Multi-interface air source device

Abstract

The invention provides a multi-interface air source device. The multi-interface air source device comprises a sealing shell, an external air inlet formed in the sealing shell, an oxygen supply interface, an oxygen supplementation interface and a plurality of output interfaces. A premixing cavity is formed in the sealing shell, the oxygen supplementing connector and the external air inlet are both communicated with the premixing cavity, a one-way air inlet valve is arranged at the external air inlet, the premixing cavity is further connected with a suction device used for sucking external air, an air processing assembly is arranged at the external air inlet, and the premixing cavity is connected with a plurality of oxygen supply branches; a main oxygen supply pipeline communicated with the oxygen supply connectors is further arranged in the sealing shell, a gas flow distributor is arranged on the main oxygen supply pipeline, one output connector is communicated with the gas flow distributor, and the gas flow distributor is further communicated with a plurality of oxygen distribution branches. The oxygen distribution branches are communicated with the corresponding oxygen supply branches and then communicated with the remaining output connectors, and the gas flow distributors are used for adjusting the flow and / or the air-oxygen ratio of all the output connectors.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to a multi-interface gas source device. Background Art

[0002] Currently, gas source devices are key equipment in the medical field. They are used to support mobile medical services such as field emergency rescue and home ICU, and are also used to support emerging therapies such as hyperbaric oxygen chambers.

[0003] However, the current gas source device still has certain defects, as follows: First, the gas source device responds to different scenarios, and its core is the air-to-oxygen ratio. Of course, there are also scenarios where pure oxygen is used, such as cardiopulmonary resuscitation and hyperbaric oxygen therapy. Therefore, the air-to-oxygen ratio needs to be strictly controlled in different scenarios. The current air-to-oxygen ratio adjustment usually uses a Venturi tube to generate negative pressure in the throat through a contraction-expansion structure, and passively inhales external air using the pressure difference. Although the air-to-oxygen ratio can be controlled by technical means, uneven mixing will occur during mixing. For example, when the oxygen flow rate is low, which is common in low-power medical equipment, especially portable gas source devices, its turbulence intensity is insufficient, resulting in insufficient mixing, which affects oxygen therapy. In addition, when portable gas source devices are used, such as in field rescue, unstable air-to-oxygen ratios may occur in different areas due to air pressure problems. For example, in the low-pressure environment of the plateau, the Venturi tube not only reduces the mixing uniformity, but also causes sudden changes in the air-to-oxygen ratio due to changes in the oxygen content in the air in each area, and the response delay leads to instantaneous uneven mixing.

[0004] In view of this, it is necessary to improve the existing multi-interface gas source device to overcome the above-mentioned defects. Summary of the Invention

[0005] The main purpose of this application is to provide a multi-interface gas source device that not only mixes evenly but also can accurately control the air-oxygen ratio.

[0006] In order to achieve the above objectives, in a first aspect, the present application provides a multi-interface air source device, comprising a sealed housing, an external air inlet, an oxygen supply interface, an oxygen supplement interface, and a plurality of output interfaces provided on the sealed housing; A premixing chamber is provided in the sealed housing, the oxygen supply interface and the outside air inlet are both connected to the premixing chamber, a one-way air inlet valve is provided at the outside air inlet, the premixing chamber is further connected to a suction device for sucking outside air, an air processing component is provided at the outside air inlet, and the premixing chamber is connected to a plurality of oxygen supply branches; A main oxygen supply pipeline connected to the oxygen supply interface is also provided in the sealed shell, and a gas flow distributor is provided on the main oxygen supply pipeline. One of the output interfaces is connected to the gas flow distributor, and the gas flow distributor is also connected to several oxygen distribution branches. After the oxygen distribution branches are connected to the corresponding oxygen supply branches, they are respectively connected to the remaining output interfaces. The gas flow distributor is used to adjust the flow rate and / or air-oxygen ratio of each output interface.

[0007] Optionally, an electrochemical sensor for detecting the oxygen content in the outside air is provided at the outside air inlet, and a gas flow regulating valve is provided at the oxygen supplementation interface. The controller of the gas flow regulating valve adjusts the opening of the gas flow regulating valve based on the signal detected by the electrochemical sensor so that the air-oxygen ratio in the premixing chamber tends to a set value.

[0008] Optionally, a multi-stage filtration system is provided at the external air inlet.

[0009] Optionally, the multi-stage filtration system includes a primary filtration layer, a HEPA filtration layer and a chemical filtration layer arranged in sequence from the outside to the inside.

[0010] Optionally, the primary filter layer is made of metal mesh or fiber cotton, and the chemical filter layer is made of activated carbon adsorption layer.

[0011] Optionally, a temperature and humidity adjustment system is provided in the premixing chamber, and the temperature and humidity adjustment system includes a temperature sensor, a humidity sensor, a temperature control unit and a humidity control unit.

