Heat exchanger and air conditioner indoor unit

Abstract

The invention discloses a heat exchanger and an air conditioner indoor unit, and the heat exchanger comprises a heat exchange pipe which comprises a supercooling pipe and an evaporation pipe; each fin comprises a first fin part and a second fin part which are arranged in the length direction of the fin, the supercooling pipes are arranged on the first fin parts in a penetrating mode, the evaporation pipes are arranged on the second fin parts in a penetrating mode, the supercooling pipes on the first fin parts are connected to form a supercooling flow path, and the evaporation pipes on the second fin parts are connected to form a heat exchange flow path. In the first mode, a refrigerant flows from the supercooling flow path to the evaporation flow path and the heat exchange flow path, and the outlet end of the heat exchange flow path is located at the end, close to the first fin part, of the second fin part. According to the heat exchanger, the refrigerant at the outlet end of the heat exchange flow path exchanges heat with the refrigerant in the supercooling flow path, the gas-liquid two-phase refrigerant at the outlet end can be conveniently converted into the gas-phase refrigerant, backflow of the refrigerant is reduced, and therefore 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 a heat exchanger and an indoor unit of an air conditioner. Background Art

[0002] In the current heat exchanger, in the refrigerant flow path, sometimes there is still liquid refrigerant that has not been completely evaporated in the outlet, that is, there is gas-liquid two-phase refrigerant in the outlet, which causes serious backflow and leads to a decrease in the performance of the evaporator. 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 a heat exchanger, which can reduce the refrigerant backflow, thereby improving the heat exchange efficiency of the heat exchanger.

[0004] The present invention also provides an air-conditioner indoor unit, comprising the above-mentioned heat exchanger.

[0005] According to an embodiment of the present invention, the heat exchanger includes: a heat exchange tube, the heat exchange tube includes a subcooling tube and an evaporating tube; a plurality of spaced-apart fins, each of the fins includes a first fin portion and a second fin portion arranged in the length direction of the fin, the subcooling tube is passed through the first fin portion, the evaporating tube is passed through the second fin portion, the subcooling tubes on the first fin portion are connected to form a subcooling flow path, and the evaporating tubes on the second fin portion are connected to form a heat exchange flow path, heat can be exchanged between the subcooling flow path and the heat exchange flow path, and in a first mode, the refrigerant flows from the subcooling flow path to the heat exchange flow path, and the outlet end of the heat exchange flow path is located at an end of the second fin portion close to the first fin portion.

[0006] According to the heat exchanger of the embodiment of the present invention, the subcooling tube is arranged on the first fin part, and the evaporation tube is arranged on the second fin part. The subcooling tube on the first fin part is connected to form a subcooling flow path, and the evaporation tube on the second fin part is connected to form a heat exchange flow path. In the first mode, the refrigerant flows from the subcooling flow path to the heat exchange flow path, and the outlet end of the heat exchange flow path is located at one end of the second fin part close to the first fin part. Thus, the outlet end of the heat exchange flow path is adjacent to the subcooling flow path, so that the refrigerant at the outlet end of the heat exchange flow path is convenient for heat exchange with the refrigerant in the subcooling flow path, so that in the first mode, the gas-liquid two-phase refrigerant at the outlet end is convenient for conversion into gas-phase refrigerant, reducing refrigerant reflux, thereby improving the heat exchange efficiency of the heat exchanger.

[0007] In some embodiments of the present invention, in the second mode, the refrigerant flows from the heat exchange flow path to the subcooling flow path, and the inlet end of the heat exchange flow path is located at an end of the second fin portion close to the first fin portion; wherein the refrigerant flow direction of the first mode is opposite to that of the second mode.

[0008] In some embodiments of the present invention, in a first mode, an inlet end of the heat exchange flow path is located at an end of the second fin portion away from the first fin portion, and the refrigerant in the heat exchange flow path flows from an end of the second fin portion away from the first fin portion to an end of the second fin portion close to the first fin portion.

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

[0010] In some embodiments of the present invention, the plurality of heat exchange tubes on the second fin portion are sequentially connected in series along the length direction of the fin to form the heat exchange flow path.

[0011] 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.

[0012] In some embodiments of the present invention, the heat exchange flow path includes a plurality of evaporation sub-flow paths in parallel, the number of the plurality of evaporation sub-flow paths is the same as the number of rows of the heat exchange tubes, and in a first mode, the outlet end of each of the evaporation sub-flow paths is arranged at an end of the second fin portion close to the first fin portion.

[0013] In some embodiments of the present invention, in the first mode, the inlet end of each of the evaporation sub-flow paths is disposed at an end of the second fin portion away from the first fin.

[0014] In some embodiments of the present invention, each of the evaporation 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 invention, each of the evaporation sub-flow paths includes the same number of rows of heat exchange tubes.

[0016] In some embodiments of the present invention, in the length direction of the fin, the switching positions of the plurality of evaporation 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 invention, in the first mode, in the direction from the inlet end to the outlet end of the evaporation sub-flow path, multiple rows of the heat exchange tubes in the same evaporation sub-flow path are connected in series in sequence.

[0018] In some embodiments of the present invention, a throttle valve is provided between the subcooling flow path and the heat exchange flow path, and the throttle valve and the plurality of evaporation sub-flow paths are connected via a distributor.

[0019] 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.

[0020] An air-conditioning indoor unit according to an embodiment of the present invention comprises: the above-mentioned heat exchanger, wherein there are a plurality of the heat exchangers, a plurality of the supercooling flow paths are connected, and a plurality of the heat exchange flow paths are connected in parallel.

