Kitchen methane gas detection alarm device

Abstract

The invention belongs to the technical field of gas detection, and particularly relates to a kitchen methane gas detection alarm device which comprises a shell, a gas inlet bin is arranged in the shell, a gas chamber is fixedly communicated with the rear portion of the gas inlet bin, a detection alarm is arranged above the gas chamber, two sets of irradiators are arranged on the two sides of the detection alarm, and the irradiators are arranged in the gas inlet bin. A suction pump is arranged behind the gas chamber, a gas exchange groove is formed in front of the gas inlet bin, a gas inlet is detachably connected to the front of the shell, and an auxiliary assembly used for being matched with a detection alarm to detect and give an alarm to methane in kitchen gas is arranged in the gas exchange groove. By arranging a plurality of groups of filter screens in the mounting plate, gas about to enter the gas chamber can be filtered, impurities in kitchen gas can be prevented from polluting an optical device in the gas chamber, the accuracy of detecting the concentration of methane in the gas can be improved, and the optical device can be protected.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas detection, and specifically relates to a kitchen methane gas detection and alarm device. Background Art

[0002] Methane is the simplest hydrocarbon compound, composed of one carbon atom and four hydrogen atoms bonded by covalent bonds, with a molecular structure of a regular tetrahedron. It is the main component of natural gas and its main use in the kitchen is as a fuel.

[0003] When methane is used as a fuel in the kitchen, in case of pipeline aging, valve loosening, damaged seals of gas stoves or water heaters, aging or detachment of connecting hoses, etc., when the concentration of methane in the air reaches a certain threshold, it will explode when encountering an open flame, electric spark or high temperature, and the leakage and diffusion into an enclosed space (such as a cabinet) is likely to cause local deflagration. To ensure the safety of kitchen gas use, it is necessary to implement real-time monitoring of the methane concentration in the kitchen gas. By dynamically detecting the methane content, the leakage risk can be timely warned, and explosion or poisoning accidents caused by gas accumulation can be avoided.

[0004] Currently, in the existing technology, when dynamically detecting methane in some large kitchens, generally the infrared absorption detection method is used, which can ensure the accuracy of detecting the methane content in the gas. However, when dynamically detecting the gas in the kitchen, it is necessary to extract the gas. Since the impurity content in the kitchen gas is relatively high (oil fume, water vapor, etc.), directly extracting the gas will contaminate the optical detection device, thereby affecting the accuracy of methane gas detection. Therefore, the present invention provides a kitchen methane gas detection and alarm device. Summary of the Invention

[0005] In order to make up for the deficiencies of the existing technology and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A kitchen methane gas detection and alarm device of the present invention includes a housing. An air inlet chamber is installed inside the housing. A gas chamber is fixedly communicated behind the air inlet chamber. A detection alarm is arranged above the gas chamber. Two groups of irradiators are arranged on both sides of the detection alarm. A suction pump is arranged behind the gas chamber. A converter slot is opened in front of the air inlet chamber. An air inlet is detachably connected to the front of the housing. An auxiliary component for cooperating with the detection alarm to detect and alarm methane in the kitchen gas is configured inside the converter slot. The auxiliary component includes a cylinder. A moving plate is arranged at the output end below the cylinder. Both sides of the moving plate are rotatably connected to a connecting rod through a pin shaft. The other end of the connecting rod is rotatably connected to a mounting plate through a pin shaft. A filter screen is detachably connected inside the mounting plate, and the surface of the filter screen is arc-shaped. A limiting strip is arranged outside the filter screen. One side of the limiting strip is in sliding contact with a pressing rotating rod, and a convex strip is fixedly connected to the surface of the pressing rotating rod.

[0007] Preferably, a matching rod is fixedly connected below the moving plate. A plurality of collecting strips are also arranged outside the filter screen. The collecting strips are detachably connected to the mounting plate. The moving plate drives a plurality of mounting plates to slide inside the exchanger groove through the connecting rod. The pressing rotating rod drives the limiting strip to clamp and limit both sides of the filter screen through the convex strip.

[0008] Preferably, air chamber windows are opened on both sides of the air chamber. An irradiator is arranged outside the air chamber windows. Grooves are opened inside the collecting strips. A sealing gasket is arranged at the contact position between the collecting strips and the filter screen. The pressing rotating rod is threadedly connected to the mounting plate, and the limiting strip is slidably connected to the mounting plate.

