Outer rotor for cross-flow fan, outer rotor motor and cross-flow fan

Abstract

The utility model provides an outer rotor for a cross-flow fan, an outer rotor motor and the cross-flow fan, the outer rotor comprises an elastic buffer pad coaxially fixed at the end part of an impeller of the cross-flow fan and a magnetic ring part coaxially fixed on the elastic buffer pad, and the elastic buffer pad is made of rubber or silica gel. According to the cross-flow fan, the elastic buffering pad is arranged on the outer rotor, vibration generated by movement of the outer rotor motor is reduced through the elastic buffering pad, and noise generated when the cross-flow fan works is reduced.

Description

Technical Field

[0001] Embodiments of the present utility model relate to the field of household electrical appliance products. More specifically, the present utility model relates to an outer rotor, an outer rotor motor and a cross-flow fan for a cross-flow fan. Background Art

[0002] As a core component in household electrical appliance products, the cross-flow fan is widely used in equipment such as air conditioners, air purifiers, and warm air heaters. Its performance directly affects the overall operating efficiency of the product and the user experience. With the continuous improvement of consumers' requirements for the performance of household electrical appliance products, higher requirements are also put forward for the aspects such as the quietness, reliability, and energy efficiency ratio of the cross-flow fan.

[0003] In known applications of cross-flow fans, the outer rotor motor is gradually being widely used due to its advantages such as a compact structure and excellent heat dissipation effect. Specifically, the outer rotor motor is fixedly connected to the impeller of the cross-flow fan, thereby effectively driving the impeller to rotate. However, during actual operation, the rotation of the outer rotor motor drives the vibration of the cross-flow fan, resulting in a relatively large noise of the cross-flow fan. This problem not only affects the user experience but also restricts the further application and promotion of the cross-flow fan to a certain extent. Summary of the Utility Model

[0004] In order to solve one or more of the above-mentioned technical problems, the present utility model provides an outer rotor, an outer rotor motor and a cross-flow fan for a cross-flow fan. By providing an elastic buffer pad on the outer rotor, the elastic buffer pad is used to reduce the vibration generated during the movement of the outer rotor motor, thereby reducing the noise during the operation of the cross-flow fan.

[0005] In a first aspect, the present utility model provides an outer rotor for a cross-flow fan. The outer rotor includes an elastic buffer pad coaxially fixed to the end of the impeller of the cross-flow fan, and a magnetic ring component coaxially fixed to the elastic buffer pad. The elastic buffer pad is made of rubber or silica gel.

[0006] The present utility model reduces the noise during the operation of the cross-flow fan by providing an elastic buffer pad on the outer rotor and using the elastic buffer pad to absorb the vibration generated during the movement of the outer rotor motor.

[0007] In a possible way, the elastic buffer pad includes a pad body, a first convex that is arranged on one side of the pad body and embedded in the magnetic ring component, and a second convex that is arranged on the other side of the pad body and embedded in the end of the impeller.

[0008] In a possible way, in the circumferential direction of the elastic buffer pad, the first convex and the second convex are arranged in a staggered manner.

[0009] One possible way is that the number of the first clamping protrusions is multiple, and the multiple first clamping protrusions are arranged uniformly along the circumferential direction on one side of the cushion body.

[0010] One possible way is that the number of the second clamping protrusions is multiple, and the multiple second clamping protrusions are arranged uniformly along the circumferential direction on the other side of the cushion body.

[0011] One possible way is that the cross-section of the first clamping protrusion continuously decreases or decreases step by step along the direction close to the second clamping protrusion, and the cross-section of the second clamping protrusion continuously decreases or decreases step by step along the direction close to the first clamping protrusion.

[0012] One possible way is that the thickness of the cushion body of the elastic buffer pad is 6 cm to 9 cm, and the rubber is ethylene propylene rubber.

[0013] One possible way is that the impeller body of the impeller is made of resin, the magnetic ring component includes a resin base material and magnetic powder uniformly dispersed in the resin base material, and the impeller, the elastic buffer pad and the magnetic ring component are multi-component injection molded parts.

[0014] In a second aspect, the present utility model provides an external rotor motor for a cross-flow fan, including:

[0015] The external rotor for a cross-flow fan as described in the first aspect;

[0016] An inner stator, part of which is arranged inside the external rotor and is coaxial with the external rotor.

