Oxygen concentration stabilizing valve and respiratory support equipment

Abstract

The invention relates to the technical field of respiratory support equipment, in particular to an oxygen concentration stabilizing valve and respiratory support equipment. The oxygen concentration stabilizing valve comprises a valve body, a cylinder is arranged in the valve body, the two end faces of the cylinder are in sealed connection with the inner side face of the valve body, and an air outlet is formed in the end face, corresponding to the cylinder, of the side face of the valve body; an air inlet is formed in the side face of the valve body, a blocking piece used for separating the oxygen inlet channel from the air outlet is installed in the cylinder body, a gap with the variable size exists between the blocking piece and the inner end face of the oxygen inlet channel, and a first through hole is formed in the position, corresponding to the oxygen inlet channel, of the side face of the cylinder body. A second through hole is formed in the position, corresponding to the air outlet, of the side face of the barrel; the size of the gap is changed through the blocking piece, so that the proportion of oxygen and air entering the valve body can be maintained in a preset range, and the use requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of respiratory support equipment, and in particular to an oxygen concentration stabilizing valve and a respiratory support equipment. Background Art

[0002] The air-oxygen mixed gas provided by the ventilator is a mixture of high-concentration oxygen and air. During the mixing process, the flow rate of high-concentration oxygen often does not change after a specific adjustment, and the flow rate of inhaled air is related to the pressure in the breathing circuit. The greater the pressure, the greater the flow rate of inhaled air; the smaller the pressure, the smaller the flow rate of inhaled air. When the flow rate of high-concentration oxygen remains unchanged, changes in the pressure of the breathing circuit will cause a significant change in the concentration of mixed oxygen, which is not conducive to normal oxygen therapy.

[0003] The invention discloses an air-oxygen mixing structure for a ventilator and a ventilator with application number CN201610402364.1, which comprises an air flow detection chamber, an oxygen guide chamber, an air guide chamber and a mixing chamber; the inlet end of the air flow detection chamber is an air inlet, and its outlet end is connected to the inlet end of the air guide chamber; a pressure drop perforated wall is provided in the air flow detection chamber, and a flow detection port 1 and a flow detection port 2 are provided on the front and rear sides of the pressure drop perforated wall respectively; the air guide chamber is a cylindrical cavity, the oxygen guide chamber is a circular cavity arranged on the outer periphery of the air guide chamber, and an oxygen inlet is provided on the outer wall of the oxygen guide chamber; the inlet ends of the oxygen mixing guide chamber and the air mixing guide chamber are connected to the oxygen guide chamber and the air guide chamber respectively, and the outlet ends of the two are connected to the mixing chamber; the outlet end of the mixing chamber is provided with a mixing perforated wall; the structure disclosed is a mixture of air and high-concentration oxygen, which cannot play a stabilizing effect on the change of oxygen solubility caused by the change of air flow. Summary of the invention

[0004] The technical problem to be solved by the present invention is that when a ventilator delivers an air-oxygen mixed gas, a change in the pipeline pressure leads to a change in the oxygen concentration.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] First, an oxygen concentration stabilizing valve is provided, comprising a valve body, wherein a cylinder is arranged in the valve body, both end surfaces of the cylinder are sealedly connected to the inner side surface of the valve body, an air outlet is arranged on the side surface of the valve body corresponding to one end surface of the cylinder, an oxygen inlet channel is penetrated through the other end of the cylinder, an air inlet is arranged on the side surface of the valve body, a blocking member for separating the oxygen inlet channel and the air outlet is installed in the cylinder, a gap of variable size exists between the blocking member and the inner end surface of the oxygen inlet channel, a first through hole is opened at a position of the side surface of the cylinder corresponding to the oxygen inlet channel, and a second through hole is opened at a position of the side surface of the cylinder corresponding to the air outlet.

[0007] Furthermore, the blocking member is a flexible sheet that can be deformed, and the flexible sheet is fixedly and sealedly connected to the inner wall of the cylinder on all sides; the flexible sheet is deformed, thereby changing the size of the gap.

