Shunting design method for heat exchanger of indoor unit of air conditioner

Abstract

The invention provides a shunting design method for a heat exchanger of an air conditioner indoor unit, relates to the technical field of household appliances, and is used for solving the problem that the heat exchange efficiency of the heat exchanger is poorer. The shunting design method comprises the following steps: establishing a finite element model of the heat exchanger, and determining a flow velocity distribution cloud picture according to the finite element model; establishing a plurality of wind speed monitoring points; any heat exchange tube is provided with a group of wind speed monitoring points, and the group of monitoring points comprises a plurality of wind speed monitoring points which are arranged at intervals in the first direction; acquiring wind speed values of the plurality of monitoring points according to the flow velocity distribution cloud picture; according to the wind speed values of the multiple monitoring points, the average wind speed value of each set of monitoring points on the multiple heat exchange pipes is obtained; and according to the average wind speed value of each group of monitoring points on the multiple heat exchange pipes, a flow dividing model is determined, the flow dividing model comprises the corresponding communication relation between the multiple heat exchange pipes and the multiple flow dividing pipes, and the sum of the average wind speed values of the multiple heat exchange pipes communicated with any two flow dividing pipes is equal. The method is used for guiding the shunting design of the heat exchanger.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a flow diversion design method for a heat exchanger of an indoor unit of an air conditioner. Background Art

[0002] Air-conditioning products have penetrated into thousands of households and become an indispensable appliance for every family. With the development of the economy, multi-split central air-conditioning has expanded from commercial to home use and has an increasingly broad market prospect.

[0003] The heat exchanger is an important component of the multi-split central air conditioner and is widely used in heat exchange systems for heat exchange between the heat exchange medium and the external air, and can also be used for heat exchange between two heat exchange media.

[0004] At present, in the development process of air-conditioning heat exchangers, the diversion of the heat exchanger is usually designed based on experience, which leads to unqualified heat exchange efficiency when the heat exchanger is welded and tested, which not only wastes test resources but also prolongs the design cycle. Summary of the Invention

[0005] The present application provides a flow splitting design method for a heat exchanger of an indoor unit of an air conditioner, which is used to solve the problem of poor heat exchange efficiency in the heat exchanger design process.

[0006] The air-conditioning indoor unit in the present application includes a heat exchanger and multiple diversion pipes. The heat exchanger includes fins and multiple heat exchange tubes. The multiple heat exchange tubes all extend along a first direction. Any diversion pipe can be connected with multiple adjacent heat exchange tubes in sequence to form a heat exchange branch, and the heat exchange tubes connected by the multiple diversion pipes are all different. Based on the above-mentioned air-conditioning indoor unit, the air-conditioning heat exchanger diversion design method provided in the present application includes: establishing a finite element model of the heat exchanger, and determining the flow velocity distribution cloud map of the heat exchanger according to the finite element model of the heat exchanger; establishing multiple wind speed monitoring points in the heat exchanger, and the multiple wind speed monitoring points are located on the same plane, and the plane where the multiple wind speed monitoring points are located is parallel to the windward surface of the heat exchanger; a group of wind speed monitoring points are set on any heat exchange tube, and a group of monitoring points includes: multiple wind speed monitoring points arranged at intervals along a first direction; obtaining the wind speed values of the multiple monitoring points according to the flow velocity distribution cloud map; according to the wind speed values of the multiple monitoring points, respectively obtaining the average wind speed values of a group of monitoring points on the multiple heat exchange tubes; according to the average wind speed value of a group of monitoring points on the multiple heat exchange tubes, determining the diversion model, the diversion model includes: the corresponding connection relationship between the multiple heat exchange tubes and the multiple diversion tubes, wherein the sum of the average wind speed values of the multiple heat exchange tubes connected by any two diversion tubes is equal.

[0007] That is to say, the present application sets up multiple groups of wind speed monitoring points on the heat exchange tubes in the heat exchanger according to the flow velocity distribution cloud map of the heat exchanger, obtains the wind speed value at each monitoring point and the average value of each group of monitoring points, and then makes the sum of the average wind speed values of the multiple heat exchange tubes connected by any two branch pipes equal, thereby solving the number of heat exchange tubes in each path.

[0008] It is understandable that in the above method, the corresponding heat exchange branch solved for the high wind speed position contains fewer heat exchange tubes, that is, the total length of the heat exchange tubes is shorter. Therefore, the flow resistance of the heat exchange medium in the heat exchange tubes is small, the flow rate is fast, and the number of cycles in the same time is large, so that the flow rate of the heat exchange medium in the heat exchange tubes at this location can match the high wind speed outside the heat exchange tubes. Conversely, the corresponding heat exchange branch solved for the low wind speed position contains more heat exchange tubes, that is, the total length of the heat exchange tubes is longer. Therefore, the flow resistance of the heat exchange medium in the heat exchange tubes is large, the flow rate is low, and the number of cycles in the same time is small, so that the flow rate of the heat exchange medium in the heat exchange tubes at this location can match the low wind speed outside the heat exchange tubes.

[0009] In this way, the flow rate of the heat exchange medium in the heat exchange tubes at different positions in the heat exchanger can always match the different wind speeds outside the heat exchange tubes, thereby improving the heat exchange efficiency of the heat exchanger.

[0010] In some embodiments of the present application, a plurality of heat exchange tubes are arranged at intervals along a second direction, the second direction being perpendicular to the first direction; and obtaining the average wind speed value of each group of monitoring points on the plurality of heat exchange tubes respectively includes: obtaining the average wind speed values u1, u2, ..., u1 of each group of monitoring points in sequence along the second direction. n According to the average wind speed value of each group of monitoring points on multiple heat exchange tubes, the diversion model is determined, including: obtaining the number of diversion tubes m of the heat exchanger, determining the number of diversion paths S1, S2...S of the heat exchanger m ; Wherein, m is greater than or equal to 2; the diversion model is determined according to the diversion equation, wherein the diversion path number equation is:

[0011] S1=u1+u2+…+u x ; S2 = u x+1 +u x+2 +…+u y ;...;S m =u y+1 +u y+2 +…+u n ; S1=S2=…=S m ; where n is greater than y, and y is greater than x.

[0012] In some embodiments of the present application, an air conditioner indoor unit includes a heat exchange assembly, the heat exchange assembly including a heat exchanger and a plurality of flow diversion pipes; after determining a flow diversion model based on average wind speed values of each group of monitoring points on the plurality of heat exchange pipes, the flow diversion design method further includes: manufacturing the heat exchange assembly based on the flow diversion model;

[0013] Detecting a heat exchange efficiency value of the heat exchange component; determining whether the heat exchange efficiency value is greater than a first preset value; and if so, determining that the heat exchange component is a target heat exchange component.

