A ducted air conditioner

Abstract

The application discloses a ducted air conditioner, aiming at solving the problem of low heat exchange efficiency of the indoor heat exchanger of the ducted air conditioner. The indoor unit of the ducted air conditioner comprises a shell fan assembly and an indoor heat exchanger. The fan assembly and the indoor heat exchanger are located in the mounting cavity of the shell and are spaced apart along a first linear direction, and the fan assembly is used to drive air to flow through the indoor heat exchanger. Along the first linear direction, the indoor heat exchanger is bent towards the fan assembly at opposite ends in a second linear direction. The length direction of the indoor heat exchanger, the first linear direction and the second linear direction are perpendicular to each other. The side of the indoor heat exchanger along the first linear direction towards the fan assembly is a windward side. When the air blown by the fan assembly towards the indoor heat exchanger flows through the windward side of the indoor heat exchanger, the included angle between the flow direction of the air at the position and the windward side of the indoor heat exchanger is 60°-90°. The air conditioner provided by the application is used to improve the heat exchange efficiency of the indoor unit.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a duct-type air conditioner. Background Technology

[0002] The indoor unit of a ducted air conditioner is a duct unit. Due to the advantages of duct units, such as concealed installation and easy integration with home decoration ceilings, ducted air conditioners have a better aesthetic appearance when installed indoors.

[0003] When the air conditioner is running, the fan assembly inside the duct unit rotates, causing air near the casing to enter the casing. As the air flows through the heat exchanger, it exchanges heat with the heat exchanger, and the air after heat exchange can flow out of the casing, thus regulating the temperature and / or humidity of the installation area.

[0004] Due to the limited vertical dimension of the internal space of the shell, the heat exchanger installed inside the shell can be a flat plate structure arranged at an angle. Alternatively, the heat exchanger installed inside the shell can also be a V-shaped heat exchanger formed by splicing two flat plate structures, with the opening of the heat exchanger facing the fan assembly.

[0005] However, within the shell space between the fan assembly and the heat exchanger, a significant portion of the air blown by the fan assembly towards the heat exchanger flows along the windward side surface of the heat exchanger closest to the fan assembly. This means that this portion of air does not directly flow into the gaps between adjacent fins in the heat exchanger, thus affecting the ventilation and heat exchange efficiency of the indoor heat exchanger. Summary of the Invention

[0006] The purpose of this invention is to provide a ducted air conditioner that solves the problem of low heat exchange efficiency of the indoor heat exchanger in ducted air conditioners.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention provides a ducted air conditioner, comprising an indoor unit, which includes a housing, a fan assembly, and an indoor heat exchanger. The housing has a mounting cavity, within which the fan assembly and the indoor heat exchanger are located and spaced apart along a first linear direction. The fan assembly drives airflow through the indoor heat exchanger. Along the first linear direction, the indoor heat exchanger is bent towards the fan assembly at opposite ends in a second linear direction, so that the indoor heat exchanger has openings facing the fan assembly. The longitudinal direction of the indoor heat exchanger, the first linear direction, and the second linear direction are perpendicular to each other, and the side of the indoor heat exchanger facing the fan assembly along the first linear direction is the windward side.

[0009] The indoor heat exchanger is configured such that when the air blown by the fan assembly flows through the windward side of the indoor heat exchanger, the angle between the air flow direction at that location and the windward side of the indoor heat exchanger is 60° to 90°.

[0010] Based on this, within the installation cavity of the indoor unit of a ducted air conditioning system, the fan assembly drives airflow through the indoor heat exchanger, enabling rapid heat exchange between the heat exchanger and the flowing air. During this process, on the windward side of the indoor heat exchanger near the fan assembly, the angle between the airflow direction and the corresponding windward surface is different. When the angle between the airflow direction and the windward surface is less than 60°, the air tends to adhere to the windward surface, meaning it won't flow into the gaps between adjacent fins in the indoor heat exchanger, preventing that portion of air from fully contacting the heat exchanger and exchanging heat.

[0011] Thus, in this embodiment, by changing parameters such as the opening angle of the indoor heat exchanger, the inclined installation position of the indoor heat exchanger, and the installation distance between the indoor heat exchanger and the fan assembly, the angle between the airflow direction and the windward side when some or all of the air flows over the windward side can be greater than or equal to 60°. In this way, when some or all of the air blows towards the windward side of the indoor heat exchanger, because the angle between the airflow direction and the windward side is greater than or equal to 60°, some or all of the air can flow between two adjacent fins. This allows for sufficient heat exchange between the air and the indoor heat exchanger, while the air can flow smoothly out from the leeward side of the indoor heat exchanger. It also helps to improve the airflow volume and airflow uniformity through the indoor heat exchanger, thereby improving the overall heat exchange efficiency of the indoor unit.

[0012] In some implementations, the included angle α formed by the two ends of the indoor heat exchanger being bent toward the fan assembly ranges from 75° to 85°.

[0013] In some implementations, the included angle α formed by the two ends of the indoor heat exchanger being bent toward the fan assembly ranges from 85°<α≤95° or 95°<α≤105°.

[0014] In some embodiments, the indoor heat exchanger includes multiple refrigerant pipes and multiple fins. The fins are integral, plate-like structures. The multiple fins are spaced apart along the length of the indoor heat exchanger, and the refrigerant pipes penetrate the multiple fins perpendicularly along the length of the indoor heat exchanger and are in contact with the multiple fins. The edge of the fins near the fan assembly along a first straight line is its windward edge.

[0015] In some embodiments, the fins include a first connecting piece and a second connecting piece, the second connecting piece being connected to the first connecting piece, and the included angle formed by the windward edge of the first connecting piece and the windward edge of the second connecting piece being the opening angle of the indoor heat exchanger.

[0016] In some embodiments, along the second straight line, the air outlet of the fan assembly and the first connecting piece are located on the same side near the mounting cavity.

[0017] In some implementations, the fan assembly is a centrifugal fan.

