Indoor unit of air conditioner

Abstract

The utility model discloses an air conditioner indoor unit, and belongs to the technical field of air conditioners. The air conditioner indoor unit comprises a fan assembly and a heat exchanger. The fan assembly comprises an impeller and a volute. The heat exchanger is arranged on the air outlet side of the fan assembly, the heat exchanger and the fan assembly are arranged in the first direction, the first direction is perpendicular to the height direction, the upper middle portion of the heat exchanger is opposite to an air outlet of the volute, the heat exchanger comprises a heat exchange pipe and heat exchange fins, and heat exchange reinforcing parts are further arranged on the heat exchange fins. The heat exchange reinforcing part comprises two bent side walls and a connecting wall which are oppositely arranged, and the bent side walls are bent in the thickness direction of the heat exchange fins; the connecting wall is bridged on the two bent side walls; the heat exchange fin comprises a first fin part, a second fin part and a third fin part which are sequentially divided from top to bottom, and the number of the heat exchange reinforcing parts on the first fin part is larger than that of the heat exchange reinforcing parts on the third fin part. According to the air conditioner indoor unit, the heat exchange capacity of the heat exchange fins can be fully utilized.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an indoor air conditioning unit. Background Technology

[0002] An air conditioner indoor unit typically consists of a heat exchanger and a fan assembly. When the fan operates, the airflow is blown towards the heat exchanger, where it exchanges heat before circulating back into the room, thus regulating the indoor air temperature. Air conditioner indoor units often use finned heat exchangers to achieve the heat exchange function of the heat transfer medium. Refrigerant pipes traverse multiple heat exchanger fins arranged side-by-side, increasing the heat exchange area between the refrigerant pipes and the airflow, thereby increasing the amount of heat exchanged. The airflow is blown out by the fan, flows through the gaps between the fins to complete heat exchange, and then is delivered into the room through the air outlet.

[0003] Currently, most heat exchanger fins are in a regular shape, but the airflow from the fan to the fins is non-uniform, which can cause localized excess airflow or waste of heat exchange capacity on the fins. Utility Model Content

[0004] This application provides an indoor air conditioning unit that can fully utilize the heat exchange capacity of the heat exchange fins.

[0005] In one aspect of this application, an indoor air conditioning unit includes: a fan assembly and a heat exchanger.

[0006] A fan assembly is used to drive the flow of air. The fan assembly includes an impeller and a volute, with the volute covering the outside of the impeller.

[0007] The heat exchanger is located on the air outlet side of the fan assembly. The heat exchanger and the fan assembly are arranged along a first direction, which is perpendicular to the height direction. In the first direction, the upper middle part of the heat exchanger is opposite to the air outlet of the volute.

[0008] The heat exchanger includes heat exchange tubes and heat exchange fins. The heat exchange tubes are used to circulate refrigerant; the heat exchange fins have tube holes for the heat exchange tubes to pass through, and the heat exchange fins also have heat exchange reinforcement sections, which include two oppositely arranged bent sidewalls and a connecting wall; the bent sidewalls are bent in the thickness direction of the heat exchange fins; and the end of the bent sidewalls that is furthest from the heat exchange fins is connected to the end of the heat exchange fins.

[0009] The heat exchange fins include a first fin section, a second fin section, and a third fin section, which are divided from top to bottom. The number of heat exchange reinforcement sections on the first fin section is greater than the number of heat exchange reinforcement sections on the third fin section.

[0010] In this technical solution, since the upper and middle parts of the heat exchanger are opposite to the air outlet of the volute, the air velocity at the upper part of the heat exchange fins is greater than that at the lower part of the heat exchange fins. By setting the number of heat exchange reinforcement sections on the first fin part to be greater than that on the third fin part, the heat exchange reinforcement sections can improve the heat exchange capacity of the first fin part to a greater extent than that of the third fin part. This matches the air velocity that is larger at the top and smaller at the bottom, thereby improving the heat exchange capacity of the upper part of the heat exchange fins and avoiding the waste of heat exchange capacity at the lower part of the heat exchange fins.

[0011] In some embodiments, two adjacent heat exchange reinforcement sections are located on both sides of the heat exchange fins, which can allow the air to fully contact the heat exchange reinforcement sections, enhance the local disturbance of the wind field near the heat exchange tube, and thus increase the heat exchange capacity.

[0012] In some embodiments, the area near the junction of the first fin portion and the second fin portion, and the area near the junction of the second fin portion and the third fin portion, are considered bend regions; the bottom of the third fin portion is considered a bottom region; and the other areas on the heat exchange fins, excluding the bend regions and the bottom regions, are considered the main body regions.

[0013] The heat exchange reinforcement section between two adjacent pipe holes forms a heat exchange reinforcement group; the number of heat exchange reinforcement sections in the heat exchange reinforcement group in the bend area is less than the number of heat exchange reinforcement sections in the heat exchange reinforcement group in the main area.

[0014] In this technical solution, the local wind resistance at the bend of the heat exchange fins is relatively large. Reducing the number of heat exchange reinforcement sections in the bend area can reduce the pressure drop of the airflow passing through the heat exchange fins.

[0015] In some embodiments, the area near the junction of the first fin portion and the second fin portion, and the area near the junction of the second fin portion and the third fin portion, are considered bend regions; the bottom of the third fin portion is considered a bottom region; and the other areas on the heat exchange fins, excluding the bend regions and the bottom regions, are considered the main body regions.

[0016] The heat exchange reinforcement section between two adjacent pipe holes forms a heat exchange reinforcement group; no heat exchange reinforcement section is provided in the bottom area, or the number of heat exchange reinforcement sections in the heat exchange reinforcement group in the bottom area is less than the number of heat exchange reinforcement sections in the heat exchange reinforcement group in the main area.

[0017] In this technical solution, the air volume at the bottom of the heat exchange fins is relatively small. Reducing the number of heat exchange reinforcement sections in the bottom area can reduce the pressure drop of the airflow passing through the heat exchange fins. At the same time, it can reduce the obstruction of the heat exchange reinforcement sections to the flow of condensate.

[0018] In some embodiments, the arrangement direction of the two bent sidewalls on the heat exchange reinforcement is parallel to the center lines of the tube holes on its upper and lower sides.

[0019] In some embodiments, the number of heat exchange reinforcement sections in the heat exchange reinforcement group of the first fin portion is m1, the number of heat exchange reinforcement sections in the heat exchange reinforcement group of the second fin portion is m2, and the number of heat exchange reinforcement sections in the heat exchange reinforcement group of the third fin portion is m3, where m1>m2>m3.

[0020] In this technical solution, the first fin section, which is located in the high wind speed zone, has a larger number of heat exchange reinforcement sections, while the third fin section, which is located in the low wind speed zone, has a smaller number of heat exchange reinforcement sections. This can improve the heat exchange efficiency of the first fin section and avoid wasting the heat exchange capacity of the third fin section.

[0021] In some embodiments, the air inlet side profile of the first fin portion extends along the height direction or is inclined from top to bottom toward the direction of approaching the fan assembly, and the air inlet side profiles of the second fin portion and the third fin portion are both inclined from top to bottom toward the direction of approaching the fan assembly.

[0022] The angle γ1 between the air inlet side profile of the first fin and the first direction, the angle γ2 between the air inlet side profile of the second fin and the first direction, and the angle γ3 between the air inlet side profile of the third fin and the first direction, where γ1>γ2>γ3.

[0023] In this technical solution, the air inlet side profile of the heat exchange fins gradually tilts towards the direction of the fan assembly as the height decreases, which makes the angle between the normal direction of each part of the air inlet side profile and the direction of air flow smaller, thereby reducing wind resistance and noise.

[0024] In some embodiments, the first fin portion is V-shaped with the opening facing the windward side, the second fin portion extends along the height direction, and the air inlet side profile of the third fin portion is inclined from top to bottom towards the direction close to the fan assembly.

[0025] In this technical solution, the first fin section is V-shaped, which can increase the heat exchange area of ​​the first fin section. The air inlet side profile of the third fin section is inclined towards the direction of the fan assembly as the height decreases, which can make the angle between the normal direction of each part of the air inlet side profile and the air flow direction smaller, thereby reducing wind resistance and noise.

[0026] In some embodiments, when the fan assembly is running, the wind speed at the junction of the first fin portion and the second fin portion is (1.2~1.4)U. ave The wind speed at the junction of the second and third fin sections is (0.6~0.8)U. ave Among them, U ave It is the average wind speed of the airflow on the front of the heat exchange fins.

[0027] In this technical solution, the heat exchange fins are designed according to the wind speed, which allows each part of the heat exchange fins to match the wind speed.

[0028] Another aspect of this application is an indoor air conditioning unit, comprising: a fan assembly and a heat exchanger.

[0029] A fan assembly is used to drive the flow of air. The fan assembly includes an impeller and a volute, with the volute covering the outside of the impeller.

[0030] The heat exchanger is located on the air outlet side of the fan assembly. The heat exchanger and the fan assembly are arranged along a first direction, which is perpendicular to the height direction.

[0031] The heat exchanger includes heat exchange tubes and heat exchange fins. The heat exchange tubes are used to flow refrigerant; the heat exchange fins are provided with tube holes for the heat exchange tubes to pass through, and the heat exchange fins are also provided with heat exchange reinforcement sections, which include two oppositely arranged bent sidewalls and a connecting wall; the bent sidewalls are bent in the thickness direction of the heat exchange fins; and the end of the bent sidewalls away from the heat exchange fins is connected to the end of the heat exchange fins.

[0032] The heat exchange fins include a first fin section, a second fin section, and a third fin section, which are divided sequentially along the height direction. When the fan assembly is running, the wind speed on the first fin section is greater than that on the third fin section, and the number of heat exchange reinforcement sections on the first fin section is greater than that on the third fin section.

