WO2021190200A1

WO2021190200A1 - Air conditioner indoor unit

Info

Publication number: WO2021190200A1
Application number: PCT/CN2021/076470
Authority: WO
Inventors: 闫宝升; 贾丽霞; 王永涛; 尹晓英; 王晓刚
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2020-03-26
Filing date: 2021-02-10
Publication date: 2021-09-30
Also published as: CN111351132A

Abstract

An air conditioner indoor unit, comprising a housing (10) provided with an air outlet (12) facing forwards and downwards; a baffle (60) having an upper end rotatably mounted on the housing (10), and a rotating shaft (63) being located at an upper edge of the air outlet (12), so that the baffle can rotate to an open position where the front side of the air outlet (12) is open, or rotate to a closed position where the front side of the air outlet (12) is covered; and an air guide plate (50) rotatably mounted on the housing (10) and configured: to be rotatable to a first position which is located at the lower side of the air outlet (12) and where an air guide surface (511) thereof is enabled to face upwards, such that when the baffle (60) is in the open position, the air guide plate (50) guides an air supply flow forwards, forwards and upwards, or forwards and downwards; and to be rotatable to a second position which is located at the front side of the air outlet (12) and where the air guide surface (511) is enabled to face backwards, so as to guide the air supply flow downwards. The air conditioner indoor unit can achieve upward blowing and supplying of cold air and downward blowing and supplying of hot air.

Description

Air conditioner indoor unit

Technical field

The present invention relates to the technical field of air conditioning, in particular to an air conditioner indoor unit.

Background technique

With the development of the times and the advancement of technology, users not only expect faster cooling and heating speeds of air conditioners, but also pay more and more attention to the comfort performance of air conditioners.

However, in order to achieve faster cooling and heating, it is inevitable that a large air volume is required. However, when cold or hot wind with excessive wind speed blows directly on the human body, it will inevitably cause discomfort to the human body. If the human body is blown directly by cold wind for a long time, it can also cause air-conditioning disease.

Therefore, how to realize the comfortable air supply of the air conditioner has become a technical problem to be solved urgently in the air conditioner industry.

Summary of the invention

The object of the present invention is to provide an air conditioner indoor unit that overcomes the above-mentioned problems or at least partially solves the above-mentioned problems.

The purpose of the present invention is to provide an indoor unit of an air conditioner that can satisfy the rising and blowing of cold air and the sinking and blowing of hot air.

The further purpose of the present invention is to improve the upward wind guiding effect of the wind deflector.

In particular, the present invention provides an air conditioner indoor unit, which includes:

The shell is provided with an air outlet facing the front and bottom;

The upper end of the baffle is rotatably installed on the housing, and the rotating shaft is located at the upper edge of the air outlet so as to rotate to the open position in front of the open air outlet or to the closed position to block the front side of the air outlet;

The wind deflector is rotatably installed on the shell and configured as:

It can be rotated to the first position on the lower side of the air outlet with the air guiding surface facing upwards, so that when the baffle is in the open position, the air guiding plate directs the airflow to the front, the upper front, or the lower front;

It can be rotated to a second position at the front side of the air outlet with the wind guide surface facing back to guide the air flow downward.

Optionally, the rotation axis of the wind deflector is located on the side of the wind deflector and is spaced apart from the wind deflector, and its projection on the wind deflector is close to the front end of the wind deflector when it is in the first position, so as to facilitate the guide The wind plate rotates to the second position.

Optionally, when the wind deflector is in the second position, the baffle is in an open position to avoid the wind deflector; and the wind deflector is configured such that when it is in the second position, it is erected directly below the upper edge of the air outlet.

Optionally, when the baffle is in the closed position and the wind deflector is in the first position, the baffle and the wind deflector jointly close the air outlet.

Optionally, the wind deflector includes: a wind deflector body, which is installed on the housing, when the wind deflector is in the first position, the upwardly facing surface of the wind deflector body constitutes an air deflector surface; and a wind blowing part formed in the The air guide surface is used to guide the air flow to flow out obliquely upward and forward when the air guide plate is in the first position.

Optionally, the wind blowing portion includes a wind blowing plate arranged at a distance from the wind guide surface; the front and rear ends of the wind deflector body when in the first position are the first end and the second end, respectively. In the direction from the second end to the first end, the distance between the air blowing plate and the air guiding surface gradually increases.

