Nitrogen generator with dust filtering function

Abstract

The utility model discloses a kind of nitrogen making machine with dust filtering function, it includes: primary efficiency air filter mechanism, for the sundries and dust particle in external air are carried out primary efficiency filtration and make external air is transported in certain direction;Freeze dryer, for receiving the air transported by the primary efficiency air filter mechanism and drying moisture in air;Bag-type dust collector, for receiving the air transported by the freeze dryer and carrying out middle efficiency filtration to dust particle in air;Electrostatic precipitator, for receiving the air transported by the bag-type dust collector and carrying out high efficiency filtration to dust particle in air;Nitrogen making machine body, for receiving the air transported by the electrostatic precipitator and carrying out preparation nitrogen gas.The utility model can effectively remove impurity and dust particle in air, also avoid the impurity and dust particle in air to cause the plugging condition of filtration structure on primary efficiency air filter mechanism to occur.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen generator technology, specifically a nitrogen generator with dust filtration function. Background Technology

[0002] Pressure swing adsorption (PSA) nitrogen generators use air as raw material and high-quality carbon molecular sieves as adsorbents. Utilizing the principle of PSA, the microporous molecular sieve selectively adsorbs air to achieve oxygen-nitrogen separation. However, existing nitrogen generators introduce a certain amount of dust into the air. If this dust enters the generator without treatment, it can affect the safety and lifespan of the internal components. Therefore, a dust filtration system needs to be installed in the nitrogen generator to improve the purity of the air entering it.

[0003] A search revealed that patent publication number CN222239304U discloses a nitrogen generator with dust filtration function, comprising a nitrogen generator body, a fixed cover, and a motor. The nitrogen generator body has an air inlet on its left side, and an air inlet pipe is fixedly inserted inside the air inlet. The upper and lower ends of the air inlet pipe symmetrically abut against clamping rods, and the outer wall of the clamping rods is connected to a threaded rod via bearings. A connecting rod is sleeved on the surface of the threaded rod, and a fixing block is fixedly connected to the left side surface of the connecting rod. The fixing block is fixedly connected to the outer wall of the fixed cover. This invention, through the cooperation of fan blades and a movable rod, can accelerate the delivery of air to the interior of the nitrogen generator body. Before the air enters the interior of the nitrogen generator body, a first filter plate can filter dust in the air. The filtered air then enters the interior of the nitrogen generator body, thus filtering dust and achieving the effect of dust filtration.

[0004] In practical use, the above-mentioned technical solutions only perform preliminary filtration of impurities and dust particles in the air, which cannot effectively remove dust particles. The filtered air will still contain a certain amount of dust particles. If air containing dust particles enters the nitrogen generator, it can easily cause internal malfunctions. Furthermore, in practical use, if impurities enter the filter holes of the first filter plate and cause blockage, the scraping structure cannot easily remove the impurities blocking the filter holes. Operators need to stop the machine and clean the first filter plate, which affects the efficiency of nitrogen generation. Therefore, a nitrogen generator with dust filtration function is designed. Utility Model Content

[0005] In view of the defects or deficiencies of existing nitrogen generators, the purpose of this utility model is to provide a nitrogen generator with dust filtration function, which can effectively remove impurities and dust particles in the air, and also avoid the situation where impurities and dust particles in the air cause blockage of the filter structure on the primary air filter mechanism.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a nitrogen generator with dust filtration function, comprising: a primary air filter mechanism for primary filtration of impurities and dust particles in external air and for conveying external air in a certain direction; a freeze dryer for receiving the air conveyed by the primary air filter mechanism and drying the moisture in the air; a bag filter for receiving the air conveyed by the freeze dryer and for medium-efficiency filtration of dust particles in the air; an electrostatic precipitator for receiving the air conveyed by the bag filter and for high-efficiency filtration of dust particles in the air; and a nitrogen generator body for receiving the air conveyed by the electrostatic precipitator and generating nitrogen gas.