[0033] In this technical solution, the wind speed at the top of the heat exchange fins is greater than that at the bottom of the heat exchange fins. By setting the number of heat exchange reinforcement sections on the first fin section to be greater than that on the third fin section, the heat exchange reinforcement sections can improve the heat exchange capacity of the first fin section to a greater extent than that of the third fin section. This matches the wind speed, which is greater at the top and smaller at the bottom, thereby improving the heat exchange capacity at the top of the heat exchange fins and avoiding the waste of heat exchange capacity at the bottom of the heat exchange fins. Attached Figure Description

[0034] Figure 1 A perspective view of an indoor air conditioning unit according to some embodiments is shown;

[0035] Figure 2 A cross-sectional view of an air conditioner indoor unit according to some embodiments is shown. Figure 1 ;

[0036] Figure 3 A side view of a heat exchanger in an indoor unit of an air conditioner according to some embodiments is shown;

[0037] Figure 4 A cross-sectional view of an indoor air conditioning unit in the prior art is shown;

[0038] Figure 5 A cross-sectional view of an air conditioner indoor unit according to some embodiments is shown. Figure 2 ;

[0039] Figure 6 A side view of heat exchange fins in an indoor air conditioning unit according to some embodiments is shown. Figure 1 ;

[0040] Figure 7 A side view of heat exchange fins in an indoor air conditioning unit according to some embodiments is shown. Figure 2 ;

[0041] Figure 8 A cross-sectional view of an air conditioner indoor unit according to some embodiments is shown. Figure 3 ;

[0042] Figure 9 A side view of heat exchange fins in an indoor air conditioning unit according to some embodiments is shown;

[0043] Figure 10 A cross-sectional view of an indoor air conditioning unit, omitting the heat exchanger, is shown according to some embodiments. Figure 1 ;

[0044] Figure 11 A wind speed-height linear graph is shown;

[0045] Figure 12 A cross-sectional view of an indoor air conditioning unit, omitting the heat exchanger, is shown according to some embodiments. Figure 2 ;

[0046] Figure 13 A cross-sectional view of an indoor air conditioning unit according to some other embodiments is shown;

[0047] Figure 14 A side view of the fan assembly and heat exchanger in an indoor air conditioning unit according to some other embodiments is shown;

[0048] Figure 15 A side view of heat exchange fins in an indoor air conditioning unit according to some other embodiments is shown;

[0049] Figure 16 Example 1 of heat exchange fins in an indoor unit of an air conditioner according to some other embodiments is shown;

[0050] Figure 17 Example 2 shows heat exchange fins in an indoor unit of an air conditioner according to some other embodiments;

[0051] Figure 18 A cross-sectional view of an indoor air conditioning unit according to yet another embodiment is shown;

[0052] Figure 19 A side view of heat exchange fins in an indoor unit of an air conditioner is shown according to yet another embodiment;

[0053] Figure 20 A side view of the fan assembly and heat exchanger in an indoor air conditioning unit according to yet another embodiment is shown;

[0054] Figure 21 A side view of heat exchange fins in an indoor unit of an air conditioner is shown according to yet another embodiment;

[0055] Figure 22 A diagram is shown of a heat exchange enhancement assembly for an indoor air conditioning unit according to some embodiments;

[0056] Figure 23 A front view of a heat exchange enhancement assembly of an indoor air conditioning unit according to some embodiments is shown. Detailed Implementation

[0057] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0058] In the description of this application, 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, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0059] 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. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] Air conditioners execute a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle involves a series of processes including compression, condensation, expansion, and evaporation, supplying refrigerant to the conditioned and heat-exchanged air.

[0062] The compressor compresses refrigerant gas at a low temperature and low pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0063] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its 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.

[0064] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0065] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0066] When an air conditioner has a two-unit structure consisting of an outdoor unit and an indoor unit, the outdoor unit is also called the outdoor unit, and the indoor unit is also called the indoor unit.

[0067] The indoor unit of the air conditioner in this application will be described below with reference to the accompanying drawings:

[0068] Reference Figure 1 and Figure 2 The indoor unit of the air conditioner according to the embodiments of this application includes a housing 10.

[0069] The housing 10 is generally rectangular in shape, forming the appearance of the indoor unit of the air conditioner. The housing 10 includes a bottom plate 11 forming the bottom structure, a top plate 12 forming the top structure, and a side plate connecting the bottom plate 11 and the top plate 12.

[0070] An air outlet 10a is provided on one side plate of the housing 10. An air inlet 10b is provided on the side of the housing 10 opposite to the air outlet 10a, or an air inlet 10b is provided on the side of the bottom plate 11 of the housing 10 away from the air outlet 10a.

[0071] Indoor air enters the housing 10 through the air inlet 10b and returns to the indoor space through the air outlet 10a.

[0072] The indoor air conditioning unit of this application is mainly applicable to ducted air conditioners, but can also be applied to wall-mounted and floor-standing air conditioners.

[0073] The following example uses a ducted air conditioner as an example:

[0074] The ducted air conditioner includes a fan assembly 20. In the current example, the fan assembly is a centrifugal fan.

[0075] A partition 13 may be provided inside the housing 10. The partition 13 divides the space inside the housing 10 into two chambers: an air inlet chamber 141 and an air outlet chamber 142. The air inlet 10b communicates with the air inlet chamber 141, and the air outlet 10a communicates with the air outlet chamber 142. The fan assembly 20 may be disposed inside the air inlet chamber 141. In other embodiments, the fan assembly may be a cross-flow fan, in which case the partition 13 may be omitted from the housing 10.

[0076] The fan assembly 20 includes a volute 21. The axis of the volute 21 is horizontal. Air inlets 21a are provided on the two sides of the volute 21 that are perpendicular to the axis.

[0077] The volute 21 is provided with an air outlet 211, and an air outlet 21b is formed at the end of the air outlet 211. The air outlet 211 is the part that extends outward from the cylindrical part of the volute 21.

[0078] The air outlet 211 of the volute 21 is provided with the middle partition 13, or the air outlet 21b of the volute 21 is opposite to the opening on the middle partition 13, so that the air outlet 21b of the volute 21 is connected to the air outlet cavity 142.

[0079] The fan assembly 20 includes an impeller 22. The impeller 22 is disposed within the volute 21. Specifically, the impeller 22 may be disposed within the cylindrical portion of the volute 21.

[0080] When the fan assembly 20 is running, the impeller 22 rotates, causing indoor air to enter the air inlet chamber 141 through the air inlet 10b, then flow into the volute 21 through the air intake 21a, and continue to be blown into the air outlet chamber 142 through the air outlet 21b of the volute 21, and finally delivered to the room through the air outlet 10.

[0081] The ducted air conditioner includes a heat exchanger 30. The heat exchanger 30 is disposed within the air outlet chamber 142 and located in the air flow path, for exchanging heat with the air passing through it.

[0082] The heat exchanger 30 and the fan assembly 20 are arranged along a first direction. The air outlet chamber 142 and the air inlet chamber 141 are arranged along the first direction. The first direction is the direction from the fan assembly 20 to the heat exchanger 30.

[0083] Reference Figure 3 The heat exchanger 30 can be a tube-fin structure. The heat exchanger 30 has heat exchange tubes 31 and heat exchange fins 32.

[0084] Heat exchange tube 31 is used for the flow of refrigerant; heat exchange fins 32 are installed through heat exchange tube 31 to increase the heat exchange efficiency between refrigerant and air by increasing the surface area of ​​heat exchange tube 31.

[0085] The heat exchange fins 32 can be stamped from a sheet of material such as aluminum foil. Multiple heat exchange fins 32 are stacked at intervals along a second direction. The second direction is a horizontal direction perpendicular to the first direction.

[0086] The airflow generated by the impeller 22 is guided by the volute 21 and flows through the air outlet 21b of the volute 21 to the heat exchanger 30. The air flows through the gap between the heat exchange fins 32 and exchanges heat with the refrigerant flowing in the heat exchange tube 31, the heat exchange fins 32 and the heat exchange tube 31, thereby achieving cooling or heating of the airflow.

[0087] In some embodiments, continue to refer to Figure 2 The air outlet 211 of the volute 21 includes a first diffuser 212 forming the upper wall and a second diffuser 213 forming the lower wall.

[0088] The airflow inside the volute 21 flows out of the air outlet 21b under the guidance of the first diffuser 212 and the second diffuser 213.

[0089] Along the direction of airflow, which is also the direction of airflow from air inlet 141 to air outlet 142, the second diffuser 213 is inclined downward, which can increase the angle range between the first diffuser 212 and the second diffuser 213, thereby increasing the air outlet range of the volute 21, and thus enabling the airflow from the air outlet 21b of the volute 21 to sweep to all parts of the heat exchanger 30.

[0090] In some embodiments, when projected onto a plane perpendicular to the second direction, the outline of the heat exchange fin 32 includes an air inlet side outline 321. The air inlet side outline 321 is the outline of the heat exchange fin 32 that is close to the volute 21 and extends generally vertically.

[0091] The heat exchange fins 32 may include an outlet side profile 322. The outlet side profile 322 is the profile of the heat exchange fins 32 that is furthest from the volute 32. The outlet side profile 322 is also the profile of the heat exchange fins 32 that is closest to the air outlet 10a of the housing 10.

[0092] The heat exchange fins 32 may include a top side profile 323. The top end of the air inlet side profile 321 and the top end of the air outlet side profile 322 are connected by the top side profile 323.

[0093] The heat exchange fins 32 may include a bottom profile line 324. The bottom end of the air inlet profile line 321 and the bottom end of the air outlet profile line 322 are connected by the bottom profile line 324.

[0094] In other words, on the main surface of the heat exchange fin 32 (the main surface is the side with the largest area on the heat exchange fin 32), the outline of the heat exchange fin 32 is formed by connecting the air inlet side outline 321, the top side outline 323, the air outlet side outline 322, and the bottom side outline 324 end to end.

[0095] Normally, the air outlet 21b of the volute 21 is located in the upper-middle part of the housing 10. In the first direction, the air outlet 21b of the volute 21 is opposite to the upper-middle part of the heat exchanger 30. Along the direction of decreasing height, the airflow blowing from the air outlet 21b towards the heat exchanger 30 is inclined downwards and the angle with the first direction gradually increases, that is, as the height decreases, the degree of downward inclination of the airflow gradually increases.

[0096] It should be noted that in other examples, Figure 2 The indoor unit of the air conditioner can be used upside down. The upside down described in this application is a relative concept and should not be used as a limitation on the scope of protection of this application.

[0097] Any type of heat exchanger in the existing technology will significantly obstruct airflow. This is manifested in the large angle between the airflow direction before entering the heat exchanger and the airflow direction after entering the heat exchanger. The resistance of the heat exchanger will force the airflow direction to deflect at a large angle, thereby increasing the air supply resistance.

[0098] by Figure 4 Taking a heat exchanger as an example, since airflow tends to flow in the direction of lowest resistance, the airflow will pass through the heat exchanger along the path of least resistance, i.e., the shortest path, which is the normal direction of the air inlet side profile. When the airflow enters the heat exchanger, it will deflect towards the normal direction of the air inlet side profile, thus causing a large angle deflection in the airflow direction.

