Air duct rotating mechanism, indoor unit and air conditioner

Abstract

This invention provides a duct rotation mechanism, an indoor unit, and an air conditioner. The duct rotation mechanism includes: a fan, which includes a fan blade and a fan housing, both of which are rotatably configured to deliver air and change the air outlet angle; two bearing assemblies, which are respectively disposed on opposite sides of the fan along the axial direction of the fan and fixed to the body of the indoor unit of the air conditioner. Each bearing assembly includes a housing bearing for connecting to and supporting the fan housing; wherein the housing bearing includes a sleeve portion for engaging with the housing shaft of the fan housing and a stop portion disposed at the end of the sleeve portion away from the fan housing to stop the axial movement of the fan housing, thereby solving the problem of axial movement of the fan housing in existing air conditioners.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air duct rotating mechanism, an indoor unit and an air conditioner. Background Art

[0002] When the existing wall-mounted air conditioner is working, the upper and lower air outlet directions and angles of the air conditioner are adjusted by the up and down swinging of the air guide plate. However, the air guide plate of the wall-mounted air conditioner has some problems: for example, the upper and lower air supply angles are limited, resulting in poor comfort, and the upper and lower sweeping angles of the air guide plate are small and cannot meet the user's usage requirements.

[0003] In order to solve the above problems, an air conditioner indoor unit is proposed, wherein the fan housing of the air conditioner indoor unit can rotate to realize large-angle rotation and air supply.

[0004] However, when designing an air conditioner in which the fan housing can rotate to supply air, the problem of axial movement of the fan housing needs to be solved. The axial movement of the fan housing needs to be restricted to maintain the stability of the rotating mechanism. Summary of the invention

[0005] The main purpose of the present invention is to provide an air duct rotating mechanism, an indoor unit and an air conditioner to solve the problem of axial movement of the fan housing of the air conditioner in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, there is provided an air duct rotation mechanism, comprising: a fan, the fan comprising fan blades and a fan housing, the fan blades and the fan housing both being rotatably arranged to supply air and change the air outlet angle; two bearing assemblies, which are respectively arranged on opposite sides of the fan along the axial direction of the fan and fixed to the body of the indoor unit of the air conditioner, and the two bearing assemblies each comprise a housing bearing for connecting to the fan housing to support it; wherein the housing bearing comprises a sleeve portion for mutually sleeved with a housing rotating shaft of the fan housing and a stop portion arranged at one end of the sleeve portion away from the fan housing to stop the axial movement of the fan housing.

[0007] Furthermore, the air duct rotation mechanism includes a transmission structure for transmission connection with the fan casing; along the axial direction of the fan, the axial distance between the stop parts of the casing bearings of the two bearing assemblies is L1; the total axial length of the fan casing is L2; ​​the axial disengagement dimension of the transmission structure is L3; the allowable axial movement dimension of the fan casing is μ; wherein, μ=L1-L2, 0<μ<L3.

[0008] Furthermore, 0<μ<1 / 3L3.

[0009] Furthermore, at least one of the two bearing assemblies includes: a bearing seat for fixing on the body of the indoor unit of the air conditioner; wherein the housing bearing is arranged on the bearing seat, and the bearing seat includes a first mounting section for mounting the housing bearing.

[0010] Furthermore, at least one of the two bearing assemblies also includes: a fan blade bearing, which is used to be mounted on the fan blade shaft of the fan blade to support the fan blade; wherein the fan blade bearing is arranged on the bearing seat and the axis of the fan blade shaft, the axis of the shell shaft, the axis of the fan blade bearing and the axis of the shell bearing are collinear.

[0011] Furthermore, the bearing seat is a hollow cylindrical structure; wherein the fan blade bearing and the housing bearing are both arranged on the inner side of the bearing seat, the fan blade bearing is located on the side of the housing bearing away from the fan housing, and the stop portion is provided with an axial hole for the fan blade shaft to pass through; or the fan blade bearing is arranged on the inner side of the bearing seat, and the housing bearing is arranged on the outer side of the bearing seat; or the fan blade bearing and the housing bearing are both arranged on the outer side of the bearing seat, and the fan blade bearing is located on the side of the housing bearing close to the fan housing.

