Respirator for medical care

Abstract

The invention discloses a breathing machine for medical care, which relates to the technical field of medical instruments and comprises an oxygen inhalation mask, an interface part is integrally formed in the oxygen inhalation mask, an exhalation tube is arranged at the bottom end of the interface part, an exhalation valve is arranged on the outer wall of the exhalation tube, a carbon dioxide probe is arranged in the oxygen inhalation mask, and an air outlet groove is formed in the exhalation tube. An annular protruding part is formed on the outer side of the expiration pipe, an annular cavity is formed in the annular protruding part, an air outlet pipe is arranged in the air outlet groove, and a circular plate is arranged at the top end of the inner wall of the annular cavity. The retention time and the mixing efficiency of exhaled gas in the mask are remarkably increased, the concentration of re-inhaled carbon dioxide is improved, when the sectional area is enlarged, the dead cavity flushing effect is accelerated, the retention concentration of the carbon dioxide is reduced, and accurate regulation and control of the retention concentration of the carbon dioxide exhaled by a patient in the dead cavity of the mask are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more particularly, it relates to a breathing machine for medical care. BACKGROUND

[0002] Non-invasive ventilators provide positive pressure ventilation to patients through a mask and are widely used in the treatment of diseases such as sleep apnea and respiratory failure. However, during use, factors such as the design of the exhalation valve can cause unintentional air leakage. When the amount of unintentional air leakage is unstable, it can interfere with the pressure control accuracy of the ventilator, affect the ventilation effect, and even cause discomfort to the patient, such as facial irritation and increased risk of carbon dioxide retention, so it needs to be effectively controlled.

[0003] In view of the problem that the non-invasive ventilator cannot adjust the amount of unintentional air leakage, by designing an exhalation valve with adjustable cross-sectional size, precise and constant control of the amount of unintentional air leakage is achieved, thereby optimizing the pressure stability of the ventilator, meeting the needs of different patients, improving the treatment effect and patient comfort, and solving the shortcomings of the existing exhalation valve in air leakage control. Therefore, the present application provides a breathing machine for medical care. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application aims to provide a breathing machine for medical care.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: including an oxygen inhalation mask, the oxygen inhalation mask is connected to a breathing machine, an interface part is integrally formed in the oxygen inhalation mask, an exhalation tube is arranged at the bottom end of the interface part, an exhalation valve is arranged on the outer wall of the exhalation tube, a carbon dioxide probe is arranged in the oxygen inhalation mask, an air outlet groove is formed in the exhalation tube, a ring protrusion is formed on the outer side of the exhalation tube, a ring cavity is formed in the ring protrusion, the air outlet groove is connected to the ring cavity, an air outlet tube is arranged in the air outlet groove, a circular plate is arranged at the top end of the inner wall of the ring cavity, an auxiliary mechanism for adjusting the flow of the air outlet tube is arranged in the circular plate, the auxiliary mechanism includes a driving member arranged in the ring protrusion, a ring-shaped member is arranged in the circular plate, an adjusting member is arranged on the ring-shaped member, the ring-shaped member and the adjusting member cooperate to adjust the flow of the air outlet tube, further including an adjusting mechanism, the adjusting mechanism includes a rotating member arranged on the circular plate, a supporting member is arranged in the air outlet tube, a resisting member is arranged in the supporting member, a pressing member is further arranged in the supporting member, the resisting member and the rotating member cooperate to control the pressing member.

[0006] Preferably, the air outlet pipe comprises a tapered contraction section, a throat section and a diverging section, the tapered contraction section is provided at the lower end of the interface, the inner diameter of the tapered contraction section linearly decreases along the air flow direction, the throat section is connected to the outlet of the tapered contraction section, the diverging section is connected to the outlet of the throat section, the tapered contraction section is provided with an auxiliary groove, the auxiliary groove is provided with a spiral blade, the upper end of the circular plate is provided with a water collecting plate, the water collecting plate is provided with a water collecting groove, the water collecting plate is correspondingly provided at the lower end surface of the diverging section, the outer side of the water collecting plate is provided with a water film, the inner side of the diverging section is provided with a cleaning strip in a circular manner, and the cleaning strip abuts against the inner side of the water collecting groove.

[0007] Preferably, the driving member comprises a motor provided at the bottom end of the ring protrusion, the rotor shaft of the motor is provided with a rotating rod, the outer wall of the rotating rod is provided with a gear, and the outer wall of the circular plate is provided with a gear ring.

[0008] Preferably, the annular member comprises a protrusion provided at the bottom end of the circular plate, the protrusion is provided with a central hole, the diverging section is correspondingly connected to the central hole, and the outer wall of the protrusion is provided with a plurality of arc-shaped grooves.