[0008] Furthermore, the valve body comprises a front cover and a rear cover, the front cover has a U-shaped cross section, and the opening end face of the front cover is fixedly and sealedly connected to the rear cover; the valve body is divided into the front cover and the rear cover for easy installation and assembly.

[0009] Furthermore, the cylinder includes a first annular protrusion and a second annular protrusion, the first annular protrusion is installed inside the front cover, and the second annular protrusion is installed on the rear cover.

[0010] Furthermore, a first through hole is formed on the first annular protrusion, and a second through hole is formed on the second annular protrusion.

[0011] Furthermore, a flexible sheet is clamped between the end faces of the first annular protrusion and the second annular protrusion; by clamping the flexible sheet by the first annular protrusion and the second annular protrusion, the sealing of the butt joint surface can be ensured, and the stable installation of the flexible sheet can also be ensured.

[0012] Furthermore, a one-way valve is provided on the side of the outer end of the oxygen inlet channel; the one-way valve is used to discharge excess oxygen.

[0013] Furthermore, the blocking member is a piston, the cylinder body is equipped with a piston, and the piston is elastically connected to the oxygen inlet passage; the movement of the piston can also ensure the change of the size of the gap.

[0014] Furthermore, a baffle is installed in the oxygen inlet channel, a plurality of air holes are opened on the baffle, the baffle is connected to the piston via a connecting rod, a baffle ring is installed in the oxygen inlet channel, and the baffle and the baffle ring are connected via an elastic member.

[0015] The present invention also provides a respiratory support device, comprising the stabilizing valve as described above, wherein the air outlet is connected to a mixing chamber, the mixing chamber is connected to a turbine, the turbine is connected to the human respiratory system, and the outer end of the oxygen inlet channel is connected to a proportional valve; the stabilizing valve is used to ensure that the mixing ratio of the output air and oxygen is within a preset range to ensure the needs of use.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention changes the size of the gap by using a blocking member while the amount of air entering changes, thereby changing the amount of oxygen entering, ensuring that the ratio of air and oxygen when mixed is within a preset range, thus meeting the needs of users;

[0018] Second, by using the flexible sheet, when the pressure at the air outlet changes, the size of the gap can be changed automatically, so that the proportion of air and oxygen in the mixing process is within a preset range, ensuring the stable operation of the device;

[0019] 3. In the process of adjusting the solubility of air and oxygen, the present invention does not use other active components, so that its structure is simple, the cost is low, and it is easy to manufacture and install.

[0020] A respiratory support device of the present invention also has the above advantages. At the same time, during the automatic control of oxygen concentration of the respiratory support device, all of it is completed by the automatic deformation of the flexible diaphragm caused by the negative pressure at the front end of the turbine, without the intervention of intelligent control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 is a three-dimensional diagram of this embodiment;

[0023] Figure 2 is a cross-sectional view of the first embodiment;

[0024] Figure 3 for Figure 2 A magnified image of point A;

[0025] Figure 4 This is a usage state diagram of the first embodiment;

[0026] Figure 5 is a cross-sectional view of a second embodiment;

[0027] Figure 6 is a usage state diagram of the second embodiment;

[0028] Figure 7 This is a gas circuit diagram of a respiratory support device. DETAILED DESCRIPTION

[0029] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present invention, descriptions such as "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 the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] 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.

[0033] The present invention provides an oxygen concentration stabilizing valve, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a valve body 20, a cylinder 200 is arranged inside the valve body 20, both ends of the cylinder 200 are sealed and connected to the inner wall of the valve body, a side surface of the valve body 20 corresponding to one end of the cylinder 200 is provided with an outlet port 224 that penetrates the inside of the cylinder 200, a side surface of the valve body 20 corresponding to the other end of the cylinder 200 is provided with an oxygen inlet channel 211 that penetrates the inside of the cylinder 200, an air inlet port 213 is arranged on the side surface of the valve body 20, a blocking member that separates the oxygen inlet channel 211 and the air outlet port 224 is arranged on the inner end of the cylinder 200 corresponding to the oxygen inlet channel 211, a gap 25 exists between the blocking member and the inner end surface of the oxygen inlet channel 211, a first through hole 212 is arranged at a position of the cylinder 200 corresponding to the oxygen inlet channel 211, and a second through hole 223 is arranged at a position of the cylinder 200 corresponding to the air outlet port 224.

