A duct system and an air conditioning unit having the same.

Abstract

This invention relates to the field of air ducts, and more particularly to an air duct system and an air conditioning unit having the same. The air duct system includes: a volute section having an upward-facing air outlet; a guide section including a rear plate and two side plates, the two side plates being disposed opposite each other on the left and right sides of the air outlet, and the rear plate being disposed behind the air outlet and sealed to the two side plates; and an indoor heat exchanger overlapping between the two guide sections with its windward heat exchange surface facing the rear plate. The indoor heat exchanger, the volute section, and the guide section together form an air supply cavity. Airflow exiting through the air outlet of the volute section is guided by the guide section and flows entirely into the indoor heat exchanger through the air supply cavity. In this way, the airflow exiting through the air outlet of the volute section is guided by the guide section and flows entirely into the indoor heat exchanger through the air supply cavity, avoiding airflow loss caused by the baffle plate obstructing the air, thereby improving the heat exchange efficiency of the indoor heat exchanger.

Description

Technical Field

[0001] This invention relates to the field of air ducts, and more particularly to an air duct system and an air conditioning unit having the same. Background Technology

[0002] A typical floor-standing air conditioner unit consists of an evaporator, piping, electrical components, a motor, fan blades, a volute assembly, and a casing. Square floor-standing air conditioners often use a straight-plate parallel-flow evaporator, which is placed at an angle at the top of the unit. The volute assembly is located at the bottom, and the motor and centrifugal fan blades are housed inside the volute. When the air conditioner is running, the motor drives the fan blades, creating an airflow that rises from bottom to top. After heat exchange in the evaporator, the air is blown out as the desired cool or warm air.

[0003] In related technologies, two baffles are usually installed on both sides of the evaporator to block the airflow. Some of the airflow bounces back after passing through the baffles and then flows back to the evaporator, resulting in a reduction in the air supply pressure and affecting the heat exchange efficiency of the evaporator. Summary of the Invention

[0004] To address the technical problem of airflow loss caused by installing baffles on both sides of the evaporator in related technologies, a duct system and an air conditioning unit with it are proposed.

[0005] According to one aspect of the present invention, an air duct system is provided, comprising: a volute portion having an upward-facing air outlet; a flow guide portion including a rear plate and two side plates, the two side plates being disposed opposite each other on the left and right sides of the air outlet, the rear plate being disposed on the rear side of the air outlet and sealingly connected to the two side plates; and an indoor heat exchanger overlapping between the two flow guide portions with its windward heat exchange surface facing the rear plate. The indoor heat exchanger, the volute portion, and the flow guide portion together form an air supply cavity, wherein the airflow flowing out through the air outlet of the volute portion flows entirely into the indoor heat exchanger through the air supply cavity under the guidance of the flow guide portion.

[0006] Furthermore, a first air guide structure is provided on the opposing surfaces of the two side plates. The first air guide structure forms a tip with a gradually decreasing width, and the tip of the first air guide structure is directed toward the indoor heat exchanger.

[0007] Furthermore, the first air guide structure has an arc-shaped centerline with an end point P near the tip and an end point Q away from the tip. The tangent of the centerline passing through the end point P is perpendicular to the heat exchange surface of the indoor heat exchanger, and the tangent of the centerline passing through the end point Q extends in the vertical direction.

[0008] Furthermore, multiple first air guiding structures are arranged at intervals on the side plate, and in the vertical direction, adjacent first air guiding structures are at least partially staggered; and / or the first air guiding structures are arranged in a teardrop shape.

[0009] Furthermore, a second air guide structure is provided on the surface of the rear plate facing the indoor heat exchanger. The second air guide structure is a strip-shaped structure extending in the left-right direction. The cross-section of the second air guide structure on the vertical plane is triangular, and the tip of the second air guide structure faces the indoor heat exchanger.

