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 side wall of the shell in the radial direction of the fan wheel is provided with a pull-out opening, the pull-out opening and a fifth air outlet are located on the same side of the shell; the filter screen assembly is in a straight plate structure, 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 outside 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 indoor unit 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] To improve the quality of fresh air, fresh air modules typically include a filter assembly for filtering fresh air. The filter assembly includes a filter screen for filtering and purifying the fresh air. Due to the characteristics of the filter screen, there is a limit to the total amount of dust, lint, and other impurities that it can adsorb. Therefore, users need to replace the filter screen regularly to maintain its normal filtering function.

[0004] To achieve a replaceable filter design, most fresh air modules in related technologies use screws and sheet metal parts to install the filter inside the module, allowing it to be removed and replaced after a period of use. However, installing or removing the filter requires a considerable amount of time to handle the screws and sheet metal parts, making the process time-consuming and inconvenient. Furthermore, since fresh air modules, like ducted air conditioners, are ceiling-mounted, removing the filter requires climbing to a height. Given that the filter is a frequently replaced component, this inconvenience can easily lead to user dissatisfaction. Utility Model Content

[0005] This application discloses a ducted air conditioner that can solve the problem of inconvenient disassembly and replacement of the filter of the fresh air module in the prior art.

[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 inside the volute. The cavity wall of the ventilation cavity has an openable and closable third air vent and a fourth air vent, and the ventilation cavity is connected to the outside through a fifth air vent. A filter assembly is disposed within the housing, and in the direction of fresh air flow from the third air inlet to the air inlet, the filter assembly is located between the third air inlet and the air inlet; When the fresh air module is in fresh air mode, the first air vent and / or the air outlet are in the open state, and the third air vent is in the open state, while the second air vent and the fourth air vent are in the closed state. Outdoor fresh air enters the room sequentially through the fifth air vent, 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 are closed, and the third air vent is closed, while 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, the ventilation cavity, and the fifth air vent in sequence. The outer casing has a pull-out opening on the radial side wall of the wind turbine, and the pull-out opening and the second air outlet are located on the same side of the outer casing. The filter assembly has a straight plate structure. The filter assembly is movably and detachably installed inside the housing through the pull-out opening. The filter assembly can block the pull-out opening and has 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 side 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 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. At the same time, compared with the method of fixing the filter assembly with screws and sheet metal parts, there is no need to disassemble or install screws and sheet metal parts. 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.

[0008] In addition, placing the pull-out port and the fifth air outlet on the same side of the casing can prevent the filter assembly from interfering with other components (such as the body of the ducted air conditioner, the wall, etc.) during the pull-out process when the fresh air module is installed on the indoor ceiling, thus facilitating the pull-out operation of the filter assembly. Attached Figure Description

[0009] 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.

[0010] 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 3 This 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 the embodiments of this application 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 the embodiments of this application is along Figure 3 A three-dimensional sectional view along the BB direction; Figure 7 yes Figure 6 Exploded view; Figure 8 yes Figure 6 A magnified view of point M in the image; 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 simplified structural diagram; Figure 12 yes Figure 10 A magnified view of point N in the image; Figure 13 This is a schematic diagram of the internal structure of the fresh air module disclosed in the embodiments of this application; Figure 14 yes Figure 13 Exploded view; Figure 15 This is a schematic diagram of the structure of the filter assembly disclosed in the embodiments of this application; Figure 16 This is an exploded structural diagram of the filter assembly disclosed in the embodiments of this application.

[0011] Explanation of main figure symbols 100 - Fresh air module; 11 - Outer casing; 111 - First air vent; 112 - Second air vent; 113 - Pull-out opening; 114 - First anti-detachment structure; 114a - Slot; 12 - Fan; 121 - Volute; 1211 - Air inlet; 1212 - Air outlet; 1213 - Baffle plate; 1214 - First guide rail; 1214a - First guide rib; 122 - Impeller; 13 - Ventilation cavity; 131 - Third air vent; 132 - Fourth air vent; 133 - Fifth air vent; 14 - Filter Components; 14a-First end; 14b-Second end; 14c-First side; 14d-Second side; 14e-Windward side; 14f-Leaning side; 141-Filter frame; 1411-Mounting port; 1412-Anti-detachment protrusion; 142-Filter screen; 143-Protruding post; 144-Limiting rib; 145-Second anti-detachment structure; 145a-Hook; 15-Duct connector; 16-Sealing component; 17-First windbreak component; 18-Second windbreak component; 19-First elastic layer. Detailed Implementation

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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 air vent may be referred to as a second air vent, and similarly, a second air vent may be referred to as a first air vent. Both the first air vent and the second air vent are air vents, but they are not the same air vent.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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).

