An oxygen concentrator using an oil-free scroll compressor

Abstract

This utility model discloses an oxygen concentrator using an oil-free scroll compressor, comprising a housing and a base. The base is equipped with an oxygen generation module, a flow guiding module, and a molecular sieve. The housing has an air inlet, which includes a sealing plate, a filter screen, a plug-in cylinder, and air inlet louvers. The air inlet louvers and the plug-in cylinder are both connected to the inner wall of the housing. The filter screen is adhered to the air inlet louvers. The sealing plate has a formed plug-in part, which is inserted into the plug-in cylinder to control the height of the sealing plate. When the sealing plate is in contact with the housing, the air inlet is sealed. This utility model solves the problem of air entering the oxygen concentrator even after it is stopped. By inserting the sealing plate, the sealing plate is completely attached to the housing, reducing the gap between the sealing plate and the housing. Furthermore, the oil-free scroll compressor compresses air by changing the gap between the moving and stationary discs, reducing noise and improving the purity of the oxygen.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generation equipment technology, specifically an oxygen generator that uses an oil-free scroll compressor. Background Technology

[0002] Molecular sieve oxygen generators are a new type of equipment that extracts oxygen from the air based on pressure swing adsorption (PSA) technology. They utilize the physical adsorption and desorption of molecular sieves, filling the generator with molecular sieves. Under pressure, nitrogen in the air is adsorbed, and the remaining unabsorbed oxygen is collected and purified to become high-purity oxygen. Specifically, compressed air is purified by an air purification dryer and then enters the adsorption tower through a switching valve. Inside the tower, nitrogen is adsorbed by the molecular sieves, and oxygen accumulates at the top before entering the oxygen storage tank. Finally, it is filtered through odor removal, dust removal, and sterilization filters to obtain qualified medical oxygen.

[0003] Medical molecular sieve oxygen concentrators require air filtration before nitrogen adsorption. The first step is to filter out particulate impurities from the air. Currently, the filter device in medical molecular sieve oxygen concentrators is installed inside the machine, making it difficult to clean. This affects the normal delivery of gas. After the oxygen concentrator is finished, outside air still enters the internal components and comes into contact with the molecular sieve, reducing its lifespan. Furthermore, the air compressor generates significant noise during operation, severely affecting patients' rest and hindering daily use. Utility Model Content

[0004] The purpose of this invention is to provide an oxygen generator that uses an oil-free scroll compressor. The air inlet is equipped with a plug-in part, and a plug-in cylinder is connected inside the housing. By using the plug-in cylinder and the plug-in part to adjust the gap between the sealing plate and the housing, when the sealing plate and the housing are completely fitted, the entry of outside air can be reduced, the contact between air and molecular sieve can be reduced, and the service life of molecular sieve can be extended.

[0005] This utility model provides the following technical solution: an oxygen generator using an oil-free scroll compressor, comprising a housing and a base, wherein an oxygen generation module, a flow guiding module and a molecular sieve are provided on the base, and an air inlet is provided on the housing, characterized in that: the air inlet includes a sealing plate, a filter screen, a plug-in cylinder and an air inlet louver, the air inlet louver and the plug-in cylinder are both connected to the inner wall of the housing, the filter screen is adhered to the air inlet louver, the sealing plate has a plug-in part formed therein, the plug-in part is inserted into the plug-in cylinder to control the height of the sealing plate, and the air inlet is sealed when the sealing plate is in contact with the housing.

[0006] According to the above technical solution, an outer wall and an inner wall are formed on the top surface of the plug-in cylinder, and a groove is formed between the outer wall and the inner wall. The plug-in part is a ring, and the plug-in part is inserted into the groove. Through the cooperation of the groove and the plug-in part, the plug-in cylinder and the plug-in part are more smoothly connected.

[0007] According to the above technical solution, a sealing strip groove is formed on the surface of the plug part, and a sealing strip is embedded in the sealing strip groove, which improves the sealing between the plug part and the groove. At the same time, the sealing strip increases the friction and prevents the plug part from sliding in the groove.

[0008] According to the above technical solution, a buckle plate is also formed on the surface of the sealing plate, and a slot is provided on the air inlet louver. The slot cooperates with the buckle plate to guide the insertion of the sealing plate, making the insertion of the sealing plate more stable.

