Blowing device

Abstract

The utility model provides an air blowing device which is characterized in that an opening is formed in the top surface of a mainframe box, an air inlet and an air blowing opening are formed in a panel, a switching pipeline is connected to a first side wall of the mainframe box, and an air outlet is formed in the switching pipeline; an air exchange opening is formed in the second side wall of the mainframe box, a switching piece is arranged between the air exchange opening and the switching pipeline, the switching piece is rotatably arranged in the mainframe box so that the mainframe box can alternately communicate with the air outlet and the air exchange opening, and a rotating shaft of the switching piece is perpendicular to the bottom face of the mainframe box; the panel covers the mainframe box and the switching pipeline, the air inlet is communicated with the mainframe box through the opening so as to suck air under the action of the air power device, and the air blowing opening in the panel is communicated with the air outlet so as to enable the air sucked into the mainframe box to be blown out from the air outlet and the air blowing opening; or, the air sucked into the mainframe box is blown out from the ventilation port, and various switching pipelines can be arranged to be matched with panels of different specifications and sizes so as to be compatible with different product appearances and installation environments.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to a blowing device. Background Art

[0002] Yuba, as a type of hair-drying device, is a must-have bathroom hair-drying and heating equipment for many families. It is mainly used to provide heating, lighting, ventilation and other functions to ensure comfort when bathing in cold seasons.

[0003] like Figure 1 As shown, the bathroom heater includes a main box 1 and a panel 2 arranged on the main box 1. The main box 1 includes a bottom surface opposite to the panel 2 and side surfaces surrounded by the bottom surface. A volute and a fan arranged in the volute are provided in the main box 1. An air inlet 3 and an air outlet 4 are provided on the panel 2. The main box 1 is provided with a heating element 5 on the inner side of the air outlet 4. A ventilation port 7 is provided on one side surface of the main box 1 near the air outlet 4. The air inlet 3 is connected to the inlet of the volute to introduce air. The air outlet 4 is connected to the volute to form a blowing channel. The ventilation port 7 is connected to the volute to form a ventilation channel. An air duct switching baffle 6 is rotatably provided between the blowing channel and the ventilation channel. When the air duct switching baffle 6 is rotated to cut off the ventilation channel, the blowing port 4 is connected with the air inlet 3, and the wind is heated by the heating element 5 and blown out from the blowing port 4, implementing the blowing working mode; when the air duct switching baffle 6 is rotated to cut off the blowing channel, the ventilation port 8 is connected with the air inlet 3, and the wind is blown out from the ventilation port 8, implementing the ventilation working mode.

[0004] The panel is the part of the bathroom heater that is displayed to consumers after installation. It has both decorative requirements and limitations on the installation environment. Therefore, mature bathroom heater manufacturers will produce panels of different sizes and designs to meet market demand. Generally speaking, the relative positions of the air inlet 3 and the air outlet 4 are different for panels of different sizes and designs. However, the relative positions of the air inlet 3 and the air outlet 4 of the above-mentioned bathroom heater are fixed, and it is not possible to flexibly adapt to panels 2 of various sizes to be compatible with different product appearances and installation environments, resulting in poor versatility. Utility Model Content

[0005] The embodiment of the present application provides a blowing device to solve the technical problem in the prior art that the main box of the bathroom heater cannot flexibly adapt to panels of various specifications and sizes to be compatible with different product appearances and installation environments, and has poor versatility.

[0006] To solve the above technical problems, an embodiment of the present application provides a blowing device, comprising a main box and a panel, wherein the top surface of the main box is open, and the panel is provided with an air inlet and an air blowing port;

[0007] An air dynamic device is provided in the main box, a first side wall of the main box is connected to a transfer pipe, the transfer pipe is in communication with the main box, and an air outlet is provided on the transfer pipe;

[0008] A ventilation port is provided on the second side wall of the main chassis, and a switching baffle is provided between the ventilation port and the adapter duct. The switching baffle is rotatably disposed in the main chassis to allow the main chassis to alternately connect the air outlet and the ventilation port, and a rotation axis of the switching baffle is perpendicular to the bottom surface of the main chassis;

[0009] The panel covers the main case and the adapter pipe, and the air inlet thereon is connected with the main case through the opening to inhale air under the action of the aerodynamic device, and the air blowing port thereon is connected with the air outlet so that the air inhaled into the main case is blown out from the air outlet and the air blowing port, or the air inhaled into the main case is blown out from the ventilation port.

