Wall-mounted air conditioner

Abstract

The wall-mounted air conditioner comprises a machine shell, the machine shell is provided with an air inlet part, a first air outlet part and a second air outlet part, and the first air outlet part and the second air outlet part are located on the same side wall or two oppositely-arranged side walls of the machine shell; the air duct shell assembly defines a first air duct and a second air duct, an inlet of the first air duct communicates with the air inlet part, an outlet of the first air duct communicates with the first air outlet part and an inlet of the second air duct, and an outlet of the second air duct communicates with the second air outlet part; the fan assembly comprises a first cross-flow wind wheel and a second cross-flow wind wheel; and the heat exchanger is located between the air inlet part and the first air duct in the airflow direction. According to the wall-mounted air conditioner disclosed by the embodiment of the invention, the air volume of the wall-mounted air conditioner can be increased and the noise can be reduced on the basis of not changing the thickness and the length of the shell.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a wall-mounted air conditioner. Background Art

[0002] The wall-mounted air conditioner in the related art has a small air volume and a high operating noise, which is difficult to meet the user's usage needs. In addition, it is difficult to increase the air volume and reduce the noise without changing the length and thickness dimensions. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a wall-mounted air conditioner, which can increase the air volume and reduce the noise of the wall-mounted air conditioner without changing the thickness and length of the casing.

[0004] According to an embodiment of the present invention, a wall-mounted air conditioner includes: a casing, the casing having an air inlet, a first air outlet and a second air outlet, the first air outlet and the second air outlet are located on the same side wall of the casing or two oppositely arranged side walls; an air duct shell assembly, the air duct shell assembly is arranged in the casing and defines a first air duct and a second air duct located below the first air duct, the inlet of the first air duct is connected to the air inlet, the outlet of the first air duct is connected to the first air outlet and the inlet of the second air duct, and the outlet of the second air duct is connected to the second air outlet; a fan assembly, the fan assembly includes a first cross-flow fan wheel and a second cross-flow fan wheel, the first cross-flow fan wheel is rotatably arranged in the first air duct, and the second cross-flow fan wheel is rotatably arranged in the second air duct; a heat exchanger, the heat exchanger is arranged in the casing and is located between the air inlet and the first air duct in the air flow direction.

[0005] According to the wall-mounted air conditioner of the embodiment of the present invention, a second air duct located below the first air duct is defined by utilizing an air duct shell assembly, and a second cross-flow fan wheel is arranged in the second air duct. Compared with the wall-mounted air conditioner in the related art, a lower negative pressure area can be formed at the inlet of the first air duct, and the air pressure difference between the air inlet and the inlet of the first air duct is increased, so that more air can flow from the air inlet through the heat exchanger, thereby increasing the air intake of the air inlet. Moreover, since the first cross-flow fan wheel and the second cross-flow fan wheel work together, a larger positive pressure gradient can be formed between the second air outlet and the outlet of the second air duct, thereby increasing the total air outlet of the wall-mounted air conditioner. Without changing the thickness and length of the casing, the air volume of the wall-mounted air conditioner can be increased and the noise can be reduced.

[0006] According to some embodiments of the present invention, the first air outlet is located above the second air outlet.

[0007] According to some embodiments of the present invention, the duct shell assembly includes: a first duct shell, which defines the first duct and includes a first volute and a first volute tongue; and a second duct shell, which is connected to the bottom of the first duct shell, and defines the second duct and includes a second volute and a second volute tongue.

[0008] In some embodiments, the first volute tongue includes a first air guide plate and a first volute tongue body, the first air guide plate extends upward from the side wall of the casing toward the first cross-flow wind wheel, and the first volute tongue body is connected to one end of the first air guide plate close to the first cross-flow wind wheel.

[0009] In some embodiments, the second volute tongue includes a second air guide plate and a second volute tongue body, the second air guide plate extends downwardly from the side wall of the casing toward the second cross-flow wind wheel, and the second volute tongue body is connected to one end of the second air guide plate close to the second cross-flow wind wheel.

[0010] In some embodiments, the first volute tongue and the second volute tongue are located on the same side of a line connecting the centers of the first crossflow wind wheel and the second crossflow wind wheel.

[0011] In some examples, one end of the second volute is connected to the lower end of the first volute, the second volute tongue is arranged below the first volute tongue and defines the first air outlet portion with the first volute tongue, and the second volute tongue and the other end of the second volute define the second air outlet portion.

[0012] In some specific examples, the first air outlet and the second air outlet are disposed on a front wall of the housing, and the first volute tongue extends from the front wall of the housing toward between the first cross-flow impeller and the second cross-flow impeller.

