Gas transmission device for anaesthesia machine

Abstract

The invention discloses a gas conveying device for an anaesthesia machine, and belongs to the technical field of medical supplies, the gas conveying device comprises a case, an evaporator is arranged in the case, a first conical pipe and a second conical pipe are further arranged in the case, and a gas conveying pipe is further arranged in the case; two negative pressure pipes inserted into the first conical pipe and the second conical pipe respectively are arranged at the outlet end of the gas conveying pipe, a first mixing pipe and a temporary storage tank are further arranged in the machine box, a second mixing pipe is arranged in the first mixing pipe, and the inlet end of the first mixing pipe is connected with the outlet end of the first conical pipe; the inlet end of the second mixing pipe is communicated with the second conical pipe; a plurality of exhaust ports are formed in the second mixing pipe; the temporary storage tank is communicated with the first mixing pipe, a rotating roller is arranged in the temporary storage tank, and the rotating roller directly faces the inlet end of the temporary storage tank; compared with the prior art, through the two conical pipes, the first mixing pipe, the second mixing pipe and the temporary storage tank, multi-time collision mixing of anesthetic steam is achieved, and the mixing uniformity is improved as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of medical supplies and equipment, and in particular to a gas delivery device for an anesthesia machine. Background Art

[0002] The anesthesia machine delivers anesthetics into the patient's alveoli through a mechanical circuit to form a partial pressure of anesthetic gas. After diffusing into the blood, it directly inhibits the central nervous system, thereby producing the effect of general anesthesia. The anesthesia machine is a semi-open anesthesia device. It is mainly composed of an anesthesia vaporizer, a flow meter, a folding bellows ventilator, a breathing circuit (including inhalation and exhalation one-way valves and manual air bags), a corrugated pipeline and other components; In the prior art, anesthetics are heated by an anesthesia vaporizer to form steam, which is then supplied to the patient for breathing through an air pipe and a breathing mask. However, in the process of delivering anesthetic steam, the medical oxygen and anesthetic steam are not mixed evenly in the anesthesia machine in the prior art, making it difficult to accurately control the delivery amount of anesthetics. Summary of the invention

[0003] The main purpose of the present application is to provide a gas delivery device for an anesthesia machine, aiming to solve the defect of uneven drug mixing in the prior art.

[0004] This application achieves the above objectives through the following technical solutions: A gas delivery device for an anesthesia machine, comprising a chassis; An evaporator, the evaporator is arranged in the chassis; the chassis is also provided with a first conical tube and a second conical tube; An air delivery pipe, the inlet end of which is connected to an external high-pressure air source, and the outlet end of which is provided with two negative pressure pipes, which are respectively inserted into the first conical pipe and the second conical pipe; a material extraction pipe is provided in each of the first conical pipe and the second conical pipe, and the two material extraction pipes are both inserted into the evaporator; A first mixing tube, wherein a second mixing tube is disposed inside the first mixing tube, an inlet end of the first mixing tube is connected to an outlet end of the first tapered tube, and an inlet end of the second mixing tube is connected to the second tapered tube; and the second mixing tube is provided with a plurality of exhaust ports for discharging materials into the first mixing tube; A temporary storage tank is connected to the first mixing tube, a rotating roller is arranged in the temporary storage tank, the rotating roller is directly facing the inlet end of the temporary storage tank, and a breathing mask is connected to the outlet end of the temporary storage tank.

[0005] Optionally, a four-way valve is provided on the gas delivery pipe, and an air supply pipe is connected to the four-way valve, and an outlet end of the air supply pipe is inserted into the bottom of the evaporator.

[0006] Optionally, a duckbill nozzle is provided at the outlet end of the air supply pipe; a buffer pipe is also provided on the air supply pipe.

[0007] Optionally, the second mixing tube is inserted into the first mixing tube, and the axis of the second mixing tube is parallel to the axis of the first mixing tube; the second mixing tube is in contact with the top surface of the first mixing tube.

[0008] Optionally, a plurality of exhaust ports are provided at the bottom of the second mixing tube along the axis of the second mixing tube.

[0009] Optionally, along the air flow direction, the exhaust port is arranged in a conical shape with a large inlet and a small outlet.

[0010] Optionally, a plurality of support plates are disposed on the bottom surface of the second mixing tube, and each of the support plates is provided with air holes; and the air holes of any two adjacent support plates are staggered.

[0011] Optionally, the outer surface of the temporary storage tank is wrapped with a PTC heating plate, and a temperature sensor is also arranged in the temporary storage tank.

