Air conditioner

Abstract

An air conditioner, comprising an indoor unit and an outdoor unit. The indoor unit comprises a housing, a partition plate, an indoor heat exchanger, and a fan assembly. An accommodation space is defined in the interior of the housing. The partition plate is disposed inside the housing, and divides the accommodation space into a fan chamber and a heat exchange channel. The partition plate is provided with an air circulation hole communicating the fan chamber and the heat exchange channel. The indoor heat exchanger is disposed in the heat exchange channel, and the fan assembly is disposed inside the fan chamber. The heat exchange channel comprises an installation segment and an expansion segment. The indoor heat exchanger is disposed on the installation segment. The two sides of the expansion segment in a first direction are connected to the partition plate and the installation segment, respectively. The inner diameter of the expansion segment increases along the first direction, the first direction being defined as the direction from the fan assembly to the indoor heat exchanger.

Description

air conditioner

[0001] This application claims priority to Chinese patent application No. 202323670119.3 filed on December 29, 2023, and priority to Chinese patent application No. 202420304406.8 filed on February 19, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of refrigeration technology, and in particular to an air conditioner. Background Art

[0003] The indoor unit of a ducted air conditioner is a ducted unit. Due to its concealed installation and ease of integration with ceiling installations, ducted air conditioners offer a more aesthetically pleasing appearance when installed indoors. Within the indoor unit housing, air flows from the fan cavity through vents into the heat exchange channel. There, it exchanges heat with the indoor heat exchanger through convection and radiation, heating or cooling the airflow and achieving cooling or heating. Summary of the Invention

[0004] In order to solve the problems of poor heat exchange effect and noise in duct-type air conditioners, some embodiments of the present disclosure provide an air conditioner.

[0005] On the one hand, an air conditioner is provided. The air conditioner includes an indoor unit and an outdoor unit that form a refrigeration cycle. The indoor unit includes a shell, a partition, an indoor heat exchanger and a fan assembly. The interior of the shell defines a storage space. The partition is arranged in the shell and divides the storage space into a fan chamber and a heat exchange channel. The partition is provided with ventilation holes connecting the fan chamber and the heat exchange channel. The indoor heat exchanger is arranged in the heat exchange channel, and the fan assembly is arranged in the fan chamber. The heat exchange channel includes a mounting section and an expansion section. The indoor heat exchanger is arranged on the mounting section. The expansion section is connected to the partition and the mounting section on both sides in a first direction, and the inner diameter of the expansion section increases along the first direction. The first direction is the direction from the fan assembly to the indoor heat exchanger.

[0006] In the air conditioner provided in some embodiments of the present disclosure, the two opposite sides of the expansion section are connected to the partition and the mounting section, respectively, and the inner diameter of the expansion section increases along a first direction, so that the expansion section can rectify the airflow exiting the ventilation hole, and the airflow can flow smoothly along the expansion section to the indoor heat exchanger, thereby eliminating the turbulent flow area in the heat exchange channel. In this way, on the one hand, the phenomenon of airflow backflow to the ventilation hole is reduced or even eliminated, so that the air intake volume of the indoor heat exchanger is increased, and the heat exchange effect of the indoor heat exchanger is improved. On the other hand, the smoothness of the airflow in the expansion section is improved, and the noise during the operation of the duct air conditioner is reduced.

[0007] On the other hand, an air conditioner is provided. The air conditioner includes a shell, a heat exchanger and a water receiving pan. The heat exchanger is arranged in the shell and includes at least one of an indoor heat exchanger or an outdoor heat exchanger. The water receiving pan is arranged below the heat exchanger and includes a water receiving shell, a water receiving trough, a cavity and a sound insulation member. The water receiving shell includes a trough bottom wall, and the trough bottom wall abuts against the bottom end of the heat exchanger. The side of the water receiving shell facing the heat exchanger is recessed in a direction away from the heat exchanger to form the water receiving trough. The cavity is arranged on the side of the trough bottom wall away from the water receiving trough, and the trough bottom wall separates the water receiving trough and the cavity. The sound insulation member is made of sound-absorbing material, and the sound insulation member is filled in the cavity.

[0008] In some embodiments of the present disclosure, the air conditioner provided by the present disclosure utilizes a cavity and sound insulation within the water tray to reduce noise at the heat exchanger and improve the air conditioner's performance. Furthermore, the multi-stage structure within the water tray facilitates the drainage of condensed water from the air conditioner while meeting various heat exchanger installation requirements, thereby improving the air conditioner's stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a structural diagram of an air conditioner according to some embodiments;

[0010] FIG2 is a structural diagram of a gas-liquid separator and an oil separator installed between the compressor and the four-way valve shown in FIG1 ;

[0011] FIG3 is a structural diagram of a compressor shown in FIG1 without a four-way valve between the compressor and the outdoor heat exchanger and the indoor heat exchanger;

[0012] FIG4 is a structural diagram of an indoor unit in the related art;

[0013] FIG5 is a schematic diagram of wind field simulation of another indoor unit in operation in the related art;

[0014] FIG6 is a structural diagram of an indoor unit according to some embodiments;

[0015] FIG7 is a structural diagram of a heat exchange channel according to some embodiments;

[0016] FIG8 is another structural diagram of an indoor unit according to some embodiments;

[0017] FIG9 is another structural diagram of an indoor unit according to some embodiments;

[0018] FIG10 is a schematic diagram of the connection structure of the first guide section, the second guide section, and the expansion section according to some embodiments;

[0019] FIG11 is another structural diagram of an indoor unit according to some embodiments;

[0020] FIG12 is a structural diagram of a heat exchange channel according to some embodiments;

[0021] FIG13 is another structural diagram of a heat exchange channel according to some embodiments;

[0022] FIG14 is a partial enlarged view of circle A in FIG13;

[0023] FIG15 is a perspective view of an indoor unit of an air conditioner according to some embodiments;

[0024] FIG16 is a perspective view of an indoor unit of an air conditioner according to some embodiments from another perspective;

[0025] FIG17 is a cross-sectional view of an indoor unit of an air conditioner according to some embodiments;

[0026] FIG18 is a cross-sectional view of a water receiving tray of an air conditioner according to some embodiments;

[0027] FIG19 is a perspective view of a water receiving tray of an air conditioner according to some embodiments;

[0028] FIG20 is another cross-sectional view of a water receiving pan of an air conditioner according to some embodiments;

[0029] FIG21 is a comparison diagram of noise at different wind speeds between a water receiving tray according to some embodiments and a water receiving tray of related art;

[0030] FIG22 is another perspective view of a water receiving tray of an air conditioner according to some embodiments;

[0031] FIG23 is another cross-sectional view of a water receiving tray of an air conditioner according to some embodiments;

[0032] FIG24 is a cross-sectional view of a water receiving pan and an indoor heat exchanger of an air conditioner according to some embodiments;

[0033] 25 is another cross-sectional view of a water pan and an indoor heat exchanger of an air conditioner according to some embodiments.

[0034] Reference numerals: Air conditioner 100; compressor 10; return air end 10A; outlet air end 10B; four-way valve 20; outdoor heat exchanger 30; throttling device 60; indoor unit 500; indoor heat exchanger 50; first heat exchange portion 501; first flow guide portion 5010; bottom wall surface 5011; side wall surface 5012; first end 5013; second end 5014; second heat exchange portion 502; third heat exchange portion 503; housing 51; fan chamber 511; heat exchange channel 512; expansion section 513; first expansion surface 5131; second expansion surface 5132; Mounting section 514; first mounting surface 5141; connecting portion 51411; drainage groove 51410; first sub-drainage groove 51412; second sub-drainage groove 51413; second mounting surface 5142; tapered section 515; first tapered surface 5151; second tapered surface 5152; air outlet 516; air inlet 11; partition 52; ventilation hole 521; fan assembly 53; volute 531; first volute 5311; first guide section 53111; second volute 5312; second guide section 53121; impeller 532; gas-liquid separator 61; oil separator 62; first area C1; second area C2; third area C3; first air outlet surface 31; second air outlet surface 32; water receiving tray 40; second guide portion 401; water collecting portion 402; water receiving shell 41; Water receiving trough 41A; cavity 41B; trough bottom wall 411; water guide section 4111; connecting section 4112; first sub-connecting section 4113; second sub-connecting section 4114; supporting section 4115; transition section 4116; blocking section 4117; trough side wall 412; cavity bottom wall 413; cavity side wall 414; sound insulation member 42. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0036] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0037] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of some embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0038] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can be directly connected or indirectly connected through an intermediary. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0039] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0040] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0041] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0042] An air conditioner is a device that can regulate and control the temperature, humidity and circulating air of the ambient air in a building or structure.

