Hanging type air conditioner indoor unit

Abstract

The utility model discloses a hanging type air conditioner indoor unit, and relates to the technical field of air conditioners. The hanging type air conditioner indoor unit comprises a machine shell, a heat exchange fan and a heat exchanger. The heat exchange fan and the heat exchanger are arranged in the machine shell. The heat exchanger comprises a first fin and a second fin; the first fins are arranged close to the rear side of the machine shell. The second fins are arranged close to the front side of the machine shell. The upper ends of the second fins face the air inlet of the machine shell and make contact with the upper ends of the first fins, the middle portions of the second fins are bent towards the front side of the machine shell, and the lower ends of the second fins are arranged towards the bottom of the machine shell. Each second fin comprises a fin body and a protruding part, and the protruding parts are arranged on the fin bodies. The fin body comprises a first subarea and a second subarea; the first subarea is located at the upper end of the leeward side of the fin body and the lower end of the windward side of the fin body. The second subarea is located at the lower end of the leeward side of the fin body and the upper end of the windward side of the fin body; and the number of each group of lug bosses on the first subarea is greater than that of each group of lug bosses on the second subarea.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to a wall-mounted air conditioner indoor unit. BACKGROUND

[0002] The heat exchanger is a key component of the air conditioner indoor unit, which is mainly responsible for heat transfer and exchange. The heat exchanger in the air conditioner outdoor unit cooperates with the heat exchanger in the air conditioner indoor unit, through the circulation of refrigerant, to realize heat transfer, and together complete the refrigeration or heating cycle of the air conditioner, to ensure efficient and stable operation of the air conditioning system.

[0003] In the wall-mounted air conditioner indoor unit, the heat exchanger is usually a three-fold structure, in which the first-fold heat exchanger is arranged close to the rear side of the cabinet, the second-fold heat exchanger and the third-fold heat exchanger are arranged close to the front side of the cabinet, the upper end of the second-fold heat exchanger and the upper end of the first-fold heat exchanger are in contact with each other at a position close to the air inlet of the cabinet, and the lower end of the second-fold heat exchanger and the upper end of the third-fold heat exchanger are in contact with each other. Due to the limited internal space of the cabinet, the connection of each evaporator is not consistent with the total width of the fins, so that the resistance of the evaporator along the tube spacing direction is different, the wind speed distribution on the windward side is uneven, the heat exchange efficiency of the part with low wind speed is low, and the overall heat exchange effect of the evaporator is poor. In addition, the second connection between the second-fold evaporator and the third-fold evaporator is prone to air flow short circuit, and the air in this part does not pass through the heat exchanger and is mixed with the air passing through the heat exchanger, resulting in condensate water and causing water blowing problems. Moreover, the angle between the second-fold evaporator and the third-fold evaporator is completed by bending, so that the second connection has wrinkles, and the condensate water generated by the second-fold evaporator is difficult to flow down at the wrinkles, causing the condensate water to accumulate at this position, affecting the heat exchange effect.

[0004] Therefore, in the prior art, the three-fold structure heat exchanger cannot well meet the heat exchange requirements of the wall-mounted air conditioner indoor unit. Practical new type content

[0005] In view of the deficiencies in the related art, the present application provides a wall-mounted air conditioner indoor unit, which is designed by integrally forming the fins of the second-fold heat exchanger and the fins of the third-fold heat exchanger to avoid condensate water accumulation at the connection between the second-fold heat exchanger and the third-fold heat exchanger, and different numbers of ventilation parts are arranged in different areas of the fins according to the flow rate of the air flow to make the heat exchange of the heat exchanger uniform.

[0006] The present application provides a wall-mounted air conditioner indoor unit, which comprises:

[0007] A cabinet, the top of the cabinet is provided with an air inlet of the cabinet, and the lower front side of the cabinet is provided with an air outlet of the cabinet;

[0008] A heat exchange fan is arranged in the cabinet.

[0009] The heat exchanger is arranged in the machine shell, the leeward side of the heat exchanger is arranged towards the heat exchange fan, and the windward side of at least part of the heat exchanger is arranged towards the air inlet of the machine shell.

[0010] The first fin is arranged close to the rear side of the machine shell, is arranged upwards and towards the front side of the machine shell, and the upper end of the first fin is arranged towards the air inlet of the machine shell.

[0011] The second fin is arranged close to the front side of the machine shell, the upper end of the second fin is arranged towards the air inlet of the machine shell and is in contact with the upper end of the first fin, the middle part of the second fin is bent towards the front side of the machine shell, and the lower end of the second fin is arranged towards the bottom of the machine shell.

[0012] The fin body comprises:

[0013] The first sub-area is located at the upper end of the leeward side of the fin body and the lower end of the windward side of the fin body.

[0014] The second sub-area is located at the lower end of the leeward side of the fin body and the upper end of the windward side of the fin body.

[0015] The protruding part is arranged on the fin body, and the protruding parts are arranged in groups on the first sub-area and the second sub-area.

[0016] The number of the protruding parts in each group on the first sub-area is greater than the number of the protruding parts in each group on the second sub-area.

[0017] The upper end of the second fin is arranged towards the air inlet of the machine shell and is in contact with the upper end of the first fin, the middle part of the second fin is bent towards the front side of the machine shell, and the lower end of the second fin is arranged towards the bottom of the machine shell, so as to replace the second and third folded heat exchangers in the prior art, and avoid the problem that the second and third folded heat exchangers in the prior art are prone to condensate water at the connection position.

