Air duct assembly and air conditioner

Abstract

The utility model provides a kind of air duct assembly and air conditioner, air duct assembly includes bottom shell, volute tongue piece and elastic piece, bottom shell includes volute tongue connecting portion, volute tongue piece is detachably connected in volute tongue connecting portion, multiple volute tongue pieces are sequentially arranged along the axial direction of air duct assembly;Elastic piece is connected between volute tongue piece and connecting portion, under the restoring force of elastic piece, volute tongue piece is kept in first position and with fan blade installation site first distance;Under the action of wind pressure, so elastic piece can be forced to compress, and make volute tongue piece move to second position and with fan blade installation site second distance, second distance is greater than first distance.Air conditioner includes above-mentioned air duct assembly.When local wind pressure is too large, the local volute tongue piece moves downward under wind pressure to increase the distance with fan blade, reduce wind speed pressure, ensure that wind pressure from volute tongue everywhere is consistent, reduce the possibility of airflow separation, and improve the stability of airflow, reduce surge noise, improve use experience.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to an air duct assembly and an air conditioner. Background Technology

[0002] An existing air duct assembly for an air conditioner includes a base shell and a volute independent of the base shell. The volute is a long component extending along the fan axial direction and is detachably mounted on the base shell. Furthermore, a threaded connector forms a two-point positioning connection at both ends of the volute's length, providing two-point support for the volute along its length. The volute is made of a material with greater stiffness than the base shell. This design prevents deformation of the volute along its length due to multi-point constraints, thus avoiding inconsistent volute clearance and preventing surge phenomena caused by uneven clearance between the volute and the fan blades due to volute deformation.

[0003] Although the existing air duct components have independent and more rigid volutes, the volutes are long and inevitably bend during molding. In addition, it is difficult to correct them to equalize the gaps during assembly, so the surge phenomenon has not been well resolved. Utility Model Content

[0004] The primary objective of this invention is to provide a duct assembly that further addresses the surge problem.

[0005] The second objective of this invention is to provide an air conditioner that further addresses the surge problem.

[0006] The first objective of this utility model is to provide an air duct assembly comprising a base shell and volutes. The base shell includes a volute connecting portion, and the volutes are detachably connected to the volute connecting portion. The base shell is provided with a fan blade mounting position. It includes at least two volutes, and multiple volutes are arranged sequentially along the axial direction of the air duct assembly. It also includes an elastic element, which connects the volutes to the connecting portion. Under the restoring force of the elastic element, the volutes remain in a first position and are at a first distance from the fan blade mounting position. Under the action of wind pressure, all elastic elements can be compressed, and the volutes can be moved to a second position and at a second distance from the fan blade mounting position, the second distance being greater than the first distance.

[0007] As can be seen from the above solution, firstly, this utility model has multiple volutes arranged along the axial direction, each of which is relatively short, thus improving the problem of bending of excessively long parts; when the local wind pressure is too high in the axial direction, the volute in that area moves downward under the action of wind pressure to increase the distance from the fan blade, thereby reducing wind speed and pressure, and thus ensuring that the wind pressure flowing out of the volutes is consistent in all parts of the axial direction, reducing the possibility of airflow separation, and improving the stability of airflow. More importantly, it reduces surge noise and improves the user experience.

[0008] A further embodiment is that the worm tongue component includes a curved and connected tongue root and a diffuser section, with the connection between the tongue root and the diffuser section forming a tongue tip; the tongue root includes a first distal side away from the tongue tip, the first distal side is provided with a first fastening structure, the bottom shell is provided with a second fastening structure, the first fastening structure and the second fastening structure are fastened together, and / or, the diffuser section includes a second distal side away from the tongue tip, the second distal side is provided with a third fastening structure, the bottom shell is provided with a fourth fastening structure, the third fastening structure and the fourth fastening structure are fastened together.

[0009] A further solution is that the first fastening structure includes a buckle, the second fastening structure includes the edge of the wall panel, and the buckle fastens to the edge of the wall panel; the third fastening structure includes a protrusion, and the fourth fastening structure includes a groove, with the protrusion and the groove engaging, and when the volute floats, the protrusion moves within the groove.

[0010] As can be seen from the above, the snap-fit ​​method makes the assembly of each worm tongue component easier; a better solution is that the worm tongue component mainly forms a stable installation state by using the snap-fit ​​force of the tongue root to fasten the edge of the wall panel and the force of the elastic component, while the cooperation of the protrusion and the groove ensures that the bottom of the worm tongue component and the bottom shell are strengthened while allowing the worm tongue component to have the freedom of movement.