[0013] In some examples, the first volute tongue and the second volute tongue are located on both sides of a line connecting center lines of the first crossflow impeller and the second crossflow impeller.

[0014] In some specific examples, the second volute tongue is connected to the lower end of the first volute case, the second volute case is arranged below the first volute tongue, one end of the second volute case and the first volute tongue define the first air outlet portion, and the other end of the second volute and the second volute tongue define the second air outlet portion.

[0015] In some specific examples, the first air outlet is disposed on a rear wall of the housing, and the first volute tongue extends from the rear wall of the housing toward between the first cross-flow impeller and the second cross-flow impeller.

[0016] According to some embodiments of the present invention, the heat exchanger includes: a first heat exchange part and a second heat exchange part, the first heat exchange part and the second heat exchange part are arranged above the first cross-flow wind wheel and extend from top to bottom in a direction away from each other; a third heat exchange part, the third heat exchange part is arranged on the side of the first cross-flow wind wheel and is connected to the first heat exchange part or the second heat exchange part.

[0017] In some embodiments, the third heat exchange portion and the first volute tongue are arranged on the same side of the first crossflow impeller and the third heat exchange portion is located above the first volute tongue.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a wall-mounted air conditioner according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 The working state diagram of the wall-mounted air conditioner shown in ;

[0022] Figure 3 yes Figure 1 The velocity flow rate simulation diagram of the working state of the wall-mounted air conditioner shown in ;

[0023] Figure 4 yes Figure 1 The velocity vector simulation diagram of the working state of the wall-mounted air conditioner shown in ;

[0024] Figure 5 is a schematic structural diagram of a wall-mounted air conditioner according to an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 The working state diagram of the wall-mounted air conditioner shown in ;

[0026] Figure 7 yes Figure 5 The velocity flow rate simulation diagram of the working state of the wall-mounted air conditioner shown in ;

[0027] Figure 8 yes Figure 5 The velocity vector simulation diagram of the working state of the wall-mounted air conditioner shown in .

[0028] Reference numerals:

[0029] Wall-mounted air conditioner 100,

[0030] The housing 10, the air inlet 101, the first air outlet 102, the second air outlet 103,

[0031] Air duct shell assembly 20,

[0032] The first air duct shell 21, the first air duct 210, the first volute shell 211, the first volute tongue 212, the first air guide plate 2121, the first volute tongue body 2122,

[0033] The second air duct shell 22, the second air duct 220, the second volute shell 221, the second volute tongue 222, the second air guide plate 2221, the second volute tongue body 2222,

[0034] The fan assembly 30, the first crossflow fan wheel 31, the second crossflow fan wheel 32,

[0035] Heat exchanger 40, first heat exchange part 41, second heat exchange part 42, third heat exchange part 43,

[0036] Heating element 50. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] Reference below Figure 1-Figure 8 A wall-mounted air conditioner 100 according to an embodiment of the present invention is described.

[0039] like Figure 1-Figure 2 , Figure 5-Figure 6 As shown, the wall-mounted air conditioner 100 according to the embodiment of the present invention includes a casing 10 , an air duct casing assembly 20 , a fan assembly 30 and a heat exchanger 40 , and the air duct casing assembly 20 , the fan assembly 30 and the heat exchanger 40 are all arranged in the casing 10 .

[0040] The housing 10 has an air inlet 101, a first air outlet 102, and a second air outlet 103. The first air outlet 102 and the second air outlet 103 are located on the same side wall of the housing 10. For example, the first air outlet 102 and the second air outlet 103 are both located on the front wall of the housing 10. For another example, the first air outlet 102 and the second air outlet 103 are both located on the bottom wall of the housing 10. Alternatively, the first air outlet 102 and the second air outlet 103 are located on two oppositely disposed side walls of the housing 10. For example, the first air outlet 102 and the second air outlet 103 are respectively located on the left side wall and the right side wall of the housing 10. For another example, the first air outlet 102 and the second air outlet 103 are respectively located on the front wall and the rear wall of the housing 10.

[0041] The air duct housing assembly 20 defines a first air duct 210 and a second air duct 220. The second air duct 220 is located below the first air duct 210. The inlet of the first air duct 210 is connected to the air inlet 101. The outlet of the first air duct 210 is connected to the first air outlet 102 and the inlet of the second air duct 220. The outlet of the second air duct 220 is connected to the second air outlet 103. In other words, part of the air entering the first air duct 210 from the air inlet 101 can flow out from the first air outlet 102, and the other part can flow through the second air duct 220 and flow out from the second air outlet 103.