[0043] Figure 1 shows a structural diagram of an air conditioner according to some embodiments. As shown in Figure 1, some embodiments of the present disclosure provide an air conditioner, and the air conditioner 100 may include a compressor 10. The compressor 10 may have an air return port 10A and an air outlet port 10B.

[0044] The air conditioner 100 further includes a four-way valve 20. The four-way valve 20 may have a first port A, a second port B, a third port C, and a fourth port D.

[0045] The air conditioner 100 further includes an outdoor heat exchanger 30. The outdoor heat exchanger 30 is configured to exchange heat with an outdoor environment.

[0046] The air conditioner 100 further includes a throttling device 60. The throttling device 60 can be a pressure reducer or an electronic expansion valve. The pressure reducer can be a capillary tube, which is usually a thin and long copper tube.

[0047] The air conditioner 100 further includes an indoor heat exchanger 50. The indoor heat exchanger 50 is configured to exchange heat with an indoor environment.

[0048] The return air end 10A of the compressor 10 can be connected to the first port A of the four-way valve 20, and the outlet air end 10B of the compressor 10 can be connected to the second port B of the four-way valve 20. The third port C of the four-way valve 20 can be connected to the first end of the outdoor heat exchanger 30. The second end of the outdoor heat exchanger 30 can be connected to the first end of the indoor heat exchanger 50 via the throttling device 60, and the second end of the indoor heat exchanger 50 can be connected to the fourth port D of the four-way valve 20.

[0049] The air conditioner 100 can include an indoor unit and an outdoor unit. The compressor 10, four-way valve 20, and outdoor heat exchanger 30 can be part of the outdoor unit, and correspondingly, the indoor heat exchanger 50 can be part of the indoor unit. The throttling device 60 can be installed in the outdoor unit, the indoor unit, or in the refrigerant pipeline between the outdoor and indoor units. The throttling device 60 only needs to be located between the indoor heat exchanger 50 and the outdoor heat exchanger 30 along the refrigerant flow direction.

[0050] Based on this, driven by the compressor 10 , the refrigerant can circulate between the indoor unit and the outdoor unit and produce a reversible phase change. When the refrigerant produces a phase change, the refrigerant can release or absorb heat through the indoor heat exchanger 50 .

[0051] For example, the refrigerant in the outdoor unit can exchange heat with the surrounding medium (such as air) through the outdoor heat exchanger 30, thereby releasing heat to heat the surrounding air (or absorbing heat to cool the surrounding air). The refrigerant in the indoor unit can exchange heat with the surrounding air through the indoor heat exchanger 50, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the surrounding air).

[0052] By providing the four-way valve 20 , the operating mode of the air conditioner 100 can be flexibly adjusted between the cooling mode and the heating mode, so that the air conditioner 100 can be applied to various usage scenarios.

[0053] When the air conditioner 100 is in cooling or dehumidification mode, taking the solid arrow shown in Figure 1 as an example to represent the flow direction of the refrigerant, the four-way valve 20 can be adjusted to connect the second port B and the third port C, and to connect the fourth port D and the first port A.

[0054] In this way, the high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the outlet end 10B of the compressor 10 through the second port B and the third port C of the four-way valve 20 to the outdoor heat exchanger 30, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the outdoor heat exchanger 30 to heat the air near the outdoor heat exchanger 30.

[0055] Subsequently, under the action of the throttling device 60, the pressure of the liquid refrigerant passing through the throttling device 60 and flowing into the indoor heat exchanger 50 is reduced, allowing the liquid refrigerant to absorb heat and vaporize in the indoor heat exchanger 50. This allows the refrigerant to exchange heat between the outdoor heat exchanger 30 and the indoor heat exchanger 50, thereby cooling the air near the indoor heat exchanger 50. The vaporized refrigerant flowing out of the indoor heat exchanger 50 can sequentially flow through the fourth port D and the first port A of the four-way valve 20, and be sucked into the compressor 10 through the return air port 10A of the compressor 10 and compressed, thereby achieving a circulating flow of the refrigerant.

[0056] When the air conditioner 100 is in heating mode, taking the dotted arrow in FIG. 1 as an example to represent the flow direction of the refrigerant, the four-way valve 20 can be adjusted to connect the second port B and the fourth port D, and connect the third port C and the first port A.

[0057] In this way, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the outlet end 10B of the compressor 10 through the second port B and the fourth port D of the four-way valve 20 to the indoor heat exchanger 50, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the indoor heat exchanger 50 to heat the air near the indoor heat exchanger 50.

[0058] Subsequently, under the action of the throttling device 60, the pressure of the liquid refrigerant passing through the throttling device 60 and flowing into the outdoor heat exchanger 30 is reduced, allowing the liquid refrigerant to absorb heat and vaporize in the outdoor heat exchanger 30. This allows the refrigerant to exchange heat between the outdoor heat exchanger 30 and the indoor heat exchanger 50, thereby cooling the air around the outdoor heat exchanger 30. The vaporized refrigerant can then flow through the third port C and the first port A of the four-way valve 20 in sequence, and be sucked into the compressor 10 through the return air port 10A of the compressor 10 and compressed, thereby achieving a circulating flow of the refrigerant.

[0059] FIG2 shows a structural diagram of a gas-liquid separator and an oil separator installed between the compressor and the four-way valve in FIG1 . To prevent the gaseous refrigerant sucked into the compressor 10 by the return air port 10A of the compressor 10 from being mixed with liquid refrigerant or impurities, as shown in FIG2 , the air conditioner 100 further includes a gas-liquid separator 61. The gas-liquid separator 61 can be installed between the first port A of the four-way valve 20 and the return air port 10A of the compressor 10, so that the first port A can be connected and conducted to the return air port 10A of the compressor 10 through the gas-liquid separator 61. In this way, when the gaseous refrigerant mixed with impurities such as liquid refrigerant or lubricating oil flows to the return air port 10A of the compressor 10 through the gas-liquid separator 61, the gas-liquid separator 61 can separate non-gaseous impurities (such as liquid refrigerant, liquid lubricating oil or other impurities) to prevent the above-mentioned impurities from entering the compressor 10 and affecting the stable operation of the compressor 10.

[0060] As shown in FIG2 , the air conditioner 100 further includes an oil separator 62. The oil separator 62 also connects and conducts between the outlet port 10B of the compressor 10 and the second port B of the four-way valve 20. This allows lubricating oil mixed with the high-temperature, high-pressure gaseous refrigerant to be separated during passage through the oil separator 62. This prevents the lubricating oil from adhering to the inner walls of the outdoor heat exchanger 30 and the indoor heat exchanger 50 as the refrigerant flows through them, thereby improving the heat exchange efficiency of the indoor heat exchanger 50 and the outdoor heat exchanger 30.

[0061] In some other embodiments, the four-way valve 20 may not be required.

