WO2021169437A1

WO2021169437A1 - Cross-flow fan and air conditioner

Info

Publication number: WO2021169437A1
Application number: PCT/CN2020/130819
Authority: WO
Inventors: 蔡泽瑶; 荆涛; 刘娟; 高丽丽
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2020-02-24
Filing date: 2020-11-23
Publication date: 2021-09-02
Also published as: CN113294354B; CN113294354A

Abstract

Disclosed are a cross-flow fan and an air conditioner with same. The cross-flow fan comprises: a first fan blade portion (10) which comprises a plurality of first blades (101) forming a cylindrical shape in a surrounding manner and a connecting ring (11) with a plurality of via holes (12); and a second fan blade portion (20), comprising a plurality of second blades (201) forming a cylindrical shape in a surrounding manner, wherein each second blade (201) passes through one via hole (12), such that the second fan blade portion (20) can be coaxially connected to the first fan blade portion (10) in a sleeving manner and can move relative to the first fan blade portion (10) in the axial direction. The cross-flow fan is used in the air conditioner, and when the cross-flow fan is assembled and disassembled, the cross-flow fan can be easily taken out of the air conditioner by adjusting the length of the cross-flow fan; and the air supply effect can be adjusted by adjusting the length of the cross-flow fan.

Description

Cross flow fan, air conditioner

This application is filed based on a Chinese patent application with an application number of 202010112399.8 and an application date of February 24, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

This application relates to the technical field of air conditioning devices, such as a cross-flow fan and an air conditioner.

Background technique

The cross-flow fan is a special fan, which is multi-blade, long cylindrical, and has a certain length in the axial direction. Cross-flow wind can send the wind far away under low noise conditions, and the airflow at the air outlet is more evenly distributed along the axial direction, which is difficult for other types of fans to achieve. Cross flow fans are often used in equipment that requires air supply, such as air conditioners. The existing indoor unit of the on-hook air conditioner usually has a cross-flow fan fixed on the frame. If it is to be disassembled, after-sales personnel are required to operate it. There are many structures that need to be dismantled, and other structures are easily damaged during disassembly and assembly, which affects functionality.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problem exists in the related art: the cross-flow fan is difficult to be disassembled and assembled in the air supply device.

Summary of the invention

In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not a general comment, nor is it intended to determine key/important components or describe the protection scope of these embodiments, but serves as a prelude to the detailed description that follows.

The embodiments of the present disclosure provide a cross-flow fan and an air conditioner to solve the problem that the cross-flow fan is difficult to be disassembled and assembled in an air supply device.

In some embodiments, the cross-flow fan includes: a first blade portion including a plurality of first blades enclosed in a cylindrical shape and a connecting ring with a plurality of via holes; and a second fan portion including a cylindrical portion A plurality of second blades, each of the second blades passes through a through hole, so that the second blade part is coaxially sleeved with the first blade part and can move relative to the first blade part in the axial direction.

In some embodiments, the air conditioner includes the cross-flow fan as provided in the previous embodiments.

The cross flow fan and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects: the first fan blade portion is provided with a connecting ring with multiple through holes, and each second blade passes through one through hole to make the cross flow fan The second fan blade part is coaxially sleeved with the first fan blade part, and can move relative to the first fan blade part in the axial direction. When the second fan blade portion moves relative to the first fan blade portion, the length of the cross-flow fan in the axial direction can be adjusted. The cross-flow fan is used in the air conditioner. When the cross-flow fan is disassembled, the length of the cross-flow fan can be adjusted, so that the cross-flow fan can be easily taken out of the air conditioner. Moreover, by adjusting the length of the cross-flow fan, you can also Adjust the air supply effect.

The above general description and the following description are only exemplary and explanatory, and are not used to limit the application.

