Air conditioner indoor unit

Abstract

An air conditioner indoor unit (100), the air conditioner indoor unit (100) comprising: a fan (600) and a heat exchanger (10). The fan (600) and the heat exchanger (10) are arranged in a first direction, and the heat exchanger (10) comprises: a plurality of fins (2) that are spaced apart, an included angle between the length direction of the fins (2) and the first direction being an acute angle; and heat exchange tubes (1), a plurality of heat exchange tubes (1) being provided, the heat exchange tubes (1) penetrating the plurality of fins (2), the plurality of heat exchange tubes (1) being connected to form a heat exchange flow path (3), and the flow direction of a refrigerant in the heat exchange flow path (3) being the same as the length direction of the fins (2). In a cooling mode, the flow direction of the refrigerant in the heat exchange flow path (3) is the same as a wind direction formed by the fan (600), and the wind speed formed by the fan (600) gradually increases along the direction of the wind direction.

Description

Air conditioner indoor unit

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202311655037.3 and application date December 4, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the technical field of air handling equipment, and in particular to an air-conditioning indoor unit. Background Art

[0004] In the heat exchanger, the air flow rate is unevenly distributed on the entire windward surface of each heat exchanger. Due to the uneven wind field, the refrigerant heat transfer coefficient and the air heat transfer coefficient are not coordinated, and the heat exchange effect is poor.

[0005] Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an air conditioner indoor unit, wherein the heat exchanger makes the variation trend of the heat transfer coefficient of the refrigerant adapt to the variation trend of the heat transfer coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger.

[0007] According to an air-conditioning indoor unit of an embodiment of the present application, the air-conditioning indoor unit includes: a fan and a heat exchanger, the fan and the heat exchanger are arranged in a first direction, the heat exchanger includes: a plurality of spaced fins, the angle between the length direction of the fin and the first direction is an acute angle; a heat exchange tube, the heat exchange tube is multiple, the heat exchange tube is passed through the multiple fins, the multiple heat exchange tubes are connected to form a heat exchange flow path, the refrigerant flow direction in the heat exchange flow path is the same as the length direction of the fin; in the cooling mode, the refrigerant flow direction in the heat exchange flow path is the same as the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the direction of the wind direction.

[0008] According to the air conditioner indoor unit of the embodiment of the present application, heat exchange tubes are installed on multiple fins, and the multiple heat exchange tubes are connected to form a heat exchange flow path. In cooling mode, the refrigerant flow direction in the heat exchange flow path is the same as the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the wind direction. As a result, in cooling mode, the heat exchange coefficient of the refrigerant and the heat exchange coefficient of the air both gradually increase along the wind direction, thereby making the changing trend of the refrigerant heat exchange coefficient consistent with the changing trend of the air heat exchange coefficient, thereby improving the heat exchange efficiency of the heat exchanger.

[0009] In some embodiments of the present application, in the heating mode, the flow direction of the refrigerant in the heat exchange flow path is opposite to the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the wind direction.

[0010] In some embodiments of the present application, the air-conditioning indoor unit includes a heat exchange duct, the heat exchange duct is formed with an installation cavity and a heat exchange inlet and a heat exchange outlet connected to the installation cavity, the fan is arranged at one end close to the heat exchange outlet, the heat exchanger is arranged in the installation cavity, one end of the heat exchanger is located on one side of the heat exchange inlet, and the other end of the heat exchanger extends toward the direction of the heat exchange outlet and is inclined toward one side of the heat exchange inlet.

[0011] In some embodiments of the present application, the heat exchange tubes are arranged in a row, and multiple heat exchange tubes are arranged at intervals in the length direction of the fins. The multiple heat exchange tubes are connected in series in sequence along the length direction of the fins to form the heat exchange flow path.

[0012] In some embodiments of the present application, the heat exchange tubes are arranged in multiple rows at intervals in the width direction of the fins, and each row of the heat exchange tubes includes multiple heat exchange tubes arranged at intervals in the length direction of the fins.

[0013] In some embodiments of the present application, the heat exchange flow path includes multiple heat exchange sub-flow paths in parallel, and the number of the multiple heat exchange sub-flow paths is the same as the number of rows of the heat exchange tubes. In the cooling mode, the flow direction of the refrigerant in the heat exchange sub-flow path is the same as the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the wind direction.

[0014] In some embodiments of the present application, each of the heat exchange sub-flow paths includes a portion of the heat exchange tubes in at least two rows of the heat exchange tubes.