[0017] In a third aspect, the present utility model provides a cross-flow fan, including:

[0018] An impeller: which is provided with a rotating shaft;

[0019] The external rotor motor as described in the second aspect: which is coaxially fixed at the end of the impeller;

[0020] An oil-containing sliding bearing, which is arranged between the rotating shaft and the external rotor and allows the rotating shaft to rotate therein. Description of the Drawings

[0021] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features and advantages of the exemplary embodiments of the present utility model will become easy to understand. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 It is a partial detailed view of an external rotor for a cross-flow fan provided by an embodiment of the present application;

[0023] Figure 2 A perspective view of an elastic buffer pad provided by an embodiment of the present application;

[0024] Figure 3 A side view of an elastic buffer pad provided by an embodiment of the present application;

[0025] Figure 4 A structural diagram of an outer rotor motor for a cross-flow fan provided by an embodiment of the present application;

[0026] Figure 5 A partial sectional view of a cross-flow fan provided by an embodiment of the present application.

[0027] Explanation of reference numerals: 100, outer rotor motor; 2, inner stator; 200, impeller; 1, outer rotor; 11, magnetic ring component; 12, elastic buffer pad; 120, pad body; 121, first convex; 122, second convex; 2001, rotating shaft; 3, oil-impregnated sliding bearing. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present disclosure.

[0029] As a core component in household electrical appliances, the cross-flow fan is widely used in equipment such as air conditioners, air purifiers, and heaters. Its performance directly affects the overall operating efficiency and user experience of the product. With the continuous improvement of consumers' requirements for the performance of household electrical appliances, higher requirements are also put forward for aspects such as the quietness, reliability, and energy efficiency ratio of the cross-flow fan.

[0030] In the known applications of cross-flow fans, the outer rotor motor is gradually being widely used due to its advantages such as compact structure and excellent heat dissipation effect. Specifically, the outer rotor motor is fixedly connected to the impeller of the cross-flow fan, thereby effectively driving the impeller to rotate. However, during actual operation, the rotation of the outer rotor motor drives the vibration of the cross-flow fan, resulting in relatively high noise of the cross-flow fan. This problem not only affects the user experience but also restricts the further application and promotion of the cross-flow fan to a certain extent.

[0031] In view of this, the present application provides an outer rotor, an outer rotor motor, and a cross-flow fan for a cross-flow fan. By providing an elastic buffer pad on the outer rotor, the vibration generated due to the movement of the outer rotor motor is reduced by the elastic buffer pad, and the noise during the operation of the cross-flow fan is reduced.

[0032] To solve the above problems, an embodiment of the present utility model provides an outer rotor for a cross-flow fan. Referring to Figure 1 , the outer rotor includes an elastic buffer pad 12 and a magnetic ring component 11. The elastic buffer pad 12 is coaxially fixed to the end of the impeller of the cross-flow fan, and the magnetic ring component 11 is coaxially fixed to the elastic buffer pad 12.

[0033] Regarding the selection of the material of the elastic buffer pad 12, rubber or silica gel can be specifically used, such as natural rubber, styrene-butadiene rubber, polyurethane rubber, silicone rubber, ethylene-propylene rubber, and silica gel, which are not limited herein.

[0034] By providing the elastic buffer pad 12 on the outer rotor, the vibration generated due to the movement of the outer rotor motor 100 is reduced, and the noise during the operation of the cross-flow fan is reduced.

[0035] In a preferred embodiment, continue to refer to Figure 1 , in order to improve the connection strength between the impeller 200 and the elastic buffer pad 12 and the connection strength between the magnetic ring component 11 and the elastic buffer pad 12, the elastic buffer pad 12 includes a pad body 120, a first convex 121, and a second convex 122. The first convex 121 is provided on one side of the pad body 120 and is embedded in the magnetic ring component, and the second convex 122 is provided on the other side of the pad body 120 and is embedded in the end of the impeller 200. Thus, the first convex 121 embedded in the magnetic ring component can effectively improve the connection strength and reliability between the magnetic ring component 11 and the elastic buffer pad 12, and the second convex 122 embedded in the end of the impeller 200 can also effectively improve the connection strength and reliability between the impeller 200 and the elastic buffer pad 12, thereby ensuring the stable and safe operation of the outer rotor motor 100.

