An attached local oxygen supply system

Abstract

The present invention belongs to the technical field of oxygen supply equipment and relates to an attached type local oxygen supply system, which comprises an oxygen generator, a first static pressure box, an oxygen supply pipe and a terminal oxygen supply device connected in sequence; an air inlet and an oxygen inlet are arranged on the first static pressure box, and the oxygen inlet is connected to an outdoor oxygen generator; the terminal oxygen supply device comprises a box body, an air inlet is arranged at the top of the box body, the air inlet is connected to the first static pressure box through the oxygen supply pipe, a flow equalizing orifice plate is arranged in the upper part of the box body, a second static pressure box is arranged in the lower part, a slot air outlet is arranged at the bottom of the box body, and a deflector with an adjustable angle is connected to the position corresponding to the slot air outlet. The attached oxygen supply directly sends the oxygen-rich air flow along the wall surface and the deflector to the personnel breathing area, so that the local oxygen enrichment rate in the breathing area is rapidly increased, the excess oxygen amount diffuses along the ground to form an air lake, and gradually diffuses upward to increase the global oxygen enrichment rate; the deflector directly conveys the oxygen-rich air flow to the personnel breathing area, so that the oxygen enrichment rate in the whole space ranges from the target area to the whole, reducing the total oxygen supply amount.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen supply equipment, and particularly relates to an attached local oxygen supply system. Background Art

[0002] To alleviate the hypoxia of plateau populations caused by low oxygen content in the air at high altitudes and the low oxygen saturation of patients caused by lung diseases, oxygen generators are generally used to supply oxygen. Since the oxygen flow provided by the oxygen generator is small, the delivery of pure oxygen can only rely on low-momentum diffusion or nasal inhalation oxygen supply methods.

[0003] However, in traditional diffusion oxygen supply, there are often phenomena such as uneven spatial distribution of oxygen concentration and slow oxygen enrichment rate, which often cause oxygen waste and increase the oxygen consumption cost; the nasal inhalation hose restricts head movement, and long-term use will cause discomfort to the nasal mucosa. Summary of the Invention

[0004] The purpose of the present invention is an attached local oxygen supply system, which solves the problems of uneven spatial distribution of oxygen concentration and slow oxygen enrichment rate in diffusion oxygen supply.

[0005] The present invention is realized through the following technical solutions:

[0006] An attached local oxygen supply system,

[0007] An attached local oxygen supply system includes an oxygen generator, a first static pressure box, an oxygen supply pipe, and an end oxygen supply device connected in sequence;

[0008] The first static pressure box is provided with an air inlet and an oxygen inlet. The oxygen inlet is connected to an outdoor oxygen generator, and the air inlet is used to introduce indoor air into the first static pressure box;

[0009] The end oxygen supply device includes a box body. An air inlet is provided at the top of the box body. The air inlet is connected to the first static pressure box through an oxygen supply pipe. A flow equalizing orifice plate is provided in the upper part of the box body, a second static pressure box is provided in the lower part, a slotted air outlet is provided at the bottom of the box body, and a deflector with an adjustable angle is connected below the corresponding slotted air outlet.

[0010] Furthermore, the end oxygen supply device is arranged on the wall above the human breathing area, and the center line of the end oxygen supply device is located at the center of the breathing area.

[0011] Furthermore, the flow equalizing orifice plates are arranged on both sides of the box body and are symmetrically arranged;

[0012] The flow equalizing orifice plate is an L-shaped plate, and a plurality of air holes are opened on both side walls of the L-shaped plate.

[0013] Furthermore, the length l of the slotted air outlet is L / 2, and the width w is W / 2, where L is the length of the box body and W is the width of the box body.

[0014] Furthermore, the flow guide plate is a bent plate, which is composed of a vertical plate body and a horizontal plate body. The height of the vertical plate body is h, the width of the horizontal plate body is b, and the included angle between the vertical plate body and the horizontal plate body is θ, and θ is adjusted according to the usage scenario.

[0015] Furthermore, the number of the end oxygen supply devices is set according to requirements, and the height l2 of the slot air outlet from the ground is adjusted according to individual needs.

