CN113060705A

CN113060705A - Portable oxygenerator of VPSA technique

Info

Publication number: CN113060705A
Application number: CN202110401210.1A
Authority: CN
Inventors: 郭本胜; 李昌才
Original assignee: Hefei Kangjuren Intelligent Technology Co ltd
Current assignee: Hefei Kangjuren Medical Device Technology Co.,Ltd.
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-07-02
Anticipated expiration: 2041-04-14
Also published as: CN113060705B

Abstract

The invention discloses a portable oxygen generator adopting VPSA technology, which comprises a generator body, a vacuum compressor unit and six molecular sieve adsorption towers, wherein each of the six molecular sieve adsorption towers comprises a rotating motor, a rotating valve structure body and a six-cylinder tower body, the vacuum compressor unit consists of an upper cylinder and a lower cylinder, the upper cylinder supplies air to the six molecular sieve adsorption towers through positive pressure, and the lower cylinder is used for extracting nitrogen from the rotating valve structure body through negative pressure. The invention adopts the design of a vacuum compressor unit, the vacuum compressor unit is composed of an upper cylinder and a lower cylinder, wherein the upper cylinder supplies air to a six-tower molecular sieve adsorption tower by positive pressure, the lower cylinder is used for pumping air by negative pressure and can pump nitrogen out, and meanwhile, according to the characteristics of high-pressure adsorption and low-pressure desorption of the molecular sieve, the negative pressure of the lower cylinder ensures that the molecular sieve is regenerated more thoroughly.

Description

Portable oxygenerator of VPSA technique

Technical Field

The invention relates to the technical field of oxygen generators, in particular to a portable oxygen generator adopting VPSA technology.

Background

PSA is a new gas separation technology, taking adsorbent molecular sieve as an example, and the principle is to separate gas mixture by utilizing the difference of adsorption performance of molecular sieve to different gas molecules. The method takes air as a raw material, and separates nitrogen and oxygen in the air by utilizing the selective adsorption performance of a high-efficiency and high-selectivity solid adsorbent on the nitrogen and the oxygen. The separation effect of the carbon molecular sieve on nitrogen and oxygen is mainly based on the fact that the diffusion rates of the two gases on the surface of the carbon molecular sieve are different, and the gas oxygen with the smaller diameter diffuses faster and more enters the solid phase of the molecular sieve. In this way, a nitrogen-enriched fraction is obtained in the gas phase. After a period of time, the adsorption of the molecular sieve to oxygen reaches equilibrium, and according to the characteristic that the carbon molecular sieve adsorbs different gases under different pressures, the pressure is reduced to enable the carbon molecular sieve to remove the adsorption of oxygen, and the process is called regeneration. Pressure swing adsorption processes typically employ two columns in parallel, with alternating pressure adsorption and decompression regeneration to obtain a continuous nitrogen stream.

However, in the prior art, the pressure equalizing holes are often adopted for normal pressure desorption or low pressure desorption, but during desorption in this way, the problems of insufficient and incomplete molecular sieve desorption often exist, so that the recycling effect of the molecular sieve is poor, and oxygen with higher purity cannot be prepared in a recycling manner.

Disclosure of Invention

The invention aims to solve the problems and provides a portable oxygen generator based on VPSA technology.

In order to achieve the purpose, the invention adopts the following technical scheme:

a portable oxygen generator adopting VPSA technology comprises a generator body, a vacuum compressor unit and six-tower molecular sieve adsorption towers, wherein each six-tower molecular sieve adsorption tower comprises a rotating motor, a rotary valve structure body and a six-cylinder tower body;

the vacuum compressor unit consists of an upper cylinder and a lower cylinder, wherein the upper cylinder supplies air to the six-tower molecular sieve adsorption tower under positive pressure, and the lower cylinder is used for extracting nitrogen from the rotary valve structure under negative pressure;

the six-cylinder tower body consists of a molecular sieve cylinder and an oxygen cylinder; the device comprises a rotary valve structure body, a molecular sieve cylinder, a rotary valve structure body, a rotary valve, a;

both ends of the molecular sieve cylinder are provided with port sieve plates;

the oxygen cylinder is fixedly connected to one end of the molecular sieve cylinder, and a three-way pipe is arranged at the upper end of the oxygen cylinder.

Optionally, the port sieve plate is composed of a molecular sieve pressing plate, a molecular sieve felt and a molecular sieve plate, the molecular sieve pressing plate is of an annular structure, the molecular sieve felt and the molecular sieve plate are of disc-shaped structures, the molecular sieve pressing plate and the molecular sieve felt are provided with jacks, and the molecular sieve plate is provided with bolts matched with the jacks for use.

Optionally, the number of the first pipeline and the second pipeline is six, and the second pipeline is located in the middle of the molecular sieve cylinder.

