Indoor unit of air conditioner

Abstract

The utility model discloses an air conditioner indoor unit which comprises a shell. The air opening part comprises a bottom air opening assembly arranged at the lower end of the shell; the heat exchanger is arranged in the shell and located above the bottom air duct opening assembly, the heat exchanger comprises a first heat exchange part and a second heat exchange part, one ends of the first heat exchange part and the second heat exchange part are connected with each other, and the first heat exchange part and the second heat exchange part form an inverted-V-shaped structure with an opening facing the bottom air duct opening assembly; the fan component is arranged in the shell and located above the heat exchanger; the water receiving component comprises a first water receiving disc and a second water receiving disc, the first water receiving disc is arranged below the end, away from the second heat exchange part, of the first heat exchange part and used for receiving condensate water at the end, and the second water receiving disc is arranged below the end, away from the first heat exchange part, of the second heat exchange part and used for receiving condensate water at the end; during air supply, air flows through the bottom air duct opening assembly, the fan component drives the air to enter the shell, and the air exchanges heat with the heat exchanger when flowing in the shell.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an indoor air conditioning unit. Background Technology

[0002] Air conditioners are widely used in modern society as common electrical appliances. In existing air conditioner indoor units, to facilitate air exchange, the heat exchanger is usually placed near the air outlet. To collect condensate, traditional solutions require an integrated drip tray located below the center of the heat exchanger. However, the lateral extension of this drip tray directly obstructs the airflow path in the central duct, significantly increasing wind resistance and creating vortices, leading to reduced airflow efficiency and increased operating noise. This structural defect is particularly pronounced in applications requiring increased airflow. Although existing technologies attempt to improve wind resistance by optimizing the drip tray structure (such as reducing its thickness), the improvement is limited by the spatial coupling between the drip tray and the heat exchanger opening. Therefore, a new structural design that can effectively collect condensate while reducing wind resistance is urgently needed. Summary of the Invention

[0003] The purpose of this invention is to provide an air conditioning indoor unit with good heat exchange effect and high air supply efficiency.

[0004] This invention discloses an indoor unit for an air conditioner, comprising:

[0005] case;

[0006] The air vent component includes a bottom air duct assembly located at the lower end of the housing;

[0007] A heat exchanger is disposed inside the housing and located above the bottom air duct assembly. The heat exchanger includes a first heat exchange section and a second heat exchange section connected at one end to each other. The first heat exchange section and the second heat exchange section form an inverted V-shaped structure with the opening facing the bottom air duct assembly.

[0008] A fan component is disposed inside the housing and located above the heat exchanger;

[0009] The water receiving component includes a first water receiving tray and a second water receiving tray. The first water receiving tray is located below the end of the first heat exchange part that is away from the second heat exchange part to receive condensate from that end. The second water receiving tray is located below the end of the second heat exchange part that is away from the first heat exchange part to receive condensate from that end.

[0010] During air supply operation, air flows through the bottom air duct assembly, the fan component drives the air into the housing, and the air exchanges heat with the heat exchanger while flowing within the housing.

[0011] In this embodiment, the indoor unit of the air conditioner is configured with an inverted V-shaped structure including a first heat exchange section and a second heat exchange section. The heat exchanger is positioned above the bottom air duct opening and with the opening facing the bottom air duct opening. Two water collection trays are respectively arranged at the lower ends of the inverted V-shaped structure to collect condensate. Because the water collection trays are set separately, they can be made smaller. With the two water collection trays located on both sides, this structure can efficiently collect the condensate from the heat exchanger while avoiding obstruction of the middle area of ​​the heat exchanger, reducing the wind resistance of the air exchanging heat with the heat exchanger, and improving the heat exchange effect and air supply efficiency.

[0012] In some embodiments, a drain pipe is also provided at the lower end of the housing, the drain pipe being connected to the first water receiving tray and the second water receiving tray.

[0013] In this embodiment, because the drip tray is located at the bottom of the indoor unit of the air conditioner, the drain pipe at the bottom for discharging the condensate collected by the drip tray can be designed to be shorter, and the structural design can be simpler.

