CN219090716U - Air-oxygen mixing structure of breathing machine - Google Patents

Abstract

The utility model provides an air-oxygen mixing structure of a respirator, which can realize more uniform mixing of air and oxygen; the oxygen pipe comprises a first pipe body, wherein an oxygen conveying pipe is sleeved in the first pipe body, the front end of the oxygen conveying pipe is provided with a conical part, and the pipe wall of the conical part is provided with a conveying hole; a mixing cavity is formed in the first tube body and located at the front end of the conical portion. This application sets up toper portion and sets up the delivery port on the pipe wall of toper portion based on oxygen conveyer pipe front end to this lets the initial direction of motion of most oxygen before mixing be mutually perpendicular with the initial direction of motion of air, then mixes in entering into the mixing chamber along with the air, improves the degree of consistency that air and oxygen mix.

Description

Air-oxygen mixing structure of breathing machine

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a breathing machine, and especially relates to an air-oxygen mixing structure of the breathing machine.

Background

In modern clinical medicine, as an effective means capable of replacing autonomous ventilation function artificially, a respirator is widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation, and has a very important position in the field of modern medicine, and is a vital medical device capable of preventing and treating respiratory failure, reducing complications and saving and prolonging the life of patients.

The respirators are classified into various types, such as adult or child respirators according to application scenes, positive pressure respirators or negative pressure respirators according to ventilation types, and the like, but the respirators comprise components such as a gas source, an exhalation valve, an inhalation valve, a flow valve, a controller and the like, wherein the gas source is regarded as a core component of the respirators.

The utility model discloses a prior patent document CN201610402364.1, which provides an air-oxygen mixing structure for a breathing machine and the breathing machine, wherein the air-oxygen mixing structure comprises an air flow detection cavity, an oxygen flow guide cavity, an air flow guide cavity and a mixing cavity; the inlet end of the air flow detection cavity is an air inlet, and the outlet end of the air flow detection cavity is communicated with the inlet end of the air diversion cavity; the air flow detection cavity is internally provided with a pressure drop perforated wall, and the front side and the rear side of the pressure drop perforated wall are respectively provided with a first flow detection port and a second flow detection port; the air diversion cavity is a cylindrical cavity, the oxygen diversion cavity is a circular annular cavity arranged at the periphery of the air diversion cavity, and an oxygen inlet is arranged on the outer wall of the oxygen diversion cavity; the inlet ends of the oxygen mixing diversion cavity and the air mixing diversion cavity are respectively communicated with the oxygen diversion cavity and the air diversion cavity, and the outlet ends of the oxygen mixing diversion cavity and the air mixing diversion cavity are communicated to the mixing cavity; the outlet end of the mixing cavity is provided with a mixing perforated wall. Although the structure can realize air-oxygen mixing, the air-oxygen mixing device has a sleeve-shaped structure which is almost coaxial due to the flow guide cavities of air and oxygen, so that the mixing area at the front end can show the phenomenon that the air-oxygen mixing is uneven at the central part and the edge part of the mixing area.

Therefore, how to improve the air-oxygen mixing uniformity of the respirator is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The utility model aims to solve the technical problems in the prior art and provides an air-oxygen mixing structure of a breathing machine, which can realize more uniform mixing of air and oxygen.

The technical scheme of the utility model is realized by the following measures that the air-oxygen mixing structure of the breathing machine comprises a first pipe body, wherein an oxygen conveying pipe is sleeved in the first pipe body, the front end of the oxygen conveying pipe is provided with a conical part, and the pipe wall of the conical part is provided with a conveying hole; a mixing cavity is formed in the first tube body and located at the front end of the conical portion.

Further, the conveying hole is in a horn mouth shape.

Further, the mixing chamber is provided with a constriction.

Further, an enlarged portion is provided at the front end of the constriction portion.

Further, a first mounting portion is provided on the outer side of the first tube body.

