Volute, fan and duct type air conditioner

Abstract

The utility model relates to the technical field of fans, and discloses a volute, a fan and a duct type air conditioner. The volute comprises a volute body provided with an air outlet, the volute body comprises an upper volute body and a lower volute body, and the upper volute body and the lower volute body are detachably connected; the volute tongue is arranged at the air outlet, and the volute tongue is detachably connected with the lower volute and / or the upper volute; the end face, facing the air outlet, of the volute tongue is a wavy face. According to the volute, the volute tongue in the volute can be replaced according to the requirements of machine types, the universality of the volute tongue is improved, noise reduction of the volute on each machine type is guaranteed, the cost is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fans, for example, to a volute, a fan and a duct fan. Background Art

[0002] A ducted air conditioner is a type of central air conditioning system that distributes air through a duct system. It consists of an indoor unit, an outdoor unit, and a duct system, and is widely used in commercial buildings, office buildings, hotels, hospitals, and other locations. The indoor unit of a ducted air conditioner is concealed within the ceiling, eliminating space and creating a cleaner and more aesthetically pleasing interior. This improves space utilization. Furthermore, through the duct system, ducted air conditioners can evenly distribute hot and cold air to each room, improving comfort. However, existing ducted air conditioners utilize centrifugal fans and volutes, resulting in high noise levels, poor airflow stability, and poor sound uniformity.

[0003] In the related art, in order to reduce noise, the volute of the centrifugal fan generally adds cavities and small holes at the tongue position of the volute to weaken the pressure pulsation and thus achieve noise reduction.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] In the related art, ducted air conditioner products generally use evaporators of different lengths and thicknesses to achieve corresponding capacities for different capacity segments, and different evaporators are generally matched with 1 to 2 types of volutes. The effect produced by different overall resistances corresponding to a single volute (mainly due to different evaporators) cannot reach the optimal effect, and there are differences in noise values ​​and sound quality. Therefore, the volute is not well adapted to different evaporators and cannot achieve the best effect.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a volute, a fan, and a duct fan to improve the adaptability of the volute and reduce the noise of the volute when used in different models.

[0009] An embodiment of the present disclosure provides a volute, which includes: a volute body, which is provided with an air outlet, and the volute body includes an upper volute and a lower volute, and the upper volute and the lower volute are detachably connected; a volute tongue, which is provided at the air outlet of the volute body, and is detachably connected to the lower volute and / or the upper volute; wherein the end surface of the volute tongue facing the air outlet is a wavy surface.

[0010] Optionally, the ratio of the maximum distance between two wave crests in the length direction of the wave surface to the length of the air outlet is 20%-30%; or, the ratio of the maximum height of the wave crest of the wave surface to the width of the air outlet is 10%-15%.

[0011] Optionally, the lower volute is connected to the volute tongue by snapping, screwing or magnetic attraction; and / or, the upper volute is connected to the volute tongue by snapping, screwing or magnetic attraction.

[0012] Optionally, the lower volute includes an air outlet side wall, which is located at the end of the length direction of the air outlet; the volute tongue includes a first side wall, which is located at the end of the length direction of the volute tongue, and the first side wall is located on the side of the air outlet side wall facing the air outlet, and the first side wall is detachably connected to the air outlet side wall.

[0013] Optionally, the lower volute also includes: a connecting plate, the first end of which is connected to the air outlet side wall and extends in a direction away from the upper volute, and the second end of the connecting plate is constructed with a hook; wherein, the wall surface of the first side wall away from the air outlet side wall is constructed with a buckle, and when the volute tongue is connected to the lower volute, the hook and the buckle are engaged.

[0014] Optionally, the air outlet side wall is constructed with one of the guide posts and the guide groove, and the first side wall is constructed with the other of the guide posts and the guide groove. When the lower volute is connected to the volute tongue, the guide post is located in the guide groove and can slide along the guide groove.

