A sorting garbage kiosk monitoring device

Abstract

The application relates to the technical field of monitoring detection, in particular to a classified garbage pavilion monitoring device, which comprises a filtering device shell, one end of the filtering device shell is provided with an air extractor, the other end of the filtering device shell is connected with a pipeline, an activated carbon adsorption layer is arranged in the filtering device shell and close to one end of the air extractor, a gelatinized cotton filter screen is arranged in the filtering device shell and away from the air extractor, and a HEPA filter screen is arranged in the middle of the filtering device shell. The global detection unit and the air pressure detection unit are used for monitoring the consumption degree of the three layers of filter screens respectively, compared with artificial periodical inspection, the application can timely find whether any filter screen in the filtering device is completely consumed, can timely remind workers to replace the filter screen, and prevents dust, peculiar smell and other substances in the classified garbage pavilion from spreading due to the failure of the filter screen, so that environmental pollution is caused.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of monitoring detection, in particular to a classified garbage kiosk monitoring device. BACKGROUND

[0002] With the promotion of China's policy, there are more and more garbage classification pilot cities. In order to realize more efficient recycling of garbage, each pilot city sets up a classified garbage kiosk for collecting classified garbage. The existing classified garbage kiosk has a supporting negative pressure equipment and a filtering device. When the residents select the garbage type on the operation panel of the classified garbage kiosk, the control system will first start the negative pressure equipment. The negative pressure equipment will draw the gas inside the garbage can through the pipeline, so that the internal pressure of the garbage can is less than the atmospheric pressure. Therefore, when the garbage can opening is opened, the external gas enters from the garbage can inlet, and the gas and dust inside the garbage can cannot go out from the garbage can inlet. The gas will carry the odor and dust out after passing through the filtering device, so that the residents will not be affected by the odor and bacteria when they dump garbage, and a good experience is provided for the residents.

[0003] The existing classified garbage kiosk filtering device is generally composed of a gelatinized cotton coarse filter screen, a HEPA filter screen and an activated carbon adsorption layer. The gelatinized cotton coarse filter screen and the HEPA filter screen can filter out 99% of the dust and particles in the gas, and the activated carbon adsorption layer can completely absorb the remaining odor and chemical gas in the gas. The filtering effect of the three filter screens is inversely proportional to the use time, so they need to be replaced regularly. However, since the garbage produced by residents every day is not fixed, the consumption of the three-layer filter screen is also different. When the gelatinized cotton coarse filter screen and the HEPA filter screen absorb too much dust and particles, the air outlet will be blocked, affecting the work of the negative pressure equipment. When the residents use the garbage can, the odor and dust will escape from the garbage can inlet, endangering the health of the residents. When the activated carbon filter screen layer is consumed too much, it cannot completely absorb the odor and chemical gas extracted by the negative pressure equipment, which also endangers the residents. The existing classified garbage kiosk generally has a supervisor to manage the classified garbage kiosk. If the filtering device cannot remove the odor and dust, the supervisor can discover and report the maintenance in time. However, some local areas in China have started to implement unmanned classified garbage kiosks, which rely entirely on sensors and monitoring equipment to assist the operation of the classified garbage kiosk. However, the existing unmanned classified garbage kiosk lacks monitoring of the filtering device, and adopts the method of regular inspection and replacement. Therefore, in the unmanned classified garbage kiosk, if the filtering device fails, it cannot be fed back in time. When the filtering device fails and the time for replacing the filter screen is too long, the residents will have a repulsive psychology towards the classified garbage kiosk due to the continuous odor, which will affect the promotion of the garbage classification policy.

[0004] To this end, a kind of classified garbage kiosk monitoring device is proposed, the use condition of filter screen in unattended classified garbage kiosk filter device is monitored in real time, when filter screen is consumed to set degree, timely signal reminds staff to replace filter screen in time, improve the monitoring strength of classified garbage kiosk filter device, prevent filter screen from being completely consumed and lead to that filter device cannot purify the air in garbage kiosk, cause environmental pollution. SUMMARY

[0005] The present application aims to provide a kind of classified garbage kiosk monitoring device, by global detection unit and air pressure detection unit cooperate, the consumption degree of three filter screens is monitored respectively, when a certain filter screen is completely consumed, control system will timely remind staff to replace from terminal, to solve the problems proposed in the above background art.