[0099] In some embodiments, continue to refer to Figure 2 As the height decreases, the air inlet side profile 321 gradually extends closer to the volute 21, and the angle γ between it and the first direction gradually decreases. This ensures that the angle between the airflow direction entering the heat exchanger 30 and the normal direction of the air inlet side profile 321 of the heat exchanger 30 is small, thereby reducing the wind resistance at the heat exchanger 30.

[0100] It should be noted that when the air intake side profile 321 includes a curve, the angle γ between the curve and the first direction specifically refers to the angle between the tangent of the curve and the first direction.

[0101] It should be noted that the term "gradually" as used in this application refers to an overall trend of change, which can be a continuous change or a segmented change. In a segmented change, "gradually" means change in segments.

[0102] In some embodiments, refer to Figure 5 Let H be the dimension of the air inlet side profile 321 in the height direction, and h be the dimension of the air outlet 21b of the volute 21 in the height direction. Let A be any point on the air inlet side profile 321, and let H0 be the vertical distance from A to the top of the air inlet side profile 321. Let a be a point on the air outlet 21b, and let h0 be the vertical distance from a to the top of the air outlet 21b. Let h0 satisfy: H0 / H = h0 / h.

[0103] The line connecting point A and point a is line Aa. Line Aa can be approximated as the direction of airflow towards heat exchanger 30. The angle α between the normal direction of the air inlet side profile line 321 at point A and line Aa is ≤ 30°.

[0104] The angle α between the normal direction of the air inlet side profile 321 and the airflow direction is the airflow turning angle. By controlling α within 30°, this application achieves the matching of the air inlet side profile 321 of the heat exchanger 30 with the airflow direction. Through the smooth design of the flow field, the air supply resistance can be reduced, which can be reduced by 10% compared with the heat exchanger of the prior art; at the same time, air turbulence is reduced and air supply noise is lowered.

[0105] As an example of continuous change, refer to Figure 2 , Figures 5-9 The air intake side profile 321 is arc-shaped.

[0106] As an example of segmented change, refer to Figures 13 to 17 The air inlet side profile 321 includes at least two segments divided along the height reduction direction. Along the height reduction direction, the angle between each segment of the air inlet side profile and the first direction decreases sequentially.

[0107] In some embodiments, the inlet side profile is divided according to wind speed:

[0108] When the fan assembly 20 is running under standard operating conditions, a wind speed-height diagram can be obtained by measuring or simulating the wind speed (incoming wind speed) of the heat exchanger 30.

[0109] Reference Figure 10 and Figure 11 If we take the height of each part of the heat exchanger 30 as the horizontal axis and the wind speed U as the vertical axis, the relationship between the wind speed U and the height of each part of the heat exchanger 30 can be expressed as a wind speed-height linear line.

[0110] In the wind speed-height linear line, the maximum wind speed Umax is located at height H3, which is close to the top of heat exchanger 30.

[0111] In the wind speed-height diagram, the wind speed U gradually increases from height 0 to H3. Since the wind speed at height H is close to Umax, it can be concluded that the wind speed generally increases with increasing height. The wind speed at the upper part of heat exchanger 30 is greater than the wind speed at the lower part of heat exchanger 30.

[0112] The wind speed at height H1 is U1 = (0.6~0.8)Uave, and the wind speed at height H2 is U2 = (1.2~1.4)Uave. Where Uave is the average wind speed.

[0113] In this application, the area with wind speed greater than U2 is called the high wind speed area, the area with wind speed between U1 and U2 is called the medium wind speed area, and the area with wind speed less than U1 is called the low wind speed area.

[0114] For example, U1 = 2 m / s, U2 = 6.5 m / s. The wind speed in the high-wind-speed area is greater than 6.5 m / s. The wind speed in the medium-wind-speed area is between 2 m / s and 6.5 m / s, and the wind speed in the low-wind-speed area is less than 2 m / s.

[0115] Reference Figure 12 The dividing line between high-wind-speed and medium-wind-speed areas is F1, and the dividing line between medium-wind-speed and low-wind-speed areas is F2.

[0116] After determining the dividing lines F1 and F2 of the inlet side profile based on the high, medium, and low wind speed regions, the distance x between the heat exchanger and the volute outlet is determined according to the heat exchanger spatial layout. The angle α between the airflow direction in front of the heat exchanger and the airflow direction in the heat exchanger should be less than 30°, and the angle between the inlet side profile and the airflow direction needs to be greater than 60°. From this, the maximum depression angle and maximum elevation angle of the upper inlet side profile can be obtained. The upper inlet side profile needs to be designed between the two lines. Taking into account factors such as the airflow direction, heat exchanger depth, maximum turning angle of the airflow direction, and the trend of heat exchanger width variation, the angle γ1 between the upper inlet side profile and the first direction is determined. After determining the upper inlet side profile, the angles of the middle and lower inlet side profiles are determined downwards to obtain the overall inlet side profile.

[0117] Therefore, the air inlet side profile 321 includes three segments divided along the height reduction direction: the first air inlet side profile 321a, the second air inlet side profile 321b, and the third air inlet side profile 321c.

[0118] The dividing line between the first section of the air inlet side contour line 321a and the second section of the air inlet side contour line 321b is F1, and the dividing line between the second section of the air inlet side contour line 321b and the third section of the air inlet side contour line 321c is F2.

[0119] The first section of the air inlet side profile line 321a is located at the upper part of the heat exchange fin 32, the second section of the air inlet side profile line 321b is located at the middle part of the heat exchange fin 32, and the third section of the air inlet side profile line 321c is located at the lower part of the heat exchange fin 32.

[0120] The second section of the air inlet side profile 321b connects the first section of the air inlet side profile 321a and the third section of the air inlet side profile 321c.

[0121] In some embodiments, refer to Figure 14 Line Q1 is defined as a line that passes through the air outlet of the second diffuser 213 and is parallel to the first direction. Line Q2 is an extension of the inner wall of the second diffuser 213. The connection point of the second section air inlet side profile line 321b and the third section air inlet side profile line 321c is located between line Q1 and line Q2.

[0122] Line Q3 is defined as the angle bisector of the angle between the first diffuser 212 and the second diffuser 213. Line Q4 is a line that passes through the midpoint of the air outlet 21b and is parallel to the first direction. The connection point of the first air inlet side profile line 321a and the second air inlet side profile line 321b is located between line Q3 and line Q4.

[0123] In some embodiments, refer to Figure 15 The angles γ1, γ2, and γ3 between the first air inlet side profile 321a and the first direction, the second air inlet side profile 321b and the first direction, and the third air inlet side profile 321c and the first direction decrease sequentially. That is, γ1>γ2>γ3.

[0124] In some embodiments, the first air inlet side profile 321a is a straight line segment. The angle γ1 between the first air inlet side profile 321a and the first direction is 70° to 90°. The first air inlet side profile 321a is approximately vertical.

[0125] Within this angular range, γ1 ensures that the angle α between the normal direction of the first section of the air inlet side profile 321a and the airflow direction is small, thereby ensuring that the airflow direction on the windward side of the upper part of the heat exchanger 30 does not deviate by a large angle from the airflow direction after entering the heat exchanger 30, thus reducing air supply resistance and noise.

[0126] In some embodiments, γ1 = 85° to 90°, and the first section of the air inlet side profile 321a is almost vertical, which makes the heat exchange fins 32 more compact in the first direction. If γ1 is in the range of 70° to 85°, and the first section of the air inlet side profile 321a is tilted at a small angle, the size of the heat exchange fins 32 in the first direction will increase.

[0127] In some embodiments, the third air inlet side profile 321c is a straight line segment. The third air inlet side profile 321c slopes from top to bottom toward the air inlet side (near the fan assembly 20).

[0128] The angle γ3 between the third section air inlet side profile 321c and the first direction is 30° to 60°. Within this angle range, γ3 ensures that the angle α between the normal direction of the third section air inlet side profile 321c and the airflow direction is small, thus ensuring that the airflow direction on the windward side of the lower part of the heat exchanger 30 does not deviate significantly from the airflow direction after entering the heat exchanger 30, thereby reducing air supply resistance and noise.

[0129] If γ3 is large, the inclination of the third air inlet side profile 321c will be large, resulting in a relatively large size of the heat exchanger 30 in the first direction. If γ3 is small, the inclination of the third air inlet side profile 321c will be small, and its effect on reducing wind resistance will be weakened. Therefore, as a preferred embodiment, the angle γ3 between the third air inlet side profile 321c and the first direction is 40° to 45°. Within this range, wind resistance can be reduced while ensuring that the size of the heat exchanger 30 is not too large.

[0130] In some embodiments, the second air inlet side profile 321b is a straight line segment. The angle γ2 between the second air inlet side profile 321b and the first direction is 50° to 80°. Within this angle range, γ2 ensures that the angle α between the normal direction of the second air inlet side profile 321b and the airflow direction is small, thereby ensuring that the airflow direction on the windward side of the middle of the heat exchanger 30 does not deviate significantly from the airflow direction after entering the heat exchanger 30, thus reducing air supply resistance.

[0131] In some embodiments, the second air inlet side profile 321b is an arc segment. The second air inlet side profile 321b extends from top to bottom toward the direction close to the fan assembly 20.

[0132] The angle between the second air intake side profile line 321b and the first direction is the angle between the tangent direction of the second air intake side profile line 321b and the first direction.

[0133] As the height decreases, the angle between the second air intake side profile 321b and the first direction gradually decreases.

[0134] In some embodiments, the second air inlet side contour line 321b is tangentially connected to the first air inlet side contour line 321a and the third air inlet side contour line 321c, respectively. That is, the upper end of the second air inlet side contour line 321b is tangent to the lower end of the first air inlet side contour line 321a, and the lower end of the second air inlet side contour line 321b is tangent to the upper end of the third air inlet side contour line 321c.

[0135] In some embodiments, the connection between the first air inlet side profile 321a and the second air inlet side profile 321b is made by a rounded transition.

[0136] The connection between the second air inlet side profile line 321b and the third air inlet side profile line 321c is made by a rounded corner transition. The size of the rounded corner can be between 5mm and 20mm.

[0137] The rounded corner design makes the air inlet side profile 321 of the heat exchange fins 32 smooth and flat at the corners.

[0138] The smooth connection of the three contour lines can reduce local wind resistance and reduce lateral disturbance and mixing of the wind field. On the other hand, it is conducive to the downward flow of condensate, avoids local accumulation of condensate, and further improves the heat exchange effect.

