Folding air supply device

Abstract

The application discloses a folding air supply device, which uses a cross-flow fan as a power source, and air is supplied through first air supply channels of first air supply modules and second air supply channels of second air supply modules on two sides, so that the air supply covers a larger area, and the air supply intensity is halved under the same air supply amount, and the air supply is softer and more uniform; the key point is that the first air supply modules and the second air supply modules are folded with each other when not in use, so that the volume of the whole device can be greatly reduced, and the space occupancy rate of the transverse width is very small. In addition, heating components, refrigeration components, humidifying components, dehumidifying components and air purification components are arranged in the first air supply channels and / or the second air supply channels, so that the folding air supply device can be used as a warm air device, a cold air device, a humidifier, a dehumidifier and an air purifier.

Description

Technical Field

[0001] This invention belongs to the technical field of airflow regulation or control devices, and specifically relates to a foldable air supply device. Background Technology

[0002] In a broad sense, everything from small ventilation fans and regular fans to large air conditioners, humidifiers, air dryers, and air purifiers can be considered a type of air supply device. These devices achieve their intended functions by regulating and controlling airflow. The intended functions are, in fact, used in conjunction with cooling, heating, humidification, dehumidification, and air purification measures while supplying air.

[0003] In terms of application scenarios, fans, humidifiers, clothes dryers, heaters, and air purifiers are all portable air supply devices; for example, they can be easily moved from the bedroom to the living room for use. These air supply devices are even portable, and can be taken along when traveling for business or vacation to meet personal needs; for example, some users who have a habit of washing clothes every day can carry a clothes dryer with them; and some users who are particularly concerned about the air quality in their sleeping environment can also carry an air purifier with them.

[0004] Since we're discussing portability and even ease of movement, this places newer and higher demands on the size and structural design of the corresponding air supply devices. In particular, achieving both portability and high air supply efficiency is a challenging technical problem.

[0005] First, existing air supply devices are generally single-channel air outlets; this means that when the air supply volume needs to be increased, the air supply intensity of a single channel will inevitably be very high, resulting in excessive wind speed near the air outlet and a poor user experience.

[0006] Taking clothes dryers as an example, considering portability and ease of storage, some folding dryers have appeared on the market. Most of these folding dryers have a single air outlet on the main body. During operation, hot air is delivered through this single outlet. When the hot air blows directly onto the surface of the clothes to dry them, the hot air from this single outlet overheats and dries the adjacent areas of the clothes, while the more distant areas are difficult to dry. Furthermore, because the air outlet and airflow channel are singular, turbulence is not easily formed during the airflow process, preventing the clothes from undulating and resulting in poor drying performance. Additionally, in existing folding dryers, the folding part refers to the unfoldable or foldable clothing support structure on the periphery of the main body, not the foldable airflow structure itself.

[0007] In summary, the limitations of single-channel air supply and the inability to fold the main body of the air supply device are common in existing air supply devices. Summary of the Invention

[0008] The purpose of this invention is to provide a foldable air supply device, which aims to improve the flexibility of air supply while also facilitating storage. This invention is achieved through the following technical solution:

[0009] A foldable air supply device includes a first air supply module, a second air supply module, and a cross-flow fan. The ends of the first and second air supply modules are coaxially connected and folded or unfolded relative to each other. The cross-flow fan is disposed inside the shaft connection portion of the first and second air supply modules. The first and second air supply modules are respectively provided with a first air supply channel and a second air supply channel communicating with the cross-flow fan. The air outlets of the first and second air supply channels are disposed on the sides of the first and second air supply modules that are close to each other.

[0010] As a preferred technical solution, at least one of a heating component, a cooling component, a humidifying component, a dehumidifying component, and an air purification component is provided in the first air supply channel and / or the second air supply channel.

[0011] As a preferred technical solution, a switchable connection structure is provided in the first air supply channel and / or the second air supply channel, and the heating component, cooling component, humidifying component, dehumidifying component and air purification component are switchedly installed on the switchable connection structure.

[0012] As a preferred technical solution, the first air supply module includes a first housing and a first sleeve disposed at the end of the first housing, and the second air supply module includes a second housing and a second sleeve disposed at the end of the second housing; the first sleeve and the second sleeve are coaxially connected to each other in a rotatable manner, and an axial accommodating cavity is formed inside the first sleeve and the second sleeve after they are connected, and the cross-flow fan is axially disposed in the accommodating cavity.

