Air conditioner indoor unit and seat hanging type air conditioner

Abstract

The indoor unit of the air conditioner comprises a shell, a first air inlet, a second air inlet, a first air outlet and a second air outlet, and the shell is provided with a containing cavity and a first air return opening; the heat exchanger is arranged in the accommodating cavity; the middle partition plate is arranged in the containing cavity, the middle partition plate comprises a connecting part and a mounting part, and the connecting part is connected to the shell and located at the edge of the first air return opening; the fan is arranged in the accommodating cavity, the fan is connected to the mounting part, and the fan comprises a wind wheel; at least part of the first air return opening is located on one side of the fan in the first direction, the projection of the installation part in the first direction falls into an area formed by the projection of the first air return opening in the first direction, the heat exchanger, the middle partition plate and the fan are arranged in the second direction, the second direction is roughly perpendicular to the first direction, and the middle partition plate is located between the heat exchanger and the wind wheel. The mounting part is positioned on one side of the connecting part away from the heat exchanger. By increasing the distance between the fan and the heat exchanger, the resistance of a wind field is reduced, the noise is reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of air conditioners, in particular to an air conditioner indoor unit and a ceiling-mounted air conditioner. Background Art

[0002] In the related art, an air conditioner generally includes a fan and a heat exchanger. The fan can suck in airflow and transport the airflow to the heat exchanger for heat exchange, thereby transferring and utilizing energy.

[0003] However, the distance between the fan and the heat exchanger in the related technology is small, so that the high-speed wind field generated by the fan will collide with the wind field that changes direction after being affected by the resistance of the heat exchanger, thereby generating a huge force between the two wind fields, which will not only generate additional noise, but also reduce the air volume, thereby reducing the heat exchange efficiency of the heat exchanger. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an air conditioner indoor unit that reduces wind field resistance, reduces noise, and improves heat exchange efficiency by increasing the distance between the fan and the heat exchanger.

[0005] The present invention also provides a ceiling-mounted air conditioner having the above-mentioned air conditioner indoor unit.

[0006] 18. The heat dissipation controller of claim 17, wherein the heat dissipation controller is configured to control the heat dissipation in the heat dissipation controller to control the heat dissipation in the heat dissipation controller. The heat dissipation controller is configured to control the heat dissipation in the heat dissipation controller to control the heat dissipation in the heat dissipation controller.

[0007] According to an embodiment of the first aspect of the present invention, an air conditioner indoor unit has at least the following beneficial effects: First, because the mounting portion is located on the side of the connecting portion away from the heat exchanger, that is, the spacing between the mounting portion and the heat exchanger is greater than the spacing between the middle partition and the heat exchanger in the related art, when the fan draws air from the first return air inlet into the accommodating chamber and delivers the air to the heat exchanger, the impact between the high-speed wind field generated by the fan and the wind field that changes direction due to the resistance of the heat exchanger is reduced, thereby reducing the force between the two wind fields, reducing noise, increasing air volume, and thus improving heat exchange efficiency. Second, because the connecting portion is connected to the housing and located at the edge of the first return air inlet, the location of the connecting portion does not block the incoming air and does not reduce the return air area of ​​the first return air inlet. The projection of the mounting portion along the first direction falls within the area formed by the projection of the first return air inlet along the first direction, placing the fan closer to the center of the first return air inlet, resulting in more uniform air intake. Thus, the air conditioner indoor unit according to the first aspect of the present invention solves the problem of large wind field resistance, high noise, and low heat exchange efficiency caused by the small spacing between the fan and the heat exchanger.

[0008] According to some embodiments of the present invention, the shell includes a first chassis, and along the first direction, the first chassis and the first return air outlet are located on opposite sides of the fan, and along the direction from the first return air outlet to the first chassis, the distance between the heat exchanger and the fan in the second direction gradually increases.

[0009] According to some embodiments of the present invention, the fan includes a volute, the volute is provided with an air outlet frame, the mounting portion is provided with a through hole, the air outlet frame is passed through the through hole, and is fixedly connected to the mounting portion, the air outlet direction of the air outlet frame on the side close to the first chassis is a third direction, the third direction has an angle α with the plane where the first chassis is located, the heat exchanger has an angle γ with the plane where the first chassis is located, satisfying: 0°<α<45°, 45°≤α+γ<90°.