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please see Figure 1 and Figure 2 The fresh air module 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.

[0036] The outer casing 11 has a first air vent 111.

[0037] like Figure 3 and Figure 4As shown, in some embodiments, the fresh air module 100 provided in this application includes a fan 12 and a ventilation cavity 13.

[0038] 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.

[0039] In this application, a ventilation cavity 13 is formed within the volute 121 and communicates with the outside. For example, the ventilation cavity 13 can communicate with the outside through a fifth air vent 133, and the ventilation cavity 13 has a third air vent 131 that communicates with the air inlet 1211. Thus, when the impeller 122 is running, fresh air from the outside can enter the room sequentially through the fifth air vent 133, 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 to keep the indoor air fresh.

[0040] 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.

[0041] 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 fifth air vent 133, 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, the ventilation cavity 13, and the fifth air vent 133.

[0042] When only the air outlet 1212 can be opened and closed among the first air outlet 111 and the air outlet 1212, in the fresh air module 100 in fresh air mode, the air outlet 1212 and the third air outlet 131 are open, and the second air outlet 112 and the fourth air outlet 132 are closed. The fresh air from outside enters the room sequentially through the fifth air outlet 133, 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. In the exhaust mode, the air outlet 1212 and the third air outlet 131 are closed, and the second air outlet 112 and the fourth air outlet 132 are open. 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, the ventilation cavity 13, and the fifth air outlet 133.

[0043] 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 open, while the second air vent 112 and the fourth air vent 132 are closed. Outdoor fresh air enters the room sequentially through the fifth air vent 133, 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 closed, while 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, the ventilation cavity 13, and the fifth air vent 133.

[0044] 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 fifth air vent 133, 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 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, the ventilation cavity 13, and the fifth air outlet 133, thereby improving indoor air quality, effectively reducing the concentration of harmful gases indoors, and enhancing user comfort.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 flow direction of fresh air from the third air outlet 131 to the air inlet 1211, the filter assembly 14 is located between the third air outlet 131 and the air inlet 1211. 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 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.

[0050] 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 fifth air outlet 133, 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, the ventilation cavity 13, and the fifth air outlet 133.

[0051] In some embodiments, such as Figure 6 and Figure 7 As shown, the outer casing 11 has a pull-out opening 113 on the radial side wall of the impeller 122, and the pull-out opening 113 and the fifth air outlet 133 are located on the same side of the outer casing 11.

[0052] In some embodiments, the filter assembly 14 may be a straight plate structure. The filter assembly 14 is movably and detachably disposed inside the housing 11 through the pull-out port 113, and the filter assembly 14 can block the pull-out port 113 and has a portion exposed outside the housing 11.

[0053] By providing a pull-out opening 113 on the bottom wall of the outer casing 11, and allowing the filter assembly 14 to be movably and detachably installed inside the outer casing 11 through the pull-out opening 113, when the filter assembly 14 is inserted into the outer casing 11 through the pull-out opening 113, the filter assembly 14 blocks the pull-out opening 113, and a portion of the filter assembly 14 is located outside the outer casing 11. Thus, when it is necessary to disassemble or install the filter assembly 14, the portion of the filter assembly 14 exposed outside the outer casing 11 can be pulled out to complete the quick disassembly and installation of the filter assembly 14. In other words, the operator can perform the disassembly and installation of the filter assembly 14 outside the fresh air module 100 without first removing the inspection cover. The operation is very simple and convenient, greatly simplifying the disassembly and installation 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.