[0015] Optionally, the volute tongue includes: an air guide wall, which is arranged at the end of the air outlet close to the upper volute, and the wall surface of the air guide wall facing the air outlet is a wavy surface; two second side walls, which are connected at both ends of the air guide wall in the width direction; a reinforcing plate, which is arranged on the side of the air guide wall away from the air outlet, and the two ends of the reinforcing plate are connected to the two second side walls.

[0016] Optionally, a sink groove is formed at the end of the volute tongue facing the upper volute, and the sink groove extends along the circumference of the volute tongue;

[0017] The end of the upper volute facing the volute tongue is configured with a boss, and when the upper volute is connected to the volute tongue, the sink and the boss cooperate; and / or, the upper volute is clamped with the lower volute.

[0018] An embodiment of the present disclosure further provides a blower, comprising: a volute as described in any one of the above embodiments; and an impeller rotatably located in the volute.

[0019] The embodiments of the present disclosure further provide a duct air conditioner, which includes the fan as described in the above embodiments.

[0020] The volute, fan, and duct fan provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] The volute of the embodiment of the present disclosure is divided into a detachable upper volute and a lower volute, and the volute tongue is detachably connected to the upper volute and / or the lower volute. In this way, when the fan is installed on different models, there is no need to replace the entire fan and the volute body, only the volute tongue needs to be replaced, which can achieve the versatility of the volute. In addition, the end face of the volute tongue facing the air outlet is a wavy surface, which can effectively increase the outlet pressure of the air outlet, improve the resistance of the air flow, and ensure the stability of the air flow. In particular, it can reduce the vortex in the inefficient air outlet areas on the left and right sides of the volute outlet at high speeds, and effectively reduce noise. In this way, the volute tongue itself has the function of reducing noise, and through the detachable connection, the volute tongue in the volute can be replaced according to the needs of the model and the evaporator, thereby improving the versatility of the volute tongue, ensuring the noise reduction of the volute for each model, reducing costs, and improving the user experience.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0024] Figure 1 1 is a schematic structural diagram of a volute provided in an embodiment of the present disclosure;

[0025] Figure 2 is a schematic diagram of a partial structure of a volute provided in an embodiment of the present disclosure;

[0026] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part A;

[0027] Figure 4 This is a schematic structural diagram of a snail tongue from one perspective provided by an embodiment of the present disclosure;

[0028] Figure 5 is a schematic structural diagram of a snail tongue provided by an embodiment of the present disclosure from another perspective;

[0029] Figure 6 1 is a schematic structural diagram of a lower volute provided in an embodiment of the present disclosure;

[0030] Figure 71 is a schematic structural diagram of an upper volute provided in an embodiment of the present disclosure;

[0031] Figure 8 This is a schematic diagram of fluid simulation of a common volute;

[0032] Figure 9 is a flow simulation diagram of a volute provided by an embodiment of the present disclosure;

[0033] Figure 10 This is another schematic diagram of fluid simulation of a common volute;

[0034] Figure 11 It is a flow simulation diagram of another volute provided in an embodiment of the present disclosure.

[0035] Reference numerals:

[0036] 10. Lower volute; 101. Air outlet side wall; 102. Connecting plate; 103. Hook; 104. Guide column; 105. First latch hole; 106. Second latch protrusion; 20. Upper volute; 201. First latch protrusion; 202. Second latch hole; 203. Boss; 30. Air outlet; 40. Volute tongue; 401. Wave surface; 402. Air guide wall; 403. First side wall; 404. Second side wall; 405. Buckle; 406. Guide groove; 407. Reinforcement plate; 408. Sink. DETAILED DESCRIPTION

[0037] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0038] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that such terms are interchangeable where appropriate to describe the embodiments of the present disclosure. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0040] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0041] Unless otherwise stated, the term "plurality" means two or more.

[0042] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0044] The length and width of the air outlet are as follows Figure 1 shown.

[0045] Combine Figures 1 to 11 As shown, an embodiment of the present disclosure provides a volute, which includes a volute body and a volute tongue 40, the volute body includes an upper volute 20 and a lower volute 10, and the upper volute 20 and the lower volute 10 are detachably connected; the volute tongue 40 is arranged at the air outlet 30 of the volute body, and the volute tongue 40 is detachably connected to the upper volute 20 and / or the lower volute 10; wherein, the end face of the volute tongue 40 facing the air outlet 30 is a wavy surface 401.

