Ducted fan

Abstract

The application discloses a ducted air conditioner, which comprises a fresh air module, the fresh air module comprises a shell, a fan, a ventilation cavity and a filter screen assembly, when the fresh air module is in a fresh air mode, a first air outlet of the shell and a third air outlet of the ventilation cavity are in an open state, a second air outlet of the shell and a fourth air outlet of the ventilation cavity are in a closed state, fresh air from outdoors enters indoors through the ventilation cavity, the third air outlet, the filter screen assembly, the fan and the first air outlet in sequence; when the fresh air module is in an exhaust mode, the first air outlet and the third air outlet are in a closed state, the second air outlet and the fourth air outlet are in an open state, air in the room is exhausted outdoors through the second air outlet, the fan, the fourth air outlet and the ventilation cavity in sequence; a bottom wall of the shell is provided with an arc-shaped pull-out opening extending along the circumference of the fan wheel; the filter screen assembly is in an arc shape matched with the shape of the pull-out opening, the filter screen assembly is movably arranged in the shell through the pull-out opening, the filter screen assembly can block the pull-out opening and is partially exposed to the shell.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and in particular to a duct air conditioner. Background Technology

[0002] A ducted air conditioner indoor unit, or simply a ducted unit, is a type of air conditioner that is typically installed inside a suspended ceiling to supply air into the room for heat exchange. With the continuous optimization of air conditioner performance, many existing ducted units are now equipped with a fresh air module. This module introduces fresh outdoor air into the indoor environment to supplement the indoor air volume, thereby improving indoor air quality.

[0003] Typically, fresh air modules are equipped with a filter to remove dust, lint, and other airborne impurities, ensuring the quality of the fresh air. Since fresh air filters can become clogged over time, they need to be replaced regularly to maintain their effectiveness.

[0004] However, in the fresh air modules of related technologies, when disassembling or installing the filter, it is usually necessary to first remove the inspection cover before disassembling or installing the filter, which makes the filter installation and removal process cumbersome and inconvenient for regular filter replacement. Utility Model Content

[0005] This application discloses a ducted air conditioner that simplifies the disassembly and assembly process of the filter components of the fresh air module, improves the ease of replacing the filter components, and saves time and effort.

[0006] To achieve the above objectives, this application discloses a ducted air conditioning unit, which includes a fresh air module, the fresh air module comprising: The outer casing has an openable and closable first air vent and a second air vent. The fan includes: A volute, disposed within the outer shell, the volute having an air inlet and an air outlet, at least one of the air outlet and the first air outlet being openable and closable; The wind turbine is disposed inside the volute. A ventilation cavity is formed within the volute and has an openable and closable third and fourth air vents. A filter assembly is disposed inside the housing, and in the direction of fresh air flow from the third air inlet to the impeller, the filter assembly is located between the third air inlet and the air inlet of the impeller. When the fresh air module is in fresh air mode, the first air vent and / or the air outlet are in the open state, the third air vent is in the open state, and the second air vent and the fourth air vent are in the closed state. Outdoor fresh air enters the room sequentially through the ventilation cavity, the third air vent, the filter assembly, the air inlet, the impeller, the air outlet and the first air vent. When the fresh air module is in exhaust mode, the first air vent and / or the air outlet is closed, the third air vent is closed, and the second air vent and the fourth air vent are open. The indoor air is discharged to the outside through the second air vent, the air inlet, the impeller, the air outlet, the fourth air vent and the ventilation cavity in sequence. The outer casing has a pull-out opening on the bottom wall along the axial direction of the wind turbine, and the pull-out opening is an arc-shaped opening extending along the circumference of the wind turbine. The filter assembly is arc-shaped to match the shape of the pull-out opening. The filter assembly is movably and detachably installed inside the housing through the pull-out opening, and the filter assembly can block the pull-out opening, with a portion exposed outside the housing.

[0007] In the duct air conditioner provided in this application embodiment, a pull-out port is provided on the bottom wall of the outer casing, and the filter assembly is movably and detachably installed inside the outer casing by passing through the pull-out port. When the filter assembly is inserted into the outer casing from the pull-out port, the filter assembly blocks the pull-out port, and part of the filter assembly is located outside the outer casing. Therefore, when it is necessary to disassemble or install the filter assembly, the filter assembly can be quickly disassembled or installed by pulling along the axial direction of the impeller by acting on the part of the filter assembly exposed outside the outer casing. That is, the operator can perform the disassembly and installation of the filter assembly outside the fresh air module without removing the inspection cover first. The operation is very simple and convenient, greatly simplifying the disassembly and installation process of the filter assembly, enabling quick replacement of the filter assembly, improving the convenience of filter replacement, and saving time and effort. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of the fresh air module disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the fresh air module disclosed in the embodiments of this application from another perspective; Figure 3This is a structural schematic diagram of the fresh air module disclosed in the embodiments of this application from another perspective; Figure 4 The fresh air module disclosed in this application embodiment is along Figure 3 One of the three-dimensional sectional views along the AA direction; Figure 5 The fresh air module disclosed in this application embodiment is along Figure 3 The second three-dimensional sectional view along the AA direction; Figure 6 The fresh air module disclosed in this application embodiment is along Figure 3 A three-dimensional sectional view along the BB direction; Figure 7 yes Figure 6 Top view; Figure 8 This is an exploded structural diagram of the fresh air module disclosed in the embodiments of this application; Figure 9 This is a top view of the fresh air module disclosed in the embodiments of this application; Figure 10 The fresh air module disclosed in the embodiments of this application is along Figure 9 A three-dimensional sectional view along the CC direction; Figure 11 yes Figure 10 A magnified view of point M in the image; Figure 12 yes Figure 10 A magnified view of point N in the image; Figure 13 This is a schematic diagram of the structure of the filter assembly disclosed in the embodiments of this application; Figure 14 This is a schematic diagram of the filter assembly disclosed in the embodiments of this application from another perspective; Figure 15 This is another structural schematic diagram of the fresh air module disclosed in the embodiments of this application; Figure 16 The fresh air module disclosed in this application embodiment is along Figure 15 A cross-sectional view along the DD direction in the middle; Figure 17 yes Figure 16 A magnified view of point O in the image; Figure 18 yes Figure 16 A magnified view of point P in the image; Figure 19 The fresh air module disclosed in the embodiments of this application is along Figure 15 A three-dimensional sectional view along the EE direction in the image; Figure 20 yes Figure 19 A magnified view of point Q in the image; Figure 21yes Figure 19 A magnified view of point T in the image.

