A hybrid flow device and air mixing box
By designing the flow guiding channel and the bypass channel, the mixer achieves high-efficiency mixing and low pressure drop, solving the problems of low mixing efficiency and high pressure drop in the existing technology, and improving the compactness of the unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN ENVICOOL TECH
- Filing Date
- 2024-12-31
- Publication Date
- 2026-06-30
AI Technical Summary
Existing mixers have low mixing efficiency and high pressure drop, making it impossible to simultaneously improve mixing efficiency, increase unit compactness, and reduce pressure drop.
The mixing structure employs a flow guide channel and a flow bypass channel. The fluid medium is guided to the bottom of the mixing chamber through the flow guide channel and then flows out of the mixing chamber upwards through the flow bypass channel. The design of the flow guide plate and the flow bypass plate increases the mixing uniformity of the fluid medium in the mixing chamber and reduces the pressure drop.
Without increasing the unit size, it improves the mixing efficiency of the fluid medium, reduces the pressure drop, and enhances the mixing uniformity of the fluid medium, thus overcoming the shortcomings of traditional mixers.
Smart Images
Figure CN122298252A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of air mixing technology, and in particular to a mixer and an air mixing box. Background Technology
[0002] Currently, air mixing boxes are widely used in heat exchange fields such as air conditioning and ventilation systems, precision measurement systems, and high-precision temperature control equipment systems.
[0003] Because the airflow within the mixing chamber is complex, the air outlet temperature is uneven after passing through the heat exchange equipment. Therefore, a mixer is typically installed before the outlet to ensure the required uniformity of the air outlet temperature. Currently, mixers mainly employ active mixing, static mixing, and long-channel mixing methods. Since passive mixing has no moving parts, it is simple to maintain and reliable in operation, and is widely used. However, static mixing structures generally have low mixing efficiency, and achieving high outlet temperature uniformity usually results in a significant pressure drop, greatly increasing the pumping power of the system fan. Mixing methods with longer channels have smaller pressure drops, but lower mixing efficiency. To achieve high outlet temperature uniformity, longer channels are required, which is usually not feasible for units with fixed external dimensions. Summary of the Invention
[0004] The purpose of this application is to provide a mixer and an air mixing box to solve the technical problems of low mixing efficiency and large pressure drop in the prior art.
[0005] To achieve the above objectives, this application provides a mixer, including a housing, which has a mixing chamber, an inlet, and an outlet. The mixing chamber has a mixing structure inside, which includes a guide channel and a bypass channel. One end of the guide channel is connected to the inlet, and the other end extends to the bottom of the mixing chamber. The two ends of the bypass channel are connected to the guide channel and the outlet, respectively, so that the fluid medium flowing into the mixing chamber from the inlet is guided to the bottom of the mixing chamber through the guide channel and flows upward through the bypass channel and out of the mixing chamber from the outlet.
[0006] In some embodiments, the mixing structure includes a guide plate and a flow-around plate. The guide plate surrounds a flow-guiding channel extending toward the bottom of the mixing cavity. The mixing cavity outside the guide plate is divided into a continuous flow-around channel by the flow-around plate, so that the fluid medium flows out of the mixing cavity from the outlet after continuously changing direction through the flow-around channel.
[0007] In some embodiments, a flow-around plate is disposed in a mixing cavity surrounding a flow guide plate, and the flow-around plate extends spirally from the bottom of the mixing cavity to the top of the mixing cavity to form a spiral flow-around channel.
[0008] In some embodiments, the guide vane is cylindrical, and the cylindrical guide vane and the spiral flow plate are coaxially arranged, with the flow plate disposed between the outer wall of the guide vane and the inner wall of the housing with equal pitch.
[0009] In some embodiments, the inlet and outlet are located on opposite sides of the housing, and the orientation of the inlet and outlet is perpendicular to the axial direction of the guide plate.
[0010] In some embodiments, the guide plate includes a first guide plate, a second guide plate, and a third guide plate, which are connected sequentially to form a guide plate with a bottom opening, and the inner diameter of the guide plate gradually decreases along the flow direction of the flow channel.
[0011] In some embodiments, the flow guide plate includes a first folding plate and a second folding plate. The first folding plate is located below the second folding plate, is connected to the first guide plate, and is located outside the flow guide plate. The second folding plate is connected to the connection between the second guide plate and the third guide plate and is located outside the flow guide plate. The second folding plate and the flow guide plate together form an upwardly facing flow outlet, so that the fluid medium discharged from the flow guide plate flows from the flow outlet to the flow outlet after passing around the first folding plate and the second folding plate in sequence.
