A wall-mounted air conditioner indoor unit

Abstract

The application relates to the air conditioning technical field, in particular to a wall-mounted air conditioner indoor unit. The indoor unit comprises a casing, a heat exchanger, a fan, a main air duct, an upper air duct, a lower air duct and a guide vane are arranged in the casing, the main air duct is located below the front volute tongue and extends towards the lower air outlet, and the main air duct forms a main air duct between the first surface and the second surface; along the front-rear direction of the casing, the upper air duct and the flow dividing piece form an upper air duct which is communicated with the upper air outlet; along the front-rear direction of the casing, the lower air duct and the flow dividing piece form a lower air duct which is communicated with the lower air outlet; the guide vane is rotatably arranged in the main air duct, the guide vane has a guide surface, and the guide surface is a concave arc surface; when the guide vane is in the first position, the concave arc surface guides the airflow in the main air duct to the upper air duct. The application can reduce the air volume loss in the upper air outlet state, thereby improving the refrigeration or heating effect of the wall-mounted air conditioner indoor unit in the upper air outlet state.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a wall-mounted air conditioning indoor unit. Background Technology

[0002] In the technological development of wall-mounted air conditioner indoor units, multiple air outlets have become the mainstream design direction to adapt to the usage needs of different seasons and the user's pursuit of comfort. Currently, the commonly adopted solution in the industry is to set the upper air outlet on the top front side of the wall-mounted air conditioner indoor unit casing and the lower air outlet on the bottom of the casing, forming an upper air duct and a lower air duct within the casing. The upper air duct connects to the upper air outlet, and the lower air duct connects to the lower air outlet. An air guide component is installed inside the casing, and by adjusting the position of this air guide component, the wall-mounted air conditioner indoor unit can switch between three operating states: upper air outlet, lower air outlet, and simultaneous upper and lower air outlet.

[0003] However, when the air guide is adjusted to the position corresponding to the upper air outlet state, there is a loss of air volume in the process of the air guide guiding the airflow to the upper air duct, which affects the cooling or heating effect of the wall-mounted air conditioner indoor unit in the upper air outlet state. Utility Model Content

[0004] This application discloses a wall-mounted air conditioner indoor unit that can reduce air volume loss when the air is in the upward air outlet state, thereby improving the cooling or heating effect of the wall-mounted air conditioner indoor unit in the upward air outlet state.

[0005] To achieve the above objectives, this application discloses a wall-mounted air conditioner indoor unit, comprising:

[0006] A housing, the housing having an air inlet, an upper air outlet, and a lower air outlet, the air inlet being located at the top front side of the housing, and at least a portion of the lower air outlet being located at the bottom of the housing, the housing containing:

[0007] A heat exchanger for exchanging heat with the airflow flowing into the housing;

[0008] A fan is used to introduce airflow into the housing through the air inlet of the housing, and after heat exchange by the heat exchanger, it is sent into the room through the upper air outlet and / or the lower air outlet.

[0009] Diverter a, which is disposed on the front side of the fan, enables the airflow blown to the diverter a to flow upward or downward;

[0010] A volute, disposed within the housing, contains a heat exchange air duct. The air inlet of the heat exchange air duct is connected to the air inlet of the housing, and the air outlet of the heat exchange air duct is directed towards the flow divider a. The volute includes:

[0011] The anterior cochlear tongue, comprising:

[0012] The first surface gradually slopes downwards from the front side of the housing towards the rear side;

[0013] The second side gradually slopes upward from the rear side of the housing towards the front side;

[0014] A cochlear throat surface, wherein the cochlear throat surface is connected between the first surface and the second surface;

[0015] The main air duct component is located below the front volute and extends toward the lower air outlet. The main air duct component forms a main air duct with the first surface and the second surface. The air inlet end of the main air duct is connected to the air outlet side of the fan.

[0016] An upper air duct is located above the front volute and extends toward the upper air outlet. Along the front-rear direction of the housing, the upper air duct and the diverter a form an upper air duct that communicates with the upper air outlet. The upper air duct is configured to guide the airflow entering the upper air duct to be sent outward through the upper air outlet.

[0017] The lower air duct is located below the front volute and extends toward the lower air outlet. Along the front-rear direction of the housing, the lower air duct and the diverter a form a lower air duct that communicates with the lower air outlet. The lower air duct is configured to guide the airflow entering the lower air duct to be sent outward through the lower air outlet.

[0018] An air guide component is rotatably disposed within the main air duct;

[0019] The air guide has an air guide surface, which is a concave arc surface. When the air guide is in the first position, the concave arc surface guides the airflow in the main air duct to the upper air duct. The first position is configured so that the air guide closes the lower air duct, so that the upper air duct is connected to the air outlet of the main air duct.

[0020] Because the air guide has a concave arc-shaped air guide surface, when the air guide is in the first position, the concave arc-shaped air guides the airflow in the main air duct to the upper air duct. Compared with flat or other shaped air guide surfaces, the concave arc-shaped air guide can guide the airflow more smoothly, avoiding the formation of vortices during the airflow turning process, thus avoiding the generation of vortices and allowing the airflow guided by the air guide surface to enter the upper air duct more smoothly.

