Infrared fire detection device

Abstract

The utility model belongs to the technical field of infrared detection, and discloses an infrared fire detection device, which comprises a shell; the infrared assembly comprises transmitting mechanisms and a receiving mechanism, the transmitting mechanisms are arranged at the two opposite ends of the shell, the receiving mechanism is arranged between the transmitting mechanisms and connected with the shell, and the receiving mechanism comprises a receiving unit, a convex lens and a reflecting mirror; the air suction wheel disc comprises a rotating wheel and a plurality of protrusions, the protrusions are arranged on the circumferential side of the rotating wheel and communicate with the rotating wheel, and openings are formed in the faces, perpendicular to the connecting positions of the protrusions and the rotating wheel, of the protrusions; the gas containing cavity is connected with the launching mechanism and arranged on the two opposite sides of the shell, a detection sensor is arranged in the shell, and the detection sensor is connected with the gas containing cavity. According to the invention, the focusing capability on infrared radiation is enhanced, the interference of environmental factors on infrared radiation propagation is reduced, and the accuracy and reliability of fire detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared detection, and particularly relates to an infrared fire detection device. Background Art

[0002] In modern industry and automation technology, infrared fire detection devices are widely used in early fire warning systems. These devices use infrared technology to detect flames or heat sources and judge whether a fire has occurred by analyzing infrared radiation. However, existing infrared fire detection devices have some disadvantages and deficiencies in practical applications.

[0003] Existing infrared fire detectors emit infrared radiation and then receive the infrared radiation scattered by flames or other obstacles. Although these devices can theoretically achieve fire detection, in practical applications, their performance is often limited due to environmental factors. For example, environmental conditions such as dust, smoke, and temperature fluctuations may interfere with the propagation of infrared rays, resulting in a decrease in detection accuracy. In addition, when existing detectors encounter multi-source interference, they may not be able to accurately distinguish true fire signals from false alarm signals, and since the smoke generated by a fire may quickly fill the detection area, interfering with the normal transmission of infrared radiation, the detector may not be able to accurately judge the presence of a fire. Especially in enclosed or semi-enclosed environments, the accumulation of smoke may seriously affect the performance of the detector. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide an infrared fire detection device, aiming to solve the technical problem that the prior art cannot effectively distinguish true fire signals from false alarm signals.

[0005] To achieve the above purpose, the utility model provides an infrared fire detection device, including:

[0006] A housing;

[0007] An infrared component, the infrared component includes a transmitting mechanism and a receiving mechanism. The transmitting mechanism is arranged at opposite ends of the housing. The receiving mechanism is arranged between the transmitting mechanisms and is connected to the housing. The receiving mechanism includes a receiving unit, a convex lens, and a reflecting mirror. The reflecting mirror is connected to the receiving unit, and the convex lens is arranged at one end of the reflecting mirror away from the receiving unit;

[0008] An air suction wheel disc, including a rotating wheel and a plurality of protrusions. The plurality of protrusions are arranged on the circumferential side of the rotating wheel and are communicated with the rotating wheel. An opening is arranged on a surface perpendicular to the connection between the protrusion and the rotating wheel, and the orientation of the opening is the same as the emitting direction of the transmitting mechanism;

[0009] A gas containing cavity, which is connected to the emission mechanism and arranged on opposite sides of the housing. The suction wheel disc is connected to the side of the gas containing cavity away from the housing through a pipeline. A detection sensor is arranged inside the housing, and the detection sensor is connected to the gas containing cavity.

[0010] Furthermore, it further includes an alarm indicating device. The alarm indicating device includes a spiral coil and an alarm lamp. The spiral coil penetrates through the housing and is arranged inside the housing, and the alarm lamp is arranged outside the housing. The spiral coil is electrically connected to the alarm lamp.

[0011] Furthermore, the emission mechanism includes an infrared emitter and a focusing lens. The infrared emitter is connected to the gas containing cavity, and the focusing lens is arranged at one end of the infrared emitter away from the gas containing cavity.

[0012] Furthermore, it further includes a rotating assembly. The rotating assembly includes a motor and a transmission shaft. The motor is arranged inside the housing, the transmission shaft passes through the rotating wheel and is connected to the motor, and the motor is electrically connected to the detection sensor.

[0013] Furthermore, it further includes a connecting plate. The connecting plate is communicated with the gas containing cavity and penetrates through the housing. Ventilation holes are arranged on the part of the connecting plate exposed outside the housing, and the ventilation holes are communicated with the connecting plate and the gas containing cavity.

[0014] Furthermore, a plurality of gas guide plates are arranged inside the gas containing cavity. The gas guide plates are arranged on the inner wall of the gas containing cavity and are used to guide the gas flow to the detection sensor.