[0009] Preferably, the adjusting member comprises two groups of adjusting cover one and adjusting cover two, the adjusting cover one and the adjusting cover two are matched, the adjusting cover one and the adjusting cover two form adjusting parts, the diameter of one group of the adjusting parts is larger than that of the other group, the adjusting member further comprises an adjusting table, the adjusting parts are clamped in the adjusting table, the adjusting table is provided in the annular cavity, the bottom end of the adjusting table is provided with a clamping groove one in a circular manner, the inner side of the adjusting cover one is provided with a locking part one, the side wall of the locking part one is provided with a positioning strip one, the end of the inner side of the adjusting cover one away from the locking part one is provided with an insertion block part one, the inner side of the adjusting cover two is provided with a locking part two, the side wall of the locking part two is provided with a positioning strip two, and the end of the inner side of the adjusting cover two away from the locking part two is provided with an insertion block part two.

[0010] Preferably, the locking part one and the insertion block part two are matched, the locking part two and the insertion block part one are matched, the adjusting cover one and the adjusting cover two are provided with a clamping groove two at the corresponding positions, the insertion block part one and the insertion block part two are correspondingly matched with the clamping groove two, and the positioning strip one and the positioning strip two are slidably connected in the arc-shaped groove.

[0011] Preferably, the rotating member comprises a ring-shaped part provided at the upper end surface of the circular plate, the upper end surface of the ring-shaped part is formed with a wave-shaped groove, and the abutting member is provided at the upper end surface of the wave-shaped groove.

[0012] Preferably, the supporting member comprises supporting parts provided at both sides of the inner wall of the air outlet groove, the supporting parts at both sides form an annular plate, the annular plate is formed with an annular groove, and the annular groove is provided with a through hole in a circular manner.

[0013] Preferably, the abutting piece comprises abutting rods arranged in the two side supporting parts, compression springs are sleeved on the outer walls of the two side abutting rods, the compression springs are arranged at the bottom ends of the two side supporting parts, and the outer walls of the two side abutting rods are provided with abutting parts at corresponding ends.

[0014] Preferably, the extruding piece comprises extruding plates movably connected in the through openings, the two side extruding plates abut against the outside of the throat section at corresponding positions, corresponding movable openings are arranged in the two side extruding plates, and rubber rings are arranged in the two side movable openings.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. In the present application, the effective cross-sectional area of the air outlet pipe is changed by the auxiliary mechanism, the gas flow resistance and the turbulence intensity are dynamically controlled, when the cross-sectional area is reduced, the residence time and the mixing efficiency of the exhaled gas in the mask are significantly increased, so that the concentration of the re-inhaled carbon dioxide is increased, when the cross-sectional area is expanded, the flushing effect of the dead space is accelerated, and the residence concentration of the carbon dioxide is reduced, so that the cross-sectional area structure of the movable air pipe interface is dynamically adjusted, and the residence concentration of the exhaled carbon dioxide of the patient in the mask dead space is accurately and real-timely controlled.

[0017] 2. In the present application, when the patient inhales, the exhalation valve at the oxygen mask interface is automatically closed due to the negative pressure, and the external air flow is blocked, at the same time, the pure oxygen source delivers fresh oxygen into the mask, when the patient exhales, the exhaled gas flow pushes the exhalation valve to open immediately, and the waste gas rich in carbon dioxide is discharged into the exhalation pipe.

[0018] 3. In the present application, when the patient exhales, the gas flow is accelerated in the throat section of the Venturi tube, according to Bernoulli's principle, a local negative pressure is generated, the negative pressure actively sucks the carbon dioxide rich gas retained in the dead space, and the dead space cleaning efficiency of the exhalation phase is improved.

[0019] 4. In the present application, by avoiding the energy loss caused by the fact that the traditional mask relies on the work of the respiratory muscles of the patient to exhaust, the velocity gradient of the gas flow is reduced by the expansion section, the exhalation kinetic energy is converted into pressure potential energy, and the turbulence intensity is simultaneously inhibited, which not only reduces the exhalation resistance of the patient, but also significantly reduces the condensation of water vapor, and improves the long-term wearing comfort.

[0020] 5. In the present application, the cleaning strip inside the gradually expanding section scrapes the water collecting groove, directly scrapes the liquid water film attached to the pipe wall, destroys the surface tension of the water film, forces the water molecules to gather into liquid droplets, stores the liquid in the water film, and finally discharges through the pulse pipe, blocks the breeding of bacteria by condensate water, and further eliminates the risk of patient coughing or alveolar drowning caused by liquid backflow. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1A schematic diagram of a breathing mask of a breathing machine for medical care is provided for the present invention;

[0022] Figure 2 An internal schematic diagram of a breathing machine for medical care is provided for the present invention;

[0023] Figure 3 A partial sectional view schematic diagram of a breathing machine for medical care is provided for the present invention;

