Oxygen concentration detection device for oxygen generator

Abstract

The invention discloses an oxygen concentration detection device for an oxygen generator, and relates to the technical field of oxygen concentration detection.The oxygen concentration detection device comprises an automatic cleaning device and an oxygen sensor, the automatic cleaning device adopts an automatic cleaning technology, and during and after oxygen concentration detection, the oxygen sensor is used for detecting the oxygen concentration by means of airflow formed when oxygen enters a detection area; the cleaning assembly is driven to automatically clean the sensing part of the oxygen sensor for multiple times, tiny impurities attached to the surface of the oxygen sensor are removed, meanwhile, in the cleaning process, the removed impurities are guided to the discharging channel in time under the driving of airflow and are automatically discharged out of a detection area through suction, and the detection efficiency is improved. Impurities are prevented from being retained in the detection cavity or attached to the surface of the oxygen sensor again, so that secondary pollution to the oxygen sensor is prevented, the surface of the oxygen sensor is kept clean during long-term use, the accuracy and stability of an oxygen concentration detection result are ensured, and the overall operation reliability of the oxygen generator is improved.

Description

Technical Field

[0001] This invention relates to the field of oxygen concentration detection technology, specifically an oxygen concentration detection device for an oxygen generator. Background Technology

[0002] Oxygen concentrators are widely used in medical, healthcare, and home oxygen therapy fields. They separate oxygen from the air through molecular sieve pressure swing adsorption and other methods to provide users with oxygen-enriched gas of a certain concentration and flow rate. Oxygen concentration is a key indicator for measuring the performance and safety of oxygen concentrators, and the accuracy and stability of its test results are directly related to the oxygen generation effect and the user experience.

[0003] During long-term operation, impurities will gradually accumulate inside the oxygen concentrator. When oxygen containing impurities enters the oxygen concentration detection device, it will contaminate the surface of the oxygen sensor, resulting in decreased sensor sensitivity and increased measurement error, which will affect the stability and safety of the oxygen concentrator in long-term use. Summary of the Invention

[0004] The technical problem to be solved by this invention is that surface contamination occurs in oxygen sensors during long-term use, and an oxygen concentration detection device for oxygen generators is provided.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: It includes a chamber, in which an automatic cleaning device and an oxygen sensor are installed, and the oxygen sensor is connected to a control system; the oxygen concentration detection device also includes an exhaust pump, an exhaust pipe, and a dust collection bag. The exhaust pipe is installed in the chamber, the exhaust pump is connected to the exhaust pipe, and the dust collection bag is connected to the exhaust pipe. During detection, the oxygen concentration detection device is connected to an oxygen generator, controlling the oxygen generator to enter the chamber. The oxygen sensor detects the oxygen concentration. After detection, the exhaust gas is discharged, and simultaneously, the automatic cleaning device cleans the surface of the oxygen sensor.

[0006] The automatic cleaning device includes a negative pressure component and a jet component, which are installed in the chamber. A reciprocating component is installed on one side of the negative pressure component. When oxygen enters from the negative pressure component, the jet component stores gas, and the negative pressure component drives the reciprocating component to move. The reciprocating component drives the cleaning component to clean the surface of the oxygen sensor. When oxygen is discharged from the outlet pipe, the negative pressure component drives the reciprocating component to move in the opposite direction again. The reciprocating component drives the cleaning component to clean the surface of the oxygen sensor again. At the same time, it triggers the gas stored in the jet component, which is introduced into the cleaning component to form a negative pressure, sucking the cleaned dust into the dust bag, ensuring the cleanliness of the oxygen sensor surface and ensuring the stability of the oxygen sensor during long-term use.

[0007] The jet assembly includes a gas storage tank, which is mounted on one side of the negative pressure assembly. A locking mechanism is installed on the gas storage tank, and an opening and closing mechanism is rotatably mounted on one side of the tank. A trigger ring is mounted on one side of the opening and closing mechanism and is also mounted on the negative pressure assembly. The gas storage tank stores oxygen when oxygen enters. When oxygen is discharged, the trigger ring moves the opening and closing mechanism, which in turn causes the gas storage tank to release gas. After a period of time, the trigger ring resets the opening and closing mechanism, which then stops the gas storage tank from releasing gas.

[0008] The negative pressure assembly includes an intake pipe mounted on the gas storage tank, with one end of the intake pipe located within the chamber. A piston is mounted on one side of the intake pipe, and a reciprocating assembly is mounted on one end of the piston. Oxygen enters the chamber through the intake pipe.

[0009] The intake pipe includes an intake chamber, a converging chamber on one side of the intake chamber, an intake pipe on the converging chamber, and an intake pipe mounted on the gas tank. A throat cavity is installed on one side of the converging chamber, a negative pressure pipe is installed on the throat cavity, and the negative pressure pipe is mounted on a piston. A diffuser cavity is installed on one side of the throat cavity. Oxygen enters the converging chamber from the intake chamber, and a portion of the oxygen enters the tank through the intake pipe. The oxygen enters the throat cavity and accelerates, creating a negative pressure at the negative pressure pipe. The oxygen in the throat cavity then enters the diffuser cavity and from there enters the gas chamber.