[0021] According to the indoor unit of the air conditioner of the embodiment of the present invention, by setting the above-mentioned heat exchanger, the supercooling tube is arranged on the first fin part, the evaporating tube is arranged on the second fin part, the supercooling tube on the first fin part is connected to form a supercooling flow path, and the evaporating tube on the second fin part is connected to form a heat exchange flow path. In the first mode, the refrigerant flows from the supercooling flow path to the heat exchange flow path, and the outlet end of the heat exchange flow path is located at one end of the second fin part close to the first fin part. Thus, the outlet end of the heat exchange flow path is adjacent to the supercooling flow path, so that the refrigerant at the outlet end of the heat exchange flow path is convenient for heat exchange with the refrigerant in the supercooling flow path, so that in the first mode, the gas-liquid two-phase refrigerant at the outlet end is convenient for conversion into gas-phase refrigerant, reducing refrigerant reflux, thereby improving the heat exchange efficiency of the heat exchanger.

[0022] In some embodiments of the present invention, a plurality of the heat exchangers are arranged along a straight line, and the length directions of the fins of any two adjacent heat exchangers among the plurality of the 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.

[0023] In some embodiments of the present invention, the angle between the heat exchanger and the horizontal plane is greater than 45°.

[0024] In some embodiments of the present invention, the subcooling flow paths of the plurality of heat exchangers are located at the same end in a direction perpendicular to an arrangement direction of the plurality of heat exchangers.

[0025] In some embodiments of the present invention, the fins, the heat exchange tubes, the subcooling flow path and the heat exchange flow path of a plurality of the heat exchangers are the same.

[0026] In some embodiments of the present invention, the air-conditioning indoor unit further includes: a water receiving pan, the water receiving pan is located below the heat exchanger, the length direction of the fin extends along the vertical direction or the angle between the fin and the vertical direction is an acute angle, and the subcooling flow path is located above or below the heat exchange flow path.

[0027] In some embodiments of the present invention, the lower end of the fin is located in the water receiving tray, and the distance between the inner wall of the water receiving tray and the heat exchanger is less than 1 cm.

[0028] In some embodiments of the present invention, the upper end of the heat exchanger is wrapped with a top cover plate, and the distance between the side wall of the top cover plate and the heat exchanger is less than 1 cm.

[0029] In some embodiments of the present invention, the air-conditioning indoor unit further includes: a fan, wherein the fan and the heat exchanger are arranged in the up-down direction, the angle between the length direction of the fin and the up-down direction is an acute angle, and the refrigerant flow direction in the heat exchange flow path is the same as the length direction of the fin; in a first 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.

[0030] In some embodiments of the present invention, in the second mode, the refrigerant flow direction 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.

[0031] 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.

[0032] 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

[0033] 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:

[0034] Figure 1 is a cross-sectional view of an indoor unit of an air conditioner according to a first embodiment of the present invention, wherein the subcooling flow path is located above the heat exchange flow path, and the heat exchange tubes are arranged in a row;

[0035] Figure 2 is a partial cross-sectional view of an air conditioner indoor unit according to Embodiment 2 of the present invention, wherein the subcooling flow path is located above the heat exchange flow path, and the heat exchange tubes are arranged in two rows;

[0036] Figure 3 is a partial cross-sectional view of an air conditioner indoor unit according to Embodiment 3 of the present invention, wherein the subcooling flow path is located above the heat exchange flow path, and the heat exchange tubes are arranged in three rows;

[0037] Figure 4is a partial cross-sectional view of an air conditioner indoor unit according to a fourth embodiment of the present invention, wherein the subcooling flow path is located above the heat exchange flow path, and the heat exchange tubes are arranged in four rows;

[0038] Figure 5 is a partial cross-sectional view of an air conditioner indoor unit according to Embodiment 5 of the present invention, wherein the subcooling flow path is located below the heat exchange flow path, and the heat exchange tubes are arranged in one row;

[0039] Figure 6 is a partial cross-sectional view of an air conditioner indoor unit according to Embodiment 6 of the present invention, wherein the subcooling flow path is located below the heat exchange flow path, and the heat exchange tubes are arranged in two rows;

[0040] Figure 7 is a partial cross-sectional view of an indoor unit of an air conditioner according to Embodiment 7 of the present invention, wherein the subcooling flow path is located below the heat exchange flow path, and the heat exchange tubes are arranged in three rows;

[0041] Figure 8 is a partial cross-sectional view of an air conditioner indoor unit according to Embodiment 8 of the present invention, wherein the subcooling flow path is located below the heat exchange flow path, and the heat exchange tubes are arranged in four rows;

[0042] Fig. 9 is a schematic diagram of a flow path of an indoor unit of an air conditioner according to an embodiment of the present invention, wherein the subcooling flow path is located above the heat exchange flow path;

[0043] Fig.10 is a flow path schematic diagram of an air conditioner indoor unit according to another embodiment of the present invention, wherein the subcooling flow path is located below the heat exchange flow path.

[0044] Reference numerals:

[0045] 100. Air conditioner indoor unit;

[0046] 10. Heat exchanger;

[0047] 1. Heat exchange tube; 11. Subcooling tube; 12. Evaporation tube;

[0048] 2. fin; 21. first fin portion; 22. second fin portion; 23. notch;

[0049] 3. Overcooling flow path;

[0050] 4. heat exchange flow path; 41. evaporation sub-flow path; 42. inlet end; 43. outlet end;

[0051] 5. Throttle valve;

[0052] 6. Distributor;

[0053] 20. Installation cavity;

[0054] 200, water tray;

[0055] 300, top cover plate;

[0056] 400. Liquid pipe;

[0057] 500, trachea;

[0058] 600. Fan. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] 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.

