Hanging type air conditioner indoor unit

Abstract

The utility model provides a hanging type air conditioner indoor unit which comprises a machine shell, an indoor fan and an indoor heat exchanger, and the indoor fan and the indoor heat exchanger are arranged in the machine shell. The back-folded fins and the front-folded fins are formed by cutting fin bodies, a plurality of heat exchange tube holes with the same hole diameter are formed in the fin bodies, heat exchange tubes can penetrate through the heat exchange tube holes, the back-folded fins incline in the direction away from a front panel of the machine shell from top to bottom, and connecting points at the bottoms of the back-folded fins abut against the machine shell. The front folding fins are arc-shaped, and the tops of the front folding fins are spliced with the tops of the rear folding fins; wherein the quantity of air entering the front folding fins and the rear folding fins is proportional to the quantity of the heat exchange tubes on the front folding fins and the rear folding fins, so that the overall heat exchange performance is improved.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, and in particular relates to a wall-mounted air conditioner indoor unit. Background Technology

[0002] A wall-mounted air conditioner indoor unit typically consists of a casing and an indoor heat exchanger. The indoor heat exchanger, located inside the casing, is a key component for the air conditioner to perform cooling and heating functions. Most existing wall-mounted air conditioners use multi-fold heat exchangers. These multi-fold heat exchangers, connected in a semi-enclosed structure within a limited space, increase the contact area with indoor air, thereby improving the heat exchange capacity of the indoor heat exchanger.

[0003] During prolonged operation, air conditioner indoor units accumulate a significant amount of dust and grime on the indoor heat exchanger. Cooling mode is required to generate condensate for self-cleaning. However, multi-fold heat exchangers have numerous seams. These seams disrupt the drainage path, making it nearly impossible to effectively clean the dirt at these seams, resulting in poor self-cleaning performance.

[0004] To improve the self-cleaning effect of air conditioners, related technologies utilize arc-shaped heat exchangers to replace two-fold heat exchangers, eliminating the central seam of the indoor heat exchanger and thus improving drainage performance and self-cleaning. However, existing indoor heat exchanger designs do not consider the correspondence between the number and distribution of heat exchange tubes and airflow. This results in a mismatch between the number of heat exchange tubes and the airflow of the front fold heat exchanger, leading to differences in heat exchange efficiency across different areas of the heat exchanger. The high-airflow area exhibits better heat exchange, while the low-airflow area shows poor heat exchange, resulting in poor overall heat exchange performance of the indoor heat exchanger and affecting the cooling or heating effect of the air conditioner.

[0005] Meanwhile, existing indoor heat exchangers can only be applied to housings of specific sizes. If they are to be applied to housings of other sizes, new molds need to be developed, which results in large equipment investment, low production versatility, and high management difficulty. Utility Model Content

[0006] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore,

[0007] According to embodiments of this disclosure, a wall-mounted air conditioner indoor unit is provided, comprising:

[0008] A housing, wherein an air conditioning inlet and an air conditioning outlet are provided on the housing, and the housing includes a front panel;

[0009] An indoor fan is installed inside the housing and located near the air conditioner outlet;

[0010] An indoor heat exchanger is disposed within the housing and located relative to the indoor fan and close to the air conditioning inlet. The indoor heat exchanger includes:

[0011] Heat exchange tubes are used to circulate refrigerant.

[0012] The rear folding fins are inclined in a direction away from the front panel in a top-to-bottom direction;

[0013] The front folding fin is arc-shaped and its arc opening faces the indoor fan. The front folding fin and the rear folding fin are formed by cutting the fin body. The fin body is provided with a cut structure and two rows of heat exchange tube holes for the heat exchange tubes to pass through.

[0014] The cutout structure avoids the heat exchange tube hole, and the cutout structure includes:

[0015] The first notch is located on the windward edge of the fin body;

[0016] The second notch is disposed on the leeward edge of the fin body, corresponding to the first notch, and a continuous portion is formed between the second notch and the first notch;

[0017] A dividing line is formed on the continuous portion, one end of which extends to the bottom of the first notch and the other end extends to any position of the outline of the second notch.

[0018] The fin body is cut at the dividing line to form the rear folded fin and the front folded fin located on both sides of the cut structure. The dividing line on the rear folded fin and the top of the front folded fin are connected at an installation angle.

[0019] The above technical solution has the following advantages or beneficial effects: the front and rear folded fins are connected by a dividing line to form a stable installation angle, which enhances the overall structural stability of the heat exchanger, reduces splicing gaps, and improves heat exchange performance. Simultaneously, by setting a second notch and extending one end of the dividing line to any position on the outline of the second notch, the position of the dividing line can be adjusted within the width of the second notch, thus forming various different installation angles. This allows the indoor heat exchanger to be used with different casing specifications, expanding the application range of the indoor heat exchanger, improving production versatility and mold utilization, and reducing costs.

[0020] According to an embodiment of this disclosure, the vertical distance between the first notch and the second notch is H, where H ≥ 7 mm.

[0021] The above technical solution has the following advantages or beneficial effects: by reasonably setting the vertical distance H, the problem of warping during fin punching and dropping is avoided, which affects the fin material collection efficiency and ensures the processing reliability of the fin body.

[0022] According to an embodiment of the present disclosure, the outline of the first notch includes a first edge, a second edge, and a third edge connected in sequence. The first edge is located on the front folding fin, the third edge is located on the rear folding fin, the second edge forms the bottom of the first notch, and one end of the dividing line extends to the center of the second edge.

[0023] The above technical solution has the following advantages or beneficial effects: by defining the structure of the first notch, the cutting of the fin body is more precise, which improves the accuracy and reliability of splicing the rear folded fin and the front folded fin.

[0024] According to an embodiment of this disclosure, the fin body includes a straight fin section, the first notch and the second notch are located on the straight fin section, and the first edge forms an angle α with the length direction of the straight fin section, where α < 90°;

[0025] The second notch has a dimension of W along the length of the straight section of the fin, where W ≤ H / tanα.

[0026] The above technical solution has the following advantages or beneficial effects: by limiting the maximum width of the second notch by the included angle α, it ensures that the installation angle of the rear folding fin and the front folding fin can be flexibly adjusted under different frame specifications of the housing.

[0027] According to an embodiment of this disclosure, the third edge forms an angle β with the length direction of the straight segment of the fin, β > α, and W satisfies:

[0028] (1)

[0029] In formula (1), H is the vertical distance between the bottom of the first notch and the second notch.