[0012] Furthermore, a bearing sleeve is sandwiched between the fan blade bearing and the bearing seat; the bearing seat includes a second mounting section for installing the bearing sleeve, and the second mounting section is provided with a bearing sleeve limiting portion for limiting the axial movement of the bearing sleeve; the bearing sleeve is provided with a limiting groove that cooperates with the bearing sleeve limiting portion, and the bearing sleeve limiting portion and the limiting groove are used together to limit the bearing sleeve.

[0013] Furthermore, at least one of the two bearing assemblies includes: a fan blade bearing, which is used to be mutually sleeved with the fan blade shaft of the fan blade to support the fan blade; wherein, the housing bearing is used to be fixed on the body of the indoor unit of the air conditioner, the housing shaft is rotatably arranged relative to the housing bearing, and the fan blade bearing is arranged on the housing bearing.

[0014] Furthermore, the axis of the fan blade bearing, the axis of the fan blade shaft and the axis of the housing shaft are collinear; the housing bearing comprises a mounting portion for mounting the fan blade bearing, and the mounting portion is located on a side of the stop portion away from the sleeve portion.

[0015] Furthermore, the sleeve portion and the shell shaft are both hollow cylindrical structures, wherein the shell shaft is sleeved on the outer circumferential surface of the sleeve portion, and the stop portion is an annular plate body arranged around the outer circumferential surface of the sleeve portion; or the sleeve portion is sleeved on the outer circumferential surface of the shell shaft, and the stop portion is an annular plate body arranged around the inner wall surface of the sleeve portion.

[0016] Furthermore, the air duct rotation mechanism also includes: a first motor, which is arranged at one end of one of the bearing assemblies away from the fan, so as to be driven and connected to the fan blades to drive the fan blades to rotate; and / or a second motor, which is driven and connected to the fan casing through a transmission structure to drive the fan casing to rotate.

[0017] Furthermore, the first motor shaft of the first motor extends into the fan housing to be connected to the blade body of the fan blade; wherein, a through hole for the first motor shaft to pass through is provided on the bearing assembly close to the first motor and the housing shaft of the fan housing.

[0018] Furthermore, the diameter of the fan blade shaft of the fan blade is D1, and the inner diameter of the sleeve portion is D2, wherein D2>D1.

[0019] Furthermore, 7D1≥D2>D1.

[0020] According to a second aspect of the present invention, an indoor unit is provided, comprising an air duct rotation mechanism, wherein the air duct rotation mechanism is the above-mentioned air duct rotation mechanism.

[0021] According to a third aspect of the present invention, there is provided an air conditioner, comprising an indoor unit, wherein the indoor unit is the indoor unit described above.

[0022] The technical solution of the present invention is applied, and the air duct rotating mechanism of the present invention includes a fan and two bearing assemblies, and the fan includes a fan blade and a fan housing, and the fan blade and the fan housing can rotate independently of each other, so that the fan housing replaces the air guide plate of the indoor unit of the air conditioner in the prior art to realize the upward and downward air supply of the indoor unit of the wall-mounted air conditioner or the left and right air supply of the indoor unit of the cabinet air conditioner, thereby increasing the air outlet volume and wind sweeping angle of the indoor unit, improving the overall performance of the air conditioner, and meeting the comfort requirements of users; the two bearing assemblies are respectively arranged on opposite sides of the fan along the axial direction of the fan and fixed to the air On the body of the indoor unit of the air conditioner, two bearing assemblies each include a shell bearing for connecting to the fan casing to support it; wherein the shell bearing includes a sleeve portion for mutually sleeved with the casing rotating shaft of the fan casing and a stop portion arranged at an end of the sleeve portion away from the fan casing to stop the axial movement of the fan casing, so as to limit the axial movement of the fan casing, reduce the influence of the axial movement of the fan casing during the rotation process on the fan performance, thereby ensuring the stability and reliability of the air duct rotation mechanism, and solving the problem of axial movement of the fan casing of the air conditioner in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A half-section view of a first embodiment of an air duct rotating mechanism according to the present invention is shown;

[0025] Figure 2 Shows Figure 1An exploded view of the first bearing assembly of the air duct rotating mechanism shown;

[0026] Figure 3 Shows Figure 2 A half-section view of the first bearing assembly of the air duct rotating mechanism shown;

[0027] Figure 4 Shows Figure 1 An exploded view of the second bearing assembly of the air duct rotating mechanism shown;

[0028] Figure 5 Shows Figure 4 A half-section view of the second bearing assembly of the air duct rotating mechanism shown;

