Compact self-mixing type flow guide air bellow device

Abstract

The invention provides a compact self-mixing type flow guide air bellow device. The compact self-mixing type flow guide air bellow device comprises an upper flow guide air bellow and a lower flow guide air bellow which are fixed to the inner wall of a hot air pipeline and arranged at intervals. The upper flow guide air bellow and the lower flow guide air bellow are respectively positioned on an inner ring and an outer ring of the bending section and are concentrically arranged with the bending section; hot air channels are formed between the upper flow guide air bellow and the lower flow guide air bellow and between the upper flow guide air bellow and the inner side wall of the hot air pipeline and between the lower flow guide air bellow and the inner side wall of the hot air pipeline, so that the direction of hot air entering the hot air pipeline is changed and hot air is primarily shunted; an upper flow guide air box air inlet and a lower flow guide air box air inlet are formed in the positions, corresponding to the two side walls of the upper flow guide air box and the lower flow guide air box, of the hot air pipeline correspondingly and used for being communicated with the cold air pipeline so that cold air entering the hot air pipeline can flow to the horizontal section after being mixed with hot air. The integrated flow guide air bellow device with the functions of flow guide, resistance reduction and cold and hot air mixing is designed creatively from the source, space is saved, and air duct resistance is reduced.

Description

Technical Field

[0001] This invention belongs to the field of airflow guide box technology, specifically relating to a compact self-mixing airflow guide box device. Background Technology

[0002] The layout of large coal-fired power plants is becoming increasingly compact, resulting in unreasonable layout of boiler hot primary air ducts. Within a limited space, there are multiple turning and diameter-changing ducts, and the complex layout of the ducts leads to inaccurate primary air volume testing at the coal mill inlet, making it impossible to accurately control the primary air volume. Furthermore, the resistance of the primary air system is too high, which significantly increases the power consumption of the primary air fan.

[0003] To address the aforementioned issues, it is necessary to propose a compact, self-mixing airflow guide box device that is rationally designed and effectively solves these problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide a compact self-mixing air guide box device.

[0005] This invention provides a compact self-mixing air guide box device for installation inside a hot air duct, wherein the hot air duct has a vertical section, a bending section and a horizontal section connected in sequence, and the air guide box device includes an upper air guide box and a lower air guide box fixed to the inner wall of the hot air duct and spaced apart.

[0006] The upper and lower air guide boxes are located on the inner and outer rings of the bend section, respectively, and are both arranged concentrically with the bend section; wherein,

[0007] Hot air channels are formed between the upper guide air box and the lower guide air box, as well as between the upper guide air box and the lower guide air box and the inner wall of the hot air duct, respectively, to change the direction of the hot air entering the hot air duct and to perform preliminary hot air diversion.

[0008] The hot air duct is provided with an upper guide air box inlet and a lower guide air box inlet on each of the two side walls corresponding to the upper guide air box and the lower guide air box, respectively. The upper guide air box inlet and the lower guide air box inlet are used to connect with the cold air duct so that the cold air entering the hot air duct mixes with the hot air after the initial diversion before flowing to the horizontal section.

[0009] Optionally, the upper air guide box includes an upper air guide box upper panel, an upper air guide box lower panel, and two upper air guide box cold air guide plate assemblies disposed between the upper air guide box upper panel and the upper air guide box lower panel and symmetrically distributed;

[0010] Each of the upper air guide box cold air guide plate groups includes multiple upper air guide box cold air guide plates;

[0011] The first end of the upper panel of the upper guide air box and the first end of the lower panel of the upper guide air box intersect at the vertical section to form the guide blade of the upper guide air box;

[0012] The second end of the upper panel of the upper guide air box and the second end of the lower panel of the upper guide air box bend from the vertical end toward the bending section and extend toward the horizontal section;

[0013] In each of the aforementioned upper airflow guide box cold air guide plate groups, multiple upper airflow guide box cold air guide plates are distributed sequentially at intervals from the edge of the upper panel of the upper airflow guide box towards its center.

[0014] The first end of each upper air guide box cold air guide plate is fixed to the side wall of the hot air duct. The first end of the upper air guide box cold air guide plate bends toward the side wall of the hot air duct and extends toward the horizontal section, so that a first cold air channel is formed between two adjacent upper air guide box cold air guide plates. Each first cold air channel is connected to the air inlet of the upper air guide box.

