Ventilation type oxygen cabin system and operation method thereof

Abstract

The invention relates to the technical field of oxygen cabins, in particular to a ventilation type oxygen cabin system which comprises a pressure tank, an air inlet of the pressure tank is connected with an air outlet of an air compressor, a pressure release valve and an air outlet pressure sensor are arranged on the pressure tank, and the air outlet pressure sensor is used for detecting the pressure of the air outlet end of the air compressor. A plurality of air inlet electromagnetic valves are connected in parallel between an outlet of the pressure tank and an inlet of the oxygen cabin, a protective valve and an in-cabin pressure sensor are arranged on the oxygen cabin, an electronic flow meter communicated with air is arranged on one side of the oxygen cabin, and a plurality of exhaust electromagnetic valves are connected in parallel between an exhaust port of the oxygen cabin and the electronic flow meter. According to the ventilation type oxygen cabin system, through multiple innovative designs, accurate control over pressure in the cabin and efficient ventilation are achieved, safety and comfort of treatment are guaranteed, and the ventilation type oxygen cabin system has wide application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen chambers, in particular to a ventilation type oxygen chamber system. Background Art

[0002] The oxygen chamber is a special medical device for high-pressure oxygen therapy. Its principle is to place the user in an oxygen-rich environment with a pressure higher than normal atmospheric pressure. Under the action of high pressure, oxygen is input into the respiratory and microcirculatory systems to reach various organs of the human body, increasing the level of arterial oxygen partial pressure and oxygen saturation to promote human metabolism. During the use of the oxygen chamber, attention should be paid to controlling the accumulation of carbon dioxide to avoid health damage to the user.

[0003] At present, the commonly used oxygen cabin systems are divided into two types of oxygen inhalation methods: oxygen inhalation with a dedicated oxygen mask and natural oxygen inhalation. Among them, the dedicated oxygen mask is designed with a large-caliber inlet and outlet trachea. The mask forms an independent closed space in the mouth and nose area by buckling the user's mouth and nose. When inhaling oxygen in the cabin, a large flow of pure oxygen is introduced into the air inlet end, and the exhaust waste is discharged out of the cabin through the exhaust pipe, thereby achieving continuous high-concentration oxygen inhalation. In this way, all the exhaust gas exhaled by the user is directly discharged out of the cabin, avoiding the problem of carbon dioxide concentration accumulation in the cabin. However, it has the disadvantages of large size of oxygen masks and many pipes, which are inconvenient to use. It also has the disadvantage of requiring a high oxygen flow rate and is not suitable for non-medical scenarios. Natural oxygen inhalation is to deliver high-concentration oxygen with a lower flow rate to the user's nasal cavity through an open nasal oxygen cannula or oxygen headset. When the user inhales oxygen, he can naturally inhale oxygen and a part of the cabin air, thereby achieving a relatively good treatment effect. The advantage of this method is that it is easy to use and a small oxygen production system can provide oxygen, but it has the risk of carbon dioxide accumulation. Specifically, during the pressurization process, general oxygen chambers often only allow air to enter and fully pressurize, without exhaust. This will result in no gas circulation in the chamber during the pressurization process, and the carbon dioxide exhaled by the user will be completely discharged and accumulated in the chamber. When the pressure in the chamber rises to the point where the pressure begins to be relieved, gas will be discharged. At this time, the intake and exhaust are balanced, but due to the accumulation of carbon dioxide caused by the previous pressurization process, the carbon dioxide concentration in the chamber is always at a high level. During the depressurization process, the intake valve is usually closed. At this time, only exhaust is used to release the pressure. No fresh air enters the chamber, and gas exchange cannot be achieved, which will also cause carbon dioxide accumulation. Summary of the invention

[0004] In order to solve the above technical problems, the present invention specifically adopts the following technical solutions.

[0005] A ventilation oxygen chamber system is designed, comprising a pressure tank, wherein the air inlet of the pressure tank is connected to the air outlet of an air compressor, a pressure relief valve and an air outlet pressure sensor are arranged on the pressure tank, the air outlet pressure sensor is used to detect the pressure at the air outlet of the air compressor, a plurality of air inlet solenoid valves are connected in parallel between the outlet of the pressure tank and the inlet of the oxygen chamber, a protection valve and an in-cabin pressure sensor are arranged on the oxygen chamber, an electronic flow meter connected to the air is arranged on one side of the oxygen chamber, and a plurality of exhaust solenoid valves are connected in parallel between the exhaust port of the oxygen chamber and the electronic flow meter.

[0006] Preferably, the pressure relief pressure of the pressure relief valve is lower than the pressure of the air compressor protection valve.