[0009] Preferably, a filter bin is arranged in front of the cylinder. A motor is fixedly connected inside the filter bin. A transmission shaft is fixedly connected to the output end of the motor. A fan blade is fixedly connected to one end of the transmission shaft. A plurality of connecting plates are fixedly connected to the surface of the transmission shaft. A scraper is detachably connected to one end of the connecting plate. A filter pad is arranged in front of the filter bin.

[0010] Preferably, the transmission shaft drives a plurality of scrapers to rotate inside the filter bin through the connecting plates. The scraper is made of an adsorbent material. The filter bin is fixedly and communicatively connected to the inside of the air inlet. The scraper is arc-shaped.

[0011] Preferably, a honeycomb plate is also fixedly connected inside the air inlet chamber. A plurality of guide plates are fixedly connected to the surface of one side of the honeycomb plate close to the exchanger groove direction. A plurality of conical holes are opened inside the honeycomb plate, and the diameter of the hole in front of the conical hole is smaller than that of the hole at the back.

[0012] Preferably, the cavity inside the air inlet chamber is arranged in a stepped shape, and the cavity area is smaller at the position close to the exchanger groove and larger at the position far from the exchanger groove. The guide plates are arc-shaped in front of the honeycomb plate.

[0013] Preferably, the mating rod is located directly above the two mounting plates and outside the connecting rod. The two ends of the mating rod are tapered. The arc surface of the filter net installed near the converter slot is vertically arranged, and the arc surface of the filter net installed away from the converter slot is horizontally arranged. The two collecting strips are installed in parallel inside the mounting plate, and the two collecting strips are installed vertically inside the mounting plate.

[0014] Preferably, a quartz glass for irradiating infrared light by an auxiliary irradiator is installed inside the air chamber window. A return spring is arranged at the sliding position of the limiting strip inside the mounting plate, and a sealing gasket is also arranged on the contact surface between the limiting strip and the filter net.

[0015] Preferably, the motor drives the fan blade to rotate inside the filter chamber through a transmission shaft. The connecting plate is arranged obliquely at a certain angle on the surface of the transmission shaft. The scraping plate at one end of the connecting plate is vertically arranged, and the diameter of the rotation circumference of the scraping plate is larger than the diameter of the rotation circumference of the fan blade.

[0016] The beneficial effects of the present invention are as follows: 1. For the kitchen methane gas detection and alarm device of the present invention, by arranging multiple filter nets inside the mounting plate, it can filter the gas about to enter the air chamber, avoid impurities in the kitchen gas from polluting the optical device inside the air chamber, improve the accuracy of detecting the methane concentration in the gas, and protect the optical device.

[0017] 2. For the kitchen methane gas detection and alarm device of the present invention, through the arrangement of the honeycomb plate and multiple guide plates, it can make the gas flow into the air chamber in a stable state after being filtered, avoid too large fluctuations generated when the gas flows, affect the accuracy of the detection alarm for detecting it, and further improve the accuracy of detecting the methane concentration in the kitchen gas, facilitating the detection alarm to give an alarm in time after detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is a schematic diagram of the internal structure of the present invention with part of the outer shell removed; Figure 3 is a schematic diagram of the internal structure of the present invention with part of the filter chamber and the air inlet chamber removed; Figure 4 is in the present invention Figure 3 schematic diagram of another perspective structure; Figure 5 is a schematic diagram of the auxiliary component structure of the present invention; Figure 6 It is a schematic structural diagram of the mounting plate in the present invention; Figure 7 It is a schematic structural diagram of the filter screen in the present invention; Figure 8 It is a schematic structural diagram of the convex strip and the limiting strip in the present invention; Figure 9 It is a schematic structural diagram of the groove in the present invention; Figure 10 It is a schematic internal structural diagram of the filter chamber in the present invention; Figure 11 It is a schematic structural diagram of the honeycomb plate and the guide plate in the present invention; Figure 12 It is a schematic structural diagram of the irradiator and the air chamber window in the present invention; In the figure: 1. Outer shell; 2. Air inlet; 3. Air chamber; 4. Irradiator; 5. Air inlet chamber; 6. Filter chamber; 601. Motor; 602. Transmission shaft; 603. Connecting plate; 604. Scraper; 605. Filter pad; 606. Fan blade; 7. Cylinder; 701. Moving plate; 702. Connecting rod; 703. Mounting plate; 704. Filter screen; 705. Matching rod; 706. Extrusion rotating rod; 707. Collection strip; 708. Limiting strip; 709. Groove; 710. Convex strip; 8. Honeycomb plate; 801. Conical hole; 9. Guide plate; 10. Air chamber window; 11. Converter slot; 12. Detection alarm; 13. Suction pump. Detailed implementation manners