[0014] In some embodiments of the present application, after determining whether the heat exchange efficiency value is greater than a preset value, the flow splitting design method further includes: if not, determining whether the maximum difference between the heat exchange efficiency values of multiple heat exchange branches of the heat exchanger is greater than a first threshold; if so, adjusting the size of the flow splitting pipe of the flow splitting model, and continuing to manufacture the heat exchange component according to the flow splitting model; if not, adjusting the number of flow splitting pipes of the heat exchanger m=m+1, and determining the number of flow splitting paths S1, S2...S of the heat exchanger. m+1 .

[0015] In some embodiments of the present application, detecting the heat exchange efficiency value of the heat exchange component includes: detecting the heat exchange efficiency values of multiple heat exchange branches of the heat exchanger; and determining the heat exchange efficiency value of the heat exchange component based on the heat exchange efficiency values of the multiple heat exchange branches.

[0016] In some embodiments of the present application, determining whether the maximum difference between the heat exchange efficiency values of multiple heat exchange branches of a heat exchanger is greater than a first threshold includes: detecting the heat exchange efficiency values of multiple heat exchange branches of the heat exchanger; determining the maximum difference between the heat exchange efficiency values of multiple heat exchange branches of the heat exchanger based on the heat exchange efficiency values of the multiple heat exchange branches; and determining whether the maximum difference between the heat exchange efficiency values of the multiple heat exchange branches is greater than the first threshold.

[0017] In some embodiments of the present application, adjusting the size of the shunt pipe includes: adjusting the size of the shunt pipe of the shunt path with the smallest heat exchange efficiency value among the multiple heat exchange branches.

[0018] In some embodiments of the present application, after establishing the finite element model of the heat exchanger, and before determining the flow velocity distribution cloud map of the heat exchanger according to the finite element model of the heat exchanger, the diversion design method also includes: preliminarily analyzing and calculating the boundary conditions of the indoor unit; determining the flow velocity distribution cloud map of the heat exchanger according to the finite element model of the heat exchanger includes: determining the flow velocity distribution cloud map of the heat exchanger according to the boundary conditions of the indoor unit and the finite element model of the heat exchanger.

[0019] In some embodiments of the present application, after obtaining the wind speed values of multiple monitoring points according to the flow velocity distribution cloud map, and before obtaining the average wind speed value of each group of monitoring points on the multiple heat exchange tubes according to the wind speed values of the multiple monitoring points, the diversion design method also includes: determining the wind speed component values of the multiple monitoring points along a third direction according to the wind speed values of the multiple monitoring points, the third direction being perpendicular to the first direction and perpendicular to the second direction; judging whether the wind speed component value of each monitoring point is equal to its wind speed value; if so, obtaining the average wind speed value of each group of monitoring points on the multiple heat exchange tubes according to the wind speed values of the multiple monitoring points; if not, adjusting the boundary conditions of the indoor unit, and continuing to determine the flow velocity distribution cloud map of the heat exchanger according to the boundary conditions of the indoor unit and the finite element model of the heat exchanger.

[0020] In some embodiments of the present application, the boundary conditions include: ambient temperature, and / or the partitioning density of the finite element mesh, and / or the calculation model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0022] Figure 1 A schematic diagram of the connection structure of a duct-type air conditioner provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A structural diagram of a gas-liquid separator and an oil separator installed between the compressor and the four-way valve;

[0024] Figure 3 for Figure 1 A schematic diagram of a connection structure in which no four-way valve is provided between the compressor and the outdoor heat exchanger and the indoor heat exchanger;

[0025] Figure 4 A schematic diagram of the structure of the indoor unit provided in an embodiment of the present application;

[0026] Figure 5 One of the structural schematic diagrams of the heat exchange assembly provided in an embodiment of the present application;

[0027] Figure 6 The second structural diagram of the heat exchange assembly provided in the embodiment of the present application;

[0028] Figure 7 The third structural diagram of the heat exchange assembly provided in the embodiment of the present application;

[0029] Figure 8 One of the flow diagrams of the heat exchanger diversion design method provided in the embodiment of the present application;

[0030] Figure 9 A schematic diagram of a flow chart of multiple wind speed monitoring points of an indoor heat exchanger provided in an embodiment of the present application;

[0031] Figure 10 One of the schematic diagrams for establishing multiple wind speed monitoring points for an indoor heat exchanger provided in an embodiment of the present application;

[0032] Figure 11 The second schematic diagram of establishing multiple wind speed monitoring points for an indoor heat exchanger provided in an embodiment of the present application;

[0033] Figure 12 The second flow chart of the heat exchanger diversion design method provided in the embodiment of the present application;

[0034] Figure 13 The third flow chart of the heat exchanger diversion design method provided in the embodiment of the present application;

[0035] Figure 14 The fourth flow chart of the heat exchanger diversion design method provided in the embodiment of the present application;

[0036] Figure 15 Schematic diagram of the fifth flow chart of the heat exchanger diversion design method provided in the embodiment of the present application;

[0037] Figure 16 Flowchart 6 of the heat exchanger diversion design method provided in the embodiment of the present application;

[0038] Figure 17 This is the seventh flow chart of the heat exchanger diversion design method provided in the embodiment of the present application.

[0039] Reference numerals:

[0040] air conditioner 100;

[0041] Compressor 10; four-way valve 20; outdoor heat exchanger 30; throttling device 40;

[0042] Indoor unit 500; heat exchange component 5;

[0043] Indoor heat exchanger 50; fin 501; heat exchange tube 502; connecting elbow 503; wind speed monitoring point 504;

[0044] Diverter pipe 51; diverter branch pipe 511; diverter branch pipe 512;

[0045] Fan 52; air outlet 53; air supply 54;

[0046] Gas-liquid separator 61; oil separator 62. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connect" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "connected" used in this application have the meaning of conducting electricity. The specific meanings need to be understood in the context.

[0051] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0052] Figure 1 A schematic diagram of the connection structure of an air conditioner provided in an embodiment of the present application is shown. Figure 1 As shown, the present application provides a duct type air conditioner (hereinafter referred to as air conditioner 100), which may include a compressor 10, a four-way valve 20, an outdoor heat exchanger 30, a throttling device 40 and an indoor heat exchanger 50. For example, referring to Figure 1 The four-way valve 20 may have a first port A, a second port B, a third port C and a fourth port D, and the compressor 10 may have a return air port and an outlet air port (not shown in the figure).