[0034] In this embodiment, oxygen enters the valve body 20 through the oxygen inlet channel 211. Due to the presence of the blocking member, the oxygen enters the cylinder 200 through the gap 25 at this time, and then the oxygen is discharged through the first through hole 212. The air enters the valve body 20 through the air inlet 213. At this time, the oxygen discharged from the first through hole 212 is mixed with the air entering from the air inlet 213, and returns to the cylinder 200 through the second through hole 223, and is discharged from the air outlet 224.

[0035] Since the oxygen delivery amount can remain unchanged, while the air intake amount may be inconsistent due to changes in air pressure, in order to ensure that the ratio of oxygen and air is within a certain range when they are discharged from the air outlet 224; when the air intake amount increases, the corresponding oxygen intake amount also needs to increase. At this time, the blocking member can be moved to increase the gap 25. When the oxygen delivery amount is constant, the increase in the gap allows more oxygen to enter the cylinder 200 through the gap. In the mixed gas discharged from the air outlet 224, the ratio of oxygen to air can be controlled within a preset range; correspondingly, when the air intake amount decreases, the blocking member is moved to reduce the gap 25. Therefore, the oxygen entering the cylinder 200 is reduced. Finally, the mixing ratio of oxygen and air in the mixed gas discharged from the air outlet 224 is still within the preset range, meeting the needs of use.

[0036] Since the oxygen delivery amount remains unchanged, the change of the gap will cause the oxygen discharged from the oxygen inlet channel 211 to change. In order to discharge the excess oxygen, a one-way valve 23 is provided on the outer side of the oxygen inlet channel 211. The excess oxygen is discharged through the one-way valve 23.

[0037] like Figure 2 and Figure 4 As shown, in this embodiment, the blocking member is a flexible sheet 24, which is made of silicone or other elastic materials. The flexible sheet 24 is fixedly sealed and connected to the inner wall of the cylinder 200 on all sides. When the gap needs to be changed, the flexible sheet 24 is deformed to deform in the direction away from the oxygen inlet channel 211, and the corresponding gap 25 becomes larger.

[0038] In actual use, the air pressure at the air outlet 224 can be lower than the air pressure in the oxygen inlet channel 211. At this time, under the action of the air pressure, the flexible sheet 24 is deformed in a direction away from the oxygen inlet channel 211 to increase the gap.

[0039] In the present embodiment, for the convenience of assembly, the valve body 20 includes a front cover 21 and a rear cover 22. The cross-section of the front cover 21 is U-shaped, and the rear cover 22 is installed on the open end face of the front cover 21. The connection between the rear cover 22 and the front cover 21 is fixedly sealed to ensure the sealing performance. The cylinder 200 includes a first annular protrusion 215 and a second annular protrusion 222. In the present embodiment, the first annular protrusion 215 is integrally formed with the front cover 21, and the second annular protrusion 222 is integrally formed with the rear cover 22. When the rear cover 22 is installed on the front cover 21, the end faces of the first annular protrusion 215 and the second annular protrusion 222 are close to each other to form the cylinder 200, wherein a flexible sheet 24 is clamped between the first annular protrusion 215 and the second annular protrusion 222.

[0040] Specifically, a first through hole 212 is formed on a side of the first annular protrusion 215 , a second through hole 223 is formed on a side of the second annular protrusion 222 , an air inlet 213 is formed on the front cover 21 , and an air outlet 224 is formed on the rear cover 22 .

[0041] The use process of this embodiment is as follows:

[0042] like Figure 2 As shown, oxygen enters through the oxygen inlet channel 211 (Figure a), enters the first annular protrusion 215 through the gap 25, and is then discharged through the first through hole 212 (Figure b), and air enters the front cover 21 through the air inlet 213 (Figure c), at which time the oxygen and air are preliminarily mixed in the front cover 21 and move in the front cover 21 toward the air outlet 224 (Figure d), and then enter the second annular protrusion 215 through the second through hole 223 (Figure e), and finally are discharged through the air outlet 224 (Figure f).