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0021] As Figures 1 to 6 shown, a kitchen methane gas detection and alarm device according to an embodiment of the present invention includes an outer shell 1, an air inlet chamber 5 is installed inside the outer shell 1, a gas chamber 3 is fixedly communicated behind the air inlet chamber 5, a detection alarm 12 is arranged above the gas chamber 3, two groups of irradiators 4 are arranged on both sides of the detection alarm 12, a suction pump 13 is arranged behind the gas chamber 3, a converter slot 11 is opened in front of the air inlet chamber 5, and an auxiliary component for cooperating with the detection alarm 12 to detect and alarm methane in kitchen gas is configured inside the converter slot 11; The auxiliary component includes a cylinder 7. A moving plate 701 is arranged at the output end below the cylinder 7. Both sides of the moving plate 701 are rotatably connected to a connecting rod 702 through a pin shaft. The other end of the connecting rod 702 is rotatably connected to a mounting plate 703 through a pin shaft. A filter screen 704 is detachably connected inside the mounting plate 703, and the surface of the filter screen 704 is arc-shaped. A limiting strip 708 is arranged outside the filter screen 704. One side of the limiting strip 708 is in sliding contact with a pressing rotating rod 706, and a convex strip 710 is fixedly connected to the surface of the pressing rotating rod 706.

[0022] The present invention takes into account that when detecting the methane content in the gas in the kitchen, the infrared absorption method is generally used for detection. At this time, if the kitchen gas is directly pumped by the suction pump 13 and the gas is drawn into the interior of the gas chamber 3 through the air inlet 2 for detection, due to the interference of oil fume, dust particles, water vapor, etc. in the impurities, it will cause pollution to the optical device, affect the irradiation path of the infrared light, reduce the accuracy of the detection alarm 12 for detecting the methane concentration in the gas, and the detection effect is low. It is necessary to install a filter material to filter the impurities in the gas. Therefore, when it is necessary to filter the impurities in the gas, first install the air inlet 2 in front of the housing 1 to facilitate filtering the particulate matter in the gas. At the same time, since the air inlet 2 is detachably connected to the front of the housing 1, it can be quickly replaced during use, which can effectively improve the replacement efficiency. It should be noted that after the larger particulate impurities are filtered, the gas will enter the interior of the air inlet chamber 5. However, since there are still other impurities in the gas, when the gas enters the interior of the air inlet chamber 5, it will first contact the filter screen 704 installed inside the mounting plate 703. At this time, multiple filter screens 704 can filter the gas again sufficiently. And since the front of the air inlet chamber 5 is arc-shaped, when the gas enters the interior of the air inlet chamber 5, it will be guided to the surface of the filter screen 704, so that the gas contacts its surface evenly, thus facilitating the filter screen 704 to filter it again, which can further improve the effect of filtering the gas. It should be further noted that after the gas is filtered through the surface of the filter net 704, impurities in the gas will adhere to the surface of the filter net 704. At this time, the filter net 704 needs to be replaced to ensure the quality of gas filtration. Therefore, the cylinder 7 drives the moving plate 701 to move downward. The movement of the moving plate 701 can drive the connecting rod 702 to swing, and the swing of the connecting rod 702 can push the mounting plate 703 to slide laterally inside the exchanger slot 11. At this time, the mounting plate 703 can drive the filter net 704 to slide outward. When the mounting plate 703 drives the filter net 704 to move to a suitable position, the user rotates the extrusion rod 706 to drive the convex strip 710 to rotate, so that the surface of the convex strip 710 no longer contacts the limiting strip 708. At this time, the limiting strip 708 will slide outward inside the mounting plate 703, and the limiting strip 708 will no longer clamp both sides of the filter net 704. At this time, the user can directly push the filter net 704 to remove it, which can quickly replace the filter net 704 and effectively improve the effect of replacing the filter net 704; It should be noted again that when the gas blows onto the surface of the filter net 704, although the gas can be fully filtered by the filter net 704, in order to avoid the gas concentrating on the surface of the filter net 704 and causing a situation of concentrated filtration at a certain place on its surface, which affects the overall gas filtration effect. Therefore, the surface of the filter net 704 is set in an arc shape. When the gas contacts the surface of the filter net 704, while the filter net 704 filters the impurities in the gas, it will also guide the gas to its two sides, which can avoid the gas concentrating on the filter net 704 when entering, causing impurities to concentrate and adhere to a certain position on its surface, resulting in the blockage of the filter net 704. It can make the gas be filtered evenly, improve the filtration effect, and effectively avoid unfiltered gas entering the gas chamber 3 and contaminating the optical device, affecting the detection effect of the detection alarm 12; When the filtered gas enters the gas chamber 3, the irradiator 4 will start to irradiate infrared light at this time, and at the same time, the detection alarm 12 can detect the gas passing through the gas chamber 3, can monitor the concentration of methane in the gas in real time, and give an alarm in time.

