Air pipe device and integral air conditioner

Abstract

The invention provides an air pipe device and an integral air conditioner, and belongs to the technical field of air conditioners. The air pipe device comprises a pipe body assembly and a flow guide structure. The pipe body assembly is provided with an air inlet end and an air outlet end; the air inlet end is provided with a flow guide structure, the first end of the flow guide structure extends towards the side where the air outlet end is located, and the second end of the flow guide structure extends back to the side where the air outlet end is located. The flow guide structure can divide airflow entering the air inlet end into at least two strands. And / or the air outlet end is provided with a diffusion structure, the first end of the diffusion structure extends towards the side where the air inlet end is located, and the second end of the diffusion structure extends back to the side where the air inlet end is located; at least part of the orthographic projection, in the axial direction of the pipe body assembly, of the first end of the diffusion structure is located within the range of the orthographic projection, in the axial direction of the pipe body assembly, of the air outlet end, and the overflowing section area of the first end of the diffusion structure is smaller than that of the second end of the diffusion structure. The air pipe device is beneficial to improving the mute effect and the heat exchange efficiency of the integral air conditioner.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to an air duct device and an integrated air conditioner. Background Art

[0002] An integrated air conditioner is an air conditioning device that integrates components such as a compressor, a condenser, an evaporator, and a fan. It is usually installed on the wall or window of a building and circulates indoor and outdoor air through pipes to achieve the air conditioning effect. The installation and maintenance of an integrated air conditioner are relatively simple and suitable for small rooms or offices. It can quickly reduce the indoor temperature and has the advantages of energy conservation and quietness, and is a common household air conditioning device.

[0003] To ensure dimensions and aesthetics, the internal air duct structure of the integrated air conditioner is compact. The air flow vertically enters the box body from the outdoor through the air inlet pipe. After the fan does work to make it turn 90°, it passes through the heat exchanger, and then bends 90° and is discharged from the air outlet pipe.

[0004] Large flow separation and pressure pulsation may occur at both the air inlet pipe and the air outlet pipe of the air flow, resulting in relatively large noise and flow resistance, and reducing the quieting effect and heat exchange efficiency of the integrated air conditioner. Summary of the Invention

[0005] This application provides an air duct device and an integrated air conditioner, which can solve the problems of flow separation and pressure pulsation occurring in the air inlet pipe and the air outlet pipe of the integrated air conditioner, resulting in relatively large noise and flow resistance.

[0006] The technical solution is as follows:

[0007] On the one hand, an air duct device is provided, and the air duct device includes: a pipe body assembly and a flow guiding structure;

[0008] The pipe body assembly has an air inlet end and an air outlet end;

[0009] The air inlet end is provided with a flow guiding structure, the first end of the flow guiding structure extends towards the side where the air outlet end is located, and the second end of the flow guiding structure extends away from the side where the air outlet end is located;

[0010] At least a part of the positive projection of the first end of the flow guiding structure along the axial direction of the pipe body assembly is within the range of the positive projection of the air inlet end along the axial direction of the pipe body assembly, and the flow guiding structure can divide the air flow entering the air inlet end into at least two strands;

[0011] And / or,

[0012] The air outlet end is provided with a diffuser structure, the first end of the diffuser structure extends towards the side where the air inlet end is located, and the second end of the diffuser structure extends away from the side where the air inlet end is located;

[0013] At least a part of the positive projection of the first end of the diffuser structure along the axial direction of the pipe body assembly is located within the range of the positive projection of the air outlet end along the axial direction of the pipe body assembly, and the cross-sectional area of the flow passage at the first end of the diffuser structure is smaller than the cross-sectional area of the flow passage at the second end of the diffuser structure.

[0014] In some embodiments, the cross-sectional area of the flow passage at the first end of the guiding structure is smaller than the cross-sectional area of the flow passage at the second end of the guiding structure.

[0015] In some embodiments, the cross-sectional area of the flow passage at the first end of the guiding structure is smaller than the cross-sectional area of the air inlet end.

[0016] In some embodiments, the guiding structure includes at least one guiding vane, and the at least one guiding vane is connected to the pipe body assembly through at least one first connecting rib.

[0017] In some embodiments, the number of the guiding vanes is multiple, and the multiple guiding vanes are arranged at intervals along concentric circles, and the multiple guiding vanes respectively divert and guide the air flow.

[0018] In some embodiments, the extension length of the guiding vane closer to the axis of the pipe body assembly among two adjacent guiding vanes is greater than the extension length of the guiding vane farther from the axis of the pipe body assembly.

[0019] In some embodiments, the diffuser structure includes at least one diffuser vane, and the at least one diffuser vane is connected to the pipe body assembly through at least one second connecting rib.

[0020] In some embodiments, the number of the diffuser vanes is multiple, and the multiple diffuser vanes are arranged at intervals along concentric circles, and the multiple diffuser vanes respectively diffuser and guide the air flow.

[0021] In some embodiments, the extension length of the diffuser vane closer to the axis of the pipe body assembly among two adjacent diffuser vanes is greater than the extension length of the diffuser vane farther from the axis of the pipe body assembly.

[0022] In some embodiments, the pipe body assembly includes an inner pipe body, an outer pipe body and a connecting structure;

[0023] The inner pipe body is located inside the outer pipe body, and the connecting structure is connected between the inner pipe body and the outer pipe body; an inner flow passage is provided in the inner pipe body, an outer flow passage is provided between the inner pipe body and the outer pipe body, and the air flow directions in the inner flow passage and the outer flow passage are the same.

[0024] In some embodiments, each of the guiding vanes in the guiding structure is smoothly connected to the axial end of the inner pipe body or the outer pipe body;

[0025] and / or

[0026] Each diffuser vane in the diffuser structure is smoothly connected to the axial end of the inner tube body or the outer tube body.

