Gas detection device

Abstract

The utility model relates to a gas detection device which comprises a box body, a gas sensor, a gas suction assembly and a camera shooting assembly, the box body comprises a mounting surface, a working surface opposite to the mounting surface and an inner cavity; the wall of the box body is also provided with a vent hole for communicating the internal environment and the external environment; the gas sensor is arranged in the inner cavity; the gas suction assembly is arranged in the inner cavity and located between the gas sensor and the working face. The air suction assembly comprises a rotating shaft, a plurality of fan blades arranged in the circumferential direction of the rotating shaft and a driving component used for driving the fan blades to rotate. The camera shooting assembly is installed on one side of the working face and connected with the gas sensor. According to the gas detection device, specific gas can quickly reach the gas sensor, so that the alarm speed is increased; and meanwhile, shadow capture can be carried out on the generation point of the specific gas, so that the generation point of the specific gas can be found.

Description

Technical Field

[0001] The utility model relates to the field of sensing technology, in particular to a gas detection device. Background Art

[0002] A gas detection device is a device used to detect the concentration of a specific gas and can trigger an alarm when it detects that the concentration of a specific gas exceeds the limit.

[0003] In related technologies, gas detection devices are equipped with sensors for detecting specific gases. The specific gas must reach the sensor to be successfully detected. Therefore, when the specific gas generation point is far from the detection sensor, it takes a long time for the specific gas to reach the sensor. Furthermore, the specific gas concentration at the gas detection device may be lower than the concentration at the specific gas generation point, making it impossible for the gas detection device to issue an alarm in a timely manner. Furthermore, after the gas detection device issues an alarm, relevant personnel may not be able to immediately confirm the cause of the specific gas generation. These factors all lead to relevant personnel being unable to promptly address the problem of excessive specific gas concentration. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a gas detection device.

[0005] The technical solution adopted by the utility model to solve the technical problem is to construct a gas detection device, which includes:

[0006] The box body comprises a mounting surface, a working surface opposite to the mounting surface, and an inner cavity between the mounting surface and the working surface; a vent hole is further provided on the wall of the box body to connect the inner cavity with the environment outside the box body;

[0007] a gas sensor, disposed in the inner cavity, for detecting the concentration of a specific gas;

[0008] An air suction assembly is disposed in the inner cavity and located between the gas sensor and the working surface; the air suction assembly includes a rotating shaft, a plurality of fan blades arranged in a circumferential direction of the rotating shaft, and a driving member for driving the plurality of fan blades to rotate; the plurality of fan blades drive the gas outside the box body to flow to the gas sensor through rotation;

[0009] A camera assembly is installed on one side of the working surface and connected to the gas sensor.

[0010] In some embodiments, the box body further includes a receiving groove formed inwardly along the working surface, and the camera assembly is disposed in the receiving groove;

[0011] The gas detection device further includes a linkage assembly installed in the box body; the linkage assembly includes a push rod disposed in the receiving groove, and a pushing member connected to the push rod; the pushing member is used to drive the push rod to push at least a portion of the camera assembly out of the receiving groove;

[0012] The linkage assembly further includes an elastic member for pulling the camera assembly back into the accommodating groove, and the elastic member is arranged between the camera assembly and the bottom wall of the accommodating groove.

[0013] In some embodiments, the rotating shaft is rotatably connected to the bottom wall of the accommodating groove, and the driving member drives the rotating shaft to rotate;

[0014] A recessed portion for receiving the push rod is provided on the bottom wall of the receiving groove; the push rod is slidably connected to the recessed portion and can move linearly along the axial direction of the recessed portion;

[0015] The pushing member includes a screw rod and a torsion spring;

[0016] The screw rod is rotatably arranged on the bottom wall of the accommodating groove, and one end of the screw rod is located in the recess and is threadedly connected to the push rod;

[0017] The torsion spring is sleeved on the screw rod, and one end of the torsion spring is connected to the screw rod, so as to drive the screw rod to rotate in a preset first direction during the energy release process after deformation;

[0018] The screw rod and the rotating shaft are further provided with a transmission structure, and the transmission structure drives the screw rod to rotate in a second direction opposite to the first direction through the rotation of the rotating shaft, and drives the torsion spring to deform.

[0019] In some embodiments, the transmission structure includes a first gear plate and a second gear plate;

[0020] The first gear plate is sleeved on the rotating shaft and rotates along with the rotating shaft;

[0021] The second gear plate is sleeved on the screw rod and rotates synchronously with the rotating shaft screw rod; a plurality of teeth are provided on the second gear plate to connect with the first gear plate; wherein any of the teeth is configured to retract into the second gear plate when subjected to external force during the period when the second gear plate is restricted in rotation, so as to convert the rotational force provided by the first gear plate into a retaining force to maintain the deformation of the torsion spring when the deformation of the torsion spring is maximum.