[0023] As Figures 5 to 8 shown, a matching rod 705 is fixedly connected below the moving plate 701, and multiple groups of collecting strips 707 are also arranged outside the filter net 704. The collecting strips 707 are detachably connected to the mounting plate 703. The moving plate 701 drives multiple groups of mounting plates 703 to slide inside the exchanger slot 11 through the connecting rod 702, and the extrusion rod 706 drives the limiting strip 708 to clamp and limit both sides of the filter net 704 through the convex strip 710.

[0024] During operation, when the gas is directed to both sides of the filter screen 704, there will still be certain impurities in the gas moving towards both sides along with the gas. At this time, part of the gas will be blown into the interior of the collection strip 707. When the gas is blown into the interior of the collection strip 707, it will be filtered by the collection strip 707. And since the collection strip 707 covers both sides of the filter screen 704 and is trapezoidally arranged, the impurities in the gas blown towards both sides will be adsorbed by the collection strip 707, which can improve the gas filtration effect. It should be noted that since the surface of the filter screen 704 is arc-shaped, when the gas blows rapidly onto its surface, most of the gas will be directed to both sides. Therefore, most of the impurities will come into contact with the surface of the filter screen 704 when flowing along with the gas, and thus be adsorbed by the filter screen 704. When the gas flows to the position of the collection strip 707, only a small part of the gas will come into contact with the collection strip 707, thereby filtering the gas. Therefore, the impurities in the gas can be fully filtered by the filter screen 704 and the collection strip 707, and some of the filtered impurities will also be attached and collected by the collection strip 707, with a good filtration effect. It should be further noted that when a new filter screen 704 needs to be installed into the interior of the mounting plate 703, first install the clean collection strip 707 into the interior of the mounting plate 703, and then insert both ends of the filter screen 704 into the interior of the collection strip 707 so that it is located at the position of the mounting plate 703. When both are installed, rotate the extrusion rod 706 to drive the convex strip 710 to rotate. The rotation of the convex strip 710 can squeeze the limiting strip 708, making one side of the limiting strip 708 contact with one side of the filter screen 704, and the limiting strip 708 squeezes one end of the filter screen 704, which can effectively improve the stability of the filter screen 704 installed in the interior of the mounting plate 703 and can also assist the user in quickly replacing the filter screen 704, with high working efficiency.

[0025] As Figure 2 and Figures 7 to 9 shown, air chamber windows 10 are provided on both sides of the air chamber 3. An irradiator 4 is provided outside the air chamber windows 10. A groove 709 is provided inside the collection strip 707. A sealing gasket is provided at the contact position between the collection strip 707 and the filter screen 704. The extrusion rod 706 is threadedly connected to the mounting plate 703, and the limiting strip 708 is slidably connected to the mounting plate 703.

