Wall mounted air conditioner indoor unit

Abstract

The utility model discloses a hanging type air conditioner indoor unit, belonging to the technical field of air conditioner. The hanging type air conditioner indoor unit comprises: a shell, the top and the front bottom of which are respectively provided with an air conditioner air inlet and an air conditioner air outlet; an indoor heat exchanger and a cross-flow fan, which are arranged in the shell; a driving motor, which is connected to the cross-flow fan; the cross-flow fan comprises: an end cover, a shaft cover and a plurality of wind wheel sections which are sequentially fixedly connected between the end cover and the shaft cover; the plurality of wind wheel sections comprise at least two first wind wheel sections and at least two second wind wheel sections; the first wind wheel section is close to the shaft cover relative to the second wind wheel section and its length is less than the length of the second wind wheel section, and the length of the second wind wheel section is l. 65mm≤l. l≤72mm. By setting the length of the first wind wheel section to be less than the length of the second wind wheel section, the structural strength of the shaft cover end of the cross-flow fan is enhanced to avoid failure of the shaft cover end when falling; at the same time, the length of the second wind wheel section is set within a reasonable range to avoid air volume attenuation.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a hanging type air conditioner indoor unit. Background Art

[0002] The housing of the indoor unit of the wall-mounted air conditioner at least includes an air inlet and an air outlet connected to the room. A cross-flow fan, an indoor heat exchanger and a drive motor are arranged inside the housing. The drive motor is connected to the cross-flow fan to drive the cross-flow fan to rotate. The cross-flow fan rotates to introduce indoor air from the air inlet into the housing, and after heat exchange in the indoor heat exchanger, it flows into the room from the air outlet.

[0003] The cross-flow fan is arranged to extend along the length direction of the housing. The cross-flow fan includes end covers and shaft covers at both ends thereof, and several wind wheel sections between the end covers and the shaft covers. In the related art, the cross-flow fan usually uses several wind wheel sections of the same length. In actual operation, the centrifugal forces on different wind wheel sections are not exactly the same, so there is a risk of failure at certain weak locations.

[0004] In the whole machine drop test, one end of the shaft cover of a conventional cross-flow fan often faces the risk of failure, and the cross-flow fan of the indoor unit of a wall-mounted air conditioner is relatively long, and is easily flexed and deformed under the influence of gravity, and the deformation deflection in the middle position is the largest, which will not only cause the deterioration of the air conditioner sound quality, but also increase the risk of collision of the cross-flow fan during transportation. In addition, if the length of the middle section of the wind wheel is too long, the efficiency of the cross-flow fan will be reduced, and the cross-flow fan will be subjected to greater mechanical stress, affecting its life and reliability. If the length of the middle section of the wind wheel is too short, it will limit the output of air volume, resulting in serious air volume loss. Therefore, it is extremely important to reasonably set the length of several middle sections of the wind wheel of the cross-flow fan. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end,

[0006] The housing has an air-conditioning air inlet and an air-conditioning air outlet on the top and the front bottom, respectively;

[0007] An indoor heat exchanger is disposed in the shell and is used to perform heat exchange on the air in the shell;

[0008] A cross-flow fan is arranged in the housing and below the indoor heat exchanger; indoor airflow enters the housing through the air inlet of the air conditioner under the action of the cross-flow fan, and is output to the room through the air outlet of the air conditioner after heat exchange in the indoor heat exchanger;

[0009] A driving motor connected to the cross-flow fan to drive the cross-flow fan to rotate;

[0010] The cross-flow fan comprises:

[0011] an end cover, forming one end of the crossflow fan and connected to the drive motor;

[0012] A shaft cover, forming the other end of the cross-flow fan;

[0013] A plurality of wind wheel middle sections are fixedly connected in sequence between the end cover and the shaft cover;

[0014] The plurality of wind rotor middle sections include at least two first wind rotor middle sections and at least two second wind rotor middle sections connected in sequence;

[0015] Among them, the first wind wheel middle section is arranged close to the shaft cover relative to the second wind wheel middle section, the length of the first wind wheel middle section is smaller than the length of the second wind wheel middle section, and the length of the second wind wheel middle section is l, 65mm≤l, l≤72mm.

[0016] The wall-mounted air-conditioning indoor unit provided by the present technical solution enhances the structural strength of the shaft cover end of the cross-flow fan by setting the length of the first wind wheel middle section to be smaller than the length of the second wind wheel middle section, thereby avoiding failure of the shaft cover end when falling; at the same time, the length of the second wind wheel middle section is set within a reasonable range, thereby avoiding air volume attenuation to a certain extent.

