Air supply device

Abstract

The utility model discloses an air supply device. The air supply device comprises a frame body forming an outer contour; the air inlet, the first air outlet and the second air outlet are formed in the frame body; the snail shell is arranged in the frame body and communicates with the first air outlet and the second air outlet, and the snail shell comprises a tongue part; the fan blades are arranged in the snail shell; the air path switching part is arranged on the upstream side of the first air outlet and the upstream side of the second air outlet, under the state that the air path switching part shields the first air outlet, a first tangent line tangent to the tongue part and the fan blades and the air path switching part intersect at an intersection point, the intersection point and the air path switching part are tangent to a second tangent line, and a first included angle is formed between the first tangent line and the second tangent line; the first flow deflector comprises a first end close to the tongue part, and a second included angle is formed between an extension surface, extending towards one side of the tongue part, of the first end and the first tangent line; the second angle is smaller than the first angle. According to the air supply device, the first flow deflector is arranged, so that the air supply effect towards the first air outlet or the second air outlet is improved, and meanwhile noise reduction is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to an air supply device. Background Art

[0002] An air supply device with more than two air outlets usually includes a fan blade, a first air outlet, a second air outlet, and an air path switching unit arranged on the upstream side of the first air outlet and the second air outlet. The air path switching unit switches the air path by shielding one of the air outlets. When the air path switching unit shields the first air outlet, the air blown out from the fan blade is blown toward the second air outlet under the guidance of the air path switching unit. Similarly, when the air path switching unit shields the second air outlet, the air blown out from the fan blade is blown toward the first air outlet under the guidance of the air path switching unit. Thereby, air is supplied to different air outlets.

[0003] In the air supply device as described above, after the air is blown out from the fan blades, it hits the wind path switching part at high speed, thereby achieving a turn. However, due to the high wind speed, the air will generate turbulence after hitting the wind path switching part, resulting in a loss of air volume and possible noise. Utility Model Content

[0004] In order to solve the above-mentioned problems, the utility model provides an air supply device, which improves the air supply effect to the first air outlet or the second air outlet by setting a first guide plate, and is also helpful to reduce noise.

[0005] The air supply device proposed by the utility model comprises:

[0006] The frame forms the outer contour;

[0007] An air inlet, used for supplying air into the frame;

[0008] A first air outlet is provided on the frame body and is used for exhausting the air in the frame body;

[0009] A second air outlet is provided on the frame body and is used to discharge the air in the frame body;

[0010] A snail shell, disposed in the frame, connected to the first air outlet and the second air outlet, the snail shell comprising a tongue;

[0011] A fan blade is arranged in the snail shell;

[0012] an air path switching portion, disposed on an upstream side of the first air outlet and the second air outlet, the air path switching portion comprising an air guide surface facing the upstream side of the air path switching portion;

[0013] Features:

[0014] The first air outlet is further away from the opposite side of the tongue portion than the second air outlet;

[0015] When the air path switching unit shields the first air outlet,

[0016] At the same time, a first tangent line tangent to the tongue and the fan blade intersects the air path switching portion at an intersection, the intersection and the air path switching portion are tangent to a second tangent line, and the first tangent line and the second tangent line form a first angle;

[0017] The air path switching portion further includes a first guide plate, the first guide plate includes a first end close to the tongue portion, and an extension surface of the first end extending toward one side of the tongue portion forms a second angle with the first tangent line;

[0018] The second angle is smaller than the first angle.

[0019] In some optional embodiments, the first guide plate includes a first windward surface close to the upstream side of the wind path switching portion; at least a portion of the first windward surface is a curved surface.

[0020] In some optional embodiments, at least a portion of the wind guide surface is a curved surface; the curved surface on the first windward surface is concentrically arranged with the curved surface on the wind guide surface.

[0021] In some optional embodiments, the first guide vane also includes a second end opposite to the first end and away from the tongue; the air path switching portion also includes a second guide vane; and the second guide vane extends from the second end to a side away from the first end.

[0022] In some optional embodiments, the second guide plate includes a third end connected to the second end, and a fourth end opposite to the third end and away from the second end; an extension surface of the second guide plate extending toward one side of the fourth end is perpendicular to the plane where the second air outlet is located.

