CN215973188U - Oxygen concentration uniformity adjusting system - Google Patents
Oxygen concentration uniformity adjusting system Download PDFInfo
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- CN215973188U CN215973188U CN202023285863.8U CN202023285863U CN215973188U CN 215973188 U CN215973188 U CN 215973188U CN 202023285863 U CN202023285863 U CN 202023285863U CN 215973188 U CN215973188 U CN 215973188U
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Abstract
The utility model relates to an oxygen concentration uniformity adjusting system, comprising: the air-tight storehouse is characterized in that the top or the side wall of the air-tight storehouse is provided with an air inlet pipeline and an air outlet pipeline; the oxygen concentration uniformity detection device is connected to the airtight storehouse and is configured to obtain an oxygen concentration field distribution state sample in the airtight storehouse; and the oxygen control device is connected to the airtight storehouse and is configured to adjust the oxygen concentration and the uniformity thereof in the airtight storehouse according to the distribution state of the oxygen concentration field in the airtight storehouse.
Description
Technical Field
The utility model relates to the field of air conditioning, in particular to an oxygen concentration uniformity adjusting system.
Background
The problem of pest control has become a universal problem to be solved urgently in the field of storage of traditional Chinese medicinal materials and the like. The reasonable maintenance of the traditional Chinese medicinal materials is an important measure for ensuring the quality of the traditional Chinese medicinal materials and is an important link for reducing loss and improving economic benefit. During storage of Chinese medicinal materials, deterioration of Chinese medicinal materials, such as mildew, discoloration, odor, oil bleeding, etc., can be caused by various factors. Chemical fumigation and physical radiation methods easily cause the overproof chemical residues and irreversible damage to medicinal materials, affect the quality of the medicinal materials, pollute the environment and even harm the health of workers. In 2014, the prescription is clearly specified in the Chinese herbal medicine storage management Specification (SB/T11094-2014) issued by the national ministry of commerce: the Chinese medicinal materials should not be fumigated by aluminum phosphide or sulfur during storage. Although the freeze insecticidal method can avoid the above problems, it is difficult to achieve large-scale mass insecticidal treatment due to high cost.
Low-oxygen air-conditioning insecticidal curing methods have been proposed in the prior art. The low-oxygen air-conditioning insecticidal curing method is a safe and environment-friendly insecticidal method with zero pollution, zero residue and zero damage. The current low-oxygen controlled atmosphere insecticidal system has errors in equipment detection due to non-uniform oxygen concentration in a storehouse and has low insecticidal efficiency. Therefore, how to realize the hypoxic pest control treatment more efficiently, conveniently and at low cost is of great significance to the field.
The area and volume of the traditional Chinese medicinal material low-oxygen air-conditioned storehouse are large, the regulating capacity of the traditional low-oxygen air-conditioned system is limited, and the uniformity of the oxygen concentration of the environment in the storehouse cannot be ensured, so that the oxygen concentration value of the environment in the storehouse is difficult to accurately control.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems in the prior art, the utility model provides an oxygen concentration uniformity adjusting system, which is characterized by comprising the following components: the air-tight storehouse is characterized in that the top or the side wall of the air-tight storehouse is provided with an air inlet pipeline and an air outlet pipeline; the oxygen concentration uniformity detection device is connected to the airtight storehouse and is configured to obtain an oxygen concentration field distribution state sample in the airtight storehouse; and the oxygen control device is connected to the airtight storehouse and is configured to adjust the oxygen concentration and the uniformity thereof in the airtight storehouse according to the distribution state of the oxygen concentration field in the airtight storehouse.
Specifically, the oxygen concentration uniformity detection device includes: an oxygen concentration field calculation unit configured to calculate a time-varying relation of an oxygen concentration field distribution pattern in the airtight storehouse; and the main control unit is coupled to the oxygen concentration field calculation unit and is configured to generate corresponding control signals according to the time-varying relation of the distribution state of the oxygen concentration field and control the oxygen control device to adjust the oxygen concentration and the uniformity thereof in the airtight storehouse according to the control signals.