[0015] In some embodiments of the present application, each of the heat exchange sub-flow paths includes the same number of rows of heat exchange tubes.

[0016] In some embodiments of the present application, in the length direction of the fin, the switching positions of the plurality of heat exchange sub-flow paths from one row of the heat exchange tubes to another row of the heat exchange tubes are the same.

[0017] In some embodiments of the present application, in the cooling mode, multiple rows of the heat exchange tubes in the same heat exchange sub-flow path are connected in series in the length direction of the fins.

[0018] In some embodiments of the present application, in cooling mode, the inlet ends of the plurality of heat exchange sub-flow paths are connected to the same distributor.

[0019] In some embodiments of the present application, the fin is rectangular, and at least one of the four corners of the fin has a notch.

[0020] In some embodiments of the present application, there are multiple heat exchangers, and the multiple heat exchangers are arranged along a second direction, the second direction is perpendicular to the first direction, and the multiple heat exchange paths are connected in parallel.

[0021] In some embodiments of the present application, the length directions of the fins of any two adjacent heat exchangers among the multiple heat exchangers are angled to each other, and any two adjacent heat exchangers are connected along one end of the length direction of the fin. When the number of the heat exchangers is greater than or equal to three, the two ends of the length direction of the heat exchanger located in the middle of any three adjacent heat exchangers are respectively connected to one end of the length direction of the other two heat exchangers.

[0022] In some embodiments of the present application, the fins, the heat exchange tubes, and the heat exchange flow paths of the multiple heat exchangers are the same.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] FIG1 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present application, wherein heat exchange tubes are arranged in a row;

[0026] FIG2 is a partial cross-sectional view of the indoor unit of the air conditioner according to the first embodiment of the present application, wherein the heat exchange tubes are arranged in a row;

[0027] FIG3 is a partial cross-sectional view of an air conditioner indoor unit according to a second embodiment of the present application, wherein the heat exchange tubes are arranged in two rows;

[0028] FIG4 is a partial cross-sectional view of an air conditioner indoor unit according to a third embodiment of the present application, wherein the heat exchange tubes are arranged in three rows;

[0029] FIG5 is a partial cross-sectional view of the air-conditioning indoor unit of the fourth embodiment of the present application, in which there are four rows of heat exchange tubes.

[0030] Figure numerals: 100, air conditioner indoor unit; 10, heat exchanger; 1, heat exchange tube; 2, fin; 3, heat exchange flow path; 31, inlet end; 32, outlet end; 33, heat exchange sub-flow path; 4, throttle valve; 5, distributor; 20, installation cavity; 200, water tray; 300, top cover plate; 400, liquid pipe; 500, air pipe; 600, fan. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments 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 application and are not to be construed as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] The air conditioner indoor unit 100 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0035] As shown in FIG. 1 to FIG. 5 , according to an embodiment of the air-conditioning indoor unit 100 of the present application, the air-conditioning indoor unit 100 includes a fan 600 and a heat exchanger 10 .

[0036] Specifically, referring to FIG1 , the fan 600 and the heat exchanger 10 are arranged in a first direction. The heat exchanger 10 includes a plurality of spaced fins 2 and heat exchange tubes 1. The angle between the length direction of the fins 2 and the first direction (direction a as shown in FIG1 ) is an acute angle. There are multiple heat exchange tubes 1, which are passed through the plurality of fins 2. The plurality of heat exchange tubes 1 are connected to form a heat exchange flow path 3. The flow direction of the refrigerant in the heat exchange flow path 3 is the same as the length direction of the fins 2. In cooling mode, the flow direction of the refrigerant in the heat exchange flow path 3 is the same as the wind direction formed by the fan 600. The wind speed formed by the fan 600 gradually increases along the wind direction. The fan 600 is used to increase the air flow speed in the heat exchanger 10. In the examples shown in FIG1-5 , the first direction is the up-down direction, but the present application is not limited thereto. The first direction can also be other directions, such as the left-right direction, the front-back direction, etc.

[0037] In the present application, since the flow velocity increases closer to the fan 600, the refrigerant flow direction in the heat exchange path 3 is the same as the wind direction formed by the fan 600. Therefore, the refrigerant in the heat exchange path 3 flows from the end of the heat exchanger 10 facing away from the fan 600 to the end of the heat exchanger 10 closer to the fan 600. Furthermore, the refrigerant flow direction in the heat exchange path 3 and the wind direction formed by the fan 600 may form an angle, but the angle is less than 90 degrees.