[0018] In some embodiments, the first sub-area and the second sub-area are respectively provided with protruding parts on both sides of the fin body.

[0019] The protruding parts are arranged on both sides of the second fin along the arrangement direction of the second fin, so that the heat exchange on both sides of the second fin is uniform, and the heat exchange effect of the second fin is increased.

[0020] In some embodiments, the number of each group of protrusions on the first partition is 4-6, and the number of each group of protrusions on the second partition is 3-4.

[0021] The number of each group of protrusions on the first partition is 4-6, and the number of each group of protrusions on the second partition is 3-4, so that the first partition and the second partition have better heat exchange effect.

[0022] In some embodiments, the second fins are arranged in multiple, and the multiple second fins are arranged along the length direction of the heat exchanger.

[0023] In some embodiments, the end surface of the protrusion and the fin body have a gap therebetween to jointly define a ventilation portion for air to pass through.

[0024] In some embodiments, the fin body further comprises a third partition located at the lower end of the leeward side of the fin body and the lower end of the leeward side of the first fin; the number of each group of protrusions on the third partition is 0-2, which is less than the number of each group of protrusions on the second partition.

[0025] The number of protrusions on the third partition is less than that on the second partition, the flow rate of the airflow flowing through the second partition is greater than that flowing through the third partition, and on this basis, a larger number of protrusions are arranged in the second partition with a higher flow rate, and a smaller number of protrusions are arranged in the third partition with a relatively lower flow rate, so that efficient heat exchange can be achieved in areas with different airflow conditions, thereby increasing the heat exchange capacity of the second fins.

[0026] In some embodiments, the fin body comprises a fourth partition located at the bending portion of the windward side of the fin body; the fourth partition comprises a first sub-block and a second sub-block, the first sub-block is located above the second sub-block, the number of each group of protrusions on the first sub-block is less than the number of each group of protrusions on the second partition, and the number of each group of protrusions on the second sub-block is the same as the number of each group of protrusions on the second partition.

[0027] The fourth partition comprises a first sub-block and a second sub-block, a larger number of protrusions are arranged in the lower part of the fourth partition with a higher flow rate, and a smaller number of protrusions are arranged in the upper part of the fourth partition with a relatively lower flow rate, so that efficient heat exchange can be achieved in areas with different airflow conditions, thereby increasing the heat exchange capacity of the second fins.

[0028] In some embodiments, the distance from the windward side to the leeward side of the fin body is the width of the fin body; the fin body comprises an upper part and a lower part, and the width of the upper part is greater than the width of the lower part.

[0029] The second fin has high strength and sufficient heat exchange area.

[0030] In some embodiments, the upper portion has a width W1, W1 satisfies: W1≥11mm, W1≤15mm; the lower portion has a width W3, W3 and W1 satisfy: W3≥0.7W1, W3≤0.9W1.

[0031] In the technical solution, W3 and W1 satisfy: W3≥0.7W1, W3≤0.9W1, the air resistance of the lower portion of the second fin is appropriately reduced, the air speed in the area is improved, and sufficient heat exchange area and structural strength are ensured.

[0032] In some embodiments, the connection between the upper portion and the lower portion is free of a notch, the leeward side of the upper portion is defined to form a first plane, the leeward side of the lower portion is defined to form a second plane, the second plane and the first plane are defined to form an included angle α, and the included angle α satisfies: α≥135°, α≤145°.

[0033] In the technical solution, the connection between the upper portion and the lower portion of the fin body is free of a notch, so as to avoid condensate water from gathering at the connection between the upper portion and the lower portion; the second plane and the first plane are defined to form an included angle α, and the included angle α satisfies: α≥135°, α≤145°, so that the heat exchanger has a larger heat exchange area under the same machine shell space, and the heat exchange effect of the heat exchanger is improved.

[0034] In the above embodiments, the indoor unit of the ceiling-mounted air conditioner is designed by integrally forming the fins of the second folded heat exchanger and the fins of the third folded heat exchanger in the prior art, so as to avoid condensate water from gathering at the connection between the second folded heat exchanger and the third folded heat exchanger; and different numbers of ventilation portions are arranged in different areas of the second fin according to the flow speed of the air flow, so that the heat exchanger has good heat exchange effect and uniform heat exchange. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic diagram of an embodiment of the indoor unit of the ceiling-mounted air conditioner in the present application;

[0036] Figure 2 is a structural schematic diagram of an embodiment of the indoor unit of the ceiling-mounted air conditioner in the present application;

[0037] Figure 3 is a structural schematic diagram of a heat exchanger in the prior art;

[0038] Figure 4 is a structural schematic diagram of a heat exchanger in an embodiment of the indoor unit of the ceiling-mounted air conditioner in the present application;

[0039] Figure 5 is a partitioned schematic view of a heat exchanger in one embodiment of the indoor hanging air conditioner of the present application;

[0040] Figure 6 is a structural schematic view of a fin in one embodiment of the indoor hanging air conditioner of the present application;

[0041] Figure 7 is a partial enlarged view of A in Figure 6

[0042] Figure 8 is a sectional view of A-A in Figure 7

[0043] Figure 9 is a sectional view of B-B in Figure 7

[0044] Figure 10 is a partial enlarged view of B in Figure 6

[0045] Figure 11 is a sectional view of C-C in Figure 10

[0046] Figure 12 is a structural schematic view of a fin in another embodiment of the indoor hanging air conditioner of the present application;

[0047] Figure 13 is a partial enlarged view of C in Figure 12

[0048] Figure 14 is a sectional view of D-D in Figure 13

[0049] Figure 15 is a sectional view of E-E in Figure 13

[0050] is a partial enlarged view of D in Figure 16 Figure 12

[0051] is a sectional view of E-E in Figure 17 Figure 16 is an angle schematic view of the first fin and the second fin in one embodiment of the indoor hanging air conditioner of the present application;

[0052] Figure 18 is a size schematic view of a heat exchanger in one embodiment of the indoor hanging air conditioner of the present application.