[0054] In addition, by placing the pull-out port 113 and the fifth air outlet 133 on the same side of the housing 11, the filter assembly 14 can be prevented from interfering with other components (such as the body of the air duct unit, the wall, etc.) during the pull-out process when the fresh air module 100 is installed on the indoor ceiling, thus facilitating the pull-out operation of the filter assembly 14.

[0055] 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.

[0056] In some embodiments, such as Figure 7 As shown, the filter assembly 14 has a first end 14a and a second end 14b opposite each other in its length direction. The filter assembly 14 can be inserted into the housing 11 from the pull-out port 113 from the first end 14a. The second end 14b is blocked in the pull-out port 113. The filter assembly 14 also has a first side 14c and a second side 14d opposite each other. The first side 14c is disposed toward the bottom wall of the housing 11, and the second side 14d is disposed toward the volute 121. That is, in the axial direction of the impeller 122, the first side 14c is closer to the fan 12 than the second side 14d.

[0057] In some embodiments, a portion of the second side 14d of the filter assembly 14 is located outside the housing 11, specifically a portion of the second side 14d of the filter frame 141 is located outside the housing 11, so that an operator can pull the filter assembly 14 by holding the second side 14d.

[0058] In some embodiments, such as Figure 6 and Figure 7 As shown, the housing 11 is provided with a first wind deflector 17 and a second wind deflector 18. The first wind deflector 17 abuts against the first end 14a at least in the length direction of the filter assembly 14. In this way, the first wind deflector 17 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, thereby reducing the cost of the filter assembly 14.

[0059] As an example, the first wind deflector 17 may be formed on the bottom wall of the housing 11. In this exemplary embodiment, the first wind deflector 17 may be integrally disposed with the housing 11.

[0060] In another exemplary embodiment, the first wind deflector 17 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 may be integrally formed with the volute 121.

[0061] In some embodiments, combined with Figures 6 to 8 As shown, a second wind baffle 18 is provided inside the outer casing 11. In the direction of fresh air flow from the third air outlet 131 to the impeller 122, the second wind baffle 18 is located between the third air outlet 131 and the filter assembly 14. The second wind baffle 18 abuts against the peripheral side of the second end 14b and blocks the gap between the pull-out port 113 and the second end 14b in the opening direction of the pull-out port 113, so as to prevent fresh air from leaking out from the pull-out port 113, which would reduce the amount of fresh air entering the fan 12. This can improve the situation of air leakage in the fresh air module 100 caused by the pull-out port 113 for the replacement of the filter assembly 14, and ensure the fresh air output of the fresh air module 100.

[0062] As an example, the second wind deflector 18 may be formed on the bottom wall of the housing 11. In this exemplary embodiment, the second wind deflector 18 may be integrally formed with the housing 11; In another exemplary embodiment, 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 second wind deflector 18 may be integrally formed with the volute 121.

[0063] In some embodiments, such as Figure 7 As shown, the filter assembly 14 and the volute 121 intersect, forming two intersection points. The distance between the two intersection points is less than the diameter of the impeller 122. Specifically, the filter assembly 14 has opposing windward and leeward surfaces 14e and 14f. The leeward surface 14f intersects with the top edge of the volute 121 and the air inlet 1211, forming two intersection points. The distance between the two intersection points is less than the diameter of the impeller 122.

[0064] 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.

[0065] Therefore, by making the top edge of the leeward side 14f of the filter assembly 14 intersect with the air inlet 1211 of the volute 121, and making the distance between the two intersection points smaller than the diameter of the impeller 122, the edge area of ​​the air inlet 1211 can be blocked, for example, by the filter assembly 14, or by having a baffle plate 1213 extending from the edge of the air inlet 1211 toward the axis of the impeller 122 to block the edge area of ​​the air inlet 1211. In this case, the filter assembly 14 is in contact with the baffle plate 1213, thereby reducing the amount of air leaking from the edge area of ​​the air inlet 1211 of the impeller 122, improving the air leakage situation, and thus increasing the air output of the fresh air module 100.

[0066] For ease of description, such as Figures 9 to 11 As shown, this application defines the angle between the axes of the filter assembly 14 and the impeller 122 as α, that is, the angle between the windward or leeward side of the filter assembly 14 and the axis of the impeller 122 is defined as α. It is understood that the above definition is merely for ease of description and should not be used to limit the scope of protection of this application.