[0014] In some embodiments, the indoor unit of the air conditioner has a first state. In the first state, when the indoor unit of the air conditioner is operating to supply air, the fan component drives air into the housing and outputs air to the heat exchanger. After the air exchanges heat with the heat exchanger, it flows out to the outside from the bottom air duct assembly. The indoor unit of the air conditioner also has an air guide structure disposed between the heat exchanger and the fan component. The air guide structure is used to divide the air output by the fan component into two streams to be directed to the first heat exchange section and the second heat exchange section respectively.

[0015] In this embodiment, by setting an air guide structure, when the indoor unit of the air conditioner is in the first state, the air guide structure divides the air output by the fan component into two streams and directs them to the first heat exchange section and the second heat exchange section respectively, thereby making the heat exchanger heat exchange more uniform and improving the heat exchange efficiency.

[0016] In some embodiments, the air guide structure includes a V-shaped air guide with an opening facing the heat exchanger, the opening of which covers the interconnected ends of the first heat exchange section and the second heat exchange section.

[0017] In this embodiment, the air guide structure is designed in a V-shape, which better matches the inverted V-shaped heat exchanger, achieving a more suitable air guiding effect. In the embodiment shown in the figure, the windward side of the V-shaped air guide is designed with a streamlined shape, which can further improve the air guiding effect.

[0018] In some embodiments, the air outlet component further includes a top air duct outlet assembly disposed at the upper end of the housing, and the fan component includes a mounting bracket rotatably disposed relative to the housing, a drive member drivenly connected to the mounting bracket, and a cross-flow fan mounted on the mounting bracket. The cross-flow fan includes an impeller mounted on the mounting bracket and a baffle wall and a volute tongue arranged opposite to each other on both sides of the fan unit for air outlet of the impeller. The air conditioning indoor unit has a first state and a second state. In the first state, the outlet of the air duct of the cross-flow fan formed by the baffle wall and the volute tongue faces the bottom air duct outlet assembly. In the second state, the outlet of the air duct of the cross-flow fan formed by the baffle wall and the volute tongue faces the top air duct outlet assembly. The drive member is used to drive the mounting bracket to rotate relative to the housing so that the air conditioning indoor unit switches between the first state and the second state.

[0019] The indoor unit of this air conditioner can switch between discharging air to the upper part of the casing and discharging air to the lower part. When the indoor unit is cooling or heating, the denser cold air tends to blow downwards, which can easily lead to cold feet and a hot head, causing discomfort. By switching between a first state and a second state, the indoor unit of this embodiment allows the cold air to be output from the upper part during cooling, avoiding direct airflow onto people. Furthermore, the cold air sinks due to gravity, providing a more comprehensive cooling effect and greater comfort. During heating, the hot air is output from the lower part; its lower density allows it to rise, improving the uniformity of heating and achieving a more comprehensive heating effect.

[0020] In some embodiments, the air vent component further includes a first extension wall and a second extension wall, one end of the first extension wall and the second extension wall being fixedly connected to the top air duct assembly. In the second state, the outlet end of the volute tongue is aligned with the end of the first extension wall away from the top air duct assembly, and the outlet end of the shielding wall is aligned with the end of the second extension wall away from the top air duct assembly. The volute tongue, the shielding wall, the first extension wall and the second extension wall form an air duct for supplying air to the top air duct assembly.

[0021] This embodiment, by setting a first extension wall and a second extension wall, allows the volute tongue of the cross-flow fan and the outlet end of the shielding wall to face the top air duct assembly in the second state. The first and second extension walls can guide the airflow more efficiently, improving the airflow efficiency. In the first state, the outlet end of the volute tongue of the cross-flow fan and the shielding wall faces the heat exchanger. Since the heat exchangers are close, there is no need to set an extension wall to achieve efficient airflow to the heat exchanger. Thus, the structure switching between "long shielding wall, long volute tongue" and "short shielding wall, short volute tongue" is realized between the second and first states, achieving efficient and accurate airflow from the cross-flow fan, improving airflow utilization efficiency, and resulting in a compact and efficient structure.

[0022] In some embodiments, the top air duct assembly includes a first air vent, a second air vent, a first air guide plate assembly for closing and opening the first air vent, and a second air guide plate assembly for closing and opening the second air vent. One end of the first extension wall and the second extension wall are respectively connected to both ends of the first air vent. In the second state, the volute tongue, the shielding wall, the first extension wall, and the second extension wall form an air duct for supplying air to the first air vent.

