Air duct and air-cooled fuel cell

Abstract

The present invention relates to the technical field of air-cooled fuel cells, and in particular to an air duct and an air-cooled fuel cell, the air duct comprising: a shell, a wind collecting tube inserted at the center of the shell, the diameter of the wind collecting tube gradually decreases from the air inlet to the air outlet, a first flow cavity is formed in the wind collecting tube, the outer wall surface of the wind collecting tube forms a second flow cavity with the left inner wall surface of the shell, and forms a third flow cavity with the right inner wall surface of the shell; when the fan blows air to the air duct with the same air volume as the prior art, the first flow cavity, the second flow cavity and the third flow cavity cooperate with each other to ensure that the wind speed at each location of the air outlet of the air duct in this scheme is uniform, thereby ensuring that the heat dissipation effect at each location of the air-cooled fuel cell stack is equal, and effectively protecting the safe use of the cold fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of air-cooled fuel cells, and in particular to an air duct and an air-cooled fuel cell. Background Art

[0002] When the air duct of the prior art is used in conjunction with a fan, the air outlet of the fan is divergent, resulting in uneven wind speed at various locations of the air duct outlet, i.e., the wind speed at the middle position is significantly lower than the wind speed at the surroundings, resulting in unequal heat dissipation effects at various locations of the air-cooled fuel cell stack connected to the air duct, i.e., the heat dissipation effects at the surroundings are significantly higher than the heat dissipation effects at the middle position, ultimately leading to local overheating at the middle position of the air-cooled fuel cell stack, directly causing damage to the cold fuel cells. Summary of the invention

[0003] (I) In view of this, an embodiment of the present invention provides an air duct and an air-cooled fuel cell to alleviate the technical problem of uneven wind speed at various locations of the existing air duct outlet.

[0004] (II) Technical solution

[0005] In order to achieve the above-mentioned purpose, the first aspect of an embodiment of the present invention proposes an air duct, comprising: a shell, a wind collecting tube inserted at the center of the shell, the diameter of the wind collecting tube gradually decreases from the air inlet to the air outlet, a first flow cavity is formed in the wind collecting tube, and the outer wall surface of the wind collecting tube forms a second flow cavity with the left inner wall surface of the shell, and forms a third flow cavity with the right inner wall surface of the shell.

[0006] Optionally, a first mounting frame for connecting to a fan is provided at the air inlet of the shell, and a second mounting frame for connecting to an air-cooled fuel cell stack is provided at the air outlet of the shell.

[0007] Optionally, at least one adjusting device is provided at the air outlet of the air concentrator, and the adjusting device is used to adjust the size of the air outlet.

[0008] Optionally, the adjusting device comprises:

[0009] An adjusting slide rod, threadedly connected to the second mounting frame;

[0010] An adjusting knob, arranged at the end of the adjusting slide rod extending out of the second mounting frame;

[0011] The adjusting slide is arranged at the end of the adjusting slide bar close to the air outlet, and is used for moving towards or away from the air outlet under the driving of the adjusting slide bar.

[0012] Optionally, the adjusting slide is arranged in a semicircular shape.

[0013] Optionally, there are two regulating devices, which are symmetrically arranged at two ends of the air outlet.

[0014] Optionally, the shell and / or wind concentrator is composed of a plurality of overlapping blades, and every two adjacent blades are connected via a movable component.

[0015] Optionally, the movable component includes: a first connecting member and a second connecting member that match each other, one of which is arranged on the inner wall surface of one of the blades, and the other is arranged on the outer wall surface of the blade overlapping with it.

[0016] Optionally, one of the first connecting member and the second connecting member is configured as a protrusion, and the other is configured as a sliding groove.

[0017] Optionally, the blade is configured as an arc-shaped structure, and the slide groove is configured along the inner wall surface of the arc-shaped blade.

[0018] In order to achieve the above-mentioned purpose, the second aspect of an embodiment of the present invention proposes an air-cooled fuel cell, comprising: a fan, an air-cooled fuel cell stack and an air duct as described in any of the above items, the air inlet of the air duct is connected to the air outlet of the fan, and the air outlet of the air duct is connected to the air-cooled fuel cell stack.

