Heating air duct assembly and clothes processing equipment

Abstract

The invention discloses a heating air duct assembly and clothes processing equipment, the heating air duct assembly comprises a shell and a heating piece, a main air duct and a shunting air duct are formed in the shell, one end of the shunting air duct is communicated with the main air duct through a shunting port, the other end of the shunting air duct is communicated with the main air duct through a confluence port, and the heating piece is arranged in the main air duct; the heating piece forms a retention area for retaining part of airflow in the main air duct, part of airflow in the main air duct can enter the flow dividing air duct from the flow dividing opening and then flow back to the main air duct through the flow converging opening, and the flow converging opening faces the retention area. The airflow flowing from the confluence port to the main air duct can disturb the airflow in the retention area, the airflow in the retention area is prevented from being heated repeatedly to cause overhigh temperature, and the structures of the main air duct and the shunting air ducts are stable and reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of air flow heating. Specifically, it relates to a heating air duct assembly and a laundry treatment device including the heating air duct assembly. Background Art

[0002] In the prior art, a drying duct assembly is provided in a conventional laundry treatment device. A heating element is provided in the drying duct assembly. The drying duct joint of the drying duct assembly communicates with the laundry treatment chamber of the laundry treatment device, so as to direct the air flow heated by the heating element to the laundry treatment chamber. The high-temperature air flow contacts the wet laundry in the laundry treatment chamber and dries the wet laundry. There is a gap between the heating element and the drying duct assembly. The air flow in the drying duct flows through the heating element. Most of the air flow is directly blown out, and a small part of the air flow is retained by the heating element. The temperature of this part of the high-temperature air flow is too high after being repeatedly heated, causing local dry burning of the drying duct assembly. There is a risk of local overheating in the drying duct assembly, which limits the power of the heating element and the maximum heating temperature. Inevitably, a small amount of lint enters the drying duct in the laundry treatment device. The high-temperature air flow may ignite the lint and cause a fire, posing a great risk. Moreover, the local temperature of the drying duct assembly is too high, the temperature uniformity is poor, the temperature of the air flow blown out by the drying duct is uneven, and the laundry drying effect is poor, affecting the user experience.

[0003] A Chinese invention patent with the publication number CN116949782A discloses a drying duct assembly and a laundry treatment device having the same. The drying duct assembly includes a housing, a heating assembly, and a flow disturbance portion. A drying duct is formed in the housing. The heating assembly is disposed in the drying duct. The flow disturbance portion is disposed on the housing and at least partially protrudes from the inner wall of the drying duct or is disposed on the heating assembly to disturb the air flow in the drying duct. In the above technical solution, the flow disturbance portion is a flow disturbance plate installed on the housing or the heating assembly. There are certain requirements for the installation position, number, direction, etc. of the flow disturbance plate. Moreover, the installation method of the flow disturbance plate is unstable, and the structure of the flow disturbance piece is relatively weak. It will be deformed and loosened after being blown by the high-temperature air flow for a long time, resulting in changes in the direction and angle of the flow disturbance plate. The direction and angle of the flow disturbance plate have a great influence on the actual effect. And once the direction of the flow disturbance piece is inappropriate, it may exacerbate the situation of repeated heating of the air flow temperature in the retention area, increasing the risk. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present invention provides a heating air duct assembly and a laundry treatment device.

[0005] To achieve the above-mentioned invention purposes, the present invention is implemented by adopting the following technical solutions: According to a first aspect of the present invention, there is provided a heating air duct assembly, including: A housing, inside which a main air duct and a diversion air duct are formed. One end of the diversion air duct communicates with the main air duct through a diversion opening, and the other end communicates with the main air duct through a confluence opening. A heating element, which is arranged in the main air duct, and the heating element forms a retention area for retaining part of the air flow in the main air duct. Wherein, part of the air flow in the main air duct can enter the diversion air duct from the diversion opening and then return to the main air duct through the confluence opening, and the confluence opening faces the retention area.

[0006] In some embodiments of the present invention, the heating element forms at least two retention areas for retaining the air flow in the main air duct. The confluence opening faces one of the retention areas, and the diversion opening is close to the other retention area.

[0007] In some embodiments of the present invention, the inner wall of the main air duct forms a first guiding surface extending to the diversion opening, and the first guiding surface is configured to guide part of the air flow in the main air duct to flow towards the retention area close to the diversion opening.