[0012] In some embodiments, the third guide plate is provided with a plurality of holes, which are used to divert the fluid medium and cause the diverted fluid medium to disperse the vortex formed on the outside of the guide plate.
[0013] This application also provides an air mixing chamber, including the mixer of any of the above.
[0014] In some embodiments, the air mixing chamber further includes a fan and a heater, with the heater disposed between the fan and the chamber. The fan is equipped with a flow rectifier plate and a heat exchanger. The fan is used to provide power so that the fluid medium flows into the chamber after passing through the flow rectifier plate, the heat exchanger and the heater in sequence.
[0015] Compared with the above background technology, the mixer provided in the embodiments of this application includes a housing, the housing is provided with a mixing cavity, an inlet and an outlet, and further, the mixing cavity is provided with a mixing structure, the mixing structure includes a guide channel and a bypass channel.
[0016] One end of the flow guide channel is connected to the inlet, and the other end extends to the bottom of the mixing chamber. The two ends of the flow bypass channel are connected to the flow guide channel and the outlet, respectively, so that the fluid medium flowing into the mixing chamber from the inlet is guided to the bottom of the mixing chamber through the flow guide channel, and flows upward through the flow bypass channel and out of the mixing chamber from the outlet.
[0017] It can be seen that after the unevenly mixed fluid medium flows into the mixing chamber of the box through the inlet, it can flow directly to the bottom of the mixing chamber along the guide channel, then flow upward through the bypass channel, and finally flow out of the mixing chamber from the outlet.
[0018] The beneficial effects of such a mixer configuration include at least the following:
[0019] This configuration fully utilizes the space of the mixing chamber inside the housing. Through the construction of the mixing structure, mainly using guide channels and bypass channels, the unevenly mixed fluid medium can be fully mixed in the mixing chamber inside the housing. Compared with the traditional mixing method with a longer flow channel, it can also reduce the pressure drop. Thus, this mixer can improve the mixing efficiency of the fluid medium and reduce the pressure drop during the mixing process without increasing the unit volume. It solves the problem that current mixers cannot simultaneously improve mixing efficiency, increase unit compactness, and reduce pressure drop. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a mixer according to this application;
[0022] Figure 2 for Figure 1 A schematic diagram of the internal structure of the mixer shown;
[0023] Figure 3 for Figure 1 The cross-sectional view of the mixer shown;
[0024] Figure 4 for Figure 1 A schematic diagram of a partially cut-open mixer shown;
[0025] Figure 5 This is an exploded view of another type of mixer in this application;
[0026] Figure 6 for Figure 5 Another angle view of the mixing structure of the mixer shown;
[0027] Figure 7 This is a cross-sectional view of the air mixing chamber in this application;
[0028] Figure 8 This is an exploded view of the air mixing chamber in this application;
[0029] Figure 9 This is an exploded view of the air mixing chamber in this application from another angle;
[0030] Figure 10 This is a schematic diagram showing the flow direction of the fluid medium in the air mixing chamber of this application;
[0031] Figure 11 This is a schematic diagram of the overall structure of the air mixing chamber in this application.
[0032] in:
[0033] 10 - Mixer;
[0034] 11-Box body, 111-Mixing chamber, 112-Inlet, 113-Outlet;
[0035] 12-Mixed flow structure, 121-Guide channel, 122-Flow bypass channel, 123-Guide plate, 1231-First guide plate, 1232-Second guide plate, 1233-Third guide plate, 12331-Orifice, 124-Flow bypass plate, 1241-First folding plate, 1242-Second folding plate;
[0036] 20- Fan;
[0037] 30 - Heater;
[0038] 40 - Rectifier orifice plate;
[0039] 50 - Heat exchanger. Detailed Implementation
[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0041] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] The mixer 10 provided in this application embodiment includes a housing 11, which is provided with a mixing chamber 111, an inlet 112 and an outlet 113.
[0043] Furthermore, the mixing cavity 111 is provided with a mixing structure 12 inside, which includes a flow guiding channel 121 and a flow bypass channel 122.
[0044] One end of the flow guiding channel 121 is connected to the inlet 112, and the other end of the flow guiding channel 121 extends to the bottom of the mixing chamber 111. The two ends of the flow bypass channel 122 are connected to the flow guiding channel 121 and the outlet 113, respectively. In this way, the fluid medium flowing into the mixing chamber 111 from the inlet 112 is guided to the bottom of the mixing chamber 111 through the flow guiding channel 121, and flows upward around the flow bypass channel 122 and flows out of the mixing chamber 111 from the outlet 113.
