Oxygen and air mixing device

Abstract

The utility model discloses an oxygen and air mixing device. The oxygen and air mixing device comprises an air inlet blower; the adsorption tank is internally provided with a plurality of adsorption layers used for adsorbing impurities, the adsorption layers divide the internal space of the adsorption tank into an inner cavity and an outer cavity, air enters from the inner cavity, is changed into oxygen through the adsorption layers and enters the outer cavity, and the inner cavity of the adsorption tank is communicated with the air outlet of the air blower; an inlet of the buffer tank is communicated with the outer cavity of the adsorption tank; an air outlet of the gas mixing blower is communicated with an air inlet of the buffer tank; according to the oxygen and air mixing device, air is mixed in the oxygen preparation process, the oxygen concentration is monitored in real time through the sensor, it is ensured that the oxygen concentration is the required concentration, and the effect of simplifying the additional mixing step of mixed gas is achieved; belongs to the technical field of oxygen preparation devices.

Description

Technical Field

[0001] This utility model relates to the technical field of oxygen preparation devices, specifically to an oxygen and air mixing device. Background Technology

[0002] Oxygen is the world's second most consumed industrial gas and is used in many industries, from food processing and aquaculture to heavy industry and aerospace engineering. These industries usually require high-purity oxygen to participate in production, but often the air is not enough to support the requirements of some production work, so high-purity oxygen needs to be prepared.

[0003] A VPSA oxygen generator is a mechanical device used for oxygen production. It mainly consists of a blower, a vacuum pump, a switching valve, an adsorber, and an oxygen buffer tank. In actual use, air is sent to the adsorber by the blower, and the oxygen produced is sent to the oxygen buffer tank. However, some production processes require oxygen with a concentration of around 90%. Currently, VPSA oxygen generators do not have the structure to detect the corresponding oxygen concentration, resulting in inaccurate oxygen content. In this case, it is usually necessary for staff to extract the oxygen from the oxygen buffer tank and mix it with the air to obtain the target oxygen concentration. Utility Model Content

[0004] To address the technical problems existing in the prior art, the purpose of this utility model is to provide an oxygen-air mixing device that solves the problem that current VPSA oxygen generation stations do not have a structure to detect the corresponding oxygen concentration, resulting in inaccurate oxygen content. Currently, it requires staff to export oxygen from the oxygen buffer tank and mix it with air to obtain the target oxygen concentration.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An oxygen-air mixing device includes: an intake blower; an adsorption tank having several adsorption layers inside for adsorbing impurities, the adsorption layers dividing the internal space of the adsorption tank into an inner cavity and an outer cavity, air entering from the inner cavity, passing through the adsorption layers to become oxygen and entering the outer cavity, the inner cavity of the adsorption tank being connected to the air outlet of the blower; a buffer tank having its inlet connected to the outer cavity of the adsorption tank; a mixing blower having its outlet connected to the air inlet of the buffer tank; and a sensor having one end disposed inside the buffer tank and communicating with the mixing blower.

[0007] Preferably, the device also includes a vacuum pump and several control valves. The number of adsorption tanks is set to two, namely a first adsorption tank and a second adsorption tank. The inner cavity of the first adsorption tank, the outlet of the air inlet blower, the inner cavity of the second adsorption tank, and the air inlet of the vacuum pump are connected by several pipes. Some control valves are set in the pipes between the inner cavity of the first adsorption tank, the outlet of the air inlet blower, the inner cavity of the second adsorption tank, and the air inlet of the vacuum pump to change the air intake and exhaust state of the first adsorption tank and the second adsorption tank. The outer cavities of the first adsorption tank and the second adsorption tank are both connected to the inlet of the buffer tank. Two control valves are respectively set near the first adsorption tank and between the second adsorption tank and the buffer tank.

[0008] Preferably, the outer cavities of the first adsorption tank and the second adsorption tank are connected to the buffer tank through a three-way pipe, wherein two control valves are located at both ends of the three-way pipe near the first adsorption tank and the second adsorption tank.

[0009] Preferably, the air outlet of the blower is connected to the end of the tee pipe near the buffer tank.

[0010] Preferably, both the air intake blower and the air mixing blower are equipped with filters at their air inlets.

[0011] Preferably, the number of sensors is set to several.

[0012] Preferably, each sensor is positioned at a different horizontal height on the buffer tank.

[0013] Preferably, the inlet of the buffer tank is equipped with propeller blades.

[0014] In summary, this utility model has the following advantages:

[0015] 1. In the oxygen and air mixing device of this utility model, after the gas in the adsorption tank is discharged to the buffer tank through a three-way pipe, the mixing blower works to re-mix the filtered air. At this time, the sensor installed in the buffer tank detects the oxygen content in the mixed gas. When the oxygen concentration reaches the target concentration, the sensor sends a signal to stop the mixing blower.

[0016] 2. In the oxygen and air mixing device of this utility model, after the adsorption layer in the first adsorption tank is saturated, part of the control valve is closed to change the passage. At this time, the air intake blower delivers air to the second adsorption tank, and the vacuum pump extracts gas from the first adsorption tank so that the impurities adsorbed by the adsorption layer in the first adsorption tank are removed. This process is repeated alternately to achieve the effect of continuous oxygen supply.