[0009] According to the above technical solution, a louvered plate is formed on the air inlet louver, the height of the louvered plate is lower than the end face of the air inlet louver, and the filter screen is set at the upper end of the louvered plate. The air is filtered through the filter screen to prevent impurities in the air from entering the oxygen generator.

[0010] According to the above technical solution, the oxygen generating module is equipped with an oil-free scroll compressor, the oxygen generating module has a top plate formed on it, a fan is fixed at the upper end of the top plate, the air outlet of the fan is connected to the oil-free scroll compressor, and the fan stably introduces air into the oil-free scroll compressor.

[0011] The oil-free scroll compressor includes a rotating disk and a stationary disk with a scroll pattern. There is a gap between the rotating disk and the stationary disk to allow air to pass through. By rotating the rotating disk eccentrically, the gap between the rotating disk and the stationary disk is reduced, thereby compressing the air.

[0012] According to the above technical solution, the oil-free scroll compressor also includes a frame. The upper end of the frame is a moving and stationary disc mounting cavity, and the lower end is a stator and rotor mounting cavity. A stator assembly and a rotor assembly are inserted into the stator and rotor mounting cavity. An end cover is connected to the lower end of the stator and rotor mounting cavity. The output end of the rotor assembly extends into the moving and stationary disc mounting cavity. A balance block is fitted on the upper end of the rotor assembly. The moving disc is connected to the balance block. A cover plate is connected to the upper end of the moving and stationary disc mounting cavity. The stationary disc is fixed on the lower end of the cover plate. The stator assembly and rotor assembly are installed in the stator and rotor mounting cavity through the frame. The moving disc and stationary disc are set in the moving and stationary disc mounting cavity, making the frame closed, which further reduces the noise of the oil-free scroll compressor during operation.

[0013] According to the above technical solution, the flow guiding module includes a solenoid valve. The upper end of the oil-free scroll compressor is connected to the solenoid valve through a pipeline. Both ends of the solenoid valve are connected to molecular sieves. The two molecular sieves are connected to an oxygen storage tank through pipelines. The upper end of the oxygen storage tank is connected to an outlet through a pipeline. A flow solenoid valve is installed on the outlet. The operation of the molecular sieves is controlled by the solenoid valve, and the flow solenoid valve controls the oxygen output.

[0014] According to the above technical solution, the lower end of the oxygen generating module is provided with a base plate, the base plate is provided with an exhaust port, and the lower end of the base is formed with an exhaust channel, the exhaust channel being connected to the exhaust port.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0016] (1) By using an oil-free scroll compressor, the air is compressed by the relative motion of the moving plate and the stationary plate. Compared with the existing piston compressor, the use of lubricating oil is reduced, oil molecules are avoided in the compressed air, and the purity of oxygen is improved. At the same time, the oil-free scroll compressor is quieter than the existing compressor. Oil-free operation reduces maintenance workload and cost, lowers the operating cost of the equipment, reduces the impact of oil pollution on the inside of the equipment, and extends the service life of the equipment.

[0017] (2) The moving plate and stationary plate are placed in the moving and stationary plate mounting cavity of the frame, and the stator assembly and rotor assembly are placed in the stator and rotor mounting cavity, so that the oil-free scroll compressor is in a closed state, which further reduces the generation of noise.

[0018] (3) When the oil-free scroll compressor is running, the moving plate and the stationary plate will not come into contact, which reduces the friction loss of the moving mechanism and improves the energy efficiency of the equipment.

[0019] (4) By setting a plug-in part in the air inlet and connecting a plug-in tube in the housing, the gap between the sealing plate and the housing can be adjusted by using the plug-in tube and the plug-in part to make the plug-in depth. When the sealing plate and the housing are completely fitted, the entry of outside air can be reduced, the contact between air and molecular sieve can be reduced, and the service life of molecular sieve can be extended. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a perspective view of the overall structure of the oxygen generator of this utility model;

[0022] Figure 2This is an exploded view of the air inlet of this utility model;

[0023] Figure 3 This is a structural diagram of the plug-in sleeve of this utility model;

[0024] Figure 4 This is a structural diagram of the sealing part of this utility model;

[0025] Figure 5 This is a structural diagram of the air inlet louver of this utility model;

[0026] Figure 6 This is a cross-sectional view of the air inlet of this utility model;

[0027] Figure 7 This is a schematic diagram of the internal structure of this utility model;

