Oxygen production device with replaceable drying cylinder

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to an oxygen generating device with a replaceable drying cylinder, which comprises a compressor, a three-way valve, a drying cylinder and a molecular sieve cylinder, an air inlet of the three-way valve communicates with an air outlet of the compressor, an air outlet of the three-way valve communicates with an air inlet of the drying cylinder, and a nitrogen discharging opening of the three-way valve communicates with external space. The air outlet of the drying cylinder is communicated with the air inlet of the molecular sieve cylinder; the drying cylinder comprises a cylinder body and a drying agent in the cylinder body, one end of the cylinder body is an air inlet, and the other end is an air outlet; and gas enters the drying agent from the gas inlet, is discharged from the gas outlet and enters the molecular sieve cylinder. The replaceable drying cylinder is small in size and low in cost; and the drying cylinder has the function of reducing noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an oxygen production device with a replaceable drying cylinder. Background Art

[0002] The existing oxygen generator desiccant is filled in the molecular tower, or a part of the molecular sieve is used as the desiccant. After running continuously for a certain period of time in a high humidity environment, the oxygen production efficiency decreases. The desiccant cannot be replaced separately. When replacing, the molecular sieve cylinder must be replaced as a whole or all molecular sieves must be replaced, which results in high user costs. In addition, when the airflow passes through the molecular sieve cylinder, it will generate a lot of noise, affecting the use effect. Utility Model Content

[0003] The purpose of the utility model is to provide an oxygen production device with a replaceable drying cartridge. By adding the replaceable drying cartridge between the three-way valve module and the molecular sieve cartridge, after a certain period of use, only the replaceable drying cartridge needs to be replaced, thereby effectively reducing the cost of equipment use.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An oxygen production device with a replaceable drying cartridge, the oxygen production device comprising a compressor, a three-way valve, a drying cartridge and a molecular sieve cartridge;

[0006] The air inlet of the three-way valve is connected to the air outlet of the compressor, the air outlet of the three-way valve is connected to the air inlet of the drying cylinder, and the nitrogen exhaust port of the three-way valve is connected to the external space;

[0007] The air outlet of the drying cylinder is connected to the air inlet of the molecular sieve cylinder;

[0008] The drying cylinder comprises a cylinder body and a desiccant in the cylinder body, one end of the cylinder body is an air inlet, and the other end is an air outlet; the gas enters the desiccant from the air inlet, and then is discharged from the air outlet and enters the molecular sieve cylinder.

[0009] Preferably, the three-way valve, the drying cartridge and the molecular sieve cartridge are connected in sequence to form a gas circuit, and the oxygen production device includes two parallel gas circuits.

[0010] Preferably, the oxygen production device comprises a base and an outer shell, the compressor, the drying cylinder and the molecular sieve cylinder are arranged on the base, and the outer shell cover is arranged on the base to encapsulate the compressor, the drying cylinder and the molecular sieve cylinder in the outer shell.

[0011] Preferably, a compressor mounting groove, a drying cylinder mounting groove and a molecular sieve cylinder mounting groove are provided on the base; the compressor is arranged in the compressor mounting groove, the drying cylinder is arranged in the drying cylinder mounting groove, and the molecular sieve cylinder is arranged in the molecular sieve cylinder mounting groove.

[0012] Preferably, the three-way valve is a two-position three-way valve. The three-way valve can also be other valves, as long as it can be provided with three gas ports, such as an air inlet, an air outlet and a nitrogen exhaust port, and the nitrogen exhaust port can be used as a gas outlet when the oxygen generator exhausts nitrogen.

[0013] Preferably, the drying cylinder further comprises a microporous air pipe, which is arranged in the desiccant, and the gas enters the desiccant from the air inlet, then enters the microporous air pipe, and finally is discharged from the air outlet and enters the molecular sieve cylinder.

[0014] The utility model adds a replaceable drying cylinder or a drying cylinder with a noise reduction structure between the two-position three-way valve module or the two-position four-way valve module and the molecular sieve cylinder. During maintenance, only the drying cylinder needs to be replaced. The cost of the drying cylinder is low, which effectively reduces the customer's use cost and reduces the airflow noise of the drying cylinder.