[0024] Figure 4 An exhalation tube sectional view schematic diagram of a breathing machine for medical care is provided for the present invention;

[0025] Figure 5 An air outlet tube sectional view schematic diagram of a breathing machine for medical care is provided for the present invention;

[0026] Figure 6 A support schematic diagram of a breathing machine for medical care is provided for the present invention;

[0027] Figure 7 A bottom view schematic diagram of a breathing machine for medical care is provided for the present invention;

[0028] Figure 8 An adjustment mechanism schematic diagram of a breathing machine for medical care is provided for the present invention;

[0029] Figure 9 An auxiliary mechanism schematic diagram of a breathing machine for medical care is provided for the present invention;

[0030] Figure 10 An adjustment schematic diagram of a breathing machine for medical care is provided for the present invention;

[0031] Figure 11 A whole schematic diagram of a breathing machine for medical care is provided for the present invention.

[0032] In the figure: 100, oxygen inhalation mask; 101, interface part; 102, exhalation tube; 103, gas outlet groove; 104, ring convex part; 105, annular cavity; 106, gas outlet tube; 107, circular plate; 108, opening; 109, tapered contraction section; 110, throat section; 111, diverging section; 112, auxiliary groove; 113, spiral fin; 114, water collecting plate; 115, water collecting groove; 116, water film; 117, cleaning strip; 200, auxiliary mechanism; 201, driving piece; 202, annular piece; 203, adjusting piece; 300, adjusting mechanism; 301, rotating piece; 302, supporting piece; 303, abutting piece; 304, extruding piece; 401, exhalation valve; 402, carbon dioxide probe; 201a, motor; 201b, rotating rod; 201c, gear; 201d, gear ring; 202a, protruding part; 202b, central hole; 202c, arc-shaped groove; 203a, adjusting cover one; 203b, adjusting cover two; 203c, adjusting part; 203d, adjusting platform; 203e, clamping groove one; 203f, locking part one; 203g, positioning strip one; 203h, insertion block part one; 203i, locking part two; 203j, positioning strip two; 203k, insertion block part two; 203l, clamping groove two; 301a, annular part; 301b, wave groove; 302a, supporting part; 302b, annular plate; 302c, annular groove; 302d, through opening; 303a, abutting rod; 303b, compression spring; 303c, abutting part; 304a, extruding plate; 304b, movable opening; 304c, rubber ring. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from the description, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0035] Secondly, "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor does it mean an embodiment that is separate or selectively excluded from other embodiments.

[0036] Embodiment 1 further describes a medical care ventilator proposed by the present invention, including an oxygen mask 100, an interface portion 101 integrally formed in the oxygen mask 100, an exhalation tube 102 detachably connected to the bottom end of the interface portion 101, an exhalation valve 401 mounted on the outer wall of the exhalation tube 102, a carbon dioxide probe 402 disposed in the oxygen mask 100, an air outlet groove 103 formed in the exhalation tube 102, an annular convex portion 104 formed on the outer side of the exhalation tube 102, an annular cavity 105 formed in the annular convex portion 104, the air outlet groove 103 communicates with the annular cavity 105, an air outlet tube 106 is fixedly connected to the air outlet groove 103, and a circular plate 107 is rotatably connected to the top end of the inner wall of the annular cavity 105;

[0037] Depend on Figures 1 to 4 As can be seen, the bottom end of the interface portion 101 is detachably connected to an exhalation tube 102, and an exhalation valve 401 is installed on the outer wall of the exhalation tube 102. The exhalation valve 401 and the carbon dioxide probe 402 are prior art. When the patient inhales, the exhalation valve 401 at the interface of the oxygen mask 100 automatically closes due to negative pressure, blocking the inflow of external air. At the same time, a pure oxygen source delivers fresh oxygen into the mask. When the patient exhales, the exhaled airflow pushes the exhalation valve 401 to open immediately, allowing the waste gas rich in carbon dioxide to be discharged into the exhalation tube 102 in a directionally controlled manner.

[0038] The oxygen mask 100 is connected to the ventilator pipeline via the expiratory tube 102. During daily use, since some patients are in a state of hypercapnia for a long time, the respiratory center's sensitivity to carbon dioxide decreases. When offline, mild hypercapnia needs to be maintained to avoid ventilator dependence caused by a sudden drop in respiratory drive. In addition, the ventilation strategy for patients with acute respiratory tract infections requires low tidal volume, which can easily cause carbon dioxide retention. Therefore, the carbon dioxide concentration in the respiratory mask needs to be reduced to prevent hypercapnia from aggravating lung damage.