Description of the drawings

One or more embodiments are exemplified by the accompanying drawings. These exemplified descriptions and drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

Fig. 1 is a schematic diagram of an exploded structure of a cross-flow fan provided by an embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of a cross flow fan provided by an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a cross-flow fan provided in an embodiment of the present disclosure in a stretched state;

4 is a schematic structural diagram of a cross-flow fan provided by an embodiment of the present disclosure in a contracted state;

Fig. 5 is an enlarged view of part A of Fig. 1;

6 is a schematic structural diagram of another cross-flow fan provided by an embodiment of the present disclosure in a stretched state;

FIG. 7 is a schematic structural diagram of another cross-flow fan provided by an embodiment of the present disclosure in a contracted state;

Fig. 8 is a partial exploded view of an air conditioner provided by an embodiment of the present disclosure.

Reference signs:

10. The first blade part; 101, the first blade; 11. the connecting ring; 12, the through hole; 120, the extending part; 121, the clamping part; 211. The first limiting structure; 30. The third fan blade portion; 40. Air duct; 41. Opening; 42, Cover plate; 420. Pressing portion; 43. Shell.

Detailed ways

In order to have a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a number of details are used to provide a sufficient understanding of the disclosed embodiments. However, without these details, one or more embodiments can still be implemented. In other cases, in order to simplify the drawings, well-known structures and devices may be simplified for display.

The terms “first” and “second” in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances for the purposes of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "in", "outer", "front", "rear", etc., are based on the directions shown in the drawings or Positional relationship. These terms are mainly used to better describe the embodiments of the present disclosure and the embodiments thereof, and are not used to limit that the indicated device, element, or component must have a specific orientation, or be constructed and operated in a specific orientation. In addition, some of the above terms may be used to indicate other meanings in addition to the orientation or position relationship. For example, the term "shang" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific situations.

In addition, the terms "set", "connected", and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or two devices, components, or The internal communication between the components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the embodiments of the present disclosure can be understood according to specific situations.

Unless otherwise stated, the term "plurality" means two or more.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B means: A or B.

The term "and/or" refers to an association relationship describing objects, which means that there can be three relationships. For example, A and/or B means: A or B, or, A and B.

It should be noted that, in the case of no conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

As shown in FIGS. 1 to 5, an embodiment of the present disclosure provides a cross-flow fan, which includes a first fan blade portion 10 and a second fan blade portion 20. The first blade portion 10 includes a plurality of first blades 101 enclosed in a cylindrical shape and a connecting ring 11 having a plurality of via holes 12; the second fan portion 20 includes a plurality of second blades 201 enclosed in a cylindrical shape Each second blade 201 passes through a through hole 12 so that the second fan blade portion 20 is coaxially sleeved with the first fan blade portion 10 and can move relative to the first fan blade portion 10 in the axial direction.

The first fan blade portion 10 and the second fan blade portion 20 are both cylindrical. When the cross flow fan rotates, the first fan blade portion 10 and the second fan blade portion 20 rotate, and the airflow enters the first fan from one side in the radial direction. One blade part 10 is then blown out from the other side of the first blade part 10; The second blade portion 20 is provided coaxially with the first blade portion 10, and can uniform the direction of the air flow blown by the cross flow fan when rotating.

The first fan blade portion 10 is sleeved with the second fan blade portion 20, and the second fan blade portion 20 can move in the axial direction relative to the first fan blade portion 10, that is, the first fan blade portion 10 and the second fan blade portion 20 Like the sleeve structure, the diameter of one blade part is larger than the diameter of the other blade part, so that the first blade part 10 and the second fan blade part 20 move relative to each other in the axial direction, thereby adjusting the cross flow fan length. When the length of the cross-flow fan is shortened, the space occupied by the cross-flow fan is reduced. As shown in FIG. 11, the cross-flow fan can pass through the smaller opening 41. When the cross-flow fan is applied to an air conditioner, an opening 41 shorter than the cross-flow fan can be provided in the casing 43 of the air conditioner or the wall of the air duct 40, and the shortened cross-flow fan can pass through the opening 41. In this way, the cross-flow fan can be easily taken out of the air conditioner, which is convenient for cleaning, replacing or repairing the cross-flow fan. When the length of the cross flow fan is extended, the air supply range is increased, and when the length of the cross flow fan is reduced, the air supply range is reduced. The length of the cross flow fan can also be adjusted between the shortest and the longest, and the length of the cross flow fan can be adjusted according to the air supply requirements.