[0010] Furthermore, both side plates are triangular structures. The first side of the triangular structure extending horizontally is attached to the volute, the second side of the triangular structure extending vertically is attached to the rear plate, and the third side of the triangular structure is used to attach to the indoor heat exchanger. The angle between the third side and the second side is α, which is equal to the angle of inclination between the indoor heat exchanger and the vertical plane when it is placed. Preferably, the triangular structure is a right triangle, the third side is the hypotenuse, the second side and the first side are both right-angled sides, and the length of the second side is greater than the length of the first side.

[0011] Furthermore, the distance between the opposing surfaces of the two side plates is D, where D is equal to the expansion dimension of the heat exchange fins of the indoor heat exchanger.

[0012] Furthermore, the volute is integrally formed with the two side plates; or the volute is integrally formed with the guide section; or the volute and the guide section are separate components.

[0013] Furthermore, the side plate has a groove on the surface that is used to fit with the indoor heat exchanger. The groove sidewall is used to fit with the side plate of the indoor heat exchanger, and the groove bottomwall is used to fit with the folded edge of the side plate of the indoor heat exchanger.

[0014] Furthermore, the volute and the flow guide are separately configured; the side plate also includes: a first folded edge connected to the second side, the first folded edge being used for welding to the rear plate; a second folded edge connected to the third side, the first folded edge being used for connecting to the side plate of the indoor heat exchanger; and a third folded edge connected to the first side, the third folded edge being used for overlapping with the air outlet end face of the volute.

[0015] According to another aspect of the present invention, an air conditioning unit is provided, including the above-described air duct system.

[0016] By applying the technical solution of this invention, the baffle plate is eliminated. The volute, the guide section, and the indoor heat exchanger form an air supply cavity. The airflow that flows out through the air outlet of the volute is guided by the guide section and flows entirely into the indoor heat exchanger through the air supply cavity. This avoids the baffle plate blocking the air and causing airflow loss, thereby improving the heat exchange efficiency of the indoor heat exchanger. Attached Figure Description

[0017] Figure 1 A schematic diagram of the assembly structure of an air conditioner cabinet unit in the related art is shown;

[0018] Figure 2 It shows Figure 1A schematic diagram of the assembly structure of the evaporator, volute, and baffle plate of a cabinet air conditioner.

[0019] Figure 3 It shows Figure 2 Another structural diagram from a different angle;

[0020] Figure 4 A schematic diagram of the assembly structure of the air duct system and evaporator according to an optional embodiment of the present invention is shown;

[0021] Figure 5 It shows Figure 4 A schematic diagram of the three-dimensional structure;

[0022] Figure 6 It shows Figure 5 Another structural diagram from a different angle;

[0023] Figure 7 It shows Figure 6 Enlarged view of point A in the middle;

[0024] Figure 8 A schematic diagram of the air duct system according to an optional embodiment of the present invention is shown, wherein the volute and the two side plates are integrally formed;

[0025] Figure 9 It shows Figure 8 Sectional view at point AA;

[0026] Figure 10 It shows Figure 9 Enlarged view of point B in the middle;

[0027] Figure 11 It shows Figure 8 Rear view;

[0028] Figure 12 It shows Figure 8 A schematic diagram of the three-dimensional structure;

[0029] Figure 13 A schematic diagram of a duct structure according to another optional embodiment of the present invention is shown, wherein the volute and the guide section are integrally formed;

[0030] Figure 14 A schematic diagram of the assembly structure of the air duct system and evaporator according to another alternative embodiment of the present invention is shown, wherein the volute and the flow guide are separately arranged;

[0031] Figure 15 It shows Figure 14 A schematic diagram of the assembly structure of the air duct system and water receiving tray assembly;

[0032] Figure 16 It shows Figure 14A schematic diagram of the assembly structure of the air duct system, water baffle assembly and water receiving tray assembly;

[0033] Figure 17 It shows Figure 14 A schematic diagram of the airflow guide section of the air duct system in the middle;

[0034] Figure 18 It shows Figure 17 The main view;

[0035] Figure 19 It shows Figure 17 The left view.