Optionally, the wind deflector is arranged at the first end of the wind deflector body; and the projection of the end of the wind deflector away from the second end on the wind deflector body falls outside the wind deflector surface.

Optionally, the other side surface of the wind deflector body facing away from the wind deflecting surface is formed with a streamlined protrusion at a section close to the first end.

Optionally, the air outlet and the wind deflector are both long strips whose length direction is parallel to the horizontal direction.

Optionally, the indoor unit of the air conditioner further includes: an air duct connected with an air outlet inside the housing for guiding the air flow to the air outlet; and the upper wall of the air duct includes a rearward extension from the upper edge of the air outlet The front plate section, the arc plate section extending back from the rear end of the front plate section, the rear plate section extending from the rear end of the arc plate section backward and upward, and the arc transition section extending from the rear end of the rear plate section first backwards and then upwards And an upper plate section extending forward and upward from the upper edge of the arc-shaped transition section.

The air conditioner indoor unit of the present invention is provided with a baffle and a wind guide plate to have multiple air supply modes, and the air supply comfort experience of the air conditioner indoor unit is improved. When the air conditioner is in refrigeration operation, the baffle can be adjusted to the open position and the air guide plate is in the first position under the air outlet, so that the air guide plate guides the supply air flow (cold air) to the front, upper front, or lower front. For example, you can choose to make the wind deflector guide the cold wind forward and upward, so that the cold wind can be blown out at a larger upward angle (the angle between the airflow blowing angle and the horizontal plane) to avoid the human body. A "shower-style" refrigeration experience. When the air conditioner is in heating operation, you can choose to adjust the air deflector to the second position in front of the air outlet, so that the air deflector guides the supply air flow (hot air) downwards, so that the hot air blows straight down to the bottom surface nearly vertically. , Realize the warm foot experience.

Furthermore, in the indoor unit of the air conditioner of the present invention, since the baffle has the function of blocking the air outlet on the front side of the air outlet, the upper edge of the air outlet can be designed to be higher, which is conducive to a greater upward angle of the air deflector. Guide the wind upward (the higher the upper edge of the air outlet, the greater the theoretical maximum upward angle). Moreover, this also makes the outlet area of the air outlet larger, makes the air outlet more smoothly, reduces the wind resistance and facilitates the large air volume supply.

Further, in the air-conditioning indoor unit of the present invention, the air deflector includes an air deflector body and a wind blowing part. When the air deflector is in the first position, the air blowing part can guide the airflow to flow out obliquely upwards and forwards when the air deflector is in the first position. Increase the upward angle of the supply air flow. In addition, the air blowing plate of the air blowing section is located at the first end of the air deflector body, and the projection of the end on the air deflector body is outside the air deflecting surface, so that the blowing effect of the air blowing plate is improved. good.

In addition, because the wind deflector and the wind deflector body are arranged at intervals, when the wind deflector is in the second position, even if some air flows around to the front end of the wind deflector, it can enter the wind deflector and the wind deflector under the guidance of the wind deflector. In the space between the board bodies, it then continues to flow downwards without escaping to the front side of the wind deflector body and making it impossible to blow downwards better.

Further, the air conditioner indoor unit of the present invention has a special design for the shape of the upper wall of the air duct, and the rear flat section close to the fan is a straight section, which is beneficial to keep the air output of the fan stable. The arc plate section in the middle can expand the air outlet angle, change the air outlet direction, and increase the air volume when the flow resistance is the least. The outermost section of the upper wall of the air duct is the front flat section, which can be horizontal or have a certain upward inclination angle, which can make the airflow of the airflow stable and have better flow directionality. This design for the shape of the upper wall of the air duct makes the air volume and air flow stability better when the air supply air is blown up.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will better understand the above and other objectives, advantages and features of the present invention.