[0013] As a preferred technical solution, the end of the first housing is axially divided into two sections and a second sleeve guide mechanism and the first sleeve are respectively provided thereon; the end of the second housing is axially divided into two sections and a first sleeve guide mechanism and the second sleeve are respectively provided thereon; after the first sleeve and the second sleeve are connected, the first sleeve is adapted to the first sleeve guide mechanism and the second sleeve is adapted to the second sleeve guide mechanism.

[0014] As a preferred technical solution, the first sleeve guiding mechanism includes a first arc-shaped guide member that matches the curvature of the outer edge of the first sleeve and first axial guide members respectively provided at both ends of the first arc-shaped guide member; the second sleeve guiding mechanism includes a second arc-shaped guide member that matches the curvature of the outer edge of the second sleeve and second axial guide members respectively provided at both ends of the second arc-shaped guide member.

[0015] As a preferred technical solution, the mating portion of the first sleeve and the second sleeve is provided with a mating connection mechanism that restricts their axial movement and allows them to rotate circumferentially.

[0016] As a preferred technical solution, the outer periphery of the mating portion of the first sleeve relative to the second sleeve is provided with a concave fitting groove, and the inner periphery of the mating portion of the second sleeve relative to the first sleeve is provided with a convex fitting piece. The fitting piece is axially confined within the fitting groove and rotates circumferentially relative to the fitting groove.

[0017] As a preferred technical solution, the first housing and the second housing have the same axial width, and the first sleeve and the second sleeve have the same axial width as the first housing or the second housing after docking.

[0018] As a preferred technical solution, the first sleeve has a first air inlet on its cylindrical wall, and the second sleeve has a second air inlet on its cylindrical wall; the first housing has a third air inlet, and the second housing has a fourth air inlet; when the first air supply module and the second air supply module are deployed, the accommodating cavity is connected to the outside through the first air inlet and the fourth air inlet, and the accommodating cavity is connected to the outside through the second air inlet and the third air inlet.

[0019] As a preferred technical solution, the third air inlet and the fourth air inlet are respectively located on the opposite sides of the first housing and the second housing.

[0020] As a preferred technical solution, a fifth air inlet is provided on the wall of the first sleeve, and a sixth air inlet is provided on the wall of the second sleeve; when the first air supply module and the second air supply module are deployed to each other, the fifth air inlet and the sixth air inlet directly connect the accommodating cavity to the outside.

[0021] As a preferred technical solution, the first sleeve has a first communication port that is connected to the inner cavity of the first housing. The first air supply channel is formed by the first air duct housing. The air inlet end of the first air duct housing extends into the first sleeve through the first communication port, and the air outlet end of the first air duct housing is connected to the air outlet of the first air supply channel.

[0022] As a preferred technical solution, the first air duct housing includes the air inlet end, the air guide section and the air outlet end. The air inlet end includes a volute and a volute tongue, which are disposed on both sides of the section of the cross-flow impeller located inside the first sleeve.

[0023] As a preferred technical solution, the second sleeve has a second communication port that is connected to the inner cavity of the second housing. The second air supply channel is formed by the second air duct housing. The air inlet end of the second air duct housing extends into the second sleeve through the second communication port. The air outlet end of the second air duct housing is connected to the air outlet of the second air supply channel.

[0024] As a preferred technical solution, the second air duct housing includes the air inlet end, the air guide section and the air outlet end. The air inlet end includes a volute and a volute tongue, which are disposed on both sides of the section of the cross-flow impeller located inside the second sleeve.

[0025] The beneficial effects of the foldable air supply device provided by the present invention include, but are not limited to, the following aspects:

[0026] By utilizing a cross-flow fan as a power source, air can be delivered through the first air delivery channel of the first air delivery module and the second air delivery channel of the second air delivery module, resulting in a larger air delivery coverage area and halving the air delivery intensity for the same air volume, making it gentler and more uniform. Furthermore, by adjusting the unfolding angle between the first and second air delivery modules, the air delivery coverage range can be adjusted, and turbulence can be created using the airflow from the two channels. Moreover, when not in use, the first and second air delivery modules can be folded together, significantly reducing the overall size of the device, especially the lateral width. Furthermore, by incorporating heating, cooling, humidifying, dehumidifying, and air purification components within the first and / or second air delivery channels, this foldable air delivery device of the present invention, in addition to its simple air delivery function, also integrates heating, cooling, humidifying, dehumidifying, and air purification functions, thus enabling it to be used as a heater, air cooler, humidifier, dehumidifier, and air purifier. Attached Figure Description

[0027] Figure 1 This is a perspective view of the foldable air supply device provided in an embodiment of the present invention in a folded state.