[0021] In addition, the shape of the concave arc surface is more in line with the direction of airflow, which can reduce the resistance of airflow during the air guiding process. According to the principles of aerodynamics, the smooth curved surface can reduce the frictional resistance and pressure resistance during airflow, allowing the airflow to pass through the air guide more efficiently, thereby reducing the loss of air volume during the air guiding process, and thus improving the cooling or heating effect of the indoor unit of the wall-mounted air conditioner in the air outlet state.

[0022] In one possible implementation, the housing includes a flow divider, and the upper air outlet is disposed on the flow divider;

[0023] The air guide surface has a first end and a second end. When the air guide is in the first position, there is a preset gap between the first end and the diverter, and the second end abuts against the inner wall of the main air duct.

[0024] This creates a preset gap between the first end and the diverter, which provides a "pressure relief channel" for the airflow. A small amount of airflow with slow turning speed and high velocity can naturally flow through the gap, avoiding the accumulation of local high pressure. At the same time, the preset gap makes the flow cross-section of the airflow from the main duct to the upper duct more gentle, reducing instantaneous pressure fluctuations and suppressing the generation of periodic pulsating noise from the source.

[0025] By designing the second end to abut against the inner wall of the main air duct, a "sealed fit" is achieved between the air guide and the main air duct, completely blocking the leakage path of airflow to the lower air duct, ensuring that the airflow of the main air duct is guided to the upper air duct to the greatest extent, and reducing the air volume loss caused by insufficient sealing.

[0026] In one possible implementation, the angle between the tangent at the first end and the vertical direction is a, the angle between the tangent at the middle of the air guide surface and the vertical direction is b, and the angle between the tangent at the second end and the vertical direction is c, where a≤b≤c.

[0027] Since a≤b≤c, the tangent angle of the air guide surface gradually transitions from a at the first end (near the splitter side), through b in the middle, to c at the second end (against the inner wall of the main air duct), and shows an increasing trend. This means that the curvature of the air guide surface gradually “contracts” along the airflow direction (from the main air duct to the upper air duct). The tangent angle a at the first end is smaller (closer to the vertical direction), which can guide the airflow away from the air guide surface and contact the splitter, avoiding the loss of airflow due to excessive pressure resistance caused by excessive airflow turning angle.

[0028] As the angles at the middle and second ends gradually increase (b≤c), the airflow changes direction from the main duct to the windward surface, allowing the wall-attached flow state to continue until the airflow enters the upwind duct. This enables the airflow in the main duct to naturally change direction along the arc contour of the windward surface, avoiding sudden changes in direction. This reduces the probability of vortex generation, reduces local resistance loss, and allows more airflow to be effectively introduced into the upwind duct.

[0029] In one possible implementation, 25°≤a≤35°.

[0030] This ensures that the angle between the tangent at the first end and the vertical direction is between 25° and 35°, which allows for a smoother transition between the air guide surface and the splitter, thus avoiding airflow loss due to a large angle between the air guide surface and the splitter.

[0031] In one possible implementation, a = 28°.

[0032] Therefore, when the angle between the tangent at the first end and the vertical direction is 28°, it can avoid the transition between the middle of the air guide surface and the first end being too gentle, and it can also avoid the large angle between the first end and the splitter, thereby reducing the air volume loss of the air guide surface in the process of guiding the airflow.

[0033] In one possible implementation, 60°≤b≤70°.

[0034] By taking all factors into consideration, the angle between the tangent in the middle of the air guide surface and the vertical direction is kept between 60° and 70°. This avoids both an excessively steep middle section and an excessively flat middle section, thus maintaining an effective airflow.

[0035] In one possible implementation, 80°≤c≤100°

[0036] Therefore, by taking all factors into consideration, the angle between the tangent at the second end and the vertical direction is between 80° and 100°. This reduces airflow loss and avoids producing breathing noise.

[0037] In one possible implementation, c = 90°.

[0038] When the angle between the tangent at the second end and the vertical direction is 90°, the tangent at the second end is horizontal, which makes the airflow at the second end of the guide surface highly consistent with the airflow at the outlet end of the main air duct. This avoids the "angle of attack impact" when the angle is too large and the "understood turning" when the angle is too small. The airflow can enter the guiding path with extremely low resistance, closely following the guide surface. There is almost no impact zone or large-area vortex generated, which effectively preserves the initial kinetic energy of the airflow and ensures that more airflow is guided to the upwind duct, reducing airflow loss.

[0039] In one possible implementation, the preset gap is m, where 15mm ≤ m ≤ 30mm.

[0040] Therefore, through comprehensive consideration, the preset gap is set between 15mm and 30mm. This avoids both the problem of insufficient airflow caused by an excessively small preset gap and the problem of excessively large airflow loss caused by an excessively large preset gap.

[0041] In one possible implementation, the housing further includes:

[0042] A first air guide plate is rotatably disposed at the upper air outlet to open or close the upper air outlet.

[0043] The second air guide plate is rotatably disposed at the lower air outlet to open or close the lower air outlet.

[0044] As can be seen, by setting the first and second air guide plates, the opening and closing of the upper and lower air outlets can be flexibly controlled. This allows the upper and / or lower air outlets to be closed when not in use, maintaining the product's aesthetics and preventing dust and impurities from entering the casing through the upper and / or lower air outlets when they are not in use, thus extending the product's service life.