[0053] Figure 19 wherein, 100, a casing; 200, an air deflector; 300, a heat exchanger;

[0054] ​​​​​​​​​​

[0055] 101, casing air inlet; 102, casing air outlet; 110, front casing; 120, rear casing;

[0056] 301, first fold heat exchanger; 302, second fold heat exchanger; 303, third fold heat exchanger;

[0057] 304, first sub-zone; 305, second sub-zone; 306, third sub-zone; 307, fourth sub-zone; 308, ventilation part

[0058] 310, first fin; 320, second fin; 330, heat exchange tube;

[0059] 311, third plane; 312, tube hole; 321, first plane; 322, second plane; 323, protruding part; 324, flow guiding part; 325, upper part; 326, lower part. DETAILED DESCRIPTION

[0060] For the purpose of making the purpose and implementation of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to clearly and completely describe the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0061] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0062] The terms "first", "second", "third", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit the specific order or sequence, unless otherwise specified. It should be understood that the terms used in this way can be interchanged under appropriate circumstances.

[0063] The terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not necessarily limit to all the components clearly listed, but can include other components not clearly listed or inherent to these products or devices.

[0064] The hanging type air conditioner indoor unit provided by the embodiments of the present application can have various implementation forms, for example, can be a hanging type air conditioner indoor unit with fresh air function, or a hanging type air conditioner indoor unit without fresh air function, etc. Figure 1 And Figure 2 A specific embodiment of the hanging type air conditioner indoor unit of the present application.

[0065] As Figure 1As shown, the casing 100 is used to form the overall appearance of the air conditioner indoor unit, and the casing 100 has a top and a bottom, the top of the casing 100 and the bottom of the casing 100 are opposite two ends, and the height direction of the casing 100 is from the top of the casing 100 to the bottom of the casing 100; the left side of the casing 100 and the right side of the casing 100 are opposite two sides, and the length direction of the casing 100 is from the left side of the casing 100 to the right side of the casing 100; the front side of the casing 100 and the back side of the casing 100 are opposite two sides, and the thickness direction of the casing 100 is from the front side of the casing 100 to the back side of the casing 100.

[0066] In actual application, the casing 100 is usually arranged at the top of the room or the upper space of the room, wherein the back side of the casing 100 is arranged towards the wall, and the front side of the casing 100 is arranged towards the user.

[0067] The casing 100 is internally defined to form a heat exchange cavity, and the heat exchange cavity extends along the length direction of the casing 100; the casing 100 is formed with a casing air inlet 101, and the casing air inlet 101 is arranged at the top of the casing 100, the casing air inlet 101 is communicated with the heat exchange cavity, and indoor air enters the heat exchange cavity through the casing air inlet 101.

[0068] The casing air inlet 101 extends along the length direction of the casing 100, so that the casing air inlet 101 has a larger size, thereby enabling the air conditioner indoor unit to have a larger air inlet amount.

[0069] As shown, Figure 2 the casing 100 is formed with a casing air outlet 102, and the casing air outlet 102 is arranged at the front side of the casing 100 and close to the bottom of the casing 100, i.e. the casing air outlet 102 is located at the front lower side of the casing 100, the casing air outlet 102 is communicated with the heat exchange cavity, and the air in the heat exchange cavity is output to the room through the casing air outlet 102.

[0070] The casing air outlet 102 extends along the length direction of the casing 100, so that the casing air outlet 102 has a larger size, thereby enabling the air conditioner indoor unit to have a larger air outlet amount.

[0071] As shown, Figure 2 a deflector 200 is arranged at the casing air outlet 102, and the deflector 200 is rotatably connected to the casing air outlet 102 to open or close the casing air outlet 102. The deflector 200 can also guide the air output to the room through the casing air outlet 102, or adjust the air outlet angle and direction of the casing air outlet 102, etc. The rotation axis of the deflector 200 is arranged along the length direction of the casing 100.

[0072] As shown, Figure 3 the casing 100 comprises a front shell 110, and the front shell 110 is located at the front side of the casing 100.

[0073] The casing 100 comprises a rear shell 120, which is arranged opposite to the front shell 110 along the thickness direction of the casing 100, and the rear shell 120 and the front shell 110 jointly define a heat exchange cavity.

[0074] The indoor hanging air conditioner comprises a heat exchange fan, which is arranged in the heat exchange cavity and used to introduce indoor air into the heat exchange cavity and / or output air in the heat exchange cavity to the indoor. The axial direction of the heat exchange fan is arranged along the length direction of the casing 100.

[0075] It should be noted that in the indoor hanging air conditioner, the heat exchange fan is usually a cross-flow fan.

