Gas alarm based on low-power-consumption wireless passive sensor network

Abstract

The invention belongs to the technical field of gas alarms, and particularly relates to a gas alarm based on a low-power-consumption wireless passive sensor network, which comprises a box body, the box body comprises a cover plate and a shell, and a water supply assembly and a smoke inlet assembly are arranged in the shell; the smoke inlet assembly comprises a smoke removal barrel, a smoke pipe and a sewage draining exit, and the water supply assembly is connected with the rotary spraying assembly. Water mist is sprayed into the smoke removal barrel through the atomization spray head, water mist forms a water film on the inner wall of the smoke removal barrel, gaseous organic matter in the smoke is dissolved in the water mist along with entering of the smoke removal barrel, particulate matter in the smoke is flushed downwards by the water mist sprayed downwards, and particulate matter which is not flushed away by the water mist is attached to the water film on the inner wall of the smoke removal barrel. Along with continuous downward spraying of the water mist, the water mist gathers beads on a water film on the inner wall of the smoke removal barrel and drives lampblack particles on the water film to flush downwards, the lampblack particles are prevented from being attached to the inner wall of the smoke removal barrel, the inner wall of the smoke removal barrel does not need to be cleaned and maintained, time and labor are saved, and the use efficiency of equipment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of gas alarms, and in particular relates to a gas alarm based on a low-power wireless passive sensor network. Background Art

[0002] A gas alarm is a device that detects gas leaks and sounds an alarm. It is used to detect gas leaks in industrial plants and home kitchens. In order to take into account the factors of oil smoke, kitchen gas alarms are usually installed near the valve of the gas pipeline. Oil smoke is mainly a large amount of thermal oxidation decomposition products produced by cooking oil and food under high temperature conditions. The components of oil smoke gas mainly include particulate matter and gaseous organic matter. Gaseous organic matter is soluble in water, and particulate matter is not only soluble in water but also sticky.

[0003] The most frequent occurrence of household gas leakage accidents is that when something is stewed, the liquid in the pot overflows from the pot and extinguishes the flame of the gas stove, while the gas is still being released. The gas alarm installed near the gas pipeline valve is far away from the stove. Such an installation method will cause the entire kitchen to be filled with a large amount of combustible gas when the alarm is triggered. Therefore, it is very important to install the alarm near the stove. In order to solve the impact of oil smoke on the alarm, the oil smoke is usually filtered through water and passed into the water pipe. The oil smoke is filtered based on the principle that natural gas and coal gas are insoluble in water and will not liquefy under atmospheric pressure and room temperature. For example, a combustible gas alarm with publication number CN115909670A, but only the gaseous organic matter in the oil smoke dissolves in water and forms an oil film on the surface of the water, and the particulate matter in the oil smoke is insoluble in water and suspended on the surface of the water. Due to the viscosity of the particulate matter itself, the particulate matter is very easy to adhere to the pipe wall around the water surface. The particulate matter adhered to the pipe wall is very difficult to clean, and the water pipe needs to be specially disassembled and cleaned or replaced, which is time-consuming and laborious. Summary of the invention

[0004] The purpose of the present invention is to provide a gas alarm based on a low-power wireless passive sensor network to address the deficiencies in the prior art and to solve the technical problems in the prior art.

[0005] The object of the present invention can be achieved by the following technical solutions: A gas alarm based on a low-power wireless passive sensor network, comprising a box body, the box body comprising a cover plate and a shell, a water supply component and a smoke inlet component are installed inside the shell, a first air inlet and a second air inlet are provided on the cover plate, and an air inlet switching component for opening and closing the first air inlet and the second air inlet is installed on the cover plate; The smoke inlet assembly includes a smoke removal cylinder, a smoke pipe is installed on the smoke removal cylinder, a sewage outlet is installed at the bottom of the smoke removal cylinder, a water supply assembly is connected to a rotary spray assembly, the rotary spray assembly includes a static water pipe and a rotatable dynamic water pipe, the static water pipe and the dynamic water pipe are rotatably connected, an atomizing nozzle is installed on the dynamic water pipe, and the atomizing nozzle is located at the top of the smoke removal cylinder, a water storage assembly is installed outside the smoke inlet assembly, and the water storage assembly is connected to the water supply assembly; A fixing plate is installed inside the shell, a wireless mainboard is installed on the fixing plate, an infrared temperature measurement module and a gas sensor body are installed on the wireless mainboard respectively, and an exhaust hole is arranged on the top of the shell.

[0006] As a further optimization or improvement of the present solution, the air inlet switching assembly includes a first cylinder and a second cylinder, the output ends of the first cylinder and the second cylinder are respectively connected to a first baffle and a second baffle, the first baffle and the second baffle respectively block the first air inlet and the second air inlet, and the first cylinder and the second cylinder are respectively connected to a first air supply pump and a second air supply pump.