[0062] A heat exchanger 10 according to an embodiment of the present invention will be described below with reference to the drawings.

[0063] like Figure 1-Figure 8 As shown, a heat exchanger 10 according to an embodiment of the present invention includes a heat exchange tube 1 and a plurality of spaced-apart fins 2 .

[0064] Specifically, refer to Figure 1-Figure 8The heat exchange tube 1 includes a subcooling tube 11 and an evaporating tube 12. Each fin 2 includes a first fin portion 21 and a second fin portion 22 arranged in the length direction of the fin 2. The subcooling tube 11 is passed through the first fin portion 21, and the evaporating tube 12 is passed through the second fin portion 22. The subcooling tubes 11 on the first fin portion 21 are connected to form a subcooling flow path 3, and the evaporating tubes 12 on the second fin portion 22 are connected to form a heat exchange flow path 4. Heat can be exchanged between the subcooling flow path 3 and the heat exchange flow path 4. In the first mode, the refrigerant flows from the subcooling flow path 3 to the heat exchange flow path 4, and the outlet end 43 of the heat exchange flow path 4 is located at one end of the second fin portion 22 close to the first fin portion 21.

[0065] It can be understood that the fins 2 are multiple and spaced apart along the thickness direction of the fins 2, and the heat exchange tube 1 is inserted into the multiple fins 2. In the first mode, the liquid pipe 400 is connected to the supercooling pipe 11. The liquid pipe 400 contains liquid-phase refrigerant that has been supercooled, and the supercooling flow path 3 is used to cool the supercooled refrigerant again, and then flow from the supercooling flow path 3 to the heat exchange flow path 4, thereby improving the heat exchange efficiency of the heat exchanger 10 and improving the refrigeration effect. The liquid-phase refrigerant continuously evaporates in the heat exchange flow path 4 to form a gas-liquid two-phase refrigerant or a gas-phase refrigerant, and flows to the outlet end 43 of the heat exchange flow path 4. At the same time, the outlet end 43 is connected to the gas pipe 500, so that the refrigerant can flow to the gas pipe 500. In the present invention, the first mode is the refrigeration mode, and the heat exchange flow path 4 is the evaporation flow path.

[0066] Furthermore, if Figure 1-Figure 8 As shown, in the first mode, the outlet end 43 of the heat exchange flow path 4 is located at one end of the second fin portion 22 close to the first fin portion 21, so that the outlet end 43 of the heat exchange flow path 4 is adjacent to the subcooling flow path 3, so that in the first mode, it is convenient for the gas-liquid two-phase refrigerant or the gas-phase refrigerant at the outlet end 43 of the heat exchange flow path 4 to exchange heat with the liquid-phase refrigerant in the subcooling flow path 3. Since the temperature of the liquid-phase refrigerant in the subcooling flow path 3 is higher than the refrigerant at the outlet end 43, the liquid-phase refrigerant in the subcooling flow path 3 can heat the refrigerant at the outlet end 43, so that the liquid-phase refrigerant in the gas-liquid two-phase refrigerant at the outlet end 43 continues to evaporate, so as to facilitate the gas-liquid two-phase refrigerant at the outlet end 43 to be converted into gas-phase refrigerant, thereby reducing the refrigerant reflux, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0067] In the first mode, the flow path of the refrigerant in the heat exchanger 10 is: the liquid refrigerant flows from the liquid pipe 400 to the supercooling flow path 3, the liquid refrigerant is cooled and supercooled in the supercooling flow path 3, and enters the heat exchange flow path 4 for heat exchange, the liquid refrigerant continuously evaporates in the heat exchange flow path 4 to form a gas-liquid two-phase refrigerant or a gas-phase refrigerant, and flows to the outlet end 43 of the heat exchange flow path 4, the refrigerant in the outlet end 43 of the heat exchange flow path 4 exchanges heat with the refrigerant in the supercooling flow path 3, and the refrigerant in the outlet end 43 of the heat exchange flow path 4 is superheated, so that the liquid refrigerant of the gas-liquid two-phase refrigerant in the outlet end 43 of the heat exchange flow path 4 continues to evaporate into a gas-phase refrigerant, and finally flows to the gas pipe 500.

[0068] Among them, in the present invention, the first fin portion 21 and the second fin portion 22 are an integrated part, thereby simplifying the structure and improving the production efficiency.

[0069] According to the heat exchanger 10 of the embodiment of the present invention, the subcooling tube 11 is provided on the first fin part 21, and the evaporation tube 12 is provided on the second fin part 22. The subcooling tube 11 on the first fin part 21 is connected to form a subcooling flow path 3, and the evaporation tube 12 on the second fin part 22 is connected to form a heat exchange flow path 4. In the first mode, the refrigerant flows from the subcooling flow path 3 to the heat exchange flow path 4, and the outlet end 43 of the heat exchange flow path 4 is located at one end of the second fin part 22 close to the first fin part 21. Therefore, the outlet end 43 of the heat exchange flow path 4 is adjacent to the subcooling flow path 3, so that the refrigerant at the outlet end 43 of the heat exchange flow path 4 is convenient for heat exchange with the refrigerant in the subcooling flow path 3, so that in the first mode, the gas-liquid two-phase refrigerant at the outlet end 43 is convenient for conversion into gas-phase refrigerant, reducing the refrigerant reflux, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0070] In some embodiments of the present invention, Figure 1-Figure 8 As shown, in the second mode, the refrigerant flows from the heat exchange flow path 4 to the subcooling flow path 3, and the inlet end of the heat exchange flow path 4 is located at one end of the second fin portion 22 close to the first fin portion 21; wherein the refrigerant flow directions of the first mode and the second mode are opposite.

