Oxygen concentration adjusting device and breathing machine

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an oxygen concentration adjusting device and a breathing machine. The oxygen concentration adjusting device comprises a seat body, an adjusting piece and a Venturi valve; the seat body is provided with an oxygen inlet, an air inlet, an air outlet, a pure oxygen channel and a Venturi channel, and the Venturi channel comprises a first flow channel, a second flow channel and a third flow channel which are communicated in sequence; the venturi valve is installed in the first flow channel and the second flow channel, the oxygen inlet and the pure oxygen channel communicate with the first flow channel, the first flow channel communicates with the second flow channel through the venturi valve, the air inlet communicates with the second flow channel, the end, away from the first flow channel, of the pure oxygen channel communicates with the third flow channel, and the end, away from the second flow channel, of the third flow channel communicates with the air outlet; the adjusting piece is inserted into the pure oxygen channel and used for adjusting the opening size of the pure oxygen channel. According to the oxygen concentration adjusting device, the oxygen concentration can be adjusted, and the oxygen concentration adjusting device is simple and compact in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to an oxygen concentration regulating device and a ventilator. Background Art

[0002] A ventilator is a medical device that can replace, control or change a person's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce respiratory work consumption, and save heart reserve capacity. When a patient has carbon monoxide poisoning, a ventilator is required to output pure oxygen to the patient, and different respiratory patients require gases with different oxygen concentrations. Therefore, a ventilator needs to be integrated with output gases with different oxygen concentrations.

[0003] In the prior art, a pure oxygen output pipeline and an air-oxygen mixed gas output pipeline are integrated on the ventilator. The pure oxygen output pipeline can only output pure oxygen to the patient, and the air-oxygen mixed gas output pipeline can only output gas of a specified concentration to the patient; that is, the existing ventilator has the problem of uncontrollable oxygen concentration of the output gas. Utility Model Content

[0004] The utility model aims at the technical problem that the oxygen concentration of output gas of the ventilator in the prior art is uncontrollable, and provides an oxygen concentration regulating device and a ventilator.

[0005] In view of the above technical problems, the embodiment of the utility model provides an oxygen concentration regulating device, including a seat body, a regulating member and a venturi valve;

[0006] The seat body is provided with an oxygen inlet, an air inlet, an air outlet, a pure oxygen channel and a venturi channel, the venturi channel includes a first flow channel, a second flow channel and a third flow channel which are connected in sequence, the inner diameter of the first flow channel is larger than the inner diameter of the second flow channel close to one end of the third flow channel, the inner diameter of the second flow channel close to one end of the third flow channel is smaller than the inner diameter close to one end of the first flow channel, and the inner diameter of the third flow channel close to one end of the second flow channel is smaller than the inner diameter away from one end of the second flow channel;

[0007] The venturi valve is installed in the first flow channel and the second flow channel, the oxygen inlet and the pure oxygen channel are both connected to the first flow channel, the first flow channel is connected to the second flow channel through the venturi valve, the air inlet is connected to the second flow channel, the end of the pure oxygen channel away from the first flow channel is connected to the third flow channel, and the end of the third flow channel away from the second flow channel is connected to the air outlet;

[0008] The regulating member is inserted into the pure oxygen channel and is used to adjust the opening size of the pure oxygen channel.

[0009] Optionally, the pure oxygen channel comprises a first channel, a second channel and a third channel connected in sequence, one end of the first channel away from the second channel is connected to the first flow channel, and three ends of the third channel away from the second channel are connected to the first flow channel;

[0010] The seat body is also provided with a plug hole connected to the second channel, one end of the adjustment member passes through the plug hole and extends into the second channel, and the adjustment member is used to adjust the opening size of the pure oxygen channel by the depth of insertion into the second channel.

[0011] Optionally, an inner wall of the plug-in hole is provided with an internal thread, and the adjusting member is provided with an external thread matched with the internal thread, and the adjusting member is inserted into the plug-in hole via the internal thread and the external thread which are threadedly connected.

[0012] Optionally, the Venturi valve comprises a valve cylinder, the valve cylinder comprises a coaxially arranged straight tube and a tapered tube, the straight tube and the tapered tube are both provided with inner holes that are connected to each other, the straight tube is provided with first openings that are distributed in an annular manner and are both connected to the inner holes, and the tapered tube is provided with a second opening that is connected to the inner hole;

[0013] The straight pipe is installed in the first flow channel, and the first opening is connected to the first flow channel; the tapered pipe is installed in the second flow channel, and the inner hole is connected to the second flow channel through the second opening.

