WO2022126447A1

WO2022126447A1 - Anesthesia machine bellows assembly, and anesthesia machine

Info

Publication number: WO2022126447A1
Application number: PCT/CN2020/136946
Authority: WO
Inventors: 蔡琨; 陈培涛
Original assignee: 深圳迈瑞生物医疗电子股份有限公司
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2022-06-23
Also published as: CN116490235A

Abstract

An anesthesia machine bellows assembly (9), and an anesthesia machine. The bellows assembly (9) comprises a housing (91), a silicone rubber folding bag (92), and a connecting base (93). The housing (91) has a receiving cavity. One end of the silicone rubber folding bag (92) in the height direction is an open end, and the other end of the silicone rubber folding bag (92) in the height direction is a closed end. The silicone rubber folding bag (92) is arranged in the receiving cavity. A driving gas receiving space is formed between the silicone rubber folding bag (92) and the inner wall of the receiving cavity. The connecting base (93) comprises a folding bag connecting piece (931). The connecting seat (93) is connected to the housing (91). The folding bag connecting piece (931) is located in the receiving cavity and has a sealed connection with the open end of the silicone rubber folding bag (92). By using the silicone rubber folding bag (92), the anesthesia machine bellows assembly (9) and the anesthesia machine can solve the problems in the prior art that folding bags are prone to oxidation, aging, damage and water swelling. Therefore, the silicone rubber folding bag (92) can be used reliably for a long time on the anesthesia machine, and the safety and reliability of the anesthesia machine are thus improved.

Description

Bellows components of anesthesia machine and anesthesia machine

technical field

The application relates to the technical field of medical devices, and in particular, to a bellows assembly of an anesthesia machine and an anesthesia machine.

Background technique

Anesthesia machines are mainly used to provide oxygen, anesthesia and respiratory support to patients during surgery. As one of the main components of the anesthesia machine, the breathing system of the anesthesia machine is a combined air circuit device that connects the anesthesia machine and the patient. gas exchange.

In the related art, there is a breathing system of an anesthesia machine that uses a bellows to realize automatic ventilation. When the patient inhales, the driving gas enters the bellows and passes through the folded bag in the compressed bellows, and pushes the gas in the folded bag to pass through the breathing pipeline and transport it. to the patient to complete the inspiratory procedure. When the patient exhales, the exhaled gas from the patient enters the folding bag from the breathing circuit, and the folding bag is pushed up to complete the exhalation process.

However, after a period of use, the foldable capsule in the related art will experience problems such as aging, air leakage, unstable operation, and inaccurate air supply, which will greatly affect the safety and reliability of the anesthesia machine.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present application are expected to provide a bellows assembly for an anesthesia machine and an anesthesia machine that can improve safety and reliability.

In order to achieve the above purpose, an embodiment of the present application provides a bellows assembly of an anesthesia machine, including:

A housing with an accommodating cavity;

A silicone rubber folded bag, one end of the silicone rubber folded bag in the height direction is an open end, and the opposite end of the silicone rubber folded bag in the height direction is a closed end, and the silicone rubber folded bag is arranged in the accommodating cavity , a driving gas accommodating space is formed between the silicone rubber folding bag and the inner wall of the accommodating cavity;

The connecting seat includes a folding bag connecting piece; the connecting seat is connected with the outer shell, and the folding bag connecting piece is located in the accommodating cavity and is sealingly connected with the open end of the silicone rubber folding bag.

Another embodiment of the present application provides an anesthesia machine, including an air circuit assembly and a bellows assembly, wherein the air circuit assembly includes a driving gas branch, a fresh gas branch, a patient inspiratory branch, and a patient expiratory branch; The driving gas branch is connected with the bellows assembly to deliver driving gas to the bellows assembly; the fresh gas branch is connected with the patient inspiratory branch to pass the fresh gas through the patient inspiratory branch delivered to the patient end; the patient inhalation branch is connected to the bellows assembly and the fresh gas branch to receive the fresh gas and output circulating gas to the patient end; the patient expiratory branch is connected to the The bellows assembly is connected, and when the patient end exhales, the exhaled gas enters the bellows assembly.

The bellows assembly of the anesthesia machine and the anesthesia machine according to the embodiments of the present application can solve the problems of easy oxidation, aging and damage, easy water absorption and expansion, etc. existing in the folding bag in the related art by adopting the silicone rubber folding bag, thereby making the silicone rubber foldable. The capsule can be used stably on the anesthesia machine for a long time, thereby improving the safety and reliability of the anesthesia machine.