[0006] To achieve the above object, the present application provides the following technical scheme:

[0007] A kind of classified garbage kiosk monitoring device, comprising:

[0008] Filter device shell, one end of the filter device shell is fixedly installed with suction fan by bolt connection, the other end of the filter device shell is connected with pipeline, the end of the filter device shell close to suction fan is installed with activated carbon adsorption layer by clamping plate, the end of the filter device shell away from suction fan is installed with gelatinized cotton filter screen by clamping plate, the filter device shell is installed with HEPA filter screen by clamping plate, and HEPA filter screen is located between activated carbon adsorption layer and gelatinized cotton filter, the filter device shell is U-shaped plate, and the opening of U-shaped plate is horizontal, the filter device shell opening is rotatably installed with switch door by hinge shaft and buckle, and switch door and filter device shell can be sealed by sealing ring when closing.

[0009] Further comprising:

[0010] Global detection unit, global detection unit is installed in the filter device shell, global detection unit monitors whether the whole filter device of classified garbage kiosk is invalid by wind speed and smell detection, a plurality of air pressure detection units are installed on the inner side wall of the filter device shell, the air pressure detection units are located between every two of three filter screens, the air pressure detection units are used to detect whether the air pressure between every two of three filter screens is abnormal, the air pressure detection units are used to determine specific invalid filter screen by cooperating with global detection unit.

[0011] The existing classification garbage pavilion, in order to give the residents a good use effect, when the residents pour garbage, the dust, impurities, bacteria and peculiar smell in the garbage can will not escape from the garbage inlet of the garbage can, but under the action of the air extractor, the gas outside will flow into the garbage can, and the gas in the garbage can will be extracted through the pipeline connected with the garbage can into the filtering device. The extracted gas is purified into harmless air to the human body and the environment after passing through the filtering device. The filtering device is composed of three layers of filtering screens of gelatinized cotton, HEPA and activated carbon adsorption layer. The extracted gas first passes through the gelatinized cotton filter screen, which can filter out the larger substances such as hair, dust, spores and dust mites in the gas. Then the gas passes through the HEPA filter screen, which can filter out the bacteria and smoke in the gas, which can be inhaled into the human body. At this time, only odor molecules and chemical gases are left in the gas, and the activated carbon adsorption layer can well absorb these substances. Good use experience can quickly increase the acceptance of residents to the classification garbage pavilion and speed up the implementation of the garbage classification policy.

[0012] Since the gelatinized cotton filter screen, HEPA filter screen and activated carbon adsorption layer are consumables, the existing solution is to replace them regularly. However, since the garbage produced by residents every day is not fixed, the consumption degree and rate of the three layers of filter screens are also different. When the gelatinized cotton coarse filter screen and the HEPA filter screen absorb too much dust particles, the air outlet will be blocked, affecting the work of the negative pressure equipment. When the activated carbon filter screen layer is consumed too much, it cannot completely absorb the peculiar smell and chemical gas of the negative pressure equipment. These two cases will harm the residents. In the unattended classification garbage pavilion, this situation cannot be fed back in time, so a global detection unit is needed to monitor the consumption degree of the three kinds of filter screens respectively.

[0013] Preferably, the global detection unit comprises a bracket I installed on the activated carbon adsorption layer and the HEPA filter screen, the bracket I is X-shaped, and the bracket I is fixedly connected with the top wall and the bottom wall inside the filter device shell, the cross section shape of the bracket I is oval, a rotating shaft is rotatably installed on the bracket I, a fan blade is fixedly installed on the rotating shaft, a proximity switch for monitoring the rotating speed of the fan blade is installed on the inner wall of the filter device shell, and the proximity switch and the fan blade are located in the same plane, and a smell detector is installed in the air extractor, and the smell detector is located on the gas outlet side of the air extractor impeller.