[0008] In some embodiments of the present invention, a gap is left between the heating element and the side wall of the main air duct to form a side air duct, and the diversion opening and the confluence opening communicate with the side air duct.

[0009] In some embodiments of the present invention, the housing includes a first side wall and a second side wall arranged on opposite sides of the main air duct. The heating element includes at least two retention areas facing the first side wall and at least two retention areas facing the second side wall, and the diversion air ducts are respectively arranged on the first side wall and the second side wall.

[0010] In some embodiments of the present invention, a diversion member is arranged in the main air duct. The diversion member includes a first diversion surface and a second diversion surface arranged at an angle. The first diversion surface is configured to guide part of the air flow to flow towards the diversion air duct on the first side wall, and the second diversion surface is configured to guide part of the air flow to flow towards the diversion air duct on the second side wall.

[0011] In some embodiments of the present invention, the air flow direction flowing out of the confluence opening is perpendicular or approximately perpendicular to the air flow direction in the main air duct.

[0012] In some embodiments of the present invention, the air flow rate in the main air duct is greater than the air flow rate in the diversion air duct.

[0013] In some embodiments of the present invention, the diversion air duct is configured as a streamlined structure.

[0014] According to the second aspect of the present invention, there is also provided a laundry treatment device, including the above-mentioned heating air duct assembly.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In the main air duct of the heating air duct assembly, part of the air flow can enter the shunt air duct from the shunt opening, and then return to the main air duct through the confluence opening. The confluence opening faces the stagnant area of the heating element. The air flow flowing from the confluence opening to the main air duct can disturb the air flow in the stagnant area, accelerate the air flow in the stagnant area, and make the air flow leave the stagnant area faster, thereby avoiding the problem of overheating caused by the repeated heating of the air flow in the stagnant area. The main air duct and the shunt air duct are formed on the housing, with stable and reliable structure, and will not deform during long-term use, which can ensure the flow disturbance effect.

[0016] After reading the specific embodiments of the present invention in conjunction with the drawings, other features and advantages of the present invention will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a cross-sectional view of the first embodiment of the heating air duct assembly proposed by the present invention; Figure 2 is a schematic cross-sectional view of the housing in the first embodiment of the heating air duct assembly proposed by the present invention; Figure 3 is one of the cross-sectional views of the shunt air duct provided on the third side wall in the first embodiment of the heating air duct assembly proposed by the present invention; Figure 4 is the second cross-sectional view of the shunt air duct provided on the third side wall in the first embodiment of the heating air duct assembly proposed by the present invention; Figure 5 is a cross-sectional view of the second embodiment of the heating air duct assembly proposed by the present invention; Figure 6 is a schematic view of the shunt member in the second embodiment of the heating air duct assembly proposed by the present invention.

[0019] In the figure, 10. Housing; 11. Main air duct; 12. Shunt air duct; 13. Shunt opening; 14. Confluence opening; 101. First side wall; 102. Second side wall; 103. Third side wall; 104. Fourth side wall; 110, Side air duct; 111, First guiding surface; 112, Second guiding surface; 121, First shunt air duct; 122, Second shunt air duct; 131, First shunt opening; 132, Second shunt opening; 141, First confluence opening; 142, Second confluence opening; 20, Heating element; 21, Retention area; 211, First retention area; 212, Second retention area; 213, Third retention area; 214, Fourth retention area; 30, Shunt part; 31, First shunt surface; 32, Second shunt surface. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "middle", "front", "rear", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In the description of the implementation manners, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0023] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0024] In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0025] Refer to Figures 1 to 6The following shows a heating air duct assembly provided by the present invention. The heating air duct assembly can be applied to electrical appliances with heating or drying functions, such as clothes dryers, washer-dryers, warm air heaters, dishwashers, etc. The following embodiments will describe the heating air duct assembly in detail in combination with specific structures. Embodiment 1

[0026] Refer to Figures 1 to 4 As shown in the first embodiment of the heating air duct, the heating air duct assembly provided in this embodiment includes a housing 10 and a heating element 20. A main air duct 11 and a shunt air duct 12 are formed inside the housing 10. One end of the shunt air duct 12 communicates with the main air duct 11 through a shunt port 13, and the other end of the shunt air duct 12 communicates with the main air duct 11 through a confluence port 14. The heating element 20 is disposed in the main air duct 11 for heating the air flow in the main air duct 11, and the heating element 20 forms a retention zone 21 for retaining part of the air flow in the main air duct 11. The heating element 20 forms at least one retention zone 21.

