Air conditioner

Abstract

The utility model provides an air conditioner, and relates to the technical field of household appliances. The air conditioner comprises a shell defining a containing cavity, an air return opening is formed in the shell, the plane where the air return opening is located is a first plane, the air return opening comprises a first area and a second area which are sequentially arranged, the first area is provided with first grating ribs, and the second area is provided with second grating ribs; the multi-fold heat exchanger is arranged in the containing cavity and comprises a first heat exchange part and a second heat exchange part which are connected, the orthographic projection of the first heat exchange part on the first plane is located in the first area, the included angle between the first heat exchange part and the first plane is alpha 1, and the orthographic projection of the second heat exchange part on the first plane is located in the second area; the included angle between the second heat exchange part and the first plane is alpha 2; the included angle alpha 3 between the first grating ribs and the first plane meets the condition that 90 degrees < = alpha 3 < = alpha 1, and the included angle alpha 4 between the second grating ribs and the first plane meets the condition that alpha 2 < = alpha 4 < = 90 degrees. According to the air conditioner, the heat exchange performance and the heat exchange efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an air conditioner. BACKGROUND

[0002] In order to effectively utilize the space inside the air conditioner shell and optimize its performance, multiple folded heat exchangers are often used in air conditioners. By connecting multiple heat exchange parts at different angles, multiple folded heat exchangers not only maximize the use of limited space, but also promote the improvement of heat exchange efficiency. This design allows air to make more contact with the heat exchange surface when flowing through the heat exchanger, thereby improving the efficiency of heat transfer.

[0003] The air inlet structure assembly at the return air inlet of the air conditioner is crucial to the performance of the entire system. These components not only guide external air into the air conditioner, but also directly affect the distribution and flow efficiency of air in the heat exchanger. A well-designed air inlet structure assembly can ensure smooth and uniform air flow into the multiple folded heat exchanger, thereby improving the heat exchange performance of the heat exchanger and reducing unnecessary energy loss.

[0004] In related technologies, the angle compatibility of the air inlet structure assembly and the multiple folded heat exchanger is often insufficient. This incompatibility causes turbulence in the air flow entering the return air inlet when flowing through the heat exchanger, resulting in poor flow and affecting the heat exchange efficiency and the performance of the entire air conditioning system. SUMMARY

[0005] Therefore, the purpose of the present application is to provide an air conditioner.

[0006] The technical scheme adopted by the present application to solve the above technical problems is:

[0007] The present application provides an air conditioner, which comprises:

[0008] a shell defining a receiving cavity, the shell being provided with a return air inlet, the plane where the return air inlet is located being a first plane, the return air inlet comprising a first zone and a second zone arranged in sequence, the first zone being provided with a first grating rib, and the second zone being provided with a second grating rib; and

[0009] a multiple folded heat exchanger arranged in the receiving cavity, the multiple folded heat exchanger comprising a first heat exchange part and a second heat exchange part connected together, the first heat exchange part having a normal projection on the first plane located in the first zone, and the included angle between the first heat exchange part and the first plane being α1, the second heat exchange part having a normal projection on the first plane located in the second zone, and the included angle between the second heat exchange part and the first plane being α2;

[0010] wherein the included angle α3 between the first grating rib and the first plane satisfies 90°≤α3≤α1, and the included angle α4 between the second grating rib and the first plane satisfies α2≤α4≤90°.

[0011] Optionally, in some embodiments of the present application, 90° < α1 < 180°, 0° < α2 < 90°, and 0 < (α1-α2) < 90°.

[0012] Optionally, in some embodiments of the present application, the first area is provided with a plurality of first grid bars, wherein,

[0013] The angle between the plurality of first grid bars and the first plane is α3, and α3 = α1; or

[0014] The angle between the plurality of first grid bars and the first plane increases in a gradient from a direction away from the second grid bar to a direction close to the second grid bar, the angle between the first grid bar farthest from the second grid bar and the first plane is α3' = 90°, the angle between the first grid bar closest to the second grid bar and the first plane is α3'' = α1, and the angle difference between any adjacent first grid bars and the first plane is ≥ 3°.

[0015] Optionally, in some embodiments of the present application, the second area is provided with a plurality of second grid bars, wherein,

[0016] The angle between the plurality of second grid bars and the first plane is α4, and α4 = α2; or

[0017] The angle between the plurality of second grid bars and the first plane decreases in a gradient from a direction away from the first grid bar to a direction close to the first grid bar, the angle between the second grid bar farthest from the first grid bar and the first plane is α4' = 90°, the angle between the second grid bar closest to the first grid bar and the first plane is α4'' = α2, and the angle difference between any adjacent second grid bars and the first plane is ≥ 3°.