Description of the drawings

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary but not restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic diagram of an air conditioner indoor unit according to an embodiment of the present invention when the baffle is in the closed position and the air guide plate is in the first position;

Fig. 2 is a schematic diagram of the air-conditioning indoor unit shown in Fig. 1 when the baffle is in the open position and the air guide plate is in the first position;

Fig. 3 is a schematic diagram of the air conditioner indoor unit shown in Fig. 1 when the baffle is in the open position and the air guide plate is in the second position;

4 is a schematic diagram of the structure of the air deflector in the indoor unit of the air conditioner shown in FIG. 1;

Fig. 5 is a schematic diagram of the size relationship between the air deflector and the air deflector body of the air deflector shown in Fig. 4;

Fig. 6 is a schematic diagram of the shape of the upper wall of the air duct of the air-conditioning indoor unit shown in Fig. 1.

Detailed ways

Hereinafter, an air conditioner indoor unit according to an embodiment of the present invention will be described 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 drawings shown The orientation or positional relationship of is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention . The solid arrows in the figure indicate the wind direction of the supply air flow, and the hollow arrows indicate the direction in which the ambient air enters.

Fig. 1 is a schematic diagram of an air conditioner indoor unit according to an embodiment of the present invention when the baffle 60 is in the closed position and the air guide plate 50 is in the first position; Fig. 2 is the air conditioner indoor unit shown in Fig. 1 when the baffle 60 is in the open position, A schematic diagram of the air guide plate 50 in the first position; FIG. 3 is a schematic diagram of the air-conditioning indoor unit shown in FIG. 1 when the baffle 60 is in the open position and the air guide plate 50 is in the second position.

As shown in FIGS. 1 to 3, the air conditioner indoor unit of the embodiment of the present invention may generally include a housing 10, a baffle 60 and a wind guide plate 50.

An air outlet 12 is provided on the housing 10, and the air outlet 12 faces forward and downward (refers to that the outlet section of the air outlet 12 faces forward and downward, or the normal line of the air outlet 12 gradually slopes downward from back to front). The air flow blown out from the inside of the housing 10 is a blowing air flow. When the air conditioner is cooling, the supply air flow is cold air; when the air conditioner is heating, the supply air flow is hot air. Of course, when the air conditioner has a fresh air mode, the supply air flow can also be outdoor air.

The air-conditioning indoor unit can be an indoor unit of an air-conditioning system that performs cooling/heating through a vapor compression refrigeration cycle system, and specifically can be a wall-mounted unit, an indoor unit of a cabinet unit, or various terminal models of a central air conditioner. For example, as shown in Figure 1, the air conditioner indoor unit is a wall-mounted air conditioner indoor unit. The indoor unit of the air conditioner may include an evaporator 20, a fan 30, and an air duct 40. The evaporator 20 is used to exchange heat with the air entering the housing 10 from the air inlet 11 to form cold air or hot air. The inlet of the air duct 40 faces the evaporator 20 and the outlet is connected to the air outlet 12. The fan 30 may be a cross-flow fan, which is arranged at the inlet of the air duct 40 to encourage air to flow from the evaporator 20 to the air outlet 12.

The upper end of the baffle 60 is rotatably mounted on the housing 10, and the rotating shaft 63 is located at the upper edge of the air outlet 12 so as to rotate to the open position of the front side of the open air outlet 12, as shown in Figures 2 and 3; Block the closed position of the front side of the air outlet 12, as shown in Figure 1. When the baffle 60 is in the closed position, it is in a vertical posture or close to a vertical posture, so as to be shielded on the front side of the air outlet 12 and the air flow cannot be blown forward. Moreover, it can be understood that the baffle 60 has multiple opening positions, and the difference lies in the different opening angles. As long as the baffle 60 rotates forward from the closed position to open the front side of the air outlet 12 to allow the air flow to flow forward, it is in the open position. The air guiding effect of the baffle 60 can be changed by adjusting the opening angle of the baffle 60. A motor is installed in the housing 10 to drive the baffle 60 to rotate. Alternatively, the baffle 60 can also be a manual rotation structure.