[0010] The piston includes a piston chamber with a limit ring installed on its inner wall. A negative pressure pipe is installed on the piston chamber, and a piston head is slidably mounted inside the piston chamber. A piston rod is mounted on the piston head, and a trigger ring is mounted on the piston rod. A reciprocating assembly is mounted on one end of the piston rod, and a first elastic element is sleeved on the piston rod. One end of the first elastic element is mounted on the piston head, and the other end is mounted inside the piston chamber. The first elastic element includes a first spring. When oxygen enters, the gas in the piston chamber is drawn from the negative pressure pipe into the throat chamber, and the piston head moves away from the first spring, driving the piston rod to move. When oxygen is discharged, the first spring drives the piston head to move closer to the first spring, driving the piston rod to move, providing a power source for subsequent cleaning.

[0011] The gas storage tank includes a tank body with a pressure relief valve installed on it. A gas intake pipe is installed on the tank body, and a one-way valve is installed inside the intake pipe. A connecting pipe is installed on one side of the tank body, and a locking mechanism is installed on the connecting pipe. A sliding column is slidably installed inside the connecting pipe, and an opening / closing mechanism rotates on the sliding column. A second elastic element is installed at one end of the sliding column, and the other end of the second elastic element is installed on the connecting pipe. The surface of the sliding column has grooves. An outlet pipe is installed on the other side of the tank body, and a conical column is slidably installed inside the outlet pipe. A connecting column is installed between the conical column and the sliding column. The second elastic element includes a second spring. Oxygen enters the tank body for storage. The one-way valve prevents oxygen backflow, and the pressure relief valve prevents excessive internal pressure in the tank. When the opening / closing mechanism moves the sliding column, the sliding column moves towards the guide column within the connecting pipe. The sliding column moves the connecting column towards the guide column, and the connecting column moves the conical column towards the guide column within the outlet pipe. Oxygen from inside the tank body is ejected from the outlet pipe to provide a gas source for impurity adsorption.

[0012] The locking mechanism includes a short tube mounted on the connecting pipe. A sliding groove is provided inside the short tube, and a pin is slidably installed within it. A limit plate is mounted on the pin, and the limit plate slides within the sliding groove. A third elastic element is mounted on one end of the limit plate, and one end of the third elastic element is mounted on the sliding groove. A pressure block is mounted on one side of the pin. The third elastic element includes a third spring. When the groove of the sliding post moves to the short tube, the third spring stretches, causing the limit plate to move closer to the sliding post within the sliding groove. The limit plate then causes the pin to move closer to the guide post until the pin is inserted into the groove, locking the movement of the sliding post. This allows the exhaust pipe to remain open for a period of time, ensuring that impurities cleaned from the oxygen sensor are adsorbed.

[0013] The opening and closing mechanism includes a guide post, which is installed on one side of the tank. A first conical block is slidably installed on the guide post, and a second conical block is installed on the first conical block. The taper of the first conical block is greater than that of the second conical block. A connecting rod is rotatably installed on the second conical block. The connecting rod rotates on a sliding post. A pressure plate is slidably installed on the guide post. One end of the pressure plate is installed on a piston rod, and the other end of the pressure plate slides on a short pipe. When oxygen enters, the trigger ring slides across the surface of the second conical block. When oxygen exits, the trigger ring presses against the first conical block, causing the first conical block to move away from the piston cavity. The first conical block then moves the second conical block away from the piston cavity. The second conical block rotates the connecting rod, which in turn moves the sliding column closer to the guide column. The piston rod moves the pressure plate along the short tube away from the piston cavity. When the piston rod reaches its initial position, the pressure plate presses against the pressure block, causing it to move away from the piston cavity. At this point, the pin leaves the groove, and the second spring returns the sliding column to its initial position, sealing the outlet pipe and preventing excessive gas from flowing out of the tank, thus maintaining a certain pressure inside the tank.

[0014] The trigger ring includes a ring body mounted on a piston rod. A slider is slidably mounted inside the ring body. A first wedge block is mounted on one end of the slider, and a second wedge block is mounted on the first wedge block. The slope of the first wedge block is greater than that of the second wedge block. A limit block is mounted on the slider, and a fourth elastic element is mounted on the limit block. One end of the fourth elastic element is installed inside the ring body. The fourth elastic element includes a fourth spring. When the ring body moves towards the piston chamber, the first wedge block abuts against the second conical block. Because the exhaust pipe restricts the movement of the conical column away from the guide column, the second conical block drives the slider to move away from the second conical block within the ring body. When the ring body moves away from the piston chamber, the second wedge block abuts against the first conical block, and the slider drives the first conical block to move. When the pin locks the sliding column, the first conical block drives the slider to move away from the first conical block within the ring body until the ring body returns to its initial position.