[0028] Figure 2 This is a perspective view of the foldable air supply device provided in an embodiment of the present invention in its unfolded state.

[0029] Figure 3 This is an exploded view of the foldable air supply device provided in an embodiment of the present invention.

[0030] Figure 4 This is a view of the first and second air supply modules in the foldable air supply device provided in an embodiment of the present invention, showing their opposite sides before assembly.

[0031] Figure 5This is a cross-sectional view of the relevant assembly parts of the foldable air supply device provided in the embodiment of the present invention before the first air supply module and the second air supply module are assembled.

[0032] Figure 6 This is a cross-sectional view of the relevant assembly parts after the first air supply module and the second air supply module in the foldable air supply device provided in the embodiment of the present invention are assembled.

[0033] Figure 7 This is a cross-sectional view of the relevant assembly parts after the first air supply module, the second air supply module, and the cross-flow impeller are assembled in the foldable air supply device provided in the embodiment of the present invention.

[0034] Figure 8 This is a perspective view of the first air duct housing in the foldable air supply device provided in an embodiment of the present invention.

[0035] Figure 9 This is a perspective view of the second air duct housing in the foldable air supply device provided in an embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of the air path for air delivery through the first air delivery channel in the foldable air supply device provided in the embodiments of the present invention, under the first air intake method.

[0037] Figure 11 This is a schematic diagram of the air path for air delivery through the second air delivery channel in the foldable air supply device provided in the embodiments of the present invention, under the first air intake method.

[0038] Figure 12 This is a schematic diagram of the airflow path of the foldable air supply device provided in the embodiment of the present invention, under the second air intake method, where air is supplied through the first air supply channel.

[0039] Figure 13 This is a schematic diagram of the airflow path of the foldable air supply device provided in the embodiment of the present invention, under the second air intake method, where air is supplied through the second air supply channel.

[0040] Figure 14 This is a schematic diagram of an existing duct shell forming an oblique airflow at the air outlet.

[0041] Figure 15 This is a schematic diagram showing the air supply cloud pattern formed by the first air duct shell and the second air duct shell at the corresponding air outlet in the foldable air supply device provided in the embodiment of the present invention.

[0042] Explanation of icon numbers:

[0043] 10-First air supply module, 11-First housing, 116-First connecting port, 12-First sleeve, 121-Matching groove, 125-First air inlet, 126-Third air inlet, 123-Fifth air inlet, 13-Second sleeve guide mechanism, 131-Second arc-shaped guide, 132-Second axial guide, 15-First air duct housing, 151-Air inlet end, 152-Air guide section, 153-Exhaust outlet end, 1511-Volume housing, 1512-Volume tongue, 16-Heating component, 20-Second air supply module, 21-Second housing, 216-Second connecting port, 22-Second sleeve, 221-Matching piece, 2 25-Second air inlet, 226-Fourth air inlet, 223-Sixth air inlet, 23-First sleeve guide mechanism, 231-First arc-shaped guide, 232-First axial guide, 25-Second air duct housing, 251-Air inlet end, 252-Air guide section, 253-Air outlet end, 2511-Volume housing, 2512-Volume tongue, 26-Heating component, 30-Cross-flow fan wheel, 31-Fan wheel body, 32-Fan wheel motor, 301-Shaft connection, 302-Accommodation cavity, 303-Cross-flow fan wheel mounting base, 100-First air supply channel, 101-Air outlet, 200-Second air supply channel, 201-Air outlet. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0045] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are intended to facilitate a clear description of the structure of the product or device and are not intended to limit the actual orientation of the product or device during production, use, sales, etc.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "setting," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] Combination Figure 1 , Figure 2 and Figure 3 As shown, the foldable air supply device provided in this embodiment includes a first air supply module 10, a second air supply module 20, and a cross-flow impeller 30. The ends of the first air supply module 10 and the second air supply module 20 are coaxially connected and folded or unfolded together. The cross-flow impeller 30 is disposed inside the shaft connection portion 301 of the first air supply module 10 and the second air supply module 20. The first air supply module 10 and the second air supply module 20 are respectively provided with a first air supply channel 100 and a second air supply channel 200 communicating with the cross-flow impeller 30 (in conjunction with...). Figure 10 and Figure 11 The specific formation and structure of the first air supply channel 100 and the second air supply channel 200 can be implemented in various ways, which will be described in detail below.