[0076] As shown in Figures 2-6 The indoor hanging air conditioner comprises a heat exchanger 300, which is arranged in the heat exchange cavity and used to exchange heat with air passing through the heat exchanger 300 to form air conditioner air to meet the cooling or heating needs of the user. The heat exchanger 300 is arranged close to the casing air inlet 101, and at least part of the windward side of the heat exchanger 300 is arranged towards the casing air inlet 101, so that the air entering the heat exchange cavity can be in contact with the heat exchanger 300 as soon as possible.

[0077] It should be noted that the air conditioner air can be cold air, hot air, or even normal temperature air.

[0078] The heat exchange fan is located on the leeward side of the heat exchanger 300, and part of the heat exchanger 300 is located above the heat exchange fan; by operating the heat exchange fan, indoor air is introduced into the heat exchange cavity from the casing air inlet 101, and after being exchanged by the heat exchanger 300 to form air conditioner air, the air conditioner air is output to the indoor from the casing air outlet 102.

[0079] As shown in Figure 3 The heat exchanger 300 comprises a first folded heat exchanger 301, which is arranged close to the rear side of the casing 100, and the lower end of the first folded heat exchanger 301 is mounted on the side of the rear shell 120 towards the heat exchange cavity; the first folded heat exchanger 301 is arranged upwardly and obliquely towards the front side of the casing 100, and the upper end of the first folded heat exchanger 301 is arranged towards the casing air inlet 101.

[0080] As shown in Figure 3 The heat exchanger 300 comprises a second folded heat exchanger 302, the upper end of the second folded heat exchanger 302 is arranged towards the casing air inlet 101 and in contact with the upper end of the first folded heat exchanger 301, and the second folded heat exchanger 302 is arranged downwardly and obliquely towards the front side of the casing 100.

[0081] As shown in Figure 3As shown, the heat exchanger 300 includes a third fold heat exchanger 303. The upper end of the third fold heat exchanger 303 is connected to the lower end of the second fold heat exchanger 302. The lower end of the third fold heat exchanger 303 is positioned towards the bottom of the housing 100 and is inclined downwards towards the front of the housing 100. The lower end of the third fold heat exchanger 303 is installed on the side of the front shell 110 facing the heat exchange chamber.

[0082] The first fold heat exchanger 301, the second fold heat exchanger 302 and the third fold heat exchanger 303 are tilted to facilitate the flow of condensate on the surface of the heat exchanger 300.

[0083] However, since there is a space at the connection between the second heat exchanger 302 and the third heat exchanger 303, the condensate produced by the second heat exchanger 302 tends to accumulate in the space, which reduces the overall heat exchange effect of the heat exchanger 300.

[0084] Based on this, in this application, the fins of the second fold heat exchanger 302 and the fins of the third fold heat exchanger 303 are integrally formed to avoid the formation of a receiving space at the connection between the second fold heat exchanger 302 and the third fold heat exchanger 303, thereby preventing condensate from accumulating at the connection between the second fold heat exchanger 302 and the third fold heat exchanger 303.

[0085] In this application, the heat exchanger 300 includes a first fin 310, which is disposed near the rear side of the housing 100; the first fin 310 is inclined upward toward the front side of the housing 100, the upper end of the first fin 310 is disposed toward the air inlet 101 of the housing, and the first fin 310 is installed on the side of the rear housing 120 facing the heat exchange chamber.

[0086] Multiple first fins 310 are provided, and the multiple first fins 310 are arranged along the length direction of the heat exchanger 300 to jointly form the first folded heat exchanger 301. It should be noted that the length direction of the heat exchanger 300 is the same as the length direction of the casing 100.

[0087] like Figure 4 As shown, the heat exchanger 300 includes a second fin 320, which is disposed near the front side of the housing 100. The upper end of the second fin 320 is disposed toward the air inlet 101 of the housing and is in contact with the upper end of the first fin 310. The middle part of the second fin 320 is bent and protruded toward the front side of the housing 100. The lower end of the second fin 320 is disposed toward the bottom of the housing 100. The lower end of the second fin 320 is installed on the side of the front shell 110 facing the heat exchange chamber.

[0088] Multiple second fins 320 are provided, and the multiple second fins 320 are arranged along the length of the heat exchanger 300.

[0089] The second fin 320 comprises a fin body, and a leeward side of the fin body is arranged towards the heat exchange fan.

[0090] As shown in Figure 4 The second fin 320 comprises a protruding part 323 arranged on the fin body, and the protruding parts 323 are arranged in groups on the fin body; each group of the protruding parts 323 comprises a plurality of the protruding parts 323.

[0091] The upper end surface of the protruding part 323 and the fin body have a gap therebetween to jointly define a ventilation part 308 for air to pass through. It should be noted that the number of the ventilation parts 308 is in one-to-one correspondence with the number of the protruding parts 323.

[0092] Generally, the more the number of the ventilation parts 308, the higher the heat exchange coefficient and the greater the air resistance, and the less the number of the ventilation parts 308, the lower the heat exchange coefficient and the smaller the air resistance.

[0093] Based on this, in the present application, the first fin 310 and the second fin 320 are zoned according to the flow rate of the airflow flowing through the first fin 310 and the second fin 320, and the number of each group of the protruding parts 323 in different regions is designed to increase the heat exchange effect of the first fin 310 and the second fin 320, thereby increasing the overall heat exchange effect of the heat exchanger 300.

[0094] As shown in Figure 5 The heat exchanger 300 comprises a first zone 304 located at the upper end of the leeward side of the second fin 320 and the lower end of the windward side of the second fin 320.

