Indoor unit of air conditioner

Abstract

The utility model discloses an air conditioner indoor unit which comprises a shell. A heat exchanger; the cross-flow fan comprises an impeller, a reversing plate, a driving part, a first volute tongue and a second volute tongue, wherein the first volute tongue and the second volute tongue are arranged on the two opposite sides of the impeller; in the first state, the first end of the reversing plate is connected with the first volute tongue, the reversing plate and the first volute tongue form a shielding wall, and the reversing plate, the first volute tongue and the second volute tongue form a first air duct for air outlet of the impeller; in the second state, the second end of the reversing plate is connected with the second volute tongue, the reversing plate is opposite to the first volute tongue, the reversing plate and the second volute tongue form a shielding wall for shielding part of the air inlet face of the impeller, and the reversing plate, the second volute tongue and the first volute tongue form a second air channel for air outlet of the impeller; the air outlet direction of the second air duct is from the second end of the reversing plate to the first end of the reversing plate; the air outlet direction of the first air channel is different from that of the second air channel, and the driving device drives the reversing plate to act relative to the shell so that the air conditioner indoor unit can be switched between the first state and the second state.

Description

Technical Field

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

[0002] With the technological advancements in the air conditioning indoor unit industry, people have higher expectations for the user experience of air conditioning indoor units. Currently, most mainstream air conditioning indoor units share the same air duct for both cooling and heating. This results in a limited airflow range. During cooling, because the cold air is denser and blows downwards, it causes a feeling of cold feet and a hot head, leading to discomfort. Most current methods for switching the airflow direction between cooling and heating involve adding a rotating lower air guide plate to achieve downward hot air delivery and horizontal cold air delivery, but these methods do not significantly improve the airflow range. Utility Model Content

[0003] The purpose of this utility model is to provide a compact air conditioning indoor unit with multiple air outlet directions.

[0004] This utility model discloses an indoor unit for an air conditioner, having a first state and a second state, including:

[0005] case;

[0006] A heat exchanger is mounted on the shell.

[0007] A cross-flow fan, mounted on the housing, includes an impeller, a reversing plate movably disposed relative to the housing, a driving member for driving the reversing plate to move relative to the housing, and a first volute and a second volute arranged on opposite sides of the impeller.

[0008] In the first state, the first end of the reversing plate is connected to the first volute tongue, the reversing plate is opposite to the second volute tongue, and the reversing plate and the first volute tongue form a shielding wall that partially blocks the air inlet surface of the impeller. The reversing plate, the first volute tongue, and the second volute tongue form a first air duct for air outlet from the impeller, and the air outlet direction of the first air duct is along the first end of the reversing plate to the second end of the reversing plate. In the second state, the second end of the reversing plate is connected to the second volute tongue, the reversing plate is opposite to the first volute tongue, the reversing plate and the second volute tongue form a shielding wall that partially blocks the air inlet surface of the impeller, and the reversing plate, the second volute tongue, and the first volute tongue form a second air duct for air outlet from the impeller, and the air outlet direction of the second air duct is along the second end of the reversing plate to the first end of the reversing plate. The air outlet directions of the first air duct and the second air duct are different. The driving device drives the reversing plate to move relative to the housing to switch the indoor unit of the air conditioner between the first state and the second state.

[0009] In some embodiments, the reversing plate includes a first plate and a second plate hinged relative to the housing, the first plate and the second plate having the same hinge axis relative to the housing, and the driving device includes a first driving member that drives the first plate and a second driving member that drives the second plate. The first driving member drives the first plate to rotate relative to the housing, and the second driving member drives the second plate to rotate relative to the housing, so that the indoor unit of the air conditioner switches between a first state and a second state.

[0010] In some embodiments, the surface of the first plate facing the impeller is an arc-shaped surface, and the surface of the second plate facing the impeller is an arc-shaped surface. In both the first state and the second state, the surfaces of the first plate facing the impeller and the second plate facing the impeller are tangent.