[0036] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0037] In the attached diagram:

[0038] 10. Volute; 11. Air outlet; 20. Air guide; 21. Rear plate; 210. Second air guide structure; 22. Side plate; 2. Groove; 221. First side; 222. Second side; 223. Third side; 224. First folded edge; 225. Second folded edge; 226. Third folded edge; 220. First air guide structure; 1. Centerline; 100. Indoor heat exchanger; 101. Side plate; 102. Side plate folded edge; 200. Water baffle assembly; 300. Water tray assembly. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0040] In order to solve the technical problem of air volume loss caused by setting baffles on both sides of the evaporator in related technologies, the present invention provides an air duct system and an air conditioning unit having the same.

[0041] like Figures 1 to 3As shown, air conditioning cabinet units in related technologies generally consist of an evaporator, piping, electrical components, a motor, fan blades, a volute assembly, and a casing. In square cabinet units, the evaporator is often a straight-plate parallel-flow evaporator, placed at an angle at the top of the unit. The volute assembly is located at the bottom, and the motor and centrifugal fan blades are housed inside the volute. The volute, motor, and fan blades together form the air delivery system. When the air conditioner is running, the motor drives the fan blades, generating airflow from bottom to top. After heat exchange in the evaporator, the desired cool or warm air is blown out. The evaporator is placed at an angle, with its upper part secured to the rear panel of the casing via an upper evaporator plate, and its bottom connected to a drip tray assembly via a baffle plate. The volute is placed at the bottom of the evaporator, and the motor and centrifugal fan are located inside the volute. Two baffles are located on the left and right sides, respectively, and are fixed to the left and right side plates of the evaporator. When the indoor unit is running, the centrifugal fan draws in air from below and blows it upwards. The air in the middle flows to the evaporator for heat exchange. The air on the left and right sides is blocked by the two baffles. Some of the air flows upwards, some flows to the middle, and some is lost due to the rebound of the baffles. In the current design, the air on the left and right sides does not flow to the middle heat exchange surface immediately, resulting in airflow loss, reduced air pressure, and decreased heat exchange efficiency. Furthermore, the airflow direction is not perpendicular to the evaporator heat exchange surface, but forms a certain acute angle α, which prevents the air from contacting the heat exchange fins most efficiently, affecting part of the heat exchange efficiency.

[0042] like Figures 4 to 19 As shown, this application provides an air duct system, including: a volute 10 having an upward-facing air outlet 11; a guide section 20 including a rear plate 21 and two side plates 22, the two side plates 22 being disposed opposite each other on the left and right sides of the air outlet 11, the rear plate 21 being disposed on the rear side of the air outlet 11 and sealingly connected to the two side plates; and an indoor heat exchanger 100 overlapping between the two guide sections with its windward heat exchange surface facing the rear plate. The indoor heat exchanger 100, the volute 10, and the guide section 20 together form an air supply cavity. The airflow flowing out through the air outlet 11 of the volute 10 is guided by the guide section 20 and flows entirely into the indoor heat exchanger 100 through the air supply cavity.

[0043] In this way, the baffle plate is eliminated in this application. The volute 10, the guide section 20 and the indoor heat exchanger 100 form an air supply cavity. The airflow flowing out through the air outlet 11 of the volute 10 flows entirely into the indoor heat exchanger 100 through the air supply cavity under the guidance of the guide section 20, avoiding the loss of airflow caused by the baffle plate blocking the air, thereby improving the heat exchange efficiency of the indoor heat exchanger 100.

[0044] Optionally, such as Figures 4 to 13As shown, a first air guide structure 220 is provided on the opposing surfaces of the two side plates 22. The first air guide structure 220 forms a tip with a gradually decreasing width, and the tip of the first air guide structure 220 is positioned towards the indoor heat exchanger 100. In this way, the first air guide structure 220 drives the airflow in the air supply cavity to the heat exchange surface of the indoor heat exchanger 100, further improving the heat exchange efficiency of the indoor heat exchanger 100.

[0045] like Figure 9 and Figure 10 As shown, the first air guiding structure 220 has an arc-shaped centerline 1, with an endpoint P near the tip and an endpoint Q away from the tip. The tangent of the centerline 1 passing through endpoint P is perpendicular to the heat exchange surface of the indoor heat exchanger 100, and the tangent of the centerline 1 passing through endpoint Q extends vertically. In this way, the first air guiding structure 220 drives the airflow in the air supply cavity to flow vertically towards the heat exchange surface of the indoor heat exchanger 100, further improving the heat exchange efficiency of the indoor heat exchanger 100.