[0014] Optionally, a third opening is provided at one end of the first flow channel away from the second flow channel; the oxygen concentration regulating device further comprises a sealing plate mounted on the seat body and used to seal the third opening;

[0015] The Venturi valve also includes a first sealing ring and a second sealing ring spaced apart and sleeved on the straight pipe, the first opening is located between the first sealing ring and the second sealing ring, the first sealing ring is used to seal the gap between the first flow channel and the third opening, and the second sealing ring is used to seal the gap between the second flow channel and the third flow channel.

[0016] Optionally, the oxygen concentration regulating device further comprises a proportional valve mounted on the seat body, the oxygen inlet is connected to the first flow channel via the proportional valve, and the proportional valve is used to regulate the oxygen flow rate input from the oxygen inlet into the first flow channel.

[0017] Optionally, the oxygen concentration regulating device further comprises a filter installed in the air outlet.

[0018] Optionally, the first flow channel, the second flow channel and the third flow channel are coaxially arranged.

[0019] Optionally, the first flow channel is a cylindrical hole, and the second flow channel and the third flow channel are both tapered holes.

[0020] Another embodiment of the utility model further provides a ventilator, comprising the above-mentioned oxygen concentration regulating device.

[0021] In the utility model, when the regulating member adjusts the opening of the pure oxygen channel to the maximum, the oxygen input into the first flow channel by the oxygen inlet preferentially enters the pure oxygen channel, and the oxygen in the pure oxygen channel flows into the third flow channel, and finally flows out through the gas outlet; when the regulating member blocks the pure oxygen channel, the gas input into the first flow channel by the oxygen inlet flows into the second flow channel through the venturi valve, and the gas in the second flow channel absorbs air through the air inlet, so that the second flow channel outputs air-oxygen mixed gas to the third flow channel, and the air-oxygen mixed gas in the third flow channel is output through the gas outlet. When the regulating member is adjusted between the maximum opening and the minimum opening, the oxygen flow rate in the venturi channel and the pure oxygen channel can be controlled. Since the gas flow rate in the venturi channel can be adjusted to the amount of air absorbed by the venturi channel, the purpose of adjusting the oxygen concentration of the gas output by the oxygen concentration regulating device is achieved. In the utility model, the oxygen concentration of the oxygen concentration regulating device is adjustable, and its structure is simple, compact, and low in manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of an oxygen concentration regulating device provided by an embodiment of the utility model;

[0024] Figure 2 is a cross-sectional view of an oxygen concentration regulating device provided by an embodiment of the utility model;

[0025] Figure 3 is a cross-sectional view of the oxygen concentration regulating device provided by one embodiment of the utility model from another perspective;

[0026] Figure 4 It is a structural schematic diagram of a Venturi valve of an oxygen concentration regulating device provided in one embodiment of the utility model.

[0027] The reference numerals in the specification are as follows:

[0028] 1. Seat; 11. Oxygen inlet; 12. Air inlet; 13. Air outlet; 14. Pure oxygen channel; 141. First channel; 142. Second channel; 143. Third channel; 15. Venturi channel; 151. First flow channel; 152. Second flow channel; 153. Third flow channel; 2. Adjustment member; 3. Venturi valve; 31. Valve cylinder; 311. Straight pipe; 312. Conical pipe; 313. Inner hole; 314. First opening; 315. Second opening; 32. First sealing ring; 33. Second sealing ring; 4. Closing plate; 5. Proportional valve; 6. Filter. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0031] like Figures 1 to 3 As shown, an oxygen concentration regulating device provided by one embodiment of the utility model includes a seat body 1, a regulating member 2 and a venturi valve 3; it can be understood that the regulating member 2 includes but is not limited to a regulating valve, a plug and a regulating rod, etc., and the venturi valve 3 is a conventional technical design in the field and will not be described here.