[0026] During operation, when the filtered gas flows into the interior of the air chamber 3, only need to start the irradiator 4 to irradiate infrared light at this time. The infrared light will irradiate into the interior of the air chamber 3 through the air chamber windows 10 to irradiate the gas inside the air chamber 3. At the same time, start the detection alarm 12 to detect the gas irradiated with infrared light at this time, which can facilitate the detection of the methane concentration in the gas. It should be noted that when part of the gas is guided to the collection strips 707 on both sides by the surface of the filter net 704, in order to prevent the gas from discharging from the connection position between the two at this time, by setting a sealing gasket at the contact position between the two, the sealing performance during the overall filtration of the gas can be effectively improved, avoiding that some impurities cannot be filtered, thereby contaminating the optical device inside the gas chamber 3. And because a groove 709 is opened inside the collection strip 707, when part of the gas is guided into the collection strip 707, due to the arc-shaped opening of the groove 709, when the gas enters the groove 709, it will be quickly discharged and contact the surface of the collection strip 707 or the filter net 704, thereby further improving the filtering effect of impurities in part of the gas, and preventing the gas from being "blocked" by the collection strip 707 after contacting the collection strip 707, and "convection" occurring between the gas transported in the air inlet chamber 5, so as to blow off the impurities filtered by the filter net 704, and further improve the filtering effect of the filter net 704 on impurities in the gas; It should be further noted that when disassembling and installing the filter net 704, since the extrusion rod 706 and the mounting plate 703 are threadedly connected, when the extrusion rod 706 rotates, it will also drive the entire rib 710 to move up and down, which can avoid the rib 710 directly contacting one side of the limiting strip 708, making the limiting strip 708 slowly contact or loosen from one side of the filter net 704, and can avoid the filter net 704 shaking or shifting in the mounting plate 703 without limitation when quickly loosening, resulting in impurities falling off from the surface of the filter net 704. It can also avoid the "rigid contact" between one side of the limiting strip 708 and one side of the filter net 704 when quickly clamping, damaging the filter net 704 and reducing its filtering effect, and can protect the filter net 704 and improve the filtering effect.

[0027] As Figures 3 to 4 and Figure 10 shown, a filter chamber 6 is provided in front of the cylinder 7. A motor 601 is fixedly connected inside the filter chamber 6. The output end of the motor 601 is fixedly connected to a transmission shaft 602. One end of the transmission shaft 602 is fixedly connected to a fan blade 606. Multiple connecting plates 603 are fixedly connected to the surface of the transmission shaft 602. One end of the connecting plate 603 is detachably connected to a scraper 604. A filter pad 605 is provided in front of the filter chamber 6.

[0028] During operation, when the suction pump 13 extracts external gas, since the gas needs to flow inside the air inlet chamber 5, in order to improve the fluidity of the gas inside it, facilitate the filtration of the gas, and at the same time improve the detection efficiency of the detection alarm 12 for it, therefore, by starting the motor 601 to drive the transmission shaft 602 to rotate, the rotation of the transmission shaft 602 can drive the fan blade 606 to rotate, and the rotation of the fan blade 606 can blow the gas to make it flow quickly. At this time, through the cooperation of the fan blade 606 and the suction pump 13, the external gas can quickly enter the air inlet chamber 5, the gas can be filtered in a fast-flowing state, and the fluidity of the gas inside the air inlet chamber 5 can be improved; It should be noted that when the gas blows towards the corner in front of the air inlet chamber 5 through the fan blade 606, the fluidity of the gas is very high at this time. Therefore, the gas can fully contact the surface of the filter net 704 and be filtered by it. Moreover, before the gas enters the filter chamber 6 through the air inlet 2, it will be pre-filtered by the filter pad 605, which can prevent the large-particle impurities from being incompletely filtered by the air inlet 2 and adhering to the surface of the fan blade 606 after entering the filter chamber 6, which can effectively improve the efficiency of the fan blade 606 in transporting the gas. And since a scraper 604 is provided at one end of the connecting plate 603, when the connecting plate 603 drives the scraper 604 to rotate, even if some large-particle impurities are not filtered by the filter pad 605, the rapid rotation of the scraper 604 at this time can adsorb and collect the impurities floating inside the filter chamber 6, which can further improve the gas filtration effect.

[0029] As Figure 10 shown, the transmission shaft 602 drives a plurality of groups of scrapers 604 to rotate inside the filter chamber 6 through the connecting plate 603. The scraper 604 is made of an adsorbent material. The filter chamber 6 is fixedly connected and communicated with the inside of the air inlet 2. The scraper 604 is arranged in an arc shape.

[0030] During operation, since a plurality of groups of scrapers 604 are arranged in an arc shape, when the transmission shaft 602 drives the scraper 604 to rotate through the connecting plate 603, at this time, due to the arc-shaped arrangement of the scraper 604, the impurities floating inside the filter chamber 6 due to its rotation can be collected to the concave surface. It should be noted that when the impurities are collected, the scraper 604 is still rotating rapidly, and the impurities will be in close contact with the centrifugal force generated by the rotation of the scraper 604, which can prevent the impurities from falling onto the surface of the lower fan blade 606 when the scraper 604 stops rotating, affecting the efficiency of the fan blade 606 in transporting the gas. At the same time, it can improve the concentration of the impurities collected by the concave surface of the scraper 604, which is convenient for subsequent users to clean or replace the scraper 604, and will not cause secondary pollution to the air inlet chamber 5 and the fan blade 606 by the collected impurities, and can improve the overall gas filtration effect.