[0015] Furthermore, it further includes a control circuit, including a first control circuit and a second control circuit. The first control circuit is electrically connected to the detection sensor, the second control circuit is electrically connected to the alarm indicating device, and the first control circuit and the second control circuit are connected through a wire.

[0016] Furthermore, it further includes a heat dissipation mechanism. The heat dissipation mechanism is arranged inside the housing, and the first control circuit and the second control circuit are arranged on both sides of the heat dissipation mechanism.

[0017] Furthermore, it further includes a filtering device. The filtering device is arranged in the pipeline between the gas containing cavity and the suction wheel disc. The filtering device includes a filter net and a frame. The filter net is fixed on the frame, and the frame is connected to the pipeline.

[0018] Furthermore, the receiving mechanism further includes a filter film, and the filter film is arranged between the convex lens and the receiving unit.

[0019] Beneficial effects:

[0020] An infrared fire detection device of the present utility model can enhance the focusing ability of infrared radiation by arranging a convex lens and a reflecting mirror in the receiving mechanism, thereby improving the detection sensitivity to weak fire signals, enabling the detector to accurately identify fire signals in complex environments, reducing false alarms and missed alarms. The design of the air intake wheel disc enables the detector to actively inhale air samples, which are transmitted through a pipeline to the gas accommodation chamber for detection, effectively reducing the interference of environmental factors on the propagation of infrared radiation, improving the performance of the detector in harsh environments, and the rotation of the air intake wheel disc enables the detector to quickly inhale and analyze air samples, thus achieving a rapid response to fire signals, effectively solving the problems existing in the prior art, improving the accuracy and reliability of fire detection, and having a wide application prospect. Brief description of the drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the infrared fire detection device according to an embodiment of the present utility model;

[0022] Figure 2 is a schematic rear view structure diagram of the infrared fire detection device according to another embodiment of the present utility model;

[0023] Figure 3 is a schematic top view partial structure diagram of the infrared fire detection device according to another embodiment of the present utility model.

[0024] Wherein: 1, housing; 21, transmitting mechanism; 211, infrared emitter; 212, focusing lens; 22, receiving mechanism; 221, receiving unit; 222, convex lens; 223, reflecting mirror; 3, air intake wheel disc; 31, rotating wheel; 32, protrusion; 33, opening; 4, gas accommodation chamber; 5, alarm indicating device; 61, motor; 62, transmission shaft; 7, connecting plate; 71, ventilation hole; 81, first control circuit; 82, second control circuit; 91, heat dissipation mechanism; 92, detection sensor.

[0025] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0026] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically and clearly defined.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0030] Refer to Figures 1-3, an infrared fire detection device in an embodiment of the present utility model includes: a housing 1; an infrared component, the infrared component includes a transmitting mechanism 21 and a receiving mechanism 22, the transmitting mechanism 21 is arranged at opposite ends of the housing 1, the receiving mechanism 22 is arranged between the transmitting mechanisms 21 and is connected to the housing 1, the receiving mechanism 22 includes a receiving unit 221, a convex lens 222 and a reflecting mirror 223, the reflecting mirror 223 is connected to the receiving unit 221, and the convex lens 222 is arranged at one end of the reflecting mirror 223 away from the receiving unit 221; an air intake wheel disc 3, including a rotating wheel 31 and a plurality of protrusions 32, the plurality of protrusions 32 are arranged on the circumferential side of the rotating wheel 31 and are in communication with the rotating wheel 31, an opening 33 is arranged on a surface perpendicular to the connection between the protrusion 32 and the rotating wheel 31, and the orientation of the opening 33 is consistent with the emission direction of the transmitting mechanism 21; a gas storage cavity 4, the gas storage cavity 4 is connected to the transmitting mechanism 21 and is arranged on opposite sides of the housing 1, the air intake wheel disc 3 is connected to the surface of the gas storage cavity 4 away from the housing 1 through a pipeline, and a detection sensor 92 is arranged in the housing 1, and the detection sensor 92 is connected to the gas storage cavity 4.

[0031] In this embodiment, by arranging the convex lens 222 and the reflecting mirror 223 in the receiving mechanism 22, the focusing ability of infrared radiation can be enhanced, thereby improving the detection sensitivity to weak fire signals, enabling the detector to accurately identify fire signals in complex environments, reducing false alarms and missed alarms. The design of the air intake wheel disc 3 enables the detector to actively inhale air samples, which are transmitted to the gas storage cavity 4 through pipelines for detection, effectively reducing the interference of environmental factors on the propagation of infrared radiation, improving the performance of the detector in harsh environments, and the rotation of the air intake wheel disc 3 enables the detector to quickly inhale and analyze air samples, thereby realizing a rapid response to fire signals, effectively solving the problems existing in the prior art, improving the accuracy and reliability of fire detection, and having a wide application prospect.

