Indoor unit of air conditioner

Abstract

The utility model discloses an indoor unit of an air conditioner, which comprises a shell assembly, a fan assembly and a fan assembly, the fan is close to the air return opening and is arranged in the shell assembly; the heat exchanger is arranged in the shell, is mounted between the air outlet side of the fan and the air outlet, and is used for exchanging heat with airflow passing through the heat exchanger; the water pan is installed in the shell assembly and located below the heat exchanger, and the water pan comprises a drainage part located in an air inlet cavity in the air inlet side of the heat exchanger; the water collecting part is located in an air outlet cavity in the air outlet side of the heat exchanger, a flow channel is formed between the water collecting part and the water draining part, and the flow channel is configured to overcome pressure loss between an air inlet cavity and the air outlet cavity of the heat exchanger and press condensate water drained to the flow channel from the water collecting part to the water draining part. According to the utility model, air leakage is avoided while drainage is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an air-conditioner indoor unit. Background Art

[0002] Existing air conditioner indoor units are usually equipped with a heat exchanger and a water collection pan. When the air conditioner is in cooling mode, water vapor in the indoor air hits the low-temperature heat exchanger in the indoor unit, forming condensed water and flowing into the water collection pan.

[0003] The heat exchanger in the existing indoor unit is supported and fixed by the end plates on both sides. It can be arranged above the water receiving tray or placed in the water receiving tray. Good sealing and airflow guidance are required at the water receiving tray and end plate positions to maximize the airflow through the heat exchanger, utilize the heat exchange area of ​​the indoor heat exchanger, improve the heat exchange effect, and prevent airflow from leaking around the water receiving tray and end plates.

[0004] When the air flows through the indoor heat exchanger, condensed water is generated on it. The condensed water drips into the water collection tray and then needs to flow from the windward side of the heat exchanger to the drainage pump position. At this time, a small part of the air flow on the windward side of the heat exchanger will flow out through the drainage channel. This part of the air flow does not pass through the heat exchanger, affecting the performance of the heat exchanger. Utility Model Content

[0005] In response to the problems pointed out in the background technology, the present application provides an air-conditioning indoor unit. By setting a connecting drainage part and a water collection part in the water receiving tray, and utilizing the siphon principle, when there is a water column in the flow channel, the condensed water in the water receiving tray can be discharged to the drainage part while avoiding the air flow between the air inlet chamber and the air outlet chamber of the heat exchanger, thereby improving the performance of the heat exchanger.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0007] Some embodiments of the present application relate to an air conditioner indoor unit, comprising:

[0008] a housing assembly having an air outlet provided thereon;

[0009] a fan, which is arranged in the housing assembly near the return air outlet;

[0010] a heat exchanger disposed within the housing and installed between the air outlet side of the fan and the air outlet, for exchanging heat with the airflow passing therethrough;

[0011] A water receiving tray is installed in the housing assembly and is used to receive condensed water generated when the air flow passes through the heat exchanger during the cooling operation of the air conditioner indoor unit, and includes:

[0012] A drainage portion, located in the air inlet cavity on the air inlet side of the heat exchanger, for draining condensed water generated when the airflow on the air inlet side exchanges heat with the heat exchanger;

[0013] a water collecting portion, located in the air outlet cavity on the air outlet side of the heat exchanger, for collecting condensed water generated when the airflow on the air outlet side exchanges heat with the heat exchanger;

[0014] A flow channel is formed between the water collecting part and the drainage part, and the flow channel is configured to overcome the pressure loss between the air inlet chamber and the air outlet chamber of the heat exchanger, and press the condensed water discharged from the water collecting part to the flow channel down to the drainage part.

[0015] The advantages or beneficial effects of the above technical solution are: the water collecting pan is divided into a water collecting part and a drainage part, the drainage part is located on the air inlet side of the heat exchanger, and the water collecting part is located on the air outlet side of the heat exchanger. By configuring the structure of the flow channel, the pressure loss between the air inlet side and the air outlet side of the heat exchanger can be overcome, and the condensed water discharged from the water collecting part to the flow channel is pressed down to the drainage part. In this way, as long as the air-conditioning indoor unit is working, the pressure loss on the air inlet side and the air outlet side remains unchanged. That is, since the pressure loss between the air inlet side and the air outlet side can be overcome, once the condensed water is discharged into the flow channel and a water column is formed, it will be unidirectionally pressed downward and discharged to the drainage part, so that while draining water, the water column in the flow channel also plays a sealing role, avoiding the air flow on the air inlet side from flowing through the flow channel to the air outlet side without heat exchange, thereby improving the performance of the heat exchanger.

[0016] In some embodiments of the present application, the water collection portion includes a first water collection area, which is located at the air outlet side of the heat exchanger, and a first drainage portion is formed in the first water collection area; the drainage portion includes:

[0017] A second water collection area is located at the air inlet side of the heat exchanger, and a second drainage portion is formed in the second water collection area;

[0018] a drainage area located on one side of the heat exchanger and in communication with the second drainage portion;

[0019] The water receiving tray also includes:

[0020] a first protrusion located in the water receiving tray and extending perpendicularly to the air supply direction of the heat exchanger from the air inlet side to the air outlet side, the bottom of the heat exchanger abutting against the first protrusion, and the first water collection area and the second water collection area being respectively located on both sides of the first protrusion;

[0021] The second protrusion is arranged in the water receiving tray and connected to the first protrusion, and is used to separate the first water collection area and the drainage area. The flow channel connects the first drainage part and the drainage area and is arranged below the second protrusion.

[0022] The advantages or beneficial effects of the above technical solution are: according to the layout position of the heat exchanger, the drainage part is divided into a second water collection area and a drainage area. The second water collection area is located on the air inlet side of the heat exchanger, and the first water collection area is located on the air outlet side of the heat exchanger. In this way, it is convenient to collect water and discharge it to the drainage area together. It is convenient to arrange drainage components in the drainage area, and the drainage area is located on one side of the first water collection area, which is also convenient for arranging the flow channel.

