Air bellow, breathing system and anaesthesia machine

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to an air bellow, a respiratory system and an anaesthesia machine. The air bellow comprises a base, an air bellow cover, a fixing disc, a pressure release valve and a folding bag, the fixing disc is installed on the top side of the base, the folding bag is arranged on the fixing disc in a sleeving mode, the air bellow cover covers the folding bag and is connected with the base, and a containing cavity is defined by the air bellow cover, the folding bag and the base; a breathing channel, an air inlet channel and an air outlet channel are formed in the base, the center line of an inner end opening of the breathing channel and the center line of the base are eccentrically arranged, an inner end opening of the air inlet channel communicates with the containing cavity, and the pressure release valve is installed on the base; a circulation opening is formed in the fixing disc and located in the center line of the folding bag, and part of the circulation opening penetrates through the fixing disc so as to communicate an inner cavity of the folding bag with an inner end opening of the breathing channel. When air is blown to the folding bag from the circulation opening, the jacking force on the folding bag is centered, and the situation that the folding bag is prone to inclining or being stuck in the rising process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical equipment, especially relates to a bellows, respiratory system and anaesthesia machine. BACKGROUND

[0002] The anaesthesia machine is mainly used for providing oxygen, anaesthesia and breathing support for patients during operation. The breathing system of the anaesthesia machine, as one of the main components of the anaesthesia machine, is a combined gas path device connected with the patient, and can deliver anaesthesia mixed gas to the patient and receive the exhaled gas of the patient.

[0003] The breathing system generally uses the bellows to realize automatic ventilation. When the patient inhales, the driving gas enters the bellows and compresses the folded bag in the bellows, so as to push the gas in the folded bag to the patient through the breathing pipeline to complete the inhalation process. When the patient exhales, the exhaled gas of the patient enters the folded bag from the breathing pipeline and lifts the folded bag to complete the exhalation process.

[0004] However, the existing bellows, when the gas is blown into the folded bag, the folded bag is unevenly stressed, which causes the folded bag to be easily tilted or stuck during the lifting process. SUMMARY

[0005] The utility model solves the technical problems that, for the existing bellows, when the gas is blown into the folded bag, the folded bag is unevenly stressed, which causes the folded bag to be easily tilted or stuck during the lifting process, and provides a bellows, a breathing system and an anaesthesia machine.

[0006] To solve the above technical problems, on the one hand, the utility model embodiment provides a kind of bellows, including base, bellows cover, fixed disc, pressure relief valve and folded bag, the fixed disc is installed in the top side of the base, the folded bag is set in the fixed disc, the bellows cover is covered in the folded bag outside and is connected the base, the inner wall of the bellows cover, the outer wall of the folded bag and the base are enclosed to form containing cavity between;

[0007] Respiratory passage, gas inlet passage and gas outlet passage are arranged on the base, the center line of the inner end opening of the respiratory passage is eccentrically arranged with the center line of the base, the inner end opening of the gas inlet passage is communicated with the containing cavity, the pressure relief valve is installed on the base, the pressure relief valve can be opened when the gas pressure in the folded bag and the gas pressure in the containing cavity are unbalanced, so that the gas in the folded bag is relieved to the gas outlet passage;

[0008] Flow-through port is arranged on the fixed disc, the flow-through port is located at the center line of the folded bag, part of the flow-through port penetrates the fixed disc to communicate the inner cavity of the folded bag and the inner end opening of the respiratory passage.

[0009] Optionally, the center line of the flow passage coincides with the center line of the bellows.

[0010] Optionally, a flow guide ring is arranged on the side of the fixed disc away from the base, the center line of the flow guide ring coincides with the center line of the bellows, and the inner hole of the flow guide ring constitutes the flow passage.

[0011] Optionally, a capacity expansion groove is arranged on the fixed disc and recessed away from the base, the capacity expansion groove is in communication with the inner end opening of the breathing passage, and part of the flow passage penetrates the groove wall of the capacity expansion groove.