[0038] It can be understood that the fins 2 are multiple and spaced apart in the thickness direction of the fins 2, and the heat exchange tubes 1 are arranged in the multiple fins 2. In the cooling mode, the heat exchange flow path 3 is an evaporation flow path. The refrigerant in the heat exchange flow path 3 flows from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600. As the refrigerant continues to evaporate in the heat exchange flow path 3, the refrigerant dryness gradually increases in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, and the heat transfer coefficient of the refrigerant gradually increases. At the same time, since the closer to the fan 600, the greater the flow rate, the higher the air heat transfer coefficient, therefore, the air heat transfer coefficient gradually increases in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, that is, in the wind direction, so that in the cooling mode, in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, that is, in the wind direction, the change trend of the heat transfer coefficient of the refrigerant is adapted to the change trend of the heat transfer coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger 10 during cooling.

[0039] In addition, the inlet end 31 of the heat exchange flow path 3 and the outlet end 32 of the heat exchange flow path 3 are respectively located at the two ends of the heat exchanger 10 along the length direction of the fin 2, thereby reducing the heat exchange between the inlet end 31 of the heat exchange flow path 3 and the outlet end 32 of the heat exchange flow path 3, thereby further improving the heat exchange efficiency of the heat exchanger 10.

[0040] In addition, the inlet end 31 of the heat exchange flow path 3 is connected to the liquid pipe 400, and the outlet end 32 of the heat exchange flow path 3 is connected to the air pipe 500. In the cooling mode, the flow path of the refrigerant in the heat exchanger 10 is: the liquid-phase refrigerant enters the inlet end 31 of the heat exchange flow path 3 from the liquid pipe 400, and continuously evaporates along the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, forming a gas-phase refrigerant, and finally enters the air pipe 500 through the outlet end 32 of the heat exchange flow path 3 and flows out of the heat exchanger 10.

[0041] For example, in the examples shown in FIG3 to FIG5 , the fan 600 is located at the top, the inlet end 31 of the heat exchange flow path 3 is located at the bottom, and the outlet end 32 of the heat exchange flow path 3 is located at the top.

[0042] According to the heat exchanger 10 of the embodiment of the present application, heat exchange tubes 1 are provided through multiple fins 2, and multiple heat exchange tubes 1 are connected to form a heat exchange flow path 3. In cooling mode, the refrigerant flow direction in the heat exchange flow path 3 is the same as the wind direction formed by the fan 600. The wind speed formed by the fan 600 gradually increases along the wind direction. As a result, in cooling mode, the heat transfer coefficient of the refrigerant and the heat transfer coefficient of the air both gradually increase along the wind direction, thereby making the changing trend of the refrigerant heat transfer coefficient consistent with the changing trend of the air heat transfer coefficient, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0043] In some embodiments of the present application, as shown in Figures 1 to 5, in the heating mode, the flow direction of the refrigerant in the heat exchange flow path 3 is opposite to the wind direction formed by the fan 600, and the wind speed formed by the fan 600 gradually increases along the wind direction.

[0044] It can be understood that, in the heating mode, the wind direction in the present application is also in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600. In the heating mode, the heat exchange flow path 3 is the condensation flow path, the inlet end 31 of the heat exchange flow path 3 is the outlet of the condensation flow path, and the outlet end 32 of the heat exchange flow path 3 is the inlet of the condensation flow path. Therefore, in the heating mode, the refrigerant in the condensation flow path flows from the end of the heat exchanger 10 close to the fan 600 to the end of the heat exchanger 10 away from the fan 600. As the refrigerant continues to condense in the condensation flow path, the refrigerant dryness gradually decreases in the direction from the end of the heat exchanger 10 close to the fan 600 to the end of the heat exchanger 10 away from the fan 600, that is, in the wind direction, and the heat transfer coefficient of the refrigerant shows a trend of gradually decreasing. In other words, at the end of the heat exchanger 10 away from the fan 600, the refrigerant dryness gradually decreases. At the same time, in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, that is, in the wind direction, the air heat transfer coefficient also gradually increases. As a result, in the heating mode, in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, the change trend of the heat transfer coefficient of the refrigerant can also be adapted to the change trend of the heat transfer coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger 10 during heating.

