Ventilation device

Abstract

The utility model discloses an air interchanger which comprises a volute, the volute comprises a first volute and a second volute which are oppositely arranged, a first opening is formed in the bottom face of the first volute, and a second opening matched with the first opening is formed in the top face of the second volute. The first volute comprises a first sealing part and a first locking part, the first sealing part is arranged around the first opening, and the first locking part is arranged outside the first volute and is close to the first opening; the second volute comprises a second sealing part and a second locking part, the second sealing part is arranged around the second opening, and the second locking part is arranged outside the second volute and is close to the second opening; one of the first sealing part and the second sealing part covers the outer side of the other one, and the first sealing part and the second sealing part are attached to each other; and the first locking part and the second locking part are used for locking the first volute and the second volute in an assembly state. According to the air interchanger, airflow in the volute is effectively prevented from flowing out, and therefore the sealing performance of the air interchanger is guaranteed.

Description

Technical Field

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

[0002] In the ventilation device of the prior art, in order to facilitate the assembly of components such as fan blades and motors inside the ventilation device, the volute is usually assembled from an upper volute and a lower volute.

[0003] There will inevitably be a gap at the connection between the upper volute and the lower volute. When the ventilation device is in operation, the airflow in the volute can easily flow out through the gap. In order to ensure the sealing of the connection between the upper volute and the lower volute, sealing materials such as sponge or rubber are usually added to the connection in the prior art, and then the upper volute and the lower volute are assembled by buckles or screws. Pasting sealing materials will make the assembly process complicated, and the sealing materials are easily deformed under the action of external forces, making it difficult to ensure the sealing of the connection between the upper volute and the lower volute. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a ventilation device, which effectively prevents the airflow inside the volute from flowing out by forming a surface contact between the first sealing part and the second sealing part of the volute, thereby ensuring the sealing performance of the ventilation device.

[0005] The ventilation device proposed in the utility model comprises:

[0006] A volute, the volute comprising a first volute and a second volute arranged opposite to each other, the bottom surface of the first volute is configured with a first opening, and the top surface of the second volute is configured with a second opening matched with the first opening;

[0007] The first volute comprises a first sealing portion and a first locking portion, the first sealing portion is arranged around the first opening, and the first locking portion is arranged outside the first volute and close to the first opening;

[0008] The second volute comprises a second sealing portion and a second locking portion, the second sealing portion is arranged around the second opening, and the second locking portion is arranged outside the second volute and close to the second opening;

[0009] When the first volute and the second volute are assembled, one of the first sealing part and the second sealing part is covered on the outside of the other, and the first sealing part and the second sealing part are in contact with each other; the first locking part and the second locking part are used to lock the first volute and the second volute in an assembled state.

[0010] In some optional embodiments, the first sealing portion includes a first sealing edge, which is an inclined surrounding edge extending from the side of the first volute toward the outside of the first volute, and the first sealing edge includes a first sealing inner wall surface and a first sealing outer wall surface relative to each other; the second sealing portion includes a second sealing edge, which is an inclined surrounding edge extending from the side of the second volute toward the inside of the second volute, and the second sealing edge includes a second sealing inner wall surface and a second sealing outer wall surface relative to each other.

[0011] In some optional embodiments, the first sealing inner wall surface and the second sealing outer wall surface have the same inclination angle so that the first sealing inner wall surface fits the second sealing outer wall surface.

[0012] In some optional embodiments, the first sealing portion further includes a connecting surface, which is located at the end of the first sealing inner wall surface, and the connecting surface is perpendicular to the assembly direction of the first volute and the second volute; the second sealing portion further includes a receiving surface, which is located at the end of the second sealing outer wall surface, and the receiving surface is in contact with the connecting surface.

[0013] In some optional embodiments, the first sealing portion further includes a guide portion, wherein the guide portion is a curved edge extending from the first sealing edge in a vertical direction, and the vertical direction is the same as an assembly direction of the first volute and the second volute.

[0014] In some optional embodiments, the guide portion includes a guide inner wall, which is a side facing the interior of the first volute and is in contact with the side of the second volute, forming a bending structure with the connecting surface at the bottom of the first sealing inner wall.

[0015] In some optional embodiments, the guide portion further includes a guide surface, wherein the guide surface is a surface facing the interior of the first volute, and an inclination angle of the guide surface is consistent with an inclination angle of the first sealing inner wall surface.

[0016] In some optional embodiments, a guide clamping portion is provided on the side of the second volute, and the guide clamping portion includes a guide clamping surface, the guide clamping surface is a plane with an inclined notch, and one end of the guide clamping surface is connected to the side of the second volute, and the inclined notch is suitable for accommodating the guide portion.

