CN114963328B - Wall-mounted air conditioner indoor unit - Google Patents

Abstract

The present invention provides a wall-mounted air conditioner indoor unit, which comprises: a housing with an air outlet opening forward and downward; The outlet ends of the wall and the rear air channel wall are connected with the upper end and the lower end of the air outlet respectively, so as to direct the airflow of the casing to the air outlet; and the rear air channel wall includes a main body section and a turning section, and the turning section and the main section The air outlet ends are connected and bent downwards compared with the main body section, so that after the air flow flows out from the main body section, it bends downwards and flows along the turning section. The invention strengthens the downward blowing effect of the wall-mounted air conditioner indoor unit, and makes the downward blowing direction closer to the vertical direction.

Description

Wall-mounted air conditioner indoor unit

technical field

The invention relates to the technical field of air conditioning, in particular to a wall-mounted air conditioner indoor unit.

Background technique

When the air conditioner operates in cooling mode, the density of cold air tends to sink due to the relatively high density; when the air conditioner operates in heating mode, the density of hot air is relatively low and tends to rise. Therefore, the air conditioner needs to blow the colder air upwards as much as possible when cooling, and blow the hot air toward the ground as much as possible when heating, so that the cold or hot air can spread more evenly in the indoor space, so that the cooling and heating speed is faster and the cooling and heating effect is better. Better, the user's hot and cold experience is better.

Existing wall-mounted air-conditioning indoor units usually only have an air outlet facing the front and bottom, and various air guide structures such as air deflectors and swing leaves are used to guide the air outlet direction of the air supply airflow, so as to realize upward or downward blowing. Let the hair down. However, the current air guide structures have relatively limited air guide angles, and can only supply air obliquely upward or downward. It is still difficult for cold or hot air to reach the roof or floor area, which affects the cooling or heating effect.

Contents of the invention

The purpose of the present invention is to provide a wall-mounted air conditioner indoor unit that overcomes the above problems or at least partially solves the above problems.

The purpose of the present invention is to strengthen the down blowing effect of the wall-mounted air conditioner indoor unit, so that the down blowing direction is closer to the vertical direction.

In particular, the present invention provides a wall-mounted air conditioner indoor unit, which includes:

The housing is provided with an air outlet opening forward and downward;

The air duct includes a front air duct wall and a rear air duct wall arranged at intervals front and back, the outlet ends of the front air duct wall and the rear air duct wall are connected to the upper end and the lower end of the air outlet respectively, for directing the airflow of the housing toward the air outlet; and

The rear air duct wall includes a main body section and a turning section, the turning section connects with the air outlet end of the main section and bends downwards compared with the main section so that the airflow flows out from the main section , to bend and flow downward along the turning section.

Optionally, the turning section is a concave arc, and the axis of the arc is parallel to the transverse direction of the air outlet.

Optionally, the included angle between the air inlet direction of the turning section and the air outlet direction of the main body section is between 25° and 35°.

Optionally, the angle between the air outlet direction of the turning section and the air outlet direction of the main section is between 5° and 15°.

Optionally, the part where the main body section connects with the turning section is also a concave arc, the axis of which is parallel to the transverse direction of the air outlet, and the ratio of its diameter to the diameter of the turning section is between Between 2 and 3.

Optionally, the turning section is connected to the bottom wall of the housing through an outwardly protruding section.

Optionally, there is a circular arc transition section between the main body section and the turning section.

Optionally, the front air channel wall includes a first section extending from the upper front to the lower rear and a second section extending forward from the lower end of the first section to the upper end of the air outlet; and the second section is The arc shape is convex, and its axis is parallel to the transverse direction of the air outlet.

Optionally, the included angle between the air outlet direction and the air inlet direction of the second section is less than 45°.

Optionally, the wall-mounted air conditioner indoor unit further includes a wind deflector, and the wind deflector includes:

The wind deflector body is rotatably arranged at the air outlet;

The multi-layer inner wind deflector is arranged on the inner side of the wind deflector body, and is fixed to the wind deflector body at intervals along the direction away from the inner surface of the wind deflector body, so as to be connected with the wind deflector The main body jointly guides the supply air flow.