[0007] As a further optimization or improvement of the present solution, the water supply assembly includes a water supply tank and a liquid inlet pipe installed thereon, the liquid inlet pipe is connected to the still water pipe through a liquid inlet pump, the water inlet pipe is installed on the water supply tank, the water inlet pipe is connected to the water pipe, a temperature conduction plate is installed on the outer shell, and one side of the temperature conduction plate is attached to the water supply tank.

[0008] As a further optimization or improvement of the present solution, the rotary spraying assembly further comprises an electric motor, a driven gear is mounted on the moving water pipe, a driving gear is mounted on the output shaft of the electric motor, and the driving gear is meshed with the driven gear.

[0009] As a further optimization or improvement of the present solution, an air pump is installed on the smoke pipe, the smoke pipe is arranged at an angle, and the air inlet of the smoke pipe faces the second air inlet.

[0010] As a further optimization or improvement of this solution, a water storage assembly is installed outside the smoke inlet assembly, the water storage assembly includes a water inlet and a water tank, the water inlet is connected to the water supply tank, the water tank is sealed and installed outside the smoke removal tube, and the top of the water tank is higher than the smoke removal tube.

[0011] As a further optimization or improvement of this solution, a reciprocating screw sleeve is installed on the moving water pipe, a liquid pressure plate is vertically slidably installed inside the water tank, and the height of the liquid pressure plate is above the top of the smoke exhaust tube, the liquid pressure plate is connected to the transmission ring through a guide rod, and the transmission ring cooperates with the reciprocating screw sleeve for transmission.

[0012] As a further optimization or improvement of the present solution, sound insulation cotton is installed inside the shell and is filled on both sides of the water tank.

[0013] As a further optimization or improvement of the present solution, a ventilation plate is installed on the fixed plate, and the two sides of the ventilation plate are through-set, and the smoke removal funnel is connected with the fixed plate through the through-holes on both sides of the ventilation plate, and the motor is fixedly installed and the moving water pipe is rotatably installed on the ventilation plate. An exhaust hole is opened on the top of the outer shell, and the exhaust hole is located on the top of the wireless mainboard. A baffle is installed on the atomizing nozzle.

[0014] Beneficial effects of the present invention: (1) The present invention transports the water in the water supply tank to the static water pipe through the liquid inlet pump, and then sprays the water toward the inside of the smoke extractor through the atomizing nozzle. The atomized water forms a water film on the inner wall of the smoke extractor, and then the oil smoke is extracted into the smoke extractor through the vacuum pump. The gaseous organic matter of the oil smoke after entering the smoke extractor is dissolved in the water mist, and the particles in the oil smoke are washed downward by the water mist sprayed downward. The particles not washed away by the water mist adhere to the water film on the inner wall of the smoke extractor. As the water mist continues to spray downward, the water mist gathers on the water film on the inner wall of the smoke extractor and drives the oil smoke particles on the water film to rush downward, so that the oil smoke particles on the water film are discharged through the sewage outlet, thereby avoiding the oil smoke particles from adhering to the inner wall of the smoke extractor, and there is no need to clean and maintain the inner wall of the smoke extractor, which saves time and effort and improves the use efficiency of the equipment.

[0015] (2) When the present invention is in use, if the atomizing port on the atomizing nozzle is blocked, the atomizing area of ​​the atomizing nozzle is reduced, so that part of the inner wall of the smoke extractor cannot contact the water mist and cannot form a water film, which easily causes the oil fume particles to directly adhere to the inner wall of the smoke extractor. Therefore, when the atomizing nozzle of the present invention sprays water mist, the active gear drives the moving water pipe and the atomizing nozzle to rotate. Even if the atomizing port of the atomizing nozzle is blocked, the atomizing nozzle can drive the water mist to be evenly sprayed on the inner wall of the smoke extractor and form a water film through its own rotation, thereby improving the fault tolerance of the equipment and avoiding the situation where the oil fume particles are directly attached to the inner wall of the smoke extractor due to the blockage of the atomizing port on the atomizing nozzle.

[0016] (3) The present invention absorbs the heat near the stove through the heat conduction plate and conducts the heat to the water supply component, so that the water inside the water supply component has a certain temperature, and then transports the water inside the water supply component to the inside of the water tank through the water inlet. When the water inside the water tank reaches the top of the smoke extractor, the water supply component stops transporting the water into the water tank. At this time, the water inside the water tank conducts the temperature to the smoke extractor, so that the temperature of the smoke extractor increases. When the water mist is sprayed onto the inner wall of the smoke extractor, the surface tension of the water droplets in the water mist is reduced, and the water droplets in the water mist on the inner wall of the smoke extractor are easier to diffuse, so that the water mist sprayed on the inner wall of the smoke extractor can more easily form a uniform water film, thereby preventing the oil smoke particles from directly adhering to the inner wall of the smoke extractor.

