Air conditioner indoor unit and air conditioner

Abstract

The invention relates to an air conditioner indoor unit and an air conditioner. The air conditioner indoor unit comprises a shell, a fan and a heat exchanger, wherein the fan and the heat exchanger are sequentially arranged in the shell in the first direction; the heat exchanger comprises a first heat exchange part and a second heat exchange part, the first end of the first heat exchange part extends towards the top of the shell, the first end of the second heat exchange part extends towards the bottom of the shell, the second end of the first heat exchange part is adjacent to the second end of the second heat exchange part, and a first included angle is formed between the first heat exchange part and the second heat exchange part. The fan comprises an air outlet, an upper guide plate of the air outlet extends towards the first end of the first heat exchange piece, and a lower guide plate of the air outlet extends towards the first end of the second heat exchange piece. After the draught fan sucks airflow to the shell, the airflow is guided through the upper guide plate and the lower guide plate, the airflow is sent to the first heat exchange piece and the second heat exchange piece, the airflow can completely cover the whole heat exchanger, and therefore the heat exchange uniformity of the heat exchanger can be improved, and the heat exchange efficiency of the air conditioner indoor unit can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to an air-conditioning indoor unit and an air conditioner. Background Art

[0002] In some related technologies, the indoor unit of the air conditioner has the problem of low heat exchange efficiency. Summary of the Invention

[0003] Some embodiments of the present disclosure provide an air-conditioning indoor unit and an air conditioner, for alleviating the problem of low heat exchange efficiency of the air-conditioning indoor unit.

[0004] In one aspect of the present disclosure, an air conditioner indoor unit is provided, comprising a housing, and a fan and a heat exchanger sequentially arranged in the housing along a first direction;

[0005] The heat exchanger includes a first heat exchange element and a second heat exchange element, wherein a first end portion of the first heat exchange element extends toward the top of the shell, a first end portion of the second heat exchange element extends toward the bottom of the shell, a second end portion of the first heat exchange element is adjacent to a second end portion of the second heat exchange element, and a first angle is formed between the first heat exchange element and the second heat exchange element;

[0006] The fan includes an air outlet, an upper guide plate of the air outlet extends toward the first end portion of the first heat exchange element, and a lower guide plate of the air outlet extends toward the first end portion of the second heat exchange element.

[0007] In some embodiments, a partition is provided in the shell, and the partition divides the shell into a first chamber for accommodating the fan and a second chamber for accommodating the heat exchanger. A connecting portion is provided on the upper portion of the partition, and the air outlet is provided in the connecting portion. The downstream end of the upper guide plate passes through the connecting portion and is located in the second chamber, and the downstream end of the lower guide plate is connected to the top of the partition.

[0008] In some embodiments, a second angle is formed between the upper guide plate and the lower guide plate, and the angle range of the second angle is 25° to 40°, preferably 30° to 35°.

[0009] In some embodiments, in the first direction, the downstream end of the upper guide plate is closer to the heat exchanger than the downstream end of the lower guide plate.

[0010] In some embodiments, in the first direction, there is a first distance between the downstream end of the upper guide plate and the downstream end of the lower guide plate, and the size range of the first distance is 40mm to 60mm, preferably 45mm to 55mm.

[0011] In some embodiments, in the first direction, the first end portion of the second heat exchange member is located between the downstream end of the upper guide plate and the downstream end of the lower guide plate.

[0012] In some embodiments, in the first direction, there is a second distance between the first end of the second heat exchange element and the downstream end of the lower guide plate, and the second distance ranges from 30 mm to 50 mm, preferably from 32 mm to 45 mm.

[0013] In some embodiments, in the first direction, there is a first distance between the downstream end of the upper guide plate and the downstream end of the lower guide plate, and a second distance between the first end of the second heat exchange element and the downstream end of the lower guide plate, and the ratio of the second distance to the first distance is in the range of 0.6 to 0.9, preferably 0.7 to 0.8.

[0014] In some embodiments, in the second direction, there is a third distance between the upstream end of the upper guide plate and the upstream end of the lower guide plate, and the range of the third distance is 70mm to 100mm, preferably 80mm to 90mm, and the second direction is parallel to the direction from the top to the bottom of the shell, and the second direction intersects with the first direction.

[0015] In some embodiments, in the first direction, there is a fourth distance between the center of the fan and the first end of the second heat exchange element, and the size range of the fourth distance is 130 mm to 170 mm, preferably 140 mm to 160 mm.

[0016] In some embodiments, in the first direction, there is a fifth distance between the center of the fan and the downstream end of the lower guide plate, and the size range of the fifth distance is 95mm to 125mm, preferably 100mm to 115mm.

[0017] In some embodiments, in the first direction, there is a fourth distance between the center of the fan and the first end of the second heat exchange element, and a fifth distance between the center of the fan and the downstream end of the lower guide plate, and the ratio of the fourth distance to the fifth distance ranges from 1.1 to 1.7, preferably from 1.3 to 1.5.

[0018] In some embodiments, the impeller radius of the fan ranges from 60 mm to 80 mm, preferably from 65 mm to 75 mm.

[0019] In some embodiments, in the first direction, there is a fourth distance between the center of the fan and the first end of the second heat exchange element, and the ratio of the fourth distance to the impeller radius of the fan is in the range of 1.8 to 2.5, preferably 2 to 2.3.

[0020] In some embodiments, in the first direction, there is a fifth distance between the center of the fan and the downstream end of the lower guide plate, and the ratio of the fifth distance to the impeller radius of the fan is in the range of 1.2 to 1.8, preferably 1.4 to 1.7.

[0021] In some embodiments, the first heat exchange element forms a third angle with the first line, the second heat exchange element forms a fourth angle with the first line, the third angle is greater than the fourth angle, and the first line is parallel to the first direction.

[0022] In some embodiments, the first heat exchange element forms a third angle with the first line, and the angle range of the third angle is 40° to 55°, preferably 43° to 50°; the first line is parallel to the first direction.

[0023] In some embodiments, the second heat exchange element forms a fourth angle with the first line, and the angle range of the fourth angle is 25° to 45°, preferably 32° to 38°; the first line is parallel to the first direction.

[0024] In some embodiments, the first angle ranges from 70° to 90°, preferably from 80° to 85°.

[0025] In some embodiments, a partition is provided in the shell, which divides the shell into a first chamber for accommodating the fan and a second chamber for accommodating the heat exchanger. The sum of the dimensions of the first chamber and the second chamber extending along the first direction is the first width, and the dimension of the second chamber extending along the first direction is the second width. The second width accounts for 40% to 45% of the first width.

[0026] In some embodiments, the first width ranges from 380 mm to 410 mm, and the second width ranges from 155 mm to 185 mm.

[0027] In some embodiments, a first air outlet is provided on the side wall of the shell located in the first direction, and a second air outlet is provided at the bottom of the shell. The first opening size of the first air outlet extending along the second direction is in the range of 100mm to 130mm, preferably 105mm to 120mm, and the second opening size of the second air outlet extending along the first direction is in the range of 45mm to 75mm, preferably 50mm to 65mm; wherein the second direction is parallel to the direction from the top to the bottom of the shell, and the second direction intersects with the first direction.

[0028] In some embodiments, a partition is provided in the shell, and the partition divides the shell into a first chamber for accommodating the fan and a second chamber for accommodating the heat exchanger; the second chamber is provided with a first air outlet on the side wall located in the first direction, and a second air outlet is provided at the bottom of the second chamber; the dimension of the first chamber extending along the first direction is the third width, the dimension of the second chamber extending along the first direction is the second width, and the second width is equal to the third width.

[0029] In one aspect of the present disclosure, an air conditioner is provided, comprising the above-mentioned air conditioner indoor unit.