[0027] As Figure 1 shown, part of the air flow in the main air duct 11 can enter the shunt air duct 12 from the shunt port 13, and then flow back to the main air duct 11 through the confluence port 14. The shunt air duct 12 can change the flow direction of the air flow. The confluence port 14 faces the retention zone 21 of the heating element 20, which can disturb the air flow in the retention zone 21, accelerate the flow of the air flow in the retention zone 21, and enable the air flow to leave the retention zone 21 faster, thereby avoiding the problem of excessive temperature caused by the repeated heating of the air flow in the retention zone 21. The main air duct 11 and the shunt air duct 12 are formed on the housing 10, with a stable and reliable structure that will not deform during long-term use, and can ensure the turbulence effect.

[0028] Specifically, one end of the main air duct 11 is the air inlet end, and the other end is the air outlet end. The air flow in the main air duct 11 flows from the air inlet end to the air outlet end. The air flow direction from the air inlet end to the air outlet end of the main air duct 11 is defined as the first direction. A gap is left between the heating element 20 and the inner wall of the housing 10, and the air flow in the main air duct 11 can flow through the gap. The retention zone 21 of the heating element 20 blocks the air flow in the main air duct 11 in the first direction, preventing the air flow from flowing in the first direction. The air flow direction from the confluence port 14 to the main air duct 11 forms an angle with the first direction, which can disturb the air flow in the main air duct 11. The air flow in the shunt air duct 12 can also be heated by the heating element 20 when flowing from the confluence port 14 to the retention zone 21, making the air flow temperature blown out from the air outlet end of the main air duct 11 uniform. The shunt port 13 is located behind the confluence port 14, that is, the shunt port 13 is relatively closer to the air inlet end of the main air duct 11 than the confluence port 14.

[0029] The housing 10 can be made of heat-resistant materials. The main air duct 11 can be arranged in a linear structure, an arc structure, a horn-shaped structure or other structures, etc. The shunt air duct 12 is arranged on one of the side walls of the main air duct 11. The heating element 20 can be an electric heating wire, a heating sheet, etc., which generates heat after being energized. The heating element 20 is fixedly connected to the housing 10 to define the position of the heating element 20 in the main air duct 11.

[0030] The heating element 20 can be arranged in a bent structure, such as an "S" shape, a "U" shape, an "E" shape, a wavy structure, etc., which has a larger contact area with the air flow in the main air duct 11 and is beneficial to improving the heating efficiency of the air flow. Part of the surface of the heating element 20 is perpendicular or approximately perpendicular to the first direction, which hinders the air flow. The heating element 20 forms a concave retention area 21 at the bent part.

[0031] In one embodiment, as Figure 1 shown, there is a gap between the heating element 20 and the side wall of the main air duct 11 to form a side air duct 110. The shunt port 13 and the confluence port 14 communicate with the side air duct 110. The retention area 21 of the heating element 20 forms an opening facing the side air duct 110. The side air duct 110 is a part of the main air duct 11. Part of the air flow in the main air duct 11 passes through the side air duct 110. Part of the air flow in the side air duct 110 enters the shunt air duct 12 through the shunt port 13, and the air flow in the shunt air duct 12 returns to the side air duct 110 through the confluence port 14. The speed and direction of the air flow in the side air duct 110 are less affected by the heating element 20 and are more affected at the shunt port 13 and the confluence port 14, thus having a disturbing effect on the air flow in the retention area 21.

[0032] In one embodiment, as Figure 1 shown, the shunt air duct 12 is configured in a streamlined structure. The angle between the extending direction of the shunt air duct 12 from the shunt port 13 to the confluence port 14 and the first direction gradually increases. This can reduce the resistance to the air flow in the shunt air duct 12 and reduce the wind pressure loss.

[0033] In one embodiment, as Figure 1 shown, the heating element 20 forms at least two retention areas 21 that retain the air flow in the main air duct 11. The confluence port 14 faces one of the retention areas 21, and the shunt port 13 is close to the other retention area 21. The air flow in the shunt air duct 12 flows from the confluence port 14 to the corresponding retention area 21, disturbing the air flow in the retention area 21. When part of the air flow in the main air duct 11 enters the shunt port 13, the flow direction and pressure of the air flow in the main air duct 11 change. The air flow in the retention area 21 close to the shunt port 13 is disturbed, causing the air flow to leave the retention area 21 faster and avoiding the overheating caused by the air flow being repeatedly heated in the retention area 21.