[0023] In some optional embodiments, the air path switching part also includes: a rotating shaft and a connecting plate; the rotating shaft is used to drive the air guide surface to rotate; the connecting plate is used to connect the rotating shaft and the air guide surface; the connecting plate includes a first edge close to the first end, and a second edge close to the fourth end; the rotating shaft is located on the side of the first guide plate away from the air guide surface; on the arc with the rotating shaft as the center and passing through the fourth end, the arc length from the fourth end to the first edge is greater than one third of the arc length.

[0024] In some optional embodiments, the arc length from the fourth end to the first side is less than two-thirds of the arc length.

[0025] In some optional embodiments, the first guide plate further includes a first leeward surface facing the wind guide surface; at least a portion of the first leeward surface is a curved surface.

[0026] In some optional embodiments, the surface of the second guide vane close to the upstream side of the air path switching portion is a plane.

[0027] In some optional embodiments, a heating unit is provided on the upstream side of the first guide vane.

[0028] The air supply device of the utility model is provided with a first guide vane on the upstream side of the air guide surface. When supplying air toward the second air outlet, a part of the airflow blown out from the fan blades hits the first guide vane. Under the guidance of the first guide vane, the airflow can be blown more smoothly toward the direction of the first air outlet, thereby preventing the airflow from directly hitting the air guide surface at a large angle to cause turbulence and generate noise, and ensuring that the airflow can be blown smoothly toward the second air outlet. When supplying air toward the first air outlet, the airflow is blown toward the side away from the second air outlet under the guidance of the first guide vane, thereby suppressing the phenomenon that the wind speed at the first air outlet is reduced due to uneven wind speed. Through the guiding effect of the first guide vane, the air supply effect to the first air outlet or the second air outlet is improved, and at the same time it is beneficial to reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the air supply device of an embodiment of the utility model;

[0030] Figure 2 This is one of the internal structure schematic diagrams of the air supply device of an embodiment of the utility model;

[0031] Figure 3 This is a second schematic diagram of the internal structure of the air supply device of an embodiment of the utility model;

[0032] Figure 4 This is a partial structural schematic diagram of the air path switching part of an embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of the air flow of the air supply device of the embodiment of the utility model when the air supply device is in a state of supplying air to the second air outlet;

[0034] Figure 6 It is a schematic diagram of air flow when the air supply device of an embodiment of the utility model is in a state of supplying air to the first air outlet.

[0035] Reference numerals:

[0036] Frame 1, air inlet 11, first air outlet 12, second air outlet 13, snail shell 2, tongue 21, fan blades 3, wind path switching part 4, rotating shaft 41, air guide plate 42, air guide surface 421, first guide plate 43, first windward surface 431, first leeward surface 432, first end 433, second end 434, second guide plate 44, third end 441, fourth end 442; connecting plate 45. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0038] The following orientation or positional relationship is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present disclosure. Specifically, relative to the above, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0040] The utility model provides an air supply device. Figures 1 to 6 The air supply device of the utility model is described in detail.

[0041] Figure 1 This is a schematic diagram of the structure of the air supply device of an embodiment of the utility model; Figure 2 This is one of the internal structure schematic diagrams of the air supply device of an embodiment of the utility model; Figure 3 This is a second schematic diagram of the internal structure of the air supply device of an embodiment of the utility model; Figure 4 It is a schematic diagram of the partial structure of the air duct switching part of an embodiment of the utility model.

[0042] The air supply device disclosed in this embodiment is described below. In the following embodiment, for the convenience of description, the state in which the air path switching part 4 shields the first air outlet 12 is described.

[0043] The present embodiment discloses an air supply device, which includes a frame 1, a snail shell 2, fan blades 3 and an air path switching part 4, wherein the frame 1 forms an outer contour; an air inlet 11 is used for supplying air into the frame 1; a first air outlet 12 is provided on the frame 1, and is used for discharging the air in the frame 1 to a first space; a second air outlet 13 is provided on the frame 1, and is used for discharging the air in the frame 1 to a second space; the snail shell 2 is provided in the frame 1, and is connected to the first air outlet 12 and the second air outlet 13, and the snail shell 2 includes a tongue 21; the fan blades 3 are provided in the snail shell 2; the air path switching part 4 is provided on the upstream side of the first air outlet 12 and the second air outlet 13, and the air path switching part 4 includes a wind guide surface 421 facing the upstream side of the air path switching part 4.