Optionally, the first fan blade portion 10 and/or the second fan blade portion 20 is provided with a fixed disk. The fixing disk is used to fix the blades of the first blade portion 10 and/or the second blade portion 20 so that they can be arranged in the circumferential direction. Optionally, the fixed disk is connected to the drive motor. The drive motor drives the cross flow fan to rotate by driving the fixed disk of the first fan blade portion 10 or the second fan blade portion 20 to rotate. Optionally, a locking structure (not shown) is provided between the first fan blade portion 10 and the second fan blade portion 20, and the locking structure is configured to lock the first fan blade portion 10 and the second fan blade portion 20 relative to each other. Position to restrict the movement of the second blade portion 20 relative to the first blade portion 10. Optionally, the locking structure is a snap ring that can be opened and closed, and the snap ring is configured to simultaneously clamp the blades of the first blade portion 10 and the second blade portion 20 to prevent the first blade portion 10 and the second blade portion The blade portion 20 relatively moves.

The first blade portion 10 is cylindrical and has two ends in the longitudinal direction, and the end facing the second blade portion 20 serves as the first end. A connecting ring 11 is provided at the first end, and the connecting ring 11 is used to fix the blades of the first blade portion 10 so that the blades are enclosed in a cylindrical shape. The center of the connecting ring 11 is located at the axis of the first fan blade portion 10, and the connecting ring 11 extends radially into a ring shape. In this way, the connecting ring 11 is adapted to the blade distribution at the end of the first fan blade portion 10. The via hole 12 on the connecting ring 11 allows one side of the second fan blade portion 20 to pass through, so that the second fan blade portion 20 and the first fan blade portion 10 can form a sleeve structure, and the connecting ring 11 is located on the via hole The part between 12 can support the second fan part 20 to a certain extent, which is beneficial to maintain the cylindrical structure of the second fan part 20, and when the first fan part 10 or the second fan part 20 is When one side is driven by the motor and starts to rotate, it can drive the other side to rotate. Optionally, the number of the vias 12 is multiple, and they are arranged in a ring shape along the connecting ring 11 so that each second blade 201 can pass through the vias 12. Optionally, the diameter of the second fan blade portion 20 is larger than the diameter of the first fan blade portion 10, and the diameter of the ring enclosed by the via hole 12 is larger than the diameter of the first fan blade portion 10. In this way, the first blade portion 10 can be sleeved with the second blade portion 20 having a larger diameter. Optionally, the diameter of the second fan blade portion 20 is smaller than the diameter of the first fan blade portion 10, and the diameter of the ring enclosed by the via hole 12 is smaller than the diameter of the first fan blade portion 10. In this way, the first blade portion 10 can be sleeved with the second blade portion 20 with a smaller diameter.

The second fan blade portion 20 includes a plurality of second blades 201 enclosed in a cylindrical shape, and the second blades 201 extend into the via hole 12. The plurality of second blades 201 are enclosed in a cylindrical shape to realize the blowing of the second fan blade portion 20. One end of the second blade 201 extends into the through hole 12 so that the second fan blade part 20 is restricted and only moves relative to the first fan blade part 10 in the axial direction. Wherein, one end of the second blade 201 extending into the through hole 12 is a perforated end. Optionally, the material of the second blade 201 is aluminum alloy or engineering plastics. The aluminum alloy impeller has high strength, light weight, high temperature resistance, and can maintain a long-term stable operation without deformation; the plastic impeller is injection molded by a mold and then welded by ultrasonic.