[0039] The device is provided with an auxiliary mechanism 200, which includes a driving member 201 arranged in the annular convex portion 104, an annular member 202 arranged in the circular plate 107, and an adjusting member 203 arranged on the annular member 202. The annular member 202 and the adjusting member 203 cooperate to adjust the flow rate of the outlet pipe 106. During specific use, its carbon dioxide sensor monitors the gas concentration in the oxygen mask 100 in real time to ensure the patient's breathing safety, and transmits the concentration data to the control system in real time. The control system changes the effective cross-sectional area of ​​the outlet pipe 106 through the auxiliary mechanism 200 to dynamically control the gas flow resistance and turbulence intensity. When the cross-sectional area is reduced, the residence time and mixing efficiency of the exhaled gas in the mask are significantly increased, thereby increasing the concentration of re-inhaled carbon dioxide. When the cross-sectional area is expanded, the dead space flushing effect is accelerated, and the retained carbon dioxide concentration is reduced. In this way, through the dynamically adjustable tracheal interface cross-sectional area structure, the retained concentration of the patient's exhaled carbon dioxide in the dead space of the mask is accurately and real-timely regulated, breaking through the limitation of traditional respiratory masks that rely on external air circuits or additional equipment.

[0040] At the same time, the device is also provided with an adjusting mechanism 300, which includes a rotating piece 301 arranged on the circular plate 107, a supporting piece 302 arranged in the air outlet pipe 106, a resisting piece 303 arranged in the supporting piece 302, and an extruding piece 304 also arranged in the supporting piece 302. The resisting piece 303 and the rotating piece 301 cooperate to control the extruding piece 304. The cross-sectional area of the air outlet pipe 106 is changed by the Venturi tube. As can be seen, the airflow is accelerated in the middle of the air outlet pipe 106 when the patient exhales.

[0041] The air outlet pipe 106 includes a tapered contraction section 109, a throat section 110, and a gradual expansion section 111. The tapered contraction section 109 is arranged at the lower end of the interface part 101, and the inner diameter thereof linearly decreases along the airflow direction. The throat section 110 is connected to the outlet of the tapered contraction section 109, and the gradual expansion section 111 is connected to the outlet of the throat section 110.

[0042] When the patient exhales, the airflow is accelerated in the throat section 110 of the Venturi tube, and according to Bernoulli's principle, a local negative pressure is generated. This negative pressure actively pumps the carbon dioxide-rich gas retained in the dead space, thereby improving the dead space clearance efficiency during exhalation. At the same time, the energy loss caused by the traditional mask relying on the patient's respiratory muscles to exhaust air is avoided. The expansion section reduces the airflow velocity gradient, converts the exhalation kinetic energy into pressure potential energy, and synchronously suppresses the turbulence intensity. This not only reduces the patient's exhalation resistance, but also significantly reduces the water vapor condensation, thereby improving the long-term wearing comfort.

[0043] Working principle: In summary, the device can be divided into three modes. When the patient inhales, the exhalation valve 401 at the interface of the oxygen mask 100 automatically closes due to the negative pressure effect, blocking the inflow of external air. At the same time, the pure oxygen source delivers fresh oxygen into the mask. When the patient exhales, the exhaled airflow pushes the exhalation valve 401 to immediately open, allowing the waste gas rich in carbon dioxide to be directed into the air outlet pipe 102. For patients with hypercapnia, the auxiliary mechanism 200 changes the effective cross-sectional area of the air outlet pipe 106, dynamically controls the gas flow resistance and turbulence intensity, and significantly increases the retention time and mixing efficiency of the exhaled gas in the mask when the cross-sectional area is reduced, thereby increasing the concentration of inhaled carbon dioxide. For patients with acute respiratory distress, the auxiliary mechanism 200 expands the cross-sectional area, accelerates the dead space flushing effect, and reduces the concentration of carbon dioxide retention. Thus, through the dynamically adjustable air pipe cross-sectional area structure, the concentration of carbon dioxide retained in the dead space of the mask is precisely and real-time regulated.

[0044] Example two

[0045] On the basis of embodiment one, increase the following technical features: the driving member 201 includes a motor 201a detachably mounted at the bottom end of the ring convex portion 104, the rotor shaft end of the motor 201a is fixedly connected with a rotating rod 201b, the outer wall of the rotating rod 201b is keyed with a gear 201c, the outer wall of the circular plate 107 is fixedly connected with a gear ring 201d, the gear ring 201d is engaged with the gear 201c, the annular member 202 includes a protruding portion 202a integrally formed at the bottom end of the circular plate 107, the protruding portion 202a is provided with a central hole 202b in the inside, the gradually expanding section 111 is correspondingly communicated with the central hole 202b, and the outer wall of the protruding portion 202a is provided with a plurality of arc-shaped grooves 202c;