[0017] In some optional embodiments, the first locking portion is provided with a first fastening hole, the second locking portion is provided with a second fastening hole, and the first fastening hole is connected to the second fastening hole by a fastener.

[0018] In some optional embodiments, the first opening cooperates with the second opening to form an inner cavity and an air outlet of the volute, the inner cavity is provided with a driving mechanism, the driving mechanism includes fan blades and a motor, and the air outlet is located at the end of the spiral line of the volute in the expansion direction.

[0019] In some optional embodiments, the ventilation device further includes a bottom frame, which is arranged at an end of the second volute away from the first volute or at an end of the first volute away from the second volute, and the bottom frame is connected to the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the ventilation device of an embodiment of the utility model;

[0021] Figure 2 This is a schematic structural diagram of a first volute in an embodiment of the utility model;

[0022] Figure 3 This is a schematic structural diagram of the second volute and the bottom frame of an embodiment of the utility model;

[0023] Figure 4 It is a front view of the first volute of the embodiment of the utility model;

[0024] Figure 5 It is a front view of the second volute of the embodiment of the utility model;

[0025] Figure 6 for Figure 4 A partial enlarged schematic diagram of the first sealing part at A in the middle;

[0026] Figure 7 for Figure 5 A partial enlarged schematic diagram of the second sealing portion at B in the middle;

[0027] Figure 8 It is a schematic diagram of assembling the first sealing portion and the guiding engaging portion of an embodiment of the utility model.

[0028] [Reference Signs]

[0029] The first volute 1, the first sealing portion 11, the first sealing edge 111, the first sealing inner wall surface 1111, the first sealing outer wall surface 1112, the first connecting surface 112, the second connecting surface 113, the guide portion 114, the guide inner wall 1141, the guide outer wall 1142, the guide surface 1143, the first locking portion 12, the first fastening hole 121, and the first opening 13;

[0030] The second volute 2, the second sealing portion 21, the second sealing edge 211, the second sealing inner wall surface 2111, the second sealing outer wall surface 2112, the first receiving surface 212, the second receiving surface 213, the second locking portion 22, the second fastening hole 221, the fastening column 222, the connecting rib 223, the supporting rib 224, the second opening 23, the guide clamping portion 24, and the guide clamping surface 241;

[0031] Driving mechanism 3, bottom frame 4, joint 5, upper joint 51, lower joint 52, shutter 6. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Combine the following Figures 1 to 8 The ventilation device of the utility model is specifically described. The utility model describes the ventilation device in a normal installation direction.

[0036] Figure 1 This is a schematic diagram of the structure of the ventilation device of an embodiment of the utility model; Figure 2 This is a schematic structural diagram of a first volute in an embodiment of the utility model; Figure 3 It is a structural schematic diagram of the second volute and the bottom frame of an embodiment of the utility model.

[0037] like Figures 1 to 3As shown, the ventilation device includes a volute, and the volute includes a first volute 1 and a second volute 2 that are arranged opposite to each other, the bottom surface of the first volute 1 is configured with a first opening 13, and the top surface of the second volute 2 is configured with a second opening 23 that matches the first opening 13; the first volute 1 includes a first sealing portion 11 and a first locking portion 12, the first sealing portion 11 is arranged around the first opening 13, and the first locking portion 12 is arranged outside the first volute 1 and close to the first opening 13; the second volute 2 includes a second sealing portion 21 and a second locking portion 22, the second sealing portion 21 is arranged around the second opening 23, and the second locking portion 22 is arranged outside the second volute 2 and close to the second opening 23; when the first volute 1 and the second volute 2 are assembled, one of the first sealing portion 11 and the second sealing portion 21 is covered on the outside of the other, and the first sealing portion 11 and the second sealing portion 21 are fitted together; the first locking portion 12 and the second locking portion 22 are used to lock the first volute 1 and the second volute 2 in an assembled state.

[0038] Specifically, the volute includes two shells assembled with each other, the assembly direction of the two shells is defined as the vertical direction, and the two shells assembled with the volute with the horizontal direction as the dividing line are defined as the first volute 1 and the second volute 2 respectively. Figure 1 As shown in FIG. 1 , the housing located at the upper side in the vertical direction is the first volute 1 , and the housing located at the lower side is the second volute 2 .

[0039] The first volute 1 includes a top surface, a side surface and a bottom surface. The top surface of the first volute 1 is a plane expanded by a spiral line, the side surface is a curved surface extending in a vertical direction of the top surface and surrounding the edge of the top surface, the bottom surface is consistent with the top surface, and a first opening 13 is formed.