Description of drawings

1 is a schematic diagram of the automatic ventilation of an anesthesia machine with a bellows assembly in the related art, and the thick arrows in the figure indicate the flow direction of the driving gas in the bellows assembly and the gas in the folding bag when the patient inhales;

2 is a schematic diagram of an automatic ventilation of an anesthesia machine with a bellows assembly in the related art, and the thick arrows in the figure indicate the flow direction of the driving gas in the bellows assembly and the gas in the folding bag when the patient exhales;

3 is a cross-sectional view of a bellows assembly provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of the silicone rubber folded bag shown in FIG. 3 , and the silicone rubber folded bag in the figure is in an unfolded state;

5 is a schematic structural diagram of the silicone rubber folded bag shown in FIG. 4 in a natural state;

Fig. 6 is the partial enlarged view of A place in Fig. 3;

Fig. 7 is the structural representation of the top plate shown in Fig. 3;

Fig. 8 is the structural representation of the top plate ring shown in Fig. 3;

FIG. 9 is a schematic view of the housing of the bellows assembly.

Detailed ways

It should be noted that the embodiments in this application and the technical features in the embodiments can be combined with each other without conflict. Improper restrictions on this application.

In the description of the embodiments of the present application, "upper", "lower" and "lateral" orientations or positional relationships are based on the orientations or positional relationships shown in Fig. 3 , wherein "top" is "upper" in Fig. 3 Direction, "bottom" is the "down" direction of Fig. 3, "height direction" is the up and down direction of Fig. 3. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present application. limits.

An embodiment of the present application provides a bellows assembly 9 of an anesthesia machine, please refer to FIG. The housing 91 has an accommodating cavity, one end of the silicone rubber folded bag 92 in the height direction is an open end, and the opposite end of the silicone rubber folded bag 92 in the height direction is a closed end, the silicone rubber folded bag 92 is arranged in the accommodating cavity, and the silicone rubber folded A driving gas accommodating space is formed between the bladder 92 and the inner wall of the accommodating cavity. The connection seat 93 includes a folded bag connector 931 . The connecting seat 93 is connected with the outer shell 91 , and the folding bag connecting piece 931 is located in the accommodating cavity and is sealingly connected with the open end of the silicone rubber folding bag 92 .

In the related art, the principle of automatic ventilation of an anesthesia machine with a bellows assembly is roughly as follows, please refer to FIG. 1 , when a patient 1 inhales, the driving gas enters between the folding bag 5 and the inner wall of the accommodating cavity from the driving gas inlet 7 . In the gas holding space, the gas is driven to compress the folding bag 5, and the gas in the folding bag 5 is pushed to flow along the breathing circuit to the absorption tank 4 to remove carbon dioxide, and then mixed with the fresh gas input from the fresh gas input port 8 and then inhaled. The one-way valve 3 is delivered to the patient 1 . Please refer to FIG. 2 , when the patient 1 exhales, the exhaled gas from the patient 1 passes through the exhalation one-way valve 2 along the breathing circuit and enters the folding bag 5, and the folding bag 5 is lifted up. When the folding bag 5 is unfolded to the limit position When there is excess exhaled air, the excess exhaled air will be discharged through the burst valve 6 . During the whole breathing process, the folding bag 5 realizes the recycling of the exhaled gas of the patient 1 through the movement of compression and lifting. The medical staff can also judge whether the breathing system and the breathing pipeline leak or supply by observing the lifting height of the folding bag 5. Whether the air is sufficient to ensure the normal ventilation needs of patient 1. In order to meet the motion requirements of the foldable bag 5 for compression and jacking up, most of the foldable bags 5 in the related art are made of natural rubber or neoprene rubber. However, both natural rubber and neoprene have many shortcomings. For example, natural rubber is prone to oxidation, aging and damage. At the same time, some people are allergic to natural rubber, and some regional regulations prohibit the use of natural rubber in the folding bag 5. Neoprene rubber is easy to absorb water and expand, and the breathing circuit of the anesthesia machine is relatively humid, which is easy to cause The folding bag 5 is inflated and deformed, resulting in unstable operation and air leakage. Once the folding bag 5 is aging, air leakage, unstable operation, and inaccurate air supply, it will affect the normal delivery of the gas in the folding bag 5. , the medical staff cannot correctly judge whether the breathing system and the breathing circuit are leaking or whether the air supply is sufficient, which will greatly affect the safety and reliability of the anesthesia machine.