[0042] The fan assembly 30 includes a first cross-flow fan wheel 31 and a second cross-flow fan wheel 32. The first cross-flow fan wheel 31 is rotatably disposed in the first air duct 210, and the second cross-flow fan wheel 32 is rotatably disposed in the second air duct 220. Since the second air duct 220 is located below the first air duct 210, the second cross-flow fan wheel 32 is located below the first cross-flow fan wheel 31. In the direction of air flow, the heat exchanger 40 is located between the air inlet 101 and the first air duct 210.

[0043] When the wall-mounted air conditioner 100 is working, the air in the casing 10 forms an airflow under the joint action of the first cross-flow fan wheel 31 and the second cross-flow fan wheel 32, and is discharged from the first air outlet 102 and the second air outlet 103, so that a negative pressure area is formed in the casing 10. Under the action of the air pressure difference, the external air can enter the first air duct 210 from the air inlet 101, part of the air flows to the outside from the first air outlet 102, and part of the air flows to the second air duct 220 under the action of the second cross-flow fan wheel 32, and then flows to the outside from the second air outlet 103, and the cycle repeats.

[0044] According to the wall-mounted air conditioner 100 of the embodiment of the present invention, the second air duct 220 located below the first air duct 210 is defined by utilizing the air duct shell assembly 20, and a second cross-flow fan wheel 32 is arranged in the second air duct 220. Compared with the wall-mounted air conditioner in the related art, a lower negative pressure area can be formed at the inlet of the first air duct 210, and the air pressure difference between the air inlet 101 and the inlet of the first air duct 210 is increased, so that more air can flow from the air inlet 101 through the heat exchanger 40, thereby increasing the air intake of the air inlet 101, and because the first cross-flow fan wheel 31 and the second cross-flow fan wheel 32 work together, a larger positive pressure gradient can be formed between the second air outlet 103 and the outlet of the second air duct 220, thereby increasing the total air outlet of the wall-mounted air conditioner 100. Without changing the thickness and length of the casing 10, the air volume of the wall-mounted air conditioner 100 can be increased and the noise can be reduced.

[0045] Among them, the first air outlet 102 is located above the second air outlet 103. On the basis of increasing the total air volume of the wall-mounted air conditioner 100, the air outlet range of the first air outlet 102 and the second air outlet 103 can cover more in the up and down directions.

[0046] like Figure 1-Figure 2 , Figure 5-Figure 6 As shown, according to some embodiments of the present invention, the air duct shell assembly 20 includes a first air duct shell 21 and a second air duct shell 22, the first air duct shell 21 defines a first air duct 210, the second air duct shell 22 is connected to the bottom of the first air duct shell 21, the second air duct shell 22 defines a second air duct 220, the first air duct shell 21 includes a first volute 211 and a first volute tongue 212, and the second air duct shell 22 includes a second volute 221 and a second volute tongue 222.

[0047] By configuring the air duct shell assembly 20 to include a first air duct shell 21 and a second air duct shell 22, it is equivalent to adding a second air duct shell 22 below the first air duct shell 21, thereby utilizing the second air duct shell 22 to define a second air duct 220, and configuring a second cross-flow fan wheel 32 in the second air duct 220. Since the first cross-flow fan wheel 31 and the second cross-flow fan wheel 32 work together, a lower negative pressure zone can be formed at the inlet of the first air duct 210, so that more air can flow from the air inlet portion 101 through the heat exchanger 40, thereby increasing the air intake of the air inlet portion 101, and also enabling a larger positive pressure gradient to be formed between the second air outlet portion 103 and the outlet of the second air duct 220, thereby increasing the total air outlet of the wall-mounted air conditioner 100. Without changing the thickness and length of the casing 10, the air volume of the wall-mounted air conditioner 100 can be increased and the noise can be reduced.

[0048] like Figure 1 and Figure 5As shown, in some embodiments, the first volute tongue 212 includes a first air guide plate 2121 and a first volute tongue body 2122, the first air guide plate 2121 extends upward from the side wall of the casing 10 toward the first cross-flow wind wheel 31, and the first volute tongue body 2122 is connected to one end of the first air guide plate 2121 close to the first cross-flow wind wheel 31.

[0049] Since the first air duct 210 is higher than the second air duct 220, the outlet of the first air duct 210 is higher than the outlet of the second air duct 220. By setting the first volute tongue 212 to the above-mentioned structure, the first volute tongue body 2122 can prevent the airflow in the first air duct 210 from circulating in the first air duct 210 all the time, and the first air guide plate 2121 can guide the airflow at the outlet of the first air duct 210 to flow toward the first air outlet portion 102, thereby forming a form of air outlet obliquely downward.

