Vertical air conditioner indoor unit

Abstract

This application proposes a vertical air conditioner indoor unit, including a front volute and a rear volute, with a volute air duct formed between the front and rear volutes; an indoor heat exchanger disposed in a first cavity, the indoor heat exchanger including a front fold, a middle fold, and a rear fold connected in sequence; in a cross-section perpendicular to the height direction, the end of the front fold furthest from the middle fold is defined as the first end, and the line connecting the first end and the indoor fan is defined as the first straight line, which is perpendicular to the windward surface of the front fold; the front volute includes a first protrusion extending toward the indoor heat exchanger, the end of the first protrusion near the indoor heat exchanger being defined as the first endpoint; a first distance W exists between the first straight line and the first endpoint. By clearly defining the first distance between the first straight line and the first endpoint of the first protrusion of the front volute, the airflow is prevented from directly impacting the first endpoint of the front volute after heat exchange in the indoor heat exchanger, reducing airflow turbulence near the volute, effectively suppressing the generation of abnormal noise, and improving the quietness of equipment operation.

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 increase, higher requirements are being placed on the air volume of vertical air conditioner indoor units. In the cooperative structure of the indoor heat exchanger and cross-flow fan, the direction of airflow through the indoor heat exchanger and its relative position to the front volute tongue have a significant impact on the stability of equipment operation and noise control. Currently, in most vertical air conditioner indoor units, the airflow passing through the indoor heat exchanger directly impacts the tip of the front volute tongue. This direct impact causes turbulence in the airflow at the tip of the volute tongue, and this turbulent airflow movement can easily trigger abnormal noise during equipment operation, affecting the user experience. Therefore, there is an urgent need to develop a vertical air conditioner indoor unit. Utility Model Content

[0004] The present invention aims to solve, at least to some extent, the technical problems in the related art.

[0005] 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 posterior cochlear tongue, and the cochlear tongue air passage formed between the anterior and posterior cochlear tongues; An indoor heat exchanger is disposed in the first cavity, and the indoor heat exchanger includes a front fold, a middle fold, and a rear fold connected in sequence. An indoor fan is at least partially disposed within the volute inlet duct; a front fold is disposed on the side of the indoor fan near the front volute, and a rear fold is disposed on the side of the indoor fan near the rear volute; 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, and the airflow after heat exchange with the indoor heat exchanger flows through the volute duct to the indoor air outlet and flows into the user's room from the indoor air outlet. In a plane perpendicular to the height direction, the end face of the front fold away from the middle fold is defined as the first end face line, and the extension line of the first end face line extending toward the indoor fan is defined as the first straight line; the front volute includes a first protrusion extending toward the indoor heat exchanger, and the point of the first protrusion closest to the indoor heat exchanger is defined as the first endpoint; along the direction of the normal of the first end face, the distance between the first endpoint and the first straight line is the first distance W, and the first endpoint is located on the side of the first straight line away from the middle fold.

[0006] 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 come into contact with the indoor heat exchanger and maximizing the utilization rate 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 in 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. At the same time, by defining the first straight line and specifying the first distance W between it and the first end point of the first protrusion of the front volute, the airflow is prevented from directly impacting the first end point of the front volute after heat exchange in the indoor heat exchanger, reducing turbulence near the volute and effectively suppressing the generation of abnormal noise, thereby improving the quietness of equipment operation.

[0007] According to an embodiment of this disclosure, the indoor fan includes a plurality of blades, and one end of each blade away from the center of the indoor fan is provided with an outer arc segment; The centers of the outer arc segments of two adjacent blades are at a certain distance from each other.

[0008] In this application, maintaining a certain distance between the centers of the outer arc segments of adjacent blades allows for a more uniform and orderly cutting and propulsion of the airflow during blade rotation. This results in a smoother airflow under the fan's action, further reducing the overall noise level of the airflow system. If the center-to-center distance between the outer arc segments of adjacent blades is too large, the blades' effect on the airflow will be significantly uneven, easily leading to pulse-like disturbances in the airflow, which in turn causes airflow turbulence and noise.

[0009] According to an embodiment of this disclosure, the distance between the centers of the outer arc segments of two adjacent blades is the center-to-center distance. The first distance W is not greater than .

