Volute structure and duct type air conditioner

Abstract

The embodiment of the utility model provides a volute structure and a duct type air conditioner, and the volute structure comprises a first volute provided with an air outlet, a fixed cross beam and a plurality of first clamping parts; the fixed cross beam is arranged around the air outlet and is used for being fixedly connected with a volute mounting piece; the second volute is provided with an elastic abutting part and a plurality of second clamping parts; the multiple first clamping parts and the multiple second clamping parts are correspondingly clamped, so that the first volute and the second volute are connected to define a volute air duct; the elastic abutting part elastically abuts against the fixed cross beam so as to eliminate an assembling gap between the first volute and the second volute.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a volute structure and a ducted air conditioner. BACKGROUND

[0002] In the related art, part of the volute structure is assembled by upper and lower volute clamping, and then is installed on the volute mounting member such as a volute fixing plate. In the running process, the upper and lower volutes are prone to misalignment and knocking, which produces a large amount of abnormal noise and causes a large amount of noise disturbance to the user. CONTENT OF THE UTILITY MODEL

[0003] The volute structure and the ducted air conditioner provided by the embodiments of the present application can eliminate the misalignment and knocking between the first volute and the second volute, thereby eliminating the abnormal noise generated thereby and improving the user's experience of quiet use.

[0004] In one aspect, the present application provides a volute structure, comprising: a first volute, provided with an air outlet, a fixed crossbeam and a plurality of first clamping portions; the fixed crossbeam is arranged around the air outlet and is used for fixed connection with a volute mounting member; a second volute, provided with an elastic abutting portion and a plurality of second clamping portions; a plurality of the first clamping portions and a plurality of the second clamping portions are correspondingly clamped, so that the first volute and the second volute are connected to form a volute air duct; and the elastic abutting portion elastically abuts on the fixed crossbeam, so as to eliminate the assembly gap between the first volute and the second volute.

[0005] In some embodiments, a limiting stop rib is arranged on the first volute, and the limiting stop rib abuts against the second volute in a direction from the elastic abutting portion to the fixed crossbeam.

[0006] In some embodiments, a first air duct cavity and a first stop bar are arranged on the first volute, a first opening portion is formed on at least one end of the first air duct cavity in an axial direction of the volute air duct, the first stop bar extends in a circumferential direction of the first opening portion, and the limiting stop rib extends outward from an edge of the first stop bar close to the fixed crossbeam; a second air duct cavity and a second stop bar are arranged on the second volute, a second opening portion is formed on at least one end of the second air duct cavity in an axial direction of the volute air duct, the second stop bar extends in a circumferential direction of the second opening portion; when the first volute and the second volute are connected, the first air duct cavity and the second air duct cavity are connected to form the volute air duct, the first stop bar and the second stop bar are connected to form an end stop ring, and the limiting stop rib abuts against the second stop bar in a direction from the elastic abutting portion to the fixed crossbeam.

[0007] In some embodiments, the first baffle strip is provided with a first through slot, the second baffle strip is provided with a second through slot, the first through slot and the second through slot are connected to form an annular slot, and the annular slot is arranged towards the inside of the volute air duct.

[0008] In some embodiments, the second volute includes a second volute body, a curved plate and an abutting plate connected in sequence, the second volute body and the first volute are connected to enclose the volute air duct, the curved plate is formed on a side edge of the second volute body along the radial direction of the volute air duct, the abutting plate is arranged in relative spacing with the second volute body, and the elastic abutting portion is formed on the abutting plate.

[0009] In some embodiments, the second volute includes an end connecting plate connecting the second volute body, the curved plate and the abutting plate respectively, and the second clamping portion is arranged on the end connecting plate.

[0010] In some embodiments, the second volute includes a reinforcing rib connecting the second volute body, the curved plate and the abutting plate respectively.