[0053] The return air end of the compressor 10 can be connected to the first port A of the four-way valve, the outlet air end of the compressor 10 can be connected to the second port B of the four-way valve, the third port C of the four-way valve can be connected to one end of the outdoor heat exchanger 30, the other end of the outdoor heat exchanger 30 can be connected to one end of the indoor heat exchanger 50 through the throttling device 40, and the other end of the indoor heat exchanger 50 can be connected to the fourth port D of the four-way valve.

[0054] The air conditioner 100 may include an indoor unit and an outdoor unit. The compressor 10, four-way valve 20, and outdoor heat exchanger 30 may be part of the outdoor unit, while the corresponding indoor heat exchanger 50 may be part of the indoor unit. The throttling device 40 may be a capillary tube structure or an electronic expansion valve structure. The throttling device 40 may be installed in either the outdoor unit or the indoor unit, or in the refrigerant pipeline between the outdoor and indoor units. The throttling device 40 only needs to be located between the indoor heat exchanger 50 and the outdoor heat exchanger 30 along the refrigerant flow direction.

[0055] Based on this, driven by the compressor 10, the refrigerant can circulate between the indoor unit and the outdoor unit and produce a reversible phase change. While the refrigerant produces a phase change, it can release or absorb heat through the heat exchanger.

[0056] For example, the refrigerant in the outdoor unit can exchange heat with the surrounding medium (such as air) through the outdoor heat exchanger 30, thereby releasing heat and heating the surrounding air (or absorbing heat to cool the surrounding air). The refrigerant in the indoor unit can exchange heat with the surrounding air through the indoor heat exchanger 50, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the surrounding air).

[0057] By setting the four-way valve 20, the operating mode of the air conditioner 100 can be flexibly adjusted between the hot and cold working conditions and the heating working conditions, so that the air conditioner 100 can be applied to more usage scenarios.

[0058] When the air conditioner 100 is in cooling or dehumidification mode, Figure 1 Taking the solid arrow shown in FIG as an example, the four-way valve 20 can be adjusted to connect the second port B and the third port C, and to connect the fourth port D and the first port A.

[0059] In this way, the high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the outlet end through the second port B and the third port C of the four-way valve 20 to the outdoor heat exchanger 30, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the outdoor heat exchanger 30 to heat the air near the outdoor heat exchanger 30.

[0060] Subsequently, under the action of the throttling device 40, the pressure of the liquid refrigerant passing through the throttling device 40 and flowing into the indoor heat exchanger 50 is reduced, allowing the liquid refrigerant to absorb heat and vaporize in the indoor heat exchanger 50, thereby exchanging heat between the outdoor heat exchanger 30 and the indoor heat exchanger 50 and cooling the air near the indoor heat exchanger 50. The vaporized refrigerant flowing out of the indoor heat exchanger 50 can flow through the fourth port D and the first port A of the four-way valve 20 in sequence, and then the gaseous refrigerant can be sucked into the compressor 10 through the return air port and compressed, thereby realizing the circulation of the refrigerant.

[0061] When the air conditioner 100 is in heating mode, Figure 1 Taking the dashed arrow shown in FIG as an example, the four-way valve 20 can be adjusted to connect the second port B and the fourth port D, and to connect the third port C and the first port A.

[0062] In this way, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 10 can flow from the outlet end through the second port B and the fourth port D of the four-way valve 20 to the indoor heat exchanger 50, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the indoor heat exchanger 50 to heat the air near the indoor heat exchanger 50.

[0063] Subsequently, under the action of the throttling device 40, the pressure of the liquid refrigerant passing through the throttling device 40 and flowing into the outdoor heat exchanger 30 is reduced, allowing the liquid refrigerant to absorb heat and vaporize in the outdoor heat exchanger 30, thereby exchanging heat between the outdoor heat exchanger 30 and the indoor heat exchanger 50 and cooling the air around the outdoor heat exchanger 30. The vaporized refrigerant can flow through the third port C and the first port A of the four-way valve 20 in sequence, and then the gaseous refrigerant can be sucked into the compressor 10 through the return air port and compressed, thereby realizing the circulation of the refrigerant.

[0064] Figure 2 Shown Figure 1 A schematic diagram of a structure in which a gas-liquid separator and an oil separator are installed between the compressor and the four-way valve in order to prevent the gaseous refrigerant sucked into the compressor 10 from being mixed with liquid refrigerant or impurities, such as Figure 2 As shown, the air conditioner 100 may further include a gas-liquid separator 61, which may be installed between the first port A of the four-way valve 20 and the return air end of the compressor 10, so that the first port A can be connected and communicated with the return air end of the compressor 10 through the gas-liquid separator 61. In this way, when the gaseous refrigerant mixed with impurities such as liquid refrigerant or lubricating oil flows to the return air end of the compressor 10 through the gas-liquid separator 61, the gas-liquid separator 61 can separate non-gaseous impurities (such as liquid refrigerant, liquid lubricating oil or other impurities) to prevent the above-mentioned impurities from entering the compressor 10 and affecting the stable operation of the compressor 10.

[0065] Continue to refer to Figure 2 The air conditioner 100 may further include an oil separator 62. The outlet of the compressor 10 and the second port B of the four-way valve 20 may also be connected and communicated via the oil separator 62. In this way, the lubricating oil mixed in the high-temperature and high-pressure gaseous refrigerant can be separated during the process of flowing through the oil separator 62, thereby preventing the lubricating oil from adhering to the inner walls of the outdoor heat exchanger 30 and the indoor heat exchanger 50 as the refrigerant flows through them, thereby achieving higher heat exchange efficiency for the indoor heat exchanger 50 and the outdoor heat exchanger 30.

[0066] In some other embodiments, a four-way valve may not be required.

[0067] Figure 3 Shown Figure 1 A schematic diagram of a connection structure in which no four-way valve is provided between the compressor and the outdoor heat exchanger and the indoor heat exchanger, as shown in FIG. Figure 3 As shown, the air outlet of the compressor 10 can be connected to one end of the throttling device 40 through the outdoor heat exchanger 30, and the air return end of the compressor 10 can be connected to the other end of the throttling device 40 through the gas-liquid separator 61 and the indoor heat exchanger 50 in sequence. In this way, the refrigerant can circulate among the compressor 10, the outdoor heat exchanger 30, the throttling device 40, the indoor heat exchanger 50, the gas-liquid separator 61, and the compressor 10. At this time, the outdoor heat exchanger 30 can be used to heat the surrounding air, and the indoor heat exchanger 50 can be used to cool the surrounding air, so that the air conditioner 100 operates in a cooling mode or a dehumidifying mode (i.e., a cooling-only mode air conditioner).

