A household high-flow humidification oxygen therapy instrument and an oxygen control method thereof

Abstract

The application relates to the technical field of household humidification oxygen therapy instruments, in particular to a household high-flow humidification oxygen therapy instrument, which comprises an oxygen storage chamber and a plurality of switch valves arranged on a flow path, the flow path comprises a first connecting flow path, a second connecting flow path and a third connecting flow path; the oxygen storage chamber is connected with an oxygen generator through the first connecting flow path, a first switch valve is arranged on the first connecting flow path, an air release valve in communication with air is further arranged on the first connecting flow path, the oxygen storage chamber is connected with a turbine through the second connecting flow path, a second switch valve is arranged on the second connecting flow path, the second connecting flow path is in communication with air through a connecting pipeline, and the turbine is connected with a use terminal through the third connecting flow path; the household high-flow humidification oxygen therapy instrument provided by the application releases stored oxygen when a patient inhales, and stores oxygen when the patient exhales, so that the oxygen concentration actually inhaled by the patient is effectively improved, the blood oxygen index of the patient is improved, the use requirement of the patient is met, and a better treatment effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of home humidified oxygen therapy devices, and in particular to a home high-flow humidified oxygen therapy device and its oxygen control method. Background Technology

[0002] Respiratory support technology is an important means of treating respiratory failure. High-flow nasal cannula (HFNC) is a novel respiratory support technology that delivers humidified gas at a flow rate of 30-60 L / min or higher via a nasal cannula. This achieves the goals of delivering a stable concentration of oxygen, flushing dead space in the upper airway, and generating positive end-expiratory airway pressure, while also being well-tolerated by patients. Currently, high-flow humidifiers are mainly medical-grade products. For patients with milder symptoms, hospitalization can be costly and consume unnecessary medical resources. Therefore, home-use high-flow humidifiers represent a market trend and will increasingly serve home-based customers.

[0003] For home-use high-flow humidified oxygen therapy devices, oxygen therapy is a crucial function. It involves delivering warm, humidified gas containing a certain concentration of oxygen to the patient to increase their blood oxygen levels, thereby achieving a therapeutic effect. Therefore, appropriate oxygen concentration control modes and methods are important criteria for evaluating the oxygen therapy function of home-use high-flow humidified oxygen therapy devices.

[0004] In existing technologies, home-use high-flow humidified oxygen therapy devices are generally connected to home oxygen concentrators for oxygen therapy. Currently, most home oxygen concentrators on the market have an oxygen flow rate of 3-5 L / min, with a maximum of only 10 L / min. Furthermore, 10 L / min concentrators are expensive and inconvenient for home users. The most commonly used flow rate setting range for home-use high-flow humidified oxygen therapy devices is 30-60 L / min, and the most commonly used oxygen concentration range for home users is 40%-60%. Within this flow rate setting range, existing home oxygen concentrators struggle to meet user needs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a home-use high-flow humidified oxygen therapy device and its oxygen control method.

[0006] To achieve the above objectives, the present invention proposes an oxygen control method for a home humidified oxygen therapy device, comprising: an oxygen storage chamber and multiple switching valves disposed on a flow path, wherein the flow path includes a first connecting flow path, a second connecting flow path, and a third connecting flow path; the oxygen storage chamber is connected to an oxygen generator through the first connecting flow path, wherein a first switching valve is disposed on the first connecting flow path, and a vent valve communicating with air is also disposed on the first connecting flow path; the oxygen storage chamber is connected to a turbine through the second connecting flow path, wherein a second switching valve is disposed on the second connecting flow path, and the second connecting flow path is communicating with air through a connecting pipe; the turbine is connected to a user terminal through the third connecting flow path.

[0007] Preferably, a humidification box is provided in the third connection flow path between the turbine and the user terminal.

[0008] Preferably, a heating pipe is also provided in the third connection flow path between the humidification box and the user terminal.