[0030] Based on the above technical solution, the present disclosure has at least the following beneficial effects:

[0031] In some embodiments, the opening of the angle formed by the first heat exchanger and the second heat exchanger is directed toward the fan; the upper guide plate and the lower guide plate provided at the air outlet of the fan extend toward the first end of the first heat exchanger and the first end of the second heat exchanger, respectively, so that after the fan draws the airflow into the shell, the airflow is guided by the upper guide plate and the lower guide plate of the air outlet, so that the airflow is respectively sent to the first heat exchanger and the second heat exchanger, so that the airflow can completely cover the entire heat exchanger, thereby improving the uniformity of heat exchange of the heat exchanger and improving the heat exchange efficiency of the air conditioner indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0033] Figure 1 A schematic diagram of an air-conditioning indoor unit provided according to some embodiments of the present disclosure;

[0034] Figure 2 A schematic diagram of an air-conditioning indoor unit provided according to some embodiments of the present disclosure;

[0035] Figure 3 Schematic diagram of an air-conditioning indoor unit provided according to some other embodiments of the present disclosure.

[0036] The reference numerals in the accompanying drawings are described as follows:

[0037] 1-housing; 11-first cavity; 12-second cavity; 13-first air outlet; 14-second air outlet;

[0038] 2-fan; 21-upper guide plate; 211-downstream end of upper guide plate; 22-lower guide plate; 221-downstream end of lower guide plate; 23-air outlet;

[0039] 3-heat exchanger; 31-first heat exchange element; 32-second heat exchange element; 321-first end portion of the second heat exchange element;

[0040] 4- Partition.

[0041] It should be understood that the size of each part shown in the drawings is not drawn according to the actual proportional relationship.In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure, its application, or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions, and numerical values set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0043] The terms "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The terms "include" or "comprises" and similar terms mean that the elements before the term include the elements listed after the term, and do not exclude the possibility of also including other elements. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] In the present disclosure, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be not directly connected to the other device but with an intervening device.

[0045] All terms (including technical or scientific terms) used in this disclosure have the same meaning as those understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0047] refer to Figures 1 to 3 In some embodiments, the air conditioner indoor unit includes a shell 1, and a fan 2 and a heat exchanger 3 sequentially arranged in the shell 1 along a first direction X.

[0048] The heat exchanger 3 includes a first heat exchange element 31 and a second heat exchange element 32. The first end of the first heat exchange element 31 extends toward the top of the shell 1, and the first end of the second heat exchange element 32 extends toward the bottom of the shell 1. The second end of the first heat exchange element 31 is adjacent to the second end of the second heat exchange element 32, and a first angle is formed between the first heat exchange element 31 and the second heat exchange element 32.

[0049] The fan 2 includes an air outlet 23 , an upper guide plate 21 of the air outlet 23 extends toward the first end of the first heat exchange element 31 , and a lower guide plate 22 of the air outlet 23 extends toward the first end of the second heat exchange element 32 .

[0050] In the above embodiment, the heat exchanger 3 is composed of a first heat exchange element 31 and a second heat exchange element 32, which are arranged at an angle, and the first end of the first heat exchange element 31 and the first end of the second heat exchange element 32 extend toward the top and bottom of the shell 1 respectively; the opening of the angle formed by the first heat exchange element 31 and the second heat exchange element 32 faces the fan 2.

[0051] The air outlet 23 of the fan 2 is provided with an upper guide plate 21 and a lower guide plate 22, and the upper guide plate 21 and the lower guide plate 22 extend toward the first end of the first heat exchanger 31 and the first end of the second heat exchanger 32, respectively. After the fan 2 draws the airflow into the shell 1, the airflow is guided by the upper guide plate 21 and the lower guide plate 22 of the air outlet 23, so that the airflow is sent to the first heat exchanger 31 and the second heat exchanger 32, respectively, so that the airflow completely covers the entire heat exchanger 3, thereby improving the uniformity of heat exchange of the heat exchanger 3 and improving the heat exchange efficiency of the air-conditioning indoor unit.

[0052] In some embodiments, a dimension from the first end to the second end of the first heat exchange element 31 is greater than a dimension from the first end to the second end of the second heat exchange element 32 .

[0053] The first heat exchange element 31 and the second heat exchange element 32 are asymmetrically arranged to correspond to the first air port 13 and the second air port 14 described below. The airflow after heat exchange through the first heat exchange element 31 primarily flows to the first air port 13, while the airflow after heat exchange through the second heat exchange element 32 primarily flows to the second air port 14. The opening of the first air port 13 is larger than that of the second air port 14. Therefore, the dimension from the first end to the second end of the first heat exchange element 31 is larger than that of the second end of the second heat exchange element 32.

[0054] In some embodiments, the first angle formed between the first heat exchange element 31 and the second heat exchange element 32 may also be 180 degrees.

[0055] The second end of the first heat exchanger 31 is connected to the second end of the second heat exchanger 32, so that the entire heat exchanger 3 is straight. Alternatively, the second end of the first heat exchanger 31 is connected to the second end of the second heat exchanger 32, so that the entire heat exchanger 3 is V-shaped.

[0056] In some embodiments, the fan 2 comprises a centrifugal fan.

[0057] In some embodiments, the upper guide plate 21 of the air outlet 23 of the fan 2 is an upper volute tongue of a centrifugal fan, and the lower guide plate 22 of the air outlet 23 of the fan 2 is a lower volute tongue of a centrifugal fan.

[0058] In the above embodiment, the first direction X is parallel to the direction from the fan 2 to the heat exchanger 3, and the second direction Y is parallel to the direction from the top to the bottom of the housing 1. The first direction X intersects the third direction.

[0059] In some embodiments, the first direction X is the width direction of the housing 1, the second direction Y is also the height direction of the housing 1, and the third direction is the length direction of the housing 1. The first direction X is perpendicular to the second direction Y, the second direction Y is perpendicular to the third direction, and the first direction X is perpendicular to the third direction.

[0060] In some embodiments, a partition 4 is provided in the shell 1, which divides the shell 1 into a first chamber 11 accommodating the fan 2 and a second chamber 12 accommodating the heat exchanger 3. A connecting portion is provided on the upper part of the partition 4, and the air outlet 23 is provided in the connecting portion. The downstream end of the upper guide plate 21 passes through the connecting portion and is located in the second chamber 12, and the downstream end of the lower guide plate 22 is connected to the top of the partition 4.

[0061] In the above embodiment, the partition 4 divides the shell 1 into two functional chambers, the first chamber 11 is used to install the fan 2, and the second chamber 12 is used to install the heat exchanger 3. The connecting portion is arranged at the upper part of the partition 4, and the air outlet 23 is arranged at the connecting portion, so that the airflow generated by the fan 2 directly passes through the top of the partition 4 into the second chamber 12, reducing flow resistance and energy loss; the downstream end of the upper guide plate 21 extends to the inside of the second chamber 12, which can more effectively guide the airflow to the first heat exchanger 31, and the lower guide plate 22 is connected to the top of the partition 4, which is more conducive to guiding the airflow to the second heat exchanger 32, helping to achieve uniform coverage of the entire height range of the heat exchanger 3, avoiding local airflow short circuit or dead zone phenomenon, and thus improving heat exchange efficiency.

[0062] In the above embodiment, the lower guide plate 22 is fixedly connected to the top of the partition 4, and the partition 4 can provide stable support for the lower guide plate 22, which helps to enhance the overall rigidity of the fan 2 and reduce vibration and noise.

[0063] In some embodiments, the downstream end of the lower guide plate 22 is connected to the top of the partition 4, and extends a very small distance toward the bottom of the shell 1 and close to the heat exchanger 3 to achieve overlap with the partition 4, which can better guide the airflow to the second heat exchange element 32.