[0010] In this application, the first distance is set to no more than This design avoids direct airflow impact on the first end of the front volute, further ensuring that the airflow will not diffuse excessively due to excessive distance when it reaches the front volute area, thus preventing energy loss. It significantly reduces the possibility of airflow turbulence, thereby more effectively suppressing the generation of abnormal noise. This ensures the coordinated operation between the indoor heat exchanger, indoor fan and front volute, and improves the stability and reliability of the overall equipment structure.

[0011] According to an embodiment of this disclosure, in a cross section perpendicular to the height direction, the minimum distance between the side of the front fold closest to the indoor fan and the outer ring of the indoor fan is a second distance d, the second distance d being no greater than 0.24D, where D is the outer diameter of the indoor fan.

[0012] In this application, the gap between the front fold and the indoor fan can be effectively shortened, reducing the diffusion and stagnation of airflow in that area. When the indoor fan rotates, it creates a negative pressure zone, attracting airflow to it. This allows the airflow to be drawn into the fan more quickly and concentratedly after leaving the front fold and propelled into the volute duct, reducing energy loss caused by diffusion and improving airflow transmission efficiency.

[0013] According to an embodiment of this disclosure, the second distance d is not less than 0.21D, where D is the outer diameter of the indoor fan.

[0014] In this application, the second distance d is not less than 0.21D, which provides a sufficient safety gap between the front fold and the indoor fan. This effectively prevents collisions caused by relative displacement of the front fold and the indoor fan due to inertia in the event of an accidental drop of the equipment. If the front fold and the indoor fan are too close, they are very likely to collide with each other, which could lead to damage to the components.

[0015] According to an embodiment of the present disclosure, the rear volute tongue includes a second protrusion extending toward the indoor heat exchanger, and the rear fold is disposed on the side of the second protrusion away from the indoor fan; The plane containing the windward side of the rear fold is defined as the first plane, the projection of the rear fold onto the first plane is the first projection, the projection of the second protrusion onto the first plane is the second projection, and the first projection and the second projection at least partially overlap along the extension direction of the second protrusion.

[0016] In this application, the second protrusion can effectively guide the airflow after it has been folded back, reducing turbulence caused by airflow diffusion or directional deviation, thereby reducing airflow resistance and noise, and improving the stability of the overall airflow circulation. At the same time, the second protrusion can effectively limit the folding back of the indoor heat exchanger.

[0017] 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 further includes a width direction that is perpendicular to the height direction and the thickness direction, respectively, and the width direction is from the first side end to the second side end of the main body; Along the extending direction of the second protrusion, the length of the overlapping portion of the first projection and the second projection is the overlap length L; 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; when .

[0018] In this application, the dimensional limitations in the width direction of the main body are fully considered, ensuring that the length of the overlapping portion matches the width of the main body, and that excessive space is not occupied due to an excessively large L. If the overlapping length L is too large, it will exceed the limit. Within the range, the overlapping portion of the projection of the rear fold and the second protrusion will extend excessively, potentially compressing the air intake channel and resulting in a narrow air intake space. Limiting L to... Within the specified range, while fulfilling functions such as limiting and guiding airflow, it minimizes the occupation of air intake space, ensuring that the indoor air intake can absorb airflow over a larger area, thus providing a spatial basis for sufficient air intake.

[0019] 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 further includes a width direction that is perpendicular to the height direction and the thickness direction, respectively, and the width direction is from the first side end to the second side end of the main body; Along the extending direction of the second protrusion, the length of the overlapping portion of the first projection and the second projection is the overlap length L; 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; when .

[0020] In this application, the dimensional constraints in the thickness direction of the main body are fully considered, ensuring that the length of the overlapping portion matches the thickness of the main body, and that excessive space is not occupied due to an excessively large L. If the overlapping length L is too large, it will exceed the limits. Within the range, the overlapping portion of the projection of the rear fold and the second protrusion will extend excessively, potentially compressing the air intake channel and resulting in a narrow air intake space. Limiting L to... Within the specified range, while fulfilling functions such as limiting and guiding airflow, it minimizes the occupation of air intake space, ensuring that the indoor air intake can absorb airflow over a larger area, thus providing a spatial basis for sufficient air intake.

[0021] 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. , .

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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

[0026] 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 3A magnified structural diagram of A in the middle; Figure 5 yes Figure 3 A magnified structural diagram of B in the diagram; Figure 6 yes Figure 3 A magnified structural diagram of C; Figure 7 This is a cross-sectional view of a vertical air conditioner indoor unit according to another embodiment of this application; Figure 8 This is a cloud map showing the frontal wind speed distribution of an internal heat exchanger according to an embodiment of this application; Figure 9 This is a cloud map showing the wind speed distribution of the entire machine according to an embodiment of this application.