[0062] Figure 3 shows a structural diagram of Figure 1 without a four-way valve between the compressor, the outdoor heat exchanger, and the indoor heat exchanger. As shown in Figure 3, the air outlet 10B of the compressor 10 can be connected to the first end of the throttling device 60 via the outdoor heat exchanger 30, and the air return 10A of the compressor 10 can be connected to the second end of the throttling device 60 via the gas-liquid separator 61 and the indoor heat exchanger 50, so that the refrigerant can circulate between the compressor 10, the outdoor heat exchanger 30, the throttling device 60, the indoor heat exchanger 50, the gas-liquid separator 61, and the compressor 10. In this case, the outdoor heat exchanger 30 can be used to heat the surrounding air, and the indoor heat exchanger 50 can be used to cool the surrounding air, so that the air conditioner 100 operates in a cooling mode or a dehumidifying mode (i.e., a cooling-only mode air conditioner).

[0063] It should be noted that the air conditioner 100 may be an all-in-one unit in which the indoor unit and the outdoor unit are integrated in one housing, or may be a split-type air conditioner in which the indoor unit and the outdoor unit are independently and separately installed.

[0064] The following description will be made by taking the air conditioner 100 as a split-type air conditioner and the indoor unit 500 of the air conditioner 100 as a ceiling-mounted duct unit as an example.

[0065] FIG4 shows a structural diagram of an indoor unit in the related art, and FIG5 shows a schematic diagram of wind field simulation of another indoor unit in the related art during operation.

[0066] As shown in Figures 4 and 5, in the indoor unit 500', the airflow flows directly from the fan chamber 511' into the heat exchange channel 512' through the ventilation holes 521'. Since the flow path of the fan chamber 511' is narrow and the flow path of the heat exchange channel 512' is wide, two air supply blind areas (i.e., the first area C1 and the second area C2 in Figure 4) exist after the airflow enters the heat exchange channel 512'. Since the pressure field in the air supply blind areas is unstable and the direction and size of the airflow are irregular, vortices are easily generated in the air supply blind areas, causing part of the airflow to flow back into the ventilation holes 521' after flowing out of the ventilation holes 521' and entering the heat exchange channel 512'. This reduces the amount of airflow flowing to the indoor heat exchanger 50', affecting the heat exchange effect of the duct air conditioner.

[0067] In addition, due to the large air flow impact near the third area C3 in the volute 531′, the air supply blind area will induce pressure oscillation in the third area C3 in the volute 531′, forming a pressure oscillation area, resulting in uneven air flow blowing to the indoor heat exchanger 50′, which also affects the heat exchange effect of the duct air conditioner.

[0068] Based on this, the present disclosure provides a duct air conditioner 100. By providing an expansion section between the fan cavity of the indoor unit 500 and the heat exchange channel, the duct air conditioner 100 can eliminate the turbulent zone in the heat exchange channel, thereby solving the problems of low heat exchange efficiency and noise of the duct air conditioner.

[0069] The indoor unit 500 of the air conditioner 100 in some embodiments of the present disclosure is described in detail below.

[0070] Figure 6 illustrates a block diagram of an indoor unit according to some embodiments. As shown in Figure 6 , the indoor unit 500 of the air conditioner 100 includes a housing 51. The housing 51 defines a storage space within the housing 51. The housing 51 may be a rectangular parallelepiped. An air inlet 11 is provided on one of a pair of opposing side surfaces of the housing 51, and an air outlet 516 is provided on the other side surface. Indoor air is drawn into the housing 51 through the air inlet 11 and then delivered into the indoor space through the air outlet 516.

[0071] In some examples, the air inlet 11 can be connected to an air inlet grille on a ceiling decoration, so that indoor air can flow into the housing 51 through the air inlet grille and the air inlet 11. A flange can be provided on the outside of the air outlet 516, and the air outlet 516 can be connected to an air duct through the flange, and the air duct can extend into the indoor space.

[0072] The indoor unit 500 also includes a partition 52 disposed within the housing 51. The partition 52 divides the housing space into a fan chamber 511 and a heat exchange channel 512. The fan chamber 511 communicates with the air inlet 11, while the heat exchange channel 512 communicates with the air supply port 516. Ventilation holes 521 are provided on the partition 52, connecting the fan chamber 511 and the heat exchange channel 512.

[0073] The indoor unit 500 further includes an indoor heat exchanger 50 , which is disposed in the heat exchange channel 512 .

[0074] The indoor unit 500 further includes a fan assembly 53. The fan assembly 53 is disposed in the fan chamber 511 and is used to guide the air in the fan chamber 511 into the heat exchange channel 512 through the ventilation holes 521. The fan assembly 53 may include a centrifugal fan.

[0075] In this case, the indoor heat exchanger 50 and the fan assembly 53 are spaced apart within the housing 51. The fan assembly 53 draws air from the fan chamber 511 and blows the drawn air toward the heat exchange channel 512 along the vents 521. The air exchanges heat with the indoor heat exchanger 50 through heat convection and heat radiation.

[0076] FIG7 shows a structural diagram of a heat exchange channel according to some embodiments. In some embodiments, as shown in FIG6 and FIG7 , the heat exchange channel 512 includes: an installation section 514 . The indoor heat exchanger 50 is disposed in the installation section 514 .

[0077] The heat exchange channel 512 also includes an expansion section 513. The expansion section 513 is arranged between the mounting section 514 and the partition 52. The expansion section 513 is connected to the partition 52 and the mounting section 514 on both sides in the first direction (i.e., the X direction in Figure 7). The inner diameter of the expansion section 513 increases along the first direction. In this way, the expansion section 513 can rectify the airflow coming out of the ventilation hole 521, and the airflow can flow smoothly along the expansion section 513 to the indoor heat exchanger 50, thereby eliminating the turbulent area in the heat exchange channel 512 and the pressure oscillation area at the ventilation hole 521. Here, the first direction is the direction from the fan assembly 53 to the indoor heat exchanger 50. For example, when the side of the indoor unit 500 facing the user is defined as the front side, the first direction can be from back to front.

[0078] This, on the one hand, reduces or even eliminates the phenomenon of airflow backflow toward the ventilation holes 521, thereby increasing the air intake of the indoor heat exchanger 50 and improving the heat exchange effect of the indoor heat exchanger 50. On the other hand, because the airflow can flow smoothly under the guidance of the expansion section 513, the noise generated during the operation of the air conditioner 100 is reduced.

[0079] In some embodiments, as shown in FIG6 , the fan assembly 53 includes a first volute 5311 (i.e., an upper volute). The fan assembly 53 also includes a second volute 5312 (i.e., a lower volute). The first volute 5311 and the second volute 5312 together form a mounting cavity. The mounting cavity is at least a portion of the fan cavity 511.

[0080] The fan assembly 53 also includes an impeller 532. Impeller 532 is disposed within the mounting cavity. Impeller 532 draws ambient air into the mounting cavity formed by the first volute 5311 and the second volute 5312, thereby forming a high-speed rotating airflow within the mounting cavity. The airflow is then blown toward the heat exchange channel 512 through the ventilation holes 521.

[0081] In some embodiments, the impeller 532 may be an open impeller, a closed impeller, or a semi-open impeller. The type of the impeller 532 may be selected according to circumstances, and the present disclosure does not limit this.

[0082] FIG8 illustrates another structural diagram of an indoor unit 500 according to some embodiments. In some embodiments, as shown in FIG8 , the second volute 5312 includes a first flow guide section 53111. The first flow guide section 53111 is positioned at the vent 521 and connected to the partition 52. The first volute 5311 includes a second flow guide section 53121, which is positioned at the vent 521. The surfaces of the first and second flow guide sections 53111, 53121, for flow diversion can be flat.

[0083] Correspondingly, the expansion section 513 includes a first expansion surface 5131, the two sides of which in the first direction are respectively connected to the first flow guide section 53111 and the mounting section 514. The expansion section 513 also includes a second expansion surface 5132, which is arranged opposite to the first expansion surface 5131 and is respectively connected to the second flow guide section 53121 and the mounting section 514 in the first direction.