[0050] In some embodiments, the second volute tongue 222 includes a second air guide plate 2221 and a second volute tongue body 2222. The second air guide plate 2221 extends downward from the side wall of the casing 10 toward the second cross-flow wind wheel 32. The second volute tongue body 2222 is connected to one end of the second air guide plate 2221 close to the second cross-flow wind wheel 32.

[0051] Since the second air duct 220 is lower than the first air duct 210, the outlet of the second air duct 220 is lower than the outlet of the first air duct 210. By setting the second volute tongue 222 to the above-mentioned structure, the second volute tongue body 2222 can prevent the airflow in the second air duct 220 from circulating in the second air duct 220 all the time, and the second air guide plate 2221 can guide the airflow at the outlet of the second air duct 220 to flow toward the second air outlet portion 103, thereby forming a form of air outlet obliquely upward.

[0052] like Figure 1-Figure 2 As shown, in some embodiments, the first volute tongue 212 and the second volute tongue 222 are located on the same side of a line connecting the centers of the first crossflow impeller 31 and the second crossflow impeller 32 .

[0053] Specifically, the center line of the first crossflow impeller 31 and the second crossflow impeller 32 extends substantially in the up-down direction or is inclined relative to the up-down direction, so that the first air outlet 102 and the second air outlet 103 are located on the same side of the housing 10 .

[0054] For example, the first air outlet 102 and the second air outlet 103 are both located at the front side of the housing 10. When the wall-mounted air conditioner 100 is working, the first cross-flow impeller 31 and the second cross-flow impeller 32 rotate in the same direction, for example, the first cross-flow impeller 31 and the second cross-flow impeller 32 both rotate in the counterclockwise direction.

[0055] With such an arrangement, the first air outlet 102 and the second air outlet 103 can be located on the same side of the casing 10 , and the air volume of the wall-mounted air conditioner 100 can be increased and the noise can be reduced without changing the thickness and length of the casing 10 .

[0056] like Figure 1-Figure 2 As shown, in some examples, one end of the second volute 221 is connected to the lower end of the first volute 211, the second volute tongue 222 is arranged below the first volute tongue 212, and the second volute tongue 222 and the first volute tongue 212 define a first air outlet portion 102, and the second volute tongue 222 and the other end of the second volute 221 define a second air outlet portion 103.

[0057] That is to say, in this embodiment, the first volute 211 of the first air duct shell 21 and the second volute 221 of the second air duct shell 22 correspond in position in the up and down directions, the first volute tongue 212 of the first air duct shell 21 and the second volute tongue 222 of the second air duct shell 22 correspond in position in the up and down directions, the first volute 211 is connected to the second volute 221, the first volute tongue 212 and the second volute tongue 222 are arranged at intervals in the up and down directions, and the first volute tongue 212 is arranged close to the first cross-flow wind wheel 31, and the second volute tongue 222 is arranged close to the second cross-flow wind wheel 32.

[0058] When the wall-mounted air conditioner 100 is working, the air flow entering from the air inlet 101 flows through the heat exchanger 40, and enters the first air duct 210 under the suction action of the first cross-flow wind wheel 31. The air flow flows along the first air duct 210 under the guidance of the first volute 211. A part of the air flow flowing to the outlet of the first air duct 210 is discharged from the first air outlet 102 under the guidance of the first volute tongue 212, and another part of the air flow enters the second air duct 220 under the suction action of the second cross-flow wind wheel 32. This part of the air flow diffracts the second air duct 220 under the guidance of the second volute 221 to flow. The air flow flowing to the outlet of the second air duct 220 is discharged from the second air outlet 103 under the guidance of the second volute tongue 222.

[0059] By connecting the first volute 211 and the second volute 221, not only can the air duct shell assembly 20 form an integral structure, thereby ensuring the structural reliability and stability of the air duct shell assembly 20, but also the first volute tongue 212 and the second volute tongue 222 can be located on the same side of the connection structure of the first volute 211 and the second volute 221, so that the first air outlet 102 and the second air outlet 103 are located on the same side of the casing 10, thereby achieving a large air outlet on the same side of the casing 10.

[0060] In some specific examples, the first air outlet 102 and the second air outlet 103 are disposed on the front wall of the housing 10 , and the first volute tongue 212 extends from the front wall of the housing 10 toward between the first crossflow impeller 31 and the second crossflow impeller 32 .