[0027] 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; First protrusion 1131; Rear volute 114; Second protrusion 1141; Volute air duct 115; Indoor heat exchanger 21; Front fold 211; First straight line 2111; Middle fold 212; Rear fold 213; Indoor fan 31; Blade 311; Outer arc segment 3111; Electric auxiliary heating 41. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] This application discloses a vertical air conditioner indoor unit, as shown in the attached figure below. Figures 1-9 Describe the indoor unit of a floor-standing air conditioner.

[0033] 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.

[0034] In this application, the indoor unit of the vertical air conditioner can be installed upright on a supporting object such as the floor.

[0035] Reference Figures 1-9 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.

[0036] 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 height direction of the main body 100 can also be the length 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, as shown in the reference. Figure 3 ,exist Figure 3 In the middle, the left side of the main body 100 is the first side end, and the right side of the main body 100 is the second side end.

[0037] In this application, the main body 100 may have a front side and a rear side arranged 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-rear direction of the main body 100. Figure 3 In the middle, the upper end of the main body 100 is the rear side of the main body 100, and the lower end of the main body 100 is the front side of the main body 100.

[0038] In this application, the height, width, and front-back directions of the main body 100 can be perpendicular to each other.

[0039] 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.

[0040] In this application, the main body 100 may include a housing 1. (See reference...) Figure 1 , Figure 2 , Figure 3 and Figure 7 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. The indoor air inlet 111 can be located on the rear side of the housing 1.

[0041] In this application, references Figure 3 and Figure 7 An indoor air outlet 112 can be formed on the casing 1. The indoor air outlet 112 can be the outlet for airflow to exit the casing 1.

[0042] In one embodiment, the indoor air outlet 112 may be located on the side of the main body 100; in other embodiments, the heat exchange air outlet may be located on the front of the main body 100. The specific location of the heat exchange air outlet can be adjusted as needed and is not limited here. In this application, the indoor air inlet 111 may be located on the front of the casing 1.

[0043] In this application, references Figure 3 and Figure 7 The housing 1 can be a hollow structure, and the housing encloses and forms a first cavity 101. Both the indoor air outlet 112 and the indoor air inlet 111 can be connected to the first cavity 101.

[0044] In this application, reference is made to Figure 3 and Figure 7 The housing 1 includes a front volute 113 and a rear volute 114, both of which can be disposed within the first cavity 101, forming a volute air duct 115 between them. For example, refer to... Figure 3 and Figure 7 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.

[0045] 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.

[0046] In this application, reference is made to Figure 3 and Figure 7An indoor heat exchanger 21 can be installed within the main body 100, and the indoor heat exchanger 21 can be located within the first cavity 101. The indoor heat exchanger 21 can be used to exchange heat with the airflow within the first cavity 101. The indoor heat exchanger 21 includes a front fold 211, a middle fold 212, and a rear fold 213 connected in sequence. (Referring to...) Figure 3 and Figure 7 The middle fold 212 is arc-shaped, the front fold 211 is located on the left side of the middle fold 212, and the rear fold 213 is located on the right side of the middle fold 212.

[0047] 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.

[0048] In this application, reference is made to Figure 3 and Figure 7 The main body 100 may include an indoor fan 31, which may be at least partially located within the volute inlet duct. The indoor heat exchanger 21 is arranged around the side of the indoor fan 31 not located within the volute duct 115; that is, the front fold 211 is located on the side of the indoor fan 31 near the front volute 113, and the rear fold 213 is located on the side of the indoor fan 31 near the rear volute 114. 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 duct 115 to the indoor air outlet 112 and exit through the indoor air outlet 112.

[0049] In this application, the outdoor unit of an air conditioner may include an outdoor unit housing. The outdoor unit housing may contain an outdoor receiving space. The outdoor unit may include an outdoor heat exchanger. The outdoor heat exchanger may be located within the outdoor receiving space.

[0050] In this application, the outdoor unit of the air conditioner may also include an outdoor fan. The outdoor fan may be located within an outdoor enclosure.

