A negative pressure flow-increasing and flow-reversing structure

Abstract

The present invention provides a negative pressure boosting and flow reversing structure, comprising: a cavity and a rotating baffle; a first interface for connecting the positive pressure end of the gas source and a second interface for connecting the patient end are provided on one side of the cavity, and a third interface for connecting the atmosphere end and a fourth interface for connecting the negative pressure end of the gas source are provided on the other side; a first partition plate is arranged between the first interface and the third interface inside the cavity, and the first partition plate is connected with a first arc plate; a second partition plate is arranged between the first interface and the second interface, and the second partition plate is connected with a second arc plate; a third partition plate is arranged between the third interface and the fourth interface, and the third partition plate is connected with a third arc plate; a fourth arc plate is arranged between the second interface and the fourth interface; the first arc plate, the second arc plate, the third arc plate and the fourth arc plate form a circular rotating groove provided with four channel openings; and the rotating baffle is arranged inside the circular rotating groove.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a negative pressure flow increasing and commutation structure. Background Art

[0002] For medical surgeries with positive and negative pressure ventilation, there are usually the following two ways to achieve positive and negative pressure ventilation: The first is to use two gas sources, one gas source is responsible for positive pressure ventilation, and the other gas source is responsible for negative pressure ventilation; the second way is to use only one gas source and an additional commutation structure to switch the positive and negative pressures of the gas source through the commutation structure. The peak flow rate during negative pressure ventilation is particularly important for sputum drainage effect. In the existing positive and negative pressure switching structures, when switching to the negative pressure working mode, the tortuous flow path of the air flow will cause serious air flow loss. Summary of the Invention

[0003] The present invention is made to solve the problem of serious air flow loss in the positive and negative pressure switching structure during negative pressure ventilation, and aims to provide a negative pressure flow increasing and commutation structure.

[0004] The present invention provides a negative pressure flow increasing and commutation structure, which is characterized by comprising: a cavity and a rotating baffle; on one side of the cavity, there is a first interface for connecting the positive pressure end of the gas source and a second interface for connecting the patient end, and on the other side, there is a third interface for connecting the atmosphere end and a fourth interface for connecting the negative pressure end of the gas source; the positive pressure end and the negative pressure end of the gas source are the positive pressure end and the negative pressure end of the same gas source device; the first interface and the third interface are symmetric left and right, and the second interface and the fourth interface are symmetric left and right; inside the cavity, a first partition is arranged between the first interface and the third interface, and the first partition is connected with a first arc plate; a second partition is arranged between the first interface and the second interface, and the second partition is connected with a second arc plate; a third partition is arranged between the third interface and the fourth interface, and the third partition is connected with a third arc plate; the second partition and the third partition are symmetric left and right, and the second arc plate and the third arc plate are symmetric left and right; a fourth arc plate is arranged between the second interface and the fourth interface; the first arc plate, the second arc plate, the third arc plate, and the fourth arc plate form a circular rotating groove provided with four channel openings; the rotating baffle is arranged in the circular rotating groove.

[0005] Further, in the negative pressure flow increasing and commutation structure provided by the present invention, there may also be such a feature: wherein, the first partition is arranged at the symmetry axis position between the first interface and the third interface; the second partition and the third partition are arranged at the straight line where the diameter of the circular rotating groove is located; the widths of the second partition and the third partition are equal, and the width of the first partition is greater than the width of the second partition.

[0006] Further, in the negative pressure flow increasing and flow direction changing structure provided by the present invention, the following features can also be set: Among them, the arc lengths of the second arc plate and the third arc plate are equal, and the central angle corresponding to this arc length is 10° - 20°; the central angle corresponding to the arc length of the first arc plate is 10° - 20°; the central angle corresponding to the arc length of the fourth arc plate is 30° - 40°.

[0007] Further, in the negative pressure flow increasing and flow direction changing structure provided by the present invention, the following features can also be set: Among them, both end surfaces of the rotating baffle are arc surfaces; the arc length of the arc surface is less than the arc length of the second arc plate and less than the arc length of the first arc plate.

[0008] Further, in the negative pressure flow increasing and flow direction changing structure provided by the present invention, the following features can also be set: Among them, when both end surfaces of the rotating baffle rotate to contact the first arc plate and the fourth arc plate respectively, the patient end is communicated with the positive pressure end of the air source, and the atmosphere end is communicated with the negative pressure end of the air source.

