Vertical air conditioner indoor unit

Abstract

The application provides a vertical air conditioner indoor unit, which comprises a shell and an indoor fan, the shell comprises a front volute tongue and a rear volute tongue, and a volute tongue air duct is formed between the front volute tongue and the rear volute tongue; the indoor fan is arranged at least partially in the volute tongue air duct; the closest point between the front volute tongue and the outer ring of the indoor fan is a first point, the closest point between the rear volute tongue and the outer ring of the indoor fan is a second point, and the distance between the first point and the second point is an air inlet width, wherein D is the diameter of the indoor fan. Then, in the case of keeping the size of the whole machine unchanged, the closest point between the front volute tongue and the outer ring of the indoor fan and the closest point between the rear volute tongue and the outer ring of the indoor fan are arranged between the first point and the second point, so that the volute tongue is prevented from being too close to the outer ring of the indoor fan, high turbulence is avoided when the airflow passes through the narrow channel, sharp noise is avoided, backflow vortex is avoided, the air volume utilization rate is improved, and the energy consumption is lower.

Description

Technical Field

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

[0002] A vertical air conditioner indoor unit may include an indoor air inlet, an indoor air outlet, an indoor heat exchanger, and an indoor fan. The indoor fan drives airflow from the indoor air inlet into the air conditioner indoor unit to exchange heat with the indoor heat exchanger. After heat exchange, the airflow flows out of the air conditioner indoor unit through the indoor air outlet to cool or heat the environment.

[0003] As people's demands for living environment comfort continue to rise, higher requirements are being placed on the air volume of floor-standing air conditioner indoor units. Currently, to obtain greater air volume, some household indoor air conditioners on the market mainly increase the air volume by increasing the fan speed. However, increasing the fan speed requires a more powerful motor, which undoubtedly increases the cost of the motor; more importantly, the fan is prone to generating specific aerodynamic noise during high-speed operation. When the noise reaches a certain level, it can seriously affect the user's daily life and rest, resulting in a poor user experience.

[0004] Another approach is to increase airflow by increasing the fan diameter. However, in single-flow floor-standing air conditioners, the upper limit for fan diameter is not yet clearly defined. Furthermore, due to the limited internal space of the unit, the airflow design of conventional cylindrical floor-standing air conditioners maintains a certain proportional relationship between the air intake width and the fan diameter. When pursuing greater airflow and using ultra-large diameter fans (D > 130mm), continuing with the conventional air intake width ratio would make it difficult to rationally arrange the airflow structure within the limited space of the unit. This could also lead to mismatches in structural parameters such as the volute spacing, affecting airflow performance.

[0005] Therefore, while ensuring that the cabinet air conditioner's external dimensions remain unchanged, exploring an air duct layout that can accommodate ultra-large diameter fans to achieve high air volume and avoid the drawbacks of high speed has become an important issue that needs to be addressed by those skilled in the art.

[0006] Therefore, there is an urgent need to develop a vertical air conditioner indoor unit. Utility Model Content

[0007] This utility model aims to at least partially solve one of the technical problems in the related art.

[0008] Therefore, according to embodiments of this disclosure, a vertical air conditioner indoor unit is proposed, comprising: A main body, wherein the height of the main body extends from its top to its bottom; the main body comprises at least: A housing having an indoor air inlet and an indoor air outlet, the housing enclosing a first cavity, the indoor air outlet and the indoor air inlet communicating with the first cavity; the housing includes: Anterior cochlear tongue; The rear volute tongue forms a volute tongue air duct between the front and rear volute tongues; in a cross section perpendicular to the height direction, the extension length of the rear volute tongue from one end near the indoor air outlet to one end near the indoor air inlet is the first extension length, and the extension length of the front volute tongue from one end near the indoor air outlet to one end near the indoor air inlet is the second extension length, wherein the first extension length is greater than the second extension length. An indoor heat exchanger is disposed within the first cavity; An indoor fan, at least partially disposed within the volute air inlet duct; The indoor fan rotates to allow airflow to enter the first cavity through the indoor air inlet and exchange heat with the indoor heat exchanger. After exchanging heat with the indoor heat exchanger, the airflow flows through the volute duct to the indoor air outlet and then flows from the indoor air outlet to the user's room. In a cross-section perpendicular to the height direction, the point where the front volute is closest to the outer ring of the indoor fan is the first point, and the point where the rear volute is closest to the outer ring of the indoor fan is the second point. The distance between the first point and the second point is the air intake width. , Where D is the diameter of the indoor fan.

[0009] In this application, the indoor heat exchanger is placed in the first chamber. After the airflow enters the first chamber, it must pass through the indoor heat exchanger before reaching the indoor fan, ensuring that all driven airflows contact the indoor heat exchanger and maximizing the utilization of the heat exchange area. Then, through the volute air duct formed by the cooperation of the front and rear volutes, the indoor fan is at least partially located within the volute air inlet duct. This allows the rotational airflow generated by the indoor fan to be converted into a straight airflow within the volute air duct, avoiding high-frequency turbulent noise caused by turbulent eddies. Then, while maintaining the overall size of the unit, the distance between the nearest point of the front volute and the nearest point of the rear volute from the outer ring of the indoor fan is set... The distance between the volute and the outer ring of the indoor fan should be carefully considered to avoid excessive turbulence, which would cause a sudden increase in air resistance due to the narrow passage, and the high-speed airflow impacting the volute, resulting in sharp noise. Conversely, excessive distance between the volute and the outer ring of the indoor fan should also be avoided to prevent partial backflow of exhaust air, forming vortices and reducing effective airflow, thus wasting space. The air intake width should be adjusted accordingly. Setting it within the range of 1.05D-1.10D ensures sufficient air intake width, reduces wind resistance, avoids backflow eddies, improves air volume utilization, reduces turbulence noise, and ultimately improves the air conditioner's energy efficiency ratio, resulting in faster operation and lower energy consumption.

[0010] According to embodiments of this disclosure, the vertical air conditioner indoor unit further includes: The air duct extension includes: A first extension plate and a second extension plate, wherein the first cavity is provided with an air outlet duct located between the first extension plate and the second extension plate; Along the airflow direction within the volute duct, the first end of the first extension plate is connected to the air outlet of the front volute, the second end of the first extension plate is located near the indoor air outlet, the first end of the second extension plate is connected to the air outlet of the rear volute, and the second end of the second extension plate is located near the indoor air outlet. In a cross-section perpendicular to the height direction, the connection point between the first extension plate and the front volute is the third point, and the connection point between the second extension plate and the rear volute is the fourth point. The distance between the third point and the fourth point is the width of the air duct. , Where D is the diameter of the indoor fan.

[0011] In this application, the width of the air duct is... The ratio can find a balance between wind pressure and air volume, which can maintain sufficient wind pressure to ensure air delivery distance, while avoiding air volume loss caused by excessive wind resistance, maximizing the effective air volume delivered per unit time, and also avoiding occupying too much installation space while ensuring the function of the air outlet duct.

[0012] According to an embodiment of this disclosure, in a cross section perpendicular to the height direction, the straight line containing the third point and the fourth point is defined as a first straight line, and the straight line containing the second endpoint of the first extension plate and the second endpoint of the second extension plate is defined as a second straight line; The distance between the first straight line and the second straight line is the duct extension length L. Where D is the diameter of the indoor fan.