In the wall-mounted air-conditioning indoor unit of the present invention, the air duct includes a front air duct wall and a rear air duct wall arranged at intervals in the front and back, so that the rear air duct wall includes a main body section and a turning section, and the turning section is connected to the air outlet end of the main section. And it bends downwards and extends compared with the main body section, so that after the air flow flows out from the main body section, it bends downwards and flows along the turning section. According to the Coanda effect (also known as the Coanda effect), when there is surface friction between the fluid and the surface of the object it flows through (it can also be said to be fluid viscosity), as long as the curvature is not large, the fluid will flow along the surface of the object . Therefore, although the direction of the turning section is turned downward at a certain angle compared with the main section, the airflow will continue to flow along the surface of the turning section. This makes the air outlet direction of the airflow have a downward turning, so as to be closer to the vertical downward direction, so as to be more beneficial to reach the ground directly. Especially when the air conditioner is heating, the foot warming experience can be achieved by blowing downward.

Furthermore, in the wall-mounted air conditioner indoor unit of the present invention, the shape of the turning section, the shape of the main section, and important size and angle parameters are specially limited so as to achieve an optimal "wind direction turning" effect. That is, it is necessary to make the turning angle of the turning section larger so that the turning angle of the wind direction is larger and closer to the vertical direction; at the same time, it is necessary to ensure a strong enough Coanda effect to avoid the wind caused by the too large bending angle of the turning section. The airflow cannot be well attached to the surface of the turning section, but the total amount of airflow that finally completes the turning is too small.

Furthermore, the inventors of the present invention found that if the turning section is set as a convex surface or a plane, it also has a Coanda effect, but when the angle of the turning section is large, the airflow is easier to break away from the surface, and the airflow that is finally bent and turned The amount becomes less. Based on this understanding, the inventor specially designed the turning section as a concave arc shape. When the main airflow section initially enters the bending section, it turns at a relatively large angle, which is called the initial turning angle. The airflow then gradually eases along the concave arc surface, so that the turning degree gradually decreases, and finally the angle between the air outlet direction from the outlet end of the bending section and the air outlet direction of the main section (called the final turning angle) is smaller than the initial turning angle. Angled. In a word, the present invention uses the concave arc-shaped surface of the turning section to form a certain buffer for the airflow after turning, so that the Coanda effect is better and the Coanda airflow is more.

Further, in the present invention, the angle between the air inlet direction of the turning section and the air outlet direction of the main body section is between 25° and 35°, and the angle between the air outlet direction of the turning section and the air outlet direction of the main section is 5° ° to 15 °, to strengthen the above-mentioned effect, so that the "wind direction turning" can be taken into account in terms of both angle and air volume.

Furthermore, in the wall-mounted air conditioner indoor unit of the present invention, the turning section and the bottom wall of the housing are connected through a protruding section, so that after the air supply air flows out of the turning section, it relies on the Coanda effect along the convex section. The outlet section flows out of the air outlet to further turn downwards so that the air outlet direction is closer to the vertical direction.

Furthermore, in the wall-mounted air conditioner indoor unit of the present invention, the front air channel wall includes a first section extending from the upper front to the lower rear and a second section extending forward from the lower end of the first section to the upper end of the air outlet, and the second section The second section is a convex arc, so that the airflow on the surface of the front air duct wall gradually rises along the second section, so that the upward angle of the air supply airflow is larger. When the air conditioner is cooling and blowing, it is beneficial to improve the upward angle of the airflow.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic cross-sectional view of a wall-mounted air conditioner indoor unit according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of the outlet part of the air duct in the wall-mounted air conditioner indoor unit shown in Fig. 1;

Fig. 3 is a schematic diagram of the angle labeling of the air duct shown in Fig. 2;

Fig. 4 is a schematic diagram of the state of the indoor unit of the wall-mounted air conditioner shown in Fig. 1 in the cooling mode;

Fig. 5 is a schematic diagram of the state of the wall-mounted air conditioner indoor unit shown in Fig. 1 when it is running in the heating mode;

Fig. 6 is a schematic diagram of the state of the indoor unit of the wall-mounted air conditioner shown in Fig. 1 when operating in the maximum air outlet mode.