[0084] It can be understood that the opening formed by the first guide section 53111 and the second guide section 53121 is arranged on the inner side of the ventilation hole 521 (for example, the side of the ventilation hole 521 close to the heat exchange channel 512), and the airflow in the fan chamber 511 enters the expansion section 513 along the first expansion surface 5131 and the second expansion surface 5132 respectively under the guiding action of the first guide section 53111 and the second guide section 53121.

[0085] In some embodiments, the first expansion surface 5131 may be an arc surface. For example, as shown in FIG8 , the first expansion surface 5131 is an arc surface, and the center O of the first expansion surface 5131 is located on the side of the first expansion surface 5131 away from the indoor heat exchanger 50 .

[0086] It is understood that since the vortex direction of the airflow when it flows back toward the ventilation hole 521 is clockwise, if the first expansion surface 5131 is a circular arc surface with the center of the circular arc located on the side of the circular arc surface away from the indoor heat exchanger 50, the airflow will flow in a counterclockwise direction under the guidance of the first expansion surface 5131. However, the returning airflow will be difficult to flow back to the ventilation hole 521 due to the obstruction of the first expansion surface 5131. Therefore, the amount of backflow airflow can be reduced.

[0087] In some embodiments, as shown in FIG9 , the first expansion surface 5131 is an arc-shaped surface, and the center O of the first expansion surface 5131 is located on the side of the first expansion surface 5131 facing the indoor heat exchanger 50. In this way, the airflow can still flow smoothly from the ventilation hole 521 to the indoor heat exchanger 50 under the guidance of the arc-shaped first expansion surface 5131, and the first expansion surface 5131 can reduce turbulence.

[0088] It should be noted that the position of the circle center O shown in FIG8 and FIG9 is for illustration only and does not constitute a limitation on the position of the circle center O.

[0089] In some embodiments, the first expansion surface 5131 may also be a plane. The airflow can flow smoothly to the indoor heat exchanger 50 under the guidance of the planar first expansion surface 5131, so that the first expansion surface 5131 can reduce turbulence.

[0090] If the angle between the tangent of the first guide section 53111 and the first expansion surface 5131, and the angle between the second guide section 53121 and the second expansion surface 5132 are greater than 10°, the angle at the connection between the volute 531 and the expansion section 513 is large, which will generate greater noise and air volume loss.

[0091] Therefore, in some embodiments, the angle between the first guide section 53111 and the tangent line of the first expansion surface 5131, and the angle between the second guide section 53121 and the second expansion surface 5132 are any value within the range of 0° to 5° or any value within the range of 5° to 10°. For example, the angle between the first guide section 53111 and the tangent line of the first expansion surface 5131, and the angle between the second guide section 53121 and the second expansion surface 5132 are 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, or 10°, etc.

[0092] It is understood that since the airflow from the fan assembly 53 has a relatively high velocity near the vents 521 (e.g., 10 m / s), a sudden change in the angle of the air duct structure that constrains the airflow would generate significant noise and airflow loss. Therefore, the transition between the volute 531 and the expansion section 513 should be smooth to avoid sudden changes.

[0093] FIG10 shows a schematic diagram of the connection structure of the first guide section and the second guide section with the expansion section 513 according to some embodiments. In some examples, as shown in FIG10 , the angle β1 between the first guide section 53111 and the horizontal plane is any value in the range of 10° to 40° (i.e., 10°≤β1≤40°), and the angle β2 between the first expansion surface 5131 and the horizontal plane is any value in the range of 20° to 50° (i.e., 20°≤β2≤50°). For example, the angle β1 is 10°, 20°, 25°, 30°, or 40°, and the angle β2 is 20°, 30°, 35°, 40°, or 50°, etc.

[0094] The angle β3 between the second flow guide section 53121 and the horizontal plane is any value within the range of 0° to 10° (i.e., 0° < β3 ≤ 10°), and the angle β4 between the second expansion surface 5132 and the horizontal plane is any value within the range of 2° to 10° (i.e., 2° ≤ β4 ≤ 10°). For example, the angle β3 is 1°, 3°, 5°, 7°, or 10°, and the angle β4 is 2°, 3°, 5°, 7°, or 10°.

[0095] Alternatively, the angle β3 between the second flow guide section 53121 and the horizontal plane is any value within the range of -10° to 0° (i.e., -10° ≤ β3 ≤ 0°), and the angle β4 between the second expansion surface 5132 and the horizontal plane is any value within the range of 2° to 20° (i.e., 2° ≤ β4 ≤ 20°). For example, the angle β3 is -10°, -7°, -5°, -3°, or 0°, and the angle β4 is 2°, 5°, 10°, 15°, or 20°.

[0096] It should be noted that when the angle β3 is less than 0°, it means that the second guide section 53121 extends toward the lower right (as shown in Figure 10) with the intersection of the second guide section 53121 and the second expansion surface 5132 as the origin. When the angle β3 is greater than or equal to 0°, it means that the second guide section 53121 extends toward the upper right (as shown in Figure 10). In this way, the relative angle between the volute 531 and the expansion section 513 can be within 10°, thereby reducing noise pollution and air volume loss while ensuring smooth airflow from the fan chamber 511 to the heat exchange channel 512.

[0097] Figure 11 illustrates another structural diagram of an indoor unit 500 according to some embodiments. In some embodiments, as shown in Figure 11 , the tangent of the first expansion surface 5131 is tangent to the first guide section 53111, and the extension surface of the second guide section 53121 is coplanar with the second expansion surface 5132. Thus, the angle between the first expansion surface 5131 and the first guide section 53111, and the angle between the second expansion surface 5132 and the second guide section 53121, are zero. Thus, the first expansion surface 5131 becomes an extension of the first guide section 53111, and the second expansion surface 5132 becomes an extension of the second guide section 53121, improving the smoothness of airflow from the fan chamber 511 into the heat exchange channel 512.

[0098] Figure 12 shows a structural diagram of a heat exchange channel 512 according to some embodiments. In some embodiments, as shown in Figure 12 , the heat exchange channel 512 further includes a tapered section 515. The tapered section 515 is located on a side of the mounting section 514 away from the expansion section 513, and the inner diameter of the tapered section 515 decreases along the first direction.

[0099] It is understood that the downstream portion of the indoor heat exchanger 50 is configured as a converging air duct, downstream of which is the air outlet 516 of the indoor unit 500. According to the Bernoulli equation, the total pressure within the heat exchange channel 512 is constant, and this total pressure comprises both static and dynamic pressures. Because the inner diameter of the heat exchange channel 512 contracts at the converging section 515, static pressure is converted into dynamic pressure as the air flows through the converging section 515, thereby increasing the air velocity and air delivery distance of the air as it exits the air outlet 516.

[0100] Figure 13 illustrates another structural diagram of the heat exchange channel 512 according to some embodiments. In some embodiments, as shown in Figures 12 and 13 , the mounting section 514 includes a first mounting surface 5141 connected to the first expansion surface 5131. The mounting section 514 also includes a second mounting surface 5142. The second mounting surface 5142 is disposed opposite the first mounting surface 5141 and connected to the second expansion surface 5132.

[0101] The tapered section 515 includes a first tapered surface 5151 connected to a side of the first mounting surface 5141 away from the first expanding surface 5131. The tapered section 515 also includes a second tapered surface 5152. The second tapered surface 5152 is disposed opposite the first tapered surface 5151 and connected to a side of the second mounting surface 5142 away from the second expanding surface 5132.