[0019] (III) Beneficial effects:

[0020] The embodiments of the present invention have the following advantages or beneficial effects:

[0021] An air duct and an air-cooled fuel cell provided by an embodiment of the present invention include: a shell, a wind collecting cylinder is inserted at the center of the shell, the diameter of the wind collecting cylinder gradually decreases from the air inlet to the air outlet, a first flow cavity is formed in the wind collecting cylinder, and the outer wall surface of the wind collecting cylinder forms a second flow cavity with the left inner wall surface of the shell, and forms a third flow cavity with the right inner wall surface of the shell; when the fan blows air to the air duct with the same air volume as the prior art, the cold air entering through the air inlet of the first flow cavity will be gathered by the wind collecting cylinder, thereby effectively increasing the wind speed at the air outlet of the first flow cavity, that is, effectively increasing the wind speed in the prior art. The wind speed in the middle of the air duct. At the same time, since the area of ​​the air outlet of the second circulation chamber and the third circulation chamber is larger than the area of ​​the air inlet, the cold air entering through the air inlets of the second circulation chamber and the third circulation chamber is dispersed by the air outlet, thereby effectively reducing the wind speed at the air outlet of the second circulation chamber and the third circulation chamber, that is to say, effectively improving the wind speed around the air duct in the prior art. In summary, through the cooperation of the first circulation chamber, the second circulation chamber and the third circulation chamber, the wind speed at each part of the air outlet of the air duct in this scheme is guaranteed to be uniform, thereby ensuring equal heat dissipation effect at each part of the air-cooled fuel cell stack, and effectively protecting the safe use of the cold fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0023] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 A schematic diagram of the air duct structure at an angle in the present invention;

[0025] Figure 2 A schematic diagram of the air duct structure from another angle in the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the air condenser in the present invention when it is in a contracted state;

[0027] Figure 4 It is a schematic diagram of the structure of the air collecting tube in the expanded state of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the air-cooled fuel cell in the present invention;

[0029] Figure 6 It is an exploded diagram of the air-cooled fuel cell in the present invention.

[0030] In the figure: 1. Shell; 2. Wind collecting tube; 3. Air inlet; 4. Air outlet; 5. First circulation chamber; 6. Second circulation chamber; 7. Third circulation chamber; 8. First mounting frame; 9. Second mounting frame; 10. Fan; 11. Fuel cell stack; 12. Adjustment device; 13. Adjustment slide rod; 14. Adjustment knob; 15. Adjustment slide; 16. Blade. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0033] like Figure 1-Figure 4As shown, the first aspect of the present application provides an air duct, comprising: a housing 1, such as Figure 2 As shown, the housing 1 is generally designed as a rectangular structure, that is, the air inlet 3 and the air outlet 4 have equal areas;

[0034] A wind collecting tube 2 is inserted in the center of the housing 1. Figure 1 and Figure 2 As shown, the viewing angles in the figure are all from the air outlet 4 to the air inlet 3, the diameter of the air condenser 2 gradually decreases along the direction from the air inlet 3 to the air outlet 4, and a first flow cavity 5 is formed in the air condenser 2. At this time, the area of ​​the air outlet 4 of the first flow cavity 5 is smaller than the area of ​​the air inlet 3 of the first flow cavity 5, thereby effectively increasing the wind speed out of the first flow cavity 5;

[0035] The outer wall surface of the air collecting tube 2 respectively forms a second circulation cavity 6 with the left inner wall surface of the shell 1, and forms a third circulation cavity 7 with the right inner wall surface of the shell 1; that is to say, at this time, the third circulation cavity 7 and the second circulation cavity 6 are symmetrically designed. Specifically, taking the second circulation cavity 6 as an example for explanation, at this time, the area of ​​the air outlet 4 formed by the outer wall surface of the air outlet 4 of the air collecting tube 2 and the left inner wall surface of the shell 1 is larger than the area of ​​the air inlet 3 formed by the outer wall surface of the air inlet 3 of the air collecting tube 2 and the left inner wall surface of the shell 1, thereby causing the cold air entering through the air inlet 3 of the second circulation cavity 6 to be dispersed by the air outlet 4, thereby effectively reducing the wind speed at the air outlet 4 of the second circulation cavity 6;

[0036] The third circulation cavity 7 also has the same design. Specifically, the area of ​​the air outlet 4 formed by the outer wall surface of the air outlet 4 of the air collecting tube 2 and the inner wall surface on the right side of the shell 1 is larger than the area of ​​the air inlet 3 formed by the outer wall surface of the air inlet 3 of the air collecting tube 2 and the inner wall surface on the right side of the shell 1. As a result, the cold air entering through the air inlet 3 of the third circulation cavity 7 is dispersed by the air outlet 4, thereby effectively reducing the wind speed at the air outlet 4 of the third circulation cavity 7.