[0029] Figure 6 A half-section view of a second embodiment of the air duct rotating mechanism according to the present invention is shown;

[0030] Figure 7 A half-section view of a third embodiment of the air duct rotating mechanism according to the present invention is shown;

[0031] Figure 8 A half-section view of a fourth embodiment of the air duct rotating mechanism according to the present invention is shown;

[0032] Fig. 9 Shows Figure 8 An exploded view of the first bearing assembly of the air duct rotating mechanism shown;

[0033] Fig.10 A half-sectional view showing a fifth embodiment of the air duct rotating mechanism according to the present invention; and

[0034] Fig.11 A half-sectional view of a sixth embodiment of the air duct rotating mechanism according to the present invention is shown.

[0035] The above drawings include the following reference numerals:

[0036] 1. fan; 11. fan blade; 111. blade body; 112. fan blade shaft; 12. fan housing; 121. housing body; 122. housing shaft;

[0037] 2. Bearing assembly; 2001. First bearing assembly; 2002. Second bearing assembly; 20. Bearing seat; 201. First mounting section; 202. Second mounting section; 203. Bearing sleeve limiting part; 21. Fan blade bearing; 22. Shell bearing; 220. Through-shaft hole; 221. Sleeve connection part; 222. Stopper; 223. Mounting part; 23. Bearing sleeve;

[0038] 3. Transmission structure; 4. First motor; 41. First motor shaft; 5. Second motor. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] like Figures 1 to 11 As shown, the present invention provides an air duct rotation mechanism, comprising: a fan 1, the fan 1 comprising a fan blade 11 and a fan housing 12, the fan blade 11 and the fan housing 12 are both rotatably arranged for supplying air and changing the air outlet angle; two bearing assemblies 2, which are respectively arranged on opposite sides of the fan 1 along the axial direction of the fan 1 and fixed on the body of the indoor unit of the air conditioner, and the two bearing assemblies 2 each include a housing bearing 22 for connecting with the fan housing 12 to support it; wherein the housing bearing 22 includes a sleeve connection portion 221 for mutually sleeved with a housing rotating shaft 122 of the fan housing 12 and a stop portion 222 arranged at one end of the sleeve connection portion 221 away from the fan housing 12 to stop the axial movement of the fan housing 12.

[0041] The air duct rotating mechanism of the present invention comprises a fan 1 and two bearing assemblies 2. The fan 1 comprises a fan blade 11 and a fan housing 12. The fan blade 11 and the fan housing 12 can rotate independently of each other, so that the fan housing 12 replaces the air guide plate of the indoor unit of the air conditioner in the prior art to realize the upward and downward air supply of the indoor unit of the wall-mounted air conditioner or the left and right air supply of the indoor unit of the cabinet air conditioner, thereby increasing the air flow and wind sweeping angle of the indoor unit, improving the overall performance of the air conditioner, and meeting the comfort requirements of the user; the two bearing assemblies 2 are respectively arranged on opposite sides of the fan 1 along the axial direction of the fan 1 and fixed on the body of the indoor unit of the air conditioner. Both bearing assemblies 2 include a housing bearing 22 for connecting to the fan housing 12 to support it; wherein the housing bearing 22 includes a sleeve portion 221 for sleeve-engaging with the housing shaft 122 of the fan housing 12 and a stop portion 222 arranged at an end of the sleeve portion 221 away from the fan housing 12 to stop the axial movement of the fan housing 12, so as to limit the axial movement of the fan housing, reduce the influence of the axial movement of the fan housing 12 during the rotation process on the fan performance, thereby ensuring the stability and reliability of the air duct rotation mechanism, and solving the problem of axial movement of the fan housing of the air conditioner in the prior art.

[0042] like Figure 1As shown, the air duct rotation mechanism of the present invention includes a transmission structure 3 for transmission connection with the fan housing 12; when the two bearing assemblies 2 are fixed to the indoor unit body of the air conditioner by buckles or fasteners, and the air duct rotation mechanism is assembled, along the axial direction of the fan 1, the axial distance between the stopper 222 of the housing bearing 22 of the two bearing assemblies 2 is L1; the total axial length of the fan housing 12 is L2; ​​the axial disengagement dimension of the transmission structure 3 is L3; the axial movement dimension allowed by the fan housing 12 is μ; wherein, μ=L1-L2, 0<μ<L3.