[0017] (4) The present invention drives the water moving pipe and the atomizing nozzle to rotate through an electric motor, so that the reciprocating screw sleeve on the water moving pipe rotates synchronously with the water moving pipe, and the reciprocating screw sleeve is connected to the transmission ring through the transmission connection. The rotation of the reciprocating screw sleeve drives the guide rod and the liquid pressure plate to reciprocate and rise and fall; the water inside the water storage tank is pressed by the liquid pressure plate, so that the water overflows from the top of the smoke extractor, and the overflowing water is washed along the inner wall of the smoke extractor, and the oil smoke particles that are about to pass through the water film and adhere to the inner wall of the smoke extractor are directly washed away, so as to avoid the phenomenon that after a large amount of oil smoke enters the smoke extractor, the oil smoke particles pass through the water film and adhere to the inner wall of the smoke extractor, thereby ensuring the cleanliness of the inner wall of the smoke extractor. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall internal structure of the present invention.

[0021] Figure 3 Schematic diagram of the cover structure.

[0022] Figure 4 This is a schematic diagram of the overall structure of the air inlet switching component.

[0023] Figure 5 It is a schematic diagram of the connection structure between the water supply component and the water storage component.

[0024] Figure 6 It is a schematic diagram of the structure of the water supply component and the water storage component.

[0025] Figure 7 Schematic diagram of the smoke tube structure.

[0026] Figure 8 It is a cross-sectional view of the overall structure of the smoke inlet component and the water storage component.

[0027] Fig. 9 for Figure 8 A magnified view of the structure of part A.

[0028] Fig.10 It is a schematic diagram of the structure of the pressure plate.

[0029] The figure shows: 1. Box; 101. Shell; 102. Cover; 103. First air inlet; 104. Second air inlet; 105. Exhaust hole; 2. Heat conduction plate; 3. Air inlet switching assembly; 301. First cylinder; 302. Second cylinder; 303. First air supply pump; 304. Second air supply pump; 305. First baffle; 306. Second baffle; 4. Water supply assembly; 401. Water supply tank; 402. Water inlet pipe; 403. Liquid inlet pump; 404. Liquid inlet pipe; 5. Water storage assembly; 501. Water inlet; 502. Water storage tank; 6. Smoke inlet assembly; 601. Sewage outlet; 602. Smoke pipe; 603. Vacuum pump; 604. Smoke removal tube; 7. Infrared temperature measurement module; 8. Rotary spray assembly; 801. Still water pipe; 802. Motor; 803. Driving gear; 804. Driven gear; 805. Moving water pipe; 806. Reciprocating screw sleeve; 807. Transmission ring; 808. Guide rod; 809. Liquid pressure plate; 810. Atomizing nozzle; 811. Baffle; 812. Ventilation plate; 9. Sound insulation cotton; 11. Fixing plate; 12. Wireless main board; 13. Gas sensor body. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 7 , a gas alarm based on a low-power wireless passive sensor network, comprising a box body 1, the box body 1 comprising a cover plate 102 and a shell 101, a water supply component 4 and a smoke inlet component 6 are installed inside the shell 101, a first air inlet 103 and a second air inlet 104 are provided on the cover plate 102, and an air inlet switching component 3 for opening and closing the first air inlet 103 and the second air inlet 104 is installed on the cover plate 102; The smoke inlet assembly 6 includes a smoke removal cylinder 604, a smoke pipe 602 is installed on the smoke removal cylinder 604, a sewage outlet 601 is installed at the bottom of the smoke removal cylinder 604, the water supply assembly 4 is connected to the rotary spray assembly 8, the rotary spray assembly 8 includes a static water pipe 801 and a rotatable dynamic water pipe 805, the static water pipe 801 and the dynamic water pipe 805 are rotatably connected, an atomizing nozzle 810 is installed on the dynamic water pipe 805, and the atomizing nozzle 810 is located at the top of the smoke removal cylinder 604, and a water storage assembly 5 is installed on the outside of the smoke inlet assembly 6, and the water storage assembly 5 is connected to the water supply assembly 4; A fixing plate 11 is installed inside the housing 101 , a wireless mainboard 12 is installed on the fixing plate 11 , an infrared temperature measurement module 7 and a gas sensor body 13 are installed on the wireless mainboard 12 , and an exhaust hole 105 is opened on the top of the housing 101 .

[0032] It should be noted that a buzzer is also installed on the wireless motherboard 12. When the gas sensor body 13 on the wireless motherboard 12 detects that the combustible gas in the air exceeds the standard, the buzzer will operate and the alarm signal will be transmitted to the user's mobile device through the wireless motherboard 12, so that the user can monitor kitchen safety in real time.

[0033] The gas sensor body 13 is a wireless passive sensor, which captures radio frequency signals and converts them into electrical energy through the radio frequency receiver thereon. The gas sensor body 13 is different from the wireless passive sensors in the prior art in that an energy conversion device, namely a thermoelectric generator, is installed on the gas sensor body 13, which converts oil smoke and hot steam from cooking into electrical energy for the gas sensor body 13. Compared with the existing wireless passive sensors, the gas sensor body 13 of the present invention is more suitable for environments with heat sources such as kitchens, so that the gas sensor body 13 has higher energy-saving efficiency and lower power consumption than the prior art.