The bellows assembly 9 of the present application adopts a silicone rubber foldable bag 92, which is not easy to be oxidized, aged and damaged, and does not have the problem of water absorption and expansion, so that the silicone rubber folded bag 92 can be stable on an anesthesia machine for a long time. It can improve the safety and reliability of the anesthesia machine. In addition, since the silicone rubber foldable bag 92 has better performance and long service life, its replacement frequency is far less than the replacement frequency of the natural rubber foldable bag and the neoprene foldable bag. Therefore, the use of the bellows assembly 9 of the present application can also greatly reduce the cost of users. The cost of replacing the folded bladder.

In one embodiment, the silicone rubber folded bladder 92 has a parting line.

The natural rubber folded bag and the neoprene folded bag in the related art are generally produced by the dipping process. Therefore, there is no parting line on the natural rubber folded bag and the neoprene folded bag, while the silicone rubber folded bag 92 of the present application can use The injection molding process is used to manufacture, therefore, the silicone rubber folding bag 92 manufactured by the injection molding process has a clamping line.

In addition, it should be noted that for the injection molding process, forming large-area thin-walled parts means that the entire mold cavity must be filled with silicone raw materials quickly, which requires large injection pressure, reasonable runner, mold temperature and Cooling design, and for large-area non-planar thin-walled parts such as the rubber folded bag 92, to make the rubber folded bag 92 uniform in thickness, it is very difficult to process and assemble the mold, which requires a uniform mold cavity size, and Design the demoulding method that cannot deform the rubber folded bag 92, otherwise the thickness of the rubber folded bag 92 will be uneven, which will inevitably cause the silicone rubber folded bag 92 to run unevenly, and even cause the patient to inhale and exhale during the automatic ventilation control process. The air control is inaccurate. Therefore, compared with the natural rubber folding bag and the neoprene folding bag, the silicone folding bag is more difficult to form. In the development process of the silicone foldable bladder 92 of the present application, in-depth research and demonstration have been carried out on the relevant mold design, factors affecting the uniformity of wall thickness during injection molding, product shaping after injection molding, and processing technology after secondary vulcanization, etc. , so that the wall thickness of the silicone rubber folded bag 92 can not only be controlled below 1 mm but also uniform.

The bellows assembly 9 in this embodiment can be an ascending bellows assembly or a descending bellows assembly. The ascending bellows assembly is also called a vertical bellows assembly. The connecting seat 93 of the ascending bellows assembly is provided at the bottom of the housing 91. When inhaling, the driving gas pushes the silicone rubber folded bag 92 to move from top to bottom in the vertical direction to compress the silicone rubber folded bag 92. When the patient exhales, the exhaled gas pushes the silicone rubber folded bag 92 from the bottom in the vertical direction. The upward movement causes the silicone rubber folded bladder 92 to expand. The descending bellows assembly is also called a hanging bellows assembly. The connecting seat 93 of the descending bellows assembly is arranged on the top of the casing 91. When the patient inhales, the driving gas pushes the silicone rubber folding bag 92 to move from bottom to top in the vertical direction to The silicone rubber folding bag 92 is compressed, and when the patient exhales, the exhaled gas pushes the silicone rubber folding bag 92 to move from top to bottom in the vertical direction, so that the silicone rubber folding bag 92 is unfolded. That is to say, during the breathing process of the patient, the movement direction of the silicone rubber folded bag 92 in the descending bellows assembly is opposite to the movement direction of the silicone rubber folded bag 92 in the ascending bellows assembly. However, for the descending bellows assembly, since the exhaled gas does not need to overcome the weight of the silicone rubber folding bag 92 when the patient exhales, it can also move from top to bottom by its own weight. Therefore, when the silicone rubber folding bag 92 moves from above When the downward movement is too fast or the patient's exhalation is not enough, the patient's lungs may generate negative pressure. At the same time, due to the self-weight of the silicone rubber folding bag 92, even if there is leakage in the breathing system and the breathing circuit, the silicone rubber folding bag 92 may leak. It will also move to the bottom, so medical staff cannot intuitively detect the leakage of the breathing system and breathing circuit. If the leakage problem is not found, the patient 1 will be insufficiently ventilated, which will cause danger to the patient. Therefore, preferably, the bellows assembly 9 is an ascending bellows assembly.