Optionally, the bottom end of the second conduit is bent 90 °.

Optionally, the bottom end of the molecular sieve cylinder is communicated with a bent pipe, the bent pipe is bent by 90 degrees, and two ends of the bent pipe are respectively communicated with the molecular sieve cylinder and the second pipeline.

Optionally, six cavities are formed in the bottom end of the molecular sieve cylinder, the upper end of each cavity is communicated with the molecular sieve cylinder, and the bottom end of each cavity is communicated with the second pipeline.

The invention has the following advantages:

the invention adopts the design of a vacuum compressor unit, the vacuum compressor unit is composed of an upper cylinder and a lower cylinder, wherein the upper cylinder supplies air to a six-tower molecular sieve adsorption tower by positive pressure, the lower cylinder is used for pumping air by negative pressure and can pump nitrogen out, and meanwhile, according to the characteristics of high-pressure adsorption and low-pressure desorption of the molecular sieve, the negative pressure of the lower cylinder ensures that the molecular sieve is regenerated more thoroughly.

Drawings

FIG. 1 is an external view of the structure of the present invention;

FIG. 2 is an overall cross-sectional view of the present invention;

FIG. 3 is a schematic view of the exterior of a six-column molecular sieve adsorption column of the present invention;

FIG. 4 is a schematic view of a molecular sieve tank and an oxygen tank according to the present invention;

FIG. 5 is an exploded view of a port screen panel according to the present invention;

FIG. 6 is a cross-sectional view of an embodiment of a six column molecular sieve adsorption column of the present invention;

FIG. 7 is a second cross-sectional view of an embodiment of a six-column molecular sieve adsorption column of the present invention.

In the figure: the device comprises a machine body 1, a vacuum compressor unit 2, an upper cylinder 21, a lower cylinder 22, a molecular sieve adsorption tower 3 with six towers, a rotating motor 31, a rotary valve structure 32, a tower body 33 with six cylinders, a molecular sieve cylinder 331, an oxygen cylinder 332, a first pipeline 34, a second pipeline 35, a three-way pipe 36, a bent pipe 37, a cavity 38, a sieve plate 39 with ports, a molecular sieve pressing plate 391, a molecular sieve felt 392 and a molecular sieve plate 393.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1-6, a portable oxygen generator of VPSA technology comprises a machine body 1, a vacuum compressor unit 2 and six molecular sieve adsorption towers 3, wherein the six molecular sieve adsorption towers 3 comprise a rotating motor 31, a rotary valve structure 32 and a six-cylinder tower body 33.

The vacuum compressor unit 2 is composed of an upper cylinder 21 and a lower cylinder 22, wherein the upper cylinder 21 supplies air to the six-tower molecular sieve adsorption tower 3 under positive pressure, the lower cylinder 22 is used for pumping out nitrogen of the rotary valve structure 32 under negative pressure, the nitrogen can be pumped out, and meanwhile, according to the characteristics of high-pressure adsorption and low-pressure desorption of the molecular sieve, the molecular sieve in the molecular sieve cylinder 331 is more thoroughly regenerated by the negative pressure of the lower cylinder 5, and the cyclic use is more convenient.

The six-cylinder tower body 33 is composed of two parts, namely a molecular sieve cylinder 331 and an oxygen cylinder 332, the number of the molecular sieve cylinders 331 is six, the molecular sieve cylinders 331 are arranged annularly, the upper ends of the molecular sieve cylinders 331 are communicated with a first pipeline 34 which is vertically arranged, the molecular sieve cylinders 331 are communicated with a rotary valve structure body 32 through the first pipeline 34, and the first pipeline 34 is used for inputting and outputting nitrogen.

The bottom end of the molecular sieve cylinder 331 is communicated with a second pipeline 35 which is vertically arranged, the bottom end of the molecular sieve cylinder 331 is communicated with the rotary valve structure 32 through the second pipeline 35, and the second pipeline 35 is used for outputting oxygen.

Both ends of the molecular sieve cylinder 331 are provided with port sieve plates 39, each port sieve plate 39 is composed of a molecular sieve pressing plate 391, a molecular sieve felt 392 and a molecular sieve plate 393, each molecular sieve pressing plate 391 adopts an annular structure, each molecular sieve felt 392 and each molecular sieve plate 393 adopt a disc-shaped structure, jacks are formed in the molecular sieve pressing plates 391 and the molecular sieve felts 392, pins matched with the jacks are arranged on the molecular sieve plates 393, and the three positioning is realized through the pins and the jacks. The port screen 30 may be secured to the end of the molecular sieve cylinder 331 by a spring.