[0009] More preferably, the present invention also provides a method for controlling oxygen using the above-described home high-flow humidified oxygen therapy device, which includes the following steps:

[0010] Step S1: During exhalation, close the second switch valve and the vent valve, open the first switch valve to store oxygen, and let air flow into the second connecting flow path through the connecting pipe. The flow rate is temporarily supplied entirely by the air end.

[0011] Step S2: When inhaling, close the vent valve and open the first and second switch valves. The oxygen in the oxygen storage chamber flows into the user terminal through the flow path.

[0012] Preferably, in step S2, the oxygen is mixed with air at the turbine, and then flows into the user terminal after being heated and humidified by the humidification box and the heating pipe in sequence.

[0013] Preferably, in step S1, if oxygen storage is not required during exhalation, the first and second switching valves are closed, and the venting valve is opened to release the air.

[0014] Preferably, the second switch valve is closed at the inhalation trigger point to store oxygen, and the second switch valve is opened at the exhalation trigger point to release oxygen.

[0015] Preferably, when the flow rate setting of the home-use high-flow humidified oxygen therapy device is in the range of 20-60 L / min, the oxygen flow rate during inhalation is 20 L / min, and the oxygen concentration is calculated using the following formula:

[0016]

[0017] Wherein, Flow is the flow rate setting value of the home high-flow humidified oxygen therapy device; O2Flow is the oxygen flow rate during inhalation; and O2Value is the percentage of oxygen delivered.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows: The present invention provides a home-use high-flow humidified oxygen therapy device and a method for controlling oxygen in the home-use humidified oxygen therapy device. When the patient inhales, the vent valve is closed and the first and second switching valves are opened, allowing all the oxygen in the oxygen storage chamber to flow into the user terminal. When exhaling, the second switching valve and the vent valve are closed and the first switching valve is opened to store oxygen, and air and oxygen are mixed through the turbine, thereby effectively increasing the actual oxygen concentration inhaled by the patient, thereby improving the patient's blood oxygen index, meeting the patient's needs, and achieving better treatment results. Through a relatively simple and economical method, using the same oxygen generator, the actual oxygen concentration inhaled by the patient is effectively increased through optimization of the home-use high-flow humidified oxygen therapy device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a home-use high-flow humidified oxygen therapy device provided by the present invention;

[0021] Figure 2 A schematic diagram illustrating the steps of the oxygen control method for a home-use high-flow humidified oxygen therapy device provided by the present invention;

[0022] Figure 3 This is a diagram of respiratory waveforms.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1. Oxygen storage chamber; 2. First connecting flow path; 21. First switching valve; 22. Vent valve; 3. Second connecting flow path; 31. Second switching valve; 32. Connecting pipeline; 4. Third connecting flow path; 5. Oxygen generator; 6. Turbine; 7. User terminal; 8. Humidification box; 9. Heating pipe; A1. Inhalation trigger point; A2. Exhalation trigger point. Detailed Implementation

[0025] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] This invention provides a home-use high-flow humidified oxygen therapy device, such as... Figure 1 and Figure 2 As shown, it includes an oxygen storage chamber 1 and multiple switching valves disposed on the flow path. The flow path includes a first connecting flow path 2, a second connecting flow path 3, and a third connecting flow path 4. The oxygen storage chamber 1 is connected to an oxygen generator 5 through the first connecting flow path 2. The first connecting flow path 2 is provided with a first switching valve 21 and a vent valve 22 that communicates with air. The oxygen storage chamber 1 is connected to a turbine 6 through the second connecting flow path 3. The second connecting flow path 3 is provided with a second switching valve 31 and communicates with air through a connecting pipe 32. The turbine 6 is connected to a user terminal 7 through the third connecting flow path 4. The present invention provides a home-use high-flow humidified oxygen therapy device and a method for controlling oxygen in the device. The device releases stored oxygen during inhalation and stores oxygen during exhalation, and mixes air and oxygen at the turbine 6, thereby effectively increasing the actual oxygen concentration inhaled by the patient, thus improving the patient's blood oxygen saturation and meeting the patient's needs for better treatment. Through a relatively simple and economical method, using the same oxygen generator 5, the optimization of the home-use high-flow humidified oxygen therapy device effectively increases the actual oxygen concentration inhaled by the patient.