[0009] Further, in the negative pressure flow increasing and flow direction changing structure provided by the present invention, the following features can also be set: Among them, when both end surfaces of the rotating baffle rotate to contact the second arc plate and the third arc plate respectively, the patient end is communicated with the negative pressure end of the air source, and the positive pressure end of the air source is communicated with the atmosphere end.

[0010] Functions and effects of the present invention:

[0011] The negative pressure flow increasing and flow direction changing structure of the present invention realizes that in the positive pressure working mode, the ventilation air flow between the patient end and the positive pressure end of the air source has a large turning flow direction, with an air flow buffering effect; in the negative pressure working mode, the ventilation air flow between the patient end and the negative pressure end of the air source is directly conducted in a straight flow direction, reducing the loss of negative pressure air flow and increasing the peak flow rate. Description of the drawings

[0012] Figure 1 is the split structure diagram (sectional view) of the negative pressure flow increasing and flow direction changing structure in the embodiment of the present invention;

[0013] Figure 2 is the schematic diagram of the air flow direction in the negative pressure working mode of the negative pressure flow increasing and flow direction changing structure in the embodiment of the present invention;

[0014] Figure 3 is the schematic diagram of the air flow direction in the positive pressure working mode of the negative pressure flow increasing and flow direction changing structure in the embodiment of the present invention. Specific embodiments

[0015] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the following embodiments will specifically describe the technical solutions of the present invention in conjunction with the drawings.

[0016] Such as Figure 1As shown in the figure, this embodiment provides a negative pressure flow - increasing and flow - reversing structure, which includes a cavity 1 and a rotating baffle 2. Only the cross - sectional structures of the cavity 1 and the rotating baffle 2 are schematically shown in the drawings of this embodiment. There is no limitation on the outer appearance of the housing of the cavity 1, and the outer appearance of the housing of the cavity 1 can be set to any suitable shape by using conventional technical means according to actual needs; in addition, there is no limitation on the gripping part of the rotating baffle 2 for human operation, and any suitable shape can be adopted by using conventional technical means according to actual needs.

[0017] The cavity 1 is preferably set as a left - right symmetric structure. On one side, there is a first interface 11 for connecting the positive - pressure end of the air source and a second interface 12 for connecting the patient end. On the other side, there is a third interface 13 for connecting the atmosphere end and a fourth interface 14 for connecting the negative - pressure end of the air source. The first interface 11 and the third interface 13 are left - right symmetric, and the second interface 12 and the fourth interface 14 are left - right symmetric. In this embodiment, the cross - sectional shape of the cavity 1 is square, but this is not a limitation, and it can also be set to other suitable shapes according to actual needs.

[0018] Inside the cavity 1, a first partition plate 151 is arranged between the first interface 11 and the third interface 13, and the first partition plate 151 is connected with a first arc plate 152. A second partition plate 161 is arranged between the first interface 11 and the second interface 12, and the second partition plate 161 is connected with a second arc plate 162. A third partition plate 171 is arranged between the third interface 13 and the fourth interface 14, and the third partition plate 151 is connected with a third arc plate 172. The second partition plate 161 and the third partition plate 171 are left - right symmetric, and the second arc plate 162 and the third arc plate 172 are left - right symmetric. A fourth arc plate 18 is arranged between the second interface 12 and the fourth interface 14. The first arc plate 152, the second arc plate 162, the third arc plate 172, and the fourth arc plate 18 form a circular rotating groove 10 with four channel openings. The rotating baffle 2 is arranged in the circular rotating groove 10.

[0019] The first partition plate 151 is arranged at the axis of symmetry position between the first interface 11 and the third interface 13. The second partition plate 161 and the third partition plate are arranged at the straight - line position of the diameter of the circular rotating groove. The widths of the second partition plate 161 and the third partition plate 171 are equal, and the width of the first partition plate 151 is greater than the width of the second partition plate 161. Figure 1 The width k of the second partition plate 161 and the width m of the first partition plate 151 are marked in the figure. For example, the width m can be set to 2 times the width k.

[0020] The arc lengths of the second arc plate 162 and the third arc plate 172 are equal, and the central angle corresponding to the arc length is 10° to 20°. The central angle corresponding to the arc length of the first arc plate 152 is 10° to 20°, and the first arc plate 152 can be set to be the same size as the second arc plate 162, or it can be set to be different. The central angle corresponding to the arc length of the fourth arc plate 18 is 30° to 40°, and the arc length of the fourth arc plate 18 is greater than the length of the remaining first arc plate 152, the second arc plate 162, and the third arc plate 172. The two end surfaces 21 of the rotating baffle 2 are both arc surfaces, and the arc length of the arc surface is less than the arc length of the second arc plate 162, and less than the arc length of the first arc plate 152.

