Dual Venturi air supply device and ventilator

Abstract

The present application discloses a dual-Venturi air supply device and a ventilator, wherein the dual-Venturi air supply device comprises two Venturi air supply units (100) for providing jets with different oxygen concentrations, each of the Venturi air supply units (100) comprising a Venturi flow nozzle (110) for ejecting high-pressure oxygen and a Venturi jet body (120) connected to the Venturi flow nozzle (110), and the dual-Venturi air supply device comprises an air supply channel for providing a low-pressure airflow at the connection point between the Venturi flow nozzle (110) and the Venturi jet body (120), and an output unit (200) connected to the outlets of the Venturi jet bodies (120) of the two Venturi air supply units (100). The dual-Venturi air supply device of the present application can adjust the oxygen concentration over a wider range and adapt to more situations and different groups of people.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and more specifically, to a dual-Venturi air supply device and a ventilator. Background Art

[0002] Ventilators are commonly used medical devices that typically need to provide different oxygen concentrations for different groups of people and in different ventilation modes. This requirement is even more urgent for portable emergency ventilators when used outdoors or in emergency situations.

[0003] Currently, ventilators mainly adjust oxygen concentration through a Venturi-structured oxygen mixing device, but the adjustment range is narrow and cannot provide a wider range of oxygen concentration adjustment and adaptive flow adjustment (for example, for children, it is necessary to lower the oxygen concentration than for adults and provide a small flow of high-pressure airflow).

[0004] Therefore, how to provide a wider range of oxygen concentration regulation becomes a technical problem that needs to be solved in this application. Summary of the Invention

[0005] In view of this, the present application proposes a dual-Venturi gas supply device to adjust the oxygen concentration in a wider range.

[0006] The present application provides a dual-Venturi air supply device, wherein the dual-Venturi air supply device includes two Venturi air supply units for providing jets of different oxygen concentrations, each of the Venturi air supply units includes a Venturi flow nozzle for ejecting high-pressure oxygen and a Venturi jet body connected to the Venturi flow nozzle, and the dual-Venturi air supply device includes an air supply channel for providing a low-pressure airflow at the connection point between the Venturi flow nozzle and the Venturi jet body, and an output unit connected to the outlets of the Venturi jet bodies of the two Venturi air supply units.

[0007] Optionally, the dual-Venturi air supply device is configured to controllably provide a jet to the output unit through the two Venturi air supply units respectively.

[0008] Optionally, the dual-Venturi air supply device includes an air supply channel for providing low-pressure airflow to the connection point between the Venturi flow nozzle and the Venturi jet of each Venturi air supply unit.

[0009] Optionally, the dual Venturi gas supply device includes an air source control unit and an air path control unit, the air source control unit is used to divide the high-pressure oxygen into three parts and provide them to the first inlet, the second inlet and the third inlet of the air path control unit respectively, the air path control unit includes two solenoid valves, two air-controlled valves controlled by the two solenoid valves respectively, a mixing chamber and a fourth inlet connected to the mixing chamber, the gas of the first inlet is respectively provided to the two air-controlled valves and provided to the two Venturi flow nozzles through the outlet of the air-controlled valve, the second inlet is connected to the mixing chamber to mix the air provided by the fourth inlet, the outlet of the mixing chamber is connected to the air supply channel, and the gas of the third inlet is respectively provided to the two solenoid valves to control the solenoid valves.

[0010] Optionally, a one-way valve is provided between the outlet of the air control valve and the Venturi flow nozzle.

[0011] Optionally, the gas source control unit includes a first valve seat and two proportional valves installed on the first valve seat, the first valve seat includes a first outlet and a second outlet for gas output of the two proportional valves respectively, the first outlet and the second outlet are connected to the first inlet and the second inlet respectively, and the first valve seat also includes a third outlet for connecting to the third inlet and an oxygen inlet for inputting high-pressure oxygen.

[0012] Optionally, a positioning structure is provided between the gas source control unit and the gas path control unit for sealingly aligning the first outlet, the second outlet and the third outlet with the first inlet, the second inlet and the third inlet respectively.