[0030] The above technical solution has the following advantages or beneficial effects: the second notch with different widths can be determined according to the included angles α and β of different ranges, which facilitates the adjustment of the installation angle of the indoor heat exchanger and achieves compatibility with existing frames of different casings.

[0031] According to an embodiment of this disclosure, the depth dimension of the second notch is D, where D≤1mm.

[0032] The above technical solution has the following advantages or beneficial effects: by reasonably setting the depth dimension of the second notch, the connection strength between the front folding fin and the rear folding fin during manufacturing is guaranteed, and the splicing gap between the front folding fin and the rear folding fin is reduced.

[0033] According to an embodiment of this disclosure, the first notch includes a transition notch, which is formed by a recess in the direction of the windward edge of the fin body toward the leeward edge, and the projection of the transition notch in the depth direction of the transition notch falls within the projection range of the second notch in the depth direction of the transition notch.

[0034] The above technical solution has the following advantages or beneficial effects: by setting a transition gap, the problem of the second gap being unable to be processed due to the small cutting gap is solved, and the manufacturability of the second gap is guaranteed.

[0035] Another aspect of this application provides a wall-mounted air conditioner indoor unit, which includes:

[0036] A housing, wherein an air conditioning inlet and an air conditioning outlet are provided on the housing, and the housing includes a front panel;

[0037] An indoor fan is installed inside the housing and located near the air conditioner outlet;

[0038] An indoor heat exchanger is disposed within the housing and located relative to the indoor fan and close to the air conditioning inlet. The indoor heat exchanger includes:

[0039] Heat exchange tubes are used to circulate refrigerant.

[0040] The rear folding fin is inclined away from the front panel in a downward direction. The rear folding fin has a connection point that abuts against the housing. The connection point is the intersection of the center line of the rear folding fin in its own extension direction and the bottom end of the rear folding fin. The rear folding fin is provided with N1 heat exchange tube holes for the heat exchange tubes to pass through. The N1 heat exchange tube holes are arranged in two rows in the direction from the windward side to the leeward side. The number of heat exchange tube holes in each row of the rear folding fin is the same.

[0041] The front folding fin has its top connected to the top of the rear folding fin. The front folding fin has N2 heat exchange tube holes for the heat exchange tubes to pass through. The N2 heat exchange tube holes are arranged in two rows in the direction from the windward side to the leeward side. The number of heat exchange tube holes in each row of the front folding fin is the same.

[0042] The distance between the dividing point on the rear folding fin and the end of the air conditioning inlet furthest from the front panel in the width direction of the casing is: The dividing point is the intersection of the centerline of the rear-folding fin in its extension direction and the tip of the rear-folding fin. satisfy: , Where L is the width of the air inlet of the air conditioner.

[0043] The above technical solution has the following advantages or beneficial effects: by clarifying the range of the dividing point of the rear folded fins, the installation position of the rear folded fins is determined, so that the air volume entering the front folded fins and the rear folded fins is proportional to the number of heat exchange tubes, thereby improving the overall heat exchange performance of the indoor heat exchanger and solving the problem of mismatch between the number of heat exchange tubes and the air volume in the existing technology. It is especially suitable for application scenarios where indoor heat exchangers of specific specifications are installed in the casing.

[0044] According to an embodiment of this disclosure, in a cross section perpendicular to the length direction of the housing, the heat exchange tube holes on the rear folding fin and the heat exchange tube holes on the front folding fin are located on opposite sides of a dividing line, the dividing line extending along the height direction of the housing and passing through the dividing point.

[0045] The above technical solution has the following advantages or beneficial effects: by clarifying the distribution relationship of heat exchange tube holes on the rear folded fins and the front folded fins, it helps to more accurately control the correspondence between air volume and the number of heat exchange tubes on the rear folded fins and the front folded fins, thereby improving the heat exchange performance of the indoor heat exchanger.

[0046] According to an embodiment of this disclosure, the rear-folding fin forms an inclination angle with respect to the height direction of the housing. , Where L is the horizontal distance between the dividing point and the connection point, and Pt is the hole spacing of each row of heat exchange tube holes on the rear folded fin.

[0047] The above technical solution has the following advantages or beneficial effects: According to The range of L can be determined, and the optimal tilt angle range of the rear folding fins can be further determined, so that the air volume entering the front and rear folding fins is proportional to the number of heat exchange tubes passing through the heat exchange tube holes, thereby achieving a uniform distribution of air volume on the front and rear folding fins and improving the overall heat exchange performance of the indoor heat exchanger. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a three-dimensional structural view of the indoor unit of a wall-mounted air conditioner according to the embodiments of this disclosure;

[0050] Figure 2 This is a front view of the indoor unit of a wall-mounted air conditioner according to an embodiment of this disclosure;

[0051] Figure 3 This is a front view of the indoor unit of a wall-mounted air conditioner with the air guide plate omitted according to the embodiments of this disclosure;

[0052] Figure 4 yes Figure 3 A cross-sectional view along the AA direction;

[0053] Figure 5 This is a cross-sectional view of the indoor unit of a wall-mounted air conditioner according to an embodiment of this disclosure;

[0054] Figure 6 This is a schematic diagram of the airflow direction within the housing according to an embodiment of this disclosure;

[0055] Figure 7 It is based on the wind speed curve at the air inlet of the air conditioner in the embodiments of this disclosure;

[0056] Figure 8 This is a structural schematic diagram of the fin body according to the embodiments of this disclosure;

[0057] Figure 9 This is a schematic diagram of a partial structure of the fin body according to an embodiment of the present disclosure. Figure 1 ;

[0058] Figure 10 This is a schematic diagram of a partial structure of the fin body according to an embodiment of the present disclosure. Figure 2 ;

[0059] Figure 11 This is a partial schematic diagram of the processing of the fin body according to the embodiments of this disclosure;

[0060] Figure 12 This is a cross-sectional view of a wall-mounted air conditioner indoor unit according to another embodiment of this disclosure;

[0061] Figure 13 This is a cross-sectional view of a wall-mounted air conditioner indoor unit according to yet another embodiment of this disclosure.