[0051] In this application, the outdoor unit housing 1 may be provided with an outdoor air inlet. The outdoor air inlet may communicate with the outdoor enclosure space. The outdoor air inlet can be used to introduce outdoor airflow into the outdoor enclosure space. 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 can be used to lead the airflow in the outdoor enclosure space out of the outdoor enclosure space. The rotation of the outdoor fan causes the outdoor airflow to enter the outdoor enclosure space through the outdoor air inlet and exchange heat with the outdoor heat exchanger. The heat-exchanged outdoor airflow flows out of the outdoor enclosure space through the outdoor air outlet.

[0052] In this application, the air conditioner may include a compressor. The compressor may be located in an outdoor enclosure.

[0053] 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.

[0054] In this application, one of the indoor heat exchanger 21 and the outdoor heat exchanger is a condenser and the other is an evaporator.

[0055] 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.

[0056] In this application, the compressor compresses the refrigerant gas at a low temperature and low pressure and discharges it at a high temperature and high pressure. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The throttling device causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant.

[0057] 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.

[0058] 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; when the indoor heat exchanger 2121 is used as an evaporator, the air conditioner is used as a cooler in cooling mode.

[0059] In this application, reference is made to Figure 3 , Figure 4 and Figure 7 The end face of the front fold 211 away from the middle fold 212 is the first end face, that is, the end of the front fold 211 closest to the indoor air outlet 112 is the first end face. In a plane perpendicular to the height direction, the end face of the front fold away from the middle fold is the first end face line, and the extension line of the first end face line extending toward the indoor fan 31 is defined as the first straight line 2111. The front volute 113 includes a first protrusion 1131 extending toward the indoor heat exchanger 21, and the point of the first protrusion 1131 closest to the indoor heat exchanger 21 is the first endpoint; along the direction of the normal of the first end face, the distance between the first straight line 2111 and the first endpoint is the first distance W, and the first endpoint is located on the side of the first straight line 2111 away from the middle fold 212.

[0060] Reference Figure 8 Since the airflow entering the first chamber 101 flows through the indoor heat exchanger 21 in the direction of maximum pressure difference, the airflow direction is usually perpendicular to the surface of the indoor heat exchanger 21. Therefore, by defining the first straight line 2111, that is, the extension direction of the first straight line 2111 is parallel to the path of the airflow after passing through the indoor heat exchanger 21 to reach the indoor fan 31, it is clear that there is a first distance W between the first straight line 2111 and the first end point of the first protrusion 1131 of the front volute tongue 113. This can prevent the airflow from directly impacting the first end point of the front volute tongue 113 after heat exchange in the indoor heat exchanger 21, reduce the turbulence of the airflow near the volute tongue, and thus effectively suppress the generation of abnormal noise and improve the quietness of equipment operation.

[0061] In this application, reference is made to Figure 3 , Figure 5 and Figure 7 The indoor fan 31 includes several blades 311. Each blade 311 has an outer arc segment 3111 at its end furthest from the center. The centers of the outer arc segments 3111 of adjacent blades 311 are spaced apart. It should be noted that the distance between the centers of the outer arc segments 3111 of adjacent blades 311 can be limited according to the specific specifications of the indoor fan. That is, in different implementations, the center-to-center distance between adjacent blades 311 can be the same or different. Therefore, no specific limitation is made in this design.

[0062] In one specific embodiment, the distance between the centers of the outer arc segments 3111 of two adjacent blades 311 can be between 14.0-14.4 mm, specifically 14.2 mm.

[0063] In this application, by setting a certain distance between the outer arc segments 3111 of two adjacent blades 311, the cutting and pushing of the airflow by the blades 311 during rotation can be made more uniform and orderly, resulting in a more stable airflow under the action of the fan. This can further reduce the noise level of the overall airflow system and extend the service life of the fan. If the center distance of the outer arc segments 3111 of adjacent blades 311 is inconsistent, the interaction between the blades 311 and the airflow will be significantly different when they rotate. Some areas may generate high-frequency noise due to excessively high airflow speed or drastic pressure changes, while other areas may generate vortex noise due to insufficient airflow disturbance.

[0064] In this application, the distance between the centers of the outer arc segments 3111 of two adjacent blades 311 is the center distance. The first distance W is not greater than In other words, the line connecting the first end of the front fold 211 and the indoor fan 31 to the first end point of the first protrusion 1131 cannot overlap, but the first distance W between them must also be less than or equal to... If the center distance is When the distance is 14.2mm, the first distance .