[0068] The above describes the basic structure and operating principle of the air conditioner 100. During the development of the air conditioner 100, whether it is the outdoor unit or the indoor unit 500, the development and design of the new air duct must involve the size adjustment and diversion design of the heat exchanger. The pipe diversion design of the indoor heat exchanger 50 and the outdoor heat exchanger 30 are closely related to the distribution of the wind duct in the wind field. The heat exchange capacity is better at the location with high wind speed, while the heat exchange capacity is poor at the location with low wind speed. It is necessary to adjust the refrigerant flow of each heat exchange tube through the diverter and the diversion capillary (that is, the diverter branch and the diverter branch) so that the refrigerant flow in the heat exchange tube at different positions can match the wind speed outside the heat exchange tube, thereby improving the heat exchange capacity of the heat exchanger.

[0069] In traditional design, the flow distribution and related dimensional parameters of the heat exchanger are usually designed based on experience. As a result, when the heat exchanger is welded and tested, the heat exchange efficiency often fails to meet the requirements. This not only wastes test resources but also prolongs the design cycle.

[0070] Furthermore, to increase heat exchange capacity and efficiency, enlarging the heat exchanger or fan can increase the airflow into the heat exchanger, thereby improving heat exchange. However, this also comes with increased noise, increased costs, and the need for more space. Therefore, this is detrimental to the current trend of miniaturization of home appliances. Furthermore, with users demanding increasingly low noise levels, increased noise can easily lead to user complaints or the risk of exceeding national standards.

[0071] In summary, a more efficient method is needed to guide the development and design of heat exchangers. This application takes the indoor unit and indoor heat exchanger of an air conditioner as examples to illustrate the heat exchanger diversion design method based on wind field simulation.

[0072] Figure 4 A structural schematic diagram of the indoor unit provided in an embodiment of the present application is shown. The indoor unit 500 includes a heat exchange component 5, a fan 52, an air outlet 53 and an air supply port 54. The airflow generated by the fan 52 passes through the air outlet 53 and exchanges heat with the heat exchange component 5. The airflow after heat exchange is blown to the external environment from the air supply port 54.

[0073] Figure 5 One of the structural schematic diagrams of the heat exchange component provided in an embodiment of the present application is shown. The heat exchange component 5 includes an indoor heat exchanger 50 and a diversion pipe 51. The indoor heat exchanger 50 includes fins 501 and multiple heat exchange tubes 502 arranged in the fins 501. The multiple heat exchange tubes 502 all extend along the first direction X. Any diversion pipe 51 can be connected with multiple adjacent heat exchange tubes 502 in sequence to form a heat exchange branch, and the heat exchange tubes 502 connected by the multiple diversion pipes 51 are all different.

[0074] Figure 6 The second structural schematic diagram of the heat exchange assembly provided in an embodiment of the present application is shown. The heat exchange assembly 5 includes three heat exchange branches, and the diverter pipe 51 includes a diverter branch 511 and a diverter branch 512. In cooling mode, the heat exchange medium first flows from the diverter branch 511 to the heat exchange tube 502, and then from the heat exchange tube 502 to the diverter branch 512. In heating mode, the heat exchange medium first flows from the diverter branch 512 to the heat exchange tube 502, and then from the heat exchange tube 502 to the diverter branch 511. In this way, one diverter branch 511, multiple heat exchange tubes 502, and one diverter branch 512 are interconnected, one inlet and one outlet, forming a heat exchange branch.

[0075] Figure 7 The third structural diagram of the heat exchange assembly provided in an embodiment of the present application is shown. For example, the multiple heat exchange tubes 502 disposed in the fins 501 can be connected via connecting elbows 503. In another possible solution, the multiple heat exchange tubes 502 can also be connected by providing connecting holes in the fins 501.

[0076] Figure 8 One of the flow diagrams of the heat exchanger split flow design method provided in the embodiment of the present application is shown. Figure 8 The air-conditioning heat exchanger flow splitting design method provided in this application may include the following steps S101-S105:

[0077] S101. Establish a finite element model of the indoor heat exchanger, and determine a flow velocity distribution cloud diagram of the indoor heat exchanger based on the finite element model of the indoor heat exchanger.

[0078] In some embodiments, the finite element model of the indoor heat exchanger can be obtained by processing the three-dimensional model of the indoor heat exchanger using software such as Ansys Workbench, Abaqus, or HyperWorks.

[0079] Specifically, the three-dimensional model of the heat exchanger is first imported into the software (i.e., Ansys Workbench, Abaqus, or HyperWorks described above), the size of the grid unit that meets the requirements is set in the software, and the corresponding grid division method is selected according to the geometric characteristics of the three-dimensional model to discretize the three-dimensional model. The "grid unit size that meets the requirements" here refers to the grid size that can make the grid quality reach above 0.8 after grid division, which is the grid unit size that meets the requirements.

[0080] For example, the software first sets the mesh size to 0.2mm. If the mesh quality after division is 0.7, the mesh size does not meet the requirements and needs to be further reduced to 0.1mm. The 3D model is divided again according to the reset mesh size. If the mesh quality after division is 0.9, the mesh size now meets the requirements. If higher requirements are placed on simulation accuracy, the mesh size can be further reduced or a variety of mesh division methods can be selected based on the geometric characteristics of different locations in the 3D model for a refined mixed division.

[0081] In some embodiments, after "establishing a finite element model of the heat exchanger" and before "determining the flow velocity distribution cloud map of the heat exchanger based on the finite element model of the heat exchanger", the diversion design method may also include: preliminarily analyzing and calculating the boundary conditions of the indoor unit, wherein the boundary conditions include: ambient temperature, finite element mesh division density, and calculation model, etc.

[0082] In addition, see Figure 9 Step S101 includes S1011, determining a flow velocity distribution cloud diagram of the indoor heat exchanger according to the boundary conditions of the indoor unit and the finite element model of the indoor heat exchanger.

[0083] In other words, when boundary conditions are loaded on the divided finite element model in the software, the software will automatically convert the boundary conditions into multiple solution equations for each grid unit, and then couple the solution results of adjacent grid units through nodes. After further processing, the flow velocity distribution cloud map of the indoor heat exchanger can be obtained.