[0011] In some embodiments, the first volute is provided with a first air duct cavity, the second volute is provided with a second air duct cavity, the first air duct cavity and the second air duct cavity are connected to form the volute air duct, and the extension direction of the first air duct cavity is perpendicular to or inclined to the opening direction of the air outlet.

[0012] In some embodiments, the first volute is respectively provided with the first clamping portion on opposite ends along the axial direction of the volute air duct, the second volute is respectively provided with the second clamping portion on opposite ends along the axial direction of the volute air duct, and the first clamping portion and the second clamping portion are correspondingly clamped.

[0013] In some embodiments, the first volute is respectively provided with the first clamping portion on opposite sides along the radial direction of the volute air duct, the second volute is respectively provided with the second clamping portion on opposite sides along the radial direction of the volute air duct, and the first clamping portion and the second clamping portion are correspondingly clamped.

[0014] In another aspect, the embodiments of the present application provide a ducted air conditioner, including a fan, a volute mounting member and the volute structure provided by any one of the above embodiments, the volute mounting member is provided with a through air hole, the fixed cross beam and the volute mounting member are fixedly mounted, the air outlet and the through air hole are correspondingly arranged, the outer peripheral wall of the air outlet passes through the through air hole, and the fan is mounted in the volute air duct.

[0015] The second volute is provided with an elastic abutting part, the elastic abutting part elastically abuts against the fixed cross beam, the first volute and the second volute are pre-tightened to eliminate the assembly gap between the first clamping part and the second clamping part, and further eliminate the assembly gap between the first volute and the second volute. Since the assembly gap between the first volute and the second volute is eliminated, the first volute and the second volute are not prone to dislocation and collision, and further abnormal noise caused by dislocation and collision is eliminated, thereby improving the quiet use experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is an exploded structural view of the volute structure provided by some embodiments of the present application;

[0018] Figure 2 is a sectional view of the volute structure provided by some embodiments of the present application;

[0019] Figure 3 is Figure 2 is an enlarged structural view of M in the volute structure in

[0020] Figure 4 is Figure 2 is an enlarged structural view of N in the volute structure in

[0021] Figure 5 is an exploded structural view of the air pipe machine provided by some embodiments of the present application.

[0022] Main element symbol explanation:

[0023] 1-volute structure, 11-first volute, 111-air outlet, 112-fixed cross beam, 113-first clamping part, 114-limiting stop rib, 115-first air duct cavity, 116-first stop bar, 1161-first through groove, 12-second volute, 121-second volute body, 1211-second air duct cavity, 122-second stop bar, 1221-second through groove, 123-bent plate, 124-abutting plate, 125-elastic abutting part, 126-end connecting plate, 127-stiffening rib, 128-second clamping part, 2-fan, 3-volute mounting piece, 31-air passing hole, 4-motor support, 5-driving motor, 6-transmission shaft. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in the description of the embodiments of the present application in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by any person skilled in the art without creative effort belong to the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0026] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0027] The use of "adapted to" or "configured to" in the present application means open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps. In addition, the use of "based on" means open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or values beyond those stated in practice.

[0028] In the present application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" in the present application is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the present application. In the following description, for the purposes of explanation, numerous details are set forth in order to provide a thorough understanding. It should be apparent to those skilled in the art that the present application can be practiced without the use of these specific details. In other instances, well-known structures and processes are not described in detail in order to avoid obscuring the description of the present application. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0029] As shown in Figures 1 to 4 In one aspect, the embodiment of the present application provides a volute structure 1, which comprises a first volute 11 and a second volute 12, and can eliminate the misalignment and knocking between the first volute 11 and the second volute 12, and between the volute structure 1 and the volute mounting member 3, thereby eliminating the abnormal noise caused thereby and improving the user's quiet use experience.

[0030] The first volute 11 is provided with an air outlet 111, a fixed cross beam 112 and a plurality of first clamping portions 113. The fixed cross beam 112 is formed on the outer peripheral wall of the air outlet 111 and is fixedly connected with the volute mounting member 3 such as a volute fixing plate. The second volute 12 is provided with an elastic abutting portion 125 and a plurality of second clamping portions 128.