[0040] The second volute 2 includes a top surface, a side surface and a bottom surface. The top surface of the second volute 2 is provided with a second opening 23 that matches the first opening 13, that is, the first opening 13 and the second opening 23 are both expanded in a spiral line. The side shape of the second volute 2 is consistent with the side shape of the first volute 1, the bottom surface of the second volute 2 is in contact with the bottom frame 4, and the bottom surface of the second volute 2 is provided with an air inlet.

[0041] The bottom frame 4 is a hollow square body, located below the second volute 2, and the bottom of the bottom frame 4 extends a flange edge in all directions to be connected and fixed with the panel. The second volute 2 and the bottom frame 4 can be connected by a disassembly structure, or integrally formed by injection molding. In this embodiment, the second volute 2 and the bottom frame 4 are integrally formed. It is understandable that the bottom frame 4 can also be arranged above the first volute 1, and the bottom frame 4 and the first volute 1 are connected by a disassembly structure, or integrally formed by injection molding.

[0042] The first opening 13 cooperates with the second opening 23 to form an inner cavity and an air outlet of the volute, wherein the inner cavity is provided with a driving mechanism 3, and the driving mechanism 3 includes a fan blade and a motor. The air outlet is located at the end of the spiral line of the volute in the direction of expansion.

[0043] The top surface of the first volute 1 is formed with a convex portion, which is in the shape of a truncated cone with a larger bottom area than the top area. The convex portion is arranged at a position offset from the center of the top surface toward the tongue portion to adapt to the installation height of the motor. The outer wall surface of the first volute 1 is provided with reinforcing ribs, which are in the shape of extending from the inclined surface of the convex portion along the top surface of the first volute 1 to the side surface of the first volute 1 to the first sealing portion 11, and are in the shape of expanding along the spiral line arranged on the top surface of the first volute 1.

[0044] The end of the volute is provided with a joint 5, which is a cylindrical body, and the longitudinal section of the joint 5 is elliptical. A rotatable shutter 6 is installed inside the joint 5. In this embodiment, the joint 5 is divided into an upper joint 51 and a lower joint 52 with the horizontal direction as the dividing line. From the longitudinal section direction, the upper joint 5 is in the shape of a semicircular arc. At the end of the spiral expansion direction, the upper joint 51 is connected to the top surface and the side of the first volute 1 or is integrally formed by injection molding. From the longitudinal section direction, the lower joint 52 is in the shape of a semicircular arc. At the end of the spiral expansion direction, the lower joint 52 is connected to the bottom surface and the side of the second volute 2 or is integrally formed by injection molding. One of the upper joint 51 and the lower joint 52 is provided with a groove, and the other is provided with a protrusion. For example, the upper joint 51 is provided with a groove, and the lower joint 52 is provided with a protrusion. When the first opening 13 cooperates with the second opening 23, the groove and the protrusion also cooperate with each other to connect the upper joint 51 with the lower joint 52. In other optional embodiments, the connector 5 may be directly formed as a separate component and connected to the air outlet of the volute via a disassembly structure.

[0045] A first sealing portion 11 is formed on the side of the first volute 1 near one end of the second volute 2. The first sealing portion 11 is arranged around the first opening 13, that is, the first sealing portion 11 extends along the circumferential direction of the side of the first volute 1. A second sealing portion 21 is formed on the side of the second volute 2 near one end of the first volute 1. The second sealing portion 21 is arranged around the second opening 23, that is, the second sealing portion 21 extends along the circumferential direction of the side of the second volute 2. The transverse cross-section of the first sealing portion 11 is different from the transverse cross-section of the second sealing portion 21, for example, the transverse cross-section of the first sealing portion 11 is larger than the transverse cross-section of the second sealing portion 21, and after the first volute 1 and the second volute 2 are assembled, the first sealing portion 11 is covered on the outside of the second sealing portion 21. Or the transverse cross-section of the first sealing portion 11 is smaller than the transverse cross-section of the second sealing portion 21, and after the first volute 1 and the second volute 2 are assembled, the second sealing portion 21 is covered on the outside of the first sealing portion 11. For the convenience of description, the following description is taken as an example that the first sealing portion 11 is covered on the outside of the second sealing portion 21.

[0046] The first volute 1 has a first locking portion 12 convexly formed on the side surface, and the second volute 2 has a second locking portion 22 convexly formed on the side surface, and the first locking portion 12 and the second locking portion 22 correspond to each other. The first locking portion 12 may be a positioning column, and the second locking portion 22 is provided with a positioning hole, and the positioning column is inserted into the positioning hole to lock the first volute 1 and the second volute 2 in an assembled state. Alternatively, the first locking portion 12 is provided with a first fastening hole 121, and the second locking portion 22 is provided with a second fastening hole 221, and the first fastening hole 121 and the second fastening hole 221 correspond to each other, and both are threaded holes, and a fastener is screwed into the first fastening hole 121 and the second fastening hole 221 to achieve a fixed connection between the first volute 1 and the second volute 2, and the fastener may be a screw. The outer wall surface of the first volute 1 is provided with a protruding rib, and the protruding rib extends from the side surface of the first volute 1 to the first locking portion 12.