[0027] On the other hand, an integrated air conditioner is provided. The integrated air conditioner includes an outdoor unit part, and the outdoor unit part includes a box body, an air inlet duct, an air outlet duct, a heat exchanger, and a fan;

[0028] The air inlet duct and the air outlet duct are respectively communicated with the box body. The heat exchanger and the fan are located inside the box body. At least one of the air inlet duct and the air outlet duct is the duct device of the present application.

[0029] The beneficial effects brought by the technical solution provided by the present application at least include:

[0030] For the duct device of the present application, a flow guiding structure is added at the air inlet end of the pipe body assembly. The orthographic projection of the first end of the flow guiding structure is within the orthographic projection range of the air inlet end. The flow guiding structure can divide the airflow entering the air inlet end into at least two streams, realizing the diversion and rectification of the airflow, so that the airflow entering the air inlet end is more uniform and smooth, reducing the pressure pulsation at the air inlet end of the pipe body assembly, reducing the airflow noise and flow resistance, and further improving the air volume and air inlet efficiency of the duct device, which is beneficial to improving the sound insulation effect and heat exchange efficiency of the integrated air conditioner.

[0031] By adding a diffuser structure at the air outlet end, the high-speed airflow velocity at the air outlet end can be slowed down, and a part of the static pressure can be recovered, thereby reducing the outlet dynamic pressure loss and flow channel loss and increasing the air outlet volume. At the same time, due to the partial covering and blocking effect between the diffuser surfaces and on the air outlet of the air outlet duct, a part of the pneumatic noise in the duct can be reduced from spreading outwards, thereby reducing the overall machine noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 is a schematic structural diagram of the duct device provided by the embodiment of the present application;

[0034] Figure 2 is a structural cross-sectional view of the interface device provided by the embodiment of the present application;

[0035] Figure 3 is a schematic structural diagram of the duct device provided by another embodiment of the present application;

[0036] Figure 4 is a structural cross-sectional view of an air duct device provided by another embodiment of the present application;

[0037] Figure 5 is an axial structural view of a flow guiding structure provided by an embodiment of the present application;

[0038] Figure 6 is a three-dimensional structural view of a flow guiding structure provided by an embodiment of the present application;

[0039] Figure 7 is a three-dimensional structural view of a diffuser structure provided by an embodiment of the present application;

[0040] Figure 8 is a schematic dimension view of an air duct device provided by another embodiment of the present application;

[0041] Figure 9 is a schematic structural view of an integrated air conditioner provided by an embodiment of the present application;

[0042] Figure 10 is a schematic internal structure view of an integrated air conditioner provided by an embodiment of the present application;

[0043] Figure 11 is a schematic structural view of an integrated air conditioner provided by another embodiment of the present application;

[0044] Figure 12 is a schematic internal structure view of an integrated air conditioner provided by another embodiment of the present application.

[0045] The reference numerals in the figures are respectively represented as:

[0046] 1, pipe body assembly;

[0047] 101, air inlet end; 102, air outlet end; 11, inner pipe body; 111, inner flow channel; 12, outer pipe body; 121, outer flow channel; 13, connection structure; 131, third connection rib; 14, fixing structure;

[0048] 2, flow guiding structure;

[0049] 21, flow guiding vane; 211, first flow guiding vane; 212, second flow guiding vane; 213, third flow guiding vane; 214, first flow channel; 215, second flow channel; 216, third flow channel; 22, first connection rib;

[0050] 3, diffuser structure;

[0051] 31. Diffuser; 311. First diffuser; 312. Second diffuser; 313. Third diffuser; 314. First diffuser flow channel; 315. Second diffuser flow channel; 316. Third diffuser flow channel; 32. Second connecting rib

[0052] 4. Cabinet

[0053] 5. Air inlet pipe

[0054] 6. Air outlet pipe

[0055] 7. Heat exchanger

[0056] 8. Fan

[0057] 001. Axis of the pipe body assembly Detailed implementation mode

[0058] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are merely examples of the devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0059] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0060] It should be understood that in this application, "electrically connected" can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical conductors such as copper foils or wires of a Printed Circuit Board (PCB) that can transmit electrical signals. "Communication connection" can refer to the transmission of electrical signals, including wireless communication connections and wired communication connections. Wireless communication connections do not require a physical medium and do not belong to the connection relationship that defines the product structure. "Connected" and "linked" can both refer to a mechanical connection relationship or a physical connection relationship, that is, A is connected to B or A is linked to B can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or A and B are in contact with each other and it is difficult to separate A and B.

[0061] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those of ordinary skill in the art.

[0062] In the related art, an integrated air conditioner usually has an air inlet duct and an air outlet duct. Both the air inlet duct and the air outlet duct are straight circular pipes with the same diameter. The straight circular pipes are directly connected to the box body, and the velocity gradient is very large near the corner position of the connection. The air flow flows through the air inlet duct and does work through the fan to make it turn 90°, then flows through the heat exchanger for heat exchange, then converges in the corner area of the box body, and then flows out from the air outlet duct. Here, the flow needs to experience a 90° turn. The exhaust smoothness of the air outlet duct directly affects the heat exchange efficiency.

[0063] At the air flow corner position and the corner area of the box body, large flow separation and pressure pulsation will occur in the air flow, generating large noise and flow resistance inside the box body. Usually, the integrated air conditioner is installed indoors, and the noise problem will seriously affect the user experience of the product. In addition, eddy currents will be generated in the corners and corner areas of the air flow, blocking the air flow channel, reducing the effective flow area, resulting in insufficient heat exchange air volume in the system and low heat exchange efficiency.

[0064] Therefore, this application provides an air duct device. A flow guiding structure is added to the air inlet end of the pipe body assembly, which can divide the air flow entering the air inlet end into at least two streams, realizing the diversion and rectification of the air flow, so that the air flow entering the air inlet end is more uniform and smooth, reducing the pressure pulsation at the air inlet end of the pipe body assembly, reducing the air flow noise and flow resistance, and further improving the air volume and air inlet efficiency of the air duct device, which is beneficial to improving the sound insulation effect and heat exchange efficiency of the integrated air conditioner.