[0061] Specifically, Figure 1 and Figure 2 As shown, the wall-mounted air conditioner 100 includes a housing 10 , an air duct housing assembly 20 , a fan assembly 30 , a heat exchanger 40 , a filter and a heating element 50 . The top wall of the casing 10 is provided with an air inlet 101, and the filter is arranged at the air inlet 101. The front wall of the casing 10 is provided with a first air outlet 102 and a second air outlet 103. The first air outlet 102 is located above the second air outlet 103. The air duct shell assembly 20 is arranged in the casing 10 and includes a first air duct shell 21 and a second air duct shell 22. The first air duct shell 21 defines a first air duct 210. The inlet of the first air duct 210 is connected to the air inlet 101, and the outlet of the first air duct 210 is connected to the first air outlet 102. The second air duct shell 22 is connected to the bottom of the first air duct shell 21 and defines a second air duct 220. The inlet of the second air duct 220 is connected to the outlet of the first air duct 210, and the outlet of the second air duct 220 is connected to the second air outlet 103.

[0062] The first air duct housing 21 includes a first volute 211 and a first volute tongue 212, the first volute tongue 212 includes a first volute tongue body 2122 and a first air guide plate 2121, the first volute tongue body 2122 and the first volute 211 define an outlet of the first air duct 210, and the first air guide plate 2121 extends obliquely downward from the first volute tongue body 2122 to the front wall of the housing 10. The second air duct housing 22 includes a second volute 221 and a second volute tongue 222, the second volute tongue 222 includes a second volute tongue body 2222 and a second air guide plate 2221, the second volute tongue body 2222 and the second volute 221 define an outlet of the second air duct 220, and the second air guide plate 2221 extends obliquely upward from the second volute tongue body 2222 to the front wall of the housing 10.

[0063] The fan assembly 30 includes a first crossflow fan wheel 31 and a second crossflow fan wheel 32. The first crossflow fan wheel 31 is rotatably disposed in the first air duct 210, and the second crossflow fan wheel 32 is rotatably disposed in the second air duct 220. The heat exchanger 40 is disposed between the first crossflow fan wheel 31 and the air inlet 101, and the heating element 50 is disposed between the heat exchanger 40 and the first crossflow fan wheel 31.

[0064] During operation, external air enters the casing 10 from the air inlet 101, flows through the heat exchanger 40 and the heating element 50, and enters the first air duct 210. Part of the airflow flows out from the first air outlet 102 on the front side of the casing 10 along the first air guide plate 2121, and the other part of the airflow enters the second air duct 220, flows along the second air guide plate 2221 and the second volute 221, and finally flows out from the second air outlet 103 on the front side of the casing 10.

[0065] Compared with the wall-mounted air conditioner in the related art, the present application adds a second air duct 220 below the first air duct 210, so that the inlet of the second air duct 220 is connected with the outlet of the first air duct 210, which changes the flow characteristics of the airflow in the first air duct 210 and makes the wind speed distribution at the outlet of the first air duct 210 more uniform. Figure 3 and Figure 4 As shown, through simulation analysis, the turbulent kinetic energy distribution cloud map and vector map near the first volute tongue 212 and the second volute tongue 222 of the air duct shell assembly 20 are extracted, and it can be found that adding the second crossflow wind wheel 32 can effectively suppress the local high-pressure area near the first volute tongue 212, reduce the impact of the airflow on the first volute tongue 212, improve the airflow at the outlet of the first air duct 210, weaken the low-order unstable flow near the wall of the first volute 211, reduce the turbulent kinetic energy near the wall, make the flow more uniform, and thus reduce the aerodynamic noise.

[0066] At the same time, the second cross-flow wind wheel 32 in the second air duct 220 can continue to work on the airflow, thereby increasing the air volume. Due to the existence of the first cross-flow wind wheel 31 and the second cross-flow wind wheel 32, the area of ​​the air outlet is increased and the air flow velocity at the air outlet is reduced, thereby achieving the effect of reducing noise and increasing air volume.

[0067] In summary, the present application can reduce noise while increasing the air volume, thereby reducing the noise at the same air volume.

[0068] like Figure 5-Figure 6 As shown, in some examples, the first volute tongue 212 and the second volute tongue 222 are located on both sides of a line connecting the center lines of the first crossflow wind wheel 31 and the second crossflow wind wheel 32 .

[0069] Specifically, the center line of the first crossflow impeller 31 and the second crossflow impeller 32 extends substantially in the up-down direction or is inclined relative to the up-down direction, so that the first air outlet 102 and the second air outlet 103 are located on opposite sides of the housing 10 .