[0044] The first air outlet 12 is farther away from the opposite side of the tongue 21 than the second air outlet 13; when the air path switching part 4 covers the first air outlet 12, a first tangent that is tangent to the tongue 21 and the fan blade 3 intersects with the air path switching part 4 at an intersection, and the intersection is tangent to the air path switching part 4 at a second tangent, and the first tangent and the second tangent form a first angle.

[0045] The air path switching part 4 also includes a first guide plate 43, which includes a first end 433 close to the tongue 21, and an extension surface of the first end 433 extending toward one side of the tongue 21 forms a second angle with the first tangent; the second angle is smaller than the first angle.

[0046] Specifically, the air supply device includes a frame 1, an air inlet 11, an air outlet, and an air supply unit.

[0047] The frame 1 forms the outer contour of the air supply device and is approximately in the shape of a hollow cuboid, including a frame top surface, a frame bottom surface located at the frame top surface, and a frame side surface connecting the frame top surface and the frame bottom surface.

[0048] The air inlet 11 is provided on the frame 1 and is an opening for air to enter the frame 1. In this embodiment, the air inlet 11 is provided on the side of the frame, and in other embodiments, the air inlet 11 may also be provided on the top surface or the side of the frame.

[0049] The air outlet is provided on the frame 1, and is an opening for blowing air out of the frame 1. In the present embodiment, the air outlet includes a first air outlet 12 and a second air outlet 13. The first air outlet 12 and the second air outlet 13 are connected to the first space and the second space respectively, for example, they are connected to the indoor space and the outdoor space respectively, or they are connected to two indoor spaces respectively, or they can be connected to different areas of the same space. In the present embodiment, the first air outlet 12 is connected to the indoor space, and the second air outlet 13 is connected to the outdoor space. The air in the frame 1 is blown indoors through the first air outlet 12, and is blown outdoors through the second air outlet 13.

[0050] In this embodiment, a heating unit for heating air is provided on the upstream side of the first air outlet 12 .

[0051] The air supply unit is disposed in the frame 1 and is used to blow air from the air inlet 11 to the air outlet. The air supply unit includes a spiral shell 2, fan blades 3 and an air path switching part 4.

[0052] The snail shell 2 is arranged in the frame 1, connecting the air inlet 11 with the first air outlet 12 and the second air outlet 13. The snail shell 2 includes a snail shell top surface provided with a snail shell air inlet connected to the air inlet 11, a snail shell bottom surface arranged on the opposite side of the snail shell top surface, and a snail shell side surface connecting the snail shell top surface and the snail shell bottom surface. The edge of one side of the snail shell top surface, the snail shell bottom surface and the snail shell side surface constitutes a snail shell air outlet connecting the first air outlet 12 and the second air outlet 13. In this embodiment, the snail shell air outlet is directly connected to the first air outlet 12 and the second air outlet 13. In other embodiments, the snail shell air outlet can also be indirectly connected to the first air outlet 12 and the second air outlet 13. The so-called indirect connection means that the snail shell air outlet is not connected to the first air outlet 12 and the second air outlet 13, and other components are also provided in between.

[0053] The fan blade 3 is arranged in the snail shell 2, and is used to blow air from the air inlet 11 to the snail shell air outlet. The air supply unit also includes a motor for controlling the rotation of the fan blade 3, and a rotating shaft connecting the fan blade 3 and the motor. In this embodiment, the fan blade 3 is a centrifugal fan blade, including a fan blade air inlet perpendicular to the rotating shaft, and a fan blade air outlet surrounding the rotating shaft and parallel to the rotating shaft.

[0054] The side of the snail shell is provided with a tongue portion 21 which is the shortest distance from the axis of the blade 3. The so-called distance refers to the straight-line distance between the tongue portion 21 and the axis of the blade.

[0055] The plane where the first air outlet 12 is located and the plane where the second air outlet 13 is located are both arranged parallel to the rotation axis of the fan blade 3. In this embodiment, the first air outlet 12 and the second air outlet 13 are arranged on the side of the frame and are located in the same plane. In other embodiments, the planes where the first air outlet 12 and the second air outlet 13 are located can be arranged in parallel or intersectingly. For example, the plane where the first air outlet 12 is located and the plane where the second air outlet 13 is located are arranged to intersect vertically.