[0018] Optionally, in some embodiments of the present application, the air conditioner further comprises a water pan, the water pan is arranged directly below the multi-fold heat exchanger and between the multi-fold heat exchanger and the return air inlet;

[0019] The water pan comprises a bottom wall and a side wall extending from the bottom wall in a direction close to the multi-fold heat exchanger, the side wall comprises a first side wall arranged in parallel with the first heat exchange part and a second side wall arranged in parallel with the second heat exchange part, and the bottom wall is arranged directly below the connection between the first heat exchange part and the second heat exchange part.

[0020] Optionally, in some embodiments of the present application, the return air inlet further comprises a third area between the first area and the second area, the third area is provided with a third grid bar;

[0021] The normal projection of the first side wall on the first plane is located in the first area, the normal projection of the second side wall on the first plane is located in the second area, the bottom wall is parallel to the first plane and the normal projection of the bottom wall on the first plane is located in the third area, and the angle a5 between the third grid rib and the first plane satisfies: a5 = 90°.

[0022] Optionally, in some embodiments of the present application, the shell is further provided with an air outlet, the plane where the air outlet is located is a second plane, the first plane and the second plane intersect, and the first heat exchange part is located between the air outlet and the second heat exchange part.

[0023] The air conditioner further comprises an electric control box, which is arranged in the accommodating cavity and located on the side of the multi-fold heat exchanger away from the air outlet.

[0024] Optionally, in some embodiments of the present application, the air return inlet further comprises a fourth area located on the side of the second area away from the first area, and the fourth area is provided with a fourth grid rib.

[0025] The normal projection of the electric control box on the first plane is located in the fourth area, and the angle a6 between the fourth grid rib and the first plane satisfies: a6 > 90°.

[0026] Optionally, in some embodiments of the present application, the multi-fold heat exchanger further comprises a third heat exchange part connected to the second heat exchange part at a preset angle a7, wherein 90° < a7 < 180°.

[0027] Optionally, in some embodiments of the present application, the air conditioner is a lower air return type air conditioner, and the multi-fold heat exchanger is a U-shaped multi-fold heat exchanger.

[0028] In summary, due to the adoption of the above technical solutions, the present application at least has the following beneficial effects:

[0029] The air conditioner provided by the present application adjusts the angle between the first grid rib and the first plane and the angle between the second grid rib and the first plane, so that the angles of the grid rib and the corresponding heat exchange part are similar or the same, improving the adaptability of the grid rib and the heat exchange part, thereby reducing the contact angle between the airflow entering the air return inlet and the multi-fold heat exchanger, promoting the airflow to flow more smoothly along the surface of the multi-fold heat exchanger, shortening the flow distance of the airflow, reducing the turbulence of the flow field, and making the airflow movement more stable and orderly, reducing energy loss, and reducing the collision between the airflow and the heat exchange part to avoid noise; the speed distribution of the inlet airflow becomes more uniform when it enters the multi-fold heat exchanger under the guidance of the grid rib, and the uniform airflow speed distribution helps to improve the utilization rate of the heat exchange area of the multi-fold heat exchanger, so that more surfaces of the multi-fold heat exchanger can effectively participate in the heat exchange process; based on the above design, the air conditioner provided by the present application reduces energy consumption, improves energy use efficiency, and improves the heat exchange performance and efficiency of the multi-fold heat exchanger, providing users with a more efficient, energy-saving and comfortable use experience. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application and are not intended to limit this application, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of a top-return air conditioner in the prior art;

[0032] Figure 2 This is a schematic diagram of the structure of a bottom-return air conditioner in the prior art;

[0033] Figure 3 Velocity cloud map for numerical simulation of existing bottom return air air conditioners;

[0034] Figure 4 Turbulent kinetic energy cloud map for numerical simulation of existing bottom return air air conditioners;

[0035] Figure 5 This is a schematic diagram of the structure of the air conditioner provided in the embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of the multi-fold heat exchanger provided in the embodiments of this application;

[0037] Figure 7 This is a schematic diagram of the structure of the return air vent provided in an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the water receiving tray provided in the embodiments of this application;

[0039] Figure 9 The velocity cloud map is a numerical simulation of the air conditioner provided in the embodiments of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100 - Air conditioner; 10 - Housing; 11 - Receiving cavity; 12 - Return air vent; 121 - First zone; 1211 - First grille rib; 122 - Second zone; 1221 - Second grille rib; 123 - Third zone; 1231 - Third grille rib; 124 - Fourth zone; 1241 - Fourth grille rib; 13 - Air outlet; 20 - Multi-fold heat exchanger; 21 - First heat exchange section; 22 - Second heat exchange section; 23 - Third heat exchange section; 30 - Water tray; 31 - Bottom wall; 32 - First side wall; 33 - Second side wall; 40 - Electrical control box; 50 - Cross-flow fan. Detailed Implementation

[0042] With reference to the drawings and the examples described herein, it will be understood that the examples are intended to be illustrative only and are not intended to limit the scope of the application. With the benefit of this disclosure any number of further examples falling within the scope of the application will be apparent to those skilled in the art to which the examples relate.