[0017] The utility model also provides a hanging type air conditioner indoor unit, which comprises:

[0018] The housing has an air-conditioning air inlet and an air-conditioning air outlet on the top and the front bottom, respectively;

[0019] An indoor heat exchanger is disposed in the shell and is used to perform heat exchange on the air in the shell;

[0020] A cross-flow fan is arranged in the housing and below the indoor heat exchanger; indoor airflow enters the housing through the air inlet of the air conditioner under the action of the cross-flow fan, and is output to the room through the air outlet of the air conditioner after heat exchange in the indoor heat exchanger;

[0021] A driving motor connected to the cross-flow fan to drive the cross-flow fan to rotate;

[0022] The cross-flow fan comprises:

[0023] an end cover, forming one end of the crossflow fan and connected to the drive motor;

[0024] A shaft cover, forming the other end of the cross-flow fan;

[0025] A plurality of wind wheel middle sections are fixedly connected in sequence between the end cover and the shaft cover;

[0026] The plurality of wind rotor middle sections include at least two first wind rotor middle sections and at least two second wind rotor middle sections;

[0027] Among them, the first wind wheel middle section is close to the middle position of the cross-flow fan relative to the second wind wheel middle section, the length of the first wind wheel middle section is smaller than the length of the second wind wheel middle section, and the length of the second wind wheel middle section is l, 65mm≤l, l≤72mm.

[0028] The wall-mounted air-conditioning indoor unit provided by the present technical solution reduces the deformation deflection of the middle position of the cross-flow fan by setting the length of the middle section of the first wind wheel to be smaller than the length of the middle section of the second wind wheel, thereby avoiding the deterioration of the air-conditioning sound quality and reducing the risk of collision of the cross-flow fan during transportation; at the same time, the length of the middle section of the second wind wheel is set within a reasonable range to avoid air volume attenuation to a certain extent.

[0029] In some embodiments, the length of the cross-flow fan is defined as L, the number of the second wind wheel sections is n0-n1, the number of the first wind wheel sections is n1+△, and the length of the first wind wheel section is in, n1≥1, △≤n1, n0 and △ are positive integers; on the basis of not changing the length L of the cross-flow fan, the number and length of the first wind wheel sections are reasonably adjusted to avoid increasing the number of end plates of the wind wheel sections, thereby avoiding serious air volume loss.

[0030] In some embodiments, the length of the cross-flow fan is defined as L, the number of the second wind wheel sections is n0-n1, the number of the first wind wheel sections is n1+△, the length of the second wind wheel sections is not less than 1 / 2, and the lengths of adjacent first wind wheel sections are not equal; wherein, n1≥1, △≤n1, n0 and △ are positive integers; on the basis of not changing the length L of the cross-flow fan, the number and length of the sections in the first wind wheel are reasonably adjusted to avoid serious air volume loss; at the same time, the lengths of the sections in the first wind wheel are not equal, which can specifically enhance the strength of local fan blades and avoid the risk of failure in weak positions.

[0031] In some embodiments, the length of the first wind rotor mid-section is not less than 1 / 2, and the lengths of at least two of the first wind rotor mid-sections are equal or unequal.

[0032] The utility model also provides a hanging type air conditioner indoor unit, which comprises:

[0033] The housing has an air-conditioning air inlet and an air-conditioning air outlet on the top and the front bottom, respectively;

[0034] An indoor heat exchanger is disposed in the shell and is used to perform heat exchange on the air in the shell;

[0035] A cross-flow fan is arranged in the housing and below the indoor heat exchanger; indoor airflow enters the housing through the air inlet of the air conditioner under the action of the cross-flow fan, and is output to the room through the air outlet of the air conditioner after heat exchange in the indoor heat exchanger;

[0036] A driving motor connected to the cross-flow fan to drive the cross-flow fan to rotate;

[0037] The cross-flow fan comprises:

[0038] an end cover, forming one end of the crossflow fan and connected to the drive motor;

[0039] A shaft cover, forming the other end of the cross-flow fan;

[0040] A plurality of wind wheel middle sections are fixedly connected in sequence between the end cover and the shaft cover;

[0041] Among them, the lengths of the multiple wind wheel middle sections show a decreasing trend in the direction from the end cover to the shaft cover, and the length of the wind wheel middle section is not less than 1 / 2; among them, 65mm≤1, l≤72mm.

[0042] The wall-mounted air-conditioning indoor unit provided by the technical solution sets the lengths of multiple wind wheel middle sections of the cross-flow fan to show a decreasing trend in the direction from the end cover to the shaft cover, so that the length of the wind wheel middle section on the shaft cover side is relatively small, thereby enhancing the structural strength of the shaft cover end of the cross-flow fan and avoiding failure of the shaft cover end when it falls; at the same time, the length of the wind wheel middle section is set to be not less than 1 / 2 to avoid being too short and affecting the air volume.

[0043] In some embodiments, the lengths of the plurality of wind wheel sections are arranged in an arithmetic progression, so that the cross-flow fan can achieve a more uniform airflow distribution.

[0044] In some of the embodiments, the difference between the lengths of two adjacent wind wheel sections is b, 1mm≤b, b≤2.5mm; the difference b is set within a reasonable range to make the airflow distribution more uniform while avoiding affecting the sound quality level.

[0045] In some embodiments, the length of the wind wheel middle section connected to the end cover is l.

