Coaxial supporting structure of fan blade and flow guide assembly, fan and air conditioner

Abstract

The invention discloses a coaxial supporting structure of fan blades and a flow guide assembly, a fan and an air conditioner. The coaxial supporting structure of the fan blade and the flow guide assembly comprises a cross-flow fan blade and the flow guide assembly. The flow guide assembly is coaxially arranged in an inner cavity of the cross-flow fan blade. A motor fixed on a shell is connected with one end of a cross-flow fan blade through a first end cover, a second end cover is connected with the other end of the cross-flow fan blade, and a hollow rotating shaft on the outer side of the second end cover is supported on the shell; a short rotating shaft at one end of the diversion assembly is supported in a center hole in the inner side of the first end cover, and a long rotating shaft at the other end of the diversion assembly penetrates through a hollow rotating shaft on the second end cover to be connected with a stepping motor. The cross-flow fan assembly is stable in supporting foundation and small in amplitude, the coaxiality is easy to guarantee, and the ball bearing is adopted for supporting, so that the whole machine is convenient to manufacture and install and stable in operation. The bearings of the cross-flow blades and the bearings of the flow guide assemblies on the same side are axially overlapped and sleeved, and the structure is compact. And the production cost is effectively reduced, and batch production can be realized.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and more particularly to a coaxial support structure for a fan blade and a guide assembly, a fan including the support structure, and an air conditioner having the fan. Background Technology

[0002] Currently, most air conditioner indoor units installed on the upper walls or ceilings of rooms have side-discharge airflow. When the air conditioner is used for heating in winter, because hot air has a lower density, the side-discharged hot air rises and cannot reach the lower part of the room where users are located. This results in uneven temperature distribution within the room, creating a situation where the upper part is hot and the lower part is cold. This is particularly unpleasant for users who are sensitive to temperature.

[0003] To address the aforementioned problem, the direction of airflow output from the indoor fan of an air conditioner can be changed as needed. An existing fan design includes a cross-flow fan blade, a guide structure, and a housing surrounding the cross-flow fan blade, forming an air duct between the housing and the blade. The guide structure can rotate intermittently relative to the cross-flow fan. By controlling the rotation of the guide structure to different positions, when airflow passes through the air duct formed by the guide structure and the volute structure on the inner surface of the housing, eccentric vortices are formed at different positions, thereby changing the airflow direction in and out of the fan, thus controlling the fan to output air in different directions. However, since the fan consists of two parts—the cross-flow fan blade and the guide structure—they need to rotate at relatively different speeds. Theoretically, this solution can achieve automatic control of the fan's output air direction; however, due to its structural complexity, there is no explanation of how the cross-flow fan blade and guide structure support the relative rotation structure. Another type of air conditioner on the market, such as... Figure 1 As shown, it includes a housing 10, a fan blade 20, and a flow guide structure. The housing contains an air duct, with a volute on one side of the duct. The cross-flow fan blade is rotatably mounted within the air duct via supports at both ends. The flow guide structure is also located within the air duct on the side with the volute, surrounding the fan blade 20. Specifically, the flow guide structure includes semi-circular connectors 32, multiple of which are spaced apart along the axial direction of the cross-flow fan. Both ends of the connectors are fixed to the housing 10, and a series of rotatable guide vanes 31 are arranged between the connectors 32. These guide vanes are plate-shaped and fixed to a rotating shaft along the axial direction of the cross-flow fan, forming a group. All guide vanes 31 can rotate synchronously with the rotating shaft. Each group of guide vanes is arranged circumferentially along the cross-flow fan. The connectors 32 at the ends are equipped with a linkage drive mechanism to drive the rotation of each rotating shaft that fixes the guide vanes 31. By adjusting the rotation angle of the guide vane 31, the airflow within the duct of the outer body 10 is guided to achieve better fan performance, improve airflow uniformity, increase air volume, and reduce aerodynamic noise. However, existing technology does not provide a coaxial support structure in which the cross-flow fan and the guide structure can rotate relative to each other.