[0010] Furthermore, the adapter pipe is detachably connected to the main chassis.

[0011] Furthermore, a volute is provided in the main housing, the aerodynamic device is provided in the volute, and the volute forms a volute air duct connected to the air inlet;

[0012] The volute air duct extends to the first side wall to form a communication hole, and the transfer pipe is connected to the volute air duct through the communication hole;

[0013] The aerodynamic device forces air to enter the transfer duct from the air inlet and the volute air duct in sequence.

[0014] Furthermore, the second side wall is adjacent to the first side wall, the ventilation port is connected to the volute air duct, and the switching baffle is arranged between the communicating hole and the ventilation port, and the switching baffle is rotatably arranged in the volute air duct;

[0015] When the switching baffle rotates to the first position, the switching baffle blocks and isolates the connecting hole, and the volute air duct is connected to the ventilation port; when the switching baffle rotates to the second position, the switching baffle blocks and isolates the ventilation port, and the volute air duct is connected to the transfer pipe through the connecting hole.

[0016] Furthermore, the rotating shaft of the switching baffle is the motor shaft of the motor, the motor shaft is perpendicular to the bottom surface of the main chassis, one side of the switching baffle is fixed on the motor shaft, and when the motor shaft rotates, it drives the switching baffle to rotate.

[0017] Furthermore, the main chassis is provided with a heating element on the inner side of the connecting hole.

[0018] Furthermore, the adapter pipe is connected to the main chassis by a buckle, and a first buckle head extending upward is provided on the upper edge of the end face of the adapter pipe, and a first buckle groove is provided on the opposite lower edge;

[0019] A second buckle groove is provided on the end surface of the main chassis opening corresponding to the first buckle head, and a second buckle head is provided on the inner side of the communicating hole corresponding to the first buckle groove;

[0020] When the adapter pipe is assembled on the main chassis, the first buckle is fastened in the second buckle groove, and the second buckle is fastened in the first buckle groove.

[0021] Furthermore, one end of the transfer pipe connected to the communicating hole on the main chassis is a bell mouth.

[0022] Furthermore, the transfer pipe extends along the length direction of the main chassis, and the air outlet extends along the length direction of the main chassis;

[0023] The adapter pipe and the main box are connected to the panel through a mounting rail. A connecting block is provided at one end of the adapter pipe away from the main box. The connecting block is higher than the air outlet, and the connecting block, the main box and the mounting rail are fixedly connected. The panel is fixed on the mounting rail.

[0024] Furthermore, the adapter pipe extends along the width direction of the main box, and the air outlet extends along the width direction of the main box; the adapter pipe and the main box are fixed to the panel by buckles.

[0025] Since the adapter duct is a separate part from the main chassis and is detachably connected to the main chassis, it is possible to match panels of different specifications and sizes by setting a variety of adapter ducts with air outlets of different relative positions (relative position relative to the air inlet), sizes and shapes to be compatible with different product appearances and installation environments; the adapter duct itself has a simple structure and small size. Under the premise of being able to adapt to panels of different sizes and specifications when combined with the main chassis, it reduces the number of parts, reduces development costs, effectively improves the versatility of the product, and makes the product more flexible in use and installation.

[0026] In addition, due to the use of a transfer pipe, the air inlet and the connecting hole are respectively located on the two surfaces of the main case. In this way, the switching baffle is set perpendicular to the bottom surface of the main case. In the blowing mode, the wind blows directly to the heating element for heating and then enters the transfer pipe. When the air flows to the switching baffle, it turns and flows in the direction tangent to the switching baffle and the arc surface of the air duct. The gas flow is smoother, the wind efficiency loss is small, the heating efficiency is high, and the product performance is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a structural diagram of a blowing device in one embodiment of the present utility model;

[0029] Figure 2 This is a schematic structural diagram of a blowing device in another embodiment of the present invention.