[0013] In this application, the duct extension length L is set as... In between, without changing the thickness of the body, the airflow can maintain wind pressure through sufficient constraint length, ensuring that the airflow is fully stable before being delivered, thus improving the uniformity of air delivery. It can also ensure that the air delivery distance covers most of the indoor area without sacrificing air volume and energy consumption due to excessive wind resistance caused by excessive length. At the same time, it can avoid common resonant frequency ranges, reduce structural noise, and significantly reduce turbulent noise.

[0014] According to an embodiment of this disclosure, the distance between the first extension plate and the second extension plate gradually increases from the end near the indoor fan towards the indoor air outlet. The first extension plate includes a straight segment and a curved segment. The straight segment is located at one end near the front volute, and the curved segment is located at one end near the indoor air outlet.

[0015] In this application, the gradually expanding air outlet duct allows for a smoother diffusion of airflow during its flow, avoiding turbulence and eddies caused by sudden expansion or contraction of the channel. Simultaneously, the rigid constraint of the straight section on the airflow quickly stabilizes it, reducing the degree of turbulence at the beginning of the airflow through the outlet duct and minimizing the generation of high-frequency turbulent noise. The curved section reduces friction and impact between the airflow and the duct wall, preventing eddy noise caused by airflow detaching from the wall.

[0016] According to an embodiment of this disclosure, the indoor air inlet to the indoor air outlet of the main body is the thickness direction of the main body, and the main body also includes a width direction that is perpendicular to the height direction and the thickness direction respectively; In a cross section perpendicular to the height direction, the point where the straight segment and the curved segment connect is point F; A plurality of air guide plates are provided in one end of the air outlet duct near the indoor air outlet. The air guide plates are rotatably arranged in the air outlet duct around their own axis. The plurality of air guide plates are spaced apart along the width direction of the main body. The first air guide plate near the first extension plate is the first air guide plate. When the first air guide plate rotates, point F is located on the maximum contour line formed by the rotation of the endpoint of the first air guide plate.

[0017] In this application, by limiting the maximum contour of the endpoint of the first air guide plate to coincide with point F when it rotates, its rotation limit range can be precisely controlled, avoiding interference or collision with the first extension plate, etc. due to excessive rotation, ensuring the smooth movement of the air guide plate and the stability of the structure, and extending the service life of the component.

[0018] According to an embodiment of this disclosure, the indoor air inlet to the indoor air outlet of the main body is the thickness direction of the main body, and the main body also includes a width direction that is perpendicular to the height direction and the thickness direction respectively; Along the width direction of the main body, the maximum width of the main body is ; Along the thickness direction of the main body, the maximum thickness of the main body is B; The diameter of the indoor fan is D, when .

[0019] In this application, when The size of the indoor fan can be more rationally matched with components such as the volute duct, air outlet, and heat exchanger. Increasing the diameter of the indoor fan results in a larger cross-sectional area of ​​the airflow it sweeps during rotation, driving more airflow at the same speed. This directly increases the air exchange volume between the indoor air inlet and outlet, enhancing the equipment's ventilation or heat exchange capacity. Under the same air volume, a large-diameter fan can operate at a lower speed, thus reducing energy consumption per unit air volume while ensuring air volume, improving the equipment's energy efficiency and meeting energy-saving design requirements.

[0020] According to an embodiment of this disclosure, the indoor air inlet to the indoor air outlet of the main body is the thickness direction of the main body, and the main body also includes a width direction that is perpendicular to the height direction and the thickness direction respectively; Along the width direction of the main body, the maximum width of the main body is ; Along the thickness direction of the main body, the maximum height of the main body is B; The diameter of the indoor fan is D, when .

[0021] In this application, when The size of the indoor fan can be more rationally matched with components such as the volute duct, air outlet, and heat exchanger. Increasing the diameter of the indoor fan results in a larger cross-sectional area of ​​the airflow it sweeps during rotation, driving more airflow at the same speed. This directly increases the air exchange volume between the indoor air inlet and outlet, enhancing the equipment's ventilation or heat exchange capacity. Under the same air volume, a large-diameter fan can operate at a lower speed, thus reducing energy consumption per unit air volume while ensuring air volume, improving the equipment's energy efficiency and meeting energy-saving design requirements.

[0022] According to an embodiment of this disclosure, the distance from the indoor air inlet to the indoor air outlet of the main body is along the thickness direction of the main body, and the maximum width of the main body is along its width direction. ; The main body also includes a width direction that is perpendicular to both the height and thickness directions. Along the thickness direction of the main body, the maximum thickness of the main body is B. The vertical air conditioner indoor unit also includes an air inlet grille, which is disposed at the indoor air inlet. The minimum distance between the indoor heat exchanger and the shell is a first distance. The minimum distance between the indoor heat exchanger and the air inlet grille is the second distance. ; .

[0023] In this application, sufficient airflow space is ensured around the indoor heat exchanger. After airflow enters through the indoor air inlet and air inlet grille, it needs to pass through a certain space to reach the indoor heat exchanger. If H1 or H2 is too small, the airflow will encounter significant flow resistance due to the narrow space before reaching the heat exchanger, resulting in reduced airflow around the heat exchanger and thus affecting the heat exchange effect. Sufficient distance allows the airflow to flow more smoothly to the heat exchanger, ensuring full contact between the heat exchanger surface and the airflow, improving heat exchange efficiency, and guaranteeing the cooling or heating performance of the air conditioner.

[0024] According to an embodiment of this disclosure, the vertical air conditioner indoor unit further includes an electric auxiliary heater, which is disposed in the first cavity and located between the indoor heat exchanger and the indoor fan; The minimum distance between the electric auxiliary heating element and the indoor heat exchanger is the third distance. , .

[0025] In this application, the third distance This design ensures that the airflow has enough space to fully contact the electric auxiliary heating after passing through the heat exchanger, effectively preventing reverse heat transfer and ensuring the normal operation of the indoor heat exchanger. It also allows the heated airflow to be quickly drawn into the fan, reducing heat loss in the cavity.

[0026] According to an embodiment of this disclosure, the vertical air conditioner indoor unit further includes an electric auxiliary heater, which is disposed in the first cavity and located between the indoor heat exchanger and the indoor fan; The minimum distance between the electric auxiliary heating element and the outer ring of the indoor fan is the fourth distance. , Where D is the diameter of the indoor fan.

[0027] In this application, the fourth distance is set as This design provides ample buffer space for airflow from the electric auxiliary heater to the indoor fan, ensuring that the air heated by the electric auxiliary heater is smoothly drawn into the indoor fan. This reduces wind resistance loss and ensures that the airflow of the indoor fan is not affected. Simultaneously, sufficient distance allows the airflow to form a stable flow field before entering the indoor fan, preventing additional aerodynamic noise caused by airflow turbulence and maintaining the air conditioning's efficiency and quiet operation.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a vertical air conditioner indoor unit according to an embodiment of this application; Figure 2 This is a structural schematic diagram of a vertical air conditioner indoor unit according to an embodiment of this application from another perspective; Figure 3 This is a cross-sectional view of a vertical air conditioner indoor unit according to an embodiment of this application; Figure 4 yes Figure 3 A magnified structural diagram of A in the middle; Figure 5 This is another cross-sectional view of a vertical air conditioner indoor unit according to an embodiment of this application; Figure 6 yes Figure 5 A magnified structural diagram of B in the diagram; Figure 7 yes Figure 5 A magnified structural diagram of C; Figure 8 yes Figure 5 A magnified structural diagram of D in the diagram.