[0028] Figure 8 This is a perspective view of the internal structure of this utility model;

[0029] Figure 9 This is a schematic diagram of the rear of the internal structure of this utility model;

[0030] Figure 10 This is a schematic diagram of the bottom structure of the oxygen generator of this utility model;

[0031] Figure 11 This is a cross-sectional view of the internal moving plate and stationary plate of the oil-free scroll compressor of this utility model;

[0032] Figure 12 This is an exploded view of the oil-free scroll compressor of this utility model;

[0033] In the diagram: 1. Housing; 11. Sealing plate; 111. Buckle plate; 12. Insertion part; 121. Sealing strip groove; 13. Filter screen; 14. Insertion cylinder; 141. Outer wall; 142. Inner wall; 143. Connecting platform; 15. Air inlet louver; 151. Slot; 152. Louver plate; 153. Connecting ear; 16. Connecting column; 2. Base; 21. Exhaust channel; 3. Casters; 4. Oxygen generating module; 41. Oil-free scroll compressor; 4 11. Moving plate; 412. Stationary plate; 4121. Heat sink; 413. Frame; 414. Compressor; 415. Stator assembly; 416. Rotor assembly; 417. End cover; 418. Cover plate; 419. Balance block; 42. Pad block; 43. Base plate; 431. Exhaust port; 44. Top plate; 45. Fan; 5. Flow guide module; 51. Solenoid valve; 6. Molecular sieve; 61. Oxygen storage tank; 7. Air outlet; 71. Flow solenoid valve. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1 , 2 6 and 7, the present invention provides the following technical solution: an oxygen generator using an oil-free scroll compressor, comprising a housing 1 and a base 2, with casters 3 connected to the bottom of the base 2 for easy movement of the oxygen generator; an oxygen generating module 4, a flow guiding module 5, and a molecular sieve 6 are provided on the base 2; the flow guiding module 5 is located above the oxygen generating module 4; the molecular sieve 6 is installed on the base 2 and located inside the flow guiding module 5; an air inlet is provided on the housing 1, the air inlet including a sealing plate 11, a filter screen 13, a plug-in cylinder 14, and an air inlet louver 15; the air inlet louver 15 and the plug-in cylinder 14 are both connected to the inner wall 142 of the housing 1; a connecting platform 143 is formed on the outer surface of the plug-in cylinder 14; a connecting column 16 is formed on the inner wall of the housing 1; the connecting platform 143 and the connecting column 16 are connected to the inner wall of the housing 1. The connecting post 16 is connected by screws. Connecting ears 153 are also formed on the outer surface of the air inlet louver 15. The connecting ears 153 have grooves. The connecting post 16 is inserted into the grooves. The connecting ears 153 and the connecting post are connected together by screws. The filter screen 13 is adhered to the air inlet louver 15 to filter the air entering through the air inlet. The sealing plate 11 has a plug-in part 12 formed on it. The plug-in part 12 is inserted into the plug-in cylinder 14. The height of the sealing plate 11 is controlled by the insertion depth of the plug-in part 12 in the plug-in cylinder 14. When the sealing plate 11 is in contact with the housing 1, the air inlet is completely sealed, so that when the oxygen generator is not working, it can reduce the entry of outside air, reduce the contact between nitrogen in the outside air and the molecular sieve, and extend the service life of the molecular sieve.

[0036] like Figure 3 As shown, an outer wall 141 and an inner wall 142 are formed on the top surface of the plug-in cylinder 14, and a groove is formed between the outer wall 141 and the inner wall 142. The plug-in part 12 is a ring and is inserted into the groove. By inserting the plug-in part 12 into the groove, the connection between the plug-in cylinder 14 and the plug-in part 12 is quick. At the same time, the insertion depth can adjust the gap between the sealing plate 11 and the housing 1, thereby controlling the air inlet.

[0037] A sealing strip groove 121 is provided on the surface of the plug part 12. The sealing strip groove 121 is used to embed the sealing strip. By providing the sealing strip groove 121, the sealing performance between the plug part 12 and the plug tube 14 is further improved. At the same time, the sealing strip can enhance the friction between the plug part 12 and the plug tube 14 and prevent the plug part 12 from sliding inside the plug tube 14.