[0015] Optionally, the upper panel of the upper guide air box is provided with a plurality of upper guide air box air inlets at the first end near the upper panel of the upper guide air box.

[0016] In the two upper airflow guide box cold air guide plate groups, the upper airflow guide box hot air chamber is formed between the two upper airflow guide box cold air guide plates located in the middle area of ​​the upper panel of the upper airflow guide box. The upper airflow guide box hot air chamber has an outlet in the horizontal section.

[0017] The hot air flowing through the upper panel of the upper air guide box enters the hot air chamber of the upper air guide box through multiple air inlets and flows out from the hot air chamber outlet, mixing with the cold air flowing out from the first cold air channel.

[0018] Optionally, the outer wall of the hot air duct is provided with an upper guide air box inlet guide plate corresponding to the lower part of the upper guide air box inlet.

[0019] The air inlet guide plate of the upper guide box is bent toward the top wall of the hot air duct so as to distribute part of the cold air in the first cold air duct to each of the first cold air channels of the upper guide box through the air inlet of the upper guide box.

[0020] Optionally, the lower air guide box includes an upper panel, a lower panel, and two symmetrically distributed cold air guide plate assemblies disposed between the upper panel and the lower panel.

[0021] Each of the lower air guide box cold air guide plate groups includes multiple lower air guide box cold air guide plates;

[0022] The first end of the upper panel of the lower guide air box and the first end of the lower panel of the lower guide air box intersect at the vertical section to form the guide blade of the lower guide air box;

[0023] The second end of the upper panel of the lower guide air box and the second end of the lower panel of the lower guide air box bend from the vertical end toward the bending section and extend toward the horizontal section;

[0024] In each of the lower airflow guide box cold air guide plate groups, multiple lower airflow guide box cold air guide plates are distributed sequentially at intervals from the edge of the upper panel of the lower airflow guide box towards its center.

[0025] The first end of the cold air guide plate of each lower guide box bends toward the side wall of the hot air duct, and the second end of the cold air guide plate of each lower guide box extends toward the horizontal section, so that a second cold air channel is formed between two adjacent lower guide box cold air guide plates, wherein each second cold air channel is connected to the air inlet of the lower guide box.

[0026] Optionally, the upper panel of the lower guide air box is provided with a plurality of lower guide air box air inlets at the first end near the upper panel of the lower guide air box.

[0027] In the two lower guide air box cold air guide plate groups, a lower guide air box hot air chamber is formed between the two lower guide air box cold air guide plates located in the middle area of ​​the upper panel of the lower guide air box, and the lower guide air box hot air chamber has a lower guide air box hot air chamber outlet in the horizontal section.

[0028] The hot air flowing through the upper panel of the lower guide air box enters the hot air chamber of the lower guide air box through multiple air inlets and flows out from the hot air chamber outlet, where it mixes with the cold air flowing out from the second cold air channel.

[0029] Optionally, the outer wall of the hot air duct is provided with a lower guide air box inlet guide plate corresponding to the lower part of the lower guide air box inlet.

[0030] The air inlet guide plate of the lower guide box is bent toward the top wall of the hot air duct so as to distribute part of the cold air in the second cold air duct to each of the second cold air channels of the lower guide box through the air inlet of the lower guide box.

[0031] Optionally, when the upper air guide box includes an upper air guide box inlet guide plate, the extension length of the upper air guide box inlet guide plate is less than the extension length of the lower air guide box inlet guide plate.

[0032] Optionally, the cross-section of the air inlet of the upper guide air box is smaller than the cross-sectional size of the air inlet of the lower guide air box.

[0033] Optionally, both the upper and lower air guide boxes are integrally formed with the hot air duct.

[0034] The compact self-mixing airflow guiding box device of the present invention includes an upper airflow guiding box and a lower airflow guiding box fixed to the inner wall of a hot air duct and spaced apart. The upper airflow guiding box and the lower airflow guiding box are located on the inner and outer rings of the bend section, respectively, and are both arranged concentrically with the bend section. Hot air channels are formed between the upper airflow guiding box and the lower airflow guiding box, and between the upper airflow guiding box and the inner side wall of the hot air duct, respectively, to change the direction of the hot air entering the hot air duct and to perform preliminary diversion of the hot air. The hot air duct is provided with an upper airflow guiding box inlet and a lower airflow guiding box inlet on two side walls corresponding to the upper airflow guiding box and the lower airflow guiding box, respectively. The upper airflow guiding box inlet and the lower airflow guiding box inlet are used to connect with a cold air duct so that the cold air entering the hot air duct mixes with the pre-diverted hot air before flowing to the horizontal section. This invention creatively addresses the root cause by designing an integrated airflow guiding and resistance-reducing device that mixes hot and cold air, solving the problems of inaccurate control of primary air volume and excessive resistance in the primary air duct within the existing air duct layout space. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of a compact self-mixing airflow guide box device according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the upper guide air box inlet and the lower guide air box inlet on both sides of the hot air duct in another embodiment of the present invention.