[0030] Figure 3 It is a structural diagram of a bathroom heater in the prior art;

[0031] Figure 4 This is a structural diagram of the main box and the transfer pipe in one embodiment of the present utility model;

[0032] Figure 5 This is a cross-sectional view of the main box and the adapter pipe in cooperation with each other in one embodiment of the present invention (ventilation mode);

[0033] Figure 6 This is a cross-sectional view of the main box and the adapter pipe in cooperation with each other in one embodiment of the present utility model (blowing mode);

[0034] Figure 7 This is a top view of the main box and the adapter pipe in another embodiment of the present invention;

[0035] Figure 8 This is a structural diagram of a main chassis in one embodiment of the present utility model;

[0036] Figure 9 This is a structural diagram of a transfer pipe in one embodiment of the present utility model;

[0037] in addition, Figure 1 The arrows in the middle show the direction of air flow. DETAILED DESCRIPTION

[0038] The embodiment of the present application provides a blowing device to solve the technical problem in the prior art that the main box of the bathroom heater cannot flexibly adapt to panels of various specifications and sizes to be compatible with different product appearances and installation environments, and has poor versatility.

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] like Figure 2 As shown in Figure 3, one or more embodiments of the present application provide a blowing device, including a main case 100 and panels 200a, 200b for covering the openings of the main case 100. When in use, the panels 200a, 200b face the user and have a decorative effect. At the same time, air inlets 210a, 210b and blowing outlets 220a, 220b are also provided on the panels 200a, 200b. When in use, the air in the room is sucked into the main case 100 through the air inlets 210a, 210b, and then blown into the room through the blowing outlets 220a, 220b.

[0041] like Figures 4 to 8 As shown, the main case 100 includes the above-mentioned opening and a bottom plate 170 opposite to the opening. The bottom plate 170 is surrounded by side walls 160. The side walls 160 are perpendicular to the bottom plate 170, and the bottom plate 170 and the side walls 160 enclose an installation space. For example, the main case 100 can be in the shape of a rectangular body. A volute 120 and a fan 110 disposed in the volute 120 are provided in the installation space. The fan 110 is connected to a motor. The volute 120 is formed with a volute inlet connected to the air inlets 210a and 210b on the panels 200a and 200b, and a volute air duct 121. The fan 110 rotates under the drive of the motor, agitating air flow, forcing indoor air to enter the volute air duct 121 from the air inlets 210a and 210b on the panels 200a and 200b and the volute inlet in sequence.

[0042] like Figures 4 to 7 、 Figure 9 As shown, the volute air duct 121 extends to one side wall 160 of the main box 100 to form a connecting hole 123, and the connecting hole 123 is detachably connected to the adapter pipe 300a, 300b. When the adapter pipe 300a, 300b is connected to the side of the main box 100, the adapter pipe 300a, 300b is connected to the connecting hole 123 of the volute air duct 121, and the adapter pipe 300a, 300b corresponds to the blowing port 220a, 220b on the panel 200a, 200b. Air outlets 310a and 310b are provided, and the air outlets 310a and 310b are coplanar or parallel to the opening, so that the adapter pipes 300a and 300b and the main box 100 can share the same panel 200a and 200b. At the same time, the wind in the volute air duct 121 can be blown into the room in sequence from the connecting hole 123 of the volute air duct 121, the air outlets 310a and 310b on the adapter pipes 300a and 300b and the blowing ports 220a and 220b on the panels 200a and 200b.

[0043] Since the adapter pipes 300a and 300b are parts that are independently set up from the main case 100 and are detachably connected to the main case 100, multiple adapter pipes 300a and 300b with air outlets 310a and 310b of different relative positions (relative to the air inlets 210a and 210b), sizes and shapes can be set to match panels 200a and 200b of different specifications and sizes to be compatible with different product appearances and installation environments.

[0044] For example, in one embodiment of the present application, Figure 2 As shown, when the panel is a linear panel 200a, the linear panel 200a is in a long strip shape, and is provided with an air outlet 220a and an air inlet 210a extending along the length direction of the linear panel 200a. The air outlet 220a and the air inlet 210a are in a long slot shape, and are located on the same straight line, forming a linear distribution. Correspondingly, as shown in FIG. Figure 2 、 Figures 4-6 、 Figure 9 As shown, the adapter pipe 300a extends along the length direction of the main box 100, and the air outlet 310a also extends along the length direction of the main box 100, and is located on the same straight line as the volute inlet, and is linearly distributed to match the air outlet 220a and the air inlet 210a of the linear panel 200a.