[0031] AsFigures 3 to 4 and Figure 11 As shown in Figure 11 , a honeycomb plate 8 is further fixedly connected inside the air inlet chamber 5. A plurality of guide plates 9 are fixedly connected to one side surface of the honeycomb plate 8 close to the direction of the converter groove 11. A plurality of tapered holes 801 are formed inside the honeycomb plate 8, and the diameter of the hole in front of the tapered hole 801 is smaller than that of the hole behind.

[0032] The present invention also takes into account that when the gas flows through multiple filters and into the interior of the air chamber 3, the gas will first be filtered through the surfaces of the two-layer filter net 704 under the blowing of the fan blades 606 and the suction of the suction pump 13. At this time, the impurities in the gas are fully filtered out. However, since the gas will be in an unstable state after passing through the filter net 704, and if the gas directly flows into the interior of the air chamber 3 and is detected by the detection alarm 12 at this time, the instability of the gas will cause the detection alarm 12 to fail to capture the instantaneous high-concentration methane peak, resulting in delayed alarm. Therefore, by installing a honeycomb plate 8 inside the air inlet chamber 5 and arranging a plurality of guide plates 9 in front of the honeycomb plate 8, when the filtered gas flows through the filter net 704 and into the interior of the air chamber 3, the gas will be shunted by the plurality of guide plates 9 at this time, so that the gas flows to the surface of the honeycomb plate 8 and flows into the interior of the air chamber 3 through the plurality of tapered holes 801 formed on the surface of the honeycomb plate 8, enabling the gas to flow through the interior of the air chamber 3 in a stable state, which can improve the accuracy of detection by the detection alarm 12; It should be noted that when the gas is shunted by the guide plates 9 and flows to the surface of the honeycomb plate 8, the gas will come into contact with the surface of the guide plates 9 at this time, and the friction between the two will increase, thereby reducing the flow rate of the gas inside the air inlet chamber 5 and making it contact the surface of the honeycomb plate 8 stably. However, before the gas is delivered into the interior of the air chamber 3 through the tapered holes 801, since the diameter of the hole in front of the tapered hole 801 is smaller than that of the hole behind, the gas will enter through the small-diameter hole first and then discharge from the large-diameter hole when passing through the tapered holes 801, which can enable the gas to be discharged in a "dispersed jet" state, enabling the gas to fully maintain stability and thus filling the entire interior of the air inlet chamber 5. At this time, the gas can flow smoothly from the position of the air inlet chamber 5 into the interior of the air chamber 3, facilitating the detection by the detection alarm 12, and the filtered gas can effectively prevent pollution to the optical device, improving the detection accuracy of the detection alarm 12.

[0033] As Figures 3 to 4 shown, the cavity inside the air inlet chamber 5 is arranged in a stepped shape, and the cavity area is smaller near the position of the converter groove 11 and larger at the position far from the converter groove 11. The guide plates 9 are arranged in an arc shape in front of the honeycomb plate 8.

[0034] During operation, when the gas is discharged to the connection position between the gas chamber 3 and the intake chamber 5 through the position of the conical hole 801, since the conical hole 801 is conically arranged and the gas flows from the "small cavity" to the "large cavity" at this time, when the gas is discharged to the connection position between the gas chamber 3 and the intake chamber 5 in a "dispersed jet" state, the gas will be located at the position of the "large cavity" inside the intake chamber 5 at this time, which can make the gas flow more smoothly into the inside of the gas chamber 3, gently transport the gas, effectively avoid errors in the detection of the methane concentration in the gas by the detection alarm 12, and further improve the detection of the methane concentration to improve the accuracy of the alarm.

[0035] As Figures 5 to 7 shown, the mating rod 705 is located directly above the two mounting plates 703 and outside the connecting rod 702. The two ends of the mating rod 705 are conically arranged. The arc surface of the filter net 704 installed near the converter slot 11 is vertically arranged, and the arc surface of the filter net 704 installed away from the converter slot 11 is horizontally arranged. The two collecting strips 707 are installed in parallel inside the mounting plate 703, and the two collecting strips 707 are installed vertically inside the mounting plate 703.