[0011] In some embodiments, both the first volute and the second volute include an L-shaped bending plate, the L-shaped bending plate including a first sub-plate and a second sub-plate connected to each other, the first sub-plate being disposed around the outer peripheral surface of the impeller, and the second sub-plate extending away from the outer peripheral surface of the impeller; in a first state, the first end of the reversing plate is connected to the first sub-plate of the first volute, and the second end of the reversing plate and the second sub-plate of the second volute are opposite to each other and form opposite air duct walls of the first air duct; in a second state, the first end of the reversing plate is connected to the first sub-plate of the second volute, and the second end of the reversing plate and the second sub-plate of the first volute are opposite to each other and form opposite air duct walls of the second air duct.

[0012] In some embodiments, the cross-flow fan further includes an extension plate movable relative to the housing. In the first state, the extension plate blocks part of the air inlet surface of the impeller and is sealed to the first sub-plate of the first volute tongue. When switching from the first state to the second state, the extension plate opens to block part of the air inlet surface of the impeller.

[0013] In some embodiments, the growth plate is hinged to the end of the first sub-plate of the first volute tongue that is away from the second sub-plate, and the growth plate rotates relative to the first sub-plate when switching between the first state and the second state.

[0014] In some embodiments, the cross-flow fan further includes a guide vane, the guide vane being at an angle opposite to the first sub-plate and the second sub-plate of the first volute tongue, and the guide surface of the guide vane being used to guide the air to the air inlet surface of the impeller.

[0015] In some embodiments, the air guide plate includes a guide plate and a limiting plate. The guide plate is at an angle opposite to the first sub-plate and the second sub-plate of the first volute tongue. The air guiding surface of the air guide plate is disposed on the guide plate. In the second state, the limiting plate contacts the growth plate to limit the growth plate, and the distance between the growth plate and the central axis of the impeller is not greater than the distance between the air guiding surface and the central axis of the impeller.

[0016] In some embodiments, the first volute tongue and / or the second volute tongue are rotatable relative to the central axis of the impeller.

[0017] In some embodiments, the heat exchanger includes a first heat exchange section, a second heat exchange section, and a third heat exchange section arranged and connected in sequence around the impeller.

[0018] In some embodiments, the indoor unit of the air conditioner includes a wall-mounted air conditioner, wherein the air outlet direction of the first air duct and the air outlet direction of the second air duct are respectively upward and downward.

[0019] Based on the wall-mounted indoor air conditioner unit provided by this utility model, by setting a first volute and a second volute on both sides of the impeller and setting a reversing plate that is movable relative to the housing, in the first state the reversing plate is connected to the first volute to form a shielding wall that blocks the impeller and forms a first air duct, and in the second state the reversing plate is connected to the second volute to form a shielding wall that blocks the impeller and forms a second air duct with a different air outlet direction from the first air duct, the indoor air conditioner unit can achieve multiple air outlet directions, and at the same time, the structure of the indoor air conditioner unit is simpler and more compact.

[0020] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the indoor unit of the air conditioner according to an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 The diagram shown is a partial structural diagram of the indoor unit of the air conditioner.

[0024] Figure 3 for Figure 2 A schematic diagram of another state of the structure shown;

[0025] Figure 4 A schematic diagram of a portion of the structure of the indoor unit of an air conditioner according to another embodiment of this utility model;

[0026] Figure 5 A schematic diagram of the structure of the first or second volute of the indoor unit of an air conditioner according to another embodiment of this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, 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 utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this 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 drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the 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 utility model.

[0030] In the description of this utility model, 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 utility model based on the specific circumstances.

[0031] 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.

[0032] like Figures 1 to 4 As shown, the indoor unit of the air conditioner in this embodiment has a first state and a second state. The indoor unit of the air conditioner includes a housing 1, a heat exchanger 2, and a cross-flow fan.

[0033] The heat exchanger 2 is mounted on the housing 1. "Mounted on the housing 1" means it is installed on the housing and can be located inside, outside, or partially inside and partially outside the housing 1. Refrigerant is introduced into the heat exchanger 2 to exchange heat with the air passing through it. When the indoor unit of the air conditioner is cooling, the heat exchanger 2 acts as an evaporator for the refrigerant; when the indoor unit is heating, the heat exchanger 2 acts as a condenser for the refrigerant. In some embodiments shown in the figures, the heat exchanger is located on the air inlet side of the cross-flow fan. The air entering the cross-flow fan first passes through the heat exchanger, then enters the fan, and finally exits. In some embodiments not shown in the figures, the heat exchanger is located on the air outlet side of the cross-flow fan. The air exiting the fan then passes through the heat exchanger, exchanges heat with it, and is then output.