[0046] In some of the embodiments, the length of the middle section of the wind wheel does not exceed 1. This arrangement prevents the middle section of the wind wheel from being too long, which may cause deformation or breakage, thereby improving the life and reliability of the cross-flow fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of an embodiment of an indoor unit of an air conditioner of the present application;

[0048] Figure 2 It is a structural schematic diagram of an air guide plate opening an air outlet of an air conditioner in one embodiment of an air conditioner indoor unit of the present application;

[0049] Figure 3 is a front view of an embodiment of an indoor unit of an air conditioner of the present application;

[0050] Figure 4 yes Figure 3 Sectional view in the AA direction;

[0051] Figure 5 This is a schematic diagram of the structure of the outer cover of an embodiment of the indoor unit of the air conditioner of the present application;

[0052] Figure 6 It is a structural schematic diagram of an indoor heat exchanger assembled on a base in one embodiment of an indoor unit of an air conditioner of the present application;

[0053] Figure 7 It is a structural schematic diagram of a cross-flow fan assembled on a base in one embodiment of an indoor unit of an air conditioner of the present application;

[0054] Figure 8 This is a schematic diagram of the connection between the drive motor and the cross-flow fan in one embodiment of the wall-mounted air conditioner indoor unit of the present application;

[0055] Fig. 9 It is a structural schematic diagram of a cross-flow fan in one embodiment of a wall-mounted air conditioner indoor unit of the present application;

[0056] Fig.10 It is a schematic diagram of the middle section structure of the wind wheel of the cross-flow fan in one embodiment of the wall-mounted air conditioner indoor unit of the present application;

[0057] Fig.11 It is a structural schematic diagram of a cross-flow fan in another embodiment of a wall-mounted air conditioner indoor unit of the present application;

[0058] Fig.12 It is a structural schematic diagram of a cross-flow fan in one embodiment of a wall-mounted air conditioner indoor unit of the present application;

[0059] Figures 13 to 20 It is a schematic diagram of the structure of the cross-flow fan in different embodiments of the wall-mounted air-conditioning indoor unit of the present application.

[0060] In the above figures: a wall-mounted air conditioner indoor unit 100; a housing 1; a base 11; an outer cover 12; an air inlet 13 for the air conditioner; an air outlet 14 for the air conditioner; an air guide plate 15; an air inlet grille 16; an indoor heat exchanger 2; a cross-flow fan 3; an end cover 31; a shaft cover 32; a wind wheel section 33; a first wind wheel section 331; a second wind wheel section 332; and a drive motor 4. DETAILED DESCRIPTION

[0061] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0062] Reference to "embodiment" in the present invention means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present application may be combined with other embodiments without conflict.

[0063] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] The wall-mounted air-conditioning indoor unit provided by the embodiment of the utility model can have various implementation forms.

[0067] in, Figures 1 to 20 This is an illustrative embodiment of the indoor unit of the wall-mounted air conditioner of the utility model. The indoor unit of the wall-mounted air conditioner is a part of the wall-mounted air conditioner, which is arranged indoors and used to exchange heat with the indoor environment. The wall-mounted air conditioner may include an outdoor unit of the air conditioner, which is usually arranged outdoors and used to bring indoor heat to the outdoors.

[0068] refer to Figure 1 to Figure 3 In this embodiment, the wall mounted air conditioner indoor unit comprises a housing 1. The housing 1 is installed indoors, and the housing 1 forms the overall appearance of the wall mounted air conditioner indoor unit.

[0069] Continue to refer Figure 1 The housing 1 is roughly rectangular. The housing 1 has a top and a bottom, and the top and the bottom of the housing 1 are two opposite ends of the housing 1 in the height direction. The left side of the housing 1 and the right side of the housing 1 are two opposite sides of the housing 1 in the length direction, and the front side of the housing 1 and the rear side of the housing 1 are two opposite sides of the housing 1 in the thickness direction.

[0070] The shell 1 is arranged on the top of the room or in the upper space of the room, the front side of the shell 1 is arranged toward the user, and the rear side of the shell 1 is arranged toward the wall, suitable for being connected to the wall.

[0071] It should be noted that the direction described in the article is based on the direction in which the user faces the wall-mounted air-conditioning indoor unit, wherein the side of the wall-mounted air-conditioning indoor unit facing the user when in use is defined as the front side, the opposite side is defined as the rear side, and the left and right sides are distinguished based on the direction in which the user faces the wall-mounted air-conditioning indoor unit.

[0072] A heat exchange air duct is formed inside the housing 1. The heat exchange air duct is used to accommodate and fix various components in the wall-mounted air conditioner indoor unit 100, which can prevent foreign objects from colliding with various components in the housing 1, thereby improving the reliability of the wall-mounted air conditioner indoor unit 100 during transportation or installation.

[0073] In some embodiments of the present application, reference Figure 2 The housing 1 may include an air-conditioning air inlet 13 .

[0074] The air conditioning inlet 13 is connected to the heat exchange duct. The air conditioning inlet 13 serves as an inlet for the external air to flow into the housing 1 , allowing the indoor air to enter the heat exchange duct through the air conditioning inlet 13 .

[0075] In some embodiments of the present application, reference Figure 2 The housing 1 may include an air conditioning outlet 14 .

[0076] The air conditioning outlet 14 is connected to the heat exchange air duct, and serves as an outlet for the heat exchange air flow in the shell 1 to flow out, allowing the air flow in the heat exchange air duct to flow out through the air conditioning outlet 14 .

[0077] The air inlet 13 of the air conditioner can be opened at the top of the housing 1. The air outlet 14 of the air conditioner can be opened at the front side of the housing 1 and arranged near the bottom of the housing 1, that is, the air outlet 14 of the air conditioner is located at the bottom of the front side of the housing 1. In this embodiment, when the indoor air conditioner is working, the indoor air conditioner 100 of the hanging type takes in air from the upper side and discharges air toward the front side, which is convenient for arrangement.

