Oxygen cabin pressure maintaining system
By designing pressure-keeping and pressure relief branches in the oxygen chamber equipment, combined with the on-off control of the conversion branch, rapid boosting and balance are achieved, solving the problem of oxygen leakage and boosting time, and improving the starting speed of the equipment and comfort.
Patent Information
- Application Number
- CN202421099670.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Due to the inability to achieve 100% sealing of the existing oxygen chamber equipment, oxygen leakage and pressure drop, and the oxygen production and pressure holding branches are independent, and the pressure boosting time is long, so it cannot be dynamically adjusted according to different numbers and volumes, resulting in mismatch in pressure, affecting Comfortable to use.
Design an oxygen chamber pressure-keeping system, including pressure-keeping branch, oxygen-making branch, conversion branch and pressure relief branch, control high-pressure airflow directly into the oxygen chamber through the on-off of the conversion branch, combining pressure-keeping and pressure relief Branch circuit to achieve rapid boosting and balance, use DC frequency converter and fixed frequency compressor, and cooperate with solenoid valves and sensors to dynamically adjust the oxygen concentration and pressure.
The time when the oxygen chamber reaches the set pressure is shortened, the equipment start speed is improved, the pressure balance in the chamber is maintained, the user's comfort is ensured, and the capacity of different types of chambers is adapted to different types of chambers.
Smart Images
Figure CN222130467U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to oxygen chamber equipment, in particular to an oxygen chamber pressure maintaining system. Background Art
[0002] The existing oxygen chamber is equipped with an oxygen compressor and a pressure-maintaining compressor. The oxygen concentration in the oxygen chamber is detected by an oxygen sensor, thereby controlling the start and stop of the oxygen compressor. In theory, the pressure inside the oxygen chamber will continue to increase.
[0003] In theory, the manufacturing of oxygen chambers needs to achieve a high degree of sealing to ensure that the internal gas will not leak, but the actual production process cannot achieve a 100% sealing effect. Therefore, the internal gas will gradually leak out, and the effect of exceeding the pressure increase of the oxygen compressor will cause the internal pressure of the oxygen chamber to gradually decrease. The function of the pressure-maintaining compressor is to add natural air to the oxygen chamber to maintain the internal pressure of the oxygen chamber. Since the compressors on the market can only meet a specific flow rate, the existing oxygen chambers will be used according to different numbers of people (or different volumes), and the oxygen volume produced by the oxygen compressor will be different, that is, the pressure increased by the oxygen compressor for the oxygen chamber varies according to the number of people, and the pressure-maintaining compressor is a pressure compensation device that will choose different powers according to the actual situation. Therefore, for different oxygen chambers, there are specified number of users to avoid the pressure in the oxygen chamber not reaching the required pressure due to mismatch in the number of people, thereby causing discomfort.
[0004] In addition, the oxygen production branch and the pressure-maintaining branch of the existing oxygen chamber are independent of each other, that is, after the high-pressure airflow produced by the oxygen compressor in the oxygen production branch is filtered through the molecular sieve, only a small amount of gas with a high oxygen content enters the oxygen chamber, which is equivalent to only the pressure-maintaining compressor pressurizing the oxygen chamber. It takes a long time to reach the set pressure before the machine can start working normally. Utility Model Content
[0005] In order to overcome the deficiencies of the prior art, the utility model provides an oxygen chamber pressure maintaining system.
[0006] The technical solution adopted by the utility model to solve its technical problems is:
[0007] An oxygen cabin pressure-maintaining system comprises an oxygen cabin, wherein an input end of the oxygen cabin is connected with a pressure-maintaining branch and an oxygen-generating branch, the pressure-maintaining branch comprises a pressure-maintaining compressor and a first three-way pipe, an output end of the pressure-maintaining compressor is connected with one of the air inlet ends of the first three-way pipe, and an air outlet end of the first three-way pipe is connected with the oxygen cabin; the oxygen-generating branch comprises an oxygen-generating compressor, a second three-way pipe, a second solenoid valve and a molecular sieve, the output end of the oxygen-generating compressor is connected with the air inlet end of the second three-way pipe, one of the air outlet ends of the second three-way pipe is connected with the air inlet end of the molecular sieve through the second solenoid valve, and the air outlet end of the molecular sieve is connected with the oxygen cabin; the other air outlet end of the second three-way pipe is connected with the other air inlet end of the first three-way pipe through the first solenoid valve to form a conversion branch, a pressure sensor is arranged in the oxygen cabin, and a pressure relief branch is connected with the output end of the oxygen cabin.