[0047] After the first volute 1 and the second volute 2 are assembled, the first locking portion 12 and the second locking portion 22 lock the first volute 1 and the second volute 2 in an assembled state to prevent the first volute 1 and the second volute 2 from moving during use. After the first volute 1 and the second volute 2 are assembled, the first sealing portion 11 is covered on the outside of the second sealing portion 21, and the first sealing portion 11 and the second sealing portion 21 are fitted together, and a surface contact is formed between the first sealing portion 11 and the second sealing portion 21. During the operation of the ventilation device, due to the surface contact formed between the first sealing portion 11 and the second sealing portion 21, the airflow is not easy to flow out from the position where the first volute 1 and the second volute 2 are connected, which effectively ensures the sealing of the ventilation device. In addition, no additional sealing parts are added, and the assembly process is convenient.

[0048] In this embodiment, after the first volute 1 and the second volute 2 are assembled, the first volute 1 and the second volute 2 are locked in an assembled state by the first locking portion 12 and the second locking portion 22, and the first sealing portion 11 and the second sealing portion 21 are fitted together, and surface contact is formed between the first sealing portion 11 and the second sealing portion 21, which effectively prevents the airflow inside the volute from flowing out, thereby ensuring the sealing of the ventilation device.

[0049] Figure 4 It is a front view of the first volute of the embodiment of the utility model; Figure 5 It is a front view of the second volute of the embodiment of the utility model; Figure 6 It is a partial schematic diagram of the first sealing part of an embodiment of the utility model; Figure 7 It is a partial schematic diagram of the second sealing portion of an embodiment of the utility model.

[0050] In the embodiments of the present disclosure, Figures 4 to 7As shown, the first sealing portion 11 includes a first sealing edge 111, which is an inclined edge extending from the side of the first volute 1 toward the outside of the first volute 1, and includes a first sealing inner wall surface 1111 and a first sealing outer wall surface 1112 relative to each other; the second sealing portion 21 includes a second sealing edge 211, which is an inclined edge extending from the side of the second volute 2 toward the inside of the second volute 2, and includes a second sealing inner wall surface 2111 and a second sealing outer wall surface 2112 relative to each other.

[0051] Specifically, the first sealing portion 11 is arranged around the first opening 13, and the first sealing portion 11 includes a first sealing edge 111, which is an inclined edge extending from the side of the first volute 1 toward the outside of the first volute 1, and the inclination angle of the first sealing edge 111 relative to the side is not specifically limited. The first sealing edge 111 includes a first sealing inner wall surface 1111 and a first sealing outer wall surface 1112 opposite to each other, the first sealing inner wall surface 1111 is a surface facing the inside of the first volute 1, and the first sealing outer wall surface 1112 is a surface facing the outside of the first volute 1.

[0052] The second sealing portion 21 is arranged around the second opening 23, and the second sealing portion 21 includes a second sealing edge 211, which is an inclined peripheral edge extending from the side of the second volute 2 toward the inside of the second volute 2. The second sealing edge 211 includes a second sealing inner wall surface 2111 and a second sealing outer wall surface 2112 opposite to each other, the second sealing inner wall surface 2111 is a surface facing the inside of the second volute 2, and the second sealing outer wall surface 2112 is a surface facing the outside of the second volute 2. It can be understood that the inclination angle of the second sealing outer wall surface 2112 is consistent with the inclination angle of the first sealing inner wall surface 1111, which is conducive to the second sealing outer wall surface 2112 and the first sealing inner wall surface 1111 to fit tightly.

[0053] The first volute 1 and the second volute 2 are in an assembled state, the first sealing portion 11 is wrapped around the outside of the second sealing portion 21, and the first sealing inner wall surface 1111 is opposite to the second sealing outer wall surface 2112. The first sealing edge 111 and the second sealing edge 211 both form a certain angle with the horizontal direction, and the first sealing edge 111 has a tendency to move toward the second sealing edge 211 under the action of gravity, thereby making the first sealing inner wall surface 1111 and the second sealing outer wall surface 2112 fit more closely, which is conducive to improving the sealing performance of the volute.

[0054] In this embodiment, the inclined first sealing edge 111 and the inclined second sealing edge 211 enable the first volute 1 and the second volute 2 to be in an assembled state, and the first sealing inner wall surface 1111 and the second sealing outer wall surface 2112 fit more closely, which is beneficial to further improve the sealing performance of the volute.