[0064] In some embodiments, the air conditioner indoor unit further includes a water receiving pan, which is located below the heat exchanger 3 and is used to collect condensed water generated by the heat exchanger 3 .

[0065] In some embodiments, a second angle λ is formed between the upper guide plate 21 and the lower guide plate 22 . The second angle λ ranges from 25° to 40°, preferably from 30° to 35°.

[0066] In the above embodiment, the angle range of the second angle λ formed between the upper guide plate 21 and the lower guide plate 22 is 25° to 40°, which can enable the outlet air flow to form a moderately divergent fan-shaped airflow field after passing through the connecting part of the partition 4. Through this airflow field, the airflow is more evenly guided to the first heat exchange element 31 and the second heat exchange element 32, thereby achieving uniform air supply to the two heat exchange elements, reducing local heat exchange shortages caused by concentrated or deflected airflow, and improving the heat exchange uniformity of the first heat exchange element 31 and the second heat exchange element 32.

[0067] In the above embodiment, the second angle λ formed between the upper guide plate 21 and the lower guide plate 22 is the diffusion angle of the fan 2. The optional angle range of the second angle λ is 25° to 40°, preferably 30° to 35°, for example, the second angle λ is 33°.

[0068] In the above embodiment, when the second angle λ is too small, less than 25°, the upper guide plate 21 and the lower guide plate 22 are too close to parallel, and the airflow directions tend to be consistent, which can easily cause insufficient air supply in some heat exchange areas; when the second angle λ is too large, greater than 40°, the airflow diffusion angle formed by the upper guide plate 21 and the lower guide plate 22 is too large, which may cause airflow short-circuiting, increased disturbance, and even affect the static pressure efficiency of the fan; therefore, the second angle λ formed between the upper guide plate 21 and the lower guide plate 22 is limited to the range of 25° to 40°, especially 30° to 35°, to achieve a better airflow distribution ratio, so that the first heat exchange element 31 and the second heat exchange element 32 can both obtain sufficient airflow coverage, significantly improving the overall heat exchange efficiency of the heat exchanger 3.

[0069] In some embodiments, in the first direction X, the downstream end of the upper guide plate 21 is closer to the heat exchanger 3 relative to the downstream end of the lower guide plate 22 .

[0070] In the above embodiment, the downstream end refers to the downstream along the airflow direction from the fan 2 to the heat exchanger 3 .

[0071] In the above embodiment, in the first direction X, the upper guide plate 21 extends closer to the heat exchanger 3, shortening the distance of the airflow from the air outlet 23 of the fan 2 to the corresponding area of the first heat exchange element 31, reducing the flow resistance of the airflow, and making the airflow have a higher wind speed. After the airflow enters the second cavity 12, it can reach the first heat exchange element 31 faster and can guide more airflow to the area of the first heat exchange element 31. The first heat exchange element 31 corresponds to the front air outlet (first outlet 13) on the shell 1. The airflow after heat exchange by the first heat exchange element 31 can be delivered from the front air outlet (first outlet 13), thereby improving the air supply speed and air supply volume of the front air outlet and improving the response speed.

[0072] In some embodiments, in the first direction X, there is a first distance B between the downstream end of the upper guide plate 21 and the downstream end of the lower guide plate 22 . The first distance B ranges from 40 mm to 60 mm, preferably from 45 mm to 55 mm.

[0073] In the above embodiment, if the first distance B is less than 40 mm, the upper and lower airflow paths may be too close, which may easily cause vortexes, backflows and other phenomena, and reduce the air supply stability; if the first distance B is greater than 60 mm, the centralized control ability of the airflow may be weakened; therefore, the size range of the first distance B is 40 mm to 60 mm, preferably 45 mm to 55 mm, and the upper guide plate 21 and the lower guide plate 22 can effectively maintain the directionality and continuity of the airflow, so that the airflow flows more evenly to the first heat exchange element 31 and the second heat exchange element 32, thereby improving the uniformity and guidance of the airflow organization.

[0074] In the above embodiment, in the first direction X, the size of the upper guide plate 21 is larger than the size of the lower guide plate 22 .

[0075] Since in some embodiments, the upper guide plate 21 is the upper volute tongue of the centrifugal fan, and the lower guide plate 22 is the lower volute tongue of the centrifugal fan, the length of the upper volute tongue is greater than the length of the lower volute tongue, which can better guide the airflow to the first heat exchange element 31 and the second heat exchange element 32, adjust the airflow flowing to the first heat exchange element 31 and the second heat exchange element 32, and improve the uniformity of heat exchange.

[0076] In some embodiments, the dimension of the housing 1 in the first direction X (the first width E) is 450 mm, and the first distance B is 51.5 mm.

[0077] refer to Figure 2 In some embodiments, in the first direction X, the first end portion 321 of the second heat exchange member 32 is located between the downstream end 211 of the upper guide plate 21 and the downstream end 221 of the lower guide plate 22 .

[0078] In the above embodiment, the first end 321 of the second heat exchanger 32 is located between the downstream end 211 of the upper guide plate 21 and the downstream end 221 of the lower guide plate 22, which can shorten the distance between the fan 2 and the heat exchanger 3, so that the first end 321 of the second heat exchanger 32 can contact the outlet airflow from the fan 2 earlier, reduce flow loss, improve airflow utilization, shorten the distance for the airflow to reach the second heat exchanger 32 area, reduce flow resistance, reduce the diffusion and vortex phenomenon of the airflow inside the shell 1, better guide the airflow to the second heat exchanger 32, and improve the heat exchange efficiency of the second heat exchanger 32.

[0079] refer to Figure 1 and Figure 2 In some embodiments, in the first direction X, there is a second distance A between the first end 321 of the second heat exchange member 32 and the downstream end 221 of the lower guide plate 22. The size range of the second distance A is 30 mm to 50 mm, preferably 32 mm to 45 mm.

[0080] In the above embodiment, if the second distance A is less than 30 mm, the airflow is easily blocked by the first end 321 of the second heat exchange element 32, resulting in local vortex or backflow; if the second distance A is greater than 50 mm, it will cause excessive airflow diffusion, reducing wind speed and heat exchange efficiency; therefore, the second distance A is in the range of 30 mm to 50 mm, especially in the range of 32 mm to 45 mm, which can achieve a smooth transition of the airflow, improve the uniformity of the wind speed on the air inlet side of the second heat exchange element 32, shorten the invalid flow path, and increase the airflow rate passing through the heat exchange surface of the second heat exchange element 32 per unit time, thereby effectively improving the heat exchange efficiency of the second heat exchange element 32.

[0081] In some embodiments, the second distance A measures 38 mm.

[0082] In some embodiments, in the first direction X, there is a first distance B between the downstream end 211 of the upper guide plate 21 and the downstream end 221 of the lower guide plate 22, and a second distance A between the first end 321 of the second heat exchange member 32 and the downstream end 221 of the lower guide plate 22. The ratio of the second distance A to the first distance B is in the range of 0.6 to 0.9, preferably 0.7 to 0.8.

[0083] In the above embodiment, if the ratio of the second distance A to the first distance B is less than 0.6, the first end 321 of the second heat exchanger 321 is too close to the downstream end 221 of the lower guide plate 22, easily forming an airflow stagnation zone. If the ratio of the second distance A to the first distance B is greater than 0.9, the first end 321 of the second heat exchanger 321 is too far from the downstream end 221 of the lower guide plate 22, easily diffusing the airflow and reducing the wind speed utilization rate. Therefore, the ratio of the second distance A to the first distance B is controlled within the range of 0.6 to 0.9, preferably 0.7 to 0.8. This ensures that the airflow entering the second heat exchanger 32 remains within the effective guidance range after leaving the lower guide plate 22, reducing disordered airflow diffusion within the housing 1, improving the uniformity of the airflow flowing to the first and second heat exchanger elements 31 and 32, and ensuring a smoother transition of the airflow from between the upper and lower guide plates 21 and 22 to the heat exchange area. This reduces vortexes and backflow, significantly reducing pressure loss and energy loss within the second chamber 12. Especially within the preferred range of 0.7 to 0.8, the airflow can more fully cover the second heat exchange element 32 without causing excessive local wind speed or disturbance due to a short distance; at the same time, it also reduces excessive airflow diffusion caused by the large ratio of the second distance A to the first distance B, and enables the airflow to flow more evenly to the first heat exchange element 31 and the second heat exchange element 32, thereby improving the overall heat exchange efficiency of the heat exchanger 3.