[0078] The air-conditioning outlet 14 may be in a long strip shape, and the air-conditioning outlet 14 may be extended along the length direction of the housing 1 , thereby improving the aesthetics of the wall-mounted air-conditioning indoor unit 100 .

[0079] Continue to refer Figure 2 In some embodiments of the present application, the wall-mounted air-conditioning indoor unit 100 may include an air guide plate 15 .

[0080] The air guide plate 15 is rotatably connected to the housing 1, and is disposed at the air-conditioning outlet 14. The air guide plate 15 opens or closes the air-conditioning outlet 14, and when the air guide plate 15 opens the air-conditioning outlet 14, it is used to guide the heat exchange airflow.

[0081] In some embodiments of the present application, the wall-mounted air-conditioning indoor unit 100 may include an air inlet grille 16 .

[0082] The air inlet grille 16 is disposed at the air inlet 13 of the air conditioner and is used to filter the air to prevent larger impurities from entering the heat exchange air duct.

[0083] In some embodiments of the present application, reference Figure 4 , Figure 6 The wall mounted air conditioner indoor unit 100 may include an indoor heat exchanger 2. The indoor heat exchanger 2 extends along the length direction of the shell 1, and the indoor heat exchanger 2 is arranged in the heat exchange air duct for heat exchange with the air flow in the shell 1.

[0084] In some embodiments of the present application, the wall-mounted air-conditioning indoor unit 100 may include a cross-flow fan 3 .

[0085] The cross-flow fan 3 is arranged in the heat exchange air duct, and the axial direction of the cross-flow fan 3 extends along the length direction of the shell 1, and is used to drive the indoor air outside the shell 1 to enter the heat exchange air duct in the shell 1 through the air inlet. The cross-flow fan 3 drives the air in the heat exchange air duct to flow along the air-conditioning inlet 13 toward the air-conditioning outlet 14.

[0086] refer to Figure 6 , Figure 7 , the crossflow fan 3 is arranged below the indoor heat exchanger 2. The indoor heat exchanger 2 can be located inside the air inlet 13 of the air conditioner. The crossflow fan 3 can be located on the side of the indoor heat exchanger 2 away from the air inlet 13 of the air conditioner. That is, in the airflow direction in the housing 1, the crossflow fan 3 is located downstream relative to the indoor heat exchanger 2.

[0087] refer to Figure 7 , Figure 8 The wall mounted air conditioner indoor unit 1 may include a driving motor 4. The driving motor 4 is connected to the cross flow fan to drive the cross flow fan to rotate.

[0088] When the wall-mounted air conditioner indoor unit 100 is in operation, under the action of the cross-flow fan 3, the indoor air enters the heat exchange duct in the shell through the air-conditioning air inlet 13, and the indoor air in the heat exchange duct flows through the indoor heat exchanger 2 for heat exchange. The heat exchanged air flows outwardly into the room through the air-conditioning air outlet 14, thereby making the air conditioner cool and heat, playing the role of regulating the indoor temperature to achieve a comfortable temperature for the user.

[0089] refer to Figure 6 In some embodiments of the present application, the housing 1 may include a base 11. The base 11 forms the rear side of the wall-mounted air conditioner indoor unit 100, and the base 11 is suitable for being hung on a wall.

[0090] refer to Figure 5 The housing 1 may include an outer cover 12. The outer cover 12 is disposed on the base 11, and a heat exchange air duct is formed between the outer cover 12 and the base 11.

[0091] The outer cover 12 is roughly in the shape of a rectangular parallelepiped frame. The rear side of the outer cover 12 is open, and the outer cover 12 is arranged on the front side of the base 11 and connected with the base 11 to form the housing 1.

[0092] Continue to refer Figure 5 The air inlet 13 and the air outlet 14 are both provided on the outer cover 12. The indoor heat exchanger 2 and the cross-flow fan are both installed on the base 11.

[0093] In some embodiments of the present application, the outer cover 12 can be provided as an integral body. Of course, in some other embodiments, the outer cover 12 can be provided as a separate body.

[0094] The air conditioner outdoor unit may include an outdoor housing. An outdoor heat exchange air duct may be arranged in the outdoor housing.

[0095] The outdoor housing may include an outdoor air inlet, which may be connected to the outdoor heat exchange air duct, and may be used to introduce outdoor air into the outdoor heat exchange air duct.

[0096] The outdoor housing may include an outdoor air outlet, which may be connected to the outdoor heat exchange air duct, and may be used to lead the air in the outdoor heat exchange air duct out of the outdoor heat exchange air duct.

[0097] The air conditioner outdoor unit may include an outdoor heat exchanger. The outdoor heat exchanger may be arranged in an outdoor heat exchange air duct.

[0098] The air conditioner outdoor unit may include an outdoor fan. The outdoor fan may be arranged in an outdoor heat exchange air duct.

[0099] The rotation of the outdoor fan causes the outdoor air to enter the heat exchange duct from the outdoor air inlet to exchange heat with the outdoor heat exchanger, and the outdoor air after heat exchange flows out of the outdoor heat exchange duct from the outdoor air outlet.