[0032] It should be noted that in this embodiment, with the rotation of the suction wheel disc 3, the smoke particles in the air are sucked into the gas containing chamber 4. Due to the presence of the smoke particles, the intensity of the infrared signal passing through the gas containing chamber 4 is weakened. The receiving unit 221 in the receiving mechanism 22 detects the change in the intensity of the infrared signal and transmits the signal change to the detection sensor 92. The detection sensor 92 determines whether there is a fire risk based on the received signal intensity change. When the detected signal intensity is lower than the preset threshold, the detection sensor 92 triggers the alarm device to emit an audible and visual alarm signal to remind the user to take timely measures. The combination of the convex lens 222 and the reflector 223 further enhances the ability of the receiving unit 221 to capture the infrared signal, ensuring that the fire signal can be accurately detected even when the smoke concentration is relatively low. In addition, the rotation of the suction wheel disc 3 not only improves the response speed of the detector but also can adapt to different environmental conditions by changing the rotation speed, thereby optimizing the performance of the detector.

[0033] In another embodiment, a wheel structure is provided at the bottom of the housing 1, enabling the entire device to be conveniently moved and deployed in different locations. The provision of the wheels not only improves the flexibility of the device but also makes maintenance and inspection more convenient. In addition, the structural design of the wheels can adapt to various ground conditions, including carpets, tiles, wooden floors, etc., ensuring the stable operation of the device in different environments.

[0034] In one embodiment, an alarm indicating device 5 is further included. The alarm indicating device 5 includes a spiral coil and an alarm lamp. The spiral coil passes through the housing 1 and is disposed inside the housing 1, and the alarm lamp is disposed outside the housing 1. The spiral coil is electrically connected to the alarm lamp.

[0035] In this embodiment, when the detection sensor 92 determines that there is a fire risk and triggers the alarm, an electric current passes through the spiral coil to generate a magnetic field, which in turn drives the alarm lamp to emit a flashing light signal. This not only attracts people's attention but also, in a noisy environment, the light signal is more easily detectable than the sound signal, thus ensuring effective notification of on-site personnel in case of an emergency. In another embodiment, the alarm indicating device 5 further includes a sound alarm function. When a fire signal is detected, in addition to the light signal, a sound alarm is also emitted. The sound alarm device can also include a built-in buzzer or speaker that can emit a loud and penetrating sound to remind people to take emergency measures. The volume and frequency of the sound alarm are optimized to ensure clear audibility in various environments.

[0036] In one embodiment, the emission mechanism 21 includes an infrared emitter 211 and a focusing lens 212. The infrared emitter 211 is connected to the gas accommodation chamber 4, and the focusing lens 212 is disposed at one end of the infrared emitter 211 away from the gas accommodation chamber 4.

[0037] In this embodiment, the infrared emitter 211 is connected to the gas accommodation chamber 4 to ensure that the emitted infrared radiation can pass through the air sample in the gas accommodation chamber 4. When there are smoke particles generated by a fire in the air sample, these particles will absorb or scatter part of the infrared radiation, resulting in a change in the signal intensity received by the receiving mechanism 22. Further, by analyzing this change in signal intensity, the detection sensor 92 can accurately determine whether there is a fire risk. The infrared emitter 211 is responsible for generating infrared radiation signals, and the focusing lens 212 ensures that these signals can be effectively concentrated and emitted to a predetermined detection area. By precisely controlling the emission frequency and intensity of the infrared emitter 211, the recognition ability of the detector for fire signals can be further improved, while reducing interference from other non-fire factors. The design of the focusing lens 212 enables the infrared radiation to maintain a high energy density during propagation, so as to achieve effective detection even at a relatively long distance.

[0038] In one embodiment, it further includes a rotating assembly. The rotating assembly includes a motor 61 and a transmission shaft 62. The motor 61 is disposed in the housing 1, the transmission shaft 62 passes through the rotating wheel 31 and is connected to the motor 61, and the motor 61 is electrically connected to the detection sensor 92.

[0039] In this embodiment, the rotating assembly includes a motor 61 and a transmission shaft 62. The motor 61 drives the rotating wheel 31 to rotate through the transmission shaft 62, thereby realizing the active inhalation of the air sample. In another embodiment, the rotation speed of the motor 61 can be adjusted according to the feedback signal of the detection sensor 92 to adapt to different environmental conditions and detection requirements. For example, in the initial stage of a fire when the smoke concentration is low, the motor 61 can operate at a lower speed to ensure that the inhaled air sample contains enough smoke particles for detection; while in the case of a more serious fire with a higher smoke concentration, the motor 61 can increase its speed to quickly inhale a large amount of air samples and accelerate the detection speed.