[0102] In this case, both ends (i.e., the upper and lower ends) of the indoor heat exchanger 50 in the second direction (i.e., the Y direction in Figure 13) abut against the first mounting surface 5141 and the second mounting surface 5142, respectively. The first expansion surface 5131, the first mounting surface 5141, and the first tapered surface 5151 form the lower edge of the heat exchange channel 512, while the second expansion surface 5132, the second mounting surface 5142, and the second tapered surface 5152 form the upper edge of the heat exchange channel 512. Airflow is smoothly directed along the upper and lower edges to the indoor heat exchanger 50 located in the mounting section 514 for heat exchange. After heat exchange, the airflow is depressurized and accelerated by the tapered section 515, then flows out of the air outlet 516. Here, the second direction is perpendicular to the first direction and parallel to the plane of the partition 52. For example, if the side of the indoor unit 500 facing the user is defined as the front side, the second direction can be from bottom to top.

[0103] It should be noted that the structures of the first tapered surface 5151 and the second tapered surface 5152 in the tapered section 515 can be set to the same structure as the first expansion surface 5131 and the second expansion surface 5132, such as an arc shape or a plane.

[0104] In some embodiments, as shown in FIG13 , the indoor heat exchanger 50 includes a first heat exchange portion 501. The first heat exchange portion 501 is tilted on the first installation surface 5141.

[0105] The indoor heat exchanger 50 further includes a second heat exchange portion 502. The second heat exchange portion 502 is parallel to the plane where the partition plate 52 is located.

[0106] The indoor heat exchanger 50 further includes a third heat exchange portion 503. The third heat exchange portion 503 is disposed on the second mounting surface 5142 at an angle.

[0107] The first heat exchange portion 501, the second heat exchange portion 502, and the third heat exchange portion 503 are sequentially connected along the second direction. At least a portion of the windward side (e.g., the side close to the fan cavity 511) of either the first heat exchange portion 501 or the third heat exchange portion 503 is recessed away from the fan cavity 511 to form a first air guide portion 5010 (i.e., a recessed portion).

[0108] In the first direction, the bottom wall surface 5011 of the first air guide portion 5010 is farther away from the fan cavity 511 than the windward surface 5021 of the second heat exchange portion 502 (such as the side close to the fan cavity 511), and the side wall surface 5012 of the first air guide portion 5010 is used to guide part of the airflow entering the heat exchange channel 512 from the ventilation hole 521 to the corresponding bottom wall surface 5011.

[0109] It is understood that as air flows from the fan chamber 511 into the heat exchange channel 512, the windward surface of the indoor heat exchanger 50 in contact with the airflow can affect heat exchange performance. When the entire windward surface of the indoor heat exchanger 50 is flat, the contact area between the indoor heat exchanger 50 and the airflow is small within the limited space of the heat exchange channel 512, resulting in poor heat exchange efficiency. When the entire windward surface of the indoor heat exchanger 50 is curved, while this increases the contact area between the indoor heat exchanger 50 and the airflow within the limited space of the heat exchange channel 512, it also results in significant variations in wind speed gradients at different locations along the entire windward surface.

[0110] In some embodiments of the present disclosure, the first heat exchange portion 501 is tilted on the first mounting surface 5141, the second heat exchange portion 502 is parallel to the plane where the partition 52 is located, and the third heat exchange portion 503 is tilted on the second mounting surface 5142. In this way, on the one hand, the windward surface of the indoor heat exchanger 50 can be formed by the flat windward surface 5021 and the curved windward side (i.e., the first air guide portion 5010). Therefore, when the indoor heat exchanger 50 has a large contact area with the airflow, the wind speed gradient at different positions on the surface of the indoor heat exchanger 50 can be reduced, so that the heat exchange performance at various positions of the indoor heat exchanger 50 is relatively balanced.

[0111] In some embodiments, the first heat exchange portion 501 is tilted toward one side of the air outlet 516. For example, as shown in FIG13 , the first end 5013 of the first heat exchange portion 501 is the end of the first heat exchange portion 501 away from the first mounting surface 5141, and the second end 5014 of the first heat exchange portion 501 is the end of the first heat exchange portion 501 connected to the first mounting surface 5141. In the first direction, the second end 5014 is located between the first end 5013 and the fan assembly 53.

[0112] The first heat exchange portion 501 is tilted on the first mounting surface 5141 , and an angle α2 between the first tapered surface 5151 and the extended surface of the first mounting surface 5141 is less than or equal to an angle α1 between the first heat exchange portion 501 and the first mounting surface 5141 .

[0113] Similarly, the third heat exchange portion 503 is inclined toward one side of the air outlet 516. For example, the first end of the third heat exchange portion 503 is the end of the third heat exchange portion 503 away from the second mounting surface 5142, and the second end of the third heat exchange portion 503 is the end of the third heat exchange portion 503 connected to the second mounting surface 5142. In the first direction, the second end of the third heat exchange portion 503 is located between the first end of the third heat exchange portion 503 and the fan assembly 53.

[0114] The third heat exchange portion 503 is tilted on the second mounting surface 5142, and the second tapered surface 5152 is configured in the same manner as the first tapered surface 5151. The first tapered surface 5151 and the second tapered surface 5152 can be symmetrically arranged relative to the central axis of the heat exchange channel 512 to improve the uniformity of the wind speed and wind direction of the air flowing out of the air outlet 516.

[0115] It is understood that the angle between the first tapered surface 5151 and the extension of the first mounting surface 5141 forms a contraction angle α2. The larger the contraction angle α2, the greater the resistance to airflow passing through the air outlet 516. In the indoor unit 500 using the aforementioned indoor heat exchanger 50, because the first tapered surface 5151 of the lower edge of the heat exchange channel 512 is close to the first heat exchange portion 501 of the indoor heat exchanger 50, when the contraction angle α2 is at its maximum value, the first tapered surface 5151 is parallel to the first heat exchange portion 501 of the indoor heat exchanger 50 (i.e., α1 = α2), thereby maintaining wind resistance within an appropriate range and preventing wind speed loss caused by excessive wind resistance.

[0116] In some embodiments, the first heat exchange portion 501 may also be tilted toward a side away from the air outlet 516. For example, the first end 5013 of the first heat exchange portion 501 is the end of the first heat exchange portion 501 away from the first mounting surface 5141, and the second end 5014 of the first heat exchange portion 501 is the end of the first heat exchange portion 501 connected to the first mounting surface 5141. In the first direction, the first end 5013 is located between the second end 5014 and the fan assembly 53.

[0117] Figure 14 shows a partial enlarged view of Figure 13 at circle A. In some embodiments, as shown in Figure 14 , the first mounting surface 5141 includes a connecting portion 51411 connected to the first heat exchange portion 501 of the indoor heat exchanger 50. The first mounting surface 5141 also includes a drainage groove 51410.

[0118] In some examples, the drainage groove 51410 may include a first sub-drainage groove 51412 . The first sub-drainage groove 51412 is disposed on a side of the connecting portion 51411 close to the fan cavity 511 .

[0119] In some examples, the drainage groove 51410 may include a second sub-drainage groove 51413. The second sub-drainage groove 51413 is disposed on a side of the connecting portion 51411 away from the fan cavity 511.

[0120] In some examples, the drainage groove 51410 may include a first sub-drainage groove 51412 and a second sub-drainage groove 51413. The first sub-drainage groove 51412 and the second sub-drainage groove 51413 are disposed on opposite sides of the connection portion 51411 in the first direction.

[0121] In this way, the condensed water generated by the indoor heat exchanger 50 during operation can slide along the outer surface of the first heat exchange part 501 into the drainage groove of the first mounting surface 5141, making it difficult for water to accumulate in the heat exchange channel 512. The heat exchange channel 512 can remain dry, reducing the risk of rust and corrosion of the heat exchange channel 512, thereby reducing the risk of water leakage in the indoor unit 500 and improving the reliability of the indoor unit 500 product.

[0122] The foregoing mainly improves the heat exchange effect and reduces noise through the heat exchange channel 512. Of course, in some embodiments, the noise on one side of the heat exchanger (such as the indoor heat exchanger 50 or the outdoor heat exchanger 30) can also be reduced through the water receiving tray.