[0067] In some embodiments, 0 ≤ α ≤ 15°, for example, 0 ≤ α ≤ 3°, 3 ≤ α ≤ 5°, 5 ≤ α ≤ 8°, 8 ≤ α ≤ 10°, 10 ≤ α ≤ 12°, or 12 ≤ α ≤ 15°, etc. Exemplarily, α = 0, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, or 15°, etc.

[0068] Understandably, when α=0, the axes of the filter assembly 14 and the impeller 122 are arranged parallel; while when α>0, the filter assembly 14 is inclined relative to the axis of the impeller 122. In the axial direction of the impeller 122, the filter assembly 14 can be inclined from the connection point with its volute 121 towards the axial direction of the impeller 122, or it can be inclined from the connection point with its volute 121 away from the axis of the impeller 122.

[0069] If α > 15°, the filter assembly 14 will occupy a large space, affecting the installation space of other parts inside the housing 11. The filter assembly 14 may interfere with the third air vent 131, blocking the third air vent 131 and affecting the air volume of the third air vent 131. Alternatively, the filter assembly 14 may be too close to the axis (center) of the impeller 122, causing the air inlet 1211 of the volute 121 to be blocked too much, affecting the air volume of the air inlet 1211.

[0070] Therefore, when 0≤α≤15°, on the one hand, the third air vent 131 and the air inlet 1211 can be excessively blocked, thereby ensuring the ventilation rate of the third air vent 131 and the air inlet 1211 and avoiding the ventilation rate of the third air vent 131 and the air inlet 1211 being too low, so that the fresh air module 100 has a large air volume, thereby enabling the fresh air module 100 to effectively and timely improve the indoor air; on the other hand, when the filter assembly 14 and the axis of the impeller 122 are not parallel, that is, when the filter assembly 14 is tilted relative to the axis of the impeller 122, the filtration area of ​​the filter assembly 14 can be increased and the filtration efficiency of the filter assembly 14 can be improved.

[0071] Along the axial direction of the impeller 122, the filter assembly 14 is inclined from its connection with the volute 121 towards the axis of the impeller 122. This arrangement increases the filtration area of ​​the filter assembly 14, improving filtration efficiency, while allowing the leeward side of the filter assembly 14 to be slightly facing the air inlet 1211 of the volute 121, facilitating the flow of fresh air after passing through the filter assembly 14 towards the air inlet 1211 of the volute 121.

[0072] In some embodiments, a first elastic layer 19 is provided on the bottom wall of the outer casing 11 facing the filter assembly 14, and the first elastic layer 19 abuts against the first side portion 14c. This allows the filter assembly 14 to be interference-fitted between the volute 121 and the bottom wall of the outer casing 11, preventing fresh air from bypassing the filter assembly 14 and directly entering the impeller 122 from the connection between the filter assembly 14 and the volute 121, and the connection between the filter assembly 14 and the bottom wall of the outer casing 11. This ensures that all outdoor fresh air is purified by the filter assembly 14 before entering the impeller 122, thereby helping to ensure the quality of fresh air entering the room and preventing 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, thus helping to ensure the normal operation of the impeller 122.

[0073] Furthermore, even if the filter assembly 14 has been pulled and replaced multiple times, causing wear on the volute 121 and increasing the distance between the volute 121 and the bottom wall of the outer shell 11, the first elastic layer 19 can restore the deformation and compensate for the increased distance between the volute 121 and the bottom wall of the outer shell 11. This allows the filter assembly 14 to still be interference-fitted between the volute 121 and the bottom wall of the outer shell 11, preventing fresh air from entering the impeller 122 directly from the connection between the filter assembly 14 and the volute 121, and the connection between the filter assembly 14 and the bottom wall of the outer shell 11 without passing through the filter assembly 14. This ensures that all outdoor fresh air can be purified by the filter assembly 14 before entering the impeller 122, thereby helping to ensure the quality of the fresh air entering the room and preventing dust, lint, and other impurities in the fresh air from adhering to the blades of the impeller 122 and affecting its operation, thus helping to ensure the normal operation of the impeller 122.

