Air duct assembly and heat pump device

Abstract

The utility model discloses a kind of air duct assembly and heat pump equipment, belong to household appliance technical field, air duct assembly includes air duct shell, fan and support, air duct assembly is constructed air duct using air duct shell, air can be driven by fan by air inlet into air duct, and exhaust by air outlet;Support is connected in the side of air duct shell, air duct assembly can be conveniently installed by support;The mounting portion of support is passed into air duct by mounting port, so that fan can be connected with support by mounting portion, so that fan is stably supported;And air duct shell is made of heat preservation material, play heat insulation effect, reduce the heat transfer of two sides inside and outside air duct, so that air duct shell is not easy to produce condensation, the air duct assembly of embodiment is suitable for heat pump equipment, effectively solve the problem that heat pump equipment appears water leakage due to condensation.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a duct component and a heat pump device. Background Technology

[0002] Currently, heat pump equipment has a duct structure with a fan inside. In related technologies, the duct structure uses a metal shell, and the fan is installed inside the metal shell. The metal shell is connected to the heat pump equipment's casing. However, when heating in low-temperature environments, condensation can easily occur due to the temperature difference between the inside and outside of the duct, making the heat pump equipment prone to dripping problems. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a duct assembly that effectively solves the problem of condensation easily occurring in duct assemblies without affecting the installation structure of the fan.

[0004] This utility model also proposes a heat pump device that includes the above-mentioned air duct components.

[0005] According to a first aspect embodiment of the present invention, a duct assembly includes a duct shell, a fan, and a bracket. The duct shell has a duct, and the duct shell is provided with an air inlet and an air outlet communicating with the duct. The duct shell is made of a heat-insulating material. The fan is disposed inside the duct, and the fan includes a motor and a fan wheel connected to the motor. The bracket is connected to one side of the duct shell. The duct shell is also provided with an installation port communicating with the duct. The bracket is provided with an installation part, which passes through the installation port into the duct shell and is fixedly connected to the motor.

[0006] The air duct assembly according to the embodiments of the present utility model has at least the following beneficial effects:

[0007] The duct assembly uses a duct shell to construct the duct. A fan drives air into the duct through the air inlet and out through the air outlet. A bracket is connected to one side of the duct shell, which facilitates the installation of the duct assembly. The mounting part of the bracket passes through the mounting port into the duct, allowing the fan to be connected to the bracket through the mounting part, thus providing stable support for the fan. Moreover, the duct shell is made of heat-insulating material, which provides heat insulation and reduces heat transfer between the inside and outside of the duct, making the duct shell less prone to condensation. The duct assembly of this embodiment is suitable for heat pump equipment and effectively solves the problem of water leakage caused by condensation in heat pump equipment.

[0008] According to some embodiments of the present invention, the outer peripheral wall of the motor is provided with at least two mounting feet; the bracket includes a metal support plate, the mounting part is a boss formed on the surface of the support plate, the boss is provided with a positioning hole, one end of the motor having a drive shaft is arranged facing the air duct, the other end is inserted into the positioning hole, and the mounting feet are connected to the boss.

[0009] According to some embodiments of the present invention, the positioning hole is formed on the end face of the boss away from the support plate, the end face is provided with at least two fixing members, the at least two fixing members are arranged circumferentially along the positioning hole and connected to the boss, and at least two mounting feet are connected to at least two fixing members in a one-to-one correspondence.

[0010] According to some embodiments of the present invention, the fixing member is an elastic foot pad, the elastic foot pad is fixedly connected to the end face, and the mounting foot is connected to the elastic foot pad; the end face is provided with a positioning structure for positioning the elastic foot pad, and the positioning structure is used to position the elastic foot pad along the circumference of the elastic foot pad.

[0011] According to some embodiments of the present invention, the positioning structure is provided in at least two forms, and each positioning structure includes at least one positioning rib;

[0012] When the positioning structure is configured to have one positioning rib, the positioning rib extends circumferentially along the elastic foot pad and abuts against the outer wall of the elastic foot pad; or, when the positioning structure is configured to have two or more positioning ribs, the two or more positioning ribs are arranged at intervals circumferentially along the elastic foot pad and abut against the outer wall of the elastic foot pad respectively.

[0013] According to some embodiments of the present invention, when the positioning structure is configured to have two or more positioning ribs, the minimum distance between adjacent positioning ribs is less than or equal to the diameter of the elastic foot pad.

[0014] According to some embodiments of this utility model, the elastic foot pad is made of rubber.

[0015] According to some embodiments of the present invention, the boss is a conical platform, the end face is formed on the top surface of the conical platform, the end face is provided with at least two reinforcing ribs, and the at least two reinforcing ribs and at least two fixing members are alternately arranged along the circumference of the end face.

[0016] According to some embodiments of the present invention, the duct shell is a volute made of foam material, the bracket is a metal part, and the duct assembly further includes fasteners made of plastic material. The fasteners are inserted through the bracket and the volute to fix the volute to the bracket.

[0017] A heat pump device according to a second aspect embodiment of the present invention includes a housing and an air duct assembly as described in the first aspect embodiment. The housing is provided with an air inlet and an air outlet. The housing is provided with a cavity communicating with the air inlet and the air outlet. A heat exchanger is provided in the cavity. The air duct assembly is installed in the cavity. The heat exchanger is located between the air inlet and the air outlet. The air outlet is communicating with the air outlet.

[0018] The heat pump device according to the embodiments of this utility model has at least the following beneficial effects:

[0019] The heat pump equipment adopts the air duct assembly of the first aspect embodiment. The mounting part of the bracket is inserted into the air duct through the mounting port, so that the fan can be connected to the bracket through the mounting part, thereby providing stable support for the fan. Moreover, the air duct shell is made of heat insulation material, which plays a role in heat insulation and reduces heat transfer between the inside and outside of the air duct, making it less prone to condensation on the air duct shell, effectively solving the problem of water leakage caused by condensation in the heat pump equipment.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the internal assembly structure of a heat pump device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of an air duct assembly according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the air duct assembly according to an embodiment of the present invention (front view).

[0025] Figure 4 This is a schematic diagram of the air duct assembly according to an embodiment of the present invention (rear view).

