Portable nitrogen making machine

Abstract

The utility model relates to a portable nitrogen making machine which comprises a control panel, a movable base, a case and a nitrogen making device, the nitrogen making device comprises an activated carbon canister, an adsorption tank group, a buffer tank, an adsorption tank gas inlet pipeline, an adsorption tank gas inlet control valve, an adsorption tank gas outlet pipeline, an adsorption tank gas outlet control valve, an emptying pipeline and an emptying control valve; the case comprises an upper side plate, a peripheral side plate and a fixing ring, a case door capable of being opened or closed is arranged on the peripheral side plate, and the fixing ring comprises a first arc-shaped clamping body and a second arc-shaped clamping body which are detachably matched together and arranged on the outer side of the tank corresponding to the fixing ring in a sleeving mode. The balancing pipelines are arranged among the plurality of adsorption tanks, so that the adsorption tanks can more sufficiently adsorb gas, the speed of the gas passing through the adsorption tanks is more uniform, and the speed of nitrogen entering the buffer tank is more stable; due to the design of the detachable fixing ring and the box door, tank bodies such as the adsorption tank and the like can be conveniently maintained, and the manufacturing cost of the small nitrogen making machine is greatly reduced due to the simple and modularized structural design.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen generators, in particular to a portable nitrogen generator. Background Art

[0002] In the industrial field, nitrogen is a widely used process gas, commonly used in food and beverage, metal processing, electronics, chemical and pharmaceutical industries. The nitrogen generator uses air as raw material and uses physical methods to separate oxygen and nitrogen to obtain nitrogen.

[0003] At present, the main methods for nitrogen production include molecular sieve air separation, cryogenic air separation and membrane air separation. The most commonly used is molecular sieve air separation, which uses the principle of pressure swing adsorption to separate air at room temperature to produce high-purity nitrogen. Generally, two adsorption tanks are connected in parallel, and controlled by PLC and pneumatic valves or solenoid valves, and alternately pressurized adsorption and decompression regeneration are performed to complete oxygen and nitrogen separation to obtain nitrogen with higher purity. With the changes in customer usage sites and the increase in required purity requirements, the demand for portable small-scale high-purity nitrogen production equipment is increasing. Utility Model Content

[0004] The utility model aims to provide a novel portable nitrogen generator.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A portable nitrogen generator, comprising a movable base, a chassis mounted on the base and a nitrogen generator located in the chassis, wherein the nitrogen generator comprises an activated carbon tank, an adsorption tank group, a buffer tank, an adsorption tank air inlet pipe for connecting the activated carbon tank with the adsorption tank group, an adsorption tank air inlet control valve mounted on the adsorption tank air inlet pipe, an adsorption tank air outlet pipe for connecting the buffer tank with the adsorption tank group, an adsorption tank air outlet control valve mounted on the adsorption tank air outlet pipe, an emptying pipe connected to an emptying port of the adsorption tank group and an emptying control valve mounted on the emptying pipe, wherein the adsorption tank group comprises a plurality of adsorption tanks connected in parallel, the plurality of adsorption tanks are connected through a balancing pipe, and a balancing control valve is mounted on the balancing pipe;

[0007] The chassis comprises an upper side plate, a peripheral side plate arranged between the upper side plate and the base, and a fixing ring fixedly mounted on the inner side wall of the chassis, and a push handle is mounted on the upper side plate; a box door that can be opened or closed is provided on at least one side of the front, back, left and right sides of the peripheral side plate and at most three sides, and an air inlet connected to the activated carbon canister and an air outlet connected to the buffer tank are provided on any side of the chassis that does not have a box door; the fixing ring has a plurality of parts that correspond to and match the activated carbon canister, adsorption tank and buffer tank one by one, and the fixing ring comprises a first arc-shaped clamping body and a second arc-shaped clamping body, and the first arc-shaped clamping body and the second arc-shaped clamping body are detachably matched together and clamped on the outside of the tank corresponding thereto and located in the middle and upper part of the tank;

[0008] The portable nitrogen generator further comprises a control panel mounted on the chassis, and controlled by the control panel, the adsorption tank air inlet control valve, the adsorption tank air outlet control valve, the exhaust control valve and the balance control valve can be opened or closed.