[0037] During use, when the fan 10 blows air into the air duct with the same air volume as that in the prior art, the cold air entering through the air inlet 3 of the first circulation chamber 5 will be gathered by the air collecting tube 2, thereby effectively increasing the wind speed at the air outlet 4 of the first circulation chamber 5, which means that the wind speed in the middle position of the air duct in the prior art is effectively increased. At the same time, since the area of ​​the air outlet 4 of the second circulation chamber 6 and the third circulation chamber 7 is larger than the area of ​​the air inlet 3, the cold air entering through the air inlet 3 of the second circulation chamber 6 and the third circulation chamber 7 is dispersed by the air outlet 4, thereby effectively reducing the wind speed at the air outlet 4 of the second circulation chamber 6 and the third circulation chamber 7, which means that the wind speed around the air duct in the prior art is effectively increased. The two effects are superimposed, thereby ensuring that the wind speed at each location of the air outlet 4 of the air duct in this scheme is uniform, thereby ensuring that the heat dissipation effect at each location of the air-cooled fuel cell stack 11 is equal, and effectively protecting the safe use of the cold fuel cells.

[0038] According to one embodiment of the present invention, Figure 1 As shown, the air inlet 3 of the housing 1 is provided with a first mounting frame 8 for connecting to the fan 10, and the air outlet 4 of the housing 1 is provided with a second mounting frame 9 for connecting to the air-cooled fuel cell stack 11. When assembling, as shown in FIG. Figure 5 and Figure 6 As shown, the air duct is inserted into the housing 1 of the fan 10. At this time, the air inlet 3 of the air duct is connected with the air outlet 4 of the fan 10 through the first mounting frame 8, and the air outlet 4 of the air duct is connected with the air-cooled fuel cell stack 11 through the second mounting frame 9. The side wall surface of the housing 1 of the fan 10 is respectively connected to the air duct and the air-cooled fuel cell stack 11 by bolts.

[0039] According to one embodiment of the present invention, in order to further increase the wind speed at the air outlet 4 of the first flow cavity 5, as shown in FIG. Figure 1 and Figure 2 As shown, at least one adjusting device 12 is provided at the air outlet 4 of the air collecting tube 2, and the adjusting device 12 is used to adjust the size of the air outlet 4. Preferably, two adjusting devices 12 are provided, and the two adjusting devices 12 are symmetrically arranged at both ends of the air outlet 4. When in use, when it is necessary to increase the wind speed of the air outlet 4 of the first circulation cavity 5, it is only necessary to drive the adjusting device 12 to move in the direction of covering part of the air outlet 4, and the specific covering degree can be adjusted according to the air outlet rate requirement. When it is necessary to increase the air outlet rate, the covering degree can be increased accordingly. On the contrary, when it is necessary to reduce the wind speed of the air outlet 4 of the first circulation cavity 5, it is only necessary to drive the adjusting device 12 to move in the direction of leaking the air outlet 4.

[0040] Specifically, the adjusting device 12 includes:

[0041] The adjusting slide rod 13 is threadedly connected to the second mounting frame 9;

[0042] An adjusting knob 14 is arranged at the end of the adjusting slide rod 13 extending out of the second mounting frame 9;

[0043] The adjusting slide 15 is arranged at the end of the adjusting slide rod 13 close to the air outlet 4, and is used to move towards or away from the air outlet 4 under the drive of the adjusting slide rod 13;

[0044] During use, when it is necessary to increase the wind speed at the air outlet 4 of the first circulation cavity 5, the adjusting knob 14 is rotated clockwise to cause the adjusting slide bar 13 to push the adjusting slide plate 15 to move closer to the air outlet 4 to cover part of the air outlet 4; on the contrary, when it is necessary to reduce the wind speed at the air outlet 4 of the first circulation cavity 5, the adjusting knob 14 is rotated counterclockwise to cause the adjusting slide bar 13 to push the adjusting slide plate 15 to move away from the air outlet 4 to leak out the air outlet 4.