[0055] In the embodiments of the present disclosure, Figure 6 and Figure 7 As shown, the first sealing portion 11 also includes a connecting surface, which is located at the end of the first sealing inner wall surface 1111, and the connecting surface is perpendicular to the assembly direction of the first volute 1 and the second volute 2; the second sealing portion 21 also includes a receiving surface, which is located at the end of the second sealing outer wall surface 2112, and the receiving surface is in contact with the connecting surface.

[0056] Specifically, the assembly direction of the first volute 1 and the second volute 2 is defined to be consistent with the vertical direction, and a connection surface is formed by extending the end of the first sealed inner wall surface 1111 in the horizontal direction. The first sealed inner wall surface 1111 has a top end and a bottom end, and a first connection surface 112 is formed by extending the top end of the first sealed inner wall surface 1111 in the horizontal direction toward the inside of the first volute 1, and a second connection surface 113 is formed by extending the bottom end of the first sealed inner wall surface 1111 in the horizontal direction toward the outside of the first volute 1.

[0057] A receiving surface is formed by extending horizontally from the end of the second sealing outer wall surface 2112, and the second sealing outer wall surface 2112 has a top end and a bottom end. A first receiving surface 212 is formed by extending horizontally from the top end of the second sealing outer wall surface 2112 toward the interior of the second volute 2, and a second receiving surface 213 is formed by extending horizontally from the bottom end of the second sealing outer wall surface 2112 toward the exterior of the second volute 2.

[0058] It is understandable that the end of the first sealing inner wall surface 1111 may be formed with a first connecting surface 112, or with a second connecting surface 113, or with both the first connecting surface 112 and the second connecting surface 113. The end of the second sealing outer wall surface 2112 may be formed with a first receiving surface 212, or with a second receiving surface 213, or with both the first receiving surface 212 and the second receiving surface 213.

[0059] The top end of the first sealed inner wall surface 1111 is formed with a first connecting surface 112, and the bottom end of the first sealed inner wall surface 1111 is formed with a second connecting surface 113. The first connecting surface 112, the first sealed inner wall surface 1111, and the second connecting surface 113 form a stepped bending structure. The top end of the second sealed outer wall surface 2112 is formed with a first receiving surface 212, and the bottom end of the second sealed outer wall surface 2112 is formed with a second receiving surface 213. The first receiving surface 212, the second sealed outer wall surface 2112, and the second receiving surface 213 form a stepped bending structure, and the second receiving surface 213 and the side surface of the second volute 2 also form a bending structure.

[0060] After the first volute 1 and the second volute 2 are assembled, the first sealing inner wall surface 1111 and the second sealing outer wall surface 2112 are closely fitted, the first connecting surface 112 overlaps the first receiving surface 212, and the first connecting surface 112 and the first receiving surface 212 are closely fitted, the second connecting surface 113 overlaps the second receiving surface 213, and the second connecting surface 113 and the second receiving surface 213 are closely fitted. A plurality of closely fitting areas with a bending structure are formed between the first sealing portion 11 and the second sealing portion 21, which effectively prevents airflow from flowing out, and is conducive to further improving the sealing performance of the volute.

[0061] In the embodiments of the present disclosure, Figure 4 and Figure 6 As shown, the first sealing portion 11 further includes a guide portion 114 , which is a curved edge extending from the first sealing edge 111 in a vertical direction, and the vertical direction is the same as the assembly direction of the first volute 1 and the second volute 2 .

[0062] Specifically, the guide portion 114 is a curved edge extending in a vertical direction from one end of the first sealing edge 111 away from the side of the first volute 1. It can be understood that the cross section of the guide portion 114 is larger than the cross section of the second volute 2. During the assembly of the first volute 1 and the second volute 2, the guide portion 114 is used to guide the first volute 1 to move toward the second volute 2 along the assembly direction, which is conducive to the quick assembly of the first volute 1 and the second volute 2.

[0063] In the embodiments of the present disclosure, Figure 6 As shown, the guide portion 114 includes a guide inner wall 1141 , which is a surface facing the interior of the first volute 1 and fits against the side surface of the second volute 2 , forming a bent structure with the connecting surface at the bottom of the first sealing inner wall surface 1111 .

[0064] Specifically, the guide portion 114 has a suitable thickness, and includes a relative guide inner wall 1141 and a guide outer wall 1142, wherein the guide inner wall 1141 is a side facing the inside of the first volute 1, and the guide outer wall 1142 is a side facing the outside of the first volute 1. The guide inner wall 1141 and the guide outer wall 1142 are vertical curved surfaces, and the guide inner wall 1141 forms a bent structure with the second connecting surface 113 at the bottom end of the first sealing edge 111. After the first volute 1 and the second volute 2 are assembled, the guide inner wall 1141 fits the side of the second volute 2, which is conducive to further improving the sealing performance of the volute.

