An on-line bacterial detection device for a low-temperature and high-humidity thawing device

Abstract

The present invention discloses an on-line bacterial detection device for a low-temperature and high-humidity thawing device, which relates to the technical field of bacterial detection. The on-line bacterial detection device includes a housing, a diversion component, an enrichment component, a detection component and a power fan blade. A gas flow channel is provided inside the housing. The enrichment component, the detection component and the power fan blade are arranged in the gas flow channel in sequence along the gas flow direction. The diversion component is fixedly connected to the housing, the enrichment component is fixedly connected to the housing, the detection component is fixedly connected to the housing, and the power fan blade is rotatably connected to the housing. When performing bacterial detection, the diversion component is sleeved on the frozen product to be detected, and the power fan blade is started. If bacteria grow on the frozen product, the bacteria will be carried by the air flow along the gas flow channel through the enrichment component. The enrichment component can enrich the bacteria in the air flow and finally enter the detection component for detection. The detection component is used to detect the bacterial content in the air flow, so as to judge whether the bacteria on the frozen product exceed the standard during the thawing process.

Description

Technical Field

[0001] The present invention relates to the technical field of bacterial detection, and specifically to an on-line bacterial detection device for a low-temperature and high-humidity thawing device. Background Art

[0002] Low-temperature and high-humidity thawing devices are widely used in the thawing of foods such as livestock (pigs, cows, sheep) meats, poultry meats, and aquatic products. They can also be applied to various fields such as freezing of meat products and aquatic products, and preservation of fruits and vegetables. It can be said that they have the function of multi-purpose in one. Low-temperature and high-humidity thawing devices use low-temperature and high-humidity circulating air flow to pass through the surface of frozen products to thaw them slowly under a relatively small temperature difference state, with very little loss of juice, and the color of the frozen products is relatively fresh. By controlling the humidity, temperature, wind speed, and wind direction of the air, the thawing requirements are met (the humidity requirement is 90% - 98%). High humidity is beneficial to reducing the outflow of juice during meat thawing. The wind speed is variable frequency speed regulation, the temperature changes in a curve, and the humidity is controlled by a sensor. The frozen meat is thawed directly by low-pressure steam. The steam pipeline directly enters the thawing room and is distributed inside the air supply fan, and is ejected from very fine small holes. During the thawing process, the variable frequency fan supplies air and sucks air to ensure the gas circulation flow in the thawing room. The air supply channels are on both sides of the top of the thawing room and are sent out from adjustable air outlets to ensure the air supply pressure. At the same time, the air supply wind power drives the steam to become a mist and circulates. Thawing means that the cooling fan supplies air and sucks air to drive the hot steam to circulate in the thawing room, so as to achieve the effect of thawing the frozen meat.

[0003] However, during the thawing process, due to the high humidity, bacteria are likely to grow on the surface of the frozen products, making the hygienic safety during the thawing process unable to be guaranteed. It is necessary to conduct on-line detection of the bacterial distribution on the surface of the frozen products for subsequent sterilization. In addition, during the thawing process, the misty steam circulates around the frozen products. Under the obstruction of the steam, conventional bacterial detection means are difficult to accurately detect the bacterial distribution. Summary of the Invention

[0004] The purpose of the present invention is to provide an on-line bacterial detection device for a low-temperature and high-humidity thawing device to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: The on-line bacterial detection device includes a housing, a diversion component, an enrichment component, a detection component, and a power fan blade. A gas flow channel is provided inside the housing. The enrichment component, the detection component, and the power fan blade are arranged in the gas flow channel in sequence along the gas flow direction. The diversion component is fixedly connected to the housing, the enrichment component is fixedly connected to the housing, the detection component is fixedly connected to the housing, and the power fan blade is rotatably connected to the housing.