[0009] Preferably, the equalizing pipeline includes a first equalizing pipeline and a second equalizing pipeline, the first equalizing pipeline is connected between the air inlets of multiple adsorption tanks and communicated with the adsorption tank air inlet pipeline, and the second equalizing pipeline is connected between the air outlets of multiple adsorption tanks and communicated with the adsorption tank air outlet pipeline.

[0010] Preferably, the portable nitrogen generator also includes a plurality of mounting seats corresponding to and matching the activated carbon tank, adsorption tank and buffer tank one by one, the mounting seat including an annular body and a connecting piece connected between the annular body and the base, the mounting seat corresponding to the adsorption tank is located on the rear side of the base, and the remaining mounting seats are located on the front side of the base.

[0011] Further preferably, the base includes a base body and reinforcing ribs staggeredly arranged on the base body, and the connecting piece is connected to the reinforcing ribs.

[0012] In some embodiments, the base further includes a plurality of universal wheel assemblies and fixed wheel assemblies installed at the bottom of the base.

[0013] Preferably, the nitrogen generating device further comprises an exhaust muffler installed on the exhaust pipe, wherein the exhaust muffler is located below the nitrogen generating device and an exhaust port thereof faces the base.

[0014] Preferably, the nitrogen production device also includes a filter installed on the adsorption tank outlet pipe, a buffer tank outlet pipe connected to the outlet of the buffer tank, and a flow meter, a pressure gauge, and a buffer tank outlet control valve arranged on the buffer tank outlet pipe; the buffer tank outlet pipe is connected to the exhaust pipe through a connecting pipe, a connecting pipe control valve is installed on the connecting pipe, and the connecting pipe control valve and the buffer tank outlet control valve are controlled by the control panel.

[0015] Preferably, the nitrogen production device further comprises a backflush pipeline connected between the buffer tank and the adsorption tank, and a one-way valve allowing gas to flow from the buffer tank to the adsorption tank and controlled by the control panel is installed on the backflush pipeline.

[0016] Preferably, the nitrogen generating device further comprises a compressed air intake pipe for connecting the air inlet with the activated carbon canister and a compressed air intake control valve installed on the compressed air intake pipe and controlled by the control panel.

[0017] Preferably, the air inlet and the air outlet are located in the same horizontal plane.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The multiple adsorption tanks of the utility model can work alternately, ensuring the continuity of the nitrogen production process. By arranging a balancing pipeline between the multiple adsorption tanks, it is ensured that during adsorption, the adsorption tanks adsorb the gas more fully, the speed of the gas passing through the adsorption tanks is more uniform, and the rate of nitrogen entering the buffer tank is more stable; the design of the detachable fixing ring and the box door is convenient for the maintenance and maintenance of the tank body such as the adsorption tank, and the simple modular structural design greatly reduces the manufacturing cost of the small nitrogen generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the nitrogen generator of Example 1;

[0021] Figure 2 This is a schematic diagram of the structure of the chassis of Example 1;

[0022] Figure 3 This is a schematic diagram of the structure of the chassis of Example 1 from another angle;

[0023] Figure 4 This is a schematic diagram of the structure of the chassis of Example 1 from another angle;

[0024] Figure 5 This is a schematic diagram of the structure of the nitrogen generating device and the base in Example 1;

[0025] Figure 6This is a structural schematic diagram of the nitrogen generating device and the base of Example 1 from another angle;

[0026] Figure 7 This is a schematic structural diagram of the base of Example 1;

[0027] Figure 8 This is a schematic structural diagram of the base of Example 1 from another angle;

[0028] Fig. 9 This is a simplified structural diagram of the nitrogen generator of Example 1;