[0010] Explanation of main figure symbols 100 - Fresh air module; 11 - Housing; 11a - First sidewall; 11b - Second sidewall; 111 - First air outlet; 112 - Second air outlet; 113 - Pull-out opening; 114 - Flange; 115 - Stepped portion; 1151 - Axial portion; 1152 - Radial portion; 116 - Slot; 117 - Second threaded hole; 118 - Second guide; 12 - Fan; 121 - Volute; 1211 - Air inlet; 1212 - Air outlet; 1213 - First protrusion; 122 - Impeller; 13 - Ventilation cavity; 131 - Third air outlet; 132 - Fourth air outlet; 14 - Filter assembly; 14a - First end; 14b - Second end; 14c - 14d - Second side; 14e - First circumferential side; 14f - Second circumferential side; 141 - Handle; 142 - First buckle; 142a - First sub-buckle; 142b - Second sub-buckle; 143 - Connecting plate; 1431 - Second buckle; 1431a - Third sub-buckle; 1432 - First threaded hole; 144 - Filter structure; 1441 - Filter frame; 1442 - Filter screen; 145 - Threaded locking element; 1451 - First rib; 1452 - Second rib; 146 - Second protrusion; 147 - First guide element; 15 - Duct connector; 16 - Sealing element; 17 - First windbreak element; 18 - Second windbreak element. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this application clearer, the exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments. That is, the specific embodiments described herein are merely used to explain this application and are not intended to limit this application.

[0012] It should be noted that the brief descriptions of terminology used in this application are merely for the purpose of facilitating understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0013] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0014] The terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first snap-fit ​​may be referred to as a second snap-fit, and similarly, a second snap-fit ​​may be referred to as a first snap-fit. Both the first snap-fit ​​and the second snap-fit ​​are snap-fits, but they are not the same snap-fit.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0017] In the description of this application, it should be noted that the singular forms of "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that terms such as "comprising / including" or "having" specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof.

[0018] In addition, the term "and / or" as used in this specification includes any and all combinations of the related listed items. For example, A and / or B can mean: A alone, A and B together, or B alone. That is, the term "and / or" as used in this specification includes any and all combinations of the related listed items.

[0019] Ductless air conditioners are short for central air conditioning duct-type indoor units. They are a type of concealed air conditioning indoor unit that solves the problem of exposed wall-mounted and floor-standing units affecting aesthetics. At the same time, the duct length is longer than that of ordinary household air conditioners, making installation more flexible. It is a new type of air conditioner.

[0020] To improve indoor air quality, ducted air conditioners are usually equipped with a fresh air module to introduce fresh outdoor air into the indoor environment, supplementing the indoor air supply. At the same time, to meet users' requirements for the quality of the incoming fresh air, the fresh air module is generally equipped with a filter to filter the incoming fresh air. During use, the filter needs to be replaced regularly to ensure its filtration effect.

[0021] However, installing or removing the filter requires a considerable amount of time to handle screws and sheet metal parts, which is time-consuming and inconvenient, affecting filter replacement. Furthermore, removing or installing the filter usually requires first removing the access cover, making the process cumbersome. In other words, to remove or install the filter, the access cover must be removed first before manually removing the filter from the fresh air module, then the new filter must be installed, and finally the fresh air module must be secured with screws, making the filter removal and installation process quite troublesome.

[0022] In addition, during the disassembly and assembly process, users may find that the connection between the access cover and the outer shell of the fresh air module is not properly sealed, resulting in air leakage. This can cause condensation and dripping water at the connection between the access cover and the outer shell in low temperature and high humidity environments, leading to user dissatisfaction.

[0023] In addition, most fresh air modules, like ducted air conditioners, are ceiling-mounted, which means that removing and installing the filter requires climbing to a height. Since the filter is a part that is replaced frequently, the inconvenience of removing and installing the filter can easily lead to user dissatisfaction.

[0024] In view of this, the present application provides a duct air conditioner that can improve the convenience of replacing the filter assembly. In the fresh air module of the duct air conditioner, it is not necessary to remove the inspection cover before disassembling the filter assembly. Therefore, it can avoid the situation where the inspection cover is not sealed properly due to improper disassembly and assembly by the user, which can easily cause condensation and dripping water at the inspection cover in low temperature and high humidity environment.

[0025] In this application, the ducted air conditioner is the indoor unit of an air conditioner, and its working principle is the same as that of other air conditioners (such as the indoor unit of a wall-mounted air conditioner or a floor-standing air conditioner).

[0026] In other words, an air conditioner typically consists of a duct unit (i.e., an indoor unit) and an outdoor unit. The air conditioner performs a refrigeration cycle in the indoor unit by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0027] The compressor compresses the refrigerant gas at a low temperature and low pressure, discharging it as a high temperature and high pressure gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0028] The expansion valve causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the ducted air conditioner can regulate the temperature of the indoor space.

[0029] The outdoor unit of an air conditioner includes the compressor and outdoor heat exchanger of the refrigeration cycle, while the indoor unit includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0030] Indoor and outdoor heat exchangers can be used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the ducted air conditioner is used as a heater in heating mode. When the indoor heat exchanger is used as an evaporator, the ducted air conditioner is used as a cooler in cooling mode.