[0139] In some embodiments, when the rate of change of the incoming flow velocity in the height direction of the second air inlet side profile 321b is greater than 0.1, the second air inlet side profile 321b adopts an arc segment; when the rate of change of the incoming flow velocity in the height direction of the second air inlet side profile 321b is less than or equal to 0.1, the second air inlet side profile 321b adopts a straight segment.

[0140]

[0141] V1 is the wind speed at the upper end of the second air inlet side profile 321b, V2 is the wind speed at the lower end of the second air inlet side profile 321b, and ΔZ is the length of the second air inlet side profile 321b in the height direction.

[0142] If Rv>0.1, the rate of change of wind speed is relatively large. The use of an arc in the second section of the air inlet side profile 321b can, to some extent, avoid the generation of local vortices in the wind field and reduce local wind resistance, thereby increasing heat exchange.

[0143] If Rv≤0.1, the rate of change of wind speed is small. The second section of the air inlet side contour line 321b can be made into a straight line to facilitate processing and cutting, and improve production efficiency.

[0144] In addition to considering the direction of airflow, it is also necessary to consider the matching between airflow rate and heat exchange capacity of heat exchanger 30. Since the upper middle part of heat exchanger 30 is closer to the air outlet 21b than the lower part of heat exchanger 30, the airflow velocity to the upper middle part of heat exchanger 30 is greater than the airflow velocity to the lower part of heat exchanger 30.

[0145] If all parts of heat exchanger 30 have the same heat exchange capacity, at high air velocities, the inlet and outlet temperature difference of heat exchanger 30 will decrease due to the increased mass flow rate, resulting in insufficient heat exchange. At low air velocities, the inlet and outlet temperature difference of heat exchanger 30 will increase as the mass flow rate decreases. When the air-side outlet temperature approaches the refrigerant temperature inside the pipe, the outlet temperature will no longer change, meaning the inlet and outlet temperature difference will remain essentially constant after approaching its upper limit, leading to wasted heat exchange capacity. Therefore, in high-air-velocity areas, the heat exchange capacity of the heat exchanger needs to be increased, while in low-air-velocity areas, the heat exchange capacity can be appropriately reduced. This avoids insufficient and wasted heat exchange capacity, improves the utilization efficiency of heat exchange capacity, and achieves the effect of increasing heat exchange capacity while reducing material usage.

[0146] Since the wind speed flowing through the upper part of the heat exchanger 30 is greater than that flowing through the lower part of the heat exchanger 30, the local heat exchange capacity of the upper part of the heat exchanger 30 needs to be increased, while the local heat exchange capacity of the lower part of the heat exchanger 30 needs to be appropriately reduced.

[0147] In some embodiments, the width W of the heat exchange fins 32 gradually decreases as the height decreases. The width of the heat exchange fins 32 refers to the width of the heat exchange fins 32 in the normal direction of the air inlet side profile line 321.

[0148] The upper part of the heat exchange fins 32 is wider, which increases the heat exchange capacity of the upper part of the heat exchanger 30. The lower part of the heat exchange fins 32 is narrower, which avoids wasting the heat exchange capacity of the lower part of the heat exchanger 30. Therefore, in this application, the width of the heat exchange fins 32 gradually decreases as the height decreases, which can fully utilize the heat exchange capacity of the heat exchanger 30 and improve the heat exchange performance.

[0149] In some embodiments, the trend of change of the air outlet side profile 322 is generally the same as that of the air inlet side profile 321, that is, the extension direction of the air outlet side profile 322 is generally the same as that of the air inlet side profile 321. As the height decreases, the air outlet side profile 322 gradually extends towards the volute 21, and the angle γ with the first direction gradually decreases.

[0150] In some embodiments, the outlet side profile 322 can be obtained by translating the inlet side profile 321 along a first direction. After translation, the overlap between the outlet side profile 322 and the inlet side profile 321 can be greater than 90%.

[0151] Except for the top and bottom portions, the air outlet contour line 322 of the heat exchange fin 32 can be aligned with the air inlet contour line 321 after translation along the first direction, with an overlap rate of over 90%. This design facilitates the cutting of the heat exchange fin 32, greatly improving processing efficiency; on the other hand, it significantly reduces waste generated during processing, which helps to lower the initial investment in materials.

[0152] In some embodiments, the bottom end of the air inlet profile 321 is connected to the bottom side profile 324 by an arc, and the top end of the air inlet profile 321 is connected to the top side profile 323 by an arc. The top end of the air outlet profile 322 is connected to the top side profile 323 by an arc.

[0153] Reference Figure 6 and Figure 7 Since the angle γ between the inlet side profile 321 and the first direction gradually decreases with decreasing height, it can be inferred that the angle δ between the normal direction of the inlet side profile 321 and the first direction gradually increases. Furthermore, since the inlet side profile 321 and the outlet side profile 322 have the same horizontal distance L, the larger δ is, the shorter the width. Therefore, it can be concluded that the width of the heat exchange fins 32 gradually decreases with decreasing height.

[0154] Points B1, B2, and B3 are taken on the upper, middle, and lower parts of the air intake side contour line 321, respectively.

[0155] On the heat exchange fin 32, the width at B1 is W1, the horizontal width at B1 is L, and the angle between the width direction at B1 and the horizontal width direction is 61°; the width at B2 is W2, the horizontal width at B2 is L, and the angle between the width direction at B2 and the horizontal width direction is 62°; the width at B3 is W3, the horizontal width at B3 is L, and the angle between the width direction at B3 and the horizontal width direction is 63°.

[0156] Since the angle γ between the tangent of the air intake side profile 321 at B1, B2, and B3 and the horizontal width direction decreases successively, it can be known that δ1 < δ2 < 63, and thus W1 > W2 > W3.

[0157] Therefore, in this embodiment, the air outlet side contour line 322 is obtained by translating the air inlet side contour line 321 along the first direction, which can realize the form of the heat exchange fins 32 being wider at the top and narrower at the bottom, matching the trend of the wind speed being larger at the top and smaller at the bottom, thereby improving the heat exchange capacity of the upper part of the heat exchanger 30 while avoiding the waste of the heat exchange capacity at the bottom of the heat exchanger 30.

[0158] In some embodiments, the upper part of the heat exchange fin 32 is located in the high wind speed region, the middle part of the heat exchange fin 32 is located in the medium wind speed region, and the lower part of the heat exchange fin 32 is located in the low wind speed region. The width of the lower part of the heat exchange fin 32 is reduced by 10% to 30% compared to the average width. The width of the upper part of the heat exchange fin 32 is increased by 10% to 30% compared to the average width. Wherein, the average width = heat exchange area of ​​the heat exchange fin / length of the air inlet side profile 321.

[0159] This configuration allows the width variation of the heat exchange fins 32 to match the high, medium, and low wind speed zones: the heat exchanger 30 is wider in the high wind speed zone and narrower in the low wind speed zone. This not only improves the heat exchange capacity of the upper part of the heat exchanger 30 but also avoids wasting the heat exchange capacity at the bottom of the heat exchanger 30.

[0160] In some embodiments, refer to Figure 15 The heat exchange fin 32 includes a first fin portion 32a located on the upper side of F1, a second fin portion 32b located between F1 and F2, and a third fin portion 32c located on the lower side of F2.

[0161] The first fin portion 32a is located at the upper part, the second fin portion 32b is located in the middle part, and the third fin portion 32c is located at the lower part.

[0162] The widths of the first fin portion 32a, the second fin portion 32b, and the third fin portion 32c decrease sequentially.

[0163] The width of the first fin portion 32a is W1, the width of the second fin portion 32b is W2, and the width of the third fin portion 32c is W3. W1>W2>W3.

[0164] The air velocity flowing through the first fin section 32a is greater than that flowing through the second fin section 32b, and the air velocity flowing through the second fin section 32b is greater than that flowing through the third fin section 32c. The upper width of the heat exchange fin 32 is larger than its lower width, matching the trend of the air velocity decreasing from top to bottom. This allows for increased heat exchange capacity in high-velocity areas and appropriately reduced heat exchange capacity in low-velocity areas, avoiding insufficient or wasted heat exchange capacity, improving the utilization efficiency of heat exchange capacity, and achieving the effect of increasing capacity or reducing material consumption. Therefore, this application increases the heat exchange capacity per unit area of ​​the heat exchange fin 32 while reducing unnecessary fin material consumption and space occupation.

[0165] According to an embodiment of this application, the angle between the first fin portion 32a and the first direction is γ1, the angle between the second fin portion 32b and the first direction is γ2, and the angle between the third fin portion 32c and the first direction is γ3.

[0166] In some embodiments, the horizontal width of the heat exchange fins 32 along the first direction is between 35 mm and 55 mm. Within this width range, both the heat exchange capacity and air resistance of the heat exchanger 30 can be balanced.

[0167] If the width of the heat exchange fins 32 is larger, the heat exchange capacity will be better, but the air resistance generated by the heat exchanger 30 will be larger. If the width of the heat exchange fins 32 is smaller, although the air resistance generated by the heat exchanger 30 will be smaller, its heat exchange capacity will not be guaranteed.

[0168] In some embodiments, the width W1 of the first fin portion 32a is 10% to 30% greater than the average width of the heat exchange fin 32.

[0169] The airflow velocity in the first fin section 32a is relatively high, and the width W1 of the first fin section 32a is larger than the average width of the heat exchange fins 32, which can improve the heat exchange capacity of the upper part of the heat exchanger 32.

[0170] In some embodiments, the width W3 of the third fin portion 32c is reduced by 10% to 30% compared to the average width of the heat exchange fin 32.

[0171] The airflow velocity is lower in the third fin section 32c, and the width W3 of the third fin section 32a is smaller than the average width of the heat exchange fin 32. This can reduce the heat exchange capacity of the lower part of the heat exchange fin 32, reduce the amount of aluminum foil material used, and avoid wasting the heat exchange capacity of the lower part of the heat exchange fin 32.

[0172] In one specific example, the first air inlet side profile 321a is vertically oriented, i.e., γ1 = 90°. The second air inlet side profile 321b forms an angle γ2 = 65° with the first direction. The third air inlet side profile 321c forms an angle γ3 = 50° with the first direction.

[0173] The horizontal width of the heat exchange fin 32 is 45mm. The width W1 of the first fin section 32a is 45mm, the width W2 of the second fin section 32b is 40.5mm, and the width W3 of the third fin section 32c is 34.5mm.

[0174] The average width of the heat exchange fins 32 is 39.5 mm. The width of the first fin portion 32a is 14% greater than the average width, while the width of the third fin portion 32c is 13% less than the average width.