[0023] In some embodiments of the present application, the flow channel includes:

[0024] a first flow channel, which is recessed at the end of the first drainage portion and extends to a position directly below the projection of the second protrusion toward the side of the first drainage portion, wherein the bottom wall of the first flow channel is horizontal;

[0025] a second flow channel, configured to connect the first flow channel and the drainage area, and passing through a bottom of the second protrusion; a bottom wall of the second flow channel being inclined upward from the first flow channel to the drainage area, and having an inclination consistent with that of the bottom of the second protrusion;

[0026] Among them, the water inlet height L1 of the end of the first drainage portion from the bottom wall of the first flow channel, the drainage height L2 of the second flow channel, and the depth L3 from the bottom wall of the first flow channel to the bottom end of the second protrusion are successively reduced, and (L1-L2)>△P / (ρ*g), where △P is the pressure loss between the air inlet side and the air outlet side of the heat exchanger, ρ is the water density, and g is the acceleration of gravity.

[0027] The advantages or beneficial effects of the above technical solution are: the flow channel is specifically provided to include a first flow channel and a second flow channel, and the height of each flow channel in the first flow channel and the second flow channel is arranged to form a liquid level height difference during drainage, and the siphon principle is used to achieve drainage while preventing airflow from passing through the flow channel from the air inlet side to the air outlet side.

[0028] Moreover, the inclination of the bottom wall of the second flow channel is consistent with the inclination of the bottom of the second protrusion, thereby ensuring that the water column in the first flow channel can be smoothly pressed into the drainage area along the inclined flow channel under the action of the liquid level height difference, thereby improving drainage efficiency.

[0029] In some embodiments of the present application, the flow channel includes:

[0030] a first flow channel, which is recessed at the end of the first drainage portion and extends to a position directly below the projection of the side of the second protrusion facing the drainage area, wherein the bottom wall of the first flow channel is horizontal and parallel to the bottom of the second protrusion;

[0031] a second flow channel, which is used to connect the first flow channel and the drainage area;

[0032] Among them, the water inlet height L1 of the end of the first drainage portion from the bottom wall of the first flow channel, the drainage height L2 of the second flow channel, and the depth L3 from the bottom wall of the first flow channel to the bottom end of the second protrusion decrease successively, and (L1-L2)>△P / (ρ*g), where △P is the pressure loss between the air inlet side and the air outlet side of the heat exchanger, ρ is the water density, and g is the acceleration of gravity.

[0033] The advantages or beneficial effects of the above technical solution are: the flow channel is specifically provided to include a first flow channel and a second flow channel, and the height of each flow channel in the first flow channel and the second flow channel is arranged to form a liquid level height difference during drainage, and the siphon principle is used to achieve drainage while preventing airflow from passing through the flow channel from the air inlet side to the air outlet side.

[0034] The structure of the second flow channel is arranged according to the shape of the bottom of the second protrusion, thereby adapting to the shape of the bottom of the second protrusion and improving the drainage efficiency.

[0035] In some embodiments of the present application, a bottom wall of the second flow channel is inclined upward from the first flow channel to the drainage area.

[0036] The advantages or beneficial effects of the above technical solution are: the bottom wall of the second flow channel is inclined upward from the first flow channel to the drainage area, reducing the resistance of water discharge to the drainage area and improving the efficiency of water discharge to the drainage area.

[0037] In some embodiments of the present application, the second water catchment area is provided with:

[0038] The guide portion is arranged in the second water collection area, and the guide portion is closer to the air outlet side of the fan relative to the second drainage portion. The height of the guide portion perpendicular to the air supply direction of the fan gradually decreases along the air supply direction toward the second drainage portion.

[0039] The advantages or beneficial effects of the above technical solution are: the provision of a guide portion can guide the airflow from the air outlet side of the fan, making the wind field distribution on the air inlet side surface of the heat exchanger more uniform, thereby improving the heat exchange efficiency between the heat exchanger and the airflow.

[0040] In some embodiments of the present application, the bottom wall of the first drainage portion is inclined toward the drainage area;

[0041] The bottom wall of the second drainage portion is also inclined toward the drainage area.

[0042] The advantages or beneficial effects of the above technical solution are: the first drainage part and the second drainage part arranged obliquely toward the drainage area can guide the rapid discharge of condensed water, avoid the accumulation of condensed water in their respective water collection areas, and thus improve the condensed water drainage efficiency.

[0043] In some embodiments of the present application, a plurality of reinforcing ribs are added to the outer side of the bottom of the water receiving tray, or

[0044] A plurality of reinforcing ribs are added to the outer side of the bottom of the water receiving tray, and vibration-damping materials are attached to the reinforcing ribs.

[0045] The advantages or beneficial effects of the above technical solution are: arranging reinforcing ribs to strengthen the overall strength of the water receiving tray and improve its service life; attaching vibration-damping materials (for example, vibration-damping felt, PU cotton, etc.) on the reinforcing ribs to prevent condensation around the water receiving tray and at the same time prevent the water receiving tray from expanding and generating vibration noise between the lower cover plate it supports.

[0046] In some embodiments of the present application, the heat exchanger has a first end plate and a second end plate at both ends thereof in a direction perpendicular to its air supply direction; the air conditioner indoor unit further includes:

[0047] a first cover plate, which is in contact with and connected to the first end plate, wherein an end surface of the first cover plate communicating with the air outlet cavity abuts against the housing assembly;

[0048] The second cover plate is in contact with and connected to the second end plate, and the end surface of the second cover plate communicating with the air outlet cavity abuts against the shell assembly.

[0049] The advantages or beneficial effects of the above technical solution are: the first end plate is connected to the first cover plate, and the end surfaces of the first cover plate connected to the air outlet cavity are respectively abutted against the shell assembly, so that the side space of the first end plate can be closed to prevent air flow from the air inlet side to the air outlet side from the first end plate.

[0050] The second end plate is connected to the second cover plate, and the end surfaces of the second cover plate connected to the air outlet cavity are respectively against the shell components, which can close the space on the side of the second end plate and prevent air from flowing from the air inlet side to the air outlet side through the second end plate.

[0051] Due to the blocking effect of the first cover plate and the second cover plate, the air flow can be maximized to flow to the air outlet after heat exchange at the heat exchanger, thereby ensuring the heat exchange efficiency of the heat exchanger and improving the working efficiency of the air conditioner indoor unit.

[0052] In some embodiments of the present application, a first flange portion is provided on the first end plate, and a support portion is provided on the first cover plate, which protrudes toward the first end plate, and the support portion abuts against the first flange portion.

[0053] The advantages or beneficial effects of the above technical solution are: the support part on the first cover plate is offset against the first flange part on the first end plate. The support part can not only support and position the first flange part, but also form a contact seal between the first cover plate and the first end plate, thereby reducing airflow leakage in the left space.