[0036] During operation, when the filter net 704 is disassembled and replaced, the two mounting plates 703 will move outward at this time. However, when the mounting plate 703 moves to a suitable position, the two filter nets 704 will no longer be in contact at this time. The inside of the intake chamber 5 will be directly in contact with the outside air, and at this time the filter net 704 will no longer filter the gas, and the outside gas will directly enter the inside of the intake chamber 5, which is likely to contaminate the optical device inside the gas chamber 3. Therefore, by arranging the mating rod 705 above the mounting plate 703, when the mounting plate 703 moves outward, the mating rod 705 will move downward to fill the gap between the two mounting plates 703, so that the inside of the intake chamber 5 is always in a sealed state, and the optical device can be effectively protected; It should be further noted that by arranging multiple mounting plates 703 inside the converter slot 11 and installing multiple filter nets 704 inside the mounting plate 703, not only can the effect of gas filtration be effectively improved, but also by arranging multiple collecting strips 707 outside the filter net 704, the gas can be "guided" in multiple directions on the surface of the filter net 704, so that the gas flows evenly to the position of the honeycomb plate 8, which is convenient for the guide plate 9 to shunt it, and at the same time improves the smoothness of the conical hole 801 for discharging the filtered gas, and can effectively improve the detection and alarm effect of the detection alarm 12 for the smooth gas.

[0037] As Figure 12As shown, a quartz glass for irradiating infrared light by an auxiliary irradiator 4 is installed inside the air chamber window 10. A return spring is arranged at the sliding position of the limiting strip 708 inside the mounting plate 703, and a sealing gasket is also arranged at the contact surface between the limiting strip 708 and the filter net 704.

[0038] During operation, by installing quartz glass inside the air chamber window 10, when the gas flows smoothly through the inside of the air chamber 3, the infrared light irradiated by the irradiator 4 can fully pass through the glass and irradiate into the inside of the air chamber 3, and is reflected multiple times by multiple groups of reflectors arranged inside the air chamber 3, thereby forming a long optical path inside the air chamber 3, which is convenient for the detection alarm 12 to detect the methane concentration in the gas. It should be noted that in order to avoid gas leakage when the gas passes through multiple groups of filter nets 704, since the limiting strip 708 will directly contact the side surface of the filter net 704 and clamp and limit it, although it can assist the staff in quickly disassembling and installing the filter net 704, there may be gaps between the limiting strip 708 and the filter net 704, resulting in gas leakage. Therefore, a sealing gasket is installed at the contact position between the limiting strip 708 and the side surface of the filter net 704, which can effectively prevent gas leakage and can effectively protect the side surface of the filter net 704, avoiding excessive clamping of the filter net 704, and having good protection.

[0039] As Figure 10 shown, the motor 601 drives the fan blade 606 to rotate inside the filter chamber 6 through the transmission shaft 602. The connecting plate 603 is arranged obliquely at a certain angle on the surface of the transmission shaft 602. The scraping plate 604 at one end of the connecting plate 603 is arranged vertically, and the rotation circumference diameter of the scraping plate 604 is larger than the rotation circumference diameter of the fan blade 606.

[0040] During operation, when the fan blade 606 rotates to convey the gas, it can make the gas rapidly cover the surface of the filter net 704, enabling the filter net 704 to uniformly filter the gas. And since the connecting plate 603 is fixedly arranged obliquely at a certain angle on the surface of the transmission shaft 602, at this time, the rotation of multiple groups of connecting plates 603 can also rotate as a small "fan blade 606", and the rotation circumference diameter of the scraping plate 604 is larger than the rotation circumference diameter of the fan blade 606, that is, the rotation diameter of the connecting plate 603 is larger than the rotation diameter of the fan blade 606. Therefore, at this time, the rotation of the connecting plate 603 can further improve the gas conveying efficiency, making it flow rapidly into the intake chamber 5, which is convenient for the subsequent detection alarm 12 to detect and alarm, and has good real-time monitoring effect; It should be noted that since the connecting plate 603 is inclined and the scraper 604 is vertically arranged, when the connecting plate 603 rotates to convey gas, the scraper 604 will always be in a vertical state, which facilitates the scraper 604 to collect the impurities not filtered by the filter pad 605 in the gas, effectively improving the collection quality of the scraper 604 and preventing large-particle impurities from falling to the position of the fan blade 606, thus affecting the gas conveyance efficiency.