[0034] A cross-flow fan, also known as a cross-flow fan, was proposed by the French engineer Mortier in 1892. Its impeller is a multi-bladed, long cylindrical shape with forward-curving multi-bladed blades. The structure of a cross-flow fan includes the impeller, volute, and volute tongue. The volute forms a shielding wall around the impeller, partially obscuring its outer circumference. The volute tongue separates the inlet and outlet sides of the impeller's outer circumference, causing the vortex center of the airflow entering the impeller to move closer to the volute tongue. Therefore, when the impeller rotates, the airflow enters from the unobstructed inlet side of the impeller's outer circumference, passes through the impeller's interior, and exits from the outlet side between the shielding wall and the volute tongue, forming the working airflow.

[0035] In this embodiment, the cross-flow fan is mounted on the housing 1. The cross-flow fan includes an impeller 3, a reversing plate 4 movably disposed relative to the housing 1, a driving member for driving the reversing plate 4 to move relative to the housing 1, and a first volute 51 and a second volute 52 arranged on opposite sides of the impeller 3. Figure 2 In the embodiment shown, with reference to the accompanying drawings, the first volute tongue 51 and the second volute tongue 52 are arranged on the upper and lower sides of the impeller 3.

[0036] In the first state, such as Figure 2 and Figure 4 As shown, the first end of the commutator plate 4 is connected to the first volute tongue 51. In the embodiment shown, the connection is sealed. The commutator plate 4 and the second volute tongue 52 are opposite each other. The commutator plate 4 and the first volute tongue 51 form the volute of the cross-flow fan. The commutator plate 4 and the first volute tongue 51 form a shielding wall that shields part of the air inlet surface of the impeller 3. A first air duct 421 for air outlet of impeller 3 is formed between the volute formed by the reversing plate 4 and the first volute tongue 51 and the second volute tongue 52. The air outlet direction of the first air duct 421 is along the first end of the reversing plate 4 to the second end of the reversing plate 4. The outer peripheral surface of the impeller is also the air inlet surface of the impeller. Under the blocking effect of the volute formed by the reversing plate 4 and the first volute tongue 51 on part of the air inlet surface of the impeller, the air enters the cross-flow fan from the unblocked air inlet surface of the impeller and flows out from the first air duct 421 between the volute formed by the reversing plate 4 and the first volute tongue 51 and the second volute tongue. When flowing through the reversing plate, the air outlet direction is along the first end of the reversing plate 4 to the second end of the reversing plate 4.

[0037] In the second state, the second end of the reversing plate 4 is connected to the second volute 52, which is a sealed connection in the embodiment shown in the figure. The reversing plate 4 is opposite to the first volute 51, and the reversing plate 4 and the second volute 52 form the volute of the cross-flow fan. The reversing plate 4 and the second volute 52 form a shielding wall that blocks part of the air inlet surface of the impeller 3. The reversing plate 4, the second volute 52 and the first volute 51 form a second air duct 422 for the air outlet of the impeller 3. The air outlet direction of the second air duct 422 is along the second end of the reversing plate 4 to the first end of the reversing plate 4. Under the shielding effect of the volute formed by the reversing plate 4 and the second volute 51 on part of the air inlet surface of the impeller, after the air enters the cross-flow fan from the unblocked air inlet surface of the impeller, it flows out from the first air duct 422 between the volute formed by the reversing plate 4 and the second volute 52 and the first volute. When flowing through the reversing plate, the air outlet direction is along the second end of the reversing plate 4 to the first end of the reversing plate 4.

[0038] The air outlet directions of the first air duct 421 and the second air duct 422 are different. For example, when the indoor unit of the air conditioner is installed and working, the air outlet directions of the first air duct 421 and the second air duct 422 can be one pointing downwards and the other pointing horizontally or upwards. The drive device drives the reversing plate to move relative to the housing 1, thereby switching the indoor unit of the air conditioner between a first state and a second state. The drive device drives the reversing plate to move, causing the reversing plate to switch between a position connected to the first volute tongue and a position connected to the second volute tongue, thus switching the indoor unit of the air conditioner to the first state or the second state.