[0065] Furthermore, a guide surface 1143 is formed at one end of the inner side of the guide portion 114 away from the second connecting surface 113, and the inclination angle of the guide surface 1143 is consistent with the inclination angle of the first sealing inner wall surface 1111. To ensure the sealing performance, the gap between the guide inner wall 1141 and the side surface of the second volute 2 is small, and the guide surface 1143 facilitates the smooth movement of the guide inner wall 1141 relative to the side surface of the second volute 2 in the vertical direction during the movement of the first volute 1 toward the second volute 2.

[0066] In the embodiments of the present disclosure, Figure 3 and Figure 8 As shown, a guide clamping portion 24 is provided on the side of the second volute 2, and the guide clamping portion 24 includes a guide clamping surface 241, which is a plane with an inclined notch, and one end of the guide clamping surface 241 is connected to the side of the second volute 2, and the inclined notch is suitable for accommodating the guide portion 114.

[0067] Specifically, the guide engaging portion 24 is an irregular shape extending vertically upward from the bottom frame 4, the top of the guide engaging portion 24 is higher than the top surface of the second volute 2, a plurality of guide engaging portions 24 are arranged at intervals along the circumferential direction of the side surface of the second volute 2, and the guide engaging portion 24 is arranged close to the second locking portion 22, and the number of the guide engaging portions 24 is not specifically limited. The guide engaging portion 24 includes a guide engaging surface 241, which is a plane with an inclined notch, and one end of the guide engaging surface 241 is connected to the side surface of the second volute 2. The inclined notch can accommodate the guide portion 114 of the first volute 1, and there is a gap between the guide outer wall 1142.

[0068] The inclined edge is conducive to guiding the guide portion 114 to enter the inclined notch in the vertical direction. The guide engaging portion 24 cooperates with the guide portion 114, effectively preventing the first volute 1 from moving in the horizontal direction during the vertical movement, which is conducive to the smooth cooperation between the first sealing portion 11 and the second sealing portion 21. In addition, multiple guide engaging portions 24 are arranged at intervals on the side of the second volute 2, which is conducive to enhancing the strength of the side of the second volute 2 and effectively preventing the second volute 2 from deformation.

[0069] In the embodiments of the present disclosure, Figure 2 and Figure 3 As shown, the first locking portion 12 is provided with a first fastening hole 121 , and the second locking portion 22 is provided with a second fastening hole 221 . The first fastening hole 121 is connected to the second fastening hole 221 by a fastener.

[0070] Specifically, the first locking portion 12 is arranged outside the first volute 1 and close to the first opening 13, and extends from the guide portion 114 to the outside of the first volute 1 in the horizontal direction to form the first locking portion 12, and the number thereof is set according to actual needs. In this embodiment, four first locking portions 12 are arranged, and the four first locking portions 12 are respectively defined as the first upper locking portion, the second upper locking portion, the third upper locking portion and the fourth upper locking portion, and are arranged at a certain distance. The first upper locking portion is located at the tongue position, and the second upper locking portion is located in the opposite side direction of the tongue, that is, the first upper locking portion and the second upper locking portion are located in the left and right sides of the air outlet. The third upper locking portion and the fourth upper locking portion are located away from the air outlet. The first upper locking portion is irregular in shape, and the second upper locking portion, the third upper locking portion and the fourth upper locking portion are triangular in shape with rounded apex angles, and the apex angles are facing the outside of the first volute 1. The first upper locking portion, the second upper locking portion, the third upper locking portion and the fourth upper locking portion are all provided with a first fastening hole 121 .

[0071] The second locking portion 22 is arranged outside the second volute 2 and close to the second opening 23. The position of the second locking portion 22 corresponds to the first locking portion 12 one by one, and the number of the second locking portions 22 is also consistent with the number of the first locking portions 12. In this embodiment, four second locking portions 22 are arranged, and the four second locking portions 22 are respectively defined as the first lower locking portion, the second lower locking portion, the third lower locking portion, and the fourth lower locking portion. The first lower locking portion is located at the tongue position, and the second lower locking portion is located on the opposite side of the tongue, that is, the first lower locking portion and the second lower locking portion are located on the left and right sides of the air outlet, and the third lower locking portion and the fourth lower locking portion are located away from the air outlet. The first lower locking portion includes a connecting rib 223 and a fastening column 222, and the second lower locking portion, the third lower locking portion, and the fourth lower locking portion all include a connecting rib 223, a fastening column 222, and a supporting rib 224. The connecting rib 223 is a plate-like body extending vertically upward from the bottom frame 4, and one end of the plate-like body is connected to the side of the second volute 2, and the other end is connected to the fastening column 222. The fastening column 222 is a cylindrical body with a through-core structure extending vertically upward from the bottom frame 4, and its through-core structure is the second fastening hole 221. The supporting rib 224 is an irregular trapezoidal plate-like body extending vertically upward from the bottom frame 4, and its long side is connected to the fastening column 222, and the connecting rib 223 and the supporting rib 224 are located in the same vertical plane. The first fastening hole 121 and the second fastening hole 221 are connected and fixed by a fastener. In this embodiment, the fastener is a screw, and the first fastening hole 121 and the second fastening hole 221 are both threaded holes. The screw passes through the first fastening hole 121 and is screwed into the second fastening hole 221 to lock the first volute 1 and the second volute 2.