[0045] Compared with the prior art, the beneficial effects of this application are as follows:

[0046] Because the air guide has a concave arc-shaped air guide surface, when the air guide is in the first position, the concave arc-shaped air guides the airflow in the main air duct to the upper air duct. Compared with flat or other shaped air guide surfaces, the concave arc-shaped air guide can guide the airflow more smoothly, avoiding the formation of vortices during the airflow turning process, thus avoiding the generation of vortices and allowing the airflow guided by the air guide surface to enter the upper air duct more smoothly.

[0047] In addition, the shape of the concave arc surface is more in line with the direction of airflow, which can reduce the resistance of airflow during the air guiding process. According to the principles of aerodynamics, the smooth curved surface can reduce the frictional resistance and pressure resistance during airflow, allowing the airflow to pass through the air guide more efficiently, thereby reducing the loss of air volume during the air guiding process, and thus improving the cooling or heating effect of the indoor unit of the wall-mounted air conditioner in the air outlet state. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a first-view structural schematic diagram of the wall-mounted air conditioner indoor unit provided in the embodiments of this application;

[0050] Figure 2 This is a cross-sectional view of the wall-mounted air conditioner indoor unit provided in the embodiment of this application;

[0051] Figure 3 yes Figure 1 Cross-sectional view at point BB (air guide in the open position);

[0052] Figure 4 yes Figure 1 Cross-sectional view at point BB (air guide located in the first position);

[0053] Figure 5 yes Figure 1 Cross-sectional view at point BB (air guide located in the second position);

[0054] Figure 6 yes Figure 1 Cross-sectional view at point BB (air guide located at the flow splitting position);

[0055] Figure 7 This is a schematic diagram of the structure of the air guide provided in the embodiment of this application;

[0056] Figure 8 yes Figure 4 A magnified view of a portion of point A in the middle;

[0057] Figure 9 This is a structural schematic diagram of the wall-mounted air conditioner indoor unit from a second perspective, provided in an embodiment of this application.

[0058] Figure 10 This is an exploded view of the indoor unit of a wall-mounted air conditioner provided in an embodiment of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 100-Wall-mounted air conditioner indoor unit;

[0061] 110 - Housing; 111 - Housing air inlet; 112 - Upper air outlet; 113 - Lower air outlet; 110a - Flow divider;

[0062] 120 - Heat exchanger;

[0063] 130 - Fan;

[0064] 140 - Main air duct component; 141 - Main air duct;

[0065] 150 - Upwind component; 151 - Upwind path;

[0066] 160 - Downwind component; 161 - Downwind duct;

[0067] 170 - Air guide component; 171 - Air guide surface; 172 - First end; 173 - Second end;

[0068] 181 - First air guide plate; 182 - Second air guide plate;

[0069] 190 - volute; 191 - anterior volute tongue; 1911 - first surface; 1912 - second surface; 1913 - volute throat surface; 192 - heat exchange air duct. Detailed Implementation

[0070] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0071] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0072] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0073] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0074] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0075] As described in the background section, an upper air outlet is provided on the top front side of the casing of the wall-mounted air conditioner indoor unit, and a lower air outlet is provided on the bottom of the casing. An upper air duct and a lower air duct are formed in the casing. The upper air duct is connected to the upper air outlet, and the lower air duct is connected to the lower air outlet. An air guide is provided inside the casing. By adjusting the position of the air guide, the wall-mounted air conditioner indoor unit can switch between three operating states: upper air outlet state, lower air outlet state, and simultaneous upper and lower air outlet state.

[0076] However, when the air guide is adjusted to the position corresponding to the upper air outlet state, there is a loss of air volume in the process of the air guide guiding the airflow to the upper air duct, which affects the cooling or heating effect of the wall-mounted air conditioner indoor unit in the upper air outlet state.

[0077] Based on this, the present application provides a wall-mounted air conditioner indoor unit that can reduce air volume loss when the air is in the upward air outlet state, thereby improving the cooling or heating effect of the wall-mounted air conditioner indoor unit in the upward air outlet state.

[0078] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0079] See Figure 1 This application provides a wall-mounted air conditioner indoor unit 100, which includes a housing 110, and the housing 110 houses various functional components of the wall-mounted air conditioner indoor unit.

[0080] The wall-mounted air conditioner indoor unit 100 in this embodiment is also commonly referred to as a split-type air conditioner or wall-mounted unit. It is a type of air conditioner that is mounted on an indoor wall. It is currently the most common and widely used type of air conditioner in homes and small commercial spaces. It has advantages such as high cost performance, space saving, flexibility and convenience, quiet operation and energy saving.

[0081] Optional, see Figure 2 The housing 110 is provided with a housing air inlet 111, an upper air outlet 112 and a lower air outlet 113. The housing air inlet 111 is located on the top front side of the housing 110, and at least part of the lower air outlet 113 is located on the bottom of the housing 110.

[0082] The air inlet 111 is used to guide airflow from the external environment into the interior of the housing 110, and to allow the airflow to flow into the room through the upper air outlet 112 and / or the lower air outlet 113.

[0083] Optionally, an air intake grille can be installed at the air inlet 111 of the casing to block foreign objects and dust from entering the interior of the casing 110, and to make the appearance of the wall-mounted air conditioner indoor unit 100 neater and more aesthetically pleasing.