[0045] Therefore, in the heating mode and the cooling mode, the heat transfer coefficient of the refrigerant and the heat transfer coefficient of the air gradually increase in the direction from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 close to the fan 600, that is, in the wind direction, so that the changing trend of the heat transfer coefficient of the refrigerant can be adapted to the changing trend of the heat transfer coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0046] In the heating mode, the flow path of the refrigerant in the heat exchanger 10 is: the gas-phase refrigerant enters the inlet of the condensation flow path from the gas pipe 500, and continuously condenses along the end of the heat exchanger 10 close to the fan 600 to the end of the heat exchanger 10 away from the fan 600 to form a liquid-phase refrigerant, and finally enters the liquid pipe 400 through the outlet of the condensation flow path and flows out of the heat exchanger 10.

[0047] In some embodiments of the present application, as shown in Figure 1, the air-conditioning indoor unit 100 includes a heat exchange air duct, which is formed with an installation cavity 20 and a heat exchange inlet (not shown) and a heat exchange outlet (not shown) connected to the installation cavity 20. The fan 600 is arranged at one end close to the heat exchange outlet, and the heat exchanger 10 is arranged in the installation cavity 20. One end of the heat exchanger 10 is located on one side of the heat exchange inlet, and the other end of the heat exchanger 10 extends toward the direction of the heat exchange outlet and is inclined toward one side of the heat exchange inlet.

[0048] Therefore, in the heat exchanger 10, the air volume passing through the part closer to the heat exchange outlet is greater, which increases the refrigerant heat exchange amount at the heat exchange outlet. At the same time, the closer to the heat exchange outlet, the greater the heat transfer coefficient of the air and the greater the dryness of the refrigerant, thereby further making the changing trend of the heat transfer coefficient of the refrigerant adapt to the changing trend of the heat transfer coefficient of the air, thereby further improving the heat exchange efficiency of the heat exchanger 10.

[0049] In some embodiments of the present application, as shown in Figures 1 and 2 , heat exchange tubes 1 are arranged in a row, with multiple heat exchange tubes 1 spaced apart along the length of the fins 2. The multiple heat exchange tubes 1 are sequentially connected in series along the length of the fins 2 to form a heat exchange path 3 (a condensation path or an evaporation path). It will be appreciated that the arrangement of heat exchange tubes 1 in a row can reduce the width of the fins 2, thereby optimizing the internal space of the heat exchanger 10, contributing to a lighter weight of the heat exchanger 10, and simultaneously simplifying the structure and reducing the cost of the heat exchanger 10.

[0050] In some embodiments of the present application, as shown in Figures 3-5 , the heat exchange tubes 1 are arranged in multiple rows at intervals in the width direction of the fins 2, and each row of heat exchange tubes 1 includes multiple heat exchange tubes 1 arranged at intervals in the length direction of the fins 2. As a result, the refrigerant can flow and exchange heat in the multiple rows of heat exchange tubes 1, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0051] For example, in the example shown in Figure 3, the heat exchange tubes 1 are arranged in two rows at intervals in the width direction of the fin 2. For example, in the example shown in Figure 4, the heat exchange tubes 1 are arranged in three rows at intervals in the width direction of the fin 2. For example, in the example shown in Figure 5, the heat exchange tubes 1 are arranged in four rows at intervals in the width direction of the fin 2. However, the present application is not limited to this. The heat exchange tubes 1 can be arranged in more rows at intervals in the width direction of the fin 2, such as 5 rows, 6 rows, 7 rows or 8 rows, etc.

[0052] In some embodiments of the present application, as shown in FIG3 to FIG5 , the heat exchange flow path 3 includes a plurality of heat exchange sub-flow paths 33 connected in parallel. The number of the plurality of heat exchange sub-flow paths 33 is the same as the number of rows of the heat exchange tubes 1. It can be understood that the plurality of parallel heat exchange sub-flow paths 33 allows the refrigerant to flow in the plurality of heat exchange sub-flow paths 33 at the same time, thereby improving the flow efficiency of the refrigerant, thereby further improving the heat exchange efficiency of the heat exchanger 10.