[0175] In some embodiments, refer to Figure 8 The first diffuser 212 is tilted downwards by β1 relative to the first direction. β1 = 0° to 5°. The slight downward tilt of the first diffuser 212 by β1 can make the air field at the top of the air outlet 21b tilt slightly downwards, avoiding the top air field from blowing directly onto the heat exchange fins 32 and generating greater wind resistance.

[0176] Projected onto a plane perpendicular to the second direction, the inner extension line of the first diffuser 212 is LP1, and the angle between LP1 and the first direction is β1.

[0177] When β1 is small, there is less of the portion of heat exchanger 30 located above LP1, which makes the wind speed at the top of heat exchanger 30 not much different from the maximum wind speed flowing through heat exchanger 30, thus ensuring that the wind speed at the top of heat exchanger 30 is relatively large.

[0178] If β1 is large, the portion of heat exchanger 30 located above LP1 will be larger, resulting in a significant reduction in the air velocity at the top of heat exchanger 30 compared to the maximum air velocity flowing through it. Given a fixed top width of heat exchanger 30, this reduction in air velocity leads to wasted heat exchange capacity. In this case, if the width of the top of heat exchanger 30 is reduced to avoid this waste, then the heat exchange fins 32 need to be configured as follows: Figure 9 This form will increase the processing difficulty of heat exchange fins 32.

[0179] In some embodiments, the second diffuser 213 is inclined downwards by β2 relative to the first direction. β2 = 16° to 45°. Within this angle range, the uniformity of airflow velocity can be ensured as much as possible.

[0180] In some embodiments, the included angle θ between the extension lines of the first diffuser 212 and the second diffuser 213 is 15° to 40°, which can ensure the air outlet range.

[0181] In some embodiments, unlike the embodiments described above, reference is made to... Figures 18 to 21 The first section of the air inlet side profile 321a is curved, which makes the upper part of the heat exchange fin 32 curved, thereby increasing the heat exchange area of ​​the upper part of the heat exchange fin 32 and improving the heat exchange capacity of the upper part of the heat exchange fin 32.

[0182] In some embodiments, the first air inlet side profile 321a is V-shaped, with the open end of the V-shape facing the air inlet side.

[0183] In some embodiments, the third air inlet side profile 321c is inclined from top to bottom toward the direction close to the fan assembly 20, and the angle between the third air inlet side profile 321c and the first direction is γ3. γ3 = 45° to 60°.

[0184] In some embodiments, the second air inlet side profile 321b can be a straight line segment perpendicular to the first direction, that is, the second air inlet side profile 321b extends along the height direction.

[0185] In some embodiments, the air outlet side profile line may extend in the same direction as the air inlet side profile line.

[0186] The first fin portion 32a at the top of the heat exchange fin 32 is V-shaped. The second fin portion 32b in the middle of the heat exchange fin 32 extends along the height direction. The third fin portion 32c at the bottom of the heat exchange fin 32 slopes downwards towards the fan assembly 20.

[0187] In this application, the width of the heat exchange fin 32 is wider in the middle and narrower at the top and bottom. Because the upper part of the heat exchange fin 32 is V-shaped, the heat exchange area at the top of the heat exchange fin 32 is increased, thereby improving the heat exchange capacity of the upper part of the heat exchange fin 32. The narrower width of the third fin portion 32c reduces the heat exchange performance of the lower part of the heat exchange fin 32, avoiding waste of the heat exchange capacity in the lower part of the heat exchange fin 32. Therefore, this application ensures the area of ​​the region with larger airflow on the heat exchange fin 32 while reducing the area of ​​the region with smaller airflow, which is beneficial for improving the utilization rate of the heat exchange fin 32, enhancing heat exchange performance, saving energy consumption, and reducing material waste in the region with smaller airflow, thus helping to reduce material costs.

[0188] In some embodiments, the first air inlet side profile 321a includes a V-shaped profile segment one and a profile segment two, wherein the profile segment one is located below the profile segment two.

[0189] The angle γ1 between the first segment of the contour line and the first direction is 15-30°. Within a certain height range, the smaller the V-angle, the larger the area of ​​the heat exchange fins 32. Within this range, γ1 maximizes the heat exchange area while ensuring a reasonable pressure drop.

[0190] In some embodiments, refer to Figure 18 and Figure 19 The centerline of the heat exchange fin 32 parallel to the first direction is Lp3, and the distance from line Lp3 to the top of the heat exchange fin 32 is the same as the distance from line Lp3 to the bottom of the heat exchange fin 32.

[0191] The midpoint of line segment ST, where line Lp3 intersects with heat exchange fin 32, is O.

[0192] The distance from point P on the windward side of heat exchange fin 32 in the first direction to point O is R, where R is the vertical distance from the air outlet 21b of fan assembly 20 to point O.

[0193] The distance from the endpoints of the first air inlet side contour line 321a, the second air inlet side contour line 321b, and the third air inlet side contour line 321c to point P is Ri, where 0.8 ≤ Ri / R ≤ 1.2.

[0194] Specifically, the top endpoint of the first air inlet side profile 321a is denoted as A, the bottom endpoint of the first air inlet side profile 321a is denoted as B, the top endpoint of the third air inlet side profile 321c is denoted as C, and the bottom endpoint of the third air inlet side profile 321c is denoted as D. The length of the line connecting point P to point A is R1, the length of the line connecting point P to point B is R2, the length of the line connecting point P to point C is R3, and the length of the line connecting point P to point D is R4.

[0195] 0.8≤R1 / R≤1.2; 0.8≤R2 / R≤1.2; 0.8≤R3 / R≤1.2; 0.8≤R4 / R≤1.2.

[0196] If 0.8 > Ri / R, then the position of Ri corresponding to the heat exchange fin 32 is too close to the air outlet 21b of the fan assembly 20. The airflow from the air outlet 21b will directly impact the heat exchange fin 32, resulting in uneven airflow distribution, increased system pressure drop, and poor local heat exchange effect on the heat exchange fin 32.

[0197] For example, if i = 1 and 0.8 > R1 / R, then the top of the heat exchange fin 32 is too close to the air outlet 21b; if i = 4, then the bottom of the heat exchange fin 32 is too close to the air outlet 21b.

[0198] With a value of 0.8≤Ri / R, the distance between the air inlet side of the heat exchange fin 32 and the air outlet 21b of the fan assembly 20 will not be too close, which can improve the uniformity of airflow distribution on the heat exchange fin 32 and ensure the heat exchange effect of each part of the heat exchange fin 32.

[0199] If Ri / R>1.2, the air inlet side of the heat exchange fin 32 is too far from the air outlet 21b of the fan assembly 20. The airflow from the air outlet 21b will attenuate before reaching the heat exchange fin 32, reducing the heat exchange efficiency.

[0200] Within the range of 0.8≤Ri / R≤1.2, the distance between the air inlet side of the heat exchange fins 32 and the air outlet 21b of the fan assembly 20 can be prevented from being too close or too far.

[0201] In some embodiments, refer to Figure 20 The angle between the inner extensions of the first diffuser 212 and the second diffuser 213 is θ, and the angle between the first diffuser 212 and the first direction is β1.

[0202] The endpoint of the inner contour line of the first diffuser 212 at the air outlet 21b is E, and the endpoint of the inner contour line of the second diffuser 213 at the air outlet 21b is F. The intersection point of the extension lines of the first diffuser 212 and the second diffuser 213 is J, and the foot of the perpendicular from point J to the air outlet 21b is point K. The length of line segment JF is L2, the length of line segment JK is L1, and the length of line segment KF is L. KF .

[0203]

[0204] That is, 0.8 ≤ R / L KF ≤1.2.

[0205] If 0.8 > R / L KFThe distance between the heat exchange fins 32 and the air outlet 21b of the fan assembly 20 is too close. The airflow from the air outlet 21b does not have enough space to be evenly distributed before reaching the heat exchange fins 32, resulting in uneven airflow distribution on the heat exchange fins 32 and poor heat exchange effect in some areas of the heat exchange fins 32.

[0206] 0.8≤R / L KF This ensures that the distance between the heat exchange fins 32 and the air outlet 21b of the fan assembly 20 is not too close, and that the airflow from the air outlet 21b has enough space to be evenly distributed before reaching the heat exchanger 30, thus guaranteeing the heat exchange effect of each part on the heat exchange fins 32.

[0207] If R / L KF >1.2 The distance from the heat exchange fins 32 to the air outlet 21b of the fan assembly 20 is too far, and the airflow at the air outlet 21b is severely attenuated, which will affect the heat exchange efficiency between the airflow and the heat exchange fins 32.

[0208] R / L KF With a value of ≤1.2, the distance between the heat exchange fins 32 and the air outlet 21b of the fan assembly 20 will not be too far, and the airflow from the air outlet 21b can quickly reach the heat exchange fins 32, thus ensuring heat exchange efficiency.

[0209] In some embodiments, the length h of the air outlet 21b of the fan assembly 20 in the height direction satisfies:

[0210]

[0211] In some embodiments, the height dimension of the air outlet 21b of the fan assembly 20 is h, and the height dimension of the heat exchange fins 32 is H. 0.4≤h / H≤0.6.

[0212] If 0.4 > h / H, then the ratio of the height dimension h of the air outlet 21b of the fan assembly 20 to the height dimension H of the heat exchange fin 32 is relatively small. Under the condition that the height dimension h of the air outlet 21b of the fan assembly 20 is fixed, the height dimension H of the heat exchange fin 32 is relatively large, and the overall heat exchange area of ​​the heat exchange fin 32 is relatively large, which can meet the unit's requirements for the heat exchange efficiency of the heat exchange fin 32.

[0213] However, the height dimension H of the heat exchange fin 32 is relatively large, and the airflow blown out of the air outlet 21b takes a long time to spread to the upper and lower ends of the heat exchange fin 32. As a result, the upper and lower ends of the heat exchange fin 32 are not fully utilized, resulting in a waste of the heat exchange performance of the heat exchange fin 32.

[0214] The large height dimension H of the heat exchange fins 32 will result in an increased size of the unit in the vertical direction. In installation situations with limited ceiling space, the unit will not be able to be installed and used, thus limiting its application. In addition, the larger size of the unit will also increase material costs.

[0215] If 0.4 ≤ h / H, then the ratio of the height h of the air outlet 21b of the fan assembly 20 to the height H of the heat exchange fins 32 will not be too small. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is fixed, the height H of the heat exchange fins 32 will not be too high. Therefore, the range of applications for the unit is relatively large, and the structural dimensions of the unit are relatively compact, which can reduce costs.