[0012] Optionally, the suction device adopts a spiral negative pressure fan.

[0013] Optionally, a spiral guide plate is further provided at the connection between the external air inlet and the premixing chamber.

[0014] Optionally, each of the output interfaces is provided with a valve and a proximity switch.

[0015] Optionally, a pressure sensor is further provided in the premixing chamber, and the pressure sensor is electrically connected to the suction device and the gas flow regulating valve.

[0016] The multi-interface gas source device provided by the present invention has the following advantages compared with the prior art: in terms of the overall process, a premixing chamber is first established to premix the inhaled air with part of the oxygen to ensure the mixing uniformity; at the same time, the premixed oxygen is adjusted in real time according to the oxygen content in the air of each region, thereby ensuring that the oxygen content in the premixed gas is stable; and then the oxygen in the oxygen supply pipeline is mixed with the premixed gas through a gas flow distributor and transported to each output interface; each output interface can select a suitable air-oxygen ratio and a suitable gas flow for output according to different application scenarios, thereby not only uniform mixing but also more precise air-oxygen ratio control, thereby solving the current defect that uniform mixing and air-oxygen ratio control cannot be achieved due to regional problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings: Figure 1 It is a schematic diagram of the present invention.

[0018] Among them: 1. Sealed shell; 2. External air inlet; 3. Oxygen supplement interface; 4. Oxygen supply interface; 5. Output interface; 6. Premixing chamber; 7. Suction device; 8. Multi-stage filtration system; 9. Guide plate; 10. Gas flow distributor. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0022] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0023] Additionally, the term "plurality" shall mean two or more.

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] like Figure 1 As shown, a multi-interface air source device includes a sealed housing 1, an external air inlet 2 provided on the sealed housing 1, an oxygen supply interface 4, an oxygen supplement interface 3, and a plurality of output interfaces 5; A premixing chamber 6 is provided in the sealed housing 1, the oxygen supply interface 3 and the outside air inlet 2 are both connected to the premixing chamber 6, a one-way air inlet valve is provided at the outside air inlet 2, the premixing chamber 6 is further connected to a suction device 7 for sucking outside air, an air processing component is provided at the outside air inlet 2, and the premixing chamber 6 is connected to a plurality of oxygen supply branches; A main oxygen supply pipeline connected to the oxygen supply interface 4 is also provided in the sealed shell 1, and a gas flow distributor 10 is provided on the main oxygen supply pipeline. One of the output interfaces 5 is connected to the gas flow distributor 10, and the gas flow distributor 10 is also connected to several oxygen distribution branches. After the oxygen distribution branches are connected to the corresponding oxygen supply branches, they are respectively connected to the remaining output interfaces 5. The gas flow distributor 10 is used to adjust the flow rate and / or air-oxygen ratio of each output interface 5.

[0026] The suction device 7 is a spiral negative pressure blower, which is provided with a frequency converter and can adjust the pressure of the inhaled air.

[0027] Specific working principle: First, when working, the spiral negative pressure fan draws the air in the environment into the premixing chamber 6. Before entering the premixing chamber 6, the air is first filtered by the multi-stage filtration system 8. Specifically, the multi-stage filtration system 8 includes a primary filter layer, a HEPA filter layer and a chemical filter layer arranged in sequence from the outside to the inside, wherein: the primary filter layer adopts a metal mesh or fiber cotton, and the chemical filter layer adopts an activated carbon adsorption layer. The primary filter layer is used to filter particles ≥5μm in the air, and the HEPA filter layer intercepts PM2.5 and microorganisms. Finally, the chemical filter layer is used to adsorb SO2 or NOx, thereby making the air entering the premixing chamber 6 meet medical conditions. In addition, due to the temperature of the air in each area The temperature and dryness are different. There is also a temperature and humidity adjustment system in the premixing chamber 6, which includes a temperature sensor, a humidity sensor, a temperature control unit and a humidity control unit. The temperature sensor and the humidity sensor are used to detect the temperature and humidity of the air entering the premixing chamber 6, and then adjust the temperature and humidity according to the preset value through the temperature control unit and the humidity control unit. The temperature control unit is a heating module and a cooling module. The heating module can adopt a resistive heater or an electromagnetic induction heater, etc., and the cooling module can adopt a semiconductor cooling sheet or a compressor cooling, and the humidity control unit includes condensation dehumidification and ultrasonic humidification, etc., thereby controlling the temperature and humidity of the air to meet medical conditions.

[0028] An electrochemical sensor for detecting the oxygen content in the outside air is provided at the outside air inlet 2, and a gas flow regulating valve is provided at the oxygen supply interface 3. The controller of the gas flow regulating valve adjusts the opening of the gas flow regulating valve based on the signal detected by the electrochemical sensor so that the air-oxygen ratio in the premixing chamber 6 approaches the set value.