[0034] When the present invention is in use, the wireless mainboard 12 controls the second air supply pump 304 to pump air to the second air cylinder 302, and the second air cylinder 302 pushes the second baffle 306 to move, so that the first baffle 305 is separated from the blockage of the second air inlet 104. At this time, the second air inlet 104 is opened. Similarly, the wireless mainboard 12 controls the first air inlet 103 to be closed. The liquid inlet pump 403 is started, and the liquid inlet pump 403 transports the water in the water supply tank 401 to the static water pipe 801, and then transports the water to the atomizing nozzle 810 through the dynamic water pipe 805, and sprays the water toward the inside of the smoke removal tube 604 through the atomizing nozzle 810. The atomized water forms a water film on the inner wall of the smoke removal tube 604. At this time, the air pump 603 is running, and the air pump 603 extracts the oil smoke into the smoke removal tube 604 through the second air inlet 104 and the smoke pipe 602. When the oil smoke enters the smoke removal tube 604, the gaseous organic matter in the oil smoke dissolves in the water mist and passes through the sewage outlet 601. The particles in the oil fume are washed downward by the water mist sprayed downward, and the particles in the oil fume are washed away by the water mist. The particles not washed away by the water mist will adhere to the water film on the inner wall of the smoke removal tube 604. As the water mist is continuously sprayed downward, the water mist gathers on the water film on the inner wall of the smoke removal tube 604 and drives the oil fume particles on the water film to rush downward, so that the oil fume particles on the water film are discharged through the sewage outlet 601, thereby avoiding the attachment of oil fume particles to the inner wall of the smoke removal tube 604, and there is no need to clean and maintain the inner wall of the smoke removal tube 604, which saves time and effort and improves the utilization efficiency of the equipment. If the smoke inhaled from the smoke extractor 604 contains leaked natural gas, since natural gas is insoluble in water and is lighter than air, the leaked natural gas can float to the top of the smoke extractor 604. At this time, the gas sensor body 13 located on both sides of the top of the smoke extractor 604 can directly detect the leakage of natural gas, and the wireless motherboard 12 drives the buzzer to run, and the alarm signal is transmitted to the user's mobile device through the wireless motherboard 12 to remind the user of the gas leakage.

[0035] See also Figure 1-Figure 4 The air inlet switching assembly 3 includes a first cylinder 301 and a second cylinder 302, the output ends of the first cylinder 301 and the second cylinder 302 are respectively connected to a first baffle 305 and a second baffle 306, the first baffle 305 and the second baffle 306 respectively block the first air inlet 103 and the second air inlet 104, and the first cylinder 301 and the second cylinder 302 are respectively connected to a first air supply pump 303 and a second air supply pump 304.

[0036] It should be noted that the present invention is divided into two states when in use; The first state is that the first air inlet 103 is open, that is, nothing is being heated or stewed on the stove, the wireless mainboard 12 controls the first air supply pump 303 to pump air into the first cylinder 301, the first cylinder 301 pushes the first baffle 305 to move, so that the first baffle 305 is separated from the blockage of the first air inlet 103, and the first air inlet 103 is open. If there is a gas leak, the leaked gas can directly enter the box 1 through the first air inlet 103 and be detected by the gas sensor body 13; The second state is that the first air inlet 103 is closed and the second air inlet 104 is open. When the infrared temperature measurement module 7 detects that the temperature is rising, the wireless mainboard 12 controls the second air supply pump 304 to pump air to the second cylinder 302, and the second cylinder 302 pushes the second baffle 306 to move, so that the first baffle 305 is separated from the blockage of the second air inlet 104. At this time, the second air inlet 104 is opened. Similarly, the wireless mainboard 12 controls the first air inlet 103 to be closed, and the exhaust pump 603 draws the oil smoke into the smoke removal tube 604 through the second air inlet 104 and the smoke pipe 602. The oil smoke entering the smoke removal tube 604 is flushed downward by the water mist sprayed downward, thereby realizing the function of removing gaseous organic matter and particulate matter in the oil smoke.

[0037] See also Figure 2-Figure 5 The water supply assembly 4 includes a water supply box 401 and a liquid inlet pipe 404 installed thereon, the liquid inlet pipe 404 is connected to the static water pipe 801 through a liquid inlet pump 403, a water inlet pipe 402 is installed on the water supply box 401, the water inlet pipe 402 is connected to the water pipe, a heat conduction plate 2 is installed on the outer shell 101, and one side of the heat conduction plate 2 is attached to the water supply box 401.

[0038] Specifically, the water storage component 5 is installed outside the smoke inlet component 6, and the water storage component 5 includes a water inlet 501 and a water tank 502. The water inlet 501 is connected to the water supply tank 401. The water tank 502 is sealed and installed outside the smoke removal tube 604, and the top of the water tank 502 is higher than the smoke removal tube 604.