[0216] If h / H>0.6, then the ratio of the height h of the air outlet 21b of the fan assembly 20 to the height H of the heat exchange fin 32 is relatively large. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is fixed, the height H of the heat exchange fin 32 is relatively small, and the overall heat exchange area of ​​the heat exchange fin 32 is relatively small. This will result in a relatively slow heat exchange efficiency of the heat exchange fin 32, which cannot meet the user's demand for rapid cooling / heating.

[0217] If h / H≤0.6, then the ratio of the height h of the air outlet 21b of the fan assembly 20 to the height H of the heat exchange fin 32 will not be too large. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is fixed, the height H of the heat exchange fin 32 will not be too small, so that the heat exchange area of ​​the heat exchange fin 32 can meet the user's requirements for the cooling / heating rate.

[0218] The ratio of the height h of the air outlet 21b of the fan assembly 20 to the height H of the heat exchange fins 32 is within the range of 0.4≤h / H≤0.6. This ratio allows the unit to have a relatively compact structure while meeting the heat exchange efficiency requirements of the heat exchange fins 32.

[0219] In some embodiments, the height h of the air outlet 21b of the fan assembly 20 satisfies: 80mm≤h≤100mm, and the height H of the heat exchange fins 32 satisfies: 160mm≤H≤180mm.

[0220] In some embodiments, refer to Figure 20 The minimum vertical distance Lm from heat exchange fin 32 to air outlet 21b satisfies:

[0221]

[0222] The closest point on the heat exchange fin 32 to the air outlet 21b is the bottom end of the heat exchange fin 32. If the distance between the bottom end of the heat exchange fin 32 and the air outlet 21b is too close, the airflow from the air outlet 21b will not reach the bottom of the heat exchange fin 32, resulting in the bottom of the heat exchange fin 32 not being fully utilized. If the distance between the bottom end of the heat exchange fin 32 and the air outlet 21b is too far, the tilt angle of the lower part of the heat exchange fin 32 relative to its height is relatively small, and the effect of reducing wind resistance will be weakened.

[0223] In some embodiments, refer to Figure 14 The minimum vertical distance Lm from heat exchange fin 32 to air outlet 21b satisfies:

[0224]

[0225] In the above formula, Uave is the average wind speed of the airflow on the heat exchange fin 32, 15°≤θ≤20°.

[0226] The size of Lm significantly affects the heat exchange effect. If Lm is too small, meaning the heat exchanger 30 is too close to the air outlet 21b of the fan assembly 20, the airflow will pass through the heat exchanger 30 before it has a chance to spread upwards and downwards. This results in localized heat exchange between the heat exchange fins 32 and the supply air, leading to insufficient heat exchange, excessive local wind speed, high wind resistance, and high noise. If Lm is too large, meaning the heat exchanger 30 is too far from the air outlet 21b of the fan assembly 20, the unit will be too large, resulting in material waste and making it unsuitable for installation and use in space-constrained environments.

[0227] Therefore, this application calculates Lm according to the above formula, which can make Lm within a reasonable size range, ensuring sufficient heat exchange between the heat exchange fins 32 and the air supply, and also avoiding excessive unit size.

[0228] In some embodiments, the minimum distance from the air outlet 21b of the fan assembly 20 to the heat exchange fins 32 is Lm, which satisfies the following condition: 70mm≤Lm≤110mm.

[0229] In some embodiments, the minimum distance from the air outlet 21b of the fan assembly 20 in the first direction to the heat exchange fins 32 is Lm, where 0.7 ≤ h / Lm ≤ 1.4.

[0230] If 0.7 > h / Lm, then the ratio of the height h of the air outlet 21b of the fan assembly 20 to the minimum distance Lm from the air outlet 21b to the heat exchange fins 32 is small. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is constant, the minimum distance Lm from the air outlet 21b to the heat exchanger 30 is large. Therefore, the heat exchanger 30 is far from the air outlet 21b, which will result in a large size of the unit in the first direction, an excessively large unit volume, and material waste.

[0231] If 0.7 ≤ h / Lm, then the ratio of the height h of the air outlet 21b of the fan assembly 20 to the minimum distance Lm from the air outlet 21b to the heat exchange fin 32 will not be too small. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is constant, the minimum distance Lm from the air outlet 21b to the heat exchange fin 32 will not be too large. The unit is relatively compact in the first direction, which reduces material costs.

[0232] If h / Lm>1.4, the ratio of the height h of the air outlet 21b of the fan assembly 20 to the minimum distance Lm from the air outlet 21b to the heat exchange fin 32 is relatively large. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is fixed, the minimum distance Lm from the air outlet 21b to the heat exchange fin 32 is relatively small. In this case, the heat exchange fin 32 is relatively close to the air outlet 21b, which will cause the airflow at the air outlet 21b to pass through the heat exchange fin 32 before it has a chance to spread to the upper and lower sides. This will result in insufficient heat exchange between the heat exchange fin 32 and the air supply, as well as problems such as excessive local wind speed, high wind resistance, and high noise.

[0233] With h / Lm ≤ 1.4, the ratio of the height h of the air outlet 21b of the fan assembly 20 to the minimum distance Lm from the air outlet 21b to the heat exchanger 30 will not be too large. Under the condition that the height h of the air outlet 21b of the fan assembly 20 is constant, the minimum distance Lm from the air outlet 21b to the heat exchange fins 32 will not be too small, so that the airflow from the air outlet 21b can flow through all parts of the heat exchange fins 32, thereby making full use of the heat exchange fins 32, ensuring the heat exchange efficiency at the heat exchange fins 32, and the airflow velocity after passing through the heat exchange fins 32 is relatively uniform, reducing wind resistance and noise.

[0234] With a value of 0.7≤h / Lm≤1.4, the heat exchange fins 32 can be fully utilized while ensuring a relatively compact unit structure, thus guaranteeing heat exchange efficiency and reducing wind resistance and noise.

[0235] <Arrangement of 325mm bore>

[0236] In some embodiments, refer to Figure 16 , Figure 17 and Figure 21 The heat exchange fin 32 is provided with a tube hole 325 that extends along the thickness direction (second direction) of the heat exchange fin 32 for the heat exchange tube 31 to pass through.

[0237] In some embodiments, refer to Figure 16 and Figure 17 The widths W1 of the first fin portion 32a, W2 of the second fin portion 32b, and W3 of the third fin portion 32c decrease sequentially, i.e., W1>W2>W3.

[0238] The number of orifices 325 per unit area on the first fin portion 32a is greater than the number of orifices 325 per unit area on the second fin portion 32b. The number of orifices 325 per unit area on the first fin portion 32a is greater than the number of orifices 325 per unit area on the third fin portion 32c.

[0239] The density of the tube holes 325 on the first fin portion 32a is greater than the density of the tube holes 325 on the second fin portion 32b.

[0240] The density of the tube holes 325 on the first fin portion 32a is greater than the density of the tube holes 325 on the third fin portion 32c.

[0241] The denser the arrangement of the tube holes 325, the denser the arrangement of the heat exchange tubes 31, and the stronger the heat exchange capacity. A higher density of the tube holes 325 in the first fin section 32a can increase the heat exchange capacity of that section.

[0242] The airflow distribution of the incoming airflow field of the heat exchange fin 32 is "larger at the top and smaller at the bottom". Since the heat exchange tubes 31 on the first fin section 32a are arranged relatively densely, the possibility and impact of excessive airflow in the upper part of the heat exchange fin 32 can be reduced, thereby improving the heat exchange efficiency of the heat exchange fin 32.

[0243] In some embodiments, refer to Figure 16 The number of holes 325 on the first fin portion 32a, the number of holes 325 on the second fin portion 32b, and the number of holes 325 on the third fin portion 32c decrease sequentially.

[0244] The number of holes 325 on the first fin portion 32a is greater than the number of holes 325 on the second fin portion 32b, and the number of holes 325 on the second fin portion 32b is greater than the number of holes 325 on the third fin portion 32b.

[0245] That is, the number of tube holes 325 in the upper part of the heat exchange fin 32 is greater than the number of tube holes 325 in the middle part of the heat exchange fin 32, and the number of tube holes 325 in the middle part of the heat exchange fin 32 is greater than the number of tube holes 325 in the lower part of the heat exchange fin 32.

[0246] For example, the number of tube holes 325 in the upper, middle and lower parts of the heat exchange fin 32 are 11.5, 10.5 and 10, respectively.

[0247] The variation trend of the upper tube holes 325 of the heat exchange fins 32 with more holes at the top and fewer holes at the bottom matches the variation trend of the wind speed with more holes at the top and fewer holes at the bottom. This can fully utilize the heat exchange capacity of the heat exchanger 30 and avoid wasting the heat exchange capacity.

[0248] In some embodiments, refer to Figure 16The first fin portion 32a has n rows of tube holes 325, the second fin portion 32b has a mixture of n rows and n-1 rows of tube holes 325, and the third fin portion 32c has n-1 rows of tube holes 325.

[0249] Because the number of rows of holes 325 in the first fin portion 32a is relatively large, the holes 325 in the first fin portion 32a can be relatively dense.

[0250] Because the number of rows of holes 325 in the third fin portion 32a is relatively small, the holes 325 in the third fin portion 32c can be relatively sparse.

[0251] For example, the first fin portion 32a has three rows of tube holes 325, the second fin portion 32b has a mix of three rows and two rows of tube holes 325, and the third fin portion 32c has two rows of tube holes 325.

[0252] In some embodiments, refer to Figure 17 The heat exchange fins 32 are provided with multiple rows of pipe holes 325 arranged along the first direction. In the current example, the heat exchange fins 32 are provided with two rows of pipe holes 325, wherein one row of pipe holes 325 can be overlapped with the other row of pipe holes 325 after being translated along the first direction.

[0253] In some embodiments, refer to Figure 17 On the first fin portion 32a, any two adjacent pipe holes 325 in the same row of pipe holes 325 constitute a pipe hole group. There exists at least one pipe hole group in which the angle between the line connecting the centers of two pipe holes 325 and the first section of the air inlet side contour line 321a is α, and α is not greater than 50°. In this way, the pipe holes 325 can be arranged more closely in the height direction, and the heat exchange between the heat exchange tubes 31 passing through adjacent pipe holes 325 does not affect each other.

[0254] When the length of the connecting line between adjacent pipe holes 325 in the same row is the same, the connecting line forms an angle with the first section of the air inlet side contour line 321a, which can reduce the length of these two pipe holes 325 in the extension direction of the first section of the air inlet side contour line 321a, thereby allowing more pipe holes 325 to be arranged in the vertical direction and increasing the density of the pipe hole arrangement.