Specifically, the oxygen concentration uniformity detection device includes: the oxygen concentration detection unit comprises a plurality of oxygen concentration sensors which are uniformly arranged in the airtight storehouse; and the control unit is coupled to the oxygen concentration detection unit and responds to the detection result of the oxygen concentration detection unit to control the oxygen control device to adjust the oxygen concentration and the uniformity of the oxygen concentration in the airtight storehouse.
In particular, the oxygen control device comprises: the oxygen removing device is connected to the air inlet end of the air inlet pipeline and is configured to reduce the oxygen concentration in the airtight storehouse after being opened; a gas pipeline connected to the gas outlet end of the gas inlet pipeline, arranged in the airtight storehouse and configured to provide a gas path for gas entering through the gas inlet pipeline; and the air outlet structure is arranged on the gas pipeline and is configured to communicate the inside of the gas pipeline with the airtight storehouse.
In particular, the oxygen scavenging device comprises: the gas transmission device is arranged outside the airtight storehouse; and the gas transmission pipeline is communicated with the gas transmission device and the even-number operation gas inlet pipeline.
In particular, the oxygen control device further comprises: and the internal circulation device is arranged in the airtight storehouse and is configured to control the directional flow of the gas in the airtight storehouse after being opened.
In particular, the internal circulation device comprises: the gas guide devices are arranged on the side wall of the airtight storehouse and can enable gas to flow directionally; and the internal circulation pipelines are arranged in the airtight storehouse or outside the airtight storehouse, and each internal circulation pipeline is communicated with at least one gas guide device.
Particularly, the air outlet structure is a multi-directional air valve, and the multi-directional air valve can control air outlet and air outlet angle.
In particular, the multi-directional air valve is arranged at a position far away from the air outlet pipeline.
Particularly, the air outlet structure is an air outlet, and the aperture and the density of the air outlet are inversely proportional to the distance between the air outlet and the air inlet pipeline.
The utility model provides an oxygen concentration uniformity governing system can be stable for a long time keep the oxygen concentration in airtight storehouse 100 stable and even. The mode simulation data that passes through the oxygen concentration field with airtight storehouse inner space obtains accurate oxygen content data, also can realize accurate accuse oxygen work, not only can put down local oxygen content too high, can avoid unnecessary oxygen reduction work moreover, can reduce the energy consumption, can reduce the routine maintenance loss moreover.
Drawings
Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a logic structure of an oxygen concentration uniformity adjustment system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an external structure of a part of an oxygen concentration uniformity adjusting system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the internal structure of a part of the oxygen concentration uniformity adjusting system according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of an oxygen removal device according to one embodiment of the present invention;
FIG. 5 is a schematic view of an internal circulation device according to one embodiment of the present invention;
FIG. 6 is an exemplary illustration of a multi-directional gas valve and its surrounding spatial area in accordance with one embodiment of the present invention; and
fig. 7 is an exemplary diagram of a region of an airtight depot space according to an embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural, logical or electrical changes may be made to the embodiments of the present application.
The application relates to an oxygen concentration uniformity adjustment system. Fig. 1 is a schematic diagram of a logical structure of an oxygen concentration uniformity adjusting system according to an embodiment of the present invention, fig. 2 is a schematic diagram of an external structure of a part of an oxygen concentration uniformity adjusting system according to an embodiment of the present invention, and fig. 3 is a schematic diagram of an internal structure of a part of an oxygen concentration uniformity adjusting system according to an embodiment of the present invention.
As shown in fig. 1, 2 and 3, the oxygen concentration uniformity adjusting system includes an airtight storehouse 100. The airtight storehouse 100 includes: the air-tight door 193 is arranged on the top plate 191 of the storehouse, the wallboard 192 of the storehouse, the ground 194 of the storehouse, the air inlet pipeline 101 and the air outlet pipeline 102. The inlet 101 and outlet 102 pipes may be provided on the ceiling 191 or the wall 192 of the warehouse. In some embodiments, inlet 101 and outlet 102 air lines are provided on the ceiling 191 of the library. Therefore, the ventilation efficiency is higher, the contact with ground personnel is avoided, and the safety is high. In some embodiments, the inlet line 101 and the outlet line 102 further comprise airtight valves, and when the airtight valves are closed, the inlet line 101 and the outlet line 102 have no gas communication with the outside, so as to ensure the airtightness of the airtight storehouse 100. In some embodiments, the airtight warehouse 100 is an airtight space constructed by a rigid airtight plate and an airtight door, and the warehouse has good airtightness, so that the disturbance of the external environment of the warehouse on the relative oxygen concentration in the warehouse can be effectively prevented.