[0023] In the second state of this embodiment, the cross-flow fan discharges air to the top air duct assembly. Since the airflow from the cross-flow fan is relatively concentrated, a single air outlet is sufficient to meet the airflow requirements; that is, only the first air outlet and the first air guide plate assembly need to be opened to achieve efficient airflow. In the first state, the top air duct assembly serves as the air inlet side of the cross-flow fan. Both the first and second air guide plate assemblies are open, thereby utilizing the first and second air outlets to provide airflow for the cross-flow fan. This better meets the large-area airflow requirements of the cross-flow fan, meaning this embodiment better satisfies both the airflow discharge requirements of the cross-flow fan in the second state and the airflow intake requirements in the first state.

[0024] In some embodiments, a third extension wall is further provided within the housing and connected at one end to the housing. The top air duct assembly is located between the first extension wall and the third extension wall. In a second state, the distance between the end of the shielding wall away from the heat exchanger and the end of the third extension wall away from the housing is less than a first preset distance to block airflow from the bottom air duct from flowing between the shielding wall and the third extension wall.

[0025] In this embodiment, by providing a third extension wall, in the second state, the third extension wall and the shielding wall can deliver more air from the bottom air duct assembly to the air inlet side of the cross-flow fan, preventing air from passing between the third extension wall and the shielding wall, thereby improving the air inlet efficiency of the cross-flow fan.

[0026] In some embodiments, the volute tongue is a U-shaped structure, comprising a first plate and a second plate located at both ends, and an intermediate plate arranged circumferentially along the impeller connecting the first plate and the second plate. In a second state, the distance between the free end of the first plate and the first extension wall is less than a second preset distance to block wind from flowing between the free end of the first plate and the first extension wall. In a first state, the distance between the free end of the second plate and the third extension wall is less than a third preset distance to block wind from flowing between the free end of the third plate and the third extension wall.

[0027] This embodiment, by designing the volute tongue as a U-shaped structure, can meet the requirements of the second preset distance and the third preset distance in the second state. Thus, in the second state, the volute tongue and the first extension wall can guide more of the air outlet of the cross-flow fan to the top air duct assembly, improving the air outlet efficiency. In the first state, it allows more of the air inlet of the top air duct assembly to be introduced into the air inlet side of the cross-flow fan, improving the air inlet efficiency of the cross-flow fan.

[0028] In some embodiments, the indoor unit of the air conditioner is a wall-mounted air conditioner.

[0029] In this embodiment of the wall-mounted air conditioner, the heat exchanger, fan components, and bottom air duct assembly are all arranged vertically. That is, when the wall-mounted air conditioner is installed on the wall, the bottom air duct, heat exchanger, and fan components are arranged vertically, which can reduce the horizontal dimensions of the wall-mounted air conditioner, i.e., reduce the width, thereby making it easier to arrange the wall-mounted air conditioner, reducing the horizontal space occupied by the installation, and also making it more aesthetically pleasing.

[0030] Based on the air conditioner indoor unit provided by the present invention, by setting the heat exchanger as an inverted V-shaped structure including a first heat exchange section and a second heat exchange section, and setting the heat exchanger above the bottom air duct opening with the opening facing the bottom air duct opening, and setting two water receiving trays respectively arranged at the lower ends of the inverted V-shaped structure to collect condensate, this structure can efficiently collect the condensate of the heat exchanger, and can avoid obstructing the middle area of ​​the heat exchanger, reduce the wind resistance of the air exchanging heat with the heat exchanger, and improve the heat exchange effect and air supply efficiency.

[0031] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0033] Figure 1 This is a cross-sectional view of the indoor unit of an air conditioner according to an embodiment of the present invention;

[0034] Figure 2 This is a cross-sectional view of an indoor air conditioner unit according to another embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional structural schematic diagram of an air conditioner indoor unit according to another embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional structural schematic diagram of an air conditioner indoor unit according to another embodiment of the present invention;

[0037] Figure 5 This is a cross-sectional structural schematic diagram of an air conditioner indoor unit according to another embodiment of the present invention;

[0038] Figure 6 This is a cross-sectional structural diagram of an air conditioner indoor unit according to another embodiment of the present invention. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0041] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] The indoor unit of the air conditioner in this embodiment includes a housing 1, an air outlet component, a heat exchanger 5, a fan component, and a water receiving component.