[0030] The annotations in the attached figures are explained as follows: Main body 100; First cavity 101; Housing 1; Indoor air inlet 111; Indoor air outlet 112; Front volute 113; Rear volute 114; Volute air duct 115; Indoor heat exchanger 21; Indoor fan 31; Air duct extension 41; First extension plate 411; Straight section 4111; Curved section 4112; Second extension plate 412; Air outlet duct 413; Air guide plate 51; First air guide plate 511; Rotating shaft 512; Air inlet grille 61; Electric auxiliary heating 71. Detailed Implementation

[0031] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] This application discloses a vertical air conditioner indoor unit, as shown in the attached figure below. Figures 1-8 Describe the indoor unit of the floor-standing air conditioner.

[0036] In this application, the indoor unit of a vertical air conditioner can be a component of an air conditioner. The air conditioner may include an outdoor unit.

[0037] In this application, the indoor unit of the vertical air conditioner can be installed upright on a supporting object such as the floor.

[0038] Reference Figure 1 and Figure 2 This application proposes a vertical air conditioner indoor unit. The vertical air conditioner indoor unit includes a main body 100. The main body 100 is configured as the outer shell of the vertical air conditioner indoor unit. The main body 100 may have a cylindrical hollow structure. It should be noted that in other embodiments, the main body 100 may also adopt other shell structures. The specific shape of the main body 100 can be adjusted as needed and is not limited here.

[0039] In this application, the main body 100 may have a top and a bottom. The distance from the bottom to the top of the main body 100 can be the height direction of the main body 100. The main body 100 may have a width direction. The distance from the first side end to the second side end of the main body 100 can be the width direction of the main body 100. The main body 100 may have a front side and a rear side that are opposite to each other. The side of the main body 100 facing the user can be the front side of the main body 100. The distance from the front side to the rear side of the main body 100 can be the front-back direction of the main body 100. The height direction, width direction, and front-back direction of the main body 100 may be perpendicular to each other.

[0040] In this application, the indoor unit of the air conditioner can be installed vertically. The height direction of the indoor unit can be parallel to the vertical direction.

[0041] In this application, references Figure 3 and Figure 5 The main body 100 may include a housing 1, which encloses the interior to form a first cavity 101.

[0042] refer to Figure 2 , Figure 3 and Figure 5 An indoor air inlet 111 can be formed on the housing 1. The indoor air inlet 111 can be the entrance for airflow into the housing 1. The indoor air inlet 111 can communicate with the first cavity 101. In this application, the indoor air inlet 111 can be located on the rear side of the housing 1.

[0043] refer to Figure 1 , Figure 3 and Figure 5 An indoor air outlet 112 can be formed on the housing 1. The indoor air outlet 112 serves as an outlet for airflow to exit the housing 1. The indoor air outlet 112 can communicate with the first cavity 101. In one embodiment, the indoor air outlet 112 can be located on the front side of the main body 100; in other embodiments, the indoor air outlet 112 can be located on the side of the main body 100. The specific position of the indoor air outlet 112 can be adjusted as needed and is not limited herein.

[0044] In this application, reference is made to Figure 3 and Figure 5 The housing 1 includes a front volute 113 and a rear volute 114. Both the front volute 113 and the rear volute 114 can be disposed in the first cavity 101, forming a volute air duct 115 between the front volute 113 and the rear volute 114.

[0045] In this application, reference is made to 3 and Figure 5In a cross section perpendicular to the height direction, the extension length of the rear volute 114 from one end near the indoor air outlet 112 to one end near the indoor air inlet 111 is the first extension length, and the extension length of the front volute 113 from one end near the indoor air outlet 112 to one end near the indoor air inlet 111 is the second extension length. The first extension length is greater than the second extension length.

[0046] In this application, the volute duct 115 formed by the cooperation of the front volute 113 and the rear volute 114 converts the rotating airflow generated by the indoor fan 31 into a straight airflow within the volute duct 115, thus avoiding high-frequency turbulent noise caused by turbulent airflow forming eddies.

[0047] In this application, reference is made to Figure 3 and Figure 5 The main body 100 may include an indoor heat exchanger 21, which may be disposed within the first cavity 101. The indoor heat exchanger 21 can be used to exchange heat with the airflow within the first cavity 101.

[0048] The indoor heat exchanger 21 is placed in the first chamber 101. After the airflow enters the first chamber 101, it must flow through the indoor heat exchanger 21 before reaching the indoor fan 31, ensuring that all driven airflows come into contact with the indoor heat exchanger 21 and maximizing the utilization rate of the heat exchange area.

[0049] In this application, reference is made to Figure 3 and Figure 5 The main body 100 may include an indoor fan 31, which may be at least partially located within the volute air inlet duct. The indoor fan 31 may be a cross-flow fan. The indoor fan 31 can rotate to drive airflow from the indoor air inlet 111 into the first chamber 101 to exchange heat with the indoor heat exchanger 21. The airflow after heat exchange with the indoor heat exchanger 21 can flow through the volute air duct 115 to the indoor air outlet 112 and then into the user's room from the indoor air outlet 112.

[0050] In this application, reference is made to Figure 3 and Figure 5 In a cross section perpendicular to the height direction, along the clockwise rotation direction of the indoor fan 31, the front volute 113 is located on the left side of the indoor fan 31, and the rear volute 114 is located on the right side of the indoor fan 31.

[0051] In this application, the outdoor unit of the air conditioner may include an outdoor unit housing 1. The outdoor unit housing 1 may have an outdoor receiving space.

[0052] In this application, the outdoor unit of the air conditioner may include an outdoor heat exchanger. The outdoor heat exchanger may be located within an outdoor enclosure.

[0053] In this application, the outdoor unit of an air conditioner may include an outdoor fan. The outdoor fan may be located within an outdoor enclosure.

[0054] In this application, the outdoor unit housing 1 may be provided with an outdoor air inlet. The outdoor air inlet may communicate with an outdoor enclosure space. The outdoor air inlet may be used to introduce outdoor airflow into the outdoor enclosure space.

[0055] In this application, the outdoor unit housing 1 may be provided with an outdoor air outlet. The outdoor air outlet may communicate with the outdoor enclosure space. The outdoor air outlet may be used to draw airflow from the outdoor enclosure space to the outside of the outdoor enclosure space.

[0056] In this application, the rotation of the outdoor fan causes outdoor airflow to enter the outdoor containment space through the outdoor air inlet and exchange heat with the outdoor heat exchanger. After heat exchange, the outdoor airflow flows out of the outdoor containment space through the outdoor air outlet.

[0057] In this application, the air conditioner may include a compressor. The compressor may be located in an outdoor enclosure.

