Indoor unit of air conditioner

Abstract

The air conditioner indoor unit comprises a draught fan and a heat exchanger, the draught fan and the heat exchanger are arranged in the first direction, the heat exchanger comprises a plurality of spaced fins, and the included angle between the length direction of the fins and the first direction is an acute angle; the multiple heat exchange pipes are arranged on the multiple fins in a penetrating mode, the multiple heat exchange pipes are connected to form a heat exchange flow path, and the flow direction of a refrigerant in the heat exchange flow path is the same as the length direction of the fins; and in the refrigeration 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 is gradually increased in the wind direction. According to the heat exchanger, in the refrigeration mode, the heat exchange coefficient of the refrigerant and the heat exchange coefficient of the air are gradually increased in the wind direction, and therefore the change trend of the heat exchange coefficient of the refrigerant can adapt to the change trend of the heat exchange coefficient of the air, and the heat exchange efficiency of the heat exchanger can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to an indoor unit of an air conditioner. Background Art

[0002] 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. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an air conditioner indoor unit, wherein the heat exchanger makes the variation trend of the heat exchange coefficient of the refrigerant adapt to the variation trend of the heat exchange coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger.

[0004] According to an embodiment of the present invention, the air-conditioning 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 fins, wherein the angle between the length direction of the fin and the first direction is an acute angle; a heat exchange tube, wherein there are a plurality of heat exchange tubes, wherein the heat exchange tubes are passed through a plurality of the fins, and the plurality of heat exchange tubes are connected to form a heat exchange flow path, wherein the flow direction of the refrigerant in the heat exchange flow path is the same as the length direction of the fins; in a 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.

[0005] According to the indoor unit of the air conditioner of the embodiment of the present invention, the heat exchange tube is passed through a plurality of fins, and the plurality of heat exchange tubes are connected to form a heat exchange flow path. 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. As a result, in the cooling mode, the heat exchange coefficient of the refrigerant and the heat exchange coefficient of the air gradually increase along the wind direction, so that the change trend of the heat exchange coefficient of the refrigerant can be adapted to the change trend of the heat exchange coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger.

[0006] In some embodiments of the present invention, 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.

[0007] In some embodiments of the present invention, the air conditioner indoor unit includes a heat exchange air duct, the heat exchange air 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 in the direction of the heat exchange outlet and is inclined toward one side of the heat exchange inlet.

[0008] In some embodiments of the present invention, the heat exchange tubes are in a row, a plurality of the heat exchange tubes are arranged at intervals in the length direction of the fins, and the plurality of the heat exchange tubes are sequentially connected in series along the length direction of the fins to form the heat exchange flow path.

[0009] In some embodiments of the present invention, 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.

[0010] In some embodiments of the present invention, 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 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.

[0011] In some embodiments of the present invention, 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.

[0012] In some embodiments of the present invention, each of the heat exchange sub-flow paths comprises the same number of rows of heat exchange tubes.

[0013] In some embodiments of the present invention, 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.

[0014] In some embodiments of the present invention, in a cooling mode, multiple rows of the heat exchange tubes in the same heat exchange sub-flow path are connected in series in sequence in the length direction of the fins.

[0015] In some embodiments of the present invention, in cooling mode, the inlet ends of the plurality of heat exchange sub-flow paths are connected to the same distributor.

[0016] In some embodiments of the present invention, the fin is rectangular, and at least one of the four corners of the fin has a notch.

[0017] In some embodiments of the present invention, 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.

[0018] In some embodiments of the present invention, 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.

[0019] In some embodiments of the present invention, the fins, the heat exchange tubes, and the heat exchange flow paths of a plurality of the heat exchangers are the same.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention, wherein the heat exchange tubes are arranged in a row;

[0023] Figure 2 is a partial cross-sectional view of an indoor unit of an air conditioner according to a first embodiment of the present invention, wherein the heat exchange tubes are arranged in a row;

[0024] Figure 3 is a partial cross-sectional view of an air conditioner indoor unit according to a second embodiment of the present invention, wherein the heat exchange tubes are arranged in two rows;

[0025] Figure 4 is a partial cross-sectional view of an air conditioner indoor unit according to Embodiment 3 of the present invention, wherein the heat exchange tubes are arranged in three rows;

[0026] Figure 5 It is a partial cross-sectional view of an air-conditioning indoor unit according to a fourth embodiment of the present invention, wherein the heat exchange tubes are arranged in four rows.