[0015] The structural arrangement of the utility model enables the oxygen production device to dry and recycle the hygroscopic desiccant when discharging nitrogen, and at the same time, the drying cylinder can be replaced more conveniently when it cannot be recycled; the replaceable drying cylinder is small in size and low in cost; and the drying cylinder has the function of reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the gas circuit structure of the oxygen production device of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the oxygen production device of the utility model after removing the outer shell;

[0018] Figure 3 It is a structural schematic diagram of the base and the drying cylinder of the utility model;

[0019] Figure 4 It is a cross-sectional view of the drying cylinder of the utility model;

[0020] Figure 5 It is a cross-sectional view of the noise reduction drying cylinder of the utility model;

[0021] Reference numerals:

[0022] 200, two-position three-way valve module; 210, two-position three-way valve A; 220, two-position three-way valve B; 310, drying cylinder A; 320, drying cylinder B; 301, air inlet; 302, cylinder body; 303, desiccant; 304, microporous air pipe; 305, air outlet; 311, mounting slot of drying cylinder A; 221, mounting slot of drying cylinder B; 410, molecular sieve cylinder A; 411, mounting slot of molecular sieve cylinder A; 420, molecular sieve cylinder B; 421, mounting slot of molecular sieve cylinder B; 510, compressor; 511, mounting slot of compressor; 600, base. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] like Figure 1 As shown, an oxygen production device with a replaceable drying cartridge, the oxygen production device comprises a compressor 510, a two-position three-way valve module 200, a drying cartridge and a molecular sieve cartridge;

[0026] The two-position three-way valve module 200 includes a two-position three-way valve A210 and a two-position three-way valve B220; the drying cartridge includes a drying cartridge A310 and a drying cartridge B320; the molecular sieve cartridge includes a molecular sieve cartridge A410 and a molecular sieve cartridge B420;

[0027] The air inlet of the two-position three-way valve of the two-position three-way valve module 200 is connected to the air outlet of the compressor, the air outlet of the three-way valve is connected to the air inlet of the drying cylinder, and the nitrogen exhaust port of the three-way valve is connected to the external space;

[0028] The air outlet of the drying cylinder is connected to the air inlet of the molecular sieve cylinder;

[0029] The drying cylinder comprises a cylinder body and a desiccant in the cylinder body, one end of the cylinder body is an air inlet, and the other end is an air outlet; the gas enters the desiccant from the air inlet, and then is discharged from the air outlet and enters the molecular sieve cylinder.

[0030] like Figure 4 As shown, the drying cylinder includes a cylinder body 302 and a desiccant 303 , one end of the cylinder body 302 is an air inlet 301 , and the other end is an air outlet 305 ; gas enters the desiccant 303 from the air inlet 301 and is discharged from the air outlet 305 .

[0031] like Figure 2-3 As shown, the oxygen production device includes a base 600 and a shell (the structure of the shell is not shown in the figure), the compressor 510 and the oxygen production circuit are arranged on the base 600, and the shell cover is arranged on the base 600 to encapsulate the compressor 510 and the oxygen production circuit in the shell.

[0032] The base 600 is provided with a compressor mounting groove 511, a drying cylinder mounting groove (respectively, a drying cylinder A mounting groove 311 and a drying cylinder B mounting groove 321) and a molecular sieve cylinder mounting groove (respectively, a molecular sieve cylinder A mounting groove 411 and a molecular sieve cylinder B mounting groove 421); the compressor 510 is arranged in the compressor mounting groove 511, the drying cylinders are arranged in the drying cylinder mounting grooves in a one-to-one correspondence, and the molecular sieve cylinders are arranged in the molecular sieve cylinder mounting grooves in a one-to-one correspondence.

[0033] Replacement of drying cylinder: loosen screw 322, pull out drying cylinder A 310 or drying cylinder B 320 from base 600, replace with a new drying cylinder, and tighten screw 322, then the machine can work normally. The utility model fixes the drying cylinder by screws and slots, which makes replacement of the drying cylinder more convenient.

[0034] Oxygen production process of oxygen concentrator:

[0035] like Figure 1 As shown, after being compressed by the compressor 510, the air enters the replaceable drying cylinder A 310 through the two-position three-way valve A 210, and the dry air enters the molecular sieve cylinder A 410 through the drying cylinder, and the water vapor remains on the desiccant of the drying cylinder; after the air passes through the molecular sieve cylinder, the oxygen enters the oxygen storage tank, and the oxygen storage tank is connected to the oxygen outlet through the oxygen outlet valve; when discharging nitrogen, the nitrogen passes through the drying cylinder and is discharged into the air through the nitrogen outlet of the two-position three-way valve module 200. When the nitrogen passes through the drying cylinder, the water vapor is taken out together and discharged into the air, so as to prepare for the next compression and oxygenation.

[0036] When the molecular sieve cylinder A 410 discharges nitrogen, the nitrogen passes through the drying cylinder A 310 and is discharged into the air through the nitrogen discharge port of the two-position three-way valve module 200. When the nitrogen passes through the drying cylinder, it takes out the water vapor and discharges it into the air.