[0054] In some embodiments of the present application, a second flange portion is provided at the end of the second end plate facing the second cover plate, and a third flange portion is provided at the end of the second cover plate facing the second end plate, and the third flange portion is abutted against the second flange portion.

[0055] The advantages or beneficial effects of the above technical solution are: the second end plate and the second cover plate are abutted against each other by the flanges to form a contact seal, which can not only achieve the connection between the second end plate and the second cover plate, but also prevent airflow from leaking from the periphery of the second end plate.

[0056] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0058] Figure 1 shows the appearance of an air conditioner indoor unit according to some embodiments;

[0059] Figure 2 shows the appearance of an air conditioner indoor unit from another angle according to some embodiments;

[0060] Figure 3 The figure shows the appearance of an indoor unit of an air conditioner according to some embodiments, wherein the upper cover plate and the insulation layer in the housing assembly are removed;

[0061] Figure 4 A diagram showing an installation structure in which a heat exchanger is arranged in a water receiving tray in an air conditioner indoor unit according to some embodiments is shown;

[0062] Figure 5 shows a cross-sectional view of an air conditioner indoor unit according to some embodiments;

[0063] Figure 6 A perspective view of a water receiving tray in an air conditioner indoor unit according to some embodiments is shown;

[0064] Figure 7 Shown Figure 6 Enlarged view of part A;

[0065] Figure 8 shows a cross-sectional view of a water receiving tray in an air conditioner indoor unit according to some embodiments;

[0066] Figure 9 Shown Figure 8 Enlarged view of part B;

[0067] Figure 10 A perspective view of the back of a water receiving tray in an air conditioner indoor unit according to some embodiments is shown;

[0068] Figure 11 Shows a partial exploded view of an air conditioner indoor unit according to some embodiments Figure 1 ;

[0069] Figure 12 A diagram showing the coordination of a first end plate and a first cover plate in an air conditioner indoor unit according to some embodiments is shown;

[0070] Figure 13 An exploded view of a first end plate and a first cover plate in an air conditioner indoor unit according to some embodiments is shown;

[0071] Figure 14 shows a side view of a first cover plate in an air conditioner indoor unit according to some embodiments;

[0072] Figure 15 Shows a partial exploded view of an air conditioner indoor unit according to some embodiments Figure 2 ;

[0073] Figure 16 A diagram showing the coordination of a second end plate and a second cover plate in an air conditioner indoor unit according to some embodiments is shown;

[0074] Figure 17 An exploded view of a second cover plate and a second end plate in an air conditioner indoor unit according to some embodiments is shown;

[0075] Reference numerals:

[0076] 10. Shell assembly; 101. Hook; 102. First cavity; 103. Second cavity; 103A. Air inlet; 103B. Air outlet; 11. Air inlet; 12. Air outlet; 13. Middle partition; 14. Shell; 141. Top wall; 142. Bottom wall; 143. Left side wall; 144. Right side wall; 145. Front side wall; 15. Insulation layer; 151. First convex portion; 152. Second convex portion; 20. Fan; 30. Heat exchange 31. Heat exchanger body; 310. Flanged hole; 311. Heat exchange tube; 312. Fin; 32. First end plate; 321. First flange portion; 322. First connecting portion; 323. First flange portion; 324. Second flange portion; 33. Second end plate; 331. Second flange portion; 332. Third flange portion; 3321. Positioning groove; 334. Fourth flange portion; 40. Water tray; 401. Recessed portion; 402. Reinforcement rib; 41, water collection area; 411, first water collection area; 411A, first drainage portion; 413A, flow channel; 413A1, first flow channel; 413A2, second flow channel; 412, second water collection area; 412A, second drainage portion; 412B, flow guide; 413, first protrusion; 42, drainage area; 43, second protrusion; 431, left side; 432, right side; 433, inclined portion; 434, receiving portion; 50 , first cover plate; 501, plug-in part; 51, supporting part; 511, first supporting part; 512, second supporting part; 52, limiting part; 521, limiting reinforcement rib; 53, first plate part; 54, second plate part; 541, raised part; 55, first inclined surface; 56, first groove; 60, second cover plate; 61, third flange part; 611, limiting piece; 62, second inclined surface; 63, second groove; 64, fourth flange part. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0078] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0079] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0080] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0081] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0082] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0083] In this application, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0084] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0085] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser to a lower-pressure liquid. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves cooling by utilizing the latent heat of evaporation to exchange heat with the material being cooled. Throughout this cycle, the air conditioner regulates the temperature of the indoor space.

[0086] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0087] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0088] According to some embodiments of the present application, the air conditioner may be an all-in-one unit in which the indoor unit and the outdoor unit are integrated in one housing, or may be a split unit in which the indoor unit and the outdoor unit are independently and separately installed.

[0089] The following describes the present application by taking the indoor unit in a split unit and the ducted unit with the indoor unit being a ceiling-mounted unit as examples.

[0090] See also Figures 1 to 3 In some embodiments of the present application, the air conditioner indoor unit includes a housing assembly 10 in which a plurality of components constituting a refrigeration cycle are installed.

[0091] The housing assembly 10 is in the shape of a rectangular parallelepiped. An air inlet 11 is provided on one of the opposite side surfaces of the housing assembly 10. An air outlet 12 is formed on the side opposite the air inlet 11. Indoor air is introduced into the housing assembly 10 through the air inlet 11 and is then delivered to the indoor space through the air outlet 12 (see FIG. Figure 3 direction of the arrow shown in the figure).

[0092] For the convenience of description, this application defines the side of the air-conditioning indoor unit where the air outlet 12 is located as the front side, and the other side opposite thereto as the rear side. Figure 1 and Figure 3 As shown, the air outlet 12 is at the front and the air inlet 11 is at the back.

[0093] In some embodiments of the present application, the air inlet 11 can be connected to the air inlet grille of the ceiling decoration, so that indoor air can flow into the shell assembly 10 through the air inlet grille and the air inlet 11. An air outlet flange can be set on the outside of the air outlet 12, and the air outlet flange can be connected to the air duct and extended from the air duct to the indoor space.

[0094] See also Figure 1 and Figure 2 Four hooks 101 can be provided at the four corners of the shell assembly 10 to facilitate ceiling installation.