[0050] In addition, the air outlet 101 of the first air supply channel 100 and the air outlet 201 of the second air supply channel 200 are respectively located on the sides of the first air supply module 10 and the second air supply module 20 that are close together. In this embodiment, the close-to-each side refers to the side where the first air supply module 10 and the second air supply module 20 are close together when they are folded together; conversely, there is also a separating side, which refers to the side where the first air supply module 10 and the second air supply module 20 are away from each other when they are folded together.

[0051] In the above embodiments, by placing the cross-flow fan 30 inside the shaft connection 301 of the first air supply module 20 and the second air supply module 30, when the first air supply module 20 and the second air supply module 30 are unfolded and used, the cross-flow fan 30 can be used as a single power source to supply air to the first air supply channel 100 and the second air supply channel 200 respectively, resulting in a larger overall air supply coverage area and more flexible usage. Moreover, the air supply intensity is halved under the same air supply volume, making it gentler and more uniform. In addition, by adjusting the unfolding angle between the first air supply module 10 and the second air supply module 20, the air supply coverage range can be adjusted, and turbulence can be formed by the airflow of the two air channels. Most importantly, when not in use, the first air supply module 10 and the second air supply module 20 can be folded together, which can greatly reduce the volume of the entire device, especially the lateral width space occupation rate will be very small, making it easy to move and even carry.

[0052] In some preferred embodiments, at least one of a heating component, a cooling component, a humidifying component, a dehumidifying component, and an air purification component is provided in the first air supply channel 100 and / or the second air supply channel 200. Based on this, the foldable air supply device provided in this embodiment, in addition to its simple air supply function, can also incorporate heating, cooling, humidification, dehumidification, and air purification functions, thus correspondingly realizing a heater, a cooler, a humidifier, a dehumidifier, and an air purifier. For example, Figure 3 , Figure 10 , Figure 11 In the embodiment shown, heating element 16 and heating element 26 are respectively provided in the first air supply channel 100 and the second air supply channel 200. In this way, the foldable air supply device provided in this embodiment can be used as a clothes dryer that delivers warm air, or it can be directly called a warm air clothes dryer.

[0053] In some preferred embodiments, a switchable connection structure (not shown) is provided within the first air supply channel 100 and / or the second air supply channel 200. The heating component, cooling component, humidifying component, dehumidifying component, air purification component, etc., are alternately installed on the switchable connection structure. This allows different types of functional components to be installed in a switchable manner, enabling the foldable air supply device provided in this embodiment to switch between different functions. For example, when humidification is required, the atomizing component is installed in the air supply channel; when cooling is required, the ice pack component can be installed in the air supply channel; when air purification is required, the filter component or sterilization component can be installed in the air supply channel.

[0054] Combination Figure 2 and Figure 3As shown, the first air supply module 10 includes a first housing 11 and a first sleeve 12, with the first sleeve 12 integrally formed or fixedly connected to the end of the first housing 11. Similarly, the second air supply module 20 includes a second housing 21 and a second sleeve 22, with the second sleeve 22 integrally formed or fixedly connected to the end of the second housing 21. The first sleeve 12 and the second sleeve 22 are coaxially connected and rotatably connected. Simultaneously, after the first sleeve 12 and the second sleeve 22 are connected, an axially accommodating cavity 302 is formed inside them, penetrating the connection point. The cross-flow impeller 30 is axially disposed within the accommodating cavity 302. (See also...) Figure 6 .

[0055] Specifically, in combination Figure 3 , Figure 6 and Figure 7 As shown, the cross-flow wind turbine 30 includes a wind turbine body 31 and a wind turbine motor 32. A cross-flow wind turbine mounting base 303 is provided on the inner end wall of the first sleeve 12, and the wind turbine motor 32 is fixedly mounted on the cross-flow wind turbine mounting base 303. Alternatively, a cross-flow wind turbine mounting base can be provided on the inner end wall of the second sleeve 22, and the cross-flow wind turbine 30 can be fixedly mounted on the inner end wall of the second sleeve 22.