[0046] In the embodiment of the present disclosure, the upper volute 20 and the lower volute 10 are detachably connected, and the volute tongue 40 is detachably connected to the upper volute and / or the lower volute 10, which improves the convenience of disassembly of the entire volute. In this way, when the fan is matched with different models, there is no need to replace the entire fan and the entire volute, only the volute tongue 40 needs to be replaced, which improves the versatility of the volute and reduces costs. In addition, if Figures 8 to 11 As shown, compared to Figure 8 and Figure 10 The end surface of the volute tongue 40 facing the air outlet 30 of the embodiment of the present disclosure is a wave surface 401, such as Figure 9 The wavy surface 401 causes the airflow on the surface of the volute tongue 40 to be split and converged toward the middle of the air outlet 30, reducing the airflow on both sides of the air outlet 30, effectively increasing the outlet pressure of the air outlet 30, improving the resistance of the airflow, and ensuring the stability of the airflow. Especially at high speeds, it can reduce the vortex in the inefficient air outlet areas on the left and right sides of the volute air outlet 30, effectively reducing noise. Moreover, compared to Figure 10 Ordinary volute, Figure 11 The volute with the wavy volute tongue has better airflow uniformity, which can effectively improve the heat exchange efficiency.

[0047] In addition, the volute tongue can be detachably connected to the upper volute, or detachably connected to the lower volute, or the volute tongue can be detachably connected to both the upper volute and the lower volute. Any connection method that can facilitate the detachment of the volute tongue belongs to an optional embodiment of the present application.

[0048] Optionally, the ratio of the maximum distance between two wave crests in the length direction of the wave surface 401 to the length of the air outlet 30 of the volute body is 20%-30%.

[0049] In the disclosed embodiment, when the ratio of the maximum distance between the two wave crests in the length direction of the wave surface 401 to the length of the air outlet 30 of the volute body is less than 20%, the length of the wave surface 401 is too small, the effect on the airflow is small, and the outlet pressure of the air outlet 30 cannot be effectively increased. When the ratio of the maximum distance between the two wave crests in the length direction of the wave surface 401 to the length of the air outlet 30 of the volute body is greater than 30%, the size of the wave surface 401 is too large, and the vortex on the left and right sides of the air outlet 30 cannot be effectively reduced, and the noise reduction effect is not obvious. Therefore, by setting the maximum distance between the two wave crests of the wave surface 401 within the above range, the airflow of the air outlet 30 is diverted at the wave surface 401 of the volute tongue 40, and the airflow can be converged to the middle area of ​​the air outlet 30, the airflow on both sides of the air outlet 30 is reduced, and the resistance of the airflow is improved. In particular, the vortex on both sides of the air outlet 30 at high speed can be reduced, reducing noise and achieving the best noise reduction effect.

[0050] Here, the maximum distance between two crests in the length direction of the wave surface 401 refers to the distance between the crests at the two ends of the wave surface 401 along the length direction.

[0051] Optionally, the ratio of the maximum distance between two wave crests in the length direction of the wave surface 401 to the length of the air outlet 30 of the volute body is 25%-30%.

[0052] For example, the ratio of the maximum distance between two wave crests in the length direction of the wave surface 401 to the length of the air outlet 30 of the volute body is 20%, 21%, 22%, 23%, 24%, 25%, 26%, 28%, 30%, etc.

[0053] Optionally, the ratio of the maximum height of the wave crest of the wave surface 401 to the width of the air outlet 30 of the volute body is 10%-15%.

