Wall-mounted air conditioner

Abstract

An indoor unit of the wall-mounted air conditioner comprises a machine shell provided with a machine shell air inlet, a machine shell air outlet and a machine shell containing cavity, and the machine shell comprises a rear back plate used for being connected with an indoor wall; the heat exchanger is arranged in the housing accommodating cavity; the cross-flow fan is arranged in the shell containing cavity and located on the side, away from the shell air inlet, of the heat exchanger; the electric heater is arranged in the containing cavity of the machine shell and located between the heat exchanger and the cross-flow fan; the air duct assembly is arranged in the containing cavity of the machine shell and comprises a volute. The rear volute tongue comprises a main body section which is connected with the air inlet end, and the gap between the main body section and the cross-flow fan is larger than that between the air inlet end and the cross-flow fan; the bending section is connected to the end, away from the air inlet end, of the main body section and is bent towards the side, away from the cross-flow fan, of the main body section, and the included angle between the main body section and the bending section is an obtuse angle. By adopting the technical scheme, the cavity sound at the rear volute tongue can be reduced, so that the hearing comfort of a user is better.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and more particularly to a wall-mounted air conditioner. Background Technology

[0002] An air conditioner, also known as an air conditioner, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow of the air inside a building or structure.

[0003] Currently, more and more people are choosing to install air conditioners indoors to regulate the temperature of the indoor air. Wall-mounted air conditioners are one type of air conditioner, and their flexible installation location, high cost-effectiveness, and wide applicability make them the first choice for most families when selecting an air conditioner.

[0004] In existing technologies, reducing the thickness of wall-mounted air conditioners leads to a more limited internal space for the indoor unit. This results in greater airflow resistance within the indoor unit. When the fan drives the airflow to rotate, the intake airflow will separate at the rear volute, causing a large-scale separation vortex to be generated at the rear volute. This separation vortex leads to significant cavity noise, affecting the user experience. Utility Model Content

[0005] This application discloses a wall-mounted air conditioner that can reduce the cavity noise at the rear volute of the indoor unit, thereby improving the user's auditory comfort.

[0006] To achieve the above objectives, some embodiments of this application provide a wall-mounted air conditioner, including:

[0007] An indoor unit, comprising: a casing, the casing having an air inlet and an air outlet, and a casing cavity formed within the casing; the casing including a rear panel for connecting to an indoor wall; a heat exchanger disposed within the casing cavity, the heat exchanger for exchanging heat with airflow passing through the casing air inlet; a cross-flow fan disposed within the casing cavity and located on the side of the heat exchanger away from the casing air inlet, the cross-flow fan for introducing airflow from the casing air inlet into the casing, and after heat exchange by the heat exchanger, delivering it to the room through the casing air outlet; an electric heater disposed within the casing cavity and located between the heat exchanger and the cross-flow fan; and an air duct assembly. A duct assembly is disposed within the housing cavity, and an air duct is formed within the duct assembly. The cross-flow fan is disposed within the air duct. The duct assembly includes: a volute, which is disposed around the side of the cross-flow fan facing the rear panel; and a rear volute tongue, which is disposed at the air inlet end of the volute, the air inlet end being the end of the volute close to the air inlet of the housing. The rear volute tongue includes: a main body section, which is connected to the air inlet end, and the gap between the main body section and the cross-flow fan is greater than the gap between the air inlet end and the cross-flow fan; and a bent section, which is connected to the end of the main body section away from the air inlet end, the bent section bending relative to the main body section towards the side away from the cross-flow fan, and the included angle between the main body section and the bent section is an obtuse angle.

[0008] In this way, under the guiding effect of the bend section, the airflow direction is guided to the air duct between the main body of the rear volute and the cross-flow fan, so that the airflow can enter the space between the main body of the rear volute and the cross-flow fan without deflecting too much. This reduces the area of ​​the separation vortex generated near the rear volute, thereby reducing the cavity noise generated by the separation vortex, lowering the noise level of the indoor unit, and improving the user's listening comfort.

[0009] In some embodiments of this application, the included angle between the main body segment and the bent segment is 120 degrees to 160 degrees.