[0032] The seat body 1 is provided with an oxygen inlet 11, an air inlet 12, an air outlet 13, a pure oxygen channel 14 and a venturi channel 15. The venturi channel 15 includes a first flow channel 151, a second flow channel 152 and a third flow channel 153 which are connected in sequence. The inner diameter of the first flow channel 151 is larger than the inner diameter of the second flow channel 152 at one end close to the third flow channel 153. The inner diameter of the second flow channel 152 at one end close to the third flow channel 153 is smaller than the inner diameter at one end close to the first flow channel 151. The inner diameter of the third flow channel 153 at one end close to the second flow channel 152 is smaller than the inner diameter at one end away from the second flow channel 152.

[0033] Preferably, the first flow channel 151, the second flow channel 152 and the third flow channel 153 are coaxially arranged; the first flow channel 151 is a cylindrical hole, and the second flow channel 152 and the third flow channel 153 are both tapered holes. It can be understood that the inner diameter of the second flow channel 152 gradually increases from one end of the third flow channel 153 toward one end of the first flow channel 151; and the inner diameter of the third flow channel 153 gradually increases from one end of the second flow channel 152 toward one end away from the second flow channel 152.

[0034] The venturi valve 3 is installed in the first flow channel 151 and the second flow channel 152, the oxygen inlet 11 and the pure oxygen channel 14 are both connected to the first flow channel 151, the first flow channel 151 is connected to the second flow channel 152 through the venturi valve 15, the air inlet 12 is connected to the second flow channel 152, the end of the pure oxygen channel 14 away from the first flow channel 151 is connected to the third flow channel 153, and the end of the third flow channel 153 away from the second flow channel 152 is connected to the gas outlet 13; it can be understood that the second flow channel 152 and the air inlet 12 can be connected through an internal channel; and due to the existence of the venturi valve 3, the gas in the first flow channel 151 preferentially flows into the pure oxygen channel 14.

[0035] The adjusting member 2 is inserted into the pure oxygen channel 14 and is used to adjust the opening size of the pure oxygen channel 14 .

[0036] Specifically, when the regulating member 2 adjusts the opening of the pure oxygen channel 14 to the maximum, the oxygen input into the first flow channel 151 by the oxygen inlet 11 preferentially enters the pure oxygen channel 14, and the oxygen in the pure oxygen channel 14 flows into the third flow channel 153, and finally flows out through the gas outlet 13; when the regulating member 2 blocks the pure oxygen channel 14, the gas input into the first flow channel 151 by the oxygen inlet 11, the gas in the first flow channel 151 flows into the second flow channel 152 through the venturi valve 3, and the gas in the second flow channel 152 will absorb air through the air inlet 12, so that the second flow channel 152 will output the air-oxygen mixed gas to the third flow channel 153, and the air-oxygen mixed gas in the third flow channel 153 is output through the gas outlet 13. When the regulating member 2 is adjusted between the maximum opening and the minimum opening, the oxygen flow in the venturi channel 15 and the pure oxygen channel 14 can be controlled. Since the gas flow in the venturi channel 15 can determine the amount of air absorbed by the venturi channel 15, the purpose of adjusting the oxygen concentration of the gas output by the oxygen concentration regulating device can be achieved. In the utility model, the oxygen concentration of the oxygen concentration regulating device is adjustable, and its structure is simple, compact, and low in manufacturing cost.

[0037] In one embodiment, if Figure 2 As shown, the pure oxygen channel 14 includes a first channel 141, a second channel 142 and a third channel 143 which are connected in sequence, an end of the first channel 141 away from the second channel 142 is connected to the first flow channel 151, and three ends of the third channel 143 away from the second channel 142 are connected to the first flow channel 151;

[0038] The seat body 1 is also provided with a plug hole connected to the second channel 142, and one end of the adjusting member 2 extends into the second channel 142 after passing through the plug hole. The adjusting member 2 is used to adjust the opening size of the pure oxygen channel 14 by the depth of insertion into the second channel 142. Preferably, the plug hole and the end of the first channel 141 away from the first flow channel 151 are coaxially arranged. It can be understood that the adjusting member 2 can be plugged into the plug hole through a threaded structure and a pressing mechanism, and the end of the adjusting member 2 away from the second channel 142 is located in the external environment.

[0039] Specifically, the extent to which the regulating member 2 extends into the second flow channel 152 is used to adjust the opening size of the second flow channel 152, thereby adjusting the opening size of the pure oxygen channel 14. In this embodiment, the oxygen concentration regulating device has a simple structure and low manufacturing cost.