[0065] In this application, reference is made to Figure 9 The distance between the first straight line 2111 and the first endpoint is set to be no greater than Within this range, it can prevent the airflow from directly impacting the first end of the front volute 113 after heat exchange in the indoor heat exchanger 21, reducing airflow turbulence near the volute and effectively suppressing abnormal noise. It also ensures that the airflow reaches the indoor fan 31 smoothly, improving the quietness of equipment operation. This ensures coordinated operation between the indoor heat exchanger 21, indoor fan 31, and front volute 113, enhancing the stability and reliability of the overall equipment structure. If the first distance is too large, excessive airflow diffusion will occur. When the diffused airflow enters the volute duct 115, it will be difficult to form a concentrated and efficient flow pattern, increasing resistance during airflow transmission, reducing overall airflow circulation efficiency, and weakening heat exchange and air delivery effects, resulting in energy loss.

[0066] In this application, reference is made to Figure 3 In the cross section perpendicular to the height direction, the minimum distance between the side of the front fold 211 closest to the indoor fan 31 and the outer ring of the indoor fan 31 is the second distance d, which is no greater than 0.24D, where D is the outer diameter of the indoor fan 31.

[0067] In this application, reference is made to Figure 9 By setting the second distance to a range of less than or equal to 0.24D, the gap between the front fold 211 and the indoor fan 31 can be effectively shortened, reducing the diffusion and stagnation of airflow in this area. When the indoor fan 31 rotates, it creates a negative pressure zone, attracting airflow to it and increasing the intake air volume. This allows the airflow to be drawn into the fan more quickly and concentratedly after leaving the front fold 211 and pushed to the volute duct 115, reducing energy loss caused by diffusion, improving airflow transmission efficiency, and ensuring the heat exchange intensity between the indoor heat exchanger 21 and the airflow.

[0068] If the second distance d is too large, the airflow will not diffuse unnecessarily before reaching the outer ring of the fan due to the ample space after it flows out from the front fold 211 of the indoor heat exchanger 21. This will result in the loss of some airflow kinetic energy and may also form local vortices, affecting the smoothness of the overall airflow circulation.

[0069] In this application, reference is made to Figure 3The second distance d is not less than 0.21D, where D is the outer diameter of the indoor fan 31.

[0070] In this application, reference is made to Figure 9 The second distance d is set to a range of not less than 0.21D. While ensuring that the diffusion and stagnation of airflow in the area between the indoor heat exchanger 21 and the indoor fan 31 are reduced, the outer diameter D of the indoor fan 31 is fully considered, making the layout between the front fold 211 and the fan more compact and reasonable. A suitable safety gap is reserved, reducing the risk of collision between the indoor heat exchanger 21 and the indoor fan 31 when falling, thus balancing the performance and safety of the equipment.

[0071] If the second distance d is less than 0.21D, the safety clearance between the front fold 211 and the indoor fan 31 will be severely insufficient. The indoor fan 31 will generate continuous vibration when rotating at high speed, and the front fold 211, as part of the indoor heat exchanger 21, may also experience slight shaking during operation. An excessively small clearance will make it extremely easy for the two to rub or even collide during vibration, not only producing a harsh noise but also causing wear on the blades 311 or the surface of the front fold 211, significantly shortening the equipment's service life.

[0072] In this application, reference is made to Figure 3 , Figure 6 and Figure 7 The rear volute 114 includes a second protrusion 1141 extending toward the indoor heat exchanger 21, and a rear fold 213 is disposed on the side of the second protrusion 1141 away from the indoor fan 31; the plane on which the windward surface of the rear fold 213 is located is defined as the first plane, the projection of the rear fold 213 on the first plane is the first projection, and the projection of the second protrusion 1141 on the first plane is the second projection. Along the extension direction of the second protrusion 1141, the first projection and the second projection at least partially overlap, that is, the first projection and the second projection have an overlapping portion.

[0073] In this application, reference is made to Figure 8 and Figure 9 The second protrusion 1141 effectively guides the airflow after passing through the rear bend 213. After the airflow completes heat exchange through the rear bend 213 of the indoor heat exchanger 21, its flow direction and velocity need to smoothly transition into the volute tongue duct 115. Since the rear bend 213 and the second protrusion 1141 overlap to a certain extent, it ensures that the airflow will not spread to both sides due to loss of restraint during its flow from the rear bend 213 to the volute tongue duct 115, reducing the generation of eddies and turbulence, making the airflow smoother, reducing turbulence caused by airflow diffusion or directional deviation, thereby reducing airflow resistance and noise, and improving the stability of the overall airflow circulation. At the same time, the second protrusion 1141 can effectively limit the rear bend 213 of the indoor heat exchanger 21, preventing the indoor heat exchanger 21 from shifting.