In addition, for the ascending bellows assembly, during the exhalation process, the gas exhaled by the patient needs to overcome the self-weight of the silicone rubber folding bag 92 to lift the silicone rubber folding bag 92, and the weight of the silicone rubber folding bag 92 is determined by its own weight. Determined by the surface area and the wall thickness, therefore, the wall thickness of the silicone rubber folded bag 92 should not be too large, otherwise the silicone rubber folded bag 92 will cause the patient to not be able to fully exhale the gas during the exhalation stage due to its large weight. Silicone rubber folded bladders 92 larger than 1 mm are particularly suitable for use in ascending bellows assemblies.

Further, since the inspiratory and expiratory volumes of pediatric patients are much smaller than those of adult patients, the bellows assembly 9 can be divided into an adult bellows assembly and a pediatric bellows assembly. Correspondingly, the silicone rubber folding bag 92 in the adult bellows assembly is Adult folding bag, the silicone rubber folding bag 92 in the pediatric bellows assembly is a pediatric folding bag, wherein the volume of the adult folding bag is not less than 1200ml, and the volume of the pediatric folding bag is not less than 300ml, thus, it can meet the different breathing of adults and children. need.

In one embodiment, the silicone rubber folding bag 92 includes a set ring 922 and a plurality of folding rings 921, and the folding bag connecting member 931 is a connecting tray. The sleeve ring 922 is disposed at one end of the plurality of folded rings 921 close to the connection tray, and is tightly sleeved on the outer side of the connection tray.

Specifically, the difference between the folding ring 921 and the sleeve ring 922 is that when the driving gas compresses the silicone rubber folding bag 92, the folding ring 921 can push the gas in the silicone rubber folding bag 92 into the breathing circuit by folding. After the gas enters the silicone rubber folding bag 92, the silicone rubber folding bag 92 can be lifted up by pushing the folding ring 921 to unfold, and the sleeve ring 922 mainly plays the role of sealing connection with the connecting tray, and the sleeve ring 922 cannot follow the folding ring 921. Fold or unfold together. When installing the silicone rubber foldable bag 92, the connecting tray extends into the silicone rubber foldable bag 92 from the opening of the sleeve ring 922, and the sleeve ring 922 is sleeved on the outside of the connection tray through elastic deformation. The stability and air tightness of the connection tray connection.

In addition, during the breathing process, the maximum stroke of the up and down movement of the silicone rubber foldable bag 92 cannot be too small. If the stroke is too small, the running range of the silicone rubber folded bag 92 is not obvious, which is not convenient for medical staff to observe the operation of the silicone rubber folded bag 92. For example, as shown in FIG. 9 , the surface of the casing 91 is generally provided with a scale mark, and the medical staff can determine the range of the silicone folding bag 92 running up and down in the casing 91 according to the scale mark, so as to observe the operation of the anesthesia machine to ventilate the patient. volume size. The up and down operation of the silicone rubber folding bag 92 is realized by the expansion and contraction of the folding rings 921. It is understandable that if the number of the folding rings 921 is too small, it is difficult to achieve a wide range of expansion and contraction; if there are too many, the structure will be complicated. and cost increases. Therefore, in one embodiment, the number of folding rings 921 of the adult folding bag is 5 to 10, and the number of the folding rings 921 of the pediatric folding bag is 10 to 20.

It should be noted that the up and down movement of the silicone rubber folded bag 92 described in this application means that the end of the silicone rubber folded bag 92 away from the connecting base 93 can move up and down, rather than the whole silicone rubber folded bag 92 can move up and down. The folding ring 921 in this application refers to a ring unit on the silicone rubber folding bag 92 that can be folded and unfolded, including the ring (or called the top ring) that is farthest from the connection seat 93 .

Referring to FIG. 5 , in one embodiment, the silicone rubber foldable bag 92 is in a natural state, the foldable ring 921 is folded, and the height of the folded ring 922 is greater than the height of the folded folded ring 921 . Sealed connection with connection tray.

It should be noted that the natural state described in this application refers to the state in which the silicone rubber folded bag 92 after the folded ring 921 is folded is kept under no external force.