[0029] Among them, 1, chassis; 11, front side; 12, left door; 13, right door; 14, rear door; 15, fixing ring; 151, first arc-shaped clamping body; 152, second arc-shaped clamping body; 16, air inlet; 17, air outlet; 18, push handle;

[0030] 2. Activated carbon canister;

[0031] 3. The first adsorption tank;

[0032] 4. The second adsorption tank;

[0033] 5. Buffer tank; 51. Flow meter; 52. Pressure gauge;

[0034] 6. Filter;

[0035] 7. Empty the muffler;

[0036] 8. Control panel;

[0037] 9. base; 91. universal wheel assembly; 92. fixed wheel assembly; 93. reinforcing ribs; 94. mounting seat; 941. annular body; 942. connecting piece;

[0038] A. Compressed air inlet pipeline; B. Adsorption tank inlet pipeline; C. First equalization pipeline; D. Second equalization pipeline; E. Adsorption tank outlet pipeline; F. Backflush pipeline; G. Exhaust pipeline G; H. Buffer tank outlet pipeline; I. Connecting pipeline;

[0039] V001, compressed air intake control valve; V100, adsorption tank intake control valve; V101, first control valve; V102, second control valve; V103, first balance control valve; V104, second balance control valve; V201, first adsorption tank outlet control valve; V202, second adsorption tank outlet control valve; V203, third balance control valve; V204, fourth balance control valve 4; V301, first exhaust control valve; V302, second exhaust control valve; V303, third exhaust control valve; V002, buffer tank outlet control valve; V401, one-way valve. DETAILED DESCRIPTION

[0040] Mobile nitrogen generator is a convenient and efficient nitrogen generator, which is widely used in various industrial production environments. Portable nitrogen generator has significant advantages such as wide working location, simple operation and low energy consumption. However, the nitrogen purity of existing nitrogen generator is often not high, and the manufacturing cost of the equipment is high, and it is not convenient to replace and repair.

[0041] The portable nitrogen generator of the present application not only produces nitrogen of high purity, but also has high running stability, is convenient for maintenance and replacement of parts, and has a simple modular structure design that greatly reduces its manufacturing cost. The present utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0042] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0043] In the description of the embodiments of the present invention, it should be understood that the descriptions of up and down, left and right, front and back, inside and outside, etc. in this document are based on Figure 1 The direction is defined.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0047] Example 1

[0048] A portable nitrogen generator, such as Figure 1 As shown, it includes a control panel 8, a movable base 9, a chassis 1 installed on the base 9, and a nitrogen generating device located in the chassis 1.

[0049] like Figure 5 , Figure 6 and Fig. 9 As shown, the nitrogen production device includes an activated carbon tank 2, an adsorption tank group, a buffer tank 5, an adsorption tank air inlet pipe B for connecting the activated carbon tank 2 with the adsorption tank group, an adsorption tank air inlet control valve V100 installed on the adsorption tank air inlet pipe B, an adsorption tank air outlet pipe E for connecting the buffer tank 5 with the adsorption tank group, an adsorption tank air outlet control valve installed on the adsorption tank air outlet pipe E, an emptying pipe G connected to the emptying port of the adsorption tank group, and an emptying control valve installed on the emptying pipe G. The adsorption tank group includes a plurality of adsorption tanks connected in parallel, and the plurality of adsorption tanks are connected through a balancing pipe, and a balancing control valve is installed on the balancing pipe. Preferably, the adsorption tank group includes two adsorption tanks, namely a first adsorption tank 3 and a second adsorption tank 4.