[0037] Figure 3 This is a general structural diagram of the internal air guide boxes of the hot and cold air duct in another embodiment of the present invention;

[0038] Figure 4 This is a front view, a rear view, and structural diagram of each air guide box for the hot and cold air ducts according to another embodiment of the present invention;

[0039] Figure 5 This is a top view of each of the air guide boxes in another embodiment of the present invention. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 5As shown, the present invention provides a compact self-mixing air guide box device for installation inside a hot air duct 10. The hot air duct 10 has a vertical section, a bent section and a horizontal section connected in sequence. The air guide box device includes an upper air guide box 1 and a lower air guide box 2 fixed to the inner wall of the hot air duct 10 and spaced apart.

[0042] The upper guide air box 1 and the lower guide air box 2 are located on the inner and outer rings of the bend section, respectively, and are both arranged concentrically with the bend section. Specifically, the upper guide air box 1 is made of Q355 stainless steel, located inside the hot air duct 10, extending from the vertical section to the horizontal section, and is located on the inner ring of the bend between the vertical and horizontal sections. The lower guide air box 2 is also made of Q355 stainless steel, located inside the hot air duct 10, extending from the vertical section to the horizontal section, and is located on the outer ring of the bend section between the vertical and horizontal sections. The length of the lower guide air box 2 is greater than the length of the upper guide air box 1 to match the curvature of the bend section.

[0043] Hot air channels are formed between the upper guide air box 1 and the lower guide air box 2, as well as between the upper guide air box 1 and the lower guide air box 2 and the inner wall of the hot air duct 10, to change the direction of the hot air entering the hot air duct 10 and to perform preliminary diversion of the hot air.

[0044] Specifically, as shown in the figure, when hot air enters from the vertical section of the hot air duct 10 and flows downwards, the upper and lower surfaces of the upper guide air box 1 and the lower guide air box 2 simultaneously flow downstream, forming three streams of hot air (see figure). Figure 3 The arrow inside the hot air duct changes the direction of the hot air entering the hot air duct 10 and performs initial diversion of the hot air.

[0045] The hot air duct 10 is provided with an upper guide air box inlet 32 ​​and a lower guide air box inlet 34 on the two side walls corresponding to the upper guide air box 1 and the lower guide air box 2, respectively. The upper guide air box inlet 32 ​​and the lower guide air box inlet 34 are used to connect with the cold air duct 3 so that the cold air entering the hot air duct 10 is mixed with the hot air after the initial diversion before flowing to the horizontal section.

[0046] Specifically, the material of the cold air duct 3 is Q355. The cold air duct 3 includes two cold air branch pipes 31, and the whole is in the shape of an inverted "Y". The main pipe of the cold air duct 3 is located above the bend section of the hot air duct 10. It splits into two cold air branch pipes 31 symmetrically downwards and to the left and right until they are connected to the upper guide air box inlet 32 ​​and the lower guide air box inlet 34 on both sides of the hot air duct 10, so that the cold air enters the upper guide air box 1 and the lower guide air box 2 from the upper guide air box inlet 32 ​​and the lower guide air box inlet 34 respectively.

[0047] The cold air distribution pipe 31 extends diagonally downwards from the cold air duct 3 to the left and right sides until it reaches the two side walls of the hot air duct 10, and then extends vertically downwards until it completely encloses the upper guide air box inlet 32 ​​and the lower guide air box inlet 34 to form a cavity channel. The overall shape is roughly an inverted "Y". The purpose is to distribute the cold air to the left and right sides of the hot air duct 10, and at the same time enter the upper guide air box inlet 32 ​​and the lower guide air box inlet 34 on both sides of the hot air duct 10, so as to further balance the entry of cold and hot air from left and right.

[0048] This invention creatively addresses the root cause by designing an integrated airflow guiding and resistance-reducing device that mixes hot and cold air, solving the problems of inaccurate control of primary air volume and excessive resistance in the primary air duct within the existing air duct layout space.

