Air outlet device and air conditioner

Abstract

This invention provides an air outlet device and an air conditioner. The air outlet device includes a main assembly, an upper centrifugal fan, and a lower centrifugal fan. The main assembly includes an upper air outlet and a lower air outlet, and forms a first channel and a second channel. The upper centrifugal fan includes a first upper air outlet and a first lower air outlet. The lower centrifugal fan includes a second upper air outlet and a second lower air outlet. The upper and lower centrifugal fans are arranged vertically within the main assembly. The first upper air outlet communicates with the upper air outlet, and the second upper air outlet communicates with the upper air outlet through the first channel. The second lower air outlet communicates with the lower air outlet, and the first lower air outlet communicates with the lower air outlet through the second channel. The centrifugal fan has a turning position, and a guide surface is provided on the outer side of the turning position. The guide surface forms an angle with the normal plane of the centrifugal fan's axis. The air conditioner includes the above-described air outlet device. This invention can reduce local losses caused by airflow turning and increase the air volume.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to a dual centrifugal dual air supply air outlet device and an air conditioner. Background Technology

[0002] A cabinet air conditioner's air outlet device includes a main assembly and two single-suction centrifugal fans—an upper centrifugal fan and a lower centrifugal fan—installed within the main assembly. The upper and lower centrifugal fans are arranged vertically and their axes are parallel to each other. A heat exchanger is installed between the air inlet of the air conditioner and the air inlets of the two centrifugal fans. The main assembly includes an upper air outlet and a lower air outlet at its upper and lower ends. Each of the upper and lower centrifugal fans has its own upper and lower air outlets on its outer periphery. The main assembly also forms a first channel and a second channel, which are located on the axial front side of the two centrifugal fans. The upper air outlet of the upper centrifugal fan is connected to the upper air outlet, the upper air outlet of the lower centrifugal fan is connected to the upper air outlet through the first channel, the lower air outlet of the lower centrifugal fan is connected to the lower air outlet, and the lower air outlet of the upper centrifugal fan is connected to the lower air outlet through the second channel.

[0003] However, because the first and second channels are arranged axially with the centrifugal fan, the air ducts are arranged in a three-dimensional, intersecting manner with many bends, resulting in local airflow loss and affecting the air delivery volume. Summary of the Invention

[0004] The primary objective of this invention is to provide a duct device for increasing airflow.

[0005] The second objective of this invention is to provide an air conditioner that increases air volume.

[0006] The air outlet device provided by the first objective of this invention includes a main body assembly, an upper centrifugal fan, and a lower centrifugal fan. The main body assembly includes an upper air outlet and a lower air outlet, and the main body assembly forms a first channel and a second channel. The upper centrifugal fan includes a first upper air outlet and a first lower air outlet. The lower centrifugal fan includes a second upper air outlet and a second lower air outlet. The upper and lower centrifugal fans are arranged vertically within the main body assembly. The first upper air outlet is connected to the upper air outlet, and the second upper air outlet is connected to the upper air outlet through the first channel. The second lower air outlet is connected to the lower air outlet, and the first lower air outlet is connected to the lower air outlet through the second channel. At least one of the upper and lower centrifugal fans has a turning position located between its own air inlet and its own air outlet. A guide surface is provided on the outer side of the turning position, and the guide surface forms an inclined angle with the normal plane of the axis of the centrifugal fan.

[0007] A further embodiment includes at least one of the following: the air inlet of the upper centrifugal fan is a first air inlet, and the upper centrifugal fan has a first guide surface located between the first air inlet and the first lower air outlet, the first guide surface forming a first inclination angle with the normal plane of the axis of the upper centrifugal fan, the first inclination angle being set within a range of 40 degrees to 50 degrees; the air inlet of the lower centrifugal fan is a second air inlet, and the lower centrifugal fan has a second guide surface located between the second air inlet and the second upper air outlet, the second guide surface forming a second inclination angle with the normal plane of the axis of the lower centrifugal fan, the second inclination angle being set within a range of 15 degrees to 25 degrees; the air inlet of the lower centrifugal fan is a second air inlet, and the lower centrifugal fan has a third guide surface located between the second air inlet and the second upper air outlet, the third guide surface forming a third inclination angle with the normal plane of the axis of the lower centrifugal fan, the third inclination angle being set within a range of 20 degrees to 30 degrees.