[0018] In some embodiments, the inclination ratio K of the angle between the windward edge of the first connecting piece and the first straight direction and the opening angle is in the range of: 6 / 17≤K<7 / 17, 7 / 17≤K<8 / 17, or 8 / 17≤K≤9 / 17.

[0019] In some embodiments, the inclination ratio of the angle formed by the windward edge of the first connecting piece and the first straight direction to the opening angle is 1 / 2 to 9 / 17.

[0020] In some embodiments, the opening angle is 85°, and the angle between the windward edge of the first connecting piece and the first straight direction is 45°.

[0021] In some embodiments, the maximum distance L between the windward edge of the fin and the air outlet of the fan assembly in the first straight direction is in the range of: 136mm≤L<146mm, 146mm≤L<156mm, or 156mm≤L≤166mm.

[0022] In some embodiments, the maximum distance between the windward edge of the fin and the air outlet of the fan assembly in the first straight direction is 141 to 151 mm.

[0023] In some embodiments, the height dimension of the mounting cavity in the second linear direction is 185–195 mm.

[0024] In some embodiments, the intersection of the windward edge of the first connecting piece and the windward edge of the second connecting piece is the vertex of the opening angle.

[0025] In some implementations, the first connecting piece is connected to the second connecting piece by a chamfered or rounded corner structure. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of 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.

[0027] Figure 1 This is a schematic diagram of the connection structure of a duct-type air conditioner provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 The diagram shows a structure in which a gas-liquid separator and an oil separator are installed between the compressor and the four-way valve.

[0029] Figure 3 for Figure 1 The diagram shows a connection structure where no four-way valve is provided between the compressor and the outdoor heat exchanger and the indoor heat exchanger.

[0030] Figure 4 A side view of the indoor unit of the first type of ducted air conditioner provided for the purposes of this application;

[0031] Figure 5 for Figure 4 A three-dimensional structural schematic diagram of the indoor heat exchanger shown in the figure;

[0032] Figure 6 A side view of the indoor unit of a second type of ducted air conditioner provided as an example of this application;

[0033] Figure 7 A side view of the indoor unit of a third type of ducted air conditioner provided as an example of this application;

[0034] Figure 8 A schematic diagram of a broken line relationship between the opening angle of an indoor heat exchanger and its air volume, provided in an embodiment of this application;

[0035] Figure 9 A side view of the indoor unit of a fourth type of ducted air conditioner provided for the purposes of this application;

[0036] Figure 10 A schematic diagram of a broken line relationship between the installation spacing of the indoor heat exchanger and the fan assembly and the air volume, provided for an embodiment of this application;

[0037] Figure 11 for Figure 9 The diagram shows the first type of wind field simulation when the upper end of the indoor heat exchanger is tilted at a large angle.

[0038] Figure 12 for Figure 9The diagram shows a second type of wind field simulation when the upper end of the indoor heat exchanger is tilted at a large angle.

[0039] Figure 13 A schematic diagram illustrating a broken-line relationship between the tilt ratio of an indoor heat exchanger and its air volume, provided in an embodiment of this application.

[0040] Figure 14 for Figure 9 The diagram shows the first type of wind field simulation when the upper tilt angle of the indoor heat exchanger is relatively small.

[0041] Figure 15 for Figure 9 The diagram shows the first type of wind field simulation when the upper end of the indoor heat exchanger is tilted at a small angle.

[0042] Figure label:

[0043] 100-Air conditioner;

[0044] 10-Compressor; 20-Four-way valve; 30-Outdoor heat exchanger; 40-Throttling device;

[0045] 50 - Indoor heat exchanger; 51 - Refrigerant pipe; 52 - Fins; 521 - First connecting piece; 522 - Second connecting piece; 53 - Insertion hole;

[0046] 61-Gas-liquid separator; 62-Oil separator;

[0047] 70 - Housing; 71 - Mounting cavity; 72 - Air outlet; 73 - Air inlet;

[0048] 80 - Fan assembly; 81 - Air outlet; 82 - Volute. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Unless otherwise specified, the above-described orientation can be flexibly set in practical applications, provided that the relative positional relationship shown in the accompanying drawings is satisfied.

[0051] 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly, such as fixed connection, detachable connection, or integral connection. Connections can be direct or indirect via an intermediate medium; they can be internal connections between two components or electrical connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0053] It should be noted that in practical applications, due to limitations in equipment precision or installation errors, achieving absolute parallelism or perpendicularity is difficult. The descriptions of perpendicularity, parallelism, or unidirectional orientation in this application are not absolute limitations, but rather indicate that perpendicular or parallel structural settings can be achieved within a preset error range (e.g., a vertical deviation of 5°) to achieve the corresponding preset effects. This maximizes the technical effect of the defined features and makes the corresponding technical solution easy to implement, demonstrating high feasibility.

[0054] In embodiments of the invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0055] In embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0056] An air conditioner, also known as an air conditioner, is a device that can regulate and control the temperature, humidity, and circulating air of the indoor environment of a building or structure.

[0057] like Figure 1 As shown, this application provides a ducted air conditioner (hereinafter referred to as air conditioner 100), which may include a compressor 10, a four-way valve 20, an outdoor heat exchanger 30, a throttling device 40, and an indoor heat exchanger 50. For example, refer to... Figure 1 The four-way valve 20 may have a first port A, a second port B, a third port C and a fourth port D, and the compressor 10 may have a return port and an outlet port (not shown in the figure).

[0058] The return port of compressor 10 can be connected to the first port A of the four-way valve, the outlet port of compressor 10 can be connected to the second port B of the four-way valve, the third port C of the four-way valve can be connected to one end of outdoor heat exchanger 30, the other end of outdoor heat exchanger 30 can be connected to one end of indoor heat exchanger 50 through throttling device 40, and the other end of indoor heat exchanger 50 can be connected to the fourth port D of the four-way valve.

[0059] The air conditioner 100 may include an indoor unit and an outdoor unit. The compressor 10, four-way valve 20, and outdoor heat exchanger 30 may be part of the outdoor unit, and the corresponding indoor heat exchanger 50 may be part of the indoor unit. The throttling device 40 may be a capillary tube structure or an electronic expansion valve structure. The throttling device 40 may be installed in the outdoor unit, the indoor unit, or in the refrigerant pipeline between the outdoor and indoor units, as long as the throttling device 40 is located between the indoor heat exchanger 50 and the outdoor heat exchanger 30 along the refrigerant flow direction.