[0013] Optionally, the air circuit control unit includes a second valve seat for mounting the solenoid valve and the air control valve, and the first inlet, the second inlet, the third inlet, the fourth inlet and the mixing chamber are arranged on the second valve seat.

[0014] Optionally, the two Venturi flow nozzles have different injection flow rates, and the flow rate of the Venturi jet matches the corresponding Venturi flow nozzle.

[0015] The present application also provides a ventilator, wherein the ventilator includes the dual Venturi air supply device of the present application.

[0016] According to the technical solution of this application, the two Venturi air supply units can provide jets with different oxygen concentrations, allowing the oxygen concentration to be adjusted within their respective ranges through each Venturi air supply unit. Furthermore, the airflows provided by the two Venturi air supply units can be mixed through the output unit to achieve the same effect. Therefore, the dual Venturi air supply device of this application can adjust the oxygen concentration over a wider range, adapting to more situations and different groups of people.

[0017] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are used to provide a further understanding of the application, and the exemplary embodiments of the application and their descriptions are used to explain the application. In the accompanying drawings:

[0019] Figure 1 It is a perspective view of a dual-Venturi air supply device according to a preferred embodiment of the present application;

[0020] Figure 2 for Figure 1 A three-dimensional diagram of the gas source control unit;

[0021] Figure 3 for Figure 2 A three-dimensional view of the first valve seat;

[0022] Figure 4 for Figure 1 A three-dimensional diagram of the central air path control unit;

[0023] Figure 5 for Figure 4 A perspective view of the second valve seat;

[0024] Figure 6 for Figure 5 Back stereogram of

[0025] Figure 7 To display Figure 1 A three-dimensional diagram of the internal structure of the Wenqiuli air supply unit and output unit;

[0026] Figure 8 for Figure 7 A three-dimensional image of a Chinese Qiuli valve seat. DETAILED DESCRIPTION

[0027] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with the implementation methods.

[0028] According to one aspect of the present application, a dual-Venturi air supply device is provided, wherein the dual-Venturi air supply device includes two Venturi air supply units 100 for providing jets with different oxygen concentrations, each of the Venturi air supply units 100 includes a Venturi flow nozzle 110 for ejecting high-pressure oxygen and a Venturi jet body 120 connected to the Venturi flow nozzle 110, and the dual-Venturi air supply device includes an air supply channel for providing a low-pressure airflow at the connection point between the Venturi flow nozzle 110 and the Venturi jet body 120, and an output unit 200 connected to the outlets of the Venturi jet bodies 120 of the two Venturi air supply units 100.

[0029] According to another aspect of the present application, a ventilator is provided, wherein the ventilator includes the dual-Venturi air supply device of the present application.

[0030] Using the dual-Venturi air supply device and ventilator of the present application, the two Venturi air supply units 100 can provide jets with different oxygen concentrations, thereby enabling the oxygen concentration to be adjusted within its own range through each Venturi air supply unit 100. Furthermore, the airflows provided by the two Venturi air supply units 100 can be mixed through the output unit 200 to achieve the effect of adjusting the oxygen concentration. Therefore, the dual-Venturi air supply device of the present application can adjust the oxygen concentration over a wider range, adapting to more situations and different people.

[0031] Specifically, any one of the venturi air supply units 100 can be used to provide a jet flow to the output unit 200, thereby providing an airflow with an oxygen concentration and flow rate corresponding to the venturi air supply unit 100. Alternatively, two venturi air supply units 100 can be used to provide a jet flow to the output unit 200 simultaneously, so that the airflows of the two venturi air supply units 100 are mixed through the output unit 200 to obtain an airflow with an oxygen concentration and flow rate different from that provided by any single venturi air supply unit 100. Of course, it is also possible to always use one venturi air supply unit 100 to provide a jet flow to the output unit 200, and when the oxygen concentration and flow rate need to be changed, the other venturi air supply unit 100 can be turned on to provide a jet flow to the output unit 200.

[0032] In order to provide more options for parameters such as oxygen concentration and flow rate, it is preferred to selectively provide jets through two Venturi air supply units 100. Specifically, the dual Venturi air supply device can be configured to controllably provide jets to the output unit 200 through the two Venturi air supply units 100.