[0010] According to some embodiments of the present invention, the volute is provided with a first guide plate, and the first guide plate is used to guide part of the airflow on the side of the air outlet frame close to the first chassis to a side close to the first chassis.

[0011] According to some embodiments of the present invention, the guiding surface of the first guide plate for guiding the airflow is a curved surface.

[0012] According to some embodiments of the present invention, the volute is provided with a volute tongue, which is located on the side of the air outlet frame away from the first chassis, and the air outlet direction of the air outlet frame close to the volute tongue is a fourth direction. The fourth direction has an angle β with the plane where the first chassis is located, satisfying: α<β, 60°≤β+γ≤90°.

[0013] According to some embodiments of the present invention, the middle partition is provided with a second guide plate, and the second guide plate is used to guide at least part of the airflow on one side of the volute tongue to the heat exchanger.

[0014] According to some embodiments of the present invention, the air-conditioning indoor unit further includes a water receiving pan, which includes a first water receiving portion and a second water receiving portion, wherein the first water receiving portion is located on a side of the heat exchanger away from the first chassis, and the second water receiving portion is located on a side of the heat exchanger close to the middle partition.

[0015] According to some embodiments of the present invention, the second guide plate abuts against a side of the second water receiving portion close to the first bottom plate.

[0016] A ceiling-mounted air conditioner according to a second embodiment of the present invention includes the air conditioner indoor unit described in any one of the first embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall cross-sectional structure of the air-conditioning indoor unit in the embodiment of the first aspect of the present invention;

[0018] Figure 2 1 is a schematic diagram of the assembly relationship of the partition in the accommodating cavity in the embodiment of the first aspect of the present invention;

[0019] Figure 3 2 is a schematic structural diagram of a middle partition in the related art in an embodiment of the first aspect of the present invention;

[0020] Figure 4 2 is a schematic diagram of the positions of the angles α and γ in the embodiment of the first aspect of the present invention;

[0021] Figure 5 This is a partial structural diagram of the partition in the embodiment of the first aspect of the present invention;

[0022] Figure 6 2 is a schematic structural diagram of the third direction a and the fourth direction b in the embodiment of the first aspect of the present invention;

[0023] Figure 7 yes Figure 4 Enlarged view of part A;

[0024] Figure 8 It is a partial schematic diagram of the indoor unit of the air conditioner in the embodiment of the first aspect of the present invention when it is in a hoisting form;

[0025] Figure 9 is a schematic diagram of the overall cross-sectional structure of the air-conditioning indoor unit in the embodiment of the first aspect of the present invention;

[0026] Figure 10 1 is a schematic diagram of the flow of air in the first cavity of the embodiment of the first aspect of the present invention;

[0027] Figure 11 It is a schematic diagram of the overall structure of a ceiling-mounted air conditioner in an embodiment of the second aspect of the present invention.

[0028] Description of reference numerals:

[0029] 100. Air conditioner indoor unit;

[0030] 110, housing; 111, front panel; 1111, first return air vent; 112, first chassis; 113, second chassis; 1131, second return air vent; 114, first return air grille; 115, second return air grille; 116, housing;

[0031] 120, fan; 121, volute; 1211, air outlet frame; 1212, volute tongue; 122, wind wheel; 123, centrifugal fan; 1231, centrifugal wind wheel;

[0032] 130. Heat exchanger; 131. Evaporator;

[0033] 140, middle partition; 141, connecting portion; 142, mounting portion; 1421, through hole; 143, partition;

[0034] 150, accommodating chamber; 151, first chamber; 152, second chamber;

[0035] 160, first guide plate;

[0036] 170, second guide plate;

[0037] 180, water receiving tray; 181, first water receiving portion; 182, second water receiving portion;

[0038] 200. Air conditioner outdoor unit;

[0039] 300. Floor-mounted air conditioner. DETAILED DESCRIPTION

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] The following is combined with Figure 1-11 This application is described in further detail.