[0074] Optionally, the first elastic layer 19 may be, but is not limited to, a sponge layer, a silicone layer, a plastic layer, a rubber layer, or a foam layer, etc.

[0075] In other embodiments, a second elastic layer (not shown) is provided on the surface of the volute 121 facing the filter assembly 14, and the second elastic layer abuts against the second side portion 14d. This allows the filter assembly 14 to be interference-fitted between the volute 121 and the bottom wall of the outer casing 11, preventing fresh air from bypassing the filter assembly 14 and directly entering the impeller 122 from the connection between the filter assembly 14 and the volute 121, and the connection between the filter assembly 14 and the bottom wall of the outer casing 11. This ensures that all outdoor fresh air is purified by the filter assembly 14 before entering the impeller 122, thereby helping to ensure the quality of fresh air entering the room and preventing dust, lint, and other impurities in the fresh air from adhering to the blades of the impeller 122 and affecting its operation, thus helping to ensure the normal operation of the impeller 122.

[0076] Furthermore, even if the filter assembly 14 has been pulled and replaced multiple times, causing wear on the bottom wall of the outer casing 11 and increasing the distance between the volute 121 and the bottom wall of the outer casing 11, the deformation can be restored by the second elastic layer to compensate for the increased distance between the volute 121 and the bottom wall of the outer casing 11. This allows the filter assembly 14 to still be interference-fitted between the volute 121 and the bottom wall of the outer casing 11, preventing fresh air from entering the impeller 122 directly from the connection between the filter assembly 14 and the volute 121, and the connection between the filter assembly 14 and the bottom wall of the outer casing 11 without passing through the filter assembly 14. This ensures that all outdoor fresh air can be purified by the filter assembly 14 before entering the impeller 122, thereby helping to ensure the quality of the fresh air entering the room and preventing dust, lint, and other impurities in the fresh air from adhering to the blades of the impeller 122 and affecting its operation, thus helping to ensure the normal operation of the impeller 122.

[0077] Optionally, the second elastic layer may be, but is not limited to, a sponge layer, a silicone layer, a plastic layer, a rubber layer, or a foam layer, etc.

[0078] It is understood that in other embodiments, the first elastic layer 19 and the second elastic layer may coexist.

[0079] In some embodiments, such as Figure 10 and Figure 12 As shown, the volute 121 is provided with a first guide rail 1214. The shape of the first guide rail 1214 is adapted to the shape of the filter assembly 14, and the first side 14c of the filter assembly 14 cooperates with the first guide rail 1214 and can slide relative to the first guide rail 1214. By providing the first guide rail 1214, the movement of the filter assembly 14 can be guided when inserting or pulling out 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 disassembling and installing the filter assembly 14, and facilitating the replacement of the filter assembly 14.

[0080] In addition, since the first side 14c of the filter assembly 14 and the first guide rail 1214 are directly used together, and no additional guide rail structure is set on the filter assembly 14, the structure of the filter assembly 14 is relatively simple and the cost is low.

[0081] In other embodiments, the housing 11 has a second guide rail (not shown) on its bottom wall along the axial direction of the impeller 122. The shape of the second guide rail is adapted to the shape of the filter assembly 14, and the second side 14d of the filter assembly 14 engages with the second guide rail and can slide relative to the second guide rail. The second guide rail guides the movement of the filter assembly 14 when it is inserted or pulled out, preventing unnecessary deflection, tilting, or shaking. This facilitates easy installation and removal of the filter assembly 14, reduces the difficulty of installation and removal, and makes it easier to replace the filter assembly 14.

[0082] In addition, since the second side 14d of the filter assembly 14 is directly used in conjunction with the second guide rail, and no additional guide rail structure is set on the filter assembly 14, the structure of the filter assembly 14 is relatively simple and the cost is low.

[0083] In other embodiments, the first guide rail 1214 and the second guide rail may coexist.

[0084] In some embodiments, such as Figure 13As shown, the first guide rail 1214 may include two first guide ribs 1214a arranged radially at intervals along the filter assembly 14. The first guide ribs 1214a are straight ribs whose shape is adapted to the shape of the filter assembly 14. The first side portion 14c of the filter assembly 14 is slidably embedded between the two first guide ribs 1214a.