[0016] Furthermore, the first static pressure box includes a fan and a mixing box body which are connected. The oxygen inlet and the air inlet are arranged on the mixing box body, and the fan is communicated with the air inlet of the end oxygen supply device.

[0017] Furthermore, the velocity u0 of the oxygen-rich air flow coming out of the slot air outlet and the axial velocity u of the oxygen-rich air flow in the breathing zone m satisfy the relationship:

[0018] where K h is the height correction factor

[0019] u m represents the axial velocity of the oxygen-rich air flow at a certain point in the breathing zone, and the horizontal distance from this point to the wall where the end oxygen supply device is installed is x;

[0020] The oxygen concentration c0 of the oxygen-rich air flow coming out of the slot air outlet and the axial concentration c of the oxygen-rich air flow in the breathing zone m satisfy the relationship:

[0021] where c n is the initial ambient oxygen concentration, Fr is the density Froude number, ρ0 is the density of the oxygen-rich air flow at the slot air outlet, ρ a is the ambient density, g is the acceleration due to gravity, and l' is the characteristic length of the slot air outlet;

[0022] l is the length of the slot air outlet, and w is the width of the slot air outlet.

[0023] Furthermore, the total volume flow rate Q of the attached type local oxygen supply system is Q = l × s × u0;

[0024] l is the length of the slot air outlet, s is the oxygen volume concentration of the oxygen generator, and u0 is the velocity of the oxygen-rich air flow coming out of the slot air outlet.

[0025] Furthermore, the oxygen volume concentration of the oxygen-rich air flow at the slot air outlet is ω', satisfying:

[0026] where, Q y is the volume flow rate of the high-purity oxygen gas provided by the oxygen generator, Q fis the inlet air volume flow rate of the first static pressure box, and the ambient oxygen volume concentration is ω0.

[0027] Compared with the prior art, the present invention has the following beneficial technical effects:

[0028] The present invention discloses an attached local oxygen supply system, which includes an oxygen generator, a first static pressure box, an oxygen supply pipe, and a terminal oxygen supply device connected in sequence; a flow equalizing orifice plate is provided in the upper part of the box body of the terminal oxygen supply device, a second static pressure box is provided in the lower part, a slit air outlet is provided at the bottom of the box body, and a deflector with an adjustable angle is connected below the corresponding slit air outlet. In the first static pressure box, the air supply and oxygen supply are mixed in a certain proportion to increase the flow rate of the oxygen-rich air. The terminal oxygen supply device uses attached jet flow to send the oxygen-rich air flow into the personnel breathing area at a lower speed. Compared with the diffused or nasal inhalation oxygen supply methods, the attached oxygen supply directly sends the oxygen-rich air flow along the wall surface and the deflector to the personnel breathing area, so that the local oxygen enrichment rate in the breathing area is rapidly increased, and the excess oxygen amount diffuses along the ground to form an air lake, which gradually diffuses upward to increase the global oxygen enrichment rate; the position of the terminal oxygen supply device can be adjusted according to the environment, and it can achieve directional and personalized oxygen supply on the premise of ensuring comfort. The adjustable deflector in the terminal oxygen supply device of the present invention directly transports the oxygen-rich air flow to the personnel breathing area, so that the oxygen enrichment rate in the entire space gradually increases from the target area to the global and from bottom to top. Under the same oxygen supply flow rate, the present invention can make the oxygen concentration in the personnel activity area reach the specification requirements faster and reduce the total oxygen supply amount to a certain extent.

[0029] Furthermore, the flow rate of the oxygen-rich gas reaching the breathing area in the present invention is less than that of the traditional nasal inhalation oxygen supply products, and the oxygen supply area is larger than that of the traditional nasal inhalation oxygen supply products. Through the proposed calculation formulas for the axial velocity and oxygen concentration of the oxygen-rich air flow, the installation parameters of the terminal oxygen supply device can be designed personalized according to the use scenario and requirements, so as to ensure that the oxygen-rich air flow reaches the designated breathing area and ensure the comfort of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the oxygen supply system of a single oxygen supply device in the present invention;

[0031] Figure 2 is a schematic diagram of the structure of the terminal oxygen supply device in the present invention;

[0032] Figure 3 is a schematic diagram of the structure of the first static pressure box in the present invention;