[0043] Preferably, 0<μ<1 / 3L3.

[0044] Specifically, when the transmission structure 3 is a gear assembly, the axial disengagement dimension of the transmission structure 3 refers to the meshing tooth width between two meshing gears. When the axial movement dimension of the fan housing 12 is greater than or equal to the meshing tooth width, the two meshing gears will be completely separated and unable to transmit power; when the transmission structure 3 is a crank rocker assembly, the axial disengagement dimension of the transmission structure 3 refers to the length of the connecting piece between two interconnected parts. When the axial movement dimension of the fan housing 12 is greater than or equal to the length of the connecting piece, the two interconnected parts will be completely separated and unable to transmit power.

[0045] The allowable axial movement dimension μ of the fan housing 12 refers to a value that will not cause an adverse effect on the rotation of the fan housing 12 when the axial movement dimension of the fan housing 12 is less than or equal to μ.

[0046] The air duct rotation mechanism of the present invention also includes: a first motor 4, which is arranged at one end of one of the bearing assemblies 2 away from the fan 1, so as to be driven and connected to the fan blades 11 to drive the fan blades 11 to rotate so as to provide air volume; and / or a second motor 5, which is arranged on one side of the fan housing 12 and is driven and connected to the fan housing 12 through a transmission structure 3 to drive the fan housing 12 to rotate, and is used for upward and downward air supply or left and right air supply of the indoor unit.

[0047] In the present invention Figure 1 In the illustrated embodiment, the first motor shaft 41 of the first motor 4 extends into the fan housing 12 to be directly connected to the blade body 111 of the fan blade 11; wherein, the bearing assembly 2 on the side close to the first motor 4 and the housing shaft 122 of the fan housing 12 on the side close to the first motor 4 are both provided with a through hole for the first motor shaft 41 to pass through.

[0048] In the present invention Figures 1 to 7In the three embodiments shown, at least one of the two bearing assemblies 2 includes: a bearing seat 20 for fixing on the body of the indoor unit of the air conditioner; wherein the housing bearing 22 is arranged on the bearing seat 20, and the bearing seat 20 includes a first mounting section 201 for mounting the housing bearing 22.

[0049] Specifically, at least one of the two bearing assemblies 2 also includes: a blade bearing 21, which is used to be mounted on the blade shaft 112 of the blade 11 to support the blade 11; wherein, the blade bearing 21 is arranged on the bearing seat 20. During the rotation of the fan casing 12, in order to keep the gap between the fan 11 and the fan casing 12 unchanged at all times, so as to ensure that there is no adverse effect on the working performance of the fan and to make the fan structure reliable, the axis of the blade shaft 112, the axis of the casing shaft 122, the axis of the blade bearing 21 and the axis of the casing bearing 22 must be collinear.

[0050] Optionally, the bearing seat 20 is a hollow cylindrical structure; wherein, as 1 to Figure 5 As shown, the fan blade bearing 21 and the housing bearing 22 are both arranged on the inner side of the bearing seat 20 (that is, the bearing seat 20 is sleeved on the fan blade bearing 21 and the housing bearing 22), the fan blade bearing 21 is sleeved on the fan blade shaft 112, and the housing bearing 22 is sleeved on the housing shaft 122. The fan blade bearing 21 is located on the side of the housing bearing 22 away from the fan housing 12, and the stopper 222 is provided with an axial hole 220 for the fan blade shaft 112 to pass through; or, as Figure 6 As shown, the fan blade bearing 21 is arranged on the inner side of the bearing seat 20 (that is, the bearing seat 20 is sleeved on the fan blade bearing 21), the housing bearing 22 is arranged on the outer side of the bearing seat 20 (that is, the housing bearing 22 is sleeved on the bearing seat 20), the fan blade bearing 21 is sleeved on the fan blade shaft 112, and the housing shaft 122 is sleeved on the housing bearing 22; or, as Figure 7 As shown, the fan blade bearing 21 and the housing bearing 22 are both arranged on the outside of the bearing seat 20 (that is, the fan blade bearing 21 and the housing bearing 22 are both sleeved on the bearing seat 20), the fan blade shaft 112 is sleeved on the fan blade bearing 21, and the housing shaft 122 is sleeved on the housing bearing 22. The fan blade bearing 21 is located on the side of the housing bearing 22 close to the fan housing 12.