In some embodiments, part or all of the perforated ends of the second blade 201 are provided with a first limiting structure 211, and the first limiting structure 211 is configured to prevent the second blade 201 from falling out of the through hole 12.

By providing the first limiting structure 211, the second blade 201 can be prevented from escaping from the through hole 12, and the first fan blade portion 10 and the second fan blade portion 20 can be prevented from moving too far in the axial direction and separating. The first limiting structure 211 can be provided at the perforated end of each second blade 201, so that the connecting ring 11 limits the second blade 201 so that the second fan blade part 20 is only axially opposite to the first fan blade part. 10 moves, the limiting effect on the second blade part 20 is stronger. All the second blades 201 are provided with the first limiting structure 211, which can also make the second fan blade portion 20 more stable. The first limiting structure 211 can also be provided only on the perforated end of a part of the second blade 201. In this way, the second blade 201 can also be limited, so that the second fan blade portion 20 can be axially opposed to the first fan blade. The movement of the part 10 can also save the use of the first limiting structure 211.

In some embodiments, as shown in FIG. 1, the first limiting structure 211 is formed by extending the perforated end of the second blade 201 to the outside along the radial direction of the second blade 201. The perforated end of the second blade 201 extends radially outward to form a first limiting structure 211. The first limiting structure 211 can limit the second blade 201 on which it is located. When the fan blade parts 10 are far away from each other to a certain extent, the first limiting structure 211 can abut against the part of the connecting ring outside the via hole 12, and cannot pass through the via hole 12, so that the perforated end of the second blade 201 is performed. The limit prevents the perforated end of the second blade 201 from escaping from the through hole 12 of the connecting ring 11. In this embodiment, each first limiting structure 211 correspondingly defines the farthest moving position of the second blade 201 where it is located.

Optionally, the shape of the via hole 12 matches the cross-sectional shape of the second blade 201, and the cross-sectional area of the first limiting structure 211 is larger than the cross-sectional area of the second blade 201. In this way, the via hole 12 can prevent the first limiting structure 211 from passing through. Optionally, the shape of the via hole 12 matches the cross-sectional shape of the second blade 201, and the cross-sectional shape of the first limiting structure 211 is different from the cross-sectional shape of the second blade 201. In this way, the via hole 12 can also prevent the first limiting structure 211 from passing through. Optionally, the shape of the via hole 12 is adapted to the shape of the first limiting structure 211. In this way, the first limiting structure 211 passes through the via hole 12.

Optionally, as shown in FIG. 5, the via hole 12 includes a connected extending portion 120 and a clamping portion 121, and the shape enclosed by the extending portion 120 and the clamping portion 121 is the same as the shape of the first limiting structure 211 Adapted to allow the first limiting structure 211 to pass through; the clamping portion 121 is configured to clamp when the first limiting structure 211 passes through the through hole 12 and the second fan blade portion 20 rotates relative to the first fan blade portion 10 Second blade 201

When the shape enclosed by the extending portion 120 and the clamping portion 121 matches the first limiting structure 211, the first limiting structure 211 can pass through. The clamping portion 121 communicates with the extending portion 120, and the clamping portion 121 is used for clamping the second blade 201. After the first limiting structure 211 passes through the through hole 12, the second fan blade portion 20 is rotated relative to the first fan blade portion 10, and the second blade 201 is locked into the clamping portion 121 to prevent the second fan blade portion 20 from being relative to the first fan blade portion. One blade part 10 moves.

Optionally, the clamping portion 121 is provided on one side of the extending portion 120 in a clockwise direction, or one side in a counterclockwise direction. When the clamping portion 121 is provided on one side of the extending portion 120 in the clockwise direction, the second fan blade portion 20 is rotated clockwise relative to the first fan blade portion 10 to be able to clamp the second blade 201; When the holding portion 121 is provided on one side of the extending portion 120 in the counterclockwise direction, the second blade portion 20 is rotated counterclockwise relative to the first blade portion 10 to be able to hold the second blade 201. Optionally, the clamping part 121 clamps the two long sides of the second blade 201. In this way, the position of the second blade 201 can be restricted and the movement of the second blade portion 20 relative to the first blade portion 10 can be prevented.