[0008] As can be seen from the above scheme, setting a guide surface on the outside of the turning position of the centrifugal fan towards the axial direction guides the airflow to turn. In particular, in a better scheme, optimizing the setting range of the tilt angle of one turning position of the upper centrifugal fan and the tilt angle of the upper and lower turning positions of the lower centrifugal fan can reduce the local loss caused by the airflow turning and increase the air volume.

[0009] A further embodiment includes at least one of the following: the upper centrifugal fan includes a first wall panel and a second wall panel connected at a first inclined angle, a first air inlet is disposed on the first wall panel, and a first guide surface is disposed on the second wall panel; the lower centrifugal fan includes a third wall panel, a second air inlet is disposed on the third wall panel, and the lower centrifugal fan also includes a fourth wall panel, a second guide surface is disposed on the fourth wall panel, and the fourth wall panel is connected to the third wall panel at a second inclined angle; the lower centrifugal fan includes a third wall panel, a second air inlet is disposed on the third wall panel, and the lower centrifugal fan also includes a fifth wall panel, a third guide surface is disposed on the fifth wall panel, and the fifth wall panel is connected to the third wall panel at a third inclined angle.

[0010] As can be seen from the above, under this configuration, the desired tilt angle of the guide surface at the turning position can be formed by simply bending the volute wall plate, thus reducing the difficulty of production.

[0011] Another further option is that the first channel is provided with an upper channel outlet, which includes a first part and a second part; on the cross-section of the upper channel outlet, the first part and the first upper air outlet are arranged sequentially along the axial direction of the upper centrifugal fan, and the second part and the first upper air outlet are arranged sequentially along the radial direction of the upper centrifugal fan.

[0012] A further embodiment is that the upper centrifugal fan includes a first volute, the first volute includes a first upper air outlet, and the first upper air outlet is the outlet of the first upper air outlet; within the main body assembly, in the radial direction, a side space is formed on one side of the first upper air outlet; a portion of the first channel is disposed in the side space, and a second portion is opposite to the side space.

[0013] As can be seen from the above, in the past, the upper channel outlet of the first channel was set in a roughly rectangular shape and arranged parallel to the rectangular first upper air outlet along the axial direction. However, in reality, since the first upper air outlet is set off to the side on the volute of the upper centrifugal fan, there is still an unused position on the lateral side of the first upper air outlet (i.e., the aforementioned side space). The present invention utilizes this side space to increase the end section of the first channel and form a second section, which significantly reduces the flow resistance of the upper air outlet of the lower fan and increases the air volume.

[0014] Another further embodiment is that the lower centrifugal fan includes a second volute, the second volute includes a second lower air outlet, and the second lower air outlet is the outlet of the second lower air outlet; the second lower air outlet is also provided with a premixing inlet connecting its inner and outer sides, and at least a portion of the second channel outlet is connected to the premixing inlet.

[0015] As can be seen above, the lengths and flow cross-sections of the air outlet ducts of the upper and lower centrifugal fans are different, and the flow resistance of each branch is also different. Specifically, the flow resistance of the first lower air outlet duct of the upper centrifugal fan is significantly greater than that of the second lower air outlet duct of the lower centrifugal fan, and the overall pipe resistance of the air outlet system is not at its lowest point. Adding a premixing inlet can balance the airflow of each fan branch. Specifically, the premixing inlet is located in the second lower air outlet duct of the lower centrifugal fan. This allows a portion of the airflow from the upper centrifugal fan flowing downwards through the second channel to be introduced into the second lower air outlet duct of the lower centrifugal fan. This significantly reduces the flow resistance of the airflow from the upper centrifugal fan while sacrificing a small amount of airflow from the lower fan, thus reducing the overall flow resistance of the fan system and further increasing the airflow.

[0016] A further proposed solution is that the second channel has a first lower channel outlet and a second lower channel outlet. The first lower channel outlet is connected to the lower air supply outlet, and the second lower channel outlet is connected to the premix inlet. The area ratio of the first channel outlet, the second lower air supply outlet, and the premix inlet is 2:2:1.

[0017] As can be seen from the above, with this area ratio setting, the simulated air volume at the same rotation speed is further improved.