4 and 5, in one embodiment, the outer diameter of the sleeve ring 922 is smaller than the outer diameter of the folding ring 921. Since the material of silicone rubber is relatively soft, the outer diameter of the sleeve ring 922 is set to be smaller than the outer diameter of the folding ring 921. The outer diameter of the ring 921 can keep the sleeve ring 922 in an upright state, so as to prevent the sleeve ring 922 from slackening and collapsing, which affects the tightness of the connection between the sleeve ring 922 and the connection tray.

In other embodiments, the outer diameter of the sleeve ring 922 may also be equal to the outer diameter of the folding ring 921 .

In one embodiment, the silicone rubber folding bag 92 is an adult folding bag, the inner diameter of the sleeve ring 922 of the adult folding bag can be 100mm-165mm, and the outer diameter of the connecting tray sealingly connected with the sleeve ring 922 of the adult folding bag can be larger than that of the adult bag. The inner diameter of the sleeve ring 922 of the folded bag is 5mm-10mm larger. Optionally, the inner diameter of the nesting ring 922 of the adult folding bag is 132 mm, and the outer diameter of the connecting tray is 140 mm.

In another embodiment, the silicone rubber foldable bag 92 is a pediatric foldable bag, the inner diameter of the set ring 922 of the pediatric foldable bag can be 38mm-100mm, and the outer diameter of the connecting tray sealingly connected with the set ring 922 of the pediatric foldable bag can be larger than The inner diameter of the set ring 922 of the pediatric folding bag is 2mm-6mm larger. Optionally, the inner diameter of the set ring 922 of the pediatric folding bag is 68 mm, and the outer diameter of the connecting tray is 70 mm.

For the sleeve ring 922 of the embodiment of the present application, when the pressure inside the silicone rubber folded bag 92 reaches 100 cmH2O, it can also ensure good sealing between the sleeve ring 922 and the folded bag tray.

Referring to FIGS. 3 and 6 , in one embodiment, the bellows assembly 9 further includes a top plate assembly 94 , and the top plate assembly 94 is connected to the closed end of the silicone rubber folding bag 92 . The top plate assembly 94 can keep the closed end of the silicone rubber folding bag 92 flat, so as to prevent the silicone rubber folding bag 92 from being twisted during the up and down movement and affecting the smoothness of the movement of the silicone rubber folding bag 92 .

Please refer to FIGS. 3 , 6 to 8 , in a specific embodiment, the top plate assembly 94 includes a top plate ring 941 and a top plate 942 , and at least a part of the outer edge of the top plate 942 faces the side of the top plate 942 Folded over to form the snap edge 942a, the top plate ring 941 is set in the silicone rubber folded pocket 92 and has an interference fit with the closed end of the silicone rubber folded pocket 92, and the closed end of the silicone rubber folded pocket 92 is snapped into the snap edge 942a . That is to say, the outer diameter of the top plate ring 941 can be slightly larger than the inner diameter of the closed end of the silicone rubber folding bag 92. After the top plate ring 941 is inserted into the silicone rubber folding bag 92, the closed end of the silicone rubber folding bag 92 can be stretched, In order to keep the closed end of the silicone rubber folded bag 92 flat, then, the closed end of the silicone rubber folded bag 92 inserted into the top plate ring 941 is snapped into the clip edge 942a of the top plate 942, which can be further fixed. The function of the top plate ring 941 can ensure that the closed end of the silicone rubber folding bag 92 can be kept flat all the time.

In other embodiments, the top plate assembly 94 may also have other structural forms. For example, the top plate assembly 94 may only have the top plate ring 941 without the top plate 942, or may only have the top plate 942 without the top plate 942. The top plate ring 941, for example, the top plate 942 can directly interfere with the end of the silicone rubber folding bag 92 away from the folding bag connecting member 931, and the top plate 942 can also be glued to the end of the silicone rubber folding bag 92 away from the folding bag connecting member 931. Then, as long as it is ensured that the top plate assembly 94 can play the role of keeping the end of the silicone rubber folding bag 92 away from the folding bag connecting member 931 flat.