[0039] The wall-mounted indoor unit of this embodiment of the air conditioner has multiple air outlet directions. By setting a first volute 51 and a second volute 52 on both sides of the impeller 3 and setting a reversing plate 4 that is movable relative to the housing 1, the reversing plate 4 is connected to the first volute 51 in a first state to form a shielding wall that blocks the impeller 3 and forms a first air duct 421. In a second state, the reversing plate 4 is connected to the second volute 52 to form a shielding wall that blocks the impeller 3 and forms a second air duct 422 with a different air outlet direction than the first air duct 421. The indoor unit of the air conditioner can select different air outlet directions when cooling and heating, so that a more suitable air outlet direction can be selected under different operating conditions of cooling and heating, thereby improving the comfort of the air outlet of the indoor unit. At the same time, the structure of the indoor unit of the air conditioner is also simpler and more compact.

[0040] In some embodiments, such as Figures 2 to 4As shown, the commutator 4 includes a first plate 41 and a second plate 42 hinged relative to the housing 1. The hinge axes of the first plate 41 and the second plate 42 relative to the housing 1 are the same. The driving device includes a first driving member that drives the first plate 41 and a second driving member that drives the second plate 42. The first driving member drives the first plate 41 to rotate relative to the housing 1, and the second driving member drives the second plate 42 to rotate relative to the housing 1, so that the indoor unit of the air conditioner switches between a first state and a second state. The first driving member and the second driving member may include a crank-rocker mechanism, a crank-connecting rod mechanism, etc., and the power source may be a drive motor. In this embodiment, by setting the commutator 4 to include two rotatable plates, the position of the commutator can be adjusted more flexibly by rotating the two plates. This allows for a more reliable connection between the commutator and the volute tongue in both the first and second states. At the same time, a more flexible connection relationship can also be formed between the first plate 41 and the second plate 42 in both the first and second states. For example, the surface of the first plate 41 for air passage and the surface of the second plate 42 for air passage can be tangent to reduce airflow resistance. The first plate 41 and the second plate 42 have the same hinge axis, so when the first plate 41 and the second plate 42 rotate relative to the hinge axis, the first plate 41 and the second plate 42 can more easily maintain a sealed connection, that is, the first plate 41 and the second plate 42 always maintain a movable sealed connection at the hinge axis, thereby improving the air outlet efficiency.

[0041] In some embodiments, as shown in the figure, the surface of the first plate 41 facing the impeller 3 is an arc-shaped surface, and the surface of the second plate 42 facing the impeller 3 is an arc-shaped surface. In both the first and second states, the surfaces of the first plate 41 and the second plate 42 facing the impeller 3 are tangent. By setting both the surfaces of the first plate 41 and the second plate 42 facing the impeller 3 to arc-shaped surfaces, and ensuring that the two arc-shaped surfaces are always tangent in both the first and second states, this embodiment reduces the flow resistance of the airflow from the cross-flow fan as it passes through the first and second plates, thereby further improving the airflow efficiency of the cross-flow fan.

[0042] In some embodiments, such as Figures 2 to 5As shown, both the first volute tongue 51 and the second volute tongue 52 include L-shaped bent plates. The L-shaped bent plates include a first sub-plate 531 and a second sub-plate 532 connected to each other. The first sub-plate 531 is arranged around the outer peripheral surface of the impeller 3, and the second sub-plate 532 extends away from the outer peripheral surface of the impeller 3. In the embodiment shown in the figure, the first sub-plate 531 blocks part of the air inlet surface of the impeller, that is, forms a shielding wall of the impeller, while the second sub-plate 532 does not block the air inlet surface of the impeller. In the first state, the first end of the commutator plate 4 is connected to the first sub-plate 531 of the first volute tongue 51. Preferably, the surface of the first end of the commutator plate 4 for airflow and the surface of the first sub-plate 531 of the first volute tongue facing the impeller are tangent. The second end of the commutator plate 4 and the second sub-plate 532 of the second volute tongue 52 are opposite to each other and form opposite air duct walls of the first air duct 421. At the downstream end of the first air duct, that is, at the second end of the commutator plate 4, the second end of the commutator plate 4 and the second sub-plate of the second volute tongue 52 form opposite sides of the air duct walls of the first air duct 421 in the first state. That is, the airflow is between the second sub-plate of the second volute tongue and the second end of the commutator plate. In the first state, the second sub-plate of the first volute tongue 52 is located on the side of the reversing plate away from the impeller, and the second sub-plate of the first volute tongue does not guide the airflow out of the impeller. In the second state, the first end of the reversing plate 4 is connected to the first sub-plate 531 of the second volute tongue 52. Preferably, the surface of the second end of the reversing plate 4 for airflow and the surface of the first sub-plate 531 of the second volute tongue facing the impeller are tangent. The second end of the reversing plate 4 and the second sub-plate 532 of the first volute tongue 51 are opposite to each other and form the opposing air duct wall of the second air duct 422. In this state, the second sub-plate of the second volute tongue is located on the side of the reversing plate away from the impeller, and the second sub-plate of the second volute tongue does not guide the airflow out of the impeller. In this embodiment, by setting the first volute tongue 51 and the second volute tongue 52 as L-shaped bent plates, in the first state, the first volute tongue can better separate the airflow inlet side and the airflow outlet side of the impeller, and in the second state, the second volute tongue can better separate the airflow inlet side and the airflow outlet side of the impeller, thereby improving the airflow efficiency of the impeller. Meanwhile, when the impeller discharges air, the second sub-plate opposite the commutator plate can also form an air duct wall with the commutator plate to guide the air discharge, further improving the air discharge efficiency while making the structure more compact.