[0100] The air conditioner may include a compressor, which is arranged in an outdoor heat exchange air duct.

[0101] The air conditioner may include a throttling device. The throttling device is used for throttling. The throttling device may be provided in an indoor unit of the air conditioner or an outdoor unit of the air conditioner.

[0102] The air conditioner performs the refrigeration cycle of the air conditioner 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 the air that has been conditioned and heat exchanged.

[0103] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the refrigerant gas in a high-temperature and high-pressure state, and the discharged refrigerant gas flows into the condenser.

[0104] The condenser condenses the compressed refrigerant into liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0105] The throttle device expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant.

[0106] The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low temperature and low pressure state to the compressor.

[0107] The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the whole cycle, the air conditioner can adjust the temperature of the indoor space.

[0108] Of the indoor heat exchanger and the outdoor heat exchanger, one is a condenser and the other is an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0109] refer to Figure 8 The cross-flow fan 3 may include an end cover 31, and the end cover 31 forms one end of the cross-flow fan 3. The end cover 31 is connected to the driving motor 4.

[0110] refer to Fig.10 The cross-flow fan 3 may include a shaft cover 32. The shaft cover 32 forms the other end of the cross-flow fan 3, that is, the shaft cover 32 and the end cover 31 are arranged opposite to each other to form the two ends of the cross-flow fan 3 in the length direction.

[0111] It is understandable that a shaft sleeve is provided on the end cover 31, and the shaft sleeve is suitable for being fixedly connected with the output shaft of the driving motor 4, and the rotation of the output shaft drives the end cover 31 to rotate synchronously. A rotating shaft is provided on the shaft cover 32, and the rotating shaft is suitable for being matched with the bearing assembly.

[0112] The cross-flow fan 3 may include a plurality of wind wheel middle sections 33. The plurality of wind wheel middle sections 33 are sequentially fixedly connected between the end cover 31 and the shaft cover 32.

[0113] The wind wheel middle section 33 may include a middle section end plate, wherein the middle section end plate is in a circular ring shape.

[0114] The wind wheel middle section 33 may include a plurality of blades, which are arranged at intervals along the axial direction of the middle section end plate, wherein the blades may be straight-tooth blades or helical-tooth blades.

[0115] The plurality of wind rotor middle sections 33 may include at least two first wind rotor middle sections 331. The at least two first wind rotor middle sections 331 are connected in sequence.

[0116] The plurality of wind rotor middle sections 33 may include at least two second wind rotor middle sections 332 connected in sequence. Among them, at least two first wind rotor middle sections 331 and at least two second wind rotor middle sections 332 are connected in sequence.

[0117] In some embodiments of the present application, the first wind wheel middle section 331 is disposed closer to the shaft cover 32 relative to the second wind wheel middle section 332. Fig.10 , the first wind wheel middle section 331 is connected to the shaft cover 32. That is to say, at least two first wind wheel middle sections 331 and at least two second wind wheel middle sections 332 are fixedly connected between the shaft cover 32 and the end cover 31 in sequence.

[0118] In some embodiments of the present application, the length of the first wind rotor middle section 331 is less than the length of the second wind rotor middle section 332. The lengths of at least two wind rotor middle sections 33 are both 1.

[0119] In this embodiment, by setting the length of the first wind wheel middle section 331 to be smaller than the length of the second wind wheel middle section 332, the structural strength of the wind wheel middle section at the shaft cover 32 end of the cross-flow fan 3 is enhanced, thereby preventing the shaft cover 32 end of the cross-flow fan 3 from failing when the air-conditioning indoor unit falls, thereby improving the service life and operational reliability of the cross-flow fan 3.

[0120] In some embodiments of the present application, the length of the second wind wheel middle section 332 is l, wherein 65 mm ≤ l, and l ≤ 72 mm.

[0121] The length l of the second wind wheel section 332 cannot be too large. If it is too large, the second wind wheel section 332 will be too long. An overly long second wind wheel section 332 will cause the fan structure to bear greater mechanical stress, resulting in blade breakage or deformation, affecting the life and reliability of the cross-flow fan 3. In order to improve the life and reliability of the cross-flow fan 3, the length l of the second wind wheel section 332 is set to be no greater than the first parameter value. The first parameter value can be any value between 70mm and 72mm. The first parameter value can be 72mm, which can prevent the second wind wheel section 332 from being too large and affecting the structural strength of the second wind wheel section.

[0122] The length l of the second wind wheel section 332 cannot be too small. If it is too small, the second wind wheel section 332 and the first wind wheel section 331 will be too small, affecting the air volume output of the entire cross-flow fan 3 and reducing the efficiency of the cross-flow fan 3. In order to avoid the effect of the output air volume caused by the length of the first wind wheel section 331 and the second wind wheel section 332 being too small, the length l of the second wind wheel section 332 is set to be not less than the second parameter value. The second parameter value can be any value between 65mm and 67mm. Consider selecting a suitable and specific parameter in the specific design. For example, the second parameter value can be 65mm.

[0123] In some embodiments of the present application, the length of the second wind wheel middle section 332 is l, wherein 65 mm ≤ l ≤ 72 mm.