[0071] It can be understood that, in the present invention, the first mode is a cooling mode, and the second mode is a heating mode, thereby achieving heating of the air-conditioning indoor unit 100 .

[0072] In the second mode, the heat exchange flow path 4 is a condensation flow path, the inlet of the condensation flow path is the outlet end 43 of the heat exchange flow path 4 in the first mode, and the inlet end 42 of the heat exchange flow path 4 is the outlet of the condensation flow path. Therefore, in the first mode, the flow path of the refrigerant in the heat exchanger 10 is: the refrigerant flows from the gas pipe 500 to the inlet of the condensation flow path, and enters the condensation flow path. After heat exchange in the condensation flow path, the refrigerant flows out from the outlet of the condensation flow path, and is subcooled by the subcooling flow path 3, and finally flows to the liquid pipe 400.

[0073] In some embodiments of the present invention, Figure 1-Figure 8 As shown, in the first mode, the inlet end 42 of the heat exchange flow path 4 is located at the end of the second fin portion 22 away from the first fin portion 21, and the refrigerant in the heat exchange flow path 4 flows from the end of the second fin portion 22 away from the first fin portion 21 to the end of the second fin portion 22 close to the first fin portion 21.

[0074] It can be understood that in the first mode, the inlet end 42 of the heat exchange flow path 4 is located at the end of the second fin part 22 away from the first fin part 21, and the outlet end 43 of the heat exchange flow path 4 is located at the end of the second fin part 22 close to the first fin part 21, so that the refrigerant in the heat exchange flow path 4 flows from the end of the second fin part 22 away from the first fin part 21 to the end of the second fin part 22 close to the first fin part 21, so that the heat exchange flow path 4 can cover the second fin part 22 along the length direction of the second fin part 22, thereby improving the efficiency of the heat exchanger 10. At the same time, the inlet end 42 and the outlet end 43 of the heat exchange flow path 4 are respectively located at the two ends of the length direction of the second fin part 22, so that the inlet end 42 and the outlet end 43 of the heat exchange flow path 4 are separated by a long distance, thereby reducing the heat transfer between the refrigerants in the inlet end 42 and the outlet end 43 of the heat exchange flow path 4, and further improving the efficiency of the heat exchanger 10.

[0075] In the first mode, the outlet end 43 of the heat exchange flow path 4 can be located at the upper end of the second fin portion 22, or the outlet end 43 of the heat exchange flow path 4 can be located at the lower end of the second fin portion 22. Figure 1-Figure 4 In the example shown, the first fin portion 21 is arranged near the upper end of the heat exchanger 10 relative to the second fin portion 22, the inlet end 42 of the heat exchange flow path 4 is arranged at the lower end of the second fin portion 22, and the outlet end 43 of the heat exchange flow path 4 is arranged at the upper end of the second fin portion 22. Figure 5-Figure 8 In the example shown, the inlet end 42 of the heat exchange flow path 4 is located at the upper end of the second fin portion 22 , and the outlet end 43 of the heat exchange flow path 4 is located at the lower end of the second fin portion 22 .

[0076] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, 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. 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.

[0077] In some embodiments of the present invention, Figure 1 and Figure 5As shown, the plurality of heat exchange tubes 1 on the second fin portion 22 are sequentially connected in series along the length direction of the fin 2 to form a heat exchange flow path 4. Thus, the heat exchange flow path 4 is one, thereby further optimizing the internal space of the heat exchanger 10, which is beneficial to the lightness of the heat exchanger 10, and at the same time makes the heat exchanger 10 simple in structure and low in cost.

[0078] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 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.

[0079] For example, Figure 2 and Figure 6 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 3 and Figure 7 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 4 and Figure 8 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.

[0080] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 As shown, the heat exchange flow path 4 includes a plurality of evaporation sub-flow paths 41 connected in parallel, and the number of the plurality of evaporation sub-flow paths 41 is the same as the number of rows of the heat exchange tubes 1. It can be understood that the plurality of parallel evaporation sub-flow paths 41 allow the refrigerant to flow in the plurality of evaporation sub-flow paths 41 at the same time, thereby improving the flow efficiency of the refrigerant, thereby further improving the heat exchange efficiency of the heat exchanger 10.

[0081] Furthermore, in the first mode, the outlet end 43 of each evaporation sub-flow path 41 is disposed at one end of the second fin portion 22 close to the first fin portion 21. In the first mode, the heat exchange of the refrigerant in each evaporation sub-flow path is uneven, so that when the refrigerant flows to the outlet end of each evaporation sub-flow path, the outlet end temperature of each evaporation sub-flow path is uneven, and the refrigerant in the outlet end of some evaporation sub-flow paths is not completely volatilized, which is easy to cause backflow, thereby reducing the performance of the heat exchanger. In the first mode, the outlet end 43 of each evaporation sub-flow path 41 is arranged at one end of the second fin portion 22 close to the first fin portion 21, so that the outlet end 43 of each evaporation sub-flow path 41 is adjacent to the supercooling flow path 3, so as to facilitate the heat exchange between the refrigerant at the outlet end 43 of each evaporation sub-flow path 41 and the refrigerant in the supercooling flow path 3. The refrigerant in the outlet end 43 of the evaporation sub-flow path 41 with too low temperature can be heated, so that the liquid refrigerant therein continues to evaporate and reduce reflux. Therefore, the temperature of the refrigerant in the outlet end 43 of each evaporation sub-flow path 41 is balanced, thereby improving the performance of the heat exchanger 10.