[0022] In some embodiments, the second gear plate further comprises a disc portion, and a plurality of slots circumferentially spaced and arranged on the periphery of the disc portion; the plurality of teeth are correspondingly and telescopically arranged in the plurality of slots;

[0023] The disc portion is provided with an air cavity in communication with the plurality of slots; the air cavity is provided with gas that can flow in and out of the slots, thereby providing a basis for at least a portion of the structure of the tooth portion to extend out of the slots and retract into the slots;

[0024] Alternatively, the second gear plate further includes a plurality of spring members correspondingly arranged in the plurality of slots; any of the spring members is interposed between the tooth portion and the bottom wall of the slot, and is respectively connected to the tooth portion and the wall of the slot.

[0025] In some embodiments, a surface of each tooth portion that is in the direction of the second direction is an inclined surface, and a surface of each tooth portion that is located on the opposite side of the inclined surface is a vertical surface.

[0026] In some embodiments, the rotating shaft is arranged parallel to the screw rod, and the rotating shaft and the screw rod are relatively fixed.

[0027] In some embodiments, the driving component includes at least two first electromagnets evenly arranged on the periphery of the multiple fan blades, and several magnetic blocks installed on at least a portion of the multiple fan blades; the at least two first electromagnets generate magnetism by energizing, so as to cooperate with the several magnetic blocks to drive the multiple fan blades to rotate.

[0028] In some embodiments, the plane in which the plurality of fan blades rotate is parallel to the working surface, the vent is formed on the working surface, and the gas sensor is disposed between the mounting surface and the plurality of fan blades.

[0029] In some embodiments, the camera assembly includes an infrared camera.

[0030] The implementation of the utility model has the following beneficial effects: the gas detection device can generate an airflow rotation that attracts the gas toward the gas sensor through the rotation of the fan blades, so that the specific gas can quickly enter the box body and reach the gas sensor, thereby improving the alarm speed; at the same time, the gas detection device also uses a camera component to capture the generation point of the specific gas, which is conducive to finding the generation point of the specific gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0032] Figure 1 Schematic diagram of the external structure of the gas detection device of the present utility model in some embodiments;

[0033] Figure 2 is a longitudinal cross-sectional view of the gas detection device of the present utility model in some embodiments;

[0034] Figure 3 yes Figure 2 An enlarged view of the content framed by the middle circle A;

[0035] Figure 4 This is a diagram showing the connection between the torsion spring, the lead screw, and the second gear plate in the gas detection device of the present invention;

[0036] Figure 5 This is a diagram showing the connection relationship between the first gear disc and the second gear disc in the gas detection device of the present utility model;

[0037] Figure 6 yes Figure 5 An enlarged view of the content framed by the middle circle B.

[0038] Figure numerals: gas detection device 100; box body 1; mounting surface 11; working surface 12; vent 13; inner cavity 14; accommodating groove 15; recess 151; mounting chamber 16; gas sensor 2; suction component 3; rotating shaft 31; fan blade 32; first electromagnet 33; camera component 4; linkage component 5; push rod 51; pushing member 52; first gear plate 521; second gear plate 522; disc portion 5221; slot 5222; tooth portion 5223; inclined surface 5224; vertical surface 5225; air cavity 5226; screw rod 523; torsion spring 524; elastic member 53. DETAILED DESCRIPTION

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0040] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. 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.

[0041] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0042] See Figures 1 to 6 The present invention constructs a gas detection device 100, which can solve the technical defect that the detection effect of the gas detection device 100 is easily limited due to the installation point of the gas detection device 100 being too far away from the specific gas generation point.

[0043] For reference Figure 2 The gas detection device 100 may include a box body 1, and a gas sensor 2, an air suction component 3, and a camera component 4 arranged in the box body 1. The gas sensor 2 is used to detect the concentration of a specific gas, and when the concentration of the specific gas exceeds a preset value, it provides feedback (for example, sends a feedback signal) to trigger an alarm. The air suction component 3 is used to generate an airflow to push the air outside the box body 1 to the location of the gas sensor 2. The camera component 4 is used to capture an image of the point where the specific gas is generated after the gas sensor 2 provides feedback for recording.

[0044] The gas detection device 100 may further include an alarm component (not shown), which is connected to the gas sensor 2 and is configured to issue an alarm, such as a beep, a flashing light, etc., after receiving feedback from the gas sensor 2. Of course, the alarm component is not limited to being a part of the gas detection device 100. In other embodiments, the alarm component may be a device independent of the gas detection device 100, which is electrically connected to the gas detection device 100 to receive feedback from the gas sensor 2.

[0045] It is understandable that the gas detection device 100 further includes a power supply component for supplying power, a control component for controlling whether the device is working, and the like; since these components are basic components, they will not be described in detail here.