[0054] In the disclosed embodiment, when the ratio of the maximum height of the wave crest of the wave surface 401 to the width of the air outlet 30 of the volute body is less than 10%, the wave crest height is too small and cannot effectively increase the outlet pressure of the air outlet 30, resulting in poor airflow diversion effect on the surface of the volute tongue 40 and failure to reduce the vortex on both sides of the air outlet 30. When the ratio of the maximum height of the wave crest of the wave surface 401 to the width of the air outlet 30 of the volute body is greater than 15%, the wave crest height of the wave surface 401 is too high, resulting in excessive airflow resistance at the air outlet 30, which affects the airflow volume. Therefore, by setting the height of the wave surface 401 within the above range, the airflow at the air outlet 30 is diverted at the wave surface 401 of the volute tongue 40, and the airflow can be converged to the middle area of ​​the air outlet 30, reducing the airflow on both sides of the air outlet 30, improving the airflow resistance, and particularly reducing the vortex on both sides of the air outlet 30 at high speeds, reducing noise, and achieving the best noise reduction effect.

[0055] Optionally, the ratio of the maximum height of the wave crest of the wave surface 401 to the width of the air outlet 30 of the volute body is 12%-15%.

[0056] For example, the ratio of the maximum height of the wave crest of the wave surface 401 to the width of the air outlet 30 of the volute body is 10%, 11%, 12%, 13%, 14%, 15%, etc.

[0057] Optionally, the lower volute 10 and the volute tongue 40 can be detachably connected by means of snap connection, screws or magnetism.

[0058] Optionally, the upper volute and the volute tongue are detachably connected by means of snap connection, screw connection or magnetic connection.

[0059] Optionally, when the lower volute is detachably connected to the volute tongue, the lower volute 10 includes an air outlet side wall 101, which is located at the end of the length direction of the air outlet 30; the volute tongue 40 includes a first side wall 403, which is located at the end of the length direction of the volute tongue 40, and the first side wall 403 is located on the side of the air outlet side wall 101 facing the air outlet 30, and the first side wall 403 is detachably connected to the air outlet side wall 101.

[0060] In the embodiment of the present disclosure, the air outlet side wall 101 of the lower volute 10 forms the two ends of the air outlet 30 in the length direction, and the first side wall 403 of the volute tongue 40 corresponds to the air outlet side wall 101 and is detachably connected. In this way, the lower volute 10 and the volute tongue 40 can be detachably connected, and the connection position will not affect the air outlet effect.

[0061] Alternatively, as Figures 2 to 6 As shown, the first side wall 403 is engaged with the air outlet side wall 101 .

[0062] Optionally, one of the first side wall 403 and the air outlet side wall 101 is provided with a hook 103, and the other of the first side wall 403 and the air outlet side wall 101 is provided with a buckle 405 adapted to the hook 103. When the hook 103 and the buckle 405 are engaged, the lower volute 10 and the volute tongue 40 are connected.

[0063] In the embodiment of the present disclosure, the first side wall 403 and the air outlet side wall 101 are detachably connected by the hook 103 and the buckle 405, so there is no need to set up additional connecting parts for connection. Moreover, the structure of the hook 103 and the buckle 405 facilitates the connection and disassembly of the lower volute 10 and the volute tongue 40, and thus facilitates the replacement of the volute tongue 40.

[0064] Optionally, the lower volute 10 also includes a connecting plate 102, the first end of the connecting plate 102 is connected to the air outlet side wall 101 and extends in a direction away from the upper volute 20, and the second end of the connecting plate 102 is constructed with a hook 103; wherein, the wall surface of the first side wall 403 away from the air outlet side wall 101 is constructed with a buckle 405, and when the volute tongue 40 is connected to the lower volute 10, the hook 103 is connected to the buckle 405.

[0065] In the embodiment of the present disclosure, the connecting plate 102 extends from the air outlet side wall 101 in a direction away from the upper volute 20, so that the second end of the connecting plate 102 can be connected with the volute tongue 40, and the first side wall 403 of the volute tongue 40 is constructed with a buckle 405, so that when the hook 103 is connected to the buckle 405, the volute tongue 40 is connected to the lower volute 10.