[0065] To make the purpose, technical solutions, and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0066] On the one hand, in combination with Figures 1 to 4As shown in the figure, an embodiment of the present application provides an air duct device, which includes a pipe body assembly 1 and a flow guiding structure 2.

[0067] The pipe body assembly 1 has an air inlet end 101 and an air outlet end 102; the air inlet end 101 is provided with a flow guiding structure 2, the first end of the flow guiding structure 2 extends towards the side where the air outlet end 102 is located, and the second end of the flow guiding structure 2 extends away from the side where the air outlet end 102 is located; at least a part of the orthographic projection of the first end of the flow guiding structure 2 along the axial direction of the pipe body assembly 1 is within the orthographic projection range of the air inlet end 101 along the axial direction of the pipe body assembly 1, and the flow guiding structure 2 can divide the airflow entering the air inlet end 101 into at least two streams.

[0068] In the air duct device of this embodiment, a flow guiding structure 2 is added to the air inlet end 101 of the pipe body assembly 1. The orthographic projection of the first end of the flow guiding structure 2 is within the orthographic projection range of the air inlet end 101. The flow guiding structure 2 can divide the airflow entering the air inlet end 101 into at least two streams, realizing the diversion and rectification of the airflow, so that the airflow entering the air inlet end 101 is more uniform and smooth, reducing the pressure pulsation at the air inlet end 101 of the pipe body assembly 1, reducing the airflow noise and flow resistance, and further improving the air volume and air inlet efficiency of the air duct device, which is beneficial to improving the sound insulation effect and heat exchange efficiency of the integral air conditioner.

[0069] In the related art, the air inlet duct 5 or the air outlet duct 6 mostly adopts a single-layer straight round pipe. During the process of entering the pipe, the airflow will be sucked into the pipe from the edge of the inlet. The flow velocity in the center of the pipe is high, and the flow velocity near the pipe wall is low. Usually, the pressure gradient at the edge of the round pipe inlet is large, which will cause flow separation in the pipe. If the flow velocity is too fast, the air inlet duct 5 is prone to blockage and the resistance increases sharply.

[0070] In this embodiment, by adding a flow guiding structure 2 to the air inlet end 101 of the pipe body assembly 1 to divert the airflow, the flow velocity gradient of the airflow in the center of the pipe and near the pipe wall is reduced, and then the pressure gradient at the air inlet end 101 of the pipe body assembly 1 is reduced to suppress the generation of vortices in the pipe, achieving the effect of reducing the air inlet or air outlet noise.

[0071] In some possible implementation manners, referring to Figure 8 、 10 As shown, when the air duct device is used as the air inlet duct 5, the air inlet end 101 faces the outside, and the air outlet end 102 is connected to the box body 4 of the integral air conditioner; when the air duct device is used as the air outlet duct 6, the air inlet end 101 is connected to the box body 4 of the integral air conditioner, and the air outlet end 102 faces the outside.

[0072] In some possible implementation manners, the pipe body assembly 1 is made of hard anti-corrosion plastic, which is simple to install and can be directly embedded in the wall or directly installed on the wall hole, and at the same time plays the role of gas diversion and fixing the box body 4.

[0073] Exemplarily, referring to Figure 1 , 3 and Figure 9 , 11 as shown, a fixing structure 14 is provided at the air inlet end 101 or the air outlet end 102 of the pipe body assembly 1. By using this fixing structure 14, the air duct device can be fixedly connected to the box body 4 of the integrated air conditioner. Optionally, the fixing structure 14 is a flange structure. Alternatively, the air duct device can be fixedly connected to the box body 4 by welding through the fixing structure 14 or by using bolts and nuts.

[0074] In some other possible implementation manners, the length of the pipe body assembly 1 can be selected according to the thickness of the wall, usually the thickness of the wall where the integrated air conditioner needs to be installed.

[0075] Combined with Figure 3 , Figure 4 , Figure 7 and Figure 8 as shown, an embodiment of the present application provides an air duct device, which includes: a pipe body assembly 1 and a flow guiding structure 2.

[0076] The pipe body assembly 1 has an air inlet end 101 and an air outlet end 102; a diffuser structure 3 is provided at the air outlet end 102. The first end of the diffuser structure 3 extends toward the side where the air inlet end 101 is located, and the second end of the diffuser structure 3 extends away from the side where the air inlet end 101 is located.

[0077] At least a part of the orthographic projection of the first end of the diffuser structure 3 along the axial direction of the pipe body assembly 1 is within the orthographic projection range of the air outlet end 102 along the axial direction of the pipe body assembly 1, and the cross-sectional area of the flow passage of the first end of the diffuser structure 3 is smaller than the cross-sectional area of the flow passage of the second end of the diffuser structure 3.

[0078] Since the air outlet pipe 6 in the integrated air conditioner is directly connected to the outside atmosphere, after the air flow flows out from the air outlet pipe 6, the flow passage area suddenly expands, and the kinetic energy of the gas is all dissipated, resulting in a large flow loss. In view of this, the air duct device of this embodiment is provided with a diffuser structure 3 at the air outlet end 102, which can slow down the high-speed air flow speed at the air outlet end 102, recover a part of the static pressure, thereby reducing the outlet dynamic pressure loss and the flow passage loss, and increasing the air outlet volume. At the same time, due to the covering and blocking effect between the diffuser surfaces and on a part of the outlet of the air outlet pipe 6, a part of the pneumatic noise in the air duct can be reduced from spreading outwards, thereby reducing the overall machine noise.