[0010] In this way, the airflow can smoothly turn when passing through the bend of the rear volute tongue, reducing airflow eddies and swirling, thereby reducing the noise generated by airflow impact. Furthermore, it can reduce the resistance of the airflow during the turning process, which helps the airflow enter the air duct more smoothly and improves the flow efficiency of the airflow.

[0011] In some embodiments of this application, the included angle between the main body segment and the bent segment is 130 degrees to 150 degrees.

[0012] In this way, the bend section can guide the airflow more effectively, making the deflection of the airflow under the guidance of the bend section more gentle and smooth, which is conducive to the smooth entry of the airflow into the air duct between the main body section and the cross-flow fan. Moreover, after being guided by the bend section, the airflow can be more evenly distributed after entering the air duct between the main body section and the cross-flow fan, avoiding the airflow being too concentrated or dispersed, thereby improving the air delivery capacity of the indoor unit.

[0013] In some embodiments of this application, the distance between the main body segment and the outer contour of the cross-flow fan gradually decreases along the direction from the main body segment to the volute.

[0014] Thus, as the spacing gradually decreases, the airflow is gradually compressed and concentrated as it approaches the volute. This helps to increase the airflow speed and pressure, allowing the airflow to enter the volute more effectively and be drawn into the cross-flow fan. This method of concentrating airflow reduces airflow diffusion and turbulence within the duct, improving airflow efficiency.

[0015] Furthermore, the gradually decreasing spacing can reduce airflow leakage between the main body section and the cross-flow fan, ensuring that more airflow is effectively guided into the volute, which helps to improve the air delivery performance of the indoor unit.

[0016] In some embodiments of this application, the minimum distance between the main body segment and the outer contour of the cross-flow fan is 3mm to 8mm along the direction from the main body segment to the volute.

[0017] This design ensures that the airflow is gradually compressed and concentrated as it approaches the volute, increasing its speed and pressure. This allows the airflow to enter the volute more effectively and be drawn into the cross-flow fan. The airflow maintains a stable flow path as it passes through the main body section, preventing airflow separation or vortex phenomena. Furthermore, the 3mm to 8mm spacing ensures smooth airflow while preventing airflow diffusion caused by excessively large gaps.

[0018] In some embodiments of this application, the length of the main body segment extending away from the air inlet end is 10mm to 25mm.

[0019] In this way, the airflow can be effectively guided to smoothly transition into the duct, reducing airflow separation and turbulence, and ensuring smooth airflow.

[0020] In some embodiments of this application, the length of the bent segment extending away from the main body segment is 10mm to 25mm.

[0021] In this way, the bending section can effectively guide the airflow, while ensuring that the main section has enough length to allow the airflow to flow effectively along the main section and concentrate in the air duct between the main section and the cross-flow fan, thus ensuring the air delivery effect of the indoor unit.

[0022] In some embodiments of this application, the posterior volute tongue is integrally formed with the volute shell.

[0023] In this way, the one-piece molded rear volute tongue and volute can optimize the guidance of airflow, making the airflow distribution within the volute more uniform and the airflow path within the volute smoother. This can better guide the airflow, reduce airflow eddies and turbulence, thereby reducing airflow resistance and improving the air delivery performance of the indoor unit.

[0024] In some embodiments of this application, the electric heater is located on the side of the bent section away from the back panel, along the thickness direction of the housing.

[0025] In this way, after passing through the electric heater, the airflow is guided by the electric heater, directing the airflow direction to the front of the bend section, preventing some airflow from entering between the bend section of the rear volute and the rear panel, ensuring that the airflow can enter between the rear volute and the outer contour of the cross-flow fan, thereby ensuring the air volume of the indoor unit.

[0026] In some embodiments of this application, the electric heater includes a plurality of fins, which are spaced apart along the axial direction of the cross-flow fan. The fins are rectangular and include a first edge and a second edge that are parallel to each other. The first edge is disposed toward the front side of the housing, and the second edge is disposed toward the rear side of the housing. The upper end of the second edge is higher than the upper end of the first edge.