The air guide plate 50 is rotatably installed on the housing 10 and has an air guide surface 511 mainly used for contacting the air flow of the supply air and guiding the air flow of the supply air. The air deflector 50 is configured to be rotatable to a first position on the lower side of the air outlet 12 with the air guiding surface 511 facing upward, so that when the baffle 60 is in the open position, the air deflector 50 directs the airflow forward , The front top or front bottom guide, as shown in Figure 2; and it can also be rotated to a second position located on the front side of the air outlet 12 so that the air guide surface 511 faces backwards to guide the supply air flow downward, as shown in Figure 3. The wind deflector 50 is positioned at the front side of the air outlet 12 so that the blowing airflow flows downward from the rear side of the wind deflector 50 as much as possible. It can be understood that the embodiment of the present invention only uses the first position and the second position as examples to introduce the wind guide effect of the wind deflector 50. Of course, the wind deflector 50 can be rotated to other positions except the first position and the second position. Position in order to guide the supply air flow in other directions. A motor is installed in the housing 10 to drive the wind deflector 50 to rotate.

The air outlet 12 and the air guide plate 50 may both be long strips whose length direction is parallel to the horizontal direction. The rotation axis 53 of the wind deflector 50 is parallel to the length direction of the wind deflector 50. The baffle 60 can be in the shape of a flat plate or a curved surface with a convex surface facing outward, and can be smoothly connected with the front surface of the housing 10 when in the closed position, so that the appearance of the indoor unit of the air conditioner is more beautiful.

As shown in Figures 1 and 2, the rotation axis 53 of the air guide plate 50 can be located on the side of the air guide surface 511 and spaced apart from the air guide surface 511, and its projection H on the air guide surface 511 is close to the air guide plate When 50 is in the first position, the end (that is, end A) facing forward, so that the wind deflector 50 can rotate to the aforementioned second position. That is, the projection H is located at least in the front half section when the wind deflector 50 is in the first position. Specifically, the lateral ends of the rotating shaft 53 can be rotatably connected to the lateral ends of the housing 10.

In some embodiments, when the wind deflector 50 is in the second position, the baffle 60 is in the open position to avoid the wind deflector 50. That is, the baffle 60 must be opened before the wind deflector 50 can be rotated to the second position, otherwise the baffle 60 will block the wind deflector 50 so that it cannot rotate to the second position. The advantage of this design is that since the baffle 60 is already opened before the air deflector 50 moves to the second position, it will not cause any interference to the air deflector. In this way, the rotation path of the wind deflector 50 can be specially designed to make it more forward in the second position, so that the distance from the lower edge of the air outlet 12 is farther, and the air outlet area is larger. For example, the shape and size of the wind deflector 50 and the position of the rotating shaft 53 can be designed so that when the wind deflector 50 is in the second position, it is vertically (vertical or nearly vertical) at the air outlet 12 Just below the upper edge, it can enlarge the air outlet area without affecting the appearance of the indoor unit of the air conditioner.

In addition, since the interference between the baffle 60 and the wind deflector 50 is not considered, the wind deflector 50 can continue to rotate toward the inside of the air outlet from the second position (that is, it can continue to rotate clockwise from the state shown in FIG. 3). To the state of gradually leaning forward from top to bottom to achieve the effect of blowing air mainly downwards and leaning forward and downward.

Of course, in other alternative embodiments, when the baffle 60 is in the closed position, the wind deflector 50 can also be rotated to the second position without interfering with the baffle 60. That is, when the wind deflector 50 is rotated to the second position, the baffle 60 does not need to be opened.

In the embodiment of the present invention, since the baffle 60 and the air guide plate 50 are provided in the air conditioner indoor unit, it has multiple air supply modes, which improves the comfort experience of air supply of the air conditioner indoor unit. For example, when the air conditioner is in refrigeration operation, the baffle 60 can be adjusted to the open position and the air guide plate 50 is in the first position under the air outlet 12, so that the air guide plate 50 will send the air flow (cold air) forward and forward. Guide from above or below. Preferably, the wind deflector 50 can be selected to guide the cold wind forward and upward, so as to blow the cold wind at a greater upward angle (the angle between the airflow blowing angle and the horizontal plane) to avoid the human body. When the cold wind reaches its highest point, it will scatter downwards, realizing a "shower-like" refrigeration experience, as shown in Figure 2. When the air conditioner is in heating operation, the wind deflector 50 can be adjusted to the second position in front of the air outlet 12, so that the wind deflector 50 guides the supply air flow (hot air) downward, so that the hot air is close to vertical downward. Blow straight on the bottom surface to achieve a foot warming experience, as shown in Figure 3.