[0084] In some embodiments, the ratio of the second distance A to the first distance B is 0.74.

[0085] In some embodiments, in the second direction Y, there is a third distance H between the upstream end of the upper guide plate 21 and the upstream end of the lower guide plate 22, and the third distance H ranges from 70 mm to 100 mm, preferably 80 mm to 90 mm. The second direction Y is parallel to the direction from the top to the bottom of the shell 1, and the second direction Y intersects with the first direction X.

[0086] In the above embodiment, when the third distance H is in the range of 70mm to 100mm, an effective guide space that is adapted to the cross-section of the air outlet 23 of the fan 2 can be formed; if the third distance H is less than 70mm, it may cause the airflow channel to be narrow, increase the flow resistance, and reduce the air supply efficiency; if the third distance H is greater than 100mm, the guiding effect will be weakened, resulting in serious airflow diffusion and reduced control accuracy; therefore, the third distance H is in the range of 70mm to 100mm, preferably 80mm to 90mm, which can not only ensure sufficient flow area, but also maintain good guiding performance, so that the transition of the airflow from the outlet of the fan 2 to the guide plate is smoother, reducing energy loss, and also helping to maintain the pressure stability at the air outlet 23 of the fan 2, thereby improving the operating efficiency of the whole machine.

[0087] In the above embodiment, the third distance H corresponds to the air outlet height of the centrifugal fan volute.

[0088] In some embodiments, the third distance H is 84 mm.

[0089] In some embodiments, the upstream end of the upper guide plate 21 is located within the first cavity 11 and is connected to the volute of the fan 2. The upstream end of the lower guide plate 22 is located within the first cavity 11 and is connected to the volute of the fan 2. The upper guide plate 21 and the lower guide plate 22 serve as the volute tongue of the fan 2 and are used to guide the airflow.

[0090] The downstream end of the upper guide plate 21 extends into the second cavity 12, and the downstream end of the lower guide plate 22 is connected to the top of the partition plate 4 and extends to the side of the partition plate 4 located in the second cavity 12. The downstream end of the upper guide plate 21 extends to the second cavity 12 to a greater extent than the downstream end of the lower guide plate 22.

[0091] In some embodiments, the direction from the upstream end to the downstream end of the upper guide plate 21 is substantially parallel to the first direction X, and the direction from the upstream end to the downstream end of the lower guide plate 22 forms an angle greater than zero with the first direction X. The downstream end of the lower guide plate 22 is located obliquely below the upstream end of the lower guide plate 22. The inclined configuration of the lower guide plate 22 can better guide the airflow to the second heat exchange element 32, thereby improving the heat exchange efficiency of the second heat exchange element 32.

[0092] In some embodiments, in the first direction X, there is a fourth distance G between the center of the fan 2 and the first end of the second heat exchange element 32 . The fourth distance G ranges from 130 mm to 170 mm, preferably from 140 mm to 160 mm.

[0093] In the above embodiment, the airflow delivered by the fan 2 requires a certain amount of diffusion and rectification space before entering the heat exchange area; the fourth distance G defines the flow path length of the airflow from the center of the fan 2 to the first end of the second heat exchange element 32; if the fourth distance G is less than 130 mm, the airflow may enter the heat exchange area before it is fully expanded, which may easily cause local wind speed to be too high and the pressure loss to increase; if the fourth distance G is greater than 170 mm, it may cause disorderly diffusion of the airflow inside the shell 1, reducing the wind speed utilization rate; therefore, the size range of the fourth distance G is 130 mm to 170 mm, preferably 140 mm to 160 mm, which can enable the airflow to obtain a better rectification effect, which is conducive to forming a uniform and stable heat exchange airflow field, and improving the heat exchange efficiency and heat exchange effect; in addition, limiting the fourth distance G to the range of 130 mm to 170 mm helps to shorten the dimension between the fan 2 and the heat exchanger 3 in the first direction X, reduce the overall width of the air conditioner indoor unit, and make the overall structure more compact.

[0094] In some embodiments, the fourth distance G has a dimension of 150 mm.

[0095] In some embodiments, in the first direction X, there is a fifth distance F between the center of the fan 2 and the downstream end of the lower guide plate 22 , and the fifth distance F has a size range of 95 mm to 125 mm, preferably 100 mm to 115 mm.

[0096] In the above embodiment, the lower guide plate 22 is mainly used to guide the airflow to the second heat exchange element 32. A reasonable fifth distance F can enable the airflow to have good velocity distribution and directionality when entering the active area of the lower guide plate 22; if the fifth distance F is less than 95mm, the airflow enters the guiding area before it is fully expanded, which may easily cause local wind speed to be too high and pressure loss to increase; if the fifth distance F is greater than 125mm, it may cause excessive airflow diffusion and reduce the guiding effect; therefore, the size range of the fifth distance F is 95mm~125mm, preferably 100mm~115mm, which can improve the control ability of the lower guide plate 22 on the airflow, reduce eddy and backflow phenomena, and improve the airflow delivery efficiency to the second heat exchange element 32, thereby improving the overall heat exchange performance.

[0097] In some embodiments, the fifth distance F has a dimension of 108 mm.

[0098] In some embodiments, in the first direction X, there is a fourth distance G between the center of the fan 2 and the first end of the second heat exchange element 32, and a fifth distance F between the center of the fan 2 and the downstream end of the lower guide plate 22, and the ratio of the fourth distance G to the fifth distance F ranges from 1.1 to 1.7, preferably from 1.3 to 1.5.

[0099] In the above embodiment, the fourth distance G represents the distance from the center of the fan 2 to the first end of the second heat exchange element 32, i.e., the length of the airflow path toward the heat exchange area. The fifth distance F represents the distance from the center of the fan 2 to the end of the lower guide plate 22, i.e., the free diffusion section before the airflow enters the guide area. After exiting the air outlet 23 of the fan 2, the airflow first passes through the free diffusion section of the fifth distance F, is then directed by the lower guide plate 22, and finally enters the second heat exchange element 32 for heat exchange.

[0100] The ratio of the fourth distance G to the fifth distance F reflects the path distribution characteristics of the airflow starting from the air outlet 23 of the fan 2 and reaching the heat exchanger after guidance control. If the ratio of the fourth distance G to the fifth distance F is less than 1.1, the first end of the second heat exchanger 32 is too close to the downstream end of the lower guide plate 22, which may cause the airflow to enter the heat exchange area before it is fully expanded, resulting in excessive local wind speed and increased pressure loss; if the ratio of the fourth distance G to the fifth distance F is greater than 1.7, the first end of the second heat exchanger 32 is too far from the downstream end of the lower guide plate 22, and the airflow diffuses severely inside the shell 1, reducing the wind speed utilization rate; therefore, the ratio of the fourth distance G to the fifth distance F is in the range of 1.1 to 1.7, preferably 1.3 to 1.5, which can not only enable the airflow to obtain sufficient diffusion space, but also be guided to the heat exchange area in time, thereby achieving the unity of efficient heat exchange and stable airflow organization.