[0043] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like refer to the orientation or positional relationship shown in the drawings, and are merely used for convenience and simplification of the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" are used only for the purpose of description, and cannot be construed as indicating or implying relative importance or indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0044] In the present application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as exemplary in the present application is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, for purposes of explanation, specific details are set forth. It will be apparent to those skilled in the art that the present application can be practiced without the specific details presented. In other instances, well-known structures and processes are not described in detail in order to avoid obscuring the description of the present application. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features presented herein.

[0045] In order to facilitate the understanding of the scheme of the present application, the spline curves and arrows used in the reference signs in the drawings are described as follows: the components indicated by the spline curves without arrows are solid components, i.e. components with solid structures; the components indicated by the spline curves with arrows are virtual components, i.e. components without solid structures.

[0046] Air conditioners can be generally divided into upper return air type air conditioners and lower return air type air conditioners according to the position of the return air inlet. As shown in Figure 1 As shown in FIG. 1, in the upper return air type air conditioner, the upper return air type return air inlet is located above the upper return air type air conditioner, the upper return air type heat exchanger is in the shape of an inverted U, and the upper return air type water pan is connected to the upper return air type heat exchanger structure close to the left side of the upper return air type air outlet. As shown inFigure 2 As shown, in order to be aimed at special scenarios, such as computer room precision air conditioner, kitchen air conditioner and the like, because there is a limited area of the top return air inlet, therefore, the layout of the lower return air type heat exchanger and the air duct system is adjusted, so that the lower return air type return air inlet is located below the lower return air type air conditioner, the lower return air type heat exchanger is arranged in a U shape, and the lower return air type water pan and the lower return air type return air inlet are located directly below the lower return air type heat exchanger.

[0047] In the existing lower return air type air conditioner, the air inlet grille assembly at the lower return air type return air inlet is usually arranged vertically with the lower return air type return air inlet, and the arrangement angle of the air inlet grille assembly with the lower return air type heat exchanger and the lower return air type water pan structure direction is different, so that the air return flow resistance is increased, which leads to the increase of the internal flow field resistance and the turbulence degree, and the uniformity of the return air flow is affected, the heat exchange efficiency is reduced, noise is generated, the sound quality is reduced, and the user has a bad experience. For details, please refer to Figure 3 and Figure 4 From the velocity cloud map and the turbulent kinetic energy cloud map of the existing lower return air type air conditioner, it can be seen that there is a certain difference in the velocity distribution on the left and right sides of the lower return air type return air inlet, which is caused by the different heat exchange areas on the left and right sides of the lower return air type heat exchanger. The air inlet velocity and the turbulence degree on the right side are greater than those on the left side, which easily causes the uneven distribution of the internal flow field velocity, and the uniformity of the velocity distribution on the left and right sides of the lower return air type heat exchanger is poor. The overall layout direction of the lower return air type heat exchanger and the lower return air type water pan structure is inconsistent, which reduces the air inlet efficiency, increases the turbulent kinetic energy of the internal flow field, and makes the heat exchange performance of the lower return air type heat exchanger uneven.

[0048] It should be noted that in the present application, the position relationship indicated by "upper", "lower" and the like is based on the position relationship in the use and operation process of the air conditioner 100.

[0049] Please refer to Figure 5 , Figure 6 and Figure 7 , the present application provides an air conditioner 100, which comprises a shell 10 and a multi-fold heat exchanger 20.

[0050] The shell 10 defines a containing cavity 11, and the shell 10 is provided with a return air inlet 12, the plane where the return air inlet 12 is located is a first plane, and the return air inlet 12 comprises a first area 121 and a second area 122 arranged in sequence, the first area 121 is provided with a first grille rib 1211, and the second area 122 is provided with a second grille rib 1221.

[0051] The multi-fold heat exchanger 20 is arranged in the accommodating cavity 11, and the multi-fold heat exchanger 20 comprises a first heat exchange part 21 and a second heat exchange part 22 connected, the first heat exchange part 21 is located in the first area 121 in the orthographic projection on the first plane, and the included angle between the first heat exchange part 21 and the first plane is α1, and the second heat exchange part 22 is located in the second area 122 in the orthographic projection on the first plane, and the included angle between the second heat exchange part 22 and the first plane is α2.

[0052] The included angle α3 between the first grid rib 1211 and the first plane satisfies: 90°≤α3≤α1, and the included angle α4 between the second grid rib 1221 and the first plane satisfies: α2≤α4≤90°.