[0027] In this way, when the airflow passes through the electric heater, it can be guided by the fins. When the airflow flows out of the electric heater, the airflow direction is already roughly towards the air duct between the main body section of the rear volute tongue and the outer contour of the cross-flow fan. This allows the airflow to enter the space between the main body section and the outer contour of the cross-flow fan without having to deflect the flow direction too much. This reduces the resistance of the airflow during the flow process, making the airflow enter the air duct more smoothly, thereby improving the air supply performance of the indoor unit.

[0028] Compared with the prior art, the beneficial effects of this application are at least as follows:

[0029] This application provides a wall-mounted air conditioner, the indoor unit of which includes a casing, a heat exchanger, a cross-flow fan, an electric heater, and an air duct assembly. The casing has a casing air inlet and a casing air outlet, and forms a casing receiving cavity within the casing. The casing includes a rear panel for connecting to the indoor wall. The heat exchanger is disposed within the casing receiving cavity and is used to exchange heat with the airflow flowing through the casing air inlet. The cross-flow fan is disposed within the casing receiving cavity and located on the side of the heat exchanger opposite to the casing air inlet, and is used to deliver the heat-exchanged airflow into the room through the casing air outlet. The electric heater is disposed within the casing receiving cavity and located between the heat exchanger and the cross-flow fan. The air duct assembly is disposed within the casing receiving cavity. An air duct is formed within the air duct assembly, and a cross-flow fan is disposed within the air duct. The air duct assembly includes: a volute surrounding the side of the cross-flow fan facing the rear panel; and a rear volute tongue disposed at the air inlet end of the volute, the air inlet end being the end of the volute close to the air inlet of the housing. The rear volute tongue includes: a main body section connected to the air inlet end, wherein the gap between the main body section and the cross-flow fan is greater than the gap between the air inlet end and the cross-flow fan; and a bent section connected to the end of the main body section away from the air inlet end, the bent section bending relative to the main body section toward the side away from the cross-flow fan, and the included angle between the main body section and the bent section being an obtuse angle. In this way, the bend in the rear volute tongue can guide the airflow. After the airflow enters the housing cavity from the air inlet, the airflow, after being heated by the heat exchanger, can change its flow direction under the guidance of the bend to the air duct between the main body of the rear volute tongue and the cross-flow fan. This avoids the formation of a large separation vortex near the rear volute tongue due to the need for a large deflection of the airflow direction, thereby reducing the cavity noise caused by the separation vortex at the rear volute tongue and improving the user's listening comfort. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the structure of the indoor unit of the wall-mounted air conditioner disclosed in the embodiments of this application;

[0032] Figure 2 This is a front view of the indoor unit of the wall-mounted air conditioner disclosed in the embodiments of this application;

[0033] Figure 3 for Figure 2 Sectional view of AA;

[0034] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100 - Indoor unit;

[0037] 1-Housing; 1a-Housing air inlet; 1b-Housing air outlet; 1c-Housing housing cavity; 11-Rear panel;

[0038] 2-Heat exchanger;

[0039] 3-Cross-flow fan;

[0040] 4-Electric heater; 41-Fin; 41a-First edge; 41b-Second edge;

[0041] 5-Air duct assembly; 51-Volume housing; 511-Air inlet end; 52-Rear volute tongue; 521-Main body section; 522-Bent section. Detailed Implementation

[0042] 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.

[0043] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] With the improvement of living standards and the change of aesthetic concepts, people are no longer satisfied with just the basic performance of air conditioners, but pay more attention to the coordination and unity of their appearance with the interior decoration style, cost performance, and the aesthetics of their installation with the indoor environment.

[0048] Wall-mounted air conditioners, a common type of air conditioner, are typically installed by hanging the indoor unit on the wall. This installation method not only effectively utilizes wall space and avoids the problem of air conditioners occupying valuable floor space, but also maintains the overall harmony of the interior design to a certain extent. Furthermore, wall-mounted air conditioners are suitable for various apartment layouts and decorating styles. Whether it's a small or large apartment, a modern minimalist style or a classic Chinese style, wall-mounted air conditioners can complement the interior design with their diverse appearances. In addition, wall-mounted air conditioners offer multiple control methods to meet the different temperature and airflow needs of various users. Therefore, due to their convenient installation, wide applicability, and moderate price, wall-mounted air conditioners have become a common choice for many homes and offices.