[0017] 3. The air inlet of both the air inlet blower and the air mixing blower of the oxygen and air mixing device of this utility model are equipped with filters, thereby reducing the risk of dust and other impurities entering the equipment and thus effectively ensuring the service life of the equipment.

[0018] 4. The oxygen-air mixing device of this utility model has multiple sensors installed at different horizontal heights to detect the gas at different positions in the buffer tank, thereby helping to ensure the accuracy of the oxygen-air mixture ratio.

[0019] 5. The inlet of the buffer tank of the oxygen and air mixing device of this utility model is provided with a propeller blade. The propeller blade is driven to rotate under the flow of the prepared oxygen and mixed air, thereby achieving the purpose of mixing oxygen and air, and reducing the possibility that uneven mixing of the two gases will affect the detection accuracy of the sensor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall structure of the oxygen and air mixing device in the embodiment.

[0022] Figure 2 This is a schematic diagram of the gas flow direction when the first adsorption tank is first introduced into the embodiment.

[0023] Figure 3 This is a schematic diagram of the gas flow direction when the adsorption layer of the first adsorption tank is saturated and the second adsorption tank is filled with gas, as shown in the embodiment.

[0024] Figure 4 This is a schematic diagram of the gas flow direction when the adsorption layer of the second adsorption tank is saturated and the first adsorption tank is filled with gas, as shown in the embodiment.

[0025] Explanation of reference numerals in the attached drawings: 1. Intake blower; 2. Buffer tank; 3. Mixing blower; 4. Sensor; 5. Vacuum pump; 6. Control valve; 7. Adsorption layer; 8. Inner cavity; 9. Outer cavity; 10. First adsorption tank; 11. Second adsorption tank; 12. Main pipe; 13. Branch pipe; 14. T-junction pipe; 15. Filter; 16. Propeller blade. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0030] like Figures 1-4 As shown, this embodiment provides an oxygen and air mixing device, including: an intake blower 1, an adsorption tank, a buffer tank 2, a mixing blower 3, a sensor 4, a vacuum pump 5, and several control valves 6.

[0031] The adsorption tank is provided with several layers of barrel-shaped adsorption layers 7 for adsorbing impurities. The adsorption layers 7 divide the internal space of the adsorption tank into an inner cavity 8 and an outer cavity 9. During oxygen preparation, air enters from the inner cavity 8 and passes through the adsorption layers 7. After the impurity gas is adsorbed, oxygen remains in the outer cavity 9. In this embodiment, the number of adsorption tanks is set to two, namely a first adsorption tank 10 and a second adsorption tank 11. The bottom of the first adsorption tank 10 and the second adsorption tank 11 are provided with main pipes 12. One end of the two main pipes 12 is connected to the inner cavity 8 of the first adsorption tank 10 and the second adsorption tank 11, respectively. Two branch pipes 13 are provided between the two main pipes 12. The two branch pipes 13 connect the two main pipes 12. The two ends of one branch pipe 13 are connected to the ends of the two main pipes 12 away from the first adsorption tank 10 and the second adsorption tank 11, and the two ends of the other branch pipe are respectively provided on the outer circumferential surface of the two main pipes 12.

[0032] In this embodiment, the number of control valves 6 is set to six, and they are designated as A, B, C, D, E, and F. Four of the control valves 6 are set in pairs on two branch pipes 13. The air outlet of the air intake blower 1 is connected to the two control valves 6 A and B on one of the branch pipes 13 through a pipe. The air inlet of the vacuum pump 5 is connected to the two control valves 6 C and D on the other branch pipe 13.

[0033] A three-way pipe 14 is provided between the first adsorption tank 10 and the second adsorption tank 11 and the buffer tank 2. One end of the three-way pipe 14 is connected to the inside of the buffer tank 2, and the other two ends are connected to the outer cavity 9 of the first adsorption tank 10 and the second adsorption tank 11, respectively. Control valves E and F are respectively provided at the two ends of the three-way pipe 14 connected to the first adsorption tank 10 and the second adsorption tank 11.

[0034] The air outlet of the mixing blower 3 is connected to the end of the three-way pipe 14 near the buffer tank 2. Both the mixing blower 3 and the air inlet of the near blower are equipped with filters 15 to prevent dust and other impurities in the air from entering the equipment, thereby helping to ensure the service life of the equipment.

[0035] In this embodiment, the number of sensors 4 is set to several, and each sensor 4 is installed in the buffer tank 2, with one end of each sensor 4 located inside the buffer tank 2, thereby measuring the proportion of oxygen content in the mixed gas inside the buffer tank 2. Each sensor 4 is set at a different horizontal height in the buffer tank 2, and each sensor 4 detects the gas inside the buffer tank 2 from a different position, which helps to ensure the accuracy of gas detection. The inlet of the buffer tank 2 is provided with a propeller blade 16, which mixes oxygen and air when they enter the buffer tank 2, thereby helping to ensure the uniformity of the gas and further ensuring the accuracy of gas detection.