[0046] The gas detection device 100 can be used in industrial fields or in household fields, without limitation. For industrial fields, such as the oil and gas industry, chemical and manufacturing industries, power plants, etc., the gas detection device 100 can be used to detect flammable gases and / or toxic gases. For household fields, the gas detection device 100 can be used to monitor the concentration of CO2 (carbon dioxide) and VOCs (volatile organic compounds) in indoor air.

[0047] The following uses the gas detection device 100 for household applications as an example. When the gas detection device 100 is installed indoors and performing monitoring operations, it is in a normal monitoring state. The air intake assembly 3 operates continuously, driving air from the outside of the housing 1 toward the location of the gas sensor 2. When a fire occurs indoors and produces a large amount of smoke, the air intake assembly 3 acts to quickly draw the smoke to the gas sensor 2. The gas sensor 2 triggers an alarm upon detecting excessive smoke concentration. At this point, the gas detection device 100 is activated, and the camera assembly 4 is triggered to capture images of the indoor environment to capture the point where the smoke originates. The smoke origin can be determined directly by the camera assembly 4 or manually. Once the smoke origin is located, the gas detection device 100 can save and record the smoke origin and upload it to other devices (such as mobile phones, computers, servers, etc.). Using this gas detection device 100, fire sources can be effectively extinguished in the early stages of a fire, and the ignition point can be easily located, effectively preventing a fire from recurring.

[0048] It should be noted that smoke obscures vision, and it may take time for personnel to arrive at the scene after receiving an alarm. Therefore, visibility will be even lower by the time personnel arrive at the scene, making it difficult to immediately locate the source of the smoke. However, if the camera assembly 4 captures the source of the smoke at the initial stage of the alarm, personnel can address the situation immediately upon arrival. Furthermore, if the source of the smoke is not within the visual range of the camera assembly 4, the camera assembly 4 can be configured to capture the location closest to the source of the smoke. For example, the camera assembly 4 can determine the location closest to the source of the smoke based on factors such as the amount of smoke and the temperature.

[0049] Optionally, the gas detection device 100 further includes a communication component for connecting to other terminals, and the communication component is used to transmit the data acquired by the camera component 4 to the other terminals. Of course, the communication component can also be integrated into the camera component 4, which is not limited here.

[0050] Preferably, the camera assembly 4 is retractably disposed within the housing 1. That is, in the normal monitoring state, the camera assembly 4 is located within the housing 1 and is dormant; in the activated state, at least a portion of the camera assembly 4 is located outside the housing 1 and is capturing images. It is understood that the retractable design of the camera assembly 4 can, on the one hand, help protect the lens of the camera assembly 4 from scratches and damage, and also help reduce dust on the lens of the camera assembly 4; on the other hand, it can protect privacy and prevent criminals from using the camera assembly 4 to take secret photos; and yet another aspect is to avoid the oppressive feeling of living under a camera. Furthermore, the camera assembly 4 only operates after an alarm is triggered, which can effectively reduce the energy consumption of the gas detection device 100 and extend the service life of the camera assembly 4.

[0051] In order to support the retractable design of the camera component 4, the gas detection device 100 also includes a linkage component 5 arranged in the box body 1, and the linkage component 5 can use whether the air-inhalation component 3 is working as a trigger signal, that is, the linkage component 5 is connected to the air-inhalation component 3, and the air-inhalation component 3 is arranged to stop working after feedback from the gas sensor 2. The linkage component 5 drives the camera component 4 in the box body 1 to the outside of the box body 1 after the air-inhalation component 3 stops working, and drives the camera component 4 outside the box body 1 back to the box body 1 after the air-inhalation component 3 resumes working. It can be supplemented here that since the linkage component 5 can use whether the air-inhalation component 3 is working as a trigger signal, and the air-inhalation component 3 stops working according to the feedback from the gas sensor 2, the linkage component 5 is equivalent to being indirectly connected to the gas sensor 2. In addition, the linkage component 5 can also be directly connected to the gas sensor 2 and use the feedback from the gas sensor 2 as a trigger signal. Please refer to the following for details.

[0052] The following is an exemplary description of the structures of some components of the gas detection device 100.

[0053] For reference Figure 1 The outer shape of the box body 1 can be cylindrical; of course, the outer shape of the box body 1 can also be other shapes, such as prism, hemispherical, etc.

[0054] Continue to refer Figure 2 The housing 1 has a mounting surface 11 and a working surface 12 opposite the mounting surface 11. The mounting surface 11 is used to secure or support the housing 1; the working surface 12 is used to extend the camera assembly 4. For example, if the gas detection device 100 is mounted on a ceiling, the mounting surface 11 of the housing 1 will contact the ceiling, and the camera assembly 4 can extend downward from the working surface 12 to the outside of the housing 1, or retract into the housing 1.