[0053] It should be noted that in the present application, the included angles between any component (heat exchange part, grid assembly, etc.) and the first plane are all along the same side (such as all left or all right), and in the present application, the included angle between the side of the component away from the air outlet 13 of the air conditioner 100 and the first plane.

[0054] It should be further explained that in the present application, the included angles between the grid ribs such as the first grid rib 1211, the second grid rib 1221, and the subsequent third grid rib 1231 and the fourth grid rib 1241 and the first plane are all the included angles between the extension directions of the grid ribs and the first plane.

[0055] It should be further explained that the included angle α3 between at least one first grid rib 1211 and the first plane satisfies: 90°<α3≤α1. Correspondingly, the included angle α4 between at least one second grid rib 1221 and the first plane satisfies: α2≤α4<90°.

[0056] The air conditioner 100 provided in the present application adjusts the included angles between the first grid rib 1211 and the first plane and the included angles between the second grid rib 1221 and the first plane, so that the angles between the grid ribs and the corresponding heat exchange parts are similar or the same, thereby improving the adaptability of the grid ribs and the heat exchange parts, reducing the contact angle between the airflow entering the air return inlet 12 and the multi-fold heat exchanger 20, and promoting the airflow to flow more smoothly along the surface of the multi-fold heat exchanger 20, shortening the flow distance of the airflow, reducing the turbulence degree of the flow field, and reducing the energy loss and the collision between the airflow and the heat exchange part, thereby avoiding noise. The speed distribution of the inlet airflow becomes more uniform when the inlet airflow enters the multi-fold heat exchanger 20 under the guidance of the grid rib, and the uniform airflow speed distribution helps to improve the utilization rate of the heat exchange area of the multi-fold heat exchanger 20, so that more surfaces of the multi-fold heat exchanger 20 can effectively participate in the heat exchange process. Based on the above design, the air conditioner 100 provided in the present application reduces energy consumption, improves energy use efficiency, and improves the heat exchange performance and efficiency of the multi-fold heat exchanger 20, thereby providing users with a more efficient, energy-saving and comfortable use experience.

[0057] In some embodiments of the present application, 90° < α1 < 180°, 0° < α2 < 90°. It can be understood that (α1-α2) is the preset included angle of the connection between the first heat exchange part 21 and the second heat exchange part 22, and (α1-α2) satisfies: 0 < (α1-α2) < 90°, which can ensure the heat exchange area of the multi-fold heat exchanger 20 and can also save the space in the containing cavity 11.

[0058] In some embodiments of the present application, the first area 121 is provided with a plurality of first grid ribs 1211. It can be understood that the air flow enters the containing cavity 11 from the area between adjacent first grid ribs 1211. The plurality of first grid ribs 1211 can effectively guide the air flow entering from the return air inlet 12, ensure that the air flow can be uniformly distributed to each part of the first heat exchange part 21, so that the air flow can form a flow pattern more conducive to heat exchange when passing through the first heat exchange part 21, and the plurality of first grid ribs 1211 can also enhance the structural strength of the first area 121 of the return air inlet 12, prevent deformation or damage caused by air flow impact or other external factors.

[0059] In some embodiments of the present application, the included angle between the plurality of first grid ribs 1211 and the first plane is α3, and α3 = α1. In other words, all the first grid ribs 1211 are arranged in parallel with the first heat exchange part 21, which can effectively reduce the contact angle of the air flow entering from the first area 121 with the first heat exchange part 21.

[0060] In some other embodiments of the present application, the included angle between the plurality of first grid ribs 1211 and the first plane shows a gradient increasing trend from the direction far away from the second grid rib 1221 to the direction close to the second grid rib 1221, the included angle α3' between the first grid rib 1211 farthest away from the second grid rib 1221 and the first plane is 90°, and the included angle α3" between the first grid rib 1211 closest to the second grid rib 1221 and the first plane is α1. It should be noted that the distance between the plurality of first grid ribs 1211 and the first heat exchange part 21 shows a decreasing trend from the direction far away from the second grid rib 1221 to the direction close to the second grid rib 1221, so the first grid rib 1211 farthest away from the second grid rib 1221 is farthest away from the first heat exchange part 21, and at this time α3' = 90°, the air flow entering this area can flow vertically upward to contact the first heat exchange part 21 for sufficient heat exchange, avoiding the air flow entering to flow obliquely upward to the side edge of the first heat exchange part 21 and difficult to contact for heat exchange, and the first grid rib 1211 closest to the second grid rib 1221 is closest to the first heat exchange part 21, and at this time α3" = α1, the first grid rib 1211 is arranged in parallel with the first heat exchange part 21, which is conducive to increasing the contact area of the air flow entering this area with the first heat exchange part 21 for efficient heat exchange.