The oxygen cylinder 332 is fixedly connected to one end of the molecular sieve cylinder 331, the three-way pipe 36 is arranged at the upper end of the oxygen cylinder 332, and the three-way pipe 36 is convenient for sucking and outputting oxygen or realizes synchronous operation of the two.

The number of the first and

second pipes

34 and 35 is six, and the second pipe 35 is located at the middle of the molecular sieve cylinder 331. The six first and

second pipes

34 and 35 correspond to the number of the six-cylinder tower bodies 33.

The bottom end of the second pipe 35 is bent by 90 deg., as shown in fig. 4, and the bent second pipe 35 is easy to install.

Referring to fig. 4, in this embodiment, the bottom end of the molecular sieve cylinder 331 is communicated with the through-bent pipe 37, the through-bent pipe 37 is bent by 90 °, two ends of the through-bent pipe 37 are respectively communicated with the molecular sieve cylinder 331 and the second pipeline 35, the through-bent pipe 37 facilitates the detachment and connection of the two, and the through-bent pipe 37 is replaced, but the three-way pipe increases the overall length of the machine body 1.

Example two

Referring to fig. 7, the present embodiment is different from the first embodiment in that the through-bending pipe 37 is replaced by a cavity 38, which is specifically as follows:

six cavities 38 are formed in the bottom end of the molecular sieve cylinder 331, the upper end of each cavity 38 is communicated with the molecular sieve cylinder 331, the bottom end of each cavity 38 is communicated with the second pipeline 35, the second pipeline 35 can be conveniently and directly inserted into the cavities 38, and therefore the length of the machine body 1 is reduced.

The above description is only a preferred embodiment of the present invention, and not intended to be exhaustive or to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention. In the present invention, unless otherwise specifically stated or limited, the terms "cover", "fitted", "attached", "fixed", "distributed", and the like are to be understood in a broad sense, and may be, for example, fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Claims

1. The utility model provides a portable oxygenerator of VPSA technique, includes organism (1), vacuum compressor group (2) and six tower molecular sieve adsorption towers (3), six tower molecular sieve adsorption towers (3) include rotating electrical machines (31), rotary valve structure body (32) and six jar tower bodies (33), its characterized in that:

the vacuum compressor unit (2) is composed of an upper cylinder (21) and a lower cylinder (22), wherein the upper cylinder (21) supplies air to the six-tower molecular sieve adsorption tower (3) under positive pressure, and the lower cylinder (22) is used for extracting nitrogen from the rotary valve structure body (32) under negative pressure;

the six-cylinder tower body (33) is composed of a molecular sieve cylinder (331) and an oxygen cylinder (332); the number of the molecular sieve cylinders (331) is six, the molecular sieve cylinders are arranged annularly, the upper ends of the molecular sieve cylinders (331) are communicated with first pipelines (34) which are vertically arranged, the molecular sieve cylinders (331) are communicated with a rotary valve structure body (32) through the first pipelines (34), the bottom ends of the molecular sieve cylinders (331) are communicated with second pipelines (35) which are vertically arranged, and the bottom ends of the molecular sieve cylinders (331) are communicated with the rotary valve structure body (32) through the second pipelines (35);

both ends of the molecular sieve cylinder (331) are provided with port sieve plates (39);

the oxygen cylinder (332) is fixedly connected to one end of the molecular sieve cylinder (331), and a three-way pipe (36) is arranged at the upper end of the oxygen cylinder (332).

2. The portable oxygen generator adopting VPSA technology according to claim 1, wherein the port sieve plate (39) is composed of a molecular sieve pressing plate (391), a molecular sieve felt (392) and a molecular sieve plate (393), the molecular sieve pressing plate (391) adopts an annular structure, the molecular sieve felt (392) and the molecular sieve plate (393) both adopt a disc-shaped structure, the molecular sieve pressing plate (391) and the molecular sieve felt (392) are both provided with jacks, and the molecular sieve plate (393) is provided with pins used in cooperation with the jacks.

3. A VPSA portable oxygen generator according to claim 1, wherein the number of said first and second pipes (34, 35) is six, and said second pipe (35) is located in the middle of the molecular sieve cylinder (331).

4. A VPSA portable oxygen generator according to claim 3, characterized in that the bottom end of the second pipe (35) is bent 90 °.

5. A VPSA portable oxygen generator as claimed in claim 3, wherein the bottom of the molecular sieve cylinder (331) is connected to a through pipe (37), the through pipe (37) is bent 90 °, and the two ends of the through pipe (37) are connected to the molecular sieve cylinder (331) and the second pipe (35) respectively.

6. A VPSA portable oxygen generator according to claim 3, wherein six cavities (38) are opened at the bottom of the molecular sieve cylinder (331), the upper ends of the cavities (38) are connected to the molecular sieve cylinder (331), and the bottom ends of the cavities (38) are connected to the second pipe (35).