[0049] In related technologies, the rear volute of a wall-mounted air conditioner is connected to the end of the volute casing near the air inlet. The rear volute is a straight structure. When airflow enters the indoor unit from the air inlet, it undergoes heat exchange through the heat exchanger. The heat-exchanged airflow then enters the duct between the rear volute and the cross-flow fan, where the fan blows it out. However, the heat-exchanged airflow needs to deflect at a significant angle, preventing it from flowing close to the surface of the rear volute. This results in a large separation vortex near the rear volute, creating significant cavity noise and affecting the user's listening comfort.

[0050] Based on this, this application provides a wall-mounted air conditioner that can avoid the generation of a large area of ​​separation vortex near the rear volute tongue due to the need for a large deflection of the airflow direction, thereby reducing the cavity sound generated by the separation vortex at the rear volute tongue and improving the user's listening comfort.

[0051] The present technical solution will be further described below with reference to the embodiments and accompanying drawings.

[0052] Please see Figure 1This application provides a wall-mounted air conditioner, which includes an indoor unit 100. The indoor unit 100 is an important component of the wall-mounted air conditioner and performs an air conditioning cycle using an air supply system and a related heat exchange system. This cycle encompasses a series of processes, including air intake, heat exchange, airflow propulsion, and temperature regulation, thereby providing a suitable temperature and air quality for the indoor space. A strong airflow is generated by the air supply system to draw indoor air into the ducted air conditioner. The intake air then flows through the heat exchange system to absorb heat from the air, achieving a cooling effect, and transfers the heat to the refrigerant through the heat exchange process. The cooled air, after heat exchange, is pushed back into the indoor space by the air supply system, forming a cycle. Through this cycle, the indoor space temperature is regulated, and the indoor air quality is improved through airflow circulation, providing users with a comfortable and healthy indoor environment. In this embodiment, the indoor unit 100 is mounted on the indoor wall.

[0053] like Figure 2 and Figure 3 As shown, the indoor unit 100 includes a housing 1, which is provided with a housing air inlet 1a and a housing air outlet 1b, and a housing receiving cavity 1c is formed inside the housing 1. The housing air inlet 1a is used to guide airflow into the interior of the housing 1, and the housing air outlet 1b is used to guide airflow into the room.

[0054] The housing 1 includes a rear panel 11 for connecting the indoor unit 100 to the indoor wall.

[0055] The indoor unit 100 also includes a heat exchanger 2, which is disposed within the housing cavity 1c and is used to exchange heat with the airflow passing through the air inlet 1a of the housing. The heat exchanger 2 is a heat exchanger that utilizes the characteristic that liquid low-temperature refrigerant easily evaporates under low pressure. By absorbing heat from the medium being cooled, it lowers the temperature of the surrounding air, thereby achieving a cooling effect. The cooled air after passing through the heat exchanger 2 is then returned to the room through the air supply system, providing a comfortable indoor environment. Especially in the hot summer, the cooling effect of the heat exchanger 2 can significantly reduce the indoor temperature and improve people's living comfort.

[0056] The indoor unit 100 also includes a cross-flow fan 3, which is disposed within the housing cavity 1c and located on the side of the heat exchanger 2 away from the housing air inlet 1a. The cross-flow fan 3 is used to introduce airflow into the housing 1 from the housing air inlet 1a, and after heat exchange in the heat exchanger 2, the airflow is output to the outside from the housing air outlet 1b. The cross-flow fan 3 can introduce airflow into the interior of the housing 1, so that after heat exchange in the heat exchanger 2, the airflow is returned to the room under the action of the cross-flow fan 3.

[0057] The indoor unit 100 also includes an electric heater 4, which is disposed within the housing cavity 1c and located between the heat exchanger 2 and the cross-flow fan 3. The heat exchanger 2 partially surrounds the electric heater 4. The electric heater 4 is used to assist in heating when the indoor unit 100 is in heating mode, ensuring the heating capacity of the indoor unit 100 to reach the user's required temperature and improve user comfort.