[0074] In this application, 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, as shown in the reference. Figure 3 and Figure 7 ,exist Figure 1 In this design, the left side of the main body 100 is the first side end, and the right side of the main body 100 is the second side end. The main body 100 may 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. Figure 1 In this configuration, the upper end of the main body 100 is its rear side, and the lower end of the main body 100 is its front side. The height, width, and front-back directions of the main body 100 can be perpendicular to each other.

[0075] In this application, reference is made to Figure 3 and Figure 7 Along the extending direction of the second protrusion 1141, the length of the overlapping portion of the first projection and the second projection is the overlap length L. 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; when .

[0076] In this application, reference is made to Figure 8 and Figure 9 This design fully considers the dimensional limitations in the width direction of the main body 100, ensuring that the length of the overlapping portion matches the width of the main body 100, and preventing excessive space occupation due to an excessively large overlapping length L. Furthermore, limiting L to... Within the specified range, the airflow path after entering through the indoor air inlet 111 is satisfied, reducing air intake resistance. After entering the first cavity 101 through the indoor air inlet 111, the airflow needs to pass through parts such as the rear bend 213 of the indoor heat exchanger 21, and the length of the overlapping portion affects the airflow direction near the rear bend 213. When the overlap length L is... This design achieves effective coordination between the rear bend 213 and the second protrusion 1141, guiding the airflow smoothly to the subsequent path, while preventing airflow congestion near the rear bend 213 due to excessive overlap. It allows the incoming airflow to maintain a smooth flow when passing through the rear bend 213, reducing airflow loss caused by path obstruction, ensuring more airflow can smoothly enter the equipment to participate in heat exchange, improving airflow efficiency, minimizing the occupation of airflow space, and ensuring that the indoor air inlet 111 can absorb airflow over a larger area, providing a spatial basis for sufficient airflow.

[0077] If the overlap length L is too large, it exceeds... The overlapping portion of the projection of the rear fold 213 and the second protrusion 1141 may extend excessively, potentially squeezing the air intake channel and causing narrow air intake space. This could lead to excessive restriction of local air intake and uneven air intake.

[0078] In this application, Figure 3 and Figure 7 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; when .

[0079] In this application, reference is made to Figure 8 and Figure 9 This design fully considers the dimensional limitations in the thickness direction of the main body 100, ensuring that the length of the overlapping portion matches the thickness of the main body 100, and preventing excessive space occupation due to an excessively large overlapping length L. Furthermore, limiting L to... Within the specified range, the airflow path after entering through the indoor air inlet 111 is satisfied, reducing air intake resistance. After entering the first cavity 101 through the indoor air inlet 111, the airflow needs to pass through parts such as the rear bend 213 of the indoor heat exchanger 21, and the length of the overlapping portion affects the airflow direction near the rear bend 213. When the overlap length L is... This design achieves effective coordination between the rear bend 213 and the second protrusion 1141, guiding the airflow smoothly to the subsequent path, while preventing airflow congestion near the rear bend 213 due to excessive overlap. It allows the incoming airflow to maintain a smooth flow when passing through the rear bend 213, reducing airflow loss caused by path obstruction, ensuring more airflow can smoothly enter the equipment to participate in heat exchange, improving airflow efficiency, minimizing the occupation of airflow space, and ensuring that the indoor air inlet 111 can absorb airflow over a larger area, providing a spatial basis for sufficient airflow.

[0080] If the overlap length L is too large, it exceeds... The overlapping portion of the projection of the rear fold 213 and the second protrusion 1141 may extend excessively, potentially squeezing the air intake channel and causing narrow air intake space. This could lead to excessive restriction of local air intake and uneven air intake.

[0081] In this application, reference is made to Figure 3 and Figure 7The indoor unit of the vertical air conditioner may also include an electric auxiliary heater 41, 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 41 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 41, then is drawn in by the indoor fan 31 and sent out through the air outlet duct. 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 41 is activated, directly converting electrical energy into heat energy to reheat the airflow that has been preliminarily heated by the indoor heat exchanger 21, significantly increasing the outlet air temperature and quickly compensating for the insufficient heating capacity of the compressor.