[0056] In the above implementation scheme, the first sleeve 12 and the second sleeve 22 are coaxially connected and rotate relative to each other to form the shaft connection part 301 mentioned above, which is the rotating shaft that hinges the first air supply module 10 and the second air supply module 20 to each other; and, after the first sleeve 12 and the second sleeve 22 are connected, a receiving cavity 302 is provided for the setting of the cross-flow fan 30. The cross-flow fan 30 set in the receiving cavity 302 does not support the first air supply module 10 and the second air supply module 20, but performs the function of airflow driving within the receiving cavity 302.

[0057] Combination Figure 3 , Figure 4 and Figure 5 As shown, the end of the first housing 11 is axially divided into two sections, one of which is provided with a first sleeve 12 and the other of which is provided with a second sleeve guide mechanism 13; similarly, the end of the second housing 21 is axially divided into two sections, one of which is provided with a second sleeve 22 and the other of which is provided with a first sleeve guide mechanism 23; after the first sleeve 12 and the second sleeve 22 are axially connected, the first sleeve 12 is adapted to the first sleeve guide mechanism 23 and the second sleeve 22 is adapted to the second sleeve guide mechanism 13.

[0058] Specifically, the first sleeve guide mechanism 23 includes a first arc-shaped guide 231 that matches the curvature of the outer edge of the first sleeve 12 and first axial guides 232 respectively provided at both ends of the first arc-shaped guide 231; similarly, the second sleeve guide mechanism 13 includes a second arc-shaped guide 131 that matches the curvature of the outer edge of the second sleeve 22 and second axial guides 132 respectively provided at both ends of the second arc-shaped guide 131.

[0059] In the above embodiments, after the first sleeve 12 and the second sleeve 22 are axially connected, the first sleeve guide mechanism 23 provides guidance and limiting function for the relative rotation of the first sleeve 12, and the second sleeve guide mechanism 13 provides guidance and limiting function for the relative rotation of the second sleeve 22. Moreover, the overall structure is simple, compact and stable.

[0060] See also Figure 3 and Figure 5 The first sleeve 12 and the second sleeve 22 are provided with a mating connection mechanism at their respective abutment portions, which restricts their axial movement but allows them to rotate circumferentially. Specifically, the outer periphery of the abutment portion of the first sleeve 12 relative to the second sleeve 22 is provided with a concave fitting groove 121, and the inner periphery of the abutment portion of the second sleeve 22 relative to the first sleeve 12 is provided with a convex fitting piece 221. The fitting piece 221 is axially confined within the fitting groove 121 and rotates circumferentially relative to the fitting groove 121; thereby abutting the first sleeve 12 and the second sleeve 22 together. The cross-sectional view of the periphery of the abutment portion after abutment is shown in the figure. Figure 6 As shown.

[0061] Combination Figure 1 , Figure 2 , Figures 5 to 7 As shown, the first housing 11 and the second housing 21 have the same axial width, and the first sleeve 12 and the second sleeve 22, after docking, also have the same axial width as the first housing 11 or the second housing 21. This makes the overall structure of the foldable air supply device provided in this embodiment more regular, and easier to store, move, and carry.

[0062] As mentioned above, the first air supply module 10 and the second air supply module 20 are respectively provided with a first air supply channel 100 and a second air supply channel 200 communicating with the cross-flow impeller 30; as an air supply device, the foldable air supply device provided in this embodiment will certainly have an air inlet communicating with the cross-flow impeller 30. Regarding the setting of the air inlet, this embodiment provides two specific implementation methods, which are described as follows:

[0063] Method 1: Combination Figure 1 , Figure 4 , Figure 5As shown, the first sleeve 12 has a first air inlet 125 on its cylinder wall, and the second sleeve has a second air inlet 225 on its cylinder wall; simultaneously, the first housing 11 has a third air inlet 126, and the second housing 21 has a fourth air inlet 226; combined with Figure 10 and Figure 11 As shown, when the first air supply module 10 and the second air supply module 20 are deployed, the accommodating cavity 302 is connected to the outside via the first air inlet 125 and the fourth air inlet 226. The accommodating cavity 302 is also connected to the outside via the second air inlet 225 and the third air inlet 126. The third air inlet 126 and the fourth air inlet 226 are respectively located on the opposite sides of the first housing 11 and the second housing 21.