[0027] Reference numerals:

[0028] 100. Air conditioner indoor unit;

[0029] 10. Heat exchanger;

[0030] 1. Heat exchange tube;

[0031] 2. Fins;

[0032] 3. heat exchange flow path; 31. inlet end; 32. outlet end; 33. heat exchange sub-flow path;

[0033] 4. Throttle valve;

[0034] 5. Distributor;

[0035] 20. Installation cavity;

[0036] 200, water tray;

[0037] 300, top cover plate;

[0038] 400. Liquid pipe;

[0039] 500, trachea;

[0040] 600. Fan. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The air conditioner indoor unit 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0045] like Figure 1-Figure 5As shown, according to the air-conditioning indoor unit 100 of the embodiment of the present invention, the air-conditioning indoor unit 100 includes a fan 600 and a heat exchanger 10 .

[0046] Specifically, refer to Figure 1 The fan 600 and the heat exchanger 10 are arranged in the first direction, and the heat exchanger 10 includes a plurality of spaced fins 2 and a heat exchange tube 1. The length direction of the fin 2 is in the first direction (eg Figure 1 The angle between the heat exchange tubes 1 and the fins 2 is an acute angle. There are multiple heat exchange tubes 1, and the heat exchange tubes 1 are arranged on multiple fins 2. The multiple 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 the 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. Along the wind direction, the wind speed formed by the fan 600 gradually increases. The fan 600 is used to speed up the air flow speed in the heat exchanger 10. Figure 1-Figure 5 In the example shown, the first direction is the up-down direction, but the present invention is not limited thereto, and the first direction may also be other directions, such as the left-right direction, the front-back direction, and the like.

[0047] In the present invention, since the flow velocity increases as the air moves closer to the fan 600, the flow direction of the refrigerant in the heat exchange path 3 is the same as the wind direction formed by the fan 600, and the refrigerant in the heat exchange 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. In addition, the flow direction of the refrigerant 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.

[0048] 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, and 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 shows a trend of gradually increasing. At the same time, due to the increasing The greater the flow rate is near the fan 600, the higher the air heat exchange coefficient is. Therefore, the air heat exchange 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. Therefore, in the cooling mode, the change trend of the heat exchange coefficient of the refrigerant 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, is consistent with the change trend of the heat exchange coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger 10 during cooling.

[0049] 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.

[0050] 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 evaporates continuously along 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 to form 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.

[0051] For example, Figure 3-Figure 5 In the example shown, 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.

[0052] According to the heat exchanger 10 of the embodiment of the present invention, the heat exchange tubes 1 are passed through the multiple fins 2, and the multiple heat exchange tubes 1 are connected to form a heat exchange flow path 3. In the 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, and the wind speed formed by the fan 600 gradually increases along the wind direction. Therefore, in the cooling mode, the heat exchange coefficient of the refrigerant and the heat exchange coefficient of the air gradually increase along the wind direction, so that the change trend of the heat exchange coefficient of the refrigerant can be adapted to the change trend of the heat exchange coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0053] In some embodiments of the present invention, Figure 1-Figure 5 As shown, 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.

[0054] It can be understood that, in the heating mode, the wind direction in the present invention 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 a 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. 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 dryness of the refrigerant gradually increases, and the heat transfer coefficient of the refrigerant shows a trend of gradually increasing. 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 heat transfer coefficient of the air 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.

[0055] 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.

[0056] In the heating mode, the flow path of the refrigerant in the heat exchanger 10 is as follows: 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.

[0057] In some embodiments of the present invention, Figure 1 As shown, the air conditioner 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 in the direction of the heat exchange outlet and is inclined toward one side of the heat exchange inlet.

[0058] Therefore, in the heat exchanger 10, the air volume passing through the part closer to the heat exchange outlet is larger, thereby increasing 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.