In some embodiments, the inlet line 101 and outlet line 102 are arranged as shown in FIG. 3. The air outlet of the air inlet pipeline 101 is slightly lower than or equal to the top plate 191 of the storehouse, and the air inlet of the air outlet pipeline 102 is slightly higher than the ground 194 of the storehouse. The process of removing oxygen in the airtight storehouse 100 is completed by an air inlet pipeline 101 and an air outlet pipeline 102. Typically, a gas source (e.g., a nitrogen gas source) is connected to the gas inlet line 101 to slowly introduce nitrogen gas into the airtight storage 100. Since the density of nitrogen is less than that of oxygen, nitrogen enters the airtight storehouse 100 and then passes through the top layer of the airtight storehouse 100, and gradually rushes into the airtight storehouse 100 from top to bottom, and oxygen or gas with higher oxygen content is discharged to the outside through the gas outlet pipeline 102 at the lower part. In some embodiments, the inlet and outlet arrangements of inlet line 101 and outlet line 102 are reversed, allowing gas to enter via outlet line 102, so that oxygen is discharged via inlet line 101. In this case, the gas density is greater than oxygen.
In some embodiments, the aforementioned aeration process is between 0.5 hours and 100 hours, depending on the volume of the airtight warehouse, the purity of the gas, and the amount of the gas.
The oxygen concentration uniformity adjusting system further includes an oxygen concentration uniformity detecting device 110 connected to the inside of the airtight storehouse 100. The oxygen concentration uniformity detecting means may be provided outside or inside the airtight storehouse 100. The oxygen concentration uniformity detection apparatus can detect the distribution pattern of the oxygen concentration field in the airtight storehouse 100. Specifically, the oxygen concentration uniformity detection device may obtain the oxygen concentration conditions of the current time point and the spaces at different positions in the airtight storehouse 100, and accordingly determine whether the oxygen concentration in the current airtight storehouse 100 is uniform or not and the positions of the non-uniform spaces.
In some embodiments, the oxygen concentration uniformity detection apparatus 110 includes: an oxygen concentration field calculation unit 111 and a main control unit 112.
An oxygen concentration field calculation unit 111 configured to calculate a time-varying relationship of the distribution pattern of the oxygen concentration field in the airtight storehouse 100. Specifically, the oxygen concentration field calculation unit 111 may obtain the oxygen concentration conditions of the spaces at different positions in the airtight storehouse 100 at the current time point. In some embodiments, this acquisition may be a big data simulation result. In another embodiment, the acquisition may be performed by calculating the time-varying oxygen concentration field in the airtight storehouse 100 by a mathematical model simulation with knowledge of the initial oxygen concentration. In some embodiments, this manner of computational acquisition may also be used in conjunction with spatial regionalization within the airtight store 100. For example, the space in the airtight storehouse 100 may be divided into 16 regions, and the oxygen concentration field distribution patterns of the 16 regions may be acquired in the above manner. Therefore, the process of adjusting the uniformity of the subsequent oxygen concentration is more targeted. In some embodiments, the oxygen concentration field calculation unit 111 calculates the oxygen concentration field profile throughout the airtight storage 100 from the acquired data by acquiring the oxygen concentration in a specific region by providing an oxygen detection sensor in the airtight storage 100.
A main control unit 112 coupled to the oxygen concentration field calculation unit 111. After obtaining the oxygen concentration field distribution pattern, the oxygen concentration field calculation unit 111 obtains a time-varying relationship of the oxygen concentration field distribution pattern, and sends the obtained oxygen concentration field distribution pattern to the main control unit 112. Thus, when the oxygen concentration in a certain area changes beyond a preset value, the main control unit 112 can generate a corresponding control signal, and control the oxygen control device 120 to adjust the uniformity of the oxygen concentration in the airtight storehouse according to the control signal.