[0051] In this embodiment, a bearing sleeve 23 is further sandwiched between the fan blade bearing 21 and the bearing seat 20; the bearing seat 20 includes a second mounting section 202 for mounting the bearing sleeve 23, and the second mounting section 202 is provided with a bearing sleeve limiting portion 203 for limiting the axial movement of the bearing sleeve 23; the bearing sleeve 23 is provided with a limiting groove that cooperates with the bearing sleeve limiting portion 203, and the bearing sleeve limiting portion 203 and the limiting groove are used together to limit the bearing sleeve 23.

[0052] like Figures 1 to 5As shown, one of the implementation schemes of the first embodiment is as follows:

[0053] The fan blade 11 includes a blade body 111 and a fan blade shaft 112 arranged on one side of the blade body 111, so as to be connected to one of the bearing assemblies 2. The fan housing 12 includes a housing body 121 and two housing shafts 122 arranged on opposite sides of the housing body 121, so as to be respectively connected to the two bearing assemblies 2. The two bearing assemblies 2 include a first bearing assembly 2001 and a second bearing assembly 2002.

[0054] like Figures 1 to 3 As shown, the first bearing assembly 2001 includes a bearing seat 20 and a blade bearing 21, a shell bearing 22 and a bearing sleeve 23 arranged in the bearing seat 20, the bearing sleeve 23 is clamped between the blade bearing 21 and the bearing seat 20, the blade bearing 21 is located on the side of the shell bearing 22 away from the shell body 121 of the fan housing 12, and the shell bearing 22 is a hollow cylindrical structure for the blade shaft 112 to pass through; wherein, the blade bearing 21 is connected to the blade shaft 112 of the fan 11 to support the rotation of the fan 11, and the shell bearing 22 is connected to a shell shaft 122 of the fan housing 12 to support the rotation of the fan housing 12.

[0055] As Figure 1 , Figure 4 and Figure 5 As shown, the second bearing assembly 2002 only includes a bearing seat 20 and a shell bearing 22 arranged in the bearing seat 20, the first motor 4 is arranged on the side of the fan 1 close to the second bearing assembly 2002 and is located on the side of the second bearing assembly 2002 away from the shell body 121 of the fan housing 12, and the first motor shaft 41 of the first motor 4 passes through the through holes on the bearing seat 20, the shell bearing 22 and the corresponding shell shaft 122 and enters the shell body 121 and is connected to the blade body 111 to drive the fan blade to rotate; the second motor 5 is also located on the side of the fan 1 close to the second bearing assembly 2002 and is connected to the shell shaft 122 there through the transmission structure 3 to drive the fan housing 12 to rotate.

[0056] The fan blade bearing 21 and the housing bearing 22 are made of lubricating material, or the surfaces of the fan blade bearing 21 and the housing bearing 22 are coated with lubricant.

[0057] In the present invention Figures 8 to 11 In the three embodiments shown, at least one of the two bearing assemblies 2 includes: a fan blade bearing 21, which is used to be mutually sleeved with the fan blade shaft 112 of the fan blade 11 to support the fan blade 11; wherein, the housing bearing 22 is used to be fixed on the body of the indoor unit of the air conditioner, the housing shaft 122 is rotatably arranged relative to the housing bearing 22, and the fan blade bearing 21 is arranged on the housing bearing 22.

[0058] In this way, the above-mentioned bearing seat 20 and shell bearing 22 are combined into one part to form the shell bearing 22 of the second embodiment, which can simplify the processing steps of the bearing assembly and improve the production efficiency of the bearing assembly; wherein, the shell bearing 22 and the shell shaft 122 are made of lubricating material, or a lubricant is coated between the shell bearing 22 and the shell shaft 122, so that the shell shaft 122 can be rotatably arranged relative to the shell bearing 22.

[0059] During the rotation of the fan casing 12, in order to keep the gap between the fan blades 11 and the fan casing 12 unchanged at all times to ensure that there is no adverse effect on the working performance of the fan and that the fan structure is reliable, the axis of the fan blade bearing 21, the axis of the fan blade shaft 112 and the axis of the casing shaft 122 must be collinear.

[0060] like Figure 8 and Fig. 9 As shown, the housing bearing 22 includes a mounting portion 223 for mounting the fan blade bearing 21 , and the mounting portion 223 is located at a side of the stop portion 222 away from the sleeve portion 221 .