Detailed ways

The wall-mounted air conditioner indoor unit according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 6 . Among them, the orientation or positional relationship indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "horizontal", etc. are based on the The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does 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 construed as limiting the present invention . The flow direction of the air supply airflow is indicated by arrows in the figure.

The terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "comprises or comprises" one or some of the features it encompasses, unless specifically stated otherwise, this indicates that other features are not excluded and that other features may be further included.

Unless otherwise expressly specified and limited, terms such as "mounted", "connected", "connected", "fixed" and "coupled" should be interpreted in a broad sense, for example, it may be a fixed connection or a detachable connection, or Integrate; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined . Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific situations.

Fig. 1 is a schematic cross-sectional view of a wall-mounted air conditioner indoor unit according to an embodiment of the present invention; Fig. 2 is a schematic structural view of the outlet part of the air duct 20 in the wall-mounted air conditioner indoor unit shown in Fig. 1; Schematic diagram of the angle labeling of the air duct 20 .

An embodiment of the present invention provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit is the indoor part of the split wall-mounted room air conditioner, and is used to adjust indoor air, such as cooling/heating, dehumidification, and introducing fresh air, etc.

As shown in FIGS. 1 to 3 , the wall-mounted air conditioner indoor unit according to the embodiment of the present invention may generally include a housing 10 and an air duct 20 .

Wherein, the casing 10 is provided with an air outlet 12 opening forward and downward. The casing 10 defines an accommodation space for various components for accommodating the wall-mounted air conditioner indoor unit. The air outlet 12 can be provided at the lower front side of the casing 10 so as to open forward and downward. The air outlet 12 is used to discharge the airflow in the casing 10 to the indoor environment, so as to adjust the indoor air. The exhausted airflow refers to the airflow that is acted on by the fan in the casing 10 to accelerate the flow through the air outlet 12 and is used to adjust the indoor environment, such as cold air in the cooling mode, hot air in the heating mode, and fresh air in the fresh air mode. Fresh air flow and so on. The casing 10 may be in the shape of a long strip whose length direction is horizontally arranged, and the air outlet 12 may be in the shape of a strip whose length direction is parallel to the length direction of the casing 10 .

The air duct 20 includes a front air duct wall 200 and a rear air duct wall 100 which are spaced apart from each other. The airflow of the casing 10 is guided to the air outlet 12 . Moreover, the rear air channel wall 100 includes a main body section 110 and a turning section 120 . The main body section 110 may be in a curved shape concaved toward the rear, so as to wrap the fan 40 at the rear side of the fan 40 .

The turning section 120 connects with the air outlet end of the main section 110 and bends downwards compared to the main section 110 , so that the air flows out from the main section 110 and bends downward along the turning section 120 . In FIG. 2 , the dotted arrow near the rear air channel wall 100 indicates the airflow direction when no turning section 120 is provided, and the solid line arrow indicates the airflow direction after the turning section 120 is provided.

In the embodiment of the present invention, since the main body section 110 and the turning section 120 are arranged on the rear air channel wall 100 , after the air flow flows out from the main section 110 , it bends and flows downward along the turning section 120 . According to the Coanda effect of the fluid (also known as the Coanda effect), when there is surface friction between the fluid and the surface of the object it flows through (it can also be said to be fluid viscosity), as long as the curvature is not large, the fluid will follow the object surface flow. Therefore, in this embodiment, although the direction of the turning section 120 is turned downward at a certain angle compared with the main section 110 , the airflow will continue to flow along the surface of the turning section 120 due to the viscosity. This makes the air outlet direction of the airflow have a downward turning, so as to be closer to the vertical downward direction, so as to be more beneficial to reach the ground directly. Especially when the air conditioner is heating, the foot warming experience can be achieved by blowing downward.

In some embodiments of the present invention, as shown in FIG. 2 and FIG. 3 , the shape of the turning section 120, the shape of the main body section 110, and important dimensions and angle parameters are specially limited so as to achieve an optimal "wind turning "Effect. That is, it is necessary to make the bending angle of the turning section 120 larger, so that the angle of the wind direction turning is larger, closer to the vertical downward direction; If the bending angle is too large, the airflow cannot be well attached to the surface of the turning section 120 , and on the contrary, the total amount of airflow that completes the turning is too small.