[0041] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A kitchen methane gas detection and alarm device, characterized in that: The invention comprises a shell, wherein an air inlet bin is arranged inside the shell, an air chamber is fixedly connected to the rear of the air inlet bin, a detection alarm is arranged above the air chamber, two groups of irradiators are arranged on both sides of the detection alarm, a suction pump is arranged behind the air chamber, a changer slot is arranged in front of the air inlet bin, an air inlet port is detachably connected to the front of the shell, and an auxiliary component for cooperating with the detection alarm to detect and alarm methane in the kitchen gas is arranged inside the changer slot; The auxiliary component includes a cylinder, a movable plate is provided at the output end below the cylinder, both sides of the movable plate are rotatably connected with connecting rods through pins, the other end of the connecting rod is rotatably connected with a mounting plate through a pin, a filter screen is detachably connected to the inside of the mounting plate, and the surface of the filter screen is arranged in an arc shape, a limit strip is provided on the outside of the filter screen, one side of the limit strip is in sliding contact with an extrusion rotating rod, and a convex strip is fixedly connected to the surface of the extrusion rotating rod.

2. A kitchen methane gas detection alarm device according to claim 1, characterized in that: A matching rod is fixedly connected to the bottom of the movable plate, and multiple groups of collecting strips are arranged on the outside of the filter screen. The collecting strips are detachably connected to the mounting plate. The movable plate drives the multiple groups of mounting plates to slide inside the converter slot through connecting rods, and the extrusion rotating rod drives the limit strips through convex strips to clamp and limit the two sides of the filter screen.

3. A kitchen methane gas detection alarm device according to claim 2, characterized in that: Air chamber windows are provided on both sides of the air chamber, an irradiator is provided on the outside of the air chamber window, a groove is provided inside the collecting strip, a sealing gasket is provided at the contact position between the collecting strip and the filter screen, the extrusion rotating rod is threadedly connected to the mounting plate, and the limit strip is slidably connected to the mounting plate.

4. A kitchen methane gas detection alarm device according to claim 1, characterized in that: A filter bin is arranged in front of the cylinder, a motor is fixedly connected to the interior of the filter bin, a transmission shaft is fixedly connected to the output end of the motor, a fan blade is fixedly connected to one end of the transmission shaft, a plurality of connecting plates are fixedly connected to the surface of the transmission shaft, a scraper is detachably connected to one end of the connecting plate, and a filter pad is arranged in front of the filter bin.

5. A kitchen methane gas detection alarm device according to claim 4, characterized in that: The transmission shaft drives multiple groups of scrapers to rotate inside the filter bin through the connecting plate. The scrapers are made of adsorption material. The filter bin is fixedly connected to the inside of the air inlet, and the scrapers are arranged in an arc shape.

6. A kitchen methane gas detection alarm device according to claim 1, characterized in that: A honeycomb plate is also fixedly connected to the interior of the air intake bin, and a plurality of guide plates are fixedly connected to the surface of the honeycomb plate on one side close to the converter slot. A plurality of conical holes are provided inside the honeycomb plate, and the diameter of the hole in front of the conical hole is smaller than the diameter of the hole at the rear.

7. A kitchen methane gas detection and alarm device according to claim 6, characterized in that: The cavity inside the air inlet bin is arranged in a stepped manner, and the cavity area is smaller at a position close to the converter slot and larger at a position far from the converter slot. The guide plate is arranged in an arc shape in front of the honeycomb plate.

8. A kitchen methane gas detection alarm device according to claim 2, characterized in that: The matching rod is located directly above the two groups of mounting plates and on the outside of the connecting rod. The two ends of the matching rod are arranged in a conical shape. The arc surface of the filter installed close to the converter slot is arranged vertically, and the arc surface of the filter installed away from the converter slot is arranged horizontally. The two groups of collecting strips are installed in parallel inside the mounting plate, and the two groups of collecting strips are installed vertically inside the mounting plate.

9. A kitchen methane gas detection alarm device according to claim 3, characterized in that: A quartz glass for assisting the irradiator in irradiating infrared light is installed inside the air chamber window, a return spring is arranged at the sliding position of the limit bar inside the mounting plate, and a sealing gasket is also arranged on the contact surface between the limit bar and the filter screen.

10. A kitchen methane gas detection alarm device according to claim 4, characterized in that: The motor drives the fan blades to rotate inside the filter bin through the transmission shaft. The connecting plate is inclined at a certain angle on the surface of the transmission shaft. The scraper at one end of the connecting plate is vertically arranged. The rotation circumference diameter of the scraper is larger than the rotation circumference diameter of the fan blades.

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