Oxygen generating unit adaptive to extremely low temperature environment

Abstract

The utility model relates to oxygen -making equipment technical field, and disclose a kind of oxygen generator unit of self-adaptive extremely low temperature environment, including container body, oxygen generator body, PLC controller, air compressor body, air compressor oil cylinder and adsorption tower, further include: set in the first heat tracing band of air compressor oil cylinder surface, the surface of adsorption tower is equipped with second heat tracing band;The utility model is through the setting of first heat tracing band and second heat tracing band, for the preheating of air compressor itself, can also heat preservation to adsorption tower, cooperate with the pipe and electric proportional ball valve, make hot air in exhaust passage inside to discharge to the inside of container body, room temperature can reach the purpose of heat preservation constant temperature under the condition of not increasing additional temperature supplement device, only in the initial stage of air compressor opening, consume small amount of external power, subsequent heat generated by air compressor body is used to continuously heat preservation inside, reduce the energy consumption of entire oxygen generator unit.

Description

Technical Field

[0001] This utility model relates to the field of oxygen production equipment technology, specifically an oxygen production unit that adapts to extremely low temperature environments. Background Technology

[0002] Pressure swing adsorption (PSA) oxygen concentrators are already well-established in most regions, including high-altitude, low-temperature areas such as Tibet and Qinghai, and the harsh winters of Northeast China. In recent years, the demand for oxygen concentrators in high-altitude areas has increased significantly. Since PSA oxygen concentrators require specific ambient temperatures (generally 0-40℃), ventilation ducts are typically installed in the machine room to exhaust heat from the compressor vents to the outside to prevent overheating. Furthermore, in winter conditions below freezing, radiators or air conditioners are placed in the machine room to prevent low temperatures.

[0003] Research indicates that sodium-type oxygen molecular sieves exhibit optimal adsorption capacity at 20°C; above or below 20°C, their performance decreases curvilinearly. At ambient temperatures around 0°C, the adsorption performance of the same mass of molecular sieve decreases by approximately 15%. With a constant oxygen flow rate, the oxygen purity output by an oxygen concentrator will decrease by 1%-3%. In low-temperature environments (below 0°C), many oxygen concentrators do not operate 24 hours a day; for example, at night when not in use, the air compressor, acting as the gas source, may enter a cold protection state after cooling down due to the low intake air temperature, preventing it from restarting. Installing air conditioning or heating to maintain a temperature above 0°C in the machine room results in significant energy waste. Utility Model Content

[0004] The purpose of this invention is to provide an oxygen generator unit that is adaptive to extremely low temperature environments and is not limited by low temperatures.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an oxygen generator unit adapted to extremely low temperature environments, comprising a container body, an oxygen generator body, a PLC controller, an air compressor body, an air compressor cylinder, and an adsorption tower, and further comprising:

[0006] A first heat tracing cable is installed on the surface of the air compressor cylinder, a second heat tracing cable is fitted on the surface of the adsorption tower, and a heat insulation layer is also provided on the outside of the second heat tracing cable. Several temperature sensors are fixed inside the container.

[0007] An exhaust duct is installed through one side of the container body to discharge the heat of the air compressor to the outside. A connecting pipe is connected to one side of the exhaust duct, and an electric proportional ball valve is connected to the outlet end of the connecting pipe.

[0008] Preferably, the oxygen generator unit is also equipped with a vertical cylinder, the bottom of which is connected to a shell, and the shell is connected to the top of the container body. A fan is fixed inside the vertical cylinder, and a sealing component is also provided inside the shell.

[0009] Preferably, the sealing assembly includes an electro-hydraulic rod, a connecting block, and a sealing plate. There are two sets of both the electro-hydraulic rod and the connecting block. The electro-hydraulic rods on both sides are respectively bolted to the two sides inside the housing. The output shaft of the electro-hydraulic rod is bolted to the connecting block, and the connecting block is bolted to the sealing plate.

[0010] Preferably, movable columns are bolted to both sides inside the housing, and sliding sleeves are bolted to both sides of the connecting block, with the sliding sleeves slidably connected to the surfaces of the movable columns.

[0011] Preferably, a dustproof net is bolted to the upper part of the interior of the vertical cylinder, and a top cover is also bolted to the top of the vertical cylinder.

[0012] Preferably, the electric proportional ball valve has a diameter of DN80.

[0013] Preferably, the temperature sensor is electrically connected to the PLC controller, and the PLC controller is electrically connected to the electric proportional ball valve, the first heat tracing cable, and the second heat tracing cable.

[0014] Preferably, the heat insulation layer is thermal insulation cotton.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses the first and second heat tracing cables to preheat the air compressor itself and heat and insulate the adsorption tower. With the connecting pipe and electric proportional ball valve, the hot air inside the exhaust duct is discharged into the interior of the container. The temperature inside the machine room can be kept constant without adding an extra heating device. Only a small amount of external power is consumed at the beginning of the air compressor operation. Subsequently, the heat generated by the air compressor itself is used to continuously keep the interior warm, reducing the energy consumption of the entire oxygen generator unit.