[0015] The reciprocating assembly includes a rack mounted on one end of the piston rod. A bracket and a lifting cylinder are installed within the chamber. A gear is rotatably mounted on the bracket, meshing with the rack. A cam is mounted on one side of the gear, with a cam groove. A convex rod slides within the cam groove, and an L-shaped plate is mounted on the convex rod. A lifting column is mounted on the L-shaped plate and slides within the lifting cylinder. A cleaning component is mounted on one end of the L-shaped plate. When the piston rod moves closer to the piston chamber, it drives the rack to move closer to the piston chamber. The rack drives the gear to rotate, which in turn drives the cam to rotate. The cam then drives the cam groove to rotate, causing the convex rod to move away from the lifting cylinder. The convex rod drives the L-shaped plate closer to the piston chamber, and the L-shaped plate drives the cleaning component closer to the piston chamber. This process is repeated when the piston rod moves away from the piston chamber.

[0016] The cleaning assembly includes a cleaning ring mounted on an L-shaped plate. The cleaning ring slides on the oxygen sensor. A flexible scraper ring is installed on the inner side of the cleaning ring. An intake pipe is attached to one end of the cleaning ring, connected to an outlet pipe via a flexible hose. An exhaust pipe is attached to the other end of the cleaning ring. The cleaning ring contains an air jet chamber and an exhaust chamber, connected to both the air jet chamber and the air jet chamber. A compression chamber is installed between the air jet chamber and the exhaust chamber, and a dust collection chamber is located within the compression chamber. When the cleaning ring slides on the oxygen sensor towards the piston chamber, the flexible scraper ring rubs against the surface of the oxygen sensor, removing impurities. These impurities are carried away by the incoming oxygen. When the cleaning ring slides away from the piston chamber, oxygen from the canister is sprayed from the outlet pipe into the air jet chamber. As the oxygen accelerates through the compression chamber, a negative pressure is created in the dust collection chamber, drawing the impurities scraped off by the flexible scraper ring into the compression chamber and then expelling them through the exhaust pipe into a dust bag, ensuring the cleanliness of the oxygen sensor surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention employs automatic cleaning technology. During and after oxygen concentration detection, the airflow generated when oxygen enters the detection area drives the cleaning component to automatically clean the sensing part of the oxygen sensor multiple times, removing tiny impurities adhering to the surface of the oxygen sensor. Simultaneously, during the cleaning process, the removed impurities are automatically discharged from the detection area, preventing impurities from remaining in the detection chamber or re-adhering to the surface of the oxygen sensor, thus preventing secondary contamination of the oxygen sensor. This ensures that the surface of the oxygen sensor remains clean during long-term use, thereby ensuring the accuracy and stability of oxygen concentration detection results and improving the overall reliability of the oxygen generator. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of the oxygen concentration detection device of the present invention;

[0020] Figure 2 The three-dimensional automatic cleaning device of the present invention Figure 1 ;

[0021] Figure 3 The three-dimensional automatic cleaning device of the present invention Figure 2 ;

[0022] Figure 4 This is a cross-sectional view of the air intake pipe of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the piston of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the gas storage tank of the present invention;

[0025] Figure 7 for Figure 6 A magnified view of a portion of region A in the middle;

[0026] Figure 8 This is a perspective view of the opening and closing mechanism of the present invention;

[0027] Figure 9 This is an exploded view of the trigger ring of the present invention;

[0028] Figure 10 This is a perspective view of the reciprocating component of the present invention;

[0029] Figure 11 This is a cross-sectional view of the cleaning component of the present invention.

[0030] In the diagram: 1. Automatic cleaning device; 11. Negative pressure assembly; 111. Inlet pipe; 1111. Inlet chamber; 1112. Converging chamber; 1113. Throat chamber; 1114. Diffusion chamber; 1115. Negative pressure pipe; 1116. Air intake pipe; 112. Piston; 1121. Piston chamber; 1122. Piston head; 1123. First elastic element; 1124. Piston rod; 12. Jet assembly; 121. Air tank; 1211. Tank body; 1212. Connecting pipe; 1213. Sliding column; 1214. Outlet pipe; 1215. Conical column; 122. Locking mechanism; 1221. Short pipe; 1222. Sliding groove; 1223. Pin; 1224. Limiting plate; 1225. Pressure block; 123 1. Opening and closing mechanism; 1231. Guide column; 1232. First conical block; 1233. Second conical block; 1234. Connecting rod; 1235. Pressure plate; 124. Trigger ring; 1241. Ring body; 1242. Slider; 1243. First wedge block; 1244. Second wedge block; 1245. Fourth elastic element; 13. Reciprocating assembly; 131. Rack; 132. Gear; 133. Cam; 134. Cam groove; 135. Protruding rod; 136. L-shaped plate; 137. Lifting cylinder; 14. Cleaning assembly; 141. Cleaning ring; 142. Inhalation pipe; 143. Jet chamber; 144. Exhaust chamber; 145. Compression chamber; 146. Dust suction chamber; 147. Exhaust pipe; 2. Oxygen sensor. Detailed Implementation

[0031] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example: Figures 1-11 As shown, the present invention provides a technical solution including a chamber, in which an automatic cleaning device 1 and an oxygen sensor 2 are installed. The oxygen sensor 2 is connected to a control system. During detection, the oxygen concentration detection device is connected to an oxygen generator, controlling the oxygen generator to enter the chamber. The oxygen sensor 2 detects the oxygen concentration. After detection, exhaust gas is discharged, and simultaneously, the automatic cleaning device 1 cleans the surface of the oxygen sensor 2.