[0072] The assembly process of the volute is described in detail below.

[0073] During the process of assembling the first volute 1 and the second volute 2, firstly, the first opening 13 of the first volute 1 is aligned with the second opening 23 of the second volute 2. Since the top of the guide engaging portion 24 is higher than the top surface of the second volute 2, when the first volute 1 moves in the vertical direction, the guide portion 114 will first pass through or contact the top of the guide engaging portion 24. When the guide portion 114 contacts the guide engaging portion 24, since the guide engaging surface 241 has an inclined notch, the inclined edge can guide the guide portion 114 into the inclined notch, thereby preventing the first volute 1 from moving in the horizontal direction, which is beneficial to the smooth cooperation of the first sealing portion 11 and the second sealing portion 21. Multiple guide engaging portions 24 are arranged at intervals on the side of the second volute 2, which is beneficial to enhancing the strength of the side of the second volute 2 and effectively avoiding the problem that the second volute 2 is difficult to assemble due to deformation of the first volute 1 and the second volute 2.

[0074] Then, the guide surface 1143 will contact the second sealing outer wall surface 2112. Since the guide surface 1143 and the second sealing outer wall surface 2112 have the same inclination angle, it is beneficial for the guide portion 114 to smoothly enter the inclined notch along the second sealing outer wall surface 2112. When the guide portion 114 gradually enters the inclined notch, the guide inner wall 1141 also gradually approaches the side surface of the second volute 2. Since the guide inner wall 1141 and the side surface of the second volute 2 are both vertical curved surfaces, the two can fit tightly, and the guide inner wall 1141 moves downward along the side surface of the second volute 2.

[0075] At the same time, the first sealed inner wall surface 1111 moves through the first receiving surface 212 located at the top of the second sealed outer wall surface 2112, and approaches the second sealed outer wall surface 2112. Since the first sealed inner wall surface 1111 and the second sealed outer wall surface 2112 have the same inclination angle, the two are tightly fitted. When the first sealed inner wall surface 1111 moves close to the second receiving surface 213 at the bottom of the second sealed outer wall surface 2112, it cannot continue to move downward due to the horizontal plane structure of the second receiving surface 213 being blocked. Since the first receiving surface 212, the second sealed outer wall surface 2112 and the second receiving surface 213 form a bending structure, and the receiving surface and the connecting surface are parallel to the horizontal direction, the first sealed inner wall surface 1111 and the second sealed outer wall surface 2112 are tightly fitted, the first receiving surface 212 and the first connecting surface 112 are tightly fitted, and the second receiving surface 213 and the second connecting surface 113 are tightly fitted, and the airflow in the volute is not easy to flow out.

[0076] After the first volute 1 and the second volute 2 are assembled, it can be seen from the longitudinal section that the first sealing portion 11 covers the outer side of the second sealing portion 21. Under the protection of the multi-layer close fitting and bending structure, the airflow is not easy to flow out when the ventilation device is running, which effectively ensures the sealing of the ventilation device.

[0077] In summary, the ventilation device of the present invention has the following effective effects.

[0078] The inclination angles of the first sealed inner wall surface 1111 and the second sealed outer wall surface 2112 of the ventilation device are consistent, so that the first sealed inner wall surface 1111 and the second sealed outer wall surface 2112 can fit tightly, and the guide inner wall 1141 and the side of the second volute 2 are both vertical curved edges, so that the guide inner wall 1141 and the side of the second volute 2 can fit tightly, and the airflow is not easy to flow out, thereby ensuring the sealing of the volute.