[0046] like Figure 9 and Figure 10 As shown, multiple first air guiding structures 220 are spaced apart on the side plate 22, with adjacent first air guiding structures 220 being at least partially staggered in the vertical direction. This geometrically staggered distribution of the multiple first air guiding structures 220 allows airflow to interweave, ensuring that the top first air guiding structure 220 also guides the airflow. Simultaneously, the multiple first air guiding structures 220 also act as air cutters, thus contributing to noise reduction in the duct system.

[0047] like Figure 9 and Figure 10 As shown, the first air guiding structure 220 is arranged in a teardrop shape. In this way, the shape of the teardrop is streamlined, which helps to make the airflow smoother.

[0048] like Figure 13 As shown, a second air guide structure 210 is provided on the surface of the rear plate 21 facing the indoor heat exchanger 100. The second air guide structure 210 is a strip-shaped structure extending in the left-right direction, and its cross-section in the vertical plane is triangular. The tip of the second air guide structure 210 faces the indoor heat exchanger 100. In this way, the second air guide structure 210 guides the air on the back side to flow vertically towards the evaporator heat exchange surface, further improving the heat exchange efficiency of the indoor heat exchanger 100.

[0049] Optionally, the second air guiding structure 210 is a strip structure extending in the horizontal direction.

[0050] Optionally, such as Figure 13 As shown, multiple second air guiding structures 210 are arranged at intervals along the vertical direction on the rear plate 21. The air guiding effect is better when multiple second air guiding structures 210 are provided.

[0051] Optionally, both side plates 22 are triangular structures. The first side 221 of the triangular structure extending horizontally is attached to the volute portion 10, the second side 222 of the triangular structure extending vertically is attached to the rear plate 21, and the third side 223 of the triangular structure is used to attach to the indoor heat exchanger 100. The included angle between the third side 223 and the second side 222 is α, which is equal to the tilt angle between the indoor heat exchanger 100 and the vertical plane when it is placed.

[0052] Preferably, the triangle structure is a right triangle, with the third side 223 being the hypotenuse, the second side 222 and the first side 221 both being right sides, and the length of the second side 222 being greater than the length of the first side 221.

[0053] like Figure 9 As shown, the opposing surfaces of the two side plates 22 are arranged in a right-angled triangle. The first side 221 of the right-angled triangle, extending horizontally, is attached to the volute portion 10. The second side 222 of the right-angled triangle, extending vertically, is attached to the rear plate 21. The third side 223 of the right-angled triangle is used to attach to the indoor heat exchanger 100. The angle between the third side 223 and the second side 222 is α, which is equal to the angle of inclination between the indoor heat exchanger 100 and the vertical plane when it is placed. Thus, during assembly, the indoor heat exchanger 100 is attached to the surface where the third side 223 of the two side plates 22 is located. After assembly, the indoor heat exchanger 100, the volute portion 10, and the guide portion 20 form a closed air supply cavity.

[0054] like Figure 9 and Figure 10 As shown, the first air guide structure 220 is arranged in a teardrop shape, with its tip facing the third side 223. The angle between the tangent of the center line 1 at endpoint P and the third side 223 is 90°, and the angle between the tangent of the center line 1 at endpoint Q and the first side 221 is also 90°. This ensures that the airflow is directed vertically to the heat exchange surface of the indoor heat exchanger 100 under the guidance of the first air guide structure 220.

[0055] Optionally, the indoor heat exchanger 100 is an evaporator.

[0056] Optionally, such as Figure 8 and Figure 18 As shown, the distance between the opposing surfaces of the two side plates 22 is D, which is equal to the expansion dimension of the heat exchange fins of the indoor heat exchanger 100. By limiting the above dimensions, it is beneficial to form a closed air supply cavity with the indoor heat exchanger 100, the volute 10, and the guide section 20 after assembly.