[0014] Due to the gelatinized cotton filter screen and the HEPA filter screen, after being used for a period of time, the resistance of the filter screen to the gas will increase and the permeability of the filter screen will decrease due to too many impurities and foreign matters attached to the filter screen. Therefore, the gelatinized cotton filter screen, the HEPA filter screen and the activated carbon adsorption layer need to be separately installed in the filter device housing in sequence, and a support one is installed between the HEPA filter screen and the activated carbon filter. Since the side wall of the filter device housing is a switch door used for replacing the filter screen, in order not to interfere with the switch door, the support one is arranged in an X shape and is only fixedly connected with the top wall and the bottom wall inside the filter device housing. The cross section of the support one is an oval shape with a thickness of less than 4 mm, and the long diameter direction of the oval shape is parallel to the gas flow direction. In this way, the support one can be arranged to as small as possible to reduce the resistance to the gas and reduce the influence on the efficiency of the air extractor. A rotating shaft is installed at the center of the support one, and a fan blade is installed on the rotating shaft. The fan blade and the rotating shaft are driven by the gas extracted by the air extractor, and the gas will drive the fan blade and the rotating shaft to rotate when passing through the fan blade. A proximity switch is installed on the side wall of the filter device housing, and the proximity switch is located in the same plane as the fan blade. The proximity switch is connected with the control system, and when the fan blade rotates and passes through the proximity switch, the proximity switch will be triggered, and the control system will count. The control system can calculate the rotating speed of the fan blade and the consumption degree of the filter screen by the number of times of triggering of the proximity switch per unit time. After a unit time, when the number of times of triggering of the proximity switch is greater than 150-200 r / min, the control system will reset the count and start counting again. When the number of times of triggering of the proximity switch is less than 150-200 r / min, the control system detects whether the space between the activated carbon adsorption layer and the HEPA filter screen and the space between the HEPA filter screen and the gelatinized cotton filter screen are in a negative pressure state through a gas pressure detection unit. The control system can determine whether the HEPA filter screen or the gelatinized cotton filter screen is invalid by combining the above information, and sends information to the terminal to remind the staff to replace the filter screen. The control system will reset the count and stop counting.

[0015] Since the particulate matters in the gas have been filtered out after passing through the first two layers of filter screens and reaching the activated carbon adsorption layer, the substances filtered by the activated carbon rise to the molecular level, so the permeability of the activated carbon adsorption layer is not related to the consumption degree. Therefore, a smell detector is installed between the activated carbon adsorption layer and the air extractor to detect. The smell detector generally sucks a small amount of gas into the detector for analysis and obtains the result after 60 s. The smell detector is connected with the control system, and when the smell detector detects that a certain substance in the gas exceeds 5-10 mg / m 3When the time comes, the control system sends information to the terminal to remind the staff to replace the filter screen. The concentration of molecules in the gas after passing through the activated carbon adsorption layer may not be uniform, so odor detection of the gas at this time may deviate greatly from the last exhaust gas. Therefore, the odor detector needs to be installed on the side of the air impeller along the direction of gas advancement. After being stirred by the air impeller, the various molecules in the gas will form a uniform state. At this time, odor detection of the gas can obtain accurate odor concentration.

[0016] Preferably, the air pressure detection unit comprises a plurality of through holes one opened on the filter device shell, a plurality of air cylinders are installed on the outer side wall of the filter device shell, one end of the air cylinder is in communication with the through hole one, the other end of the air cylinder is provided with a through hole two, a piston is movably installed in the air cylinder, a top rod matched with the through hole two is vertically installed on the side of the piston away from the through hole one, the top rod is a square rod, the through hole two is a square hole, a plurality of supports two are installed on the top wall of the outer side of the filter device shell, and the supports two are located on one side of the air cylinder, a contact switch is installed on the top of the support two, a negative pressure pipe is horizontally installed on the side wall of the air cylinder, one end of the negative pressure pipe is in communication with the inner cavity of the air cylinder, and the other end of the negative pressure pipe is a one-way valve.

[0017] Before the filter device is put into use, the air in the air cylinder is first pumped away through the one-way valve at one end of the negative pressure pipe by the air pump, so that a negative pressure of 0.7x10 5 -0.75x10 5 Pa is formed in the inner wall of the air cylinder. Under the action of the negative pressure, the piston will move towards the contact switch, and finally stop moving under the action of the limiting protrusion in the air cylinder. At this time, the top rod will contact the contact switch, and the contact switch is in the triggered state. No matter where the piston is located, the free end of the top rod is always located outside the air cylinder.