Further, in the embodiment of the present invention, since the baffle 60 has the function of shielding the air outlet 12 on the front side of the air outlet 12, the upper edge of the air outlet 12 can be designed to be higher, which is beneficial to the air guide plate 50. The large rising angle guides the wind direction (the higher the upper edge of the air outlet, the larger the theoretical maximum rising angle). Moreover, this also makes the air outlet area of the air outlet 12 larger, which is conducive to large air volume.

4 is a schematic diagram of the structure of the air deflector 50 in the air-conditioning indoor unit shown in FIG. 1; FIG. 5 is a schematic diagram of the size relationship between the air deflector 52 and the air deflector body 51 of the air deflector 50 shown in FIG. 4.

In some embodiments, as shown in FIG. 4, the wind deflector 50 may include a wind deflector body 51 and a blowing part. The wind deflector body 51 serves as the main body of the wind deflector 50 and is installed on the casing 10 for movably connecting with the casing 10. When the wind deflector 50 is in the aforementioned first position (refer to FIG. 2), the upwardly facing surface of the wind deflector body 51 constitutes the aforementioned wind deflecting surface 511, which is mainly used to guide the air flow. The blowing part is formed on the air guide surface 511, and is used to guide the supply air flow to flow out obliquely upward and forward when the air guide plate 50 is in the first position, which increases the upward angle of the supply air flow. At the time, make the cold wind blow upwards at an angle closer to the vertical upwards.

As shown in FIG. 4, the wind blowing part may include a wind blowing plate 52 arranged at intervals from the wind guide surface 511. It is assumed that the front and rear ends of the air deflector body 51 when in the first position are the first end (A end) and the second end (B end), respectively, as shown in FIG. 2. In the direction from the second end to the first end (the direction from end B to end A, when the wind deflector 50 is in the first position, this direction is the flow direction of the airflow), the wind deflector 52 and the wind deflector The distance between the surfaces 511 is gradually increased to smoothly guide the airflow gradually away from the wind deflector body 51. In addition, since the wind deflector 52 is spaced from the wind deflector body 51, when the wind deflector 50 is in the second position, even if some air flows around to the front end of the wind deflector 52, it can enter the wind deflector under the guidance of the wind deflector 52. In the space between the air plate 52 and the air deflector body 51, then continue to flow downward, as shown in Figure 3, without escaping to the front side of the air deflector body 51 and making it impossible to blow downwards better .

As shown in Fig. 4, it is preferable that the air blowing plate 52 is arranged at the first end (end A) of the air deflector body 51, so that the blowing air flow is close to leaving the air deflector 50 to guide it upward, so that It rises and blows out. In addition, the projection of the end (end E) of the air blowing plate 52 away from the second end on the air guiding plate body 51 can be made to fall outside the air guiding surface 511. In other words, the air outlet end (end A) of the wind deflector body 51 is retracted from the end (end E) of the wind deflector 52 toward the second end (end B) of the wind deflector body 51 by a certain distance. It can also be understood that a vertical line is drawn at the end of the wind deflector 52 on the wind deflecting surface 511 of the wind deflector body 51, and the vertical foot will fall on the extended surface of the wind deflecting surface 511. This makes the wind blowing plate 52 more protruding relative to the wind deflector body 51, which is beneficial for blowing the wind at a greater angle.

The air blowing part may further include a connecting rib (not shown), which is connected between the air deflector body 51 and the air blowing plate 52 to realize the structural connection between the two. The air blowing part and the air deflector body 51 may be an integral piece formed in one piece.

The embodiment of the present invention optimizes the design of the size relationship and relative position relationship between the wind blowing plate 52 and the wind deflector body 51 to make it have a better wind blowing effect. FIG. 5 is a schematic diagram of the size relationship between the wind deflector 52 and the wind deflector body 51 of the wind deflector 50 shown in FIG. 4.

As shown in FIG. 5, the air blowing plate 52 may include a flat main body section 521 and an arc section 522 connected to the end of the flat main body section 521 that is closer to the air deflector body 51 and whose convex surface faces the air deflector body 51. The arc-shaped section 522 is smoothly connected to the flat main body section 521, and is used to guide the supply air flow to the flat main section 521 more smoothly and smoothly, and the flat main section 521 guides the supply air flow upward.