[0061] Further, the angle between any adjacent first grid bars 1211 and the first plane is greater than or equal to 3°. In this way, interference of air flows entering from adjacent air inlet areas can be avoided, air flow complexity is reduced, and noise generated by air flow mutual impact is reduced.

[0062] It should be noted that the first grid bars 1211 can also be arranged in other angles, and the angle between any first grid bar 1211 and the first plane satisfies α3: 90°≤α3≤α1, and the angle between at least one first grid bar 1211 and the first plane satisfies 90°<α3≤α1.

[0063] In some embodiments of the present application, the second area 122 is provided with a plurality of second grid bars 1221. It can be understood that the air flow enters the containing cavity 11 from the area between adjacent second grid bars 1221. Accordingly, the plurality of second grid bars 1221 can effectively guide the air flow entering from the return air outlet 12, ensure that the air flow can be uniformly distributed to each part of the second heat exchange part 22, so that the air flow can form a flow pattern more conducive to heat exchange when passing through the second heat exchange part 22, and the plurality of second grid bars 1221 can also enhance the structural strength of the second area 122 of the return air outlet 12, prevent deformation or damage caused by air flow impact or other external factors.

[0064] In some embodiments of the present application, the angle between the plurality of second grid bars 1221 and the first plane is α4, and α4=α2.

[0065] In some embodiments of the present application, the angle between the first plane and the plurality of second grid bars 1221 decreases from the direction far away from the first grid bar 1211 to the direction close to the first grid bar 1211. The angle between the first plane and the second grid bar 1221 farthest from the first grid bar 1211 is α4’ = 90°, and the angle between the first plane and the second grid bar 1221 closest to the first grid bar 1211 is α4” = α2. It should be noted that the distance between the plurality of second grid bars 1221 and the second heat exchange part 22 decreases from the direction far away from the first grid bar 1211 to the direction close to the first grid bar 1211. Therefore, the second grid bar 1221 farthest from the first grid bar 1211 is farthest from the second heat exchange part 22, and the angle between the first plane and the second grid bar 1221 is α4’ = 90°. The air flow in this area can flow vertically upward to contact the second heat exchange part 22 for sufficient heat exchange, avoiding the air flow in this area flowing obliquely upward to the side of the second heat exchange part 22 and being difficult to contact the second heat exchange part 22 for heat exchange. The second grid bar 1221 closest to the first grid bar 1211 is closest to the second heat exchange part 22, and the angle between the first plane and the second grid bar 1221 is α4” = α2. The second grid bar 1221 is parallel to the second heat exchange part 22, which is beneficial to increase the contact area between the air flow in this area and the second heat exchange part 22 for efficient heat exchange.

[0066] Further, the angle between the first plane and any adjacent second grid bar 1221 is greater than or equal to 3°. In this way, interference between the air flows in adjacent air inlet areas can be avoided, air flow complexity is reduced, and noise generated by air flow collision is reduced.

[0067] It should be noted that the plurality of second grid bars 1221 can also be arranged in other angles. The angle between any second grid bar 1221 and the first plane satisfies α4 satisfies: α2 ≤ α4 < 90°, and the angle between at least one second grid bar 1221 and the first plane satisfies α4 satisfies: α2 ≤ α4 < 90°.

[0068] In some embodiments of the present application, please refer to Figure 8 The air conditioner 100 further comprises a water pan 30 arranged directly below the multi-fold heat exchanger 20 and between the multi-fold heat exchanger 20 and the return air inlet 12. It can be understood that the multi-fold heat exchanger 20 generates condensate water during operation. The water pan 30 can collect and discharge the condensate water generated by the multi-fold heat exchanger 20, avoiding the condensate water from dripping along the return air inlet 12 and affecting user experience.

[0069] Specifically, the water pan 30 comprises a bottom wall 31 and a side wall extending from the bottom wall 31 in a direction close to the multi-fold heat exchanger 20, the side wall comprises a first side wall 32 arranged in parallel with the first heat exchange part 21 and a second side wall 33 arranged in parallel with the second heat exchange part 22, and the bottom wall 31 is located directly below the joint of the first heat exchange part 21 and the second heat exchange part 22. The structure of the water pan 30 is highly adaptable to the multi-fold heat exchanger 20, and can avoid the problems of condensation and water leakage of the multi-fold heat exchanger 20.

[0070] In some embodiments of the present application, the return air inlet 12 further comprises a third area 123 located between the first area 121 and the second area 122, and the third area 123 is provided with a third grid rib 1231.

[0071] In some embodiments of the present application, the return air inlet 12 further comprises a third area 123 located between the first area 121 and the second area 122, and the third area 123 is provided with a third grid rib 1231.