[0045] It can be seen that after the unevenly mixed fluid medium flows into the mixing chamber 111 of the box 11 through the inlet 112, it can flow directly along the guide channel 121 to the bottom of the mixing chamber 111, then flow upward through the bypass channel 122, and finally flow out of the mixing chamber 111 from the outlet 113.
[0046] This configuration fully utilizes the space of the mixing chamber 111 inside the housing 11. Through the construction of the mixing structure 12, mainly using the guide channel 121 and the bypass channel 122, the unevenly mixed fluid medium can be fully mixed in the mixing chamber 111 inside the housing 11. Compared with the traditional mixing method with a longer flow channel, it can also reduce the pressure drop. Thus, the mixer 10 can improve the mixing efficiency of the fluid medium and reduce the pressure drop during the mixing process without increasing the unit volume. This solves the problem that the current mixer 10 cannot simultaneously improve the mixing efficiency, increase the unit compactness, and reduce the pressure drop.
[0047] Furthermore, the mixing structure 12 includes a guide plate 123 and a flow-around plate 124. The guide plate 123 surrounds and forms a flow-guiding channel 121 extending toward the bottom of the mixing cavity 111. The mixing cavity 111 outside the guide plate 123 is divided into a continuous flow-around channel 122 by the flow-around plate 124, so that the fluid medium continuously changes direction through the flow-around channel 122 and flows out of the mixing cavity 111 from the outlet 113.
[0048] With this configuration, the non-uniform fluid medium flows into the mixing chamber 111 of the housing 11 from the inlet 112, and can flow directly to the bottom of the mixing chamber 111 along the guide channel 121. After that, it flows out of the mixing chamber 111 from the outlet 113 after continuously changing direction through the bypass channel 122.
[0049] As can be seen, when the non-uniform fluid medium develops freely in the flow channel 122, the flow direction of the fluid medium is continuously changed by the structure of the flow channel 122, further accelerating the mixing of the fluid medium. Compared with the structure of various traditional static mixers, simulation verification shows that this type of flow-around mixing method can achieve higher uniformity and reduce the system pressure drop by more than 50%.
[0050] In some embodiments, the main body of the mixer 10 is cylindrical, the flow channel 121 is located at the center of the main body of the mixer 10, and the flow channel 122 is arranged around the periphery of the flow channel 121.
[0051] Please see Figures 1-4 The guide plate 123 is cylindrical, and the flow-around plate 124 is disposed in the mixing cavity 111 around the guide plate 123. The flow-around plate 124 extends spirally from the bottom of the mixing cavity 111 to the top of the mixing cavity 111 to form a spiral flow-around channel 122, which has the function of turbulence.
[0052] In other words, the periphery of the flow guide channel 121 is divided into multiple flow channels 122 by a spiral flow plate 124. The number of flow channels 122 can be flexibly set according to the unit size requirements and the outlet temperature uniformity requirements. By increasing the number of flow channels 122 to a certain extent, the flow development length of the fluid medium can be effectively increased, thereby increasing the uniformity of the outlet.
[0053] Furthermore, the cylindrical guide plate 123 and the spiral flow plate 124 are coaxially arranged, and the flow plate 124 is arranged between the outer wall of the guide plate 123 and the inner wall of the box 11 with equal pitch.
[0054] It should be noted that the pitch is the distance between adjacent flow plates 124 in the longitudinal direction. By constructing the flow plates 124 with equal pitch, the mixing range of the fluid medium in the spiral flow channel 122 can be increased, so that the fluid medium is mixed evenly.
[0055] Of course, the pitch of the flow guide plate 124 can also be gradually increased or decreased in the direction closer to the outlet 113. For example, gradually increasing the pitch of the flow guide plate 124 in the direction closer to the outlet 113 can reduce the flow resistance of the fluid medium when passing through the remaining flow channel 122 and reduce the energy loss of the fluid medium.
[0056] Based on the above, the inlet 112 and outlet 113 are located on two opposite sides of the cylindrical housing 11, and the orientation of the inlet 112 and outlet 113 is perpendicular to the axial direction of the guide plate 123. That is to say, when the fluid medium enters and leaves the housing 11, its flow direction is perpendicular to the axial direction of the guide plate 123.
[0057] Understandably, the inlet 112 and outlet 113 are located on opposite sides of the cylindrical box 11, which allows for more efficient use of the internal space of the box 11 to design the flow guide channel 121 and the flow bypass channel 122, thereby improving the utilization rate of the internal space of the box 11. When the fluid medium enters and leaves the box 11, its flow direction is perpendicular to the axial direction of the guide plate 123, which helps to break the laminar flow state of the fluid medium and promote the formation of turbulence, thereby enhancing the mixing effect of the fluid medium in the mixing chamber 111. Furthermore, it can generate vortices when the fluid medium enters and leaves the box 11, and these vortices help to improve the mixing efficiency.