[0079] It should be noted that although the accompanying drawings of the specification provided in this application do not give specific examples of the duct device using the flow guiding structure 2 and the diffuser structure 3 at the same time, those skilled in the art can, on the basis of fully understanding the technical solution of this application, think of arranging the flow guiding structure 2 and the diffuser structure 3 at the air inlet end 101 and the air outlet end 102 of the pipe body assembly 1 respectively, so as to achieve the technical purpose of improving the air inlet effect and the air outlet effect of the duct device at the same time.

[0080] Combined with Figure 2 、 Figures 4 to 6 As shown, in some embodiments, the cross-sectional area of the flow-through section at the first end of the flow guiding structure 2 is smaller than the cross-sectional area of the flow-through section at the second end of the flow guiding structure 2.

[0081] Through the above arrangement, the flow guiding structure 2 is more in line with aerodynamics. The cross-sectional area of the flow-through section at the second end of the flow guiding structure 2 is enlarged, so that the aerodynamic layout at the air inlet end 101 of the duct device is better. The cross-sectional area of the flow-through section at the first end of the flow guiding structure 2 is smaller, so that the flow guiding structure 2 has a good rectifying effect.

[0082] Combined with Figure 2 、 Figures 4 to 6 As shown, in some embodiments, the cross-sectional area of the flow-through section at the first end of the flow guiding structure 2 is smaller than the cross-sectional area of the flow-through section at the air inlet end 101.

[0083] Through the above arrangement, the flow guiding structure 2 is more in line with aerodynamics. The flow guiding structure 2 has a good rectifying effect, so that the air flow can be gradually contracted and transitioned into the pipe body assembly 1, which is beneficial to reducing the noise at the air inlet end 101 and improving the air inlet efficiency of the duct device.

[0084] In some possible implementation manners, referring to Figure 1 、 2 As shown, the flow guiding structure 2 divides the air inlet end 101 into two air flow channels, including a circular channel coaxial with the pipe body assembly 1 and an annular channel coaxial with the pipe body assembly 1. The air flow enters the pipe body assembly 1 along the circular channel and the annular channel respectively, so as to achieve the purpose of shunting and rectifying the air flow in the pipe body assembly 1.

[0085] Combined with Figure 5 and Figure 6 As shown, in some embodiments, the flow guiding structure 2 includes at least one flow guiding vane 21, and at least one flow guiding vane 21 is connected to the pipe body assembly 1 through at least one first connecting rib 22.

[0086] The flow guiding structure 2 of this embodiment is designed as a flow guiding piece 21, and the flow guiding piece 21 is arranged at the air inlet end 101 of the pipe body assembly 1. By using its own blocking and guiding effects on the air flow, the flow guiding function is realized. A single flow guiding piece 21 can divide the air flow into two strands. By reasonably designing the shape of the flow guiding piece 21, various different-shaped channels can be separated at the air inlet end 101 of the pipe body assembly 1.

[0087] Exemplarily, if the flow guiding piece 21 is a straight plate member, the air inlet end 101 can be separated into two semi-circular channels. Another exemplarily, if the flow guiding piece 21 is an annular member, the air inlet end 101 can be separated into a circular channel and an annular channel (as Figure 1 shown). Still another exemplarily, if the flow guiding piece 21 is an arc-shaped plate member, the air inlet end 101 can be separated into a quasi-circular channel and a crescent-shaped channel. The above-listed and the flow guiding pieces 21 shown in the accompanying drawings of the specification are only partial examples, and the application does not overly limit the number and shape of the flow guiding pieces 21.

[0088] In some possible implementation manners, the shape of the first connecting rib 22 can be slender or sheet-like, with little influence on the air flow, and adjacent first connecting ribs 22 are arranged at intervals. Optionally, the first connecting rib 22 is arranged at the air inlet end 101 of the pipe body assembly 1. The number of the first connecting ribs 22 can be 2 - 20, and they are arranged uniformly or non-uniformly along the circumferential direction.

[0089] Combined with Figure 5 and Figure 6 shown, in some embodiments, the number of the flow guiding pieces 21 is multiple, and the multiple flow guiding pieces 21 are arranged at intervals along concentric circles, and the multiple flow guiding pieces 21 respectively perform flow splitting and guiding on the air flow.

[0090] Through the above arrangement, the multiple flow guiding pieces 21 are arranged at intervals along concentric circles, so that the air inlet end 101 can be separated into multiple air inlet channels distributed in concentric circles, further improving the uniform rectifying effect of the flow guiding structure 2 on the air flow, making the air inlet of the air duct device smoother, and achieving the technical purposes of reducing the air inlet noise and improving the air inlet efficiency.

[0091] Combined with Figure 3 、 Figure 4 and Figure 8 shown, in some embodiments, the extension length of the flow guiding piece 21 closer to the axis 001 of the pipe body assembly 1 among two adjacent flow guiding pieces 21 is greater than the extension length of the flow guiding piece 21 farther from the axis 001 of the pipe body assembly 1.

[0092] With the above arrangement, the guiding vane 21 closer to the axis 001 of the pipe body assembly 1 has a greater axial extension length, so that the air volume at the axis 001 of the pipe body assembly 1 increases, increasing the air pressure at the center of the pipe body assembly 1, making the pressure at the center and near the pipe wall of the pipe body assembly 1 tend to be balanced, and the pressure gradient at the air inlet end 101 of the pipe body assembly 1 is small, thus effectively reducing the air inlet resistance and air inlet noise at the air inlet end 101 of the pipe body assembly 1.

[0093] In some possible implementation manners, the number of the guiding vanes 21 is three, namely a first guiding vane 211, a second guiding vane 212 and a third guiding vane 213. Among them, the first guiding vane 211 is at the largest distance from the axis 001 of the pipe body assembly 1, the second guiding vane 212 is at the second largest distance from the axis 001 of the pipe body assembly 1, and the third guiding vane 213 is at the smallest distance from the axis 001 of the pipe body assembly 1.