[0095] See also Figures 3 to 5 A middle partition 13 may be provided in the shell assembly 10, and the space in the shell assembly 10 is divided into a first cavity 102 and a second cavity 103 by the middle partition 13. A fan 20 is provided in the first cavity 102 and the first cavity 102 is connected to the air inlet 11. The fan 20 receives air from the air inlet 11. The fan 20 may be a centrifugal fan. The air flow on the air outlet side of the fan 20 is blown to the second cavity 103 through the middle partition 13.

[0096] The air conditioner indoor unit may include a heat exchanger 30 and a water receiving pan 40, which are arranged in the second cavity 103. The heat exchanger 30 is used to absorb heat from the air introduced into the second cavity 103 when used as an evaporator or to transfer heat to the air when used as a condenser.

[0097] See also Figure 5 The windward side and the outlet side of the heat exchanger 30 correspond to the air inlet cavity 103A and the air outlet cavity 103B respectively. The air inlet cavity 103A is connected to the first cavity 102, and the air outlet cavity 103B is connected to the air outlet 12. Under the action of the fan 20, the indoor air enters the first cavity 102 from the air inlet 11, then flows into the air inlet cavity 103A through the fan 20, and is discharged to the indoor space through the air outlet 12 after heat exchange in the heat exchanger 30. The direction from the air inlet side to the air outlet side of the heat exchanger 30 is the air supply direction of the heat exchanger (see Figure 3 The direction of the arrow, that is Figure 1 and Figure 2 (from back to front as shown in the figure).

[0098] During the cooling process, the indoor refrigerant is in a low-temperature state. After the heat exchange of the indoor heat exchanger 30, the low-temperature refrigerant and the indoor air exchange heat, which will cause water in the air to be separated out. The condensed water will adhere to the surface of the heat exchanger 30, and the condensed water will accumulate and drip into the water receiving tray 40 below.

[0099] The drain pan 40 may be connected to a drain pipe connected to the outside of the housing assembly 10 and drain the condensed water to the outside of the housing assembly 10 .

[0100] In some embodiments of the present application, the water collection tray 40 may include a water collection portion and a drainage portion, wherein the drainage portion is located in the air inlet cavity 103A on the air inlet side of the heat exchanger 30; and the water collection portion is located in the air outlet cavity 103B on the air outlet side of the heat exchanger 30.

[0101] Since the drainage part is connected to the air inlet chamber 103A, and the water collection part is connected to the air outlet chamber 103B, if the condensed water in the water collection part is discharged to the drainage part, a water flow channel needs to be opened. However, once the water flow channel is opened, the air inlet chamber 103A and the air outlet chamber 103B will be connected at the position of the water flow channel, resulting in a small amount of airflow in the air inlet chamber 103A of the heat exchanger 30 may flow through the water flow channel to the air outlet chamber 103B, affecting the performance and efficiency of the heat exchanger 30.

[0102] Therefore, it is necessary to consider designing the structure of the flow channel to achieve one-way drainage without air leakage. Please refer to the following for details.

[0103] In some embodiments of the present application, in order to drain the condensed water dripping into the water collection area 41 on the air outlet side and the air inlet side of the heat exchanger 30 to the drainage area 42, the water collection part may include a first water collection area 411, and a first drainage part 411A is recessed in the first water collection area 411.

[0104] The drainage section can include a second water collection area 412 and a drainage area 42. The first water collection area 411 and the second water collection area 412 are located on either side of the heat exchanger 30, respectively. The drainage area 42 is located on one side of the heat exchanger 30. That is, the drainage area 42 is located on one side of both the first water collection area 411 and the second water collection area 412. The drainage area 42 can be connected to a drainage pump and other related drainage components. The space above the drainage area 42 can be used to lay out the copper pipes connected to the heat exchanger 30.

[0105] In some embodiments of the present application, in order to arrange the heat exchanger 30 , the water receiving tray 40 further includes a first protrusion 413 .

[0106] The first protrusion 413 is formed by protruding and extending in a direction perpendicular to the air supply direction of the heat exchanger 30, and is used to support the heat exchanger 30. The bottom of the heat exchanger 30 is flat, and the top surface corresponding to the first protrusion 413 is also flat. Therefore, the bottom of the heat exchanger 30 can be abutted against the top surface of the first protrusion 413 to avoid air leakage from the bottom.

[0107] In some embodiments of this application, see Figure 5 The upper end of the heat exchanger 30 away from the first protrusion 413 contacts the shell assembly 10, and the bottom end of the heat exchanger 30 abuts against the first protrusion 413, which ensures that air flow does not flow through the top and bottom of the heat exchanger 30.

[0108] See also Figure 5The first water collection area 411 and the second water collection area 412 are respectively located on both sides of the first protrusion 413, that is, on both sides of the heat exchanger 30. The first water collection area 411 is on the air outlet side of the heat exchanger 30, and the second water collection area 412 is on the air inlet side of the heat exchanger 30.

[0109] In some embodiments of the present application, the second drainage portion 412A is connected to the drainage area 42, and can directly drain the condensed water in the second water collection area 412 to the drainage area 42. Figures 5 to 7 ,

[0110] A flow channel 413A is formed between the first drainage portion 411A and the drainage area 42 . The first drainage portion 411A drains the condensed water in the first water collection area 411 to the flow channel 413A, and then drains the condensed water to the drainage area 42 through the flow channel 413A.

[0111] In some embodiments of the present application, the flow channel 413A is configured to overcome the pressure loss between the air inlet chamber 103A and the air outlet chamber 103B of the heat exchanger 30, and press the condensed water discharged into the flow channel 413A by the first drainage portion 411A down to the drainage area 42.

[0112] In this way, when the air-conditioning indoor unit is working stably, the pressure loss on both sides of the heat exchanger 30 is also fixed. Therefore, as long as there is a water column in the flow channel 413A, the pressure corresponding to the liquid level difference overcomes the pressure loss, and the water will be drained continuously by utilizing the siphon principle. While draining water, the water column will also seal the flow channel 413A to avoid air leakage through the flow channel 413A, thereby realizing isolation between the air inlet chamber 103A and the air outlet chamber 103B of the heat exchanger 30, so that the airflow on the air inlet side of the heat exchanger 30 can be heated through the heat exchanger 30 to the greatest extent, thereby improving the heat exchange efficiency and performance of the heat exchanger 30.