[0033] In the present application, the air supply channel provides a low-pressure airflow to the connection between the Venturi flow nozzle 110 and the Venturi ejector 120. Driven by the high-pressure airflow ejected from the Venturi flow nozzle 110, the low-pressure airflow enters the Venturi ejector 120 together with the high-pressure airflow to achieve the desired oxygen concentration and flow rate. The low-pressure airflow can be air or a mixture of high-pressure oxygen and air.

[0034] The two Venturi air supply units 100 can be arranged adjacent to each other and interconnected at the connection between the Venturi flow nozzle 110 and the Venturi jet 120, so that a low-pressure airflow can be provided to the two Venturi air supply units 100 through the same air supply channel. Preferably, to facilitate the provision of a jet with precisely controllable oxygen concentration and flow rate through each Venturi air supply unit 100, the dual-Venturi air supply device includes an air supply channel that provides a low-pressure airflow to the connection between the Venturi flow nozzle 110 and the Venturi jet 120 of each Venturi air supply unit 100, that is, a separate air supply channel is provided for each Venturi air supply unit 100.

[0035] In the present application, high-pressure oxygen may be provided to the Venturi flow nozzle 110 and low-pressure airflow may be provided to the air supply passage in an appropriate manner.

[0036] According to one embodiment of the present application, Figure 1 、 Figures 4 to 6 As shown, the dual-Venturi gas supply device includes an air source control unit 300 and an air circuit control unit 400. The air source control unit 300 is used to divide the high-pressure oxygen into three parts and respectively provide them to the first inlet 410, the second inlet 420 and the third inlet 430 of the air circuit control unit 400. The air circuit control unit 400 includes two solenoid valves 440, two air control valves 450 respectively controlled by the two solenoid valves 440, a mixing chamber and a fourth inlet 460 connected to the mixing chamber. The gas of the first inlet 410 is respectively provided to the two air control valves 450 and provided to the two Venturi flow nozzles 110 through the outlet of the air control valve 450. The second inlet 420 is connected to the mixing chamber to mix the air provided by the fourth inlet 460. The outlet of the mixing chamber is connected to the air supply channel. The gas of the third inlet 430 is respectively provided to the two solenoid valves 440 to control the solenoid valves 440.

[0037] During use, high-pressure oxygen is divided into three parts by the gas source control unit 300 and provided separately to the gas circuit control unit 400. The first part of the high-pressure oxygen is further divided into two parts through the first inlet 410 and provided to the two gas control valves 450. From the outlets of the two gas control valves 450, the two parts are provided to the two venturi flow nozzles 110, respectively, to provide high-pressure airflow to each venturi flow nozzle 110. The second part of the high-pressure oxygen enters the mixing chamber through the second inlet 420 and mixes with air from the fourth inlet 460 to obtain a mixed gas as a low-pressure airflow. The mixed gas is then provided through the air supply channel to the connection between the venturi flow nozzle 110 and the venturi jet 120. The third part of the high-pressure oxygen is provided to the solenoid valve 440 through the third inlet 430, serving as the control gas source for the solenoid valve 440, controlling the opening and closing of the solenoid valve 440.

[0038] Among them, the air-controlled valve 450 can include an air-controlled valve core 451, a valve cover 452 and an end face seal 453. The gas is controlled by the solenoid valve 440 to enter the cavity between the air-controlled valve core 451 and the valve cover 452, and the area difference at both ends of the air-controlled valve core 451 is used to control the switch of the air-controlled valve 450.

[0039] To prevent interference between the two Venturi air supply units 100 when used independently, which could affect the control of the oxygen concentration of the output airflow, a first one-way valve 460 is preferably provided between the outlet of the air control valve 450 and the Venturi flow nozzle 110. This allows high-pressure oxygen to flow only from the outlet of the air control valve 450 toward the corresponding Venturi flow nozzle 110 and prevents reverse flow, thus preventing interference with the other Venturi air supply unit 100 and enabling precise control of the oxygen concentration.