[0008] The pressure relief branch includes a pressure relief pipe and a pressure relief valve. The pressure relief pipe is connected to the output end of the oxygen chamber, the pressure relief valve is connected to the other end of the pressure relief pipe, and the pressure relief pipe is provided with a flow sensor.
[0009] The number of the pressure relief valve is at least one.
[0010] The pressure-maintaining compressor is a DC variable-frequency compressor, and the oxygen-generating compressor is a fixed-frequency compressor.
[0011] A main board 12 is installed in the oxygen chamber 1, and the pressure sensor 9, the first solenoid valve 6, the second solenoid valve 7 and the oxygen generator 2 are electrically connected to the main board 12. The main board 12 is electrically connected to a DC drive board 14, and the DC drive board 14 is electrically connected to the pressure-maintaining compressor 3.
[0012] An oxygen concentration sensor 10 electrically connected to the main board 12 is installed in the oxygen chamber 1 .
[0013] The beneficial effects of the utility model are as follows: the utility model is provided with a pressure-maintaining branch and an oxygen-generating branch connected at the input end of the oxygen cabin, the system also includes a conversion branch and a pressure-relief branch, the output of the pressure-relief branch is equal to the sum of the inputs of the pressure-maintaining branch and the oxygen-generating branch, the cabin pressure is balanced; the air inlet end of the conversion branch is connected with the oxygen-generating branch, and the air outlet end is connected with the pressure-maintaining branch. After starting up, when the oxygen cabin has not reached the set pressure, the high-pressure airflow in the oxygen-generating branch is merged into the pressure-maintaining branch through the conversion branch to quickly pressurize the oxygen cabin. When the set pressure is reached, the conversion branch is closed to disconnect the pressure-maintaining branch and the oxygen-generating branch. The present application enables the air from the output end of the oxygen-generating compressor to directly enter the oxygen cabin through the opening and closing of the conversion branch, and quickly pressurizes the oxygen cabin together with the pressure-maintaining branch, thereby shortening the time for the oxygen cabin to reach the set pressure, so that the machine can quickly start to work normally. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0015] Figure 1 It is a principle diagram of the utility model. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
[0017] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.
[0018] Some embodiments of the present invention are described below in conjunction with the accompanying drawings.
[0019] Reference Figure 1 , an oxygen cabin pressure maintaining system, comprising an oxygen cabin 1, wherein the input end of the oxygen cabin 1 is connected with a pressure maintaining branch and an oxygen production branch, the system further comprising a conversion branch and a pressure relief branch, when the oxygen cabin is used normally, the output of the pressure relief branch is equal to the sum of the inputs of the pressure maintaining branch and the oxygen production branch, maintaining cabin pressure balance, maintaining cabin pressure balance; the air inlet end of the conversion branch is connected with the oxygen production branch, and the air outlet end is connected with the pressure maintaining branch, after startup, when the oxygen cabin 1 does not reach the set pressure, the high-pressure airflow in the oxygen production branch passes through the conversion branch and is merged into the pressure maintaining branch to quickly pressurize the oxygen cabin 1, and when the set pressure is reached, the conversion branch is closed, so that the pressure maintaining branch and the oxygen production branch are disconnected.
[0020] The high-pressure airflow in the oxygen production branch herein refers to the airflow output from the output end of the oxygen production compressor 2 that has not entered the molecular sieve 8 to participate in oxygen production. This is because after the high-pressure air passes through the molecular sieve 8, most of it is filtered out, and only a small amount of gas with a high oxygen content enters the oxygen chamber 1. If it works in a traditional way of separating the pressure-maintaining branch and the oxygen production branch, it will take a long time to reach the set pressure before the machine can start working normally. The present application converts the on-off of the conversion branch so that the air from the output end of the oxygen production compressor 2 directly enters the oxygen chamber 1, and together with the pressure-maintaining branch, the oxygen chamber 1 is quickly pressurized, thereby shortening the time for the oxygen chamber 1 to reach the set pressure, so that the machine can start working normally quickly.