[0095] The heat exchanger 300 comprises a second zone 305 located at the lower end of the leeward side of the second fin 320 and the upper end of the windward side of the second fin 320, and the second zone 305 is also located at the first fin 310; the flow rate of the airflow flowing through the first zone 304 is greater than the flow rate of the airflow flowing through the second zone 305; the number of each group of the protruding parts 323 on the first zone 304 is greater than that on the second zone 305, the number of each group of the protruding parts 323 on the first zone 304 is 4-6, and the number of each group of the protruding parts 323 on the second zone 305 is 3-4.

[0096] The heat exchanger 300 comprises a third zone 306 located at the lower end of the leeward side of the second fin 320 and the lower end of the leeward side of the first fin 310; the flow rate of the airflow flowing through the third zone 306 is less than the flow rate of the airflow flowing through the second zone 305, the number of each group of the protruding parts 323 on the third zone 306 is less than that on the second zone 305, and the number of each group of the protruding parts 323 on the third zone 306 is 0-2.

[0097] In this application, by providing a larger number of protrusions 323 in each group of protrusions 323 on the first zone 304 with a higher flow velocity, and a relatively smaller number of protrusions 323 in each group of protrusions 323 on the second zone 305 with a relatively lower flow velocity, and a relatively smaller number of protrusions 323 in each group of protrusions 323 on the third zone 306 with a relatively lower flow velocity, efficient heat exchange can be achieved in regions with different airflow conditions, thereby increasing the heat exchange capacity of the second fin 320.

[0098] In some embodiments, the wind speed in the first zone 304 is above 1.8 m / s, and the wind speed is not very sensitive to changes in the wind resistance of the second fin 320. Designing a large number of protrusions 323 in each group on the first zone 304, although this results in a higher wind resistance in the first zone 304, minimizes the wind speed reduction. The large number of protrusions 323 in each group on the first zone 304 achieves good overall heat exchange performance under high wind speeds.

[0099] In some embodiments, the wind speed in the second zone 305 is between 1.3 and 1.8 m / s, and the wind speed is moderately sensitive to the change in wind resistance of the second fin 320. A moderate number of protrusions 323 are provided in each group of protrusions 323 on the second zone 305, which can achieve the best comprehensive heat exchange effect and maximize the heat exchange capacity under medium wind speed.

[0100] In some embodiments, the wind speed in the third zone 306 is below 1.3 m / s, and the wind speed is highly sensitive to changes in fin resistance. Designing a smaller number of protrusions 323 in each group on the third zone 306 results in a lower heat transfer coefficient under the same wind speed conditions, but lower wind resistance, allowing for a significant increase in wind speed and thus a higher heat transfer coefficient. Furthermore, since the third zone 306 is located at the bottom of the heat exchanger 300, it tends to accumulate more condensate during cooling operations. Therefore, designing fewer or no protrusions 323 in each group on the third zone 306 achieves better drainage.

[0101] like Figure 5 As shown, the heat exchanger 300 includes a fourth section 307, which is located at the protrusion on the windward side of the second fin 320. Due to the influence of the outline of the second fin 320, the wind speed in the upper part of the fourth section 307 is relatively low, while the wind speed in the lower part of the fourth section 307 is relatively high.

[0102] Based on this, in this application, the number of each group of protrusions 323 in the upper half of the fourth partition 307 is less than the number of each group of protrusions 323 in the lower half. The number of each group of protrusions 323 in the upper half of the fourth partition 307 is 1, and the number of each group of protrusions 323 in the lower half of the fourth partition 307 is the same as that in the second partition 305, so as to achieve uniform wind speed distribution and uniform heat exchange in each part, and achieve the best comprehensive heat exchange effect.

[0103] Specifically, the fourth partition 307 includes a first block; the fourth partition 307 includes a second block, which is located below the first block. The number of protrusions 323 in each group on the first block is less than the number of protrusions 323 in each group on the second partition 305; the number of protrusions 323 in each group on the second block is the same as the number of protrusions 323 in each group on the second partition 305.

[0104] It should be noted that most of the area of ​​the first fin 310 belongs to the second section 305.

[0105] Generally, the more complex the fin structure, the higher the heat transfer coefficient and the greater the wind resistance, while the simpler the fin structure, the lower the heat transfer coefficient and the smaller the wind resistance.

[0106] Based on this, the present application has designed the structure of different regions on the first fin 310 and the second fin 320 to increase the heat exchange effect of the first fin 310 and the second fin 320.

[0107] It should be noted that, since the first fin 310 includes the second partition 305 and the third partition 306, and the second fin 320 includes the first partition 304, the second partition 305 and the third partition 306, for the same heat exchanger 300, the second partition 305 and the third partition 306 have the same structure on the first fin 310 and the second fin 320.

[0108] The following section will take the structure of different partitions on the second fin 320 as an example for detailed explanation, and will not repeat the structure of different partitions.

[0109] In some embodiments of this application, the first partition 304 and the second partition 305 are respectively provided with protrusions 323 on both sides of the fin body to make the heat exchange on both sides of the fin body more uniform and increase the heat exchange effect of the second fin 320. It should be noted that, in this embodiment, the two sides of the fin body are the two sides of the second fin 320 along its arrangement direction.