[0064] Method 2: Combining Figure 12 and Figure 13 As shown, the first sleeve 12 has a fifth air inlet 123 on its cylinder wall, and the second sleeve 22 has a sixth air inlet 223 on its cylinder wall; when the first air supply module 10 and the second air supply module 20 are deployed to each other, the fifth air inlet 123 and the sixth air inlet 223 directly connect the accommodating cavity 302 to the outside.

[0065] As a specific implementation method, combined with Figure 3 and Figure 10 As shown, the first air supply channel 100 is constrained by the first air duct housing 15, and a heating device 16 is disposed inside the first air duct housing 15; the first sleeve 12 has a first communication port 116 that is connected to the inner cavity of the first housing 11, the air inlet end of the first air duct housing 15 extends into the first sleeve 12 through the first communication port 116, and the air outlet end of the first air duct housing 15 is connected to the air outlet 101 of the first air supply channel 100; moreover, the air outlet end of the first air duct housing 15 is perpendicularly connected to the air outlet 101 of the first air supply channel 100.

[0066] As a specific implementation method, combined with Figure 3 and Figure 11 As shown, the second air supply channel 200 is constrained by the second air duct housing 25, and a heating device 26 is disposed inside the second air duct housing 25; the second sleeve 22 has a second communication port 216 that is connected to the inner cavity of the second housing 21, the air inlet end of the second air duct housing 25 extends into the second sleeve 22 through the second communication port 216, and the air outlet end of the second air duct housing 25 is connected to the air outlet 201 of the second air supply channel 200; moreover, the air outlet end of the second air duct housing 25 is perpendicularly connected to the air outlet 201 of the second air supply channel 200.

[0067] Combination Figure 8 and Figure 10As shown, the first air duct housing 15 includes an air inlet end 151, an air guide section 152, and an air outlet end 153. The air inlet end 151 includes a volute 1511 and a volute tongue 1512, which are located on both circumferential sides of the section of the cross-flow impeller 30 located inside the first sleeve 12. Similarly, combined with Figure 9 and Figure 11 As shown, the second air duct housing 25 includes an air inlet end 251, an air guide section 252 and an air outlet end 253. The air inlet end 251 includes a volute 2511 and a volute tongue 2512, which are located on both sides of the circumferential direction of the section of the cross-flow impeller 30 located inside the second sleeve 22.

[0068] Among them, both volute tongue 1512 and volute tongue 2512 have a windward surface, which is a concave curved surface with its shape line concentric with the outer contour of the cross-flow impeller 30; the minimum radial distance between the windward surface of the volute tongue 1512 and volute tongue 2512 structure and the outer contour of the cross-flow impeller 30 is A, and the diameter of the cross-flow impeller 30 is D. Then the structure satisfies: 1D / 28≤A≤1D / 10.

[0069] This technical solution defines the shape of the volute tongue and the gap between the volute tongue and the impeller. The volute tongue shape and the outer diameter of the impeller blade are set as concentric circles, which can better guide the airflow. The ratio of the volute tongue gap to the impeller outer diameter has a significant impact on the flow rate and efficiency, and also has a certain impact on the duct pressure. When the tongue gap is large, the fan head decreases and the flow rate decreases; when the tongue gap is small, the pressure increases and the flow rate increases, but the noise peak and sound quality will also deteriorate, and it will affect the subsequent duct conversion and impeller safety regulations. Therefore, this parameter needs to be controlled.

[0070] Furthermore, the profiles of volutes 1511 and 2511 are preferably helical lines, and secondly, arcs formed by unequally spaced base circles. The minimum distance between the volute profile and the cross-flow impeller is at the volute throat, and the minimum distance between the volute throat and the impeller is E. Therefore, the structure satisfies: 1D / 22≤E≤1D / 11.

[0071] The above technical solution limits the minimum gap between the volute and the impeller. Increasing the distance between the cross-flow impeller 30 and the volute will lead to a decrease in air volume, and increasing the volute spacing will cause the vortex area at the rear end of the volute to gradually increase, resulting in increased turbulence noise. Too small a volute throat gap will increase the unevenness of airflow velocity and pressure inside the impeller, increase the pulsating force in the area around the volute, and increase the rotational noise. Therefore, this parameter needs to be limited.