[0255] For example, in Figure 17 If the pipe holes 325 are arranged along the extension direction (height direction) of the first air inlet side profile 321a on the first fin portion 32a, four pipe holes 325 can be arranged under the same interval conditions. However, if the ① and ③ pipe holes, the ⑤ and ⑦ pipe holes, and the ⑦ and ⑨ pipe holes are arranged with their relative height directions tilted, five pipe holes 325 can be arranged.

[0256] In some embodiments, 20° ≤ λ ≤ 50°. If λ is too small, it is impossible to achieve the arrangement of vertically arranging an additional tube hole 325 on the first fin portion 32a.

[0257] In some embodiments, refer to Figure 17 The changing trend of the center line connecting the same row of pipe holes 325 on the second fin section 32b is roughly the same as the changing trend of the second section air inlet side profile line 321b, which can effectively avoid air mixing, disturbance and local vortex perpendicular to the incoming flow direction, thereby reducing wind resistance and noise.

[0258] Specifically, the center line connecting the same row of pipe holes 325 on the second fin portion 32b can be roughly parallel to the second air inlet side profile line 321b.

[0259] In some embodiments, refer to Figure 17 The changing trend of the center line connecting the same row of pipe holes 325 on the third fin section 32c is roughly the same as the changing trend of the third section air inlet side profile line 321c. This can effectively avoid air mixing, disturbance and local vortex perpendicular to the incoming flow direction, thereby reducing wind resistance and noise.

[0260] Specifically, the center line connecting the same row of pipe holes 325 on the third fin portion 32c can be roughly parallel to the third section air inlet side contour line 321c.

[0261] In some embodiments, refer to Figure 17 Taking any of the pipe holes 325 in the same row as the target pipe hole, the reference line Lp4 is the line of the air inlet side contour line 321b translated along the first direction and close to the target pipe hole. The center of the target pipe hole on the second fin portion 32b and the third fin portion 32c is located on the reference line Lp4, or the center of the target pipe hole on the second fin portion 32b and the third fin portion 32c is distributed near the reference line Lp4.

[0262] Specifically, the distance from the center of the target hole on the second fin portion 32b and the third fin portion 32c to the reference line Lp4 is not greater than the radius of the hole 325.

[0263] In some embodiments, the connecting line of the same row of pipe holes 325 on the second fin portion 32b is inclined from top to bottom toward the direction close to the fan assembly 20, and the angle between the connecting line and the height direction is 62°.

[0264] The center line connecting the same row of pipe holes 325 on the third fin section 32c is inclined from top to bottom towards the direction closer to the fan assembly 20, and the angle between the center line and the height direction is 63°. 63° > 62°.

[0265] In this way, the center line connecting the pipe holes 325 of the second fin portion 32b and the third fin portion 32c is roughly parallel to the corresponding air inlet side profile line, which can effectively avoid air mixing, disturbance and local vortex perpendicular to the incoming flow direction, thereby reducing wind resistance and noise.

[0266] In some embodiments, refer to Figure 21 The number of tube holes 325 on the first fin portion 32a is greater than the number of tube holes 325 on the third fin portion 32c.

[0267] In the diagram, the first fin portion 32a has 12 tube holes 325, and the third fin portion 32c has 10 tube holes 325.

[0268] The large number of tube holes 325 on the first fin section 32a can increase the heat exchange capacity of the first fin section 32a.

[0269] In some embodiments, refer to Figure 21 On the second fin portion 32b, any two adjacent pipe holes 325 in the same row of pipe holes 325 form a pipe hole group. There exists at least one group of pipe holes 325 where the angle between the line connecting the centers of two pipe holes 325 and the second air inlet side contour line 321b (height direction) is α, and α is not greater than 50°. In this way, the pipe holes 325 can be arranged more closely in the height direction, and the heat exchange between adjacent heat exchange tubes 31 does not affect each other.

[0270] Because the second fin portion 32b has a larger width, more tube holes 325 can be arranged on the second fin portion 32 to improve the heat exchange effect of the second fin portion 32.

[0271] In some embodiments, refer to Figure 21 The centers of the target holes on the first fin portion 32a and the third fin portion 32c are located on the reference line Lp4, or the centers of the target holes on the first fin portion 32a and the third fin portion 32c are distributed near the reference line Lp4.

[0272] Specifically, the distance from the center of the target hole on the first fin portion 32a and the third fin portion 32c to the reference line Lp4 is not greater than the radius of the hole 325.

[0273] In some embodiments, refer to Figure 17 The center distance between adjacent holes 325 in the same row is b, and the center distance between holes 325 in different rows in the first direction is a, where a > b.

[0274] With b≥13mm and a≥15mm, heat exchange interference between adjacent heat exchange tubes 31 can be avoided.

[0275] With b≤20mm and a≤22mm, more pipe holes can be arranged within a certain space.

[0276] In some embodiments, a = 18-20 mm, b = 13-15 mm. This ensures a denser arrangement of the tube holes 325 and avoids heat exchange interference between adjacent heat exchange tubes 31.

[0277] <Heat Exchange Enhancement Section 326>

[0278] In some embodiments, refer to Figure 16 , Figure 17 , Figure 19 , Figure 21 , Figure 22 The heat exchange fins 32 are provided with multiple heat exchange reinforcement sections 326, which can improve the heat transfer coefficient and enhance the heat exchange capacity of the heat exchange fins 32.

[0279] The heat exchange fins 32 have openings, and the heat exchange reinforcement 326 is connected to the openings of the heat exchange fins 32. The heat exchange reinforcement 326 includes two bent sidewalls 3261 that bend from the edges of the openings toward the thickness direction of the heat exchange fins 32, and the two bent sidewalls 3261 are arranged opposite to each other.

[0280] The heat exchange reinforcement 326 includes a connecting wall 3262 bridging the two bent sidewalls 3261, such that the heat exchange reinforcement 326 resembles a bridge on the heat exchange fins 32.

[0281] The connecting wall 3262 is connected to the end of the two bent sidewalls 3262 that is away from the heat exchange fins 32.

[0282] In some embodiments, refer to Figure 16 , Figure 17 and Figure 21 The heat exchange enhancement section 326 can be set between two adjacent tube holes 325 in the same row.

[0283] The length of the heat exchange reinforcement section 326 is generally parallel to the line connecting the centers of its two adjacent upper and lower tube holes 325. The length of the heat exchange reinforcement section 326 is the same as the arrangement direction of the two bent sidewalls 3261.

[0284] In some embodiments, a heat exchange reinforcement portion 326 may be provided below the bottommost tube hole 325 on the heat exchange fin 32. For example, Pipe and A heat exchange enhancement section 326 is provided on the lower side of the tube hole.

[0285] The length direction of the heat exchange reinforcement part 326 at the lowest end of the heat exchange fin 32 is generally parallel to the air outlet side profile 322 corresponding to the first direction.

[0286] In some embodiments, the heat exchange fins 32 do not have a heat exchange reinforcement portion 326 at the bottom. For example, Pipe and No heat exchange reinforcement section 326 is provided on the lower side of the tube hole.

[0287] Since the bottom of the heat exchanger 30 is located in the lowest wind speed zone, this part does not require strong heat exchange capacity. Therefore, the heat exchange reinforcement section 326 can be omitted in this part. In addition, the absence of the heat exchange reinforcement section 326 at the bottom can improve the drainage capacity of the heat exchanger 30 and avoid the heat exchange reinforcement section 326 obstructing the downward flow of condensate on the heat exchanger 30.

[0288] In some embodiments, the connection line between the heat exchange reinforcement 326 and the heat exchange fin 32 is an arc, and the center of the arc coincides with the center of the adjacent tube hole 325.

[0289] Specifically, the connection line between the upper end of the heat exchange reinforcement section 326 and the heat exchange fin 32 is a first arc line, and the center of the first arc line coincides with the center of the adjacent upper tube hole 325.

[0290] The connection line between the lower end of the heat exchange reinforcement section 326 and the heat exchange fin 32 is a second arc line, and the center of the second arc line coincides with the center of the adjacent lower tube hole 325.

[0291] In some embodiments, the minimum distance between the edge of the heat exchange reinforcement 326 and the edge of the pipe hole 325 is not less than 0.3 mm, which can prevent the heat exchange reinforcement 326 from being too close to the pipe hole 325 and thus avoid increasing local wind resistance.

[0292] In some embodiments, the radius of the first arc and / or the radius of the second arc are controlled to be above 4 mm.

[0293] In some embodiments, taking any orifice 325 as a reference target, the heat exchange reinforcement portion 326 located below and adjacent to the orifice 325 constitutes a heat exchange reinforcement group. Each heat exchange reinforcement group may include multiple heat exchange reinforcement portions 326. The multiple heat exchange reinforcement portions 326 are arranged along the width direction of the heat exchange reinforcement portion 326. The width direction of the heat exchange reinforcement portion 326 is perpendicular to its length direction.

[0294] In the same heat exchange reinforcement group, the connecting wall 3262 of two adjacent heat exchange reinforcement sections 326 is located on both sides of the heat exchange fin 32.

[0295] That is, the bending directions of the bent sidewalls 3261 of two adjacent heat exchange reinforcement sections 326 are opposite. In this way, they can fully contact the air, enhance the local turbulence of the air field near the heat exchange tube 31, and thus increase the heat exchange.

[0296] In some embodiments, the number of heat exchange enhancement portions 326 in the first fin portion 32a is greater than the number of heat exchange enhancement portions 326 in the third fin portion 32c. In this way, the heat exchange capacity of the first fin portion 32a can be improved by the heat exchange enhancement portions 326, avoiding waste of airflow in the upper part of the heat exchanger 30. At the same time, the degree to which the heat exchange enhancement portions 326 improve the heat exchange capacity of the third fin portion 32c is less than the degree to which they improve the heat exchange capacity of the first fin portion 32a, thus avoiding waste of the heat exchange capacity of the third fin portion 32c.

[0297] In some embodiments, the number of heat exchange reinforcement sections 326 in the first fin portion 32a, the second fin portion 32b, and the third fin portion 32c decreases sequentially. This results in a progressively decreasing degree of improvement in the heat exchange capacity of the heat exchange reinforcement sections 326 on the first fin portion 32a, the second fin portion 32b, and the third fin portion 32c, which matches the wind speed flow field with a larger upper section and a smaller lower section, thereby improving the heat exchange capacity of the heat exchange fins 32 while avoiding waste of heat exchange capacity.