[0060] Based on this, driven by the compressor 10, the refrigerant can circulate between the indoor unit and the outdoor unit and undergo a reversible phase change. While the refrigerant undergoes a phase change, it can release or absorb heat through the heat exchanger.

[0061] For example, in the outdoor unit, the refrigerant can exchange heat with the surrounding medium (such as air) through the outdoor heat exchanger 30, thereby releasing heat and heating the surrounding air (or absorbing heat to cool the nearby air). In the indoor unit, the refrigerant can exchange heat with the surrounding air through the indoor heat exchanger 50, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the nearby air).

[0062] By setting the four-way valve 20, the operating mode of the air conditioner 100 can be flexibly adjusted between hot / cold mode and heating mode, so that the air conditioner 100 can be applied to more usage scenarios.

[0063] When the air conditioner 100 is in cooling or dehumidifying mode, Figure 1 As shown by the solid arrow, the four-way valve 20 can be adjusted to connect the second port B and the third port C, and to connect the fourth port D and the first port A.

[0064] Thus, the high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the outlet through the second port B and the third port C of the four-way valve 20 to the outdoor heat exchanger 30, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied at the outdoor heat exchanger 30 and release heat to heat the air near the outdoor heat exchanger 30.

[0065] Subsequently, under the action of the throttling device 40, the pressure of the liquid refrigerant flowing into the indoor heat exchanger 50 after passing through the throttling device 40 is reduced, allowing the liquid refrigerant to absorb heat and vaporize at the indoor heat exchanger 50. This facilitates heat exchange and transfer between the outdoor heat exchanger 30 and the indoor heat exchanger 50, cooling the air near the indoor heat exchanger 50. The vaporized refrigerant flowing out of the indoor heat exchanger 50 can sequentially flow through the fourth port D and the first port A of the four-way valve 20. Then, the gaseous refrigerant can be drawn into the compressor 10 through the return port and compressed, thus achieving refrigerant circulation.

[0066] When the air conditioner 100 is in heating mode, Figure 1 Taking the dashed arrow shown as an example, the four-way valve 20 can be adjusted to make the second port B and the fourth port D open, and to make the third port C and the first port A open.

[0067] Thus, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the outlet through the second port B and the fourth port D of the four-way valve 20 to the indoor heat exchanger 50, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied at the indoor heat exchanger 50 and release heat to heat the air near the indoor heat exchanger 50.

[0068] Subsequently, under the action of the throttling device 40, the pressure of the liquid refrigerant flowing into the outdoor heat exchanger 30 after passing through the throttling device 40 is reduced, allowing the liquid refrigerant to absorb heat and vaporize at the outdoor heat exchanger 30. This facilitates heat exchange and transfer between the outdoor heat exchanger 30 and the indoor heat exchanger 50, cooling the air surrounding the outdoor heat exchanger 30. The vaporized refrigerant can then flow sequentially through the third port C and the first port A of the four-way valve 20. The gaseous refrigerant can then be drawn into the compressor 10 through the return port and compressed, thus achieving refrigerant circulation.

[0069] To prevent the gaseous refrigerant drawn into the compressor 10 through the return port from being mixed with liquid refrigerant or impurities, such as... Figure 2 As shown, the air conditioner 100 may further include a gas-liquid separator 61. The gas-liquid separator 61 can be installed between the first port A of the four-way valve 20 and the return port of the compressor 10, so that the first port A can be connected and energized with the return port of the compressor 10 through the gas-liquid separator 61. In this way, when gaseous refrigerant mixed with impurities such as liquid refrigerant or lubricating oil flows through the gas-liquid separator 61 to the return port of the compressor 10, the gas-liquid separator 61 can separate non-gaseous impurities (such as liquid refrigerant, liquid lubricating oil, or other impurities) to prevent these impurities from entering the compressor 10 and affecting the stable operation of the compressor 10.

[0070] Continue to refer to Figure 2 The air conditioner 100 may also include an oil separator 62, and the outlet of the compressor 10 and the second port B of the four-way valve 20 can also be connected and circulated through the oil separator 62. In this way, the lubricating oil mixed in the high-temperature and high-pressure gaseous refrigerant can be separated during the flow of the oil separator 62, thereby preventing the lubricating oil from adhering to the inner walls of the outdoor heat exchanger 30 and the indoor heat exchanger 50 along with the refrigerant, so as to enable the indoor heat exchanger 50 and the outdoor heat exchanger 30 to have higher heat exchange efficiency.

[0071] In some other embodiments, a four-way valve may not be necessary. For example... Figure 3 As shown, the outlet of compressor 10 can be connected to one end of throttling device 40 via outdoor heat exchanger 30, and the return port of compressor 10 can be connected to the other end of throttling device 40 via gas-liquid separator 61 and indoor heat exchanger 50 in sequence. This allows the refrigerant to circulate among compressor 10, outdoor heat exchanger 30, throttling device 40, indoor heat exchanger 50, gas-liquid separator 61, and compressor 10. At this time, outdoor heat exchanger 30 can be used to heat the nearby air, and indoor heat exchanger 50 can be used to cool the nearby air, so that air conditioner 100 can operate in cooling mode or dehumidification mode (i.e., cooling-only mode).

[0072] Based on this, such as Figure 4As shown, the indoor unit with a duct structure may include a housing 70, a fan assembly 80, and an indoor heat exchanger 50. The housing 70 may have a mounting cavity 71, and the fan assembly 80 and the indoor heat exchanger 50 may be arranged at intervals within the mounting cavity 71. Taking the fan assembly 80 and the indoor heat exchanger 50 in the mounting cavity 71 as being distributed at intervals along the front-back direction (i.e., the first straight line direction), the housing 70 may have an air outlet 72 on the front side of the mounting cavity 71, and the housing 70 may have an air inlet 73 on the rear side of the mounting cavity 71, so that the fan assembly 80 can drive air to flow through the indoor heat exchanger 50.