As shown in FIG. 5, the ratio of the width of the wind blowing plate 52 (the distance between the two ends of the ED) to the width (L ₁ ) of the wind deflector body 51 can be between 0.3 and 0.35, preferably 1/3. Yang wind deflector 52 so that the width (L ₂₎ and the width of the deflector body 51 (L ₁₎ falls outside the projected air guide surface 511 of the air guide surface 511 in the portion between the ratio from 0.08 to 0.12, preferably 0.1. The blowing angle θ of the blowing plate 52 (the angle between the flow direction of the blowing air flow after being blown from the blowing plate 52 and the flow direction of the blowing air flow before it flows into the surface of the blowing plate 52) is preferably between 25° and 35°, one On the one hand, it ensures that the supply air flow has a better upward effect, and at the same time, avoids excessive airflow resistance caused by the excessive angle of the air blowing part.

In some embodiments, as shown in FIGS. 2 and 4, the other side surface 512 of the wind deflector body 51 facing away from the wind deflecting surface 511 can be formed with a streamlined convex at the section adjacent to the first end (end A). From 5121. When the air deflector 50 is in the first position, part of the airflow from the air deflector body 51 flows forward from the upper side of the air deflector body 51 and the air blowing plate 52. The negative pressure of the airflow is driven by the airflow, and the streamlined protrusions Under the guidance of 5121, the room temperature air under the air deflector body 51 can be merged into the supply air flow, forming a certain mixing effect, increasing the air supply volume, and making the temperature of this part of the air flow closer to room temperature, making the human body feel more comfortable . As mentioned above, the air-conditioning indoor unit may include the air duct 40. The air duct 40 is connected to the air outlet 12 inside the housing 10 for guiding the air flow to the air outlet 12.

In the embodiment of the present invention, when the wind deflector 50 is in the first position, it has a multi-level wind blowing effect. Specifically, the surface (upper surface in this state) of the air blowing plate 52 facing away from the air deflector body 51 forms a large-elevation wing surface structure. The airflow is accelerated by the fan and flows smoothly. Ascending, the lift rapidly increases, pushing the overall airflow velocity to increase, and the upward blowing angle increases, which can quickly reach a higher angle and speed of the rising wind within a very short distance, forming the first-stage rising wind (the first-stage rising wind process is similar to During the take-off process of the carrier-based aircraft that skid-off and take off on the aircraft carrier, the extended profile of the wind-raising plate 52 can also be an Archimedes spiral to enhance the first-stage wind-raising effect. A channel that gradually expands along the airflow direction is formed between the air blowing plate 52 and the air deflector body 51, and the channel entrance is narrow, so that the airflow enters at a high speed. The channel area gradually increases to minimize the resistance when the airflow passes, and after the airflow passes, still maintain a high wind speed. At the same time, the air outlet angle gradually rises under the action of the surface (lower surface) of the air blowing plate 52 facing the air deflector body 51, so that the middle-level high-speed air flow further rises up the blowing channel to form a second level of blowing air. After the blowing air flow of the first stage and the second stage of the blowing wind, it forms a negative pressure zone on the lower side of the air deflector body 51. The airflow from the lower layer is attracted by negative pressure, changes direction, and deflects upward along the air deflector body 51, and merges with the high-speed and high-pressure airflow in the middle layer to form an integrally directed polymer airflow. The upward movement of the lower airflow forms a third level of rising wind. Through the three-stage blowing effect of the invention, the refrigerating upward blowing airflow progresses step by step and rises layer by layer, forming an overall large-angle upper airflow effect.

Fig. 6 is a schematic diagram of the shape of the upper wall 41 of the air duct of the air-conditioning indoor unit shown in Fig. 1.

In some embodiments, as shown in FIG. 6, the upper wall 41 of the air duct 40 includes a front flat section (ab section) extending backward from the upper edge of the air outlet 12, and a rear end from the front flat section (ab section). The arc plate section (bc section) extending backward, the rear plate section (cd section) extending from the rear end of the arc plate section (bc section) backward and upward, and the rear plate section (cd section) from the rear end first backward and then upward An extended arc-shaped transition section (de section) and an upper flat plate section (ef section) extending forward and upward from the upper edge of the arc-shaped transition section (de section). Through the special design of the shape of the upper wall 41 of the air duct 40, the rear flat section (cd section) close to the fan 30 is a straight section, which is beneficial to keep the wind from the fan stable. The middle arc section (bc section) can expand the wind angle, change the wind direction, and increase the wind volume when the flow resistance is the least. The outermost section of the upper wall 41 of the air duct is the front flat section (section ab), which can be horizontal or have a certain upward inclination angle, which can make the air flow out of the wind stable and have better flow directionality. This design for the shape of the upper wall 41 of the air duct makes the air volume and air flow stability better when the air supply air is blown upward.