[0072] Further, the bottom wall 31 is parallel to the first plane, and the orthographic projection of the bottom wall 31 on the first plane is located in the third area 123, and the included angle a5 between the third grid rib 1231 and the first plane satisfies: a5=90°. In other words, the third grid rib 1231 is arranged perpendicularly to the third area 123. The arrangement of the third grid rib 1231 can reduce the flow channel loss and performance decay caused by the air flow and the water pan 30, and the air flow entering the third area 123 is perpendicular to the multi-fold heat exchanger 20, so that the flow distance is the shortest and the air intake is increased.

[0073] In some embodiments of the present application, the shell 10 is further provided with an air outlet 13, and the plane where the air outlet 13 is located is a second plane, the first plane and the second plane intersect, and the first heat exchange part 21 is located between the air outlet 13 and the second heat exchange part 22. Further, the first plane and the second plane are perpendicular. For example, the return air inlet 12 can be arranged at the bottom of the shell 10, and the air outlet 13 can be arranged at the side of the shell 10.

[0074] In some embodiments of the present application, the air conditioner 100 further comprises an electric control box 40, and the electric control box 40 is arranged in the accommodating cavity 11 and located on the side of the multi-fold heat exchanger 20 away from the air outlet 13. The electric control box 40 can be responsible for distributing electric energy to various functional components of the air conditioner 100, such as the compressor, the fan, the four-way valve, etc., so as to realize the normal operation of the air conditioner 100.

[0075] In some embodiments of the present application, the return air inlet 12 further comprises a fourth area 124 located on the side of the second area 122 away from the first area 121, and the fourth area 124 is provided with a fourth grid strip 1241. The orthographic projection of the electric control box 40 on the first plane is located in the fourth area 124, and the angle a6 between the fourth grid strip 1241 and the first plane satisfies: a6>90°. Since the electric control box 40 is installed close to the position of the fourth area 124, the fourth grid strip 1241 is inclined to be arranged on the side away from the electric control box 40, so as to reduce the influence of the structure of the electric control box 40 on the air flow entering the fourth area 124, and make the air flow flow to the second heat exchange part 22 as much as possible, thereby improving the heat exchange efficiency.

[0076] In a specific embodiment, the return air inlet 12 comprises the first area 121, the third area 123, the second area 122 and the fourth area 124 arranged in sequence from the side close to the air outlet 13 to the side away from the air outlet 13.

[0077] In some embodiments of the present application, the multi-fold heat exchanger 20 further comprises a third heat exchange part 23 connected to the second heat exchange part 22 at a preset angle a7, wherein 90°<a7<180°. It can be understood that, since the preset angle (a1-a2) between the first heat exchange part 21 and the second heat exchange part 22 satisfies: 0<(a1-a2)<90°, in the vertical direction, the third heat exchange part 23 extends away from the return air inlet 12, and in the vertical direction, the third heat exchange part 23 is closer to the air outlet 13 than the first heat exchange part 21 and the second heat exchange part 22. The arrangement of the third heat exchange part 23 can effectively utilize the space in the containing cavity 11 and increase the heat exchange area, so as to ensure that the air flow entering from the return air inlet 12 contacts the surface of the multi-fold heat exchanger 20 as much as possible for effective heat exchange. For example, the air flow entering the fourth area 124 can be guided by the fourth grid strip 1241, flow upwards to the surface of the third heat exchange part 23 after bypassing the electric control box 40, and contact heat exchange.

[0078] In some embodiments of the present application, the air conditioner 100 is a down return type air conditioner 100, and the multi-fold heat exchanger 20 is a U-shaped multi-fold heat exchanger 20.

[0079] In some embodiments of the present application, the air conditioner 100 further comprises a cross-flow fan 50 arranged in the containing cavity 11 and located on the side of the multi-fold heat exchanger 20 away from the return air inlet 12 and close to the air outlet 13. During the operation of the air conditioner 100, the cross-flow fan 50 operates at a high speed, and air is sucked into the containing cavity 11 from the return air inlet 12 by negative pressure. After the air flow in the containing cavity 11 fully contacts and exchanges heat with the multi-fold evaporator, the air flow is blown out from the air outlet 13.

[0080] Please refer to Figure 9The air conditioner 100 provided by the scheme has no obvious difference in air flow speed of each air inlet area, the speed distribution is uniform, the heat exchange performance of the multi-fold heat exchanger 20 can be effectively improved, meanwhile, the third heat exchange part 23 is far away from the return air outlet 12, the air volume flowing through the third heat exchange part 23 is small, the angles of the second grid rib 1221 and the fourth grid rib 1241 are adjusted, the air inlet flow forms a tapered shape, the air inlet flow speed of the fourth area 124 is improved, the heat exchange performance of the multi-fold heat exchanger 20 is enhanced, after the angles of the grid ribs of each area at the return air outlet 12 are adjusted, the multi-fold heat exchanger 20 and the water pan 30 have higher adaptability, the overall distribution of the air flow field is more reasonable and uniform, the air volume and uniformity of the multi-fold heat exchanger 20 are improved, and the air volume can be increased by about 15% under the same rotating speed.