[0094] Optionally, the first guiding vane 211 is connected to the pipe wall of the pipe body assembly 1, the second guiding vane 212 is connected to the inner side of the first guiding vane 211 (i.e., the side close to the axis 001 of the pipe body assembly 1) through a plurality of first connecting ribs 22, and the third guiding vane 213 is connected to the inner side of the second guiding vane 212 through a plurality of first connecting ribs 22. Thus, a first flow channel 214 is formed between the first guiding vane 211 and the second guiding vane 212, a second flow channel 215 is formed between the second guiding vane 212 and the third guiding vane 213, and a third flow channel 216 is formed inside the third guiding vane 213. It should be noted that Figures 3 to 6 and Figure 8 the guiding vane 21 shown in the figure is a non-complete annular structure, but this does not prevent those skilled in the art from thinking that the guiding vane 21 can be designed as a complete annular structure. The guiding vane 21 in the figure is a non-complete annular structure because the air flow flows in a direction perpendicular to the axis 001 of the pipe body assembly 1, and only by arranging the guiding structure 2 in the direction where the air flow blows can the technical purpose of this embodiment be achieved. If the air flow is in other directions, those skilled in the art can think of arranging the guiding structure 2 of this application in the corresponding directions on the premise of fully understanding the technical solution of this application.

[0095] Among them, the third flow channel 216 is still a circular flow channel, while the first flow channel 214 and the second flow channel 215 are annular flow channels. Referring to Figure 8 shown, in some examples, the outlet diameter D21 of the first flow channel 214 is the same as the diameter D of the pipe body assembly 1, and the outlet diameters D22 of the second flow channel 215 and D23 of the third flow channel 216 are required to satisfy 0.5D ≤ D23 ≤ D22 ≤ D21 = D.

[0096] Another example is that the inlet height of the first flow channel 214 in the flow guiding structure 2 (i.e., the extension length of the second flow guiding piece 212 along the axis 001 of the pipe body assembly 1) is H21, and the inlet height of the third flow channel 216 (i.e., the extension length of the second flow guiding piece 212 along the axis 001 of the pipe body assembly 1) is H22, satisfying H21 = H22 = 0.2 - 0.3W, where W is the thickness of the box body 4 of the integrated air conditioner. Defining the inlet heights of the second flow channel 215 and the third flow channel 216 is to prevent the flow guiding structure 2 from being too high. If it exceeds the thickness of the box body 4, dimensional interference will occur, resulting in the inability of the air duct device to be connected to the box body 4.

[0097] Through the three-layer flow guiding structure 2 provided in this embodiment, the air flow in the axial direction perpendicular to the pipe body assembly 1 can be smoothly guided to the air inlet end 101 of the pipe body assembly 1, completing a 90° turn of the air flow, while reducing flow separation and loss.

[0098] In some embodiments, the flow guiding piece 21 is at least one of a horn shape, a conical cylinder shape, and a pyramid cylinder shape. In other embodiments, the cross-section of the flow guiding piece 21 is not limited to profiles such as arcs, straight edges, wavy shapes, sine curves, and crescent shapes. When the flow guiding piece 21 satisfies the above shapes, it has a smooth flow guiding effect, which can further improve the flow guiding effect of the flow guiding structure 2.

[0099] In some possible implementation manners, referring to Figure 5 and Figure 12 As shown, when the air duct device of the present application is used as the air outlet duct 6, since the position of the air outlet duct 6 needs to be close to the corner area of the box body 4 of the integrated air conditioner, the flow guiding structure 2 is designed as a fan shape, with a distribution angle of Φ. The leading edge distribution radius of the flow guiding structure 2 should be more than 10 mm away from the heat exchanger 7. Optionally, the leading edge of each flow guiding surface should be tangent to the incoming air flow direction, the outlet edge should be tangent to the axis of the air outlet duct 6, and a smooth curved surface can be used for transition in the middle. Among them, the value range of the distribution angle Φ is 30° - 120°. Optionally, the value of the distribution angle Φ is 90°.

[0100] Combined with Figure 4 and Figure 7 As shown, in some embodiments, the diffuser structure 3 includes at least one diffuser piece 31, and at least one diffuser piece 31 is connected to the pipe body assembly 1 through at least one second connecting rib 32.

[0101] The diffuser structure 3 of this embodiment is designed as a diffuser piece 31, and the diffuser piece 31 is arranged at the air outlet end 102 of the pipe body assembly 1, and uses its own guiding effect on the air flow to achieve the function of deceleration and pressure increase.

[0102] In some possible implementation manners, the shape of the second connecting rib 32 may be slender or sheet-shaped, with little influence on the air flow, and adjacent second connecting ribs 32 are arranged at intervals. Optionally, the second connecting rib 32 is arranged at the air outlet end 102 of the pipe body assembly 1. The number of the second connecting ribs 32 may be 2 - 20, and they are arranged uniformly or non-uniformly in the circumferential direction.

[0103] Combined with Figure 4 , Figure 7 and Figure 8 As shown, in some embodiments, the number of the diffuser vanes 31 is multiple, and the multiple diffuser vanes 31 are arranged at intervals along concentric circles, and each of the multiple diffuser vanes 31 diffuses and guides the air flow respectively.

[0104] Through the above arrangement, the multiple diffuser vanes 31 are arranged at intervals along concentric circles, so that a plurality of air outlet channels distributed in concentric circles can be separated from the air outlet end 102, further improving the deceleration and pressure increasing effect of the diffusing structure 3 on the air flow, increasing the air output of the air duct device, and achieving the technical purposes of reducing the air outlet noise and improving the air outlet efficiency.

[0105] Combined with Figure 4 and Figure 5 As shown, in some embodiments, the extension length of the diffuser vane 31 closer to the axis 001 of the pipe body assembly 1 among two adjacent diffuser vanes 31 is greater than that of the diffuser vane 31 farther from the axis 001 of the pipe body assembly 1. Through the above arrangement, hierarchical diffusion of the air outlet end 102 can be realized, and the deceleration and pressure increasing effect is better.