[0050] Furthermore, the equalizing pipeline includes a first equalizing pipeline C and a second equalizing pipeline D. The first equalizing pipeline C is connected between the air inlets of the first adsorption tank 3 and the second adsorption tank 4 and is connected to the adsorption tank air inlet pipeline B, and is used to balance the air inlet pressure of the adsorption tank. The first equalizing pipeline C is equipped with a first equalizing control valve V103 and a second equalizing control valve V104, and the adsorption tank air inlet pipeline B is connected to the equalizing pipeline between the first equalizing control valve V103 and the second equalizing control valve V104. The second equalizing pipeline D is connected between the air outlets of the first adsorption tank 3 and the second adsorption tank 4 and is connected to the adsorption tank air outlet pipeline E, and is used to balance the pressure of the adsorption tank when the adsorption tank is depressurized. The second equalizing pipeline D is equipped with a third equalizing control valve V203 and a fourth equalizing control valve V204. Through the design of the equalizing pipeline, it is ensured that during adsorption, the adsorption tank adsorbs the gas more fully, the speed of the gas passing through the adsorption tank is more uniform, and the rate at which nitrogen enters the buffer tank 5 is more stable.

[0051] The adsorption tank outlet pipe E comprises a first adsorption tank outlet branch pipe connected to the first adsorption tank 3, a second adsorption tank outlet branch pipe connected to the second adsorption tank 4, and an adsorption tank outlet main pipe connected to the first adsorption tank outlet branch pipe and the second adsorption tank outlet branch pipe. A precision filter 6 is installed on the adsorption tank outlet main pipe so that the nitrogen in the adsorption tank enters the downstream buffer tank 5 after being filtered. The gas outlet control valve through the adsorption tank comprises a first adsorption tank outlet control valve V201 installed on the outlet branch pipe of the first adsorption tank 3 and a second adsorption tank outlet control valve V202 installed on the outlet branch pipe of the second adsorption tank 4.

[0052] The exhaust pipe G includes a first exhaust branch pipe connected to the exhaust port of the first adsorption tank 3, a second exhaust branch pipe connected to the exhaust port of the second adsorption tank 4, and an exhaust main pipe connected to the first exhaust branch pipe and the second exhaust branch pipe. The exhaust control valve includes a first exhaust control valve V301 installed on the first exhaust branch pipe and a second exhaust control valve V302 installed on the second exhaust branch pipe. An exhaust muffler 7 is installed at the end of the exhaust main pipe, and the exhaust muffler 7 is located below the nitrogen making device and its exhaust port faces the base 9. The exhaust pipe G also includes a third exhaust branch pipe whose two ends are respectively connected to the first exhaust branch pipe and the second exhaust branch pipe, and the first control valve V101 and the second control valve V102 are installed on the third exhaust branch pipe. The first control valve V101 and the second control valve V102 are connected to the intake pipe B of the adsorption tank through a pipeline.

[0053] The nitrogen production device further includes a backflush pipe F connected between the buffer tank 5 and the adsorption tank, and a one-way valve V401 is installed on the backflush pipe F for allowing gas to flow from the buffer tank 5 to the adsorption tank.

[0054] The nitrogen generating device also includes a compressed air inlet pipe A for introducing compressed air into the activated carbon tank 2, a compressed air inlet control valve V001 installed on the compressed air inlet pipe A, a buffer tank outlet pipe H connected to the air outlet of the buffer tank 5, and a flow meter 51, a pressure gauge 52, and a buffer tank outlet control valve V002 arranged on the buffer tank outlet pipe H. The buffer tank outlet pipe H is connected to the exhaust pipe G through a connecting pipe I, and a connecting pipe control valve (i.e., a third exhaust control valve V303) is installed on the connecting pipe I.

[0055] like Figures 2 to 4As shown, the chassis 1 includes an upper side plate, a peripheral side plate arranged between the upper side plate and the base 9, and a fixing ring 15 fixedly mounted on the inner side wall of the chassis 1. A push handle 18 is installed on the upper side plate to facilitate the operator to push the chassis 1, thereby moving the nitrogen generator. A box door that can be opened or closed is provided on at least one side of the front, back, left and right sides of the peripheral side plate and at most three sides, and an air inlet 16 connected to the activated carbon canister 2 and an air outlet 17 connected to the buffer tank 5 are provided on any side of the chassis 1 that does not have a box door. The design of the box door facilitates the maintenance and maintenance of tanks such as adsorption tanks. In this embodiment, the chassis 1 is square, and a left box door, a right box door and a rear box door are respectively provided on the left, right and rear sides, wherein the rear box door is located in the middle of the rear side. The front side 11 has an air inlet 16 and an air outlet 17 located on the same horizontal plane, and the control panel 8 is located below the front side.