Specifically, as shown in FIGS. 2 and 3 , the turning section 120 is formed into a concave arc, and the axis of the arc is parallel to the transverse direction of the air outlet 12 . The lateral direction of the air outlet 12 refers to the lateral direction of the housing 10 , that is, the direction perpendicular to the paper in each of FIGS. 1 to 3 .

In some existing application structures using the "Coanda effect" in other fields, the surface of the object is often set as a plane or a convex surface in order to make the fluid divert at a greater angle. However, the inventors of the present invention found that if the turning section 120 is set as a convex surface or a plane to have a Coanda effect, but when the angle of the turning section 120 is relatively large, the airflow is easier to break away from the surface, and instead changes the airflow of the final bend. few.

Based on this understanding, the inventors of the present invention specially designed the turning section 120 as a concave arc shape. When the main airflow section 110 initially enters the bending section, it turns at a relatively large angle, which is called the initial turning angle α. The airflow then gradually eases along the concave arc surface, so that the turning degree gradually decreases, and finally the angle between the air outlet direction of the outlet end of the bent section and the air outlet direction of the main body section 110 (called the final turning angle β) is smaller than The initial turning angle α. In a word, the embodiment of the present invention utilizes the concave arc surface of the turning section 120 to form a buffer for the diverted airflow, so that the Coanda effect is better and the Coanda airflow is more.

Further, as shown in FIG. 3 , the angle between the air inlet direction of the turning section 120 and the air outlet direction of the main body section 110 (that is, the angle between the tangential direction of the inlet end of the turning section 120 and the tangential direction of the outlet end of the main body section 110 is also That is, the aforementioned initial turning angle α) is between 25° and 35° inclusive. Preferably, α is set between 28° and 32°, so that the angle of airflow turning from the main body section 110 to the turning section 120 in the initial direction reaches an optimal range, so that the "wind direction turning" can be obtained in terms of angle and air volume. Take care.

In addition, as shown in Figure 3, the angle between the air outlet direction of the turning section 120 and the air outlet direction of the main body section 110 (that is, the angle between the tangential direction of the outlet end of the turning section 120 and the tangential direction of the outlet end of the main body section 110, That is, the aforementioned final turning angle β) is between 5° and 15° inclusive. Preferably, β is set between 8° and 12°, so that the airflow finally obtains an effective turning.

As shown in FIGS. 2 and 3 , the part where the main body section 110 and the turning section 120 meet is also in a concave arc shape, its axis is parallel to the transverse direction of the air outlet 12 , and its diameter is the same as that of the turning section 120 The ratio is between 2 and 3, including the endpoint value, preferably set between 1.5 and 2.5, so that the airflow will be more stable in the turning direction from the main body section 110 to the turning section 120, and avoid the difference between the two diameters being too large or too small to cause Airflow is unstable.

In some embodiments of the present invention, as shown in FIG. 2, a circular arc transition section 140 (section AB) can be provided between the main body section 110 and the turning section 120 (section BC), so as to make the transition between the two more gentle, which is beneficial to enhance the airflow wall attachment effect.

In addition, the turning section 120 (BC section) can be connected with the bottom wall 101 of the housing 10 through an outwardly convex protruding section 130 (CD section), so that after the airflow flows out of the turning section 120 (BC section), it at least A part can continue to turn downwards along the surface of the protruding section 130, so as to increase the downward blowing angle of the airflow, and the downward blowing direction is closer to the vertical direction.

In some embodiments of the present invention, as shown in FIGS. 1 to 3 , the front air duct wall 200 may include a first segment 210 extending from the upper front to the lower rear (ie, the EF segment) and from the lower end of the first segment 210 to the The front extension (including extending straight forward, forward upward or forward downward) to the second segment 220 (namely FG segment) at the upper end of the air outlet 12 . Moreover, the second segment 220 is in a convex arc shape, and its axis is parallel to the transverse direction of the air outlet 12 , that is, parallel to the direction of the paper.