[0046] The ring convex portion 104 is formed with a cylindrical annular cavity 105, and the motor 201a is detachably mounted at the bottom end of the ring convex portion 104. The motor 201a is started by the corresponding controller, the motor 201a drives the rotating rod 201b to rotate, the rotating rod 201b drives the gear 201c to rotate, and since the gear ring 201d is engaged with the gear 201c, the gear ring 201d drives the circular plate 107 to rotate. The circular plate 107 drives the protruding portion 202a to rotate at the same time. The protruding portion 202a is a cylindrical structure, and four arc-shaped grooves 202c are arranged on the outer side thereof. Meanwhile, a cylindrical central hole 202b is formed at the center thereof, and the airflow is discharged from the central hole 202b. Through the cross-sectional area of the dynamically adjustable central hole 202b, the limitation of the traditional breathing mask relying on the external air path or additional equipment is broken;

[0047] The adjusting member 203 includes two groups of adjusting covers 1 203a and adjusting covers 203b, the adjusting covers 1 203a and the adjusting covers 203b cooperate with each other, and the adjusting covers 1 203a and the adjusting covers 203b form an adjusting portion 203c, wherein the diameter of one group of adjusting portions 203c is larger than that of the other group, and further includes an adjusting platform 203d, the adjusting portion 203c is stuck in the adjusting platform 203d, and the adjusting platform 203d is fixedly connected to the annular cavity 105, and the bottom end of the adjusting platform 203d is circumferentially provided with a card groove 203e, the inner side of the adjusting cover 1 203a is provided with a locking portion 203f, and the side wall of the locking portion 203f is provided with a positioning strip 203g, and the inner end of the adjusting cover 1 203a away from the locking portion 203f is fixedly connected It is connected to an inserting block part 1 203h, a locking part 203i is fixedly connected to the inner side of the adjusting cover 203b, a positioning strip 203j is fixedly connected to the side wall of the locking part 203i, an inserting block part 203k is fixedly connected to the end of the inner side of the adjusting cover 203b away from the locking part 203i, the locking part 1 203f and the inserting block part 203k cooperate with each other, the locking part 203i cooperates with the inserting block part 1 203h, the corresponding positions of the adjusting cover 1 203a and the adjusting cover 203b are provided with a second card groove 203l, the inserting block part 1 203h and the inserting block part 203k cooperate with the second card groove 203l, and the positioning strip 1 203g and the positioning strip 2 203j are correspondingly slidably connected in the arc groove 202c;

[0048] Depend on Figures 4 to 10 It can be seen that the adjustment portion 203c is composed of two groups of adjustment covers 1 203a and 203b. The adjustment cover 1 203a and the adjustment cover 2 203b form two groups of adjustment portions 203c. The diameter of one group of adjustment portions 203c is larger than the diameter of the other group, which is convenient for the two groups of adjustment portions 203c to cooperate with each other, and the smaller diameter is inserted into the larger diameter adjustment portion 203c. The adjustment cover 1 203a and the adjustment cover 2 203b rotate with each other, and the adjustment cover 1 203a and At the corresponding position of the second adjustment cover 203b, the locking portion 1 203f and the second inserting block 203k cooperate, and the locking portion 203i cooperates with the first inserting block 203h. In this way, the first adjustment cover 203a and the second adjustment cover 203b can rotate relative to each other, and the first inserting block 203h and the second inserting block 203k cooperate with the second locking groove 203l. At the same time, the protrusions 202a of the first inserting block 203h and the second inserting block 203k are respectively engaged in the first locking groove 203e.

[0049] Because the side wall of the locking part two 203i is fixedly connected with the positioning strip two 203j, the side wall of the locking part one 203f is fixedly connected with the positioning strip one 203g, and the positioning strip one 203g and the positioning strip two 203j are slidingly connected in the arc-shaped groove 202c, when the circular plate 107 drives the arc-shaped groove 202c on the protruding part 202a to rotate synchronously, because of the deflection force of the arc-shaped groove 202c, the positioning strip one 203g and the positioning strip two 203j deflect along the arc of the arc-shaped groove 202c, thereby driving the two groups of adjusting parts 203c to rotate relative to each other, and Figures 6 to 9 It can be known that the adjusting cover one 203a and the adjusting cover two 203b rotate relative to each other, thereby adjusting the opening size of the central hole 202b, when rotating clockwise, the opening size of the central hole 202b is the largest, and when rotating counterclockwise, the central hole 202b is closed;