[0030] Preferably, a humidification box 8 is provided on the third connection flow path 4 between the turbine 6 and the user terminal 7; a heating pipe 9 is also provided on the third connection flow path 4 between the humidification box 8 and the user terminal 7; by setting the humidification box 8 and the heating pipe 9 to humidify and heat the oxygen, the user experience is enhanced and a better therapeutic effect is achieved. The home high-flow humidified oxygen therapy device provided by the present invention relies on the oxygen generator 5 to supply oxygen. The oxygen is combined with the air output by the home high-flow humidified oxygen therapy device and then supplied to the patient. In the structure of the home high-flow humidified oxygen therapy device, the present invention adds an oxygen storage chamber 1 and a switching valve for the storage and release of oxygen.

[0031] More preferably, the present invention also provides a method for controlling oxygen using the above-described home-use high-flow humidified oxygen therapy device, such as... Figure 2 As shown, it includes the following steps:

[0032] Step S1: During exhalation, close the second switch valve 31 and the vent valve 22, open the first switch valve 21 to store oxygen, and let air flow into the second connecting flow path 3 through the connecting pipe 32. The flow rate is temporarily supplied entirely by the air end.

[0033] Step S2: When inhaling, close the vent valve 22 and open the first switch valve 21 and the second switch valve 31. All the oxygen in the oxygen storage chamber 1 flows into the user terminal 7 through the flow path.

[0034] Because patients do not inhale an air-oxygen mixture during exhalation, but only during inhalation, the second switch valve 31 and the vent valve 22 are closed during exhalation, while the first switch valve 21 is opened, temporarily supplying the machine's flow entirely from the air supply. During inhalation, the vent valve 22 is closed, while the first switch valve 21 and the second switch valve 31 are opened, releasing all the oxygen from the oxygen storage chamber 1 into the turbine 6. At the turbine 6, the oxygen is mixed with air, heated, and humidified, then flows into the user terminal 7 to be supplied to the patient. If less oxygen storage is needed during exhalation, the first switch valve 21 and the second switch valve 31 can be closed, and the vent valve 22 can be opened to release the oxygen. If no release is needed, the vent valve 22 and the first switch valve 21 can be omitted, and only the second switch valve 31 needs to be used. This allows for storing oxygen during exhalation and releasing it during inhalation, thus increasing oxygen storage. In general, the inspiratory-to-expiratory ratio (IRR) of a patient is less than or equal to 1, meaning the expiratory duration is longer than the inspiratory duration. This better meets the oxygen storage needs during the expiratory phase. Accurately calculating the patient's inspiratory and expiratory durations, using the inspiratory duration of the previous cycle as the oxygen storage duration during expiration, can accommodate the time required for valve activation at the beginning of expiration.

[0035] Generally, the second switch valve 31 is closed at the end of inspiration (inspiratory trigger point A1) to store oxygen, and opened at the end of expiration (expiratory trigger point A2) to release oxygen. The waveform is shown below. Figure 3 As shown.

[0036] Preferably, in step S2, the oxygen is mixed with air at the turbine 6, and then flows into the user terminal 7 after being heated and humidified by the humidification box 8 and the heating pipe 9.

[0037] Preferably, in step S1, if excessive oxygen storage is not required during exhalation, the first switch valve 21 and the second switch valve 31 are closed, and the vent valve 22 is opened to release the air.

[0038] Preferably, the second switch valve 31 is closed at the inhalation trigger point A1 to store oxygen, and the second switch valve 31 is opened at the exhalation trigger point A2 to release oxygen.