[0113] In some embodiments of the present application, the flow channel 413A passes through the second protrusion 43 to the drainage area 42. Therefore, the structure of the flow channel 413A is designed taking into account the structure of the second protrusion 43 to ensure that one-way drainage to the drainage area 42 can be achieved by utilizing the siphon principle.

[0114] The flow channel 413A includes a first flow channel and a second flow channel. When the water in the first flow channel needs to be pressed to the second flow channel, the situation of the bottom surface of the second protrusion 43 needs to be considered. In some embodiments of the present application, the bottom surface of the second protrusion 43 can be a surface inclined toward the drainage area 42, or it can be a horizontal surface parallel to the bottom wall of the first flow channel.

[0115] In some embodiments of this application, see Figure 9The first flow channel 413A1 is recessed at the end of the first drainage portion 411A and extends to the projection position directly below the left side 431 of the second protrusion 43 toward the first drainage portion 411A, wherein the bottom wall of the first flow channel 413A1 is horizontal, and water from the end of the first drainage portion 411A flows down to the first flow channel 413A1.

[0116] The second flow channel 413A2 communicates with the first flow channel 413A1 and the drainage area 42 .

[0117] When the bottom surface of the second protrusion 43 is an inclined surface toward the drainage area 42, the second flow channel 413A2 passes through the bottom of the second protrusion 43 and is inclined upward from the first flow channel 413A1 to the drainage area 42 (see the direction of water flow). Figure 9 In the direction of the dotted arrow, the inclination of the second flow channel 413A2 is consistent with the inclination of the bottom of the second protrusion 43. In this way, the inclined flow channel 413A can reduce the obstruction of the bottom of the second protrusion 43 to the water flow when a liquid level difference occurs, thereby achieving smooth drainage and improving drainage efficiency.

[0118] In some embodiments of the present application, when forming the first flow channel 413A1 and the second flow channel 413A2 as described above, in order to overcome the pressure loss and achieve smooth drainage when pressure loss occurs, it is necessary to design the water inlet height L1 of the end of the first drainage portion 411A from the bottom wall of the first flow channel 413A1, the drainage height L2 of the second flow channel 413A2, and the depth L3 of the bottom wall of the first flow channel 413A1 from the bottom end of the second protrusion 43 to decrease in sequence, and (L1-L2)>△P / (ρ*g), where △P is the pressure loss between the air outlet side and the air outlet side of the heat exchanger 30, ρ is the water density, and g is the acceleration of gravity.

[0119] In this way, when draining water, water columns will be formed in the first flow channel 413A1 and the second flow channel 413A2, which will seal the flow channels. The air flow cannot pass through the flow channels from the air inlet side to the air outlet side, thus avoiding air leakage.

[0120] In some embodiments of the present application, when the bottom surface of the second protrusion 43 is a horizontal surface parallel to the bottom wall of the first flow channel 413A1, the first flow channel 413A1 is recessed at the end of the first drainage portion 411A and extends to a projection position directly below the right side 432 of the second protrusion 43 toward the drainage area 42, wherein the bottom wall of the first flow channel 413A1 is horizontal.

[0121] The second flow channel 413A2 communicates with the first flow channel 413A1 and the drainage area 42 .

[0122] In some embodiments of the present application, the bottom wall of the second flow channel 413A2 may be horizontal, that is, the bottom wall of the second flow channel 413A2 extends horizontally from the projection position directly below the right side 432 of the second protrusion 43 toward the drainage area 42 to the drainage area 42 .

[0123] In some embodiments of the present application, the bottom wall of the second flow channel 413A2 may be inclined, that is, the bottom wall of the second flow channel 413A2 extends upward from the projection position directly below the right side 432 of the second protrusion 43 toward the drainage area 42 to the drainage area 42 .

[0124] The inclined second flow channel 413A2 facilitates the guidance of drainage when a height difference of the liquid level occurs, thereby improving drainage efficiency.

[0125] In some embodiments of the present application, in order to guide drainage and enhance drainage fluidity, the first drainage portion 411A and the second drainage portion 412A are both inclined toward the drainage area 42 .

[0126] In some embodiments of the present application, a flow channel (not shown) can be formed between the first drain portion 411A and the second drain portion 412A, and the first drain portion 411A drains the condensed water in the first water collection area 411 to the flow channel, and then drains it to the drainage area 42 through the second drain portion 412A.

[0127] In some embodiments of the present application, the flow channel is configured to overcome the pressure loss between the air inlet chamber 103A and the air outlet chamber 103B of the heat exchanger 30, and press the condensed water discharged from the first drainage portion 411A into the flow channel 413A down to the drainage area 42.

[0128] In some embodiments of the present application, the flow channel passes through the first protrusion 43 to the second drainage portion 412A. Therefore, the structure of the flow channel is designed taking into account the structure of the first protrusion 43 to ensure that one-way drainage to the second drainage portion 412A can be achieved by utilizing the siphon principle.

[0129] The specific structural arrangement of the flow channel can be found in Figures 5 to 10 And combined with the above-mentioned content design, no further details are given here. In some embodiments of this application, continue to refer to Figure 5 and Figure 6 A guide portion 412B is further provided in the second water collection area 412. The guide portion 412B is closer to the air outlet side of the fan 20 than the second drainage portion 412A. That is, the second drainage portion 412A is located between the first protrusion 413 and the guide portion 412B. The guide portion 412B is perpendicular to the air supply direction of the fan 20 (see Figure 5 The height of the drain portion 412B (in the direction indicated by the solid arrow) gradually decreases along the air supply direction toward the second drain portion 412A, that is, the second drain portion 412A is located at the lowest point of the guide portion 412B.

[0130] The guide portion 412B is used to guide the airflow discharged by the fan 20, and has a guiding effect on the airflow, so that the wind field reaching the air inlet side surface of the heat exchanger 30 is more evenly distributed, thereby improving the heat exchange efficiency of the heat exchanger 30.

[0131] In some embodiments of the present application, the material of the water tray 40 is generally plastic, including but not limited to ABS (acrylonitrile-butadiene-styrene terpolymer), PP (polypropylene), PC (polycarbonate), etc., and the thickness is generally not too thick (for example, 2.5 mm).

[0132] Therefore, in order to enhance the strength of the water tray 40, see Figure 10 A plurality of reinforcing ribs 402 are added to the outer side of the bottom of the water receiving tray 40 to enhance its strength and extend its service life.