[0106] In some embodiments, the diffuser vane 31 is at least one of a horn shape, a conical cylinder shape, and a pyramidal cylinder shape. In other embodiments, the cross-section of the diffuser vane 31 is not limited to curve types such as an arc, a straight edge, a wavy shape, a sine curve, and a crescent shape. When the diffuser vane 31 satisfies the above shapes, the deceleration and diffusion effect is better.

[0107] In some possible implementation manners, the number of the diffuser vanes 31 is three, namely a first diffuser vane 311, a second diffuser vane 312, and a third diffuser vane 313. Among them, the distance between the first diffuser vane 311 and the axis 001 of the pipe body assembly 1 is the largest, the distance between the second diffuser vane 312 and the axis 001 of the pipe body assembly 1 is the second largest, and the distance between the third diffuser vane 313 and the axis 001 of the pipe body assembly 1 is the smallest.

[0108] Optionally, the first diffuser vane 311 is connected to the tube wall of the tube assembly 1, and the second diffuser vane 312 is connected to the inner side of the first diffuser vane 311 (i.e., the side close to the axis 001 of the tube assembly 1) through a plurality of second connecting ribs 32, and the third diffuser vane 313 is connected to the inner side of the second diffuser vane 312 through a plurality of second connecting ribs 32. Thus, a first diffuser flow channel 314 is formed between the first diffuser vane 311 and the second diffuser vane 312, a second diffuser flow channel 315 is formed between the second diffuser vane 312 and the third diffuser vane 313, and a third diffuser flow channel 316 is formed inside the third diffuser vane 313. It should be noted that Figures 3 to 6 and Figure 8 the diffuser vane 31 shown in is a complete annular structure, but this does not prevent those skilled in the art from thinking that the diffuser vane 31 can be designed as an incomplete annular structure.

[0109] Among them, the third diffuser flow channel 316 is a circular expansion flow channel, while the second diffuser flow channel 315 and the first diffuser flow channel 314 are annular expansion flow channels. Exemplarily, the number of diffuser vanes 31 in the diffuser structure 3 is the same as the number of guide vanes 21 in the flow guiding structure 2, and the radial dimensions of the diffuser vane 31 and the guide vane 21 at the corresponding positions are kept equal. The inlet diameter D31 of the first diffuser flow channel 314 in the diffuser structure 3 is consistent with the diameter D of the tube assembly 1, and the inlet diameters D32 of the second diffuser flow channel 315 and D33 of the third diffuser flow channel 316 are also required to satisfy 0.5D ≤ D33 ≤ D32 ≤ D31 = D. The outlet diameters D34 of the first diffuser flow channel 314, D35 of the second diffuser flow channel 315, and D36 of the third diffuser flow channel 316 in the diffuser structure 3 satisfy 0.6D ≤ D36 ≤ D35 ≤ D34 ≤ 2D, and D36 > D33, D35 > D32, D34 > D31, that is, the diameters of the outlet flow channels must be greater than the inlet diameters, so as to form a gradually expanding flow channel.

[0110] In some other possible implementation manners, referring to Figure 8 as shown, the expansion angle of the diffuser flow channel is represented by a, and the expansion angle a can be determined by trigonometric functions, where the expansion angle of the first diffuser flow channel 314 is a1, the expansion angle of the second diffuser flow channel 315 is a2, and the expansion angle of the third diffuser flow channel 316 is a3, satisfying 0° < a1 ≤ 30°, 10° ≤ a2 ≤ 45°, 20° ≤ a3 ≤ 60°.

[0111] Exemplarily, the expansion angle of the diffuser flow channel is determined by the following formula:

[0112]

[0113] where D 出口 represents the outlet diameter of the diffuser flow channel, D 入口Let [[ID=]] denote the inlet diameter of the diffuser channel, and H denote the height of the diffuser channel (i.e., the extension length of the diffuser piece 31 along the axis 001 of the pipe body assembly 1). In this embodiment, the height of the first diffuser channel 314 is H31, the height of the second diffuser channel 315 is H32, and the height of the third diffuser channel 316 is H33, satisfying H33 > H32 > H31. After determining the inlet diameter, outlet diameter, and height of each diffuser channel, the middle surface of the diffuser structure 3 can be connected by a smooth expanding annular surface. The inlet edge of each diffuser surface should be tangent to the axial incoming flow of the air outlet pipe 6.

[0114] Combined with Figure 1 and Figure 2 As shown, in some embodiments, the pipe body assembly 1 includes an inner pipe body 11, an outer pipe body 12, and a connection structure 13; the inner pipe body 11 is located inside the outer pipe body 12, and the connection structure 13 is connected between the inner pipe body 11 and the outer pipe body 12; an inner flow channel 111 is provided inside the inner pipe body 11, and an outer flow channel 121 is provided between the inner pipe body 11 and the outer pipe body 12, and the air flow directions in the inner flow channel 111 and the outer flow channel 121 are the same.

[0115] Through the above arrangement, the inner pipe body 11 and the outer pipe body 12 divide the original single flow channel into inner and outer double flow channels. During the process of air flow being inhaled into the box body 4, the use of inner and outer double pipes can play a role in flow splitting and rectification, and the anti-interference ability in flow instability is enhanced.

[0116] The inner and outer double pipe structure of this embodiment is more effective than the single straight pipe structure in the related art, avoiding a large pressure gradient when the air duct device is used as the air inlet pipe 5, suppressing the generation of vortices in the air duct device to a certain extent, reducing the noise in the outer machine channel, and also reducing the total sound pressure level on the outdoor side.

[0117] Exemplarily, the diameter of the outer pipe body 12 is D, and the diameter range of the inner pipe body 11 is 0.5D - 0.9D.