[0084] S102. Establish multiple wind speed monitoring points in the indoor heat exchanger.

[0085] Figure 10 FIG. 1 shows one of the position diagrams of multiple wind speed monitoring points 504 of the indoor heat exchanger provided in an embodiment of the present application. Figure 11 The second schematic diagram shows the locations of multiple wind speed monitoring points 504 of the indoor heat exchanger provided in an embodiment of the present application.

[0086] See also Figure 10 and Figure 11 , multiple wind speed monitoring points 504 are located on the same plane A, and the plane where the multiple wind speed monitoring points 504 are located is set to be parallel to the windward surface of the indoor heat exchanger. The multiple wind speed monitoring points 504 are grouped, and a group of wind speed monitoring points 504 is set on any heat exchange tube. A group of wind speed monitoring points 504 includes wind speed monitoring points along the first straight line direction (i.e. Figure 10 The plurality of wind speed monitoring points 504 are arranged at intervals (in the X-axis direction in the figure), and the distance L between two adjacent wind speed monitoring points 504 in the first straight line direction cannot be too large. If the distance L is too large, the plurality of wind speed monitoring points 504 are relatively scattered, and the number of wind speed monitoring points 504 serving as sample points is relatively small, thereby affecting the average wind speed value and failing to more truly represent the wind speed of the heat exchange tube. The distance L should be set according to the above-mentioned flow velocity distribution cloud map so that the wind speed gradients of two adjacent wind speed monitoring points 504 along the first straight line direction are close to each other.

[0087] It is understandable that since the airflow directions on the surface of the indoor heat exchanger are different, the airflow speed on the surface of the indoor heat exchanger is not suitable as a reference for setting the wind speed monitoring point 504. The airflow enters the interior of the indoor heat exchanger under the guidance of the fins of the indoor heat exchanger, and the speed direction of the airflow inside the indoor heat exchanger is relatively uniform. Therefore, the airflow speed in the thickness direction (i.e., the wind speed monitoring point 504) can be taken as the reference for setting the wind speed monitoring point 504. Figure 9 The plane of 3mm-17mm in the Z-axis direction is used as a reference for setting the wind speed monitoring point 504. If it is smaller than this range, it will be affected by the wind speed in other directions. If it is larger than this range, it will be affected by the number of rows of indoor heat exchangers, which is not conducive to the extraction of the wind speed at the wind speed monitoring point 504.

[0088] S103. Obtain wind speed values at multiple wind speed monitoring points according to the flow velocity distribution cloud map.

[0089] Specifically, by selecting point features in the software (that is, one of the object feature selection methods in the software, other methods include line features, surface features, and volume features), the wind speed value of each wind speed monitoring point can be obtained in the analysis result module. The wind speed value of each wind speed monitoring point in the software includes the total wind speed value and the speed components along the X, Y, and Z directions, providing a data basis for the subsequent establishment of the diversion equation.

[0090] S104 , obtaining the average wind speed value of each group of wind speed monitoring points on the multiple heat exchange tubes according to the wind speed values of the multiple wind speed monitoring points.

[0091] Specifically, see Figure 10 , multiple heat exchange tubes along the second straight line direction (ie Figure 10 The second straight line direction is perpendicular to the first straight line direction) and the step S1041 obtains the average wind speed values u1, u2, ..., u1 of the plurality of wind speed monitoring points in sequence along the second straight line direction. n For each heat exchange tube, the average value of multiple wind speed monitoring points on it is calculated, and the average values u1, u2...u are used. n Calibrate the wind speed values of the first heat exchange tube, the second heat exchange tube...the nth heat exchange tube respectively.

[0092] It can be understood that averaging can avoid abnormal values of individual characteristic points to a certain extent, thereby more objectively reflecting the wind speed value when the airflow flows through the heat exchange tube, and providing a reference basis for subsequent diversion design and flow distribution of heat exchange medium.

[0093] S105 , determining a flow diversion model according to the average wind speed value of each group of wind speed monitoring points on the plurality of heat exchange tubes.

[0094] The flow splitting model includes corresponding connection relationships between multiple heat exchange tubes and multiple flow splitting tubes. For example, the first flow splitting tube can be connected to the first to third rows of heat exchange tubes, the second flow splitting tube can be connected to the fourth to fifth rows of heat exchange tubes, and the third flow splitting tube can be connected to the sixth to tenth rows of heat exchange tubes.

[0095] In addition, the sum of the average wind speed values of the plurality of heat exchange tubes connected by any two diversion tubes is equal.

[0096] That is to say, the present application sets up multiple groups of wind speed monitoring points on the heat exchange tubes in the indoor heat exchanger according to the flow velocity distribution cloud map of the indoor heat exchanger, obtains the wind speed value at each wind speed monitoring point and the average value of each group of wind speed monitoring points, and then makes the sum of the average wind speed values of the multiple heat exchange tubes connected by any two diversion pipes equal, thereby solving the number of heat exchange tubes in each path.

[0097] It is understandable that in the above method, the heat exchange branch calculated at the high wind speed location (i.e., the location of the heat exchange tube with the larger value in the "average wind speed value") contains fewer heat exchange tubes, that is, the total length of the heat exchange tubes is shorter. Therefore, the flow resistance of the heat exchange medium in the heat exchange tubes is small, the flow rate is fast, and the number of cycles in the same time is large, so that the flow rate of the heat exchange medium in the heat exchange tubes at this location can match the high wind speed outside the heat exchange tubes. Conversely, the heat exchange branch calculated at the low wind speed location (i.e., the location of the heat exchange tube with the smaller value in the "average wind speed value") contains more heat exchange tubes, that is, the total length of the heat exchange tubes is longer. Therefore, the flow resistance of the heat exchange medium in the heat exchange tubes is large, the flow rate is low, and the number of cycles in the same time is small, so that the flow rate of the heat exchange medium in the heat exchange tubes at this location can match the low wind speed outside the heat exchange tubes.

[0098] In this way, the flow rate of the heat exchange medium in the heat exchange tubes at different positions in the indoor heat exchanger can always match the different wind speeds outside the heat exchange tubes, thereby improving the heat exchange efficiency of the indoor heat exchanger.

[0099] Figure 12 The second flow chart of the heat exchanger diversion design method provided in the embodiment of the present application is shown.