In one embodiment, the bellows assembly 9 is an adult bellows assembly, the silicone rubber folding bag 92 is an adult folding bag, and the diameter of the accommodating cavity is 130mm-170mm. The diameter of the top plate 942 may be 1mm-5mm smaller than the diameter of the receiving cavity. The outer diameter of the folding ring 921 of the adult folding bag may be 2mm-10mm smaller than the diameter of the receiving cavity. This size range can not only ensure that the adult folding bag can move up and down smoothly in the accommodating cavity, but also ensure that the gap between the adult folding bag and the inner wall of the accommodating cavity will not be too large in the lateral direction of the adult folding bag. Ensure the stability of the up and down movement of the adult foldable pouch.

In one embodiment, the bellows assembly 9 is a pediatric bellows assembly, the silicone rubber folding bag 92 is a pediatric folding bag, and the diameter of the accommodating cavity is 50mm-100mm. The diameter of the top plate may be 1mm-5mm smaller than the diameter of the receiving cavity. . The outer diameter of the folding ring 921 of the pediatric folding bag may be 2mm-8mm smaller than the diameter of the receiving cavity. This size range can not only ensure that the pediatric folding bag can move up and down smoothly in the accommodating cavity, but also ensure that the gap between the pediatric folding bag and the inner wall of the accommodating cavity will not be too large in the lateral direction of the pediatric folding bag. To ensure the stability of the up and down movement of the children's folding bag.

Referring to FIG. 3 and FIG. 6 , in one embodiment, the bellows assembly 9 further includes a buffer member 95 . The buffer member 95 is disposed on the top plate assembly 94 and at least partially protrudes from the side of the top plate assembly 94 facing away from the silicone rubber folding bag 92 . That is to say, the buffer member 95 may be disposed on the side of the top plate assembly 94 away from the silicone rubber folding bag 92, or only a part of the structure may protrude from the side of the top plate assembly 94 away from the silicone rubber folding bag 92. When the silicone rubber is folded When the bag 92 is deployed to the limit position, the buffer member 95 is in contact with the inner wall of the casing 91 , thereby preventing the top plate assembly 94 from colliding with the inner wall of the casing 91 and causing abnormal noise, thereby buffering and reducing noise.

It can be understood that the buffer member 95 is not limited to be provided only on the top plate assembly 94. In other embodiments, the buffer member 95 can also be disposed on the inner wall of the accommodating cavity and opposite to the top plate assembly 94, which is equivalent to silicon When the rubber foldable bag 92 is unfolded to the limit position, the top plate assembly 94 is in contact with the buffer member 95, or, the buffer member 95 can be provided on the top plate assembly 94 and the inner wall of the accommodating cavity at the same time, as long as the buffer member 95 can play the role of buffering and elimination. The role of sound can be.

Please refer to FIG. 3 and FIG. 6 , in a specific embodiment, the buffer member 95 can be a buffer column, the number of the buffer column can be one or more, and the buffer column can be arranged on the top plate assembly 94, or can be arranged on the top plate assembly 94. On the inner wall of the accommodating cavity, when there are multiple buffer columns, a part of the buffer columns may also be arranged on the top plate assembly 94, and another part of the buffer columns may be arranged on the inner wall of the accommodating cavity. For the buffer column arranged on the top plate assembly 94, when the silicone rubber folded bag 92 is unfolded to the limit position, the buffer column is in tangential contact with the inner wall of the accommodating cavity. For example, the cross section of the end of the buffer column in contact with the inner wall of the accommodating cavity may be arc, triangular, or curved, etc. Meanwhile, the inner wall of the accommodating cavity in contact with the buffer column is flat, or the inner wall of the accommodating cavity in contact with the buffer column is flat. The inner wall is formed with small protrusions in the shape of arc, triangle or curve in cross section. At the same time, the end face of the end of the buffer column in contact with the inner wall of the accommodating cavity is flat, or alternatively, the end of the buffer column in contact with the inner wall of the accommodating cavity is flat. The cross-section can be arc, triangle or curve, etc. At the same time, small protrusions with arc, triangle or curve cross-section are formed on the inner wall of the accommodating cavity in contact with the buffer column, as long as the buffer column and the accommodating cavity are ensured The inner walls of the cavity are in tangential contact. The advantage of arranging the buffer column to be in tangential contact with the inner wall of the accommodating cavity is that it can prevent the buffer column and the inner wall of the accommodating cavity from being adsorbed together and affecting the normal movement of the silicone rubber folding bag 92 .