Through this embodiment, the first fan blade part 10 and the second fan blade part 20 can be detachably connected, which facilitates the assembly of the first fan blade part 10 and the second fan blade part 20, and can be installed in the first fan blade part. 10 and the second fan blade portion 20 are sleeved, and their relative positions are fixed. When one of the first fan blade portion 10 or the second fan blade portion 20 is driven to rotate, the other can be driven to rotate.

In some embodiments, as shown in FIGS. 3 and 4, the first fan blade portion 10 and the second fan blade portion 20 are alternately arranged. The first fan blade portion 10 and the second fan blade portion 20 are alternately arranged, so that the cross flow fan can be contracted and extended at multiple locations, and the overall length of the cross flow fan can also be shortened. Optionally, the number of the first blade parts 10 is multiple. Optionally, the number of the second fan blade portion 20 is multiple. The first blade portion 10 and the second blade portion 20 are alternately arranged. Optionally, the connecting rings 11 are respectively arranged at both ends of the first fan blade portion 10. In this way, both ends of the first fan blade portion 10 can be coaxially sleeved with different second fan blade portions 20. Optionally, the first limiting structure is provided at both ends of the second blade 201 of the second fan blade portion 20. In this way, both ends of the second fan blade portion 20 can be coaxially sleeved with different first fan blade portions 10. In this case, a fixing ring may be provided in the middle of the second fan blade portion 20 to fix the relative position of each second blade 201. Optionally, one end of the second fan blade portion 20 is coaxially sleeved with one first fan blade portion 10, and the other end is fixedly connected with the other first fan blade portion 10 through a fixed disk. In this way, the structure of the second blade portion 20 can be made stronger and more stable.

The lengths of the first blade portion 10 and the second blade portion 20 may be the same or different. Optionally, the diameter of the first fan blade portion 10 is greater than that of the second fan blade portion 20, and the length of the first fan blade portion 10 is greater than the length of the second fan blade portion 20. The first fan blade portion 10 with a larger diameter generates a larger amount of air, making its length greater than that of the second fan blade portion 20, which is beneficial to maintaining the air volume of the cross flow fan, and the first fan blade portion 10 has a connecting ring 11. The structure is more stable, and it can maintain a certain degree of firmness even when its length is extended.

In some embodiments, as shown in FIGS. 6 and 7, the cross-flow fan further includes a third fan blade portion 30. The third fan blade part 30 is cylindrical, is coaxially sleeved with the second fan blade part 20, and can move relative to the second fan blade part 20 in the axial direction; wherein, the first fan blade part 10 and the third fan blade The parts 30 are respectively sleeved at both ends of the second fan blade part 20; the diameter of the second fan blade part 20 is between the first fan blade part 10 and the third fan blade part 30.

The third fan blade portion 30 and the second fan blade portion 20 are coaxially sleeved, that is, the third fan blade portion 30 and the second fan blade portion 20 form a sleeve structure, and the third fan blade portion 30 can be axially opposed The second blade portion 20 moves to adjust the length of the cross-flow fan. The third fan blade portion 30 and the first fan blade portion 10 are respectively sleeved with both ends of the first fan blade portion 10, and the cross flow fan formed is the first fan blade portion 10 and the second fan blade portion 20 in the longitudinal direction. And the third fan blade part 30. Wherein, the diameter of the second fan blade part 20 is between the first fan blade part 10 and the third fan blade part 30. For example, the size relationship of the diameter of each blade part is: the first blade part 10>the second blade part 20>the third blade part 30, or the third blade part 30>the second blade part 20>the first blade part. A fan blade part 10. In this way, by adjusting the second fan blade portion 20 to be close to and sleeved relative to the first fan blade portion 10, and the third fan blade portion 30 to be close to and sleeved relative to the second fan blade portion 20, the length of the cross flow fan can be further shortened. Optionally, the number of the first fan blade portion 10, the second fan blade portion 20, and the third fan blade portion 30 are multiple. In this way, a cross-flow fan with a longer length can be assembled to expand the air supply range of the cross-flow fan.