[0045] Reference Figure 1 and Figure 2 The embodiment of the present invention provides an air conditioner indoor unit 100, which includes a housing 110. The housing 110 is provided with a receiving cavity 150. The receiving cavity 150 is located inside the housing 110. The housing 110 includes a front panel 111. The front panel 111 is located in the first direction (i.e. Figure 1 and Figure 2 On one side (in the front-to-back direction), the front panel 111 is provided with a first air return vent 1111. The first air return vent 1111 is connected to the accommodating cavity 150 and is used to allow external airflow to enter the accommodating cavity 150. It should be noted that in some embodiments, the first air return vent 1111 has an edge with a flange structure facing the accommodating cavity 150, so that the direction from the edge of the first air return vent 1111 to the accommodating cavity 150 is not a right-angled abrupt structure, but a continuous and gradual structure. This makes the external airflow smoother when passing through the first air return vent 1111, thereby reducing the phenomenon of airflow separation.

[0046] It is understood that in some embodiments of the first aspect of this embodiment, reference Figure 1 and Figure 2 The air conditioner indoor unit 100 further includes a fan 120, a middle partition 140 and a heat exchanger 130, which are all arranged inside the accommodating cavity 150, and the fan 120, the middle partition 140 and the heat exchanger 130 are arranged along the second direction (i.e. Figure 1 and Figure 2 The fan 120 can absorb the airflow entering the first return air port 1111 and transport the airflow to the heat exchanger 130 for heat exchange, thereby transferring and utilizing energy. It should be noted that the first direction is perpendicular to the second direction. In this embodiment, refer to Figure 1The first return air port 1111 is located in front of the shell 110 , and the fan 120 , the middle partition 140 and the heat exchanger 130 are arranged from bottom to top relative to the shell 110 .

[0047] It is understood that in some embodiments of the first aspect of this embodiment, reference Figure 1 and Figure 2 The fan 120 includes a rotor 122, which is disposed within the accommodating chamber 150 and is capable of driving airflow within the accommodating chamber 150. A central partition 140 is located between the heat exchanger 130 and the fan 120, separating the air inlet area from the air outlet area. The central partition 140 divides the accommodating chamber 150 into a first chamber 151 and a second chamber 152. A first return air port 1111 communicates with the first chamber 151. The fan 120 is located within the first chamber 151, and the heat exchanger 130 is located within the second chamber 152.

[0048] Specifically, refer to Figure 1 and Figure 2 The middle partition 140 includes a connecting portion 141 and a mounting portion 142, which are arranged along a first direction. The connecting portion 141 is connected to the housing 110 and is located at the upper edge of the first return air outlet 1111. Since the front panel 111 and the middle partition 140 are fixed during accessory installation, the position of the connecting portion 141 is only limited by the position of the first return air outlet 1111. Therefore, the return air area of ​​the first return air outlet 1111 is not affected by the position of the middle partition 140.

[0049] It is understandable that, referring to Figure 1 and Figure 2 The mounting portion 142 is located on a side of the connecting portion 141 away from the heat exchanger 130, and the projection of the mounting portion 142 along the first direction falls within the area formed by the first return air port 1111. Figure 3In the related art, an air conditioner indoor unit includes a housing 116, a centrifugal fan 123, a partition 143, and an evaporator 131. The centrifugal fan 123, partition 143, and evaporator 131 are all disposed within the housing 116 and arranged vertically. The centrifugal fan 123 draws in air and delivers it to the evaporator 131 for heat exchange. The centrifugal fan 123 includes a centrifugal impeller 1231, which drives air flow within the housing 116. The partition 143 is located between the centrifugal impeller 1231 and the evaporator 131 and serves to separate the air inlet area from the air outlet area. The partition 143 is arranged horizontally relative to the outer casing 116, and the centrifugal fan 123 is fixed to the partition 143. At this time, the distance between the centrifugal fan 123 and the evaporator 131 is small, so that the high-speed wind field generated by the centrifugal fan 123 will collide with the wind field that changes direction after being affected by the resistance of the evaporator 131, thereby generating a huge force between the two wind fields, which will not only generate additional noise, but also reduce the air volume and heat exchange efficiency, and ultimately directly affect energy efficiency.