[0021] The pressure-maintaining branch comprises a pressure-maintaining compressor 3 and a first three-way pipe 4, wherein the output end of the pressure-maintaining compressor 3 is connected to one of the air inlet ends of the first three-way pipe 4, and the air outlet end of the first three-way pipe 4 is connected to the oxygen chamber 1; the oxygen-generating branch comprises an oxygen-generating compressor 2, a second three-way pipe 5, a second solenoid valve 7 and a molecular sieve 8, wherein the output end of the oxygen-generating compressor 2 is connected to the air inlet end of the second three-way pipe 5, and one of the air outlet ends of the second three-way pipe 5 is connected to the air inlet end of the molecular sieve 8 through the second solenoid valve 7, and the air outlet end of the molecular sieve 8 is connected to the oxygen chamber 1; The other air outlet end of the second three-way pipe 5 is connected to the other air inlet end of the first three-way pipe 4 through the first solenoid valve 6 to form the conversion branch. A pressure sensor 9 is arranged in the oxygen cabin 1. After startup, the first solenoid valve 6 is turned on and the second solenoid valve 7 is closed. The pressure-maintaining compressor 3 and the oxygen-generating compressor 2 jointly convey air to the oxygen cabin 1 for pressurization. After the pressure sensor 9 detects that the cabin pressure reaches the set value, the first solenoid valve 6 is closed and the second solenoid valve 7 is turned on, so that the conversion branch is disconnected, the pressure-maintaining branch conveys air for pressure maintenance, and the oxygen-generating branch conveys oxygen to the oxygen cabin 1.
[0022] The pressure relief branch includes a pressure relief pipe and a pressure relief valve 11. The pressure relief valve 11 is an electronically controlled valve. The pressure relief pipe is connected to the output end of the oxygen chamber 1. The pressure relief valve 11 is connected to the other end of the pressure relief pipe. The pressure relief pipe is provided with a flow sensor 13. The opening quantity and opening degree of the pressure relief valve are controlled by the detection value of the flow sensor to maintain the pressure in the oxygen chamber 1 stable.
[0023] The number of the pressure relief valve 11 is at least one.
[0024] When the flow rate detected by the flow sensor 13 is greater than the maximum flow rate of a single pressure relief valve 11, multiple pressure relief valves 11 can be started simultaneously. All the pressure relief valves 11 can be started first. At this time, the flow rate detected by the flow sensor 13 is the maximum flow rate that needs to be relieved. Then, according to the flow rate detected by the flow sensor 13, the number and opening degree of the pressure relief valve 11 are adjusted. Generally, during the design, the actual pressure relief flow rate of the flow sensor 13 is already known. Therefore, in terms of procedure, when starting this step, only the corresponding number of pressure relief valves 11 can be started, without starting all of them, to avoid a sudden drop in pressure in the oxygen chamber 1.
[0025] The pressure-maintaining compressor 3 is a DC variable-frequency compressor, and the oxygen-generating compressor 2 is a fixed-frequency compressor.
[0026] The pressure-maintaining compressor 3 is a variable compressor, and the control system controls the working state of the pressure-maintaining compressor 3 according to the measured value of the flow sensor 13 .
[0027] The steps for using the system are as follows:
[0028] S1: The oxygen chamber 1 is started, the first solenoid valve 6 is opened, the second solenoid valve 7 is closed, the conversion branch is connected, and the pressure relief branch is closed. The pressure-maintaining compressor 3 and the oxygen compressor 2 jointly deliver air to the oxygen chamber 1 for pressurization, and the priority of pressure maintenance is higher than the priority of oxygen concentration maintenance;
[0029] S2: After the pressure sensor 9 detects that the cabin pressure reaches the set value, the first solenoid valve 6 is closed, the second solenoid valve 7 is opened, the conversion branch is closed, the pressure relief branch is closed, the speed of the pressure-maintaining compressor 3 decreases and continues to supply air to the oxygen cabin 1 to maintain the pressure, and the oxygen compressor 2 supplies natural air to the molecular sieve 8 to obtain oxygen, and supplies it to the inside of the oxygen cabin 1 until the oxygen concentration sensor 10 detects that the oxygen concentration in the oxygen cabin 1 reaches the preset value;
[0030] S3: When the pressure sensor 9 detects that the pressure in the oxygen chamber 1 reaches a safe peak value (since the pressure-maintaining compressor 3 and the oxygen-generating compressor 2 are always in the started state, even if the speed of the pressure-maintaining compressor 3 decreases and the oxygen-generating compressor 2 filters other molecules of natural air and only delivers oxygen to the oxygen chamber 1, the cabin pressure in the oxygen chamber 1 will still be in an increasing state, but the increasing speed is relatively slow), the pressure relief valve 11 is opened, the pressure relief branch is connected, the pressure in the oxygen chamber 1 is relieved, and the internal pressure balance is maintained;
[0031] S4: When the oxygen concentration and pressure in the oxygen chamber 1 reach the preset values, the first solenoid valve 6 and the second solenoid valve 7 are both closed, the oxygen production branch and the conversion branch are closed, and the pressure maintaining branch and the pressure relief branch are connected to maintain the internal pressure balance and exchange the gas inside the chamber;
[0032] S5: When the equipment stops running, the pressure-maintaining compressor 3 and the oxygen-generating compressor 2 stop, and the pressure relief valve 11 is opened to the maximum flow opening until the pressure in the oxygen chamber 1 is equal to the atmospheric pressure, and the cabin door is opened.