[0062] In the above figures: indoor unit of wall-mounted air conditioner 100; casing 1; air conditioner air inlet 11; air conditioner air outlet 12; air guide plate 13; air inlet grille 14; front panel 15; indoor fan 2; fin body 3; rear folding fin 31; front folding fin 32; heat exchange tube hole 33; first notch 34; first edge 341; second edge 342; third edge 343; transition notch 344; fourth edge 345; second notch 35; dividing line 36; heat exchange tube 4; vortex 5; high wind zone 6; low wind zone 7; wind speed probe test section 8. Detailed Implementation

[0063] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0064] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0065] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0066] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0067] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0068] This utility model proposes a wall-mounted air conditioner indoor unit 100, as described below. Figures 1-13 The indoor unit 100 of a wall-mounted air conditioner is described. Among other things, Figure 1 , Figure 2 This is an external view of the indoor unit 100 of a wall-mounted air conditioner. The indoor unit 100 is part of the air conditioner and is installed indoors for heat exchange with the indoor environment. The air conditioner also includes an outdoor unit, which is typically installed outdoors and used to transfer heat from the indoor environment to the outside.

[0069] refer to Figures 1-3 In one illustrative embodiment of the wall-mounted air conditioner indoor unit 100 provided by this utility model, the wall-mounted air conditioner indoor unit 100 may include a housing 1. The housing 1 is installed indoors, and the housing 1 forms the overall appearance of the wall-mounted air conditioner indoor unit 100.

[0070] The housing 1 is rectangular, with the left and right ends being the two ends of the housing along its own length.

[0071] The housing 1 has an internal receiving space. This receiving space is used to house and fix various components in the wall-mounted air conditioner indoor unit 100, preventing collisions between external objects and the components inside the housing 1, thereby improving the reliability of the wall-mounted air conditioner indoor unit 100 during transportation or installation. The housing 1 includes a front panel 15, which is located on the front side of the housing 1.

[0072] In some embodiments of this application, reference is made to Figure 1 The housing 1 may include an air conditioning inlet 11.

[0073] The air conditioning inlet 11 is connected to the housing space. As the inlet for external air to flow into the casing 1, the air conditioning inlet 11 allows indoor air to enter the housing space through the air conditioning inlet 11.

[0074] In some embodiments of this application, reference is made to Figure 2 The housing 1 may include an air conditioning vent 12.

[0075] The air conditioner outlet 12 is connected to the housing space. The air conditioner outlet 12 serves as the outlet for the heat exchange airflow inside the casing 1, allowing the airflow in the housing space to flow out through the air conditioner outlet 12.

[0076] In some embodiments of this application, the air conditioning inlet 11 may be located at the top of the housing 1. The air conditioning outlet 12 may be located at the front of the housing 1.

[0077] The air outlet 12 is elongated and can extend along the length of the casing 1, improving the aesthetics of the wall-mounted air conditioner indoor unit 100. In this embodiment, when the wall-mounted air conditioner indoor unit 100 is working, air enters from the top and exits from the front, facilitating installation.

[0078] Of course, in other embodiments of this application, the air conditioner inlet 11 and air conditioner outlet 12 can be located in other positions, as long as the requirements for air intake and exhaust can be met.

[0079] In some embodiments of this application, the indoor unit 100 of the wall-mounted air conditioner may include an indoor fan 2.

[0080] An indoor fan 2 is installed within the housing 1 and is used to drive indoor air from outside the housing 1 into the housing 1 through the air inlet. The indoor fan 2 drives the air in the housing 1 to flow along the air inlet 11 towards the air outlet 12. The indoor fan 2 can be a cross-flow fan. The indoor fan 2 can be installed close to the air outlet 12.

[0081] In some embodiments of this application, reference is made to Figure 4 The indoor unit 100 of the wall-mounted air conditioner may include an indoor heat exchanger. The indoor heat exchanger extends along the length of the casing 1 and is located within a receiving space inside the casing 1 for heat exchange with the airflow inside the casing 1.

[0082] In this embodiment, the indoor heat exchanger is positioned relative to the indoor fan 2 near the air conditioning inlet 11. That is, in the airflow direction within the casing 1, the indoor fan 2 is located downstream of the indoor heat exchanger.

[0083] When the indoor unit 100 of the wall-mounted air conditioner is running, driven by the indoor fan 2, indoor air enters the containment space through the air conditioner inlet 11. The indoor air in the containment space flows through the indoor heat exchanger for heat exchange. The heat-exchanged airflow is discharged to the outside through the air conditioner outlet 12, thereby enabling the air conditioner to cool and heat, play a role in regulating the indoor temperature, and achieve the user's comfortable temperature.

[0084] In some embodiments of this application, the wall-mounted air conditioner indoor unit 100 may include an air guide plate 13.

[0085] The air guide plate 13 is rotatably connected to the housing 1 and is located at the air conditioning outlet 12. The air guide plate 13 opens or closes the air conditioning outlet 12. When the air guide plate 13 opens the air conditioning outlet 12, it is used to guide the heat exchange airflow.

[0086] In some embodiments of this application, the wall-mounted air conditioner indoor unit 100 may include an air inlet grille 14.

[0087] The air intake grille 14 is located at the air conditioning intake 11 to prevent larger impurities from entering the containment space.

[0088] In some embodiments of this application, the indoor unit 100 of the wall-mounted air conditioner may include an air inlet filter, which is disposed between the air inlet grille 14 and the indoor heat exchanger to filter indoor air and improve air quality.

[0089] An outdoor unit for an air conditioner may include an outdoor unit housing. The outdoor unit housing may contain an installation cavity.

[0090] The outdoor unit housing may include an outdoor air inlet. The outdoor air inlet may communicate with the mounting cavity. The outdoor air inlet can be used to introduce outdoor air into the mounting cavity.

[0091] The outdoor unit housing may include an outdoor air outlet. The outdoor air outlet may communicate with the mounting cavity. The outdoor air outlet can be used to exhaust air from inside the mounting cavity to the outside of the mounting cavity.

[0092] An outdoor unit for an air conditioner may include an outdoor heat exchanger. The outdoor heat exchanger may be located inside an installation cavity.

[0093] An outdoor unit for an air conditioner may include an outdoor fan. The outdoor fan may be installed inside the mounting cavity.

[0094] The rotation of the outdoor fan causes outdoor air to enter the installation cavity through the outdoor air inlet and exchange heat with the outdoor heat exchanger. After heat exchange, the outdoor air flows out of the installation cavity through the outdoor air outlet.

[0095] An air conditioner may include a compressor. The compressor is located within the mounting cavity.

[0096] Air conditioners may include a throttling device. The throttling device is used to limit airflow. The throttling device can be provided in the indoor unit or outdoor unit of a wall-mounted air conditioner.