[0049] For example, such as Figure 3 and Figure 4 As shown, the upper airflow guide box 1 includes an upper panel 12, a lower panel 13, and two symmetrically distributed upper airflow guide plate assemblies positioned between the upper panel 12 and the lower panel 13. The two upper airflow guide plate assemblies are symmetrically distributed along the central axis of the hot air flow direction on the upper panel 12.

[0050] Each upper airflow guide box cold air guide plate assembly includes multiple upper airflow guide box cold air guide plates.

[0051] The first end of the upper panel 12 of the upper guide air box intersects with the first end of the lower panel 13 of the upper guide air box in a vertical section to form the guide blade 11 of the upper guide air box. The guide blade 11 of the upper guide air box is located at the top of the upper guide air box 1, inside the vertical section of the hot air duct 10.

[0052] The second ends of the upper panel 12 and the lower panel 13 of the upper guide air box bend from the vertical end toward the bend and extend toward the horizontal section. In other words, the upper panel 12 and the lower panel 13 of the upper guide air box gradually separate backward from the guide blade 11, forming a space between them. The main purpose is to split the hot air in two, directing it to the upper surface of the upper panel 12 and the lower surface of the lower panel 13, respectively. This forcibly divides the hot air flowing through this area into two streams and directs them to the downstream horizontal section. Both the upper panel 12 and the lower panel 13 of the upper guide air box are designed with a 90° arc, arranged concentrically with the bend of the hot air duct 10.

[0053] In each upper airflow guide box cold air guide plate group, multiple upper airflow guide boxes cold air guide plates are distributed sequentially and at intervals from the edge of the upper panel of the upper airflow guide box towards the center.

[0054] Among them, the first end of each cold air diversion plate of the upper air diversion box is fixed to the side wall of the hot air duct 10. The first end of the cold air diversion plate of the upper air diversion box bends towards the side wall of the hot air duct 10 and then extends towards the horizontal section, so as to form a first cold air passage between adjacent cold air diversion plates of the upper air diversion box. Among them, each first cold air passage is connected to the air inlet 32 of the upper air diversion box.

[0055] Specifically, as Figure 3 and Figure 4 shown, each group of cold air diversion plates of the upper air diversion box includes three cold air diversion plates of the upper air diversion box, namely, the cold air diversion plate 16 of the upper air diversion box, the cold air diversion plate 17 of the upper air diversion box, and the cold air diversion plate 18 of the upper air diversion box. The first ends of the three cold air diversion plates of the upper air diversion box bend towards the side wall of the hot air duct 10 and then extend towards the horizontal section, so that a first cold air passage is formed between the cold air diversion plate 16 and the cold air diversion plate 17 of the upper air diversion box, between the cold air diversion plate 17 and the cold air diversion plate 18 of the upper air diversion box, and between the cold air diversion plate 18 and the side wall of the hot air duct 10. Among them, as Figure 5 shown, the relatively formed cold air diversion plates of the upper air diversion box in the two groups of cold air diversion plates of the upper air diversion box are in the shape of an inverted "儿" character from top to bottom. That is to say, the first end of the first cold air passage is arc-shaped, and the second end is strip-shaped.

[0056] In this embodiment, the main function of each first cold air passage formed by multiple cold air diversion plates of the upper air diversion box is to divert the cold air at the air inlet of the upper air diversion box into the hot air duct, avoid the resistance generated by the direct collision of the directly entering cold air with the hot air, and play a role in reducing the resistance.

[0057] Exemplarily, as Figure 3 and Figure 4 shown, multiple air inlet holes 14 of the upper air diversion box are provided near the first end of the upper panel 12 of the upper air diversion box. Specifically, the multiple air inlet holes 14 of the upper air diversion box are arranged horizontally in the middle front part of the upper panel 12 of the upper air diversion box. The number, aperture, and hole pitch of the air inlet holes 14 of the upper air diversion box are cut according to actual needs, and this embodiment does not make specific limitations. The directions of the multiple air inlet holes 14 of the upper air diversion box are directly opposite to the vertical section of the hot air duct 10.

[0058] An upper air diversion box hot air chamber 15 is formed between the two cold air diversion plates of the upper air diversion box located in the middlemost area of the upper panel 12 of the upper air diversion box. The upper air diversion box hot air chamber 15 has an upper air diversion box hot air chamber outlet 19 in the horizontal section.