[0059] In some embodiments of the present invention, Figure 1 and Figure 2 As described, the heat exchange tubes 1 are arranged in a row, and a plurality of heat exchange tubes 1 are arranged at intervals in the length direction of the fins 2. The plurality of heat exchange tubes 1 are sequentially connected in series along the length direction of the fins 2 to form a heat exchange flow path 3 (condensation flow path or evaporation flow path). It can be understood that the heat exchange tubes 1 are arranged in a row so that the width of the fins 2 is small, thereby optimizing the internal space of the heat exchanger 10, which is conducive to the lightweight of the heat exchanger 10, and at the same time makes the heat exchanger 10 simple in structure and low in cost.

[0060] In some embodiments of the present invention, Figure 3-Figure 5 As shown, 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. Thus, 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.

[0061] For example, Figure 3 In the example shown, the heat exchange tubes 1 are arranged in two rows spaced apart in the width direction of the fins 2, for example Figure 4 In the example shown, the heat exchange tubes 1 are arranged in three rows at intervals in the width direction of the fins 2, for example Figure 5 In the example shown, the heat exchange tubes 1 are arranged in four rows at intervals in the width direction of the fins 2, but the present invention is not limited to this. The heat exchange tubes 1 can be arranged in more rows at intervals in the width direction of the fins 2, such as 5 rows, 6 rows, 7 rows or 8 rows.

[0062] In some embodiments of the present invention, Figure 3-Figure 5 As shown, the heat exchange flow path 3 includes a plurality of heat exchange sub-flow paths 33 connected in parallel, and 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 heat exchange sub-flow paths 33 connected in parallel allow 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.

[0063] Furthermore, if Figure 3-Figure 5As shown, in the cooling mode, the heat exchange sub-flow path 33 is an evaporation sub-flow path, and the flow direction of the refrigerant in the heat exchange sub-flow path 33 is the same as the wind direction formed by the fan 600. Along the wind direction, the wind speed formed by the fan 600 gradually increases. In the heating mode, the heat exchange sub-flow path 33 is a condensation sub-flow path, and the flow direction of the refrigerant in each condensation sub-flow path is opposite to the wind direction formed by the fan 600. Therefore, in the heating mode and 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 direction of the wind direction, the heat exchange coefficient of the refrigerant in each heat exchange sub-flow path 33 (condensation sub-flow path or evaporation sub-flow path) and the heat exchange coefficient of the air are gradually increased, so that the change trend of the heat exchange coefficient of the refrigerant can be adapted to the change trend of the heat exchange coefficient of the air, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0064] At the same time, if Figure 3-Figure 5 As shown, 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. Therefore, it is convenient to connect the inlet end 31 of each heat exchange sub-flow path 33 with the liquid pipe 400, and also convenient to connect the outlet end 32 of each heat exchange sub-flow path 33 with the air pipe 500, so that the connection is convenient and the pipeline arrangement is simple.

[0065] In some embodiments of the present invention, Figure 3-Figure 5 As shown, each heat exchange sub-flow path 33 includes part of the heat exchange tubes 1 in at least two rows of heat exchange tubes 1. It can be understood that, since the heat exchange tubes 1 are arranged in multiple rows at intervals in the width direction of the fins 2, each heat exchange sub-flow path 33 includes part of the heat exchange tubes 1 in at least two rows of heat exchange tubes 1, so that the refrigerant in each heat exchange sub-flow path 33 is evenly heat exchanged in the width direction of the fins 2, so that the heat exchanger 10 is evenly heat exchanged, and the efficiency of the heat exchanger 10 is improved.

[0066] Preferably, each heat exchange sub-flow 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-flow 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.

[0067] For example, Figure 3 In the example shown, the heat exchange tubes 1 are arranged in two rows spaced apart in the width direction of the fins 2, and each heat exchange sub-flow path 33 includes part of the heat exchange tubes 1 in the two rows of heat exchange tubes 1, for example, Figure 4 In the example shown, the heat exchange tubes 1 are arranged in three rows at intervals in the width direction of the fins 2, and each heat exchange sub-flow path 33 includes part of the heat exchange tubes 1 in the three rows of heat exchange tubes 1, for example, Figure 5In the example shown, the heat exchange tubes 1 are arranged in four rows at intervals in the width direction of the fins 2 , and each heat exchange sub-flow path 33 includes a portion of the heat exchange tubes 1 in the four rows.