[0004] Therefore, in order to achieve the goal of changing the air outlet direction of the fan, it is a technical problem that needs to be solved in this field to provide a coaxial support structure that allows the cross-flow fan and the flow guide structure to rotate relative to each other, and the support structure needs to be easy to manufacture and install, compact in structure, and stable in operation. Summary of the Invention

[0005] To address the shortcomings of existing air conditioners, such as the lack of a convenient manufacturing and installation structure, compact design, stable operation, and a support structure that allows the fan and airflow guide structure to rotate relative to each other, this invention provides a novel coaxial support structure for the fan blades and airflow guide components, a fan equipped with this support structure, and an air conditioner incorporating the fan. This fan is convenient to manufacture and install, has a compact structure, operates smoothly overall, reduces related costs, and is easily mass-produced.

[0006] The present invention provides a coaxial support structure for a fan blade and a flow guide assembly, comprising a cross-flow fan blade and a flow guide assembly. The flow guide assembly is coaxially disposed within the inner cavity of the cross-flow fan blade. A motor fixed to the housing is connected to one end of the cross-flow fan blade via a first end cover, and a second end cover connected to the other side of the cross-flow fan blade has a hollow rotating shaft on its outer side supported on the housing. A short rotating shaft on one side of the flow guide assembly is supported in the inner surface of the first end cover, and a long rotating shaft on the other side of the flow guide assembly passes through the hollow rotating shaft on the second end cover and is connected to a stepper motor.

[0007] This invention coaxially mounts the airflow guide component within the inner cavity of the cross-flow fan blades. Both are driven by different motors, allowing the airflow guide component to rotate at different speeds relative to the cross-flow fan blades, thus changing the direction of airflow. The motor driving the cross-flow fan blades is fixed to the base shell, while the other end of the cross-flow fan blades is supported and fixed to the base shell. The airflow guide component is supported on the end caps on both sides of the fan. In other words, this invention uses the base shell as the mounting base to first install and level the cross-flow fan blades, and then uses the end caps at both ends of the cross-flow fan blades as a reference to install and level the airflow guide component, thus fixing the entire cross-flow fan assembly to the base shell. This setup simplifies the support of the cross-flow fan assembly, ensures a stable foundation with minimal vibration, and makes it easy to guarantee the coaxiality of the airflow guide component relative to the cross-flow fan blades, making the manufacturing and installation of the cross-flow fan assembly convenient.

[0008] Preferably, the outer circle of the first end cap is fixedly connected to the inner circle of one end of the cross-flow fan leaf.

[0009] Preferably, the hollow shaft of the second end cap is supported on the housing by a third rolling bearing.

[0010] Preferably, a rubber ring is also provided between the third rolling bearing and the housing.

[0011] Preferably, the short shaft of the flow guiding assembly is supported inside the first end cover by a first rolling bearing, and the long shaft of the flow guiding assembly is supported inside the second end cover by a second rolling bearing.

[0012] When ball bearings are added to support the cross-flow fan blades and guide components, the overall operation of the fan is smooth. The outer circle of one end cap is nested within the end face of the cross-flow fan blade, while the shaft of the guide component and the ball bearing are also housed within the end cap. This forms a situation where the inner ring of the bearing supports the shaft of the guide component, and the outer ring of the same bearing supports the rotation of the cross-flow fan blade, resulting in a compact fan structure. Therefore, this invention effectively reduces production costs, thus enabling more easily mass production.

[0013] Preferably, the flow guiding assembly includes two end plates, a short rotating shaft and a long rotating shaft disposed on the outer side of the end plates, and multiple flow guiding plates disposed between the two end plates.

[0014] Preferably, the multiple guide vanes are arranged side by side, the axial section of the guide vanes is arc-shaped, and an inlet and outlet air duct is formed between two adjacent guide vanes.

[0015] The airflow guiding component is configured as a cylinder that can rotate relative to the inner cavity of the cross-flow fan blade. The axial section of the airflow guiding plate is arc-shaped. Multiple airflow guiding plates are arranged side by side, and an inlet and outlet air duct is formed between two adjacent airflow guiding plates, which is beneficial for changing the direction of the fan's inlet and outlet airflow in cooperation with the cross-flow fan blade and the shell.