[0045] The air vent component includes a bottom air duct assembly 21 located at the lower end of the housing 1. A heat exchanger 5 is disposed inside the housing 1 and above the bottom air duct assembly 21. Refrigerant is introduced into the heat exchanger 5 to exchange heat with the air passing through it. When the air conditioner is cooling, the heat exchanger 5 acts as an evaporator for the refrigerant; when the air conditioner is heating, the heat exchanger 5 acts as a condenser for the refrigerant. The heat exchanger 5 includes a first heat exchange section 51 and a second heat exchange section 52 connected at one end. The first heat exchange section 51 and the second heat exchange section 52 form an inverted V-shaped structure with the opening facing the bottom air duct assembly 21. The inverted V-shaped structure is also known as a V-shaped structure with the opening facing downwards. In this embodiment, the opening of the inverted V-shaped structure faces the bottom air duct assembly 21 located below the heat exchanger. As shown in the figure, one end of the first heat exchange section 51 and the second heat exchange section 52 are connected to each other, and the connected ends form an inverted V-shaped structure at the top of the middle part. The mutually distant ends of the first heat exchange section 51 and the second heat exchange section 52 form the free ends of the first heat exchange section 51 and the second heat exchange section 52, respectively.

[0046] In this application, "upper" and "lower" refer to the orientation of the indoor air conditioner unit after it is installed and in operation. For example, if the indoor air conditioner unit is a wall-mounted unit, the orientation is based on the position of the wall-mounted unit after it is installed on the wall. After installation, the upper end of the indoor air conditioner unit is the upper end, and the lower end is the lower end.

[0047] A fan component is housed within the casing 1 and positioned above the heat exchanger 5. During operation, airflow passes through the bottom air duct assembly 21. The fan component drives the air into the casing 1, and the air exchanges heat with the heat exchanger 5 while flowing within the casing 1. In some embodiments, the bottom air duct assembly 21 serves as an air inlet, through which the fan component drives the air into the casing and then exchanges heat with the heat exchanger 5. In other embodiments, the bottom air duct assembly 21 serves as an air outlet, through which the fan component drives the air into the casing, exchanges heat with the heat exchanger 5, and then exits from the bottom air duct assembly 21 after heat exchange.

[0048] like Figures 1 to 6 As shown, the water receiving component includes a first water receiving tray 71 and a second water receiving tray 72. The first water receiving tray 71 is located below the end of the first heat exchange section 51 that is away from the second heat exchange section 52 to receive condensate from that end. The second water receiving tray 72 is located below the end of the second heat exchange section 52 that is away from the first heat exchange section 51 to receive condensate from that end. That is, the first water receiving tray 71 receives condensate from the free end of the first water receiving tray 71, and the second water receiving tray 72 receives condensate from the free end of the second water receiving tray 72.

[0049] In this embodiment, the indoor unit of the air conditioner is configured with a heat exchanger 5 in an inverted V-shaped structure including a first heat exchange section 51 and a second heat exchange section 52. The heat exchanger 5 is positioned above the bottom air duct opening and with the opening facing the bottom air duct opening. Two water collection trays are respectively arranged at the lower ends of the inverted V-shaped structure to collect condensate. Because the water collection trays are set separately, they can be made smaller. With the two water collection trays located on both sides, this structure can efficiently collect the condensate from the heat exchanger 5 while avoiding obstruction of the middle area of ​​the heat exchanger 5, reducing the wind resistance of the air exchanging heat with the heat exchanger 5, and improving the heat exchange effect and air supply efficiency.

[0050] In some embodiments, the indoor unit of the air conditioner further includes a drain pipe located at the lower end of the housing 1, and the drain pipe is connected to the first drip tray 71 and the second drip tray 72. In this embodiment, since the drip tray is located at the bottom area of ​​the indoor unit of the air conditioner, the drain pipe located at the lower end for draining the condensate collected by the drip tray can be designed to be shorter, and the structural design can be simpler.