[0133] In some embodiments of the present application, in addition to adding reinforcing ribs 402, vibration-damping materials (for example, vibration-damping felt, PU cotton, etc., not shown) are also affixed to the reinforcing ribs 402 to prevent condensation around the water receiving tray 40 and at the same time prevent the water receiving tray 40 from expanding and generating vibration noise between the bottom wall 142 it supports.

[0134] In some embodiments of this application, see Figure 4 The heat exchanger 30 includes a heat exchanger body 31. The heat exchanger body 31 may be a finned heat exchanger, comprising heat exchange tubes 311 and fins 312. When viewed from the side, the heat exchange tubes 311 are arranged vertically and spaced apart. The ends of the heat exchange tubes 311 are connected in a U-shape. The fins 312 are inserted through the heat exchange tubes 311.

[0135] A refrigerant for heat exchange flows through the heat exchange tube 311 , and the fins 312 are used to increase the heat exchange area of ​​the heat exchange tube 311 and improve the heat exchange efficiency of the heat exchanger 30 .

[0136] The heat exchanger 30 includes end plates located at both ends of the heat exchanger body 31. The end plates limit the fins 312 to prevent the fins 312 from detaching from the heat exchange tubes 311.

[0137] In some embodiments of the present application, the end plate is provided with a plurality of flanged holes 310 extending left and right for passing heat exchange tubes 311. The "U"-shaped connection between the heat exchange tubes 311 is located on the outside of the end plate.

[0138] See also Figure 4 The end plate includes a first end plate 32 located on the left side of the heat exchanger body 31 and a second end plate 33 located on the right side of the heat exchanger body 31 .

[0139] Continue to see Figures 11 to 14The air conditioner indoor unit includes a first cover plate 50. The first cover plate 50 is connected to the left side of the water receiving tray 40. The first cover plate 50 is connected to the first end plate 32 and the housing assembly 10 to minimize or even prevent airflow from flowing from the left side of the heat exchanger 30 to the air outlet 12 without passing through the heat exchanger 30.

[0140] The first cover plate 50 is in contact with and connected to the first end plate 32, so that a contact seal is formed between the first cover plate 50 and the first end plate 32; the upper side surface of the first cover plate 50 abuts against the upper end inner wall of the shell assembly 10, and the front side surface of the first cover plate 50 abuts against the front end inner wall of the shell assembly 10 to close the left side space of the first end plate 32 and prevent air flow from flowing from the left side space of the first end plate 32 to the air outlet 12, that is, the first end plate 32 can be closed by the first cover plate 50.

[0141] Continue to see Figures 15 to 17 The air conditioner indoor unit includes a second cover plate 60. The second cover plate 60 corresponds to the upper side of the second protrusion 43. The lower end of the second cover plate 60 can abut against the second protrusion 43, thereby preventing air from passing through the lower side of the second cover plate 60.

[0142] The second cover plate 60 is connected to the second end plate 33 , the housing assembly 10 and the second protrusion 43 to minimize or even prevent airflow from flowing from the right side of the heat exchanger 30 to the air outlet 12 without passing through the heat exchanger 30 .

[0143] The rear end of the second cover plate 60 is in contact with the front end of the second end plate 33, so that a contact seal is formed between the second cover plate 60 and the second end plate 33; the upper side surface of the second cover plate 60 abuts against the upper end inner wall of the shell assembly 10, the front side surface of the second cover plate 60 abuts against the front end inner wall of the shell assembly 10, and the lower side surface of the second cover plate 60 abuts against the second protrusion 43 to close the right side space of the second end plate 33 and prevent air flow from flowing from the right side space of the second end plate 33 to the air outlet 12, that is, thereby, the second end plate 33 can be closed by the second cover plate 60.

[0144] Due to the blocking effect of the first cover plate 50 and the second cover plate 60, the air flow can flow from the heat exchanger 30 to the air outlet 12 to the greatest extent, thereby ensuring the heat exchange efficiency of the heat exchanger 30 and improving the working efficiency of the air conditioner indoor unit.

[0145] In some embodiments of this application, see Figure 13 and Figure 14 The front end of the first end plate 32 is provided with a first flange portion 321 that is flanged to the left. The right side surface of the first cover plate 50 is provided with a support portion 51 that protrudes toward the direction (right side) close to the first end plate 32. The first flange portion 321 abuts against the support portion 51.

[0146] Since the gap between the first flange portion 321 and the support portion 51 is different from the overall flow direction (front-back direction) of the airflow, the arrangement of the first flange portion 321 and the support portion 51 against each other increases the resistance of the airflow through the gap, thereby preventing the airflow from leaking from the first flange portion 321.

[0147] In addition, the support portion 51 can support the first end plate 32, ensuring the stability of the left end position of the heat exchanger 30; and the support portion 51 can position the first end plate 32, improving the assembly efficiency between the first cover plate 50 and the first end plate 32.

[0148] In some embodiments of this application, see Figure 13 and Figure 14 A stopper 52 is further provided on the right side of the first cover plate 50. The stopper 52 is spaced apart from the support portion 51. The space between the stopper 52 and the support portion 51 forms an inserting portion 501. The first flange portion 321 of the first end plate 32 is inserted into the inserting portion 501.

[0149] In some embodiments of the present application, a first connecting portion 322 may be provided on the first flange portion 321 , and the first connecting portion 322 is connected to the first cover plate 50 via fasteners such as screws, thereby achieving a fastened connection between the first end plate 32 and the first cover plate 50 .

[0150] The first cover plate 50 includes a first plate portion 53. The first plate portion 53 is located on the left side of the water receiving tray 40 and abuts against the left side surface of the water receiving tray 40.

[0151] The first cover plate 50 includes a second plate portion 54 . The second plate portion 54 is connected to the right side of the first plate portion 53 , and the lower end of the second plate portion 54 abuts against the upper end of the water receiving tray 40 .

[0152] The lower end of the second plate portion 54 is provided with a downwardly protruding protrusion 541. In conjunction with Figure 6, the top of the left side wall of the water receiving tray 40 is provided with a downwardly recessed recess 401. The protrusion 541 is inserted into the recess 401.

[0153] The first connecting portion 322 on the first flange portion 321 is connected to the protruding portion 541 by screws.