[0050] In this embodiment, referring to Figure 1 and Figure 2 First, the end of the mounting portion 142 close to the connecting portion 141 is bent downward, so that the position of the fan 120 fixed to the mounting portion 142 is further away from the heat exchanger 130 than the setting of the fan 120 in the related art, thereby increasing the distance between the fan 120 and the heat exchanger 130, and reducing the impact between the high-speed wind field generated by the fan 120 and the wind field that changes direction after being affected by the resistance of the heat exchanger 130, thereby reducing the force between the two wind fields, reducing noise, increasing air volume, and thus improving heat exchange efficiency; secondly, the position of the mounting portion 142 is away from the heat exchanger After the heat exchanger 130 is installed, the space of the first cavity 151 is reduced, but the return air area of ​​the first return air outlet 1111 will not be affected by the position of the mounting portion 142, so that the return air area of ​​the first return air outlet 1111 will not be reduced due to the reduction of the space of the first cavity 151. At the same time, the increase in the space of the second cavity 152 enables the high-speed wind field generated by the fan 120 to have a larger flow range in the second cavity 152, so as to reduce the flow rate of the airflow, thereby further reducing the impact on the wind field that changes direction after being affected by the resistance of the heat exchanger 130, thereby further reducing noise, increasing air volume, and improving heat exchange efficiency.

[0051] It is understood that in some embodiments of the first aspect of this embodiment, reference Figure 1 and Figure 2The fan 120 further includes a volute 121 and a motor. The volute 121 is fixedly disposed in the first chamber 151. The wind wheel 122 is disposed in the volute 121. The motor can drive the wind wheel 122 to rotate, so that the wind wheel 122 can drive the airflow in the first chamber 151. The airflow is collected by the volute 121 and transported to the heat exchanger 130 for heat exchange. Depending on different usage requirements, the fan 120 can also be equipped with a heating unit, etc., which is not limited here.

[0052] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 The housing 110 includes a first chassis 112. Along the first direction, the first chassis 112 and the first return air port 1111 are located on opposite sides of the fan 120. In this embodiment, referring to Figure 4 , the first chassis 112 is located at the rear of the shell 110. Along the direction from the first return air inlet 1111 to the first chassis 112, the minimum distance between the heat exchanger 130 and the fan 120 gradually increases, and the heat exchanger 130 and the plane where the first chassis 112 are located have an angle γ. Specifically, the heat exchanger 130 is arranged upwardly and tilted from the side away from the first chassis 112 to the side close to the first chassis 112, so that the minimum distance between the lower end of the heat exchanger 130 and the volute 121 is closer, and the minimum distance between the upper end of the heat exchanger 130 and the volute 121 is farther. When the volume of the shell 110 is constant, the tilted arrangement of the heat exchanger 130 makes the contact area between the surface of the heat exchanger 130 and the airflow larger, thereby making the heat exchange area larger, thereby improving the heat exchange efficiency of the airflow; at the same time, under the same heat exchange efficiency, the production cost and floor space of the shell 110 are saved.

[0053] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 and Figure 5 The volute 121 is provided with an air outlet frame 1211, and the mounting portion 142 is provided with a through hole 1421. The through hole 1421 connects the first chamber 151 with the second chamber 152. The air outlet frame 1211 is inserted into the through hole 1421 and is fixedly connected to the mounting portion 142. This allows the impeller 122 to drive the airflow within the first chamber 151. The airflow is collected by the volute 121 and flows from the air outlet frame 1211 to the second chamber 152, and then flows to the heat exchanger 130 for heat exchange. Thus, the middle partition 140 separates the air inlet area from the air outlet area, reducing the mutual interference between the wind fields of the first chamber 151 and the second chamber 152.

[0054] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 and Figure 6The air outlet direction of the air outlet frame 1211 on the side closest to the first chassis 112 is the third direction a. The third direction a forms an angle α with the plane of the chassis, where the angle α satisfies 0° < α < 45° and 45° ≤ α + γ < 90°. Specifically, because the heat exchanger 130 requires a larger heat exchange area, the length of the heat exchanger 130 along the first direction is longer than the length of the housing 110. As a result, the heat exchanger 130 is tilted relative to the housing 110, i.e., γ has a certain angle, such as 45 degrees. In the related art, the angle α is 0°. In this case, the airflow from the outlet 1211 along the third direction a is not evenly distributed on the heat exchanger 130. The airflow tends to converge at the angle between the heat exchanger 130 and the first chassis 112, resulting in high heat exchange efficiency in the area of ​​the heat exchanger 130 close to the first chassis 112 and low heat exchange efficiency in the area farther away from the first chassis 112. This ultimately causes uneven heat exchange in the heat exchanger 130. In the related art, the angle of γ is generally 30°≤γ≤45°, then the included angle α satisfies 0°<α<45°. When the angle of γ remains unchanged, the included angle α has a certain angle, such as 5°, 15°, 30°, etc. At this time, the angle of α+γ is closer to 90 degrees than in the related art, that is, the angle of the air flow blown out by the air outlet frame 1211 along the third direction a and the surface of the heat exchanger 130 is closer to vertical than in the related art, so that most of the air flow can be evenly diffused to both sides when it blows to the middle of the heat exchanger 130, so that the air flow is evenly distributed in the heat exchanger 130, thereby making the heat exchange of the heat exchanger 130 more uniform and improving the heat exchange efficiency.