[0031] In some embodiments, in order to improve indoor air quality, ducted air conditioners typically have a fresh air function, for example, the ducted air conditioner integrates a fresh air module, that is, the ducted air conditioner includes a fresh air module.

[0032] For example, a ducted air conditioning unit may include a main unit and a fresh air module connected to the main unit. The main unit is the indoor unit mentioned above.

[0033] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Please see Figure 1 and Figure 2 The fresh air module 100 provided in this application embodiment includes a housing 11, which serves as an external protective component for the fresh air module 100. Its internal space can be used to accommodate various functional devices of the fresh air module 100, such as the fan and filter assembly mentioned later.

[0035] The outer casing 11 has a first air vent 111.

[0036] like Figure 3 and Figure 4 As shown, in some embodiments, the fresh air module 100 provided in this application includes a fan 12 and a ventilation cavity 13.

[0037] like Figure 4 and Figure 5 As shown in this application, the fan 12 may include a volute 121 and a fan wheel 122. The volute 121 is disposed inside the outer casing 11 and has an air inlet 1211 and an air outlet 1212. The air outlet 1212 can communicate with the first air outlet 111. The fan wheel 122 is disposed inside the volute 121.

[0038] In this application, a ventilation cavity 13 is formed within the volute 121 and communicates with the outside, and the ventilation cavity 13 has a third air outlet 131 communicating with the air inlet 1211. Thus, when the impeller 122 is running, fresh air from the outside can sequentially enter the room through the ventilation cavity 13, the third air outlet 131, the air inlet 1211, the impeller 122, the air outlet 1212, and the first air outlet 111 to keep the indoor air fresh.

[0039] Combination Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, at least one of the first air vent 111 and the air outlet 1212 is openable and closable. That is, only the first air vent 111, only the air outlet 1212, or both the first air vent 111 and the air outlet 1212 can be opened and closed. Normally, whether the first air vent 111, the air outlet 1212, or both are openable and closable, once at least one of them is closed, outdoor fresh air usually cannot enter the room. However, when both the first air vent 111 and the air outlet 1212 are openable and closable, both the first air vent 111 and the air outlet 1212 need to be open for outdoor fresh air to enter the room. Moreover, the third air vent 131 is openable and closable, the outer casing 11 also has an openable and closable second air vent 112, and the ventilation cavity 13 also has an openable and closable fourth air vent 132.

[0040] When only the first air vent 111 can be opened and closed among the first air vent 111 and the air outlet 1212, in the fresh air module 100 in fresh air mode, the first air vent 111 and the third air vent 131 are open, and the second air vent 112 and the fourth air vent 132 are closed. Outdoor fresh air enters the room sequentially through the ventilation cavity 13, the third air vent 131, the air inlet 1211, the impeller 122, the air outlet 1212, and the first air vent 111. In the fresh air module 100 in exhaust mode, the first air vent 111 and the third air vent 131 are closed, and the second air vent 112 and the fourth air vent 132 are open. Indoor air is exhausted to the outside sequentially through the second air vent 112, the air inlet 1211, the impeller 122, the air outlet 1212, the fourth air vent 132, and the ventilation cavity 13.

[0041] When only the air outlet 1212 can be opened and closed among the first air outlet 111 and the air outlet 1212, when the fresh air module 100 is in fresh air mode, the air outlet 1212 and the third air outlet 131 are in the open state, and the second air outlet 112 and the fourth air outlet 132 are in the closed state. The fresh air from the outside enters the room sequentially through the ventilation cavity 13, the third air outlet 131, the air inlet 1211, the impeller 122, the air outlet 1212 and the first air outlet 111. When the fresh air module 100 is in exhaust mode, the air outlet 1212 and the third air outlet 131 are in the closed state, and the second air outlet 112 and the fourth air outlet 132 are in the open state. The air in the room is exhausted to the outside sequentially through the second air outlet 112, the air inlet 1211, the impeller 122, the air outlet 1212, the fourth air outlet 132 and the ventilation cavity 13.

[0042] When both the first air vent 111 and the air outlet 1212 can be opened and closed, in the fresh air module 100 in fresh air mode, the first air vent 111, the air outlet 1212 and the third air vent 131 are in the open state, and the second air vent 112 and the fourth air vent 132 are in the closed state. The fresh air from outside enters the room sequentially through the ventilation cavity 13, the third air vent 131, the air inlet 1211, the impeller 122, the air outlet 1212 and the first air vent 111. In the fresh air module 100 in exhaust mode, the first air vent 111, the air outlet 1212 and the third air vent 131 are in the closed state, and the second air vent 112 and the fourth air vent 132 are in the open state. The air in the room is exhausted to the outside sequentially through the second air vent 112, the air inlet 1211, the impeller 122, the air outlet 1212, the fourth air vent 132 and the ventilation cavity 13.

[0043] Taking the example where only the air outlet 1212 can be opened and closed among the first air vent 111 and the air outlet 1212, when fresh air needs to be introduced, the impeller 122 is activated. At this time, the air outlet 1212 and the third air vent 131 are in the open state, while the second air vent 112 and the fourth air vent 132 are in the closed state. The fresh outdoor air enters the room sequentially through the ventilation cavity 13, the third air vent 131, the air inlet 1211, the impeller 122, the air outlet 1212, and the first air vent 111, thereby improving the indoor air quality. To improve indoor air quality and enhance user comfort, when ventilation is required, the impeller 122 is activated. At this time, the air outlet 1212 and the third air outlet 131 are closed, while the second air outlet 112 and the fourth air outlet 132 are open. Indoor air is sequentially exhausted outdoors through the second air outlet 112, the air inlet 1211, the impeller 122, the air outlet 1212, the fourth air outlet 132, and the ventilation cavity 13, thereby improving indoor air quality, effectively reducing the concentration of harmful gases indoors, and enhancing user comfort.