[0033] The automatic cleaning device 1 includes a negative pressure component 11 and a jet component 12, which are installed in a chamber. A reciprocating component 13 is installed on one side of the negative pressure component 11. When oxygen enters from the negative pressure component 11, the jet component 12 stores gas, and the negative pressure component 11 drives the reciprocating component 13 to move. The reciprocating component 13 drives the cleaning component 14 to clean the surface of the oxygen sensor 2. When oxygen is discharged from the outlet pipe 1214, the negative pressure component 11 drives the reciprocating component 13 to move in the opposite direction again. The reciprocating component 13 drives the cleaning component 14 to clean the surface of the oxygen sensor 2 again. At the same time, the gas stored in the jet component 12 is triggered, and the gas is introduced into the cleaning component 14 to form a negative pressure, which sucks the cleaned dust into the dust bag, ensuring the cleanliness of the surface of the oxygen sensor 2 and ensuring the stability of the oxygen sensor 2 during long-term use.

[0034] The jet assembly 12 includes a gas storage tank 121, which is installed on one side of the negative pressure assembly 11. A locking mechanism 122 is installed on the gas storage tank 121, and an opening and closing mechanism 123 is rotatably installed on one side of the gas storage tank 121. A trigger ring 124 is installed on one side of the opening and closing mechanism 123, and the trigger ring 124 is installed on the negative pressure assembly 11. The gas storage tank 121 stores oxygen when oxygen enters. When oxygen is discharged, the trigger ring 124 drives the opening and closing mechanism 123 to move, causing the opening and closing mechanism 123 to cause the gas storage tank 121 to jet. After jetting for a period of time, the trigger ring 124 drives the opening and closing mechanism 123 to reset, and the opening and closing mechanism 123 causes the gas storage tank 121 to stop jetting.

[0035] The negative pressure assembly 11 includes an air inlet pipe 111, which is mounted on the air storage tank 121. One end of the air inlet pipe 111 is located inside the chamber, and a piston 112 is mounted on one side of the air inlet pipe 111. A reciprocating assembly 13 is mounted on one end of the piston 112. Oxygen enters the chamber through the air inlet pipe 111.

[0036] The intake pipe 111 includes an intake chamber 1111, a converging chamber 1112 installed on one side of the intake chamber 1111, an air intake pipe 1116 installed on the converging chamber 1112, the air intake pipe 1116 installed on the air storage tank 121, a throat 1113 installed on one side of the converging chamber 1112, a negative pressure pipe 1115 installed on the throat 1113, the negative pressure pipe 1115 installed on the piston 112, and a diffuser 1114 installed on one side of the throat 1113. Oxygen enters the converging chamber 1112 from the intake chamber 1111, a portion of the oxygen enters the tank 1211 from the air intake pipe 1116, the oxygen enters the throat 1113 and accelerates, creating a negative pressure at the negative pressure pipe 1115, the oxygen in the throat 1113 enters the diffuser 1114, and from the diffuser 1114 enters the chamber.

[0037] The piston 112 includes a piston chamber 1121, a limit ring is installed on the inner wall of the piston chamber 1121, a negative pressure pipe 1115 is installed on the piston chamber 1121, a piston head 1122 is slidably installed in the piston chamber 1121, a piston rod 1124 is installed on the piston head 1122, a trigger ring 124 is installed on the piston rod 1124, a reciprocating assembly 13 is installed on one end of the piston rod 1124, a first elastic element 1123 is sleeved on the piston rod 1124, one end of the first elastic element 1123 is installed on the piston head 1122, and the other end of the first elastic element 1123 is installed in the piston chamber 1121. The first elastic element 1123 includes a first spring. When oxygen enters, the gas in the piston chamber 1121 is drawn from the negative pressure pipe 1115 into the throat chamber 1113. The piston head 1122 moves away from the first spring, and the piston head 1122 drives the piston rod 1124 to move. When oxygen is discharged, the first spring drives the piston head 1122 to move closer to the first spring, and the piston head 1122 drives the piston rod 1124 to move, providing a power source for subsequent cleaning.