[0040] In this application, the gas source control unit 300 can adopt an appropriate form to divide the high-pressure oxygen into three parts. For example, Figure 2 and Figure 3 As shown, the gas source control unit 300 may include a first valve seat 310 and two proportional valves 320 mounted on the first valve seat 310. The first valve seat 310 includes a first outlet 311 and a second outlet 312 for outputting gas from the two proportional valves 320, respectively. The first outlet 311 and the second outlet 312 are connected to the first inlet 410 and the second inlet 420, respectively. The first valve seat 310 also includes a third outlet 313 for connecting to the third inlet 430 and an oxygen inlet 314 for inputting high-pressure oxygen. The first valve seat 310 is provided with corresponding air passages to allow the high-pressure oxygen inputted from the oxygen inlet 314 to enter the corresponding proportional valve 320 or outlet. The first valve seat 310 may also include maintenance holes for ventilation and sealing of the first outlet 311, the second outlet 312, and the third outlet 313, respectively.

[0041] High-pressure oxygen enters the first valve seat 310 from the oxygen inlet 314. A portion of the oxygen is output through the third outlet 313 and then provided to the solenoid valve 440 through the third inlet 430 as control air. The other portion is further divided into two portions and output through two proportional valves 320 respectively. The high-pressure oxygen output by one proportional valve 320 is further divided into two portions through the first inlet 410 and then provided to the Venturi flow nozzle 110. The high-pressure oxygen output by the other proportional valve 320 enters the mixing chamber through the second inlet 420 to mix with air to obtain a low-pressure airflow.

[0042] In addition, in order to ensure that the three parts of gas provided by the gas source control unit 300 can accurately enter the corresponding inlets of the gas circuit control unit 400 respectively, preferably, a positioning structure is provided between the gas source control unit 300 and the gas circuit control unit 400 for sealing and aligning the first outlet 311, the second outlet 312 and the third outlet 313 with the first inlet 410, the second inlet 420 and the third inlet 430 respectively. The positioning structure can be in an appropriate form to achieve precise docking between the corresponding ports. For example, the positioning structure may include a hollow column 330 and a sealing ring 340 that connect the first outlet 311, the second outlet 312 and the third outlet 313 with the first inlet 410, the second inlet 420 and the third inlet 430 respectively, and the outer periphery of the hollow column 330 is provided with a mounting groove for mounting the sealing ring 340.

[0043] Similarly, similar positioning structures P may be provided at corresponding interfaces of the air path control unit 400 and the Venturi air supply unit 100 to ensure that different air flows accurately enter the corresponding Venturi flow nozzles 110 and air supply channels.

[0044] The gas circuit control unit 400 can be configured in an appropriate manner to provide the three portions of high-pressure oxygen to corresponding locations. Specifically, the gas circuit control unit 400 can include a second valve seat 470 for mounting the solenoid valve 440 and the gas control valve 450. The first inlet 410, the second inlet 420, the third inlet 430, the fourth inlet 460, and the mixing chamber are disposed on the second valve seat 470. Corresponding air passages are provided in the second valve seat 470 to allow gases from different inlets to enter the solenoid valve 440, the mixing chamber, and the gas control valve 450.

[0045] The second valve seat 470 may be provided with a first hole 471 and a second hole 472, respectively connected to the outlets of the two air control valves 450, to connect to the two venturi flow nozzles 110. Furthermore, the second valve seat 470 may be provided with a third hole 473 and a fourth hole 474, respectively connected to the mixing chamber, to connect to the two air supply channels. The second valve seat 470 may also be provided with an exhaust hole 475 for the solenoid valve 440.