[0082] In addition, in the first mode, the heat exchange efficiency of the liquid-phase refrigerant at the outlet end 43 of each evaporator sub-flow path 41 is higher than the heat exchange efficiency of the gas-phase refrigerant at the outlet end 43 of each evaporator sub-flow path 41, so that the supercooling flow path 3 can preferentially exchange heat with the outlet end 43 of the evaporator sub-flow path 41 with liquid-phase refrigerant, thereby further reducing the refrigerant reflux. At the same time, the superheat of the gas-phase refrigerant is not large, that is, the temperature difference of the gas-phase refrigerant after heat exchange is not large, thereby further balancing the temperature of the refrigerant in the outlet end 43 of each evaporator sub-flow path 41, thereby improving the performance of the heat exchanger 10.

[0083] At the same time, in the first mode, the outlet end 43 of each evaporation sub-flow path 41 is arranged at one end of the second fin portion 22 close to the first fin portion 21, which can also facilitate the connection between the outlet end 43 of each evaporation sub-flow path 41 and the air pipe 500, simplifying the connection structure and facilitating the layout and installation of the pipeline.

[0084] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 As shown, in the first mode, the inlet end 42 of each evaporation sub-flow path 41 is arranged at the end of the second fin portion 22 away from the first fin 2. Therefore, in the first mode, it is convenient to connect the inlet end 42 of each evaporation sub-flow path 41 with the liquid pipe 400, simplifying the connection structure and facilitating the arrangement and installation of the pipeline.

[0085] In the first mode, the flow path of the refrigerant in the heat exchanger 10 is as follows: the refrigerant from the liquid pipe 400 is supercooled through the supercooling flow path 3, and then enters each evaporation sub-flow path 41 through the inlet end 42 of each evaporation sub-flow path 41 for heat exchange, and finally flows from the outlet end 43 of each evaporation sub-flow path 41 to the gas pipe 500 and flows out of the heat exchanger 10.

[0086] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 As shown, each evaporation sub-flow path 41 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 evaporation sub-flow path 41 includes part of the heat exchange tubes 1 in at least two rows of heat exchange tubes 1, so that the refrigerant in each evaporation sub-flow path 41 is evenly heat exchanged in the width direction of the fins 2, so that the heat exchange of the heat exchanger 10 is evenly heat exchanged, and the efficiency of the heat exchanger 10 is improved.

[0087] Preferably, each evaporation sub-flow path 41 includes part of the heat exchange tubes 1 in the entire row of heat exchange tubes 1, thereby further making the refrigerant in each evaporation sub-flow path 41 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.

[0088] For example, Figure 2 and Figure 6 In the example shown, the heat exchange tubes 1 are arranged in two rows spaced apart in the width direction of the fin 2, and each evaporation sub-flow path 41 includes part of the heat exchange tubes 1 in the two rows of heat exchange tubes 1, for example, Figure 3 and Figure 7 In the example shown, the heat exchange tubes 1 are arranged in three rows at intervals in the width direction of the fin 2, and each evaporation sub-flow path 41 includes a portion of the heat exchange tubes 1 in the three rows of heat exchange tubes 1, for example, Figure 4 and Figure 8 In 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 evaporation sub-flow path 41 includes a portion of the heat exchange tubes 1 in the four rows.

[0089] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 As shown, each evaporation sub-flow path 41 includes the same number of rows of heat exchange tubes 1. Thus, the refrigerant in each evaporation sub-flow path 41 is further made to exchange heat evenly in the width direction of the fin 2, so that the heat exchanger 10 is evenly exchanged, and the efficiency of the heat exchanger 10 is improved.

[0090] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8As shown, in the length direction of the fin 2 , the switching positions of the multiple evaporation sub-flow paths 41 flowing from one row of heat exchange tubes 1 to another row of heat exchange tubes 1 are the same.

[0091] It can be understood that, in the length direction of the fin 2, when one evaporation sub-flow path 41 flows from a row of heat exchange tubes 1 where it is located to another row of heat exchange tubes 1, the remaining evaporation sub-flow paths 41 flow from a row of heat exchange tubes 1 where they are located to another row of heat exchange tubes 1. As a result, the refrigerant in each evaporation sub-flow path 41 can be evenly heat exchanged in the length 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.

[0092] For example, Figure 2 and Figure 6 In the example shown, there are two evaporation sub-flow paths 41, and the heat exchange tubes 1 are arranged in two rows spaced apart along the width direction of the fins 2. When the outer evaporation sub-flow path 41 flows from the outer row of heat exchange tubes 1 to the inner row of heat exchange tubes 1, the inner evaporation sub-flow path 41 flows from the inner row of heat exchange tubes 1 to the outer row of heat exchange tubes 1.

[0093] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 As shown, in the first mode, multiple rows of heat exchange tubes 1 in the same evaporation sub-flow path 41 are connected in series in the direction from the inlet end 42 to the outlet end 43 of the evaporation sub-flow path 41. Thus, the connection method of the heat exchange tubes 1 is simple, and the production efficiency is improved.

[0094] In some embodiments of the present invention, Figure 1-Figure 8 As shown, a throttle valve 5 is provided between the subcooling flow path 3 and the heat exchange flow path 4 , and the throttle valve 5 and a plurality of evaporation sub-flow paths 41 are connected via a distributor 6 .

[0095] It can be understood that in the first mode, the throttle valve 5 can throttle and cool the refrigerant coming from the subcooling flow path 3, and the distributor 6 can facilitate the even distribution of the refrigerant after throttling and cooling to each evaporation sub-flow path 41, so that the heat exchanger 10 can exchange heat evenly and improve the heat exchange efficiency.