[0043] like Figure 4 As shown, since the air inlet 213 and the air outlet 224 are connected, the air pressure in 224 decreases, and more air will enter the front cover 21 through the air inlet 213. At this time, the air intake volume increases. At the same time, the flexible sheet 24 is deformed under the action of the air pressure and bulges toward the air outlet 224. At this time, the gap 25 becomes larger, and the amount of oxygen entering increases. The amount of air and oxygen entering both increases, so that the mixing ratio of oxygen and air can be maintained within a certain range.

[0044] In this embodiment, the excess oxygen is discharged through the one-way valve 23.

[0045] Second embodiment

[0046] like Figure 5 and Figure 6 As shown, in this embodiment, the blocking member is a piston 26, and a baffle 263 is installed in the oxygen inlet channel 211. The baffle 263 is provided with an air vent 264. The baffle 263 and the piston 26 are connected by a connecting rod 261. A baffle ring 262 is provided in the oxygen inlet channel 211, and the baffle ring 262 is located between the baffle 263 and the piston 26. The baffle ring 262 and the baffle 263 are connected by an elastic member, and the piston 26 is sealed with the inner side of the cylinder 200.

[0047] In this embodiment, the elastic member is a spring. Under the action of the elastic member, a gap 25 exists between the piston 26 and the oxygen inlet channel 211. The movement of the piston 26 changes the size of the gap 25, and the spring is stretched and compressed accordingly.

[0048] In this embodiment, the valve body 20 includes a front cover 21 and a rear cover 22, wherein one end face of the cylinder 200 is fixedly sealed with the inner side face of the front cover 21, and the other end face is fixedly sealed with the inner side face of the rear cover 22. An oxygen inlet channel 211 is penetrated on the end face of the front cover 21, an air inlet 213 is provided on the side face of the front cover 21, and an air outlet 224 is opened on the rear cover 22.

[0049] The use process of this embodiment is as follows:

[0050] like Figure 5 As shown, oxygen enters through the oxygen inlet channel 211 (Figure a) and passes through the air vent 264, then enters the cylinder 200 through the gap 25, and is then discharged through the first through hole 212 (Figure b), and the air enters the front cover 21 through the air inlet 213 (Figure c), at which time the oxygen and air are preliminarily mixed in the front cover 21 and move in the front cover 21 toward the air outlet 224 (Figure d), and then enter the cylinder 200 again through the second through hole 223 (Figure e), and finally are discharged through the air outlet 224 (Figure f).

[0051] like Figure 6 As shown, since the air inlet 213 and the air outlet 224 are connected, the air pressure in 224 decreases, and more air will enter the front cover 21 through the air inlet 213. At this time, the air intake volume increases. At the same time, the piston 26 moves toward the air outlet 224 under the action of the air pressure, and the spring is stretched. At this time, the gap 25 becomes larger, and the amount of oxygen entering increases. The increase in air and oxygen also increases at the same time, so that the mixing ratio of oxygen and air can be maintained within a certain range.

[0052] The present invention also provides a respiratory support device, such as Figure 7 As shown, it includes the stabilizing valve as described above, the air outlet 224 is connected to the mixing chamber 11, the mixing chamber is connected to the turbine 13, the turbine 13 is connected to the human respiratory system, and the outer end of the oxygen inlet channel 211 in the stabilizing valve is connected to the proportional valve 12.

[0053] In this embodiment, air and oxygen enter the mixing chamber 11 from the air outlet 224 to be fully mixed, and are then pressurized by the turbine 13 and delivered to the human respiratory system to support the use needs of the human respiratory system.

[0054] When the respiratory support device is in the inhalation mode (i.e. when the human body inhales), the speed of the turbine 13 becomes faster, and the negative pressure at the front end of the turbine 13 increases, that is, negative pressure is formed at the air inlet 224. At this time, the blocking member will be away from the oxygen inlet channel 211, so that the gap 25 is increased, so that the overflow of oxygen at the one-way valve 23 is reduced or there is no overflow. At the same time, the speed of the turbine 13 becomes faster, and the amount of air inhaled at the air inlet 213 increases. In this way, the inhalation amount of air and oxygen reaches the maximum, ensuring the oxygen concentration preset at the beginning, and realizing the stability of the oxygen concentration of the mixed gas when it enters the air outlet 224 from the hole 223 under high pressure.