[0055] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 and Figure 6 The volute 121 is provided with a first guide plate 160. The first guide plate 160 is provided on the side of the second chamber 152 close to the first chassis 112 and is located at the air outlet frame 1211. The first guide plate 160 is used to guide part of the airflow on the side of the air outlet frame 1211 close to the first chassis 112 to the side close to the first chassis 112. Specifically, when the airflow generated by the impeller 122 is guided to the air outlet frame 1211 by the volute 121, the airflow is difficult to directly reach the first chassis 112 because the third direction a forms an angle α with the plane where the first chassis 112 is located. Therefore, by providing the first guide plate 160, the length of the air outlet frame 1211 is extended, and the slope of the air outlet frame 1211 is reduced, so that the backflow in the second chamber 152 is weakened and the flow tends to be stable.

[0056] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 and Figure 6The guide surface of the first guide plate 160 for guiding the airflow is a curved surface. When the airflow generated by the wind wheel 122 is guided to the air outlet frame 1211 by the volute 121, most of the airflow is directly blown to the heat exchanger 130 along the third direction a. However, the airflow blown along the third direction a can usually only blow to the middle of the heat exchanger 130, and the heat exchange efficiency at both ends of the heat exchanger 130 is low. The curved surface of the first guide plate 160 allows part of the airflow on the side of the air outlet frame 1211 close to the first chassis 112 to be guided to the side close to the first chassis 112 through the Coanda effect, so that the airflow flows along the first chassis 112 to the side of the heat exchanger 130 away from the volute 121, thereby improving the heat exchange efficiency on the side of the heat exchanger 130 away from the volute 121, and further promoting the heat exchange of the heat exchanger 130 to achieve a uniform heat exchange effect. It should be noted that the Coanda effect refers to the fact that when a fluid encounters a curved surface during its flow, it will change its original flow direction and flow along the surface of the curvature. This effect is due to the friction generated by the contact between the fluid and the surface of the object, which leads to the viscosity of the fluid, causing the fluid to tend to flow along the protruding parts of the object's surface.

[0057] It is understandable that, referring to Figure 6 and Figure 7The volute 121 is provided with a volute tongue 1212, which is located on the side of the air outlet frame 1211 away from the chassis. The air outlet direction of the volute tongue 1212 is the fourth direction b, and the fourth direction b forms an angle β with the plane where the chassis is located. The angle β satisfies α<β, 60°≤β+γ<90°. Specifically, when β>α, the air outlet frame 1211 is in an outward expansion state, so that the airflow can diffuse in the second cavity 152 through the air outlet frame 1211, further promoting the uniform flow of air to the heat exchanger 130. At the same time, since the heat exchanger 130 needs to pursue a larger heat exchange area, the length of the heat exchanger 130 is longer than the length of the shell 110 along the first direction, so that the heat exchanger 130 is inclined relative to the shell 110, that is, γ has a certain angle, such as 45 degrees. In the related art, the angle β is 0°. At this time, the airflow blown out by the air outlet frame 1211 along the fourth direction b cannot be blown evenly onto the heat exchanger 130. The airflow is easily gathered at the angle between the heat exchanger 130 and the first chassis 112, so that the heat exchange efficiency of the area of ​​the heat exchanger 130 close to the first chassis 112 is high, while the heat exchange efficiency of the area far away from the first chassis 112 is low, which ultimately causes uneven heat exchange of the heat exchanger 130. In the related art, the angle of γ is generally 30°≤γ≤45°, then the angle β satisfies α<β. When the angle of γ remains unchanged, the angle β has a certain angle, such as 20°, 30°, 45°, etc. At this time, the angle of β+γ is closer to 90 degrees than in the related art, that is, the angle of the air flow blown out by the air outlet frame 1211 along the fourth direction b and the surface of the heat exchanger 130 is closer to vertical than in the related art, so that most of the air flow can be evenly diffused to both sides when it blows to the middle of the heat exchanger 130, so that the air flow is evenly distributed in the heat exchanger 130, thereby making the heat exchange of the heat exchanger 130 more uniform and improving the heat exchange efficiency.