[0070] For example, the first air outlet 102 is located at the rear side of the housing 10, and the second air outlet 103 is located at the front side of the housing 10. When the wall-mounted air conditioner 100 is in operation, the first cross-flow impeller 31 and the second cross-flow impeller 32 rotate in opposite directions, for example, the first cross-flow impeller 31 rotates in a clockwise direction, and the second cross-flow impeller 32 rotates in a counterclockwise direction.

[0071] With such an arrangement, the first air outlet 102 and the second air outlet 103 can be located on opposite sides of the casing 10 , thereby increasing the air volume of the wall-mounted air conditioner 100 and reducing noise without changing the thickness and length of the casing 10 .

[0072] like Figure 5-Figure 6As shown, in some specific examples, the second volute tongue 222 is connected to the lower end of the first volute housing 211, and the second volute housing 221 is arranged below the first volute tongue 212, one end of the second volute housing 221 and the first volute tongue 212 define a first air outlet portion 102, and the other end and the second volute tongue 222 define a second air outlet portion 103.

[0073] That is to say, in this embodiment, the first volute 211 of the first air duct shell 21 and the second volute tongue 222 of the second air duct shell 22 correspond in position in the up and down directions, the first volute tongue 212 of the first air duct shell 21 and the second volute 221 of the second air duct shell 22 correspond in position in the up and down directions, the first volute 211 is connected to the second volute tongue 222, the first volute tongue 212 and the second volute 221 are arranged at intervals in the up and down directions, and the first volute tongue 212 is arranged close to the first cross-flow wind wheel 31, and the second volute tongue 222 is arranged close to the second cross-flow wind wheel 32.

[0074] When the wall-mounted air conditioner 100 is working, the air flow entering from the air inlet 101 flows through the heat exchanger 40, and enters the first air duct 210 under the suction action of the first cross-flow wind wheel 31. The air flow flows along the first air duct 210 under the guidance of the first volute 211. A part of the air flow flowing to the outlet of the first air duct 210 is discharged from the first air outlet 102 under the guidance of the first volute tongue 212, and another part of the air flow enters the second air duct 220 under the suction action of the second cross-flow wind wheel 32. This part of the air flow diffracts the second air duct 220 under the guidance of the second volute 221 to flow. The air flow flowing to the outlet of the second air duct 220 is discharged from the second air outlet 103 under the guidance of the second volute tongue 222.

[0075] By connecting the first volute 211 and the second volute tongue 222, not only can the air duct shell assembly 20 form an integral structure, thereby ensuring the structural reliability and stability of the air duct shell assembly 20, but also the first air outlet portion 102 and the second air outlet portion 103 can be located on opposite sides of the casing 10, thereby achieving a large air outlet volume on opposite sides of the casing 10.

[0076] In some specific examples, the first air outlet 102 is disposed on the rear wall of the housing 10 , and the first volute tongue 212 extends from the rear wall of the housing 10 toward between the first cross-flow impeller 31 and the second cross-flow impeller 32 .

[0077] Specifically, Figure 5 and Figure 6As shown, the wall-mounted air conditioner 100 includes a housing 10 , an air duct housing assembly 20 , a fan assembly 30 , a heat exchanger 40 , a filter and a heating element 50 . The top wall of the casing 10 is provided with an air inlet 101, and the filter is arranged at the air inlet 101. The rear wall of the casing 10 is provided with a first air outlet 102, and the front wall of the casing 10 is provided with a second air outlet 103. The first air outlet 102 is located above the second air outlet 103. The air duct shell assembly 20 is arranged in the casing 10 and includes a first air duct shell 21 and a second air duct shell 22. The first air duct shell 21 defines a first air duct 210, and the inlet of the first air duct 210 is connected to the air inlet 101, and the outlet of the first air duct 210 is connected to the first air outlet 102. The second air duct shell 22 is connected to the bottom of the first air duct shell 21 and defines a second air duct 220. The inlet of the second air duct 220 is connected to the outlet of the first air duct 210, and the outlet of the second air duct 220 is connected to the second air outlet 103.

[0078] The first air duct housing 21 includes a first volute 211 and a first volute tongue 212, the first volute tongue 212 includes a first volute tongue body 2122 and a first air guide plate 2121, the first volute tongue body 2122 and the first volute 211 define an outlet of the first air duct 210, and the first air guide plate 2121 extends obliquely downward from the first volute tongue body 2122 to the rear wall of the housing 10. The second air duct housing 22 includes a second volute 221 and a second volute tongue 222, the second volute tongue 222 includes a second volute tongue body 2222 and a second air guide plate 2221, the second volute tongue body 2222 and the second volute 221 define an outlet of the second air duct 220, and the second air guide plate 2221 extends obliquely upward from the second volute tongue body 2222 to the front wall of the housing 10.