[0026] Figure 5 for Figure 1 Enlarged structural diagram at point A;

[0027] Figure 6 This is a schematic diagram of the structure of a bracket according to an embodiment of the present utility model (front view).

[0028] Figure 7 This is a schematic diagram of the structure of a bracket according to an embodiment of the present utility model (rear view).

[0029] Figure 8 This is a schematic diagram of the assembly structure of the bracket and motor according to an embodiment of the present invention;

[0030] Figure 9 for Figure 8 Enlarged structural diagram at point B;

[0031] Figure 10 This is a schematic diagram of the structure of a bracket according to an embodiment of the present utility model (inner view).

[0032] Figure 11 This is an exploded structural diagram of the bracket and volute of an embodiment of the present invention;

[0033] Figure 12 This is a front structural diagram of the bracket and volute according to an embodiment of the present invention;

[0034] Figure 13 for Figure 12 A schematic diagram of the cross-sectional structure along the CC direction;

[0035] Figure 14 for Figure 13 Enlarged structural diagram at point D;

[0036] Figure 15 This is a schematic diagram of the structure of a fastener according to an embodiment of the present invention;

[0037] Figure 16 This is a cross-sectional structural diagram of a fastener according to an embodiment of the present invention.

[0038] Icon labels:

[0039] Duct housing 100; volute housing 101; duct 110; air inlet 120; air outlet 130; mounting port 140; second connecting hole 150;

[0040] Bracket 200; Mounting part 201; Mounting cavity 202; Support plate 210; Mounting surface 211; Corner 2111; Flanged edge 2112; First connecting hole 2113; Reinforcing part 220; First connecting plate 221; Handle part 2211; Second connecting plate 222; Guide part 230; First folded edge 240; First reinforcing rib 241; Step surface 250; Second folded edge 260; Third reinforcing rib 261; Second reinforcing rib 270; Reinforcing groove 280; Boss 290; Mounting hole 291; End face 292; Second through hole 293; Positioning structure 294; Positioning rib 2941; Notch 295; Fourth reinforcing rib 296;

[0041] Fan 300; Motor 310; Mounting foot 311; Support foot 3111; Heat dissipation fin 312; Mounting groove 313; Impeller 320;

[0042] Elastic foot pad 400; First perforation 410;

[0043] Fastener 500; Limiting head 510; Buckle 520; Connecting part 521; Fastening part 522; Inverted buckle 5221; Guide slope 5222;

[0044] Heat pump equipment 1000;

[0045] 2000 for the housing; 2100 for the air inlet; 2200 for the air outlet; 2300 for the chassis; 2400 for the upper guide rail; 2410 for the guide groove; 2500 for the lower guide rail;

[0046] Air duct assembly 3000;

[0047] Waterway components 4000;

[0048] Evaporator 5000. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0050] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, left, right, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0052] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0053] Reference Figure 1 As shown, this utility model proposes a duct assembly 3000, which is applied to a heat pump device 1000. For ease of understanding, the embodiments of the heat pump device 1000 of this utility model are described first.

[0054] The heat pump device 1000 of this utility model embodiment includes a housing 2000, a heat pump component, a water circuit component 4000, and an air duct component 3000. The housing 2000 has a cavity, and the heat pump component, the water circuit component 4000, and the air duct component 3000 are installed in the cavity.

[0055] The heat pump assembly includes a compressor, a first heat exchanger, a second heat exchanger, and a throttling device. The first heat exchanger is located in the middle of the housing 2000 and is arranged vertically along the height of the housing 2000. The first heat exchanger divides the cavity of the housing 2000 into an air inlet cavity and an air outlet cavity. The compressor, the second heat exchanger, the throttling device, and the water circuit assembly 4000 are located in the air inlet cavity, and the air duct assembly 3000 is located in the air outlet cavity.

[0056] In some embodiments, the first heat exchanger is an evaporator 5000, and the second heat exchanger is a plate heat exchanger. The plate heat exchanger includes a refrigerant flow path and a water flow path. The evaporator 5000, the refrigerant flow path of the plate heat exchanger, the throttling component, and the compressor are connected to form a refrigerant circulation loop for refrigerant circulation. The water circuit assembly 4000 includes a water pump, an inlet pipe, an outlet pipe, and a valve body. The inlet pipe and the outlet pipe are respectively connected to the water flow path. The water pump can be installed on either the inlet pipe or the outlet pipe to form a water supply path.

[0057] Reference Figure 1 As shown, the top of the housing 2000 is provided with an air inlet 2100 and an air outlet 2200. The air inlet 2100 is connected to the air inlet cavity, and the air outlet 2200 is connected to the air outlet cavity. The air duct assembly 3000 includes a fan 300. The fan 300 is used to draw outdoor air into the air inlet cavity through the air inlet 2100 and blow it towards the evaporator 5000. After the air exchanges heat with the evaporator 5000, it is discharged through the air outlet 2200.

[0058] During operation, the refrigerant output from the compressor passes through the plate heat exchanger, where it exchanges heat with water via the refrigerant flow path. After throttling, it enters the evaporator 5000, where it exchanges heat with outdoor air before returning to the compressor for the next cycle. A water pump drives chilled water into the water flow path of the plate heat exchanger, allowing the water to exchange heat with the refrigerant. Using the outdoor air as a heat source, heat is extracted through the heat exchange process to produce hot water.

[0059] The heat pump device 1000 of this utility model can provide hot water through the outlet pipe for supplying domestic hot water and heating hot water. Alternatively, the outlet pipe can be connected to a water tank to store the hot water for user use. The inlet of the inlet pipe and the outlet of the outlet pipe are both located on the chassis 2300 of the housing 2000 to avoid affecting the appearance and structure from being located in the visible area on the front or side.

[0060] The heat pump unit 1000 can be installed indoors, specifically in basements, attics, garages, machine rooms, storage rooms, and other similar locations. It offers a wide range of installation options and eliminates the need for outdoor installation, thus avoiding the high costs, long installation times, and high risks associated with outdoor unit installation.