[0059] Specifically, as Figure 5As shown, a U-shaped hot air chamber 15 is formed between the two symmetrically distributed upper guide air box cold air guide plates 16 and between the upper guide air box upper panel 12 and the lower guide air box upper panel 13. The upper guide air box hot air chamber 15 has an outlet 19 in its horizontal section. The purpose of the hot air chamber outlet 19 is to allow some hot air to flow out from here, so that it can better mix with the outflowing cold air at the outlet, further improving the mixing effect of cold and hot air.

[0060] The hot air flowing through the upper panel 12 of the upper air guide box enters the hot air chamber 15 of the upper air guide box through multiple air inlets 14 and flows out from the hot air chamber outlet 19 of the upper air guide box, and mixes with the cold air flowing out of the first cold air channel to further improve the mixing effect of hot and cold air.

[0061] For example, such as Figure 4 As shown, the outer side wall of the hot air duct 10 is provided with an upper guide air box inlet guide plate 33 at the lower part of the upper guide air box inlet 32.

[0062] The air inlet guide plate 33 of the upper guide box bends toward the top wall of the hot air duct 10 so as to distribute part of the cold air in the first cold air duct to each of the first cold air channels of the upper guide box 1 through the air inlet 32 ​​of the upper guide box. The air inlet guide plate 33 of the upper guide box and the upper guide box 1 are arranged in concentric circles.

[0063] For example, such as Figure 3 and Figure 4 As shown, the lower air guide box 2 includes an upper panel 22, a lower panel 23, and two cold air guide plate assemblies symmetrically distributed between the upper panel 22 and the lower panel 23.

[0064] Each lower airflow guide box cold air guide plate assembly includes multiple lower airflow guide boxes cold air guide plates. Among them, two lower airflow guide box cold air guide plate assemblies are symmetrically distributed along the central axis of the hot air flow direction on the upper panel 22 of the lower airflow guide box.

[0065] The first end of the upper panel 22 of the lower guide air box intersects with the first end of the lower panel 23 of the lower guide air box in a vertical section to form the guide blade 21 of the lower guide air box. The guide blade 21 of the lower guide air box is located at the top of the lower guide air box 1, inside the vertical section of the hot air duct 10.

[0066] The second ends of the upper panel and the lower panel of the lower diversion air box bend from the vertical end towards the bending section and extend towards the horizontal section. That is to say, the upper panel 22 and the lower panel 23 of the lower diversion air box gradually separate from the diversion edge 21 of the lower diversion air box backwards, forming a space between them. The main purpose is to divide the hot air into two parts and guide the hot air to flow on the upper surface of the upper panel 22 and the lower surface of the lower panel 23 of the lower diversion air box respectively, forcing the hot air flowing through this area to be divided into two streams and guiding them to the downstream horizontal section. Among them, both the upper panel 22 and the lower panel 23 of the lower diversion air box are designed with a 90° arc and are concentric with the bending section of the hot air duct 10.

[0067] In each group of cold air diversion plates of the lower diversion air box, multiple cold air diversion plates of the lower diversion air box are distributed at intervals in sequence from the edge of the upper panel of the lower diversion air box towards the middle thereof.

[0068] Among them, the first end of each cold air diversion plate of the lower diversion air box bends towards the side wall of the hot air duct 10, and the second end of each cold air diversion plate of the lower diversion air box extends towards the horizontal section, so as to form a second cold air passage between adjacent cold air diversion plates of the lower diversion air box. Among them, each second cold air passage is connected to the air inlet of the lower diversion air box.

[0069] Specifically, as Figure 3 and Figure 4 shown, each group of cold air diversion plates of the lower diversion air box includes three cold air diversion plates of the upper diversion air box, namely, the cold air diversion plate 26, the cold air diversion plate 27 and the cold air diversion plate 28 of the lower diversion air box. The first ends of the three cold air diversion plates of the upper diversion air box bend towards the side wall of the hot air duct 10 and then extend towards the horizontal section, so that a second cold air passage is formed between the cold air diversion plate 26 and the cold air diversion plate 27 of the lower diversion air box, between the cold air diversion plate 27 and the cold air diversion plate 28 of the lower diversion air box, and between the cold air diversion plate 28 of the lower diversion air box and the side wall of the hot air duct 10. Among them, as Figure 5 shown, the relatively formed cold air diversion plates of the lower diversion air box in two groups of cold air diversion plates of the lower diversion air box are in the shape of an inverted "r" character from top to bottom. That is to say, the first end of the second cold air passage is arc-shaped and the second end is strip-shaped.