[0081] The application will be specifically described below through specific examples, and the following examples are only part of the examples of the application, and are not a limitation on the application.

[0082] Example 1

[0083] The embodiment provides an air conditioner, which comprises a shell, a containing cavity is defined in the shell, the shell is provided with a return air outlet and an air outlet, a plane where the return air outlet is located is a first plane, a plane where the air outlet is located is a second plane, and the first plane and the second plane intersect. The return air outlet comprises a first area, a third area, a second area and a fourth area which are sequentially arranged, the first area is provided with a first grid rib, the third area is provided with a third grid rib, the second area is provided with a second grid rib, and the fourth area is provided with a fourth grid rib.

[0084] The air conditioner further comprises a multi-fold heat exchanger which is arranged in the containing cavity, the multi-fold heat exchanger comprises a first heat exchange part, a second heat exchange part and a third heat exchange part which are connected, a normal projection of the first heat exchange part on the first plane is located in the first area, and an included angle α1 between the first heat exchange part and the first plane is 149°, a normal projection of the second heat exchange part on the first plane is located in the second area, and an included angle α2 between the second heat exchange part and the first plane is 47°, and an included angle α7 between the second heat exchange part and the third heat exchange part is 128°.

[0085] The air conditioner further comprises a water pan which is located between the multi-fold heat exchanger and the return air outlet; the water pan comprises a bottom wall which is located directly below a connection position of the first heat exchange part and the second heat exchange part, the bottom wall is parallel to the first plane, and a normal projection of the bottom wall on the first plane is located in the third area.

[0086] The air conditioner further comprises an electric control box which is arranged in the containing cavity and located on a side of the multi-fold heat exchanger away from the air outlet, a normal projection of the electric control box on the first plane is located in the fourth area.

[0087] The first grid rib and the first plane form an angle a3=a1=149°; the third grid rib and the first plane form an angle a5=90°; the second grid rib and the first plane form an angle a4=a2=47°; the fourth grid rib has three, and the angle a6 between the fourth grid rib and the first plane is 144°, 156° and 158° in turn from the direction close to the second grid rib to the direction far from the second grid rib.

[0088] Example 2

[0089] The example is basically the same as example 1, and the difference is that in the example, the angle a3' between the first grid rib farthest from the second grid rib and the first plane is 90°, and the angle between the first grid rib and the first plane increases by 3° in turn from the direction close to the second grid rib to the direction closest to the first grid rib, until the angle a3"=a1 between the first grid rib closest to the first grid rib and the first plane, wherein the angle difference between the first grid rib closest to the first grid rib and the other first grid rib closest to it is 5°.

[0090] Example 3

[0091] The example is basically the same as example 1, and the difference is that in the example, the angle a4' between the second grid rib farthest from the first grid rib and the first plane is 90°, and the angle between the second grid rib and the first plane increases by 3° in turn from the direction close to the first grid rib to the direction closest to the second grid rib, until the angle a4"=a2 between the second grid rib closest to the first grid rib and the first plane, wherein the angle difference between the second grid rib closest to the first grid rib and the other second grid rib closest to it is 4°.

[0092] Example 4

[0093] The example is basically the same as example 2, and the difference is that in the example, the angle a4' between the second grid rib farthest from the first grid rib and the first plane is 90°, and the angle between the second grid rib and the first plane increases by 3° in turn from the direction close to the first grid rib to the direction closest to the second grid rib, until the angle a4"=a2 between the second grid rib closest to the first grid rib and the first plane, wherein the angle difference between the second grid rib closest to the first grid rib and the other second grid rib closest to it is 4°.

[0094] Example 5

[0095] The example is basically the same as example 1, and the difference is that in the example, the angle a6 between all the fourth grid ribs and the first plane is 90°.

[0096] Comparative Example 1

[0097] This comparative example is basically the same as Example 1, except that the angles between the first, third, second, and fourth grid ribs and the first plane are all 90° in this comparative example. Figure 2 As shown.

[0098] The air volume, power and noise of the air conditioners in Examples 1 to 5 and Comparative Example 1 were tested at different speeds (1100 rpm, 950 rpm and 800 rpm), and the results are shown in Table 1.