[0056] Furthermore, the first air outlet 12 is further away from the opposite side of the tongue portion 21 than the second air outlet 13. That is, when the rotation direction of the fan blade 3 is from the tongue portion 21 to the opposite side of the tongue portion 21, in this embodiment, when viewed from the opposite side of the fan blade 3 where the motor is provided to the side where the motor is provided, the fan blade 3 rotates in a clockwise direction, and the first air outlet 12 is on the downstream side of the second air outlet 13 in the clockwise direction.

[0057] The air path switching part 4 is located on the upstream side of the first air outlet 12 and the second air outlet 13, and is used to blow the air in the frame 1 to the first air outlet 12 or the second air outlet 13, or to blow the air in the frame 1 to the first air outlet 12 and the second air outlet 13 at the same time. In this embodiment, the air path switching part 4 is arranged in the snail shell 2. In other embodiments, the air path switching part 4 can also be arranged outside the snail shell 2, for example, it is arranged on the upstream side of the first air outlet 12 and the second air outlet 13, and is located on the downstream side of the air outlet of the snail shell 2.

[0058] The air path switching part 4 includes an air guide piece 42 for shielding the first air outlet 12 or the second air outlet 13, and a rotating shaft 41 for rotating the air guide piece 42. In the present embodiment, the air guide piece 42 is arranged perpendicular to the bottom surface of the snail shell, and the air guide piece 42 includes an air guide surface 421 facing the upstream side of the air path switching part 4. At least a part of the air guide surface 421 is a curved surface. In the present embodiment, when viewed from the top surface of the snail shell to the bottom surface of the snail shell, the air guide piece 42 is in a semicircular arc shape, and the air guide surface 421 is a curved surface. The rotating shaft 41 is arranged on the upstream side of the air guide surface 421.

[0059] The air path switching part 4 also includes a connecting piece 45, which is arranged parallel to the bottom surface of the snail shell, and the connecting piece 45 is arranged in close contact with the bottom surface of the snail shell. The connecting piece 45 includes a first side and a second side, the first side is a side of the connecting piece 45 connecting the side of the wind guide surface 421 close to the tongue 21 and the rotating shaft 41, and the second side is a side of the wind guide surface 421 away from the tongue 21 and the rotating shaft 41. In this embodiment, the connecting piece 45 is fan-shaped, and the central angle is close to 90 degrees.

[0060] In other embodiments, the air guide piece 42 may also be a flat sheet, the air guide surface is flat, the rotating shaft 41 is located on the upstream side of the air guide piece 42, and the rotating shaft 41 is located between the first air outlet 12 and the second air outlet 13. The air guide piece 42 and the rotating shaft 41 may both be connected to the connecting piece 45, a motor is provided on the top surface of the snail shell, the rotating shaft 41 is connected to the driving shaft of the motor, the motor drives the rotating shaft 41 to rotate, the rotating shaft 41 rotates to drive the connecting piece 45 to rotate, and the connecting piece 45 drives the air guide piece 42 to rotate.

[0061] The air path switching portion 4 further includes a first guide plate 43, the first guide plate 43 is located between the guide plate 42 and the rotating shaft 41, and the rotating shaft 41 is located on the side of the first guide plate 43 away from the wind guide surface 421. In this embodiment, the first guide plate 43 is arranged on the connecting plate 45, and the first guide plate 43 has a first end 433 close to the tongue portion 21 and a second end 434 away from the tongue portion 21, and the first guide plate 43 includes a first windward surface 431 and a first leeward surface 432.

[0062] The first windward surface 431 is a surface of the first guide vane 43 close to the upstream side of the air path switching portion 4 , that is, when air blows toward the first guide vane 43 , it will hit the first windward surface 431 .

[0063] The first leeward surface 432 is a surface of the first guide plate 43 that is located opposite to the first windward surface 431 , that is, the first leeward surface 432 faces the downstream side of the air path switching unit 4 .

[0064] The first end 433 is an end of the first guide plate 43 close to the tongue 21 , and the second end 434 is an end of the first guide plate 43 away from the tongue 21 . The second end 434 is located opposite to the first end 433 .

[0065] When the air path switching unit 4 shields the first air outlet 12 , the air guide piece 42 shields the first air outlet 12 .

[0066] When the air path switching part 4 covers the first air outlet 12, a tangent line that is tangent to the surface of the tongue 21 and the circumferential surface of the fan blade 3 is defined as a first tangent line. The first tangent line intersects the air path switching part 4 at an intersection point. The so-called intersection with the air path switching part 4 means that the first tangent line intersects with the air guide surface 421 on the air path switching part 4.