Similarly, when the buffer column is arranged on the inner wall of the accommodating cavity and the silicone rubber folded bag 92 is unfolded to the limit position, the buffer column and the top plate assembly 94 can also be in tangential contact in the manner described above.

Another embodiment of the present application also provides an anesthesia machine, the anesthesia machine includes an air circuit assembly and a bellows assembly 9, and the air circuit assembly includes a driving gas branch, a fresh gas branch, a patient inspiratory branch, and a patient expiratory branch The driving gas branch is connected with the bellows assembly 9 to deliver the driving gas to the bellows assembly 9; the fresh gas branch is connected with the patient inspiratory branch to pass the fresh gas through the patient inspiratory branch The patient’s inhalation branch is connected to the bellows assembly 9 and the fresh gas branch to receive the fresh gas and output the circulating gas to the patient’s end; the patient’s expiratory branch is connected to the bellows assembly 9 and the fresh gas branch. The bellows assembly 9 is connected, and when the patient exhales, the exhaled gas enters the bellows assembly 9 .

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

An anesthesia machine, comprising an air circuit assembly and a bellows assembly, characterized in that:

The air circuit assembly includes a drive gas branch, a fresh gas branch, a patient inspiratory branch and a patient expiratory branch;

the drive gas branch is connected to the bellows assembly to deliver drive gas to the bellows assembly;

the fresh gas branch is connected to the patient inspiratory branch, so as to deliver fresh gas to the patient end through the patient inspiratory branch;

the patient suction branch is connected to the bellows assembly and the fresh gas branch to receive the fresh gas and output the circulating gas to the patient end;

The patient exhalation branch is connected to the bellows assembly, and when the patient end exhales, the exhaled gas enters the bellows assembly;

Wherein, the bellows assembly includes:

housing with accommodating cavity,

A silicone rubber folded bag, one end of the silicone rubber folded bag along the height direction is an open end, and the opposite end of the silicone rubber folded bag along the height direction of the open end is a closed end, and the silicone rubber folded bag is arranged on the In the accommodating cavity, the driving gas accommodating space is formed between the inner wall of the accommodating cavity and the silicone rubber folding bag,

The connecting seat includes a folding bag connecting piece; the connecting seat is connected with the outer shell, and the folding bag connecting piece is located in the accommodating cavity and is sealingly connected with the open end of the silicone rubber folding bag.
The anesthesia machine of claim 1, wherein the silicone rubber foldable bladder has a parting line.
The anesthesia machine according to claim 1 or 2, wherein the wall thickness of the silicone rubber folding bag is not greater than 1 mm; and/or,

The silicone rubber folding bag is an adult folding bag, and the volume of the adult folding bag is not less than 1200ml; or, the silicone rubber folding bag is a pediatric folding bag, and the volume of the pediatric folding bag is not less than 300ml.
The anesthesia machine according to claim 1 or 2, wherein the silicone rubber folding bag comprises a set ring and a plurality of folding rings, and the folding bag connector is a connecting tray;

The sleeve ring is disposed at one end of the plurality of folding rings close to the connection tray, and is tightly sleeved on the outer side of the connection tray.
The anesthesia machine according to claim 4, wherein the silicone rubber folding bag is an adult folding bag, and the number of the folding rings of the adult folding bag is 5 to 10; or,

The silicone rubber folding bag is a pediatric folding bag, and the number of the folding rings of the pediatric folding bag is 10 to 20.
The anesthesia machine according to claim 4, wherein the silicone rubber folded bag is in a natural state, the folded ring is folded, and the length of the sleeve ring along the axis direction is greater than the length of the folded folded ring along the axis direction; And/or, the inner diameter of the sleeve ring is less than or equal to the inner diameter of the folding ring.
The anesthesia machine according to claim 4, wherein the silicone rubber folding bag is an adult folding bag, and the inner diameter of the set ring of the adult folding bag is 100mm-165mm; and/or, the outer diameter ratio of the connecting tray is The inner diameter of the set ring is 5mm-10mm larger; or,

The silicone rubber folding bag is a pediatric folding bag, and the inner diameter of the set ring of the pediatric folding bag is 38mm-100mm; and/or, the outer diameter of the connecting tray is larger than the inner diameter of the set ring by 2mm-6mm .
According to the anesthesia machine according to claim 1 or 2, the bellows assembly further comprises a top plate assembly, and the top plate assembly is connected with the closed end of the silicone rubber folding bag.
The anesthesia machine according to claim 8, wherein the top plate assembly comprises a top plate ring and a top plate, and at least a part of the outer edge of the top plate is folded toward one side of the top plate to form a clamping edge;