[0039] It should be noted that the heat conduction plate 2 is made of metal materials with strong heat absorption capacity, such as copper and aluminum, to ensure that the heat conduction plate 2 can conduct the temperature of the stove to the water supply component 4.

[0040] The problems encountered in actual use of the present invention are as follows: the surface temperature of the smoke removal tube 604 is relatively low under normal conditions, and the surface tension of the water mist sprayed on the inner wall of the smoke removal tube 604 is large, which makes it easy for a long, uneven water film to form on the inner wall of the smoke removal tube 604. At this time, the water film is difficult to fully cover the inner wall of the smoke removal tube 604. In order to ensure that the water film on the inner wall of the smoke removal tube 604 can be evenly distributed, it is necessary to reduce the surface tension of the water droplets in the water mist. The surface tension of the water droplets decreases as the temperature increases.

[0041] In order to ensure that a uniform water film is formed on the inner wall of the smoke removal tube 604 to protect the inner wall of the smoke removal tube 604, the present invention absorbs the heat near the stove through the heat conduction plate 2 and conducts the heat to the water supply component 4, so that the water inside the water supply component 4 has a certain temperature, and then the water inside the water supply component 4 is transported to the inside of the water storage tank 502 through the water inlet 501. When the water inside the water storage tank 502 reaches the top of the smoke removal tube 604, the water supply component 4 stops transporting the water into the water storage tank 502. At this time, the water inside the water storage tank 502 conducts the temperature to the smoke removal tube 604, so that the temperature of the smoke removal tube 604 increases. At this time, when the water mist is sprayed onto the inner wall of the smoke removal tube 604, the surface tension of the water droplets in the water mist is reduced, so that the water droplets in the water mist on the inner wall of the smoke removal tube 604 are easier to diffuse, so that the water mist sprayed on the inner wall of the smoke removal tube 604 can more easily form a uniform water film, thereby preventing oil smoke particles from directly adhering to the inner wall of the smoke removal tube 604.

[0042] See also Figure 8-Figure 9 The rotary spraying assembly 8 also includes a motor 802 , a driven gear 804 is installed on the water pipe 805 , a driving gear 803 is installed on the output shaft of the motor 802 , and the driving gear 803 is meshed with the driven gear 804 .

[0043] It should be noted that when the atomizing nozzle 810 is in use, if the atomizing port on the atomizing nozzle 810 is blocked, the atomizing area of ​​the atomizing nozzle 810 is reduced. Therefore, part of the inner wall of the smoke removal tube 604 cannot contact the water mist and cannot form a water film, which easily causes the oil fume particles to directly adhere to the inner wall of the smoke removal tube 604. Therefore, when the atomizing nozzle 810 sprays water mist, the driving gear 803 runs, so that the driving gear 803 drives the driving water pipe 805 and the atomizing nozzle 810 to rotate through the engagement of the driving gear 803 and the driven gear 804. Even if the atomizing port of the atomizing nozzle 810 is blocked, the water mist can be evenly sprayed on the inner wall of the smoke removal tube 604 and form a water film through the rotation of the atomizing nozzle 810 itself, thereby improving the fault tolerance of the equipment and avoiding the situation where the oil fume particles directly adhere to the inner wall of the smoke removal tube 604 due to the blockage of the atomizing port on the atomizing nozzle 810.

[0044] See also Figure 7 An air pump 603 is installed on the smoke pipe 602 . The smoke pipe 602 is tilted, and the air inlet of the smoke pipe 602 faces the second air inlet 104 .

[0045] It should be noted that the atomizing nozzle 810 sprays water mist into the smoke removal tube 604, and the water mist separates the oil smoke in the air and discharges it through the sewage outlet 601. In this process, in order to prevent the water mist from leaking through the smoke pipe 602, the smoke pipe 602 is set at an angle.

[0046] See also Figure 8-Figure 9A reciprocating screw sleeve 806 is installed on the moving water pipe 805, and a liquid pressure plate 809 is vertically slidably installed inside the water storage tank 502, and the height of the liquid pressure plate 809 is located above the top of the smoke removal cylinder 604. The liquid pressure plate 809 is connected to the transmission ring 807 through the guide rod 808, and the transmission ring 807 cooperates with the reciprocating screw sleeve 806 for transmission.