[0017] 2. This utility model, through the arrangement of the vertical cylinder, shell and fan, works in conjunction with the exhaust channel to dissipate heat inside the container during summer use, effectively preventing the internal temperature from overheating. Moreover, with the sealing component, the vertical cylinder is sealed in cold weather to prevent a large amount of cold air from entering. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the container body in this utility model;

[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a cross-sectional view of the heat insulation layer in this utility model;

[0022] Figure 5 This is a cross-sectional view of the vertical cylinder and the shell in this utility model;

[0023] Figure 6 This is a partial structural diagram of the sealing component in this utility model.

[0024] In the diagram: 1. Container body; 2. Oxygen generator body; 3. PLC controller; 4. Air compressor body; 5. Air compressor cylinder; 6. First heat tracing cable; 7. Adsorption tower; 8. Second heat tracing cable; 9. Insulation layer; 10. Temperature sensor; 11. Exhaust duct; 12. Connecting pipe; 13. Electric proportional ball valve; 14. Vertical cylinder; 15. Top cover; 16. Shell; 17. Sealing assembly; 171. Electric hydraulic rod; 172. Connecting block; 173. Sealing plate; 174. Sliding sleeve; 175. Movable column; 18. Dustproof net; 19. Fan. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-6As shown, an oxygen generator unit adapted to extremely low temperature environments includes a container body 1, an oxygen generator body 2, a PLC controller 3, an air compressor body 4, an air compressor cylinder 5, and an adsorption tower 7. The oxygen generator adsorption tower is the core device that uses the pressure swing adsorption (PSA) principle to separate air. Its function is to selectively adsorb nitrogen through molecular sieves and enrich oxygen. The surface of the air compressor cylinder 5 is provided with a first heating tape 6. The electric heating tape is composed of a conductive polymer, two parallel metal wires, and an insulating sheath. Its characteristics are that the conductive polymer has a high positive temperature coefficient and is connected in parallel. It can automatically adjust the output power according to the temperature change of the heated system, automatically limit the heating temperature, can be arbitrarily shortened or lengthened within a certain range, and allows multiple overlaps. Without the risk of high-temperature hotspots or burnout, the surface of the adsorption tower 7 is covered with a second heat tracing cable 8. The outer side of the second heat tracing cable 8 is also provided with a heat insulation layer 9, which is made of heat insulation cotton, to keep the heat emitted by the second heat tracing cable 8 warm and to effectively transfer the heat to the interior of the adsorption tower 7. Several temperature sensors 10 are fixed inside the container body 1, and the temperature sensors 10 are electrically connected to the PLC controller 3. An exhaust duct 11 is provided through one side of the container body 1 to exhaust the heat of the air compressor to the outside. A connecting pipe 12 is connected to one side of the exhaust duct 11, and an electric proportional ball valve 13 is connected to the outlet end of the connecting pipe 12. The PLC controller 3 is electrically connected to the electric proportional ball valve 13, the first heat tracing cable 6, and the second heat tracing cable 8.

[0027] When the equipment is shut down overnight or for several consecutive days during holidays, restarting the air compressor may cause it to enter a cold protection state due to low temperatures, preventing it from starting. To resolve this, the user simply needs to start the first heating tape 6 installed on the air compressor's internal oil cylinder two hours in advance. This allows the oil cylinder temperature to rise and be maintained at the preset temperature. The first heating tape 6 is set to 5°C. After the air compressor starts normally, it will discharge hot air to the outside through the exhaust duct 11. A DN80 electric proportional ball valve 13 is installed on the air compressor's exhaust pipe. Simultaneously, the first heating tape 6 is opened and set to 20°C. The sodium-type oxygen molecular sieve has optimal adsorption capacity at 20°C. When the indoor temperature is lower than the set value (preset 20°C), the temperature sensor 10 will send a signal to the PLC controller 3. The PLC controller 3 will then output a signal to the electric proportional ball valve 13, causing it to open at a certain angle. At this time, the hot air inside the exhaust duct 11 will be discharged through the valve. Electric proportional ball valve 13 discharges into the machine room to raise the temperature until it approaches the preset temperature. The proportional ball valve will then automatically adjust its angle to close according to the command of PLC controller 3. This allows the temperature inside the machine room to be kept constant without the need for additional heating devices, ensuring that the oxygen generator operates at its theoretically optimal temperature. This also ensures that the molecular sieve operates under optimal conditions, and the oxygen purity is unaffected by seasons or temperature (extremely low temperatures). About 10 minutes after the air compressor starts, the temperature of the air compressor cylinder will rapidly rise to above 5°C. At this time, the first heating cable 6 installed on the cylinder will automatically cut off the power according to the signal command of PLC controller 3. When the indoor temperature approaches 20°C, the second heating cable 8 will also automatically cut off the power according to the signal command of PLC controller 3. Only a small amount of external power is consumed in the initial stage of air compressor operation. Subsequently, the heat generated by the air compressor body 4 is used to continuously keep the interior warm, reducing the energy consumption of the entire oxygen generator unit.