[0034] In one embodiment, as Figure 1As shown, the inner wall of the main air duct 11 forms a first guiding surface 111 extending to the diversion opening 13. The first guiding surface 111 is configured to guide a part of the air flow in the main air duct 11 to flow towards the stagnant area 21 near the diversion opening 13, disturbing the air flow in the stagnant area 21, enabling the air flow to leave the stagnant area 21 faster, and preventing the air flow from being repeatedly heated in the stagnant area 21 and resulting in too high a temperature.

[0035] Specifically, the first guiding surface 111 is located on the side of the diversion opening 13 close to the confluence opening 14. The first guiding surface 111 inclines towards the inside of the main air duct 11 along the first direction, guiding the air flow passing through the first guiding surface 111 to flow towards the stagnant area 21 near the diversion opening 13. The first guiding surface 111 is located in the side air duct 110, guiding the air flow in the side air duct 110 to flow towards the stagnant area 21 near the diversion opening 13.

[0036] In one embodiment, the air flow direction flowing out of the confluence opening 14 is perpendicular or approximately perpendicular to the air flow direction in the main air duct 11. The air flows in the two perpendicular or approximately perpendicular directions disturb each other to a greater extent, and can achieve a better disturbing effect on the air flow in the stagnant area 21 near the confluence opening 14.

[0037] Furthermore, the inner wall of the main air duct 11 forms a second guiding surface 112 extending to the confluence opening 14. The second guiding surface 112 is used to guide a part of the air flow in the main air duct 11, such that the air flow direction passing through the second guiding surface 112 is perpendicular or approximately perpendicular to the air flow direction flowing from the confluence opening 14 into the main air duct 11. The second guiding surface 112 is located on the side of the confluence opening 14 close to the diversion opening 13.

[0038] Specifically, the included angle between the end of the diversion air duct 12 connected to the confluence opening 14 and the first direction does not exceed 90°. The included angle between the end of the diversion air duct 12 connected to the confluence opening 14 and the second guiding surface 112 is 90° or approximately 90°, so that the air flow direction flowing from the diversion air duct 12 through the confluence opening 14 into the main air duct 11 is perpendicular or approximately perpendicular to the air flow direction passing through the second guiding surface 112, to ensure the air flow disturbing effect. The included angle between the end of the diversion air duct 12 connected to the confluence opening 14 and the main air duct 11 can be set as an acute angle, which can reduce the resistance of the diversion air duct 12 to the air flow.

[0039] As Figure 1 shown, the inner wall of the main air duct 11 between the diversion opening 13 and the confluence opening 14 can form an arc surface, that is, the first guiding surface 111, the second guiding surface 112 of the main air duct 11 and the inner wall between the first guiding surface 111 and the second guiding surface 112 form an arc surface. The arc surface bulges towards the inside of the main air duct 11, guiding the air flow direction and reducing the wind resistance.

[0040] In one embodiment, the air flow rate in the main air duct 11 is greater than that in the shunt air duct 12. Specifically, after the air flow in the main air duct 11 is shunted through the shunt opening 13, the remaining air flow rate in the main air duct 11 is greater than that in the shunt air duct 12, so as to ensure the heating efficiency of the heating element 20 for the air flow, reduce the heat loss of the heating element 20, and make the temperature of the air flow blown out from the air outlet end of the main air duct 11 uniform.

[0041] As Figure 2 In one embodiment as described above, the housing 10 includes a first side wall 101, a second side wall 102, a third side wall 103, and a fourth side wall 104 that enclose the main air duct 11. The first side wall 101 and the second side wall 102 are disposed opposite to each other, and the third side wall 103 and the fourth side wall 104 are disposed opposite to each other. The shunt air duct 12 can be disposed on any one of the first side wall 101, the second side wall 102, the third side wall 103, and the fourth side wall 104. Of course, the cross-sectional shape of the housing 10 is not limited to a rectangle, and can also be a circle or other shapes.

[0042] In one embodiment, the heating element 20 forms at least two concave retention zones 21, and the openings of the retention zones 21 face the first side wall 101. The shunt air duct 12 can be disposed on the first side wall 101, or can also be disposed on the third side wall 103 and / or the fourth side wall 104, as long as the air flow can flow from the confluence opening 14 into the retention zones 21. For example Figure 1 In a specific embodiment as shown, the shunt air duct 12 is disposed on the first side wall 101, and the shunt opening 13 and the confluence opening 14 are formed on the first side wall 101. For example Figure 3 And Figure 4 In a specific embodiment as shown, the shunt air duct 12 is disposed on the third side wall 103, and the shunt opening 13 and the confluence opening 14 are formed on the third side wall 103.