[0058] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 6 and Figure 8 The air conditioning indoor unit 100 further includes a water receiving pan 180, which is disposed in the second cavity 152 and is located on the side of the second cavity 152 close to the front panel 111. The water receiving pan 180 is used to collect condensed water dripping from the heat exchanger 130. The water receiving pan 180 includes a first water receiving portion 181 and a second water receiving portion 182. The first water receiving portion 181 is located on the side of the heat exchanger 130 away from the first base plate 112, and the second water receiving portion 182 is located on the side of the heat exchanger 130 close to the middle partition 140. When the air conditioning indoor unit 100 is in a hoisting form, refer to Figure 8When the air conditioner indoor unit 100 is suspended, it is suspended on the ceiling through the first chassis 112. After the airflow passes through the heat exchanger 130 for heat exchange, the condensed water generated by the heat exchanger 130 flows into the water receiving tray 180 along the surface of the heat exchanger 130 due to gravity. At this time, the first water receiving portion 181 can store the condensed water. When the air conditioner indoor unit 100 is seated, refer to Figure 6 After the air flow passes through the heat exchanger 130 for heat exchange, the condensed water generated by the heat exchanger 130 will flow into the water receiving tray 180 along the surface of the heat exchanger 130 due to gravity. At this time, the second water receiving portion 182 can store the condensed water. By setting the first water receiving portion 181 and the second water receiving portion 182, the air-conditioning indoor unit 100 can receive water in both seat-mounted and suspended forms, thereby improving the versatility and compatibility of the water receiving tray 180.

[0059] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 6 and Figure 7 The middle partition 140 is provided with a second guide plate 170, which abuts against the side of the second water receiving portion 182 close to the first base plate 112. The second guide plate 170 is used to guide at least part of the airflow on one side of the volute tongue 1212 to the heat exchanger 130. Specifically, when the airflow generated by the wind wheel 122 is guided to the air outlet frame 1211 by the volute 121, due to the gap between the water receiving tray 180 and the middle partition 140, if the airflow enters the gap, turbulence and noise will be generated. By setting the second guide plate 170, one side of the second guide plate 170 abuts against the volute tongue 1212, and one side of the second guide plate 170 abuts against the side of the second water receiving part 182 close to the first chassis 112, so that the second guide plate 170 blocks the gap between the water receiving tray 180 and the middle partition 140, so that part of the airflow after passing through the volute tongue 1212 can be guided to the heat exchanger 130 for heat exchange, thereby improving the heat exchange efficiency of the heat exchanger 130.

[0060] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 and Figure 9The housing 110 further includes a second chassis 113, which is located on a side of the fan 120 away from the heat exchanger 130. The second chassis 113 is provided with a second return air port 1131, which communicates with the accommodating chamber 150 and is used to allow external airflow to enter the accommodating chamber 150. When both the first return air port 1111 and the second return air port 1131 are provided, the second return air port 1131 can increase the return air area, thereby facilitating air intake for the fan 120, improving the efficiency of airflow delivery by the fan 120, and thereby improving the heat exchange efficiency of the heat exchanger 130. It should be noted that in this embodiment, since the second chassis 113 is located below the housing 110, the air conditioner indoor unit 100 is also hung on the wall via a bracket when installed, rather than being placed directly on the ground. This ensures that the second chassis 113 is at a certain distance from the ground, allowing airflow to smoothly enter the first chamber 151 from the second return air port 1131.

[0061] It should be noted that, in some embodiments, the first return air outlet 1111 and the second return air outlet 1131 are integrated into one, so that the second return air outlet 1131 becomes a part of the first return air outlet 1111, so as to merge to form a larger first return air outlet 1111, that is, the first return air outlet 1111 extends from the front of the fan 120 to the bottom of the fan 120, thereby increasing the air inlet area of ​​the first return air outlet 1111.