[0298] In some embodiments, each heat exchange reinforcement group on the first fin portion 32a has m1 heat exchange reinforcement sections 326, each heat exchange reinforcement group on the second fin portion 32b has m2 heat exchange reinforcement sections 326, and each heat exchange reinforcement group on the third fin portion 32c has m3 heat exchange reinforcement sections 326. m1>m2>m3.

[0299] For example, m1 = 4, m2 = 3, m3 = 2.

[0300] In some embodiments, the area near the connection between the first fin portion 32a and the second fin portion 32b, and the area near the connection between the second fin portion 32b and the third fin portion 32c are considered bend areas, the bottom of the third fin portion 32c is considered a bottom area, and the other areas on the heat exchange fin 32, excluding the bend areas and the bottom areas, are the main body areas.

[0301] The number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group in the turning area is less than the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group in the main area.

[0302] In some embodiments, when the dividing line (F1 and / or F2) passes through the pipe hole 325, the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group adjacent to the lower side of the dividing line is less than the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group of the main area.

[0303] Reference Figure 17 Dividing line F1 passes through Pipe and Pipe hole, Pipe and Between pipe holes Pipe and The heat exchange reinforcement group between the tube holes has two heat exchange reinforcement sections 326. The heat exchange reinforcement group in the main body area has four heat exchange reinforcement sections 326.

[0304] In some embodiments, when the dividing line passes through the heat exchange reinforcement group, the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group adjacent to the lower side of the dividing line is less than the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group of the main area.

[0305] Reference Figure 17 Dividing line F2 passes through Pipe and The heat exchange enhancement group between the tube holes, and after Pipe and Enhanced heat exchange between pipe holes. Pipe and Between pipe holes Pipe and The heat exchange reinforcement group between the tube holes has two heat exchange reinforcement sections 326, and the heat exchange reinforcement group in the main area has four heat exchange reinforcement sections 326.

[0306] In some embodiments, when the dividing line passes through a heat exchange reinforcement group, the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group through which the dividing line passes is less than the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group of the main body region.

[0307] Reference Figure 21 Dividing line F1 passes through Pipe and The heat exchange enhancement group between the tube holes, and after Pipe and Enhanced heat exchange between pipe holes. Pipe and Heat exchange enhancement group between tube holes Pipe and The heat exchange enhancement assembly between the tube holes has two heat exchange enhancement sections 326.

[0308] Dividing line F2 passes through Pipe and The heat exchange enhancement group between the tube holes, and after Pipe and Enhanced heat exchange between pipe holes. Pipe and Heat exchange enhancement group between tube holes Pipe and The heat exchange enhancement assembly between the tube holes has two heat exchange enhancement sections 326.

[0309] Near the junction of the first fin portion 32a and the second fin portion 32b, and near the junction of the second fin portion 32b and the third fin portion 32c, these locations roughly correspond to the bends of the air inlet side profile line 321 in the first direction. Since the local wind resistance at the bends of the air inlet side profile line 321 is relatively large and the heat exchange effect is poor, reducing the number of heat exchange reinforcement portions 326 at these locations can reduce the pressure drop of the airflow passing through the heat exchange fins 32 and reduce noise.

[0310] In some embodiments, on the heat exchange fins 32, the number of heat exchange reinforcement sections 326 in the bottom region of the heat exchange reinforcement group is less than the number of heat exchange reinforcement sections 326 in the main region of the heat exchange reinforcement group.

[0311] The number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group on both sides of the bottom end tube hole 325 of the heat exchange fin 32 is less than the number of heat exchange reinforcement sections 326 in the heat exchange reinforcement group of the main area.

[0312] Reference Figure 17 and Figure 21 , The upper and lower sides of the tube hole and The heat exchange reinforcement assemblies on the upper and lower sides of the tube hole have two heat exchange reinforcement sections 326.

[0313] The bottom airflow of the heat exchange fin 32 is relatively small, and a large heat exchange capacity is not required. Reducing the number of heat exchange reinforcement sections 326 at this location can reduce the pressure drop of the airflow passing through the heat exchange fin 32 and reduce noise.

[0314] In some embodiments, refer to Figure 22 and Figure 23 The length n of the heat exchange reinforcement section 326 is (4.5~8) mm; the width n3 of the heat exchange reinforcement section 326 is (1.1~1.3) mm.

[0315] In some embodiments, the heat exchange reinforcement group includes four heat exchange reinforcement sections 326. The length of the long side of the heat exchange reinforcement section 326 is n1 = (6~8) mm, and the length of the short side of the heat exchange reinforcement section 326 is n2 = (4.5~6.5) mm.

[0316] In some embodiments, in the second direction, the distance t from the connecting wall 3262 of the heat exchange reinforcement 326 to the heat exchange fin 32 is (0.5~0.65) mm, that is, the distance t from the heat exchange reinforcement 326 to the heat exchange fin 32.

[0317] In some embodiments, the distance t1 by which the heat exchange reinforcement portion 326 protrudes from the heat exchange fin 32 on the first fin portion 32a, the distance t2 by which the heat exchange reinforcement portion 326 protrudes from the heat exchange fin 32 on the second fin portion 32b, and the distance t3 by which the heat exchange reinforcement portion 326 protrudes from the heat exchange fin 32 on the third fin portion 32c decreases sequentially, i.e., t1>t2>t3.

[0318] The greater the wind speed, the greater the distance that the heat exchange reinforcement section 326 protrudes from the heat exchange fins 32, which can maximize the heat exchange capacity of the heat exchange fins 32 while maintaining a reasonable pressure drop.

[0319] 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.

[0320] 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. An air conditioner indoor unit characterized by comprising: The application relates to a fan assembly for driving air flow, which comprises: a fan wheel; a volute covering the fan wheel; a heat exchanger arranged on the air outlet side of the fan assembly, wherein the heat exchanger and the fan assembly are arranged along a first direction which is perpendicular to the height direction, the upper middle part of the heat exchanger is opposite to the air outlet of the volute in the first direction, and the heat exchanger comprises: heat exchange tubes for flowing refrigerant; heat exchange fins provided with tube holes for the heat exchange tubes, wherein the heat exchange fins are further provided with heat exchange reinforcing parts, and the heat exchange reinforcing parts comprise: two opposite bending side walls which are bent towards the thickness direction of the heat exchange fins; a connecting wall connected to the end of the bending side wall away from the heat exchange fins. The heat exchange fins comprise a first fin part, a second fin part and a third fin part which are sequentially divided from top to bottom, and the number of heat exchange reinforcing parts on the first fin part is greater than that on the third fin part. The two heat exchange reinforcing parts are located on the two sides of the heat exchange fins. 2.The indoor unit of the air conditioner according to claim 1, characterized by, The connection part of the first fin part and the second fin part, the connection part of the second fin part and the third fin part are bending areas; the bottom of the third fin part is a bottom area; and the other areas of the heat exchange fins except the bending areas and the bottom area are main body areas. 3.The indoor unit of the air conditioner according to claim 1, characterized by, The heat exchange reinforcing parts between the upper and lower adjacent tube holes form a heat exchange reinforcing group; and the number of heat exchange reinforcing parts in the heat exchange reinforcing group of the bending area is less than that in the heat exchange reinforcing group of the main body area. The connection part of the first fin part and the second fin part, the connection part of the second fin part and the third fin part are bending areas; the bottom of the third fin part is a bottom area; and the other areas of the heat exchange fins except the bending areas and the bottom area are main body areas. 4.The indoor unit of the air conditioner according to claim 1, characterized by, The heat exchange reinforcing parts between the upper and lower adjacent tube holes form a heat exchange reinforcing group; and the bottom area is not provided with heat exchange reinforcing parts, or the number of heat exchange reinforcing parts in the heat exchange reinforcing group of the bottom area is less than that in the heat exchange reinforcing group of the main body area. The arrangement direction of the two bending side walls on the heat exchange reinforcing part is parallel to the line connecting the tube holes on the upper and lower sides of the heat exchange reinforcing part. 5.The indoor unit of the air conditioner according to claim 1, characterized by, The number of heat exchange reinforcing parts in the heat exchange reinforcing group of the first fin part is m1, the number of heat exchange reinforcing parts in the heat exchange reinforcing group of the second fin part is m2, and the number of heat exchange reinforcing parts in the heat exchange reinforcing group of the third fin part is m3, wherein m1>m2>m3. 6.The indoor unit of the air conditioner according to claim 1, characterized by, The air inlet side contour line of the first fin part extends along the height direction or is inclined from top to bottom towards the direction close to the fan assembly, and the air inlet side contour lines of the second fin part and the third fin part are both inclined from top to bottom towards the direction close to the fan assembly. 7.The indoor unit of the air conditioner according to any one of claims 1-6, wherein ​ An included angle γ1 between a profile line of the first fin portion on the air inlet side and the first direction, an included angle γ2 between a profile line of the second fin portion on the air inlet side and the first direction, an included angle γ3 between a profile line of the third fin portion on the air inlet side and the first direction, γ1>γ2>γ3.

8. The air conditioning indoor unit according to any one of claims 1-6, characterized in that, The first fin portion is in a V shape with an opening facing the windward side, the second fin portion extends along the height direction, and the profile line of the third fin portion on the air inlet side is inclined from top to bottom towards the direction close to the fan assembly. 9.The indoor unit of the air conditioner according to claim 1, characterized by, When the fan assembly is running, the windward wind speed at the connection of the first fin part and the second fin part is (1.2-1.4)U ave , the windward wind speed at the connection of the second fin part and the third fin part is (0.6-0.8)U ave ; wherein U ave is the average wind speed of the windward airflow of the heat exchange fin.

10. An air conditioner indoor unit characterized by comprising: Comprise: A fan assembly for driving air flow, the fan assembly comprising: An impeller; A volute covering the impeller; A heat exchanger arranged on the air outlet side of the fan assembly, the heat exchanger and the fan assembly being arranged along a first direction perpendicular to the height direction, the heat exchanger comprising: A heat exchange tube for circulating refrigerant; A heat exchange fin provided with a tube hole for the heat exchange tube, the heat exchange fin further being provided with a heat exchange reinforcing portion, the heat exchange reinforcing portion comprising: Two oppositely arranged bent side walls bent towards the thickness direction of the heat exchange fin A connecting wall connected to one end of the bent side wall away from the heat exchange fin; Wherein, the heat exchange fin comprises a first fin portion, a second fin portion and a third fin portion sequentially divided along the height direction, the wind speed of the first fin portion on the windward side is greater than that of the third fin portion on the windward side when the fan assembly is running, and the number of heat exchange reinforcing portions on the first fin portion is greater than that on the third fin portion.

Images