[0061] The above is an example of the heat pump equipment 1000. The following is a specific example illustrating the structure of the air duct assembly 3000 in the heat pump equipment 1000.

[0062] Reference Figure 2 As shown, the air duct assembly 3000 includes an air duct housing 100, a fan 300, and a support 200. The air duct housing 100 is specifically a volute 101, which contains an air duct 110. An air inlet 120 is provided on one side of the volute 101 along its axial direction, and an air outlet 130 is provided on the upper side of the volute 101. The air inlet 120 and the air outlet 130 are respectively connected to the air duct 110. The fan 300 is installed in the air duct 110 and connected to the support 200.

[0063] Reference Figure 1 As shown, in this embodiment, the volute 101 is mounted vertically on the bracket 200, i.e., the air outlet 130 faces upwards, and the bracket 200 is connected to the side of the volute 101 facing away from the air inlet 120. When the air duct assembly 3000 is installed in the air outlet cavity, the air inlet 120 faces the evaporator 5000, the evaporator 5000 is located between the air inlet 2100 and the air inlet 120, and the air outlet 130 is connected to the air outlet 2200.

[0064] In this embodiment, the volute 101 is made of polyurethane foam insulation material, which has a low thermal conductivity and can provide insulation. The support 200 is made of metal material, which can be a sheet metal part processed from metal plate, giving the support 200 sufficient strength to stably support the fan 300 and the volute 101. The hardness of the metal material is greater than that of the foam part, so the support 200 protects the volute 101.

[0065] Understandably, when the heat pump equipment 1000 is used in low-temperature environments, the fan 300 will draw cold outdoor air into the air duct 110 during operation. The temperature outside the air duct 110 is close to the indoor ambient temperature. Since the volute 101 plays a role in heat insulation, it can effectively reduce the heat transfer of the air duct 110, making it less likely for condensation to form on the volute 101 and reducing the risk of water leakage in the heat pump equipment 1000.

[0066] Of course, the material of the volute 101 is not limited to foam material. In some embodiments, the volute 101 can also be made of heat-insulating materials such as vacuum insulation panels. In addition, the air duct shell 100 is not limited to the volute 101. The air duct shell 100 can also be an axial flow air duct component or other forms of air duct structure.

[0067] Reference Figure 1 As shown, a guide rail is installed inside the housing 2000. The guide rail is located inside the air outlet cavity and connected to the side plate or chassis 2300. The guide rail is positioned with its opening facing inwards towards the inside of the air outlet cavity. The bracket 200 is provided with a guide part 230, which is a guiding structure that matches the guide rail. Specifically, it can be a guide groove 2410, a guide block, or other structures. The bracket 200 is slidably connected to the guide rail via the guide part 230. After the air duct assembly 3000 is installed, it can be moved into or out of the air outlet cavity along the guide rail from the opening, facilitating maintenance of the fan 300. It should be noted that after the air duct assembly 3000 is moved into the air outlet cavity, the bracket 200 can be fixed to the housing 2000 by screws or snap-fit, achieving the positioning purpose of the air duct assembly 3000.

[0068] When the fan 300 needs to be inspected, after opening the panel of the housing 2000, the screws can be removed to move the air duct assembly 3000 out of the air outlet along the guide rail, so that the air duct assembly 3000 can be quickly inspected and inspected, and the air duct 110 can be cleaned.

[0069] Reference Figure 2 and Figure 3 As shown, in some embodiments, the bracket 200 is further provided with a mounting part 201. The mounting part 201 is located on the side of the bracket 200 facing the volute 101. The mounting part 201 passes through the volute 101 and enters the air duct 110. The fan 300 is connected to the mounting part 201, thus supporting the fan 300. When the bracket 200 moves into or out of the housing 2000 along the guide rail, the fan 300 can move along with the bracket 200, realizing the function of the air duct assembly 3000 being retractable.

[0070] Reference Figure 3 and Figure 4 As shown, the bracket 200 has guide portions 230 at both ends along the first direction and reinforcing portions 220 at both ends along the second direction. The guide portions 230 are used to connect with the guide rails of the housing 2000, and the reinforcing portions 220 are used to strengthen the structure of the bracket 200. The bracket 200 is a metal support plate 210, which can be a sheet metal part stamped from a metal sheet. The support plate 210 is connected to one side of the volute 101 and is arranged along the height direction of the volute 101 so that the support plate 210 can cover the side of the volute 101.

[0071] In this embodiment, the first direction is the height direction of the support plate 210, and the second direction is the width direction of the support plate 210. The first direction and the second direction are perpendicular to each other. Specifically, Figure 2The vertical direction of the volute 101 shown is the first direction, and the front-back direction of the volute 101 is the second direction. The support plate 210 is located on the left side of the volute 101, the air inlet 120 is located on the right side of the volute 101, and the air outlet 130 is located on the upper side of the volute 101. The guide portions 230 at the upper and lower ends extend along the front-back direction of the volute 101, respectively. The housing 2000 is provided with an upper guide rail 2400 and a lower guide rail 2500, which extend along the front-back direction of the housing 2000, respectively. The upper guide portion 230 is slidably connected to the upper guide rail 2400, and the lower guide portion 230 is slidably connected to the lower guide rail 2500, so that the bracket 200 can move into or out of the air outlet cavity along the front-back direction of the housing 2000, resulting in higher stability.

[0072] Reference Figure 3 As shown, in some embodiments, the guide portion 230 is a first folded edge 240 formed by bending the edge of the support plate 210. The support plate 210 is provided with first folded edges 240 at both ends along the height direction of the volute 101. The first folded edges 240 at the upper and lower ends extend along the front and rear directions of the volute 101, that is, the first folded edges 240 are arranged in the horizontal direction, and the two first folded edges 240 are parallel to each other.

[0073] The support plate 210 is a metal plate, and a first folded edge 240 is formed at the edge of the metal plate by a stamping process, that is, the first folded edge 240 is integrally formed with the metal plate. In some embodiments, the first folded edge 240 can extend in a direction away from the volute 101. The guide rail inside the housing 2000 can specifically be a guide groove 2410, the opening of the guide groove 2410 is set facing the support plate 210, and the first folded edge 240 can be inserted into the guide groove 2410 and slide along the guide groove 2410. The bending angle of the first folded edge 240 can be adjusted according to the opening direction of the guide groove 2410 to ensure that the first folded edges 240 at both the upper and lower ends can be inserted into the corresponding guide grooves 2410. In addition, the length of the first folded edge 240 can be set according to the length of the guide rail.