[0018] When the residents are ready to put garbage, the air suction machine will start in advance, so that the air pressure in the garbage can is less than the outside air pressure. When the garbage can is opened, the outside air will enter the garbage can. After the garbage can is opened for 2s, the proximity switch starts to start. When the gel cotton filter screen is seriously blocked, the fan speed will be less than the set value, and due to the entry of the outside air, the air pressure on the side of the gel cotton away from the air suction machine will gradually recover to the atmospheric pressure state, and the space on the side of the gel cotton filter screen close to the air suction machine will form a larger negative pressure state under the action of the air suction machine. When the air pressure value of the space on the side of the gel cotton filter screen close to the air suction machine is less than 0.7x10 5 -0.75x10 5When the piston moves downward with the ejector rod, neither of the two contact switches is triggered, at which time the control system sends a terminal information that the gelatinized cotton filter screen is consumed excessively and needs to be replaced, prompting the staff to replace the filter screen. When the HEPA filter screen is seriously clogged, the contact switch between the HEPA filter screen and the activated carbon adsorption layer is triggered, while the contact switch between the gelatinized cotton filter screen and the HEPA filter screen is not triggered, at which time the control system sends a terminal information that the HEPA filter screen is consumed excessively and needs to be replaced, prompting the staff to replace the filter screen.

[0019] In order to avoid the rotation of the piston when moving, aggravate the wear of the piston and the sealing ring, and reduce the service life of the air pressure detection unit, the ejector rod and the through hole matched with the ejector rod are designed into a square shape to solve the problem of the rotation of the piston.

[0020] Preferably, the second through hole is located on the top wall of the filter device shell, and the air cylinder is located on the outer top wall of the filter device shell.

[0021] After the gas passes through the gelatinized cotton filter screen, there are still particulate matters with a volume diameter less than 2.5 pm, in order to prevent the particulate matters from entering the gap between the piston and the air cylinder, increase the friction when the piston moves, and cause the distortion of the air pressure detection, the air cylinder and the second through hole are arranged on the top of the filter device shell, because the particulate matters in the gas generally adhere to the HEPA filter screen or a small part falls to the inner bottom wall of the filter device shell under the action of gravity, therefore, arranging the air cylinder and the second through hole on the top of the filter device shell can effectively prevent dust falling.

[0022] Preferably, the HEPA filter screen is installed with a conical pipe near the side of the air extractor, one end of the conical pipe is square, the other end of the conical pipe is circular, the diameter of the circular end of the conical pipe is equal to the overall diameter of the fan blade, and a straight pipe is horizontally installed at the circular end of each conical pipe, the length of the straight pipe is 2-3 times the length of the conical pipe.

[0023] Since the consumption degree of each part of the filter screen is not the same when in use, the permeability of each position of the filter screen is also not the same, and the general filter screen is square, and the overall shape of the fan blade is close to a circle, if only the fan blade is installed behind the filter screen, the gas after passing through the filter screen cannot be uniformly applied to the fan blade, and the gas at the four corners of the filter screen cannot be applied to the fan blade, which leads to that the fan blade cannot well detect the overall consumption degree of the filter screen, and therefore the conical pipe is installed on the side of the filter screen close to the air extractor. The joint surface of the conical pipe and the filter screen is square, and the air outlet is circular, so the conical pipe can gather all the gas passing through the filter screen, and the diameter of the air outlet of the conical pipe is equal to the overall diameter of the fan blade, so the gas passing through the filter screen can be applied to the fan blade, and the fan blade is driven to rotate. According to Bernoulli's principle, since the cross-sectional area of the pipeline gradually decreases, the conical pipe can increase the flow rate of the gas by 0.2-0.3 times, can move the measurement value interval as a whole to the left, facilitates the fan blade and the proximity switch to better measure, and ensures the accuracy of the global detection unit.

[0024] The gas out of the conical pipe will form a certain inclination along the inclined direction of the conical pipe, which will affect the force rotation of the fan blade, so that the fan blade cannot accurately detect the flow rate of the gas, and therefore a straight pipe is horizontally installed at the air outlet of the conical pipe, and the straight pipe can restore the flow direction of the gas to a horizontal shape.

[0025] Preferably, the material of the fan blade is polyethylene, and the fan blade is covered with an anti-static coating.