[0073] Based on this, within the mounting cavity 71, the indoor heat exchanger 50 can be positioned close to the front air outlet 72, and the fan assembly 80 can be positioned close to the rear air inlet 73. Thus, when the air conditioner is running, the fan assembly 80 can rotate, drawing air from the air inlet 73 into the mounting cavity 71, and blowing it from the air outlet of the fan assembly 80 towards the indoor heat exchanger 50, allowing the refrigerant flowing within the indoor heat exchanger 50 to rapidly exchange heat with the passing air.

[0074] like Figure 4 and Figure 5 As shown, the length direction of the indoor heat exchanger 50 and the shell 70 can be left-right. The indoor heat exchanger 50 can include multiple refrigerant pipes 51 and multiple fins 52. The refrigerant pipes 51 can extend in the left-right direction, and the fins 52 can be an integral plate structure. The multiple fins 52 can be distributed at intervals in the left-right direction (i.e., the length direction of the indoor heat exchanger 50). The refrigerant pipes 51 can pass through the fins 52 in the left-right direction and contact and connect with the multiple fins 52 to form an integral structure of the indoor heat exchanger 50.

[0075] Combination Figure 4 Multiple insertion holes 53 can be formed on a single fin 52, and these insertion holes 53 are aligned in the left-right direction. This allows the refrigerant pipes 51 passing through the insertion holes 53 and fin 52 to connect with the fins while also being spaced apart within the plane of the fins 52. In this way, the refrigerant pipes 51 can be interconnected to form one or more refrigerant passages, enabling the flowing refrigerant to fully contact the air through the refrigerant pipes 51 and fins 52, thereby improving the heat exchange efficiency of the indoor heat exchanger 50.

[0076] Taking a rectangular plate-like structure as an example, multiple fins 52 and multiple refrigerant pipes 51 can be connected to form a structure like... Figure 5 The plate heat exchanger shown is an example. Figure 4Within the mounting cavity 71 shown, since the height dimension of the mounting cavity 71 in the vertical direction (i.e., the second straight direction) is limited, the upper edge of the flat plate structure indoor heat exchanger 50 can be arranged backward, which can increase the heat exchange area of ​​the indoor heat exchanger 50 within the limited height space, such as the length dimension of the fins 52.

[0077] In some other embodiments, such as Figure 6 As shown, multiple flat-plate heat exchangers can also be spliced ​​together. For example, two heat exchangers can be spliced ​​together in the vertical direction, and the lower edge of the upper heat exchanger can be connected to the upper edge of the lower heat exchanger to form a spliced ​​indoor heat exchanger 50. Taking the indoor heat exchanger 50 formed by splicing two flat-plate heat exchangers as an example, along the second straight line direction, the upper end of the indoor heat exchanger 50 can be tilted or bent backward, and the lower end of the indoor heat exchanger 50 can also be tilted or bent backward, so that the indoor heat exchanger 50 can form an opening facing the fan assembly 80.

[0078] Thus, in a plane perpendicular to the front-back direction, the cross-section of the indoor heat exchanger 50 can be approximately V-shaped, meaning that both the upper and lower ends of the indoor heat exchanger 50 can be arranged backwards within the mounting cavity 71 to increase the contact area between the indoor heat exchanger 50 (especially the fins 52) and the air within the mounting cavity 71.

[0079] However, within the mounting cavity 71, the air outlet of the fan assembly 80 is offset to one side of the mounting cavity 71 in the vertical direction, such as the air outlet of the fan assembly 80 being positioned towards the top. As a result, the airflow side (i.e., the rear side) of the indoor heat exchanger 50 facing the fan assembly 80 cannot be evenly contacted with the air, thus affecting the ventilation volume and heat exchange effect of the indoor heat exchanger 50, meaning the overall heat exchange efficiency of the indoor unit is low.

[0080] Furthermore, within the mounting cavity 71 between the indoor heat exchanger 50 and the fan assembly 80, on the upper windward side of the indoor heat exchanger 50, a significant amount of air flows along its windward surface. This means that this portion of air does not directly flow into the gap between two adjacent fins 52, thus affecting the ventilation and heat exchange efficiency of the indoor heat exchanger.

[0081] Based on this, the opening size of the indoor heat exchanger 50 can be adjusted, and / or the installation position of the indoor heat exchanger 50 relative to the fan assembly 80 can be adjusted. In this way, when the air blown by the fan assembly towards the indoor heat exchanger 50 flows through its windward side, the angle between the airflow direction at that location and the windward side of the indoor heat exchanger 50 can be set to 60°–90°. This helps improve the uniformity of airflow and the ventilation volume on the windward side of the indoor heat exchanger 50, thereby improving the heat exchange efficiency of the indoor heat exchanger 50.

[0082] It should be noted that, in this embodiment of the application, the value range of 60° to 90° is taken as an example. If there is no larger range, it means that the included angle range is greater than or equal to 60° and less than or equal to 90°. That is, unless otherwise specified, the value range on both sides of the symbol "~" includes equal to.

[0083] In some embodiments, the indoor heat exchanger 50 located within the mounting cavity 71 may have an opening structure facing the fan assembly 80. The indoor heat exchanger 50 may be... Figure 6 The splicing structure shown can also be Figure 7 The indoor heat exchanger 50 is shown as an integrated structure. Based on this, the opening angle α formed by the bending of the upper and lower ends of the indoor heat exchanger 50 toward the fan assembly 80 can be set to 75° to 105°, that is, the range of the opening angle can be greater than or equal to 75° and less than or equal to 105°, in order to improve the heat exchange efficiency of the indoor heat exchanger 50.

[0084] Combination Figure 7 and Figure 8 While keeping the fan assembly speed constant at 80 rpm, simulation experiments show that as the opening angle α of the indoor heat exchanger 50 increases from 75° to 105°, the airflow through the indoor heat exchanger 50 gradually increases per unit time. Specifically, the airflow increase is largest when the opening angle increases from 85° to 95°, followed by the increase when the opening angle increases from 75° to 85°, and smallest when the opening angle increases from 95° to 105°.