[0044] By opening and closing the air outlet 1212, the second air outlet 112, the third air outlet 131, and the fourth air outlet 132, the fresh air module 100 can switch between fresh air mode and exhaust air mode. Only one ventilation cavity 13 and one fan 12 are needed to form a set of air duct system, which can deliver fresh outdoor air to the room and exhaust indoor stale air in a timely manner. The structure is simple, which reduces costs and volume, reduces the space occupied by the fresh air module 100, and facilitates installation and layout.

[0045] Optionally, a third air vent 131 may be formed on the surface of the volute 121 facing the bottom wall of the outer casing 11.

[0046] In some embodiments, to facilitate the introduction of fresh outdoor air into the room and the exhaust of stale indoor air to the outside, the fresh air module 100 further includes a duct connector 15 disposed on the housing 11. This duct connector 15 communicates with the ventilation cavity 13, meaning that an external fresh air duct (not shown) can be installed on the duct connector 15 to connect the fresh air duct to the ventilation cavity 13. Extending the length of the ventilation cavity 13 via the fresh air duct ensures that the fresh air module 100 can be applied to different areas. The fresh air duct extends outdoors to connect the ventilation cavity 13 with the outdoor environment.

[0047] In some embodiments, rotatable sealing members 16 may be provided at the air outlet 1212, the second air outlet 112, the third air outlet 131 and the fourth air outlet 132 respectively, so that the opening and closing of the air outlet 1212, the second air outlet 112, the third air outlet 131 and the fourth air outlet 132 can be controlled by rotating the sealing members 16.

[0048] In some embodiments, such as Figure 5 and Figure 6As shown in the figure, the fresh air module 100 provided in this application embodiment includes a filter assembly 14, which is disposed inside the housing 11. In the direction of fresh air flow from the third air inlet 131 to the impeller 122, the filter assembly 14 is located between the third air inlet 131 and the air inlet end of the impeller 122. This allows the fresh air to be filtered by the filter assembly 14 before passing through the impeller 122, so as to avoid the fresh air from being mixed with impurities such as dust and lint. Thus, it can not only ensure the quality of the fresh air entering the room, but also prevent dust, lint and other impurities in the fresh air from adhering to the blades of the impeller 122 and affecting the operation of the impeller 122, thereby helping to ensure the normal operation of the impeller 122.

[0049] When the fresh air module 100 is in fresh air mode, the air outlet 1212 and the third air outlet 131 are open, while the second air outlet 112 and the fourth air outlet 132 are closed. Outdoor fresh air enters the room sequentially through the ventilation cavity 13, the third air outlet 131, the filter assembly 14, the air inlet 1211, the impeller 122, the air outlet 1212, and the first air outlet 111. When the fresh air module 100 is in exhaust mode, the air outlet 1212 and the third air outlet 131 are closed, while the second air outlet 112 and the fourth air outlet 132 are open. Indoor air is exhausted to the outside sequentially through the second air outlet 112, the air inlet 1211, the impeller 122, the air outlet 1212, the fourth air outlet 132, and the ventilation cavity 13.

[0050] In some embodiments, such as Figure 7 and Figure 8 As shown, the outer casing 11 has a pull-out opening 113 on the bottom wall along the axial direction of the impeller 122. The pull-out opening 113 is an arc-shaped opening extending circumferentially along the impeller 122. The filter assembly 14 is arc-shaped to match the shape of the pull-out opening 113. The filter assembly 14 is movably and detachably installed inside the outer casing 11 through the pull-out opening 113, and the filter assembly 14 can block the pull-out opening 113, with a portion exposed outside the outer casing 11.

[0051] In the duct air conditioner provided in this application embodiment, a pull-out port 113 is provided on the bottom wall of the outer casing 11, and the filter assembly 14 is movably and detachably disposed inside the outer casing 11 through the pull-out port 113. When the filter assembly 14 is inserted into the outer casing 11 from the pull-out port 113, the filter assembly 14 blocks the pull-out port 113, and part of the filter assembly 14 is located outside the outer casing 11. Thus, when it is necessary to disassemble or assemble the filter assembly 14, the filter assembly 14 can be quickly disassembled or assembled by pulling along the axial direction of the impeller 122 by acting on the part of the filter assembly 14 exposed in the outer casing 11. That is, the operator can perform the disassembly and assembly of the filter assembly 14 outside the fresh air module 100 without removing the inspection cover first. The operation is very simple and convenient, greatly simplifying the disassembly and assembly process of the filter assembly 14, enabling quick replacement of the filter assembly 14, improving the convenience of filter replacement, and saving time and effort.

[0052] The filter assembly 14 is partially exposed outside the outer shell 11. This can be understood as follows: the filter assembly 14 protrudes from the pull-out opening 113 and is located outside the outer shell 11. The part of the filter assembly 14 located outside the outer shell 11 can serve as a grip, making it easy to hold and pull out the filter assembly 14. Alternatively, it can be understood as follows: the filter assembly 14 does not protrude from the pull-out opening 113 and is located outside the outer shell 11. The filter assembly 14 is not blocked by the outer shell 11 through the pull-out opening 113. In this case, the surface of the filter assembly 14 exposed through the pull-out opening 113 can be provided with a groove, so as to hold the groove wall and pull out the filter assembly 14.

[0053] In this application, the filter assembly 14 has a first end 14a and a second end 14b opposite to each other in its circumferential direction, and the filter assembly 14 also has a first side 14c and a second side 14d opposite to each other along the axial direction of the impeller 122. The filter assembly 14 is inserted into the housing 11 from the pull-out port 113 from the first side 14c, and the second side 14d blocks the pull-out port 113. The filter assembly 14 also has a first circumferential side 14e and a second circumferential side 14f opposite to each other in the radial direction. The first circumferential side 14e is generally the windward side of the filter assembly 14, and the second circumferential side 14f is generally the leeward side of the filter assembly 14. When the fresh air module 100 is in fresh air mode, fresh air enters the filter assembly 14 from the first circumferential side 14e and exits from the second circumferential side 14f into the air inlet 1211 of the volute 121.