[0008] The primary air filter mechanism is equipped with a plate-type coarse filter for filtering impurities in the air and a plate-type primary air filter for primary filtration of dust particles in the air. The primary air filter mechanism also includes an installation assembly for mounting the plate-type primary air filter, and a first extrusion assembly and a second extrusion assembly for driving the plate-type primary air filter to reciprocate in a certain direction. The primary air filter mechanism has a housing, and includes an air-guiding assembly for cleaning the plate-type coarse filter and guiding air into the housing. A cleaning assembly is also provided for cleaning the filter holes on the plate-type coarse filter. Finally, a reduction motor is provided to drive the first extrusion assembly, the second extrusion assembly, and the air-guiding assembly to rotate.

[0009] Preferably, the plate-type coarse filter screen is installed on the end wall of one end of the air inlet pipe, and the other end of the air inlet pipe is set on the outer wall of one side of the housing. A first connecting frame is provided on the circumferential inner wall of one end of the air inlet pipe.

[0010] The cleaning assembly is composed of a top column, a first spring, a Z-shaped extrusion rod, a cleaning frame, and a first limiting plate.

[0011] The outer wall of the plate-type coarse filter is provided with a first guide post at the top and bottom. The other end of the first guide post passes through the through hole on the outer wall of the cleaning frame and is connected to the first limiting plate. The first guide post and the first limiting plate are connected by a threaded fit. A first spring is sleeved on the outer side of the outer wall of the first guide post. The first spring is located between the first limiting plate and the cleaning frame and between the cleaning frame and the plate-type coarse filter. A top post is provided on one side of the outer wall of the cleaning frame. Z-shaped extrusion rods are installed at the front end and rear end of the other side of the outer wall of the cleaning frame. The other end of the Z-shaped extrusion rod is in contact with one side of the outer wall of the plate-type air pre-filter.

[0012] The cleaning rack is installed inside the air inlet pipe, and the outer circumferential wall of the cleaning rack and the inner circumferential wall of the air inlet pipe are fitted with a clearance.

[0013] Preferably, the mounting assembly is provided with two U-shaped clamps, which are located at the top and bottom of the housing respectively, and the two U-shaped clamps are clearance fit with the top and bottom of the housing respectively.

[0014] The two ends of the plate-type primary air filter are respectively installed in the U-shaped grooves of the two U-shaped plates, and the end walls of both ends of the plate-type primary air filter are in clearance fit with the groove walls of the U-shaped grooves of the two U-shaped plates. Extrusion frames are installed on the upper and lower sides of one outer wall of the plate-type primary air filter.

[0015] The front and rear ends of the outer walls on both sides of the U-shaped card plate are equipped with second guide posts. The other end of the second guide post passes through the through hole on the outer wall of the connecting block and is connected to the second limiting plate. The second guide post and the second limiting plate are connected by a threaded connection. A second spring is sleeved on the outer side of the outer wall of the second guide post and the second spring is located between the U-shaped card plate and the connecting block. The connecting block is installed at the top and bottom of the housing.

[0016] Preferably, both the first extrusion assembly and the second extrusion assembly are composed of a second rotating shaft, a cam, and a second bevel gear. A cam is provided on the circumferential outer wall of the second rotating shaft, and a second bevel gear is installed at one end of the second rotating shaft. Both the second bevel gear and the cam are located inside the housing.

[0017] Preferably, the other end of the second rotating shaft on the first extrusion assembly extends through a sealed bearing on the top of the housing to the outside and is connected to a geared motor via a coupling. The geared motor is mounted on the top of the mounting bracket, and the output shaft of the geared motor extends through the top of the mounting bracket, which is also mounted on the top of the housing.

[0018] The other end of the second shaft on the second extrusion assembly is mounted in a bearing at the center of the surface of the second connecting frame.

[0019] Preferably, the air-guiding assembly is composed of a brush plate, a first bevel gear, fan blades and a first rotating shaft, wherein fan blades are provided on the circumferential outer wall of the first rotating shaft and the fan blades are located inside the housing;

[0020] One end of the first rotating shaft passes through the bearing on the outer wall of the first connecting frame, the through hole at the center of the outer wall of the cleaning frame, and the sealed bearing at the center of the outer wall of the plate coarse filter screen, extending to the outside and connecting with the brush plate. The bristles on the brush plate contact one side of the outer wall of the plate coarse filter screen.