[0016] The fan provided by the present invention includes a coaxial support structure for the fan blades and the flow guide assembly.

[0017] The air conditioner provided by the present invention includes the aforementioned fan.

[0018] This invention coaxially mounts the airflow guide component within the inner cavity of the cross-flow fan blades. Both are driven by different motors, allowing the airflow guide component to rotate at different speeds relative to the cross-flow fan blades, thus changing the direction of airflow. Importantly, this invention fixes the motor driving the cross-flow fan blades to the base shell, while the other end of the cross-flow fan blades is supported and fixed to the base shell. The airflow guide component, however, is supported on the end caps on both sides of the fan. In other words, this invention uses the base shell as the mounting base to first install and level the cross-flow fan blades, and then uses the end caps at both ends of the cross-flow fan blades as a reference to install and level the airflow guide component, thus fixing the entire cross-flow fan assembly to the base shell. This setup provides a stable support foundation for the cross-flow fan assembly with minimal vibration; the coaxiality of the airflow guide component relative to the cross-flow fan blades is easily ensured; and the use of ball bearings to support the cross-flow fan blades and airflow guide component makes the manufacturing and installation of the cross-flow fan assembly convenient and ensures stable overall operation. Furthermore, the outer circle of one end cap is nested within the end face of the cross-flow fan blade, while the rotating shaft of the flow guide assembly and the rolling bearing are also housed within the end cap. This forms a situation where the inner ring of the bearing supports the rotating shaft of the flow guide assembly, and the outer ring of the same bearing supports the rotation of the cross-flow fan blade, resulting in a compact fan structure. Therefore, this invention effectively reduces production costs, thereby enabling more easily mass production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an existing wind turbine;

[0020] Figure 2 This is a three-dimensional schematic diagram of an embodiment of the cross-flow fan of the present invention;

[0021] Figure 3 for Figure 2 Exploded view of a cross-flow fan;

[0022] Figure 4 This is a three-dimensional schematic diagram of the flow guiding component of the cross-flow fan of the present invention;

[0023] Figure 5 This is a cross-sectional view of the cross-flow fan of the present invention;

[0024] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0025] Figure 7 for Figure 5 Enlarged view of a section at point B in the middle;

[0026] Figure 8 A schematic diagram showing the change in the airflow state of the fan after the airflow guide component rotates;

[0027] Figure 9 This is a schematic diagram showing the change in the airflow state of the fan after the airflow guide component rotates.

[0028] Figure label:

[0029] 1-Bottom shell, 2-Cross-flow fan, 3-Flow guide assembly, 33-Short shaft, 34-Long shaft, 35-Flow guide plate, 4-Motor, 5-Stepper motor, 6-First end cover, 7-Second end cover, 71-Hollow shaft, 8-Hex socket screw, 9-First rolling bearing, 101-Second rolling bearing, 11-Third rolling bearing. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the invention and do not constitute a limitation thereof.

[0031] Please refer to Figure 2 , Figure 3 and Figure 4 The first embodiment of the coaxial support structure for the fan blade and the air guide assembly provided by the present invention includes a cross-flow fan blade 2 and an air guide assembly 3, with the air guide assembly 3 coaxially disposed within the inner cavity of the cross-flow fan blade 2. A motor 4 is connected to the left end of the cross-flow fan blade via a first end cap 6, and the motor is fixed to the housing 1. A second end cap 7 is fixedly connected to the right side of the cross-flow fan blade 2, and a hollow rotating shaft 71 is provided at the center of the outer side of the second end cap and supported on the housing 1. A short rotating shaft 33 on the left side of the air guide assembly 3 is supported in the central hole on the inner side of the first end cap 6, and a long rotating shaft 34 on the right side of the air guide assembly 3 passes through the hollow rotating shaft 71 on the second end cap 7 and is connected to a stepper motor 5.