[0055] like Figure 1 As shown, the working surface 12 of the box body 1 is provided with a plurality of ventilation holes 13 extending therethrough to connect the interior and exterior spaces of the box body 1. Smoke can flow through these ventilation holes 13 to the gas sensor 2 within the box body 1. Of course, the ventilation holes 13 are not limited to being provided on the working surface 12 of the box body 1. The ventilation holes 13 can also be provided on other surfaces of the box body 1 besides the mounting surface 11, such as the circumferential wall surface of the box body 1.

[0056] For example Figure 2 As shown, the housing 1 has an inner cavity 14 in which the air intake assembly 3 and the gas sensor 2 can be installed. Furthermore, the housing 1 has a receiving groove 15 for receiving the camera assembly 4. The receiving groove 15 is concavely formed along the working surface 12 and is a single-opening groove having a notch located on the working surface 12, through which the camera assembly 4 can be extended or retracted.

[0057] The air suction assembly 3 may be disposed between the gas sensor 2 and the working surface 12. The air suction assembly 3 may include a rotating shaft 31, a plurality of fan blades 32 disposed circumferentially of the rotating shaft 31, and a driving member for driving the plurality of fan blades 32 to rotate.

[0058] In some embodiments, the driving member may include at least two first electromagnets 33 evenly arranged on the periphery of the plurality of fan blades 32, and a plurality of magnetic blocks (not shown) mounted on at least a portion of the plurality of fan blades 32. When airflow needs to be generated, the gas detection device 100 generates magnetism by energizing the first electromagnet 33, attracting or repelling the magnetic blocks located around it, thereby driving the plurality of fan blades 32 to rotate around the rotating shaft 31. The rotating shaft 31 can be rotatably connected to the outer side of the bottom wall of the accommodating groove 15 and is arranged perpendicular to the mounting surface 11 and the working surface 12. The plane on which the plurality of fan blades 32 rotate is parallel to the mounting surface 11 and the working surface 12.

[0059] In this embodiment, four fan blades 32 are evenly spaced around the circumference of the rotating shaft 31, with a magnet mounted on each of two opposing blades 32. Two first electromagnets 33 are disposed around the periphery of the fan blades 32, evenly spaced apart in the axial direction of the rotating shaft 31, i.e., on opposite sides of the rotating shaft 31 in the radial direction. It is understood that the magnets and first electromagnets 33 must be evenly spaced. Otherwise, the force applied to the fan blades 32 will be uneven, causing the fan blades 32 to become eccentric during rotation, which can easily cause the air intake assembly 3 to malfunction during prolonged operation.

[0060] In other embodiments (not shown in the accompanying drawings), the driving member may also be a driving motor connected to the rotating shaft 31, and the driving motor drives the rotating shaft 31 to rotate, thereby driving the plurality of fan blades 32 to rotate. It should be noted that compared to the above-mentioned magnetic drive solution, the driving motor drive solution may be more expensive and may require more space, which is not conducive to the miniaturization of the gas sensor 2.

[0061] The specific structure and detection principle of the gas sensor 2 can be referred to related technologies and will not be described in detail here. The gas sensor 2 can be provided in one or more forms, which is not limited here.

[0062] The camera assembly 4 may include an infrared camera. The infrared camera can capture the thermal radiation image generated by the temperature difference on the surface of an object based on infrared thermal imaging technology. When a fire occurs, the infrared camera can capture the heat signal in the smoke, thereby determining the point where the smoke is generated; for example, the position with the highest heat generation is used as the point where the smoke is generated. It should be noted here that the specific structure of the infrared camera can refer to the relevant technology, and the specific method of how to determine the point where the smoke is generated by the infrared camera can also refer to the relevant technology, which will not be elaborated here. In addition, it can be supplemented here that the camera assembly 4 is not limited to being retractable from one side of the working surface 12, and the camera assembly 4 can also be directly fixed to one side of the working surface 12. Secondly, the camera assembly 4 does not necessarily include an infrared camera, but may also include a camera with only a photographic function, which can determine the point where the smoke is generated by image recognition, such as using the position with the most obvious color as the point where the smoke is generated.

[0063] The linkage component 5 is arranged between the camera component 4 and the air suction component 3. Figure 3The linkage assembly 5 may include a push rod 51, a pushing member 52 and an elastic member 53; the pushing member 52 and the push rod 51 are respectively arranged on the bottom wall of the accommodating groove 15; the push rod 51 is used to contact the camera assembly 4, and the pushing member 52 is used to apply force to move the push rod 51 toward the camera assembly 4 after the suction assembly 3 stops working, and the pushing member 52 is reset after the suction assembly 3 resumes working, and the elastic member 53 is used to pull the camera assembly 4 back into the box body 1 after the pushing member 52 is reset.