[0058] The indoor unit 100 also includes an air duct assembly 5, which is disposed in the housing cavity 1c. An air duct is formed in the air duct assembly 5, and a cross-flow fan 3 is disposed in the air duct. After heat exchange, the airflow flows in the air duct under the action of the cross-flow fan 3, and then flows into the room through the housing air outlet 1b.

[0059] like Figure 3 As shown, the air duct assembly 5 includes a volute 51, which is disposed around the side of the cross-flow fan 3 facing the rear panel 11. The volute 51 is an important component of the air duct assembly 5. The volute 51 is used to guide airflow. By designing a specific volute shape, the airflow can rotate along the curved shape of the volute 51 as it flows through the air duct, gradually accelerating. Furthermore, the kinetic energy of the airflow increases as it flows through the volute 51 due to its shape.

[0060] like Figure 3 As shown, the air duct assembly 5 also includes a rear volute tongue 52, which is disposed at the air inlet end 511 of the volute housing 51. The air inlet end 511 of the volute housing 51 is the end of the volute housing 51 near the air inlet 1a of the housing.

[0061] See Figure 4 The rear volute tongue 52 includes a main body section 521, which is connected to the air inlet end 511, and the gap between the main body section 521 and the cross-flow fan 3 is greater than the gap between the air inlet end 511 and the cross-flow fan 3.

[0062] The rear volute tongue 52 also includes a bent section 522, which is connected to the end of the main body section 521 away from the air inlet end 511. The bent section 522 bends away from the cross-flow fan 3 relative to the main body section 521, and the included angle between the main body section 521 and the bent section 522 is an obtuse angle.

[0063] It should be noted that, in combination Figure 3 and Figure 4 From the air inlet end 511 towards the air outlet 1b of the housing, the gap between the volute 51 and the cross-flow fan 3 gradually increases. From the air inlet end 511 towards the air inlet 1a of the housing, the gap between the rear volute tongue 52 and the cross-flow fan 3 gradually increases. That is, the part below the air inlet end 511 is the volute 51, and the part above the air inlet end 511 is the rear volute tongue 52.

[0064] After the airflow passes through the heat exchanger 2 for heat exchange, it needs to enter the air duct under the drive of the cross-flow fan 3. However, the airflow after heat exchange needs to be deflected in a large direction to enter the space between the rear volute tongue 52 and the outer contour of the cross-flow fan 3. The deflected airflow cannot flow along the surface of the rear volute tongue 52, which results in a large separation vortex near the rear volute tongue 52. The separation vortex will generate cavity sound, which will aggravate the noise level of the indoor unit 100 and reduce the user's listening comfort.

[0065] Therefore, this embodiment, by setting a bent section 522 that bends away from the cross-flow fan 3 and setting the angle between the main body section 521 and the bent section 522 to an obtuse angle, allows the airflow to be guided by the bent section 522 during its flow after passing through the heat exchanger 2. Under the guidance of the bent section 522, the airflow direction is guided to the air duct between the main body section 521 of the rear volute tongue 52 and the cross-flow fan 3, so that the airflow can enter the space between the main body section 521 of the rear volute tongue 52 and the cross-flow fan 3 without having to deflect at an excessive angle. This reduces the area of ​​the separation vortex generated near the rear volute tongue 52, thereby reducing the cavity noise generated by the separation vortex, lowering the noise level of the indoor unit 100, and improving the user's auditory comfort.

[0066] In some embodiments, such as Figure 4 As shown, the included angle α between the main body segment 521 and the bending segment 522 is 120 degrees to 160 degrees.

[0067] When the angle α between the main body section 521 and the bend section 522 is less than 120 degrees, the guiding effect of the bend section 522 on the airflow is too small, causing the airflow to still need to deflect at a large angle when flowing between the main body section 521 and the cross-flow fan 3, resulting in a large separation vortex and a more obvious cavity noise. When the angle α between the main body section 521 and the bend section 522 is greater than 160 degrees, the bend section 522 cannot effectively guide the airflow. Instead, some airflow will be blocked by the bend section 522 and cannot enter between the rear volute tongue 52 and the cross-flow fan 3, resulting in a reduction in the air volume of the indoor unit 100.