[0047] It should be noted that, when cooking on a stove, the moment the food is put into the oil pan, the high-temperature grease evaporates and decomposes rapidly when in contact with the food, forming a large amount of particulate matter and gaseous organic matter. The amount of oil smoke generated at this time is the largest. When the oil smoke enters the smoke removal tube 604, a large amount of particulate matter in the oil smoke will quickly adhere to the water film on the inner wall of the smoke removal tube 604. When the speed at which the particulate matter adheres to the water film is greater than the speed at which water droplets are formed on the water film, the particulate matter can easily pass through the water film and adhere to the inner wall of the smoke removal tube 604, resulting in the attachment of oil smoke particles that are difficult to clean on the inner wall of the smoke removal tube 604. Therefore, when the motor 802 drives the moving water pipe 805 and the atomizing nozzle 810 to rotate, the reciprocating screw sleeve 806 on the moving water pipe 805 rotates synchronously with the moving water pipe 805, and is connected to the transmission ring 807 through the reciprocating screw sleeve 806. The rotation of the reciprocating screw sleeve 806 drives the guide rod 808 and the liquid pressure plate 809 to reciprocate and rise and fall. When the guide rod 808 drives the liquid pressing plate 809 to descend, the liquid pressing plate 809 presses the water inside the water tank 502, causing the water to overflow from the top of the smoke removal tube 604, and the overflowing water washes along the inner wall of the smoke removal tube 604, directly washing away the oil smoke particles that are about to pass through the water film and adhere to the inner wall of the smoke removal tube 604, thereby ensuring the cleanliness of the inner wall of the smoke removal tube 604; when the guide rod 808 drives the liquid pressing plate 809 to move upward, the water level inside the water tank 502 decreases. At this time, the water supply component 4 transports the water inside the water tank 502 until the water level inside the water tank 502 returns to its original height. The operation of restoring the water level height can be achieved through the coordinated work of the liquid level sensor and the water pump, that is, the liquid level sensor detects the water level height inside the water tank 502. When the water level height is lower than the specified value, the liquid level sensor transmits a signal to the water pump. When the liquid level sensor detects that the water level height inside the water tank 502 has been restored, the water pump stops.

[0048] See also Figure 5 The sound insulation cotton 9 is installed inside the shell 101 and filled on both sides of the water tank 502 .

[0049] It should be noted that in order to reduce the noise generated during the operation of the rotating spray assembly 8 and improve the overall quietness of the equipment, the present invention reduces the noise generated during the operation of the rotating spray assembly 8 by filling sound insulation cotton 9 on both sides of the water tank 502.

[0050] See also Figure 2-Figure 6A ventilation plate 812 is installed on the fixed plate 11, and both sides of the ventilation plate 812 are through-set. The smoke removal tube 604 is connected with the fixed plate 11 through the through-holes on both sides of the ventilation plate 812. The motor 802 and the rotatable water pipe 805 are fixedly installed on the ventilation plate 812 respectively. An exhaust hole 105 is opened on the top of the shell 101, and the exhaust hole 105 is located on the top of the wireless mainboard 12. A baffle 811 is installed on the atomizing nozzle 810.

[0051] It should be noted that if natural gas leaks, the gas will be mixed with the oil smoke and sucked into the smoke removal tube 604 by the vacuum pump 603. Since natural gas is insoluble in water and is lighter than air, the leaked natural gas is insoluble in the water mist sprayed by the atomizing nozzle 810. After the water mist removes the oil smoke, the leaked natural gas can move to the top of the smoke removal tube 604 and enter the recognition area of ​​the gas sensor body 13 through the through holes on both sides of the ventilation plate 812. When the gas sensor body 13 recognizes the natural gas leakage, the wireless motherboard 12 drives the buzzer to run, and the alarm signal is transmitted to the user's mobile device through the wireless motherboard 12 to remind the user of the gas leakage.

[0052] The baffle 811 is used to block the water mist to prevent the water mist from floating upward into the identification area of ​​the gas sensor body 13 and causing interference to the gas sensor body 13 .

[0053] The implementation principle of the present invention is: the present invention is divided into two states when in use, The first state is that the first air inlet 103 is open, that is, nothing is being heated or stewed on the stove, the wireless mainboard 12 controls the first air supply pump 303 to pump air into the first cylinder 301, the first cylinder 301 pushes the first baffle 305 to move, so that the first baffle 305 is separated from the blockage of the first air inlet 103, and the first air inlet 103 is open. If there is a gas leak, the leaked gas can directly enter the box 1 through the first air inlet 103 and be detected by the gas sensor body 13; The second state is that the first air inlet 103 is closed and the second air inlet 104 is open. When the infrared temperature measurement module 7 detects that the temperature is rising, the wireless mainboard 12 controls the second air supply pump 304 to pump air to the second cylinder 302, and the second cylinder 302 pushes the second baffle 306 to move, so that the first baffle 305 is separated from the blockage of the second air inlet 104. At this time, the second air inlet 104 is opened. Similarly, the wireless mainboard 12 controls the first air inlet 103 to be closed. The liquid inlet pump 403 is started, and the liquid inlet pump 403 transports the water in the water supply tank 401 to the static water pipe 801, and then transports the water to the atomizing nozzle 810 through the dynamic water pipe 805, and sprays the water toward the inside of the smoke removal tube 604 through the atomizing nozzle 810. The atomized water forms a water film on the inner wall of the smoke removal tube 604. At this time, the air pump 603 is running, and the air pump 603 extracts the oil smoke into the smoke removal tube 604 through the second air inlet 104 and the smoke pipe 602. When the oil smoke enters the smoke removal tube 604, the gaseous organic matter in the oil smoke dissolves in the water mist and passes through the sewage outlet 601. The particles in the oil fume are washed downward by the water mist sprayed downward, and the particles in the oil fume are washed away by the water mist. The particles not washed away by the water mist will adhere to the water film on the inner wall of the smoke removal tube 604. As the water mist is continuously sprayed downward, the water mist gathers on the water film on the inner wall of the smoke removal tube 604 and drives the oil fume particles on the water film to rush downward, so that the oil fume particles on the water film are discharged through the sewage outlet 601, thereby avoiding the attachment of oil fume particles to the inner wall of the smoke removal tube 604, and there is no need to clean and maintain the inner wall of the smoke removal tube 604, which saves time and effort and improves the utilization efficiency of the equipment. If the smoke inhaled from the smoke extractor 604 contains leaked natural gas, since natural gas is insoluble in water and is lighter than air, the leaked natural gas can float to the top of the smoke extractor 604. At this time, the gas sensor body 13 located on both sides of the top of the smoke extractor 604 can directly detect the leakage of natural gas, and the wireless motherboard 12 drives the buzzer to run, and the alarm signal is transmitted to the user's mobile device through the wireless motherboard 12 to remind the user of the gas leakage.