[0037] At this time, the air continues to be compressed by the compressor 510, and then enters the replaceable drying cylinder B320 through the two-position three-way valve B220. The dry air enters the molecular sieve cylinder B420 through the drying cylinder, and the water vapor remains on the desiccant of the drying cylinder B320; after the air passes through the molecular sieve cylinder B420, the oxygen enters the oxygen storage tank; the nitrogen passes through the drying cylinder B320 and is discharged into the air through the nitrogen exhaust port of the two-position three-way valve module. When the nitrogen passes through the drying cylinder B320, it takes out the water vapor and discharges it into the air, and the operation is repeated alternately.

[0038] like Figure 4 In the drying cylinder structure shown, air enters the drying cylinder from the air inlet 301 after passing through the two-position three-way valve module, 302 is a closed cylinder, 303 is a desiccant (the desiccant can be a molecular sieve or activated alumina), and enters the molecular sieve cylinder from the air outlet 305, and water vapor is adsorbed on the desiccant; when nitrogen is discharged, nitrogen enters the drying cylinder from the air outlet 305, enters the two-position three-way valve module from the air inlet 301 together with water vapor, and is discharged from the nitrogen discharge port.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that a microporous air pipe 304 is provided in the drying cylinder of this embodiment. Figure 5As shown, the drying cylinder includes a cylinder body 302 and a microporous air pipe 304 and a desiccant 303 in the cylinder body 302 . One end of the cylinder body 302 is an air inlet 301 , and the other end is an air outlet 305 . The microporous air pipe 304 is arranged in the desiccant 303 .

[0041] The oxygen production process of the oxygen concentrator is the same as that in Example 1.

[0042] like Figure 5 In the drying cylinder structure shown, air enters the drying cylinder from the air inlet 301 after passing through the two-position three-way valve module, 302 is a sealed cylinder, 303 is a desiccant (the desiccant can be a molecular sieve or activated alumina), 304 is a microporous air pipe, and the gas enters the desiccant 303 from the air inlet 301, and then enters the molecular sieve cylinder from the air outlet 305 through the microporous air pipe 304, and the water vapor is adsorbed on the desiccant; when nitrogen is discharged, nitrogen enters the drying cylinder from the air outlet 305, and enters the two-position three-way valve module from the air inlet 301 together with the water vapor, and is discharged from the nitrogen discharge port. The microporous air pipe 304 reduces the noise of the passing airflow, so that the replaceable desiccant can remove the water vapor in the air and reduce the noise generated by the passing gas.

[0043] Any content not described in detail in the present invention can be based on the conventional technical knowledge in the field.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the utility model does not deviate from the spirit and scope of the technical solution of the utility model, and should be included in the scope of the claims of the utility model.

Claims

1. An oxygen generator with a replaceable drying cylinder, characterized in that: The oxygen production device comprises a compressor, a three-way valve, a drying cylinder and a molecular sieve cylinder; The air inlet of the three-way valve is connected to the air outlet of the compressor, the air outlet of the three-way valve is connected to the air inlet of the drying cylinder, and the nitrogen exhaust port of the three-way valve is connected to the external space; The air outlet of the drying cylinder is connected to the air inlet of the molecular sieve cylinder; The drying cylinder comprises a cylinder body and a desiccant in the cylinder body, one end of the cylinder body is an air inlet, and the other end is an air outlet; the gas enters the desiccant from the air inlet, and then is discharged from the air outlet and enters the molecular sieve cylinder.

2. The oxygen generator with a replaceable drying cartridge according to claim 1, characterized in that: The three-way valve, the drying cylinder and the molecular sieve cylinder are connected in sequence to form a gas circuit, and the oxygen production device includes two parallel gas circuits.

3. The oxygen generator with a replaceable drying cartridge according to claim 1, characterized in that: The oxygen production device comprises a base and an outer shell. The compressor, the drying cylinder and the molecular sieve cylinder are arranged on the base. The outer shell cover is arranged on the base to encapsulate the compressor, the drying cylinder and the molecular sieve cylinder in the outer shell.

4. The oxygen generator with replaceable drying cartridge according to claim 3, characterized in that: The base is provided with a compressor mounting groove, a drying cylinder mounting groove and a molecular sieve cylinder mounting groove; the compressor is arranged in the compressor mounting groove, the drying cylinder is arranged in the drying cylinder mounting groove, and the molecular sieve cylinder is arranged in the molecular sieve cylinder mounting groove.

5. The oxygen generator with replaceable drying cartridge according to claim 1, characterized in that: The three-way valve is a two-position three-way valve.

6. The oxygen generator with replaceable drying cartridge according to claim 1, characterized in that: The drying cylinder also includes a microporous air pipe, which is arranged in the desiccant. The gas enters the desiccant from the air inlet, then enters the microporous air pipe, and finally is discharged from the air outlet and enters the molecular sieve cylinder.

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