[0085] Based on this, the range of the opening angle α can be 75° to 85°. Correspondingly, the airflow through the indoor heat exchanger 50 with an opening angle of 75° is approximately 567 m³ / h. 3 The hourly airflow through the indoor heat exchanger 50 with an opening angle of 85° is approximately 575 m³ / h. 3 per hour.

[0086] Alternatively, the range of the opening angle can be set to 85° < α ≤ 95° or 95° < α ≤ 105°. For example, the airflow through an indoor heat exchanger 50 with an opening angle of 95° is approximately 588 m³ / s. 3 The hourly airflow through the indoor heat exchanger 50 with an opening angle of 105° is approximately 589 m³ / h. 3 per hour.

[0087] The air volume is approximately 570m³. 3The opening angle of the indoor heat exchanger 50 with a capacity of / h can be 78°, meaning the opening angle can also be set to 75°≤α<78° or 78°≤α≤85°. Correspondingly, the air volume is approximately 580 m³ / h. 3 The opening angle of the indoor heat exchanger with an air volume of 50 m³ / h can be 88.6°, and the air volume is approximately 585 m³ / h. 3 The opening angle of the indoor heat exchanger 50 per hour can be 92.7°, that is, the opening angle can also be set to 85°≤α<88.6°, 88.6°≤α<92.7° or 92.7°≤α≤95°.

[0088] Within the mounting cavity 71, due to the limited height of the indoor unit with its duct-type structure, such as Figure 7 As shown, the height H of the mounting cavity 71 in the vertical direction can be 185-195mm, that is, 185mm≤H≤195mm. In other words, the maximum height of the indoor heat exchanger 50 in the vertical direction can be H. For example, the height of the mounting cavity 71 can be 185mm, 187mm, 190mm, 192mm or 195mm, etc., without limitation.

[0089] With a fixed height of the indoor heat exchanger 50, a smaller opening angle of the indoor heat exchanger 50 indicates a longer profile of the windward edge of the indoor heat exchanger 50 in a plane perpendicular to the left and right directions, resulting in a larger heat exchange area. However, this also means a longer path for air to flow through the indoor heat exchanger 50 in the front-to-back direction. Although the air can exchange heat with the indoor heat exchanger 50 through a longer contact time, it also leads to a lower air velocity (i.e., reduced airflow) on the surface of the indoor heat exchanger 50 at the same fan speed as the fan assembly 80.

[0090] Therefore, if the opening angle of the indoor heat exchanger 50 is less than 75°, although the heat exchange area of ​​the indoor heat exchanger 50 is large, it will result in greater air resistance (i.e., the negative effects of air resistance outweigh the beneficial effects of increasing the heat exchange area). This means that the airflow through the indoor heat exchanger 50 will be smaller, and the overall heat exchange efficiency of the indoor heat exchanger 50 will also decrease. Conversely, if the opening angle of the indoor heat exchanger 50 is greater than 105°, although the air resistance of the indoor heat exchanger 50 is smaller, the beneficial effects of increased airflow caused by an opening angle greater than 105° outweigh the negative effects of reduced heat exchange area (i.e., excessively high air velocity and insufficient heat exchange), which will also lead to a decrease in the overall heat exchange efficiency of the indoor heat exchanger 50.

[0091] In summary, setting the opening angle of the indoor heat exchanger 50 between 75° and 105° not only helps to increase the heat exchange area of ​​the indoor heat exchanger 50, but also helps to increase the air volume of the indoor unit, thereby improving the heat exchange efficiency and the cooling or heating speed. Based on this, while taking into account both the heat exchange efficiency and heat exchange speed (i.e., air volume) of the indoor unit, the opening angle can be set to 85°, which allows the indoor heat exchanger 50 to have a higher heat exchange efficiency, or the opening angle can be set to 95° (corresponding to a higher heat exchange speed).

[0092] It should be noted that, in the embodiments of this application, if the indoor heat exchanger 50 is a modular structure, in the cross-section perpendicular to the left and right directions, such as Figure 6 As shown, the included angle is the angle between the two backward-sloping flat plate heat exchangers.

[0093] In some embodiments, if there is sufficient height space in the mounting cavity 71, or if the width of the plate heat exchanger is small, one or more plate heat exchangers can be connected between two inclined plate heat exchangers. This allows the indoor heat exchanger 50 to have a C-shaped or W-shaped splicing structure in a cross-section perpendicular to the left-right direction; there is no limitation on this.

[0094] In addition, combined Figure 7 The indoor heat exchanger 50 can also be a one-piece structure with a rearward opening. The fins 52 can be a one-piece plate structure, which can include a first connecting piece 521 and a second connecting piece 522, and the first connecting piece 521 can be connected to the second connecting piece 522.

[0095] The fins 52 can be sheet-like structures arranged perpendicular to the left-right direction (i.e., the second straight line direction), meaning the angle formed by the windward side (i.e., rear side) edge of the first connecting piece 521 and the windward side edge of the second connecting piece 522 is the opening angle α. Thus, multiple fins 52 are spaced apart in the left-right direction, and multiple refrigerant pipes 51 sequentially pass through insertion holes 53 along the left-right direction to contact and connect the multiple fins 52, thereby forming an integrated indoor heat exchanger 50.

[0096] During the installation of the indoor heat exchanger 50, the refrigerant pipe 51 is simply passed through multiple fins 52 sequentially, and the refrigerant pipe 51 and multiple fins 52 can be connected by brazing to achieve contact heat exchange between them. No additional splicing operations are required, which has the advantage of simple structure.

[0097] It should be noted that, in combination Figure 7 and Figure 9The first connecting piece 521 of the fin 52 can be located above the second connecting piece 522, such that the lower end of the first connecting piece 521 can contact and connect with the upper end of the second connecting piece 522 to form an integral sheet-like structure of the fin 52. Figure 7 As shown, the windward edge (i.e., the rear edge) of the first connecting piece 521 can be approximately a straight-line structure, and the windward edge of the second connecting piece 522 can also be approximately a straight-line structure. The front end of the windward edge of the first connecting piece 521 can form an opening angle with the front end of the windward edge of the second connecting piece 522, that is, the vertex of the opening angle can be located at the intersection of the two windward edges (approximately a V-shaped fin).