[0068] Therefore, in this embodiment, the included angle α between the main body section 521 and the bending section 522 is 120 degrees to 160 degrees, so that the airflow can turn smoothly when passing through the bending section 522 of the rear volute tongue 52, reducing the eddy currents and swirling of the airflow, thereby reducing the noise generated by the airflow impact. In addition, it can reduce the resistance of the airflow during the turning process, which helps the airflow to enter the air duct more smoothly and improve the flow efficiency of the airflow.

[0069] In some embodiments, the angle α between the main body section 521 and the bending section 522 is 130 degrees to 150 degrees. Within this angle range, the bending section 522 can more effectively guide the airflow, making the deflection of the airflow under its guidance smoother and more fluid, which is beneficial for the airflow to smoothly enter the duct between the main body section 521 and the cross-flow fan 3. Furthermore, after being guided by the bending section 522, the airflow can be more evenly distributed after entering the space between the main body section 521 and the cross-flow fan 3, avoiding excessive concentration or dispersion of the airflow, thereby improving the air delivery capacity of the indoor unit 100.

[0070] In some embodiments, see Figure 4 Along the direction from the main body section 521 to the volute 51, the distance between the main body section 521 and the outer contour of the cross-flow fan 3 gradually decreases.

[0071] Since the airflow state is related to the distance between the main body section 521 and the outer contour of the cross-flow fan 3, as the distance gradually decreases, the airflow is gradually compressed and concentrated as it approaches the volute 51. This helps to increase the airflow speed and pressure, allowing the airflow to enter the volute 51 more effectively and be drawn into the cross-flow fan 3. This method of concentrating the airflow can reduce the diffusion and turbulence of the airflow in the duct and improve the flow efficiency of the airflow.

[0072] Furthermore, the gradually decreasing spacing can reduce airflow leakage between the main body section 521 and the cross-flow fan 3, ensuring that more airflow is effectively guided into the volute 51, which helps to improve the air supply performance of the indoor unit 100.

[0073] In some embodiments, see Figure 4 Along the direction from the main body section 521 to the volute 51, the minimum distance M between the main body section 521 and the outer contour of the cross-flow fan 3 is 3mm to 8mm.

[0074] When the minimum distance M between the main body section 521 and the outer contour of the cross-flow fan 3 is less than 3mm, the airflow will encounter greater airflow resistance when passing through the area with the smallest distance between the main body section 521 and the outer contour of the cross-flow fan 3, resulting in greater pressure loss. This will reduce the airflow efficiency and affect the air volume of the indoor unit 100. When the minimum distance M between the main body section 521 and the outer contour of the cross-flow fan 3 is greater than 8mm, the airflow will be too dispersed when flowing between the main body section 521 and the cross-flow fan 3, reducing the airflow speed and pressure, reducing the efficiency of airflow entering the volute 51, and reducing the air supply performance of the indoor unit 100.

[0075] Therefore, in this embodiment, the minimum distance M between the main body section 521 and the outer contour of the cross-flow fan 3 is set to 3mm to 8mm. This ensures that the airflow is gradually compressed and concentrated as it approaches the volute 51, increasing the airflow speed and pressure. This allows the airflow to enter the volute 51 more effectively and be drawn into the cross-flow fan 3. The airflow maintains a stable flow path when passing through the main body section, avoiding airflow separation or vortex phenomena. Furthermore, the 3mm to 8mm distance ensures smooth airflow while preventing airflow diffusion caused by excessive gaps.

[0076] For example, the minimum distance M between the main body segment 521 and the outer contour of the cross-flow fan 3 can be 3mm, 4mm, 5mm, 6mm, 7mm or 8mm.

[0077] In some embodiments, such as Figure 4 As shown, the length L2 of the main body section 521 extending away from the air inlet end 511 is 10mm to 25mm.

[0078] When the length L2 of the main body section 521 extending away from the air inlet 511 is less than 10mm, the airflow cannot effectively transition into the duct, which easily causes airflow separation and turbulence, reducing the air supply effect of the indoor unit 100. When the length L2 of the main body section 521 extending away from the air inlet 511 is greater than 25mm, the airflow path becomes longer, increasing airflow resistance. Furthermore, the excessive length of the main body section 521 will block some airflow, preventing some airflow from entering between the main body section 521 and the cross-flow fan 3, thereby reducing the air supply effect of the indoor unit 100.