[0012] Optionally, the temporary storage tank includes an upper tank body and a lower tank body spliced ​​to each other, and the upper tank body and the lower tank body are both provided with plug-in holes. The rotating roller includes a drum, and a plurality of driving blades are provided on the outer circumference of the drum. The upper and lower sides of the drum are both provided with rotating shafts adapted to the plug-in holes.

[0013] Optionally, an exhaust roller is rotatably provided at the outlet end of the temporary storage tank, a plurality of exhaust fan blades are provided on the exhaust roller, and a driving motor connected to the exhaust roller is also provided on the temporary storage tank.

[0014] Compared with the prior art, this application has the following beneficial effects: The present application includes a chassis, an evaporator is arranged in the chassis, and a first conical tube and a second conical tube are also arranged in the chassis, and an air delivery pipe is also arranged in the chassis, and two negative pressure tubes are arranged at the outlet end of the air delivery pipe, and the two negative pressure tubes are respectively inserted into the first conical tube and the second conical tube, and a first mixing tube and a temporary storage tank are also arranged in the chassis, and a second mixing tube is arranged in the first mixing tube, and the inlet end of the first mixing tube is connected to the outlet end of the first conical tube, and the inlet end of the second mixing tube is connected to the second conical tube; the second mixing tube is provided with a plurality of exhaust ports for discharging materials to the first mixing tube; the temporary storage tank is connected to the first mixing tube, and a rotating roller is arranged in the temporary storage tank, and the rotating roller is directly opposite to the inlet end of the temporary storage tank, and the outlet end of the temporary storage tank is connected to a breathing mask; When in use, firstly, anesthetic vapor is generated by the evaporator, and high-pressure medical oxygen or high-pressure air is introduced into the negative pressure tube from an external high-pressure gas source. After entering the conical tube, negative pressure is formed in the first conical tube and the second conical tube respectively, and the anesthetic vapor in the evaporation tank is extracted through the two extraction pipes, and the anesthetic vapor is respectively delivered to the first mixing tube and the second mixing tube, wherein the anesthetic vapor in the second mixing tube enters the first mixing tube through the exhaust port, and is mixed with the high-speed flowing anesthetic vapor in the first mixing tube and then discharged from the first mixing tube, and finally enters the temporary storage tank. When entering the temporary storage tank, the high-speed airflow will directly hit the rotating roller, and while driving the rotating roller to rotate, the rotating rotating roller will also stir and mix the anesthetic vapor, and finally the anesthetic vapor is inhaled into the lungs of the patient through the breathing mask; Compared with the prior art, the anesthetic steam first enters the first conical tube and the second conical tube respectively through the extraction pipe, and the anesthetic steam will be quickly stirred and mixed with the breathing oxygen in the fierce airflow movement; and in the first mixing tube, the anesthetic steam in the second mixing tube will evenly cover the airflow path of the first mixing tube, and the anesthetic steam entering the first mixing tube will collide and mix with the anesthetic steam in the second mixing tube again, and the mixed anesthetic steam will directly enter the temporary storage tank. When entering the temporary storage tank, the high-speed airflow will directly hit the rotating roller, and while pushing the rotating roller to rotate, the rotating rotating roller will also stir and mix the anesthetic steam. Therefore, the present application achieves the mixing of anesthetic steam and breathing oxygen through three mutual collisions and stirring effects, and improves the uniformity of mixing as much as possible; Secondly, through multiple collisions and the rotational friction loss of the rotating roller, the kinetic energy of the airflow can be better consumed, thereby reducing the flow rate of the airflow, improving the patient's breathing comfort, and also better controlling the flow rate of the airflow.

[0015] Finally, the present application extracts anesthetic vapor through the input of high-pressure medical oxygen or high-pressure air, and the output of anesthetic vapor can be adjusted by controlling the pressure, thereby facilitating the subsequent detection of the delivery volume and concentration of the anesthesia device vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An exploded view of a gas delivery device for an anesthesia machine provided in Embodiment 1 of the present application; Figure 2 A schematic structural diagram of a gas delivery device for an anesthesia machine provided in Embodiment 1 of the present application; Figure 3 A cross-sectional view of a gas delivery device for an anesthesia machine provided in Embodiment 1 of the present application; Figure 4 is a schematic diagram of the assembly of the first mixing tube and the second mixing tube; Figure 5 It is a cross-sectional view of the temporary storage tank; Figure markings: 1-chassis, 2-evaporator, 3-first conical tube, 4-second conical tube, 5-gas supply pipe, 6-negative pressure pipe, 7-extraction pipe, 8-first mixing tube, 9-second mixing tube, 10-exhaust port, 11-temporary storage tank, 12-rotating roller, 13-four-way, 14-air supply pipe, 15-duckbill nozzle, 16-buffer tube, 17-support plate, 18-air vent, 19-PTC heating plate, 20-temperature sensor, 21-exhaust drum, 22-exhaust fan blades, 23-drive motor, 1101-upper tank body, 1102-lower tank body, 1103-plug hole, 1201-drum, 1202-drive fan blades, 1203-rotating shaft.