[0124] In this embodiment, the length of at least two second wind wheel sections 332 is set to l, and l is set to any value in the range of 65mm to 72mm to avoid the problem of blade breakage caused by the length of the wind wheel section 33 being too long. On the basis of ensuring the structural strength of the wind wheel section 33, the output air volume of the cross-flow fan 3 is increased.

[0125] In some embodiments of the present application, the length of the first wind wheel section 331 is not less than 1 / 2.

[0126] The length of the first wind wheel middle section 331 cannot be too small, otherwise it will be too short, which will cause serious wind volume attenuation. To avoid serious wind volume attenuation, in this embodiment, the length of the first wind wheel middle section 331 is set to be no less than the second parameter value.

[0127] The second parameter value may be 1 / 2, that is, the second parameter value may be any value between 32.5 mm and 36 mm. When designing specifically, consider selecting a suitable and specific parameter. For example, the second parameter value may be 32.5 mm, which can prevent the first wind wheel middle section 331 from being too small, thereby ensuring the output air volume of the cross-flow fan 3.

[0128] Furthermore, at least two first wind wheel middle sections 331 are of equal or unequal lengths. The first wind wheel middle sections 331 of equal lengths are convenient for manufacturing and assembly, and reduce changes and adjustments on the production line; the first wind wheel middle sections 331 of unequal lengths can be adjusted in length as needed, and the airflow distribution can be flexibly adjusted to meet certain specific needs. The first wind wheel middle sections 331 of equal or unequal lengths can be selected according to the actual design.

[0129] In the related art, a conventional cross-flow fan 3 generally includes a plurality of rotor sections 33 of equal length, wherein the length of the conventional cross-flow fan 3 is defined as L, the number of the rotor sections 33 is configured as n0, and the lengths of the n0 rotor sections 33 are all l. That is to say, the conventional cross-flow fan 3 is composed of n0 completely identical rotor sections 33, and the centrifugal forces on different rotor sections 33 are not completely the same in actual operation, so some weak positions, such as the end of the shaft cover 32, are at risk of failure.

[0130] In some embodiments of the present application, without changing the length L of the cross-flow fan 3, the lengths of n1 wind wheel sections among the n0 wind wheel sections of the conventional cross-flow fan 3 are changed, and the n1 wind wheel sections with changed lengths are arranged closer to the shaft cover 32 relative to the other wind wheel sections.

[0131] Specifically, in this embodiment, the length of the cross-flow fan 3 is defined as L. Among them, the second wind wheel middle section 332 is configured with n0-n1 pieces, the first wind wheel middle section 331 is configured with n1+△ pieces, and the length of the first wind wheel middle section 331 is configured as

[0132] in, n1≥1, △≤n1, n0, △, n1 are positive integers.

[0133] In this embodiment, without changing the length L of the cross-flow fan 3, the number and length of the first wind wheel sections 331 are reasonably adjusted to avoid adding too many wind wheel sections 33, which will increase the number of section end plates and thus avoid serious air volume loss.

[0134] It can be understood that there are at least two second wind wheel middle sections 332, n1≥1, and △ and are positive integers, so n0 is configured to be no less than 3.

[0135] For example, taking n0=8 as an example, Therefore, n1 can take the values ​​1, 2, and 3.

[0136] When n1 is 1, △ is 1. At this time, the length of the first wind wheel middle section 331 is configured as That is, the length of one of the eight wind wheel middle sections 33 of the conventional cross-flow fan 3 is changed, and the length of one wind wheel middle section is changed to Therefore, refer to Fig.13 , the number of wind wheel nodes 33 becomes 9.

[0137] When n1 is 2, △ is 1 or 2. At this time, the length of the first wind wheel middle section 331 is configured as or That is, the lengths of two of the eight wind wheel sections of the conventional cross-flow fan 3 are changed, and the two wind wheel sections are changed to have a length of The 4 wind wheel middle sections or the length of Therefore, refer to Fig.14 , Fig.15 , the number of wind wheel sections becomes 9 or 10.

[0138] When n1 is 3, △ is 1, 2 or 3. At this time, the length of the first wind wheel middle section 331 is configured as or That is, the lengths of three of the eight wind wheel sections of the conventional cross-flow fan 3 are changed, and the three wind wheel sections are changed to have a length of The 4 wind wheel middle sections or the length of 5 wind wheel middle sections, or become a length of Therefore, refer to Fig.16 , Fig.17 , Fig.18 , the number of wind rotor sections becomes 9, 10 or 11.

[0139] In some other embodiments, the first wind wheel middle section 331 is closer to the middle position of the cross-flow fan 3 in the length direction relative to the second wind wheel middle section 332. Fig.12 , Fig.19 , Fig. 20 , the first wind wheel middle section 331 is located between at least two second wind wheel middle sections 332. That is to say, the wind wheel middle section fixedly connected to the shaft cover 32 and the end cover 31 is the second wind wheel middle section 332.