[0029] The oxygen content of the treated outside air is detected by the electrochemical sensor in the premixing chamber 6, and then the oxygen flow rate input into the oxygen supply interface 3 is supplemented according to the detected oxygen content. Since the volume of the premixing chamber 6 is fixed, it is only necessary to control the oxygen flow rate to achieve control of the oxygen content, thereby making the oxygen content of the mixed gas in the premixing chamber 6 stable. Moreover, the premixing chamber 6 is provided with negative pressure suction to draw in the outside air, which can be mixed with the supplemented oxygen by itself. In addition, in order to further improve the mixing effect, a spiral guide plate 9 can be further provided at the connection between the outside air inlet 2 and the premixing chamber 6. The turbulence intensity of the inhaled air can be increased under the action of the guide plate 9, thereby improving the mixing uniformity of the supplemented oxygen and air.

[0030] Finally, the mixed gas after premixing can control the air-oxygen ratio and ensure mixing uniformity. Therefore, when dealing with multiple output interfaces 5, since the application scenarios of each output interface 5 are different, different air-oxygen ratios and gas flow rates are required. Therefore, the gas flow distributor 10 set on the oxygen supply pipeline reasonably controls the flow rate of the oxygen supply, which can simultaneously meet the stable air-oxygen ratio and gas flow rate in various regions, thereby eliminating the need for complex control systems and software algorithms for adjustment, greatly reducing production costs.

[0031] In addition, when dealing with multiple output interfaces 5, a pressure sensor is further provided in the premixing chamber 6. The pressure sensor is electrically connected to the suction device 7 and the gas flow regulating valve. Since each output interface 5 does not work at the same time, the required total gas flow is not constant. Therefore, in order to prevent the gas pressure in the premixing chamber 6 from overloading, a pressure sensor is provided. The inhaled air can be controlled according to the gas flow required by the load to avoid overloading.

[0032] Finally, in order to facilitate automatic gas delivery, each of the output interfaces 5 is provided with a valve and a proximity switch, wherein the valve can be an air pressure feedback valve, and the proximity switch can be a magnetic proximity switch. When the pipe is inserted into the output interface 5, it is sensed by the proximity switch, and the automatic control valve is automatically opened to output gas.

[0033] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A multi-interface gas source device, characterized in that: It includes a sealed shell, an external air inlet, an oxygen supply interface, an oxygen supplement interface and multiple output interfaces provided on the sealed shell; A premixing chamber is provided in the sealed housing, the oxygen supply interface and the outside air inlet are both connected to the premixing chamber, a one-way air inlet valve is provided at the outside air inlet, the premixing chamber is further connected to a suction device for sucking outside air, an air processing component is provided at the outside air inlet, and the premixing chamber is connected to a plurality of oxygen supply branches; A main oxygen supply pipeline connected to the oxygen supply interface is also provided in the sealed shell, and a gas flow distributor is provided on the main oxygen supply pipeline. One of the output interfaces is connected to the gas flow distributor, and the gas flow distributor is also connected to several oxygen distribution branches. After the oxygen distribution branches are connected to the corresponding oxygen supply branches, they are respectively connected to the remaining output interfaces. The gas flow distributor is used to adjust the flow rate and / or air-oxygen ratio of each output interface.

2. The multi-port gas source device according to claim 1, characterized in that: An electrochemical sensor for detecting the oxygen content in the outside air is provided at the outside air inlet, and a gas flow regulating valve is provided at the oxygen supply interface. The controller of the gas flow regulating valve adjusts the opening of the gas flow regulating valve based on the signal detected by the electrochemical sensor so that the air-oxygen ratio in the premixing chamber tends to a set value.

3. The multi-port gas source device according to claim 1, characterized in that: A multi-stage filtering system is provided at the external air inlet.

4. The multi-port gas source device according to claim 3, characterized in that: The multi-stage filtration system includes a primary filtration layer, a HEPA filtration layer and a chemical filtration layer which are sequentially arranged from the outside to the inside.

5. The multi-port gas source device according to claim 4, characterized in that: The primary filter layer is made of metal mesh or fiber cotton, and the chemical filter layer is made of activated carbon adsorption layer.

6. The multi-port gas source device according to claim 1, characterized in that: A temperature and humidity adjustment system is provided in the premixing chamber, and the temperature and humidity adjustment system includes a temperature sensor, a humidity sensor, a temperature control unit and a humidity control unit.

7. The multi-port gas source device according to claim 1, characterized in that: The suction device adopts a spiral negative pressure fan.

8. The multi-port gas source device according to claim 1, characterized in that: A spiral guide plate is further provided at the connection between the external air inlet and the premixing chamber.

9. The multi-port gas source device according to claim 1, characterized in that: Each of the output interfaces is provided with a valve and a proximity switch.

10. The multi-port gas source device according to claim 2, characterized in that: A pressure sensor is also provided in the premixing chamber, and the pressure sensor is electrically connected to the suction device and the gas flow regulating valve.

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