[0118] In some possible implementation manners, the connection between the outer pipe body 12 and the inner pipe body 11 is fixed by the third connection rib 131. The shape of the third connection rib 131 can be slender or sheet-shaped, and has little influence on the air flow. The number of the third connection ribs 131 can be 2 - 20. The positions of the third connection ribs 131 are mainly near the edges of the air inlet end 101 and the air outlet end 102 of the pipe body assembly 1 and on the side close to the box body 4. Exemplarily, the third connection rib 131 can be combined with the first connection rib 22, or can be combined with the second connection rib 32.

[0119] Combined with Figure 2As shown, in some embodiments, each flow guide piece 21 in the flow guide structure 2 is smoothly connected to the axial end of the inner tube body 11 or the outer tube body 12. Through the above arrangement, each flow guide piece 21 in the flow guide structure 2 can separate the airflow and pour it into the corresponding inner tube body 11 or outer tube body 12, improving the air inlet smoothness of the air duct device.

[0120] Combined with Figure 2 As shown, in some embodiments, each diffuser piece 31 in the diffuser structure 3 is smoothly connected to the axial end of the inner tube body 11 or the outer tube body 12. Through the above arrangement, the airflow discharged from the inner tube body 11 or the outer tube body 12 can be decelerated and diffused respectively through different diffuser pieces 31, which is beneficial to improving the air outlet effect of the air duct device.

[0121] When the air duct device of this embodiment is used as the intake air duct 5, a part of the airflow will bypass the edge of the outer tube body 12 of the tube assembly 1 and enter the outer flow channel 121, and another part of the airflow will enter the inner flow channel 111 along the corresponding flow guide piece 21 of the inner tube body 11. Due to the blockage of the inner tube body 11, the airflow in the outer flow channel 121 achieves a rectifying effect, and the large separation flow at the edge of the pipeline is effectively suppressed, and the airflow after passing through the outer flow channel 121 is more uniform and smooth. After the airflow in the inner flow channel 111 passes through the rectifying action of the flow guide piece 21, it contracts and transitions into the inner flow channel 111. After the airflow passes through the air duct device, it vertically enters the box body 4, and after the fan 8 does work to make it turn 90°, it successively passes through the heat exchanger 7 and the air outlet duct 6. If the air intake is not smooth, surging is likely to occur between the airflow and the fan 8. After adopting the air duct device of this embodiment, the airflow can be made more uniform, the interaction between the airflow and the fan 8 can be avoided from being too strong, the output power of the fan 8 can be reduced, and the occurrence of surging can be suppressed.

[0122] When the air duct device of this embodiment is used as the air outlet duct 6, in the box body 4, most of the airflow after passing through the heat exchanger 7 will turn 90° and be discharged from the box body 4 through the air duct device. When the air duct device is installed on the box body 4 and starts to work, a part of the airflow will enter the outer flow channel 121, and another part of the airflow will enter the inner flow channel 111 along the corresponding flow guide piece 21 of the inner tube body 11. Due to the blockage of the inner tube body 11, the airflow in the outer flow channel 121 achieves a rectifying effect, and the original large separation flow at the edge of the pipeline is effectively suppressed, and the airflow after passing through the outer flow channel 121 is more uniform and smooth. After the airflow in the inner flow channel 111 passes through the rectifying action of the flow guide piece 21, it contracts and transitions into the inner flow channel 111. If the air intake is not smooth, turbulence blockage will occur behind the heat exchanger 7. After adopting the structure of this embodiment, the exhaust can be made more uniform, the airflow passing through the heat exchanger 7 can be taken away in time, and the heat exchange efficiency can be improved; at the same time, it is beneficial to reduce the pressure pulsation inside the box body 4, thereby reducing the indoor noise.

[0123] Compared with the original straight circular pipe as the air inlet pipe 5 or the air outlet pipe 6, in the air duct device of the present application, the diversion structure 2 effectively avoids obvious flow separation at the corner area of the box body 4, the inlet of the air outlet pipe 6 and the inside of the air outlet pipe 6 through the multi-channel diversion and rectification effects, reduces the pressure gradient of each layer, suppresses the generation of vortices in the air outlet scenario to a certain extent, reduces the flow blockage and pipeline resistance in the pipe, thereby greatly increasing the air volume of the inlet and outlet air and reducing the aerodynamic noise radiated outward.

[0124] In the air duct device of the present invention application, the diffuser structure 3 can slow down the high-speed air flow velocity at the outlet of the air duct device and recover a part of the static pressure through the setting of multiple layers of gradually expanding flow channels, thereby reducing the dynamic pressure loss and flow channel loss at the outlet, and increasing the air volume of the air outlet; at the same time, due to the covering and blocking effects between the diffuser surfaces and on a part of the outlet of the air outlet pipe 6, a part of the aerodynamic noise in the air duct can be reduced from spreading outward, thereby reducing the noise of the whole machine.

[0125] The experimental test results show that the air duct device of the present application can increase the air volume by 10% under the same rotational speed, and at the same time, the noise decreases by 1.6 dBA under the same air volume.

[0126] On the other hand, as shown in Figures 9 to 12 This embodiment provides an integrated air conditioner. The integrated air conditioner includes an outdoor unit part. The outdoor unit part includes a box body 4, an air inlet pipe 5, an air outlet pipe 6, a heat exchanger 7 and a fan 8; the air inlet pipe 5 and the air outlet pipe 6 are respectively connected to the box body 4, the heat exchanger 7 and the fan 8 are located inside the box body 4, and at least one of the air inlet pipe 5 and the air outlet pipe 6 is the air duct device of the present application.

[0127] The integrated air conditioner of this embodiment adopts the air duct device of the present application and has all the beneficial technical effects of all the embodiments herein.