[0062] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 4 and Figure 10 A first return air grille 114 is provided at the first return air inlet 1111. The first return air grille 114 divides the first return air inlet 1111 into a plurality of channels arranged in strips. It should be noted that the channels of the first return air grille 114 can also be arranged in a hole shape. The first return air grille 114 is used to reduce the entry of larger debris into the interior of the air-conditioning indoor unit 100 to protect the structural parts inside the air-conditioning indoor unit 100. At the same time, when the air-conditioning indoor unit 100 is in operation, it dissipates heat inside the shell 110 to ensure normal ventilation of the shell 110. It should be noted that in some embodiments, the first return air grille 114 has a flange structure facing the first cavity 151, so that the direction from the channel of the first return air grille 114 to the accommodating cavity 150 is not a right-angled abrupt structure, but a continuous and gradual structure, thereby making the external airflow smoother when passing through the channel of the first return air grille 114, reducing the phenomenon of airflow separation.

[0063] It is understood that in some embodiments of the first aspect of the present invention, reference Figure 9 and Figure 10A second return air grille 115 is provided at the second return air outlet 1131. The second return air grille 115 divides the second return air outlet 1131 into a plurality of channels arranged in strips. It should be noted that the channels of the second return air grille 115 can also be arranged in a hole shape. The second return air grille 115 is used to reduce the entry of larger debris into the interior of the air-conditioning indoor unit 100 to protect the structural parts inside the air-conditioning indoor unit 100. At the same time, when the air-conditioning indoor unit 100 is in operation, it dissipates heat inside the shell 110 to ensure normal ventilation of the shell 110. It should be noted that in some embodiments, the second return air grille 115 has a flange structure facing the first cavity 151, so that the direction from the channel of the second return air grille 115 to the accommodating cavity 150 is not a right-angled abrupt structure, but a continuous and gradual structure, thereby making the external airflow smoother when passing through the channel of the second return air grille 115, reducing the phenomenon of airflow separation.

[0064] It is understood that in some embodiments, reference Figure 9 and Figure 10 When the first return air grille 114 and the second return air grille 115 are both provided on the shell 110, since the second return air port 1131 and the first return air port 1111 are perpendicular to the shell 110, the airflow entering the first cavity 151 from the channel of the second return air grille 115 and the airflow entering the first cavity 151 from the channel of the first return air grille 114 can be subjected to a reaction force when they meet each other, thereby reducing the flow rate of the airflow in the first cavity 151, and further reducing the vibration caused by the friction between the airflow and the first return air grille 114 and the second return air grille 115, which helps to reduce the noise during operation of the air conditioner indoor unit 100.

[0065] The implementation principle of the embodiment of the first aspect of the present application is as follows: first, since the mounting portion 142 is located on the side of the connecting portion 141 away from the heat exchanger 130, that is, the distance between the mounting portion 142 and the heat exchanger 130 is larger than the distance between the partition 143 and the evaporator 131 in the related technology, when the fan 120 inhales the airflow from the first return air port 1111 into the first cavity 151 and transports the airflow to the heat exchanger 130, the impact between the high-speed wind field generated by the fan 120 and the wind field that changes direction after being affected by the resistance of the heat exchanger 130 is reduced, thereby reducing the force between the two wind fields, reducing noise, increasing air volume, and thus improving heat exchange efficiency, solving the problem of large wind field resistance, large noise, and low heat exchange efficiency caused by the small distance between the fan 120 and the heat exchanger 130.

[0066] Secondly, since the connecting portion 141 is connected to the shell 110 and is located at the upper edge of the first return air outlet 1111, the projection of the connecting portion 141 along the first direction is located outside the area formed by the projection of the first return air outlet 1111 along the first direction, that is, the connecting portion 141 does not block the incoming air, and the projection of the mounting portion 142 along the first direction is located in the area formed by the projection of the first return air outlet 1111 along the first direction, which enables the fan to receive the airflow flowing in from the first return air outlet 1111. Therefore, the position of the connecting portion 141 will not affect the return air area of ​​the first return air outlet 1111, and since the fan 120 is fixedly connected to the mounting portion 142, the change in the position of the mounting portion 142 will simultaneously prompt the fan 120 to change its position, which will not affect the fan 120 from sucking in the airflow from the first return air outlet 1111. At the same time, after the mounting portion 142 is away from the heat exchanger 130, the space of the second cavity 152 is increased, so that the high-speed wind field generated by the fan 120 can have a larger flow range in the second cavity 152, so as to reduce the flow rate of the airflow, thereby further reducing the impact on the wind field that changes direction after being affected by the resistance of the heat exchanger 130, thereby further reducing noise, increasing air volume, and improving heat exchange efficiency.