[0099] Table 1

[0100]

[0101]

[0102] As shown in Table 1, at the same rotation speed, the air conditioners provided in Examples 1 to 5 generate a larger air volume, consume less power, and have lower noise compared to Comparative Example 1. This is because by reasonably adjusting the extension direction of the grille ribs and adapting them to the heat exchange section of the multi-fold heat exchanger, the contact angle between the airflow entering from the return air inlet and the multi-fold heat exchanger is reduced, which allows the airflow to flow more smoothly along the surface of the multi-fold heat exchanger, shortens the airflow distance, and reduces the turbulence of the flow field. The reduction in turbulence makes the airflow movement more stable and orderly, reduces energy loss, and avoids abnormal airflow and noise, which can significantly improve the user experience.

[0103] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0104] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: a shell defining a receiving cavity, the shell being provided with a return air inlet, a plane where the return air inlet is located being a first plane, the return air inlet comprising a first area and a second area arranged in sequence, the first area being provided with a first grating rib, and the second area being provided with a second grating rib; and a multi-fold heat exchanger arranged in the receiving cavity, the multi-fold heat exchanger comprising a first heat exchange part and a second heat exchange part connected to each other, a normal projection of the first heat exchange part on the first plane being located in the first area, and an angle between the first heat exchange part and the first plane being α1, a normal projection of the second heat exchange part on the first plane being located in the second area, and an angle between the second heat exchange part and the first plane being α2; wherein an angle α3 between the first grating rib and the first plane satisfies 90°≤α3≤α1, and an angle α4 between the second grating rib and the first plane satisfies α2≤α4≤90°.

2. The air conditioner of claim 1, wherein 90°＜α1＜180°，0°＜α2＜90°，0＜(α1-α2)＜90°。 3. The air conditioner of claim 1, wherein The first area is provided with a plurality of first grating ribs, wherein angles between the plurality of first grating ribs and the first plane are all α3, and α3=α1; or angles between the plurality of first grating ribs and the first plane present a gradient increasing trend from a direction far away from the second grating rib to a direction close to the second grating rib, an angle α3' between the first grating rib farthest away from the second grating rib and the first plane is 90°, an angle α3" between the first grating rib closest to the second grating rib and the first plane is α1, and an angle difference between any adjacent first grating ribs and the first plane is greater than or equal to 3°.

4. The air conditioner of claim 1, wherein The second area is provided with a plurality of second grating ribs, wherein angles between the plurality of second grating ribs and the first plane are all α4, and α4=α2; or angles between the plurality of second grating ribs and the first plane present a gradient decreasing trend from a direction far away from the first grating rib to a direction close to the first grating rib, an angle α4' between the second grating rib farthest away from the first grating rib and the first plane is 90°, an angle α4" between the second grating rib closest to the first grating rib and the first plane is α2, and an angle difference between any adjacent second grating ribs and the first plane is greater than or equal to 3°.

5. The air conditioner of claim 1, wherein The air conditioner further comprises a water pan, the water pan being arranged directly below the multi-fold heat exchanger and between the multi-fold heat exchanger and the return air inlet; the water pan comprises a bottom wall and a side wall extending from the bottom wall in a direction close to the multi-fold heat exchanger, the side wall comprises a first side wall arranged in parallel with the first heat exchange part and a second side wall arranged in parallel with the second heat exchange part, and the bottom wall is located directly below a connection position of the first heat exchange part and the second heat exchange part.

6. The air conditioner of claim 5, wherein The return air inlet further comprises a third area between the first area and the second area, the third area being provided with a third grating rib. The first side wall is projected on the first plane to be located in the first area, the second side wall is projected on the first plane to be located in the second area, the bottom wall is parallel to the first plane and is projected on the first plane to be located in the third area, and the third grid rib has an angle a5 with the first plane, and a5=90°.

7. The air conditioner of claim 1, wherein The shell is further provided with an air outlet, the air outlet is located on a second plane, the first plane and the second plane intersect, and the first heat exchange part is located between the air outlet and the second heat exchange part. The air conditioner further comprises an electric control box, the electric control box is arranged in the accommodating cavity and is located on the side of the multi-fold heat exchanger away from the air outlet.

8. The air conditioner of claim 7, wherein The air return port further comprises a fourth area located on the side of the second area away from the first area, and the fourth area is provided with a fourth grid rib. The electric control box is projected on the first plane to be located in the fourth area, and the fourth grid rib has an angle a6 with the first plane, and a6>90°.

9. The air conditioner of claim 1, wherein The multi-fold heat exchanger further comprises a third heat exchange part connected to the second heat exchange part at a preset angle a7, and 90°<a7<180°.

10. The air conditioner of claim 1, wherein The air conditioner is a lower air return type air conditioner, and the multi-fold heat exchanger is a U-shaped multi-fold heat exchanger.

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