[0097] Air conditioners execute a refrigeration cycle using a compressor, condenser, throttling device, and indoor heat exchanger. The refrigeration cycle involves a series of processes including compression, condensation, expansion, and evaporation, supplying refrigerant to the conditioned and heat-exchanged air.

[0098] The compressor compresses the refrigerant gas at low temperature and low pressure and discharges it at high temperature and high pressure. The discharged refrigerant gas flows into the condenser.

[0099] The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0100] The throttling device causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant.

[0101] The refrigerant that expands in the throttling device evaporates in the indoor heat exchanger and returns the refrigerant gas, which is in a low temperature and low pressure state, to the compressor.

[0102] Indoor heat exchangers achieve a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0103] Of the two heat exchangers, one is a condenser and the other is an indoor heat exchanger. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in heating mode. When the indoor heat exchanger is used as an indoor heat exchanger, the air conditioner is used as a cooler in cooling mode.

[0104] In some embodiments of this application, the indoor heat exchanger is a multi-fold heat exchanger. The multi-fold heat exchanger is connected in a semi-enclosed structure in a limited space to arrange a longer heat exchange tube 4, thereby increasing the contact area between the heat exchange tube 4 and the indoor air and improving the heat exchange capacity of the indoor heat exchanger.

[0105] In related technologies, although the indoor airflow undergoes pre-treatment via an intake filter before entering the indoor heat exchanger, a large amount of dust and dirt still accumulates on the heat exchanger during prolonged operation, leading to a deterioration in indoor air quality. Therefore, it is necessary to periodically self-clean the indoor heat exchanger, using condensate generated in cooling mode to remove the dust and dirt. However, the presence of seams in multi-fold heat exchangers interrupts their drainage path, making it almost impossible to effectively clean the dirt at the seams, resulting in poor self-cleaning performance of the air conditioner.

[0106] The top seam of a multi-fold heat exchanger has little impact on drainage, while the middle seam has a significant impact. Therefore, to improve drainage performance and self-cleaning effect, this embodiment uses a two-fold heat exchanger, consisting of a front fold and a rear fold. The front fold heat exchanger is arc-shaped, eliminating the middle seam of the indoor heat exchanger and thus improving drainage performance and self-cleaning.

[0107] refer to Figure 6 The indoor heat exchanger may include multiple rear-folded fins 31 arranged in parallel, with an airflow channel formed between two adjacent rear-folded fins 31 to facilitate air passage.

[0108] The indoor heat exchanger may include multiple front folding fins 32 arranged in parallel, with an airflow channel formed between two adjacent front folding fins 32 to facilitate air passage.

[0109] Among them, multiple rear-folding fins 31 correspond one-to-one with multiple front-folding fins 32.

[0110] refer to Figure 4The rear folding fin 31 is inclined away from the front panel 15 in the direction from top to bottom. The front folding fin 32 is arc-shaped, and the arc-shaped opening of the front folding fin 32 faces the indoor fan 2. The top of the front folding fin 32 is connected to the top of its corresponding rear folding fin 31 at an installation angle B.

[0111] The indoor heat exchanger may include several heat exchange tubes 4 that penetrate the front folded fins 32 and the rear folded fins 31. A medium flow channel is formed within each heat exchange tube 4, and refrigerant flows through the medium flow channel. The several heat exchange tubes 4 are connected to form the refrigerant passage of the indoor heat exchanger.

[0112] The heat exchange tube 4 is installed approximately perpendicular to the gas flow direction, so that heat on the heat exchange tube 4 is transferred circumferentially to the front folded fin 32 and the rear folded fin 31. When air flows through the airflow channel, the air will exchange heat with the heat exchange tube 4, carrying away the heat on the front folded fin 32 and the rear folded fin 31.

[0113] refer to Figure 8 The front folded fin 32 and the rear folded fin 31 are formed by cutting the fin body 3. The fin body 3 is provided with a plurality of heat exchange tube holes 33 for heat exchange tubes 4 to pass through. The plurality of heat exchange tube holes 33 have the same diameter.

[0114] It is understandable that the fin body 3 has a single row of heat exchange tube holes 33 or multiple rows of heat exchange tube holes 33, with adjacent rows of heat exchange tube holes 33 arranged alternately.

[0115] In related technologies, the design of indoor heat exchangers can only be applied to housings of specific sizes. If a known specification of indoor heat exchanger is to be applied to housings of other sizes, new molds need to be developed, which results in large equipment investment, low production versatility, and high management difficulty.

[0116] To address the aforementioned technical issues, a slit structure is provided on the fin body 3, avoiding the heat exchange tube holes 33. The fin body 3 has two rows of heat exchange tube holes 33, and the position of the dividing line of the slit structure is adjustable. This allows for various installation angles B to be formed between the front-folded fin 32 and the rear-folded fin 31 formed by cutting the fin body 3 at the dividing line, thus achieving multiple uses for the fin body mold.

[0117] Specifically, reference Figure 8 The cut structure may include a first notch 34. The first notch 34 is formed on the windward edge of the fin body 3.

[0118] The first notch 34 is formed by the indentation from the windward edge of the fin body 3 toward the leeward edge.

[0119] By providing a first notch 34 located at the windward edge, the airflow path at the junction of the front folding fins 32 and the rear folding fins 31 can be optimized. The first notch 34 guides the airflow to be distributed more evenly, reducing airflow resistance at the junction and thus improving the heat exchange efficiency of the indoor heat exchanger.

[0120] Continue to refer to Figure 8 The first notch 34 is formed to avoid the heat exchange tube hole 33, so there is no need to cut the heat exchange tube hole 33, thus avoiding damage to the heat exchange capacity of the indoor heat exchanger.

[0121] In some embodiments, the fin body 3 can be integrally stamped, and the first notch 34 can be formed on the fin body 3 by stamping. It is understood that the specific manufacturing method of the fin body 3 is the same as that of a conventional tube-fin heat exchanger, and will not be described in detail here.

[0122] refer to Figure 8 The cut structure may include a dividing line 36, one end of which extends to the bottom of the first notch 34. The fin body 3 is cut at the dividing line 36 into a rear-folded fin 31 and a front-folded fin 32.

[0123] The notch structure may include a second notch 35, which is disposed on the leeward edge of the fin body 3 corresponding to the first notch 34. The other end of the dividing line 36 extends to the second notch 35.