[0045] According to one embodiment of the present invention, Figure 1 and Figure 2As shown, the adjustment slide 15 is arranged to be semicircular, and the semicircle can be connected to the adjustment slide rod 13 with a vertical edge as shown in the figure. Of course, the arc edge of the semicircular structure can be connected to the adjustment slide rod 13, and when the two semicircular adjustment slides 15 collide with each other, they just block the air outlet 4 of the entire first circulation cavity 5. At this time, the air duct can only discharge air through the second circulation cavity 6 and the third circulation cavity 7, thereby expanding the scope of application of the air duct in the present application.

[0046] According to one embodiment of the present invention, the housing 1 and / or the air collecting cylinder 2 is composed of a plurality of overlapping blades 16, and each two adjacent blades 16 are connected by a movable component;

[0047] In one of the embodiments, in order to adapt to the size requirements of fuel cell stacks 11 and fans 10 of different sizes, the shell 1 is composed of a plurality of overlapping blades 16, and each adjacent two blades 16 are connected by a movable component. When the fuel cell stack 11 and fan 10 to be connected are large in size, it is only necessary to increase the distance between each adjacent two blades 16 through the movable component to increase the size of the shell 1; when the fuel cell stack 11 and fan 10 to be connected are small in size, it is only necessary to reduce the distance between each adjacent two blades 16 through the movable component to reduce the size of the shell 1.

[0048] In another embodiment, in order to further increase the wind speed at the air outlet 4 of the first flow cavity 5, as Figure 3 and Figure 4 As shown, the wind concentrator 2 is composed of a plurality of overlapping blades 16, and each adjacent blade 16 is connected by a movable component. When it is necessary to further increase the wind speed at the air outlet 4 of the first circulation cavity 5, it is only necessary to reduce the distance between each adjacent blade 16 through the movable component, that is, to contract the wind concentrator 2, so that the area of ​​the air outlet 4 of the first circulation cavity 5 is reduced, thereby achieving the effect of increasing the wind speed at the air outlet 4 of the first circulation cavity 5. On the contrary, when it is necessary to reduce the wind speed at the air outlet 4 of the first circulation cavity 5, it is only necessary to increase the distance between each adjacent blade 16 through the movable component, that is, to expand the wind concentrator 2, so that the area of ​​the air outlet 4 of the first circulation cavity 5 is increased, thereby achieving the effect of reducing the wind speed at the air outlet 4 of the first circulation cavity 5.

[0049] Specifically, the movable component includes: a first connecting member and a second connecting member that match each other, one of which is arranged on the inner wall surface of one of the blades 16, and the other is arranged on the outer wall surface of the blade 16 that overlaps with it; preferably, one of the first connecting member and the second connecting member is arranged as a protrusion, and the other is arranged as a slide groove. In this embodiment, the first connecting member is arranged as a slide groove, and the second connecting member is arranged as a protrusion;

[0050] Taking the wind collecting tube 2 as an example, when it is necessary to further increase the wind speed at the air outlet 4 of the first circulation cavity 5, it is only necessary to squeeze a plurality of blades 16 to cause the corresponding blades 16 to move in overlapping directions with the cooperation of the protrusions and the slide grooves, so that the wind collecting tube 2 can be contracted, thereby reducing the area of ​​the air outlet 4 of the first circulation cavity 5, and finally achieving the effect of increasing the wind speed at the air outlet 4 of the first circulation cavity 5. On the contrary, when it is necessary to reduce the wind speed at the air outlet 4 of the first circulation cavity 5, it is only necessary to pull a plurality of blades 16 to cause the corresponding blades 16 to move in staggered directions with the cooperation of the protrusions and the slide grooves, so that the wind collecting tube 2 can be expanded, thereby expanding the area of ​​the air outlet 4 of the first circulation cavity 5, and finally achieving the effect of reducing the wind speed at the air outlet 4 of the first circulation cavity 5.