[0040] In one embodiment, if Figure 2 As shown, the inner wall of the plug hole is provided with an internal thread, the adjusting member 2 is provided with an external thread adapted to the internal thread, and the adjusting member 2 is inserted into the plug hole through the internal thread and the external thread connected by threads. It can be understood that by rotating the adjusting member 2, the purpose of adjusting the opening size of the second channel 142 can be achieved. In this embodiment, the oxygen concentration adjusting device has a simple structure, convenient adjustment, and low manufacturing cost.

[0041] In one embodiment, if Figure 3 and Figure 4 As shown, the venturi valve 3 includes a valve cylinder 31, and the valve cylinder 31 includes a coaxially arranged straight tube 311 and a tapered tube 312, and the straight tube 311 and the tapered tube 312 are both provided with inner holes 313 that are connected to each other, and the straight tube 311 is provided with first openings 314 that are distributed in an annular manner and are connected to the inner holes 313, and the tapered tube 312 is provided with a second opening 315 that is connected to the inner hole 313; it can be understood that the straight tube 311 and the tapered tube 312 are an integrally formed part, the inner hole 313 in the straight tube 311 is a cylindrical hole, and the inner hole 313 in the tapered tube 312 is a tapered hole, and the inner diameter of the inner hole 313 in the tapered tube 312 gradually decreases from one end of the straight tube 311 toward the end away from the straight tube 311.

[0042] The straight tube 311 is installed in the first flow channel 151, and the first opening 314 is connected to the first flow channel 151; the tapered tube 312 is installed in the second flow channel 152, and the inner hole 313 is connected to the second flow channel 152 through the second opening 315. It can be understood that the oxygen inlet 11 is connected to the pure oxygen channel 14 through the first flow channel 151, and the pure oxygen channel 14 is connected to the second flow channel 152 through the first flow channel 151, the first opening 314, the inner hole 313 and the second opening 315 in sequence. In this embodiment, the specific structural design of the valve cylinder 31 allows the gas in the first flow channel 151 to flow into the pure oxygen channel 14 preferentially, and the venturi valve 3 has a simple structure and low manufacturing cost.

[0043] In one embodiment, if Figure 3 and Figure 4 As shown, a third opening is provided at one end of the first flow channel 151 away from the second flow channel 152; the oxygen concentration regulating device also includes a sealing plate 4 installed on the seat body 1 and blocking the third opening; it can be understood that the valve cylinder 31 can be installed in the first flow channel 151 and the second flow channel 152 through the third opening, and the sealing plate 4 is installed on the outer wall of the seat body 1.

[0044] The venturi valve 3 further includes a first sealing ring 32 and a second sealing ring 33 which are sleeved on the straight pipe 311 at intervals, the first opening 314 is located between the first sealing ring 32 and the second sealing ring 33, the first sealing ring 32 is used to seal the gap between the first flow channel 151 and the third opening, and the second sealing ring 33 is used to seal the gap between the second flow channel 152 and the third flow channel 153. It can be understood that both the first sealing ring 32 and the second sealing ring 33 abut against the inner wall of the first flow channel 151. In this embodiment, the design of the first sealing ring 32 can prevent the gas in the first flow channel 151 from leaking into the external environment through the third opening; the design of the second sealing ring 33 can prevent the gas in the first flow channel 151 from directly flowing into the second flow channel 152 without passing through the valve cylinder 31. In this embodiment, the disassembly and assembly operation of the valve cylinder 31 is simple, and the oxygen concentration regulating device has good sealing performance.

[0045] In one embodiment, if Figure 1 and Figure 2As shown, the oxygen concentration regulating device further includes a proportional valve 5 mounted on the seat body 1, the oxygen inlet 11 is connected to the first flow channel 151 through the proportional valve 5, and the proportional valve 5 is used to regulate the flow rate of oxygen inputted into the first flow channel 151 by the oxygen inlet 11. It can be understood that the proportional valve 5 can regulate the flow rate of oxygen inputted into the first flow channel 151 by the oxygen inlet 11, thereby controlling the amount of air absorbed by the venturi channel 15 through the air inlet 12, thereby achieving the purpose of regulating the oxygen concentration of the oxygen concentration regulating device.

[0046] In one embodiment, if Figure 3 As shown, the oxygen concentration regulating device further comprises a filter 6 installed in the gas outlet 13. It can be understood that the gas in the gas outlet 13 is input to the patient end through the filter 6, thereby ensuring the cleanliness of the gas input to the patient by the oxygen concentration regulating device.