[0032] This invention coaxially mounts the airflow guide component within the inner cavity of the cross-flow fan blades. Both are driven by different motors, allowing the airflow guide component to rotate at different speeds relative to the cross-flow fan blades, thus changing the direction of airflow. The motor driving the cross-flow fan blades is fixed to the base shell, while the other end of the cross-flow fan blades is supported and fixed to the base shell. The airflow guide component is supported on the end caps on both sides of the fan. In other words, this invention uses the base shell as the mounting base to first install and level the cross-flow fan blades, and then uses the end caps at both ends of the cross-flow fan blades as a reference to install and level the airflow guide component, thus fixing the entire cross-flow fan assembly to the base shell. This setup simplifies the support of the cross-flow fan assembly, ensures a stable foundation with minimal vibration, and makes it easy to guarantee the coaxiality of the airflow guide component relative to the cross-flow fan blades, making the manufacturing and installation of the cross-flow fan assembly convenient.

[0033] The second embodiment provided by the present invention, such as Figures 2-7 As shown, the main structure of this embodiment is the same as that of Embodiment 1, except that the structure is as follows: Figure 6As shown, the outer circle of the first end cover 6 is inserted into the inner circle of the left end of the cross-flow fan blade 2, and is fixedly connected by an interference fit to ensure synchronous rotation. The output shaft of the motor 4 is inserted into the center hole on the outer side of the first end cover 6 and fixed to the first end cover 6 by an internal hex screw 8. Other connection methods can also be used, such as key connection. Figure 7 As shown, the hollow rotating shaft 71 of the second end cover 7 at the right end of the cross-flow fan blade 2 is supported on the housing 1 by a third rolling bearing 11. A rubber ring is also provided between the third rolling bearing 11 and the housing for shock absorption. The flat square output shaft of the motor 5 is inserted into the long rotating shaft 34 on the right side of the flow guide assembly 3 to achieve coaxial connection and ensure synchronous rotation.

[0034] like Figure 5 , Figure 6 , Figure 7 As shown, in this embodiment, the short rotating shaft 33 on the left side of the flow guiding component 3 is supported in the central hole inside the first end cover 6 by the first rolling bearing 9, and the long rotating shaft 34 on the right side of the flow guiding component 3 is supported in the central hole inside the second end cover 7 by the second rolling bearing 101.

[0035] When ball bearings are added to support the cross-flow fan blades 2 and the flow guide assembly 3, the overall operation of the fan is stable. The outer circle of one end cap is nested within the end face of the cross-flow fan blade, and the rotating shaft of the flow guide assembly and the ball bearing are also housed within the end cap. This forms a situation where the inner ring of the bearing supports the rotating shaft of the flow guide assembly, and the outer ring of the same bearing supports the rotation of the cross-flow fan blade, resulting in a compact fan structure. Therefore, this invention effectively reduces production costs, thus enabling more easily mass production.

[0036] like Figure 4 As shown, the flow guiding assembly 3 of the present invention includes two end plates, a short rotating shaft 33 disposed on the outer side of the left end plate, a long rotating shaft 34 disposed on the outer side of the right end plate, and multiple flow guiding plates 35 disposed between the two end plates. Please refer to... Figure 8 , Figure 9 As shown, the axial section of the guide plate 35 is arc-shaped, and multiple guide plates 35 are arranged side by side, forming an inlet and outlet air duct between adjacent guide plates. The guide assembly 3 is set as a cylinder that can rotate relative to the inner cavity of the cross-flow fan blade 2. The axial section of the guide plate is arc-shaped, and multiple guide plates are arranged side by side, forming an inlet and outlet air duct between adjacent guide plates, which is beneficial for changing the direction of the fan's inlet and outlet air when cooperating with the cross-flow fan blade 2 and the housing 1.

[0037] This invention provides a cross-flow fan with a coaxial support structure including the aforementioned fan blades and air guide components, and also provides an air conditioner with the cross-flow fan end side. The coaxial support structure provided by this invention is relatively simple and can be used not only in the air conditioning industry, but also widely in other mechanical equipment that requires changing the airflow direction, such as blowers and centrifugal pumps, demonstrating good versatility and promotional value.