[0053] Furthermore, as shown in Figures 3-5 , in cooling mode, the heat exchange sub-flow path 33 serves as an evaporation sub-flow path. The refrigerant flow direction within the heat exchange sub-flow path 33 is the same as the wind direction generated by the fan 600, and the wind speed generated by the fan 600 gradually increases along the wind direction. In heating mode, the heat exchange sub-flow path 33 serves as a condensation sub-flow path. The refrigerant flow direction within each condensation sub-flow path is opposite to the wind direction generated by the fan 600. Thus, in both heating and cooling modes, the heat transfer coefficient of the refrigerant in each heat exchange sub-flow path 33 (the condensation sub-flow path or the evaporation sub-flow path) gradually increases with respect to the heat transfer coefficient of the air from the end of the heat exchanger 10 away from the fan 600 to the end of the heat exchanger 10 closer to the fan 600, i.e., in the wind direction. This allows the changing trend of the refrigerant's heat transfer coefficient to align with the changing trend of the air's heat transfer coefficient, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0054] At the same time, as shown in Figures 3 to 5, the inlet end 31 of each heat exchange sub-flow path 33 is arranged at the end of the heat exchanger 10 away from the fan 600, and the outlet end 32 of each heat exchange sub-flow path 33 is arranged at the end of the heat exchanger 10 close to the fan 600. This facilitates the connection between the inlet end 31 of each heat exchange sub-flow path 33 and the liquid pipe 400, and also facilitates the connection between the outlet end 32 of each heat exchange sub-flow path 33 and the air pipe 500, thereby making the connection convenient and the pipeline arrangement simple.

[0055] In some embodiments of the present application, as shown in Figures 3-5 , each heat exchange sub-flow path 33 includes a portion of heat exchange tubes 1 from at least two rows of heat exchange tubes 1. It will be appreciated that, because the heat exchange tubes 1 are arranged in multiple rows spaced apart in the width direction of the fins 2, each heat exchange sub-flow path 33 includes a portion of heat exchange tubes 1 from at least two rows of heat exchange tubes 1. This allows the refrigerant in each heat exchange sub-flow path 33 to exchange heat evenly across the width of the fins 2, thereby ensuring uniform heat exchange in the heat exchanger 10 and improving the efficiency of the heat exchanger 10.

[0056] In some embodiments of the present application, each heat exchange sub-path 33 includes a portion of the heat exchange tubes 1 in the entire row of heat exchange tubes 1, thereby further making the refrigerant in each heat exchange sub-path 33 heat exchange uniformly in the width direction of the fin 2, thereby making the heat exchange of the heat exchanger 10 uniform and improving the efficiency of the heat exchanger 10.

[0057] For example, in the example shown in Figure 3, the heat exchange tubes 1 are arranged in two rows at intervals in the width direction of the fin 2, and each heat exchange sub-flow path 33 includes a portion of the heat exchange tubes 1 in the two rows of heat exchange tubes 1. For example, in the example shown in Figure 4, the heat exchange tubes 1 are arranged in three rows at intervals in the width direction of the fin 2, and each heat exchange sub-flow path 33 includes a portion of the heat exchange tubes 1 in the three rows of heat exchange tubes 1. For example, in the example shown in Figure 5, the heat exchange tubes 1 are arranged in four rows at intervals in the width direction of the fin 2, and each heat exchange sub-flow path 33 includes a portion of the heat exchange tubes 1 in the four rows of heat exchange tubes 1.

[0058] In some embodiments of the present application, as shown in Figures 3-5 , each heat exchange sub-flow path 33 includes the same number of rows of heat exchange tubes 1. This further ensures that the refrigerant in each heat exchange sub-flow path 33 exchanges heat evenly across the width of the fins 2, thereby ensuring uniform heat exchange in the heat exchanger 10 and improving the efficiency of the heat exchanger 10.

[0059] In some embodiments of the present application, as shown in Figures 3 to 5, in the longitudinal direction of the fin 2, the switching positions of the multiple heat exchange sub-flow paths 33 flowing from one row of heat exchange tubes 1 to another row of heat exchange tubes 1 are the same. It can be understood that in the longitudinal direction of the fin 2, when one heat exchange sub-flow path 33 flows from the row of heat exchange tubes 1 in which it is located to the other row of heat exchange tubes 1, the remaining heat exchange sub-flow paths 33 flow from the row of heat exchange tubes 1 in which it is located to the other row of heat exchange tubes 1. As a result, the refrigerant in each heat exchange sub-flow path 33 can be evenly heat exchanged in the longitudinal direction of the fin 2, so that the heat exchange amount in each row of heat exchange tubes is the same, and the subcooling or superheating degree of each heat exchange path is basically the same, thereby making the heat exchange of the heat exchanger 10 uniform and improving the efficiency of the heat exchanger 10.

[0060] For example, in the example shown in Figure 3, there are two heat exchange sub-paths 33, and the heat exchange tubes 1 are in two rows spaced apart along the width direction of the fins 2. When the outer heat exchange sub-path 33 flows from the outer row of heat exchange tubes 1 to the inner row of heat exchange tubes 1, the inner heat exchange sub-path 33 flows from the inner row of heat exchange tubes 1 to the outer row of heat exchange tubes 1.