[0085] Understandably, in other embodiments, the first guide rail 1214 may also be a guide groove formed on the volute 121, the shape of which is adapted to the shape of the filter assembly 14, and the first side portion 14c of the filter assembly 14 is slidably embedded in the guide groove.

[0086] In some embodiments, the second guide rail may include two second guide ribs (not shown) arranged radially spaced along the filter assembly 14. The second guide ribs are straight ribs whose shape is adapted to the shape of the filter assembly 14, and the second side portion 14d of the filter assembly 14 is slidably embedded between the two second guide ribs.

[0087] Understandably, in other embodiments, the second guide rail may also be a guide groove formed on the bottom wall of the housing 11, the shape of which is adapted to the shape of the filter assembly 14, and the second side 14d of the filter assembly 14 is slidably embedded in the guide groove.

[0088] In this application, as Figure 12 , Figure 13 and Figure 14 As shown, for ease of description, the height of the first guide rail 1214 protruding relative to the volute 121 is defined as h1, that is, the height of the first guide rib 1214a protruding relative to the volute 121 is defined as h1. It is understood that the above definition is merely for ease of description and should not be used to limit the scope of protection of this application.

[0089] In some embodiments, the height h1 of the first guide rail 1214 protruding relative to the volute 121 can be 5mm-10mm, for example, 5mm≤h1≤6mm, 6mm≤h1≤7mm, 7mm≤h1≤8mm, 8mm≤h1≤9mm, or 9mm≤h1≤10mm, etc. Exemplarily, h1 = 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, or 10mm, etc.

[0090] If h1 < 5mm, the height of the first guide rail 1214 is too low, which will result in poor guiding effect or even fail to play a guiding role.

[0091] If h1 > 10mm, the first guide rail 1214 will excessively block the filter assembly 14, reducing the effective filtration area of ​​the filter assembly 14 and thus affecting the filtration efficiency of the filter assembly 14.

[0092] Therefore, when 5mm≤h1≤10mm, the guiding effect of the first guide rail 1214 can be ensured, and the obstruction of the first guide rail 1214 to the fresh air can be reduced, so as to ensure the effective filtration area of ​​the filter assembly 14 and thus ensure the filtration efficiency of the filter assembly 14.

[0093] Similarly, the height of the second guide rail protruding relative to the bottom wall of the outer casing 11 can be 5mm-10mm. For example, the height of the second guide rail protruding relative to the bottom wall of the outer casing 11 can be 5mm-6mm, 6mm-7mm, 7mm-8mm, 8mm-9mm, or 9mm-10mm, etc. For example, the height of the second guide rail protruding relative to the bottom wall of the outer casing 11 can be 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, or 10mm, etc.

[0094] If the height of the second guide rail protruding from the bottom wall of the outer casing 11 is less than 5mm, the height of the second guide rail is too low, which will result in poor guiding effect or even failure to play a guiding role.

[0095] If the height of the second guide rail protruding from the bottom wall of the outer casing 11 is greater than 10mm, the second guide rail will excessively block the filter assembly 14, which will reduce the effective filtration area of ​​the filter assembly 14 and thus affect the filtration efficiency of the filter assembly 14.

[0096] Therefore, when the height of the second guide rail protruding relative to the bottom wall of the outer casing 11 is controlled within the range of 5mm-10mm, the guiding effect of the second guide rail can be ensured, and the obstruction of the second guide rail to the fresh air can be reduced, so as to ensure the effective filtration area of ​​the filter assembly 14 and thus ensure the filtration efficiency of the filter assembly 14.

[0097] In some embodiments, combined with Figures 13 to 15 As shown, the outer casing 11 is provided with a first anti-detachment structure 114, and the second end 14b of the filter assembly 14 is provided with a second anti-detachment structure 145. The first anti-detachment structure 114 and the second anti-detachment structure 145 cooperate to prevent the filter assembly 14 from detaching from the outer casing 11.