[0084] Optional, see Figure 2 A heat exchanger 120 is installed inside the casing 110, which is used to exchange heat with the airflow flowing into the casing 110.

[0085] Heat exchanger 120 is a heat exchanger that utilizes the characteristic of liquid low-temperature refrigerant easily evaporating under low pressure. By absorbing heat from the medium being cooled, it lowers the temperature of the surrounding air, thus achieving a cooling effect. The cooled air after passing through heat exchanger 120 is returned to the room through an air supply system, providing a comfortable indoor environment. Especially in the hot summer, the cooling effect of heat exchanger 120 can significantly reduce indoor temperature and improve people's living comfort. Optionally, heat exchanger 120 can be a finned heat exchanger, a multi-stage evaporator, etc.

[0086] Optional, see Figure 2 The casing 110 is also equipped with a fan 130. The fan 130 is used to introduce airflow into the casing 110 through the casing air inlet 111, and after heat exchange by the heat exchanger 120, it is sent into the room through the upper air outlet 112 and / or the lower air outlet 113.

[0087] The fan 130 can introduce airflow into the interior of the casing 110, so that the airflow can be heat-exchanged by the heat exchanger 120, and then the heat-exchanged airflow can be sent into the room through the upper air outlet 112 and / or the lower air outlet 113 under the action of the fan 130.

[0088] Among them, fan 130 can be a cross-flow fan, centrifugal fan, etc.

[0089] Optionally, a flow divider 110a is also provided inside the housing 110. The flow divider 110a is located on the front side of the fan and can make the airflow blown to the flow divider 110a flow upward or downward.

[0090] The diverter 110a can be a front panel or a plate-like structure located inside the front panel.

[0091] By providing a flow divider 110a, the airflow blown onto the flow divider 110a can be divided, thereby allowing the flow divider 110a to flow upward or downward.

[0092] Optionally, a volute 190 is also provided inside the housing 110. The volute 190 is located inside the housing 110 and forms a heat exchange air duct 192. The air inlet of the heat exchange air duct 192 is connected to the air inlet of the housing 110, and the air outlet of the heat exchange air duct 192 is directed toward the splitter 110a.

[0093] Therefore, by setting the volute 190, the airflow entering through the air inlet of the housing 110 can be heated (in winter) or cooled (in summer) to form air conditioning air for regulating the indoor temperature.

[0094] Optionally, the volute 190 includes a front volute tongue 191, which includes a first surface 1911, a second surface 1912, and a volute throat surface 1913. The first surface 1911 gradually slopes downward from the front side to the rear side of the housing 110; the second surface 1912 gradually slopes upward from the rear side to the front side of the housing 110; and the volute throat surface 1913 connects the first surface 1911 and the second surface 1912.

[0095] As a result, the airflow inside the volute 190 is heated or cooled by the heat exchange duct 192 and then guided to the upper air outlet and / or lower air outlet through the first surface 1911, the volute throat surface 1913 and the second surface 1912.

[0096] Alternatively, the fan can be installed in the heat exchange channel, thereby driving the airflow in the heat exchange duct 192 to be directed outward sequentially along the first surface 1911, the volute surface 1913 and the second surface 1912, and finally flowing into the indoor space through the upper air outlet and / or the lower air outlet.

[0097] Optional, see Figures 2 to 6The housing 110 also includes a main air duct component 140, an upper air duct component 150, a lower air duct component 160, and an air guide component 170. The main air duct component 140 is located below the front volute 191 and extends towards the lower air outlet 113. The main air duct component 140 forms a main air duct 141 with the first surface 1911 and the second surface 1912. The air inlet end of the main air duct 141 is connected to the air outlet side of the fan 130. The upper air duct component 150 is located above the front volute 191 and extends towards the upper air outlet 112. Along the front-rear direction of the housing 110, the upper air duct component 150 and the diverter component 110a form an upper air duct 151 that communicates with the upper air outlet 112. The upper air duct 151 is configured to guide the airflow entering the upper air duct 151 outward through the upper air outlet 112; the lower air duct component 160 is located below the front volute tongue 191 and extends towards the lower air outlet 113, forming a lower air duct 161 communicating with the lower air outlet 113 between the lower air duct component 160 and the diverter component 110a, and the lower air duct 161 is configured to guide the airflow entering the lower air duct 161 outward through the lower air outlet 113; the air guide component 170 is rotatably disposed within the main air duct 141, and the air guide component 170 can switch between an open position, a first position, a second position, and a diverter position; such as Figure 3 As shown, when the air guide 170 is in the open position, both the upper air duct 151 and the lower air duct 161 are connected to the air outlet of the main air duct 141; Figure 4 As shown, when the air guide 170 is in the first position, the air guide 170 can close the lower air duct 161, so that the upper air duct 151 is connected to the air outlet of the main air duct 141; as Figure 5 As shown, when the air guide 170 is in the second position, the air guide 170 can close the upper air duct 151, so that the lower air duct 161 is connected to the air outlet of the main air duct 141; as Figure 6 As shown, when the air guide 170 is in the diversion position, the air guide 170 is configured to divert the airflow sent out by the main air duct 141 so that the diverted airflow enters the upper air duct 151 and the lower air duct 161 respectively.