[0057] Optionally, the volute 10 is integrally formed with the two side plates 22; or the volute 10 is integrally formed with the guide section 20; or the volute 10 and the guide section 20 are separate. In this way, by forming an integral part, the number of parts is reduced, thereby improving assembly efficiency.

[0058] Optionally, such as Figure 6 and Figure 7 As shown, the side plate 22 has a groove 2 on its surface for contacting the indoor heat exchanger 100. The side wall of the groove 2 is for contacting the side plate 101 of the indoor heat exchanger 100, and the bottom wall of the groove 2 is for contacting the folded edge 102 of the side plate of the indoor heat exchanger 100. In this way, the groove 2 cooperates with the side plate 101 and the folded edge 102 of the indoor heat exchanger 100, which is beneficial to the sealing between the two.

[0059] Optionally, such as Figures 14 to 19 As shown, the volute section 10 and the flow guide section 20 are separately disposed; the side plate 22 further includes: a first folded edge 224 connected to the second side 222, the first folded edge 224 being used for welding to the rear plate 21; a second folded edge 225 connected to the third side 223, the first folded edge 224 being used for connecting to the side plate of the indoor heat exchanger 100; and a third folded edge 226 connected to the first side 221, the third folded edge 226 being used for overlapping with the air outlet end face where the air outlet 11 of the volute section 10 is located. In this way, the rear plate 21 and the side plate 22 of the flow guide section 20 are first assembled as one unit, then the volute section 10 and the flow guide section 20 are assembled together, and finally the indoor heat exchanger 100, the volute section 10, and the flow guide section 20 are assembled together. The volute 10 and the guide section 20 together form a closed air supply duct. When the indoor heat exchanger 100 is assembled with the air supply duct, the volute 10, the guide section 20 and the indoor heat exchanger 100 form a closed air supply cavity. The airflow flowing out through the air outlet 11 of the volute 10 flows to the indoor heat exchanger 100 through the air supply cavity under the guidance of the guide section 20.

[0060] This application also provides an air conditioning unit, including the air duct system described above and below. The air conditioning unit provided by this application has low cost, high heat exchange efficiency, and good performance.

[0061] exist Figure 12In the optional embodiment shown, the volute 10 is integrally formed with the two side plates 22 to create a new volute structure. The rear plate 21 is integrally formed with the housing and serves as the rear plate of the housing. During assembly, the new volute structure is first installed on the rear plate of the housing and secured with screws. Then, the evaporator components are placed at an angle, with the groove serving as a stop groove. The left and right side plates of the evaporator are folded and fitted into the groove of the new volute structure for a stop fit, eliminating the need for a baffle plate, reducing parts, and improving efficiency. The two side plates 22 form a left and right baffle surface, which are triangular and perpendicular to the heat exchange surface of the evaporator. The end angle of the new volute structure is set to α, where α equals the angle of inclination of the evaporator relative to the vertical plane. During assembly, the left and right side plates of the evaporator can fit well against the baffle surface of the volute after the evaporator is tilted. The width of the volute outlet frame is set to D, where D equals the expansion height of the evaporator heat exchange fins. A teardrop-shaped first air guide structure 220 is provided on the left and right baffle surfaces of the volute, with the teardrop shape being streamlined. The water droplets are oriented in an arc, with the tail end tangent vertically, serving as the air inlet and guiding the air upwards. The tip tangent is perpendicular to the evaporator heat exchange surface, serving as the air outlet. This orientation helps guide the air vertically towards the evaporator heat exchange surface, improving heat exchange efficiency. Multiple first air guide structures 220 are geometrically arranged in a staggered pattern, with interlaced airflow directions, ensuring that the top first air guide structure 220 also guides the airflow. These multiple first air guide structures 220 cut through the air, serving as a noise reduction mechanism for the duct system. After installation, the duct system and the evaporator heat exchange fins form a closed cavity structure. During cabinet operation, also within the volute, centrifugal fan blades draw in air from below and blow it upwards, with the air outlet faces all located on the evaporator heat exchange fins. With no baffles on the left and right sides of the air duct system, all air can flow to the middle fins of the evaporator for heat exchange, resulting in higher air supply pressure than the original design. The first air guide structure 220 on the volute guides the airflow vertically to the heat exchange surface of the evaporator, resulting in higher air volume utilization and improved heat exchange effect.