[0067] The intersection point is tangent to the air path switching portion 4 at a second tangent line, that is, the tangent line at which the intersection point is tangent to the air guide plate 42 is the second tangent line, and the angle formed between the first tangent line and the second tangent line is the first angle.

[0068] The extension surface extending from the first end 433 of the first guide plate 43 toward one side of the tongue portion 21 forms a second angle with the first tangent line. The extension line of the first guide plate 43 extending toward the first end 433 is located within the extension surface. The so-called extension line of the first guide plate 43 extending toward the first end 433, in this embodiment, refers to a line passing through the first end 433 and tangent to the first windward surface 431. When the first windward surface 431 is a plane, the extension line refers to a ray extending from one side of the first end 433.

[0069] The second angle is smaller than the first angle.

[0070] The following describes a mode in which the air supply device supplies air to the second air outlet 13 .

[0071] The air guide plate 42 shields the first air outlet 12, and the first air guide plate 43 is located near the tongue portion 21. The air is blown out from the fan blade 3 and blown toward the air path switching portion 4 at high speed. Since the second angle formed by the extension line of the first air guide plate 43 extending to the first end 433 and the first tangent is smaller than the first angle formed by the air path switching portion 4 and the first tangent. A part of the airflow blown out from the fan blade 3 hits the first air guide plate 43 at a smaller angle, so that it can be guided by the first air guide plate 43 to blow more smoothly toward the first air outlet 12, preventing the airflow from directly hitting the air guide surface 421 at a larger angle, thereby causing turbulence and noise, and ensuring that the airflow on both sides of the first air guide plate 43 can flow smoothly to the second air outlet 13, which is beneficial to improve the air supply effect to the second air outlet 13.

[0072] The following describes a mode in which the air supply device supplies air to the first air outlet 12 .

[0073] The air guide plate 42 shields the second air outlet 13, and the first air guide plate 43 is located away from the tongue portion 21. The air is blown out from the fan blade 3, part of which is blown toward the first air outlet 12, and part of which is blown toward the second air outlet 13. Since the air guide plate 42 shields the second air outlet 13, part of the air hits the air guide plate 42. Since the air is blown out from the fan blade 3, it is blown from the second air outlet 13 to the first air outlet 12, so the wind speed of the airflow close to the tongue portion 21 is higher, and the wind speed of the airflow away from the tongue portion 21 is lower.

[0074] Due to the provision of the first guide plate 43, the air originally blown toward the side of the first air outlet 12 close to the second air outlet 13 is blown toward the side away from the second air outlet 13 under the guidance of the first windward surface 431 of the first guide plate 43, thereby suppressing the phenomenon of reduced wind speed at the first air outlet 12 due to uneven wind speed, which is beneficial to improving the air supply effect to the first air outlet 12.

[0075] In the embodiment of the present disclosure, a first guide vane 43 is provided on the upstream side of the wind guide surface 421, and when air is supplied toward the second air outlet 13, a part of the airflow blown out from the fan blade 3 hits the first guide vane 43, and the airflow can be more smoothly blown toward the first air outlet 12 under the guidance of the first guide vane 43, thereby preventing the airflow from directly hitting the wind guide surface 421 at a large angle to cause turbulence and generate noise, and ensuring that the airflow can be smoothly blown toward the second air outlet 13; when air is supplied toward the first air outlet 12, the airflow is blown toward the side away from the second air outlet 13 under the guidance of the first guide vane 43, thereby suppressing the phenomenon that the wind speed at the first air outlet 12 is reduced due to uneven wind speed, and the guiding effect of the first guide vane 43 is used to improve the air supply effect to the first air outlet 12 or the second air outlet 13, and at the same time it is beneficial to reduce noise.

[0076] In an optional embodiment, at least a portion of the first windward surface 431 is a curved surface. The so-called curved surface means that the first windward surface 431 is an arc with its center located on the upstream side of the air path switching part 4 when viewed from the top surface of the volute shell 2 to the bottom surface of the volute shell 2.

[0077] In an optional embodiment, at least a portion of the first leeward surface 432 is a curved surface.