Compared with the traditional detection method, the method for obtaining the oxygen concentration field distribution state sample through calculation does not need to monitor the oxygen concentration value of a specific area in real time, so that the energy consumption is lower.
In other embodiments, the oxygen concentration uniformity detecting apparatus 110 includes: an oxygen concentration detection unit 113 and a manipulation unit 114.
And an oxygen concentration detection unit 113 including a plurality of oxygen concentration sensors uniformly disposed in the airtight storehouse 100.
And a control unit 114, coupled to the oxygen concentration detection unit 113, for controlling the oxygen control device 120 to adjust the oxygen concentration and uniformity thereof in the airtight storage room in response to the detection result (i.e., the oxygen concentration field distribution pattern) of the oxygen concentration detection unit 113. Specifically, the oxygen concentration value of a certain region detected by the oxygen concentration detection unit 113 is compared with a predetermined value, and when the oxygen concentration in the airtight storage 100 exceeds a return difference range of the predetermined oxygen concentration value, the control unit 114 activates the oxygen control device 120.
The oxygen concentration uniformity adjusting system further comprises an oxygen control device 120 connected to the airtight storage 100 and the oxygen concentration uniformity detecting device 110, and configured to adjust the uniformity of the oxygen concentration in the airtight storage 100 according to the distribution pattern of the oxygen concentration field in the airtight storage 100. Fig. 4 is a schematic view of an oxygen removal device according to an embodiment of the present invention, and fig. 5 is a schematic view of an internal circulation device according to an embodiment of the present invention. The detailed structure of the oxygen control device 120 will be described with reference to fig. 4 and 5.
The oxygen control device 120 includes: gas transmission device 122, gas transmission pipeline 121, gas pipeline 123 and gas outlet structure 124.
Wherein the gas transmission device 122 and the gas transmission pipeline 121 together form an oxygen removing device.
As shown in fig. 4, the gas transmission device 122 is disposed outside the airtight storehouse 100, and is connected to the gas intake pipe 101 via a gas transmission pipe 121. In some embodiments, the gas delivery device 122 is a source of nitrogen gas.
A gas line 123, connected to the gas outlet end of the gas inlet line 101, is disposed within the gas-tight storage 100 and is configured to provide a gas path for gas entering through the gas inlet line 101.
And a gas outlet structure 124 disposed on the gas pipeline 123 and configured to communicate the inside of the gas pipeline 123 with the airtight storehouse. In some embodiments, the air outlet structure 124 is a multi-directional air valve, which can control whether to outlet air or not and the air outlet angle. In some embodiments, the exit structure 124 is an exit hole having an exit hole diameter inversely proportional to the density and distance of the exit hole from the inlet conduit 101.
In some embodiments, the oxygen control device 120 further comprises:
the internal circulation device, as shown in fig. 5, includes a plurality of gas guide means 125 provided at the side wall of the airtight storehouse 100. And a plurality of internal circulation pipes 126 disposed inside or outside the airtight storehouse 100, each internal circulation pipe 126 communicating two of the gas guiding devices. In some embodiments, the internal circulation line 126 is disposed outside the airtight storehouse 100. After the gas guide device 125 is opened, the gas in the airtight storehouse 100 circularly and directionally flows along a fixed direction, so that the uniformity adjustment of the gas concentration in the airtight storehouse 100 is realized.
In some embodiments, the internal circulation line 126 and the gas line 123 are the same line.
The working process of the technical scheme of the application is further explained by the specific implementation mode. Fig. 6 is a view illustrating a multi-directional gas valve and a space area around the gas valve according to an embodiment of the present invention, and fig. 7 is a view illustrating a space area of an airtight storehouse according to an embodiment of the present invention.
In the present embodiment, the selective oxygen concentration uniformity detecting apparatus 110 includes: the oxygen concentration field calculation unit 111 and the main control unit 112 select the air outlet structure 124 as a multi-directional air valve.