[0058] In this application, the air conditioner may include a throttling device. The throttling device is used for throttling. The throttling device may be located in the outdoor enclosure space.

[0059] In this application, one of the indoor heat exchanger 21 and the outdoor heat exchanger is a condenser and the other is an evaporator.

[0060] In this application, the air conditioner performs a refrigeration cycle by using a compressor, a condenser, a throttling device, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to a regulated and heat-exchanged airflow.

[0061] In this application, the compressor compresses the refrigerant gas in a low-temperature, low-pressure state and discharges it in a high-temperature, high-pressure state. The discharged refrigerant gas flows into the condenser.

[0062] In this application, the condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0063] In this application, the throttling device causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant.

[0064] In this application, the evaporator evaporates the refrigerant that expands in the throttling device and returns the refrigerant gas, which is in a low-temperature, low-pressure state, to the compressor. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material to be cooled. Throughout the cycle, the air conditioner can regulate the temperature of the indoor space.

[0065] In this application, when the indoor heat exchanger 21 is used as a condenser, the air conditioner is used as a heater in heating mode, and when the indoor heat exchanger 21 is used as an evaporator, the air conditioner is used as a cooler in cooling mode.

[0066] In this application, reference is made to Figure 3 , Figure 5 , Figure 6 and Figure 7 In a cross-section perpendicular to the height direction, the point G closest to the outer ring of the indoor fan 31 on the front volute 113 is the first point, and the point E closest to the outer ring of the indoor fan 31 on the rear volute 114 is the second point. The distance between the first point G and the second point E is the air intake width. , Where D is the diameter of the indoor fan 31.

[0067] Therefore, if the air intake width If the distance is less than 1.05D, the distance between the volute tongue and the outer ring of the indoor fan 31 will be too close, which will lead to problems such as high turbulence and a sudden increase in wind resistance when the airflow passes through the narrow channel. It will also produce sharp noise due to the impact of high-speed airflow on the volute tongue.

[0068] If the air intake width If the distance is greater than 1.10D, it will cause the volute tongue to be too far from the outer ring of the indoor fan 31, resulting in some of the airflow discharged by the fan flowing back and forming vortices, which will reduce the effective air volume and waste space.

[0069] And the air intake width Setting it within the range of 1.05D-1.10D ensures sufficient air intake width, reduces wind resistance, avoids backflow eddies, improves air volume utilization, reduces turbulence noise, and ultimately improves the air conditioner's energy efficiency ratio, resulting in faster operation and lower energy consumption.

[0070] Air intake width of the air duct Strongly correlated with the fan diameter D and the distance between the front and rear volute tongues 114, when using an ultra-large diameter fan, the air volume of this air duct at the same speed is much greater than that of a conventional air duct. Therefore, the operating speed can be appropriately reduced to weaken the high-frequency abnormal noise caused by excessive speed.

[0071] In the prior art, the diameter of the indoor fan 31 can be... Point A is the closest point of the front volute 113 to the outer ring of the indoor fan 31, and point B is the closest point of the rear volute 114 to the outer ring of the indoor fan 31. The distance between points A and B is the air intake width. ,therefore, .

[0072] In this application, reference is made to Figure 3 and Figure 5The indoor unit of the vertical air conditioner may also include a duct extension 41, which may include a first extension plate 411 and a second extension plate 412. The first cavity 101 is provided with an air outlet duct 413 located between the first extension plate 411 and the second extension plate 412.

[0073] In this application, along the airflow direction in the volute duct 115, the first end of the first extension plate 411 is connected to the air outlet end of the front volute 113, the second end of the first extension plate 411 is connected near the indoor air outlet 112, the first end of the second extension plate 412 is connected to the air outlet end of the rear volute 114, and the second end of the second extension plate 412 is located near the indoor air outlet 112.

[0074] If the airflow output from the volute tongue duct 115 is directly exposed within the first cavity 101, it is prone to diffuse in all directions due to loss of restraint, resulting in some airflow failing to reach the outlet efficiently. Therefore, the outlet duct 413 formed by the first extension plate 411 and the second extension plate 412 can continue the restraining effect of the volute tongue duct 115, directionally guide the airflow to the outlet, reduce diffusion loss, and ensure that more airflow can be effectively delivered.

[0075] In this application, reference is made to Figure 3 and Figure 4 The connection point between the first extension plate 411 and the front volute 113 is the third point T, and the connection point between the second extension plate 412 and the rear volute 114 is the fourth point R. The distance between the third point T and the fourth point R is the width of the air duct. , Where D is the diameter of the indoor fan 31.

[0076] Air outlet 413 is used to deliver the airflow generated by the fan into the room. If... Too wide, that is The airflow will diffuse excessively within the air outlet 413, causing a drop in air pressure. This shortens the air delivery distance of the airflow after passing through the indoor air outlet 112, making it difficult to cover distant areas of the room.

[0077] Ruodang Too narrow, that is If the air outlet duct 413 restricts the airflow too much, it will cause a sharp increase in wind resistance. The fan will need to consume more energy to push the airflow through the narrow channel, which may actually reduce the actual airflow due to excessive resistance. And air duct width The ratio can find a balance between wind pressure and air volume, maintaining sufficient wind pressure to ensure air delivery distance while avoiding excessive air resistance that leads to air volume loss. This maximizes the effective air volume delivered per unit time and ensures the functionality of the outlet duct 413 while avoiding excessive installation space occupation. Simultaneously, it is coordinated with the air inlet width... This ensures sufficient and smooth airflow into the fan; and the width of the air duct... This matches the fan's airflow characteristics, reducing intake resistance during the intake phase and reducing exhaust resistance during the exhaust phase, thereby reducing the fan's power consumption and improving the air conditioner's energy efficiency ratio.

[0078] In this invention, within a cross section perpendicular to the height direction, the straight line containing the third and fourth points can be defined as the first straight line, and the straight line containing the second end of the first extension plate 411 and the second end of the second extension plate 412 can be defined as the second straight line.

[0079] In this invention, reference is made to Figure 3 and Figure 5 The distance between the first and second straight lines is the extension length L of the air duct. Where D is the diameter of the indoor fan 31.

[0080] The thickness of the indoor unit of a vertical air conditioner needs to accommodate components such as the indoor heat exchanger 21 and the indoor fan 31. The extension length L of the air duct between the first and second planes directly affects the thickness of the entire unit, that is, the dimension perpendicular to the height direction. If the extension length L of the air duct is too long (L>0.85D), the dimension of the air conditioner body in the thickness direction needs to be increased, thus occupying more indoor space. At the same time, the friction time between the airflow and the inner wall of the extension plate increases, and the wind resistance will rise sharply. Therefore, the indoor fan 31 needs to consume more power to overcome the resistance, which leads to a decrease in actual air pressure. At the same time, the airflow will also be reduced due to excessive resistance. In addition, the pressure fluctuation of the airflow in the outlet duct 413 will resonate with the length of the air duct, generating a low-frequency humming noise.

[0081] If the duct extension length L is too short (L < 0.70D), the air supply performance will be sacrificed. The airflow will be sent out from the indoor air outlet 112 without being fully rectified, which will lead to dispersed air supply direction and uneven air speed, thus affecting the uniformity of indoor temperature distribution.