[0038] The gas storage tank 121 includes a tank body 1211, a pressure relief valve installed on the tank body 1211, a gas intake pipe 1116 installed on the tank body 1211, a one-way valve installed inside the gas intake pipe 1116, a connecting pipe 1212 installed on one side of the tank body 1211, a locking mechanism 122 installed on the connecting pipe 1212, a sliding column 1213 slidably installed inside the connecting pipe 1212, an opening and closing mechanism 123 rotating on the sliding column 1213, a second elastic element installed at one end of the sliding column 1213, one end of the second elastic element installed on the connecting pipe 1212, a groove provided on the surface of the sliding column 1213, a gas outlet pipe 1214 installed on the other side of the tank body 1211, a conical column 1215 slidably installed inside the gas outlet pipe 1214, and a connecting column installed between the conical column 1215 and the sliding column 1213. The second elastic element includes a second spring. Oxygen enters the tank 1211 for storage. A one-way valve prevents oxygen backflow, and a pressure relief valve prevents excessive pressure inside the tank 1211. When the opening and closing mechanism 123 moves the sliding column 1213, the sliding column 1213 moves towards the guide column 1231 in the connecting pipe 1212. The sliding column 1213 drives the connecting column to move towards the guide column 1231. The connecting column drives the conical column 1215 to move towards the guide column 1231 in the outlet pipe 1214. Oxygen inside the tank 1211 is sprayed out from the outlet pipe 1214 to provide a gas source for the adsorption of impurities.

[0039] The locking mechanism 122 includes a short tube 1221, which is mounted on the connecting tube 1212. A sliding groove 1222 is provided inside the short tube 1221. A pin 1223 is slidably installed inside the short tube 1221. A limit plate 1224 is installed on the pin 1223. The limit plate 1224 slides in the sliding groove 1222. A third elastic element is installed at one end of the limit plate 1224. One end of the third elastic element is installed on the sliding groove 1222. A pressure block 1225 is installed on one side of the pin 1223. The third elastic element includes a third spring. When the groove of the sliding post 1213 moves to the short tube 1221, the third spring stretches and drives the limiting plate 1224 to move closer to the sliding post 1213 in the sliding groove 1222. The limiting plate 1224 drives the pin 1223 to move closer to the guide post 1231 until the pin 1223 is inserted into the groove, locking the movement of the sliding post 1213, so that the exhaust pipe 1214 can remain open for a period of time, ensuring that the impurities cleaned on the oxygen sensor 2 can be adsorbed.

[0040] The opening and closing mechanism 123 includes a guide post 1231, which is installed on one side of the tank body 1211. A first conical block 1232 is slidably installed on the guide post 1231, and a second conical block 1233 is installed on the first conical block 1232. The taper of the first conical block 1232 is greater than that of the second conical block 1233. A connecting rod 1234 is rotatably installed on the second conical block 1233. The connecting rod 1234 rotates on the sliding post 1213. A pressure plate 1235 is slidably installed on the guide post 1231. One end of the pressure plate 1235 is installed on the piston rod 1124, and the other end of the pressure plate 1235 slides on the short pipe 1221. When oxygen enters, the trigger ring 124 slides across the surface of the second conical block 1233. When oxygen exits, the trigger ring 124 presses against the first conical block 1232. The trigger ring 124 drives the first conical block 1232 to move away from the piston chamber 1121. The first conical block 1232 drives the second conical block 1233 to move away from the piston chamber 1121. The second conical block 1233 drives the connecting rod 1234 to rotate. The connecting rod 1234 drives the sliding column 1213 to move closer to the guide column 1231. The piston rod 1... 124 drives the pressure plate 1235 to move away from the piston chamber 1121 on the short pipe 1221. When the piston rod 1124 moves to the initial position, the pressure plate 1235 presses on the pressure block 1225. The pressure plate 1235 drives the pressure block 1225 to move away from the piston chamber 1121. At this time, the pin 1223 leaves the groove, and the second spring drives the sliding column 1213 back to the initial position, sealing the gas outlet pipe 1214 to prevent too much gas from flowing out of the tank 1211 and to ensure that there is a certain pressure in the tank 1211.

[0041] The trigger ring 124 includes a ring body 1241, which is mounted on the piston rod 1124. A slider 1242 is slidably mounted inside the ring body 1241. A first wedge block 1243 is mounted on one end of the slider 1242. A second wedge block 1244 is mounted on the first wedge block 1243. The slope of the first wedge block 1243 is greater than the slope of the second wedge block 1244. A limit block is mounted on the slider 1242. A fourth elastic element 1245 is mounted on the limit block. One end of the fourth elastic element 1245 is mounted inside the ring body 1241. The fourth elastic element 1245 includes a fourth spring. When the ring body 1241 moves toward the piston chamber 1121, the first wedge block 1243 abuts against the second conical block 1233. Since the exhaust pipe 1214 restricts the conical column 1215 from moving away from the guide column 1231, the second conical block 1233 drives the slider 1242 to move away from the second conical block 1233 within the ring body 1241. When the ring body 1241 moves away from the piston chamber 1121, the second wedge block 1244 abuts against the first conical block 1232, and the slider 1242 drives the first conical block 1232 to move. When the pin 1223 locks the sliding column 1213, the first conical block 1232 drives the slider 1242 to move away from the first conical block 1232 within the ring body 1241 until the ring body 1241 returns to its initial position.