[0078] Furthermore, in this embodiment, the curved surface on the first windward surface 431 and the curved surface on the wind guide surface 421 are arranged in a concentric state. The so-called concentric state means that the center of the arc of the curved surface of the first windward surface 431 is consistent with the center of the arc of the curved surface of the corresponding wind guide surface 421. The so-called corresponding curved surface means that the extension lines of the radii of the two ends of the arc of the curved surface of the first windward surface 431 intersect with the curved surface of the wind guide surface 421 and divide the corresponding arc line, which is the curved surface on the wind guide surface 421 corresponding to the first windward surface 431. Therefore, combined with the angle of the second angle of the first guide plate 43, the position of the first guide plate 43 can be determined.

[0079] Furthermore, in this embodiment, the air path switching portion 4 further includes a second guide plate 44. The second guide plate 44 is a sheet-shaped body extending from the second end 434 of the first guide plate 43 to a side away from the first end 433. The second guide plate 44 includes a third end 441 connected to the second end 434, and a fourth end 442 located on the opposite side of the third end 441 and away from the second end 434. The so-called extension to a side away from the first end 433 refers to the extension to a side of the second air outlet 13.

[0080] Further, in this embodiment, the extension surface of the second guide plate 44 extending toward the side of the fourth end 442 is perpendicular to the plane of the second air outlet 13, that is, the extension line of the second guide plate 44 extending toward the side away from the second end 434 is perpendicular to the plane where the second air outlet 13 is located. In addition, the surface of the second guide plate 44 close to the upstream side of the air path switching portion 4 is a plane. The so-called plane means that the second guide plate 44 is a straight line segment when viewed from the top surface of the snail shell to the bottom surface of the snail shell.

[0081] Furthermore, in this embodiment, on the arc with the rotating shaft 41 of the air path switching part 4 as the center and passing through the fourth end 442 of the second guide plate 44, the arc length from the fourth end 442 to the first side is greater than one third of the arc length of the arc.

[0082] Furthermore, in this embodiment, the arc length from the fourth end 442 to the first side is less than two-thirds of the arc length.

[0083] The specific implementation of this embodiment is described below.

[0084] Under the action of the air supply unit, air is sucked into the frame 1 from the air inlet 11, and then flows through the snail shell air inlet, the fan blade air inlet in sequence, and then blown out from the fan blade air outlet, and under the guidance of the snail shell 2, blown to the first air outlet 12 and the second air outlet 13.

[0085] Figure 5 It is a schematic diagram of air flow when the air supply device of an embodiment of the utility model is in a state of supplying air to the second air outlet.

[0086] The mode in which the air supply device supplies air to the second air outlet 13 is described in detail below.

[0087] The air path switch 4 is turned toward the first air outlet 12 under the action of the rotating shaft 41, the air guide 42 shields the first air outlet 12, and the first guide 43 is located near the tongue 21. The air is blown out from the fan blades 3 and blows toward the air path switch 4 at a high speed.

[0088] Since the first air outlet 12 is disposed closer to the tongue portion 21 than the second air outlet 13 , when the air path switching portion 4 shields the first air outlet 12 , the air path switching portion 4 is closer to the tongue portion 21 .

[0089] If the first guide plate 43 is not provided, when air blows toward the air path switching plate at high speed, the air velocity near the tongue portion 21 is relatively high, and the airflow with relatively high velocity flows through the tongue portion 21 and blows toward the side of the air path switching portion 4. The airflow may form turbulence after colliding with the side of the air path switching portion 4, and accumulate on the side of the air path switching portion 4, making it difficult to be guided to the second air outlet 13.

[0090] When the first guide plate 43 is set, since the second angle formed by the extension line of the first guide plate 43 extending to the first end 433 and the first tangent is smaller than the first angle formed by the air path switching part 4 and the first tangent, the angle at which a part of the airflow blown out from the fan blade 3 hits the first guide plate 43 is smaller. Therefore, under the guidance of the first guide plate 43, the airflow can be blown toward the first air outlet 12 more smoothly, preventing the airflow from directly hitting the air guide surface 421 at a large angle to cause turbulence and noise, and ensuring that the airflow on both sides of the first guide plate 43 can flow smoothly to the second air outlet 13, which is beneficial to improving the air supply effect.