[0058] The cross-sectional dimensions of the inlet 112, outlet 113 and bypass channel 122 of the mixer 10 can be determined according to the air volume of the applicable unit. In order to avoid large pressure loss caused by the mixing box, it is recommended to control the cross-sectional wind speed at about 10m / s during the design.
[0059] The mixer 10 of the above embodiment has low air resistance for fluid medium flow and the mixing efficiency can meet the requirements of the unit.
[0060] In some embodiments, the main body shape of the mixer 10 can be designed as a rectangle or other shapes in combination with the specific unit shape, provided that the fluid medium can flow to the bottom first and then flow around to the outlet, so as to achieve better mixing.
[0061] Please see Figures 5-10 The guide plate 123 includes a first guide plate 1231, a second guide plate 1232 and a third guide plate 1233. The first guide plate 1231, the second guide plate 1232 and the third guide plate 1233 are connected in sequence to form a guide plate 123 with an open bottom. The inner diameter of the guide plate 123 gradually decreases along the flow direction of the flow channel 121.
[0062] As can be seen, the first guide plate 1231, the second guide plate 1232, and the third guide plate 1233 are connected in sequence to form a funnel-shaped guide plate 123 with three walls and one opening. The opening is the guide outlet, which is located at the bottom of the guide plate 123. The fluid medium flows through the three walls of the guide plate 123 (the inner walls of the first guide plate 1231, the second guide plate 1232, and the third guide plate 1233 connected in sequence) to the bottom of the mixing chamber 111, and then flows out of the guide plate 123 through the guide outlet.
[0063] The flow guide plate 124 includes a first folding plate 1241 and a second folding plate 1242. The first folding plate 1241 is located below the second folding plate 1242. The first folding plate 1241 is connected to the first guide plate 1231 and is located outside the flow guide plate 123 (or as shown). Figure 6(As shown on the rear side), the second folding plate 1242 is connected to the connection between the second guide plate 1232 and the third guide plate 1233, and is located outside the guide plate 123. The second folding plate 1242 and the guide plate 123 together form an upward-facing flow outlet, so that the fluid medium led out by the guide plate 123 flows around the first folding plate 1241 and the second folding plate 1242 in sequence and then flows from the flow outlet to the flow outlet 113.
[0064] It is understandable that the fluid medium flowing out of the guide plate 123 from the guide outlet first passes through the first baffle 1241 and then flows around, so that the fluid medium flows to the second baffle 1242, passes through the second baffle 1242 and then flows around, then enters the internal space (i.e., the flow outlet) formed by the second baffle 1242 and the guide plate 123, and finally flows to the outlet 113 and flows out of the box 11.
[0065] Of course, depending on the flow requirements, both the first fold plate 1241 and the second fold plate 1242 can be set as a plate formed by combining two triangular plates, and the angle between the two triangular plates can be a right angle.
[0066] Furthermore, the third guide plate 1233 is provided with a number of holes 12331, which are used to divert the fluid medium and cause the diverted fluid medium to disperse the vortex formed on the outside of the guide plate 123.
[0067] In this way, by designing an opening at the edge of the third guide plate 1233, the fluid diverted from the opening disperses the vortex formed on the outside of the guide plate 123 due to the high-speed airflow adjusting its direction, further reducing the pressure drop while increasing the mixing effect.
[0068] As can be seen, the method of extending some baffles at the asymmetrical center of the box 11 in this embodiment can also achieve the effect of flow mixing, with higher space utilization and more suitable for manufacturing and installation.
[0069] In summary, the mixer 10 provided in this application, within a limited volume, greatly increases the airflow length by rationally arranging the flow channels to guide the airflow around the flow. Through the diffusion effect of air in free flow development, a high degree of uniformity of mixing is achieved. Furthermore, since the use of various flow disturbance devices with small porosity is avoided, the pressure drop of the entire mixer 10 on the fluid medium is small. At the same time, it has a compact structure, no power components, is easy to manufacture, and has high reliability. Thus, it solves the problem that current mixers cannot simultaneously improve mixing efficiency, increase unit compactness, and reduce pressure drop.
[0070] Please see Figures 7-11 The air mixing chamber provided in this application includes the mixer 10 described in the above specific embodiments.