[0026] The greater the mass of the fan blade, the greater the torque required for rotation, in order to make the rotation speed of the filter screen at each consumption degree embodied on the fan blade more smooth, the fan blade is made of polyethylene in the present application, the density of the polyethylene material is 0.89-0.91 g / m 3 , and the mass of the fan blade made of the polyethylene material is very light, so that the fan blade cannot rotate due to the small air speed caused by the large consumption degree of the filter screen before the filter screen needs to be replaced, so as to detect the condition of the filter screen.

[0027] Generally, a layer of dust will be accumulated on the fan blade of an electric fan after the electric fan is used for a period of time, because static electricity is generated by friction between the fan blade and the air during rotation of the fan blade, and fine particles in the air are adsorbed on the surface of the fan blade, the accumulation of the fine particles will increase the weight of the fan blade, increase the torque required for rotation of the fan blade, and affect the accuracy of the global detection unit. And the gas passing through the gelatinized cotton filter screen still contains fine particles, so spraying an anti-static coating on the fan blade can prevent static electricity from being generated by friction between the fan blade and the air during rotation of the fan blade, and the fine particles will not be accumulated on the fan blade.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] 1、The global detection unit and the air pressure detection unit cooperate, the consumption degree of three kinds of filter screen is monitored in real time respectively, if the gelatinized cotton filter screen, HEPA filter screen or active carbon adsorption layer is consumed completely, the global detection unit and the air pressure detection unit send signals to the control system, the control system sends information to the terminal in time to remind the staff that the filter screen of which classification garbage booth is consumed completely, so that the staff can efficiently and accurately replace the filter screen, prevent the unattended classification garbage booth from being unable to find that the filter screen is consumed completely in time due to no supervisor, lead to the filter device being unable to purify the air in the garbage booth, cause environmental pollution.

[0030] 2, the gas through the filter screen is gathered by the tapered pipe and the speed is amplified, so that all the gas acts on the fan blade, and the amplified wind speed can move the measurement value interval as a whole to the left, prevent the rotating torque from being less than the static friction force, lead to the fan blade being unable to rotate, lead to inaccurate monitoring. Straight pipe can restore the flow direction of the gas acted by tapered pipe to horizontal, so that the fan blade is better stressed and rotated, the rotation speed measured by proximity switch is more accurate, ensure the accuracy of the global detection unit.

[0031] 3, the air pressure detection unit is installed on the bottom wall of the filter device shell, because the particulate matters in the gas generally adhere to the HEPA filter screen with the gas or a small part falls to the inside bottom wall of the filter device shell under the action of gravity, therefore, the air pressure detection unit is arranged on the inside top wall of the filter device shell, can effectively prevent dust from falling into the through hole one, affect the up-down movement of the piston, affect the measurement accuracy of the global detection unit, ensure the accuracy of the global detection unit. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the overall structure schematic diagram of the present application;

[0033] Figure 2 It is another side schematic diagram of the overall structure of the present application;

[0034] Figure 3 It is the side view of the present application;

[0035] Figure 4 It is the internal structure schematic diagram of the present application;

[0036] Figure 5 It is Figure 4 The local enlarged view of A in the middle;

[0037] Figure 6 It is the tapered pipe structure schematic diagram of the present application;

[0038] Figure 7 It is the half sectional view of the tapered pipe of the present application.

[0039] In the figure: 1. Filter housing; 2. Exhaust fan; 3. Activated carbon adsorption layer; 4. Colloidal cotton filter; 5. HEPA filter; 6. Door switch; 7. Bracket 1; 8. Rotating shaft; 9. Fan blades; 10. Proximity switch; 11. Odor detector; 12. Conical tube; 13. Straight tube; 14. Cylinder; 15. Piston; 16. Push rod; 17. Bracket 2; 18. Contact switch; 19. Negative pressure tube; 20. One-way valve. DETAILED DESCRIPTION

[0040] See also Figures 1 to 7 The present invention provides a monitoring device for a classified garbage booth, and the technical solution is as follows:

[0041] Example 1, reference Figures 1 to 7 , when the HEPA filter 5 is completely consumed but the activated carbon adsorption layer 3 and the gelled cotton filter 4 are not completely consumed.