[0123] The following description mainly takes the indoor heat exchanger 50 as an example. It is understandable that the water receiving tray 40 described below can also be used for an outdoor heat exchanger.

[0124] In some embodiments, as shown in Figures 15 to 17 , in addition to the housing 51, the indoor heat exchanger 50, the partition 52, and the fan assembly 53, the indoor unit 500 further includes a drain pan 40. The drain pan 40 can be disposed below the indoor heat exchanger 50 to collect condensed water condensed on the indoor heat exchanger 50. The drain pan 40 can be connected to a drain pipe connected to the outside of the housing 51 to drain the condensed water to the outside of the housing 51.

[0125] In some embodiments, as shown in Figures 18 to 20 , the water receiving tray 40 includes a water receiving housing 41. The water receiving tray 40 also includes a water receiving trough 41A. The side of the water receiving housing 41 facing the indoor heat exchanger 50 (e.g., the upper side) is recessed away from the indoor heat exchanger 50 (e.g., downward) to form the water receiving trough 41A. The water receiving trough 41A is used to receive condensed water.

[0126] In some embodiments, the water receiving shell 41 can be made of plastic material and can be manufactured by integral injection molding.

[0127] In some embodiments, as shown in Figure 20 , the water receiving housing 41 includes a bottom wall 411. In the airflow direction (e.g., the first direction), the air inlet and outlet ends of the bottom wall 411 are higher than the middle section of the bottom wall 411. In this case, the indoor heat exchanger 50 can be mounted on the bottom wall 411, with the bottom wall 411 abutting the bottom end of the indoor heat exchanger 50.

[0128] As shown in Figure 19, the water receiving housing 41 also includes sidewalls 412. The sidewalls 412 are connected to opposite ends of the bottom wall 411 in the third direction (i.e., the Z direction in Figure 19). The sidewalls 412 and the bottom wall 411 form a water receiving tank 41A. Here, the third direction is perpendicular to the first and second directions. For example, if the side of the indoor unit 500 facing the user is defined as the front side, the third direction can be from right to left.

[0129] In some embodiments, as shown in Figures 19 and 20, the water receiving tray 40 further includes a cavity 41B. The cavity 41B is disposed on a side of the bottom wall 411 facing away from the water receiving trough 41A (e.g., the lower side). The bottom wall 411 separates the water receiving trough 41A and the cavity 41B.

[0130] The water receiving tray 40 further includes a sound insulating member 42 (as shown in FIG18 ). The sound insulating member 42 can be filled in the cavity 41B and is made of a sound absorbing material. The sound absorbing material can be a porous sound absorbing material, a two-component sound absorbing material, a polyacrylonitrile, or other sound absorbing material.

[0131] 19 and 20 , the water receiving housing 41 further includes a cavity bottom wall 413. The cavity bottom wall 413 is located on a side of the tank bottom wall 411 facing away from the water receiving tank 41A (eg, the lower side), and is spaced apart from the tank bottom wall 411.

[0132] The water receiving shell 41 further includes a cavity side wall 414. The cavity side wall 414 is connected between the trough bottom wall 411 and the cavity bottom wall 413. The trough bottom wall 411, the cavity side wall 414 and the cavity bottom wall 413 form a cavity body 41B.

[0133] It should be noted that, as shown in FIG. 19 , the cavity 41B is open on one side in the third direction to facilitate filling the sound insulating member 42 into the cavity 41B from the open side.

[0134] In other embodiments, the water receiving shell 41 may omit the cavity bottom wall 413, and the cavity 41B may be surrounded by the groove bottom wall 411 and the cavity side walls 414 connected around the groove bottom wall 411. In this case, the side of the cavity 41B away from the water receiving groove 41A (such as the lower side) is open.

[0135] At this time, the sound insulation member 42 can be connected to the cavity 41B by bonding.

[0136] As shown in Figure 21, after conducting a noise comparison experiment between the air conditioner in some embodiments of the present disclosure and the air conditioner in the related art, it can be found that: compared with the related art, after the sound insulation member 42 is filled in the cavity 41B of the water receiving tray 40, the noise generated by the air conditioner 100 in some embodiments of the present disclosure is reduced, especially at high wind speed gear, the noise can be reduced by about 1dB (A).

[0137] In some embodiments, as shown in FIG22 , the water receiving tray 40 includes a second guide portion 401 . The second guide portion 401 is located below the indoor heat exchanger 50 , and condensed water flowing down from the indoor heat exchanger 50 drips onto the second guide portion 401 .

[0138] The water receiving tray 40 further includes a water collecting portion 402. The water collecting portion 402 is connected to one side of the second flow guiding portion 401 in the third direction.

[0139] The bottom of the second guide portion 401 decreases in height as it approaches the water collecting portion 402, allowing the condensed water in the second guide portion 401 to flow toward the water collecting portion 402. A drainage component such as a water pump can be installed at the water collecting portion 402 to remove the condensed water flowing toward the water collecting portion 402.

[0140] It is understandable that the second air guide portion 401 may be formed by at least a portion of the groove bottom wall 411 being recessed in a direction away from the indoor heat exchanger 50 .

[0141] In some embodiments, as shown in FIG23 , the bottom wall 411 of the trough includes a water guide section 4111. The water guide section 4111 extends along the third direction and communicates with the water collection portion 402. The end of the water guide section 4111 away from the water collection portion 402 is higher than the end of the water guide section 4111 closer to the water collection portion 402, so that condensed water within the water guide section 4111 can flow toward the water collection portion 402 due to gravity. It is understood that the second flow guide portion 401 includes at least the water guide section 4111.

[0142] The trough bottom wall 411 further includes a connecting section 4112. The connecting section 4112 is connected to a first end of the water guide section 4111, which is adjacent to the air inlet 11. The connecting section 4112 is inclined toward the indoor heat exchanger 50 (e.g., upward) from the first end of the connecting section 4112, which is adjacent to the water guide section 4111, to the second end of the connecting section 4112, which is distal to the water guide section 4111.

[0143] If the inclination angle of the connecting section 4112 relative to the horizontal plane is greater than 50°, the connecting section 4112 is too steep and easily causes turbulence; if the inclination angle of the connecting section 4112 relative to the horizontal plane is less than 25°, it will affect the wind speed distribution at the indoor heat exchanger 50 and affect the heat exchange effect.

[0144] Therefore, the inclination angle of the connecting section 4112 relative to the horizontal plane is any value within the range of 25° to 50°. For example, the inclination angle of the connecting section 4112 relative to the horizontal plane is 25°, 30°, 35°, 40°, 45°, or 50°.

[0145] Since the lowest end of the connecting section 4112 (ie, the first end of the connecting section 4112 ) is connected to the water guiding section 4111 , the condensed water on the connecting section 4112 can flow to the water guiding section 4111 under the action of gravity.

[0146] In some embodiments, as shown in FIG23 , the connecting section 4112 includes a first sub-connecting section 4113. The first sub-connecting section 4113 is connected to the water guide section 4111. If the inclination angle B1 of the first sub-connecting section 4113 relative to the horizontal plane is less than 40°, it will affect the wind speed distribution at the indoor heat exchanger 50 and the heat exchange effect. If the inclination angle B1 of the first sub-connecting section 4113 relative to the horizontal plane is greater than 50°, it is likely to cause turbulence. Therefore, the inclination angle B1 of the first sub-connecting section 4113 relative to the horizontal plane is any value within the range of 40° to 50°. For example, the angle B1 is 40°, 43°, 45°, 48°, or 50°.

[0147] Connecting section 4112 may include a second sub-connecting section 4114. Second sub-connecting section 4114 is connected to a second end of first sub-connecting section 4113 that is away from water-conducting section 4111. An inclination angle B2 of second sub-connecting section 4114 relative to the horizontal plane may be smaller than an inclination angle B1 of first sub-connecting section 4113, thereby facilitating airflow in connecting section 4112.