[0046] In addition, in order to provide the required gas flow for different groups of people, the injection flow rates of the two Venturi flow nozzles 110 can be different, and the flow rate of the Venturi jet 120 matches the corresponding Venturi flow nozzle 110. Specifically, Figure 7As shown, the Venturi flow nozzle 110 includes a Venturi flow nozzle 110a with a relatively high jet flow rate and a Venturi flow nozzle 110b with a relatively low jet flow rate. The Venturi jet unit 120 includes a high-flow Venturi jet unit 120a corresponding to the Venturi flow nozzle 110a with a relatively high jet flow rate and a low-flow Venturi jet unit 120b corresponding to the Venturi flow nozzle 110b with a relatively low jet flow rate. In other words, different tidal volumes can be provided by the two Venturi air supply units 100. For example, when a high tidal volume is required, the Venturi flow nozzle 110a with a relatively high jet flow rate and the high-flow Venturi jet unit 120a can provide a jet to the output unit 200. When a low tidal volume is required, the Venturi flow nozzle 110b with a relatively low jet flow rate and the low-flow Venturi jet unit 120b can provide a jet to the output unit 200.

[0047] The venturi air supply unit 100 may be in any suitable form. Preferably, two venturi air supply units 100 may be integrated. Figure 7 As shown, the dual venturi air supply device may include a venturi valve seat 500 and a venturi valve cover 600. The venturi valve seat 500 is formed with two holes for installing the venturi flow nozzle 110 and the venturi jet 120 of the venturi air supply unit 100. The two holes are arranged side by side in the venturi valve seat 500. Figure 8 As shown, the channel extends to the surface of the Venturi valve seat 500 to form a fifth hole 510 and a sixth hole 520, which respectively connect to the first hole 471 and the second hole 472 of the second valve seat 470. The Venturi valve seat 500 is also provided with a seventh hole 530 and an eighth hole 540 connected to the two air supply channels to connect to the third hole 473 and the fourth hole 474 of the second valve seat 470. The output unit 200 includes a gas manifold 210, the ports of which can cover and align with the outlet ends of the two Venturi jets 120. The ports of the gas manifold 210 and the outlet ends of the Venturi jets 120 can be sealed by a sealing gasket 220.

[0048] In addition, if Figure 8 As shown, a second one-way valve 130 can also be provided between the output unit 200 and the venturi air supply unit 100 to prevent backflow and avoid mutual interference between different venturi air supply units 100. The first one-way valve 460 and the second one-way valve 130 can be of the same form, for example, including a one-way diaphragm 131.

[0049] The use of the dual-Venturi air supply device of the present application is described below with reference to the accompanying drawings.

[0050] High-pressure oxygen enters the first valve seat 310 from the oxygen inlet 314, and a portion of it is output through the third outlet 313, and then provided to the solenoid valve 440 through the third inlet 430 as control air to control the on-off of the air paths of the two air-controlled valves 450 respectively. The other portion is further divided into two portions and output through the two proportional valves 320 respectively. The high-pressure oxygen output by one proportional valve 320 enters through the first inlet 410, and then is divided into two portions and provided to the two air-controlled valves 450 respectively, and is provided from the outlets of the two air-controlled valves 450 respectively to the two Venturi flow nozzles 110. The high-pressure oxygen output by the other proportional valve 320 enters the mixing chamber through the second inlet 420 to mix with the air entering from the third inlet 430 to obtain a low-pressure airflow.

[0051] When a high tidal volume is required, the solenoid valve 440 of the air-controlled valve 450 corresponding to the Venturi flow nozzle 110a with a larger jet flow rate is opened and the other solenoid valve 440 is closed, so as to only allow the outlet of the air-controlled valve 450 to provide high-pressure oxygen to the Venturi flow nozzle 110a with a larger jet flow rate, thereby obtaining an airflow with a high tidal volume and an oxygen concentration of the first concentration.

[0052] When low tidal volume is required, the solenoid valve 440 controlling the air-controlled valve 450 corresponding to the Venturi flow nozzle 110 b with a smaller jet flow rate is opened and the other solenoid valve 440 is closed, so as to allow only the outlet of the air-controlled valve 450 to supply high-pressure oxygen to the Venturi flow nozzle 110 b with a smaller jet flow rate, thereby obtaining an airflow with a low tidal volume and an oxygen concentration of the second concentration.