[0062] exist Figure 13 In the optional embodiment shown, a connecting structure is provided on the back of the volute, and the rear plate 21, two side plates 22 are integrally formed with the volute part 10 to form a new volute structure. The rear plate 21 of the new volute structure is connected to the left and right windproof surfaces of the volute. A second air guide structure 210 can be provided on the rear plate 21. The second air guide structure 210 is triangular in shape and can guide the air on the back to flow vertically to the heat exchange surface of the evaporator, thereby improving the heat exchange efficiency.

[0063] Optionally, in Figure 12 or Figure 13 In one embodiment, a stop groove is provided on the mating surface of the new volute structure and the evaporator side plate. The bottom of the stop groove of the volute is mated with the folded edge of the evaporator side plate, and the side of the stop groove is mated with the surface of the evaporator side plate. This feature is used to improve the sealing performance of the volute and the evaporator components and prevent air leakage.

[0064] In this application Figure 12 or Figure 13 In a specific embodiment, the volute portion 10 and the air guide portion 20 are integrally formed to create a novel volute. The novel volute provided in this application has a first air guide structure 220, which drives the air inside the air duct system to flow vertically towards the evaporator surface, improving heat exchange efficiency. Furthermore, the first air guide structure 220 is geometrically arrayed, cutting through the air and reducing noise in the air duct system. The novel volute fits with the evaporator side plate at a stop, and a baffle groove is provided on the volute to fit with the folded edge stop of the evaporator side plate, effectively improving the airtightness of the air duct system.

[0065] This application Figures 14 to 19 In the illustrated embodiment, the volute 10 and the air guide 20 are separately arranged. Two side plates 22 are respectively provided on the left and right sides of the air outlet 11 of the volute 10. The two side plates 22 and the rear plate 21 form a new rear plate assembly. The two side plates 22 are triangular in shape, and the angle of the triangle is set to a value α, which is equal to the tilt angle of the evaporator relative to the vertical plane when it is placed. The two side plates 22 are used to guide the airflow flowing outward from the air outlet 11 of the volute 10. The two side plates 22 are provided with a first folded edge 224, a second folded edge 225, and a third folded edge 226. The width of each folded edge is set to be greater than or equal to 9 mm and less than or equal to 15 mm. The first folded edge 224 is spot-welded to the rear plate 21 to form the rear plate assembly. The distance between the two side plates 22 is set to a value D, where D is equal to the expansion dimension of the evaporator heat exchange fins. The platforms on both sides of the air outlet end face of the volute 10 rest on the third folded edge 226 of the two side plates 22. The rear plate 21, the two side plates 22, and the volute 10 together form a closed air supply system. During evaporator assembly, it is placed at an angle on the upper part of the air conditioner, and the left and right side plates of the evaporator are fastened to the second folded edge 225 of the two side plates 22. The upper part is fastened to the rear plate of the casing through the upper side plate of the evaporator, and the bottom is connected to the water receiving tray assembly 300 through the baffle assembly 200. After the evaporator is placed, it forms a closed cavity structure with the air supply system. In this way, the baffle is eliminated, and only the two side plates 22 need to be installed on the rear plate 21, which reduces air backflow. The air flows evenly to the heat exchange fins in the middle of the evaporator, resulting in high air volume utilization and improved heat exchange effect.

[0066] This application uses the volute 10 and the guide section 20 to form an integral internal cavity structure with the evaporator components, eliminating the need for left and right baffles, reducing parts and increasing efficiency. The air is delivered from the volute outlet and flows to the heat exchange surface in the middle of the evaporator, avoiding the flow to the left and right baffle positions, reducing backflow losses and increasing the air supply pressure. At the same time, the volute is provided with air guide structure features to guide the airflow vertically to the heat exchange surface of the evaporator, improving heat exchange efficiency.