[0070] In this embodiment, the main function of each second cold air passage formed by multiple cold air diversion plates of the lower diversion air box is to divert the cold air at the air inlet of the lower diversion air box into the hot air duct, avoiding the resistance generated by the direct collision of the directly entering cold air with the hot air, and playing a role in reducing the resistance.

[0071] Exemplarily, as Figure 1 、 Figure 4 and Figure 5As shown, a plurality of lower air guide box air inlets 24 are provided at the first end of the upper panel 22 of the lower air guide box. Specifically, the plurality of lower air guide box air inlets 24 are arranged horizontally in the middle front part of the upper panel 22 of the lower air guide box. The number, diameter and spacing of the lower air guide box air inlets 24 are cut according to actual needs. This embodiment does not make specific limitations. The direction of the plurality of lower air guide box air inlets 24 is directly opposite to the vertical section of the hot air duct 10.

[0072] In the two lower guide air box cold air guide plate groups, the two lower guide air box cold air guide plates located in the middle area of ​​the upper panel 22 of the lower guide air box form a lower guide air box hot air chamber 25. The lower guide air box hot air chamber 25 has a lower guide air box hot air chamber outlet 29 in the horizontal section.

[0073] Specifically, a U-shaped hot air chamber 25 is formed between the two symmetrically distributed lower air guide box cold air guide plates 26 and between the upper panel 22 and the upper panel 23 of the lower air guide box. The purpose of the hot air chamber 25 is to allow some hot air to flow out from here, so that it can better mix with the outflowing cold air at the outlet, further improving the mixing effect of cold and hot air.

[0074] The hot air flowing through the upper panel 22 of the lower guide air box enters the hot air chamber 25 of the lower guide air box through multiple air inlets 24 and flows out from the hot air chamber outlet 29 of the lower guide air box, and mixes with the cold air flowing out of the second cold air channel to further improve the mixing effect of hot and cold air.

[0075] For example, a lower guide vane 35 is provided on the outer wall of the hot air duct 10 at the lower part of the lower guide vane inlet 34. The function of the lower guide vane 35 is to reduce the resistance of the cold air flowing through this area and guide it to the lower guide vane inlet 34.

[0076] The air inlet guide plate 35 of the lower guide box bends toward the top wall of the hot air duct 10 to distribute part of the cold air in the second cold air duct to each of the second cold air channels of the lower guide box 2 through the air inlet 34 of the lower guide box. The air inlet guide plate 35 of the lower guide box and the lower guide box 2 are arranged in concentric circles.

[0077] For example, when the upper guide air box 1 includes an upper guide air box inlet guide plate 33, the extension length of the upper guide air box inlet guide plate 33 is less than the extension length of the lower guide air box inlet guide plate 35, so as to ensure that after the upper guide air box inlet guide plate 33 distributes part of the cold air in the first cold air duct to each of the first cold air channels of the upper guide air box 1 through the upper guide air box inlet 32, the remaining cold air can continue to enter the lower guide air box inlet guide plate 35.

[0078] For example, the cross-sectional area of ​​the upper guide vane inlet 32 ​​is smaller than that of the lower guide vane inlet 34. Considering that the lower guide vane inlet 34 is downstream of the upper guide vane inlet 32 ​​and its resistance is slightly greater than that of the upper guide vane inlet 32, the cross-sectional area of ​​the lower guide vane inlet 34 is set to be larger than that of the upper guide vane inlet 32 ​​to reduce resistance and achieve a balance in the amount of cold air entering from the upper and lower parts.

[0079] For example, in this embodiment, both the upper air guide box 1 and the lower air guide box 2 are integrally formed with the hot air duct 10, which effectively saves space.

[0080] For example, the cold air in the cold air duct 3 enters the first cold air duct and the second cold air duct from the side wall of the hot air duct 10. Then, at the outlet of each cold air duct, it mixes with the hot air at the outlet 19 of the hot air chamber of the upper guide air box, the hot air at the outlet 29 of the hot air chamber of the lower guide air box, and the hot air that has been initially diverted by the first guide air box 1 and the second guide air box 2, and then enters the horizontal end of the hot air duct 10.