[0071] In addition, the air mixing box also includes a fan 20 and a heater 30. The heater 30 is located between the fan 20 and the box 11. The fan 20 is equipped with a flow rectifier plate 40 and a heat exchanger 50. The fan 20 is used to provide power so that the fluid medium flows through the flow rectifier plate 40, the heat exchanger 50 and the heater 30 in sequence before flowing into the box 11.
[0072] In the aforementioned air mixing chamber, when the fluid medium is drawn in through the inlet of the fan 20, it flows successively through the rectifier plate 40, the heat exchanger 50 and the heater 30 before flowing into the chamber 11. Then, it is guided by the flow channel 121 inside the chamber 11 and flows around the flow channel 122 before flowing out through the outlet at the top of the chamber 11, achieving the goal of a cross-sectional temperature difference of less than 0.03K at the outlet.
[0073] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0074] The mixer and air mixing box provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.
Claims
1. A mixer (10), characterized in that, The device includes a housing (11), which has a mixing chamber (111), an inlet (112), and an outlet (113). The mixing chamber (111) has a mixing structure (12) inside. The mixing structure (12) includes a guide channel (121) and a bypass channel (122). One end of the guide channel (121) is connected to the inlet (112), and the other end extends to the bottom of the mixing chamber (111). The two ends of the bypass channel (122) are connected to the guide channel (121) and the outlet (113), respectively. The fluid medium flowing into the mixing chamber (111) from the inlet (112) is guided to the bottom of the mixing chamber (111) through the guide channel (121) and flows upward through the bypass channel (122) and out of the mixing chamber (111) from the outlet (113).
2. The mixer (10) as described in claim 1, characterized in that, The mixing structure (12) includes a guide plate (123) and a flow-around plate (124). The guide plate (123) surrounds and forms the flow-guide channel (121) extending toward the bottom of the mixing cavity (111). The mixing cavity (111) outside the guide plate (123) is divided into a continuous flow-around channel (122) by the flow-around plate (124), so that the fluid medium continuously changes direction through the flow-around channel (122) and flows out of the mixing cavity (111) from the outlet (113).
3. The mixer (10) as described in claim 2, characterized in that, The flow-around plate (124) is disposed in the mixing cavity (111) around the flow guide plate (123). The flow-around plate (124) extends spirally from the bottom of the mixing cavity (111) to the top of the mixing cavity (111) to form the spiral flow-around channel (122).
4. The mixer (10) as described in claim 3, characterized in that, The guide plate (123) is cylindrical, and the cylindrical guide plate (123) and the spiral flow plate (124) are coaxially arranged, and the flow plate (124) is arranged between the outer wall of the guide plate (123) and the inner wall of the box (11) with equal pitch.
5. The mixer (10) as described in claim 4, characterized in that, The inlet (112) and the outlet (113) are located on opposite sides of the housing (11), and the orientation of the inlet (112) and the outlet (113) is perpendicular to the axis of the guide plate (123).
6. The mixer (10) as described in claim 2, characterized in that, The guide plate (123) includes a first guide plate (1231), a second guide plate (1232) and a third guide plate (1233), which are connected in sequence to form the guide plate (123) with a bottom opening, and the inner diameter of the guide plate (123) gradually decreases along the flow direction of the flow channel (121).
7. The mixer (10) as claimed in claim 6, characterized in that, The flow-around plate (124) includes a first folding plate (1241) and a second folding plate (1242). The first folding plate (1241) is located below the second folding plate (1242). The first folding plate (1241) is connected to the first guide plate (1231) and is located outside the flow-around plate (123). The second folding plate (1242) is connected to the connection between the second guide plate (1232) and the third guide plate (1233) and is located outside the flow-around plate (123). The second folding plate (1242) and the flow-around plate (123) together form an upward-facing flow-around outlet, so that the fluid medium exported by the flow-around plate (123) flows from the flow-around outlet to the flow outlet (113) after passing around the first folding plate (1241) and the second folding plate (1242) in sequence.
8. The mixer (10) as claimed in claim 7, characterized in that, The third guide plate (1233) is provided with a plurality of holes (12331), which are used to divert the fluid medium and cause the diverted fluid medium to disperse the vortex formed on the outside of the guide plate (123).
9. An air mixing chamber, characterized in that, Includes the mixer (10) as described in any one of claims 1-8.
10. The air mixing chamber as described in claim 9, characterized in that, The air mixing box also includes a fan (20) and a heater (30). The heater (30) is located between the fan (20) and the box body (11). The fan (20) is provided with a flow rectifier plate (40) and a heat exchanger (50). The fan (20) is used to provide power so that the fluid medium flows into the box body (11) after passing through the flow rectifier plate (40), the heat exchanger (50) and the heater (30) in sequence.