[0056] The fixing ring 15 has a plurality of fixing rings 15 that correspond to and match the activated carbon canister 2, the adsorption canister and the buffer canister 5 one by one, and are used to fix the activated carbon canister 2, the adsorption canister and the buffer canister 5. In this embodiment, there are four fixing rings 15. Among them, the two fixing rings 15 corresponding to the first adsorption canister 3 and the second adsorption canister 4 are fixedly installed on the left and right sides of the rear side wall of the chassis 1, the fixing ring 15 corresponding to the activated carbon canister 2 is installed on the left side of the front side wall of the chassis 1, and the fixing ring 15 corresponding to the buffer canister 5 is installed on the front side wall of the chassis 1 and is located between the first adsorption canister 3 and the second adsorption canister 4. The fixing ring 15 includes a first arc-shaped clamping body 151 and a second arc-shaped clamping body 152, and the first arc-shaped clamping body 151 and the second arc-shaped clamping body 152 are detachably matched together and are sleeved on the outside of the corresponding canister and are located in the middle and upper part of the canister. The design of the detachable fixing ring 15 facilitates the maintenance and maintenance of the canister body such as the adsorption canister. Preferably, the fixing ring 15 is a clamp.

[0057] like Figure 7 and Figure 8 As shown, the base 9 includes a base 9 body, reinforcing ribs 93 staggered on the base 9 body, and a plurality of mounting seats 94 corresponding to and matching the activated carbon tank 2, the adsorption tank, and the buffer tank 5. The mounting seat 94 includes an annular body 941 and a connecting member 942 connected between the annular body 941 and the base 9, and the connecting member 942 is connected to the reinforcing ribs 93. Such a design makes the nitrogen generator more stable.

[0058] In order to facilitate movement and fixation, the base 9 also includes a plurality of universal wheel assemblies 91 and fixed wheel assemblies 92 installed at the bottom of the base 9. The universal wheel assemblies 91 and the fixed wheel assemblies 92 are specifically described with reference to the prior art and are not limited in this application.

[0059] If not otherwise specified, the above-mentioned valves are solenoid valves, each of which is controlled by the control panel 8 and can be opened or closed.

[0060] Working principle:

[0061] During normal use, compressed air enters the activated carbon tank 2 through the air inlet 16 for preliminary filtration, and the filtered air enters the first adsorption tank 3 for pressurized adsorption. After the adsorption by the carbon molecular sieve in the adsorption tank is completed, the nitrogen in the first adsorption tank 3 enters the buffer tank 5 through the precision filter 6. At this time, the second adsorption tank 4 starts to adsorb and blows out the oxygen and other gases desorbed in the first adsorption tank 3 through the backblowing pipe F, and discharges through the emptying pipe G. When the second adsorption tank 4 completes nitrogen production, the first balancing pipe C is opened to balance the nitrogen pressure in the first adsorption tank 3 and the second adsorption tank 4, so as to achieve smooth delivery of nitrogen. Through the alternating control of the solenoid valve between the two adsorption tanks, the two adsorption tanks work alternately. When the nitrogen pressure in the buffer tank 5 reaches the use standard, the buffer tank outlet pipe H delivers pure nitrogen to the user through the outlet 17.