[0012] Optionally, a flow stabilizer is further included, the flow stabilizer is located on the side of the fixed disc away from the base, a plurality of flow stabilizer holes are arranged on the flow stabilizer and extend along the opening direction of the flow passage, and the plurality of flow stabilizer holes are arranged opposite to the flow passage.

[0013] Optionally, the flow stabilizer comprises a flow stabilizer plate, the flow stabilizer plate is arranged in parallel and spaced apart from the fixed disc, and the plurality of flow stabilizer holes are arranged on the flow stabilizer plate in a spaced apart manner.

[0014] Optionally, the flow stabilizer hole is a circular hole, the diameter of the flow stabilizer hole is d, d is 2-3 mm, and the distance between the bottom surface of the flow stabilizer plate and the top end opening of the flow passage in the opening direction of the flow passage is 2-3 mm.

[0015] Optionally, an avoiding groove is arranged on the fixed disc and recessed away from the base, the avoiding groove is used for avoiding the pressure relief valve, and the avoiding groove is in communication with the air inlet passage.

[0016] In another aspect, the utility model provides a kind of breathing system, comprising the bellows described above.

[0017] In another aspect, the utility model provides a kind of anesthesia machine, comprising the breathing system described above.

[0018] In the bellows of the utility model, the flow passage of the fixed disc is designed at the center line of the bellows, and part of the flow passage penetrates the fixed disc to connect the inner end opening of the breathing passage. While not changing the flow path of gas in the breathing passage, the gas blown to the bellows is guided to the center line of the bellows by changing the structure and position of the flow passage, so that the top force of the bellows is centered when the gas is blown to the bellows from the flow passage, reducing the situation that the bellows is easily skewed or stuck during the rising process. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure diagram of the bellows provided by an embodiment of the utility model is shown;

[0020] Figure 2 The structure diagram of the bellows provided by an embodiment of the utility model is shown;Figure 1 exploded view of the fixing disc and the base in the

[0021] Figure 3 is Figure 1 exploded view of the fixing disc and the base in the

[0022] Figure 4 is Figure 3 bottom view of the fixing disc in the

[0023] Figure 5 is Figure 1 top view of the

[0024] Figure 6 is Figure 5 A-A three-dimensional sectional view in the

[0025] Figure 7 is Figure 5 B-B three-dimensional sectional view in the

[0026] Figure 8 is Figure 5 B-B two-dimensional sectional view in the

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

[0028] 1, bellow cover; 11, containing cavity; 2, base; 21, breathing passage; 22, air inlet passage; 23, air outlet passage; 3, folding bag; 4, fixing disc; 41, flow-through port; 42, capacity expansion groove; 43, avoiding groove; 44, flow guide ring; 5, flow stabilizing plate; 51, flow stabilizing hole; 6, pressure relief valve. DETAILED DESCRIPTION

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

[0030] As Figures 1 to 3 shown in the utility model one embodiment provides a kind of bellow, including base 2, bellow cover 1, fixing disc 4, pressure relief valve 6 and folding bag 3, fixing disc 4 is installed in the top side of base 2, folding bag 3 is set in fixing disc 4, bellow cover 1 cover is set in folding bag 3 outside and is connected base 2, the inner wall of bellow cover 1, the outer wall of folding bag 3 and base 2 are enclosed and form containing cavity 11.

[0031] The base 2 is provided with a breathing channel 21, an air inlet channel 22 and an air outlet channel 23. The center line of the inner end opening of the breathing channel 21 is eccentrically set with the center line of the base 2. The inner end opening of the air inlet channel 22 is connected to the receiving cavity 11. The pressure relief valve 6 is installed on the base 2. The pressure relief valve 6 can open when there is an imbalance between the air pressure in the folded bag 3 and the air pressure in the receiving cavity 11, so that the gas in the folded bag 3 can be depressurized to the air outlet channel 23.

[0032] like Figure 3 As shown, the fixed plate 4 is provided with a flow port 41, which is located at the center line of the folded bag 3. Part of the flow port 41 penetrates the fixed plate 4 to connect the inner cavity of the folded bag 3 and the inner end opening of the breathing channel 21.