[0098] When the top air outlet mode needs to be activated, first control the air guide 170 to rotate to the first position. At this time, the main air duct 141 is connected to the upper air duct 151. In this way, the air guide 170 can guide the airflow sent from the main air duct 141 into the upper air duct 151, and finally introduce it into the room through the top air outlet 112. Especially when cooling in summer, according to the physical principle of "hot air rises and cold air sinks", the upward-blown cold airflow will naturally diffuse from the top to the bottom, forming a complete airflow circulation from top to bottom, which can quickly reduce the temperature of the entire room and avoid the problem of slow cooling in local areas.

[0099] When the down-ventilation mode needs to be activated, first control the air guide 170 to rotate to the second position. At this time, the main air duct 141 and the down-ventilation duct 161 are connected. In this way, the airflow sent from the main air duct 141 can be guided to the down-ventilation duct 161 through the air guide 170, and finally introduced into the room through the down-ventilation outlet 113. Especially when heating is needed in winter, hot airflow tends to accumulate upwards. The down-ventilation mode can directly deliver hot air to the ground and the height of human activity, achieving the effect of warm feet and a warm body.

[0100] When an up-and-down airflow mode is required, the user can choose to prioritize the down-flow mode, such as placing the air guide 170 in the diversion position, or prioritize the up-flow mode, such as placing the air guide 170 in the open position, to meet different user needs.

[0101] It should be noted that the air guide 170 can achieve both upward and downward airflow modes in both the diversion and open positions. Optionally, in the diversion position, the air guide 170 can achieve an airflow pattern with upward airflow as the primary mode and downward airflow as the secondary mode; in the open position, it can achieve an airflow pattern with outflow as the primary mode and upward airflow as the secondary mode. That is, when the air guide 170 is in the diversion position, it enables the wall-mounted air conditioner indoor unit 100 to have an airflow pattern with the upper part as the primary mode and downward airflow as the secondary mode, accelerating the diffusion of cold air. When the air guide 170 is in the open position, it enables the wall-mounted air conditioner indoor unit 100 to have an airflow pattern with the lower part as the primary mode and upward airflow as the secondary mode, promoting the circulation of hot air without the need for frequent mode switching. Of course, the air guide 170 can achieve an airflow pattern with the upper part as the primary mode and downward airflow as the secondary mode in the open position, and an airflow pattern with the outflow as the primary mode and upward airflow as the secondary mode in the diversion position.

[0102] In some possible embodiments, see Figure 4 The air guide 170 has an air guide surface 171, which is a concave arc surface. When the air guide 170 is in the first position, the concave arc surface guides the airflow in the main air duct 141 to the upper air duct 151.

[0103] Since the air guide 170 has an air guide surface 171, which is a concave arc surface, when the air guide 170 is in the first position, the concave arc surface guides the airflow in the main air duct 141 to the upper air duct 151. Compared with a flat or other shaped air guide surface 171, the concave arc surface can guide the airflow more smoothly, avoid the formation of vortices during the airflow turning process, and thus avoid the generation of vortices, so that the airflow guided by the air guide surface 171 can enter the upper air duct 151 more smoothly.

[0104] In addition, the shape of the concave arc surface is more in line with the direction of airflow, which can reduce the resistance of airflow during the air guiding process. According to the principle of aerodynamics, the smooth curved surface can reduce the frictional resistance and pressure difference resistance when the air flows, so that the airflow can pass through the air guide 170 more efficiently, thereby reducing the loss of air volume during the air guiding process, and thus improving the cooling or heating effect of the wall-mounted air conditioner indoor unit 100 in the air outlet state.

[0105] In some possible embodiments, see Figure 7 and Figure 8 The housing 110 includes a diverter 110a, and an upper air outlet 112 is disposed on the diverter 110a; the air guide surface 171 has a first end 172 and a second end 173. When the air guide 170 is in the first position, there is a preset gap between the first end 172 and the diverter 110a, and the second end 173 abuts against the inner wall of the main air duct 141.

[0106] Among them, the first end 172 of the air guide surface 171 is close to the diverter 110a when the air guide 170 is in the first position, and the second end 173 is away from the end of the diverter 110a.

[0107] If the first end 172 of the air guide surface 171 is completely in contact with the flow divider 110a, the high-speed airflow guided by the concave arc surface will form a "rigid obstruction" at the contact point. Some airflow will be trapped due to delayed turning, forming an instantaneous high-pressure zone at the connection between the air guide surface 171 and the flow divider 110a. When the pressure in the high-pressure zone exceeds the turning resistance of the airflow, the airflow will "break through" the contact area, forming a vortex, which will then generate low-frequency surging noise. Based on this, a preset gap is provided between the first end 172 and the flow divider 110a. The preset gap provides a "pressure relief channel" for the airflow. A small amount of airflow with delayed turning and high speed can be naturally discharged through the gap, avoiding local high-pressure accumulation. At the same time, the preset gap makes the change in the flow cross section of the airflow from the main air duct 141 to the upper air duct 151 more gentle, reducing instantaneous pressure fluctuations and suppressing the generation of periodic pulsating noise from the source.