[0101] The ratio range of the fourth distance G to the fifth distance F is preferably 1.3 to 1.5, which can make the airflow supply to the second heat exchanger 32 more sufficient and will not cause airflow attenuation due to the long path, thereby achieving dynamic balance and coordinated air supply between the corresponding areas of the first heat exchanger 31 and the second heat exchanger 32.

[0102] Furthermore, the ratio of the fourth distance G to the fifth distance F is in the range of 1.1 to 1.7, preferably 1.3 to 1.5, which can also shorten the overall length of the housing 1, making the structure of the air conditioner indoor unit more compact and facilitating miniaturization.

[0103] In some embodiments, a ratio of the fourth distance G to the fifth distance F is 1.4.

[0104] In some embodiments, the impeller radius R of the fan 2 ranges from 60 mm to 80 mm, preferably from 65 mm to 75 mm.

[0105] In the above embodiment, the impeller radius R is a key parameter that determines the air output, static pressure capability and overall size of the fan 2 .

[0106] In the above embodiment, if the impeller radius R of fan 2 is too small, less than 60 mm, it will be difficult to meet the wind speed and air volume required by heat exchanger 3, affecting heat exchange efficiency. If the impeller radius R of fan 2 is too large, greater than 80 mm, it may cause the volume of fan 2 to exceed the standard, affecting the compactness of the entire machine structure. Therefore, the impeller radius R of fan 2 is between 60 mm and 80 mm, preferably between 65 mm and 75 mm. This allows fan 2 to output a stable airflow with low power consumption, maintain efficient operation within a wide operating range, and reduce starting current and operating noise.

[0107] The impeller radius R of fan 2 also affects the size of the outlet cross-section and airflow distribution characteristics. If the impeller radius R of fan 2 is too large, the airflow diffusion angle is large, which can easily prevent the guide plate from effectively concentrating the airflow. If the impeller radius R of fan 2 is too small, the airflow intensity is insufficient, affecting heat exchange efficiency. Therefore, the impeller radius R of fan 2 is between 60mm and 80mm, preferably between 65mm and 75mm. This can ensure a good match between the outlet airflow of fan 2 and the guide plate, which is conducive to achieving uniform air supply and efficient heat exchange.

[0108] Furthermore, the impeller radius R of the fan 2 is between 60 mm and 80 mm, preferably between 65 mm and 75 mm, which also helps to control the distance between the fan 2 and the heat exchanger 3 along the first direction X (such as the fourth distance G and the fifth distance F), thereby improving the compactness of the overall structure and facilitating the miniaturization of the air-conditioning indoor unit.

[0109] In some embodiments, the impeller radius R of the fan 2 is 70 mm.

[0110] In some embodiments, in the first direction X, there is a fourth distance G between the center of the fan 2 and the first end of the second heat exchange element 32 , and the ratio of the fourth distance G to the impeller radius R of the fan 2 is in the range of 1.8 to 2.5, preferably 2 to 2.3.

[0111] In the above embodiment, the fourth distance G represents the distance from the center of the fan 2 to the first end of the second heat exchange element 32, that is, the path length of the airflow to the heat exchange area. The impeller radius R determines the airflow volume, static pressure capacity, and airflow diffusion characteristics of the fan 2. The ratio of the fourth distance G to the impeller radius R of the fan 2 reflects the relative path distribution characteristics of the airflow from the air outlet 23 of the fan 2 to the heat exchange area.

[0112] After the air flow is sent out from the air outlet 23 of the fan 2, it needs a certain diffusion and rectification space before entering the heat exchange area. If the ratio of the fourth distance G to the impeller radius R of the fan 2 is less than 1.8, it means that the heat exchanger 3 is too close to the fan 2, and the air flow enters the heat exchange area before it is fully expanded, which may easily cause the local wind speed to be too high and the pressure loss to increase; if the ratio of the fourth distance G to the impeller radius R of the fan 2 is greater than 2.5, the heat exchanger 3 is too far away from the fan 2, and the air flow diffuses disorderly inside the shell 1, reducing the wind speed utilization rate; therefore, the ratio of the fourth distance G to the impeller radius R of the fan 2 is in the range of 1.8 to 2.5, preferably 2 to 2.3, which can enable the air flow to obtain a better rectification effect, is conducive to forming a uniform and stable heat exchange airflow field, improves the heat exchange efficiency of the second heat exchange component 32, and also helps to reduce vibration and noise caused by airflow impact.

[0113] Furthermore, the ratio of the fourth distance G to the impeller radius R of the fan 2 is in the range of 1.8 to 2.5, preferably 2 to 2.3, which can also shorten the overall length of the shell 1 while ensuring the effectiveness of the air flow channel, optimizing the space utilization efficiency of the overall structure, and improving the compactness and energy efficiency of the air conditioner indoor unit.

[0114] In some embodiments, the ratio of the fourth distance G to the impeller radius R of the fan 2 is 2.14.

[0115] In some embodiments, in the first direction X, there is a fifth distance F between the center of the fan 2 and the downstream end of the lower guide plate 22, and the ratio of the fifth distance F to the impeller radius R of the fan 2 is in the range of 1.2 to 1.8, preferably 1.4 to 1.7.

[0116] In the above embodiment, the fifth distance F represents the distance from the center of the fan 2 to the end of the lower guide plate 22; the impeller radius R determines the air output, static pressure capacity and airflow diffusion characteristics of the fan 2; the ratio of the fifth distance F to the impeller radius R of the fan 2 reflects the relative path distribution characteristics of the airflow from the air outlet of the fan 2 to the heat exchange area.

[0117] In the above embodiment, if the ratio of the fifth distance F to the impeller radius R of the fan 2 is less than 1.2, it means that the downstream end of the lower guide plate 22 is too close to the fan 2, and the airflow leaves the guide area before it is fully expanded, causing the airflow to diffuse disorderly inside the shell 1, thereby reducing the guide efficiency; if the ratio of the fifth distance F to the impeller radius R of the fan 2 is greater than 1.8, the downstream end of the lower guide plate 22 is too far from the fan 2, which may easily cause the local wind speed to be too high and the pressure loss to increase; therefore, the ratio of the fifth distance F to the impeller radius R of the fan 2 is in the range of 1.2 to 1.8. , preferably 1.4 to 1.7, which can make the airflow obtain better rectification effect, is conducive to forming a uniform and stable guided airflow, reduces ineffective diffusion, and increases the wind speed and air volume at the inlet of the heat exchanger; improves the wind speed uniformity and heat exchange efficiency on the surface of the second heat exchanger 32, and optimizes the airflow distribution ratio between the corresponding areas of the first heat exchanger 31 and the second heat exchanger 32, which can make the airflow flowing to the lower second heat exchanger 32 sufficient, and will not cause airflow turbulence due to too short a distance, thereby realizing dynamic balance and coordinated air supply between the upper and lower heat exchange areas.

[0118] In some embodiments, the ratio of the fifth distance F to the impeller radius R of the fan 2 is 1.54.

[0119] In some embodiments, the first heat exchange element 31 forms a third angle α with the first line L, the second heat exchange element 32 forms a fourth angle β with the first line L, the third angle α is greater than the fourth angle β, and the first line is parallel to the first direction X.

[0120] In the above embodiment, the third angle α formed by the upper first heat exchange element 31 and the first line L is larger, and the fourth angle β formed by the lower second heat exchange element 32 and the first line L is smaller. The first heat exchange element 31 and the second heat exchange element 32 have different response characteristics to the airflow path. This differentiated design can dynamically adjust the air supply ratio of the upper and lower heat exchange areas according to the actual airflow direction, avoiding excessive or insufficient air supply in some areas, thereby achieving airflow balance and coordinated work between the upper and lower heat exchange areas.