[0124] refer to Figure 9 The second notch 35 avoids the heat exchange tube hole 33, so there is no need to cut the heat exchange tube hole 33. A continuous portion is formed between the first notch 34 and the second notch 35, and a dividing line 36 is formed on the continuous portion.

[0125] In actual production, the fin body 3 is punched out as a whole, and the first notch 34 and the second notch 35 that avoid the heat exchange tube hole 33 are punched out by a special mold. Then, the fin body 3 is cut into the rear folded fin 31 and the front folded fin 32 by the dividing line 36.

[0126] In some embodiments, one end of the dividing line 36 may extend to any position of the second notch 35.

[0127] One end of the dividing line 36 extends to the bottom of the first notch, and the other end can extend to any position in the second notch 35, making the dividing line 36 a variable dividing line 36. (Reference) Figure 9 This is a schematic diagram showing the other end of the dividing line 36 connecting to different positions of the second notch 35.

[0128] Continue to refer to Figure 6The fin body 3 can be divided into two parts along the aforementioned dividing line 36. The dividing line 36 on the rear folded fin 31 connects with the front folded fin 32 to form an installation angle B. The variable dividing line 36 allows the installation angle B to be adjusted.

[0129] In this embodiment, by adjusting the position of the dividing line 36 within the width range of the second notch, a variety of different installation angles B can be formed, making the indoor heat exchanger suitable for different casing specifications, expanding the application range of the indoor heat exchanger, improving production versatility and mold utilization, and reducing costs.

[0130] It is understandable that the end of the dividing line 36 on the front folding fin 32 that is closer to the rear folding fin 31 is the apex of the leeward edge of the front folding fin 32, forming the aforementioned dividing point.

[0131] In some embodiments of this application, the vertical distance between the first notch 34 and the second notch 35 is H, where H ≥ 7 mm.

[0132] The vertical distance H cannot be too small, otherwise it will cause warping during fin punching and blanking, affecting the fin's material collection efficiency. To ensure the processing reliability of the front-folded fin 32 and the rear-folded fin 31, the vertical distance H is set to be no less than the first parameter value. The first parameter value can be any value between 7mm and 9mm. A suitable specific parameter should be selected during the design process. For example, the first parameter value can be 7mm.

[0133] Since a number of heat exchange tube holes 33 are arranged on the fin body 3, it is crucial that the first notch 34 does not damage the integrity of the heat exchange tube holes 33 when the first notch 34 is arranged on it.

[0134] To address the aforementioned issues, in this embodiment, the first notch 34 has a contour line formed on the fin body 3 that runs along a path that avoids the heat exchange tube hole 33. This contour line is composed of multiple continuous straight lines, facilitating the processing of irregularly shaped molds.

[0135] In some embodiments of this application, the outline of the first notch 34 may include a first edge 341. The first edge 341 is located on the front folding fin 32.

[0136] The outline of the first notch 34 may include a third edge 343, which is located on the rear folding fin 31. The third edge 343 and the first edge 341 form an angle between the opening and the windward side.

[0137] The outline of the first notch 34 may include a second edge 342. The second edge 342 connects the first edge 341 and the third edge 343 to form a continuous whole.

[0138] The second edge 342 is designed to assist in blade positioning when cutting the fin body 3. The second edge 342 is small in size and does not affect the splicing of the rear folded fin 31 and the front folded fin 32.

[0139] refer to Figure 11 The second edge 342 forms the bottom of the first notch 34, and the setting of the second edge 342 provides a clear connection position for the subsequent setting of the dividing line 36.

[0140] One end of the dividing line 36 extends to the center of the second edge 342.

[0141] In this embodiment, by defining the structure of the first notch 34 and the position of the dividing line 36, the cutting of the fin body 3 is made more precise, which improves the accuracy and reliability of splicing the rear folded fin 31 and the front folded fin 32.

[0142] In some embodiments of this application, the fin body 3 may include straight fin sections.

[0143] refer to Figure 8 The first notch 34 and the second notch 35 are located on the straight section of the fin. The straight section of the fin provides a stable structural foundation for the first notch 34 and the second notch 35, making the fin body 3 more stable during processing and installation, reducing deformation and errors, thereby improving the overall quality and performance of the fin.

[0144] The first edge 341 forms an angle α with the length direction of the straight section of the fin, and the second edge 342 forms an angle β with the length direction of the straight section of the fin. Where α < 90°, β > α.

[0145] In some embodiments, the dimension of the second notch 35 along the length of the straight section of the fin is W, where W ≤ H / tanα. The dimension of the second notch 35 along the length of the straight section of the fin is the width of the second notch 35.

[0146] In this embodiment, the maximum width of the second notch 35 is defined by the included angles α and H, ensuring that the installation angles of the rear folding fin 31 and the front folding fin 32 can be flexibly adjusted under different housing frame specifications.

[0147] In some embodiments of this application, W satisfies:

[0148] (1)

[0149] In formula (1), H is the vertical distance between the first notch 34 and the second notch 35.

[0150] In this embodiment, the included angle β of different angle ranges is associated with the vertical distance H between the first notch 34 and the second notch 35. Through this quantified relationship, the size of the second notch 35 can be precisely controlled, thereby ensuring the adjustment range and accuracy of the variable installation angle, while reducing the processing difficulty of the fin body and improving the processing quality.

[0151] Based on the included angles α and β within different ranges, the second notch with different widths is determined, so that when the position of the dividing line 36 is adjusted within the width range of the second notch 35, the installation angle of the indoor heat exchanger can be easily adjusted, achieving compatibility with existing frames of different casings and further expanding the application range of the indoor heat exchanger.

[0152] In this embodiment, by adjusting the width W of the second notch 35, the adjustable range of the dividing line 36 between the front folding fins 32 and the rear folding fins 31 is controlled, thereby realizing the installation angle B between the front and rear folding heat exchangers. This allows the indoor heat exchanger to be used with different casing specifications, expanding the application range of the indoor heat exchanger. Figure 12 and Figure 13 This is an embodiment that adjusts the installation angle B of the indoor heat exchanger based on the upper and lower limits of the width of the second notch 35, thereby achieving compatibility with different existing casings.

[0153] In some embodiments of this application, the depth dimension of the second notch 35 is D, where D≤1mm.

[0154] The dimension of the second notch 35 in the width direction of the straight section of the fin is the depth dimension.