[0061] Optionally, the housing bearing 22 is a hollow cylindrical structure; Figure 8 and Fig. 9 As shown, the fan blade bearing 21 is arranged on the inner side of the housing bearing 22 (that is, the housing bearing 22 is sleeved on the fan blade bearing 21), the fan blade bearing 21 is arranged on the side of the housing shaft 122 away from the housing body 121 of the fan housing 12, the fan blade bearing 21 is sleeved on the fan blade shaft 112, the housing bearing 22 is sleeved on the housing shaft 122, and the stopper 222 is provided with a through-shaft hole 220 for the fan blade shaft 112 to pass through; or, as Fig.10 As shown, the fan blade bearing 21 is arranged on the inner side of the housing bearing 22 (that is, the housing bearing 22 is sleeved on the fan blade bearing 21), the fan blade bearing 21 is sleeved on the fan blade shaft 112, and the housing shaft 122 is sleeved on the housing bearing 22; or, as Fig.11 As shown, the fan blade bearing 21 is arranged on the outside of the shell bearing 22 (that is, the shell bearing 22 is sleeved on the fan blade bearing 21), the shell shaft 122 is sleeved outside the shell bearing 22, and the connection between the shell shaft 122 and the shell bearing 22 is located on the side of the fan blade bearing 21 away from the fan housing 12.

[0062] Preferably, in this embodiment, a bearing sleeve 23 is sandwiched between the fan blade bearing 21 and the housing bearing 22; a bearing sleeve limiting portion 203 for limiting the axial movement of the bearing sleeve 23 is provided on the housing bearing 22; a limiting groove matching the bearing sleeve limiting portion 203 is provided on the bearing sleeve 23, and the bearing sleeve limiting portion 203 and the limiting groove are used together to limit the bearing sleeve 23.

[0063] In the present invention Figures 1 to 11 In the illustrated embodiment, the sleeve portion 221 and the shell shaft 122 are both hollow cylindrical structures, wherein the shell shaft 122 is sleeved on the outer circumferential surface of the sleeve portion 221, and the stop portion 222 is an annular plate body arranged around the outer circumferential surface of the sleeve portion 221, that is, the stop portion 222 protrudes toward the side of the sleeve portion 221 close to the axis of the shell shaft 122; or the sleeve portion 221 is sleeved on the outer circumferential surface of the shell shaft 122, and the stop portion 222 is an annular plate body arranged around the inner wall surface of the sleeve portion 221, that is, the stop portion 222 protrudes toward the side of the sleeve portion 221 away from the axis of the shell shaft 122.

[0064] One implementation of the second embodiment is as follows:

[0065] The fan blade 11 includes a blade body 111 and a fan blade shaft 112 arranged on one side of the blade body 111, so as to be connected to one of the bearing assemblies 2. The fan housing 12 includes a housing body 121 and two housing shafts 122 arranged on opposite sides of the housing body 121, so as to be respectively connected to the two bearing assemblies 2. The two bearing assemblies 2 include a first bearing assembly 2001 and a second bearing assembly 2002.

[0066] The first bearing assembly 2001 includes a shell bearing 22 and a blade bearing 21 and a bearing sleeve 23 arranged in the shell bearing 22, the bearing sleeve 23 is clamped between the blade bearing 21 and the bearing seat 20, the blade bearing 21 is located on the side of the stop portion 222 of the shell bearing 22 away from the sleeve portion 221, and the shell bearing 22 is a hollow cylindrical structure for the blade shaft 112 to pass through; wherein, the blade bearing 21 is connected to the blade shaft 112 of the blade 11 to support the rotation of the blade 11, and the shell bearing 22 is connected to a shell shaft 122 of the fan housing 12 to support the rotation of the fan housing 12.

[0067] The second bearing assembly 2002 only includes a housing bearing 22, and the first motor 4 is arranged on a side of the fan 1 close to the second bearing assembly 2002 and on a side of the second bearing assembly 2002 away from the housing body 121 of the fan housing 12. The first motor shaft 41 of the first motor 4 passes through the housing bearing 22 and the through hole on the corresponding housing shaft 122 and enters the housing body 121 and is connected to the blade body 111 to drive the fan blade to rotate; the second motor 5 is also located on a side of the fan 1 close to the second bearing assembly 2002 and is connected to the housing shaft 122 there through the transmission structure 3 to drive the fan housing 12 to rotate.