[0021] The negative pressure flow increasing reversing structure of this embodiment uses only one gas source when working, that is, the positive pressure end and the negative pressure end of the gas source are the positive pressure end and the negative pressure end of the same gas source device, and the type of the gas source is not limited. The negative pressure flow increasing reversing structure can be applied to oxygen supply sources and various types of anesthetic gas sources. The negative pressure flow increasing reversing structure of this embodiment is connected to the gas source device through a conduit or other channels.

[0022] The negative pressure flow-increasing reversing structure of this embodiment has the following two working modes:

[0023] Negative pressure working mode: Figure 2 As shown, when the two end surfaces of the rotating baffle 2 rotate to contact the first arc plate 152 and the fourth arc plate 18 respectively, the patient end is connected to the positive pressure end of the gas source, and the atmosphere end is connected to the negative pressure end of the gas source. Figure 2 As shown by the middle airflow arrow, the ventilation airflow at the patient end and the negative pressure end of the air source are directly connected in a straight line flow direction.

[0024] Positive pressure working mode: Figure 3 As shown, when the two end surfaces of the rotating baffle 2 rotate to contact the second arc plate 162 and the third arc plate 172 respectively, the patient end is connected to the negative pressure end of the gas source, and the positive pressure end of the gas source is connected to the atmosphere end. Figure 2 As shown by the middle airflow arrow, the ventilation airflow at the patient end and the positive pressure end of the air source presents a large bend flow direction, which has an airflow buffering effect.

[0025] The above embodiments are only preferred implementation modes of the present invention and are not used to limit the protection scope of the present invention. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A negative pressure flow - increasing and flow - reversing structure, characterized in that, it includes: a cavity and a rotating baffle; On one side of the cavity, there is a first interface for connecting the positive - pressure end of the gas source and a second interface for connecting the patient end. On the other side, there is a third interface for connecting the atmosphere end and a fourth interface for connecting the negative - pressure end of the gas source; The positive - pressure end of the gas source and the negative - pressure end of the gas source are the positive - pressure end and the negative - pressure end of the same gas - source device; The first interface and the third interface are symmetric left - and - right, and the second interface and the fourth interface are symmetric left - and - right; Inside the cavity, a first partition board is arranged between the first interface and the third interface, and the first partition board is connected with a first arc plate; A second partition board is arranged between the first interface and the second interface, and the second partition board is connected with a second arc plate; A third partition board is arranged between the third interface and the fourth interface, and the third partition board is connected with a third arc plate; The second partition board and the third partition board are symmetric left - and - right, and the second arc plate and the third arc plate are symmetric left - and - right; A fourth arc plate is arranged between the second interface and the fourth interface; The first arc plate, the second arc plate, the third arc plate, and the fourth arc plate form a circular rotating groove provided with four channel openings; The rotating baffle is arranged inside the circular rotating groove; The first partition board is arranged at the symmetry - axis position between the first interface and the third interface; The second partition board and the third partition board are arranged at the straight - line position of the diameter of the circular rotating groove; The widths of the second partition board and the third partition board are equal, and the width of the first partition board is greater than the width of the second partition board; The arc lengths of the second arc plate and the third arc plate are equal, and the central angle corresponding to this arc length is 10° - 20°; The central angle corresponding to the arc length of the first arc plate is 10° - 20°; The central angle corresponding to the arc length of the fourth arc plate is 30° - 40°.

2. The negative pressure flow - increasing and flow - reversing structure according to claim 1, characterized in that: wherein, Both end surfaces of the rotating baffle are arc surfaces; The arc length of the arc surface is less than the arc length of the second arc plate and less than the arc length of the first arc plate.

3. The negative pressure flow - increasing and flow - reversing structure according to claim 1, characterized in that: wherein, When both end surfaces of the rotating baffle rotate to contact the first arc plate and the fourth arc plate respectively, the patient end is in communication with the positive - pressure end of the gas source, and the atmosphere end is in communication with the negative - pressure end of the gas source.

4. The negative pressure flow - increasing and flow - reversing structure according to claim 1, characterized in that: wherein, When both end surfaces of the rotating baffle rotate to contact the second arc plate and the third arc plate respectively, the patient end is in communication with the negative - pressure end of the gas source, and the positive - pressure end of the gas source is in communication with the atmosphere end.

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