[0154] The raised portion 541 can be triangular in shape. The cross-section of the raised portion 541 gradually decreases from top to bottom. Correspondingly, the recessed portion 401 also has a triangular shape. The cross-section of the recessed portion 401 gradually increases from top to bottom. This triangular structure facilitates the installation of the raised portion 541 into the recessed portion 401, ensuring assembly efficiency. Furthermore, the coordination of the raised portion 541 and the recessed portion 401 ensures proper positioning between the first cover plate 50 and the water tray 40, further improving assembly efficiency.

[0155] The first connection portion 322 abuts against the front inclined surface of the protrusion 541 .

[0156] The first flange portion 321 includes a first flange part 323. The first flange part 323 is located in the upper middle portion of the first flange portion 321 and extends in the up-down direction.

[0157] The first flange portion 321 includes a second flange portion 324. The second flange portion 324 is located below the first flange portion 323 and extends obliquely downward from top to bottom in a direction away from the air outlet 12.

[0158] The supporting portion 51 includes a first supporting portion 511 . The first supporting portion 511 abuts against the first flange portion 323 .

[0159] The supporting portion 51 includes a second supporting portion 512 . The second supporting portion 512 abuts against the second flange portion 324 .

[0160] The support portion 51 may be located at the rear side of the first flange portion 321 , and may support the heat exchanger 30 to prevent the heat exchanger 30 from falling backward.

[0161] The limiting portion 52 is located at the front side of the first flange portion 321 and is used to limit the heat exchanger 30 from moving forward.

[0162] A limiting reinforcement rib 521 is provided on one side (front side) of the limiting portion 52 away from the plug-in portion 501 , which can increase the structural strength of the limiting portion 52 and prevent the limiting portion 52 from being deformed or broken due to the force of the heat exchanger 30 .

[0163] In some embodiments of the present application, the first connecting portion 322 as described above is provided on the second flange portion 324 , and the first connecting portion 322 is connected to the raised portion 541 of the first cover plate 50 , thereby achieving the connection between the first cover plate 50 and the first end plate 32 .

[0164] In some embodiments of this application, see Figures 15 to 17 The rear end of the second cover plate 60 is spliced ​​with the front end of the second end plate 33, and the Figure 4 The lower portion of the second cover plate 60 abuts against the second protrusion 43, and the lower front end portion of the second end plate 33 extends obliquely downward from top to bottom in a direction away from the air outlet 12, and the bottom of the second end plate 33 is horizontal (see Figure 5 ) and abuts against the second protrusion 43.

[0165] A second flange portion 331 extending to the right is provided at the front end of the second end plate 33. A third flange portion 61 extending to the right is provided at the rear end of the second cover plate 60. The third flange portion 61 abuts against and connects to the second flange portion 331.

[0166] The second flange portion 331 includes a third flange portion 332 located at an upper portion. The third flange portion 332 extends straight downward from top to bottom toward the air outlet 12 .

[0167] The second flange portion 331 includes a fourth flange portion 334 located below the third flange portion 332 . The fourth flange portion 334 extends linearly in the vertical direction.

[0168] The third flange portion 332 is provided with a positioning groove 3321. The top of the third flange portion 61 is provided with a limiting piece 611, which is inserted into the positioning groove 3321 and abuts against the rear side of the third flange portion 332, thereby achieving the hook connection between the third flange portion 61 and the third flange portion 332.

[0169] By installing the limiting piece 611 at the positioning groove 3321 , the third flange portion 61 and the second flange portion 331 can be positioned, that is, the second cover plate 60 and the second end plate 33 can be positioned.

[0170] The third flange portion 61 and the fourth flange portion 334 are fastened together by screws.

[0171] In some embodiments of the present application, refer back to Figure 7 The second protrusion 43 also includes an inclined portion 433 that matches the inclination of the lower front end portion of the second end plate 33 and a receiving portion 434 that abuts against the lower portion of the second cover plate 60.

[0172] The second cover plate 60 abuts against the second end plate 33, and the lower portion of the second cover plate 60 and the lower portion of the front end of the second end plate 33 abut against the second protrusion 43 respectively, so that the second cover plate 60 seals the space on the right side of the heat exchanger 30, preventing air from flowing from the space on the right side of the second end plate 33 to the air outlet 12.

[0173] In some embodiments of the present application, continue to refer to Figure 1 and Figure 2 The housing assembly 10 includes a shell 14. The shell 14 may be a sheet metal part.

[0174] The housing 14 includes a top wall 141 forming the top structure of the housing 14; a bottom wall 142 forming the bottom structure of the housing 14; a left side wall 143 connected between the left end of the top wall 141 and the left end of the bottom wall 142; a right side wall 144 connected between the right end of the top wall 141 and the right end of the bottom wall 142; and a front side wall 145 located at the front side of the housing 14. The air outlet 12 is provided on the front side wall 145.

[0175] In some embodiments of the present application, the top wall 141, the left side wall 143 and the upper portion of the right side wall 144 can be made of the same top plate. The lower portion of the right side wall 144 is connected to the upper portion of the right side wall 144.

[0176] The left side wall 143 and the first cover plate 50 are connected by screws.

[0177] The front side of the first cover plate 50 abuts against the front side wall 145 to form a contact seal. The front end of the second cover plate 60 abuts against the front side wall 145 to form a contact seal.

[0178] The second cover plate 60 may be a sheet metal part. Figure 16 The front end of the second cover plate 60 has a fourth flange portion 64, which abuts against the front side wall 145 and is connected by screws.

[0179] See also Figure 1 、 Figure 2 、 Figure 5 、 Figure 11 and Figure 15 The housing assembly 10 may include an insulation layer 15. The insulation layer 15 may be made of insulation foam. The insulation layer 15 is used to prevent condensation on the top of the air outlet 12.

[0180] In some embodiments of the present application, the insulation layer 15 is connected to the inner side of the top wall 141. The insulation layer 15 is located in the second cavity 103 and extends from the air outlet 12 to the middle partition 13 in the front-to-back direction.

[0181] See also Figure 11 and Figure 13 A first inclined surface 55 is provided at the top of the front end of the first cover plate 50. The first inclined surface 55 is inclined downward in the direction close to the air outlet 12. A first groove 56 with an upward opening is formed between the first inclined surface 55 and the front side wall 145 of the housing 14.

[0182] See also Figure 15 and Figure 16 A second inclined surface 62 is provided at the top of the front end of the second cover plate 60. The second inclined surface 62 is inclined downward in the direction close to the air outlet 12. A second groove 63 with an upward opening is formed between the second inclined surface 62 and the front side wall 145 of the housing 14.