[0054] In some embodiments, the inner diameter of the filter assembly 14 is smaller than the radius of the air inlet 1211, and the outer diameter of the filter assembly 14 is larger than the radius of the air inlet 1211.

[0055] The applicant discovered through research that airflow would leak out of the impeller 122 from the edge area of ​​the air inlet 1211 of the volute 121, resulting in air leakage and a reduction in the air output of the fresh air module 100.

[0056] Therefore, by making the inner diameter of the filter assembly 14 smaller than the radius of the air inlet 1211 and the outer diameter of the filter assembly 14 larger than the radius of the air inlet 1211, the filter assembly 14 can block the edge area of ​​the air inlet 1211, reducing the amount of air leaking from the edge area of ​​the air inlet 1211 and improving the air leakage situation, thereby increasing the air volume of the fresh air module 100. At the same time, it can also avoid the filter assembly 14 dividing the air inlet 1211 into two parts, with one part of the air inlet located on the windward side of the filter assembly 14 and the other part located on the leeward side of the filter assembly 14. This can prevent fresh air from entering the air impeller 122 directly from the part of the air inlet located on the windward side of the filter assembly 14 without passing through the filter assembly 14, thereby ensuring the quality of the fresh air entering the room.

[0057] The inner diameter of the filter assembly 14 refers to the radius of the arc on the second circumferential side 14f of the filter assembly 14, and the outer diameter of the filter assembly 14 refers to the radius of the arc on the first circumferential side 14e of the filter assembly 14.

[0058] In some embodiments, the filter assembly 14 extends circumferentially along the impeller 122, and the center of the filter assembly 14 coincides with the center of the impeller 122; the housing 11 has opposing first sidewalls 11a and second sidewalls 11b, and a first windbreak 17 and a second windbreak 18 are disposed inside the housing 11. The first windbreak 17 is connected between the first end 14a of the filter assembly 14 and the first sidewall 11a of the housing 11, and the second windbreak 18 is connected between the second end 14b of the filter assembly 14 and the second sidewall 11b of the housing 11.

[0059] In the above structural design, the first wind deflector 17 and the second wind deflector 18 can be used to prevent fresh air from entering the fan 12 directly without passing through the filter assembly 14, thereby improving the quality of fresh air entering the room. At the same time, the size of the filter assembly 14 can be reduced, which can reduce costs and avoid interference between the filter assembly 14 and the third air outlet 131, thus affecting the air volume of the third air outlet 131.

[0060] As an example, the first wind deflector 17 and the second wind deflector 18 may be formed on the bottom wall of the housing 11. In this exemplary embodiment, the first wind deflector 17 and the second wind deflector 18 may be integrally disposed with the housing 11; In another exemplary embodiment, the first wind deflector 17 and the second wind deflector 18 may be formed on the volute 121 and abut against the bottom wall of the outer casing 11. In this exemplary embodiment, the first wind deflector 17 and the second wind deflector may be integrally formed with the volute 121.

[0061] In some embodiments, such as Figure 8 As shown, the second end 14b of the filter assembly 14 is connected to a handle 141, which is located outside the housing 11, so that the operator can pull the filter assembly 14 by holding the handle 141.

[0062] For example, the handle portion 141 may be a columnar structure, a hook structure, a T-shaped structure, etc.

[0063] In some embodiments, there may be multiple handle portions 141, such as two, three, four, five, etc., and the multiple handle portions 141 may be arranged at intervals along the circumferential direction of the filter assembly 14.

[0064] In some embodiments, such as Figure 9 and Figure 10 As shown, a flange 114 protrudes from the bottom wall of the housing 11 along the axial direction of the impeller 122. The flange 114 is located inside the housing 11 and surrounds the periphery of the pull-out opening 113. When assembling or disassembling the filter assembly 14, the peripheral side surfaces of the filter assembly 14 (i.e., the first peripheral side surface 14e and the second peripheral side surface 14f) can be pulled out of the housing 11 or inserted into the housing 11 along the flange 114. In this way, the flange 114 can play a certain guiding role in the assembly and disassembly of the filter assembly 14, avoiding unnecessary deflection, tilting or shaking of the filter assembly 14, facilitating the smooth installation and removal of the filter assembly 14, reducing the difficulty of assembling or disassembling the filter assembly 14, and facilitating the replacement of the filter assembly 14.

[0065] Furthermore, combined Figures 9 to 11 As shown, the second side 14d of the filter assembly 14 is provided with a first buckle 142, which is fastened to the flange portion 114, so that the filter assembly 14 can be fixed to the housing 11 by snap-fit, which facilitates the assembly and disassembly of the filter assembly 14. At the same time, since the first buckle 142 in this application is engaged with the flange portion 114, the flange portion 114 can serve two purposes without the need to set an additional buckle position to engage with the first buckle 142, which helps to simplify the structure of the housing 11 and thus helps to reduce costs.

[0066] In some embodiments, there may be multiple first buckles 142, such as two, three, four, five, etc. Multiple first buckles 142 are arranged at intervals along the circumferential direction of the filter assembly 14, and multiple first buckles 142 are respectively engaged and connected to the flange portion 114.

[0067] Multiple first buckles 142 are provided so that when the filter assembly 14 is assembled inside the housing 11, the filter assembly 14 can be more securely fixed inside the housing 11, which can better prevent the filter assembly 14 from accidentally coming out. This avoids the filter assembly 14 being pulled out by applying a small force, thereby reducing the probability of the filter assembly 14 being accidentally pulled out.