[0031] The plurality of first clamping portions 113 and the plurality of second clamping portions 128 are correspondingly clamped to connect and enclose the first volute 11 and the second volute 12 into a volute air duct, so that the first volute 11 and the second volute 12 can be quickly clamped and assembled. One of the first clamping portion 113 and the second clamping portion 128 can be a male clamping portion, and the other can be a female clamping portion. The male clamping portion and the female clamping portion are correspondingly clamped. Here, the volute air duct can be used to install the fan 2.

[0032] The elastic abutting portion 125 elastically abuts on the side surface of the fixed cross beam 112 away from the volute mounting member 3, so as to eliminate the assembly gap between the first volute 11 and the second volute 12 and the assembly gap between the fixed cross beam 112 and the volute mounting member 3. The number of the elastic abutting portion 125 can be determined according to actual needs, which is not limited in the embodiment of the present application. For example, a plurality of elastic abutting portions 125 can be provided on the second volute 12, and the plurality of elastic abutting portions 125 can be sequentially and spacedly arranged along the axial direction of the volute air duct.

[0033] Here, after the plurality of first clamping portions 113 and the plurality of second clamping portions 128 are correspondingly clamped, the elastic abutting portion 125 can elastically abut on the fixed cross beam 112, and pre-tighten the first volute 11 and the second volute 12 to eliminate the assembly gap between the first clamping portion 113 and the second clamping portion 128, and further eliminate the assembly gap between the first volute 11 and the second volute 12. Since the assembly gap between the first volute 11 and the second volute 12 and the assembly gap between the fixed cross beam 112 and the volute mounting member 3 are eliminated, the first volute 11 and the second volute 12 are not prone to misalignment and knocking, and further eliminate the abnormal noise caused by misalignment and knocking, thereby improving the user's quiet use experience.

[0034] In addition, the elastic abutting portion 125 can elastically abut the fixed crossbeam 112 against the volute mounting member 3, so as to eliminate the assembly gap between the fixed crossbeam 112 and the volute mounting member 3. Since the assembly gap between the fixed crossbeam 112 and the volute mounting member 3 is eliminated, the volute structure 1 and the volute mounting member 3 are not likely to be dislocated and collide, and thus the abnormal noise caused by the dislocation and collision is eliminated, so as to improve the quiet use experience of the user.

[0035] In some embodiments, the first volute 11 can be provided with a limiting rib 114, which is arranged in a spaced-apart manner relative to the fixed crossbeam 112. When the plurality of first clamping portions 113 and the plurality of second clamping portions 128 are clamped in correspondence, the limiting rib 114 can abut the second volute 12 in a direction from the elastic abutting portion 125 to the fixed crossbeam 112, so as to elastically abut the elastic abutting portion 125 against a side surface of the fixed crossbeam 112 away from the volute mounting member 3. In this way, the elastic deformation of the elastic abutting portion 125 can be utilized to clamp the region of the second volute 12 provided with the elastic abutting portion 125 between the limiting rib 114 and the fixed crossbeam 112, so as to realize the reliable pre-tightening between the first volute 11 and the second volute 12, thereby eliminating the assembly gap between the first volute 11 and the second volute 12 and realizing a better quiet effect. When the fan 2 vibrates, the limiting rib 114 further abuts the second volute 12 under the action of vibration, so that the elastic abutting portion 125 is further elastically abutted against the fixed crossbeam 112 to form a damping and buffering action between the elastic abutting portion 125 and the fixed crossbeam 112, which can on the one hand avoid the dislocation and collision of the first volute 11 and the second volute 12 under the influence of the vibration of the fan 2, and on the other hand avoid the obvious vibration of the fixed crossbeam 112 under the influence of the vibration of the fan 2, thereby avoiding the abnormal noise caused by the vibration of the fixed crossbeam 112 striking the volute mounting member 3, so as to improve the quiet use experience of the user.