First, high-purity nitrogen gas is introduced from the gas inlet line 101, and excess gas is discharged through the gas outlet line 102. In some embodiments, the internal circulation device may be activated during the process to provide a uniform reduction in the oxygen concentration in the reservoir. The oxygen concentration in the airtight storehouse (100) is adjusted to meet the preset value and is uniform. The airtight storehouse 100 is then closed. In the present embodiment, the space in the airtight storehouse 100 is divided into 16 regions, and as shown in fig. 7, the four adjacent regions share one air outlet structure 124 (i.e., a multi-directional air valve). The air outlet structures 124 can control the opening and closing and the air outlet angle thereof through the main control unit, and each air outlet structure 124 can cover four areas around the air outlet structure, as shown in fig. 6, the air outlet structures 124 can respectively discharge air towards the areas 301, 302, 303, and 304, or discharge air towards any angle such as the right upper side or the right lower side.
In maintaining the oxygen concentration in the airtight storehouse 100, the oxygen concentration field calculation unit 111 calculates the change of the oxygen concentration field in the storehouse with the passage of time according to a corresponding algorithm.
In some embodiments, when a certain point of time, the oxygen concentration field calculation unit 111 acquires, for example, that the oxygen concentration at the region 304 is lower than a preset value. The result is sent to the master control unit 112. The main control unit 112 turns on the gas delivery device 122 of the oxygen removal device in the oxygen control device 120.
When the gas delivery device 122 is activated, gas produced by the gas delivery device 122 passes through the gas delivery conduit 121 and enters the gas inlet conduit 101. The main control unit 112 controls the gas outlet structure 124 corresponding to the area 304 to be opened (other parts are continuously closed), and adjusts the angle to aim at the area 304 to disperse the atmosphere in the area 304, so that the gas is forcibly mixed, and the gas environment is more uniform.
In some embodiments, the accumulated (non-uniform) oxygen generally accumulates below the hermetic store 100 due to the higher oxygen density than nitrogen. Therefore, the air outlet structure 124 is disposed at a side away from the air outlet pipe 102. As shown in fig. 7, the outlet pipes 102 may be disposed on the other side of the diagonal of the angle between the two outlet structures 124. This allows oxygen that has accumulated on the surface to be vented through the gas outlet structure 124.
The mode can remove oxygen or adjust the oxygen concentration aiming at a specific area, the regulation and control are accurate, and the oxygen removing effect is better while the energy is saved. And because the gas filled into the storehouse is clean gas processed by the external gas source station, the oxygen concentration of the storehouse can be adjusted, the environment in the storehouse can be purified, and the cleanliness of the gas in the storehouse is improved.
In some embodiments, the air outlet structure is located at the top of the storehouse, and is further located at the joint of the top and the side wall, and vertically divides the inner space of the storehouse into a plurality of parallel parts.
In some embodiments, at a certain point of time, the oxygen concentration field calculation unit 111 acquires, for example, that the oxygen concentration is not uniform in the airtight storehouse (the highest value and the lowest value of the oxygen concentration differ by more than a threshold). The main control unit 112 turns on the internal circulation device in the oxygen control device 120.
In some embodiments, the internal circulation device is a combination of a plurality of internal circulation pipes and a plurality of gas guiding devices (e.g., fans) 195 installed on the inside of the airtight storehouse 100. And the internal circulation pipelines are arranged in the airtight storehouse or outside the airtight storehouse, and each internal circulation pipeline is communicated with at least one gas guide device. If the circulation pipeline is located outside the storehouse, the pipeline must be well sealed to prevent outside air from entering in the circulation process. When the air guide fan is started, directional circulating air can be formed inside the insecticidal storehouse, the forced circulation can promote the air mixing inside the airtight storehouse 100, and the accelerated mixing of the air can greatly improve the uniformity of the oxygen concentration in the storehouse, so that the working efficiency of the storehouse is improved, and the running cost is reduced.
In some embodiments, the internal circulation device can be started at a fixed time interval, and the step-by-step uniformity of the oxygen content in the enclosure can be accurately adjusted without detecting the oxygen concentration at each position in the airtight enclosure 100 after the internal circulation device is started, so that the oxygen control device can accurately control the uniformity of the gas in the enclosure, the oxygen control efficiency is improved, and the loss is reduced.