[0155] The depth dimension D cannot be too large, as this will reduce the connection strength between the front folded fin 32 and the rear folded fin 31, increasing the splicing gap. To ensure the connection strength between the front folded fin 32 and the rear folded fin 31 during manufacturing and to reduce the splicing gap between the front and rear folded heat exchangers, the depth dimension D is set to no greater than the second parameter value. The second parameter value can be any value between 0.8 mm and 1 mm. A suitable specific parameter should be selected during the design process. For example, the second parameter value could be 1 mm.

[0156] In some embodiments of this application, in order to ensure the manufacturability of the second notch 35, the first notch 34 may include a transition notch 344. The projection of the transition notch 344 in the depth direction falls within the projection range of the second notch 35 in the depth direction of the transition notch 344.

[0157] refer to Figure 11 The transition gap 344 is formed by the indentation from the windward edge of the fin body 3 towards the leeward edge.

[0158] In other words, continue to refer to Figure 11 The second notch 35 is connected to the adjacent first notch 34 of the fin body 3 by a transition notch 344, and the second notch 35 is connected to the adjacent transition notch 344.

[0159] In this embodiment, by setting a transition notch 344, the problem of the second notch being unable to be processed due to the small cutting gap is solved, and the manufacturability of the second notch portion 35 is guaranteed.

[0160] In some embodiments of this application, considering the convenience of mold manufacturing, the second notch and the transition notch 344 are generally adopted as an approximately rectangular cutting edge shape. Of course, in other embodiments, the cutting edge shape can be changed to a wavy, circular, or other irregular shape.

[0161] In some embodiments of this application, the first notch 34 may include a fourth edge 345. The fourth edge 345 connects the third edge 343 and the transition notch 344.

[0162] It should be noted that the rear folded fin 31 and the plurality of heat exchange tubes 4 passing through the rear folded fin 31 form the aforementioned rear folded heat exchanger, and the front folded fin 32 and the plurality of heat exchange tubes 4 passing through the rear folded fin 31 form the aforementioned front folded heat exchanger.

[0163] Since indoor fans 2 mostly use cross-flow fans, the airflow direction is deflected when passing through the fan, forming an eccentric vortex. (Reference) Figure 5 This is a schematic diagram of the airflow direction inside the casing. The wind speed at the center of the vortex 5 is close to 0. Most of the airflow is drawn into the interior of the indoor fan 2 from the upper right and upper left. There are high wind zone 6 and low wind zone 7. According to this rule, the air field distribution inside the casing 1 is not uniform.

[0164] In related technologies, the design of indoor heat exchangers does not consider the correspondence between the number and distribution of heat exchange tubes 4 and the air volume. This results in a mismatch between the number of heat exchange tubes 4 in the front heat exchanger and the air volume, leading to differences in heat exchange effects in different areas of the heat exchanger. The heat exchange effect is better in high-airflow areas and worse in low-airflow areas, resulting in poor overall heat exchange performance of the indoor heat exchanger and affecting the cooling or heating effect of the air conditioner.

[0165] To address the aforementioned technical issues, in this embodiment, the installation and design of the indoor heat exchanger are optimized based on the airflow distribution at the air inlet 11 of the air conditioner, so that the airflow on the front folding fins 32 and the rear folding fins 31 of the indoor heat exchanger is proportional to the number of heat exchange tubes on them, thereby improving the overall heat exchange performance of the indoor heat exchanger.

[0166] Specifically, the rear folding fin 31 has N1 heat exchange tube holes 33, and the front folding fin 32 has N2 heat exchange tube holes 33, where N1 and N2 satisfy the following:

[0167] (2)

[0168] In the above formula (2), The wind speed distribution curve is shown at the wind speed probe test section 8 of the air conditioner air inlet 11. L is the width of the air inlet 11, and x0 is the distance between the dividing point on the rear folding fin 31 and the end of the air inlet 11 away from the front panel 15 in the width direction of the housing 1, which is the vertical coordinate of the dividing point on the test section.

[0169] It should be noted that the wind speed distribution curve was obtained by testing the indoor unit of the wall-mounted air conditioner without installing the indoor heat exchanger and at the preset fan speed, to avoid the wind speed distribution being affected by the structure of the installed indoor heat exchanger. The preset fan speed can be the rated speed of indoor fan 2.

[0170] Understandably, the wind speed probe test section 8 is a specific section used to measure airflow velocity. (Reference) Figure 6 The airflow at the air conditioning inlet 11 enters the casing from top to bottom through the air conditioning inlet 11. Therefore, the wind speed probe test section 8 is a horizontal plane so as to measure the airflow velocity distribution entering from the top air intake grille 14.

[0171] The airflow velocity at the inlet section of the air intake grille 14 was tested, and the results are as follows: Figure 6 As shown, the inlet air velocity distribution of the air intake grille 14 in the width direction of the casing is uneven, exhibiting a characteristic of high air velocity on both sides and low air velocity in the middle.

[0172] Because the air intake grille 14 is a controllable variable in the design, after removing the influence of the air intake grille 14, the wind speed is refitted based on the established coordinate system, such as... Figure 7 As shown.

[0173] refer to Figure 6 On a cross-section perpendicular to the length of the casing 1, the origin O is taken as the end of the wind speed probe test section 8 of the air conditioning inlet 11 that is furthest from the front panel 15. The direction from the origin O to the other end of the test section is taken as the X-axis, and the direction perpendicular to the X-axis is taken as the Y-axis. The coordinates of the other end of the test section are (L, 0).

[0174] Understandable For a point on the X-axis The perpendicular distance from the center O of the circle. This represents the vertical height of the Y-axis on the plane, i.e. Indicates different horizontal positions on the test cross section Wind speed at that location.

[0175] refer to Figure 7 The wind speed at air inlet 11 of the air conditioner exhibits an inverted parabolic distribution: ,in, , where a is the parabola's opening coefficient, b is the slope of the tangent line to the parabola, and c is the y-intercept of the parabola.

[0176] For different cross-flow fans and duct characteristics of wall-mounted air conditioner indoor units, the wind speed distribution curves were fitted, yielding the following results: 0.01 > a ≥ 0 (opening upwards), -0.1 < b ≤ 0 (the tangent to the parabola at point (0, c) slopes downwards to the right), 0 < b ≤ 5. (The axis of symmetry of the parabola is located to the left of the air conditioner inlet 11).

[0177] Under the conditions of equation (2), the number of heat exchange tubes 4 on the front and rear heat exchangers of the indoor heat exchanger is proportional to the air volume, which solves the problem of mismatch between the number of heat exchange tubes 4 on the front and rear heat exchangers and the air volume in the prior art, and improves the overall heat exchange performance.