The top plate ring is arranged in the silicone rubber folded bag and is in an interference fit with the closed end of the silicone rubber folded bag, and the closed end of the silicone rubber folded bag is snapped into the clamping edge.
The anesthesia machine of claim 9, the folded capsule comprising a plurality of folded rings;

The bellows assembly is an adult bellows assembly, the silicone rubber folding bag is an adult folding bag, and the diameter of the accommodating cavity is 130mm-170mm; and/or, the diameter of the top plate is 1mm smaller than the diameter of the accommodating cavity -5mm; and/or, the outer diameter of the folding ring of the adult folding bag is 2mm-10mm smaller than the diameter of the receiving cavity; or,

The bellows assembly is a pediatric bellows assembly, the silicone rubber foldable bag is a pediatric foldable bag, and the diameter of the accommodating cavity is 50mm-100mm; and/or, the diameter of the top plate is 1mm smaller than the diameter of the accommodating cavity -5mm; and/or, the outer diameter of the folding ring of the pediatric folding bag is 2mm-8mm smaller than the diameter of the receiving cavity.
The anesthesia machine according to claim 8, wherein the bellows assembly further comprises a buffer;

The buffer member is disposed on the top plate assembly, and at least part of the structure of the buffer member protrudes from the side of the top plate assembly away from the silicone rubber folded bag; and/or,

The buffer member is arranged on the inner wall of the accommodating cavity and is arranged opposite to the top plate assembly.
The anesthesia machine according to claim 11, wherein the buffer is a buffer column;

The buffer column is arranged on the top plate assembly, and when the silicone rubber foldable bag is deployed to a limit position, the buffer column is in tangential contact with the inner wall of the accommodating cavity; and/or,

The buffer column is arranged on the inner wall of the accommodating cavity, and when the silicone rubber folding bag is unfolded to a limit position, the buffer column is in tangential contact with the top plate assembly.
The anesthesia machine according to claim 1 or 2, wherein the bellows assembly is an ascending bellows assembly.
A bellows assembly of an anesthesia machine, comprising:

a housing with an accommodating cavity;

A silicone rubber folded bag, one end of the silicone rubber folded bag in the height direction is an open end, and the opposite end of the silicone rubber folded bag in the height direction is a closed end, and the silicone rubber folded bag is arranged in the accommodating cavity , a driving gas accommodating space is formed between the silicone rubber folding bag and the inner wall of the accommodating cavity;

The connecting seat includes a folding bag connecting piece; the connecting seat is connected with the outer shell, and the folding bag connecting piece is located in the accommodating cavity and is sealedly connected with the open end of the silicone rubber folding bag.
The bellows assembly of claim 14, the silicone rubber folded bladder having a parting line.
The bellows assembly according to claim 14 or 15, wherein the silicone rubber folding bag comprises a sleeve ring and a plurality of folding rings, and the folding bag connector is a connecting tray;

The sleeve ring is arranged at one end of the plurality of folding rings close to the connection tray, and is tightly sleeved on the outer side of the connection tray.
The bellows assembly according to claim 16, wherein the silicone rubber folding bag is in a natural state, the folding ring is folded, and the height of the set ring is greater than the height of the folding ring after being folded; and/or, the The inner diameter of the sleeve ring is less than or equal to the inner diameter of the folding ring.
The bellows assembly of claim 14 or 15, further comprising a top plate assembly connected to the closed end of the silicone rubber folded bladder.
The bellows assembly according to claim 18, wherein the top plate assembly comprises a top plate ring and a top plate, and at least a part of the outer edge of the top plate is folded toward one side of the top plate to form a snap edge;

The top plate ring is arranged in the silicone rubber folded bag and is in an interference fit with the closed end of the silicone rubber folded bag, and the closed end of the silicone rubber folded bag is snapped into the clamping edge.
The bellows assembly of claim 18, further comprising a buffer;

The buffer member is disposed on the top plate assembly, and at least part of the structure protrudes from the side of the top plate assembly away from the silicone rubber folded bag; and/or,

The buffer member is arranged on the inner wall of the accommodating cavity and is arranged opposite to the top plate assembly.