[0096] In the first mode, the flow path of the refrigerant in the heat exchanger 10 is: the refrigerant flows from the liquid pipe 400 to the subcooling flow path 3 for subcooling, the supercooled refrigerant passes through the throttling and cooling effect of the throttle valve 5, then enters each evaporation sub-flow path 41 through the distributor 6, and finally flows out from the gas pipe 500.

[0097] In some embodiments of the present invention, Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the fin 2 is rectangular, and at least one of the four corners of the fin 2 has a notch 23. It can be understood that the notch 23 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 in the air conditioner indoor unit 100 can be reduced.

[0098] For example, Figure 3 , Figure 4 , Figure 7 and Figure 8 In the example shown, four corners of the fin 2 have notches 23 , but the present invention is not limited thereto. Three, two or one of the four corners of the fin 2 may have notches 23 .

[0099] The air conditioner indoor unit 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0100] like Figure 1-Figure 8 As shown, the air-conditioning indoor unit 100 according to the embodiment of the present invention includes the heat exchanger 10 mentioned above.

[0101] Specifically, refer to Figure 1-Figure 8 The heat exchanger 10 is multiple, multiple subcooling flow paths 3 are connected, and multiple heat exchange flow paths 4 are connected in parallel. It can be understood that multiple heat exchange flow paths 4 are connected in parallel, so that the refrigerant can flow in multiple heat exchange flow paths 4 at the same time, improving the flow efficiency of the refrigerant, thereby improving the heat exchange efficiency of the air conditioner indoor unit 100. Multiple subcooling flow paths 3 can be connected in series or in parallel, thereby increasing the connection mode and meeting different structural requirements.

[0102] For example, Figure 1-Figure 8 In the example shown, there are four heat exchangers 10, four heat exchange paths 4, and four subcooling paths 3, and the four subcooling paths 3 are connected in series, but the present invention is not limited to this. The heat exchangers 10, heat exchange paths 4, and subcooling paths 3 can be more or less, such as 2, 3, 5, or 6, etc.

[0103] According to the air conditioner indoor unit 100 of the embodiment of the present invention, by setting the above-mentioned heat exchanger 10, the subcooling tube 11 is passed through the first fin part 21, the evaporation tube 12 is passed through the second fin part 22, the subcooling tube 11 on the first fin part 21 is connected to form a subcooling flow path 3, and the evaporation tube 12 on the second fin part 22 is connected to form a heat exchange flow path 4. In the first mode, the refrigerant flows from the subcooling flow path 3 to the heat exchange flow path 4, and the outlet end 43 of the heat exchange flow path 4 is located at one end of the second fin part 22 close to the first fin part 21. Therefore, the outlet end 43 of the heat exchange flow path 4 is adjacent to the subcooling flow path 3, so that the refrigerant at the outlet end 43 of the heat exchange flow path 4 is convenient for heat exchange with the refrigerant in the subcooling flow path 3, so that in the first mode, the gas-liquid two-phase refrigerant at the outlet end 43 is convenient for conversion into gas-phase refrigerant, reducing refrigerant reflux, and thus improving the heat exchange efficiency of the heat exchanger 10.

[0104] In some embodiments of the present invention, Figure 1-Figure 8 As shown, a plurality of heat exchangers 10 are arranged in a straight line, and the length directions of the fins 2 of any two adjacent heat exchangers 10 among the plurality of heat exchangers 10 form an angle with each other, and any two adjacent heat exchangers 10 are connected at one end along 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.

[0105] 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.

[0106] For example, Figure 1-Figure 8 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.

[0107] In some embodiments of the present invention, Figure 1-Figure 8As shown, the subcooling flow paths 3 of the multiple heat exchangers 10 are located at the same end in a direction perpendicular to the arrangement direction of the multiple heat exchangers 10. It can be understood that one end of the subcooling flow path 3 needs to be connected to the liquid pipe 400, and the other end is connected to the distributor 6. The subcooling flow paths 3 of the multiple heat exchangers 10 are located at the same end in a direction perpendicular to the arrangement direction of the multiple heat exchangers 10, which can facilitate the connection of the subcooling flow paths 3 of the multiple heat exchangers 10 with the liquid pipe 400 and the distributor 6, simplify the connection structure, and facilitate the arrangement and installation of the pipeline.

[0108] In some embodiments of the present invention, Figure 2-Figure 4 and Figure 6-Figure 8 As shown, the fins 2, heat exchange tubes 1, subcooling flow paths 3 and heat exchange flow paths 4 of the multiple heat exchangers 10 are the same. Therefore, the heat exchange of the air conditioner indoor unit 100 is uniform, and the fins 2, heat exchange tubes 1, subcooling flow paths 3 and heat exchange flow paths 4 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.

[0109] In some embodiments of the present invention, Figure 1-Figure 8 As shown, the air conditioner indoor unit 100 further includes: a water receiving tray 200, which is located below the heat exchanger 10, and the length direction of the fin 2 extends along the vertical direction or the angle between the fin 2 and the vertical direction is an acute angle.

[0110] 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. The length direction of the fin 2 extends along the vertical direction or the angle between it and the vertical direction is an acute angle, so that the condensed water can flow from top to bottom along the length direction of the fin 2 to the water receiving tray 200.