[0050] Working principle: as can be known from the above, when the cross-sectional area of the air outlet pipe 106 needs to be adjusted, the motor 201a is started through the external controller, the motor 201a drives the rotating rod 201b to rotate, the rotating rod 201b drives the gear 201c to rotate, because the gear ring 201d is engaged with the gear 201c, the gear ring 201d drives the circular plate 107 to rotate, the circular plate 107 rotates while driving the protruding part 202a to rotate, the protruding part 202a is a cylindrical structure, four groups of arc-shaped grooves 202c are arranged on the protruding part 202a, because the side wall of the locking part two 203i is fixedly connected with the positioning strip two 203j, the side wall of the locking part one 203f is fixedly connected with the positioning strip one 203g, and the positioning strip one 203g and the positioning strip two 203j are slidingly connected in the arc-shaped groove 202c, when the circular plate 107 drives the arc-shaped groove 202c on the protruding part 202a to rotate synchronously, because of the deflection force of the arc-shaped groove 202c, the positioning strip one 203g and the positioning strip two 203j deflect along the arc of the arc-shaped groove 202c, thereby driving the two groups of adjusting parts 203c to rotate relative to each other, at this time, the adjusting cover one 203a and the adjusting cover two 203b rotate relative to each other, thereby adjusting the opening size of the central hole 202b, through the dynamically adjustable cross-sectional area of the central hole 202b, the precise and real-time regulation and control of the concentration of the carbon dioxide exhaled by the patient in the mask dead space is realized, and the limitation of the traditional breathing mask depending on the external gas circuit or additional equipment is broken through.

[0051] Embodiment three

[0052] On the basis of the embodiment two, the following technical features are added: the rotating part 301 includes a ring-shaped part 301a fixedly connected to the upper end face of the circular plate 107, a wave groove 301b is formed on the upper end face of the ring-shaped part 301a, the abutting part 303 is arranged on the upper end face of the wave groove 301b, and Figures 4 to 5It can be known that the annular part 301a is fixedly connected to the upper end face of the circular plate 107, and the annular part 301a is synchronously rotated with the circular plate 107, and the upper end face of the annular part 301a is formed with a wave groove 301b, the wave groove 301b has a high position surface, an inclined surface and a low position surface, and the high position surface, the inclined surface and the low position surface are respectively contacted with the abutting rods 303a with the rotation of the annular part 301a;

[0053] The support 302 comprises support parts 302a fixedly connected to the inner walls of the air outlet groove 103, and an annular plate 302b is formed between the two support parts 302a, and an annular groove 302c is formed in the annular plate 302b, and a through port 302d is arranged in the annular groove 302c in a circle, the abutting part 303 comprises abutting rods 303a movably connected in the two support parts 302a, and compression springs 303b are sleeved on the outer walls of the two abutting rods 303a, the compression springs 303b are carbon springs, which are high in strength and convenient for daily use, and the compression springs 303b are fixedly connected to the bottom ends of the two support parts 302a, and the abutting parts 303c are fixedly connected to the corresponding ends of the outer walls of the two abutting rods 303a;

[0054] By Figures 4 to 8 It can be known that the support parts 302a and the annular plate 302b are fixedly connected to the inner walls of the air outlet groove 103, which provides support force for the subsequent device, and the abutting rods 303a are connected to the support parts 302a in the vertical direction through the compression springs 303b, when the high position surface on the annular part 301a is contacted with the abutting rods 303a, the abutting rods 303a are moved upward under the extrusion force, and the abutting parts 303c on the side walls of the abutting rods 303a are synchronously moved, when the low position surface is contacted with the abutting rods 303a, the abutting rods 303a are moved downward under the action of the compression springs 303b, and the abutting parts 303c are semicircular structures, which are contacted with the extruding part 304 in use;

[0055] The extruding part 304 comprises extruding plates 304a movably connected in the through port 302d, the two extruding plates 304a are abutted on the outer sides of the throat sections 110 in correspondence, and the two extruding plates 304a are correspondingly provided with movable ports 304b in the inside, and the rubber rings 304c are fixedly connected in the two movable ports 304b, Figures 4 to 7 It can be known that the extruding plates 304a are movably connected in the through port 302d, the movable ports 304b in the form of a square frame are formed in the extruding plates 304a, and the extruding plates 304a are limited in the through port 302d through the rubber rings 304c;

[0056] Working principle: As can be seen from the above, in use, the motor 201a drives the rotating rod 201b to rotate, the rotating rod 201b drives the gear 201c to rotate, and the gear ring 201d is engaged with the gear 201c, so the gear ring 201d drives the circular plate 107 to rotate, and the upper end surface of the circular plate 107, when the circular plate 107 rotates, synchronously drives the annular part 301a to rotate, the upper end surface of the annular part 301a is formed with a wave groove 301b, the wave groove 301b has a high surface, an inclined surface and a low surface, with the rotation of the annular part 301a, the high surface, the inclined surface and the low surface are respectively in contact with the abutting rod 303a, when the high surface on the annular part 301a is in contact with the abutting rod 303a, under the extrusion force, the abutting rod 303a is driven to move upward, the abutting part 303c on the side wall of the abutting rod 303a synchronously moves, when the low surface is in contact with the abutting rod 303a, the abutting rod 303a is driven to move downward under the action of the compression spring 303b, the abutting part 303c on the abutting rod 303a is semicircular, when the abutting rod 303a moves upward, it is in contact with the extrusion plate 304a, thereby driving the two groups of extrusion plates 304a to move to the center, thus extruding the throat position of the air outlet pipe 106, so that the dead space clearance efficiency is improved when exhaling, and the energy loss caused by the traditional mask relying on the patient's respiratory muscle to exhaust is avoided, the expansion section reduces the air flow velocity gradient, converts the exhaling kinetic energy into pressure potential energy, and synchronously suppresses the turbulence intensity, which not only reduces the patient's exhaling resistance, but also significantly reduces the water vapor condensation, and improves the long-term wearing comfort.