[0068] In some embodiments of the present invention, Figure 3-Figure 5 As shown, each heat exchange sub-flow path 33 includes the same number of rows of heat exchange tubes 1. Thus, the refrigerant in each heat exchange sub-flow path 33 is further made to exchange heat uniformly in the width direction of the fin 2, so that the heat exchanger 10 is made to exchange heat uniformly and the efficiency of the heat exchanger 10 is improved.

[0069] In some embodiments of the present invention, Figure 3-Figure 5 As shown, in the length 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 length direction of the fin 2, when one heat exchange sub-flow path 33 flows from the row of heat exchange tubes 1 where it is located to another row of heat exchange tubes 1, the remaining heat exchange sub-flow paths 33 flow from the row of heat exchange tubes 1 where it is located to another row of heat exchange tubes 1, thereby, the refrigerant in each heat exchange sub-flow path 33 can be evenly heat exchanged in the length direction of the fin 2, so that the heat exchange amount in each row of heat exchange tubes is the same, and at the same time, the subcooling or superheating of each heat exchange flow path is basically the same, so that the heat exchange of the heat exchanger 10 is uniform, and the efficiency of the heat exchanger 10 is improved.

[0070] For example, Figure 3 In the example shown, there are two heat exchange sub-flow 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-flow 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-flow path 33 flows from the inner row of heat exchange tubes 1 to the outer row of heat exchange tubes 1.

[0071] In some embodiments of the present invention, Figure 3-Figure 5 As shown, in the cooling mode, multiple rows of heat exchange tubes 1 in the same heat exchange sub-flow path 33 are connected in series in sequence in the length direction of the fin 2. Thus, the connection method of the heat exchange tubes 1 is simple, and the production efficiency is improved.

[0072] In some embodiments of the present invention, Figure 3-Figure 5 As shown, in the cooling mode, the inlet ends 31 of the multiple heat exchange sub-flow paths 33 are connected to the same distributor 5. It can be understood that one end of the distributor 5 is connected to the liquid pipe 400, and the liquid pipe 400 has a throttle valve 4. In the cooling mode, the throttle valve 4 can throttle and cool the refrigerant in the liquid pipe 400, and the distributor 5 can facilitate the refrigerant after throttling and cooling to be evenly distributed to each heat exchange sub-flow path 33, so that the heat exchange of the heat exchanger 10 can be uniform and the heat exchange efficiency can be improved.

[0073] 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 has a simple structure and low cost compared to the inlet ends 31 of the multiple heat exchange sub-flow paths 33 being connected to multiple distributors 5 respectively.

[0074] In some embodiments of the present invention, the fin 2 is rectangular, and at least one of the four corners of the fin 2 has a notch. It is understandable that the notch at at least one of the four corners of the fin 2 can reduce the area of ​​the corner, thereby reducing the installation interference between the fin 2 and the wall of the air conditioner indoor unit 100 and the installation interference between the fins 2 of two adjacent heat exchangers 10, ensuring the length of the fin 2, thereby ensuring that there are enough heat exchange tubes 1 in the heat exchanger 10 along the length direction of the fin 2 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, so that the power of the fan 600 in the air conditioner indoor unit 100 can be reduced.

[0075] In some embodiments of the present invention, Figure 1-Figure 5 As shown, there are multiple heat exchangers 10, and the multiple heat exchangers 10 are arranged along the second direction (such as Figure 1 The second direction is perpendicular to the first direction, and multiple heat exchange paths 3 (condensation paths or evaporation paths) are connected in parallel. It can be understood that multiple heat exchange paths 3 (condensation paths or evaporation paths) are connected in parallel, so that the refrigerant can flow in multiple heat exchange paths 3 (condensation paths or evaporation paths) at the same time, which improves the flow efficiency of the refrigerant, thereby improving the heat exchange efficiency of multiple heat exchangers 10, thereby improving the working efficiency of the air conditioner indoor unit 100.

[0076] For example, Figure 1-Figure 5 In the example shown, there are four heat exchangers 10 and four heat exchange paths 3 (condensation paths or evaporation paths), but the present invention is not limited to this. The heat exchangers 10 and the heat exchange paths 3 (condensation paths or evaporation paths) can be more or less, such as 2, 3, 5 or 6, etc.