[0074] Considering that the support plate 210 serves as the support structure for the fan 300, and that the support plate 210 is only connected to the housing 2000 via the guide portion 230, the connection strength requirement is high. Therefore, in this embodiment of the invention, the structure of the first folded edge 240 is reinforced. Specifically, referring to... Figure 3 and Figure 4As shown, a stepped surface 250 is formed by stamping the surface of the support plate 210. The stepped surface 250 is provided along the edge of the support plate 210. The surface of the support plate 210 is divided by the stepped surface 250 to form a first surface and a second surface. The surface of the first folded edge 240 is the first surface, and the second surface is located on the side of the stepped surface 250 away from the first surface. That is to say, the curved surface of the support plate 210 at the aforementioned bend is the stepped surface 250. The stepped surface 250 is provided along the extending direction of the first folded edge 240, and the length of the stepped surface 250 is approximately the same as the length of the first folded edge 240. The upper and lower ends of the support plate 210 each have a stepped surface 250.

[0075] The second surface is the mounting surface 211 of the support plate 210. The mounting part 201 is located on the mounting surface 211. The first surface and the second surface are connected by a stepped surface 250. It can be understood that since the support plate 210 is attached to the side of the volute 101, the stepped surface 250 allows the first folded edge 240 to be higher than the mounting surface 211. That is, the first folded edge 240 is parallel to the mounting surface 211 and the two are offset in the thickness direction of the support plate 210. This creates a certain gap between the first folded edge 240 and the volute 101, and the first folded edge 240 can be inserted into the guide groove 2410 along the vertical direction of the volute 101.

[0076] Combination Figure 1 As shown, it can be understood that the opening of the upper guide groove 2410 is set downwards, and the opening of the lower guide groove 2410 is set upwards.

[0077] Reference Figure 5 As shown, the guide groove 2410 on the upper side is used as an example for explanation. The guide groove 2410 is integrally formed from sheet metal. The front end of the guide groove 2410 is provided with an inlet. The opening of the guide groove 2410 is set downward. The first folded edge 240 can be inserted into the guide groove 2410 from the inlet and move along the guide groove 2410. The side wall of the guide groove 2410 near the volute 101 is located in the gap between the first folded edge 240 and the volute 101. In this way, the guide groove 2410 can guide the first folded edge 240 to move, and the structure is stable and reliable.

[0078] Compared to the L-shaped bend, the stepped surface 250 has an additional bend, providing extra lateral support, which allows the load to be distributed more evenly across the various parts, resulting in a more uniform stress distribution, enhanced overall rigidity, and making the first bend 240 less prone to deformation, thereby enhancing the load-bearing capacity and durability of the structure.

[0079] Reference Figure 6 and Figure 7As shown, the support plate 210 is provided with a plurality of first reinforcing ribs 241, which are spaced apart along the length of the step surface 250. Each first reinforcing rib 241 extends from the first surface to the second surface, that is, the extension direction of the first reinforcing rib 241 is perpendicular to the extension direction of the step surface 250. The first reinforcing rib 241 is located on the surfaces of the mounting surface 211, the step surface 250 and the first folded edge 240. The first reinforcing rib 241 can strengthen the structure of the step surface 250 and the first folded edge 240, making the first folded edge 240 stronger and less prone to deformation.

[0080] Specifically, the first reinforcing rib 241 protrudes from the surface of the metal plate and can be integrally formed by stamping. The length of the first reinforcing rib 241 can be set according to the width of the first folded edge 240 and the height of the step surface 250. For example, the greater the width of the first folded edge 240 and the greater the height of the step surface 250, the greater the length of the first reinforcing rib 241.

[0081] It is understandable that when the support plate 210 bears a load, the first folded edges 240 at both ends act as support points, resulting in stress distribution along the length of the step surface 250. Multiple first reinforcing ribs 241 are spaced apart along the length of the step surface 250, reinforcing the support points. Furthermore, since the extension direction of the first reinforcing ribs 241 is perpendicular to the extension direction of the step surface 250, they alter the stress transmission path. Compared to a step surface 250 structure without reinforcing ribs, this embodiment of the invention uses the first reinforcing ribs 241 to distribute stress more evenly along the path of the first reinforcing ribs 241 to the entire first and second surfaces of the support plate 210, reducing excessive local stress and thus improving the step surface 250's resistance to deformation.

[0082] Reference Figure 2 , Figure 3 and Figure 4 As shown, the reinforcing portions 220 at both ends of the bracket 200 are located on the front and rear sides of the volute 101, respectively, and are connected to the volute 101. The front reinforcing portion 220 is a first connecting plate 221, and the rear reinforcing portion 220 is a second connecting plate 222. The first connecting plate 221, the second connecting plate 222, and the support plate 210 are connected to form a U-shaped bracket 200 structure, which encloses an installation cavity 202. The volute 101 is installed in the installation cavity 202, with its air inlet 120 facing away from the support plate 210. The first connecting plate 221 and the second connecting plate 222 improve the connection strength between the bracket 200 and the volute 101, providing better support for the volute 101. The first connecting plate 221 and the second connecting plate 222 are connected to the volute 101 by means of clips 520, screws, etc.

[0083] Reference Figure 6 and Figure 7 As shown, it can be understood that the first connecting plate 221 and the second connecting plate 222 are respectively arranged on both sides of the width direction of the bracket 200, and the two first folded edges 240 are respectively arranged at both ends of the height direction of the bracket 200. The first folded edges 240 extend along the direction from the first connecting plate 221 to the second connecting plate 222. In this way, the guide part 230 and the reinforcing part 220 do not interfere with each other, the structural design is more reasonable, the structural strength is higher, and the bracket 200 can meet the strength requirements of supporting the fan 300 and connecting with the guide rail, and can also realize the pull-out function.