[0018] Another further option is to set the premix inlet opposite to the turning point of the lower centrifugal fan.

[0019] Another further option includes at least one of the following: in the height direction of the air outlet device, the first distance between the axis of the upper centrifugal fan and the axis of the lower centrifugal fan is set within the range of 500mm to 540mm; in the height direction of the air outlet device, the second distance between the first upper air outlet and the second lower air outlet is less than 1100mm.

[0020] As can be seen from the above, this layout makes the air duct structure compact, reduces the length of the air duct with high friction loss, and increases the air volume.

[0021] Another further option is that the main component also includes a partition, which is set between the upper centrifugal fan and the lower centrifugal fan. The internal space of the main component is divided into a first channel and a second channel by the partition.

[0022] A further proposed solution is to set the third distance between the partition and the axis of the upper centrifugal fan in the vertical direction within the range of 230mm to 260mm.

[0023] As can be seen from the above, the position of the baffle determines the spatial ratio between the first channel and the second channel, and this setting is more conducive to balancing the flow resistance between the first channel and the second channel.

[0024] A further option is to install an opening and closing mechanism in at least one air outlet duct of the upper centrifugal fan and / or the lower centrifugal fan.

[0025] As can be seen from the above, installing baffles, such as controllable swing baffles, inside the air duct of a centrifugal fan can enable various different air outlet modes of the air conditioner.

[0026] A further proposed solution is that the upper centrifugal fan includes a first upper air outlet duct and a first lower air outlet duct, with the outlet of the first upper air outlet duct being the first upper air outlet and the outlet of the first lower air outlet duct being the first lower air outlet; the lower centrifugal fan includes a second upper air outlet duct and a second lower air outlet duct, with the outlet of the second upper air outlet duct being the second upper air outlet and the outlet of the second lower air outlet duct being the second lower air outlet; and the first upper air outlet duct, the first lower air outlet duct, the second upper air outlet duct, and the second lower air outlet duct are all equipped with opening and closing mechanisms.

[0027] As can be seen from the above, under this setting, by controlling multiple opening and closing mechanisms to form a specific combination of opening and closing states, both the upward air outlet mode and the downward air outlet mode can be achieved.

[0028] The second objective of this invention is to provide an air conditioner that includes the aforementioned air outlet device. Attached Figure Description

[0029] Figure 1 This is a structural diagram showing the air conditioner of the present invention after the front cover and the wind deflector have been removed.

[0030] Figure 2 This is a front view of an embodiment of the air conditioner of the present invention after the front cover and wind deflector have been removed.

[0031] Figure 3 This is an exploded view of the airflow channels of the air duct device in an embodiment of the air conditioner of the present invention.

[0032] Figure 4 This is a front view of the wind deflector in an embodiment of the air conditioner of the present invention.

[0033] Figure 5 This is a rear view of the wind deflector in an embodiment of the air conditioner of the present invention.

[0034] Figure 6 This is a horizontal schematic diagram of the internal airflow channel of the centrifugal fan in an embodiment of the air conditioner of the present invention.

[0035] Figure 7 This is a horizontal schematic diagram of the internal airflow channel of the centrifugal fan in an embodiment of the air conditioner of the present invention.

[0036] Figure 8 This is a cross-sectional view of the upper channel outlet and the first upper air outlet in the existing technology.

[0037] Figure 9 This is a cross-sectional view of the upper channel outlet and the first upper air outlet in an embodiment of the air conditioner of the present invention.

[0038] Figure 10 This is an airflow path diagram in the dual-air supply mode of an embodiment of the air conditioner of the present invention.

[0039] Figure 11 This is a schematic diagram illustrating the installation of a wind deflector in an embodiment of the air conditioner of the present invention.

[0040] Figure 12 This is a partial schematic diagram of a baffle plate blocking the air outlet duct of the volute in an embodiment of the air conditioner of the present invention.

[0041] Figure 13 This is a partial schematic diagram of the air deflector opening the air outlet duct of the volute in an embodiment of the air conditioner of the present invention.

[0042] Figure 14 This is a schematic diagram of the baffle state in the air outlet mode of an embodiment of the air conditioner of the present invention.

[0043] Figure 15 This is an airflow path diagram in the air outlet mode of an embodiment of the air conditioner of the present invention.