[0061] In some embodiments of the present application, as shown in Figures 3-5 , in cooling mode, multiple rows of heat exchange tubes 1 in the same heat exchange sub-flow path 33 are sequentially connected in series along the length direction of the fins 2. This simplifies the connection of the heat exchange tubes 1 and improves production efficiency.

[0062] In some embodiments of the present application, as shown in Figures 3-5 , in cooling mode, the inlet ends 31 of multiple heat exchange sub-flow paths 33 are connected to the same distributor 5. It is understood that one end of the distributor 5 is connected to a liquid pipe 400, which has a throttle valve 4. In cooling mode, the throttle valve 4 allows the refrigerant in the liquid pipe 400 to be throttled and cooled. The distributor 5 facilitates evenly distributing the throttled and cooled refrigerant to each heat exchange sub-flow path 33, thereby ensuring uniform heat exchange in the heat exchanger 10 and improving heat exchange efficiency.

[0063] At the same time, the inlet ends 31 of the multiple heat exchange sub-flow paths 33 are connected to the same distributor 5, which is simple in structure and low in cost compared to the inlet ends 31 of the multiple heat exchange sub-flow paths 33 being connected to multiple distributors 5 respectively.

[0064] In some embodiments of the present application, the fin 2 is rectangular, and at least one of the four corners of the fin 2 has a notch. It is understood that having a notch at at least one of the four corners of the fin 2 can reduce the area of ​​the corner, thereby reducing installation interference between the fin 2 and the wall surface of the air conditioner indoor unit 100 and installation interference between the fins 2 of two adjacent heat exchangers 10. This ensures the length of the fin 2, thereby ensuring that there are a sufficient number of heat exchange tubes 1 along the length of the fin 2 in the heat exchanger 10 to ensure heat exchange efficiency. At the same time, the air inlet area of ​​the heat exchanger 10 can be increased, and the inclination angle of the heat exchanger 10 can be reduced, thereby reducing the power of the fan 600 in the air conditioner indoor unit 100.

[0065] In some embodiments of the present application, as shown in Figures 1-5 , there are multiple heat exchangers 10, arranged along a second direction (direction b as shown in Figure 1 ), which is perpendicular to the first direction, and multiple heat exchange paths 3 (condensation paths or evaporation paths) are connected in parallel. It will be appreciated that the parallel connection of multiple heat exchange paths 3 (condensation paths or evaporation paths) allows refrigerant to flow through multiple heat exchange paths 3 (condensation paths or evaporation paths) simultaneously, improving the flow efficiency of the refrigerant, thereby improving the heat exchange efficiency of the multiple heat exchangers 10, and thus improving the operating efficiency of the air conditioner indoor unit 100.

[0066] For example, in the examples shown in Figures 1 to 8, there are four heat exchangers 10 and four heat exchange flow paths 3 (condensation flow paths or evaporation flow paths), but the present application is not limited to this. The heat exchangers 10 and heat exchange flow paths 3 (condensation flow paths or evaporation flow paths) can be more or less, such as 2, 3, 5 or 6, etc.

[0067] In some embodiments of the present application, as shown in Figures 2 to 5, the length directions of the fins 2 of any two adjacent heat exchangers 10 among a plurality of heat exchangers 10 are angled to each other, and any two adjacent heat exchangers 10 are connected along one end of the length direction of the fin 2. When the number of heat exchangers 10 is greater than or equal to three, the two ends of the length direction of the middle heat exchanger 10 among any three adjacent heat exchangers 10 are respectively connected to one end of the length direction of the other two heat exchangers 10.

[0068] It can be understood that the length directions of the fins 2 of any two adjacent heat exchangers 10 among the multiple heat exchangers 10 are at an angle to each other, thereby reducing the overall height of the air-conditioning indoor unit 100, which is beneficial to optimizing the layout of the air-conditioning indoor unit 100. At the same time, the length directions of the fins 2 of any two adjacent heat exchangers 10 among the multiple heat exchangers 10 are at an angle to each other, which can form different shapes between the multiple heat exchangers 10, thereby facilitating adaptation to the internal space of the air-conditioning indoor unit 100 and facilitating the installation of the air-conditioning indoor unit 100.