[0036] In some examples, the first volute 11 can be provided with a first air duct cavity 115 and a first blocking strip 116. The first air duct cavity 115 is formed with a first opening portion at at least one end in the axial direction of the volute air duct, and the first blocking strip 116 is formed on the edge of the first opening portion in the circumferential direction of the first opening portion. The limiting rib 114 extends outwardly from the edge of the first blocking strip 116 close to the fixed crossbeam 112 and is arranged in a spaced-apart manner relative to the fixed crossbeam 112.

[0037] Correspondingly, the second volute 12 can be provided with a second air duct cavity 1211 and a second baffle strip 122. The second air duct cavity 1211 is formed with a second opening portion at least at one end along the axial direction of the volute air duct, and the second baffle strip 122 extends along the circumferential direction of the second opening portion and is formed at the edge of the second opening portion. When the first volute 11 and the second volute 12 are connected, the first air duct cavity 115 and the second air duct cavity 1211 are connected to form the volute air duct, the first baffle strip 116 and the second baffle strip 122 are connected to form the end baffle ring, and the limiting baffle rib 114 abuts against the second baffle strip 122 in the direction from the elastic abutment portion 125 to the fixed cross beam 112. In this way, the limiting baffle rib 114 can apply a pre-tightening force to the second baffle strip 122 in the direction from the elastic abutment portion 125 to the fixed cross beam 112, which in turn applies a pre-tightening force to the elastic abutment portion 125, so that the elastic abutment portion 125 elastically abuts against the side surface of the fixed cross beam 112 away from the volute mounting member 3, thereby achieving reliable pre-tightening between the first volute 11 and the second volute 12.

[0038] For example, the first baffle strip 116 can be provided with a first through slot 1161, and the second baffle strip 122 can be provided with a second through slot 1221. When the first baffle strip 116 and the second baffle strip 122 are connected, the first through slot 1161 and the second through slot 1221 are connected to form an annular slot; the annular slot is arranged towards the inside of the volute air duct and can be used to limit and support the end portion of the fan 2.

[0039] The structure of the second volute 12 can be determined according to actual needs, and embodiments of the present application do not limit this. In some embodiments, the second volute 12 can include a second volute body 121, a curved plate 123 and an abutment plate 124 connected in sequence. The second volute body 121 and the first volute 11 are connected to enclose the volute air duct, the curved plate 123 is formed on one side edge of the second volute body 121 along the radial direction of the volute air duct, the abutment plate 124 is arranged opposite to the second volute body 121, and the elastic abutment portion 125 is formed on the abutment plate 124; for example, the curved plate 123 can have a curved shape such as a U-shaped plate or a C-shaped plate, so as to smoothly and elastically connect the second volute body 121 and the abutment plate 124. In this way, after the first clamping portion 113 and the second clamping portion 128 are clamped, the curved plate 123 can elastically displace the abutment plate 124, and in turn cooperate with the elastic deformation of the elastic abutment portion 125 to increase the pre-tightening force between the second volute 12 and the fixed cross beam 112, thereby further increasing the assembly reliability and pre-tightening reliability between the first volute 11 and the second volute 12, and better eliminating the assembly gap between the first volute 11 and the second volute 12 and the assembly gap between the fixed cross beam 112 and the volute mounting member 3, so as to eliminate abnormal noise caused by jolting.

[0040] Exemplarily, the first volute 11 can be provided with the limiting ribs 114 as above, and the limiting ribs 114 and the fixed cross beam 112 can be used to clamp the region provided with the elastic abutting part 125 on the second volute 12 from both sides; thanks to the bending deformation space provided by the bending structure of the bending plate 123, the elastic force of the region provided with the elastic abutting part 125 on the second volute 12 can be further increased, and the assembly reliability and the pre-tightening reliability between the first volute 11 and the second volute 12 can be further increased.