[0033] When the patient inhales, the driving gas enters the receiving cavity 11 from the air intake channel 22, compresses the folding bag 3 to push the gas in the folding bag 3 from the flow port 41 into the breathing channel 21, and delivers it to the patient to complete the exhalation process. At this time, the pressure relief valve 6 is in the closed state.

[0034] like Figures 5 to 8 As shown, when the patient exhales, the exhaled air enters the breathing channel 21 and is blown into the pleated bag 3 through the flow port 41, creating a pushing force on the pleated bag 3 and lifting it up. The air pressure inside the pleated bag 3 increases as air is blown in. When the air pressure inside the pleated bag 3 is greater than the air pressure inside the receiving cavity 11, the pressure relief valve 6 opens, allowing some of the air inside the pleated bag 3 to flow into the outlet channel 23 for pressure relief.

[0035] The base 2 is equipped with a breathing channel 21, an inlet channel 22, and an outlet channel 23, and a pressure relief valve 6 is installed. Due to limited space on the base 2, the center of the inner opening of the breathing channel 21, which is arranged to avoid the pressure relief valve 6, will deviate from the center of the base 2. In the prior art, the fixing plate 4 directly designs the flow port 41 on the fixing plate 4 to face the inner opening of the breathing channel 21, causing the center of the flow port 41 to deviate from the center of the fixing plate 4. When the gas from the breathing channel 21 blows from the flow port 41 to the pleated bladder 3, the pushing force on the pleated bladder 3 is not centered, causing the pleated bladder 3 to easily tilt or get stuck.

[0036] To address the aforementioned issues, this invention designs the flow port 41 to be located at the centerline of the folded pouch 3, with a portion of the flow port 41 penetrating the fixing plate 4 to connect to the inner opening of the breathing channel 21. Without altering the gas flow path within the respiratory tract, the structure and position of the flow port 41 are changed to direct the gas blowing towards the folded pouch 3 to its centerline. This ensures that the upward force exerted on the folded pouch 3 by the gas flowing from the flow port 41 is centered, reducing the likelihood of the folded pouch 3 tilting or becoming stuck during its ascent.

[0037] In one embodiment, such asFigure 3 and Figure 4 As shown, the fixed plate 4 is basin-shaped and includes a plate body, a plate side wall, and a plate edge. The communication port is set on the plate body. The plate body presses on the inner end opening of the breathing channel 21. The plate side wall extends towards the side of the plate body away from the base 2. The plate edge is formed by the top of the plate side wall extending horizontally outward in a radial direction.

[0038] The top of the folded capsule 3 is a closed end, and the bottom of the folded capsule 3 is an open end. The open end of the folded capsule 3 is fitted onto the edge of the disk and the side wall of the disk.

[0039] In one embodiment, such as Figure 3 As shown, the disk body is connected to the base 2 by screws.

[0040] In one embodiment, such as Figure 1 and Figure 2 As shown, the bottom end of the bellows cover 1 is snapped onto the base 2, and a sealing ring is provided between the bellows cover 1 and the base 2.

[0041] In one embodiment, such as Figure 8 As shown, the centerline of the flow port 41 coincides with the centerline of the folded bladder 3 to further improve the centrality of the top force on the folded bladder 3 when the gas is blown out of the flow port 41.

[0042] In one embodiment, such as Figure 3 and Figure 6 As shown, a flow guide ring 44 is provided on the side wall of the fixed plate 4 facing away from the base 2. The center line of the flow guide ring 44 coincides with the center line of the folded bag 3. The inner hole of the flow guide ring 44 forms a flow port 41 to increase the depth of the flow port 41, thereby improving the flow guide effect of the flow port 41 on the gas flowing out from the inner end opening of the breathing channel 21. This facilitates the gas to blow towards the folded bag 3 along the opening direction of the flow port 41, and helps the gas to lift the folded bag 3.

[0043] In one embodiment, such as Figure 4 , Figure 7 and Figure 8 As shown, the fixed plate 4 is provided with an expansion groove 42 that is recessed in the direction away from the base 2. The expansion groove 42 is connected to the inner end opening of the breathing channel 21, and part of the flow port 41 penetrates the groove wall of the expansion groove 42.