[0062] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A portable nitrogen generator, comprising a movable base, a chassis mounted on the base and a nitrogen generator located in the chassis, characterized in that: The nitrogen production device comprises an activated carbon tank, an adsorption tank group, a buffer tank, an adsorption tank air inlet pipe for connecting the activated carbon tank with the adsorption tank group, an adsorption tank air inlet control valve installed on the adsorption tank air inlet pipe, an adsorption tank air outlet pipe for connecting the buffer tank with the adsorption tank group, an adsorption tank air outlet control valve installed on the adsorption tank air outlet pipe, an emptying pipe connected to an emptying port of the adsorption tank group, and an emptying control valve installed on the emptying pipe, the adsorption tank group comprises a plurality of adsorption tanks connected in parallel, the plurality of adsorption tanks are connected through a balancing pipe, and a balancing control valve is installed on the balancing pipe; The chassis comprises an upper side plate, a peripheral side plate arranged between the upper side plate and the base, and a fixing ring fixedly mounted on the inner side wall of the chassis, and a push handle is mounted on the upper side plate; a box door that can be opened or closed is provided on at least one side of the front, back, left and right sides of the peripheral side plate and at most three sides, and an air inlet connected to the activated carbon canister and an air outlet connected to the buffer tank are provided on any side of the chassis that does not have a box door; the fixing ring has a plurality of parts that correspond to and match the activated carbon canister, adsorption tank and buffer tank one by one, and the fixing ring comprises a first arc-shaped clamping body and a second arc-shaped clamping body, and the first arc-shaped clamping body and the second arc-shaped clamping body are detachably matched together and clamped on the outside of the tank corresponding thereto and located in the middle and upper part of the tank; The portable nitrogen generator further comprises a control panel mounted on the chassis, and controlled by the control panel, the adsorption tank air inlet control valve, the adsorption tank air outlet control valve, the exhaust control valve and the balance control valve can be opened or closed.

2. The portable nitrogen generator according to claim 1, characterized in that: The equalizing pipeline includes a first equalizing pipeline and a second equalizing pipeline, wherein the first equalizing pipeline is connected between the air inlets of multiple adsorption tanks and communicated with the adsorption tank air inlet pipeline, and the second equalizing pipeline is connected between the air outlets of multiple adsorption tanks and communicated with the adsorption tank air outlet pipeline.

3. The portable nitrogen generator according to claim 1, characterized in that: The portable nitrogen generator also includes a plurality of mounting seats corresponding to and matching the activated carbon tank, the adsorption tank and the buffer tank, the mounting seat including an annular body and a connecting piece connected between the annular body and the base, the mounting seat corresponding to the adsorption tank is located on the rear side of the base, and the remaining mounting seats are located on the front side of the base.

4. The portable nitrogen generator according to claim 3, characterized in that: The base comprises a base body and reinforcing ribs staggeredly arranged on the base body, and the connecting piece is connected to the reinforcing ribs.

5. The portable nitrogen generator according to claim 1 or 4, characterized in that: The base also includes a plurality of universal wheel assemblies and fixed wheel assemblies installed at the bottom of the base.

6. The portable nitrogen generator according to claim 1, characterized in that: The nitrogen generator further comprises an exhaust silencer installed on the exhaust pipe, wherein the exhaust silencer is located below the nitrogen generator and an exhaust port thereof faces the base.

7. The portable nitrogen generator according to claim 1, characterized in that: The nitrogen production device also includes a filter installed on the adsorption tank outlet pipe, a buffer tank outlet pipe connected to the outlet of the buffer tank, and a flow meter, a pressure gauge, and a buffer tank outlet control valve arranged on the buffer tank outlet pipe. The buffer tank outlet pipe is connected to the exhaust pipe through a connecting pipe, and a connecting pipe control valve is installed on the connecting pipe. The connecting pipe control valve and the buffer tank outlet control valve are controlled by the control panel.

8. The portable nitrogen generator according to claim 1, characterized in that: The nitrogen production device further comprises a backflush pipeline connected between the buffer tank and the adsorption tank, and a one-way valve is installed on the backflush pipeline, which allows gas to flow from the buffer tank to the adsorption tank and is controlled by the control panel.

9. The portable nitrogen generator according to claim 1, characterized in that: The nitrogen generating device further comprises a compressed air intake pipeline for connecting the air inlet with the activated carbon canister and a compressed air intake control valve installed on the compressed air intake pipeline and controlled by the control panel.

10. The portable nitrogen generator according to claim 1, characterized in that: The air inlet and the air outlet are located at the same horizontal plane.

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