[0044] Figure 16 This is a schematic diagram of the baffle state in the air outlet mode of an embodiment of the air conditioner of the present invention.

[0045] Figure 17 This is an airflow path diagram in the air outlet mode of an embodiment of the air conditioner of the present invention.

[0046] Figure 18This is a partial velocity vector diagram of the premixed inlet from a first-view perspective of an embodiment of the air conditioner of the present invention.

[0047] Figure 19 This is a partial velocity vector diagram of the premixed inlet from a second perspective of an embodiment of the air conditioner of the present invention. Detailed Implementation

[0048] Air outlet device and air conditioner embodiment See Figures 1 to 3 ,in, Figure 3 Apart from heat exchanger 3, which represents a solid structure, all other parts are spatial diagrams. The locations of these spaces are shown to more clearly illustrate their positions. Figure 3 Mark the corresponding entity structure in space.

[0049] The air conditioner in this embodiment includes a cabinet unit, which comprises a main body assembly 1, an upper centrifugal fan 21, and a lower centrifugal fan 22. The main body assembly 1 includes an outer shell assembly 11, a partition 17, and a baffle plate 19. The interior of the outer shell assembly 11 forms an installation space and spaces for forming various air ducts. The main air inlet of the cabinet unit is located at the back of the outer shell assembly 11, while the front of the outer shell assembly 11 is open. See also... Figure 1 , Figure 4 and Figure 5 The front 1901 and back 1902 of the wind deflector 19 are opposite each other to form a plate shape, and the lateral sides of the wind deflector 19 can be connected to the outer shell assembly 11 in a relatively sealed manner.

[0050] The upper centrifugal fan 21, the lower centrifugal fan 22, and the partition 17 are all installed inside the outer casing assembly 11. The upper centrifugal fan 21 and the lower centrifugal fan 22 are arranged vertically, and the axes of the two centrifugal fans extend along the front-back direction of the air outlet device (i.e., the front-back direction of the air conditioner cabinet unit). The partition 17 is disposed between the upper centrifugal fan 21 and the lower centrifugal fan 22. The baffle 19 blocks the opening on the front side of the outer casing assembly 11. The interior formed by the baffle 19 and the outer casing assembly 11 forms the first channel 23 and the second channel 24 of the present invention between the upper centrifugal fan 21, the lower centrifugal fan 22, and the partition 17. The internal space of the main body assembly 1 forms the first channel 23 and the second channel 24 under the separation of the partition 17.

[0051] In addition, the air conditioner also includes a heat exchanger 3, which is disposed inside the outer casing assembly 11 and located between the rear air inlet and the two centrifugal fans. An air inlet cavity 1001 is formed inside the main body assembly 1 between the rear air inlet and the heat exchanger 3. A fan air inlet cavity 1002 is formed inside the main body assembly 1 between the heat exchanger 3 and the upper centrifugal fan 21 and the lower centrifugal fan 22. The air inlets of the upper centrifugal fan 21 and the lower centrifugal fan 22 are both positioned towards the rear of the air outlet device and directly opposite the fan air inlet cavity 1002.

[0052] In addition, the main component 1 includes an upper air outlet 108 and a lower air outlet 109 located on the upper and lower sides of the air supply device, respectively. Thus, the airflow enters the interior from the back of the air conditioner, is heated by the heat exchanger 3, and is then sent to the upper centrifugal fan 21 and the lower centrifugal fan 22, and finally discharged through the upper air outlet 108 and / or the lower air outlet 109.

[0053] The upper centrifugal fan 21 includes a first upper air outlet 211 and a first lower air outlet 212. The upper centrifugal fan 21 includes a first volute, which includes a first upper air outlet duct 218 and a first lower air outlet duct 219. The first upper air outlet 211 is the outlet of the first upper air outlet duct 218, and the first lower air outlet 212 is the outlet of the first lower air outlet duct 219.

[0054] The lower centrifugal fan 22 includes a second upper air outlet 221 and a second lower air outlet 222. The lower centrifugal fan 22 includes a second volute, which includes a second upper air outlet 228 and a second lower air outlet 229. The second upper air outlet 221 is the outlet of the second upper air outlet 228, and the second lower air outlet 222 is the outlet of the second lower air outlet 229.