[0110] In some embodiments, such as Figure 8 As shown, each group of protrusions 323 on the first partition 304 includes six protrusions 323, which are arranged along the width direction of the first partition 304; four of the protrusions 323 are located on the same side of the second fin 320, and the other two protrusions 323 are located on the other side of the second fin 320, so as to achieve a high heat transfer coefficient and high heat transfer in the high-speed region.

[0111] like Figure 9As shown, each group of protrusions 323 on the second partition 305 includes four protrusions 323. The four protrusions 323 are arranged along the width direction of the second partition 305. Two of the protrusions 323 are located on the same side of the second fin 320, and the other two protrusions 323 are located on the other side of the second fin 320, so as to take into account both heat exchange and resistance performance in the medium speed range and achieve the best comprehensive heat exchange effect.

[0112] In some other embodiments of this application, the first partition 304 and the second partition 305 are provided with protrusions 323 on one side of the second fin 320 arrangement direction.

[0113] In some embodiments, such as Figure 14 As shown, each group of protrusions 323 on the first partition 304 includes four protrusions 323, which are arranged along the width direction of the first partition 304.

[0114] like Figure 15 As shown, each group of protrusions 323 on the second partition 305 includes three protrusions 323, which are arranged along the width direction of the second partition 305.

[0115] For ease of description, in this embodiment, a fin with protrusions 323 on both sides is called a double bridge, and a fin with protrusions 323 on only one side is called a single bridge.

[0116] The third section 306 has a protrusion 323 on one side of the second fin 320's arrangement direction to reasonably control the heat exchange efficiency of the third section 306, avoid excessive heat exchange of air in the third section 306, which would cause the local temperature of the third section 306 to be too high or too low, thereby making the heat exchange of the second fin 320 as a whole uniform and avoiding the phenomenon of local temperature being too high or too low.

[0117] In some embodiments, such as Figure 11 As shown, each set of protrusions 323 on the third partition 306 includes two protrusions 323, which are arranged along the width direction of the third partition 306. The two protrusions 323 are located on the same side of the second fin 320, so as to increase the wind speed and optimize the drainage effect in the low speed and enhanced drainage zone.

[0118] In other embodiments, such as Figure 17 As shown, the third partition 306 does not have a protrusion 323, but a guide 324 is provided in the third partition 306. The guide 324 is provided on one side of the second fin 320. The guide 324 forms a corrugated shape on the surface of the second fin 320 to accelerate the discharge of condensate and avoid excessive condensate residue on the fin surface, which would affect the heat exchange effect.

[0119] In practical applications, the first partition 304 can adopt a form of double bridges and 6 protruding portions 323, or a form of single bridge and 4 protruding portions 323; the second partition 305 can adopt a form of double bridges and 4 protruding portions 323, or a form of single bridge and 3 protruding portions 323; and the third partition 306 can adopt a form of single bridge and 2 protruding portions 323, or a form of setting a flow guide portion 324 on one side of the fin without setting a protruding portion 323.

[0120] As shown in FIG. 3, the fin body includes an upper portion 325 and a lower portion 326, the leeward side of the upper portion 325 is defined to form a first plane 321 extending along the length direction of the heat exchanger 300; the leeward side of the lower portion 326 is defined to form a second plane 322 extending along the length direction of the heat exchanger 300; the second plane 322 and the first plane 321 are defined to form an included angle a, and the included angle a satisfies: a≥135°, a≤145°, so that the heat exchanger 300 has a larger heat exchange area under the same space of the shell 100, thereby increasing the heat exchange effect of the heat exchanger 300. Figure 18

[0121] If a>145°, the heat exchange area of the second fin 320 is smaller under the same space of the shell 100, resulting in a decrease in the heat exchange effect of the second fin 320; under the same heat exchange area of the second fin 320, the second fin 320 occupies a larger space; if a<135°, the overall strength of the second fin 320 will be reduced.

[0122] As shown in FIG. 3, the leeward side of the first fin 310 is defined to form a third plane 311 extending along the length direction of the heat exchanger 300; the third plane 311 and the first plane 321 are defined to form an included angle β, and the included angle β satisfies: β≥70°, β≤80°, so that the heat exchanger 300 has a better heat exchange effect without occupying a larger space. Figure 18

[0123] If β>80°, the first fin 310 and the second fin 320 occupy a larger space in the thickness direction of the shell 100, which increases the size of the shell 100.

[0124] If β<70°, the projection area of the first fin 310 and the second fin 320 in the thickness direction of the shell 100 is reduced, which reduces the contact area of air with the first fin 310 and the second fin 320 in the thickness direction of the shell 100, i.e., the area of the first fin 310 and the second fin 320 relatively arranged with the air inlet 101 of the shell 100 in the thickness direction of the shell 100 is reduced, which reduces the heat exchange effect of the heat exchanger 300.

[0125] ​​In this embodiment, the included angle β satisfies: β≥70°, β≤80°, so that the heat exchanger 300 can be installed on the casing 100 with a thickness of 180mm~210mm and a height of 280mm~310mm.

[0126] like Figure 19 As shown, the distance from the windward side to the leeward side of the fin body is the width of the second fin 320; the width of the upper part 325 is W1, which satisfies: W1≥11mm, W1≤15mm, so as to take advantage of the high wind speed of the upper part of the second fin 320 and achieve the simultaneous improvement of heat transfer coefficient and heat transfer area.