[0054] The following problems may occur when spraying water mist: First, if the atomizing port on the atomizing nozzle 810 is blocked, the atomizing area of ​​the atomizing nozzle 810 is reduced. Therefore, part of the inner wall of the smoke removal tube 604 cannot contact the water mist and cannot form a water film, which easily causes the oil fume particles to directly adhere to the inner wall of the smoke removal tube 604. Therefore, when the atomizing nozzle 810 sprays water mist, the driving gear 803 runs, so that the driving gear 803 drives the driving water pipe 805 and the atomizing nozzle 810 to rotate through the engagement of the driving gear 803 and the driven gear 804. Even if the atomizing port of the atomizing nozzle 810 is blocked, the water mist can be evenly sprayed on the inner wall of the smoke removal tube 604 and form a water film through the rotation of the atomizing nozzle 810 itself, thereby improving the fault tolerance of the equipment and avoiding the situation where the oil fume particles directly adhere to the inner wall of the smoke removal tube 604 due to the blockage of the atomizing port on the atomizing nozzle 810.

[0055] Second, the surface temperature of the smoke removal tube 604 is relatively low under normal conditions, and the surface tension of the water mist sprayed on the inner wall of the smoke removal tube 604 is large, which makes it easy for a long and uneven water film to form on the inner wall of the smoke removal tube 604. At this time, the water film is difficult to fully cover the inner wall of the smoke removal tube 604. In order to ensure that the water film on the inner wall of the smoke removal tube 604 can be evenly distributed, it is necessary to reduce the surface tension of the water droplets in the water mist. The surface tension of the water droplets decreases with increasing temperature. In order to ensure that a uniform water film is formed on the inner wall of the smoke removal tube 604 to protect the inner wall of the smoke removal tube 604, the present invention absorbs the heat near the stove through the heat conduction plate 2 and conducts the heat to the water supply component 4, so that the water inside the water supply component 4 It has a certain temperature, and then the water inside the water supply component 4 is transported to the water tank 502 through the water inlet 501. When the water inside the water tank 502 reaches the top of the smoke removal tube 604, the water supply component 4 stops transporting to the water tank 502. At this time, the water inside the water tank 502 transfers the temperature to the smoke removal tube 604, so that the temperature of the smoke removal tube 604 increases. At this time, when the water mist is sprayed onto the inner wall of the smoke removal tube 604, the surface tension of the water droplets in the water mist is reduced, making it easier for the water droplets in the water mist on the inner wall of the smoke removal tube 604 to diffuse, so that the water mist sprayed on the inner wall of the smoke removal tube 604 can more easily form a uniform water film, thereby preventing oil smoke particles from directly adhering to the inner wall of the smoke removal tube 604.

[0056] Third, when cooking on a stove, the moment the food is put into the oil pan, the high-temperature grease evaporates and decomposes rapidly when in contact with the food, forming a large amount of particulate matter and gaseous organic matter. The amount of oil smoke generated at this time is the largest. When the oil smoke enters the smoke removal tube 604, a large amount of particulate matter in the oil smoke will quickly adhere to the water film on the inner wall of the smoke removal tube 604. When the speed at which the particulate matter adheres to the water film is greater than the speed at which water droplets are formed on the water film, the particulate matter can easily pass through the water film and adhere to the inner wall of the smoke removal tube 604, resulting in the attachment of oil smoke particles to the inner wall of the smoke removal tube 604. Therefore, when the motor 802 drives the moving water pipe 805 and the atomizing nozzle 810 to rotate, the reciprocating screw sleeve 806 on the moving water pipe 805 rotates synchronously with the moving water pipe 805, and is connected to the transmission ring 807 through the reciprocating screw sleeve 806. The rotation of the reciprocating screw sleeve 806 drives the guide rod 808 and the liquid pressure plate 809 to reciprocate and rise and fall. When the guide rod 808 drives the liquid pressure plate 809 to descend, the liquid pressure plate 809 presses the water inside the water tank 502, causing the water to overflow from the top of the smoke removal tube 604, and the overflowing water washes along the inner wall of the smoke removal tube 604, directly washing away the oil smoke particles that are about to pass through the water film and adhere to the inner wall of the smoke removal tube 604, thereby ensuring the cleanliness of the inner wall of the smoke removal tube 604; when the guide rod 808 drives the liquid pressure plate 809 to move upward, the water level inside the water tank 502 decreases. At this time, the water supply component 4 transports the water inside it into the water tank 502 until the water level inside the water tank 502 returns to its original height.