[0044] During exhalation, the gas in the breathing passage 21 flows into the expansion groove 42 from the inner end opening, and then enters the pleated sac 3 from the flow port 41 to generate a pushing force on the pleated sac 3.

[0045] During inhalation, the gas in the folded pouch 3 enters the expansion groove 42 through the flow port 41, and then flows into the breathing channel 21 through the inner end opening of the breathing channel 21.

[0046] The expansion groove 42 is arranged to increase the communication space between the communication flow port 41 and the breathing passage 21, so as to avoid the situation that the communication space between the flow port 41 and the inner end opening of the eccentrically arranged breathing passage 21 is too small and air flow resonance is easily generated.

[0047] In an embodiment, as shown in Figure 7 The flow stabilizer is arranged on the side of the fixing disc 4 away from the base 2, and a plurality of flow stabilizing holes 51 extending along the opening direction of the flow port 41 are arranged on the flow stabilizer and face the flow port 41.

[0048] When exhaling, the gas flowing out of the flow port 41 blows towards the folding bag 3 through the flow stabilizing holes 51 of the flow stabilizer, and the plurality of flow stabilizing holes 51 disperse the entire gas flow from the flow port 41 into a plurality of small gas flows, so as to make the gas flow blowing towards the folding bag 3 more uniform and stable, thereby being able to generate uniform and stable top force on the folding bag 3 under the driving of large-flow exhalation or small-flow exhalation, making the anesthesia machine run more stably and the tidal volume control more accurate.

[0049] In an embodiment, the flow stabilizer includes a flow stabilizing plate 5, which is arranged in parallel and spaced apart from the fixing disc 4, and the plurality of flow stabilizing holes 51 are arranged on the flow stabilizing plate 5 in a spaced apart manner. The flow stabilizing plate 5 has a simple structure and occupies a small space.

[0050] In an embodiment, the flow stabilizing plate 5 is provided with connecting legs on opposite sides in the horizontal direction, the connecting legs extend towards the fixing disc 4, and the connecting legs are connected to the fixing disc 4 by screws.

[0051] In an embodiment, the flow stabilizing holes 51 are circular holes, the diameter of the flow stabilizing holes 51 is d, and d is 2-3 mm. The flow stabilizing holes 51 with a diameter of 2-3 mm have a good dispersion effect on the gas blowing from the flow port 41 towards the folding bag 3.

[0052] As shown in Figure 8 In the opening direction of the flow port 41, the distance between the bottom surface of the flow stabilizing plate 5 and the top end opening of the flow port 41 is 2-3 mm.

[0053] In an embodiment, the plurality of flow stabilizing holes 51 are uniformly and spaced apart.

[0054] In other embodiments, the size, distribution of the flow stabilizing holes 51 and the distance between the flow stabilizing plate 5 and the top end opening of the flow port 41 can be adjusted according to the use requirements.

[0055] In an embodiment, the communication port is circular, the flow stabilizing plate 5 is circular, and the outer diameter of the flow stabilizing plate 5 is greater than the diameter of the communication port.

[0056] In an embodiment, as shown in Figure 8As shown, the fixing disc 4 is provided with a recessed groove 43 recessed away from the base 2, the recessed groove 43 is used for avoiding the pressure relief valve 6, and the recessed groove 43 is communicated with the air inlet channel 22.

[0057] The air inlet channel 22 is communicated with a space on one side of the pressure relief valve 6, so that part of the gas of the air inlet channel 22 acts on one side of the pressure relief valve 6, and the inner end opening of the breathing channel 21 is communicated with a space on the other side of the pressure relief valve 6, so that part of the gas of the bellows 3 acts on the other side of the pressure relief valve 6.

[0058] When the air pressure in the air inlet channel 22 is balanced with the air pressure in the bellows 3, the pressure relief valve 6 is closed to block the communication port between the inner cavity of the bellows 3 and the air outlet channel 23. When the air pressure in the bellows 3 is greater than the air pressure in the air inlet channel 22, the pressure relief valve 6 is opened, and part of the gas in the bellows 3 flows into the air outlet channel 23 and flows out to release pressure.