[0068] In some embodiments, combined with Figure 9 , Figure 10 and Figure 12 As shown, a connecting plate 143 extends radially along the impeller 122 from the second side 14d of the filter assembly 14. The connecting plate 143 is provided with a second latch 1431, which includes a plurality of spaced third sub-latches 1431a, such as two third sub-latches 1431a, three third sub-latches 1431a, etc. The bottom wall of the housing 11 is provided with a stepped portion 115, which includes an axial portion 1151 and a radial portion 1152. 1. A portion 1151 is disposed on the bottom wall of the housing 11 and extends along the axial direction of the impeller 122. The axial portion 1151 is located inside the housing 11. A radial portion 1152 is connected to the side of the axial portion 1151 away from the bottom wall and extends radially along the impeller 122. The radial portion 1152 is located inside the housing 11 and is provided with a slot 116. The connecting plate 143 and the radial portion 1152 abut against each other in the axial direction of the impeller 122. A plurality of third sub-snap fasteners 1431a are engaged with the slot 116.

[0069] In the above structure, this application uses the second snap-fit ​​1431 to engage with the slot 116, so that the filter assembly 14 can be fixed to the outer shell 11 by snap-fit, which facilitates the assembly and disassembly of the filter assembly 14. At the same time, since the second snap-fit ​​1431 includes multiple third sub-snap-fits 1431a, multiple snap-fit ​​positions can be formed by using multiple third sub-snap-fits 1431a to engage with the slot 116, thereby improving the connection stability between the second snap-fit ​​1431 and the slot 116. Thus, when the filter assembly 14 is assembled inside the outer shell 11, the filter assembly 14 can be more securely fixed inside the outer shell 11, which can play a better role in preventing the filter assembly 14 from accidentally falling out.

[0070] In some embodiments, the connecting plate 143 may be an arc-shaped plate extending circumferentially along the filter assembly 14, and there may be multiple second snap fasteners 1431, such as two, three, four, five, etc., with multiple second snap fasteners 1431 arranged at intervals along the circumferential direction of the filter assembly 14. Correspondingly, the axial portion 1151 is arc-shaped extending circumferentially along the filter assembly 14, and the radial portion 1152 is arc-shaped extending circumferentially along the filter assembly 14. The number of slots 116 is the same as the number of second snap fasteners 1431, also multiple, such as two, three, four, five, etc., with each second snap fastener 1431 engaging with one slot 116.

[0071] Multiple second latches 1431 and multiple slots 116 are provided so that when the filter assembly 14 is assembled inside the housing 11, the filter assembly 14 can be more securely fixed inside the housing 11, which can better prevent the filter assembly 14 from accidentally falling out. This further avoids the filter assembly 14 being pulled out by applying a small force, thereby greatly reducing the probability of accidentally pulling out the filter assembly 14.

[0072] In some embodiments, the first latch 142 and the second latch 1431 may coexist.

[0073] Specifically, the first snap fastener 142 may include a first sub-snap fastener 142a and a second sub-snap fastener 142b. The first sub-snap fastener 142a is disposed at the first end 14a of the filter assembly 14, and the second sub-snap fastener 142b is disposed at the second end 14b of the filter assembly 14. Moreover, the filter assembly 14 has a connecting plate 143 extending radially along the impeller 122 at the center of its circumferential direction. The connecting plate 143 is provided with a second snap fastener 1431. The second snap fastener 1431 includes a plurality of spaced third sub-snap fasteners 1431a, such as two third sub-snap fasteners 1431a, three third sub-snap fasteners 1431a, etc.

[0074] Meanwhile, the bottom wall of the outer casing 11 is provided with a stepped portion 115, which includes an axial portion 1151 and a radial portion 1152. The axial portion 1151 is provided on the bottom wall of the outer casing 11 and extends along the axial direction of the impeller 122. The axial portion 1151 is located inside the outer casing 11. The radial portion 1152 is connected to the side of the axial portion 1151 away from the bottom wall and extends along the radial direction of the impeller 122. The radial portion 1152 is located inside the outer casing 11 and is provided with a slot 116. The connecting plate 143 and the radial portion 1152 abut against each other in the axial direction of the impeller 122, and multiple third sub-snap fasteners 1431a are engaged with the slot 116.

[0075] In the above structural design, combined with Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, the first buckle 142 and the second buckle 1431 coexist. The first buckle 142 engages with the flange 114, allowing the flange 114 to serve a dual purpose without requiring additional buckle positions, simplifying the structure of the housing 11 and reducing costs. Furthermore, multiple third sub-buckles 1431a engage with the slot 116, forming multiple buckle positions and improving the connection stability between the second buckle 1431 and the slot 116. This ensures that the filter assembly 14 is securely fixed within the housing 11 when assembled, effectively preventing accidental detachment. Thus, this application achieves a balance between simplifying the housing 11 structure and reducing costs while improving the installation stability of the filter assembly 14 within the housing 11 and preventing accidental detachment.

[0076] In some embodiments, such as Figure 15 , Figure 16 and Figure 17 As shown, the filter assembly 14 includes a filter structure 144 and a threaded locking member 145.

[0077] The filter structure 144 is an arc shape that matches the shape of the pull-out port 113. The first side 14c and the second side 14d mentioned above are actually two opposite sides of the filter structure 144 in the axial direction of the impeller 122. The first end 14a and the second end 14b are actually two opposite ends of the filter structure 144 in the circumferential direction. The first circumferential side 14e and the second circumferential side 14f are actually two opposite sides of the filter structure 144 in the radial direction.