[0079] Therefore, in this embodiment, the length L2 of the main body section 521 extending away from the air inlet end 511 is 10mm to 25mm, which can effectively guide the airflow to smoothly transition into the air duct, reduce airflow separation and turbulence, and ensure smooth airflow.

[0080] It should be noted that the length of the posterior cochlear tongue 52 in this embodiment is fixed, that is, the length of the posterior cochlear tongue 52 is 20mm to 50mm.

[0081] In some embodiments, such as Figure 4 As shown, the length L1 of the bent segment 522 of the posterior cochlear tongue 52 extending away from the main body segment 521 is 10mm to 25mm.

[0082] When the length L1 of the bend section 522 extending away from the main body section 521 is less than 10mm, the airflow cannot be effectively guided when entering the duct, thereby increasing the turbulence and resistance of the airflow and reducing the airflow delivery efficiency. When the length L1 of the bend section 522 extending away from the main body section 521 is greater than 25mm, the length of the main body section 521 will be too short, which will cause the airflow to be unable to be effectively concentrated in the duct and reduce the air supply effect of the indoor unit 100.

[0083] Therefore, in this embodiment, the length L1 of the bending section 522 extending away from the main body section 521 is set to be 10mm to 25mm. This ensures that the bending section 522 can effectively guide the airflow, while also ensuring that the main body section 521 has sufficient length so that the airflow can flow effectively along the main body section 521 and concentrate in the air duct between the main body section 521 and the cross-flow fan 3, thus ensuring the air supply effect of the indoor unit 100.

[0084] In some embodiments, the posterior volute tongue 52 is integrally formed with the volute shell 51.

[0085] On the one hand, the integrated rear volute tongue 52 and volute housing 51 can optimize airflow guidance, making the airflow distribution within the volute housing 51 more uniform. When the volute housing 51 and the rear volute tongue 52 are integrated as a whole, the airflow path within the volute housing 51 is smoother, better guiding the airflow and reducing airflow eddies and turbulence, thereby reducing airflow resistance and improving the air delivery performance of the indoor unit 100.

[0086] On the other hand, the one-piece molded rear volute 52 and volute housing 51 can enhance the structural strength of the volute housing 51 and the rear volute 52. This makes the connection between the rear volute 52 and the volute housing 51 more robust, and can better withstand various stresses during the operation of the indoor unit 100, such as airflow impact and vibration, thereby improving the reliability and service life of the indoor unit 100.

[0087] In some embodiments, see Figure 3 Along the thickness direction of the housing 1, the electric heater 4 is located on the side of the bend 522 of the rear volute tongue 52 away from the rear back plate 11.

[0088] It should be noted that, along the thickness direction of the housing 1, the side closer to the rear back plate 11 is the rear side, and the side inside the housing 1 away from the rear back plate 11 along the thickness direction is the front side. That is, the electric heater 4 is located in front of the bend section 522 of the rear volute tongue 52.

[0089] In this way, after the airflow passes through the electric heater 4, it can be guided by the electric heater 4 to direct the airflow direction to the front of the bend section 522, preventing some airflow from entering between the bend section 522 of the rear volute 52 and the rear back panel 11, ensuring that the airflow can enter between the rear volute 52 and the outer contour of the cross-flow fan 3, thereby ensuring the air volume of the indoor unit 100.

[0090] In some embodiments, see Figure 3 The electric heater 4 includes multiple fins 41, which are spaced apart along the axial direction of the cross-flow fan 3. The electric heater 4 heats the airflow passing through it and the airflow around it through the fins 41.

[0091] The fin 41 is rectangular and includes a first edge 41a and a second edge 41b that are parallel to each other. The first edge 41a is disposed toward the front side of the housing 1, and the second edge 41b is disposed toward the rear side of the housing 1. The upper end of the second edge 41b is higher than the upper end of the first edge 41a.

[0092] It should be noted that the front side of the housing 1 refers to the side of the housing 1 that is away from the back panel 11, and the rear side of the housing 1 refers to the side of the housing 1 that is close to the back panel 11.