The utility model provides an oxygen concentration uniformity governing system can be stable for a long time keep the oxygen concentration in airtight storehouse 100 stable and even. The mode simulation data that passes through the oxygen concentration field with airtight storehouse inner space obtains accurate oxygen content data, also can realize accurate accuse oxygen work, not only can put down local oxygen content too high, can avoid unnecessary oxygen reduction work moreover, can reduce the energy consumption, can reduce the routine maintenance loss moreover.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.
Claims (10)
1. An oxygen concentration uniformity adjustment system, comprising:
the air-tight storehouse is characterized in that the top or the side wall of the air-tight storehouse is provided with an air inlet pipeline and an air outlet pipeline;
the oxygen concentration uniformity detection device is connected to the airtight storehouse and is configured to obtain an oxygen concentration field distribution state sample in the airtight storehouse; and
and the oxygen control device is connected to the airtight storehouse and is configured to adjust the oxygen concentration and the uniformity thereof in the airtight storehouse according to the distribution state of the oxygen concentration field in the airtight storehouse.
2. The oxygen concentration uniformity adjustment system according to claim 1, wherein the oxygen concentration uniformity detection means comprises:
an oxygen concentration field calculation unit configured to calculate a time-varying relation of an oxygen concentration field distribution pattern in the airtight storehouse;
and the main control unit is coupled to the oxygen concentration field calculation unit and is configured to generate corresponding control signals according to the time-varying relation of the distribution state of the oxygen concentration field and control the oxygen control device to adjust the oxygen concentration and the uniformity thereof in the airtight storehouse according to the control signals.
3. The oxygen concentration uniformity adjustment system according to claim 1, wherein the oxygen concentration uniformity detection means comprises:
the oxygen concentration detection unit comprises a plurality of oxygen concentration sensors which are uniformly arranged in the airtight storehouse;
and the control unit is coupled to the oxygen concentration detection unit and responds to the detection result of the oxygen concentration detection unit to control the oxygen control device to adjust the oxygen concentration and the uniformity of the oxygen concentration in the airtight storehouse.
4. The oxygen concentration uniformity adjustment system of claim 1, wherein the oxygen control device comprises:
the oxygen removing device is connected to the air inlet end of the air inlet pipeline and is configured to reduce the oxygen concentration in the airtight storehouse after being opened;
a gas line connected to an outlet end of the gas inlet line, disposed within the airtight storage room, configured to provide a gas path for gas entering through the gas inlet line;
and the air outlet structure is arranged on the gas pipeline and is configured to communicate the inside of the gas pipeline with the airtight storehouse.
5. The oxygen concentration uniformity conditioning system of claim 4, wherein the oxygen removal device comprises:
the gas transmission device is arranged outside the airtight storehouse;
and the gas transmission pipeline is communicated with the gas transmission device and the even-number operation gas inlet pipeline.
6. The oxygen concentration uniformity adjustment system of claim 4, wherein the oxygen control device further comprises:
and the internal circulation device is arranged in the airtight storehouse and is configured to control the directional flow of the gas in the airtight storehouse after being opened.
7. The oxygen concentration uniformity adjustment system of claim 6, wherein the internal circulation device comprises:
the gas guide devices are arranged on the side wall of the airtight storehouse and can enable gas to flow directionally;
and the internal circulation pipelines are arranged in the airtight storehouse or outside the airtight storehouse, and each internal circulation pipeline is communicated with at least one gas guide device.
8. The oxygen concentration uniformity adjusting system of claim 4, wherein the air outlet structure is a multi-directional air valve, and the multi-directional air valve can control air outlet and air outlet angle.
9. The oxygen concentration uniformity tuning system of claim 8, wherein the multi-directional gas valve is positioned away from the gas outlet line.
10. The oxygen concentration uniformity adjustment system of claim 4, wherein the outlet structure is an outlet hole, and the diameter and density of the outlet hole are inversely proportional to the distance between the outlet hole and the inlet pipeline.
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| CN202023285863.8U CN215973188U (en) | 2020-12-30 | 2020-12-30 | Oxygen concentration uniformity adjusting system |
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| CN202023285863.8U CN215973188U (en) | 2020-12-30 | 2020-12-30 | Oxygen concentration uniformity adjusting system |
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