[0011] A further proposed solution is to have at least two latches on the worm tongue component, with a rib protruding from the back of the tongue root, the rib extending axially and connecting between two adjacent latches.

[0012] As can be seen from the above, the worm tongue is tightly fastened to the connecting part by multiple buckles, which can suppress the formation of undesirable torsion in the worm tongue, extend the life of the worm tongue, and further solve the noise problem. Furthermore, the setting of ribs not only improves the bending deformation resistance of the worm tongue in the length direction, but also more firmly combines the tongue root and multiple buckles together, improving the overall strength.

[0013] A further solution is to have an elastic element abut against the back of the tongue tip.

[0014] As can be seen from the above, with the first and second interlocking structures as the rotation center, when the tongue root is subjected to wind pressure, the elastic element is more likely to be compressed and deformed, causing the volute tongue to swing down, thereby increasing the distance from the wind blade.

[0015] A further alternative is to include a compression spring as the elastic element.

[0016] A further option is to install a positioning post on the bottom shell, with a pressure spring mounted on the positioning post, and / or to install a rib plate on the back of the tongue tip, with the pressure spring abutting against the rib plate.

[0017] As can be seen from the above, the positioning post can prevent the pressure spring from loosening, and / or, the rib plate not only strengthens the structural strength of the volute tongue, but also can withstand greater force compared to the wall plate at the tongue root. The setting of the pressure spring abutting against the rib plate makes the floating structure of the volute tongue more stable and durable.

[0018] Another further option is that the bottom shell includes a fan connector and a side portion located between the fan connector and the volute tongue connection; at least a portion of the side portion is made of an elastically deformable material.

[0019] A further approach is to make at least a portion of the sides using silicone.

[0020] As can be seen from the above, replacing the side material with an elastic deformable material, such as silicone, is preferable. When the air pressure on both sides of the outlet is too high, the silicone will deform to slow the airflow, preventing excessively high local airflow velocity or large pressure changes on both sides. This avoids airflow separation in certain areas, the formation of vortices, and the generation of discordant sounds. Furthermore, the side material is connected to the fan mounting base, and its elastic deformation capability can also absorb fan vibration noise.

[0021] The second objective of this utility model is to provide an air conditioner that includes the aforementioned air duct assembly. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of an embodiment of the air conditioner of this utility model.

[0023] Figure 2 This is a cross-sectional view of an embodiment of the air duct assembly and the fan of this utility model.

[0024] Figure 3 This is a structural diagram of an embodiment of the air duct component of this utility model.

[0025] Figure 4 This is a structural diagram of the air duct assembly embodiment of the present invention without the volute tongue component.

[0026] Figure 5 This is a structural diagram of the volute tongue component in an embodiment of the air duct assembly of this utility model.

[0027] Figure 6 This is a cross-sectional view of an embodiment of the air duct assembly of this utility model.

[0028] Figure 7 for Figure 6 Enlarged view of point A in the middle. Detailed Implementation

[0029] Air duct assembly and air conditioner embodiment

[0030] See Figures 1 to 4The air conditioner in this embodiment is an indoor wall-mounted unit, which includes a base shell 1, a volute 2, a fan 3, and a pressure spring 4. It also includes structures found in existing air conditioners, such as an indoor heat exchanger, an air inlet assembly, and an air outlet assembly. The base shell 1 is the assembly, and the fan 3 includes a motor 32 and fan blades 31, with the fan blades 31 being cross-flow fan blades. The air duct assembly of this invention includes a base shell 1, a volute 2, and a pressure spring 4, with the pressure spring 4 being the elastic element of this invention.

[0031] The base shell 1 is provided with a fan blade mounting position 130, which is the position where the fan blade 31 will be installed. The base shell 1 also includes two fan connecting seats 131 located on both axial sides of the fan blade mounting position 130. The base shell 1 also includes a volute connecting portion 12 for mounting and engaging with the pressure spring 4 and the volute tongue member 2. The volute connecting portion 12 extends axially along the base shell 1 on the side connected to the fan blade mounting position 130. In addition, the base shell 1 also includes a side portion 11 connecting each fan connecting seat 131 and the volute connecting portion 12, that is, a side portion 11 is provided on each axial side of the base shell 1. The axial direction of the base shell 1 is consistent with the axial direction of the fan 3 mounted on the base shell 1. For the indoor wall-mounted unit in this embodiment, the axial direction is the width direction of the indoor wall-mounted unit.