[0033] Figure 4 is a schematic diagram of the oxygen supply system for sleeping with multiple oxygen supply devices in the present invention; (a) is a top view, and (b) is a front view;

[0034] Figure 5The pipe network diagram of the oxygen supply system for multiple oxygen supply devices in the present invention;

[0035] Figure 6 The contour maps of oxygen concentration and flow velocity during the operation of the oxygen supply system in the present invention; (a) is the contour map of oxygen concentration, and (b) is the contour map of flow velocity;

[0036] Wherein, 1 is an oxygen generator; 2 is the first static pressure box; 2-1 is a fan; 2-2 is an air inlet; 2-3 is an oxygen inlet; 3 is an oxygen supply pipe; 4 is an end oxygen supply device; 4-1 is an air inlet; 4-2 is the second static pressure box; 4-3 is a flow equalizing orifice plate; 4-4 is a slot air outlet; 4-5 is a deflector. Specific embodiments

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further detailed description is provided in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments.

[0038] The components described and shown in the drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the claimed present invention, but only represents a selected embodiment of the present invention. Based on the drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0039] It should be noted that the terms "comprising", "including" or any other variants are intended to cover non-exclusive inclusion, so that a process, element, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to the process, element, method, article or device. In addition, the terms "horizontal" and "vertical" are based on the orientation and positional relationship of the devices or components shown in the drawings, and are only for better describing the present invention, rather than requiring the shown devices, components or devices to have this specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0040] The features and performance of the present invention are further described in detail below in conjunction with embodiments.

[0041] As Figure 1 shown, the present invention discloses an attached type local oxygen supply system, which includes an oxygen generator 1, a first static pressure box 2 and an end oxygen supply device 4 connected in sequence.

[0042] As Figure 3As shown in the figure, the fan 2-1 is integrated in the first static pressure box 2. The first static pressure box 2 is provided with an air inlet 2-2 and an oxygen inlet 2-3. The oxygen inlet 2-3 is connected to an outdoor oxygen generator 1 through a hose. Indoor air enters the first static pressure box 2 through the air inlet 2-2 and is mixed with high-purity oxygen from the oxygen generator 1, and then is transported by the fan 2-1 to the terminal oxygen supply device 4 through the oxygen supply pipe 3.

[0043] As Figure 2 shown, the terminal oxygen supply device 4 includes a box body. An air inlet 4-1 is provided at the top of the box body. The air inlet 4-1 is connected to the fan 2-1 through the oxygen supply pipe 3. A flow equalizing orifice plate 4-3 is provided in the upper part of the box body, a second static pressure box 4-2 is provided in the lower part, a slotted air outlet 4-4 is provided at the bottom of the box body, and a deflecting plate 4-5 with adjustable angle is connected below the corresponding position of the slotted air outlet 4-4.

[0044] After the oxygen-rich air flow enters the flow equalizing orifice plate 4-3, it is mixed more evenly and then enters the lower second static pressure box 4-2. The oxygen-rich air flow is targeted to be transported to the personnel breathing area through the slotted air outlet 4-4 and the deflecting plate 4-5.

[0045] The deflecting plate 4-5 is a bent plate, which is composed of a vertical plate body and a horizontal plate body. The height of the vertical plate body is h, the width of the horizontal plate body is b, and the included angle between the vertical plate body and the horizontal plate body is θ. The angle θ can be adjusted according to individual needs.

[0046] According to the oxygen supply demand, the terminal oxygen supply device 4 can be selected to be used individually or in combination, such as Figure 1 、 Figure 4 shown.

[0047] As Figure 4-5 shown, according to the position of the rest bed and in combination with the height of the personnel's head and pillow, 4 terminal oxygen supply devices 4 are set.

[0048] The present invention considers ensuring the oxygen supply in the personnel breathing area, and designs a new type of local oxygen supply system and oxygen supply device through scientific design and calculation, in combination with the Coanda effect. The purpose is to reduce the blowing feeling generated by the oxygen supply device, and at the same time, to improve the oxygen enrichment rate and efficiency as much as possible, and create a new type of oxygen supply method that is directional and personalized for the personnel activity space and the oxygen demand of different individuals, which has practical significance.