[0043] In some embodiments, such as Figures 2 to 4As shown, the cross-flow fan also includes an extension plate 6 that is movable relative to the housing 1. In the first state, the extension plate 6 blocks part of the air inlet surface of the impeller 3 and is sealed to the first sub-plate 531 of the first volute 51. When switching from the first state to the second state, the extension plate 6 opens to block part of the air inlet surface of the impeller 3. In this embodiment, in the first state, the extension plate 6 blocks part of the air inlet surface of the impeller. The extension plate, the first sub-plate of the first volute, and the reversing plate together form the volute of the cross-flow fan, forming a shielding wall for part of the air inlet surface of the impeller. That is, the extension plate can extend the length of the shielding wall in the first state. By adjusting the length, the vortex core of the vortex of the wind entering the impeller can be guided, thereby improving the air outlet efficiency in the first state. Since the extension plate is movable relative to the housing, in the second state, the extension plate does not block the air inlet surface of the impeller, thereby increasing the area of ​​the air inlet surface of the impeller, increasing the air intake volume of the impeller, and improving the air intake and exhaust efficiency of the cross-flow fan.

[0044] In some embodiments, such as Figures 2 to 4 As shown, the growth plate 6 is hinged to the end of the first sub-plate 531 of the first volute 51 away from the second sub-plate 532. When switching between the first and second states, the growth plate 6 rotates relative to the first sub-plate 531. In this embodiment, by hinged the growth plate to the end of the first sub-plate of the first volute, the growth plate 6 can achieve a better sealing connection with the first sub-plate, which is more conducive to ensuring the air outlet effect of the cross-flow fan in the first state.

[0045] In some embodiments, such as Figure 2 and Figure 3 As shown, the cross-flow fan also includes a guide plate 7. The guide plate 7 is angled relative to the first sub-plate 531 and the second sub-plate 532 of the first volute 51. The guide surface of the guide plate 7 is used to guide the air to the air inlet surface of the impeller 3. In this embodiment, since the first volute is an L-shaped bent plate, the airflow to the impeller near the first volute will be blocked by the L-shaped bent plate, thus hindering the airflow to the impeller. In this embodiment, by setting the guide plate 7, which is angled relative to the first sub-plate 531 and the second sub-plate 532 of the first volute 51, the airflow is guided to the air inlet surface of the impeller, thereby avoiding or reducing the obstruction of the airflow by the angle between the first sub-plate 531 and the second sub-plate 532, and improving the airflow efficiency of the impeller.