[0038] During operation, the motor 4 outputs torque to drive the first end cover 6 and the cross-flow fan blade 2 to rotate. On the right side, the second end cover 7 and its hollow rotating shaft 71 maintain stable rotation via a third rolling bearing 11 fixed to the bottom shell. When the flow guide assembly 3 needs to rotate, the stepper motor 5 at the right end drives the flow guide assembly to rotate intermittently by a certain angle, thereby achieving the switching of the air duct and airflow direction, i.e., realizing the change of the inlet and outlet airflow direction of the cross-flow fan (e.g., ...). Figure 8 , Figure 9 (As shown). The cross-flow fan blade 2 and the guide assembly 3 are each supported by their own bearings and do not affect each other. In addition, all contact surfaces need to be lubricated with silicone grease or similar oil to extend service life and reduce operating noise.

[0039] It should be noted that the terminology used in this specification is for describing specific embodiments only and is not intended to limit the invention. Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the technical features and steps set forth in these embodiments do not limit the scope of protection of this invention.

[0040] Techniques, methods, and apparatus known to those skilled in the art are not discussed in detail herein, but where appropriate, such techniques, methods, and apparatus should be considered part of this specification. Any specific values ​​in this specification should be interpreted as merely exemplary and not as limiting the invention.

[0041] For ease of description, the terms used in the specification to describe position, such as "above", "to the left", "in front", etc., are only used to describe the spatial positional relationship between a component and other components in the embodiment shown in the figure. When the position of the component is different, the relative position will change. Therefore, the positional relationship of the embodiment in the figure should not be construed as limiting the present invention.

[0042] Furthermore, it should be noted that the use of terms such as "first" and "second" in the specification is merely for distinguishing similar components and does not imply any order of precedence. Therefore, it should not be construed as limiting the scope of protection of this invention.

[0043] The above description is merely a specific embodiment of the present invention. It should be noted that any modifications, equivalent substitutions, and variations made within the spirit and framework of the present invention should be included within the protection scope of the present invention.

Claims

1. A coaxial support structure for a fan blade and a flow guide assembly, comprising a cross-flow fan blade and a flow guide assembly, characterized in that, The flow guiding component is coaxially disposed in the inner cavity of the cross-flow fan blade; the motor fixed on the housing is connected to one end of the cross-flow fan blade through the first end cover, and the second end cover connected to the other end of the cross-flow fan blade has a hollow rotating shaft on its outer side supported on the housing; the short rotating shaft at one end of the flow guiding component is supported in the inner center hole of the first end cover, and the long rotating shaft at the other end of the flow guiding component passes through the hollow rotating shaft on the second end cover and is connected to the stepper motor.

2. The coaxial support structure for the fan blade and guide assembly as described in claim 1, characterized in that, The outer circle of the first end cap is engaged with the inner circle of the corresponding end of the cross-flow fan leaf to form a fixed connection.

3. The coaxial support structure for the fan blade and guide assembly as described in claim 1, characterized in that, The hollow shaft of the second end cap is supported on the housing by a third rolling bearing.

4. The coaxial support structure of the fan blade and guide assembly as described in claim 3, characterized in that, A rubber ring is also provided between the third rolling bearing and the housing.

5. The coaxial support structure for the fan blade and guide assembly as described in claim 1, characterized in that, The short shaft of the flow guide assembly is supported in the central hole inside the first end cap by a first rolling bearing, while the long shaft of the flow guide assembly is supported in the central hole inside the second end cap by a second rolling bearing.

6. The coaxial support structure of the fan blade and guide assembly as described in claim 1, characterized in that, The flow guiding assembly includes two end plates, each with a short rotating shaft and a long rotating shaft on its outer side, and multiple flow guiding plates disposed between the two end plates.

7. The coaxial support structure for the fan blade and guide assembly as described in claim 6, characterized in that, The multiple guide vanes are arranged side by side, and the axial section projection of the guide vanes is arc-shaped, forming an inlet and outlet air duct between two adjacent guide vanes.

8. A cross-flow fan, characterized in that, It includes a coaxial support structure for the fan blades and guide vanes as described in any one of claims 1 to 7.

9. An air conditioner, characterized in that, Includes the cross-flow fan as described in claim 8.

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