[0055] When the respiratory support device is in the exhalation mode (i.e. when the human body exhales), the speed of the turbine 13 slows down, and the pressure at the front end of the turbine 13 recovers, that is, the pressure at the air inlet 224 increases, and the blocking member moves toward the oxygen inlet channel 211, the gap 25 becomes smaller, and the overflow of the one-way valve 23 increases. At the same time, the speed of the turbine 13 slows down, and the amount of air inhaled at the air inlet 213 decreases. In this way, the amount of air and oxygen inhaled is minimized, ensuring the oxygen concentration preset at the beginning.

[0056] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. An oxygen concentration stabilizing valve, characterized in that: The invention comprises a valve body (20), wherein a cylinder (200) is arranged inside the valve body (20), both end surfaces of the cylinder (200) are sealedly connected to the inner side surface of the valve body (20), an air outlet (224) is arranged on the side surface of the valve body (20) corresponding to one end surface of the cylinder (200), an oxygen inlet channel (211) is penetrated through the other end of the cylinder (200), an air inlet (213) is arranged on the side surface of the valve body (20), a blocking member for separating the oxygen inlet channel (211) and the air outlet (224) is installed inside the cylinder (200), a gap (25) of variable size exists between the blocking member and the inner end surface of the oxygen inlet channel (211), a first through hole (212) is opened at a position of the side surface of the cylinder (200) corresponding to the oxygen inlet channel (211), and a second through hole (223) is opened at a position of the side surface of the cylinder (200) corresponding to the air outlet (224).

2. An oxygen concentration stabilizing valve according to claim 1, characterized in that: The blocking member is a deformable flexible sheet (24), and the flexible sheet (24) is fixedly and sealedly connected to the inner wall of the cylinder (200) on all sides.

3. An oxygen concentration stabilizing valve according to claim 2, characterized in that: The valve body (20) comprises a front cover (21) and a rear cover (22); the front cover (21) has a U-shaped cross section, and the opening end surface of the front cover (21) is fixedly sealed and connected to the rear cover (22).

4. An oxygen concentration stabilizing valve according to claim 3, characterized in that: The barrel (200) comprises a first annular protrusion (215) and a second annular protrusion (222); the first annular protrusion (215) is installed inside the front cover (21), and the second annular protrusion (222) is installed on the rear cover (22).

5. An oxygen concentration stabilizing valve according to claim 4, characterized in that: The first annular protrusion (215) is provided with a first through hole (212), and the second annular protrusion (222) is provided with a second through hole (223).

6. An oxygen concentration stabilizing valve according to claim 4, characterized in that: A flexible sheet (24) is clamped between the end surfaces of the first annular protrusion (215) and the second annular protrusion (222).

7. The oxygen concentration stabilizing valve according to claim 1, characterized in that: A one-way valve (23) is provided on the side of the outer end of the oxygen inlet channel (211).

8. The oxygen concentration stabilizing valve according to claim 1, characterized in that: The blocking member is a piston (26), and the cylinder (200) is fitted with the piston (26), and the piston (26) is elastically connected to the oxygen inlet channel (211).

9. An oxygen concentration stabilizing valve according to claim 8, characterized in that: A baffle (263) is installed in the oxygen inlet passage (211), and a plurality of air holes (264) are provided on the baffle (263). The baffle (263) and the piston (26) are connected via a connecting rod (261). A baffle ring (262) is installed in the oxygen inlet passage (211), and the baffle (263) and the baffle ring (262) are connected via an elastic member.

10. A respiratory support device, characterized in that: It comprises a stabilizing valve as described in any one of claims 1 to 9, wherein the air outlet (224) is connected to a mixing chamber (11), the mixing chamber is connected to a turbine (13), the turbine (13) is connected to the human respiratory system, and the outer end of the oxygen inlet channel (211) is connected to a proportional valve (12).

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