[0148] In some embodiments, as shown in Figure 23, the height of the second end of the water-guiding segment 4111 away from the first sub-connecting segment 4113 is H1. The height of the first end of the water-guiding segment 4111 close to the first sub-connecting segment 4113 is H2. In other words, the height of the bottom end of the first sub-connecting segment 4113 (i.e., the first end of the first sub-connecting segment 4113) is H2. The relative height of the first sub-connecting segment 4113 is H3. Here, the relative height of the first sub-connecting segment 4113 can be understood as the dimension between the first end of the first sub-connecting segment 4113 close to the water-guiding segment 4111 and the second end of the first sub-connecting segment 4113 away from the water-guiding segment 4111 in the second direction.

[0149] Relative height H3 can be greater than height H2. Thus, the smaller height H2 can reduce the height dimension of the water receiving pan 40, while the larger relative height H3 allows the water receiving pan 40 to effectively support the indoor heat exchanger 50. For example, the ratio of relative height H3 to height H2 can be 2:1. This allows the indoor heat exchanger 50 to be effectively supported while reducing the height dimension of the water receiving pan 40.

[0150] As shown in Figure 24, when the indoor heat exchanger 50 is installed at an angle in the heat exchange channel 512, the end of the indoor heat exchanger 50 close to the water receiving tray 40 (i.e., the bottom end) can abut against the connecting section 4112, so that the connecting section 4112 can support the indoor heat exchanger 50.

[0151] In addition, the first sub-connection section 4113 and the second sub-connection section 4114 can form two different support angles for the indoor heat exchanger 50 , thereby meeting the installation requirements of the indoor heat exchanger 50 at different tilt angles.

[0152] In some embodiments, as shown in FIG. 23 , the trough bottom wall 411 further includes a support section 4115 , which is connected to the second end of the water guide section 4111 close to the air outlet 516 .

[0153] From the first end of the support section 4115 away from the water guiding section 4111 to the second end of the support section 4115 close to the water guiding section 4111, the support section 4115 is inclined in the direction away from the indoor heat exchanger 50 (i.e. downward), so that the condensed water on the support section 4115 can flow into the water guiding section 4111.

[0154] If the inclination angle A1 of the support section 4115 relative to the horizontal plane is less than 3°, the condensed water on the support section 4115 will have difficulty flowing into the water guide section 4111; if the inclination angle A1 of the support section 4115 relative to the horizontal plane is greater than 10°, the inclination angle of the support section 4115 is large, which makes it inconvenient to stably support the indoor heat exchanger 50.

[0155] Therefore, the inclination angle A1 of the support section 4115 relative to the horizontal plane can be any value within the range of 3° to 10°. For example, the inclination angle A1 is 3°, 5°, 7°, 9°, or 10°.

[0156] As shown in Figure 25 , when the indoor heat exchanger 50 is installed vertically within the heat exchange channel 512, that is, the bottom end of the indoor heat exchanger 50 is approximately horizontal, the bottom end of the indoor heat exchanger 50 can abut against the support section 4115, thereby supporting the indoor heat exchanger 50. In this case, the support section 4115 can be tilted at a small angle, thereby ensuring that the condensed water flows toward the water guide section 4111 while still supporting the indoor heat exchanger 50. It will be appreciated that the inclination angle of the support section 4115 relative to the horizontal plane is smaller than the inclination angle of the connecting section 4112 relative to the horizontal plane.

[0157] In some embodiments, as shown in Figures 23 to 25, the bottom wall 411 further includes a transition section 4116 (i.e., an arc segment). The transition section 4116 is connected to the first end of the support section 4115, which is away from the water guide section 4111. The transition section 4116 can facilitate the smooth flow of air. The transition section 4116 can be arc-shaped.

[0158] In the case where the indoor heat exchanger 50 is bent multiple times in the second direction, for example, in the case where the indoor heat exchanger 50 includes the above-mentioned first heat exchange part 501, the second heat exchange part 502 and the third heat exchange part 503, as shown in Figure 25, the indoor heat exchanger 50 includes a first air outlet surface 31 located on the air outlet side, and the first air outlet surface 31 (i.e., the bottom air outlet surface) and the side of the indoor heat exchanger 50 close to the water receiving tray 40 (such as the bottom surface) can be connected by a second air outlet surface 32 (i.e., the arc air outlet surface) through an arc transition, and the second air outlet surface 32 is arc-shaped.

[0159] In this case, the radius of the second air outlet surface 32 may be consistent with the radius of the transition section 4116 .

[0160] The bottom surface of the indoor heat exchanger 50 abuts against a section of the support section 4115 close to the transition section 4116, and the second air outlet surface 32 of the indoor heat exchanger 50 contacts the transition section 4116. In this way, the transition section 4116 can further improve the supporting effect of the water receiving tray 40 on the indoor heat exchanger 50.

[0161] 25 , the groove bottom wall 411 further includes a blocking section 4117 connected to the first end of the support section 4115. For example, the blocking section 4117 is connected to the end of the transition section 4116 away from the support section 4115.

[0162] From the first end of the blocking section 4117 away from the supporting section 4115 to the second end of the blocking section 4117 close to the supporting section 4115, the blocking section 4117 is inclined in a direction away from the indoor heat exchanger 50 (such as downward), so that the condensed water on the blocking section 4117 can flow toward the transition section 4116 and flow into the water guiding section 4111 through the transition section 4116 and the supporting section 4115.

[0163] If the inclination angle A2 of the blocking section 4117 relative to the horizontal plane is less than 50°, the condensed water will easily flow out of the water receiving tray 40 under the action of the air flow; if the inclination angle A2 of the blocking section 4117 relative to the horizontal plane is greater than 60°, the blocking section 4117 will hinder the air flow from flowing out of the air supply port 516.

[0164] Therefore, the inclination angle A2 of the blocking section 4117 relative to the horizontal plane can be any value within the range of 50° to 60° to prevent the condensed water from flowing out of the water receiving tray 40 under the action of the airflow. For example, the inclination angle A2 is 50°, 53°, 55°, 57°, or 60°.

[0165] In the air conditioner 100 of some embodiments of the present disclosure, by providing a cavity 41B below the water receiving groove 41A on the water receiving tray 40 and filling the cavity 41B with a sound insulating member 42, the noise on one side of the indoor heat exchanger 50 can be reduced.

[0166] In addition, a connecting section 4112 and a supporting section 4115 are respectively provided on both sides of the water guiding section 4111. The connecting section 4112 has a large inclination angle and can support the inclined installed indoor heat exchanger 50; the supporting section 4115 has a small inclination angle, which can support the indoor heat exchanger 50 installed horizontally at the bottom while guiding the condensed water to the water guiding section 4111. Therefore, the water receiving tray 40 meets the requirements of various installation forms of the indoor heat exchanger 50, and has the advantages of strong versatility and wide adaptability.

[0167] It is understandable that the structure of the water receiving tray 40 can also be applied to the heat exchange channel 512 with the expansion section 513, which will not be described in detail here.

[0168] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0169] It should be noted that any one of the disclosed technical solutions in the present disclosure can solve one or more of the above-mentioned technical problems to a certain extent and achieve corresponding technical effects. Alternatively, multiple disclosed technical solutions can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve corresponding technical effects. Alternatively, some of the disclosed technical solutions are combined into an overall solution, and combined with related technologies and deterioration solutions, but the solution can compensate for the deterioration trend through the technical means of the present disclosure, thereby solving one or more of the above-mentioned technical problems to a certain extent as a whole and achieving corresponding technical effects. Alternatively, each disclosed technical solution is combined into a complete technical solution, constituting an organic and inseparable overall solution, thereby solving the technical problems as a whole and achieving corresponding technical effects.