[0072] See also Figure 10With the cross-flow impeller 30 horizontally aligned with the central axis H of the ground as a reference, the volute 1511 of the first air duct housing 15 is positioned below the horizontal central axis H. With the cross-flow impeller 30 perpendicular to the central axis Z of the ground as a reference, the volute tongue 1512 of the first air duct housing 15 is arranged in a clockwise positive angle distribution. The angle formed between the wind-cutting position of the volute tongue 1512 and the central axis Z is the volute tongue phase angle θ1, which satisfies: 0°≤θ1≤90°.

[0073] See also Figure 11 With the cross-flow impeller 30 horizontally aligned with the central axis H of the ground as a reference, the volute 2511 of the second air duct housing 25 is positioned above the horizontal central axis H. With the cross-flow impeller 30 perpendicular to the central axis Z of the ground as a reference, the volute tongue 2512 of the second air duct housing 25 is arranged in a clockwise positive angle distribution. The angle formed between the wind-cutting position of the volute tongue 2512 and the central axis Z is the volute tongue phase angle θ2, which satisfies: 0°≥θ2≥-90°.

[0074] The above two schemes impose restrictions on the volute position and volute tongue phase angle of the first air duct housing 15 and the second air duct housing 25. The air cutting direction of the cross-flow air duct is determined by the combined action of the volute tongue and the volute housing. In order to ensure that the two air ducts can achieve synchronous, uniform and efficient air delivery on both sides of the two air ducts under the premise of single motor drive and same impeller rotation, the above settings are made.

[0075] See also Figure 10 and Figure 11 If the width of both air outlet 101 and air outlet 201 is set to b, then the above structure satisfies: 1D / 2≤b≤D. This technical solution limits the width of the cross-flow duct outlet. If the outlet size is too small, it will reduce the width of the air jet at the outlet and the uniformity of airflow. If the outlet size is too large, it will cause uneven air velocity on the left and right sides of the outlet, reduce the outlet air velocity, and thus affect the air supply performance.

[0076] See also Figure 10 and Figure 11 Let the lengths of both guide sections 152 and 252 be L. Then L satisfies: 1 / D / 2 ≤ L ≤ 3 / 2D. Because the airflow field of the cross-flow duct will be deflected along the tangential direction of the volute tongue, this guide section is set up to ensure that the main airflow at the duct outlet is perpendicular to the first shell 11 or the second shell 12 and uniformly supplied upwards. Figure 15 As shown, this can effectively improve the problem of airflow deflection in existing technologies (such as...). Figure 14 As shown in the figure, this enhances the uniformity of air supply in the duct; however, if the distance of the air guide section is too small, the above effect cannot be achieved, and if the distance is too large, it will increase the friction loss along the duct and reduce the outlet air velocity and air volume.

[0077] See also Figure 10 and Figure 11The heating element 16 or heating element 26 is placed relatively parallel to the rotation axis of the cross-flow fan 30, and the horizontal distance between the heating element 16 or heating element 26 and the cross-flow fan 30 is C. Then the above dimensions satisfy: 2 / 3D≤C≤2D. This technical solution limits the horizontal distance between the heating element and the cross-flow fan 30. If the distance between the heating element and the cross-flow fan 30 is too small, the internal structure of the cross-flow fan 30 will be deformed due to the high temperature of the heating element itself, affecting its aerodynamic performance. If the distance between the heating element and the cross-flow fan 30 is too far, the surface of the heating element will be unevenly exposed to air, affecting the heating effect of the warm air.

[0078] Combination Figure 15 As shown, this invention features an innovative double-sided air supply duct. When used for drying clothes with warm air, the hot air is delivered from both sides to the middle, resulting in more even coverage of the clothes. This effectively improves the problems of existing dryers, such as concentrated air supply and uneven drying due to a single air duct arrangement, which leads to low drying efficiency.

[0079] The above embodiments are merely a full disclosure and not a limitation of the present invention. Any substitution of equivalent technical features based on the creative intent of the present invention without creative effort should be considered as within the scope of this application.

Claims

1. A foldable air supply device, characterized in that: The system includes a first air supply module, a second air supply module, and a cross-flow impeller. The ends of the first and second air supply modules are coaxially connected and folded or unfolded relative to each other. The first and second air supply modules are respectively provided with a first air supply channel and a second air supply channel communicating with the cross-flow impeller. The air outlets of the first and second air supply channels are located on the sides of the first and second air supply modules that are close to each other. The first air supply module includes a first housing and a first sleeve at the end of the first housing. The second air supply module includes a second housing and a second sleeve at the end of the second housing. The first and second sleeves are coaxially connected and rotate relative to each other, forming an axial accommodating cavity inside. The cross-flow impeller is axially disposed within the accommodating cavity. The cylinder walls of the first and second sleeves are respectively provided with air inlets for the first and second air supply channels.