[0068] The fan blade bearing 21 and the housing bearing 22 are made of lubricating material, or the surfaces of the fan blade bearing 21 and the housing bearing 22 are coated with lubricant.

[0069] like Figure 3 As shown, in the embodiment of the present invention, the diameter of the fan blade shaft 112 of the fan blade 11 is D1, and the inner diameter of the sleeve portion 221 is D2, wherein D2>D1.

[0070] Preferably, 7D1≥D2>D1.

[0071] The present invention provides an indoor unit, comprising an air duct rotating mechanism, and the air duct rotating mechanism is the above-mentioned air duct rotating mechanism.

[0072] The present invention also provides an air conditioner, comprising an indoor unit, wherein the indoor unit is the indoor unit described above.

[0073] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0074] The air duct rotating mechanism of the present invention comprises a fan 1 and two bearing assemblies 2. The fan 1 comprises a fan blade 11 and a fan housing 12. The fan blade 11 and the fan housing 12 can rotate independently of each other, so that the fan housing 12 replaces the air guide plate of the indoor unit of the air conditioner in the prior art to realize the upward and downward air supply of the indoor unit of the wall-mounted air conditioner or the left and right air supply of the indoor unit of the cabinet air conditioner, thereby increasing the air flow and wind sweeping angle of the indoor unit, improving the overall performance of the air conditioner, and meeting the comfort requirements of the user; the two bearing assemblies 2 are respectively arranged on opposite sides of the fan 1 along the axial direction of the fan 1 and fixed on the body of the indoor unit of the air conditioner. Both bearing assemblies 2 include a housing bearing 22 for connecting to the fan housing 12 to support it; wherein the housing bearing 22 includes a sleeve portion 221 for sleeve-engaging with the housing shaft 122 of the fan housing 12 and a stop portion 222 arranged at an end of the sleeve portion 221 away from the fan housing 12 to stop the axial movement of the fan housing 12, so as to limit the axial movement of the fan housing, reduce the influence of the axial movement of the fan housing 12 during the rotation process on the fan performance, thereby ensuring the stability and reliability of the air duct rotation mechanism, and solving the problem of axial movement of the fan housing of the air conditioner in the prior art.

[0075] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0076] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0077] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air duct rotating mechanism, characterized in that: include: A fan (1), the fan (1) comprising a fan blade (11) and a fan housing (12), the fan blade (11) and the fan housing (12) both being rotatably arranged to supply air and change an air outlet angle; Two bearing assemblies (2) are respectively arranged on opposite sides of the fan (1) along the axial direction of the fan (1) and fixed to the body of the indoor unit of the air conditioner, and the two bearing assemblies (2) each include a housing bearing (22) for connecting to the fan housing (12) to support the fan housing; The housing bearing (22) comprises a sleeve portion (221) for sleeve-engaging with a housing rotating shaft (122) of the fan housing (12), and a stop portion (222) arranged at an end of the sleeve portion (221) away from the fan housing (12) to stop axial movement of the fan housing (12); The air duct rotating mechanism comprises a transmission structure (3) for transmission connection with the fan housing (12); along the axial direction of the fan (1), An axial distance between the stopper portions (222) of the housing bearings (22) of the two bearing assemblies (2) is L1; The total axial length of the fan housing (12) is L2; The axial disengagement dimension of the transmission structure (3) is L3; The allowable axial movement dimension of the fan housing (12) is μ; Among them, μ=L1-L2, 0<μ<L3.

2. The air duct rotating mechanism according to claim 1, characterized in that: 0<μ<1 / 3L3.

3. The air duct rotating mechanism according to claim 1, characterized in that: At least one of the two bearing assemblies (2) comprises: A bearing seat (20) is used to be fixed on the body of the indoor unit of the air conditioner; The housing bearing (22) is arranged on the bearing seat (20), and the bearing seat (20) comprises a first mounting section (201) for mounting the housing bearing (22).

4. The air duct rotating mechanism according to claim 3, characterized in that: At least one of the two bearing assemblies (2) further comprises: A fan blade bearing (21), used for being sleeved on a fan blade rotating shaft (112) of the fan blade (11) to support the fan blade (11); The fan blade bearing (21) is arranged on the bearing seat (20), and the axis of the fan blade rotating shaft (112), the axis of the housing rotating shaft (122), the axis of the fan blade bearing (21), and the axis of the housing bearing (22) are collinear.