[0078] The second side 14d of the filter structure 144 extends radially along the impeller 122 with a connecting plate 143. The connecting plate 143 is provided with a first threaded hole 1432. The bottom wall of the housing 11 is provided with a stepped portion 115, which includes an axial portion 1151 and a radial portion 1152. The axial portion 1151 is located on the bottom wall of the housing 11 and extends axially along the impeller 122. The axial portion 1151 is located inside the housing 11. The radial portion 1152 is connected to the side of the axial portion 1151 away from the bottom wall and extends radially along the impeller 122. The radial portion 1152 is located inside the housing 11 and is provided with a second threaded hole 117. The threaded locking member 145 passes through the first threaded hole 1432 and the second threaded hole 117, and is threadedly connected to the first threaded hole 1432 and the second threaded hole 117. Part of the threaded locking member 145 is located outside the housing 11, so that the operator can pull the filter assembly 14 by holding the threaded locking member 145.

[0079] In the above structural design, the filter assembly 14 and the housing 11 are connected by threaded engagement between the threaded locking member 145 and the first threaded hole 1432 and the second threaded hole 117. When installing the filter assembly 14 into the housing 11, the threaded locking member 145 can be manually screwed into the first threaded hole 1432 and the second threaded hole 117, and then the threaded locking member 145 can be tightened to fix the filter assembly 14 inside the housing 11. The fixing method is relatively simple and easy to operate. When it is necessary to replace the filter assembly 14, only... When the threaded locking part 145 is unscrewed from the second threaded hole 117, the threaded locking part 145 is no longer threadedly connected to the second threaded hole 117. Instead, the threaded locking part 145 is still threadedly connected to the first threaded hole 1432. This allows the filter assembly 14 to be pulled out by hand by pulling the threaded locking part 145, making the threaded locking part 145 a dual-purpose device. There is no need to set up an additional handle part 141 for gripping, which simplifies the structure of the filter assembly 14 and helps to reduce costs.

[0080] Optionally, the threaded locking element 145 may be a bolt or screw or other component.

[0081] In some embodiments, the threaded locking member 145 has a first rib 1451 and a second rib 1452 protruding from the end face opposite to the housing 11. In the direction away from the housing 11, that is, in the pulling direction of pulling out the filter assembly 14, the first rib 1451 is inclined away from the connection point with the threaded locking member 145 towards the direction away from the second rib 1452, and the second rib 1452 is inclined away from the connection point with the threaded locking member 145 towards the direction away from the first rib 1451. In this way, when the bottom wall of the housing 11 is facing up and the top wall of the housing 11 is facing down, the first rib 1451 and the second rib 1452 are arranged in an inverted V-shape, which is convenient for manual rotation operation.

[0082] In some embodiments, the filter structure 144 may include a filter frame 1441 and a filter screen 1442. The filter screen 1442 is fixedly disposed within the filter frame 1441. By disposing the filter screen 1442 within the filter frame 1441, the rigidity of the filter frame 1441 can be used to support the filter screen 1442, thereby preventing deformation of the filter screen 1442.

[0083] In some embodiments, such as Figure 16 and Figure 18As shown, a first protrusion 1213 is provided at the edge of the air inlet 1211 of the volute 121 along the axial direction of the impeller 122, and the first protrusion 1213 is located outside the volute 121; a second protrusion 146 is provided on the side of the filter assembly 14 near the fan 12 along the axial direction of the impeller 122, that is, the first side 14c of the filter assembly 14 is provided with the second protrusion 146, and the second protrusion 146 and the first protrusion 1213 are arranged radially along the impeller 122.

[0084] Compared to the direct surface-to-surface contact of the filter assembly 14 and the volute 121 in the axial direction of the impeller 122, this configuration, by using the first protrusion 1213 and the second protrusion 146 to be staggered in the axial direction of the impeller 122, can better and more effectively prevent fresh air from entering the fan 12 directly without passing through the filter assembly 14, thereby improving the quality of fresh air entering the room.

[0085] In one example, the first protrusion 1213 is closer to the center of the wind turbine 122 in the radial direction than the second protrusion 146; in another example, the second protrusion 146 is closer to the center of the wind turbine 122 in the radial direction than the first protrusion 1213.

[0086] In some embodiments, such as Figure 19 , Figure 20 and Figure 21 As shown, the filter assembly 14 is provided with first guide members 147 at both ends in the circumferential direction. The housing 11 is provided with second guide members 118 corresponding to the two first guide members 147. One of the first guide members 147 and the second guide member 118 is a guide protrusion, and the other of the first guide member 147 and the second guide member 118 is a guide groove. The guide protrusion and the guide groove are matched and can slide relative to the guide groove along the axial direction of the impeller 122.

[0087] Through the cooperation of the first guide 147 and the second guide 118, the movement of the filter assembly 14 can be guided when the filter assembly 14 is inserted or pulled out, so as to avoid unnecessary deflection, tilting or shaking of the filter assembly 14, making it easier to install and remove the filter assembly 14, reducing the difficulty of installing and removing the filter assembly 14, and making it easier to replace the filter assembly 14.

[0088] The first guide member 147 may be a part of the filter frame 1441; the second guide member 118 may be integrally set with the outer shell 11 or integrally set with the volute 121.

[0089] For example, two second guide members 118 may be formed on the first windshield member 17 and the second windshield member 18, respectively.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] Furthermore, the embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the content of this specification should not be construed as a limitation of this application, and the protection scope of this application should be determined by the appended claims.