[0067] The embodiment of the second aspect of the present invention provides a ceiling-mounted air conditioner 300, referring to Figure 11 The ceiling-mounted air conditioner 300 includes the indoor air conditioner 100 of the embodiment of the first aspect described above. The ceiling-mounted air conditioner 300 may further include an outdoor air conditioner 200 and other components. The indoor air conditioner 100 is connected to the outdoor air conditioner 200, and the indoor air conditioner 100 and the outdoor air conditioner 200 together constitute the ceiling-mounted air conditioner 300. Due to the improvements to the indoor air conditioner 100 described above, the ceiling-mounted air conditioner 300 of this embodiment achieves the same technical effects as the indoor air conditioner 100 described above, and will not be further described here.

[0068] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An air conditioner indoor unit, characterized in that: include: A housing is provided with a receiving cavity and a first air return port, wherein the first air return port is connected to the receiving cavity; a heat exchanger, disposed in the accommodating cavity; a middle partition plate, disposed in the accommodating cavity, the middle partition plate comprising a connecting portion and a mounting portion, the connecting portion being connected to the shell and located at an edge of the first return air outlet; A fan is disposed in the accommodating cavity, the fan is connected to the mounting portion, and the fan includes a wind wheel; In which, at least part of the first return air outlet is located on one side of the first direction of the fan, the projection of the mounting portion along the first direction falls into the area formed by the projection of the first return air outlet along the first direction, the heat exchanger, the middle partition and the fan are arranged along the second direction, the second direction is roughly perpendicular to the first direction, the middle partition is located between the heat exchanger and the wind wheel, and the mounting portion is located on the side of the connecting portion away from the heat exchanger.

2. The air conditioner indoor unit according to claim 1, characterized in that: The shell includes a first chassis. Along the first direction, the first chassis and the first return air outlet are located on opposite sides of the fan. Along the direction from the first return air outlet to the first chassis, the distance between the heat exchanger and the fan in the second direction gradually increases.

3. The air conditioner indoor unit according to claim 2, characterized in that: The fan includes a volute, which is provided with an air outlet frame. The mounting portion is provided with a through hole. The air outlet frame is passed through the through hole and is fixedly connected to the mounting portion. The air outlet direction of the air outlet frame on the side close to the first chassis is a third direction. The third direction has an angle α with the plane where the first chassis is located. The heat exchanger has an angle γ with the plane where the first chassis is located, satisfying the following: 0°<α<45°, 45°≤α+γ<90°.

4. The air conditioner indoor unit according to claim 3, characterized in that: The volute is provided with a first guide plate, and the first guide plate is used to guide part of the airflow on the side of the air outlet frame close to the first chassis to the side close to the first chassis.

5. The air conditioner indoor unit according to claim 4, characterized in that: The guiding surface of the first guide plate for guiding the airflow is a curved surface.

6. The air conditioner indoor unit according to claim 3, characterized in that: The volute is provided with a volute tongue, which is located on the side of the air outlet frame away from the first chassis. The air outlet direction of the air outlet frame close to the volute tongue is a fourth direction. The fourth direction has an angle β with the plane where the first chassis is located, satisfying: α<β, 60°≤β+γ≤90°.

7. The air conditioner indoor unit according to claim 6, characterized in that: The middle partition is provided with a second guide plate, and the second guide plate is used to guide at least part of the airflow on one side of the volute tongue to the heat exchanger.

8. The air conditioner indoor unit according to claim 7, characterized in that: The air conditioner indoor unit also includes a water receiving pan, which includes a first water receiving portion and a second water receiving portion. The first water receiving portion is located on a side of the heat exchanger away from the first chassis, and the second water receiving portion is located on a side of the heat exchanger close to the middle partition.

9. The air conditioner indoor unit according to claim 8, characterized in that: The second guide plate abuts against a side of the second water receiving portion close to the first bottom plate.

10. Ceiling air conditioner, characterized in that: The air conditioner indoor unit comprises the air conditioner indoor unit according to any one of claims 1 to 9.

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