[0111] Furthermore, if Fig. 9 and Fig.10 As shown, the subcooling flow path 3 is located above or below the heat exchange flow path 4, so that the subcooling flow path 3 and the heat exchange flow path 4 have different arrangements in the heat exchanger 10 or the air conditioner indoor unit 100, thereby meeting the requirements of air conditioner indoor units 100 with different structures. Figure 1-Figure 4 As shown in Figures 9 and 10 , the subcooling flow path 3 is located above the heat exchange flow path 4. At this time, the first fin portion 21 is arranged near the upper end of the heat exchanger 10 relative to the second fin portion 22, the inlet end 42 of the heat exchange flow path 4 is arranged at the lower end of the second fin portion 22, and the outlet end 43 of the heat exchange flow path 4 is arranged at the upper end of the second fin portion 22. When the subcooling flow path 3 is located above the heat exchange flow path 4, the refrigerant flows from bottom to top in the heat exchange flow path 4, so that the refrigerant at the outlet end 43 of the heat exchange flow path 4 is convenient for heat exchange with the refrigerant in the subcooling flow path 3.

[0112] like Figure 5-Figure 8 and Fig.10 As shown, the subcooling flow path 3 is located below the heat exchange flow path 4, and at this time, the inlet end 42 of the heat exchange flow path 4 is located at the upper end of the second fin portion 22, and the outlet end 43 of the heat exchange flow path 4 is located at the lower end of the second fin portion 22. When the subcooling flow path 3 is located below the heat exchange flow path 4, the refrigerant flows from top to bottom in the heat exchange flow path 4, so that the refrigerant at the outlet end 43 of the heat exchange flow path 4 and the refrigerant in the subcooling flow path 3 can exchange heat.

[0113] In some embodiments of the present invention, Figure 1-Figure 8 As shown, the lower end of the fin 2 is located in the water receiving tray 200, and the distance between the inner wall of the water receiving tray 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 can be understood that the distance between the inner wall of the water receiving tray 200 and the heat exchanger 10 is less than 1 cm, so that the water receiving tray 200 can wrap the upper end of the heat exchanger 10, so that when the subcooling tube 11 is located at the lower end of the heat exchanger 10, the water receiving tray 200 can completely cover the subcooling tube 11, thereby preventing the refrigerant in the subcooling flow path 3 from directly heating the air, thereby improving the subcooling effect.

[0114] Furthermore, if Figure 1-Figure 8 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 .

[0115] In addition, when the subcooling flow path 3 is located below the heat exchange flow path 4, the subcooling flow path 3 is located at the lower end of the heat exchanger 10. Since the lower end of the fin 2 is located in the water receiving pan 200, the subcooling flow path 3 is located in the water receiving pan 200, so that the condensed water in the water receiving pan 200 can exchange heat with the refrigerant in the subcooling flow path 3, thereby further improving the subcooling effect, further improving the heat exchange efficiency of the heat exchanger 10, and improving the working efficiency of the air-conditioning indoor unit 100.

[0116] When the supercooling flow path 3 is located below the heat exchange flow path 4, the supercooling flow path 3 is located at the lower end of the heat exchanger 10, and the outlet end of the heat exchange flow path 4 is located below, so that the condensed water in the water receiving tray 200 can exchange heat with the refrigerant in the outlet end of the heat exchange flow path 4. Since the temperature of the condensed water in the water receiving tray 200 is higher than the gas-liquid two-phase refrigerant in the outlet end 43 of each heat exchange flow path 4 and each evaporation sub-flow path 41, the condensed water can heat the gas-liquid two-phase refrigerant in the outlet end 43, thereby facilitating the continued volatilization of the liquid refrigerant in the gas-liquid two-phase refrigerant in the outlet end 43, thereby reducing the refrigerant reflux.

[0117] At the same time, since the temperature of the condensed water in the water receiving tray 200 is lower than the gas-phase refrigerant in the outlet end 43, the gas-phase refrigerant in the outlet end 43 can be cooled to avoid premature overheating of the gas-phase refrigerant in the outlet end 43, thereby further making the refrigerant temperature in the outlet end 43 of each heat exchange flow path 4 and each evaporation sub-flow path 41 uniform, thereby improving the heat exchange efficiency of the heat exchanger.

[0118] In some embodiments of the present invention, Figure 1-Figure 8 As shown, 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 is received to prevent the condensed water from dripping into the air duct of the air conditioner indoor unit 100, thereby preventing the air conditioner indoor unit 100 from dripping, reducing the short circuit of the components in the air conditioner indoor unit 100, and ensuring the safety of the air conditioner indoor unit 100.

[0119] In some embodiments of the present invention, Figure 1-Figure 8 As shown, 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 subcooling tube 11 is located at the upper end of the heat exchanger 10, the top cover plate 300 can completely cover the subcooling tube 11, thereby preventing the refrigerant in the subcooling flow path 3 from directly heating the air and improving the subcooling effect.

[0120] Furthermore, if Figure 1-Figure 8 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 .

[0121] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the air-conditioning indoor unit 100 also includes: a fan 600, which is arranged in the up-down direction with the heat exchanger 10, the angle between the length direction of the fin 2 and the up-down direction is an acute angle, and the refrigerant flow direction in the heat exchange flow path 3 is the same as the length direction of the fin 2; in the first mode, the refrigerant flow direction 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.

[0122] The fan 600 is used to speed up the air flow speed in the heat exchanger 10. In the present invention, since the closer to the fan 600, the greater the flow speed, the refrigerant flow direction in the heat exchange flow path 3 is the same as the wind direction formed by the fan 600, 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. In addition, the refrigerant flow direction in the heat exchange flow path 3 and the wind direction formed by the fan 600 may form an angle, but the angle is less than 90 degrees.

[0123] 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 first mode (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, Since the closer to the fan 600, the greater the flow rate, the higher the air heat exchange coefficient, 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. As a result, 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 exchange coefficient of the refrigerant 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.