[0066] Optionally, the connecting plate 102 includes a first connecting arm and a second connecting arm, the first connecting arm is connected to the air outlet side wall 101, and the first connecting arm extends along the length direction of the air outlet 30, one end of the second connecting arm is connected to the first connecting arm, and the second connecting arm extends along the width direction of the air outlet 30 in a direction away from the upper volute 20, and the second end of the second connecting arm extends from the direction toward the air outlet side wall 101 to form a hook 103, and the connecting plate 102 forms a connecting groove with the air outlet side wall 101.

[0067] Optionally, the first side wall 403 is located on the side of the lower volute 10 body facing the air outlet 30, and the first side wall 403 corresponds to the air outlet side wall 101, and the buckle 405 protrudes from the side of the first side wall 403 away from the air outlet side wall 101, so that when the hook 103 is engaged with the buckle 405, part of the first side wall 403 is located in the engaging groove, which can also improve the connection stability between the volute tongue 40 and the lower volute 10.

[0068] Optionally, a portion of the first side wall 403 protrudes in a direction away from the air outlet side wall 101 to form a buckle 405 .

[0069] Optionally, the buckle 405 is tilted away from the first side wall 403. This can increase the connection area between the buckle 405 and the hook 103, thereby improving the connection stability.

[0070] Optionally, the air outlet side wall 101 is constructed with a guide column 104 and a guide groove 406, and the first side wall 403 is constructed with another guide column 104 and a guide groove 406. When the lower volute 10 is connected to the volute tongue 40, the guide column 104 is located in the guide groove 406 and can slide along the guide groove 406.

[0071] In the embodiment of the present disclosure, when the lower volute 10 and the volute tongue 40 are assembled, the guide column 104 can slide along the guide groove 406, so that the guide column 104 and the guide groove 406 can play a positioning and guiding role. In this way, when the guide column 104 and the guide groove 406 cooperate with each other, they can also play a limiting role in the front and rear directions, which can prevent the volute tongue 40 from being displaced by the forward force of the wind during the operation of the fan, thereby ensuring the stability of the volute tongue 40.

[0072] Optionally, the guide groove 406 extends along the width direction of the air outlet 30 , and the guide column 104 matches the guide groove 406 .

[0073] Optionally, the volute tongue 40 includes an air guide wall 402 and a first side wall 403. The air guide wall 402 is arranged at the end of the air outlet 30 close to the upper volute 20, and part of the air guide wall 402 protrudes toward the lower volute 10 to form a wavy surface 401; there are two first side walls 403, which are connected on both sides of the length direction of the air guide wall 402, and the first side wall 403 is detachably connected to the lower volute tongue 40.

[0074] In the disclosed embodiment, an air guide wall 402 is provided at the end of the air outlet 30 near the upper volute 20, and the air guide wall 402 forms a wave surface 401 on the end surface facing the lower volute 10. This ensures the air outlet area of ​​the air outlet 30, and the air outlet of the air outlet 30 can be affected by the wave surface 401, thereby increasing the air outlet pressure, allowing the airflow to converge toward the center of the air outlet 30, improving the airflow resistance, reducing the vortex at the positions on both sides of the air outlet 30, and thus effectively reducing noise. The two first side walls 403 in the longitudinal direction of the air guide wall 402 are detachably connected to the lower volute tongue 40, so that the connection between the volute tongue 40 and the lower volute 10 does not affect the air outlet, ensuring the smoothness of the air outlet.

[0075] Optionally, both first sidewalls 403 are provided with slots, and both opposing first sidewalls 403 of the lower volute 10 are provided with hooks 103, with the number of hooks 103 being the same as the number of slots and corresponding one to one. In this way, the volute tongues 40 at both ends of the air outlet 30 in the longitudinal direction can be connected to the lower volute 10, thereby improving the connection stability between the volute tongues 40 and the lower volute 10.

[0076] Optionally, both first side walls 403 are provided with guide grooves 406, and the number of guide columns 104 and guide grooves 406 are the same and correspond one to one, so that when the volute tongue 40 is assembled with the lower volute 10, both ends of the air outlet 30 in the length direction can be guided and positioned by the guide columns 104 and the guide grooves 406.