[0121] The first heat exchanger 31 adopts a larger inclination angle (third angle α), which can better receive the concentrated airflow from the upper guide plate 21; the second heat exchanger 32 adopts a smaller inclination angle (fourth angle β), which can more effectively receive the diffused airflow from the lower guide plate 22; in the configuration where the third angle α is greater than the fourth angle β, the airflow path can be smoother and the pressure distribution can be more uniform, which helps to reduce the load fluctuation of the fan 2, reduce the risk of low-frequency resonance, improve the quiet effect and operation smoothness during use, and can also improve the overall consistency and heat exchange efficiency of the airflow organization.

[0122] In the above embodiment, the inclined arrangement of the first heat exchanger 31 and the second heat exchanger 32 can also increase the heat exchange area, and flexibly adjust the installation position of the first heat exchanger 31 and the second heat exchanger 32 in the shell 1, which helps to shorten the height dimension and improve the integration.

[0123] In some embodiments, the first heat exchange element 31 forms a third angle α with the first line L, and the angle range of the third angle α is 40° to 55°, preferably 43° to 50°; the first line L is parallel to the first direction X.

[0124] In the above embodiment, the first heat exchanger 31 is located at the upper portion of the housing 1 and corresponds to the downstream front air outlet (first outlet 13). The first heat exchanger 31 is set at an appropriate inclination angle (third angle α) so that it can more effectively receive the mainstream airflow guided from the upper guide plate 21. If the third angle α is less than 40°, the first heat exchanger 31 is too close to the horizontal direction, which may cause the airflow to slide over the surface without sufficient contact, thereby reducing the heat exchange efficiency. If the third angle α is greater than 55°, the first heat exchanger 31 is too vertical, which may cause the local wind speed to be too high and the pressure loss to increase. Therefore, the angle range of the third angle α is 40° to 55°, preferably 43° to 50°, which can enable the surface of the first heat exchanger 31 to obtain a better airflow coverage effect, improve the heat exchange capacity per unit area, reduce the flow resistance of the entire system, improve the air supply efficiency of the fan 2, and improve the utilization rate of the heat exchange surface of the first heat exchanger 31, which helps to achieve an efficient and stable heat exchange process.

[0125] The third angle α is preferably 43° to 50°, which can make the direction consistency of the airflow better when entering the heat exchange area, reduce eddy currents and backflows, make it easier for the airflow to flow smoothly along the heat exchange surface, and reduce the risk of boundary layer separation.

[0126] Furthermore, the inclined arrangement of the first heat exchange element 31 can maintain good heat exchange performance of the first heat exchange element 31 while increasing its heat exchange area, and can also flexibly adjust its installation position in the shell 1 so that the first heat exchange element 31 avoids other internal components (such as the wind guide plate and other components set at the first outlet 13), which is conducive to the miniaturization of the air-conditioning indoor unit.

[0127] In some embodiments, the third angle α is 46.5°.

[0128] In some embodiments, the second heat exchange element 32 forms a fourth angle β with the first line L, and the angle range of the fourth angle β is 25° to 45°, preferably 32° to 38°; the first line L is parallel to the first direction X.

[0129] In the above embodiment, the second heat exchanger 32 is located at the lower part of the shell 1, corresponding to the lower air outlet (second outlet 14). The second heat exchanger 32 is set with an appropriate inclination angle (fourth angle β) to make the airflow cover its heat exchange surface more evenly, avoiding local wind speed being too high or too low; if the fourth angle β is less than 25°, the second heat exchanger 32 is too close to the horizontal direction, which may cause the airflow to slide over the surface without sufficient contact, thereby reducing the heat exchange efficiency; if the fourth angle β is greater than 45°, the second heat exchanger 32 is too vertical, which may cause excessive local pressure loss and uneven airflow distribution. Therefore, the angle range of the fourth angle β is 25° to 45°, preferably 32° to 38°, which can make it easier for the airflow to flow smoothly along the heat exchange surface, reduce the risk of boundary layer separation, reduce the flow resistance of the entire system, improve the air supply efficiency of the fan, obtain uniform airflow distribution, and enhance the overall heat exchange capacity.

[0130] Furthermore, the inclined arrangement of the second heat exchange element 32 allows for flexible adjustment of its installation position within the housing 1 while increasing its heat exchange area. The fourth angle β ranges from 25° to 45°, preferably from 32° to 38°. This allows the second heat exchange element 32 to maintain good heat exchange performance while avoiding other internal components (e.g., the air guide plates provided at the first and second air outlets 13 and 14), thus contributing to a more compact and miniaturized structure for the air conditioner indoor unit.

[0131] In some embodiments, the fourth angle β is 35.5°.

[0132] In some embodiments, the first angle formed between the first heat exchange element 31 and the second heat exchange element 32 is in the range of 70° to 90°, preferably 80° to 85°.

[0133] In the above embodiment, the first heat exchange element 31 and the second heat exchange element 32 constitute the main flow path of the outlet airflow of the fan 2. Setting an appropriate first angle can form a guide space between the two to adapt to the direction of the mainstream airflow. If the first angle is too small, less than 70°, the distance between the first heat exchange element 31 and the second heat exchange element 32 is too narrow, resulting in a restricted airflow channel, increased flow resistance, and unfavorable for improving heat exchange efficiency. If the first angle is too large, greater than 90°, the first heat exchange element 31 and the second heat exchange element 32 are too dispersed, reducing the guiding effect, and the airflow is easily diffused, affecting the air supply efficiency, which in turn also reduces the heat exchange efficiency. Therefore, the first angle range is 70° to 90°, preferably 80° to 85°. This can not only improve the overall ventilation efficiency and maintain the balance between the upper and lower airflows, but also prevent the airflow density in some areas from being too high or too low, making the airflow distribution between the upper and lower heat exchange areas more uniform, preventing local overcooling or overheating caused by uneven airflow, and improving the stability of equipment operation and user comfort.

[0134] In some embodiments, the upper guide plate 21 and the lower guide plate 22 are used to guide airflow to the corresponding heat exchange element. The first angle between the first heat exchange element 31 and the second heat exchange element 32 must match their guide path. The first angle ranges from 70° to 90°, preferably 80° to 85°. This allows the space between the first heat exchange element 31 and the second heat exchange element 32 to be more conducive to receiving the concentrated airflow from the upper guide plate 21 and the lower guide plate 22, thereby improving the utilization rate of the heat exchange surface and facilitating an efficient and stable heat exchange process. Furthermore, the setting of the first angle can shorten the space within the housing 1 along the first direction X without sacrificing the heat exchange area, thereby facilitating a miniaturized design. Furthermore, the first angle between the first heat exchange element 31 and the second heat exchange element 32 also facilitates avoiding other internal components (such as the air guide plates provided at the first air outlet 13 and the second air outlet 14), preventing interference with other components.

[0135] In some embodiments, the first angle is 82.5°.

[0136] In some embodiments, a partition 4 is provided in the housing 1, which divides the housing 1 into a first chamber 11 for accommodating the fan 2 and a second chamber 12 for accommodating the heat exchanger 3. The sum of the dimensions of the first chamber 11 and the second chamber 12 extending along the first direction X is a first width E, and the dimension of the second chamber 12 extending along the first direction X is a second width D, which accounts for 40% to 45% of the first width E.

[0137] In the above embodiment, the length of the heat exchange zone (i.e., the second width D) is controlled to 40% to 45% of the width of the entire machine (i.e., the first width E). This can reduce the airflow separation, vortex and backflow phenomena caused by unreasonable space utilization, shorten the size of the shell 1 in the first direction X, improve the compactness of the internal structure of the shell 1, and facilitate the miniaturization design of the air conditioner indoor unit.

[0138] In some embodiments, the first width E ranges from 380 mm to 410 mm, and the second width D ranges from 155 mm to 185 mm.