[0170] Any technical solution disclosed in this disclosure, as well as the recombination of multiple technical solutions disclosed, can form a complete technical solution, and can solve one or more of the above-mentioned technical problems and achieve corresponding technical effects. They all belong to the content of this disclosure and are the content that is directly and unambiguously determined based on the content of this disclosure.

[0171] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. An air conditioner, comprising an indoor unit and an outdoor unit forming a refrigeration cycle, wherein the indoor unit includes: A housing, an accommodation space being defined inside the housing; A partition plate, disposed inside the housing and separating the accommodation space into a blower chamber and a heat exchange passage, the partition plate being provided with ventilation holes communicating the blower chamber and the heat exchange passage; An indoor heat exchanger, disposed in the heat exchange passage; And A blower assembly, disposed in the blower chamber; Wherein, the heat exchange passage includes: An installation section, the indoor heat exchanger being disposed on the installation section; and An expansion section, two sides of the expansion section in a first direction are respectively connected to the partition plate and the installation section, an inner diameter of the expansion section increases along the first direction, and the first direction is a direction from the blower assembly to the indoor heat exchanger.

2. The air conditioner according to claim 1, wherein The blower assembly includes: An impeller; A first volute, including a second guiding section disposed at the ventilation holes; and A second volute, the first volute and the second volute enclosing to form an installation cavity, the impeller being disposed in the installation cavity, the second volute including a first guiding section disposed at the ventilation holes and connected to the partition plate; The expansion section includes: A first expansion surface, two sides of the first expansion surface in the first direction are respectively connected to the first guiding section and the installation section; and A second expansion surface, oppositely disposed to the first expansion surface, two sides of the second expansion surface in the first direction are respectively connected to the second guiding section and the installation section.

3. The air conditioner according to claim 2, wherein, The first expansion surface is an arc surface, and a center of the arc surface is located on a side of the arc surface away from the indoor heat exchanger.

4. The air conditioner according to claim 3, wherein, An included angle between a tangent of the first guiding section and the first expansion surface is less than or equal to 10°; an included angle between the second guiding section and the second expansion surface is less than or equal to 10°.

5. The air conditioner according to claim 4, wherein, The tangent of the first expansion surface is tangent to the first guiding section; an extension surface of the second guiding section is coplanar with the second expansion surface.

6. The air conditioner according to any one of claims 2 to 5, wherein, The heat exchange passage further includes: A tapered section, located on a side of the installation section away from the expansion section, an inner diameter of the tapered section decreasing along the first direction.

7. The air conditioner according to claim 6, wherein The installation section includes: A first installation surface, the first installation surface being connected to the first expansion surface; and A second installation surface, oppositely disposed to the first installation surface, the second installation surface being connected to the second expansion surface; The tapered section includes: A first tapered surface, connected to a side of the first installation surface away from the first expansion surface; and A second tapered surface, oppositely disposed to the first tapered surface and connected to a side of the second installation surface away from the second expansion surface.

8. The air conditioner according to claim 7, wherein, The indoor heat exchanger includes: A first heat exchange part, the first heat exchange part being obliquely disposed on the first installation surface; A second heat exchange part, the second heat exchange part being parallel to a plane where the partition plate is located; and A third heat exchange part, the third heat exchange part being obliquely disposed on the second installation surface; Wherein, the first heat exchange part, the second heat exchange part, and the third heat exchange part are sequentially connected along a second direction perpendicular to the first direction. At least a part of the windward side of either the first heat exchange part or the third heat exchange part is recessed away from the blower cavity to form a first flow guiding part, and the bottom wall surface of the first flow guiding part is farther away from the blower cavity than the windward surface of the second heat exchange part; The included angle between the first tapered surface and the extension surface of the first mounting surface is less than or equal to the included angle between the first heat exchange part and the first mounting surface; The included angle between the second tapered surface and the extension surface of the second mounting surface is less than or equal to the included angle between the third heat exchange part and the second mounting surface.

9. The air conditioner according to claim 7 or 8, wherein, The first mounting surface includes: A connecting part connected to the indoor heat exchanger, and A drain trough, where the drain trough includes at least one of the following: A first sub-drain trough provided on the side of the connecting part close to the blower cavity; or A second sub-drain trough provided on the side of the connecting part away from the blower cavity.

10. An air conditioner, comprising: A housing; A heat exchanger disposed within the housing, where the heat exchanger includes at least one of an indoor heat exchanger or an outdoor heat exchanger; A water receiving tray disposed below the heat exchanger and including: A water receiving shell including a trough bottom wall that abuts against the bottom end of the heat exchanger; A water receiving trough, where the side of the water receiving shell facing the heat exchanger is recessed away from the heat exchanger to form the water receiving trough; A cavity disposed on the side of the trough bottom wall facing away from the water receiving trough, with the trough bottom wall separating the water receiving trough and the cavity; and A sound insulation member made of a sound-absorbing material, and the sound insulation member is filled in the cavity.

11. The air conditioner according to claim 10, wherein, At least one side of the cavity is open.

12. The air conditioner according to claim 11, wherein, The water receiving shell further includes: A cavity bottom wall located on the side of the trough bottom wall facing away from the water receiving trough and spaced apart from the trough bottom wall; and A cavity side wall connected between the trough bottom wall and the cavity bottom wall, with the trough bottom wall, the cavity bottom wall, and the cavity side wall enclosing the cavity, and one side of the cavity is open in a third direction.

13. The air conditioner according to claim 11, wherein, The water receiving shell further includes a cavity side wall, and the cavity side wall is connected around the trough bottom wall. The trough bottom wall and the cavity side wall enclose the cavity, and the side of the cavity away from the water receiving trough is open.

14. The air conditioner according to any one of claims 10 to 13, wherein, The water receiving tray further includes: A second flow guiding part, where at least a part of the trough bottom wall is recessed away from the heat exchanger to form the second flow guiding part; and A water collecting part, and the water collecting part is connected to one side of the second flow guiding part in a third direction.

15. The air conditioner according to claim 14, wherein, An air inlet and an air outlet are provided on the housing; the trough bottom wall includes: A water guiding section, and the second flow guiding part includes the water guiding section; A connecting section, and the connecting section inclines towards the heat exchanger in the direction from the first end of the connecting section close to the water guiding section to the second end of the connecting section away from the water guiding section. The first end of the connecting section is connected to the first end of the water guiding section close to the air inlet; and Support section, in the direction from the first end of the support section away from the water guide section to the second end of the support section close to the water guide section, the support section is inclined away from the heat exchanger. The second end of the support section is connected to the second end of the water guide section close to the air supply opening. The inclination angle of the support section relative to the horizontal plane is smaller than the inclination angle of the connection section relative to the horizontal plane.

16. The air conditioner according to claim 15, wherein, The connection section includes: A first sub-connection section, the first end of the first sub-connection section is connected to the water guide section; and A second sub-connection section, connected to the second end of the first sub-connection section away from the water guide section. The inclination angle of the second sub-connection section relative to the horizontal plane is smaller than the inclination angle of the first sub-connection section relative to the horizontal plane.

17. The air conditioner according to claim 15 or 16, wherein, The inclination angle of the support section relative to the horizontal plane is any value within the range of 3° to 10°.

18. The air conditioner according to any one of claims 15 to 17, wherein, The heat exchanger satisfies one of the following: The heat exchanger is inclined and installed in the housing, and the heat exchanger abuts against the connection section; and The heat exchanger is vertically installed in the housing, and the heat exchanger abuts against the support section.

19. The air conditioner according to any one of claims 15 to 18, wherein, The bottom wall of the groove further includes a blocking section, the blocking section is connected to the first end of the support section. In the direction from the first end of the blocking section away from the support section to the second end of the blocking section close to the support section, the blocking section is inclined away from the heat exchanger.

20. The air conditioner according to claim 19, wherein, The bottom wall of the groove further includes a transition section, the transition section is connected between the support section and the blocking section and is arc-shaped.

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