[0007] A method for operating a ventilated oxygen chamber system comprises the following steps:

[0008] S1: When the user enters the oxygen chamber to start treatment, all air inlet solenoid valves are opened, all exhaust solenoid valves are closed, and the air compressor is turned on to inject air into the oxygen chamber through the pressure tank for pressurization;

[0009] S2: When the pressure in the cabin rises to 1KPA, several exhaust solenoid valves are opened one by one until the electronic flow meter detects that the exhaust flow rate of the oxygen cabin is greater than 60L / min;

[0010] S3: As the pressure in the cabin increases, it can be seen from the air compressor pressure flow curve that the air compressor outlet flow rate will decrease. During this process, if it is detected that the exhaust flow rate of the oxygen cabin is less than 60L / min, several exhaust solenoid valves will continue to be opened in sequence until the exhaust flow rate is greater than 60L / min;

[0011] S4: When the pressure in the cabin continues to rise, several exhaust solenoid valves are opened in sequence until the pressure in the cabin reaches the set value and tends to be stable. At this time, if the pressure in the cabin begins to drop, all opened exhaust solenoid valves are closed to stabilize the pressure in the cabin within the set value range, thereby achieving pressure stabilization treatment;

[0012] S5: After the treatment is completed, the air compressor continues to supply air to the oxygen chamber. At this time, all exhaust solenoid valves are opened and the oxygen chamber begins to reduce the pressure. When the exhaust speed in the cabin is detected to be lower than 60L / min, it means that the air circulation in the cabin is not smooth, and an exit alarm is provided to remind the user to exit the cabin as soon as possible.

[0013] Preferably, in step S2, the air compressor output flow rate under normal pressure is greater than 60 L / min, at which time a portion of the air pressurizes the interior of the oxygen chamber, and another portion of the air greater than 60 L / min is discharged to the outside of the oxygen chamber.

[0014] Preferably, in step S5, when the oxygen chamber is depressurized, if the pressure reduction rate of the cabin pressure is too fast, the exhaust solenoid valve is gradually closed until the pressure reduction rate is appropriate. As the cabin pressure decreases, the pressure reduction rate slows down, and the pressure reduction rate is increased by opening the exhaust solenoid valves in sequence until all the exhaust solenoid valves are opened; when the pressure reduction rate continues to slow down, the intake solenoid valve is gradually closed to increase the pressure reduction rate until all the intake solenoid valves are closed, so that the cabin pressure continues to drop.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention realizes precise control of the pressure in the oxygen chamber by respectively arranging a plurality of air inlet solenoid valves and exhaust solenoid valves at the air inlet and air outlet of the oxygen chamber, and combining the pressure sensor in the chamber and the electronic flow meter. In particular, during the treatment process, the pressure in the chamber can be stabilized within a certain range, ensuring the treatment effect and the safety of the user.

[0017] 2. The present invention realizes continuous ventilation of the gas in the cabin by gradually opening and closing the multi-stage exhaust solenoid valve, avoiding the accumulation of carbon dioxide in the cabin. This not only improves the comfort and safety of treatment, but also prolongs the treatment time and improves the treatment effect. Moreover, the system can flexibly adjust the gas flow according to different treatment needs and cabin conditions.

[0018] 3. According to the air compressor pressure flow curve, dynamically adjust the oxygen chamber's intake and exhaust flow to ensure that the pressure in the chamber is always within the set range. When the pressure in the chamber changes, the system can respond in time and quickly adjust the gas flow to maintain stable pressure by opening or closing the corresponding solenoid valve.

[0019] 4. The air intake and exhaust speed of the present invention can be adjusted according to the user's physical condition and comfort. For example, after the treatment, the air intake solenoid valve can be gradually closed and the exhaust solenoid valve can be opened to control the slow drop of the pressure in the cabin, so as to avoid the user feeling uncomfortable due to the rapid pressure drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the pressure curve distribution of the air compressor of the present invention;

[0022] Figure 3 This is a flow chart of the oxygen chamber pressurization process during treatment;

[0023] Figure 4 This is a flow chart of the oxygen chamber depressurization process after the treatment is completed; DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] Example 1

[0026] A ventilated oxygen chamber system, such as Figure 1 As shown, it includes a pressure tank, the air inlet of the pressure tank is connected to the air outlet of the air compressor, a pressure relief valve and an outlet pressure sensor are provided on the pressure tank, the outlet pressure sensor is used to detect the pressure at the outlet of the air compressor, and can reflect the outlet flow of the air compressor in real time by comparing the pressure flow curve of the air compressor. The pressure relief pressure of the pressure relief valve is less than the pressure of the air compressor protection valve to ensure that the pressure at the outlet of the air compressor is lower than the limit pressure, thereby protecting the air compressor. Several air intake solenoid valves are connected in parallel between the outlet of the pressure tank and the inlet of the oxygen cabin, a protection valve and an in-cabin pressure sensor are provided on the oxygen cabin, an electronic flow meter connected to the air is provided on one side of the oxygen cabin, and multiple exhaust solenoid valves are connected in parallel between the exhaust port of the oxygen cabin and the electronic flow meter.