[0057] The above shows and describes 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 to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A gas alarm based on a low-power wireless passive sensor network, characterized in that: The invention comprises a box body (1), wherein the box body (1) comprises a cover plate (102) and an outer shell (101), a water supply component (4) and a smoke inlet component (6) are installed inside the outer shell (101), a first air inlet (103) and a second air inlet (104) are provided on the cover plate (102), and an air inlet switching component (3) for opening and closing the first air inlet (103) and the second air inlet (104) is installed on the cover plate (102); The smoke inlet assembly (6) comprises a smoke removal cylinder (604), a smoke pipe (602) is installed on the smoke removal cylinder (604), a sewage outlet (601) is installed at the bottom of the smoke removal cylinder (604), the water supply assembly (4) is connected to the rotary spray assembly (8), the rotary spray assembly (8) comprises a static water pipe (801) and a rotatable dynamic water pipe (805), the static water pipe (801) and the dynamic water pipe (805) are rotatably connected, an atomizing nozzle (810) is installed on the dynamic water pipe (805), and the atomizing nozzle (810) is located at the top of the smoke removal cylinder (604), and a water storage assembly (5) is installed on the outside of the smoke inlet assembly (6), and the water storage assembly (5) is connected to the water supply assembly (4); A fixing plate (11) is installed inside the housing (101), a wireless mainboard (12) is installed on the fixing plate (11), and an infrared temperature measurement module (7) and a gas sensor body (13) are respectively installed on the wireless mainboard (12).

2. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: The air inlet switching assembly (3) comprises a first cylinder (301) and a second cylinder (302); the output ends of the first cylinder (301) and the second cylinder (302) are respectively connected to a first baffle (305) and a second baffle (306); the first baffle (305) and the second baffle (306) respectively block the first air inlet (103) and the second air inlet (104); the first cylinder (301) and the second cylinder (302) are respectively connected to a first air supply pump (303) and a second air supply pump (304).

3. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: The water supply assembly (4) comprises a water supply box (401) and a liquid inlet pipe (404) mounted thereon, the liquid inlet pipe (404) being connected to a still water pipe (801) via a liquid inlet pump (403), a water inlet pipe (402) being mounted on the water supply box (401), the water inlet pipe (402) being connected to a water pipe, a thermal conductive plate (2) being mounted on the housing (101), one side of the thermal conductive plate (2) being in contact with the water supply box (401).

4. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: The rotary spraying assembly (8) further comprises an electric motor (802), a driven gear (804) is mounted on the moving water pipe (805), a driving gear (803) is mounted on the output shaft of the electric motor (802), and the driving gear (803) is meshed with the driven gear (804).

5. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: An air extraction pump (603) is installed on the smoke pipe (602), the smoke pipe (602) is arranged to be inclined, and the air inlet of the smoke pipe (602) faces the second air inlet (104).

6. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: A water storage component (5) is installed outside the smoke inlet component (6), the water storage component (5) comprising a water inlet (501) and a water storage tank (502), the water inlet (501) is connected to the water supply tank (401), the water storage tank (502) is sealed and installed outside the smoke removal cylinder (604), and the top of the water storage tank (502) is higher than the smoke removal cylinder (604).

7. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: A reciprocating screw sleeve (806) is installed on the moving water pipe (805), and a liquid pressure plate (809) is vertically slidably installed inside the water storage tank (502), and the height of the liquid pressure plate (809) is located above the top of the smoke removal tube (604). The liquid pressure plate (809) is connected to the transmission ring (807) through a guide rod (808), and the transmission ring (807) and the reciprocating screw sleeve (806) are matched in transmission.

8. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: Sound insulation cotton (9) is installed inside the housing (101), and the sound insulation cotton (9) is filled on both sides of the water storage tank (502).

9. A gas alarm based on a low-power wireless passive sensor network according to claim 1, characterized in that: A ventilation plate (812) is installed on the fixed plate (11), and both sides of the ventilation plate (812) are through-set. The smoke removal tube (604) is connected to the fixed plate (11) through the through-holes on both sides of the ventilation plate (812). The motor (802) and the moving water pipe (805) are fixedly installed on the ventilation plate (812), respectively. An exhaust hole (105) is opened on the top of the housing (101), and the exhaust hole (105) is located on the top of the wireless mainboard (12). A baffle (811) is installed on the atomizing nozzle (810).

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