[0057] Embodiment four

[0058] On the basis of embodiment three, the following technical features are added: the air outlet pipe 106 comprises a tapered contraction section 109, a throat section 110 and a gradual expansion section 111, the tapered contraction section 109 is arranged at the lower end of the interface part 101, the inner diameter of the tapered contraction section 109 linearly decreases along the air flow direction, the throat section 110 is connected to the outlet of the tapered contraction section 109, the gradual expansion section 111 is connected to the outlet of the throat section 110, the tapered contraction section 109 is provided with an auxiliary groove 112, the auxiliary groove 112 is fixedly connected with a helical blade 113, the upper end of the circular plate 107 is fixedly connected with a water collecting plate 114, the water collecting plate 114 is formed with a water collecting groove 115, the water collecting plate 114 is arranged corresponding to the lower end surface of the gradual expansion section 111, the water collecting plate 114 is provided with a water film 116 outside, and the gradual expansion section 111 is fixedly connected with a cleaning strip 117 on the inside in a circle, and the cleaning strip 117 abuts against the inside of the water collecting groove 115.

[0059] From Figure 6It can be known that the conical contraction section 109 is provided with an annular auxiliary groove 112, and a helical blade 113 is rotatably connected in the auxiliary groove 112. When exhaling and inhaling, the water mist outside the helical blade 113 is guided into the inner wall of the air outlet pipe 106 through the helical blade 113, and then the water mist condenses into water droplets and falls into the water collecting groove 115. The device is provided with a water collecting plate 114 which rotates synchronously with the circular plate 107. At this time, the cleaning strip 117 on the inner side of the gradually expanding section 111 scrapes the water collecting groove 115, directly scrapes the liquid water film attached to the pipe wall, destroys the surface tension of the water film, forces the water molecules to gather into droplets, so that the liquid is stored in the water film 116, and finally discharged through the pulse tube. In this way, the water vapor in the breathing machine exhaust pipe can be reduced, which can significantly improve the treatment safety and effectiveness by blocking the condensate water to breed bacteria, and further eliminate the risk of patient coughing or lung drowning caused by liquid backflow.

[0060] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principles of the present application shall also be considered as the protection scope of the present application.

Claims

1. A medical care ventilator, comprising an oxygen mask (100), wherein the oxygen mask (100) is connected to the ventilator, wherein an interface portion (101) is integrally formed in the oxygen mask (100), an exhalation tube (102) is provided at the bottom end of the interface portion (101), an exhalation valve (401) is provided on the outer wall of the exhalation tube (102), and a carbon dioxide probe (402) is provided in the oxygen mask (100), characterized in that: An air outlet groove (103) is formed in the exhalation tube (102), an annular convex portion (104) is formed on the outside of the exhalation tube (102), an annular cavity (105) is formed in the annular convex portion (104), the air outlet groove (103) is connected to the annular cavity (105), an air outlet pipe (106) is provided in the air outlet groove (103), and a circular plate (107) is provided at the top end of the inner wall of the annular cavity (105); An auxiliary mechanism (200) for regulating the flow rate of the air outlet pipe (106) is provided in the circular plate (107), the auxiliary mechanism (200) comprising a driving member (201) provided in the annular convex portion (104), an annular member (202) provided in the circular plate (107), an adjusting member (203) provided on the annular member (202), and the annular member (202) and the adjusting member (203) cooperate to regulate the flow rate of the air outlet pipe (106); The device further comprises an adjusting mechanism (300), wherein the adjusting mechanism (300) comprises a rotating member (301) arranged on a circular plate (107), a supporting member (302) is arranged in the air outlet pipe (106), a resisting member (303) is arranged in the supporting member (302), and an extruding member (304) is further arranged in the supporting member (302), and the resisting member (303) and the rotating member (301) cooperate to control the extruding member (304).