[0042] The reciprocating assembly 13 includes a rack 131, which is mounted on one end of the piston rod 1124. A bracket and a lifting cylinder 137 are installed in the chamber. A gear 132 is rotatably mounted on the bracket. The rack 131 and the gear 132 mesh. A cam 133 is mounted on one side of the gear 132. A cam groove 134 is provided on the cam 133. A protruding rod 135 is slidably mounted in the cam groove 134. An L-shaped plate 136 is mounted on the protruding rod 135. A lifting column is mounted on the L-shaped plate 136. The lifting column slides in the lifting cylinder 137. A cleaning assembly 14 is mounted on one end of the L-shaped plate 136. When the piston rod 1124 moves toward the piston chamber 1121, the piston rod 1124 drives the rack 131 to move toward the piston chamber 1121. The rack 131 drives the gear 132 to rotate. The gear 132 drives the cam 133 to rotate. The cam 133 drives the cam groove 134 to rotate. The cam groove 134 drives the cam rod 135 to move away from the lifting cylinder 137. The cam rod 135 drives the L-shaped plate 136 to move toward the piston chamber 1121. The L-shaped plate 136 drives the cleaning component 14 to move toward the piston chamber 1121. When the piston rod 1124 moves away from the piston chamber 1121, the above process is repeated.

[0043] The cleaning assembly 14 includes a cleaning ring 141, which is mounted on an L-shaped plate 136 and slides on the oxygen sensor 2. A flexible scraper ring is installed on the inner side of the cleaning ring 141. An air intake pipe 142 is installed at one end of the cleaning ring 141, and the air intake pipe 142 and the air outlet pipe 1214 are connected by a hose. An exhaust pipe 147 is installed at the other end of the cleaning ring 141. An air jet chamber 143 and an exhaust chamber 144 are provided inside the cleaning ring 141. The air jet chamber 143 is connected to the air intake pipe 142, and the exhaust chamber 144 is connected to the exhaust pipe 147. A compression chamber 145 is installed between the air jet chamber 143 and the exhaust chamber 144, and a dust suction chamber 146 is provided on the compression chamber 145. When the cleaning ring 141 slides on the oxygen sensor 2 toward the piston chamber 1121, the flexible scraper ring rubs against the surface of the oxygen sensor 2, removing impurities from the surface of the oxygen sensor 2. The removed impurities are carried away by the incoming oxygen. When the cleaning ring 141 slides on the oxygen sensor 2 away from the piston chamber 1121, the oxygen in the tank 1211 is sprayed from the outlet pipe 1214 into the jet chamber 143. When the oxygen flows accelerated from the compression chamber 145, a negative pressure is formed at the suction chamber 146, which sucks the impurities scraped off by the flexible scraper ring into the compression chamber 145 and discharges them into the dust bag from the exhaust pipe 147, ensuring the cleanliness of the surface of the oxygen sensor 2.

[0044] Working principle of the invention:

[0045] During testing, the oxygen concentration detection device is connected to the oxygen generator, controlling the oxygen from the oxygen generator to enter the converging chamber 1112 from the intake chamber 1111. A portion of the oxygen enters the tank 1211 from the gas intake pipe 1116 for storage. The oxygen enters the throat chamber 1113 and accelerates, forming a negative pressure at the negative pressure pipe 1115. The gas in the piston chamber 1121 is drawn from the negative pressure pipe 1115 into the throat chamber 1113. The piston head 1122 moves away from the first spring, and the piston head 1122 drives the piston rod 1124 to move. The oxygen in the throat chamber 1113 enters the diffusion chamber 1114 and then enters the chamber from the diffusion chamber 1114.

[0046] The piston rod 1124 drives the ring 1241 and the pressure plate 1235 to move closer to the piston chamber 1121. At this time, the first wedge block 1243 abuts against the second conical block 1233. Since the exhaust pipe 1214 restricts the movement of the conical column 1215 away from the guide column 1231, the second conical block 1233 drives the slider 1242 to move away from the second conical block 1233 within the ring 1241. The second conical block 1233 presses the slider 1242 back into the ring 1241. At the same time, the piston rod 1124 drives the rack 131 to move closer to the piston chamber 1121. The rack 131 drives the gear 132 to rotate, the gear 132 drives the cam 133 to rotate, the cam 133 drives the cam groove 134 to rotate, the cam groove 134 drives the cam rod 135 to move away from the lifting cylinder 137, the cam rod 135 drives the L-shaped plate 136 to move closer to the piston chamber 1121, the L-shaped plate 136 drives the cleaning ring 141 to move closer to the piston chamber 1121, the flexible scraper ring on the cleaning ring 141 rubs the surface of the oxygen sensor 2 to remove impurities from the surface of the oxygen sensor 2, the removed impurities are carried away by the entering oxygen and discharged from the exhaust pipe through the exhaust pump.