[0036] Preferably, the cross-section of the first convex 121 continuously decreases or decreases stepwise along the direction close to the second convex 122, and the cross-section of the second convex 122 continuously decreases or decreases stepwise along the direction close to the first convex 121. The cross-section reduction design of the first convex 121 and the second convex 122 can improve the connection strength of the corresponding connection points. In addition, the continuous reduction design can reduce the stress concentration phenomenon at the connection points compared with the stepwise reduction design and avoid the occurrence of breakage.

[0037] Combined with Figure 2 and Figure 3 , in a preferred embodiment, as described above, when the outer rotor motor rotates, vibration will be generated, and thus the elastic buffer pad 12 will bear the stress generated by the vibration of the outer rotor motor during rotation. In order to disperse the stress borne by the elastic buffer pad 12, in the circumferential direction of the elastic buffer pad 12, the first convex 121 and the second convex 122 are staggered. By the above method, the stress borne by the elastic buffer pad 12 can be dispersed.

[0038] Preferably, in order to evenly disperse the stress borne by the elastic buffer pad 12, the foregoing first convex 121 and second convex 122 are respectively and evenly distributed on both sides of the elastic buffer pad 12. At the same time, the number of the first convex 121 and the second convex 122 can be increased. Specifically, the number of the first convex 121 is multiple, and the multiple first convex 121 are evenly arranged along the circumferential direction on one side of the pad body 120, and the number of the second convex 122 is multiple, and the multiple second convex 122 are evenly arranged along the circumferential direction on the other side of the pad body 120.

[0039] In the above manner, the stress generated by the rotation vibration of the external rotor motor 100 on the elastic buffer pad 12 can be dispersed, the vibration damping effect of the external rotor motor 100 can be improved, and the noise can be further reduced.

[0040] On the basis of all the foregoing embodiments, the thickness of the pad body 120 of the elastic buffer pad 12 is 6 cm to 9 cm, and the rubber is ethylene propylene rubber. Specifically, the thickness of the pad body 120 of the elastic buffer pad 12 is positively correlated with the output power of the external rotor motor 100. Specifically, taking an air conditioner of one horsepower as an example, the thickness of the elastic buffer pad 12 is 6 cm, and taking an air conditioner of three horsepower as an example, the thickness of the elastic buffer pad 12 is 9 cm. Compared with other rubber materials, ethylene propylene rubber has good weather resistance, corrosion resistance and aging resistance, and can maintain its physical properties within different temperature ranges. The elastic buffer pad 12 made of this material has stronger reliability.

[0041] Refer to Figure 1 , on the basis of the foregoing embodiments, the connection between the impeller 200 and the elastic buffer pad 12 and the connection between the magnetic ring component 11 and the elastic buffer pad 12 can be selected as bonding, welding or connection implemented by a multi-component injection molding process. As an example, the magnetic ring component 11 includes a resin base material (such as polyurethane or polyethylene, etc.) and magnetic powder (such as ferrite, neodymium iron boron and samarium iron, etc. powders) evenly dispersed and embedded in the resin base material. The impeller 200, the elastic buffer pad 12 and the magnetic ring component 11 are multi-component injection molded parts. That is to say, when the impeller 200, the elastic buffer pad 12 and the magnetic ring component 11 are multi-component injection molded parts, the foregoing two connections can be implemented and realized by a multi-component injection molding process, which has higher connection strength compared with bonding and welding, and the corresponding clamping protrusions are also formed and embedded in the impeller 200 or the magnetic ring component 11 more conveniently and reliably.

[0042] On the basis of the foregoing embodiments, refer to Figure 4 , the present utility model further provides an external rotor motor 100 for a cross-flow fan, including: an external rotor 1 and an internal stator 2, and a part of the internal stator 2 is arranged inside the external rotor 1 and is coaxial with the external rotor 1.

[0043] The outer rotor and beneficial effects in the present utility model are specifically referred to the foregoing, and will not be elaborated herein.