The inventor realized that the existing wall-mounted air-conditioning indoor units are limited by the layout of internal fans, heat exchangers, etc., and usually the air outlet is opened at the lower front side of the housing, and it is opened to the front and bottom. In such a solution, due to being hindered by the front of the housing, the wind deflector at the air outlet is inconvenient to guide the outlet airflow in a vertically upward or nearly vertically upward direction. Therefore, the rising angle of the air outlet airflow is very limited.

In the embodiment of the present invention, by making the second section 220 a convex arc shape, the airflow on the surface of the front air duct wall 200 is gradually raised along the second section 220 by relying on the Coanda effect, so that the upward angle of the air supply airflow is larger. When the air conditioner is cooling and blowing upward, it is beneficial to increase the upward angle of the airflow and increase the upward blowing distance.

Further, the angle θ between the air outlet direction and the air inlet direction of the second section 220 can be made smaller than 45°, so as to avoid too large a turning angle and cause too much airflow to escape from the surface of the second section 220, and instead make the final bending Air flow decreases.

The wall-mounted air conditioner indoor unit in the embodiment of the present invention may be an indoor part of a split wall-mounted room air conditioner that utilizes a vapor compression refrigeration cycle system for cooling/heating. As shown in FIG. 1 , a heat exchanger 30 and a fan 40 are provided inside the casing 10 . The heat exchanger 30 and the throttling device are connected with the compressor, the condenser and other refrigeration elements arranged in the housing of the outdoor unit of the air conditioner through pipelines to form a vapor compression refrigeration cycle system.

Under the action of the fan 40, the indoor air enters the interior of the housing 10 through the air inlet 11 on the top of the housing 10, and after completing forced convection heat exchange with the heat exchanger 30, heat exchange air is formed, and then guided by the air duct 20 Blow down toward the air outlet 12.

The fan 40 is preferably a cross-flow fan whose axis is parallel to the length direction of the casing 10 , and is arranged at the inlet of the air duct 20 . The heat exchanger 30 can be a three-stage heat exchanger, which surrounds the fan 40 in front of and above the fan 40, so that its heat exchange efficiency is higher.

In some embodiments, as shown in FIG. 1 , the wall-mounted air conditioner indoor unit may further include a wind deflector 60 for guiding the air outlet 12 in an up and down air outlet direction. The air duct 60 cooperates with the air deflector 60 to strengthen the above-mentioned blowing up/down blowing effect. That is, when the air deflector 60 guides the airflow downward, the rear air duct wall 100 can play an auxiliary role of blowing down, which is beneficial for the airflow to blow out downward. When the air deflector 60 guides the airflow upwards, the front air channel wall 200 can play an auxiliary upward blowing function, which is beneficial for the airflow to blow upwards.

The wind deflector 60 may include a wind deflector body 61 and multi-layer inner wind deflectors 62 , 63 . The wind deflector body 61 is rotatably arranged at the air outlet 12 (around the y-axis), and the multilayer inner wind deflectors 62, 63 are arranged inside the wind deflector body 61, and the multilayer inner wind deflectors 62, 63 are arranged along the The direction away from the inner surface of the air deflector body 61 is sequentially fixed to the air deflector body 61 at intervals, so as to guide the air flow together with the air deflector body 61 .

Specifically, the wind deflector 60 may further include at least one connecting portion for connecting and fixing the wind deflector body 61 and the multi-layer inner wind deflectors 62 , 63 .

The multi-layer inner air deflectors 62, 63 are spaced apart from the air deflector body 61. When the air deflector body 61 rotates to a certain position, the air flow can not only be guided by the air deflector body 61, but also can enter the air deflector body. The space between the main body 61 and the adjacent inner air deflectors 62, 63 and the interval between each adjacent two inner air deflectors 62, 63, so that the air flow can be controlled by the multilayer inner air deflectors 62, 63. The guidance realizes the multi-level guidance of the air supply airflow, so that the direction of the air supply airflow discharged from the air outlet 12 is unified, and the air supply airflow is combed more smoothly, thereby improving the user's comfort.