[0081] like Figures 1 to 5 As shown, the operation process of the compact self-mixing airflow guide box device of the present invention is as follows:

[0082] When hot air flows downward from the upper part of the vertical section of the hot air duct 10, it simultaneously passes through the upper guide vane 11 of the upper guide vane 1 and the lower guide vane 21 of the lower guide vane 2, dividing the hot air into three streams: upper, middle, and lower. These streams flow downstream along the outer surfaces of the upper panel 12, lower panel 13, upper panel 22, and lower panel 13 (lower panel 23) of the lower guide vane, respectively (see...). Figure 2 (Arrow direction inside the hot air duct).

[0083] The upper panel 12 of the upper guide air box and the upper panel 22 of the lower guide air box have upper guide air box inlet 14 and lower guide air box inlet 24 respectively. A small portion of hot air flows from the upper guide air box inlet 14 and the lower guide air box inlet 24 into the upper guide air box hot air chamber 15 between the upper guide air box upper panel 12 and the upper guide air box lower panel 13 of the upper guide air box 1 and the lower guide air box hot air chamber 25 between the lower guide air box upper panel 22 and the upper guide air box lower panel 23 of the lower guide air box 2, and then flows out from the upper guide air box hot air chamber outlet 19 and the lower guide air box hot air chamber outlet 29, and then mixes with the cold air flowing in from the left and right sides of the hot air duct 10.

[0084] When cold air flows from the cold air duct 3 to the symmetrical cold air branch pipes 31 on the left and right sides, and then to the symmetrically designed upper guide air box inlet 32 ​​and lower guide air box inlet 34 on both sides of the hot air duct 10 (see...) Figure 4The cold air first flows through the air inlet guide plate 33 of the upper guide air box, and a portion of the air is distributed to the side of the upper guide air box 1 through the air inlet 32 ​​of the upper guide air box. Then the remaining air volume continues to flow downward and is guided by the air inlet guide plate 35 of the lower guide air box to the air inlet 34 of the lower guide air box, and then enters the side of the lower guide air box 2.

[0085] Cold air enters both sides of the upper guide air box 1 through the air inlet 32. Under the action of the upper guide air box cold air guide plates 16, 17, and 18, the airflow on each side is divided into three streams, dispersing them as evenly as possible into the hot air duct 10 and mixing with the hot air. Simultaneously, it flows downstream of the duct along with the cold air exiting the lower guide air box 2 (see...). Figure 3 The mixing over a distance makes the temperature of the hot and cold air more uniform. The flow through the porous rectifier plate further makes the temperature and velocity evenly distributed in each area of ​​the cross section, thereby improving the accuracy of temperature and wind speed. The process of the cold air in the lower layer entering the two sides of the lower guide air box 2 from the air inlet 34 of the lower guide air box is the same as that of the upper guide air box 1, and no further description is needed here.

[0086] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A compact, self-mixing airflow guide box device for installation within a hot air duct, the hot air duct having a vertical section, a bent section, and a horizontal section connected in sequence, characterized in that, The air guide box device includes an upper air guide box and a lower air guide box that are fixed to the inner wall of the hot air duct and are spaced apart. The upper and lower air guide boxes are located on the inner and outer rings of the bend section, respectively, and are both arranged concentrically with the bend section; wherein, Hot air channels are formed between the upper guide air box and the lower guide air box, as well as between the upper guide air box and the lower guide air box and the inner wall of the hot air duct, respectively, to change the direction of the hot air entering the hot air duct and to perform preliminary hot air diversion. The hot air duct is provided with an upper guide air box inlet and a lower guide air box inlet on each of the two side walls corresponding to the upper guide air box and the lower guide air box, respectively. The upper guide air box inlet and the lower guide air box inlet are used to connect with the cold air duct so that the cold air entering the hot air duct mixes with the hot air after the initial diversion before flowing to the horizontal section.