[0006] The on-line bacterial detection device of the present invention is installed in the thawing device. When detection is required, the on-line bacterial detection device is moved to the position to be detected through a corresponding moving module. The moving module can be a multi-axis platform, etc. This is the prior art and will not be elaborated here. The housing is used to provide protection for each component. When performing bacterial detection, the diversion component is sleeved on the frozen product to be detected. The power fan blade is started to form a negative pressure in the gas flow channel, and the air around the frozen product is adsorbed by using the pressure difference. If bacteria grow on the frozen product, the bacteria will be carried by the air flow along the gas flow channel through the enrichment component. The enrichment component can enrich the bacteria in the air flow for subsequent detection, and finally enter the detection component for detection. The detection component is used to detect the bacterial content in the air flow, so as to judge whether the bacteria on the frozen product exceed the standard during the thawing process.

[0007] Further, the diversion component includes a first semi-circle and a second semi-circle. The first semi-circle and the second semi-circle are eccentrically arranged, and an air flow channel is provided between the first semi-circle and the second semi-circle.

[0008] The annular space formed by the eccentrically arranged first semi-circle and second semi-circle can surround the frozen product. This annular space is communicated with the gas flow channel. Under the action of the power fan blade, a negative pressure is formed in the gas flow channel, so that the annular space is a low-pressure area. Under the action of the pressure difference, the air flow will tangentially flow into the annular space through the air flow channel between the first semi-circle and the second semi-circle and flow along the walls of the first semi-circle and the second semi-circle, thus forming a spiral air flow, so as to suck the bacteria growing on the frozen product into the gas flow channel for subsequent detection; and the annular space is at low pressure and the outside is at high pressure area. Under the action of the internal and external pressure difference, the bacteria on the frozen product will not escape outward, avoiding the outward diffusion of bacteria during detection.

[0009] Further, a first spiral groove is provided on the first semi-circle, and a second spiral groove is provided on the second semi-circle. The first spiral groove and the second spiral groove are used to guide the air flow.

[0010] The spiral air flow formed in the annular space composed of the first semi-circle and the second semi-circle is formed under the action of the internal and external pressure difference and the wall guiding of the first semi-circle and the second semi-circle. In order to improve the guiding effect of the wall surface, the air flow is further guided through the first spiral groove and the second spiral groove, so as to improve the stability of the spiral air flow for subsequent bacterial enrichment.

[0011] Further, a contraction section is provided at one end of the gas flow channel close to the diversion component. The cross-section of the contraction section is conical. The enrichment component includes a diversion block. The diversion block is coaxial with the gas flow channel, and a diversion channel is provided in the diversion block. The diversion channel is communicated with the gas flow channel.

[0012] When the low-temperature and high-humidity thawing equipment thaws, it thaws frozen products through low-temperature steam. Bacteria are small in volume and easily adsorbed onto small droplets in the steam. Therefore, a large number of bacteria are enriched on the small droplets. Driven by the spiral airflow, the small droplets enter the contraction section at a certain speed. The spiraling small droplets are affected by centrifugal force and thus distributed on the outer ring of the contraction section. As the diameter of the contraction section gradually decreases, the centrifugal force on the small droplets gradually increases. Under the action of the centrifugal force, the small droplets tend to be further distributed on the outer ring of the contraction section, thereby enriching the small droplets in the steam, that is, enriching the bacteria adsorbed on the small droplets. The airflow enriched with bacteria flows towards the detection component under the guidance of the diversion block, and the air with fewer bacteria located in the inner ring of the contraction section flows out from the diversion channel.

[0013] Furthermore, the diversion block is provided with a conical head. A guiding ring is arranged circumferentially on the conical head. The guiding ring is fixedly connected to the inner wall of the gas flow channel. The guiding ring is provided with an inclined surface, and the inclination angle of the inclined surface matches that of the conical head. A charged ring is sleeved on the conical head, and the charged ring releases negative charges. An electrode plate is arranged on one side of the gas flow channel close to the guiding ring, and the electrode plate is negatively charged.

[0014] After the airflow enriched with bacteria passes through the diversion block and flows through the conical head, under the guiding action of the inclined surface on the guiding ring and the conical head, it will converge into the center of the gas flow channel. And the small droplets in the airflow will be negatively charged by the charged ring. In this way, when the negatively charged small droplets pass through the electrode plate, due to the principle of like charges repelling each other, they will tend to be distributed in the center of the gas flow channel, thus preventing the droplets enriched with bacteria from escaping and stabilizing them in the center of the gas flow channel, which is convenient for subsequent detection.