[0077] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the length directions of the fins 2 of any two adjacent heat exchangers 10 among the multiple heat exchangers 10 form an angle with 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 the 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.

[0078] 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, so that the overall height of the air-conditioning indoor unit 100 is reduced, 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, so that different shapes can be formed between the multiple heat exchangers 10, which is beneficial to adapt to the internal space of the air-conditioning indoor unit 100 and facilitate the installation of the air-conditioning indoor unit 100.

[0079] For example, Figure 1-Figure 5 In the example shown, 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 invention is not limited to this, and the number of heat exchangers 10 can be more or less, and the multiple heat exchangers 10 can be arranged in an N shape, a W shape, a V shape, etc.

[0080] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the fins 2, heat exchange tubes 1, and heat exchange paths 3 (condensation paths or evaporation paths) of the multiple heat exchangers 10 are the same. Thus, the heat exchange of the multiple heat exchangers 10 is uniform. At the same time, the fins 2, heat exchange tubes 1, and heat exchange paths 3 (condensation paths or evaporation paths) of the multiple heat exchangers 10 are the same, which is also conducive to improving production efficiency and simplifying the structure of the air conditioner indoor unit 100.

[0081] In some embodiments of the present invention, Figure 1-Figure 5 As shown, 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, and 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.

[0082] Furthermore, if Figure 1-Figure 5As shown, 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, etc. It can be understood that the distance between the inner wall of the water receiving pan 200 and the heat exchanger 10 is less than 1 cm, so that the water receiving pan 200 can wrap the upper end of the heat exchanger 10. When the lower end of the heat exchanger 10 has a supercooling section or a superheating section, the refrigerant in the supercooling flow path 3 can be prevented from directly heating the air, thereby improving the supercooling effect and the superheating effect.

[0083] Furthermore, if Figure 1-Figure 5 As shown, the inner wall of the water receiving pan 200 is spaced apart from the heat exchanger 10 , thereby preventing heat transfer between the water receiving pan 200 and the heat exchanger 10 and affecting the operation of the heat exchanger 10 , thereby improving the operating efficiency of the heat exchanger 10 .

[0084] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the first direction is the up-down direction, the upper end of the heat exchanger 10 is wrapped with a top cover plate 300, and the distance between the side wall 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, etc. Thus, the top cover plate 300 can wrap the upper end of the heat exchanger 10, so that when the upper end of the heat exchanger 10 has a supercooling section or a superheating section, the refrigerant in the supercooling flow path 3 can be prevented from directly heating the air, thereby improving the supercooling effect and the superheating effect.

[0085] Furthermore, if Figure 1-Figure 5 As shown, 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 operating efficiency of the heat exchanger 10 .

[0086] In some embodiments of the present invention, Figure 1-Figure 5 As shown, 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°, for example, the angle may be 45°, 48°, 50°, 53°, 55°, 57°, 60°, 65°, 70°, 73°, 78°, 80° or 83°. Thus, the condensed water can flow to the water receiving pan 200 along the length direction of the heat exchanger 10, and the condensed water flowing down from the heat exchanger 10 can be received to prevent the condensed water from dripping into the air duct of the air-conditioning indoor unit 100, thereby preventing the air-conditioning indoor unit 100 from dripping, reducing the short circuit of the components in the air-conditioning indoor unit 100, and ensuring the safety of the air-conditioning indoor unit 100.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner indoor unit, It is characterized in that 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 conditioner indoor unit according to claim 1, It is characterized in that 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, It is characterized in that 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 claim 1, It is characterized in that 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 claim 1, It is characterized in that 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 conditioner indoor unit according to claim 5, It is characterized in that 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 conditioner indoor unit according to claim 6, It is characterized in that 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 conditioner indoor unit according to claim 7, It is characterized in that Each of the heat exchange sub-flow paths comprises the same number of rows of heat exchange tubes.

9. The air conditioner indoor unit according to claim 7, It is characterized in that 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 conditioner indoor unit according to claim 7, It is characterized in that 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 conditioner indoor unit according to claim 6, It is characterized in that 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 claim 1, It is characterized in that 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 claim 1, It is characterized in that 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 conditioner indoor unit according to claim 13, It is characterized in that 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 conditioner indoor unit according to claim 13, It is characterized in that 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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