[0178] In actual use, the number of heat exchange tube holes 33, N1 and N2, is allowed to fluctuate within ±m. m is the number of rows of heat exchange tube holes on the indoor heat exchanger arranged along the direction from the windward side to the leeward side, where m ≥ 1. The number of heat exchange tube holes in each row on the indoor heat exchanger is the same, meaning the allowable fluctuation deviation between the number of heat exchange tube holes 33, N1 and N2, in each row is ±1.

[0179] In some scenarios, when installing an indoor heat exchanger of a specific specification into the casing 1, it is necessary to design and optimize the best tilt angle of the heat exchanger.

[0180] In this embodiment, the dividing point can be regarded as the dividing point between the heat exchange tube holes 33 on the front folded fin 32 and the rear folded fin 31. When installing an indoor heat exchanger of a specific specification into the housing 1, the perpendicular coordinates of the dividing point between the front folded fin 32 and the rear folded fin 31 can be calculated based on the known N1, N2 and the width L of the air conditioning inlet 11 of the housing. ,according to The tilt angle A of the rear folding fin 31 can be determined, thus completing the determination of the optimal tilt angle A.

[0181] It is understandable that the shape, size, and number of heat exchange tubes on the front and rear folding heat exchangers of a specific specification of indoor heat exchanger are fixed.

[0182] In this embodiment, the known N1, N2, and L are substituted into the known function. In the middle, the calculation yielded The connection point P of the rear-folded fin 31 abuts against the casing 1, meaning that the connection point P on the rear-folded fin 31 is in a relatively fixed position. Based on the dividing point, x0, and connection point P, the tilt angle A of the rear-folded fin 31 relative to the height of the casing can be determined, ensuring that the airflow entering the front and rear folded heat exchangers is proportional to the number of heat exchange tubes, thus improving the overall heat exchange performance.

[0183] Furthermore, the bottom of the front folding wing 31 abuts against the housing 1, and the top of the front folding wing 31 is spliced ​​with the top of the rear folding wing 31. The splicing position between the top of the front folding wing 31 and the top of the rear folding wing 31 has no gaps, resulting in a good sealing effect.

[0184] In some embodiments of this application, on a cross section perpendicular to the length direction of the housing 1, the heat exchange tube holes 33 on the rear folding fin 31 and the heat exchange tube holes 33 on the front folding fin 31 are located on opposite sides of the dividing line.

[0185] The dividing line extends along the height direction of the casing 1 and passes through the dividing point.

[0186] By clarifying the distribution relationship of the heat exchange tube holes 33 on the rear folded fin 31 and the front folded fin 32, it is helpful to more accurately control the correspondence between the air volume and the number of heat exchange tubes on the rear folded fin 31 and the front folded fin 32, thereby improving the heat exchange performance of the indoor heat exchanger.

[0187] In this embodiment, in the direction from the windward side to the leeward side, N1 heat exchange tube holes 33 and N2 heat exchange tube holes 33 are arranged in two rows on the rear folding fin 31 and the front folding fin 32, respectively.

[0188] The two rows of heat exchange tube holes 33 are staggered, and the number of heat exchange tube holes in each row on the rear folded fin 31 is the same, which is (N1 / 2). The number of heat exchange tube holes 22 in each row on the front folded fin 32 is the same, which is (N2 / 2).

[0189] refer to Figure 8 In this embodiment, both the rear folded fin 31 and the front folded fin 32 are provided with two rows of heat exchange tube holes 33. By setting the number of rows of heat exchange tube holes 33 on the rear folded fin 31 and the front folded fin 32 to be the same, the layout of the heat exchange tubes is further optimized, and the heat exchange performance of the indoor heat exchanger is improved.

[0190] In some other embodiments, the distance between the dividing point on the rear folding fin 31 and the end of the air conditioning inlet 11 away from the front panel 15 in the width direction of the housing 1 is... The dividing point is the intersection of the centerline of the rear folding fin 31 in its own extension direction and the top end of the rear folding fin 31.

[0191] satisfy: , Where L is the width of the air inlet of the air conditioner.

[0192] Specifically, in some scenarios, due to and If all values ​​are small and approximately zero, then the above-mentioned non-uniform wind field can be simplified to: Therefore, equation (2) can be simplified to:

[0193] (3)

[0194] The number of heat exchange tube holes 33 arranged in two rows, N1 and N2, is allowed to fluctuate within a range of ±2. That is, the allowable fluctuation deviation of the number of heat exchange tube holes in each row on the rear folded fin 31 and the front folded fin 32 is ±1. Substituting the fluctuating N1 and N2 into formula (3), the above can be obtained. The upper and lower limits are determined. The range.

[0195] In this embodiment, The range is calculated based on the airflow distribution and the number of heat exchange tube holes in the front and rear fins. The range of the tilt angle A is determined so that the rear folding fin 31 is in the optimal installation position, which can realize the uniform distribution of air volume on the front and rear folding heat exchangers and improve the heat exchange efficiency of the indoor heat exchanger.

[0196] In some embodiments of this application, the tilt angle is calculated according to the following formula (4). :

[0197] (4)

[0198] In formula (4), L is the horizontal distance between the dividing point and the connection point P, Pt is the hole spacing of each row of heat exchange tube holes 33 on the rear folded fin 31, and the product of Pt and N1 is the length dimension of the rear folded fin 31.

[0199] It is understandable that, on a cross-section perpendicular to the length of the casing 1, when the connection point P is typically located on the side of the air conditioner inlet 11 furthest from the front panel 15, the horizontal distance L between the dividing point and the connection point P is... + , The horizontal distance between connection point P and the end of air conditioner inlet 11 away from front panel 15 is the distance between connection point P and the end of air conditioner inlet 11 away from front panel 15 in the width direction of housing 1.

[0200] Since the specifications of the casing are known, the connection point P of the rear folding fins 31 is fixed relative to the air conditioning inlet 11. Therefore, the casing 1 of each specification... The parameters are known.

[0201] In some other embodiments, for mass-produced models with a finalized casing for the indoor unit of a wall-mounted air conditioner, the indoor heat exchanger needs to be optimized. Specifically:

[0202] The indoor heat exchanger may include a rear-folded fin 31, which is inclined in a direction away from the front panel 15 in a top-to-bottom direction, and the rear-folded fin 31 is provided with N1 heat exchange tube holes 33.