[0015] Furthermore, a connecting flow channel, an annular flow channel, and an air outlet flow channel are arranged inside the housing. One end of the connecting flow channel is communicated with the diversion channel, the other end of the connecting flow channel is communicated with the annular flow channel, and the air outlet flow channel is communicated with the annular flow channel. A plurality of air outlet flow channels are arranged circumferentially along the annular flow channel. The air outlet ends of the plurality of air outlet flow channels penetrate through the electrode plate and face the gas flow channel, and the plurality of air outlet flow channels are arranged obliquely.

[0016] The connecting flow channel is used to connect the diversion channel and the annular flow channel. After the airflow is guided by the contraction section, the airflow distributed in the inner ring of the contraction section will flow into the connecting flow channel and the annular flow channel in sequence along the diversion channel, and under the guiding action of the obliquely arranged air outlet flow channels, it enters the outer ring of the gas flow channel in a spiral flow state. And the spiral airflow plays a constraining role on the airflow enriched with bacteria in the center of the gas flow channel, further preventing the airflow enriched with bacteria from escaping outward, thus ensuring the enrichment effect of bacteria.

[0017] Furthermore, the inclination directions of the plurality of air outlet flow channels are the same as the helix directions of the first spiral groove and the second spiral groove.

[0018] Under the guiding action of the first spiral groove and the second spiral groove, the air flow enters the gas flow channel in a spiral motion state. When the spiral flowing air flow passes through the electrode plate, in order to prevent the spiral air flow formed under the guiding action of the air outlet channel from dispersing the air flow enriched with bacteria flowing in the inner circle spiral, by making the inclination directions of several air outlet channels the same as the spiral directions of the first spiral groove and the second spiral groove, the flowing direction of the constrained spiral air flow is made the same as that of the air flow enriched with bacteria flowing in the inner circle spiral.

[0019] Furthermore, an electric heating wire is wound around the connecting channel.

[0020] Bacteria are enriched on the small liquid droplets in the air flow, and the liquid droplets will affect the subsequent detection. By winding an electric heating wire around the connecting channel, the constrained air flow flowing out from several air outlet channels carries heat. Using heat transfer, the small liquid droplets enriched with bacteria are evaporated, so that the air flow enriched with bacteria enters the detection component in a dry state, thereby improving the accuracy of the subsequent detection.

[0021] Furthermore, the detection component includes a protective shell. An air inlet and an air outlet are provided on the protective shell. The air inlet faces the enrichment component, and the air outlet faces the power fan blade. An excitation light source and a fluorescence detection element are provided inside the protective shell.

[0022] The detection component is arranged at the center of the gas flow channel. In this way, the air flow enriched with bacteria at the center of the gas flow channel will flow into the fluorescence detection element inside the protective shell along the air inlet, which is convenient for detection. The excitation light source is set to be able to emit excitation light after being powered on, and this excitation light can excite bacteria to produce fluorescence. The fluorescence detection element is configured to be able to detect the fluorescence emitted by bacteria 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 produced under the induction of the excitation light. That is to say, when it is necessary to detect the number of microorganisms in a test target, for example, to detect the microbial content in the air, the test target is irradiated with the excitation light emitted by the excitation light source, and then the fluorescence emitted by the bacteria carried in the test target is detected by the fluorescence detection element, and the number of bacteria can be judged. The detected gas flows out through the air outlet, and a corresponding sterilization component, such as an ultraviolet germicidal lamp, etc., can be set at the air outlet to prevent the detected bacteria from spreading to other positions.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The annular space formed by the eccentrically arranged first semi-circle and second semi-circle can surround the frozen product. This annular space is connected to the gas flow channel, and under the action of the power fan blade, a negative pressure is formed in the gas flow channel, making the center of the annular space a low-pressure area. Under the action of the pressure difference, the air flow will tangentially flow into the annular space from the flow-through channel between the first semi-circle and the second semi-circle and flow along the walls of the first semi-circle and the second semi-circle, thus forming a spiral air flow, which can suck the bacteria growing on the frozen product into the gas flow channel for subsequent detection. And since the pressure inside the annular space is low and the outside is a high-pressure area, under the action of the internal and external pressure difference, the bacteria on the frozen product will not escape outward, avoiding the outward diffusion of bacteria during detection.