[0045] For example, in another embodiment of the present application, Figure 3 As shown, when the panel is a rectangular panel 200b of 300mm×600mm, it is provided with a rectangular blowing port 220b whose length extends along the width direction of the rectangular panel 200b, and a rectangular air inlet 210b whose length extends along the width direction of the rectangular panel 200. Correspondingly, as shown in FIG. Figure 3 、 7 As shown, the adapter pipe 300b extends along the width direction of the main chassis 100, and the air outlet 310b thereon also extends along the width direction of the main chassis 100 to match the air outlet 220b on the rectangular panel 200b.

[0046] It can be seen that since the adapter pipes 300a and 300b themselves have a simple structure and small size, and can be used with the main box 100 to adapt to panels 200a and 200b of different sizes and specifications, the types of parts are reduced, the development cost is reduced, the versatility of the product is effectively improved, and the product use and installation are more flexible.

[0047] When the hair dryer is used in a bathroom heater, Figure 2 、 3As shown, the panels 200a and 200b extend from the main case 100 to the adapter pipes 300a and 300b, and the air inlets 210a and 210b and the air outlets 220a and 220b on the panels 200a and 200b are respectively aligned with the volute inlet on the main case 100 and the air outlets 310a and 310b on the adapter pipes 300a and 300b.

[0048] In addition, if Figure 5 、 6 As shown, a heating element 180 is fixedly provided on the inner side of the connecting hole 123, that is, the heating element 180 is located in the main chassis 100 to heat the air flowing from the connecting hole 123 to the adapter pipes 300a and 300b in the blowing mode to form a warm air mode.

[0049] like Figures 4 to 8 As shown, the volute air duct 121 extends toward the adjacent side wall 160 of the main case 100 where the communication hole 123 is located to form a ventilation port 130 exposed to the main case 100 .

[0050] like Figures 4 to 8 As shown, a switching baffle 140 is further provided between the communicating hole 123 and the ventilation port 130. The switching baffle 140 is rotatably arranged in the volute air duct 121, and when the switching baffle 140 is rotated to the first position, the switching baffle 140 blocks and isolates the communicating hole 123, and the volute air duct 121 is only connected to the ventilation port 130, and the bathroom heater is in the ventilation mode. Figure 5 As shown; when the switching baffle 140 is rotated to the second position, the switching baffle 140 blocks and isolates the ventilation port 130, and the volute air duct 121 is only connected to the adapter pipes 300a and 300b through the connecting hole 123, and the bathroom heater is in the blowing mode, as shown Figure 6 shown.

[0051] Specifically, in ventilation mode, Figure 5 As shown, the fan 110 is working, and the wind enters the volute duct 121 from the air inlets 210a and 210b on the panels 200a and 200b, rotates, and finally flows out from the ventilation port 130, which is connected to the outside to realize the ventilation function. Figure 6 As shown, when the fan 110 is working, the wind enters the volute air duct 121 from the air inlets 210a and 210b on the panels 200a and 200b and rotates, then enters the adapter pipes 300a and 300b through the connecting holes 123, and finally blows out through the air outlets 310a and 310b on the adapter pipes 300a and 300b and the blowing ports 220a and 220b on the panels 200a and 200b in turn, thereby realizing the blowing function.

[0052] In the prior art, Figure 1As shown, since the air blowing port 4 and the air inlet 3 are both located on the opposite side of the bottom surface of the main case 1, the air duct switching baffle 6 is arranged parallel to the bottom surface of the main case 1. In the blowing mode, the wind needs to pass through the air duct switching baffle 6 located in the ventilation channel and turn before it can flow to the heating element 5 for heating, which increases the loss of wind pressure and reduces the heating efficiency.