[0038] like Figure 4 and 5 As shown, a buckle plate 111 is also formed on the surface of the sealing plate 11. A slot 151 is provided on the air inlet louver 15. The slot 151 cooperates with the buckle plate 111. The buckle plate 111 is embedded in the slot 151, which guides the extension and retraction of the buckle plate 111, so that the sealing plate 11 can be inserted stably and smoothly.

[0039] like Figure 6 As shown, a louver plate 152 is formed on the air inlet louver 15. The height of the louver plate 152 is lower than the end face of the air inlet louver 15. The filter screen 13 is set at the upper end of the louver plate 152, so that the filter screen 13 can be fixed inside the air inlet louver 15.

[0040] like Figure 8 As shown, an oil-free scroll compressor 41 is installed inside the oxygen generation module 4. The oil-free scroll compressor 41 is mounted on the pad block 42. A top plate 44 is formed on the oxygen generation module 4. A fan 45 is fixed at the upper end of the top plate 44. The air outlet of the fan 45 is connected to the oil-free scroll compressor 41. Air is introduced into the oil-free scroll compressor 41 through the fan 45, providing a stable air source for the oil-free scroll compressor 41.

[0041] like Figure 11 As shown, the oil-free scroll compressor 41 includes a rotating disk 411 and a stationary disk 412 with a scroll distribution. There is a gap between the rotating disk 411 and the stationary disk 412 for air to pass through. By rotating the rotating disk 411 eccentrically, the gap between the rotating disk 411 and the stationary disk 412 is reduced, and the air is compressed. The compressed air passes through the solenoid valve 51 and enters the molecular sieve 6. The rotating disk 411 and the stationary disk 412 will not touch, which reduces noise. At the same time, compared with the previous compressor, no lubricating oil is used inside, and the oxygen produced has a high degree of cleanliness.

[0042] like Figure 12As shown, the oil-free scroll compressor 41 also includes a frame 413. The upper end of the frame 413 is a mounting cavity for the moving and stationary discs, and the lower end is a mounting cavity for the stator and rotor. A stator assembly 415 and a rotor assembly 416 are inserted into the mounting cavity. The rotor assembly 416 is disposed within the stator assembly 415. An end cover 417 is connected to the lower end of the mounting cavity, sealing the rotor assembly 416 and the stator assembly 415 to the lower end of the frame 413. The output end of the rotor assembly 416 extends into the mounting cavity. A balance block 419 is fitted onto the upper end of the rotor assembly 416. The moving disc 411 is connected to the balance block 419. The balance block 419 rotates eccentrically, causing the moving disc 411 to also wobble eccentrically. A cover plate 418 is connected to the upper end of the mounting cavity. The plate 412 is fixed to the lower end of the cover plate 418. The stator assembly 415 and the rotor assembly 416 are installed in the stator and rotor mounting cavity through the frame 413. The moving plate 411 and the stationary plate 412 are set in the moving and stationary plate mounting cavity, so that the frame 413 is in a closed state, which further reduces the noise of the oil-free scroll compressor 41 during operation. At the same time, a compressor fan 414 is installed on the side of the frame 413. The compressor fan 414 draws the outside air into the compressor, ensuring a stable air input. The back of the stationary plate 412 is formed with heat sink 4121. The heat sink 4121 improves the heat dissipation efficiency, reduces the heat generated by compressed air in the oil-free scroll compressor 41, and ensures the normal operation of the oil-free scroll compressor 41.

[0043] like Figure 8 , 9 As shown in Figure 10, the flow guiding module 5 includes a solenoid valve 51. The upper end of the oil-free scroll compressor 41 is connected to the solenoid valve 51 through a pipeline. Both ends of the solenoid valve 51 are connected to molecular sieves 6. The two molecular sieves 6 are connected to the oxygen storage tank 61 through pipelines. The upper end of the oxygen storage tank 61 is connected to the outlet 7 through a pipeline. A flow solenoid valve 71 is installed on the outlet 7. By switching the solenoid valve 51, the on / off of the molecular sieves 6 and the oil-free scroll compressor 41 is controlled, so that the molecular sieves 6 can operate independently. The molecular sieves 6 adsorb nitrogen in the air, and oxygen is introduced into the oxygen storage tank 61. The oxygen storage tank 61 delivers oxygen to the outlet 7. The flow solenoid valve 71 on the outlet 7 controls the output flow of oxygen. The two molecular sieves 6 operate independently. When one molecular sieve 6 is adsorbing nitrogen in the air, the other molecular sieve 6 will release the previously adsorbed nitrogen through the solenoid valve 51. The released nitrogen is discharged from the bottom of the oxygen generator.