[0140] The wall-mounted air-conditioning indoor unit provided in the present embodiment reduces the deformation deflection of the middle position of the cross-flow fan 3 by setting the length of at least two first wind wheel middle sections 331 close to the middle position to be smaller than the length of the remaining wind wheel middle sections, i.e., the second wind wheel middle section 332, thereby avoiding large flexural deformation of the cross-flow fan 3 under the action of gravity, causing deterioration of the air-conditioning sound quality, and reducing the risk of collision of the cross-flow fan 3 during transportation; at the same time, the length of the second wind wheel middle section 332 is set within a reasonable range to avoid air volume attenuation to a certain extent.

[0141] In some embodiments of the present application, the length of the cross-flow fan 3 is defined as L, the number of the second wind wheel sections 332 is n0-n1, and the number of the first wind wheel sections 331 is n1+△. n1≥1, △≤n1, n0, △, n1 are positive integers.

[0142] The length of the second wind wheel middle section 332 is not less than 1 / 2, and the lengths of adjacent first wind wheel middle sections 331 are not equal.

[0143] In this embodiment, without changing the length L of the cross-flow fan 3, the number and length of the first wind wheel sections 331 are reasonably adjusted to avoid serious air volume loss; at the same time, the lengths of the first wind wheel sections 331 are not equal, which can specifically enhance the strength of local wind wheel sections and blades, avoid the risk of failure at weak locations, and improve design flexibility.

[0144] In some other embodiments, the cross-flow fan 3 may include a plurality of wind wheel sections. The plurality of wind wheel sections are sequentially fixedly connected between the end cover 31 and the shaft cover 32. The lengths of the plurality of wind wheel sections decrease in the direction from the end cover 31 to the shaft cover 32.

[0145] In the wall-mounted air conditioner indoor unit provided in this embodiment, the lengths of the middle sections of the multiple wind wheels of the cross-flow fan 3 are arranged to show a decreasing trend in the direction from the end cover 31 to the shaft cover 32, so that the length of the middle section of the wind wheel on the side of the shaft cover 32 is relatively small, thereby enhancing the structural strength of the end of the shaft cover 32 of the cross-flow fan 3, and preventing the end of the shaft cover 32 from failing when falling;

[0146] In some embodiments of the present application, the length of the plurality of wind rotor middle sections 33 is not less than 1 / 2, and the length of the wind rotor middle section 33 does not exceed 1. Wherein, 65mm≤1. 1≤72mm.

[0147] The length of the wind wheel section 33 cannot be too large, otherwise the wind wheel section 33 will be too long. An overly long wind wheel section 33 will cause the cross-flow fan 3 structure to bear greater mechanical stress, causing blade breakage or deformation, affecting the life and reliability of the cross-flow fan 3.

[0148] In order to improve the life and reliability of the cross-flow fan 3, the length of the wind wheel middle section 33 is set to be no greater than the third parameter value. The third parameter value can be any value between 65 mm and 72 mm. Consider selecting a suitable and specific parameter in the specific design. For example, the third parameter value can be 72 mm, that is, l≤72 mm, which ensures the structural strength of the wind wheel middle section 33.

[0149] The length l of the wind wheel middle section 33 cannot be too small. If it is too small, the air volume output of the crossflow fan 3 will be seriously affected, and the efficiency of the crossflow fan 3 will be reduced. In order to avoid serious attenuation of the air volume output by the crossflow fan 3, the length of the wind wheel middle section 33 is set to be not less than the fourth parameter value. The fourth parameter value can be l / 2, that is, any value between 32.5mm and 36mm. Consider selecting a suitable and specific parameter in the specific design. For example, the fourth parameter value can be 32.5mm.

[0150] In some embodiments of the present application, the length of the wind rotor middle section 33 connected to the end cover 31 is l. That is, the length of the longest wind rotor middle section 33 among the plurality of wind rotor middle sections 33 is l.

[0151] In some embodiments of the present application, the lengths of the plurality of wind wheel middle sections 33 are arranged in an arithmetic progression. That is, the lengths of the plurality of wind wheel middle sections 33 gradually decrease in an arithmetic progression in the direction from the end cover 31 to the shaft cover 32, that is, they are distributed in a decreasing arithmetic progression.

[0152] By setting the lengths of the plurality of wind wheel sections 33 to be arranged in an arithmetic progression, the amount of airflow generated by each wind wheel section 33 will gradually change. This progressive airflow distribution helps to avoid excessive or weak airflow in certain areas, ensuring that the airflow output by the entire cross-flow fan 3 is more uniform.

[0153] In some embodiments of the present application, the difference between the lengths of two adjacent wind wheel sections 33 is b. 1 mm ≤ b. b ≤ 2.5 mm.

[0154] The difference b cannot be too large. If it is too large, when the number of wind wheel sections 33 is large, it cannot be guaranteed that the length of the longest wind wheel section 33 does not exceed l. At the same time, if the length difference b of two adjacent wind wheel sections 33 is too large, the generated airflow will be uneven, affecting the efficiency of the cross-flow fan 3. In order not to reduce the efficiency of the cross-flow fan 3, the difference b is set to be no greater than the fifth parameter value. The fifth parameter value can be any value between 2mm and 2.5mm. Consider selecting a suitable and specific parameter in the specific design. For example, the fifth parameter value can be 2.5mm.