[0091] When the second air outlet 13 is connected to the outside, the exhaust efficiency toward the outside is effectively improved to enhance the indoor and outdoor ventilation effects. When the second air outlet 13 is connected to the indoor, the air supply efficiency toward the indoor is effectively improved to enhance the indoor ventilation effect in the internal circulation mode.

[0092] Furthermore, since at least a portion of the first windward surface 431 on the first guide plate 43 is a curved surface, when air hits the curved surface on the first windward surface 431 , the air can be guided to blow toward the second air outlet 13 more smoothly.

[0093] In addition, since the curved surface of the first windward surface 431 and the curved surface of the wind guide surface 421 are arranged in a concentric state, after the airflow blown out from the fan blade 3 flows through the tongue portion 21, most of the airflow can be smoothly blown toward the second air outlet 13 under the guidance of the first windward surface 431, and the part of the airflow that does not flow through the first windward surface 431, because most of the airflow has been guided to the side of the second air outlet 13 through the first windward surface 431, the wind speed is reduced, thereby avoiding the high-speed airflow converging near the tongue portion 21 and forming turbulence.

[0094] Furthermore, when the air is directed by the first windward surface 431, it turns from the direction of blowing toward the first air outlet 12 to the second air outlet 13. Since the second guide plate 44 is connected to the second end 434 of the first guide plate 43 and extends toward the second air outlet 13, when the airflow flows to the second end 434 of the first guide plate 43, it can continue to blow toward the second air outlet 13 under the guidance of the second guide plate 44. This prevents the airflow from being disturbed by part of the airflow on the first leeward surface 432 of the first guide plate 43 when blowing toward the second end 434, thereby forming turbulence, thereby effectively avoiding the turbulence phenomenon.

[0095] Furthermore, the extension line of the second guide plate 44 toward the fourth end 442 is perpendicular to the plane where the second air outlet 13 is located. Thus, under the guidance of the second guide plate 44, the air can be blown toward the second air outlet 13 more smoothly, thereby improving the efficiency of ventilation and air supply.

[0096] Furthermore, since the arc length from the fourth end 442 on the second guide vane 44 to the first side is greater than one-third of the corresponding arc, it can prevent the airflow from being carried to the side of the first air outlet 12 by the airflow on the first leeward side 432 of the first guide vane 43 after being blown out along the second end 434 of the first guide vane 43, thereby ensuring that most of the airflow can still be blown out along the second guide vane 44 to the side of the second air outlet 13.

[0097] Figure 6 It is a schematic diagram of air flow when the air supply device of an embodiment of the utility model is in a state of supplying air to the first air outlet.

[0098] The mode in which the air supply device supplies air to the first air outlet 12 is described in detail below.

[0099] Under the action of the rotating shaft 41, the air path switching part 4 turns to the side of the second air outlet 13, the air guide plate 42 shields the second air outlet 13, and the first air guide plate 43 is located away from the tongue portion 21. The air is blown out from the fan blade 3, part of it blows to the first air outlet 12, and part of it blows to the second air outlet 13. Since the air guide plate 42 shields the second air outlet 13, part of the air hits the air guide plate 42. Since the air is blown out from the fan blade 3, it blows from the side of the second air outlet 13 to the side of the first air outlet 12, the wind speed of the airflow close to the side of the tongue portion 21 is higher, and the wind speed of the airflow away from the side of the tongue portion 21 is lower.

[0100] If the first guide plate 43 and the second guide plate 44 are not provided, the wind speed at the first air outlet 12 decreases due to uneven wind speed, and the airflow cannot be blown further after being blown out of the first air outlet 12, making it difficult to provide a better air supply effect for the user.

[0101] In the present embodiment, since the first guide vane 43 and the second guide vane 44 are provided, the air blown toward the wind path switching portion 4 is guided by the second guide vane 44, and the air originally blown toward the side of the first air outlet 12 close to the second air outlet 13 is guided by the first windward surface 431 of the first guide vane 43 and blown toward the side away from the second air outlet 13, thereby suppressing the phenomenon of reduced wind speed at the first air outlet 12 due to uneven wind speed, which is beneficial to improving the air supply effect.