[0077] Optionally, a portion of the wind guide wall 402 protrudes toward the lower volute 10 to form a wavy surface 401.

[0078] Optionally, the volute tongue 40 also includes a second side wall 404 and a reinforcement plate 407, the number of the second side walls 404 is two, and the second side walls 404 are connected to the two ends of the wind guide wall 402 in the width direction; the reinforcement plate 407 is arranged on the side of the wind guide wall 402 away from the lower volute 10, and the two ends of the reinforcement plate 407 are connected to the two second side walls 404.

[0079] In the disclosed embodiment, a reinforcing plate 407 is provided on the wall of the volute tongue 40 facing away from the air outlet 30 . The reinforcing plate 407 can increase the strength of the volute tongue 40 , thereby causing the volute tongue 40 to bend and deform when air is discharged from the air outlet 30 .

[0080] Optionally, there are multiple reinforcing plates 407 , and the multiple reinforcing plates 407 are sequentially spaced apart along the length direction of the volute tongue 40 .

[0081] In the embodiment of the present disclosure, the reinforcing plate 407 is arranged between the two first side walls 403, and multiple reinforcing plates 407 are arranged in sequence and spaced apart between the two first side walls 403 along the length direction of the snail tongue 40, which can improve the strength of the snail tongue 40 and prevent the snail tongue 40 from deformation.

[0082] Optionally, a recess 408 is constructed at the end of the volute tongue 40 facing the upper volute 20, and the recess 408 extends along the circumference of the volute tongue 40; a boss 203 is constructed at the end of the upper volute 20 facing the volute tongue 40, and when the upper volute 20 and the volute tongue 40 are connected, the recess 408 cooperates with the boss 203.

[0083] In the embodiment of the present disclosure, the groove 408 of the volute tongue 40 can cooperate with the boss 203 of the upper volute 20. In this way, when the upper volute 20 is connected to the volute tongue 40, the difference in height between the groove 408 and the boss 203 can play a sealing role, ensuring that the connection between the upper volute 20 and the volute tongue 40 is sealed to avoid air leakage.

[0084] Optionally, the sink groove 408 extends in an annular shape along the circumference of the volute tongue 40 , and the boss 203 is annular and corresponds to the sink groove 408 .

[0085] Optionally, when the upper volute and the volute tongue are detachably connected, the end of the volute tongue 40 facing the upper volute 20 and the end of the upper volute 20 facing the volute tongue 40 can be connected by snapping or magnetism, or the end of the volute tongue 40 facing the upper volute 20 and the end of the upper volute 20 facing the volute tongue 40 are both provided with connecting edges, and the two connecting edges are connected by screws.

[0086] Alternatively, as Figure 6 and Figure 7 As shown, the upper volute 20 is snap-connected with the lower volute 10 .

[0087] In the embodiment of the present disclosure, the upper volute 20 and the lower volute 10 are detachably connected by a snap-fit ​​method, which facilitates the disassembly and installation of the upper volute 20 and the lower volute 10, and further facilitates the disassembly and installation of the volute tongue 40.

[0088] Optionally, the lower volute 10 is provided with a locking hole, and the upper volute 20 is provided with a locking protrusion. When the upper volute 20 and the lower volute 10 are connected, the locking protrusion is inserted into the locking hole.

[0089] Optionally, the number of the locking protrusions and the locking holes are the same and correspond one to one.

[0090] Optionally, there are multiple latching holes, including a first latching hole 105, which is provided on the side wall of the lower volute 10, and the first latching hole 105 and the hook 103 are located on two opposite wall surfaces of the side wall of the lower volute 10. The multiple latching protrusions include a first latching protrusion 201, and the number of the first latching protrusions 201 is the same as that of the first latching holes 105 and corresponds one to one.