[0025] 2. When the low-temperature and high-humidity thawing equipment thaws, it thaws the frozen product through low-temperature steam. Bacteria are small in volume and easily adsorbed onto the small droplets in the steam. Therefore, a large number of bacteria are enriched on the small droplets. Driven by the spiral air flow, the small droplets enter the contraction section at a certain speed. The spirally moving small droplets will be affected by the centrifugal force and thus be distributed on the outer ring of the contraction section. And as the diameter of the contraction section gradually decreases, the centrifugal force received by the small droplets gradually increases. Under the action of the centrifugal force, the small droplets tend to be further distributed on the outer ring of the contraction section, thus enriching the small droplets in the steam, that is, enriching the bacteria adsorbed on the small droplets. The air flow enriched with bacteria, after passing through the guide block and flowing through the conical head, will converge into the center of the gas flow channel under the guiding action of the inclined surface on the guiding ring and the conical head. And the small droplets in the air flow will be negatively charged by the charge ring. In this way, the negatively charged small droplets will tend to be distributed in the center of the gas flow channel when passing through the electrode plate due to the principle of like charges repelling each other, thus avoiding the escape of the droplets enriched with bacteria and keeping them stable in the center of the gas flow channel for subsequent detection.

[0026] 3. After being guided by the contraction section, the air flow distributed in the inner ring of the contraction section will flow into the connecting flow channel and the annular flow channel in sequence along the diversion channel, and under the guiding action of the inclined outlet air flow channel, enter the outer ring of the gas flow channel in a spiral flow state. The spiral flow of the air flow plays a constraining role on the air flow enriched with bacteria in the center of the gas flow channel, further avoiding the outward escape of the air flow enriched with bacteria, thus ensuring the enrichment effect of bacteria. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the present invention;

[0028] Figure 2 is the partial cross-sectional view of the present invention;

[0029] Figure 3 is the cross-sectional view of the present invention;

[0030] Figure 4 is Figure 3Enlarged view in the A direction;

[0031] Figure 5 Schematic diagram of the gas flow direction;

[0032] Figure 6 Partial cross-sectional view of the housing;

[0033] Figure 7 Schematic diagram of the gas flow direction in the air outlet channel.

[0034] In the figure: 1. Housing; 11. Gas flow channel; 111. Converging section; 12. Connecting flow channel; 13. Annular flow channel; 14. Air outlet channel; 2. Flow guiding component; 21. First semi-circle; 211. First spiral groove; 22. Second semi-circle; 221. Second spiral groove; 23. Flow-through channel; 3. Enrichment component; 31. Flow guiding block; 311. Shunt channel; 312. Tapered head; 32. Guide ring; 321. Inclined surface; 33. Charged ring; 34. Electrode plate; 35. Heating wire; 4. Detection component; 41. Protective shell; 411. Air inlet; 412. Air outlet; 5. Power fan blade. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment: As Figures 1 - 7 shown, the present invention provides a technical solution for an on-line bacteria detection device for a low-temperature and high-humidity thawing device.

[0037] The on-line bacteria detection device includes a housing 1, a flow guiding component 2, an enrichment component 3, a detection component 4 and a power fan blade 5. A gas flow channel 11 is provided inside the housing 1. The enrichment component 3, the detection component 4 and the power fan blade 5 are arranged in sequence along the gas flow direction in the gas flow channel 11. The flow guiding component 2 is fixedly connected to the housing 1, the enrichment component 3 is fixedly connected to the housing 1, the detection component 4 is fixedly connected to the housing 1 of the detection component, and the power fan blade 5 is rotatably connected to the housing 1.