[0064] Optionally, at least one of the pushing member 52 and the elastic member 53 may be provided. In this embodiment, the linkage assembly 5 includes two pushing members 52 and two elastic members 53 symmetrically arranged about the center line of the camera assembly 4 to provide sufficient pushing and pulling force and a larger force-bearing area, making the camera assembly 4 more stable and smooth during movement.

[0065] In some embodiments, please combine Figure 3-Figure 5 For reference, the pushing member 52 may include a transmission structure, a screw rod 523 and a torsion spring 524 .

[0066] like Figure 3 As shown, the bottom wall of the accommodating groove 15 is provided with a recess 151 for accommodating a single push rod 51. The screw rod 523 is rotatably disposed through the bottom wall of the accommodating groove 15 and is fixed relative to the rotating shaft 31, i.e., it does not translate. One end of the screw rod 523 passes through the bottom wall of the accommodating groove 15 and is located in the recess 151, while the other end of the screw rod 523 is located in the inner cavity 14. The push rod 51 is sleeved over the end of the screw rod 523 located in the recess 151 and is threadedly connected to the screw rod 523. Moreover, the push rod 51 is slidably connected to the recess 151 and can move linearly along the axial direction of the recess 151. It is understandable that the screw rod 523 can rotate along a preset first direction, which is the direction that separates the screw rod 523 from the push rod 51. Since the push rod 51 is slidably connected in the recess 151 and does not rotate, the push rod 51 does not rotate with the screw rod 523, but instead converts the rotational motion into linear motion, that is, the push rod 51 is displaced in the direction of the camera assembly 4, thereby ejecting the camera assembly 4. Optionally, the sliding connection can be a slide rail structure (not shown in the figure, the slide rail structure is a well-known technology and is omitted here) provided between the push rod 51 and the wall of the recess 151, the length direction of the slide rail structure being parallel to the axis of the recess 151, and the push rod 51 is linearly displaced by the slide rail structure.

[0067] The torsion spring 524 is used to drive the screw rod 523 to rotate along the first direction; the torsion spring 524 is sleeved on the structure located in the inner cavity 14 of the screw rod 523, and one end of the torsion spring 524 is fixed in the inner cavity 14, and the other end is connected to the screw rod 523; the torsion spring 524 can drive the screw rod 523 to rotate along the first direction during the energy release process after deformation.

[0068] The transmission structure is used to drive the torsion spring 524 to deform. This transmission structure is connected between the screw rod 523 and the rotating shaft 31 to transmit the rotational force of the rotating shaft 31 to the screw rod 523, thereby driving the screw rod 523 to rotate in a second direction opposite to the first direction. As the screw rod 523 rotates in the second direction, the torsion spring 524 gradually deforms.

[0069] In some embodiments, the transmission structure may include a first gear plate 521 and a second gear plate 522 to transmit the power through gear transmission. Of course, the transmission structure may also be a belt transmission, a chain transmission, etc., which are not specifically limited here.

[0070] like Figure 3 As shown, the first gear plate 521 is disposed on the rotating shaft 31 and is located between the camera assembly 4 and the fan blades 32; the first gear plate 521 can rotate along with the rotating shaft 31. The screw rod 523 is relatively fixedly disposed on one side of the first gear plate 521 in the circumferential direction, and the length direction of the screw rod 523 is parallel to the rotating shaft 31.

[0071] Continue reading Figure 5 The second gear plate 522 is used to be connected to the first gear plate 521; at the same time, the teeth of the second gear plate 522 are arranged to retract into the second gear plate 522 under external force during the period when the second gear plate 522 is restricted in rotation, and re-extend after the external force is removed, so as to convert the rotational force provided by the first gear plate 521 into a retaining force to maintain the deformation of the torsion spring 524 when the deformation of the torsion spring 524 is maximum.

[0072] It is understood that the pushing member 52 can include a charging state and a released state. When the gas detection device 100 is in the normal monitoring state, the pushing member 52 can be in the charging state, at which time the camera assembly 4 is located in the receiving groove 15; in the charging state, the torsion spring 524 reaches its maximum deformation, the second gear plate 522 is constrained by the torsion spring 524 and its rotation is blocked, the first gear plate 521 rotates with the rotating shaft 31, and the first gear plate 521 maintains the torsion spring 524 in the state of maximum deformation by contacting the second gear plate 522. Understandably, when the rotation of the second gear plate 522 is obstructed, when the teeth of the first gear plate 521 engage with the teeth of the second gear plate 522, the teeth in the second gear plate 522 that are under force will retract into the second gear plate 522 until they are extended back to their original positions after no longer receiving the force from the first gear plate 521; therefore, the second gear plate 522 will not rotate with the first gear plate 521 at this time, and will not hinder the continued rotation of the first gear plate 521; at the same time, the first gear plate 521 can always keep the torsion spring 524 in a state of maximum deformation during the rotation period after the second gear plate 522 is unable to continue rotating.