[0027] Example 2

[0028] A method for operating a ventilation oxygen chamber system, wherein a Figure 2 The pressure curve shown corresponds to an air compressor, with the preset oxygen chamber pressure at 100KPA, and includes the following steps:

[0029] S1: When the user enters the oxygen chamber to start treatment, all air inlet solenoid valves are opened, all exhaust solenoid valves are closed, and the air compressor is turned on to inject air into the oxygen chamber through the pressure tank for pressurization;

[0030] S2: When the cabin pressure rises to 1KPA, open the exhaust solenoid valve 1 first. Assuming that the effective diameter of the exhaust solenoid valve 1 is 1mm, then at this time, the exhaust flow rate through the electronic flow meter rises to 22 / min. Since 22L / min is less than 60L / min, continue to open the exhaust solenoid valve 2. At this time, the exhaust flow rate rises to 44L / min, which is still less than 60L / min. Continue to open the exhaust solenoid valve 3. At this time, the exhaust flow rate rises to 66L / min. At this time, the exhaust flow rate is greater than 60L / min, and the remaining exhaust solenoid valves are no longer opened. After that, the cabin pressure rises, and the exhaust flow rate is between 60L / min and 70L / min.

[0031] S3: As the cabin pressure increases, the pressure flow curve of the air compressor Figure 2It can be seen that the pressure at the outlet of the air compressor rises. When the pressure in the oxygen chamber rises to about 90Kpa, its actual flow rate decreases by 10L / min. At this time, the exhaust flow rate may drop below 60L / min. When the exhaust flow rate is detected to be less than 60L / min, the exhaust solenoid valve 4 is opened, and the exhaust flow rate rises to more than 60L / min again.

[0032] S4: When the pressure in the cabin continues to rise until it reaches 100Kpa, considering the fluctuation of the pressure control in the oxygen cabin, the pressure control in the oxygen cabin is set to fluctuate between 100±5Kpa. At this time, according to the air compressor pressure curve, the air compressor intake flow is about less than 140L / min, and the oxygen cabin exhaust flow is about 80L / min at this time. The oxygen cabin continues to take in air at a flow rate of about 60L / min, causing the cabin pressure to continue to rise. In order to control the cabin pressure to be stable at 100±5Kpa, the exhaust solenoid valve 5, the exhaust solenoid valve 6, and the exhaust solenoid valve 7 are continued to be opened. At this time, the exhaust flow rate rises to about 150L / min, which is greater than the air compressor intake flow rate of 140L / min, causing the cabin pressure to begin to drop. When the pressure in the cabin is detected to drop to 95Kpa, the solenoid valve 7 is closed; thereafter, the exhaust flow rate of the oxygen cabin drops to about 130L / min, which is less than the intake flow rate of 140L / min. At this time, the pressure in the cabin begins to rise again. When the pressure in the cabin is greater than 105Kpa, the solenoid valve 7 is opened, the exhaust flow rate is greater than 140L / min again, and the pressure in the cabin begins to drop again. Subsequent control is cycled according to the above logic to ensure that the pressure is stable between 100±5Kpa and achieve pressure stabilization therapy.

[0033] S5: After the treatment is completed, the air compressor continues to inflate the oxygen chamber at a flow rate of about 140L / min. Assuming that the exhaust solenoid valve is set to 10, the remaining exhaust solenoid valves 8, 9, and 10 are all opened. At this time, the exhaust flow rate will reach more than 200L / min, and the air outflow flow rate in the cabin is about 60L / min. The pressure in the cabin begins to drop. At this time, if the user feels that the pressure drop is fast, the exhaust solenoid valve 10 can be closed. The net outflow flow rate of the air in the cabin will drop to about 30L / min. At this time, if the user feels that the pressure drop speed is appropriate, the pressure will continue to drop at this rate. As the pressure in the cabin decreases, the exhaust flow rate will also decrease. When the net outflow flow rate of the air in the cabin reaches 0, the pressure in the cabin will no longer decrease. At this time, open the exhaust solenoid valve 10, the exhaust flow rate will increase again, and the pressure in the cabin will continue to decrease. As the cabin pressure decreases, the exhaust flow rate will continue to decrease. When the net outflow of cabin air reaches 0 again, the air intake solenoid valve will begin to close. Assuming that closing one air intake solenoid valve will reduce the air flow rate by 30L / min, then, as the exhaust flow rate gradually decreases, the air intake solenoid valves will be closed one by one. The air compressor intake flow rate will gradually decrease to 140L / min, 110L / min, 80L / min, and 50L / min. When the air compressor intake flow rate drops to 50L / min, the exhaust flow rate will be less than 60L / min. At this time, an exit alarm will be provided to prompt the user to quickly reduce the pressure through the manual pressure relief valve or with the cooperation of external personnel until the cabin pressure is 0. The user then exits the cabin. After that, the exit alarm ends and the treatment ends.