In some specific embodiments, as shown in FIG. 1 , the number of inner wind deflectors can be set to two, respectively inner wind deflectors 62 and 63 , which are sequentially and spaced inside the wind deflector body 61 . In the flow direction of the air supply airflow, the inner air deflector 63 farthest from the air deflector body 61 can use its inner surface to guide at least a part of the airflow, and the remaining airflow can enter the two inner air guides in turn. The gap between the plates 62, 63 and the gap between the inner wind deflectors 62, 63 and the wind deflector body 61 positioned at the rear, utilize the inner surfaces of the inner wind deflectors 62, 63 and the wind deflector body 61 to oppose each other. The rest of the supply air flow is directed again, making the air flow blown in a certain direction more layered.

In addition, the inventor found through simulation and experimentation that the direction and wind speed of the air supply airflow derived jointly by the wind deflector body 61 and the multi-layer inner wind deflectors 62, 63 (gathering together after detaching from the wind deflector 60) are more accurate. Stable, better wind gathering effect, the wind speed at the far end of the air outlet increases during cooling, the air supply distance is longer, the air outlet guides more smoothly during heating, and the loss of air volume is small, which can completely offset the increase of multiple inner air deflectors 62 , 63 and the increased wind resistance loss is even better than the air outlet efficiency of a single guide plate, so the indoor unit 1 of this embodiment has achieved unexpected technical effects.

It should be noted that the above examples are only to describe the technical solution of this embodiment more clearly, and do not limit the specific number of inner wind deflectors 62, 63. Those skilled in the art should understand that the The number of the inner air deflectors 62, 63 can also be three, four or more, to name just a few.

In the prior art, in order to adjust the air supply direction of the indoor unit of the air conditioner, generally an air deflector that can swing up and down is provided at the air outlet. But this adjustment method has certain defects. The air deflector can only guide the airflow close to its inner surface, but cannot guide the airflow away from its inner surface. Therefore, this may cause the airflow discharged from the air outlet to be disordered, the airflow combing is not smooth, and the user experience is reduced. sense of experience.

In order to overcome the defects of the above-mentioned prior art, the wall-mounted air conditioner indoor unit of this embodiment adds inner wind deflectors 62 and 63 fixed to the wind deflector body 61 at multiple intervals on the inner side of the wind deflector body 61. The inner surfaces of the multi-layer inner air deflectors 62, 63 and the air deflector body 61 guide the airflow together, so that the airflow blown in a certain direction is more layered, and because the airflow is more guided, the airflow is combed. It is smoother, the overall direction and wind speed are more stable, which makes the wind gathering effect of the air supply air flow better, the wind output efficiency is higher, and the user experience is improved.

In some embodiments, the orthographic projection of the inner wind deflector 62 adjacent to the wind deflector body 61 falls on the wind deflector body 61 . And in the direction away from the inner surface of the air deflector body 61 , the orthographic projections of the remaining inner air deflectors on the upper layer fall on the inner air deflectors on the upper layer.

In this embodiment, the inner wind deflector 62 adjacent to the wind deflector body 61 can be set to be equal in size to the wind deflector body 61, or smaller than the width of the wind deflector body 61, and opposite to the wind deflector body 61 , so that the wind deflector body 61 can wrap the inner wind deflectors 62 , 63 .

In the same way, all the remaining inner air deflectors can be set to be equal in size to the inner air deflectors on the upper layer, or smaller than the width of the air deflector body 61, and opposite to the inner air deflectors on the upper layer, so that the upper layer The inner wind deflector of the upper layer can wrap the inner wind deflector of the next layer.

After the above-mentioned limitation, when the wind deflector 60 guides the wind, the inner wind deflector or the wind deflector body 61 at the outer layer can receive the air supply air flow leaked from the inner wind deflector at the inner layer, ensuring The air supply airflow can be guided by multiple layers, and finally discharged out of the air outlet 12 .

In some embodiments, the wind deflector body 61 and the same-side ends of the multi-layer inner wind deflectors 62 and 63 may also be configured to be on the same plane.