[0127] If W1 < 11 mm, the heat exchange area of ​​the second fin 320 may be too small; if W1 > 15 mm, the wind resistance of the second fin 320 may be too large, the wind speed may be too low, and the heat transfer coefficient may be reduced.

[0128] The distance from the windward side to the leeward side of the first fin 310 is the width of the first fin 310. The width of the first fin 310 is W2, which satisfies the following conditions: W2≥11mm, W2≤15mm. This is to take advantage of the high wind speed of the first fin 310 and achieve a simultaneous increase in heat transfer coefficient and heat transfer area.

[0129] If W2 < 11 mm, the heat exchange area of ​​the first fin 310 may be too small; if W2 > 15 mm, the wind resistance of the first fin 310 may be too large, the wind speed may be too low, and the heat transfer coefficient may be reduced.

[0130] In some embodiments, the first fin 310 and the second fin 320 are formed by cutting the same metal sheet. The lower end of the first fin 310 and the upper end of the second fin 320 are connected to each other. In order to facilitate the manufacturing of the first fin 310 and the second fin 320, the width of the first fin 310 is the same as the width of the upper end of the second fin 320, that is, W2 = W1.

[0131] The width of the lower part 326 is W3, and the width of the upper part 325 is greater than the width of the lower part 326, i.e. W1>W3, so that the fin body has high strength and at the same time the fin body has sufficient heat exchange area.

[0132] In some embodiments, the width W3 of the lower portion 326 and the width W1 of the upper portion 325 satisfy: W3≥0.7W1, W3≤0.9W1, so that the fin body has high strength and sufficient heat exchange area.

[0133] If W3<0.70W1, it is easy to cause the fin body heat exchange area to be too small and the fin body strength to be too low; if W3>0.90W1, the wind resistance reduction effect is not enough, and a good wind speed distribution cannot be formed; W3 and W1 are made to satisfy: W3≥0.7W1, W3≤0.9W1, the wind resistance of the lower part of the fin body can be appropriately reduced, the wind speed in this area is improved, and sufficient heat exchange area and structural strength are ensured.

[0134] As shown in Figure 18 , the heat exchanger 300 includes a heat exchange pipe 330, a refrigerant flows in the heat exchange pipe 330, and the heat exchange pipe 330 is arranged between the first fin 310 and / or the second fin 320 to increase the heat exchange area through the first fin 310 and / or the second fin 320, strengthen the heat transfer effect, and make the heat more efficiently transferred between the fluids inside and outside the pipe.

[0135] As shown in Figure 18 , the first fin 310 and the second fin 320 are provided with pipe holes 312 for the heat exchange pipe 330 to pass through, and the arrangement position of the pipe hole 312 determines the arrangement mode and arrangement position of the heat exchange pipe 330.

[0136] As shown in Figure 19 , the first fin 310 and the second fin 320 are respectively provided with multiple rows of pipe holes 312, and the multiple rows of pipe holes 312 are arranged along the width direction of the first fin 310 or the second fin 320. The multiple pipe holes 312 in the same row of pipe holes 312 are arranged along the length direction of the first fin 310 or the second fin 320. In the same row of pipe holes 312, the distance between adjacent pipe holes 312 is L1, and L1 satisfies: L1≥14mm, L1≤21mm; if L1<14mm, the distance between the pipe holes 312 is too small, which causes the overall wind resistance of the evaporator to be too large and the cost to be high; if L1>21mm, the fin heat exchange coefficient is too low, and the heat exchange amount is attenuated too much.

[0137] It should be noted that the number of pipe holes 312 should be even, and in the embodiment, the distance between the pipe holes 312 in the row of pipe holes 312 on the second fin 320 close to the windward side of the second fin 320 and located at the curved part of the second fin 320 is L2, so that L2 is different from L1, to ensure the convenience of production of the second fin 320 and meet the distribution requirements of the pipe holes 312. The different rows of pipe holes 312 are distributed in the length direction of the first fin 310 or the second fin 320, to facilitate the heat exchange pipe 330 to be inserted and wound between the pipe holes 312.

[0138] It should be further noted that a group of protruding parts 323 is arranged between the adjacent two pipe holes 312 in the same row.

[0139] For the convenience of description, the distance between adjacent tube holes 312 in the same row of tube holes 312 is referred to as the hole distance of the same row of tube holes 312, and the distance between adjacent tube holes 312 in different rows of tube holes 312 is referred to as the hole distance of different rows of tube holes 312.

[0140] It should be noted that the adjacent tube holes 312 in different rows of tube holes 312, that is, two tube holes 312 are located in different rows, and the distance between the two tube holes 312 is the closest.

[0141] The hole distance of different rows of tube holes 312 is L3, and the hole distance of different rows of tube holes 312 is 1 / 2 of the hole distance of the same row of tube holes 312, that is, L1 = 2L3.

[0142] In some embodiments, the first fin 310 and the second fin 320 are respectively provided with two rows of tube holes 312, and the two rows of tube holes 312 are arranged along the width direction of the first fin 310 or the second fin 320. One of the two rows of tube holes 312 is arranged close to the windward side of the first fin 310 or the second fin 320, and the other row of tube holes 312 is arranged close to the leeward side of the first fin 310 or the second fin 320.

[0143] In this embodiment, taking the first fin 310 as an example, the setting positions of the two rows of tube holes 312 on the first fin 310 are described in detail.