[0093] In this way, when the airflow passes through the electric heater 4, it can be guided by the fins 41. When the airflow flows out of the electric heater 4, the airflow direction is already roughly towards the air duct between the main body section 521 of the rear volute tongue 52 and the outer contour of the cross-flow fan 3. This allows the airflow to enter the space between the main body section 521 and the outer contour of the cross-flow fan 3 without having to deflect the flow direction too much. This reduces the resistance of the airflow during the flow process, making the airflow enter the air duct more smoothly, thereby improving the air supply performance of the indoor unit 100.

[0094] Preferably, the second edge 41b of the fin 41 in the electric heater 4 is parallel to the main body section 521 of the rear volute 52. After the airflow exits from the electric heater 4, the airflow direction is directly towards the area between the main body section 521 of the rear volute 52 and the outer contour of the cross-flow fan 3, so that the airflow can directly flow into the area between the main body section 521 and the outer contour of the cross-flow fan 3, further reducing the resistance of the airflow when entering the area between the main body section 521 of the rear volute 52 and the outer contour of the cross-flow fan 3, and improving the air supply performance of the indoor unit 100.

[0095] 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 characterized by comprising: The application relates to an air conditioner, which comprises: an indoor unit, which comprises: a casing provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity formed in the casing, the casing comprising a back plate for connecting with a wall in a room; a heat exchanger arranged in the casing accommodating cavity, the heat exchanger being used for heat exchange of air flow passing through the casing air inlet; a cross-flow fan arranged in the casing accommodating cavity and located at a side of the heat exchanger away from the casing air inlet, the cross-flow fan being used for leading air flow into the casing from the casing air inlet and conveying the air flow to the room through the casing air outlet after heat exchange by the heat exchanger; an electric heater arranged in the casing accommodating cavity and located between the heat exchanger and the cross-flow fan; a duct assembly arranged in the casing accommodating cavity, the duct assembly comprising a duct formed therein, and the cross-flow fan being arranged in the duct, the duct assembly comprising: a volute arranged at a side of the cross-flow fan away from the back plate; a back volute tongue arranged at an air inlet end of the volute, the air inlet end being an end of the volute close to the casing air inlet, the back volute tongue comprising: a main body section connected with the air inlet end, and a gap between the main body section and the cross-flow fan being larger than a gap between the air inlet end and the cross-flow fan; a bending section connected with an end of the main body section away from the air inlet end, the bending section being bent away from a side of the main body section away from the cross-flow fan, and an included angle between the main body section and the bending section being obtuse.

2. The wall-mounted air conditioner according to claim 1, wherein The included angle between the main body section and the bending section is 120-160 degrees.

3. The wall surface-mounted type air conditioner according to claim 1, wherein The included angle between the main body section and the bending section is 130-150 degrees.

4. The wall surface-mounted type air conditioner according to claim 1, wherein In a direction of the main body section pointing to the volute, a distance between the main body section and an outer contour of the cross-flow fan gradually decreases.

5. The wall-mounted air conditioner according to claim 4, wherein In the direction of the main body section pointing to the volute, a minimum distance between the main body section and the outer contour of the cross-flow fan is 3-8 mm.

6. The wall surface-mounted type air conditioner according to claim 1, wherein An extension length of the main body section away from the air inlet end is 10-25 mm.

7. The wall-mounted air conditioner according to claim 6, wherein An extension length of the bending section away from the main body section is 10-25 mm.

8. The wall-mounted air conditioner according to any one of claims 1 through 7, characterized by, The back volute tongue is integrally formed with the volute.

9. The wall surface-mounted type air conditioner according to claim 1, wherein In a thickness direction of the casing, the electric heater is located at a side of the bending section away from the back plate.

10. The wall-mounted air conditioner according to claim 9, wherein, The electric heater comprises a plurality of fins arranged in an axial direction of the cross-flow fan, the fins being rectangular, the fins comprising mutually parallel first edges and second edges, the first edges being arranged towards a front side of the casing, the second edges being arranged towards a back side of the casing, and an upper end of the second edges being higher than an upper end of the first edges.

Images