Patent Description:
In the prior art, an air sweeping blade of an air sweeping mechanism of an air conditioner has a rigid blade and a flexible blade two forms generally. The rigid blade is rotationally connected with a connecting rod and a blade clamping board, thus realizing rotational air sweeping. The flexible blade is fixedly connected with the blade clamping board and is rotationally connected with the connecting rod, thus realizing air sweeping by flexible bending.

However, a connecting rod which is rotationally connected with a connecting rod shaft and a existing sweeping blade are generally independent structure. That is, an assembly groove matched with the connecting rod is provided on the blade, and two ends of the connecting rod shaft are connected with two sides of the assembly groove. Since the blade is thinner, the connecting strength is not enough, the condition of breakage of connection between the connecting rod shaft and the blade caused by pulling easily happens during final assembly, and the usage reliability is reduced.

Besides, the existing flexible blade has the defect of breakage at a flexible bending part, and the structure needs to be further optimized.

<CIT> discloses a wind swing structure of a split wall-hanging type air conditioner includes a tongue; a base which has a structure suitable to be installed on the tongue ; multiple wind swing blades which protrude from one side of the base and are integrated with the base ; a blade connecting rod which is provided through the multiple wind swing blades; a transmission mechanism which is connected with the blade connecting rod; and a motor which is connected with the transmission mechanism. An air conditioner is also provided, which includes the wind swing structure as above described.

<CIT> discloses an air sweeping structure and an air conditioner with the air sweeping structure. The air sweeping structure comprises a connection rod , multiple air sweeping blades and a drive motor. The air sweeping blades are connected to the connection rod in a pivot joint mode in parallel in the extension direction of the connection rod. The drive motor is provided with a rotary drive rod. The drive rod is in drive connection with one of the air sweeping blades. The air sweeping structure and the air conditioner with the air sweeping structure effectively solve the problems that the air sweeping structure is complicated in structure and not convenient to install in the prior art.

The invention aims to provide an air sweeping blade can improve the structural strength and an air sweeping mechanism, an air conditioner.

The invention provides an air sweeping blade, which comprises a blade body. A connecting rod shaft rotationally connected with a connecting rod is provided on the blade body, and the connecting rod shaft extends to an edge of the blade body along an axis of the connecting rod shaft and is fixedly connected with the blade body.

Further, the connecting rod shaft and the blade body are integrally formed.

Further, the blade body has a flexible area, a length direction of the flexible area is parallel to an axis direction of the connecting rod shaft, a width direction of the flexible area is perpendicular to the axis direction of the connecting rod shaft, and the flexible area has an opening extending along the length direction thereof.

Further, the width of the flexible area is c, the length of the flexible area is e, and e<NUM>/<NUM>≤c≤e<NUM>/<NUM>.

Further, there is one opening, and the width of the opening is a, wherein c<NUM>/<NUM>≤a≤c<NUM>/<NUM>.

Further, the length b of the opening satisfies a formula: <MAT>, wherein d is the thickness of the flexible area, M is a preset force moment, E is an elastic model of a material of the flexible area, and y is a preset offset of the blade body.

The invention also provides an air sweeping mechanism, which comprises a blade clamping board, a connecting rod and a motor assembly for driving the connecting rod. Multiple aforementioned air sweeping blades are provided on the blade clamping board. Connecting rod shafts of the multiple air sweeping blades are rotationally connected with the connecting rod.

Further, a rotational clamping groove is provided on the connecting rod, and a connecting rod shaft is clamped into the rotational clamping groove.

Further, a clamping hole is provided on the blade clamping board, and a clamping jaw clamping fixed with the clamping hole is provided on the air sweeping blade.

The invention also provides an air conditioner, which comprises a base. The aforementioned air sweeping mechanism is provided on the base.

According to the air sweeping blade, the air sweeping mechanism and the air conditioner of the invention, the connecting rod shaft extends to the edge of the blade body along the axis and is fixedly connected with the blade body. On one hand, the problem of connection between the connecting shaft and the blade body is solved, the reliability is improved, and the condition of breakage caused by pulling during assembly is avoided; and on the other hand, the connecting rod shaft extends to the edge of the blade body and also serves as a reinforcement rib of the blade body, thereby improving the rigidity of the blade body, and preventing the blade body from distorting.

The drawings forming a part of the application are intended to provide further understanding of the invention. The schematic embodiments and descriptions of the invention are intended to explain the invention, and do not form improper limits to the invention. In the drawings:.