[0017] The purpose, features and advantages of this application will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] Implementation Method 1 Reference Figures 1 to 5 This embodiment is an optional embodiment of the present application, which discloses a gas delivery device for an anesthesia machine, including a chassis 1, in which an evaporator 2, a first conical tube 3 and a second conical tube 4 are arranged, and a gas delivery pipe 5 and a negative pressure pipe 6 are also arranged in the chassis 1, and the inlet end of the gas delivery pipe 5 is connected to an external medical oxygen source. It should be pointed out that the pressure of the medical oxygen source connected in the present application is higher than that of the medical oxygen source in the prior art, so as to ensure that the required negative pressure of material extraction can be formed; The outlet end of the gas delivery pipe 5 is connected to a spool 13, two branches of which are connected to the negative pressure pipe 6, and the other branch is connected to the air supply pipe 14; the large ends of the first conical tube 3 and the second conical tube 4 are both provided with sealing plates, and the sealing plates are provided with plug holes 1103, wherein the outlet end of one of the negative pressure pipes 6 is inserted into the first conical tube 3 from the plug hole 1103 on the sealing plate at the large end of the first conical tube 3, and at the same time, the other negative pressure pipe 6 is connected to the second conical tube 4 in the same way, and the outlet ends of the two negative pressure pipes 6 are respectively opposite to the small ends of the first conical tube 3 and the second conical tube 4; The outlet ends of the first tapered tube 3 and the second tapered tube 4 are both connected to an air pipe; The free end of the air supply pipe 14 is inserted into the tank body for generating anesthetic vapor in the evaporator 2; at the same time, a buffer pipe 16 and a duckbill nozzle 15 are sequentially arranged on the air supply pipe 14 along the air flow direction, and the buffer pipe 16 can effectively reduce the air flow rate to avoid excessive flow rate of medical oxygen entering the evaporator 2, and at the same time, combined with the duckbill nozzle 15, it is ensured that the anesthetic vapor generated by evaporation is squeezed to the upper side of the evaporator 2 by the medical oxygen; secondly, the air supply pipe 14 can continuously introduce gas into the evaporator 2 to avoid the reduction of air pressure due to excessive air extraction, ensure the balance of the internal and external pressure difference, and ensure the stable operation of the evaporator 2; The first conical tube 3 and the second conical tube 4 are further provided with a material extraction pipe 7, the inlet ends of which are respectively inserted into the tank body for generating anesthetic vapor in the evaporator 2, and the inlet ends of which are located at the upper part of the tank body to extract the anesthetic vapor from the upper part; The chassis 1 is also provided with a first mixing tube 8 and a second mixing tube 9. Along the axis of the first mixing tube 8, sealing plates are provided at both ends of the first mixing tube 8. The upper part of the sealing plates is provided with mounting holes. The two ends of the second mixing tube 9 are respectively inserted into the two mounting holes. The lower side of the first mixing tube 8 is a flow channel for anesthetic vapor. Air pipes are provided on the sealing plates on both sides of the first mixing tube 8, and the two air pipes are both located at the lower side of the mounting hole, so that the lower side area of ​​the first mixing tube 8 is used as the air flow area. Among the two air pipes, one is an air inlet pipe, which is connected to the small end of the first mixing tube 8, and the other is an air outlet pipe, which is connected to a temporary storage tank 11; at the same time, an air inlet pipe is also connected to the second mixing tube 9, and the air inlet pipe is connected to the small end of the second tapered tube 4; the two air inlet pipes are located on the same side of the first mixing tube 8; A plurality of exhaust ports 10 are also provided on the bottom surface of the second mixing tube 9. The exhaust ports 10 are arranged in sequence along the axial direction of the second mixing tube 9. At the same time, along the flow direction of the airflow, the exhaust ports 10 are arranged in a conical shape with a large inlet and a small outlet. When the above device is in use, the anesthetic vapor will be divided into two streams, one of which enters the second mixing tube 9 and spreads over the bottom area of ​​the first mixing tube 8 through the exhaust port 10; the other stream will enter the first mixing tube 8 and be output from the exhaust pipe in the axial direction. At the same time, the two streams of anesthetic vapor will collide and mix again during the flow process. It not only has a