[0082] The extension length L of the air duct is set at... In between, without changing the thickness of the body, the airflow can maintain wind pressure through sufficient constraint length, ensuring that the airflow is fully stable before being delivered, thus improving the uniformity of air delivery. It can also ensure that the air delivery distance covers most of the indoor area without sacrificing air volume and energy consumption due to excessive wind resistance caused by excessive length. At the same time, it can avoid common resonant frequency ranges, reduce structural noise, and significantly reduce turbulent noise.

[0083] In this invention, reference is made to Figure 3 and Figure 5The distance between the first extension plate 411 and the second extension plate 412 gradually increases from the end of the air outlet 413 near the indoor fan 31 towards the indoor air outlet 112. This means that the air outlet cross-sectional area of ​​the air outlet 413 near the indoor fan 31 gradually increases towards the indoor air outlet 112, making the end of the air outlet 413 near the indoor air outlet 112 flared out like a flared funnel. This gradually expanding air outlet 413 allows the airflow to diffuse more smoothly during flow, avoiding turbulence and eddies caused by sudden expansion or contraction of the channel. Since turbulence increases the frictional resistance between the airflow and the wall of the air outlet 413, the gradually expanding structure guides the airflow to diffuse faster and more orderly, reducing local resistance loss and thus reducing the load on the indoor fan 31 and saving energy. When the airflow enters the air outlet 413 from the volute duct 115, its velocity is relatively high. The gradually expanding structure can gradually convert the kinetic energy of the airflow into static pressure energy through a reasonable diffusion angle, reducing energy loss. At the same time, the gentle diffusion process allows more airflow to pass smoothly through the air outlet 413 and be discharged from the indoor air outlet 112, reducing the stagnation or backflow of airflow in the air outlet 413, indirectly increasing the air supply volume, and reducing the impact and friction between the airflow and the wall of the air outlet 413, thereby reducing aerodynamic noise.

[0084] In this invention, reference is made to Figure 3 , Figure 5 and Figure 8 The first extension plate 411 includes a straight section 4111 and a curved section 4112. The straight section 4111 is located at one end near the volute, and the curved section 4112 is located at one end near the indoor air outlet 112. The straight section 4111 is located at the end near the volute, which is the starting area of ​​the air outlet duct 413. This section adopts a straight plate-like structure, and its extension direction is consistent with the tangential direction of the volute tongue duct 115, forming a continuous airflow guiding path to ensure that the airflow flowing out of the volute tongue duct 115 can first obtain a stable constrained direction. The curved section 4112 connects to the end of the straight section 4111 away from the volute tongue duct 115, located on the side near the indoor air outlet 112. The curved section 4112 starts from the connection point (point F) with the straight section 4111 and expands slightly outward along the width direction of the main body 100. The end of the curved section 4112 connects to the edge of the indoor air outlet 112 to achieve directional diffusion of airflow.

[0085] The straight section 4111, located near the volute duct 115, provides rigid constraint on the airflow exiting the volute duct 115. At this point, the airflow carries strong rotational inertia; the straight structure of the straight section 4111 quickly corrects the airflow direction, confining it to a predetermined path and preventing energy loss due to premature airflow diffusion. The curved section 4112, located near the indoor air outlet 112, follows the airflow diffusion trend as it flows towards the outlet, ensuring more even airflow exits the room. Simultaneously, the rigid constraint of the straight section 4111 quickly stabilizes the airflow, reducing turbulence at the beginning of the outlet duct 413 and minimizing high-frequency turbulence noise. The curved section 4112 reduces friction and impact between the airflow and the wall of the outlet duct 413, preventing vortex noise caused by airflow detaching from the wall.

[0086] In this application, reference is made to Figure 1 , Figure 3 and Figure 5 The main body 100 can have a thickness direction. The distance from the indoor air inlet 111 to the indoor air outlet 112 of the main body 100 is the thickness direction of the main body 100. It can be understood that the main body 100 can have a front and a rear side arranged opposite to each other. The side of the main body 100 facing the user can be considered the front side of the main body 100. The distance from the front side to the rear side of the main body 100 can be considered the front-rear direction of the main body 100. Since the distance from the front side to the rear side of the main body 100 is the thickness direction of the main body 100, the indoor air inlet 111 is located on the rear side of the main body 100, and the indoor air outlet 112 is located on the front side of the main body 100. It should be noted that the thickness direction of the main body 100 is the same as the front-rear direction mentioned above.

[0087] In this application, the thickness direction of the main body 100 and the height direction of the main body 100 can be perpendicular to each other.

[0088] In this embodiment, the main body 100 may further include a width direction that is perpendicular to both the height direction and the thickness direction. The width direction of the main body 100 can be from the first side end to the second side end, with the side closer to the anterior cochlear tongue 113 being the first side end and the side closer to the posterior cochlear tongue 114 being the second side end.

[0089] In this application, the width direction, the height direction, and the thickness direction of the main body 100 can be perpendicular to each other.

[0090] In this application, reference is made to example 3. Figure 5 and Figure 8In a cross-section perpendicular to the height direction, the point where the straight segment 4111 connects to the curved segment 4112 is designated as point F. Several air guide plates 51 are arranged at one end of the air outlet 413 near the indoor air outlet 112. Each air guide plate 51 is rotatably positioned within the air outlet 413 around its own axis. These air guide plates 51 are spaced apart along the width direction of the main body 100. The number of air guide plates 51 is typically 3-5, although in other embodiments, the number can vary. The spacing between adjacent air guide plates 51 can be equal to ensure uniform airflow through the gaps between them. Multiple air guide plates 51 can be rotatably connected via the same rotating shaft 512, which is connected to a drive motor. Users can control the rotation angle of the air guide plates 51 via a remote control or buttons on the unit body to flexibly adjust the airflow direction. The rotating shaft 512 of the air guide plate 51 can be connected to a region near its center to ensure balanced force during rotation.

[0091] In this application, reference is made to example 3. Figure 5 and Figure 8 The first air guide plate 51 closest to the first extension plate 411 is defined as the first air guide plate 511. When the first air guide plate 511 rotates, point F is located on the maximum contour line formed by the rotation of the endpoint of the first air guide plate 511. The first air guide plate 51 closest to the first extension plate 411 is defined as the first air guide plate 511. To avoid the rotation space of the first air guide plate 511, the curved section 4112 of the air outlet duct 413 terminates at point F. When the first air guide plate 511 rotates around its own axis, the movement trajectory of its two endpoints forms two concentric circles, where point F is located on the maximum contour line formed by the rotation of the endpoint closest to point F. It can be understood that when the first air guide plate 511 rotates to point F, the distance between the endpoint of the first air guide plate 511 and point F is zero, forming a tangent state. Therefore, when designing the air guide plate 51, the position of the maximum air damper needs to be considered. When it is at the position of the maximum air damper, the first air guide plate 511 can connect to point F and replace the curved section 4112 as the end of the air outlet duct 413 to meet the requirements of the duct extension length. At other rotation angles, the endpoint maintains a certain gap with point F to avoid physical collision.