[0073] When the gas detection device 100 enters the active state from the normal monitoring state, the pushing member 52 is triggered to switch from the stored state to the released state, applying force to move the push rod 51 toward the camera assembly 4. This is triggered when the air intake assembly 3 stops operating. In the released state, the first gear plate 521 stops rotating due to the cessation of air intake assembly 3, allowing the torsion spring 524 to return to a free state. During this period, the torsion spring 524 can drive the screw rod 523 to rotate in the first direction. This allows the push rod 51 to move and push the camera assembly 4 out.

[0074] When the gas detection device 100 is restored from the activated state to the normal monitoring state, the pushing member 52 will be triggered to return from the released state to the charged state, that is, the pushing member 52 is reset. The triggering condition is that the air suction component 3 starts to work. At the same time, the elastic member 53 brings the camera component 4 back to the accommodating groove 15. During the period when the pushing member 52 is restored from the released state to the charged state, the first gear plate 521 rotates again due to the resumption of work of the air suction component 3. At the same time, the first gear plate 521 drives the screw rod 523 to rotate in the second direction through the meshing transmission with the second gear plate 522 until the torsion spring 524 reaches the maximum deformation. At this time, the screw rod 523 and the second gear plate 522 are reset, and the second gear plate 522 returns to the state where the rotation is blocked. The torsion spring 524 remains in the state of maximum deformation due to the rotation of the first gear plate 521.

[0075] It can be supplemented here that the end of the rotating shaft 31 can also be selected to pass through the accommodating groove 15 and be located in the accommodating groove 15, and the second gear plate 522, the torsion spring 524 and the first gear plate 521 are arranged in the accommodating groove 15, as long as there is enough space in the accommodating groove 15.

[0076] Alternatively, you can refer to Figure 2 The inner cavity 14 of the box body 1 is further provided with an installation chamber 16 between the bottom wall of the accommodating groove 15 and the fan blade 32; the first gear plate 521 and the second gear plate 522 can be arranged in the installation chamber 16, and one end of the screw rod 523 located in the inner cavity 14 can be rotatably connected to the wall of the installation chamber 16 close to the fan blade 32, and the torsion spring 524 can be arranged between the second gear plate 522 and the wall of the installation chamber 16 close to the fan blade 32, and the rotating shaft 31 passes through the wall of the installation chamber 16 and is connected to the bottom wall of the accommodating groove 15.

[0077] For reference Figure 6 The second gear plate 522 may include a disc portion 5221, and a plurality of slots 5222 arranged circumferentially at intervals are provided at the edge of the disc portion 5221, and each slot 5222 has a notch located on the outer peripheral side wall of the disc portion 5221; the second gear plate 522 also includes a plurality of teeth 5223 correspondingly arranged in each slot 5222.

[0078] In some embodiments, the tooth portion 5223 can be extended and retracted by pneumatic transmission. Specifically, the disc portion 5221 of the second gear plate 522 is provided with an air cavity 5226, and the air cavity 5226 is respectively connected to each slot 5222. The air cavity 5226 is filled with gas, and the gas can flow to the slot 5222 and push at least part of the structure of the tooth portion 5223 out of the slot 5222; when the rotation of the second gear plate 522 is obstructed, when the tooth portion 5223 is subjected to the force provided by the first gear plate 521, the tooth portion 5223 will retract into the slot 5222, and the gas in the slot 5222 will be squeezed back into the air cavity 5226; until it is no longer subjected to the force of the first gear plate 521, the gas in the air cavity 5226 will flow back to the slot 5222 and push the tooth portion 5223 out again. Optionally, the shape of the air cavity 5226 is annular; it can be supplemented here that, Figure 5 A horizontal cross-sectional view of the second gear plate 522 at a top-down angle is shown, in which a portion of the air cavity 5226 is blocked by the solid structure of the disc portion 5221 .

[0079] In other embodiments, the teeth 5223 can be extended and retracted by a spring member. Specifically, a spring member (not shown) is provided in each slot 5222, interposed between the teeth 5223 and the bottom wall of the slot 5222, for pushing at least a portion of the teeth 5223 out of the slot 5222 and providing a basis for the teeth 5223 to retract into the slot 5222 when an external force is applied during the period when the second gear plate 522 is restricted from rotating.

[0080] In addition, if Figure 6 As shown, the surface of the tooth portion 5223 of the second gear plate 522 that is in the forward direction of the second direction can be an inclined surface 5224. The inclination of the inclined surface 5224 makes the tooth width of the tooth portion 5223 gradually increase from the tooth top to the tooth root, so that the tooth portion 5223 can be retracted into the second gear plate 522 during the period when the second gear plate 522 is limited in rotation. It can be understood that Figure 5 Taking the angle shown as an example, the second gear plate 522 rotates counterclockwise to deform the torsion spring 524, i.e., the counterclockwise direction is the second direction. In this case, the surface of the tooth portion 5223 that is in the same direction as the second direction is the right side of the tooth portion 5223. In addition, the surface of the tooth portion 5223 opposite the inclined surface 5224 can be a vertical surface 5225.