[0039] Preferably, when the flow rate setting of the home-use high-flow humidified oxygen therapy device is in the range of 20-60 L / min, the oxygen flow rate during inhalation is 20 L / min, and the oxygen concentration is calculated using the following formula:

[0040]

[0041] Wherein, Flow is the flow rate setting value of the home high-flow humidified oxygen therapy device; O2Flow is the oxygen flow rate during inhalation; and O2Value is the percentage of oxygen delivered.

[0042] Taking the maximum flow rate of a 10L oxygen concentrator 5 as an example, when the flow rate setting of a home high-flow humidified oxygen therapy device is less than or equal to 10L / Min, it can meet 100% of the oxygen concentration setting (theoretical value), specifically based on the output oxygen concentration of the oxygen concentrator 5. When the flow rate setting of the home high-flow humidified oxygen therapy device is in the range of 10-20L / Min, taking an inspiratory-to-expiratory ratio of 1:1 as an example, using the method of this invention for oxygen storage, theoretically, the oxygen flow rate during inhalation can reach 20L / Min, which can also meet 100% of the oxygen concentration setting (theoretical value), specifically based on the output oxygen concentration of the oxygen concentrator 5. When the flow rate setting of the home high-flow humidified oxygen therapy device is in the range of 20-60L / Min, the oxygen flow rate during inhalation reaches 20L / Min, calculated using the following oxygen concentration formula:

[0043]

[0044] The theoretical calculation values ​​for flow rates greater than 20L are shown in the table below:

[0045] Machine flow rate setting (L / Min) Maximum achievable oxygen concentration (%) 30 73.6 40 60.5 50 52.6 60 47.3

[0046] The theoretical calculations are based on the introduction of 100% pure oxygen (O2Value is 100%). The actual oxygen concentration output by the oxygen concentrator 5 is generally between 90% and 95%. The actual value is slightly lower, but it can still meet the commonly used oxygen concentration range of 40% to 60% for patients. Even if the patient uses an oxygen concentrator 5 with a capacity of less than 5L, by setting up the oxygen storage chamber 1, the home humidified oxygen therapy device provided by this invention can still effectively increase the actual oxygen concentration inhaled by the patient, ensuring effective treatment and solving the problem of oxygen supply for home patients at a relatively low cost, thereby improving the patient's treatment effect.

[0047] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A home-use high-flow humidified oxygen therapy device, characterized in that, It includes an oxygen storage chamber (1) and multiple switching valves located on the flow path. The flow path includes a first connecting flow path (2), a second connecting flow path (3), and a third connecting flow path (4). The oxygen storage chamber (1) is connected to an oxygen generator (5) through the first connecting flow path (2). A first switching valve (21) is provided on the first connecting flow path (2). A vent valve (22) communicating with air is also provided on the first connecting flow path (2). The oxygen storage chamber (1) is connected to a turbine (6) through the second connecting flow path (3). A second switching valve (31) is provided on the second connecting flow path (3). The second connecting flow path (3) is connected to a turbine (6) through a second connecting flow path (3). The pipeline (32) is connected to the air, and the turbine (6) is connected to the user terminal (7) through the third connecting flow path (4); the first switching valve (21), the second switching valve (31) and the vent valve (22) are configured to: close the second switching valve (31) and the vent valve (22) and open the first switching valve (21) during exhalation so that the oxygen generator (5) fills the oxygen storage chamber (1) with oxygen; and close the vent valve (22) and open the first switching valve (21) and the second switching valve (31) during inhalation so that the oxygen storage chamber (1) releases oxygen to the turbine (6).

2. The home-use high-flow humidified oxygen therapy device according to claim 1, characterized in that, A humidification box (8) is provided on the third connection flow path (4) between the turbine (6) and the user terminal (7).

3. The home-use high-flow humidified oxygen therapy device according to claim 2, characterized in that, A heating pipe (9) is also provided on the third connection flow path (4) between the humidification box (8) and the user terminal (7).

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