[0098] Because the filter assembly 14 has a straight plate structure, it is relatively easy to move relative to the volute 121 and the outer shell 11, and it is relatively easy to detach from the outer shell 11. By setting the first anti-detachment structure 114 and the second anti-detachment structure 145, the cooperation of the two can achieve a better effect in preventing the filter assembly 14 from accidentally detaching, so that the filter assembly 14 can be more firmly fixed in the outer shell 11, avoiding the filter assembly 14 being pulled out by applying a small force. For example, it can prevent the filter assembly 14 from accidentally detaching during transportation or other situations, thereby reducing the probability of accidentally pulling out the filter assembly 14.

[0099] In some embodiments, the first anti-detachment structure 114 may include a slot 114a formed on the side wall of the housing 11. The slot 114a and the pull-out opening 113 are located on the same side wall of the housing 11. The second anti-detachment structure 145 may include a hook 145a that engages with the slot 114a. This configuration allows the anti-detachment design of the filter assembly 14 to be achieved through the engaging action of the hook 145a and the slot 114a. This simplifies and makes the anti-detachment method of the filter assembly 14 easier to implement without compromising its convenient and detachable design.

[0100] In other embodiments, the first anti-detachment structure 114 may include a first magnetic component, and the second anti-detachment structure 145 may include a second magnetic component. The second magnetic component and the first magnetic component are magnetically connected to each other to prevent the filter assembly 14 from detaching from the housing 11.

[0101] In some embodiments, such as Figure 14 , Figure 15 and Figure 16 As shown, the second end 14b of the filter assembly 14 has two opposing protruding posts 143. The cross-sectional shape of the protruding post 143 is semi-circular. For example, the cross-sectional shape of the protruding post 143 cut by a plane perpendicular to the axis of the impeller 122 is semi-circular. The semi-circular cross-sectional shape of the protruding post 143 makes it easier for the user to apply outward force when pulling out the filter assembly 14.

[0102] In some embodiments, the portion of the filter assembly 14 located outside the housing 11 is provided with a limiting rib 144, that is, the second end of the filter assembly 14 is provided with a limiting rib 144, the limiting rib 144 is located outside the housing 11, and the limiting rib 144 is used to abut against the side wall of the housing 11.

[0103] In the above structural design, during the process of inserting the filter assembly 14 into the housing 11 through the pull-out port 113, when the limiting rib 144 abuts against the side wall of the housing 11, if the filter assembly 14 is not inserted further into the housing 11, the filter assembly 14 cannot be inserted further into the housing 11. This can remind the operator that the filter assembly 14 has been installed in place. At the same time, since the limiting rib 144 is located in the housing 11, it is possible to visually identify whether the limiting rib 144 abuts against the side wall of the housing 11, making it easy for the operator to identify whether the installation is in place.

[0104] In some embodiments, the filter assembly 14 may include a filter frame 141 and a filter screen 142. The filter screen 142 is fixedly disposed within the filter frame 141. By disposing the filter screen 142 within the filter frame 141, the rigidity of the filter frame 141 can be used to support the filter screen 142, thereby preventing deformation of the filter screen 142.

[0105] In some embodiments, the filter frame 141 has a mounting opening 1411 facing the bottom wall of the housing 11. The filter screen 142 is installed into the filter frame 141 through the mounting opening 1411. The mounting opening 1411 has two anti-detachment protrusions 1412, which are located on opposite sides of the filter frame 141 along its length and abut against opposite sides of the filter screen 142 along its length. This allows the two anti-detachment protrusions 1412 to press down on opposite sides of the filter screen 142 along its length, ensuring that the filter screen 142 will not fall out of the filter frame 141 during initial installation.

[0106] It should be noted that the length directions of the filter frame 141 and the filter screen 142 are both extended along the length direction of the filter assembly 14, that is, the length directions of the filter frame 141, the filter screen 142 and the filter assembly 14 are in the same direction.

[0107] Optionally, the cross-sectional shape of the anti-detachment protrusion 1412 obtained by the plane perpendicular to the opening direction of the mounting port 1411 is semi-circular. This makes the surface of the anti-detachment protrusion 1412 in contact with the filter screen 142 a smooth surface, avoiding sharp corners, thereby reducing the damage caused by the anti-detachment protrusion 1412 to the filter screen 142.