[0139] In the above embodiment, by limiting the first width E to 380 mm to 410 mm and the second width D to 155 mm to 185 mm, refined control of the internal spatial layout of the housing 1 is achieved. By setting specific ranges for the first width E and the second width D, the ratio of the second width D to the first width E falls within the target range, thereby ensuring a moderate distance between the outlet of the fan 2 and the heat exchanger 3. This allows the airflow to smoothly transition to the heat exchange area after leaving the fan 2, reducing eddy currents and pressure losses caused by sudden changes in the path, improving the air supply efficiency of the fan 2 and the uniformity of the wind speed distribution on the surface of the heat exchanger, and achieving a compact structure with high efficiency.

[0140] The first width E has a size range of 380mm to 410mm, which meets the demand for thinness and lightness of home appliances. At the same time, the second width D has a size range of 155mm to 185mm, which can ensure that the length of the heat exchanger reaches more than 160mm, meeting the basic requirements of the heat exchange area.

[0141] In some embodiments, the dimension of the first cavity 11 extending along the first direction X is a third width C, and the third width C can be 225 mm.

[0142] refer to Figure 3 In some embodiments, a first air outlet 13 is provided on the side wall of the shell 1 in the first direction X, and a second air outlet 14 is provided at the bottom of the shell 1. A first opening dimension M of the first air outlet 13 extending along the second direction Y ranges from 100 mm to 130 mm, preferably from 105 mm to 120 mm, and a second opening dimension N of the second air outlet 14 extending along the first direction X ranges from 45 mm to 75 mm, preferably from 50 mm to 65 mm; wherein the second direction Y is parallel to the direction from the top to the bottom of the shell 1, and the second direction Y intersects with the first direction X.

[0143] In the above embodiment, the air-conditioning indoor unit has a first air outlet 13 and a second air outlet 14. The first air outlet 13 is correspondingly arranged at the front side of the air-conditioning indoor unit for discharging air to the front side of the air-conditioning indoor unit, and the second air outlet 14 is correspondingly arranged at the bottom of the air-conditioning indoor unit for discharging air from the bottom of the air-conditioning indoor unit.

[0144] In the above embodiment, the first air outlet 13 is the front air outlet of the air-conditioning indoor unit, which is used to supply air to the upper part of the indoor space, suitable for quickly adjusting the temperature and avoiding direct blowing of cold air; the second air outlet 14 is the lower air outlet of the air-conditioning indoor unit, which is responsible for supplying air downward, and is often used for comfort control in the area near the floor to improve the temperature adjustment speed.

[0145] In the above embodiment, if the first opening size M or the second opening size N is too large, it may cause the wind speed on the outlet side of the heat exchanger 3 to decrease, affecting the heat exchange efficiency; if the second opening size N or the second opening size N is too small, the local resistance will increase, resulting in an increase in the load of the fan 2; therefore, the range of the first opening size M is 100mm~130mm, preferably 105mm~120mm, and the range of the second opening size N is 45mm~75mm, preferably 50mm~65mm, which can make the airflow easier to maintain a laminar state, reduce the energy loss caused by boundary layer separation, improve the air supply efficiency of the fan, reduce the system operation energy consumption, improve the heat exchange efficiency per unit time, and improve the overall performance of the equipment, especially in miniaturized air-conditioning indoor units. Reasonable air outlet size can reduce the volume of the whole machine without sacrificing performance.

[0146] In the above embodiment, the first air outlet 13 can discharge air alone, the second air outlet 14 can discharge air alone, or the first air outlet 13 and the second air outlet 14 can discharge air at the same time. By reasonably setting the ratio of the first opening size M and the second opening size N, it helps to achieve a dynamic balance between the upper and lower air supply; if the first opening size M is too small, the upper air supply capacity will be limited; if the second opening size N is too large, the bottom airflow may be too strong and affect the overall comfort.

[0147] In some embodiments, the first opening dimension M is 110 mm; the second opening dimension N is 57 mm.

[0148] In some embodiments, a partition 4 is provided in the shell 1, which divides the shell 1 into a first chamber 11 for accommodating the fan 2 and a second chamber 12 for accommodating the heat exchanger 3; the second chamber 12 is provided with a first air outlet 13 on the side wall located in the first direction X, and a second air outlet 14 is provided at the bottom of the second chamber 12; the dimension of the first chamber 11 extending along the first direction X is a third width C, and the dimension of the second chamber 12 extending along the first direction X is a second width D, and the second width D is equal to the third width C.

[0149] In the above embodiment, the third width C is equal to the second width D, which means that the first cavity 11 accommodating the fan 2 and the second cavity 12 accommodating the heat exchanger 3 have the same size in the first direction X; under the equal-width structure, the transition distance between the fan 2 and the heat exchanger 3 is consistent, which helps to form a uniform and stable airflow field, reduce local eddies and backflow phenomena caused by asymmetric flow, reduce pressure loss, improve ventilation efficiency, and reduce vibration and noise caused by airflow disturbances.

[0150] In addition, for air-conditioning indoor units that require a compact layout, the equal-width design helps to compress the width space while still ensuring sufficient heat exchange area and fan installation space, achieving the best balance between space utilization and performance assurance.

[0151] In the above embodiment, the first air outlet 13 and the second air outlet 14 are used to guide the air flow to discharge from the front and the bottom of the shell 1 respectively. The user can choose to discharge air from the first air outlet 13, or the second air outlet 14, or the first air outlet 13 and the second air outlet 14 at the same time as needed to meet the different needs of the user and improve the comfort of use.

[0152] In some embodiments, the first air outlet 13 and the second air outlet 14 are simultaneously provided on the shell 1, the dimension of the shell 1 extending along the first direction X is 450 mm, the first cavity 11 and the second cavity 12 each occupy half, and the dimensions of the first cavity 11 and the second cavity 12 extending along the first direction X are both 225 mm.

[0153] In some embodiments, the first opening dimension M of the first air outlet 13 is larger than the second opening dimension N of the second air outlet 14. Since the first heat exchange element 31 corresponds to the first air outlet 13 and the second heat exchange element 32 corresponds to the second air outlet 14, the dimension from the first end to the second end of the first heat exchange element 31 is larger than the dimension from the first end to the second end of the second heat exchange element 32. This ensures that the corresponding larger air outlet has a matching airflow capacity and heat exchange area, thereby improving the heat exchange effect. Furthermore, the third angle α formed by the first heat exchange element 31 and the first line L is larger than the fourth angle β formed by the second heat exchange element 32 and the first line L. This configuration not only adapts to the structural layout in which the first opening dimension M of the first air outlet 13 is larger than the second opening dimension N of the second air outlet 14, but also helps improve the airflow coverage and heat exchange efficiency of the upper heat exchange area. The angle and location of the first angle formed between the first heat exchange element 31 and the second heat exchange element 32 also prevent interference with the air deflectors provided at the first and second air outlets 13 and 14, thereby ensuring the normal operation of the air deflectors.

[0154] Some embodiments of the present disclosure further provide an air conditioner, comprising any of the above-mentioned air conditioner indoor units.

[0155] In some embodiments, the air conditioner comprises a ducted unit.

[0156] Based on the above-mentioned embodiments of the present disclosure, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0157] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An air conditioner indoor unit, characterized in that: It comprises a housing (1), and a fan (2) and a heat exchanger (3) sequentially arranged in the housing (1) along a first direction (X); The heat exchanger (3) comprises a first heat exchange element (31) and a second heat exchange element (32), wherein a first end portion of the first heat exchange element (31) extends toward the top of the shell (1), and a first end portion of the second heat exchange element (32) extends toward the bottom of the shell (1), a second end portion of the first heat exchange element (31) is adjacent to a second end portion of the second heat exchange element (32), and a first angle is formed between the first heat exchange element (31) and the second heat exchange element (32); The fan (2) comprises an air outlet (23), an upper guide plate (21) of the air outlet (23) extends toward a first end portion of the first heat exchange element (31), and a lower guide plate (22) of the air outlet (23) extends toward a first end portion of the second heat exchange element (32).