[0098] Furthermore, to maximize the proportion of the angle between the windward edge of fin 52 and the direction of airflow within the range of 60° to 90°, combined with... Figure 9 The first connecting piece 521 can also be connected to the second connecting piece 522 through a rounded or chamfered structure. For example, the windward edge of the first connecting piece 521 and the windward edge of the second connecting piece 522 can be connected through a rounded or chamfered edge, which helps to make the angle between the chamfered or rounded edge of the windward edge and the flowing air between 60° and 90°, so that the indoor heat exchanger 50 can take into account both ventilation volume and heat exchange effect, thereby improving the overall heat exchange effect of the indoor unit.

[0099] It should be noted that in the above embodiments, the fin 52 can also be an arc-shaped or circular arc-shaped sheet structure. In this case, it can be regarded as a third connecting piece with an arc-shaped rounded corner structure between the first connecting piece 521 and the second connecting piece 522. The upper and lower ends of the third connecting piece can be bent and extended backward, and can be connected to the first connecting piece 521 and the second connecting piece 522, which are approximately rectangular sheet structures. The angle between the straight lines of the windward edges of the first connecting piece 521 and the second connecting piece 522 is the opening angle. For example, the fin can be approximately C-shaped.

[0100] In some other embodiments, the fin 52 may also include a first connecting piece 521, a fourth connecting piece, a fifth connecting piece, and a second connecting piece 522 that are bent and connected in sequence to form a sheet-like fin 52 that is approximately W-shaped. Alternatively, the fourth connecting piece and the fifth connecting piece may be connected by a third connecting piece with a rectangular structure, so that there is a gap between the two openings of the W shape in the vertical direction, which is beneficial to improving the heat exchange area and heat exchange efficiency of the indoor heat exchanger.

[0101] In the case where fin 52 includes a fourth connecting piece and a fifth connecting piece, the windward edge line and / or leeward edge line between two adjacent connecting pieces can be connected by rounded corners or chamfers.

[0102] Since the length direction of the indoor heat exchanger 50 is the second straight line direction, within the mounting cavity 71, such as Figure 9 As shown, the installation distance between the indoor heat exchanger 50 and the fan assembly 80 in the front-to-back direction can also be adjusted. The maximum distance between the windward edge of the fins 52 and the air outlet 81 of the fan assembly 80 in the front-to-back direction is defined as L, that is, L is the installation distance between the fan assembly 80 and the indoor heat exchanger 50. It can be set to 136mm≤L≤166mm, which is beneficial to improving the heat exchange effect of the indoor heat exchanger 50.

[0103] Combination Figure 9 and Figure 10 While keeping the fan assembly 80 speed and other dimensions of the indoor heat exchanger 50 unchanged, the simulation comparison experiment shows that as the installation distance between the indoor heat exchanger 50 and the fan assembly 80 increases from 136mm to 166mm, the air volume flowing through the indoor heat exchanger 50 per unit time first increases and then decreases.

[0104] For example, the airflow through the indoor heat exchanger 50 with an installation spacing of 136 mm is approximately 580.5 m³ / s. 3 / h, the airflow through indoor heat exchanger 50 with an installation spacing of 146mm is approximately 584.1m³ / h. 3 / h, the airflow through the indoor heat exchanger 50 with an installation spacing of 156mm is approximately 581m³ / h. 3 / h, the airflow through the indoor heat exchanger 50 with an installation spacing of 166mm is approximately 575m³ / h. 3 Based on this, the installation distance L between the indoor heat exchanger 50 and the fan assembly 80 can also be set as: 136mm≤L<146mm, 146mm≤L<156mm, or 156mm≤L≤166mm. Within the above four installation distance ranges, the airflow through the indoor heat exchanger 50 can change linearly.

[0105] Therefore, the installation spacing L of the indoor heat exchanger 50 can also be set to 141mm ≤ L ≤ 151mm, so that the airflow through the indoor heat exchanger 50 is 582.5m³. 3 The airflow rate is above 1000 m / h, allowing for a larger fit error range when assembling the indoor heat exchanger 50 and fan assembly 80 (facilitating indoor unit assembly). Furthermore, this design allows the angle between the fins at the windward edge and the direction of airflow to be 60°–90°, enabling the indoor heat exchanger 50 to balance ventilation volume and heat exchange efficiency, thereby improving the overall heat exchange performance of the indoor unit.

[0106] For example, if the height H of the mounting cavity 71 is 185mm to 195mm, and the installation distance between the fan assembly 80 and the indoor heat exchanger 50 is about 146mm, then the airflow through the indoor heat exchanger 50 is relatively large, at 585m³ / h. 3 / h, which helps improve the overall heat exchange effect of the indoor unit.

[0107] For the indoor heat exchanger 50, within the mounting cavity 71, the indoor heat exchanger 50 can be installed symmetrically relative to the front-back and left-right planes, or the upper end of the indoor heat exchanger 50 (i.e., the first connecting piece 521) can be installed tilted backward, with the tilt angle being either large or small.

[0108] Based on this, the upper end of the indoor heat exchanger 50 (i.e., at the first connecting piece) can be set to have a larger backward tilt angle, meaning that the first connecting piece 521 can have a larger length dimension than the second connecting piece 522. Since the air outlet of the fan assembly 80 is arranged at the top, it can be seen through experimental simulation of the air field of the indoor heat exchanger 50 at this time.

[0109] like Figure 11 and Figure 12 As shown, at the windward edge of the plurality of first connecting pieces 521 (area A in the figure), most of the air at the windward edge of the first connecting piece 521 has a small angle with the edge (e.g., the angle is less than 60°), so that most of the air will flow along the indoor heat exchanger 50 (e.g., Figure 9 As shown, the airflow is directed towards the windward side surface, meaning that this portion of the air does not flow into the gap between two adjacent fins 52. This significantly reduces the airflow through the upper region of the indoor heat exchanger 50.