[0091] Optionally, the multiple card holes also include a second card hole 202, and the multiple card protrusions include a second card protrusion 106. The number of second card protrusions 106 is the same as that of the second card holes 202 and corresponds one to one. The upper volute 20 and the lower volute 10 enclose a cavity with an air inlet and an air outlet 30. The second card hole 202 is located at the end of the upper volute 20 opposite to the air outlet 30, and the number of the second card holes 202 is two. The two second card holes 202 are respectively located at the two ends of the upper volute 20 in the thickness direction. The number of the second card holes 202 is the same as that of the second card protrusions 106 and corresponds one to one.

[0092] An embodiment of the present disclosure further provides a fan, which includes the volute of any one of the above embodiments.

[0093] The blower provided by the embodiment of the present disclosure includes the volute of any one of the above embodiments, and thus has the beneficial effects of the volute of any one of the above embodiments, which will not be described in detail here.

[0094] Optionally, the fan further includes an impeller, which is rotatably disposed in the volute. When the impeller rotates, it can drive the air flow from the air inlet to the air outlet 30 and out of the air outlet 30.

[0095] Optionally, the fan is a centrifugal fan.

[0096] An embodiment of the present disclosure further provides a duct air conditioner, which includes a fan as described in any of the above embodiments.

[0097] The duct air conditioner provided in the embodiments of the present disclosure includes the fan of any one of the above embodiments, and thus has the beneficial effects of the fan of any one of the above embodiments, which will not be described in detail here.

[0098] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A volute, characterized in that: include: The volute body is provided with an air outlet, and the volute body comprises an upper volute and a lower volute, and the upper volute and the lower volute are detachably connected; The volute tongue is provided at the air outlet and is detachably connected to the lower volute and / or the upper volute; The end surface of the volute tongue facing the air outlet is a wavy surface.

2. The volute according to claim 1, characterized in that The ratio of the maximum distance between two wave crests in the length direction of the wave surface to the length of the air outlet is 20%-30%; or, The ratio of the maximum height of the wave crest of the wave surface to the width of the air outlet is 10%-15%.

3. The volute according to claim 1, characterized in that The lower volute is connected to the volute tongue by snapping, screwing or magnetic attraction; and / or, The upper volute is connected to the volute tongue by snapping, screwing or magnetic attraction.

4. The volute according to claim 1, characterized in that The lower volute includes an air outlet side wall, which is located at the end of the air outlet in the length direction; The snail tongue includes a first side wall, which is located at the end of the snail tongue in the length direction, and the first side wall is located on the side of the air outlet side wall facing the air outlet, and the first side wall is detachably connected to the air outlet side wall.

5. The volute according to claim 4, characterized in that The lower volute also includes: A connecting plate, the first end of which is connected to the air outlet side wall and extends in a direction away from the upper volute, and the second end of which is configured with a hook; Among them, a wall surface of the first side wall facing away from the air outlet side wall is structured with a buckle, and when the volute tongue is connected to the lower volute, the hook and the buckle are locked.

6. The volute according to claim 3, characterized in that The air outlet side wall is constructed with one of a guide column and a guide groove, and the first side wall is constructed with the other of a guide column and a guide groove. When the lower volute is connected to the volute tongue, the guide column is located in the guide groove and can slide along the guide groove.

7. The volute according to claim 1, characterized in that The snail tongue includes: The wind guide wall is provided at the end of the air outlet close to the upper volute, and the wall surface of the wind guide wall facing the air outlet is a wavy surface; There are two second side walls connected to both ends of the wind guide wall in the width direction; The reinforcing plate is arranged on a side of the air guide wall away from the air outlet, and two ends of the reinforcing plate are connected to the two second side walls.

8. The volute according to any one of claims 1 to 7, characterized in that The end of the volute tongue facing the upper volute is configured with a sinking groove, which extends along the circumference of the volute tongue; The end of the upper volute facing the volute tongue is configured with a boss, and when the upper volute is connected to the volute tongue, the sink and the boss cooperate; and / or, The upper volute is snap-connected with the lower volute.

9. A fan, characterized in that: include: The volute according to any one of claims 1 to 8; An impeller is rotatably located in the volute.

10. A duct machine, characterized in that: Comprising the fan as claimed in claim 9.

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