[0079] The top and bottom of the second sealed outer wall surface 2112 of the ventilation device are respectively formed with a first receiving surface 212 and a second receiving surface 213, which can prevent the first sealed inner wall surface 1111 from continuing to move along the second sealed outer wall surface 2112, that is, prevent the first volute 1 from continuing to move toward the second volute 2, which helps to fix the relative position of the first volute 1 and the second volute 2. On the other hand, since the first connecting surface 112, the first sealed inner wall surface 1111, the second connecting surface 113 and the guide inner wall 1141 form a bending structure, the first receiving surface 212, the second sealed outer wall surface 2112, the second receiving surface 213 and the side of the second volute 2 form a bending structure. The two bending structures cooperate with each other, so that the area where the first sealing part 11 and the second sealing part 21 are in contact and the area where the guide part 114 and the side of the second volute 2 are in contact form a plurality of stepped tightly fitting areas, which effectively prevents airflow from flowing out and ensures the sealing of the volute.

[0080] The guiding engaging surface 241 of the ventilation device has an inclined notch, and the inclined edge can guide the guide part 114 into the inclined notch to prevent the first volute 1 from moving in the horizontal direction, which is beneficial to the smooth cooperation between the first sealing part 11 and the second sealing part 21, and the guiding engaging part 24 is arranged at intervals on the side of the second volute 2, which is beneficial to enhance the strength of the side of the second volute 2 and effectively avoid the problem of the first volute 1 and the second volute 2 being difficult to assemble due to deformation of the second volute 2.

[0081] 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.

[0082] 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.

[0083] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation device, comprising: A volute, the volute comprising a first volute and a second volute arranged opposite to each other, the bottom surface of the first volute is configured with a first opening, and the top surface of the second volute is configured with a second opening matched with the first opening; It is characterized in that The first volute comprises a first sealing portion and a first locking portion, the first sealing portion is arranged around the first opening, and the first locking portion is arranged outside the first volute and close to the first opening; The second volute comprises a second sealing portion and a second locking portion, the second sealing portion is arranged around the second opening, and the second locking portion is arranged outside the second volute and close to the second opening; When the first volute and the second volute are assembled, one of the first sealing part and the second sealing part is covered on the outside of the other, and the first sealing part and the second sealing part are in contact with each other; the first locking part and the second locking part are used to lock the first volute and the second volute in an assembled state.

2. The ventilation device according to claim 1, characterized in that: The first sealing portion includes a first sealing edge, which is an inclined peripheral edge extending from the side of the first volute toward the outside of the first volute, and includes a first sealing inner wall surface and a first sealing outer wall surface opposite to each other; The second sealing portion includes a second sealing edge, which is an inclined peripheral edge extending from the side of the second volute toward the inside of the second volute, and includes a second sealing inner wall surface and a second sealing outer wall surface opposite to each other.

3. The ventilation device according to claim 2, characterized in that: The first sealing inner wall surface and the second sealing outer wall surface have the same inclination angle, so that the first sealing inner wall surface and the second sealing outer wall surface fit each other.

4. The ventilation device according to claim 2, characterized in that: The first sealing portion further includes a connecting surface, the connecting surface is located at an end of the first sealing inner wall surface, and the connecting surface is perpendicular to an assembly direction of the first volute and the second volute; The second sealing portion further includes a receiving surface, which is located at an end of the second sealing outer wall surface, and the receiving surface is in contact with the connecting surface.

5. The ventilation device according to claim 4, characterized in that: The first sealing portion further includes a guide portion, which is a curved surrounding edge extending from the first sealing edge in a vertical direction, and the vertical direction is the same as an assembly direction of the first volute and the second volute.

6. The ventilation device according to claim 5, characterized in that: The guide portion includes a guide inner wall, which is a surface facing the interior of the first volute and fits the side surface of the second volute to form a bending structure with the connecting surface at the bottom of the first sealing inner wall surface.

7. The ventilation device according to claim 5, characterized in that: The guide portion further includes a guide surface, which is a surface facing the interior of the first volute, and an inclination angle of the guide surface is consistent with an inclination angle of the first sealing inner wall surface.

8. The ventilation device according to claim 5, characterized in that: A guide clamping portion is provided on the side of the second volute, and the guide clamping portion includes a guide clamping surface, which is a plane with an inclined notch, and one end of the guide clamping surface is connected to the side of the second volute, and the inclined notch is suitable for accommodating the guide portion.

9. The ventilation device according to claim 1, characterized in that: The first locking portion is provided with a first fastening hole, the second locking portion is provided with a second fastening hole, and the first fastening hole and the second fastening hole are connected by a fastener.

10. The ventilation device according to any one of claims 1 to 9, characterized in that: The first opening cooperates with the second opening to form an inner cavity and an air outlet of the volute. The inner cavity is provided with a driving mechanism, and the driving mechanism includes fan blades and a motor. The air outlet is located at the end of the spiral line of the volute in the expansion direction.

11. The ventilation device according to any one of claims 1 to 9, characterized in that: The ventilation device further comprises a bottom frame, which is arranged at one end of the second volute away from the first volute or at one end of the first volute away from the second volute, and the bottom frame is connected to the panel.

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