Optionally, the diameter of the first blade portion 10>the diameter of the second blade portion 20>the diameter of the third blade portion 30, and the first blade portion 10, the second blade portion 20, and the third blade portion 30 are all Two, coaxially sleeve the third fan blade part 30, the second fan blade part 20, the first fan blade part 10, the first fan blade part 10, the second fan blade part 20 and the third fan in order from left to right Leaf 30. In this way, the diameter of the formed cross-flow fan is gradually reduced from the middle to the two ends, and the effect of strong air supply at the middle and weak ends at the two ends is realized, and the user experience is improved. Optionally, the length of the third fan blade part 30 is longer than the first fan blade part 10 and the second fan blade part 20. This is also a combination of cross-flow fans, which can expand the range of weak winds.

In some embodiments, the first fan blade portion 10 includes a plurality of first blades 101 enclosing a cylindrical shape, and the diameter of the first fan blade portion 10 is larger than the diameter of the second fan blade portion 20. In this way, when the length of the cross-flow fan is adjusted, one end of the second fan blade portion 20 can be retracted into the first fan blade portion 10. Optionally, the number of the first blades 101 is more than that of the second blades 201. When the diameter of the second blade portion 20 is smaller than that of the first blade portion 10, the number of the second blades 201 is less than that of the first blades 101. On the one hand, it can avoid the reduction of the blade pitch caused by the diameter reduction, which will affect the progress. Wind, on the other hand, can reduce the amount of blades. The number of second blades 201 is reduced, and when the first blade portion 10 and the second blade portion 20 partially overlap, the influence on the flow of air entering the first blade portion 10 can be reduced. The reduction in the number of the second blades 201 can reduce the number or area of the vias 12 on the connecting ring 11, thereby reducing the impact on the mechanical strength of the connecting ring 11, and keeping the connecting ring 11 firm and stable. The decrease in the number of the second blades 201 can also make the radial extension of the first limiting structure relative to the blades longer. This is because the decrease in the number of the second blades 201 correspondingly increases the distance between the first limiting structures and the first limiting structure. The position structure can extend longer in the radial direction. In this way, the first limit structure can better prevent the second blade 201 from escaping from the through hole 12. Since the diameter of the first blade portion 10 is larger than that of the second blade portion 20, when the cross flow fan rotates, the air volume of the first blade portion 10 is greater than the air volume of the second blade portion 20, which can make the cross flow The fan creates a strong air supply area and a weak air supply area outside the air conditioner.

Optionally, the material of the first blade 101 is aluminum alloy or engineering plastics. The aluminum alloy impeller has high strength, light weight, high temperature resistance, and can maintain stable operation for a long time without deformation; the plastic impeller is injection molded by a mold and then welded by ultrasonic waves. It can be used in applications with low rotation speed and has a large diameter.

In some embodiments, the width of the second blade 201 is greater than the width of the first blade 101. On the basis of the reduction in the number of second blades 201, the width of the second blade 201 is greater than the width of the first blade 101, which can enhance the structural strength of the second blade portion 20, make the second blade 201 more stable and stable, and reduce the second blade. Vibration noise generated when the blade 20 rotates. Due to the reduction of the number of blades in the second fan blade portion 20, the mechanical strength is lower than that of the first fan blade portion 10, and the width of the second blade 201 is increased. In addition, the width of the second blade 201 is increased, and the air blowing volume can be appropriately increased, and the air blowing volume of the second blade portion 20 can be prevented from excessively decreasing. Optionally, the thickness of the second blade 201 is greater than the thickness of the first blade 101. The increase in thickness can enhance the mechanical strength of the second blade 201 and make it stronger and less susceptible to bending and deformation when rotating together with the first blade portion 10.