[0081] In other embodiments (not shown in the accompanying drawings), the pushing member 52 may include a second electromagnet positioned within the receiving groove 15 and a spring member connected between the push rod 51 and the receiving groove 15. Furthermore, the push rod 51 may be provided with a magnetic member that cooperates with the second electromagnet. The second electromagnet may be configured to generate magnetism when energized after feedback from the gas sensor 2. Based on the principle of opposites attracting and likes repelling, the push rod 51 may receive a thrust to push the camera assembly 4 out. The second electromagnet may also be configured to lose its magnetism when the suction assembly 3 resumes operation, thereby removing the thrust. In this manner, the spring member pulls the push rod 51 back to its original position.

[0082] Optionally, the second electromagnet and the magnetic member have the same polarity. The magnetic member can be positioned on one side of the push rod 51 adjacent to the bottom of the receiving groove 15, for example, at the bottom of the push rod 51, or around the bottom of the push rod 51. The second electromagnet is fixed to the bottom of the receiving groove 15; the push rod 51 is positioned between the second electromagnet and the camera assembly 4. Due to the repulsion between the magnetic member and the energized second electromagnet, the push rod 51 moves toward the camera assembly 4.

[0083] Alternatively, the second electromagnet and the magnetic member have opposite polarity. The magnetic member can be positioned on the side of the push rod 51 adjacent to the notch of the receiving slot 15, for example, on the top of the push rod 51, or around the top of the push rod 51. The second electromagnet is fixed to the peripheral wall of the receiving slot 15 and positioned above the bottom of the camera assembly 4 in the dormant state. The push rod 51 will move toward the camera assembly 4 due to the attraction between the magnetic member and the energized second electromagnet.

[0084] It should be added here that the magnetic component cooperating with the second electromagnet is not limited to a component independent of the push rod 51; the push rod 51 itself can also serve as a magnetic component, for example, the push rod 51 is made of a magnetic material, or the outer layer of the push rod 51 is magnetic.

[0085] Look at elastic member 53 again, elastic member 53 can be a spring, such as a columnar spring, a tower spring. In addition, elastic member 53 can also be an elastic ball, an elastic band, etc., which are not limited here.

[0086] In summary, when the gas detection device 100 is in use, the first electromagnet 33 is energized, which cooperates with the magnetic member on the fan blade 32 to drive the fan blade 32 to rotate, thereby generating an airflow that draws gas toward the gas sensor 2. When smoke is present, the airflow quickly drives the smoke into the box body 1 and reaches the gas sensor 2. When the gas sensor 2 detects that the smoke concentration exceeds the limit, it triggers an alarm and controls the first electromagnet 33 to be de-energized, causing the fan blade 32 to stop rotating.

[0087] When the fan blades 32 stop rotating, the first gear plate 521 stops rotating synchronously, and the torsion spring 524 drives the screw rod 523 to rotate in the first direction due to the loss of external force, so that the push rod 51 pushes the camera assembly 4 out of the accommodating groove 15; the camera assembly 4 starts working, records the point where the smoke is generated, and can upload it to other devices.

[0088] The gas detection device 100 utilizes the suction component 3 to actively absorb the ambient air outside the gas detection device 100, thereby increasing the flow trend of the air, so that when smoke appears, it can quickly enter the gas detection device 100 for detection, thereby increasing the alarm speed; at the same time, the gas detection device 100 also utilizes the camera component 4 to record the point where the smoke is generated, which can effectively extinguish the fire source in the early stage of the fire, and is conducive to finding the fire point, effectively preventing the fire from happening again.

[0089] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A gas detection device, characterized in that: It includes: A box body (1) comprises a mounting surface (11), a working surface (12) opposite to the mounting surface (11), and an inner cavity (14) between the mounting surface (11) and the working surface (12); a vent hole (13) is further provided on the wall of the box body (1) for connecting the inner cavity (14) with the environment outside the box body (1); A gas sensor (2) is disposed in the inner cavity (14) and is used to detect the concentration of a specific gas; An air suction component (3) is arranged in the inner cavity (14) and located between the gas sensor (2) and the working surface (12); the air suction component (3) includes a rotating shaft (31), a plurality of fan blades (32) arranged in a circumferential direction of the rotating shaft (31), and a driving member for driving the plurality of fan blades (32) to rotate; the plurality of fan blades (32) drive the gas outside the box body (1) to flow to the gas sensor (2) through rotation; A camera assembly (4) is installed on one side of the working surface (12) and is connected to the gas sensor (2).