[0046] In some embodiments, as shown in the figure, the air guide plate 7 includes a guide plate 71 and a limiting plate 72. The guide plate 71 is at an angle opposite to the first sub-plate 531 and the second sub-plate 532 of the first volute tongue 51. The air guiding surface of the air guide plate 7 is disposed on the guide plate 71. In the second state, as shown... Figure 3As shown, the limiting plate 72 contacts the growth plate 6 to limit the growth plate 6, and the distance between the growth plate 6 and the central axis of the impeller 3 is not greater than the distance between the air guide surface and the central axis of the impeller 3. In this embodiment, the air guide plate 7 can guide the air intake, avoid or reduce the obstruction of the air intake by the angle between the first sub-plate 531 and the second sub-plate 532, and improve the air intake efficiency of the impeller. The setting of the limiting plate 72 can limit the rotation of the growth plate in the second state, so that the growth plate is limited to a suitable position. Since the distance between the growth plate 6 and the central axis of the impeller 3 in the second state is not greater than the distance between the air guide surface and the central axis of the impeller 3, the growth plate 6 will not block the air guide surface of the guide plate from the air intake of the impeller. The air intake through the air guide surface of the guide plate can flow directly to the air intake surface of the impeller or enter the air intake surface of the impeller along the guide plate 6, thereby improving the air intake direction and effectively improving the air intake efficiency of the impeller.

[0047] In some embodiments, the first volute tongue 51 and / or the second volute tongue 52 are rotatable relative to the central axis of the impeller 3. This embodiment, by setting the first volute tongue 51 and / or the second volute tongue 52 to be rotatable relative to the central axis of the impeller 3, for example, allows the first volute tongue 51 to be rotatable, enabling adjustment of its position and thus the size of the air inlet surface between the first volute tongue and the impeller's air inlet surface. For instance, in the first state, the first volute tongue primarily functions as a volute casing baffle, while in the second state it functions as a volute tongue. The gap between the first volute tongue and the impeller's air inlet surface can be adjusted in different states, allowing the first volute tongue to better fulfill its function in each state.

[0048] In some embodiments, such as Figures 2 to 3 As shown, the heat exchanger 2 includes a first heat exchange section 21, a second heat exchange section 22, and a third heat exchange section 23 that surround the impeller 3 and are connected in sequence. In this embodiment, by setting a heat exchanger formed by three heat exchange sections, the shape and position of the heat exchanger can be set more flexibly, the arrangement can be flexible and diverse, and a larger area of ​​coverage can be formed for the air intake of the impeller 3, further improving the heat exchange efficiency of the air.

[0049] In some embodiments, the indoor unit of the air conditioner includes a wall-mounted air conditioner, with the air outlet direction of the first air duct 421 facing upwards and the air outlet direction of the second air duct 422 facing downwards, respectively. In this embodiment, "upper" and "lower" refer to being above or below a horizontal plane; that is, "upper" includes both vertically upwards and diagonally upwards, and "lower" includes both vertically downwards and diagonally downwards. Figure 2 and Figure 3In the illustrated embodiment, the air outlet directions of the first and second air ducts are diagonally upward and diagonally downward, respectively. In this embodiment, when the wall-mounted air conditioner is cooling, the cold air is output from above, avoiding direct airflow onto people. Furthermore, the cold air sinks downward under gravity, providing a good cooling effect and greater comfort. When heating, hot air is output from the lower air duct. The low density of hot air allows it to rise, improving the uniformity of heating and achieving a better heating effect.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model 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 this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An indoor unit for an air conditioner, characterized in that, It has a first state and a second state, including: Shell (1); A heat exchanger (2) is disposed on the shell (1); A cross-flow fan, mounted on the housing (1), includes an impeller (3), a reversing plate (4) movably disposed relative to the housing (1), a drive device for driving the reversing plate (4) to move relative to the housing (1), and a first volute (51) and a second volute (52) arranged on opposite sides of the impeller (3). In the first state, the first end of the commutator plate (4) is connected to the first volute tongue (51), the commutator plate (4) is opposite to the second volute tongue (52), the commutator plate (4) and the first volute tongue (51) form a shielding wall that blocks part of the air inlet surface of the impeller (3), the commutator plate (4), the first volute tongue (51) and the second volute tongue (52) form a first air duct (421) for the air outlet of the impeller (3), the air outlet direction of the first air duct (421) is along the first end of the commutator plate (4) to the second end of the commutator plate (4); in the second state, the second end of the commutator plate (4) is connected to the second volute tongue (52), the commutator plate (4) Opposite to the first volute (51), the reversing plate (4) and the second volute (52) form a shielding wall that blocks part of the air inlet surface of the impeller (3). The reversing plate (4), the second volute (52) and the first volute (51) form a second air duct (422) for the air outlet of the impeller (3). The air outlet direction of the second air duct (422) is along the second end of the reversing plate (4) to the first end of the reversing plate (4). The air outlet direction of the first air duct (421) and the air outlet direction of the second air duct (422) are different. The driving device drives the reversing plate to move relative to the housing (1) so that the indoor unit of the air conditioner switches between the first state and the second state.