[0036] The implementation principle of the oxygen-air mixing device in this application is as follows:

[0037] When the first adsorption tank 10 is first introduced: control valves 6 B, E, and G are closed. Air enters the inner cavity 8 of the first adsorption tank 10 through the intake blower 1 and the main pipe 12 via control valve 6 and one of the main pipes. Under the action of the pressure adsorption layer 7, the impurities in the air are adsorbed by the adsorbent layer 7 and enter the outer cavity 9 of the first adsorption tank 10. The air then flows to the buffer tank 2 through control valve 6 and the three-way pipe 14. After a period of time, the mixing blower 3 starts to work and injects air into the buffer tank 2. The air and the prepared oxygen are mixed under the stirring of the propeller blades 16. At the same time, the sensor 4 detects the gas in the buffer tank 2. When the oxygen concentration reaches the target value, the mixing blower 3 stops working. When the oxygen concentration is lower than the target value, the mixing blower 3 starts working.

[0038] When the adsorption layer 7 of the first adsorption tank 10 is saturated and the second adsorption tank 11 is intake: control valves B, C, and F are closed. Air enters the inner cavity 8 of the second adsorption tank 11 through the intake blower 1 and via control valve E and one of the main pipes 12. Under the action of the pressure adsorption layer 7, impurities in the air are adsorbed by the adsorbent layer 7 and enter the outer cavity 9 of the second adsorption tank 11. They then flow to the buffer tank 2 through control valve G and three-way pipe 14. The mixing blower 3 is started or stopped according to the signal from sensor 4. While the intake blower 1 is working, the impurities adsorbed on the adsorption layer 7 in the first adsorption tank 10 are discharged by the vacuum pump 5 through the inner cavity 8 of the first adsorption tank 10 and control valve A, in preparation for the next alternation.

[0039] When the adsorption layer 7 of the second adsorption tank 11 is saturated and the first adsorption tank 10 is filled with gas: it is basically the same as when the first adsorption tank 10 is filled with gas for the first time. The difference is that the vacuum pump 5 works at the same time. The gaseous impurities adsorbed on the adsorption layer 7 of the second adsorption tank 11 flow from the inner cavity 8 of the second adsorption tank 11 through the B control valve 6 to the vacuum pump 5 and are discharged, so as to prepare for the next alternation.

[0040] By alternating as described above, a continuous oxygen supply can be achieved. Through the combined operation of sensor 4 and mixing blower 3, the oxygen-air mixture in buffer tank 2 can be maintained in a range where the oxygen concentration is close to the target concentration.

[0041] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made in accordance with the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An oxygen and air mixing device, characterized by, The application relates to an oxygen generator. The oxygen generator comprises: an air inlet blower; an adsorption tank, which is provided with a plurality of adsorption layers for adsorbing impurities, the adsorption layers separating the internal space of the adsorption tank into an inner cavity and an outer cavity, air entering the inner cavity, being changed into oxygen by the adsorption layers and entering the outer cavity, the inner cavity of the adsorption tank being in communication with the air outlet of the air inlet blower; a buffer tank, the inlet of the buffer tank being in communication with the outer cavity of the adsorption tank; a gas mixing blower, the air outlet of the gas mixing blower being in communication with the air inlet of the buffer tank; 2. An oxygen and air mixing device according to claim 1, characterised in that: a sensor for detecting the oxygen content, one end of the sensor being arranged in the buffer tank and being in communication connection with the gas mixing blower.

3. An oxygen and air mixing device according to claim 2, characterised in that: The oxygen generator further comprises a vacuum pump and a plurality of control valves, the number of the adsorption tanks is two, i.e. a first adsorption tank and a second adsorption tank, the inner cavity of the first adsorption tank, the air outlet of the air inlet blower, the inner cavity of the second adsorption tank and the air inlet of the vacuum pump being connected by a plurality of pipelines, some of the control valves being arranged in the pipelines between the inner cavity of the first adsorption tank, the air outlet of the air inlet blower, the inner cavity of the second adsorption tank and the air inlet of the vacuum pump, so as to change the air inlet and outlet states of the first adsorption tank and the second adsorption tank, the outer cavities of the first adsorption tank and the second adsorption tank being in communication with the inlet of the buffer tank, two of the control valves being arranged between the first adsorption tank and the buffer tank and between the second adsorption tank and the buffer tank.

4. An oxygen and air mixing device according to claim 3, characterised in that: The outer cavities of the first adsorption tank and the second adsorption tank are in communication with the buffer tank through a three-way pipeline, two of the control valves being arranged at the two ends of the three-way pipeline close to the first adsorption tank and the second adsorption tank.

5. An oxygen and air mixing device as defined in claim 1, wherein: The air outlet of the gas mixing blower is in communication with the end of the three-way pipeline close to the buffer tank.

6. An oxygen and air mixing device according to claim 1, characterized in that: The air inlet blower and the gas mixing blower are provided with filters.

7. An oxygen and air mixing device according to claim 6, characterised in that: The number of the sensors is a plurality.

8. An oxygen and air mixing device according to claim 1, characterized in that: The sensors are arranged at different horizontal positions of the buffer tank. The inlet of the buffer tank is provided with a propeller blade.

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