simple structure, but also can further guide the collision of anesthetics, thereby improving the uniformity of mixing. At the same time, a plurality of support plates 17 are also provided at the bottom of the second mixing tube 9, and the two sides of each support plate 17 are respectively connected to the second mixing tube 9 and the first mixing tube 8 to support the second mixing tube 9; each support plate 17 is provided with an air hole 18; the air holes 18 of any two adjacent support plates 17 are staggered; the air holes 18 can form an S-shaped path on the air flow channel of the first mixing tube 8, thereby increasing the residence time of the anesthetic vapor and forming a swirling airflow, which is beneficial to improving the mixing uniformity of the anesthetic vapor and the medical oxygen; The temporary storage tank 11 includes an upper tank body 1101 and a lower tank body 1102, the upper tank body 1101 and the lower tank body 1102 are spliced ​​and connected to each other, the upper tank body 1101 and the lower tank body 1102 are both rectangular parallelepiped structures, and the spliced ​​temporary storage tank 11 is a cube or rectangular parallelepiped structure; along the length direction of the temporary storage tank 11, the gas outlet end of the first mixing tube 8 is connected to one end of the temporary storage tank 11; at the same time, the upper tank body 1101 and the lower tank body 1102 are both provided with a plug hole 1103, and the temporary storage tank 11 is also provided with a rotating roller 12, and the rotating roller 12 includes a roller 1201, and a plurality of driving blades 1202 are provided on the outer circumference of the roller 1201, and a rotating shaft 1203 adapted to the plug hole 1103 is provided on the upper and lower sides of the roller 1201; The roller 1201 is disposed at one side of the inlet end of the temporary storage tank 11, and the driving fan blade 1202 is directly opposite to the airflow inlet of the temporary storage tank 11, so as to ensure that the airflow entering the temporary storage tank 11 can directly blow the roller 1201; At the same time, the temporary storage tank 11 is also connected to a breathing mask through an air pipe, and an exhaust drum 21 is also provided at the outlet end of the temporary storage tank 11, and a plurality of exhaust fan blades 22 are provided on the exhaust drum 21. The temporary storage tank 11 is also provided with a driving motor 23 connected to the exhaust drum 21; The outer surface of the temporary storage tank 11 is also wrapped with a PTC heating plate 19, a temperature sensor 20 is arranged in the temporary storage tank 11, and a temperature controller connected to the temperature sensor 20 is also arranged on the temporary storage tank 11; When the temporary storage tank 11 is in use, the temperature in the temporary storage tank 11 is first raised to the evaporation temperature of the anesthetic by the PTC heating plate 19, thereby performing secondary heating on the anesthetic vapor to prevent the anesthetic from condensing again during the temporary storage process, thereby ensuring the uniformity and concentration of the discharged anesthetic; When the anesthetic vapor enters the temporary storage tank 11, it first hits the rotating roller 12, and is stirred and mixed again by the rotating rotating roller 12. When the anesthetic vapor needs to be discharged, the exhaust roller 21 will stir and mix the anesthetic vapor again, and output the anesthetic vapor from the output end at the same time, so as to avoid the anesthetic vapor flow rate being too high and affecting the patient's breathing. Compared with the prior art, the first anesthetic vapor first enters the first conical tube and the second conical tube respectively through the extraction pipe, and in the fierce airflow movement, the anesthetic vapor will be quickly stirred and mixed with the breathing oxygen; and In the first mixing tube, the anesthetic vapor in the second mixing tube will evenly cover the airflow path of the first mixing tube, and the anesthetic vapor entering the first mixing tube will collide and mix with the anesthetic vapor in the second mixing tube again, and the mixed anesthetic vapor will directly enter the temporary storage tank. When entering the temporary storage tank, the high-speed airflow will directly hit the rotating roller, and while pushing the rotating roller to rotate, the rotating rotating roller will also stir and mix the anesthetic vapor. Therefore, the present application achieves the mixing of anesthetic vapor and respiratory oxygen through three mutual collisions and stirring effects, and improves the uniformity of mixing as much as possible; Secondly, through multiple collisions and the rotational friction loss of the rotating roller, the kinetic energy of the airflow can be better consumed, thereby reducing the flow rate of the airflow, improving the patient's breathing comfort, and also better controlling the flow rate of the airflow.