One end of the wind deflector body 61 and the multilayer inner wind deflectors 62, 63 is in the same plane, and the other end of the wind deflector body 61 and the multilayer inner wind deflectors 62, 63 is in the same plane, so that the wind deflector 60 The appearance is more beautiful.

In some embodiments, the width of the wind deflector body 61 is greater than the width of the adjacent inner wind deflector 62 , and the widths of the multi-layer inner wind deflectors 62 , 63 are sequentially along the direction away from the inner surface of the wind deflector body 61 decrease.

That is to say, for the inner air deflector of the inner layer, the two ends of the inner air deflector of the outer layer have a dislocation section extending from the inner air deflector of the inner layer, and the dislocation section can not only bear the The air supply airflow leaked by the inner air deflector is more convenient, and it is convenient for the air supply air to enter the gap between the two inner air deflectors, and finally ensure that the supply air flow can enter between every two adjacent inner air deflectors Clearance.

Similarly, for the inner wind deflector 62 adjacent to the wind deflector body 61, the width of the wind deflector body 61 is greater than the width of the inner wind deflector 62 adjacent to it, and the two ends of the wind deflector body 61 have extended The dislocation sections of the adjacent inner air deflectors 62 are used to receive the air supply airflow leaked from the inner inner air deflectors 62 .

Further, the inner surfaces of the wind deflector body 61 and the inner wind deflectors 62 and 63 may also be configured as concentric arc surfaces.

In fluid mechanics, according to the principle of the Coanda effect, when the fluid changes from the original flow direction to the tendency to flow with the surface of the protruding object, when there is surface friction between the fluid and the surface of the object it flows through, as long as the curvature Not too much, the fluid will flow along the surface of the object.

Therefore, the inner surface of the wind deflector body 61 and each inner wind deflector 62, 63 can also be configured as a concentric arc surface so that The supply air flow is better absorbed, resulting in better guidance.

Further, the ratio of the distance between the wind deflector body 61 and the adjacent inner wind deflectors 62, 63 to the arc length of the inner surface of the wind deflector body 61 can also be configured to be between 1/5 and 1/3, For example, 1/5, 1/4 or 1/3 etc.

In the direction away from the inner surface of the wind deflector body 61, the distance between each layer of inner wind deflectors 62, 63 and the adjacent next layer of inner wind deflectors 62, 63 is equal to the arc length of the inner wind deflectors 62, 63 The ratio is between 1/5 and 1/3, such as 1/5, 1/4 or 1/3, etc.

Preferably, the arc length ratio between the air deflector body 61 and the adjacent inner air deflectors 62, 63 and the inner surface of the air deflector body 61 can also be equal to the distance between each layer of inner air deflectors 62, 63 adjacent to it. The distance between the inner wind deflectors 62 and 63 of the next layer and the ratio of the arc lengths of the inner wind deflectors 62 and 63 are configured to be the same.

For the wind deflector body 61 and the inner wind deflectors 62, 63, the longer the arc length, the stronger the wind guiding ability, so the longer the arc length of the wind deflector body 61 or the inner wind deflectors 62, 63 The larger the distance corresponding to the inner surface of the air, the greater the flow rate of the air supply air flow, and the more reasonable distribution of the air supply air flow to the air deflector body 61 and each inner air deflector plate 62, 63 is to guide the air supply air flow more. Make the air flow combing more smoothly.

Certainly, the inner surfaces of the wind deflector body 61 and the multi-layer inner wind deflectors 62 and 63 can also be set as planes after those skilled in the art know the technical solution of this embodiment. Compared with the above-mentioned embodiments, the flat air deflector body 61 and the multi-layer inner air deflectors 62, 63 can basically guide the air flow more, but the arc-shaped inner surface achieves better technical effects .

Fig. 4 is a schematic diagram of the state of the wall-mounted air conditioner indoor unit shown in Fig. 1 when it is in the cooling mode; Fig. 5 is a schematic diagram of the state of the wall-mounted air conditioner indoor unit shown in Fig. 1 when it is in the heating mode; Fig. 6 is a schematic diagram of the state shown in Fig. 1 Schematic diagram of the status of the wall-mounted air conditioner indoor unit in the maximum air output mode.