The inventor found through research that _{the ratio of the arc length L bc of the} _{arc plate section (section bc) to the length L ab} of the front plate section (section ab) is preferably set between 1.5 and 2.5. The ratio of the length L _ab is preferably provided rear plate section (cd segment) length L _cd front plate section (ab section) is between 0.3 to 0.6, the above effect can be enhanced.

So far, those skilled in the art should realize that although multiple exemplary embodiments of the present invention have been illustrated and described in detail herein, they can still be disclosed according to the present invention without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications that conform to the principles of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all these other variations or modifications.

Claims

An indoor unit of an air conditioner, including:

The shell is provided with an air outlet facing the front and bottom;

The upper end of the baffle is rotatably installed on the housing, and the rotating shaft is located at the upper edge of the air outlet, so as to rotate to an open position that opens the front side of the air outlet, or rotates to block the air outlet The closed position on the front side; and

The wind deflector is rotatably installed on the casing and configured as:

It can be rotated to a first position on the lower side of the air outlet with its air guiding surface facing upwards, so that when the baffle is in the open position, the air guiding plate directs the airflow forward, upward, or forward. Below guide

It can be rotated to a second position at the front side of the air outlet and with the air guiding surface facing back, so as to guide the blowing air flow downward.
The air conditioner indoor unit according to claim 1, wherein:

The rotation axis of the wind deflector is located on the side of the wind deflector and is spaced apart from the wind deflector, and its projection on the wind deflector is adjacent to the wind deflector in the first position The one end that faces forward at the time, so that the wind deflector rotates to the second position.
The air conditioner indoor unit according to claim 1, wherein:

When the wind deflector is in the second position, the baffle is in the open position to avoid the wind deflector; and

The wind deflector is configured to be erected directly below the upper edge of the air outlet when in the second position.
The air conditioner indoor unit according to claim 1, wherein:

When the baffle is in the closed position and the wind deflector is in the first position, the baffle and the wind deflector jointly close the air outlet.
The air conditioner indoor unit according to claim 1, wherein the wind deflector comprises:

A wind deflector body, which is installed on the housing, and when the wind deflector is in the first position, the upwardly facing surface of the wind deflector body constitutes the wind guide surface; and

The blowing part is formed on the air guiding surface, and is used for guiding the airflow to flow out obliquely upward and forward when the air guiding plate is in the first position.
The air conditioner indoor unit according to claim 5, wherein:

The wind blowing part includes a wind blowing plate arranged at a distance from the wind guide surface;

Suppose the front and rear ends of the air deflector body when in the first position are the first end and the second end, respectively,

In the direction from the second end to the first end, the distance between the air blowing plate and the air guiding surface gradually increases.
The air conditioner indoor unit according to claim 6, wherein:

The wind blowing plate is arranged at the first end of the wind deflector body; and

The projection of the end of the air blowing plate away from the second end on the air guiding plate body falls outside the air guiding surface.
The air conditioner indoor unit according to claim 6, wherein:

The other side surface of the wind deflector body facing away from the wind deflecting surface is formed with a streamlined convex portion at a section adjacent to the first end.
The air conditioner indoor unit according to claim 1, wherein:

The air outlet and the wind deflector are both long strips whose length direction is parallel to the horizontal direction.
The air conditioner indoor unit according to claim 1, further comprising:

An air duct is connected to the air outlet inside the housing for guiding the air flow to the air outlet; and

The upper wall of the air duct includes a front flat section extending rearward from the upper edge of the air outlet, an arc section extending rearward from the rear end of the front flat section, and A rear flat section extending from the rear and upwards, an arc transition section extending from the rear end of the rear flat section first backward and then upward, and an upper flat section extending forward and upward from the upper edge of the arc transition section.