[0108] In addition, when the air guide 170 is in the first position, it is necessary to "close the downdraft duct 161 and open the updraft duct 151". If there is a gap between the second end 173 of the air guide surface 171 and the inner wall of the main duct 141, some of the airflow in the main duct 141 will leak from the gap to the downdraft duct 161 instead of entering the updraft duct 151, resulting in airflow bypass loss. Therefore, by designing the second end 173 to abut against the inner wall of the main duct 141, the air guide 170 and the main duct 141 are "sealed", which completely blocks the leakage path of the airflow to the downdraft duct 161, ensuring that the airflow in the main duct 141 is guided to the updraft duct 151 to the maximum extent, and reducing the airflow loss caused by insufficient sealing.

[0109] In some possible embodiments, see Figure 7The angle between the tangent at the first end 172 and the vertical direction is a, the angle between the tangent at the middle of the air guide surface 171 and the vertical direction is b, and the angle between the tangent at the second end 173 and the vertical direction is c, where a≤b≤c.

[0110] Among them, see Figure 7 The tangent direction of the first end 172 is as indicated by arrow x1, and the vertical direction is as indicated by arrow y. The tangent direction of the second end 173 is as indicated by arrow x2, and the tangent direction of the middle part of the air guide surface 171 is as indicated by arrow x3.

[0111] Since a≤b≤c, the tangent angle of the air guide surface 171 gradually transitions from a on the side of the first end 172 near the diverter 110a, through b in the middle, to c on the side of the second end 173 abutting the inner wall of the main air duct 141, and shows an increasing trend. This means that the curvature of the air guide surface 171 gradually “contracts” along the airflow direction from the main air duct 141 to the upper air duct 151. The tangent angle a of the first end 172 is smaller and closer to the vertical direction, which can guide the airflow away from the air guide surface 171 and contact the diverter 110a, avoiding the loss of airflow due to excessive pressure resistance caused by excessive airflow turning angle.

[0112] As the angles at the middle and second ends 173 gradually increase from b≤c, the airflow changes direction from the main duct 141 to the guide surface 171, allowing the wall-attached flow state to continue until the airflow enters the upwind duct 151. This enables the airflow in the main duct 141 to naturally change direction along the arc contour of the guide surface 171, avoiding sudden changes in direction, thereby reducing the probability of vortex generation and reducing local resistance loss, and thus allowing more airflow to be effectively introduced into the upwind duct 151.

[0113] In some possible embodiments, 25° ≤ a ≤ 35°.

[0114] If the angle between the tangent at the first end 172 and the vertical direction is less than 25°, it means that the air guide surface 171 is steeper near the first end 172. In this case, the airflow will have a large turn and greater local resistance as it flows from the middle to the first end 172, which will easily generate vortices and cause airflow loss. If the angle between the tangent at the first end 172 and the vertical direction is greater than 35°, it means that the air guide surface 171 is relatively flat near the first section. However, the diverter 110a is a vertical plate, which will result in a large transition angle between the air guide surface 171 and the diverter 110a, which will still cause airflow loss.

[0115] Therefore, by taking all factors into consideration, the angle between the tangent at the first end 172 and the vertical direction is between 25° and 35°. This allows for a smoother transition between the air guide surface 171 and the diverter 110a, thus avoiding airflow loss due to a large angle between the air guide surface 171 and the diverter 110a.

[0116] For example, the angle between the tangent at the first end 172 and the vertical direction can be 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, etc. Those skilled in the art should know that the above are just examples of the angle between the tangent at the first end 172 and the vertical direction, and should not be construed as a limitation on the specific value of the angle between the tangent at the first end 172 and the vertical direction.

[0117] In some possible embodiments, a = 28°.

[0118] Therefore, when the angle between the tangent at the first end 172 and the vertical direction is 28°, it can avoid the transition between the middle of the air guide surface 171 and the first end 172 being too gentle, and it can also avoid the large angle between the first end 172 and the diverter 110a, thereby reducing the air volume loss of the air guide surface 171 in the process of guiding the airflow.

[0119] In some possible embodiments, 60°≤b≤70°.

[0120] If the angle between the tangent in the middle of the air guide surface 171 and the vertical direction is less than 60°, it means that the curvature of the middle of the air guide surface 171 is steeper, which cannot provide sufficient turning force for the airflow. As a result, some airflow still flows in the original direction of the main air duct 141, and the effective air volume is reduced. If the angle between the tangent in the middle of the air guide surface 171 and the vertical direction is greater than 70°, it means that the curvature of the middle of the air guide surface 171 is gentler and closer to the horizontal direction. When the airflow approaches the second end 173 from the main air duct 141, and c≥b and b is too large, the tangent angle of the air guide surface 171 increases sharply. Due to inertia, the airflow is difficult to quickly fit the suddenly gentle middle air guide surface 171. It is easy to form a separation zone between the air guide surface 171 and the mainstream airflow. A large number of vortices will be generated in the separation zone. The vortices will consume the kinetic energy of the airflow, resulting in a reduction in the effective air volume entering the upper air duct 151.

[0121] Therefore, by taking all factors into consideration, the angle between the tangent in the middle of the air guide surface 171 and the vertical direction is between 60° and 70°. This avoids both the middle of the air guide surface 171 being too steep and the middle being too flat, thus maintaining an effective airflow.