[0055] Combination Figure 10 The first upper air outlet 211 is connected to the upper air supply outlet 108, the second upper air outlet 221 is connected to the upper air supply outlet 108 through the first channel 23, the second lower air outlet 222 is connected to the lower air supply outlet 109, and the first lower air outlet 212 is connected to the lower air supply outlet 109 through the second channel 24. Thus, when the air conditioner is working, air enters from the rear air inlet 107, passes through the heat exchanger, and then enters the upper centrifugal fan 21 through the first air inlet 213 and the upper centrifugal fan 21 through the second air inlet 223. The lower centrifugal fan 22 then delivers a portion of the airflow from the upper centrifugal fan 21 to the upper air outlet 108 via the first upper air outlet 211, while the other portion of the airflow passes through the first lower air outlet 212 and the second channel 24 to the lower air outlet 109. A portion of the airflow from the lower centrifugal fan 22 is delivered to the upper air outlet 108 via the second upper air outlet 221 and the first channel 23, while the other portion of the airflow passes through the second lower air outlet 222 to the lower air outlet 109, thus achieving dual airflow from both the upper and lower parts.

[0056] See Figure 2First, in the height direction of the air outlet device (i.e., the height direction of the air conditioner), the first distance D between the first axis 210 of the upper centrifugal fan 21 and the second axis 220 of the lower centrifugal fan 22 is set within the range of 500mm to 540mm. In this embodiment, the first distance D is 520mm. Then, in the height direction of the air outlet device, the second distance L between the first upper air outlet 211 and the second lower air outlet 222 is less than 1100mm. In this embodiment, the second distance L is 1060mm. Furthermore, in the height direction of the air outlet device, the third distance d between the baffle 17 and the axis of the upper centrifugal fan 21 is set within the range of 230mm to 260mm. In this embodiment, the third distance d is 245mm. The position of the baffle 17 determines the spatial ratio of the first channel 23 and the second channel 24. This layout makes the duct structure compact, reduces the length of the duct with high friction loss, increases the air volume, and the optimized position of the baffle 17 is more conducive to balancing the flow resistance between the first channel 23 and the second channel 24.

[0057] Both the upper centrifugal fan 21 and the lower centrifugal fan 22 have a turning point located between their respective air inlets and outlets. A guide surface is provided on the outer side of the turning point, and this guide surface forms an angle with the normal plane of the centrifugal fan's axis. Alternatively, in other embodiments, the guide surface can also be an arc surface. If the guide surface is arc-shaped, the angle between the straight line connecting the starting and ending points of the arc's curvature and the normal plane of the centrifugal fan's axis is used as the angle. See also... Figure 6 , Figure 6 The image shows the internal space of the upper centrifugal fan 21.

[0058] The air inlet of the upper centrifugal fan 21 is a first air inlet 213. The upper centrifugal fan 21 has a first turning position 21a located between the first air inlet 213 and the first lower air outlet 212. The outer side of the first turning position 21a has a first guide surface 216. The first guide surface 216 forms a first tilt angle α with the normal plane of the axis of the upper centrifugal fan 21. The first tilt angle α is set in the range of 40 degrees to 50 degrees. In this embodiment, the first tilt angle α is 45 degrees.

[0059] More specifically, the upper centrifugal fan 21 includes a first wall plate 214 and a second wall plate 215 connected at a first inclined angle α, a first air inlet 213 is disposed on the first wall plate 214, and a first guide surface 216 is disposed on the second wall plate 215. Figure 6 The location of the first wall panel 214 and the second wall panel 215 is marked in the text, but not in the actual physical structure.

[0060] See Figure 7 , Figure 7 The image shows the internal space of the lower centrifugal fan 22.

[0061] The lower centrifugal fan 22 has a second air inlet 223. Inside the lower centrifugal fan 22, there is a second turning position 22a located between the second air inlet 223 and the second upper air outlet 221. A second guide surface 226 is provided on the outer side of the turn at the second turning position 22a. The second guide surface 226 forms a second inclination angle b with the normal plane of the axis of the lower centrifugal fan 22, with the second inclination angle b ranging from 15 degrees to 25 degrees. Inside the lower centrifugal fan 22, there is a third turning position 22b located between the second air inlet 223 and the second lower air outlet 222. On the outer side of the turn at the third turning position 22b, there is a third guide surface 228. The third guide surface 228 forms a third inclination angle c with the normal plane of the axis of the lower centrifugal fan 22, with the third inclination angle c ranging from 20 degrees to 30 degrees.