[0092] In this application, reference is made to Figure 1 , Figure 3 and Figure 5The main body 100 can have a thickness direction. The distance from the indoor air inlet 111 to the indoor air outlet 112 of the main body 100 is the thickness direction of the main body 100. It can be understood that the main body 100 can have a front and a rear side arranged opposite to each other. The side of the main body 100 facing the user can be considered the front side of the main body 100. The distance from the front side to the rear side of the main body 100 can be considered the front-rear direction of the main body 100. Since the distance from the front side to the rear side of the main body 100 is the thickness direction, the indoor air inlet 111 is located on the rear side of the main body 100, and the indoor air outlet 112 is located on the front side of the main body 100. It should be noted that the thickness and width directions of the main body 100 are the same as the front-rear direction mentioned above.

[0093] In this application, reference is made to Figure 3 and Figure 5 Along the width direction of the main body 100, the maximum width of the main body 100 is Along the thickness direction of the main body 100, the maximum thickness of the main body 100 is B; the diameter of the indoor fan 31 is D, when The diameter D of the indoor fan 31 is the same as the maximum width of the main body 100. There is a strict numerical relationship between the maximum thickness B of the main body 100 and the maximum width. When the thickness is less than the maximum thickness B, the diameter of the indoor fan 31 can be set to... This ensures that the indoor fan 31, despite the limited width of the main body 100, still possesses sufficient size to maintain efficient airflow drive capability. Fan diameter is one of the core parameters determining airflow volume; a larger diameter can drive more airflow at the same rotational speed. When the width of the main body 100... When the fan diameter is small, if the fan diameter D is too small (e.g.) This can lead to insufficient sweeping area of ​​the fan blades, a significant decrease in airflow, and difficulty in meeting indoor temperature regulation needs. The design maximizes the effective working area of ​​the fan within the width limit, ensuring sufficient airflow drawn in from the indoor air inlet 111 and efficiently delivered through the air outlet 413 after heat exchange.

[0094] when The size of the indoor fan 31 allows for a more reasonable spatial arrangement with components such as the volute duct 115, the air outlet duct 413, and the heat exchanger. The indoor fan 31 is located within the first cavity 101, near the indoor air inlet 111. A larger diameter allows it to fit the narrower but thicker casing 1, ensuring a reasonable angle between the rotation axis 512 of the indoor fan 31 and the thickness direction of the main body 100, reducing the risk of interference between the indoor fan 31 and the left and right walls of the casing 1. Simultaneously, the larger fan diameter can accommodate the previously designed air inlet width. duct width These parameters are proportionally coordinated to ensure a smooth airflow path from intake to exhaust, reducing increased wind resistance caused by size mismatch. This ensures that the indoor fan 31 can maintain efficient airflow drive capability even within a limited width space. Meanwhile, under the same air supply volume requirement, a larger diameter indoor fan 31 It can achieve the target air volume at a lower speed, which significantly reduces motor power consumption and improves the air conditioner's energy efficiency ratio compared to the high-speed operation of small-diameter fans. At the same time, the noise generated by the friction between the fan and the airflow and the vibration of the fan blades is less when running at low speed. Combined with the optimized design of the air guide plate 51 inside the air outlet duct 413, the overall operating noise can be further reduced, improving the quietness of the user experience.

[0095] In this application, reference is made to Figure 1 , Figure 3 and Figure 5 The main body 100 can have a thickness direction. The distance from the indoor air inlet 111 to the indoor air outlet 112 of the main body 100 is the thickness direction of the main body 100. It can be understood that the main body 100 can have a front and a rear side arranged opposite to each other. The side of the main body 100 facing the user can be considered the front side of the main body 100. The distance from the front side to the rear side of the main body 100 can be considered the front-rear direction of the main body 100. Since the distance from the front side to the rear side of the main body 100 is the thickness direction of the main body 100, the indoor air inlet 111 is located on the rear side of the main body 100, and the indoor air outlet 112 is located on the front side of the main body 100. It should be noted that the thickness direction of the main body 100 is the same as the front-rear direction mentioned above.

[0096] In this application, reference is made to Figure 3 and Figure 5 Along the width direction of the main body 100, the maximum width of the main body 100 is Along the thickness direction of the main body 100, the maximum thickness of the main body 100 is B; the diameter of the indoor fan 31 is D, when The diameter D of the indoor fan 31 is the same as the maximum width of the main body 100. There is a strict numerical relationship between the maximum thickness B of the main body 100 and the maximum width. When the thickness is greater than the maximum thickness B, the diameter of the indoor fan 31 can be set to... This ensures that the indoor fan 31, despite the limited thickness of the main body 100, still possesses sufficient size to maintain efficient airflow drive capability. Fan diameter is one of the core parameters determining airflow volume; a larger diameter can drive more airflow at the same rotational speed. When the main body thickness is 100... When the fan diameter is small, if the fan diameter D is too small (e.g.) This can lead to insufficient sweeping area of ​​the fan blades, a significant decrease in airflow, and difficulty in meeting indoor temperature regulation needs. The design maximizes the effective working area of ​​the fan within the thickness limit of the host unit, ensuring sufficient airflow drawn in from the indoor air inlet 111 and efficiently delivered through the air outlet 413 after heat exchange.

[0097] when The dimensions of the indoor fan 31 allow for a more rational spatial arrangement with components such as the volute duct 115, the air outlet duct 413, and the heat exchanger. The indoor fan 31 is located within the first cavity 101, near the indoor air inlet 111. A larger diameter allows it to fit the thinner but wider casing 1, ensuring a reasonable angle between the rotation axis 512 of the indoor fan 31 and the thickness direction of the main body 100, reducing the risk of interference between the indoor fan 31 and the front and rear walls of the casing 1. Simultaneously, the larger fan diameter allows for better matching with the previously designed air inlet width. duct width These parameters are proportionally coordinated to ensure a smooth airflow path from intake to exhaust, reducing increased wind resistance caused by size mismatch. This ensures that the indoor fan 31 can maintain efficient airflow drive capability within a limited thickness space. Meanwhile, under the same air supply volume requirement, a larger diameter indoor fan 31 It can achieve the target air volume at a lower speed, which significantly reduces motor power consumption and improves the air conditioner's energy efficiency ratio compared to the high-speed operation of small-diameter fans. At the same time, the noise generated by the friction between the fan and the airflow and the vibration of the fan blades is less when running at low speed. Combined with the optimized design of the air guide plate 51 inside the air outlet duct 413, the overall operating noise can be further reduced, improving the quietness of the user experience.

[0098] In this application, reference is made to Figure 1 , Figure 3 and Figure 5 The main body 100 can have a thickness direction. The distance from the indoor air inlet 111 to the indoor air outlet 112 of the main body 100 is the thickness direction of the main body 100. It can be understood that the main body 100 can have a front and a rear side arranged opposite to each other. The side of the main body 100 facing the user can be considered the front side of the main body 100. The distance from the front side to the rear side of the main body 100 can be considered the front-rear direction of the main body 100. Since the distance from the front side to the rear side of the main body 100 is the thickness direction, the indoor air inlet 111 is located on the rear side of the main body 100, and the indoor air outlet 112 is located on the front side of the main body 100.