[0041] In some examples, the second volute 12 can include an end connecting plate 126. The end connecting plate 126 connects the second volute body 121, the bending plate 123 and the abutting plate 124 respectively, and the second clamping part 128 is arranged on the end connecting plate 126. By arranging the end connecting plate 126, the connection reliability between the second volute body 121, the bending plate 123 and the abutting plate 124 can be increased; and by arranging the second clamping part 128 on the end connecting plate 126, the second clamping part 128 and the arrangement position of the bending plate 123 / elastic abutting part 125 can be relatively close, the bending deformation of the bending plate 123 can be driven by the clamping force between the first clamping part 113 and the second clamping part 128, and then the elastic abutting part 125 is forced to elastically abut against the fixed cross beam 112, thereby further increasing the assembly reliability and the pre-tightening reliability between the first volute 11 and the second volute 12.

[0042] In some examples, the second volute 12 can include a reinforcing rib 127, and the reinforcing rib 127 connects the second volute body 121, the bending plate 123 and the abutting plate 124 respectively to increase the connection reliability between the second volute body 121, the bending plate 123 and the abutting plate 124. The number of the reinforcing rib 127 can be determined according to actual needs, and the embodiments of the present application are not limited thereto; exemplarily, the second volute 12 can be provided with a plurality of reinforcing ribs 127, and the plurality of reinforcing ribs 127 are sequentially and spacedly arranged along the axial direction of the volute air duct to further increase the connection reliability between the second volute body 121, the bending plate 123 and the abutting plate 124.

[0043] In some embodiments, the first volute 11 can be provided with the first air duct cavity 115 as above, and the second volute 12 can be provided with the second air duct cavity 1211 as above, and the first air duct cavity 115 and the second air duct cavity 1211 are connected to form a volute air duct. Here, the extension direction of the first air duct cavity 115 and the opening direction of the air outlet 111 can be perpendicular or angularly inclined to meet the air direction requirement of the fan 2 with a centrifugal structure.

[0044] In some embodiments, the first volute 11 can be provided with first clamping portions 113 at opposite ends along the axial direction of the volute air duct, and the second volute 12 can be provided with second clamping portions 128 at opposite ends along the axial direction of the volute air duct, and the first clamping portions 113 and the second clamping portions 128 are correspondingly clamped. In this way, the opposite ends of the first volute 11 along the axial direction of the volute air duct and the opposite ends of the second volute 12 along the axial direction of the volute air duct can be clamped and fixed respectively, achieving the purpose of fixing the two ends along the axial direction of the volute air duct.

[0045] In some embodiments, the first volute 11 can be provided with first clamping portions 113 at opposite sides along the radial direction of the volute air duct, and the second volute 12 can be provided with second clamping portions 128 at opposite sides along the radial direction of the volute air duct, and the first clamping portions 113 and the second clamping portions 128 are correspondingly clamped. In this way, the opposite sides of the first volute 11 along the radial direction of the volute air duct and the opposite sides of the second volute 12 along the radial direction of the volute air duct can be clamped and fixed respectively, achieving the purpose of fixing the two sides along the radial direction of the volute air duct.

[0046] As shown in FIG. 1, Figures 1 to 5 As shown in FIG. 1,

[0047] In some embodiments, the ducted air conditioner can be provided with a plurality of volute structures 1, and the plurality of volute structures 1 can be sequentially and spacedly arranged along the axial direction of the volute air duct. In some examples, the ducted air conditioner can be provided with a motor support 4, a driving motor 5, and a transmission shaft 6, the motor support 4 is arranged on the volute mounting member 3, the output end of the driving motor 5 and the transmission shaft 6 are in transmission connection, and the transmission shaft 6 sequentially connects the fans 2 of the plurality of volute structures 1, and the fans 2 of the plurality of volute structures 1 are synchronously driven to rotate by the driving motor 5.

[0048] The volute structure and the ducted fan machine provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above description of the embodiments should not be understood as a limitation on the present application.