[0067] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

[0068] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0070] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0071] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0072] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A duct system, characterized in that, include: The volute (10) has an upward-facing air outlet (11). The airflow guide (20) includes a rear plate (21) and two side plates (22). The two side plates (22) are arranged opposite to each other on the left and right sides of the air outlet (11). The rear plate (21) is arranged on the rear side of the air outlet (11) and is sealed to the two side plates. The indoor heat exchanger (100) is connected between the two side plates (22) and its windward heat exchange surface faces the rear plate. The indoor heat exchanger (100), the volute (10) and the guide section (20) together form an air supply cavity. The airflow that flows out through the air outlet (11) of the volute (10) flows through the air supply cavity to the indoor heat exchanger (100) under the guidance of the guide section (20). A first air guide structure (220) is provided on the opposing surfaces of the two side plates (22), the first air guide structure (220) forming a tip with a gradually decreasing width, the tip of the first air guide structure (220) being positioned toward the indoor heat exchanger (100).

2. The air duct system according to claim 1, characterized in that, The first air guide structure (220) is teardrop-shaped.

3. The air duct system according to claim 1, characterized in that, The first air guide structure (220) has an arc-shaped centerline (1), the centerline (1) has an end point P near the tip and an end point Q away from the tip, the tangent of the centerline (1) passing through the end point P is perpendicular to the heat exchange surface of the indoor heat exchanger (100), and the tangent of the centerline (1) passing through the end point Q extends in the vertical direction.

4. The air duct system according to claim 1, characterized in that, Multiple first air guide structures (220) are arranged at intervals on the side plate (22), and in the vertical direction, adjacent first air guide structures (220) are at least partially staggered.

5. The air duct system according to claim 1, characterized in that, Both side plates (22) are triangular structures, which are right triangles with a first side, a second side, and a third side; wherein the second side (222) and the first side (221) are both right-angled sides, and the first side (221) extends horizontally and fits against the volute (10), and the second side (222) extends vertically and fits against the rear plate (21); the third side (223) is a hypotenuse and fits against the indoor heat exchanger (100); The angle between the third side (223) and the second side (222) is α, which is equal to the tilt angle between the indoor heat exchanger (100) and the vertical plane when it is placed.

6. The air duct system according to claim 5, characterized in that, The length of the second side (222) is greater than the length of the first side (221).

7. The air duct system according to claim 5, characterized in that, The volute (10) and the flow guide (20) are separately provided; The side plate (22) also includes: A first folded edge (224) connected to the second side (222) is used for welding to the rear plate (21); A second folded edge (225) connected to the third side (223), and the first folded edge (224) used to connect to the side plate of the indoor heat exchanger (100); The third fold (226) is connected to the first side (221), and the third fold (226) is used to overlap with the air outlet (11) of the volute (10).

8. The air duct system according to claim 1, characterized in that, The distance between the opposing surfaces of the two side plates (22) is D, which is equal to the expansion dimension of the heat exchange fins of the indoor heat exchanger (100).

9. The air duct system according to claim 1, characterized in that, The volute (10) is integrally formed with the two side plates (22); or The volute (10) and the guide section (20) are integrally formed; or The volute (10) and the flow guide (20) are separately provided.

10. The air duct system according to claim 1, characterized in that, The side plate (22) has a groove (2) on the surface that is in contact with the indoor heat exchanger (100). The groove sidewall is in contact with the side plate (101) of the indoor heat exchanger (100), and the groove bottom wall is in contact with the folded edge (102) of the side plate of the indoor heat exchanger (100).

11. The air duct system according to any one of claims 1-10, characterized in that, The rear plate (21) has a second air guide structure (210) on the surface facing the indoor heat exchanger (100). The second air guide structure (210) is a strip structure extending in the left and right direction. The cross-section of the second air guide structure (210) on the vertical plane is triangular. The tip of the second air guide structure (210) faces the indoor heat exchanger (100).

12. A cabinet air conditioner, characterized in that, The duct system includes any one of claims 1 to 11.

Images