[0051] In some embodiments, such as Figure 3 and Figure 6As shown, the indoor unit of the air conditioner has a first state. In the first state, when the indoor unit is operating, the fan component drives air into the casing 1 and outputs air to the heat exchanger 5. After the air exchanges heat with the heat exchanger 5, it flows out to the outside from the bottom air duct assembly 21. The indoor unit also has an air guide structure disposed between the heat exchanger 5 and the fan component. The air guide structure is used to divide the air output by the fan component into two streams and guide them to the first heat exchange section 51 and the second heat exchange section 52, respectively. In this embodiment, by setting the air guide structure, when the indoor unit is in the first state, the air guide structure divides the air output by the fan component into two streams and guides them to the first heat exchange section 51 and the second heat exchange section 52, respectively, thereby making the heat exchange of the heat exchanger more uniform and improving the heat exchange efficiency.

[0052] In some embodiments, such as Figures 1 to 6 As shown, the air guiding structure includes a V-shaped air guide 7 with its opening facing the heat exchanger 5. The opening of the V-shaped air guide 7 covers the interconnected ends of the first heat exchange section 51 and the second heat exchange section 52. In this embodiment, the air guiding structure is designed as a V-shape, which can better match the inverted V-shaped structure of the heat exchanger 5 and achieve a more suitable air guiding effect. In the embodiment shown, the windward surface of the V-shaped air guide 7 is designed as a streamlined shape, which can further improve the air guiding effect.

[0053] In some embodiments, such as Figures 1 to 6As shown, the air outlet component also includes a top air duct assembly 22 located at the upper end of the housing 1, and the fan component includes a mounting bracket 34 rotatably mounted relative to the housing 1, a drive component drivenly connected to the mounting bracket 34, and a cross-flow fan mounted on the mounting bracket 34. A cross-flow fan, also known as a cross-flow fan, was proposed by the French engineer Mortier in 1892. Its impeller is multi-bladed, long cylindrical, with forward-curving multi-bladed blades. The structure of a cross-flow fan includes an impeller, a baffle wall (sometimes referred to as a volute, air duct wall, etc.), and a volute tongue. The baffle wall partially blocks the outer circumference of the impeller, and the volute tongue separates the inlet and outlet sides of the impeller's outer circumference. This causes the vortex center of the vortex entering the impeller to move closer to the volute tongue. Therefore, when the impeller rotates, the airflow enters from the inlet side of the impeller's outer circumference that is not blocked by the baffle wall, passes through the interior of the impeller, and exits from the outlet side between the baffle wall and the volute tongue, forming the working airflow. The baffle wall and volute are both important working components of the cross-flow fan. The cross-flow fan includes an impeller 31 mounted on a mounting bracket 34 and baffle walls 33 and volutes 32 arranged opposite each other on both sides of the fan section for air outlet from the impeller 31. The indoor unit of the air conditioner has a first state and a second state. In the first state, the outlet of the air duct formed by the baffle walls 33 and volutes faces the bottom air duct assembly 21. In the second state, the outlet of the air duct formed by the baffle walls 33 and volutes 32 faces the top air duct assembly 22. A drive unit is used to drive the mounting bracket 34 to rotate relative to the housing 1, thereby switching the indoor unit of the air conditioner between the first and second states. In this embodiment, the baffle walls 33, impeller 31, and volutes 32 are all mounted on the mounting bracket, and the mounting bracket 34 can rotate relative to the housing, for example... Figure 1 The fan rotates around the pivot 341, thereby causing the shielding wall 33, the volute tongue 32, and the impeller 31 to rotate as a whole. When the air outlet duct formed by the shielding wall 33 and the volute tongue 32 faces the bottom air outlet assembly 21, the fan component is in the first state, as shown. Figure 3 and Figure 6 As shown, the cross-flow fan draws in air from the top air duct assembly 22 and delivers air to the bottom air duct assembly 21 through the air outlet duct formed by the baffle wall 33 and the volute tongue 32. When the air outlet duct formed by the baffle wall 33 and the volute tongue 32 faces the top air duct assembly 22, the fan component is in the second state, as shown. Figure 2 and Figure 5As shown, the cross-flow fan draws in air from the bottom air duct assembly 2 and delivers air to the top air duct assembly 22 through the air outlet duct formed by the baffle wall 33 and the volute tongue 32. Since the top air duct assembly 22 and the bottom air duct assembly 2 are located at the upper and lower ends of the casing respectively, the indoor unit of this embodiment can switch between discharging air to the upper end and discharging air to the lower end of the casing. When the indoor unit of the air conditioner is cooling or heating, the cold air density is high, and the cold air blows downwards, which can easily lead to cold feet and a hot head, resulting in an uncomfortable experience. In this embodiment, the indoor unit of the air conditioner can switch between the first and second states when cooling and heating, so that when cooling, the cold air can be output from the upper end, not blowing directly on people, and the cold air can sink downwards under the action of gravity, providing a more comprehensive cooling effect and making the cooling more comfortable. When heating, the hot air is output from the lower end, and the hot air density is low, so it can rise, improving the uniformity of heating and achieving a more comprehensive heating effect.