[0144] As shown in Figure 19 , the distance between the two adjacent rows of tube holes 312 along the width of the first fin 310 is W4, the distance from the tube hole 312 close to the windward side of the first fin 310 to the windward side of the first fin 310 is W5, and the distance from the tube hole 312 close to the leeward side of the first fin 310 to the leeward side of the first fin 310 is W6. W4, W5 and W6 satisfy the relationship: W4 = 2W5, W4 = 2W6, W5 = W6, W4 + W5 + W6 = W1, so as to improve the production convenience of the evaporator and realize the consistency of the strength performance of each part of the fin, and the tube holes 312 are uniformly distributed along the width direction of the first fin 310.

[0145] It should be noted that the setting positions of the two rows of tube holes 312 on the second fin 320 correspond to the setting positions on the first fin 310, which will not be described here.

[0146] The above hanging type air conditioner indoor unit replaces the fins of the second heat exchanger 302 and the fins of the third heat exchanger 303 in the prior art by arranging the second fin 320, so as to avoid the condensate water from gathering at the connection between the second heat exchanger 302 and the third heat exchanger 303; and different numbers of protruding portions 323 are arranged in different areas of the second fin 320 according to the flow rate of the airflow, so that the heat exchanger 300 has good heat exchange effect and the heat exchange of the heat exchanger 300 is uniform.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0148] The foregoing description has been set forth in conjunction with a particular embodiment and implementations, for purposes of convenience and illustration. However, the foregoing discussion is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Various modifications and changes are possible in light of the teachings above. The selection and arrangement of various elements described or claimed in the foregoing embodiments are presented to provide the best description possible of the principles and the practical applications of the embodiments. It is intended that the described embodiments be considered as exemplary only, with the scope of the embodiments being indicated by the appended claims rather than by the foregoing description.

Claims

1. A wall-mounted air conditioner indoor unit, characterized by comprising: The application relates to a heat exchange device. The heat exchange device comprises: a cabinet, a top of the cabinet is provided with a cabinet air inlet, a front lower side of the cabinet is provided with a cabinet air outlet; a heat exchange fan, which is arranged in the cabinet; a heat exchanger, which is arranged in the cabinet, a back wind side of the heat exchanger is arranged towards the heat exchange fan, and at least part of a front wind side of the heat exchanger is arranged towards the cabinet air inlet; the heat exchanger comprises: a first fin, which is arranged close to a rear side of the cabinet; the first fin is arranged to be inclined upwards towards a front side of the cabinet, and an upper end of the first fin is arranged towards the cabinet air inlet; a second fin, which is arranged close to the front side of the cabinet; an upper end of the second fin is arranged to be in contact with the upper end of the first fin and is arranged towards the cabinet air inlet, a middle part of the second fin is arranged to be bent towards the front side of the cabinet, and a lower end of the second fin is arranged towards a bottom of the cabinet; the second fin comprises: a fin body, which comprises: a first subarea, which is located at an upper end of a back wind side of the fin body and a lower end of a front wind side of the fin body; a second subarea, which is located at a lower end of the back wind side of the fin body and an upper end of the front wind side of the fin body; a protruding part, which is arranged on the fin body; the protruding part is arranged in groups on the first subarea and the second subarea; 2.The wall-mounted air conditioner according to claim 1, characterized in that, wherein the number of the protruding part in each group on the first subarea is more than the number of the protruding part in each group on the second subarea. 3.The wall-mounted air conditioner indoor unit according to claim 2, characterized by, The first subarea and the second subarea are respectively provided with the protruding part on both sides of the fin body. 4.The wall-mounted air conditioner according to claim 1, wherein The number of the protruding part in each group on the first subarea is 4-6, and the number of the protruding part in each group on the second subarea is 3-4. 5.The wall-mounted air conditioner according to claim 1, wherein The second fin is arranged in multiple, and the multiple second fins are arranged along a length direction of the heat exchanger. 6.The wall-mounted air conditioner according to claim 3, wherein An end surface of the protruding part and the fin body have a gap, so as to jointly define a ventilation part for air passing through. 7.The wall-mounted air conditioner according to claim 3, wherein The fin body further comprises a third subarea, which is located at a lower end of the back wind side of the fin body and a lower end of the back wind side of the first fin; the number of the protruding part in each group on the third subarea is 0-2, which is less than the number of the protruding part in each group on the second subarea. 8.The wall-mounted air conditioner according to claim 1, wherein The fin body comprises a fourth subarea, which is located at a bending part of the front wind side of the fin body; the fourth subarea comprises a first block and a second block, the first block is located above the second block, the number of the protruding part in each group on the first block is less than the number of the protruding part in each group on the second subarea, and the number of the protruding part in each group on the second block is the same as the number of the protruding part in each group on the second subarea. A distance from the front wind side to the back wind side of the fin body is a width of the fin body; the fin body comprises an upper part and a lower part, and the width of the upper part is greater than the width of the lower part. 9.The wall-mounted air conditioner according to claim 8, characterized by, The width of the upper portion is W1, W1 satisfies: W1≥11mm, W1≤15mm; the width of the lower portion is W3, and W3 and W1 satisfy: W3≥0.7W1, W3≤0.9W1. 10.The wall-mounted air conditioner according to claim 8, wherein The connection part of the upper portion and the lower portion is free of a notch, the leeward side of the upper portion is defined to form a first plane, the leeward side of the lower portion is defined to form a second plane, the second plane and the first plane are defined to form an included angle α, and the included angle α satisfies: α≥135°, α≤145°.

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