[0021] The other end of the first shaft is equipped with a first bevel gear, which meshes with a second bevel gear.

[0022] Preferably, the second connecting frame is disposed on the circumferential inner wall of the dust exhaust pipe, the dust exhaust pipe is disposed on one side of the bottom end of the housing, a dust collection trough is disposed on the circumferential outer wall of the dust exhaust pipe, and the dust collection trough is connected to the dust exhaust pipe by a threaded connection, an air outlet pipe is disposed on the other side outer wall of the housing, and a sealing door is disposed on the front end wall of the housing.

[0023] Preferably, the air outlet of the primary air filter is connected to the air inlet of the freeze dryer via a conveying pipe, the air outlet of the freeze dryer is connected to the air inlet of the bag filter via a conveying pipe, the air outlet of the bag filter is connected to the air inlet of the electrostatic precipitator via a conveying pipe, and the air outlet of the electrostatic precipitator is connected to the air inlet of the nitrogen generator body via a conveying pipe.

[0024] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0025] 1. In this utility model, through a series of coordinated structural arrangements, the primary air filter can perform primary filtration of impurities and dust particles in the air, removing impurities and visible dust. The freeze dryer dries the air after primary filtration, removing moisture. The bag filter performs medium-efficiency filtration of the dried air, removing finer dust particles. The electrostatic precipitator performs high-efficiency filtration of the air after medium-efficiency filtration, removing submicron-sized dust particles. This ensures that the air entering the nitrogen generator is free of dust impurities. Thus, this utility model can effectively remove impurities and dust particles from the air, preventing dust particles from entering the nitrogen generator and causing malfunctions inside the generator.

[0026] 2. In this utility model, through a series of coordinated structural arrangements, when the plate-type coarse filter and plate-type primary air filter on the primary air filtration mechanism perform primary filtration of impurities and dust particles in the air, the starting of the geared motor drives the first extrusion assembly, the second extrusion assembly, and the induced draft assembly to rotate. When the fan blades on the induced draft assembly rotate, they draw external air into the housing. When the brush plate on the induced draft assembly rotates, it cleans the impurities adsorbed on one side of the outer wall of the plate-type coarse filter. When the cams on the first and second extrusion assemblies rotate, they cause reciprocating extrusion of the plate-type primary air filter. After being subjected to reciprocating extrusion, the plate-type primary air filter will generate reciprocating vibration, and the plate-type primary air filter will reciprocate. The vibration of the machine shakes off the dust particles adsorbed by the plate-type pre-filter, preventing them from clogging the filter. The reciprocating vibration of the pre-filter also causes reciprocating compression of the Z-shaped compression rod, which in turn compresses the cleaning frame. This compression causes the top column to move in a certain direction, pushing out impurities clogged in the filter holes of the plate-type coarse filter. This prevents airborne impurities and dust particles from clogging the filter structure of the pre-filter, eliminating the need for manual cleaning of the plate-type coarse filter or pre-filter. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0029] Figure 2 This is a schematic diagram of the primary air filtration mechanism of this utility model.

[0030] Figure 3 This is a cross-sectional view of the primary air filtration mechanism of this utility model. Figure 1 .

[0031] Figure 4 This is a cross-sectional view of the primary air filtration mechanism of this utility model. Figure 2 .

[0032] Figure 5 This is a schematic diagram of the connection structure between the plate-type coarse filter screen and the cleaning component of this utility model.

[0033] Figure 6This is a structural schematic diagram of the cleaning rack of this utility model.

[0034] Figure 7 This is a schematic diagram of the air inlet pipe of this utility model.

[0035] Figure 8 This is a schematic diagram of the connection structure between the installation component and the plate-type primary air filter of this utility model.

[0036] Figure 9 This is a schematic diagram of the structure of the air intake component of this utility model.