[0084] Reference Figure 3 and Figure 6 As shown, the first connecting plate 221 extends along the height direction of the volute 101 and covers the front side of the volute 101. In some embodiments, the first connecting plate 221 is provided with a handle 2211 to facilitate manual operation of the pull-out air duct assembly 3000. The handle 2211 may be a groove or other structure that facilitates hand gripping on the surface of the first connecting plate 221.

[0085] Reference Figure 6 and Figure 7 As shown, the first connecting plate 221 and the second connecting plate 222 are respectively arranged perpendicular to the support plate 210, and a plurality of second reinforcing ribs 270 are provided at the corner 2111. These second reinforcing ribs 270 are arranged along the extending direction at the corner 2111, extending from the support plate 210 to the connecting plate. In other words, the extending direction of the second reinforcing ribs 270 is perpendicular to the bending direction of the corner 2111. The second reinforcing ribs 270 can strengthen the structure of the corner 2111, increasing the connection strength of the connecting plates and making them less prone to deformation. The number of second reinforcing ribs 270 can be set according to the length of the corner 2111.

[0086] Specifically, the second reinforcing rib 270 is a triangular rib, which can be integrally formed onto the surface of the support plate 210 by a stamping process. The triangular rib can effectively improve the structural strength of the corner 2111, making the corner 2111 less prone to deformation. The length of the second reinforcing rib 270 can be set according to the bending angle, number of bending segments, and length of the corner 2111. For example, the corner 2111 is formed by two consecutively connected bending segments, and each bending segment is provided with a second reinforcing rib 270.

[0087] Understandably, when the support plate 210 forms an angle with the first connecting plate 221 and the second connecting plate 222, the corner 2111 is a high-risk area for stress concentration. When subjected to external forces, such as tension, compression, or torque, the stress at the corner 2111 tends to concentrate at this point of geometric abrupt change. By adding the second reinforcing rib 270, this tendency for stress concentration can be interrupted, dispersing the stress over a larger area and making the stress distribution more uniform, thereby preventing premature cracking or deformation at the corner 2111. The second reinforcing rib 270 enhances the connection strength between the support plate 210 and the connecting plates on both sides, firmly connecting the two components in different directions and improving the overall structure's ability to work together at the corner 2111.

[0088] In some embodiments, a reinforcing groove 280 can be used instead of the second reinforcing rib 270. Specifically, multiple reinforcing grooves 280 are provided at the corners 2111 between the support plate 210 and the first connecting plate 221, and at the corners 2111 between the support plate 210 and the second connecting plate 222. The multiple reinforcing grooves 280 are arranged along the extending direction at the corners 2111, and each reinforcing groove 280 is approximately rectangular. The reinforcing grooves 280 are arranged along the direction from the support plate 210 to the connecting plates on both sides. The reinforcing grooves 280 are recessed structures formed by a stamping process. When the bracket 200 is subjected to external force, the presence of the reinforcing grooves 280 prevents the stress from being excessively concentrated at the corners 2111, but rather disperses it along the groove wall, which is equivalent to forming a structure similar to a reinforcing rib locally. This improves the resistance to deformation and damage at the corners 2111, thereby improving the structural strength at the corners 2111. The number of reinforcing grooves 280 can be set according to the length of the corners 2111.

[0089] It should be noted that, Figure 6 and Figure 7 In the embodiment shown, a second reinforcing rib 270 and a reinforcing groove 280 are respectively provided between the support plate 210 and the connecting plates on both sides. That is, the second reinforcing rib 270 and the reinforcing groove 280 are provided at the corner 2111. At this time, the triangular ribs are distributed in the reinforcing groove 280, so that the strength at the corner 2111 is evenly distributed and the reliability is higher.

[0090] The first reinforcing rib 241, the second reinforcing rib 270, or the reinforcing groove 280 effectively utilize local materials to enhance the strength of the structure without significantly increasing the overall weight of the support plate 210, so that the bracket 200 can better maintain its shape stability when bearing load.

[0091] Reference Figure 4 and Figure 7As shown, the second connecting plate 222 is disposed on the side of the support plate 210 away from the first connecting plate 221. In this embodiment, there are two second connecting plates 222, which are located at both ends of the support plate 210 along the height direction of the volute 101. The two second connecting plates 222 are respectively connected to the side wall of the volute 101.

[0092] In some embodiments, the rear edge of the support plate 210 is bent to form a second folded edge 260, which is located between the two connecting plates and extends along the height direction of the volute 101. Additionally, a positioning structure 294 matching the second folded edge 260 is provided on the inner side of the housing 2000. When the air duct assembly 3000 moves into the housing 2000 along the guide rail and is installed in place, the second folded edge 260 can cooperate with the positioning structure 294 inside the housing 2000 for positioning, making the connection between the bracket 200 and the housing 2000 more stable and preventing the air duct assembly 3000 from shaking. The positioning structure 294 can specifically be a positioning groove or a positioning buckle, etc.

[0093] Reference Figure 6 and Figure 7 As shown, the support plate 210 forms a second folded edge 260 through a stamping process. A stepped surface 250 is formed between the surface of the second folded edge 260 and the mounting surface 211. That is, the stepped surface 250 is arranged along the circumference of the support plate 210, so that the first folded edge 240 and the second folded edge 260 are respectively connected to the mounting surface 211 through the stepped surface 250.

[0094] In addition, in this embodiment, the support plate 210 is also provided with a plurality of third reinforcing ribs 261. The plurality of third reinforcing ribs 261 are spaced apart along the length direction of the step surface 250. Each third reinforcing rib 261 extends from the second folded edge 260 to the mounting surface 211. The third reinforcing ribs 261 can improve the strength of the second folded edge 260 and make it less prone to deformation. For the specific structural principle, please refer to the function of the first reinforcing rib 241 described above.