[0038] The on-line bacterial detection device of the present invention is installed in the thawing device. When detection is required, the on-line bacterial detection device is moved to the position to be detected through a corresponding moving module. The moving module can be a multi-axis platform, etc., which is prior art and will not be elaborated here. The housing 1 is used to provide protection for each component. When performing bacterial detection, the diversion component 2 is sleeved on the frozen product to be detected. The power fan blade 5 is started to form a negative pressure in the gas flow channel 11, and the air around the frozen product is adsorbed by using the pressure difference. If bacteria grow on the frozen product, the bacteria will be carried by the air flow and pass through the enrichment component 3 along the gas flow channel 11. The enrichment component 3 can enrich the bacteria in the air flow for subsequent detection, and finally enter the detection component 4 for detection. The detection component 4 is used to detect the bacterial content in the air flow, so as to judge whether the bacteria on the frozen product exceed the standard during the thawing process.

[0039] The diversion component 2 includes a first semi-circle 21 and a second semi-circle 22. The first semi-circle 21 and the second semi-circle 22 are eccentrically arranged, and there is a flow-through channel 23 between the first semi-circle 21 and the second semi-circle 22.

[0040] The annular space formed by the eccentrically arranged first semi-circle 21 and second semi-circle 22 can surround the frozen product. This annular space is communicated with the gas flow channel 11. Under the action of the power fan blade 5, a negative pressure is formed in the gas flow channel 11, making the annular space a low-pressure area. Under the action of the pressure difference, the air flow will tangentially flow into the annular space from the flow-through channel 23 between the first semi-circle 21 and the second semi-circle 22 and flow along the walls of the first semi-circle 21 and the second semi-circle 22, thus forming a spiral air flow, so as to suck the bacteria growing on the frozen product into the gas flow channel 11 for subsequent detection. And since the annular space is at low pressure and the outside is at high pressure, under the action of the internal and external pressure difference, the bacteria on the frozen product will not escape outward, avoiding the outward diffusion of bacteria during detection.

[0041] The first semi-circle 21 is provided with a first spiral groove 211, and the second semi-circle 22 is provided with a second spiral groove 221. The first spiral groove 211 and the second spiral groove 221 are used to guide the air flow.

[0042] The spiral air flow formed in the annular space composed of the first semi-circle 21 and the second semi-circle 22 is formed under the action of the internal and external pressure difference and the wall guidance of the first semi-circle 21 and the second semi-circle 22. In order to improve the wall guidance effect, the air flow is further guided through the first spiral groove 211 and the second spiral groove 221, so as to improve the stability of the spiral air flow for subsequent bacterial enrichment.

[0043] One end of the gas flow channel 11 close to the diversion component 2 is provided with a contraction section 111. The cross-section of the contraction section 111 is conical. The enrichment component 3 includes a diversion block 31. The diversion block 31 is coaxial with the gas flow channel 11, and a diversion channel 311 is provided in the diversion block 31. The diversion channel 311 is communicated with the gas flow channel 11.

[0044] When the low-temperature and high-humidity thawing equipment thaws, it thaws the frozen products through low-temperature steam. Since bacteria are small in volume and easily adhere to the small droplets in the steam, a large number of bacteria are enriched on the small droplets. Driven by the spiral air flow, the small droplets enter the contraction section 111 at a certain speed. The spirally moving small droplets will be affected by the centrifugal force and thus be distributed on the outer ring of the contraction section 111. And as the diameter of the contraction section 111 gradually decreases, the centrifugal force received by the small droplets gradually increases. Under the action of the centrifugal force, the small droplets tend to be further distributed on the outer ring of the contraction section 111, thereby enriching the small droplets in the steam, that is, enriching the bacteria adsorbed on the small droplets. The air flow enriched with bacteria flows towards the detection component 4 under the guidance of the diversion block 31, and the air containing fewer bacteria in the inner ring of the contraction section 111 flows out from the diversion channel 311.

[0045] The diversion block 31 is provided with a conical head 312. A guiding ring 32 is arranged circumferentially on the conical head 312. The guiding ring 32 is fixedly connected to the inner wall of the gas flow channel 11. The guiding ring 32 is provided with an inclined surface 321. The inclination angle of the inclined surface 321 matches that of the conical head 312. A charged ring 33 is sleeved on the conical head 312. The charged ring 33 releases negative charges. An electrode plate 34 is arranged on one side of the gas flow channel 11 close to the guiding ring 32. The electrode plate 34 is negatively charged.