[0122] For example, the angle between the tangent at the center of the wind guide surface 171 and the vertical direction can be 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, etc. Those skilled in the art should know that the above are just examples of the angle between the tangent at the center of the wind guide surface and the vertical direction, and should not be construed as limiting the specific value of the angle between the tangent at the center of the wind guide surface and the vertical direction.

[0123] In some possible embodiments, 80°≤c≤100°.

[0124] If the angle between the tangent of the second end 173 and the vertical direction is less than 80°, it means that the angle between the tangent of the second end 173 and the vertical direction is too small. The small angle makes it impossible for the second end 173 of the air guide surface 171 to provide sufficient upward turning force for the airflow. The flow path of the airflow on the air guide surface 171 is too straight and it is difficult to complete the turning smoothly. Some airflow will continue to impact the middle and rear part of the air guide surface 171 or the inner wall of the main air duct 141 due to inertia, forming vortices. Other airflow may not be able to effectively enter the upper air duct 151 due to insufficient turning, resulting in airflow loss.

[0125] If the angle between the tangent of the second end 173 and the vertical direction is greater than 100°, it means that the angle between the tangent of the second end 173 and the vertical direction is too large. An excessively large angle will cause a violent "angle of attack" between the second end 173 of the air guide surface 171 and the outlet end of the main air duct 141. The airflow cannot smoothly adhere to the air guide surface 171. Instead, a large area of ​​impact zone and vortex will be formed at the second end 173 of the air guide surface 171. This will cause the airflow pressure to fluctuate rapidly in the local area, forming a pulse-like pressure change. This will then excite the vibration of structures such as the air guide 170 and the inner wall of the main air duct 141, producing obvious "breathing noise".

[0126] Therefore, by taking all factors into consideration, the angle between the tangent of the second end 173 and the vertical direction is between 80° and 100°. This reduces airflow loss and avoids generating breathing noise.

[0127] For example, the angle between the tangent of the second end 173 and the vertical direction can be 80°, 82°, 84°, 86°, 88°, 89°, 90°, 93°, 95°, 97°, 100°, etc. Those skilled in the art should know that the above are just examples of the angle between the tangent of the second end 173 and the vertical direction, and should not be construed as limiting the specific value of the angle between the tangent of the second end 173 and the vertical direction.

[0128] In some possible embodiments, c = 90°.

[0129] When the angle between the tangent of the second end 173 and the vertical direction is 90°, the tangent of the second end 173 is horizontal, which makes the second end 173 of the guide surface 171 highly consistent with the airflow at the outlet end of the main air duct 141. This avoids the "angle of attack impact" when the angle is too large and the "understood turning" when the angle is too small. The airflow can enter the guiding path with extremely low resistance by adhering to the guide surface 171. There is almost no impact zone and large-area vortex generated, which effectively preserves the initial kinetic energy of the airflow and ensures that more airflow is guided to the upwind duct 151, reducing airflow loss.

[0130] In some possible embodiments, see Figure 8 The preset gap is m, 15mm≤m≤30mm.

[0131] If the preset gap is less than 15mm, it means that the preset gap is too narrow. During the process of introducing airflow into the upper air duct 151 from the air guide surface 171, because the width of the main air duct is greater than the width of the upper air duct 151, some airflow returns and forms a backflow airflow at the first end 172 and the diverter 110a. If the preset gap is too narrow, the backflow airflow will not be able to pass through the preset gap, thus forming a vortex breathing at the first end and the diverter 110a.

[0132] If the preset gap is greater than 30mm, it means that the preset gap is too wide, which will result in an excessive distance between the first end 172 and the diverter 110a. This will make the airflow leaving the first end 172 susceptible to the influence of the return airflow, forming an airflow obstruction at the first end 172, thereby increasing the airflow loss.

[0133] Therefore, through comprehensive consideration, the preset gap is set between 15mm and 30mm. This avoids both the problem of insufficient airflow caused by an excessively small preset gap and the problem of excessively large airflow loss caused by an excessively large preset gap.

[0134] For example, the preset gap between the first end 172 and the diverter 110a can be 15mm, 17mm, 19mm, 20mm, 22mm, 24mm, 25mm, 27mm, 29mm, 30mm, etc. Those skilled in the art should know that the above are just examples of the preset gap between the first end 172 and the diverter 110a, and should not be construed as limiting the specific value of the preset gap between the first end 172 and the diverter 110a.

[0135] In some possible embodiments, see Figure 9 and Figure 10 The housing 110 is also provided with a first air guide plate 181 and a second air guide plate 182. The first air guide plate 181 is rotatably disposed at the upper air outlet 112 to open or close the upper air outlet 112; the second air guide plate 182 is rotatably disposed at the lower air outlet 113 to open or close the lower air outlet 113.

[0136] Since the first air guide plate 181 is rotatably disposed at the upper air outlet 112 and the second air guide plate 182 is rotatably disposed at the lower air outlet 113, when the air guide component 170 is in the first position, the second air guide plate 182 can be rotated to close the lower air outlet 113 and the first air guide plate 181 can be rotated to open the upper air outlet 112 to achieve an upper air outlet state. When the air guide component 170 is in the second position, the first air guide plate 181 can be rotated to close the upper air outlet 112 and the second air guide plate 182 can be rotated to open the lower air outlet 113 to achieve a lower air outlet state. When the air guide component 170 is in the open position or the diversion position, the first air guide plate 181 can be rotated to open the upper air outlet 112 and the second air guide plate 182 can be rotated to open the lower air outlet 113 to achieve an upper and lower air outlet state.