[0099] In this application, reference is made to Figure 1 , Figure 2 , Figure 3 and Figure 5The main body 100 also includes a width direction that is perpendicular to both the height and thickness directions; it should be noted that the thickness and width directions of the main body 100 are the same as the front and back directions mentioned above.

[0100] In this application, reference is made to Figure 3 and Figure 5 The vertical air conditioner indoor unit may also include an air inlet grille 61, which can be installed at the indoor air inlet 111. The air inlet grille 61 adopts a hollow design, and its mesh shape can be square, round, or diamond, etc. The mesh size can be selected according to the actual situation, so that it can effectively block larger impurities such as dust and hair in the airflow from entering the indoor unit, preventing impurities from adhering to the indoor heat exchanger 21 or indoor fan 31 and affecting their working performance, while not causing excessive obstruction to airflow. At the same time, the material of the air inlet grille 61 can be selected with a certain strength and corrosion resistance to ensure its service life. The air inlet grille 61 can be detachably connected to the casing 1, which is convenient for users to disassemble and clean regularly to maintain smooth airflow.

[0101] In this application, reference is made to Figure 3 and Figure 5 Along the width direction of the main body 100, the maximum width of the main body 100 is Along the thickness direction of the main body 100, the maximum thickness of the main body 100 is B.

[0102] In this application, the minimum distance between the indoor heat exchanger 21 and the casing 1 is the first distance. It should be noted that the casing 1 includes a front casing and a rear casing arranged along the thickness direction. The indoor air outlet is located on the front casing, and the indoor air inlet is located on the rear casing. The front casing and the rear casing can be connected by bolts, welding, or other methods. The minimum distance between the indoor heat exchanger 21 and the casing 1 can be the minimum distance from the indoor heat exchanger 21 to the casing 1. If the front casing includes a first connecting part, and the rear casing includes a second connecting part, wherein the first connecting part and the second connecting part extend toward the direction close to the indoor fan 31, then the minimum distance between the indoor heat exchanger 21 and the casing 1 is the minimum distance from the indoor heat exchanger 21 to the first connecting part or the second connecting part.

[0103] In this application, the minimum distance between the indoor heat exchanger 21 and the air inlet grille 61 is the second distance. ; Along the width direction of the main body 100, the maximum width of the main body 100 is... The minimum distance between the indoor heat exchanger 21 and the casing 1 is the first distance H1, which refers to the shortest distance from the outer edge of the indoor heat exchanger 21 near the casing 1 to the inner wall of the casing 1. Of course, if other components are installed on the inner wall of the casing 14, then the first distance H1 is the shortest distance from the outer edge of the indoor heat exchanger 21 to other components on the inner wall of the casing 1. Along the thickness direction of the main body 100, the maximum thickness of the main body 100 is B. The minimum distance between the indoor heat exchanger 21 and the air inlet grille 61 is the second distance H2, which is the shortest distance from the outer edge of the indoor heat exchanger 21 near the air inlet grille 61 to the inner side of the air inlet grille 61. In other words, the minimum of the first distance H1 and the second distance H2 must be greater than or equal to the maximum width of the main body (100). and maximum thickness It is 0.065 times the minimum value in the range.

[0104] pass The design ensures sufficient airflow space around the indoor heat exchanger 21. After airflow enters from the indoor air inlet 111 through the air inlet grille 61, it needs to pass through a certain space to reach the indoor heat exchanger 21. If H1 or H2 is too small, the airflow will encounter significant flow resistance due to the narrow space before reaching the heat exchanger, resulting in reduced airflow around the heat exchanger and affecting the heat exchange effect. Sufficient distance allows the airflow to flow more smoothly to the heat exchanger, ensuring full contact between the heat exchanger surface and the airflow, improving heat exchange efficiency, and guaranteeing the cooling or heating performance of the air conditioner. This distance is set relative to the width of the main body 100. and thickness The design is compatible with the internal heat exchanger 21, which can make the layout of the indoor heat exchanger 21 inside the main body 100 more reasonable while ensuring the airflow space, thus improving the stability and reliability of the whole machine.

[0105] In this application, reference is made to Figure 3 and Figure 5 The indoor unit of the vertical air conditioner may also include an electric auxiliary heater 71, which can be located within the first cavity 101 and between the indoor heat exchanger 21 and the indoor fan 31. The electric auxiliary heater 71 is positioned within the first cavity 101 and between the indoor heat exchanger 21 and the indoor fan 31, on the critical path of the airflow. After the airflow passes through the indoor heat exchanger 21 for heat exchange, it first flows through the electric auxiliary heater 71, then is drawn in by the indoor fan 31 and sent out through the air outlet duct 413. When the ambient temperature is low, the heating efficiency of the air conditioner compressor will decrease significantly, and the heat exchange of the indoor heat exchanger 21 alone is insufficient to meet the indoor heating demand. At this time, the electric auxiliary heater 71 is activated, directly converting electrical energy into heat energy to reheat the airflow that has been initially heated by the indoor heat exchanger 21, significantly increasing the outlet air temperature and quickly compensating for the insufficient heating capacity of the compressor.

[0106] In this application, reference is made to Figure 3 and Figure 5 The minimum distance between the electric auxiliary heater 71 and the indoor heat exchanger 21 is the third distance. The minimum distance between the electric auxiliary heater 71 and the indoor heat exchanger 21 is the second distance. That is, the shortest distance from the outer edge of the electric auxiliary heating 71 near the indoor heat exchanger 21 to the inner side of the indoor heat exchanger 21. And the third distance... This design ensures that the airflow has sufficient space to fully contact the electric auxiliary heater 71 after passing through the heat exchanger, effectively preventing reverse heat transfer and ensuring the normal operation of the indoor heat exchanger 21. It also allows the heated airflow to be quickly drawn into the fan, reducing heat loss within the cavity. The high temperature of the electric auxiliary heater 71 during operation may affect the indoor heat exchanger 21 through thermal radiation or airflow conduction, causing an abnormal increase in the surface temperature of the heat exchanger. At the same time, prolonged high temperature may accelerate the oxidation and corrosion of the fins of the indoor heat exchanger 21, shortening its service life.

[0107] In this application, reference is made to Figure 3 and Figure 5 The indoor unit of the vertical air conditioner may also include an electric auxiliary heater 71, which can be located within the first cavity 101 and between the indoor heat exchanger 21 and the indoor fan 31. The electric auxiliary heater 71 is positioned within the first cavity 101 and between the indoor heat exchanger 21 and the indoor fan 31, on the critical path of the airflow. After the airflow passes through the indoor heat exchanger 21 for heat exchange, it first flows through the electric auxiliary heater 71, then is drawn in by the indoor fan 31 and sent out through the air outlet duct 413. When the ambient temperature is low, the heating efficiency of the air conditioner compressor will decrease significantly, and the heat exchange of the indoor heat exchanger 21 alone is insufficient to meet the indoor heating demand. At this time, the electric auxiliary heater 71 is activated, directly converting electrical energy into heat energy to reheat the airflow that has been initially heated by the indoor heat exchanger 21, significantly increasing the outlet air temperature and quickly compensating for the insufficient heating capacity of the compressor.