[0082] In this application, reference is made to Figure 3 and Figure 7 The minimum straight-line distance between the electric auxiliary heater 41 and the indoor heat exchanger 21 is the third distance. The minimum straight-line distance between the electric auxiliary heater 41 and the indoor heat exchanger 21 is the third distance. That is, the shortest distance from the outer edge of the electric auxiliary heating 41 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 41 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 41 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.

[0083] In this application, reference is made to Figure 3 and Figure 7 The indoor unit of the vertical air conditioner may also include an electric auxiliary heater 41, 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 41 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 41, then is drawn in by the indoor fan 31 and sent out through the air outlet duct. 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 41 is activated, directly converting electrical energy into heat energy to reheat the airflow that has been preliminarily heated by the indoor heat exchanger 21, significantly increasing the outlet air temperature and quickly compensating for the insufficient heating capacity of the compressor.

[0084] In this application, reference is made to Figure 3 and Figure 7 The minimum straight-line distance between the electric auxiliary heater 41 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 41 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 41 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 41 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 41 to the indoor fan 31, ensuring that the airflow heated by the electric auxiliary heater 41 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.

[0085] 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.

[0086] 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 in that, 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 posterior cochlear tongue, and the cochlear tongue air passage formed between the anterior and posterior cochlear tongues; An indoor heat exchanger is disposed in the first cavity, and the indoor heat exchanger includes a front fold, a middle fold, and a rear fold connected in sequence. An indoor fan is at least partially disposed within the volute inlet duct; a front fold is disposed on the side of the indoor fan near the front volute, and a rear fold is disposed on the side of the indoor fan near the rear volute; 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, and the airflow after heat exchange with the indoor heat exchanger flows through the volute duct to the indoor air outlet and flows into the user's room from the indoor air outlet. In a plane perpendicular to the height direction, the end face of the front fold away from the middle fold is defined as the first end face line, and the extension line of the first end face line extending toward the indoor fan is defined as the first straight line; the front volute includes a first protrusion extending toward the indoor heat exchanger, and the point of the first protrusion closest to the indoor heat exchanger is defined as the first endpoint; along the direction of the normal of the first end face, the distance between the first endpoint and the first straight line is the first distance W, and the first endpoint is located on the side of the first straight line away from the middle fold.

2. The vertical air conditioner indoor unit according to claim 1, characterized in that, The indoor fan includes a plurality of blades, and the end of each blade away from the center of the indoor fan is provided with an outer arc segment; The centers of the outer arc segments of two adjacent blades are at a certain distance.

3. The vertical air conditioner indoor unit according to claim 2, characterized in that, The distance between the centers of the outer arc segments of two adjacent blades is the center distance. The first distance W is not greater than .

4. The vertical air conditioner indoor unit according to claim 1, characterized in that, In a cross section perpendicular to the height direction, the minimum distance between the side of the front fold closest to the indoor fan and the outer ring of the indoor fan is a second distance d, where the second distance d is not greater than 0.24D, and D is the outer diameter of the indoor fan.

5. The vertical air conditioner indoor unit according to claim 4, characterized in that, The second distance d is not less than 0.21D, where D is the outer diameter of the indoor fan.

6. The vertical air conditioner indoor unit according to any one of claims 1-5, characterized in that, The rear volute tongue includes a second protrusion extending toward the indoor heat exchanger, and the rear fold is disposed on the side of the second protrusion away from the indoor fan; The plane containing the windward side of the rear fold is defined as the first plane, the projection of the rear fold onto the first plane is the first projection, the projection of the second protrusion onto the first plane is the second projection, and the first projection and the second projection at least partially overlap along the extension direction of the second protrusion.

7. The vertical air conditioner indoor unit according to claim 6, 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; Along the extending direction of the second protrusion, the length of the overlapping portion of the first projection and the second projection is the overlap length L; 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; when .

8. The vertical air conditioner indoor unit according to claim 6, 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; Along the extending direction of the second protrusion, the length of the overlapping portion of the first projection and the second projection is the overlap length L; 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; when .

9. The vertical air conditioner indoor unit according to any one of claims 1-5, characterized in that, 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 between the electric auxiliary heating element and the indoor heat exchanger is the third distance. , .

10. The vertical air conditioner indoor unit according to any one of claims 1-5, characterized in that, 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 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.

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