In specific use, the first pipe body is of a cylindrical tubular structure, the first pipe body is internally sleeved with the oxygen conveying pipe for conveying oxygen, the residual space in the first pipe body is the same as conveying air, the front end of the oxygen conveying pipe is provided with the conical part, specifically, the aperture of the front end of the oxygen conveying pipe is gradually reduced, and meanwhile, the side wall of the conical part is also provided with the conveying hole; by utilizing the combination of the conical part and the conveying hole, more oxygen is output outwards along the conveying hole after the oxygen reaches the conical part; at this time, a mixing cavity is formed in the first tube body at the front end of the conical portion, so that air and oxygen are fully mixed.

The beneficial effect that this application reached is: the conical part is arranged at the front end of the oxygen conveying pipe, and the conveying holes are formed in the pipe wall of the conical part, so that the initial movement direction of most of oxygen before mixing is perpendicular to the initial movement direction of air, and then the oxygen is mixed along with the air entering the mixing cavity, and the mixing uniformity of the air and the oxygen is improved.

Description of the drawings:

FIG. 1 is a first schematic illustration of the connection of the air-oxygen mixing structure components of the ventilator of the present utility model;

fig. 2 is a second schematic illustration of the connection of the air-oxygen mixing structure components of the ventilator of the present utility model.

Fig. 3 is a third schematic illustration of the connection of the air-oxygen mixing structure components of the ventilator of the present utility model.

Reference numerals:

200 first tube body, 201 first mounting portion, 210 oxygen delivery tube, 220 conical portion, 221 delivery hole, 230 mixing chamber, 231 constriction, 232 enlargement.

Detailed Description

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1-3, the embodiment discloses an air-oxygen mixing structure of a respirator, which comprises a first pipe body 200, wherein an oxygen delivery pipe 210 is sleeved in the first pipe body 200, a conical part 220 is arranged at the front end of the oxygen delivery pipe 210, and a delivery hole 221 is arranged on the pipe wall of the conical part 220; a mixing chamber 230 is formed in the first tube 200 at the front end of the tapered portion 220.

The first pipe body 200 is in a cylindrical tubular structure, an oxygen delivery pipe 210 is sleeved in the first pipe body 200 and used for delivering oxygen, and the rest space in the first pipe body 200 is used for delivering air, wherein the front end of the oxygen delivery pipe 210 is provided with a conical part 220, specifically, the aperture of the front end of the oxygen delivery pipe 210 is gradually reduced, and meanwhile, the side wall of the conical part 220 is also provided with a delivery hole 221; by utilizing the combination of the conical part 220 and the delivery hole 221, after the oxygen reaches the conical part 220, more oxygen is output outwards along the delivery hole 221 due to the reduction of the aperture, so that the initial movement direction of most of oxygen before mixing is perpendicular to the initial movement direction of air; at this time, the mixing chamber 230 is formed at the front end of the tapered portion 220 in the first tube 200, so that the air and the oxygen are fully mixed, and the uniformity of mixing the air and the oxygen is improved. The axis of the delivery aperture 221 may alternatively intersect the axis of the cone 220, in use, perpendicular or at another angle, wherein air and oxygen mixing is better when the two axes are perpendicular.

The present application sets up toper portion 220 in front of oxygen carrier tube 210, sets up simultaneously at toper portion 220 department and carries hole 221, improves on the one hand and reduces the phenomenon that adopts prior art structure central zone to exist the oxygen tolerance big, has increased the marginal zone oxygen tolerance simultaneously to this lets air and oxygen mix more even at mixing chamber 230.

In this application, the oxygen delivery pipe 210 may be connected to the first pipe body 200 by direct welding, as shown in fig. 1 and 2, and a sealing device should be further disposed at the connection between the oxygen delivery pipe 210 and the first pipe body 200. In addition, in order to further improve the mixing effect of oxygen and air, the axis of the selected cone 220 may be optionally coincident with the axis of the first tube 200, and a plurality of delivery holes may be uniformly formed on the circumference of the cone 220, so that the mixing effect of air and oxygen may be improved; and a cylindrical portion integrally formed with the tapered portion 220 at the rear end of the tapered portion 220 should be further provided so that oxygen can be more smoothly and effectively transferred to the tapered portion 220, thereby improving the mixing effect of air and oxygen.