[0051] When the wind collecting tube 2 is composed of a plurality of overlapping blades 16 , the blades 16 are arranged as an arc structure, and the slide groove is arranged along the inner wall surface of the arc blade 16 , so as to facilitate the protrusion to slide in the slide groove to realize the contraction and expansion of the wind collecting tube 2 .

[0052] like Figure 5-Figure 6 As shown, the second aspect of the present application provides an air-cooled fuel cell, comprising: a fan 10, an air-cooled fuel cell stack 11 and an air duct as described in any of the foregoing items, the air inlet 3 of the air duct is connected to the air outlet 4 of the fan 10, and the air outlet 4 of the air duct is connected to the air-cooled fuel cell stack 11.

[0053] Each embodiment in this specification is described in a progressive manner, and some embodiments focus on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying importance; the words "bottom surface" and "top surface", "inside" and "outside" refer to the geometric direction toward or away from a specific component, respectively.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air duct, characterized in that: include: A shell (1), wherein a wind collecting tube (2) is inserted at the center of the shell (1), the diameter of the wind collecting tube (2) gradually decreases along the direction from the air inlet (3) to the air outlet (4), a first flow cavity (5) is formed in the wind collecting tube (2), the outer wall surface of the wind collecting tube (2) respectively forms a second flow cavity (6) with the left inner wall surface of the shell (1), and forms a third flow cavity (7) with the right inner wall surface of the shell (1), and the third flow cavity (7) and the second flow cavity (6) are symmetrically designed; The air outlet area formed by the outer wall surface of the air outlet of the air collecting tube (2) and the left inner wall surface of the shell (1) is larger than the air inlet area formed by the outer wall surface of the air inlet of the air collecting tube (2) and the left inner wall surface of the shell (1); the air outlet area formed by the outer wall surface of the air outlet of the air collecting tube (2) and the right inner wall surface of the shell (1) is larger than the air inlet area formed by the outer wall surface of the air inlet of the air collecting tube (2) and the right inner wall surface of the shell (1); A first mounting frame (8) for connecting to a fan (10) is provided at the air inlet (3) of the housing (1), and a second mounting frame (9) for connecting to an air-cooled fuel cell stack (11) is provided at the air outlet (4) of the housing (1); At least one adjusting device (12) is provided at the air outlet (4) of the air collecting cylinder (2), and the adjusting device (12) is used to adjust the size of the air outlet (4); The regulating device (12) comprises: An adjusting slide rod (13) threadedly connected to the second mounting frame (9); An adjusting knob (14) is arranged at the end of the adjusting slide rod (13) extending out of the second installation frame (9); The adjusting slide (15) is arranged at the end of the adjusting slide rod (13) close to the air outlet (4), and is used to move towards or away from the air outlet (4) under the drive of the adjusting slide rod (13).

2. The air duct according to claim 1, characterized in that: The regulating devices (12) are provided in two numbers, and the two regulating devices (12) are symmetrically arranged at two ends of the air outlet (4).

3. The air duct according to claim 1, characterized in that: The shell (1) and / or the air collecting cylinder (2) is composed of a plurality of blades (16) overlapping each other, and each two adjacent blades (16) are connected via a movable component.

4. The air duct according to claim 3, characterized in that: The movable assembly comprises a first connecting member and a second connecting member that match each other, one of which is arranged on the inner wall surface of one of the blades (16), and the other is arranged on the outer wall surface of the blade (16) that overlaps with it.

5. The air duct according to claim 4, characterized in that: One of the first connecting member and the second connecting member is configured as a protrusion, and the other is configured as a sliding groove.

6. The air duct according to claim 5, characterized in that: The blade (16) is arranged as an arc-shaped structure, and the slide groove is arranged along the inner wall surface of the arc-shaped blade (16).

7. An air-cooled fuel cell, characterized in that: include: A fan (10), an air-cooled fuel cell stack (11), and an air duct as described in any one of claims 1 to 6, wherein the air inlet (3) of the air duct is connected to the air outlet (4) of the fan (10), and the air outlet (4) of the air duct is connected to the air-cooled fuel cell stack (11).

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