[0023] Finally, the present application extracts anesthetic vapor through the input of high-pressure medical oxygen or high-pressure air, and the output of anesthetic vapor can be adjusted by controlling the pressure, thereby facilitating the subsequent detection of the delivery volume and concentration of the anesthesia device vapor.

[0024] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A gas delivery device for an anesthesia machine, characterized in that: comprising a chassis (1); An evaporator (2), the evaporator (2) being arranged in the chassis (1); a first conical tube (3) and a second conical tube (4) are also arranged in the chassis (1); An air delivery pipe (5), the inlet end of the air delivery pipe (5) being connected to an external high-pressure air source, and the outlet end of the air delivery pipe (5) being provided with two negative pressure pipes (6), the two negative pressure pipes (6) being respectively inserted into the first conical pipe (3) and the second conical pipe (4); a material extraction pipe (7) being provided in each of the first conical pipe (3) and the second conical pipe (4), the two material extraction pipes (7) being both inserted into the evaporator (2); a first mixing tube (8), wherein a second mixing tube (9) is arranged inside the first mixing tube (8), the inlet end of the first mixing tube (8) is connected to the outlet end of the first tapered tube (3), and the inlet end of the second mixing tube (9) is connected to the second tapered tube (4); the second mixing tube (9) is provided with a plurality of exhaust ports (10) for discharging materials into the first mixing tube (8); A temporary storage tank (11), the temporary storage tank (11) is connected to the first mixing pipe (8), a rotating roller (12) is arranged in the temporary storage tank (11), the rotating roller (12) is directly opposite to the inlet end of the temporary storage tank (11), and the outlet end of the temporary storage tank (11) is connected to a breathing mask.

2. A gas delivery device for an anesthesia machine according to claim 1, characterized in that: The gas delivery pipe (5) is provided with a four-way valve (13), and the four-way valve (13) is connected to an air supply pipe (14), and the outlet end of the air supply pipe (14) is inserted into the bottom of the evaporator (2).

3. A gas delivery device for an anesthesia machine according to claim 2, characterized in that: The outlet end of the air supply pipe (14) is provided with a duckbill nozzle (15); the air supply pipe (14) is also provided with a buffer pipe (16).

4. The gas delivery device for an anesthesia machine according to claim 1, characterized in that: The second mixing tube (9) is inserted into the first mixing tube (8), and the axis of the second mixing tube (9) is parallel to the axis of the first mixing tube (8); the second mixing tube (9) is in contact with the top surface of the first mixing tube (8).

5. A gas delivery device for an anesthesia machine according to claim 4, characterized in that: Along the axis of the second mixing tube (9), a plurality of exhaust ports (10) are arranged at the bottom of the second mixing tube (9).

6. A gas delivery device for an anesthesia machine according to claim 5, characterized in that: Along the airflow direction, the exhaust port (10) is arranged in a cone shape with a large inlet and a small outlet.

7. A gas delivery device for an anesthesia machine according to claim 6, characterized in that: A plurality of support plates (17) are arranged on the bottom surface of the second mixing tube (9), and each of the support plates (17) is provided with an air hole (18); the air holes (18) of any two adjacent support plates (17) are arranged in a staggered manner.

8. The gas delivery device for an anesthesia machine according to claim 1, characterized in that: The outer surface of the temporary storage tank (11) is wrapped with a PTC heating plate (19), and a temperature sensor (20) is also arranged inside the temporary storage tank (11).

9. The gas delivery device for an anesthesia machine according to claim 8, characterized in that: The temporary storage tank (11) comprises an upper tank body (1101) and a lower tank body (1102) which are spliced ​​to each other, and the upper tank body (1101) and the lower tank body (1102) are both provided with a plug-in hole (1103). The rotating roller (12) comprises a roller (1201), and a plurality of driving blades (1202) are provided on the outer circumference of the roller (1201). The upper and lower sides of the roller (1201) are both provided with a rotating shaft (1203) adapted to the plug-in hole (1103).

10. The gas delivery device for an anesthesia machine according to claim 1, characterized in that: An exhaust drum (21) is rotatably provided at the outlet end of the temporary storage tank (11), a plurality of exhaust fan blades (22) are provided on the exhaust drum (21), and a driving motor (23) connected to the exhaust drum (21) is also provided on the temporary storage tank (11).

Images