[0100] Reference Figure 12 In a possible implementation, step S105 includes steps S1051 and S1052:

[0101] S1051, obtaining the number m of the diversion pipes of the indoor heat exchanger, and determining the number of diversion paths S1, S2, ..., S of the indoor heat exchanger. m .

[0102] Wherein, m is greater than or equal to 2, that is, the number of the branching paths is at least two. The number of the branching paths is the number of the heat exchange branches.

[0103] It can be understood that the number of shunt pipes is consistent with the number of shunt paths. If the number of shunt pipes is m, the number of shunt paths is S1, S2...S m There are m roads in total.

[0104] S1052. Determine a flow diversion model according to the flow diversion equation.

[0105] Among them, the equation for the number of split paths is:

[0106] S1=u1+u2+…+u x ;

[0107] S2=u x+1 +u x+2 +…+u y ;

[0108] …

[0109] S m =u y+1 +u y+2 +…+u n ;

[0110] S1=S2=…=S m ;

[0111] Where n is greater than y, and y is greater than x.

[0112] In the above-mentioned flow splitting equation, for a given heat exchanger model, the total number of heat exchange tube rows, n, is fixed. The number of flow splitting paths, m, can be preliminarily determined within an appropriate range. This way, the number of equations is always greater than the number of unknown parameters. Elimination can then be used to gradually solve for parameters such as x and y, thereby determining the number of heat exchange tubes 502 that each flow splitting tube 51 connects to in each heat exchange branch. That is, the first flow splitting tube connects the first heat exchange tube to the xth heat exchange tube, forming the first heat exchange branch. The second flow splitting tube connects the x+1th heat exchange tube to the yth heat exchange tube, forming the second heat exchange branch. The mth flow splitting tube connects the y+1th heat exchange tube to the nth heat exchange tube, forming the mth heat exchange branch. This provides design information for the flow splitting model regarding how to perform splitting.

[0113] It is understandable that when determining the number of flow paths of the heat exchanger, there may be some difference in the sum of the average wind speeds of multiple heat exchange branches. The S1=S2-...=S described in the embodiment of the present application m are approximately equal.

[0114] For example, the S1, S2, ..., S m All of them can be equal after rounding off, wherein S1, S2, ..., S m The unit digit may be rounded off, the tenth digit may be rounded off, or the hundredth digit may be rounded off. The rounding off may be set as required and is not limited in this application.

[0115] For example, if rounded to the tenth place, the calculated S1=16.11, S2=16.21, S3=16.41, S4=16.32, then S1 can be retained as 16.0, S2 can be retained as 16.0, S3 can be retained as 16.0, and S4 can be retained as 16.0.

[0116] Figure 13 The third flow chart of the heat exchanger split flow design method provided in the embodiment of the present application is shown. Figure 13 In some embodiments of the present application, after determining the flow diversion model based on the average wind speed value of each group of wind speed monitoring points on the multiple heat exchange tubes in S105, the flow diversion design method may further include:

[0117] S106. Produce a heat exchange component according to the diversion model.

[0118] Specifically, according to the connectivity information between the multiple shunt tubes and the multiple heat exchange tubes provided by the shunt model, the actual heat exchange assembly is welded and manufactured, and the connectivity information between the multiple shunt tubes and the multiple heat exchange tubes of the actual heat exchange assembly is consistent with the solution result of the shunt equation.

[0119] For example, for a heat exchanger including 10 rows of heat exchange tubes, when the number of diversion paths is 3, the diversion equation obtains x=3, y=7. Then, in the actual heat exchange assembly manufactured by welding, the first diversion tube connects to the 1st to 3rd rows of heat exchange tubes, the second diversion tube connects to the 4th to 7th rows of heat exchange tubes, and the third heat exchange tube connects to the 8th to 10th rows of heat exchange tubes.

[0120] S107: Detect the heat exchange efficiency value of the heat exchange component.

[0121] For some possible implementations, see Figure 14 Step S107 detects the heat exchange efficiency value of the heat exchange component, including:

[0122] S1071. Detect heat exchange efficiency values of multiple heat exchange branches of the indoor heat exchanger.

[0123] It is understandable that there are many evaluation criteria and calculation methods for heat exchange efficiency, including temperature efficiency, heat transfer efficiency and thermal resistance coefficient. For example, if temperature efficiency is used to characterize heat exchange efficiency, a temperature sensor can be set on each branch heat exchange tube, and the heat exchange efficiency of the heat exchanger can be expressed as a percentage of the temperature change of the heat exchange medium.

[0124] S1072. Determine the heat exchange efficiency value of the heat exchange component according to the heat exchange efficiency values of the multiple heat exchange branches.

[0125] Specifically, the heat exchange efficiency of each path can be summed and the average can be taken as the heat exchange efficiency value of the heat exchange component, or different weights can be set for each path, and the weighted average can be taken as the heat exchange efficiency value of the heat exchange component 5.

[0126] Continue reading Figure 13 , S108, determine whether the heat exchange efficiency value is greater than a first preset value.

[0127] If so, execute S109 to determine that the heat exchange component is the target heat exchange component.

[0128] As can be understood, this application uses a flow velocity distribution cloud diagram and a flow splitting equation to determine the number of heat exchange tubes connected to each flow splitting tube, so that the wind speed outside the heat exchange tube matches the flow rate of the heat exchange medium inside the heat exchange tube, thereby improving the heat exchange efficiency and the success rate of the first design and trial production of the heat exchange component, reducing the waste of test resources and the design cycle. Therefore, if the heat exchange component manufactured according to the flow splitting model exceeds the first preset value (i.e., the ideal heat exchange efficiency required by the design) in the test, the heat exchange component can be determined as the target heat exchange component.

[0129] Because the ultimate heat exchange efficiency of a heat exchange assembly is affected by a variety of uncontrollable factors, the above design method can ensure that the wind speed outside the heat exchange tube matches the flow rate of the heat exchange medium inside the heat exchange tube to improve heat exchange efficiency. However, it cannot completely guarantee that the test results after the design trial production will stably meet the condition of being greater than the first preset value. Therefore, this application also provides a correction method to further improve the diversion design method.

[0130] Continue reading Figure 13 , determining whether the heat exchange efficiency value is greater than a first preset value, if not, the diversion design method further includes:

[0131] S110: Determine whether a maximum difference between heat exchange efficiency values of a plurality of heat exchange branches of the indoor heat exchanger is greater than a first threshold.