[0108] In this application, reference is made to Figure 3 and Figure 5 The minimum distance between the electric auxiliary heater 71 and the outer ring of the indoor fan 31 is the fourth distance. , Where D is the diameter of the indoor fan 31. The minimum distance between the electric auxiliary heater 71 and the outer ring of the indoor fan 31 is the fourth distance. This refers to the shortest distance between the outer edge of the electric auxiliary heater 71 near the indoor fan 31 and the outer ring of the indoor fan 31. The main function of the indoor fan 31 is to drive airflow to circulate within the first chamber 101, and its outer ring will create a strong airflow suction effect when it rotates. If the distance between the electric auxiliary heater 71 and the outer ring of the indoor fan 31 is too close ( This will compress the airflow channel in front of the indoor fan 31, causing turbulence to form due to the narrow space before the airflow enters the indoor fan 31, increasing airflow resistance. The design provides ample buffer space for airflow from the electric auxiliary heater 71 to the indoor fan 31, ensuring that the airflow heated by the electric auxiliary heater 71 is smoothly drawn into the indoor fan 31. This reduces wind resistance loss and ensures that the airflow of the indoor fan 31 is not affected. Simultaneously, sufficient distance allows the airflow to form a stable flow field before entering the indoor fan 31, preventing additional aerodynamic noise caused by turbulent airflow during the operation of the indoor fan 31, thus maintaining the air conditioning's air delivery efficiency and quiet operation.

[0109] 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.

[0110] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1.A vertical air conditioner indoor unit, characterized by, include: The main body, wherein the height of the main body extends from its top to its bottom. The subject includes at least: A housing having an indoor air inlet and an indoor air outlet, the housing enclosing a first cavity, the indoor air outlet and the indoor air inlet communicating with the first cavity; the housing includes: Anterior cochlear tongue; The rear volute tongue forms a volute tongue air duct between the front and rear volute tongues; in a cross section perpendicular to the height direction, the extension length of the rear volute tongue from one end near the indoor air outlet to one end near the indoor air inlet is the first extension length, and the extension length of the front volute tongue from one end near the indoor air outlet to one end near the indoor air inlet is the second extension length, wherein the first extension length is greater than the second extension length. An indoor heat exchanger is disposed within the first cavity; An indoor fan, at least partially disposed within the volute air inlet duct; The indoor fan rotates to allow airflow to enter the first cavity through the indoor air inlet and exchange heat with the indoor heat exchanger. After exchanging heat with the indoor heat exchanger, the airflow flows through the volute duct to the indoor air outlet and then flows from the indoor air outlet to the user's room. In a cross section perpendicular to the height direction, the front volute tongue is closest to a first point of the indoor fan outer ring, the rear volute tongue is closest to a second point of the indoor fan outer ring, and the distance between the first point and the second point is the air inlet width , wherein D is the diameter of the indoor fan. 2.The indoor unit of the vertical air conditioner according to claim 1, characterized in that, The vertical air conditioner indoor unit also includes: The air duct extension includes: A first extension plate and a second extension plate, wherein the first cavity is provided with an air outlet duct located between the first extension plate and the second extension plate; Along the airflow direction within the volute duct, the first end of the first extension plate is connected to the air outlet of the front volute, the second end of the first extension plate is located near the indoor air outlet, the first end of the second extension plate is connected to the air outlet of the rear volute, and the second end of the second extension plate is located near the indoor air outlet. In a cross section perpendicular to the height direction, a connection point of the first extension plate and the front volute tongue is a third point, a connection point of the second extension plate and the rear volute tongue is a fourth point, and a distance between the third point and the fourth point is a duct width , , wherein D is a diameter of the indoor fan. 3.The indoor unit of the vertical air conditioner according to claim 2, characterized in that, Within a cross section perpendicular to the height direction, the straight line containing the third point and the fourth point is defined as the first straight line, and the straight line containing the second endpoint of the first extension plate and the second endpoint of the second extension plate is defined as the second straight line; a distance between the first straight line and the second straight line is a duct extension length L, where D is a diameter of the indoor fan. 4.The indoor unit of the vertical air conditioner according to claim 2, characterized in that, The distance between the first extension plate and the second extension plate gradually increases from the end of the air outlet duct that is closer to the indoor fan towards the indoor air outlet. The first extension plate includes a straight segment and a curved segment. The straight segment is located at one end near the front volute, and the curved segment is located at one end near the indoor air outlet. 5.The indoor unit of the vertical air conditioner according to claim 4, characterized in that, The indoor air inlet to the indoor air outlet of the main body is the thickness direction of the main body, and the main body also includes a width direction that is perpendicular to the height direction and the thickness direction respectively; In a cross-section perpendicular to the height direction, the point where the straight segment and the curved segment connect is point F; A plurality of air guide plates are provided in one end of the air outlet duct near the indoor air outlet. The air guide plates are rotatably arranged in the air outlet duct around their own axis. The plurality of air guide plates are spaced apart along the width direction of the main body. The first air guide plate near the first extension plate is the first air guide plate. When the first air guide plate rotates, point F is located on the maximum contour line formed by the rotation of the endpoint of the first air guide plate. 6.The indoor unit of the vertical air conditioner according to any one of claims 1-5, wherein, The indoor air inlet to the indoor air outlet of the main body is the thickness direction of the main body, and the main body also includes a width direction that is perpendicular to the height direction and the thickness direction respectively; The maximum width of the main body in the width direction of the main body is ; Along the thickness direction of the main body, the maximum thickness of the main body is B; The diameter of the indoor fan is D, and when . 7.The indoor unit of the vertical air conditioner according to any one of claims 1-5, wherein, The indoor air inlet to the indoor air outlet of the main body is the thickness direction of the main body, and the main body also includes a width direction that is perpendicular to the height direction and the thickness direction respectively; The maximum width of the main body in the width direction of the main body is ; Along the thickness direction of the main body, the maximum height of the main body is B; The diameter of the indoor fan is D, when . 8.The indoor unit of the vertical air conditioner according to any one of claims 1-5, wherein, The distance from the indoor air inlet to the indoor air outlet of the main body is along the thickness direction of the main body, and the maximum thickness of the main body is B along the thickness direction of the main body; The main body further includes a width direction perpendicular to the height direction and the thickness direction, respectively, and a maximum width of the main body along the width direction of the main body is ; The vertical air conditioner indoor unit also includes an air inlet grille, which is disposed at the indoor air inlet. The minimum distance between the indoor heat exchanger and the casing is a first distance. The minimum distance between the indoor heat exchanger and the air inlet grille is the second distance. ; . 9.The indoor unit of the vertical air conditioner according to any one of claims 1-5, wherein, The vertical air conditioner indoor unit also includes an electric auxiliary heater, which is located in the first cavity and between the indoor heat exchanger and the indoor fan; The minimum distance of the electric auxiliary heating distance from the indoor heat exchanger is a third distance , . 10.The indoor unit of the vertical air conditioner according to any one of claims 1-5, wherein, The vertical air conditioner indoor unit also includes an electric auxiliary heater, which is located in the first cavity and between the indoor heat exchanger and the indoor fan; The minimum distance of the electric auxiliary heating distance from the outer circle of the indoor fan is a fourth distance , where D is the diameter of the indoor fan.

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