[0059] In an embodiment, the pressure relief valve 6 is a POP-OFF valve.

[0060] In other embodiments, the flow guide ring 44 can be cancelled, and the depth of the flow port 41 can be increased by increasing the thickness of the fixing disc 4.

[0061] In other embodiments, the flow stabilizer can include a plurality of vertical plates vertically arranged and distributed in parallel at intervals, and the intervals between adjacent vertical plates form flow holes 51.

[0062] In addition, an embodiment of the utility model provides a kind of breathing system, including the bellows of any embodiment described above.

[0063] In addition, an embodiment of the utility model provides a kind of anesthesia machine, including the breathing system described above.

[0064] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A windbox characterized by, The device comprises a base (2), a bellow cover (1), a fixing disc (4), a pressure relief valve (6) and a folding capsule (3), the fixing disc (4) is installed on the top side of the base (2), the folding capsule (3) is sleeved on the fixing disc (4), the bellow cover (1) is covered outside the folding capsule (3) and connected with the base (2), the inner wall of the bellow cover (1), the outer wall of the folding capsule (3) and the base (2) form a containing cavity (11); The base (2) is provided with a breathing channel (21), an air inlet channel (22) and an air outlet channel (23), the center line of the inner end opening of the breathing channel (21) is eccentrically arranged with the center line of the base (2), the inner end opening of the air inlet channel (22) is communicated with the containing cavity (11), the pressure relief valve (6) is installed on the base (2), the pressure relief valve (6) can be opened when the pressure in the folding capsule (3) and the pressure in the containing cavity (11) are unbalanced, so that the gas in the folding capsule (3) is discharged to the air outlet channel (23). The fixing disc (4) is provided with a flow-through port (41), the flow-through port (41) is located at the center line of the folding capsule (3), and part of the flow-through port (41) penetrates the fixing disc (4) to communicate the inner cavity of the folding capsule (3) and the inner end opening of the breathing channel (21).

2. The windbox of claim 1, wherein, The center line of the flow-through port (41) coincides with the center line of the folding capsule (3).

3. The windbox of claim 1, wherein, The side wall of the fixing disc (4) away from the base (2) is provided with a flow guide ring (44), the center line of the flow guide ring (44) coincides with the center line of the folding capsule (3), and the inner hole of the flow guide ring (44) constitutes the flow-through port (41).

4. The windbox of claim 1, wherein, The fixing disc (4) is provided with a capacity expansion groove (42) recessed away from the base (2), the capacity expansion groove (42) is communicated with the inner end opening of the breathing channel (21), and part of the flow-through port (41) penetrates the groove wall of the capacity expansion groove (42).

5. The windbox of claim 1, wherein, It also comprises a flow stabilizer, the flow stabilizer is located on the side of the fixing disc (4) away from the base (2), the flow stabilizer is provided with a plurality of flow stabilizing holes (51) extending along the opening direction of the flow-through port (41), and the plurality of flow stabilizing holes (51) are arranged opposite to the flow-through port (41).

6. The windbox of claim 5, wherein, The flow stabilizer comprises a flow stabilizing plate (5), the flow stabilizing plate (5) is arranged in parallel and spaced apart from the fixing disc (4), and a plurality of flow stabilizing holes (51) are distributed on the flow stabilizing plate (5).

7. The windbox of claim 6, wherein, The flow stabilizing hole (51) is a circular hole, the diameter of the flow stabilizing hole (51) is d, d is 2-3mm, and in the opening direction of the flow-through port (41), the distance between the bottom surface of the flow stabilizing plate (5) and the top end opening of the flow-through port (41) is 2-3mm.

8. The windbox of any one of claims 1 to 7, wherein, The fixing disc (4) is provided with a recessed groove (43) away from the base (2), the recessed groove (43) is used for avoiding the pressure relief valve (6), and the recessed groove (43) is communicated with the air inlet channel (22).

9. A breathing system, characterised in that, The bellows of any one of claims 1 to 8.

10. An anaesthesia machine characterised in that, The respiratory system of claim 9.

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