[0053] When it is necessary to provide an airflow with an oxygen concentration between the first concentration and the second concentration, the two solenoid valves 440 are opened to allow the outlets of the two air control valves 450 to respectively provide high-pressure oxygen to the corresponding Venturi flow nozzles 110. The airflows of the two oxygen concentrations are mixed at the output unit 200 to form a third concentration between the first concentration and the second concentration.

[0054] The preferred embodiments of the present application are described in detail above. However, the present application is not limited to the specific details of the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0056] In addition, the various implementation methods of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A dual venturi air supply device, characterized in that: The dual-Venturi air supply device comprises two Venturi air supply units (100) for providing jets with different oxygen concentrations, each of the Venturi air supply units (100) comprises a Venturi flow nozzle (110) for ejecting high-pressure oxygen and a Venturi jet body (120) connected to the Venturi flow nozzle (110), and the dual-Venturi air supply device comprises providing a low-pressure air flow at the connection point between the Venturi flow nozzle (110) and the Venturi jet body (120). The dual-Venturi air supply device comprises an air supply channel for supplying low-pressure airflow to the connection point between the Venturi flow nozzle (110) and the Venturi jet (120) of each of the Venturi air supply units (100); and an output unit (200) connected to the outlets of the Venturi jets (120) of the two Venturi air supply units (100). The dual-Venturi air supply device comprises an air supply channel for supplying low-pressure airflow to the connection point between the Venturi flow nozzle (110) and the Venturi jet (120) of each of the Venturi air supply units (100). The dual-Venturi air supply device comprises an air source control unit (300) and an air path control unit (400). The gas source control unit (300) is used to divide the high-pressure oxygen into three parts and respectively provide them to the first inlet (410), the second inlet (420) and the third inlet (430) of the gas circuit control unit (400). The gas circuit control unit (400) includes two solenoid valves (440), two gas control valves (450) respectively controlled by the two solenoid valves (440), a mixing chamber and a fourth inlet (460) connected to the mixing chamber. The gas of the first inlet (410) is respectively provided to the two gas control valves (450) and provided to the two Venturi flow nozzles (110) through the outlet of the gas control valve (450). The second inlet (420) is connected to the mixing chamber to mix the air provided by the fourth inlet (460). The outlet of the mixing chamber is connected to the gas supply channel. The gas of the third inlet (430) is respectively provided to the two solenoid valves (440) to control the solenoid valves (440).

2. The dual venturi air supply device according to claim 1, characterized in that: The dual-Venturi air supply device is configured to controllably provide jets to the output unit (200) through the two Venturi air supply units (100).

3. The dual venturi air supply device according to claim 1, characterized in that: A first one-way valve (460) is provided between the outlet of the air control valve (450) and the Venturi flow nozzle (110).

4. The dual venturi air supply device according to claim 1, characterized in that: The gas source control unit (300) includes a first valve seat (310) and two proportional valves (320) installed on the first valve seat (310). The first valve seat (310) includes a first outlet (311) and a second outlet (312) for respectively outputting gas from the two proportional valves (320). The first outlet (311) and the second outlet (312) are respectively connected to the first inlet (410) and the second inlet (420). The first valve seat (310) also includes a third outlet (313) for connecting to the third inlet (430) and an oxygen inlet (314) for inputting high-pressure oxygen.

5. The dual venturi air supply device according to claim 4, characterized in that: A positioning structure is provided between the gas source control unit (300) and the gas path control unit (400) for sealing and aligning the first outlet (311), the second outlet (312) and the third outlet (313) with the first inlet (410), the second inlet (420) and the third inlet (430), respectively.

6. The dual venturi air supply device according to claim 1, characterized in that: The air circuit control unit (400) comprises a second valve seat (470) for mounting the solenoid valve (440) and the air control valve (450); the first inlet (410), the second inlet (420), the third inlet (430), the fourth inlet (460) and the mixing chamber are arranged on the second valve seat (470).

7. The dual venturi air supply device according to claim 1, characterized in that: The two Venturi flow nozzles (110) have different injection flow rates, and the flow rate of the Venturi jet (120) matches the corresponding Venturi flow nozzle (110).

8. A ventilator, characterized in that: The ventilator comprises the dual Venturi air supply device according to any one of claims 1 to 7.

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