[0069] For example, in the examples shown in Figures 1 to 5, there are four heat exchangers 10, and the four heat exchangers 10 are arranged in an M shape, that is, along the vertical direction, the two adjacent heat exchangers 10 are inclined in opposite directions, the lower ends of the two middle heat exchangers 10 are connected to each other, and the upper ends of the two middle heat exchangers 10 are respectively connected to the upper ends of the other two heat exchangers 10, but the present application is not limited to this. The number of heat exchangers 10 can be more or less, and multiple heat exchangers 10 can be arranged in an N shape, a W shape, a V shape, etc.

[0070] In some embodiments of the present application, as shown in Figures 2-5 , the fins 2, heat exchange tubes 1, and heat exchange flow paths 3 (condensation flow paths or evaporation flow paths) of multiple heat exchangers 10 are identical. This ensures uniform heat exchange across the multiple heat exchangers 10. Furthermore, the identical fins 2, heat exchange tubes 1, and heat exchange flow paths 3 (condensation flow paths or evaporation flow paths) across the multiple heat exchangers 10 also improve production efficiency and simplify the structure of the air conditioner indoor unit 100.

[0071] In some embodiments of the present application, as shown in Figures 1 to 5, the first direction is the up and down direction, the water receiving tray 200 is located below the heat exchanger 10, and the lower end of the fin 2 is located in the water receiving tray 200. It can be understood that the water receiving tray 200 is located below the heat exchanger 10. The water receiving tray 200 is used to accommodate condensed water on the heat exchanger 10. The condensed water on the surface of the heat exchanger 10 can flow from top to bottom along the length direction of the fin 2 to the water receiving tray 200. At the same time, since the length direction of the fin 2 extends in the vertical direction or the angle between it and the vertical direction is an acute angle, the condensed water can flow from top to bottom along the length direction of the fin 2 to the water receiving tray 200.

[0072] Furthermore, as shown in Figures 1-5 , the distance between the inner wall of the water receiving pan 200 and the heat exchanger 10 is less than 1 cm, such as 0.8 cm, 0.5 cm, 0.3 cm, or 0.1 cm. It will be appreciated that a distance of less than 1 cm between the inner wall of the water receiving pan 200 and the heat exchanger 10 allows the water receiving pan 200 to enclose the upper end of the heat exchanger 10. When the lower end of the heat exchanger 10 has a subcooling section or a superheating section, this prevents the refrigerant in the subcooling flow path 3 from directly heating the air, thereby improving the subcooling and superheating effects.

[0073] Furthermore, as shown in FIG1-5 , the inner wall of the water receiving tray 200 is spaced apart from the heat exchanger 10 , thereby preventing heat transfer between the water receiving tray 200 and the heat exchanger 10 and affecting the operation of the heat exchanger 10 , thereby improving the working efficiency of the heat exchanger 10 .

[0074] In some embodiments of the present application, as shown in Figures 1-5 , the first direction is the up-down direction, and the upper end of the heat exchanger 10 is wrapped with a top cover plate 300. The distance between the sidewall of the top cover plate 300 and the heat exchanger 10 is less than 1 cm, such as 0.8 cm, 0.5 cm, 0.3 cm, or 0.1 cm. As a result, the top cover plate 300 can wrap around the upper end of the heat exchanger 10. Therefore, when the upper end of the heat exchanger 10 has a subcooling section or a superheating section, the refrigerant in the subcooling flow path 3 can be prevented from directly heating the air, thereby improving the subcooling and superheating effects.

[0075] Furthermore, as shown in FIG1-FIG5 , the inner wall of the top cover plate 300 is spaced apart from the heat exchanger 10 , thereby preventing heat transfer between the top cover plate 300 and the heat exchanger 10 and affecting the operation of the heat exchanger 10 , thereby improving the working efficiency of the heat exchanger 10 .

[0076] In some embodiments of the present application, as shown in Figures 1 to 8, the first direction is the up-down direction. When the air conditioning indoor unit 100 is the above-mentioned air conditioning indoor unit 100, the angle between the heat exchanger 10 and the horizontal plane is greater than 45 degrees, for example, the angle can be 45 degrees, 48 ​​degrees, 50 degrees, 53 degrees, 55 degrees, 57 degrees, 60 degrees, 65 degrees, 70 degrees, 73 degrees, 78 degrees, 80 degrees, or 83 degrees. This allows condensed water to flow along the length of the heat exchanger 10 to the water receiving pan 200, catching the condensed water flowing down the heat exchanger 10 and preventing it from dripping into the air duct of the air conditioning indoor unit 100, thereby preventing dripping of the air conditioning indoor unit 100, reducing the possibility of short circuits in components within the air conditioning indoor unit 100, and ensuring the safety of the air conditioning indoor unit 100.