[0095] Reference Figure 6 and Figure 7As shown, the edge of the bracket 200 is provided with a flange 2112, which overlaps with the plate body of the bracket 200 to form a thickened edge structure, thereby improving the strength of the edge and further enhancing the overall strength of the bracket 200, making the overall structure of the bracket 200 less prone to deformation. Specifically, the edges of the support plate 210, the first folded edge 240, the second folded edge 260, the first connecting plate 221, and the second connecting plate 222 are respectively provided with the aforementioned flange 2112. During processing, the metal plate can be cut into shape, and then the edges of the metal plate can be folded to form the flange 2112, and the flange 2112 can be flattened. Then, the metal plate can be processed by stamping to form the first folded edge 240, the second folded edge 260, the first connecting plate 221, the second connecting plate 222, and the corresponding reinforcing structure.

[0096] Reference Figure 2 As shown, the fan 300 includes a motor 310 and a fan wheel 320. The motor 310 is connected to the support plate 210 through the mounting part 201, and the fan wheel 320 is connected to the drive shaft of the motor 310. The fan wheel 320 is a centrifugal fan wheel 320.

[0097] Referring to Figure 8, the outer peripheral wall of the motor 310 is provided with four mounting feet 311. The four mounting feet 311 are arranged at intervals along the circumference of the motor 310. In this embodiment, the motor 310 has a plastic-encapsulated shell. The outer peripheral wall of the plastic-encapsulated shell is also provided with heat dissipation ribs 312. The heat dissipation ribs 312 are distributed between adjacent mounting feet 311. The heat dissipation ribs 312, mounting feet 311 and plastic-encapsulated shell are integrally formed. Mounting part 201 is a boss 290 formed on the surface of support plate 210. Specifically, the boss 290 is formed by the recess of mounting surface 211 facing volute 101. The boss 290 is a cone-shaped platform. Mounting hole 291 is provided on the boss 290. Mounting hole 291 is used to limit the motor 310. Mounting hole 291 is roughly circular. The diameter of mounting hole 291 is slightly larger than the outer diameter of plastic encapsulation shell. The maximum outer diameter of the location of heat dissipation fin 312 and mounting foot 311 is larger than the diameter of mounting hole 291. Therefore, one end of plastic encapsulation shell can pass through mounting hole 291, but the other end cannot pass through mounting hole 291, so that heat dissipation fin 312 and mounting foot 311 are confined within air duct 110.

[0098] Reference Figure 11 As shown, the side wall of the volute 101 is provided with an installation port 140. The installation port 140 is located on the side of the volute 101 facing the bracket 200. When the volute 101 is installed on the bracket 200, the boss 290 can extend into the air duct 110 through the installation port 140, which facilitates connection with the fan 300.

[0099] In some embodiments, four fasteners 500 are provided on the end face 292 of the boss 290 facing the air duct 110. The four fasteners 500 are arranged circumferentially along the mounting hole 291, and each of the four fasteners 500 is connected to one of the four mounting feet 311. The fasteners 500 are fixedly connected to the boss 290, so that all four mounting feet 311 of the motor 310 are fixed, realizing the connection between the motor 310 and the bracket 200. Of course, the number of mounting feet 311 is not limited to four. The motor 310 may also be provided with three, five or more mounting feet 311, and the number of fasteners 500 is the same as the number of mounting feet 311.

[0100] Reference Figure 8 and Figure 9 As shown, in this embodiment, the fixing member 500 is a cylindrical elastic foot pad 400, made of rubber or other elastic materials, which can play a role in buffering and shock absorption. The elastic foot pad 400 has a first through hole 410 along its axial direction, and a second through hole 293 is provided on the end face 292 of the boss 290. Bolts are passed through the second through hole 293 and connected to the first through hole 410 to fix the elastic foot pad 400 to the boss 290. In this embodiment, the mounting foot 311 includes two opposing legs 3111, with a connecting groove formed between the two legs 3111. The elastic foot pad 400 is fixed to the connecting groove with an interference fit, providing stable support for the motor 310. Of course, the form of the mounting foot 311 is not limited to the above embodiment. In other embodiments, the mounting foot 311 may also have a through hole, and bolts are passed through the through hole, the first through hole 410, and the second through hole 293 to fix the mounting foot 311.

[0101] Considering that the installation of motor 310 requires the use of automated equipment during the production process, motor 310 needs a self-positioning structure 294 to meet the automation requirements. At the same time, it also eliminates the need for workers to manually align the motor 310 with the holes during manual screw driving, thus improving work efficiency.

[0102] Based on this, refer to Figure 9 and Figure 10 As shown, in some embodiments, the end face 292 of the boss 290 is provided with a positioning structure 294. The number of positioning structures 294 is the same as the number of elastic foot pads 400. The positioning structure 294 positions the fastener 500, which facilitates the bolts to pass through the first through hole 410 and the second through hole 293, enabling automated assembly and improving the installation efficiency of the motor 310.

[0103] The positioning structure 294 includes two positioning ribs 2941, which are integrally formed with the boss 290. The two positioning ribs 2941 are spaced apart and arranged circumferentially around the elastic foot pad 400. The positioning ribs 2941 extend beyond the end face 292 of the boss 290. Both positioning ribs 2941 abut against the outer wall of the elastic foot pad 400, thus positioning the elastic foot pad 400 quickly. It can be understood that the maximum distance between the two positioning ribs 2941 can be equal to the diameter of the elastic foot pad 400; when the two positioning ribs 2941 extend circumferentially around the elastic foot pad 400, the minimum distance between them can be less than the diameter of the elastic foot pad 400. The positioning ribs 2941 fit against the outer peripheral wall of the elastic foot pad 400, achieving effective positioning.

[0104] During installation, the elastic foot pad 400 is fixed on the mounting foot 311, and then the elastic foot pad 400 is positioned on the end face 292 of the boss 290 by the positioning rib 2941. Bolts are then used to pass through the elastic foot pad 400 and fix it to the boss 290 to achieve quick installation of the motor 310.

[0105] It is understandable that the number of positioning ribs 2941 is not limited to two; three or more positioning ribs 2941 can also be set. Multiple positioning ribs 2941 are arranged at intervals along the circumference of the elastic foot pad 400 to achieve an effective positioning effect.

[0106] In some other embodiments, the positioning structure 294 may include a positioning rib 2941, which extends circumferentially along the elastic foot pad 400 and abuts against the outer wall of the elastic foot pad 400. The positioning rib 2941 may extend circumferentially along the elastic foot pad 400 to form a circular or semi-circular shape, so that the positioning rib 2941 can effectively position the elastic foot pad 400.