[0053] In the embodiment of the present application, Figures 5-7 As shown, due to the use of adapter pipes 300a and 300b, the central axes of the air inlets 210a and 210b and the connecting hole 123 are perpendicular to each other (in the embodiment of the present application, the side wall of the connecting hole 123 is perpendicular to the top surface of the opening). In this way, the switching baffle 140 is arranged perpendicular to the bottom surface of the main chassis 100. In the blowing mode, the wind blows directly to the heating element 180 for heating and then enters the adapter pipes 300a and 300b. When the air flows to the switching baffle 140, it turns to flow in the direction tangent to the switching baffle 140 and the arc surface of the air duct. The gas flow is smoother, the wind efficiency loss is small, the heating efficiency is high, and the product performance is guaranteed.

[0054] Further, such as Figure 5 、 6 As shown, one side of the switching baffle 140 is fixed on the motor shaft of the motor, and the motor shaft is arranged perpendicular to the bottom surface of the main chassis 1. When the motor shaft rotates forward and reverse, it drives the switching baffle 140 to rotate forward and reverse, thereby switching between the blowing mode and the ventilation mode.

[0055] like Figures 4-6 As shown, one end of the adapter pipes 300a, 300b connected to the connecting hole 123 on the main chassis 100 is a bell mouth 320 to increase the air outlet efficiency.

[0056] The adapter pipes 300a, 300b are snap-connected to the main chassis 100. Figure 9 As shown, the upper edges of the end surfaces of the adapter pipes 300a and 300b are provided with an upwardly extending first buckle 311a, and the inner sides of the corresponding lower edges are provided with a first buckle groove 312a. A second buckle groove is provided on the open end surface of the main chassis 100, corresponding to the first buckle 311a, and a second buckle is provided on the inner side of the communication hole 123, corresponding to the first buckle groove 312a. When the adapter pipes 300a and 300b are assembled on the main chassis 100, the second buckle fastens in the first buckle groove 312a, and the first buckle 311a fastens in the second buckle groove, thereby achieving a detachable connection between the adapter pipes 300a and 300b and the main chassis 100.

[0057] Of course, the adapter pipes 300a, 300b and the main case 100 can also be detachably connected in other ways. For example, a plurality of clamping columns are arranged at intervals on the end faces of the adapter pipes 300a, 300b, and a plurality of clamping holes are correspondingly arranged on the main case 100. The adapter pipes 300a, 300b and the main case 100 are detachably connected by clamping the clamping columns into the clamping holes.

[0058] The main box 100 is provided with a first connection structure for connecting to the panels 200a and 200b, and the adapter pipes 300a and 300b are provided with a second connection structure for connecting to the panels 200a and 200b, so that the panels 200a and 200b are fixed to the main box 100 and the adapter pipes 300a and 300b.

[0059] For example, in one embodiment of the present application, Figure 2 As shown, when the panels 200a and 200b are linear panels 200a, the first connection structure includes a mounting rail 400 screwed and fixed on the open end face of the main chassis 100, and a card slot is provided on the mounting rail 400. The back of the linear panel 200a is provided with a rib, and the linear panel 200a is fixed in the card slot on the mounting rail 400 by the rib snap-on.

[0060] The second connection structure is a connection block 330a arranged on the end of the adapter pipe 300a away from the main box 100, the connection block 330a is higher than the air outlet 310a, and the connection block 330a is provided with a screw hole 331a for screwing the mounting rail 400, the mounting rail 400 extends to the connection block 330a and is screwed and fixed to the connection block 330a, the linear panel 200a is fixed on the mounting rail 400 and extends to the adapter pipe 300a.

[0061] For example, in one embodiment of the present application, Figure 3 As shown, when the panels 200a and 200b are rectangular panels 200b, the first connection structure includes a positioning groove provided on the open end surface of the main chassis 100, and a positioning block is provided on the back of the panel 200b. The rectangular panel 200b is fixed in the positioning groove on the main chassis 100 by the positioning block;

[0062] The second connection structure is a embedding groove 330b arranged on the top surface of the adapter pipe 300b, and a molding strip is provided on the back of the rectangular panel 200b. The rectangular panel 200b extends to the adapter pipe 300b, and the rectangular panel 200b is fixed in the embedding groove 330b on the adapter pipe 300b through the molding strip.

[0063] It should be noted that the fan 110 may also be other aerodynamic devices such as a wind wheel. In addition, for the convenience of description, this application is described with the panels 200a and 200b on top and the main box 200 on the bottom.