[0040] In one embodiment, it further includes a connecting plate 7. The connecting plate 7 is communicated with the gas accommodation chamber 4 and penetrates through the housing 1. A ventilation hole 71 is provided on the part of the connecting plate 7 exposed outside the housing 1, and the ventilation hole 71 is communicated with the connecting plate 7 and the gas accommodation chamber 4.

[0041] In this embodiment, the connecting plate 7 communicates with the gas containing chamber 4 to ensure that the air sample can be smoothly transmitted from the external environment into the gas containing chamber 4 for detection. The part of the connecting plate 7 exposed outside the housing 1 is provided with ventilation holes 71. These ventilation holes 71 not only contribute to the circulation of the air sample but also prevent the internal pressure of the gas containing chamber 4 from being too high or too low due to changes in the external environmental pressure, thus ensuring the normal operation of the detector. In addition, the design of the ventilation holes 71 can also reduce the accumulation of dust and particulate matter, avoid interference with the detection sensor 92, and improve the stability and service life of the detector. In another embodiment, a temperature sensor is also provided on the connecting plate 7 for monitoring the temperature change in the gas containing chamber 4. Since the temperature usually rises during a fire, the temperature sensor can be used as an auxiliary means for fire detection. When the temperature sensor detects that the temperature exceeds the preset threshold, it can work in cooperation with the detection sensor 92 to further confirm whether there is a fire risk. This dual detection mechanism can further reduce the possibility of false alarms and missed alarms and improve the reliability of the detector.

[0042] In one embodiment, a plurality of gas guide plates are provided in the gas containing chamber 4. The gas guide plates are arranged on the inner wall of the gas containing chamber 4 for guiding the gas flow towards the detection sensor 92.

[0043] In this embodiment, the arrangement of the gas guide plates enables the air sample to flow more orderly towards the detection sensor 92 after entering the gas containing chamber 4, thereby improving the accuracy and efficiency of detection. The gas guide plates ensure the uniform distribution of the air sample in the chamber, avoid the occurrence of dead corners or turbulence, reduce detection errors and improve the sensitivity of the detector.

[0044] In one embodiment, a control circuit is further included, which includes a first control circuit 81 and a second control circuit 82. The first control circuit 81 is electrically connected to the detection sensor 92, the second control circuit 82 is electrically connected to the alarm indicating device 5, and the first control circuit 81 and the second control circuit 82 are connected by wires.

[0045] In this embodiment, the first control circuit 81 is responsible for receiving the signals from the detection sensor 92 and performing real-time analysis and processing on these signals. When a fire risk is detected, the first control circuit 81 sends an alarm signal to the second control circuit 82, and the second control circuit 82 is responsible for activating the alarm indicating device 5, including driving the alarm lamp to flash and the sound alarm device to emit an alarm.

[0046] In one embodiment, a heat dissipation mechanism 91 is further included. The heat dissipation mechanism 91 is arranged inside the housing 1, and the first control circuit 81 and the second control circuit 82 are arranged on both sides of the heat dissipation mechanism 91.

[0047] In this embodiment, the heat dissipation mechanism 91 is disposed inside the housing 1 to ensure that the electronic device will not be damaged due to overheating during long-term operation. The heat dissipation mechanism 91 may include heat sinks, fans, or other cooling devices, which can effectively dissipate the heat generated by the electronic device into the external environment. In this embodiment, the heat sink is in close contact with the first control circuit 81 and the second control circuit 82 to ensure that the heat can be quickly conducted and dissipated. The fan is responsible for providing air flow to further enhance the heat dissipation effect.

[0048] In one embodiment, a filtering device is further included. The filtering device is disposed in the pipeline between the gas storage chamber 4 and the suction wheel disc 3. The filtering device includes a filter net and a frame. The filter net is fixed on the frame, and the frame is connected to the pipeline.

[0049] In one embodiment, the filtering device is provided to ensure that the inhaled air sample does not contain excessive dust and particulate matters, which may have a negative impact on the performance of the detection sensor 92 and even cause false alarms or missed alarms. The filter net adopts a multi-layer structure, which can effectively intercept particulate matters of different sizes while maintaining good air permeability. In this embodiment, the frame of the filtering device is connected to the pipeline to ensure that the air sample can smoothly enter the gas storage chamber 4 for detection after being filtered. In another embodiment, the filtering device further includes a replaceable filter element, so that it can be conveniently replaced when the filter net is blocked or damaged, thereby ensuring the long-term stable operation of the detector. The design of the replaceable filter element makes the maintenance work more convenient. The user can regularly replace the filter element according to the actual use situation to ensure the detection accuracy and reliability of the detector.