In some embodiments, part or all of the blades of the cross flow fan include a main body and a constriction. The main body is in the shape of a belt; the contraction part is arranged on the main body and has a width smaller than the width of the main body. The width of the constricted part is smaller than the width of the main body. When the airflow passes through the constricted part of the blade, the wind pressure of the airflow can be enhanced, thereby increasing the air outlet pressure of the cross-flow fan. Optionally, the constriction is provided at the middle or end of the main body. In this way, the supercharging effect on the airflow can be achieved.

In some embodiments, part of the blades of the cross-flow fan include the first blade 101 or the second blade 201. That is, the first blade 101 includes a main body and a constriction, or the second blade 201 includes a main body and a constriction. Optionally, the second fan blade portion 20 has a smaller diameter than the first fan blade portion 10, and the second blade 201 includes a main body and a constricted portion. In this way, the second blade 201 can appropriately increase the wind pressure through the constricted portion, thereby increasing the air supply volume of the second blade 201, and compensate for the decrease in the air supply volume due to the decrease in the number of the second blades 201.

In some embodiments, the second fan blade portion 20 includes a fixing ring (not shown). The fixing ring is connected with each second blade 201 so that the second blade 201 is enclosed in a cylindrical shape. The fixing ring is conducive to the firmness and stability of the second blade 201, so that when the second fan blade portion 20 rotates together with the first fan blade portion 10, it can reduce shaking, avoid bending deformation, and reduce noise. Optionally, the second blade 201 is detachably connected to the fixed ring. In this way, the number of the second blades 201 can be adjusted according to the user's demand for the air supply effect, so as to meet the different needs of the user.

As shown in FIG. 8, an embodiment of the present disclosure provides an air conditioner, including the cross-flow fan provided in any one of the foregoing embodiments. By using the cross flow fan, the air conditioner can shorten the length of the cross flow fan to make it easy to take out the cross flow fan from the inside of the air conditioner when the cross flow fan needs to be repaired or cleaned; or the cross flow fan can be adjusted according to the air supply requirements. Length to change the air supply effect. Optionally, the air conditioner is an air conditioner indoor unit. The cross-flow fan rotates and sends air to the room. Optionally, the air conditioner is on-hook or cabinet. When the air conditioner is on-hook, the cross flow fan can be placed horizontally, and when the air conditioner is a cabinet machine, the cross flow fan can be placed vertically.

In some embodiments, the cross flow fan is arranged in the air duct 40 of the air conditioner, and the side wall of the air duct 40 is provided with an opening 41, and the opening 41 is configured to take out and put the cross flow fan in. The rotation of the cross flow fan generates air flow through the air duct 40 and is delivered to the air outlet of the air conditioner. An opening 41 is opened on the side wall of the air duct 40. The cross flow fan can be shortened by adjusting the relative movement between the blades to make the cross flow The fan passes through the opening 41, so that the cross-flow fan is taken out or put in the air duct 40. Optionally, the opening 41 is arranged close to a location where the cross-flow fan and the air conditioner are fixed. In this way, it is convenient to install or remove the cross-flow fan through the opening 41. Optionally, the length of the opening 41 is less than the length of the cross flow fan. In this way, the area of the opening 41 on the side wall of the air duct 40 can be reduced, which is beneficial for the structure of the air duct 40 to remain stable. Optionally, the air conditioner includes a housing 43, the side wall of the air duct 40 is located inside the housing 43, and the back side plate of the housing 43 is detachable. The back side panel is the side panel on the side close to the wall when the air conditioner is installed. In this way, by removing the back side plate of the housing 43, the side wall of the air duct 40 can be exposed, and the opening 41 can be exposed. Or the back side plate of the housing 43 is also provided with an opening, and the opening is configured to expose the opening 41 of the side wall of the air duct 40. In this way, through the opening of the casing 43 and the opening 41 of the side wall of the air duct 40, the cross flow fan can be detached and assembled.