[0064] It should be understood that although the terms "first," "second," and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the exemplary embodiments.

[0065] The terms "outer," "middle," "inner," and so on, mentioned or possibly mentioned in this specification, are defined relative to the configurations shown in the accompanying drawings. They are relative concepts and may vary depending on the location or usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0066] The above description is only a preferred embodiment of the present application and does not limit the present application in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present application, and these improvements and supplements should also be regarded as the scope of protection of the present utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the present application, which are all equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present application are still within the scope of the technical solution of the present application.

Claims

1. A blowing device, characterized in that: It includes a main box and a panel, the top surface of the main box is open, and the panel is provided with an air inlet and an air outlet; An air dynamic device is provided in the main box, a first side wall of the main box is connected to a transfer pipe, the transfer pipe is in communication with the main box, and an air outlet is provided on the transfer pipe; A ventilation port is provided on the second side wall of the main chassis, and a switching baffle is provided between the ventilation port and the transfer pipe. The switching baffle is rotatably arranged in the main chassis to enable the main chassis to alternately connect the air outlet and the ventilation port; The panel covers the main case and the adapter pipe, and the air inlet thereon is connected with the main case through the opening to inhale air under the action of the aerodynamic device, and the air blowing port thereon is connected with the air outlet so that the air inhaled into the main case is blown out from the air outlet and the air blowing port, or the air inhaled into the main case is blown out from the ventilation port.

2. A blowing device according to claim 1, characterized in that: The rotating shaft of the switching baffle is perpendicular to the bottom surface of the main chassis.

3. A blowing device according to claim 2, characterized in that: The main box is provided with a volute, the aerodynamic device is arranged in the volute, and the volute is formed with a volute air duct connected to the air inlet; The volute air duct extends to the first side wall to form a communication hole, and the transfer pipe is connected to the volute air duct through the communication hole; The aerodynamic device forces air to enter the transfer duct from the air inlet and the volute air duct in sequence.

4. A blowing device according to claim 3, characterized in that: The second side wall is adjacent to the first side wall, the ventilation port is connected to the volute air duct, and the switching baffle is arranged between the communication hole and the ventilation port, and the switching baffle is rotatably arranged in the volute air duct; When the switching baffle rotates to the first position, the switching baffle blocks and isolates the connecting hole, and the volute air duct is connected to the ventilation port; when the switching baffle rotates to the second position, the switching baffle blocks and isolates the ventilation port, and the volute air duct is connected to the transfer pipe through the connecting hole.

5. A blowing device according to claim 4, characterized in that: The rotating shaft of the switching baffle is the motor shaft of the motor, and the motor shaft is perpendicular to the bottom surface of the main chassis. One side of the switching baffle is fixed on the motor shaft. When the motor shaft rotates, it drives the switching baffle to rotate.

6. A blowing device according to claim 3, characterized in that: The transfer pipe is detachably connected to the main chassis.

7. A blowing device according to claim 6, characterized in that: The adapter pipe is connected to the main chassis by a buckle, and a first buckle head extending upward is provided on the upper edge of the end face of the adapter pipe, and a first buckle groove is provided on the opposite lower edge; A second buckle groove is provided on the end surface of the main chassis opening corresponding to the first buckle head, and a second buckle head is provided on the inner side of the communicating hole corresponding to the first buckle groove; When the adapter pipe is assembled on the main chassis, the first buckle is fastened in the second buckle groove, and the second buckle is fastened in the first buckle groove.

8. A blowing device according to claim 3, characterized in that: One end of the transfer pipe connected to the communicating hole on the main chassis is a bell mouth.

9. A blowing device according to claim 1, characterized in that: The transfer pipe extends along the length direction of the main box, and the air outlet extends along the length direction of the main box; The adapter pipe and the main box are connected to the panel through a mounting rail. A connecting block is provided at one end of the adapter pipe away from the main box. The connecting block is higher than the air outlet, and the connecting block, the main box and the mounting rail are fixedly connected. The panel is fixed on the mounting rail.

10. The blowing device according to claim 1, characterized in that: The adapter pipe extends along the width direction of the main box, and the air outlet extends along the width direction of the main box; the adapter pipe and the main box are fixed to the panel by buckles.

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