5. The air duct rotating mechanism according to claim 4, characterized in that: The bearing seat (20) is a hollow columnar structure; wherein: The fan blade bearing (21) and the housing bearing (22) are both arranged on the inner side of the bearing seat (20), the fan blade bearing (21) is located on a side of the housing bearing (22) away from the fan housing (12), and the stopper (222) is provided with an axial hole (220) for allowing the fan blade shaft (112) to pass through; or The fan blade bearing (21) is arranged on the inner side of the bearing seat (20), and the housing bearing (22) is arranged on the outer side of the bearing seat (20); or The fan blade bearing (21) and the housing bearing (22) are both arranged on the outside of the bearing seat (20), and the fan blade bearing (21) is located on a side of the housing bearing (22) close to the fan housing (12).

6. The air duct rotating mechanism according to claim 4, characterized in that: A bearing sleeve (23) is sandwiched between the fan blade bearing (21) and the bearing seat (20); The bearing seat (20) comprises a second mounting section (202) for mounting the bearing sleeve (23), and the second mounting section (202) is provided with a bearing sleeve limiting portion (203) for limiting axial movement of the bearing sleeve (23); The bearing sleeve (23) is provided with a limiting groove that matches the bearing sleeve limiting portion (203); the bearing sleeve limiting portion (203) and the limiting groove are used together to limit the bearing sleeve (23).

7. The air duct rotating mechanism according to claim 1, characterized in that: At least one of the two bearing assemblies (2) comprises: A fan blade bearing (21), used for being sleeved with a fan blade rotating shaft (112) of the fan blade (11) to support the fan blade (11); The housing bearing (22) is used to be fixed on the body of the indoor unit of the air conditioner, the housing rotating shaft (122) is rotatably arranged relative to the housing bearing (22), and the fan blade bearing (21) is arranged on the housing bearing (22).

8. The air duct rotating mechanism according to claim 7, characterized in that: The axis of the fan blade bearing (21), the axis of the fan blade rotating shaft (112), and the axis of the housing rotating shaft (122) are collinear; the housing bearing (22) comprises a mounting portion (223) for mounting the fan blade bearing (21); the mounting portion (223) is located on a side of the stop portion (222) away from the sleeve portion (221).

9. The air duct rotating mechanism according to claim 4 or 7, characterized in that: The sleeve connection portion (221) and the housing shaft (122) are both hollow columnar structures, wherein: The housing rotating shaft (122) is sleeved on the outer circumferential surface of the sleeve connection portion (221), and the stop portion (222) is an annular plate body arranged around the outer circumferential surface of the sleeve connection portion (221); or The sleeve connection portion (221) is sleeved on the outer peripheral surface of the housing shaft (122), and the stop portion (222) is an annular plate body arranged around the inner wall surface of the sleeve connection portion (221).

10. The air duct rotating mechanism according to claim 1, characterized in that: The air duct rotating mechanism also includes: a first motor (4), the first motor (4) being arranged at an end of one of the bearing assemblies (2) away from the fan (1), and being used for being drivingly connected to the fan blade (11) to drive the fan blade (11) to rotate; and / or A second motor (5), the second motor (5) being drivingly connected to the fan housing (12) via a transmission structure (3) so as to drive the fan housing (12) to rotate.

11. The air duct rotating mechanism according to claim 10, characterized in that: The first motor shaft (41) of the first motor (4) extends into the fan housing (12) to be connected to the blade body (111) of the fan blade (11); Wherein, the bearing assembly (2) close to the first motor (4) and the housing shaft (122) of the fan housing (12) are both provided with a through hole for allowing the first motor shaft (41) to pass through.

12. The air duct rotating mechanism according to claim 4 or 7, characterized in that: The diameter of the fan blade rotating shaft (112) of the fan blade (11) is D1, and the inner diameter of the sleeve connection portion (221) is D2, wherein D2>D1.

13. The air duct rotating mechanism according to claim 12, characterized in that: 7D1≥D2>D1.

14. An indoor unit, comprising an air duct rotating mechanism, characterized in that: The air duct rotating mechanism is the air duct rotating mechanism according to any one of claims 1 to 13.

15. An air conditioner, comprising an indoor unit, characterized in that: The indoor unit is the indoor unit according to claim 14.

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