In some embodiments, the opening 41 is provided with a cover plate 42, and the outer surface of the cover plate 42 is provided with a pressing portion 420, and the pressing portion 420 is configured to cause deformation of the cover plate 42 to escape the opening 41 after being pressed. By arranging the cover plate 42 on the opening 41, the components in the air duct 40 can be protected, air leakage can be avoided, and the structure of the air duct 40 can be kept stable. Optionally, the cover 42 and the opening 41 are detachably connected. In this way, the cover plate 42 is enabled to open and close the opening 41. The outer surface of the cover plate 42 is provided with a pressing portion 420. When the cover plate 42 needs to be disassembled, the pressing portion 420 can be pressed to deform the cover plate 42 and detach from the opening 41 to realize disassembly. Optionally, the pressing portion 420 is a groove formed by recessing the surface of the cover plate 42 into the air duct 40. In this way, the cover plate 42 is easily deformed.

In some embodiments, the edge of the cover plate 42 is provided with an extension portion, and the edge of the opening 41 is provided with a slot for holding the extension portion. When the cover plate 42 is deformed under pressure, the extension portion comes out of the slot. The cover plate 42 realizes the engagement and separation with the opening 41 through the function of the extension part and the slot. When the extension part is locked into the slot, the cover plate 42 covers the opening 41 and is fixed to the side wall of the air duct 40. When the pressing part 420 is pressed, the cover plate 42 is deformed and the extension part comes out of the slot, and the cover plate 42 and the opening 41 Separate.

The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments only represent possible changes. Unless explicitly required, the individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is only limited by the appended claims.

Claims

A cross flow fan is characterized in that it comprises:

The first blade part includes a plurality of first blades enclosed in a cylindrical shape and a connecting ring with a plurality of through holes;

The second blade part includes a plurality of second blades enclosed in a cylindrical shape, and each of the second blades passes through one of the through holes, so that the second blade part and the first blade part It is coaxially sleeved, and can move relative to the first blade part along the axial direction.
The cross-flow fan according to claim 1, wherein part or all of the perforated ends of the second blades are provided with a first limiting structure, and the first limiting structure is configured to prevent the second blades Escape from the pore structure.
The cross flow fan according to claim 2, wherein the first limiting structure is formed by a perforated end of the second blade extending outward in a radial direction of the second blade.
The cross-flow fan according to claim 2, wherein the through hole comprises a connected extending portion and a clamping portion, and the shape enclosed by the extending portion and the clamping portion is the same as that of the first The shape of a limiting structure is adapted to allow the first limiting structure to pass through; the clamping portion is configured to pass through the via hole in the first limiting structure and the second fan blade When the part rotates relative to the first fan part, the second blade is clamped.
The cross flow fan according to claim 1, wherein the first fan blade portion and the second fan blade portion are alternately arranged.
The cross flow fan according to claim 1, wherein the diameter of the first fan blade portion is larger than the diameter of the second fan blade portion.
The cross flow fan according to claim 1, wherein the number of the first blades is more than that of the second blades.
The cross flow fan according to any one of claims 1 to 7, further comprising:

The third fan blade part is cylindrical, is coaxially sleeved with the second fan blade part, and can move relative to the second fan blade part in the axial direction;

Wherein, the first fan blade part and the third fan blade part are respectively sleeved on both ends of the second fan blade part; the diameter of the second fan blade part is between the first fan blade part and Between the third fan blade parts.
An air conditioner, characterized by comprising the cross-flow fan according to any one of claims 1 to 8.
The air conditioner according to claim 9, wherein the cross-flow fan is arranged in the air duct of the air conditioner, the side wall of the air duct is provided with an opening, and the opening is configured to be taken out and put in The cross-flow fan; the opening is provided with a cover plate, the outer surface of the cover plate is provided with a pressing part, the pressing part is configured to cause the cover plate to deform to escape the opening after being pressed.