2. The apparatus according to claim 1, characterized in that, The upper air guide box includes an upper air guide box upper panel, an upper air guide box lower panel, and two upper air guide box cold air guide plate assemblies disposed between the upper air guide box upper panel and the upper air guide box lower panel and symmetrically distributed; Each of the upper air guide box cold air guide plate groups includes multiple upper air guide box cold air guide plates; The first end of the upper panel of the upper guide air box and the first end of the lower panel of the upper guide air box intersect at the vertical section to form the guide blade of the upper guide air box; The second end of the upper panel of the upper guide air box and the second end of the lower panel of the upper guide air box bend from the vertical end toward the bending section and extend toward the horizontal section; In each of the aforementioned upper airflow guide box cold air guide plate groups, multiple upper airflow guide box cold air guide plates are distributed sequentially at intervals from the edge of the upper panel of the upper airflow guide box towards its center. The first end of each upper air guide box cold air guide plate is fixed to the side wall of the hot air duct. The first end of the upper air guide box cold air guide plate bends toward the side wall of the hot air duct and extends toward the horizontal section, so that a first cold air channel is formed between two adjacent upper air guide box cold air guide plates. Each first cold air channel is connected to the air inlet of the upper air guide box.

3. The apparatus according to claim 2, characterized in that, The upper panel of the upper guide air box is provided with a plurality of upper guide air box air inlets at the first end near the upper panel of the upper guide air box. In the two upper airflow guide box cold air guide plate groups, the upper airflow guide box hot air chamber is formed between the two upper airflow guide box cold air guide plates located in the middle area of ​​the upper panel of the upper airflow guide box. The upper airflow guide box hot air chamber has an outlet in the horizontal section. The hot air flowing through the upper panel of the upper air guide box enters the hot air chamber of the upper air guide box through multiple air inlets and flows out from the hot air chamber outlet, mixing with the cold air flowing out from the first cold air channel.

4. The apparatus according to claim 3, characterized in that, The outer wall of the hot air duct is provided with an upper guide air box inlet guide plate corresponding to the lower part of the upper guide air box inlet. The air inlet guide plate of the upper guide box is bent toward the top wall of the hot air duct so as to distribute part of the cold air in the first cold air duct to each of the first cold air channels of the upper guide box through the air inlet of the upper guide box.

5. The apparatus according to claim 1, characterized in that, The lower air guide box includes an upper panel, a lower panel, and two symmetrically distributed cold air guide plate assemblies between the upper panel and the lower panel. Each of the lower air guide box cold air guide plate groups includes multiple lower air guide box cold air guide plates; The first end of the upper panel of the lower guide air box and the first end of the lower panel of the lower guide air box intersect at the vertical section to form the guide blade of the lower guide air box; The second end of the upper panel of the lower guide air box and the second end of the lower panel of the lower guide air box bend from the vertical end toward the bending section and extend toward the horizontal section; In each of the lower airflow guide box cold air guide plate groups, multiple lower airflow guide box cold air guide plates are distributed sequentially at intervals from the edge of the upper panel of the lower airflow guide box towards its center. The first end of the cold air guide plate of each lower guide box bends toward the side wall of the hot air duct, and the second end of the cold air guide plate of each lower guide box extends toward the horizontal section, so that a second cold air channel is formed between two adjacent lower guide box cold air guide plates, wherein each second cold air channel is connected to the air inlet of the lower guide box.

6. The apparatus according to claim 5, characterized in that, The upper panel of the lower guide air box is provided with a plurality of lower guide air box air inlets at the first end near the upper panel of the lower guide air box. In the two lower guide air box cold air guide plate groups, a lower guide air box hot air chamber is formed between the two lower guide air box cold air guide plates located in the middle area of ​​the upper panel of the lower guide air box, and the lower guide air box hot air chamber has a lower guide air box hot air chamber outlet in the horizontal section. The hot air flowing through the upper panel of the lower guide air box enters the hot air chamber of the lower guide air box through multiple air inlets and flows out from the hot air chamber outlet, where it mixes with the cold air flowing out from the second cold air channel.

7. The apparatus according to claim 6, characterized in that, The outer wall of the hot air duct is provided with a lower guide plate for the air inlet of the lower guide box. The air inlet guide plate of the lower guide box is bent toward the top wall of the hot air duct so as to distribute part of the cold air in the second cold air duct to each of the second cold air channels of the lower guide box through the air inlet of the lower guide box.

8. The apparatus according to claim 7, characterized in that, When the upper air guide box includes an upper air guide box inlet guide plate, the extension length of the upper air guide box inlet guide plate is less than the extension length of the lower air guide box inlet guide plate.

9. The apparatus according to any one of claims 1 to 8, characterized in that, The cross-section of the air inlet of the upper guide air box is smaller than the cross-sectional size of the air inlet of the lower guide air box.

10. The apparatus according to any one of claims 1 to 8, characterized in that, Both the upper and lower air guide boxes are integrally formed with the hot air duct.

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