[0046] After the air flow enriched with bacteria passes through the diversion block 31 and flows through the conical head 312, it will converge into the center of the gas flow channel 11 under the guiding action of the inclined surface 321 on the guiding ring 32 and the conical head 312. And the small droplets in the air flow will be charged negatively by the charged ring 33. In this way, when the negatively charged small droplets pass through the electrode plate 34, due to the principle of like charges repelling each other, they tend to be distributed in the center of the gas flow channel 11, thus preventing the droplets enriched with bacteria from escaping and making them stable in the center of the gas flow channel 11, so as to facilitate subsequent detection.

[0047] A connecting flow channel 12, an annular flow channel 13 and an air outlet flow channel 14 are arranged in the housing 1. One end of the connecting flow channel 12 is communicated with the diversion channel 311, and the other end of the connecting flow channel 12 is communicated with the annular flow channel 13. The air outlet flow channel 14 is communicated with the annular flow channel 13. A plurality of air outlet flow channels 14 are arranged circumferentially along the annular flow channel 13. The air outlet ends of the plurality of air outlet flow channels 14 penetrate through the electrode plate 34 and face the gas flow channel 11. The plurality of air outlet flow channels 14 are arranged obliquely.

[0048] The connecting flow channel 12 is used to connect the shunt flow channel 311 and the annular flow channel 13. After the air flow is guided by the contraction section 111, the air flow distributed in the inner circle of the contraction section 111 will flow into the connecting flow channel 12 and the annular flow channel 13 successively along the shunt flow channel 311, and under the guidance of the inclined air outlet flow channel 14, it will enter the outer circle of the gas flow channel 11 in a spiral flow state. The spiral flowing air flow plays a constraining role on the air flow enriched with bacteria in the center of the gas flow channel 11, further preventing the air flow enriched with bacteria from escaping outward, thus ensuring the enrichment effect of bacteria.

[0049] The inclination directions of several air outlet flow channels 14 are the same as the spiral directions of the first spiral groove 211 and the second spiral groove 221.

[0050] Under the guiding action of the first spiral groove 211 and the second spiral groove 221, the air flow enters the gas flow channel 11 in a spiral motion state. When the spiral flowing air flow flows through the electrode plate 34, in order to prevent the spiral air flow for constraint formed under the guidance of the air outlet flow channel 14 from dispersing the air flow enriched with bacteria flowing in the inner circle in a spiral manner, by making the inclination directions of several air outlet flow channels 14 the same as the spiral directions of the first spiral groove 211 and the second spiral groove 221, the flowing direction of the constrained spiral air flow is the same as the flowing direction of the air flow enriched with bacteria flowing in the inner circle in a spiral manner.

[0051] An electric heating wire 35 is wound around the connecting flow channel 12.

[0052] Bacteria are enriched on the small liquid droplets in the air flow, and the liquid droplets will affect the subsequent detection. By winding an electric heating wire 35 around the connecting flow channel 12, the constrained air flow flowing out from several air outlet flow channels 14 carries heat. Using heat transfer, the small liquid droplets enriched with bacteria are evaporated, so that the air flow enriched with bacteria enters the detection component 4 in a dry state, thereby improving the accuracy of the subsequent detection.

[0053] The detection component 4 includes a protective shell 41. An air inlet 411 and an air outlet 412 are provided on the protective shell 41. The air inlet 411 faces the enrichment component 3, and the air outlet 412 faces the power fan blade 5. An excitation light source and a fluorescence detection element are provided inside the protective shell 41.