[0124] In some embodiments of the present invention, Figure 1-Figure 4 As shown, in the second mode, the refrigerant flow direction 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.

[0125] It can be understood that in the second mode (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, 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. 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.

[0126] Therefore, in the first mode and the second 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 heat transfer coefficient of the refrigerant and the heat transfer coefficient of the air gradually increase, 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat exchanger, It is characterized in that include: Heat exchange tubes, the heat exchange tubes comprising subcooling tubes and evaporation tubes; A fin, wherein the fin comprises a first fin portion and a second fin portion arranged in the length direction of the fin, the subcooling tube is provided on the first fin portion, the evaporating tube is provided on the second fin portion, the subcooling tube on the first fin portion is connected to form a subcooling flow path, and the evaporating tube on the second fin portion is connected to form a heat exchange flow path, and heat can be exchanged between the subcooling flow path and the heat exchange flow path; In the first mode, the refrigerant flows from the subcooling flow path to the heat exchange flow path, and the outlet end of the heat exchange flow path is located at an end of the second fin portion close to the first fin portion.

2. The heat exchanger according to claim 1, It is characterized in that In the second mode, the refrigerant flows from the heat exchange flow path to the subcooling flow path, and the inlet end of the heat exchange flow path is located at an end of the second fin part close to the first fin part; wherein the refrigerant flow directions of the first mode and the second mode are opposite.

3. The heat exchanger according to claim 1, It is characterized in that In the first mode, the inlet end of the heat exchange flow path is located at the end of the second fin portion away from the first fin portion, and the refrigerant in the heat exchange flow path flows from the end of the second fin portion away from the first fin portion to the end of the second fin portion close to the first fin portion.

4. The heat exchanger 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.

5. The heat exchanger according to claim 4, It is characterized in that The plurality of heat exchange tubes on the second fin portion are sequentially connected in series along the length direction of the fin to form the heat exchange flow path.

6. The heat exchanger 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.

7. The heat exchanger according to claim 6, It is characterized in that The heat exchange flow path includes a plurality of evaporation sub-flow paths in parallel, the number of the plurality of evaporation sub-flow paths is the same as the number of rows of the heat exchange tubes, and in the first mode, the outlet end of each of the evaporation sub-flow paths is arranged at an end of the second fin portion close to the first fin portion.

8. The heat exchanger according to claim 7, It is characterized in that In the first mode, the inlet end of each of the evaporation sub-flow paths is arranged at an end of the second fin portion away from the first fin.

9. The heat exchanger according to claim 7 or 8, It is characterized in that Each of the evaporation sub-flow paths includes a portion of the heat exchange tubes in at least two rows of the heat exchange tubes.

10. The heat exchanger according to claim 9, It is characterized in that Each of the evaporation sub-flow paths includes the same number of rows of heat exchange tubes.

11. The heat exchanger according to claim 10, It is characterized in that In the length direction of the fin, the switching positions of the plurality of evaporation sub-flow paths from one row of the heat exchange tubes to another row of the heat exchange tubes are the same.

12. The heat exchanger according to claim 9, It is characterized in that In the first mode, in the direction from the inlet end to the outlet end of the evaporation sub-flow path, the multiple rows of heat exchange tubes in the same evaporation sub-flow path are connected in series in sequence.

13. The heat exchanger according to claim 7, It is characterized in that A throttle valve is provided between the subcooling flow path and the heat exchange flow path, and the throttle valve and the plurality of evaporation sub-flow paths are connected via a distributor.

14. The heat exchanger 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.

15. An air conditioner indoor unit, It is characterized in that include: According to any one of claims 1 to 14, there are multiple heat exchangers, multiple subcooling flow paths are connected, and multiple heat exchange flow paths are connected in parallel.

16. The air conditioner indoor unit according to claim 15, It is characterized in that The plurality of heat exchangers are arranged in a straight line, and the length directions of the fins of any two adjacent heat exchangers among the plurality of 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.

17. The air conditioner indoor unit according to claim 16, It is characterized in that The angle between the heat exchanger and the horizontal plane is greater than 45°.

18. The air conditioner indoor unit according to claim 15, It is characterized in that The subcooling flow paths of the plurality of heat exchangers are located at the same end in a direction perpendicular to an arrangement direction of the plurality of heat exchangers.

19. The air conditioner indoor unit according to claim 15, It is characterized in that The fins, the heat exchange tubes, the subcooling flow path and the heat exchange flow path of the plurality of heat exchangers are the same.

20. The air conditioner indoor unit according to claim 15, It is characterized in that Also includes: A water receiving tray is located below the heat exchanger, the length direction of the fin extends along the vertical direction or the angle between the fin and the vertical direction is an acute angle, and the subcooling flow path is located above or below the heat exchange flow path.

21. The air conditioner indoor unit according to claim 20, It is characterized in that The lower end of the fin is located in the water receiving tray, and the distance between the inner wall of the water receiving tray and the heat exchanger is less than 1 cm.

22. The air conditioner indoor unit according to claim 15, It is characterized in that The upper end of the heat exchanger is wrapped with a top cover plate, and the distance between the side wall of the top cover plate and the heat exchanger is less than 1 cm.

23. The air conditioner indoor unit according to claim 15, It is characterized in that Also includes: A fan, wherein the fan and the heat exchanger are arranged in the up-down direction, the angle between the length direction of the fin and the up-down direction is an acute angle, and the flow direction of the refrigerant in the heat exchange flow path is the same as the length direction of the fin; In the first 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.

24. The air conditioner indoor unit according to claim 23, It is characterized in that In the second mode, the refrigerant flow direction 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.

25. The air conditioning indoor unit according to claim 23 or 24, 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.

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