[0042] When the garbage classification booth detects that a resident is using the garbage classification booth, the control system will first start the exhaust fan 2, which will extract the gas inside the garbage bin through the pipe, so that the gas inside the garbage bin will form a 0.8×10 5The negative pressure of the PA, when the residents select the type of garbage to be thrown on the control panel, the control system will control the corresponding garbage can to automatically open to let the residents throw the garbage, at this time, because the internal pressure of the garbage can is less than the atmospheric pressure, the external gas will flow into the garbage can, and the gas in the garbage can cannot escape from the garbage throwing entrance. The gas sucked by the air extractor 2 will enter the filtering device along the pipeline, and the gas can pass through the gelatinized cotton filter screen 4 well because the gelatinized cotton filter screen 4 has not adsorbed too much impurity dust. The gas passing through the gelatinized cotton filter screen 4 will then be filtered through the HEPA filter screen 5. After the gas passing through the HEPA filter screen 5, it will be gathered and enlarged under the action of the conical tube 12, and then act on the fan blade 9 after the guide of the straight tube 13, driving the fan blade 9 to rotate. The m12 proximity switch 10 will start after the garbage can is opened for 2 seconds, and the fan blade 9 will trigger the m12 proximity switch 10 when it rotates through the m12 proximity switch 10. The control system will count the total number of triggers of the m12 proximity switch 10. The m12 proximity switch 10 will stop starting after the garbage can is closed. At this time, the control system will calculate the rotating speed of the fan blade 9 through the total number of triggers of the m12 proximity switch 10 in unit time. However, the permeability of the HEPA filter screen 5 is poor due to the adsorption of too many particulate matters and bacteria, so the gas cannot pass through the HEPA filter screen 5 quickly, and the flow rate of the gas is slow, resulting in that the rotating speed of the fan blade 9 between the HEPA filter screen 5 and the activated carbon adsorption layer 3 is less than 150 r / min. Moreover, due to the blocking effect of the HEPA filter screen 5, the space pressure on the side of the HEPA filter screen 5 away from the air extractor 2 gradually recovers to equal to the atmospheric pressure under the supplement of the external gas, while the space on the side of the HEPA filter screen 5 close to the air extractor 2 gradually decreases in pressure value under the action of the air extractor 2. When the pressure value is less than 0.7 x 10 5 pa, the piston 15 moves downward with the top rod 16, and the contact switch 18 between the HEPA filter screen 5 and the activated carbon adsorption layer 3 is triggered, while the contact switch 18 between the gelatinized cotton filter screen 4 and the HEPA filter screen 5 is not triggered. The gas passing through the HEPA filter screen 5 will then be filtered through the activated carbon adsorption layer 3. Since the activated carbon adsorption layer 3 is not completely consumed, the activated carbon adsorption layer 3 can absorb the odor and chemical gas in the gas, so the odor detection instrument 11 measures that the concentration of various gases in the gas is less than 5 mg / m 3 .

[0043] When the rotation speed of the fan 9 between the HEPA filter screen 5 and the activated carbon adsorption layer 3 is less than 150 r / min, and the contact switch 18 between the HEPA filter screen 5 and the activated carbon adsorption layer 3 is triggered, but the contact switch 18 between the gelatinized cotton filter screen 4 and the HEPA filter screen 5 is not triggered, the control system sends a message to the terminal to remind the staff to replace the HEPA filter screen 5. After the staff replaces the HEPA filter screen 5, the staff needs to manually restore the air pressure in the air cylinder 14 to 0.7 x 10 5 pa.

[0044] In the second embodiment, with reference to Figures 1 to 7 When the activated carbon adsorption layer 3 is completely consumed, but the HEPA filter screen 5 and the gelatinized cotton filter screen 4 are not completely consumed.

[0045] After the gas passes through the gelatinized cotton filter screen 4, the gas continues to pass through the HEPA filter screen 5, and the gas passing through the HEPA filter screen 5 acts on the fan 9 between the HEPA filter screen 5 and the activated carbon adsorption layer 3, driving the fan 9 to rotate. After 2 s, the m12 proximity switch 10 is started, and the control system starts counting the rotation of the fan 9. When the garbage can is closed, the m12 proximity switch 10 stops starting, and the control system determines whether the total number of counts is less than 150 r / min. Since the HEPA filter screen 5 and the gelatinized cotton filter screen 4 are not completely consumed, the permeability of the two filter screens is still strong, and the gas is not greatly hindered. At this time, the counts of the two m12 proximity switches 10 are greater than 150 r / min, and the contact switch 18 between the HEPA filter screen 5 and the activated carbon adsorption layer 3 and the contact switch 18 between the gelatinized cotton filter screen 4 and the HEPA filter screen 5 are not triggered. However, since the activated carbon adsorption layer 3 is completely consumed, it cannot absorb odors and chemical gases. At this time, if the odor detector 11 measures that the concentration of a certain item in the gas is greater than 5 mg / m 3 , the control system sends a message to the terminal to remind the staff to replace the activated carbon adsorption layer 3.