[0079] The fan assembly 30 includes a first crossflow fan wheel 31 and a second crossflow fan wheel 32. The first crossflow fan wheel 31 is rotatably disposed in the first air duct 210, and the second crossflow fan wheel 32 is rotatably disposed in the second air duct 220. The heat exchanger 40 is disposed between the first crossflow fan wheel 31 and the air inlet 101, and the heating element 50 is disposed between the heat exchanger 40 and the first crossflow fan wheel 31.

[0080] During operation, external air enters the casing 10 from the air inlet 101, flows through the heat exchanger 40 and the heating element 50, and enters the first air duct 210. Part of the airflow flows out from the first air outlet 102 on the rear side of the casing 10 along the first air guide plate 2121, and the other part of the airflow enters the second air duct 220, flows along the second air guide plate 2221 and the second volute 221, and finally flows out from the second air outlet 103 on the front side of the casing 10.

[0081] Compared with the wall-mounted air conditioner in the related art, the present application adds a second air duct 220 below the first air duct 210, so that the inlet of the second air duct 220 is connected with the outlet of the first air duct 210, which changes the flow characteristics of the airflow in the first air duct 210 and makes the wind speed distribution at the outlet of the first air duct 210 more uniform. Figure 7 and Figure 8 As shown, through simulation analysis, the turbulent kinetic energy distribution cloud map and vector map near the first volute tongue 212 and the second volute tongue 222 of the air duct shell assembly 20 are extracted, and it can be found that adding the second crossflow wind wheel 32 can effectively suppress the local high-pressure area near the first volute tongue 212, reduce the impact of the airflow on the first volute tongue 212, improve the airflow at the outlet of the first air duct 210, weaken the low-order unstable flow near the wall of the first volute 211, reduce the turbulent kinetic energy near the wall, make the flow more uniform, and thus reduce the aerodynamic noise.

[0082] The present application can form a lower negative pressure area at the inlet of the first air duct 210, increasing the pressure difference between the air inlet 101 and the inlet of the first air duct 210, thereby increasing the air intake volume; the first volute 211 and the second volute tongue 222 are arranged adjacent to each other, so that part of the airflow at the first volute 211 can be introduced into the second air duct 220, thereby improving the wind speed uniformity at the outlet of the first air duct 210 and reducing turbulent noise. Since the first air outlet 102 and the second air outlet 103 are arranged, it is equivalent to increasing the air outlet area of ​​the air outlet, so the wind pressure at the air outlet can be reduced, thereby reducing the aerodynamic noise.

[0083] like Figure 1-Figure 2 , Figure 5-Figure 6 As shown, according to some embodiments of the present invention, the heat exchanger 40 includes a first heat exchange part 41, a second heat exchange part 42 and a third heat exchange part 43, the first heat exchange part 41 and the second heat exchange part 42 are arranged above the first crossflow wind wheel 31, and the first heat exchange part 41 and the second heat exchange part 42 extend from top to bottom in a direction away from each other, the third heat exchange part 43 is arranged on the side of the first crossflow wind wheel 31, and the third heat exchange part 43 is connected to the first heat exchange part 41 or the second heat exchange part 42.

[0084] Therefore, by setting the heat exchanger 40 into the above structure, the distribution range of the heat exchanger 40 can be increased, thereby increasing the heat exchange area and improving the working efficiency of the wall-mounted air conditioner 100.

[0085] In some embodiments, the third heat exchange portion 43 and the first volute tongue 212 are disposed on the same side of the first crossflow impeller 31 , and the third heat exchange portion 43 is located above the first volute tongue 212 .

[0086] like Figure 1 and Figure 2As shown, in this embodiment, the first air outlet 102 and the second air outlet 103 are located on the front side of the casing 10, the first volute tongue 212 is located in the front and lower part of the first crossflow wind wheel 31, the second volute tongue 222 is located in front of the second crossflow wind wheel 32, and the third heat exchange part 43 is arranged on the front side of the first crossflow wind wheel 31 and is located above the first volute tongue 212.

[0087] like Figure 5 and Figure 6 As shown, in this embodiment, the first air outlet 102 is located at the rear side of the casing 10, the second air outlet 103 is located at the front side of the casing 10, the first volute tongue 212 is located at the rear and lower part of the first crossflow wind wheel 31, the second volute tongue 222 is located in front of the second crossflow wind wheel 32, and the third heat exchange part 43 is arranged at the rear side of the first crossflow wind wheel 31 and above the first volute tongue 212.