[0033] By switching the conversion branch on and off, the oxygen generator compressor 2 and the pressure-maintaining compressor 3 both have a pressurizing effect, thereby improving the startup time of the equipment. The pressure-maintaining compressor 3 and the pressure relief valve 11 form a dynamic pressure-maintaining system, so that the pressure in the oxygen chamber 1 can be dynamically maintained within the designed range, maintaining dynamic balance, ensuring the user's comfort, and meeting the capacity of different types of chambers.
[0034] When different numbers of people use it, the speed of oxygen production is dynamically adjusted according to the detection data of the oxygen concentration sensor 10. When the pressure in the oxygen concentration sensor 10 and the oxygen chamber 1 reaches the preset value, the oxygen production branch and the conversion branch are closed (that is, the first solenoid valve 6 and the second solenoid valve 7 are both closed), and the pressure maintaining branch and the pressure relief branch remain started to maintain the pressure balance in the oxygen chamber 1.
[0035] A main board 12 is installed in the oxygen chamber 1, and the pressure sensor 9, the oxygen concentration sensor 10, the first solenoid valve 6, the second solenoid valve 7 and the oxygen generator 2 are electrically connected to the main board 12. The main board 12 is electrically connected to a DC drive board 14, and the DC drive board 14 is electrically connected to the pressure-maintaining compressor 3. The DC drive board 14 is used to control the rotation speed of the pressure-maintaining compressor 3.
[0036] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The term "and / or" used herein includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0037] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0038] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0039] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. An oxygen chamber pressure maintaining system, comprising an oxygen chamber (1), wherein an input end of the oxygen chamber (1) is connected to a pressure maintaining branch and an oxygen production branch, Features The pressure-maintaining branch comprises a pressure-maintaining compressor (3) and a first three-way pipe (4), the output end of the pressure-maintaining compressor (3) is connected to one of the air inlet ends of the first three-way pipe (4), and the air outlet end of the first three-way pipe (4) is connected to the oxygen chamber (1); the oxygen-generating branch comprises an oxygen-generating compressor (2), a second three-way pipe (5), a second solenoid valve (7) and a molecular sieve (8), the output end of the oxygen-generating compressor (2) is connected to the air inlet end of the second three-way pipe (5), one of the air outlet ends of the second three-way pipe (5) is connected to the air inlet end of the molecular sieve (8) through the second solenoid valve (7), and the air outlet end of the molecular sieve (8) is connected to the oxygen chamber (1); the other air outlet end of the second three-way pipe (5) is connected to the other air inlet end of the first three-way pipe (4) through the first solenoid valve (6) to form a conversion branch, a pressure sensor (9) is arranged in the oxygen chamber (1), and the output end of the oxygen chamber (1) is connected to a pressure relief branch.
2. The oxygen chamber pressure maintaining system according to claim 1, Features The pressure relief branch comprises a pressure relief pipe and a pressure relief valve (11); the pressure relief pipe is connected to the output end of the oxygen chamber (1); the pressure relief valve (11) is connected to the other end of the pressure relief pipe; and the pressure relief pipe is provided with a flow sensor (13).
3. The oxygen chamber pressure maintaining system according to claim 2, Features The number of the pressure relief valve (11) is at least one.
4. The oxygen chamber pressure maintaining system according to claim 3, Features The pressure-maintaining compressor (3) is a DC variable-frequency compressor, and the oxygen-generating compressor (2) is a fixed-frequency compressor.
5. The oxygen chamber pressure maintaining system according to claim 2, Features A main board (12) is installed in the oxygen chamber (1); the pressure sensor (9), the first solenoid valve (6), the second solenoid valve (7) and the oxygen generator (2) are electrically connected to the main board (12); the main board (12) is electrically connected to a DC drive board (14); and the DC drive board (14) is electrically connected to the pressure-maintaining compressor (3).
6. The oxygen chamber pressure maintaining system according to claim 5, Features An oxygen concentration sensor (10) electrically connected to the main board 12 is installed in the oxygen chamber (1).