[0050] In one embodiment, the receiving mechanism 22 further includes a filter, and the filter is disposed between the convex lens 222 and the receiving unit 221.

[0051] In this embodiment, the setting of the filter improves the sensitivity of the detector to infrared radiation of a specific wavelength, thereby enhancing the accuracy of fire detection. Since the smoke and flame generated by a fire will release infrared radiation of a specific wavelength, the filter can effectively filter out interference signals of other wavelengths, so that the receiving unit 221 can more clearly receive the infrared signals related to the fire. In this embodiment, the filter is used in cooperation with the convex lens 222 and the receiving unit 221 to ensure that only infrared radiation of a specific wavelength can pass through, thereby improving the sensitivity and reliability of the detector.

[0052] The above are only the preferred embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. An infrared fire detection device, characterized in that, Comprising: A housing; An infrared component, the infrared component includes a transmitting mechanism and a receiving mechanism, the transmitting mechanism is arranged at opposite ends of the housing, the receiving mechanism is arranged between the transmitting mechanisms and connected to the housing, the receiving mechanism includes a receiving unit, a convex lens and a reflecting mirror, the reflecting mirror is connected to the receiving unit, and the convex lens is arranged at one end of the reflecting mirror away from the receiving unit; An air suction wheel disc, including a rotating wheel and a plurality of protrusions, the plurality of protrusions are arranged on the circumferential side of the rotating wheel and communicate with the rotating wheel, an opening is arranged on a surface perpendicular to the connection part of the protrusion and the rotating wheel, and the orientation of the opening is consistent with the emitting direction of the transmitting mechanism; A gas accommodation chamber, the gas accommodation chamber is connected to the transmitting mechanism and arranged on opposite sides of the housing, the air suction wheel disc is connected to a surface of the gas accommodation chamber away from the housing through a pipeline, a detection sensor is arranged in the housing, and the detection sensor is connected to the gas accommodation chamber.

2. The infrared fire detection device according to claim 1, wherein It further includes an alarm indicating device, the alarm indicating device includes a spiral coil and an alarm lamp, the spiral coil penetrates through the housing and is arranged in the housing, the alarm lamp is arranged outside the housing, and the spiral coil is electrically connected to the alarm lamp.

3. The infrared fire detection device according to claim 1, characterized in that, The transmitting mechanism includes an infrared emitter and a focusing lens, the infrared emitter is connected to the gas accommodation chamber, and the focusing lens is arranged at one end of the infrared emitter away from the gas accommodation chamber.

4. The infrared fire detection device according to claim 1, characterized in that, It further includes a rotating component, the rotating component includes a motor and a transmission shaft, the motor is arranged in the housing, the transmission shaft passes through the rotating wheel and is connected to the motor, and the motor is electrically connected to the detection sensor.

5. The infrared fire detection device according to claim 1, characterized in that, It further includes a connecting plate, the connecting plate communicates with the gas accommodation chamber and penetrates through the housing, and ventilation holes are arranged on a part of the connecting plate exposed outside the housing, and the ventilation holes communicate with the connecting plate and the gas accommodation chamber.

6. The infrared fire detection device according to claim 1, wherein A plurality of gas guiding plates are arranged in the gas accommodation chamber, and the gas guiding plates are arranged on the inner wall of the gas accommodation chamber for guiding the gas flow to the detection sensor.

7. The infrared fire detection device according to claim 2, characterized in that, It further includes a control circuit, including a first control circuit and a second control circuit, the first control circuit is electrically connected to the detection sensor, the second control circuit is electrically connected to the alarm indicating device, and the first control circuit and the second control circuit are connected by a wire.

8. The infrared fire detection device according to claim 7, characterized in that, It further includes a heat dissipation mechanism, the heat dissipation mechanism is arranged inside the housing, and the first control circuit and the second control circuit are arranged on both sides of the heat dissipation mechanism.

9. The infrared fire detection device according to claim 1, wherein, It further includes a filtering device, the filtering device is arranged in the pipeline between the gas accommodation chamber and the air suction wheel disc, the filtering device includes a filter screen and a frame, the filter screen is fixed on the frame, and the frame is connected to the pipeline.

10. The infrared fire detection device according to claim 1, characterized in that, The receiving mechanism further includes a filter film, and the filter film is arranged between the convex lens and the receiving unit.

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