[0037] Figure 10 This is a schematic diagram of the structure of the first extrusion assembly and the second extrusion assembly of this utility model.

[0038] In the picture:

[0039] 100. Primary air filter;

[0040] 110. Housing; 111. Mounting bracket; 112. Air inlet duct; 1121. First connecting bracket; 113. Dust collection tank; 114. Dust exhaust duct; 115. Second connecting bracket; 116. Air outlet duct;

[0041] 120. Gear motor;

[0042] 130. Air intake assembly; 131. Brush plate; 132. First bevel gear; 133. Fan blades; 134. First rotating shaft;

[0043] 140. Plate-type coarse filter screen; 141. First guide post;

[0044] 150. Mounting component; 151. U-shaped clamping plate; 152. Second spring; 153. Connecting block; 154. Second guide post; 155. Second limiting plate;

[0045] 160. Panel-type primary air filter; 161. Extrusion frame;

[0046] 170. First extrusion assembly;

[0047] 180. Second extrusion assembly; 181. Second rotating shaft; 182. Cam; 183. Second bevel gear;

[0048] 190. Cleaning assembly; 191. Top column; 192. First spring; 193. Z-shaped compression rod; 194. Cleaning frame; 195. First limiting plate;

[0049] 200. Freeze dryer;

[0050] 300. Baghouse dust collector;

[0051] 400. Electrostatic precipitator;

[0052] 500. Nitrogen generator body. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0054] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] like Figure 1-10 As shown, a nitrogen generator with dust filtration function includes:

[0057] The primary air filter 100 is used to perform primary filtration of debris and dust particles in the outside air and to transport the outside air in a certain direction.

[0058] The freeze dryer 200 is used to receive the air delivered by the primary air filter 100 and dry the moisture in the air.

[0059] The bag filter 300 is used to receive the air delivered by the freeze dryer 200 and to perform medium-efficiency filtration on the dust particles in the air.

[0060] Electrostatic precipitator 400 is used to receive the air delivered by bag filter 300 and to filter the dust particles in the air efficiently.

[0061] The nitrogen generator body 500 is used to receive the air supplied by the electrostatic precipitator 400 and produce nitrogen gas.

[0062] The primary air filter mechanism 100 is equipped with a plate-type coarse filter 140 for filtering impurities in the air and a plate-type primary air filter 160 for primary filtration of dust particles in the air. The primary air filter mechanism 100 is also equipped with a mounting assembly 150 for mounting the plate-type primary air filter 160, and a first extrusion assembly 170 and a second extrusion assembly 180 for driving the plate-type primary air filter 160 to reciprocate in a certain direction. The structure 100 is provided with a housing 110. The primary air filter mechanism 100 is provided with an air-guiding component 130 for cleaning the plate coarse filter screen 140 and guiding air into the housing 110. The primary air filter mechanism 100 is provided with a cleaning component 190 for cleaning the filter holes on the plate coarse filter screen 140. The primary air filter mechanism 100 is provided with a geared motor 120 for driving the first extrusion component 170, the second extrusion component 180 and the air-guiding component 130 to rotate.

[0063] A plate-type coarse filter screen 140 is installed on the end wall of one end of the air inlet pipe 112, and the other end of the air inlet pipe 112 is set on the outer wall of one side of the housing 110. A first connecting frame 1121 is provided on the circumferential inner wall of one end of the air inlet pipe 112.

[0064] The cleaning assembly 190 is composed of a top column 191, a first spring 192, a Z-shaped extrusion rod 193, a cleaning frame 194, and a first limiting plate 195;