[0088] By arranging the third heat exchange part 43 in this way, on the basis of increasing the distribution range of the heat exchanger 40 , the space above the first volute tongue 212 can be effectively utilized, thereby improving the space utilization rate in the casing 10 .

[0089] In the description of the present invention, it is to be understood that the terms “center”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0090] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

[0091] Other structures and operations of the wall-mounted air conditioner 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A wall-mounted air conditioner, characterized in that: include: A casing, the casing having an air inlet, a first air outlet, and a second air outlet, wherein the first air outlet and the second air outlet are located on the same side wall or two oppositely disposed side walls of the casing; an air duct housing assembly, the air duct housing assembly being disposed on the housing and defining a first air duct and a second air duct located below the first air duct, the inlet of the first air duct being communicated with the air inlet portion, the outlet of the first air duct being communicated with the first air outlet portion and the inlet of the second air duct, and the outlet of the second air duct being communicated with the second air outlet portion; A fan assembly, the fan assembly comprising a first crossflow fan wheel and a second crossflow fan wheel, the first crossflow fan wheel is rotatably disposed in the first air duct, and the second crossflow fan wheel is rotatably disposed in the second air duct; A heat exchanger is disposed in the casing and between the air inlet and the first air duct in the air flow direction.

2. The wall-mounted air conditioner according to claim 1, characterized in that: The first air outlet is located above the second air outlet.

3. The wall-mounted air conditioner according to claim 1, characterized in that: The air duct shell assembly comprises: A first air duct housing, the first air duct housing defines the first air duct and includes a first volute housing and a first volute tongue; A second air duct shell is connected below the first air duct shell, the second air duct shell defines the second air duct and includes a second volute and a second volute tongue.

4. The wall-mounted air conditioner according to claim 3, characterized in that: The first volute tongue includes a first air guide plate and a first volute tongue body. The first air guide plate extends upwardly and obliquely from the side wall of the casing toward the first cross-flow wind wheel. The first volute tongue body is connected to one end of the first air guide plate close to the first cross-flow wind wheel.

5. The wall-mounted air conditioner according to claim 3, characterized in that: The second volute tongue includes a second air guide plate and a second volute tongue body. The second air guide plate extends downwardly and obliquely from the side wall of the casing toward the second cross-flow wind wheel. The second volute tongue body is connected to one end of the second air guide plate close to the second cross-flow wind wheel.

6. The wall-mounted air conditioner according to claim 3, characterized in that: The first volute tongue and the second volute tongue are located on the same side of a line connecting the centers of the first crossflow wind wheel and the second crossflow wind wheel.

7. The wall-mounted air conditioner according to any one of claims 3 to 6, characterized in that: One end of the second volute is connected to the lower end of the first volute, the second volute tongue is arranged below the first volute tongue and defines the first air outlet portion with the first volute tongue, and the second volute tongue and the other end of the second volute define the second air outlet portion.

8. The wall-mounted air conditioner according to claim 7, characterized in that: The first air outlet portion and the second air outlet portion are arranged on the front wall of the housing, and the first volute tongue extends from the front wall of the housing toward between the first cross-flow impeller and the second cross-flow impeller.

9. The wall-mounted air conditioner according to claim 3, characterized in that: The first volute tongue and the second volute tongue are located on both sides of a line connecting the center lines of the first crossflow wind wheel and the second crossflow wind wheel.

10. The wall-mounted air conditioner according to any one of claims 3 to 5 and 9, characterized in that: The second volute tongue is connected to the lower end of the first volute case. The second volute case is arranged below the first volute tongue. One end of the second volute case and the first volute tongue define the first air outlet portion, and the other end of the second volute and the second volute tongue define the second air outlet portion.

11. The wall-mounted air conditioner according to claim 9, characterized in that: The first air outlet is arranged on the rear wall of the housing, and the first volute tongue extends from the rear wall of the housing toward between the first cross-flow impeller and the second cross-flow impeller.

12. The wall-mounted air conditioner according to claim 3, characterized in that: The heat exchanger comprises: A first heat exchange portion and a second heat exchange portion, wherein the first heat exchange portion and the second heat exchange portion are disposed above the first crossflow impeller and extend from top to bottom in a direction away from each other; A third heat exchange part is disposed on a side of the first crossflow impeller and is connected to the first heat exchange part or the second heat exchange part.

13. The wall-mounted air conditioner according to claim 12, characterized in that: The third heat exchange portion and the first volute tongue are arranged on the same side of the first crossflow impeller, and the third heat exchange portion is located above the first volute tongue.

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