[0034] The above entire process of the present invention utilizes the user to achieve continuous ventilation throughout the oxygen chamber treatment, avoiding the problem of carbon dioxide accumulation in the chamber under the state of natural oxygen inhalation, and protecting the health and safety of the user. At the same time, multiple parallel air intake solenoid valves and exhaust solenoid valves are used at the air inlet and outlet of the oxygen chamber to make the air inlet and outlet volume controllable, and the pressure increase and decrease speed can be adjusted to suit the user's physical condition, thereby improving the treatment comfort.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation oxygen chamber system, characterized in that: It includes a pressure tank, the air inlet of the pressure tank is connected to the air outlet of the air compressor, a pressure relief valve and an outlet pressure sensor are arranged on the pressure tank, the outlet pressure sensor is used to detect the pressure of the air outlet of the air compressor, a plurality of air intake solenoid valves are connected in parallel between the outlet of the pressure tank and the inlet of the oxygen chamber, a protection valve and an in-cabin pressure sensor are arranged on the oxygen chamber, an electronic flow meter connected to the air is arranged on one side of the oxygen chamber, and a plurality of exhaust solenoid valves are connected in parallel between the exhaust port of the oxygen chamber and the electronic flow meter.

2. A ventilation oxygen chamber system, characterized in that: The pressure relief pressure of the pressure relief valve is less than the pressure of the air compressor protection valve.

3. An operating method of the ventilated oxygen chamber system according to claim 1, characterized in that: The following steps are involved: S1: When the user enters the oxygen chamber to start treatment, all air inlet solenoid valves are opened, all exhaust solenoid valves are closed, and the air compressor is turned on to inject air into the oxygen chamber through the pressure tank for pressurization; S2: When the pressure in the cabin rises to 1KPA, several exhaust solenoid valves are opened one by one until the electronic flow meter detects that the exhaust flow rate of the oxygen cabin is greater than 60L / min; S3: As the pressure in the cabin increases, it can be seen from the air compressor pressure flow curve that the air compressor outlet flow rate will decrease. During this process, if it is detected that the exhaust flow rate of the oxygen cabin is less than 60L / min, several exhaust solenoid valves will continue to be opened in sequence until the exhaust flow rate is greater than 60L / min; S4: When the pressure in the cabin continues to rise, several exhaust solenoid valves are opened in sequence until the pressure in the cabin reaches the set value and tends to be stable. At this time, if the pressure in the cabin begins to drop, all opened exhaust solenoid valves are closed to stabilize the pressure in the cabin within the set value range, thereby achieving pressure stabilization treatment; S5: After the treatment is completed, the air compressor continues to supply air to the oxygen chamber. At this time, all exhaust solenoid valves are opened and the oxygen chamber begins to reduce the pressure. When the exhaust speed in the cabin is detected to be lower than 60L / min, it means that the air circulation in the cabin is not smooth, and an exit alarm is provided to remind the user to exit the cabin as soon as possible.

4. The method for operating the ventilated oxygen chamber system according to claim 3, characterized in that: In step S2, the air compressor output flow rate under normal pressure is greater than 60L / min. At this time, part of the air pressurizes the inside of the oxygen chamber, and the other part of the air greater than 60L / min is discharged to the outside of the oxygen chamber.

5. The method for operating the ventilated oxygen chamber system according to claim 3, characterized in that: In step S5, when the oxygen chamber is depressurized, if the pressure reduction rate of the cabin pressure is too fast, the exhaust solenoid valve is gradually closed until the pressure reduction rate is appropriate. As the cabin pressure drops, the pressure reduction rate slows down, and the pressure reduction rate is increased by opening the exhaust solenoid valves in sequence until all the exhaust solenoid valves are opened; when the pressure reduction rate continues to slow down, the intake solenoid valve is gradually closed to increase the pressure reduction rate until all the intake solenoid valves are closed, so that the cabin pressure continues to drop.

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