[0062] More specifically, the lower centrifugal fan 22 includes a third wall panel 224, a second air inlet 223 disposed on the third wall panel 224, and a fourth wall panel 225, with a second guide surface 226 disposed on the fourth wall panel 225. The fourth wall panel 225 and the third wall panel 224 are connected at a supplementary angle of the second inclination angle b. The lower centrifugal fan 22 also includes a fifth wall panel 227, with a third guide surface 228 disposed on the fifth wall panel 227. The fifth wall panel 227 and the third wall panel 224 are connected at a supplementary angle of the third inclination angle c. Figure 7 The labels indicate the locations of the third wall panel 224, the fourth wall panel 225, and the fifth wall panel 227, but are not actual physical structures.

[0063] In this configuration, a guide surface is set on the outside of the turning position of the centrifugal fan to guide the airflow to turn. In particular, in a better configuration, the setting range of the tilt angle of one turning position of the upper centrifugal fan 21 and the tilt angle of the upper and lower turning positions of the lower centrifugal fan 22 is optimized, which can reduce the local loss caused by the airflow turning and increase the air volume.

[0064] See Figure 8 Previously, the upper channel outlet 232' of the first channel was set in a roughly rectangular shape and arranged side by side with the rectangular first upper air outlet 211 along the axial direction.

[0065] See Figure 9 In this embodiment, the upper channel outlet 232 of the first channel 23 has an "L"-shaped cross-section, and the upper channel outlet 232 includes a first part 2321 and a second part 2322. Figure 9 On the cross-section of the upper channel outlet 232 shown, the first part 2321 and the first upper air outlet 211 are arranged sequentially along the axial direction of the upper centrifugal fan 21, and the second part 2322 and the first upper air outlet 211 are arranged sequentially along the radial direction (lateral direction of the air outlet device) of the upper centrifugal fan 21.

[0066] Combined Figure 1 and Figure 3 In fact, within the main component 1, a side space 18 is formed on one side of the first upper air outlet duct 218, which is biased to one side, in the radial direction of the upper centrifugal fan 21 and the transverse direction of the air outlet device. In this invention, a portion of the first channel 23 is disposed in the side space 18, and the second portion 2322 is opposite to the side space 18. Thus, this invention utilizes the previously unused side space 18 to increase the end section of the first channel 23 and form the second portion 2322, significantly reducing the flow resistance of the upper air outlet duct of the lower fan and increasing the air volume.

[0067] See also Figure 1 , Figure 3 and Figure 7 The second lower air outlet duct 229 of the lower centrifugal fan 22 is also provided with a premixing inlet 223 connecting the inner and outer sides of itself, and the premixing inlet 223 is located on the front side of the second air outlet duct 229 and is opposite to the third turning position 22b of the lower centrifugal fan 22.

[0068] Furthermore, the second channel 24 is provided with a first lower channel outlet 2411 and a second lower channel outlet 2412. The first lower channel outlet 2411 is connected to the lower air outlet 109, and the second lower channel outlet 2412 is connected to the premixing inlet 223. Even further, the area ratio of the first channel outlet 23, the second lower air outlet 222, and the premixing inlet 223 is 2:2:1.

[0069] Combination Figure 18 and Figure 19 The velocity vector diagram of the premixing inlet 223 shows that, due to the different lengths and flow cross-sections of the outlet ducts of the upper centrifugal fan 21 and the lower centrifugal fan 22, the flow resistance of each branch is also different. Specifically, the flow resistance of the first lower outlet duct of the upper centrifugal fan 21 is significantly greater than that of the second lower outlet duct 229 of the lower centrifugal fan 22, and the overall pipe resistance of the air outlet system is not at its lowest point. Increasing the premixing inlet 223 can balance the airflow of each fan branch. Specifically, the premixing inlet 223 is located in the second lower outlet duct 229 of the lower centrifugal fan 22. It can introduce a portion of the airflow from the upper centrifugal fan 21 through the second channel 24 into the second lower outlet duct 229 of the lower centrifugal fan 22. This significantly reduces the flow resistance of the airflow from the upper centrifugal fan 21 while sacrificing a small amount of lower fan airflow, thus reducing the overall flow resistance of the fan system and further increasing the airflow.