[0107] Reference Figure 10 As shown, in order to improve the structural strength of the boss 290, a plurality of fourth reinforcing ribs 296 are provided on the end face 292 in the embodiment. The fourth reinforcing ribs 296 are arranged between adjacent positioning structures 294. The fourth reinforcing ribs 296 protrude from the end face 292 and are arranged along the circumference of the end face 292. The fourth reinforcing ribs 296 are arc-shaped, so that the load can be distributed more evenly on the end face 292, enhancing the overall rigidity and making the end face 292 less prone to deformation, thereby enhancing the load-bearing capacity and durability of the structure.

[0108] Understandably, a rounded corner is provided between the end face 292 and the inner wall of the mounting hole 291 to facilitate the motor 310 housing passing through the mounting hole 291 from one side of the end face 292. In some embodiments, the end face 292 is provided with a notch 295, which is formed in the inner wall of the mounting hole 291. The power cord of the motor 310 can pass through the notch 295 to exit the air duct 110, avoiding interference between the power cord and the bracket 200.

[0109] Reference Figure 10 and Figure 11 As shown, a first connecting hole 2113 is provided on the wall surface of the volute 101 facing the support plate 210. A second connecting hole 150 corresponding to the first connecting hole 2113 is provided on the support plate 210. In this embodiment, two first connecting holes 2113 and two second connecting holes 150 are provided. The two first connecting holes 2113 are spaced apart circumferentially along the mounting opening 140, and the two second connecting holes 150 are spaced apart circumferentially along the boss 290, so that the first connecting holes 2113 and the second connecting holes 150 are configured in a one-to-one correspondence. Fasteners are used to pass through the first connecting holes 2113 and the second connecting holes 150 for locking, thereby connecting the volute 101 to the bracket 200.

[0110] It should be noted that the air duct assembly 3000 in this embodiment of the present invention adopts a combination of foam volute 101 and sheet metal parts. Considering that the foam air duct 110 has a large deformation, it is not easy to accurately align the first connecting hole 2113 and the second connecting hole 150 after assembly. Moreover, the heat pump equipment 1000 is designed for ultra-low temperature heating scenarios. If metal screws are used for fixing, the heat conduction and cold transfer of the metal screws will cause the bracket 200 to easily frost and condense. Therefore, the fasteners used in this embodiment are plastic parts. Compared with metal fasteners, they can effectively reduce the problem of heat conduction and cold transfer, making it less likely for the bracket 200 to generate condensation.

[0111] Reference Figure 13 and Figure 14 As shown, specifically, the fastener includes a limiting head 510 and a latch 520. The limiting head 510 is a circular block structure, and the latch 520 is connected to one side of the limiting head 510. The latch 520 includes two claws, which are arranged opposite to each other and spaced apart along the circumference of the limiting head 510. The latch 520 is used to pass through the first connecting hole 2113 and the second connecting hole 150 for fastening. The size of the limiting head 510 is larger than the size of the first connecting hole 2113 and the second connecting hole 150, thus serving a limiting function. The limiting head 510 and the latch 520 can be an integral injection-molded structure, giving the latch 520 a certain degree of elasticity, facilitating fastening with the support plate 210.

[0112] Specifically, the claws are configured to pass through the first connecting hole 2113 and the second connecting hole 150 in sequence and engage with the support plate 210. That is, the two claws cooperate to have the function of a buckle 520. Since there is a gap between the two claws, under normal conditions, the maximum outer diameter of the buckle 520 is greater than the diameter of the first connecting hole 2113 and the second connecting hole 150.

[0113] Combination Figure 11 It can be understood that the fastener is installed on the inside of the air duct 110. When the claw passes through the first connecting hole 2113 and the second connecting hole 150 in sequence, the two claws will deform in the direction of the gap, that is, they will be close together in opposite directions. After the end of the claw passes through the second connecting hole 150, it is engaged with the support plate 210. At this time, the limiting head 510 abuts against the inner wall of the volute 101 and plays a limiting role. That is, one end of the fastener is fastened to the support plate 210 and the other end is pressed against the volute 101, thereby achieving the purpose of fastening the volute 101 and realizing the quick connection between the volute 101 and the support plate 210.

[0114] Reference Figure 14 As shown, each claw can have a latching function 520, meaning it can be individually latched to the support plate 210. When two claws are symmetrically latched to the support plate 210, the connection structure becomes more stable and reliable. Of course, the number of claws is not limited to two; three or more claws can be provided. For example, three claws can be spaced apart circumferentially along the limiting head 510, and after passing through the first connecting hole 2113 and the second connecting hole 150, they can simultaneously latch to the support plate 210.

[0115] Since the limit head 510 and the claws are both made of plastic, they have a lower thermal conductivity than metal, meaning they are less likely to transfer heat. This effectively reduces the amount of cold air transferred along the fasteners to the bracket 200, thus reducing the likelihood of condensation on the bracket 200.

[0116] Reference Figure 14As shown, the diameter of the first connecting hole 2113 is D1, and the diameter of the second connecting hole 150 is D2. The diameter D1 of the first connecting hole 2113 is larger than the diameter D2 of the second connecting hole 150, and smaller than the diameter D3 of the limiting head 510. The difference between D1 and D2 is at least greater than 1mm, that is, 1mm≤D1-D2<D3. When the difference between the diameters of the first connecting hole 2113 and the second connecting hole 150 is greater than 1mm, it can offset the deformation of the foam volute 101 and reduce the situation where the volute 101 blocks the second connecting hole 150 due to deformation. Conversely, when the difference between the diameters of the first connecting hole 2113 and the second connecting hole 150 is too small, the volute 101 is likely to block the second connecting hole 150 when the foam part deforms. For example, when the diameter of the second connecting hole 150 of the support plate 210 is 5 mm, the diameter of the first connecting hole 2113 on the volute 101 needs to be set to 6 mm, 7 mm or larger.