[0132] For some possible implementations, see Figure 15 Step S110 determines whether the maximum difference between the heat exchange efficiency values of the multiple heat exchange branches of the indoor heat exchanger is greater than a first threshold, which may include steps S1101-S1103:

[0133] S1101. Detect heat exchange efficiency values of multiple heat exchange branches of an indoor heat exchanger.

[0134] In one possible implementation, temperature efficiency is used to characterize heat exchange efficiency. A temperature sensor is provided on each branch heat exchange tube, and the heat exchange efficiency value of each path is represented by the percentage of the temperature change of the heat exchange medium in each path.

[0135] S1102. Determine a maximum difference between the heat exchange efficiency values of the multiple heat exchange branches of the indoor heat exchanger according to the heat exchange efficiency values of the multiple heat exchange branches.

[0136] It can be understood that the maximum value and the minimum value are selected from the multiple heat exchange efficiency values, and then the maximum difference between the heat exchange efficiency values of the heat exchange branches is calculated using the difference between the maximum value and the minimum value.

[0137] S1103. Determine whether the maximum difference between the heat exchange efficiency values of the multiple heat exchange branches is greater than a first threshold.

[0138] The first threshold value can be set according to the needs of the actual occasion and is not limited in this application. It is understood that a smaller first threshold value indicates a smaller difference in heat exchange efficiency between the heat exchange branches, while a larger first threshold value indicates a larger difference in heat exchange efficiency between the heat exchange branches.

[0139] Continue reading Figure 13 , determine whether the maximum difference between the heat exchange efficiency values of multiple heat exchange branches of the indoor heat exchanger is greater than a first threshold.

[0140] If so, it indicates that the reason why the heat exchange efficiency does not meet the first preset value is that the heat exchange efficiency of a certain path is low. Therefore, step S111 is executed to adjust the size of the diversion pipe.

[0141] Specifically, see Figure 16 Adjusting the size of the shunt pipe includes step S1111: adjusting the size of the shunt pipe of the shunt path with the lowest heat exchange efficiency value among the multiple heat exchange branches. It is understandable that the shunt path with the lowest heat exchange efficiency value lowers the overall heat exchange efficiency of the heat exchange component. Therefore, increasing the size of this shunt pipe can improve the heat exchange efficiency of this path, thereby improving the overall heat exchange efficiency of the heat exchange component. On this basis, a trial heat exchange component is welded and tested to continue to determine whether the heat exchange efficiency value is greater than a first preset value. This cycle is repeated until the first preset value is met, and the heat exchange component is determined to be the target heat exchange component.

[0142] If not, it means that the reason why the heat exchange efficiency does not meet the first preset value is that there is a problem with the number of heat exchange paths initially planned. In this case, it is necessary to execute S112 and set m=m+1, that is, adjust the number of diversion pipes of the indoor heat exchanger, increase the number of diversion paths, and determine the number of diversion paths S1, S2...S of the indoor heat exchanger. m+1 Then, the diversion equation is re-listed according to the number of diversion paths, and a new diversion model is determined by solving it. Subsequent welding trial production and test verification are carried out until the test results meet the first preset value, and the heat exchange component is determined to be the target heat exchange component.

[0143] In this way, through the above two correction methods, rapid iterative updates can be made towards the ideal heat exchange efficiency based on the basic diversion design method provided in this application, thereby reducing the number of welding trials and test verifications, thereby reducing the waste of test resources and the product design cycle.

[0144] In some embodiments of the present application, after establishing a finite element model of the indoor heat exchanger, and before determining the flow velocity distribution cloud map of the indoor heat exchanger based on the finite element model of the indoor heat exchanger, the diversion design method also includes preliminarily analyzing and calculating the boundary conditions of the indoor unit. Determining the flow velocity distribution cloud map of the indoor heat exchanger based on the finite element model of the indoor heat exchanger includes determining the flow velocity distribution cloud map of the indoor heat exchanger based on the boundary conditions of the indoor unit and the finite element model of the indoor heat exchanger.

[0145] It is understandable that boundary conditions are one of the key factors in obtaining the velocity distribution cloud map and affecting the simulation accuracy. Only when the boundary conditions are calculated correctly and loaded on the finite element model of the indoor heat exchanger can a more reliable velocity distribution cloud map be obtained through analysis.

[0146] See Figure 17 In some embodiments of the present application, after obtaining wind speed values at multiple wind speed monitoring points according to the flow velocity distribution cloud map, and before obtaining the average wind speed value of each group of wind speed monitoring points on the multiple heat exchange tubes based on the wind speed values at the multiple wind speed monitoring points, the flow splitting design method further includes:

[0147] S1031. Determine wind speed component values of the plurality of wind speed monitoring points along a third straight line direction according to wind speed values of the plurality of wind speed monitoring points. The third straight line direction is perpendicular to the first straight line direction and perpendicular to the second straight line direction.

[0148] S1032. Determine whether the wind speed component value along the third straight line direction of each wind speed monitoring point is close to its wind speed value. If so, obtain the average wind speed value of each group of wind speed monitoring points on the multiple heat exchange tubes based on the wind speed values of the multiple wind speed monitoring points.

[0149] S1033: If not, adjust the boundary conditions of the indoor unit, and continue to determine the flow velocity distribution cloud diagram of the heat exchanger based on the boundary conditions of the indoor unit and the finite element model of the indoor heat exchanger.

[0150] If yes, step S104 is executed to obtain the wind speed values of the multiple wind speed monitoring points and obtain the average wind speed value of each group of wind speed monitoring points on the multiple heat exchange tubes.

[0151] That is to say, the wind speed component value along the third straight line of the wind speed monitoring point is close to the wind speed value. If the boundary condition is correct, the next step is executed. If the boundary condition is incorrect, the boundary condition is returned to be corrected.

[0152] The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A flow splitting design method for an indoor heat exchanger of an air conditioner, characterized in that: The air conditioner indoor unit includes a heat exchanger and a plurality of diverter pipes, the heat exchanger includes fins and a plurality of heat exchange pipes, the plurality of heat exchange pipes extend along a first straight line, any diverter pipe is connected to a plurality of adjacent heat exchange pipes to form a heat exchange branch, and the heat exchange pipes connected to the plurality of diverter pipes are all different; The air conditioner indoor unit heat exchanger split design method includes: Establishing a finite element model of the heat exchanger, and determining a flow velocity distribution cloud map based on the finite element model; Establishing a plurality of wind speed monitoring points in the heat exchanger, wherein the plurality of wind speed monitoring points are located in the same plane, and the plane where the plurality of wind speed monitoring points are located is parallel to the windward surface of the heat exchanger; providing a group of wind speed monitoring points on any of the heat exchange tubes, wherein the group of wind speed monitoring points includes a plurality of wind speed monitoring points arranged at intervals along a first straight line direction; Obtaining wind speed values at multiple wind speed monitoring points according to the flow velocity distribution cloud map; According to the wind speed values of the plurality of wind speed monitoring points, respectively obtaining the average wind speed values of the group of wind speed monitoring points on the plurality of heat exchange tubes; A diversion model is determined based on the average wind speed value of the group of wind speed monitoring points on the multiple heat exchange tubes. The diversion model includes the corresponding connection relationship between the multiple heat exchange tubes and the multiple diversion tubes, wherein the sum of the average wind speed values of the multiple heat exchange tubes connected by any two of the diversion tubes is equal.