2. The air conditioner indoor unit as described in claim 1, characterized in that, The reversing plate (4) includes a first plate (41) and a second plate (42) hinged relative to the housing (1). The first plate (41) and the second plate (42) have the same hinge axis relative to the housing (1). The driving device includes a first driving member that drives the first plate (41) and a second driving member that drives the second plate (42). The first driving member drives the first plate (41) to rotate relative to the housing (1) and the second driving member drives the second plate (42) to rotate relative to the housing (1) so that the indoor unit of the air conditioner switches between a first state and a second state.

3. The air conditioner indoor unit as described in claim 2, characterized in that, The surface of the first plate (41) facing the impeller (3) is an arc-shaped surface, and the surface of the second plate (42) facing the impeller (3) is an arc-shaped surface. In the first state and the second state, the surfaces of the first plate (41) and the second plate (42) facing the impeller (3) are tangent.

4. The air conditioner indoor unit as described in claim 1, characterized in that, Both the first volute (51) and the second volute (52) include L-shaped bending plates. The L-shaped bending plates include a first sub-plate (531) and a second sub-plate (532) connected to each other. The first sub-plate (531) is arranged around the outer peripheral surface of the impeller (3), and the second sub-plate (532) extends away from the outer peripheral surface of the impeller (3). In a first state, the first end of the reversing plate (4) is connected to the first sub-plate (531) of the first volute (51), and the second end of the reversing plate (4) and the second sub-plate (532) of the second volute (52) are opposite to each other and form opposite air duct walls of the first air duct (421). In a second state, the first end of the reversing plate (4) is connected to the first sub-plate (531) of the second volute (52), and the second end of the reversing plate (4) and the second sub-plate (532) of the first volute (51) are opposite to each other and form opposite air duct walls of the second air duct (422).

5. The air conditioner indoor unit as described in claim 4, characterized in that, The cross-flow fan also includes an extension plate (6) that is movable relative to the housing (1). In the first state, the extension plate (6) blocks part of the air inlet surface of the impeller (3) and is sealed to the first sub-plate (531) of the first volute tongue (51). When switching from the first state to the second state, the extension plate (6) opens to block part of the air inlet surface of the impeller (3).

6. The air conditioner indoor unit as described in claim 5, characterized in that, The growth plate (6) is hinged to the end of the first sub-plate (531) of the first volute tongue (51) away from the second sub-plate (532). When switching between the first state and the second state, the growth plate (6) rotates relative to the first sub-plate (531).

7. The air conditioner indoor unit as described in claim 6, characterized in that, The cross-flow fan also includes a guide plate (7), which is at an angle opposite to the first sub-plate (531) and the second sub-plate (532) of the first volute tongue (51). The guide surface of the guide plate (7) is used to guide the air to the air inlet surface of the impeller (3).

8. The air conditioner indoor unit as described in claim 7, characterized in that, The air guide plate (7) includes a guide plate and a limiting plate. The guide plate is at an angle opposite to the first sub-plate (531) and the second sub-plate (532) of the first volute tongue (51). The air guide surface of the air guide plate (7) is provided on the guide plate. In the second state, the limiting plate contacts the growth plate (6) to limit the growth plate (6), and the distance between the growth plate (6) and the central axis of the impeller (3) is not greater than the distance between the air guide surface and the central axis of the impeller (3).

9. The indoor unit of the air conditioner as described in claim 1, characterized in that, The first volute (51) and / or the second volute (52) are rotatable relative to the central axis of the impeller (3).

10. The air conditioning indoor unit as described in any one of claims 1 to 9, characterized in that, The heat exchanger (2) includes a first heat exchange section (21), a second heat exchange section (22) and a third heat exchange section (23) arranged around the impeller (3) and connected in sequence.

11. The air conditioner indoor unit as described in any one of claims 1 to 9, characterized in that, The indoor unit of the air conditioner includes a wall-mounted air conditioner, with the air outlet direction of the first air duct (421) and the air outlet direction of the second air duct (422) facing upwards and downwards, respectively.

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