[0110] It should be noted that, in this embodiment, the maximum angle between the air and the windward edge of the first connecting piece 521 or the windward surface of the indoor heat exchanger is 90°. That is, there is no case where the angle between the airflow direction and the windward surface is an obtuse angle.

[0111] Combination Figure 11 and Figure 12 Within the mounting cavity 71 behind the multiple second connecting pieces 522 (area B in the figure), air will form a vortex region, thereby causing the indoor heat exchanger 50 (such as...) Figure 9 As shown, the airflow in the lower region decreases.

[0112] Based on this, and in conjunction with the above embodiments, by setting the opening angle of the indoor heat exchanger 50 to 75°–105° and the installation distance between the indoor heat exchanger 50 and the fan assembly 80 to 136mm–166mm, the angle between the air flowing through the windward side of the indoor heat exchanger 50 and the fan assembly 80 can be between 60° and 90°. This improves the airflow along the windward surface of the indoor heat exchanger 50 and reduces the vortex in the lower rear mounting cavity 71 of the indoor heat exchanger 50, thereby increasing the airflow through the indoor heat exchanger 50 per unit time and improving the heat exchange efficiency of the indoor heat exchanger 50.

[0113] Based on this, such as Figure 9 As shown, when arranging the indoor heat exchanger 50 within the mounting cavity 71, the inclination ratio K of the angle θ formed by the windward edge of the first connecting piece 521 and the front-back direction (i.e., the first straight line direction) to the opening angle α can be set to a range of 6 / 17 ≤ K = θ / α ≤ 9 / 17. This allows more air flowing through the windward side of the indoor heat exchanger 50 to have an angle between it and the windward edge between 60° and 90°, thereby improving the airflow along the windward surface of the indoor heat exchanger 50. For example, it allows more air to flow directly forward into the gap between two adjacent first connecting pieces 521, and it reduces the vortex within the mounting cavity 71 at the lower rear of the indoor heat exchanger 50, thereby increasing the airflow through the indoor heat exchanger 50 per unit time and improving heat exchange efficiency.

[0114] Combination Figure 9 and Figure 13 While keeping the fan assembly speed 80 and other dimensions of the indoor heat exchanger 50 constant, simulation experiments show that as the tilt ratio K of the indoor heat exchanger 50 increases from 6 / 17 to 9 / 17, the airflow through the indoor heat exchanger 50 per unit time gradually increases. Specifically, the increase in airflow through the indoor heat exchanger 50 is relatively small when the tilt ratio increases from 6 / 17 to 7 / 17, while the increase in airflow through the indoor heat exchanger 50 is approximately the same when the tilt ratio increases from 7 / 17 to 9 / 17.

[0115] For example, the airflow through the indoor heat exchanger 50 with an inclination ratio of 6 / 17 is approximately 573 m³ / h. 3 / h, the airflow through indoor heat exchanger 50 with an inclination ratio of 7 / 17 is approximately 574m³ / h. 3 / h, the airflow through indoor heat exchanger 50 with an inclination ratio of 8 / 17 is approximately 582.5 m³ / h. 3 / h, the airflow through indoor heat exchanger 50 with an inclination ratio of 9 / 17 is approximately 591.5m³ / h. 3 / h. Based on this, the tilt ratio K of the indoor heat exchanger 50 during installation can also be set as: 6 / 17≤K<7 / 17, 7 / 17≤K<8 / 17 or 8 / 17≤K<9 / 17. In the above three value ranges, the air volume flowing through the indoor heat exchanger 50 can change linearly, and the rate of change of air volume in the latter two ranges is approximately the same.

[0116] Within the mounting cavity 71, since the indoor heat exchanger 50 needs to drain condensate downwards, if the inclination ratio of the indoor heat exchanger 50 is less than 6 / 17, meaning the second connecting piece 522 is longer and the length difference between it and the first connecting piece 521 is larger, the angle between the second connecting piece 522 and the vertical direction will be smaller. This results in a smaller installation slope for the second connecting piece 522, which is detrimental to the flow of condensate from the second connecting piece 522 into the drip tray below, leading to poor drainage performance of the indoor unit.

[0117] Correspondingly, if the tilt ratio of the indoor heat exchanger 50 is greater than 9 / 17, that is, the length of the first connecting piece 521 is greater, and the angle θ between the windward edge of the first connecting piece 521 and the front-rear direction is smaller. Figure 11 and Figure 12 As shown in the wind field simulation experiment, more air flows along the surface of the indoor heat exchanger 50 on the windward side, and eddies are formed, thereby reducing the airflow through the indoor heat exchanger 50.

[0118] Based on this, by setting the tilt ratio of the indoor heat exchanger 50 during installation to 6 / 17≤K≤9 / 17, combined with... Figure 9 and Figure 14 This allows the first connecting piece 521 to have a larger installation angle with the front-rear direction. Thus, at the windward edge of the first connecting piece 521 ( Figure 14 In the area at point A, the direction of air flow can be at an angle of 60° to 90° with the windward edge of the indoor heat exchanger 50, thereby preventing air from flowing along the windward surface of the indoor heat exchanger 50 and improving air circulation.

[0119] For example, when arranging the tilt ratio of the indoor heat exchanger 50 in the mounting cavity 71, it can also be set to 1 / 2≤K≤9 / 17, which is beneficial to improve the adaptation error range when assembling the indoor heat exchanger 50 and facilitates the assembly of the indoor unit.

[0120] Based on this, in the mounting cavity 71, parameters such as the opening angle α and tilt ratio K of the indoor heat exchanger 50, as well as the installation distance L between the indoor heat exchanger 50 and the fan assembly 80, are coupled and set. It is possible to configure 80°≤α≤90°, 1 / 2≤K≤9 / 17, and 141mm≤L≤151mm. Combined with... Figure 14 and Figure 15As shown in the wind field simulation diagram, less air flows along the surface of the indoor heat exchanger 50 on the windward side and there are fewer eddies, so that the airflow passing through the indoor heat exchanger 50 per unit time is larger, thereby improving the overall heat exchange efficiency of the indoor unit.