[0065] First guide posts 141 are provided on both the upper and lower sides of one side of the outer wall of the plate-type coarse filter screen 140. The other end of the first guide post 141 passes through the through hole on the outer wall of the cleaning frame 194 and is connected to the first limiting plate 195. The outer wall of the first guide post 141 and the through hole on the cleaning frame 194 are clearance fit, which can limit and guide the movement of the cleaning frame 194. The first guide post 141 and the first limiting plate 195 are threadedly connected. A first spring 192 is sleeved on the outer side of the outer wall of the first guide post 141. The first spring 192 is located between the first limiting plate 195 and the cleaning frame 194 and between the cleaning frame 194 and the plate. Between the coarse filter screens 140, a top column 191 is provided on one side of the outer wall of the cleaning frame 194. Z-shaped extrusion rods 193 are installed at the front and rear ends of the other side of the outer wall of the cleaning frame 194. The other end of the Z-shaped extrusion rods 193 is in contact with one side of the outer wall of the plate-type primary air filter screen 160. When the Z-shaped extrusion rods 193 are subjected to a certain force in a certain direction, they will be transmitted to the cleaning frame 194. After the cleaning frame 194 is subjected to a certain force, it will squeeze the first spring 192 and move in a certain direction. When the cleaning frame 194 moves, it will drive the top column 191 to push the impurities blocked in the filter holes of the plate-type coarse filter screen 140 to the outside.

[0066] The cleaning frame 194 is installed inside the air inlet pipe 112, and the outer circumferential wall of the cleaning frame 194 and the inner circumferential wall of the air inlet pipe 112 are in clearance fit. Because the outer circumferential wall of the cleaning frame 194 and the inner circumferential wall of the air inlet pipe 112 are in clearance fit, the movement of the cleaning frame 194 can be further limited and guided.

[0067] The mounting assembly 150 is provided with two U-shaped clamping plates 151, which are located at the top and bottom of the housing 110 respectively, and the two U-shaped clamping plates 151 are clearance fit with the top and bottom of the housing 110 respectively.

[0068] The two ends of the plate-type primary air filter 160 are respectively installed in the U-shaped grooves on the two U-shaped clamping plates 151, and the end walls of both ends of the plate-type primary air filter 160 are clearance-fitted with the groove walls of the U-shaped grooves on the two U-shaped clamping plates 151. Because the end walls of both ends of the plate-type primary air filter 160 are clearance-fitted with the groove walls of the U-shaped grooves on the two U-shaped clamping plates 151, it is convenient for the staff to disassemble, replace or clean the plate-type primary air filter 160. The upper and lower sides of one side of the outer wall of the plate-type primary air filter 160 are equipped with compression frames 161.

[0069] The front and rear ends of the outer walls on both sides of the U-shaped clamping plate 151 are equipped with second guide posts 154. The other end of the second guide post 154 passes through the through hole on the outer wall of the connecting block 153 and is connected to the second limiting plate 155. The second guide post 154 and the second limiting plate 155 are connected by a threaded fit. The outer wall of the second guide post 154 and the through hole on the connecting block 153 are in clearance fit, which can indirectly limit and guide the movement of the plate-type air primary filter 160. A second spring 152 is sleeved on the outer side of the outer wall of the second guide post 154, and the second spring 152 is located between the U-shaped clamping plate 151 and the connecting block 153. The connecting block 153 is installed at the top and bottom of the housing 110.

[0070] The first extrusion assembly 170 and the second extrusion assembly 180 are both composed of a second rotating shaft 181, a cam 182 and a second bevel gear 183. The cam 182 is provided on the circumferential outer wall of the second rotating shaft 181, and the second bevel gear 183 is installed at one end of the second rotating shaft 181. The second bevel gear 183 and the cam 182 are both located inside the housing 110.

[0071] The other end of the second rotating shaft 181 on the first extrusion assembly 170 extends through the sealed bearing on the top of the housing 110 to the outside and is connected to the geared motor 120 through a coupling. The geared motor 120 is mounted on the top of the mounting bracket 111, and the output shaft of the geared motor 120 extends through the top of the mounting bracket 111. The mounting bracket 111 is mounted on the top of the housing 110. When the geared motor 120 is started, it will drive the second rotating shaft 181 and the second bevel gear 183 on the first extrusion assembly 170 to rotate.

[0072] The other end of the second shaft 181 on the second extrusion assembly 180 is mounted in a bearing located at the center of the surface of the second connecting frame 115.