[0117] Reference Figure 14 As shown, in some embodiments, the diameter D3 of the limiting head 510 is larger than the diameter D1 of the first connecting hole 2113, and the difference between D3 and D1 is at least greater than 3mm, i.e., 1mm ≤ D3 - D1. This allows the limiting head 510 to offset the deformation of the volute 101, preventing the limiting head 510 from failing to cover the first connecting hole 2113. Furthermore, the larger the size of the limiting head 510, the easier it is to press against the sidewall of the volute 101, providing a large pressing surface and improving the stability of the volute 101 after it is fixed to the bracket 200. In some embodiments, the inner wall of the volute 101 is provided with a concave surface that matches the limiting head 510, allowing the limiting head 510 to be concealed within the concave surface and preventing it from protruding from the inner wall of the air duct 110.

[0118] Reference Figure 15 and Figure 16 As shown, the claw includes a connecting part 521 and a fastening part 522. One end of the connecting part 521 is connected to the limiting head 510, and the other end is connected to the fastening part 522. The outer wall of the fastening part 522 is provided with an undercut 5221 that fastens to the support plate 210. The connecting parts 521 of the two claws are arranged side by side, and the two undercuts 5221 are arranged back to back. After the claw passes through the first connecting hole 2113 and the second connecting hole 150 in sequence, the undercut 5221 is exposed on the surface of the support plate 210 and fastens to the side of the support plate 210 away from the volute 101.

[0119] The end of the fastening part 522 away from the connecting part 521 is provided with a guide slope 5222. The guide slope 5222 is set radially outward from the central axis of the buckle 520. The guide slope 5222 contacts the volute 101 and the support plate 210 to generate a squeezing force, so that the claws are pressed together in opposite directions, which makes it easier for the buckle 520 to pass through the first connecting hole 2113 and the second connecting hole 150.

[0120] Reference Figure 16 As shown, along the axial direction of the fastener, the maximum circumscribed circle diameter D5 of the snap-fit ​​520 at the connecting portion 521 is smaller than the minimum circumscribed circle diameter D6 of the fastening portion 522. In other words, the connecting portion 521 has a smaller diameter, i.e., it is more slender, compared to the fastening portion 522. Figure 14 It can be understood that when the fastener connects the volute 101 and the support plate 210, there is a greater distance between the connecting part 521 and the foam part, reducing the contact area between the claw and the foam part, making it easier for the buckle 520 to pass through the foam part, reducing the difficulty of operation, and also reducing heat conduction and cooling, and providing assembly tolerance.

[0121] In addition, the gap D4 between adjacent fastening parts 522 is greater than or equal to 3mm and smaller than the diameter D2 of the second connecting hole 150, i.e. 3mm≤D4<D2. This allows the buckle 5221 to have greater elasticity, and the fastening part 522 can pass through the first connecting hole 2113 and the second connecting hole 150 more smoothly, making the operation easier.

[0122] This utility model embodiment also provides a heat pump device 1000, which adopts the air duct assembly 3000 of the above embodiment.

[0123] Since the heat pump device 1000 adopts all the technical solutions of the air duct assembly 3000 of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0124] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A duct assembly, characterized in that, include: The air duct shell has an air duct, and the air duct shell is provided with an air inlet and an air outlet communicating with the air duct. The air duct shell is made of heat-insulating material. A fan is installed inside the air duct, and the fan includes a motor and a fan wheel connected to the motor; A bracket is attached to one side of the air duct housing; The air duct shell is provided with an installation port communicating with the air duct, and the bracket is provided with an installation part. The installation part passes through the installation port into the air duct shell and is fixedly connected to the motor.

2. The air duct assembly according to claim 1, characterized in that, The outer peripheral wall of the motor is provided with at least two mounting feet; the bracket includes a metal support plate, the mounting part is a boss formed on the surface of the support plate, the boss is provided with a positioning hole, one end of the motor with a drive shaft is set towards the air duct, the other end passes through the positioning hole, and the mounting feet are connected to the boss.

3. The air duct assembly according to claim 2, characterized in that, The positioning hole is formed on the end face of the boss away from the support plate. The end face is provided with at least two fixing members. The at least two fixing members are arranged circumferentially along the positioning hole and connected to the boss. The at least two mounting feet are connected to the at least two fixing members one by one.

4. The air duct assembly according to claim 3, characterized in that, The fixing component is an elastic foot pad, which is fixedly connected to the end face, and the mounting foot is connected to the elastic foot pad; the end face is provided with a positioning structure for positioning the elastic foot pad, which is used to position the elastic foot pad along the circumference of the elastic foot pad.

5. The air duct assembly according to claim 4, characterized in that, The positioning structure is provided in at least two parts, and each positioning structure includes at least one positioning rib; When the positioning structure is configured to have one positioning rib, the positioning rib extends circumferentially along the elastic foot pad and abuts against the outer wall of the elastic foot pad; or, when the positioning structure is configured to have two or more positioning ribs, the two or more positioning ribs are arranged at intervals circumferentially along the elastic foot pad and abut against the outer wall of the elastic foot pad respectively.

6. The air duct assembly according to claim 5, characterized in that, When the positioning structure is configured to have two or more positioning ribs, the minimum distance between adjacent positioning ribs is less than or equal to the diameter of the elastic foot pad.

7. The air duct assembly according to claim 4, characterized in that, The elastic foot pad is made of rubber.

8. The air duct assembly according to claim 3, characterized in that, The boss is a cone-shaped platform, and the end face is formed on the top surface of the cone-shaped platform. The end face is provided with at least two reinforcing ribs, and the at least two reinforcing ribs and at least two fixing members are arranged alternately along the circumference of the end face.

9. The air duct assembly according to claim 1, characterized in that, The duct housing is a volute made of foam material, the bracket is a metal part, and the duct assembly also includes fasteners made of plastic material. The fasteners pass through the bracket and the volute to fix the volute and the bracket in place.

10. A heat pump device, characterized in that, include: The housing has an air inlet and an air outlet, and the housing has a cavity communicating with the air inlet and the air outlet, and the cavity has a heat exchanger. The air duct assembly as described in any one of claims 1 to 9, wherein the air duct assembly is installed in the cavity, the heat exchanger is located between the air inlet and the air outlet, and the air outlet is connected to the air outlet.

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