[0070] Mainly, this invention designs low-resistance duct parameters, reduces the length of high-flow-resistance ducts, increases the outlet area of ​​branch ducts, and optimizes the deflection angle of the duct at the airflow deflection point, thereby reducing the flow resistance of the fan system and increasing the airflow level. Furthermore, a premixing inlet 223 is provided at the second lower outlet duct 229 of the lower centrifugal fan 22 to balance the pressure between the second channel 24 and the second lower outlet duct 229, which can further reduce the flow resistance of the fan system and thus increase the airflow.

[0071] Furthermore, an opening and closing mechanism can be installed in the air outlet duct of at least one of the upper centrifugal fan and / or the lower centrifugal fan to achieve different air supply modes.

[0072] See Figure 11 For example, in this embodiment, a baffle 29 serving as an opening and closing mechanism is provided in the first upper air outlet duct and the second lower air outlet duct of the upper centrifugal fan, and in the second upper air outlet duct and the second lower air outlet duct of the lower centrifugal fan.

[0073] See Figure 12 and Figure 13 The baffle 29 can be electrically controlled to swing. Figure 12 The closing position shown is the same as Figure 13 Between the indicated open positions, when the baffle 29 is in the closed position, the air outlet duct it is located in is closed and cannot supply air; when the baffle 29 is in the open position, the air outlet duct it is located in is open.

[0074] See Figure 14 and Figure 15 The air outlet device can be switched to the first mode, which is the upper air outlet mode. In this mode, the baffle 29 in the first upper air outlet duct and the baffle 29 in the second upper air outlet duct are both in the open position, and the baffle 29 in the first lower air outlet duct and the baffle 29 in the second lower air outlet duct are both in the closed position. At this time, the airflow is only sent out from the upper air outlet 108.

[0075] See Figure 16 and Figure 17 The air outlet device can be switched to the second mode, which is the downward air outlet mode. In this mode, the baffle 29 in the first upper air outlet duct and the baffle 29 in the second upper air outlet duct are both in the closed position, and the baffle 29 in the first lower air outlet duct and the baffle 29 in the second lower air outlet duct are both in the open position. At this time, the airflow is only sent out from the lower air outlet 109.

[0076] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Air outlet device, including main components, upper centrifugal fan and lower centrifugal fan; The main component includes an upper air outlet and a lower air outlet, and the main component forms a first channel and a second channel; The upper centrifugal fan includes a first upper air outlet and a first lower air outlet; The lower centrifugal fan includes a second upper air outlet and a second lower air outlet; The upper centrifugal fan and the lower centrifugal fan are arranged vertically within the main body assembly; The first upper air outlet is connected to the upper air supply outlet, and the second upper air outlet is connected to the upper air supply outlet through the first channel; The second lower air outlet is connected to the lower air supply outlet, and the first lower air outlet is connected to the lower air supply outlet through the second channel; Its features are: At least one of the upper centrifugal fan and the lower centrifugal fan has a turning position located between its own air inlet and its own air outlet. The outer side of the turning position has a guide surface, and the guide surface is inclined at an angle to the normal plane of the axis of the centrifugal fan.

2. The air outlet device according to claim 1, characterized in that: It also includes at least one of the following: The upper centrifugal fan has an air inlet as a first air inlet. The upper centrifugal fan is provided with a first guide surface located between the first air inlet and the first lower air outlet. The first guide surface forms a first inclination angle with the normal plane of the axis of the upper centrifugal fan. The range of the first inclination angle is 40 degrees to 50 degrees. The air inlet of the lower centrifugal fan is a second air inlet. The lower centrifugal fan is provided with a second guide surface located between the second air inlet and the second upper air outlet. The second guide surface forms a second inclination angle with the normal plane of the axis of the lower centrifugal fan. The range of the second inclination angle is 15 degrees to 25 degrees. The air inlet of the lower centrifugal fan is a second air inlet. The lower centrifugal fan is provided with a third guide surface located between the second air inlet and the second lower air outlet. The third guide surface forms a third inclination angle with the normal plane of the axis of the lower centrifugal fan. The range of the third inclination angle is 20 degrees to 30 degrees.