Claims

1. A ducted air conditioner, characterized in that, The ducted air handling unit includes a fresh air module, which includes: The outer casing has a first air vent and an openable and closable second air vent. The fan includes: A volute, disposed within the outer shell, the volute having an air inlet and an air outlet, at least one of the air outlet and the first air outlet being openable and closable; The wind turbine is disposed inside the volute. A ventilation cavity is formed within the volute, and the ventilation cavity has an openable and closable third air vent and a fourth air vent; A filter assembly is disposed inside the housing, and in the direction of fresh air flow from the third air inlet to the impeller, the filter assembly is located between the third air inlet and the air inlet of the impeller. When the fresh air module is in fresh air mode, the first air vent and / or the air outlet are in the open state, the third air vent is in the open state, and the second air vent and the fourth air vent are in the closed state. Outdoor fresh air enters the room sequentially through the ventilation cavity, the third air vent, the filter assembly, the air inlet, the impeller, the air outlet and the first air vent. When the fresh air module is in exhaust mode, the first air vent and / or the air outlet is closed, the third air vent is closed, and the second air vent and the fourth air vent are open. The indoor air is discharged to the outside through the second air vent, the air inlet, the impeller, the air outlet, the fourth air vent and the ventilation cavity in sequence. The outer casing has a pull-out opening on the bottom wall along the axial direction of the wind turbine, and the pull-out opening is an arc-shaped opening extending along the circumference of the wind turbine. The filter assembly is arc-shaped to match the shape of the pull-out opening. The filter assembly is movably and detachably installed inside the housing through the pull-out opening, and the filter assembly can block the pull-out opening, with a portion exposed outside the housing.

2. The duct air conditioner according to claim 1, characterized in that, The inner diameter of the filter assembly is smaller than the radius of the air inlet, and the outer diameter of the filter assembly is larger than the radius of the air inlet.

3. The duct air conditioner according to claim 1, characterized in that, The filter assembly extends circumferentially along the impeller, and the center of the arc of the filter assembly coincides with the center of the impeller. The filter assembly has a first end and a second end opposite each other in its circumferential direction, the housing has a first sidewall and a second sidewall opposite each other, and the interior of the housing is provided with: A first windshield is connected between the first end and the first sidewall; The second windshield is connected between the second end and the second sidewall.

4. The duct air conditioner according to claim 1, characterized in that, The bottom wall of the outer casing is provided with a flange portion along the axial direction of the impeller. The flange portion is located inside the outer casing and is arranged around the periphery of the pull-out opening. The filter assembly has a first side and a second side opposite to each other along the axial direction of the impeller. The filter assembly is inserted into the housing from the pull-out port from the first side. The second side blocks the pull-out port. The second side is provided with a first buckle. The first buckle is engaged with the flange. The second side is connected to a handle, which is located outside the outer casing.

5. The duct air conditioner according to claim 4, characterized in that, There are multiple first buckles, which are arranged at intervals along the circumference of the filter assembly, and each of the multiple first buckles is engaged with the flange portion.

6. The duct air conditioner according to claim 4, characterized in that, The filter assembly has a first end and a second end opposite each other in its circumferential direction, and the first snap includes: A first sub-clamp, the first sub-clamp being disposed at the first end of the filter assembly; and, The second sub-clamp is disposed at the second end of the filter assembly; The filter assembly has a connecting plate extending radially along the impeller at the center of its circumferential direction. The connecting plate is provided with a second buckle, which includes a plurality of spaced third sub-buckles. The bottom wall of the outer casing is provided with a stepped portion, the stepped portion comprising: An axial portion, wherein the axial portion is disposed on the bottom wall of the housing and extends axially along the impeller, the axial portion being located within the housing; and, The radial portion is connected to the axial portion on the side away from the bottom wall and extends radially along the impeller. The radial portion is located inside the housing and is provided with a slot. The connecting plate and the radial portion abut against each other in the axial direction of the wind turbine, and the plurality of the third sub-buckles are engaged with the slot.

7. The duct air conditioner according to claim 1, characterized in that, The filter assembly has a first side and a second side opposite to each other along the axial direction of the impeller. The filter assembly is inserted into the housing from the pull-out port from the first side. The second side blocks the pull-out port. The second side is connected to a handle located outside the housing. The second side extends radially along the wind turbine with a connecting plate, and the connecting plate is provided with a second buckle, the second buckle including a plurality of spaced third sub-buckles; The bottom wall of the outer casing is provided with a stepped portion, the stepped portion comprising: An axial portion, wherein the axial portion is disposed on the bottom wall of the housing and extends axially along the impeller, the axial portion being located within the housing; and, The radial portion is connected to the axial portion on the side away from the bottom wall and extends radially along the impeller. The radial portion is located inside the housing and is provided with a slot. The connecting plate and the radial portion abut against each other in the axial direction of the wind turbine, and the plurality of the third sub-buckles are engaged with the slot.

8. The duct air conditioner according to claim 1, characterized in that, The filter assembly includes a filter structure having a first side and a second side opposite to each other along the axial direction of the impeller. The filter structure is inserted into the housing from the pull-out port from the first side. The second side blocks the pull-out port. A connecting plate extends radially from the second side along the impeller. The connecting plate is provided with a first threaded hole. The bottom wall of the outer casing is provided with a stepped portion, the stepped portion comprising: An axial portion, wherein the axial portion is disposed on the bottom wall of the housing and extends axially along the impeller, the axial portion being located within the housing; and, A radial portion, which is connected to the axial portion on the side away from the bottom wall and extends radially along the impeller, is located inside the housing and is provided with a second threaded hole; The filter assembly also includes a threaded locking member, which passes through the first threaded hole and the second threaded hole and is threadedly connected to the first threaded hole and the second threaded hole. A portion of the threaded locking member is located outside the housing.

9. The duct air conditioner according to claim 1, characterized in that, The edge of the air inlet is provided with a first protrusion along the axial direction of the impeller, and the first protrusion is located outside the volute. The filter assembly has a second protrusion on the side near the fan along the axial direction of the impeller, and the second protrusion and the first protrusion are arranged radially along the impeller.

10. The duct air conditioner according to claim 1, characterized in that, The filter assembly is provided with a first guide at each end of its circumferential direction. The housing is provided with a second guide that corresponds one-to-one with the two first guides. One of the first guides and the second guide is a guide protrusion, and the other of the first guide and the second guide is a guide groove. The guide protrusion and the guide groove are configured to cooperate with each other and can slide relative to the guide groove along the axial direction of the impeller.

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