[0028] However, during summer use, due to the poor air permeability of the container body 1 and the poor effect of exhausting the heat from the air compressor solely through the exhaust duct 11, the heat generated by the oxygen generator body 2 and other equipment accumulates inside the container body 1. Therefore, the device is also designed with a vertical cylinder 14. The bottom of the vertical cylinder 14 is connected to the shell 16, and the shell 16 is connected to the top of the container body 1. A fan 19 is fixed inside the vertical cylinder 14. When the temperature inside the container body 1 is too high, the PLC controller 3 controls the fan 19 to continue to run, and the heat is discharged through the shell 16 and the vertical cylinder 14, working together with the exhaust duct 11. A dustproof net 18 is attached to the top of the vertical cylinder 14 to prevent external dust from entering through the vertical cylinder 14. A top cover 15 is also attached to the top of the vertical cylinder 14 to provide a shielding effect and prevent rainwater from entering the interior of the container body 1 through the vertical cylinder 14.

[0029] Because the top of the vertical cylinder 14 is an open design, a large amount of cold air will enter in cold weather. Therefore, a sealing assembly 17 is installed inside the housing 16. The sealing assembly 17 includes an electric hydraulic rod 171, a connecting block 172, and a sealing plate 173. There are two sets of both the electric hydraulic rod 171 and the connecting block 172. The electric hydraulic rods 171 on both sides are bolted to the inside of the housing 16. The output shaft of the electric hydraulic rod 171 is bolted to the connecting block 172, and the connecting block 172 is bolted to the sealing plate 173. Opening the electric hydraulic rods on both sides... The pressure rod 171 extends its output shaft to drive the sealing plates 173 on both sides to approach and close each other, sealing the vertical cylinder 14 and effectively isolating external cold air. Movable columns 175 are bolted to both sides inside the housing 16, and sliding sleeves 174 are bolted to both sides of the connecting block 172. The sliding sleeves 174 are slidably connected to the surface of the movable columns 175. During the movement of the sealing plate 173, the sliding sleeves 174 on both sides can slide along the surface of the movable columns 175, thereby bearing the weight of the sealing plate 173 and effectively preventing the output shaft of the electric hydraulic rod 171 from being bent.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oxygen generator unit self-adapting to an extremely low temperature environment, comprising a container body (1), an oxygen generator body (2), a PLC controller (3), an air compressor body (4), an air compressor oil cylinder (5) and an adsorption tower (7), characterized in that, Also includes: The first heat tracing cable (6) is installed on the surface of the air compressor cylinder (5), the second heat tracing cable (8) is sleeved on the surface of the adsorption tower (7), and the outer side of the second heat tracing cable (8) is also provided with a heat insulation layer (9). Several temperature sensors (10) are fixed inside the container body (1). An exhaust duct (11) is provided through one side of the container body (1) to discharge the heat of the air compressor to the outside. A connecting pipe (12) is provided on one side of the exhaust duct (11), and an electric proportional ball valve (13) is provided at the outlet end of the connecting pipe (12).

2. The oxygen generating set for adaptive extreme low temperature environment according to claim 1, characterized in that: The oxygen generator is also equipped with a vertical cylinder (14), the bottom of which is connected to a shell (16), and the shell (16) is connected to the top of the container body (1). A fan (19) is fixed inside the vertical cylinder (14), and a sealing assembly (17) is also provided inside the shell (16).

3. The oxygen generating set for adaptive extreme low temperature environment according to claim 2, characterized in that: The sealing assembly (17) includes an electric hydraulic rod (171), a connecting block (172), and a sealing plate (173). There are two sets of electric hydraulic rods (171) and connecting blocks (172). The electric hydraulic rods (171) on both sides are respectively bolted to both sides inside the housing (16). The output shaft of the electric hydraulic rod (171) is bolted to the connecting block (172), and the connecting block (172) is bolted to the sealing plate (173).

4. The oxygen generating set for adaptive extreme low temperature environment according to claim 3, characterized in that: Movable columns (175) are bolted to both sides inside the housing (16), and sliding sleeves (174) are bolted to both sides of the connecting block (172), and the sliding sleeves (174) are slidably connected to the surface of the movable columns (175).

5. The oxygen generating set for adaptive extreme low temperature environment according to claim 2, characterized in that: A dustproof net (18) is attached to the upper part of the inside of the vertical cylinder (14), and a top cover (15) is also attached to the top of the vertical cylinder (14).

6. The oxygen generating set for adaptive extreme low temperature environment according to claim 1, characterized in that: The electric proportional ball valve (13) has a diameter of DN80.

7. An oxygen generator unit adapted to extremely low temperature environments according to claim 1, characterized in that: The temperature sensor (10) is electrically connected to the PLC controller (3), and the PLC controller (3) is electrically connected to the electric proportional ball valve (13), the first heat tracing cable (6), and the second heat tracing cable (8).

8. An oxygen generator unit adapted to extremely low temperature environments according to claim 1, characterized in that: The insulation layer (9) is thermal insulation cotton.

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