[0049] The key of the present invention is to determine the geometric parameters and installation positions of the slotted air outlet 4-4 and the deflecting plate 4-5 of the attached oxygen supply device.

[0050] The flow velocity u0 of the oxygen-rich air flow coming out of the slotted air outlet 4-4 and the axial velocity u of the oxygen-rich air flow in the breathing area m satisfy the relationship:

[0051] where K h is the height correction factor

[0052] u m represents the axial velocity of the oxygen-rich air flow at a certain point in the breathing area, and the horizontal distance of this point from the installation wall of the end oxygen supply device 4 is x;

[0053] The oxygen concentration c0 of the oxygen-rich air flow from the slot air outlet 4-4 and the axial concentration c of the oxygen-rich air flow in the breathing area m satisfy the relational expression:

[0054] where c n is the initial ambient oxygen concentration, Fr is the density Froude number, ρ0 is the density of the oxygen-rich air flow from the slot air outlet 4-4, ρ a is the ambient density, g is the acceleration due to gravity, and l' is the characteristic length of the slot air outlet 4-4;

[0055] l is the length of the slot air outlet 4-4, and w is the width of the slot air outlet 4-4.

[0056] The total volume flow rate Q of the attached local oxygen supply system is Q = l×s×u0, where l is the length of the slot air outlet 4-4, s is the oxygen volume concentration of the oxygen generator 1, and u0 is the flow velocity of the oxygen-rich air flow from the slot air outlet 4-4.

[0057] Q y is the volume flow rate of the high-purity oxygen gas provided by the oxygen generator 1, and Q f is the inlet air volume flow rate of the air inlet 2-2 of the first static pressure box 2;

[0058] The oxygen volume concentration of the oxygen-rich air flow from the slot air outlet 4-4 is ω', and it satisfies:

[0059] where, Q y is the volume flow rate of the high-purity oxygen gas provided by the oxygen generator 1, and Q f is the inlet air volume flow rate of the air inlet 2-2 of the first static pressure box 2, and the ambient oxygen volume concentration is ω0.

[0060] Combined with Figure 4 (a) and Figure 4 (b), taking the oxygen supply in the small-space sleep state as an example, a detailed description is given.

[0061] According to the bed height, pillow height and the head size of adults, the height of the breathing area during sleep is determined to be 25 cm. The slot air outlet 4-4 of the attached oxygen supply device is installed 35 cm above the breathing area, with a width w = 0.5 cm and a length l = 10 cm; the height h of the deflector 4-5 is 5 cm, the length b is 4 cm, and the angle θ is 90°; the oxygen content ω' of the rich oxygen flow from the slot air outlet 4-4 of the terminal oxygen supply device 4 is 47%, the oxygen concentration of the oxygen generator 1 is ω = 86%, and the ambient oxygen concentration is ω0 = 19%; the flow velocity u0 of the rich oxygen flow from the slot air outlet 4-4 of the terminal oxygen supply device 4 is 0.5 m / s.

[0062] The contour maps of oxygen concentration and flow velocity distribution during the operation of the oxygen supply system are as Figure 6 shown. It can be seen from the oxygen concentration contour map in 6(a) that the oxygen concentration around the nose of the person reaches about 23%; it can be seen from the flow velocity contour map in 6(b) that the wind speed of the rich oxygen flow around the face of the person is less than 0.1 m / s, and there will be no feeling of being blown. The rich oxygen flow can be effectively transported to the breathing area of the person through the slot air outlet 4-4 and the deflector 4-5.