[0128] In some possible implementation manners, the air inlet pipe 5 and the air outlet pipe 6 are both arranged on one side of the box body 4 facing the wall or the outdoors, and the ends of the air inlet pipe 5 and the air outlet pipe 6 respectively extend into the outdoor atmosphere. Outdoor air enters the box body 4 through the diversion structure 2 and the air inlet pipe 5. Due to the action of the diversion structure 2, the inlet air noise and inlet air efficiency are relatively high. After the fan 8 does work and makes a 90° turn, it flows through the heat exchanger 7 for heat exchange, absorbs the heat in the heat exchanger 7, the temperature of the refrigerant in the heat exchanger 7 decreases, and it returns to the indoor unit part to cool the indoor air. The air flow after passing through the heat exchanger 7 can enter the air outlet pipe 6 under the action of the diversion structure 2. Due to the action of the diversion structure 2, the outlet air noise and outlet air efficiency are relatively high. The air outlet pipe 6 discharges the air flow to the outdoor atmosphere. The air flow passes through the diffuser structure 3, can recover part of the static pressure, reduce the dynamic pressure loss and flow channel loss at the outlet, and the air volume of the air outlet is relatively large.

[0129] It should be noted that, as mentioned in this article, "several" and "at least one" mean one or more, and "multiple" and "at least two" mean two or more. "And / or" describes the relationship between related objects and indicates that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates an "or" relationship between the related objects before and after.

[0130] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0131] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more unless otherwise clearly and specifically defined.

[0132] In the description of this specification, the descriptions with reference to terms such as "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application.

[0133] The above are only the embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air duct device, characterized in that, the air duct device comprises: a pipe body assembly (1) and a flow guiding structure (2); the pipe body assembly (1) has an air inlet end (101) and an air outlet end (102); the air inlet end (101) is provided with the flow guiding structure (2), a first end of the flow guiding structure (2) extends towards the side where the air outlet end (102) is located, and a second end of the flow guiding structure (2) extends away from the side where the air outlet end (102) is located; at least part of the orthographic projection of the first end of the flow guiding structure (2) along the axial direction of the pipe body assembly (1) is within the range of the orthographic projection of the air inlet end (101) along the axial direction of the pipe body assembly (1), and the flow guiding structure (2) can divide the air flow entering the air inlet end (101) into at least two strands; and / or, the air outlet end (102) is provided with a diffuser structure (3), a first end of the diffuser structure (3) extends towards the side where the air inlet end (101) is located, and a second end of the diffuser structure (3) extends away from the side where the air inlet end (101) is located; at least part of the orthographic projection of the first end of the diffuser structure (3) along the axial direction of the pipe body assembly (1) is within the range of the orthographic projection of the air outlet end (102) along the axial direction of the pipe body assembly (1), and the cross-sectional area of the flow passage at the first end of the diffuser structure (3) is smaller than the cross-sectional area of the flow passage at the second end of the diffuser structure (3).

2. The air duct device according to claim 1, characterized in that, the cross-sectional area of the flow passage at the first end of the flow guiding structure (2) is smaller than the cross-sectional area of the flow passage at the second end of the flow guiding structure (2).

3. The air duct device according to claim 1, characterized in that, the cross-sectional area of the flow passage at the first end of the flow guiding structure (2) is smaller than the cross-sectional area of the flow passage at the air inlet end (101).

4. The air duct device according to any one of claims 1 to 3, characterized in that, the flow guiding structure (2) comprises at least one flow guiding vane (21), and the at least one flow guiding vane (21) is connected to the pipe body assembly (1) through at least one first connecting rib (22).

5. The air duct device according to claim 4, characterized in that, the number of the flow guiding vanes (21) is multiple, and the multiple flow guiding vanes (21) are arranged at intervals along a concentric circle, and the multiple flow guiding vanes (21) respectively divert and guide the air flow.

6. The air duct device according to claim 5, characterized in that, for two adjacent flow guiding vanes (21), the extension length of the flow guiding vane (21) closer to the axis of the pipe body assembly (1) is greater than the extension length of the flow guiding vane (21) farther from the axis of the pipe body assembly (1).

7. The air duct device according to any one of claims 1 to 6, characterized in that, the diffuser structure (3) comprises at least one diffuser vane (31), and the at least one diffuser vane (31) is connected to the pipe body assembly (1) through at least one second connecting rib (32).

8. The air duct device according to claim 7, characterized in that, The number of the diffuser vanes (31) is multiple, and the multiple diffuser vanes (31) are arranged at intervals along a concentric circle, and the multiple diffuser vanes (31) respectively perform diffusing and guiding on the air flow.

9. The air duct device according to claim 8, wherein, the extension length of the diffuser vane (31) close to the axis of the pipe body assembly (1) among two adjacent diffuser vanes (31) is greater than the extension length of the diffuser vane (31) far from the axis of the pipe body assembly (1).

10. The air duct device according to any one of claims 1 to 9, wherein, the pipe body assembly (1) includes an inner pipe body (11), an outer pipe body (12) and a connecting structure (13); the inner pipe body (11) is located inside the outer pipe body (12), and the connecting structure (13) is connected between the inner pipe body (11) and the outer pipe body (12); an inner flow channel (111) is arranged inside the inner pipe body (11), an outer flow channel (121) is arranged between the inner pipe body (11) and the outer pipe body (12), and the air flow directions in the inner flow channel (111) and the outer flow channel (121) are the same.

11. The air duct device according to claim 10, wherein, each guide vane (21) in the guide structure (2) is smoothly connected to the axial end of the inner pipe body (11) or the outer pipe body (12); and / or, each diffuser vane (31) in the diffuser structure (3) is smoothly connected to the axial end of the inner pipe body (11) or the outer pipe body (12).

12. An integrated air conditioner, wherein, the integrated air conditioner includes an outdoor unit part, and the outdoor unit part includes a box body (4), an air inlet duct (5), an air outlet duct (6), a heat exchanger (7) and a fan (8); the air inlet duct (5) and the air outlet duct (6) are respectively communicated with the box body (4), the heat exchanger (7) and the fan (8) are located inside the box body (4), and at least one of the air inlet duct (5) and the air outlet duct (6) is the air duct device according to any one of claims 1 to 11.

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