[0043] Taking the application of the heating air duct assembly to a laundry treatment device as an example, a blower is provided at the air inlet end of the main air duct 11, and the air outlet end of the main air duct 11 is communicated with the device inner cavity for accommodating clothes. The blower sends the air flow into the main air duct 11, and the air flow is heated by the heating element 20 in the main air duct 11 and then enters the device inner cavity to dry the clothes.

[0044] Specifically, a part of the air flow in the main air duct 11 flows along the side air duct 110 and can flow along the first diversion surface 111 towards the stagnant area 21 near the diversion opening 13, disturbing the air flow in the stagnant area 21. A part of the air flow enters the diversion air duct 12 from the diversion opening 13 and then returns to the side air duct 110 from the confluence opening 14, disturbing the air flow in the side air duct 110 and causing the air flow to flow towards the stagnant area 21 near the confluence opening 14, disturbing the air flow in the stagnant area 21. After the air flow in the stagnant area 21 of the heating element 20 is disturbed, it can leave the stagnant area 21 faster, avoiding the air flow in the stagnant area 21 from being repeatedly heated and having too high a temperature. Thereby, the power limitation on the heating element 20 can be reduced, the lint in the clothes entering the main air duct 11 can be prevented from being ignited by the heating element 20, and the air flow temperature can be made uniform, improving the drying effect. Embodiment Two

[0045] Reference Figure 5 , the difference between the heating air duct assembly provided in this embodiment and that in Embodiment One is that a main air duct 11 and at least two diversion air ducts 12 are formed inside the housing 10. The at least two diversion air ducts 12 can be arranged on the same side wall of the main air duct 11 or on different side walls of the main air duct 11.

[0046] In this embodiment, the housing 10 includes a first side wall 101 and a second side wall 102 arranged on opposite sides of the main air duct 11. The heating element 20 includes at least two stagnant areas 21 facing the first side wall 101 and at least two stagnant areas 21 facing the second side wall 102. Diversion air ducts 12 are respectively arranged on the first side wall 101 and the second side wall 102.

[0047] Continue to refer to Figure 5 , in a specific example, the heating element 20 is continuously bent in an "S" shape, and the heating element 20 extends along a first direction in the main air duct 11, forming a first stagnant area 211 and a second stagnant area 212 facing the first side wall 101, and a third stagnant area 213 and a fourth stagnant area 214 facing the second side wall 102. The diversion air duct 12 is divided into a first diversion air duct 121 and a second diversion air duct 122. The first diversion air duct 121 is located on the first side wall 101 and is used to disturb the air flow in the first stagnant area 211 and the second stagnant area 212. The second diversion air duct 122 is located on the second side wall 102 and is used to disturb the air flow in the third stagnant area 213 and the fourth stagnant area 214.

[0048] Specifically, one end of the first diversion air duct 121 communicates with the main air duct 11 through the first diversion opening 131, and the other end communicates with the main air duct 11 through the first confluence opening 141. The first diversion opening 131 is close to the first retention area 211, and the first confluence opening 141 faces the second retention area 212. The inner wall of the main air duct 11 between the first diversion opening 131 and the first confluence opening 141 may be provided with a first guiding surface 111 and a second guiding surface 112. The first guiding surface 111 at this location guides the air flow towards the first retention area 211, and the second guiding surface 112 at this location guides the air flow disturbance from the first confluence opening 141 towards the second retention area 212.

[0049] One end of the second diversion air duct 122 communicates with the main air duct 11 through the second diversion opening 132, and the other end communicates with the main air duct 11 through the second confluence opening 142. The second diversion opening 132 is close to the third retention area 213, and the second confluence opening 142 faces the fourth retention area 214. The inner wall of the main air duct 11 between the second diversion opening 132 and the second confluence opening 142 may be provided with a first guiding surface 111 and a second guiding surface 112. The first guiding surface 111 at this location guides the air flow towards the third retention area 213, and the second guiding surface 112 at this location guides the air flow disturbance from the second confluence opening 142 towards the fourth retention area 214.

[0050] The length of the heating element 20 can be set according to the requirement for heating efficiency. When a higher heating efficiency is required, the heating element 20 forms more retention areas 21, and more diversion air ducts 12 can be provided in the housing 10. Each diversion air duct 12 is at least used to disturb the air flow in one retention area 21.