Further, in other embodiments of the present application, the delivery hole 221 has a bell mouth shape. Specifically, in the present application, the bell mouth shape means that the opening at one end in the oxygen delivery pipe 210 is smaller, and the opening at one end outside the oxygen delivery pipe 210 is larger, so that the speed of the bell mouth shape is reduced in the stage of flowing through the bell mouth relative to the air in the oxygen delivery pipe 210, but the pressure is relatively increased, thereby further improving the disorder of the oxygen after being discharged from the delivery holes 221, and also enabling the air and the oxygen to be mixed more uniformly.

Further, in other embodiments of the present application, the mixing chamber 230 is provided with a constriction 231. Referring to fig. 2, the constriction 231 is located at the front end of the oxygen delivery pipe 210, wherein oxygen is mixed with air after being discharged from the oxygen delivery pipe 210, and by providing the constriction 231 in the front end of the oxygen delivery pipe 210, that is, the mixing chamber 230, the cross-sectional area is reduced by the constriction 231, so that oxygen and air can be more sufficiently mixed.

Still further, in other embodiments of the present application, the front end of the tightening part 231 is provided with an expanding part 232. The mixing chamber 230 includes an expansion part 232 at the front end of the constriction part 231 in addition to the constriction part 231, and mixes the gases by utilizing the change of the flow rate and the pressure of the fluid, that is, the pressure becomes higher and the flow rate is lower when the gases flow from the constriction part 231 to the expansion part 232, so that the uniformity of mixing the oxygen and the air can be further improved; in the present embodiment, by using the combination of the constriction 231 and the expansion 232, after the oxygen comes out of the oxygen delivery tube 210 and forms a mixed gas with the air, the mixed gas enters the constriction 231, and as the cross-sectional area of the constriction 231 is reduced, the gas flow rate is increased, the pressure is reduced, and the air and the oxygen can be further premixed by diffusion; after the mixed gas passes through the throat pipe, the sectional area is suddenly increased, the gas flow speed is reduced, the pressure is increased, and the mixing of air and oxygen can be further promoted, so that the air and the oxygen are more uniformly mixed.

Further, in other embodiments of the present application, the first mounting portion 201 is disposed outside the first pipe body 200. In a specific use, the first tube 200 may be used as a separate component, that is, may be used as a component structure of the ventilator, and may be connected to other components of the ventilator by using the first mounting portion 201 provided outside the first tube 200. The first mounting portion 201 may be a snap-fit type, or may be any other connection.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (6)

1. An empty oxygen mixed structure of breathing machine, its characterized in that: the oxygen pipe comprises a first pipe body (200), wherein an oxygen conveying pipe (210) is sleeved in the first pipe body (200), a conical part (220) is arranged at the front end of the oxygen conveying pipe (210), and conveying holes (221) are formed in the pipe wall of the conical part (220); a mixing cavity (230) is formed in the first pipe body (200) and positioned at the front end of the conical part (220).

2. The ventilator air-oxygen mixing structure of claim 1, wherein: the conveying hole (221) is in a horn mouth shape.

3. A ventilator air-oxygen mixing structure according to claim 1 or 2, characterized in that: the mixing chamber (230) is provided with a constriction (231).

4. A ventilator air-oxygen mixing structure according to claim 3, wherein: an enlarged portion (232) is provided at the front end of the tightening portion (231).

5. A ventilator air-oxygen mixing structure as claimed in claim 1, 2 or 4, wherein: a first mounting part (201) is arranged on the outer side of the first pipe body (200).

6. A ventilator air-oxygen mixing structure according to claim 3, wherein: a first mounting part (201) is arranged on the outer side of the first pipe body (200).

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