2. The gas detection device according to claim 1, characterized in that The box body (1) further includes a receiving groove (15) formed inwardly along the working surface (12), and the camera assembly (4) is arranged in the receiving groove (15); The gas detection device further comprises a linkage assembly (5) installed in the box body (1); the linkage assembly (5) comprises a push rod (51) arranged in the accommodating groove (15), and a pushing member (52) connected to the push rod (51); the pushing member (52) is used to drive the push rod (51) to push at least part of the structure of the camera assembly (4) out of the accommodating groove (15); The linkage assembly (5) further comprises an elastic member (53) for pulling the camera assembly (4) back into the accommodating groove (15); the elastic member (53) is arranged between the camera assembly (4) and the bottom wall of the accommodating groove (15).

3. The gas detection device according to claim 2, characterized in that: The rotating shaft (31) is rotatably connected to the bottom wall of the accommodating groove (15), and the driving member drives the rotating shaft (31) to rotate; A recess (151) for accommodating the push rod (51) is provided on the bottom wall of the accommodating groove (15); the push rod (51) is slidably connected to the recess (151) and can perform linear displacement along the axial direction of the recess (151); The pushing member (52) includes a screw rod (523) and a torsion spring (524); the screw rod (523) is rotatably inserted into the bottom wall of the accommodating groove (15), and one end of the screw rod (523) is located in the recess (151) and is threadedly connected to the push rod (51); the torsion spring (524) is sleeved on the screw rod (523), and one end of the torsion spring (524) is connected to the screw rod (523) to drive the screw rod (523) to rotate in a preset first direction during the energy release process after deformation; The screw rod (523) and the rotating shaft (31) are further provided with a transmission structure, and the transmission structure drives the screw rod (523) to rotate in a second direction opposite to the first direction through the rotation of the rotating shaft (31), and drives the torsion spring (524) to deform.

4. The gas detection device according to claim 3, characterized in that: The transmission structure comprises a first gear plate (521) and a second gear plate (522); The first gear plate (521) is sleeved on the rotating shaft (31) and rotates along with the rotating shaft (31); The second gear plate (522) is sleeved on the screw rod (523) and rotates synchronously with the screw rod (523) of the rotating shaft (31); a plurality of teeth (5223) are provided on the second gear plate (522) to connect with the first gear plate (521); wherein any of the teeth (5223) is configured to retract into the second gear plate (522) when subjected to external force during the period when the second gear plate (522) is restricted in rotation, so as to convert the rotational force provided by the first gear plate (521) into a retaining force for maintaining the deformation of the torsion spring (524) when the deformation of the torsion spring (524) is maximum.

5. The gas detection device according to claim 4, characterized in that: The second gear plate (522) further comprises a disc portion (5221) and a plurality of slots (5222) circumferentially spaced and arranged on the periphery of the disc portion (5221); the plurality of teeth (5223) are correspondingly and telescopically arranged in the plurality of slots (5222); The disc portion (5221) is provided with an air cavity (5226) in communication with the plurality of slots (5222); the air cavity (5226) is provided with gas that can flow in and out of the slots (5222), thereby providing a basis for at least a portion of the structure of the tooth portion (5223) to extend out of the slots (5222) and retract into the slots (5222); Alternatively, the second gear plate (522) further includes a plurality of spring members correspondingly arranged in the plurality of slots (5222); any of the spring members is located between the tooth portion (5223) and the bottom wall of the slot (5222), and is respectively connected to the tooth portion (5223) and the wall of the slot (5222).

6. The gas detection device according to claim 4, characterized in that: The surface of each tooth portion (5223) that is in the same direction as the second direction is an inclined surface (5224), and the surface of each tooth portion (5223) that is located on the opposite side of the inclined surface (5224) is a vertical surface (5225).

7. The gas detection device according to claim 3, characterized in that: The rotating shaft (31) and the screw rod (523) are arranged in parallel, and the rotating shaft (31) and the screw rod (523) are relatively fixed.

8. The gas detection device according to claim 1, characterized in that: The driving component comprises at least two first electromagnets (33) uniformly arranged on the periphery of the plurality of fan blades (32), and a plurality of magnetic blocks mounted on at least a portion of the plurality of fan blades (32); the at least two first electromagnets (33) generate magnetism by being energized, so as to cooperate with the plurality of magnetic blocks to drive the plurality of fan blades (32) to rotate.

9. The gas detection device according to claim 1, characterized in that: The plane in which the plurality of fan blades (32) rotate is parallel to the working surface (12), the vent hole (13) is formed on the working surface (12), and the gas sensor (2) is arranged between the mounting surface (11) and the plurality of fan blades (32).

10. The gas detection device according to claim 1, characterized in that: The camera assembly (4) includes an infrared camera.

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