2. The flow split design method for the heat exchanger of the air conditioner indoor unit according to claim 1, characterized in that: The plurality of heat exchange tubes are arranged at intervals along a second straight direction, and the second straight direction is perpendicular to the first straight direction; The step of respectively obtaining the average wind speed values of the group of wind speed monitoring points on the plurality of heat exchange tubes comprises: The average wind speed values u1, u2, ..., u of the plurality of wind speed monitoring points are sequentially obtained along the second straight line direction. n ; Determining a flow diversion model according to the average wind speed value of the group of wind speed monitoring points on the plurality of heat exchange tubes includes: Get the number of the diversion pipes of the heat exchanger m , determine the number of diversion paths S1, S2...S of the heat exchanger m ; Wherein, m is greater than or equal to 2; The flow splitting model is determined according to a flow splitting equation, wherein the flow splitting equation is: S1=u1+u2+…+u x ; S2=u x+1 +u x+2 +…+u y ; …； WITH m =in y+1 +in y+2 +…+in n ; S1=S2=…=S m ; Wherein, n is greater than y, and y is greater than x.

3. The flow splitting design method for the heat exchanger of the indoor unit of the air conditioner according to claim 2, characterized in that: The air conditioner indoor unit comprises: a heat exchange component, and the heat exchange component comprises: the heat exchanger and the plurality of diverter pipes; After determining the flow split model based on the average wind speed values of the group of wind speed monitoring points on the plurality of heat exchange tubes, the flow split design method for the heat exchanger of the air conditioner indoor unit further includes: manufacturing the heat exchange component according to the diversion model; detecting a heat exchange efficiency value of the heat exchange component; Determining whether the heat exchange efficiency value is greater than a first preset value; If so, the heat exchange component is determined to be the target heat exchange component.

4. The flow splitting design method for the heat exchanger of the air conditioner indoor unit according to claim 3, characterized in that: After determining whether the heat exchange efficiency value is greater than the first preset value, the flow split design method for the heat exchanger of the air conditioner indoor unit further includes: If not, determining whether the maximum difference between the heat exchange efficiency values of the multiple heat exchange branches of the heat exchanger is greater than a first threshold; If so, adjust the size of the diversion pipe of the diversion model and continue to manufacture the heat exchange component according to the diversion model; If not, the number of the diversion pipes of the heat exchanger is adjusted to m=m+1, and the number of diversion paths of the heat exchanger is determined to be S1, S2...S m+1 .

5. The flow splitting design method for the heat exchanger of the indoor unit of the air conditioner according to claim 4, characterized in that: The detecting the heat exchange efficiency value of the heat exchange component includes: detecting heat exchange efficiency values of the plurality of heat exchange branches of the heat exchanger; The heat exchange efficiency value of the heat exchange component is determined according to the heat exchange efficiency values of the multiple heat exchange branches.

6. The flow splitting design method for the heat exchanger of the indoor unit of the air conditioner according to claim 5, characterized in that: The determining whether the maximum difference between the heat exchange efficiency values of the plurality of heat exchange branches of the heat exchanger is greater than the first threshold value includes: detecting heat exchange efficiency values of the plurality of heat exchange branches of the heat exchanger; determining a maximum difference between the heat exchange efficiency values of the plurality of heat exchange branches of the heat exchanger according to the heat exchange efficiency values of the plurality of heat exchange branches; Determine whether the maximum difference between the heat exchange efficiency values of the plurality of heat exchange branches is greater than the first threshold.

7. The flow splitting design method for the heat exchanger of the indoor unit of the air conditioner according to claim 4, characterized in that: The adjusting the size of the shunt pipe includes: The size of the diverter pipe of the heat exchange branch having the smallest heat exchange efficiency value among the plurality of heat exchange branches is adjusted.

8. The flow splitting design method for the heat exchanger of the indoor unit of the air conditioner according to claim 2, characterized in that: After establishing the finite element model of the heat exchanger and before determining the flow velocity distribution cloud diagram of the heat exchanger according to the finite element model of the heat exchanger, the flow diversion design method further includes: Preliminary analysis and calculation of the boundary conditions of the indoor unit; Determining the flow velocity distribution cloud diagram of the heat exchanger according to the finite element model of the heat exchanger includes: A flow velocity distribution cloud diagram of the heat exchanger is determined according to the boundary conditions of the indoor unit and the finite element model of the heat exchanger.

9. The flow splitting design method for the heat exchanger of the air conditioner indoor unit according to claim 8, characterized in that: After obtaining the wind speed values of the plurality of wind speed monitoring points according to the flow velocity distribution cloud map, and before respectively obtaining the average wind speed values of the group of wind speed monitoring points on the plurality of heat exchange tubes according to the wind speed values of the plurality of wind speed monitoring points, the flow diversion design method further includes: determining, based on the wind speed values at the plurality of wind speed monitoring points, wind speed component values at the plurality of wind speed monitoring points along a third straight line direction, wherein the third straight line direction is perpendicular to the first straight line direction and perpendicular to the second straight line direction; Determining whether the wind speed component value and the wind speed value at each wind speed monitoring point are equal; If yes, then obtaining the average wind speed value of the group of wind speed monitoring points on the plurality of heat exchange tubes according to the wind speed values of the plurality of wind speed monitoring points; If not, the boundary conditions of the indoor unit are adjusted, and the flow velocity distribution cloud diagram of the heat exchanger is further determined based on the boundary conditions of the indoor unit and the finite element model of the heat exchanger.

10. The flow splitting design method for the heat exchanger of the indoor unit of the air conditioner according to claim 8, characterized in that: The boundary conditions include: ambient temperature, and / or finite element mesh division density, and / or calculation model.

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