[0073] The air intake assembly 130 is composed of a brush plate 131, a first bevel gear 132, a fan blade 133 and a first rotating shaft 134. The fan blade 133 is provided on the circumferential outer wall of the first rotating shaft 134 and the fan blade 133 is located inside the housing 110.

[0074] One end of the first rotating shaft 134 passes through the bearing on the outer wall of the first connecting frame 1121, the through hole at the center of the outer wall of the cleaning frame 194, and the sealed bearing at the center of the outer wall of the plate coarse filter 140, extending to the outside and connecting with the brush plate 131. The bristles on the brush plate 131 contact one side of the outer wall of the plate coarse filter 140.

[0075] A first bevel gear 132 is installed at the other end of the first rotating shaft 134. The first bevel gear 132 is meshed with a second bevel gear 183. When the second bevel gear 183 on the first extrusion assembly 170 rotates, it will drive the first bevel gear 132 to rotate. When the first bevel gear 132 rotates, it will drive the first rotating shaft 134 and the second bevel gear 183 and the second rotating shaft 181 on the second extrusion assembly 180 to rotate. When the second rotating shaft 181 rotates, it will drive the cam 182 to rotate. When the cam 182 rotates, it will cause reciprocating extrusion on the extrusion frame 161 on the plate-type air pre-filter 160. When the first rotating shaft 134 rotates, it will drive the fan blades 133 and the brush plate 131 to rotate.

[0076] The second connecting frame 115 is installed on the inner circumferential wall of the dust exhaust pipe 114. The dust exhaust pipe 114 is installed on one side of the bottom end of the housing 110. A dust collection trough 113 is installed on the outer circumferential wall of the dust exhaust pipe 114, and the dust collection trough 113 is connected to the dust exhaust pipe 114 by a threaded connection. The dust collection trough 113 is used to collect dust particles that fall off the plate-type primary air filter 160. An air outlet pipe 116 is installed on the outer wall of the other side of the housing 110, and a sealing door is installed on the front wall of the housing 110.

[0077] The air outlet of the primary air filter 100 is connected to the air inlet of the freeze dryer 200 via a conveying pipe. The air outlet of the freeze dryer 200 is connected to the air inlet of the bag filter 300 via a conveying pipe. The air outlet of the bag filter 300 is connected to the air inlet of the electrostatic precipitator 400 via a conveying pipe. The air outlet of the electrostatic precipitator 400 is connected to the air inlet of the nitrogen generator body 500 via a conveying pipe.

