipe 3, the exhaust pipe 4 and the connecting pipe 5 are designed to be detachable, so it is convenient to disassemble the dust particle counter 2 and the biological particle counter 1, which is convenient to carry and move and is convenient to use at different sites. Specifically, as Figures 5-9 shown, first external threads 201 are provided on the exhaust port and the intake port of the dust particle counter 2. First internal threads 501 are provided on the adjacent ends of the connecting pipe 5 and the intake pipe 3. Second external threads 101 are provided on the exhaust port and the intake port of the biological particle counter 1. Second internal threads 502 are provided on the adjacent ends of the connecting pipe 5 and the exhaust pipe 4. Among them, the second external thread 101 and the second internal thread 502 are meshed with each other, and the first external thread 201 and the first internal thread 501 are meshed with each other.

[0058] In the above structure, the installation and disassembly of the intake pipe 3, the exhaust pipe 4 and the connecting pipe 5 are realized by means of thread meshing, which is relatively convenient.

[0059] The usage method of a floating bacteria particle counting sensor of the present utility model is as follows:

[0060] First, when the suction device is working, a negative pressure is generated in the intake pipe 3, thereby causing the air in the detection site to be sucked into the intake pipe 3, and then successively passing through the dust particle counter 2, the connecting pipe 5, and the viable particle counter 1 and reaching the exhaust pipe 4. During this process, the number of dust particles is detected by the dust particle counter 2, and then the number of viable bacteria is detected by the viable particle counter 1. After the detection is completed, the intake pipe 3, the exhaust pipe 4, and the connecting pipe 5 can be disassembled, thereby facilitating the storage of this viable particle counting sensor and facilitating the detection at the next location.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A floating bacteria particle counting sensor, comprising a biological particle counter (1), characterized in that: It also includes a dust particle counter (2), an intake pipe (3), an exhaust pipe (4) and a connecting pipe (5). Among them, One end of the exhaust pipe (4) is detachably arranged on the exhaust port of the biological particle counter (1), and the other end is used to communicate with an air extraction device; One end of the intake pipe (3) is detachably arranged on the intake port of the dust particle counter (2); One end of the connecting pipe (5) is detachably arranged on the exhaust port of the dust particle counter (2), and the other end is detachably arranged on the intake port of the biological particle counter (1).

2. The airborne bacteria particle counting sensor according to claim 1, wherein: First external threads (201) are arranged on the exhaust port and the intake port of the dust particle counter (2), and first internal threads (501) are arranged on the adjacent ends of the connecting pipe (5) and the intake pipe (3). Among them, The first external thread (201) and the first internal thread (501) are meshed with each other.

3. The airborne bacteria particle counting sensor according to claim 1, characterized in that: The dust particle counter (2) includes a housing (21), a laser emitter (22), a reflector (23) and a signal receiver (24). Among them, A circular hole-shaped photosensitive cavity (202) is arranged inside the housing (21); An intake channel (203) and an exhaust channel (204) are arranged on the side of the photosensitive cavity (202). The intake channel (203) and the exhaust channel (204) are centrosymmetric. The intake channel (203) communicates with the intake pipe (3), and the exhaust channel (204) communicates with the connecting pipe (5); A laser channel (205) and an extinction channel (206) are arranged on the side of the photosensitive cavity (202). The laser channel (205) and the extinction channel (206) are centrosymmetric, and the laser channel (205) and the intake channel (203) are staggered; The laser emitter (22) is fixed in the laser channel (205); The reflector (23) is arranged at one end of the photosensitive cavity (202) and is fixedly arranged relative to the photosensitive cavity (202). The signal receiver (24) is fixed at the other end of the photosensitive cavity (202).

4. The airborne bacteria particle counting sensor according to claim 3, wherein: Two laser channels (205) are arranged on both sides of the exhaust channel (204), and two extinction channels (206) are arranged on both sides of the intake channel (203). Among them, The two laser channels (205) and the two extinction channels (206) correspond to each other one by one; One laser emitter (22) is arranged in each laser channel (205).

5. The airborne bacteria particle counting sensor according to claim 4, wherein: The laser channel (205) is in the shape of a through hole, and the extinction channel (206) is in the shape of a counterbore.

6. The airborne microbe particle counting sensor according to claim 5, characterized in that: The included angle between the laser channel (205) and the exhaust channel (204) is 45 degrees.

7. The airborne bacteria particle counting sensor according to claim 6, wherein: The laser channel (205) is perpendicular to the side of the photosensitive cavity (202), and the intake channel (203) is perpendicular to the side of the photosensitive cavity (202).

8. The airborne bacteria particle counting sensor according to claim 7, wherein: The dust particle counter (2) also includes an end cap (25). Among them, One end of the photosensitive cavity (202) away from the signal receiver (24) is open, and the end cap (25) is buckled on the open end of the photosensitive cavity (202) and fixed on the outer shell (21) by bolts; The mirror (23) is fixed on the end cap (25).

9. The airborne microbe particle counting sensor according to claim 8, wherein: Second external threads (101) are provided on the exhaust port and the intake port of the biological particle counter (1), and second internal threads (502) are provided on the adjacent ends of the connecting pipe (5) and the exhaust pipe (4), wherein, The second external threads (101) and the second internal threads (502) are engaged with each other.

10. A floating bacteria particle counting sensor according to claim 1, characterized in that: Both the intake pipe (3) and the exhaust pipe (4) are L-shaped tubes.

Images