[0108] 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.

[0109] 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 inside the volute. The cavity wall of the ventilation cavity has an openable and closable third air vent and a fourth air vent, and the ventilation cavity is connected to the outside through a fifth air vent. A filter assembly is disposed within the housing, and in the direction of fresh air flow from the third air inlet to the air inlet, the filter assembly is located between the third air inlet and the air inlet; When the fresh air module is in fresh air mode, the first air vent and / or the air outlet are in the open state, and the third air vent is in the open state, while the second air vent and the fourth air vent are in the closed state. Outdoor fresh air enters the room sequentially through the fifth air vent, 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, and the third air vent is closed, while the second air vent and the fourth air vent are open. Indoor air is discharged to the outside through the second air vent, the air inlet, the impeller, the air outlet, the fourth air vent, the ventilation cavity, and the fifth air vent in sequence. The outer casing has a pull-out opening on the radial side wall of the wind turbine, and the pull-out opening and the fifth air outlet are located on the same side of the outer casing. The filter assembly has a straight plate structure. The filter assembly is movably and detachably installed inside the housing through the pull-out opening. The filter assembly can block the pull-out opening and has a portion exposed outside the housing.

2. The duct air conditioner according to claim 1, characterized in that, The included angle between the axis of the filter assembly and the axis of the impeller is α, where 0 ≤ α ≤ 15°.

3. The duct air conditioner according to claim 2, characterized in that, Along the axial direction of the impeller, the filter assembly is inclined from its connection with the volute towards the axis of the impeller.

4. The duct air conditioner according to claim 1, characterized in that, The filter assembly has a windward side and a leeward side. The leeward side intersects with the top edge of the volute and the air inlet, and the two intersect at two points. The distance between the two intersection points is less than the diameter of the impeller.

5. The duct air conditioner according to claim 1, characterized in that, The filter assembly has a first end and a second end opposite each other in its length direction, the second end blocking the pull-out opening and having a portion located outside the housing; The interior of the outer casing is provided with: A first windbreak member, wherein the first windbreak member abuts against the first end portion at least in the longitudinal direction of the filter assembly; The second wind deflector is located between the third air outlet and the filter assembly in the direction of fresh air flow from the third air outlet to the impeller. The second wind deflector abuts against the peripheral side of the second end and blocks the gap between the pull-out opening and the second end in the opening direction of the pull-out opening.

6. The duct air conditioner according to claim 1, characterized in that, The filter assembly has a first end and a second end opposite each other in its length direction, the second end blocking the pull-out opening and having a portion located outside the housing; The outer shell is provided with a first anti-detachment structure, and the second end is provided with a second anti-detachment structure. The first anti-detachment structure and the second anti-detachment structure cooperate to prevent the filter assembly from detaching from the outer shell.

7. The duct air conditioner according to claim 6, characterized in that, The first anti-detachment structure includes a slot formed on the side wall of the housing, and the slot and the pull-out opening are located on the same side wall of the housing. The second anti-detachment structure includes a hook that engages with the slot.

8. The duct air conditioner according to any one of claims 1-7, characterized in that, The filter assembly has a first side and a second side facing each other, the first side being disposed toward the bottom wall of the housing, and the second side being disposed toward the volute. The outer casing has a first elastic layer on its bottom wall facing the filter assembly, and the first elastic layer abuts against the first side portion; and / or, The surface of the volute facing the filter assembly is provided with a second elastic layer, which abuts against the second side portion.

9. The ductwork unit according to any one of claims 1-7, characterized in that, The filter assembly has a first side and a second side that are opposite each other along the axial direction of the impeller; The volute is provided with a first guide rail, the first side portion engages with the first guide rail, and can slide relative to the first guide rail; and / or, The outer casing is provided with a second guide rail on the bottom wall along the axial direction of the wind turbine. The second side portion cooperates with the second guide rail and can slide relative to the second guide rail.

10. The duct air conditioner according to claim 9, characterized in that, The height of the first guide rail protruding relative to the volute is 5mm-10mm; and / or, The second guide rail protrudes 5mm-10mm above the bottom wall of the housing.

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