[0044] On the basis of the foregoing embodiments, with reference to Figure 5 , the present utility model further provides a cross-flow fan, including: an impeller 200, an outer rotor motor 100, and an oil-impregnated sliding bearing 3. The outer rotor motor 100 is coaxially fixed at the end of the impeller 200. The impeller 200 is provided with a rotating shaft 2001. The oil-impregnated sliding bearing is arranged between the rotating shaft 2001 and the outer rotor. At the same time, the oil-impregnated sliding bearing allows the rotating shaft 2001 to rotate within the oil-impregnated sliding bearing 3.

[0045] The outer rotor motor in the present utility model and the beneficial effects of the embodiments of the present utility model are specifically referred to the foregoing, and will not be elaborated herein.

[0046] In the above description of the present application, unless otherwise clearly specified and limited, terms such as "fixed", "installed", "connected" or "coupled" should be understood in a broad sense. For example, with respect to the term "connected", it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly limited in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to specific circumstances.

[0047] According to the above description of the present application, those skilled in the art can also understand the following terms used, such as terms indicating orientation or position relationship, such as "inner", "outer", "axial", "radial", "circumferential", etc., are based on the orientation or position relationship shown in the drawings of the present application. It is only for the purpose of facilitating the description of the solution of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in the specific orientation. Therefore, the above orientation or position relationship terms cannot be understood or interpreted as a limitation to the solution of the present utility model.

[0048] In addition, terms such as "first" or "second" used in the present application to refer to numbers or ordinals are only for descriptive purposes, and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means at least two, such as two, three or more, etc., unless otherwise clearly specifically limited.

[0049] Although several embodiments of the present utility model have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art can conceive of many changes, alterations, and alternative ways without departing from the spirit and scope of the present utility model. It should be understood that various alternative embodiments of the present utility model described herein may be employed in the practice of the present utility model. The appended claims are intended to define the scope of protection of the present utility model and thus cover equivalents or alternatives within the scope of these claims.

Claims

1. An external rotor for a cross-flow fan, characterized in that, The outer rotor includes an elastic buffer pad coaxially fixed to the end of the impeller of the cross-flow fan, and a magnetic ring component coaxially fixed to the elastic buffer pad. The elastic buffer pad is made of rubber or silica gel.

2. The outer rotor according to claim 1, wherein The elastic buffer pad includes a pad body, a first convex that is provided on one side of the pad body and embedded in the magnetic ring component, and a second convex that is provided on the other side of the pad body and embedded in the end of the impeller.

3. The outer rotor according to claim 2, characterized in that, In the circumferential direction of the elastic buffer pad, the first convex and the second convex are staggered.

4. The outer rotor according to claim 3, characterized in that, The number of the first convexes is multiple, and the multiple first convexes are uniformly arranged along the circumferential direction on one side of the pad body.

5. The outer rotor according to claim 3, characterized in that, The number of the second convexes is multiple, and the multiple second convexes are uniformly arranged along the circumferential direction on the other side of the pad body.

6. The outer rotor according to claim 2, characterized in that, The cross-section of the first convex continuously decreases or decreases step by step along the direction close to the second convex, and the cross-section of the second convex continuously decreases or decreases step by step along the direction close to the first convex.

7. The outer rotor according to any one of claims 2 to 6, characterized in that, The thickness of the pad body of the elastic buffer pad is 6 cm to 9 cm, and the rubber is ethylene propylene rubber.

8. The outer rotor according to any one of claims 2 to 6, characterized in that, The impeller body of the impeller is made of resin. The magnetic ring component includes a resin base material and magnetic powder uniformly dispersed in the resin base material, and the impeller, the elastic buffer pad and the magnetic ring component are multi-component injection molded parts.

9. An external rotor motor for a cross-flow fan, characterized in that, Comprising: The outer rotor for a cross-flow fan according to any one of claims 1 to 7; An inner stator, a part of which is arranged in the outer rotor and is coaxial with the outer rotor.

10. A cross-flow fan, characterized in that, Comprising: An impeller: which is provided with a rotating shaft; The outer rotor motor according to claim 8: which is coaxially fixed to the end of the impeller; An oil-containing sliding bearing, which is arranged between the rotating shaft and the outer rotor and allows the rotating shaft to rotate therein.

Images