[0054] In some embodiments, such as Figures 1 to 6As shown, the air outlet component also includes a first extension wall 231 and a second extension wall 232. One end of the first extension wall 231 and the second extension wall 232 is fixedly connected to the top air duct assembly 22. In the second state, the outlet end of the volute tongue 32 is aligned with the end of the first extension wall 231 away from the top air duct assembly 22, and the outlet end of the shielding wall 33 is aligned with the end of the second extension wall 232 away from the top air duct assembly 22. The volute tongue 32, the shielding wall 33, the first extension wall 231 and the second extension wall 232 form an air duct that supplies air to the top air duct assembly 22. The alignment of the outlet end of the volute tongue 32 with the end of the first extension wall 231 away from the top air duct assembly 22 means that the outlet end of the volute tongue 32 is directly connected to the end of the first extension wall 231 away from the top air duct assembly 22, or when there is a gap between them, the extension direction of the outlet end of the volute tongue 32 is the same as the extension direction of the end of the first extension wall 231 away from the top air duct assembly 22. Similarly, the alignment of the outlet end of the shielding wall 33 with the end of the second extension wall 232 away from the top air duct assembly 22 means that the outlet end of the shielding wall 33 is directly connected to the end of the second extension wall 232 away from the top air duct assembly 22, or when there is a gap between them, the extension direction of the outlet end of the shielding wall 33 is the same as the extension direction of the end of the second extension wall 232 away from the top air duct assembly 22. Thus, in the second state, the volute tongue 32, the shielding wall 33, the first extension wall 231, and the second extension wall 232 can form an air duct that directly supplies air to the top air duct assembly 22. In this embodiment, by setting a first extension wall 231 and a second extension wall 232, in the second state, the outlet end of the volute tongue and the shielding wall of the cross-flow fan faces the top air duct assembly 22. The first extension wall 231 and the second extension wall 232 can guide the airflow more efficiently, improving the airflow efficiency. In the first state, the outlet end of the volute tongue and the shielding wall of the cross-flow fan faces the heat exchanger. Since the heat exchanger is close, it is not necessary to set an extension wall to achieve efficient airflow to the heat exchanger. Thus, the structure switching between "long shielding wall and long volute tongue" and "short shielding wall and short volute tongue" is realized in the second state and the first state, realizing efficient and accurate airflow of the cross-flow fan, improving the airflow utilization efficiency, and the structure is compact and efficient.

[0055] In some embodiments, the top air duct assembly 22 includes a first air vent 221, a second air vent 222, a first air guide plate assembly for closing and opening the first air vent 221, and a second air guide plate assembly for closing and opening the second air vent. One end of the first extension wall 231 and the second extension wall 232 are respectively connected to both ends of the first air vent. In a second state, the volute tongue 32, the shielding wall 33, the first extension wall 231, and the second extension wall 232 form an air duct for supplying air to the first air vent 221. In the embodiment shown in the figure, the first air guide plate assembly includes two rotatable air guide plates, which respectively control the opening or closing of a portion of the first air vent 221. The opening or closing of the first air vent 221 can be achieved by rotating the two air guide plates. In the embodiment shown in the figure, the second air guide plate assembly includes one air guide plate. In the second state of this embodiment, the cross-flow fan discharges air to the top air duct assembly 22. Since the airflow from the cross-flow fan is relatively concentrated, a single air outlet is sufficient to meet the airflow requirements. That is, only the first air outlet 221 and the first air guide plate assembly need to be opened to achieve efficient airflow. In the first state, the top air duct assembly 22 serves as the air inlet side of the cross-flow fan. Both the first and second air guide plate assemblies are open, thereby utilizing the first and second air outlets to provide airflow for the cross-flow fan. This better meets the large-area airflow requirements of the cross-flow fan, meaning this embodiment better meets both the airflow discharge requirements of the cross-flow fan in the second state and the airflow intake requirements in the first state.