<NUM>, air sweeping blade; <NUM>, blade body; <NUM>, assembly groove; <NUM>, connecting rod shaft; <NUM>, flexible area; <NUM>, opening; <NUM>, clamping jaw; <NUM>, connecting rod; <NUM>, blade clamping board; <NUM>, motor assembly; <NUM>, base; and <NUM>, clamping groove.

The invention will be described below with reference to the drawings and the embodiments in detail.

The present invention is defined by the appended independent claims, the dependent claims constitute embodiments of the invention, any other embodiment of the description not covered by the appended claims is to be considered as not being part of the present invention.

As shown in <FIG>, an air sweeping blade according to the invention comprises a blade body <NUM>. A connecting rod shaft <NUM> rotationally connected with a connecting rod <NUM> is provided on the blade body <NUM>, and the connecting rod shaft <NUM> extends to an edge of the blade body <NUM> along an axis of the connecting rod shaft and is fixedly connected with the blade body <NUM>.

As shown in 2a, 2b, and <FIG>, the blade body <NUM> tends to be thin, and the thickness is about <NUM>. With the own characteristic of a material, the deformation of the blade formed by injection is difficult to guarantee, the overall rigidity is weak, the defects of collapse and distortion of the blade body easily happens, and the appearance looks not beautiful. In order to improve the deformation of the blade, the rigidity of the blade should be improved. What can be done is that rib is added to the blade for improvement. By adding a reinforcement rib, the rigidity of the blade may be improved, the deformation of the blade body is improved, and the appearance effect is thus beautified.

Similarly, since the thickness of the blade body <NUM> is relatively thin and is small relative to the diameter of the connecting rod shaft <NUM>, an assembly groove <NUM> matched with the connecting rod <NUM> is provided on the blade body <NUM>. When the connecting rod shaft <NUM> is provided on the assembly groove <NUM>, a root of the connecting rod shaft <NUM> in combination with the blade body <NUM> will form steps which cause stress concentration. Connected materials of a combined part there between are few, so when the connecting rod <NUM> is assembled, if the blade is pulled forcibly, the connecting rod shaft <NUM> will be easily broken from the root under the action of external force. If the connecting rod shaft <NUM> penetrates through the whole blade surface or a large part of the blade surface of the blade body <NUM>, the problems of stress concentration and few connected materials of the root of the connecting rod shaft <NUM> may be solved. Large rounded corners of the connecting rod shaft <NUM> and the blade body <NUM> facilitates stress release and strength increase, and the problem of assembly breakage of the connecting rod shaft <NUM> is practically and effectively improved.

The invention combines the above-mentioned two aspects. The connecting rod shaft <NUM> extends to the edge of the blade body <NUM> along the axis and is fixedly connected with the blade body <NUM>, such that the connecting rod shaft <NUM> penetrates through the whole blade surface or a large part of the blade surface of the blade body <NUM>, and serves as a reinforcement rib of the blade body <NUM>, thereby solving the problems of connection between the connecting rod shaft <NUM> and the blade body <NUM> and insufficient rigidity of the blade body <NUM>.

As shown in <FIG>, <FIG> and <FIG>, in a specific setting form, the connecting rod shaft <NUM> extends on blade surfaces of two sides of the blade body <NUM>, and extends on the blade surface of only one side as shown in <FIG>. In an embodiment, the connecting rod shaft <NUM> and the blade body <NUM> are integrally formed, i.e., integrally injected to facilitate processing, and the connecting strength can be improved.

As shown in <FIG>, <FIG> and <FIG>, the air sweeping blade in the invention is a flexible blade. That is, the blade body <NUM> has a flexible area <NUM>, a length direction of the flexible area <NUM> is parallel to an axis direction of the connecting rod shaft <NUM>, a width direction of the flexible area <NUM> is perpendicular to the axis direction of the connecting rod shaft <NUM>, and the flexible area <NUM> is flexibly bent during the process of the connecting rod <NUM> drives the connecting rod shaft <NUM> movement, so as to change an air guide direction of the blade surface. In an embodiment, the flexible area <NUM> has an opening <NUM> extending along the length direction thereof. The effect of reducing the elasticity of the flexible area <NUM> can be achieved, so the magnitude of a driving force moment for making the flexible area <NUM> deform may be reduced.