[0047] After the test is completed, the oxygen generator stops supplying oxygen. The first spring stretches, causing the piston head 1122 to move closer to the first spring. The piston head 1122 moves the piston rod 1124, which in turn moves the ring 1241 and the pressure plate 1235 away from the piston chamber 1121. At this time, the second wedge block 1244 abuts against the first cone block 1232. The slider 1242 moves the first cone block 1232, which in turn moves the second cone block 1233 away from the piston chamber 1121. The second cone block 1233 rotates the connecting rod 1234, which in turn moves the sliding column 1213 closer to the guide column 1231. Oxygen with a certain pressure inside the tank 1211 is ejected from the outlet pipe 1214. The air is sprayed into the jet chamber 143 through the hose. When the groove of the sliding post 1213 moves to the short pipe 1221, the third spring stretches and drives the limiting plate 1224 to move closer to the sliding post 1213 in the sliding groove 1222. The limiting plate 1224 drives the pin 1223 to move closer to the guide post 1231 until the pin 1223 is inserted into the groove, locking the movement of the sliding post 1213 and keeping the air outlet pipe 1214 spraying air into the jet chamber 143. Since the movement of the sliding post 1213 is locked, the first cone block 1232 drives the slider 1242 to move away from the first cone block 1232 in the ring body 1241. The first cone block 1232 presses the slider 1242 back into the ring body 1241 until the ring body 1241 moves below the second cone block 1233.

[0048] When the piston rod 1124 moves away from the piston chamber 1121, the piston rod 1124 drives the rack 131 to move away from the piston chamber 1121. The rack 131 drives the gear 132 to rotate in the opposite direction. The gear 132 drives the cam 133 to rotate in the opposite direction. The cam 133 drives the cam groove 134 to rotate in the opposite direction, causing the L-shaped plate 136 to drive the cleaning ring 141 to move away from the piston chamber 1121. The flexible scraper ring on the cleaning ring 141 cleans the surface of the oxygen sensor 2 again. At the same time, the oxygen sprayed from the tank 1211 enters the compression chamber 145 from the jet chamber 143. When the oxygen accelerates from the compression chamber 145, it forms a negative pressure at the suction chamber 146, sucking the impurities scraped off by the flexible scraper ring into the compression chamber 145. The impurities are discharged into the dust bag from the exhaust pipe 147 along with the oxygen, ensuring the cleanliness of the surface of the oxygen sensor 2.

[0049] When the piston rod 1124 returns to its initial position, the piston rod 1124 drives the pressure plate 1235 to press against the pressure block 1225. The pressure plate 1235 drives the pressure block 1225 to move away from the piston chamber 1121. The pressure block 1225 drives the pin 1223 to move away from the piston chamber 1121. At this time, the pin 1223 leaves the groove. The second spring is stretched and drives the sliding column 1213 to return to its initial position. The sliding column 1213 drives the conical column 1215 to close the gas outlet pipe 1214, preventing too much gas from flowing out of the tank 1211 and ensuring that there is a certain pressure inside the tank 1211.

[0050] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oxygen concentration detection device for an oxygen generator, characterized in that: The chamber is internally provided with an automatic cleaning device (1) and an oxygen sensor (2) connected to a control system. The automatic cleaning device (1) comprises a negative pressure assembly (11) and a jet assembly (12), the negative pressure assembly (11) and the jet assembly (12) are installed in the chamber, and one side of the negative pressure assembly (11) is provided with a reciprocating assembly (13). The jet assembly (12) comprises a gas storage tank (121), the gas storage tank (121) is installed on one side of the negative pressure assembly (11), the gas storage tank (121) is provided with a locking mechanism (122), one side of the gas storage tank (121) is rotatably provided with an opening and closing mechanism (123), one side of the opening and closing mechanism (123) is provided with a trigger ring (124), and the trigger ring (124) is installed on the negative pressure assembly (11).

2. The oxygen concentration detection device for an oxygen generator according to claim 1, characterized in that: The negative pressure assembly (11) comprises an air inlet pipe (111), the air inlet pipe (111) is installed on the gas storage tank (121), one end of the air inlet pipe (111) is located in the chamber, and one side of the air inlet pipe (111) is provided with a piston (112).

3. The oxygen concentration detection device for an oxygen generator according to claim 2, characterized in that: The air inlet pipe (111) comprises an air inlet cavity (1111), one side of the air inlet cavity (1111) is provided with a tapered cavity (1112), the tapered cavity (1112) is provided with a gas taking pipe (1116), the gas taking pipe (1116) is installed on the gas storage tank (121), one side of the tapered cavity (1112) is provided with a throat cavity (1113), the throat cavity (1113) is provided with a negative pressure pipe (1115), the negative pressure pipe (1115) is installed on the piston (112), and one side of the throat cavity (1113) is provided with a diffusion cavity (1114).