[0078] Working Principle: When in use, upon connection to an external power source, the primary air filter 100 performs initial filtration of impurities and dust particles in the air, removing impurities and visible dust. The freeze dryer 200 dries the air after primary filtration, removing moisture. The bag filter 300 performs medium-efficiency filtration of the dried air, removing finer dust particles. The electrostatic precipitator 400 performs high-efficiency filtration of the medium-efficiency filtered air, removing submicron-sized dust particles, ensuring that the air entering the nitrogen generator body 500 is free of dust and impurities. This invention... It can effectively remove impurities and dust particles from the air, preventing dust particles from entering the nitrogen generator body 500 and causing internal malfunctions. When the plate-type coarse filter 140 and plate-type primary air filter 160 on the primary air filter mechanism 100 perform primary filtration of impurities and dust particles in the air, the geared motor 120 starts and drives the first extrusion assembly 170, the second extrusion assembly 180 and the induced draft assembly 130 to rotate. When the fan blades 133 on the induced draft assembly 130 rotate, they draw external air into the housing 110. When the brush plate 131 rotates, it cleans the impurities adsorbed on one side of the outer wall of the plate coarse filter 140. When the cam 182 on the first extrusion assembly 170 and the second extrusion assembly 180 rotates, it causes reciprocating extrusion of the plate air pre-filter 160. After being subjected to reciprocating extrusion, the plate air pre-filter 160 will generate reciprocating vibration. When the plate air pre-filter 160 generates reciprocating vibration, it shakes off the dust particles adsorbed by the plate air pre-filter 160, preventing the dust particles from clogging the plate air pre-filter 160. The plate air pre-filter 160 reciprocates and vibrates. During operation, the Z-shaped extrusion rod 193 is subjected to reciprocating extrusion. When the Z-shaped extrusion rod 193 is subjected to reciprocating extrusion, it will cause the cleaning frame 194 to be subjected to reciprocating extrusion. When the cleaning frame 194 is subjected to reciprocating extrusion, it will drive the top column 191 to move reciprocally in a certain direction. When the top column 191 moves reciprocally in a certain direction, it can push out the impurities blocked in the filter holes of the plate coarse filter 140, thereby avoiding the situation where impurities and dust particles in the air block the filter structure on the primary air filter mechanism 100. There is no need for the operator to stop the machine to clean the plate coarse filter 140 or the plate primary air filter 160.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A nitrogen generator with dust filtration function, characterized in that, include: A primary air filter (100) is used to perform primary filtration of debris and dust particles in the outside air and to transport the outside air in a certain direction. A freeze dryer (200) is used to receive the air delivered by the primary air filter (100) and dry the moisture in the air; A bag filter (300) is used to receive the air delivered by the freeze dryer (200) and to perform medium-efficiency filtration of airborne dust particles; An electrostatic precipitator (400) is used to receive the air delivered by the bag filter (300) and to efficiently filter the dust particles in the air. The nitrogen generator body (500) is used to receive the air delivered by the electrostatic precipitator (400) and produce nitrogen gas; The primary air filter mechanism (100) is provided with a plate-type coarse filter screen (140) for filtering impurities in the air and a plate-type primary air filter screen (160) for primary filtering of dust particles in the air. The primary air filter mechanism (100) is provided with an installation assembly (150) for installing the plate-type primary air filter screen (160) and a first extrusion assembly (170) and a second extrusion assembly (180) for driving the plate-type primary air filter screen (160) to reciprocate in a certain direction. The primary air filter mechanism (100) is provided with The housing (110) is provided with an air intake assembly (130) for cleaning the plate coarse filter screen (140) and drawing air into the housing (110). The primary air filter mechanism (100) is provided with a cleaning assembly (190) for cleaning the filter holes on the plate coarse filter screen (140). The primary air filter mechanism (100) is provided with a geared motor (120) for driving the first extrusion assembly (170), the second extrusion assembly (180) and the air intake assembly (130) to rotate.

2. The nitrogen generator with dust filtration function according to claim 1, characterized in that: The plate-type coarse filter screen (140) is installed on the end wall of one end of the air inlet pipe (112), and the other end of the air inlet pipe (112) is set on the outer wall of one side of the housing (110). A first connecting frame (1121) is provided on the circumferential inner wall of one end of the air inlet pipe (112). The cleaning assembly (190) is composed of a top column (191), a first spring (192), a Z-shaped extrusion rod (193), a cleaning frame (194), and a first limiting plate (195); The plate-type coarse filter (140) has a first guide post (141) above and below one side of its outer wall. The other end of the first guide post (141) passes through the through hole on the outer wall of the cleaning frame (194) and is connected to the first limiting plate (195). The first guide post (141) and the first limiting plate (195) are connected by a threaded fit. A first spring (192) is sleeved on the outer side of the outer wall of the first guide post (141). The first spring (192) is located between the first limiting plate (195) and the cleaning frame (194) and between the cleaning frame (194) and the plate-type coarse filter (140). A top post (191) is provided on one side of the outer wall of the cleaning frame (194). Z-shaped extrusion rods (193) are installed at the front end and rear end of the other side of the outer wall of the cleaning frame (194). The other end of the Z-shaped extrusion rods (193) is in contact with one side of the outer wall of the plate-type air primary filter (160). The cleaning rack (194) is located inside the air inlet pipe (112), and the outer circumferential wall of the cleaning rack (194) and the inner circumferential wall of the air inlet pipe (112) are in clearance fit.