As shown in <FIG>, a rotational force moment of the blade body <NUM> has more to do with the flexible area <NUM>, and the width c of the flexible area <NUM> influences a rotational radius, and is indirectly feedback to the force moment of the blade. The bigger c is, the better it is. However, a brought injection defect is relatively serious, and a reasonable width is required. In an embodiment, e<NUM>/<NUM> ≤ c ≤ e<NUM>/<NUM>, where e is the length of the flexible area <NUM>.

In an embodiment, there is one opening <NUM>. Compared with a mode of providing multiple openings <NUM>, this mode may avoid the problem of breakage of middle connection of multiple openings, and may reduce the force moment needed for rotation of the blade. In view of the problems of connecting strength and injection gluing, the width a of the opening <NUM> is c<NUM>/<NUM> ≤ a ≤ c<NUM>/<NUM>, generally.

As shown in <FIG> and <FIG>, the thickness of the flexible area <NUM> is d, the length b of the opening <NUM> is calculated according to a formula <MAT>, the width of a connected part between two ends of the opening <NUM> is equally divided, and the problem of forming via an injection process can be effectively solved. Meanwhile, the rotational force moment reaches a higher level, wherein M is a preset force moment, which is a maximum rotational force moment provided by an air sweeping stepping motor generally, E is an elastic model of a material of the flexible area <NUM>, and y is a preset offset of the blade body <NUM>, and generally adopts a chord length corresponding to an air sweeping angle at which the blade rotates around an assumed rotational shaft of the flexible area. That is, when product function requirements and the material adopted by the flexible area are determined, M, E and y are constant values, so the length b of the opening <NUM> is obtained by inverse estimation according to the formula <MAT>.

As shown in <FIG>, <FIG> and <FIG>, the invention also provides an air sweeping mechanism, which comprises a blade clamping board <NUM>, a connecting rod <NUM> and a motor assembly <NUM> for driving the connecting rod <NUM>. Multiple aforementioned air sweeping blades <NUM> are provided on the blade clamping board <NUM>. Connecting rod shafts <NUM> of the multiple air sweeping blades <NUM> are rotationally connected with the connecting rod <NUM>. The problem of insufficient strength of the blade can be effectively solved, and the problem of breakage of the root of the connecting rod shaft <NUM> is also solved.

As shown in <FIG>, a rotational clamping groove <NUM> is provided on the connecting rod <NUM>, and a connecting rod shaft <NUM> is clamped into the rotational clamping groove <NUM>, so the connecting rod <NUM> is in rotational match with the connecting rod shaft <NUM> to drive the blade to swing so as to sweep air.

As shown in <FIG>, <FIG>, <FIG>, and <FIG>, a clamping hole is provided on the blade clamping board <NUM>, and a clamping jaw <NUM> clamping fixed with the clamping hole is provided on the air sweeping blade <NUM>. During assembly, the clamping jaw <NUM> penetrates through the clamping hole and clamp in the edge of the clamping hole, and the connection is convenient and reliable.

As shown in <FIG>, the invention also provides an air conditioner, which comprises a base <NUM>. The aforementioned air sweeping mechanism is provided on the base <NUM>, so the reliability can be effectively improved.

From the above description, it may be seen that the above embodiment of the invention achieves the following technical effects.

Claim 1:
An air sweeping blade, comprising a blade body (<NUM>), a connecting rod shaft (<NUM>) rotationally connectable with a connecting rod (<NUM>) being provided on the blade body (<NUM>), wherein the connecting rod shaft (<NUM>) extends to an edge of the blade body (<NUM>) along an axis of the connecting rod shaft (<NUM>) and is fixedly connected with the blade body (<NUM>), such that the connecting rod shaft (<NUM>) penetrates through the whole blade surface or a large part of the blade surface of the blade body (<NUM>), and serves as a reinforcement rib of the blade body (<NUM>), the blade body (<NUM>) has a flexible area (<NUM>), a length direction of the flexible area (<NUM>) is parallel to an axis direction of the connecting rod shaft (<NUM>), a width direction of the flexible area (<NUM>) is perpendicular to the axis direction of the connecting rod shaft (<NUM>), and the flexible area (<NUM>) has an opening (<NUM>) extending along the length direction thereof, and a width of the opening (<NUM>) is a, and a width of the flexible area (<NUM>) is c, wherein c<NUM>/<NUM> ≤ a ≤ c<NUM>/<NUM>.