[0047] Another embodiment of the utility model further provides a ventilator, comprising the above-mentioned oxygen concentration regulating device.

[0048] The above are only embodiments of the oxygen concentration regulating device of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oxygen concentration regulating device, characterized in that: It includes a seat body, an adjusting part and a Venturi valve; The seat body is provided with an oxygen inlet, an air inlet, an air outlet, a pure oxygen channel and a venturi channel, the venturi channel includes a first flow channel, a second flow channel and a third flow channel which are connected in sequence, the inner diameter of the first flow channel is larger than the inner diameter of the second flow channel close to one end of the third flow channel, the inner diameter of the second flow channel close to one end of the third flow channel is smaller than the inner diameter close to one end of the first flow channel, and the inner diameter of the third flow channel close to one end of the second flow channel is smaller than the inner diameter away from one end of the second flow channel; The venturi valve is installed in the first flow channel and the second flow channel, the oxygen inlet and the pure oxygen channel are both connected to the first flow channel, the first flow channel is connected to the second flow channel through the venturi valve, the air inlet is connected to the second flow channel, the end of the pure oxygen channel away from the first flow channel is connected to the third flow channel, and the end of the third flow channel away from the second flow channel is connected to the air outlet; The regulating member is inserted into the pure oxygen channel and is used to adjust the opening size of the pure oxygen channel.

2. The oxygen concentration adjusting device according to claim 1, characterized in that: The pure oxygen channel comprises a first channel, a second channel and a third channel which are connected in sequence, wherein one end of the first channel away from the second channel is connected to the first flow channel, and three ends of the third channel away from the second channel are connected to the first flow channel; The seat body is also provided with a plug hole connected to the second channel, one end of the adjustment member passes through the plug hole and extends into the second channel, and the adjustment member is used to adjust the opening size of the pure oxygen channel by the depth of insertion into the second channel.

3. The oxygen concentration adjusting device according to claim 2, characterized in that: An inner wall of the plug-in hole is provided with an internal thread, and an external thread matching the internal thread is provided on the adjusting member. The adjusting member is inserted into the plug-in hole through the internal thread and the external thread which are threadedly connected.

4. The oxygen concentration adjusting device according to claim 1, characterized in that: The venturi valve comprises a valve cylinder, which comprises a coaxially arranged straight tube and a tapered tube, wherein the straight tube and the tapered tube are both provided with inner holes that are interconnected, the straight tube is provided with first openings that are distributed at annular intervals and are both connected to the inner holes, and the tapered tube is provided with a second opening that is connected to the inner hole; The straight pipe is installed in the first flow channel, and the first opening is connected to the first flow channel; the tapered pipe is installed in the second flow channel, and the inner hole is connected to the second flow channel through the second opening.

5. The oxygen concentration adjusting device according to claim 4, characterized in that: A third opening is provided at one end of the first flow channel away from the second flow channel; the oxygen concentration regulating device further comprises a sealing plate mounted on the seat body and used to seal the third opening; The Venturi valve also includes a first sealing ring and a second sealing ring spaced apart and sleeved on the straight pipe, the first opening is located between the first sealing ring and the second sealing ring, the first sealing ring is used to seal the gap between the first flow channel and the third opening, and the second sealing ring is used to seal the gap between the second flow channel and the third flow channel.

6. The oxygen concentration adjusting device according to claim 1, characterized in that: The oxygen concentration regulating device further comprises a proportional valve mounted on the seat body, the oxygen inlet is connected to the first flow channel through the proportional valve, and the proportional valve is used to regulate the oxygen flow rate input from the oxygen inlet into the first flow channel.

7. The oxygen concentration adjusting device according to claim 1, characterized in that: The oxygen concentration adjusting device further includes a filter installed in the air outlet.

8. The oxygen concentration adjusting device according to claim 1, characterized in that: The first flow channel, the second flow channel and the third flow channel are coaxially arranged.

9. The oxygen concentration adjusting device according to claim 1, characterized in that: The first flow channel is a cylindrical hole, and the second flow channel and the third flow channel are both tapered holes.

10. A ventilator, characterized in that: It comprises the oxygen concentration regulating device as claimed in any one of claims 1 to 9.

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