[0044] like Figure 10 As shown, the lower end of the oxygen generating module 4 is provided with a base plate 43, and an exhaust port 431 is provided on the base plate 43. The lower end of the base 2 is formed with an exhaust channel 21, which is connected to the exhaust port 431. Nitrogen gas is introduced into the exhaust channel 21 through the exhaust port 431 and discharged outward from the exhaust channel 21.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. An oxygen generator employing an oil-free scroll compressor, comprising a housing and a base, wherein an oxygen generation module, a flow guiding module, and a molecular sieve are disposed on the base, and an air inlet is provided on the housing, characterized in that: The air inlet includes a sealing plate, a filter screen, a plug-in cylinder, and an air inlet louver. The air inlet louver and the plug-in cylinder are both connected to the inner wall of the housing. The filter screen is adhered to the air inlet louver. The sealing plate has a plug-in part formed therein, which is inserted into the plug-in cylinder to control the height of the sealing plate. When the sealing plate is in contact with the housing, the air inlet is sealed.

2. An oxygen generator employing an oil-free scroll compressor according to claim 1, characterized in that: The top surface of the plug-in cylinder is formed with an outer wall and an inner wall, and a groove is formed between the outer wall and the inner wall. The plug-in part is a ring and is inserted into the groove.

3. An oxygen generator employing an oil-free scroll compressor according to claim 2, characterized in that: A sealing strip groove is formed on the surface of the insertion part, and a sealing strip is embedded in the sealing strip groove.

4. An oxygen generator employing an oil-free scroll compressor according to claim 1, characterized in that: The sealing plate is also formed with a buckle plate, and the air inlet louver is provided with a slot, which cooperates with the buckle plate.

5. An oxygen generator employing an oil-free scroll compressor according to claim 4, characterized in that: The air inlet louver has a louvered plate formed on it, the height of which is lower than the end face of the air inlet louver, and the filter screen is disposed on the upper end of the louvered plate.

6. An oxygen generator employing an oil-free scroll compressor according to claim 1, characterized in that: The oxygen generating module is equipped with an oil-free scroll compressor. A top plate is formed on the oxygen generating module, and a fan is fixed at the upper end of the top plate. The air outlet of the fan is connected to the oil-free scroll compressor.

7. An oxygen generator employing an oil-free scroll compressor according to claim 6, characterized in that: The oil-free scroll compressor includes a rotating disk and a stationary disk with a scroll pattern. There is a gap between the rotating disk and the stationary disk to allow air to pass through. By rotating the rotating disk eccentrically, the gap between the rotating disk and the stationary disk is reduced, thereby compressing the air.

8. An oxygen generator employing an oil-free scroll compressor according to claim 7, characterized in that: The oil-free scroll compressor also includes a frame, the upper end of which is a moving and stationary disc mounting cavity, and the lower end of which is a stator and rotor mounting cavity. A stator assembly and a rotor assembly are inserted into the stator and rotor mounting cavity. An end cover is connected to the lower end of the stator and rotor mounting cavity. The output end of the rotor assembly extends into the moving and stationary disc mounting cavity. A balance block is fitted on the upper end of the rotor assembly. The moving disc is connected to the balance block. A cover plate is connected to the upper end of the moving and stationary disc mounting cavity. The stationary disc is fixed on the lower end of the cover plate.

9. An oxygen generator employing an oil-free scroll compressor according to claim 1, characterized in that: The flow guiding module includes a solenoid valve. The upper end of the oil-free scroll compressor is connected to the solenoid valve through a pipeline. Both ends of the solenoid valve are connected to molecular sieves. The two molecular sieves are connected to an oxygen storage tank through pipelines. The upper end of the oxygen storage tank is connected to an air outlet through a pipeline. A flow solenoid valve is installed on the air outlet.

10. An oxygen generator employing an oil-free scroll compressor according to claim 1, characterized in that: The oxygen generating module has a base plate at its lower end, and an exhaust port is provided on the base plate. An exhaust channel is formed at the lower end of the base, and the exhaust channel is connected to the exhaust port.

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