[0063] A kind of attached local oxygen supply system and oxygen supply device disclosed by the present invention mix high-purity oxygen and indoor air in a certain proportion in the static pressure box to increase the momentum of the rich oxygen flow, and reasonably design the geometric parameters and installation positions of the oxygen supply system and the slot air outlet 4-4 and the deflector 4-5 of the attached oxygen supply device, so as to realize directly sending the rich oxygen flow to the breathing area of the person, rapidly increasing the local oxygen enrichment rate in the breathing area and gradually increasing the global oxygen enrichment rate. Moreover, the flow velocity of the oxygen-rich gas in the breathing area is less than 0.1 m / s, and the oxygen supply area is larger than that of traditional local oxygen supply products, which can ensure that the rich oxygen flow is sent to the designated breathing area while ensuring the comfort of the person. The present invention can enable the oxygen concentration in the activity area of the person to reach the specification requirements faster and reduce the total oxygen supply amount to a certain extent.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. An attached local oxygen supply system, characterized in that, It includes an oxygen generator (1), a first static pressure box (2), an oxygen supply pipe (3), and an end oxygen supply device (4) connected in sequence; The first static pressure box (2) is provided with an air inlet (2-2) and an oxygen inlet (2-3). The oxygen inlet (2-3) is connected to the oxygen generator (1), and the air inlet (2-2) is used to introduce indoor air into the first static pressure box (2); The end oxygen supply device (4) includes a box body. An air inlet (4-1) is provided at the top of the box body. The air inlet (4-1) is connected to the first static pressure box (2) through the oxygen supply pipe (3). A flow equalizing orifice plate (4-3) is provided in the upper part of the box body, and a second static pressure box (4-2) is provided in the lower part. A slot air outlet (4-4) is provided at the bottom of the box body, and a deflector (4-5) with an adjustable angle is connected below the corresponding position of the slot air outlet (4-4); The flow equalizing orifice plates (4-3) are arranged on both sides of the box body and are symmetrically arranged; The flow equalizing orifice plate (4-3) is an L-shaped plate, and a plurality of air holes are opened on both side walls of the L-shaped plate; The deflector (4-5) is a bent plate, which is composed of a vertical plate body and a horizontal plate body. The height of the vertical plate body is h, the width of the horizontal plate body is b, and the included angle between the vertical plate body and the horizontal plate body is adjusted according to the use scenario; The first static pressure box (2) includes a fan (2-1) and a mixing box body connected to each other. The oxygen inlet (2-3) and the air inlet (2-2) are arranged on the mixing box body, and the fan (2-1) is communicated with the air inlet (4-1) of the end oxygen supply device (4); The flow velocity of the oxygen-rich air flow coming out of the slot air outlet (4-4) and the axial velocity of the oxygen-rich air flow in the breathing zone satisfy the relationship: ; wherein is the height correction factor, ; represents the axial velocity of the oxygen-rich air flow at a certain point in the breathing area, and the horizontal distance from this point to the wall where the end oxygen supply device (4) is installed is x; w is the width of the slot air outlet (4-4); h is the height of the flow guide plate (4-5).

2. The attached local oxygen supply system according to claim 1, characterized in that The end oxygen supply device (4) is arranged on the wall above the personnel breathing area, and the center line of the end oxygen supply device (4) is located at the center of the breathing area.

3. The attached local oxygen supply system according to claim 1, wherein, The length l of the slot air outlet (4-4) is L / 2, and the width w is W / 2, where L is the length of the box body and W is the width of the box body.

4. The attachable local oxygen supply system according to claim 1, wherein, The number of end oxygen supply devices (4) is set according to requirements, and the height l2 of the slot air outlet (4-4) from the ground is adjusted according to individual needs.

5. The attached local oxygen supply system according to claim 1, characterized in that, The oxygen concentration of the oxygen-rich air flow coming out of the slot air outlet (4-4) and the axis concentration of the oxygen-rich air flow in the breathing zone satisfy the relationship: ; Among them, c n is the initial environmental oxygen concentration, is the density Froude number, , is the density of the oxygen-rich air flow at the slot air outlet (4-4), is the environmental density, is the acceleration of gravity, is the characteristic length of the slot air outlet (4-4); ; l is the length of the slot air outlet (4-4).

6. The attachable local oxygen supply system according to claim 1, wherein, The total volume flow rate of the attached local oxygen supply system ; l is the length of the slot air outlet (4-4), is the oxygen volume concentration of the oxygen generator (1), is the flow velocity of the oxygen-rich air flow coming out of the slot air outlet (4-4).

7. The attachment type local oxygen supply system according to claim 6, wherein, The oxygen volume concentration of the oxygen-rich air flow at the slot air outlet (4-4) is , satisfying: ; Among them, is the volume flow rate of high-purity oxygen provided for the oxygen generator (1), is the air inlet volume flow rate of the air inlet (2-2) of the first static pressure box (2), is the ambient oxygen volume concentration.

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