[0056] In some embodiments, the indoor unit of the air conditioner further includes a third extension wall 233 disposed within the housing 1 and connected at one end to the housing 1. The top air duct assembly 22 is located between the first extension wall 231 and the third extension wall 233. In the second state, the distance between the end of the outlet of the shielding wall 33 away from the inverted V-shaped structure and the end of the third extension wall 233 away from the housing 1 is less than a first preset distance to block the air flowing in from the bottom air duct from flowing between the shielding wall 33 and the third extension wall 233. In the second state, the distance between the end of the shielding wall 33 away from the outlet end of the inverted V-shaped structure and the end of the third extension wall 233 away from the housing 1 is less than a first preset distance. This distance can be 0 or a small distance. The first preset distance can thus be set to a value close to 0 or a small value, so that in the second state, when the distance between the shielding wall and the third extension wall 233 is less than the first preset distance, the shielding wall and the third extension wall 233 can completely block the airflow or block most of the airflow. The smaller the value of the first preset distance, the better the blocking effect. The specific selection of the first preset value can be set according to the desired blocking effect. In this embodiment, by setting the third extension wall 233, in the second state, the third extension wall and the shielding wall 33 can deliver more air from the bottom air duct assembly to the air inlet side of the cross-flow fan, preventing air from passing between the third extension wall and the shielding wall, thereby improving the air intake efficiency of the cross-flow fan.

[0057] In some embodiments, such as Figures 1 to 6 As shown, the volute tongue 32 has a U-shaped structure. The volute tongue 32 includes a first plate and a second plate located at both ends, and an intermediate plate arranged circumferentially along the impeller 31 connecting the first plate and the second plate. In the second state, as shown... Figure 2 and Figure 5 As shown, the distance between the free end of the first plate and the first extension wall 231 is less than the second preset distance to block wind from flowing between the free end of the first plate and the first extension wall 231. In the first state, the distance between the free end of the second plate and the third extension wall 233 is less than the third preset distance to block wind from flowing between the free end of the third plate and the third extension wall 233. The selection methods for the values ​​of the second and third preset distances are similar to the selection method for the first preset distance. In this embodiment, by designing the volute tongue as a U-shaped structure, the requirements of the second preset distance and the third preset distance in the second state can be met. Thus, in the second state, the volute tongue and the first extension wall can guide more of the airflow from the cross-flow fan to the top air duct assembly, improving the airflow efficiency. In the first state, more of the airflow from the top air duct assembly is introduced into the air inlet side of the cross-flow fan, improving the air inlet efficiency of the cross-flow fan.

[0058] In some embodiments, the indoor unit of the air conditioner is a wall-mounted air conditioner. In this embodiment, the heat exchanger, fan assembly, and bottom air duct assembly of the wall-mounted air conditioner are all arranged vertically. That is, when the wall-mounted air conditioner is installed on the wall, the bottom air duct, heat exchanger, and fan assembly are arranged vertically. This reduces the horizontal dimensions of the wall-mounted air conditioner, i.e., reduces its width, thereby facilitating the layout of the wall-mounted air conditioner, reducing the horizontal space occupied, and also making it more aesthetically pleasing.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: Shell (1); The air vent component includes a bottom air duct assembly (21) located at the lower end of the housing (1). A heat exchanger (5) is disposed inside the housing (1) and located above the bottom air duct assembly (21). The heat exchanger (5) includes a first heat exchange section (51) and a second heat exchange section (52) connected at one end to each other. The first heat exchange section (51) and the second heat exchange section (52) form an inverted V-shaped structure with the opening facing the bottom air duct assembly (21). The fan component is located inside the housing (1) and above the heat exchanger (5); The water receiving component includes a first water receiving tray (71) and a second water receiving tray (72). The first water receiving tray (71) is located below the end of the first heat exchange section (51) away from the second heat exchange section (52) to receive condensate from that end. The second water receiving tray (72) is located below the end of the second heat exchange section (52) away from the first heat exchange section (51) to receive condensate from that end. During the air supply operation, the air flows through the bottom air duct assembly (21), the fan component drives the air into the housing (1), and the air exchanges heat with the heat exchanger (5) during the flow within the housing (1).

2. The air conditioner indoor unit as described in claim 1, characterized in that, It also includes a drain pipe located at the lower end of the housing (1), the drain pipe being connected to the first water receiving tray (71) and the second water receiving tray (72).