2. A medical care ventilator according to claim 1, characterized in that: The air outlet pipe (106) comprises a conical contraction section (109), a throat section (110) and a gradually expanding section (111), wherein the inlet end of the conical contraction section (109) is arranged at the lower end of the interface portion (101), and the inner diameter thereof decreases linearly along the airflow direction, the throat section (110) is connected to the outlet of the conical contraction section (109), and the gradually expanding section (111) is connected to the outlet of the throat section (110), and an auxiliary groove (112) is provided in the conical contraction section (109), and the auxiliary groove (112) is provided in the auxiliary groove (112). 12) is provided with a spiral piece (113), a water collecting plate (114) is provided at the upper end of the circular plate (107), a water collecting trough (115) is formed in the water collecting plate (114), the water collecting plate (114) is provided at the lower end surface of the gradually expanding section (111), a water film (116) is provided on the outside of the water collecting plate (114), a cleaning strip (117) is provided in a circular shape on the inside of the gradually expanding section (111), and the cleaning strip (117) is against the inside of the water collecting trough (115).

3. A medical care ventilator according to claim 2, characterized in that: The driving member (201) comprises a motor (201a) arranged at the bottom end of the annular convex portion (104); a rotating rod (201b) is arranged at the rotor shaft end of the motor (201a); a gear (201c) is arranged on the outer wall of the rotating rod (201b); a gear ring (201d) is arranged on the outer wall of the circular plate (107); and the gear ring (201d) is engaged with the gear (201c).

4. A medical care ventilator according to claim 3, characterized in that: The annular member (202) comprises a protruding portion (202a) arranged at the bottom end of the circular plate (107), a central hole (202b) being provided in the protruding portion (202a), the gradually expanding section (111) correspondingly communicating with the central hole (202b), and a plurality of groups of arc-shaped grooves (202c) being provided on the outer wall of the protruding portion (202a).

5. A medical care ventilator according to claim 4, characterized in that: The adjusting member (203) comprises two groups of adjusting covers (1) (203a) and (203b), wherein the adjusting covers (1) (203a) and (203b) cooperate with each other, and the adjusting covers (1) (203a) and (203b) form an adjusting portion (203c), wherein the diameter of the adjusting portion (203c) of one group is larger than that of the other group, and further comprises an adjusting platform (203d), wherein the adjusting portion (203c) is clamped in the adjusting platform (203d), and the adjusting platform (203d) is arranged in the annular cavity (105), and a clamping groove (103d) is provided on the bottom end of the adjusting platform (203d) in a circumferential manner. (203e), a locking portion (203f) is provided on the inner side of the adjusting cover (203a), a positioning strip (203g) is provided on the side wall of the locking portion (203f), an insert block (203h) is provided on the inner side of the adjusting cover (203a) at one end away from the locking portion (203f), a locking portion (203i) is provided on the inner side of the adjusting cover (203b), a positioning strip (203j) is provided on the side wall of the locking portion (203i), and an insert block (203k) is provided on the inner side of the adjusting cover (203b) at one end away from the locking portion (203i).

6. A medical care ventilator according to claim 5, characterized in that: The locking portion 1 (203f) cooperates with the inserting block portion 2 (203k), the locking portion 2 (203i) cooperates with the inserting block portion 1 (203h), the corresponding positions of the adjusting cover 1 (203a) and the adjusting cover 2 (203b) are provided with a card slot 2 (203l), the inserting block portion 1 (203h) and the inserting block portion 2 (203k) cooperate with the card slot 2 (203l), and the positioning strip 1 (203g) and the positioning strip 2 (203j) are correspondingly slidably connected in the arc groove (202c).

7. A medical care ventilator according to claim 6, characterized in that: The rotating member (301) comprises an annular portion (301a) arranged on the upper end surface of the circular plate (107), a wave groove (301b) is formed on the upper end surface of the annular portion (301a), and the resisting member (303) is arranged on the upper end surface of the wave groove (301b).

8. A medical care ventilator according to claim 7, characterized in that: The support member (302) comprises support portions (302a) arranged on both sides of the inner wall of the air outlet groove (103), an annular plate (302b) is formed between the support portions (302a) on both sides, an annular groove (302c) is formed in the annular plate (302b), and a through opening (302d) is circumferentially provided in the annular groove (302c).

9. A medical care ventilator according to claim 8, characterized in that: The resisting member (303) comprises resisting rods (303a) arranged in the supporting parts (302a) on both sides, compression springs (303b) are sleeved on the outer walls of the resisting rods (303a) on both sides, and the compression springs (303b) are arranged at the bottom ends of the supporting parts (302a) on both sides, and resisting parts (303c) are arranged at the corresponding ends of the outer walls of the resisting rods (303a) on both sides.

10. A medical care ventilator according to claim 9, characterized in that: The extrusion member (304) includes an extrusion plate (304a) movably connected to the through opening (302d), the extrusion plates (304a) on both sides correspondingly abut against the outside of the throat section (110), and movable openings (304b) are correspondingly provided in the extrusion plates (304a) on both sides, and rubber rings (304c) are provided in the movable openings (304b) on both sides.

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