[0203] The indoor heat exchanger may include a front folded fin 32, the top of which is connected to the top of the rear folded fin 31, and the front folded fin 32 is provided with N2 heat exchange tube holes 33.

[0204] The rear folded fin 31 and the front folded fin 32 have the same diameter for the heat exchange tube holes 33, and N1 and N2 satisfy the following:

[0205] (2)

[0206] In formula (2), Where 0.01 > a ≥ 0, -0.1 < b ≤ 0, and 0 < b ≤ 5, L can be a known parameter.

[0207] Specifically, the position of the dividing point between the front folding fin 32 and the rear folding fin 31 is known. The number of heat exchange tube holes 33 on the rear folded fin 31 and the front folded fin 32, N1 and N2, are calculated according to formula (2). By adjusting the distance Pt between the heat exchange tube holes 33 on the rear folded fin 31 and the front folded fin 32, the heat exchange tubes on them are rearranged to complete the optimization of the indoor heat exchanger.

[0208] In this embodiment, for the wall-mounted air conditioner indoor unit with a fixed casing, the number of heat exchange tube holes 33 on the front and rear fins 31 of the indoor heat exchanger is redistributed and arranged according to the air volume distribution at the air inlet 11, so that the number of heat exchange tubes on the front and rear fins 31 is proportional to the air volume. This solves the problem of mismatch between the number of heat exchange tubes on the front and rear fins 31 and the air volume in the prior art, and improves the overall heat exchange performance of the indoor heat exchanger.

[0209] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0210] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A wall-mounted air conditioner indoor unit, characterized in that, include: A housing, wherein an air conditioning inlet and an air conditioning outlet are provided on the housing, and the housing includes a front panel; An indoor fan is installed inside the housing and located near the air conditioner outlet; An indoor heat exchanger is disposed within the housing and located relative to the indoor fan and close to the air conditioning inlet. The indoor heat exchanger includes: Heat exchange tubes are used to circulate refrigerant. The rear folding fins are inclined in a direction away from the front panel in a top-to-bottom direction; The front folding fin is arc-shaped and its arc opening faces the indoor fan. The front folding fin and the rear folding fin are formed by cutting the fin body. The fin body is provided with a cut structure and two rows of heat exchange tube holes for the heat exchange tubes to pass through. The cutout structure avoids the heat exchange tube hole, and the cutout structure includes: The first notch is located on the windward edge of the fin body; The second notch is disposed on the leeward edge of the fin body, corresponding to the first notch, and a continuous portion is formed between the second notch and the first notch; A dividing line is formed on the continuous portion, one end of which extends to the bottom of the first notch and the other end extends to any position of the outline of the second notch. The fin body is cut at the dividing line to form the rear folded fin and the front folded fin located on both sides of the cut structure. The dividing line on the rear folded fin and the top of the front folded fin are connected at an installation angle.

2. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, The vertical distance between the bottom of the first notch and the second notch is H, where H ≥ 7 mm.

3. The wall-mounted air conditioner indoor unit according to claim 1 or 2, characterized in that, The outline of the first notch includes a first edge, a second edge, and a third edge connected in sequence. The first edge is located on the front folding fin, the third edge is located on the rear folding fin, the second edge forms the bottom of the first notch, and one end of the dividing line extends to the center of the second edge.

4. The wall-mounted air conditioner indoor unit according to claim 3, characterized in that, The fin body includes a straight fin section, the first notch and the second notch are located on the straight fin section, and the first edge forms an angle α with the length direction of the straight fin section, where α < 90°; The second notch has a dimension of W along the length of the straight section of the fin, where W ≤ H / tanα.

5. The wall-mounted air conditioner indoor unit according to claim 4, characterized in that, The third edge forms an angle β with the length direction of the straight segment of the fin, β > α, and W satisfies: In formula (1), H is the vertical distance between the bottom of the first notch and the second notch.

6. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, The first notch includes a transition notch, which is formed by the indentation of the windward edge of the fin body towards the leeward edge. The projection of the transition notch in the depth direction falls within the projection range of the second notch in the depth direction of the transition notch.

7. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, The depth dimension of the second notch is D, where D≤1mm.

8. A wall-mounted air conditioner indoor unit, characterized in that, include: A housing, wherein an air conditioning inlet and an air conditioning outlet are provided on the housing, and the housing includes a front panel; An indoor fan is installed inside the housing and located near the air conditioner outlet; An indoor heat exchanger is disposed within the housing and located relative to the indoor fan and close to the air conditioning inlet. The indoor heat exchanger includes: Heat exchange tubes are used to circulate refrigerant. The rear folding fin is inclined away from the front panel in a downward direction. The rear folding fin has a connection point that abuts against the housing. The connection point is the intersection of the center line of the rear folding fin in its own extension direction and the bottom end of the rear folding fin. The rear folding fin is provided with N1 heat exchange tube holes for the heat exchange tubes to pass through. The N1 heat exchange tube holes are arranged in two rows in the direction from the windward side to the leeward side. The number of heat exchange tube holes in each row of the rear folding fin is the same. The front folding fin has its top connected to the top of the rear folding fin. The front folding fin has N2 heat exchange tube holes for the heat exchange tubes to pass through. The N2 heat exchange tube holes are arranged in two rows in the direction from the windward side to the leeward side. The number of heat exchange tube holes in each row of the front folding fin is the same. The distance x0 between the dividing point on the rear folding fin and the end of the air conditioner inlet away from the front panel in the width direction of the housing is x0. The dividing point is the intersection of the centerline of the rear folding fin in its extension direction and the top end of the rear folding fin. x0 satisfies: x0≤L / ((N2-2) / (N1+2)+1), x0≥L / ((N2+2) / (N1-2)+1); where L is the width dimension of the air conditioner inlet.

9. The wall-mounted air conditioner indoor unit according to claim 8, characterized in that, In a cross section perpendicular to the length of the housing, the heat exchange tube holes on the rear folding fin and the heat exchange tube holes on the front folding fin are located on opposite sides of a dividing line, which extends along the height of the housing and passes through the dividing point.

10. The wall-mounted air conditioner indoor unit according to claim 8 or 9, characterized in that, The rear folding fins form an inclination angle A with respect to the height of the housing. Wherein, L is the horizontal distance between the dividing point and the connection point, and Pt is the hole spacing of each row of heat exchange tube holes on the rear folded fin.

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