[0054] The detection component 4 is arranged at the center of the gas flow channel 11, so that the air flow enriched with bacteria at the center of the gas flow channel 11 will flow into the fluorescence detection element in the protective shell 41 along the air inlet 411, thus facilitating detection. The excitation light source is set to be able to emit excitation light after being powered on, and the excitation light can excite bacteria to produce fluorescence. The fluorescence detection element is configured to be able to detect the fluorescence emitted by bacteria 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 produced under the induction of the excitation light. That is to say, when it is necessary to detect the number of microorganisms in the target to be detected, for example, when detecting the microbial content in the air, the excitation light emitted by the excitation light source is used to irradiate the target to be detected, and then the fluorescence emitted by the bacteria carried in the target to be detected is detected by the fluorescence detection element, so that the number of bacteria can be judged. The detected gas flows out through the air outlet 412, and a corresponding sterilization component, such as an ultraviolet germicidal lamp, etc., can be set at the air outlet 412 to prevent the detected bacteria from spreading to other positions.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An online bacteria detection device for low-temperature and high-humidity thawing equipment, characterized in that: The invention comprises a shell, a flow guide component, an enrichment component, a detection component and a power fan blade, wherein a gas flow channel is arranged in the shell, and the enrichment component, the detection component and the power fan blade are sequentially arranged in the gas flow channel along the flow direction of the gas, the flow guide component is tightly connected to the shell, the enrichment component is tightly connected to the shell, the detection component is tightly connected to the shell, and the power fan blade is rotatably connected to the shell; the flow guide component comprises a first semicircle and a second semicircle, the first semicircle and the second semicircle are eccentrically arranged, and a flow passage is arranged between the first semicircle and the second semicircle; a first spiral groove is arranged on the first semicircle, The second semicircle is provided with a second spiral groove, and the first spiral groove and the second spiral groove are used to guide the gas flow; the gas flow channel is provided with a contraction section at one end close to the guide component, and the cross-section of the contraction section is conical; the enrichment component includes a guide block, the guide block is coaxial with the gas flow channel, the guide block is provided with a conical head, the circumference of the conical head is provided with a guide ring, the guide ring is tightly connected to the inner wall of the gas flow channel, the guide ring is provided with an inclined surface, the inclination angle of the inclined surface matches the conical head, the conical head is provided with a charged ring, the charged ring releases negative charge, and the gas flow An electrode plate is provided on one side of the gas flow channel close to the guide ring, and the electrode plate is negatively charged; the detection component includes a protective shell, and an air inlet and an air outlet are provided on the protective shell, the air inlet faces the enrichment component, and the air outlet faces the power fan blades, an excitation light source and a fluorescence detection element are provided in the protective shell, and the detection component is arranged in the center of the gas flow channel; an annular space composed of the first semicircle and the second semicircle is connected to the gas flow channel, and the gas flow channel forms a negative pressure under the action of the power fan blades, and the annular space is low pressure. Under the action of the internal and external pressure difference, the airflow flows tangentially from the flow channel into the annular space, and flows along the first semicircle and the second semicircle. The walls of the two semicircles flow to form a spiral airflow, and small droplets enriched with bacteria enter the contraction section driven by the spiral airflow and are concentrated in the outer circle of the contraction section under the action of centrifugal force. After passing through the guide block and the conical head, the airflow enriched with bacteria flows into the center of the gas flow channel under the guidance of the inclined surface on the guide ring and the conical head. The small droplets in the airflow are negatively charged by the charged ring and are stably distributed in the center of the gas flow channel when passing through the electrode plate. The airflow enriched with bacteria located in the center of the gas flow channel flows along the air inlet into the fluorescent detection element, and the detection component detects the bacterial content in the airflow.

2. The on-line bacteria detection device for low-temperature and high-humidity thawing equipment according to claim 1, characterized in that: A shunt channel is provided in the guide block, and the shunt channel is connected to the gas flow channel; a connecting flow channel, an annular flow channel and an outlet flow channel are provided in the shell, one end of the connecting flow channel is connected to the shunt channel, and the other end of the connecting flow channel is connected to the annular flow channel, and the outlet flow channel is connected to the annular flow channel, and several outlet flow channels are arranged along the circumference of the annular flow channel, and the outlet ends of several of the outlet flow channels pass through the electrode plate toward the gas flow channel, and several of the outlet flow channels are arranged obliquely.

3. The on-line bacteria detection device for low-temperature and high-humidity thawing equipment according to claim 2, characterized in that: The inclination direction of the plurality of outlet flow channels is the same as the rotation direction of the first spiral groove and the second spiral groove.

4. The on-line bacteria detection device for low-temperature and high-humidity thawing equipment according to claim 3, characterized in that: An electric heating wire is wound around the connecting flow channel.

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