As shown in Figure 4, the wind deflector 60 can be rotated to the upward blowing position where the inner surfaces of the wind deflector body 61 and the inner wind deflectors 62, 63 face upward, so as to guide the air flow forward or forward and upward. . This blow-up position is especially useful in cooling mode.

As shown in FIG. 5 , the wind deflector 60 can be rotated to a downward blowing position where the inner surfaces of the wind deflector body 61 and the inner wind deflectors 62 , 63 face rearward, so as to guide the air supply airflow downward. This blow-down position is particularly useful in heating mode.

As shown in Figure 6, the air deflector 60 can be rotated to a position where the air deflector body 61 is roughly parallel to the front air duct wall 200 and the rear air duct wall 100, so that the resistance to the airflow is minimized and the maximum air volume is achieved. air supply.

It should be noted that the above examples are only for more clearly describing the working principle of the air deflector 60 in this embodiment, and are not used to limit the position of the air deflector 60 that the indoor unit of the wall-mounted air conditioner must be in. temperature mode (heating or cooling). The user can arbitrarily adjust the working position of the air deflector 60 according to the actual situation, for example, adjust the air deflector 60 to the upward blowing position in the heating mode, and adjust the air deflector 60 to the downward blowing position in the cooling mode, etc. Here I won't go into details.

In some embodiments, the wall-mounted air conditioner indoor unit may further include an outer wind deflector 50 movably arranged at the air outlet 12 for opening and closing the air outlet 12 . Specifically, the outer air deflector 50 can be rotatably mounted on the casing 10 , and the rotation axis x is located at the rear air duct wall 100 so as to move to a position directly below the casing 10 to completely open the air outlet 12 .

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (8)

1. A wall-mounted air conditioner indoor unit comprising:

a shell provided with an air outlet opening towards the front lower side;

the air duct comprises a front air duct wall and a rear air duct wall which are arranged at intervals in the front-rear direction, and the outlet ends of the front air duct wall and the rear air duct wall are respectively connected with the upper end and the lower end of the air outlet so as to guide the air flow of the shell to the air outlet; and is also provided with

The rear air duct wall comprises a main body section and a turning section, wherein the turning section is connected with the air outlet end of the main body section and is bent downwards compared with the main body section, so that air flows downwards along the turning section after flowing out of the main body section;

the turning section is of a concave arc shape, the axis of the arc shape is parallel to the transverse direction of the air outlet, and the included angle between the air inlet direction of the turning section and the air outlet direction of the main body section is 25-35 degrees.

2. The wall-mounted air conditioner indoor unit of claim 1, wherein

The included angle between the air outlet direction of the turning section and the air outlet direction of the main body section is between 5 degrees and 15 degrees.

3. The wall-mounted air conditioner indoor unit of claim 1, wherein

The connecting part of the main body section and the turning section is also in a concave arc shape, the axis of the main body section is parallel to the transverse direction of the air outlet, and the ratio of the diameter of the main body section to the diameter of the turning section is between 2 and 3.

4. A wall-mounted air conditioner indoor unit as claimed in claim 3, wherein

The turning section is connected with the bottom wall of the shell through a convex section which is convex outwards.

5. A wall-mounted air conditioner indoor unit as claimed in claim 3, wherein

An arc transition section is arranged between the main body section and the turning section.

6. The wall-mounted air conditioner indoor unit of claim 1, wherein

The front air duct wall comprises a first section extending from the front upper part to the rear lower part and a second section extending forwards from the lower end of the first section to the upper end of the air outlet; and is also provided with

The second section is in a convex arc shape, and the axis of the second section is parallel to the transverse direction of the air outlet.

7. The wall-mounted air conditioner indoor unit of claim 6, wherein

And the included angle between the air outlet direction and the air inlet direction of the second section is smaller than 45 degrees.

8. The wall-mounted air conditioner indoor unit of claim 1, further comprising an air deflector comprising:

the air deflector body is rotatably arranged at the air outlet;

the multi-layer inner air guide plate is arranged on the inner side of the air guide plate body, and is sequentially fixed on the air guide plate body at intervals along the direction away from the inner surface of the air guide plate body so as to guide the air supply flow together with the air guide plate body.

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