2. The foldable air supply device according to claim 1, characterized in that: The first air supply channel and / or the second air supply channel are provided with at least one of the following: a heating component, a cooling component, a humidifying component, a dehumidifying component, and an air purification component.

3. The foldable air supply device according to claim 2, characterized in that: A switchable connection structure is provided in the first air supply channel and / or the second air supply channel, and the heating component, cooling component, humidifying component, dehumidifying component and air purification component are switchedly installed on the switchable connection structure.

4. The foldable air supply device according to claim 1, characterized in that: The first housing is axially divided into two sections at its end, and a second sleeve guide mechanism and a first sleeve are respectively provided thereon; the second housing is axially divided into two sections at its end, and a first sleeve guide mechanism and a second sleeve are respectively provided thereon; after the first sleeve and the second sleeve are connected, the first sleeve is adapted to the first sleeve guide mechanism, and the second sleeve is adapted to the second sleeve guide mechanism.

5. The foldable air supply device according to claim 4, characterized in that: The first sleeve guiding mechanism includes a first arc-shaped guide that matches the curvature of the outer edge of the first sleeve and first axial guides respectively provided at both ends of the first arc-shaped guide; the second sleeve guiding mechanism includes a second arc-shaped guide that matches the curvature of the outer edge of the second sleeve and second axial guides respectively provided at both ends of the second arc-shaped guide.

6. The foldable air supply device according to claim 4, characterized in that: The first sleeve and the second sleeve are provided with a docking connection mechanism at their mating parts that restricts their axial movement and allows them to rotate circumferentially.

7. The foldable air supply device according to claim 6, characterized in that: The outer periphery of the mating portion of the first sleeve relative to the second sleeve is provided with a concave fitting groove, and the inner periphery of the mating portion of the second sleeve relative to the first sleeve is provided with a convex fitting piece. The fitting piece is axially confined within the fitting groove and rotates circumferentially relative to the fitting groove.

8. The foldable air supply device according to claim 5, characterized in that: The first housing and the second housing have the same axial width, and the first sleeve and the second sleeve have the same axial width as the first housing or the second housing after being connected.

9. The foldable air supply device according to claim 4, characterized in that: The first sleeve has a first air inlet on its cylindrical wall, and the second sleeve has a second air inlet on its cylindrical wall; the first housing has a third air inlet, and the second housing has a fourth air inlet; when the first air supply module and the second air supply module are deployed, the accommodating cavity is connected to the outside through the first air inlet and the fourth air inlet, and the accommodating cavity is connected to the outside through the second air inlet and the third air inlet.

10. The foldable air supply device according to claim 9, characterized in that: The third and fourth air inlets are respectively located on the opposite sides of the first and second housings.

11. The foldable air supply device according to claim 4, characterized in that: The first sleeve has a fifth air inlet on its wall, and the second sleeve has a sixth air inlet on its wall. When the first air supply module and the second air supply module are deployed, the fifth air inlet and the sixth air inlet directly connect the accommodating cavity to the outside.

12. The foldable air supply device according to claim 9, characterized in that: The first sleeve has a first communication port that is connected to the inner cavity of the first housing. The first air supply channel is formed by the first air duct housing. The air inlet end of the first air duct housing extends into the first sleeve through the first communication port. The air outlet end of the first air duct housing is connected to the air outlet of the first air supply channel.

13. The foldable air supply device according to claim 12, characterized in that: The first air duct housing includes the air inlet end, the air guide section and the air outlet end. The air inlet end includes a volute and a volute tongue, which are disposed on both sides of the section of the cross-flow impeller located inside the first sleeve.

14. The foldable air supply device according to claim 9, characterized in that: The second sleeve has a second communication port that is connected to the inner cavity of the second housing. The second air supply channel is formed by the second air duct housing. The air inlet end of the second air duct housing extends into the second sleeve through the second communication port. The air outlet end of the second air duct housing is connected to the air outlet of the second air supply channel.

15. The foldable air supply device according to claim 14, characterized in that: The second air duct housing includes the air inlet end, the air guide section and the air outlet end. The air inlet end includes a volute and a volute tongue, which are located on both sides of the section of the cross-flow impeller located inside the second sleeve.

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