3. The nitrogen generator with dust filtration function according to claim 1, characterized in that: The mounting assembly (150) is provided with two U-shaped clamps (151), the two U-shaped clamps (151) are located at the top and bottom of the housing (110) respectively, and the two U-shaped clamps (151) are clearance fit with the top and bottom of the housing (110) respectively. The two ends of the plate-type primary air filter (160) are respectively installed in the U-shaped grooves on the two U-shaped clamps (151), and the end walls of both ends of the plate-type primary air filter (160) are in clearance fit with the groove walls of the U-shaped grooves on the two U-shaped clamps (151). Extrusion frames (161) are installed above and below one side of the outer wall of the plate-type primary air filter (160). The front and rear ends of the outer walls on both sides of the U-shaped card plate (151) are equipped with second guide posts (154). The other end of the second guide post (154) passes through the through hole on the outer wall of the connecting block (153) and is connected to the second limiting plate (155). The second guide post (154) and the second limiting plate (155) are connected by a threaded connection. A second spring (152) is sleeved on the outer side of the outer wall of the second guide post (154). The second spring (152) is located between the U-shaped card plate (151) and the connecting block (153). The connecting block (153) is installed at the top and bottom of the housing (110).

4. The nitrogen generator with dust filtration function according to claim 1, characterized in that: The first extrusion assembly (170) and the second extrusion assembly (180) are both composed of a second rotating shaft (181), a cam (182) and a second bevel gear (183). The cam (182) is provided on the circumferential outer wall of the second rotating shaft (181), and the second bevel gear (183) is installed at one end of the second rotating shaft (181). The second bevel gear (183) and the cam (182) are both located inside the housing (110).

5. The nitrogen generator with dust filtration function according to claim 4, characterized in that: The other end of the second rotating shaft (181) on the first extrusion assembly (170) extends through the sealed bearing on the top of the housing (110) to the outside and is connected to the geared motor (120) via a coupling. The geared motor (120) is mounted on the top of the mounting bracket (111), and the output shaft on the geared motor (120) extends through the top of the mounting bracket (111), and the mounting bracket (111) is mounted on the top of the housing (110). The other end of the second shaft (181) on the second extrusion assembly (180) is mounted in a bearing at the center of the surface of the second connecting frame (115).

6. The nitrogen generator with dust filtration function according to claim 5, characterized in that: The air intake assembly (130) is composed of a brush plate (131), a first bevel gear (132), a fan blade (133) and a first rotating shaft (134). The fan blade (133) is provided on the circumferential outer wall of the first rotating shaft (134), and the fan blade (133) is located inside the housing (110). One end of the first rotating shaft (134) passes through the bearing on the outer wall of the first connecting frame (1121), the through hole at the center of the outer wall of the cleaning frame (194), and the sealed bearing at the center of the outer wall of the plate coarse filter (140) in sequence, extends to the outside and connects with the brush plate (131), and the bristles on the brush plate (131) are in contact with one side of the outer wall of the plate coarse filter (140); The other end of the first shaft (134) is equipped with a first bevel gear (132), which meshes with a second bevel gear (183).

7. The nitrogen generator with dust filtration function according to claim 6, characterized in that: The second connecting frame (115) is set on the circumferential inner wall of the dust discharge pipe (114), the dust discharge pipe (114) is set on one side of the bottom end of the housing (110), the dust discharge pipe (114) is provided with a dust collection trough (113) on the circumferential outer wall, and the dust collection trough (113) and the dust discharge pipe (114) are connected by a threaded connection. The other side of the outer wall of the housing (110) is provided with an air outlet pipe (116), and the front end wall of the housing (110) is provided with a sealing door.

8. The nitrogen generator with dust filtration function according to claim 1, characterized in that: The outlet of the primary air filter (100) is connected to the inlet of the freeze dryer (200) via a conveying pipe. The outlet of the freeze dryer (200) is connected to the inlet of the bag filter (300) via a conveying pipe. The outlet of the bag filter (300) is connected to the inlet of the electrostatic precipitator (400) via a conveying pipe. The outlet of the electrostatic precipitator (400) is connected to the inlet of the nitrogen generator body (500) via a conveying pipe.

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