[0137] As can be seen, by setting the first air guide plate 181 and the second air guide plate 182, the opening or closing of the upper air outlet 112 and the lower air outlet 113 can be flexibly controlled. Thus, when the upper air outlet 112 and / or the lower air outlet 113 are not in use, they can be closed, which can maintain the aesthetics of the product and prevent dust, impurities and other contaminants from entering the housing 110 through the upper air outlet 112 and / or the lower air outlet 113 when they are not in use, thereby extending the service life of the product.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A wall-mounted air conditioner indoor unit (100), characterized in that, include: A housing (110) is provided with a housing air inlet (111), an upper air outlet (112), and a lower air outlet (113). The housing air inlet (111) is located at the top front side of the housing (110), and at least a portion of the lower air outlet (113) is located at the bottom of the housing (110). The housing (110) contains: A heat exchanger (120) is used to exchange heat with the airflow flowing into the housing (110); A fan (130) is used to introduce airflow into the housing (110) through the housing air inlet (111), and after heat exchange by the heat exchanger (120), it is sent into the room through the upper air outlet (112) and / or the lower air outlet (113); A flow divider (110a) is disposed on the front side of the fan (130) and can cause the airflow blown to the flow divider (110a) to flow upward or downward. A volute (190) is disposed within the housing (110). A heat exchange duct (192) is formed within the volute (190). The air inlet of the heat exchange duct (192) is connected to the air inlet of the housing (110), and the air outlet of the heat exchange duct (192) is directed toward the distributor (110a). The volute (190) includes: Anterior cochlear tongue (191), said anterior cochlear tongue (191) comprising: The first surface (1911) gradually slopes downward from the front side to the rear side of the housing (110); The second surface (1912) gradually slopes upward from the rear side of the housing (110) towards the front side; A cochlear throat surface (1913) is connected between the first surface (1911) and the second surface (1912); A main air duct component (140) is located below the front volute (191) and extends toward the lower air outlet (113). The main air duct component (140) forms a main air duct (141) with the first surface (1911) and the second surface (1912). The air inlet end of the main air duct (141) is connected to the air outlet side of the fan (130). An upper air duct (150) is located above the front volute (191) and extends toward the upper air outlet (112). Along the front-rear direction of the housing (110), the upper air duct (150) and the diverter (110a) form an upper air duct (151) communicating with the upper air outlet (112). The upper air duct (151) is configured to guide the airflow entering the upper air duct (151) to be delivered outward through the upper air outlet (112). A lower air duct (160) is located below the front volute (191) and extends toward the lower air outlet (113) along the front-rear direction of the housing (110). The lower air duct (160) and the diverter (110a) form a lower air duct (161) communicating with the lower air outlet (113). The lower air duct (161) is configured to guide the airflow entering the lower air duct (161) to be delivered outward through the lower air outlet (113). An air guide (170) is rotatably disposed within the main air duct (141); The air guide (170) has an air guide surface (171), which is a concave arc surface. When the air guide (170) is in the first position, the concave arc surface guides the airflow in the main air duct (141) to the upper air duct (151). The first position is configured such that the air guide (170) closes the lower air duct (161) so that the upper air duct (151) is connected to the air outlet of the main air duct (141).

2. The wall-mounted air conditioner indoor unit (100) according to claim 1, characterized in that, The upper air outlet (112) is disposed on the flow divider (110a); The air guide surface (171) has a first end (172) and a second end (173). When the air guide (170) is in the first position, there is a preset gap between the first end (172) and the diverter (110a), and the second end (173) abuts against the inner wall of the main air duct (141).

3. The wall-mounted air conditioner indoor unit (100) according to claim 2, characterized in that, The angle between the tangent at the first end (172) and the vertical direction is a, the angle between the tangent at the middle of the air guide surface (171) and the vertical direction is b, and the angle between the tangent at the second end (173) and the vertical direction is c, where a≤b≤c.

4. The wall-mounted air conditioner indoor unit (100) according to claim 3, characterized in that, 25°≤a≤35°。 5. The wall-mounted air conditioner indoor unit (100) according to claim 4, characterized in that, a＝28°。 6. The wall-mounted air conditioner indoor unit (100) according to claim 3, characterized in that, 60°≤b≤70°。 7. The wall-mounted air conditioner indoor unit (100) according to claim 3, characterized in that, 80°≤c≤100°。 8. The wall-mounted air conditioner indoor unit (100) according to claim 7, characterized in that, c＝90°。 9. The wall-mounted air conditioner indoor unit (100) according to claim 2, characterized in that, The preset gap is m, where 15mm ≤ m ≤ 30mm.

10. The wall-mounted air conditioner indoor unit (100) according to claim 1, characterized in that, The housing (110) also contains: The first air guide plate (181) is rotatably disposed at the upper air outlet (112) to open or close the upper air outlet (112); The second air guide plate (182) is rotatably disposed at the lower air outlet (113) to open or close the lower air outlet (113).

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