2. The air conditioner indoor unit according to claim 1, characterized in that: A partition (4) is provided in the shell (1), and the partition (4) divides the shell (1) into a first chamber (11) for accommodating the fan (2) and a second chamber (12) for accommodating the heat exchanger (3). A connecting portion is provided on the upper portion of the partition (4), and the air outlet (23) is provided in the connecting portion. The downstream end of the upper guide plate (21) passes through the connecting portion and is located in the second chamber (12), and the downstream end of the lower guide plate (22) is connected to the top of the partition (4).

3. The air conditioner indoor unit according to claim 1, characterized in that: A second angle (λ) is formed between the upper guide plate (21) and the lower guide plate (22), and the angle range of the second angle (λ) is 25° to 40°, preferably 30° to 35°.

4. The air conditioner indoor unit according to claim 1, characterized in that: In the first direction (X), the downstream end of the upper guide plate (21) is closer to the heat exchanger (3) relative to the downstream end of the lower guide plate (22).

5. The air conditioner indoor unit according to claim 4, characterized in that: In the first direction (X), there is a first distance (B) between the downstream end of the upper guide plate (21) and the downstream end of the lower guide plate (22), and the size range of the first distance (B) is 40mm to 60mm, preferably 45mm to 55mm.

6. The air conditioner indoor unit according to claim 4, characterized in that: In the first direction (X), the first end of the second heat exchange member (32) is located between the downstream end of the upper guide plate (21) and the downstream end of the lower guide plate (22).

7. The air conditioner indoor unit according to claim 6, characterized in that: In the first direction (X), there is a second distance (A) between the first end of the second heat exchange element (32) and the downstream end of the lower guide plate (22), and the size range of the second distance (A) is 30mm to 50mm, preferably 32mm to 45mm.

8. The air conditioner indoor unit according to claim 6, characterized in that: In the first direction (X), there is a first distance (B) between the downstream end of the upper guide plate (21) and the downstream end of the lower guide plate (22), and there is a second distance (A) between the first end of the second heat exchange element (32) and the downstream end of the lower guide plate (22), and the ratio of the second distance (A) to the first distance (B) ranges from 0.6 to 0.9, preferably from 0.7 to 0.

8.

9. The air conditioner indoor unit according to claim 1, characterized in that: In the second direction (Y), there is a third distance (H) between the upstream end of the upper guide plate (21) and the upstream end of the lower guide plate (22), and the range of the third distance (H) is 70mm to 100mm, preferably 80mm to 90mm, and the second direction (Y) is parallel to the direction from the top to the bottom of the shell (1), and the second direction (Y) intersects with the first direction (X).

10. The air conditioner indoor unit according to claim 1, characterized in that: In the first direction (X), there is a fourth distance (G) between the center of the fan (2) and the first end of the second heat exchange element (32), and the size range of the fourth distance (G) is 130mm to 170mm, preferably 140mm to 160mm.

11. The air conditioner indoor unit according to claim 1, characterized in that: In the first direction (X), there is a fifth distance (F) between the center of the fan (2) and the downstream end of the lower guide plate (22), and the size range of the fifth distance (F) is 95mm to 125mm, preferably 100mm to 115mm.

12. The air conditioner indoor unit according to claim 1, characterized in that: In the first direction (X), there is a fourth distance (G) between the center of the fan (2) and the first end of the second heat exchange element (32), and there is a fifth distance (F) between the center of the fan (2) and the downstream end of the lower guide plate (22), and the ratio of the fourth distance (G) to the fifth distance (F) ranges from 1.1 to 1.7, preferably from 1.3 to 1.

5.

13. The air conditioner indoor unit according to claim 1, characterized in that: The impeller radius (R) of the fan (2) ranges from 60 mm to 80 mm, preferably from 65 mm to 75 mm.

14. The air conditioner indoor unit according to claim 1, characterized in that: In the first direction (X), there is a fourth distance (G) between the center of the fan (2) and the first end of the second heat exchange element (32), and the ratio of the fourth distance (G) to the impeller radius (R) of the fan (2) is in the range of 1.8 to 2.5, preferably 2 to 2.

3.

15. The air conditioner indoor unit according to claim 1, characterized in that: In the first direction (X), there is a fifth distance (F) between the center of the fan (2) and the downstream end of the lower guide plate (22), and the ratio of the fifth distance (F) to the impeller radius (R) of the fan (2) ranges from 1.2 to 1.8, preferably from 1.4 to 1.

7.

16. The air conditioner indoor unit according to claim 1, characterized in that: The first heat exchange element (31) forms a third angle (α) with the first line (L), the second heat exchange element (32) forms a fourth angle (β) with the first line (L), the third angle (α) is greater than the fourth angle (β), and the first line (L) is parallel to the first direction (X).

17. The air conditioner indoor unit according to claim 1, characterized in that: The first heat exchange element (31) forms a third angle (α) with the first line (L), and the angle range of the third angle (α) is 40° to 55°, preferably 43° to 50°; the first line (L) is parallel to the first direction (X).

18. The air conditioner indoor unit according to claim 1, characterized in that: The second heat exchange element (32) forms a fourth angle (β) with the first line (L), and the angle range of the fourth angle (β) is 25° to 45°, preferably 32° to 38°; the first line (L) is parallel to the first direction (X).

19. The air conditioner indoor unit according to claim 1, wherein: The first angle ranges from 70° to 90°, preferably from 80° to 85°.

20. The air conditioner indoor unit according to claim 1, characterized in that: A partition (4) is provided in the shell (1), and the partition (4) divides the shell (1) into a first chamber (11) for accommodating the fan (2) and a second chamber (12) for accommodating the heat exchanger (3). The sum of the dimensions of the first chamber (11) and the second chamber (12) extending along the first direction (X) is a first width (E), and the dimension of the second chamber (12) extending along the first direction (X) is a second width (D), and the second width (D) accounts for 40% to 45% of the first width (E).

21. The air conditioner indoor unit according to claim 20, characterized in that: The first width (E) has a size range of 380 mm to 410 mm, and the second width (D) has a size range of 155 mm to 185 mm.

22. The air conditioner indoor unit according to claim 1, characterized in that: The shell (1) is provided with a first air outlet (13) on a side wall located in the first direction (X), and a second air outlet (14) is provided at the bottom of the shell (1); a first opening size (M) of the first air outlet (13) extending along the second direction (Y) ranges from 100 mm to 130 mm, preferably from 105 mm to 120 mm, and a second opening size (N) of the second air outlet (14) extending along the first direction (X) ranges from 45 mm to 75 mm, preferably from 50 mm to 65 mm; wherein the second direction (Y) is parallel to a direction from the top to the bottom of the shell (1), and the second direction (Y) intersects with the first direction (X).

23. The air conditioner indoor unit according to claim 1, characterized in that: A partition (4) is provided in the shell (1), and the partition (4) divides the shell (1) into a first chamber (11) for accommodating the fan (2) and a second chamber (12) for accommodating the heat exchanger (3); a first air outlet (13) is provided on the side wall of the second chamber (12) located in the first direction (X), and a second air outlet (14) is provided at the bottom of the second chamber (12); the dimension of the first chamber (11) extending along the first direction (X) is a third width (C), and the dimension of the second chamber (12) extending along the first direction (X) is a second width (D), and the second width (D) is equal to the third width (C).

24. An air conditioner, characterized in that: It comprises the air-conditioning indoor unit according to any one of claims 1 to 23.

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