[0183] See also Figure 11 and Figure 15 The front bottom of the thermal insulation layer 15 is provided with a first protrusion 151 and a second protrusion 152. The first protrusion 151 is inserted into the first groove 56, and the second protrusion 152 is inserted into the second groove 63. The cooperation between the first groove 56, the second groove 63 and the thermal insulation layer 15 can realize the positioning of the thermal insulation layer 15.

[0184] In some embodiments of the present application, refer back to Figure 5 The top of the heat exchanger 30 abuts against the thermal insulation layer 15. The top side of the first cover plate 50 and the top side of the second cover plate 60 both abut against the thermal insulation layer 15.

[0185] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0186] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

[0187] Wherever possible, the various aspects and features described and illustrated in this specification may be applied separately, and these separate aspects may be the subject of divisional applications.

Claims

1. An air conditioner indoor unit, characterized in that: include: a housing assembly having an air outlet provided thereon; a fan, which is arranged in the housing assembly near the return air outlet; a heat exchanger disposed within the housing and installed between the air outlet side of the fan and the air outlet, for exchanging heat with the airflow passing therethrough; A water receiving tray is installed in the housing assembly and is located below the heat exchanger, and is used to receive condensed water generated when the airflow passes through the heat exchanger during the cooling operation of the air conditioner indoor unit, and includes: A drainage portion, located in the air inlet cavity on the air inlet side of the heat exchanger, for draining condensed water generated when the airflow on the air inlet side exchanges heat with the heat exchanger; a water collecting portion, located in the air outlet cavity on the air outlet side of the heat exchanger, for collecting condensed water generated when the airflow on the air outlet side exchanges heat with the heat exchanger; A flow channel is formed between the water collecting part and the drainage part, and the flow channel is configured to overcome the pressure loss between the air inlet chamber and the air outlet chamber of the heat exchanger, and press the condensed water discharged from the water collecting part to the flow channel down to the drainage part.

2. The air conditioner indoor unit according to claim 1, characterized in that: The water collection portion includes a first water collection area, which is located at the air outlet side of the heat exchanger, and a first drainage portion is formed in the first water collection area; the drainage portion includes: A second water collection area is located at the air inlet side of the heat exchanger, and a second drainage portion is formed in the second water collection area; a drainage area located on one side of the heat exchanger and in communication with the second drainage portion; The water receiving tray further includes: a first protrusion located in the water receiving tray and extending perpendicularly to the air supply direction of the heat exchanger from the air inlet side to the air outlet side, the bottom of the heat exchanger abutting against the first protrusion, and the first water collection area and the second water collection area are respectively located on both sides of the first protrusion; The second protrusion is arranged in the water receiving tray and connected to the first protrusion, and is used to separate the first water collection area and the drainage area. The flow channel connects the first drainage part and the drainage area and is arranged below the second protrusion.

3. The air conditioner indoor unit according to claim 2, characterized in that: The flow channel includes: a first flow channel, which is recessed at the end of the first drainage portion and extends to a position directly below the projection of the second protrusion toward the side of the first drainage portion, wherein the bottom wall of the first flow channel is horizontal; a second flow channel, configured to connect the first flow channel and the drainage area, and passing through a bottom of the second protrusion; a bottom wall of the second flow channel being inclined upward from the first flow channel to the drainage area, and having an inclination consistent with that of the bottom of the second protrusion; Among them, the water inlet height L1 of the end of the first drainage portion from the bottom wall of the first flow channel, the drainage height L2 of the second flow channel, and the depth L3 from the bottom wall of the first flow channel to the bottom end of the second protrusion decrease successively, and (L1-L2)>△P / (ρ*g), where △P is the pressure loss between the air inlet side and the air outlet side of the heat exchanger, ρ is the water density, and g is the acceleration of gravity.

4. The air conditioner indoor unit according to claim 2, characterized in that: The flow channel includes: a first flow channel, which is recessed at the end of the first drainage portion and extends to a position directly below the projection of the side of the second protrusion facing the drainage area, wherein the bottom wall of the first flow channel is horizontal and parallel to the bottom of the second protrusion; a second flow channel, which is used to connect the first flow channel and the drainage area; Among them, the water inlet height L1 of the end of the first drainage portion from the bottom wall of the first flow channel, the drainage height L2 of the second flow channel, and the depth L3 from the bottom wall of the first flow channel to the bottom end of the second protrusion decrease successively, and (L1-L2)>△P / (ρ*g), where △P is the pressure loss between the air inlet side and the air outlet side of the heat exchanger, ρ is the water density, and g is the acceleration of gravity.

5. The air conditioner indoor unit according to claim 4, characterized in that: A bottom wall of the second flow channel is inclined upward from the first flow channel to the drainage area.

6. The air conditioner indoor unit according to claim 2, characterized in that: The second catchment area is provided with: The guide portion is arranged in the second water collection area, and the guide portion is closer to the air outlet side of the fan relative to the second drainage portion. The height of the guide portion perpendicular to the air supply direction of the fan gradually decreases along the air supply direction toward the second drainage portion.

7. The air conditioner indoor unit according to claim 1, wherein The outer side of the bottom of the water receiving tray is provided with a plurality of reinforcing ribs, or A plurality of reinforcing ribs are added to the outer side of the bottom of the water receiving tray, and vibration-damping materials are attached to the reinforcing ribs.

8. The air conditioner indoor unit according to claim 1, characterized in that: The heat exchanger has a first end plate and a second end plate at both ends thereof in a direction perpendicular to the air supply direction thereof; the air conditioner indoor unit further includes: a first cover plate, which is in contact with and connected to the first end plate, wherein an end surface of the first cover plate communicating with the air outlet cavity abuts against the housing assembly; The second cover plate is in contact with and connected to the second end plate, and the end surface of the second cover plate in contact with the air outlet cavity abuts against the shell assembly.

9. The air conditioner indoor unit according to claim 8, characterized in that: A first flange portion is provided on the first end plate, and a support portion is provided on the first cover plate, which protrudes toward the first end plate, and the support portion abuts against the first flange portion.

10. The air conditioner indoor unit according to claim 8, characterized in that: The end of the second end plate facing the second cover plate is provided with a second flange portion, and the end of the second cover plate facing the second end plate is provided with a third flange portion, and the third flange portion abuts against the second flange portion.

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