[0121] For example, the installation distance L between the indoor heat exchanger 50 and the fan assembly 80 can be configured as 141mm, 143mm, 146mm, 148mm, 150mm, and 151mm; the opening angle α of the indoor heat exchanger 50 can be configured as 80°, 82°, 85°, 87°, and 90°; and the tilt ratio parameter K of the indoor heat exchanger 50 during installation can be configured as 1 / 2, 35 / 68, and 9 / 17, etc. During the installation of the indoor heat exchanger 50 and the fan assembly 80, the units of the above parameters can be configured individually within the installation cavity 71, or the tilt ratio parameter, installation distance parameter, and opening angle parameter can be configured simultaneously to ensure better heat exchange efficiency for the indoor heat exchanger 50 and the indoor unit; this is not limited.

[0122] Regarding the tilt parameter K of the indoor heat exchanger 50, taking K = 9 / 17 as an example, when the opening angle of the indoor heat exchanger 50 is 85°, the angle θ formed by the windward edge of the first connecting piece 521 and the front-back direction can be configured to be 45°. This increases the ventilation volume of the indoor unit per unit time and also improves the heat exchange efficiency of the indoor heat exchanger 50.

[0123] It should be noted that, as Figure 7 and Figure 9 As shown, the fan assembly 80 can be a centrifugal fan, including a volute 82, a centrifugal impeller, and a motor. The air outlet 81 of the volute 82 can be located near the top of the mounting cavity 71, that is, the air outlet 81 can be positioned forward toward the first connecting piece 521. Along the length of the indoor heat exchanger 50, two or more centrifugal fans can be arranged at intervals within the mounting cavity 71 so that the fan assembly 80 can drive a sufficient amount of air to flow through the indoor heat exchanger 50.

[0124] Furthermore, the fan assembly 80 can also be an axial fan structure, the diameter of which can be smaller than the height of the mounting cavity 71. Behind the indoor heat exchanger 50, one or more axial fans can be arranged close to the top of the mounting cavity 71, and the outlets of the axial fans can be directed towards the multiple first connecting plates 521, without limitation.

[0125] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0126] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A ducted air conditioner comprising an indoor unit, characterized by, The indoor unit comprises: a housing having a mounting cavity; a fan assembly; and an indoor heat exchanger, the fan assembly and the indoor heat exchanger being located in the mounting cavity and being spaced apart along a first linear direction, the fan assembly being configured to drive air to flow through the indoor heat exchanger; along the first linear direction, the indoor heat exchanger is bent at opposite ends in a second linear direction towards the fan assembly, so that the indoor heat exchanger has an opening towards the fan assembly; the length direction of the indoor heat exchanger, the first linear direction and the second linear direction are perpendicular to each other; a windward side of the indoor heat exchanger is located on a side of the indoor heat exchanger along the first linear direction towards the fan assembly, and the indoor heat exchanger is configured to: air blown by the fan assembly towards the indoor heat exchanger has a flow direction at a position on the windward side of the indoor heat exchanger, and an included angle between the flow direction of at least part of the air and the windward side of the indoor heat exchanger is 60°-90°; an opening included angle α formed by the bending of the two ends of the indoor heat exchanger towards the fan assembly is in a range of 75°≤α≤105°.

2. The ducted air conditioner according to claim 1, wherein an opening included angle α formed by the bending of the two ends of the indoor heat exchanger towards the fan assembly is in a range of 75°≤α≤85°.

3. The ducted air conditioner according to claim 1, wherein an opening included angle α formed by the bending of the two ends of the indoor heat exchanger towards the fan assembly is in a range of 85°<α≤95° or 95°<α≤105°.

4. The ducted air conditioner according to any one of claims 1 to 3, characterized in that, The indoor heat exchanger comprises: a plurality of refrigerant tubes; and a plurality of fins, the fins being an integral sheet structure; the plurality of fins are spaced apart along the length direction of the indoor heat exchanger, and the refrigerant tubes vertically pass through and are connected to the plurality of fins along the length direction of the indoor heat exchanger; an edge of the fin along the first linear direction close to the fan assembly is a windward side edge of the fin; the fin comprises: a first connecting sheet; and a second connecting sheet connected to the first connecting sheet, and an included angle between the windward side edge of the first connecting sheet and the windward side edge of the second connecting sheet is an opening included angle of the indoor heat exchanger.

5. The ducted air conditioner according to claim 4, wherein along the second linear direction, the air outlet of the fan assembly and the first connecting sheet are located on the same side close to the mounting cavity; and / or, the fan assembly is a centrifugal fan.

6. The ducted air conditioner according to claim 4, wherein an included angle between the windward side edge of the first connecting sheet and the first linear direction and an inclination ratio K of the opening included angle is in a range of 6 / 17≤K<7 / 17, 7 / 17≤K<8 / 17 or 8 / 17≤K≤9 / 17.

7. The ducted air conditioner according to claim 4, wherein the included angle between the windward side edge of the first connecting sheet and the first linear direction and the inclination ratio of the opening included angle is 1 / 2-9 / 17; and / or, the opening included angle is 85°, and the included angle between the windward side edge of the first connecting sheet and the first linear direction is 45°.

8. The ducted air conditioner according to claim 4, wherein The maximum distance L between the windward side edge of the fin and the air outlet of the fan assembly in the first linear direction ranges from 136 mm to 166 mm.

9. The ducted air conditioner according to claim 4, wherein The maximum distance L between the windward side edge of the fin and the air outlet of the fan assembly in the first linear direction ranges from 136 mm to 166 mm. The height dimension of the mounting cavity in the second linear direction ranges from 185 mm to 195 mm.

10. The ducted air conditioner according to claim 4, wherein The intersection point of the windward side edge of the first connecting piece and the windward side edge of the second connecting piece is the vertex of the opening angle; or The first connecting piece is connected to the second connecting piece through a chamfered or rounded structure.

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