[0155] The difference b cannot be too small. If it is too small, the flexibility of the design of the cross-flow fan 3 is limited, which may not be conducive to achieving certain special airflow control requirements. In order to improve the flexibility of the design of the cross-flow fan 3, the length of the wind wheel section 33 is set to be no less than the sixth parameter value. The sixth parameter value can be any value between 1mm and 1.5mm. Consider selecting a suitable and specific parameter in the specific design. For example, the fourth parameter value can be 1mm.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

[0157] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A wall mounted air conditioner indoor unit, characterized in that: include: The housing has an air-conditioning air inlet and an air-conditioning air outlet on the top and the front bottom, respectively; An indoor heat exchanger is disposed in the shell and is used to perform heat exchange on the air in the shell; A cross-flow fan is arranged in the housing and below the indoor heat exchanger; indoor airflow enters the housing through the air inlet of the air conditioner under the action of the cross-flow fan, and is output to the room through the air outlet of the air conditioner after heat exchange in the indoor heat exchanger; A driving motor connected to the cross-flow fan to drive the cross-flow fan to rotate; The cross-flow fan comprises: an end cover, forming one end of the crossflow fan and connected to the drive motor; A shaft cover, forming the other end of the cross-flow fan; A plurality of wind wheel middle sections are fixedly connected in sequence between the end cover and the shaft cover; The plurality of wind rotor middle sections include at least two first wind rotor middle sections and at least two second wind rotor middle sections connected in sequence; Among them, the first wind wheel middle section is closer to the shaft cover than the second wind wheel middle section, the length of the first wind wheel middle section is smaller than the length of the second wind wheel middle section, and the length of the second wind wheel middle section is l, 65mm≤l, l≤72mm.

2. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that: Define the length of the cross-flow fan as L, the number of the second wind wheel sections is n0-n1, the number of the first wind wheel sections is n1+Δ, and the length of the first wind wheel section is in, n1≥1Δ≤n1, n0 and Δ are positive integers.

3. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that: The length of the cross-flow fan is defined as L, the number of the second wind wheel sections is n0-n1, the number of the first wind wheel sections is n1+Δ, the length of the second wind wheel sections is not less than 1 / 2, and the lengths of adjacent first wind wheel sections are not equal; wherein, n1≥1Δ≤n1, n0 and Δ are positive integers.

4. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that: The length of the first wind wheel middle section is not less than 1 / 2, and the lengths of at least two of the first wind wheel middle sections are equal or unequal.

5. A wall mounted air conditioner indoor unit, characterized in that: include: The housing has an air-conditioning air inlet and an air-conditioning air outlet on the top and the front bottom, respectively; An indoor heat exchanger is disposed in the shell and is used to perform heat exchange on the air in the shell; A cross-flow fan is arranged in the housing and below the indoor heat exchanger; indoor airflow enters the housing through the air inlet of the air conditioner under the action of the cross-flow fan, and is output to the room through the air outlet of the air conditioner after heat exchange in the indoor heat exchanger; A driving motor connected to the cross-flow fan to drive the cross-flow fan to rotate; The cross-flow fan comprises: an end cover, forming one end of the crossflow fan and connected to the drive motor; A shaft cover, forming the other end of the cross-flow fan; A plurality of wind wheel middle sections are fixedly connected in sequence between the end cover and the shaft cover; The plurality of wind rotor middle sections include at least two first wind rotor middle sections and at least two second wind rotor middle sections; Among them, the first wind wheel middle section is close to the middle position of the cross-flow fan relative to the second wind wheel middle section, the length of the first wind wheel middle section is smaller than the length of the second wind wheel middle section, and the length of the second wind wheel middle section is l, 65mm≤l, l≤72mm.

6. A wall mounted air conditioner indoor unit, characterized in that: include: The housing has an air-conditioning air inlet and an air-conditioning air outlet on the top and the front bottom, respectively; An indoor heat exchanger is disposed in the shell and is used to perform heat exchange on the air in the shell; A cross-flow fan is arranged in the housing and below the indoor heat exchanger; indoor airflow enters the housing through the air inlet of the air conditioner under the action of the cross-flow fan, and is output to the room through the air outlet of the air conditioner after heat exchange in the indoor heat exchanger; A driving motor connected to the cross-flow fan to drive the cross-flow fan to rotate; The cross-flow fan comprises: an end cover, forming one end of the crossflow fan and connected to the drive motor; A shaft cover, forming the other end of the cross-flow fan; A plurality of wind wheel middle sections are fixedly connected in sequence between the end cover and the shaft cover; Among them, the lengths of the plurality of wind wheel middle sections show a decreasing trend in the direction from the end cover to the shaft cover, and the length of the wind wheel middle section is not less than 1 / 2; among them, 65mm≤1, l≤72mm.

7. The wall-mounted air conditioner indoor unit according to claim 6, characterized in that: The lengths of the plurality of wind wheel sections are arranged in an arithmetic progression.

8. The wall-mounted air conditioner indoor unit according to claim 6, characterized in that: The length of the wind wheel middle section connected to the end cover is l.

9. The wall-mounted air conditioner indoor unit according to any one of claims 6 to 8, characterized in that: The difference between the lengths of two adjacent wind wheel sections is b, 1mm≤b, b≤2.5mm.

10. The wall-mounted air conditioner indoor unit according to claim 6, characterized in that: The length of the wind wheel middle section does not exceed l.

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