3. The air outlet device according to claim 2, characterized in that: It also includes at least one of the following: The upper centrifugal fan includes a first wall panel and a second wall panel connected at a supplementary angle to the first inclined angle, the first air inlet is disposed on the first wall panel, and the first guide surface is disposed on the second wall panel. The lower centrifugal fan includes a third wall panel, the second air inlet is disposed on the third wall panel, the lower centrifugal fan also includes a fourth wall panel, the second guide surface is disposed on the fourth wall panel, and the fourth wall panel is connected to the third wall panel at a supplementary angle to the second inclination angle; The lower centrifugal fan includes a third wall panel, the second air inlet is disposed on the third wall panel, the lower centrifugal fan also includes a fifth wall panel, the third guide surface is disposed on the fifth wall panel, and the fifth wall panel is connected to the third wall panel at a supplementary angle to the third inclination angle.

4. The air outlet device according to any one of claims 1 to 3, characterized in that: The first channel is provided with an upper channel outlet, which includes a first part and a second part; On the cross-section of the upper channel outlet, the first portion and the first upper air outlet are arranged sequentially along the axial direction of the upper centrifugal fan, and the second portion and the first upper air outlet are arranged sequentially along the radial direction of the upper centrifugal fan.

5. The air outlet device according to claim 4, characterized in that: The upper centrifugal fan includes a first volute, the first volute includes a first upper air outlet, and the first upper air outlet is the outlet of the first upper air outlet. Within the main body component, a side space is formed on one side of the first upper air outlet duct in the radial direction; A portion of the first channel is disposed in the side space, and the second portion is opposite to the side space.

6. The air outlet device according to any one of claims 1 to 3, characterized in that: The lower centrifugal fan includes a second volute, the second volute includes a second lower air outlet, and the second lower air outlet is the outlet of the second lower air outlet; The second lower air outlet duct is also provided with a premixing inlet connecting its inner and outer sides, and at least a portion of the second channel outlet is connected to the premixing inlet.

7. The air outlet device according to claim 6, characterized in that: The second channel is provided with a first lower channel outlet and a second lower channel outlet. The first lower channel outlet is connected to the lower air outlet, and the second lower channel outlet is connected to the premix inlet. The area ratio of the first channel outlet, the second lower air outlet, and the premixed inlet is 2:2:

1.

8. The air outlet device according to claim 6, characterized in that: The premix inlet is positioned opposite to the turning point of the lower centrifugal fan.

9. The air outlet device according to any one of claims 1 to 3, characterized in that: It also includes at least one of the following: In the height direction of the air outlet device, the first distance between the axis of the upper centrifugal fan and the axis of the lower centrifugal fan is set within the range of 500mm to 540mm. In the height direction of the air outlet device, the second distance between the first upper air outlet and the second lower air outlet is less than 1100mm.

10. The air outlet device according to any one of claims 1 to 3, characterized in that: The main component also includes a partition, which is disposed between the upper centrifugal fan and the lower centrifugal fan. The internal space of the main component is divided by the partition to form the first channel and the second channel.

11. The air outlet device according to claim 10, characterized in that: In the height direction, the third distance between the partition and the axis of the upper centrifugal fan is set in the range of 230mm to 260mm.

12. The air outlet device according to any one of claims 1 to 3, characterized in that: An opening and closing mechanism is provided in at least one air outlet duct of the upper centrifugal fan and / or the lower centrifugal fan.

13. The air outlet device according to claim 12, characterized in that: The upper centrifugal fan includes a first upper air outlet duct and a first lower air outlet duct, the outlet of the first upper air outlet duct is the first upper air outlet, and the outlet of the first lower air outlet duct is the first lower air outlet. The lower centrifugal fan includes a second upper air outlet and a second lower air outlet, the outlet of the second upper air outlet is the second upper air outlet, and the outlet of the second lower air outlet is the second lower air outlet. The first upper air outlet duct, the first lower air outlet duct, the second upper air outlet duct, and the second lower air outlet duct are all equipped with the opening and closing mechanism.

14. An air conditioner characterized by comprising: Includes the air outlet device described in any one of claims 1 to 13 above.

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