[0077] Throughout this specification, reference to terms such as "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 application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner indoor unit, wherein: The air conditioner indoor unit comprises: a fan and a heat exchanger, wherein the fan and the heat exchanger are arranged in a first direction, and the heat exchanger comprises: A plurality of spaced-apart fins, wherein the angle between the length direction of the fins and the first direction is an acute angle; A heat exchange tube, wherein there are a plurality of heat exchange tubes, the heat exchange tubes are passed through a plurality of the fins, the plurality of heat exchange tubes are connected to form a heat exchange flow path, and the flow direction of the refrigerant in the heat exchange flow path is the same as the length direction of the fins; In the cooling mode, the flow direction of the refrigerant in the heat exchange flow path is the same as the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the wind direction.

2. The air conditioning indoor unit according to claim 1, wherein: In the heating mode, the flow direction of the refrigerant in the heat exchange flow path is opposite to the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the wind direction.

3. The air conditioning indoor unit according to claim 1 or 2, wherein: The air conditioner indoor unit includes a heat exchange air duct, which is formed with an installation cavity and a heat exchange inlet and a heat exchange outlet connected to the installation cavity. The fan is arranged at one end close to the heat exchange outlet, and the heat exchanger is arranged in the installation cavity. One end of the heat exchanger is located on one side of the heat exchange inlet, and the other end of the heat exchanger extends in the direction of the heat exchange outlet and is inclined toward one side of the heat exchange inlet.

4. The air conditioner indoor unit according to any one of claims 1 to 3, wherein: The heat exchange tubes are arranged in a row, and a plurality of the heat exchange tubes are arranged at intervals in the length direction of the fins. The plurality of heat exchange tubes are sequentially connected in series along the length direction of the fins to form the heat exchange flow path.

5. The air conditioner indoor unit according to any one of claims 1 to 4, wherein: The heat exchange tubes are arranged in a plurality of rows at intervals in the width direction of the fins, and each row of the heat exchange tubes includes a plurality of the heat exchange tubes arranged at intervals in the length direction of the fins.

6. The air conditioning indoor unit according to claim 5, wherein: The heat exchange flow path includes a plurality of heat exchange sub-flow paths in parallel, and the number of the plurality of heat exchange sub-flow paths is the same as the number of rows of the heat exchange tubes. In the cooling mode, the flow direction of the refrigerant in the heat exchange sub-flow paths is the same as the wind direction formed by the fan, and the wind speed formed by the fan gradually increases along the wind direction.

7. The air conditioning indoor unit according to claim 6, wherein: Each of the heat exchange sub-flow paths includes a portion of the heat exchange tubes in at least two rows of the heat exchange tubes.

8. The air conditioning indoor unit according to claim 7, wherein: Each of the heat exchange sub-flow paths comprises the same number of rows of heat exchange tubes.

9. The air conditioning indoor unit according to claim 7, wherein: In the length direction of the fin, the switching positions of the plurality of heat exchange sub-flow paths from one row of the heat exchange tubes to another row of the heat exchange tubes are the same.

10. The air conditioning indoor unit according to claim 7, wherein: In the cooling mode, in the length direction of the fins, multiple rows of the heat exchange tubes in the same heat exchange sub-flow path are connected in series in sequence.

11. The air conditioning indoor unit according to claim 6, wherein: In the cooling mode, the inlet ends of the plurality of heat exchange sub-flow paths are connected to the same distributor.

12. The air conditioner indoor unit according to any one of claims 1 to 11, wherein: The fin is rectangular, and at least one of the four corners of the fin has a notch.

13. The air conditioner indoor unit according to any one of claims 1 to 12, wherein: There are multiple heat exchangers, and the multiple heat exchangers are arranged along a second direction, the second direction is perpendicular to the first direction, and the multiple heat exchange paths are connected in parallel.

14. The air conditioning indoor unit according to claim 13, wherein: The length directions of the fins of any two adjacent heat exchangers among the multiple heat exchangers are at an angle to each other, and any two adjacent heat exchangers are connected at one end along the length direction of the fin. When the number of the heat exchangers is greater than or equal to three, the two ends of the length direction of the heat exchanger located in the middle of any three adjacent heat exchangers are respectively connected to one end of the length direction of the other two heat exchangers.

15. The air conditioning indoor unit according to claim 13, wherein: The fins, the heat exchange tubes, and the heat exchange flow paths of the plurality of heat exchangers are the same.

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