3. The air conditioner indoor unit as described in claim 1, characterized in that, The air conditioner indoor unit has a first state. In the first state, when the air conditioner indoor unit is working, the fan component drives the air into the housing (1) and outputs the air to the heat exchanger (5). After the air exchanges heat with the heat exchanger (5), it flows out to the outside from the bottom air duct assembly (21). The air conditioner indoor unit also has an air guide structure disposed between the heat exchanger (5) and the fan component. The air guide structure is used to divide the air output by the fan component into two streams to be directed to the first heat exchange section (51) and the second heat exchange section (52) respectively.

4. The air conditioner indoor unit as described in claim 3, characterized in that, The air guide structure includes a V-shaped air guide with an opening facing the heat exchanger (5), and the opening of the V-shaped air guide covers the interconnected ends of the first heat exchange section (51) and the second heat exchange section (52).

5. The air conditioner indoor unit as described in claim 1, characterized in that, The air outlet component also includes a top air duct assembly (22) located at the upper end of the housing (1). The fan component includes a mounting bracket (34) rotatably disposed relative to the housing (1), a drive component drivenly connected to the mounting bracket (34), and a cross-flow fan mounted on the mounting bracket (34). The cross-flow fan includes an impeller (31) mounted on the mounting bracket (34) and baffles (33) and volutes (32) arranged opposite to each other on both sides of the fan for air outlet of the impeller (31). The air-conditioned room The indoor unit has a first state and a second state. In the first state, the outlet of the air duct of the cross-flow fan formed by the shielding wall (33) and the volute tongue faces the bottom air duct assembly (21). In the second state, the outlet of the air duct of the cross-flow fan formed by the shielding wall (33) and the volute tongue (32) faces the top air duct assembly (22). The drive member is used to drive the mounting bracket (34) to rotate relative to the housing (1) so that the air conditioning indoor unit switches between the first state and the second state.

6. The air conditioner indoor unit as described in claim 5, characterized in that, The air outlet component further includes a first extension wall (231) and a second extension wall (232). One end of the first extension wall (231) and the second extension wall (232) is fixedly connected to the top air duct assembly (22). In the second state, the outlet end of the volute tongue (32) is aligned with the end of the first extension wall (231) away from the top air duct assembly (22), and the outlet end of the shielding wall (33) is aligned with the end of the second extension wall (232) away from the top air duct assembly (22). The volute tongue (32), the shielding wall (33), the first extension wall (231), and the second extension wall (232) form an air duct that supplies air to the top air duct assembly (22).

7. The air conditioner indoor unit as described in claim 6, characterized in that, The top air duct assembly (22) includes a first air vent, a second air vent, a first air guide plate assembly for closing and opening the first air vent, and a second air guide plate assembly for closing and opening the second air vent. One end of the first extension wall (231) and the second extension wall (232) are respectively connected to the two ends of the first air vent. In the second state, the volute tongue (32), the shielding wall (33), the first extension wall (231), and the second extension wall (232) form an air duct for supplying air to the first air vent.

8. The air conditioner indoor unit as described in claim 6, characterized in that, It also includes a third extension wall (233) disposed inside the housing (1) and connected to the housing (1) at one end. The top air duct assembly (22) is located between the first extension wall (231) and the third extension wall (233). In the second state, the distance between the end of the shielding wall (33) away from the heat exchanger and the end of the third extension wall (233) away from the housing (1) is less than a first preset distance to block the air flowing in from the bottom air duct assembly from flowing between the shielding wall (33) and the third extension wall (233).

9. The air conditioner indoor unit as described in claim 8, characterized in that, The volute tongue (32) has a U-shaped structure. The volute tongue (32) includes a first plate and a second plate located at both ends, and an intermediate plate arranged along the circumference of the impeller (31) connecting the first plate and the second plate. In the second state, the distance between the free end of the first plate and the first extension wall (231) is less than a second preset distance to block the wind from flowing between the free end of the first plate and the first extension wall (231). In the first state, the distance between the free end of the second plate and the third extension wall (233) is less than a third preset distance to block the wind from flowing between the free end of the second plate and the third extension wall (233).

10. The air conditioner indoor unit as described in claim 1, characterized in that, The indoor unit of the air conditioner is a wall-mounted air conditioner.

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