[0032] See Figure 5 The volute tongue component 2 includes a curved and connected tongue root 21 and a diffuser section 22, with a tongue tip 23 formed at the connection between the tongue root 21 and the diffuser section 22. The tongue root 21 includes a first distal side 219 away from the tongue tip 23, and a protruding first fastening structure is provided on the back of the first distal side 219. In this embodiment, the first fastening structure is a snap fastener 241. The tongue root 21 includes a first plate having an upper air guide surface facing the fan blade mounting position 130, and the back of the snap fastener 241 is opposite to the upper air guide surface. The snap fastener 241 includes an upright portion 2411 erected on the back surface of the tongue root 21 and a hook portion 2412 curved relative to the upright portion 2411, forming a hook position 2410 between the hook portion 2412 and the back surface of the tongue root 21. Furthermore, the volute tongue 2 is provided with two buckles 241 arranged opposite each other along the aforementioned axial direction, and the back of the tongue root 21 is provided with a rib 252. The rib 252 extends along the length direction of the volute tongue 2, that is, along the axial direction of the fan blade 31 and is connected between the multiple buckles 241.

[0033] The diffuser section 22 includes a second distal side 229 away from the tip of the tongue 23. The second distal side 229 is provided with a third fastening structure. In this embodiment, the third fastening structure is a protrusion 242. Further, the diffuser section 22 includes a second air guide surface facing the air outlet of the air conditioner and a back side opposite to the second air guide surface. The protrusion 242 protrudes from the back side of the diffuser section 22. Further, the protrusion 242 is an approximately triangular protrusion structure. The front and rear sides of the protrusion 242 are both inclined surfaces with a certain guiding function.

[0034] In addition, a rib plate 251 is provided on the back of the tongue tip 23. Specifically, the extension direction of the rib plate 251 is perpendicular to the axial direction, and multiple rib plates 251 are spaced apart along the axial direction and distributed at various points along the axial direction of the volute tongue 2. Among them, two rib plates 251 on both sides of the axial direction are connected between the back of the tongue root 21, the back of the tongue tip 23 and the back of the diffuser section 22, and the remaining rib plates 251 are connected between the back of the tongue tip 23 and the back of the diffuser section 22. The rib plate 251 also serves as the abutment structure of the pressure spring 4.

[0035] Combined Figure 6 and Figure 7 The volute tongue connector 12 includes a first wall plate 121, a third wall plate 123, and a second wall plate 122 that are bent and connected together. The bottom of the first wall plate 121 is connected to the third wall plate 123, while the top of the first wall plate 121 is away from the third wall plate 123. The top edge of the first wall plate 121 serves as the wall plate edge 1211 of this utility model. The buckle 241 is fastened to the wall plate edge 1211, allowing the wall plate edge 1211 to be located in the hook position 2410 with a certain degree of freedom of movement. The upper end of the second wall plate 122 is connected to the third wall plate 123, while the lower end of the second wall plate 122 is away from the third wall plate 123. The lower end of the second wall plate 122 is provided with a groove 1220 with the inlet facing downward. The protrusion 242 cooperates with the groove 1220, and the protrusion 242 has a certain degree of freedom of movement within the groove 1220. A positioning post 124 is provided on the front side of the third wall panel 123. One end of the pressure spring 4 is fitted onto the positioning post 124, and the other end of the pressure spring 4 abuts against the stiffening plate 251.

[0036] Under the restoring force of the pressure spring 4, the volute tongue 2 remains in the first position, and at this time, the volute tongue 2 is at a first distance from the fan blade 31, that is, at a first distance from the fan mounting position 130. Under the action of wind pressure, all elastic elements can be forced to compress, and the volute tongue 2 moves to the second position and is at a second distance from the fan blade 31, that is, at a second distance from the fan mounting position 130. The second distance is greater than the first distance.

[0037] Due to the high-speed rotation of the fan, coupled with the presence of components such as evaporators and electric heaters within the duct, as well as the deformation of parts like the base casing, localized high airflow velocities or excessive pressure variations can occur. This can cause airflow separation in certain areas, forming vortices. These vortices further interfere with normal airflow, leading to instability. After airflow separation, low-pressure areas form on the duct or fan blade surface. These low-pressure areas attract more airflow, further destabilizing the airflow and generating noises such as surge. Figure 3In this embodiment, three volutes 2 are arranged sequentially along the axial direction. Since the three volutes 2 are independent and can float up and down according to the pressure spring 4 and wind pressure, when the wind pressure in any local area along the axial direction is too high, the corresponding volute 2 moves downward under the wind pressure to increase the distance from the fan blade 31, thereby reducing wind speed and pressure. This ensures that the wind pressure flowing out of the volutes 2 is consistent throughout the axial direction, reduces the possibility of airflow separation, improves airflow stability, and, more importantly, reduces surge noise, enhancing the user experience.