[0102] Furthermore, the arc length from the fourth end 442 of the second guide vane 44 to the first side is set to be less than two-thirds of the corresponding arc, thereby ensuring that a portion of the air blown out from the fan blade 3 is divided into two airflows by the fourth end 442 under the guidance of the second guide vane 44, one portion of which is blown toward the first windward surface 431 of the first guide vane 43 along the side of the second guide vane 44 facing the upstream side of the wind path switching unit 4. The other portion of the airflow is blown toward the first leeward surface 432 of the first guide vane 43 along the other side of the second guide vane 44 facing away from the upstream side. Thereby, the airflow is blown toward the first air outlet 12 more evenly, thereby increasing the wind speed at the first air outlet 12, making the wind blow farther and improving the air supply efficiency. Similarly, turbulence caused by the excessive length of the second guide vane 44 is avoided.

[0103] In addition, in this embodiment, since a heating unit is provided on the upstream side of the first air outlet 12 , warm air can be provided to the room through the switching of the air path switching unit 4 .

[0104] Furthermore, in the present embodiment, since the first leeward surface 432 of the first guide plate 43 is a curved surface, when the wind path switching portion 4 blocks the first air outlet 12, the air flowing through the first leeward surface 432 can be guided toward the second air outlet 13 more smoothly; and when the wind path switching portion 4 blocks the second air outlet 13, the air flowing through the first leeward surface 432 can be guided toward the first air outlet 12 more smoothly.

[0105] So far, the embodiments of the present invention have been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the present invention.

[0106] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element are not limited to the various specific structures and shapes mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0107] Finally, it should be noted that 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air supply device, comprising: The frame forms the outer contour; An air inlet, used for supplying air into the frame; A first air outlet is provided on the frame body and is used for exhausting the air in the frame body; A second air outlet is provided on the frame body and is used to discharge the air in the frame body; A snail shell, disposed in the frame, connected to the first air outlet and the second air outlet, the snail shell comprising a tongue; A fan blade is arranged in the snail shell; an air path switching portion, disposed on an upstream side of the first air outlet and the second air outlet, the air path switching portion comprising an air guide surface facing the upstream side of the air path switching portion; Features: The first air outlet is further away from the opposite side of the tongue portion than the second air outlet; When the air path switching unit shields the first air outlet, At the same time, a first tangent line tangent to the tongue and the fan blade intersects the air path switching portion at an intersection, the intersection and the air path switching portion are tangent to a second tangent line, and the first tangent line and the second tangent line form a first angle; The air path switching portion further includes a first guide plate, the first guide plate includes a first end close to the tongue portion, and an extension surface of the first end extending toward one side of the tongue portion forms a second angle with the first tangent line; The second angle is smaller than the first angle.

2. The air supply device according to claim 1, characterized in that: The first guide plate includes a first windward surface close to the upstream side of the wind path switching portion; At least a portion of the first windward surface is a curved surface.

3. The air supply device according to claim 2, characterized in that: At least a portion of the wind guide surface is a curved surface; The curved surface on the first windward surface is concentrically arranged with the curved surface on the wind guiding surface.

4. The air supply device according to any one of claims 1 to 3, characterized in that: The first guide plate further includes a second end opposite to the first end and away from one side of the tongue portion; The air path switching portion further includes a second guide vane; The second guide plate extends from the second end to a side away from the first end.

5. The air supply device according to claim 4, characterized in that: The second guide plate includes a third end connected to the second end, and a fourth end opposite to the third end and away from the second end; An extension surface of the second guide plate extending toward one side of the fourth end is perpendicular to a plane where the second air outlet is located.

6. The air supply device according to claim 5, characterized in that: The air path switching part further includes: a rotating shaft and a connecting piece; The rotating shaft is used to drive the wind guide surface to rotate; The connecting piece is used to connect the rotating shaft and the wind guide surface; The connecting piece includes a first side close to the first end, and a second side close to the fourth end; The rotating shaft is located at a side of the first guide plate away from the wind guide surface; On the arc with the rotation axis as the center and passing through the fourth end, the arc length from the fourth end to the first side is greater than one third of the arc length.

7. The air supply device according to claim 6, characterized in that: The arc length from the fourth end to the first side is less than two-thirds of the arc length.

8. The air supply device according to any one of claims 5 to 7, characterized in that: The first guide plate further includes a first leeward surface facing the wind guide surface; At least a portion of the first leeward surface is a curved surface.

9. The air supply device according to claim 8, characterized in that: A surface of the second guide plate close to the upstream side of the air duct switching portion is a flat surface.

10. The air supply device according to claim 1, characterized in that: A heating unit is disposed on the upstream side of the first guide vane.

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