Claims

1. A volute structure, characterized by, The utility model relates to a kind of air ducts, including: First volute, is equipped with air outlet, fixed crossbeam and multiple first clamping parts; The fixed crossbeam is arranged around the air outlet, for and volute mounting piece fixed connection; Second volute, is equipped with elastic abutment and multiple second clamping parts;Multiple the first clamping part and multiple the second clamping part correspondingly clamped, to make the first volute and the second volute connection enclose volute air duct;The elastic abutment is elastically abutted on the fixed crossbeam, to eliminate the assembly gap between the first volute and the second volute.

2. The spiral case structure according to claim 1, characterized by The first volute is equipped with limiting baffle rib, and the limiting baffle rib is tightly pressed on the second volute along the direction from the elastic abutment to the fixed crossbeam.

3. The volute structure according to claim 2, characterized by The first volute is equipped with first air duct cavity and first baffle strip, and the first air duct cavity is formed with first opening part along the axial direction of the volute air duct on at least one end, and the first baffle strip extends along the circumferential direction of the first opening part, and the limiting baffle rib extends outward from the edge of the first baffle strip close to the fixed crossbeam; The second volute is equipped with second air duct cavity and second baffle strip, and the second air duct cavity is formed with second opening part along the axial direction of the volute air duct on at least one end, and the second baffle strip extends along the circumferential direction of the second opening part; When the first volute and the second volute are connected, the first air duct cavity and the second air duct cavity are connected to form the volute air duct, the first baffle strip and the second baffle strip are connected to form end baffle ring, and the limiting baffle rib is tightly pressed on the second baffle strip along the direction from the elastic abutment to the fixed crossbeam.

4. The volute structure according to claim 3, characterized by The first baffle strip is equipped with first through slot, and the second baffle strip is equipped with second through slot, and the first through slot and the second through slot are connected to form annular groove, and the annular groove is arranged towards the inside of the volute air duct.

5. The volute structure of claim 1, wherein The second volute includes second volute body, curved plate and abutment plate connected in sequence, the second volute body and the first volute are connected to enclose the volute air duct, the curved plate is formed on the side edge of the second volute body along the radial direction of the volute air duct, the abutment plate and the second volute body are arranged in opposite intervals, and the elastic abutment is formed on the abutment plate.

6. The volute structure according to claim 5, wherein The second volute includes end connecting plate, and the end connecting plate is connected with the second volute body, the curved plate and the abutment plate respectively, and the second clamping part is arranged on the end connecting plate.

7. The volute structure according to claim 5, wherein The second volute includes reinforcing rib, and the reinforcing rib is connected with the second volute body, the curved plate and the abutment plate respectively.

8. The volute structure of claim 1, wherein The first volute is equipped with first air duct cavity, and the second volute is equipped with second air duct cavity, and the first air duct cavity and the second air duct cavity are connected to form the volute air duct, and the extension direction of the first air duct cavity is perpendicular to the opening direction of the air outlet or is inclined at an angle.

9. The volute structure of claim 1, wherein The first volute is provided with the first clamping part on the opposite ends along the axial direction of the volute air duct, and the second volute is provided with the second clamping part on the opposite ends along the axial direction of the volute air duct, and the first clamping part and the second clamping part are correspondingly clamped; and / or the first volute is provided with the first clamping part on the opposite sides along the radial direction of the volute air duct, and the second volute is provided with the second clamping part on the opposite sides along the radial direction of the volute air duct, and the first clamping part and the second clamping part are correspondingly clamped.

10. A ducted fan machine characterised in that, The volute structure comprises a fan, a volute mounting member, and a volute structure according to any one of claims 1-9, the volute mounting member is provided with a wind passing hole, the fixed cross beam and the volute mounting member are fixedly installed, the air outlet and the wind passing hole are correspondingly arranged, the outer peripheral wall of the air outlet passes through the wind passing hole, and the fan is installed in the volute air duct.

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