4. The oxygen concentration detection device for an oxygen generator according to claim 3, characterized in that: The piston (112) comprises a piston cavity (1121), a limiting ring is installed on the inner wall of the piston cavity (1121), the negative pressure pipe (1115) is installed on the piston cavity (1121), a piston head (1122) is slidably installed in the piston cavity (1121), the piston head (1122) is provided with a piston rod (1124), the trigger ring (124) is installed on the piston rod (1124), the reciprocating assembly (13) is installed on one end of the piston rod (1124), a first elastic member (1123) is sleeved on the piston rod (1124), one end of the first elastic member (1123) is installed on the piston head (1122), and the other end of the first elastic member (1123) is installed in the piston cavity (1121).

5. The oxygen concentration detection device for an oxygen generator according to claim 3, characterized in that: The gas tank (121) includes a tank body (1211), a pressure relief valve is installed on the tank body (1211), the gas taking pipe (1116) is installed on the tank body (1211), a one-way valve is installed in the gas taking pipe (1116), a connecting pipe (1212) is installed on one side of the tank body (1211), the locking mechanism (122) is installed on the connecting pipe (1212), a sliding column (1213) is slidingly installed in the connecting pipe (1212), the opening and closing mechanism (123) is rotated on the sliding column (1213), a second elastic member is installed on one end of the sliding column (1213), one end of the second elastic member is installed on the connecting pipe (1212), a groove is arranged on the surface of the sliding column (1213), a gas outlet pipe (1214) is installed on the other side of the tank body (1211), a tapered column (1215) is slidingly installed in the gas outlet pipe (1214), and a connecting column is installed between the tapered column (1215) and the sliding column (1213).

6. The oxygen concentration detection device for an oxygen generator according to claim 5, characterized in that: The locking mechanism (122) includes a short pipe (1221), the short pipe (1221) is installed on the connecting pipe (1212), a sliding groove (1222) is arranged in the short pipe (1221), a latch (1223) is slidingly installed in the short pipe (1221), a limiting plate (1224) is installed on the latch (1223), the limiting plate (1224) slides in the sliding groove (1222), a third elastic member is installed on one end of the limiting plate (1224), one end of the third elastic member is installed on the sliding groove (1222), and a pressing block (1225) is installed on one side of the latch (1223).

7. The oxygen concentration detection device for an oxygen generator according to claim 6, characterized in that: The opening and closing mechanism (123) includes a guide column (1231), the guide column (1231) is installed on one side of the tank body (1211), a first tapered block (1232) is slidingly installed on the guide column (1231), a second tapered block (1233) is installed on the first tapered block (1232), the taper of the first tapered block (1232) is greater than the taper of the second tapered block (1233), a connecting rod (1234) is rotatably installed on the second tapered block (1233), the connecting rod (1234) is rotated on the sliding column (1213), a pressing plate (1235) is slidingly installed on the guide column (1231), one end of the pressing plate (1235) is installed on the piston rod (1124), and the other end of the pressing plate (1235) slides on the short pipe (1221).

8. The oxygen concentration detection device for an oxygen generator according to claim 4, characterized in that: The trigger ring (124) comprises a ring body (1241) mounted on the piston rod (1124), a sliding block (1242) slidingly mounted in the ring body (1241), a first wedge block (1243) mounted at one end of the sliding block (1242), a second wedge block (1244) mounted on the first wedge block (1243), the slope of the first wedge block (1243) being greater than the slope of the second wedge block (1244), a limiting block mounted on the sliding block (1242), and a fourth elastic member (1245) mounted on the limiting block and at an inner portion of the ring body (1241).

9. The oxygen concentration detection device for an oxygen generator according to claim 5, characterized by: The reciprocating assembly (13) comprises a rack (131) mounted at one end of the piston rod (1124), a support and a lifting cylinder (137) mounted in the chamber, a gear wheel (132) rotatably mounted on the support, the rack (131) and the gear wheel (132) being engaged, a cam (133) mounted at one side of the gear wheel (132), a cam groove (134) provided on the cam (133), a cam rod (135) slidingly mounted in the cam groove (134), an L-shaped plate (136) mounted on the cam rod (135), a lifting column mounted on the L-shaped plate (136) and sliding in the lifting cylinder (137), and a cleaning assembly (14) mounted at one end of the L-shaped plate (136).

10. The oxygen concentration detection device for an oxygen generator according to claim 9, characterized in that: The cleaning assembly (14) comprises a cleaning ring (141) mounted on the L-shaped plate (136), the cleaning ring (141) sliding on the oxygen sensor (2), a flexible scraping ring mounted at an inner side of the cleaning ring (141), an air suction pipe (142) mounted at one end of the cleaning ring (141), the air suction pipe (142) and the air outlet pipe (1214) being connected by a hose, an air exhaust pipe (147) mounted at the other end of the cleaning ring (141), an air injection cavity (143) and an air exhaust cavity (144) provided in the cleaning ring (141), the air injection cavity (143) and the air suction pipe (142) being communicated, the air exhaust cavity (144) and the air exhaust pipe (147) being communicated, and a compression cavity (145) mounted between the air injection cavity (143) and the air exhaust cavity (144), the compression cavity (145) being provided with a dust suction cavity (146).

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