[0046] Although the embodiments of the present application have been illustrated and described, it should be understood that various changes, modifications, substitutions and variations can be made to the states and components of the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A monitoring device for a garbage sorting kiosk, comprising: A filter housing, an exhaust fan is installed at one end of the filter housing, the other end of the filter housing is connected to a pipeline, an activated carbon adsorption layer is installed in the filter housing at one end close to the exhaust fan, a colloidal cotton filter is installed in the filter housing at one end away from the exhaust fan, a HEPA filter is installed in the filter housing, and the HEPA filter is located between the activated carbon adsorption layer and the colloidal cotton filter, the filter housing is a U-shaped plate, and the opening of the U-shaped plate is facing horizontally, and a switch door is rotatably installed at the opening of the filter housing; It is characterized by further comprising: A global detection unit is installed in the filter housing. The global detection unit monitors whether the filter device of the garbage classification kiosk has failed as a whole through wind speed and odor detection. A plurality of air pressure detection units are installed on the inner wall of the filter housing. The air pressure detection units are located between two of the three filter screens. The air pressure detection units are used to detect whether the air pressure between two of the three filter screens is abnormal. The air pressure detection units cooperate with the global detection unit to determine the specific failed filter screen. The global detection unit includes a bracket installed between the activated carbon adsorption layer and the HEPA filter. The bracket is X-shaped and fixedly connected to the top and bottom walls of the inner side of the filter housing. A rotating shaft is rotatably installed on the bracket, and a fan blade is fixedly installed on the rotating shaft. A proximity switch for monitoring the fan blade speed is installed on the inner side wall of the filter housing, and the proximity switch and the fan blade are located in the same plane. An odor detector is installed in the exhaust fan. The air pressure detection unit includes a plurality of through holes 1 opened on the filter device housing, a plurality of cylinders are installed on the outer wall of the filter device housing, and one end of the cylinder is connected to the through hole 1, and the other end of the cylinder is provided with a through hole 2, a piston is movably installed in the cylinder, and a push rod that cooperates with the through hole 2 is vertically installed on the side of the piston away from the through hole 1, a plurality of brackets 2 are installed on the outer top wall of the filter device housing, and the bracket 2 is located on one side of the cylinder, a contact switch is installed on the top of the bracket 2, a negative pressure tube is horizontally installed on the side wall of the cylinder, one end of the negative pressure tube is connected to the inner cavity of the cylinder, and the other end of the negative pressure tube is a one-way valve.

2. A monitoring device for a garbage sorting kiosk according to claim 1, characterized in that: The top rod is a square rod, and the second through hole is a square hole.

3. A monitoring device for a garbage sorting kiosk according to claim 1, characterized in that: The second through hole is located on the top wall of the filter device housing, and the cylinder is located on the outer top wall of the filter device housing.

4. A monitoring device for a garbage sorting kiosk according to claim 1, characterized in that: A conical tube is installed on the side of the HEPA filter close to the exhaust fan. One end of the conical tube is square and the other end is round. The diameter of the round end of the conical tube is equal to the overall diameter of the fan blade.

5. A monitoring device for a garbage sorting kiosk according to claim 4, characterized in that: A straight pipe is horizontally installed at one circular end of each tapered tube, and the length of the straight pipe is two to three times the length of the tapered tube.

6. A monitoring device for a garbage sorting kiosk according to claim 1, characterized in that: The cross-section of the bracket 1 is elliptical.

7. A monitoring device for a garbage sorting kiosk according to claim 1, characterized in that: The odor detector is located on the gas outlet side of the exhaust fan impeller.

8. A monitoring device for a garbage sorting kiosk according to claim 1, characterized in that: The fan blade material is polyethylene.

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