[0051] In one embodiment, as Figure 5 and Figure 6 shown, a diversion member 30 may be provided in the main air duct 11 for guiding the air flow in the main air duct 11. The diversion member 30 includes a first diversion surface 31 and a second diversion surface 32 arranged at an angle. Among them, the first diversion surface 31 is configured to guide a part of the air flow towards the diversion air duct 12 on the first side wall 101, and the second diversion surface 32 is configured to guide a part of the air flow towards the diversion air duct 12 on the second side wall 102. Specifically, the first diversion surface 31 guides a part of the air flow towards the first diversion air duct 121, and the second diversion surface 32 guides a part of the air flow towards the second diversion air duct 122. The first diversion surface 31 bends or inclines towards the first side wall 101 in the first direction, and the second diversion surface 32 bends or inclines towards the second side wall 102 in the first direction.

[0052] The flow divider 30 is located on the side of the heating element 20 close to the air inlet end of the main air duct 11, and there is a certain distance between the flow divider 30 and the heating element 20. The flow divider 30 is arranged at the middle position of the main air duct 11, and the distance from the flow divider 30 to the first side wall 101 is equal to the distance from the flow divider 30 to the second side wall 102, so as to evenly separate the air flow in the main air duct 11. The flow divider 30 can increase the air flow rate entering the first diversion air duct 121 and the second diversion air duct 122, and ensure the disturbance effect on the air flow in the retention area 21.

[0053] The flow divider 30 can be arranged in a "Y" - shaped structure, a "V" - shaped structure, a triangular structure, etc. The first diversion surface 31 and the second diversion surface 32 can form a tip and face the air inlet end of the main air duct 11. The flow divider 30 can be fixedly connected to the housing 10 by welding, bonding, integral molding, fastener connection, etc., to prevent loosening.

[0054] The present invention also provides a laundry treatment device, including the heating air duct assembly described above in this specification. The specific structure, principle, effect, etc. of the heating air duct assembly can refer to the specific introduction in Embodiment 1 and Embodiment 2, which will not be elaborated here.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent substitution on some of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A heating air duct assembly, characterized in that, Comprising: A housing, inside which a main air duct and a shunt air duct are formed. One end of the shunt air duct communicates with the main air duct through a shunt opening, and the other end communicates with the main air duct through a confluence opening. A heating element, which is arranged in the main air duct, and the heating element forms a retention area for retaining part of the air flow in the main air duct. Wherein, part of the air flow in the main air duct can enter the shunt air duct from the shunt opening and then return to the main air duct through the confluence opening, and the confluence opening faces the retention area.

2. The heating air duct assembly according to claim 1, wherein: The heating element forms at least two retention areas for retaining the air flow in the main air duct. The confluence opening faces one of the retention areas, and the shunt opening is close to the other retention area.

3. The heating air duct assembly according to claim 2, wherein: The inner wall of the main air duct forms a first guiding surface extending to the shunt opening, and the first guiding surface is configured to guide part of the air flow in the main air duct to flow towards the retention area close to the shunt opening.

4. The heating air duct assembly according to claim 2, wherein: A gap is left between the heating element and the side wall of the main air duct to form a side air duct, and the shunt opening and the confluence opening communicate with the side air duct.

5. The heating air duct assembly according to claim 2, wherein: The housing includes a first side wall and a second side wall arranged on opposite sides of the main air duct. The heating element includes at least two retention areas facing the first side wall and at least two retention areas facing the second side wall. The shunt air ducts are respectively arranged on the first side wall and the second side wall.

6. The heating air duct assembly according to claim 5, wherein: A shunt member is arranged in the main air duct. The shunt member includes a first shunt surface and a second shunt surface arranged at an angle. The first shunt surface is configured to guide part of the air flow to flow towards the shunt air duct on the first side wall, and the second shunt surface is configured to guide part of the air flow to flow towards the shunt air duct on the second side wall.

7. The heating air duct assembly according to claim 1, wherein: The air flow direction flowing out of the confluence opening is perpendicular or approximately perpendicular to the air flow direction in the main air duct.

8. The heating air duct assembly according to claim 1, wherein: The air flow rate in the main air duct is greater than the air flow rate in the shunt air duct.

9. The heating air duct assembly according to any one of claims 1 to 8, wherein: The shunt air duct is configured into a streamlined structure.

10. A laundry treatment device, characterized in that, Comprising the heating air duct assembly according to any one of claims 1 to 9.

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