[0038] See Figure 2 , Figure 4 and Figure 6 On the other hand, at least a portion of the side portion 11 is made of silicone. If the material of the side portion 11 is changed to an elastically deformable material, silicone is preferable. In this case, when the air pressure on both sides of the air outlet is too high, it will compress the silicone to deform and slow down the airflow, preventing excessively high local airflow velocity or excessive pressure changes on both sides, and avoiding airflow separation and the formation of vortices in certain areas, thus preventing discordant noise. Furthermore, the side portion 11 is connected to the fan connection seat 131, and the elastically deformable side portion 11 can also absorb fan vibration noise. Even better, the entire side portion 11 is made of silicone.

[0039] In other embodiments, the elastic element may also be a sheet spring or a torsion spring, or other elastic elements commonly used in the art.

[0040] In other embodiments, the first and second fastening structures, as well as the third and fourth fastening structures, can be combinations of fastening structures commonly used in the art, such as a combination of hooks and holes.

[0041] In other embodiments, the volute tongue and the volute tongue connecting part can be connected using other commonly used movable connection methods in the art. For example, the volute tongue and the volute tongue connecting part can be hinged. For example, the volute tongue and the volute tongue connecting part can achieve an arc-shaped sliding connection through the cooperation of an arc-shaped groove and a slider. These connection methods can all achieve the ability to force the elastic element to compress under wind pressure and move the volute tongue to a second position at a second distance from the wind blade mounting position, the second distance being greater than the first distance.

[0042] In other embodiments, the sides may also be made of other existing elastic deformable materials, such as rubber.

[0043] 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. A duct assembly, comprising a base and a volute, the base including a volute connecting portion, the volute being detachably connected to the volute connecting portion, and the base being provided with a fan blade mounting position; Its features are: It includes at least two of the aforementioned volute tongues, and a plurality of the aforementioned volute tongues are arranged sequentially along the axial direction of the air duct assembly; An elastic element connects the volute tongue to the connecting part; Under the restoring force of the elastic element, the volute tongue remains in the first position and at a first distance from the fan blade mounting position; Under wind pressure, the elastic element can be forced to compress, and the volute can be moved to a second position at a second distance from the fan blade mounting position, the second distance being greater than the first distance.

2. The air duct assembly according to claim 1, characterized in that: The volute tongue component includes a curved and connected tongue root and a diffuser section, with the tongue tip formed at the connection between the tongue root and the diffuser section. The tongue root includes a first distal side away from the tongue tip, the first distal side being provided with a first fastening structure, and the bottom shell being provided with a second fastening structure, the first fastening structure and the second fastening structure being fastened together. And / or, The diffuser section includes a second distal side away from the tip of the tongue, the second distal side is provided with a third fastening structure, the bottom shell is provided with a fourth fastening structure, and the third fastening structure and the fourth fastening structure are fastened together.

3. The air duct assembly according to claim 2, characterized in that: The first fastening structure includes a snap fastener, and the second fastening structure includes a wall panel edge, wherein the snap fastener is fastened to the wall panel edge; The third fastening structure includes a protrusion, and the fourth fastening structure includes a groove. The protrusion engages with the groove, and when the volute floats, the protrusion moves within the groove.

4. The air duct assembly according to claim 3, characterized in that: The volute tongue is provided with at least two of the buckles, and a rib is protruding from the back of the tongue root. The rib extends along the axial direction and connects between two adjacent buckles.

5. The air duct assembly according to any one of claims 2 to 4, characterized in that: The elastic element abuts against the back of the tip of the tongue.

6. The air duct assembly according to claim 5, characterized in that: The elastic element includes a pressure spring.

7. The air duct assembly according to claim 6, characterized in that: The bottom shell is provided with a positioning post, the pressure spring is fitted on the positioning post, and / or, the back of the tongue tip is provided with a rib plate, and the pressure spring abuts against the rib plate.

8. The air duct assembly according to any one of claims 1 to 4, characterized in that: The bottom shell includes a fan connecting seat and a side portion located between the fan connecting seat and the volute tongue connecting portion; At least a portion of the side portion is made of an elastically deformable material.

9. The air duct assembly according to claim 8, characterized in that: At least a portion of the side is made of silicone.

10. An air conditioner characterized by Includes the air duct assembly as described in any one of claims 1 to 9.

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